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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 LP |
40 | |
41 | #define LOCALADDRESS_IPV4 (htonl(0x7F000002)) | |
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; | |
e80af1bd | 58 | int n_addresses = 0, lo_ifi; |
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 LP |
77 | canonical = "localhost"; |
78 | local_address_ipv4 = htonl(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 | ||
89 | canonical = "gateway"; | |
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 | ||
5502f0d9 LP |
99 | /* We respond to our local host name, our our hostname suffixed with a single dot. */ |
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 | |
4e8c8252 | 114 | /* If this call fails we fill in 0 as scope. Which is fine */ |
f4324288 | 115 | lo_ifi = n_addresses <= 0 ? LOOPBACK_IFINDEX : 0; |
4e8c8252 | 116 | |
e8a7a315 | 117 | l = strlen(canonical); |
5502f0d9 | 118 | ms = ALIGN(l+1) + ALIGN(sizeof(struct gaih_addrtuple)) * (n_addresses > 0 ? n_addresses : 2); |
4e8c8252 LP |
119 | if (buflen < ms) { |
120 | *errnop = ENOMEM; | |
121 | *h_errnop = NO_RECOVERY; | |
122 | return NSS_STATUS_TRYAGAIN; | |
123 | } | |
124 | ||
125 | /* First, fill in hostname */ | |
126 | r_name = buffer; | |
e8a7a315 | 127 | memcpy(r_name, canonical, l+1); |
4e8c8252 LP |
128 | idx = ALIGN(l+1); |
129 | ||
68a9c7c4 ZJS |
130 | assert(n_addresses >= 0); |
131 | if (n_addresses == 0) { | |
8041b5ba LP |
132 | /* Second, fill in IPv6 tuple */ |
133 | r_tuple = (struct gaih_addrtuple*) (buffer + idx); | |
134 | r_tuple->next = r_tuple_prev; | |
135 | r_tuple->name = r_name; | |
136 | r_tuple->family = AF_INET6; | |
137 | memcpy(r_tuple->addr, LOCALADDRESS_IPV6, 16); | |
138 | r_tuple->scopeid = (uint32_t) lo_ifi; | |
139 | ||
140 | idx += ALIGN(sizeof(struct gaih_addrtuple)); | |
141 | r_tuple_prev = r_tuple; | |
142 | ||
143 | /* Third, fill in IPv4 tuple */ | |
144 | r_tuple = (struct gaih_addrtuple*) (buffer + idx); | |
145 | r_tuple->next = r_tuple_prev; | |
146 | r_tuple->name = r_name; | |
147 | r_tuple->family = AF_INET; | |
e8a7a315 | 148 | *(uint32_t*) r_tuple->addr = local_address_ipv4; |
8041b5ba LP |
149 | r_tuple->scopeid = (uint32_t) lo_ifi; |
150 | ||
151 | idx += ALIGN(sizeof(struct gaih_addrtuple)); | |
152 | r_tuple_prev = r_tuple; | |
153 | } | |
154 | ||
155 | /* Fourth, fill actual addresses in, but in backwards order */ | |
e80af1bd | 156 | for (a = addresses + n_addresses - 1, n = 0; (int) n < n_addresses; n++, a--) { |
8041b5ba LP |
157 | r_tuple = (struct gaih_addrtuple*) (buffer + idx); |
158 | r_tuple->next = r_tuple_prev; | |
159 | r_tuple->name = r_name; | |
160 | r_tuple->family = a->family; | |
161 | r_tuple->scopeid = a->ifindex; | |
5502f0d9 | 162 | memcpy(r_tuple->addr, &a->address, 16); |
8041b5ba LP |
163 | |
164 | idx += ALIGN(sizeof(struct gaih_addrtuple)); | |
165 | r_tuple_prev = r_tuple; | |
