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688903eb | 1 | /* Copyright (C) 1997-2018 Free Software Foundation, Inc. |
e61abf83 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
e61abf83 UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
e61abf83 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
e61abf83 | 18 | |
36a8586d | 19 | #include <errno.h> |
2d7da676 | 20 | #include <fcntl.h> |
e61abf83 | 21 | #include <string.h> |
4360eafd | 22 | #include <libintl.h> |
e61abf83 UD |
23 | #include <rpc/rpc.h> |
24 | #include <rpc/auth.h> | |
25 | #include <rpcsvc/nis.h> | |
26 | #include <sys/socket.h> | |
697d37b1 JJ |
27 | #include <sys/stat.h> |
28 | #include <unistd.h> | |
e61abf83 UD |
29 | #include <netinet/in.h> |
30 | #include <arpa/inet.h> | |
ec999b8e | 31 | #include <libc-lock.h> |
91eee4dd UD |
32 | |
33 | #include "nis_xdr.h" | |
e61abf83 | 34 | #include "nis_intern.h" |
2d571cd1 | 35 | #include <libnsl.h> |
82f43dd2 | 36 | #include <shlib-compat.h> |
e61abf83 | 37 | |
cd40e3a7 UD |
38 | static const struct timeval RPCTIMEOUT = {10, 0}; |
39 | static const struct timeval UDPTIMEOUT = {5, 0}; | |
2d7da676 | 40 | |
26a60f90 UD |
41 | extern u_short __pmap_getnisport (struct sockaddr_in *address, u_long program, |
42 | u_long version, u_int protocol); | |
43 | ||
bd1ebae0 | 44 | unsigned long int |
e61abf83 UD |
45 | inetstr2int (const char *str) |
46 | { | |
929b1c07 UD |
47 | size_t j = 0; |
48 | for (size_t i = 0; str[i] != '\0'; ++i) | |
bd1ebae0 | 49 | if (str[i] == '.' && __builtin_expect (++j == 4, 0)) |
e61abf83 | 50 | { |
929b1c07 UD |
51 | char buffer[i + 1]; |
52 | buffer[i] = '\0'; | |
53 | return inet_addr (memcpy (buffer, str, i)); | |
e61abf83 UD |
54 | } |
55 | ||
929b1c07 | 56 | return inet_addr (str); |
e61abf83 UD |
57 | } |
58 | ||
e852e889 UD |
59 | void |
60 | __nisbind_destroy (dir_binding *bind) | |
e61abf83 | 61 | { |
2d7da676 | 62 | if (bind->clnt != NULL) |
e61abf83 | 63 | { |
2d7da676 UD |
64 | if (bind->use_auth) |
65 | auth_destroy (bind->clnt->cl_auth); | |
66 | clnt_destroy (bind->clnt); | |
67 | } | |
2d7da676 | 68 | } |
1e4d83f6 | 69 | libnsl_hidden_nolink_def (__nisbind_destroy, GLIBC_2_1) |
2d7da676 | 70 | |
e852e889 UD |
71 | nis_error |
72 | __nisbind_next (dir_binding *bind) | |
2d7da676 | 73 | { |
2d7da676 UD |
74 | if (bind->clnt != NULL) |
75 | { | |
76 | if (bind->use_auth) | |
77 | auth_destroy (bind->clnt->cl_auth); | |
78 | clnt_destroy (bind->clnt); | |
79 | bind->clnt = NULL; | |
80 | } | |
3996f34b UD |
81 | |
82 | if (bind->trys >= bind->server_len) | |
83 | return NIS_FAIL; | |
84 | ||
bd1ebae0 | 85 | for (u_int j = bind->current_ep + 1; |
3996f34b UD |
86 | j < bind->server_val[bind->server_used].ep.ep_len; ++j) |
87 | if (strcmp (bind->server_val[bind->server_used].ep.ep_val[j].family, | |
88 | "inet") == 0) | |
e852e889 | 89 | if (bind->server_val[bind->server_used].ep.ep_val[j].proto[0] == '-') |
3996f34b UD |
90 | { |
91 | bind->current_ep = j; | |
92 | return NIS_SUCCESS; | |
93 | } | |
94 | ||
95 | ++bind->trys; | |
96 | ++bind->server_used; | |
97 | if (bind->server_used >= bind->server_len) | |
98 | bind->server_used = 0; | |
99 | ||
bd1ebae0 | 100 | for (u_int j = 0; j < bind->server_val[bind->server_used].ep.ep_len; ++j) |
3996f34b UD |
101 | if (strcmp (bind->server_val[bind->server_used].ep.ep_val[j].family, |
102 | "inet") == 0) | |
d6db1d53 | 103 | if (bind->server_val[bind->server_used].ep.ep_val[j].proto[0] == '-') |
3996f34b UD |
104 | { |
105 | bind->current_ep = j; | |
106 | return NIS_SUCCESS; | |
107 | } | |
108 | ||
109 | return NIS_FAIL; | |
2d7da676 | 110 | } |
1e4d83f6 | 111 | libnsl_hidden_nolink_def (__nisbind_next, GLIBC_2_1) |
2d7da676 | 112 | |
697d37b1 JJ |
113 | static struct ckey_cache_entry |
