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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, | |
4297a0ef DA |
52 | const u16 hnum, const int dif, |
53 | const int sdif); | |
1fd51155 JP |
54 | |
55 | struct sock *inet6_lookup_listener(struct net *net, | |
56 | struct inet_hashinfo *hashinfo, | |
a583636a | 57 | struct sk_buff *skb, int doff, |
1fd51155 JP |
58 | const struct in6_addr *saddr, |
59 | const __be16 sport, | |
60 | const struct in6_addr *daddr, | |
4297a0ef DA |
61 | const unsigned short hnum, |
62 | const int dif, const int sdif); | |
5324a040 | 63 | |
d86e0dac PE |
64 | static inline struct sock *__inet6_lookup(struct net *net, |
65 | struct inet_hashinfo *hashinfo, | |
a583636a | 66 | struct sk_buff *skb, int doff, |
5324a040 | 67 | const struct in6_addr *saddr, |
d2ecd9cc | 68 | const __be16 sport, |
5324a040 ACM |
69 | const struct in6_addr *daddr, |
70 | const u16 hnum, | |
4297a0ef | 71 | const int dif, const int sdif, |
3b24d854 | 72 | bool *refcounted) |
5324a040 | 73 | { |
d86e0dac | 74 | struct sock *sk = __inet6_lookup_established(net, hashinfo, saddr, |
4297a0ef DA |
75 | sport, daddr, hnum, |
76 | dif, sdif); | |
3b24d854 | 77 | *refcounted = true; |
5324a040 ACM |
78 | if (sk) |
79 | return sk; | |
3b24d854 | 80 | *refcounted = false; |
a583636a | 81 | return inet6_lookup_listener(net, hashinfo, skb, doff, saddr, sport, |
4297a0ef | 82 | daddr, hnum, dif, sdif); |
5324a040 ACM |
83 | } |
84 | ||
9a1f27c4 | 85 | static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo, |
a583636a | 86 | struct sk_buff *skb, int doff, |
9a1f27c4 | 87 | const __be16 sport, |
870c3151 | 88 | const __be16 dport, |
4297a0ef | 89 | int iif, int sdif, |
3b24d854 | 90 | bool *refcounted) |
9a1f27c4 | 91 | { |
c7109986 | 92 | struct sock *sk = skb_steal_sock(skb); |
23542618 | 93 | |
3b24d854 | 94 | *refcounted = true; |
c7109986 | 95 | if (sk) |
23542618 | 96 | return sk; |
c7109986 | 97 | |
a583636a CG |
98 | return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo, skb, |
99 | doff, &ipv6_hdr(skb)->saddr, sport, | |
c7109986 | 100 | &ipv6_hdr(skb)->daddr, ntohs(dport), |
4297a0ef | 101 | iif, sdif, refcounted); |
9a1f27c4 ACM |
102 | } |
103 | ||
1fd51155 | 104 | struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo, |
a583636a | 105 | struct sk_buff *skb, int doff, |
1fd51155 JP |
106 | const struct in6_addr *saddr, const __be16 sport, |
107 | const struct in6_addr *daddr, const __be16 dport, | |
108 | const int dif); | |
496611d7 CG |
109 | |
110 | int inet6_hash(struct sock *sk); | |
dfd56b8b | 111 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
25de4668 | 112 | |
4297a0ef | 113 | #define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif, __sdif) \ |
25de4668 WC |
114 | (((__sk)->sk_portpair == (__ports)) && \ |
115 | ((__sk)->sk_family == AF_INET6) && \ | |
116 | ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \ | |
117 | ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \ | |
118 | (!(__sk)->sk_bound_dev_if || \ | |
4297a0ef DA |
119 | ((__sk)->sk_bound_dev_if == (__dif)) || \ |
120 | ((__sk)->sk_bound_dev_if == (__sdif))) && \ | |
25de4668 WC |
121 | net_eq(sock_net(__sk), (__net))) |
122 | ||
505cbfc5 | 123 | #endif /* _INET6_HASHTABLES_H */ |