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Commit | Line | Data |
---|---|---|
4e8c8252 | 1 | /*** |
cbc06dcd | 2 | This file is part of systemd. |
4e8c8252 | 3 | |
8041b5ba | 4 | Copyright 2008-2011 Lennart Poettering |
4e8c8252 | 5 | |
cbc06dcd TG |
6 | systemd is free software; you can redistribute it and/or modify it |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
4e8c8252 | 10 | |
cbc06dcd TG |
11 | systemd is distributed in the hope that it will be useful, but |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
8041b5ba LP |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 | Lesser General Public License for more details. | |
4e8c8252 | 15 | |
cbc06dcd TG |
16 | You should have received a copy of the GNU Lesser General Public License |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
4e8c8252 | 18 | ***/ |
6b21f0cf | 19 | |
6b21f0cf | 20 | #include <errno.h> |
4e8c8252 | 21 | #include <net/if.h> |
07630cea LP |
22 | #include <netdb.h> |
23 | #include <nss.h> | |
8041b5ba | 24 | #include <stdlib.h> |
07630cea | 25 | #include <string.h> |
8041b5ba | 26 | |
b5efdb8a | 27 | #include "alloc-util.h" |
07630cea | 28 | #include "hostname-util.h" |
e80af1bd | 29 | #include "local-addresses.h" |
1c633045 | 30 | #include "macro.h" |
c9fdc26e | 31 | #include "nss-util.h" |
0c5eb056 | 32 | #include "signal-util.h" |
07630cea | 33 | #include "string-util.h" |
c9fdc26e | 34 | #include "util.h" |
4e8c8252 LP |
35 | |
36 | /* We use 127.0.0.2 as IPv4 address. This has the advantage over | |
37 | * 127.0.0.1 that it can be translated back to the local hostname. For | |
38 | * IPv6 we use ::1 which unfortunately will not translate back to the | |
3fdcecc8 | 39 | * hostname but instead something like "localhost" or so. */ |
4e8c8252 | 40 | |
8e38570e | 41 | #define LOCALADDRESS_IPV4 (htobe32(0x7F000002)) |
4e8c8252 | 42 | #define LOCALADDRESS_IPV6 &in6addr_loopback |
4e8c8252 | 43 | |
c9fdc26e LP |
44 | NSS_GETHOSTBYNAME_PROTOTYPES(myhostname); |
45 | NSS_GETHOSTBYADDR_PROTOTYPES(myhostname); | |
8041b5ba | 46 | |
4e8c8252 LP |
47 | enum nss_status _nss_myhostname_gethostbyname4_r( |
48 | const char *name, | |
49 | struct gaih_addrtuple **pat, | |
50 | char *buffer, size_t buflen, | |
51 | int *errnop, int *h_errnop, | |
52 | int32_t *ttlp) { | |
53 | ||
8041b5ba | 54 | struct gaih_addrtuple *r_tuple, *r_tuple_prev = NULL; |
e80af1bd | 55 | _cleanup_free_ struct local_address *addresses = NULL; |
5502f0d9 LP |
56 | _cleanup_free_ char *hn = NULL; |
57 | const char *canonical = NULL; | |
a1077c84 | 58 | int n_addresses = 0; |
e8a7a315 | 59 | uint32_t local_address_ipv4; |
e80af1bd | 60 | struct local_address *a; |
5502f0d9 LP |
61 | size_t l, idx, ms; |
62 | char *r_name; | |
e80af1bd | 63 | unsigned n; |
4e8c8252 | 64 | |
0c5eb056 LP |
65 | BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); |
66 | ||
5502f0d9 LP |
67 | assert(name); |
68 | assert(pat); | |
69 | assert(buffer); | |
70 | assert(errnop); | |
71 | assert(h_errnop); | |
72 | ||
73 | if (is_localhost(name)) { | |
e8a7a315 LP |