166 | } | |
4e8c8252 LP |
167 | |
168 | /* Verify the size matches */ | |
169 | assert(idx == ms); | |
170 | ||
d2f1f23a ED |
171 | /* Nscd expects us to store the first record in **pat. */ |
172 | if (*pat) | |
173 | **pat = *r_tuple_prev; | |
174 | else | |
175 | *pat = r_tuple_prev; | |
4e8c8252 LP |
176 | |
177 | if (ttlp) | |
178 | *ttlp = 0; | |
179 | ||
e70df46b LP |
180 | /* Explicitly reset all error variables */ |
181 | *errnop = 0; | |
182 | *h_errnop = NETDB_SUCCESS; | |
183 | h_errno = 0; | |
184 | ||
4e8c8252 LP |
185 | return NSS_STATUS_SUCCESS; |
186 | } | |
6b21f0cf LP |
187 | |
188 | static enum nss_status fill_in_hostent( | |
e8a7a315 | 189 | const char *canonical, const char *additional, |
4e8c8252 | 190 | int af, |
e80af1bd | 191 | struct local_address *addresses, unsigned n_addresses, |
e8a7a315 | 192 | uint32_t local_address_ipv4, |
4e8c8252 LP |
193 | struct hostent *result, |
194 | char *buffer, size_t buflen, | |
195 | int *errnop, int *h_errnop, | |
196 | int32_t *ttlp, | |
197 | char **canonp) { | |
198 | ||
d4c9895d | 199 | size_t l_canonical, l_additional, idx, ms, alen; |
e8a7a315 | 200 | char *r_addr, *r_name, *r_aliases, *r_alias = NULL, *r_addr_list; |
e80af1bd | 201 | struct local_address *a; |
e8a7a315 | 202 | unsigned n, c; |
8041b5ba | 203 | |
5502f0d9 LP |
204 | assert(canonical); |
205 | assert(result); | |
206 | assert(buffer); | |
207 | assert(errnop); | |
208 | assert(h_errnop); | |
209 | ||
9d485985 | 210 | alen = FAMILY_ADDRESS_SIZE(af); |
8041b5ba | 211 | |
8041b5ba LP |
212 | for (a = addresses, n = 0, c = 0; n < n_addresses; a++, n++) |
213 | if (af == a->family) | |
214 | c++; | |
4e8c8252 | 215 | |
e8a7a315 LP |
216 | l_canonical = strlen(canonical); |
217 | l_additional = additional ? strlen(additional) : 0; | |
218 | ms = ALIGN(l_canonical+1)+ | |
219 | (additional ? ALIGN(l_additional+1) : 0) + | |
5502f0d9 | 220 | sizeof(char*) + |
e8a7a315 | 221 | (additional ? sizeof(char*) : 0) + |
d4c9895d | 222 | (c > 0 ? c : 1) * ALIGN(alen) + |
5502f0d9 | 223 | (c > 0 ? c+1 : 2) * sizeof(char*); |
8041b5ba | 224 | |
4e8c8252 LP |
225 | if (buflen < ms) { |
226 | *errnop = ENOMEM; | |
227 | *h_errnop = NO_RECOVERY; | |
228 | return NSS_STATUS_TRYAGAIN; | |
229 | } | |
230 | ||
e8a7a315 | 231 | /* First, fill in hostnames */ |
4e8c8252 | 232 | r_name = buffer; |
e8a7a315 LP |
233 | memcpy(r_name, canonical, l_canonical+1); |
234 | idx = ALIGN(l_canonical+1); | |
4e8c8252 | 235 | |
e8a7a315 LP |
236 | if (additional) { |
237 | r_alias = buffer + idx; | |
238 | memcpy(r_alias, additional, l_additional+1); | |
239 | idx += ALIGN(l_additional+1); | |
240 | } | |
241 | ||
242 | /* Second, create aliases array */ | |
4e8c8252 | 243 | r_aliases = buffer + idx; |
e8a7a315 LP |
244 | if (additional) { |
245 | ((char**) r_aliases)[0] = r_alias; | |
246 | ((char**) r_aliases)[1] = NULL; | |
247 | idx += 2*sizeof(char*); | |
