blob: 5aaa6e7c8144f7dc5c06f2292d44ffcecbcf5ee5 [file] [log] [blame]
Martin v. Löwis01dfdb32001-06-23 16:30:13 +00001/*
2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
3 * All rights reserved.
Antoine Pitrouf95a1b32010-05-09 15:52:27 +00004 *
Martin v. Löwis01dfdb32001-06-23 16:30:13 +00005 * 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.
Antoine Pitrouf95a1b32010-05-09 15:52:27 +000016 *
Martin v. Löwis01dfdb32001-06-23 16:30:13 +000017 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
Ned Deilyadbf8ce2016-03-07 14:51:59 -050018 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
Martin v. Löwis01dfdb32001-06-23 16:30:13 +000019 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
Ned Deilyadbf8ce2016-03-07 14:51:59 -050021 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
Martin v. Löwis01dfdb32001-06-23 16:30:13 +000022 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
Ned Deilyadbf8ce2016-03-07 14:51:59 -050024 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
Martin v. Löwis01dfdb32001-06-23 16:30:13 +000026 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30/*
31 * "#ifdef FAITH" part is local hack for supporting IPv4-v6 translator.
32 *
33 * Issues to be discussed:
34 * - Thread safe-ness must be checked.
35 * - Return values. There are nonstandard return values defined and used
36 * in the source code. This is because RFC2133 is silent about which error
37 * code must be returned for which situation.
38 * - PF_UNSPEC case would be handled in getipnodebyname() with the AI_ALL flag.
39 */
40
41#if 0
42#include <sys/types.h>
43#include <sys/param.h>
44#include <sys/sysctl.h>
45#include <sys/socket.h>
46#include <netinet/in.h>
47#include <arpa/inet.h>
48#include <arpa/nameser.h>
49#include <netdb.h>
50#include <resolv.h>
51#include <string.h>
52#include <stdlib.h>
53#include <stddef.h>
54#include <ctype.h>
55#include <unistd.h>
56
57#include "addrinfo.h"
58#endif
59
Martin v. Löwis44ddbde2001-12-02 10:15:37 +000060#if defined(__KAME__) && defined(ENABLE_IPV6)
Martin v. Löwis01dfdb32001-06-23 16:30:13 +000061# define FAITH
62#endif
63
64#define SUCCESS 0
65#define GAI_ANY 0
66#define YES 1
67#define NO 0
68
69#ifdef FAITH
70static int translate = NO;
71static struct in6_addr faith_prefix = IN6ADDR_GAI_ANY_INIT;
72#endif
73
74static const char in_addrany[] = { 0, 0, 0, 0 };
75static const char in6_addrany[] = {
Antoine Pitrouf95a1b32010-05-09 15:52:27 +000076 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
Martin v. Löwis01dfdb32001-06-23 16:30:13 +000077};
Antoine Pitrouf95a1b32010-05-09 15:52:27 +000078static const char in_loopback[] = { 127, 0, 0, 1 };
Martin v. Löwis01dfdb32001-06-23 16:30:13 +000079static const char in6_loopback[] = {
Antoine Pitrouf95a1b32010-05-09 15:52:27 +000080 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
Martin v. Löwis01dfdb32001-06-23 16:30:13 +000081};
82
83struct sockinet {
Antoine Pitrouf95a1b32010-05-09 15:52:27 +000084 u_char si_len;
85 u_char si_family;
86 u_short si_port;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +000087};
88
89static struct gai_afd {
Antoine Pitrouf95a1b32010-05-09 15:52:27 +000090 int a_af;
91 int a_addrlen;
92 int a_socklen;
93 int a_off;
94 const char *a_addrany;
95 const char *a_loopback;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +000096} gai_afdl [] = {
Martin v. Löwis44ddbde2001-12-02 10:15:37 +000097#ifdef ENABLE_IPV6
Martin v. Löwis01dfdb32001-06-23 16:30:13 +000098#define N_INET6 0
Antoine Pitrouf95a1b32010-05-09 15:52:27 +000099 {PF_INET6, sizeof(struct in6_addr),
100 sizeof(struct sockaddr_in6),
101 offsetof(struct sockaddr_in6, sin6_addr),
102 in6_addrany, in6_loopback},
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000103#define N_INET 1
104#else
105#define N_INET 0
106#endif
