git.maemo.org Git - connman/blob - plugins/dhclient.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2008  Intel Corporation. All rights reserved.
   6  *
   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.
  10  *
  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.
  15  *
  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
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <sys/wait.h>
  27 #include <glib/gstdio.h>
  28
  29 #include <connman/plugin.h>
  30 #include <connman/driver.h>
  31 #include <connman/dbus.h>
  32 #include <connman/log.h>
  33
  34 #include "inet.h"
  35
  36 #define DHCLIENT_INTF "org.isc.dhclient"
  37 #define DHCLIENT_PATH "/org/isc/dhclient"
  38
  39 static const char *busname;
  40
  41 struct dhclient_task {
  42         GPid pid;
  43         int ifindex;
  44         gchar *ifname;
  45         struct connman_element *element;
  46 };
  47
  48 static GSList *task_list = NULL;
  49
  50 static struct dhclient_task *find_task_by_pid(GPid pid)
  51 {
  52         GSList *list;
  53
  54         for (list = task_list; list; list = list->next) {
  55                 struct dhclient_task *task = list->data;
  56
  57                 if (task->pid == pid)
  58                         return task;
  59         }
  60
  61         return NULL;
  62 }
  63
  64 static struct dhclient_task *find_task_by_index(int index)
  65 {
  66         GSList *list;
  67
  68         for (list = task_list; list; list = list->next) {
  69                 struct dhclient_task *task = list->data;
  70
  71                 if (task->ifindex == index)
  72                         return task;
  73         }
  74
  75         return NULL;
  76 }
  77
  78 static void kill_task(struct dhclient_task *task)
  79 {
  80         DBG("task %p name %s pid %d", task, task->ifname, task->pid);
  81
  82         if (task->pid > 0)
  83                 kill(task->pid, SIGTERM);
  84 }
  85
  86 static void unlink_task(struct dhclient_task *task)
  87 {
  88         gchar *pathname;
  89
  90         DBG("task %p name %s pid %d", task, task->ifname, task->pid);
  91
  92         pathname = g_strdup_printf("%s/dhclient.%s.pid",
  93                                                 STATEDIR, task->ifname);
  94         g_unlink(pathname);
  95         g_free(pathname);
  96
  97         pathname = g_strdup_printf("%s/dhclient.%s.leases",
  98                                                 STATEDIR, task->ifname);
  99         g_unlink(pathname);
 100         g_free(pathname);
 101 }
 102
 103 static void task_died(GPid pid, gint status, gpointer data)
 104 {
 105         struct dhclient_task *task = data;
 106
 107         if (WIFEXITED(status))
 108                 DBG("exit status %d for %s", WEXITSTATUS(status), task->ifname);
 109         else
 110                 DBG("signal %d killed %s", WTERMSIG(status), task->ifname);
 111
 112         g_spawn_close_pid(pid);
 113         task->pid = 0;
 114
 115         task_list = g_slist_remove(task_list, task);
 116
 117         unlink_task(task);
 118
 119         g_free(task->ifname);
 120         g_free(task);
 121 }
 122
 123 static void task_setup(gpointer data)
 124 {
 125         struct dhclient_task *task = data;
 126
 127         DBG("task %p name %s", task, task->ifname);
 128 }
 129
 130 static int dhclient_probe(struct connman_element *element)
 131 {
 132         struct dhclient_task *task;
 133         char *argv[16], *envp[1], address[128], pidfile[PATH_MAX];
 134         char leases[PATH_MAX], config[PATH_MAX], script[PATH_MAX];
 135
 136         DBG("element %p name %s", element, element->name);
 137
 138         task = g_try_new0(struct dhclient_task, 1);
 139         if (task == NULL)
 140                 return -ENOMEM;
 141
 142         task->ifindex = element->index;
 143         task->ifname = inet_index2name(element->index);
 144         task->element = element;
 145
 146         if (task->ifname == NULL) {
