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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
6b21f0cf | 2 | |
6b21f0cf | 3 | #include <errno.h> |
4e8c8252 | 4 | #include <net/if.h> |
07630cea LP |
5 | #include <netdb.h> |
6 | #include <nss.h> | |
8041b5ba | 7 | #include <stdlib.h> |
07630cea | 8 | #include <string.h> |
8041b5ba | 9 | |
b5efdb8a | 10 | #include "alloc-util.h" |
07630cea | 11 | #include "hostname-util.h" |
e80af1bd | 12 | #include "local-addresses.h" |
1c633045 | 13 | #include "macro.h" |
c9fdc26e | 14 | #include "nss-util.h" |
0c5eb056 | 15 | #include "signal-util.h" |
07630cea | 16 | #include "string-util.h" |
c9fdc26e | 17 | #include "util.h" |
4e8c8252 LP |
18 | |
19 | /* We use 127.0.0.2 as IPv4 address. This has the advantage over | |
20 | * 127.0.0.1 that it can be translated back to the local hostname. For | |
21 | * IPv6 we use ::1 which unfortunately will not translate back to the | |
3fdcecc8 | 22 | * hostname but instead something like "localhost" or so. */ |
4e8c8252 | 23 | |
8e38570e | 24 | #define LOCALADDRESS_IPV4 (htobe32(0x7F000002)) |
4e8c8252 | 25 | #define LOCALADDRESS_IPV6 &in6addr_loopback |
4e8c8252 | 26 | |
c9fdc26e LP |
27 | NSS_GETHOSTBYNAME_PROTOTYPES(myhostname); |
28 | NSS_GETHOSTBYADDR_PROTOTYPES(myhostname); | |
8041b5ba | 29 | |
4e8c8252 LP |
30 | enum nss_status _nss_myhostname_gethostbyname4_r( |
31 | const char *name, | |
32 | struct gaih_addrtuple **pat, | |
33 | char *buffer, size_t buflen, | |
34 | int *errnop, int *h_errnop, | |
35 | int32_t *ttlp) { | |
36 | ||
8041b5ba | 37 | struct gaih_addrtuple *r_tuple, *r_tuple_prev = NULL; |
e80af1bd | 38 | _cleanup_free_ struct local_address *addresses = NULL; |
5502f0d9 LP |
39 | _cleanup_free_ char *hn = NULL; |
40 | const char *canonical = NULL; | |
a1077c84 | 41 | int n_addresses = 0; |
e8a7a315 | 42 | uint32_t local_address_ipv4; |
e80af1bd | 43 | struct local_address *a; |
5502f0d9 LP |
44 | size_t l, idx, ms; |
45 | char *r_name; | |
e80af1bd | 46 | unsigned n; |
4e8c8252 | 47 | |
06202b9e | 48 | PROTECT_ERRNO; |
0c5eb056 LP |
49 | BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); |
50 | ||
5502f0d9 LP |
51 | assert(name); |
52 | assert(pat); | |
53 | assert(buffer); | |
54 | assert(errnop); | |
55 | assert(h_errnop); | |
56 | ||
57 | if (is_localhost(name)) { | |
e8a7a315 LP |
58 | /* We respond to 'localhost', so that /etc/hosts |
59 | * is optional */ | |
4e8c8252 | 60 | |
e8a7a315 | 61 | canonical = "localhost"; |
8e38570e | 62 | local_address_ipv4 = htobe32(INADDR_LOOPBACK); |
e9140aff | 63 | |
46a5e0e7 | 64 | } else if (is_gateway_hostname(name)) { |
e9140aff | 65 | |
1d050e1e | 66 | n_addresses = local_gateways(NULL, 0, AF_UNSPEC, &addresses); |
e9140aff | 67 | if (n_addresses <= 0) { |
e9140aff LP |
68 | *h_errnop = HOST_NOT_FOUND; |
69 | return NSS_STATUS_NOTFOUND; | |
70 | } | |
71 | ||
5248e7e1 | 72 | canonical = "_gateway"; |
e9140aff | 73 | |
e8a7a315 | 74 | } else { |
5502f0d9 LP |
