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-rw-r--r--src/lib/libc/net/res_init.c593
1 files changed, 453 insertions, 140 deletions
diff --git a/src/lib/libc/net/res_init.c b/src/lib/libc/net/res_init.c
index 33cc8d39f1..18de3550e6 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 1.40 2009/06/05 09:52:26 pyr 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 +51,200 @@
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);
82 122
83struct __res_state _res = { 123struct __res_state_ext _res_ext;
84 RES_TIMEOUT, /* retransmition time interval */ 124#endif /* INET6 */
85 4, /* number of times to retransmit */ 125
86 RES_DEFAULT, /* options flags */ 126int __res_chktime = 30;
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)
101{ 151{
102 register FILE *fp; 152
103 register char *cp, **pp, *net; 153 return (_res_init(1));
104 register int n; 154}
105 char buf[BUFSIZ], buf2[BUFSIZ]; 155
156int
157_res_init(int usercall)
158{
159 struct stat sb;
160 struct __res_state *_resp = _THREAD_PRIVATE(_res, _res, &_res);
161#ifdef INET6
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 int findex;
169 char buf[BUFSIZ];
106 int nserv = 0; /* number of nameserver records read from file */ 170 int nserv = 0; /* number of nameserver records read from file */
107 int haveenv = 0; 171 int haveenv = 0;
108 int havesearch = 0; 172 int havesearch = 0;
173 size_t len;
174#ifdef RESOLVSORT
109 int nsort = 0; 175 int nsort = 0;
110 u_long mask; 176 char *net;
177#endif
178#ifndef RFC1535
179 int dots;
180#endif
181
182 if (!usercall && _resp->options & RES_INIT &&
183 _resp->reschktime >= time(NULL))
184 return (0);
185 _resp->reschktime = time(NULL) + __res_chktime;
186 if (stat(_PATH_RESCONF, &sb) != -1) {
187 if (!usercall && timespeccmp(&sb.st_mtimespec,
188 &_resp->restimespec, ==))
189 return (0);
190 else
191 _resp->restimespec = sb.st_mtimespec;
192 } else {
193 /*
194 * Lost the file, in chroot?
195 * Don't trash settings
196 */
197 if (!usercall && timespecisset(&_resp->restimespec))
198 return (0);
199 }
200
201
202 /*
203 * These three fields used to be statically initialized. This made
204 * it hard to use this code in a shared library. It is necessary,
205 * now that we're doing dynamic initialization here, that we preserve
206 * the old semantics: if an application modifies one of these three
207 * fields of _res before res_init() is called, res_init() will not
208 * alter them. Of course, if an application is setting them to
209 * _zero_ before calling res_init(), hoping to override what used
210 * to be the static default, we can't detect it and unexpected results
211 * will follow. Zero for any of these fields would make no sense,
212 * so one can safely assume that the applications were already getting
213 * unexpected results.
214 *
215 * _res.options is tricky since some apps were known to diddle the bits
216 * before res_init() was first called. We can't replicate that semantic
217 * with dynamic initialization (they may have turned bits off that are
218 * set in RES_DEFAULT). Our solution is to declare such applications
219 * "broken". They could fool us by setting RES_INIT but none do (yet).
