1 /* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 #include "soft-interface.h"
22 #include "hard-interface.h"
26 #include "translation-table.h"
28 #include "gateway_common.h"
29 #include "gateway_client.h"
31 #include "originator.h"
32 #include <linux/slab.h>
33 #include <linux/ethtool.h>
34 #include <linux/etherdevice.h>
35 #include <linux/if_vlan.h>
37 #include "bridge_loop_avoidance.h"
40 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
);
41 static void batadv_get_drvinfo(struct net_device
*dev
,
42 struct ethtool_drvinfo
*info
);
43 static u32
batadv_get_msglevel(struct net_device
*dev
);
44 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
);
45 static u32
batadv_get_link(struct net_device
*dev
);
46 static void batadv_get_strings(struct net_device
*dev
, u32 stringset
, u8
*data
);
47 static void batadv_get_ethtool_stats(struct net_device
*dev
,
48 struct ethtool_stats
*stats
, u64
*data
);
49 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
);
51 static const struct ethtool_ops batadv_ethtool_ops
= {
52 .get_settings
= batadv_get_settings
,
53 .get_drvinfo
= batadv_get_drvinfo
,
54 .get_msglevel
= batadv_get_msglevel
,
55 .set_msglevel
= batadv_set_msglevel
,
56 .get_link
= batadv_get_link
,
57 .get_strings
= batadv_get_strings
,
58 .get_ethtool_stats
= batadv_get_ethtool_stats
,
59 .get_sset_count
= batadv_get_sset_count
,
62 int batadv_skb_head_push(struct sk_buff
*skb
, unsigned int len
)
66 /* TODO: We must check if we can release all references to non-payload
67 * data using skb_header_release in our skbs to allow skb_cow_header to
68 * work optimally. This means that those skbs are not allowed to read
69 * or write any data which is before the current position of skb->data
70 * after that call and thus allow other skbs with the same data buffer
71 * to write freely in that area.
73 result
= skb_cow_head(skb
, len
);
81 static int batadv_interface_open(struct net_device
*dev
)
83 netif_start_queue(dev
);
87 static int batadv_interface_release(struct net_device
*dev
)
89 netif_stop_queue(dev
);
93 static struct net_device_stats
*batadv_interface_stats(struct net_device
*dev
)
95 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
96 return &bat_priv
->stats
;
99 static int batadv_interface_set_mac_addr(struct net_device
*dev
, void *p
)
101 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
102 struct sockaddr
*addr
= p
;
103 uint8_t old_addr
[ETH_ALEN
];
105 if (!is_valid_ether_addr(addr
->sa_data
))
106 return -EADDRNOTAVAIL
;
108 memcpy(old_addr
, dev
->dev_addr
, ETH_ALEN
);
109 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
111 /* only modify transtable if it has been initialized before */
112 if (atomic_read(&bat_priv
->mesh_state
) == BATADV_MESH_ACTIVE
) {
113 batadv_tt_local_remove(bat_priv
, old_addr
,
114 "mac address changed", false);
115 batadv_tt_local_add(dev
, addr
->sa_data
, BATADV_NULL_IFINDEX
);
118 dev
->addr_assign_type
&= ~NET_ADDR_RANDOM
;
122 static int batadv_interface_change_mtu(struct net_device
*dev
, int new_mtu
)
125 if ((new_mtu
< 68) || (new_mtu
> batadv_hardif_min_mtu(dev
)))
133 static int batadv_interface_tx(struct sk_buff
*skb
,
134 struct net_device
*soft_iface
)
136 struct ethhdr
*ethhdr
= (struct ethhdr
*)skb
->data
;
137 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
138 struct batadv_hard_iface
*primary_if
= NULL
;
139 struct batadv_bcast_packet
*bcast_packet
;
140 struct vlan_ethhdr
*vhdr
;
141 __be16 ethertype
= __constant_htons(BATADV_ETH_P_BATMAN
);
142 static const uint8_t stp_addr
[ETH_ALEN
] = {0x01, 0x80, 0xC2, 0x00, 0x00,
144 unsigned int header_len
= 0;
145 int data_len
= skb
->len
, ret
;
146 short vid __maybe_unused
= -1;
147 bool do_bcast
= false;
149 if (atomic_read(&bat_priv
->mesh_state
) != BATADV_MESH_ACTIVE
)
152 soft_iface
->trans_start
= jiffies
;
154 switch (ntohs(ethhdr
->h_proto
)) {
156 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
157 vid
= ntohs(vhdr
->h_vlan_TCI
) & VLAN_VID_MASK
;
159 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
)
163 case BATADV_ETH_P_BATMAN
:
167 if (batadv_bla_tx(bat_priv
, skb
, vid
))
170 /* Register the client MAC in the transtable */
171 batadv_tt_local_add(soft_iface
, ethhdr
->h_source
, skb
->skb_iif
);
173 /* don't accept stp packets. STP does not help in meshes.
