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-rw-r--r--src/lib/libc/net/res_init.c554
1 files changed, 414 insertions, 140 deletions
diff --git a/src/lib/libc/net/res_init.c b/src/lib/libc/net/res_init.c
index 33cc8d39f1..42d3b3ca1e 100644
--- a/src/lib/libc/net/res_init.c
+++ b/src/lib/libc/net/res_init.c
@@ -1,9 +1,11 @@
1/* $NetBSD: res_init.c,v 1.8 1995/06/03 22:33:36 mycroft Exp $ */ 1/* $OpenBSD: res_init.c,v 1.37 2008/08/15 14:57:20 djm Exp $ */
2 2
3/*- 3/*
4 * ++Copyright++ 1985, 1989, 1993
5 * -
4 * Copyright (c) 1985, 1989, 1993 6 * Copyright (c) 1985, 1989, 1993
5 * The Regents of the University of California. All rights reserved. 7 * The Regents of the University of California. All rights reserved.
6 * 8 *
7 * Redistribution and use in source and binary forms, with or without 9 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions 10 * modification, are permitted provided that the following conditions
9 * are met: 11 * are met:
@@ -12,14 +14,10 @@
12 * 2. Redistributions in binary form must reproduce the above copyright 14 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the 15 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution. 16 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software 17 * 3. Neither the name of the University nor the names of its contributors
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software 18 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission. 19 * without specific prior written permission.
22 * 20 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
@@ -53,80 +51,199 @@
53 * --Copyright-- 51 * --Copyright--
54 */ 52 */
55 53
56#if defined(LIBC_SCCS) && !defined(lint) 54#ifndef INET6
57#if 0 55#define INET6
58static char sccsid[] = "@(#)res_init.c 8.1 (Berkeley) 6/7/93";
59static char rcsid[] = "$Id: res_init.c,v 4.9.1.1 1993/05/02 22:43:03 vixie Rel ";
60#else
61static char rcsid[] = "$NetBSD: res_init.c,v 1.8 1995/06/03 22:33:36 mycroft Exp $";
62#endif 56#endif
63#endif /* LIBC_SCCS and not lint */
64 57
58#include <sys/types.h>
65#include <sys/param.h> 59#include <sys/param.h>
66#include <sys/socket.h> 60#include <sys/socket.h>
61#include <sys/time.h>
62#include <sys/stat.h>
67#include <netinet/in.h> 63#include <netinet/in.h>
68#include <arpa/inet.h> 64#include <arpa/inet.h>
69#include <arpa/nameser.h> 65#include <arpa/nameser.h>
66
67#include <stdio.h>
68#include <ctype.h>
70#include <resolv.h> 69#include <resolv.h>
71#include <unistd.h> 70#include <unistd.h>
72#include <stdio.h>
73#include <stdlib.h> 71#include <stdlib.h>
74#include <string.h> 72#include <string.h>
73#ifdef INET6
74#include <netdb.h>
75#endif /* INET6 */
75 76
76static void res_setoptions __P((char *, char *)); 77#include "thread_private.h"
77static u_int32_t net_mask __P((struct in_addr)); 78
79/*-------------------------------------- info about "sortlist" --------------
80 * Marc Majka 1994/04/16
81 * Allan Nathanson 1994/10/29 (BIND 4.9.3.x)
82 *
83 * NetInfo resolver configuration directory support.
84 *
85 * Allow a NetInfo directory to be created in the hierarchy which
86 * contains the same information as the resolver configuration file.
87 *
88 * - The local domain name is stored as the value of the "domain" property.
89 * - The Internet address(es) of the name server(s) are stored as values
90 * of the "nameserver" property.
91 * - The name server addresses are stored as values of the "nameserver"
92 * property.
93 * - The search list for host-name lookup is stored as values of the
94 * "search" property.
95 * - The sortlist comprised of IP address netmask pairs are stored as
96 * values of the "sortlist" property. The IP address and optional netmask
97 * should be separated by a slash (/) or ampersand (&) character.
98 * - Internal resolver variables can be set from the value of the "options"
99 * property.
100 */
101
102static void res_setoptions(char *, char *);
103
104#ifdef RESOLVSORT
105static const char sort_mask[] = "/&";
106#define ISSORTMASK(ch) (strchr(sort_mask, ch) != NULL)
107static u_int32_t net_mask(struct in_addr);
108#endif
78 109
79/* 110/*
80 * Resolver state default settings 111 * Resolver state default settings.
