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e61abf83 UD |
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 <errno.h> | |
22 | #include <ctype.h> | |
23 | #include <string.h> | |
5107cf1d | 24 | #include <bits/libc-lock.h> |
e61abf83 UD |
25 | #include <netdb.h> |
26 | #include <netinet/ether.h> | |
27 | #include <rpcsvc/nis.h> | |
e61abf83 UD |
28 | #include <netinet/if_ether.h> |
29 | ||
30 | #include "nss-nisplus.h" | |
31 | ||
32 | __libc_lock_define_initialized (static, lock) | |
33 | ||
34 | static nis_result *result = NULL; | |
2d7da676 UD |
35 | static nis_name tablename_val = NULL; |
36 | static u_long tablename_len = 0; | |
e61abf83 UD |
37 | |
38 | /* Because the `ethers' lookup does not fit so well in the scheme so | |
39 | we define a dummy struct here which helps us to use the available | |
40 | functions. */ | |
41 | struct etherent | |
42 | { | |
43 | const char *e_name; | |
44 | struct ether_addr e_addr; | |
45 | }; | |
46 | struct etherent_data {}; | |
47 | ||
e61abf83 UD |
48 | #define NISENTRYVAL(idx,col,res) \ |
49 | ((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val) | |
50 | ||
51 | #define NISENTRYLEN(idx,col,res) \ | |
52 | ((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len) | |
53 | ||
54 | static int | |
55 | _nss_nisplus_parse_etherent (nis_result *result, struct etherent *ether, | |
d71b808a | 56 | char *buffer, size_t buflen, int *errnop) |
e61abf83 UD |
57 | { |
58 | char *p = buffer; | |
59 | size_t room_left = buflen; | |
e61abf83 UD |
60 | |
61 | if (result == NULL) | |
26dee9c4 | 62 | return 0; |
e61abf83 | 63 | |
d71b808a UD |
64 | if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS) |
65 | || result->objects.objects_len != 1 | |
66 | || __type_of (NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ | |
67 | || strcmp (NIS_RES_OBJECT (result)->EN_data.en_type, | |
68 | "ethers_tbl") != 0 | |
69 | || NIS_RES_OBJECT (result)->EN_data.en_cols.en_cols_len < 2) | |
26dee9c4 | 70 | return 0; |
e61abf83 | 71 | |
e61abf83 UD |
72 | /* Generate the ether entry format and use the normal parser */ |
73 | if (NISENTRYLEN (0, 0, result) +1 > room_left) | |
74 | { | |
d71b808a | 75 | *errnop = ERANGE; |
60c96635 | 76 | return -1; |
e61abf83 UD |
77 | } |
78 | strncpy (p, NISENTRYVAL (0, 0, result), NISENTRYLEN (0, 0, result)); | |
79 | room_left -= (NISENTRYLEN (0, 0, result) +1); | |
2d7da676 UD |
80 | ether->e_name = p; |
81 | ||
82 | ether->e_addr = *ether_aton (NISENTRYVAL (0, 1, result)); | |
83 | ||
84 | return 1; | |
85 | } | |
e61abf83 | 86 | |
2d7da676 | 87 | static enum nss_status |
d71b808a | 88 | _nss_create_tablename (int *errnop) |
2d7da676 UD |
89 | { |
90 | if (tablename_val == NULL) | |
e61abf83 | 91 | { |
2d7da676 UD |
92 | char buf [40 + strlen (nis_local_directory ())]; |
93 | char *p; | |
e61abf83 | 94 | |
9a0a462c UD |
95 | p = __stpcpy (buf, "ethers.org_dir."); |
96 | p = __stpcpy (p, nis_local_directory ()); | |
97 | tablename_val = __strdup (buf); | |
2d7da676 | 98 | if (tablename_val == NULL) |
d71b808a UD |
99 | { |
100 | *errnop = errno; | |
101 | return NSS_STATUS_TRYAGAIN; | |
102 | } | |
2d7da676 UD |
103 | tablename_len = strlen (tablename_val); |
104 | } | |
105 | return NSS_STATUS_SUCCESS; | |
e61abf83 UD |
106 | } |
107 | ||
2d7da676 | 108 | |
e61abf83 UD |
109 | enum nss_status |
110 | _nss_nisplus_setetherent (void) | |
111 | { | |