248 | } else { | |
249 | ((char**) r_aliases)[0] = NULL; | |
250 | idx += sizeof(char*); | |
251 | } | |
4e8c8252 | 252 | |
8041b5ba | 253 | /* Third, add addresses */ |
4e8c8252 | 254 | r_addr = buffer + idx; |
8041b5ba LP |
255 | if (c > 0) { |
256 | unsigned i = 0; | |
257 | ||
258 | for (a = addresses, n = 0; n < n_addresses; a++, n++) { | |
259 | if (af != a->family) | |
260 | continue; | |
261 | ||
5502f0d9 | 262 | memcpy(r_addr + i*ALIGN(alen), &a->address, alen); |
8041b5ba LP |
263 | i++; |
264 | } | |
265 | ||
266 | assert(i == c); | |
267 | idx += c*ALIGN(alen); | |
268 | } else { | |
269 | if (af == AF_INET) | |
e8a7a315 | 270 | *(uint32_t*) r_addr = local_address_ipv4; |
8041b5ba LP |
271 | else |
272 | memcpy(r_addr, LOCALADDRESS_IPV6, 16); | |
273 | ||
274 | idx += ALIGN(alen); | |
275 | } | |
4e8c8252 LP |
276 | |
277 | /* Fourth, add address pointer array */ | |
278 | r_addr_list = buffer + idx; | |
8041b5ba | 279 | if (c > 0) { |
d4c9895d | 280 | unsigned i; |
8041b5ba | 281 | |
d4c9895d LP |
282 | for (i = 0; i < c; i++) |
283 | ((char**) r_addr_list)[i] = r_addr + i*ALIGN(alen); | |
8041b5ba | 284 | |
d4c9895d LP |
285 | ((char**) r_addr_list)[i] = NULL; |
286 | idx += (c+1) * sizeof(char*); | |
8041b5ba LP |
287 | |
288 | } else { | |
289 | ((char**) r_addr_list)[0] = r_addr; | |
290 | ((char**) r_addr_list)[1] = NULL; | |
d4c9895d | 291 | idx += 2 * sizeof(char*); |
8041b5ba | 292 | } |
4e8c8252 LP |
293 | |
294 | /* Verify the size matches */ | |
295 | assert(idx == ms); | |
296 | ||
297 | result->h_name = r_name; | |
298 | result->h_aliases = (char**) r_aliases; | |
299 | result->h_addrtype = af; | |
300 | result->h_length = alen; | |
301 | result->h_addr_list = (char**) r_addr_list; | |
302 | ||
303 | if (ttlp) | |
304 | *ttlp = 0; | |
305 | ||
306 | if (canonp) | |
307 | *canonp = r_name; | |
308 | ||
e70df46b LP |
309 | /* Explicitly reset all error variables */ |
310 | *errnop = 0; | |
311 | *h_errnop = NETDB_SUCCESS; | |
312 | h_errno = 0; | |
313 | ||
4e8c8252 | 314 | return NSS_STATUS_SUCCESS; |
6b21f0cf LP |
315 | } |
316 | ||
4e8c8252 LP |
317 | enum nss_status _nss_myhostname_gethostbyname3_r( |
318 | const char *name, | |
319 | int af, | |
320 | struct hostent *host, | |
321 | char *buffer, size_t buflen, | |
322 | int *errnop, int *h_errnop, | |
323 | int32_t *ttlp, | |
324 | char **canonp) { | |
6b21f0cf | 325 | |
e80af1bd | 326 | _cleanup_free_ struct local_address *addresses = NULL; |
e8a7a315 | 327 | const char *canonical, *additional = NULL; |
5502f0d9 | 328 | _cleanup_free_ char *hn = NULL; |
e9140aff | 329 | uint32_t local_address_ipv4 = 0; |
e80af1bd | 330 | int n_addresses = 0; |
5502f0d9 | 331 | |
0c5eb056 LP |
332 | BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); |
333 | ||
5502f0d9 LP |
334 | assert(name); |
335 | assert(host); | |
336 | assert(buffer); | |
337 | assert(errnop); | |
338 | assert(h_errnop); | |
