--- /dev/null
+
+What: /sys/class/net/<iface>/batman-adv/mesh_iface
+Date: May 2010
+Contact: Marek Lindner <lindner_marek@yahoo.de>
+Description:
+ The /sys/class/net/<iface>/batman-adv/mesh_iface file
+ displays the batman mesh interface this <iface>
+ currently is associated with.
+
+What: /sys/class/net/<iface>/batman-adv/iface_status
+Date: May 2010
+Contact: Marek Lindner <lindner_marek@yahoo.de>
+Description:
+ Indicates the status of <iface> as it is seen by batman.
--- /dev/null
+
+What: /sys/class/net/<mesh_iface>/mesh/aggregated_ogms
+Date: May 2010
+Contact: Marek Lindner <lindner_marek@yahoo.de>
+Description:
+ Indicates whether the batman protocol messages of the
+ mesh <mesh_iface> shall be aggregated or not.
+
+What: /sys/class/net/<mesh_iface>/mesh/bonding
+Date: June 2010
+Contact: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
+Description:
+ Indicates whether the data traffic going through the
+ mesh will be sent using multiple interfaces at the
+ same time (if available).
+
+What: /sys/class/net/<mesh_iface>/mesh/fragmentation
+Date: October 2010
+Contact: Andreas Langer <an.langer@gmx.de>
+Description:
+ Indicates whether the data traffic going through the
+ mesh will be fragmented or silently discarded if the
+ packet size exceeds the outgoing interface MTU.
+
+What: /sys/class/net/<mesh_iface>/mesh/gw_bandwidth
+Date: October 2010
+Contact: Marek Lindner <lindner_marek@yahoo.de>
+Description:
+ Defines the bandwidth which is propagated by this
+ node if gw_mode was set to 'server'.
+
+What: /sys/class/net/<mesh_iface>/mesh/gw_mode
+Date: October 2010
+Contact: Marek Lindner <lindner_marek@yahoo.de>
+Description:
+ Defines the state of the gateway features. Can be
+ either 'off', 'client' or 'server'.
+
+What: /sys/class/net/<mesh_iface>/mesh/gw_sel_class
+Date: October 2010
+Contact: Marek Lindner <lindner_marek@yahoo.de>
+Description:
+ Defines the selection criteria this node will use
+ to choose a gateway if gw_mode was set to 'client'.
+
+What: /sys/class/net/<mesh_iface>/mesh/orig_interval
+Date: May 2010
+Contact: Marek Lindner <lindner_marek@yahoo.de>
+Description:
+ Defines the interval in milliseconds in which batman
+ sends its protocol messages.
+
+What: /sys/class/net/<mesh_iface>/mesh/hop_penalty
+Date: Oct 2010
+Contact: Linus Lüssing <linus.luessing@web.de>
+Description:
+ Defines the penalty which will be applied to an
+ originator message's tq-field on every hop.
+
+What: /sys/class/net/<mesh_iface>/mesh/vis_mode
+Date: May 2010
+Contact: Marek Lindner <lindner_marek@yahoo.de>
+Description:
+ Each batman node only maintains information about its
+ own local neighborhood, therefore generating graphs
+ showing the topology of the entire mesh is not easily
+ feasible without having a central instance to collect
+ the local topologies from all nodes. This file allows
+ to activate the collecting (server) mode.
--- /dev/null
+[state: 21-11-2010]
+
+BATMAN-ADV
+----------
+
+Batman advanced is a new approach to wireless networking which
+does no longer operate on the IP basis. Unlike the batman daemon,
+which exchanges information using UDP packets and sets routing
+tables, batman-advanced operates on ISO/OSI Layer 2 only and uses
+and routes (or better: bridges) Ethernet Frames. It emulates a
+virtual network switch of all nodes participating. Therefore all
+nodes appear to be link local, thus all higher operating proto-
+cols won't be affected by any changes within the network. You can
+run almost any protocol above batman advanced, prominent examples
+are: IPv4, IPv6, DHCP, IPX.
+
+Batman advanced was implemented as a Linux kernel driver to re-
+duce the overhead to a minimum. It does not depend on any (other)
+network driver, and can be used on wifi as well as ethernet lan,
+vpn, etc ... (anything with ethernet-style layer 2).
+
+CONFIGURATION
+-------------
+
+Load the batman-adv module into your kernel:
+
+# insmod batman-adv.ko
+
+The module is now waiting for activation. You must add some in-
+terfaces on which batman can operate. After loading the module
+batman advanced will scan your systems interfaces to search for
+compatible interfaces. Once found, it will create subfolders in
+the /sys directories of each supported interface, e.g.
+
+# ls /sys/class/net/eth0/batman_adv/
+# iface_status mesh_iface
+
+If an interface does not have the "batman_adv" subfolder it prob-
+ably is not supported. Not supported interfaces are: loopback,
+non-ethernet and batman's own interfaces.
+
+Note: After the module was loaded it will continuously watch for
+new interfaces to verify the compatibility. There is no need to
+reload the module if you plug your USB wifi adapter into your ma-
+chine after batman advanced was initially loaded.
+
+To activate a given interface simply write "bat0" into its
+"mesh_iface" file inside the batman_adv subfolder:
+
+# echo bat0 > /sys/class/net/eth0/batman_adv/mesh_iface
+
+Repeat this step for all interfaces you wish to add. Now batman
+starts using/broadcasting on this/these interface(s).
+
+By reading the "iface_status" file you can check its status:
+
+# cat /sys/class/net/eth0/batman_adv/iface_status
+# active
+
+To deactivate an interface you have to write "none" into its
+"mesh_iface" file:
+
+# echo none > /sys/class/net/eth0/batman_adv/mesh_iface
+
+
+All mesh wide settings can be found in batman's own interface
+folder:
+
+# ls /sys/class/net/bat0/mesh/
+# aggregated_ogms bonding fragmentation orig_interval
+# vis_mode
+
+
+There is a special folder for debugging informations:
+
+# ls /sys/kernel/debug/batman_adv/bat0/
+# originators socket transtable_global transtable_local
+# vis_data
+
+
+Some of the files contain all sort of status information regard-
+ing the mesh network. For example, you can view the table of
+originators (mesh participants) with:
+
+# cat /sys/kernel/debug/batman_adv/bat0/originators
+
+Other files allow to change batman's behaviour to better fit your
+requirements. For instance, you can check the current originator
+interval (value in milliseconds which determines how often batman
+sends its broadcast packets):
+
+# cat /sys/class/net/bat0/mesh/orig_interval
+# 1000
+
+and also change its value:
+
+# echo 3000 > /sys/class/net/bat0/mesh/orig_interval
+
+In very mobile scenarios, you might want to adjust the originator
+interval to a lower value. This will make the mesh more respon-
+sive to topology changes, but will also increase the overhead.
+
+
+USAGE
+-----
+
+To make use of your newly created mesh, batman advanced provides
+a new interface "bat0" which you should use from this point on.
+All interfaces added to batman advanced are not relevant any
+longer because batman handles them for you. Basically, one "hands
+over" the data by using the batman interface and batman will make
+sure it reaches its destination.
+
+The "bat0" interface can be used like any other regular inter-
+face. It needs an IP address which can be either statically con-
+figured or dynamically (by using DHCP or similar services):
+
+# NodeA: ifconfig bat0 192.168.0.1
+# NodeB: ifconfig bat0 192.168.0.2
+# NodeB: ping 192.168.0.1
+
+Note: In order to avoid problems remove all IP addresses previ-
+ously assigned to interfaces now used by batman advanced, e.g.
+
+# ifconfig eth0 0.0.0.0
+
+
+VISUALIZATION
+-------------
+
+If you want topology visualization, at least one mesh node must
+be configured as VIS-server:
+
+# echo "server" > /sys/class/net/bat0/mesh/vis_mode
+
+Each node is either configured as "server" or as "client" (de-
+fault: "client"). Clients send their topology data to the server
+next to them, and server synchronize with other servers. If there
+is no server configured (default) within the mesh, no topology
+information will be transmitted. With these "synchronizing
+servers", there can be 1 or more vis servers sharing the same (or
+at least very similar) data.
+
+When configured as server, you can get a topology snapshot of
+your mesh:
+
+# cat /sys/kernel/debug/batman_adv/bat0/vis_data
+
+This raw output is intended to be easily parsable and convertable
+with other tools. Have a look at the batctl README if you want a
+vis output in dot or json format for instance and how those out-
+puts could then be visualised in an image.
+
+The raw format consists of comma separated values per entry where
+each entry is giving information about a certain source inter-
+face. Each entry can/has to have the following values:
+-> "mac" - mac address of an originator's source interface
+ (each line begins with it)
+-> "TQ mac value" - src mac's link quality towards mac address
+ of a neighbor originator's interface which
+ is being used for routing
+-> "HNA mac" - HNA announced by source mac
+-> "PRIMARY" - this is a primary interface
+-> "SEC mac" - secondary mac address of source
+ (requires preceding PRIMARY)
+
+The TQ value has a range from 4 to 255 with 255 being the best.
+The HNA entries are showing which hosts are connected to the mesh
+via bat0 or being bridged into the mesh network. The PRIMARY/SEC
+values are only applied on primary interfaces
+
+
+LOGGING/DEBUGGING
+-----------------
+
+All error messages, warnings and information messages are sent to
+the kernel log. Depending on your operating system distribution
+this can be read in one of a number of ways. Try using the com-
+mands: dmesg, logread, or looking in the files /var/log/kern.log
+or /var/log/syslog. All batman-adv messages are prefixed with
+"batman-adv:" So to see just these messages try
+
+# dmesg | grep batman-adv
+
+When investigating problems with your mesh network it is some-
+times necessary to see more detail debug messages. This must be
+enabled when compiling the batman-adv module. When building bat-
+man-adv as part of kernel, use "make menuconfig" and enable the
+option "B.A.T.M.A.N. debugging".
+
+Those additional debug messages can be accessed using a special
+file in debugfs
+
+# cat /sys/kernel/debug/batman_adv/bat0/log
+
+The additional debug output is by default disabled. It can be en-
+abled during run time. Following log_levels are defined:
+
+0 - All debug output disabled
+1 - Enable messages related to routing / flooding / broadcasting
+2 - Enable route or hna added / changed / deleted
+3 - Enable all messages
+
+The debug output can be changed at runtime using the file
+/sys/class/net/bat0/mesh/log_level. e.g.
+
+# echo 2 > /sys/class/net/bat0/mesh/log_level
+
+will enable debug messages for when routes or HNAs change.
+
+
+BATCTL
+------
+
+As batman advanced operates on layer 2 all hosts participating in
+the virtual switch are completely transparent for all protocols
+above layer 2. Therefore the common diagnosis tools do not work
+as expected. To overcome these problems batctl was created. At
+the moment the batctl contains ping, traceroute, tcpdump and
+interfaces to the kernel module settings.
+
+For more information, please see the manpage (man batctl).
+
+batctl is available on http://www.open-mesh.org/
+
+
+CONTACT
+-------
+
+Please send us comments, experiences, questions, anything :)
+
+IRC: #batman on irc.freenode.org
+Mailing-list: b.a.t.m.a.n@b.a.t.m.a.n@lists.open-mesh.org
+ (optional subscription at
+ https://lists.open-mesh.org/mm/listinfo/b.a.t.m.a.n)
+
+You can also contact the Authors:
+
+Marek Lindner <lindner_marek@yahoo.de>
+Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
F: drivers/video/backlight/
F: include/linux/backlight.h
+BATMAN ADVANCED
+M: Marek Lindner <lindner_marek@yahoo.de>
+M: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
+M: Sven Eckelmann <sven@narfation.org>
+L: b.a.t.m.a.n@lists.open-mesh.org
+W: http://www.open-mesh.org/
+S: Maintained
+F: net/batman-adv/
+
BAYCOM/HDLCDRV DRIVERS FOR AX.25
M: Thomas Sailer <t.sailer@alumni.ethz.ch>
L: linux-hams@vger.kernel.org
source "net/sched/Kconfig"
source "net/dcb/Kconfig"
source "net/dns_resolver/Kconfig"
+source "net/batman-adv/Kconfig"
config RPS
boolean
obj-$(CONFIG_WIMAX) += wimax/
obj-$(CONFIG_DNS_RESOLVER) += dns_resolver/
obj-$(CONFIG_CEPH_LIB) += ceph/
+obj-$(CONFIG_BATMAN_ADV) += batman-adv/
--- /dev/null
+#
+# B.A.T.M.A.N meshing protocol
+#
+
+config BATMAN_ADV
+ tristate "B.A.T.M.A.N. Advanced Meshing Protocol"
+ depends on NET
+ default n
+ ---help---
+
+ B.A.T.M.A.N. (better approach to mobile ad-hoc networking) is
+ a routing protocol for multi-hop ad-hoc mesh networks. The
+ networks may be wired or wireless. See
+ http://www.open-mesh.org/ for more information and user space
+ tools.
+
+config BATMAN_ADV_DEBUG
+ bool "B.A.T.M.A.N. debugging"
+ depends on BATMAN_ADV != n
+ ---help---
+
+ This is an option for use by developers; most people should
+ say N here. This enables compilation of support for
+ outputting debugging information to the kernel log. The
+ output is controlled via the module parameter debug.
--- /dev/null
+#
+# Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+#
+# Marek Lindner, Simon Wunderlich
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of version 2 of the GNU General Public
+# License as published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA
+#
+
+obj-$(CONFIG_BATMAN_ADV) += batman-adv.o
+batman-adv-y += aggregation.o
+batman-adv-y += bat_debugfs.o
+batman-adv-y += bat_sysfs.o
+batman-adv-y += bitarray.o
+batman-adv-y += gateway_client.o
+batman-adv-y += gateway_common.o
+batman-adv-y += hard-interface.o
+batman-adv-y += hash.o
+batman-adv-y += icmp_socket.o
+batman-adv-y += main.o
+batman-adv-y += originator.o
+batman-adv-y += ring_buffer.o
+batman-adv-y += routing.o
+batman-adv-y += send.o
+batman-adv-y += soft-interface.o
+batman-adv-y += translation-table.o
+batman-adv-y += unicast.o
+batman-adv-y += vis.o
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "aggregation.h"
+#include "send.h"
+#include "routing.h"
+
+/* calculate the size of the hna information for a given packet */
+static int hna_len(struct batman_packet *batman_packet)
+{
+ return batman_packet->num_hna * ETH_ALEN;
+}
+
+/* return true if new_packet can be aggregated with forw_packet */
+static bool can_aggregate_with(struct batman_packet *new_batman_packet,
+ int packet_len,
+ unsigned long send_time,
+ bool directlink,
+ struct batman_if *if_incoming,
+ struct forw_packet *forw_packet)
+{
+ struct batman_packet *batman_packet =
+ (struct batman_packet *)forw_packet->skb->data;
+ int aggregated_bytes = forw_packet->packet_len + packet_len;
+
+ /**
+ * we can aggregate the current packet to this aggregated packet
+ * if:
+ *
+ * - the send time is within our MAX_AGGREGATION_MS time
+ * - the resulting packet wont be bigger than
+ * MAX_AGGREGATION_BYTES
+ */
+
+ if (time_before(send_time, forw_packet->send_time) &&
+ time_after_eq(send_time + msecs_to_jiffies(MAX_AGGREGATION_MS),
+ forw_packet->send_time) &&
+ (aggregated_bytes <= MAX_AGGREGATION_BYTES)) {
+
+ /**
+ * check aggregation compatibility
+ * -> direct link packets are broadcasted on
+ * their interface only
+ * -> aggregate packet if the current packet is
+ * a "global" packet as well as the base
+ * packet
+ */
+
+ /* packets without direct link flag and high TTL
+ * are flooded through the net */
+ if ((!directlink) &&
+ (!(batman_packet->flags & DIRECTLINK)) &&
+ (batman_packet->ttl != 1) &&
+
+ /* own packets originating non-primary
+ * interfaces leave only that interface */
+ ((!forw_packet->own) ||
+ (forw_packet->if_incoming->if_num == 0)))
+ return true;
+
+ /* if the incoming packet is sent via this one
+ * interface only - we still can aggregate */
+ if ((directlink) &&
+ (new_batman_packet->ttl == 1) &&
+ (forw_packet->if_incoming == if_incoming) &&
+
+ /* packets from direct neighbors or
+ * own secondary interface packets
+ * (= secondary interface packets in general) */
+ (batman_packet->flags & DIRECTLINK ||
+ (forw_packet->own &&
+ forw_packet->if_incoming->if_num != 0)))
+ return true;
+ }
+
+ return false;
+}
+
+#define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0)
+/* create a new aggregated packet and add this packet to it */
+static void new_aggregated_packet(unsigned char *packet_buff, int packet_len,
+ unsigned long send_time, bool direct_link,
+ struct batman_if *if_incoming,
+ int own_packet)
+{
+ struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
+ struct forw_packet *forw_packet_aggr;
+ unsigned char *skb_buff;
+
+ /* own packet should always be scheduled */
+ if (!own_packet) {
+ if (!atomic_dec_not_zero(&bat_priv->batman_queue_left)) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "batman packet queue full\n");
+ return;
+ }
+ }
+
+ forw_packet_aggr = kmalloc(sizeof(struct forw_packet), GFP_ATOMIC);
+ if (!forw_packet_aggr) {
+ if (!own_packet)
+ atomic_inc(&bat_priv->batman_queue_left);
+ return;
+ }
+
+ if ((atomic_read(&bat_priv->aggregated_ogms)) &&
+ (packet_len < MAX_AGGREGATION_BYTES))
+ forw_packet_aggr->skb = dev_alloc_skb(MAX_AGGREGATION_BYTES +
+ sizeof(struct ethhdr));
+ else
+ forw_packet_aggr->skb = dev_alloc_skb(packet_len +
+ sizeof(struct ethhdr));
+
+ if (!forw_packet_aggr->skb) {
+ if (!own_packet)
+ atomic_inc(&bat_priv->batman_queue_left);
+ kfree(forw_packet_aggr);
+ return;
+ }
+ skb_reserve(forw_packet_aggr->skb, sizeof(struct ethhdr));
+
+ INIT_HLIST_NODE(&forw_packet_aggr->list);
+
+ skb_buff = skb_put(forw_packet_aggr->skb, packet_len);
+ forw_packet_aggr->packet_len = packet_len;
+ memcpy(skb_buff, packet_buff, packet_len);
+
+ forw_packet_aggr->own = own_packet;
+ forw_packet_aggr->if_incoming = if_incoming;
+ forw_packet_aggr->num_packets = 0;
+ forw_packet_aggr->direct_link_flags = 0;
+ forw_packet_aggr->send_time = send_time;
+
+ /* save packet direct link flag status */
+ if (direct_link)
+ forw_packet_aggr->direct_link_flags |= 1;
+
+ /* add new packet to packet list */
+ spin_lock_bh(&bat_priv->forw_bat_list_lock);
+ hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list);
+ spin_unlock_bh(&bat_priv->forw_bat_list_lock);
+
+ /* start timer for this packet */
+ INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work,
+ send_outstanding_bat_packet);
+ queue_delayed_work(bat_event_workqueue,
+ &forw_packet_aggr->delayed_work,
+ send_time - jiffies);
+}
+
+/* aggregate a new packet into the existing aggregation */
+static void aggregate(struct forw_packet *forw_packet_aggr,
+ unsigned char *packet_buff,
+ int packet_len,
+ bool direct_link)
+{
+ unsigned char *skb_buff;
+
+ skb_buff = skb_put(forw_packet_aggr->skb, packet_len);
+ memcpy(skb_buff, packet_buff, packet_len);
+ forw_packet_aggr->packet_len += packet_len;
+ forw_packet_aggr->num_packets++;
+
+ /* save packet direct link flag status */
+ if (direct_link)
+ forw_packet_aggr->direct_link_flags |=
+ (1 << forw_packet_aggr->num_packets);
+}
+
+void add_bat_packet_to_list(struct bat_priv *bat_priv,
+ unsigned char *packet_buff, int packet_len,
+ struct batman_if *if_incoming, char own_packet,
+ unsigned long send_time)
+{
+ /**
+ * _aggr -> pointer to the packet we want to aggregate with
+ * _pos -> pointer to the position in the queue
+ */
+ struct forw_packet *forw_packet_aggr = NULL, *forw_packet_pos = NULL;
+ struct hlist_node *tmp_node;
+ struct batman_packet *batman_packet =
+ (struct batman_packet *)packet_buff;
+ bool direct_link = batman_packet->flags & DIRECTLINK ? 1 : 0;
+
+ /* find position for the packet in the forward queue */
+ spin_lock_bh(&bat_priv->forw_bat_list_lock);
+ /* own packets are not to be aggregated */
+ if ((atomic_read(&bat_priv->aggregated_ogms)) && (!own_packet)) {
+ hlist_for_each_entry(forw_packet_pos, tmp_node,
+ &bat_priv->forw_bat_list, list) {
+ if (can_aggregate_with(batman_packet,
+ packet_len,
+ send_time,
+ direct_link,
+ if_incoming,
+ forw_packet_pos)) {
+ forw_packet_aggr = forw_packet_pos;
+ break;
+ }
+ }
+ }
+
+ /* nothing to aggregate with - either aggregation disabled or no
+ * suitable aggregation packet found */
+ if (!forw_packet_aggr) {
+ /* the following section can run without the lock */
+ spin_unlock_bh(&bat_priv->forw_bat_list_lock);
+
+ /**
+ * if we could not aggregate this packet with one of the others
+ * we hold it back for a while, so that it might be aggregated
+ * later on
+ */
+ if ((!own_packet) &&
+ (atomic_read(&bat_priv->aggregated_ogms)))
+ send_time += msecs_to_jiffies(MAX_AGGREGATION_MS);
+
+ new_aggregated_packet(packet_buff, packet_len,
+ send_time, direct_link,
+ if_incoming, own_packet);
+ } else {
+ aggregate(forw_packet_aggr,
+ packet_buff, packet_len,
+ direct_link);
+ spin_unlock_bh(&bat_priv->forw_bat_list_lock);
+ }
+}
+
+/* unpack the aggregated packets and process them one by one */
+void receive_aggr_bat_packet(struct ethhdr *ethhdr, unsigned char *packet_buff,
+ int packet_len, struct batman_if *if_incoming)
+{
+ struct batman_packet *batman_packet;
+ int buff_pos = 0;
+ unsigned char *hna_buff;
+
+ batman_packet = (struct batman_packet *)packet_buff;
+
+ do {
+ /* network to host order for our 32bit seqno, and the
+ orig_interval. */
+ batman_packet->seqno = ntohl(batman_packet->seqno);
+
+ hna_buff = packet_buff + buff_pos + BAT_PACKET_LEN;
+ receive_bat_packet(ethhdr, batman_packet,
+ hna_buff, hna_len(batman_packet),
+ if_incoming);
+
+ buff_pos += BAT_PACKET_LEN + hna_len(batman_packet);
+ batman_packet = (struct batman_packet *)
+ (packet_buff + buff_pos);
+ } while (aggregated_packet(buff_pos, packet_len,
+ batman_packet->num_hna));
+}
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_AGGREGATION_H_
+#define _NET_BATMAN_ADV_AGGREGATION_H_
+
+#include "main.h"
+
+/* is there another aggregated packet here? */
+static inline int aggregated_packet(int buff_pos, int packet_len, int num_hna)
+{
+ int next_buff_pos = buff_pos + BAT_PACKET_LEN + (num_hna * ETH_ALEN);
+
+ return (next_buff_pos <= packet_len) &&
+ (next_buff_pos <= MAX_AGGREGATION_BYTES);
+}
+
+void add_bat_packet_to_list(struct bat_priv *bat_priv,
+ unsigned char *packet_buff, int packet_len,
+ struct batman_if *if_incoming, char own_packet,
+ unsigned long send_time);
+void receive_aggr_bat_packet(struct ethhdr *ethhdr, unsigned char *packet_buff,
+ int packet_len, struct batman_if *if_incoming);
+
+#endif /* _NET_BATMAN_ADV_AGGREGATION_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+
+#include <linux/debugfs.h>
+
+#include "bat_debugfs.h"
+#include "translation-table.h"
+#include "originator.h"
+#include "hard-interface.h"
+#include "gateway_common.h"
+#include "gateway_client.h"
+#include "soft-interface.h"
+#include "vis.h"
+#include "icmp_socket.h"
+
+static struct dentry *bat_debugfs;
+
+#ifdef CONFIG_BATMAN_ADV_DEBUG
+#define LOG_BUFF_MASK (log_buff_len-1)
+#define LOG_BUFF(idx) (debug_log->log_buff[(idx) & LOG_BUFF_MASK])
+
+static int log_buff_len = LOG_BUF_LEN;
+
+static void emit_log_char(struct debug_log *debug_log, char c)
+{
+ LOG_BUFF(debug_log->log_end) = c;
+ debug_log->log_end++;
+
+ if (debug_log->log_end - debug_log->log_start > log_buff_len)
+ debug_log->log_start = debug_log->log_end - log_buff_len;
+}
+
+static int fdebug_log(struct debug_log *debug_log, char *fmt, ...)
+{
+ int printed_len;
+ va_list args;
+ static char debug_log_buf[256];
+ char *p;
+
+ if (!debug_log)
+ return 0;
+
+ spin_lock_bh(&debug_log->lock);
+ va_start(args, fmt);
+ printed_len = vscnprintf(debug_log_buf, sizeof(debug_log_buf),
+ fmt, args);
+ va_end(args);
+
+ for (p = debug_log_buf; *p != 0; p++)
+ emit_log_char(debug_log, *p);
+
+ spin_unlock_bh(&debug_log->lock);
+
+ wake_up(&debug_log->queue_wait);
+
+ return 0;
+}
+
+int debug_log(struct bat_priv *bat_priv, char *fmt, ...)
+{
+ va_list args;
+ char tmp_log_buf[256];
+
+ va_start(args, fmt);
+ vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args);
+ fdebug_log(bat_priv->debug_log, "[%10u] %s",
+ (jiffies / HZ), tmp_log_buf);
+ va_end(args);
+
+ return 0;
+}
+
+static int log_open(struct inode *inode, struct file *file)
+{
+ nonseekable_open(inode, file);
+ file->private_data = inode->i_private;
+ inc_module_count();
+ return 0;
+}
+
+static int log_release(struct inode *inode, struct file *file)
+{
+ dec_module_count();
+ return 0;
+}
+
+static ssize_t log_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct bat_priv *bat_priv = file->private_data;
+ struct debug_log *debug_log = bat_priv->debug_log;
+ int error, i = 0;
+ char c;
+
+ if ((file->f_flags & O_NONBLOCK) &&
+ !(debug_log->log_end - debug_log->log_start))
+ return -EAGAIN;
+
+ if ((!buf) || (count < 0))
+ return -EINVAL;
+
+ if (count == 0)
+ return 0;
+
+ if (!access_ok(VERIFY_WRITE, buf, count))
+ return -EFAULT;
+
+ error = wait_event_interruptible(debug_log->queue_wait,
+ (debug_log->log_start - debug_log->log_end));
+
+ if (error)
+ return error;
+
+ spin_lock_bh(&debug_log->lock);
+
+ while ((!error) && (i < count) &&
+ (debug_log->log_start != debug_log->log_end)) {
+ c = LOG_BUFF(debug_log->log_start);
+
+ debug_log->log_start++;
+
+ spin_unlock_bh(&debug_log->lock);
+
+ error = __put_user(c, buf);
+
+ spin_lock_bh(&debug_log->lock);
+
+ buf++;
+ i++;
+
+ }
+
+ spin_unlock_bh(&debug_log->lock);
+
+ if (!error)
+ return i;
+
+ return error;
+}
+
+static unsigned int log_poll(struct file *file, poll_table *wait)
+{
+ struct bat_priv *bat_priv = file->private_data;
+ struct debug_log *debug_log = bat_priv->debug_log;
+
+ poll_wait(file, &debug_log->queue_wait, wait);
+
+ if (debug_log->log_end - debug_log->log_start)
+ return POLLIN | POLLRDNORM;
+
+ return 0;
+}
+
+static const struct file_operations log_fops = {
+ .open = log_open,
+ .release = log_release,
+ .read = log_read,
+ .poll = log_poll,
+ .llseek = no_llseek,
+};
+
+static int debug_log_setup(struct bat_priv *bat_priv)
+{
+ struct dentry *d;
+
+ if (!bat_priv->debug_dir)
+ goto err;
+
+ bat_priv->debug_log = kzalloc(sizeof(struct debug_log), GFP_ATOMIC);
+ if (!bat_priv->debug_log)
+ goto err;
+
+ spin_lock_init(&bat_priv->debug_log->lock);
+ init_waitqueue_head(&bat_priv->debug_log->queue_wait);
+
+ d = debugfs_create_file("log", S_IFREG | S_IRUSR,
+ bat_priv->debug_dir, bat_priv, &log_fops);
+ if (d)
+ goto err;
+
+ return 0;
+
+err:
+ return 1;
+}
+
+static void debug_log_cleanup(struct bat_priv *bat_priv)
+{
+ kfree(bat_priv->debug_log);
+ bat_priv->debug_log = NULL;
+}
+#else /* CONFIG_BATMAN_ADV_DEBUG */
+static int debug_log_setup(struct bat_priv *bat_priv)
+{
+ bat_priv->debug_log = NULL;
+ return 0;
+}
+
+static void debug_log_cleanup(struct bat_priv *bat_priv)
+{
+ return;
+}
+#endif
+
+static int originators_open(struct inode *inode, struct file *file)
+{
+ struct net_device *net_dev = (struct net_device *)inode->i_private;
+ return single_open(file, orig_seq_print_text, net_dev);
+}
+
+static int gateways_open(struct inode *inode, struct file *file)
+{
+ struct net_device *net_dev = (struct net_device *)inode->i_private;
+ return single_open(file, gw_client_seq_print_text, net_dev);
+}
+
+static int softif_neigh_open(struct inode *inode, struct file *file)
+{
+ struct net_device *net_dev = (struct net_device *)inode->i_private;
+ return single_open(file, softif_neigh_seq_print_text, net_dev);
+}
+
+static int transtable_global_open(struct inode *inode, struct file *file)
+{
+ struct net_device *net_dev = (struct net_device *)inode->i_private;
+ return single_open(file, hna_global_seq_print_text, net_dev);
+}
+
+static int transtable_local_open(struct inode *inode, struct file *file)
+{
+ struct net_device *net_dev = (struct net_device *)inode->i_private;
+ return single_open(file, hna_local_seq_print_text, net_dev);
+}
+
+static int vis_data_open(struct inode *inode, struct file *file)
+{
+ struct net_device *net_dev = (struct net_device *)inode->i_private;
+ return single_open(file, vis_seq_print_text, net_dev);
+}
+
+struct bat_debuginfo {
+ struct attribute attr;
+ const struct file_operations fops;
+};
+
+#define BAT_DEBUGINFO(_name, _mode, _open) \
+struct bat_debuginfo bat_debuginfo_##_name = { \
+ .attr = { .name = __stringify(_name), \
+ .mode = _mode, }, \
+ .fops = { .owner = THIS_MODULE, \
+ .open = _open, \
+ .read = seq_read, \
+ .llseek = seq_lseek, \
+ .release = single_release, \
+ } \
+};
+
+static BAT_DEBUGINFO(originators, S_IRUGO, originators_open);
+static BAT_DEBUGINFO(gateways, S_IRUGO, gateways_open);
+static BAT_DEBUGINFO(softif_neigh, S_IRUGO, softif_neigh_open);
+static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open);
+static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open);
+static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open);
+
+static struct bat_debuginfo *mesh_debuginfos[] = {
+ &bat_debuginfo_originators,
+ &bat_debuginfo_gateways,
+ &bat_debuginfo_softif_neigh,
+ &bat_debuginfo_transtable_global,
+ &bat_debuginfo_transtable_local,
+ &bat_debuginfo_vis_data,
+ NULL,
+};
+
+void debugfs_init(void)
+{
+ bat_debugfs = debugfs_create_dir(DEBUGFS_BAT_SUBDIR, NULL);
+ if (bat_debugfs == ERR_PTR(-ENODEV))
+ bat_debugfs = NULL;
+}
+
+void debugfs_destroy(void)
+{
+ if (bat_debugfs) {
+ debugfs_remove_recursive(bat_debugfs);
+ bat_debugfs = NULL;
+ }
+}
+
+int debugfs_add_meshif(struct net_device *dev)
+{
+ struct bat_priv *bat_priv = netdev_priv(dev);
+ struct bat_debuginfo **bat_debug;
+ struct dentry *file;
+
+ if (!bat_debugfs)
+ goto out;
+
+ bat_priv->debug_dir = debugfs_create_dir(dev->name, bat_debugfs);
+ if (!bat_priv->debug_dir)
+ goto out;
+
+ bat_socket_setup(bat_priv);
+ debug_log_setup(bat_priv);
+
+ for (bat_debug = mesh_debuginfos; *bat_debug; ++bat_debug) {
+ file = debugfs_create_file(((*bat_debug)->attr).name,
+ S_IFREG | ((*bat_debug)->attr).mode,
+ bat_priv->debug_dir,
+ dev, &(*bat_debug)->fops);
+ if (!file) {
+ bat_err(dev, "Can't add debugfs file: %s/%s\n",
+ dev->name, ((*bat_debug)->attr).name);
+ goto rem_attr;
+ }
+ }
+
+ return 0;
+rem_attr:
+ debugfs_remove_recursive(bat_priv->debug_dir);
+ bat_priv->debug_dir = NULL;
+out:
+#ifdef CONFIG_DEBUG_FS
+ return -ENOMEM;
+#else
+ return 0;
+#endif /* CONFIG_DEBUG_FS */
+}
+
+void debugfs_del_meshif(struct net_device *dev)
+{
+ struct bat_priv *bat_priv = netdev_priv(dev);
+
+ debug_log_cleanup(bat_priv);
+
+ if (bat_debugfs) {
+ debugfs_remove_recursive(bat_priv->debug_dir);
+ bat_priv->debug_dir = NULL;
+ }
+}
--- /dev/null
+/*
+ * Copyright (C) 2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+
+#ifndef _NET_BATMAN_ADV_DEBUGFS_H_
+#define _NET_BATMAN_ADV_DEBUGFS_H_
+
+#define DEBUGFS_BAT_SUBDIR "batman_adv"
+
+void debugfs_init(void);
+void debugfs_destroy(void);
+int debugfs_add_meshif(struct net_device *dev);
+void debugfs_del_meshif(struct net_device *dev);
+
+#endif /* _NET_BATMAN_ADV_DEBUGFS_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "bat_sysfs.h"
+#include "translation-table.h"
+#include "originator.h"
+#include "hard-interface.h"
+#include "gateway_common.h"
+#include "gateway_client.h"
+#include "vis.h"
+
+#define to_dev(obj) container_of(obj, struct device, kobj)
+#define kobj_to_netdev(obj) to_net_dev(to_dev(obj->parent))
+#define kobj_to_batpriv(obj) netdev_priv(kobj_to_netdev(obj))
+
+/* Use this, if you have customized show and store functions */
+#define BAT_ATTR(_name, _mode, _show, _store) \
+struct bat_attribute bat_attr_##_name = { \
+ .attr = {.name = __stringify(_name), \
+ .mode = _mode }, \
+ .show = _show, \
+ .store = _store, \
+};
+
+#define BAT_ATTR_STORE_BOOL(_name, _post_func) \
+ssize_t store_##_name(struct kobject *kobj, struct attribute *attr, \
+ char *buff, size_t count) \
+{ \
+ struct net_device *net_dev = kobj_to_netdev(kobj); \
+ struct bat_priv *bat_priv = netdev_priv(net_dev); \
+ return __store_bool_attr(buff, count, _post_func, attr, \
+ &bat_priv->_name, net_dev); \
+}
+
+#define BAT_ATTR_SHOW_BOOL(_name) \
+ssize_t show_##_name(struct kobject *kobj, struct attribute *attr, \
+ char *buff) \
+{ \
+ struct bat_priv *bat_priv = kobj_to_batpriv(kobj); \
+ return sprintf(buff, "%s\n", \
+ atomic_read(&bat_priv->_name) == 0 ? \
+ "disabled" : "enabled"); \
+} \
+
+/* Use this, if you are going to turn a [name] in bat_priv on or off */
+#define BAT_ATTR_BOOL(_name, _mode, _post_func) \
+ static BAT_ATTR_STORE_BOOL(_name, _post_func) \
+ static BAT_ATTR_SHOW_BOOL(_name) \
+ static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
+
+
+#define BAT_ATTR_STORE_UINT(_name, _min, _max, _post_func) \
+ssize_t store_##_name(struct kobject *kobj, struct attribute *attr, \
+ char *buff, size_t count) \
+{ \
+ struct net_device *net_dev = kobj_to_netdev(kobj); \
+ struct bat_priv *bat_priv = netdev_priv(net_dev); \
+ return __store_uint_attr(buff, count, _min, _max, _post_func, \
+ attr, &bat_priv->_name, net_dev); \
+}
+
+#define BAT_ATTR_SHOW_UINT(_name) \
+ssize_t show_##_name(struct kobject *kobj, struct attribute *attr, \
+ char *buff) \
+{ \
+ struct bat_priv *bat_priv = kobj_to_batpriv(kobj); \
+ return sprintf(buff, "%i\n", atomic_read(&bat_priv->_name)); \
+} \
+
+/* Use this, if you are going to set [name] in bat_priv to unsigned integer
+ * values only */
+#define BAT_ATTR_UINT(_name, _mode, _min, _max, _post_func) \
+ static BAT_ATTR_STORE_UINT(_name, _min, _max, _post_func) \
+ static BAT_ATTR_SHOW_UINT(_name) \
+ static BAT_ATTR(_name, _mode, show_##_name, store_##_name)
+
+
+static int store_bool_attr(char *buff, size_t count,
+ struct net_device *net_dev,
+ char *attr_name, atomic_t *attr)
+{
+ int enabled = -1;
+
+ if (buff[count - 1] == '\n')
+ buff[count - 1] = '\0';
+
+ if ((strncmp(buff, "1", 2) == 0) ||
+ (strncmp(buff, "enable", 7) == 0) ||
+ (strncmp(buff, "enabled", 8) == 0))
+ enabled = 1;
+
+ if ((strncmp(buff, "0", 2) == 0) ||
+ (strncmp(buff, "disable", 8) == 0) ||
+ (strncmp(buff, "disabled", 9) == 0))
+ enabled = 0;
+
+ if (enabled < 0) {
+ bat_info(net_dev,
+ "%s: Invalid parameter received: %s\n",
+ attr_name, buff);
+ return -EINVAL;
+ }
+
+ if (atomic_read(attr) == enabled)
+ return count;
+
+ bat_info(net_dev, "%s: Changing from: %s to: %s\n", attr_name,
+ atomic_read(attr) == 1 ? "enabled" : "disabled",
+ enabled == 1 ? "enabled" : "disabled");
+
+ atomic_set(attr, (unsigned)enabled);
+ return count;
+}
+
+static inline ssize_t __store_bool_attr(char *buff, size_t count,
+ void (*post_func)(struct net_device *),
+ struct attribute *attr,
+ atomic_t *attr_store, struct net_device *net_dev)
+{
+ int ret;
+
+ ret = store_bool_attr(buff, count, net_dev, (char *)attr->name,
+ attr_store);
+ if (post_func && ret)
+ post_func(net_dev);
+
+ return ret;
+}
+
+static int store_uint_attr(char *buff, size_t count,
+ struct net_device *net_dev, char *attr_name,
+ unsigned int min, unsigned int max, atomic_t *attr)
+{
+ unsigned long uint_val;
+ int ret;
+
+ ret = strict_strtoul(buff, 10, &uint_val);
+ if (ret) {
+ bat_info(net_dev,
+ "%s: Invalid parameter received: %s\n",
+ attr_name, buff);
+ return -EINVAL;
+ }
+
+ if (uint_val < min) {
+ bat_info(net_dev, "%s: Value is too small: %lu min: %u\n",
+ attr_name, uint_val, min);
+ return -EINVAL;
+ }
+
+ if (uint_val > max) {
+ bat_info(net_dev, "%s: Value is too big: %lu max: %u\n",
+ attr_name, uint_val, max);
+ return -EINVAL;
+ }
+
+ if (atomic_read(attr) == uint_val)
+ return count;
+
+ bat_info(net_dev, "%s: Changing from: %i to: %lu\n",
+ attr_name, atomic_read(attr), uint_val);
+
+ atomic_set(attr, uint_val);
+ return count;
+}
+
+static inline ssize_t __store_uint_attr(char *buff, size_t count,
+ int min, int max,
+ void (*post_func)(struct net_device *),
+ struct attribute *attr,
+ atomic_t *attr_store, struct net_device *net_dev)
+{
+ int ret;
+
+ ret = store_uint_attr(buff, count, net_dev, (char *)attr->name,
+ min, max, attr_store);
+ if (post_func && ret)
+ post_func(net_dev);
+
+ return ret;
+}
+
+static ssize_t show_vis_mode(struct kobject *kobj, struct attribute *attr,
+ char *buff)
+{
+ struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
+ int vis_mode = atomic_read(&bat_priv->vis_mode);
+
+ return sprintf(buff, "%s\n",
+ vis_mode == VIS_TYPE_CLIENT_UPDATE ?
