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.
6 * Authors: Lotsa people, from code originally in tcp
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.
14 #ifndef _INET6_HASHTABLES_H
15 #define _INET6_HASHTABLES_H
18 #if IS_ENABLED(CONFIG_IPV6)
19 #include <linux/in6.h>
20 #include <linux/ipv6.h>
21 #include <linux/types.h>
22 #include <linux/jhash.h>
24 #include <net/inet_sock.h>
27 #include <net/netns/hash.h>
31 static inline unsigned int __inet6_ehashfn(const u32 lhash,
37 const u32 ports = (((u32)lport) << 16) | (__force u32)fport;
38 return jhash_3words(lhash, fhash, ports, initval);
41 int __inet6_hash(struct sock *sk, struct inet_timewait_sock *twp);
44 * Sockets in TCP_CLOSE state are _always_ taken out of the hash, so
45 * we need not check it for TCP lookups anymore, thanks Alexey. -DaveM
47 * The sockhash lock must be held as a reader here.
49 struct sock *__inet6_lookup_established(struct net *net,
50 struct inet_hashinfo *hashinfo,
51 const struct in6_addr *saddr,
53 const struct in6_addr *daddr,
54 const u16 hnum, const int dif);
56 struct sock *inet6_lookup_listener(struct net *net,
57 struct inet_hashinfo *hashinfo,
58 const struct in6_addr *saddr,
60 const struct in6_addr *daddr,
61 const unsigned short hnum, const int dif);
63 static inline struct sock *__inet6_lookup(struct net *net,
64 struct inet_hashinfo *hashinfo,
65 const struct in6_addr *saddr,
67 const struct in6_addr *daddr,
71 struct sock *sk = __inet6_lookup_established(net, hashinfo, saddr,
72 sport, daddr, hnum, dif);
76 return inet6_lookup_listener(net, hashinfo, saddr, sport,
80 static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
85 struct sock *sk = skb_steal_sock(skb);
90 return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo,
91 &ipv6_hdr(skb)->saddr, sport,
92 &ipv6_hdr(skb)->daddr, ntohs(dport),
96 struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo,
97 const struct in6_addr *saddr, const __be16 sport,
98 const struct in6_addr *daddr, const __be16 dport,
100 #endif /* IS_ENABLED(CONFIG_IPV6) */
101 #endif /* _INET6_HASHTABLES_H */