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Commit | Line | Data |
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b9c65d09 | 1 | /* Copyright (C) 1993, 1995-2005, 2006 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
fa0bc87c RM |
3 | Contributed by David Mosberger (davidm@azstarnet.com). |
4 | ||
c84142e8 | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
fa0bc87c | 9 | |
c84142e8 UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
fa0bc87c | 14 | |
41bdb6e2 AJ |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
fa0bc87c RM |
19 | |
20 | /* This file provides a Linux /etc/host.conf compatible front end to | |
f720d3d2 UD |
21 | the various name resolvers (/etc/hosts, named, NIS server, etc.). |
22 | Though mostly compatibly, the following differences exist compared | |
23 | to the original implementation: | |
fa0bc87c RM |
24 | |
25 | - new command "spoof" takes an arguments like RESOLV_SPOOF_CHECK | |
26 | environment variable (i.e., `off', `nowarn', or `warn'). | |
27 | ||
28 | - line comments can appear anywhere (not just at the beginning of | |
29 | a line) | |
30 | */ | |
f720d3d2 | 31 | |
9be31a51 | 32 | #include <assert.h> |
f720d3d2 | 33 | #include <errno.h> |
fa0bc87c | 34 | #include <ctype.h> |
51028f34 | 35 | #include <libintl.h> |
fa0bc87c RM |
36 | #include <memory.h> |
37 | #include <stdio.h> | |
2706ee38 | 38 | #include <stdio_ext.h> |
fa0bc87c RM |
39 | #include <stdlib.h> |
40 | #include <string.h> | |
5edb9387 | 41 | #include <net/if.h> |
f720d3d2 UD |
42 | #include <sys/ioctl.h> |
43 | #include <unistd.h> | |
44 | #include <netinet/in.h> | |
45 | #include <bits/libc-lock.h> | |
46 | #include "ifreq.h" | |
fa0bc87c | 47 | #include "res_hconf.h" |
51028f34 UD |
48 | #ifdef USE_IN_LIBIO |
49 | # include <wchar.h> | |
50 | #endif | |
fa0bc87c RM |
51 | |
52 | #define _PATH_HOSTCONF "/etc/host.conf" | |
53 | ||
54 | /* Environment vars that all user to override default behavior: */ | |
55 | #define ENV_HOSTCONF "RESOLV_HOST_CONF" | |
fa0bc87c RM |
56 | #define ENV_SPOOF "RESOLV_SPOOF_CHECK" |
57 | #define ENV_TRIM_OVERR "RESOLV_OVERRIDE_TRIM_DOMAINS" | |
58 | #define ENV_TRIM_ADD "RESOLV_ADD_TRIM_DOMAINS" | |
59 | #define ENV_MULTI "RESOLV_MULTI" | |
60 | #define ENV_REORDER "RESOLV_REORDER" | |
61 | ||
bc054367 UD |
62 | enum parse_cbs |
63 | { | |
64 | CB_none, | |
65 | CB_arg_trimdomain_list, | |
66 | CB_arg_spoof, | |
67 | CB_arg_bool | |
68 | }; | |
5edb9387 | 69 | |
545f1b11 | 70 | static const struct cmd |
5edb9387 | 71 | { |
bc054367 UD |
72 | const char name[11]; |
73 | uint8_t cb; | |
5edb9387 UD |
74 | unsigned int arg; |
75 | } cmd[] = | |
76 | { | |
bc054367 UD |
77 | {"order", CB_none, 0}, |
78 | {"trim", CB_arg_trimdomain_list, 0}, | |
79 | {"spoof", CB_arg_spoof, 0}, | |
80 | {"multi", CB_arg_bool, HCONF_FLAG_MULTI}, | |
81 | {"nospoof", CB_arg_bool, HCONF_FLAG_SPOOF}, | |
82 | {"spoofalert", CB_arg_bool, HCONF_FLAG_SPOOFALERT}, | |
83 | {"reorder", CB_arg_bool, HCONF_FLAG_REORDER} | |
