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authorYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>2005-12-21 08:57:06 -0500
committerYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>2005-12-21 08:57:06 -0500
commit8de3351e6e0a1081fbf6864ae37839e327699a08 (patch)
tree83f2a001101dee12de37542f554c255cd5dbf18e /net/ipv6/icmp.c
parent58c4fb86eabcbc385d954843a635b7f4327be6b0 (diff)
[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.c16
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,
328 iif = skb->dev->ifindex; 328 iif = skb->dev->ifindex;
329 329
330 /* 330 /*
331 * Must not send if we know that source is Anycast also. 331 * Must not send error if the source does not uniquely
332 * for now we don't know that. 332 * identify a single node (RFC2463 Section 2.4).
333 * We check unspecified / multicast addresses here,
334 * and anycast addresses will be checked later.
333 */ 335 */
334 if ((addr_type == IPV6_ADDR_ANY) || (addr_type & IPV6_ADDR_MULTICAST)) { 336 if ((addr_type == IPV6_ADDR_ANY) || (addr_type & IPV6_ADDR_MULTICAST)) {
335 LIMIT_NETDEBUG(KERN_DEBUG "icmpv6_send: addr_any/mcast source\n"); 337 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,
373 err = ip6_dst_lookup(sk, &dst, &fl); 375 err = ip6_dst_lookup(sk, &dst, &fl);
374 if (err) 376 if (err)
375 goto out; 377 goto out;
378
379 /*
380 * We won't send icmp if the destination is known
381 * anycast.
382 */
383 if (((struct rt6_info *)dst)->rt6i_flags & RTF_ANYCAST) {
384 LIMIT_NETDEBUG(KERN_DEBUG "icmpv6_send: acast source\n");
385 goto out_dst_release;
386 }
387
376 if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) 388 if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
377 goto out; 389 goto out;
378 390