114 | { | |
115 | struct in_addr inaddr; | |
116 | in_port_t port; | |
117 | unsigned int protocol; | |
118 | des_block ckey; | |
119 | } *ckey_cache; | |
120 | static size_t ckey_cache_size; | |
121 | static size_t ckey_cache_allocated; | |
122 | static pid_t ckey_cache_pid; | |
123 | static uid_t ckey_cache_euid; | |
124 | __libc_lock_define_initialized (static, ckey_cache_lock) | |
125 | ||
126 | static bool_t | |
127 | get_ckey (des_block *ckey, struct sockaddr_in *addr, unsigned int protocol) | |
128 | { | |
129 | size_t i; | |
130 | pid_t pid = getpid (); | |
131 | uid_t euid = geteuid (); | |
132 | bool_t ret = FALSE; | |
133 | ||
134 | __libc_lock_lock (ckey_cache_lock); | |
135 | ||
136 | if (ckey_cache_pid != pid || ckey_cache_euid != euid) | |
137 | { | |
138 | ckey_cache_size = 0; | |
139 | ckey_cache_pid = pid; | |
140 | ckey_cache_euid = euid; | |
141 | } | |
142 | ||
143 | for (i = 0; i < ckey_cache_size; ++i) | |
144 | if (ckey_cache[i].port == addr->sin_port | |
145 | && ckey_cache[i].protocol == protocol | |
146 | && memcmp (&ckey_cache[i].inaddr, &addr->sin_addr, | |
147 | sizeof (addr->sin_addr)) == 0) | |
148 | { | |
149 | *ckey = ckey_cache[i].ckey; | |
150 | ret = TRUE; | |
151 | break; | |
152 | } | |
153 | ||
154 | if (!ret && key_gendes (ckey) >= 0) | |
155 | { | |
156 | ret = TRUE; | |
157 | /* Don't grow the cache indefinitely. */ | |
158 | if (ckey_cache_size == 256) | |
159 | ckey_cache_size = 0; | |
160 | if (ckey_cache_size == ckey_cache_allocated) | |
161 | { | |
162 | size_t size = ckey_cache_allocated ? ckey_cache_allocated * 2 : 16; | |
163 | struct ckey_cache_entry *new_cache | |
164 | = realloc (ckey_cache, size * sizeof (*ckey_cache)); | |
165 | if (new_cache != NULL) | |
166 | { | |
167 | ckey_cache = new_cache; | |
168 | ckey_cache_allocated = size; | |
169 | } | |
170 | } | |
171 | ckey_cache[ckey_cache_size].inaddr = addr->sin_addr; | |
172 | ckey_cache[ckey_cache_size].port = addr->sin_port; | |
173 | ckey_cache[ckey_cache_size].protocol = protocol; | |
174 | ckey_cache[ckey_cache_size++].ckey = *ckey; | |
175 | } | |
176 | ||
177 | __libc_lock_unlock (ckey_cache_lock); | |
178 | return ret; | |
179 | } | |
180 | ||
e852e889 UD |
181 | nis_error |
182 | __nisbind_connect (dir_binding *dbp) | |
2d7da676 | 183 | { |
2d7da676 | 184 | nis_server *serv; |
697d37b1 | 185 | u_short port; |
2d7da676 UD |
186 | |
187 | if (dbp == NULL) | |
188 | return NIS_FAIL; | |
189 | ||
190 | serv = &dbp->server_val[dbp->server_used]; | |
191 | ||
192 | memset (&dbp->addr, '\0', sizeof (dbp->addr)); | |
193 | dbp->addr.sin_family = AF_INET; | |
3996f34b UD |
194 | |
195 | dbp->addr.sin_addr.s_addr = | |
196 | inetstr2int (serv->ep.ep_val[dbp->current_ep].uaddr); | |
197 | ||
bd1ebae0 | 198 | if (dbp->addr.sin_addr.s_addr == INADDR_NONE) |
2d7da676 UD |
199 | return NIS_FAIL; |
200 | ||
26a60f90 UD |
201 | /* Check, if the host is online and rpc.nisd is running. Much faster |
202 | then the clnt*_create functions: */ | |
697d37b1 JJ |
203 | port = __pmap_getnisport (&dbp->addr, NIS_PROG, NIS_VERSION, |
204 | dbp->use_udp ? IPPROTO_UDP : IPPROTO_TCP); | |
205 | if (port == 0) | |
26a60f90 UD |
206 | return NIS_RPCERROR; |
207 | ||
697d37b1 | 208 | dbp->addr.sin_port = htons (port); |
2d7da676 UD |
209 | dbp->socket = RPC_ANYSOCK; |
210 | if (dbp->use_udp) | |
211 | dbp->clnt = clntudp_create (&dbp->addr, NIS_PROG, NIS_VERSION, | |
cc3fa755 | 212 | UDPTIMEOUT, &dbp->socket); |
2d7da676 UD |
213 | else |
214 | dbp->clnt = clnttcp_create (&dbp->addr, NIS_PROG, NIS_VERSION, | |
215 | &dbp->socket, 0, 0); | |
3996f34b | 216 | |
2d7da676 UD |
217 | if (dbp->clnt == NULL) |
218 | return NIS_RPCERROR; | |
3996f34b | 219 | |
cd40e3a7 | 220 | clnt_control (dbp->clnt, CLSET_TIMEOUT, (caddr_t) &RPCTIMEOUT); |