174 * better use the bridge loop avoidance ...
176 if (batadv_compare_eth(ethhdr
->h_dest
, stp_addr
))
179 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
182 switch (atomic_read(&bat_priv
->gw_mode
)) {
183 case BATADV_GW_MODE_SERVER
:
184 /* gateway servers should not send dhcp
185 * requests into the mesh
187 ret
= batadv_gw_is_dhcp_target(skb
, &header_len
);
191 case BATADV_GW_MODE_CLIENT
:
192 /* gateway clients should send dhcp requests
193 * via unicast to their gateway
195 ret
= batadv_gw_is_dhcp_target(skb
, &header_len
);
199 case BATADV_GW_MODE_OFF
:
205 /* ethernet packet should be broadcasted */
207 primary_if
= batadv_primary_if_get_selected(bat_priv
);
211 if (batadv_skb_head_push(skb
, sizeof(*bcast_packet
)) < 0)
214 bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
215 bcast_packet
->header
.version
= BATADV_COMPAT_VERSION
;
216 bcast_packet
->header
.ttl
= BATADV_TTL
;
218 /* batman packet type: broadcast */
219 bcast_packet
->header
.packet_type
= BATADV_BCAST
;
220 bcast_packet
->reserved
= 0;
222 /* hw address of first interface is the orig mac because only
223 * this mac is known throughout the mesh
225 memcpy(bcast_packet
->orig
,
226 primary_if
->net_dev
->dev_addr
, ETH_ALEN
);
228 /* set broadcast sequence number */
229 bcast_packet
->seqno
=
230 htonl(atomic_inc_return(&bat_priv
->bcast_seqno
));
232 batadv_add_bcast_packet_to_list(bat_priv
, skb
, 1);
234 /* a copy is stored in the bcast list, therefore removing
241 if (atomic_read(&bat_priv
->gw_mode
) != BATADV_GW_MODE_OFF
) {
242 ret
= batadv_gw_out_of_range(bat_priv
, skb
, ethhdr
);
247 ret
= batadv_unicast_send_skb(skb
, bat_priv
);
252 bat_priv
->stats
.tx_packets
++;
253 bat_priv
->stats
.tx_bytes
+= data_len
;
259 bat_priv
->stats
.tx_dropped
++;
262 batadv_hardif_free_ref(primary_if
);
266 void batadv_interface_rx(struct net_device
*soft_iface
,
267 struct sk_buff
*skb
, struct batadv_hard_iface
*recv_if
,
270 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
271 struct ethhdr
*ethhdr
;
272 struct vlan_ethhdr
*vhdr
;
273 struct batadv_header
*batadv_header
= (struct batadv_header
*)skb
->data
;
274 short vid __maybe_unused
= -1;
275 __be16 ethertype
= __constant_htons(BATADV_ETH_P_BATMAN
);
278 is_bcast
= (batadv_header
->packet_type
== BATADV_BCAST
);
280 /* check if enough space is available for pulling, and pull */
281 if (!pskb_may_pull(skb
, hdr_size
))
284 skb_pull_rcsum(skb
, hdr_size
);
285 skb_reset_mac_header(skb
);
287 ethhdr
= (struct ethhdr
*)skb_mac_header(skb
);
289 switch (ntohs(ethhdr
->h_proto
)) {
291 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
292 vid
= ntohs(vhdr
->h_vlan_TCI
) & VLAN_VID_MASK
;
294 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
)
298 case BATADV_ETH_P_BATMAN
:
302 /* skb->dev & skb->pkt_type are set here */
303 if (unlikely(!pskb_may_pull(skb
, ETH_HLEN
)))
305 skb
->protocol
= eth_type_trans(skb
, soft_iface
);
307 /* should not be necessary anymore as we use skb_pull_rcsum()
308 * TODO: please verify this and remove this TODO
309 * -- Dec 21st 2009, Simon Wunderlich
312 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
314 bat_priv
->stats
.rx_packets
++;
315 bat_priv
->stats
.rx_bytes
+= skb
->len
+ ETH_HLEN
;
317 soft_iface
->last_rx
= jiffies
;
319 if (batadv_is_ap_isolated(bat_priv
, ethhdr
->h_source
, ethhdr
->h_dest
))
322 /* Let the bridge loop avoidance check the packet. If will
323 * not handle it, we can safely push it up.
