From patchwork Mon Jan 20 03:51:01 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Duan Jiong X-Patchwork-Id: 312443 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id CF0572C008F for ; Mon, 20 Jan 2014 14:51:47 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752842AbaATDvj (ORCPT ); Sun, 19 Jan 2014 22:51:39 -0500 Received: from cn.fujitsu.com ([222.73.24.84]:39115 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752430AbaATDvi (ORCPT ); Sun, 19 Jan 2014 22:51:38 -0500 X-IronPort-AV: E=Sophos;i="4.95,688,1384272000"; d="scan'208";a="9434539" Received: from unknown (HELO tang.cn.fujitsu.com) ([10.167.250.3]) by song.cn.fujitsu.com with ESMTP; 20 Jan 2014 11:47:56 +0800 Received: from fnstmail02.fnst.cn.fujitsu.com (tang.cn.fujitsu.com [127.0.0.1]) by tang.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id s0K3pZ11021828; Mon, 20 Jan 2014 11:51:35 +0800 Received: from [10.167.225.86] ([10.167.225.86]) by fnstmail02.fnst.cn.fujitsu.com (Lotus Domino Release 8.5.3) with ESMTP id 2014012011501532-1206043 ; Mon, 20 Jan 2014 11:50:15 +0800 Message-ID: <52DC9D25.9070809@cn.fujitsu.com> Date: Mon, 20 Jan 2014 11:51:01 +0800 From: Duan Jiong User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.1.0 MIME-Version: 1.0 To: David Miller CC: netdev Subject: [PATCH] ipv6: udp: check sk->sk_no_check when sending udpv6 packet X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2014/01/20 11:50:15, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2014/01/20 11:50:15, Serialize complete at 2014/01/20 11:50:15 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org 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 --- 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);