2d7da676 UD |
221 | /* If the program exists, close the socket */ |
222 | if (fcntl (dbp->socket, F_SETFD, 1) == -1) | |
a18f73be | 223 | perror ("fcntl: F_SETFD"); |
3996f34b | 224 | |
2d7da676 UD |
225 | if (dbp->use_auth) |
226 | { | |
e852e889 | 227 | if (serv->key_type == NIS_PK_DH) |
e61abf83 | 228 | { |
cd40e3a7 | 229 | char netname[MAXNETNAMELEN + 1]; |
2d7da676 | 230 | char *p; |
697d37b1 | 231 | des_block ckey; |
3996f34b | 232 | |
697d37b1 | 233 | p = stpcpy (netname, "unix@"); |
cd40e3a7 | 234 | strncpy (p, serv->name, MAXNETNAMELEN - 5); |
2d7da676 | 235 | netname[MAXNETNAMELEN] = '\0'; |
697d37b1 JJ |
236 | dbp->clnt->cl_auth = NULL; |
237 | if (get_ckey (&ckey, &dbp->addr, | |
238 | dbp->use_udp ? IPPROTO_UDP : IPPROTO_TCP)) | |
239 | dbp->clnt->cl_auth = | |
240 | authdes_pk_create (netname, &serv->pkey, 300, NULL, &ckey); | |
2d7da676 UD |
241 | if (!dbp->clnt->cl_auth) |
242 | dbp->clnt->cl_auth = authunix_create_default (); | |
e61abf83 | 243 | } |
2d7da676 | 244 | else |
2d7da676 | 245 | dbp->clnt->cl_auth = authunix_create_default (); |
2d7da676 | 246 | } |
3996f34b | 247 | |
2d7da676 UD |
248 | return NIS_SUCCESS; |
249 | } | |
1e4d83f6 | 250 | libnsl_hidden_nolink_def (__nisbind_connect, GLIBC_2_1) |
26dee9c4 | 251 | |
e852e889 | 252 | nis_error |
a1129917 | 253 | __nisbind_create (dir_binding *dbp, const nis_server *serv_val, |
697d37b1 JJ |
254 | unsigned int serv_len, unsigned int server_used, |
255 | unsigned int current_ep, unsigned int flags) | |
2d7da676 | 256 | { |
d6db1d53 | 257 | dbp->clnt = NULL; |
3996f34b | 258 | |
2d7da676 | 259 | dbp->server_len = serv_len; |
d6db1d53 | 260 | dbp->server_val = (nis_server *)serv_val; |
3996f34b UD |
261 | |
262 | if (flags & USE_DGRAM) | |
263 | dbp->use_udp = TRUE; | |
264 | else | |
265 | dbp->use_udp = FALSE; | |
266 | ||
267 | if (flags & NO_AUTHINFO) | |
268 | dbp->use_auth = FALSE; | |
269 | else | |
270 | dbp->use_auth = TRUE; | |
271 | ||
272 | if (flags & MASTER_ONLY) | |
273 | dbp->master_only = TRUE; | |
274 | else | |
275 | dbp->master_only = FALSE; | |
276 | ||
26a60f90 | 277 | /* We try the first server */ |
3996f34b UD |
278 | dbp->trys = 1; |
279 | ||
ac9f45cf | 280 | dbp->class = -1; |
697d37b1 JJ |
281 | if (server_used == ~0) |
282 | { | |
283 | if (__nis_findfastest (dbp) < 1) | |
284 | return NIS_NAMEUNREACHABLE; | |
285 | } | |
286 | else | |
287 | { | |
288 | dbp->server_used = server_used; | |
289 | dbp->current_ep = current_ep; | |
290 | } | |
2d7da676 | 291 | |
d6db1d53 | 292 | return NIS_SUCCESS; |
e61abf83 | 293 | } |
1e4d83f6 | 294 | libnsl_hidden_nolink_def (__nisbind_create, GLIBC_2_1) |
e61abf83 | 295 | |
e852e889 UD |
296 | /* __nisbind_connect (dbp) must be run before calling this function ! |
297 | So we could use the same binding twice */ | |
e61abf83 | 298 | nis_error |
e852e889 | 299 | __do_niscall3 (dir_binding *dbp, u_long prog, xdrproc_t xargs, caddr_t req, |
a1129917 | 300 | xdrproc_t xres, caddr_t resp, unsigned int flags, nis_cb *cb) |
e61abf83 | 301 | { |
2d7da676 UD |
302 | enum clnt_stat result; |
303 | nis_error retcode; | |
2d7da676 | 304 | |
e852e889 | 305 | if (dbp == NULL) |
a5a0310d | 306 | return NIS_NAMEUNREACHABLE; |
e61abf83 | 307 | |
2d7da676 | 308 | do |
43b0e40f | 309 | { |
2d7da676 | 310 | again: |
e852e889 | 311 | result = clnt_call (dbp->clnt, prog, xargs, req, xres, resp, RPCTIMEOUT); |
3996f34b | 312 | |
43b0e40f | 313 | if (result != RPC_SUCCESS) |
e852e889 | 314 | retcode = NIS_RPCERROR; |
43b0e40f | 315 | else |
2d7da676 UD |
316 | { |
317 | switch (prog) | |
318 | { | |
650425ce UD |
319 | case NIS_IBLIST: |
320 | if ((((nis_result *)resp)->status == NIS_CBRESULTS) && | |
321 | (cb != NULL)) | |
322 | { | |