 147                 g_free(task);
 148                 return -ENOMEM;
 149         }
 150
 151         DBG("request %s", task->ifname);
 152
 153         snprintf(address, sizeof(address) - 1, "BUSNAME=%s", busname);
 154         snprintf(pidfile, sizeof(pidfile) - 1,
 155                         "%s/dhclient.%s.pid", STATEDIR, task->ifname);
 156         snprintf(leases, sizeof(leases) - 1,
 157                         "%s/dhclient.%s.leases", STATEDIR, task->ifname);
 158         snprintf(config, sizeof(config) - 1, "%s/dhclient.conf", SCRIPTDIR);
 159         snprintf(script, sizeof(script) - 1, "%s/dhclient-script", SCRIPTDIR);
 160
 161         argv[0] = DHCLIENT;
 162         argv[1] = "-d";
 163         argv[2] = "-q";
 164         argv[3] = "-n";
 165         argv[4] = "-e";
 166         argv[5] = address;
 167         argv[6] = "-pf";
 168         argv[7] = pidfile;
 169         argv[8] = "-lf";
 170         argv[9] = leases;
 171         argv[10] = "-cf";
 172         argv[11] = config;
 173         argv[12] = "-sf";
 174         argv[13] = script;
 175         argv[14] = task->ifname;
 176         argv[15] = NULL;
 177
 178         envp[0] = NULL;
 179
 180         if (g_spawn_async(NULL, argv, envp, G_SPAWN_DO_NOT_REAP_CHILD,
 181                                 task_setup, task, &task->pid, NULL) == FALSE) {
 182                 connman_error("Failed to spawn dhclient");
 183                 return -1;
 184         }
 185
 186         task_list = g_slist_append(task_list, task);
 187
 188         g_child_watch_add(task->pid, task_died, task);
 189
 190         DBG("executed %s with pid %d", DHCLIENT, task->pid);
 191
 192         return 0;
 193 }
 194
 195 static void dhclient_remove(struct connman_element *element)
 196 {
 197         struct dhclient_task *task;
 198
 199         DBG("element %p name %s", element, element->name);
 200
 201         task = find_task_by_index(element->index);
 202         if (task != NULL)
 203                 task_list = g_slist_remove(task_list, task);
 204
 205         if (task == NULL)
 206                 return;
 207
 208         DBG("release %s", task->ifname);
 209
 210         kill_task(task);
 211 }
 212
 213 static struct connman_driver dhclient_driver = {
 214         .name           = "dhclient",
 215         .type           = CONNMAN_ELEMENT_TYPE_DHCP,
 216         .probe          = dhclient_probe,
 217         .remove         = dhclient_remove,
 218 };
 219
 220 static DBusHandlerResult dhclient_filter(DBusConnection *conn,
 221                                                 DBusMessage *msg, void *data)
 222 {
 223         DBusMessageIter iter, dict;
 224         dbus_uint32_t pid;
 225         struct dhclient_task *task;
 226         const char *text, *key, *value;
 227
 228         if (dbus_message_is_method_call(msg, DHCLIENT_INTF, "notify") == FALSE)
 229                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 230
 231         dbus_message_iter_init(msg, &iter);
 232
 233         dbus_message_iter_get_basic(&iter, &pid);
 234         dbus_message_iter_next(&iter);
 235
 236         dbus_message_iter_get_basic(&iter, &text);
 237         dbus_message_iter_next(&iter);
 238
 239         DBG("change %d to %s", pid, text);
 240
 241         task = find_task_by_pid(pid);
 242
 243         if (task == NULL)
 244                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 245
 246         dbus_message_iter_recurse(&iter, &dict);
 247
 248         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
 249                 DBusMessageIter entry;
 250
 251                 dbus_message_iter_recurse(&dict, &entry);
 252                 dbus_message_iter_get_basic(&entry, &key);
 253                 dbus_message_iter_next(&entry);
 254                 dbus_message_iter_get_basic(&entry, &value);
 255
 256                 DBG("%s = %s", key, value);
 257
 258                 if (g_ascii_strcasecmp(key, "new_ip_address") == 0) {
