netdev - [PATCH] ipv6: udp: check sk->sk_no_check when sending udpv6 packet

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Message-ID: <52DC9D25.9070809@cn.fujitsu.com>
Date:	Mon, 20 Jan 2014 11:51:01 +0800
From:	Duan Jiong <duanj.fnst@...fujitsu.com>
To:	David Miller <davem@...emloft.net>
CC:	netdev <netdev@...r.kernel.org>
Subject: [PATCH] ipv6: udp: check sk->sk_no_check when sending udpv6 packet


According to the user's intention, if SO_NO_CHECK option is
set to true, the udpv6 packet should be out with no checksum.

Signed-off-by: Duan Jiong <duanj.fnst@...fujitsu.com>
---
 net/ipv6/udp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 089c741..8808c69 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1001,6 +1001,10 @@ static int udp_v6_push_pending_frames(struct sock *sk)
 
 	if (is_udplite)
 		csum = udplite_csum_outgoing(sk, skb);
+	else if (sk->sk_no_check == UDP_CSUM_NOXMIT) {
+		skb->ip_summed = CHECKSUM_NONE;
+		goto send;
+	}
 	else if (skb->ip_summed == CHECKSUM_PARTIAL) { /* UDP hardware csum */
 		udp6_hwcsum_outgoing(sk, skb, &fl6->saddr, &fl6->daddr,
 				     up->len);
-- 
1.8.3.1
--
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