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1/* SPDX-License-Identifier: GPL-2.0-or-later */
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
8 */
9
10#ifndef _INET6_HASHTABLES_H
11#define _INET6_HASHTABLES_H
12
13
14#if IS_ENABLED(CONFIG_IPV6)
15#include <linux/in6.h>
16#include <linux/ipv6.h>
17#include <linux/types.h>
18#include <linux/jhash.h>
19
20#include <net/inet_sock.h>
21
22#include <net/ipv6.h>
23#include <net/netns/hash.h>
24
25struct inet_hashinfo;
26
27static inline unsigned int __inet6_ehashfn(const u32 lhash,
28 const u16 lport,
29 const u32 fhash,
30 const __be16 fport,
31 const u32 initval)
32{
33 const u32 ports = (((u32)lport) << 16) | (__force u32)fport;
34 return jhash_3words(lhash, fhash, ports, initval);
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 */
43struct 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,
48 const u16 hnum, const int dif,
49 const int sdif);
50
51struct sock *inet6_lookup_listener(struct net *net,
52 struct inet_hashinfo *hashinfo,
53 struct sk_buff *skb, int doff,
54 const struct in6_addr *saddr,
55 const __be16 sport,
56 const struct in6_addr *daddr,
57 const unsigned short hnum,
58 const int dif, const int sdif);
59
60static inline struct sock *__inet6_lookup(struct net *net,
61 struct inet_hashinfo *hashinfo,
62 struct sk_buff *skb, int doff,
63 const struct in6_addr *saddr,
64 const __be16 sport,
65 const struct in6_addr *daddr,
66 const u16 hnum,
67 const int dif, const int sdif,
68 bool *refcounted)
69{
70 struct sock *sk = __inet6_lookup_established(net, hashinfo, saddr,
71 sport, daddr, hnum,
72 dif, sdif);
73 *refcounted = true;
74 if (sk)
75 return sk;
76 *refcounted = false;
77 return inet6_lookup_listener(net, hashinfo, skb, doff, saddr, sport,
78 daddr, hnum, dif, sdif);
79}
80
81static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
82 struct sk_buff *skb, int doff,
83 const __be16 sport,
84 const __be16 dport,
85 int iif, int sdif,
86 bool *refcounted)
87{
88 struct sock *sk = skb_steal_sock(skb);
89
90 *refcounted = true;
91 if (sk)
92 return sk;
93
94 return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo, skb,
95 doff, &ipv6_hdr(skb)->saddr, sport,
96 &ipv6_hdr(skb)->daddr, ntohs(dport),
97 iif, sdif, refcounted);
98}
99
100struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo,
101 struct sk_buff *skb, int doff,
102 const struct in6_addr *saddr, const __be16 sport,
103 const struct in6_addr *daddr, const __be16 dport,
104 const int dif);
105
106int inet6_hash(struct sock *sk);
107#endif /* IS_ENABLED(CONFIG_IPV6) */
108
109#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif, __sdif) \
110 (((__sk)->sk_portpair == (__ports)) && \
111 ((__sk)->sk_family == AF_INET6) && \
112 ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \
113 ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \
114 (((__sk)->sk_bound_dev_if == (__dif)) || \
115 ((__sk)->sk_bound_dev_if == (__sdif))) && \
116 net_eq(sock_net(__sk), (__net)))
117
118#endif /* _INET6_HASHTABLES_H */
1/* SPDX-License-Identifier: GPL-2.0-or-later */
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
8 */
9
10#ifndef _INET6_HASHTABLES_H
11#define _INET6_HASHTABLES_H
12
13
14#if IS_ENABLED(CONFIG_IPV6)
15#include <linux/in6.h>
16#include <linux/ipv6.h>
17#include <linux/types.h>
18#include <linux/jhash.h>
19
20#include <net/inet_sock.h>
21
22#include <net/ipv6.h>
23#include <net/netns/hash.h>
24
25struct inet_hashinfo;
26
27static inline unsigned int __inet6_ehashfn(const u32 lhash,
28 const u16 lport,
29 const u32 fhash,
30 const __be16 fport,
31 const u32 initval)
32{
33 const u32 ports = (((u32)lport) << 16) | (__force u32)fport;
34 return jhash_3words(lhash, fhash, ports, initval);
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 */
43struct 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,
48 const u16 hnum, const int dif,
49 const int sdif);
50
51struct sock *inet6_lookup_listener(struct net *net,
52 struct inet_hashinfo *hashinfo,
53 struct sk_buff *skb, int doff,
54 const struct in6_addr *saddr,
55 const __be16 sport,
56 const struct in6_addr *daddr,
57 const unsigned short hnum,
58 const int dif, const int sdif);
59
60static inline struct sock *__inet6_lookup(struct net *net,
61 struct inet_hashinfo *hashinfo,
62 struct sk_buff *skb, int doff,
63 const struct in6_addr *saddr,
64 const __be16 sport,
65 const struct in6_addr *daddr,
66 const u16 hnum,
67 const int dif, const int sdif,
68 bool *refcounted)
69{
70 struct sock *sk = __inet6_lookup_established(net, hashinfo, saddr,
71 sport, daddr, hnum,
72 dif, sdif);
73 *refcounted = true;
74 if (sk)
75 return sk;
76 *refcounted = false;
77 return inet6_lookup_listener(net, hashinfo, skb, doff, saddr, sport,
78 daddr, hnum, dif, sdif);
79}
80
81static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
82 struct sk_buff *skb, int doff,
83 const __be16 sport,
84 const __be16 dport,
85 int iif, int sdif,
86 bool *refcounted)
87{
88 struct sock *sk = skb_steal_sock(skb, refcounted);
89
90 if (sk)
91 return sk;
92
93 return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo, skb,
94 doff, &ipv6_hdr(skb)->saddr, sport,
95 &ipv6_hdr(skb)->daddr, ntohs(dport),
96 iif, sdif, refcounted);
97}
98
99struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo,
100 struct sk_buff *skb, int doff,
101 const struct in6_addr *saddr, const __be16 sport,
102 const struct in6_addr *daddr, const __be16 dport,
103 const int dif);
104
105int inet6_hash(struct sock *sk);
106#endif /* IS_ENABLED(CONFIG_IPV6) */
107
108#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif, __sdif) \
109 (((__sk)->sk_portpair == (__ports)) && \
110 ((__sk)->sk_family == AF_INET6) && \
111 ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \
112 ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \
113 (((__sk)->sk_bound_dev_if == (__dif)) || \
114 ((__sk)->sk_bound_dev_if == (__sdif))) && \
115 net_eq(sock_net(__sk), (__net)))
116
117#endif /* _INET6_HASHTABLES_H */