220 */
221 if (!_resp->retrans)
222 _resp->retrans = RES_TIMEOUT;
223 if (!_resp->retry)
224 _resp->retry = 4;
225 if (!(_resp->options & RES_INIT))
226 _resp->options = RES_DEFAULT;
111 227
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 228#ifdef USELOOPBACK
116 _res.nsaddr.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1); 229 _resp->nsaddr.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1);
117#else 230#else
118 _res.nsaddr.sin_addr.s_addr = INADDR_ANY; 231 _resp->nsaddr.sin_addr.s_addr = INADDR_ANY;
232#endif
233 _resp->nsaddr.sin_family = AF_INET;
234 _resp->nsaddr.sin_port = htons(NAMESERVER_PORT);
235 _resp->nsaddr.sin_len = sizeof(struct sockaddr_in);
236#ifdef INET6
237 if (sizeof(_res_extp->nsaddr) >= _resp->nsaddr.sin_len)
238 memcpy(&_res_extp->nsaddr, &_resp->nsaddr, _resp->nsaddr.sin_len);
119#endif 239#endif
120 _res.nscount = 1; 240 _resp->nscount = 1;
121 _res.ndots = 1; 241 _resp->ndots = 1;
122 _res.pfcode = 0; 242 _resp->pfcode = 0;
123 strncpy(_res.lookups, "f", sizeof _res.lookups); 243 strlcpy(_resp->lookups, "f", sizeof _resp->lookups);
124 244
125 /* Allow user to override the local domain definition */ 245 /* Allow user to override the local domain definition */
126 if ((cp = getenv("LOCALDOMAIN")) != NULL) { 246 if (issetugid() == 0 && (cp = getenv("LOCALDOMAIN")) != NULL) {
127 (void)strncpy(_res.defdname, cp, sizeof(_res.defdname) - 1); 247 strlcpy(_resp->defdname, cp, sizeof(_resp->defdname));
128 if ((cp = strpbrk(_res.defdname, " \t\n")) != NULL)
129 *cp = '\0';
130 haveenv++; 248 haveenv++;
131 249
132 /* 250 /*
@@ -136,11 +254,11 @@ res_init()
136 * one that they want to use as an individual (even more 254 * one that they want to use as an individual (even more
137 * important now that the rfc1535 stuff restricts searches) 255 * important now that the rfc1535 stuff restricts searches)
138 */ 256 */
139 cp = _res.defdname; 257 cp = _resp->defdname;
140 pp = _res.dnsrch; 258 pp = _resp->dnsrch;
141 *pp++ = cp; 259 *pp++ = cp;
142 for (n = 0; *cp && pp < _res.dnsrch + MAXDNSRCH; cp++) { 260 for (n = 0; *cp && pp < _resp->dnsrch + MAXDNSRCH; cp++) {
143 if (*cp == '\n') /* silly backwards compat */ 261 if (*cp == '\n') /* silly backwards compat */
144 break; 262 break;
145 else if (*cp == ' ' || *cp == '\t') { 263 else if (*cp == ' ' || *cp == '\t') {
146 *cp = 0; 264 *cp = 0;
@@ -158,16 +276,67 @@ res_init()
158 *pp++ = 0; 276 *pp++ = 0;
159 } 277 }
160 278
279#define MATCH(line, name) \
280 (!strncmp(line, name, sizeof(name) - 1) && \
281 (line[sizeof(name) - 1] == ' ' || \
282 line[sizeof(name) - 1] == '\t'))
283
284 /* initialize family lookup preference: inet4 first */
285 _resp->family[0] = AF_INET;
286 _resp->family[1] = AF_INET6;
161 if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) { 287 if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) {
162 strncpy(_res.lookups, "bf", sizeof _res.lookups); 288 strlcpy(_resp->lookups, "bf", sizeof _resp->lookups);
163 289
164 /* read the config file */ 290 /* read the config file */
165 while (fgets(buf, sizeof(buf), fp) != NULL) { 291 buf[0] = '\0';
292 while ((cp = fgetln(fp, &len)) != NULL) {
293 /* skip lines that are too long */
294 if (len >= sizeof(buf))
295 continue;
296 (void)memcpy(buf, cp, len);
297 buf[len] = '\0';
166 /* skip comments */ 298 /* skip comments */
167 if ((*buf == ';') || (*buf == '#')) 299 if ((cp = strpbrk(buf, ";#")) != NULL)
300 *cp = '\0';
301 if (buf[0] == '\0')
168 continue; 302 continue;
303 /* set family lookup order */
304 if (MATCH(buf, "family")) {
305 cp = buf + sizeof("family") - 1;
306 cp += strspn(cp, " \t");
307 cp[strcspn(cp, "\n")] = '\0';
308 findex = 0;
309 _resp->family[0] = _resp->family[1] = -1;
310#define INETLEN (sizeof("inetX") - 1)
