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 <stdio.h>
  27 #include <errno.h>
  28 #include <unistd.h>
  29 #include <stdlib.h>
  30 #include <signal.h>
  31 #include <string.h>
  32 #include <sys/wait.h>
  33 #include <sys/ioctl.h>
  34 #include <sys/socket.h>
  35 #include <arpa/inet.h>
  36 #include <net/if.h>
  37
  38 #include <glib.h>
  39 #include <gdbus.h>
  40
  41 #include <connman/plugin.h>
  42 #include <connman/dhcp.h>
  43
  44 #define DHCLIENT_INTF "org.isc.dhclient"
  45 #define DHCLIENT_PATH "/org/isc/dhclient"
  46
  47 static const char *busname;
  48
  49 struct dhclient_task {
  50         GPid pid;
  51         int ifindex;
  52         char *ifname;
  53         struct connman_iface *iface;
  54 };
  55
  56 static GSList *tasks = NULL;
  57
  58 static struct dhclient_task *find_task_by_pid(GPid pid)
  59 {
  60         GSList *list;
  61
  62         for (list = tasks; list; list = list->next) {
  63                 struct dhclient_task *task = list->data;
  64
  65                 if (task->pid == pid)
  66                         return task;
  67         }
  68
  69         return NULL;
  70 }
  71
  72 static struct dhclient_task *find_task_by_index(int index)
  73 {
  74         GSList *list;
  75
  76         for (list = tasks; list; list = list->next) {
  77                 struct dhclient_task *task = list->data;
  78
  79                 if (task->ifindex == index)
  80                         return task;
  81         }
  82
  83         return NULL;
  84 }
  85
  86 static void kill_task(struct dhclient_task *task)
  87 {
  88         if (task->pid > 0)
  89                 kill(task->pid, SIGTERM);
  90 }
  91
  92 static void task_died(GPid pid, gint status, gpointer data)
  93 {
  94         struct dhclient_task *task = data;
  95         char pathname[PATH_MAX];
  96
  97         if (WIFEXITED(status))
  98                 printf("[DHCP] exit status %d for %s\n",
  99                                         WEXITSTATUS(status), task->ifname);
 100         else
 101                 printf("[DHCP] signal %d killed %s\n",
 102                                         WTERMSIG(status), task->ifname);
 103
 104         g_spawn_close_pid(pid);
 105         task->pid = 0;
 106
 107         tasks = g_slist_remove(tasks, task);
 108
 109         snprintf(pathname, sizeof(pathname) - 1,
 110                         "%s/dhclient.%s.pid", STATEDIR, task->ifname);
 111         unlink(pathname);
 112
 113         snprintf(pathname, sizeof(pathname) - 1,
 114                         "%s/dhclient.%s.leases", STATEDIR, task->ifname);
 115         unlink(pathname);
 116
 117         free(task->ifname);
 118
 119         g_free(task);
 120 }
 121
 122 static void task_setup(gpointer data)
 123 {
 124         struct dhclient_task *task = data;
 125
 126         printf("[DHCP] setup %s\n", task->ifname);
 127 }
 128
 129 static int dhclient_request(struct connman_iface *iface)
 130 {
 131         struct ifreq ifr;
 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         int sk, err;
 136
 137         sk = socket(PF_INET, SOCK_DGRAM, 0);
 138         if (sk < 0)
 139                 return -EIO;
 140
 141         memset(&ifr, 0, sizeof(ifr));
 142         ifr.ifr_ifindex = iface->index;
 143
 144         err = ioctl(sk, SIOCGIFNAME, &ifr);
 145
 146         close(sk);
 147
 148         if (err < 0)
 149                 return -EIO;
 150
 151         task = g_try_new0(struct dhclient_task, 1);
 152         if (task == NULL)
 153                 return -ENOMEM;
 154
 155         task->ifindex = iface->index;
 156         task->ifname = strdup(ifr.ifr_name);
 157         task->iface = iface;
 158
 159         if (task->ifname == NULL) {
 160                 g_free(task);
 161                 return -ENOMEM;
 162         }
 163
 164         printf("[DHCP] request %s\n", task->ifname);
 165
 166         snprintf(address, sizeof(address) - 1, "BUSNAME=%s", busname);
 167         snprintf(pidfile, sizeof(pidfile) - 1,
 168                         "%s/dhclient.%s.pid", STATEDIR, task->ifname);
 169         snprintf(leases, sizeof(leases) - 1,
 170                         "%s/dhclient.%s.leases", STATEDIR, task->ifname);
 171         snprintf(config, sizeof(config) - 1, "%s/dhclient.conf", SCRIPTDIR);
 172         snprintf(script, sizeof(script) - 1, "%s/dhclient-script", SCRIPTDIR);
 173
 174         argv[0] = DHCLIENT;
 175         argv[1] = "-d";
 176         argv[2] = "-q";
 177         argv[3] = "-n";
 178         argv[4] = "-e";
 179         argv[5] = address;
 180         argv[6] = "-pf";
 181         argv[7] = pidfile;
 182         argv[8] = "-lf";
 183         argv[9] = leases;
 184         argv[10] = "-cf";
 185         argv[11] = config;
 186         argv[12] = "-sf";
 187         argv[13] = script;
 188         argv[14] = task->ifname;
 189         argv[15] = NULL;
 190
 191         envp[0] = NULL;
 192
 193         if (g_spawn_async(NULL, argv, envp, G_SPAWN_DO_NOT_REAP_CHILD,
 194                                 task_setup, task, &task->pid, NULL) == FALSE) {
 195                 printf("Failed to spawn dhclient\n");
 196                 return -1;
 197         }
 198
 199         tasks = g_slist_append(tasks, task);
 200
 201         g_child_watch_add(task->pid, task_died, task);
 202