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000107 {PF_INET, sizeof(struct in_addr),
108 sizeof(struct sockaddr_in),
109 offsetof(struct sockaddr_in, sin_addr),
110 in_addrany, in_loopback},
111 {0, 0, 0, 0, NULL, NULL},
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000112};
113
Martin v. Löwis44ddbde2001-12-02 10:15:37 +0000114#ifdef ENABLE_IPV6
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000115#define PTON_MAX 16
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000116#else
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000117#define PTON_MAX 4
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000118#endif
119
Martin v. Löwisd7830412001-07-19 17:37:46 +0000120#ifndef IN_MULTICAST
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000121#define IN_MULTICAST(i) (((i) & 0xf0000000U) == 0xe0000000U)
Martin v. Löwisd7830412001-07-19 17:37:46 +0000122#endif
123
124#ifndef IN_EXPERIMENTAL
125#define IN_EXPERIMENTAL(i) (((i) & 0xe0000000U) == 0xe0000000U)
126#endif
127
128#ifndef IN_LOOPBACKNET
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000129#define IN_LOOPBACKNET 127
Martin v. Löwisd7830412001-07-19 17:37:46 +0000130#endif
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000131
Neal Norwitze0387ec2007-02-27 19:06:23 +0000132static int get_name(const char *, struct gai_afd *,
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000133 struct addrinfo **, char *, struct addrinfo *,
134 int);
Neal Norwitze0387ec2007-02-27 19:06:23 +0000135static int get_addr(const char *, int, struct addrinfo **,
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000136 struct addrinfo *, int);
Neal Norwitze0387ec2007-02-27 19:06:23 +0000137static int str_isnumber(const char *);
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000138
Serhiy Storchaka2d06e842015-12-25 19:53:18 +0200139static const char * const ai_errlist[] = {
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000140 "success.",
141 "address family for hostname not supported.", /* EAI_ADDRFAMILY */
142 "temporary failure in name resolution.", /* EAI_AGAIN */
143 "invalid value for ai_flags.", /* EAI_BADFLAGS */
144 "non-recoverable failure in name resolution.", /* EAI_FAIL */
145 "ai_family not supported.", /* EAI_FAMILY */
146 "memory allocation failure.", /* EAI_MEMORY */
147 "no address associated with hostname.", /* EAI_NODATA */
148 "hostname nor servname provided, or not known.",/* EAI_NONAME */
149 "servname not supported for ai_socktype.", /* EAI_SERVICE */
150 "ai_socktype not supported.", /* EAI_SOCKTYPE */
151 "system error returned in errno.", /* EAI_SYSTEM */
152 "invalid value for hints.", /* EAI_BADHINTS */
153 "resolved protocol is unknown.", /* EAI_PROTOCOL */
154 "unknown error.", /* EAI_MAX */
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000155};
156
157#define GET_CANONNAME(ai, str) \
158if (pai->ai_flags & AI_CANONNAME) {\
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000159 if (((ai)->ai_canonname = (char *)malloc(strlen(str) + 1)) != NULL) {\
160 strcpy((ai)->ai_canonname, (str));\
161 } else {\
162 error = EAI_MEMORY;\
163 goto free;\
164 }\
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000165}
166
167#ifdef HAVE_SOCKADDR_SA_LEN
168#define GET_AI(ai, gai_afd, addr, port) {\
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000169 char *p;\
170 if (((ai) = (struct addrinfo *)malloc(sizeof(struct addrinfo) +\
171 ((gai_afd)->a_socklen)))\
172 == NULL) goto free;\
173 memcpy(ai, pai, sizeof(struct addrinfo));\
174 (ai)->ai_addr = (struct sockaddr *)((ai) + 1);\
175 memset((ai)->ai_addr, 0, (gai_afd)->a_socklen);\
176 (ai)->ai_addr->sa_len = (ai)->ai_addrlen = (gai_afd)->a_socklen;\
177 (ai)->ai_addr->sa_family = (ai)->ai_family = (gai_afd)->a_af;\
178 ((struct sockinet *)(ai)->ai_addr)->si_port = port;\
