plugins/dhclient.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2009  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 <arpa/inet.h>
  30
  31 #include <glib.h>
  32
  33 #define CONNMAN_API_SUBJECT_TO_CHANGE
  34 #include <connman/plugin.h>
  35 #include <connman/dhcp.h>
  36 #include <connman/task.h>
  37 #include <connman/log.h>
  38
  39 #if 0
  40 static unsigned char netmask2prefixlen(const char *netmask)
  41 {
  42         unsigned char bits = 0;
  43         in_addr_t mask = inet_network(netmask);
  44         in_addr_t host = ~mask;
  45
  46         /* a valid netmask must be 2^n - 1 */
  47         if ((host & (host + 1)) != 0)
  48                 return -1;
  49
  50         for (; mask; mask <<= 1)
  51                 ++bits;
  52
  53         return bits;
  54 }
  55 #endif
  56
  57 static void dhclient_notify(struct connman_task *task,
  58                                         DBusMessage *msg, void *user_data)
  59 {
  60         struct connman_dhcp *dhcp = user_data;
  61         DBusMessageIter iter, dict;
  62         dbus_uint32_t pid;
  63         const char *text, *key, *value;
  64
  65         dbus_message_iter_init(msg, &iter);
  66
  67         dbus_message_iter_get_basic(&iter, &pid);
  68         dbus_message_iter_next(&iter);
  69
  70         dbus_message_iter_get_basic(&iter, &text);
  71         dbus_message_iter_next(&iter);
  72
  73         DBG("change %d to %s", pid, text);
  74
  75         dbus_message_iter_recurse(&iter, &dict);
  76
  77         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
  78                 DBusMessageIter entry;
  79
  80                 dbus_message_iter_recurse(&dict, &entry);
  81                 dbus_message_iter_get_basic(&entry, &key);
  82                 dbus_message_iter_next(&entry);
  83                 dbus_message_iter_get_basic(&entry, &value);
  84
  85                 DBG("%s = %s", key, value);
  86
  87                 if (g_strcmp0(key, "new_ip_address") == 0) {
  88                         connman_dhcp_set_value(dhcp, "Address", value);
  89                 } else if (g_strcmp0(key, "new_subnet_mask") == 0) {
  90                         connman_dhcp_set_value(dhcp, "Netmask", value);
  91                 } else if (g_strcmp0(key, "new_routers") == 0) {
  92                         connman_dhcp_set_value(dhcp, "Gateway", value);
  93                 } else if (g_strcmp0(key, "new_network_number") == 0) {
  94                         connman_dhcp_set_value(dhcp, "Network", value);
  95                 } else if (g_strcmp0(key, "new_broadcast_address") == 0) {
  96                         connman_dhcp_set_value(dhcp, "Broadcast", value);
  97                 } else if (g_strcmp0(key, "new_domain_name_servers") == 0) {
  98                         connman_dhcp_set_value(dhcp, "Nameserver", value);
  99                 } else if (g_ascii_strcasecmp(key, "new_domain_name") == 0) {
 100                         connman_dhcp_set_value(dhcp, "Domainname", value);
 101                 } else if (g_ascii_strcasecmp(key, "new_domain_search") == 0) {
 102                 } else if (g_ascii_strcasecmp(key, "new_host_name") == 0) {
 103                         connman_dhcp_set_value(dhcp, "Hostname", value);
 104                 } else if (g_ascii_strcasecmp(key, "new_ntp_servers") == 0) {
 105                         connman_dhcp_set_value(dhcp, "Timeserver", value);
 106                 } else if (g_ascii_strcasecmp(key, "new_interface_mtu") == 0) {
 107                         connman_dhcp_set_value(dhcp, "MTU", value);
 108                 }
 109
 110                 dbus_message_iter_next(&dict);
 111         }
 112
 113         if (g_strcmp0(text, "PREINIT") == 0) {
 114         } else if (g_strcmp0(text, "BOUND") == 0 ||
 115                                 g_strcmp0(text, "REBOOT") == 0) {
 116                 connman_dhcp_bound(dhcp);
 117         } else if (g_strcmp0(text, "RENEW") == 0 ||
 118                                 g_strcmp0(text, "REBIND") == 0) {
 119                 connman_dhcp_renew(dhcp);
 120         } else if (g_strcmp0(text, "FAIL") == 0) {
 121                 connman_dhcp_fail(dhcp);
 122         } else {
 123         }
 124 }
 125
 126 struct dhclient_data {