6b21f0cf | 339 | |
4e8c8252 LP |
340 | if (af == AF_UNSPEC) |
341 | af = AF_INET; | |
6b21f0cf | 342 | |
4e8c8252 LP |
343 | if (af != AF_INET && af != AF_INET6) { |
344 | *errnop = EAFNOSUPPORT; | |
345 | *h_errnop = NO_DATA; | |
346 | return NSS_STATUS_UNAVAIL; | |
347 | } | |
6b21f0cf | 348 | |
5502f0d9 | 349 | if (is_localhost(name)) { |
e8a7a315 LP |
350 | canonical = "localhost"; |
351 | local_address_ipv4 = htonl(INADDR_LOOPBACK); | |
e9140aff | 352 | |
46a5e0e7 | 353 | } else if (is_gateway_hostname(name)) { |
e9140aff | 354 | |
1d050e1e | 355 | n_addresses = local_gateways(NULL, 0, af, &addresses); |
e9140aff LP |
356 | if (n_addresses <= 0) { |
357 | *errnop = ENOENT; | |
358 | *h_errnop = HOST_NOT_FOUND; | |
359 | return NSS_STATUS_NOTFOUND; | |
360 | } | |
361 | ||
362 | canonical = "gateway"; | |
363 | ||
e8a7a315 | 364 | } else { |
5502f0d9 LP |
365 | hn = gethostname_malloc(); |
366 | if (!hn) { | |
367 | *errnop = ENOMEM; | |
e8a7a315 | 368 | *h_errnop = NO_RECOVERY; |
5502f0d9 | 369 | return NSS_STATUS_TRYAGAIN; |
e8a7a315 | 370 | } |
6b21f0cf | 371 | |
5502f0d9 | 372 | if (!streq(name, hn) && !streq_ptr(startswith(name, hn), ".")) { |
e8a7a315 LP |
373 | *errnop = ENOENT; |
374 | *h_errnop = HOST_NOT_FOUND; | |
375 | return NSS_STATUS_NOTFOUND; | |
376 | } | |
377 | ||
1d050e1e | 378 | n_addresses = local_addresses(NULL, 0, af, &addresses); |
e80af1bd LP |
379 | if (n_addresses < 0) |
380 | n_addresses = 0; | |
e8a7a315 LP |
381 | |
382 | canonical = hn; | |
383 | additional = n_addresses <= 0 && af == AF_INET6 ? "localhost" : NULL; | |
384 | local_address_ipv4 = LOCALADDRESS_IPV4; | |
4e8c8252 | 385 | } |
6b21f0cf | 386 | |
e8a7a315 LP |
387 | return fill_in_hostent( |
388 | canonical, additional, | |
389 | af, | |
390 | addresses, n_addresses, | |
391 | local_address_ipv4, | |
392 | host, | |
393 | buffer, buflen, | |
394 | errnop, h_errnop, | |
395 | ttlp, | |
396 | canonp); | |
4e8c8252 | 397 | } |
6b21f0cf | 398 | |
4e8c8252 LP |
399 | enum nss_status _nss_myhostname_gethostbyaddr2_r( |
400 | const void* addr, socklen_t len, | |
401 | int af, | |
402 | struct hostent *host, | |
403 | char *buffer, size_t buflen, | |
404 | int *errnop, int *h_errnop, | |
405 | int32_t *ttlp) { | |
6b21f0cf | 406 | |
e8a7a315 | 407 | const char *canonical = NULL, *additional = NULL; |
5502f0d9 | 408 | uint32_t local_address_ipv4 = LOCALADDRESS_IPV4; |
e80af1bd | 409 | _cleanup_free_ struct local_address *addresses = NULL; |
5502f0d9 | 410 | _cleanup_free_ char *hn = NULL; |
e80af1bd LP |
411 | int n_addresses = 0; |
412 | struct local_address *a; | |
3fdcecc8 | 413 | bool additional_from_hostname = false; |
e80af1bd | 414 | unsigned n; |
5502f0d9 | 415 | |
0c5eb056 LP |
416 | BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); |
417 | ||
5502f0d9 LP |
418 | assert(addr); |
419 | assert(host); | |
420 | assert(buffer); | |
421 | assert(errnop); | |
422 | assert(h_errnop); | |
