[IPV6]: ROUTE: Add accept_ra_rt_info_max_plen sysctl.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 1f62569..dfa20d3 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1214,11 +1214,13 @@
}
#ifdef CONFIG_IPV6_ROUTE_INFO
- if (ndopts.nd_opts_ri) {
+ if (in6_dev->cnf.accept_ra_rtr_pref && ndopts.nd_opts_ri) {
struct nd_opt_hdr *p;
for (p = ndopts.nd_opts_ri;
p;
p = ndisc_next_option(p, ndopts.nd_opts_ri_end)) {
+ if (((struct route_info *)p)->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen)
+ continue;
rt6_route_rcv(skb->dev, (u8*)p, (p->nd_opt_len) << 3,
&skb->nh.ipv6h->saddr);
}