179 p = (char *)((ai)->ai_addr);\
180 memcpy(p + (gai_afd)->a_off, (addr), (gai_afd)->a_addrlen);\
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000181}
182#else
183#define GET_AI(ai, gai_afd, addr, port) {\
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000184 char *p;\
185 if (((ai) = (struct addrinfo *)malloc(sizeof(struct addrinfo) +\
186 ((gai_afd)->a_socklen)))\
187 == NULL) goto free;\
188 memcpy(ai, pai, sizeof(struct addrinfo));\
189 (ai)->ai_addr = (struct sockaddr *)((ai) + 1);\
190 memset((ai)->ai_addr, 0, (gai_afd)->a_socklen);\
191 (ai)->ai_addrlen = (gai_afd)->a_socklen;\
192 (ai)->ai_addr->sa_family = (ai)->ai_family = (gai_afd)->a_af;\
193 ((struct sockinet *)(ai)->ai_addr)->si_port = port;\
194 p = (char *)((ai)->ai_addr);\
195 memcpy(p + (gai_afd)->a_off, (addr), (gai_afd)->a_addrlen);\
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000196}
197#endif
198
199#define ERR(err) { error = (err); goto bad; }
200
Serhiy Storchakaef1585e2015-12-25 20:01:53 +0200201const char *
Guido van Rossum23351002002-07-17 14:33:34 +0000202gai_strerror(int ecode)
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000203{
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000204 if (ecode < 0 || ecode > EAI_MAX)
205 ecode = EAI_MAX;
206 return ai_errlist[ecode];
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000207}
208
209void
Guido van Rossum23351002002-07-17 14:33:34 +0000210freeaddrinfo(struct addrinfo *ai)
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000211{
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000212 struct addrinfo *next;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000213
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000214 do {
215 next = ai->ai_next;
216 if (ai->ai_canonname)
217 free(ai->ai_canonname);
218 /* no need to free(ai->ai_addr) */
219 free(ai);
220 } while ((ai = next) != NULL);
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000221}
222
223static int
Guido van Rossum23351002002-07-17 14:33:34 +0000224str_isnumber(const char *p)
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000225{
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000226 unsigned char *q = (unsigned char *)p;
227 while (*q) {
228 if (! isdigit(*q))
229 return NO;
230 q++;
231 }
232 return YES;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000233}
234
235int
Martin v. Löwis39e0c5d2001-09-07 16:10:00 +0000236getaddrinfo(const char*hostname, const char*servname,
237 const struct addrinfo *hints, struct addrinfo **res)
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000238{
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000239 struct addrinfo sentinel;
240 struct addrinfo *top = NULL;
241 struct addrinfo *cur;
242 int i, error = 0;
243 char pton[PTON_MAX];
244 struct addrinfo ai;
245 struct addrinfo *pai;
246 u_short port;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000247
248#ifdef FAITH
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000249 static int firsttime = 1;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000250
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000251 if (firsttime) {
252 /* translator hack */
253 {
Serhiy Storchaka4ae06c52017-12-12 13:55:04 +0200254 const char *q = getenv("GAI");
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000255 if (q && inet_pton(AF_INET6, q, &faith_prefix) == 1)
256 translate = YES;
257 }
258 firsttime = 0;
259 }
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000260#endif
261
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000262 /* initialize file static vars */
263 sentinel.ai_next = NULL;
264 cur = &sentinel;
265 pai = &ai;
266 pai->ai_flags = 0;
267 pai->ai_family = PF_UNSPEC;
268 pai->ai_socktype = GAI_ANY;
269 pai->ai_protocol = GAI_ANY;
270 pai->ai_addrlen = 0;
