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comparison: nsprpub/pr/src/misc/praton.c
nsprpub/pr/src/misc/praton.c
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| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /******************************************************************************* | |
| 3 * The following function pr_inet_aton is based on the BSD function inet_aton | |
| 4 * with some modifications. The license and copyright notices applying to this | |
| 5 * function appear below. Modifications are also according to the license below. | |
| 6 ******************************************************************************/ | |
| 7 | |
| 8 #include "prnetdb.h" | |
| 9 | |
| 10 /* | |
| 11 * Copyright (c) 1983, 1990, 1993 | |
| 12 * The Regents of the University of California. All rights reserved. | |
| 13 * | |
| 14 * Redistribution and use in source and binary forms, with or without | |
| 15 * modification, are permitted provided that the following conditions | |
| 16 * are met: | |
| 17 * 1. Redistributions of source code must retain the above copyright | |
| 18 * notice, this list of conditions and the following disclaimer. | |
| 19 * 2. Redistributions in binary form must reproduce the above copyright | |
| 20 * notice, this list of conditions and the following disclaimer in the | |
| 21 * documentation and/or other materials provided with the distribution. | |
| 22 * 4. Neither the name of the University nor the names of its contributors | |
| 23 * may be used to endorse or promote products derived from this software | |
| 24 * without specific prior written permission. | |
| 25 * | |
| 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 36 * SUCH DAMAGE. | |
| 37 */ | |
| 38 | |
| 39 /* | |
| 40 * Portions Copyright (c) 1993 by Digital Equipment Corporation. | |
| 41 * | |
| 42 * Permission to use, copy, modify, and distribute this software for any | |
| 43 * purpose with or without fee is hereby granted, provided that the above | |
| 44 * copyright notice and this permission notice appear in all copies, and that | |
| 45 * the name of Digital Equipment Corporation not be used in advertising or | |
| 46 * publicity pertaining to distribution of the document or software without | |
| 47 * specific, written prior permission. | |
| 48 * | |
| 49 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL | |
| 50 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES | |
| 51 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT | |
| 52 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL | |
| 53 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR | |
| 54 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS | |
| 55 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
| 56 * SOFTWARE. | |
| 57 */ | |
| 58 | |
| 59 /* | |
| 60 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") | |
| 61 * Portions Copyright (c) 1996-1999 by Internet Software Consortium. | |
| 62 * | |
| 63 * Permission to use, copy, modify, and distribute this software for any | |
| 64 * purpose with or without fee is hereby granted, provided that the above | |
| 65 * copyright notice and this permission notice appear in all copies. | |
| 66 * | |
| 67 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES | |
| 68 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
| 69 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR | |
| 70 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 71 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 72 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | |
| 73 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 74 */ | |
| 75 | |
| 76 #define XX 127 | |
| 77 static const unsigned char index_hex[256] = { | |
| 78 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 79 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 80 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 81 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,XX,XX, XX,XX,XX,XX, | |
| 82 XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 83 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 84 XX,10,11,12, 13,14,15,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 85 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 86 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 87 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 88 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 89 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 90 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 91 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 92 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 93 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, | |
| 94 }; | |
| 95 | |
| 96 static PRBool _isdigit(char c) { return c >= '0' && c <= '9'; } | |
| 97 static PRBool _isxdigit(char c) { return index_hex[(unsigned char) c] != XX; } | |
| 98 static PRBool _isspace(char c) { return c == ' ' || (c >= '\t' && c <= '\r'); } | |
| 99 #undef XX | |
| 100 | |
| 101 int | |
| 102 pr_inet_aton(const char *cp, PRUint32 *addr) | |
| 103 { | |
| 104 PRUint32 val; | |
| 105 int base, n; | |
| 106 char c; | |
| 107 PRUint8 parts[4]; | |
| 108 PRUint8 *pp = parts; | |
| 109 int digit; | |
| 110 | |
| 111 c = *cp; | |
| 112 for (;;) { | |
| 113 /* | |
| 114 * Collect number up to ``.''. | |
| 115 * Values are specified as for C: | |
| 116 * 0x=hex, 0=octal, isdigit=decimal. | |
| 117 */ | |
| 118 if (!_isdigit(c)) | |
| 119 return (0); | |
| 120 val = 0; base = 10; digit = 0; | |
| 121 if (c == '0') { | |
| 122 c = *++cp; | |
| 123 if (c == 'x' || c == 'X') | |
| 124 base = 16, c = *++cp; | |
| 125 else { | |
| 126 base = 8; | |
| 127 digit = 1; | |
| 128 } | |
| 129 } | |
| 130 for (;;) { | |
| 131 if (_isdigit(c)) { | |
| 132 if (base == 8 && (c == '8' || c == '9')) | |
| 133 return (0); | |
| 134 val = (val * base) + (c - '0'); | |
| 135 c = *++cp; | |
| 136 digit = 1; | |
| 137 } else if (base == 16 && _isxdigit(c)) { | |
| 138 val = (val << 4) + index_hex[(unsigned char) c]; | |
| 139 c = *++cp; | |
| 140 digit = 1; | |
| 141 } else | |
| 142 break; | |
| 143 } | |
| 144 if (c == '.') { | |
| 145 /* | |
| 146 * Internet format: | |
| 147 * a.b.c.d | |
| 148 * a.b.c (with c treated as 16 bits) | |
| 149 * a.b (with b treated as 24 bits) | |
| 150 */ | |
| 151 if (pp >= parts + 3 || val > 0xffU) | |
| 152 return (0); | |
| 153 *pp++ = val; | |
| 154 c = *++cp; | |
| 155 } else | |
| 156 break; | |
| 157 } | |
| 158 /* | |
| 159 * Check for trailing characters. | |
| 160 */ | |
| 161 if (c != '\0' && !_isspace(c)) | |
| 162 return (0); | |
| 163 /* | |
| 164 * Did we get a valid digit? | |
| 165 */ | |
| 166 if (!digit) | |
| 167 return (0); | |
| 168 /* | |
| 169 * Concoct the address according to | |
| 170 * the number of parts specified. | |
| 171 */ | |
| 172 n = pp - parts + 1; | |
| 173 switch (n) { | |
| 174 case 1: /*%< a -- 32 bits */ | |
| 175 break; | |
| 176 | |
| 177 case 2: /*%< a.b -- 8.24 bits */ | |
| 178 if (val > 0xffffffU) | |
| 179 return (0); | |
| 180 val |= parts[0] << 24; | |
| 181 break; | |
| 182 | |
| 183 case 3: /*%< a.b.c -- 8.8.16 bits */ | |
| 184 if (val > 0xffffU) | |
| 185 return (0); | |
| 186 val |= (parts[0] << 24) | (parts[1] << 16); | |
| 187 break; | |
| 188 | |
| 189 case 4: /*%< a.b.c.d -- 8.8.8.8 bits */ | |
| 190 if (val > 0xffU) | |
| 191 return (0); | |
| 192 val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8); | |
| 193 break; | |
| 194 } | |
| 195 *addr = PR_htonl(val); | |
| 196 return (1); | |
| 197 } | |
| 198 |