75 | hn = gethostname_malloc(); |
76 | if (!hn) { | |
0192cbdb | 77 | *errnop = ENOMEM; |
e8a7a315 | 78 | *h_errnop = NO_RECOVERY; |
5502f0d9 | 79 | return NSS_STATUS_TRYAGAIN; |
e8a7a315 LP |
80 | } |
81 | ||
61233823 | 82 | /* We respond to our local host name, our hostname suffixed with a single dot. */ |
5502f0d9 | 83 | if (!streq(name, hn) && !streq_ptr(startswith(name, hn), ".")) { |
e8a7a315 LP |
84 | *h_errnop = HOST_NOT_FOUND; |
85 | return NSS_STATUS_NOTFOUND; | |
86 | } | |
87 | ||
1d050e1e | 88 | n_addresses = local_addresses(NULL, 0, AF_UNSPEC, &addresses); |
e80af1bd LP |
89 | if (n_addresses < 0) |
90 | n_addresses = 0; | |
e8a7a315 LP |
91 | |
92 | canonical = hn; | |
93 | local_address_ipv4 = LOCALADDRESS_IPV4; | |
94 | } | |
8041b5ba | 95 | |
e8a7a315 | 96 | l = strlen(canonical); |
5502f0d9 | 97 | ms = ALIGN(l+1) + ALIGN(sizeof(struct gaih_addrtuple)) * (n_addresses > 0 ? n_addresses : 2); |
4e8c8252 | 98 | if (buflen < ms) { |
0192cbdb | 99 | *errnop = ERANGE; |
cda458a5 | 100 | *h_errnop = NETDB_INTERNAL; |
4e8c8252 LP |
101 | return NSS_STATUS_TRYAGAIN; |
102 | } | |
103 | ||
104 | /* First, fill in hostname */ | |
105 | r_name = buffer; | |
e8a7a315 | 106 | memcpy(r_name, canonical, l+1); |
4e8c8252 LP |
107 | idx = ALIGN(l+1); |
108 | ||
68a9c7c4 ZJS |
109 | assert(n_addresses >= 0); |
110 | if (n_addresses == 0) { | |
8041b5ba LP |
111 | /* Second, fill in IPv6 tuple */ |
112 | r_tuple = (struct gaih_addrtuple*) (buffer + idx); | |
113 | r_tuple->next = r_tuple_prev; | |
114 | r_tuple->name = r_name; | |
115 | r_tuple->family = AF_INET6; | |
116 | memcpy(r_tuple->addr, LOCALADDRESS_IPV6, 16); | |
a1077c84 | 117 | r_tuple->scopeid = 0; |
8041b5ba LP |
118 | |
119 | idx += ALIGN(sizeof(struct gaih_addrtuple)); | |
120 | r_tuple_prev = r_tuple; | |
121 | ||
122 | /* Third, fill in IPv4 tuple */ | |
123 | r_tuple = (struct gaih_addrtuple*) (buffer + idx); | |
124 | r_tuple->next = r_tuple_prev; | |
125 | r_tuple->name = r_name; | |
126 | r_tuple->family = AF_INET; | |
e8a7a315 | 127 | *(uint32_t*) r_tuple->addr = local_address_ipv4; |
a1077c84 | 128 | r_tuple->scopeid = 0; |
8041b5ba LP |
129 | |
130 | idx += ALIGN(sizeof(struct gaih_addrtuple)); | |
131 | r_tuple_prev = r_tuple; | |
132 | } | |
133 | ||
134 | /* Fourth, fill actual addresses in, but in backwards order */ | |
e80af1bd | 135 | for (a = addresses + n_addresses - 1, n = 0; (int) n < n_addresses; n++, a--) { |
8041b5ba LP |
136 | r_tuple = (struct gaih_addrtuple*) (buffer + idx); |
137 | r_tuple->next = r_tuple_prev; | |
138 | r_tuple->name = r_name; | |
139 | r_tuple->family = a->family; | |
a1077c84 | 140 | r_tuple->scopeid = a->family == AF_INET6 && IN6_IS_ADDR_LINKLOCAL(&a->address.in6) ? a->ifindex : 0; |
5502f0d9 | 141 | memcpy(r_tuple->addr, &a->address, 16); |
8041b5ba LP |
142 | |
143 | idx += ALIGN(sizeof(struct gaih_addrtuple)); | |
144 | r_tuple_prev = r_tuple; | |
145 | } | |
4e8c8252 LP |
146 | |
147 | /* Verify the size matches */ | |
148 | assert(idx == ms); | |