271 pai->ai_canonname = NULL;
272 pai->ai_addr = NULL;
273 pai->ai_next = NULL;
274 port = GAI_ANY;
275
276 if (hostname == NULL && servname == NULL)
277 return EAI_NONAME;
278 if (hints) {
279 /* error check for hints */
280 if (hints->ai_addrlen || hints->ai_canonname ||
281 hints->ai_addr || hints->ai_next)
282 ERR(EAI_BADHINTS); /* xxx */
283 if (hints->ai_flags & ~AI_MASK)
284 ERR(EAI_BADFLAGS);
285 switch (hints->ai_family) {
286 case PF_UNSPEC:
287 case PF_INET:
Martin v. Löwis44ddbde2001-12-02 10:15:37 +0000288#ifdef ENABLE_IPV6
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000289 case PF_INET6:
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000290#endif
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000291 break;
292 default:
293 ERR(EAI_FAMILY);
294 }
295 memcpy(pai, hints, sizeof(*pai));
296 switch (pai->ai_socktype) {
297 case GAI_ANY:
298 switch (pai->ai_protocol) {
299 case GAI_ANY:
300 break;
301 case IPPROTO_UDP:
302 pai->ai_socktype = SOCK_DGRAM;
303 break;
304 case IPPROTO_TCP:
305 pai->ai_socktype = SOCK_STREAM;
306 break;
307 default:
308 pai->ai_socktype = SOCK_RAW;
309 break;
310 }
311 break;
312 case SOCK_RAW:
313 break;
314 case SOCK_DGRAM:
315 if (pai->ai_protocol != IPPROTO_UDP &&
316 pai->ai_protocol != GAI_ANY)
317 ERR(EAI_BADHINTS); /*xxx*/
318 pai->ai_protocol = IPPROTO_UDP;
319 break;
320 case SOCK_STREAM:
321 if (pai->ai_protocol != IPPROTO_TCP &&
322 pai->ai_protocol != GAI_ANY)
323 ERR(EAI_BADHINTS); /*xxx*/
324 pai->ai_protocol = IPPROTO_TCP;
325 break;
326 default:
327 ERR(EAI_SOCKTYPE);
328 /* unreachable */
329 }
330 }
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000331
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000332 /*
333 * service port
334 */
335 if (servname) {
336 if (str_isnumber(servname)) {
337 if (pai->ai_socktype == GAI_ANY) {
338 /* caller accept *GAI_ANY* socktype */
339 pai->ai_socktype = SOCK_DGRAM;
340 pai->ai_protocol = IPPROTO_UDP;
341 }
342 port = htons((u_short)atoi(servname));
343 } else {
344 struct servent *sp;
Serhiy Storchakae2f92de2017-11-11 13:06:26 +0200345 const char *proto;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000346
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000347 proto = NULL;
348 switch (pai->ai_socktype) {
349 case GAI_ANY:
350 proto = NULL;
351 break;
352 case SOCK_DGRAM:
353 proto = "udp";
354 break;
355 case SOCK_STREAM:
356 proto = "tcp";
357 break;
358 default:
359 fprintf(stderr, "panic!\n");
360 break;
361 }
362 if ((sp = getservbyname(servname, proto)) == NULL)
363 ERR(EAI_SERVICE);
364 port = sp->s_port;
365 if (pai->ai_socktype == GAI_ANY) {
366 if (strcmp(sp->s_proto, "udp") == 0) {
367 pai->ai_socktype = SOCK_DGRAM;
368 pai->ai_protocol = IPPROTO_UDP;
369 } else if (strcmp(sp->s_proto, "tcp") == 0) {
370 pai->ai_socktype = SOCK_STREAM;
371 pai->ai_protocol = IPPROTO_TCP;
372 } else
373 ERR(EAI_PROTOCOL); /*xxx*/
374 }
375 }
376 }
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000377
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000378 /*
379 * hostname == NULL.
380 * passive socket -> anyaddr (0.0.0.0 or ::)
381 * non-passive socket -> localhost (127.0.0.1 or ::1)
382 */
383 if (hostname == NULL) {
384 struct gai_afd *gai_afd;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000385
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000386 for (gai_afd = &gai_afdl[0]; gai_afd->a_af; gai_afd++) {
387 if (!(pai->ai_family == PF_UNSPEC
388 || pai->ai_family == gai_afd->a_af)) {
389 continue;
390 }
391
392 if (pai->ai_flags & AI_PASSIVE) {
393 GET_AI(cur->ai_next, gai_afd, gai_afd->a_addrany, port);
394 /* xxx meaningless?
395 * GET_CANONNAME(cur->ai_next, "anyaddr");
396 */
397 } else {
398 GET_AI(cur->ai_next, gai_afd, gai_afd->a_loopback,
399 port);
400 /* xxx meaningless?
