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1 | /* | |
2 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. Neither the name of the project nor the names of its contributors | |
14 | * may be used to endorse or promote products derived from this software | |
15 | * without specific prior written permission. | |
16 | * | |
17 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND | |
18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE | |
21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
27 | * SUCH DAMAGE. | |
28 | */ | |
29 | ||
30 | #ifdef _WIN32 | |
31 | #include <rb_lib.h> | |
32 | #include "getaddrinfo.h" | |
33 | ||
34 | /* $Id$ */ | |
35 | ||
36 | static const char in_addrany[] = { 0, 0, 0, 0 }; | |
37 | static const char in_loopback[] = { 127, 0, 0, 1 }; | |
38 | static const char in6_addrany[] = { | |
39 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
40 | }; | |
41 | static const char in6_loopback[] = { | |
42 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 | |
43 | }; | |
44 | ||
45 | static const struct afd { | |
46 | int a_af; | |
47 | int a_addrlen; | |
48 | int a_socklen; | |
49 | int a_off; | |
50 | const char *a_addrany; | |
51 | const char *a_loopback; | |
52 | int a_scoped; | |
53 | } afdl [] = { | |
54 | #define N_INET6 0 | |
55 | #ifdef IPV6 | |
56 | {PF_INET6, sizeof(struct in6_addr), | |
57 | sizeof(struct sockaddr_in6), | |
58 | offsetof(struct sockaddr_in6, sin6_addr), | |
59 | in6_addrany, in6_loopback, 1}, | |
60 | #endif | |
61 | #define N_INET 1 | |
62 | {PF_INET, sizeof(struct in_addr), | |
63 | sizeof(struct sockaddr_in), | |
64 | offsetof(struct sockaddr_in, sin_addr), | |
65 | in_addrany, in_loopback, 0}, | |
66 | {0, 0, 0, 0, NULL, NULL, 0}, | |
67 | }; | |
68 | ||
69 | struct explore { | |
70 | int e_af; | |
71 | int e_socktype; | |
72 | int e_protocol; | |
73 | const char *e_protostr; | |
74 | int e_wild; | |
75 | #define WILD_AF(ex) ((ex)->e_wild & 0x01) | |
76 | #define WILD_SOCKTYPE(ex) ((ex)->e_wild & 0x02) | |
77 | #define WILD_PROTOCOL(ex) ((ex)->e_wild & 0x04) | |
78 | }; | |
79 | ||
80 | static const struct explore explore[] = { | |
81 | #ifdef IPV6 | |
82 | { PF_INET6, SOCK_DGRAM, IPPROTO_UDP, "udp", 0x07 }, | |
83 | { PF_INET6, SOCK_STREAM, IPPROTO_TCP, "tcp", 0x07 }, | |
84 | { PF_INET6, SOCK_RAW, ANY, NULL, 0x05 }, | |
85 | #endif | |
86 | { PF_INET, SOCK_DGRAM, IPPROTO_UDP, "udp", 0x07 }, | |
87 | { PF_INET, SOCK_STREAM, IPPROTO_TCP, "tcp", 0x07 }, | |
88 | { PF_INET, SOCK_RAW, ANY, NULL, 0x05 }, | |
89 | { PF_UNSPEC, SOCK_DGRAM, IPPROTO_UDP, "udp", 0x07 }, | |
90 | { PF_UNSPEC, SOCK_STREAM, IPPROTO_TCP, "tcp", 0x07 }, | |
91 | { PF_UNSPEC, SOCK_RAW, ANY, NULL, 0x05 }, | |
92 | { -1, 0, 0, NULL, 0 }, | |
93 | }; | |
94 | ||
95 | #define PTON_MAX 16 | |
96 | ||
97 | static int str_isnumber(const char *); | |
98 | static int explore_null(const struct rb_addrinfo *, | |
99 | const char *, struct rb_addrinfo **); | |
100 | static int explore_numeric(const struct rb_addrinfo *, const char *, | |
101 | const char *, struct rb_addrinfo **); | |
