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