]>
Commit | Line | Data |
---|---|---|
46ec036d UD |
1 | /* The Inner Net License, Version 2.00 |
2 | ||
3 | The author(s) grant permission for redistribution and use in source and | |
4 | binary forms, with or without modification, of the software and documentation | |
5 | provided that the following conditions are met: | |
6 | ||
7 | 0. If you receive a version of the software that is specifically labelled | |
8 | as not being for redistribution (check the version message and/or README), | |
9 | you are not permitted to redistribute that version of the software in any | |
10 | way or form. | |
11 | 1. All terms of the all other applicable copyrights and licenses must be | |
12 | followed. | |
13 | 2. Redistributions of source code must retain the authors' copyright | |
14 | notice(s), this list of conditions, and the following disclaimer. | |
15 | 3. Redistributions in binary form must reproduce the authors' copyright | |
16 | notice(s), this list of conditions, and the following disclaimer in the | |
17 | documentation and/or other materials provided with the distribution. | |
aeb25823 | 18 | 4. [The copyright holder has authorized the removal of this clause.] |
46ec036d UD |
19 | 5. Neither the name(s) of the author(s) nor the names of its contributors |
20 | may be used to endorse or promote products derived from this software | |
21 | without specific prior written permission. | |
22 | ||
23 | THIS SOFTWARE IS PROVIDED BY ITS AUTHORS AND CONTRIBUTORS ``AS IS'' AND ANY | |
24 | EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
25 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
26 | DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY | |
27 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
28 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
29 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
30 | ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
31 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
32 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
33 | ||
34 | If these license terms cause you a real problem, contact the author. */ | |
35 | ||
36 | /* This software is Copyright 1996 by Craig Metz, All Rights Reserved. */ | |
37 | ||
c0bc5f7b UD |
38 | #include <assert.h> |
39 | #include <errno.h> | |
40 | #include <netdb.h> | |
9c42c64d | 41 | #include <resolv.h> |
c0bc5f7b | 42 | #include <stdio.h> |
46ec036d | 43 | #include <stdlib.h> |
c0bc5f7b | 44 | #include <string.h> |
1fb05e3d | 45 | #include <unistd.h> |
c0bc5f7b | 46 | #include <arpa/inet.h> |
1fb05e3d | 47 | #include <sys/socket.h> |
46ec036d | 48 | #include <netinet/in.h> |
c0bc5f7b UD |
49 | #include <sys/types.h> |
50 | #include <sys/un.h> | |
51 | #include <sys/utsname.h> | |
4fcddf8e | 52 | #include <net/if.h> |
1fb05e3d | 53 | |
46ec036d UD |
54 | #define GAIH_OKIFUNSPEC 0x0100 |
55 | #define GAIH_EAI ~(GAIH_OKIFUNSPEC) | |
56 | ||
40a55d20 UD |
57 | #ifndef UNIX_PATH_MAX |
58 | #define UNIX_PATH_MAX 108 | |
59 | #endif | |
46ec036d | 60 | |
40a55d20 UD |
61 | struct gaih_service |
62 | { | |
63 | const char *name; | |
64 | int num; | |
65 | }; | |
46ec036d | 66 | |
40a55d20 UD |
67 | struct gaih_servtuple |
68 | { | |
69 | struct gaih_servtuple *next; | |
70 | int socktype; | |
71 | int protocol; | |
72 | int port; | |
73 | }; | |
46ec036d | 74 | |
3e2d61a3 | 75 | static const struct gaih_servtuple nullserv; |
46ec036d | 76 | |
40a55d20 UD |
77 | struct gaih_addrtuple |
78 | { | |
79 | struct gaih_addrtuple *next; | |
80 | int family; | |
81 | char addr[16]; | |
c0bc5f7b | 82 | uint32_t scopeid; |
40a55d20 | 83 | }; |
46ec036d | 84 | |