149 | ||
d2f1f23a ED |
150 | /* Nscd expects us to store the first record in **pat. */ |
151 | if (*pat) | |
152 | **pat = *r_tuple_prev; | |
153 | else | |
154 | *pat = r_tuple_prev; | |
4e8c8252 LP |
155 | |
156 | if (ttlp) | |
157 | *ttlp = 0; | |
158 | ||
06202b9e YW |
159 | /* Explicitly reset both *h_errnop and h_errno to work around |
160 | * https://bugzilla.redhat.com/show_bug.cgi?id=1125975 */ | |
e70df46b LP |
161 | *h_errnop = NETDB_SUCCESS; |
162 | h_errno = 0; | |
163 | ||
4e8c8252 LP |
164 | return NSS_STATUS_SUCCESS; |
165 | } | |
6b21f0cf LP |
166 | |
167 | static enum nss_status fill_in_hostent( | |
e8a7a315 | 168 | const char *canonical, const char *additional, |
4e8c8252 | 169 | int af, |
e80af1bd | 170 | struct local_address *addresses, unsigned n_addresses, |
e8a7a315 | 171 | uint32_t local_address_ipv4, |
4e8c8252 LP |
172 | struct hostent *result, |
173 | char *buffer, size_t buflen, | |
0192cbdb | 174 | int *errnop, int *h_errnop, |
4e8c8252 LP |
175 | int32_t *ttlp, |
176 | char **canonp) { | |
177 | ||
d4c9895d | 178 | size_t l_canonical, l_additional, idx, ms, alen; |
e8a7a315 | 179 | char *r_addr, *r_name, *r_aliases, *r_alias = NULL, *r_addr_list; |
e80af1bd | 180 | struct local_address *a; |
e8a7a315 | 181 | unsigned n, c; |
8041b5ba | 182 | |
5502f0d9 LP |
183 | assert(canonical); |
184 | assert(result); | |
185 | assert(buffer); | |
186 | assert(errnop); | |
187 | assert(h_errnop); | |
188 | ||
9d485985 | 189 | alen = FAMILY_ADDRESS_SIZE(af); |
8041b5ba | 190 | |
8041b5ba LP |
191 | for (a = addresses, n = 0, c = 0; n < n_addresses; a++, n++) |
192 | if (af == a->family) | |
193 | c++; | |
4e8c8252 | 194 | |
e8a7a315 | 195 | l_canonical = strlen(canonical); |
7bf7ce28 | 196 | l_additional = strlen_ptr(additional); |
e8a7a315 LP |
197 | ms = ALIGN(l_canonical+1)+ |
198 | (additional ? ALIGN(l_additional+1) : 0) + | |
5502f0d9 | 199 | sizeof(char*) + |
e8a7a315 | 200 | (additional ? sizeof(char*) : 0) + |
d4c9895d | 201 | (c > 0 ? c : 1) * ALIGN(alen) + |
5502f0d9 | 202 | (c > 0 ? c+1 : 2) * sizeof(char*); |
8041b5ba | 203 | |
4e8c8252 | 204 | if (buflen < ms) { |
0192cbdb | 205 | *errnop = ERANGE; |
cda458a5 | 206 | *h_errnop = NETDB_INTERNAL; |
4e8c8252 LP |
207 | return NSS_STATUS_TRYAGAIN; |
208 | } | |
209 | ||
e8a7a315 | 210 | /* First, fill in hostnames */ |
4e8c8252 | 211 | r_name = buffer; |
e8a7a315 LP |
212 | memcpy(r_name, canonical, l_canonical+1); |
213 | idx = ALIGN(l_canonical+1); | |
4e8c8252 | 214 | |
e8a7a315 LP |
215 | if (additional) { |
216 | r_alias = buffer + idx; | |
217 | memcpy(r_alias, additional, l_additional+1); | |
218 | idx += ALIGN(l_additional+1); | |
219 | } | |
220 | ||
221 | /* Second, create aliases array */ | |
4e8c8252 | 222 | r_aliases = buffer + idx; |
e8a7a315 LP |
223 | if (additional) { |
224 | ((char**) r_aliases)[0] = r_alias; | |
225 | ((char**) r_aliases)[1] = NULL; | |
226 | idx += 2*sizeof(char*); | |
227 | } else { | |
228 | ((char**) r_aliases)[0] = NULL; | |
