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1 | /* Copyright (C) 1997 Free Software Foundation, Inc. |
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 | |
6 | modify it under the terms of the GNU Library General Public License as | |
7 | published by the Free Software Foundation; either version 2 of the | |
8 | License, or (at your option) any later version. | |
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 | |
13 | Library General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Library General Public | |
16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | Boston, MA 02111-1307, USA. */ | |
19 | ||
20 | #include <nss.h> | |
21 | #include <netdb.h> | |
22 | #include <errno.h> | |
23 | #include <ctype.h> | |
24 | #include <string.h> | |
25 | #include <arpa/inet.h> | |
26 | #include <libc-lock.h> | |
27 | #include <rpcsvc/nis.h> | |
28 | #include <rpcsvc/nislib.h> | |
29 | ||
30 | #include "nss-nisplus.h" | |
31 | ||
32 | /* Get the declaration of the parser function. */ | |
33 | #define ENTNAME netent | |
34 | #define DATABASE "networks" | |
35 | #define TRAILING_LIST_MEMBER n_aliases | |
36 | #define TRAILING_LIST_SEPARATOR_P isspace | |
37 | #include "../nss/nss_files/files-parse.c" | |
38 | LINE_PARSER | |
39 | ("#", | |
40 | { | |
41 | char *addr; | |
42 | ||
43 | STRING_FIELD (result->n_name, isspace, 1); | |
44 | ||
45 | STRING_FIELD (addr, isspace, 1); | |
46 | result->n_net = inet_network (addr); | |
47 | ||
48 | }) | |
49 | ||
50 | __libc_lock_define_initialized (static, lock) | |
51 | ||
52 | static nis_result *result = NULL; | |
53 | static nis_name *names = NULL; | |
54 | ||
55 | #define NISENTRYVAL(idx,col,res) \ | |
56 | ((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val) | |
57 | ||
58 | #define NISENTRYLEN(idx,col,res) \ | |
59 | ((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len) | |
60 | ||
61 | ||
62 | static int | |
63 | _nss_nisplus_parse_netent (nis_result *result, struct netent *network, | |
64 | char *buffer, size_t buflen) | |
65 | { | |
66 | char *p = buffer; | |
67 | size_t room_left = buflen; | |
7799b7b3 | 68 | unsigned int i; |
e61abf83 UD |
69 | struct parser_data *data = (void *) buffer; |
70 | ||
71 | if (result == NULL) | |
26dee9c4 | 72 | return 0; |
e61abf83 UD |
73 | |
74 | if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS) || | |
75 | result->objects.objects_val[0].zo_data.zo_type != ENTRY_OBJ || | |
76 | strcmp(result->objects.objects_val[0].zo_data.objdata_u.en_data.en_type, | |
77 | "networks_tbl") != 0 || | |
78 | result->objects.objects_val[0].zo_data.objdata_u.en_data.en_cols.en_cols_len < 3) | |
26dee9c4 | 79 | return 0; |
e61abf83 UD |
80 | |
81 | /* Generate the network entry format and use the normal parser */ | |
82 | if (NISENTRYLEN (0, 0, result) +1 > room_left) | |
83 | { | |
84 | __set_errno (ERANGE); | |
26dee9c4 | 85 | return 0; |
e61abf83 UD |
86 | } |
87 | ||
88 | memset (p, '\0', room_left); | |
89 | ||
90 | strncpy (p, NISENTRYVAL (0, 0, result), NISENTRYLEN (0, 0, result)); | |
91 | room_left -= (NISENTRYLEN (0, 0, result) +1); | |
92 | ||
93 | if (NISENTRYLEN (0, 2, result) +1 > room_left) | |
94 | { | |
95 | __set_errno (ERANGE); | |
26dee9c4 | 96 | return 0; |
e61abf83 UD |
97 | } |
98 | strcat (p, "\t"); | |
99 | strncat (p, NISENTRYVAL (0, 2, result), NISENTRYLEN (0, 2, result)); | |
100 | room_left -= (NISENTRYLEN (0, 2, result) + 1); | |
101 | /* + 1: We overwrite the last \0 */ | |
102 | ||
103 | for (i = 1; i < result->objects.objects_len; i++) | |
