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); | |
efe4208f ED |
46 | const struct in6_addr *laddr = &sk->sk_v6_rcv_saddr; |
47 | const struct in6_addr *faddr = &sk->sk_v6_daddr; | |
c720c7e8 ED |
48 | const __u16 lport = inet->inet_num; |
49 | const __be16 fport = inet->inet_dport; | |
33de014c PE |
50 | struct net *net = sock_net(sk); |
51 | ||
52 | return inet6_ehashfn(net, laddr, lport, faddr, fport); | |
5324a040 ACM |
53 | } |
54 | ||
1fd51155 | 55 | int __inet6_hash(struct sock *sk, struct inet_timewait_sock *twp); |
90b19d31 | 56 | |
5324a040 ACM |
57 | /* |
58 | * Sockets in TCP_CLOSE state are _always_ taken out of the hash, so | |
59 | * we need not check it for TCP lookups anymore, thanks Alexey. -DaveM | |
60 | * | |
61 | * The sockhash lock must be held as a reader here. | |
62 | */ | |
1fd51155 JP |
63 | struct sock *__inet6_lookup_established(struct net *net, |
64 | struct inet_hashinfo *hashinfo, | |
65 | const struct in6_addr *saddr, | |
66 | const __be16 sport, | |
67 | const struct in6_addr *daddr, | |
68 | const u16 hnum, const int dif); | |
69 | ||
70 | struct sock *inet6_lookup_listener(struct net *net, | |
71 | struct inet_hashinfo *hashinfo, | |
72 | const struct in6_addr *saddr, | |
73 | const __be16 sport, | |
74 | const struct in6_addr *daddr, | |
75 | const unsigned short hnum, const int dif); | |
5324a040 | 76 | |
d86e0dac PE |
77 | static inline struct sock *__inet6_lookup(struct net *net, |
78 | struct inet_hashinfo *hashinfo, | |
5324a040 | 79 | const struct in6_addr *saddr, |
d2ecd9cc | 80 | const __be16 sport, |
5324a040 ACM |
81 | const struct in6_addr *daddr, |
82 | const u16 hnum, | |
83 | const int dif) | |
84 | { | |
d86e0dac PE |
85 | struct sock *sk = __inet6_lookup_established(net, hashinfo, saddr, |
86 | sport, daddr, hnum, dif); | |
5324a040 ACM |
87 | if (sk) |
88 | return sk; | |
89 | ||
5ba24953 TH |
90 | return inet6_lookup_listener(net, hashinfo, saddr, sport, |
91 | daddr, hnum, dif); | |
5324a040 ACM |
92 | } |
93 | ||
9a1f27c4 ACM |
94 | static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo, |
95 | struct sk_buff *skb, | |
96 | const __be16 sport, | |
97 | const __be16 dport) | |
98 | { | |
c7109986 | 99 | struct sock *sk = skb_steal_sock(skb); |
23542618 | 100 | |
c7109986 | 101 | if (sk) |
23542618 | 102 | return sk; |
c7109986 ED |
103 | |
104 | return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo, | |
105 | &ipv6_hdr(skb)->saddr, sport, | |
106 | &ipv6_hdr(skb)->daddr, ntohs(dport), | |
107 | inet6_iif(skb)); | |
9a1f27c4 ACM |
108 | } |
109 | ||
1fd51155 JP |
110 | struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo, |
111 | const struct in6_addr *saddr, const __be16 sport, | |
112 | const struct in6_addr *daddr, const __be16 dport, | |
113 | const int dif); | |
dfd56b8b | 114 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |
505cbfc5 | 115 | #endif /* _INET6_HASHTABLES_H */ |