401 * GET_CANONNAME(cur->ai_next, "localhost");
402 */
403 }
404 cur = cur->ai_next;
405 }
406 top = sentinel.ai_next;
407 if (top)
408 goto good;
409 else
410 ERR(EAI_FAMILY);
411 }
412
413 /* hostname as numeric name */
414 for (i = 0; gai_afdl[i].a_af; i++) {
415 if (inet_pton(gai_afdl[i].a_af, hostname, pton)) {
416 u_long v4a;
Martin v. Löwis44ddbde2001-12-02 10:15:37 +0000417#ifdef ENABLE_IPV6
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000418 u_char pfx;
Martin v. Löwisc925b1532001-07-21 09:42:15 +0000419#endif
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000420
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000421 switch (gai_afdl[i].a_af) {
422 case AF_INET:
423 v4a = ((struct in_addr *)pton)->s_addr;
424 v4a = ntohl(v4a);
425 if (IN_MULTICAST(v4a) || IN_EXPERIMENTAL(v4a))
426 pai->ai_flags &= ~AI_CANONNAME;
427 v4a >>= IN_CLASSA_NSHIFT;
428 if (v4a == 0 || v4a == IN_LOOPBACKNET)
429 pai->ai_flags &= ~AI_CANONNAME;
430 break;
Martin v. Löwis44ddbde2001-12-02 10:15:37 +0000431#ifdef ENABLE_IPV6
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000432 case AF_INET6:
Antoine Pitroua9a53c72012-08-02 20:37:12 +0200433 pfx = ((struct in6_addr *)pton)->s6_addr[0];
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000434 if (pfx == 0 || pfx == 0xfe || pfx == 0xff)
435 pai->ai_flags &= ~AI_CANONNAME;
436 break;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000437#endif
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000438 }
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000439
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000440 if (pai->ai_family == gai_afdl[i].a_af ||
441 pai->ai_family == PF_UNSPEC) {
442 if (! (pai->ai_flags & AI_CANONNAME)) {
443 GET_AI(top, &gai_afdl[i], pton, port);
444 goto good;
445 }
446 /*
447 * if AI_CANONNAME and if reverse lookup
448 * fail, return ai anyway to pacify
449 * calling application.
450 *
451 * XXX getaddrinfo() is a name->address
452 * translation function, and it looks strange
453 * that we do addr->name translation here.
454 */
455 get_name(pton, &gai_afdl[i], &top, pton, pai, port);
456 goto good;
457 } else
458 ERR(EAI_FAMILY); /*xxx*/
459 }
460 }
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000461
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000462 if (pai->ai_flags & AI_NUMERICHOST)
463 ERR(EAI_NONAME);
464
465 /* hostname as alphabetical name */
466 error = get_addr(hostname, pai->ai_family, &top, pai, port);
467 if (error == 0) {
468 if (top) {
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000469 good:
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000470 *res = top;
471 return SUCCESS;
472 } else
473 error = EAI_FAIL;
474 }
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000475 free:
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000476 if (top)
477 freeaddrinfo(top);
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000478 bad:
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000479 *res = NULL;
480 return error;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000481}
482
483static int
484get_name(addr, gai_afd, res, numaddr, pai, port0)
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000485 const char *addr;
486 struct gai_afd *gai_afd;
487 struct addrinfo **res;
488 char *numaddr;
489 struct addrinfo *pai;
490 int port0;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000491{
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000492 u_short port = port0 & 0xffff;
493 struct hostent *hp;
494 struct addrinfo *cur;
495 int error = 0;
Martin v. Löwis44ddbde2001-12-02 10:15:37 +0000496#ifdef ENABLE_IPV6
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000497 int h_error;
Martin v. Löwisc925b1532001-07-21 09:42:15 +0000498#endif
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000499
Martin v. Löwis44ddbde2001-12-02 10:15:37 +0000500#ifdef ENABLE_IPV6
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000501 hp = getipnodebyaddr(addr, gai_afd->a_addrlen, gai_afd->a_af, &h_error);
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000502#else
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000503 hp = gethostbyaddr(addr, gai_afd->a_addrlen, AF_INET);
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000504#endif
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000505 if (hp && hp->h_name && hp->h_name[0] && hp->h_addr_list[0]) {
506 GET_AI(cur, gai_afd, hp->h_addr_list[0], port);
507 GET_CANONNAME(cur, hp->h_name);
508 } else
509 GET_AI(cur, gai_afd, numaddr, port);
510
Martin v. Löwis44ddbde2001-12-02 10:15:37 +0000511#ifdef ENABLE_IPV6
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000512 if (hp)
513 freehostent(hp);
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000514#endif
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000515 *res = cur;
516 return SUCCESS;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000517 free:
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000518 if (cur)
519 freeaddrinfo(cur);
Martin v. Löwis44ddbde2001-12-02 10:15:37 +0000520#ifdef ENABLE_IPV6