8041b5ba | 423 | |
555bd6e9 LP |
424 | if (!IN_SET(af, AF_INET, AF_INET6)) { |
425 | *errnop = EAFNOSUPPORT; | |
426 | *h_errnop = NO_DATA; | |
427 | return NSS_STATUS_UNAVAIL; | |
428 | } | |
429 | ||
9d485985 | 430 | if (len != FAMILY_ADDRESS_SIZE(af)) { |
8041b5ba LP |
431 | *errnop = EINVAL; |
432 | *h_errnop = NO_RECOVERY; | |
433 | return NSS_STATUS_UNAVAIL; | |
434 | } | |
6b21f0cf | 435 | |
4e8c8252 | 436 | if (af == AF_INET) { |
8041b5ba LP |
437 | if ((*(uint32_t*) addr) == LOCALADDRESS_IPV4) |
438 | goto found; | |
6b21f0cf | 439 | |
e8a7a315 LP |
440 | if ((*(uint32_t*) addr) == htonl(INADDR_LOOPBACK)) { |
441 | canonical = "localhost"; | |
442 | local_address_ipv4 = htonl(INADDR_LOOPBACK); | |
443 | goto found; | |
444 | } | |
445 | ||
555bd6e9 LP |
446 | } else { |
447 | assert(af == AF_INET6); | |
8041b5ba | 448 | |
e8a7a315 | 449 | if (memcmp(addr, LOCALADDRESS_IPV6, 16) == 0) { |
3fdcecc8 LP |
450 | canonical = "localhost"; |
451 | additional_from_hostname = true; | |
8041b5ba | 452 | goto found; |
e8a7a315 | 453 | } |
4e8c8252 LP |
454 | } |
455 | ||
1d050e1e | 456 | n_addresses = local_addresses(NULL, 0, AF_UNSPEC, &addresses); |
68a9c7c4 ZJS |
457 | for (a = addresses, n = 0; (int) n < n_addresses; n++, a++) { |
458 | if (af != a->family) | |
459 | continue; | |
8041b5ba | 460 | |
68a9c7c4 ZJS |
461 | if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0) |
462 | goto found; | |
e9140aff LP |
463 | } |
464 | ||
97b11eed | 465 | addresses = mfree(addresses); |
e9140aff | 466 | |
1d050e1e | 467 | n_addresses = local_gateways(NULL, 0, AF_UNSPEC, &addresses); |
68a9c7c4 ZJS |
468 | for (a = addresses, n = 0; (int) n < n_addresses; n++, a++) { |
469 | if (af != a->family) | |
470 | continue; | |
e9140aff | 471 | |
68a9c7c4 ZJS |
472 | if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0) { |
473 | canonical = "gateway"; | |
474 | goto found; | |
e9140aff | 475 | } |
8041b5ba LP |
476 | } |
477 | ||
478 | *errnop = ENOENT; | |
479 | *h_errnop = HOST_NOT_FOUND; | |
8041b5ba LP |
480 | return NSS_STATUS_NOTFOUND; |
481 | ||
482 | found: | |
82e4c2d6 | 483 | if (!canonical || additional_from_hostname) { |
3fdcecc8 LP |
484 | hn = gethostname_malloc(); |
485 | if (!hn) { | |
486 | *errnop = ENOMEM; | |
487 | *h_errnop = NO_RECOVERY; | |
488 | return NSS_STATUS_TRYAGAIN; | |
489 | } | |
490 | ||
491 | if (!canonical) | |
492 | canonical = hn; | |
82e4c2d6 | 493 | else |
3fdcecc8 LP |
494 | additional = hn; |
495 | } | |
4e8c8252 | 496 | |
e8a7a315 LP |
497 | return fill_in_hostent( |
498 | canonical, additional, | |
499 | af, | |
500 | addresses, n_addresses, | |
501 | local_address_ipv4, | |
502 | host, | |
503 | buffer, buflen, | |
504 | errnop, h_errnop, | |
505 | ttlp, | |
506 | NULL); | |
4e8c8252 | 507 | } |
6b21f0cf | 508 | |
c9fdc26e LP |
509 | NSS_GETHOSTBYNAME_FALLBACKS(myhostname); |
510 | NSS_GETHOSTBYADDR_FALLBACKS(myhostname); |