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505cbfc5 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 | * Authors: Lotsa people, from code originally in tcp | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the License, or (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #ifndef _INET6_HASHTABLES_H | |
15 | #define _INET6_HASHTABLES_H | |
16 | ||
5324a040 | 17 | |
dfd56b8b | 18 | #if IS_ENABLED(CONFIG_IPV6) |
5324a040 ACM |
19 | #include <linux/in6.h> |
20 | #include <linux/ipv6.h> | |
505cbfc5 | 21 | #include <linux/types.h> |
b3da2cf3 DM |
22 | #include <linux/jhash.h> |
23 | ||
24 | #include <net/inet_sock.h> | |
505cbfc5 | 25 | |
5324a040 | 26 | #include <net/ipv6.h> |
0b441916 | 27 | #include <net/netns/hash.h> |
5324a040 | 28 | |
505cbfc5 ACM |
29 | struct inet_hashinfo; |
30 | ||
b50026b5 HFS |
31 | static inline unsigned int __inet6_ehashfn(const u32 lhash, |
32 | const u16 lport, | |
33 | const u32 fhash, | |
34 | const __be16 fport, | |
35 | const u32 initval) | |
5324a040 | 36 | { |
b50026b5 HFS |
37 | const u32 ports = (((u32)lport) << 16) | (__force u32)fport; |
38 | return jhash_3words(lhash, fhash, ports, initval); | |
5324a040 ACM |
39 | } |
40 | ||
41 | /* | |
42 | * Sockets in TCP_CLOSE state are _always_ taken out of the hash, so | |
43 | * we need not check it for TCP lookups anymore, thanks Alexey. -DaveM | |
44 | * | |
45 | * The sockhash lock must be held as a reader here. | |
46 | */ | |
1fd51155 JP |
47 | struct sock *__inet6_lookup_established(struct net *net, |
48 | struct inet_hashinfo *hashinfo, | |
49 | const struct in6_addr *saddr, | |
50 | const __be16 sport, | |
51 | const struct in6_addr *daddr, | |
52 | const u16 hnum, const int dif); | |
53 | ||
54 | struct sock *inet6_lookup_listener(struct net *net, | |
55 | struct inet_hashinfo *hashinfo, | |
56 | const struct in6_addr *saddr, | |
57 | const __be16 sport, | |
58 | const struct in6_addr *daddr, | |
59 | const unsigned short hnum, const int dif); | |
5324a040 | 60 | |
d86e0dac PE |
61 | static inline struct sock *__inet6_lookup(struct net *net, |
62 | struct inet_hashinfo *hashinfo, | |
5324a040 | 63 | const struct in6_addr *saddr, |
d2ecd9cc | 64 | const __be16 sport, |
5324a040 ACM |
65 | const struct in6_addr *daddr, |
66 | const u16 hnum, | |
67 | const int dif) | |
68 | { | |
d86e0dac PE |
69 | struct sock *sk = __inet6_lookup_established(net, hashinfo, saddr, |
70 | sport, daddr, hnum, dif); | |
5324a040 ACM |
71 | if (sk) |
72 | return sk; | |
73 | ||
5ba24953 TH |
74 | return inet6_lookup_listener(net, hashinfo, saddr, sport, |
75 | daddr, hnum, dif); | |
5324a040 ACM |
76 | } |
77 | ||
9a1f27c4 ACM |
78 | static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo, |
79 | struct sk_buff *skb, | |
80 | const __be16 sport, | |
870c3151 ED |
81 | const __be16 dport, |
82 | int iif) | |
9a1f27c4 | 83 | { |
c7109986 | 84 | struct sock *sk = skb_steal_sock(skb); |
23542618 | 85 | |
c7109986 | 86 | if (sk) |
23542618 | 87 | return sk; |
c7109986 ED |
88 | |
89 | return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo, | |
90 | &ipv6_hdr(skb)->saddr, sport, | |
91 | &ipv6_hdr(skb)->daddr, ntohs(dport), | |
870c3151 | 92 | iif); |
9a1f27c4 ACM |
93 | } |
94 | ||
1fd51155 JP |
95 | struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo, |
96 | const struct in6_addr *saddr, const __be16 sport, | |
97 | const struct in6_addr *daddr, const __be16 dport, | |
98 | const int dif); | |
dfd56b8b | 99 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
25de4668 WC |
100 | |
101 | #define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \ | |
102 | (((__sk)->sk_portpair == (__ports)) && \ | |
103 | ((__sk)->sk_family == AF_INET6) && \ | |
104 | ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \ | |
105 | ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \ | |
106 | (!(__sk)->sk_bound_dev_if || \ | |
107 | ((__sk)->sk_bound_dev_if == (__dif))) && \ | |
108 | net_eq(sock_net(__sk), (__net))) | |
109 | ||
505cbfc5 | 110 | #endif /* _INET6_HASHTABLES_H */ |