+ "client" : "server");
+}
+
+static ssize_t store_vis_mode(struct kobject *kobj, struct attribute *attr,
+ char *buff, size_t count)
+{
+ struct net_device *net_dev = kobj_to_netdev(kobj);
+ struct bat_priv *bat_priv = netdev_priv(net_dev);
+ unsigned long val;
+ int ret, vis_mode_tmp = -1;
+
+ ret = strict_strtoul(buff, 10, &val);
+
+ if (((count == 2) && (!ret) && (val == VIS_TYPE_CLIENT_UPDATE)) ||
+ (strncmp(buff, "client", 6) == 0) ||
+ (strncmp(buff, "off", 3) == 0))
+ vis_mode_tmp = VIS_TYPE_CLIENT_UPDATE;
+
+ if (((count == 2) && (!ret) && (val == VIS_TYPE_SERVER_SYNC)) ||
+ (strncmp(buff, "server", 6) == 0))
+ vis_mode_tmp = VIS_TYPE_SERVER_SYNC;
+
+ if (vis_mode_tmp < 0) {
+ if (buff[count - 1] == '\n')
+ buff[count - 1] = '\0';
+
+ bat_info(net_dev,
+ "Invalid parameter for 'vis mode' setting received: "
+ "%s\n", buff);
+ return -EINVAL;
+ }
+
+ if (atomic_read(&bat_priv->vis_mode) == vis_mode_tmp)
+ return count;
+
+ bat_info(net_dev, "Changing vis mode from: %s to: %s\n",
+ atomic_read(&bat_priv->vis_mode) == VIS_TYPE_CLIENT_UPDATE ?
+ "client" : "server", vis_mode_tmp == VIS_TYPE_CLIENT_UPDATE ?
+ "client" : "server");
+
+ atomic_set(&bat_priv->vis_mode, (unsigned)vis_mode_tmp);
+ return count;
+}
+
+static void post_gw_deselect(struct net_device *net_dev)
+{
+ struct bat_priv *bat_priv = netdev_priv(net_dev);
+ gw_deselect(bat_priv);
+}
+
+static ssize_t show_gw_mode(struct kobject *kobj, struct attribute *attr,
+ char *buff)
+{
+ struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
+ int bytes_written;
+
+ switch (atomic_read(&bat_priv->gw_mode)) {
+ case GW_MODE_CLIENT:
+ bytes_written = sprintf(buff, "%s\n", GW_MODE_CLIENT_NAME);
+ break;
+ case GW_MODE_SERVER:
+ bytes_written = sprintf(buff, "%s\n", GW_MODE_SERVER_NAME);
+ break;
+ default:
+ bytes_written = sprintf(buff, "%s\n", GW_MODE_OFF_NAME);
+ break;
+ }
+
+ return bytes_written;
+}
+
+static ssize_t store_gw_mode(struct kobject *kobj, struct attribute *attr,
+ char *buff, size_t count)
+{
+ struct net_device *net_dev = kobj_to_netdev(kobj);
+ struct bat_priv *bat_priv = netdev_priv(net_dev);
+ char *curr_gw_mode_str;
+ int gw_mode_tmp = -1;
+
+ if (buff[count - 1] == '\n')
+ buff[count - 1] = '\0';
+
+ if (strncmp(buff, GW_MODE_OFF_NAME, strlen(GW_MODE_OFF_NAME)) == 0)
+ gw_mode_tmp = GW_MODE_OFF;
+
+ if (strncmp(buff, GW_MODE_CLIENT_NAME,
+ strlen(GW_MODE_CLIENT_NAME)) == 0)
+ gw_mode_tmp = GW_MODE_CLIENT;
+
+ if (strncmp(buff, GW_MODE_SERVER_NAME,
+ strlen(GW_MODE_SERVER_NAME)) == 0)
+ gw_mode_tmp = GW_MODE_SERVER;
+
+ if (gw_mode_tmp < 0) {
+ bat_info(net_dev,
+ "Invalid parameter for 'gw mode' setting received: "
+ "%s\n", buff);
+ return -EINVAL;
+ }
+
+ if (atomic_read(&bat_priv->gw_mode) == gw_mode_tmp)
+ return count;
+
+ switch (atomic_read(&bat_priv->gw_mode)) {
+ case GW_MODE_CLIENT:
+ curr_gw_mode_str = GW_MODE_CLIENT_NAME;
+ break;
+ case GW_MODE_SERVER:
+ curr_gw_mode_str = GW_MODE_SERVER_NAME;
+ break;
+ default:
+ curr_gw_mode_str = GW_MODE_OFF_NAME;
+ break;
+ }
+
+ bat_info(net_dev, "Changing gw mode from: %s to: %s\n",
+ curr_gw_mode_str, buff);
+
+ gw_deselect(bat_priv);
+ atomic_set(&bat_priv->gw_mode, (unsigned)gw_mode_tmp);
+ return count;
+}
+
+static ssize_t show_gw_bwidth(struct kobject *kobj, struct attribute *attr,
+ char *buff)
+{
+ struct bat_priv *bat_priv = kobj_to_batpriv(kobj);
+ int down, up;
+ int gw_bandwidth = atomic_read(&bat_priv->gw_bandwidth);
+
+ gw_bandwidth_to_kbit(gw_bandwidth, &down, &up);
+ return sprintf(buff, "%i%s/%i%s\n",
+ (down > 2048 ? down / 1024 : down),
+ (down > 2048 ? "MBit" : "KBit"),
+ (up > 2048 ? up / 1024 : up),
+ (up > 2048 ? "MBit" : "KBit"));
+}
+
+static ssize_t store_gw_bwidth(struct kobject *kobj, struct attribute *attr,
+ char *buff, size_t count)
+{
+ struct net_device *net_dev = kobj_to_netdev(kobj);
+
+ if (buff[count - 1] == '\n')
+ buff[count - 1] = '\0';
+
+ return gw_bandwidth_set(net_dev, buff, count);
+}
+
+BAT_ATTR_BOOL(aggregated_ogms, S_IRUGO | S_IWUSR, NULL);
+BAT_ATTR_BOOL(bonding, S_IRUGO | S_IWUSR, NULL);
+BAT_ATTR_BOOL(fragmentation, S_IRUGO | S_IWUSR, update_min_mtu);
+static BAT_ATTR(vis_mode, S_IRUGO | S_IWUSR, show_vis_mode, store_vis_mode);
+static BAT_ATTR(gw_mode, S_IRUGO | S_IWUSR, show_gw_mode, store_gw_mode);
+BAT_ATTR_UINT(orig_interval, S_IRUGO | S_IWUSR, 2 * JITTER, INT_MAX, NULL);
+BAT_ATTR_UINT(hop_penalty, S_IRUGO | S_IWUSR, 0, TQ_MAX_VALUE, NULL);
+BAT_ATTR_UINT(gw_sel_class, S_IRUGO | S_IWUSR, 1, TQ_MAX_VALUE,
+ post_gw_deselect);
+static BAT_ATTR(gw_bandwidth, S_IRUGO | S_IWUSR, show_gw_bwidth,
+ store_gw_bwidth);
+#ifdef CONFIG_BATMAN_ADV_DEBUG
+BAT_ATTR_UINT(log_level, S_IRUGO | S_IWUSR, 0, 3, NULL);
+#endif
+
+static struct bat_attribute *mesh_attrs[] = {
+ &bat_attr_aggregated_ogms,
+ &bat_attr_bonding,
+ &bat_attr_fragmentation,
+ &bat_attr_vis_mode,
+ &bat_attr_gw_mode,
+ &bat_attr_orig_interval,
+ &bat_attr_hop_penalty,
+ &bat_attr_gw_sel_class,
+ &bat_attr_gw_bandwidth,
+#ifdef CONFIG_BATMAN_ADV_DEBUG
+ &bat_attr_log_level,
+#endif
+ NULL,
+};
+
+int sysfs_add_meshif(struct net_device *dev)
+{
+ struct kobject *batif_kobject = &dev->dev.kobj;
+ struct bat_priv *bat_priv = netdev_priv(dev);
+ struct bat_attribute **bat_attr;
+ int err;
+
+ bat_priv->mesh_obj = kobject_create_and_add(SYSFS_IF_MESH_SUBDIR,
+ batif_kobject);
+ if (!bat_priv->mesh_obj) {
+ bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
+ SYSFS_IF_MESH_SUBDIR);
+ goto out;
+ }
+
+ for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr) {
+ err = sysfs_create_file(bat_priv->mesh_obj,
+ &((*bat_attr)->attr));
+ if (err) {
+ bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
+ dev->name, SYSFS_IF_MESH_SUBDIR,
+ ((*bat_attr)->attr).name);
+ goto rem_attr;
+ }
+ }
+
+ return 0;
+
+rem_attr:
+ for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
+ sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
+
+ kobject_put(bat_priv->mesh_obj);
+ bat_priv->mesh_obj = NULL;
+out:
+ return -ENOMEM;
+}
+
+void sysfs_del_meshif(struct net_device *dev)
+{
+ struct bat_priv *bat_priv = netdev_priv(dev);
+ struct bat_attribute **bat_attr;
+
+ for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
+ sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
+
+ kobject_put(bat_priv->mesh_obj);
+ bat_priv->mesh_obj = NULL;
+}
+
+static ssize_t show_mesh_iface(struct kobject *kobj, struct attribute *attr,
+ char *buff)
+{
+ struct net_device *net_dev = kobj_to_netdev(kobj);
+ struct batman_if *batman_if = get_batman_if_by_netdev(net_dev);
+ ssize_t length;
+
+ if (!batman_if)
+ return 0;
+
+ length = sprintf(buff, "%s\n", batman_if->if_status == IF_NOT_IN_USE ?
+ "none" : batman_if->soft_iface->name);
+
+ kref_put(&batman_if->refcount, hardif_free_ref);
+
+ return length;
+}
+
+static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
+ char *buff, size_t count)
+{
+ struct net_device *net_dev = kobj_to_netdev(kobj);
+ struct batman_if *batman_if = get_batman_if_by_netdev(net_dev);
+ int status_tmp = -1;
+ int ret;
+
+ if (!batman_if)
+ return count;
+
+ if (buff[count - 1] == '\n')
+ buff[count - 1] = '\0';
+
+ if (strlen(buff) >= IFNAMSIZ) {
+ pr_err("Invalid parameter for 'mesh_iface' setting received: "
+ "interface name too long '%s'\n", buff);
+ kref_put(&batman_if->refcount, hardif_free_ref);
+ return -EINVAL;
+ }
+
+ if (strncmp(buff, "none", 4) == 0)
+ status_tmp = IF_NOT_IN_USE;
+ else
+ status_tmp = IF_I_WANT_YOU;
+
+ if ((batman_if->if_status == status_tmp) || ((batman_if->soft_iface) &&
+ (strncmp(batman_if->soft_iface->name, buff, IFNAMSIZ) == 0))) {
+ kref_put(&batman_if->refcount, hardif_free_ref);
+ return count;
+ }
+
+ if (status_tmp == IF_NOT_IN_USE) {
+ rtnl_lock();
+ hardif_disable_interface(batman_if);
+ rtnl_unlock();
+ kref_put(&batman_if->refcount, hardif_free_ref);
+ return count;
+ }
+
+ /* if the interface already is in use */
+ if (batman_if->if_status != IF_NOT_IN_USE) {
+ rtnl_lock();
+ hardif_disable_interface(batman_if);
+ rtnl_unlock();
+ }
+
+ ret = hardif_enable_interface(batman_if, buff);
+ kref_put(&batman_if->refcount, hardif_free_ref);
+
+ return ret;
+}
+
+static ssize_t show_iface_status(struct kobject *kobj, struct attribute *attr,
+ char *buff)
+{
+ struct net_device *net_dev = kobj_to_netdev(kobj);
+ struct batman_if *batman_if = get_batman_if_by_netdev(net_dev);
+ ssize_t length;
+
+ if (!batman_if)
+ return 0;
+
+ switch (batman_if->if_status) {
+ case IF_TO_BE_REMOVED:
+ length = sprintf(buff, "disabling\n");
+ break;
+ case IF_INACTIVE:
+ length = sprintf(buff, "inactive\n");
+ break;
+ case IF_ACTIVE:
+ length = sprintf(buff, "active\n");
+ break;
+ case IF_TO_BE_ACTIVATED:
+ length = sprintf(buff, "enabling\n");
+ break;
+ case IF_NOT_IN_USE:
+ default:
+ length = sprintf(buff, "not in use\n");
+ break;
+ }
+
+ kref_put(&batman_if->refcount, hardif_free_ref);
+
+ return length;
+}
+
+static BAT_ATTR(mesh_iface, S_IRUGO | S_IWUSR,
+ show_mesh_iface, store_mesh_iface);
+static BAT_ATTR(iface_status, S_IRUGO, show_iface_status, NULL);
+
+static struct bat_attribute *batman_attrs[] = {
+ &bat_attr_mesh_iface,
+ &bat_attr_iface_status,
+ NULL,
+};
+
+int sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
+{
+ struct kobject *hardif_kobject = &dev->dev.kobj;
+ struct bat_attribute **bat_attr;
+ int err;
+
+ *hardif_obj = kobject_create_and_add(SYSFS_IF_BAT_SUBDIR,
+ hardif_kobject);
+
+ if (!*hardif_obj) {
+ bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
+ SYSFS_IF_BAT_SUBDIR);
+ goto out;
+ }
+
+ for (bat_attr = batman_attrs; *bat_attr; ++bat_attr) {
+ err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
+ if (err) {
+ bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
+ dev->name, SYSFS_IF_BAT_SUBDIR,
+ ((*bat_attr)->attr).name);
+ goto rem_attr;
+ }
+ }
+
+ return 0;
+
+rem_attr:
+ for (bat_attr = batman_attrs; *bat_attr; ++bat_attr)
+ sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
+out:
+ return -ENOMEM;
+}
+
+void sysfs_del_hardif(struct kobject **hardif_obj)
+{
+ kobject_put(*hardif_obj);
+ *hardif_obj = NULL;
+}
--- /dev/null
+/*
+ * Copyright (C) 2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+
+#ifndef _NET_BATMAN_ADV_SYSFS_H_
+#define _NET_BATMAN_ADV_SYSFS_H_
+
+#define SYSFS_IF_MESH_SUBDIR "mesh"
+#define SYSFS_IF_BAT_SUBDIR "batman_adv"
+
+struct bat_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct kobject *kobj, struct attribute *attr,
+ char *buf);
+ ssize_t (*store)(struct kobject *kobj, struct attribute *attr,
+ char *buf, size_t count);
+};
+
+int sysfs_add_meshif(struct net_device *dev);
+void sysfs_del_meshif(struct net_device *dev);
+int sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev);
+void sysfs_del_hardif(struct kobject **hardif_obj);
+
+#endif /* _NET_BATMAN_ADV_SYSFS_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2006-2010 B.A.T.M.A.N. contributors:
+ *
+ * Simon Wunderlich, Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "bitarray.h"
+
+#include <linux/bitops.h>
+
+/* returns true if the corresponding bit in the given seq_bits indicates true
+ * and curr_seqno is within range of last_seqno */
+uint8_t get_bit_status(unsigned long *seq_bits, uint32_t last_seqno,
+ uint32_t curr_seqno)
+{
+ int32_t diff, word_offset, word_num;
+
+ diff = last_seqno - curr_seqno;
+ if (diff < 0 || diff >= TQ_LOCAL_WINDOW_SIZE) {
+ return 0;
+ } else {
+ /* which word */
+ word_num = (last_seqno - curr_seqno) / WORD_BIT_SIZE;
+ /* which position in the selected word */
+ word_offset = (last_seqno - curr_seqno) % WORD_BIT_SIZE;
+
+ if (test_bit(word_offset, &seq_bits[word_num]))
+ return 1;
+ else
+ return 0;
+ }
+}
+
+/* turn corresponding bit on, so we can remember that we got the packet */
+void bit_mark(unsigned long *seq_bits, int32_t n)
+{
+ int32_t word_offset, word_num;
+
+ /* if too old, just drop it */
+ if (n < 0 || n >= TQ_LOCAL_WINDOW_SIZE)
+ return;
+
+ /* which word */
+ word_num = n / WORD_BIT_SIZE;
+ /* which position in the selected word */
+ word_offset = n % WORD_BIT_SIZE;
+
+ set_bit(word_offset, &seq_bits[word_num]); /* turn the position on */
+}
+
+/* shift the packet array by n places. */
+static void bit_shift(unsigned long *seq_bits, int32_t n)
+{
+ int32_t word_offset, word_num;
+ int32_t i;
+
+ if (n <= 0 || n >= TQ_LOCAL_WINDOW_SIZE)
+ return;
+
+ word_offset = n % WORD_BIT_SIZE;/* shift how much inside each word */
+ word_num = n / WORD_BIT_SIZE; /* shift over how much (full) words */
+
+ for (i = NUM_WORDS - 1; i > word_num; i--) {
+ /* going from old to new, so we don't overwrite the data we copy
+ * from.
+ *
+ * left is high, right is low: FEDC BA98 7654 3210
+ * ^^ ^^
+ * vvvv
+ * ^^^^ = from, vvvvv =to, we'd have word_num==1 and
+ * word_offset==WORD_BIT_SIZE/2 ????? in this example.
+ * (=24 bits)
+ *
+ * our desired output would be: 9876 5432 1000 0000
+ * */
+
+ seq_bits[i] =
+ (seq_bits[i - word_num] << word_offset) +
+ /* take the lower port from the left half, shift it left
+ * to its final position */
+ (seq_bits[i - word_num - 1] >>
+ (WORD_BIT_SIZE-word_offset));
+ /* and the upper part of the right half and shift it left to
+ * it's position */
+ /* for our example that would be: word[0] = 9800 + 0076 =
+ * 9876 */
+ }
+ /* now for our last word, i==word_num, we only have the it's "left"
+ * half. that's the 1000 word in our example.*/
+
+ seq_bits[i] = (seq_bits[i - word_num] << word_offset);
+
+ /* pad the rest with 0, if there is anything */
+ i--;
+
+ for (; i >= 0; i--)
+ seq_bits[i] = 0;
+}
+
+static void bit_reset_window(unsigned long *seq_bits)
+{
+ int i;
+ for (i = 0; i < NUM_WORDS; i++)
+ seq_bits[i] = 0;
+}
+
+
+/* receive and process one packet within the sequence number window.
+ *
+ * returns:
+ * 1 if the window was moved (either new or very old)
+ * 0 if the window was not moved/shifted.
+ */
+char bit_get_packet(void *priv, unsigned long *seq_bits,
+ int32_t seq_num_diff, int8_t set_mark)
+{
+ struct bat_priv *bat_priv = (struct bat_priv *)priv;
+
+ /* sequence number is slightly older. We already got a sequence number
+ * higher than this one, so we just mark it. */
+
+ if ((seq_num_diff <= 0) && (seq_num_diff > -TQ_LOCAL_WINDOW_SIZE)) {
+ if (set_mark)
+ bit_mark(seq_bits, -seq_num_diff);
+ return 0;
+ }
+
+ /* sequence number is slightly newer, so we shift the window and
+ * set the mark if required */
+
+ if ((seq_num_diff > 0) && (seq_num_diff < TQ_LOCAL_WINDOW_SIZE)) {
+ bit_shift(seq_bits, seq_num_diff);
+
+ if (set_mark)
+ bit_mark(seq_bits, 0);
+ return 1;
+ }
+
+ /* sequence number is much newer, probably missed a lot of packets */
+
+ if ((seq_num_diff >= TQ_LOCAL_WINDOW_SIZE)
+ || (seq_num_diff < EXPECTED_SEQNO_RANGE)) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "We missed a lot of packets (%i) !\n",
+ seq_num_diff - 1);
+ bit_reset_window(seq_bits);
+ if (set_mark)
+ bit_mark(seq_bits, 0);
+ return 1;
+ }
+
+ /* received a much older packet. The other host either restarted
+ * or the old packet got delayed somewhere in the network. The
+ * packet should be dropped without calling this function if the
+ * seqno window is protected. */
+
+ if ((seq_num_diff <= -TQ_LOCAL_WINDOW_SIZE)
+ || (seq_num_diff >= EXPECTED_SEQNO_RANGE)) {
+
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Other host probably restarted!\n");
+
+ bit_reset_window(seq_bits);
+ if (set_mark)
+ bit_mark(seq_bits, 0);
+
+ return 1;
+ }
+
+ /* never reached */
+ return 0;
+}
+
+/* count the hamming weight, how many good packets did we receive? just count
+ * the 1's.
+ */
+int bit_packet_count(unsigned long *seq_bits)
+{
+ int i, hamming = 0;
+
+ for (i = 0; i < NUM_WORDS; i++)
+ hamming += hweight_long(seq_bits[i]);
+
+ return hamming;
+}
--- /dev/null
+/*
+ * Copyright (C) 2006-2010 B.A.T.M.A.N. contributors:
+ *
+ * Simon Wunderlich, Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_BITARRAY_H_
+#define _NET_BATMAN_ADV_BITARRAY_H_
+
+#define WORD_BIT_SIZE (sizeof(unsigned long) * 8)
+
+/* returns true if the corresponding bit in the given seq_bits indicates true
+ * and curr_seqno is within range of last_seqno */
+uint8_t get_bit_status(unsigned long *seq_bits, uint32_t last_seqno,
+ uint32_t curr_seqno);
+
+/* turn corresponding bit on, so we can remember that we got the packet */
+void bit_mark(unsigned long *seq_bits, int32_t n);
+
+
+/* receive and process one packet, returns 1 if received seq_num is considered
+ * new, 0 if old */
+char bit_get_packet(void *priv, unsigned long *seq_bits,
+ int32_t seq_num_diff, int8_t set_mark);
+
+/* count the hamming weight, how many good packets did we receive? */
+int bit_packet_count(unsigned long *seq_bits);
+
+#endif /* _NET_BATMAN_ADV_BITARRAY_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2009-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "gateway_client.h"
+#include "gateway_common.h"
+#include "hard-interface.h"
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/udp.h>
+#include <linux/if_vlan.h>
+
+static void gw_node_free_ref(struct kref *refcount)
+{
+ struct gw_node *gw_node;
+
+ gw_node = container_of(refcount, struct gw_node, refcount);
+ kfree(gw_node);
+}
+
+static void gw_node_free_rcu(struct rcu_head *rcu)
+{
+ struct gw_node *gw_node;
+
+ gw_node = container_of(rcu, struct gw_node, rcu);
+ kref_put(&gw_node->refcount, gw_node_free_ref);
+}
+
+void *gw_get_selected(struct bat_priv *bat_priv)
+{
+ struct gw_node *curr_gateway_tmp = bat_priv->curr_gw;
+
+ if (!curr_gateway_tmp)
+ return NULL;
+
+ return curr_gateway_tmp->orig_node;
+}
+
+void gw_deselect(struct bat_priv *bat_priv)
+{
+ struct gw_node *gw_node = bat_priv->curr_gw;
+
+ bat_priv->curr_gw = NULL;
+
+ if (gw_node)
+ kref_put(&gw_node->refcount, gw_node_free_ref);
+}
+
+static struct gw_node *gw_select(struct bat_priv *bat_priv,
+ struct gw_node *new_gw_node)
+{
+ struct gw_node *curr_gw_node = bat_priv->curr_gw;
+
+ if (new_gw_node)
+ kref_get(&new_gw_node->refcount);
+
+ bat_priv->curr_gw = new_gw_node;
+ return curr_gw_node;
+}
+
+void gw_election(struct bat_priv *bat_priv)
+{
+ struct hlist_node *node;
+ struct gw_node *gw_node, *curr_gw_tmp = NULL, *old_gw_node = NULL;
+ uint8_t max_tq = 0;
+ uint32_t max_gw_factor = 0, tmp_gw_factor = 0;
+ int down, up;
+
+ /**
+ * The batman daemon checks here if we already passed a full originator
+ * cycle in order to make sure we don't choose the first gateway we
+ * hear about. This check is based on the daemon's uptime which we
+ * don't have.
+ **/
+ if (atomic_read(&bat_priv->gw_mode) != GW_MODE_CLIENT)
+ return;
+
+ if (bat_priv->curr_gw)
+ return;
+
+ rcu_read_lock();
+ if (hlist_empty(&bat_priv->gw_list)) {
+ rcu_read_unlock();
+
+ if (bat_priv->curr_gw) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Removing selected gateway - "
+ "no gateway in range\n");
+ gw_deselect(bat_priv);
+ }
+
+ return;
+ }
+
+ hlist_for_each_entry_rcu(gw_node, node, &bat_priv->gw_list, list) {
+ if (!gw_node->orig_node->router)
+ continue;
+
+ if (gw_node->deleted)
+ continue;
+
+ switch (atomic_read(&bat_priv->gw_sel_class)) {
+ case 1: /* fast connection */
+ gw_bandwidth_to_kbit(gw_node->orig_node->gw_flags,
+ &down, &up);
+
+ tmp_gw_factor = (gw_node->orig_node->router->tq_avg *
+ gw_node->orig_node->router->tq_avg *
+ down * 100 * 100) /
+ (TQ_LOCAL_WINDOW_SIZE *
+ TQ_LOCAL_WINDOW_SIZE * 64);
+
+ if ((tmp_gw_factor > max_gw_factor) ||
+ ((tmp_gw_factor == max_gw_factor) &&
+ (gw_node->orig_node->router->tq_avg > max_tq)))
+ curr_gw_tmp = gw_node;
+ break;
+
+ default: /**
+ * 2: stable connection (use best statistic)
+ * 3: fast-switch (use best statistic but change as
+ * soon as a better gateway appears)
+ * XX: late-switch (use best statistic but change as
+ * soon as a better gateway appears which has
+ * $routing_class more tq points)
+ **/
+ if (gw_node->orig_node->router->tq_avg > max_tq)
+ curr_gw_tmp = gw_node;
+ break;
+ }
+
+ if (gw_node->orig_node->router->tq_avg > max_tq)
+ max_tq = gw_node->orig_node->router->tq_avg;
+
+ if (tmp_gw_factor > max_gw_factor)
+ max_gw_factor = tmp_gw_factor;
+ }
+
+ if (bat_priv->curr_gw != curr_gw_tmp) {
+ if ((bat_priv->curr_gw) && (!curr_gw_tmp))
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Removing selected gateway - "
+ "no gateway in range\n");
+ else if ((!bat_priv->curr_gw) && (curr_gw_tmp))
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Adding route to gateway %pM "
+ "(gw_flags: %i, tq: %i)\n",
+ curr_gw_tmp->orig_node->orig,
+ curr_gw_tmp->orig_node->gw_flags,
+ curr_gw_tmp->orig_node->router->tq_avg);
+ else
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Changing route to gateway %pM "
+ "(gw_flags: %i, tq: %i)\n",
+ curr_gw_tmp->orig_node->orig,
+ curr_gw_tmp->orig_node->gw_flags,
+ curr_gw_tmp->orig_node->router->tq_avg);
+
+ old_gw_node = gw_select(bat_priv, curr_gw_tmp);
+ }
+
+ rcu_read_unlock();
+
+ /* the kfree() has to be outside of the rcu lock */
+ if (old_gw_node)
+ kref_put(&old_gw_node->refcount, gw_node_free_ref);
+}
+
+void gw_check_election(struct bat_priv *bat_priv, struct orig_node *orig_node)
+{
+ struct gw_node *curr_gateway_tmp = bat_priv->curr_gw;
+ uint8_t gw_tq_avg, orig_tq_avg;
+
+ if (!curr_gateway_tmp)
+ return;
+
+ if (!curr_gateway_tmp->orig_node)
+ goto deselect;
+
+ if (!curr_gateway_tmp->orig_node->router)
+ goto deselect;
+
+ /* this node already is the gateway */
+ if (curr_gateway_tmp->orig_node == orig_node)
+ return;
+
+ if (!orig_node->router)
+ return;
+
+ gw_tq_avg = curr_gateway_tmp->orig_node->router->tq_avg;
+ orig_tq_avg = orig_node->router->tq_avg;
+
+ /* the TQ value has to be better */
+ if (orig_tq_avg < gw_tq_avg)
+ return;
+
+ /**
+ * if the routing class is greater than 3 the value tells us how much
+ * greater the TQ value of the new gateway must be
+ **/
+ if ((atomic_read(&bat_priv->gw_sel_class) > 3) &&
+ (orig_tq_avg - gw_tq_avg < atomic_read(&bat_priv->gw_sel_class)))
+ return;
+
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Restarting gateway selection: better gateway found (tq curr: "
+ "%i, tq new: %i)\n",
+ gw_tq_avg, orig_tq_avg);
+
+deselect:
+ gw_deselect(bat_priv);
+}
+
+static void gw_node_add(struct bat_priv *bat_priv,
+ struct orig_node *orig_node, uint8_t new_gwflags)
+{
+ struct gw_node *gw_node;
+ int down, up;
+
+ gw_node = kmalloc(sizeof(struct gw_node), GFP_ATOMIC);
+ if (!gw_node)
+ return;
+
+ memset(gw_node, 0, sizeof(struct gw_node));
+ INIT_HLIST_NODE(&gw_node->list);
+ gw_node->orig_node = orig_node;
+ kref_init(&gw_node->refcount);
+
+ spin_lock_bh(&bat_priv->gw_list_lock);
+ hlist_add_head_rcu(&gw_node->list, &bat_priv->gw_list);
+ spin_unlock_bh(&bat_priv->gw_list_lock);
+
+ gw_bandwidth_to_kbit(new_gwflags, &down, &up);
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Found new gateway %pM -> gw_class: %i - %i%s/%i%s\n",
+ orig_node->orig, new_gwflags,
+ (down > 2048 ? down / 1024 : down),
+ (down > 2048 ? "MBit" : "KBit"),
+ (up > 2048 ? up / 1024 : up),
+ (up > 2048 ? "MBit" : "KBit"));
+}
+
+void gw_node_update(struct bat_priv *bat_priv,
+ struct orig_node *orig_node, uint8_t new_gwflags)
+{
+ struct hlist_node *node;
+ struct gw_node *gw_node;
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(gw_node, node, &bat_priv->gw_list, list) {
+ if (gw_node->orig_node != orig_node)
+ continue;
+
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Gateway class of originator %pM changed from "
+ "%i to %i\n",
+ orig_node->orig, gw_node->orig_node->gw_flags,
+ new_gwflags);
+
+ gw_node->deleted = 0;
+
+ if (new_gwflags == 0) {
+ gw_node->deleted = jiffies;
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Gateway %pM removed from gateway list\n",
+ orig_node->orig);
+
+ if (gw_node == bat_priv->curr_gw) {
+ rcu_read_unlock();
+ gw_deselect(bat_priv);
+ return;
+ }
+ }
+
+ rcu_read_unlock();
+ return;
+ }
+ rcu_read_unlock();
+
+ if (new_gwflags == 0)
+ return;
+
+ gw_node_add(bat_priv, orig_node, new_gwflags);
+}
+
+void gw_node_delete(struct bat_priv *bat_priv, struct orig_node *orig_node)
+{
+ return gw_node_update(bat_priv, orig_node, 0);
+}
+
+void gw_node_purge(struct bat_priv *bat_priv)
+{
+ struct gw_node *gw_node;
+ struct hlist_node *node, *node_tmp;
+ unsigned long timeout = 2 * PURGE_TIMEOUT * HZ;
+
+ spin_lock_bh(&bat_priv->gw_list_lock);
+
+ hlist_for_each_entry_safe(gw_node, node, node_tmp,
+ &bat_priv->gw_list, list) {
+ if (((!gw_node->deleted) ||
+ (time_before(jiffies, gw_node->deleted + timeout))) &&
+ atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE)
+ continue;
+
+ if (bat_priv->curr_gw == gw_node)
+ gw_deselect(bat_priv);
+
+ hlist_del_rcu(&gw_node->list);
+ call_rcu(&gw_node->rcu, gw_node_free_rcu);
+ }
+
+
+ spin_unlock_bh(&bat_priv->gw_list_lock);
+}
+
+static int _write_buffer_text(struct bat_priv *bat_priv,
+ struct seq_file *seq, struct gw_node *gw_node)
+{
+ int down, up;
+
+ gw_bandwidth_to_kbit(gw_node->orig_node->gw_flags, &down, &up);
+
+ return seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %3i - %i%s/%i%s\n",
+ (bat_priv->curr_gw == gw_node ? "=>" : " "),
+ gw_node->orig_node->orig,
+ gw_node->orig_node->router->tq_avg,
+ gw_node->orig_node->router->addr,
+ gw_node->orig_node->router->if_incoming->net_dev->name,
+ gw_node->orig_node->gw_flags,
+ (down > 2048 ? down / 1024 : down),
+ (down > 2048 ? "MBit" : "KBit"),
+ (up > 2048 ? up / 1024 : up),
+ (up > 2048 ? "MBit" : "KBit"));
+}
+
+int gw_client_seq_print_text(struct seq_file *seq, void *offset)
+{
+ struct net_device *net_dev = (struct net_device *)seq->private;
+ struct bat_priv *bat_priv = netdev_priv(net_dev);
+ struct gw_node *gw_node;
+ struct hlist_node *node;
+ int gw_count = 0;
+
+ if (!bat_priv->primary_if) {
+
+ return seq_printf(seq, "BATMAN mesh %s disabled - please "
+ "specify interfaces to enable it\n",
+ net_dev->name);
+ }
+
+ if (bat_priv->primary_if->if_status != IF_ACTIVE) {
+
+ return seq_printf(seq, "BATMAN mesh %s disabled - "
+ "primary interface not active\n",
+ net_dev->name);
+ }
+
+ seq_printf(seq, " %-12s (%s/%i) %17s [%10s]: gw_class ... "
+ "[B.A.T.M.A.N. adv %s%s, MainIF/MAC: %s/%pM (%s)]\n",
+ "Gateway", "#", TQ_MAX_VALUE, "Nexthop",
+ "outgoingIF", SOURCE_VERSION, REVISION_VERSION_STR,
+ bat_priv->primary_if->net_dev->name,
+ bat_priv->primary_if->net_dev->dev_addr, net_dev->name);
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(gw_node, node, &bat_priv->gw_list, list) {
+ if (gw_node->deleted)
+ continue;
+
+ if (!gw_node->orig_node->router)
+ continue;
+
+ _write_buffer_text(bat_priv, seq, gw_node);
+ gw_count++;
+ }
+ rcu_read_unlock();
+
+ if (gw_count == 0)
+ seq_printf(seq, "No gateways in range ...\n");
+
+ return 0;
+}
+
+int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb)
+{
+ struct ethhdr *ethhdr;
+ struct iphdr *iphdr;
+ struct ipv6hdr *ipv6hdr;
+ struct udphdr *udphdr;
+ unsigned int header_len = 0;
+
+ if (atomic_read(&bat_priv->gw_mode) == GW_MODE_OFF)
+ return 0;
+
+ /* check for ethernet header */
+ if (!pskb_may_pull(skb, header_len + ETH_HLEN))
+ return 0;
+ ethhdr = (struct ethhdr *)skb->data;
+ header_len += ETH_HLEN;
+
+ /* check for initial vlan header */
+ if (ntohs(ethhdr->h_proto) == ETH_P_8021Q) {
+ if (!pskb_may_pull(skb, header_len + VLAN_HLEN))
+ return 0;
+ ethhdr = (struct ethhdr *)(skb->data + VLAN_HLEN);
+ header_len += VLAN_HLEN;
+ }
+
+ /* check for ip header */
+ switch (ntohs(ethhdr->h_proto)) {
+ case ETH_P_IP:
+ if (!pskb_may_pull(skb, header_len + sizeof(struct iphdr)))
+ return 0;
+ iphdr = (struct iphdr *)(skb->data + header_len);
+ header_len += iphdr->ihl * 4;
+
+ /* check for udp header */
+ if (iphdr->protocol != IPPROTO_UDP)
+ return 0;
+
+ break;
+ case ETH_P_IPV6:
+ if (!pskb_may_pull(skb, header_len + sizeof(struct ipv6hdr)))
+ return 0;
+ ipv6hdr = (struct ipv6hdr *)(skb->data + header_len);
+ header_len += sizeof(struct ipv6hdr);
+
+ /* check for udp header */
+ if (ipv6hdr->nexthdr != IPPROTO_UDP)
+ return 0;
+
+ break;
+ default:
+ return 0;
+ }
+
+ if (!pskb_may_pull(skb, header_len + sizeof(struct udphdr)))
+ return 0;
+ udphdr = (struct udphdr *)(skb->data + header_len);
+ header_len += sizeof(struct udphdr);
+
+ /* check for bootp port */
+ if ((ntohs(ethhdr->h_proto) == ETH_P_IP) &&
+ (ntohs(udphdr->dest) != 67))
+ return 0;
+
+ if ((ntohs(ethhdr->h_proto) == ETH_P_IPV6) &&
+ (ntohs(udphdr->dest) != 547))
+ return 0;
+
+ if (atomic_read(&bat_priv->gw_mode) == GW_MODE_SERVER)
+ return -1;
+
+ if (!bat_priv->curr_gw)
+ return 0;
+
+ return 1;
+}
--- /dev/null
+/*
+ * Copyright (C) 2009-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_GATEWAY_CLIENT_H_
+#define _NET_BATMAN_ADV_GATEWAY_CLIENT_H_
+
+void gw_deselect(struct bat_priv *bat_priv);
+void gw_election(struct bat_priv *bat_priv);
+void *gw_get_selected(struct bat_priv *bat_priv);
+void gw_check_election(struct bat_priv *bat_priv, struct orig_node *orig_node);
+void gw_node_update(struct bat_priv *bat_priv,
+ struct orig_node *orig_node, uint8_t new_gwflags);
+void gw_node_delete(struct bat_priv *bat_priv, struct orig_node *orig_node);
+void gw_node_purge(struct bat_priv *bat_priv);
+int gw_client_seq_print_text(struct seq_file *seq, void *offset);
+int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb);
+
+#endif /* _NET_BATMAN_ADV_GATEWAY_CLIENT_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2009-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "gateway_common.h"
+#include "gateway_client.h"
+
+/* calculates the gateway class from kbit */
+static void kbit_to_gw_bandwidth(int down, int up, long *gw_srv_class)
+{
+ int mdown = 0, tdown, tup, difference;
+ uint8_t sbit, part;
+
+ *gw_srv_class = 0;
+ difference = 0x0FFFFFFF;
+
+ /* test all downspeeds */
+ for (sbit = 0; sbit < 2; sbit++) {
+ for (part = 0; part < 16; part++) {
+ tdown = 32 * (sbit + 2) * (1 << part);
+
+ if (abs(tdown - down) < difference) {
+ *gw_srv_class = (sbit << 7) + (part << 3);
+ difference = abs(tdown - down);
+ mdown = tdown;
+ }
+ }
+ }
+
+ /* test all upspeeds */
+ difference = 0x0FFFFFFF;
+
+ for (part = 0; part < 8; part++) {
+ tup = ((part + 1) * (mdown)) / 8;
+
+ if (abs(tup - up) < difference) {
+ *gw_srv_class = (*gw_srv_class & 0xF8) | part;
+ difference = abs(tup - up);
+ }
+ }
+}
+
+/* returns the up and downspeeds in kbit, calculated from the class */
+void gw_bandwidth_to_kbit(uint8_t gw_srv_class, int *down, int *up)
+{
+ char sbit = (gw_srv_class & 0x80) >> 7;
+ char dpart = (gw_srv_class & 0x78) >> 3;
+ char upart = (gw_srv_class & 0x07);
+
+ if (!gw_srv_class) {
+ *down = 0;
+ *up = 0;
+ return;
+ }
+
+ *down = 32 * (sbit + 2) * (1 << dpart);
+ *up = ((upart + 1) * (*down)) / 8;
+}
+
+static bool parse_gw_bandwidth(struct net_device *net_dev, char *buff,
+ long *up, long *down)
+{
+ int ret, multi = 1;
+ char *slash_ptr, *tmp_ptr;
+
+ slash_ptr = strchr(buff, '/');
+ if (slash_ptr)
+ *slash_ptr = 0;
+
+ if (strlen(buff) > 4) {
+ tmp_ptr = buff + strlen(buff) - 4;
+
+ if (strnicmp(tmp_ptr, "mbit", 4) == 0)
+ multi = 1024;
+
+ if ((strnicmp(tmp_ptr, "kbit", 4) == 0) ||
+ (multi > 1))
+ *tmp_ptr = '\0';
+ }
+
+ ret = strict_strtoul(buff, 10, down);
+ if (ret) {
+ bat_err(net_dev,
+ "Download speed of gateway mode invalid: %s\n",
+ buff);
+ return false;
+ }
+
+ *down *= multi;
+
+ /* we also got some upload info */
+ if (slash_ptr) {
+ multi = 1;
+
+ if (strlen(slash_ptr + 1) > 4) {
+ tmp_ptr = slash_ptr + 1 - 4 + strlen(slash_ptr + 1);
+
+ if (strnicmp(tmp_ptr, "mbit", 4) == 0)
+ multi = 1024;
+
+ if ((strnicmp(tmp_ptr, "kbit", 4) == 0) ||
+ (multi > 1))
+ *tmp_ptr = '\0';
+ }
+
+ ret = strict_strtoul(slash_ptr + 1, 10, up);
+ if (ret) {
+ bat_err(net_dev,
+ "Upload speed of gateway mode invalid: "
+ "%s\n", slash_ptr + 1);
+ return false;
+ }
+
+ *up *= multi;
+ }
+
+ return true;
+}
+
+ssize_t gw_bandwidth_set(struct net_device *net_dev, char *buff, size_t count)
+{
+ struct bat_priv *bat_priv = netdev_priv(net_dev);
+ long gw_bandwidth_tmp = 0, up = 0, down = 0;
+ bool ret;
+
+ ret = parse_gw_bandwidth(net_dev, buff, &up, &down);
+ if (!ret)
+ goto end;
+
+ if ((!down) || (down < 256))
+ down = 2000;
+
+ if (!up)
+ up = down / 5;
+