cd40e3a7 | 323 | __nis_do_callback (dbp, &((nis_result *) resp)->cookie, cb); |
650425ce UD |
324 | break; |
325 | } | |
e852e889 UD |
326 | /* Yes, the missing break is correct. If we doesn't have to |
327 | start a callback, look if we have to search another server */ | |
2d7da676 UD |
328 | case NIS_LOOKUP: |
329 | case NIS_ADD: | |
330 | case NIS_MODIFY: | |
331 | case NIS_REMOVE: | |
2d7da676 UD |
332 | case NIS_IBADD: |
333 | case NIS_IBMODIFY: | |
334 | case NIS_IBREMOVE: | |
335 | case NIS_IBFIRST: | |
336 | case NIS_IBNEXT: | |
cd40e3a7 UD |
337 | if (((nis_result *)resp)->status == NIS_SYSTEMERROR |
338 | || ((nis_result *)resp)->status == NIS_NOSUCHNAME | |
339 | || ((nis_result *)resp)->status == NIS_NOT_ME) | |
3996f34b | 340 | { |
1d4f062a | 341 | next_server: |
e852e889 | 342 | if (__nisbind_next (dbp) == NIS_SUCCESS) |
650425ce | 343 | { |
e852e889 | 344 | while (__nisbind_connect (dbp) != NIS_SUCCESS) |
650425ce | 345 | { |
e852e889 | 346 | if (__nisbind_next (dbp) != NIS_SUCCESS) |
650425ce | 347 | return NIS_SUCCESS; |
650425ce UD |
348 | } |
349 | } | |
350 | else | |
351 | break; /* No more servers to search in */ | |
2d7da676 | 352 | goto again; |
3996f34b | 353 | } |
a5a0310d | 354 | break; |
2d7da676 | 355 | case NIS_FINDDIRECTORY: |
cd40e3a7 UD |
356 | if (((fd_result *)resp)->status == NIS_SYSTEMERROR |
357 | || ((fd_result *)resp)->status == NIS_NOSUCHNAME | |
358 | || ((fd_result *)resp)->status == NIS_NOT_ME) | |
1d4f062a | 359 | goto next_server; |
2d7da676 UD |
360 | break; |
361 | case NIS_DUMPLOG: /* log_result */ | |
362 | case NIS_DUMP: | |
cd40e3a7 UD |
363 | if (((log_result *)resp)->lr_status == NIS_SYSTEMERROR |
364 | || ((log_result *)resp)->lr_status == NIS_NOSUCHNAME | |
365 | || ((log_result *)resp)->lr_status == NIS_NOT_ME) | |
1d4f062a | 366 | goto next_server; |
2d7da676 | 367 | break; |
2d7da676 UD |
368 | default: |
369 | break; | |
370 | } | |
2d7da676 UD |
371 | retcode = NIS_SUCCESS; |
372 | } | |
43b0e40f | 373 | } |
2d7da676 | 374 | while ((flags & HARD_LOOKUP) && retcode == NIS_RPCERROR); |
3996f34b UD |
375 | |
376 | return retcode; | |
43b0e40f | 377 | } |
1e4d83f6 | 378 | libnsl_hidden_nolink_def (__do_niscall3, GLIBC_PRIVATE) |
2d571cd1 | 379 | |
43b0e40f | 380 | |
e852e889 UD |
381 | nis_error |
382 | __do_niscall2 (const nis_server *server, u_int server_len, u_long prog, | |
383 | xdrproc_t xargs, caddr_t req, xdrproc_t xres, caddr_t resp, | |
a1129917 | 384 | unsigned int flags, nis_cb *cb) |
e852e889 UD |
385 | { |
386 | dir_binding dbp; | |
387 | nis_error status; | |
388 | ||
389 | if (flags & MASTER_ONLY) | |
390 | server_len = 1; | |
391 | ||
697d37b1 | 392 | status = __nisbind_create (&dbp, server, server_len, ~0, ~0, flags); |
e852e889 UD |
393 | if (status != NIS_SUCCESS) |
394 | return status; | |
395 | ||
396 | while (__nisbind_connect (&dbp) != NIS_SUCCESS) | |
cd40e3a7 UD |
397 | if (__nisbind_next (&dbp) != NIS_SUCCESS) |
398 | return NIS_NAMEUNREACHABLE; | |
e852e889 UD |
399 | |
400 | status = __do_niscall3 (&dbp, prog, xargs, req, xres, resp, flags, cb); | |
401 | ||
402 | __nisbind_destroy (&dbp); | |
403 | ||
404 | return status; | |
405 | ||
406 | } | |
407 | ||
43b0e40f | 408 | static directory_obj * |
e852e889 | 409 | rec_dirsearch (const_nis_name name, directory_obj *dir, nis_error *status) |
43b0e40f | 410 | { |
2d7da676 UD |
411 | fd_result *fd_res; |
412 | XDR xdrs; | |
43b0e40f | 413 | |
26a60f90 | 414 | switch (nis_dir_cmp (name, dir->do_name)) |
43b0e40f UD |
415 | { |
416 | case SAME_NAME: | |
3996f34b | 417 | *status = NIS_SUCCESS; |
43b0e40f UD |
418 | return dir; |
419 | case NOT_SEQUENTIAL: | |
420 | /* NOT_SEQUENTIAL means, go one up and try it there ! */ | |
421 | case HIGHER_NAME: | |
422 | { /* We need data from a parent domain */ | |
