batman-adv: make is_my_mac() check for the current mesh only

On a multi-mesh node (a node running more than one batman-adv
virtual interface) batadv_is_my_mac() has to check MAC
addresses of hard interfaces belonging to the current mesh
only.

Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>

5 files changed, 28 insertions, 23 deletions

diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 0488d70c8c35..fa563e497c48 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -169,7 +169,7 @@ void batadv_mesh_free(struct net_device *soft_iface)
         atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
 }
 
-int batadv_is_my_mac(const uint8_t *addr)
+int batadv_is_my_mac(struct batadv_priv *bat_priv, const uint8_t *addr)
 {
         const struct batadv_hard_iface *hard_iface;
 
@@ -178,6 +178,9 @@ int batadv_is_my_mac(const uint8_t *addr)
                 if (hard_iface->if_status != BATADV_IF_ACTIVE)
                         continue;
 
+                if (hard_iface->soft_iface != bat_priv->soft_iface)
+                        continue;
+
                 if (batadv_compare_eth(hard_iface->net_dev->dev_addr, addr)) {
                         rcu_read_unlock();
                         return 1;
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index ced08b936a96..d40910dfc8ea 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -162,7 +162,7 @@ extern struct workqueue_struct *batadv_event_workqueue;
 
 int batadv_mesh_init(struct net_device *soft_iface);
 void batadv_mesh_free(struct net_device *soft_iface);
-int batadv_is_my_mac(const uint8_t *addr);
+int batadv_is_my_mac(struct batadv_priv *bat_priv, const uint8_t *addr);
 struct batadv_hard_iface *
 batadv_seq_print_text_primary_if_get(struct seq_file *seq);
 int batadv_batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 5ee21cebbbb0..319f2906c71a 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -402,7 +402,7 @@ int batadv_recv_icmp_packet(struct sk_buff *skb,
                 goto out;
 
         /* not for me */
-        if (!batadv_is_my_mac(ethhdr->h_dest))
+        if (!batadv_is_my_mac(bat_priv, ethhdr->h_dest))
                 goto out;
 
         icmp_packet = (struct batadv_icmp_packet_rr *)skb->data;
@@ -416,7 +416,7 @@ int batadv_recv_icmp_packet(struct sk_buff *skb,
         }
 
         /* packet for me */
-        if (batadv_is_my_mac(icmp_packet->dst))
+        if (batadv_is_my_mac(bat_priv, icmp_packet->dst))
                 return batadv_recv_my_icmp_packet(bat_priv, skb, hdr_size);
 
         /* TTL exceeded */
@@ -548,7 +548,8 @@ batadv_find_ifalter_router(struct batadv_orig_node *primary_orig,
         return router;
 }
 
-static int batadv_check_unicast_packet(struct sk_buff *skb, int hdr_size)
+static int batadv_check_unicast_packet(struct batadv_priv *bat_priv,
+                                       struct sk_buff *skb, int hdr_size)
 {
         struct ethhdr *ethhdr;
 
@@ -567,7 +568,7 @@ static int batadv_check_unicast_packet(struct sk_buff *skb, int hdr_size)
                 return -1;
 
         /* not for me */
-        if (!batadv_is_my_mac(ethhdr->h_dest))
+        if (!batadv_is_my_mac(bat_priv, ethhdr->h_dest))
                 return -1;
 
         return 0;
@@ -582,7 +583,7 @@ int batadv_recv_tt_query(struct sk_buff *skb, struct batadv_hard_iface *recv_if)
         char tt_flag;
         size_t packet_size;
 
-        if (batadv_check_unicast_packet(skb, hdr_size) < 0)
+        if (batadv_check_unicast_packet(bat_priv, skb, hdr_size) < 0)
                 return NET_RX_DROP;
 
         /* I could need to modify it */
@@ -614,7 +615,7 @@ int batadv_recv_tt_query(struct sk_buff *skb, struct batadv_hard_iface *recv_if)
         case BATADV_TT_RESPONSE:
                 batadv_inc_counter(bat_priv, BATADV_CNT_TT_RESPONSE_RX);
 
-                if (batadv_is_my_mac(tt_query->dst)) {
+                if (batadv_is_my_mac(bat_priv, tt_query->dst)) {
                         /* packet needs to be linearized to access the TT
                          * changes
                          */
@@ -657,14 +658,15 @@ int batadv_recv_roam_adv(struct sk_buff *skb, struct batadv_hard_iface *recv_if)
         struct batadv_roam_adv_packet *roam_adv_packet;
         struct batadv_orig_node *orig_node;
 
-        if (batadv_check_unicast_packet(skb, sizeof(*roam_adv_packet)) < 0)
+        if (batadv_check_unicast_packet(bat_priv, skb,
+                                        sizeof(*roam_adv_packet)) < 0)
                 goto out;
 
         batadv_inc_counter(bat_priv, BATADV_CNT_TT_ROAM_ADV_RX);
 
         roam_adv_packet = (struct batadv_roam_adv_packet *)skb->data;
 
-        if (!batadv_is_my_mac(roam_adv_packet->dst))
+        if (!batadv_is_my_mac(bat_priv, roam_adv_packet->dst))
                 return batadv_route_unicast_packet(skb, recv_if);
 
