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

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007  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/ioctl.h>
  33 #include <sys/socket.h>
  34 #include <arpa/inet.h>
  35 #include <net/if.h>
  36
  37 #include <glib.h>
  38 #include <gdbus.h>
  39
  40 #include <connman/plugin.h>
  41 #include <connman/dhcp.h>
  42
  43 static const char *busname;
  44
  45 struct dhclient_task {
  46         GPid pid;
  47         int ifindex;
  48         char *ifname;
  49         struct connman_iface *iface;
  50 };
  51
  52 static GSList *tasks = NULL;
  53
  54 static struct dhclient_task *find_task_by_pid(GPid pid)
  55 {
  56         GSList *list;
  57
  58         for (list = tasks; list; list = list->next) {
  59                 struct dhclient_task *task = list->data;
  60
  61                 if (task->pid == pid)
  62                         return task;
  63         }
  64
  65         return NULL;
  66 }
  67
  68 static struct dhclient_task *find_task_by_index(int index)
  69 {
  70         GSList *list;
  71
  72         for (list = tasks; list; list = list->next) {
  73                 struct dhclient_task *task = list->data;
  74
  75                 if (task->ifindex == index)
  76                         return task;
  77         }
  78
  79         return NULL;
  80 }
  81
  82 static void kill_task(struct dhclient_task *task)
  83 {
  84         char pathname[PATH_MAX];
  85
  86         kill(task->pid, SIGTERM);
  87
  88         snprintf(pathname, sizeof(pathname) - 1,
  89                         "%s/dhclient.%s.pid", STATEDIR, task->ifname);
  90         unlink(pathname);
  91
  92         snprintf(pathname, sizeof(pathname) - 1,
  93                         "%s/dhclient.%s.leases", STATEDIR, task->ifname);
  94         unlink(pathname);
  95
  96         free(task->ifname);
  97
  98         g_free(task);
  99 }
 100
 101 static int dhclient_request(struct connman_iface *iface)
 102 {
 103         struct ifreq ifr;
 104         struct dhclient_task *task;
 105         char *argv[16], address[128], pidfile[PATH_MAX];
 106         char leases[PATH_MAX], config[PATH_MAX], script[PATH_MAX];
 107         int sk, err;
 108
 109         sk = socket(PF_INET, SOCK_DGRAM, 0);
 110         if (sk < 0)
 111                 return -EIO;
 112
 113         memset(&ifr, 0, sizeof(ifr));
 114         ifr.ifr_ifindex = iface->index;
 115
 116         err = ioctl(sk, SIOCGIFNAME, &ifr);
 117
 118         close(sk);
 119
 120         if (err < 0)
 121                 return -EIO;
 122
 123         task = g_try_new0(struct dhclient_task, 1);
 124         if (task == NULL)
 125                 return -ENOMEM;
 126
 127         task->ifindex = iface->index;
 128         task->ifname = strdup(ifr.ifr_name);
 129         task->iface = iface;
 130
 131         if (task->ifname == NULL) {
 132                 g_free(task);
 133                 return -ENOMEM;
 134         }
 135
 136         printf("[DHCP] request %s\n", task->ifname);
 137
 138         snprintf(address, sizeof(address) - 1, "BUSNAME=%s", busname);
 139         snprintf(pidfile, sizeof(pidfile) - 1,
 140                         "%s/dhclient.%s.pid", STATEDIR, task->ifname);
 141         snprintf(leases, sizeof(leases) - 1,
 142                         "%s/dhclient.%s.leases", STATEDIR, task->ifname);
 143         snprintf(config, sizeof(config) - 1, "%s/dhclient.conf", SCRIPTDIR);
 144         snprintf(script, sizeof(script) - 1, "%s/dhclient-script", SCRIPTDIR);
 145
 146         argv[0] = "/sbin/dhclient";
 147         argv[1] = "-d";
 148         argv[2] = "-q";
 149         argv[3] = "-n";
 150         argv[4] = "-e";
 151         argv[5] = address;
 152         argv[6] = "-pf";
 153         argv[7] = pidfile;
 154         argv[8] = "-lf";
 155         argv[9] = leases;
 156         argv[10] = "-cf";
 157         argv[11] = config;
 158         argv[12] = "-sf";
 159         argv[13] = script;
 160         argv[14] = task->ifname;
 161         argv[15] = NULL;
 162
 163         if (g_spawn_async(NULL, argv, NULL, G_SPAWN_DO_NOT_REAP_CHILD,
 164                                 NULL, NULL, &task->pid, NULL) == FALSE) {
 165                 printf("Failed to spawn dhclient\n");
 166                 return -1;
 167         }
 168
 169         tasks = g_slist_append(tasks, task);
 170
 171         printf("[DHCP] executed with pid %d\n", task->pid);
 172
 173         return 0;
 174 }
 175
 176 static int dhclient_release(struct connman_iface *iface)
 177 {
 178         struct dhclient_task *task;
 179
 180         task = find_task_by_index(iface->index);
 181         if (task == NULL)
 182                 return -ENODEV;
 183
 184         printf("[DHCP] release %s\n", task->ifname);
