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 */
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