         /* check if it is a backbone gateway. we don't accept
@@ -967,7 +969,7 @@ static int batadv_check_unicast_ttvn(struct batadv_priv *bat_priv,
          * last time) the packet had an updated information or not
          */
         curr_ttvn = (uint8_t)atomic_read(&bat_priv->tt.vn);
-        if (!batadv_is_my_mac(unicast_packet->dest)) {
+        if (!batadv_is_my_mac(bat_priv, unicast_packet->dest)) {
                 orig_node = batadv_orig_hash_find(bat_priv,
                                                   unicast_packet->dest);
                 /* if it is not possible to find the orig_node representing the
@@ -1044,14 +1046,14 @@ int batadv_recv_unicast_packet(struct sk_buff *skb,
         if (is4addr)
                 hdr_size = sizeof(*unicast_4addr_packet);
 
-        if (batadv_check_unicast_packet(skb, hdr_size) < 0)
+        if (batadv_check_unicast_packet(bat_priv, skb, hdr_size) < 0)
                 return NET_RX_DROP;
 
         if (!batadv_check_unicast_ttvn(bat_priv, skb))
                 return NET_RX_DROP;
 
         /* packet for me */
-        if (batadv_is_my_mac(unicast_packet->dest)) {
+        if (batadv_is_my_mac(bat_priv, unicast_packet->dest)) {
                 if (is4addr) {
                         batadv_dat_inc_counter(bat_priv,
                                                unicast_4addr_packet->subtype);
@@ -1088,7 +1090,7 @@ int batadv_recv_ucast_frag_packet(struct sk_buff *skb,
         struct sk_buff *new_skb = NULL;
         int ret;
 
-        if (batadv_check_unicast_packet(skb, hdr_size) < 0)
+        if (batadv_check_unicast_packet(bat_priv, skb, hdr_size) < 0)
                 return NET_RX_DROP;
 
         if (!batadv_check_unicast_ttvn(bat_priv, skb))
@@ -1097,7 +1099,7 @@ int batadv_recv_ucast_frag_packet(struct sk_buff *skb,
         unicast_packet = (struct batadv_unicast_frag_packet *)skb->data;
 
         /* packet for me */
-        if (batadv_is_my_mac(unicast_packet->dest)) {
+        if (batadv_is_my_mac(bat_priv, unicast_packet->dest)) {
                 ret = batadv_frag_reassemble_skb(skb, bat_priv, &new_skb);
 
                 if (ret == NET_RX_DROP)
@@ -1151,13 +1153,13 @@ int batadv_recv_bcast_packet(struct sk_buff *skb,
                 goto out;
 
         /* ignore broadcasts sent by myself */
-        if (batadv_is_my_mac(ethhdr->h_source))
+        if (batadv_is_my_mac(bat_priv, ethhdr->h_source))
                 goto out;
 
         bcast_packet = (struct batadv_bcast_packet *)skb->data;
 
         /* ignore broadcasts originated by myself */
-        if (batadv_is_my_mac(bcast_packet->orig))
+        if (batadv_is_my_mac(bat_priv, bcast_packet->orig))
                 goto out;
 
         if (bcast_packet->header.ttl < 2)
@@ -1243,14 +1245,14 @@ int batadv_recv_vis_packet(struct sk_buff *skb,
         ethhdr = (struct ethhdr *)skb_mac_header(skb);
 
         /* not for me */
-        if (!batadv_is_my_mac(ethhdr->h_dest))
+        if (!batadv_is_my_mac(bat_priv, ethhdr->h_dest))
                 return NET_RX_DROP;
 
         /* ignore own packets */
-        if (batadv_is_my_mac(vis_packet->vis_orig))
+        if (batadv_is_my_mac(bat_priv, vis_packet->vis_orig))
                 return NET_RX_DROP;
 
-        if (batadv_is_my_mac(vis_packet->sender_orig))
+        if (batadv_is_my_mac(bat_priv, vis_packet->sender_orig))
                 return NET_RX_DROP;
 
         switch (vis_packet->vis_type) {
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index 98a66a021a60..7abee19567e9 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -1953,7 +1953,7 @@ out:
 bool batadv_send_tt_response(struct batadv_priv *bat_priv,
                              struct batadv_tt_query_packet *tt_request)
 {
-        if (batadv_is_my_mac(tt_request->dst)) {
+        if (batadv_is_my_mac(bat_priv, tt_request->dst)) {
                 /* don't answer backbone gws! */
                 if (batadv_bla_is_backbone_gw_orig(bat_priv, tt_request->src))
                         return true;
diff --git a/net/batman-adv/vis.c b/net/batman-adv/vis.c
index c053244b97bd..6a1e646be96d 100644
--- a/net/batman-adv/vis.c
+++ b/net/batman-adv/vis.c
@@ -477,7 +477,7 @@ void batadv_receive_client_update_packet(struct batadv_priv *bat_priv,
 
         /* Are we the target for this VIS packet? */
         if (vis_server == BATADV_VIS_TYPE_SERVER_SYNC   &&
-            batadv_is_my_mac(vis_packet->target_orig))
+            batadv_is_my_mac(bat_priv, vis_packet->target_orig))
                 are_target = 1;
 
         spin_lock_bh(&bat_priv->vis.hash_lock);
@@ -496,7 +496,7 @@ void batadv_receive_client_update_packet(struct batadv_priv *bat_priv,
                 batadv_send_list_add(bat_priv, info);
 
                 /* ... we're not the recipient (and thus need to forward). */
-        } else if (!batadv_is_my_mac(packet->target_orig)) {
+        } else if (!batadv_is_my_mac(bat_priv, packet->target_orig)) {
                 batadv_send_list_add(bat_priv, info);
         }