102 | static struct rb_addrinfo *get_ai(const struct rb_addrinfo *, | |
103 | const struct afd *, const char *); | |
104 | static int get_portmatch(const struct rb_addrinfo *, const char *); | |
105 | static int get_port(struct rb_addrinfo *, const char *, int); | |
106 | static const struct afd *find_afd(int); | |
107 | #if 0 | |
108 | /* We will need this should we ever want gai_strerror() */ | |
109 | static char *ai_errlist[] = { | |
110 | "Success", | |
111 | "Address family for hostname not supported", /* EAI_ADDRFAMILY */ | |
112 | "Temporary failure in name resolution", /* EAI_AGAIN */ | |
113 | "Invalid value for ai_flags", /* EAI_BADFLAGS */ | |
114 | "Non-recoverable failure in name resolution", /* EAI_FAIL */ | |
115 | "ai_family not supported", /* EAI_FAMILY */ | |
116 | "Memory allocation failure", /* EAI_MEMORY */ | |
117 | "No address associated with hostname", /* EAI_NODATA */ | |
118 | "hostname nor servname provided, or not known", /* EAI_NONAME */ | |
119 | "servname not supported for ai_socktype", /* EAI_SERVICE */ | |
120 | "ai_socktype not supported", /* EAI_SOCKTYPE */ | |
121 | "System error returned in errno", /* EAI_SYSTEM */ | |
122 | "Invalid value for hints", /* EAI_BADHINTS */ | |
123 | "Resolved protocol is unknown", /* EAI_PROTOCOL */ | |
124 | "Unknown error", /* EAI_MAX */ | |
125 | }; | |
126 | #endif | |
127 | /* XXX macros that make external reference is BAD. */ | |
128 | ||
129 | #define GET_AI(ai, afd, addr) \ | |
130 | do { \ | |
131 | /* external reference: pai, error, and label free */ \ | |
132 | (ai) = get_ai(pai, (afd), (addr)); \ | |
133 | if ((ai) == NULL) { \ | |
134 | error = EAI_MEMORY; \ | |
135 | goto free; \ | |
136 | } \ | |
137 | } while (/*CONSTCOND*/0) | |
138 | ||
139 | #define GET_PORT(ai, serv) \ | |
140 | do { \ | |
141 | /* external reference: error and label free */ \ | |
142 | error = get_port((ai), (serv), 0); \ | |
143 | if (error != 0) \ | |
144 | goto free; \ | |
145 | } while (/*CONSTCOND*/0) | |
146 | ||
147 | #define ERR(err) \ | |
148 | do { \ | |
149 | /* external reference: error, and label bad */ \ | |
150 | error = (err); \ | |
151 | goto bad; \ | |
152 | /*NOTREACHED*/ \ | |
153 | } while (/*CONSTCOND*/0) | |
154 | ||
155 | #define MATCH_FAMILY(x, y, w) \ | |
156 | ((x) == (y) || (/*CONSTCOND*/(w) && ((x) == PF_UNSPEC || (y) == PF_UNSPEC))) | |
157 | #define MATCH(x, y, w) \ | |
158 | ((x) == (y) || (/*CONSTCOND*/(w) && ((x) == ANY || (y) == ANY))) | |
159 | ||
160 | #if 0 | |
161 | /* We will need this should we ever want gai_strerror() */ | |
162 | char * | |
163 | gai_strerror(int ecode) | |
164 | { | |
165 | if (ecode < 0 || ecode > EAI_MAX) | |
166 | ecode = EAI_MAX; | |
167 | return ai_errlist[ecode]; | |
168 | } | |
169 | #endif | |
170 | ||
171 | void | |
172 | rb_freeaddrinfo(struct rb_addrinfo *ai) | |
173 | { | |
174 | struct rb_addrinfo *next; | |
175 | ||
176 | do { | |
177 | next = ai->ai_next; | |
178 | if (ai->ai_canonname) | |
179 | rb_free(ai->ai_canonname); | |
180 | /* no need to free(ai->ai_addr) */ | |
181 | rb_free(ai); | |
182 | ai = next; | |