311 while (*cp != '\0' && findex < 2) {
312 if (!strncmp(cp, "inet6", INETLEN)) {
313 _resp->family[findex] = AF_INET6;
314 cp += INETLEN;
315 } else if (!strncmp(cp, "inet4", INETLEN)) {
316 _resp->family[findex] = AF_INET;
317 cp += INETLEN;
318 } else {
319 _resp->family[0] = -1;
320 break;
321 }
322 if (*cp != ' ' && *cp != '\t' && *cp != '\0') {
323 _resp->family[findex] = -1;
324 break;
325 }
326 findex++;
327 cp += strspn(cp, " \t");
328 }
329
330 if (_resp->family[0] == -1) {
331 /* line contains errors, reset to defaults */
332 _resp->family[0] = AF_INET;
333 _resp->family[1] = AF_INET6;
334 }
335 if (_resp->family[0] == _resp->family[1])
336 _resp->family[1] = -1;
337 }
169 /* read default domain name */ 338 /* read default domain name */
170 if (!strncmp(buf, "domain", sizeof("domain") - 1)) { 339 if (MATCH(buf, "domain")) {
171 if (haveenv) /* skip if have from environ */ 340 if (haveenv) /* skip if have from environ */
172 continue; 341 continue;
173 cp = buf + sizeof("domain") - 1; 342 cp = buf + sizeof("domain") - 1;
@@ -175,18 +344,17 @@ res_init()
175 cp++; 344 cp++;
176 if ((*cp == '\0') || (*cp == '\n')) 345 if ((*cp == '\0') || (*cp == '\n'))
177 continue; 346 continue;
178 (void)strncpy(_res.defdname, cp, 347 strlcpy(_resp->defdname, cp, sizeof(_resp->defdname));
179 sizeof(_res.defdname) - 1); 348 if ((cp = strpbrk(_resp->defdname, " \t\n")) != NULL)
180 if ((cp = strpbrk(_res.defdname, " \t\n")) != NULL)
181 *cp = '\0'; 349 *cp = '\0';
182 havesearch = 0; 350 havesearch = 0;
183 continue; 351 continue;
184 } 352 }
185 /* lookup types */ 353 /* lookup types */
186 if (!strncmp(buf, "lookup", sizeof("lookup") -1)) { 354 if (MATCH(buf, "lookup")) {
187 char *sp = NULL; 355 char *sp = NULL;
188 356
189 bzero(_res.lookups, sizeof _res.lookups); 357 bzero(_resp->lookups, sizeof _resp->lookups);
190 cp = buf + sizeof("lookup") - 1; 358 cp = buf + sizeof("lookup") - 1;
191 for (n = 0;; cp++) { 359 for (n = 0;; cp++) {
192 if (n == MAXDNSLUS) 360 if (n == MAXDNSLUS)
@@ -194,14 +362,14 @@ res_init()
194 if ((*cp == '\0') || (*cp == '\n')) { 362 if ((*cp == '\0') || (*cp == '\n')) {
195 if (sp) { 363 if (sp) {
196 if (*sp=='y' || *sp=='b' || *sp=='f') 364 if (*sp=='y' || *sp=='b' || *sp=='f')
197 _res.lookups[n++] = *sp; 365 _resp->lookups[n++] = *sp;
198 sp = NULL; 366 sp = NULL;
199 } 367 }
200 break; 368 break;
201 } else if ((*cp == ' ') || (*cp == '\t') || (*cp == ',')) { 369 } else if ((*cp == ' ') || (*cp == '\t') || (*cp == ',')) {
202 if (sp) { 370 if (sp) {
203 if (*sp=='y' || *sp=='b' || *sp=='f') 371 if (*sp=='y' || *sp=='b' || *sp=='f')
204 _res.lookups[n++] = *sp; 372 _resp->lookups[n++] = *sp;
205 sp = NULL; 373 sp = NULL;
206 } 374 }
207 } else if (sp == NULL) 375 } else if (sp == NULL)
@@ -210,7 +378,7 @@ res_init()
210 continue; 378 continue;
211 } 379 }
212 /* set search list */ 380 /* set search list */
213 if (!strncmp(buf, "search", sizeof("search") - 1)) { 381 if (MATCH(buf, "search")) {
214 if (haveenv) /* skip if have from environ */ 382 if (haveenv) /* skip if have from environ */
215 continue; 383 continue;
216 cp = buf + sizeof("search") - 1; 384 cp = buf + sizeof("search") - 1;
@@ -218,18 +386,17 @@ res_init()
218 cp++; 386 cp++;
219 if ((*cp == '\0') || (*cp == '\n')) 387 if ((*cp == '\0') || (*cp == '\n'))
220 continue; 388 continue;
221 (void)strncpy(_res.defdname, cp, 389 strlcpy(_resp->defdname, cp, sizeof(_resp->defdname));
222 sizeof(_res.defdname) - 1); 390 if ((cp = strchr(_resp->defdname, '\n')) != NULL)
223 if ((cp = strchr(_res.defdname, '\n')) != NULL)
224 *cp = '\0'; 391 *cp = '\0';
225 /* 392 /*
226 * Set search list to be blank-separated strings 393 * Set search list to be blank-separated strings
227 * on rest of line. 394 * on rest of line.