325 if (batadv_bla_rx(bat_priv
, skb
, vid
, is_bcast
))
337 static const struct net_device_ops batadv_netdev_ops
= {
338 .ndo_open
= batadv_interface_open
,
339 .ndo_stop
= batadv_interface_release
,
340 .ndo_get_stats
= batadv_interface_stats
,
341 .ndo_set_mac_address
= batadv_interface_set_mac_addr
,
342 .ndo_change_mtu
= batadv_interface_change_mtu
,
343 .ndo_start_xmit
= batadv_interface_tx
,
344 .ndo_validate_addr
= eth_validate_addr
347 static void batadv_interface_setup(struct net_device
*dev
)
349 struct batadv_priv
*priv
= netdev_priv(dev
);
353 dev
->netdev_ops
= &batadv_netdev_ops
;
354 dev
->destructor
= free_netdev
;
355 dev
->tx_queue_len
= 0;
357 /* can't call min_mtu, because the needed variables
358 * have not been initialized yet
360 dev
->mtu
= ETH_DATA_LEN
;
361 /* reserve more space in the skbuff for our header */
362 dev
->hard_header_len
= BATADV_HEADER_LEN
;
364 /* generate random address */
365 eth_hw_addr_random(dev
);
367 SET_ETHTOOL_OPS(dev
, &batadv_ethtool_ops
);
369 memset(priv
, 0, sizeof(*priv
));
372 struct net_device
*batadv_softif_create(const char *name
)
374 struct net_device
*soft_iface
;
375 struct batadv_priv
*bat_priv
;
377 size_t cnt_len
= sizeof(uint64_t) * BATADV_CNT_NUM
;
379 soft_iface
= alloc_netdev(sizeof(*bat_priv
), name
,
380 batadv_interface_setup
);
385 ret
= register_netdevice(soft_iface
);
387 pr_err("Unable to register the batman interface '%s': %i\n",
389 goto free_soft_iface
;
392 bat_priv
= netdev_priv(soft_iface
);
394 atomic_set(&bat_priv
->aggregated_ogms
, 1);
395 atomic_set(&bat_priv
->bonding
, 0);
396 atomic_set(&bat_priv
->bridge_loop_avoidance
, 0);
397 atomic_set(&bat_priv
->ap_isolation
, 0);
398 atomic_set(&bat_priv
->vis_mode
, BATADV_VIS_TYPE_CLIENT_UPDATE
);
399 atomic_set(&bat_priv
->gw_mode
, BATADV_GW_MODE_OFF
);
400 atomic_set(&bat_priv
->gw_sel_class
, 20);
401 atomic_set(&bat_priv
->gw_bandwidth
, 41);
402 atomic_set(&bat_priv
->orig_interval
, 1000);
403 atomic_set(&bat_priv
->hop_penalty
, 30);
404 atomic_set(&bat_priv
->log_level
, 0);
405 atomic_set(&bat_priv
->fragmentation
, 1);
406 atomic_set(&bat_priv
->bcast_queue_left
, BATADV_BCAST_QUEUE_LEN
);
407 atomic_set(&bat_priv
->batman_queue_left
, BATADV_BATMAN_QUEUE_LEN
);
409 atomic_set(&bat_priv
->mesh_state
, BATADV_MESH_INACTIVE
);
410 atomic_set(&bat_priv
->bcast_seqno
, 1);
411 atomic_set(&bat_priv
->ttvn
, 0);
412 atomic_set(&bat_priv
->tt_local_changes
, 0);
413 atomic_set(&bat_priv
->tt_ogm_append_cnt
, 0);
414 atomic_set(&bat_priv
->bla_num_requests
, 0);
416 bat_priv
->tt_buff
= NULL
;
417 bat_priv
->tt_buff_len
= 0;
418 bat_priv
->tt_poss_change
= false;
420 bat_priv
->primary_if
= NULL
;
421 bat_priv
