aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/posix/getaddrinfo.c
blob: f819bb4c0ca0057a819b9b4772714d17659b7e6b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
/* The Inner Net License, Version 2.00

  The author(s) grant permission for redistribution and use in source and
binary forms, with or without modification, of the software and documentation
provided that the following conditions are met:

0. If you receive a version of the software that is specifically labelled
   as not being for redistribution (check the version message and/or README),
   you are not permitted to redistribute that version of the software in any
   way or form.
1. All terms of the all other applicable copyrights and licenses must be
   followed.
2. Redistributions of source code must retain the authors' copyright
   notice(s), this list of conditions, and the following disclaimer.
3. Redistributions in binary form must reproduce the authors' copyright
   notice(s), this list of conditions, and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
4. All advertising materials mentioning features or use of this software
   must display the following acknowledgement with the name(s) of the
   authors as specified in the copyright notice(s) substituted where
   indicated:

	This product includes software developed by <name(s)>, The Inner
	Net, and other contributors.

5. Neither the name(s) of the author(s) nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY ITS AUTHORS AND CONTRIBUTORS ``AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  If these license terms cause you a real problem, contact the author.  */

/* This software is Copyright 1996 by Craig Metz, All Rights Reserved.  */

/* getaddrinfo() v1.13 */

/* To do what POSIX says, even when it's broken: */
#define BROKEN_LIKE_POSIX 1
#define LOCAL 1
#define INET6 1
#define HOSTTABLE 0
#define RESOLVER 1

#include <sys/types.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/socket.h>
#if LOCAL
#include <stdio.h>
#include <string.h>
#include <sys/utsname.h>
#include <sys/un.h>
#endif /* LOCAL */
#include <netinet/in.h>
#include <netdb.h>
#include <errno.h>
#include <arpa/inet.h>

#ifndef AF_LOCAL
#define AF_LOCAL AF_UNIX
#endif /* AF_LOCAL */
#ifndef PF_LOCAL
#define PF_LOCAL PF_UNIX
#endif /* PF_LOCAL */
#ifndef UNIX_PATH_MAX
#define UNIX_PATH_MAX 108
#endif /* UNIX_PATH_MAX */

#define GAIH_OKIFUNSPEC 0x0100
#define GAIH_EAI        ~(GAIH_OKIFUNSPEC)

#if HOSTTABLE
struct hostent *_hostname2addr_hosts(const char *name, int);
struct hostent *_addr2hostname_hosts(const char *name, int, int);
#endif /* HOSTTABLE */

static struct addrinfo nullreq =
{ 0, PF_UNSPEC, 0, 0, 0, NULL, NULL, NULL };

struct gaih_service {
  char *name;
  int num;
};

struct gaih_servtuple {
  struct gaih_servtuple *next;
  int socktype;
  int protocol;
  int port;
};

static struct gaih_servtuple nullserv = {
  NULL, 0, 0, 0
};

struct gaih_addrtuple {
  struct gaih_addrtuple *next;
  int family;
  char addr[16];
};

struct gaih_typeproto {
  int socktype;
  int protocol;
  char *name;
};

#if LOCAL
static int gaih_local(const char *name, const struct gaih_service *service,
		     const struct addrinfo *req, struct addrinfo **pai)
{
  struct utsname utsname;

  if (name || (req->ai_flags & AI_CANONNAME))
    if (uname(&utsname))
      return -EAI_SYSTEM;
  if (name) {
    if (strcmp(name, "localhost") && strcmp(name, "local") && strcmp(name, "unix") && strcmp(name, utsname.nodename))
      return (GAIH_OKIFUNSPEC | -EAI_NONAME);
  };

  if (!(*pai = malloc(sizeof(struct addrinfo) + sizeof(struct sockaddr_un) + ((req->ai_flags & AI_CANONNAME) ? (strlen(utsname.nodename) + 1): 0))))
    return -EAI_MEMORY;

