82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
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/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Generic INET6 transport hashtables
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*
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* Authors: Lotsa people, from code originally in tcp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <net/inet_connection_sock.h>
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#include <net/inet_hashtables.h>
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#include <net/inet6_hashtables.h>
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struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo,
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const struct in6_addr *daddr,
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const unsigned short hnum, const int dif)
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{
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struct sock *sk;
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const struct hlist_node *node;
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struct sock *result = NULL;
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int score, hiscore = 0;
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read_lock(&hashinfo->lhash_lock);
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sk_for_each(sk, node, &hashinfo->listening_hash[inet_lhashfn(hnum)]) {
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if (inet_sk(sk)->num == hnum && sk->sk_family == PF_INET6) {
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const struct ipv6_pinfo *np = inet6_sk(sk);
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score = 1;
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if (!ipv6_addr_any(&np->rcv_saddr)) {
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if (!ipv6_addr_equal(&np->rcv_saddr, daddr))
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continue;
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score++;
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}
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if (sk->sk_bound_dev_if) {
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if (sk->sk_bound_dev_if != dif)
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continue;
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score++;
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}
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if (score == 3) {
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result = sk;
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break;
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}
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if (score > hiscore) {
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hiscore = score;
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result = sk;
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}
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}
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}
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if (result)
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sock_hold(result);
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read_unlock(&hashinfo->lhash_lock);
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return result;
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}
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EXPORT_SYMBOL_GPL(inet6_lookup_listener);
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struct sock *inet6_lookup(struct inet_hashinfo *hashinfo,
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const struct in6_addr *saddr, const u16 sport,
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const struct in6_addr *daddr, const u16 dport,
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const int dif)
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{
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struct sock *sk;
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local_bh_disable();
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sk = __inet6_lookup(hashinfo, saddr, sport, daddr, ntohs(dport), dif);
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local_bh_enable();
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return sk;
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}
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EXPORT_SYMBOL_GPL(inet6_lookup);
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