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| author | YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> | 2005-12-21 22:57:06 +0900 |
|---|---|---|
| committer | YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> | 2005-12-21 22:57:06 +0900 |
| commit | 8de3351e6e0a1081fbf6864ae37839e327699a08 (patch) | |
| tree | 83f2a001101dee12de37542f554c255cd5dbf18e /net/ipv6/icmp.c | |
| parent | 58c4fb86eabcbc385d954843a635b7f4327be6b0 (diff) | |
| download | linux-8de3351e6e0a1081fbf6864ae37839e327699a08.tar.gz linux-8de3351e6e0a1081fbf6864ae37839e327699a08.tar.bz2 linux-8de3351e6e0a1081fbf6864ae37839e327699a08.zip | |
[IPV6]: Try not to send icmp to anycast address.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Diffstat (limited to 'net/ipv6/icmp.c')
| -rw-r--r-- | net/ipv6/icmp.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index 34a332225c17..6ec6a2b549bb 100644 --- a/net/ipv6/icmp.c +++ b/net/ipv6/icmp.c @@ -328,8 +328,10 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info, iif = skb->dev->ifindex; /* - * Must not send if we know that source is Anycast also. - * for now we don't know that. + * Must not send error if the source does not uniquely + * identify a single node (RFC2463 Section 2.4). + * We check unspecified / multicast addresses here, + * and anycast addresses will be checked later. */ if ((addr_type == IPV6_ADDR_ANY) || (addr_type & IPV6_ADDR_MULTICAST)) { LIMIT_NETDEBUG(KERN_DEBUG "icmpv6_send: addr_any/mcast source\n"); @@ -373,6 +375,16 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info, err = ip6_dst_lookup(sk, &dst, &fl); if (err) goto out; + + /* + * We won't send icmp if the destination is known + * anycast. + */ + if (((struct rt6_info *)dst)->rt6i_flags & RTF_ANYCAST) { + LIMIT_NETDEBUG(KERN_DEBUG "icmpv6_send: acast source\n"); + goto out_dst_release; + } + if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) goto out; |