81 */ 112 */
113void *__THREAD_NAME(_res);
114
115struct __res_state _res
116# if defined(__BIND_RES_TEXT)
117 = { RES_TIMEOUT, } /* Motorola, et al. */
118# endif
119 ;
120#ifdef INET6
121void *__THREAD_NAME(_res_ext);
122
123struct __res_state_ext _res_ext;
124#endif /* INET6 */
82 125
83struct __res_state _res = { 126int __res_chktime = 30;
84 RES_TIMEOUT, /* retransmition time interval */
85 4, /* number of times to retransmit */
86 RES_DEFAULT, /* options flags */
87 1, /* number of name servers */
88};
89 127
90/* 128/*
91 * Set up default settings. If the configuration file exist, the values 129 * Set up default settings. If the configuration file exist, the values
92 * there will have precedence. Otherwise, the server address is set to 130 * there will have precedence. Otherwise, the server address is set to
93 * INADDR_ANY and the default domain name comes from the gethostname(). 131 * INADDR_ANY and the default domain name comes from the gethostname().
94 * 132 *
95 * The configuration file should only be used if you want to redefine your 133 * An interrim version of this code (BIND 4.9, pre-4.4BSD) used 127.0.0.1
96 * domain or run without a server on your machine. 134 * rather than INADDR_ANY ("0.0.0.0") as the default name server address
135 * since it was noted that INADDR_ANY actually meant ``the first interface
136 * you "ifconfig"'d at boot time'' and if this was a SLIP or PPP interface,
137 * it had to be "up" in order for you to reach your own name server. It
138 * was later decided that since the recommended practice is to always
139 * install local static routes through 127.0.0.1 for all your network
140 * interfaces, that we could solve this problem without a code change.
141 *
142 * The configuration file should always be used, since it is the only way
143 * to specify a default domain. If you are running a server on your local
144 * machine, you should say "nameserver 0.0.0.0" or "nameserver 127.0.0.1"
145 * in the configuration file.
97 * 146 *
98 * Return 0 if completes successfully, -1 on error 147 * Return 0 if completes successfully, -1 on error
99 */ 148 */
100res_init() 149int
150res_init(void)
151{
152
153 return (_res_init(1));
154}
155
156int
157_res_init(int usercall)
101{ 158{
102 register FILE *fp; 159 struct stat sb;
103 register char *cp, **pp, *net; 160 struct __res_state *_resp = _THREAD_PRIVATE(_res, _res, &_res);
104 register int n; 161#ifdef INET6
105 char buf[BUFSIZ], buf2[BUFSIZ]; 162 struct __res_state_ext *_res_extp = _THREAD_PRIVATE(_res_ext, _res_ext,
163 &_res_ext);
164#endif
165 FILE *fp;
166 char *cp, **pp;
167 int n;
168 char buf[BUFSIZ];
106 int nserv = 0; /* number of nameserver records read from file */ 169 int nserv = 0; /* number of nameserver records read from file */
107 int haveenv = 0; 170 int haveenv = 0;
108 int havesearch = 0; 171 int havesearch = 0;
172 size_t len;
173#ifdef RESOLVSORT
109 int nsort = 0; 174 int nsort = 0;
110 u_long mask; 175 char *net;
176#endif
177#ifndef RFC1535
178 int dots;
179#endif
180
181 if (!usercall && _resp->options & RES_INIT &&
182 _resp->reschktime >= time(NULL))
183 return (0);
184 _resp->reschktime = time(NULL) + __res_chktime;
185 if (stat(_PATH_RESCONF, &sb) != -1) {
186 if (!usercall && timespeccmp(&sb.st_mtimespec,
187 &_resp->restimespec, ==))
188 return (0);
189 else
190 _resp->restimespec = sb.st_mtimespec;
191 } else {
192 /*
193 * Lost the file, in chroot?
194 * Don't trash settings
195 */
196 if (!usercall && timespecisset(&_resp->restimespec))
197 return (0);
198 }
199
200
201 /*
202 * These three fields used to be statically initialized. This made
203 * it hard to use this code in a shared library. It is necessary,
204 * now that we're doing dynamic initialization here, that we preserve
205 * the old semantics: if an application modifies one of these three
206 * fields of _res before res_init() is called, res_init() will not
207 * alter them. Of course, if an application is setting them to
208 * _zero_ before calling res_init(), hoping to override what used
209 * to be the static default, we can't detect it and unexpected results
210 * will follow. Zero for any of these fields would make no sense,
211 * so one can safely assume that the applications were already getting
212 * unexpected results.