74 | /* We respond to 'localhost', so that /etc/hosts |
75 | * is optional */ | |
4e8c8252 | 76 | |
e8a7a315 | 77 | canonical = "localhost"; |
8e38570e | 78 | local_address_ipv4 = htobe32(INADDR_LOOPBACK); |
e9140aff | 79 | |
46a5e0e7 | 80 | } else if (is_gateway_hostname(name)) { |
e9140aff | 81 | |
1d050e1e | 82 | n_addresses = local_gateways(NULL, 0, AF_UNSPEC, &addresses); |
e9140aff LP |
83 | if (n_addresses <= 0) { |
84 | *errnop = ENOENT; | |
85 | *h_errnop = HOST_NOT_FOUND; | |
86 | return NSS_STATUS_NOTFOUND; | |
87 | } | |
88 | ||
5248e7e1 | 89 | canonical = "_gateway"; |
e9140aff | 90 | |
e8a7a315 | 91 | } else { |
5502f0d9 LP |
92 | hn = gethostname_malloc(); |
93 | if (!hn) { | |
94 | *errnop = ENOMEM; | |
e8a7a315 | 95 | *h_errnop = NO_RECOVERY; |
5502f0d9 | 96 | return NSS_STATUS_TRYAGAIN; |
e8a7a315 LP |
97 | } |
98 | ||
61233823 | 99 | /* We respond to our local host name, our hostname suffixed with a single dot. */ |
5502f0d9 | 100 | if (!streq(name, hn) && !streq_ptr(startswith(name, hn), ".")) { |
e8a7a315 LP |
101 | *errnop = ENOENT; |
102 | *h_errnop = HOST_NOT_FOUND; | |
103 | return NSS_STATUS_NOTFOUND; | |
104 | } | |
105 | ||
1d050e1e | 106 | n_addresses = local_addresses(NULL, 0, AF_UNSPEC, &addresses); |
e80af1bd LP |
107 | if (n_addresses < 0) |
108 | n_addresses = 0; | |
e8a7a315 LP |
109 | |
110 | canonical = hn; | |
111 | local_address_ipv4 = LOCALADDRESS_IPV4; | |
112 | } | |
8041b5ba | 113 | |
e8a7a315 | 114 | l = strlen(canonical); |
5502f0d9 | 115 | ms = ALIGN(l+1) + ALIGN(sizeof(struct gaih_addrtuple)) * (n_addresses > 0 ? n_addresses : 2); |
4e8c8252 | 116 | if (buflen < ms) { |
cda458a5 LP |
117 | *errnop = ERANGE; |
118 | *h_errnop = NETDB_INTERNAL; | |
4e8c8252 LP |
119 | return NSS_STATUS_TRYAGAIN; |
120 | } | |
121 | ||
122 | /* First, fill in hostname */ | |
123 | r_name = buffer; | |
e8a7a315 | 124 | memcpy(r_name, canonical, l+1); |
4e8c8252 LP |
125 | idx = ALIGN(l+1); |
126 | ||
68a9c7c4 ZJS |
127 | assert(n_addresses >= 0); |
128 | if (n_addresses == 0) { | |
8041b5ba LP |
129 | /* Second, fill in IPv6 tuple */ |
130 | r_tuple = (struct gaih_addrtuple*) (buffer + idx); | |
131 | r_tuple->next = r_tuple_prev; | |
132 | r_tuple->name = r_name; | |
133 | r_tuple->family = AF_INET6; | |
134 | memcpy(r_tuple->addr, LOCALADDRESS_IPV6, 16); | |
a1077c84 | 135 | r_tuple->scopeid = 0; |
8041b5ba LP |
136 | |
137 | idx += ALIGN(sizeof(struct gaih_addrtuple)); | |
138 | r_tuple_prev = r_tuple; | |
139 | ||
140 | /* Third, fill in IPv4 tuple */ | |
141 | r_tuple = (struct gaih_addrtuple*) (buffer + idx); | |
142 | r_tuple->next = r_tuple_prev; | |
143 | r_tuple->name = r_name; | |
144 | r_tuple->family = AF_INET; | |
e8a7a315 | 145 | *(uint32_t*) r_tuple->addr = local_address_ipv4; |
a1077c84 | 146 | r_tuple->scopeid = 0; |
8041b5ba LP |
147 | |
148 | idx += ALIGN(sizeof(struct gaih_addrtuple)); | |
149 | r_tuple_prev = r_tuple; | |
150 | } | |
151 | ||
152 | /* Fourth, fill actual addresses in, but in backwards order */ | |
e80af1bd | 153 | for (a = addresses + n_addresses - 1, n = 0; (int) n < n_addresses; n++, a--) { |
