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568035b7 | 1 | /* Copyright (C) 1996-2013 Free Software Foundation, Inc. |
6259ec0d | 2 | This file is part of the GNU C Library. |
3b965a7d | 3 | Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996. |
6259ec0d UD |
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. | |
6259ec0d 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. |
6259ec0d | 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/>. */ | |
6259ec0d UD |
18 | |
19 | #include <nss.h> | |
20 | #include <netdb.h> | |
21 | #include <ctype.h> | |
22 | #include <errno.h> | |
23 | #include <string.h> | |
5107cf1d | 24 | #include <bits/libc-lock.h> |
6259ec0d UD |
25 | #include <rpcsvc/yp.h> |
26 | #include <rpcsvc/ypclnt.h> | |
27 | ||
28 | #include "nss-nis.h" | |
29 | ||
7e3be507 UD |
30 | /* Get the declaration of the parser function. */ |
31 | #define ENTNAME rpcent | |
32 | #define EXTERN_PARSER | |
cf29ffbe | 33 | #include <nss/nss_files/files-parse.c> |
7e3be507 | 34 | |
6259ec0d UD |
35 | __libc_lock_define_initialized (static, lock) |
36 | ||
e0d4e91d | 37 | static intern_t intern; |
0ecb606c | 38 | |
a334319f UD |
39 | |
40 | static void | |
41 | internal_nis_endrpcent (intern_t *intern) | |
42 | { | |
e0d4e91d UD |
43 | struct response_t *curr = intern->next; |
44 | ||
45 | while (curr != NULL) | |
a334319f | 46 | { |
e0d4e91d UD |
47 | struct response_t *last = curr; |
48 | curr = curr->next; | |
49 | free (last); | |
a334319f | 50 | } |
e0d4e91d UD |
51 | |
52 | intern->next = intern->start = NULL; | |
b677d674 UD |
53 | } |
54 | ||
6259ec0d | 55 | static enum nss_status |
f166d865 | 56 | internal_nis_setrpcent (intern_t *intern) |
6259ec0d | 57 | { |
f166d865 UD |
58 | char *domainname; |
59 | struct ypall_callback ypcb; | |
0d8733c4 | 60 | enum nss_status status; |
cf29ffbe | 61 | |
f166d865 UD |
62 | if (yp_get_default_domain (&domainname)) |
63 | return NSS_STATUS_UNAVAIL; | |
cf29ffbe | 64 | |
b677d674 | 65 | internal_nis_endrpcent (intern); |
f166d865 | 66 | |
e0d4e91d UD |
67 | ypcb.foreach = _nis_saveit; |
68 | ypcb.data = (char *) intern; | |
69 | status = yperr2nss (yp_all (domainname, "rpc.bynumber", &ypcb)); | |
70 | ||
71 | /* Mark the last buffer as full. */ | |
72 | if (intern->next != NULL) | |
73 | intern->next->size = intern->offset; | |
74 | ||
f166d865 | 75 | intern->next = intern->start; |
e0d4e91d | 76 | intern->offset = 0; |
f166d865 | 77 | |
0d8733c4 | 78 | return status; |
6259ec0d UD |
79 | } |
80 | ||
81 | enum nss_status | |
23bab906 | 82 | _nss_nis_setrpcent (int stayopen) |
6259ec0d UD |
83 | { |
84 | enum nss_status status; | |
85 | ||
86 | __libc_lock_lock (lock); | |
87 | ||
88 | status = internal_nis_setrpcent (&intern); | |
89 | ||
90 | __libc_lock_unlock (lock); | |
91 | ||
92 | return status; | |
93 | } | |
94 | ||
6259ec0d UD |
95 | enum nss_status |
96 | _nss_nis_endrpcent (void) | |
97 | { | |
6259ec0d UD |
98 | __libc_lock_lock (lock); |
99 | ||
b677d674 | 100 | internal_nis_endrpcent (&intern); |
6259ec0d UD |
101 | |
102 | __libc_lock_unlock (lock); | |
