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117 lines
3.4 KiB
117 lines
3.4 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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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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#if IS_ENABLED(CONFIG_IPV6) |
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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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#include <linux/jhash.h> |
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#include <net/inet_sock.h> |
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#include <net/ipv6.h> |
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#include <net/netns/hash.h> |
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struct inet_hashinfo; |
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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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} |
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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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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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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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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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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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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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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, refcounted); |
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if (sk) |
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return sk; |
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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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struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo, |
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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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int inet6_hash(struct sock *sk); |
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#endif /* IS_ENABLED(CONFIG_IPV6) */ |
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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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net_eq(sock_net(__sk), (__net))) |
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#endif /* _INET6_HASHTABLES_H */
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