projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 505cbfc5 ACM |
1 | /* |
| 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. | |
| 5 | * | |
| 6 | * Authors: Lotsa people, from code originally in tcp | |
| 7 | * | |
| 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. | |
| 12 | */ | |
| 13 | ||
| 14 | #ifndef _INET6_HASHTABLES_H | |
| 15 | #define _INET6_HASHTABLES_H | |
| 16 | ||
| 5324a040 ACM |
17 | |
| 18 | #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) | |
| 19 | #include <linux/in6.h> | |
| 20 | #include <linux/ipv6.h> | |
| 505cbfc5 ACM |
21 | #include <linux/types.h> |
| 22 | ||
| 5324a040 ACM |
23 | #include <net/ipv6.h> |
| 24 | ||
| 505cbfc5 ACM |
25 | struct inet_hashinfo; |
| 26 | ||
| 5324a040 | 27 | /* I have no idea if this is a good hash for v6 or not. -DaveM */ |
| 81c3d547 ED |
28 | static inline unsigned int inet6_ehashfn(const struct in6_addr *laddr, const u16 lport, |
| 29 | const struct in6_addr *faddr, const u16 fport) | |
| 5324a040 | 30 | { |
| 81c3d547 | 31 | unsigned int hashent = (lport ^ fport); |
| 5324a040 ACM |
32 | |
| 33 | hashent ^= (laddr->s6_addr32[3] ^ faddr->s6_addr32[3]); | |
| 34 | hashent ^= hashent >> 16; | |
| 35 | hashent ^= hashent >> 8; | |
| 81c3d547 | 36 | return hashent; |
| 5324a040 ACM |
37 | } |
| 38 | ||
| 81c3d547 | 39 | static inline int inet6_sk_ehashfn(const struct sock *sk) |
| 5324a040 ACM |
40 | { |
| 41 | const struct inet_sock *inet = inet_sk(sk); | |
| 42 | const struct ipv6_pinfo *np = inet6_sk(sk); | |
| 43 | const struct in6_addr *laddr = &np->rcv_saddr; | |
| 44 | const struct in6_addr *faddr = &np->daddr; | |
| 45 | const __u16 lport = inet->num; | |
| 46 | const __u16 fport = inet->dport; | |
| 81c3d547 | 47 | return inet6_ehashfn(laddr, lport, faddr, fport); |
| 5324a040 ACM |
48 | } |
| 49 | ||
| b1a7ffcb | 50 | extern void __inet6_hash(struct inet_hashinfo *hashinfo, struct sock *sk); |
| 90b19d31 | 51 | |
| 5324a040 ACM |
52 | /* |
| 53 | * Sockets in TCP_CLOSE state are _always_ taken out of the hash, so | |
| 54 | * we need not check it for TCP lookups anymore, thanks Alexey. -DaveM | |
| 55 | * | |
| 56 | * The sockhash lock must be held as a reader here. | |
| 57 | */ | |
| b1a7ffcb | 58 | extern struct sock *__inet6_lookup_established(struct inet_hashinfo *hashinfo, |
| 5324a040 ACM |
59 | const struct in6_addr *saddr, |
| 60 | const u16 sport, | |
| 61 | const struct in6_addr *daddr, | |
| 62 | const u16 hnum, | |
| b1a7ffcb | 63 | const int dif); |
| 5324a040 ACM |
64 | |
| 65 | extern struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo, | |
| 66 | const struct in6_addr *daddr, | |
| 67 | const unsigned short hnum, | |
| 68 | const int dif); | |
| 69 | ||
| 70 | static inline struct sock *__inet6_lookup(struct inet_hashinfo *hashinfo, | |
| 71 | const struct in6_addr *saddr, | |
| 72 | const u16 sport, | |
| 73 | const struct in6_addr *daddr, | |
| 74 | const u16 hnum, | |
| 75 | const int dif) | |
| 76 | { | |
| 77 | struct sock *sk = __inet6_lookup_established(hashinfo, saddr, sport, | |
| 78 | daddr, hnum, dif); | |
| 79 | if (sk) | |
| 80 | return sk; | |
| 81 | ||
| 82 | return inet6_lookup_listener(hashinfo, daddr, hnum, dif); | |
| 83 | } | |
| 84 | ||
| 505cbfc5 ACM |
85 | extern struct sock *inet6_lookup(struct inet_hashinfo *hashinfo, |
| 86 | const struct in6_addr *saddr, const u16 sport, | |
| 87 | const struct in6_addr *daddr, const u16 dport, | |
| 88 | const int dif); | |
| 5324a040 | 89 | #endif /* defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE) */ |
| 505cbfc5 | 90 | #endif /* _INET6_HASHTABLES_H */ |