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| author | Octavian Purdila <opurdila@ixiacom.com> | 2010-01-06 20:37:01 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-01-06 20:37:01 -0800 |
| commit | 7ad6848c7e81a603605fad3f3575841aab004eea (patch) | |
| tree | c95cc3473a2c47d6dedbbe5bc1a298546fc4127f /include/net | |
| parent | 58933c643f86651decc4818cf680f9ec3b0460d2 (diff) | |
| download | linux-7ad6848c7e81a603605fad3f3575841aab004eea.tar.gz linux-7ad6848c7e81a603605fad3f3575841aab004eea.tar.bz2 linux-7ad6848c7e81a603605fad3f3575841aab004eea.zip | |
ip: fix mc_loop checks for tunnels with multicast outer addresses
When we have L3 tunnels with different inner/outer families
(i.e. IPV4/IPV6) which use a multicast address as the outer tunnel
destination address, multicast packets will be loopbacked back to the
sending socket even if IP*_MULTICAST_LOOP is set to disabled.
The mc_loop flag is present in the family specific part of the socket
(e.g. the IPv4 or IPv4 specific part). setsockopt sets the inner
family mc_loop flag. When the packet is pushed through the L3 tunnel
it will eventually be processed by the outer family which if different
will check the flag in a different part of the socket then it was set.
Signed-off-by: Octavian Purdila <opurdila@ixiacom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/ip.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/net/ip.h b/include/net/ip.h index 85108cfbb1ae..d9a0e74d8923 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -326,6 +326,22 @@ static __inline__ void inet_reset_saddr(struct sock *sk) #endif +static inline int sk_mc_loop(struct sock *sk) +{ + if (!sk) + return 1; + switch (sk->sk_family) { + case AF_INET: + return inet_sk(sk)->mc_loop; +#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) + case AF_INET6: + return inet6_sk(sk)->mc_loop; +#endif + } + __WARN(); + return 1; +} + extern int ip_call_ra_chain(struct sk_buff *skb); /* |