183 | } while (ai); | |
184 | } | |
185 | ||
186 | static int | |
187 | str_isnumber(const char *p) | |
188 | { | |
189 | char *ep; | |
190 | ||
191 | if (*p == '\0') | |
192 | return NO; | |
193 | ep = NULL; | |
194 | errno = 0; | |
195 | (void)strtoul(p, &ep, 10); | |
196 | if (errno == 0 && ep && *ep == '\0') | |
197 | return YES; | |
198 | else | |
199 | return NO; | |
200 | } | |
201 | ||
202 | int | |
203 | rb_getaddrinfo(const char *hostname, const char *servname, | |
204 | const struct rb_addrinfo *hints, struct rb_addrinfo **res) | |
205 | { | |
206 | struct rb_addrinfo sentinel; | |
207 | struct rb_addrinfo *cur; | |
208 | int error = 0; | |
209 | struct rb_addrinfo ai; | |
210 | struct rb_addrinfo ai0; | |
211 | struct rb_addrinfo *pai; | |
212 | const struct explore *ex; | |
213 | ||
214 | memset(&sentinel, 0, sizeof(sentinel)); | |
215 | cur = &sentinel; | |
216 | pai = &ai; | |
217 | pai->ai_flags = 0; | |
218 | pai->ai_family = PF_UNSPEC; | |
219 | pai->ai_socktype = ANY; | |
220 | pai->ai_protocol = ANY; | |
221 | pai->ai_addrlen = 0; | |
222 | pai->ai_canonname = NULL; | |
223 | pai->ai_addr = NULL; | |
224 | pai->ai_next = NULL; | |
225 | ||
226 | if (hostname == NULL && servname == NULL) | |
227 | return EAI_NONAME; | |
228 | if (hints) { | |
229 | /* error check for hints */ | |
230 | if (hints->ai_addrlen || hints->ai_canonname || | |
231 | hints->ai_addr || hints->ai_next) | |
232 | ERR(EAI_BADHINTS); /* xxx */ | |
233 | if (hints->ai_flags & ~AI_MASK) | |
234 | ERR(EAI_BADFLAGS); | |
235 | switch (hints->ai_family) { | |
236 | case PF_UNSPEC: | |
237 | case PF_INET: | |
238 | #ifdef IPV6 | |
239 | case PF_INET6: | |
240 | #endif | |
241 | break; | |
242 | default: | |
243 | ERR(EAI_FAMILY); | |
244 | } | |
245 | memcpy(pai, hints, sizeof(*pai)); | |
246 | ||
247 | /* | |
248 | * if both socktype/protocol are specified, check if they | |
249 | * are meaningful combination. | |
250 | */ | |
251 | if (pai->ai_socktype != ANY && pai->ai_protocol != ANY) { | |
252 | for (ex = explore; ex->e_af >= 0; ex++) { | |
253 | if (pai->ai_family != ex->e_af) | |
254 | continue; | |
255 | if (ex->e_socktype == ANY) | |
256 | continue; | |
257 | if (ex->e_protocol == ANY) | |
258 | continue; | |
259 | if (pai->ai_socktype == ex->e_socktype && | |
260 | pai->ai_protocol != ex->e_protocol) { | |
261 | ERR(EAI_BADHINTS); | |
262 | } | |
263 | } | |
264 | } | |
265 | } | |
266 | ||
267 | /* | |
268 | * check for special cases. (1) numeric servname is disallowed if | |
269 | * socktype/protocol are left unspecified. (2) servname is disallowed | |
270 | * for raw and other inet{,6} sockets. | |
271 | */ | |
272 | if (MATCH_FAMILY(pai->ai_family, PF_INET, 1) | |
273 | #ifdef IPV6 | |
274 | || MATCH_FAMILY(pai->ai_family, PF_INET6, 1) | |
275 | #endif | |
276 | ) { | |
277 | ai0 = *pai; /* backup *pai */ | |
278 | ||
279 | if (pai->ai_family == PF_UNSPEC) { | |
280 | #ifdef IPV6 | |
281 | pai->ai_family = PF_INET6; | |
282 | #else | |
283 | pai->ai_family = PF_INET; | |
284 | #endif | |
285 | } | |
286 | error = get_portmatch(pai, servname); | |
