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Commit | Line | Data |
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1fb05e3d 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.] |
1fb05e3d 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 | ||
1fb05e3d | 38 | #include <errno.h> |
c0bc5f7b | 39 | #include <netdb.h> |
965cba04 | 40 | #include <stddef.h> |
6ac36398 | 41 | #include <stdlib.h> |
1fb05e3d | 42 | #include <stdio.h> |
c0bc5f7b | 43 | #include <string.h> |
1fb05e3d | 44 | #include <unistd.h> |
e054f494 | 45 | #include <stdint.h> |
5a97622d | 46 | #include <arpa/inet.h> |
c0bc5f7b UD |
47 | #include <net/if.h> |
48 | #include <netinet/in.h> | |
49 | #include <sys/param.h> | |
50 | #include <sys/socket.h> | |
51 | #include <sys/types.h> | |
52 | #include <sys/un.h> | |
53 | #include <sys/utsname.h> | |
54 | #include <bits/libc-lock.h> | |
c6ee40da | 55 | #include <scratch_buffer.h> |
1fb05e3d | 56 | |
ab0fcbfa UD |
57 | #ifdef HAVE_LIBIDN |
58 | # include <libidn/idna.h> | |
59 | extern int __idna_to_unicode_lzlz (const char *input, char **output, | |
60 | int flags); | |
61 | #endif | |
62 | ||
1fb05e3d | 63 | #ifndef min |
cd6ede75 | 64 | # define min(x,y) (((x) > (y)) ? (y) : (x)) |
1fb05e3d UD |
65 | #endif /* min */ |
66 | ||
0d297437 UD |
67 | libc_freeres_ptr (static char *domain); |
68 | ||
1fb05e3d | 69 | |
40a55d20 | 70 | static char * |
dfd2257a | 71 | internal_function |
cd6ede75 | 72 | nrl_domainname (void) |
1fb05e3d | 73 | { |
390500b1 | 74 | static int not_first; |
1fb05e3d | 75 | |
3a07823a | 76 | if (! not_first) |
cd6ede75 UD |
77 | { |
78 | __libc_lock_define_initialized (static, lock); | |
79 | __libc_lock_lock (lock); | |
80 | ||
3a07823a | 81 | if (! not_first) |
cd6ede75 UD |
82 | { |
83 | char *c; | |
84 | struct hostent *h, th; | |
cd6ede75 | 85 | int herror; |
c6ee40da | 86 | struct scratch_buffer tmpbuf; |
cd6ede75 | 87 | |
c6ee40da | 88 | scratch_buffer_init (&tmpbuf); |
390500b1 | 89 | not_first = 1; |
cd6ede75 | 90 | |
c6ee40da FW |
91 | while (__gethostbyname_r ("localhost", &th, |
92 | tmpbuf.data, tmpbuf.length, | |
93 | &h, &herror)) | |
cd6ede75 UD |
94 | { |
95 | if (herror == NETDB_INTERNAL && errno == ERANGE) | |
c6ee40da FW |
96 | { |
97 | if (!scratch_buffer_grow (&tmpbuf)) | |
98 | goto done; | |
99 | } | |
cd6ede75 UD |
100 | else |
101 | break; | |
102 | } | |
5a97622d | 103 | |
cd6ede75 UD |
104 | if (h && (c = strchr (h->h_name, '.'))) |
105 | domain = __strdup (++c); | |
106 | else | |
107 | { | |
108 | /* The name contains no domain information. Use the name | |
109 | now to get more information. */ | |
c6ee40da FW |
110 | while (__gethostname (tmpbuf.data, tmpbuf.length)) |
111 | if (!scratch_buffer_grow (&tmpbuf)) | |
112 | goto done; | |
5a97622d | 113 | |
c6ee40da | 114 | if ((c = strchr (tmpbuf.data, '.'))) |