+ kbit_to_gw_bandwidth(down, up, &gw_bandwidth_tmp);
+
+ /**
+ * the gw bandwidth we guessed above might not match the given
+ * speeds, hence we need to calculate it back to show the number
+ * that is going to be propagated
+ **/
+ gw_bandwidth_to_kbit((uint8_t)gw_bandwidth_tmp,
+ (int *)&down, (int *)&up);
+
+ gw_deselect(bat_priv);
+ bat_info(net_dev, "Changing gateway bandwidth from: '%i' to: '%ld' "
+ "(propagating: %ld%s/%ld%s)\n",
+ atomic_read(&bat_priv->gw_bandwidth), gw_bandwidth_tmp,
+ (down > 2048 ? down / 1024 : down),
+ (down > 2048 ? "MBit" : "KBit"),
+ (up > 2048 ? up / 1024 : up),
+ (up > 2048 ? "MBit" : "KBit"));
+
+ atomic_set(&bat_priv->gw_bandwidth, gw_bandwidth_tmp);
+
+end:
+ return count;
+}
--- /dev/null
+/*
+ * Copyright (C) 2009-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_GATEWAY_COMMON_H_
+#define _NET_BATMAN_ADV_GATEWAY_COMMON_H_
+
+enum gw_modes {
+ GW_MODE_OFF,
+ GW_MODE_CLIENT,
+ GW_MODE_SERVER,
+};
+
+#define GW_MODE_OFF_NAME "off"
+#define GW_MODE_CLIENT_NAME "client"
+#define GW_MODE_SERVER_NAME "server"
+
+void gw_bandwidth_to_kbit(uint8_t gw_class, int *down, int *up);
+ssize_t gw_bandwidth_set(struct net_device *net_dev, char *buff, size_t count);
+
+#endif /* _NET_BATMAN_ADV_GATEWAY_COMMON_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "hard-interface.h"
+#include "soft-interface.h"
+#include "send.h"
+#include "translation-table.h"
+#include "routing.h"
+#include "bat_sysfs.h"
+#include "originator.h"
+#include "hash.h"
+
+#include <linux/if_arp.h>
+
+/* protect update critical side of if_list - but not the content */
+static DEFINE_SPINLOCK(if_list_lock);
+
+static void hardif_free_rcu(struct rcu_head *rcu)
+{
+ struct batman_if *batman_if;
+
+ batman_if = container_of(rcu, struct batman_if, rcu);
+ dev_put(batman_if->net_dev);
+ kref_put(&batman_if->refcount, hardif_free_ref);
+}
+
+struct batman_if *get_batman_if_by_netdev(struct net_device *net_dev)
+{
+ struct batman_if *batman_if;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(batman_if, &if_list, list) {
+ if (batman_if->net_dev == net_dev)
+ goto out;
+ }
+
+ batman_if = NULL;
+
+out:
+ if (batman_if)
+ kref_get(&batman_if->refcount);
+
+ rcu_read_unlock();
+ return batman_if;
+}
+
+static int is_valid_iface(struct net_device *net_dev)
+{
+ if (net_dev->flags & IFF_LOOPBACK)
+ return 0;
+
+ if (net_dev->type != ARPHRD_ETHER)
+ return 0;
+
+ if (net_dev->addr_len != ETH_ALEN)
+ return 0;
+
+ /* no batman over batman */
+#ifdef HAVE_NET_DEVICE_OPS
+ if (net_dev->netdev_ops->ndo_start_xmit == interface_tx)
+ return 0;
+#else
+ if (net_dev->hard_start_xmit == interface_tx)
+ return 0;
+#endif
+
+ /* Device is being bridged */
+ /* if (net_dev->priv_flags & IFF_BRIDGE_PORT)
+ return 0; */
+
+ return 1;
+}
+
+static struct batman_if *get_active_batman_if(struct net_device *soft_iface)
+{
+ struct batman_if *batman_if;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(batman_if, &if_list, list) {
+ if (batman_if->soft_iface != soft_iface)
+ continue;
+
+ if (batman_if->if_status == IF_ACTIVE)
+ goto out;
+ }
+
+ batman_if = NULL;
+
+out:
+ if (batman_if)
+ kref_get(&batman_if->refcount);
+
+ rcu_read_unlock();
+ return batman_if;
+}
+
+static void update_primary_addr(struct bat_priv *bat_priv)
+{
+ struct vis_packet *vis_packet;
+
+ vis_packet = (struct vis_packet *)
+ bat_priv->my_vis_info->skb_packet->data;
+ memcpy(vis_packet->vis_orig,
+ bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+ memcpy(vis_packet->sender_orig,
+ bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+}
+
+static void set_primary_if(struct bat_priv *bat_priv,
+ struct batman_if *batman_if)
+{
+ struct batman_packet *batman_packet;
+ struct batman_if *old_if;
+
+ if (batman_if)
+ kref_get(&batman_if->refcount);
+
+ old_if = bat_priv->primary_if;
+ bat_priv->primary_if = batman_if;
+
+ if (old_if)
+ kref_put(&old_if->refcount, hardif_free_ref);
+
+ if (!bat_priv->primary_if)
+ return;
+
+ batman_packet = (struct batman_packet *)(batman_if->packet_buff);
+ batman_packet->flags = PRIMARIES_FIRST_HOP;
+ batman_packet->ttl = TTL;
+
+ update_primary_addr(bat_priv);
+
+ /***
+ * hacky trick to make sure that we send the HNA information via
+ * our new primary interface
+ */
+ atomic_set(&bat_priv->hna_local_changed, 1);
+}
+
+static bool hardif_is_iface_up(struct batman_if *batman_if)
+{
+ if (batman_if->net_dev->flags & IFF_UP)
+ return true;
+
+ return false;
+}
+
+static void update_mac_addresses(struct batman_if *batman_if)
+{
+ memcpy(((struct batman_packet *)(batman_if->packet_buff))->orig,
+ batman_if->net_dev->dev_addr, ETH_ALEN);
+ memcpy(((struct batman_packet *)(batman_if->packet_buff))->prev_sender,
+ batman_if->net_dev->dev_addr, ETH_ALEN);
+}
+
+static void check_known_mac_addr(struct net_device *net_dev)
+{
+ struct batman_if *batman_if;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(batman_if, &if_list, list) {
+ if ((batman_if->if_status != IF_ACTIVE) &&
+ (batman_if->if_status != IF_TO_BE_ACTIVATED))
+ continue;
+
+ if (batman_if->net_dev == net_dev)
+ continue;
+
+ if (!compare_orig(batman_if->net_dev->dev_addr,
+ net_dev->dev_addr))
+ continue;
+
+ pr_warning("The newly added mac address (%pM) already exists "
+ "on: %s\n", net_dev->dev_addr,
+ batman_if->net_dev->name);
+ pr_warning("It is strongly recommended to keep mac addresses "
+ "unique to avoid problems!\n");
+ }
+ rcu_read_unlock();
+}
+
+int hardif_min_mtu(struct net_device *soft_iface)
+{
+ struct bat_priv *bat_priv = netdev_priv(soft_iface);
+ struct batman_if *batman_if;
+ /* allow big frames if all devices are capable to do so
+ * (have MTU > 1500 + BAT_HEADER_LEN) */
+ int min_mtu = ETH_DATA_LEN;
+
+ if (atomic_read(&bat_priv->fragmentation))
+ goto out;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(batman_if, &if_list, list) {
+ if ((batman_if->if_status != IF_ACTIVE) &&
+ (batman_if->if_status != IF_TO_BE_ACTIVATED))
+ continue;
+
+ if (batman_if->soft_iface != soft_iface)
+ continue;
+
+ min_mtu = min_t(int, batman_if->net_dev->mtu - BAT_HEADER_LEN,
+ min_mtu);
+ }
+ rcu_read_unlock();
+out:
+ return min_mtu;
+}
+
+/* adjusts the MTU if a new interface with a smaller MTU appeared. */
+void update_min_mtu(struct net_device *soft_iface)
+{
+ int min_mtu;
+
+ min_mtu = hardif_min_mtu(soft_iface);
+ if (soft_iface->mtu != min_mtu)
+ soft_iface->mtu = min_mtu;
+}
+
+static void hardif_activate_interface(struct batman_if *batman_if)
+{
+ struct bat_priv *bat_priv;
+
+ if (batman_if->if_status != IF_INACTIVE)
+ return;
+
+ bat_priv = netdev_priv(batman_if->soft_iface);
+
+ update_mac_addresses(batman_if);
+ batman_if->if_status = IF_TO_BE_ACTIVATED;
+
+ /**
+ * the first active interface becomes our primary interface or
+ * the next active interface after the old primay interface was removed
+ */
+ if (!bat_priv->primary_if)
+ set_primary_if(bat_priv, batman_if);
+
+ bat_info(batman_if->soft_iface, "Interface activated: %s\n",
+ batman_if->net_dev->name);
+
+ update_min_mtu(batman_if->soft_iface);
+ return;
+}
+
+static void hardif_deactivate_interface(struct batman_if *batman_if)
+{
+ if ((batman_if->if_status != IF_ACTIVE) &&
+ (batman_if->if_status != IF_TO_BE_ACTIVATED))
+ return;
+
+ batman_if->if_status = IF_INACTIVE;
+
+ bat_info(batman_if->soft_iface, "Interface deactivated: %s\n",
+ batman_if->net_dev->name);
+
+ update_min_mtu(batman_if->soft_iface);
+}
+
+int hardif_enable_interface(struct batman_if *batman_if, char *iface_name)
+{
+ struct bat_priv *bat_priv;
+ struct batman_packet *batman_packet;
+
+ if (batman_if->if_status != IF_NOT_IN_USE)
+ goto out;
+
+ batman_if->soft_iface = dev_get_by_name(&init_net, iface_name);
+
+ if (!batman_if->soft_iface) {
+ batman_if->soft_iface = softif_create(iface_name);
+
+ if (!batman_if->soft_iface)
+ goto err;
+
+ /* dev_get_by_name() increases the reference counter for us */
+ dev_hold(batman_if->soft_iface);
+ }
+
+ bat_priv = netdev_priv(batman_if->soft_iface);
+ batman_if->packet_len = BAT_PACKET_LEN;
+ batman_if->packet_buff = kmalloc(batman_if->packet_len, GFP_ATOMIC);
+
+ if (!batman_if->packet_buff) {
+ bat_err(batman_if->soft_iface, "Can't add interface packet "
+ "(%s): out of memory\n", batman_if->net_dev->name);
+ goto err;
+ }
+
+ batman_packet = (struct batman_packet *)(batman_if->packet_buff);
+ batman_packet->packet_type = BAT_PACKET;
+ batman_packet->version = COMPAT_VERSION;
+ batman_packet->flags = 0;
+ batman_packet->ttl = 2;
+ batman_packet->tq = TQ_MAX_VALUE;
+ batman_packet->num_hna = 0;
+
+ batman_if->if_num = bat_priv->num_ifaces;
+ bat_priv->num_ifaces++;
+ batman_if->if_status = IF_INACTIVE;
+ orig_hash_add_if(batman_if, bat_priv->num_ifaces);
+
+ batman_if->batman_adv_ptype.type = __constant_htons(ETH_P_BATMAN);
+ batman_if->batman_adv_ptype.func = batman_skb_recv;
+ batman_if->batman_adv_ptype.dev = batman_if->net_dev;
+ kref_get(&batman_if->refcount);
+ dev_add_pack(&batman_if->batman_adv_ptype);
+
+ atomic_set(&batman_if->seqno, 1);
+ atomic_set(&batman_if->frag_seqno, 1);
+ bat_info(batman_if->soft_iface, "Adding interface: %s\n",
+ batman_if->net_dev->name);
+
+ if (atomic_read(&bat_priv->fragmentation) && batman_if->net_dev->mtu <
+ ETH_DATA_LEN + BAT_HEADER_LEN)
+ bat_info(batman_if->soft_iface,
+ "The MTU of interface %s is too small (%i) to handle "
+ "the transport of batman-adv packets. Packets going "
+ "over this interface will be fragmented on layer2 "
+ "which could impact the performance. Setting the MTU "
+ "to %zi would solve the problem.\n",
+ batman_if->net_dev->name, batman_if->net_dev->mtu,
+ ETH_DATA_LEN + BAT_HEADER_LEN);
+
+ if (!atomic_read(&bat_priv->fragmentation) && batman_if->net_dev->mtu <
+ ETH_DATA_LEN + BAT_HEADER_LEN)
+ bat_info(batman_if->soft_iface,
+ "The MTU of interface %s is too small (%i) to handle "
+ "the transport of batman-adv packets. If you experience"
+ " problems getting traffic through try increasing the "
+ "MTU to %zi.\n",
+ batman_if->net_dev->name, batman_if->net_dev->mtu,
+ ETH_DATA_LEN + BAT_HEADER_LEN);
+
+ if (hardif_is_iface_up(batman_if))
+ hardif_activate_interface(batman_if);
+ else
+ bat_err(batman_if->soft_iface, "Not using interface %s "
+ "(retrying later): interface not active\n",
+ batman_if->net_dev->name);
+
+ /* begin scheduling originator messages on that interface */
+ schedule_own_packet(batman_if);
+
+out:
+ return 0;
+
+err:
+ return -ENOMEM;
+}
+
+void hardif_disable_interface(struct batman_if *batman_if)
+{
+ struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
+
+ if (batman_if->if_status == IF_ACTIVE)
+ hardif_deactivate_interface(batman_if);
+
+ if (batman_if->if_status != IF_INACTIVE)
+ return;
+
+ bat_info(batman_if->soft_iface, "Removing interface: %s\n",
+ batman_if->net_dev->name);
+ dev_remove_pack(&batman_if->batman_adv_ptype);
+ kref_put(&batman_if->refcount, hardif_free_ref);
+
+ bat_priv->num_ifaces--;
+ orig_hash_del_if(batman_if, bat_priv->num_ifaces);
+
+ if (batman_if == bat_priv->primary_if) {
+ struct batman_if *new_if;
+
+ new_if = get_active_batman_if(batman_if->soft_iface);
+ set_primary_if(bat_priv, new_if);
+
+ if (new_if)
+ kref_put(&new_if->refcount, hardif_free_ref);
+ }
+
+ kfree(batman_if->packet_buff);
+ batman_if->packet_buff = NULL;
+ batman_if->if_status = IF_NOT_IN_USE;
+
+ /* delete all references to this batman_if */
+ purge_orig_ref(bat_priv);
+ purge_outstanding_packets(bat_priv, batman_if);
+ dev_put(batman_if->soft_iface);
+
+ /* nobody uses this interface anymore */
+ if (!bat_priv->num_ifaces)
+ softif_destroy(batman_if->soft_iface);
+
+ batman_if->soft_iface = NULL;
+}
+
+static struct batman_if *hardif_add_interface(struct net_device *net_dev)
+{
+ struct batman_if *batman_if;
+ int ret;
+
+ ret = is_valid_iface(net_dev);
+ if (ret != 1)
+ goto out;
+
+ dev_hold(net_dev);
+
+ batman_if = kmalloc(sizeof(struct batman_if), GFP_ATOMIC);
+ if (!batman_if) {
+ pr_err("Can't add interface (%s): out of memory\n",
+ net_dev->name);
+ goto release_dev;
+ }
+
+ ret = sysfs_add_hardif(&batman_if->hardif_obj, net_dev);
+ if (ret)
+ goto free_if;
+
+ batman_if->if_num = -1;
+ batman_if->net_dev = net_dev;
+ batman_if->soft_iface = NULL;
+ batman_if->if_status = IF_NOT_IN_USE;
+ INIT_LIST_HEAD(&batman_if->list);
+ kref_init(&batman_if->refcount);
+
+ check_known_mac_addr(batman_if->net_dev);
+
+ spin_lock(&if_list_lock);
+ list_add_tail_rcu(&batman_if->list, &if_list);
+ spin_unlock(&if_list_lock);
+
+ /* extra reference for return */
+ kref_get(&batman_if->refcount);
+ return batman_if;
+
+free_if:
+ kfree(batman_if);
+release_dev:
+ dev_put(net_dev);
+out:
+ return NULL;
+}
+
+static void hardif_remove_interface(struct batman_if *batman_if)
+{
+ /* first deactivate interface */
+ if (batman_if->if_status != IF_NOT_IN_USE)
+ hardif_disable_interface(batman_if);
+
+ if (batman_if->if_status != IF_NOT_IN_USE)
+ return;
+
+ batman_if->if_status = IF_TO_BE_REMOVED;
+ sysfs_del_hardif(&batman_if->hardif_obj);
+ call_rcu(&batman_if->rcu, hardif_free_rcu);
+}
+
+void hardif_remove_interfaces(void)
+{
+ struct batman_if *batman_if, *batman_if_tmp;
+ struct list_head if_queue;
+
+ INIT_LIST_HEAD(&if_queue);
+
+ spin_lock(&if_list_lock);
+ list_for_each_entry_safe(batman_if, batman_if_tmp, &if_list, list) {
+ list_del_rcu(&batman_if->list);
+ list_add_tail(&batman_if->list, &if_queue);
+ }
+ spin_unlock(&if_list_lock);
+
+ rtnl_lock();
+ list_for_each_entry_safe(batman_if, batman_if_tmp, &if_queue, list) {
+ hardif_remove_interface(batman_if);
+ }
+ rtnl_unlock();
+}
+
+static int hard_if_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct net_device *net_dev = (struct net_device *)ptr;
+ struct batman_if *batman_if = get_batman_if_by_netdev(net_dev);
+ struct bat_priv *bat_priv;
+
+ if (!batman_if && event == NETDEV_REGISTER)
+ batman_if = hardif_add_interface(net_dev);
+
+ if (!batman_if)
+ goto out;
+
+ switch (event) {
+ case NETDEV_UP:
+ hardif_activate_interface(batman_if);
+ break;
+ case NETDEV_GOING_DOWN:
+ case NETDEV_DOWN:
+ hardif_deactivate_interface(batman_if);
+ break;
+ case NETDEV_UNREGISTER:
+ spin_lock(&if_list_lock);
+ list_del_rcu(&batman_if->list);
+ spin_unlock(&if_list_lock);
+
+ hardif_remove_interface(batman_if);
+ break;
+ case NETDEV_CHANGEMTU:
+ if (batman_if->soft_iface)
+ update_min_mtu(batman_if->soft_iface);
+ break;
+ case NETDEV_CHANGEADDR:
+ if (batman_if->if_status == IF_NOT_IN_USE)
+ goto hardif_put;
+
+ check_known_mac_addr(batman_if->net_dev);
+ update_mac_addresses(batman_if);
+
+ bat_priv = netdev_priv(batman_if->soft_iface);
+ if (batman_if == bat_priv->primary_if)
+ update_primary_addr(bat_priv);
+ break;
+ default:
+ break;
+ };
+
+hardif_put:
+ kref_put(&batman_if->refcount, hardif_free_ref);
+out:
+ return NOTIFY_DONE;
+}
+
+/* receive a packet with the batman ethertype coming on a hard
+ * interface */
+int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *ptype, struct net_device *orig_dev)
+{
+ struct bat_priv *bat_priv;
+ struct batman_packet *batman_packet;
+ struct batman_if *batman_if;
+ int ret;
+
+ batman_if = container_of(ptype, struct batman_if, batman_adv_ptype);
+ skb = skb_share_check(skb, GFP_ATOMIC);
+
+ /* skb was released by skb_share_check() */
+ if (!skb)
+ goto err_out;
+
+ /* packet should hold at least type and version */
+ if (unlikely(!pskb_may_pull(skb, 2)))
+ goto err_free;
+
+ /* expect a valid ethernet header here. */
+ if (unlikely(skb->mac_len != sizeof(struct ethhdr)
+ || !skb_mac_header(skb)))
+ goto err_free;
+
+ if (!batman_if->soft_iface)
+ goto err_free;
+
+ bat_priv = netdev_priv(batman_if->soft_iface);
+
+ if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
+ goto err_free;
+
+ /* discard frames on not active interfaces */
+ if (batman_if->if_status != IF_ACTIVE)
+ goto err_free;
+
+ batman_packet = (struct batman_packet *)skb->data;
+
+ if (batman_packet->version != COMPAT_VERSION) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Drop packet: incompatible batman version (%i)\n",
+ batman_packet->version);
+ goto err_free;
+ }
+
+ /* all receive handlers return whether they received or reused
+ * the supplied skb. if not, we have to free the skb. */
+
+ switch (batman_packet->packet_type) {
+ /* batman originator packet */
+ case BAT_PACKET:
+ ret = recv_bat_packet(skb, batman_if);
+ break;
+
+ /* batman icmp packet */
+ case BAT_ICMP:
+ ret = recv_icmp_packet(skb, batman_if);
+ break;
+
+ /* unicast packet */
+ case BAT_UNICAST:
+ ret = recv_unicast_packet(skb, batman_if);
+ break;
+
+ /* fragmented unicast packet */
+ case BAT_UNICAST_FRAG:
+ ret = recv_ucast_frag_packet(skb, batman_if);
+ break;
+
+ /* broadcast packet */
+ case BAT_BCAST:
+ ret = recv_bcast_packet(skb, batman_if);
+ break;
+
+ /* vis packet */
+ case BAT_VIS:
+ ret = recv_vis_packet(skb, batman_if);
+ break;
+ default:
+ ret = NET_RX_DROP;
+ }
+
+ if (ret == NET_RX_DROP)
+ kfree_skb(skb);
+
+ /* return NET_RX_SUCCESS in any case as we
+ * most probably dropped the packet for
+ * routing-logical reasons. */
+
+ return NET_RX_SUCCESS;
+
+err_free:
+ kfree_skb(skb);
+err_out:
+ return NET_RX_DROP;
+}
+
+struct notifier_block hard_if_notifier = {
+ .notifier_call = hard_if_event,
+};
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_
+#define _NET_BATMAN_ADV_HARD_INTERFACE_H_
+
+#define IF_NOT_IN_USE 0
+#define IF_TO_BE_REMOVED 1
+#define IF_INACTIVE 2
+#define IF_ACTIVE 3
+#define IF_TO_BE_ACTIVATED 4
+#define IF_I_WANT_YOU 5
+
+extern struct notifier_block hard_if_notifier;
+
+struct batman_if *get_batman_if_by_netdev(struct net_device *net_dev);
+int hardif_enable_interface(struct batman_if *batman_if, char *iface_name);
+void hardif_disable_interface(struct batman_if *batman_if);
+void hardif_remove_interfaces(void);
+int batman_skb_recv(struct sk_buff *skb,
+ struct net_device *dev,
+ struct packet_type *ptype,
+ struct net_device *orig_dev);
+int hardif_min_mtu(struct net_device *soft_iface);
+void update_min_mtu(struct net_device *soft_iface);
+
+static inline void hardif_free_ref(struct kref *refcount)
+{
+ struct batman_if *batman_if;
+
+ batman_if = container_of(refcount, struct batman_if, refcount);
+ kfree(batman_if);
+}
+
+#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2006-2010 B.A.T.M.A.N. contributors:
+ *
+ * Simon Wunderlich, Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "hash.h"
+
+/* clears the hash */
+static void hash_init(struct hashtable_t *hash)
+{
+ int i;
+
+ for (i = 0 ; i < hash->size; i++)
+ INIT_HLIST_HEAD(&hash->table[i]);
+}
+
+/* free only the hashtable and the hash itself. */
+void hash_destroy(struct hashtable_t *hash)
+{
+ kfree(hash->table);
+ kfree(hash);
+}
+
+/* allocates and clears the hash */
+struct hashtable_t *hash_new(int size)
+{
+ struct hashtable_t *hash;
+
+ hash = kmalloc(sizeof(struct hashtable_t) , GFP_ATOMIC);
+
+ if (!hash)
+ return NULL;
+
+ hash->size = size;
+ hash->table = kmalloc(sizeof(struct element_t *) * size, GFP_ATOMIC);
+
+ if (!hash->table) {
+ kfree(hash);
+ return NULL;
+ }
+
+ hash_init(hash);
+
+ return hash;
+}
--- /dev/null
+/*
+ * Copyright (C) 2006-2010 B.A.T.M.A.N. contributors:
+ *
+ * Simon Wunderlich, Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_HASH_H_
+#define _NET_BATMAN_ADV_HASH_H_
+
+#include <linux/list.h>
+
+/* callback to a compare function. should
+ * compare 2 element datas for their keys,
+ * return 0 if same and not 0 if not
+ * same */
+typedef int (*hashdata_compare_cb)(void *, void *);
+
+/* the hashfunction, should return an index
+ * based on the key in the data of the first
+ * argument and the size the second */
+typedef int (*hashdata_choose_cb)(void *, int);
+typedef void (*hashdata_free_cb)(void *, void *);
+
+struct element_t {
+ void *data; /* pointer to the data */
+ struct hlist_node hlist; /* bucket list pointer */
+};
+
+struct hashtable_t {
+ struct hlist_head *table; /* the hashtable itself, with the buckets */
+ int size; /* size of hashtable */
+};
+
+/* allocates and clears the hash */
+struct hashtable_t *hash_new(int size);
+
+/* remove element if you already found the element you want to delete and don't
+ * need the overhead to find it again with hash_remove(). But usually, you
+ * don't want to use this function, as it fiddles with hash-internals. */
+void *hash_remove_element(struct hashtable_t *hash, struct element_t *elem);
+
+/* free only the hashtable and the hash itself. */
+void hash_destroy(struct hashtable_t *hash);
+
+/* remove the hash structure. if hashdata_free_cb != NULL, this function will be
+ * called to remove the elements inside of the hash. if you don't remove the
+ * elements, memory might be leaked. */
+static inline void hash_delete(struct hashtable_t *hash,
+ hashdata_free_cb free_cb, void *arg)
+{
+ struct hlist_head *head;
+ struct hlist_node *walk, *safe;
+ struct element_t *bucket;
+ int i;
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_safe(walk, safe, head) {
+ bucket = hlist_entry(walk, struct element_t, hlist);
+ if (free_cb)
+ free_cb(bucket->data, arg);
+
+ hlist_del(walk);
+ kfree(bucket);
+ }
+ }
+
+ hash_destroy(hash);
+}
+
+/* adds data to the hashtable. returns 0 on success, -1 on error */
+static inline int hash_add(struct hashtable_t *hash,
+ hashdata_compare_cb compare,
+ hashdata_choose_cb choose, void *data)
+{
+ int index;
+ struct hlist_head *head;
+ struct hlist_node *walk, *safe;
+ struct element_t *bucket;
+
+ if (!hash)
+ return -1;
+
+ index = choose(data, hash->size);
+ head = &hash->table[index];
+
+ hlist_for_each_safe(walk, safe, head) {
+ bucket = hlist_entry(walk, struct element_t, hlist);
+ if (compare(bucket->data, data))
+ return -1;
+ }
+
+ /* no duplicate found in list, add new element */
+ bucket = kmalloc(sizeof(struct element_t), GFP_ATOMIC);
+
+ if (!bucket)
+ return -1;
+
+ bucket->data = data;
+ hlist_add_head(&bucket->hlist, head);
+
+ return 0;
+}
+
+/* removes data from hash, if found. returns pointer do data on success, so you
+ * can remove the used structure yourself, or NULL on error . data could be the
+ * structure you use with just the key filled, we just need the key for
+ * comparing. */
+static inline void *hash_remove(struct hashtable_t *hash,
+ hashdata_compare_cb compare,
+ hashdata_choose_cb choose, void *data)
+{
+ size_t index;
+ struct hlist_node *walk;
+ struct element_t *bucket;
+ struct hlist_head *head;
+ void *data_save;
+
+ index = choose(data, hash->size);
+ head = &hash->table[index];
+
+ hlist_for_each_entry(bucket, walk, head, hlist) {
+ if (compare(bucket->data, data)) {
+ data_save = bucket->data;
+ hlist_del(walk);
+ kfree(bucket);
+ return data_save;
+ }
+ }
+
+ return NULL;
+}
+
+/* finds data, based on the key in keydata. returns the found data on success,
+ * or NULL on error */
+static inline void *hash_find(struct hashtable_t *hash,
+ hashdata_compare_cb compare,
+ hashdata_choose_cb choose, void *keydata)
+{
+ int index;
+ struct hlist_head *head;
+ struct hlist_node *walk;
+ struct element_t *bucket;
+
+ if (!hash)
+ return NULL;
+
+ index = choose(keydata , hash->size);
+ head = &hash->table[index];
+
+ hlist_for_each(walk, head) {
+ bucket = hlist_entry(walk, struct element_t, hlist);
+ if (compare(bucket->data, keydata))
+ return bucket->data;
+ }
+
+ return NULL;
+}
+
+#endif /* _NET_BATMAN_ADV_HASH_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include <linux/debugfs.h>
+#include <linux/slab.h>
+#include "icmp_socket.h"
+#include "send.h"
+#include "types.h"
+#include "hash.h"
+#include "originator.h"
+#include "hard-interface.h"
+
+static struct socket_client *socket_client_hash[256];
+
+static void bat_socket_add_packet(struct socket_client *socket_client,
+ struct icmp_packet_rr *icmp_packet,
+ size_t icmp_len);
+
+void bat_socket_init(void)
+{
+ memset(socket_client_hash, 0, sizeof(socket_client_hash));
+}
+
+static int bat_socket_open(struct inode *inode, struct file *file)
+{
+ unsigned int i;
+ struct socket_client *socket_client;
+
+ nonseekable_open(inode, file);
+
+ socket_client = kmalloc(sizeof(struct socket_client), GFP_KERNEL);
+
+ if (!socket_client)
+ return -ENOMEM;
+
+ for (i = 0; i < ARRAY_SIZE(socket_client_hash); i++) {
+ if (!socket_client_hash[i]) {
+ socket_client_hash[i] = socket_client;
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(socket_client_hash)) {
+ pr_err("Error - can't add another packet client: "
+ "maximum number of clients reached\n");
+ kfree(socket_client);
+ return -EXFULL;
+ }
+
+ INIT_LIST_HEAD(&socket_client->queue_list);
+ socket_client->queue_len = 0;
+ socket_client->index = i;
+ socket_client->bat_priv = inode->i_private;
+ spin_lock_init(&socket_client->lock);
+ init_waitqueue_head(&socket_client->queue_wait);
+
+ file->private_data = socket_client;
+
+ inc_module_count();
+ return 0;
+}
+
+static int bat_socket_release(struct inode *inode, struct file *file)
+{
+ struct socket_client *socket_client = file->private_data;
+ struct socket_packet *socket_packet;
+ struct list_head *list_pos, *list_pos_tmp;
+
+ spin_lock_bh(&socket_client->lock);
+
+ /* for all packets in the queue ... */
+ list_for_each_safe(list_pos, list_pos_tmp, &socket_client->queue_list) {
+ socket_packet = list_entry(list_pos,
+ struct socket_packet, list);
+
+ list_del(list_pos);
+ kfree(socket_packet);
+ }
+
+ socket_client_hash[socket_client->index] = NULL;
+ spin_unlock_bh(&socket_client->lock);
+
+ kfree(socket_client);
+ dec_module_count();
+
+ return 0;
+}
+
+static ssize_t bat_socket_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct socket_client *socket_client = file->private_data;
+ struct socket_packet *socket_packet;
+ size_t packet_len;
+ int error;
+
+ if ((file->f_flags & O_NONBLOCK) && (socket_client->queue_len == 0))
+ return -EAGAIN;
+
+ if ((!buf) || (count < sizeof(struct icmp_packet)))
+ return -EINVAL;
+
+ if (!access_ok(VERIFY_WRITE, buf, count))
+ return -EFAULT;
+
+ error = wait_event_interruptible(socket_client->queue_wait,
+ socket_client->queue_len);
+
+ if (error)
+ return error;
+
+ spin_lock_bh(&socket_client->lock);
+
+ socket_packet = list_first_entry(&socket_client->queue_list,
+ struct socket_packet, list);
+ list_del(&socket_packet->list);
+ socket_client->queue_len--;
+
+ spin_unlock_bh(&socket_client->lock);
+
+ error = __copy_to_user(buf, &socket_packet->icmp_packet,
+ socket_packet->icmp_len);
+
+ packet_len = socket_packet->icmp_len;
+ kfree(socket_packet);
+
+ if (error)
+ return -EFAULT;
+
+ return packet_len;
+}
+
+static ssize_t bat_socket_write(struct file *file, const char __user *buff,
+ size_t len, loff_t *off)
+{
+ struct socket_client *socket_client = file->private_data;
+ struct bat_priv *bat_priv = socket_client->bat_priv;
+ struct sk_buff *skb;
+ struct icmp_packet_rr *icmp_packet;
+
+ struct orig_node *orig_node;
+ struct batman_if *batman_if;
+ size_t packet_len = sizeof(struct icmp_packet);
+ uint8_t dstaddr[ETH_ALEN];
+
+ if (len < sizeof(struct icmp_packet)) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Error - can't send packet from char device: "
+ "invalid packet size\n");
+ return -EINVAL;
+ }
+
+ if (!bat_priv->primary_if)
+ return -EFAULT;
+
+ if (len >= sizeof(struct icmp_packet_rr))
+ packet_len = sizeof(struct icmp_packet_rr);
+
+ skb = dev_alloc_skb(packet_len + sizeof(struct ethhdr));
+ if (!skb)
+ return -ENOMEM;
+
+ skb_reserve(skb, sizeof(struct ethhdr));
+ icmp_packet = (struct icmp_packet_rr *)skb_put(skb, packet_len);
+
+ if (!access_ok(VERIFY_READ, buff, packet_len)) {
+ len = -EFAULT;
+ goto free_skb;
+ }
+
+ if (__copy_from_user(icmp_packet, buff, packet_len)) {
+ len = -EFAULT;
+ goto free_skb;
+ }
+
+ if (icmp_packet->packet_type != BAT_ICMP) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Error - can't send packet from char device: "
+ "got bogus packet type (expected: BAT_ICMP)\n");
+ len = -EINVAL;
+ goto free_skb;
+ }
+
+ if (icmp_packet->msg_type != ECHO_REQUEST) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Error - can't send packet from char device: "
+ "got bogus message type (expected: ECHO_REQUEST)\n");
+ len = -EINVAL;
+ goto free_skb;
+ }
+
+ icmp_packet->uid = socket_client->index;
+
+ if (icmp_packet->version != COMPAT_VERSION) {
+ icmp_packet->msg_type = PARAMETER_PROBLEM;
+ icmp_packet->ttl = COMPAT_VERSION;
+ bat_socket_add_packet(socket_client, icmp_packet, packet_len);
+ goto free_skb;
+ }
+
+ if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
+ goto dst_unreach;
+
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+ orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
+ compare_orig, choose_orig,
+ icmp_packet->dst));
+
+ if (!orig_node)
+ goto unlock;
+
+ if (!orig_node->router)
+ goto unlock;
+
+ batman_if = orig_node->router->if_incoming;
+ memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
+
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ if (!batman_if)
+ goto dst_unreach;
+
+ if (batman_if->if_status != IF_ACTIVE)
+ goto dst_unreach;
+
+ memcpy(icmp_packet->orig,
+ bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+
+ if (packet_len == sizeof(struct icmp_packet_rr))
+ memcpy(icmp_packet->rr, batman_if->net_dev->dev_addr, ETH_ALEN);
+
+
+ send_skb_packet(skb, batman_if, dstaddr);
+
+ goto out;
+
+unlock:
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+dst_unreach:
+ icmp_packet->msg_type = DESTINATION_UNREACHABLE;
+ bat_socket_add_packet(socket_client, icmp_packet, packet_len);
+free_skb:
+ kfree_skb(skb);
+out:
+ return len;
+}
+
+static unsigned int bat_socket_poll(struct file *file, poll_table *wait)
+{
+ struct socket_client *socket_client = file->private_data;
+
+ poll_wait(file, &socket_client->queue_wait, wait);
+
+ if (socket_client->queue_len > 0)
+ return POLLIN | POLLRDNORM;
+
+ return 0;
+}
+
+static const struct file_operations fops = {
+ .owner = THIS_MODULE,
+ .open = bat_socket_open,
+ .release = bat_socket_release,
+ .read = bat_socket_read,
+ .write = bat_socket_write,
+ .poll = bat_socket_poll,
+ .llseek = no_llseek,
+};
+
+int bat_socket_setup(struct bat_priv *bat_priv)
+{
+ struct dentry *d;
+
+ if (!bat_priv->debug_dir)
+ goto err;
+
+ d = debugfs_create_file(ICMP_SOCKET, S_IFREG | S_IWUSR | S_IRUSR,
+ bat_priv->debug_dir, bat_priv, &fops);
+ if (d)
+ goto err;
+
+ return 0;
+
+err:
+ return 1;
+}
+
+static void bat_socket_add_packet(struct socket_client *socket_client,
+ struct icmp_packet_rr *icmp_packet,
+ size_t icmp_len)
+{
+ struct socket_packet *socket_packet;
+
+ socket_packet = kmalloc(sizeof(struct socket_packet), GFP_ATOMIC);
+
+ if (!socket_packet)
+ return;
+
+ INIT_LIST_HEAD(&socket_packet->list);
+ memcpy(&socket_packet->icmp_packet, icmp_packet, icmp_len);
+ socket_packet->icmp_len = icmp_len;
+
+ spin_lock_bh(&socket_client->lock);
+
+ /* while waiting for the lock the socket_client could have been
+ * deleted */
+ if (!socket_client_hash[icmp_packet->uid]) {
+ spin_unlock_bh(&socket_client->lock);
+ kfree(socket_packet);
+ return;
+ }
+
+ list_add_tail(&socket_packet->list, &socket_client->queue_list);
+ socket_client->queue_len++;
+
+ if (socket_client->queue_len > 100) {
+ socket_packet = list_first_entry(&socket_client->queue_list,
+ struct socket_packet, list);
+
+ list_del(&socket_packet->list);
+ kfree(socket_packet);
+ socket_client->queue_len--;
+ }
+
+ spin_unlock_bh(&socket_client->lock);
+
+ wake_up(&socket_client->queue_wait);
+}
+
+void bat_socket_receive_packet(struct icmp_packet_rr *icmp_packet,
+ size_t icmp_len)
+{
+ struct socket_client *hash = socket_client_hash[icmp_packet->uid];
+
+ if (hash)
+ bat_socket_add_packet(hash, icmp_packet, icmp_len);
+}
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_ICMP_SOCKET_H_
+#define _NET_BATMAN_ADV_ICMP_SOCKET_H_
+
+#include "types.h"
+
+#define ICMP_SOCKET "socket"
+
+void bat_socket_init(void);
+int bat_socket_setup(struct bat_priv *bat_priv);
+void bat_socket_receive_packet(struct icmp_packet_rr *icmp_packet,
+ size_t icmp_len);
+
+#endif /* _NET_BATMAN_ADV_ICMP_SOCKET_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "bat_sysfs.h"
+#include "bat_debugfs.h"
+#include "routing.h"
+#include "send.h"
