inet.cc revision 56
1/* 2 * Copyright (c) 2003 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sstream> 30#include <string> 31 32#include "base/cprintf.hh" 33#include "sim/host.hh" 34#include "base/inet.hh" 35 36using namespace::std; 37string 38eaddr_string(const uint8_t a[6]) 39{ 40 stringstream stream; 41 ccprintf(stream, "%x:%x:%x:%x:%x:%x", a[0], a[1], a[2], a[3], a[4], a[5]); 42 43 return stream.str(); 44} 45 46/* 47 * Copyright (c) 1988, 1992, 1993 48 * The Regents of the University of California. All rights reserved. 49 * 50 * Redistribution and use in source and binary forms, with or without 51 * modification, are permitted provided that the following conditions 52 * are met: 53 * 1. Redistributions of source code must retain the above copyright 54 * notice, this list of conditions and the following disclaimer. 55 * 2. Redistributions in binary form must reproduce the above copyright 56 * notice, this list of conditions and the following disclaimer in the 57 * documentation and/or other materials provided with the distribution. 58 * 3. All advertising materials mentioning features or use of this software 59 * must display the following acknowledgement: 60 * This product includes software developed by the University of 61 * California, Berkeley and its contributors. 62 * 4. Neither the name of the University nor the names of its contributors 63 * may be used to endorse or promote products derived from this software 64 * without specific prior written permission. 65 * 66 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 67 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 68 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 69 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 70 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 71 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 72 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 73 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 74 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 75 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 76 * SUCH DAMAGE. 77 */ 78/*********************************************************************** 79 This section of code taken from NetBSD 80***********************************************************************/ 81 82#define ETHER_CRC_POLY_LE 0xedb88320 83#define ETHER_CRC_POLY_BE 0x04c11db6 84 85#if 0 86/* 87 * This is for reference. We have a table-driven version 88 * of the little-endian crc32 generator, which is faster 89 * than the double-loop. 90 */ 91uint32_t 92crc32le(const uint8_t *buf, size_t len) 93{ 94 uint32_t c, crc, carry; 95 size_t i, j; 96 97 crc = 0xffffffffU; /* initial value */ 98 99 for (i = 0; i < len; i++) { 100 c = buf[i]; 101 for (j = 0; j < 8; j++) { 102 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 103 crc >>= 1; 104 c >>= 1; 105 if (carry) 106 crc = (crc ^ ETHER_CRC_POLY_LE); 107 } 108 } 109 110 return (crc); 111} 112#else 113uint32_t 114crc32le(const uint8_t *buf, size_t len) 115{ 116 static const uint32_t crctab[] = { 117 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 118 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 119 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 120 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 121 }; 122 uint32_t crc; 123 int i; 124 125 crc = 0xffffffffU; /* initial value */ 126 127 for (i = 0; i < len; i++) { 128 crc ^= buf[i]; 129 crc = (crc >> 4) ^ crctab[crc & 0xf]; 130 crc = (crc >> 4) ^ crctab[crc & 0xf]; 131 } 132 133 return (crc); 134} 135#endif 136 137uint32_t 138crc32be(const uint8_t *buf, size_t len) 139{ 140 uint32_t c, crc, carry; 141 size_t i, j; 142 143 crc = 0xffffffffU; /* initial value */ 144 145 for (i = 0; i < len; i++) { 146 c = buf[i]; 147 for (j = 0; j < 8; j++) { 148 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 149 crc <<= 1; 150 c >>= 1; 151 if (carry) 152 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 153 } 154 } 155 156 return (crc); 157} 158 159/*********************************************************************** 160 This is the end of the NetBSD code 161***********************************************************************/ 162