fa0bc87c RM |
84 | }; |
85 | ||
5edb9387 UD |
86 | /* Structure containing the state. */ |
87 | struct hconf _res_hconf; | |
fa0bc87c | 88 | |
fa0bc87c RM |
89 | /* Skip white space. */ |
90 | static const char * | |
5edb9387 | 91 | skip_ws (const char *str) |
fa0bc87c RM |
92 | { |
93 | while (isspace (*str)) ++str; | |
94 | return str; | |
95 | } | |
96 | ||
97 | ||
98 | /* Skip until whitespace, comma, end of line, or comment character. */ | |
99 | static const char * | |
5edb9387 | 100 | skip_string (const char *str) |
fa0bc87c | 101 | { |
5edb9387 UD |
102 | while (*str && !isspace (*str) && *str != '#' && *str != ',') |
103 | ++str; | |
fa0bc87c RM |
104 | return str; |
105 | } | |
106 | ||
107 | ||
a334319f | 108 | static const char * |
bc054367 | 109 | arg_trimdomain_list (const char *fname, int line_num, const char *args) |
fa0bc87c RM |
110 | { |
111 | const char * start; | |
112 | size_t len; | |
113 | ||
114 | do | |
115 | { | |
116 | start = args; | |
117 | args = skip_string (args); | |
118 | len = args - start; | |
119 | ||
120 | if (_res_hconf.num_trimdomains >= TRIMDOMAINS_MAX) | |
121 | { | |
51028f34 UD |
122 | char *buf; |
123 | ||
322861e8 | 124 | if (__asprintf (&buf, _("\ |
51028f34 | 125 | %s: line %d: cannot specify more than %d trim domains"), |
322861e8 UD |
126 | fname, line_num, TRIMDOMAINS_MAX) < 0) |
127 | return 0; | |
51028f34 | 128 | |
8a259a23 | 129 | __fxprintf (NULL, "%s", buf); |
51028f34 | 130 | |
df6f8969 | 131 | free (buf); |
fa0bc87c RM |
132 | return 0; |
133 | } | |
134 | _res_hconf.trimdomain[_res_hconf.num_trimdomains++] = | |
5edb9387 | 135 | __strndup (start, len); |
fa0bc87c RM |
136 | args = skip_ws (args); |
137 | switch (*args) | |
138 | { | |
139 | case ',': case ';': case ':': | |
140 | args = skip_ws (++args); | |
141 | if (!*args || *args == '#') | |
142 | { | |
51028f34 UD |
143 | char *buf; |
144 | ||
322861e8 | 145 | if (__asprintf (&buf, _("\ |
51028f34 | 146 | %s: line %d: list delimiter not followed by domain"), |
322861e8 UD |
147 | fname, line_num) < 0) |
148 | return 0; | |
51028f34 | 149 | |
8a259a23 | 150 | __fxprintf (NULL, "%s", buf); |
51028f34 UD |
151 | |
152 | free (buf); | |
fa0bc87c RM |
153 | return 0; |
154 | } | |
155 | default: | |
156 | break; | |
157 | } | |
158 | } | |
159 | while (*args && *args != '#'); | |
160 | return args; | |
161 | } | |
162 | ||
163 | ||
164 | static const char * | |
bc054367 | 165 | arg_spoof (const char *fname, int line_num, const char *args) |
fa0bc87c | 166 | { |
5edb9387 | 167 | const char *start = args; |
fa0bc87c RM |
168 | size_t len; |
169 | ||
170 | args = skip_string (args); | |
171 | len = args - start; | |
172 | ||
5edb9387 | 173 | if (len == 3 && __strncasecmp (start, "off", len) == 0) |
fa0bc87c RM |
174 | _res_hconf.flags &= ~(HCONF_FLAG_SPOOF | HCONF_FLAG_SPOOFALERT); |
175 | else | |
176 | { | |
177 | _res_hconf.flags |= (HCONF_FLAG_SPOOF | HCONF_FLAG_SPOOFALERT); | |
5edb9387 UD |