40a55d20 UD |
85 | struct gaih_typeproto |
86 | { | |
87 | int socktype; | |
88 | int protocol; | |
3e2d61a3 | 89 | char name[4]; |
f3ac48d0 | 90 | int protoflag; |
40a55d20 | 91 | }; |
46ec036d | 92 | |
f3ac48d0 UD |
93 | /* Values for `protoflag'. */ |
94 | #define GAI_PROTO_NOSERVICE 1 | |
85599e53 | 95 | #define GAI_PROTO_PROTOANY 2 |
f3ac48d0 | 96 | |
3e2d61a3 | 97 | static const struct gaih_typeproto gaih_inet_typeproto[] = |
40a55d20 | 98 | { |
3e2d61a3 UD |
99 | { 0, 0, "", 0 }, |
100 | { SOCK_STREAM, IPPROTO_TCP, "tcp", 0 }, | |
101 | { SOCK_DGRAM, IPPROTO_UDP, "udp", 0 }, | |
102 | { SOCK_RAW, 0, "raw", GAI_PROTO_PROTOANY|GAI_PROTO_NOSERVICE }, | |
103 | { 0, 0, "", 0 } | |
46ec036d UD |
104 | }; |
105 | ||
40a55d20 UD |
106 | struct gaih |
107 | { | |
108 | int family; | |
109 | int (*gaih)(const char *name, const struct gaih_service *service, | |
110 | const struct addrinfo *req, struct addrinfo **pai); | |
111 | }; | |
112 | ||
3e2d61a3 UD |
113 | #if PF_UNSPEC == 0 |
114 | static const struct addrinfo default_hints; | |
115 | #else | |
116 | static const struct addrinfo default_hints = | |
40a55d20 | 117 | { 0, PF_UNSPEC, 0, 0, 0, NULL, NULL, NULL }; |
3e2d61a3 | 118 | #endif |
40a55d20 UD |
119 | |
120 | ||
64b7897d UD |
121 | #if 0 |
122 | /* Using Unix sockets this way is a security risk. */ | |
40a55d20 UD |
123 | static int |
124 | gaih_local (const char *name, const struct gaih_service *service, | |
125 | const struct addrinfo *req, struct addrinfo **pai) | |
1fb05e3d UD |
126 | { |
127 | struct utsname utsname; | |
128 | ||
f1a785ac UD |
129 | if ((name != NULL) && (req->ai_flags & AI_NUMERICHOST)) |
130 | return GAIH_OKIFUNSPEC | -EAI_NONAME; | |
131 | ||
40a55d20 | 132 | if ((name != NULL) || (req->ai_flags & AI_CANONNAME)) |
db7dc811 | 133 | if (uname (&utsname) < 0) |
1fb05e3d | 134 | return -EAI_SYSTEM; |
1fb05e3d | 135 | |
40a55d20 UD |
136 | if (name != NULL) |
137 | { | |
138 | if (strcmp(name, "localhost") && | |
139 | strcmp(name, "local") && | |
140 | strcmp(name, "unix") && | |
141 | strcmp(name, utsname.nodename)) | |
142 | return GAIH_OKIFUNSPEC | -EAI_NONAME; | |
143 | } | |
144 | ||
a0bf6ac7 UD |
145 | if (req->ai_protocol || req->ai_socktype) |
146 | { | |
3e2d61a3 | 147 | const struct gaih_typeproto *tp = gaih_inet_typeproto + 1; |
f3ac48d0 | 148 | |
4b1fef84 | 149 | while (tp->name[0] |
f3ac48d0 | 150 | && ((tp->protoflag & GAI_PROTO_NOSERVICE) != 0 |
3a47453d UD |
151 | || (req->ai_socktype != 0 && req->ai_socktype != tp->socktype) |
152 | || (req->ai_protocol != 0 | |
85599e53 | 153 | && !(tp->protoflag & GAI_PROTO_PROTOANY) |
3a47453d | 154 | && req->ai_protocol != tp->protocol))) |
f3ac48d0 | 155 | ++tp; |
a0bf6ac7 | 156 | |
4b1fef84 | 157 | if (! tp->name[0]) |
a0bf6ac7 UD |
158 | { |
159 | if (req->ai_socktype) | |
160 | return (GAIH_OKIFUNSPEC | -EAI_SOCKTYPE); | |
161 | else | |
162 | return (GAIH_OKIFUNSPEC | -EAI_SERVICE); | |
163 | } | |
164 | } | |
165 | ||
166 | *pai = malloc (sizeof (struct addrinfo) + sizeof (struct sockaddr_un) | |
40a55d20 UD |
167 | + ((req->ai_flags & AI_CANONNAME) |
168 | ? (strlen(utsname.nodename) + 1): 0)); | |
169 | if (*pai == NULL) | |
1fb05e3d UD |
170 | return -EAI_MEMORY; |
171 | ||
172 | (*pai)->ai_next = NULL; | |
173 | (*pai)->ai_flags = req->ai_flags; | |
174 | (*pai)->ai_family = AF_LOCAL; | |
175 | (*pai)->ai_socktype = req->ai_socktype ? req->ai_socktype : SOCK_STREAM; | |
176 | (*pai)->ai_protocol = req->ai_protocol; | |
a0bf6ac7 UD |
177 | (*pai)->ai_addrlen = sizeof (struct sockaddr_un); |
178 | (*pai)->ai_addr = (void *) (*pai) + sizeof (struct addrinfo); | |
