Commit | Line | Data |
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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 | ||
33de014c PE |
31 | static inline unsigned int inet6_ehashfn(struct net *net, |
32 | const struct in6_addr *laddr, const u16 lport, | |
d2ecd9cc | 33 | const struct in6_addr *faddr, const __be16 fport) |
5324a040 | 34 | { |
08dcdbf6 | 35 | u32 ports = (((u32)lport) << 16) | (__force u32)fport; |
5324a040 | 36 | |
b3da2cf3 | 37 | return jhash_3words((__force u32)laddr->s6_addr32[3], |
08dcdbf6 ED |
38 | ipv6_addr_jhash(faddr), |
39 | ports, | |
40 | inet_ehash_secret + net_hash_mix(net)); | |
5324a040 ACM |
41 | } |
42 | ||
81c3d547 | 43 | static inline int inet6_sk_ehashfn(const struct sock *sk) |
5324a040 ACM |
44 | { |
45 | const struct inet_sock *inet = inet_sk(sk); | |
46 | const struct ipv6_pinfo *np = inet6_sk(sk); | |
47 | const struct in6_addr *laddr = &np->rcv_saddr; | |
48 | const struct in6_addr *faddr = &np->daddr; | |
c720c7e8 ED |
49 | const __u16 lport = inet->inet_num; |
50 | const __be16 fport = inet->inet_dport; | |
33de014c PE |
51 | struct net *net = sock_net(sk); |
52 | ||
53 | return inet6_ehashfn(net, laddr, lport, faddr, fport); | |
5324a040 ACM |
54 | } |
55 | ||
9327f705 | 56 | extern int __inet6_hash(struct sock *sk, struct inet_timewait_sock *twp); |
90b19d31 | 57 | |
5324a040 ACM |
58 | /* |
59 | * Sockets in TCP_CLOSE state are _always_ taken out of the hash, so | |
60 | * we need not check it for TCP lookups anymore, thanks Alexey. -DaveM | |
61 | * | |
62 | * The sockhash lock must be held as a reader here. | |
63 | */ | |
d86e0dac PE |
64 | extern struct sock *__inet6_lookup_established(struct net *net, |
65 | struct inet_hashinfo *hashinfo, | |
5324a040 | 66 | const struct in6_addr *saddr, |
d2ecd9cc | 67 | const __be16 sport, |
5324a040 ACM |
68 | const struct in6_addr *daddr, |
69 | const u16 hnum, | |
b1a7ffcb | 70 | const int dif); |
5324a040 | 71 | |
d86e0dac PE |
72 | extern struct sock *inet6_lookup_listener(struct net *net, |
73 | struct inet_hashinfo *hashinfo, | |
5ba24953 TH |
74 | const struct in6_addr *saddr, |
75 | const __be16 sport, | |
5324a040 ACM |
76 | const struct in6_addr *daddr, |
77 | const unsigned short hnum, | |
78 | const int dif); | |
79 | ||
d86e0dac PE |
80 | static inline struct sock *__inet6_lookup(struct net *net, |
81 | struct inet_hashinfo *hashinfo, | |
5324a040 | 82 | const struct in6_addr *saddr, |
d2ecd9cc | 83 | const __be16 sport, |
5324a040 ACM |
84 | const struct in6_addr *daddr, |
85 | const u16 hnum, | |
86 | const int dif) | |
87 | { | |
d86e0dac PE |
88 | struct sock *sk = __inet6_lookup_established(net, hashinfo, saddr, |
89 | sport, daddr, hnum, dif); | |
5324a040 ACM |
90 | if (sk) |
91 | return sk; | |
92 | ||
5ba24953 TH |
93 | return inet6_lookup_listener(net, hashinfo, saddr, sport, |
94 | daddr, hnum, dif); | |
5324a040 ACM |
95 | } |
96 | ||
9a1f27c4 ACM |
97 | static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo, |
98 | struct sk_buff *skb, | |
99 | const __be16 sport, | |
100 | const __be16 dport) | |
101 | { | |
c7109986 | 102 | struct sock *sk = skb_steal_sock(skb); |
23542618 | 103 | |
c7109986 | 104 | if (sk) |
23542618 | 105 | return sk; |
c7109986 ED |
106 | |
107 | return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo, | |
108 | &ipv6_hdr(skb)->saddr, sport, | |
109 | &ipv6_hdr(skb)->daddr, ntohs(dport), | |
110 | inet6_iif(skb)); | |
9a1f27c4 ACM |
111 | } |
112 | ||
d86e0dac | 113 | extern struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo, |
d2ecd9cc AV |
114 | const struct in6_addr *saddr, const __be16 sport, |
115 | const struct in6_addr *daddr, const __be16 dport, | |
505cbfc5 | 116 | const int dif); |
dfd56b8b | 117 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
505cbfc5 | 118 | #endif /* _INET6_HASHTABLES_H */ |