 259                         g_free(task->element->ipv4.address);
 260                         task->element->ipv4.address = g_strdup(value);
 261                 }
 262
 263                 if (g_ascii_strcasecmp(key, "new_subnet_mask") == 0) {
 264                         g_free(task->element->ipv4.netmask);
 265                         task->element->ipv4.netmask = g_strdup(value);
 266                 }
 267
 268                 if (g_ascii_strcasecmp(key, "new_routers") == 0) {
 269                         g_free(task->element->ipv4.gateway);
 270                         task->element->ipv4.gateway = g_strdup(value);
 271                 }
 272
 273                 if (g_ascii_strcasecmp(key, "new_network_number") == 0) {
 274                         g_free(task->element->ipv4.network);
 275                         task->element->ipv4.network = g_strdup(value);
 276                 }
 277
 278                 if (g_ascii_strcasecmp(key, "new_broadcast_address") == 0) {
 279                         g_free(task->element->ipv4.broadcast);
 280                         task->element->ipv4.broadcast = g_strdup(value);
 281                 }
 282
 283                 if (g_ascii_strcasecmp(key, "new_domain_name_servers") == 0) {
 284                         g_free(task->element->ipv4.nameserver);
 285                         task->element->ipv4.nameserver = g_strdup(value);
 286                 }
 287
 288                 dbus_message_iter_next(&dict);
 289         }
 290
 291         if (g_ascii_strcasecmp(text, "PREINIT") == 0) {
 292         } else if (g_ascii_strcasecmp(text, "BOUND") == 0 ||
 293                                 g_ascii_strcasecmp(text, "REBOOT") == 0) {
 294                 struct connman_element *element;
 295                 element = connman_element_create(NULL);
 296                 element->type = CONNMAN_ELEMENT_TYPE_IPV4;
 297                 element->index = task->ifindex;
 298                 connman_element_update(task->element);
 299                 connman_element_register(element, task->element);
 300         } else if (g_ascii_strcasecmp(text, "RENEW") == 0 ||
 301                                 g_ascii_strcasecmp(text, "REBIND") == 0) {
 302                 connman_element_update(task->element);
 303         } else {
 304         }
 305
 306         return DBUS_HANDLER_RESULT_HANDLED;
 307 }
 308
 309 static DBusConnection *connection;
 310
 311 static int dhclient_init(void)
 312 {
 313         gchar *filter;
 314         int err;
 315
 316         connection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
 317
 318         busname = dbus_bus_get_unique_name(connection);
 319         busname = CONNMAN_SERVICE;
 320
 321         dbus_connection_add_filter(connection, dhclient_filter, NULL, NULL);
 322
 323         filter = g_strdup_printf("interface=%s,path=%s",
 324                                                 DHCLIENT_INTF, DHCLIENT_PATH);
 325
 326         dbus_bus_add_match(connection, filter, NULL);
 327
 328         g_free(filter);
 329
 330         err = connman_driver_register(&dhclient_driver);
 331         if (err < 0) {
 332                 dbus_connection_unref(connection);
 333                 return err;
 334         }
 335
 336         return 0;
 337 }
 338
 339 static void dhclient_exit(void)
 340 {
 341         GSList *list;
 342
 343         for (list = task_list; list; list = list->next) {
 344                 struct dhclient_task *task = list->data;
 345
 346                 DBG("killing process %d", task->pid);
 347
 348                 kill_task(task);
 349                 unlink_task(task);
 350         }
 351
 352         g_slist_free(task_list);
 353
 354         connman_driver_unregister(&dhclient_driver);
 355
 356         dbus_connection_unref(connection);
 357 }
 358
 359 CONNMAN_PLUGIN_DEFINE(dhclient, "ISC DHCP client plugin", VERSION,
 360                                                 dhclient_init, dhclient_exit)