Commit | Line | Data |
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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
505cbfc5 ACM |
2 | /* |
3 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
4 | * operating system. INET is implemented using the BSD Socket | |
5 | * interface as the means of communication with the user level. | |
6 | * | |
7 | * Authors: Lotsa people, from code originally in tcp | |
505cbfc5 ACM |
8 | */ |
9 | ||
10 | #ifndef _INET6_HASHTABLES_H | |
11 | #define _INET6_HASHTABLES_H | |
12 | ||
5324a040 | 13 | |
dfd56b8b | 14 | #if IS_ENABLED(CONFIG_IPV6) |
5324a040 ACM |
15 | #include <linux/in6.h> |
16 | #include <linux/ipv6.h> | |
505cbfc5 | 17 | #include <linux/types.h> |
b3da2cf3 DM |
18 | #include <linux/jhash.h> |
19 | ||
20 | #include <net/inet_sock.h> | |
505cbfc5 | 21 | |
5324a040 | 22 | #include <net/ipv6.h> |
0b441916 | 23 | #include <net/netns/hash.h> |
5324a040 | 24 | |
505cbfc5 ACM |
25 | struct inet_hashinfo; |
26 | ||
b50026b5 HFS |
27 | static inline unsigned int __inet6_ehashfn(const u32 lhash, |
28 | const u16 lport, | |
29 | const u32 fhash, | |
30 | const __be16 fport, | |
31 | const u32 initval) | |
5324a040 | 32 | { |
b50026b5 HFS |
33 | const u32 ports = (((u32)lport) << 16) | (__force u32)fport; |
34 | return jhash_3words(lhash, fhash, ports, initval); | |
5324a040 ACM |
35 | } |
36 | ||
37 | /* | |
38 | * Sockets in TCP_CLOSE state are _always_ taken out of the hash, so | |
39 | * we need not check it for TCP lookups anymore, thanks Alexey. -DaveM | |
40 | * | |
41 | * The sockhash lock must be held as a reader here. | |
42 | */ | |
1fd51155 JP |
43 | struct sock *__inet6_lookup_established(struct net *net, |
44 | struct inet_hashinfo *hashinfo, | |
45 | const struct in6_addr *saddr, | |
46 | const __be16 sport, | |
47 | const struct in6_addr *daddr, | |
4297a0ef DA |
48 | const u16 hnum, const int dif, |
49 | const int sdif); | |
1fd51155 JP |
50 | |
51 | struct sock *inet6_lookup_listener(struct net *net, | |
52 | struct inet_hashinfo *hashinfo, | |
a583636a | 53 | struct sk_buff *skb, int doff, |
1fd51155 JP |
54 | const struct in6_addr *saddr, |
55 | const __be16 sport, | |
56 | const struct in6_addr *daddr, | |
4297a0ef DA |
57 | const unsigned short hnum, |
58 | const int dif, const int sdif); | |
5324a040 | 59 | |
d86e0dac PE |
60 | static inline struct sock *__inet6_lookup(struct net *net, |
61 | struct inet_hashinfo *hashinfo, | |
a583636a | 62 | struct sk_buff *skb, int doff, |
5324a040 | 63 | const struct in6_addr *saddr, |
d2ecd9cc | 64 | const __be16 sport, |
5324a040 ACM |
65 | const struct in6_addr *daddr, |
66 | const u16 hnum, | |
4297a0ef | 67 | const int dif, const int sdif, |
3b24d854 | 68 | bool *refcounted) |
5324a040 | 69 | { |
d86e0dac | 70 | struct sock *sk = __inet6_lookup_established(net, hashinfo, saddr, |
4297a0ef DA |
71 | sport, daddr, hnum, |
72 | dif, sdif); | |
3b24d854 | 73 | *refcounted = true; |
5324a040 ACM |
74 | if (sk) |
75 | return sk; | |
3b24d854 | 76 | *refcounted = false; |
a583636a | 77 | return inet6_lookup_listener(net, hashinfo, skb, doff, saddr, sport, |
4297a0ef | 78 | daddr, hnum, dif, sdif); |
5324a040 ACM |
79 | } |
80 | ||
9a1f27c4 | 81 | static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo, |
a583636a | 82 | struct sk_buff *skb, int doff, |
9a1f27c4 | 83 | const __be16 sport, |
870c3151 | 84 | const __be16 dport, |
4297a0ef | 85 | int iif, int sdif, |
3b24d854 | 86 | bool *refcounted) |
9a1f27c4 | 87 | { |
71489e21 | 88 | struct sock *sk = skb_steal_sock(skb, refcounted); |
23542618 | 89 | |
c7109986 | 90 | if (sk) |
23542618 | 91 | return sk; |
c7109986 | 92 | |
a583636a CG |
93 | return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo, skb, |
94 | doff, &ipv6_hdr(skb)->saddr, sport, | |
c7109986 | 95 | &ipv6_hdr(skb)->daddr, ntohs(dport), |
4297a0ef | 96 | iif, sdif, refcounted); |
9a1f27c4 ACM |
97 | } |
98 | ||
1fd51155 | 99 | struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo, |
a583636a | 100 | struct sk_buff *skb, int doff, |
1fd51155 JP |
101 | const struct in6_addr *saddr, const __be16 sport, |
102 | const struct in6_addr *daddr, const __be16 dport, | |
103 | const int dif); | |
496611d7 CG |
104 | |
105 | int inet6_hash(struct sock *sk); | |
25de4668 | 106 | |
5d368f03 ED |
107 | static inline bool inet6_match(struct net *net, const struct sock *sk, |
108 | const struct in6_addr *saddr, | |
109 | const struct in6_addr *daddr, | |
110 | const __portpair ports, | |
111 | const int dif, const int sdif) | |
112 | { | |
5d368f03 ED |
113 | if (!net_eq(sock_net(sk), net) || |
114 | sk->sk_family != AF_INET6 || | |
115 | sk->sk_portpair != ports || | |
116 | !ipv6_addr_equal(&sk->sk_v6_daddr, saddr) || | |
117 | !ipv6_addr_equal(&sk->sk_v6_rcv_saddr, daddr)) | |
118 | return false; | |
119 | ||
944fd1ae MM |
120 | /* READ_ONCE() paired with WRITE_ONCE() in sock_bindtoindex_locked() */ |
121 | return inet_sk_bound_dev_eq(net, READ_ONCE(sk->sk_bound_dev_if), dif, | |
122 | sdif); | |
5d368f03 ED |
123 | } |
124 | #endif /* IS_ENABLED(CONFIG_IPV6) */ | |
25de4668 | 125 | |
505cbfc5 | 126 | #endif /* _INET6_HASHTABLES_H */ |