5 * Copyright (C) 2007-2010 Intel Corporation. All rights reserved.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
35 #define RESOLVER_FLAG_PUBLIC (1 << 0)
38 struct connman_resolver *resolver;
45 static GSList *entry_list = NULL;
46 static GSList *resolver_list = NULL;
48 static void remove_entries(GSList *entries)
52 for (list = entries; list; list = list->next) {
53 struct entry_data *entry = list->data;
54 struct connman_resolver *resolver = entry->resolver;
56 entry_list = g_slist_remove(entry_list, entry);
58 if (resolver && resolver->remove)
59 resolver->remove(entry->interface, entry->domain,
62 g_free(entry->server);
63 g_free(entry->domain);
64 g_free(entry->interface);
68 g_slist_free(entries);
71 static gint compare_priority(gconstpointer a, gconstpointer b)
73 const struct connman_resolver *resolver1 = a;
74 const struct connman_resolver *resolver2 = b;
76 return resolver2->priority - resolver1->priority;
80 * connman_resolver_register:
81 * @resolver: resolver module
83 * Register a new resolver module
85 * Returns: %0 on success
87 int connman_resolver_register(struct connman_resolver *resolver)
91 DBG("resolver %p name %s", resolver, resolver->name);
93 resolver_list = g_slist_insert_sorted(resolver_list, resolver,
96 if (resolver->append == NULL)
99 for (list = entry_list; list; list = list->next) {
100 struct entry_data *entry = list->data;
105 if (resolver->append(entry->interface, entry->domain,
107 entry->resolver = resolver;
114 * connman_resolver_unregister:
115 * @resolver: resolver module
117 * Remove a previously registered resolver module
119 void connman_resolver_unregister(struct connman_resolver *resolver)
121 GSList *list, *matches = NULL;
123 DBG("resolver %p name %s", resolver, resolver->name);
125 resolver_list = g_slist_remove(resolver_list, resolver);
127 for (list = entry_list; list; list = list->next) {
128 struct entry_data *entry = list->data;
130 if (entry->resolver != resolver)
133 matches = g_slist_append(matches, entry);
136 remove_entries(matches);
139 static int append_resolver(const char *interface, const char *domain,
140 const char *server, unsigned int flags)
142 struct entry_data *entry;
145 DBG("interface %s domain %s server %s flags %d",
146 interface, domain, server, flags);
151 entry = g_try_new0(struct entry_data, 1);
155 entry->interface = g_strdup(interface);
156 entry->domain = g_strdup(domain);
157 entry->server = g_strdup(server);
158 entry->flags = flags;
160 entry_list = g_slist_append(entry_list, entry);
162 for (list = resolver_list; list; list = list->next) {
163 struct connman_resolver *resolver = list->data;
165 if (resolver->append == NULL)
168 if (resolver->append(interface, domain, server) == 0) {
169 entry->resolver = resolver;
178 * connman_resolver_append:
179 * @interface: network interface
180 * @domain: domain limitation
181 * @server: server address
183 * Append resolver server address to current list
185 int connman_resolver_append(const char *interface, const char *domain,
188 DBG("interface %s domain %s server %s", interface, domain, server);
190 return append_resolver(interface, domain, server, 0);
194 * connman_resolver_remove:
195 * @interface: network interface
196 * @domain: domain limitation
197 * @server: server address
199 * Remover resolver server address from current list
201 int connman_resolver_remove(const char *interface, const char *domain,
204 GSList *list, *matches = NULL;
206 DBG("interface %s domain %s server %s", interface, domain, server);
211 for (list = entry_list; list; list = list->next) {
212 struct entry_data *entry = list->data;
214 if (interface != NULL &&
215 g_strcmp0(entry->interface, interface) != 0)
218 if (domain != NULL && g_strcmp0(entry->domain, domain) != 0)
221 if (g_strcmp0(entry->server, server) != 0)
224 matches = g_slist_append(matches, entry);
230 remove_entries(matches);
236 * connman_resolver_remove_all:
237 * @interface: network interface
239 * Remove all resolver server address for the specified interface
241 int connman_resolver_remove_all(const char *interface)
243 GSList *list, *matches = NULL;
245 DBG("interface %s", interface);
247 if (interface == NULL)
250 for (list = entry_list; list; list = list->next) {
251 struct entry_data *entry = list->data;
253 if (g_strcmp0(entry->interface, interface) != 0)
256 matches = g_slist_append(matches, entry);
262 remove_entries(matches);
268 * connman_resolver_append_public_server:
269 * @server: server address
271 * Append public resolver server address to current list
273 int connman_resolver_append_public_server(const char *server)
275 DBG("server %s", server);
277 return append_resolver(NULL, NULL, server, RESOLVER_FLAG_PUBLIC);
281 * connman_resolver_remove_public_server:
282 * @server: server address
284 * Remove public resolver server address to current list
286 int connman_resolver_remove_public_server(const char *server)
288 DBG("server %s", server);
290 return connman_resolver_remove(NULL, NULL, server);
293 static int selftest_append(const char *interface, const char *domain,
296 DBG("server %s", server);
301 static int selftest_remove(const char *interface, const char *domain,
304 DBG("server %s", server);
309 static struct connman_resolver selftest_resolver = {
311 .priority = CONNMAN_RESOLVER_PRIORITY_HIGH + 42,
312 .append = selftest_append,
313 .remove = selftest_remove,
316 int __connman_resolver_selftest(void)
318 connman_resolver_append("wlan0", "lwn.net", "192.168.0.1");
320 connman_resolver_register(&selftest_resolver);
322 connman_resolver_append("eth0", "moblin.org", "192.168.42.1");
323 connman_resolver_append("wlan0", "lwn.net", "192.168.0.2");
325 connman_resolver_append_public_server("8.8.8.8");
327 connman_resolver_remove_public_server("8.8.8.8");
329 connman_resolver_remove_all("wlan0");
331 connman_resolver_unregister(&selftest_resolver);
336 static int resolvfile_append(const char *interface, const char *domain,
343 DBG("interface %s server %s", interface, server);
345 if (interface == NULL)
348 old_umask = umask(022);
350 fd = open("/etc/resolv.conf", O_RDWR | O_CREAT,
351 S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
357 if (ftruncate(fd, 0) < 0) {
364 cmd = g_strdup_printf("# Generated by Connection Manager\n"
366 "nameserver %s\n", server);
368 len = write(fd, cmd, strlen(cmd));
383 static int resolvfile_remove(const char *interface, const char *domain,
386 DBG("interface %s server %s", interface, server);
391 static struct connman_resolver resolvfile_resolver = {
392 .name = "resolvfile",
393 .priority = CONNMAN_RESOLVER_PRIORITY_LOW,
394 .append = resolvfile_append,
395 .remove = resolvfile_remove,
398 int __connman_resolver_init(void)
402 return connman_resolver_register(&resolvfile_resolver);
405 void __connman_resolver_cleanup(void)
409 connman_resolver_unregister(&resolvfile_resolver);