[PATCH] [50/50] ipv6: add special mode forwarding=2 to send RS while

Andi Kleen
2011-07-28T23:46:00Z

From: Thomas Graf <tgraf@infradead.org>

[ upstream commit c3bccac2fa76f1619dfe4fb7b9bee69de7f066d8 ]
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@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

Index: linux-2.6.35.y/net/ipv6/addrconf.c
===================================================================
--- linux-2.6.35.y.orig/net/ipv6/addrconf.c
+++ linux-2.6.35.y/net/ipv6/addrconf.c
@@ -2960,7 +2960,8 @@ 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)) {