  (*pai)->ai_next = NULL;
  (*pai)->ai_flags = req->ai_flags;
  (*pai)->ai_family = AF_LOCAL;
  (*pai)->ai_socktype = req->ai_socktype ? req->ai_socktype : SOCK_STREAM;
  (*pai)->ai_protocol = req->ai_protocol;
  (*pai)->ai_addrlen = sizeof(struct sockaddr_un);
  (*pai)->ai_addr = (void *)(*pai) + sizeof(struct addrinfo);
#if SALEN
  ((struct sockaddr_un *)(*pai)->ai_addr)->sun_len = sizeof(struct sockaddr_un);
#endif /* SALEN */
  ((struct sockaddr_un *)(*pai)->ai_addr)->sun_family = AF_LOCAL;
  memset(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path, 0, UNIX_PATH_MAX);
  if (service) {
    char *c;
    if (c = strchr(service->name, '/')) {
      if (strlen(service->name) >= sizeof(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path))
        return (GAIH_OKIFUNSPEC | -EAI_SERVICE);
      strcpy(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path, service->name);
    } else {
      if (strlen(P_tmpdir "/") + 1 + strlen(service->name) >= sizeof(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path))
        return (GAIH_OKIFUNSPEC | -EAI_SERVICE);
      strcpy(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path, P_tmpdir "/");
      strcat(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path, service->name);
    };
  } else {
    if (!tmpnam(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path))
      return -EAI_SYSTEM;
  };
  if (req->ai_flags & AI_CANONNAME)
    strcpy((*pai)->ai_canonname = (char *)(*pai) + sizeof(struct addrinfo) + sizeof(struct sockaddr_un), utsname.nodename);
  else
    (*pai)->ai_canonname = NULL;
  return 0;
};
#endif /* LOCAL */

static struct gaih_typeproto gaih_inet_typeproto[] =
{
  { 0, 0, NULL },
  { SOCK_STREAM, IPPROTO_TCP, (char *) "tcp" },
  { SOCK_DGRAM, IPPROTO_UDP, (char *) "udp" },
  { 0, 0, NULL }
};

static int gaih_inet_serv(char *servicename, struct gaih_typeproto *tp, struct gaih_servtuple **st)
{
  struct servent *s;
  int tmpbuflen = 1024;
  struct servent ts;
  char *tmpbuf = __alloca (tmpbuflen);
  while (__getservbyname_r (servicename, tp->name, &ts, tmpbuf, tmpbuflen, &s))
    {
      if (errno == ERANGE)
	{
	  tmpbuflen *= 2;
	  tmpbuf = __alloca (tmpbuflen);
	}
      else
	{
	  return GAIH_OKIFUNSPEC | -EAI_SERVICE;
	}
    }

  if (!(*st = malloc (sizeof (struct gaih_servtuple))))
    return -EAI_MEMORY;

  (*st)->next = NULL;
  (*st)->socktype = tp->socktype;
  (*st)->protocol = tp->protocol;
  (*st)->port = s->s_port;

  return 0;
}

static int gaih_inet(const char *name, const struct gaih_service *service,
		     const struct addrinfo *req, struct addrinfo **pai)
{
  struct gaih_typeproto *tp = gaih_inet_typeproto;
  struct gaih_servtuple *st = &nullserv;
  struct gaih_addrtuple *at = NULL;
  int i;

  if (req->ai_protocol || req->ai_socktype) {
    for (tp++; tp->name &&
	  ((req->ai_socktype != tp->socktype) || !req->ai_socktype) &&
	  ((req->ai_protocol != tp->protocol) || !req->ai_protocol); tp++);
    if (!tp->name)
      if (req->ai_socktype)
	return (GAIH_OKIFUNSPEC | -EAI_SOCKTYPE);
      else
	return (GAIH_OKIFUNSPEC | -EAI_SERVICE);
  }

  if (service) {
    if (service->num < 0) {
      if (tp->name) {
	if (i = gaih_inet_serv(service->name, tp, &st))
	  return i;
      } else {
	struct gaih_servtuple **pst = &st;
	for (tp++; tp->name; tp++) {
	  if (i = gaih_inet_serv(service->name, tp, pst)) {
	    if (i & GAIH_OKIFUNSPEC)
	      continue;
	    goto ret;
	  }
	  pst = &((*pst)->next);
	}
	if (st == &nullserv) {
	  i = (GAIH_OKIFUNSPEC | -EAI_SERVICE);
	  goto ret;
	}
      }
    } else {
      if (!(st = malloc(sizeof(struct gaih_servtuple))))
	return -EAI_MEMORY;

      st->next = NULL;
      st->socktype = tp->socktype;
      st->protocol = tp->protocol;
      st->port = htons(service->num);
    }
  }

  if (name) {
    if (!(at = malloc(sizeof(struct gaih_addrtuple)))) {
      i = -EAI_MEMORY;
      goto ret;
    }

    at->family = 0;
    at->next = NULL;

    if (!at->family || !req->ai_family || (req->ai_family == AF_INET))
      if (inet_pton(AF_INET, name, at->addr) > 0)
	at->family = AF_INET;