178 | if ((len == 6 && __strncasecmp (start, "nowarn", len) == 0) |
179 | || !(len == 4 && __strncasecmp (start, "warn", len) == 0)) | |
fa0bc87c RM |
180 | _res_hconf.flags &= ~HCONF_FLAG_SPOOFALERT; |
181 | } | |
182 | return args; | |
183 | } | |
184 | ||
185 | ||
186 | static const char * | |
5edb9387 | 187 | arg_bool (const char *fname, int line_num, const char *args, unsigned flag) |
fa0bc87c | 188 | { |
5edb9387 | 189 | if (__strncasecmp (args, "on", 2) == 0) |
fa0bc87c RM |
190 | { |
191 | args += 2; | |
192 | _res_hconf.flags |= flag; | |
193 | } | |
5edb9387 | 194 | else if (__strncasecmp (args, "off", 3) == 0) |
fa0bc87c RM |
195 | { |
196 | args += 3; | |
197 | _res_hconf.flags &= ~flag; | |
198 | } | |
199 | else | |
200 | { | |
51028f34 UD |
201 | char *buf; |
202 | ||
322861e8 UD |
203 | if (__asprintf (&buf, |
204 | _("%s: line %d: expected `on' or `off', found `%s'\n"), | |
205 | fname, line_num, args) < 0) | |
206 | return 0; | |
51028f34 | 207 | |
8a259a23 | 208 | __fxprintf (NULL, "%s", buf); |
51028f34 UD |
209 | |
210 | free (buf); | |
fa0bc87c RM |
211 | return 0; |
212 | } | |
213 | return args; | |
214 | } | |
215 | ||
216 | ||
217 | static void | |
5edb9387 | 218 | parse_line (const char *fname, int line_num, const char *str) |
fa0bc87c | 219 | { |
5edb9387 | 220 | const char *start; |
545f1b11 | 221 | const struct cmd *c = 0; |
fa0bc87c | 222 | size_t len; |
57b36a0a | 223 | size_t i; |
fa0bc87c RM |
224 | |
225 | str = skip_ws (str); | |
226 | ||
6dc25b55 UD |
227 | /* skip line comment and empty lines: */ |
228 | if (*str == '\0' || *str == '#') return; | |
fa0bc87c RM |
229 | |
230 | start = str; | |
231 | str = skip_string (str); | |
232 | len = str - start; | |
233 | ||
234 | for (i = 0; i < sizeof (cmd) / sizeof (cmd[0]); ++i) | |
235 | { | |
4aebaa6b | 236 | if (__strncasecmp (start, cmd[i].name, len) == 0 |
fa0bc87c RM |
237 | && strlen (cmd[i].name) == len) |
238 | { | |
239 | c = &cmd[i]; | |
240 | break; | |
241 | } | |
242 | } | |
5edb9387 | 243 | if (c == NULL) |
fa0bc87c | 244 | { |
51028f34 UD |
245 | char *buf; |
246 | ||
322861e8 UD |
247 | if (__asprintf (&buf, _("%s: line %d: bad command `%s'\n"), |
248 | fname, line_num, start) < 0) | |
249 | return; | |
51028f34 | 250 | |
8a259a23 | 251 | __fxprintf (NULL, "%s", buf); |
51028f34 UD |
252 | |
253 | free (buf); | |
fa0bc87c RM |
254 | return; |
255 | } | |
256 | ||
257 | /* process args: */ | |
258 | str = skip_ws (str); | |
bc054367 UD |
259 | |
260 | if (c->cb == CB_arg_trimdomain_list) | |
261 | str = arg_trimdomain_list (fname, line_num, str); | |
262 | else if (c->cb == CB_arg_spoof) | |
263 | str = arg_spoof (fname, line_num, str); | |
264 | else if (c->cb == CB_arg_bool) | |
265 | str = arg_bool (fname, line_num, str, c->arg); | |
266 | else | |
267 | /* Ignore the line. */ | |
268 | return; | |
269 | ||
fa0bc87c RM |
270 | if (!str) |
271 | return; | |
272 | ||
273 | /* rest of line must contain white space or comment only: */ | |