423 | directory_obj *obj; | |
7ab174ed | 424 | const char *ndomain = __nis_domain_of (dir->do_name); |
43b0e40f UD |
425 | |
426 | /* The root server of our domain is a replica of the parent | |
427 | domain ! (Now I understand why a root server must be a | |
428 | replica of the parent domain) */ | |
2d7da676 | 429 | fd_res = __nis_finddirectory (dir, ndomain); |
5f1724bf UD |
430 | if (fd_res == NULL) |
431 | { | |
758b9d7e | 432 | nis_free_directory (dir); |
5f1724bf UD |
433 | *status = NIS_NOMEMORY; |
434 | return NULL; | |
435 | } | |
3996f34b | 436 | *status = fd_res->status; |
2d7da676 UD |
437 | if (fd_res->status != NIS_SUCCESS) |
438 | { | |
26a60f90 | 439 | /* Try the current directory obj, maybe it works */ |
af6f3906 | 440 | __free_fdresult (fd_res); |
26a60f90 | 441 | return dir; |
2d7da676 | 442 | } |
758b9d7e | 443 | nis_free_directory (dir); |
cd40e3a7 | 444 | obj = calloc (1, sizeof (directory_obj)); |
758b9d7e UD |
445 | if (obj == NULL) |
446 | { | |
447 | __free_fdresult (fd_res); | |
448 | *status = NIS_NOMEMORY; | |
449 | return NULL; | |
450 | } | |
cd40e3a7 UD |
451 | xdrmem_create (&xdrs, fd_res->dir_data.dir_data_val, |
452 | fd_res->dir_data.dir_data_len, XDR_DECODE); | |
453 | _xdr_directory_obj (&xdrs, obj); | |
454 | xdr_destroy (&xdrs); | |
dfd2257a | 455 | __free_fdresult (fd_res); |
758b9d7e UD |
456 | |
457 | /* We have found a NIS+ server serving ndomain, now | |
458 | let us search for "name" */ | |
459 | return rec_dirsearch (name, obj, status); | |
43b0e40f | 460 | } |
758b9d7e | 461 | break; |
43b0e40f UD |
462 | case LOWER_NAME: |
463 | { | |
464 | directory_obj *obj; | |
a53bad16 | 465 | size_t namelen = strlen (name); |
cd40e3a7 UD |
466 | char leaf[namelen + 3]; |
467 | char domain[namelen + 3]; | |
7ab174ed | 468 | const char *ndomain; |
714a562f | 469 | char *cp; |
26a60f90 UD |
470 | |
471 | strcpy (domain, name); | |
3996f34b | 472 | |
43b0e40f UD |
473 | do |
474 | { | |
a53bad16 | 475 | if (domain[0] == '\0') |
43b0e40f UD |
476 | { |
477 | nis_free_directory (dir); | |
478 | return NULL; | |
479 | } | |
480 | nis_leaf_of_r (domain, leaf, sizeof (leaf)); | |
7ab174ed UD |
481 | ndomain = __nis_domain_of (domain); |
482 | memmove (domain, ndomain, strlen (ndomain) + 1); | |
43b0e40f UD |
483 | } |
484 | while (nis_dir_cmp (domain, dir->do_name) != SAME_NAME); | |
062e719b | 485 | |
616d9133 | 486 | cp = rawmemchr (leaf, '\0'); |
714a562f UD |
487 | *cp++ = '.'; |
488 | strcpy (cp, domain); | |
3996f34b | 489 | |
2d7da676 | 490 | fd_res = __nis_finddirectory (dir, leaf); |
5f1724bf UD |
491 | if (fd_res == NULL) |
492 | { | |
758b9d7e | 493 | nis_free_directory (dir); |
5f1724bf UD |
494 | *status = NIS_NOMEMORY; |
495 | return NULL; | |
496 | } | |
3996f34b | 497 | *status = fd_res->status; |
2d7da676 | 498 | if (fd_res->status != NIS_SUCCESS) |
43b0e40f | 499 | { |
26a60f90 | 500 | /* Try the current directory object, maybe it works */ |
af6f3906 | 501 | __free_fdresult (fd_res); |
26a60f90 | 502 | return dir; |
2d7da676 | 503 | } |
758b9d7e UD |
504 | nis_free_directory (dir); |
505 | obj = calloc (1, sizeof(directory_obj)); | |
506 | if (obj == NULL) | |
2d7da676 | 507 | { |
758b9d7e UD |
508 | __free_fdresult (fd_res); |
509 | *status = NIS_NOMEMORY; | |
510 | return NULL; | |
43b0e40f | 511 | } |
758b9d7e UD |
512 | xdrmem_create (&xdrs, fd_res->dir_data.dir_data_val, |
513 | fd_res->dir_data.dir_data_len, XDR_DECODE); | |
514 | _xdr_directory_obj (&xdrs, obj); | |
515 | xdr_destroy (&xdrs); | |
516 | __free_fdresult (fd_res); | |
517 | /* We have found a NIS+ server serving ndomain, now | |
518 | let us search for "name" */ | |
519 | return rec_dirsearch (name, obj, status); | |
43b0e40f | 520 | } |
758b9d7e | 521 | break; |
43b0e40f UD |
522 | case BAD_NAME: |
