#include "hash.h"
#include "soft-interface.h"
#include "hard-interface.h"
-#include "device.h"
+#include "icmp_socket.h"
#include "translation-table.h"
#include "originator.h"
#include "types.h"
#include "vis.h"
#include "aggregation.h"
-DECLARE_WAIT_QUEUE_HEAD(thread_wait);
+static DECLARE_WAIT_QUEUE_HEAD(thread_wait);
void slide_own_bcast_window(struct batman_if *batman_if)
{
struct neigh_node *neigh_node,
unsigned char *hna_buff, int hna_buff_len)
{
+ /* FIXME: each orig_node->batman_if will be attached to a softif */
+ struct bat_priv *bat_priv = netdev_priv(soft_device);
+
/* route deleted */
if ((orig_node->router != NULL) && (neigh_node == NULL)) {
- bat_dbg(DBG_ROUTES, "Deleting route towards: %pM\n",
+ bat_dbg(DBG_ROUTES, bat_priv, "Deleting route towards: %pM\n",
orig_node->orig);
hna_global_del_orig(orig_node, "originator timed out");
/* route added */
} else if ((orig_node->router == NULL) && (neigh_node != NULL)) {
- bat_dbg(DBG_ROUTES,
+ bat_dbg(DBG_ROUTES, bat_priv,
"Adding route towards: %pM (via %pM)\n",
orig_node->orig, neigh_node->addr);
hna_global_add_orig(orig_node, hna_buff, hna_buff_len);
/* route changed */
} else {
- bat_dbg(DBG_ROUTES,
+ bat_dbg(DBG_ROUTES, bat_priv,
"Changing route towards: %pM "
"(now via %pM - was via %pM)\n",
orig_node->orig, neigh_node->addr,
update_HNA(orig_node, hna_buff, hna_buff_len);
}
-static int isBidirectionalNeigh(struct orig_node *orig_node,
+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)
{
+ /* FIXME: each orig_node->batman_if will be attached to a softif */
+ struct bat_priv *bat_priv = netdev_priv(soft_device);
struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
unsigned char total_count;
orig_neigh_node->tq_asym_penalty) /
(TQ_MAX_VALUE * TQ_MAX_VALUE));
- bat_dbg(DBG_BATMAN,
+ bat_dbg(DBG_BATMAN, bat_priv,
"bidirectional: "
"orig = %-15pM neigh = %-15pM => own_bcast = %2i, "
"real recv = %2i, local tq: %3i, asym_penalty: %3i, "
unsigned char *hna_buff, int hna_buff_len,
char is_duplicate)
{
+ /* FIXME: get bat_priv */
+ struct bat_priv *bat_priv = netdev_priv(soft_device);
struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
int tmp_hna_buff_len;
- bat_dbg(DBG_BATMAN, "update_originator(): "
+ 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 (!neigh_node)
return;
} else
- bat_dbg(DBG_BATMAN,
+ bat_dbg(DBG_BATMAN, bat_priv,
"Updating existing last-hop neighbor of originator\n");
orig_node->flags = batman_packet->flags;
* 0 if the packet is to be accepted
* 1 if the packet is to be ignored.
*/
-static int window_protected(int16_t seq_num_diff,
+static int window_protected(int32_t seq_num_diff,
unsigned long *last_reset)
{
+ /* FIXME: each orig_node->batman_if will be attached to a softif */
+ struct bat_priv *bat_priv = netdev_priv(soft_device);
+
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_dbg(DBG_BATMAN, bat_priv,
"old packet received, start protection\n");
return 0;
struct batman_packet *batman_packet,
struct batman_if *if_incoming)
{
+ /* FIXME: each orig_node->batman_if will be attached to a softif */
+ struct bat_priv *bat_priv = netdev_priv(soft_device);
struct orig_node *orig_node;
struct neigh_node *tmp_neigh_node;
char is_duplicate = 0;
- int16_t seq_diff;
+ int32_t seq_diff;
int need_update = 0;
int set_mark;
}
if (need_update) {
- bat_dbg(DBG_BATMAN, "updating last_seqno: old %d, new %d\n",
+ 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 == NULL)
+ 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 == NULL) {
+ 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)
{
+ /* FIXME: each orig_node->batman_if will be attached to a softif */
+ struct bat_priv *bat_priv = netdev_priv(soft_device);
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;
- unsigned short if_incoming_seqno;
+ uint32_t if_incoming_seqno;
/* Silently drop when the batman packet is actually not a
* correct packet.
