[IPV6]: Try not to send icmp to anycast address.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
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@ -328,8 +328,10 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
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iif = skb->dev->ifindex;
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/*
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* Must not send if we know that source is Anycast also.
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* for now we don't know that.
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* Must not send error if the source does not uniquely
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* identify a single node (RFC2463 Section 2.4).
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* We check unspecified / multicast addresses here,
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* and anycast addresses will be checked later.
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*/
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if ((addr_type == IPV6_ADDR_ANY) || (addr_type & IPV6_ADDR_MULTICAST)) {
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LIMIT_NETDEBUG(KERN_DEBUG "icmpv6_send: addr_any/mcast source\n");
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@ -373,6 +375,16 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
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err = ip6_dst_lookup(sk, &dst, &fl);
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if (err)
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goto out;
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/*
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* We won't send icmp if the destination is known
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* anycast.
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*/
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if (((struct rt6_info *)dst)->rt6i_flags & RTF_ANYCAST) {
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LIMIT_NETDEBUG(KERN_DEBUG "icmpv6_send: acast source\n");
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goto out_dst_release;
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}
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if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
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goto out;
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