+#include "originator.h"
+#include "soft-interface.h"
+#include "icmp_socket.h"
+#include "translation-table.h"
+#include "hard-interface.h"
+#include "gateway_client.h"
+#include "types.h"
+#include "vis.h"
+#include "hash.h"
+
+struct list_head if_list;
+
+unsigned char broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+
+struct workqueue_struct *bat_event_workqueue;
+
+static int __init batman_init(void)
+{
+ INIT_LIST_HEAD(&if_list);
+
+ /* the name should not be longer than 10 chars - see
+ * http://lwn.net/Articles/23634/ */
+ bat_event_workqueue = create_singlethread_workqueue("bat_events");
+
+ if (!bat_event_workqueue)
+ return -ENOMEM;
+
+ bat_socket_init();
+ debugfs_init();
+
+ register_netdevice_notifier(&hard_if_notifier);
+
+ pr_info("B.A.T.M.A.N. advanced %s%s (compatibility version %i) "
+ "loaded\n", SOURCE_VERSION, REVISION_VERSION_STR,
+ COMPAT_VERSION);
+
+ return 0;
+}
+
+static void __exit batman_exit(void)
+{
+ debugfs_destroy();
+ unregister_netdevice_notifier(&hard_if_notifier);
+ hardif_remove_interfaces();
+
+ flush_workqueue(bat_event_workqueue);
+ destroy_workqueue(bat_event_workqueue);
+ bat_event_workqueue = NULL;
+
+ rcu_barrier();
+}
+
+int mesh_init(struct net_device *soft_iface)
+{
+ struct bat_priv *bat_priv = netdev_priv(soft_iface);
+
+ spin_lock_init(&bat_priv->orig_hash_lock);
+ spin_lock_init(&bat_priv->forw_bat_list_lock);
+ spin_lock_init(&bat_priv->forw_bcast_list_lock);
+ spin_lock_init(&bat_priv->hna_lhash_lock);
+ spin_lock_init(&bat_priv->hna_ghash_lock);
+ spin_lock_init(&bat_priv->gw_list_lock);
+ spin_lock_init(&bat_priv->vis_hash_lock);
+ spin_lock_init(&bat_priv->vis_list_lock);
+ spin_lock_init(&bat_priv->softif_neigh_lock);
+
+ INIT_HLIST_HEAD(&bat_priv->forw_bat_list);
+ INIT_HLIST_HEAD(&bat_priv->forw_bcast_list);
+ INIT_HLIST_HEAD(&bat_priv->gw_list);
+ INIT_HLIST_HEAD(&bat_priv->softif_neigh_list);
+
+ if (originator_init(bat_priv) < 1)
+ goto err;
+
+ if (hna_local_init(bat_priv) < 1)
+ goto err;
+
+ if (hna_global_init(bat_priv) < 1)
+ goto err;
+
+ hna_local_add(soft_iface, soft_iface->dev_addr);
+
+ if (vis_init(bat_priv) < 1)
+ goto err;
+
+ atomic_set(&bat_priv->mesh_state, MESH_ACTIVE);
+ goto end;
+
+err:
+ pr_err("Unable to allocate memory for mesh information structures: "
+ "out of mem ?\n");
+ mesh_free(soft_iface);
+ return -1;
+
+end:
+ return 0;
+}
+
+void mesh_free(struct net_device *soft_iface)
+{
+ struct bat_priv *bat_priv = netdev_priv(soft_iface);
+
+ atomic_set(&bat_priv->mesh_state, MESH_DEACTIVATING);
+
+ purge_outstanding_packets(bat_priv, NULL);
+
+ vis_quit(bat_priv);
+
+ gw_node_purge(bat_priv);
+ originator_free(bat_priv);
+
+ hna_local_free(bat_priv);
+ hna_global_free(bat_priv);
+
+ softif_neigh_purge(bat_priv);
+
+ atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
+}
+
+void inc_module_count(void)
+{
+ try_module_get(THIS_MODULE);
+}
+
+void dec_module_count(void)
+{
+ module_put(THIS_MODULE);
+}
+
+int is_my_mac(uint8_t *addr)
+{
+ struct batman_if *batman_if;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(batman_if, &if_list, list) {
+ if (batman_if->if_status != IF_ACTIVE)
+ continue;
+
+ if (compare_orig(batman_if->net_dev->dev_addr, addr)) {
+ rcu_read_unlock();
+ return 1;
+ }
+ }
+ rcu_read_unlock();
+ return 0;
+
+}
+
+module_init(batman_init);
+module_exit(batman_exit);
+
+MODULE_LICENSE("GPL");
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_SUPPORTED_DEVICE(DRIVER_DEVICE);
+#ifdef REVISION_VERSION
+MODULE_VERSION(SOURCE_VERSION "-" REVISION_VERSION);
+#else
+MODULE_VERSION(SOURCE_VERSION);
+#endif
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_MAIN_H_
+#define _NET_BATMAN_ADV_MAIN_H_
+
+/* Kernel Programming */
+#define LINUX
+
+#define DRIVER_AUTHOR "Marek Lindner <lindner_marek@yahoo.de>, " \
+ "Simon Wunderlich <siwu@hrz.tu-chemnitz.de>"
+#define DRIVER_DESC "B.A.T.M.A.N. advanced"
+#define DRIVER_DEVICE "batman-adv"
+
+#define SOURCE_VERSION "next"
+
+
+/* B.A.T.M.A.N. parameters */
+
+#define TQ_MAX_VALUE 255
+#define JITTER 20
+#define TTL 50 /* Time To Live of broadcast messages */
+
+#define PURGE_TIMEOUT 200 /* purge originators after time in seconds if no
+ * valid packet comes in -> TODO: check
+ * influence on TQ_LOCAL_WINDOW_SIZE */
+#define LOCAL_HNA_TIMEOUT 3600 /* in seconds */
+
+#define TQ_LOCAL_WINDOW_SIZE 64 /* sliding packet range of received originator
+ * messages in squence numbers (should be a
+ * multiple of our word size) */
+#define TQ_GLOBAL_WINDOW_SIZE 5
+#define TQ_LOCAL_BIDRECT_SEND_MINIMUM 1
+#define TQ_LOCAL_BIDRECT_RECV_MINIMUM 1
+#define TQ_TOTAL_BIDRECT_LIMIT 1
+
+#define NUM_WORDS (TQ_LOCAL_WINDOW_SIZE / WORD_BIT_SIZE)
+
+#define PACKBUFF_SIZE 2000
+#define LOG_BUF_LEN 8192 /* has to be a power of 2 */
+
+#define VIS_INTERVAL 5000 /* 5 seconds */
+
+/* how much worse secondary interfaces may be to
+ * to be considered as bonding candidates */
+
+#define BONDING_TQ_THRESHOLD 50
+
+#define MAX_AGGREGATION_BYTES 512 /* should not be bigger than 512 bytes or
+ * change the size of
+ * forw_packet->direct_link_flags */
+#define MAX_AGGREGATION_MS 100
+
+#define SOFTIF_NEIGH_TIMEOUT 180000 /* 3 minutes */
+
+#define RESET_PROTECTION_MS 30000
+#define EXPECTED_SEQNO_RANGE 65536
+/* don't reset again within 30 seconds */
+
+#define MESH_INACTIVE 0
+#define MESH_ACTIVE 1
+#define MESH_DEACTIVATING 2
+
+#define BCAST_QUEUE_LEN 256
+#define BATMAN_QUEUE_LEN 256
+
+/*
+ * Debug Messages
+ */
+#ifdef pr_fmt
+#undef pr_fmt
+#endif
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt /* Append 'batman-adv: ' before
+ * kernel messages */
+
+#define DBG_BATMAN 1 /* all messages related to routing / flooding /
+ * broadcasting / etc */
+#define DBG_ROUTES 2 /* route or hna added / changed / deleted */
+#define DBG_ALL 3
+
+#define LOG_BUF_LEN 8192 /* has to be a power of 2 */
+
+
+/*
+ * Vis
+ */
+
+/* #define VIS_SUBCLUSTERS_DISABLED */
+
+/*
+ * Kernel headers
+ */
+
+#include <linux/mutex.h> /* mutex */
+#include <linux/module.h> /* needed by all modules */
+#include <linux/netdevice.h> /* netdevice */
+#include <linux/etherdevice.h> /* ethernet address classifaction */
+#include <linux/if_ether.h> /* ethernet header */
+#include <linux/poll.h> /* poll_table */
+#include <linux/kthread.h> /* kernel threads */
+#include <linux/pkt_sched.h> /* schedule types */
+#include <linux/workqueue.h> /* workqueue */
+#include <linux/slab.h>
+#include <net/sock.h> /* struct sock */
+#include <linux/jiffies.h>
+#include <linux/seq_file.h>
+#include "types.h"
+
+#ifndef REVISION_VERSION
+#define REVISION_VERSION_STR ""
+#else
+#define REVISION_VERSION_STR " "REVISION_VERSION
+#endif
+
+extern struct list_head if_list;
+
+extern unsigned char broadcast_addr[];
+extern struct workqueue_struct *bat_event_workqueue;
+
+int mesh_init(struct net_device *soft_iface);
+void mesh_free(struct net_device *soft_iface);
+void inc_module_count(void);
+void dec_module_count(void);
+int is_my_mac(uint8_t *addr);
+
+#ifdef CONFIG_BATMAN_ADV_DEBUG
+int debug_log(struct bat_priv *bat_priv, char *fmt, ...);
+
+#define bat_dbg(type, bat_priv, fmt, arg...) \
+ do { \
+ if (atomic_read(&bat_priv->log_level) & type) \
+ debug_log(bat_priv, fmt, ## arg); \
+ } \
+ while (0)
+#else /* !CONFIG_BATMAN_ADV_DEBUG */
+static inline void bat_dbg(char type __attribute__((unused)),
+ struct bat_priv *bat_priv __attribute__((unused)),
+ char *fmt __attribute__((unused)), ...)
+{
+}
+#endif
+
+#define bat_warning(net_dev, fmt, arg...) \
+ do { \
+ struct net_device *_netdev = (net_dev); \
+ struct bat_priv *_batpriv = netdev_priv(_netdev); \
+ bat_dbg(DBG_ALL, _batpriv, fmt, ## arg); \
+ pr_warning("%s: " fmt, _netdev->name, ## arg); \
+ } while (0)
+#define bat_info(net_dev, fmt, arg...) \
+ do { \
+ struct net_device *_netdev = (net_dev); \
+ struct bat_priv *_batpriv = netdev_priv(_netdev); \
+ bat_dbg(DBG_ALL, _batpriv, fmt, ## arg); \
+ pr_info("%s: " fmt, _netdev->name, ## arg); \
+ } while (0)
+#define bat_err(net_dev, fmt, arg...) \
+ do { \
+ struct net_device *_netdev = (net_dev); \
+ struct bat_priv *_batpriv = netdev_priv(_netdev); \
+ bat_dbg(DBG_ALL, _batpriv, fmt, ## arg); \
+ pr_err("%s: " fmt, _netdev->name, ## arg); \
+ } while (0)
+
+#endif /* _NET_BATMAN_ADV_MAIN_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2009-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+/* increase the reference counter for this originator */
+
+#include "main.h"
+#include "originator.h"
+#include "hash.h"
+#include "translation-table.h"
+#include "routing.h"
+#include "gateway_client.h"
+#include "hard-interface.h"
+#include "unicast.h"
+#include "soft-interface.h"
+
+static void purge_orig(struct work_struct *work);
+
+static void start_purge_timer(struct bat_priv *bat_priv)
+{
+ INIT_DELAYED_WORK(&bat_priv->orig_work, purge_orig);
+ queue_delayed_work(bat_event_workqueue, &bat_priv->orig_work, 1 * HZ);
+}
+
+int originator_init(struct bat_priv *bat_priv)
+{
+ if (bat_priv->orig_hash)
+ return 1;
+
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+ bat_priv->orig_hash = hash_new(1024);
+
+ if (!bat_priv->orig_hash)
+ goto err;
+
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+ start_purge_timer(bat_priv);
+ return 1;
+
+err:
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+ return 0;
+}
+
+struct neigh_node *
+create_neighbor(struct orig_node *orig_node, struct orig_node *orig_neigh_node,
+ uint8_t *neigh, struct batman_if *if_incoming)
+{
+ struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
+ struct neigh_node *neigh_node;
+
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Creating new last-hop neighbor of originator\n");
+
+ neigh_node = kzalloc(sizeof(struct neigh_node), GFP_ATOMIC);
+ if (!neigh_node)
+ return NULL;
+
+ INIT_LIST_HEAD(&neigh_node->list);
+
+ memcpy(neigh_node->addr, neigh, ETH_ALEN);
+ neigh_node->orig_node = orig_neigh_node;
+ neigh_node->if_incoming = if_incoming;
+
+ list_add_tail(&neigh_node->list, &orig_node->neigh_list);
+ return neigh_node;
+}
+
+static void free_orig_node(void *data, void *arg)
+{
+ struct list_head *list_pos, *list_pos_tmp;
+ struct neigh_node *neigh_node;
+ struct orig_node *orig_node = (struct orig_node *)data;
+ struct bat_priv *bat_priv = (struct bat_priv *)arg;
+
+ /* for all neighbors towards this originator ... */
+ list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) {
+ neigh_node = list_entry(list_pos, struct neigh_node, list);
+
+ list_del(list_pos);
+ kfree(neigh_node);
+ }
+
+ frag_list_free(&orig_node->frag_list);
+ hna_global_del_orig(bat_priv, orig_node, "originator timed out");
+
+ kfree(orig_node->bcast_own);
+ kfree(orig_node->bcast_own_sum);
+ kfree(orig_node);
+}
+
+void originator_free(struct bat_priv *bat_priv)
+{
+ if (!bat_priv->orig_hash)
+ return;
+
+ cancel_delayed_work_sync(&bat_priv->orig_work);
+
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+ hash_delete(bat_priv->orig_hash, free_orig_node, bat_priv);
+ bat_priv->orig_hash = NULL;
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+}
+
+/* this function finds or creates an originator entry for the given
+ * address if it does not exits */
+struct orig_node *get_orig_node(struct bat_priv *bat_priv, uint8_t *addr)
+{
+ struct orig_node *orig_node;
+ int size;
+ int hash_added;
+
+ orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
+ compare_orig, choose_orig,
+ addr));
+
+ if (orig_node)
+ return orig_node;
+
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Creating new originator: %pM\n", addr);
+
+ orig_node = kzalloc(sizeof(struct orig_node), GFP_ATOMIC);
+ if (!orig_node)
+ return NULL;
+
+ INIT_LIST_HEAD(&orig_node->neigh_list);
+
+ memcpy(orig_node->orig, addr, ETH_ALEN);
+ orig_node->router = NULL;
+ orig_node->hna_buff = NULL;
+ orig_node->bcast_seqno_reset = jiffies - 1
+ - msecs_to_jiffies(RESET_PROTECTION_MS);
+ orig_node->batman_seqno_reset = jiffies - 1
+ - msecs_to_jiffies(RESET_PROTECTION_MS);
+
+ size = bat_priv->num_ifaces * sizeof(unsigned long) * NUM_WORDS;
+
+ orig_node->bcast_own = kzalloc(size, GFP_ATOMIC);
+ if (!orig_node->bcast_own)
+ goto free_orig_node;
+
+ size = bat_priv->num_ifaces * sizeof(uint8_t);
+ orig_node->bcast_own_sum = kzalloc(size, GFP_ATOMIC);
+
+ INIT_LIST_HEAD(&orig_node->frag_list);
+ orig_node->last_frag_packet = 0;
+
+ if (!orig_node->bcast_own_sum)
+ goto free_bcast_own;
+
+ hash_added = hash_add(bat_priv->orig_hash, compare_orig, choose_orig,
+ orig_node);
+ if (hash_added < 0)
+ goto free_bcast_own_sum;
+
+ return orig_node;
+free_bcast_own_sum:
+ kfree(orig_node->bcast_own_sum);
+free_bcast_own:
+ kfree(orig_node->bcast_own);
+free_orig_node:
+ kfree(orig_node);
+ return NULL;
+}
+
+static bool purge_orig_neighbors(struct bat_priv *bat_priv,
+ struct orig_node *orig_node,
+ struct neigh_node **best_neigh_node)
+{
+ struct list_head *list_pos, *list_pos_tmp;
+ struct neigh_node *neigh_node;
+ bool neigh_purged = false;
+
+ *best_neigh_node = NULL;
+
+ /* for all neighbors towards this originator ... */
+ list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) {
+ neigh_node = list_entry(list_pos, struct neigh_node, list);
+
+ if ((time_after(jiffies,
+ neigh_node->last_valid + PURGE_TIMEOUT * HZ)) ||
+ (neigh_node->if_incoming->if_status == IF_INACTIVE) ||
+ (neigh_node->if_incoming->if_status == IF_TO_BE_REMOVED)) {
+
+ if (neigh_node->if_incoming->if_status ==
+ IF_TO_BE_REMOVED)
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "neighbor purge: originator %pM, "
+ "neighbor: %pM, iface: %s\n",
+ orig_node->orig, neigh_node->addr,
+ neigh_node->if_incoming->net_dev->name);
+ else
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "neighbor timeout: originator %pM, "
+ "neighbor: %pM, last_valid: %lu\n",
+ orig_node->orig, neigh_node->addr,
+ (neigh_node->last_valid / HZ));
+
+ neigh_purged = true;
+ list_del(list_pos);
+ kfree(neigh_node);
+ } else {
+ if ((!*best_neigh_node) ||
+ (neigh_node->tq_avg > (*best_neigh_node)->tq_avg))
+ *best_neigh_node = neigh_node;
+ }
+ }
+ return neigh_purged;
+}
+
+static bool purge_orig_node(struct bat_priv *bat_priv,
+ struct orig_node *orig_node)
+{
+ struct neigh_node *best_neigh_node;
+
+ if (time_after(jiffies,
+ orig_node->last_valid + 2 * PURGE_TIMEOUT * HZ)) {
+
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Originator timeout: originator %pM, last_valid %lu\n",
+ orig_node->orig, (orig_node->last_valid / HZ));
+ return true;
+ } else {
+ if (purge_orig_neighbors(bat_priv, orig_node,
+ &best_neigh_node)) {
+ update_routes(bat_priv, orig_node,
+ best_neigh_node,
+ orig_node->hna_buff,
+ orig_node->hna_buff_len);
+ /* update bonding candidates, we could have lost
+ * some candidates. */
+ update_bonding_candidates(bat_priv, orig_node);
+ }
+ }
+
+ return false;
+}
+
+static void _purge_orig(struct bat_priv *bat_priv)
+{
+ struct hashtable_t *hash = bat_priv->orig_hash;
+ struct hlist_node *walk, *safe;
+ struct hlist_head *head;
+ struct element_t *bucket;
+ struct orig_node *orig_node;
+ int i;
+
+ if (!hash)
+ return;
+
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+
+ /* for all origins... */
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry_safe(bucket, walk, safe, head, hlist) {
+ orig_node = bucket->data;
+
+ if (purge_orig_node(bat_priv, orig_node)) {
+ if (orig_node->gw_flags)
+ gw_node_delete(bat_priv, orig_node);
+ hlist_del(walk);
+ kfree(bucket);
+ free_orig_node(orig_node, bat_priv);
+ }
+
+ if (time_after(jiffies, orig_node->last_frag_packet +
+ msecs_to_jiffies(FRAG_TIMEOUT)))
+ frag_list_free(&orig_node->frag_list);
+ }
+ }
+
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ gw_node_purge(bat_priv);
+ gw_election(bat_priv);
+
+ softif_neigh_purge(bat_priv);
+}
+
+static void purge_orig(struct work_struct *work)
+{
+ struct delayed_work *delayed_work =
+ container_of(work, struct delayed_work, work);
+ struct bat_priv *bat_priv =
+ container_of(delayed_work, struct bat_priv, orig_work);
+
+ _purge_orig(bat_priv);
+ start_purge_timer(bat_priv);
+}
+
+void purge_orig_ref(struct bat_priv *bat_priv)
+{
+ _purge_orig(bat_priv);
+}
+
+int orig_seq_print_text(struct seq_file *seq, void *offset)
+{
+ struct net_device *net_dev = (struct net_device *)seq->private;
+ struct bat_priv *bat_priv = netdev_priv(net_dev);
+ struct hashtable_t *hash = bat_priv->orig_hash;
+ struct hlist_node *walk;
+ struct hlist_head *head;
+ struct element_t *bucket;
+ struct orig_node *orig_node;
+ struct neigh_node *neigh_node;
+ int batman_count = 0;
+ int last_seen_secs;
+ int last_seen_msecs;
+ int i;
+
+ if ((!bat_priv->primary_if) ||
+ (bat_priv->primary_if->if_status != IF_ACTIVE)) {
+ if (!bat_priv->primary_if)
+ return seq_printf(seq, "BATMAN mesh %s disabled - "
+ "please specify interfaces to enable it\n",
+ net_dev->name);
+
+ return seq_printf(seq, "BATMAN mesh %s "
+ "disabled - primary interface not active\n",
+ net_dev->name);
+ }
+
+ seq_printf(seq, "[B.A.T.M.A.N. adv %s%s, MainIF/MAC: %s/%pM (%s)]\n",
+ SOURCE_VERSION, REVISION_VERSION_STR,
+ bat_priv->primary_if->net_dev->name,
+ bat_priv->primary_if->net_dev->dev_addr, net_dev->name);
+ seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n",
+ "Originator", "last-seen", "#", TQ_MAX_VALUE, "Nexthop",
+ "outgoingIF", "Potential nexthops");
+
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry(bucket, walk, head, hlist) {
+ orig_node = bucket->data;
+
+ if (!orig_node->router)
+ continue;
+
+ if (orig_node->router->tq_avg == 0)
+ continue;
+
+ last_seen_secs = jiffies_to_msecs(jiffies -
+ orig_node->last_valid) / 1000;
+ last_seen_msecs = jiffies_to_msecs(jiffies -
+ orig_node->last_valid) % 1000;
+
+ neigh_node = orig_node->router;
+ seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:",
+ orig_node->orig, last_seen_secs,
+ last_seen_msecs, neigh_node->tq_avg,
+ neigh_node->addr,
+ neigh_node->if_incoming->net_dev->name);
+
+ list_for_each_entry(neigh_node, &orig_node->neigh_list,
+ list) {
+ seq_printf(seq, " %pM (%3i)", neigh_node->addr,
+ neigh_node->tq_avg);
+ }
+
+ seq_printf(seq, "\n");
+ batman_count++;
+ }
+ }
+
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ if ((batman_count == 0))
+ seq_printf(seq, "No batman nodes in range ...\n");
+
+ return 0;
+}
+
+static int orig_node_add_if(struct orig_node *orig_node, int max_if_num)
+{
+ void *data_ptr;
+
+ data_ptr = kmalloc(max_if_num * sizeof(unsigned long) * NUM_WORDS,
+ GFP_ATOMIC);
+ if (!data_ptr) {
+ pr_err("Can't resize orig: out of memory\n");
+ return -1;
+ }
+
+ memcpy(data_ptr, orig_node->bcast_own,
+ (max_if_num - 1) * sizeof(unsigned long) * NUM_WORDS);
+ kfree(orig_node->bcast_own);
+ orig_node->bcast_own = data_ptr;
+
+ data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
+ if (!data_ptr) {
+ pr_err("Can't resize orig: out of memory\n");
+ return -1;
+ }
+
+ memcpy(data_ptr, orig_node->bcast_own_sum,
+ (max_if_num - 1) * sizeof(uint8_t));
+ kfree(orig_node->bcast_own_sum);
+ orig_node->bcast_own_sum = data_ptr;
+
+ return 0;
+}
+
+int orig_hash_add_if(struct batman_if *batman_if, int max_if_num)
+{
+ struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
+ struct hashtable_t *hash = bat_priv->orig_hash;
+ struct hlist_node *walk;
+ struct hlist_head *head;
+ struct element_t *bucket;
+ struct orig_node *orig_node;
+ int i;
+
+ /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
+ * if_num */
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry(bucket, walk, head, hlist) {
+ orig_node = bucket->data;
+
+ if (orig_node_add_if(orig_node, max_if_num) == -1)
+ goto err;
+ }
+ }
+
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+ return 0;
+
+err:
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+ return -ENOMEM;
+}
+
+static int orig_node_del_if(struct orig_node *orig_node,
+ int max_if_num, int del_if_num)
+{
+ void *data_ptr = NULL;
+ int chunk_size;
+
+ /* last interface was removed */
+ if (max_if_num == 0)
+ goto free_bcast_own;
+
+ chunk_size = sizeof(unsigned long) * NUM_WORDS;
+ data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC);
+ if (!data_ptr) {
+ pr_err("Can't resize orig: out of memory\n");
+ return -1;
+ }
+
+ /* copy first part */
+ memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size);
+
+ /* copy second part */
+ memcpy(data_ptr + del_if_num * chunk_size,
+ orig_node->bcast_own + ((del_if_num + 1) * chunk_size),
+ (max_if_num - del_if_num) * chunk_size);
+
+free_bcast_own:
+ kfree(orig_node->bcast_own);
+ orig_node->bcast_own = data_ptr;
+
+ if (max_if_num == 0)
+ goto free_own_sum;
+
+ data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
+ if (!data_ptr) {
+ pr_err("Can't resize orig: out of memory\n");
+ return -1;
+ }
+
+ memcpy(data_ptr, orig_node->bcast_own_sum,
+ del_if_num * sizeof(uint8_t));
+
+ memcpy(data_ptr + del_if_num * sizeof(uint8_t),
+ orig_node->bcast_own_sum + ((del_if_num + 1) * sizeof(uint8_t)),
+ (max_if_num - del_if_num) * sizeof(uint8_t));
+
+free_own_sum:
+ kfree(orig_node->bcast_own_sum);
+ orig_node->bcast_own_sum = data_ptr;
+
+ return 0;
+}
+
+int orig_hash_del_if(struct batman_if *batman_if, int max_if_num)
+{
+ struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
+ struct hashtable_t *hash = bat_priv->orig_hash;
+ struct hlist_node *walk;
+ struct hlist_head *head;
+ struct element_t *bucket;
+ struct batman_if *batman_if_tmp;
+ struct orig_node *orig_node;
+ int i, ret;
+
+ /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
+ * if_num */
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry(bucket, walk, head, hlist) {
+ orig_node = bucket->data;
+
+ ret = orig_node_del_if(orig_node, max_if_num,
+ batman_if->if_num);
+
+ if (ret == -1)
+ goto err;
+ }
+ }
+
+ /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
+ rcu_read_lock();
+ list_for_each_entry_rcu(batman_if_tmp, &if_list, list) {
+ if (batman_if_tmp->if_status == IF_NOT_IN_USE)
+ continue;
+
+ if (batman_if == batman_if_tmp)
+ continue;
+
+ if (batman_if->soft_iface != batman_if_tmp->soft_iface)
+ continue;
+
+ if (batman_if_tmp->if_num > batman_if->if_num)
+ batman_if_tmp->if_num--;
+ }
+ rcu_read_unlock();
+
+ batman_if->if_num = -1;
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+ return 0;
+
+err:
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+ return -ENOMEM;
+}
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_ORIGINATOR_H_
+#define _NET_BATMAN_ADV_ORIGINATOR_H_
+
+int originator_init(struct bat_priv *bat_priv);
+void originator_free(struct bat_priv *bat_priv);
+void purge_orig_ref(struct bat_priv *bat_priv);
+struct orig_node *get_orig_node(struct bat_priv *bat_priv, uint8_t *addr);
+struct neigh_node *
+create_neighbor(struct orig_node *orig_node, struct orig_node *orig_neigh_node,
+ uint8_t *neigh, struct batman_if *if_incoming);
+int orig_seq_print_text(struct seq_file *seq, void *offset);
+int orig_hash_add_if(struct batman_if *batman_if, int max_if_num);
+int orig_hash_del_if(struct batman_if *batman_if, int max_if_num);
+
+
+/* returns 1 if they are the same originator */
+static inline int compare_orig(void *data1, void *data2)
+{
+ return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
+}
+
+/* hashfunction to choose an entry in a hash table of given size */
+/* hash algorithm from http://en.wikipedia.org/wiki/Hash_table */
+static inline int choose_orig(void *data, int32_t size)
+{
+ unsigned char *key = data;
+ uint32_t hash = 0;
+ size_t i;
+
+ for (i = 0; i < 6; i++) {
+ hash += key[i];
+ hash += (hash << 10);
+ hash ^= (hash >> 6);
+ }
+
+ hash += (hash << 3);
+ hash ^= (hash >> 11);
+ hash += (hash << 15);
+
+ return hash % size;
+}
+
+#endif /* _NET_BATMAN_ADV_ORIGINATOR_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_PACKET_H_
+#define _NET_BATMAN_ADV_PACKET_H_
+
+#define ETH_P_BATMAN 0x4305 /* unofficial/not registered Ethertype */
+
+#define BAT_PACKET 0x01
+#define BAT_ICMP 0x02
+#define BAT_UNICAST 0x03
+#define BAT_BCAST 0x04
+#define BAT_VIS 0x05
+#define BAT_UNICAST_FRAG 0x06
+
+/* this file is included by batctl which needs these defines */
+#define COMPAT_VERSION 12
+#define DIRECTLINK 0x40
+#define VIS_SERVER 0x20
+#define PRIMARIES_FIRST_HOP 0x10
+
+/* ICMP message types */
+#define ECHO_REPLY 0
+#define DESTINATION_UNREACHABLE 3
+#define ECHO_REQUEST 8
+#define TTL_EXCEEDED 11
+#define PARAMETER_PROBLEM 12
+
+/* vis defines */
+#define VIS_TYPE_SERVER_SYNC 0
+#define VIS_TYPE_CLIENT_UPDATE 1
+
+/* fragmentation defines */
+#define UNI_FRAG_HEAD 0x01
+
+struct batman_packet {
+ uint8_t packet_type;
+ uint8_t version; /* batman version field */
+ uint8_t flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
+ uint8_t tq;
+ uint32_t seqno;
+ uint8_t orig[6];
+ uint8_t prev_sender[6];
+ uint8_t ttl;
+ uint8_t num_hna;
+ uint8_t gw_flags; /* flags related to gateway class */
+ uint8_t align;
+} __attribute__((packed));
+
+#define BAT_PACKET_LEN sizeof(struct batman_packet)
+
+struct icmp_packet {
+ uint8_t packet_type;
+ uint8_t version; /* batman version field */
+ uint8_t msg_type; /* see ICMP message types above */
+ uint8_t ttl;
+ uint8_t dst[6];
+ uint8_t orig[6];
+ uint16_t seqno;
+ uint8_t uid;
+} __attribute__((packed));
+
+#define BAT_RR_LEN 16
+
+/* icmp_packet_rr must start with all fields from imcp_packet
+ * as this is assumed by code that handles ICMP packets */
+struct icmp_packet_rr {
+ uint8_t packet_type;
+ uint8_t version; /* batman version field */
+ uint8_t msg_type; /* see ICMP message types above */
+ uint8_t ttl;
+ uint8_t dst[6];
+ uint8_t orig[6];
+ uint16_t seqno;
+ uint8_t uid;
+ uint8_t rr_cur;
+ uint8_t rr[BAT_RR_LEN][ETH_ALEN];
+} __attribute__((packed));
+
+struct unicast_packet {
+ uint8_t packet_type;
+ uint8_t version; /* batman version field */
+ uint8_t dest[6];
+ uint8_t ttl;
+} __attribute__((packed));
+
+struct unicast_frag_packet {
+ uint8_t packet_type;
+ uint8_t version; /* batman version field */
+ uint8_t dest[6];
+ uint8_t ttl;
+ uint8_t flags;
+ uint8_t orig[6];
+ uint16_t seqno;
+} __attribute__((packed));
+
+struct bcast_packet {
+ uint8_t packet_type;
+ uint8_t version; /* batman version field */
+ uint8_t orig[6];
+ uint8_t ttl;
+ uint32_t seqno;
+} __attribute__((packed));
+
+struct vis_packet {
+ uint8_t packet_type;
+ uint8_t version; /* batman version field */
+ uint8_t vis_type; /* which type of vis-participant sent this? */
+ uint8_t entries; /* number of entries behind this struct */
+ uint32_t seqno; /* sequence number */
+ uint8_t ttl; /* TTL */
+ uint8_t vis_orig[6]; /* originator that informs about its
+ * neighbors */
+ uint8_t target_orig[6]; /* who should receive this packet */
+ uint8_t sender_orig[6]; /* who sent or rebroadcasted this packet */
+} __attribute__((packed));
+
+#endif /* _NET_BATMAN_ADV_PACKET_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "ring_buffer.h"
+
+void ring_buffer_set(uint8_t lq_recv[], uint8_t *lq_index, uint8_t value)
+{
+ lq_recv[*lq_index] = value;
+ *lq_index = (*lq_index + 1) % TQ_GLOBAL_WINDOW_SIZE;
+}
+
+uint8_t ring_buffer_avg(uint8_t lq_recv[])
+{
+ uint8_t *ptr;
+ uint16_t count = 0, i = 0, sum = 0;
+
+ ptr = lq_recv;
+
+ while (i < TQ_GLOBAL_WINDOW_SIZE) {
+ if (*ptr != 0) {
+ count++;
+ sum += *ptr;
+ }
+
+ i++;
+ ptr++;
+ }
+
+ if (count == 0)
+ return 0;
+
+ return (uint8_t)(sum / count);
+}
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_RING_BUFFER_H_
+#define _NET_BATMAN_ADV_RING_BUFFER_H_
+
+void ring_buffer_set(uint8_t lq_recv[], uint8_t *lq_index, uint8_t value);
+uint8_t ring_buffer_avg(uint8_t lq_recv[]);
+
+#endif /* _NET_BATMAN_ADV_RING_BUFFER_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "routing.h"
+#include "send.h"
+#include "hash.h"
+#include "soft-interface.h"
+#include "hard-interface.h"
+#include "icmp_socket.h"
+#include "translation-table.h"
+#include "originator.h"
+#include "types.h"
+#include "ring_buffer.h"
+#include "vis.h"
+#include "aggregation.h"
+#include "gateway_common.h"
+#include "gateway_client.h"
+#include "unicast.h"
+
+void slide_own_bcast_window(struct batman_if *batman_if)
+{
+ struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
+ struct hashtable_t *hash = bat_priv->orig_hash;
+ struct hlist_node *walk;
+ struct hlist_head *head;
+ struct element_t *bucket;
+ struct orig_node *orig_node;
+ unsigned long *word;
+ int i;
+ size_t word_index;
+
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry(bucket, walk, head, hlist) {
+ orig_node = bucket->data;
+ word_index = batman_if->if_num * NUM_WORDS;
+ word = &(orig_node->bcast_own[word_index]);
+
+ bit_get_packet(bat_priv, word, 1, 0);
+ orig_node->bcast_own_sum[batman_if->if_num] =
+ bit_packet_count(word);
+ }
+ }
+
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+}
+
+static void update_HNA(struct bat_priv *bat_priv, struct orig_node *orig_node,
+ unsigned char *hna_buff, int hna_buff_len)
+{
+ if ((hna_buff_len != orig_node->hna_buff_len) ||
+ ((hna_buff_len > 0) &&
+ (orig_node->hna_buff_len > 0) &&
+ (memcmp(orig_node->hna_buff, hna_buff, hna_buff_len) != 0))) {
+
+ if (orig_node->hna_buff_len > 0)
+ hna_global_del_orig(bat_priv, orig_node,
+ "originator changed hna");
+
+ if ((hna_buff_len > 0) && (hna_buff))
+ hna_global_add_orig(bat_priv, orig_node,
+ hna_buff, hna_buff_len);
+ }
+}
+
+static void update_route(struct bat_priv *bat_priv,
+ struct orig_node *orig_node,
+ struct neigh_node *neigh_node,
+ unsigned char *hna_buff, int hna_buff_len)
+{
+ /* route deleted */
+ if ((orig_node->router) && (!neigh_node)) {
+
+ bat_dbg(DBG_ROUTES, bat_priv, "Deleting route towards: %pM\n",
+ orig_node->orig);
+ hna_global_del_orig(bat_priv, orig_node,
+ "originator timed out");
+
+ /* route added */
+ } else if ((!orig_node->router) && (neigh_node)) {
+
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Adding route towards: %pM (via %pM)\n",
+ orig_node->orig, neigh_node->addr);
+ hna_global_add_orig(bat_priv, orig_node,
+ hna_buff, hna_buff_len);
+
+ /* route changed */
+ } else {
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Changing route towards: %pM "
+ "(now via %pM - was via %pM)\n",
+ orig_node->orig, neigh_node->addr,
+ orig_node->router->addr);
+ }
+
+ orig_node->router = neigh_node;
+}
+
+
+void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
+ struct neigh_node *neigh_node, unsigned char *hna_buff,
+ int hna_buff_len)
+{
+
+ if (!orig_node)
+ return;
+
+ if (orig_node->router != neigh_node)
+ update_route(bat_priv, orig_node, neigh_node,
+ hna_buff, hna_buff_len);
+ /* may be just HNA changed */
+ else
+ update_HNA(bat_priv, orig_node, hna_buff, hna_buff_len);
+}
+
+static int is_bidirectional_neigh(struct orig_node *orig_node,
+ struct orig_node *orig_neigh_node,
+ struct batman_packet *batman_packet,
+ struct batman_if *if_incoming)
+{
+ struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
+ struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
+ unsigned char total_count;
+
+ if (orig_node == orig_neigh_node) {
+ list_for_each_entry(tmp_neigh_node,
+ &orig_node->neigh_list,
+ list) {
+
+ if (compare_orig(tmp_neigh_node->addr,
+ orig_neigh_node->orig) &&
+ (tmp_neigh_node->if_incoming == if_incoming))
+ neigh_node = tmp_neigh_node;
+ }
+
+ if (!neigh_node)
+ neigh_node = create_neighbor(orig_node,
+ orig_neigh_node,
+ orig_neigh_node->orig,
+ if_incoming);
+ /* create_neighbor failed, return 0 */
+ if (!neigh_node)
+ return 0;
+
+ neigh_node->last_valid = jiffies;
+ } else {
+ /* find packet count of corresponding one hop neighbor */
+ list_for_each_entry(tmp_neigh_node,
+ &orig_neigh_node->neigh_list, list) {
+
+ if (compare_orig(tmp_neigh_node->addr,
+ orig_neigh_node->orig) &&
+ (tmp_neigh_node->if_incoming == if_incoming))
+ neigh_node = tmp_neigh_node;
+ }
+
+ if (!neigh_node)
+ neigh_node = create_neighbor(orig_neigh_node,
+ orig_neigh_node,
+ orig_neigh_node->orig,
+ if_incoming);
+ /* create_neighbor failed, return 0 */
+ if (!neigh_node)
+ return 0;
+ }
+
+ orig_node->last_valid = jiffies;
+
+ /* pay attention to not get a value bigger than 100 % */
+ total_count = (orig_neigh_node->bcast_own_sum[if_incoming->if_num] >
+ neigh_node->real_packet_count ?
