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Message-ID: <20071121124532.GA17263@havoc.gtf.org>
Date: Wed, 21 Nov 2007 07:45:32 -0500
From: Jeff Garzik <jeff@...zik.org>
To: netdev@...r.kernel.org
Cc: LKML <linux-kernel@...r.kernel.org>
Subject: [RFC/PATCH] SO_NO_CHECK for IPv6
SO_NO_CHECK support for IPv6 appeared to be missing. This is presented,
based on a reading of net/ipv4/udp.c.
I wonder if IPv4's CHECKSUM_PARTIAL check from udp_push_pending_frames()
also needs to be copied to IPv6?
Signed-off-by: Jeff Garzik <jgarzik@...hat.com>
---
net/ipv6/udp.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index ee1cc3f..7927e69 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -538,9 +538,14 @@ static int udp_v6_push_pending_frames(struct sock *sk)
uh->len = htons(up->len);
uh->check = 0;
- if (up->pcflag)
+ if (up->pcflag) /* UDP-Lite */
csum = udplite_csum_outgoing(sk, skb);
- else
+
+ else if (sk->sk_no_check == UDP_CSUM_NOXMIT) { /* UDP csum disabled */
+ skb->ip_summed = CHECKSUM_NONE;
+ goto send;
+
+ } else
csum = udp_csum_outgoing(sk, skb);
/* add protocol-dependent pseudo-header */
@@ -549,6 +554,7 @@ static int udp_v6_push_pending_frames(struct sock *sk)
if (uh->check == 0)
uh->check = CSUM_MANGLED_0;
+send:
err = ip6_push_pending_frames(sk);
out:
up->len = 0;
-
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