From: jamal <hadi@cyberus.ca>
To: David Miller <davem@davemloft.net>
Cc: herbert@gondor.apana.org.au, netdev@vger.kernel.org
Subject: [RFC][IPSEC]: tunnel mode processing
Date: Thu, 31 Aug 2006 20:55:27 -0400 [thread overview]
Message-ID: <1157072127.5057.39.camel@jzny2> (raw)
At the moment transport mode processing is not dependent on skb->dst
being passed. Tunnel mode derives the ip->id and ttl from it. More like
computes ip->id.
I am trying to generate traffic via pktgen and it would be nice if i
could get the same behavior on tunnel mode as in transport mode. I dont
think it matters what the values of those two fields are.
Would it be reasonable to do a check so that incase a skb->dst doesnt
exist, the inner headers values can be used i.e something along
xfrm4_tunnel_output()::
----
top_iph->frag_off = (flags & XFRM_STATE_NOPMTUDISC) ?
0 : (iph->frag_off & htons(IP_DF));
if (dst) {
if (!top_iph->frag_off)
__ip_select_ident(top_iph, dst->child, 0);
top_iph->ttl = dst_metric(dst->child, RTAX_HOPLIMIT);
} else {
top_iph->id = iph->id;
top_iph->ttl = iph->ttl;
}
----
cheers,
jamal
next reply other threads:[~2006-09-01 0:55 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-01 0:55 jamal [this message]
2006-09-01 4:07 ` [RFC][IPSEC]: tunnel mode processing Herbert Xu
2006-09-01 12:17 ` jamal
2006-09-01 12:22 ` Herbert Xu
2006-09-01 12:56 ` jamal
2006-09-01 13:04 ` Herbert Xu
2006-09-01 13:12 ` jamal
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