]> CyberLeo.Net >> Repos - FreeBSD/releng/10.0.git/blob - usr.sbin/nscd/agents/services.c
- Copy stable/10 (r259064) to releng/10.0 as part of the
[FreeBSD/releng/10.0.git] / usr.sbin / nscd / agents / services.c
1 /*-
2  * Copyright (c) 2005 Michael Bushkov <bushman@rsu.ru>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <sys/param.h>
32
33 #include <assert.h>
34 #include <netdb.h>
35 #include <nsswitch.h>
36 #include <stdlib.h>
37 #include <string.h>
38
39 #include "../debug.h"
40 #include "services.h"
41
42 static int services_marshal_func(struct servent *, char *, size_t *);
43 static int services_lookup_func(const char *, size_t, char **, size_t *);
44 static void *services_mp_init_func(void);
45 static int services_mp_lookup_func(char **, size_t *, void *);
46 static void services_mp_destroy_func(void *);
47
48 static int
49 services_marshal_func(struct servent *serv, char *buffer, size_t *buffer_size)
50 {
51         struct servent  new_serv;
52         size_t  desired_size;
53         char    **alias;
54         char    *p;
55         size_t  size;
56         size_t  aliases_size;
57
58         TRACE_IN(services_marshal_func);
59         desired_size = ALIGNBYTES + sizeof(struct servent) + sizeof(char *);
60         if (serv->s_name != NULL)
61                 desired_size += strlen(serv->s_name) + 1;
62         if (serv->s_proto != NULL)
63                 desired_size += strlen(serv->s_proto) + 1;
64
65         aliases_size = 0;
66         if (serv->s_aliases != NULL) {
67                 for (alias = serv->s_aliases; *alias; ++alias) {
68                         desired_size += strlen(*alias) + 1;
69                         ++aliases_size;
70                 }
71
72                 desired_size += ALIGNBYTES + sizeof(char *) *
73                     (aliases_size + 1);
74         }
75
76         if ((*buffer_size < desired_size) || (buffer == NULL)) {
77                 *buffer_size = desired_size;
78                 TRACE_OUT(services_marshal_func);
79                 return (NS_RETURN);
80         }
81
82         memcpy(&new_serv, serv, sizeof(struct servent));
83         memset(buffer, 0, desired_size);
84
85         *buffer_size = desired_size;
86         p = buffer + sizeof(struct servent) + sizeof(char *);
87         memcpy(buffer + sizeof(struct servent), &p, sizeof(char *));
88         p = (char *)ALIGN(p);
89
90         if (new_serv.s_name != NULL) {
91                 size = strlen(new_serv.s_name);
92                 memcpy(p, new_serv.s_name, size);
93                 new_serv.s_name = p;
94                 p += size + 1;
95         }
96
97         if (new_serv.s_proto != NULL) {
98                 size = strlen(new_serv.s_proto);
99                 memcpy(p, new_serv.s_proto, size);
100                 new_serv.s_proto = p;
101                 p += size + 1;
102         }
103
104         if (new_serv.s_aliases != NULL) {
105                 p = (char *)ALIGN(p);
106                 memcpy(p, new_serv.s_aliases, sizeof(char *) * aliases_size);
107                 new_serv.s_aliases = (char **)p;
108                 p += sizeof(char *) * (aliases_size + 1);
109
110                 for (alias = new_serv.s_aliases; *alias; ++alias) {
111                         size = strlen(*alias);
112                         memcpy(p, *alias, size);
113                         *alias = p;
114                         p += size + 1;
115                 }
116         }
117
118         memcpy(buffer, &new_serv, sizeof(struct servent));
119         TRACE_OUT(services_marshal_func);
120         return (NS_SUCCESS);
121 }
122
123 static int
124 services_lookup_func(const char *key, size_t key_size, char **buffer,
125         size_t *buffer_size)
126 {
127         enum nss_lookup_type lookup_type;
128         char    *name = NULL;
129         char    *proto = NULL;
130         size_t  size, size2;
131         int     port;
132
133         struct servent *result;
134
135         TRACE_IN(services_lookup_func);
136
137         assert(buffer != NULL);
138         assert(buffer_size != NULL);
139
140         if (key_size < sizeof(enum nss_lookup_type)) {
141                 TRACE_OUT(passwd_lookup_func);
142                 return (NS_UNAVAIL);
143         }
144         memcpy(&lookup_type, key, sizeof(enum nss_lookup_type));
145
146         switch (lookup_type) {
147         case nss_lt_name:
148                 size = key_size - sizeof(enum nss_lookup_type);
