diff options
| author | Ingo Molnar <mingo@kernel.org> | 2014-07-28 10:03:00 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-07-28 10:03:00 +0200 |
| commit | ca5bc6cd5de5b53eb8fd6fea39aa3fe2a1e8c3d9 (patch) | |
| tree | 75beaae2d4b6bc654eb28994dd5906d8dcf5ef46 /net/ipv6/mcast.c | |
| parent | c1221321b7c25b53204447cff9949a6d5a7ddddc (diff) | |
| parent | d8d28c8f00e84a72e8bee39a85835635417bee49 (diff) | |
| download | linux-ca5bc6cd5de5b53eb8fd6fea39aa3fe2a1e8c3d9.tar.bz2 | |
Merge branch 'sched/urgent' into sched/core, to merge fixes before applying new changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'net/ipv6/mcast.c')
| -rw-r--r-- | net/ipv6/mcast.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index 08b367c6b9cf..617f0958e164 100644 --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -1301,8 +1301,17 @@ int igmp6_event_query(struct sk_buff *skb) len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr); len -= skb_network_header_len(skb); - /* Drop queries with not link local source */ - if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL)) + /* RFC3810 6.2 + * Upon reception of an MLD message that contains a Query, the node + * checks if the source address of the message is a valid link-local + * address, if the Hop Limit is set to 1, and if the Router Alert + * option is present in the Hop-By-Hop Options header of the IPv6 + * packet. If any of these checks fails, the packet is dropped. + */ + if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL) || + ipv6_hdr(skb)->hop_limit != 1 || + !(IP6CB(skb)->flags & IP6SKB_ROUTERALERT) || + IP6CB(skb)->ra != htons(IPV6_OPT_ROUTERALERT_MLD)) return -EINVAL; idev = __in6_dev_get(skb->dev); |