netdev - [PATCH 3/3] [IPV6]: Do not change protocol for UDPv6 sockets with pending sent data.

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Date:	Wed,  4 Jun 2008 15:49:08 +0400
From:	"Denis V. Lunev" <den@...nvz.org>
To:	yoshfuji@...ux-ipv6.org
Cc:	davem@...emloft.net, netdev@...r.kernel.org, kaber@...sh.net,
	"Denis V. Lunev" <den@...nvz.org>
Subject: [PATCH 3/3] [IPV6]: Do not change protocol for UDPv6 sockets with pending sent data.

Signed-off-by: Denis V. Lunev <den@...nvz.org>
---
 net/ipv6/ipv6_sockglue.c |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 763230e..3152aaa 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -164,9 +164,14 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
 			if (sk->sk_type == SOCK_RAW)
 				break;
 
-			if (sk->sk_protocol != IPPROTO_UDP &&
-			    sk->sk_protocol != IPPROTO_UDPLITE &&
-			    sk->sk_protocol != IPPROTO_TCP)
+			if (sk->sk_protocol == IPPROTO_UDP ||
+			    sk->sk_protocol == IPPROTO_UDPLITE) {
+				struct udp_sock *up = udp_sk(sk);
+				if (up->pending == AF_INET6) {
+					retv = -EBUSY;
+					break;
+				}
+			} else if (sk->sk_protocol != IPPROTO_TCP)
 				break;
 
 			if (sk->sk_state != TCP_ESTABLISHED) {
-- 
1.5.3.rc5

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