287 | if (error) | |
288 | ERR(error); | |
289 | ||
290 | *pai = ai0; | |
291 | } | |
292 | ||
293 | ai0 = *pai; | |
294 | ||
295 | /* NULL hostname, or numeric hostname */ | |
296 | for (ex = explore; ex->e_af >= 0; ex++) { | |
297 | *pai = ai0; | |
298 | ||
299 | /* PF_UNSPEC entries are prepared for DNS queries only */ | |
300 | if (ex->e_af == PF_UNSPEC) | |
301 | continue; | |
302 | ||
303 | if (!MATCH_FAMILY(pai->ai_family, ex->e_af, WILD_AF(ex))) | |
304 | continue; | |
305 | if (!MATCH(pai->ai_socktype, ex->e_socktype, WILD_SOCKTYPE(ex))) | |
306 | continue; | |
307 | if (!MATCH(pai->ai_protocol, ex->e_protocol, WILD_PROTOCOL(ex))) | |
308 | continue; | |
309 | ||
310 | if (pai->ai_family == PF_UNSPEC) | |
311 | pai->ai_family = ex->e_af; | |
312 | if (pai->ai_socktype == ANY && ex->e_socktype != ANY) | |
313 | pai->ai_socktype = ex->e_socktype; | |
314 | if (pai->ai_protocol == ANY && ex->e_protocol != ANY) | |
315 | pai->ai_protocol = ex->e_protocol; | |
316 | ||
317 | if (hostname == NULL) | |
318 | error = explore_null(pai, servname, &cur->ai_next); | |
319 | else | |
320 | error = explore_numeric(pai, hostname, servname, &cur->ai_next); | |
321 | ||
322 | if (error) | |
323 | goto free; | |
324 | ||
325 | while (cur && cur->ai_next) | |
326 | cur = cur->ai_next; | |
327 | } | |
328 | ||
329 | /* | |
330 | * XXX | |
331 | * If numreic representation of AF1 can be interpreted as FQDN | |
332 | * representation of AF2, we need to think again about the code below. | |
333 | */ | |
334 | if (sentinel.ai_next) | |
335 | goto good; | |
336 | ||
337 | if (pai->ai_flags & AI_NUMERICHOST) | |
338 | ERR(EAI_NONAME); | |
339 | if (hostname == NULL) | |
340 | ERR(EAI_NODATA); | |
341 | ||
342 | /* XXX */ | |
343 | if (sentinel.ai_next) | |
344 | error = 0; | |
345 | ||
346 | if (error) | |
347 | goto free; | |
348 | if (error == 0) { | |
349 | if (sentinel.ai_next) { | |
350 | good: | |
351 | *res = sentinel.ai_next; | |
352 | return SUCCESS; | |
353 | } else | |
354 | error = EAI_FAIL; | |
355 | } | |
356 | free: | |
357 | bad: | |
358 | if (sentinel.ai_next) | |
359 | rb_freeaddrinfo(sentinel.ai_next); | |
360 | *res = NULL; | |
361 | return error; | |
362 | } | |
363 | ||
364 | /* | |
365 | * hostname == NULL. | |
366 | * passive socket -> anyaddr (0.0.0.0 or ::) | |
367 | * non-passive socket -> localhost (127.0.0.1 or ::1) | |
368 | */ | |
369 | static int | |
370 | explore_null(const struct rb_addrinfo *pai, const char *servname, struct rb_addrinfo **res) | |
371 | { | |
372 | int s; | |
373 | const struct afd *afd; | |
374 | struct rb_addrinfo *cur; | |
375 | struct rb_addrinfo sentinel; | |
376 | int error; | |
377 | ||
378 | *res = NULL; | |
379 | sentinel.ai_next = NULL; | |
380 | cur = &sentinel; | |
381 | ||
382 | /* | |
383 | * filter out AFs that are not supported by the kernel | |
384 | * XXX errno? | |
385 | */ | |
386 | s = socket(pai->ai_family, SOCK_DGRAM, 0); | |
387 | if (s < 0) { | |
388 | #ifdef _WIN32 | |
389 | errno = WSAGetLastError(); | |
390 | #endif | |
391 | if (errno != EMFILE) | |