274 | while (*str) | |
275 | { | |
276 | if (!isspace (*str)) { | |
277 | if (*str != '#') | |
51028f34 UD |
278 | { |
279 | char *buf; | |
280 | ||
322861e8 UD |
281 | if (__asprintf (&buf, |
282 | _("%s: line %d: ignoring trailing garbage `%s'\n"), | |
283 | fname, line_num, str) < 0) | |
284 | break; | |
51028f34 | 285 | |
8a259a23 | 286 | __fxprintf (NULL, "%s", buf); |
51028f34 UD |
287 | |
288 | free (buf); | |
289 | } | |
fa0bc87c RM |
290 | break; |
291 | } | |
292 | ++str; | |
293 | } | |
294 | } | |
295 | ||
296 | ||
9d957ce2 UD |
297 | static void |
298 | do_init (void) | |
fa0bc87c | 299 | { |
5edb9387 | 300 | const char *hconf_name; |
fa0bc87c | 301 | int line_num = 0; |
2c68584c | 302 | char buf[256], *envval; |
5edb9387 | 303 | FILE *fp; |
fa0bc87c | 304 | |
5edb9387 | 305 | memset (&_res_hconf, '\0', sizeof (_res_hconf)); |
fa0bc87c | 306 | |
74955460 | 307 | hconf_name = getenv (ENV_HOSTCONF); |
5edb9387 | 308 | if (hconf_name == NULL) |
fa0bc87c RM |
309 | hconf_name = _PATH_HOSTCONF; |
310 | ||
ee8449f7 | 311 | fp = fopen (hconf_name, "rc"); |
b9c65d09 | 312 | if (fp) |
fa0bc87c | 313 | { |
2706ee38 UD |
314 | /* No threads using this stream. */ |
315 | __fsetlocking (fp, FSETLOCKING_BYCALLER); | |
316 | ||
5edb9387 | 317 | while (fgets_unlocked (buf, sizeof (buf), fp)) |
fa0bc87c RM |
318 | { |
319 | ++line_num; | |
c4563d2d | 320 | *__strchrnul (buf, '\n') = '\0'; |
fa0bc87c RM |
321 | parse_line (hconf_name, line_num, buf); |
322 | } | |
323 | fclose (fp); | |
324 | } | |
325 | ||
fa0bc87c RM |
326 | envval = getenv (ENV_SPOOF); |
327 | if (envval) | |
bc054367 | 328 | arg_spoof (ENV_SPOOF, 1, envval); |
fa0bc87c RM |
329 | |
330 | envval = getenv (ENV_MULTI); | |
331 | if (envval) | |
332 | arg_bool (ENV_MULTI, 1, envval, HCONF_FLAG_MULTI); | |
333 | ||
334 | envval = getenv (ENV_REORDER); | |
335 | if (envval) | |
336 | arg_bool (ENV_REORDER, 1, envval, HCONF_FLAG_REORDER); | |
337 | ||
338 | envval = getenv (ENV_TRIM_ADD); | |
339 | if (envval) | |
bc054367 | 340 | arg_trimdomain_list (ENV_TRIM_ADD, 1, envval); |
fa0bc87c RM |
341 | |
342 | envval = getenv (ENV_TRIM_OVERR); | |
343 | if (envval) | |
344 | { | |
345 | _res_hconf.num_trimdomains = 0; | |
bc054367 | 346 | arg_trimdomain_list (ENV_TRIM_OVERR, 1, envval); |
fa0bc87c | 347 | } |
5edb9387 UD |
348 | |
349 | _res_hconf.initialized = 1; | |
fa0bc87c RM |
350 | } |
351 | ||
352 | ||
9d957ce2 UD |
353 | /* Initialize hconf datastructure by reading host.conf file and |
354 | environment variables. */ | |
355 | void | |
356 | _res_hconf_init (void) | |
357 | { | |
358 | __libc_once_define (static, once); | |
359 | ||
360 | __libc_once (once, do_init); | |
361 | } | |
362 | ||
363 | ||
f720d3d2 | 364 | /* List of known interfaces. */ |
c877418f | 365 | libc_freeres_ptr ( |
f720d3d2 UD |
366 | static struct netaddr |
367 | { | |
368 | int addrtype; | |
369 | union | |
370 | { | |
371 | struct | |
372 | { | |
373 | u_int32_t addr; | |
