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d7ce7006 | 1 | /*\r |
2 | * Copyright (c) 1983, 1993\r | |
3 | * The Regents of the University of California. All rights reserved.\r | |
4 | *\r | |
5 | * Redistribution and use in source and binary forms, with or without\r | |
6 | * modification, are permitted provided that the following conditions\r | |
7 | * are met:\r | |
8 | * 1. Redistributions of source code must retain the above copyright\r | |
9 | * notice, this list of conditions and the following disclaimer.\r | |
10 | * 2. Redistributions in binary form must reproduce the above copyright\r | |
11 | * notice, this list of conditions and the following disclaimer in the\r | |
12 | * documentation and/or other materials provided with the distribution.\r | |
13 | * 3. All advertising materials mentioning features or use of this software\r | |
14 | * must display the following acknowledgement:\r | |
15 | * This product includes software developed by the University of\r | |
16 | * California, Berkeley and its contributors.\r | |
17 | * 4. Neither the name of the University nor the names of its contributors\r | |
18 | * may be used to endorse or promote products derived from this software\r | |
19 | * without specific prior written permission.\r | |
20 | *\r | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r | |
31 | * SUCH DAMAGE.\r | |
32 | */\r | |
33 | \r | |
34 | #if defined(LIBC_SCCS) && !defined(lint)\r | |
35 | static char sccsid[] = "@(#)getservent.c 8.1 (Berkeley) 6/4/93";\r | |
36 | #endif /* LIBC_SCCS and not lint */\r | |
37 | \r | |
38 | #include <sys/types.h>\r | |
39 | #include <sys/socket.h>\r | |
40 | #include <netdb.h>\r | |
41 | #include <stdio.h>\r | |
42 | #include <string.h>\r | |
43 | #include <stdlib.h>\r | |
44 | #ifdef YP\r | |
45 | #include <rpc/rpc.h>\r | |
46 | #include <rpcsvc/yp_prot.h>\r | |
47 | #include <rpcsvc/ypclnt.h>\r | |
48 | static int serv_stepping_yp = 0;\r | |
49 | extern int _yp_check __P(( char ** ));\r | |
50 | #endif\r | |
51 | \r | |
52 | \r | |
53 | #define MAXALIASES 35\r | |
54 | \r | |
55 | static FILE *servf = NULL;\r | |
56 | static char line[BUFSIZ+1];\r | |
57 | static struct servent serv;\r | |
58 | static char *serv_aliases[MAXALIASES];\r | |
59 | int _serv_stayopen;\r | |
60 | \r | |
61 | #ifdef YP\r | |
62 | char *___getservbyname_yp = NULL;\r | |
63 | char *___getservbyproto_yp = NULL;\r | |
64 | int ___getservbyport_yp = 0;\r | |
65 | static char *yp_domain = NULL;\r | |
66 | \r | |
67 | static int\r | |
68 | _getservbyport_yp(line)\r | |
69 | char *line;\r | |
70 | {\r | |
71 | char *result;\r | |
72 | int resultlen;\r | |
73 | char buf[YPMAXRECORD + 2];\r | |
74 | int rv;\r | |
75 | \r | |
76 | snprintf(buf, sizeof(buf), "%d/%s", ntohs(___getservbyport_yp),\r | |
77 | ___getservbyproto_yp);\r | |
78 | \r | |
79 | ___getservbyport_yp = 0;\r | |
80 | ___getservbyproto_yp = NULL;\r | |
81 | \r | |
82 | if(!yp_domain) {\r | |