e61abf83 UD |
104 | { |
105 | if (NISENTRYLEN (i, 1, result) +1 > room_left) | |
106 | { | |
107 | __set_errno (ERANGE); | |
26dee9c4 | 108 | return 0; |
e61abf83 UD |
109 | } |
110 | strcat (p, " "); | |
111 | strncat (p, NISENTRYVAL (i, 1, result), NISENTRYLEN (i, 1, result)); | |
112 | room_left -= (NISENTRYLEN (i, 1, result) + 1); | |
113 | } | |
114 | ||
115 | return _nss_files_parse_netent (p, network, data, buflen); | |
116 | } | |
117 | ||
118 | enum nss_status | |
119 | _nss_nisplus_setnetent (void) | |
120 | { | |
121 | __libc_lock_lock (lock); | |
122 | ||
123 | if (result) | |
124 | nis_freeresult (result); | |
125 | result = NULL; | |
126 | if (names) | |
127 | { | |
128 | nis_freenames (names); | |
129 | names = NULL; | |
130 | } | |
131 | ||
132 | __libc_lock_unlock (lock); | |
133 | ||
134 | return NSS_STATUS_SUCCESS; | |
135 | } | |
136 | ||
137 | enum nss_status | |
138 | _nss_nisplus_endnetent (void) | |
139 | { | |
140 | __libc_lock_lock (lock); | |
141 | ||
142 | if (result) | |
143 | nis_freeresult (result); | |
144 | result = NULL; | |
145 | if (names) | |
146 | { | |
147 | nis_freenames (names); | |
148 | names = NULL; | |
149 | } | |
150 | ||
151 | __libc_lock_unlock (lock); | |
152 | ||
153 | return NSS_STATUS_SUCCESS; | |
154 | } | |
155 | ||
156 | static enum nss_status | |
157 | internal_nisplus_getnetent_r (struct netent *network, char *buffer, | |
158 | size_t buflen, int *herrnop) | |
159 | { | |
160 | int parse_res; | |
161 | ||
162 | /* Get the next entry until we found a correct one. */ | |
163 | do | |
164 | { | |
165 | if (result == NULL) | |
166 | { | |
167 | names = nis_getnames("networks.org_dir"); | |
168 | if (names == NULL || names[0] == NULL) | |
169 | return NSS_STATUS_UNAVAIL; | |
170 | ||
171 | result = nis_first_entry(names[0]); | |
172 | if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) | |
173 | { | |
174 | int retval; | |
175 | ||
176 | retval = niserr2nss (result->status); | |
177 | if (retval == NSS_STATUS_TRYAGAIN) | |
178 | { | |
179 | *herrnop = NETDB_INTERNAL; | |
180 | __set_errno (EAGAIN); | |
181 | } | |
182 | return retval; | |
183 | } | |
184 | } | |
185 | else | |
186 | { | |
187 | nis_result *res; | |
188 | ||
189 | res = nis_next_entry(names[0], &result->cookie); | |
190 | nis_freeresult (result); | |
191 | result = res; | |
192 | if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) | |
193 | { | |
194 | int retval; | |
195 | ||
196 | retval = niserr2nss (result->status); | |
197 | if (retval == NSS_STATUS_TRYAGAIN) | |
198 | { | |
199 | *herrnop = NETDB_INTERNAL; | |
200 | __set_errno (EAGAIN); | |
201 | } | |
202 | return retval; | |
203 | } | |
204 | } | |
205 | ||
206 | parse_res = _nss_nisplus_parse_netent (result, network, buffer, buflen); | |
207 | if (!parse_res && errno == ERANGE) | |
208 | { | |
209 | *herrnop = NETDB_INTERNAL; | |
210 | return NSS_STATUS_TRYAGAIN; | |
211 | } | |
212 | ||
213 | } while (!parse_res); | |
214 | ||
215 | return NSS_STATUS_SUCCESS; | |
216 | } | |
217 | ||
218 | enum nss_status | |
219 | _nss_nisplus_getnetent_r (struct netent *result, char *buffer, | |
220 | size_t buflen, int *herrnop) | |
221 | { | |
222 | int status; | |
223 | ||
224 | __libc_lock_lock (lock); | |
225 | ||
226 | status = internal_nisplus_getnetent_r (result, buffer, buflen, herrnop); | |
227 | ||
228 | __libc_lock_unlock (lock); | |
229 | ||
230 | return status; | |
231 | } | |
232 | ||
233 | enum nss_status | |
234 | _nss_nisplus_getnetbyname_r (const char *name, struct netent *network, | |
