| /* |
| * INET An implementation of the TCP/IP protocol suite for the LINUX |
| * operating system. INET is implemented using the BSD Socket |
| * interface as the means of communication with the user level. |
| * |
| * Authors: Lotsa people, from code originally in tcp |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| #ifndef _INET_HASHTABLES_H |
| #define _INET_HASHTABLES_H |
| |
| #include <linux/types.h> |
| |
| static inline int inet_ehashfn(const __u32 laddr, const __u16 lport, |
| const __u32 faddr, const __u16 fport, |
| const int ehash_size) |
| { |
| int h = (laddr ^ lport) ^ (faddr ^ fport); |
| h ^= h >> 16; |
| h ^= h >> 8; |
| return h & (ehash_size - 1); |
| } |
| |
| static inline int inet_sk_ehashfn(const struct sock *sk, const int ehash_size) |
| { |
| const struct inet_sock *inet = inet_sk(sk); |
| const __u32 laddr = inet->rcv_saddr; |
| const __u16 lport = inet->num; |
| const __u32 faddr = inet->daddr; |
| const __u16 fport = inet->dport; |
| |
| return inet_ehashfn(laddr, lport, faddr, fport, ehash_size); |
| } |
| |
| #endif /* _INET_HASHTABLES_H */ |