392 | return 0; | |
393 | } else | |
394 | #ifdef _WIN32 | |
395 | closesocket(s); | |
396 | #else | |
397 | close(s); | |
398 | #endif | |
399 | ||
400 | /* | |
401 | * if the servname does not match socktype/protocol, ignore it. | |
402 | */ | |
403 | if (get_portmatch(pai, servname) != 0) | |
404 | return 0; | |
405 | ||
406 | afd = find_afd(pai->ai_family); | |
407 | if (afd == NULL) | |
408 | return 0; | |
409 | ||
410 | if (pai->ai_flags & AI_PASSIVE) { | |
411 | GET_AI(cur->ai_next, afd, afd->a_addrany); | |
412 | GET_PORT(cur->ai_next, servname); | |
413 | } else { | |
414 | GET_AI(cur->ai_next, afd, afd->a_loopback); | |
415 | GET_PORT(cur->ai_next, servname); | |
416 | } | |
417 | cur = cur->ai_next; | |
418 | ||
419 | *res = sentinel.ai_next; | |
420 | return 0; | |
421 | ||
422 | free: | |
423 | if (sentinel.ai_next) | |
424 | rb_freeaddrinfo(sentinel.ai_next); | |
425 | return error; | |
426 | } | |
427 | ||
428 | /* | |
429 | * numeric hostname | |
430 | */ | |
431 | static int | |
432 | explore_numeric(const struct rb_addrinfo *pai, const char *hostname, | |
433 | const char *servname, struct rb_addrinfo **res) | |
434 | { | |
435 | const struct afd *afd; | |
436 | struct rb_addrinfo *cur; | |
437 | struct rb_addrinfo sentinel; | |
438 | int error; | |
439 | char pton[PTON_MAX]; | |
440 | ||
441 | *res = NULL; | |
442 | sentinel.ai_next = NULL; | |
443 | cur = &sentinel; | |
444 | ||
445 | /* | |
446 | * if the servname does not match socktype/protocol, ignore it. | |
447 | */ | |
448 | if (get_portmatch(pai, servname) != 0) | |
449 | return 0; | |
450 | ||
451 | afd = find_afd(pai->ai_family); | |
452 | if (afd == NULL) | |
453 | return 0; | |
454 | ||
455 | switch (afd->a_af) { | |
456 | #if 0 /*X/Open spec*/ | |
457 | case AF_INET: | |
458 | if (rb_inet_pton | |
459 | if (inet_aton(hostname, (struct in_addr *)pton) == 1) { | |
460 | if (pai->ai_family == afd->a_af || | |
461 | pai->ai_family == PF_UNSPEC /*?*/) { | |
462 | GET_AI(cur->ai_next, afd, pton); | |
463 | GET_PORT(cur->ai_next, servname); | |
464 | while (cur && cur->ai_next) | |
465 | cur = cur->ai_next; | |
466 | } else | |
467 | ERR(EAI_FAMILY); /*xxx*/ | |
468 | } | |
469 | break; | |
470 | #endif | |
471 | default: | |
472 | if (rb_inet_pton(afd->a_af, hostname, pton) == 1) { | |
473 | if (pai->ai_family == afd->a_af || | |
474 | pai->ai_family == PF_UNSPEC /*?*/) { | |
475 | GET_AI(cur->ai_next, afd, pton); | |
476 | GET_PORT(cur->ai_next, servname); | |
477 | while (cur && cur->ai_next) | |
478 | cur = cur->ai_next; | |
479 | } else | |
480 | ERR(EAI_FAMILY); /* XXX */ | |
481 | } | |
482 | break; | |
483 | } | |
484 | ||
485 | *res = sentinel.ai_next; | |
486 | return 0; | |
487 | ||
488 | free: | |
489 | bad: | |
490 | if (sentinel.ai_next) | |
491 | rb_freeaddrinfo(sentinel.ai_next); | |
492 | return error; | |
493 | } | |
494 | ||
495 | static struct rb_addrinfo * | |
496 | get_ai(const struct rb_addrinfo *pai, const struct afd *afd, const char *addr) | |
497 | { | |
498 | char *p; | |
499 | struct rb_addrinfo *ai; | |
500 | ||