40a55d20 | 179 | |
1fb05e3d | 180 | #if SALEN |
40a55d20 UD |
181 | ((struct sockaddr_un *) (*pai)->ai_addr)->sun_len = |
182 | sizeof (struct sockaddr_un); | |
1fb05e3d | 183 | #endif /* SALEN */ |
40a55d20 | 184 | |
1fb05e3d UD |
185 | ((struct sockaddr_un *)(*pai)->ai_addr)->sun_family = AF_LOCAL; |
186 | memset(((struct sockaddr_un *)(*pai)->ai_addr)->sun_path, 0, UNIX_PATH_MAX); | |
40a55d20 UD |
187 | |
188 | if (service) | |
189 | { | |
190 | struct sockaddr_un *sunp = (struct sockaddr_un *) (*pai)->ai_addr; | |
191 | ||
192 | if (strchr (service->name, '/') != NULL) | |
193 | { | |
194 | if (strlen (service->name) >= sizeof (sunp->sun_path)) | |
195 | return GAIH_OKIFUNSPEC | -EAI_SERVICE; | |
196 | ||
197 | strcpy (sunp->sun_path, service->name); | |
198 | } | |
199 | else | |
200 | { | |
201 | if (strlen (P_tmpdir "/") + 1 + strlen (service->name) >= | |
202 | sizeof (sunp->sun_path)) | |
203 | return GAIH_OKIFUNSPEC | -EAI_SERVICE; | |
204 | ||
205 | __stpcpy (__stpcpy (sunp->sun_path, P_tmpdir "/"), service->name); | |
206 | } | |
207 | } | |
208 | else | |
209 | { | |
e658b54e UD |
210 | /* This is a dangerous use of the interface since there is a time |
211 | window between the test for the file and the actual creation | |
212 | (done by the caller) in which a file with the same name could | |
213 | be created. */ | |
214 | char *buf = ((struct sockaddr_un *) (*pai)->ai_addr)->sun_path; | |
215 | ||
216 | if (__builtin_expect (__path_search (buf, L_tmpnam, NULL, NULL, 0), | |
217 | 0) != 0 | |
218 | || __builtin_expect (__gen_tempname (buf, __GT_NOCREATE), 0) != 0) | |
40a55d20 UD |
219 | return -EAI_SYSTEM; |
220 | } | |
221 | ||
1fb05e3d | 222 | if (req->ai_flags & AI_CANONNAME) |
a0bf6ac7 UD |
223 | (*pai)->ai_canonname = strcpy ((char *) *pai + sizeof (struct addrinfo) |
224 | + sizeof (struct sockaddr_un), | |
225 | utsname.nodename); | |
1fb05e3d UD |
226 | else |
227 | (*pai)->ai_canonname = NULL; | |
228 | return 0; | |
40a55d20 | 229 | } |
64b7897d | 230 | #endif /* 0 */ |
46ec036d | 231 | |
40a55d20 | 232 | static int |
3e2d61a3 | 233 | gaih_inet_serv (const char *servicename, const struct gaih_typeproto *tp, |
85599e53 | 234 | const struct addrinfo *req, struct gaih_servtuple *st) |
46ec036d UD |
235 | { |
236 | struct servent *s; | |
40a55d20 | 237 | size_t tmpbuflen = 1024; |
993b3242 | 238 | struct servent ts; |
40a55d20 UD |
239 | char *tmpbuf; |
240 | int r; | |
241 | ||
242 | do | |
993b3242 | 243 | { |
40a55d20 | 244 | tmpbuf = __alloca (tmpbuflen); |
40a55d20 UD |
245 | |
246 | r = __getservbyname_r (servicename, tp->name, &ts, tmpbuf, tmpbuflen, | |
247 | &s); | |
a0bf6ac7 | 248 | if (r != 0 || s == NULL) |
993b3242 | 249 | { |
a0bf6ac7 | 250 | if (r == ERANGE) |
40a55d20 UD |
251 | tmpbuflen *= 2; |
252 | else | |
253 | return GAIH_OKIFUNSPEC | -EAI_SERVICE; | |
993b3242 UD |
254 | } |
255 | } | |
40a55d20 | 256 | while (r); |
993b3242 | 257 | |
238ae1eb UD |
258 | st->next = NULL; |
259 | st->socktype = tp->socktype; | |
85599e53 UD |
260 | st->protocol = ((tp->protoflag & GAI_PROTO_PROTOANY) |
261 | ? req->ai_protocol : tp->protocol); | |
238ae1eb | 262 | st->port = s->s_port; |
46ec036d UD |
263 | |
264 | return 0; | |
265 | } | |
266 | ||
40a55d20 UD |
267 | #define gethosts(_family, _type) \ |
268 | { \ | |
269 | int i, herrno; \ | |
270 | size_t tmpbuflen; \ | |
271 | struct hostent th; \ | |
272 | char *tmpbuf; \ | |
273 | tmpbuflen = 512; \ | |
7813b61a | 274 | no_data = 0; \ |
40a55d20 UD |
275 | do { \ |
276 | tmpbuflen *= 2; \ | |
277 | tmpbuf = __alloca (tmpbuflen); \ | |