cd6ede75 UD |
115 | domain = __strdup (++c); |
116 | else | |
117 | { | |
118 | /* We need to preserve the hostname. */ | |
c6ee40da | 119 | const char *hstname = strdupa (tmpbuf.data); |
cd6ede75 | 120 | |
c6ee40da FW |
121 | while (__gethostbyname_r (hstname, &th, |
122 | tmpbuf.data, tmpbuf.length, | |
cd6ede75 UD |
123 | &h, &herror)) |
124 | { | |
125 | if (herror == NETDB_INTERNAL && errno == ERANGE) | |
c6ee40da FW |
126 | { |
127 | if (!scratch_buffer_grow (&tmpbuf)) | |
128 | goto done; | |
129 | } | |
cd6ede75 UD |
130 | else |
131 | break; | |
132 | } | |
133 | ||
134 | if (h && (c = strchr(h->h_name, '.'))) | |
135 | domain = __strdup (++c); | |
136 | else | |
137 | { | |
138 | struct in_addr in_addr; | |
139 | ||
062a2a18 | 140 | in_addr.s_addr = htonl (INADDR_LOOPBACK); |
cd6ede75 UD |
141 | |
142 | while (__gethostbyaddr_r ((const char *) &in_addr, | |
143 | sizeof (struct in_addr), | |
c6ee40da FW |
144 | AF_INET, &th, |
145 | tmpbuf.data, tmpbuf.length, | |
146 | &h, &herror)) | |
cd6ede75 UD |
147 | { |
148 | if (herror == NETDB_INTERNAL && errno == ERANGE) | |
c6ee40da FW |
149 | { |
150 | if (!scratch_buffer_grow (&tmpbuf)) | |
151 | goto done; | |
152 | } | |
cd6ede75 UD |
153 | else |
154 | break; | |
155 | } | |
156 | ||
157 | if (h && (c = strchr (h->h_name, '.'))) | |
158 | domain = __strdup (++c); | |
159 | } | |
160 | } | |
5a97622d | 161 | } |
c6ee40da FW |
162 | done: |
163 | scratch_buffer_free (&tmpbuf); | |
5a97622d | 164 | } |
1fb05e3d | 165 | |
cd6ede75 | 166 | __libc_lock_unlock (lock); |
1fb05e3d UD |
167 | } |
168 | ||
1fb05e3d UD |
169 | return domain; |
170 | }; | |
171 | ||
cd6ede75 UD |
172 | |
173 | int | |
c7614ee9 | 174 | getnameinfo (const struct sockaddr *sa, socklen_t addrlen, char *host, |
ccd4b479 | 175 | socklen_t hostlen, char *serv, socklen_t servlen, |
e4ecafe0 | 176 | int flags) |
1fb05e3d UD |
177 | { |
178 | int serrno = errno; | |
5a97622d | 179 | int herrno; |
5a97622d | 180 | struct hostent th; |
c0bc5f7b | 181 | int ok = 0; |
c6ee40da FW |
182 | struct scratch_buffer tmpbuf; |
183 | ||
184 | scratch_buffer_init (&tmpbuf); | |
1fb05e3d | 185 | |
ab0fcbfa UD |
186 | if (flags & ~(NI_NUMERICHOST|NI_NUMERICSERV|NI_NOFQDN|NI_NAMEREQD|NI_DGRAM |
187 | #ifdef HAVE_LIBIDN | |
3a0e90bd | 188 | |NI_IDN|NI_IDN_ALLOW_UNASSIGNED|NI_IDN_USE_STD3_ASCII_RULES |
ab0fcbfa UD |
189 | #endif |
190 | )) | |
85599e53 UD |
191 | return EAI_BADFLAGS; |
192 | ||
922809a2 | 193 | if (sa == NULL || addrlen < sizeof (sa_family_t)) |
85599e53 | 194 | return EAI_FAMILY; |
922809a2 | 195 | |
d4f0720b UD |
196 | if ((flags & NI_NAMEREQD) && host == NULL && serv == NULL) |
197 | return EAI_NONAME; | |
198 | ||
922809a2 UD |
199 | switch (sa->sa_family) |
200 | { | |
201 | case AF_LOCAL: | |
965cba04 | 202 | if (addrlen < (socklen_t) offsetof (struct sockaddr_un, sun_path)) |
