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Diffstat (limited to 'net/batman-adv/multicast.c')
-rw-r--r--net/batman-adv/multicast.c62
1 files changed, 44 insertions, 18 deletions
diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c
index bdc4a1fba1c6..9af99c39b9fd 100644
--- a/net/batman-adv/multicast.c
+++ b/net/batman-adv/multicast.c
@@ -51,6 +51,7 @@
#include <uapi/linux/batadv_packet.h>
#include <uapi/linux/batman_adv.h>
+#include "bridge_loop_avoidance.h"
#include "hard-interface.h"
#include "hash.h"
#include "log.h"
@@ -207,7 +208,7 @@ static u8 batadv_mcast_mla_rtr_flags_bridge_get(struct batadv_priv *bat_priv,
return BATADV_MCAST_WANT_NO_RTR4 | BATADV_MCAST_WANT_NO_RTR6;
/* TODO: ask the bridge if a multicast router is present (the bridge
- * is capable of performing proper RFC4286 multicast multicast router
+ * is capable of performing proper RFC4286 multicast router
* discovery) instead of searching for a ff02::2 listener here
*/
ret = br_multicast_list_adjacent(dev, &bridge_mcast_list);
@@ -220,7 +221,7 @@ static u8 batadv_mcast_mla_rtr_flags_bridge_get(struct batadv_priv *bat_priv,
* address here, only IPv6 ones
*/
if (br_ip_entry->addr.proto == htons(ETH_P_IPV6) &&
- ipv6_addr_is_ll_all_routers(&br_ip_entry->addr.u.ip6))
+ ipv6_addr_is_ll_all_routers(&br_ip_entry->addr.dst.ip6))
flags &= ~BATADV_MCAST_WANT_NO_RTR6;
list_del(&br_ip_entry->list);
@@ -561,10 +562,10 @@ out:
static void batadv_mcast_mla_br_addr_cpy(char *dst, const struct br_ip *src)
{
if (src->proto == htons(ETH_P_IP))
- ip_eth_mc_map(src->u.ip4, dst);
+ ip_eth_mc_map(src->dst.ip4, dst);
#if IS_ENABLED(CONFIG_IPV6)
else if (src->proto == htons(ETH_P_IPV6))
- ipv6_eth_mc_map(&src->u.ip6, dst);
+ ipv6_eth_mc_map(&src->dst.ip6, dst);
#endif
else
eth_zero_addr(dst);
@@ -608,11 +609,11 @@ static int batadv_mcast_mla_bridge_get(struct net_device *dev,
continue;
if (tvlv_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES &&
- ipv4_is_local_multicast(br_ip_entry->addr.u.ip4))
+ ipv4_is_local_multicast(br_ip_entry->addr.dst.ip4))
continue;
if (!(tvlv_flags & BATADV_MCAST_WANT_NO_RTR4) &&
- !ipv4_is_local_multicast(br_ip_entry->addr.u.ip4))
+ !ipv4_is_local_multicast(br_ip_entry->addr.dst.ip4))
continue;
}
@@ -622,11 +623,11 @@ static int batadv_mcast_mla_bridge_get(struct net_device *dev,
continue;
if (tvlv_flags & BATADV_MCAST_WANT_ALL_UNSNOOPABLES &&
- ipv6_addr_is_ll_all_nodes(&br_ip_entry->addr.u.ip6))
+ ipv6_addr_is_ll_all_nodes(&br_ip_entry->addr.dst.ip6))
continue;
if (!(tvlv_flags & BATADV_MCAST_WANT_NO_RTR6) &&
- IPV6_ADDR_MC_SCOPE(&br_ip_entry->addr.u.ip6) >
+ IPV6_ADDR_MC_SCOPE(&br_ip_entry->addr.dst.ip6) >
IPV6_ADDR_SCOPE_LINKLOCAL)
continue;
}
@@ -1435,6 +1436,35 @@ batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb,
}
/**
+ * batadv_mcast_forw_send_orig() - send a multicast packet to an originator
+ * @bat_priv: the bat priv with all the soft interface information
+ * @skb: the multicast packet to send
+ * @vid: the vlan identifier
+ * @orig_node: the originator to send the packet to
+ *
+ * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise.
+ */
+int batadv_mcast_forw_send_orig(struct batadv_priv *bat_priv,
+ struct sk_buff *skb,
+ unsigned short vid,
+ struct batadv_orig_node *orig_node)
+{
+ /* Avoid sending multicast-in-unicast packets to other BLA
+ * gateways - they already got the frame from the LAN side
+ * we share with them.
+ * TODO: Refactor to take BLA into account earlier, to avoid
+ * reducing the mcast_fanout count.
+ */
+ if (batadv_bla_is_backbone_gw_orig(bat_priv, orig_node->orig, vid)) {
+ dev_kfree_skb(skb);
+ return NET_XMIT_SUCCESS;
+ }
+
+ return batadv_send_skb_unicast(bat_priv, skb, BATADV_UNICAST, 0,
+ orig_node, vid);
+}
+
+/**
* batadv_mcast_forw_tt() - forwards a packet to multicast listeners
* @bat_priv: the bat priv with all the soft interface information
* @skb: the multicast packet to transmit
@@ -1471,8 +1501,8 @@ batadv_mcast_forw_tt(struct batadv_priv *bat_priv, struct sk_buff *skb,
break;
}
- batadv_send_skb_unicast(bat_priv, newskb, BATADV_UNICAST, 0,
- orig_entry->orig_node, vid);
+ batadv_mcast_forw_send_orig(bat_priv, newskb, vid,
+ orig_entry->orig_node);
}
rcu_read_unlock();
@@ -1513,8 +1543,7 @@ batadv_mcast_forw_want_all_ipv4(struct batadv_priv *bat_priv,
break;
}
- batadv_send_skb_unicast(bat_priv, newskb, BATADV_UNICAST, 0,
- orig_node, vid);
+ batadv_mcast_forw_send_orig(bat_priv, newskb, vid, orig_node);
}
rcu_read_unlock();
return ret;
@@ -1551,8 +1580,7 @@ batadv_mcast_forw_want_all_ipv6(struct batadv_priv *bat_priv,
break;
}
- batadv_send_skb_unicast(bat_priv, newskb, BATADV_UNICAST, 0,
- orig_node, vid);
+ batadv_mcast_forw_send_orig(bat_priv, newskb, vid, orig_node);
}
rcu_read_unlock();
return ret;
@@ -1618,8 +1646,7 @@ batadv_mcast_forw_want_all_rtr4(struct batadv_priv *bat_priv,
break;
}
- batadv_send_skb_unicast(bat_priv, newskb, BATADV_UNICAST, 0,
- orig_node, vid);
+ batadv_mcast_forw_send_orig(bat_priv, newskb, vid, orig_node);
}
rcu_read_unlock();
return ret;
@@ -1656,8 +1683,7 @@ batadv_mcast_forw_want_all_rtr6(struct batadv_priv *bat_priv,
break;
}
- batadv_send_skb_unicast(bat_priv, newskb, BATADV_UNICAST, 0,
- orig_node, vid);
+ batadv_mcast_forw_send_orig(bat_priv, newskb, vid, orig_node);
}
rcu_read_unlock();
return ret;