Commit | Line | Data |
---|---|---|
304a1618 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 _INET_HASHTABLES_H | |
15 | #define _INET_HASHTABLES_H | |
16 | ||
17 | #include <linux/types.h> | |
18 | ||
19 | static inline int inet_ehashfn(const __u32 laddr, const __u16 lport, | |
20 | const __u32 faddr, const __u16 fport, | |
21 | const int ehash_size) | |
22 | { | |
23 | int h = (laddr ^ lport) ^ (faddr ^ fport); | |
24 | h ^= h >> 16; | |
25 | h ^= h >> 8; | |
26 | return h & (ehash_size - 1); | |
27 | } | |
28 | ||
29 | static inline int inet_sk_ehashfn(const struct sock *sk, const int ehash_size) | |
30 | { | |
31 | const struct inet_sock *inet = inet_sk(sk); | |
32 | const __u32 laddr = inet->rcv_saddr; | |
33 | const __u16 lport = inet->num; | |
34 | const __u32 faddr = inet->daddr; | |
35 | const __u16 fport = inet->dport; | |
36 | ||
37 | return inet_ehashfn(laddr, lport, faddr, fport, ehash_size); | |
38 | } | |
39 | ||
40 | #endif /* _INET_HASHTABLES_H */ |