85599e53 | 203 | return EAI_FAMILY; |
4fcddf8e UD |
204 | break; |
205 | case AF_INET: | |
206 | if (addrlen < sizeof (struct sockaddr_in)) | |
85599e53 | 207 | return EAI_FAMILY; |
4fcddf8e UD |
208 | break; |
209 | case AF_INET6: | |
210 | if (addrlen < sizeof (struct sockaddr_in6)) | |
85599e53 | 211 | return EAI_FAMILY; |
922809a2 UD |
212 | break; |
213 | default: | |
85599e53 | 214 | return EAI_FAMILY; |
922809a2 | 215 | } |
1fb05e3d | 216 | |
cd6ede75 | 217 | if (host != NULL && hostlen > 0) |
4fcddf8e | 218 | switch (sa->sa_family) |
cd6ede75 | 219 | { |
1fb05e3d | 220 | case AF_INET: |
1fb05e3d | 221 | case AF_INET6: |
cd6ede75 UD |
222 | if (!(flags & NI_NUMERICHOST)) |
223 | { | |
224 | struct hostent *h = NULL; | |
6e310111 UD |
225 | if (sa->sa_family == AF_INET6) |
226 | { | |
227 | while (__gethostbyaddr_r ((const void *) &(((const struct sockaddr_in6 *) sa)->sin6_addr), | |
228 | sizeof(struct in6_addr), | |
c6ee40da FW |
229 | AF_INET6, &th, |
230 | tmpbuf.data, tmpbuf.length, | |
6e310111 UD |
231 | &h, &herrno)) |
232 | if (herrno == NETDB_INTERNAL && errno == ERANGE) | |
c6ee40da FW |
233 | { |
234 | if (!scratch_buffer_grow (&tmpbuf)) | |
235 | { | |
236 | __set_h_errno (herrno); | |
237 | return EAI_MEMORY; | |
238 | } | |
239 | } | |
6e310111 UD |
240 | else |
241 | break; | |
242 | } | |
243 | else | |
244 | { | |
245 | while (__gethostbyaddr_r ((const void *) &(((const struct sockaddr_in *)sa)->sin_addr), | |
c6ee40da FW |
246 | sizeof(struct in_addr), |
247 | AF_INET, &th, | |
248 | tmpbuf.data, tmpbuf.length, | |
6e310111 UD |
249 | &h, &herrno)) |
250 | if (herrno == NETDB_INTERNAL && errno == ERANGE) | |
c6ee40da FW |
251 | { |
252 | if (!scratch_buffer_grow (&tmpbuf)) | |
253 | { | |
254 | __set_h_errno (herrno); | |
255 | return EAI_MEMORY; | |
256 | } | |
257 | } | |
6e310111 UD |
258 | else |
259 | break; | |
260 | } | |
261 | ||
cd6ede75 UD |
262 | if (h == NULL) |
263 | { | |
6e310111 | 264 | if (herrno == NETDB_INTERNAL) |
cd6ede75 | 265 | { |
6e310111 UD |
266 | __set_h_errno (herrno); |
267 | return EAI_SYSTEM; | |
5a97622d | 268 | } |
6e310111 | 269 | if (herrno == TRY_AGAIN) |
cd6ede75 | 270 | { |
6e310111 UD |
271 | __set_h_errno (herrno); |
272 | return EAI_AGAIN; | |
cd6ede75 | 273 | } |
5a97622d | 274 | } |
1fb05e3d | 275 | |
cd6ede75 UD |
276 | if (h) |
277 | { | |
85599e53 | 278 | char *c; |
104d0bd3 | 279 | if ((flags & NI_NOFQDN) |
85599e53 UD |
280 | && (c = nrl_domainname ()) |
281 | && (c = strstr (h->h_name, c)) | |
282 | && (c != h->h_name) && (*(--c) == '.')) | |
ab0fcbfa UD |
283 | /* Terminate the string after the prefix. */ |
284 | *c = '\0'; | |
285 | ||
286 | #ifdef HAVE_LIBIDN | |
287 | /* If requested, convert from the IDN format. */ | |
288 | if (flags & NI_IDN) | |
cd6ede75 | 289 | { |
