(usagi-users 03612) Re: IPv6 setsockopt software MTU patch
From: YOSHIFUJI Hideaki / 吉藤英明 <hidden>
Date: 2006-02-19 16:08:21
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
In article [ref] (at Sun, 19 Feb 2006 15:54:13 +0100), hoerdt@clarinet.u-strasbg.fr says:
Yes, Hugo Santos suggested me to use the minimum of both, the new patch is available there : http://clarinet.u-strasbg.fr/~hoerdt/ip6_output.c.softfrag.patch2
Do you mean like this? Signed-off-by: YOSHIFUJI Hideaki <redacted>
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index efa3e72..3264740 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c@@ -494,6 +494,7 @@ static int ip6_fragment(struct sk_buff * struct net_device *dev; struct sk_buff *frag; struct rt6_info *rt = (struct rt6_info*)skb->dst; + struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL; struct ipv6hdr *tmp_hdr; struct frag_hdr *fh; unsigned int mtu, hlen, left, len;
@@ -506,6 +507,8 @@ static int ip6_fragment(struct sk_buff * nexthdr = *prevhdr; mtu = dst_mtu(&rt->u.dst) - hlen - sizeof(struct frag_hdr); + if (np && np->frag_size && np->frag_size < dst_mtu(&rt->u.dst)) + mtu = np->frag_size - hlen - sizeof(struct frag_hdr); if (skb_shinfo(skb)->frag_list) { int first_len = skb_pagelen(skb);
--
YOSHIFUJI Hideaki @ USAGI Project <yoshfuji@linux-ipv6.org>
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