linux-kernel - [PATCH] SCTP: fix IPv4 addr in SCTPv6 accept()/getpeername()

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Message-ID: <18103.35121.595637.783369@zeus.sw.starentnetworks.com>
Date:	Mon, 6 Aug 2007 16:48:49 -0400
From:	Dave Johnson <djohnson+linux-kernel@...starentnetworks.com>
To:	Vlad Yasevich <vladislav.yasevich@...com>
Cc:	David Miller <davem@...emloft.net>,
	lksctp-developers@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org,
	Srinivas Akkipeddi <sakkiped@...rentnetworks.com>
Subject: [PATCH] SCTP: fix IPv4 addr in SCTPv6 accept()/getpeername()


An accept() call on a SCTPv6 socket that returns due to connection of
a IPv4 mapped peer will fill out the 'struct sockaddr' with a zero
IPv6 address instead of the IPv4 mapped address of the peer.

This is due to the v4mapped flag not getting copied into the new
socket on accept().

Signed-off-by: Dave Johnson <djohnson@...starentnetworks.com>
Cc: Srinivas Akkipeddi <sakkiped@...rentnetworks.com>

===== net/sctp/ipv6.c 1.108 vs edited =====
--- 1.108/net/sctp/ipv6.c	2007-07-05 20:40:15 -04:00
+++ edited/net/sctp/ipv6.c	2007-07-25 16:30:41 -04:00
@@ -641,6 +641,8 @@
 	newsctp6sk = (struct sctp6_sock *)newsk;
 	inet_sk(newsk)->pinet6 = &newsctp6sk->inet6;
 
+	sctp_sk(newsk)->v4mapped = sctp_sk(sk)->v4mapped;
+
 	newinet = inet_sk(newsk);
 	newnp = inet6_sk(newsk);
 

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