2d7da676 | 112 | enum nss_status status; |
d71b808a | 113 | int err; |
2d7da676 UD |
114 | |
115 | status = NSS_STATUS_SUCCESS; | |
116 | ||
e61abf83 UD |
117 | __libc_lock_lock (lock); |
118 | ||
119 | if (result) | |
120 | nis_freeresult (result); | |
121 | result = NULL; | |
2d7da676 | 122 | |
d71b808a | 123 | if (_nss_create_tablename (&err) != NSS_STATUS_SUCCESS) |
2d7da676 | 124 | status = NSS_STATUS_UNAVAIL; |
e61abf83 UD |
125 | |
126 | __libc_lock_unlock (lock); | |
127 | ||
128 | return NSS_STATUS_SUCCESS; | |
129 | } | |
130 | ||
131 | enum nss_status | |
132 | _nss_nisplus_endetherent (void) | |
133 | { | |
134 | __libc_lock_lock (lock); | |
135 | ||
136 | if (result) | |
137 | nis_freeresult (result); | |
138 | result = NULL; | |
e61abf83 UD |
139 | |
140 | __libc_lock_unlock (lock); | |
141 | ||
142 | return NSS_STATUS_SUCCESS; | |
143 | } | |
144 | ||
145 | static enum nss_status | |
146 | internal_nisplus_getetherent_r (struct etherent *ether, char *buffer, | |
d71b808a | 147 | size_t buflen, int *errnop) |
e61abf83 UD |
148 | { |
149 | int parse_res; | |
150 | ||
2d7da676 | 151 | if (tablename_val == NULL) |
d71b808a UD |
152 | { |
153 | enum nss_status status = _nss_create_tablename (errnop); | |
154 | ||
155 | if (status != NSS_STATUS_SUCCESS) | |
156 | return status; | |
157 | } | |
2d7da676 | 158 | |
e61abf83 UD |
159 | /* Get the next entry until we found a correct one. */ |
160 | do | |
161 | { | |
60c96635 | 162 | nis_result *saved_result; |
8f2ece69 | 163 | |
e61abf83 UD |
164 | if (result == NULL) |
165 | { | |
60c96635 | 166 | saved_result = NULL; |
d71b808a | 167 | result = nis_first_entry (tablename_val); |
e61abf83 UD |
168 | if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) |
169 | return niserr2nss (result->status); | |
170 | } | |
171 | else | |
172 | { | |
173 | nis_result *res2; | |
174 | ||
2d7da676 | 175 | res2 = nis_next_entry(tablename_val, &result->cookie); |
60c96635 | 176 | saved_result = result; |
e61abf83 UD |
177 | result = res2; |
178 | if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) | |
60c96635 UD |
179 | { |
180 | nis_freeresult (saved_result); | |
181 | return niserr2nss (result->status); | |
182 | } | |
e61abf83 UD |
183 | } |
184 | ||
d71b808a UD |
185 | parse_res = _nss_nisplus_parse_etherent (result, ether, buffer, |
186 | buflen, errnop); | |
187 | if (parse_res == -1) | |
60c96635 UD |
188 | { |
189 | nis_freeresult (result); | |
d71b808a | 190 | *errnop = ERANGE; |
60c96635 UD |
191 | result = saved_result; |
192 | return NSS_STATUS_TRYAGAIN; | |
193 | } | |
194 | else | |
195 | { | |
196 | if (saved_result != NULL) | |
197 | nis_freeresult (saved_result); | |
198 | } | |
8f2ece69 | 199 | |
e61abf83 UD |
200 | } while (!parse_res); |
201 | ||
202 | return NSS_STATUS_SUCCESS; | |
203 | } | |
204 | ||
205 | enum nss_status | |
206 | _nss_nisplus_getetherent_r (struct etherent *result, char *buffer, | |
d71b808a | 207 | size_t buflen, int *errnop) |
e61abf83 UD |
208 | { |
209 | int status; | |
210 | ||
211 | __libc_lock_lock (lock); | |
212 | ||
d71b808a | 213 | status = internal_nisplus_getetherent_r (result, buffer, buflen, errnop); |
e61abf83 UD |
214 | |
215 | __libc_lock_unlock (lock); | |
216 | ||
217 | return status; | |
218 | } | |
219 | ||
220 | enum nss_status | |
221 | _nss_nisplus_gethostton_r (const char *name, struct etherent *eth, | |