83 | if(yp_get_default_domain(&yp_domain))\r | |
84 | return (0);\r | |
85 | }\r | |
86 | \r | |
87 | /*\r | |
88 | * We have to be a little flexible here. Ideally you're supposed\r | |
89 | * to have both a services.byname and a services.byport map, but\r | |
90 | * some systems have only services.byname. FreeBSD cheats a little\r | |
91 | * by putting the services.byport information in the same map as\r | |
92 | * services.byname so that either case will work. We allow for both\r | |
93 | * possibilities here: if there is no services.byport map, we try\r | |
94 | * services.byname instead.\r | |
95 | */\r | |
96 | if ((rv = yp_match(yp_domain, "services.byport", buf, strlen(buf),\r | |
97 | &result, &resultlen))) {\r | |
98 | if (rv == YPERR_MAP) {\r | |
99 | if (yp_match(yp_domain, "services.byname", buf,\r | |
100 | strlen(buf), &result, &resultlen))\r | |
101 | return(0);\r | |
102 | } else\r | |
103 | return(0);\r | |
104 | }\r | |
105 | \r | |
106 | /* getservent() expects lines terminated with \n -- make it happy */\r | |
107 | snprintf(line, BUFSIZ, "%.*s\n", resultlen, result);\r | |
108 | \r | |
109 | free(result);\r | |
110 | return(1);\r | |
111 | }\r | |
112 | \r | |
113 | static int\r | |
114 | _getservbyname_yp(line)\r | |
115 | char *line;\r | |
116 | {\r | |
117 | char *result;\r | |
118 | int resultlen;\r | |
119 | char buf[YPMAXRECORD + 2];\r | |
120 | \r | |
121 | if(!yp_domain) {\r | |
122 | if(yp_get_default_domain(&yp_domain))\r | |
123 | return (0);\r | |
124 | }\r | |
125 | \r | |
126 | snprintf(buf, sizeof(buf), "%s/%s", ___getservbyname_yp,\r | |
127 | ___getservbyproto_yp);\r | |
128 | \r | |
129 | ___getservbyname_yp = 0;\r | |
130 | ___getservbyproto_yp = NULL;\r | |
131 | \r | |
132 | if (yp_match(yp_domain, "services.byname", buf, strlen(buf),\r | |
133 | &result, &resultlen)) {\r | |
134 | return(0);\r | |
135 | }\r | |
136 | \r | |
137 | /* getservent() expects lines terminated with \n -- make it happy */\r | |
138 | snprintf(line, BUFSIZ, "%.*s\n", resultlen, result);\r | |
139 | \r | |
140 | free(result);\r | |
141 | return(1);\r | |
142 | }\r | |
143 | \r | |
144 | static int\r | |
145 | _getservent_yp(line)\r | |
146 | char *line;\r | |
147 | {\r | |
148 | static char *key = NULL;\r | |
149 | static int keylen;\r | |
150 | char *lastkey, *result;\r | |
151 | int resultlen;\r | |
152 | int rv;\r | |
153 | \r | |
154 | if(!yp_domain) {\r | |
155 | if(yp_get_default_domain(&yp_domain))\r | |
156 | return (0);\r | |
157 | }\r | |
158 | \r | |
159 | if (!serv_stepping_yp) {\r | |
160 | if (key)\r | |
161 | free(key);\r | |
162 | if ((rv = yp_first(yp_domain, "services.byname", &key, &keylen,\r | |
163 | &result, &resultlen))) {\r | |
164 | serv_stepping_yp = 0;\r | |
165 | return(0);\r | |
166 | }\r | |
167 | serv_stepping_yp = 1;\r | |
168 | } else {\r | |
169 | lastkey = key;\r | |
170 | rv = yp_next(yp_domain, "services.byname", key, keylen, &key,\r | |