228 */ 395 */
229 cp = _res.defdname; 396 cp = _resp->defdname;
230 pp = _res.dnsrch; 397 pp = _resp->dnsrch;
231 *pp++ = cp; 398 *pp++ = cp;
232 for (n = 0; *cp && pp < _res.dnsrch + MAXDNSRCH; cp++) { 399 for (n = 0; *cp && pp < _resp->dnsrch + MAXDNSRCH; cp++) {
233 if (*cp == ' ' || *cp == '\t') { 400 if (*cp == ' ' || *cp == '\t') {
234 *cp = 0; 401 *cp = 0;
235 n = 1; 402 n = 1;
@@ -247,130 +414,274 @@ res_init()
247 continue; 414 continue;
248 } 415 }
249 /* read nameservers to query */ 416 /* read nameservers to query */
250 if (!strncmp(buf, "nameserver", sizeof("nameserver") - 1) && 417 if (MATCH(buf, "nameserver") && nserv < MAXNS) {
251 nserv < MAXNS) { 418 char *q;
252 struct in_addr a; 419 struct addrinfo hints, *res;
420 char pbuf[NI_MAXSERV];
253 421
254 cp = buf + sizeof("nameserver") - 1; 422 cp = buf + sizeof("nameserver") - 1;
255 while (*cp == ' ' || *cp == '\t') 423 while (*cp == ' ' || *cp == '\t')
256 cp++; 424 cp++;
257 if ((*cp != '\0') && (*cp != '\n') && inet_aton(cp, &a)) { 425 if ((*cp == '\0') || (*cp == '\n'))
258 _res.nsaddr_list[nserv].sin_len = sizeof(struct sockaddr_in); 426 continue;
259 _res.nsaddr_list[nserv].sin_family = AF_INET; 427 for (q = cp; *q; q++) {
260 _res.nsaddr_list[nserv].sin_port = 428 if (isspace(*q)) {
261 htons(NAMESERVER_PORT); 429 *q = '\0';
262 _res.nsaddr_list[nserv].sin_addr = a; 430 break;
431 }
432 }
433
434 /* Handle addresses enclosed in [] */
435 *pbuf = '\0';
436 if (*cp == '[') {
437 cp++;
438 if ((q = strchr(cp, ']')) == NULL)
439 continue;
440 *q++ = '\0';
441 /* Extract port, if specified */
442 if (*q++ == ':') {
443 if (strlcpy(pbuf, q, sizeof(pbuf)) >= sizeof(pbuf))
444 continue;
445 }
446 }
447 if (*pbuf == '\0')
448 snprintf(pbuf, sizeof(pbuf), "%u", NAMESERVER_PORT);
449
450 memset(&hints, 0, sizeof(hints));
451 hints.ai_flags = AI_NUMERICHOST;
452 hints.ai_socktype = SOCK_DGRAM;
453 res = NULL;
454 if (getaddrinfo(cp, pbuf, &hints, &res) == 0 &&
455 res->ai_next == NULL) {
456 if (res->ai_addrlen <= sizeof(_res_extp->nsaddr_list[nserv])) {
457 memcpy(&_res_extp->nsaddr_list[nserv], res->ai_addr,
458 res->ai_addrlen);
459 } else {
460 memset(&_res_extp->nsaddr_list[nserv], 0,
461 sizeof(_res_extp->nsaddr_list[nserv]));
462 }
463 if (res->ai_addrlen <= sizeof(_resp->nsaddr_list[nserv])) {
464 memcpy(&_resp->nsaddr_list[nserv], res->ai_addr,
465 res->ai_addrlen);
466 } else {
467 memset(&_resp->nsaddr_list[nserv], 0,
468 sizeof(_resp->nsaddr_list[nserv]));
469 }
263 nserv++; 470 nserv++;
264 } 471 }
472 if (res)
473 freeaddrinfo(res);
265 continue; 474 continue;
266 } 475 }
267 if (!strncmp(buf, "sortlist", sizeof("sortlist") - 1)) { 476#ifdef RESOLVSORT
477 if (MATCH(buf, "sortlist")) {
268 struct in_addr a; 478 struct in_addr a;
479#ifdef INET6
480 struct in6_addr a6;
481 int m, i;
482 u_char *u;
483#endif /* INET6 */
269 484