523 | nis_free_directory (dir); | |
3996f34b | 524 | *status = NIS_BADNAME; |
43b0e40f UD |
525 | return NULL; |
526 | } | |
527 | nis_free_directory (dir); | |
3996f34b | 528 | *status = NIS_FAIL; |
43b0e40f UD |
529 | return NULL; |
530 | } | |
531 | ||
26a60f90 UD |
532 | /* We try to query the current server for the searched object, |
533 | maybe he know about it ? */ | |
534 | static directory_obj * | |
7ab174ed | 535 | first_shoot (const_nis_name name, directory_obj *dir) |
26a60f90 | 536 | { |
7b53e1fb | 537 | directory_obj *obj = NULL; |
26a60f90 UD |
538 | fd_result *fd_res; |
539 | XDR xdrs; | |
26a60f90 UD |
540 | |
541 | if (nis_dir_cmp (name, dir->do_name) == SAME_NAME) | |
542 | return dir; | |
11bf311e | 543 | |
7ab174ed | 544 | fd_res = __nis_finddirectory (dir, name); |
5f1724bf UD |
545 | if (fd_res == NULL) |
546 | return NULL; | |
cd40e3a7 UD |
547 | if (fd_res->status == NIS_SUCCESS |
548 | && (obj = calloc (1, sizeof (directory_obj))) != NULL) | |
26a60f90 | 549 | { |
bd1ebae0 UD |
550 | xdrmem_create (&xdrs, fd_res->dir_data.dir_data_val, |
551 | fd_res->dir_data.dir_data_len, XDR_DECODE); | |
cd40e3a7 UD |
552 | _xdr_directory_obj (&xdrs, obj); |
553 | xdr_destroy (&xdrs); | |
bd1ebae0 UD |
554 | |
555 | if (strcmp (dir->do_name, obj->do_name) != 0) | |
556 | { | |
557 | nis_free_directory (obj); | |
558 | obj = NULL; | |
559 | } | |
26a60f90 | 560 | } |
cd40e3a7 | 561 | |
26a60f90 | 562 | __free_fdresult (fd_res); |
cd40e3a7 | 563 | |
26a60f90 | 564 | if (obj != NULL) |
cd40e3a7 UD |
565 | nis_free_directory (dir); |
566 | ||
567 | return obj; | |
26a60f90 UD |
568 | } |
569 | ||
697d37b1 JJ |
570 | static struct nis_server_cache |
571 | { | |
7ab174ed | 572 | int search_parent; |
697d37b1 JJ |
573 | int uses; |
574 | unsigned int size; | |
575 | unsigned int server_used; | |
576 | unsigned int current_ep; | |
577 | time_t expires; | |
578 | char name[]; | |
579 | } *nis_server_cache[16]; | |
580 | static time_t nis_cold_start_mtime; | |
581 | __libc_lock_define_initialized (static, nis_server_cache_lock) | |
582 | ||
583 | static directory_obj * | |
7ab174ed | 584 | nis_server_cache_search (const_nis_name name, int search_parent, |
697d37b1 JJ |
585 | unsigned int *server_used, unsigned int *current_ep, |
586 | struct timeval *now) | |
587 | { | |
588 | directory_obj *ret = NULL; | |
589 | int i; | |
590 | char *addr; | |
591 | XDR xdrs; | |
592 | struct stat64 st; | |
593 | ||
0facd3df | 594 | int saved_errno = errno; |
697d37b1 JJ |
595 | if (stat64 ("/var/nis/NIS_COLD_START", &st) < 0) |
596 | st.st_mtime = nis_cold_start_mtime + 1; | |
0facd3df | 597 | __set_errno (saved_errno); |
697d37b1 JJ |
598 | |
599 | __libc_lock_lock (nis_server_cache_lock); | |
600 | ||
601 | for (i = 0; i < 16; ++i) | |
602 | if (nis_server_cache[i] == NULL) | |
603 | continue; | |
604 | else if (st.st_mtime != nis_cold_start_mtime | |
605 | || now->tv_sec > nis_server_cache[i]->expires) | |
606 | { | |
607 | free (nis_server_cache[i]); | |
608 | nis_server_cache[i] = NULL; | |
609 | } | |
7ab174ed | 610 | else if (nis_server_cache[i]->search_parent == search_parent |
697d37b1 JJ |
611 | && strcmp (nis_server_cache[i]->name, name) == 0) |
612 | { | |
613 | ret = calloc (1, sizeof (directory_obj)); | |
614 | if (ret == NULL) | |
615 | break; | |
616 | ||
617 | addr = rawmemchr (nis_server_cache[i]->name, '\0') + 8; | |
618 | addr = (char *) ((uintptr_t) addr & ~(uintptr_t) 7); | |
619 | xdrmem_create (&xdrs, addr, nis_server_cache[i]->size, XDR_DECODE); | |
620 | if (!_xdr_directory_obj (&xdrs, ret)) | |
621 | { | |
622 | xdr_destroy (&xdrs); | |
623 | free (ret); | |
624 | ret = NULL; | |
625 | free (nis_server_cache[i]); | |
626 | nis_server_cache[i] = NULL; | |
627 | break; | |