3a0e90bd UD |
290 | int idn_flags = 0; |
291 | if (flags & NI_IDN_ALLOW_UNASSIGNED) | |
292 | idn_flags |= IDNA_ALLOW_UNASSIGNED; | |
293 | if (flags & NI_IDN_USE_STD3_ASCII_RULES) | |
294 | idn_flags |= IDNA_USE_STD3_ASCII_RULES; | |
295 | ||
ab0fcbfa | 296 | char *out; |
3a0e90bd UD |
297 | int rc = __idna_to_unicode_lzlz (h->h_name, &out, |
298 | idn_flags); | |
ab0fcbfa UD |
299 | if (rc != IDNA_SUCCESS) |
300 | { | |
301 | if (rc == IDNA_MALLOC_ERROR) | |
302 | return EAI_MEMORY; | |
303 | if (rc == IDNA_DLOPEN_ERROR) | |
304 | return EAI_SYSTEM; | |
305 | return EAI_IDN_ENCODE; | |
306 | } | |
307 | ||
308 | if (out != h->h_name) | |
309 | { | |
310 | h->h_name = strdupa (out); | |
311 | free (out); | |
312 | } | |
cd6ede75 | 313 | } |
ab0fcbfa UD |
314 | #endif |
315 | ||
316 | size_t len = strlen (h->h_name) + 1; | |
317 | if (len > hostlen) | |
318 | return EAI_OVERFLOW; | |
319 | ||
320 | memcpy (host, h->h_name, len); | |
321 | ||
322 | ok = 1; | |
cd6ede75 UD |
323 | } |
324 | } | |
1fb05e3d | 325 | |
c0bc5f7b | 326 | if (!ok) |
40a55d20 | 327 | { |
c0bc5f7b | 328 | if (flags & NI_NAMEREQD) |
40a55d20 UD |
329 | { |
330 | __set_errno (serrno); | |
85599e53 | 331 | return EAI_NONAME; |
40a55d20 | 332 | } |
c0bc5f7b UD |
333 | else |
334 | { | |
335 | const char *c; | |
336 | if (sa->sa_family == AF_INET6) | |
337 | { | |
c3301189 | 338 | const struct sockaddr_in6 *sin6p; |
c0bc5f7b UD |
339 | uint32_t scopeid; |
340 | ||
c3301189 UD |
341 | sin6p = (const struct sockaddr_in6 *) sa; |
342 | ||
c0bc5f7b | 343 | c = inet_ntop (AF_INET6, |
c3301189 | 344 | (const void *) &sin6p->sin6_addr, host, hostlen); |
85599e53 UD |
345 | scopeid = sin6p->sin6_scope_id; |
346 | if (scopeid != 0) | |
c0bc5f7b UD |
347 | { |
348 | /* Buffer is >= IFNAMSIZ+1. */ | |
4fcddf8e | 349 | char scopebuf[IFNAMSIZ + 1]; |
85599e53 | 350 | char *scopeptr; |
c0bc5f7b | 351 | int ni_numericscope = 0; |
85599e53 UD |
352 | size_t real_hostlen = __strnlen (host, hostlen); |
353 | size_t scopelen = 0; | |
354 | ||
355 | scopebuf[0] = SCOPE_DELIMITER; | |
356 | scopebuf[1] = '\0'; | |
357 | scopeptr = &scopebuf[1]; | |
c0bc5f7b UD |
358 | |
359 | if (IN6_IS_ADDR_LINKLOCAL (&sin6p->sin6_addr) | |
360 | || IN6_IS_ADDR_MC_LINKLOCAL (&sin6p->sin6_addr)) | |
361 | { | |
5804f16c | 362 | if (if_indextoname (scopeid, scopeptr) == NULL) |
c0bc5f7b | 363 | ++ni_numericscope; |
85599e53 UD |
364 | else |
365 | scopelen = strlen (scopebuf); | |
c0bc5f7b UD |
366 | } |
367 | else | |
368 | ++ni_numericscope; | |
369 | ||
370 | if (ni_numericscope) | |
85599e53 UD |
371 | scopelen = 1 + __snprintf (scopeptr, |
372 | (scopebuf | |
373 | + sizeof scopebuf | |
374 | - scopeptr), | |
375 | "%u", scopeid); | |
376 | ||
377 | if (real_hostlen + scopelen + 1 > hostlen) | |
27deeafc UD |
378 | /* Signal the buffer is too small. This is |
