2019-05-27 00:55:01 -06:00
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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2005-08-12 06:19:38 -06:00
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/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Authors: Lotsa people, from code originally in tcp
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*/
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#ifndef _INET6_HASHTABLES_H
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#define _INET6_HASHTABLES_H
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2005-08-12 06:26:18 -06:00
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2011-12-10 02:48:31 -07:00
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#if IS_ENABLED(CONFIG_IPV6)
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2005-08-12 06:26:18 -06:00
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#include <linux/in6.h>
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#include <linux/ipv6.h>
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#include <linux/types.h>
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2007-03-23 12:40:27 -06:00
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#include <linux/jhash.h>
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#include <net/inet_sock.h>
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2005-08-12 06:19:38 -06:00
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2005-08-12 06:26:18 -06:00
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#include <net/ipv6.h>
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2008-06-16 18:14:11 -06:00
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#include <net/netns/hash.h>
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2005-08-12 06:19:38 -06:00
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struct inet_hashinfo;
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2013-10-19 13:48:52 -06:00
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static inline unsigned int __inet6_ehashfn(const u32 lhash,
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const u16 lport,
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const u32 fhash,
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const __be16 fport,
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const u32 initval)
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{
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const u32 ports = (((u32)lport) << 16) | (__force u32)fport;
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return jhash_3words(lhash, fhash, ports, initval);
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2005-08-12 06:26:18 -06:00
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}
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/*
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* Sockets in TCP_CLOSE state are _always_ taken out of the hash, so
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* we need not check it for TCP lookups anymore, thanks Alexey. -DaveM
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*
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* The sockhash lock must be held as a reader here.
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*/
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2013-09-21 11:22:41 -06:00
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struct sock *__inet6_lookup_established(struct net *net,
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struct inet_hashinfo *hashinfo,
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const struct in6_addr *saddr,
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const __be16 sport,
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const struct in6_addr *daddr,
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2017-08-07 09:44:21 -06:00
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const u16 hnum, const int dif,
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const int sdif);
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struct sock *inet6_lookup_listener(struct net *net,
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struct inet_hashinfo *hashinfo,
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struct sk_buff *skb, int doff,
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const struct in6_addr *saddr,
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const __be16 sport,
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const struct in6_addr *daddr,
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const unsigned short hnum,
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const int dif, const int sdif);
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2008-01-31 06:07:21 -07:00
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static inline struct sock *__inet6_lookup(struct net *net,
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struct inet_hashinfo *hashinfo,
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struct sk_buff *skb, int doff,
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const struct in6_addr *saddr,
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2006-11-08 01:20:00 -07:00
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const __be16 sport,
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const struct in6_addr *daddr,
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const u16 hnum,
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const int dif, const int sdif,
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bool *refcounted)
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{
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struct sock *sk = __inet6_lookup_established(net, hashinfo, saddr,
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sport, daddr, hnum,
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dif, sdif);
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*refcounted = true;
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if (sk)
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return sk;
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*refcounted = false;
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2016-02-10 09:50:38 -07:00
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return inet6_lookup_listener(net, hashinfo, skb, doff, saddr, sport,
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daddr, hnum, dif, sdif);
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}
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2008-10-07 12:41:57 -06:00
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static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
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struct sk_buff *skb, int doff,
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const __be16 sport,
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const __be16 dport,
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int iif, int sdif,
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bool *refcounted)
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{
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struct sock *sk = skb_steal_sock(skb);
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2008-10-07 13:41:01 -06:00
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2016-04-01 09:52:17 -06:00
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*refcounted = true;
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if (sk)
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return sk;
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2012-07-26 06:18:11 -06:00
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2016-02-10 09:50:38 -07:00
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return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo, skb,
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doff, &ipv6_hdr(skb)->saddr, sport,
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&ipv6_hdr(skb)->daddr, ntohs(dport),
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iif, sdif, refcounted);
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}
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2013-09-21 11:22:41 -06:00
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struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo,
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2016-02-10 09:50:38 -07:00
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struct sk_buff *skb, int doff,
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const struct in6_addr *saddr, const __be16 sport,
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const struct in6_addr *daddr, const __be16 dport,
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const int dif);
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2016-02-10 09:50:36 -07:00
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int inet6_hash(struct sock *sk);
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2011-12-10 02:48:31 -07:00
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#endif /* IS_ENABLED(CONFIG_IPV6) */
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2014-11-04 11:59:47 -07:00
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2017-08-07 09:44:21 -06:00
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#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif, __sdif) \
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(((__sk)->sk_portpair == (__ports)) && \
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((__sk)->sk_family == AF_INET6) && \
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ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \
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ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \
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(((__sk)->sk_bound_dev_if == (__dif)) || \
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((__sk)->sk_bound_dev_if == (__sdif))) && \
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2014-11-04 11:59:47 -07:00
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net_eq(sock_net(__sk), (__net)))
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2005-08-12 06:19:38 -06:00
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#endif /* _INET6_HASHTABLES_H */
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