270 cp = buf + sizeof("sortlist") - 1; 485 cp = buf + sizeof("sortlist") - 1;
271 while (*cp == ' ' || *cp == '\t') 486 while (nsort < MAXRESOLVSORT) {
272 cp++; 487 while (*cp == ' ' || *cp == '\t')
273 while (sscanf(cp,"%[0-9./]s", buf2) && nsort < MAXRESOLVSORT) { 488 cp++;
274 if (net = strchr(buf2, '/')) 489 if (*cp == '\0' || *cp == '\n' || *cp == ';')
275 *net = '\0'; 490 break;
276 if (inet_aton(buf2, &a)) { 491 net = cp;
277 _res.sort_list[nsort].addr = a; 492 while (*cp && !ISSORTMASK(*cp) && *cp != ';' &&
278 if (net && inet_aton(net+1, &a)) { 493 isascii(*cp) && !isspace(*cp))
279 _res.sort_list[nsort].mask = a.s_addr; 494 cp++;
495 n = *cp;
496 *cp = 0;
497 if (inet_aton(net, &a)) {
498 _resp->sort_list[nsort].addr = a;
499 if (ISSORTMASK(n)) {
500 *cp++ = n;
501 net = cp;
502 while (*cp && *cp != ';' &&
503 isascii(*cp) && !isspace(*cp))
504 cp++;
505 n = *cp;
506 *cp = 0;
507 if (inet_aton(net, &a)) {
508 _resp->sort_list[nsort].mask = a.s_addr;
509 } else {
510 _resp->sort_list[nsort].mask =
511 net_mask(_resp->sort_list[nsort].addr);
512 }
280 } else { 513 } else {
281 _res.sort_list[nsort].mask = 514 _resp->sort_list[nsort].mask =
282 net_mask(_res.sort_list[nsort].addr); 515 net_mask(_resp->sort_list[nsort].addr);
283 } 516 }
517#ifdef INET6
518 _res_extp->sort_list[nsort].af = AF_INET;
519 _res_extp->sort_list[nsort].addr.ina =
520 _resp->sort_list[nsort].addr;
521 _res_extp->sort_list[nsort].mask.ina.s_addr =
522 _resp->sort_list[nsort].mask;
523#endif /* INET6 */
284 nsort++; 524 nsort++;
285 } 525 }
286 if (net) 526#ifdef INET6
287 *net = '/'; 527 else if (inet_pton(AF_INET6, net, &a6) == 1) {
288 cp += strlen(buf2); 528 _res_extp->sort_list[nsort].af = AF_INET6;
289 while (*cp == ' ' || *cp == '\t') 529 _res_extp->sort_list[nsort].addr.in6a = a6;
290 cp++; 530 u = (u_char *)&_res_extp->sort_list[nsort].mask.in6a;
531 *cp++ = n;
532 net = cp;
533 while (*cp && *cp != ';' &&
534 isascii(*cp) && !isspace(*cp))
535 cp++;
536 m = n;
537 n = *cp;
538 *cp = 0;
539 switch (m) {
540 case '/':
541 m = atoi(net);
542 break;
543 case '&':
544 if (inet_pton(AF_INET6, net, u) == 1) {
545 m = -1;
546 break;
547 }
548 /* FALLTHROUGH */
549 default:
550 m = sizeof(struct in6_addr) * NBBY;
551 break;
552 }
553 if (m >= 0) {
554 for (i = 0; i < sizeof(struct in6_addr); i++) {
555 if (m <= 0) {
556 *u = 0;
557 } else {
558 m -= NBBY;
559 *u = (u_char)~0;
560 if (m < 0)
561 *u <<= -m;
562 }
563 u++;
564 }
565 }
566 nsort++;
567 }
568#endif /* INET6 */
569 *cp = n;
291 } 570 }
292 continue; 571 continue;
293 } 572 }
294 if (!strncmp(buf, "options", sizeof("options") -1)) { 573#endif
574 if (MATCH(buf, "options")) {
295 res_setoptions(buf + sizeof("options") - 1, "conf"); 575 res_setoptions(buf + sizeof("options") - 1, "conf");
296 continue; 576 continue;
297 } 577 }
298 } 578 }
299 if (nserv > 1) 579 if (nserv > 1)
300 _res.nscount = nserv; 580 _resp->nscount = nserv;