171 | &keylen, &result, &resultlen);\r | |
172 | free(lastkey);\r | |
173 | if (rv) {\r | |
174 | serv_stepping_yp = 0;\r | |
175 | return (0);\r | |
176 | }\r | |
177 | }\r | |
178 | \r | |
179 | /* getservent() expects lines terminated with \n -- make it happy */\r | |
180 | snprintf(line, BUFSIZ, "%.*s\n", resultlen, result);\r | |
181 | \r | |
182 | free(result);\r | |
183 | \r | |
184 | return(1);\r | |
185 | }\r | |
186 | #endif\r | |
187 | \r | |
188 | void\r | |
189 | setservent(int f)\r | |
190 | {\r | |
191 | if (servf == NULL)\r | |
192 | servf = fopen(_PATH_SERVICES, "r" );\r | |
193 | else\r | |
194 | rewind(servf);\r | |
195 | _serv_stayopen |= f;\r | |
196 | }\r | |
197 | \r | |
198 | void\r | |
199 | endservent()\r | |
200 | {\r | |
201 | if (servf) {\r | |
202 | fclose(servf);\r | |
203 | servf = NULL;\r | |
204 | }\r | |
205 | _serv_stayopen = 0;\r | |
206 | }\r | |
207 | \r | |
208 | struct servent *\r | |
209 | getservent()\r | |
210 | {\r | |
211 | char *p;\r | |
212 | register char *cp, **q;\r | |
213 | \r | |
214 | #ifdef YP\r | |
215 | if (serv_stepping_yp && _getservent_yp(line)) {\r | |
216 | p = (char *)&line;\r | |
217 | goto unpack;\r | |
218 | }\r | |
219 | tryagain:\r | |
220 | #endif\r | |
221 | if (servf == NULL && (servf = fopen(_PATH_SERVICES, "r" )) == NULL)\r | |
222 | return (NULL);\r | |
223 | again:\r | |
224 | if ((p = fgets(line, BUFSIZ, servf)) == NULL)\r | |
225 | return (NULL);\r | |
226 | #ifdef YP\r | |
227 | if (*p == '+' && _yp_check(NULL)) {\r | |
228 | if (___getservbyname_yp != NULL) {\r | |
229 | if (!_getservbyname_yp(line))\r | |
230 | goto tryagain;\r | |
231 | } \r | |
232 | else if (___getservbyport_yp != 0) {\r | |
233 | if (!_getservbyport_yp(line))\r | |
234 | goto tryagain;\r | |
235 | }\r | |
236 | else if (!_getservent_yp(line))\r | |
237 | goto tryagain;\r | |
238 | }\r | |
239 | unpack:\r | |
240 | #endif\r | |
241 | if (*p == '#')\r | |
242 | goto again;\r | |
243 | cp = strpbrk(p, "#\n");\r | |
244 | if (cp == NULL)\r | |
245 | goto again;\r | |
246 | *cp = '\0';\r | |
247 | serv.s_name = p;\r | |
248 | p = strpbrk(p, " \t");\r | |
249 | if (p == NULL)\r | |
250 | goto again;\r | |
251 | *p++ = '\0';\r | |
252 | while (*p == ' ' || *p == '\t')\r | |
253 | p++;\r | |
254 | cp = strpbrk(p, ",/");\r | |
255 | if (cp == NULL)\r | |
256 | goto again;\r | |
257 | *cp++ = '\0';\r | |
258 | serv.s_port = htons((u_short)atoi(p));\r | |
259 | serv.s_proto = cp;\r | |
260 | q = serv.s_aliases = serv_aliases;\r | |
261 | cp = strpbrk(cp, " \t");\r | |
262 | if (cp != NULL)\r | |
263 | *cp++ = '\0';\r | |
264 | while (cp && *cp) {\r | |
265 | if (*cp == ' ' || *cp == '\t') {\r | |
266 | cp++;\r | |
267 | continue;\r | |
268 | }\r | |
269 | if (q < &serv_aliases[MAXALIASES - 1])\r | |
270 | *q++ = cp;\r | |
271 | cp = strpbrk(cp, " \t");\r | |
272 | if (cp != NULL)\r | |
273 | *cp++ = '\0';\r | |
274 | }\r | |
275 | *q = NULL;\r | |
276 | return (&serv);\r | |
277 | }\r |