213 *
214 * _res.options is tricky since some apps were known to diddle the bits
215 * before res_init() was first called. We can't replicate that semantic
216 * with dynamic initialization (they may have turned bits off that are
217 * set in RES_DEFAULT). Our solution is to declare such applications
218 * "broken". They could fool us by setting RES_INIT but none do (yet).
219 */
220 if (!_resp->retrans)
221 _resp->retrans = RES_TIMEOUT;
222 if (!_resp->retry)
223 _resp->retry = 4;
224 if (!(_resp->options & RES_INIT))
225 _resp->options = RES_DEFAULT;
111 226
112 _res.nsaddr.sin_len = sizeof(struct sockaddr_in);
113 _res.nsaddr.sin_family = AF_INET;
114 _res.nsaddr.sin_port = htons(NAMESERVER_PORT);
115#ifdef USELOOPBACK 227#ifdef USELOOPBACK
116 _res.nsaddr.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1); 228 _resp->nsaddr.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1);
117#else 229#else
118 _res.nsaddr.sin_addr.s_addr = INADDR_ANY; 230 _resp->nsaddr.sin_addr.s_addr = INADDR_ANY;
231#endif
232 _resp->nsaddr.sin_family = AF_INET;
233 _resp->nsaddr.sin_port = htons(NAMESERVER_PORT);
234 _resp->nsaddr.sin_len = sizeof(struct sockaddr_in);
235#ifdef INET6
236 if (sizeof(_res_extp->nsaddr) >= _resp->nsaddr.sin_len)
237 memcpy(&_res_extp->nsaddr, &_resp->nsaddr, _resp->nsaddr.sin_len);
119#endif 238#endif
120 _res.nscount = 1; 239 _resp->nscount = 1;
121 _res.ndots = 1; 240 _resp->ndots = 1;
122 _res.pfcode = 0; 241 _resp->pfcode = 0;
123 strncpy(_res.lookups, "f", sizeof _res.lookups); 242 strlcpy(_resp->lookups, "f", sizeof _resp->lookups);
124 243
125 /* Allow user to override the local domain definition */ 244 /* Allow user to override the local domain definition */
126 if ((cp = getenv("LOCALDOMAIN")) != NULL) { 245 if (issetugid() == 0 && (cp = getenv("LOCALDOMAIN")) != NULL) {
127 (void)strncpy(_res.defdname, cp, sizeof(_res.defdname) - 1); 246 strlcpy(_resp->defdname, cp, sizeof(_resp->defdname));
128 if ((cp = strpbrk(_res.defdname, " \t\n")) != NULL)
129 *cp = '\0';
130 haveenv++; 247 haveenv++;
131 248
132 /* 249 /*
@@ -136,11 +253,11 @@ res_init()
136 * one that they want to use as an individual (even more 253 * one that they want to use as an individual (even more
137 * important now that the rfc1535 stuff restricts searches) 254 * important now that the rfc1535 stuff restricts searches)
138 */ 255 */
139 cp = _res.defdname; 256 cp = _resp->defdname;
140 pp = _res.dnsrch; 257 pp = _resp->dnsrch;
141 *pp++ = cp; 258 *pp++ = cp;
142 for (n = 0; *cp && pp < _res.dnsrch + MAXDNSRCH; cp++) { 259 for (n = 0; *cp && pp < _resp->dnsrch + MAXDNSRCH; cp++) {
143 if (*cp == '\n') /* silly backwards compat */ 260 if (*cp == '\n') /* silly backwards compat */
144 break; 261 break;
145 else if (*cp == ' ' || *cp == '\t') { 262 else if (*cp == ' ' || *cp == '\t') {
146 *cp = 0; 263 *cp = 0;
@@ -158,16 +275,29 @@ res_init()
158 *pp++ = 0; 275 *pp++ = 0;
159 } 276 }
160 277
278#define MATCH(line, name) \
279 (!strncmp(line, name, sizeof(name) - 1) && \
280 (line[sizeof(name) - 1] == ' ' || \
281 line[sizeof(name) - 1] == '\t'))
282
161 if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) { 283 if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) {
162 strncpy(_res.lookups, "bf", sizeof _res.lookups); 284 strlcpy(_resp->lookups, "bf", sizeof _resp->lookups);
163 285
164 /* read the config file */ 286 /* read the config file */
165 while (fgets(buf, sizeof(buf), fp) != NULL) { 287 buf[0] = '\0';