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000521 if (hp)
522 freehostent(hp);
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000523#endif
524 /* bad: */
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000525 *res = NULL;
526 return error;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000527}
528
529static int
530get_addr(hostname, af, res, pai, port0)
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000531 const char *hostname;
532 int af;
533 struct addrinfo **res;
534 struct addrinfo *pai;
535 int port0;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000536{
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000537 u_short port = port0 & 0xffff;
538 struct addrinfo sentinel;
539 struct hostent *hp;
540 struct addrinfo *top, *cur;
541 struct gai_afd *gai_afd;
542 int i, error = 0, h_error;
543 char *ap;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000544
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000545 top = NULL;
546 sentinel.ai_next = NULL;
547 cur = &sentinel;
Martin v. Löwis44ddbde2001-12-02 10:15:37 +0000548#ifdef ENABLE_IPV6
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000549 if (af == AF_UNSPEC) {
550 hp = getipnodebyname(hostname, AF_INET6,
551 AI_ADDRCONFIG|AI_ALL|AI_V4MAPPED, &h_error);
552 } else
553 hp = getipnodebyname(hostname, af, AI_ADDRCONFIG, &h_error);
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000554#else
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000555 hp = gethostbyname(hostname);
556 h_error = h_errno;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000557#endif
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000558 if (hp == NULL) {
559 switch (h_error) {
560 case HOST_NOT_FOUND:
561 case NO_DATA:
562 error = EAI_NODATA;
563 break;
564 case TRY_AGAIN:
565 error = EAI_AGAIN;
566 break;
567 case NO_RECOVERY:
568 default:
569 error = EAI_FAIL;
570 break;
571 }
572 goto free;
573 }
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000574
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000575 if ((hp->h_name == NULL) || (hp->h_name[0] == 0) ||
576 (hp->h_addr_list[0] == NULL)) {
577 error = EAI_FAIL;
578 goto free;
579 }
580
581 for (i = 0; (ap = hp->h_addr_list[i]) != NULL; i++) {
582 switch (af) {
Martin v. Löwis44ddbde2001-12-02 10:15:37 +0000583#ifdef ENABLE_IPV6
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000584 case AF_INET6:
585 gai_afd = &gai_afdl[N_INET6];
586 break;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000587#endif
Martin v. Löwis44ddbde2001-12-02 10:15:37 +0000588#ifndef ENABLE_IPV6
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000589 default: /* AF_UNSPEC */
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000590#endif
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000591 case AF_INET:
592 gai_afd = &gai_afdl[N_INET];
593 break;
Martin v. Löwis44ddbde2001-12-02 10:15:37 +0000594#ifdef ENABLE_IPV6
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000595 default: /* AF_UNSPEC */
596 if (IN6_IS_ADDR_V4MAPPED((struct in6_addr *)ap)) {
597 ap += sizeof(struct in6_addr) -
598 sizeof(struct in_addr);
599 gai_afd = &gai_afdl[N_INET];
600 } else
601 gai_afd = &gai_afdl[N_INET6];
602 break;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000603#endif
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000604 }
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000605#ifdef FAITH
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000606 if (translate && gai_afd->a_af == AF_INET) {
607 struct in6_addr *in6;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000608
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000609 GET_AI(cur->ai_next, &gai_afdl[N_INET6], ap, port);
610 in6 = &((struct sockaddr_in6 *)cur->ai_next->ai_addr)->sin6_addr;
611 memcpy(&in6->s6_addr32[0], &faith_prefix,
612 sizeof(struct in6_addr) - sizeof(struct in_addr));
613 memcpy(&in6->s6_addr32[3], ap, sizeof(struct in_addr));
614 } else
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000615#endif /* FAITH */
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000616 GET_AI(cur->ai_next, gai_afd, ap, port);
617 if (cur == &sentinel) {
618 top = cur->ai_next;
619 GET_CANONNAME(top, hp->h_name);
620 }
621 cur = cur->ai_next;
622 }
Martin v. Löwis44ddbde2001-12-02 10:15:37 +0000623#ifdef ENABLE_IPV6
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000624 freehostent(hp);
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000625#endif
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000626 *res = top;
627 return SUCCESS;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000628 free:
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000629 if (top)
630 freeaddrinfo(top);
Martin v. Löwis44ddbde2001-12-02 10:15:37 +0000631#ifdef ENABLE_IPV6
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000632 if (hp)
633 freehostent(hp);
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000634#endif
Martin v. Löwisf0b11d22001-11-07 08:31:03 +0000635/* bad: */
Antoine Pitrouf95a1b32010-05-09 15:52:27 +0000636 *res = NULL;
637 return error;
Martin v. Löwis01dfdb32001-06-23 16:30:13 +0000638}