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d7ce7006 1/*\r
2 * Copyright (c) 1996 by Internet Software Consortium.\r
3 *\r
4 * Permission to use, copy, modify, and distribute this software for any\r
5 * purpose with or without fee is hereby granted, provided that the above\r
6 * copyright notice and this permission notice appear in all copies.\r
7 *\r
8 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS\r
9 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES\r
10 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE\r
11 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL\r
12 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR\r
13 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS\r
14 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS\r
15 * SOFTWARE.\r
16 */\r
17\r
18/*\r
19 * Portions copyright (c) 1999, 2000\r
20 * Intel Corporation.\r
21 * All rights reserved.\r
22 * \r
23 * Redistribution and use in source and binary forms, with or without\r
24 * modification, are permitted provided that the following conditions\r
25 * are met:\r
26 * \r
27 * 1. Redistributions of source code must retain the above copyright\r
28 * notice, this list of conditions and the following disclaimer.\r
29 * \r
30 * 2. Redistributions in binary form must reproduce the above copyright\r
31 * notice, this list of conditions and the following disclaimer in the\r
32 * documentation and/or other materials provided with the distribution.\r
33 * \r
34 * 3. All advertising materials mentioning features or use of this software\r
35 * must display the following acknowledgement:\r
36 * \r
37 * This product includes software developed by Intel Corporation and\r
38 * its contributors.\r
39 * \r
40 * 4. Neither the name of Intel Corporation or its contributors may be\r
41 * used to endorse or promote products derived from this software\r
42 * without specific prior written permission.\r
43 * \r
44 * THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS''\r
45 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r
46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r
47 * ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE\r
48 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\r
49 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\r
50 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\r
51 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r
52 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\r
53 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF\r
54 * THE POSSIBILITY OF SUCH DAMAGE.\r
55 * \r
56 */\r
57\r
d7ce7006 58/* Import. */\r
59\r
60#include <arpa/nameser.h>\r
61\r
62#include <ctype.h>\r
63#include <errno.h>\r
64#include <stdio.h>\r
65#include <string.h>\r
66\r
67#define SPRINTF(x) ((size_t)sprintf x)\r
68\r
69/* Forward. */\r
70\r
71static int fmt1(int t, char s, char **buf, size_t *buflen);\r
72\r
73/* Macros. */\r
74\r
75#define T(x) if ((x) < 0) return (-1); else (void)NULL\r
76\r
77/* Public. */\r
78\r
79int\r
80ns_format_ttl(u_long src, char *dst, size_t dstlen) {\r
81 char *odst = dst;\r
82 int secs, mins, hours, days, weeks, x;\r
83 char *p;\r
84\r
85 secs = (int)(src % 60); src /= 60;\r
86 mins = (int)(src % 60); src /= 60;\r
87 hours = (int)(src % 24); src /= 24;\r
88 days = (int)(src % 7); src /= 7;\r
89 weeks = (int)src; src = 0;\r
90\r
91 x = 0;\r
92 if (weeks) {\r
93 T(fmt1(weeks, 'W', &dst, &dstlen));\r
94 x++;\r
95 }\r
96 if (days) {\r
97 T(fmt1(days, 'D', &dst, &dstlen));\r
98 x++;\r
99 }\r
100 if (hours) {\r
101 T(fmt1(hours, 'H', &dst, &dstlen));\r
102 x++;\r
103 }\r
104 if (mins) {\r
105 T(fmt1(mins, 'M', &dst, &dstlen));\r
106 x++;\r
107 }\r
108 if (secs || !(weeks || days || hours || mins)) {\r
109 T(fmt1(secs, 'S', &dst, &dstlen));\r
110 x++;\r
111 }\r
112\r
113 if (x > 1) {\r
114 int ch;\r
115\r
116 for (p = odst; (ch = *p) != '\0'; p++)\r
117 if (isascii(ch) && isupper(ch))\r
118 *p = (char)( tolower(ch));\r
119 }\r
120\r
121 return ((int)(dst - odst));\r
122}\r
123\r
124int\r
125ns_parse_ttl(const char *src, u_long *dst) {\r
126 u_long ttl, tmp;\r
127 int ch, digits, dirty;\r
128\r
129 ttl = 0;\r
130 tmp = 0;\r
131 digits = 0;\r
132 dirty = 0;\r
133 while ((ch = *src++) != '\0') {\r
134 if (!isascii(ch) || !isprint(ch))\r
135 goto einval;\r
136 if (isdigit(ch)) {\r
137 tmp *= 10;\r
138 tmp += (ch - '0');\r
139 digits++;\r
140 continue;\r
141 }\r
142 if (digits == 0)\r
143 goto einval;\r
144 if (islower(ch))\r
145 ch = toupper(ch);\r
146 switch (ch) {\r
147 case 'W': tmp *= 7;\r
148 case 'D': tmp *= 24;\r
149 case 'H': tmp *= 60;\r
150 case 'M': tmp *= 60;\r
151 case 'S': break;\r
152 default: goto einval;\r
153 }\r
154 ttl += tmp;\r
155 tmp = 0;\r
156 digits = 0;\r
157 dirty = 1;\r
158 }\r
159 if (digits > 0) {\r
160 if (dirty)\r
161 goto einval;\r
162 else\r
163 ttl += tmp;\r
164 }\r
165 *dst = ttl;\r
166 return (0);\r
167\r
168 einval:\r
169 errno = EINVAL;\r
170 return (-1);\r
171}\r
172\r
173/* Private. */\r
174\r
175static int\r
176fmt1(int t, char s, char **buf, size_t *buflen) {\r
177 char tmp[50];\r
178 size_t len;\r
179\r
180 len = SPRINTF((tmp, "%d%c", t, s));\r
181 if (len + 1 > *buflen)\r
182 return (-1);\r
183 strcpy(*buf, tmp);\r
184 *buf += len;\r
185 *buflen -= len;\r
186 return (0);\r
187}\r