Hi Kevin On 2013年09月25日 02:52, Kevin Wilson wrote:
Hi, I am looking at this patch: http://lists.openwall.net/netdev/2007/08/24/29 and I cannot understand it. Can somebody please try to explain ? more specifically: Can somebody please give an example of some setup of IPsec tunnel where the ip_rt_send_redirect() method should not be called when the skb->sp is not NULL ?
+ if (rt->rt_flags&RTCF_DOREDIRECT && !opt->srr && !skb->sp) ^^^^^^^ If IPsec policy is not enabled for a specific flow that this skb matches, skb->sp is NULL.
(in other words, why if the SKB is and IPsec SKB, we should not send a redirect in such a case while forwarding a packet; note I am talking about IPv4)
Note that the check for skb->sp was changed in recent kernels to skb_sec_path(skb), but it is essentially the same.
Regards, Kevin
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