 185
 186         tasks = g_slist_remove(tasks, task);
 187
 188         kill_task(task);
 189
 190         return 0;
 191 }
 192
 193 static struct connman_dhcp_driver dhclient_driver = {
 194         .name           = "dhclient",
 195         .request        = dhclient_request,
 196         .release        = dhclient_release,
 197 };
 198
 199 static DBusMessage *notify_method(DBusConnection *conn,
 200                                         DBusMessage *msg, void *data)
 201 {
 202         DBusMessageIter iter, dict;
 203         dbus_uint32_t pid;
 204         struct dhclient_task *task;
 205         struct connman_ipv4 ipv4;
 206         const char *text, *key, *value;
 207
 208         memset(&ipv4, 0, sizeof(ipv4));
 209
 210         dbus_message_iter_init(msg, &iter);
 211
 212         dbus_message_iter_get_basic(&iter, &pid);
 213         dbus_message_iter_next(&iter);
 214
 215         dbus_message_iter_get_basic(&iter, &text);
 216         dbus_message_iter_next(&iter);
 217
 218         printf("[DHCP] change %d to %s\n", pid, text);
 219
 220         task = find_task_by_pid(pid);
 221         if (task == NULL)
 222                 return NULL;
 223
 224         dbus_message_iter_recurse(&iter, &dict);
 225
 226         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
 227                 DBusMessageIter entry;
 228
 229                 dbus_message_iter_recurse(&dict, &entry);
 230                 dbus_message_iter_get_basic(&entry, &key);
 231                 dbus_message_iter_next(&entry);
 232                 dbus_message_iter_get_basic(&entry, &value);
 233
 234                 printf("[DHCP] %s = %s\n", key, value);
 235
 236                 if (strcmp(key, "new_ip_address") == 0)
 237                         inet_aton(value, &ipv4.address);
 238
 239                 if (strcmp(key, "new_subnet_mask") == 0)
 240                         inet_aton(value, &ipv4.netmask);
 241
 242                 if (strcmp(key, "new_routers") == 0)
 243                         inet_aton(value, &ipv4.gateway);
 244
 245                 if (strcmp(key, "new_network_number") == 0)
 246                         inet_aton(value, &ipv4.network);
 247
 248                 if (strcmp(key, "new_broadcast_address") == 0)
 249                         inet_aton(value, &ipv4.broadcast);
 250
 251                 if (strcmp(key, "new_domain_name_servers") == 0)
 252                         inet_aton(value, &ipv4.nameserver);
 253
 254                 dbus_message_iter_next(&dict);
 255         }
 256
 257         if (strcmp(text, "PREINIT") == 0)
 258                 connman_dhcp_update(task->iface,
 259                                         CONNMAN_DHCP_STATE_INIT, &ipv4);
 260         else if (strcmp(text, "BOUND") == 0 || strcmp(text, "REBOOT") == 0)
 261                 connman_dhcp_update(task->iface,
 262                                         CONNMAN_DHCP_STATE_BOUND, &ipv4);
 263         else if (strcmp(text, "RENEW") == 0 || strcmp(text, "REBIND") == 0)
 264                 connman_dhcp_update(task->iface,
 265                                         CONNMAN_DHCP_STATE_RENEW, &ipv4);
 266         else
 267                 connman_dhcp_update(task->iface,
 268                                         CONNMAN_DHCP_STATE_FAILED, NULL);
 269
 270         return NULL;
 271 }
 272
 273 static GDBusMethodTable dhclient_methods[] = {
 274         { "notify", "usa{ss}", "", notify_method, G_DBUS_METHOD_FLAG_NOREPLY },
 275         { },
 276 };
 277
 278 static DBusConnection *connection;
 279
 280 static int plugin_init(void)
 281 {
 282         connection = g_dbus_setup_bus(DBUS_BUS_SYSTEM, NULL, NULL);
 283
 284         busname = dbus_bus_get_unique_name(connection);
 285
 286         g_dbus_register_object(connection, "/org/isc/dhclient", NULL, NULL);
 287
 288         g_dbus_register_interface(connection, "/org/isc/dhclient",
 289                                         "org.isc.dhclient",
 290                                         dhclient_methods, NULL, NULL);
 291
 292         connman_dhcp_register(&dhclient_driver);
 293
 294         return 0;
 295 }
 296
 297 static void plugin_exit(void)
 298 {
 299         GSList *list;
 300
 301         for (list = tasks; list; list = list->next) {
 302                 struct dhclient_task *task = list->data;
 303
 304                 printf("[DHCP] killing process %d\n", task->pid);
 305
 306                 kill_task(task);
 307         }
 308
 309         g_slist_free(tasks);
 310
 311         connman_dhcp_unregister(&dhclient_driver);
 312
 313         g_dbus_cleanup_connection(connection);
 314 }
 315
 316 CONNMAN_PLUGIN_DEFINE("dhclient", "ISC DHCP client plugin", VERSION,
 317                                                 plugin_init, plugin_exit)