374 | u_int32_t mask; | |
375 | } ipv4; | |
376 | } u; | |
c877418f | 377 | } *ifaddrs); |
f720d3d2 UD |
378 | |
379 | /* We need to protect the dynamic buffer handling. */ | |
380 | __libc_lock_define_initialized (static, lock); | |
381 | ||
fa0bc87c RM |
382 | /* Reorder addresses returned in a hostent such that the first address |
383 | is an address on the local subnet, if there is such an address. | |
f720d3d2 UD |
384 | Otherwise, nothing is changed. |
385 | ||
386 | Note that this function currently only handles IPv4 addresses. */ | |
fa0bc87c RM |
387 | |
388 | void | |
5edb9387 | 389 | _res_hconf_reorder_addrs (struct hostent *hp) |
fa0bc87c | 390 | { |
5edb9387 | 391 | #if defined SIOCGIFCONF && defined SIOCGIFNETMASK |
f720d3d2 UD |
392 | int i, j; |
393 | /* Number of interfaces. */ | |
394 | static int num_ifs = -1; | |
fa0bc87c | 395 | |
f720d3d2 UD |
396 | /* Only reorder if we're supposed to. */ |
397 | if ((_res_hconf.flags & HCONF_FLAG_REORDER) == 0) | |
398 | return; | |
4aebaa6b | 399 | |
f720d3d2 | 400 | /* Can't deal with anything but IPv4 for now... */ |
fa0bc87c | 401 | if (hp->h_addrtype != AF_INET) |
f720d3d2 | 402 | return; |
fa0bc87c RM |
403 | |
404 | if (num_ifs <= 0) | |
405 | { | |
f720d3d2 UD |
406 | struct ifreq *ifr, *cur_ifr; |
407 | int sd, num, i; | |
408 | /* Save errno. */ | |
409 | int save = errno; | |
4aebaa6b | 410 | |
f720d3d2 | 411 | /* Initialize interface table. */ |
fa0bc87c RM |
412 | |
413 | num_ifs = 0; | |
414 | ||
7f1deee6 RM |
415 | /* The SIOCGIFNETMASK ioctl will only work on an AF_INET socket. */ |
416 | sd = __socket (AF_INET, SOCK_DGRAM, 0); | |
fa0bc87c RM |
417 | if (sd < 0) |
418 | return; | |
419 | ||
f720d3d2 UD |
420 | /* Get lock. */ |
421 | __libc_lock_lock (lock); | |
fa0bc87c | 422 | |
f720d3d2 | 423 | /* Get a list of interfaces. */ |
7f1deee6 | 424 | __ifreq (&ifr, &num, sd); |
f720d3d2 UD |
425 | if (!ifr) |
426 | goto cleanup; | |
fa0bc87c RM |
427 | |
428 | ifaddrs = malloc (num * sizeof (ifaddrs[0])); | |
429 | if (!ifaddrs) | |
f720d3d2 | 430 | goto cleanup1; |
4aebaa6b | 431 | |
f720d3d2 | 432 | /* Copy usable interfaces in ifaddrs structure. */ |
9db6ee8d | 433 | for (cur_ifr = ifr, i = 0; i < num; cur_ifr = __if_nextreq (cur_ifr), ++i) |
5edb9387 | 434 | { |
f720d3d2 | 435 | if (cur_ifr->ifr_addr.sa_family != AF_INET) |
5edb9387 | 436 | continue; |
4aebaa6b | 437 | |
5edb9387 | 438 | ifaddrs[num_ifs].addrtype = AF_INET; |
f720d3d2 UD |
439 | ifaddrs[num_ifs].u.ipv4.addr = |
440 | ((struct sockaddr_in *) &cur_ifr->ifr_addr)->sin_addr.s_addr; | |
fa0bc87c | 441 | |
f720d3d2 | 442 | if (__ioctl (sd, SIOCGIFNETMASK, cur_ifr) < 0) |
5edb9387 | 443 | continue; |
fa0bc87c | 444 | |
f720d3d2 UD |
445 | ifaddrs[num_ifs].u.ipv4.mask = |
446 | ((struct sockaddr_in *) &cur_ifr->ifr_netmask)->sin_addr.s_addr; | |
447 | ||
448 | /* Now we're committed to this entry. */ | |
449 | ++num_ifs; | |
5edb9387 | 450 | } |
f720d3d2 | 451 | /* Just keep enough memory to hold all the interfaces we want. */ |
