Commit 3e8b0ac3 authored Mar 03, 2013 by Lorenzo Colitti Committed by David S. Miller Mar 04, 2013

net: ipv6: Don't purge default router if accept_ra=2



Setting net.ipv6.conf.<interface>.accept_ra=2 causes the kernel
to accept RAs even when forwarding is enabled. However, enabling
forwarding purges all default routes on the system, breaking
connectivity until the next RA is received. Fix this by not
purging default routes on interfaces that have accept_ra=2.

Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent de5fb0a0

net/ipv6/route.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -1915,7 +1915,8 @@ void rt6_purge_dflt_routers(struct net *net)
		restart:
		read_lock_bh(&table->tb6_lock);
		for (rt = table->tb6_root.leaf; rt; rt = rt->dst.rt6_next) {
		if (rt->rt6i_flags & (RTF_DEFAULT \| RTF_ADDRCONF)) {
		if (rt->rt6i_flags & (RTF_DEFAULT \| RTF_ADDRCONF) &&
		(!rt->rt6i_idev \|\| rt->rt6i_idev->cnf.accept_ra != 2)) {
		dst_hold(&rt->dst);
		read_unlock_bh(&table->tb6_lock);
		ip6_del_rt(rt);

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