+ neigh_node->real_packet_count :
+ orig_neigh_node->bcast_own_sum[if_incoming->if_num]);
+
+ /* if we have too few packets (too less data) we set tq_own to zero */
+ /* if we receive too few packets it is not considered bidirectional */
+ if ((total_count < TQ_LOCAL_BIDRECT_SEND_MINIMUM) ||
+ (neigh_node->real_packet_count < TQ_LOCAL_BIDRECT_RECV_MINIMUM))
+ orig_neigh_node->tq_own = 0;
+ else
+ /* neigh_node->real_packet_count is never zero as we
+ * only purge old information when getting new
+ * information */
+ orig_neigh_node->tq_own = (TQ_MAX_VALUE * total_count) /
+ neigh_node->real_packet_count;
+
+ /*
+ * 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does
+ * affect the nearly-symmetric links only a little, but
+ * punishes asymmetric links more. This will give a value
+ * between 0 and TQ_MAX_VALUE
+ */
+ orig_neigh_node->tq_asym_penalty =
+ TQ_MAX_VALUE -
+ (TQ_MAX_VALUE *
+ (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count) *
+ (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count) *
+ (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count)) /
+ (TQ_LOCAL_WINDOW_SIZE *
+ TQ_LOCAL_WINDOW_SIZE *
+ TQ_LOCAL_WINDOW_SIZE);
+
+ batman_packet->tq = ((batman_packet->tq *
+ orig_neigh_node->tq_own *
+ orig_neigh_node->tq_asym_penalty) /
+ (TQ_MAX_VALUE * TQ_MAX_VALUE));
+
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "bidirectional: "
+ "orig = %-15pM neigh = %-15pM => own_bcast = %2i, "
+ "real recv = %2i, local tq: %3i, asym_penalty: %3i, "
+ "total tq: %3i\n",
+ orig_node->orig, orig_neigh_node->orig, total_count,
+ neigh_node->real_packet_count, orig_neigh_node->tq_own,
+ orig_neigh_node->tq_asym_penalty, batman_packet->tq);
+
+ /* if link has the minimum required transmission quality
+ * consider it bidirectional */
+ if (batman_packet->tq >= TQ_TOTAL_BIDRECT_LIMIT)
+ return 1;
+
+ return 0;
+}
+
+static void update_orig(struct bat_priv *bat_priv,
+ struct orig_node *orig_node,
+ struct ethhdr *ethhdr,
+ struct batman_packet *batman_packet,
+ struct batman_if *if_incoming,
+ unsigned char *hna_buff, int hna_buff_len,
+ char is_duplicate)
+{
+ struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
+ int tmp_hna_buff_len;
+
+ bat_dbg(DBG_BATMAN, bat_priv, "update_originator(): "
+ "Searching and updating originator entry of received packet\n");
+
+ list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
+ if (compare_orig(tmp_neigh_node->addr, ethhdr->h_source) &&
+ (tmp_neigh_node->if_incoming == if_incoming)) {
+ neigh_node = tmp_neigh_node;
+ continue;
+ }
+
+ if (is_duplicate)
+ continue;
+
+ ring_buffer_set(tmp_neigh_node->tq_recv,
+ &tmp_neigh_node->tq_index, 0);
+ tmp_neigh_node->tq_avg =
+ ring_buffer_avg(tmp_neigh_node->tq_recv);
+ }
+
+ if (!neigh_node) {
+ struct orig_node *orig_tmp;
+
+ orig_tmp = get_orig_node(bat_priv, ethhdr->h_source);
+ if (!orig_tmp)
+ return;
+
+ neigh_node = create_neighbor(orig_node, orig_tmp,
+ ethhdr->h_source, if_incoming);
+ if (!neigh_node)
+ return;
+ } else
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Updating existing last-hop neighbor of originator\n");
+
+ orig_node->flags = batman_packet->flags;
+ neigh_node->last_valid = jiffies;
+
+ ring_buffer_set(neigh_node->tq_recv,
+ &neigh_node->tq_index,
+ batman_packet->tq);
+ neigh_node->tq_avg = ring_buffer_avg(neigh_node->tq_recv);
+
+ if (!is_duplicate) {
+ orig_node->last_ttl = batman_packet->ttl;
+ neigh_node->last_ttl = batman_packet->ttl;
+ }
+
+ tmp_hna_buff_len = (hna_buff_len > batman_packet->num_hna * ETH_ALEN ?
+ batman_packet->num_hna * ETH_ALEN : hna_buff_len);
+
+ /* if this neighbor already is our next hop there is nothing
+ * to change */
+ if (orig_node->router == neigh_node)
+ goto update_hna;
+
+ /* if this neighbor does not offer a better TQ we won't consider it */
+ if ((orig_node->router) &&
+ (orig_node->router->tq_avg > neigh_node->tq_avg))
+ goto update_hna;
+
+ /* if the TQ is the same and the link not more symetric we
+ * won't consider it either */
+ if ((orig_node->router) &&
+ ((neigh_node->tq_avg == orig_node->router->tq_avg) &&
+ (orig_node->router->orig_node->bcast_own_sum[if_incoming->if_num]
+ >= neigh_node->orig_node->bcast_own_sum[if_incoming->if_num])))
+ goto update_hna;
+
+ update_routes(bat_priv, orig_node, neigh_node,
+ hna_buff, tmp_hna_buff_len);
+ goto update_gw;
+
+update_hna:
+ update_routes(bat_priv, orig_node, orig_node->router,
+ hna_buff, tmp_hna_buff_len);
+
+update_gw:
+ if (orig_node->gw_flags != batman_packet->gw_flags)
+ gw_node_update(bat_priv, orig_node, batman_packet->gw_flags);
+
+ orig_node->gw_flags = batman_packet->gw_flags;
+
+ /* restart gateway selection if fast or late switching was enabled */
+ if ((orig_node->gw_flags) &&
+ (atomic_read(&bat_priv->gw_mode) == GW_MODE_CLIENT) &&
+ (atomic_read(&bat_priv->gw_sel_class) > 2))
+ gw_check_election(bat_priv, orig_node);
+}
+
+/* checks whether the host restarted and is in the protection time.
+ * returns:
+ * 0 if the packet is to be accepted
+ * 1 if the packet is to be ignored.
+ */
+static int window_protected(struct bat_priv *bat_priv,
+ int32_t seq_num_diff,
+ unsigned long *last_reset)
+{
+ if ((seq_num_diff <= -TQ_LOCAL_WINDOW_SIZE)
+ || (seq_num_diff >= EXPECTED_SEQNO_RANGE)) {
+ if (time_after(jiffies, *last_reset +
+ msecs_to_jiffies(RESET_PROTECTION_MS))) {
+
+ *last_reset = jiffies;
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "old packet received, start protection\n");
+
+ return 0;
+ } else
+ return 1;
+ }
+ return 0;
+}
+
+/* processes a batman packet for all interfaces, adjusts the sequence number and
+ * finds out whether it is a duplicate.
+ * returns:
+ * 1 the packet is a duplicate
+ * 0 the packet has not yet been received
+ * -1 the packet is old and has been received while the seqno window
+ * was protected. Caller should drop it.
+ */
+static char count_real_packets(struct ethhdr *ethhdr,
+ struct batman_packet *batman_packet,
+ struct batman_if *if_incoming)
+{
+ struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
+ struct orig_node *orig_node;
+ struct neigh_node *tmp_neigh_node;
+ char is_duplicate = 0;
+ int32_t seq_diff;
+ int need_update = 0;
+ int set_mark;
+
+ orig_node = get_orig_node(bat_priv, batman_packet->orig);
+ if (!orig_node)
+ return 0;
+
+ seq_diff = batman_packet->seqno - orig_node->last_real_seqno;
+
+ /* signalize caller that the packet is to be dropped. */
+ if (window_protected(bat_priv, seq_diff,
+ &orig_node->batman_seqno_reset))
+ return -1;
+
+ list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
+
+ is_duplicate |= get_bit_status(tmp_neigh_node->real_bits,
+ orig_node->last_real_seqno,
+ batman_packet->seqno);
+
+ if (compare_orig(tmp_neigh_node->addr, ethhdr->h_source) &&
+ (tmp_neigh_node->if_incoming == if_incoming))
+ set_mark = 1;
+ else
+ set_mark = 0;
+
+ /* if the window moved, set the update flag. */
+ need_update |= bit_get_packet(bat_priv,
+ tmp_neigh_node->real_bits,
+ seq_diff, set_mark);
+
+ tmp_neigh_node->real_packet_count =
+ bit_packet_count(tmp_neigh_node->real_bits);
+ }
+
+ if (need_update) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "updating last_seqno: old %d, new %d\n",
+ orig_node->last_real_seqno, batman_packet->seqno);
+ orig_node->last_real_seqno = batman_packet->seqno;
+ }
+
+ return is_duplicate;
+}
+
+/* copy primary address for bonding */
+static void mark_bonding_address(struct bat_priv *bat_priv,
+ struct orig_node *orig_node,
+ struct orig_node *orig_neigh_node,
+ struct batman_packet *batman_packet)
+
+{
+ if (batman_packet->flags & PRIMARIES_FIRST_HOP)
+ memcpy(orig_neigh_node->primary_addr,
+ orig_node->orig, ETH_ALEN);
+
+ return;
+}
+
+/* mark possible bond.candidates in the neighbor list */
+void update_bonding_candidates(struct bat_priv *bat_priv,
+ struct orig_node *orig_node)
+{
+ int candidates;
+ int interference_candidate;
+ int best_tq;
+ struct neigh_node *tmp_neigh_node, *tmp_neigh_node2;
+ struct neigh_node *first_candidate, *last_candidate;
+
+ /* update the candidates for this originator */
+ if (!orig_node->router) {
+ orig_node->bond.candidates = 0;
+ return;
+ }
+
+ best_tq = orig_node->router->tq_avg;
+
+ /* update bond.candidates */
+
+ candidates = 0;
+
+ /* mark other nodes which also received "PRIMARIES FIRST HOP" packets
+ * as "bonding partner" */
+
+ /* first, zero the list */
+ list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
+ tmp_neigh_node->next_bond_candidate = NULL;
+ }
+
+ first_candidate = NULL;
+ last_candidate = NULL;
+ list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
+
+ /* only consider if it has the same primary address ... */
+ if (memcmp(orig_node->orig,
+ tmp_neigh_node->orig_node->primary_addr,
+ ETH_ALEN) != 0)
+ continue;
+
+ /* ... and is good enough to be considered */
+ if (tmp_neigh_node->tq_avg < best_tq - BONDING_TQ_THRESHOLD)
+ continue;
+
+ /* check if we have another candidate with the same
+ * mac address or interface. If we do, we won't
+ * select this candidate because of possible interference. */
+
+ interference_candidate = 0;
+ list_for_each_entry(tmp_neigh_node2,
+ &orig_node->neigh_list, list) {
+
+ if (tmp_neigh_node2 == tmp_neigh_node)
+ continue;
+
+ /* we only care if the other candidate is even
+ * considered as candidate. */
+ if (!tmp_neigh_node2->next_bond_candidate)
+ continue;
+
+
+ if ((tmp_neigh_node->if_incoming ==
+ tmp_neigh_node2->if_incoming)
+ || (memcmp(tmp_neigh_node->addr,
+ tmp_neigh_node2->addr, ETH_ALEN) == 0)) {
+
+ interference_candidate = 1;
+ break;
+ }
+ }
+ /* don't care further if it is an interference candidate */
+ if (interference_candidate)
+ continue;
+
+ if (!first_candidate) {
+ first_candidate = tmp_neigh_node;
+ tmp_neigh_node->next_bond_candidate = first_candidate;
+ } else
+ tmp_neigh_node->next_bond_candidate = last_candidate;
+
+ last_candidate = tmp_neigh_node;
+
+ candidates++;
+ }
+
+ if (candidates > 0) {
+ first_candidate->next_bond_candidate = last_candidate;
+ orig_node->bond.selected = first_candidate;
+ }
+
+ orig_node->bond.candidates = candidates;
+}
+
+void receive_bat_packet(struct ethhdr *ethhdr,
+ struct batman_packet *batman_packet,
+ unsigned char *hna_buff, int hna_buff_len,
+ struct batman_if *if_incoming)
+{
+ struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
+ struct batman_if *batman_if;
+ struct orig_node *orig_neigh_node, *orig_node;
+ char has_directlink_flag;
+ char is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
+ char is_broadcast = 0, is_bidirectional, is_single_hop_neigh;
+ char is_duplicate;
+ uint32_t if_incoming_seqno;
+
+ /* Silently drop when the batman packet is actually not a
+ * correct packet.
+ *
+ * This might happen if a packet is padded (e.g. Ethernet has a
+ * minimum frame length of 64 byte) and the aggregation interprets
+ * it as an additional length.
+ *
+ * TODO: A more sane solution would be to have a bit in the
+ * batman_packet to detect whether the packet is the last
+ * packet in an aggregation. Here we expect that the padding
+ * is always zero (or not 0x01)
+ */
+ if (batman_packet->packet_type != BAT_PACKET)
+ return;
+
+ /* could be changed by schedule_own_packet() */
+ if_incoming_seqno = atomic_read(&if_incoming->seqno);
+
+ has_directlink_flag = (batman_packet->flags & DIRECTLINK ? 1 : 0);
+
+ is_single_hop_neigh = (compare_orig(ethhdr->h_source,
+ batman_packet->orig) ? 1 : 0);
+
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Received BATMAN packet via NB: %pM, IF: %s [%pM] "
+ "(from OG: %pM, via prev OG: %pM, seqno %d, tq %d, "
+ "TTL %d, V %d, IDF %d)\n",
+ ethhdr->h_source, if_incoming->net_dev->name,
+ if_incoming->net_dev->dev_addr, batman_packet->orig,
+ batman_packet->prev_sender, batman_packet->seqno,
+ batman_packet->tq, batman_packet->ttl, batman_packet->version,
+ has_directlink_flag);
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(batman_if, &if_list, list) {
+ if (batman_if->if_status != IF_ACTIVE)
+ continue;
+
+ if (batman_if->soft_iface != if_incoming->soft_iface)
+ continue;
+
+ if (compare_orig(ethhdr->h_source,
+ batman_if->net_dev->dev_addr))
+ is_my_addr = 1;
+
+ if (compare_orig(batman_packet->orig,
+ batman_if->net_dev->dev_addr))
+ is_my_orig = 1;
+
+ if (compare_orig(batman_packet->prev_sender,
+ batman_if->net_dev->dev_addr))
+ is_my_oldorig = 1;
+
+ if (compare_orig(ethhdr->h_source, broadcast_addr))
+ is_broadcast = 1;
+ }
+ rcu_read_unlock();
+
+ if (batman_packet->version != COMPAT_VERSION) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Drop packet: incompatible batman version (%i)\n",
+ batman_packet->version);
+ return;
+ }
+
+ if (is_my_addr) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Drop packet: received my own broadcast (sender: %pM"
+ ")\n",
+ ethhdr->h_source);
+ return;
+ }
+
+ if (is_broadcast) {
+ bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
+ "ignoring all packets with broadcast source addr (sender: %pM"
+ ")\n", ethhdr->h_source);
+ return;
+ }
+
+ if (is_my_orig) {
+ unsigned long *word;
+ int offset;
+
+ orig_neigh_node = get_orig_node(bat_priv, ethhdr->h_source);
+
+ if (!orig_neigh_node)
+ return;
+
+ /* neighbor has to indicate direct link and it has to
+ * come via the corresponding interface */
+ /* if received seqno equals last send seqno save new
+ * seqno for bidirectional check */
+ if (has_directlink_flag &&
+ compare_orig(if_incoming->net_dev->dev_addr,
+ batman_packet->orig) &&
+ (batman_packet->seqno - if_incoming_seqno + 2 == 0)) {
+ offset = if_incoming->if_num * NUM_WORDS;
+ word = &(orig_neigh_node->bcast_own[offset]);
+ bit_mark(word, 0);
+ orig_neigh_node->bcast_own_sum[if_incoming->if_num] =
+ bit_packet_count(word);
+ }
+
+ bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
+ "originator packet from myself (via neighbor)\n");
+ return;
+ }
+
+ if (is_my_oldorig) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Drop packet: ignoring all rebroadcast echos (sender: "
+ "%pM)\n", ethhdr->h_source);
+ return;
+ }
+
+ orig_node = get_orig_node(bat_priv, batman_packet->orig);
+ if (!orig_node)
+ return;
+
+ is_duplicate = count_real_packets(ethhdr, batman_packet, if_incoming);
+
+ if (is_duplicate == -1) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Drop packet: packet within seqno protection time "
+ "(sender: %pM)\n", ethhdr->h_source);
+ return;
+ }
+
+ if (batman_packet->tq == 0) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Drop packet: originator packet with tq equal 0\n");
+ return;
+ }
+
+ /* avoid temporary routing loops */
+ if ((orig_node->router) &&
+ (orig_node->router->orig_node->router) &&
+ (compare_orig(orig_node->router->addr,
+ batman_packet->prev_sender)) &&
+ !(compare_orig(batman_packet->orig, batman_packet->prev_sender)) &&
+ (compare_orig(orig_node->router->addr,
+ orig_node->router->orig_node->router->addr))) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Drop packet: ignoring all rebroadcast packets that "
+ "may make me loop (sender: %pM)\n", ethhdr->h_source);
+ return;
+ }
+
+ /* if sender is a direct neighbor the sender mac equals
+ * originator mac */
+ orig_neigh_node = (is_single_hop_neigh ?
+ orig_node :
+ get_orig_node(bat_priv, ethhdr->h_source));
+ if (!orig_neigh_node)
+ return;
+
+ /* drop packet if sender is not a direct neighbor and if we
+ * don't route towards it */
+ if (!is_single_hop_neigh && (!orig_neigh_node->router)) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Drop packet: OGM via unknown neighbor!\n");
+ return;
+ }
+
+ is_bidirectional = is_bidirectional_neigh(orig_node, orig_neigh_node,
+ batman_packet, if_incoming);
+
+ /* update ranking if it is not a duplicate or has the same
+ * seqno and similar ttl as the non-duplicate */
+ if (is_bidirectional &&
+ (!is_duplicate ||
+ ((orig_node->last_real_seqno == batman_packet->seqno) &&
+ (orig_node->last_ttl - 3 <= batman_packet->ttl))))
+ update_orig(bat_priv, orig_node, ethhdr, batman_packet,
+ if_incoming, hna_buff, hna_buff_len, is_duplicate);
+
+ mark_bonding_address(bat_priv, orig_node,
+ orig_neigh_node, batman_packet);
+ update_bonding_candidates(bat_priv, orig_node);
+
+ /* is single hop (direct) neighbor */
+ if (is_single_hop_neigh) {
+
+ /* mark direct link on incoming interface */
+ schedule_forward_packet(orig_node, ethhdr, batman_packet,
+ 1, hna_buff_len, if_incoming);
+
+ bat_dbg(DBG_BATMAN, bat_priv, "Forwarding packet: "
+ "rebroadcast neighbor packet with direct link flag\n");
+ return;
+ }
+
+ /* multihop originator */
+ if (!is_bidirectional) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Drop packet: not received via bidirectional link\n");
+ return;
+ }
+
+ if (is_duplicate) {
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Drop packet: duplicate packet received\n");
+ return;
+ }
+
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Forwarding packet: rebroadcast originator packet\n");
+ schedule_forward_packet(orig_node, ethhdr, batman_packet,
+ 0, hna_buff_len, if_incoming);
+}
+
+int recv_bat_packet(struct sk_buff *skb, struct batman_if *batman_if)
+{
+ struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
+ struct ethhdr *ethhdr;
+
+ /* drop packet if it has not necessary minimum size */
+ if (unlikely(!pskb_may_pull(skb, sizeof(struct batman_packet))))
+ return NET_RX_DROP;
+
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ /* packet with broadcast indication but unicast recipient */
+ if (!is_broadcast_ether_addr(ethhdr->h_dest))
+ return NET_RX_DROP;
+
+ /* packet with broadcast sender address */
+ if (is_broadcast_ether_addr(ethhdr->h_source))
+ return NET_RX_DROP;
+
+ /* create a copy of the skb, if needed, to modify it. */
+ if (skb_cow(skb, 0) < 0)
+ return NET_RX_DROP;
+
+ /* keep skb linear */
+ if (skb_linearize(skb) < 0)
+ return NET_RX_DROP;
+
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+ receive_aggr_bat_packet(ethhdr,
+ skb->data,
+ skb_headlen(skb),
+ batman_if);
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ kfree_skb(skb);
+ return NET_RX_SUCCESS;
+}
+
+static int recv_my_icmp_packet(struct bat_priv *bat_priv,
+ struct sk_buff *skb, size_t icmp_len)
+{
+ struct orig_node *orig_node;
+ struct icmp_packet_rr *icmp_packet;
+ struct ethhdr *ethhdr;
+ struct batman_if *batman_if;
+ int ret;
+ uint8_t dstaddr[ETH_ALEN];
+
+ icmp_packet = (struct icmp_packet_rr *)skb->data;
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ /* add data to device queue */
+ if (icmp_packet->msg_type != ECHO_REQUEST) {
+ bat_socket_receive_packet(icmp_packet, icmp_len);
+ return NET_RX_DROP;
+ }
+
+ if (!bat_priv->primary_if)
+ return NET_RX_DROP;
+
+ /* answer echo request (ping) */
+ /* get routing information */
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+ orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
+ compare_orig, choose_orig,
+ icmp_packet->orig));
+ ret = NET_RX_DROP;
+
+ if ((orig_node) && (orig_node->router)) {
+
+ /* don't lock while sending the packets ... we therefore
+ * copy the required data before sending */
+ batman_if = orig_node->router->if_incoming;
+ memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ /* create a copy of the skb, if needed, to modify it. */
+ if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+ return NET_RX_DROP;
+
+ icmp_packet = (struct icmp_packet_rr *)skb->data;
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
+ memcpy(icmp_packet->orig,
+ bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+ icmp_packet->msg_type = ECHO_REPLY;
+ icmp_packet->ttl = TTL;
+
+ send_skb_packet(skb, batman_if, dstaddr);
+ ret = NET_RX_SUCCESS;
+
+ } else
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ return ret;
+}
+
+static int recv_icmp_ttl_exceeded(struct bat_priv *bat_priv,
+ struct sk_buff *skb, size_t icmp_len)
+{
+ struct orig_node *orig_node;
+ struct icmp_packet *icmp_packet;
+ struct ethhdr *ethhdr;
+ struct batman_if *batman_if;
+ int ret;
+ uint8_t dstaddr[ETH_ALEN];
+
+ icmp_packet = (struct icmp_packet *)skb->data;
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ /* send TTL exceeded if packet is an echo request (traceroute) */
+ if (icmp_packet->msg_type != ECHO_REQUEST) {
+ pr_debug("Warning - can't forward icmp packet from %pM to "
+ "%pM: ttl exceeded\n", icmp_packet->orig,
+ icmp_packet->dst);
+ return NET_RX_DROP;
+ }
+
+ if (!bat_priv->primary_if)
+ return NET_RX_DROP;
+
+ /* get routing information */
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+ orig_node = ((struct orig_node *)
+ hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
+ icmp_packet->orig));
+ ret = NET_RX_DROP;
+
+ if ((orig_node) && (orig_node->router)) {
+
+ /* don't lock while sending the packets ... we therefore
+ * copy the required data before sending */
+ batman_if = orig_node->router->if_incoming;
+ memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ /* create a copy of the skb, if needed, to modify it. */
+ if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+ return NET_RX_DROP;
+
+ icmp_packet = (struct icmp_packet *) skb->data;
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
+ memcpy(icmp_packet->orig,
+ bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+ icmp_packet->msg_type = TTL_EXCEEDED;
+ icmp_packet->ttl = TTL;
+
+ send_skb_packet(skb, batman_if, dstaddr);
+ ret = NET_RX_SUCCESS;
+
+ } else
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ return ret;
+}
+
+
+int recv_icmp_packet(struct sk_buff *skb, struct batman_if *recv_if)
+{
+ struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
+ struct icmp_packet_rr *icmp_packet;
+ struct ethhdr *ethhdr;
+ struct orig_node *orig_node;
+ struct batman_if *batman_if;
+ int hdr_size = sizeof(struct icmp_packet);
+ int ret;
+ uint8_t dstaddr[ETH_ALEN];
+
+ /**
+ * we truncate all incoming icmp packets if they don't match our size
+ */
+ if (skb->len >= sizeof(struct icmp_packet_rr))
+ hdr_size = sizeof(struct icmp_packet_rr);
+
+ /* drop packet if it has not necessary minimum size */
+ if (unlikely(!pskb_may_pull(skb, hdr_size)))
+ return NET_RX_DROP;
+
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ /* packet with unicast indication but broadcast recipient */
+ if (is_broadcast_ether_addr(ethhdr->h_dest))
+ return NET_RX_DROP;
+
+ /* packet with broadcast sender address */
+ if (is_broadcast_ether_addr(ethhdr->h_source))
+ return NET_RX_DROP;
+
+ /* not for me */
+ if (!is_my_mac(ethhdr->h_dest))
+ return NET_RX_DROP;
+
+ icmp_packet = (struct icmp_packet_rr *)skb->data;
+
+ /* add record route information if not full */
+ if ((hdr_size == sizeof(struct icmp_packet_rr)) &&
+ (icmp_packet->rr_cur < BAT_RR_LEN)) {
+ memcpy(&(icmp_packet->rr[icmp_packet->rr_cur]),
+ ethhdr->h_dest, ETH_ALEN);
+ icmp_packet->rr_cur++;
+ }
+
+ /* packet for me */
+ if (is_my_mac(icmp_packet->dst))
+ return recv_my_icmp_packet(bat_priv, skb, hdr_size);
+
+ /* TTL exceeded */
+ if (icmp_packet->ttl < 2)
+ return recv_icmp_ttl_exceeded(bat_priv, skb, hdr_size);
+
+ ret = NET_RX_DROP;
+
+ /* get routing information */
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+ orig_node = ((struct orig_node *)
+ hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
+ icmp_packet->dst));
+
+ if ((orig_node) && (orig_node->router)) {
+
+ /* don't lock while sending the packets ... we therefore
+ * copy the required data before sending */
+ batman_if = orig_node->router->if_incoming;
+ memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ /* create a copy of the skb, if needed, to modify it. */
+ if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+ return NET_RX_DROP;
+
+ icmp_packet = (struct icmp_packet_rr *)skb->data;
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ /* decrement ttl */
+ icmp_packet->ttl--;
+
+ /* route it */
+ send_skb_packet(skb, batman_if, dstaddr);
+ ret = NET_RX_SUCCESS;
+
+ } else
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ return ret;
+}
+
+/* find a suitable router for this originator, and use
+ * bonding if possible. */
+struct neigh_node *find_router(struct bat_priv *bat_priv,
+ struct orig_node *orig_node,
+ struct batman_if *recv_if)
+{
+ struct orig_node *primary_orig_node;
+ struct orig_node *router_orig;
+ struct neigh_node *router, *first_candidate, *best_router;
+ static uint8_t zero_mac[ETH_ALEN] = {0, 0, 0, 0, 0, 0};
+ int bonding_enabled;
+
+ if (!orig_node)
+ return NULL;
+
+ if (!orig_node->router)
+ return NULL;
+
+ /* without bonding, the first node should
+ * always choose the default router. */
+
+ bonding_enabled = atomic_read(&bat_priv->bonding);
+
+ if ((!recv_if) && (!bonding_enabled))
+ return orig_node->router;
+
+ router_orig = orig_node->router->orig_node;
+
+ /* if we have something in the primary_addr, we can search
+ * for a potential bonding candidate. */
+ if (memcmp(router_orig->primary_addr, zero_mac, ETH_ALEN) == 0)
+ return orig_node->router;
+
+ /* find the orig_node which has the primary interface. might
+ * even be the same as our router_orig in many cases */
+
+ if (memcmp(router_orig->primary_addr,
+ router_orig->orig, ETH_ALEN) == 0) {
+ primary_orig_node = router_orig;
+ } else {
+ primary_orig_node = hash_find(bat_priv->orig_hash, compare_orig,
+ choose_orig,
+ router_orig->primary_addr);
+
+ if (!primary_orig_node)
+ return orig_node->router;
+ }
+
+ /* with less than 2 candidates, we can't do any
+ * bonding and prefer the original router. */
+
+ if (primary_orig_node->bond.candidates < 2)
+ return orig_node->router;
+
+
+ /* all nodes between should choose a candidate which
+ * is is not on the interface where the packet came
+ * in. */
+ first_candidate = primary_orig_node->bond.selected;
+ router = first_candidate;
+
+ if (bonding_enabled) {
+ /* in the bonding case, send the packets in a round
+ * robin fashion over the remaining interfaces. */
+ do {
+ /* recv_if == NULL on the first node. */
+ if (router->if_incoming != recv_if)
+ break;
+
+ router = router->next_bond_candidate;
+ } while (router != first_candidate);
+
+ primary_orig_node->bond.selected = router->next_bond_candidate;
+
+ } else {
+ /* if bonding is disabled, use the best of the
+ * remaining candidates which are not using
+ * this interface. */
+ best_router = first_candidate;
+
+ do {
+ /* recv_if == NULL on the first node. */
+ if ((router->if_incoming != recv_if) &&
+ (router->tq_avg > best_router->tq_avg))
+ best_router = router;
+
+ router = router->next_bond_candidate;
+ } while (router != first_candidate);
+
+ router = best_router;
+ }
+
+ return router;
+}
+
+static int check_unicast_packet(struct sk_buff *skb, int hdr_size)
+{
+ struct ethhdr *ethhdr;
+
+ /* drop packet if it has not necessary minimum size */
+ if (unlikely(!pskb_may_pull(skb, hdr_size)))
+ return -1;
+
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ /* packet with unicast indication but broadcast recipient */
+ if (is_broadcast_ether_addr(ethhdr->h_dest))
+ return -1;
+
+ /* packet with broadcast sender address */
+ if (is_broadcast_ether_addr(ethhdr->h_source))
+ return -1;
+
+ /* not for me */
+ if (!is_my_mac(ethhdr->h_dest))
+ return -1;
+
+ return 0;
+}
+
+int route_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if,
+ int hdr_size)
+{
+ struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
+ struct orig_node *orig_node;
+ struct neigh_node *router;
+ struct batman_if *batman_if;
+ uint8_t dstaddr[ETH_ALEN];
+ struct unicast_packet *unicast_packet;
+ struct ethhdr *ethhdr = (struct ethhdr *)skb_mac_header(skb);
+ int ret;
+ struct sk_buff *new_skb;
+
+ unicast_packet = (struct unicast_packet *)skb->data;
+
+ /* TTL exceeded */
+ if (unicast_packet->ttl < 2) {
+ pr_debug("Warning - can't forward unicast packet from %pM to "
+ "%pM: ttl exceeded\n", ethhdr->h_source,
+ unicast_packet->dest);
+ return NET_RX_DROP;
+ }
+
+ /* get routing information */
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+ orig_node = ((struct orig_node *)
+ hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
+ unicast_packet->dest));
+
+ router = find_router(bat_priv, orig_node, recv_if);
+
+ if (!router) {
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+ return NET_RX_DROP;
+ }
+
+ /* don't lock while sending the packets ... we therefore
+ * copy the required data before sending */
+
+ batman_if = router->if_incoming;
+ memcpy(dstaddr, router->addr, ETH_ALEN);
+
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ /* create a copy of the skb, if needed, to modify it. */
+ if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+ return NET_RX_DROP;
+
+ unicast_packet = (struct unicast_packet *)skb->data;
+
+ if (unicast_packet->packet_type == BAT_UNICAST &&
+ atomic_read(&bat_priv->fragmentation) &&
+ skb->len > batman_if->net_dev->mtu)
+ return frag_send_skb(skb, bat_priv, batman_if,
+ dstaddr);
+
+ if (unicast_packet->packet_type == BAT_UNICAST_FRAG &&
+ 2 * skb->len - hdr_size <= batman_if->net_dev->mtu) {
+
+ ret = frag_reassemble_skb(skb, bat_priv, &new_skb);
+
+ if (ret == NET_RX_DROP)
+ return NET_RX_DROP;
+
+ /* packet was buffered for late merge */
+ if (!new_skb)
+ return NET_RX_SUCCESS;
+
+ skb = new_skb;
+ unicast_packet = (struct unicast_packet *)skb->data;
+ }
+
+ /* decrement ttl */
+ unicast_packet->ttl--;
+
+ /* route it */
+ send_skb_packet(skb, batman_if, dstaddr);
+
+ return NET_RX_SUCCESS;
+}
+
+int recv_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if)
+{
+ struct unicast_packet *unicast_packet;
+ int hdr_size = sizeof(struct unicast_packet);
+
+ if (check_unicast_packet(skb, hdr_size) < 0)
+ return NET_RX_DROP;
+
+ unicast_packet = (struct unicast_packet *)skb->data;
+
+ /* packet for me */
+ if (is_my_mac(unicast_packet->dest)) {
+ interface_rx(recv_if->soft_iface, skb, recv_if, hdr_size);
+ return NET_RX_SUCCESS;
+ }
+
+ return route_unicast_packet(skb, recv_if, hdr_size);
+}
+
+int recv_ucast_frag_packet(struct sk_buff *skb, struct batman_if *recv_if)
+{
+ struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
+ struct unicast_frag_packet *unicast_packet;
+ int hdr_size = sizeof(struct unicast_frag_packet);
+ struct sk_buff *new_skb = NULL;
+ int ret;
+
+ if (check_unicast_packet(skb, hdr_size) < 0)
+ return NET_RX_DROP;
+
+ unicast_packet = (struct unicast_frag_packet *)skb->data;
+
+ /* packet for me */
+ if (is_my_mac(unicast_packet->dest)) {
+
+ ret = frag_reassemble_skb(skb, bat_priv, &new_skb);
+
+ if (ret == NET_RX_DROP)
+ return NET_RX_DROP;
+
+ /* packet was buffered for late merge */
+ if (!new_skb)
+ return NET_RX_SUCCESS;
+
+ interface_rx(recv_if->soft_iface, new_skb, recv_if,
+ sizeof(struct unicast_packet));
+ return NET_RX_SUCCESS;
+ }
+
+ return route_unicast_packet(skb, recv_if, hdr_size);
+}
+
+
+int recv_bcast_packet(struct sk_buff *skb, struct batman_if *recv_if)
+{
+ struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
+ struct orig_node *orig_node;
+ struct bcast_packet *bcast_packet;
+ struct ethhdr *ethhdr;
+ int hdr_size = sizeof(struct bcast_packet);
+ int32_t seq_diff;
+
+ /* drop packet if it has not necessary minimum size */
+ if (unlikely(!pskb_may_pull(skb, hdr_size)))
+ return NET_RX_DROP;
+
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ /* packet with broadcast indication but unicast recipient */
+ if (!is_broadcast_ether_addr(ethhdr->h_dest))
+ return NET_RX_DROP;
+
+ /* packet with broadcast sender address */
+ if (is_broadcast_ether_addr(ethhdr->h_source))
+ return NET_RX_DROP;
+
+ /* ignore broadcasts sent by myself */
+ if (is_my_mac(ethhdr->h_source))
+ return NET_RX_DROP;
+
+ bcast_packet = (struct bcast_packet *)skb->data;
+
+ /* ignore broadcasts originated by myself */
+ if (is_my_mac(bcast_packet->orig))
+ return NET_RX_DROP;
+
+ if (bcast_packet->ttl < 2)
+ return NET_RX_DROP;
+
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+ orig_node = ((struct orig_node *)
+ hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
+ bcast_packet->orig));
+
+ if (!orig_node) {
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+ return NET_RX_DROP;
+ }
+
+ /* check whether the packet is a duplicate */
+ if (get_bit_status(orig_node->bcast_bits,
+ orig_node->last_bcast_seqno,
+ ntohl(bcast_packet->seqno))) {
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+ return NET_RX_DROP;
+ }
+
+ seq_diff = ntohl(bcast_packet->seqno) - orig_node->last_bcast_seqno;
+
+ /* check whether the packet is old and the host just restarted. */
+ if (window_protected(bat_priv, seq_diff,
+ &orig_node->bcast_seqno_reset)) {
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+ return NET_RX_DROP;
+ }
+
+ /* mark broadcast in flood history, update window position
+ * if required. */
+ if (bit_get_packet(bat_priv, orig_node->bcast_bits, seq_diff, 1))
+ orig_node->last_bcast_seqno = ntohl(bcast_packet->seqno);
+
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+ /* rebroadcast packet */
+ add_bcast_packet_to_list(bat_priv, skb);
+
+ /* broadcast for me */
+ interface_rx(recv_if->soft_iface, skb, recv_if, hdr_size);
+
+ return NET_RX_SUCCESS;
+}
+
+int recv_vis_packet(struct sk_buff *skb, struct batman_if *recv_if)
+{
+ struct vis_packet *vis_packet;
+ struct ethhdr *ethhdr;
+ struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
+ int hdr_size = sizeof(struct vis_packet);
+
+ /* keep skb linear */
+ if (skb_linearize(skb) < 0)
+ return NET_RX_DROP;
+
+ if (unlikely(!pskb_may_pull(skb, hdr_size)))
+ return NET_RX_DROP;
+
+ vis_packet = (struct vis_packet *)skb->data;
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ /* not for me */
+ if (!is_my_mac(ethhdr->h_dest))
+ return NET_RX_DROP;
+
+ /* ignore own packets */
+ if (is_my_mac(vis_packet->vis_orig))
+ return NET_RX_DROP;
+
+ if (is_my_mac(vis_packet->sender_orig))
+ return NET_RX_DROP;
+
+ switch (vis_packet->vis_type) {
+ case VIS_TYPE_SERVER_SYNC:
+ receive_server_sync_packet(bat_priv, vis_packet,
+ skb_headlen(skb));
+ break;
+
+ case VIS_TYPE_CLIENT_UPDATE:
+ receive_client_update_packet(bat_priv, vis_packet,
+ skb_headlen(skb));
+ break;
+
+ default: /* ignore unknown packet */
+ break;
+ }
+
+ /* We take a copy of the data in the packet, so we should
+ always free the skbuf. */
+ return NET_RX_DROP;
+}
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_ROUTING_H_
+#define _NET_BATMAN_ADV_ROUTING_H_
+
+#include "types.h"
+
+void slide_own_bcast_window(struct batman_if *batman_if);
+void receive_bat_packet(struct ethhdr *ethhdr,
+ struct batman_packet *batman_packet,
+ unsigned char *hna_buff, int hna_buff_len,
+ struct batman_if *if_incoming);
+void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
+ struct neigh_node *neigh_node, unsigned char *hna_buff,
+ int hna_buff_len);
+int route_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if,
+ int hdr_size);
+int recv_icmp_packet(struct sk_buff *skb, struct batman_if *recv_if);
+int recv_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if);
+int recv_ucast_frag_packet(struct sk_buff *skb, struct batman_if *recv_if);
+int recv_bcast_packet(struct sk_buff *skb, struct batman_if *recv_if);
+int recv_vis_packet(struct sk_buff *skb, struct batman_if *recv_if);
+int recv_bat_packet(struct sk_buff *skb, struct batman_if *recv_if);
+struct neigh_node *find_router(struct bat_priv *bat_priv,
+ struct orig_node *orig_node, struct batman_if *recv_if);
+void update_bonding_candidates(struct bat_priv *bat_priv,
+ struct orig_node *orig_node);
+
+#endif /* _NET_BATMAN_ADV_ROUTING_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "send.h"
+#include "routing.h"
+#include "translation-table.h"
+#include "soft-interface.h"
+#include "hard-interface.h"
+#include "types.h"
+#include "vis.h"
+#include "aggregation.h"
+#include "gateway_common.h"
+#include "originator.h"
+
+static void send_outstanding_bcast_packet(struct work_struct *work);
+
+/* apply hop penalty for a normal link */
+static uint8_t hop_penalty(const uint8_t tq, struct bat_priv *bat_priv)
+{
+ int hop_penalty = atomic_read(&bat_priv->hop_penalty);
+ return (tq * (TQ_MAX_VALUE - hop_penalty)) / (TQ_MAX_VALUE);
+}
+
+/* when do we schedule our own packet to be sent */
+static unsigned long own_send_time(struct bat_priv *bat_priv)
+{
+ return jiffies + msecs_to_jiffies(
+ atomic_read(&bat_priv->orig_interval) -
+ JITTER + (random32() % 2*JITTER));
+}
+
+/* when do we schedule a forwarded packet to be sent */
+static unsigned long forward_send_time(struct bat_priv *bat_priv)
+{
+ return jiffies + msecs_to_jiffies(random32() % (JITTER/2));
+}
+
+/* send out an already prepared packet to the given address via the
+ * specified batman interface */
+int send_skb_packet(struct sk_buff *skb,
+ struct batman_if *batman_if,
+ uint8_t *dst_addr)
+{
+ struct ethhdr *ethhdr;
+
+ if (batman_if->if_status != IF_ACTIVE)
+ goto send_skb_err;
+
+ if (unlikely(!batman_if->net_dev))
+ goto send_skb_err;
+
+ if (!(batman_if->net_dev->flags & IFF_UP)) {
+ pr_warning("Interface %s is not up - can't send packet via "
+ "that interface!\n", batman_if->net_dev->name);
+ goto send_skb_err;
+ }
+
+ /* push to the ethernet header. */
+ if (my_skb_head_push(skb, sizeof(struct ethhdr)) < 0)
+ goto send_skb_err;
+
+ skb_reset_mac_header(skb);
+
+ ethhdr = (struct ethhdr *) skb_mac_header(skb);
+ memcpy(ethhdr->h_source, batman_if->net_dev->dev_addr, ETH_ALEN);
+ memcpy(ethhdr->h_dest, dst_addr, ETH_ALEN);
+ ethhdr->h_proto = __constant_htons(ETH_P_BATMAN);
+
+ skb_set_network_header(skb, ETH_HLEN);
+ skb->priority = TC_PRIO_CONTROL;
+ skb->protocol = __constant_htons(ETH_P_BATMAN);
+
+ skb->dev = batman_if->net_dev;
+
+ /* dev_queue_xmit() returns a negative result on error. However on
+ * congestion and traffic shaping, it drops and returns NET_XMIT_DROP
+ * (which is > 0). This will not be treated as an error. */
+
+ return dev_queue_xmit(skb);
+send_skb_err:
+ kfree_skb(skb);
+ return NET_XMIT_DROP;
+}
+
+/* Send a packet to a given interface */
+static void send_packet_to_if(struct forw_packet *forw_packet,
+ struct batman_if *batman_if)
+{
+ struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
+ char *fwd_str;
+ uint8_t packet_num;
+ int16_t buff_pos;
+ struct batman_packet *batman_packet;
+ struct sk_buff *skb;
+
+ if (batman_if->if_status != IF_ACTIVE)
+ return;
+
+ packet_num = 0;
+ buff_pos = 0;
+ batman_packet = (struct batman_packet *)forw_packet->skb->data;
+
+ /* adjust all flags and log packets */
+ while (aggregated_packet(buff_pos,
+ forw_packet->packet_len,
+ batman_packet->num_hna)) {
+
+ /* we might have aggregated direct link packets with an
+ * ordinary base packet */
+ if ((forw_packet->direct_link_flags & (1 << packet_num)) &&
+ (forw_packet->if_incoming == batman_if))
+ batman_packet->flags |= DIRECTLINK;
+ else
+ batman_packet->flags &= ~DIRECTLINK;
+
+ fwd_str = (packet_num > 0 ? "Forwarding" : (forw_packet->own ?