288 while ((cp = fgetln(fp, &len)) != NULL) {
289 /* skip lines that are too long */
290 if (len >= sizeof(buf))
291 continue;
292 (void)memcpy(buf, cp, len);
293 buf[len] = '\0';
166 /* skip comments */ 294 /* skip comments */
167 if ((*buf == ';') || (*buf == '#')) 295 if ((cp = strpbrk(buf, ";#")) != NULL)
296 *cp = '\0';
297 if (buf[0] == '\0')
168 continue; 298 continue;
169 /* read default domain name */ 299 /* read default domain name */
170 if (!strncmp(buf, "domain", sizeof("domain") - 1)) { 300 if (MATCH(buf, "domain")) {
171 if (haveenv) /* skip if have from environ */ 301 if (haveenv) /* skip if have from environ */
172 continue; 302 continue;
173 cp = buf + sizeof("domain") - 1; 303 cp = buf + sizeof("domain") - 1;
@@ -175,18 +305,17 @@ res_init()
175 cp++; 305 cp++;
176 if ((*cp == '\0') || (*cp == '\n')) 306 if ((*cp == '\0') || (*cp == '\n'))
177 continue; 307 continue;
178 (void)strncpy(_res.defdname, cp, 308 strlcpy(_resp->defdname, cp, sizeof(_resp->defdname));
179 sizeof(_res.defdname) - 1); 309 if ((cp = strpbrk(_resp->defdname, " \t\n")) != NULL)
180 if ((cp = strpbrk(_res.defdname, " \t\n")) != NULL)
181 *cp = '\0'; 310 *cp = '\0';
182 havesearch = 0; 311 havesearch = 0;
183 continue; 312 continue;
184 } 313 }
185 /* lookup types */ 314 /* lookup types */
186 if (!strncmp(buf, "lookup", sizeof("lookup") -1)) { 315 if (MATCH(buf, "lookup")) {
187 char *sp = NULL; 316 char *sp = NULL;
188 317
189 bzero(_res.lookups, sizeof _res.lookups); 318 bzero(_resp->lookups, sizeof _resp->lookups);
190 cp = buf + sizeof("lookup") - 1; 319 cp = buf + sizeof("lookup") - 1;
191 for (n = 0;; cp++) { 320 for (n = 0;; cp++) {
192 if (n == MAXDNSLUS) 321 if (n == MAXDNSLUS)
@@ -194,14 +323,14 @@ res_init()
194 if ((*cp == '\0') || (*cp == '\n')) { 323 if ((*cp == '\0') || (*cp == '\n')) {
195 if (sp) { 324 if (sp) {
196 if (*sp=='y' || *sp=='b' || *sp=='f') 325 if (*sp=='y' || *sp=='b' || *sp=='f')
197 _res.lookups[n++] = *sp; 326 _resp->lookups[n++] = *sp;
198 sp = NULL; 327 sp = NULL;
199 } 328 }
200 break; 329 break;
201 } else if ((*cp == ' ') || (*cp == '\t') || (*cp == ',')) { 330 } else if ((*cp == ' ') || (*cp == '\t') || (*cp == ',')) {
202 if (sp) { 331 if (sp) {
203 if (*sp=='y' || *sp=='b' || *sp=='f') 332 if (*sp=='y' || *sp=='b' || *sp=='f')
204 _res.lookups[n++] = *sp; 333 _resp->lookups[n++] = *sp;
205 sp = NULL; 334 sp = NULL;
206 } 335 }
207 } else if (sp == NULL) 336 } else if (sp == NULL)
@@ -210,7 +339,7 @@ res_init()
210 continue; 339 continue;
211 } 340 }
212 /* set search list */ 341 /* set search list */
213 if (!strncmp(buf, "search", sizeof("search") - 1)) { 342 if (MATCH(buf, "search")) {
214 if (haveenv) /* skip if have from environ */ 343 if (haveenv) /* skip if have from environ */
215 continue; 344 continue;
216 cp = buf + sizeof("search") - 1; 345 cp = buf + sizeof("search") - 1;
@@ -218,18 +347,17 @@ res_init()
218 cp++; 347 cp++;
219 if ((*cp == '\0') || (*cp == '\n')) 348 if ((*cp == '\0') || (*cp == '\n'))
220 continue; 349 continue;
221 (void)strncpy(_res.defdname, cp, 350 strlcpy(_resp->defdname, cp, sizeof(_resp->defdname));
222 sizeof(_res.defdname) - 1); 351 if ((cp = strchr(_resp->defdname, '\n')) != NULL)
223 if ((cp = strchr(_res.defdname, '\n')) != NULL)
224 *cp = '\0'; 352 *cp = '\0';
225 /* 353 /*
226 * Set search list to be blank-separated strings 354 * Set search list to be blank-separated strings
227 * on rest of line. 355 * on rest of line.