103 | ||
b677d674 | 104 | return NSS_STATUS_SUCCESS; |
6259ec0d UD |
105 | } |
106 | ||
107 | static enum nss_status | |
108 | internal_nis_getrpcent_r (struct rpcent *rpc, char *buffer, size_t buflen, | |
e0d4e91d | 109 | int *errnop, intern_t *intern) |
6259ec0d | 110 | { |
7e3be507 | 111 | struct parser_data *pdata = (void *) buffer; |
f166d865 | 112 | int parse_res; |
6259ec0d | 113 | char *p; |
cf29ffbe | 114 | |
e0d4e91d UD |
115 | if (intern->start == NULL) |
116 | internal_nis_setrpcent (intern); | |
cf29ffbe | 117 | |
ed3691ba UD |
118 | if (intern->next == NULL) |
119 | /* Not one entry in the map. */ | |
120 | return NSS_STATUS_NOTFOUND; | |
121 | ||
6259ec0d UD |
122 | /* Get the next entry until we found a correct one. */ |
123 | do | |
124 | { | |
e0d4e91d UD |
125 | struct response_t *bucket = intern->next; |
126 | ||
127 | if (__builtin_expect (intern->offset >= bucket->size, 0)) | |
128 | { | |
129 | if (bucket->next == NULL) | |
130 | return NSS_STATUS_NOTFOUND; | |
131 | ||
132 | /* We look at all the content in the current bucket. Go on | |
133 | to the next. */ | |
134 | bucket = intern->next = bucket->next; | |
135 | intern->offset = 0; | |
136 | } | |
137 | ||
138 | for (p = &bucket->mem[intern->offset]; isspace (*p); ++p) | |
139 | ++intern->offset; | |
0ecb606c | 140 | |
e0d4e91d UD |
141 | size_t len = strlen (p) + 1; |
142 | if (__builtin_expect (len > buflen, 0)) | |
143 | { | |
144 | *errnop = ERANGE; | |
145 | return NSS_STATUS_TRYAGAIN; | |
146 | } | |
147 | ||
148 | /* We unfortunately have to copy the data in the user-provided | |
149 | buffer because that buffer might be around for a very long | |
150 | time and the servent structure must remain valid. If we would | |
151 | rely on the BUCKET memory the next 'setservent' or 'endservent' | |
152 | call would destroy it. | |
153 | ||
154 | The important thing is that it is a single NUL-terminated | |
155 | string. This is what the parsing routine expects. */ | |
156 | p = memcpy (buffer, &bucket->mem[intern->offset], len); | |
cf29ffbe | 157 | |
d71b808a | 158 | parse_res = _nss_files_parse_rpcent (p, rpc, pdata, buflen, errnop); |
ab9a9ff8 | 159 | if (__builtin_expect (parse_res == -1, 0)) |
6259ec0d | 160 | return NSS_STATUS_TRYAGAIN; |
e0d4e91d UD |
161 | |
162 | intern->offset += len; | |
6259ec0d UD |
163 | } |
164 | while (!parse_res); | |
cf29ffbe | 165 | |
6259ec0d UD |
166 | return NSS_STATUS_SUCCESS; |
167 | } | |
168 | ||
169 | enum nss_status | |
d71b808a UD |
170 | _nss_nis_getrpcent_r (struct rpcent *rpc, char *buffer, size_t buflen, |
171 | int *errnop) | |
6259ec0d UD |
172 | { |
173 | enum nss_status status; | |
174 | ||
175 | __libc_lock_lock (lock); | |
176 | ||
d71b808a | 177 | status = internal_nis_getrpcent_r (rpc, buffer, buflen, errnop, &intern); |
6259ec0d UD |
178 | |
179 | __libc_lock_unlock (lock); | |
180 | ||
181 | return status; | |
182 | } | |
183 | ||
184 | enum nss_status | |
185 | _nss_nis_getrpcbyname_r (const char *name, struct rpcent *rpc, | |
d71b808a | 186 | char *buffer, size_t buflen, int *errnop) |