is_single_hop_neigh = (compare_orig(ethhdr->h_source,
batman_packet->orig) ? 1 : 0);
- bat_dbg(DBG_BATMAN, "Received BATMAN packet via NB: %pM, IF: %s [%s] "
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Received BATMAN packet via NB: %pM, IF: %s [%s] "
"(from OG: %pM, via prev OG: %pM, seqno %d, tq %d, "
"TTL %d, V %d, IDF %d)\n",
ethhdr->h_source, if_incoming->dev, if_incoming->addr_str,
batman_if->net_dev->dev_addr))
is_my_oldorig = 1;
- if (compare_orig(ethhdr->h_source, broadcastAddr))
+ if (compare_orig(ethhdr->h_source, broadcast_addr))
is_broadcast = 1;
}
if (batman_packet->version != COMPAT_VERSION) {
- bat_dbg(DBG_BATMAN,
+ 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_dbg(DBG_BATMAN, bat_priv,
"Drop packet: received my own broadcast (sender: %pM"
")\n",
ethhdr->h_source);
}
if (is_broadcast) {
- bat_dbg(DBG_BATMAN, "Drop packet: "
+ bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
"ignoring all packets with broadcast source addr (sender: %pM"
")\n", ethhdr->h_source);
return;
bit_packet_count(word);
}
- bat_dbg(DBG_BATMAN, "Drop packet: "
+ 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_dbg(DBG_BATMAN, bat_priv,
"Drop packet: ignoring all rebroadcast echos (sender: "
"%pM)\n", ethhdr->h_source);
return;
is_duplicate = count_real_packets(ethhdr, batman_packet, if_incoming);
if (is_duplicate == -1) {
- bat_dbg(DBG_BATMAN,
+ 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_dbg(DBG_BATMAN, bat_priv,
"Drop packet: originator packet with tq equal 0\n");
return;
}
!(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_dbg(DBG_BATMAN, bat_priv,
"Drop packet: ignoring all rebroadcast packets that "
"may make me loop (sender: %pM)\n", ethhdr->h_source);
return;
* don't route towards it */
if (!is_single_hop_neigh &&
(orig_neigh_node->router == NULL)) {
- bat_dbg(DBG_BATMAN, "Drop packet: OGM via unknown neighbor!\n");
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Drop packet: OGM via unknown neighbor!\n");
return;
}
- is_bidirectional = isBidirectionalNeigh(orig_node, orig_neigh_node,
+ 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
update_orig(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) {
schedule_forward_packet(orig_node, ethhdr, batman_packet,
1, hna_buff_len, if_incoming);
- bat_dbg(DBG_BATMAN, "Forwarding packet: "
+ 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_dbg(DBG_BATMAN, bat_priv,
"Drop packet: not received via bidirectional link\n");
return;
}
if (is_duplicate) {
- bat_dbg(DBG_BATMAN, "Drop packet: duplicate packet received\n");
+ bat_dbg(DBG_BATMAN, bat_priv,
+ "Drop packet: duplicate packet received\n");
return;
}
- bat_dbg(DBG_BATMAN,
+ 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);
return NET_RX_SUCCESS;
}
-static int recv_my_icmp_packet(struct sk_buff *skb)
+static int recv_my_icmp_packet(struct sk_buff *skb, size_t icmp_len)
{
struct orig_node *orig_node;
- struct icmp_packet *icmp_packet;
+ struct icmp_packet_rr *icmp_packet;
struct ethhdr *ethhdr;
struct sk_buff *skb_old;
struct batman_if *batman_if;
unsigned long flags;
uint8_t dstaddr[ETH_ALEN];
- icmp_packet = (struct icmp_packet *)skb->data;
+ 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_device_receive_packet(icmp_packet);
+ bat_socket_receive_packet(icmp_packet, icmp_len);
return NET_RX_DROP;
}
/* create a copy of the skb, if needed, to modify it. */
skb_old = NULL;
- if (!skb_clone_writable(skb, sizeof(struct icmp_packet))) {