8041b5ba LP |
154 | r_tuple = (struct gaih_addrtuple*) (buffer + idx); |
155 | r_tuple->next = r_tuple_prev; | |
156 | r_tuple->name = r_name; | |
157 | r_tuple->family = a->family; | |
a1077c84 | 158 | r_tuple->scopeid = a->family == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&a->address.in6) ? a->ifindex : 0; |
5502f0d9 | 159 | memcpy(r_tuple->addr, &a->address, 16); |
8041b5ba LP |
160 | |
161 | idx += ALIGN(sizeof(struct gaih_addrtuple)); | |
162 | r_tuple_prev = r_tuple; | |
163 | } | |
4e8c8252 LP |
164 | |
165 | /* Verify the size matches */ | |
166 | assert(idx == ms); | |
167 | ||
d2f1f23a ED |
168 | /* Nscd expects us to store the first record in **pat. */ |
169 | if (*pat) | |
170 | **pat = *r_tuple_prev; | |
171 | else | |
172 | *pat = r_tuple_prev; | |
4e8c8252 LP |
173 | |
174 | if (ttlp) | |
175 | *ttlp = 0; | |
176 | ||
e70df46b LP |
177 | /* Explicitly reset all error variables */ |
178 | *errnop = 0; | |
179 | *h_errnop = NETDB_SUCCESS; | |
180 | h_errno = 0; | |
181 | ||
4e8c8252 LP |
182 | return NSS_STATUS_SUCCESS; |
183 | } | |
6b21f0cf LP |
184 | |
185 | static enum nss_status fill_in_hostent( | |
e8a7a315 | 186 | const char *canonical, const char *additional, |
4e8c8252 | 187 | int af, |
e80af1bd | 188 | struct local_address *addresses, unsigned n_addresses, |
e8a7a315 | 189 | uint32_t local_address_ipv4, |
4e8c8252 LP |
190 | struct hostent *result, |
191 | char *buffer, size_t buflen, | |
192 | int *errnop, int *h_errnop, | |
193 | int32_t *ttlp, | |
194 | char **canonp) { | |
195 | ||
d4c9895d | 196 | size_t l_canonical, l_additional, idx, ms, alen; |
e8a7a315 | 197 | char *r_addr, *r_name, *r_aliases, *r_alias = NULL, *r_addr_list; |
e80af1bd | 198 | struct local_address *a; |
e8a7a315 | 199 | unsigned n, c; |
8041b5ba | 200 | |
5502f0d9 LP |
201 | assert(canonical); |
202 | assert(result); | |
203 | assert(buffer); | |
204 | assert(errnop); | |
205 | assert(h_errnop); | |
206 | ||
9d485985 | 207 | alen = FAMILY_ADDRESS_SIZE(af); |
8041b5ba | 208 | |
8041b5ba LP |
209 | for (a = addresses, n = 0, c = 0; n < n_addresses; a++, n++) |
210 | if (af == a->family) | |
211 | c++; | |
4e8c8252 | 212 | |
e8a7a315 | 213 | l_canonical = strlen(canonical); |
7bf7ce28 | 214 | l_additional = strlen_ptr(additional); |
e8a7a315 LP |
215 | ms = ALIGN(l_canonical+1)+ |
216 | (additional ? ALIGN(l_additional+1) : 0) + | |
5502f0d9 | 217 | sizeof(char*) + |
e8a7a315 | 218 | (additional ? sizeof(char*) : 0) + |
d4c9895d | 219 | (c > 0 ? c : 1) * ALIGN(alen) + |
5502f0d9 | 220 | (c > 0 ? c+1 : 2) * sizeof(char*); |
8041b5ba | 221 | |
4e8c8252 | 222 | if (buflen < ms) { |
cda458a5 LP |
223 | *errnop = ERANGE; |
224 | *h_errnop = NETDB_INTERNAL; | |
4e8c8252 LP |
225 | return NSS_STATUS_TRYAGAIN; |
226 | } | |
227 | ||
e8a7a315 | 228 | /* First, fill in hostnames */ |
4e8c8252 | 229 | r_name = buffer; |
e8a7a315 LP |
230 | memcpy(r_name, canonical, l_canonical+1); |
231 | idx = ALIGN(l_canonical+1); | |
4e8c8252 | 232 | |
e8a7a315 LP |
233 | if (additional) { |
234 | r_alias = buffer + idx; | |