+ "Sending own" :
+ "Forwarding"));
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "%s %spacket (originator %pM, seqno %d, TQ %d, TTL %d,"
+ " IDF %s) on interface %s [%pM]\n",
+ fwd_str, (packet_num > 0 ? "aggregated " : ""),
+ batman_packet->orig, ntohl(batman_packet->seqno),
+ batman_packet->tq, batman_packet->ttl,
+ (batman_packet->flags & DIRECTLINK ?
+ "on" : "off"),
+ batman_if->net_dev->name, batman_if->net_dev->dev_addr);
+
+ buff_pos += sizeof(struct batman_packet) +
+ (batman_packet->num_hna * ETH_ALEN);
+ packet_num++;
+ batman_packet = (struct batman_packet *)
+ (forw_packet->skb->data + buff_pos);
+ }
+
+ /* create clone because function is called more than once */
+ skb = skb_clone(forw_packet->skb, GFP_ATOMIC);
+ if (skb)
+ send_skb_packet(skb, batman_if, broadcast_addr);
+}
+
+/* send a batman packet */
+static void send_packet(struct forw_packet *forw_packet)
+{
+ struct batman_if *batman_if;
+ struct net_device *soft_iface;
+ struct bat_priv *bat_priv;
+ struct batman_packet *batman_packet =
+ (struct batman_packet *)(forw_packet->skb->data);
+ unsigned char directlink = (batman_packet->flags & DIRECTLINK ? 1 : 0);
+
+ if (!forw_packet->if_incoming) {
+ pr_err("Error - can't forward packet: incoming iface not "
+ "specified\n");
+ return;
+ }
+
+ soft_iface = forw_packet->if_incoming->soft_iface;
+ bat_priv = netdev_priv(soft_iface);
+
+ if (forw_packet->if_incoming->if_status != IF_ACTIVE)
+ return;
+
+ /* multihomed peer assumed */
+ /* non-primary OGMs are only broadcasted on their interface */
+ if ((directlink && (batman_packet->ttl == 1)) ||
+ (forw_packet->own && (forw_packet->if_incoming->if_num > 0))) {
+
+ /* FIXME: what about aggregated packets ? */
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "%s packet (originator %pM, seqno %d, TTL %d) "
+ "on interface %s [%pM]\n",
+ (forw_packet->own ? "Sending own" : "Forwarding"),
+ batman_packet->orig, ntohl(batman_packet->seqno),
+ batman_packet->ttl,
+ forw_packet->if_incoming->net_dev->name,
+ forw_packet->if_incoming->net_dev->dev_addr);
+
+ /* skb is only used once and than forw_packet is free'd */
+ send_skb_packet(forw_packet->skb, forw_packet->if_incoming,
+ broadcast_addr);
+ forw_packet->skb = NULL;
+
+ return;
+ }
+
+ /* broadcast on every interface */
+ rcu_read_lock();
+ list_for_each_entry_rcu(batman_if, &if_list, list) {
+ if (batman_if->soft_iface != soft_iface)
+ continue;
+
+ send_packet_to_if(forw_packet, batman_if);
+ }
+ rcu_read_unlock();
+}
+
+static void rebuild_batman_packet(struct bat_priv *bat_priv,
+ struct batman_if *batman_if)
+{
+ int new_len;
+ unsigned char *new_buff;
+ struct batman_packet *batman_packet;
+
+ new_len = sizeof(struct batman_packet) +
+ (bat_priv->num_local_hna * ETH_ALEN);
+ new_buff = kmalloc(new_len, GFP_ATOMIC);
+
+ /* keep old buffer if kmalloc should fail */
+ if (new_buff) {
+ memcpy(new_buff, batman_if->packet_buff,
+ sizeof(struct batman_packet));
+ batman_packet = (struct batman_packet *)new_buff;
+
+ batman_packet->num_hna = hna_local_fill_buffer(bat_priv,
+ new_buff + sizeof(struct batman_packet),
+ new_len - sizeof(struct batman_packet));
+
+ kfree(batman_if->packet_buff);
+ batman_if->packet_buff = new_buff;
+ batman_if->packet_len = new_len;
+ }
+}
+
+void schedule_own_packet(struct batman_if *batman_if)
+{
+ struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
+ unsigned long send_time;
+ struct batman_packet *batman_packet;
+ int vis_server;
+
+ if ((batman_if->if_status == IF_NOT_IN_USE) ||
+ (batman_if->if_status == IF_TO_BE_REMOVED))
+ return;
+
+ vis_server = atomic_read(&bat_priv->vis_mode);
+
+ /**
+ * the interface gets activated here to avoid race conditions between
+ * the moment of activating the interface in
+ * hardif_activate_interface() where the originator mac is set and
+ * outdated packets (especially uninitialized mac addresses) in the
+ * packet queue
+ */
+ if (batman_if->if_status == IF_TO_BE_ACTIVATED)
+ batman_if->if_status = IF_ACTIVE;
+
+ /* if local hna has changed and interface is a primary interface */
+ if ((atomic_read(&bat_priv->hna_local_changed)) &&
+ (batman_if == bat_priv->primary_if))
+ rebuild_batman_packet(bat_priv, batman_if);
+
+ /**
+ * NOTE: packet_buff might just have been re-allocated in
+ * rebuild_batman_packet()
+ */
+ batman_packet = (struct batman_packet *)batman_if->packet_buff;
+
+ /* change sequence number to network order */
+ batman_packet->seqno =
+ htonl((uint32_t)atomic_read(&batman_if->seqno));
+
+ if (vis_server == VIS_TYPE_SERVER_SYNC)
+ batman_packet->flags |= VIS_SERVER;
+ else
+ batman_packet->flags &= ~VIS_SERVER;
+
+ if ((batman_if == bat_priv->primary_if) &&
+ (atomic_read(&bat_priv->gw_mode) == GW_MODE_SERVER))
+ batman_packet->gw_flags =
+ (uint8_t)atomic_read(&bat_priv->gw_bandwidth);
+ else
+ batman_packet->gw_flags = 0;
+
+ atomic_inc(&batman_if->seqno);
+
+ slide_own_bcast_window(batman_if);
+ send_time = own_send_time(bat_priv);
+ add_bat_packet_to_list(bat_priv,
+ batman_if->packet_buff,
+ batman_if->packet_len,
+ batman_if, 1, send_time);
+}
+
+void schedule_forward_packet(struct orig_node *orig_node,
+ struct ethhdr *ethhdr,
+ struct batman_packet *batman_packet,
+ uint8_t directlink, int hna_buff_len,
+ struct batman_if *if_incoming)
+{
+ struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
+ unsigned char in_tq, in_ttl, tq_avg = 0;
+ unsigned long send_time;
+
+ if (batman_packet->ttl <= 1) {
+ bat_dbg(DBG_BATMAN, bat_priv, "ttl exceeded\n");
+ return;
+ }
+
+ in_tq = batman_packet->tq;
+ in_ttl = batman_packet->ttl;
+
+ batman_packet->ttl--;
+ memcpy(batman_packet->prev_sender, ethhdr->h_source, ETH_ALEN);
+
+ /* rebroadcast tq of our best ranking neighbor to ensure the rebroadcast
+ * of our best tq value */
+ if ((orig_node->router) && (orig_node->router->tq_avg != 0)) {
+
+ /* rebroadcast ogm of best ranking neighbor as is */
+ if (!compare_orig(orig_node->router->addr, ethhdr->h_source)) {
+ batman_packet->tq = orig_node->router->tq_avg;
+
+ if (orig_node->router->last_ttl)
+ batman_packet->ttl = orig_node->router->last_ttl
+ - 1;
+ }
+
+ tq_avg = orig_node->router->tq_avg;
+ }
+
+ /* apply hop penalty */
+ batman_packet->tq = hop_penalty(batman_packet->tq, bat_priv);
+
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Forwarding packet: tq_orig: %i, tq_avg: %i, "
+ "tq_forw: %i, ttl_orig: %i, ttl_forw: %i\n",
+ in_tq, tq_avg, batman_packet->tq, in_ttl - 1,
+ batman_packet->ttl);
+
+ batman_packet->seqno = htonl(batman_packet->seqno);
+
+ /* switch of primaries first hop flag when forwarding */
+ batman_packet->flags &= ~PRIMARIES_FIRST_HOP;
+ if (directlink)
+ batman_packet->flags |= DIRECTLINK;
+ else
+ batman_packet->flags &= ~DIRECTLINK;
+
+ send_time = forward_send_time(bat_priv);
+ add_bat_packet_to_list(bat_priv,
+ (unsigned char *)batman_packet,
+ sizeof(struct batman_packet) + hna_buff_len,
+ if_incoming, 0, send_time);
+}
+
+static void forw_packet_free(struct forw_packet *forw_packet)
+{
+ if (forw_packet->skb)
+ kfree_skb(forw_packet->skb);
+ kfree(forw_packet);
+}
+
+static void _add_bcast_packet_to_list(struct bat_priv *bat_priv,
+ struct forw_packet *forw_packet,
+ unsigned long send_time)
+{
+ INIT_HLIST_NODE(&forw_packet->list);
+
+ /* add new packet to packet list */
+ spin_lock_bh(&bat_priv->forw_bcast_list_lock);
+ hlist_add_head(&forw_packet->list, &bat_priv->forw_bcast_list);
+ spin_unlock_bh(&bat_priv->forw_bcast_list_lock);
+
+ /* start timer for this packet */
+ INIT_DELAYED_WORK(&forw_packet->delayed_work,
+ send_outstanding_bcast_packet);
+ queue_delayed_work(bat_event_workqueue, &forw_packet->delayed_work,
+ send_time);
+}
+
+#define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0)
+/* add a broadcast packet to the queue and setup timers. broadcast packets
+ * are sent multiple times to increase probability for beeing received.
+ *
+ * This function returns NETDEV_TX_OK on success and NETDEV_TX_BUSY on
+ * errors.
+ *
+ * The skb is not consumed, so the caller should make sure that the
+ * skb is freed. */
+int add_bcast_packet_to_list(struct bat_priv *bat_priv, struct sk_buff *skb)
+{
+ struct forw_packet *forw_packet;
+ struct bcast_packet *bcast_packet;
+
+ if (!atomic_dec_not_zero(&bat_priv->bcast_queue_left)) {
+ bat_dbg(DBG_BATMAN, bat_priv, "bcast packet queue full\n");
+ goto out;
+ }
+
+ if (!bat_priv->primary_if)
+ goto out;
+
+ forw_packet = kmalloc(sizeof(struct forw_packet), GFP_ATOMIC);
+
+ if (!forw_packet)
+ goto out_and_inc;
+
+ skb = skb_copy(skb, GFP_ATOMIC);
+ if (!skb)
+ goto packet_free;
+
+ /* as we have a copy now, it is safe to decrease the TTL */
+ bcast_packet = (struct bcast_packet *)skb->data;
+ bcast_packet->ttl--;
+
+ skb_reset_mac_header(skb);
+
+ forw_packet->skb = skb;
+ forw_packet->if_incoming = bat_priv->primary_if;
+
+ /* how often did we send the bcast packet ? */
+ forw_packet->num_packets = 0;
+
+ _add_bcast_packet_to_list(bat_priv, forw_packet, 1);
+ return NETDEV_TX_OK;
+
+packet_free:
+ kfree(forw_packet);
+out_and_inc:
+ atomic_inc(&bat_priv->bcast_queue_left);
+out:
+ return NETDEV_TX_BUSY;
+}
+
+static void send_outstanding_bcast_packet(struct work_struct *work)
+{
+ struct batman_if *batman_if;
+ struct delayed_work *delayed_work =
+ container_of(work, struct delayed_work, work);
+ struct forw_packet *forw_packet =
+ container_of(delayed_work, struct forw_packet, delayed_work);
+ struct sk_buff *skb1;
+ struct net_device *soft_iface = forw_packet->if_incoming->soft_iface;
+ struct bat_priv *bat_priv = netdev_priv(soft_iface);
+
+ spin_lock_bh(&bat_priv->forw_bcast_list_lock);
+ hlist_del(&forw_packet->list);
+ spin_unlock_bh(&bat_priv->forw_bcast_list_lock);
+
+ if (atomic_read(&bat_priv->mesh_state) == MESH_DEACTIVATING)
+ goto out;
+
+ /* rebroadcast packet */
+ rcu_read_lock();
+ list_for_each_entry_rcu(batman_if, &if_list, list) {
+ if (batman_if->soft_iface != soft_iface)
+ continue;
+
+ /* send a copy of the saved skb */
+ skb1 = skb_clone(forw_packet->skb, GFP_ATOMIC);
+ if (skb1)
+ send_skb_packet(skb1, batman_if, broadcast_addr);
+ }
+ rcu_read_unlock();
+
+ forw_packet->num_packets++;
+
+ /* if we still have some more bcasts to send */
+ if (forw_packet->num_packets < 3) {
+ _add_bcast_packet_to_list(bat_priv, forw_packet,
+ ((5 * HZ) / 1000));
+ return;
+ }
+
+out:
+ forw_packet_free(forw_packet);
+ atomic_inc(&bat_priv->bcast_queue_left);
+}
+
+void send_outstanding_bat_packet(struct work_struct *work)
+{
+ struct delayed_work *delayed_work =
+ container_of(work, struct delayed_work, work);
+ struct forw_packet *forw_packet =
+ container_of(delayed_work, struct forw_packet, delayed_work);
+ struct bat_priv *bat_priv;
+
+ bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface);
+ spin_lock_bh(&bat_priv->forw_bat_list_lock);
+ hlist_del(&forw_packet->list);
+ spin_unlock_bh(&bat_priv->forw_bat_list_lock);
+
+ if (atomic_read(&bat_priv->mesh_state) == MESH_DEACTIVATING)
+ goto out;
+
+ send_packet(forw_packet);
+
+ /**
+ * we have to have at least one packet in the queue
+ * to determine the queues wake up time unless we are
+ * shutting down
+ */
+ if (forw_packet->own)
+ schedule_own_packet(forw_packet->if_incoming);
+
+out:
+ /* don't count own packet */
+ if (!forw_packet->own)
+ atomic_inc(&bat_priv->batman_queue_left);
+
+ forw_packet_free(forw_packet);
+}
+
+void purge_outstanding_packets(struct bat_priv *bat_priv,
+ struct batman_if *batman_if)
+{
+ struct forw_packet *forw_packet;
+ struct hlist_node *tmp_node, *safe_tmp_node;
+
+ if (batman_if)
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "purge_outstanding_packets(): %s\n",
+ batman_if->net_dev->name);
+ else
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "purge_outstanding_packets()\n");
+
+ /* free bcast list */
+ spin_lock_bh(&bat_priv->forw_bcast_list_lock);
+ hlist_for_each_entry_safe(forw_packet, tmp_node, safe_tmp_node,
+ &bat_priv->forw_bcast_list, list) {
+
+ /**
+ * if purge_outstanding_packets() was called with an argmument
+ * we delete only packets belonging to the given interface
+ */
+ if ((batman_if) &&
+ (forw_packet->if_incoming != batman_if))
+ continue;
+
+ spin_unlock_bh(&bat_priv->forw_bcast_list_lock);
+
+ /**
+ * send_outstanding_bcast_packet() will lock the list to
+ * delete the item from the list
+ */
+ cancel_delayed_work_sync(&forw_packet->delayed_work);
+ spin_lock_bh(&bat_priv->forw_bcast_list_lock);
+ }
+ spin_unlock_bh(&bat_priv->forw_bcast_list_lock);
+
+ /* free batman packet list */
+ spin_lock_bh(&bat_priv->forw_bat_list_lock);
+ hlist_for_each_entry_safe(forw_packet, tmp_node, safe_tmp_node,
+ &bat_priv->forw_bat_list, list) {
+
+ /**
+ * if purge_outstanding_packets() was called with an argmument
+ * we delete only packets belonging to the given interface
+ */
+ if ((batman_if) &&
+ (forw_packet->if_incoming != batman_if))
+ continue;
+
+ spin_unlock_bh(&bat_priv->forw_bat_list_lock);
+
+ /**
+ * send_outstanding_bat_packet() will lock the list to
+ * delete the item from the list
+ */
+ cancel_delayed_work_sync(&forw_packet->delayed_work);
+ spin_lock_bh(&bat_priv->forw_bat_list_lock);
+ }
+ spin_unlock_bh(&bat_priv->forw_bat_list_lock);
+}
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_SEND_H_
+#define _NET_BATMAN_ADV_SEND_H_
+
+#include "types.h"
+
+int send_skb_packet(struct sk_buff *skb,
+ struct batman_if *batman_if,
+ uint8_t *dst_addr);
+void schedule_own_packet(struct batman_if *batman_if);
+void schedule_forward_packet(struct orig_node *orig_node,
+ struct ethhdr *ethhdr,
+ struct batman_packet *batman_packet,
+ uint8_t directlink, int hna_buff_len,
+ struct batman_if *if_outgoing);
+int add_bcast_packet_to_list(struct bat_priv *bat_priv, struct sk_buff *skb);
+void send_outstanding_bat_packet(struct work_struct *work);
+void purge_outstanding_packets(struct bat_priv *bat_priv,
+ struct batman_if *batman_if);
+
+#endif /* _NET_BATMAN_ADV_SEND_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "soft-interface.h"
+#include "hard-interface.h"
+#include "routing.h"
+#include "send.h"
+#include "bat_debugfs.h"
+#include "translation-table.h"
+#include "types.h"
+#include "hash.h"
+#include "gateway_common.h"
+#include "gateway_client.h"
+#include "send.h"
+#include "bat_sysfs.h"
+#include <linux/slab.h>
+#include <linux/ethtool.h>
+#include <linux/etherdevice.h>
+#include <linux/if_vlan.h>
+#include "unicast.h"
+#include "routing.h"
+
+
+static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
+static void bat_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info);
+static u32 bat_get_msglevel(struct net_device *dev);
+static void bat_set_msglevel(struct net_device *dev, u32 value);
+static u32 bat_get_link(struct net_device *dev);
+static u32 bat_get_rx_csum(struct net_device *dev);
+static int bat_set_rx_csum(struct net_device *dev, u32 data);
+
+static const struct ethtool_ops bat_ethtool_ops = {
+ .get_settings = bat_get_settings,
+ .get_drvinfo = bat_get_drvinfo,
+ .get_msglevel = bat_get_msglevel,
+ .set_msglevel = bat_set_msglevel,
+ .get_link = bat_get_link,
+ .get_rx_csum = bat_get_rx_csum,
+ .set_rx_csum = bat_set_rx_csum
+};
+
+int my_skb_head_push(struct sk_buff *skb, unsigned int len)
+{
+ int result;
+
+ /**
+ * TODO: We must check if we can release all references to non-payload
+ * data using skb_header_release in our skbs to allow skb_cow_header to
+ * work optimally. This means that those skbs are not allowed to read
+ * or write any data which is before the current position of skb->data
+ * after that call and thus allow other skbs with the same data buffer
+ * to write freely in that area.