40a55d20 UD |
278 | rc = __gethostbyname2_r (name, _family, &th, tmpbuf, \ |
279 | tmpbuflen, &h, &herrno); \ | |
4fe53b3a | 280 | } while (rc == ERANGE && herrno == NETDB_INTERNAL); \ |
fb7268b2 | 281 | if (rc != 0) \ |
40a55d20 | 282 | { \ |
fb7268b2 UD |
283 | if (herrno == NETDB_INTERNAL) \ |
284 | { \ | |
285 | __set_h_errno (herrno); \ | |
286 | return -EAI_SYSTEM; \ | |
287 | } \ | |
288 | if (herrno == TRY_AGAIN) \ | |
7813b61a UD |
289 | no_data = EAI_AGAIN; \ |
290 | else \ | |
291 | no_data = herrno == NO_DATA; \ | |
40a55d20 | 292 | } \ |
7813b61a | 293 | else if (h != NULL) \ |
40a55d20 UD |
294 | { \ |
295 | for (i = 0; h->h_addr_list[i]; i++) \ | |
296 | { \ | |
85599e53 | 297 | if (*pat == NULL) { \ |
a0bf6ac7 | 298 | *pat = __alloca (sizeof(struct gaih_addrtuple)); \ |
85599e53 UD |
299 | (*pat)->scopeid = 0; \ |
300 | } \ | |
40a55d20 UD |
301 | (*pat)->next = NULL; \ |
302 | (*pat)->family = _family; \ | |
303 | memcpy ((*pat)->addr, h->h_addr_list[i], \ | |
304 | sizeof(_type)); \ | |
305 | pat = &((*pat)->next); \ | |
306 | } \ | |
307 | } \ | |
308 | } | |
309 | ||
310 | static int | |
311 | gaih_inet (const char *name, const struct gaih_service *service, | |
312 | const struct addrinfo *req, struct addrinfo **pai) | |
46ec036d | 313 | { |
3e2d61a3 UD |
314 | const struct gaih_typeproto *tp = gaih_inet_typeproto; |
315 | struct gaih_servtuple *st = (struct gaih_servtuple *) &nullserv; | |
1fb05e3d | 316 | struct gaih_addrtuple *at = NULL; |
40a55d20 | 317 | int rc; |
46ec036d | 318 | |
40a55d20 UD |
319 | if (req->ai_protocol || req->ai_socktype) |
320 | { | |
f3ac48d0 UD |
321 | ++tp; |
322 | ||
4b1fef84 | 323 | while (tp->name[0] |
3a47453d UD |
324 | && ((req->ai_socktype != 0 && req->ai_socktype != tp->socktype) |
325 | || (req->ai_protocol != 0 | |
85599e53 | 326 | && !(tp->protoflag & GAI_PROTO_PROTOANY) |
3a47453d | 327 | && req->ai_protocol != tp->protocol))) |
f3ac48d0 UD |
328 | ++tp; |
329 | ||
4b1fef84 | 330 | if (! tp->name[0]) |
6e4c40ba UD |
331 | { |
332 | if (req->ai_socktype) | |
333 | return (GAIH_OKIFUNSPEC | -EAI_SOCKTYPE); | |
334 | else | |
335 | return (GAIH_OKIFUNSPEC | -EAI_SERVICE); | |
336 | } | |
40a55d20 UD |
337 | } |
338 | ||
339 | if (service != NULL) | |
340 | { | |
f3ac48d0 UD |
341 | if ((tp->protoflag & GAI_PROTO_NOSERVICE) != 0) |
342 | return (GAIH_OKIFUNSPEC | -EAI_SERVICE); | |
343 | ||
40a55d20 UD |
344 | if (service->num < 0) |
345 | { | |
4b1fef84 | 346 | if (tp->name[0]) |
40a55d20 | 347 | { |
238ae1eb UD |
348 | st = (struct gaih_servtuple *) |
349 | __alloca (sizeof (struct gaih_servtuple)); | |
350 | ||
85599e53 | 351 | if ((rc = gaih_inet_serv (service->name, tp, req, st))) |
40a55d20 UD |
352 | return rc; |
353 | } | |
354 | else | |
355 | { | |
356 | struct gaih_servtuple **pst = &st; | |
4b1fef84 | 357 | for (tp++; tp->name[0]; tp++) |
40a55d20 | 358 | { |
3a47453d UD |
359 | struct gaih_servtuple *newp; |
360 | ||
361 | if ((tp->protoflag & GAI_PROTO_NOSERVICE) != 0) | |
362 | continue; | |
363 | ||
84a4fd33 UD |
364 | if (req->ai_socktype != 0 |
365 | && req->ai_socktype != tp->socktype) | |
366 | continue; | |
85599e53 UD |
367 | if (req->ai_protocol != 0 |
368 | && !(tp->protoflag & GAI_PROTO_PROTOANY) | |
369 | && req->ai_protocol != tp->protocol) | |
370 | continue; | |
84a4fd33 | 371 | |
3a47453d | 372 | newp = (struct gaih_servtuple *) |
238ae1eb UD |
373 | __alloca (sizeof (struct gaih_servtuple)); |
374 | ||
85599e53 | 375 | if ((rc = gaih_inet_serv (service->name, tp, req, newp))) |
40a55d20 UD |
376 | { |
377 | if (rc & GAIH_OKIFUNSPEC) | |
378 | continue; | |