149                 name = calloc(1, size + 1);
150                 assert(name != NULL);
151                 memcpy(name, key + sizeof(enum nss_lookup_type), size);
152
153                 size2 = strlen(name) + 1;
154
155                 if (size2 < size)
156                         proto = name + size2;
157                 else
158                         proto = NULL;
159                 break;
160         case nss_lt_id:
161                 if (key_size < sizeof(enum nss_lookup_type) +
162                         sizeof(int)) {
163                         TRACE_OUT(passwd_lookup_func);
164                         return (NS_UNAVAIL);
165                 }
166
167                 memcpy(&port, key + sizeof(enum nss_lookup_type),
168                         sizeof(int));
169
170                 size = key_size - sizeof(enum nss_lookup_type) - sizeof(int);
171                 if (size > 0) {
172                         proto = calloc(1, size + 1);
173                         assert(proto != NULL);
174                         memcpy(proto, key + sizeof(enum nss_lookup_type) +
175                                 sizeof(int), size);
176                 }
177                 break;
178         default:
179                 TRACE_OUT(passwd_lookup_func);
180                 return (NS_UNAVAIL);
181         }
182
183         switch (lookup_type) {
184         case nss_lt_name:
185                 result = getservbyname(name, proto);
186                 free(name);
187                 break;
188         case nss_lt_id:
189                 result = getservbyport(port, proto);
190                 free(proto);
191                 break;
192         default:
193                 /* SHOULD NOT BE REACHED */
194                 break;
195         }
196
197         if (result != NULL) {
198                 services_marshal_func(result, NULL, buffer_size);
199                 *buffer = malloc(*buffer_size);
200                 assert(*buffer != NULL);
201                 services_marshal_func(result, *buffer, buffer_size);
202         }
203
204         TRACE_OUT(services_lookup_func);
205         return (result == NULL ? NS_NOTFOUND : NS_SUCCESS);
206 }
207
208 static void *
209 services_mp_init_func(void)
210 {
211         TRACE_IN(services_mp_init_func);
212         setservent(0);
213         TRACE_OUT(services_mp_init_func);
214
215         return (NULL);
216 }
217
218 static int
219 services_mp_lookup_func(char **buffer, size_t *buffer_size, void *mdata)
220 {
221         struct servent *result;
222
223         TRACE_IN(services_mp_lookup_func);
224         result = getservent();
225         if (result != NULL) {
226                 services_marshal_func(result, NULL, buffer_size);
227                 *buffer = malloc(*buffer_size);
228                 assert(*buffer != NULL);
229                 services_marshal_func(result, *buffer, buffer_size);
230         }
231
232         TRACE_OUT(services_mp_lookup_func);
233         return (result == NULL ? NS_NOTFOUND : NS_SUCCESS);
234 }
235
236 static void
237 services_mp_destroy_func(void *mdata)
238 {
239         TRACE_IN(services_mp_destroy_func);
240         TRACE_OUT(services_mp_destroy_func);
241 }
242
243 struct agent *
244 init_services_agent(void)
245 {
246         struct common_agent     *retval;
247         TRACE_IN(init_services_agent);
248
249         retval = calloc(1, sizeof(*retval));
250         assert(retval != NULL);
251
252         retval->parent.name = strdup("services");
253         assert(retval->parent.name != NULL);
254
255         retval->parent.type = COMMON_AGENT;
256         retval->lookup_func = services_lookup_func;
257
258         TRACE_OUT(init_services_agent);
259         return ((struct agent *)retval);
260 }
261
262 struct agent *
263 init_services_mp_agent(void)
264 {
265         struct multipart_agent  *retval;
266
267         TRACE_IN(init_services_mp_agent);
268         retval = calloc(1,
269                 sizeof(*retval));
270         assert(retval != NULL);
271
272         retval->parent.name = strdup("services");
273         retval->parent.type = MULTIPART_AGENT;
274         retval->mp_init_func = services_mp_init_func;
275         retval->mp_lookup_func = services_mp_lookup_func;
276         retval->mp_destroy_func = services_mp_destroy_func;
277         assert(retval->parent.name != NULL);
278
279         TRACE_OUT(init_services_mp_agent);
280         return ((struct agent *)retval);
281 }