Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

[safe/jmp/linux-2.6] / net / ipv6 / ip6_input.c

diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index f77a601..f171e8d 100644 (file)
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -59,6 +59,7 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
        struct ipv6hdr *hdr;
        u32             pkt_len;
        struct inet6_dev *idev;
+       struct net *net = dev_net(skb->dev);
 
        if (skb->pkt_type == PACKET_OTHERHOST) {
                kfree_skb(skb);
@@ -69,10 +70,11 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
 
        idev = __in6_dev_get(skb->dev);
 
-       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INRECEIVES);
+       IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_INRECEIVES);
 
-       if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) {
-               IP6_INC_STATS_BH(idev, IPSTATS_MIB_INDISCARDS);
+       if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL ||
+           !idev || unlikely(idev->cnf.disable_ipv6)) {
+               IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_INDISCARDS);
                rcu_read_unlock();
                goto out;
        }
@@ -100,6 +102,15 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
        if (hdr->version != 6)
                goto err;
 
+       /*
+        * RFC4291 2.5.3
+        * A packet received on an interface with a destination address
+        * of loopback must be dropped.
+        */
+       if (!(dev->flags & IFF_LOOPBACK) &&
+           ipv6_addr_loopback(&hdr->daddr))
+               goto err;
+
        skb->transport_header = skb->network_header + sizeof(*hdr);
        IP6CB(skb)->nhoff = offsetof(struct ipv6hdr, nexthdr);
 
@@ -108,11 +119,12 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
        /* pkt_len may be zero if Jumbo payload option is present */
        if (pkt_len || hdr->nexthdr != NEXTHDR_HOP) {
                if (pkt_len + sizeof(struct ipv6hdr) > skb->len) {
-                       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INTRUNCATEDPKTS);
+                       IP6_INC_STATS_BH(net,
+                                        idev, IPSTATS_MIB_INTRUNCATEDPKTS);
                        goto drop;
                }
                if (pskb_trim_rcsum(skb, pkt_len + sizeof(struct ipv6hdr))) {
-                       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INHDRERRORS);
+                       IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_INHDRERRORS);
                        goto drop;
                }
                hdr = ipv6_hdr(skb);
@@ -120,7 +132,7 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
 
        if (hdr->nexthdr == NEXTHDR_HOP) {
                if (ipv6_parse_hopopts(skb) < 0) {
-                       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INHDRERRORS);
+                       IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_INHDRERRORS);
                        rcu_read_unlock();
                        return 0;
                }
@@ -131,7 +143,7 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
        return NF_HOOK(PF_INET6, NF_INET_PRE_ROUTING, skb, dev, NULL,
                       ip6_rcv_finish);
 err:
-       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INHDRERRORS);
+       IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_INHDRERRORS);
 drop:
        rcu_read_unlock();
        kfree_skb(skb);
@@ -151,6 +163,7 @@ static int ip6_input_finish(struct sk_buff *skb)
        int nexthdr, raw;
        u8 hash;
        struct inet6_dev *idev;
+       struct net *net = dev_net(skb->dst->dev);
 
        /*
         *      Parse extension headers
@@ -195,24 +208,25 @@ resubmit:
                if (ret > 0)
                        goto resubmit;
                else if (ret == 0)
-                       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INDELIVERS);
+                       IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_INDELIVERS);
        } else {
                if (!raw) {
                        if (xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
-                               IP6_INC_STATS_BH(idev, IPSTATS_MIB_INUNKNOWNPROTOS);
+                               IP6_INC_STATS_BH(net, idev,
+                                                IPSTATS_MIB_INUNKNOWNPROTOS);
                                icmpv6_send(skb, ICMPV6_PARAMPROB,
                                            ICMPV6_UNK_NEXTHDR, nhoff,
                                            skb->dev);
                        }
                } else
-                       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INDELIVERS);
+                       IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_INDELIVERS);
                kfree_skb(skb);
        }
        rcu_read_unlock();
        return 0;
 
 discard:
-       IP6_INC_STATS_BH(idev, IPSTATS_MIB_INDISCARDS);
+       IP6_INC_STATS_BH(net, idev, IPSTATS_MIB_INDISCARDS);
        rcu_read_unlock();
        kfree_skb(skb);
        return 0;
@@ -230,7 +244,8 @@ int ip6_mc_input(struct sk_buff *skb)
        struct ipv6hdr *hdr;
        int deliver;
 
-       IP6_INC_STATS_BH(ip6_dst_idev(skb->dst), IPSTATS_MIB_INMCASTPKTS);
+       IP6_INC_STATS_BH(dev_net(skb->dst->dev),
+                        ip6_dst_idev(skb->dst), IPSTATS_MIB_INMCASTPKTS);
 
        hdr = ipv6_hdr(skb);
        deliver = ipv6_chk_mcast_addr(skb->dev, &hdr->daddr, NULL);
@@ -239,7 +254,8 @@ int ip6_mc_input(struct sk_buff *skb)
        /*
         *      IPv6 multicast router mode is now supported ;)
         */
-       if (ipv6_devconf.mc_forwarding &&
+       if (dev_net(skb->dev)->ipv6.devconf_all->mc_forwarding &&
+           !(ipv6_addr_type(&hdr->daddr) & IPV6_ADDR_LINKLOCAL) &&
            likely(!(IP6CB(skb)->flags & IP6SKB_FORWARDED))) {
                /*
                 * Okay, we try to forward - split and duplicate
@@ -301,7 +317,6 @@ int ip6_mc_input(struct sk_buff *skb)
                }
 
                if (skb2) {
-                       skb2->dev = skb2->dst->dev;
                        ip6_mr_input(skb2);
                }
        }