379 | return rc; | |
380 | } | |
238ae1eb UD |
381 | |
382 | *pst = newp; | |
383 | pst = &(newp->next); | |
40a55d20 | 384 | } |
3e2d61a3 | 385 | if (st == (struct gaih_servtuple *) &nullserv) |
40a55d20 UD |
386 | return (GAIH_OKIFUNSPEC | -EAI_SERVICE); |
387 | } | |
46ec036d | 388 | } |
40a55d20 UD |
389 | else |
390 | { | |
a0bf6ac7 | 391 | st = __alloca (sizeof (struct gaih_servtuple)); |
40a55d20 UD |
392 | st->next = NULL; |
393 | st->socktype = tp->socktype; | |
85599e53 UD |
394 | st->protocol = ((tp->protoflag & GAI_PROTO_PROTOANY) |
395 | ? req->ai_protocol : tp->protocol); | |
40a55d20 | 396 | st->port = htons (service->num); |
46ec036d | 397 | } |
40a55d20 | 398 | } |
84a4fd33 UD |
399 | else if (req->ai_socktype || req->ai_protocol) |
400 | { | |
401 | st = __alloca (sizeof (struct gaih_servtuple)); | |
402 | st->next = NULL; | |
85599e53 UD |
403 | st->socktype = tp->socktype; |
404 | st->protocol = ((tp->protoflag & GAI_PROTO_PROTOANY) | |
405 | ? req->ai_protocol : tp->protocol); | |
84a4fd33 UD |
406 | st->port = 0; |
407 | } | |
408 | else | |
409 | { | |
410 | /* Neither socket type nor protocol is set. Return all socket types | |
411 | we know about. */ | |
412 | struct gaih_servtuple **lastp = &st; | |
4b1fef84 | 413 | for (++tp; tp->name[0]; ++tp) |
84a4fd33 UD |
414 | { |
415 | struct gaih_servtuple *newp; | |
416 | ||
417 | newp = __alloca (sizeof (struct gaih_servtuple)); | |
418 | newp->next = NULL; | |
419 | newp->socktype = tp->socktype; | |
420 | newp->protocol = tp->protocol; | |
421 | newp->port = 0; | |
422 | ||
423 | *lastp = newp; | |
424 | lastp = &newp->next; | |
425 | } | |
426 | } | |
40a55d20 UD |
427 | |
428 | if (name != NULL) | |
429 | { | |
a0bf6ac7 | 430 | at = __alloca (sizeof (struct gaih_addrtuple)); |
46ec036d | 431 | |
a0bf6ac7 | 432 | at->family = AF_UNSPEC; |
c0bc5f7b | 433 | at->scopeid = 0; |
40a55d20 | 434 | at->next = NULL; |
46ec036d | 435 | |
a0bf6ac7 UD |
436 | if (inet_pton (AF_INET, name, at->addr) > 0) |
437 | { | |
438 | if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET) | |
439 | at->family = AF_INET; | |
440 | else | |
441 | return -EAI_ADDRFAMILY; | |
442 | } | |
46ec036d | 443 | |
c0bc5f7b | 444 | if (at->family == AF_UNSPEC) |
a0bf6ac7 | 445 | { |
c0bc5f7b UD |
446 | char *namebuf = strdupa (name); |
447 | char *scope_delim; | |
448 | ||
449 | scope_delim = strchr (namebuf, SCOPE_DELIMITER); | |
450 | if (scope_delim != NULL) | |
451 | *scope_delim = '\0'; | |
452 | ||
453 | if (inet_pton (AF_INET6, namebuf, at->addr) > 0) | |
454 | { | |
c0bc5f7b UD |
455 | if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6) |
456 | at->family = AF_INET6; | |
457 | else | |
458 | return -EAI_ADDRFAMILY; | |
459 | ||
460 | if (scope_delim != NULL) | |
461 | { | |
462 | int try_numericscope = 0; | |
463 | if (IN6_IS_ADDR_LINKLOCAL (at->addr) | |
464 | || IN6_IS_ADDR_MC_LINKLOCAL (at->addr)) | |
465 | { | |
466 | at->scopeid = if_nametoindex (scope_delim + 1); | |
467 | if (at->scopeid == 0) | |
468 | try_numericscope = 1; | |
469 | } | |
470 | else | |
471 | try_numericscope = 1; | |
472 | ||
473 | if (try_numericscope != 0) | |
474 | { | |
475 | char *end; | |
476 | assert (sizeof (uint32_t) <= sizeof (unsigned long)); | |
477 | at->scopeid = (uint32_t) strtoul (scope_delim + 1, &end, | |
478 | 10); | |
479 | if (*end != '\0') | |
480 | return GAIH_OKIFUNSPEC | -EAI_NONAME; | |
481 | } | |
482 | } | |
483 | } | |
a0bf6ac7 | 484 | } |
40a55d20 | 485 | |
ce75c139 | 486 | if (at->family == AF_UNSPEC && (req->ai_flags & AI_NUMERICHOST) == 0) |
40a55d20 UD |
487 | { |
488 | struct hostent *h; | |
489 | struct gaih_addrtuple **pat = &at; | |
a0bf6ac7 | 490 | int no_data = 0; |
5ad81f40 | 491 | int no_inet6_data; |
9c42c64d UD |
492 | int old_res_options = _res.options; |
493 | ||
494 | /* If we are looking for both IPv4 and IPv6 address we don't | |
495 | want the lookup functions to automatically promote IPv4 | |
496 | addresses to IPv6 addresses. Currently this is decided | |
497 | by setting the RES_USE_INET6 bit in _res.options. */ | |
498 | if (req->ai_family == AF_UNSPEC) | |
499 | _res.options &= ~RES_USE_INET6; | |
40a55d20 | 500 | |
7396d844 | 501 | if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6) |
40a55d20 | 502 | gethosts (AF_INET6, struct in6_addr); |
5ad81f40 | 503 | no_inet6_data = no_data; |
40a55d20 | 504 | |
9c42c64d UD |
505 | if (req->ai_family == AF_UNSPEC) |
506 | _res.options = old_res_options; | |
507 | ||
7396d844 | 508 | if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET) |
40a55d20 | 509 | gethosts (AF_INET, struct in_addr); |
a0bf6ac7 | 510 | |
5ad81f40 | 511 | if (no_data != 0 && no_inet6_data != 0) |
7813b61a UD |
512 | { |
513 | /* If both requests timed out report this. */ | |
514 | if (no_data == EAI_AGAIN && no_inet6_data == EAI_AGAIN) | |
515 | return -EAI_AGAIN; | |
516 | ||
517 | /* We made requests but they turned out no data. The name | |
518 | is known, though. */ | |
519 | return (GAIH_OKIFUNSPEC | -EAI_NODATA); | |
520 | } | |
46ec036d | 521 | } |
40a55d20 UD |
522 | |
523 | if (at->family == AF_UNSPEC) | |
524 | return (GAIH_OKIFUNSPEC | -EAI_NONAME); | |
46ec036d | 525 | } |
40a55d20 UD |
526 | else |
527 | { | |
7396d844 | 528 | struct gaih_addrtuple *atr; |
a0bf6ac7 UD |
529 | atr = at = __alloca (sizeof (struct gaih_addrtuple)); |
530 | memset (at, '\0', sizeof (struct gaih_addrtuple)); | |
40a55d20 | 531 | |
7396d844 UD |
532 | if (req->ai_family == 0) |
533 | { | |
a0bf6ac7 UD |
534 | at->next = __alloca (sizeof (struct gaih_addrtuple)); |
535 | memset (at->next, '\0', sizeof (struct gaih_addrtuple)); | |
7396d844 | 536 | } |
40a55d20 | 537 | |
7396d844 UD |
538 | if (req->ai_family == 0 || req->ai_family == AF_INET6) |
539 | { | |
540 | at->family = AF_INET6; | |
541 | if ((req->ai_flags & AI_PASSIVE) == 0) | |
a585ba22 | 542 | memcpy (at->addr, &in6addr_loopback, sizeof (struct in6_addr)); |
7396d844 UD |
543 | atr = at->next; |
544 | } | |
40a55d20 | 545 | |
7396d844 UD |
546 | if (req->ai_family == 0 || req->ai_family == AF_INET) |
547 | { | |
548 | atr->family = AF_INET; | |
549 | if ((req->ai_flags & AI_PASSIVE) == 0) | |
550 | *(uint32_t *) atr->addr = htonl (INADDR_LOOPBACK); | |
551 | } | |
46ec036d | 552 | } |
1fb05e3d | 553 | |
40a55d20 UD |
554 | if (pai == NULL) |
555 | return 0; | |
46ec036d UD |
556 | |
557 | { | |
558 | const char *c = NULL; | |
559 | struct gaih_servtuple *st2; | |
560 | struct gaih_addrtuple *at2 = at; | |
40a55d20 | 561 | size_t socklen, namelen; |
85599e53 | 562 | sa_family_t family; |
40a55d20 | 563 | |
f21acc89 UD |
564 | /* |
565 | buffer is the size of an unformatted IPv6 address in printable format. | |
566 | */ | |
567 | char buffer[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"]; | |
46ec036d | 568 | |
40a55d20 UD |
569 | while (at2 != NULL) |
570 | { | |
571 | if (req->ai_flags & AI_CANONNAME) | |
572 | { | |
573 | struct hostent *h = NULL; | |
46ec036d | 574 | |
40a55d20 UD |
575 | int herrno; |
576 | struct hostent th; | |
577 | size_t tmpbuflen = 512; | |
578 | char *tmpbuf; | |
46ec036d | 579 | |
40a55d20 UD |
580 | do |
581 | { | |
582 | tmpbuflen *= 2; | |
583 | tmpbuf = __alloca (tmpbuflen); | |
46ec036d | 584 | |
40a55d20 UD |
585 | if (tmpbuf == NULL) |
586 | return -EAI_MEMORY; | |
587 | ||
588 | rc = __gethostbyaddr_r (at2->addr, | |
589 | ((at2->family == AF_INET6) | |
590 | ? sizeof(struct in6_addr) | |
591 | : sizeof(struct in_addr)), | |
592 | at2->family, &th, tmpbuf, tmpbuflen, | |
593 | &h, &herrno); | |
594 | ||
595 | } | |
a0bf6ac7 | 596 | while (rc == errno && herrno == NETDB_INTERNAL); |
40a55d20 | 597 | |
a0bf6ac7 | 598 | if (rc != 0 && herrno == NETDB_INTERNAL) |
40a55d20 UD |
599 | { |
600 | __set_h_errno (herrno); | |
601 | return -EAI_SYSTEM; | |
602 | } | |
603 | ||
604 | if (h == NULL) | |
605 | c = inet_ntop (at2->family, at2->addr, buffer, sizeof(buffer)); | |
606 | else | |
607 | c = h->h_name; | |
608 | ||
609 | if (c == NULL) | |
610 | return GAIH_OKIFUNSPEC | -EAI_NONAME; | |
611 | ||
612 | namelen = strlen (c) + 1; | |
613 | } | |
614 | else | |
615 | namelen = 0; | |
616 | ||
617 | if (at2->family == AF_INET6) | |
85599e53 UD |
618 | { |
619 | family = AF_INET6; | |
620 | socklen = sizeof (struct sockaddr_in6); | |
621 | } | |
40a55d20 | 622 | else |
85599e53 UD |
623 | { |
624 | family = AF_INET; | |
625 | socklen = sizeof (struct sockaddr_in); | |
626 | } | |
40a55d20 UD |
627 | |
628 | for (st2 = st; st2 != NULL; st2 = st2->next) | |
629 | { | |
630 | *pai = malloc (sizeof (struct addrinfo) + socklen + namelen); | |
631 | if (*pai == NULL) | |
632 | return -EAI_MEMORY; | |
633 | ||
634 | (*pai)->ai_flags = req->ai_flags; | |
85599e53 | 635 | (*pai)->ai_family = family; |
40a55d20 UD |
636 | (*pai)->ai_socktype = st2->socktype; |
637 | (*pai)->ai_protocol = st2->protocol; | |
638 | (*pai)->ai_addrlen = socklen; | |
639 | (*pai)->ai_addr = (void *) (*pai) + sizeof(struct addrinfo); | |
46ec036d | 640 | #if SALEN |
c0bc5f7b | 641 | (*pai)->ai_addr->sa_len = socklen; |
46ec036d | 642 | #endif /* SALEN */ |
85599e53 | 643 | (*pai)->ai_addr->sa_family = family; |
5a97622d | 644 | |
85599e53 | 645 | if (family == AF_INET6) |
40a55d20 UD |
646 | { |
647 | struct sockaddr_in6 *sin6p = | |
648 | (struct sockaddr_in6 *) (*pai)->ai_addr; | |
46ec036d | 649 | |
40a55d20 UD |
650 | sin6p->sin6_flowinfo = 0; |
651 | memcpy (&sin6p->sin6_addr, | |
652 | at2->addr, sizeof (struct in6_addr)); | |
c0bc5f7b UD |
653 | sin6p->sin6_port = st2->port; |
654 | sin6p->sin6_scope_id = at2->scopeid; | |
40a55d20 UD |
655 | } |
656 | else | |
657 | { | |
658 | struct sockaddr_in *sinp = | |
659 | (struct sockaddr_in *) (*pai)->ai_addr; | |
660 | memcpy (&sinp->sin_addr, | |
661 | at2->addr, sizeof (struct in_addr)); | |
c0bc5f7b | 662 | sinp->sin_port = st2->port; |
40a55d20 UD |
663 | memset (sinp->sin_zero, '\0', sizeof (sinp->sin_zero)); |
664 | } | |
46ec036d | 665 | |
40a55d20 UD |
666 | if (c) |
667 | { | |
668 | (*pai)->ai_canonname = ((void *) (*pai) + | |
669 | sizeof (struct addrinfo) + socklen); | |
670 | strcpy ((*pai)->ai_canonname, c); | |
671 | } | |
672 | else | |
673 | (*pai)->ai_canonname = NULL; | |
46ec036d | 674 | |
40a55d20 UD |
675 | (*pai)->ai_next = NULL; |
676 | pai = &((*pai)->ai_next); | |
677 | } | |
46ec036d | 678 | |
40a55d20 UD |
679 | at2 = at2->next; |
680 | } | |
46ec036d | 681 | } |
40a55d20 | 682 | return 0; |
46ec036d UD |
683 | } |
684 | ||
40a55d20 UD |
685 | static struct gaih gaih[] = |
686 | { | |
687 | { PF_INET6, gaih_inet }, | |
688 | { PF_INET, gaih_inet }, | |
64b7897d | 689 | #if 0 |
40a55d20 | 690 | { PF_LOCAL, gaih_local }, |
64b7897d | 691 | #endif |
40a55d20 UD |
692 | { PF_UNSPEC, NULL } |
693 | }; | |
46ec036d | 694 | |
40a55d20 UD |
695 | int |
696 | getaddrinfo (const char *name, const char *service, | |
697 | const struct addrinfo *hints, struct addrinfo **pai) | |
46ec036d | 698 | { |
a0bf6ac7 | 699 | int i = 0, j = 0, last_i = 0; |
1fb05e3d | 700 | struct addrinfo *p = NULL, **end; |
46ec036d UD |
701 | struct gaih *g = gaih, *pg = NULL; |
702 | struct gaih_service gaih_service, *pservice; | |
703 | ||
40a55d20 | 704 | if (name != NULL && name[0] == '*' && name[1] == 0) |
1fb05e3d UD |
705 | name = NULL; |
706 | ||
40a55d20 | 707 | if (service != NULL && service[0] == '*' && service[1] == 0) |
1fb05e3d UD |
708 | service = NULL; |
709 | ||
40a55d20 | 710 | if (name == NULL && service == NULL) |
46ec036d UD |
711 | return EAI_NONAME; |
712 | ||
40a55d20 UD |
713 | if (hints == NULL) |
714 | hints = &default_hints; | |
46ec036d | 715 | |
b09bb958 | 716 | if (hints->ai_flags & ~(AI_PASSIVE|AI_CANONNAME|AI_NUMERICHOST)) |
46ec036d UD |
717 | return EAI_BADFLAGS; |
718 | ||
40a55d20 | 719 | if ((hints->ai_flags & AI_CANONNAME) && name == NULL) |
46ec036d UD |
720 | return EAI_BADFLAGS; |
721 | ||
40a55d20 UD |
722 | if (service && service[0]) |
723 | { | |
724 | char *c; | |
725 | gaih_service.name = service; | |
726 | gaih_service.num = strtoul (gaih_service.name, &c, 10); | |
727 | if (*c) | |
728 | gaih_service.num = -1; | |
1fb05e3d | 729 | else |
40a55d20 UD |
730 | /* Can't specify a numerical socket unless a protocol family was |
731 | given. */ | |
85599e53 | 732 | if (hints->ai_socktype == 0 && hints->ai_protocol == 0) |
1fb05e3d | 733 | return EAI_SERVICE; |
40a55d20 UD |
734 | pservice = &gaih_service; |
735 | } | |
736 | else | |
46ec036d UD |
737 | pservice = NULL; |
738 | ||
1fb05e3d UD |
739 | if (pai) |
740 | end = &p; | |
741 | else | |
742 | end = NULL; | |
743 | ||
40a55d20 UD |
744 | while (g->gaih) |
745 | { | |
7396d844 | 746 | if (hints->ai_family == g->family || hints->ai_family == AF_UNSPEC) |
40a55d20 UD |
747 | { |
748 | j++; | |
7396d844 | 749 | if (pg == NULL || pg->gaih != g->gaih) |
40a55d20 UD |
750 | { |
751 | pg = g; | |
7396d844 UD |
752 | i = g->gaih (name, pservice, hints, end); |
753 | if (i != 0) | |
40a55d20 | 754 | { |
a0bf6ac7 UD |
755 | /* EAI_NODATA is a more specific result as it says that |
756 | we found a result but it is not usable. */ | |
757 | if (last_i != (GAIH_OKIFUNSPEC | -EAI_NODATA)) | |
758 | last_i = i; | |
759 | ||
7396d844 | 760 | if (hints->ai_family == AF_UNSPEC && (i & GAIH_OKIFUNSPEC)) |
40a55d20 UD |
761 | continue; |
762 | ||
763 | if (p) | |
764 | freeaddrinfo (p); | |
765 | ||
7396d844 | 766 | return -(i & GAIH_EAI); |
40a55d20 UD |
767 | } |
768 | if (end) | |
769 | while(*end) end = &((*end)->ai_next); | |
770 | } | |
46ec036d | 771 | } |
40a55d20 | 772 | ++g; |
46ec036d | 773 | } |
46ec036d | 774 | |
40a55d20 | 775 | if (j == 0) |
46ec036d UD |
776 | return EAI_FAMILY; |
777 | ||
40a55d20 UD |
778 | if (p) |
779 | { | |
780 | *pai = p; | |
781 | return 0; | |
782 | } | |
46ec036d | 783 | |
a0bf6ac7 | 784 | if (pai == NULL && last_i == 0) |
1fb05e3d UD |
785 | return 0; |
786 | ||
46ec036d | 787 | if (p) |
40a55d20 | 788 | freeaddrinfo (p); |
46ec036d | 789 | |
a0bf6ac7 | 790 | return last_i ? -(last_i & GAIH_EAI) : EAI_NONAME; |
46ec036d | 791 | } |
9b0b40d3 | 792 | libc_hidden_def (getaddrinfo) |
46ec036d | 793 | |
40a55d20 UD |
794 | void |
795 | freeaddrinfo (struct addrinfo *ai) | |
46ec036d UD |
796 | { |
797 | struct addrinfo *p; | |
798 | ||
40a55d20 UD |
799 | while (ai != NULL) |
800 | { | |
801 | p = ai; | |
802 | ai = ai->ai_next; | |
803 | free (p); | |
804 | } | |
46ec036d | 805 | } |
9b0b40d3 | 806 | libc_hidden_def (freeaddrinfo) |