235 | memcpy(r_alias, additional, l_additional+1); | |
236 | idx += ALIGN(l_additional+1); | |
237 | } | |
238 | ||
239 | /* Second, create aliases array */ | |
4e8c8252 | 240 | r_aliases = buffer + idx; |
e8a7a315 LP |
241 | if (additional) { |
242 | ((char**) r_aliases)[0] = r_alias; | |
243 | ((char**) r_aliases)[1] = NULL; | |
244 | idx += 2*sizeof(char*); | |
245 | } else { | |
246 | ((char**) r_aliases)[0] = NULL; | |
247 | idx += sizeof(char*); | |
248 | } | |
4e8c8252 | 249 | |
8041b5ba | 250 | /* Third, add addresses */ |
4e8c8252 | 251 | r_addr = buffer + idx; |
8041b5ba LP |
252 | if (c > 0) { |
253 | unsigned i = 0; | |
254 | ||
255 | for (a = addresses, n = 0; n < n_addresses; a++, n++) { | |
256 | if (af != a->family) | |
257 | continue; | |
258 | ||
5502f0d9 | 259 | memcpy(r_addr + i*ALIGN(alen), &a->address, alen); |
8041b5ba LP |
260 | i++; |
261 | } | |
262 | ||
263 | assert(i == c); | |
264 | idx += c*ALIGN(alen); | |
265 | } else { | |
266 | if (af == AF_INET) | |
e8a7a315 | 267 | *(uint32_t*) r_addr = local_address_ipv4; |
8041b5ba LP |
268 | else |
269 | memcpy(r_addr, LOCALADDRESS_IPV6, 16); | |
270 | ||
271 | idx += ALIGN(alen); | |
272 | } | |
4e8c8252 LP |
273 | |
274 | /* Fourth, add address pointer array */ | |
275 | r_addr_list = buffer + idx; | |
8041b5ba | 276 | if (c > 0) { |
d4c9895d | 277 | unsigned i; |
8041b5ba | 278 | |
d4c9895d LP |
279 | for (i = 0; i < c; i++) |
280 | ((char**) r_addr_list)[i] = r_addr + i*ALIGN(alen); | |
8041b5ba | 281 | |
d4c9895d LP |
282 | ((char**) r_addr_list)[i] = NULL; |
283 | idx += (c+1) * sizeof(char*); | |
8041b5ba LP |
284 | |
285 | } else { | |
286 | ((char**) r_addr_list)[0] = r_addr; | |
287 | ((char**) r_addr_list)[1] = NULL; | |
d4c9895d | 288 | idx += 2 * sizeof(char*); |
8041b5ba | 289 | } |
4e8c8252 LP |
290 | |
291 | /* Verify the size matches */ | |
292 | assert(idx == ms); | |
293 | ||
294 | result->h_name = r_name; | |
295 | result->h_aliases = (char**) r_aliases; | |
296 | result->h_addrtype = af; | |
297 | result->h_length = alen; | |
298 | result->h_addr_list = (char**) r_addr_list; | |
299 | ||
300 | if (ttlp) | |
301 | *ttlp = 0; | |
302 | ||
303 | if (canonp) | |
304 | *canonp = r_name; | |
305 | ||
e70df46b LP |
306 | /* Explicitly reset all error variables */ |
307 | *errnop = 0; | |
308 | *h_errnop = NETDB_SUCCESS; | |
309 | h_errno = 0; | |
310 | ||
4e8c8252 | 311 | return NSS_STATUS_SUCCESS; |
6b21f0cf LP |
312 | } |
313 | ||
4e8c8252 LP |
314 | enum nss_status _nss_myhostname_gethostbyname3_r( |
315 | const char *name, | |
316 | int af, | |
317 | struct hostent *host, | |
318 | char *buffer, size_t buflen, | |
319 | int *errnop, int *h_errnop, | |
320 | int32_t *ttlp, | |
321 | char **canonp) { | |
6b21f0cf | 322 | |
e80af1bd | 323 | _cleanup_free_ struct local_address *addresses = NULL; |
e8a7a315 | 324 | const char *canonical, *additional = NULL; |
5502f0d9 | 325 | _cleanup_free_ char *hn = NULL; |
e9140aff | 326 | uint32_t local_address_ipv4 = 0; |
e80af1bd | 327 | int n_addresses = 0; |
5502f0d9 | 328 | |