+ */
+ result = skb_cow_head(skb, len);
+ if (result < 0)
+ return result;
+
+ skb_push(skb, len);
+ return 0;
+}
+
+static void softif_neigh_free_ref(struct kref *refcount)
+{
+ struct softif_neigh *softif_neigh;
+
+ softif_neigh = container_of(refcount, struct softif_neigh, refcount);
+ kfree(softif_neigh);
+}
+
+static void softif_neigh_free_rcu(struct rcu_head *rcu)
+{
+ struct softif_neigh *softif_neigh;
+
+ softif_neigh = container_of(rcu, struct softif_neigh, rcu);
+ kref_put(&softif_neigh->refcount, softif_neigh_free_ref);
+}
+
+void softif_neigh_purge(struct bat_priv *bat_priv)
+{
+ struct softif_neigh *softif_neigh, *softif_neigh_tmp;
+ struct hlist_node *node, *node_tmp;
+
+ spin_lock_bh(&bat_priv->softif_neigh_lock);
+
+ hlist_for_each_entry_safe(softif_neigh, node, node_tmp,
+ &bat_priv->softif_neigh_list, list) {
+
+ if ((!time_after(jiffies, softif_neigh->last_seen +
+ msecs_to_jiffies(SOFTIF_NEIGH_TIMEOUT))) &&
+ (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE))
+ continue;
+
+ hlist_del_rcu(&softif_neigh->list);
+
+ if (bat_priv->softif_neigh == softif_neigh) {
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Current mesh exit point '%pM' vanished "
+ "(vid: %d).\n",
+ softif_neigh->addr, softif_neigh->vid);
+ softif_neigh_tmp = bat_priv->softif_neigh;
+ bat_priv->softif_neigh = NULL;
+ kref_put(&softif_neigh_tmp->refcount,
+ softif_neigh_free_ref);
+ }
+
+ call_rcu(&softif_neigh->rcu, softif_neigh_free_rcu);
+ }
+
+ spin_unlock_bh(&bat_priv->softif_neigh_lock);
+}
+
+static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
+ uint8_t *addr, short vid)
+{
+ struct softif_neigh *softif_neigh;
+ struct hlist_node *node;
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(softif_neigh, node,
+ &bat_priv->softif_neigh_list, list) {
+ if (memcmp(softif_neigh->addr, addr, ETH_ALEN) != 0)
+ continue;
+
+ if (softif_neigh->vid != vid)
+ continue;
+
+ softif_neigh->last_seen = jiffies;
+ goto found;
+ }
+
+ softif_neigh = kzalloc(sizeof(struct softif_neigh), GFP_ATOMIC);
+ if (!softif_neigh)
+ goto out;
+
+ memcpy(softif_neigh->addr, addr, ETH_ALEN);
+ softif_neigh->vid = vid;
+ softif_neigh->last_seen = jiffies;
+ kref_init(&softif_neigh->refcount);
+
+ INIT_HLIST_NODE(&softif_neigh->list);
+ spin_lock_bh(&bat_priv->softif_neigh_lock);
+ hlist_add_head_rcu(&softif_neigh->list, &bat_priv->softif_neigh_list);
+ spin_unlock_bh(&bat_priv->softif_neigh_lock);
+
+found:
+ kref_get(&softif_neigh->refcount);
+out:
+ rcu_read_unlock();
+ return softif_neigh;
+}
+
+int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
+{
+ struct net_device *net_dev = (struct net_device *)seq->private;
+ struct bat_priv *bat_priv = netdev_priv(net_dev);
+ struct softif_neigh *softif_neigh;
+ struct hlist_node *node;
+ size_t buf_size, pos;
+ char *buff;
+
+ if (!bat_priv->primary_if) {
+ return seq_printf(seq, "BATMAN mesh %s disabled - "
+ "please specify interfaces to enable it\n",
+ net_dev->name);
+ }
+
+ seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
+
+ buf_size = 1;
+ /* Estimate length for: " xx:xx:xx:xx:xx:xx\n" */
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(softif_neigh, node,
+ &bat_priv->softif_neigh_list, list)
+ buf_size += 30;
+ rcu_read_unlock();
+
+ buff = kmalloc(buf_size, GFP_ATOMIC);
+ if (!buff)
+ return -ENOMEM;
+
+ buff[0] = '\0';
+ pos = 0;
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(softif_neigh, node,
+ &bat_priv->softif_neigh_list, list) {
+ pos += snprintf(buff + pos, 31, "%s %pM (vid: %d)\n",
+ bat_priv->softif_neigh == softif_neigh
+ ? "=>" : " ", softif_neigh->addr,
+ softif_neigh->vid);
+ }
+ rcu_read_unlock();
+
+ seq_printf(seq, "%s", buff);
+ kfree(buff);
+ return 0;
+}
+
+static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
+ short vid)
+{
+ struct bat_priv *bat_priv = netdev_priv(dev);
+ struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
+ struct batman_packet *batman_packet;
+ struct softif_neigh *softif_neigh, *softif_neigh_tmp;
+
+ if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
+ batman_packet = (struct batman_packet *)
+ (skb->data + ETH_HLEN + VLAN_HLEN);
+ else
+ batman_packet = (struct batman_packet *)(skb->data + ETH_HLEN);
+
+ if (batman_packet->version != COMPAT_VERSION)
+ goto err;
+
+ if (batman_packet->packet_type != BAT_PACKET)
+ goto err;
+
+ if (!(batman_packet->flags & PRIMARIES_FIRST_HOP))
+ goto err;
+
+ if (is_my_mac(batman_packet->orig))
+ goto err;
+
+ softif_neigh = softif_neigh_get(bat_priv, batman_packet->orig, vid);
+
+ if (!softif_neigh)
+ goto err;
+
+ if (bat_priv->softif_neigh == softif_neigh)
+ goto out;
+
+ /* we got a neighbor but its mac is 'bigger' than ours */
+ if (memcmp(bat_priv->primary_if->net_dev->dev_addr,
+ softif_neigh->addr, ETH_ALEN) < 0)
+ goto out;
+
+ /* switch to new 'smallest neighbor' */
+ if ((bat_priv->softif_neigh) &&
+ (memcmp(softif_neigh->addr, bat_priv->softif_neigh->addr,
+ ETH_ALEN) < 0)) {
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Changing mesh exit point from %pM (vid: %d) "
+ "to %pM (vid: %d).\n",
+ bat_priv->softif_neigh->addr,
+ bat_priv->softif_neigh->vid,
+ softif_neigh->addr, softif_neigh->vid);
+ softif_neigh_tmp = bat_priv->softif_neigh;
+ bat_priv->softif_neigh = softif_neigh;
+ kref_put(&softif_neigh_tmp->refcount, softif_neigh_free_ref);
+ /* we need to hold the additional reference */
+ goto err;
+ }
+
+ /* close own batX device and use softif_neigh as exit node */
+ if ((!bat_priv->softif_neigh) &&
+ (memcmp(softif_neigh->addr,
+ bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN) < 0)) {
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Setting mesh exit point to %pM (vid: %d).\n",
+ softif_neigh->addr, softif_neigh->vid);
+ bat_priv->softif_neigh = softif_neigh;
+ /* we need to hold the additional reference */
+ goto err;
+ }
+
+out:
+ kref_put(&softif_neigh->refcount, softif_neigh_free_ref);
+err:
+ kfree_skb(skb);
+ return;
+}
+
+static int interface_open(struct net_device *dev)
+{
+ netif_start_queue(dev);
+ return 0;
+}
+
+static int interface_release(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ return 0;
+}
+
+static struct net_device_stats *interface_stats(struct net_device *dev)
+{
+ struct bat_priv *bat_priv = netdev_priv(dev);
+ return &bat_priv->stats;
+}
+
+static int interface_set_mac_addr(struct net_device *dev, void *p)
+{
+ struct bat_priv *bat_priv = netdev_priv(dev);
+ struct sockaddr *addr = p;
+
+ if (!is_valid_ether_addr(addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ /* only modify hna-table if it has been initialised before */
+ if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
+ hna_local_remove(bat_priv, dev->dev_addr,
+ "mac address changed");
+ hna_local_add(dev, addr->sa_data);
+ }
+
+ memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
+ return 0;
+}
+
+static int interface_change_mtu(struct net_device *dev, int new_mtu)
+{
+ /* check ranges */
+ if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev)))
+ return -EINVAL;
+
+ dev->mtu = new_mtu;
+
+ return 0;
+}
+
+int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
+{
+ struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
+ struct bat_priv *bat_priv = netdev_priv(soft_iface);
+ struct bcast_packet *bcast_packet;
+ struct vlan_ethhdr *vhdr;
+ int data_len = skb->len, ret;
+ short vid = -1;
+ bool do_bcast = false;
+
+ if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
+ goto dropped;
+
+ soft_iface->trans_start = jiffies;
+
+ switch (ntohs(ethhdr->h_proto)) {
+ case ETH_P_8021Q:
+ vhdr = (struct vlan_ethhdr *)skb->data;
+ vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
+
+ if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
+ break;
+
+ /* fall through */
+ case ETH_P_BATMAN:
+ softif_batman_recv(skb, soft_iface, vid);
+ goto end;
+ }
+
+ /**
+ * if we have a another chosen mesh exit node in range
+ * it will transport the packets to the mesh
+ */
+ if ((bat_priv->softif_neigh) && (bat_priv->softif_neigh->vid == vid))
+ goto dropped;
+
+ /* TODO: check this for locks */
+ hna_local_add(soft_iface, ethhdr->h_source);
+
+ if (is_multicast_ether_addr(ethhdr->h_dest)) {
+ ret = gw_is_target(bat_priv, skb);
+
+ if (ret < 0)
+ goto dropped;
+
+ if (ret == 0)
+ do_bcast = true;
+ }
+
+ /* ethernet packet should be broadcasted */
+ if (do_bcast) {
+ if (!bat_priv->primary_if)
+ goto dropped;
+
+ if (my_skb_head_push(skb, sizeof(struct bcast_packet)) < 0)
+ goto dropped;
+
+ bcast_packet = (struct bcast_packet *)skb->data;
+ bcast_packet->version = COMPAT_VERSION;
+ bcast_packet->ttl = TTL;
+
+ /* batman packet type: broadcast */
+ bcast_packet->packet_type = BAT_BCAST;
+
+ /* hw address of first interface is the orig mac because only
+ * this mac is known throughout the mesh */
+ memcpy(bcast_packet->orig,
+ bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+
+ /* set broadcast sequence number */
+ bcast_packet->seqno =
+ htonl(atomic_inc_return(&bat_priv->bcast_seqno));
+
+ add_bcast_packet_to_list(bat_priv, skb);
+
+ /* a copy is stored in the bcast list, therefore removing
+ * the original skb. */
+ kfree_skb(skb);
+
+ /* unicast packet */
+ } else {
+ ret = unicast_send_skb(skb, bat_priv);
+ if (ret != 0)
+ goto dropped_freed;
+ }
+
+ bat_priv->stats.tx_packets++;
+ bat_priv->stats.tx_bytes += data_len;
+ goto end;
+
+dropped:
+ kfree_skb(skb);
+dropped_freed:
+ bat_priv->stats.tx_dropped++;
+end:
+ return NETDEV_TX_OK;
+}
+
+void interface_rx(struct net_device *soft_iface,
+ struct sk_buff *skb, struct batman_if *recv_if,
+ int hdr_size)
+{
+ struct bat_priv *bat_priv = netdev_priv(soft_iface);
+ struct unicast_packet *unicast_packet;
+ struct ethhdr *ethhdr;
+ struct vlan_ethhdr *vhdr;
+ short vid = -1;
+ int ret;
+
+ /* check if enough space is available for pulling, and pull */
+ if (!pskb_may_pull(skb, hdr_size))
+ goto dropped;
+
+ skb_pull_rcsum(skb, hdr_size);
+ skb_reset_mac_header(skb);
+
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+
+ switch (ntohs(ethhdr->h_proto)) {
+ case ETH_P_8021Q:
+ vhdr = (struct vlan_ethhdr *)skb->data;
+ vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
+
+ if (ntohs(vhdr->h_vlan_encapsulated_proto) != ETH_P_BATMAN)
+ break;
+
+ /* fall through */
+ case ETH_P_BATMAN:
+ goto dropped;
+ }
+
+ /**
+ * if we have a another chosen mesh exit node in range
+ * it will transport the packets to the non-mesh network
+ */
+ if ((bat_priv->softif_neigh) && (bat_priv->softif_neigh->vid == vid)) {
+ skb_push(skb, hdr_size);
+ unicast_packet = (struct unicast_packet *)skb->data;
+
+ if ((unicast_packet->packet_type != BAT_UNICAST) &&
+ (unicast_packet->packet_type != BAT_UNICAST_FRAG))
+ goto dropped;
+
+ skb_reset_mac_header(skb);
+
+ memcpy(unicast_packet->dest,
+ bat_priv->softif_neigh->addr, ETH_ALEN);
+ ret = route_unicast_packet(skb, recv_if, hdr_size);
+ if (ret == NET_RX_DROP)
+ goto dropped;
+
+ goto out;
+ }
+
+ /* skb->dev & skb->pkt_type are set here */
+ if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
+ goto dropped;
+ skb->protocol = eth_type_trans(skb, soft_iface);
+
+ /* should not be neccesary anymore as we use skb_pull_rcsum()
+ * TODO: please verify this and remove this TODO
+ * -- Dec 21st 2009, Simon Wunderlich */
+
+/* skb->ip_summed = CHECKSUM_UNNECESSARY;*/
+
+ bat_priv->stats.rx_packets++;
+ bat_priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
+
+ soft_iface->last_rx = jiffies;
+
+ netif_rx(skb);
+ return;
+
+dropped:
+ kfree_skb(skb);
+out:
+ return;
+}
+
+#ifdef HAVE_NET_DEVICE_OPS
+static const struct net_device_ops bat_netdev_ops = {
+ .ndo_open = interface_open,
+ .ndo_stop = interface_release,
+ .ndo_get_stats = interface_stats,
+ .ndo_set_mac_address = interface_set_mac_addr,
+ .ndo_change_mtu = interface_change_mtu,
+ .ndo_start_xmit = interface_tx,
+ .ndo_validate_addr = eth_validate_addr
+};
+#endif
+
+static void interface_setup(struct net_device *dev)
+{
+ struct bat_priv *priv = netdev_priv(dev);
+ char dev_addr[ETH_ALEN];
+
+ ether_setup(dev);
+
+#ifdef HAVE_NET_DEVICE_OPS
+ dev->netdev_ops = &bat_netdev_ops;
+#else
+ dev->open = interface_open;
+ dev->stop = interface_release;
+ dev->get_stats = interface_stats;
+ dev->set_mac_address = interface_set_mac_addr;
+ dev->change_mtu = interface_change_mtu;
+ dev->hard_start_xmit = interface_tx;
+#endif
+ dev->destructor = free_netdev;
+
+ /**
+ * can't call min_mtu, because the needed variables
+ * have not been initialized yet
+ */
+ dev->mtu = ETH_DATA_LEN;
+ dev->hard_header_len = BAT_HEADER_LEN; /* reserve more space in the
+ * skbuff for our header */
+
+ /* generate random address */
+ random_ether_addr(dev_addr);
+ memcpy(dev->dev_addr, dev_addr, ETH_ALEN);
+
+ SET_ETHTOOL_OPS(dev, &bat_ethtool_ops);
+
+ memset(priv, 0, sizeof(struct bat_priv));
+}
+
+struct net_device *softif_create(char *name)
+{
+ struct net_device *soft_iface;
+ struct bat_priv *bat_priv;
+ int ret;
+
+ soft_iface = alloc_netdev(sizeof(struct bat_priv) , name,
+ interface_setup);
+
+ if (!soft_iface) {
+ pr_err("Unable to allocate the batman interface: %s\n", name);
+ goto out;
+ }
+
+ ret = register_netdev(soft_iface);
+ if (ret < 0) {
+ pr_err("Unable to register the batman interface '%s': %i\n",
+ name, ret);
+ goto free_soft_iface;
+ }
+
+ bat_priv = netdev_priv(soft_iface);
+
+ atomic_set(&bat_priv->aggregated_ogms, 1);
+ atomic_set(&bat_priv->bonding, 0);
+ atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE);
+ atomic_set(&bat_priv->gw_mode, GW_MODE_OFF);
+ atomic_set(&bat_priv->gw_sel_class, 20);
+ atomic_set(&bat_priv->gw_bandwidth, 41);
+ atomic_set(&bat_priv->orig_interval, 1000);
+ atomic_set(&bat_priv->hop_penalty, 10);
+ atomic_set(&bat_priv->log_level, 0);
+ atomic_set(&bat_priv->fragmentation, 1);
+ atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN);
+ atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN);
+
+ atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
+ atomic_set(&bat_priv->bcast_seqno, 1);
+ atomic_set(&bat_priv->hna_local_changed, 0);
+
+ bat_priv->primary_if = NULL;
+ bat_priv->num_ifaces = 0;
+ bat_priv->softif_neigh = NULL;
+
+ ret = sysfs_add_meshif(soft_iface);
+ if (ret < 0)
+ goto unreg_soft_iface;
+
+ ret = debugfs_add_meshif(soft_iface);
+ if (ret < 0)
+ goto unreg_sysfs;
+
+ ret = mesh_init(soft_iface);
+ if (ret < 0)
+ goto unreg_debugfs;
+
+ return soft_iface;
+
+unreg_debugfs:
+ debugfs_del_meshif(soft_iface);
+unreg_sysfs:
+ sysfs_del_meshif(soft_iface);
+unreg_soft_iface:
+ unregister_netdev(soft_iface);
+ return NULL;
+
+free_soft_iface:
+ free_netdev(soft_iface);
+out:
+ return NULL;
+}
+
+void softif_destroy(struct net_device *soft_iface)
+{
+ debugfs_del_meshif(soft_iface);
+ sysfs_del_meshif(soft_iface);
+ mesh_free(soft_iface);
+ unregister_netdevice(soft_iface);
+}
+
+/* ethtool */
+static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ cmd->supported = 0;
+ cmd->advertising = 0;
+ cmd->speed = SPEED_10;
+ cmd->duplex = DUPLEX_FULL;
+ cmd->port = PORT_TP;
+ cmd->phy_address = 0;
+ cmd->transceiver = XCVR_INTERNAL;
+ cmd->autoneg = AUTONEG_DISABLE;
+ cmd->maxtxpkt = 0;
+ cmd->maxrxpkt = 0;
+
+ return 0;
+}
+
+static void bat_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
+{
+ strcpy(info->driver, "B.A.T.M.A.N. advanced");
+ strcpy(info->version, SOURCE_VERSION);
+ strcpy(info->fw_version, "N/A");
+ strcpy(info->bus_info, "batman");
+}
+
+static u32 bat_get_msglevel(struct net_device *dev)
+{
+ return -EOPNOTSUPP;
+}
+
+static void bat_set_msglevel(struct net_device *dev, u32 value)
+{
+}
+
+static u32 bat_get_link(struct net_device *dev)
+{
+ return 1;
+}
+
+static u32 bat_get_rx_csum(struct net_device *dev)
+{
+ return 0;
+}
+
+static int bat_set_rx_csum(struct net_device *dev, u32 data)
+{
+ return -EOPNOTSUPP;
+}
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_SOFT_INTERFACE_H_
+#define _NET_BATMAN_ADV_SOFT_INTERFACE_H_
+
+int my_skb_head_push(struct sk_buff *skb, unsigned int len);
+int softif_neigh_seq_print_text(struct seq_file *seq, void *offset);
+void softif_neigh_purge(struct bat_priv *bat_priv);
+int interface_tx(struct sk_buff *skb, struct net_device *soft_iface);
+void interface_rx(struct net_device *soft_iface,
+ struct sk_buff *skb, struct batman_if *recv_if,
+ int hdr_size);
+struct net_device *softif_create(char *name);
+void softif_destroy(struct net_device *soft_iface);
+
+#endif /* _NET_BATMAN_ADV_SOFT_INTERFACE_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "translation-table.h"
+#include "soft-interface.h"
+#include "types.h"
+#include "hash.h"
+#include "originator.h"
+
+static void hna_local_purge(struct work_struct *work);
+static void _hna_global_del_orig(struct bat_priv *bat_priv,
+ struct hna_global_entry *hna_global_entry,
+ char *message);
+
+static void hna_local_start_timer(struct bat_priv *bat_priv)
+{
+ INIT_DELAYED_WORK(&bat_priv->hna_work, hna_local_purge);
+ queue_delayed_work(bat_event_workqueue, &bat_priv->hna_work, 10 * HZ);
+}
+
+int hna_local_init(struct bat_priv *bat_priv)
+{
+ if (bat_priv->hna_local_hash)
+ return 1;
+
+ bat_priv->hna_local_hash = hash_new(1024);
+
+ if (!bat_priv->hna_local_hash)
+ return 0;
+
+ atomic_set(&bat_priv->hna_local_changed, 0);
+ hna_local_start_timer(bat_priv);
+
+ return 1;
+}
+
+void hna_local_add(struct net_device *soft_iface, uint8_t *addr)
+{
+ struct bat_priv *bat_priv = netdev_priv(soft_iface);
+ struct hna_local_entry *hna_local_entry;
+ struct hna_global_entry *hna_global_entry;
+ int required_bytes;
+
+ spin_lock_bh(&bat_priv->hna_lhash_lock);
+ hna_local_entry =
+ ((struct hna_local_entry *)hash_find(bat_priv->hna_local_hash,
+ compare_orig, choose_orig,
+ addr));
+ spin_unlock_bh(&bat_priv->hna_lhash_lock);
+
+ if (hna_local_entry) {
+ hna_local_entry->last_seen = jiffies;
+ return;
+ }
+
+ /* only announce as many hosts as possible in the batman-packet and
+ space in batman_packet->num_hna That also should give a limit to
+ MAC-flooding. */
+ required_bytes = (bat_priv->num_local_hna + 1) * ETH_ALEN;
+ required_bytes += BAT_PACKET_LEN;
+
+ if ((required_bytes > ETH_DATA_LEN) ||
+ (atomic_read(&bat_priv->aggregated_ogms) &&
+ required_bytes > MAX_AGGREGATION_BYTES) ||
+ (bat_priv->num_local_hna + 1 > 255)) {
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Can't add new local hna entry (%pM): "
+ "number of local hna entries exceeds packet size\n",
+ addr);
+ return;
+ }
+
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Creating new local hna entry: %pM\n", addr);
+
+ hna_local_entry = kmalloc(sizeof(struct hna_local_entry), GFP_ATOMIC);
+ if (!hna_local_entry)
+ return;
+
+ memcpy(hna_local_entry->addr, addr, ETH_ALEN);
+ hna_local_entry->last_seen = jiffies;
+
+ /* the batman interface mac address should never be purged */
+ if (compare_orig(addr, soft_iface->dev_addr))
+ hna_local_entry->never_purge = 1;
+ else
+ hna_local_entry->never_purge = 0;
+
+ spin_lock_bh(&bat_priv->hna_lhash_lock);
+
+ hash_add(bat_priv->hna_local_hash, compare_orig, choose_orig,
+ hna_local_entry);
+ bat_priv->num_local_hna++;
+ atomic_set(&bat_priv->hna_local_changed, 1);
+
+ spin_unlock_bh(&bat_priv->hna_lhash_lock);
+
+ /* remove address from global hash if present */
+ spin_lock_bh(&bat_priv->hna_ghash_lock);
+
+ hna_global_entry = ((struct hna_global_entry *)
+ hash_find(bat_priv->hna_global_hash,
+ compare_orig, choose_orig, addr));
+
+ if (hna_global_entry)
+ _hna_global_del_orig(bat_priv, hna_global_entry,
+ "local hna received");
+
+ spin_unlock_bh(&bat_priv->hna_ghash_lock);
+}
+
+int hna_local_fill_buffer(struct bat_priv *bat_priv,
+ unsigned char *buff, int buff_len)
+{
+ struct hashtable_t *hash = bat_priv->hna_local_hash;
+ struct hna_local_entry *hna_local_entry;
+ struct element_t *bucket;
+ int i;
+ struct hlist_node *walk;
+ struct hlist_head *head;
+ int count = 0;
+
+ spin_lock_bh(&bat_priv->hna_lhash_lock);
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry(bucket, walk, head, hlist) {
+
+ if (buff_len < (count + 1) * ETH_ALEN)
+ break;
+
+ hna_local_entry = bucket->data;
+ memcpy(buff + (count * ETH_ALEN), hna_local_entry->addr,
+ ETH_ALEN);
+
+ count++;
+ }
+ }
+
+ /* if we did not get all new local hnas see you next time ;-) */
+ if (count == bat_priv->num_local_hna)
+ atomic_set(&bat_priv->hna_local_changed, 0);
+
+ spin_unlock_bh(&bat_priv->hna_lhash_lock);
+ return i;
+}
+
+int hna_local_seq_print_text(struct seq_file *seq, void *offset)
+{
+ struct net_device *net_dev = (struct net_device *)seq->private;
+ struct bat_priv *bat_priv = netdev_priv(net_dev);
+ struct hashtable_t *hash = bat_priv->hna_local_hash;
+ struct hna_local_entry *hna_local_entry;
+ int i;
+ struct hlist_node *walk;
+ struct hlist_head *head;
+ struct element_t *bucket;
+ size_t buf_size, pos;
+ char *buff;
+
+ if (!bat_priv->primary_if) {
+ return seq_printf(seq, "BATMAN mesh %s disabled - "
+ "please specify interfaces to enable it\n",
+ net_dev->name);
+ }
+
+ seq_printf(seq, "Locally retrieved addresses (from %s) "
+ "announced via HNA:\n",
+ net_dev->name);
+
+ spin_lock_bh(&bat_priv->hna_lhash_lock);
+
+ buf_size = 1;
+ /* Estimate length for: " * xx:xx:xx:xx:xx:xx\n" */
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each(walk, head)
+ buf_size += 21;
+ }
+
+ buff = kmalloc(buf_size, GFP_ATOMIC);
+ if (!buff) {
+ spin_unlock_bh(&bat_priv->hna_lhash_lock);
+ return -ENOMEM;
+ }
+ buff[0] = '\0';
+ pos = 0;
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry(bucket, walk, head, hlist) {
+ hna_local_entry = bucket->data;
+
+ pos += snprintf(buff + pos, 22, " * %pM\n",
+ hna_local_entry->addr);
+ }
+ }
+
+ spin_unlock_bh(&bat_priv->hna_lhash_lock);
+
+ seq_printf(seq, "%s", buff);
+ kfree(buff);
+ return 0;
+}
+
+static void _hna_local_del(void *data, void *arg)
+{
+ struct bat_priv *bat_priv = (struct bat_priv *)arg;
+
+ kfree(data);
+ bat_priv->num_local_hna--;
+ atomic_set(&bat_priv->hna_local_changed, 1);
+}
+
+static void hna_local_del(struct bat_priv *bat_priv,
+ struct hna_local_entry *hna_local_entry,
+ char *message)
+{
+ bat_dbg(DBG_ROUTES, bat_priv, "Deleting local hna entry (%pM): %s\n",
+ hna_local_entry->addr, message);
+
+ hash_remove(bat_priv->hna_local_hash, compare_orig, choose_orig,
+ hna_local_entry->addr);
+ _hna_local_del(hna_local_entry, bat_priv);
+}
+
+void hna_local_remove(struct bat_priv *bat_priv,
+ uint8_t *addr, char *message)
+{
+ struct hna_local_entry *hna_local_entry;
+
+ spin_lock_bh(&bat_priv->hna_lhash_lock);
+
+ hna_local_entry = (struct hna_local_entry *)
+ hash_find(bat_priv->hna_local_hash, compare_orig, choose_orig,
+ addr);
+
+ if (hna_local_entry)
+ hna_local_del(bat_priv, hna_local_entry, message);
+
+ spin_unlock_bh(&bat_priv->hna_lhash_lock);
+}
+
+static void hna_local_purge(struct work_struct *work)
+{
+ struct delayed_work *delayed_work =
+ container_of(work, struct delayed_work, work);
+ struct bat_priv *bat_priv =
+ container_of(delayed_work, struct bat_priv, hna_work);
+ struct hashtable_t *hash = bat_priv->hna_local_hash;
+ struct hna_local_entry *hna_local_entry;
+ int i;
+ struct hlist_node *walk, *safe;
+ struct hlist_head *head;
+ struct element_t *bucket;
+ unsigned long timeout;
+
+ spin_lock_bh(&bat_priv->hna_lhash_lock);
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry_safe(bucket, walk, safe, head, hlist) {
+ hna_local_entry = bucket->data;
+
+ timeout = hna_local_entry->last_seen;
+ timeout += LOCAL_HNA_TIMEOUT * HZ;
+
+ if ((!hna_local_entry->never_purge) &&
+ time_after(jiffies, timeout))
+ hna_local_del(bat_priv, hna_local_entry,
+ "address timed out");
+ }
+ }
+
+ spin_unlock_bh(&bat_priv->hna_lhash_lock);
+ hna_local_start_timer(bat_priv);
+}
+
+void hna_local_free(struct bat_priv *bat_priv)
+{
+ if (!bat_priv->hna_local_hash)
+ return;
+
+ cancel_delayed_work_sync(&bat_priv->hna_work);
+ hash_delete(bat_priv->hna_local_hash, _hna_local_del, bat_priv);
+ bat_priv->hna_local_hash = NULL;
+}
+
+int hna_global_init(struct bat_priv *bat_priv)
+{
+ if (bat_priv->hna_global_hash)
+ return 1;
+
+ bat_priv->hna_global_hash = hash_new(1024);
+
+ if (!bat_priv->hna_global_hash)
+ return 0;
+
+ return 1;
+}
+
+void hna_global_add_orig(struct bat_priv *bat_priv,
+ struct orig_node *orig_node,
+ unsigned char *hna_buff, int hna_buff_len)
+{
+ struct hna_global_entry *hna_global_entry;
+ struct hna_local_entry *hna_local_entry;
+ int hna_buff_count = 0;
+ unsigned char *hna_ptr;
+
+ while ((hna_buff_count + 1) * ETH_ALEN <= hna_buff_len) {
+ spin_lock_bh(&bat_priv->hna_ghash_lock);
+
+ hna_ptr = hna_buff + (hna_buff_count * ETH_ALEN);
+ hna_global_entry = (struct hna_global_entry *)
+ hash_find(bat_priv->hna_global_hash, compare_orig,
+ choose_orig, hna_ptr);
+
+ if (!hna_global_entry) {
+ spin_unlock_bh(&bat_priv->hna_ghash_lock);
+
+ hna_global_entry =
+ kmalloc(sizeof(struct hna_global_entry),
+ GFP_ATOMIC);
+
+ if (!hna_global_entry)
+ break;
+
+ memcpy(hna_global_entry->addr, hna_ptr, ETH_ALEN);
+
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Creating new global hna entry: "
+ "%pM (via %pM)\n",
+ hna_global_entry->addr, orig_node->orig);
+
+ spin_lock_bh(&bat_priv->hna_ghash_lock);
+ hash_add(bat_priv->hna_global_hash, compare_orig,
+ choose_orig, hna_global_entry);
+
+ }
+
+ hna_global_entry->orig_node = orig_node;
+ spin_unlock_bh(&bat_priv->hna_ghash_lock);
+
+ /* remove address from local hash if present */
+ spin_lock_bh(&bat_priv->hna_lhash_lock);
+
+ hna_ptr = hna_buff + (hna_buff_count * ETH_ALEN);
+ hna_local_entry = (struct hna_local_entry *)
+ hash_find(bat_priv->hna_local_hash, compare_orig,
+ choose_orig, hna_ptr);
+
+ if (hna_local_entry)
+ hna_local_del(bat_priv, hna_local_entry,
+ "global hna received");
+
+ spin_unlock_bh(&bat_priv->hna_lhash_lock);
+
+ hna_buff_count++;
+ }
+
+ /* initialize, and overwrite if malloc succeeds */
+ orig_node->hna_buff = NULL;
+ orig_node->hna_buff_len = 0;
+
+ if (hna_buff_len > 0) {
+ orig_node->hna_buff = kmalloc(hna_buff_len, GFP_ATOMIC);
+ if (orig_node->hna_buff) {
+ memcpy(orig_node->hna_buff, hna_buff, hna_buff_len);
+ orig_node->hna_buff_len = hna_buff_len;
+ }
+ }
+}
+
+int hna_global_seq_print_text(struct seq_file *seq, void *offset)
+{
+ struct net_device *net_dev = (struct net_device *)seq->private;
+ struct bat_priv *bat_priv = netdev_priv(net_dev);
+ struct hashtable_t *hash = bat_priv->hna_global_hash;
+ struct hna_global_entry *hna_global_entry;
+ int i;
+ struct hlist_node *walk;
+ struct hlist_head *head;
+ struct element_t *bucket;
+ size_t buf_size, pos;
+ char *buff;
+
+ if (!bat_priv->primary_if) {
+ return seq_printf(seq, "BATMAN mesh %s disabled - "
+ "please specify interfaces to enable it\n",
+ net_dev->name);
+ }
+
+ seq_printf(seq, "Globally announced HNAs received via the mesh %s\n",
+ net_dev->name);
+
+ spin_lock_bh(&bat_priv->hna_ghash_lock);
+
+ buf_size = 1;
+ /* Estimate length for: " * xx:xx:xx:xx:xx:xx via xx:xx:xx:xx:xx:xx\n"*/
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each(walk, head)
+ buf_size += 43;
+ }
+
+ buff = kmalloc(buf_size, GFP_ATOMIC);
+ if (!buff) {
+ spin_unlock_bh(&bat_priv->hna_ghash_lock);
+ return -ENOMEM;
+ }
+ buff[0] = '\0';
+ pos = 0;
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry(bucket, walk, head, hlist) {
+ hna_global_entry = bucket->data;
+
+ pos += snprintf(buff + pos, 44,
+ " * %pM via %pM\n",
+ hna_global_entry->addr,
+ hna_global_entry->orig_node->orig);
+ }
+ }
+
+ spin_unlock_bh(&bat_priv->hna_ghash_lock);
+
+ seq_printf(seq, "%s", buff);
+ kfree(buff);
+ return 0;
+}
+
+static void _hna_global_del_orig(struct bat_priv *bat_priv,
+ struct hna_global_entry *hna_global_entry,
+ char *message)
+{
+ bat_dbg(DBG_ROUTES, bat_priv,
+ "Deleting global hna entry %pM (via %pM): %s\n",
+ hna_global_entry->addr, hna_global_entry->orig_node->orig,
+ message);
+
+ hash_remove(bat_priv->hna_global_hash, compare_orig, choose_orig,
+ hna_global_entry->addr);
+ kfree(hna_global_entry);
+}
+
+void hna_global_del_orig(struct bat_priv *bat_priv,
+ struct orig_node *orig_node, char *message)
+{
+ struct hna_global_entry *hna_global_entry;
+ int hna_buff_count = 0;
+ unsigned char *hna_ptr;
+
+ if (orig_node->hna_buff_len == 0)
+ return;
+
+ spin_lock_bh(&bat_priv->hna_ghash_lock);
+
+ while ((hna_buff_count + 1) * ETH_ALEN <= orig_node->hna_buff_len) {
+ hna_ptr = orig_node->hna_buff + (hna_buff_count * ETH_ALEN);
+ hna_global_entry = (struct hna_global_entry *)
+ hash_find(bat_priv->hna_global_hash, compare_orig,
+ choose_orig, hna_ptr);
+
+ if ((hna_global_entry) &&
+ (hna_global_entry->orig_node == orig_node))
+ _hna_global_del_orig(bat_priv, hna_global_entry,
+ message);
+
+ hna_buff_count++;
+ }
+
+ spin_unlock_bh(&bat_priv->hna_ghash_lock);
+
+ orig_node->hna_buff_len = 0;
+ kfree(orig_node->hna_buff);
+ orig_node->hna_buff = NULL;
+}
+
+static void hna_global_del(void *data, void *arg)
+{
+ kfree(data);
+}
+
+void hna_global_free(struct bat_priv *bat_priv)
+{
+ if (!bat_priv->hna_global_hash)
+ return;
+
+ hash_delete(bat_priv->hna_global_hash, hna_global_del, NULL);
+ bat_priv->hna_global_hash = NULL;
+}
+
+struct orig_node *transtable_search(struct bat_priv *bat_priv, uint8_t *addr)
+{
+ struct hna_global_entry *hna_global_entry;
+
+ spin_lock_bh(&bat_priv->hna_ghash_lock);
+ hna_global_entry = (struct hna_global_entry *)
+ hash_find(bat_priv->hna_global_hash,
+ compare_orig, choose_orig, addr);
+ spin_unlock_bh(&bat_priv->hna_ghash_lock);
+
+ if (!hna_global_entry)
+ return NULL;
+
+ return hna_global_entry->orig_node;
+}
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_TRANSLATION_TABLE_H_
+#define _NET_BATMAN_ADV_TRANSLATION_TABLE_H_
+
+#include "types.h"
+
+int hna_local_init(struct bat_priv *bat_priv);
+void hna_local_add(struct net_device *soft_iface, uint8_t *addr);
+void hna_local_remove(struct bat_priv *bat_priv,
+ uint8_t *addr, char *message);
+int hna_local_fill_buffer(struct bat_priv *bat_priv,
+ unsigned char *buff, int buff_len);
+int hna_local_seq_print_text(struct seq_file *seq, void *offset);
+void hna_local_free(struct bat_priv *bat_priv);
+int hna_global_init(struct bat_priv *bat_priv);
+void hna_global_add_orig(struct bat_priv *bat_priv,
+ struct orig_node *orig_node,
+ unsigned char *hna_buff, int hna_buff_len);
+int hna_global_seq_print_text(struct seq_file *seq, void *offset);
+void hna_global_del_orig(struct bat_priv *bat_priv,
+ struct orig_node *orig_node, char *message);
+void hna_global_free(struct bat_priv *bat_priv);
+struct orig_node *transtable_search(struct bat_priv *bat_priv, uint8_t *addr);
+
+#endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
+ *
+ * Marek Lindner, Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+
+
+#ifndef _NET_BATMAN_ADV_TYPES_H_
+#define _NET_BATMAN_ADV_TYPES_H_
+
+#include "packet.h"
+#include "bitarray.h"
+
+#define BAT_HEADER_LEN (sizeof(struct ethhdr) + \
+ ((sizeof(struct unicast_packet) > sizeof(struct bcast_packet) ? \
+ sizeof(struct unicast_packet) : \
+ sizeof(struct bcast_packet))))
+
+
+struct batman_if {
+ struct list_head list;
+ int16_t if_num;
+ char if_status;
+ struct net_device *net_dev;
+ atomic_t seqno;
+ atomic_t frag_seqno;
+ unsigned char *packet_buff;
+ int packet_len;
+ struct kobject *hardif_obj;
+ struct kref refcount;
+ struct packet_type batman_adv_ptype;
+ struct net_device *soft_iface;
+ struct rcu_head rcu;
+};
+
+/**
+ * orig_node - structure for orig_list maintaining nodes of mesh
+ * @primary_addr: hosts primary interface address
+ * @last_valid: when last packet from this node was received
+ * @bcast_seqno_reset: time when the broadcast seqno window was reset
+ * @batman_seqno_reset: time when the batman seqno window was reset
+ * @gw_flags: flags related to gateway class
+ * @flags: for now only VIS_SERVER flag
+ * @last_real_seqno: last and best known squence number
+ * @last_ttl: ttl of last received packet
+ * @last_bcast_seqno: last broadcast sequence number received by this host
+ *
+ * @candidates: how many candidates are available
+ * @selected: next bonding candidate
+ */
+struct orig_node {
+ uint8_t orig[ETH_ALEN];
+ uint8_t primary_addr[ETH_ALEN];
+ struct neigh_node *router;
+ unsigned long *bcast_own;
+ uint8_t *bcast_own_sum;
+ uint8_t tq_own;
+ int tq_asym_penalty;
+ unsigned long last_valid;
+ unsigned long bcast_seqno_reset;
+ unsigned long batman_seqno_reset;
+ uint8_t gw_flags;
+ uint8_t flags;
+ unsigned char *hna_buff;
+ int16_t hna_buff_len;
+ uint32_t last_real_seqno;
+ uint8_t last_ttl;
+ unsigned long bcast_bits[NUM_WORDS];
+ uint32_t last_bcast_seqno;
+ struct list_head neigh_list;
+ struct list_head frag_list;
+ unsigned long last_frag_packet;
+ struct {
+ uint8_t candidates;
+ struct neigh_node *selected;
+ } bond;
+};
+
+struct gw_node {
+ struct hlist_node list;
+ struct orig_node *orig_node;
+ unsigned long deleted;
+ struct kref refcount;
+ struct rcu_head rcu;
+};
+
+/**
+ * neigh_node
+ * @last_valid: when last packet via this neighbor was received
+ */
+struct neigh_node {
+ struct list_head list;
+ uint8_t addr[ETH_ALEN];
+ uint8_t real_packet_count;
+ uint8_t tq_recv[TQ_GLOBAL_WINDOW_SIZE];
+ uint8_t tq_index;
+ uint8_t tq_avg;
+ uint8_t last_ttl;
+ struct neigh_node *next_bond_candidate;
+ unsigned long last_valid;
+ unsigned long real_bits[NUM_WORDS];
+ struct orig_node *orig_node;
+ struct batman_if *if_incoming;
+};
+
+
+struct bat_priv {
+ atomic_t mesh_state;
+ struct net_device_stats stats;
+ atomic_t aggregated_ogms; /* boolean */
+ atomic_t bonding; /* boolean */
+ atomic_t fragmentation; /* boolean */
+ atomic_t vis_mode; /* VIS_TYPE_* */
+ atomic_t gw_mode; /* GW_MODE_* */
+ atomic_t gw_sel_class; /* uint */
+ atomic_t gw_bandwidth; /* gw bandwidth */
+ atomic_t orig_interval; /* uint */
+ atomic_t hop_penalty; /* uint */
+ atomic_t log_level; /* uint */
+ atomic_t bcast_seqno;
+ atomic_t bcast_queue_left;
+ atomic_t batman_queue_left;
+ char num_ifaces;
+ struct hlist_head softif_neigh_list;
+ struct softif_neigh *softif_neigh;
+ struct debug_log *debug_log;
+ struct batman_if *primary_if;
+ struct kobject *mesh_obj;
+ struct dentry *debug_dir;
+ struct hlist_head forw_bat_list;
+ struct hlist_head forw_bcast_list;
+ struct hlist_head gw_list;
+ struct list_head vis_send_list;
+ struct hashtable_t *orig_hash;
+ struct hashtable_t *hna_local_hash;
+ struct hashtable_t *hna_global_hash;
+ struct hashtable_t *vis_hash;
+ spinlock_t orig_hash_lock; /* protects orig_hash */
+ spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
+ spinlock_t forw_bcast_list_lock; /* protects */
+ spinlock_t hna_lhash_lock; /* protects hna_local_hash */
+ spinlock_t hna_ghash_lock; /* protects hna_global_hash */
+ spinlock_t gw_list_lock; /* protects gw_list */
+ spinlock_t vis_hash_lock; /* protects vis_hash */
+ spinlock_t vis_list_lock; /* protects vis_info::recv_list */
+ spinlock_t softif_neigh_lock; /* protects soft-interface neigh list */
+ int16_t num_local_hna;
+ atomic_t hna_local_changed;
+ struct delayed_work hna_work;
+ struct delayed_work orig_work;
+ struct delayed_work vis_work;
+ struct gw_node *curr_gw;
+ struct vis_info *my_vis_info;
+};
+
+struct socket_client {
+ struct list_head queue_list;
+ unsigned int queue_len;
+ unsigned char index;
+ spinlock_t lock; /* protects queue_list, queue_len, index */
+ wait_queue_head_t queue_wait;
+ struct bat_priv *bat_priv;
+};
+
+struct socket_packet {
+ struct list_head list;
+ size_t icmp_len;
+ struct icmp_packet_rr icmp_packet;
+};
+
+struct hna_local_entry {
+ uint8_t addr[ETH_ALEN];
+ unsigned long last_seen;
+ char never_purge;
+};
+
+struct hna_global_entry {
+ uint8_t addr[ETH_ALEN];
+ struct orig_node *orig_node;
+};
+
+/**
+ * forw_packet - structure for forw_list maintaining packets to be
+ * send/forwarded
+ */
+struct forw_packet {
+ struct hlist_node list;
+ unsigned long send_time;
+ uint8_t own;
+ struct sk_buff *skb;
+ uint16_t packet_len;
+ uint32_t direct_link_flags;
+ uint8_t num_packets;
+ struct delayed_work delayed_work;
+ struct batman_if *if_incoming;
+};
+
+/* While scanning for vis-entries of a particular vis-originator
+ * this list collects its interfaces to create a subgraph/cluster
+ * out of them later
+ */
+struct if_list_entry {
+ uint8_t addr[ETH_ALEN];
+ bool primary;
+ struct hlist_node list;
+};
+
+struct debug_log {
+ char log_buff[LOG_BUF_LEN];
+ unsigned long log_start;
+ unsigned long log_end;
+ spinlock_t lock; /* protects log_buff, log_start and log_end */
+ wait_queue_head_t queue_wait;
+};
+
+struct frag_packet_list_entry {
+ struct list_head list;
+ uint16_t seqno;
+ struct sk_buff *skb;
+};
+
+struct vis_info {
+ unsigned long first_seen;
+ struct list_head recv_list;
+ /* list of server-neighbors we received a vis-packet
+ * from. we should not reply to them. */
+ struct list_head send_list;
+ struct kref refcount;
+ struct bat_priv *bat_priv;
+ /* this packet might be part of the vis send queue. */
+ struct sk_buff *skb_packet;
+ /* vis_info may follow here*/
+} __attribute__((packed));
+
+struct vis_info_entry {
+ uint8_t src[ETH_ALEN];
+ uint8_t dest[ETH_ALEN];
+ uint8_t quality; /* quality = 0 means HNA */
+} __attribute__((packed));
+
+struct recvlist_node {
+ struct list_head list;
+ uint8_t mac[ETH_ALEN];
+};
+
+struct softif_neigh {
+ struct hlist_node list;
+ uint8_t addr[ETH_ALEN];
+ unsigned long last_seen;
+ short vid;
+ struct kref refcount;
+ struct rcu_head rcu;
+};
+
+#endif /* _NET_BATMAN_ADV_TYPES_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2010 B.A.T.M.A.N. contributors:
+ *
+ * Andreas Langer
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "unicast.h"
+#include "send.h"
+#include "soft-interface.h"
+#include "gateway_client.h"
+#include "originator.h"
+#include "hash.h"
+#include "translation-table.h"
+#include "routing.h"
+#include "hard-interface.h"
+
+
+static struct sk_buff *frag_merge_packet(struct list_head *head,
+ struct frag_packet_list_entry *tfp,
+ struct sk_buff *skb)
+{
+ struct unicast_frag_packet *up =
+ (struct unicast_frag_packet *)skb->data;
+ struct sk_buff *tmp_skb;
+ struct unicast_packet *unicast_packet;
+ int hdr_len = sizeof(struct unicast_packet),
+ uni_diff = sizeof(struct unicast_frag_packet) - hdr_len;
+
+ /* set skb to the first part and tmp_skb to the second part */
+ if (up->flags & UNI_FRAG_HEAD) {
+ tmp_skb = tfp->skb;
+ } else {
+ tmp_skb = skb;
+ skb = tfp->skb;
+ }
+
+ skb_pull(tmp_skb, sizeof(struct unicast_frag_packet));
+ if (pskb_expand_head(skb, 0, tmp_skb->len, GFP_ATOMIC) < 0) {
+ /* free buffered skb, skb will be freed later */
+ kfree_skb(tfp->skb);
+ return NULL;
+ }
+
+ /* move free entry to end */
+ tfp->skb = NULL;
+ tfp->seqno = 0;
+ list_move_tail(&tfp->list, head);
+
+ memcpy(skb_put(skb, tmp_skb->len), tmp_skb->data, tmp_skb->len);
+ kfree_skb(tmp_skb);
+
+ memmove(skb->data + uni_diff, skb->data, hdr_len);
+ unicast_packet = (struct unicast_packet *) skb_pull(skb, uni_diff);
+ unicast_packet->packet_type = BAT_UNICAST;
+
+ return skb;
+}
+
+static void frag_create_entry(struct list_head *head, struct sk_buff *skb)
+{
+ struct frag_packet_list_entry *tfp;
+ struct unicast_frag_packet *up =
+ (struct unicast_frag_packet *)skb->data;
+
+ /* free and oldest packets stand at the end */
+ tfp = list_entry((head)->prev, typeof(*tfp), list);
+ kfree_skb(tfp->skb);
+
+ tfp->seqno = ntohs(up->seqno);
+ tfp->skb = skb;
+ list_move(&tfp->list, head);
+ return;
+}
+
+static int frag_create_buffer(struct list_head *head)
+{
+ int i;
+ struct frag_packet_list_entry *tfp;
+
+ for (i = 0; i < FRAG_BUFFER_SIZE; i++) {
+ tfp = kmalloc(sizeof(struct frag_packet_list_entry),
+ GFP_ATOMIC);
+ if (!tfp) {
+ frag_list_free(head);
+ return -ENOMEM;
+ }
+ tfp->skb = NULL;
+ tfp->seqno = 0;
+ INIT_LIST_HEAD(&tfp->list);
+ list_add(&tfp->list, head);
+ }
+
+ return 0;
+}
+
+static struct frag_packet_list_entry *frag_search_packet(struct list_head *head,
+ struct unicast_frag_packet *up)
+{
+ struct frag_packet_list_entry *tfp;
+ struct unicast_frag_packet *tmp_up = NULL;
+ uint16_t search_seqno;
+
+ if (up->flags & UNI_FRAG_HEAD)
+ search_seqno = ntohs(up->seqno)+1;
+ else
+ search_seqno = ntohs(up->seqno)-1;
+
+ list_for_each_entry(tfp, head, list) {
+
+ if (!tfp->skb)
+ continue;
+
+ if (tfp->seqno == ntohs(up->seqno))
+ goto mov_tail;
+
+ tmp_up = (struct unicast_frag_packet *)tfp->skb->data;
+
+ if (tfp->seqno == search_seqno) {
+
+ if ((tmp_up->flags & UNI_FRAG_HEAD) !=
+ (up->flags & UNI_FRAG_HEAD))
+ return tfp;
+ else
+ goto mov_tail;
+ }
+ }
+ return NULL;
+
+mov_tail:
+ list_move_tail(&tfp->list, head);
+ return NULL;
+}
+
+void frag_list_free(struct list_head *head)
+{
+ struct frag_packet_list_entry *pf, *tmp_pf;
+
+ if (!list_empty(head)) {
+
+ list_for_each_entry_safe(pf, tmp_pf, head, list) {
+ kfree_skb(pf->skb);
+ list_del(&pf->list);
+ kfree(pf);
+ }
+ }
+ return;
+}
+
+/* frag_reassemble_skb():
+ * returns NET_RX_DROP if the operation failed - skb is left intact
+ * returns NET_RX_SUCCESS if the fragment was buffered (skb_new will be NULL)
+ * or the skb could be reassembled (skb_new will point to the new packet and
+ * skb was freed)
+ */
+int frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
+ struct sk_buff **new_skb)
+{
+ struct orig_node *orig_node;
+ struct frag_packet_list_entry *tmp_frag_entry;
+ int ret = NET_RX_DROP;
+ struct unicast_frag_packet *unicast_packet =
+ (struct unicast_frag_packet *)skb->data;
+
+ *new_skb = NULL;
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+ orig_node = ((struct orig_node *)
+ hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
+ unicast_packet->orig));
+
+ if (!orig_node) {
+ pr_debug("couldn't find originator in orig_hash\n");
+ goto out;
+ }
+
+ orig_node->last_frag_packet = jiffies;
+
+ if (list_empty(&orig_node->frag_list) &&
+ frag_create_buffer(&orig_node->frag_list)) {
+ pr_debug("couldn't create frag buffer\n");
+ goto out;
+ }
+
+ tmp_frag_entry = frag_search_packet(&orig_node->frag_list,
+ unicast_packet);
+
+ if (!tmp_frag_entry) {
+ frag_create_entry(&orig_node->frag_list, skb);
+ ret = NET_RX_SUCCESS;
+ goto out;
+ }
+
+ *new_skb = frag_merge_packet(&orig_node->frag_list, tmp_frag_entry,
+ skb);
+ /* if not, merge failed */
+ if (*new_skb)
+ ret = NET_RX_SUCCESS;
+out:
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ return ret;
+}
+
+int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
+ struct batman_if *batman_if, uint8_t dstaddr[])
+{
+ struct unicast_packet tmp_uc, *unicast_packet;
+ struct sk_buff *frag_skb;
+ struct unicast_frag_packet *frag1, *frag2;
+ int uc_hdr_len = sizeof(struct unicast_packet);
+ int ucf_hdr_len = sizeof(struct unicast_frag_packet);
+ int data_len = skb->len;
+
+ if (!bat_priv->primary_if)
+ goto dropped;
+
+ unicast_packet = (struct unicast_packet *) skb->data;
+
+ memcpy(&tmp_uc, unicast_packet, uc_hdr_len);
+ frag_skb = dev_alloc_skb(data_len - (data_len / 2) + ucf_hdr_len);
+ skb_split(skb, frag_skb, data_len / 2);
+
+ if (my_skb_head_push(skb, ucf_hdr_len - uc_hdr_len) < 0 ||
+ my_skb_head_push(frag_skb, ucf_hdr_len) < 0)
+ goto drop_frag;
+
+ frag1 = (struct unicast_frag_packet *)skb->data;
+ frag2 = (struct unicast_frag_packet *)frag_skb->data;
+
+ memcpy(frag1, &tmp_uc, sizeof(struct unicast_packet));
+
+ frag1->ttl--;
+ frag1->version = COMPAT_VERSION;
+ frag1->packet_type = BAT_UNICAST_FRAG;
+
+ memcpy(frag1->orig, bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+ memcpy(frag2, frag1, sizeof(struct unicast_frag_packet));
+
+ frag1->flags |= UNI_FRAG_HEAD;
+ frag2->flags &= ~UNI_FRAG_HEAD;
+
+ frag1->seqno = htons((uint16_t)atomic_inc_return(
+ &batman_if->frag_seqno));
+ frag2->seqno = htons((uint16_t)atomic_inc_return(
+ &batman_if->frag_seqno));
+
+ send_skb_packet(skb, batman_if, dstaddr);
+ send_skb_packet(frag_skb, batman_if, dstaddr);
+ return NET_RX_SUCCESS;
+
+drop_frag:
+ kfree_skb(frag_skb);
+dropped:
+ kfree_skb(skb);
+ return NET_RX_DROP;
+}
+
+int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
+{
+ struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
+ struct unicast_packet *unicast_packet;
+ struct orig_node *orig_node;
+ struct batman_if *batman_if;
+ struct neigh_node *router;
+ int data_len = skb->len;
+ uint8_t dstaddr[6];
+
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+
+ /* get routing information */
+ if (is_multicast_ether_addr(ethhdr->h_dest))
+ orig_node = (struct orig_node *)gw_get_selected(bat_priv);
+ else
+ orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
+ compare_orig,
+ choose_orig,
+ ethhdr->h_dest));
+
+ /* check for hna host */
+ if (!orig_node)
+ orig_node = transtable_search(bat_priv, ethhdr->h_dest);
+
+ router = find_router(bat_priv, orig_node, NULL);
+
+ if (!router)
+ goto unlock;
+
+ /* don't lock while sending the packets ... we therefore
+ * copy the required data before sending */
+
+ batman_if = router->if_incoming;
+ memcpy(dstaddr, router->addr, ETH_ALEN);
+
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ if (batman_if->if_status != IF_ACTIVE)
+ goto dropped;
+
+ if (my_skb_head_push(skb, sizeof(struct unicast_packet)) < 0)
+ goto dropped;
+
+ unicast_packet = (struct unicast_packet *)skb->data;
+
+ unicast_packet->version = COMPAT_VERSION;
+ /* batman packet type: unicast */
+ unicast_packet->packet_type = BAT_UNICAST;
+ /* set unicast ttl */
+ unicast_packet->ttl = TTL;
+ /* copy the destination for faster routing */
+ memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
+
+ if (atomic_read(&bat_priv->fragmentation) &&
+ data_len + sizeof(struct unicast_packet) >
+ batman_if->net_dev->mtu) {
+ /* send frag skb decreases ttl */
+ unicast_packet->ttl++;
+ return frag_send_skb(skb, bat_priv, batman_if,
+ dstaddr);
+ }
+ send_skb_packet(skb, batman_if, dstaddr);
+ return 0;
+
+unlock:
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+dropped:
+ kfree_skb(skb);
+ return 1;
+}
--- /dev/null
+/*
+ * Copyright (C) 2010 B.A.T.M.A.N. contributors:
+ *
+ * Andreas Langer
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_UNICAST_H_
+#define _NET_BATMAN_ADV_UNICAST_H_
+
+#define FRAG_TIMEOUT 10000 /* purge frag list entrys after time in ms */
+#define FRAG_BUFFER_SIZE 6 /* number of list elements in buffer */
+
+int frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
+ struct sk_buff **new_skb);
+void frag_list_free(struct list_head *head);
+int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv);
+int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
+ struct batman_if *batman_if, uint8_t dstaddr[]);
+
+#endif /* _NET_BATMAN_ADV_UNICAST_H_ */
--- /dev/null
+/*
+ * Copyright (C) 2008-2010 B.A.T.M.A.N. contributors:
+ *
+ * Simon Wunderlich
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#include "main.h"
+#include "send.h"
+#include "translation-table.h"
+#include "vis.h"
+#include "soft-interface.h"
+#include "hard-interface.h"
+#include "hash.h"
+#include "originator.h"
+
+#define MAX_VIS_PACKET_SIZE 1000
+
+/* Returns the smallest signed integer in two's complement with the sizeof x */
+#define smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u)))
+
+/* Checks if a sequence number x is a predecessor/successor of y.
