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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 <errno.h> | |
22 | #include <ctype.h> | |
23 | #include <string.h> | |
24 | #include <libc-lock.h> | |
25 | #include <netdb.h> | |
26 | #include <netinet/ether.h> | |
27 | #include <rpcsvc/nis.h> | |
28 | #include <rpcsvc/nislib.h> | |
29 | #include <netinet/if_ether.h> | |
30 | ||
31 | #include "nss-nisplus.h" | |
32 | ||
33 | __libc_lock_define_initialized (static, lock) | |
34 | ||
35 | static nis_result *result = NULL; | |
36 | static nis_name *names = NULL; | |
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 | ||
48 | #define ENTNAME etherent | |
49 | #define DATABASE "ethers" | |
50 | #include "../../nss/nss_files/files-parse.c" | |
51 | LINE_PARSER | |
52 | ("#", | |
53 | /* Read the ethernet address: 6 x 8bit hexadecimal number. */ | |
54 | { | |
55 | size_t cnt; | |
56 | ||
57 | for (cnt = 0; cnt < 6; ++cnt) | |
58 | { | |
59 | unsigned int number; | |
60 | ||
61 | if (cnt < 5) | |
62 | INT_FIELD (number, ISCOLON , 0, 16, (unsigned int)) | |
63 | else | |
64 | INT_FIELD (number, isspace, 0, 16, (unsigned int)) | |
65 | ||
66 | if (number > 0xff) | |
67 | return 0; | |
68 | result->e_addr.ether_addr_octet[cnt] = number; | |
69 | } | |
70 | }; | |
71 | STRING_FIELD (result->e_name, isspace, 1); | |
72 | ) | |
73 | ||
74 | #define NISENTRYVAL(idx,col,res) \ | |
75 | ((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val) | |
76 | ||
77 | #define NISENTRYLEN(idx,col,res) \ | |
78 | ((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len) | |
79 | ||
80 | static int | |
81 | _nss_nisplus_parse_etherent (nis_result *result, struct etherent *ether, | |
82 | char *buffer, size_t buflen) | |
83 | { | |
84 | char *p = buffer; | |
85 | size_t room_left = buflen; | |
86 | struct parser_data *data = (void *) buffer; | |
87 | ||
88 | if (result == NULL) | |
89 | return -1; | |
90 | ||
91 | if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS) || | |
92 | result->objects.objects_len != 1 || | |
93 | result->objects.objects_val[0].zo_data.zo_type != ENTRY_OBJ || | |
94 | strcmp(result->objects.objects_val[0].zo_data.objdata_u.en_data.en_type, | |
95 | "ethers_tbl") != 0 || | |
96 | result->objects.objects_val[0].zo_data.objdata_u.en_data.en_cols.en_cols_len < 2) | |
97 | return -1; | |
98 | ||
99 | memset (p, '\0', room_left); | |
100 | ||
101 | /* Generate the ether entry format and use the normal parser */ | |
102 | if (NISENTRYLEN (0, 0, result) +1 > room_left) | |
103 | { | |
104 | __set_errno (ERANGE); | |
105 | return -1; | |
106 | } | |
107 | strncpy (p, NISENTRYVAL (0, 0, result), NISENTRYLEN (0, 0, result)); | |
108 | room_left -= (NISENTRYLEN (0, 0, result) +1); | |
109 | ||
110 | if (NISENTRYLEN (0, 1, result) +1 > room_left) | |
111 | { | |
112 | __set_errno (ERANGE); | |
113 | return -1; | |
114 | } | |
115 | strcat (p, "\t"); | |
116 | strncat (p, NISENTRYVAL (0, 1, result), NISENTRYLEN (0, 1, result)); | |
117 | room_left -= (NISENTRYLEN (0, 1, result) + 1); | |
118 | ||
119 | return _nss_files_parse_etherent (p,ether, data, buflen); | |
120 | } | |
121 | ||
122 | enum nss_status | |
123 | _nss_nisplus_setetherent (void) | |
124 | { | |
125 | __libc_lock_lock (lock); | |
126 | ||
127 | if (result) | |
128 | nis_freeresult (result); | |
129 | result = NULL; | |
130 | if (names) | |
131 | { | |
132 | nis_freenames (names); | |
133 | names = NULL; | |
134 | } | |
135 | ||
136 | __libc_lock_unlock (lock); | |
137 | ||
138 | return NSS_STATUS_SUCCESS; | |
139 | } | |
140 | ||
141 | enum nss_status | |
142 | _nss_nisplus_endetherent (void) | |
143 | { | |
144 | __libc_lock_lock (lock); | |
145 | ||
146 | if (result) | |
147 | nis_freeresult (result); | |
148 | result = NULL; | |
149 | if (names) | |
150 | { | |
151 | nis_freenames (names); | |