628 | } | |
629 | xdr_destroy (&xdrs); | |
630 | *server_used = nis_server_cache[i]->server_used; | |
631 | *current_ep = nis_server_cache[i]->current_ep; | |
632 | break; | |
633 | } | |
634 | ||
635 | nis_cold_start_mtime = st.st_mtime; | |
636 | ||
637 | __libc_lock_unlock (nis_server_cache_lock); | |
638 | return ret; | |
639 | } | |
640 | ||
641 | static void | |
7ab174ed | 642 | nis_server_cache_add (const_nis_name name, int search_parent, |
697d37b1 JJ |
643 | directory_obj *dir, unsigned int server_used, |
644 | unsigned int current_ep, struct timeval *now) | |
645 | { | |
646 | struct nis_server_cache **loc; | |
647 | struct nis_server_cache *new; | |
648 | struct nis_server_cache *old; | |
649 | int i; | |
650 | char *addr; | |
651 | unsigned int size; | |
652 | XDR xdrs; | |
653 | ||
654 | if (dir == NULL) | |
655 | return; | |
656 | ||
657 | size = xdr_sizeof ((xdrproc_t) _xdr_directory_obj, (char *) dir); | |
658 | new = calloc (1, sizeof (*new) + strlen (name) + 8 + size); | |
659 | if (new == NULL) | |
660 | return; | |
7ab174ed | 661 | new->search_parent = search_parent; |
697d37b1 JJ |
662 | new->uses = 1; |
663 | new->expires = now->tv_sec + dir->do_ttl; | |
664 | new->size = size; | |
665 | new->server_used = server_used; | |
666 | new->current_ep = current_ep; | |
667 | addr = stpcpy (new->name, name) + 8; | |
668 | addr = (char *) ((uintptr_t) addr & ~(uintptr_t) 7); | |
669 | ||
670 | xdrmem_create(&xdrs, addr, size, XDR_ENCODE); | |
671 | if (!_xdr_directory_obj (&xdrs, dir)) | |
672 | { | |
673 | xdr_destroy (&xdrs); | |
674 | free (new); | |
675 | return; | |
676 | } | |
677 | xdr_destroy (&xdrs); | |
678 | ||
679 | __libc_lock_lock (nis_server_cache_lock); | |
680 | ||
681 | /* Choose which entry should be evicted from the cache. */ | |
682 | loc = &nis_server_cache[0]; | |
683 | if (*loc != NULL) | |
df1cf487 YR |
684 | { |
685 | for (i = 1; i < 16; ++i) | |
686 | if (nis_server_cache[i] == NULL) | |
687 | { | |
688 | loc = &nis_server_cache[i]; | |
689 | break; | |
690 | } | |
691 | else if ((*loc)->uses > nis_server_cache[i]->uses | |
692 | || ((*loc)->uses == nis_server_cache[i]->uses | |
693 | && (*loc)->expires > nis_server_cache[i]->expires)) | |
697d37b1 | 694 | loc = &nis_server_cache[i]; |
df1cf487 | 695 | } |
697d37b1 JJ |
696 | old = *loc; |
697 | *loc = new; | |
698 | ||
699 | __libc_lock_unlock (nis_server_cache_lock); | |
700 | free (old); | |
701 | } | |
702 | ||
43b0e40f | 703 | nis_error |
7ab174ed | 704 | __nisfind_server (const_nis_name name, int search_parent, |
697d37b1 | 705 | directory_obj **dir, dir_binding *dbp, unsigned int flags) |
43b0e40f | 706 | { |
697d37b1 JJ |
707 | nis_error result = NIS_SUCCESS; |
708 | nis_error status; | |
709 | directory_obj *obj; | |
710 | struct timeval now; | |
711 | unsigned int server_used = ~0; | |
712 | unsigned int current_ep = ~0; | |
713 | ||
2d7da676 UD |
714 | if (name == NULL) |
715 | return NIS_BADNAME; | |
43b0e40f | 716 | |
697d37b1 JJ |
717 | if (*dir != NULL) |
718 | return NIS_SUCCESS; | |
3996f34b | 719 | |
697d37b1 JJ |
720 | (void) gettimeofday (&now, NULL); |
721 | ||
722 | if ((flags & NO_CACHE) == 0) | |
7ab174ed | 723 | *dir = nis_server_cache_search (name, search_parent, &server_used, |
697d37b1 JJ |
724 | ¤t_ep, &now); |
725 | if (*dir != NULL) | |
0ecb606c | 726 | { |
697d37b1 JJ |
727 | unsigned int server_len = (*dir)->do_servers.do_servers_len; |
728 | if (flags & MASTER_ONLY) | |
729 | { | |
730 | server_len = 1; | |
731 | if (server_used != 0) | |
732 | { | |
733 | server_used = ~0; | |
734 | current_ep = ~0; | |
735 | } | |
736 | } | |
737 | result = __nisbind_create (dbp, (*dir)->do_servers.do_servers_val, | |
738 | server_len, server_used, current_ep, flags); | |
739 | if (result != NIS_SUCCESS) | |