#if INET6
    if (!at->family && (!req->ai_family || (req->ai_family == AF_INET6)))
      if (inet_pton(AF_INET6, name, at->addr) > 0)
	at->family = AF_INET6;
#endif /* INET6 */

#if HOSTTABLE
    if (!at->family) {
      struct hostent *h;
      struct gaih_addrtuple **pat = &at;

#if INET6
      if (!req->ai_family || (req->ai_family == AF_INET6))
	if (h = _hostname2addr_hosts(name, AF_INET6)) {
	  for (i = 0; h->h_addr_list[i]; i++) {
	    if (!*pat) {
	      if (!(*pat = malloc(sizeof(struct gaih_addrtuple)))) {
		i = -EAI_MEMORY;
		goto ret;
	      }
	    }
	    (*pat)->next = NULL;
	    (*pat)->family = AF_INET6;
	    memcpy((*pat)->addr, h->h_addr_list[i], sizeof(struct in6_addr));
	    pat = &((*pat)->next);
	  }
	}
#endif /* INET6 */

      if (!req->ai_family || (req->ai_family == AF_INET))
	if (h = _hostname2addr_hosts(name, AF_INET)) {
	  for (i = 0; h->h_addr_list[i]; i++) {
	    if (!*pat) {
	      if (!(*pat = malloc(sizeof(struct gaih_addrtuple)))) {
		i = -EAI_MEMORY;
		goto ret;
	      }
	    }
	    (*pat)->next = NULL;
	    (*pat)->family = AF_INET;
	    memcpy((*pat)->addr, h->h_addr_list[i], sizeof(struct in_addr));
	    pat = &((*pat)->next);
	  }
	}
    }
#endif /* HOSTTABLE */

#if RESOLVER
    if (!at->family) {
      struct hostent *h;
      struct gaih_addrtuple **pat = &at;

#if INET6
      if (!req->ai_family || (req->ai_family == AF_INET6)) {
	int herrno;
	int tmpbuflen = 1024;
	struct hostent th;
	char *tmpbuf = __alloca(tmpbuflen);
	while (__gethostbyname2_r(name, AF_INET6, &th, tmpbuf, tmpbuflen,
				  &h, &herrno)) {
	  if (herrno == NETDB_INTERNAL) {
	    if (errno == ERANGE) {
	      /* Need more buffer */
	      tmpbuflen *= 2;
	      tmpbuf = __alloca(tmpbuflen);
	    } else {
	      /* Bail out */
	      __set_h_errno(herrno);
	      i = -EAI_SYSTEM;
	      goto ret;
	    }
	  } else {
	    break;
	  }
	}
	if (h) {
	  for (i = 0; h->h_addr_list[i]; i++) {
	    if (!*pat) {
	      if (!(*pat = malloc(sizeof(struct gaih_addrtuple)))) {
		i = -EAI_MEMORY;
		goto ret;
	      }
	    }
	    (*pat)->next = NULL;
	    (*pat)->family = AF_INET6;
	    memcpy((*pat)->addr, h->h_addr_list[i], sizeof(struct in6_addr));
	    pat = &((*pat)->next);
	  }
	}
      }
#endif /* INET6 */

      if (!req->ai_family || (req->ai_family == AF_INET)) {
	int herrno;
	struct hostent th;
	int tmpbuflen = 1024;
	char *tmpbuf = __alloca(tmpbuflen);
	while (__gethostbyname2_r(name, AF_INET, &th, tmpbuf, tmpbuflen,
				&h, &herrno)) {
	  if (herrno == NETDB_INTERNAL) {
	    if (errno == ERANGE) {
	      /* Need more buffer */
	      tmpbuflen *= 2;
	      tmpbuf = __alloca(tmpbuflen);
	    } else {
	      /* Bail out */
	      __set_h_errno(herrno);
	      i = -EAI_SYSTEM;
	      goto ret;
	    }
	  } else {
	    break;
	  }
	}
	if (h) {
	  for (i = 0; h->h_addr_list[i]; i++) {
	    if (!*pat) {
	      if (!(*pat = malloc(sizeof(struct gaih_addrtuple)))) {
		i = -EAI_MEMORY;
		goto ret;
	      }
	    }
	    (*pat)->next = NULL;
	    (*pat)->family = AF_INET;
	    memcpy((*pat)->addr, h->h_addr_list[i], sizeof(struct in_addr));
	    pat = &((*pat)->next);
	  }
	}
      }
    }
#endif /* RESOLVER */