6259ec0d | 187 | { |
6259ec0d UD |
188 | if (name == NULL) |
189 | { | |
ac9f45cf | 190 | *errnop = EINVAL; |
6259ec0d UD |
191 | return NSS_STATUS_UNAVAIL; |
192 | } | |
193 | ||
e0d4e91d | 194 | intern_t data = { NULL, NULL, 0 }; |
ab9a9ff8 UD |
195 | enum nss_status status = internal_nis_setrpcent (&data); |
196 | if (__builtin_expect (status != NSS_STATUS_SUCCESS, 0)) | |
6259ec0d UD |
197 | return status; |
198 | ||
ab9a9ff8 | 199 | int found = 0; |
6259ec0d | 200 | while (!found && |
d71b808a UD |
201 | ((status = internal_nis_getrpcent_r (rpc, buffer, buflen, errnop, |
202 | &data)) == NSS_STATUS_SUCCESS)) | |
6259ec0d UD |
203 | { |
204 | if (strcmp (rpc->r_name, name) == 0) | |
205 | found = 1; | |
206 | else | |
207 | { | |
208 | int i = 0; | |
209 | ||
210 | while (rpc->r_aliases[i] != NULL) | |
211 | { | |
212 | if (strcmp (rpc->r_aliases[i], name) == 0) | |
213 | { | |
214 | found = 1; | |
215 | break; | |
216 | } | |
217 | else | |
218 | ++i; | |
219 | } | |
220 | } | |
221 | } | |
222 | ||
223 | internal_nis_endrpcent (&data); | |
224 | ||
ab9a9ff8 | 225 | if (__builtin_expect (!found && status == NSS_STATUS_SUCCESS, 0)) |
34816665 | 226 | return NSS_STATUS_NOTFOUND; |
ab9a9ff8 UD |
227 | |
228 | return status; | |
6259ec0d UD |
229 | } |
230 | ||
231 | enum nss_status | |
232 | _nss_nis_getrpcbynumber_r (int number, struct rpcent *rpc, | |
d71b808a | 233 | char *buffer, size_t buflen, int *errnop) |
6259ec0d | 234 | { |
ab9a9ff8 UD |
235 | char *domain; |
236 | if (__builtin_expect (yp_get_default_domain (&domain), 0)) | |
6259ec0d UD |
237 | return NSS_STATUS_UNAVAIL; |
238 | ||
ab9a9ff8 UD |
239 | char buf[32]; |
240 | int nlen = snprintf (buf, sizeof (buf), "%d", number); | |
6259ec0d | 241 | |
ab9a9ff8 UD |
242 | char *result; |
243 | int len; | |
244 | int yperr = yp_match (domain, "rpc.bynumber", buf, nlen, &result, &len); | |
6259ec0d | 245 | |
ab9a9ff8 | 246 | if (__builtin_expect (yperr != YPERR_SUCCESS, 0)) |
6259ec0d | 247 | { |
ab9a9ff8 UD |
248 | enum nss_status retval = yperr2nss (yperr); |
249 | ||
34816665 | 250 | if (retval == NSS_STATUS_TRYAGAIN) |
d71b808a | 251 | *errnop = errno; |
6259ec0d UD |
252 | return retval; |
253 | } | |
254 | ||
ab9a9ff8 | 255 | if (__builtin_expect ((size_t) (len + 1) > buflen, 0)) |
6259ec0d UD |
256 | { |
257 | free (result); | |
d71b808a | 258 | *errnop = ERANGE; |
6259ec0d UD |
259 | return NSS_STATUS_TRYAGAIN; |
260 | } | |
261 | ||
ab9a9ff8 | 262 | char *p = strncpy (buffer, result, len); |
6259ec0d UD |
263 | buffer[len] = '\0'; |
264 | while (isspace (*p)) | |
265 | ++p; | |
266 | free (result); | |
267 | ||
ab9a9ff8 UD |
268 | int parse_res = _nss_files_parse_rpcent (p, rpc, (void *) buffer, buflen, |
269 | errnop); | |
270 | if (__builtin_expect (parse_res < 1, 0)) | |
6259ec0d | 271 | { |
60c96635 | 272 | if (parse_res == -1) |
6259ec0d UD |
273 | return NSS_STATUS_TRYAGAIN; |
274 | else | |
34816665 | 275 | return NSS_STATUS_NOTFOUND; |
6259ec0d UD |
276 | } |
277 | else | |
278 | return NSS_STATUS_SUCCESS; | |
279 | } |