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ipv4: Save nexthop address of LSRR/SSRR option to IPCB.

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We can not update iph->daddr in ip_options_rcv_srr(), It is too early.
When some exception ocurred later (eg. in ip_forward() when goto
sr_failed) we need the ip header be identical to the original one as
ICMP need it.

Add a field 'nexthop' in struct ip_options to save nexthop of LSRR
or SSRR option.

Signed-off-by: Li Wei <lw@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Li Wei
2011-11-22 23:33:10 +00:00
committed by David S. Miller
parent 67c170a24f
commit ac8a48106b
3 changed files with 6 additions and 3 deletions
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net/ipv4/ip_forward.c
+1 -1
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@@ -84,7 +84,7 @@ int ip_forward(struct sk_buff *skb)
rt = skb_rtable(skb);
if (opt->is_strictroute && ip_hdr(skb)->daddr != rt->rt_gateway)
if (opt->is_strictroute && opt->nexthop != rt->rt_gateway)
goto sr_failed;
if (unlikely(skb->len > dst_mtu(&rt->dst) && !skb_is_gso(skb) &&