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ipv6: don't accept multicast traffic with scope 0

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v2:
a) moved before multicast source address check
b) changed comment to netdev style

Cc: Erik Hugne <[email protected]>
Cc: YOSHIFUJI Hideaki <[email protected]>
Acked-by: YOSHIFUJI Hideaki <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Acked-by: YOSHIFUJI Hideaki <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Hannes Frederic Sowa 2013-02-10 05:35:22 +00:00 • committed by David S. Miller
commit 20314092c1
1 changed files with 9 additions and 0 deletions
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9
net/ipv6/ip6_input.c
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@ -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