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[IPV6]: ROUTE: Add accept_ra_defrtr sysctl.

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This controls whether we accept default router information
in RAs.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
YOSHIFUJI Hideaki
2006-03-20 16:55:08 -08:00
committed by David S. Miller
parent 073a8e0e15
commit 65f5c7c114
5 changed files with 26 additions and 1 deletions
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7
net/ipv6/ndisc.c
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@@ -1019,7 +1019,7 @@ static void ndisc_router_discovery(struct sk_buff *skb)
struct ra_msg *ra_msg = (struct ra_msg *) skb->h.raw;
struct neighbour *neigh = NULL;
struct inet6_dev *in6_dev;
struct rt6_info *rt;
struct rt6_info *rt = NULL;
int lifetime;
struct ndisc_options ndopts;
int optlen;
@@ -1081,6 +1081,9 @@ static void ndisc_router_discovery(struct sk_buff *skb)
(ra_msg->icmph.icmp6_addrconf_other ?
IF_RA_OTHERCONF : 0);
if (!in6_dev->cnf.accept_ra_defrtr)
goto skip_defrtr;
lifetime = ntohs(ra_msg->icmph.icmp6_rt_lifetime);
rt = rt6_get_dflt_router(&skb->nh.ipv6h->saddr, skb->dev);
@@ -1128,6 +1131,8 @@ static void ndisc_router_discovery(struct sk_buff *skb)
rt->u.dst.metrics[RTAX_HOPLIMIT-1] = ra_msg->icmph.icmp6_hop_limit;
}
skip_defrtr:
/*
* Update Reachable Time and Retrans Timer
*/