netdev - [PATCH] ipv6: add special mode forwarding=2 to send RS while configured as router

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Message-ID: <20100903130420.GB28460@bombadil.infradead.org>
Date:	Fri, 3 Sep 2010 09:04:20 -0400
From:	Thomas Graf <tgraf@...radead.org>
To:	netdev@...r.kernel.org
Cc:	davem@...r.kernel.org, yoshfuji@...ux-ipv6.org
Subject: [PATCH] ipv6: add special mode forwarding=2 to send RS while
 configured as router

Similar to accepting router advertisement, the IPv6 stack does not send router
solicitations if forwarding is enabled.

This patch enables this behavior to be overruled by setting forwarding to the
special value 2.

Signed-off-by: Thomas Graf <tgraf@...radead.org>

Index: net-2.6/net/ipv6/addrconf.c
===================================================================
--- net-2.6.orig/net/ipv6/addrconf.c
+++ net-2.6/net/ipv6/addrconf.c
@@ -2964,7 +2964,8 @@ static void addrconf_dad_completed(struc
 	   start sending router solicitations.
 	 */
 
-	if (ifp->idev->cnf.forwarding == 0 &&
+	if ((ifp->idev->cnf.forwarding == 0 ||
+	     ifp->idev->cnf.forwarding == 2) &&
 	    ifp->idev->cnf.rtr_solicits > 0 &&
 	    (dev->flags&IFF_LOOPBACK) == 0 &&
 	    (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL)) {
--
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