mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-28 21:45:01 +08:00
5324a040cc
Doing this we allow tcp_diag to support IPV6 even if tcp_diag is compiled statically and IPV6 is compiled as a module, removing the previous restriction while not building any IPV6 code if it is not selected. Now to work on the tcpdiag_register infrastructure and then to rename the whole thing to inetdiag, reflecting its by then completely generic nature. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/*
|
|
* INET An implementation of the TCP/IP protocol suite for the LINUX
|
|
* operating system. INET is implemented using the BSD Socket
|
|
* interface as the means of communication with the user level.
|
|
*
|
|
* Generic INET6 transport hashtables
|
|
*
|
|
* Authors: Lotsa people, from code originally in tcp
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <net/inet_connection_sock.h>
|
|
#include <net/inet_hashtables.h>
|
|
#include <net/inet6_hashtables.h>
|
|
|
|
struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo,
|
|
const struct in6_addr *daddr,
|
|
const unsigned short hnum, const int dif)
|
|
{
|
|
struct sock *sk;
|
|
const struct hlist_node *node;
|
|
struct sock *result = NULL;
|
|
int score, hiscore = 0;
|
|
|
|
read_lock(&hashinfo->lhash_lock);
|
|
sk_for_each(sk, node, &hashinfo->listening_hash[inet_lhashfn(hnum)]) {
|
|
if (inet_sk(sk)->num == hnum && sk->sk_family == PF_INET6) {
|
|
const struct ipv6_pinfo *np = inet6_sk(sk);
|
|
|
|
score = 1;
|
|
if (!ipv6_addr_any(&np->rcv_saddr)) {
|
|
if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
|
|
continue;
|
|
score++;
|
|
}
|
|
if (sk->sk_bound_dev_if) {
|
|
if (sk->sk_bound_dev_if != dif)
|
|
continue;
|
|
score++;
|
|
}
|
|
if (score == 3) {
|
|
result = sk;
|
|
break;
|
|
}
|
|
if (score > hiscore) {
|
|
hiscore = score;
|
|
result = sk;
|
|
}
|
|
}
|
|
}
|
|
if (result)
|
|
sock_hold(result);
|
|
read_unlock(&hashinfo->lhash_lock);
|
|
return result;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(inet6_lookup_listener);
|
|
|
|
struct sock *inet6_lookup(struct inet_hashinfo *hashinfo,
|
|
const struct in6_addr *saddr, const u16 sport,
|
|
const struct in6_addr *daddr, const u16 dport,
|
|
const int dif)
|
|
{
|
|
struct sock *sk;
|
|
|
|
local_bh_disable();
|
|
sk = __inet6_lookup(hashinfo, saddr, sport, daddr, ntohs(dport), dif);
|
|
local_bh_enable();
|
|
|
|
return sk;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(inet6_lookup);
|