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authorJiri Pirko <jiri@resnulli.us>2013-10-19 12:29:15 +0200
committerDavid S. Miller <davem@davemloft.net>2013-10-19 19:20:52 -0400
commite36d3ff91130002c7c2d1d6a55556991da1daecc (patch)
treed92b582ce75873973b4fed7d4b2c1dd5fdf18b82 /net
parentnet: fix cipso packet validation when !NETLABEL (diff)
downloadlinux-dev-e36d3ff91130002c7c2d1d6a55556991da1daecc.tar.xz
linux-dev-e36d3ff91130002c7c2d1d6a55556991da1daecc.zip
udp6: respect IPV6_DONTFRAG sockopt in case there are pending frames
if up->pending != 0 dontfrag is left with default value -1. That causes that application that do: sendto len>mtu flag MSG_MORE sendto len>mtu flag 0 will receive EMSGSIZE errno as the result of the second sendto. This patch fixes it by respecting IPV6_DONTFRAG socket option. introduced by: commit 4b340ae20d0e2366792abe70f46629e576adaf5e "IPv6: Complete IPV6_DONTFRAG support" Signed-off-by: Jiri Pirko <jiri@resnulli.us> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/udp.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 72b7eaaf3ca0..18786098fd41 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1225,9 +1225,6 @@ do_udp_sendmsg:
if (tclass < 0)
tclass = np->tclass;
- if (dontfrag < 0)
- dontfrag = np->dontfrag;
-
if (msg->msg_flags&MSG_CONFIRM)
goto do_confirm;
back_from_confirm:
@@ -1246,6 +1243,8 @@ back_from_confirm:
up->pending = AF_INET6;
do_append_data:
+ if (dontfrag < 0)
+ dontfrag = np->dontfrag;
up->len += ulen;
getfrag = is_udplite ? udplite_getfrag : ip_generic_getfrag;
err = ip6_append_data(sk, getfrag, msg->msg_iov, ulen,