    if (!at->family)
      return (GAIH_OKIFUNSPEC | -EAI_NONAME);
  } else {
    if (!(at = malloc(sizeof(struct gaih_addrtuple)))) {
      i = -EAI_MEMORY;
      goto ret;
    };

    memset(at, 0, sizeof(struct gaih_addrtuple));

#if INET6
    if (!(at->next = malloc(sizeof(struct gaih_addrtuple)))) {
      i = -EAI_MEMORY;
      goto ret;
    };

    at->family = AF_INET6;

    memset(at->next, 0, sizeof(struct gaih_addrtuple));
    at->next->family = AF_INET;
#else /* INET6 */
    at->family = AF_INET;
#endif /* INET6 */
  };

  if (!pai) {
    i = 0;
    goto ret;
  };

  {
    const char *c = NULL;
    struct gaih_servtuple *st2;
    struct gaih_addrtuple *at2 = at;
    int j;
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 128
#endif /* MAXHOSTNAMELEN */
    char buffer[MAXHOSTNAMELEN];

    while(at2) {
      if (req->ai_flags & AI_CANONNAME) {
        struct hostent *h = NULL;

#if RESOLVER
        int herrno;
	struct hostent th;
	int tmpbuflen = 1024;
	char *tmpbuf = __alloca(tmpbuflen);
	while (__gethostbyaddr_r(at2->addr,
#if INET6
	    (at2->family == AF_INET6) ? sizeof(struct in6_addr) :
#endif /* INET6 */
				 sizeof(struct in_addr), at2->family,
				 &th, tmpbuf, tmpbuflen, &h, &herrno)) {
	  if (herrno == NETDB_INTERNAL) {
	    if (errno == ERANGE) {
	      /* Need more buffer */
	      tmpbuflen *= 2;
	      tmpbuf = __alloca(tmpbuflen);
	    } else {
	      /* Bail out */
	      __set_h_errno(herrno);
	      i = -EAI_SYSTEM;
	      goto ret;
	    }
	  } else {
	    break;
	  }
	}
#endif /* RESOLVER */
#if HOSTTABLE
	if (!h)
	  h = _addr2hostname_hosts(at2->addr,
#if INET6
	    (at2->family == AF_INET6) ? sizeof(struct in6_addr) :
#endif /* INET6 */
	    sizeof(struct in_addr), at2->family);
#endif /* HOSTTABLE */

	if (!h)
          c = inet_ntop(at2->family, at2->addr, buffer, sizeof(buffer));
	else
          c = h->h_name;

	if (!c) {
	  i = (GAIH_OKIFUNSPEC | -EAI_NONAME);
	  goto ret;
	}

	j = strlen(c) + 1;
      } else
	j = 0;

#if INET6
      if (at2->family == AF_INET6)
	i = sizeof(struct sockaddr_in6);
      else
#endif /* INET6 */
	i = sizeof(struct sockaddr_in);

      st2 = st;
      while(st2) {
	if (!(*pai = malloc(sizeof(struct addrinfo) + i + j))) {
	  i = -EAI_MEMORY;
	  goto ret;
	}
	(*pai)->ai_flags = req->ai_flags;
	(*pai)->ai_family = at2->family;
	(*pai)->ai_socktype = st2->socktype;
	(*pai)->ai_protocol = st2->protocol;
	(*pai)->ai_addrlen = i;
	(*pai)->ai_addr = (void *)(*pai) + sizeof(struct addrinfo);
#if SALEN
	((struct sockaddr_in *)(*pai)->ai_addr)->sin_len = i;
#endif /* SALEN */
	((struct sockaddr_in *)(*pai)->ai_addr)->sin_family = at2->family;
	((struct sockaddr_in *)(*pai)->ai_addr)->sin_port = st2->port;