0c5eb056 LP |
329 | BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); |
330 | ||
5502f0d9 LP |
331 | assert(name); |
332 | assert(host); | |
333 | assert(buffer); | |
334 | assert(errnop); | |
335 | assert(h_errnop); | |
6b21f0cf | 336 | |
4e8c8252 LP |
337 | if (af == AF_UNSPEC) |
338 | af = AF_INET; | |
6b21f0cf | 339 | |
ec2ce0c5 | 340 | if (!IN_SET(af, AF_INET, AF_INET6)) { |
4e8c8252 LP |
341 | *errnop = EAFNOSUPPORT; |
342 | *h_errnop = NO_DATA; | |
343 | return NSS_STATUS_UNAVAIL; | |
344 | } | |
6b21f0cf | 345 | |
5502f0d9 | 346 | if (is_localhost(name)) { |
e8a7a315 | 347 | canonical = "localhost"; |
8e38570e | 348 | local_address_ipv4 = htobe32(INADDR_LOOPBACK); |
e9140aff | 349 | |
46a5e0e7 | 350 | } else if (is_gateway_hostname(name)) { |
e9140aff | 351 | |
1d050e1e | 352 | n_addresses = local_gateways(NULL, 0, af, &addresses); |
e9140aff LP |
353 | if (n_addresses <= 0) { |
354 | *errnop = ENOENT; | |
355 | *h_errnop = HOST_NOT_FOUND; | |
356 | return NSS_STATUS_NOTFOUND; | |
357 | } | |
358 | ||
5248e7e1 | 359 | canonical = "_gateway"; |
e9140aff | 360 | |
e8a7a315 | 361 | } else { |
5502f0d9 LP |
362 | hn = gethostname_malloc(); |
363 | if (!hn) { | |
364 | *errnop = ENOMEM; | |
e8a7a315 | 365 | *h_errnop = NO_RECOVERY; |
5502f0d9 | 366 | return NSS_STATUS_TRYAGAIN; |
e8a7a315 | 367 | } |
6b21f0cf | 368 | |
5502f0d9 | 369 | if (!streq(name, hn) && !streq_ptr(startswith(name, hn), ".")) { |
e8a7a315 LP |
370 | *errnop = ENOENT; |
371 | *h_errnop = HOST_NOT_FOUND; | |
372 | return NSS_STATUS_NOTFOUND; | |
373 | } | |
374 | ||
1d050e1e | 375 | n_addresses = local_addresses(NULL, 0, af, &addresses); |
e80af1bd LP |
376 | if (n_addresses < 0) |
377 | n_addresses = 0; | |
e8a7a315 LP |
378 | |
379 | canonical = hn; | |
380 | additional = n_addresses <= 0 && af == AF_INET6 ? "localhost" : NULL; | |
381 | local_address_ipv4 = LOCALADDRESS_IPV4; | |
4e8c8252 | 382 | } |
6b21f0cf | 383 | |
e8a7a315 LP |
384 | return fill_in_hostent( |
385 | canonical, additional, | |
386 | af, | |
387 | addresses, n_addresses, | |
388 | local_address_ipv4, | |
389 | host, | |
390 | buffer, buflen, | |
391 | errnop, h_errnop, | |
392 | ttlp, | |
393 | canonp); | |
4e8c8252 | 394 | } |
6b21f0cf | 395 | |
4e8c8252 LP |
396 | enum nss_status _nss_myhostname_gethostbyaddr2_r( |
397 | const void* addr, socklen_t len, | |
398 | int af, | |
399 | struct hostent *host, | |
400 | char *buffer, size_t buflen, | |
401 | int *errnop, int *h_errnop, | |
402 | int32_t *ttlp) { | |
6b21f0cf | 403 | |
e8a7a315 | 404 | const char *canonical = NULL, *additional = NULL; |
5502f0d9 | 405 | uint32_t local_address_ipv4 = LOCALADDRESS_IPV4; |
e80af1bd | 406 | _cleanup_free_ struct local_address *addresses = NULL; |
5502f0d9 | 407 | _cleanup_free_ char *hn = NULL; |
e80af1bd LP |
408 | int n_addresses = 0; |
409 | struct local_address *a; | |
3fdcecc8 | 410 | bool additional_from_hostname = false; |
e80af1bd | 411 | unsigned n; |
5502f0d9 | 412 | |
0c5eb056 LP |
413 | BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); |
414 | ||
5502f0d9 LP |
