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[IPV4]: INET_MATCH() annotations

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INET_MATCH() and friends depend on an interesting set of kludges:
	* there's a pair of adjacent fields in struct inet_sock - __be16 dport
followed by __u16 num.  We want to search by pair, so we combine the keys into
a single 32bit value and compare with 32bit value read from &...->dport.
	* on 64bit targets we combine comparisons with pair of adjacent __be32
fields in the same way.

Make sure that we don't mix those values with anything else and that pairs
we form them from have correct types.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Al Viro 2006-09-27 18:43:07 -07:00 • committed by David S. Miller
parent 45d60b9e29
commit 4f765d842f
4 changed files with 31 additions and 17 deletions
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2
include/linux/ipv6.h
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@ -461,7 +461,7 @@ static inline struct raw6_sock *raw6_sk(const struct sock *sk)
#define INET6_MATCH(__sk, __hash, __saddr, __daddr, __ports, __dif)\
(((__sk)->sk_hash == (__hash)) && \
((*((__u32 *)&(inet_sk(__sk)->dport))) == (__ports)) && \
((*((__portpair *)&(inet_sk(__sk)->dport))) == (__ports)) && \
((__sk)->sk_family == AF_INET6) && \
ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \