]>
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 | 38 | #include <assert.h> |
77dd4c3b | 39 | #include <ctype.h> |
c0bc5f7b | 40 | #include <errno.h> |
925c3c5c | 41 | #include <ifaddrs.h> |
c0bc5f7b | 42 | #include <netdb.h> |
1eb946b9 | 43 | #include <nss.h> |
9c42c64d | 44 | #include <resolv.h> |
f24dca48 | 45 | #include <stdbool.h> |
c0bc5f7b | 46 | #include <stdio.h> |
77dd4c3b | 47 | #include <stdio_ext.h> |
46ec036d | 48 | #include <stdlib.h> |
c0bc5f7b | 49 | #include <string.h> |
e054f494 | 50 | #include <stdint.h> |
c0bc5f7b | 51 | #include <arpa/inet.h> |
77dd4c3b | 52 | #include <net/if.h> |
a334319f | 53 | #include <netinet/in.h> |
77dd4c3b UD |
54 | #include <sys/socket.h> |
55 | #include <sys/stat.h> | |
c0bc5f7b UD |
56 | #include <sys/types.h> |
57 | #include <sys/un.h> | |
58 | #include <sys/utsname.h> | |
77dd4c3b | 59 | #include <unistd.h> |
218d76e0 | 60 | #include <nsswitch.h> |
77dd4c3b | 61 | #include <bits/libc-lock.h> |
5ddb5bf5 | 62 | #include <not-cancel.h> |
d19687d6 | 63 | #include <nscd/nscd-client.h> |
62417d7e | 64 | #include <nscd/nscd_proto.h> |
1f039824 | 65 | #include <resolv/res_hconf.h> |
1fb05e3d | 66 | |
de079fee | 67 | #ifdef HAVE_LIBIDN |
e2fd3cbe | 68 | extern int __idna_to_ascii_lz (const char *input, char **output, int flags); |
de079fee UD |
69 | extern int __idna_to_unicode_lzlz (const char *input, char **output, |
70 | int flags); | |
71 | # include <libidn/idna.h> | |
72 | #endif | |
e2fd3cbe | 73 | |
46ec036d UD |
74 | #define GAIH_OKIFUNSPEC 0x0100 |
75 | #define GAIH_EAI ~(GAIH_OKIFUNSPEC) | |
76 | ||
40a55d20 | 77 | #ifndef UNIX_PATH_MAX |
3af48b5b | 78 | # define UNIX_PATH_MAX 108 |
40a55d20 | 79 | #endif |
46ec036d | 80 | |
40a55d20 UD |
81 | struct gaih_service |
82 | { | |
83 | const char *name; | |
84 | int num; | |
85 | }; | |
46ec036d | 86 | |
40a55d20 UD |
87 | struct gaih_servtuple |
88 | { | |
89 | struct gaih_servtuple *next; | |
90 | int socktype; | |
91 | int protocol; | |
92 | int port; | |
93 | }; | |
46ec036d | 94 | |
3e2d61a3 | 95 | static const struct gaih_servtuple nullserv; |
46ec036d | 96 | |
46ec036d | 97 | |
40a55d20 UD |
98 | struct gaih_typeproto |
99 | { | |
100 | int socktype; | |
101 | int protocol; | |
372bfcac UD |
102 | uint8_t protoflag; |
103 | bool defaultflag; | |
104 | char name[8]; | |
40a55d20 | 105 | }; |
46ec036d | 106 | |
f3ac48d0 UD |
107 | /* Values for `protoflag'. */ |
108 | #define GAI_PROTO_NOSERVICE 1 | |
85599e53 | 109 | #define GAI_PROTO_PROTOANY 2 |
f3ac48d0 | 110 | |
3e2d61a3 | 111 | static const struct gaih_typeproto gaih_inet_typeproto[] = |
40a55d20 | 112 | { |
372bfcac UD |
113 | { 0, 0, 0, false, "" }, |
114 | { SOCK_STREAM, IPPROTO_TCP, 0, true, "tcp" }, | |
115 | { SOCK_DGRAM, IPPROTO_UDP, 0, true, "udp" }, | |
116 | #if defined SOCK_DCCP && defined IPPROTO_DCCP | |
117 | { SOCK_DCCP, IPPROTO_DCCP, 0, false, "dccp" }, | |
118 | #endif | |
119 | #ifdef IPPROTO_UDPLITE | |
120 | { SOCK_DGRAM, IPPROTO_UDPLITE, 0, false, "udplite" }, | |
18a74157 UD |
121 | #endif |
122 | #ifdef IPPROTO_SCTP | |
123 | { SOCK_STREAM, IPPROTO_SCTP, 0, false, "sctp" }, | |
124 | { SOCK_SEQPACKET, IPPROTO_SCTP, 0, false, "sctp" }, | |
372bfcac UD |
125 | #endif |
126 | { SOCK_RAW, 0, GAI_PROTO_PROTOANY|GAI_PROTO_NOSERVICE, true, "raw" }, | |
127 | { 0, 0, 0, false, "" } | |
46ec036d UD |
128 | }; |
129 | ||
40a55d20 UD |
130 | struct gaih |
131 | { | |
132 | int family; | |
133 | int (*gaih)(const char *name, const struct gaih_service *service, | |
01abbc0f UD |
134 | const struct addrinfo *req, struct addrinfo **pai, |
135 | unsigned int *naddrs); | |
40a55d20 UD |
136 | }; |
137 | ||
3e2d61a3 | 138 | static const struct addrinfo default_hints = |
925c3c5c UD |
139 | { |
140 | .ai_flags = AI_DEFAULT, | |
141 | .ai_family = PF_UNSPEC, | |
142 | .ai_socktype = 0, | |
143 | .ai_protocol = 0, | |
144 | .ai_addrlen = 0, | |
145 | .ai_addr = NULL, | |
146 | .ai_canonname = NULL, | |
147 | .ai_next = NULL | |
148 | }; | |
40a55d20 UD |
149 | |
150 | ||
40a55d20 | 151 | static int |
3e2d61a3 | 152 | gaih_inet_serv (const char *servicename, const struct gaih_typeproto *tp, |
3af48b5b | 153 | const struct addrinfo *req, struct gaih_servtuple *st) |
46ec036d UD |
154 | { |
155 | struct servent *s; | |
40a55d20 | 156 | size_t tmpbuflen = 1024; |
993b3242 | 157 | struct servent ts; |
40a55d20 UD |
158 | char *tmpbuf; |
159 | int r; | |
160 | ||
161 | do | |
993b3242 | 162 | { |
40a55d20 | 163 | tmpbuf = __alloca (tmpbuflen); |
40a55d20 UD |
164 | |
165 | r = __getservbyname_r (servicename, tp->name, &ts, tmpbuf, tmpbuflen, | |
166 | &s); | |
a0bf6ac7 | 167 | if (r != 0 || s == NULL) |
993b3242 | 168 | { |
a0bf6ac7 | 169 | if (r == ERANGE) |
40a55d20 UD |
170 | tmpbuflen *= 2; |
171 | else | |
172 | return GAIH_OKIFUNSPEC | -EAI_SERVICE; | |
993b3242 UD |
173 | } |
174 | } | |
40a55d20 | 175 | while (r); |
993b3242 | 176 | |
238ae1eb UD |
177 | st->next = NULL; |
178 | st->socktype = tp->socktype; | |
85599e53 UD |
179 | st->protocol = ((tp->protoflag & GAI_PROTO_PROTOANY) |
180 | ? req->ai_protocol : tp->protocol); | |
238ae1eb | 181 | st->port = s->s_port; |
46ec036d UD |
182 | |
183 | return 0; | |
184 | } | |
185 | ||
925c3c5c | 186 | #define gethosts(_family, _type) \ |
925c3c5c | 187 | { \ |
2d26a717 UD |
188 | int i; \ |
189 | int herrno; \ | |
925c3c5c | 190 | struct hostent th; \ |
a4fdd4b8 | 191 | struct hostent *h; \ |
f04b1e1f | 192 | char *localcanon = NULL; \ |
925c3c5c | 193 | no_data = 0; \ |
2d26a717 | 194 | while (1) { \ |
925c3c5c | 195 | rc = 0; \ |
7a11603d UD |
196 | status = DL_CALL_FCT (fct, (name, _family, &th, tmpbuf, tmpbuflen, \ |
197 | &rc, &herrno, NULL, &localcanon)); \ | |
2d26a717 UD |
198 | if (rc != ERANGE || herrno != NETDB_INTERNAL) \ |
199 | break; \ | |
200 | tmpbuf = extend_alloca (tmpbuf, tmpbuflen, 2 * tmpbuflen); \ | |
201 | } \ | |
925c3c5c UD |
202 | if (status == NSS_STATUS_SUCCESS && rc == 0) \ |
203 | h = &th; \ | |
204 | else \ | |
205 | h = NULL; \ | |
206 | if (rc != 0) \ | |
207 | { \ | |
208 | if (herrno == NETDB_INTERNAL) \ | |
209 | { \ | |
210 | __set_h_errno (herrno); \ | |
7ae22829 | 211 | _res.options |= old_res_options & RES_USE_INET6; \ |
925c3c5c UD |
212 | return -EAI_SYSTEM; \ |
213 | } \ | |
214 | if (herrno == TRY_AGAIN) \ | |
215 | no_data = EAI_AGAIN; \ | |
216 | else \ | |
217 | no_data = herrno == NO_DATA; \ | |
218 | } \ | |
219 | else if (h != NULL) \ | |
220 | { \ | |
221 | for (i = 0; h->h_addr_list[i]; i++) \ | |
222 | { \ | |
28977c2c UD |
223 | if (*pat == NULL) \ |
224 | { \ | |
225 | *pat = __alloca (sizeof (struct gaih_addrtuple)); \ | |
226 | (*pat)->scopeid = 0; \ | |
227 | } \ | |
228 | uint32_t *addr = (*pat)->addr; \ | |
925c3c5c | 229 | (*pat)->next = NULL; \ |
b0d8b23d | 230 | (*pat)->name = i == 0 ? strdupa (h->h_name) : NULL; \ |
28977c2c UD |
231 | if (_family == AF_INET && req->ai_family == AF_INET6) \ |
232 | { \ | |
233 | (*pat)->family = AF_INET6; \ | |
234 | addr[3] = *(uint32_t *) h->h_addr_list[i]; \ | |
235 | addr[2] = htonl (0xffff); \ | |
236 | addr[1] = 0; \ | |
237 | addr[0] = 0; \ | |
238 | } \ | |
239 | else \ | |
240 | { \ | |
241 | (*pat)->family = _family; \ | |
242 | memcpy (addr, h->h_addr_list[i], sizeof(_type)); \ | |
243 | } \ | |
925c3c5c UD |
244 | pat = &((*pat)->next); \ |
245 | } \ | |
28977c2c | 246 | \ |
7a11603d | 247 | if (localcanon != NULL && canon == NULL) \ |
f04b1e1f UD |
248 | canon = strdupa (localcanon); \ |
249 | \ | |
28977c2c UD |
250 | if (_family == AF_INET6 && i > 0) \ |
251 | got_ipv6 = true; \ | |
925c3c5c | 252 | } \ |
218d76e0 UD |
253 | } |
254 | ||
28977c2c | 255 | |
1eb946b9 UD |
256 | typedef enum nss_status (*nss_gethostbyname4_r) |
257 | (const char *name, struct gaih_addrtuple **pat, | |
258 | char *buffer, size_t buflen, int *errnop, | |
259 | int *h_errnop, int32_t *ttlp); | |
f04b1e1f | 260 | typedef enum nss_status (*nss_gethostbyname3_r) |
218d76e0 UD |
261 | (const char *name, int af, struct hostent *host, |
262 | char *buffer, size_t buflen, int *errnop, | |
f04b1e1f | 263 | int *h_errnop, int32_t *ttlp, char **canonp); |
28977c2c UD |
264 | typedef enum nss_status (*nss_getcanonname_r) |
265 | (const char *name, char *buffer, size_t buflen, char **result, | |
266 | int *errnop, int *h_errnop); | |
218d76e0 UD |
267 | extern service_user *__nss_hosts_database attribute_hidden; |
268 | ||
3af48b5b | 269 | |
40a55d20 UD |
270 | static int |
271 | gaih_inet (const char *name, const struct gaih_service *service, | |
01abbc0f UD |
272 | const struct addrinfo *req, struct addrinfo **pai, |
273 | unsigned int *naddrs) | |
46ec036d | 274 | { |
3e2d61a3 UD |
275 | const struct gaih_typeproto *tp = gaih_inet_typeproto; |
276 | struct gaih_servtuple *st = (struct gaih_servtuple *) &nullserv; | |
1fb05e3d | 277 | struct gaih_addrtuple *at = NULL; |
40a55d20 | 278 | int rc; |
925c3c5c | 279 | bool got_ipv6 = false; |
28977c2c | 280 | const char *canon = NULL; |
b6c0f679 | 281 | const char *orig_name = name; |
34a9094f | 282 | size_t alloca_used = 0; |
46ec036d | 283 | |
40a55d20 UD |
284 | if (req->ai_protocol || req->ai_socktype) |
285 | { | |
f3ac48d0 UD |
286 | ++tp; |
287 | ||
4b1fef84 | 288 | while (tp->name[0] |
3a47453d UD |
289 | && ((req->ai_socktype != 0 && req->ai_socktype != tp->socktype) |
290 | || (req->ai_protocol != 0 | |
85599e53 | 291 | && !(tp->protoflag & GAI_PROTO_PROTOANY) |
3a47453d | 292 | && req->ai_protocol != tp->protocol))) |
f3ac48d0 UD |
293 | ++tp; |
294 | ||
4b1fef84 | 295 | if (! tp->name[0]) |
6e4c40ba UD |
296 | { |
297 | if (req->ai_socktype) | |
3af48b5b | 298 | return GAIH_OKIFUNSPEC | -EAI_SOCKTYPE; |
6e4c40ba | 299 | else |
3af48b5b | 300 | return GAIH_OKIFUNSPEC | -EAI_SERVICE; |
6e4c40ba | 301 | } |
40a55d20 UD |
302 | } |
303 | ||
29546dd9 | 304 | int port = 0; |
40a55d20 UD |
305 | if (service != NULL) |
306 | { | |
f3ac48d0 | 307 | if ((tp->protoflag & GAI_PROTO_NOSERVICE) != 0) |
3af48b5b | 308 | return GAIH_OKIFUNSPEC | -EAI_SERVICE; |
f3ac48d0 | 309 | |
40a55d20 UD |
310 | if (service->num < 0) |
311 | { | |
4b1fef84 | 312 | if (tp->name[0]) |
40a55d20 | 313 | { |
238ae1eb | 314 | st = (struct gaih_servtuple *) |
34a9094f | 315 | alloca_account (sizeof (struct gaih_servtuple), alloca_used); |
238ae1eb | 316 | |
85599e53 | 317 | if ((rc = gaih_inet_serv (service->name, tp, req, st))) |
40a55d20 UD |
318 | return rc; |
319 | } | |
320 | else | |
321 | { | |
322 | struct gaih_servtuple **pst = &st; | |
4b1fef84 | 323 | for (tp++; tp->name[0]; tp++) |
40a55d20 | 324 | { |
3a47453d UD |
325 | struct gaih_servtuple *newp; |
326 | ||
327 | if ((tp->protoflag & GAI_PROTO_NOSERVICE) != 0) | |
328 | continue; | |
329 | ||
84a4fd33 UD |
330 | if (req->ai_socktype != 0 |
331 | && req->ai_socktype != tp->socktype) | |
332 | continue; | |
85599e53 UD |
333 | if (req->ai_protocol != 0 |
334 | && !(tp->protoflag & GAI_PROTO_PROTOANY) | |
335 | && req->ai_protocol != tp->protocol) | |
336 | continue; | |
84a4fd33 | 337 | |
3a47453d | 338 | newp = (struct gaih_servtuple *) |
34a9094f UD |
339 | alloca_account (sizeof (struct gaih_servtuple), |
340 | alloca_used); | |
238ae1eb | 341 | |
85599e53 | 342 | if ((rc = gaih_inet_serv (service->name, tp, req, newp))) |
40a55d20 UD |
343 | { |
344 | if (rc & GAIH_OKIFUNSPEC) | |
345 | continue; | |
346 | return rc; | |
347 | } | |
238ae1eb UD |
348 | |
349 | *pst = newp; | |
350 | pst = &(newp->next); | |
40a55d20 | 351 | } |
3e2d61a3 | 352 | if (st == (struct gaih_servtuple *) &nullserv) |
3af48b5b | 353 | return GAIH_OKIFUNSPEC | -EAI_SERVICE; |
40a55d20 | 354 | } |
46ec036d | 355 | } |
40a55d20 UD |
356 | else |
357 | { | |
29546dd9 UD |
358 | port = htons (service->num); |
359 | goto got_port; | |
46ec036d | 360 | } |
40a55d20 | 361 | } |
84a4fd33 UD |
362 | else |
363 | { | |
29546dd9 UD |
364 | got_port: |
365 | ||
366 | if (req->ai_socktype || req->ai_protocol) | |
367 | { | |
34a9094f | 368 | st = alloca_account (sizeof (struct gaih_servtuple), alloca_used); |
29546dd9 UD |
369 | st->next = NULL; |
370 | st->socktype = tp->socktype; | |
371 | st->protocol = ((tp->protoflag & GAI_PROTO_PROTOANY) | |
372 | ? req->ai_protocol : tp->protocol); | |
373 | st->port = port; | |
374 | } | |
375 | else | |
84a4fd33 | 376 | { |
29546dd9 UD |
377 | /* Neither socket type nor protocol is set. Return all socket types |
378 | we know about. */ | |
379 | struct gaih_servtuple **lastp = &st; | |
380 | for (++tp; tp->name[0]; ++tp) | |
372bfcac UD |
381 | if (tp->defaultflag) |
382 | { | |
383 | struct gaih_servtuple *newp; | |
384 | ||
34a9094f UD |
385 | newp = alloca_account (sizeof (struct gaih_servtuple), |
386 | alloca_used); | |
372bfcac UD |
387 | newp->next = NULL; |
388 | newp->socktype = tp->socktype; | |
389 | newp->protocol = tp->protocol; | |
390 | newp->port = port; | |
391 | ||
392 | *lastp = newp; | |
393 | lastp = &newp->next; | |
394 | } | |
84a4fd33 UD |
395 | } |
396 | } | |
40a55d20 | 397 | |
34a9094f UD |
398 | bool malloc_name = false; |
399 | bool malloc_addrmem = false; | |
400 | struct gaih_addrtuple *addrmem = NULL; | |
401 | bool malloc_canonbuf = false; | |
402 | char *canonbuf = NULL; | |
403 | bool malloc_tmpbuf = false; | |
404 | char *tmpbuf = NULL; | |
405 | int result = 0; | |
40a55d20 UD |
406 | if (name != NULL) |
407 | { | |
34a9094f | 408 | at = alloca_account (sizeof (struct gaih_addrtuple), alloca_used); |
a0bf6ac7 | 409 | at->family = AF_UNSPEC; |
c0bc5f7b | 410 | at->scopeid = 0; |
40a55d20 | 411 | at->next = NULL; |
46ec036d | 412 | |
e2fd3cbe UD |
413 | #ifdef HAVE_LIBIDN |
414 | if (req->ai_flags & AI_IDN) | |
415 | { | |
3a0e90bd UD |
416 | int idn_flags = 0; |
417 | if (req->ai_flags & AI_IDN_ALLOW_UNASSIGNED) | |
418 | idn_flags |= IDNA_ALLOW_UNASSIGNED; | |
419 | if (req->ai_flags & AI_IDN_USE_STD3_ASCII_RULES) | |
420 | idn_flags |= IDNA_USE_STD3_ASCII_RULES; | |
421 | ||
e2fd3cbe | 422 | char *p = NULL; |
3a0e90bd | 423 | rc = __idna_to_ascii_lz (name, &p, idn_flags); |
e2fd3cbe | 424 | if (rc != IDNA_SUCCESS) |
de079fee | 425 | { |
34a9094f | 426 | /* No need to jump to free_and_return here. */ |
de079fee UD |
427 | if (rc == IDNA_MALLOC_ERROR) |
428 | return -EAI_MEMORY; | |
429 | if (rc == IDNA_DLOPEN_ERROR) | |
430 | return -EAI_SYSTEM; | |
431 | return -EAI_IDN_ENCODE; | |
432 | } | |
433 | /* In case the output string is the same as the input string | |
434 | no new string has been allocated. */ | |
435 | if (p != name) | |
2e96f1c7 AS |
436 | { |
437 | name = p; | |
438 | malloc_name = true; | |
439 | } | |
e2fd3cbe UD |
440 | } |
441 | #endif | |
442 | ||
c1d98085 | 443 | if (__inet_aton (name, (struct in_addr *) at->addr) != 0) |
a0bf6ac7 UD |
444 | { |
445 | if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET) | |
446 | at->family = AF_INET; | |
846d1362 | 447 | else if (req->ai_family == AF_INET6 && (req->ai_flags & AI_V4MAPPED)) |
925c3c5c | 448 | { |
28977c2c UD |
449 | at->addr[3] = at->addr[0]; |
450 | at->addr[2] = htonl (0xffff); | |
451 | at->addr[1] = 0; | |
452 | at->addr[0] = 0; | |
c1d98085 | 453 | at->family = AF_INET6; |
925c3c5c | 454 | } |
a0bf6ac7 | 455 | else |
34a9094f UD |
456 | { |
457 | result = -EAI_ADDRFAMILY; | |
458 | goto free_and_return; | |
459 | } | |
4376935c | 460 | |
4376935c | 461 | if (req->ai_flags & AI_CANONNAME) |
5b353be3 | 462 | canon = name; |
a0bf6ac7 | 463 | } |
5b353be3 | 464 | else if (at->family == AF_UNSPEC) |
a0bf6ac7 | 465 | { |
abab6859 | 466 | char *scope_delim = strchr (name, SCOPE_DELIMITER); |
34a9094f | 467 | int e; |
c0bc5f7b | 468 | |
34a9094f UD |
469 | { |
470 | bool malloc_namebuf = false; | |
471 | char *namebuf = (char *) name; | |
472 | ||
473 | if (__builtin_expect (scope_delim != NULL, 0)) | |
474 | { | |
475 | if (malloc_name) | |
476 | *scope_delim = '\0'; | |
477 | else | |
478 | { | |
479 | if (__libc_use_alloca (alloca_used | |
480 | + scope_delim - name + 1)) | |
481 | { | |
482 | namebuf = alloca_account (scope_delim - name + 1, | |
483 | alloca_used); | |
484 | *((char *) __mempcpy (namebuf, name, | |
485 | scope_delim - name)) = '\0'; | |
486 | } | |
487 | else | |
488 | { | |
489 | namebuf = strndup (name, scope_delim - name); | |
490 | if (namebuf == NULL) | |
491 | { | |
492 | assert (!malloc_name); | |
493 | return -EAI_MEMORY; | |
494 | } | |
495 | malloc_namebuf = true; | |
496 | } | |
497 | } | |
498 | } | |
499 | ||
500 | e = inet_pton (AF_INET6, namebuf, at->addr); | |
c0bc5f7b | 501 | |
34a9094f UD |
502 | if (malloc_namebuf) |
503 | free (namebuf); | |
504 | else if (scope_delim != NULL && malloc_name) | |
505 | /* Undo what we did above. */ | |
506 | *scope_delim = SCOPE_DELIMITER; | |
507 | } | |
508 | if (e > 0) | |
c0bc5f7b | 509 | { |
c0bc5f7b UD |
510 | if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6) |
511 | at->family = AF_INET6; | |
87bb6b6c UD |
512 | else if (req->ai_family == AF_INET |
513 | && IN6_IS_ADDR_V4MAPPED (at->addr)) | |
514 | { | |
28977c2c | 515 | at->addr[0] = at->addr[3]; |
87bb6b6c UD |
516 | at->family = AF_INET; |
517 | } | |
c0bc5f7b | 518 | else |
34a9094f UD |
519 | { |
520 | result = -EAI_ADDRFAMILY; | |
521 | goto free_and_return; | |
522 | } | |
c0bc5f7b UD |
523 | |
524 | if (scope_delim != NULL) | |
525 | { | |
526 | int try_numericscope = 0; | |
527 | if (IN6_IS_ADDR_LINKLOCAL (at->addr) | |
528 | || IN6_IS_ADDR_MC_LINKLOCAL (at->addr)) | |
529 | { | |
530 | at->scopeid = if_nametoindex (scope_delim + 1); | |
531 | if (at->scopeid == 0) | |
532 | try_numericscope = 1; | |
533 | } | |
534 | else | |
535 | try_numericscope = 1; | |
536 | ||
537 | if (try_numericscope != 0) | |
538 | { | |
539 | char *end; | |
540 | assert (sizeof (uint32_t) <= sizeof (unsigned long)); | |
541 | at->scopeid = (uint32_t) strtoul (scope_delim + 1, &end, | |
542 | 10); | |
543 | if (*end != '\0') | |
34a9094f UD |
544 | { |
545 | result = GAIH_OKIFUNSPEC | -EAI_NONAME; | |
546 | goto free_and_return; | |
547 | } | |
c0bc5f7b UD |
548 | } |
549 | } | |
4376935c | 550 | |
5b353be3 UD |
551 | if (req->ai_flags & AI_CANONNAME) |
552 | canon = name; | |
c0bc5f7b | 553 | } |
a0bf6ac7 | 554 | } |
40a55d20 | 555 | |
ce75c139 | 556 | if (at->family == AF_UNSPEC && (req->ai_flags & AI_NUMERICHOST) == 0) |
40a55d20 | 557 | { |
40a55d20 | 558 | struct gaih_addrtuple **pat = &at; |
a0bf6ac7 | 559 | int no_data = 0; |
218d76e0 | 560 | int no_inet6_data = 0; |
28977c2c UD |
561 | service_user *nip = NULL; |
562 | enum nss_status inet6_status = NSS_STATUS_UNAVAIL; | |
563 | enum nss_status status = NSS_STATUS_UNAVAIL; | |
564 | int no_more; | |
28977c2c | 565 | int old_res_options; |
d19687d6 | 566 | |
0b592a30 MB |
567 | /* If we do not have to look for IPv6 addresses, use |
568 | the simple, old functions, which do not support | |
569 | IPv6 scope ids. */ | |
570 | if (req->ai_family == AF_INET) | |
d19687d6 | 571 | { |
7b6e99be JB |
572 | /* Allocate additional room for struct host_data. */ |
573 | size_t tmpbuflen = (512 + MAX_NR_ALIASES * sizeof(char*) | |
574 | + 16 * sizeof(char)); | |
34a9094f UD |
575 | assert (tmpbuf == NULL); |
576 | tmpbuf = alloca_account (tmpbuflen, alloca_used); | |
d19687d6 UD |
577 | int rc; |
578 | struct hostent th; | |
579 | struct hostent *h; | |
580 | int herrno; | |
581 | ||
d19687d6 UD |
582 | while (1) |
583 | { | |
c5e3c2ae | 584 | rc = __gethostbyname2_r (name, AF_INET, &th, tmpbuf, |
d19687d6 UD |
585 | tmpbuflen, &h, &herrno); |
586 | if (rc != ERANGE || herrno != NETDB_INTERNAL) | |
587 | break; | |
34a9094f UD |
588 | |
589 | if (!malloc_tmpbuf | |
590 | && __libc_use_alloca (alloca_used + 2 * tmpbuflen)) | |
591 | tmpbuf = extend_alloca_account (tmpbuf, tmpbuflen, | |
592 | 2 * tmpbuflen, | |
593 | alloca_used); | |
594 | else | |
595 | { | |
596 | char *newp = realloc (malloc_tmpbuf ? tmpbuf : NULL, | |
597 | 2 * tmpbuflen); | |
598 | if (newp == NULL) | |
599 | { | |
600 | result = -EAI_MEMORY; | |
601 | goto free_and_return; | |
602 | } | |
603 | tmpbuf = newp; | |
604 | malloc_tmpbuf = true; | |
605 | tmpbuflen = 2 * tmpbuflen; | |
606 | } | |
d19687d6 UD |
607 | } |
608 | ||
609 | if (rc == 0) | |
610 | { | |
0b592a30 | 611 | if (h != NULL) |
34a9094f UD |
612 | { |
613 | int i; | |
614 | /* We found data, count the number of addresses. */ | |
615 | for (i = 0; h->h_addr_list[i]; ++i) | |
616 | ; | |
617 | if (i > 0 && *pat != NULL) | |
618 | --i; | |
619 | ||
620 | if (__libc_use_alloca (alloca_used | |
621 | + i * sizeof (struct gaih_addrtuple))) | |
622 | addrmem = alloca_account (i * sizeof (struct gaih_addrtuple), | |
623 | alloca_used); | |
624 | else | |
625 | { | |
626 | addrmem = malloc (i | |
627 | * sizeof (struct gaih_addrtuple)); | |
628 | if (addrmem == NULL) | |
629 | { | |
630 | result = -EAI_MEMORY; | |
631 | goto free_and_return; | |
632 | } | |
633 | malloc_addrmem = true; | |
634 | } | |
635 | ||
636 | /* Now convert it into the list. */ | |
637 | struct gaih_addrtuple *addrfree = addrmem; | |
638 | for (i = 0; h->h_addr_list[i]; ++i) | |
639 | { | |
640 | if (*pat == NULL) | |
641 | { | |
642 | *pat = addrfree++; | |
643 | (*pat)->scopeid = 0; | |
644 | } | |
645 | (*pat)->next = NULL; | |
c5e3c2ae UD |
646 | (*pat)->family = AF_INET; |
647 | memcpy ((*pat)->addr, h->h_addr_list[i], | |
648 | h->h_length); | |
34a9094f UD |
649 | pat = &((*pat)->next); |
650 | } | |
651 | } | |
d19687d6 UD |
652 | } |
653 | else | |
654 | { | |
655 | if (herrno == NETDB_INTERNAL) | |
656 | { | |
657 | __set_h_errno (herrno); | |
34a9094f | 658 | result = -EAI_SYSTEM; |
d19687d6 | 659 | } |
34a9094f UD |
660 | else if (herrno == TRY_AGAIN) |
661 | result = -EAI_AGAIN; | |
662 | else | |
663 | /* We made requests but they turned out no data. | |
664 | The name is known, though. */ | |
665 | result = GAIH_OKIFUNSPEC | -EAI_NODATA; | |
666 | ||
667 | goto free_and_return; | |
d19687d6 UD |
668 | } |
669 | ||
670 | goto process_list; | |
671 | } | |
672 | ||
673 | #ifdef USE_NSCD | |
62417d7e UD |
674 | if (__nss_not_use_nscd_hosts > 0 |
675 | && ++__nss_not_use_nscd_hosts > NSS_NSCD_RETRY) | |
676 | __nss_not_use_nscd_hosts = 0; | |
d19687d6 | 677 | |
c3e2f19b UD |
678 | if (!__nss_not_use_nscd_hosts |
679 | && !__nss_database_custom[NSS_DBSIDX_hosts]) | |
62417d7e UD |
680 | { |
681 | /* Try to use nscd. */ | |
682 | struct nscd_ai_result *air = NULL; | |
683 | int herrno; | |
684 | int err = __nscd_getai (name, &air, &herrno); | |
685 | if (air != NULL) | |
d19687d6 | 686 | { |
62417d7e UD |
687 | /* Transform into gaih_addrtuple list. */ |
688 | bool added_canon = (req->ai_flags & AI_CANONNAME) == 0; | |
689 | char *addrs = air->addrs; | |
d19687d6 | 690 | |
34a9094f UD |
691 | if (__libc_use_alloca (alloca_used |
692 | + air->naddrs * sizeof (struct gaih_addrtuple))) | |
693 | addrmem = alloca_account (air->naddrs | |
694 | * sizeof (struct gaih_addrtuple), | |
695 | alloca_used); | |
696 | else | |
697 | { | |
698 | addrmem = malloc (air->naddrs | |
699 | * sizeof (struct gaih_addrtuple)); | |
700 | if (addrmem == NULL) | |
701 | { | |
702 | result = -EAI_MEMORY; | |
703 | goto free_and_return; | |
704 | } | |
705 | malloc_addrmem = true; | |
706 | } | |
707 | ||
708 | struct gaih_addrtuple *addrfree = addrmem; | |
62417d7e | 709 | for (int i = 0; i < air->naddrs; ++i) |
d19687d6 | 710 | { |
62417d7e UD |
711 | socklen_t size = (air->family[i] == AF_INET |
712 | ? INADDRSZ : IN6ADDRSZ); | |
713 | if (*pat == NULL) | |
714 | { | |
34a9094f | 715 | *pat = addrfree++; |
62417d7e UD |
716 | (*pat)->scopeid = 0; |
717 | } | |
718 | uint32_t *pataddr = (*pat)->addr; | |
719 | (*pat)->next = NULL; | |
720 | if (added_canon || air->canon == NULL) | |
721 | (*pat)->name = NULL; | |
34a9094f UD |
722 | else if (canonbuf == NULL) |
723 | { | |
724 | size_t canonlen = strlen (air->canon) + 1; | |
725 | if ((req->ai_flags & AI_CANONIDN) != 0 | |
726 | && __libc_use_alloca (alloca_used + canonlen)) | |
727 | canonbuf = alloca_account (canonlen, alloca_used); | |
728 | else | |
729 | { | |
730 | canonbuf = malloc (canonlen); | |
731 | if (canonbuf == NULL) | |
732 | { | |
733 | result = -EAI_MEMORY; | |
734 | goto free_and_return; | |
735 | } | |
736 | malloc_canonbuf = true; | |
737 | } | |
738 | canon = (*pat)->name = memcpy (canonbuf, air->canon, | |
739 | canonlen); | |
740 | } | |
62417d7e UD |
741 | |
742 | if (air->family[i] == AF_INET | |
743 | && req->ai_family == AF_INET6 | |
744 | && (req->ai_flags & AI_V4MAPPED)) | |
745 | { | |
746 | (*pat)->family = AF_INET6; | |
747 | pataddr[3] = *(uint32_t *) addrs; | |
748 | pataddr[2] = htonl (0xffff); | |
749 | pataddr[1] = 0; | |
750 | pataddr[0] = 0; | |
751 | pat = &((*pat)->next); | |
752 | added_canon = true; | |
753 | } | |
754 | else if (req->ai_family == AF_UNSPEC | |
755 | || air->family[i] == req->ai_family) | |
756 | { | |
757 | (*pat)->family = air->family[i]; | |
758 | memcpy (pataddr, addrs, size); | |
759 | pat = &((*pat)->next); | |
760 | added_canon = true; | |
761 | if (air->family[i] == AF_INET6) | |
762 | got_ipv6 = true; | |
763 | } | |
764 | addrs += size; | |
d19687d6 | 765 | } |
d19687d6 | 766 | |
6535f55f UD |
767 | free (air); |
768 | ||
62417d7e | 769 | if (at->family == AF_UNSPEC) |
34a9094f UD |
770 | { |
771 | result = GAIH_OKIFUNSPEC | -EAI_NONAME; | |
772 | goto free_and_return; | |
773 | } | |
d19687d6 | 774 | |
62417d7e UD |
775 | goto process_list; |
776 | } | |
66d90496 UD |
777 | else if (err == 0) |
778 | /* The database contains a negative entry. */ | |
34a9094f | 779 | goto free_and_return; |
66d90496 | 780 | else if (__nss_not_use_nscd_hosts == 0) |
62417d7e UD |
781 | { |
782 | if (herrno == NETDB_INTERNAL && errno == ENOMEM) | |
34a9094f UD |
783 | result = -EAI_MEMORY; |
784 | else if (herrno == TRY_AGAIN) | |
785 | result = -EAI_AGAIN; | |
786 | else | |
787 | result = -EAI_SYSTEM; | |
788 | ||
789 | goto free_and_return; | |
62417d7e | 790 | } |
d19687d6 UD |
791 | } |
792 | #endif | |
28977c2c UD |
793 | |
794 | if (__nss_hosts_database != NULL) | |
795 | { | |
796 | no_more = 0; | |
797 | nip = __nss_hosts_database; | |
798 | } | |
799 | else | |
800 | no_more = __nss_database_lookup ("hosts", NULL, | |
801 | "dns [!UNAVAIL=return] files", | |
802 | &nip); | |
803 | ||
d0a1ae94 UD |
804 | /* Initialize configurations. */ |
805 | if (__builtin_expect (!_res_hconf.initialized, 0)) | |
806 | _res_hconf_init (); | |
28977c2c UD |
807 | if (__res_maybe_init (&_res, 0) == -1) |
808 | no_more = 1; | |
809 | ||
9c42c64d UD |
810 | /* If we are looking for both IPv4 and IPv6 address we don't |
811 | want the lookup functions to automatically promote IPv4 | |
812 | addresses to IPv6 addresses. Currently this is decided | |
813 | by setting the RES_USE_INET6 bit in _res.options. */ | |
28977c2c UD |
814 | old_res_options = _res.options; |
815 | _res.options &= ~RES_USE_INET6; | |
40a55d20 | 816 | |
7b6e99be | 817 | size_t tmpbuflen = 1024 + sizeof(struct gaih_addrtuple); |
34a9094f UD |
818 | malloc_tmpbuf = !__libc_use_alloca (alloca_used + tmpbuflen); |
819 | assert (tmpbuf == NULL); | |
3154bfb8 | 820 | if (!malloc_tmpbuf) |
34a9094f UD |
821 | tmpbuf = alloca_account (tmpbuflen, alloca_used); |
822 | else | |
823 | { | |
824 | tmpbuf = malloc (tmpbuflen); | |
825 | if (tmpbuf == NULL) | |
826 | { | |
89f654c5 | 827 | _res.options |= old_res_options & RES_USE_INET6; |
34a9094f UD |
828 | result = -EAI_MEMORY; |
829 | goto free_and_return; | |
830 | } | |
831 | } | |
d19687d6 | 832 | |
28977c2c UD |
833 | while (!no_more) |
834 | { | |
c3dfadb8 | 835 | no_data = 0; |
8479f23a JL |
836 | nss_gethostbyname4_r fct4 = NULL; |
837 | ||
838 | /* gethostbyname4_r sends out parallel A and AAAA queries and | |
839 | is thus only suitable for PF_UNSPEC. */ | |
840 | if (req->ai_family == PF_UNSPEC) | |
841 | fct4 = __nss_lookup_function (nip, "gethostbyname4_r"); | |
842 | ||
1eb946b9 | 843 | if (fct4 != NULL) |
218d76e0 | 844 | { |
1eb946b9 UD |
845 | int herrno; |
846 | ||
847 | while (1) | |
64ab2317 | 848 | { |
1eb946b9 UD |
849 | rc = 0; |
850 | status = DL_CALL_FCT (fct4, (name, pat, tmpbuf, | |
851 | tmpbuflen, &rc, &herrno, | |
852 | NULL)); | |
bfbbc63f UD |
853 | if (status == NSS_STATUS_SUCCESS) |
854 | break; | |
1eb946b9 UD |
855 | if (status != NSS_STATUS_TRYAGAIN |
856 | || rc != ERANGE || herrno != NETDB_INTERNAL) | |
857 | { | |
a682a1bf UD |
858 | if (status == NSS_STATUS_TRYAGAIN |
859 | && herrno == TRY_AGAIN) | |
1eb946b9 UD |
860 | no_data = EAI_AGAIN; |
861 | else | |
862 | no_data = herrno == NO_DATA; | |
863 | break; | |
864 | } | |
34a9094f UD |
865 | |
866 | if (!malloc_tmpbuf | |
867 | && __libc_use_alloca (alloca_used + 2 * tmpbuflen)) | |
868 | tmpbuf = extend_alloca_account (tmpbuf, tmpbuflen, | |
869 | 2 * tmpbuflen, | |
870 | alloca_used); | |
871 | else | |
872 | { | |
873 | char *newp = realloc (malloc_tmpbuf ? tmpbuf : NULL, | |
874 | 2 * tmpbuflen); | |
875 | if (newp == NULL) | |
876 | { | |
89f654c5 | 877 | _res.options |= old_res_options & RES_USE_INET6; |
34a9094f UD |
878 | result = -EAI_MEMORY; |
879 | goto free_and_return; | |
880 | } | |
881 | tmpbuf = newp; | |
882 | malloc_tmpbuf = true; | |
883 | tmpbuflen = 2 * tmpbuflen; | |
884 | } | |
64ab2317 | 885 | } |
1eb946b9 UD |
886 | |
887 | if (status == NSS_STATUS_SUCCESS) | |
28977c2c | 888 | { |
c0244a9d UD |
889 | assert (!no_data); |
890 | no_data = 1; | |
891 | ||
91c8a74b UD |
892 | if ((req->ai_flags & AI_CANONNAME) != 0 && canon == NULL) |
893 | canon = (*pat)->name; | |
218d76e0 | 894 | |
1eb946b9 | 895 | while (*pat != NULL) |
c0244a9d UD |
896 | { |
897 | if ((*pat)->family == AF_INET | |
898 | && req->ai_family == AF_INET6 | |
899 | && (req->ai_flags & AI_V4MAPPED) != 0) | |
900 | { | |
901 | uint32_t *pataddr = (*pat)->addr; | |
902 | (*pat)->family = AF_INET6; | |
903 | pataddr[3] = pataddr[0]; | |
904 | pataddr[2] = htonl (0xffff); | |
905 | pataddr[1] = 0; | |
906 | pataddr[0] = 0; | |
907 | pat = &((*pat)->next); | |
908 | no_data = 0; | |
909 | } | |
e12df166 | 910 | else if (req->ai_family == AF_UNSPEC |
c0244a9d UD |
911 | || (*pat)->family == req->ai_family) |
912 | { | |
913 | pat = &((*pat)->next); | |
914 | ||
915 | no_data = 0; | |
916 | if (req->ai_family == AF_INET6) | |
917 | got_ipv6 = true; | |
918 | } | |
919 | else | |
920 | *pat = ((*pat)->next); | |
921 | } | |
1eb946b9 | 922 | } |
c0244a9d UD |
923 | |
924 | no_inet6_data = no_data; | |
1eb946b9 UD |
925 | } |
926 | else | |
927 | { | |
928 | nss_gethostbyname3_r fct = NULL; | |
929 | if (req->ai_flags & AI_CANONNAME) | |
930 | /* No need to use this function if we do not look for | |
931 | the canonical name. The function does not exist in | |
932 | all NSS modules and therefore the lookup would | |
933 | often fail. */ | |
934 | fct = __nss_lookup_function (nip, "gethostbyname3_r"); | |
935 | if (fct == NULL) | |
936 | /* We are cheating here. The gethostbyname2_r | |
937 | function does not have the same interface as | |
938 | gethostbyname3_r but the extra arguments the | |
939 | latter takes are added at the end. So the | |
940 | gethostbyname2_r code will just ignore them. */ | |
941 | fct = __nss_lookup_function (nip, "gethostbyname2_r"); | |
942 | ||
943 | if (fct != NULL) | |
944 | { | |
945 | if (req->ai_family == AF_INET6 | |
946 | || req->ai_family == AF_UNSPEC) | |
28977c2c | 947 | { |
1eb946b9 | 948 | gethosts (AF_INET6, struct in6_addr); |
28977c2c UD |
949 | no_inet6_data = no_data; |
950 | inet6_status = status; | |
951 | } | |
1eb946b9 UD |
952 | if (req->ai_family == AF_INET |
953 | || req->ai_family == AF_UNSPEC | |
954 | || (req->ai_family == AF_INET6 | |
955 | && (req->ai_flags & AI_V4MAPPED) | |
956 | /* Avoid generating the mapped addresses if we | |
957 | know we are not going to need them. */ | |
958 | && ((req->ai_flags & AI_ALL) || !got_ipv6))) | |
28977c2c | 959 | { |
1eb946b9 | 960 | gethosts (AF_INET, struct in_addr); |
afd7b703 | 961 | |
1eb946b9 | 962 | if (req->ai_family == AF_INET) |
afd7b703 | 963 | { |
1eb946b9 UD |
964 | no_inet6_data = no_data; |
965 | inet6_status = status; | |
afd7b703 | 966 | } |
28977c2c UD |
967 | } |
968 | ||
1eb946b9 UD |
969 | /* If we found one address for AF_INET or AF_INET6, |
970 | don't continue the search. */ | |
971 | if (inet6_status == NSS_STATUS_SUCCESS | |
972 | || status == NSS_STATUS_SUCCESS) | |
973 | { | |
974 | if ((req->ai_flags & AI_CANONNAME) != 0 | |
975 | && canon == NULL) | |
976 | { | |
977 | /* If we need the canonical name, get it | |
978 | from the same service as the result. */ | |
979 | nss_getcanonname_r cfct; | |
980 | int herrno; | |
981 | ||
982 | cfct = __nss_lookup_function (nip, | |
983 | "getcanonname_r"); | |
984 | if (cfct != NULL) | |
985 | { | |
986 | const size_t max_fqdn_len = 256; | |
34a9094f UD |
987 | if ((req->ai_flags & AI_CANONIDN) != 0 |
988 | && __libc_use_alloca (alloca_used | |
989 | + max_fqdn_len)) | |
990 | canonbuf = alloca_account (max_fqdn_len, | |
991 | alloca_used); | |
992 | else | |
993 | { | |
994 | canonbuf = malloc (max_fqdn_len); | |
995 | if (canonbuf == NULL) | |
996 | { | |
89f654c5 AS |
997 | _res.options |
998 | |= old_res_options & RES_USE_INET6; | |
34a9094f UD |
999 | result = -EAI_MEMORY; |
1000 | goto free_and_return; | |
1001 | } | |
1002 | malloc_canonbuf = true; | |
1003 | } | |
1eb946b9 UD |
1004 | char *s; |
1005 | ||
1006 | if (DL_CALL_FCT (cfct, (at->name ?: name, | |
34a9094f UD |
1007 | canonbuf, |
1008 | max_fqdn_len, | |
1eb946b9 UD |
1009 | &s, &rc, &herrno)) |
1010 | == NSS_STATUS_SUCCESS) | |
1011 | canon = s; | |
1012 | else | |
34a9094f UD |
1013 | { |
1014 | /* Set to name now to avoid using | |
1015 | gethostbyaddr. */ | |
1016 | if (malloc_canonbuf) | |
1017 | { | |
1018 | free (canonbuf); | |
1019 | malloc_canonbuf = false; | |
1020 | } | |
1021 | canon = name; | |
1022 | } | |
1eb946b9 UD |
1023 | } |
1024 | } | |
07f9ca32 | 1025 | status = NSS_STATUS_SUCCESS; |
1eb946b9 | 1026 | } |
7c930290 UD |
1027 | else |
1028 | { | |
1029 | /* We can have different states for AF_INET and | |
1030 | AF_INET6. Try to find a useful one for both. */ | |
1031 | if (inet6_status == NSS_STATUS_TRYAGAIN) | |
1032 | status = NSS_STATUS_TRYAGAIN; | |
1033 | else if (status == NSS_STATUS_UNAVAIL | |
1034 | && inet6_status != NSS_STATUS_UNAVAIL) | |
1035 | status = inet6_status; | |
1036 | } | |
1eb946b9 | 1037 | } |
65731753 UD |
1038 | else |
1039 | status = NSS_STATUS_UNAVAIL; | |
218d76e0 UD |
1040 | } |
1041 | ||
28977c2c UD |
1042 | if (nss_next_action (nip, status) == NSS_ACTION_RETURN) |
1043 | break; | |
1044 | ||
1045 | if (nip->next == NULL) | |
1046 | no_more = -1; | |
1047 | else | |
1048 | nip = nip->next; | |
2ce1a10f | 1049 | } |
a0bf6ac7 | 1050 | |
7ae22829 | 1051 | _res.options |= old_res_options & RES_USE_INET6; |
28977c2c | 1052 | |
cfde9b46 SP |
1053 | if (status == NSS_STATUS_UNAVAIL) |
1054 | { | |
1055 | result = GAIH_OKIFUNSPEC | -EAI_SYSTEM; | |
1056 | goto free_and_return; | |
1057 | } | |
1058 | ||
5ad81f40 | 1059 | if (no_data != 0 && no_inet6_data != 0) |
7813b61a UD |
1060 | { |
1061 | /* If both requests timed out report this. */ | |
1062 | if (no_data == EAI_AGAIN && no_inet6_data == EAI_AGAIN) | |
34a9094f UD |
1063 | result = -EAI_AGAIN; |
1064 | else | |
1065 | /* We made requests but they turned out no data. The name | |
1066 | is known, though. */ | |
1067 | result = GAIH_OKIFUNSPEC | -EAI_NODATA; | |
7813b61a | 1068 | |
34a9094f | 1069 | goto free_and_return; |
7813b61a | 1070 | } |
46ec036d | 1071 | } |
40a55d20 | 1072 | |
d19687d6 | 1073 | process_list: |
40a55d20 | 1074 | if (at->family == AF_UNSPEC) |
34a9094f UD |
1075 | { |
1076 | result = GAIH_OKIFUNSPEC | -EAI_NONAME; | |
1077 | goto free_and_return; | |
1078 | } | |
46ec036d | 1079 | } |
40a55d20 UD |
1080 | else |
1081 | { | |
7396d844 | 1082 | struct gaih_addrtuple *atr; |
34a9094f | 1083 | atr = at = alloca_account (sizeof (struct gaih_addrtuple), alloca_used); |
a0bf6ac7 | 1084 | memset (at, '\0', sizeof (struct gaih_addrtuple)); |
40a55d20 | 1085 | |
28977c2c | 1086 | if (req->ai_family == AF_UNSPEC) |
7396d844 | 1087 | { |
a0bf6ac7 UD |
1088 | at->next = __alloca (sizeof (struct gaih_addrtuple)); |
1089 | memset (at->next, '\0', sizeof (struct gaih_addrtuple)); | |
7396d844 | 1090 | } |
40a55d20 | 1091 | |
28977c2c | 1092 | if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6) |
7396d844 UD |
1093 | { |
1094 | at->family = AF_INET6; | |
1095 | if ((req->ai_flags & AI_PASSIVE) == 0) | |
a585ba22 | 1096 | memcpy (at->addr, &in6addr_loopback, sizeof (struct in6_addr)); |
7396d844 UD |
1097 | atr = at->next; |
1098 | } | |
40a55d20 | 1099 | |
28977c2c | 1100 | if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET) |
7396d844 UD |
1101 | { |
1102 | atr->family = AF_INET; | |
1103 | if ((req->ai_flags & AI_PASSIVE) == 0) | |
28977c2c | 1104 | atr->addr[0] = htonl (INADDR_LOOPBACK); |
7396d844 | 1105 | } |
46ec036d | 1106 | } |
1fb05e3d | 1107 | |
46ec036d | 1108 | { |
46ec036d UD |
1109 | struct gaih_servtuple *st2; |
1110 | struct gaih_addrtuple *at2 = at; | |
28977c2c | 1111 | size_t socklen; |
85599e53 | 1112 | sa_family_t family; |
40a55d20 | 1113 | |
f21acc89 UD |
1114 | /* |
1115 | buffer is the size of an unformatted IPv6 address in printable format. | |
1116 | */ | |
40a55d20 UD |
1117 | while (at2 != NULL) |
1118 | { | |
163288fe UD |
1119 | /* Only the first entry gets the canonical name. */ |
1120 | if (at2 == at && (req->ai_flags & AI_CANONNAME) != 0) | |
40a55d20 | 1121 | { |
34a9094f UD |
1122 | char *tmpbuf2 = NULL; |
1123 | bool malloc_tmpbuf2 = false; | |
1124 | ||
28977c2c | 1125 | if (canon == NULL) |
40a55d20 | 1126 | { |
28977c2c UD |
1127 | struct hostent *h = NULL; |
1128 | int herrno; | |
1129 | struct hostent th; | |
7b6e99be JB |
1130 | /* Add room for struct host_data. */ |
1131 | size_t tmpbuf2len = (512 + (MAX_NR_ALIASES+MAX_NR_ADDRS+1) | |
1132 | * sizeof(char*) + 16 * sizeof(char)); | |
40a55d20 | 1133 | |
28977c2c UD |
1134 | do |
1135 | { | |
34a9094f UD |
1136 | if (__libc_use_alloca (alloca_used + 2 * tmpbuf2len)) |
1137 | tmpbuf2 = extend_alloca_account (tmpbuf2, tmpbuf2len, | |
1138 | tmpbuf2len * 2, | |
1139 | alloca_used); | |
1140 | else | |
1141 | { | |
1142 | char *newp = realloc (malloc_tmpbuf2 ? tmpbuf2 : NULL, | |
1143 | 2 * tmpbuf2len); | |
1144 | if (newp == NULL) | |
1145 | { | |
1146 | if (malloc_tmpbuf2) | |
1147 | free (tmpbuf2); | |
1148 | result = -EAI_MEMORY; | |
1149 | goto free_and_return; | |
1150 | } | |
1151 | ||
1152 | tmpbuf2 = newp; | |
1153 | tmpbuf2len = 2 * tmpbuf2len; | |
1154 | malloc_tmpbuf2 = true; | |
1155 | } | |
1156 | ||
28977c2c UD |
1157 | rc = __gethostbyaddr_r (at2->addr, |
1158 | ((at2->family == AF_INET6) | |
1159 | ? sizeof (struct in6_addr) | |
1160 | : sizeof (struct in_addr)), | |
34a9094f UD |
1161 | at2->family, &th, tmpbuf2, |
1162 | tmpbuf2len, &h, &herrno); | |
28977c2c UD |
1163 | } |
1164 | while (rc == ERANGE && herrno == NETDB_INTERNAL); | |
40a55d20 | 1165 | |
28977c2c | 1166 | if (rc != 0 && herrno == NETDB_INTERNAL) |
160d067b | 1167 | { |
34a9094f UD |
1168 | if (malloc_tmpbuf2) |
1169 | free (tmpbuf2); | |
1170 | ||
28977c2c | 1171 | __set_h_errno (herrno); |
34a9094f UD |
1172 | result = -EAI_SYSTEM; |
1173 | goto free_and_return; | |
160d067b UD |
1174 | } |
1175 | ||
28977c2c UD |
1176 | if (h != NULL) |
1177 | canon = h->h_name; | |
1178 | else | |
1179 | { | |
b6c0f679 | 1180 | assert (orig_name != NULL); |
28977c2c UD |
1181 | /* If the canonical name cannot be determined, use |
1182 | the passed in string. */ | |
b6c0f679 | 1183 | canon = orig_name; |
28977c2c | 1184 | } |
160d067b | 1185 | } |
40a55d20 | 1186 | |
de079fee UD |
1187 | #ifdef HAVE_LIBIDN |
1188 | if (req->ai_flags & AI_CANONIDN) | |
1189 | { | |
3a0e90bd UD |
1190 | int idn_flags = 0; |
1191 | if (req->ai_flags & AI_IDN_ALLOW_UNASSIGNED) | |
1192 | idn_flags |= IDNA_ALLOW_UNASSIGNED; | |
1193 | if (req->ai_flags & AI_IDN_USE_STD3_ASCII_RULES) | |
1194 | idn_flags |= IDNA_USE_STD3_ASCII_RULES; | |
1195 | ||
de079fee | 1196 | char *out; |
28977c2c | 1197 | int rc = __idna_to_unicode_lzlz (canon, &out, idn_flags); |
de079fee UD |
1198 | if (rc != IDNA_SUCCESS) |
1199 | { | |
34a9094f UD |
1200 | if (malloc_tmpbuf2) |
1201 | free (tmpbuf2); | |
1202 | ||
de079fee | 1203 | if (rc == IDNA_MALLOC_ERROR) |
34a9094f UD |
1204 | result = -EAI_MEMORY; |
1205 | else if (rc == IDNA_DLOPEN_ERROR) | |
1206 | result = -EAI_SYSTEM; | |
1207 | else | |
1208 | result = -EAI_IDN_ENCODE; | |
1209 | goto free_and_return; | |
de079fee UD |
1210 | } |
1211 | /* In case the output string is the same as the input | |
91c8a74b | 1212 | string no new string has been allocated and we |
b9343764 UD |
1213 | make a copy. */ |
1214 | if (out == canon) | |
1215 | goto make_copy; | |
86e92359 | 1216 | canon = out; |
de079fee | 1217 | } |
b9343764 | 1218 | else |
de079fee | 1219 | #endif |
b9343764 UD |
1220 | { |
1221 | #ifdef HAVE_LIBIDN | |
1222 | make_copy: | |
1223 | #endif | |
34a9094f UD |
1224 | if (malloc_canonbuf) |
1225 | /* We already allocated the string using malloc. */ | |
1226 | malloc_canonbuf = false; | |
1227 | else | |
1228 | { | |
1229 | canon = strdup (canon); | |
1230 | if (canon == NULL) | |
1231 | { | |
1232 | if (malloc_tmpbuf2) | |
1233 | free (tmpbuf2); | |
1234 | ||
1235 | result = -EAI_MEMORY; | |
1236 | goto free_and_return; | |
1237 | } | |
1238 | } | |
b9343764 | 1239 | } |
34a9094f UD |
1240 | |
1241 | if (malloc_tmpbuf2) | |
1242 | free (tmpbuf2); | |
40a55d20 | 1243 | } |
40a55d20 | 1244 | |
abab6859 UD |
1245 | family = at2->family; |
1246 | if (family == AF_INET6) | |
85599e53 | 1247 | { |
85599e53 | 1248 | socklen = sizeof (struct sockaddr_in6); |
925c3c5c UD |
1249 | |
1250 | /* If we looked up IPv4 mapped address discard them here if | |
1251 | the caller isn't interested in all address and we have | |
1252 | found at least one IPv6 address. */ | |
28977c2c | 1253 | if (got_ipv6 |
925c3c5c UD |
1254 | && (req->ai_flags & (AI_V4MAPPED|AI_ALL)) == AI_V4MAPPED |
1255 | && IN6_IS_ADDR_V4MAPPED (at2->addr)) | |
1256 | goto ignore; | |
85599e53 | 1257 | } |
40a55d20 | 1258 | else |
abab6859 | 1259 | socklen = sizeof (struct sockaddr_in); |
40a55d20 UD |
1260 | |
1261 | for (st2 = st; st2 != NULL; st2 = st2->next) | |
1262 | { | |
a24c5ac4 UD |
1263 | struct addrinfo *ai; |
1264 | ai = *pai = malloc (sizeof (struct addrinfo) + socklen); | |
1265 | if (ai == NULL) | |
e7c8359e UD |
1266 | { |
1267 | free ((char *) canon); | |
34a9094f UD |
1268 | result = -EAI_MEMORY; |
1269 | goto free_and_return; | |
e7c8359e | 1270 | } |
40a55d20 | 1271 | |
a24c5ac4 UD |
1272 | ai->ai_flags = req->ai_flags; |
1273 | ai->ai_family = family; | |
1274 | ai->ai_socktype = st2->socktype; | |
1275 | ai->ai_protocol = st2->protocol; | |
1276 | ai->ai_addrlen = socklen; | |
1277 | ai->ai_addr = (void *) (ai + 1); | |
b9343764 UD |
1278 | |
1279 | /* We only add the canonical name once. */ | |
a24c5ac4 | 1280 | ai->ai_canonname = (char *) canon; |
b9343764 UD |
1281 | canon = NULL; |
1282 | ||
beb32642 | 1283 | #ifdef _HAVE_SA_LEN |
a24c5ac4 | 1284 | ai->ai_addr->sa_len = socklen; |
beb32642 | 1285 | #endif /* _HAVE_SA_LEN */ |
a24c5ac4 | 1286 | ai->ai_addr->sa_family = family; |
5a97622d | 1287 | |
e7c8359e UD |
1288 | /* In case of an allocation error the list must be NULL |
1289 | terminated. */ | |
1290 | ai->ai_next = NULL; | |
1291 | ||
85599e53 | 1292 | if (family == AF_INET6) |
40a55d20 UD |
1293 | { |
1294 | struct sockaddr_in6 *sin6p = | |
a24c5ac4 | 1295 | (struct sockaddr_in6 *) ai->ai_addr; |
46ec036d | 1296 | |
28977c2c | 1297 | sin6p->sin6_port = st2->port; |
40a55d20 UD |
1298 | sin6p->sin6_flowinfo = 0; |
1299 | memcpy (&sin6p->sin6_addr, | |
1300 | at2->addr, sizeof (struct in6_addr)); | |
c0bc5f7b | 1301 | sin6p->sin6_scope_id = at2->scopeid; |
40a55d20 UD |
1302 | } |
1303 | else | |
1304 | { | |
1305 | struct sockaddr_in *sinp = | |
a24c5ac4 | 1306 | (struct sockaddr_in *) ai->ai_addr; |
28977c2c | 1307 | sinp->sin_port = st2->port; |
40a55d20 UD |
1308 | memcpy (&sinp->sin_addr, |
1309 | at2->addr, sizeof (struct in_addr)); | |
1310 | memset (sinp->sin_zero, '\0', sizeof (sinp->sin_zero)); | |
1311 | } | |
46ec036d | 1312 | |
a24c5ac4 | 1313 | pai = &(ai->ai_next); |
40a55d20 | 1314 | } |
46ec036d | 1315 | |
01abbc0f UD |
1316 | ++*naddrs; |
1317 | ||
925c3c5c | 1318 | ignore: |
40a55d20 UD |
1319 | at2 = at2->next; |
1320 | } | |
46ec036d | 1321 | } |
34a9094f UD |
1322 | |
1323 | free_and_return: | |
1324 | if (malloc_name) | |
1325 | free ((char *) name); | |
1326 | if (malloc_addrmem) | |
1327 | free (addrmem); | |
1328 | if (malloc_canonbuf) | |
1329 | free (canonbuf); | |
1330 | if (malloc_tmpbuf) | |
1331 | free (tmpbuf); | |
1332 | ||
1333 | return result; | |
46ec036d UD |
1334 | } |
1335 | ||
46ec036d | 1336 | |
5ddb5bf5 UD |
1337 | struct sort_result |
1338 | { | |
1339 | struct addrinfo *dest_addr; | |
0efd1956 UD |
1340 | /* Using sockaddr_storage is for now overkill. We only support IPv4 |
1341 | and IPv6 so far. If this changes at some point we can adjust the | |
1342 | type here. */ | |
1343 | struct sockaddr_in6 source_addr; | |
d19687d6 | 1344 | uint8_t source_addr_len; |
5ddb5bf5 | 1345 | bool got_source_addr; |
3af48b5b | 1346 | uint8_t source_addr_flags; |
6f3914d5 | 1347 | uint8_t prefixlen; |
773e79b3 UD |
1348 | uint32_t index; |
1349 | int32_t native; | |
1350 | }; | |
1351 | ||
1352 | struct sort_result_combo | |
1353 | { | |
1354 | struct sort_result *results; | |
1355 | int nresults; | |
5ddb5bf5 UD |
1356 | }; |
1357 | ||
1358 | ||
ee72b971 UD |
1359 | #if __BYTE_ORDER == __BIG_ENDIAN |
1360 | # define htonl_c(n) n | |
1361 | #else | |
1362 | # define htonl_c(n) __bswap_constant_32 (n) | |
1363 | #endif | |
1364 | ||
1365 | static const struct scopeentry | |
1366 | { | |
1367 | union | |
1368 | { | |
1369 | char addr[4]; | |
1370 | uint32_t addr32; | |
1371 | }; | |
1372 | uint32_t netmask; | |
1373 | int32_t scope; | |
1374 | } default_scopes[] = | |
1375 | { | |
1376 | /* Link-local addresses: scope 2. */ | |
1377 | { { { 169, 254, 0, 0 } }, htonl_c (0xffff0000), 2 }, | |
1378 | { { { 127, 0, 0, 0 } }, htonl_c (0xff000000), 2 }, | |
ee72b971 UD |
1379 | /* Default: scope 14. */ |
1380 | { { { 0, 0, 0, 0 } }, htonl_c (0x00000000), 14 } | |
1381 | }; | |
1382 | ||
1383 | /* The label table. */ | |
1384 | static const struct scopeentry *scopes; | |
1385 | ||
1386 | ||
5ddb5bf5 | 1387 | static int |
0efd1956 | 1388 | get_scope (const struct sockaddr_in6 *in6) |
5ddb5bf5 UD |
1389 | { |
1390 | int scope; | |
0efd1956 | 1391 | if (in6->sin6_family == PF_INET6) |
5ddb5bf5 | 1392 | { |
5ddb5bf5 UD |
1393 | if (! IN6_IS_ADDR_MULTICAST (&in6->sin6_addr)) |
1394 | { | |
5fab5544 UD |
1395 | if (IN6_IS_ADDR_LINKLOCAL (&in6->sin6_addr) |
1396 | /* RFC 4291 2.5.3 says that the loopback address is to be | |
1397 | treated like a link-local address. */ | |
1398 | || IN6_IS_ADDR_LOOPBACK (&in6->sin6_addr)) | |
5ddb5bf5 UD |
1399 | scope = 2; |
1400 | else if (IN6_IS_ADDR_SITELOCAL (&in6->sin6_addr)) | |
1401 | scope = 5; | |
1402 | else | |
1403 | /* XXX Is this the correct default behavior? */ | |
1404 | scope = 14; | |
1405 | } | |
1406 | else | |
1407 | scope = in6->sin6_addr.s6_addr[1] & 0xf; | |
1408 | } | |
0efd1956 | 1409 | else if (in6->sin6_family == PF_INET) |
5ddb5bf5 | 1410 | { |
0efd1956 | 1411 | const struct sockaddr_in *in = (const struct sockaddr_in *) in6; |
ee72b971 UD |
1412 | |
1413 | size_t cnt = 0; | |
1414 | while (1) | |
1415 | { | |
1416 | if ((in->sin_addr.s_addr & scopes[cnt].netmask) | |
1417 | == scopes[cnt].addr32) | |
1418 | return scopes[cnt].scope; | |
1419 | ||
1420 | ++cnt; | |
1421 | } | |
1422 | /* NOTREACHED */ | |
5ddb5bf5 UD |
1423 | } |
1424 | else | |
1425 | /* XXX What is a good default? */ | |
1426 | scope = 15; | |
1427 | ||
1428 | return scope; | |
1429 | } | |
1430 | ||
1431 | ||
77dd4c3b | 1432 | struct prefixentry |
5ddb5bf5 UD |
1433 | { |
1434 | struct in6_addr prefix; | |
1435 | unsigned int bits; | |
1436 | int val; | |
77dd4c3b UD |
1437 | }; |
1438 | ||
1439 | ||
1440 | /* The label table. */ | |
1441 | static const struct prefixentry *labels; | |
1442 | ||
1443 | /* Default labels. */ | |
1444 | static const struct prefixentry default_labels[] = | |
5ddb5bf5 UD |
1445 | { |
1446 | /* See RFC 3484 for the details. */ | |
6107639e UD |
1447 | { { .__in6_u |
1448 | = { .__u6_addr8 = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1449 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 } } | |
1450 | }, 128, 0 }, | |
1451 | { { .__in6_u | |
1452 | = { .__u6_addr8 = { 0x20, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1453 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } | |
1454 | }, 16, 2 }, | |
1455 | { { .__in6_u | |
1456 | = { .__u6_addr8 = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1457 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } | |
1458 | }, 96, 3 }, | |
1459 | { { .__in6_u | |
1460 | = { .__u6_addr8 = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1461 | 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 } } | |
1462 | }, 96, 4 }, | |
6e2a7825 UD |
1463 | /* The next two entries differ from RFC 3484. We need to treat |
1464 | IPv6 site-local addresses special because they are never NATed, | |
1465 | unlike site-locale IPv4 addresses. If this would not happen, on | |
1466 | machines which have only IPv4 and IPv6 site-local addresses, the | |
1467 | sorting would prefer the IPv6 site-local addresses, causing | |
1468 | unnecessary delays when trying to connect to a global IPv6 address | |
1469 | through a site-local IPv6 address. */ | |
6107639e UD |
1470 | { { .__in6_u |
1471 | = { .__u6_addr8 = { 0xfe, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1472 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } | |
1473 | }, 10, 5 }, | |
1474 | { { .__in6_u | |
1475 | = { .__u6_addr8 = { 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1476 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } | |
1477 | }, 7, 6 }, | |
f4a79765 | 1478 | /* Additional rule for Teredo tunnels. */ |
6107639e UD |
1479 | { { .__in6_u |
1480 | = { .__u6_addr8 = { 0x20, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1481 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } | |
1482 | }, 32, 7 }, | |
1483 | { { .__in6_u | |
1484 | = { .__u6_addr8 = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1485 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } | |
1486 | }, 0, 1 } | |
5ddb5bf5 UD |
1487 | }; |
1488 | ||
1489 | ||
77dd4c3b UD |
1490 | /* The precedence table. */ |
1491 | static const struct prefixentry *precedence; | |
1492 | ||
1493 | /* The default precedences. */ | |
1494 | static const struct prefixentry default_precedence[] = | |
5ddb5bf5 UD |
1495 | { |
1496 | /* See RFC 3484 for the details. */ | |
6107639e UD |
1497 | { { .__in6_u |
1498 | = { .__u6_addr8 = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1499 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 } } | |
1500 | }, 128, 50 }, | |
1501 | { { .__in6_u | |
1502 | = { .__u6_addr8 = { 0x20, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1503 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } | |
1504 | }, 16, 30 }, | |
1505 | { { .__in6_u | |
1506 | = { .__u6_addr8 = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1507 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } | |
1508 | }, 96, 20 }, | |
1509 | { { .__in6_u | |
1510 | = { .__u6_addr8 = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1511 | 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00 } } | |
1512 | }, 96, 10 }, | |
1513 | { { .__in6_u | |
1514 | = { .__u6_addr8 = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
1515 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } } | |
1516 | }, 0, 40 } | |
5ddb5bf5 UD |
1517 | }; |
1518 | ||
1519 | ||
1520 | static int | |
0efd1956 | 1521 | match_prefix (const struct sockaddr_in6 *in6, |
77dd4c3b | 1522 | const struct prefixentry *list, int default_val) |
5ddb5bf5 UD |
1523 | { |
1524 | int idx; | |
1525 | struct sockaddr_in6 in6_mem; | |
5ddb5bf5 | 1526 | |
0efd1956 | 1527 | if (in6->sin6_family == PF_INET) |
5ddb5bf5 | 1528 | { |
0efd1956 | 1529 | const struct sockaddr_in *in = (const struct sockaddr_in *) in6; |
5ddb5bf5 | 1530 | |
5846c4e2 | 1531 | /* Construct a V4-to-6 mapped address. */ |
5ddb5bf5 UD |
1532 | in6_mem.sin6_family = PF_INET6; |
1533 | in6_mem.sin6_port = in->sin_port; | |
1534 | in6_mem.sin6_flowinfo = 0; | |
5846c4e2 UD |
1535 | memset (&in6_mem.sin6_addr, '\0', sizeof (in6_mem.sin6_addr)); |
1536 | in6_mem.sin6_addr.s6_addr16[5] = 0xffff; | |
1537 | in6_mem.sin6_addr.s6_addr32[3] = in->sin_addr.s_addr; | |
1538 | in6_mem.sin6_scope_id = 0; | |
5ddb5bf5 UD |
1539 | |
1540 | in6 = &in6_mem; | |
1541 | } | |
0efd1956 | 1542 | else if (in6->sin6_family != PF_INET6) |
5ddb5bf5 UD |
1543 | return default_val; |
1544 | ||
1545 | for (idx = 0; ; ++idx) | |
1546 | { | |
1547 | unsigned int bits = list[idx].bits; | |
d4ed7561 UD |
1548 | const uint8_t *mask = list[idx].prefix.s6_addr; |
1549 | const uint8_t *val = in6->sin6_addr.s6_addr; | |
5ddb5bf5 | 1550 | |
207cce4c | 1551 | while (bits >= 8) |
5ddb5bf5 UD |
1552 | { |
1553 | if (*mask != *val) | |
1554 | break; | |
1555 | ||
1556 | ++mask; | |
1557 | ++val; | |
1558 | bits -= 8; | |
1559 | } | |
1560 | ||
1561 | if (bits < 8) | |
1562 | { | |
d9a3ae7f | 1563 | if ((*mask & (0xff00 >> bits)) == (*val & (0xff00 >> bits))) |
5ddb5bf5 UD |
1564 | /* Match! */ |
1565 | break; | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | return list[idx].val; | |
1570 | } | |
1571 | ||
1572 | ||
1573 | static int | |
0efd1956 | 1574 | get_label (const struct sockaddr_in6 *in6) |
5ddb5bf5 UD |
1575 | { |
1576 | /* XXX What is a good default value? */ | |
0efd1956 | 1577 | return match_prefix (in6, labels, INT_MAX); |
5ddb5bf5 UD |
1578 | } |
1579 | ||
1580 | ||
1581 | static int | |
0efd1956 | 1582 | get_precedence (const struct sockaddr_in6 *in6) |
5ddb5bf5 UD |
1583 | { |
1584 | /* XXX What is a good default value? */ | |
0efd1956 | 1585 | return match_prefix (in6, precedence, 0); |
5ddb5bf5 UD |
1586 | } |
1587 | ||
1588 | ||
c6bad06a UD |
1589 | /* Find last bit set in a word. */ |
1590 | static int | |
1591 | fls (uint32_t a) | |
1592 | { | |
1593 | uint32_t mask; | |
6f3914d5 | 1594 | int n; |
c6bad06a UD |
1595 | for (n = 0, mask = 1 << 31; n < 32; mask >>= 1, ++n) |
1596 | if ((a & mask) != 0) | |
1597 | break; | |
1598 | return n; | |
1599 | } | |
1600 | ||
1601 | ||
5ddb5bf5 | 1602 | static int |
773e79b3 | 1603 | rfc3484_sort (const void *p1, const void *p2, void *arg) |
5ddb5bf5 | 1604 | { |
0efd1956 UD |
1605 | const size_t idx1 = *(const size_t *) p1; |
1606 | const size_t idx2 = *(const size_t *) p2; | |
773e79b3 | 1607 | struct sort_result_combo *src = (struct sort_result_combo *) arg; |
0efd1956 UD |
1608 | struct sort_result *a1 = &src->results[idx1]; |
1609 | struct sort_result *a2 = &src->results[idx2]; | |
5ddb5bf5 UD |
1610 | |
1611 | /* Rule 1: Avoid unusable destinations. | |
1612 | We have the got_source_addr flag set if the destination is reachable. */ | |
1613 | if (a1->got_source_addr && ! a2->got_source_addr) | |
1614 | return -1; | |
1615 | if (! a1->got_source_addr && a2->got_source_addr) | |
1616 | return 1; | |
1617 | ||
1618 | ||
1619 | /* Rule 2: Prefer matching scope. Only interesting if both | |
1620 | destination addresses are IPv6. */ | |
1621 | int a1_dst_scope | |
0efd1956 | 1622 | = get_scope ((struct sockaddr_in6 *) a1->dest_addr->ai_addr); |
5ddb5bf5 UD |
1623 | |
1624 | int a2_dst_scope | |
0efd1956 | 1625 | = get_scope ((struct sockaddr_in6 *) a2->dest_addr->ai_addr); |
5ddb5bf5 UD |
1626 | |
1627 | if (a1->got_source_addr) | |
1628 | { | |
1629 | int a1_src_scope = get_scope (&a1->source_addr); | |
1630 | int a2_src_scope = get_scope (&a2->source_addr); | |
1631 | ||
1632 | if (a1_dst_scope == a1_src_scope && a2_dst_scope != a2_src_scope) | |
1633 | return -1; | |
1634 | if (a1_dst_scope != a1_src_scope && a2_dst_scope == a2_src_scope) | |
1635 | return 1; | |
1636 | } | |
1637 | ||
1638 | ||
3af48b5b UD |
1639 | /* Rule 3: Avoid deprecated addresses. */ |
1640 | if (a1->got_source_addr) | |
1641 | { | |
1642 | if (!(a1->source_addr_flags & in6ai_deprecated) | |
1643 | && (a2->source_addr_flags & in6ai_deprecated)) | |
1644 | return -1; | |
1645 | if ((a1->source_addr_flags & in6ai_deprecated) | |
1646 | && !(a2->source_addr_flags & in6ai_deprecated)) | |
1647 | return 1; | |
1648 | } | |
5ddb5bf5 | 1649 | |
457b559e UD |
1650 | /* Rule 4: Prefer home addresses. */ |
1651 | if (a1->got_source_addr) | |
1652 | { | |
1653 | if (!(a1->source_addr_flags & in6ai_homeaddress) | |
1654 | && (a2->source_addr_flags & in6ai_homeaddress)) | |
4a85a8ee | 1655 | return 1; |
457b559e UD |
1656 | if ((a1->source_addr_flags & in6ai_homeaddress) |
1657 | && !(a2->source_addr_flags & in6ai_homeaddress)) | |
4a85a8ee | 1658 | return -1; |
457b559e | 1659 | } |
5ddb5bf5 UD |
1660 | |
1661 | /* Rule 5: Prefer matching label. */ | |
1662 | if (a1->got_source_addr) | |
1663 | { | |
1664 | int a1_dst_label | |
0efd1956 | 1665 | = get_label ((struct sockaddr_in6 *) a1->dest_addr->ai_addr); |
5ddb5bf5 UD |
1666 | int a1_src_label = get_label (&a1->source_addr); |
1667 | ||
1668 | int a2_dst_label | |
0efd1956 | 1669 | = get_label ((struct sockaddr_in6 *) a2->dest_addr->ai_addr); |
5ddb5bf5 UD |
1670 | int a2_src_label = get_label (&a2->source_addr); |
1671 | ||
1672 | if (a1_dst_label == a1_src_label && a2_dst_label != a2_src_label) | |
1673 | return -1; | |
1674 | if (a1_dst_label != a1_src_label && a2_dst_label == a2_src_label) | |
1675 | return 1; | |
1676 | } | |
1677 | ||
1678 | ||
1679 | /* Rule 6: Prefer higher precedence. */ | |
1680 | int a1_prec | |
0efd1956 | 1681 | = get_precedence ((struct sockaddr_in6 *) a1->dest_addr->ai_addr); |
5ddb5bf5 | 1682 | int a2_prec |
0efd1956 | 1683 | = get_precedence ((struct sockaddr_in6 *) a2->dest_addr->ai_addr); |
5ddb5bf5 UD |
1684 | |
1685 | if (a1_prec > a2_prec) | |
1686 | return -1; | |
1687 | if (a1_prec < a2_prec) | |
1688 | return 1; | |
1689 | ||
1690 | ||
3af48b5b UD |
1691 | /* Rule 7: Prefer native transport. */ |
1692 | if (a1->got_source_addr) | |
1693 | { | |
773e79b3 UD |
1694 | /* The same interface index means the same interface which means |
1695 | there is no difference in transport. This should catch many | |
1696 | (most?) cases. */ | |
1697 | if (a1->index != a2->index) | |
1698 | { | |
49029a66 UD |
1699 | int a1_native = a1->native; |
1700 | int a2_native = a2->native; | |
1701 | ||
1702 | if (a1_native == -1 || a2_native == -1) | |
773e79b3 | 1703 | { |
49029a66 UD |
1704 | uint32_t a1_index; |
1705 | if (a1_native == -1) | |
1706 | { | |
1707 | /* If we do not have the information use 'native' as | |
1708 | the default. */ | |
1709 | a1_native = 0; | |
1710 | a1_index = a1->index; | |
1711 | } | |
1712 | else | |
1713 | a1_index = 0xffffffffu; | |
1714 | ||
1715 | uint32_t a2_index; | |
1716 | if (a2_native == -1) | |
1717 | { | |
1718 | /* If we do not have the information use 'native' as | |
1719 | the default. */ | |
1720 | a2_native = 0; | |
1721 | a2_index = a2->index; | |
1722 | } | |
1723 | else | |
1724 | a2_index = 0xffffffffu; | |
1725 | ||
1726 | __check_native (a1_index, &a1_native, a2_index, &a2_native); | |
773e79b3 UD |
1727 | |
1728 | /* Fill in the results in all the records. */ | |
1729 | for (int i = 0; i < src->nresults; ++i) | |
49029a66 UD |
1730 | if (src->results[i].index == a1_index) |
1731 | { | |
1732 | assert (src->results[i].native == -1 | |
1733 | || src->results[i].native == a1_native); | |
773e79b3 | 1734 | src->results[i].native = a1_native; |
49029a66 UD |
1735 | } |
1736 | else if (src->results[i].index == a2_index) | |
1737 | { | |
1738 | assert (src->results[i].native == -1 | |
1739 | || src->results[i].native == a2_native); | |
773e79b3 | 1740 | src->results[i].native = a2_native; |
49029a66 | 1741 | } |
773e79b3 | 1742 | } |
3af48b5b | 1743 | |
49029a66 | 1744 | if (a1_native && !a2_native) |
773e79b3 | 1745 | return -1; |
49029a66 | 1746 | if (!a1_native && a2_native) |
773e79b3 UD |
1747 | return 1; |
1748 | } | |
3af48b5b | 1749 | } |
5ddb5bf5 UD |
1750 | |
1751 | ||
1752 | /* Rule 8: Prefer smaller scope. */ | |
1753 | if (a1_dst_scope < a2_dst_scope) | |
1754 | return -1; | |
1755 | if (a1_dst_scope > a2_dst_scope) | |
1756 | return 1; | |
1757 | ||
1758 | ||
1759 | /* Rule 9: Use longest matching prefix. */ | |
1760 | if (a1->got_source_addr | |
1761 | && a1->dest_addr->ai_family == a2->dest_addr->ai_family) | |
1762 | { | |
1763 | int bit1 = 0; | |
1764 | int bit2 = 0; | |
1765 | ||
1766 | if (a1->dest_addr->ai_family == PF_INET) | |
1767 | { | |
0efd1956 UD |
1768 | assert (a1->source_addr.sin6_family == PF_INET); |
1769 | assert (a2->source_addr.sin6_family == PF_INET); | |
5ddb5bf5 | 1770 | |
6f3914d5 UD |
1771 | /* Outside of subnets, as defined by the network masks, |
1772 | common address prefixes for IPv4 addresses make no sense. | |
1773 | So, define a non-zero value only if source and | |
1774 | destination address are on the same subnet. */ | |
1775 | struct sockaddr_in *in1_dst | |
1776 | = (struct sockaddr_in *) a1->dest_addr->ai_addr; | |
1777 | in_addr_t in1_dst_addr = ntohl (in1_dst->sin_addr.s_addr); | |
1778 | struct sockaddr_in *in1_src | |
1779 | = (struct sockaddr_in *) &a1->source_addr; | |
1780 | in_addr_t in1_src_addr = ntohl (in1_src->sin_addr.s_addr); | |
1781 | in_addr_t netmask1 = 0xffffffffu << (32 - a1->prefixlen); | |
1782 | ||
1783 | if ((in1_src_addr & netmask1) == (in1_dst_addr & netmask1)) | |
1784 | bit1 = fls (in1_dst_addr ^ in1_src_addr); | |
1785 | ||
1786 | struct sockaddr_in *in2_dst | |
1787 | = (struct sockaddr_in *) a2->dest_addr->ai_addr; | |
1788 | in_addr_t in2_dst_addr = ntohl (in2_dst->sin_addr.s_addr); | |
1789 | struct sockaddr_in *in2_src | |
1790 | = (struct sockaddr_in *) &a2->source_addr; | |
1791 | in_addr_t in2_src_addr = ntohl (in2_src->sin_addr.s_addr); | |
1792 | in_addr_t netmask2 = 0xffffffffu << (32 - a2->prefixlen); | |
1793 | ||
1794 | if ((in2_src_addr & netmask2) == (in2_dst_addr & netmask2)) | |
1795 | bit2 = fls (in2_dst_addr ^ in2_src_addr); | |
5ddb5bf5 UD |
1796 | } |
1797 | else if (a1->dest_addr->ai_family == PF_INET6) | |
1798 | { | |
0efd1956 UD |
1799 | assert (a1->source_addr.sin6_family == PF_INET6); |
1800 | assert (a2->source_addr.sin6_family == PF_INET6); | |
5ddb5bf5 UD |
1801 | |
1802 | struct sockaddr_in6 *in1_dst; | |
1803 | struct sockaddr_in6 *in1_src; | |
1804 | struct sockaddr_in6 *in2_dst; | |
1805 | struct sockaddr_in6 *in2_src; | |
1806 | ||
1807 | in1_dst = (struct sockaddr_in6 *) a1->dest_addr->ai_addr; | |
1808 | in1_src = (struct sockaddr_in6 *) &a1->source_addr; | |
1809 | in2_dst = (struct sockaddr_in6 *) a2->dest_addr->ai_addr; | |
1810 | in2_src = (struct sockaddr_in6 *) &a2->source_addr; | |
1811 | ||
1812 | int i; | |
1813 | for (i = 0; i < 4; ++i) | |
1814 | if (in1_dst->sin6_addr.s6_addr32[i] | |
1815 | != in1_src->sin6_addr.s6_addr32[i] | |
1816 | || (in2_dst->sin6_addr.s6_addr32[i] | |
1817 | != in2_src->sin6_addr.s6_addr32[i])) | |
1818 | break; | |
1819 | ||
1820 | if (i < 4) | |
1821 | { | |
c6bad06a UD |
1822 | bit1 = fls (ntohl (in1_dst->sin6_addr.s6_addr32[i] |
1823 | ^ in1_src->sin6_addr.s6_addr32[i])); | |
1824 | bit2 = fls (ntohl (in2_dst->sin6_addr.s6_addr32[i] | |
1825 | ^ in2_src->sin6_addr.s6_addr32[i])); | |
5ddb5bf5 UD |
1826 | } |
1827 | } | |
1828 | ||
1829 | if (bit1 > bit2) | |
1830 | return -1; | |
1831 | if (bit1 < bit2) | |
1832 | return 1; | |
1833 | } | |
1834 | ||
1835 | ||
6f55ed88 UD |
1836 | /* Rule 10: Otherwise, leave the order unchanged. To ensure this |
1837 | compare with the value indicating the order in which the entries | |
1838 | have been received from the services. NB: no two entries can have | |
1839 | the same order so the test will never return zero. */ | |
0efd1956 | 1840 | return idx1 < idx2 ? -1 : 1; |
5ddb5bf5 UD |
1841 | } |
1842 | ||
1843 | ||
3af48b5b UD |
1844 | static int |
1845 | in6aicmp (const void *p1, const void *p2) | |
1846 | { | |
1847 | struct in6addrinfo *a1 = (struct in6addrinfo *) p1; | |
1848 | struct in6addrinfo *a2 = (struct in6addrinfo *) p2; | |
1849 | ||
1850 | return memcmp (a1->addr, a2->addr, sizeof (a1->addr)); | |
1851 | } | |
1852 | ||
1853 | ||
77dd4c3b UD |
1854 | /* Name of the config file for RFC 3484 sorting (for now). */ |
1855 | #define GAICONF_FNAME "/etc/gai.conf" | |
1856 | ||
1857 | ||
fc4837e5 | 1858 | /* Non-zero if we are supposed to reload the config file automatically |
77dd4c3b UD |
1859 | whenever it changed. */ |
1860 | static int gaiconf_reload_flag; | |
1861 | ||
fc4837e5 UD |
1862 | /* Non-zero if gaiconf_reload_flag was ever set to true. */ |
1863 | static int gaiconf_reload_flag_ever_set; | |
1864 | ||
77dd4c3b | 1865 | /* Last modification time. */ |
a0844057 RM |
1866 | #ifdef _STATBUF_ST_NSEC |
1867 | ||
77dd4c3b UD |
1868 | static struct timespec gaiconf_mtime; |
1869 | ||
a0844057 RM |
1870 | static inline void |
1871 | save_gaiconf_mtime (const struct stat64 *st) | |
1872 | { | |
1873 | gaiconf_mtime = st->st_mtim; | |
1874 | } | |
1875 | ||
1876 | static inline bool | |
1877 | check_gaiconf_mtime (const struct stat64 *st) | |
1878 | { | |
1879 | return (st->st_mtim.tv_sec == gaiconf_mtime.tv_sec | |
1880 | && st->st_mtim.tv_nsec == gaiconf_mtime.tv_nsec); | |
1881 | } | |
1882 | ||
1883 | #else | |
1884 | ||
1885 | static time_t gaiconf_mtime; | |
1886 | ||
1887 | static inline void | |
1888 | save_gaiconf_mtime (const struct stat64 *st) | |
1889 | { | |
1890 | gaiconf_mtime = st->st_mtime; | |
1891 | } | |
1892 | ||
1893 | static inline bool | |
1894 | check_gaiconf_mtime (const struct stat64 *st) | |
1895 | { | |
fbc723bb | 1896 | return st->st_mtime == gaiconf_mtime; |
a0844057 RM |
1897 | } |
1898 | ||
1899 | #endif | |
1900 | ||
77dd4c3b UD |
1901 | |
1902 | libc_freeres_fn(fini) | |
1903 | { | |
1904 | if (labels != default_labels) | |
1905 | { | |
1906 | const struct prefixentry *old = labels; | |
1907 | labels = default_labels; | |
1908 | free ((void *) old); | |
1909 | } | |
1910 | ||
1911 | if (precedence != default_precedence) | |
1912 | { | |
1913 | const struct prefixentry *old = precedence; | |
1914 | precedence = default_precedence; | |
1915 | free ((void *) old); | |
1916 | } | |
ee72b971 UD |
1917 | |
1918 | if (scopes != default_scopes) | |
1919 | { | |
1920 | const struct scopeentry *old = scopes; | |
1921 | scopes = default_scopes; | |
1922 | free ((void *) old); | |
1923 | } | |
77dd4c3b UD |
1924 | } |
1925 | ||
1926 | ||
1927 | struct prefixlist | |
1928 | { | |
1929 | struct prefixentry entry; | |
1930 | struct prefixlist *next; | |
1931 | }; | |
1932 | ||
1933 | ||
ee72b971 UD |
1934 | struct scopelist |
1935 | { | |
1936 | struct scopeentry entry; | |
1937 | struct scopelist *next; | |
1938 | }; | |
1939 | ||
1940 | ||
77dd4c3b UD |
1941 | static void |
1942 | free_prefixlist (struct prefixlist *list) | |
1943 | { | |
1944 | while (list != NULL) | |
1945 | { | |
1946 | struct prefixlist *oldp = list; | |
1947 | list = list->next; | |
1948 | free (oldp); | |
1949 | } | |
1950 | } | |
1951 | ||
1952 | ||
ee72b971 UD |
1953 | static void |
1954 | free_scopelist (struct scopelist *list) | |
1955 | { | |
1956 | while (list != NULL) | |
1957 | { | |
1958 | struct scopelist *oldp = list; | |
1959 | list = list->next; | |
1960 | free (oldp); | |
1961 | } | |
1962 | } | |
1963 | ||
1964 | ||
77dd4c3b UD |
1965 | static int |
1966 | prefixcmp (const void *p1, const void *p2) | |
1967 | { | |
1968 | const struct prefixentry *e1 = (const struct prefixentry *) p1; | |
1969 | const struct prefixentry *e2 = (const struct prefixentry *) p2; | |
1970 | ||
1971 | if (e1->bits < e2->bits) | |
1972 | return 1; | |
1973 | if (e1->bits == e2->bits) | |
1974 | return 0; | |
1975 | return -1; | |
1976 | } | |
1977 | ||
1978 | ||
ee72b971 UD |
1979 | static int |
1980 | scopecmp (const void *p1, const void *p2) | |
1981 | { | |
1982 | const struct scopeentry *e1 = (const struct scopeentry *) p1; | |
1983 | const struct scopeentry *e2 = (const struct scopeentry *) p2; | |
1984 | ||
1985 | if (e1->netmask > e2->netmask) | |
1986 | return -1; | |
1987 | if (e1->netmask == e2->netmask) | |
1988 | return 0; | |
1989 | return 1; | |
1990 | } | |
1991 | ||
1992 | ||
77dd4c3b UD |
1993 | static void |
1994 | gaiconf_init (void) | |
1995 | { | |
1996 | struct prefixlist *labellist = NULL; | |
1997 | size_t nlabellist = 0; | |
1998 | bool labellist_nullbits = false; | |
1999 | struct prefixlist *precedencelist = NULL; | |
2000 | size_t nprecedencelist = 0; | |
2001 | bool precedencelist_nullbits = false; | |
ee72b971 UD |
2002 | struct scopelist *scopelist = NULL; |
2003 | size_t nscopelist = 0; | |
2004 | bool scopelist_nullbits = false; | |
77dd4c3b | 2005 | |
312be3f9 | 2006 | FILE *fp = fopen (GAICONF_FNAME, "rce"); |
77dd4c3b UD |
2007 | if (fp != NULL) |
2008 | { | |
2009 | struct stat64 st; | |
2010 | if (__fxstat64 (_STAT_VER, fileno (fp), &st) != 0) | |
2011 | { | |
2012 | fclose (fp); | |
2013 | goto no_file; | |
2014 | } | |
2015 | ||
2016 | char *line = NULL; | |
2017 | size_t linelen = 0; | |
2018 | ||
2019 | __fsetlocking (fp, FSETLOCKING_BYCALLER); | |
2020 | ||
2021 | while (!feof_unlocked (fp)) | |
2022 | { | |
2023 | ssize_t n = __getline (&line, &linelen, fp); | |
2024 | if (n <= 0) | |
2025 | break; | |
2026 | ||
2027 | /* Handle comments. No escaping possible so this is easy. */ | |
2028 | char *cp = strchr (line, '#'); | |
2029 | if (cp != NULL) | |
2030 | *cp = '\0'; | |
2031 | ||
2032 | cp = line; | |
2033 | while (isspace (*cp)) | |
2034 | ++cp; | |
2035 | ||
2036 | char *cmd = cp; | |
2037 | while (*cp != '\0' && !isspace (*cp)) | |
2038 | ++cp; | |
2039 | size_t cmdlen = cp - cmd; | |
2040 | ||
2041 | if (*cp != '\0') | |
2042 | *cp++ = '\0'; | |
2043 | while (isspace (*cp)) | |
2044 | ++cp; | |
2045 | ||
2046 | char *val1 = cp; | |
2047 | while (*cp != '\0' && !isspace (*cp)) | |
2048 | ++cp; | |
2049 | size_t val1len = cp - cmd; | |
2050 | ||
2051 | /* We always need at least two values. */ | |
2052 | if (val1len == 0) | |
2053 | continue; | |
2054 | ||
2055 | if (*cp != '\0') | |
2056 | *cp++ = '\0'; | |
2057 | while (isspace (*cp)) | |
2058 | ++cp; | |
2059 | ||
2060 | char *val2 = cp; | |
2061 | while (*cp != '\0' && !isspace (*cp)) | |
2062 | ++cp; | |
2063 | ||
2064 | /* Ignore the rest of the line. */ | |
2065 | *cp = '\0'; | |
2066 | ||
2067 | struct prefixlist **listp; | |
2068 | size_t *lenp; | |
2069 | bool *nullbitsp; | |
2070 | switch (cmdlen) | |
2071 | { | |
2072 | case 5: | |
2073 | if (strcmp (cmd, "label") == 0) | |
2074 | { | |
2075 | struct in6_addr prefix; | |
ecc68568 | 2076 | unsigned long int bits; |
77dd4c3b UD |
2077 | unsigned long int val; |
2078 | char *endp; | |
2079 | ||
2080 | listp = &labellist; | |
2081 | lenp = &nlabellist; | |
2082 | nullbitsp = &labellist_nullbits; | |
2083 | ||
2084 | new_elem: | |
ecc68568 | 2085 | bits = 128; |
77dd4c3b UD |
2086 | __set_errno (0); |
2087 | cp = strchr (val1, '/'); | |
2088 | if (cp != NULL) | |
2089 | *cp++ = '\0'; | |
2090 | if (inet_pton (AF_INET6, val1, &prefix) | |
2091 | && (cp == NULL | |
2092 | || (bits = strtoul (cp, &endp, 10)) != ULONG_MAX | |
2093 | || errno != ERANGE) | |
2094 | && *endp == '\0' | |
ee72b971 | 2095 | && bits <= 128 |
77dd4c3b UD |
2096 | && ((val = strtoul (val2, &endp, 10)) != ULONG_MAX |
2097 | || errno != ERANGE) | |
2098 | && *endp == '\0' | |
2099 | && val <= INT_MAX) | |
2100 | { | |
2101 | struct prefixlist *newp = malloc (sizeof (*newp)); | |
2102 | if (newp == NULL) | |
2103 | { | |
2104 | free (line); | |
2105 | fclose (fp); | |
2106 | goto no_file; | |
2107 | } | |
2108 | ||
2109 | memcpy (&newp->entry.prefix, &prefix, sizeof (prefix)); | |
2110 | newp->entry.bits = bits; | |
2111 | newp->entry.val = val; | |
2112 | newp->next = *listp; | |
2113 | *listp = newp; | |
2114 | ++*lenp; | |
2115 | *nullbitsp |= bits == 0; | |
2116 | } | |
2117 | } | |
2118 | break; | |
2119 | ||
2120 | case 6: | |
2121 | if (strcmp (cmd, "reload") == 0) | |
fc4837e5 UD |
2122 | { |
2123 | gaiconf_reload_flag = strcmp (val1, "yes") == 0; | |
2124 | if (gaiconf_reload_flag) | |
2125 | gaiconf_reload_flag_ever_set = 1; | |
2126 | } | |
77dd4c3b UD |
2127 | break; |
2128 | ||
ee72b971 UD |
2129 | case 7: |
2130 | if (strcmp (cmd, "scopev4") == 0) | |
2131 | { | |
2132 | struct in6_addr prefix; | |
2133 | unsigned long int bits; | |
2134 | unsigned long int val; | |
2135 | char *endp; | |
2136 | ||
2137 | bits = 32; | |
2138 | __set_errno (0); | |
2139 | cp = strchr (val1, '/'); | |
2140 | if (cp != NULL) | |
2141 | *cp++ = '\0'; | |
2142 | if (inet_pton (AF_INET6, val1, &prefix)) | |
2143 | { | |
fde15fdc | 2144 | bits = 128; |
ee72b971 UD |
2145 | if (IN6_IS_ADDR_V4MAPPED (&prefix) |
2146 | && (cp == NULL | |
2147 | || (bits = strtoul (cp, &endp, 10)) != ULONG_MAX | |
2148 | || errno != ERANGE) | |
2149 | && *endp == '\0' | |
2150 | && bits >= 96 | |
2151 | && bits <= 128 | |
2152 | && ((val = strtoul (val2, &endp, 10)) != ULONG_MAX | |
2153 | || errno != ERANGE) | |
2154 | && *endp == '\0' | |
2155 | && val <= INT_MAX) | |
2156 | { | |
2157 | struct scopelist *newp; | |
2158 | new_scope: | |
2159 | newp = malloc (sizeof (*newp)); | |
2160 | if (newp == NULL) | |
2161 | { | |
2162 | free (line); | |
2163 | fclose (fp); | |
2164 | goto no_file; | |
2165 | } | |
2166 | ||
2167 | newp->entry.netmask = htonl (bits != 96 | |
2168 | ? (0xffffffff | |
2169 | << (128 - bits)) | |
2170 | : 0); | |
2171 | newp->entry.addr32 = (prefix.s6_addr32[3] | |
2172 | & newp->entry.netmask); | |
2173 | newp->entry.scope = val; | |
2174 | newp->next = scopelist; | |
2175 | scopelist = newp; | |
2176 | ++nscopelist; | |
2177 | scopelist_nullbits |= bits == 96; | |
2178 | } | |
2179 | } | |
2180 | else if (inet_pton (AF_INET, val1, &prefix.s6_addr32[3]) | |
2181 | && (cp == NULL | |
2182 | || (bits = strtoul (cp, &endp, 10)) != ULONG_MAX | |
2183 | || errno != ERANGE) | |
2184 | && *endp == '\0' | |
2185 | && bits <= 32 | |
2186 | && ((val = strtoul (val2, &endp, 10)) != ULONG_MAX | |
2187 | || errno != ERANGE) | |
2188 | && *endp == '\0' | |
2189 | && val <= INT_MAX) | |
2190 | { | |
2191 | bits += 96; | |
2192 | goto new_scope; | |
2193 | } | |
2194 | } | |
2195 | break; | |
2196 | ||
77dd4c3b UD |
2197 | case 10: |
2198 | if (strcmp (cmd, "precedence") == 0) | |
2199 | { | |
2200 | listp = &precedencelist; | |
2201 | lenp = &nprecedencelist; | |
2202 | nullbitsp = &precedencelist_nullbits; | |
2203 | goto new_elem; | |
2204 | } | |
2205 | break; | |
2206 | } | |
2207 | } | |
2208 | ||
2209 | free (line); | |
2210 | ||
2211 | fclose (fp); | |
2212 | ||
2213 | /* Create the array for the labels. */ | |
2214 | struct prefixentry *new_labels; | |
2215 | if (nlabellist > 0) | |
2216 | { | |
2217 | if (!labellist_nullbits) | |
2218 | ++nlabellist; | |
2219 | new_labels = malloc (nlabellist * sizeof (*new_labels)); | |
2220 | if (new_labels == NULL) | |
2221 | goto no_file; | |
2222 | ||
2223 | int i = nlabellist; | |
2224 | if (!labellist_nullbits) | |
2225 | { | |
2226 | --i; | |
2227 | memset (&new_labels[i].prefix, '\0', sizeof (struct in6_addr)); | |
2228 | new_labels[i].bits = 0; | |
2229 | new_labels[i].val = 1; | |
2230 | } | |
2231 | ||
2232 | struct prefixlist *l = labellist; | |
2233 | while (i-- > 0) | |
2234 | { | |
2235 | new_labels[i] = l->entry; | |
2236 | l = l->next; | |
2237 | } | |
2238 | free_prefixlist (labellist); | |
2239 | ||
2240 | /* Sort the entries so that the most specific ones are at | |
2241 | the beginning. */ | |
2242 | qsort (new_labels, nlabellist, sizeof (*new_labels), prefixcmp); | |
2243 | } | |
2244 | else | |
2245 | new_labels = (struct prefixentry *) default_labels; | |
2246 | ||
2247 | struct prefixentry *new_precedence; | |
2248 | if (nprecedencelist > 0) | |
2249 | { | |
2250 | if (!precedencelist_nullbits) | |
2251 | ++nprecedencelist; | |
2252 | new_precedence = malloc (nprecedencelist * sizeof (*new_precedence)); | |
2253 | if (new_precedence == NULL) | |
2254 | { | |
2255 | if (new_labels != default_labels) | |
2256 | free (new_labels); | |
2257 | goto no_file; | |
2258 | } | |
2259 | ||
2260 | int i = nprecedencelist; | |
2261 | if (!precedencelist_nullbits) | |
2262 | { | |
2263 | --i; | |
2264 | memset (&new_precedence[i].prefix, '\0', | |
2265 | sizeof (struct in6_addr)); | |
2266 | new_precedence[i].bits = 0; | |
2267 | new_precedence[i].val = 40; | |
2268 | } | |
2269 | ||
2270 | struct prefixlist *l = precedencelist; | |
2271 | while (i-- > 0) | |
2272 | { | |
2273 | new_precedence[i] = l->entry; | |
2274 | l = l->next; | |
2275 | } | |
2276 | free_prefixlist (precedencelist); | |
2277 | ||
2278 | /* Sort the entries so that the most specific ones are at | |
2279 | the beginning. */ | |
ee72b971 | 2280 | qsort (new_precedence, nprecedencelist, sizeof (*new_precedence), |
77dd4c3b UD |
2281 | prefixcmp); |
2282 | } | |
2283 | else | |
2284 | new_precedence = (struct prefixentry *) default_precedence; | |
2285 | ||
ee72b971 UD |
2286 | struct scopeentry *new_scopes; |
2287 | if (nscopelist > 0) | |
2288 | { | |
2289 | if (!scopelist_nullbits) | |
2290 | ++nscopelist; | |
2291 | new_scopes = malloc (nscopelist * sizeof (*new_scopes)); | |
2292 | if (new_scopes == NULL) | |
2293 | { | |
2294 | if (new_labels != default_labels) | |
2295 | free (new_labels); | |
2296 | if (new_precedence != default_precedence) | |
2297 | free (new_precedence); | |
2298 | goto no_file; | |
2299 | } | |
2300 | ||
2301 | int i = nscopelist; | |
2302 | if (!scopelist_nullbits) | |
2303 | { | |
2304 | --i; | |
2305 | new_scopes[i].addr32 = 0; | |
2306 | new_scopes[i].netmask = 0; | |
2307 | new_scopes[i].scope = 14; | |
2308 | } | |
2309 | ||
2310 | struct scopelist *l = scopelist; | |
2311 | while (i-- > 0) | |
2312 | { | |
2313 | new_scopes[i] = l->entry; | |
2314 | l = l->next; | |
2315 | } | |
2316 | free_scopelist (scopelist); | |
2317 | ||
2318 | /* Sort the entries so that the most specific ones are at | |
2319 | the beginning. */ | |
2320 | qsort (new_scopes, nscopelist, sizeof (*new_scopes), | |
2321 | scopecmp); | |
2322 | } | |
2323 | else | |
2324 | new_scopes = (struct scopeentry *) default_scopes; | |
2325 | ||
77dd4c3b UD |
2326 | /* Now we are ready to replace the values. */ |
2327 | const struct prefixentry *old = labels; | |
2328 | labels = new_labels; | |
2329 | if (old != default_labels) | |
2330 | free ((void *) old); | |
2331 | ||
2332 | old = precedence; | |
2333 | precedence = new_precedence; | |
2334 | if (old != default_precedence) | |
2335 | free ((void *) old); | |
2336 | ||
ee72b971 UD |
2337 | const struct scopeentry *oldscope = scopes; |
2338 | scopes = new_scopes; | |
2339 | if (oldscope != default_scopes) | |
2340 | free ((void *) oldscope); | |
2341 | ||
a0844057 | 2342 | save_gaiconf_mtime (&st); |
77dd4c3b UD |
2343 | } |
2344 | else | |
2345 | { | |
2346 | no_file: | |
2347 | free_prefixlist (labellist); | |
2348 | free_prefixlist (precedencelist); | |
ee72b971 | 2349 | free_scopelist (scopelist); |
77dd4c3b UD |
2350 | |
2351 | /* If we previously read the file but it is gone now, free the | |
2352 | old data and use the builtin one. Leave the reload flag | |
2353 | alone. */ | |
2354 | fini (); | |
2355 | } | |
2356 | } | |
2357 | ||
2358 | ||
2359 | static void | |
2360 | gaiconf_reload (void) | |
2361 | { | |
2362 | struct stat64 st; | |
2363 | if (__xstat64 (_STAT_VER, GAICONF_FNAME, &st) != 0 | |
a0844057 | 2364 | || !check_gaiconf_mtime (&st)) |
77dd4c3b UD |
2365 | gaiconf_init (); |
2366 | } | |
2367 | ||
2368 | ||
40a55d20 UD |
2369 | int |
2370 | getaddrinfo (const char *name, const char *service, | |
2371 | const struct addrinfo *hints, struct addrinfo **pai) | |
46ec036d | 2372 | { |
786dcb62 | 2373 | int i = 0, last_i = 0; |
5ddb5bf5 | 2374 | int nresults = 0; |
786dcb62 | 2375 | struct addrinfo *p = NULL; |
46ec036d | 2376 | struct gaih_service gaih_service, *pservice; |
925c3c5c | 2377 | struct addrinfo local_hints; |
46ec036d | 2378 | |
40a55d20 | 2379 | if (name != NULL && name[0] == '*' && name[1] == 0) |
1fb05e3d UD |
2380 | name = NULL; |
2381 | ||
40a55d20 | 2382 | if (service != NULL && service[0] == '*' && service[1] == 0) |
1fb05e3d UD |
2383 | service = NULL; |
2384 | ||
40a55d20 | 2385 | if (name == NULL && service == NULL) |
46ec036d UD |
2386 | return EAI_NONAME; |
2387 | ||
40a55d20 UD |
2388 | if (hints == NULL) |
2389 | hints = &default_hints; | |
46ec036d | 2390 | |
925c3c5c UD |
2391 | if (hints->ai_flags |
2392 | & ~(AI_PASSIVE|AI_CANONNAME|AI_NUMERICHOST|AI_ADDRCONFIG|AI_V4MAPPED | |
e2fd3cbe | 2393 | #ifdef HAVE_LIBIDN |
3a0e90bd UD |
2394 | |AI_IDN|AI_CANONIDN|AI_IDN_ALLOW_UNASSIGNED |
2395 | |AI_IDN_USE_STD3_ASCII_RULES | |
e2fd3cbe | 2396 | #endif |
c1d98085 | 2397 | |AI_NUMERICSERV|AI_ALL)) |
46ec036d UD |
2398 | return EAI_BADFLAGS; |
2399 | ||
06877a37 | 2400 | if ((hints->ai_flags & AI_CANONNAME) && name == NULL) |
46ec036d UD |
2401 | return EAI_BADFLAGS; |
2402 | ||
cf6ada44 | 2403 | struct in6addrinfo *in6ai = NULL; |
e53f0f51 | 2404 | size_t in6ailen = 0; |
3af48b5b UD |
2405 | bool seen_ipv4 = false; |
2406 | bool seen_ipv6 = false; | |
fa3fc0fe | 2407 | bool check_pf_called = false; |
e53f0f51 | 2408 | |
925c3c5c UD |
2409 | if (hints->ai_flags & AI_ADDRCONFIG) |
2410 | { | |
fa3fc0fe UD |
2411 | /* We might need information about what interfaces are available. |
2412 | Also determine whether we have IPv4 or IPv6 interfaces or both. We | |
2413 | cannot cache the results since new interfaces could be added at | |
2414 | any time. */ | |
2415 | __check_pf (&seen_ipv4, &seen_ipv6, &in6ai, &in6ailen); | |
2416 | check_pf_called = true; | |
2417 | ||
925c3c5c | 2418 | /* Now make a decision on what we return, if anything. */ |
c1d98085 | 2419 | if (hints->ai_family == PF_UNSPEC && (seen_ipv4 || seen_ipv6)) |
925c3c5c UD |
2420 | { |
2421 | /* If we haven't seen both IPv4 and IPv6 interfaces we can | |
2422 | narrow down the search. */ | |
be4607eb | 2423 | if ((! seen_ipv4 || ! seen_ipv6) && (seen_ipv4 || seen_ipv6)) |
925c3c5c UD |
2424 | { |
2425 | local_hints = *hints; | |
2426 | local_hints.ai_family = seen_ipv4 ? PF_INET : PF_INET6; | |
2427 | hints = &local_hints; | |
2428 | } | |
2429 | } | |
2430 | else if ((hints->ai_family == PF_INET && ! seen_ipv4) | |
2431 | || (hints->ai_family == PF_INET6 && ! seen_ipv6)) | |
3af48b5b UD |
2432 | { |
2433 | /* We cannot possibly return a valid answer. */ | |
3a2c0242 | 2434 | __free_in6ai (in6ai); |
3af48b5b UD |
2435 | return EAI_NONAME; |
2436 | } | |
925c3c5c UD |
2437 | } |
2438 | ||
40a55d20 UD |
2439 | if (service && service[0]) |
2440 | { | |
2441 | char *c; | |
2442 | gaih_service.name = service; | |
2443 | gaih_service.num = strtoul (gaih_service.name, &c, 10); | |
c1d98085 UD |
2444 | if (*c != '\0') |
2445 | { | |
2446 | if (hints->ai_flags & AI_NUMERICSERV) | |
3af48b5b | 2447 | { |
3a2c0242 | 2448 | __free_in6ai (in6ai); |
3af48b5b UD |
2449 | return EAI_NONAME; |
2450 | } | |
c1d98085 UD |
2451 | |
2452 | gaih_service.num = -1; | |
2453 | } | |
ca225a41 | 2454 | |
40a55d20 UD |
2455 | pservice = &gaih_service; |
2456 | } | |
2457 | else | |
46ec036d UD |
2458 | pservice = NULL; |
2459 | ||
d0a1ae94 | 2460 | struct addrinfo **end = &p; |
1fb05e3d | 2461 | |
01abbc0f | 2462 | unsigned int naddrs = 0; |
786dcb62 UD |
2463 | if (hints->ai_family == AF_UNSPEC || hints->ai_family == AF_INET |
2464 | || hints->ai_family == AF_INET6) | |
2465 | { | |
2466 | last_i = gaih_inet (name, pservice, hints, end, &naddrs); | |
2467 | if (last_i != 0) | |
2468 | { | |
2469 | freeaddrinfo (p); | |
3a2c0242 | 2470 | __free_in6ai (in6ai); |
786dcb62 | 2471 | |
105a492d | 2472 | return -(last_i & GAIH_EAI); |
786dcb62 | 2473 | } |
d0a1ae94 UD |
2474 | while (*end) |
2475 | { | |
2476 | end = &((*end)->ai_next); | |
2477 | ++nresults; | |
2478 | } | |
786dcb62 UD |
2479 | } |
2480 | else | |
2481 | { | |
3a2c0242 | 2482 | __free_in6ai (in6ai); |
786dcb62 UD |
2483 | return EAI_FAMILY; |
2484 | } | |
46ec036d | 2485 | |
01abbc0f | 2486 | if (naddrs > 1) |
5ddb5bf5 | 2487 | { |
77dd4c3b UD |
2488 | /* Read the config file. */ |
2489 | __libc_once_define (static, once); | |
2490 | __typeof (once) old_once = once; | |
2491 | __libc_once (once, gaiconf_init); | |
5ddb5bf5 | 2492 | /* Sort results according to RFC 3484. */ |
1cef1b19 AS |
2493 | struct sort_result *results; |
2494 | size_t *order; | |
5ddb5bf5 | 2495 | struct addrinfo *q; |
d19687d6 | 2496 | struct addrinfo *last = NULL; |
c7fa647a | 2497 | char *canonname = NULL; |
1cef1b19 | 2498 | bool malloc_results; |
2169712d | 2499 | size_t alloc_size = nresults * (sizeof (*results) + sizeof (size_t)); |
1cef1b19 AS |
2500 | |
2501 | malloc_results | |
2169712d | 2502 | = !__libc_use_alloca (alloc_size); |
1cef1b19 AS |
2503 | if (malloc_results) |
2504 | { | |
2169712d | 2505 | results = malloc (alloc_size); |
1cef1b19 AS |
2506 | if (results == NULL) |
2507 | { | |
2508 | __free_in6ai (in6ai); | |
2509 | return EAI_MEMORY; | |
2510 | } | |
2511 | } | |
2512 | else | |
2169712d | 2513 | results = alloca (alloc_size); |
1cef1b19 | 2514 | order = (size_t *) (results + nresults); |
5ddb5bf5 | 2515 | |
fa3fc0fe UD |
2516 | /* Now we definitely need the interface information. */ |
2517 | if (! check_pf_called) | |
2518 | __check_pf (&seen_ipv4, &seen_ipv6, &in6ai, &in6ailen); | |
2519 | ||
773e79b3 | 2520 | /* If we have information about deprecated and temporary addresses |
3af48b5b UD |
2521 | sort the array now. */ |
2522 | if (in6ai != NULL) | |
2523 | qsort (in6ai, in6ailen, sizeof (*in6ai), in6aicmp); | |
2524 | ||
e1db0493 UD |
2525 | int fd = -1; |
2526 | int af = AF_UNSPEC; | |
2527 | ||
d19687d6 | 2528 | for (i = 0, q = p; q != NULL; ++i, last = q, q = q->ai_next) |
5ddb5bf5 UD |
2529 | { |
2530 | results[i].dest_addr = q; | |
773e79b3 | 2531 | results[i].native = -1; |
0efd1956 | 2532 | order[i] = i; |
5ddb5bf5 | 2533 | |
007a3ddc | 2534 | /* If we just looked up the address for a different |
d19687d6 UD |
2535 | protocol, reuse the result. */ |
2536 | if (last != NULL && last->ai_addrlen == q->ai_addrlen | |
2537 | && memcmp (last->ai_addr, q->ai_addr, q->ai_addrlen) == 0) | |
5ddb5bf5 | 2538 | { |
d19687d6 UD |
2539 | memcpy (&results[i].source_addr, &results[i - 1].source_addr, |
2540 | results[i - 1].source_addr_len); | |
2541 | results[i].source_addr_len = results[i - 1].source_addr_len; | |
2542 | results[i].got_source_addr = results[i - 1].got_source_addr; | |
3af48b5b | 2543 | results[i].source_addr_flags = results[i - 1].source_addr_flags; |
6f3914d5 | 2544 | results[i].prefixlen = results[i - 1].prefixlen; |
773e79b3 | 2545 | results[i].index = results[i - 1].index; |
d19687d6 UD |
2546 | } |
2547 | else | |
2548 | { | |
6f3914d5 | 2549 | results[i].got_source_addr = false; |
3af48b5b | 2550 | results[i].source_addr_flags = 0; |
6f3914d5 | 2551 | results[i].prefixlen = 0; |
773e79b3 | 2552 | results[i].index = 0xffffffffu; |
3af48b5b | 2553 | |
007a3ddc UD |
2554 | /* We overwrite the type with SOCK_DGRAM since we do not |
2555 | want connect() to connect to the other side. If we | |
2556 | cannot determine the source address remember this | |
2557 | fact. */ | |
e1db0493 UD |
2558 | if (fd == -1 || (af == AF_INET && q->ai_family == AF_INET6)) |
2559 | { | |
2560 | if (fd != -1) | |
2561 | close_retry: | |
e6eec9ce | 2562 | close_not_cancel_no_status (fd); |
e1db0493 UD |
2563 | af = q->ai_family; |
2564 | fd = __socket (af, SOCK_DGRAM, IPPROTO_IP); | |
2565 | } | |
2566 | else | |
2567 | { | |
2568 | /* Reset the connection. */ | |
2569 | struct sockaddr sa = { .sa_family = AF_UNSPEC }; | |
2570 | __connect (fd, &sa, sizeof (sa)); | |
2571 | } | |
2572 | ||
007a3ddc UD |
2573 | socklen_t sl = sizeof (results[i].source_addr); |
2574 | if (fd != -1 | |
2575 | && __connect (fd, q->ai_addr, q->ai_addrlen) == 0 | |
2576 | && __getsockname (fd, | |
2577 | (struct sockaddr *) &results[i].source_addr, | |
2578 | &sl) == 0) | |
d19687d6 | 2579 | { |
007a3ddc UD |
2580 | results[i].source_addr_len = sl; |
2581 | results[i].got_source_addr = true; | |
3af48b5b | 2582 | |
6f3914d5 | 2583 | if (in6ai != NULL) |
3af48b5b | 2584 | { |
e1db0493 | 2585 | /* See whether the source address is on the list of |
11bf311e | 2586 | deprecated or temporary addresses. */ |
3af48b5b | 2587 | struct in6addrinfo tmp; |
6f3914d5 UD |
2588 | |
2589 | if (q->ai_family == AF_INET && af == AF_INET) | |
2590 | { | |
2591 | struct sockaddr_in *sinp | |
2592 | = (struct sockaddr_in *) &results[i].source_addr; | |
2593 | tmp.addr[0] = 0; | |
2594 | tmp.addr[1] = 0; | |
2595 | tmp.addr[2] = htonl (0xffff); | |
2596 | tmp.addr[3] = sinp->sin_addr.s_addr; | |
2597 | } | |
2598 | else | |
2599 | { | |
2600 | struct sockaddr_in6 *sin6p | |
2601 | = (struct sockaddr_in6 *) &results[i].source_addr; | |
2602 | memcpy (tmp.addr, &sin6p->sin6_addr, IN6ADDRSZ); | |
2603 | } | |
3af48b5b UD |
2604 | |
2605 | struct in6addrinfo *found | |
2606 | = bsearch (&tmp, in6ai, in6ailen, sizeof (*in6ai), | |
2607 | in6aicmp); | |
2608 | if (found != NULL) | |
6f3914d5 UD |
2609 | { |
2610 | results[i].source_addr_flags = found->flags; | |
2611 | results[i].prefixlen = found->prefixlen; | |
773e79b3 | 2612 | results[i].index = found->index; |
6f3914d5 | 2613 | } |
3af48b5b | 2614 | } |
6f3914d5 UD |
2615 | |
2616 | if (q->ai_family == AF_INET && af == AF_INET6) | |
e1db0493 UD |
2617 | { |
2618 | /* We have to convert the address. The socket is | |
2619 | IPv6 and the request is for IPv4. */ | |
2620 | struct sockaddr_in6 *sin6 | |
2621 | = (struct sockaddr_in6 *) &results[i].source_addr; | |
2622 | struct sockaddr_in *sin | |
2623 | = (struct sockaddr_in *) &results[i].source_addr; | |
2624 | assert (IN6_IS_ADDR_V4MAPPED (sin6->sin6_addr.s6_addr32)); | |
6f3914d5 UD |
2625 | sin->sin_family = AF_INET; |
2626 | /* We do not have to initialize sin_port since this | |
2627 | fields has the same position and size in the IPv6 | |
2628 | structure. */ | |
2629 | assert (offsetof (struct sockaddr_in, sin_port) | |
2630 | == offsetof (struct sockaddr_in6, sin6_port)); | |
2631 | assert (sizeof (sin->sin_port) | |
2632 | == sizeof (sin6->sin6_port)); | |
e1db0493 UD |
2633 | memcpy (&sin->sin_addr, |
2634 | &sin6->sin6_addr.s6_addr32[3], INADDRSZ); | |
6f3914d5 | 2635 | results[i].source_addr_len = sizeof (struct sockaddr_in); |
e1db0493 | 2636 | } |
d19687d6 | 2637 | } |
e1db0493 UD |
2638 | else if (errno == EAFNOSUPPORT && af == AF_INET6 |
2639 | && q->ai_family == AF_INET) | |
2640 | /* This could mean IPv6 sockets are IPv6-only. */ | |
2641 | goto close_retry; | |
007a3ddc UD |
2642 | else |
2643 | /* Just make sure that if we have to process the same | |
2644 | address again we do not copy any memory. */ | |
2645 | results[i].source_addr_len = 0; | |
5ddb5bf5 | 2646 | } |
c7fa647a UD |
2647 | |
2648 | /* Remember the canonical name. */ | |
2649 | if (q->ai_canonname != NULL) | |
2650 | { | |
2651 | assert (canonname == NULL); | |
2652 | canonname = q->ai_canonname; | |
2653 | q->ai_canonname = NULL; | |
2654 | } | |
5ddb5bf5 UD |
2655 | } |
2656 | ||
e1db0493 UD |
2657 | if (fd != -1) |
2658 | close_not_cancel_no_status (fd); | |
2659 | ||
5ddb5bf5 UD |
2660 | /* We got all the source addresses we can get, now sort using |
2661 | the information. */ | |
773e79b3 UD |
2662 | struct sort_result_combo src |
2663 | = { .results = results, .nresults = nresults }; | |
fc4837e5 UD |
2664 | if (__builtin_expect (gaiconf_reload_flag_ever_set, 0)) |
2665 | { | |
2666 | __libc_lock_define_initialized (static, lock); | |
2667 | ||
2668 | __libc_lock_lock (lock); | |
be971a2b | 2669 | if (__libc_once_get (old_once) && gaiconf_reload_flag) |
fc4837e5 | 2670 | gaiconf_reload (); |
0efd1956 | 2671 | qsort_r (order, nresults, sizeof (order[0]), rfc3484_sort, &src); |
fc4837e5 UD |
2672 | __libc_lock_unlock (lock); |
2673 | } | |
2674 | else | |
0efd1956 | 2675 | qsort_r (order, nresults, sizeof (order[0]), rfc3484_sort, &src); |
5ddb5bf5 UD |
2676 | |
2677 | /* Queue the results up as they come out of sorting. */ | |
0efd1956 | 2678 | q = p = results[order[0]].dest_addr; |
5ddb5bf5 | 2679 | for (i = 1; i < nresults; ++i) |
0efd1956 | 2680 | q = q->ai_next = results[order[i]].dest_addr; |
5ddb5bf5 | 2681 | q->ai_next = NULL; |
c7fa647a UD |
2682 | |
2683 | /* Fill in the canonical name into the new first entry. */ | |
2684 | p->ai_canonname = canonname; | |
1cef1b19 AS |
2685 | |
2686 | if (malloc_results) | |
2687 | free (results); | |
5ddb5bf5 UD |
2688 | } |
2689 | ||
3a2c0242 | 2690 | __free_in6ai (in6ai); |
3af48b5b | 2691 | |
40a55d20 UD |
2692 | if (p) |
2693 | { | |
2694 | *pai = p; | |
2695 | return 0; | |
2696 | } | |
46ec036d | 2697 | |
a0bf6ac7 | 2698 | return last_i ? -(last_i & GAIH_EAI) : EAI_NONAME; |
46ec036d | 2699 | } |
9b0b40d3 | 2700 | libc_hidden_def (getaddrinfo) |
46ec036d | 2701 | |
01767843 | 2702 | nss_interface_function (getaddrinfo) |
2f7f7bc6 | 2703 | |
40a55d20 UD |
2704 | void |
2705 | freeaddrinfo (struct addrinfo *ai) | |
46ec036d UD |
2706 | { |
2707 | struct addrinfo *p; | |
2708 | ||
40a55d20 UD |
2709 | while (ai != NULL) |
2710 | { | |
2711 | p = ai; | |
2712 | ai = ai->ai_next; | |
b9343764 | 2713 | free (p->ai_canonname); |
40a55d20 UD |
2714 | free (p); |
2715 | } | |
46ec036d | 2716 | } |
9b0b40d3 | 2717 | libc_hidden_def (freeaddrinfo) |