501 | ai = (struct rb_addrinfo *)rb_malloc(sizeof(struct rb_addrinfo) | |
502 | + (afd->a_socklen)); | |
503 | if (ai == NULL) | |
504 | return NULL; | |
505 | ||
506 | memcpy(ai, pai, sizeof(struct rb_addrinfo)); | |
507 | ai->ai_addr = (struct sockaddr *)(void *)(ai + 1); | |
508 | memset(ai->ai_addr, 0, (size_t)afd->a_socklen); | |
509 | ai->ai_addrlen = afd->a_socklen; | |
510 | ai->ai_addr->sa_family = ai->ai_family = afd->a_af; | |
511 | p = (char *)(void *)(ai->ai_addr); | |
512 | memcpy(p + afd->a_off, addr, (size_t)afd->a_addrlen); | |
513 | return ai; | |
514 | } | |
515 | ||
516 | static int | |
517 | get_portmatch(const struct rb_addrinfo *ai, const char *servname) | |
518 | { | |
519 | struct rb_addrinfo xai; | |
520 | memcpy(&xai, ai, sizeof(struct rb_addrinfo)); | |
521 | return(get_port(&xai, servname, 1)); | |
522 | } | |
523 | ||
524 | static int | |
525 | get_port(struct rb_addrinfo *ai, const char *servname, int matchonly) | |
526 | { | |
527 | const char *proto; | |
528 | struct servent *sp; | |
529 | int port; | |
530 | int allownumeric; | |
531 | ||
532 | if (servname == NULL) | |
533 | return 0; | |
534 | switch (ai->ai_family) { | |
535 | case AF_INET: | |
536 | #ifdef AF_INET6 | |
537 | case AF_INET6: | |
538 | #endif | |
539 | break; | |
540 | default: | |
541 | return 0; | |
542 | } | |
543 | ||
544 | switch (ai->ai_socktype) { | |
545 | case SOCK_RAW: | |
546 | return EAI_SERVICE; | |
547 | case SOCK_DGRAM: | |
548 | case SOCK_STREAM: | |
549 | allownumeric = 1; | |
550 | break; | |
551 | case ANY: | |
552 | allownumeric = 0; | |
553 | break; | |
554 | default: | |
555 | return EAI_SOCKTYPE; | |
556 | } | |
557 | ||
558 | if (str_isnumber(servname)) { | |
559 | if (!allownumeric) | |
560 | return EAI_SERVICE; | |
561 | port = atoi(servname); | |
562 | if (port < 0 || port > 65535) | |
563 | return EAI_SERVICE; | |
564 | port = htons(port); | |
565 | } else { | |
566 | switch (ai->ai_socktype) { | |
567 | case SOCK_DGRAM: | |
568 | proto = "udp"; | |
569 | break; | |
570 | case SOCK_STREAM: | |
571 | proto = "tcp"; | |
572 | break; | |
573 | default: | |
574 | proto = NULL; | |
575 | break; | |
576 | } | |
577 | ||
578 | if ((sp = getservbyname(servname, proto)) == NULL) | |
579 | return EAI_SERVICE; | |
580 | port = sp->s_port; | |
581 | } | |
582 | ||
583 | if (!matchonly) { | |
584 | switch (ai->ai_family) { | |
585 | case AF_INET: | |
586 | ((struct sockaddr_in *)(void *) | |
587 | ai->ai_addr)->sin_port = port; | |
588 | break; | |
589 | #ifdef IPV6 | |
590 | case AF_INET6: | |
591 | ((struct sockaddr_in6 *)(void *) | |
592 | ai->ai_addr)->sin6_port = port; | |
593 | break; | |
594 | #endif | |
595 | } | |
596 | } | |
597 | ||
598 | return 0; | |
599 | } | |
600 | ||
601 | static const struct afd * | |
602 | find_afd(int af) | |
603 | { | |
604 | const struct afd *afd; | |
605 | ||
606 | if (af == PF_UNSPEC) | |
607 | return(NULL); | |
608 | ||
609 | for (afd = afdl; afd->a_af; afd++) | |
610 | { | |
611 | if (afd->a_af == af) | |
612 | return(afd); | |
613 | } | |
614 | ||
615 | return(NULL); | |
616 | } | |
617 | #endif |