415 | assert(addr); |
416 | assert(host); | |
417 | assert(buffer); | |
418 | assert(errnop); | |
419 | assert(h_errnop); | |
8041b5ba | 420 | |
555bd6e9 LP |
421 | if (!IN_SET(af, AF_INET, AF_INET6)) { |
422 | *errnop = EAFNOSUPPORT; | |
423 | *h_errnop = NO_DATA; | |
424 | return NSS_STATUS_UNAVAIL; | |
425 | } | |
426 | ||
9d485985 | 427 | if (len != FAMILY_ADDRESS_SIZE(af)) { |
8041b5ba LP |
428 | *errnop = EINVAL; |
429 | *h_errnop = NO_RECOVERY; | |
430 | return NSS_STATUS_UNAVAIL; | |
431 | } | |
6b21f0cf | 432 | |
4e8c8252 | 433 | if (af == AF_INET) { |
8041b5ba LP |
434 | if ((*(uint32_t*) addr) == LOCALADDRESS_IPV4) |
435 | goto found; | |
6b21f0cf | 436 | |
8e38570e | 437 | if ((*(uint32_t*) addr) == htobe32(INADDR_LOOPBACK)) { |
e8a7a315 | 438 | canonical = "localhost"; |
8e38570e | 439 | local_address_ipv4 = htobe32(INADDR_LOOPBACK); |
e8a7a315 LP |
440 | goto found; |
441 | } | |
442 | ||
555bd6e9 LP |
443 | } else { |
444 | assert(af == AF_INET6); | |
8041b5ba | 445 | |
e8a7a315 | 446 | if (memcmp(addr, LOCALADDRESS_IPV6, 16) == 0) { |
3fdcecc8 LP |
447 | canonical = "localhost"; |
448 | additional_from_hostname = true; | |
8041b5ba | 449 | goto found; |
e8a7a315 | 450 | } |
4e8c8252 LP |
451 | } |
452 | ||
1d050e1e | 453 | n_addresses = local_addresses(NULL, 0, AF_UNSPEC, &addresses); |
68a9c7c4 ZJS |
454 | for (a = addresses, n = 0; (int) n < n_addresses; n++, a++) { |
455 | if (af != a->family) | |
456 | continue; | |
8041b5ba | 457 | |
68a9c7c4 ZJS |
458 | if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0) |
459 | goto found; | |
e9140aff LP |
460 | } |
461 | ||
97b11eed | 462 | addresses = mfree(addresses); |
e9140aff | 463 | |
1d050e1e | 464 | n_addresses = local_gateways(NULL, 0, AF_UNSPEC, &addresses); |
68a9c7c4 ZJS |
465 | for (a = addresses, n = 0; (int) n < n_addresses; n++, a++) { |
466 | if (af != a->family) | |
467 | continue; | |
e9140aff | 468 | |
68a9c7c4 | 469 | if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0) { |
5248e7e1 | 470 | canonical = "_gateway"; |
68a9c7c4 | 471 | goto found; |
e9140aff | 472 | } |
8041b5ba LP |
473 | } |
474 | ||
475 | *errnop = ENOENT; | |
476 | *h_errnop = HOST_NOT_FOUND; | |
8041b5ba LP |
477 | return NSS_STATUS_NOTFOUND; |
478 | ||
479 | found: | |
82e4c2d6 | 480 | if (!canonical || additional_from_hostname) { |
3fdcecc8 LP |
481 | hn = gethostname_malloc(); |
482 | if (!hn) { | |
483 | *errnop = ENOMEM; | |
484 | *h_errnop = NO_RECOVERY; | |
485 | return NSS_STATUS_TRYAGAIN; | |
486 | } | |
487 | ||
488 | if (!canonical) | |
489 | canonical = hn; | |
82e4c2d6 | 490 | else |
3fdcecc8 LP |
491 | additional = hn; |
492 | } | |
4e8c8252 | 493 | |
e8a7a315 LP |
494 | return fill_in_hostent( |
495 | canonical, additional, | |
496 | af, | |
497 | addresses, n_addresses, | |
498 | local_address_ipv4, | |
499 | host, | |
500 | buffer, buflen, | |
501 | errnop, h_errnop, | |
502 | ttlp, | |
503 | NULL); | |
4e8c8252 | 504 | } |
6b21f0cf | 505 | |
c9fdc26e LP |
506 | NSS_GETHOSTBYNAME_FALLBACKS(myhostname); |
507 | NSS_GETHOSTBYADDR_FALLBACKS(myhostname); |