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[UDP]: Unify UDPv4 and UDPv6 ->get_port()

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This patch creates one common function which is called by
udp_v4_get_port() and udp_v6_get_port(). As a result,
  * duplicated code is removed
  * udp_port_rover and local port lookup can now be removed from udp.h
  * further savings follow since the same function will be used by UDP-Litev4
    and UDP-Litev6

In contrast to the patch sent in response to Yoshifujis comments
(fixed by this variant), the code below also removes the
EXPORT_SYMBOL(udp_port_rover), since udp_port_rover can now remain
local to net/ipv4/udp.c.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gerrit Renker
2006-08-26 20:06:05 -07:00
committed by David S. Miller
parent 6a28ec8cd0
commit 25030a7f9e
3 changed files with 63 additions and 125 deletions
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18
include/net/udp.h
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@@ -30,25 +30,9 @@
#define UDP_HTABLE_SIZE 128
/* udp.c: This needs to be shared by v4 and v6 because the lookup
* and hashing code needs to work with different AF's yet
* the port space is shared.
*/
extern struct hlist_head udp_hash[UDP_HTABLE_SIZE];
extern rwlock_t udp_hash_lock;
extern int udp_port_rover;
static inline int udp_lport_inuse(u16 num)
{
struct sock *sk;
struct hlist_node *node;
sk_for_each(sk, node, &udp_hash[num & (UDP_HTABLE_SIZE - 1)])
if (inet_sk(sk)->num == num)
return 1;
return 0;
}
/* Note: this must match 'valbool' in sock_setsockopt */
#define UDP_CSUM_NOXMIT 1
@@ -63,6 +47,8 @@ extern struct proto udp_prot;
struct sk_buff;
extern int udp_get_port(struct sock *sk, unsigned short snum,
int (*saddr_cmp)(struct sock *, struct sock *));
extern void udp_err(struct sk_buff *, u32);
extern int udp_sendmsg(struct kiocb *iocb, struct sock *sk,