379 | what inet_ntop does. */ | |
380 | c = NULL; | |
381 | else | |
382 | memcpy (host + real_hostlen, scopebuf, scopelen + 1); | |
c0bc5f7b UD |
383 | } |
384 | } | |
385 | else | |
386 | c = inet_ntop (AF_INET, | |
c3301189 | 387 | (const void *) &(((const struct sockaddr_in *) sa)->sin_addr), |
c0bc5f7b UD |
388 | host, hostlen); |
389 | if (c == NULL) | |
27deeafc | 390 | return EAI_OVERFLOW; |
c0bc5f7b UD |
391 | } |
392 | ok = 1; | |
cd6ede75 | 393 | } |
1fb05e3d | 394 | break; |
cd6ede75 | 395 | |
1fb05e3d | 396 | case AF_LOCAL: |
cd6ede75 UD |
397 | if (!(flags & NI_NUMERICHOST)) |
398 | { | |
399 | struct utsname utsname; | |
1fb05e3d | 400 | |
cd6ede75 UD |
401 | if (!uname (&utsname)) |
402 | { | |
403 | strncpy (host, utsname.nodename, hostlen); | |
404 | break; | |
405 | }; | |
1fb05e3d | 406 | }; |
1fb05e3d UD |
407 | |
408 | if (flags & NI_NAMEREQD) | |
40a55d20 UD |
409 | { |
410 | __set_errno (serrno); | |
85599e53 | 411 | return EAI_NONAME; |
40a55d20 | 412 | } |
1fb05e3d | 413 | |
cd6ede75 | 414 | strncpy (host, "localhost", hostlen); |
1fb05e3d | 415 | break; |
cd6ede75 | 416 | |
1fb05e3d | 417 | default: |
e4ecafe0 | 418 | return EAI_FAMILY; |
cd6ede75 | 419 | } |
1fb05e3d UD |
420 | |
421 | if (serv && (servlen > 0)) | |
4fcddf8e | 422 | switch (sa->sa_family) |
cd6ede75 | 423 | { |
1fb05e3d | 424 | case AF_INET: |
1fb05e3d | 425 | case AF_INET6: |
cd6ede75 UD |
426 | if (!(flags & NI_NUMERICSERV)) |
427 | { | |
428 | struct servent *s, ts; | |
0292b0dd UD |
429 | int e; |
430 | while ((e = __getservbyport_r (((const struct sockaddr_in *) sa)->sin_port, | |
431 | ((flags & NI_DGRAM) | |
c6ee40da FW |
432 | ? "udp" : "tcp"), &ts, |
433 | tmpbuf.data, tmpbuf.length, &s))) | |
cd6ede75 | 434 | { |
0292b0dd | 435 | if (e == ERANGE) |
c6ee40da FW |
436 | { |
437 | if (!scratch_buffer_grow (&tmpbuf)) | |
438 | return EAI_MEMORY; | |
439 | } | |
cd6ede75 | 440 | else |
0292b0dd | 441 | break; |
cd6ede75 UD |
442 | } |
443 | if (s) | |
444 | { | |
40a55d20 | 445 | strncpy (serv, s->s_name, servlen); |
cd6ede75 | 446 | break; |
5a97622d | 447 | } |
5a97622d | 448 | } |
ab0fcbfa UD |
449 | |
450 | if (__snprintf (serv, servlen, "%d", | |
451 | ntohs (((const struct sockaddr_in *) sa)->sin_port)) | |
452 | + 1 > servlen) | |
453 | return EAI_OVERFLOW; | |
454 | ||
1fb05e3d | 455 | break; |
cd6ede75 | 456 | |
1fb05e3d | 457 | case AF_LOCAL: |
c3301189 | 458 | strncpy (serv, ((const struct sockaddr_un *) sa)->sun_path, servlen); |
1fb05e3d | 459 | break; |
cd6ede75 UD |
460 | } |
461 | ||
1fb05e3d UD |
462 | if (host && (hostlen > 0)) |
463 | host[hostlen-1] = 0; | |
464 | if (serv && (servlen > 0)) | |
465 | serv[servlen-1] = 0; | |
466 | errno = serrno; | |
467 | return 0; | |
40a55d20 | 468 | } |
9b0b40d3 | 469 | libc_hidden_def (getnameinfo) |