 203         printf("[DHCP] executed %s with pid %d\n", DHCLIENT, task->pid);
 204
 205         return 0;
 206 }
 207
 208 static int dhclient_release(struct connman_iface *iface)
 209 {
 210         struct dhclient_task *task;
 211
 212         task = find_task_by_index(iface->index);
 213         if (task == NULL)
 214                 return -ENODEV;
 215
 216         printf("[DHCP] release %s\n", task->ifname);
 217
 218         tasks = g_slist_remove(tasks, task);
 219
 220         kill_task(task);
 221
 222         return 0;
 223 }
 224
 225 static struct connman_dhcp_driver dhclient_driver = {
 226         .name           = "dhclient",
 227         .request        = dhclient_request,
 228         .release        = dhclient_release,
 229 };
 230
 231 static DBusHandlerResult dhclient_filter(DBusConnection *conn,
 232                                                 DBusMessage *msg, void *data)
 233 {
 234         DBusMessageIter iter, dict;
 235         dbus_uint32_t pid;
 236         struct dhclient_task *task;
 237         struct connman_ipv4 ipv4;
 238         const char *text, *key, *value;
 239
 240         if (dbus_message_is_method_call(msg, DHCLIENT_INTF, "notify") == FALSE)
 241                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 242
 243         memset(&ipv4, 0, sizeof(ipv4));
 244
 245         dbus_message_iter_init(msg, &iter);
 246
 247         dbus_message_iter_get_basic(&iter, &pid);
 248         dbus_message_iter_next(&iter);
 249
 250         dbus_message_iter_get_basic(&iter, &text);
 251         dbus_message_iter_next(&iter);
 252
 253         printf("[DHCP] change %d to %s\n", pid, text);
 254
 255         task = find_task_by_pid(pid);
 256         if (task == NULL)
 257                 return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
 258
 259         dbus_message_iter_recurse(&iter, &dict);
 260
 261         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
 262                 DBusMessageIter entry;
 263
 264                 dbus_message_iter_recurse(&dict, &entry);
 265                 dbus_message_iter_get_basic(&entry, &key);
 266                 dbus_message_iter_next(&entry);
 267                 dbus_message_iter_get_basic(&entry, &value);
 268
 269                 printf("[DHCP] %s = %s\n", key, value);
 270
 271                 if (strcmp(key, "new_ip_address") == 0)
 272                         inet_aton(value, &ipv4.address);
 273
 274                 if (strcmp(key, "new_subnet_mask") == 0)
 275                         inet_aton(value, &ipv4.netmask);
 276
 277                 if (strcmp(key, "new_routers") == 0)
 278                         inet_aton(value, &ipv4.gateway);
 279
 280                 if (strcmp(key, "new_network_number") == 0)
 281                         inet_aton(value, &ipv4.network);
 282
 283                 if (strcmp(key, "new_broadcast_address") == 0)
 284                         inet_aton(value, &ipv4.broadcast);
 285
 286                 if (strcmp(key, "new_domain_name_servers") == 0)
 287                         inet_aton(value, &ipv4.nameserver);
 288
 289                 dbus_message_iter_next(&dict);
 290         }
 291
 292         if (strcmp(text, "PREINIT") == 0)
 293                 connman_dhcp_update(task->iface,
 294                                         CONNMAN_DHCP_STATE_INIT, &ipv4);
 295         else if (strcmp(text, "BOUND") == 0 || strcmp(text, "REBOOT") == 0)
 296                 connman_dhcp_update(task->iface,
 297                                         CONNMAN_DHCP_STATE_BOUND, &ipv4);
 298         else if (strcmp(text, "RENEW") == 0 || strcmp(text, "REBIND") == 0)
 299                 connman_dhcp_update(task->iface,
 300                                         CONNMAN_DHCP_STATE_RENEW, &ipv4);
 301         else
 302                 connman_dhcp_update(task->iface,
 303                                         CONNMAN_DHCP_STATE_FAILED, NULL);
 304
 305         return DBUS_HANDLER_RESULT_HANDLED;
 306 }
 307
 308 static DBusConnection *connection;
 309
 310 static int plugin_init(void)
 311 {
 312         gchar *filter;
 313
 314         connection = dbus_bus_get(DBUS_BUS_SYSTEM, NULL);
 315
 316         busname = dbus_bus_get_unique_name(connection);
 317
 318         busname = "org.freedesktop.connman";
 319
 320         dbus_connection_add_filter(connection, dhclient_filter, NULL, NULL);
 321
 322         filter = g_strdup_printf("interface=%s,path=%s",
 323                                                 DHCLIENT_INTF, DHCLIENT_PATH);
 324
 325         dbus_bus_add_match(connection, filter, NULL);
 326
 327         g_free(filter);
 328
 329         connman_dhcp_register(&dhclient_driver);
 330
 331         return 0;
 332 }
 333
 334 static void plugin_exit(void)
 335 {
 336         GSList *list;
 337
 338         for (list = tasks; list; list = list->next) {
 339                 struct dhclient_task *task = list->data;
 340
 341                 printf("[DHCP] killing process %d\n", task->pid);
 342
 343                 kill_task(task);
 344         }
 345
 346         g_slist_free(tasks);
 347
 348         connman_dhcp_unregister(&dhclient_driver);
 349
 350         dbus_connection_unref(connection);
 351 }
 352
 353 CONNMAN_PLUGIN_DEFINE("dhclient", "ISC DHCP client plugin", VERSION,
 354                                                 plugin_init, plugin_exit)