228 */ 356 */
229 cp = _res.defdname; 357 cp = _resp->defdname;
230 pp = _res.dnsrch; 358 pp = _resp->dnsrch;
231 *pp++ = cp; 359 *pp++ = cp;
232 for (n = 0; *cp && pp < _res.dnsrch + MAXDNSRCH; cp++) { 360 for (n = 0; *cp && pp < _resp->dnsrch + MAXDNSRCH; cp++) {
233 if (*cp == ' ' || *cp == '\t') { 361 if (*cp == ' ' || *cp == '\t') {
234 *cp = 0; 362 *cp = 0;
235 n = 1; 363 n = 1;
@@ -247,130 +375,274 @@ res_init()
247 continue; 375 continue;
248 } 376 }
249 /* read nameservers to query */ 377 /* read nameservers to query */
250 if (!strncmp(buf, "nameserver", sizeof("nameserver") - 1) && 378 if (MATCH(buf, "nameserver") && nserv < MAXNS) {
251 nserv < MAXNS) { 379 char *q;
252 struct in_addr a; 380 struct addrinfo hints, *res;
381 char pbuf[NI_MAXSERV];
253 382
254 cp = buf + sizeof("nameserver") - 1; 383 cp = buf + sizeof("nameserver") - 1;
255 while (*cp == ' ' || *cp == '\t') 384 while (*cp == ' ' || *cp == '\t')
256 cp++; 385 cp++;
257 if ((*cp != '\0') && (*cp != '\n') && inet_aton(cp, &a)) { 386 if ((*cp == '\0') || (*cp == '\n'))
258 _res.nsaddr_list[nserv].sin_len = sizeof(struct sockaddr_in); 387 continue;
259 _res.nsaddr_list[nserv].sin_family = AF_INET; 388 for (q = cp; *q; q++) {
260 _res.nsaddr_list[nserv].sin_port = 389 if (isspace(*q)) {
261 htons(NAMESERVER_PORT); 390 *q = '\0';
262 _res.nsaddr_list[nserv].sin_addr = a; 391 break;
392 }
393 }
394
395 /* Handle addresses enclosed in [] */
396 *pbuf = '\0';
397 if (*cp == '[') {
398 cp++;
399 if ((q = strchr(cp, ']')) == NULL)
400 continue;
401 *q++ = '\0';
402 /* Extract port, if specified */
403 if (*q++ == ':') {
404 if (strlcpy(pbuf, q, sizeof(pbuf)) >= sizeof(pbuf))
405 continue;
406 }
407 }
408 if (*pbuf == '\0')
409 snprintf(pbuf, sizeof(pbuf), "%u", NAMESERVER_PORT);
410
411 memset(&hints, 0, sizeof(hints));
412 hints.ai_flags = AI_NUMERICHOST;
413 hints.ai_socktype = SOCK_DGRAM;
414 res = NULL;
415 if (getaddrinfo(cp, pbuf, &hints, &res) == 0 &&
416 res->ai_next == NULL) {
417 if (res->ai_addrlen <= sizeof(_res_extp->nsaddr_list[nserv])) {
418 memcpy(&_res_extp->nsaddr_list[nserv], res->ai_addr,
419 res->ai_addrlen);
420 } else {
421 memset(&_res_extp->nsaddr_list[nserv], 0,
422 sizeof(_res_extp->nsaddr_list[nserv]));
423 }
424 if (res->ai_addrlen <= sizeof(_resp->nsaddr_list[nserv])) {
425 memcpy(&_resp->nsaddr_list[nserv], res->ai_addr,
426 res->ai_addrlen);
427 } else {
428 memset(&_resp->nsaddr_list[nserv], 0,
429 sizeof(_resp->nsaddr_list[nserv]));
430 }
263 nserv++; 431 nserv++;
264 } 432 }
433 if (res)
434 freeaddrinfo(res);
265 continue; 435 continue;
266 } 436 }
267 if (!strncmp(buf, "sortlist", sizeof("sortlist") - 1)) { 437#ifdef RESOLVSORT
438 if (MATCH(buf, "sortlist")) {
268 struct in_addr a; 439 struct in_addr a;
440#ifdef INET6
441 struct in6_addr a6;
442 int m, i;
443 u_char *u;
444#endif /* INET6 */
269 445