229 | idx += sizeof(char*); | |
230 | } | |
4e8c8252 | 231 | |
8041b5ba | 232 | /* Third, add addresses */ |
4e8c8252 | 233 | r_addr = buffer + idx; |
8041b5ba LP |
234 | if (c > 0) { |
235 | unsigned i = 0; | |
236 | ||
237 | for (a = addresses, n = 0; n < n_addresses; a++, n++) { | |
238 | if (af != a->family) | |
239 | continue; | |
240 | ||
5502f0d9 | 241 | memcpy(r_addr + i*ALIGN(alen), &a->address, alen); |
8041b5ba LP |
242 | i++; |
243 | } | |
244 | ||
245 | assert(i == c); | |
246 | idx += c*ALIGN(alen); | |
247 | } else { | |
248 | if (af == AF_INET) | |
e8a7a315 | 249 | *(uint32_t*) r_addr = local_address_ipv4; |
8041b5ba LP |
250 | else |
251 | memcpy(r_addr, LOCALADDRESS_IPV6, 16); | |
252 | ||
253 | idx += ALIGN(alen); | |
254 | } | |
4e8c8252 LP |
255 | |
256 | /* Fourth, add address pointer array */ | |
257 | r_addr_list = buffer + idx; | |
8041b5ba | 258 | if (c > 0) { |
d4c9895d | 259 | unsigned i; |
8041b5ba | 260 | |
d4c9895d LP |
261 | for (i = 0; i < c; i++) |
262 | ((char**) r_addr_list)[i] = r_addr + i*ALIGN(alen); | |
8041b5ba | 263 | |
d4c9895d LP |
264 | ((char**) r_addr_list)[i] = NULL; |
265 | idx += (c+1) * sizeof(char*); | |
8041b5ba LP |
266 | |
267 | } else { | |
268 | ((char**) r_addr_list)[0] = r_addr; | |
269 | ((char**) r_addr_list)[1] = NULL; | |
d4c9895d | 270 | idx += 2 * sizeof(char*); |
8041b5ba | 271 | } |
4e8c8252 LP |
272 | |
273 | /* Verify the size matches */ | |
274 | assert(idx == ms); | |
275 | ||
276 | result->h_name = r_name; | |
277 | result->h_aliases = (char**) r_aliases; | |
278 | result->h_addrtype = af; | |
279 | result->h_length = alen; | |
280 | result->h_addr_list = (char**) r_addr_list; | |
281 | ||
282 | if (ttlp) | |
283 | *ttlp = 0; | |
284 | ||
285 | if (canonp) | |
286 | *canonp = r_name; | |
287 | ||
06202b9e YW |
288 | /* Explicitly reset both *h_errnop and h_errno to work around |
289 | * https://bugzilla.redhat.com/show_bug.cgi?id=1125975 */ | |
e70df46b LP |
290 | *h_errnop = NETDB_SUCCESS; |
291 | h_errno = 0; | |
292 | ||
4e8c8252 | 293 | return NSS_STATUS_SUCCESS; |
6b21f0cf LP |
294 | } |
295 | ||
4e8c8252 LP |
296 | enum nss_status _nss_myhostname_gethostbyname3_r( |
297 | const char *name, | |
298 | int af, | |
299 | struct hostent *host, | |
300 | char *buffer, size_t buflen, | |
301 | int *errnop, int *h_errnop, | |
302 | int32_t *ttlp, | |
303 | char **canonp) { | |
6b21f0cf | 304 | |
e80af1bd | 305 | _cleanup_free_ struct local_address *addresses = NULL; |
e8a7a315 | 306 | const char *canonical, *additional = NULL; |
5502f0d9 | 307 | _cleanup_free_ char *hn = NULL; |
e9140aff | 308 | uint32_t local_address_ipv4 = 0; |
e80af1bd | 309 | int n_addresses = 0; |
5502f0d9 | 310 | |
06202b9e | 311 | PROTECT_ERRNO; |
0c5eb056 LP |
312 | BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); |
313 | ||
5502f0d9 LP |
314 | assert(name); |
315 | assert(host); | |
316 | assert(buffer); | |
317 | assert(errnop); | |
318 | assert(h_errnop); | |