301 _res.nsort = nsort; 581#ifdef RESOLVSORT
582 _resp->nsort = nsort;
583#endif
302 (void) fclose(fp); 584 (void) fclose(fp);
303 } 585 }
304 if (_res.defdname[0] == 0) { 586 if (_resp->defdname[0] == 0 &&
305 if (gethostname(buf, sizeof(_res.defdname) - 1) == 0 && 587 gethostname(buf, sizeof(_resp->defdname) - 1) == 0 &&
306 (cp = strchr(buf, '.'))) 588 (cp = strchr(buf, '.')) != NULL)
307 (void)strcpy(_res.defdname, cp + 1); 589 {
590 strlcpy(_resp->defdname, cp + 1,
591 sizeof(_resp->defdname));
308 } 592 }
309 593
310 /* find components of local domain that might be searched */ 594 /* find components of local domain that might be searched */
311 if (havesearch == 0) { 595 if (havesearch == 0) {
312 pp = _res.dnsrch; 596 pp = _resp->dnsrch;
313 *pp++ = _res.defdname; 597 *pp++ = _resp->defdname;
314#ifndef SEARCH_LOCAL_DOMAINS
315 *pp = NULL; 598 *pp = NULL;
316#else 599
317 for (cp = _res.defdname, n = 0; *cp; cp++) 600#ifndef RFC1535
318 if (*cp == '.') 601 dots = 0;
319 n++; 602 for (cp = _resp->defdname; *cp; cp++)
320 cp = _res.defdname; 603 dots += (*cp == '.');
321 for (; n >= LOCALDOMAINPARTS && pp < _res.dnsrch + MAXDFLSRCH; 604
322 n--) { 605 cp = _resp->defdname;
323 cp = strchr(cp, '.'); 606 while (pp < _resp->dnsrch + MAXDFLSRCH) {
324 *pp++ = ++cp; 607 if (dots < LOCALDOMAINPARTS)
608 break;
609 cp = strchr(cp, '.') + 1; /* we know there is one */
610 *pp++ = cp;
611 dots--;
325 } 612 }
326 *pp++ = 0; 613 *pp = NULL;
327#endif 614#ifdef DEBUG
615 if (_resp->options & RES_DEBUG) {
616 printf(";; res_init()... default dnsrch list:\n");
617 for (pp = _resp->dnsrch; *pp; pp++)
618 printf(";;\t%s\n", *pp);
619 printf(";;\t..END..\n");
620 }
621#endif /* DEBUG */
622#endif /* !RFC1535 */
328 } 623 }
329 624
330 if ((cp = getenv("RES_OPTIONS")) != NULL) 625 if (issetugid())
626 _resp->options |= RES_NOALIASES;
627 else if ((cp = getenv("RES_OPTIONS")) != NULL)
331 res_setoptions(cp, "env"); 628 res_setoptions(cp, "env");
332 _res.options |= RES_INIT; 629 _resp->options |= RES_INIT;
333 return (0); 630 return (0);
334} 631}
335 632
633/* ARGSUSED */
336static void 634static void
337res_setoptions(options, source) 635res_setoptions(char *options, char *source)
338 char *options, *source;
339{ 636{
637 struct __res_state *_resp = _THREAD_PRIVATE(_res, _res, &_res);
340 char *cp = options; 638 char *cp = options;
341 int i; 639 char *endp;
640 long l;
342 641
343#ifdef DEBUG 642#ifdef DEBUG
344 if (_res.options & RES_DEBUG) { 643 if (_resp->options & RES_DEBUG)
345 printf(";; res_setoptions(\"%s\", \"%s\")...\n", 644 printf(";; res_setoptions(\"%s\", \"%s\")...\n",
346 options, source); 645 options, source);
347 }
348#endif 646#endif
349 while (*cp) { 647 while (*cp) {
350 /* skip leading and inner runs of spaces */ 648 /* skip leading and inner runs of spaces */
351 while (*cp == ' ' || *cp == '\t') 649 while (*cp == ' ' || *cp == '\t')