270 cp = buf + sizeof("sortlist") - 1; 446 cp = buf + sizeof("sortlist") - 1;
271 while (*cp == ' ' || *cp == '\t') 447 while (nsort < MAXRESOLVSORT) {
272 cp++; 448 while (*cp == ' ' || *cp == '\t')
273 while (sscanf(cp,"%[0-9./]s", buf2) && nsort < MAXRESOLVSORT) { 449 cp++;
274 if (net = strchr(buf2, '/')) 450 if (*cp == '\0' || *cp == '\n' || *cp == ';')
275 *net = '\0'; 451 break;
276 if (inet_aton(buf2, &a)) { 452 net = cp;
277 _res.sort_list[nsort].addr = a; 453 while (*cp && !ISSORTMASK(*cp) && *cp != ';' &&
278 if (net && inet_aton(net+1, &a)) { 454 isascii(*cp) && !isspace(*cp))
279 _res.sort_list[nsort].mask = a.s_addr; 455 cp++;
456 n = *cp;
457 *cp = 0;
458 if (inet_aton(net, &a)) {
459 _resp->sort_list[nsort].addr = a;
460 if (ISSORTMASK(n)) {
461 *cp++ = n;
462 net = cp;
463 while (*cp && *cp != ';' &&
464 isascii(*cp) && !isspace(*cp))
465 cp++;
466 n = *cp;
467 *cp = 0;
468 if (inet_aton(net, &a)) {
469 _resp->sort_list[nsort].mask = a.s_addr;
470 } else {
471 _resp->sort_list[nsort].mask =
472 net_mask(_resp->sort_list[nsort].addr);
473 }
280 } else { 474 } else {
281 _res.sort_list[nsort].mask = 475 _resp->sort_list[nsort].mask =
282 net_mask(_res.sort_list[nsort].addr); 476 net_mask(_resp->sort_list[nsort].addr);
283 } 477 }
478#ifdef INET6
479 _res_extp->sort_list[nsort].af = AF_INET;
480 _res_extp->sort_list[nsort].addr.ina =
481 _resp->sort_list[nsort].addr;
482 _res_extp->sort_list[nsort].mask.ina.s_addr =
483 _resp->sort_list[nsort].mask;
484#endif /* INET6 */
284 nsort++; 485 nsort++;
285 } 486 }
286 if (net) 487#ifdef INET6
287 *net = '/'; 488 else if (inet_pton(AF_INET6, net, &a6) == 1) {
288 cp += strlen(buf2); 489 _res_extp->sort_list[nsort].af = AF_INET6;
289 while (*cp == ' ' || *cp == '\t') 490 _res_extp->sort_list[nsort].addr.in6a = a6;
290 cp++; 491 u = (u_char *)&_res_extp->sort_list[nsort].mask.in6a;
492 *cp++ = n;
493 net = cp;
494 while (*cp && *cp != ';' &&
495 isascii(*cp) && !isspace(*cp))
496 cp++;
497 m = n;
498 n = *cp;
499 *cp = 0;
500 switch (m) {
501 case '/':
502 m = atoi(net);
503 break;
504 case '&':
505 if (inet_pton(AF_INET6, net, u) == 1) {
506 m = -1;
507 break;
508 }
509 /* FALLTHROUGH */
510 default:
511 m = sizeof(struct in6_addr) * NBBY;
512 break;
513 }
514 if (m >= 0) {
515 for (i = 0; i < sizeof(struct in6_addr); i++) {
516 if (m <= 0) {
517 *u = 0;
518 } else {
519 m -= NBBY;
520 *u = (u_char)~0;
521 if (m < 0)
522 *u <<= -m;
523 }
524 u++;
525 }
526 }
527 nsort++;
528 }
529#endif /* INET6 */
530 *cp = n;
291 } 531 }
292 continue; 532 continue;
293 } 533 }
294 if (!strncmp(buf, "options", sizeof("options") -1)) { 534#endif
535 if (MATCH(buf, "options")) {
295 res_setoptions(buf + sizeof("options") - 1, "conf"); 536 res_setoptions(buf + sizeof("options") - 1, "conf");
296 continue; 537 continue;
297 } 538 }
298 } 539 }
299 if (nserv > 1) 540 if (nserv > 1)
300 _res.nscount = nserv; 541 _resp->nscount = nserv;