+ if (!skb_clone_writable(skb, icmp_len)) {
skb_old = skb;
skb = skb_copy(skb, GFP_ATOMIC);
if (!skb)
return NET_RX_DROP;
-
- icmp_packet = (struct icmp_packet *)skb->data;
+ icmp_packet = (struct icmp_packet_rr *)skb->data;
ethhdr = (struct ethhdr *)skb_mac_header(skb);
kfree_skb(skb_old);
}
return ret;
}
-static int recv_icmp_ttl_exceeded(struct sk_buff *skb)
+static int recv_icmp_ttl_exceeded(struct sk_buff *skb, size_t icmp_len)
{
struct orig_node *orig_node;
struct icmp_packet *icmp_packet;
/* send TTL exceeded if packet is an echo request (traceroute) */
if (icmp_packet->msg_type != ECHO_REQUEST) {
- printk(KERN_WARNING "batman-adv:"
- "Warning - can't forward icmp packet from %pM to %pM: "
- "ttl exceeded\n",
- icmp_packet->orig, icmp_packet->dst);
+ pr_warning("Warning - can't forward icmp packet from %pM to "
+ "%pM: ttl exceeded\n", icmp_packet->orig,
+ icmp_packet->dst);
return NET_RX_DROP;
}
spin_unlock_irqrestore(&orig_hash_lock, flags);
/* create a copy of the skb, if needed, to modify it. */
- if (!skb_clone_writable(skb, sizeof(struct icmp_packet))) {
+ if (!skb_clone_writable(skb, icmp_len)) {
skb_old = skb;
skb = skb_copy(skb, GFP_ATOMIC);
if (!skb)
int recv_icmp_packet(struct sk_buff *skb)
{
- struct icmp_packet *icmp_packet;
+ struct icmp_packet_rr *icmp_packet;
struct ethhdr *ethhdr;
struct orig_node *orig_node;
struct sk_buff *skb_old;
unsigned long flags;
uint8_t dstaddr[ETH_ALEN];
+ /**
+ * we truncate all incoming icmp packets if they don't match our size
+ */
+ if (skb_headlen(skb) >= sizeof(struct icmp_packet_rr))
+ hdr_size = sizeof(struct icmp_packet_rr);
+
/* drop packet if it has not necessary minimum size */
if (skb_headlen(skb) < hdr_size)
return NET_RX_DROP;
if (!is_my_mac(ethhdr->h_dest))
return NET_RX_DROP;
- icmp_packet = (struct icmp_packet *)skb->data;
+ 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(skb);
+ return recv_my_icmp_packet(skb, hdr_size);
/* TTL exceeded */
if (icmp_packet->ttl < 2)
- return recv_icmp_ttl_exceeded(skb);
+ return recv_icmp_ttl_exceeded(skb, hdr_size);
ret = NET_RX_DROP;
spin_unlock_irqrestore(&orig_hash_lock, flags);
/* create a copy of the skb, if needed, to modify it. */
- if (!skb_clone_writable(skb, sizeof(struct icmp_packet))) {
+ if (!skb_clone_writable(skb, hdr_size)) {
skb_old = skb;
skb = skb_copy(skb, GFP_ATOMIC);
if (!skb)
return NET_RX_DROP;
- icmp_packet = (struct icmp_packet *)skb->data;
+ icmp_packet = (struct icmp_packet_rr *)skb->data;
ethhdr = (struct ethhdr *)skb_mac_header(skb);
kfree_skb(skb_old);
}
return ret;
}
-int recv_unicast_packet(struct sk_buff *skb)
+/* find a suitable router for this originator, and use
+ * bonding if possible. */
+struct neigh_node *find_router(struct orig_node *orig_node,
+ struct batman_if *recv_if)
+{
+ /* FIXME: each orig_node->batman_if will be attached to a softif */
+ struct bat_priv *bat_priv = netdev_priv(soft_device);
+ 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_enabled);
+ if (!bonding_enabled && (recv_if == NULL))
+ 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(orig_hash,
+ 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;
+}
+
+int recv_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if)
{
struct unicast_packet *unicast_packet;
struct orig_node *orig_node;
+ struct neigh_node *router;
struct ethhdr *ethhdr;
struct batman_if *batman_if;
struct sk_buff *skb_old;
uint8_t dstaddr[ETH_ALEN];
int hdr_size = sizeof(struct unicast_packet);