6b21f0cf | 319 | |
4e8c8252 LP |
320 | if (af == AF_UNSPEC) |
321 | af = AF_INET; | |
6b21f0cf | 322 | |
ec2ce0c5 | 323 | if (!IN_SET(af, AF_INET, AF_INET6)) { |
0192cbdb | 324 | *errnop = EAFNOSUPPORT; |
4e8c8252 LP |
325 | *h_errnop = NO_DATA; |
326 | return NSS_STATUS_UNAVAIL; | |
327 | } | |
6b21f0cf | 328 | |
5502f0d9 | 329 | if (is_localhost(name)) { |
e8a7a315 | 330 | canonical = "localhost"; |
8e38570e | 331 | local_address_ipv4 = htobe32(INADDR_LOOPBACK); |
e9140aff | 332 | |
46a5e0e7 | 333 | } else if (is_gateway_hostname(name)) { |
e9140aff | 334 | |
1d050e1e | 335 | n_addresses = local_gateways(NULL, 0, af, &addresses); |
e9140aff | 336 | if (n_addresses <= 0) { |
e9140aff LP |
337 | *h_errnop = HOST_NOT_FOUND; |
338 | return NSS_STATUS_NOTFOUND; | |
339 | } | |
340 | ||
5248e7e1 | 341 | canonical = "_gateway"; |
e9140aff | 342 | |
e8a7a315 | 343 | } else { |
5502f0d9 LP |
344 | hn = gethostname_malloc(); |
345 | if (!hn) { | |
0192cbdb | 346 | *errnop = ENOMEM; |
e8a7a315 | 347 | *h_errnop = NO_RECOVERY; |
5502f0d9 | 348 | return NSS_STATUS_TRYAGAIN; |
e8a7a315 | 349 | } |
6b21f0cf | 350 | |
5502f0d9 | 351 | if (!streq(name, hn) && !streq_ptr(startswith(name, hn), ".")) { |
e8a7a315 LP |
352 | *h_errnop = HOST_NOT_FOUND; |
353 | return NSS_STATUS_NOTFOUND; | |
354 | } | |
355 | ||
1d050e1e | 356 | n_addresses = local_addresses(NULL, 0, af, &addresses); |
e80af1bd LP |
357 | if (n_addresses < 0) |
358 | n_addresses = 0; | |
e8a7a315 LP |
359 | |
360 | canonical = hn; | |
361 | additional = n_addresses <= 0 && af == AF_INET6 ? "localhost" : NULL; | |
362 | local_address_ipv4 = LOCALADDRESS_IPV4; | |
4e8c8252 | 363 | } |
6b21f0cf | 364 | |
e8a7a315 LP |
365 | return fill_in_hostent( |
366 | canonical, additional, | |
367 | af, | |
368 | addresses, n_addresses, | |
369 | local_address_ipv4, | |
370 | host, | |
371 | buffer, buflen, | |
0192cbdb | 372 | errnop, h_errnop, |
e8a7a315 LP |
373 | ttlp, |
374 | canonp); | |
4e8c8252 | 375 | } |
6b21f0cf | 376 | |
4e8c8252 LP |
377 | enum nss_status _nss_myhostname_gethostbyaddr2_r( |
378 | const void* addr, socklen_t len, | |
379 | int af, | |
380 | struct hostent *host, | |
381 | char *buffer, size_t buflen, | |
382 | int *errnop, int *h_errnop, | |
383 | int32_t *ttlp) { | |
6b21f0cf | 384 | |
e8a7a315 | 385 | const char *canonical = NULL, *additional = NULL; |
5502f0d9 | 386 | uint32_t local_address_ipv4 = LOCALADDRESS_IPV4; |
e80af1bd | 387 | _cleanup_free_ struct local_address *addresses = NULL; |
5502f0d9 | 388 | _cleanup_free_ char *hn = NULL; |
e80af1bd LP |
389 | int n_addresses = 0; |
390 | struct local_address *a; | |
3fdcecc8 | 391 | bool additional_from_hostname = false; |
e80af1bd | 392 | unsigned n; |
5502f0d9 | 393 | |
06202b9e | 394 | PROTECT_ERRNO; |
0c5eb056 LP |
395 | BLOCK_SIGNALS(NSS_SIGNALS_BLOCK); |
396 | ||
5502f0d9 LP |
397 | assert(addr); |
398 | assert(host); | |
399 | assert(buffer); | |
400 | assert(errnop); | |
401 | assert(h_errnop); | |
8041b5ba | 402 | |