fa0bc87c | 452 | ifaddrs = realloc (ifaddrs, num_ifs * sizeof (ifaddrs[0])); |
9be31a51 | 453 | assert (ifaddrs != NULL); |
fa0bc87c | 454 | |
f720d3d2 | 455 | cleanup1: |
7f1deee6 | 456 | __if_freereq (ifr, num); |
f720d3d2 | 457 | |
fa0bc87c | 458 | cleanup: |
f720d3d2 UD |
459 | /* Release lock, preserve error value, and close socket. */ |
460 | save = errno; | |
461 | __libc_lock_unlock (lock); | |
4aebaa6b | 462 | __close (sd); |
fa0bc87c RM |
463 | } |
464 | ||
465 | if (num_ifs == 0) | |
466 | return; | |
467 | ||
f720d3d2 | 468 | /* Find an address for which we have a direct connection. */ |
fa0bc87c RM |
469 | for (i = 0; hp->h_addr_list[i]; ++i) |
470 | { | |
f720d3d2 | 471 | struct in_addr *haddr = (struct in_addr *) hp->h_addr_list[i]; |
fa0bc87c RM |
472 | |
473 | for (j = 0; j < num_ifs; ++j) | |
474 | { | |
f720d3d2 UD |
475 | u_int32_t if_addr = ifaddrs[j].u.ipv4.addr; |
476 | u_int32_t if_netmask = ifaddrs[j].u.ipv4.mask; | |
fa0bc87c | 477 | |
f720d3d2 | 478 | if (((haddr->s_addr ^ if_addr) & if_netmask) == 0) |
fa0bc87c | 479 | { |
5edb9387 | 480 | void *tmp; |
fa0bc87c | 481 | |
5edb9387 | 482 | tmp = hp->h_addr_list[i]; |
fa0bc87c RM |
483 | hp->h_addr_list[i] = hp->h_addr_list[0]; |
484 | hp->h_addr_list[0] = tmp; | |
485 | return; | |
486 | } | |
487 | } | |
488 | } | |
489 | #endif /* defined(SIOCGIFCONF) && ... */ | |
490 | } | |
491 | ||
492 | ||
493 | /* If HOSTNAME has a postfix matching any of the trimdomains, trim away | |
494 | that postfix. Notice that HOSTNAME is modified inplace. Also, the | |
495 | original code applied all trimdomains in order, meaning that the | |
496 | same domainname could be trimmed multiple times. I believe this | |
497 | was unintentional. */ | |
498 | void | |
5edb9387 | 499 | _res_hconf_trim_domain (char *hostname) |
fa0bc87c RM |
500 | { |
501 | size_t hostname_len, trim_len; | |
502 | int i; | |
503 | ||
5edb9387 | 504 | hostname_len = strlen (hostname); |
fa0bc87c RM |
505 | |
506 | for (i = 0; i < _res_hconf.num_trimdomains; ++i) | |
507 | { | |
5edb9387 | 508 | const char *trim = _res_hconf.trimdomain[i]; |
fa0bc87c | 509 | |
5edb9387 | 510 | trim_len = strlen (trim); |
fa0bc87c | 511 | if (hostname_len > trim_len |
5edb9387 | 512 | && __strcasecmp (&hostname[hostname_len - trim_len], trim) == 0) |
fa0bc87c RM |
513 | { |
514 | hostname[hostname_len - trim_len] = '\0'; | |
515 | break; | |
516 | } | |
517 | } | |
518 | } | |
519 | ||
520 | ||
521 | /* Trim all hostnames/aliases in HP according to the trimdomain list. | |
522 | Notice that HP is modified inplace! */ | |
523 | void | |
5edb9387 | 524 | _res_hconf_trim_domains (struct hostent *hp) |
fa0bc87c RM |
525 | { |
526 | int i; | |
527 | ||
528 | if (_res_hconf.num_trimdomains == 0) | |
529 | return; | |
530 | ||
531 | _res_hconf_trim_domain (hp->h_name); | |
532 | for (i = 0; hp->h_aliases[i]; ++i) | |
533 | _res_hconf_trim_domain (hp->h_aliases[i]); | |
534 | } |