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ipv6: judge the accept_ra_defrtr before calling rt6_route_rcv

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when dealing with a RA message, if accept_ra_defrtr is false,
the kernel will not add the default route, and then deal with
the following route information options. Unfortunately, those
options maybe contain default route, so let's judge the
accept_ra_defrtr before calling rt6_route_rcv.

Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Duan Jiong 2013-11-26 15:46:56 +08:00 committed by David S. Miller
parent a45299e727
commit 30e56918dd
1 changed files with 3 additions and 0 deletions
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3
net/ipv6/ndisc.c
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@ -1277,6 +1277,9 @@ skip_linkparms:
ri->prefix_len == 0) ri->prefix_len == 0)
continue; continue;
#endif #endif
if (ri->prefix_len == 0 &&
!in6_dev->cnf.accept_ra_defrtr)
continue;
if (ri->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen) if (ri->prefix_len > in6_dev->cnf.accept_ra_rt_info_max_plen)
continue; continue;
rt6_route_rcv(skb->dev, (u8*)p, (p->nd_opt_len) << 3, rt6_route_rcv(skb->dev, (u8*)p, (p->nd_opt_len) << 3,