1 /* 2 * Copyright (c) 1996 by Internet Software Consortium. 3 * 4 * Permission to use, copy, modify, and distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS 9 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES 10 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE 11 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 12 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 13 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 14 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 15 * SOFTWARE. 16 */ 17 18 /* 19 * Portions copyright (c) 1999, 2000 20 * Intel Corporation. 21 * All rights reserved. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 27 * 1. Redistributions of source code must retain the above copyright 28 * notice, this list of conditions and the following disclaimer. 29 * 30 * 2. Redistributions in binary form must reproduce the above copyright 31 * notice, this list of conditions and the following disclaimer in the 32 * documentation and/or other materials provided with the distribution. 33 * 34 * 3. All advertising materials mentioning features or use of this software 35 * must display the following acknowledgement: 36 * 37 * This product includes software developed by Intel Corporation and 38 * its contributors. 39 * 40 * 4. Neither the name of Intel Corporation or its contributors may be 41 * used to endorse or promote products derived from this software 42 * without specific prior written permission. 43 * 44 * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS'' 45 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 47 * ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE 48 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 49 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 50 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 51 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 52 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 53 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 54 * THE POSSIBILITY OF SUCH DAMAGE. 55 * 56 */ 57 58 /* Import. */ 59 60 #include <arpa/nameser.h> 61 62 #include <ctype.h> 63 #include <errno.h> 64 #include <stdio.h> 65 #include <string.h> 66 67 #define SPRINTF(x) ((size_t)sprintf x) 68 69 /* Forward. */ 70 71 static int fmt1(int t, char s, char **buf, size_t *buflen); 72 73 /* Macros. */ 74 75 #define T(x) if ((x) < 0) return (-1); else (void)NULL 76 77 /* Public. */ 78 79 int 80 ns_format_ttl(u_long src, char *dst, size_t dstlen) { 81 char *odst = dst; 82 int secs, mins, hours, days, weeks, x; 83 char *p; 84 85 secs = (int)(src % 60); src /= 60; 86 mins = (int)(src % 60); src /= 60; 87 hours = (int)(src % 24); src /= 24; 88 days = (int)(src % 7); src /= 7; 89 weeks = (int)src; src = 0; 90 91 x = 0; 92 if (weeks) { 93 T(fmt1(weeks, 'W', &dst, &dstlen)); 94 x++; 95 } 96 if (days) { 97 T(fmt1(days, 'D', &dst, &dstlen)); 98 x++; 99 } 100 if (hours) { 101 T(fmt1(hours, 'H', &dst, &dstlen)); 102 x++; 103 } 104 if (mins) { 105 T(fmt1(mins, 'M', &dst, &dstlen)); 106 x++; 107 } 108 if (secs || !(weeks || days || hours || mins)) { 109 T(fmt1(secs, 'S', &dst, &dstlen)); 110 x++; 111 } 112 113 if (x > 1) { 114 int ch; 115 116 for (p = odst; (ch = *p) != '\0'; p++) 117 if (isascii(ch) && isupper(ch)) 118 *p = (char)( tolower(ch)); 119 } 120 121 return ((int)(dst - odst)); 122 } 123 124 int 125 ns_parse_ttl(const char *src, u_long *dst) { 126 u_long ttl, tmp; 127 int ch, digits, dirty; 128 129 ttl = 0; 130 tmp = 0; 131 digits = 0; 132 dirty = 0; 133 while ((ch = *src++) != '\0') { 134 if (!isascii(ch) || !isprint(ch)) 135 goto einval; 136 if (isdigit(ch)) { 137 tmp *= 10; 138 tmp += (ch - '0'); 139 digits++; 140 continue; 141 } 142 if (digits == 0) 143 goto einval; 144 if (islower(ch)) 145 ch = toupper(ch); 146 switch (ch) { 147 case 'W': tmp *= 7; 148 case 'D': tmp *= 24; 149 case 'H': tmp *= 60; 150 case 'M': tmp *= 60; 151 case 'S': break; 152 default: goto einval; 153 } 154 ttl += tmp; 155 tmp = 0; 156 digits = 0; 157 dirty = 1; 158 } 159 if (digits > 0) { 160 if (dirty) 161 goto einval; 162 else 163 ttl += tmp; 164 } 165 *dst = ttl; 166 return (0); 167 168 einval: 169 errno = EINVAL; 170 return (-1); 171 } 172 173 /* Private. */ 174 175 static int 176 fmt1(int t, char s, char **buf, size_t *buflen) { 177 char tmp[50]; 178 size_t len; 179 180 len = SPRINTF((tmp, "%d%c", t, s)); 181 if (len + 1 > *buflen) 182 return (-1); 183 strcpy(*buf, tmp); 184 *buf += len; 185 *buflen -= len; 186 return (0); 187 } 188
