Commit | Line | Data |
---|---|---|
5324a040 ACM |
1 | /* |
2 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
3 | * operating system. INET is implemented using the BSD Socket | |
4 | * interface as the means of communication with the user level. | |
5 | * | |
6 | * Generic INET6 transport hashtables | |
7 | * | |
8 | * Authors: Lotsa people, from code originally in tcp | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
16 | #include <linux/config.h> | |
17 | ||
18 | #include <linux/module.h> | |
19 | ||
20 | #include <net/inet_connection_sock.h> | |
21 | #include <net/inet_hashtables.h> | |
22 | #include <net/inet6_hashtables.h> | |
23 | ||
24 | struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo, | |
25 | const struct in6_addr *daddr, | |
26 | const unsigned short hnum, const int dif) | |
27 | { | |
28 | struct sock *sk; | |
29 | const struct hlist_node *node; | |
30 | struct sock *result = NULL; | |
31 | int score, hiscore = 0; | |
32 | ||
33 | read_lock(&hashinfo->lhash_lock); | |
34 | sk_for_each(sk, node, &hashinfo->listening_hash[inet_lhashfn(hnum)]) { | |
35 | if (inet_sk(sk)->num == hnum && sk->sk_family == PF_INET6) { | |
36 | const struct ipv6_pinfo *np = inet6_sk(sk); | |
37 | ||
38 | score = 1; | |
39 | if (!ipv6_addr_any(&np->rcv_saddr)) { | |
40 | if (!ipv6_addr_equal(&np->rcv_saddr, daddr)) | |
41 | continue; | |
42 | score++; | |
43 | } | |
44 | if (sk->sk_bound_dev_if) { | |
45 | if (sk->sk_bound_dev_if != dif) | |
46 | continue; | |
47 | score++; | |
48 | } | |
49 | if (score == 3) { | |
50 | result = sk; | |
51 | break; | |
52 | } | |
53 | if (score > hiscore) { | |
54 | hiscore = score; | |
55 | result = sk; | |
56 | } | |
57 | } | |
58 | } | |
59 | if (result) | |
60 | sock_hold(result); | |
61 | read_unlock(&hashinfo->lhash_lock); | |
62 | return result; | |
63 | } | |
64 | ||
65 | EXPORT_SYMBOL_GPL(inet6_lookup_listener); | |
66 | ||
67 | struct sock *inet6_lookup(struct inet_hashinfo *hashinfo, | |
68 | const struct in6_addr *saddr, const u16 sport, | |
69 | const struct in6_addr *daddr, const u16 dport, | |
70 | const int dif) | |
71 | { | |
72 | struct sock *sk; | |
73 | ||
74 | local_bh_disable(); | |
75 | sk = __inet6_lookup(hashinfo, saddr, sport, daddr, ntohs(dport), dif); | |
76 | local_bh_enable(); | |
77 | ||
78 | return sk; | |
79 | } | |
80 | ||
81 | EXPORT_SYMBOL_GPL(inet6_lookup); |