projects / dragonfly.git / blame
| Commit | Line | Data |
|---|---|---|
| cc85a685 SZ |
1 | /* |
| 2 | * Copyright (c) 2009 The DragonFly Project. All rights reserved. | |
| 3 | * | |
| 4 | * This code is derived from software contributed to The DragonFly Project | |
| 5 | * by Sepherosa Ziehau <sepherosa@gmail.com> | |
| 6 | * | |
| 7 | * Redistribution and use in source and binary forms, with or without | |
| 8 | * modification, are permitted provided that the following conditions | |
| 9 | * are met: | |
| 10 | * | |
| 11 | * 1. Redistributions of source code must retain the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer. | |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 14 | * notice, this list of conditions and the following disclaimer in | |
| 15 | * the documentation and/or other materials provided with the | |
| 16 | * distribution. | |
| 17 | * 3. Neither the name of The DragonFly Project nor the names of its | |
| 18 | * contributors may be used to endorse or promote products derived | |
| 19 | * from this software without specific, prior written permission. | |
| 20 | * | |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 22 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 23 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
| 24 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
| 25 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| 26 | * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
| 27 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 28 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED | |
| 29 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
| 30 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT | |
| 31 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 32 | * SUCH DAMAGE. | |
| 33 | */ | |
| 34 | ||
| 35 | #ifndef _NET_TOEPLITZ2_H_ | |
| 36 | #define _NET_TOEPLITZ2_H_ | |
| 37 | ||
| 38 | #ifndef _KERNEL | |
| 39 | #error "kernel only header file" | |
| 40 | #endif | |
| 41 | ||
| 42 | #define TOEPLITZ_KEYSEED_CNT 2 | |
| 43 | ||
| 44 | extern uint32_t toeplitz_cache[TOEPLITZ_KEYSEED_CNT][256]; | |
| 45 | ||
| 46 | static __inline uint32_t | |
| b73d4152 SZ |
47 | toeplitz_rawhash_addrport(in_addr_t _faddr, in_addr_t _laddr, |
| 48 | in_port_t _fport, in_port_t _lport) | |
| cc85a685 SZ |
49 | { |
| 50 | uint32_t _res; | |
| 51 | ||
| 52 | _res = toeplitz_cache[0][_faddr & 0xff]; | |
| 53 | _res ^= toeplitz_cache[0][(_faddr >> 16) & 0xff]; | |
| 54 | _res ^= toeplitz_cache[0][_laddr & 0xff]; | |
| 55 | _res ^= toeplitz_cache[0][(_laddr >> 16) & 0xff]; | |
| 56 | _res ^= toeplitz_cache[0][_fport & 0xff]; | |
| 57 | _res ^= toeplitz_cache[0][_lport & 0xff]; | |
| 58 | ||
| 59 | _res ^= toeplitz_cache[1][(_faddr >> 8) & 0xff]; | |
| 60 | _res ^= toeplitz_cache[1][(_faddr >> 24) & 0xff]; | |
| 61 | _res ^= toeplitz_cache[1][(_laddr >> 8) & 0xff]; | |
| 62 | _res ^= toeplitz_cache[1][(_laddr >> 24) & 0xff]; | |
| 63 | _res ^= toeplitz_cache[1][(_fport >> 8) & 0xff]; | |
| 64 | _res ^= toeplitz_cache[1][(_lport >> 8) & 0xff]; | |
| 65 | ||
| 66 | return _res; | |
| 67 | } | |
| 68 | ||
| 69 | static __inline uint32_t | |
| b73d4152 | 70 | toeplitz_rawhash_addr(in_addr_t _faddr, in_addr_t _laddr) |
| cc85a685 SZ |
71 | { |
| 72 | uint32_t _res; | |
| 73 | ||
| 74 | _res = toeplitz_cache[0][_faddr & 0xff]; | |
| 75 | _res ^= toeplitz_cache[0][(_faddr >> 16) & 0xff]; | |
| 76 | _res ^= toeplitz_cache[0][_laddr & 0xff]; | |
| 77 | _res ^= toeplitz_cache[0][(_laddr >> 16) & 0xff]; | |
| 78 | ||
| 79 | _res ^= toeplitz_cache[1][(_faddr >> 8) & 0xff]; | |
| 80 | _res ^= toeplitz_cache[1][(_faddr >> 24) & 0xff]; | |
| 81 | _res ^= toeplitz_cache[1][(_laddr >> 8) & 0xff]; | |
| 82 | _res ^= toeplitz_cache[1][(_laddr >> 24) & 0xff]; | |
| 83 | ||
| 84 | return _res; | |
| 85 | } | |
| 86 | ||
| b73d4152 SZ |
87 | static __inline int |
| 88 | toeplitz_hash(uint32_t _rawhash) | |
| 89 | { | |
| a3878651 | 90 | return (_rawhash & 0xffff); |
| b73d4152 SZ |
91 | } |
| 92 | ||
| 36f372d9 MD |
93 | static __inline uint32_t |
| 94 | toeplitz_piecemeal_addr(in_addr_t _faddr) | |
| 95 | { | |
| 96 | uint32_t _res; | |
| 97 | ||
| 98 | _res = toeplitz_cache[0][_faddr & 0xff]; | |
| 99 | _res ^= toeplitz_cache[0][(_faddr >> 16) & 0xff]; | |
| 100 | _res ^= toeplitz_cache[1][(_faddr >> 8) & 0xff]; | |
| 101 | _res ^= toeplitz_cache[1][(_faddr >> 24) & 0xff]; | |
| 102 | return _res; | |
| 103 | } | |
| 104 | ||
| 105 | static __inline uint32_t | |
| 106 | toeplitz_piecemeal_port(in_port_t _fport) | |
| 107 | { | |
| 108 | uint32_t _res; | |
| 109 | ||
| 110 | _res = toeplitz_cache[0][_fport & 0xff]; | |
| 111 | _res ^= toeplitz_cache[1][(_fport >> 8) & 0xff]; | |
| 112 | ||
| 113 | return _res; | |
| 114 | } | |
| 115 | ||
| cc85a685 | 116 | #endif /* !_NET_TOEPLITZ2_H_ */ |