#if INET6
	if (at2->family == AF_INET6) {
	  ((struct sockaddr_in6 *)(*pai)->ai_addr)->sin6_flowinfo = 0;
	  memcpy(&((struct sockaddr_in6 *)(*pai)->ai_addr)->sin6_addr, at2->addr, sizeof(struct in6_addr));
	} else
#endif /* INET6 */
	{
	  memcpy(&((struct sockaddr_in *)(*pai)->ai_addr)->sin_addr, at2->addr, sizeof(struct in_addr));
	  memset(((struct sockaddr_in *)(*pai)->ai_addr)->sin_zero, 0, sizeof(((struct sockaddr_in *)(*pai)->ai_addr)->sin_zero));
	}

	if (c) {
	  (*pai)->ai_canonname = (void *)(*pai) + sizeof(struct addrinfo) + i;
	  strcpy((*pai)->ai_canonname, c);
	} else
	  (*pai)->ai_canonname = NULL;
	(*pai)->ai_next = NULL;

	pai = &((*pai)->ai_next);

	st2 = st2->next;
      }
      at2 = at2->next;
    }
  }

  i = 0;

ret:
  if (st != &nullserv) {
    struct gaih_servtuple *st2 = st;
    while(st) {
      st2 = st->next;
      free(st);
      st = st2;
    }
  }
  if (at) {
    struct gaih_addrtuple *at2 = at;
    while(at) {
      at2 = at->next;
      free(at);
      at = at2;
    }
  }
  return i;
}

struct gaih {
  int family;
  int (*gaih)(const char *name, const struct gaih_service *service,
	      const struct addrinfo *req, struct addrinfo **pai);
};

static struct gaih gaih[] = {
#if INET6
  { PF_INET6, gaih_inet },
#endif /* INET6 */
  { PF_INET, gaih_inet },
#if LOCAL
  { PF_LOCAL, gaih_local },
#endif /* LOCAL */
  { PF_UNSPEC, NULL }
};

int getaddrinfo(const char *name, const char *service,
		const struct addrinfo *req, struct addrinfo **pai)
{
  int i = 0, j = 0;
  struct addrinfo *p = NULL, **end;
  struct gaih *g = gaih, *pg = NULL;
  struct gaih_service gaih_service, *pservice;

  if (name && (name[0] == '*') && !name[1])
    name = NULL;

  if (service && (service[0] == '*') && !service[1])
    service = NULL;

#if BROKEN_LIKE_POSIX
  if (!name && !service)
    return EAI_NONAME;
#endif /* BROKEN_LIKE_POSIX */

  if (!req)
    req = &nullreq;

  if (req->ai_flags & ~3)
    return EAI_BADFLAGS;

  if ((req->ai_flags & AI_CANONNAME) && !name)
    return EAI_BADFLAGS;

  if (service && *service) {
    char *c;
    gaih_service.num = strtoul(gaih_service.name = (void *)service, &c, 10);
    if (*c) {
      gaih_service.num = -1;
    }
#if BROKEN_LIKE_POSIX
      else
        if (!req->ai_socktype)
          return EAI_SERVICE;
#endif /* BROKEN_LIKE_POSIX */
    pservice = &gaih_service;
  } else
    pservice = NULL;

  if (pai)
    end = &p;
  else
    end = NULL;

  while(g->gaih) {
    if ((req->ai_family == g->family) || !req->ai_family) {
      j++;
      if (!((pg && (pg->gaih == g->gaih)))) {
	pg = g;
	if (i = g->gaih(name, pservice, req, end)) {
	  if (!req->ai_family && (i & GAIH_OKIFUNSPEC))
	    continue;
	  goto gaih_err;
	}
	if (end)
          while(*end) end = &((*end)->ai_next);
      }
    }
    g++;
  }

  if (!j)
    return EAI_FAMILY;

  if (p) {
    *pai = p;
    return 0;
  }

  if (!pai && !i)
    return 0;

gaih_err:
  if (p)
    freeaddrinfo(p);

  if (i)
    return -(i & GAIH_EAI);

  return EAI_NONAME;
}

void freeaddrinfo(struct addrinfo *ai)
{
  struct addrinfo *p;

  while(ai) {
    p = ai;
    ai = ai->ai_next;
    free((void *)p);
  }
}