| Message ID | 1422518943-30637-1-git-send-email-lw@cn.fujitsu.com |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
From: Li Wei <lw@cn.fujitsu.com> Date: Thu, 29 Jan 2015 16:09:03 +0800 > RFC 1191 said, "a host MUST not increase its estimate of the Path > MTU in response to the contents of a Datagram Too Big message." > > Signed-off-by: Li Wei <lw@cn.fujitsu.com> Applied, thank you. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index d58dd0e..52e1f2b 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -966,6 +966,9 @@ static void __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu) if (dst->dev->mtu < mtu) return; + if (rt->rt_pmtu && rt->rt_pmtu < mtu) + return; + if (mtu < ip_rt_min_pmtu) mtu = ip_rt_min_pmtu;
RFC 1191 said, "a host MUST not increase its estimate of the Path MTU in response to the contents of a Datagram Too Big message." Signed-off-by: Li Wei <lw@cn.fujitsu.com> --- net/ipv4/route.c | 3 +++ 1 file changed, 3 insertions(+)