- int ret;
unsigned long flags;
/* drop packet if it has not necessary minimum size */
/* TTL exceeded */
if (unicast_packet->ttl < 2) {
- printk(KERN_WARNING "batman-adv:Warning - "
- "can't forward unicast packet from %pM to %pM: "
- "ttl exceeded\n",
- ethhdr->h_source, unicast_packet->dest);
+ pr_warning("Warning - can't forward unicast packet from %pM to "
+ "%pM: ttl exceeded\n", ethhdr->h_source,
+ unicast_packet->dest);
return NET_RX_DROP;
}
- ret = NET_RX_DROP;
/* get routing information */
spin_lock_irqsave(&orig_hash_lock, flags);
orig_node = ((struct orig_node *)
hash_find(orig_hash, unicast_packet->dest));
- if ((orig_node != NULL) &&
- (orig_node->router != NULL)) {
+ router = find_router(orig_node, recv_if);
- /* 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);
+ if (!router) {
spin_unlock_irqrestore(&orig_hash_lock, flags);
+ return NET_RX_DROP;
+ }
- /* create a copy of the skb, if needed, to modify it. */
- if (!skb_clone_writable(skb, sizeof(struct unicast_packet))) {
- skb_old = skb;
- skb = skb_copy(skb, GFP_ATOMIC);
- if (!skb)
- return NET_RX_DROP;
- unicast_packet = (struct unicast_packet *)skb->data;
- ethhdr = (struct ethhdr *)skb_mac_header(skb);
- kfree_skb(skb_old);
- }
- /* decrement ttl */
- unicast_packet->ttl--;
+ /* don't lock while sending the packets ... we therefore
+ * copy the required data before sending */
- /* route it */
- send_skb_packet(skb, batman_if, dstaddr);
- ret = NET_RX_SUCCESS;
+ batman_if = router->if_incoming;
+ memcpy(dstaddr, router->addr, ETH_ALEN);
- } else
- spin_unlock_irqrestore(&orig_hash_lock, flags);
+ spin_unlock_irqrestore(&orig_hash_lock, flags);
- return ret;
+ /* create a copy of the skb, if needed, to modify it. */
+ if (!skb_clone_writable(skb, sizeof(struct unicast_packet))) {
+ skb_old = skb;
+ skb = skb_copy(skb, GFP_ATOMIC);
+ if (!skb)
+ return NET_RX_DROP;
+ unicast_packet = (struct unicast_packet *) skb->data;
+ ethhdr = (struct ethhdr *)skb_mac_header(skb);
+ kfree_skb(skb_old);
+ }
+
+ /* decrement ttl */
+ unicast_packet->ttl--;
+
+ /* route it */
+ send_skb_packet(skb, batman_if, dstaddr);
+
+ return NET_RX_SUCCESS;
}
int recv_bcast_packet(struct sk_buff *skb)
struct bcast_packet *bcast_packet;
struct ethhdr *ethhdr;
int hdr_size = sizeof(struct bcast_packet);
- int16_t seq_diff;
+ int32_t seq_diff;
unsigned long flags;
/* drop packet if it has not necessary minimum size */
if (is_my_mac(bcast_packet->orig))
return NET_RX_DROP;
+ if (bcast_packet->ttl < 2)
+ return NET_RX_DROP;
+
spin_lock_irqsave(&orig_hash_lock, flags);
orig_node = ((struct orig_node *)
hash_find(orig_hash, bcast_packet->orig));
/* check whether the packet is a duplicate */
if (get_bit_status(orig_node->bcast_bits,
orig_node->last_bcast_seqno,
- ntohs(bcast_packet->seqno))) {
+ ntohl(bcast_packet->seqno))) {
spin_unlock_irqrestore(&orig_hash_lock, flags);
return NET_RX_DROP;
}
- seq_diff = ntohs(bcast_packet->seqno) - orig_node->last_bcast_seqno;
+ 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(seq_diff, &orig_node->bcast_seqno_reset)) {
/* mark broadcast in flood history, update window position
* if required. */
if (bit_get_packet(orig_node->bcast_bits, seq_diff, 1))
- orig_node->last_bcast_seqno = ntohs(bcast_packet->seqno);
+ orig_node->last_bcast_seqno = ntohl(bcast_packet->seqno);
spin_unlock_irqrestore(&orig_hash_lock, flags);
/* rebroadcast packet */
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blobdiff