 127         struct connman_task *task;
 128         struct connman_dhcp *dhcp;
 129         char *ifname;
 130 };
 131
 132 static void dhclient_died(struct connman_task *task, void *user_data)
 133 {
 134         struct dhclient_data *dhclient = user_data;
 135
 136         connman_dhcp_unref(dhclient->dhcp);
 137
 138         connman_task_destroy(dhclient->task);
 139         dhclient->task = NULL;
 140
 141         g_free(dhclient->ifname);
 142         g_free(dhclient);
 143 }
 144
 145 static void dhclient_setup(struct connman_task *task, const char *ifname)
 146 {
 147         const char *path, *intf = "org.moblin.connman.Task";
 148
 149         path = connman_task_get_path(task);
 150
 151         connman_task_add_argument(task, "-d", NULL);
 152         connman_task_add_argument(task, "-q", NULL);
 153         connman_task_add_argument(task, "-e", "BUSNAME=org.moblin.connman");
 154         connman_task_add_argument(task, "-e", "BUSINTF=%s", intf);
 155         connman_task_add_argument(task, "-e", "BUSPATH=%s", path);
 156         connman_task_add_argument(task, "-pf", "%s/dhclient.%s.pid",
 157                                                         STATEDIR, ifname);
 158         connman_task_add_argument(task, "-lf", "%s/dhclient.%s.leases",
 159                                                         STATEDIR, ifname);
 160         connman_task_add_argument(task, "-cf", "%s/dhclient.conf", SCRIPTDIR);
 161         connman_task_add_argument(task, "-sf", "%s/dhclient-script", SCRIPTDIR);
 162         connman_task_add_argument(task, ifname, NULL);
 163         connman_task_add_argument(task, "-n", NULL);
 164 }
 165
 166 static void dhclient_unlink(const char *ifname)
 167 {
 168         char *pathname;
 169
 170         pathname = g_strdup_printf("%s/dhclient.%s.pid",
 171                                                 STATEDIR, ifname);
 172         unlink(pathname);
 173         g_free(pathname);
 174
 175         pathname = g_strdup_printf("%s/dhclient.%s.leases",
 176                                                 STATEDIR, ifname);
 177         unlink(pathname);
 178         g_free(pathname);
 179 }
 180
 181 static int dhclient_request(struct connman_dhcp *dhcp)
 182 {
 183         struct dhclient_data *dhclient;
 184
 185         DBG("dhcp %p", dhcp);
 186
 187         if (access(DHCLIENT, X_OK) < 0)
 188                 return -EIO;
 189
 190         dhclient = g_try_new0(struct dhclient_data, 1);
 191         if (dhclient == NULL)
 192                 return -ENOMEM;
 193
 194         dhclient->task = connman_task_create(DHCLIENT);
 195         if (dhclient->task == NULL) {
 196                 g_free(dhclient);
 197                 return -ENOMEM;
 198         }
 199
 200         dhclient->dhcp = connman_dhcp_ref(dhcp);
 201         dhclient->ifname = connman_dhcp_get_interface(dhcp);
 202
 203         dhclient_setup(dhclient->task, dhclient->ifname);
 204
 205         connman_dhcp_set_data(dhcp, dhclient);
 206
 207         connman_task_set_notify(dhclient->task, "Notify",
 208                                                 dhclient_notify, dhcp);
 209
 210         connman_task_run(dhclient->task, dhclient_died, dhclient);
 211
 212         return 0;
 213 }
 214
 215 static int dhclient_release(struct connman_dhcp *dhcp)
 216 {
 217         struct dhclient_data *dhclient = connman_dhcp_get_data(dhcp);
 218
 219         DBG("dhcp %p", dhcp);
 220
 221         if (dhclient->task != NULL)
 222                 connman_task_stop(dhclient->task);
 223
 224         dhclient_unlink(dhclient->ifname);
 225
 226         return 0;
 227 }
 228
 229 static struct connman_dhcp_driver dhclient_driver = {
 230         .name           = "dhclient",
 231         .request        = dhclient_request,
 232         .release        = dhclient_release,
 233 };
 234
 235 static int dhclient_init(void)
 236 {
 237         return connman_dhcp_driver_register(&dhclient_driver);
 238 }
 239
 240 static void dhclient_exit(void)
 241 {
 242         connman_dhcp_driver_unregister(&dhclient_driver);
 243 }
 244
 245 CONNMAN_PLUGIN_DEFINE(dhclient, "ISC DHCP client plugin", VERSION,
 246                 CONNMAN_PLUGIN_PRIORITY_DEFAULT, dhclient_init, dhclient_exit)