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| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2013-02-10 05:35:22 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-02-11 14:00:54 -0500 |
| commit | 20314092c1b41894d8c181bf9aa6f022be2416aa (patch) | |
| tree | 7b4f864e1c88ec8f48a9662258943c973f9b7bb3 /net | |
| parent | dd40851521361e07c1f61e79cca941a63ad311bc (diff) | |
| download | linux-20314092c1b41894d8c181bf9aa6f022be2416aa.tar.gz | |
ipv6: don't accept multicast traffic with scope 0
v2: a) moved before multicast source address check b) changed comment to netdev style Cc: Erik Hugne <erik.hugne@ericsson.com> Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/ip6_input.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c index 4ac5bf30e16a..5b10414e619e 100644 --- a/net/ipv6/ip6_input.c +++ b/net/ipv6/ip6_input.c @@ -118,6 +118,15 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt ipv6_addr_loopback(&hdr->daddr)) goto err; + /* RFC4291 2.7 + * Nodes must not originate a packet to a multicast address whose scope + * field contains the reserved value 0; if such a packet is received, it + * must be silently dropped. + */ + if (ipv6_addr_is_multicast(&hdr->daddr) && + IPV6_ADDR_MC_SCOPE(&hdr->daddr) == 0) + goto err; + /* * RFC4291 2.7 * Multicast addresses must not be used as source addresses in IPv6 |