+ * they handle overflows/underflows and can correctly check for a
+ * predecessor/successor unless the variable sequence number has grown by
+ * more then 2**(bitwidth(x)-1)-1.
+ * This means that for a uint8_t with the maximum value 255, it would think:
+ * - when adding nothing - it is neither a predecessor nor a successor
+ * - before adding more than 127 to the starting value - it is a predecessor,
+ * - when adding 128 - it is neither a predecessor nor a successor,
+ * - after adding more than 127 to the starting value - it is a successor */
+#define seq_before(x, y) ({typeof(x) _dummy = (x - y); \
+ _dummy > smallest_signed_int(_dummy); })
+#define seq_after(x, y) seq_before(y, x)
+
+static void start_vis_timer(struct bat_priv *bat_priv);
+
+/* free the info */
+static void free_info(struct kref *ref)
+{
+ struct vis_info *info = container_of(ref, struct vis_info, refcount);
+ struct bat_priv *bat_priv = info->bat_priv;
+ struct recvlist_node *entry, *tmp;
+
+ list_del_init(&info->send_list);
+ spin_lock_bh(&bat_priv->vis_list_lock);
+ list_for_each_entry_safe(entry, tmp, &info->recv_list, list) {
+ list_del(&entry->list);
+ kfree(entry);
+ }
+
+ spin_unlock_bh(&bat_priv->vis_list_lock);
+ kfree_skb(info->skb_packet);
+}
+
+/* Compare two vis packets, used by the hashing algorithm */
+static int vis_info_cmp(void *data1, void *data2)
+{
+ struct vis_info *d1, *d2;
+ struct vis_packet *p1, *p2;
+ d1 = data1;
+ d2 = data2;
+ p1 = (struct vis_packet *)d1->skb_packet->data;
+ p2 = (struct vis_packet *)d2->skb_packet->data;
+ return compare_orig(p1->vis_orig, p2->vis_orig);
+}
+
+/* hash function to choose an entry in a hash table of given size */
+/* hash algorithm from http://en.wikipedia.org/wiki/Hash_table */
+static int vis_info_choose(void *data, int size)
+{
+ struct vis_info *vis_info = data;
+ struct vis_packet *packet;
+ unsigned char *key;
+ uint32_t hash = 0;
+ size_t i;
+
+ packet = (struct vis_packet *)vis_info->skb_packet->data;
+ key = packet->vis_orig;
+ for (i = 0; i < ETH_ALEN; i++) {
+ hash += key[i];
+ hash += (hash << 10);
+ hash ^= (hash >> 6);
+ }
+
+ hash += (hash << 3);
+ hash ^= (hash >> 11);
+ hash += (hash << 15);
+
+ return hash % size;
+}
+
+/* insert interface to the list of interfaces of one originator, if it
+ * does not already exist in the list */
+static void vis_data_insert_interface(const uint8_t *interface,
+ struct hlist_head *if_list,
+ bool primary)
+{
+ struct if_list_entry *entry;
+ struct hlist_node *pos;
+
+ hlist_for_each_entry(entry, pos, if_list, list) {
+ if (compare_orig(entry->addr, (void *)interface))
+ return;
+ }
+
+ /* its a new address, add it to the list */
+ entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
+ if (!entry)
+ return;
+ memcpy(entry->addr, interface, ETH_ALEN);
+ entry->primary = primary;
+ hlist_add_head(&entry->list, if_list);
+}
+
+static ssize_t vis_data_read_prim_sec(char *buff, struct hlist_head *if_list)
+{
+ struct if_list_entry *entry;
+ struct hlist_node *pos;
+ size_t len = 0;
+
+ hlist_for_each_entry(entry, pos, if_list, list) {
+ if (entry->primary)
+ len += sprintf(buff + len, "PRIMARY, ");
+ else
+ len += sprintf(buff + len, "SEC %pM, ", entry->addr);
+ }
+
+ return len;
+}
+
+static size_t vis_data_count_prim_sec(struct hlist_head *if_list)
+{
+ struct if_list_entry *entry;
+ struct hlist_node *pos;
+ size_t count = 0;
+
+ hlist_for_each_entry(entry, pos, if_list, list) {
+ if (entry->primary)
+ count += 9;
+ else
+ count += 23;
+ }
+
+ return count;
+}
+
+/* read an entry */
+static ssize_t vis_data_read_entry(char *buff, struct vis_info_entry *entry,
+ uint8_t *src, bool primary)
+{
+ /* maximal length: max(4+17+2, 3+17+1+3+2) == 26 */
+ if (primary && entry->quality == 0)
+ return sprintf(buff, "HNA %pM, ", entry->dest);
+ else if (compare_orig(entry->src, src))
+ return sprintf(buff, "TQ %pM %d, ", entry->dest,
+ entry->quality);
+
+ return 0;
+}
+
+int vis_seq_print_text(struct seq_file *seq, void *offset)
+{
+ struct hlist_node *walk;
+ struct hlist_head *head;
+ struct element_t *bucket;
+ struct vis_info *info;
+ struct vis_packet *packet;
+ struct vis_info_entry *entries;
+ struct net_device *net_dev = (struct net_device *)seq->private;
+ struct bat_priv *bat_priv = netdev_priv(net_dev);
+ struct hashtable_t *hash = bat_priv->vis_hash;
+ HLIST_HEAD(vis_if_list);
+ struct if_list_entry *entry;
+ struct hlist_node *pos, *n;
+ int i, j;
+ int vis_server = atomic_read(&bat_priv->vis_mode);
+ size_t buff_pos, buf_size;
+ char *buff;
+ int compare;
+
+ if ((!bat_priv->primary_if) ||
+ (vis_server == VIS_TYPE_CLIENT_UPDATE))
+ return 0;
+
+ buf_size = 1;
+ /* Estimate length */
+ spin_lock_bh(&bat_priv->vis_hash_lock);
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry(bucket, walk, head, hlist) {
+ info = bucket->data;
+ packet = (struct vis_packet *)info->skb_packet->data;
+ entries = (struct vis_info_entry *)
+ ((char *)packet + sizeof(struct vis_packet));
+
+ for (j = 0; j < packet->entries; j++) {
+ if (entries[j].quality == 0)
+ continue;
+ compare =
+ compare_orig(entries[j].src, packet->vis_orig);
+ vis_data_insert_interface(entries[j].src,
+ &vis_if_list,
+ compare);
+ }
+
+ hlist_for_each_entry(entry, pos, &vis_if_list, list) {
+ buf_size += 18 + 26 * packet->entries;
+
+ /* add primary/secondary records */
+ if (compare_orig(entry->addr, packet->vis_orig))
+ buf_size +=
+ vis_data_count_prim_sec(&vis_if_list);
+
+ buf_size += 1;
+ }
+
+ hlist_for_each_entry_safe(entry, pos, n, &vis_if_list,
+ list) {
+ hlist_del(&entry->list);
+ kfree(entry);
+ }
+ }
+ }
+
+ buff = kmalloc(buf_size, GFP_ATOMIC);
+ if (!buff) {
+ spin_unlock_bh(&bat_priv->vis_hash_lock);
+ return -ENOMEM;
+ }
+ buff[0] = '\0';
+ buff_pos = 0;
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry(bucket, walk, head, hlist) {
+ info = bucket->data;
+ packet = (struct vis_packet *)info->skb_packet->data;
+ entries = (struct vis_info_entry *)
+ ((char *)packet + sizeof(struct vis_packet));
+
+ for (j = 0; j < packet->entries; j++) {
+ if (entries[j].quality == 0)
+ continue;
+ compare =
+ compare_orig(entries[j].src, packet->vis_orig);
+ vis_data_insert_interface(entries[j].src,
+ &vis_if_list,
+ compare);
+ }
+
+ hlist_for_each_entry(entry, pos, &vis_if_list, list) {
+ buff_pos += sprintf(buff + buff_pos, "%pM,",
+ entry->addr);
+
+ for (i = 0; i < packet->entries; i++)
+ buff_pos += vis_data_read_entry(
+ buff + buff_pos,
+ &entries[i],
+ entry->addr,
+ entry->primary);
+
+ /* add primary/secondary records */
+ if (compare_orig(entry->addr, packet->vis_orig))
+ buff_pos +=
+ vis_data_read_prim_sec(buff + buff_pos,
+ &vis_if_list);
+
+ buff_pos += sprintf(buff + buff_pos, "\n");
+ }
+
+ hlist_for_each_entry_safe(entry, pos, n, &vis_if_list,
+ list) {
+ hlist_del(&entry->list);
+ kfree(entry);
+ }
+ }
+ }
+
+ spin_unlock_bh(&bat_priv->vis_hash_lock);
+
+ seq_printf(seq, "%s", buff);
+ kfree(buff);
+
+ return 0;
+}
+
+/* add the info packet to the send list, if it was not
+ * already linked in. */
+static void send_list_add(struct bat_priv *bat_priv, struct vis_info *info)
+{
+ if (list_empty(&info->send_list)) {
+ kref_get(&info->refcount);
+ list_add_tail(&info->send_list, &bat_priv->vis_send_list);
+ }
+}
+
+/* delete the info packet from the send list, if it was
+ * linked in. */
+static void send_list_del(struct vis_info *info)
+{
+ if (!list_empty(&info->send_list)) {
+ list_del_init(&info->send_list);
+ kref_put(&info->refcount, free_info);
+ }
+}
+
+/* tries to add one entry to the receive list. */
+static void recv_list_add(struct bat_priv *bat_priv,
+ struct list_head *recv_list, char *mac)
+{
+ struct recvlist_node *entry;
+
+ entry = kmalloc(sizeof(struct recvlist_node), GFP_ATOMIC);
+ if (!entry)
+ return;
+
+ memcpy(entry->mac, mac, ETH_ALEN);
+ spin_lock_bh(&bat_priv->vis_list_lock);
+ list_add_tail(&entry->list, recv_list);
+ spin_unlock_bh(&bat_priv->vis_list_lock);
+}
+
+/* returns 1 if this mac is in the recv_list */
+static int recv_list_is_in(struct bat_priv *bat_priv,
+ struct list_head *recv_list, char *mac)
+{
+ struct recvlist_node *entry;
+
+ spin_lock_bh(&bat_priv->vis_list_lock);
+ list_for_each_entry(entry, recv_list, list) {
+ if (memcmp(entry->mac, mac, ETH_ALEN) == 0) {
+ spin_unlock_bh(&bat_priv->vis_list_lock);
+ return 1;
+ }
+ }
+ spin_unlock_bh(&bat_priv->vis_list_lock);
+ return 0;
+}
+
+/* try to add the packet to the vis_hash. return NULL if invalid (e.g. too old,
+ * broken.. ). vis hash must be locked outside. is_new is set when the packet
+ * is newer than old entries in the hash. */
+static struct vis_info *add_packet(struct bat_priv *bat_priv,
+ struct vis_packet *vis_packet,
+ int vis_info_len, int *is_new,
+ int make_broadcast)
+{
+ struct vis_info *info, *old_info;
+ struct vis_packet *search_packet, *old_packet;
+ struct vis_info search_elem;
+ struct vis_packet *packet;
+ int hash_added;
+
+ *is_new = 0;
+ /* sanity check */
+ if (!bat_priv->vis_hash)
+ return NULL;
+
+ /* see if the packet is already in vis_hash */
+ search_elem.skb_packet = dev_alloc_skb(sizeof(struct vis_packet));
+ if (!search_elem.skb_packet)
+ return NULL;
+ search_packet = (struct vis_packet *)skb_put(search_elem.skb_packet,
+ sizeof(struct vis_packet));
+
+ memcpy(search_packet->vis_orig, vis_packet->vis_orig, ETH_ALEN);
+ old_info = hash_find(bat_priv->vis_hash, vis_info_cmp, vis_info_choose,
+ &search_elem);
+ kfree_skb(search_elem.skb_packet);
+
+ if (old_info) {
+ old_packet = (struct vis_packet *)old_info->skb_packet->data;
+ if (!seq_after(ntohl(vis_packet->seqno),
+ ntohl(old_packet->seqno))) {
+ if (old_packet->seqno == vis_packet->seqno) {
+ recv_list_add(bat_priv, &old_info->recv_list,
+ vis_packet->sender_orig);
+ return old_info;
+ } else {
+ /* newer packet is already in hash. */
+ return NULL;
+ }
+ }
+ /* remove old entry */
+ hash_remove(bat_priv->vis_hash, vis_info_cmp, vis_info_choose,
+ old_info);
+ send_list_del(old_info);
+ kref_put(&old_info->refcount, free_info);
+ }
+
+ info = kmalloc(sizeof(struct vis_info), GFP_ATOMIC);
+ if (!info)
+ return NULL;
+
+ info->skb_packet = dev_alloc_skb(sizeof(struct vis_packet) +
+ vis_info_len + sizeof(struct ethhdr));
+ if (!info->skb_packet) {
+ kfree(info);
+ return NULL;
+ }
+ skb_reserve(info->skb_packet, sizeof(struct ethhdr));
+ packet = (struct vis_packet *)skb_put(info->skb_packet,
+ sizeof(struct vis_packet) +
+ vis_info_len);
+
+ kref_init(&info->refcount);
+ INIT_LIST_HEAD(&info->send_list);
+ INIT_LIST_HEAD(&info->recv_list);
+ info->first_seen = jiffies;
+ info->bat_priv = bat_priv;
+ memcpy(packet, vis_packet, sizeof(struct vis_packet) + vis_info_len);
+
+ /* initialize and add new packet. */
+ *is_new = 1;
+
+ /* Make it a broadcast packet, if required */
+ if (make_broadcast)
+ memcpy(packet->target_orig, broadcast_addr, ETH_ALEN);
+
+ /* repair if entries is longer than packet. */
+ if (packet->entries * sizeof(struct vis_info_entry) > vis_info_len)
+ packet->entries = vis_info_len / sizeof(struct vis_info_entry);
+
+ recv_list_add(bat_priv, &info->recv_list, packet->sender_orig);
+
+ /* try to add it */
+ hash_added = hash_add(bat_priv->vis_hash, vis_info_cmp, vis_info_choose,
+ info);
+ if (hash_added < 0) {
+ /* did not work (for some reason) */
+ kref_put(&old_info->refcount, free_info);
+ info = NULL;
+ }
+
+ return info;
+}
+
+/* handle the server sync packet, forward if needed. */
+void receive_server_sync_packet(struct bat_priv *bat_priv,
+ struct vis_packet *vis_packet,
+ int vis_info_len)
+{
+ struct vis_info *info;
+ int is_new, make_broadcast;
+ int vis_server = atomic_read(&bat_priv->vis_mode);
+
+ make_broadcast = (vis_server == VIS_TYPE_SERVER_SYNC);
+
+ spin_lock_bh(&bat_priv->vis_hash_lock);
+ info = add_packet(bat_priv, vis_packet, vis_info_len,
+ &is_new, make_broadcast);
+ if (!info)
+ goto end;
+
+ /* only if we are server ourselves and packet is newer than the one in
+ * hash.*/
+ if (vis_server == VIS_TYPE_SERVER_SYNC && is_new)
+ send_list_add(bat_priv, info);
+end:
+ spin_unlock_bh(&bat_priv->vis_hash_lock);
+}
+
+/* handle an incoming client update packet and schedule forward if needed. */
+void receive_client_update_packet(struct bat_priv *bat_priv,
+ struct vis_packet *vis_packet,
+ int vis_info_len)
+{
+ struct vis_info *info;
+ struct vis_packet *packet;
+ int is_new;
+ int vis_server = atomic_read(&bat_priv->vis_mode);
+ int are_target = 0;
+
+ /* clients shall not broadcast. */
+ if (is_broadcast_ether_addr(vis_packet->target_orig))
+ return;
+
+ /* Are we the target for this VIS packet? */
+ if (vis_server == VIS_TYPE_SERVER_SYNC &&
+ is_my_mac(vis_packet->target_orig))
+ are_target = 1;
+
+ spin_lock_bh(&bat_priv->vis_hash_lock);
+ info = add_packet(bat_priv, vis_packet, vis_info_len,
+ &is_new, are_target);
+
+ if (!info)
+ goto end;
+ /* note that outdated packets will be dropped at this point. */
+
+ packet = (struct vis_packet *)info->skb_packet->data;
+
+ /* send only if we're the target server or ... */
+ if (are_target && is_new) {
+ packet->vis_type = VIS_TYPE_SERVER_SYNC; /* upgrade! */
+ send_list_add(bat_priv, info);
+
+ /* ... we're not the recipient (and thus need to forward). */
+ } else if (!is_my_mac(packet->target_orig)) {
+ send_list_add(bat_priv, info);
+ }
+
+end:
+ spin_unlock_bh(&bat_priv->vis_hash_lock);
+}
+
+/* Walk the originators and find the VIS server with the best tq. Set the packet
+ * address to its address and return the best_tq.
+ *
+ * Must be called with the originator hash locked */
+static int find_best_vis_server(struct bat_priv *bat_priv,
+ struct vis_info *info)
+{
+ struct hashtable_t *hash = bat_priv->orig_hash;
+ struct hlist_node *walk;
+ struct hlist_head *head;
+ struct element_t *bucket;
+ struct orig_node *orig_node;
+ struct vis_packet *packet;
+ int best_tq = -1, i;
+
+ packet = (struct vis_packet *)info->skb_packet->data;
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry(bucket, walk, head, hlist) {
+ orig_node = bucket->data;
+ if ((orig_node) && (orig_node->router) &&
+ (orig_node->flags & VIS_SERVER) &&
+ (orig_node->router->tq_avg > best_tq)) {
+ best_tq = orig_node->router->tq_avg;
+ memcpy(packet->target_orig, orig_node->orig,
+ ETH_ALEN);
+ }
+ }
+ }
+
+ return best_tq;
+}
+
+/* Return true if the vis packet is full. */
+static bool vis_packet_full(struct vis_info *info)
+{
+ struct vis_packet *packet;
+ packet = (struct vis_packet *)info->skb_packet->data;
+
+ if (MAX_VIS_PACKET_SIZE / sizeof(struct vis_info_entry)
+ < packet->entries + 1)
+ return true;
+ return false;
+}
+
+/* generates a packet of own vis data,
+ * returns 0 on success, -1 if no packet could be generated */
+static int generate_vis_packet(struct bat_priv *bat_priv)
+{
+ struct hashtable_t *hash = bat_priv->orig_hash;
+ struct hlist_node *walk;
+ struct hlist_head *head;
+ struct element_t *bucket;
+ struct orig_node *orig_node;
+ struct neigh_node *neigh_node;
+ struct vis_info *info = (struct vis_info *)bat_priv->my_vis_info;
+ struct vis_packet *packet = (struct vis_packet *)info->skb_packet->data;
+ struct vis_info_entry *entry;
+ struct hna_local_entry *hna_local_entry;
+ int best_tq = -1, i;
+
+ info->first_seen = jiffies;
+ packet->vis_type = atomic_read(&bat_priv->vis_mode);
+
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+ memcpy(packet->target_orig, broadcast_addr, ETH_ALEN);
+ packet->ttl = TTL;
+ packet->seqno = htonl(ntohl(packet->seqno) + 1);
+ packet->entries = 0;
+ skb_trim(info->skb_packet, sizeof(struct vis_packet));
+
+ if (packet->vis_type == VIS_TYPE_CLIENT_UPDATE) {
+ best_tq = find_best_vis_server(bat_priv, info);
+
+ if (best_tq < 0) {
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+ return -1;
+ }
+ }
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry(bucket, walk, head, hlist) {
+ orig_node = bucket->data;
+ neigh_node = orig_node->router;
+
+ if (!neigh_node)
+ continue;
+
+ if (!compare_orig(neigh_node->addr, orig_node->orig))
+ continue;
+
+ if (neigh_node->if_incoming->if_status != IF_ACTIVE)
+ continue;
+
+ if (neigh_node->tq_avg < 1)
+ continue;
+
+ /* fill one entry into buffer. */
+ entry = (struct vis_info_entry *)
+ skb_put(info->skb_packet, sizeof(*entry));
+ memcpy(entry->src,
+ neigh_node->if_incoming->net_dev->dev_addr,
+ ETH_ALEN);
+ memcpy(entry->dest, orig_node->orig, ETH_ALEN);
+ entry->quality = neigh_node->tq_avg;
+ packet->entries++;
+
+ if (vis_packet_full(info)) {
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+ return 0;
+ }
+ }
+ }
+
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ hash = bat_priv->hna_local_hash;
+
+ spin_lock_bh(&bat_priv->hna_lhash_lock);
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry(bucket, walk, head, hlist) {
+ hna_local_entry = bucket->data;
+ entry = (struct vis_info_entry *)
+ skb_put(info->skb_packet,
+ sizeof(*entry));
+ memset(entry->src, 0, ETH_ALEN);
+ memcpy(entry->dest, hna_local_entry->addr, ETH_ALEN);
+ entry->quality = 0; /* 0 means HNA */
+ packet->entries++;
+
+ if (vis_packet_full(info)) {
+ spin_unlock_bh(&bat_priv->hna_lhash_lock);
+ return 0;
+ }
+ }
+ }
+
+ spin_unlock_bh(&bat_priv->hna_lhash_lock);
+ return 0;
+}
+
+/* free old vis packets. Must be called with this vis_hash_lock
+ * held */
+static void purge_vis_packets(struct bat_priv *bat_priv)
+{
+ int i;
+ struct hashtable_t *hash = bat_priv->vis_hash;
+ struct hlist_node *walk, *safe;
+ struct hlist_head *head;
+ struct element_t *bucket;
+ struct vis_info *info;
+
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry_safe(bucket, walk, safe, head, hlist) {
+ info = bucket->data;
+
+ /* never purge own data. */
+ if (info == bat_priv->my_vis_info)
+ continue;
+
+ if (time_after(jiffies,
+ info->first_seen + VIS_TIMEOUT * HZ)) {
+ hlist_del(walk);
+ kfree(bucket);
+ send_list_del(info);
+ kref_put(&info->refcount, free_info);
+ }
+ }
+ }
+}
+
+static void broadcast_vis_packet(struct bat_priv *bat_priv,
+ struct vis_info *info)
+{
+ struct hashtable_t *hash = bat_priv->orig_hash;
+ struct hlist_node *walk;
+ struct hlist_head *head;
+ struct element_t *bucket;
+ struct orig_node *orig_node;
+ struct vis_packet *packet;
+ struct sk_buff *skb;
+ struct batman_if *batman_if;
+ uint8_t dstaddr[ETH_ALEN];
+ int i;
+
+
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+ packet = (struct vis_packet *)info->skb_packet->data;
+
+ /* send to all routers in range. */
+ for (i = 0; i < hash->size; i++) {
+ head = &hash->table[i];
+
+ hlist_for_each_entry(bucket, walk, head, hlist) {
+ orig_node = bucket->data;
+
+ /* if it's a vis server and reachable, send it. */
+ if ((!orig_node) || (!orig_node->router))
+ continue;
+ if (!(orig_node->flags & VIS_SERVER))
+ continue;
+ /* don't send it if we already received the packet from
+ * this node. */
+ if (recv_list_is_in(bat_priv, &info->recv_list,
+ orig_node->orig))
+ continue;
+
+ memcpy(packet->target_orig, orig_node->orig, ETH_ALEN);
+ batman_if = orig_node->router->if_incoming;
+ memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ skb = skb_clone(info->skb_packet, GFP_ATOMIC);
+ if (skb)
+ send_skb_packet(skb, batman_if, dstaddr);
+
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+ }
+
+ }
+
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+}
+
+static void unicast_vis_packet(struct bat_priv *bat_priv,
+ struct vis_info *info)
+{
+ struct orig_node *orig_node;
+ struct sk_buff *skb;
+ struct vis_packet *packet;
+ struct batman_if *batman_if;
+ uint8_t dstaddr[ETH_ALEN];
+
+ spin_lock_bh(&bat_priv->orig_hash_lock);
+ packet = (struct vis_packet *)info->skb_packet->data;
+ orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
+ compare_orig, choose_orig,
+ packet->target_orig));
+
+ if ((!orig_node) || (!orig_node->router))
+ goto out;
+
+ /* don't lock while sending the packets ... we therefore
+ * copy the required data before sending */
+ batman_if = orig_node->router->if_incoming;
+ memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+ skb = skb_clone(info->skb_packet, GFP_ATOMIC);
+ if (skb)
+ send_skb_packet(skb, batman_if, dstaddr);
+
+ return;
+
+out:
+ spin_unlock_bh(&bat_priv->orig_hash_lock);
+}
+
+/* only send one vis packet. called from send_vis_packets() */
+static void send_vis_packet(struct bat_priv *bat_priv, struct vis_info *info)
+{
+ struct vis_packet *packet;
+
+ packet = (struct vis_packet *)info->skb_packet->data;
+ if (packet->ttl < 2) {
+ pr_debug("Error - can't send vis packet: ttl exceeded\n");
+ return;
+ }
+
+ memcpy(packet->sender_orig, bat_priv->primary_if->net_dev->dev_addr,
+ ETH_ALEN);
+ packet->ttl--;
+
+ if (is_broadcast_ether_addr(packet->target_orig))
+ broadcast_vis_packet(bat_priv, info);
+ else
+ unicast_vis_packet(bat_priv, info);
+ packet->ttl++; /* restore TTL */
+}
+
+/* called from timer; send (and maybe generate) vis packet. */
+static void send_vis_packets(struct work_struct *work)
+{
+ struct delayed_work *delayed_work =
+ container_of(work, struct delayed_work, work);
+ struct bat_priv *bat_priv =
+ container_of(delayed_work, struct bat_priv, vis_work);
+ struct vis_info *info, *temp;
+
+ spin_lock_bh(&bat_priv->vis_hash_lock);
+ purge_vis_packets(bat_priv);
+
+ if (generate_vis_packet(bat_priv) == 0) {
+ /* schedule if generation was successful */
+ send_list_add(bat_priv, bat_priv->my_vis_info);
+ }
+
+ list_for_each_entry_safe(info, temp, &bat_priv->vis_send_list,
+ send_list) {
+
+ kref_get(&info->refcount);
+ spin_unlock_bh(&bat_priv->vis_hash_lock);
+
+ if (bat_priv->primary_if)
+ send_vis_packet(bat_priv, info);
+
+ spin_lock_bh(&bat_priv->vis_hash_lock);
+ send_list_del(info);
+ kref_put(&info->refcount, free_info);
+ }
+ spin_unlock_bh(&bat_priv->vis_hash_lock);
+ start_vis_timer(bat_priv);
+}
+
+/* init the vis server. this may only be called when if_list is already
+ * initialized (e.g. bat0 is initialized, interfaces have been added) */
+int vis_init(struct bat_priv *bat_priv)
+{
+ struct vis_packet *packet;
+ int hash_added;
+
+ if (bat_priv->vis_hash)
+ return 1;
+
+ spin_lock_bh(&bat_priv->vis_hash_lock);
+
+ bat_priv->vis_hash = hash_new(256);
+ if (!bat_priv->vis_hash) {
+ pr_err("Can't initialize vis_hash\n");
+ goto err;
+ }
+
+ bat_priv->my_vis_info = kmalloc(MAX_VIS_PACKET_SIZE, GFP_ATOMIC);
+ if (!bat_priv->my_vis_info) {
+ pr_err("Can't initialize vis packet\n");
+ goto err;
+ }
+
+ bat_priv->my_vis_info->skb_packet = dev_alloc_skb(
+ sizeof(struct vis_packet) +
+ MAX_VIS_PACKET_SIZE +
+ sizeof(struct ethhdr));
+ if (!bat_priv->my_vis_info->skb_packet)
+ goto free_info;
+
+ skb_reserve(bat_priv->my_vis_info->skb_packet, sizeof(struct ethhdr));
+ packet = (struct vis_packet *)skb_put(
+ bat_priv->my_vis_info->skb_packet,
+ sizeof(struct vis_packet));
+
+ /* prefill the vis info */
+ bat_priv->my_vis_info->first_seen = jiffies -
+ msecs_to_jiffies(VIS_INTERVAL);
+ INIT_LIST_HEAD(&bat_priv->my_vis_info->recv_list);
+ INIT_LIST_HEAD(&bat_priv->my_vis_info->send_list);
+ kref_init(&bat_priv->my_vis_info->refcount);
+ bat_priv->my_vis_info->bat_priv = bat_priv;
+ packet->version = COMPAT_VERSION;
+ packet->packet_type = BAT_VIS;
+ packet->ttl = TTL;
+ packet->seqno = 0;
+ packet->entries = 0;
+
+ INIT_LIST_HEAD(&bat_priv->vis_send_list);
+
+ hash_added = hash_add(bat_priv->vis_hash, vis_info_cmp, vis_info_choose,
+ bat_priv->my_vis_info);
+ if (hash_added < 0) {
+ pr_err("Can't add own vis packet into hash\n");
+ /* not in hash, need to remove it manually. */
+ kref_put(&bat_priv->my_vis_info->refcount, free_info);
+ goto err;
+ }
+
+ spin_unlock_bh(&bat_priv->vis_hash_lock);
+ start_vis_timer(bat_priv);
+ return 1;
+
+free_info:
+ kfree(bat_priv->my_vis_info);
+ bat_priv->my_vis_info = NULL;
+err:
+ spin_unlock_bh(&bat_priv->vis_hash_lock);
+ vis_quit(bat_priv);
+ return 0;
+}
+
+/* Decrease the reference count on a hash item info */
+static void free_info_ref(void *data, void *arg)
+{
+ struct vis_info *info = data;
+
+ send_list_del(info);
+ kref_put(&info->refcount, free_info);
+}
+
+/* shutdown vis-server */
+void vis_quit(struct bat_priv *bat_priv)
+{
+ if (!bat_priv->vis_hash)
+ return;
+
+ cancel_delayed_work_sync(&bat_priv->vis_work);
+
+ spin_lock_bh(&bat_priv->vis_hash_lock);
+ /* properly remove, kill timers ... */
+ hash_delete(bat_priv->vis_hash, free_info_ref, NULL);
+ bat_priv->vis_hash = NULL;
+ bat_priv->my_vis_info = NULL;
+ spin_unlock_bh(&bat_priv->vis_hash_lock);
+}
+
+/* schedule packets for (re)transmission */
+static void start_vis_timer(struct bat_priv *bat_priv)
+{
+ INIT_DELAYED_WORK(&bat_priv->vis_work, send_vis_packets);
+ queue_delayed_work(bat_event_workqueue, &bat_priv->vis_work,
+ msecs_to_jiffies(VIS_INTERVAL));
+}
--- /dev/null
+/*
+ * Copyright (C) 2008-2010 B.A.T.M.A.N. contributors:
+ *
+ * Simon Wunderlich, Marek Lindner
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ *
+ */
+
+#ifndef _NET_BATMAN_ADV_VIS_H_
+#define _NET_BATMAN_ADV_VIS_H_
+
+#define VIS_TIMEOUT 200 /* timeout of vis packets in seconds */
+
+int vis_seq_print_text(struct seq_file *seq, void *offset);
+void receive_server_sync_packet(struct bat_priv *bat_priv,
+ struct vis_packet *vis_packet,
+ int vis_info_len);
+void receive_client_update_packet(struct bat_priv *bat_priv,
+ struct vis_packet *vis_packet,
+ int vis_info_len);
+int vis_init(struct bat_priv *bat_priv);
+void vis_quit(struct bat_priv *bat_priv);
+
+#endif /* _NET_BATMAN_ADV_VIS_H_ */
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff