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[TCP/DCCP]: Randomize port selection

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This patch randomizes the port selected on bind() for connections
to help with possible security attacks. It should also be faster
in most cases because there is no need for a global lock.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
This commit is contained in:
Stephen Hemminger
2005-11-03 16:33:23 -08:00
committed by Arnaldo Carvalho de Melo
parent 6151b31c96
commit 6df716340d
6 changed files with 10 additions and 56 deletions
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2
include/net/inet_hashtables.h
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@@ -125,9 +125,7 @@ struct inet_hashinfo {
rwlock_t lhash_lock ____cacheline_aligned;
atomic_t lhash_users;
wait_queue_head_t lhash_wait;
spinlock_t portalloc_lock;
kmem_cache_t *bind_bucket_cachep;
int port_rover;
};
static inline unsigned int inet_ehashfn(const __u32 laddr, const __u16 lport,