740 | { | |
741 | nis_free_directory (*dir); | |
742 | *dir = NULL; | |
743 | } | |
744 | return result; | |
745 | } | |
0ecb606c | 746 | |
0facd3df | 747 | int saved_errno = errno; |
697d37b1 | 748 | *dir = readColdStartFile (); |
0facd3df | 749 | __set_errno (saved_errno); |
697d37b1 JJ |
750 | if (*dir == NULL) |
751 | /* No /var/nis/NIS_COLD_START->no NIS+ installed. */ | |
752 | return NIS_UNAVAIL; | |
a334319f | 753 | |
697d37b1 | 754 | /* Try at first, if servers in "dir" know our object */ |
7ab174ed UD |
755 | const char *search_name = name; |
756 | if (search_parent) | |
757 | search_name = __nis_domain_of (name); | |
758 | obj = first_shoot (search_name, *dir); | |
697d37b1 JJ |
759 | if (obj == NULL) |
760 | { | |
7ab174ed | 761 | obj = rec_dirsearch (search_name, *dir, &status); |
a334319f | 762 | if (obj == NULL) |
697d37b1 JJ |
763 | result = status; |
764 | } | |
765 | ||
766 | if (result == NIS_SUCCESS) | |
767 | { | |
88fa1769 | 768 | unsigned int server_len = obj->do_servers.do_servers_len; |
697d37b1 JJ |
769 | if (flags & MASTER_ONLY) |
770 | server_len = 1; | |
88fa1769 | 771 | result = __nisbind_create (dbp, obj->do_servers.do_servers_val, |
697d37b1 JJ |
772 | server_len, ~0, ~0, flags); |
773 | if (result == NIS_SUCCESS) | |
a788b6c2 | 774 | { |
697d37b1 | 775 | if ((flags & MASTER_ONLY) == 0 |
88fa1769 | 776 | || obj->do_servers.do_servers_len == 1) |
697d37b1 JJ |
777 | { |
778 | server_used = dbp->server_used; | |
779 | current_ep = dbp->current_ep; | |
780 | } | |
781 | if ((flags & NO_CACHE) == 0) | |
7ab174ed | 782 | nis_server_cache_add (name, search_parent, obj, |
697d37b1 JJ |
783 | server_used, current_ep, &now); |
784 | } | |
785 | else | |
786 | { | |
787 | nis_free_directory (obj); | |
788 | obj = NULL; | |
32c075e1 | 789 | } |
11bf311e | 790 | } |
32c075e1 | 791 | |
697d37b1 JJ |
792 | *dir = obj; |
793 | ||
5f1724bf | 794 | return result; |
0ecb606c | 795 | } |
0ecb606c | 796 | |
a17fa610 | 797 | |
e852e889 | 798 | nis_error |
a17fa610 UD |
799 | __prepare_niscall (const_nis_name name, directory_obj **dirp, |
800 | dir_binding *bptrp, unsigned int flags) | |
e852e889 | 801 | { |
697d37b1 | 802 | nis_error retcode = __nisfind_server (name, 1, dirp, bptrp, flags); |
a1ffb40e | 803 | if (__glibc_unlikely (retcode != NIS_SUCCESS)) |
a17fa610 UD |
804 | return retcode; |
805 | ||
697d37b1 JJ |
806 | do |
807 | if (__nisbind_connect (bptrp) == NIS_SUCCESS) | |
808 | return NIS_SUCCESS; | |
809 | while (__nisbind_next (bptrp) == NIS_SUCCESS); | |
11bf311e | 810 | |
697d37b1 JJ |
811 | __nisbind_destroy (bptrp); |
812 | memset (bptrp, '\0', sizeof (*bptrp)); | |
a17fa610 | 813 | |
697d37b1 | 814 | retcode = NIS_NAMEUNREACHABLE; |
a17fa610 UD |
815 | nis_free_directory (*dirp); |
816 | *dirp = NULL; | |
817 | ||
818 | return retcode; | |
819 | } | |
1e4d83f6 | 820 | libnsl_hidden_nolink_def (__prepare_niscall, GLIBC_PRIVATE) |
a17fa610 UD |
821 | |
822 | ||
823 | nis_error | |
824 | __do_niscall (const_nis_name name, u_long prog, xdrproc_t xargs, | |
825 | caddr_t req, xdrproc_t xres, caddr_t resp, unsigned int flags, | |
826 | nis_cb *cb) | |
827 | { | |
828 | dir_binding bptr; | |
829 | directory_obj *dir = NULL; | |
830 | int saved_errno = errno; | |
831 | ||
832 | nis_error retcode = __prepare_niscall (name, &dir, &bptr, flags); | |
e852e889 UD |
833 | if (retcode == NIS_SUCCESS) |
834 | { | |
e852e889 | 835 | retcode = __do_niscall3 (&bptr, prog, xargs, req, xres, resp, flags, cb); |
3996f34b | 836 | |
e852e889 | 837 | __nisbind_destroy (&bptr); |
43b0e40f | 838 | |
a17fa610 UD |
839 | nis_free_directory (dir); |
840 | } | |
a334319f | 841 | |
a788b6c2 UD |
842 | __set_errno (saved_errno); |
843 | ||
2d7da676 | 844 | return retcode; |
e61abf83 | 845 | } |