41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _INET_HASHTABLES_H
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#define _INET_HASHTABLES_H
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#include <linux/types.h>
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static inline int inet_ehashfn(const __u32 laddr, const __u16 lport,
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const __u32 faddr, const __u16 fport,
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const int ehash_size)
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{
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int h = (laddr ^ lport) ^ (faddr ^ fport);
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h ^= h >> 16;
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h ^= h >> 8;
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return h & (ehash_size - 1);
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}
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static inline int inet_sk_ehashfn(const struct sock *sk, const int ehash_size)
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{
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const struct inet_sock *inet = inet_sk(sk);
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const __u32 laddr = inet->rcv_saddr;
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const __u16 lport = inet->num;
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const __u32 faddr = inet->daddr;
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const __u16 fport = inet->dport;
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return inet_ehashfn(laddr, lport, faddr, fport, ehash_size);
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}
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#endif /* _INET_HASHTABLES_H */
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