[IPV6] MCAST: Use standard path for sending MLD/MLDv2 messages.

This is changing the paths for sending MLD/MLDv2 messages
from dev_queue_xmit() to standard dst_output().

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>

diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 8ce894d..a373b8e 100644 (file)
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -1433,25 +1433,6 @@ static struct sk_buff *mld_newpack(struct net_device *dev, int size)
        return skb;
 }
 
-static inline int mld_dev_queue_xmit2(struct sk_buff *skb)
-{
-       struct net_device *dev = skb->dev;
-       unsigned char ha[MAX_ADDR_LEN];
-
-       ndisc_mc_map(&ipv6_hdr(skb)->daddr, ha, dev, 1);
-       if (dev_hard_header(skb, dev, ETH_P_IPV6, ha, NULL, skb->len) < 0) {
-               kfree_skb(skb);
-               return -EINVAL;
-       }
-       return dev_queue_xmit(skb);
-}
-
-static inline int mld_dev_queue_xmit(struct sk_buff *skb)
-{
-       return NF_HOOK(PF_INET6, NF_INET_POST_ROUTING, skb, NULL, skb->dev,
-                      mld_dev_queue_xmit2);
-}
-
 static void mld_sendpack(struct sk_buff *skb)
 {
        struct ipv6hdr *pip6 = ipv6_hdr(skb);
@@ -1460,6 +1441,7 @@ static void mld_sendpack(struct sk_buff *skb)
        int payload_len, mldlen;
        struct inet6_dev *idev = in6_dev_get(skb->dev);
        int err;
+       struct flowi fl;
 
        IP6_INC_STATS(idev, IPSTATS_MIB_OUTREQUESTS);
        payload_len = (skb->tail - skb->network_header) - sizeof(*pip6);
@@ -1469,8 +1451,25 @@ static void mld_sendpack(struct sk_buff *skb)
        pmr->csum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
                IPPROTO_ICMPV6, csum_partial(skb_transport_header(skb),
                                             mldlen, 0));
+
+       skb->dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
+
+       if (!skb->dst) {
+               err = -ENOMEM;
+               goto err_out;
+       }
+
+       icmpv6_flow_init(igmp6_socket->sk, &fl, ICMPV6_MLD2_REPORT,
+                        &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
+                        skb->dev->ifindex);
+
+       err = xfrm_lookup(&skb->dst, &fl, NULL, 0);
+       if (err)
+               goto err_out;
+
        err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
-               mld_dev_queue_xmit);
+                     dst_output);
+out:
        if (!err) {
                ICMP6MSGOUT_INC_STATS_BH(idev, ICMPV6_MLD2_REPORT);
                ICMP6_INC_STATS_BH(idev, ICMP6_MIB_OUTMSGS);
@@ -1480,6 +1479,11 @@ static void mld_sendpack(struct sk_buff *skb)
 
        if (likely(idev != NULL))
                in6_dev_put(idev);
+       return;
+
+err_out:
+       kfree_skb(skb);
+       goto out;
 }
 
 static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
@@ -1761,6 +1765,7 @@ static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
        u8 ra[8] = { IPPROTO_ICMPV6, 0,
                     IPV6_TLV_ROUTERALERT, 2, 0, 0,
                     IPV6_TLV_PADN, 0 };
+       struct flowi fl;
 
        rcu_read_lock();
        IP6_INC_STATS(__in6_dev_get(dev),
@@ -1813,8 +1818,23 @@ static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
 
        idev = in6_dev_get(skb->dev);
 
+       skb->dst = icmp6_dst_alloc(skb->dev, NULL, &ipv6_hdr(skb)->daddr);
+       if (!skb->dst) {
+               err = -ENOMEM;
+               goto err_out;
+       }
+
+       icmpv6_flow_init(igmp6_socket->sk, &fl, type,
+                        &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
+                        skb->dev->ifindex);
+
+       err = xfrm_lookup(&skb->dst, &fl, NULL, 0);
+       if (err)
+               goto err_out;
+
        err = NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dev,
-               mld_dev_queue_xmit);
+                     dst_output);
+out:
        if (!err) {
                ICMP6MSGOUT_INC_STATS(idev, type);
                ICMP6_INC_STATS(idev, ICMP6_MIB_OUTMSGS);
@@ -1825,6 +1845,10 @@ static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
        if (likely(idev != NULL))
                in6_dev_put(idev);
        return;
+
+err_out:
+       kfree_skb(skb);
+       goto out;
 }
 
 static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,