->num_ifaces
= 0;
423 bat_priv
->bat_counters
= __alloc_percpu(cnt_len
, __alignof__(uint64_t));
424 if (!bat_priv
->bat_counters
)
425 goto unreg_soft_iface
;
427 ret
= batadv_algo_select(bat_priv
, batadv_routing_algo
);
429 goto free_bat_counters
;
431 ret
= batadv_sysfs_add_meshif(soft_iface
);
433 goto free_bat_counters
;
435 ret
= batadv_debugfs_add_meshif(soft_iface
);
439 ret
= batadv_mesh_init(soft_iface
);
446 batadv_debugfs_del_meshif(soft_iface
);
448 batadv_sysfs_del_meshif(soft_iface
);
450 free_percpu(bat_priv
->bat_counters
);
452 unregister_netdevice(soft_iface
);
456 free_netdev(soft_iface
);
461 void batadv_softif_destroy(struct net_device
*soft_iface
)
463 batadv_debugfs_del_meshif(soft_iface
);
464 batadv_sysfs_del_meshif(soft_iface
);
465 batadv_mesh_free(soft_iface
);
466 unregister_netdevice(soft_iface
);
469 int batadv_softif_is_valid(const struct net_device
*net_dev
)
471 if (net_dev
->netdev_ops
->ndo_start_xmit
== batadv_interface_tx
)
478 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
481 cmd
->advertising
= 0;
482 ethtool_cmd_speed_set(cmd
, SPEED_10
);
483 cmd
->duplex
= DUPLEX_FULL
;
485 cmd
->phy_address
= 0;
486 cmd
->transceiver
= XCVR_INTERNAL
;
487 cmd
->autoneg
= AUTONEG_DISABLE
;
494 static void batadv_get_drvinfo(struct net_device
*dev
,
495 struct ethtool_drvinfo
*info
)
497 strcpy(info
->driver
, "B.A.T.M.A.N. advanced");
498 strcpy(info
->version
, BATADV_SOURCE_VERSION
);
499 strcpy(info
->fw_version
, "N/A");
500 strcpy(info
->bus_info
, "batman");
503 static u32
batadv_get_msglevel(struct net_device
*dev
)
508 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
)
512 static u32
batadv_get_link(struct net_device
*dev
)
517 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
518 * Declare each description string in struct.name[] to get fixed sized buffer
519 * and compile time checking for strings longer than ETH_GSTRING_LEN.
521 static const struct {
522 const char name
[ETH_GSTRING_LEN
];
523 } batadv_counters_strings
[] = {
532 { "tt_response_tx" },
533 { "tt_response_rx" },
534 { "tt_roam_adv_tx" },
535 { "tt_roam_adv_rx" },
538 static void batadv_get_strings(struct net_device
*dev
, uint32_t stringset
,
541 if (stringset
== ETH_SS_STATS
)
542 memcpy(data
, batadv_counters_strings
,
543 sizeof(batadv_counters_strings
));
546 static void batadv_get_ethtool_stats(struct net_device
*dev
,
547 struct ethtool_stats
*stats
,
550 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
553 for (i
= 0; i
< BATADV_CNT_NUM
; i
++)
554 data
[i
] = batadv_sum_counter(bat_priv
, i
);
557 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
)
559 if (stringset
== ETH_SS_STATS
)
560 return BATADV_CNT_NUM
;