d71b808a | 222 | char *buffer, size_t buflen, int *errnop) |
e61abf83 UD |
223 | { |
224 | int parse_res; | |
225 | ||
2d7da676 | 226 | if (tablename_val == NULL) |
d71b808a UD |
227 | { |
228 | enum nss_status status = _nss_create_tablename (errnop); | |
229 | ||
230 | if (status != NSS_STATUS_SUCCESS) | |
231 | return status; | |
232 | } | |
2d7da676 | 233 | |
60c96635 | 234 | if (name != NULL) |
e61abf83 UD |
235 | { |
236 | nis_result *result; | |
2d7da676 | 237 | char buf[strlen (name) + 40 + tablename_len]; |
e61abf83 | 238 | |
d71b808a | 239 | sprintf (buf, "[name=%s],%s", name, tablename_val); |
e61abf83 | 240 | |
d71b808a | 241 | result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL); |
e61abf83 UD |
242 | |
243 | if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) | |
60c96635 UD |
244 | { |
245 | enum nss_status status = niserr2nss (result->status); | |
246 | nis_freeresult (result); | |
247 | return status; | |
248 | } | |
8f2ece69 | 249 | |
d71b808a UD |
250 | parse_res = _nss_nisplus_parse_etherent (result, eth, buffer, |
251 | buflen, errnop); | |
252 | if (parse_res == -1) | |
60c96635 UD |
253 | { |
254 | nis_freeresult (result); | |
d71b808a | 255 | *errnop = ERANGE; |
60c96635 UD |
256 | return NSS_STATUS_TRYAGAIN; |
257 | } | |
8f2ece69 | 258 | |
e61abf83 UD |
259 | if (parse_res) |
260 | return NSS_STATUS_SUCCESS; | |
e61abf83 | 261 | } |
60c96635 | 262 | return NSS_STATUS_NOTFOUND; |
e61abf83 UD |
263 | } |
264 | ||
265 | enum nss_status | |
266 | _nss_nisplus_getntohost_r (const struct ether_addr *addr, | |
267 | struct etherent *eth, | |
d71b808a | 268 | char *buffer, size_t buflen, int *errnop) |
e61abf83 | 269 | { |
2d7da676 | 270 | if (tablename_val == NULL) |
d71b808a UD |
271 | { |
272 | enum nss_status status = _nss_create_tablename (errnop); | |
273 | ||
274 | if (status != NSS_STATUS_SUCCESS) | |
275 | return status; | |
276 | } | |
e61abf83 UD |
277 | |
278 | if (addr == NULL) | |
279 | { | |
d71b808a | 280 | *errnop = EINVAL; |
e61abf83 UD |
281 | return NSS_STATUS_UNAVAIL; |
282 | } | |
2d7da676 UD |
283 | else |
284 | { | |
285 | int parse_res; | |
286 | nis_result *result; | |
287 | char buf[255 + tablename_len]; | |
e61abf83 | 288 | |
2d7da676 | 289 | memset (&buf, '\0', sizeof (buf)); |
d71b808a UD |
290 | sprintf (buf, "[addr=%x:%x:%x:%x:%x:%x],ethers.org_dir", |
291 | addr->ether_addr_octet[0], addr->ether_addr_octet[1], | |
292 | addr->ether_addr_octet[2], addr->ether_addr_octet[3], | |
293 | addr->ether_addr_octet[4], addr->ether_addr_octet[5]); | |
e61abf83 | 294 | |
d71b808a | 295 | result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL); |
e61abf83 | 296 | |
2d7da676 | 297 | if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) |
60c96635 UD |
298 | { |
299 | enum nss_status status = niserr2nss (result->status); | |
300 | nis_freeresult (result); | |
301 | return status; | |
302 | } | |
e61abf83 | 303 | |
d71b808a UD |
304 | parse_res = _nss_nisplus_parse_etherent (result, eth, buffer, |
305 | buflen, errnop); | |
306 | if (parse_res == -1) | |
60c96635 UD |
307 | { |
308 | nis_freeresult (result); | |
d71b808a | 309 | *errnop = ERANGE; |
60c96635 UD |
310 | return NSS_STATUS_TRYAGAIN; |
311 | } | |
8f2ece69 | 312 | |
2d7da676 UD |
313 | if (parse_res) |
314 | return NSS_STATUS_SUCCESS; | |
2d7da676 | 315 | } |
60c96635 | 316 | return NSS_STATUS_NOTFOUND; |
e61abf83 | 317 | } |