301 _res.nsort = nsort; 542#ifdef RESOLVSORT
543 _resp->nsort = nsort;
544#endif
302 (void) fclose(fp); 545 (void) fclose(fp);
303 } 546 }
304 if (_res.defdname[0] == 0) { 547 if (_resp->defdname[0] == 0 &&
305 if (gethostname(buf, sizeof(_res.defdname) - 1) == 0 && 548 gethostname(buf, sizeof(_resp->defdname) - 1) == 0 &&
306 (cp = strchr(buf, '.'))) 549 (cp = strchr(buf, '.')) != NULL)
307 (void)strcpy(_res.defdname, cp + 1); 550 {
551 strlcpy(_resp->defdname, cp + 1,
552 sizeof(_resp->defdname));
308 } 553 }
309 554
310 /* find components of local domain that might be searched */ 555 /* find components of local domain that might be searched */
311 if (havesearch == 0) { 556 if (havesearch == 0) {
312 pp = _res.dnsrch; 557 pp = _resp->dnsrch;
313 *pp++ = _res.defdname; 558 *pp++ = _resp->defdname;
314#ifndef SEARCH_LOCAL_DOMAINS
315 *pp = NULL; 559 *pp = NULL;
316#else 560
317 for (cp = _res.defdname, n = 0; *cp; cp++) 561#ifndef RFC1535
318 if (*cp == '.') 562 dots = 0;
319 n++; 563 for (cp = _resp->defdname; *cp; cp++)
320 cp = _res.defdname; 564 dots += (*cp == '.');
321 for (; n >= LOCALDOMAINPARTS && pp < _res.dnsrch + MAXDFLSRCH; 565
322 n--) { 566 cp = _resp->defdname;
323 cp = strchr(cp, '.'); 567 while (pp < _resp->dnsrch + MAXDFLSRCH) {
324 *pp++ = ++cp; 568 if (dots < LOCALDOMAINPARTS)
569 break;
570 cp = strchr(cp, '.') + 1; /* we know there is one */
571 *pp++ = cp;
572 dots--;
325 } 573 }
326 *pp++ = 0; 574 *pp = NULL;
327#endif 575#ifdef DEBUG
576 if (_resp->options & RES_DEBUG) {
577 printf(";; res_init()... default dnsrch list:\n");
578 for (pp = _resp->dnsrch; *pp; pp++)
579 printf(";;\t%s\n", *pp);
580 printf(";;\t..END..\n");
581 }
582#endif /* DEBUG */
583#endif /* !RFC1535 */
328 } 584 }
329 585
330 if ((cp = getenv("RES_OPTIONS")) != NULL) 586 if (issetugid())
587 _resp->options |= RES_NOALIASES;
588 else if ((cp = getenv("RES_OPTIONS")) != NULL)
331 res_setoptions(cp, "env"); 589 res_setoptions(cp, "env");
332 _res.options |= RES_INIT; 590 _resp->options |= RES_INIT;
333 return (0); 591 return (0);
334} 592}
335 593
594/* ARGSUSED */
336static void 595static void
337res_setoptions(options, source) 596res_setoptions(char *options, char *source)
338 char *options, *source;
339{ 597{
598 struct __res_state *_resp = _THREAD_PRIVATE(_res, _res, &_res);
340 char *cp = options; 599 char *cp = options;
341 int i; 600 char *endp;
601 long l;
342 602
343#ifdef DEBUG 603#ifdef DEBUG
344 if (_res.options & RES_DEBUG) { 604 if (_resp->options & RES_DEBUG)
345 printf(";; res_setoptions(\"%s\", \"%s\")...\n", 605 printf(";; res_setoptions(\"%s\", \"%s\")...\n",
346 options, source); 606 options, source);
347 }
348#endif 607#endif
349 while (*cp) { 608 while (*cp) {
350 /* skip leading and inner runs of spaces */ 609 /* skip leading and inner runs of spaces */
351 while (*cp == ' ' || *cp == '\t') 610 while (*cp == ' ' || *cp == '\t')