235 | char *buffer, size_t buflen, int *herrnop) | |
236 | { | |
237 | int parse_res, retval; | |
238 | ||
239 | if (name == NULL) | |
240 | { | |
241 | __set_errno (EINVAL); | |
242 | *herrnop = NETDB_INTERNAL; | |
243 | return NSS_STATUS_UNAVAIL; | |
244 | } | |
245 | else | |
246 | { | |
247 | nis_result *result; | |
248 | char buf[strlen (name) + 255]; | |
249 | ||
250 | ||
251 | /* Search at first in the alias list, and use the correct name | |
252 | for the next search */ | |
253 | sprintf(buf, "[name=%s],networks.org_dir", name); | |
254 | result = nis_list(buf, EXPAND_NAME, NULL, NULL); | |
255 | ||
256 | /* If we do not find it, try it as original name. But if the | |
257 | database is correct, we should find it in the first case, too */ | |
258 | if ((result->status != NIS_SUCCESS && | |
259 | result->status != NIS_S_SUCCESS) || | |
260 | result->objects.objects_val[0].zo_data.zo_type != ENTRY_OBJ || | |
261 | strcmp(result->objects.objects_val[0].zo_data.objdata_u.en_data.en_type, | |
262 | "networks_tbl") != 0 || | |
263 | result->objects.objects_val[0].zo_data.objdata_u.en_data.en_cols.en_cols_len < 3) | |
264 | sprintf(buf, "[cname=%s],networks.org_dir", name); | |
265 | else | |
266 | sprintf(buf, "[cname=%s],networks.org_dir", NISENTRYVAL(0, 0, result)); | |
267 | ||
268 | nis_freeresult (result); | |
269 | result = nis_list(buf, EXPAND_NAME, NULL, NULL); | |
270 | ||
271 | retval = niserr2nss (result->status); | |
272 | if (retval != NSS_STATUS_SUCCESS) | |
273 | { | |
274 | if (retval == NSS_STATUS_TRYAGAIN) | |
275 | { | |
276 | __set_errno (EAGAIN); | |
277 | *herrnop = NETDB_INTERNAL; | |
278 | } | |
279 | nis_freeresult (result); | |
280 | return retval; | |
281 | } | |
282 | ||
283 | parse_res = _nss_nisplus_parse_netent (result, network, buffer, buflen); | |
284 | ||
285 | nis_freeresult (result); | |
286 | ||
287 | if (parse_res) | |
288 | return NSS_STATUS_SUCCESS; | |
289 | ||
290 | *herrnop = NETDB_INTERNAL; | |
291 | if (!parse_res && errno == ERANGE) | |
292 | return NSS_STATUS_TRYAGAIN; | |
293 | else | |
294 | return NSS_STATUS_NOTFOUND; | |
295 | } | |
296 | } | |
297 | ||
298 | /* XXX type is ignored, SUN's NIS+ table doesn't support it */ | |
299 | enum nss_status | |
300 | _nss_nisplus_getnetbyaddr_r (const unsigned long addr, const int type, | |
301 | struct netent *network, | |
302 | char *buffer, size_t buflen, int *herrnop) | |
303 | { | |
304 | int parse_res, retval; | |
305 | nis_result *result; | |
306 | char buf[1024]; | |
307 | struct in_addr in; | |
308 | ||
309 | in = inet_makeaddr (addr, 0); | |
310 | snprintf(buf, sizeof (buf) - 1, "[addr=%s],networks.org_dir", | |
311 | inet_ntoa (in)); | |
312 | ||
313 | result = nis_list(buf, EXPAND_NAME, NULL, NULL); | |
314 | ||
315 | retval = niserr2nss (result->status); | |
316 | if (retval != NSS_STATUS_SUCCESS) | |
317 | { | |
318 | if (retval == NSS_STATUS_TRYAGAIN) | |
319 | { | |
320 | __set_errno (EAGAIN); | |
321 | *herrnop = NETDB_INTERNAL; | |
322 | } | |
323 | nis_freeresult (result); | |
324 | return retval; | |
325 | } | |
326 | ||
327 | parse_res = _nss_nisplus_parse_netent (result, network, buffer, buflen); | |
328 | ||
329 | nis_freeresult (result); | |
330 | ||
331 | if (parse_res) | |
332 | return NSS_STATUS_SUCCESS; | |
333 | ||
334 | *herrnop = NETDB_INTERNAL; | |
335 | if (!parse_res && errno == ERANGE) | |
336 | return NSS_STATUS_TRYAGAIN; | |
337 | else | |
338 | return NSS_STATUS_NOTFOUND; | |
339 | } |