555bd6e9 | 403 | if (!IN_SET(af, AF_INET, AF_INET6)) { |
0192cbdb | 404 | *errnop = EAFNOSUPPORT; |
555bd6e9 LP |
405 | *h_errnop = NO_DATA; |
406 | return NSS_STATUS_UNAVAIL; | |
407 | } | |
408 | ||
9d485985 | 409 | if (len != FAMILY_ADDRESS_SIZE(af)) { |
0192cbdb | 410 | *errnop = EINVAL; |
8041b5ba LP |
411 | *h_errnop = NO_RECOVERY; |
412 | return NSS_STATUS_UNAVAIL; | |
413 | } | |
6b21f0cf | 414 | |
4e8c8252 | 415 | if (af == AF_INET) { |
8041b5ba LP |
416 | if ((*(uint32_t*) addr) == LOCALADDRESS_IPV4) |
417 | goto found; | |
6b21f0cf | 418 | |
8e38570e | 419 | if ((*(uint32_t*) addr) == htobe32(INADDR_LOOPBACK)) { |
e8a7a315 | 420 | canonical = "localhost"; |
8e38570e | 421 | local_address_ipv4 = htobe32(INADDR_LOOPBACK); |
e8a7a315 LP |
422 | goto found; |
423 | } | |
424 | ||
555bd6e9 LP |
425 | } else { |
426 | assert(af == AF_INET6); | |
8041b5ba | 427 | |
e8a7a315 | 428 | if (memcmp(addr, LOCALADDRESS_IPV6, 16) == 0) { |
3fdcecc8 LP |
429 | canonical = "localhost"; |
430 | additional_from_hostname = true; | |
8041b5ba | 431 | goto found; |
e8a7a315 | 432 | } |
4e8c8252 LP |
433 | } |
434 | ||
1d050e1e | 435 | n_addresses = local_addresses(NULL, 0, AF_UNSPEC, &addresses); |
68a9c7c4 ZJS |
436 | for (a = addresses, n = 0; (int) n < n_addresses; n++, a++) { |
437 | if (af != a->family) | |
438 | continue; | |
8041b5ba | 439 | |
68a9c7c4 ZJS |
440 | if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0) |
441 | goto found; | |
e9140aff LP |
442 | } |
443 | ||
97b11eed | 444 | addresses = mfree(addresses); |
e9140aff | 445 | |
1d050e1e | 446 | n_addresses = local_gateways(NULL, 0, AF_UNSPEC, &addresses); |
68a9c7c4 ZJS |
447 | for (a = addresses, n = 0; (int) n < n_addresses; n++, a++) { |
448 | if (af != a->family) | |
449 | continue; | |
e9140aff | 450 | |
68a9c7c4 | 451 | if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0) { |
5248e7e1 | 452 | canonical = "_gateway"; |
68a9c7c4 | 453 | goto found; |
e9140aff | 454 | } |
8041b5ba LP |
455 | } |
456 | ||
8041b5ba | 457 | *h_errnop = HOST_NOT_FOUND; |
8041b5ba LP |
458 | return NSS_STATUS_NOTFOUND; |
459 | ||
460 | found: | |
82e4c2d6 | 461 | if (!canonical || additional_from_hostname) { |
3fdcecc8 LP |
462 | hn = gethostname_malloc(); |
463 | if (!hn) { | |
0192cbdb | 464 | *errnop = ENOMEM; |
3fdcecc8 LP |
465 | *h_errnop = NO_RECOVERY; |
466 | return NSS_STATUS_TRYAGAIN; | |
467 | } | |
468 | ||
469 | if (!canonical) | |
470 | canonical = hn; | |
82e4c2d6 | 471 | else |
3fdcecc8 LP |
472 | additional = hn; |
473 | } | |
4e8c8252 | 474 | |
e8a7a315 LP |
475 | return fill_in_hostent( |
476 | canonical, additional, | |
477 | af, | |
478 | addresses, n_addresses, | |
479 | local_address_ipv4, | |
480 | host, | |
481 | buffer, buflen, | |
0192cbdb | 482 | errnop, h_errnop, |
e8a7a315 LP |
483 | ttlp, |
484 | NULL); | |
4e8c8252 | 485 | } |
6b21f0cf | 486 | |
c9fdc26e LP |
487 | NSS_GETHOSTBYNAME_FALLBACKS(myhostname); |
488 | NSS_GETHOSTBYADDR_FALLBACKS(myhostname); |