352 cp++; 650 cp++;
353 /* search for and process individual options */ 651 /* search for and process individual options */
354 if (!strncmp(cp, "ndots:", sizeof("ndots:")-1)) { 652 if (!strncmp(cp, "ndots:", sizeof("ndots:") - 1)) {
355 i = atoi(cp + sizeof("ndots:") - 1); 653 char *p = cp + sizeof("ndots:") - 1;
356 if (i <= RES_MAXNDOTS) 654 l = strtol(p, &endp, 10);
357 _res.ndots = i; 655 if (l >= 0 && endp != p &&
358 else 656 (*endp = '\0' || isspace(*endp))) {
359 _res.ndots = RES_MAXNDOTS; 657 if (l <= RES_MAXNDOTS)
658 _resp->ndots = l;
659 else
660 _resp->ndots = RES_MAXNDOTS;
360#ifdef DEBUG 661#ifdef DEBUG
361 if (_res.options & RES_DEBUG) { 662 if (_resp->options & RES_DEBUG)
362 printf(";;\tndots=%d\n", _res.ndots); 663 printf(";;\tndots=%u\n", _resp->ndots);
363 }
364#endif 664#endif
365 } else if (!strncmp(cp, "debug", sizeof("debug")-1)) { 665 }
666 } else if (!strncmp(cp, "debug", sizeof("debug") - 1)) {
366#ifdef DEBUG 667#ifdef DEBUG
367 if (!(_res.options & RES_DEBUG)) { 668 if (!(_resp->options & RES_DEBUG)) {
368 printf(";; res_setoptions(\"%s\", \"%s\")..\n", 669 printf(";; res_setoptions(\"%s\", \"%s\")..\n",
369 options, source); 670 options, source);
370 _res.options |= RES_DEBUG; 671 _resp->options |= RES_DEBUG;
371 } 672 }
372 printf(";;\tdebug\n"); 673 printf(";;\tdebug\n");
373#endif 674#endif
675 } else if (!strncmp(cp, "inet6", sizeof("inet6") - 1)) {
676 _resp->options |= RES_USE_INET6;
677 } else if (!strncmp(cp, "insecure1", sizeof("insecure1") - 1)) {
678 _resp->options |= RES_INSECURE1;
679 } else if (!strncmp(cp, "insecure2", sizeof("insecure2") - 1)) {
680 _resp->options |= RES_INSECURE2;
681 } else if (!strncmp(cp, "edns0", sizeof("edns0") - 1)) {
682 _resp->options |= RES_USE_EDNS0;
683 } else if (!strncmp(cp, "tcp", sizeof("tcp") - 1)) {
684 _resp->options |= RES_USEVC;
374 } else { 685 } else {
375 /* XXX - print a warning here? */ 686 /* XXX - print a warning here? */
376 } 687 }
@@ -380,15 +691,17 @@ res_setoptions(options, source)
380 } 691 }
381} 692}
382 693
694#ifdef RESOLVSORT
695/* XXX - should really support CIDR which means explicit masks always. */
383static u_int32_t 696static u_int32_t
384net_mask(in) /* XXX - should really use system's version of this */ 697net_mask(struct in_addr in) /* XXX - should really use system's version of this */
385 struct in_addr in;
386{ 698{
387 register u_int32_t i = ntohl(in.s_addr); 699 u_int32_t i = ntohl(in.s_addr);
388 700
389 if (IN_CLASSA(i)) 701 if (IN_CLASSA(i))
390 return (htonl(IN_CLASSA_NET)); 702 return (htonl(IN_CLASSA_NET));
391 if (IN_CLASSB(i)) 703 else if (IN_CLASSB(i))
392 return (htonl(IN_CLASSB_NET)); 704 return (htonl(IN_CLASSB_NET));
393 return (htonl(IN_CLASSC_NET)); 705 return (htonl(IN_CLASSC_NET));
394} 706}
707#endif
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-11-03 05:52:23 +0000