352 cp++; 611 cp++;
353 /* search for and process individual options */ 612 /* search for and process individual options */
354 if (!strncmp(cp, "ndots:", sizeof("ndots:")-1)) { 613 if (!strncmp(cp, "ndots:", sizeof("ndots:") - 1)) {
355 i = atoi(cp + sizeof("ndots:") - 1); 614 char *p = cp + sizeof("ndots:") - 1;
356 if (i <= RES_MAXNDOTS) 615 l = strtol(p, &endp, 10);
357 _res.ndots = i; 616 if (l >= 0 && endp != p &&
358 else 617 (*endp = '\0' || isspace(*endp))) {
359 _res.ndots = RES_MAXNDOTS; 618 if (l <= RES_MAXNDOTS)
619 _resp->ndots = l;
620 else
621 _resp->ndots = RES_MAXNDOTS;
360#ifdef DEBUG 622#ifdef DEBUG
361 if (_res.options & RES_DEBUG) { 623 if (_resp->options & RES_DEBUG)
362 printf(";;\tndots=%d\n", _res.ndots); 624 printf(";;\tndots=%u\n", _resp->ndots);
363 }
364#endif 625#endif
365 } else if (!strncmp(cp, "debug", sizeof("debug")-1)) { 626 }
627 } else if (!strncmp(cp, "debug", sizeof("debug") - 1)) {
366#ifdef DEBUG 628#ifdef DEBUG
367 if (!(_res.options & RES_DEBUG)) { 629 if (!(_resp->options & RES_DEBUG)) {
368 printf(";; res_setoptions(\"%s\", \"%s\")..\n", 630 printf(";; res_setoptions(\"%s\", \"%s\")..\n",
369 options, source); 631 options, source);
370 _res.options |= RES_DEBUG; 632 _resp->options |= RES_DEBUG;
371 } 633 }
372 printf(";;\tdebug\n"); 634 printf(";;\tdebug\n");
373#endif 635#endif
636 } else if (!strncmp(cp, "inet6", sizeof("inet6") - 1)) {
637 _resp->options |= RES_USE_INET6;
638 } else if (!strncmp(cp, "insecure1", sizeof("insecure1") - 1)) {
639 _resp->options |= RES_INSECURE1;
640 } else if (!strncmp(cp, "insecure2", sizeof("insecure2") - 1)) {
641 _resp->options |= RES_INSECURE2;
642 } else if (!strncmp(cp, "edns0", sizeof("edns0") - 1)) {
643 _resp->options |= RES_USE_EDNS0;
644 } else if (!strncmp(cp, "tcp", sizeof("tcp") - 1)) {
645 _resp->options |= RES_USEVC;
374 } else { 646 } else {
375 /* XXX - print a warning here? */ 647 /* XXX - print a warning here? */
376 } 648 }
@@ -380,15 +652,17 @@ res_setoptions(options, source)
380 } 652 }
381} 653}
382 654
655#ifdef RESOLVSORT
656/* XXX - should really support CIDR which means explicit masks always. */
383static u_int32_t 657static u_int32_t
384net_mask(in) /* XXX - should really use system's version of this */ 658net_mask(struct in_addr in) /* XXX - should really use system's version of this */
385 struct in_addr in;
386{ 659{
387 register u_int32_t i = ntohl(in.s_addr); 660 u_int32_t i = ntohl(in.s_addr);
388 661
389 if (IN_CLASSA(i)) 662 if (IN_CLASSA(i))
390 return (htonl(IN_CLASSA_NET)); 663 return (htonl(IN_CLASSA_NET));
391 if (IN_CLASSB(i)) 664 else if (IN_CLASSB(i))
392 return (htonl(IN_CLASSB_NET)); 665 return (htonl(IN_CLASSB_NET));
393 return (htonl(IN_CLASSC_NET)); 666 return (htonl(IN_CLASSC_NET));
394} 667}
668#endif
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-12-11 00:52:21 +0000