152 | names = NULL; | |
153 | } | |
154 | ||
155 | __libc_lock_unlock (lock); | |
156 | ||
157 | return NSS_STATUS_SUCCESS; | |
158 | } | |
159 | ||
160 | static enum nss_status | |
161 | internal_nisplus_getetherent_r (struct etherent *ether, char *buffer, | |
162 | size_t buflen) | |
163 | { | |
164 | int parse_res; | |
165 | ||
166 | /* Get the next entry until we found a correct one. */ | |
167 | do | |
168 | { | |
169 | if (result == NULL) | |
170 | { | |
171 | names = nis_getnames("ethers.org_dir"); | |
172 | if (names == NULL || names[0] == NULL) | |
173 | return NSS_STATUS_UNAVAIL; | |
174 | ||
175 | result = nis_first_entry(names[0]); | |
176 | if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) | |
177 | return niserr2nss (result->status); | |
178 | } | |
179 | else | |
180 | { | |
181 | nis_result *res2; | |
182 | ||
183 | res2 = nis_next_entry(names[0], &result->cookie); | |
184 | nis_freeresult (result); | |
185 | result = res2; | |
186 | if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) | |
187 | return niserr2nss (result->status); | |
188 | } | |
189 | ||
190 | parse_res = _nss_nisplus_parse_etherent (result, ether, buffer, buflen); | |
191 | } while (!parse_res); | |
192 | ||
193 | return NSS_STATUS_SUCCESS; | |
194 | } | |
195 | ||
196 | enum nss_status | |
197 | _nss_nisplus_getetherent_r (struct etherent *result, char *buffer, | |
198 | size_t buflen) | |
199 | { | |
200 | int status; | |
201 | ||
202 | __libc_lock_lock (lock); | |
203 | ||
204 | status = internal_nisplus_getetherent_r (result, buffer, buflen); | |
205 | ||
206 | __libc_lock_unlock (lock); | |
207 | ||
208 | return status; | |
209 | } | |
210 | ||
211 | enum nss_status | |
212 | _nss_nisplus_gethostton_r (const char *name, struct etherent *eth, | |
213 | char *buffer, size_t buflen) | |
214 | { | |
215 | int parse_res; | |
216 | ||
217 | if (name == NULL) | |
218 | return NSS_STATUS_NOTFOUND; | |
219 | else | |
220 | { | |
221 | nis_result *result; | |
222 | char buf[strlen (name) + 255]; | |
223 | ||
224 | sprintf(buf, "[name=%s],ethers.org_dir", name); | |
225 | ||
226 | result = nis_list(buf, EXPAND_NAME, NULL, NULL); | |
227 | ||
228 | if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) | |
229 | return niserr2nss (result->status); | |
230 | ||
231 | parse_res = _nss_nisplus_parse_etherent (result, eth, buffer, buflen); | |
232 | ||
233 | if (parse_res) | |
234 | return NSS_STATUS_SUCCESS; | |
235 | ||
236 | if (!parse_res && errno == ERANGE) | |
237 | return NSS_STATUS_TRYAGAIN; | |
238 | else | |
239 | return NSS_STATUS_NOTFOUND; | |
240 | } | |
241 | } | |
242 | ||
243 | enum nss_status | |
244 | _nss_nisplus_getntohost_r (const struct ether_addr *addr, | |
245 | struct etherent *eth, | |
246 | char *buffer, size_t buflen) | |
247 | { | |
248 | int parse_res; | |
249 | nis_result *result; | |
250 | char buf[255]; | |
251 | ||
252 | if (addr == NULL) | |
253 | { | |
254 | __set_errno (EINVAL); | |
255 | return NSS_STATUS_UNAVAIL; | |
256 | } | |
257 | ||
258 | memset (&buf, '\0', sizeof (buf)); | |
259 | snprintf(buf, sizeof (buf), "[addr=%x:%x:%x:%x:%x:%x],ethers.org_dir", | |
260 | addr->ether_addr_octet[0], addr->ether_addr_octet[1], | |
261 | addr->ether_addr_octet[2], addr->ether_addr_octet[3], | |
262 | addr->ether_addr_octet[4], addr->ether_addr_octet[5]); | |
263 | ||
264 | result = nis_list(buf, EXPAND_NAME, NULL, NULL); | |
265 | ||
266 | if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) | |
267 | return niserr2nss (result->status); | |
268 | ||
269 | parse_res = _nss_nisplus_parse_etherent (result, eth, buffer, buflen); | |
270 | ||
271 | if (parse_res) | |
272 | return NSS_STATUS_SUCCESS; | |
273 | ||
274 | if (!parse_res && errno == ERANGE) | |
275 | return NSS_STATUS_TRYAGAIN; | |
276 | else | |
277 | return NSS_STATUS_NOTFOUND; | |
278 | } |