plugins/ethernet.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2013  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 <errno.h>
  27 #include <net/if.h>
  28 #include <string.h>
  29 #include <sys/ioctl.h>
  30 #include <unistd.h>
  31 #include <stdio.h>
  32
  33 #include <linux/if_vlan.h>
  34 #include <linux/sockios.h>
  35
  36 #ifndef IFF_LOWER_UP
  37 #define IFF_LOWER_UP    0x10000
  38 #endif
  39
  40 #include <glib.h>
  41
  42 #define CONNMAN_API_SUBJECT_TO_CHANGE
  43 #include <connman/technology.h>
  44 #include <connman/plugin.h>
  45 #include <connman/device.h>
  46 #include <connman/inet.h>
  47 #include <connman/rtnl.h>
  48 #include <connman/log.h>
  49 #include <connman/setting.h>
  50
  51 static bool eth_tethering = false;
  52
  53 struct ethernet_data {
  54         int index;
  55         unsigned flags;
  56         unsigned int watch;
  57         struct connman_network *network;
  58 };
  59
  60
  61 static int get_vlan_vid(const char *ifname)
  62 {
  63         struct vlan_ioctl_args vifr;
  64         int vid;
  65         int sk;
  66
  67         memset(&vifr, 0, sizeof(vifr));
  68
  69         sk = socket(AF_INET, SOCK_STREAM, 0);
  70         if (sk < 0)
  71                 return -errno;
  72
  73         vifr.cmd = GET_VLAN_VID_CMD;
  74         strncpy(vifr.device1, ifname, sizeof(vifr.device1));
  75
  76         if(ioctl(sk, SIOCSIFVLAN, &vifr) >= 0)
  77                 vid = vifr.u.VID;
  78         else
  79                 vid = -errno;
  80
  81         close(sk);
  82
  83         return vid;
  84 }
  85
  86 static int eth_network_probe(struct connman_network *network)
  87 {
  88         DBG("network %p", network);
  89
  90         return 0;
  91 }
  92
  93 static void eth_network_remove(struct connman_network *network)
  94 {
  95         DBG("network %p", network);
  96 }
  97
  98 static int eth_network_connect(struct connman_network *network)
  99 {
 100         DBG("network %p", network);
 101
 102         connman_network_set_connected(network, true);
 103
 104         return 0;
 105 }
 106
 107 static int eth_network_disconnect(struct connman_network *network)
 108 {
 109         DBG("network %p", network);
 110
 111         connman_network_set_connected(network, false);
 112
 113         return 0;
 114 }
 115
 116 static struct connman_network_driver eth_network_driver = {
 117         .name           = "cable",
 118         .type           = CONNMAN_NETWORK_TYPE_ETHERNET,
 119         .probe          = eth_network_probe,
 120         .remove         = eth_network_remove,
 121         .connect        = eth_network_connect,
 122         .disconnect     = eth_network_disconnect,
 123 };
 124
 125 static void add_network(struct connman_device *device,
 126                         struct ethernet_data *ethernet)
 127 {
 128         struct connman_network *network;
 129         int index, vid;
 130         char *ifname;
 131
 132         network = connman_network_create("carrier",
 133                                         CONNMAN_NETWORK_TYPE_ETHERNET);
 134         if (!network)
 135                 return;
 136
 137         index = connman_device_get_index(device);
 138         connman_network_set_index(network, index);
 139         ifname = connman_inet_ifname(index);
 140         if (!ifname)
 141                 return;
 142         vid = get_vlan_vid(ifname);
 143
 144         connman_network_set_name(network, "Wired");
 145
 146         if (connman_device_add_network(device, network) < 0) {
 147                 connman_network_unref(network);
 148                 return;
 149         }
 150
 151         if (!eth_tethering) {
 152                 char group[10] = "cable";
 153                 /*
 154                  * Prevent service from starting the reconnect
 155                  * procedure as we do not want the DHCP client
 156                  * to run when tethering.
 157                  */
 158                 if (vid >= 0)
 159                         snprintf(group, sizeof(group), "%03x_cable", vid);
 160
 161                 connman_network_set_group(network, group);
 162         }
 163
 164         ethernet->network = network;
 165         g_free(ifname);
 166 }
 167
 168 static void remove_network(struct connman_device *device,
 169                                 struct ethernet_data *ethernet)
 170 {
 171         if (!ethernet->network)
 172                 return;
 173
 174         connman_device_remove_network(device, ethernet->network);
 175         connman_network_unref(ethernet->network);
 176
 177         ethernet->network = NULL;
 178 }
 179
 180 static void ethernet_newlink(unsigned flags, unsigned change, void *user_data)
 181 {
 182         struct connman_device *device = user_data;
 183         struct ethernet_data *ethernet = connman_device_get_data(device);
 184
 185         DBG("index %d flags %d change %d", ethernet->index, flags, change);
 186
 187         if ((ethernet->flags & IFF_UP) != (flags & IFF_UP)) {
 188                 if (flags & IFF_UP) {
 189                         DBG("power on");
 190                         connman_device_set_powered(device, true);
 191                 } else {
 192                         DBG("power off");
 193                         connman_device_set_powered(device, false);
 194                 }
 195         }
 196
 197         if ((ethernet->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) {
 198                 if (flags & IFF_LOWER_UP) {
 199                         DBG("carrier on");
 200                         add_network(device, ethernet);
 201                 } else {
 202                         DBG("carrier off");
 203                         remove_network(device, ethernet);
 204                 }
 205         }
 206
 207         ethernet->flags = flags;
 208 }
 209
 210 static int eth_dev_probe(struct connman_device *device)
 211 {
 212         struct ethernet_data *ethernet;
 213
 214         DBG("device %p", device);
 215
 216         ethernet = g_try_new0(struct ethernet_data, 1);
 217         if (!ethernet)
 218                 return -ENOMEM;
 219
 220         connman_device_set_data(device, ethernet);
 221
 222         ethernet->index = connman_device_get_index(device);
 223         ethernet->flags = 0;
 224
 225         ethernet->watch = connman_rtnl_add_newlink_watch(ethernet->index,
 226                                                 ethernet_newlink, device);
 227
 228         return 0;
 229 }
 230
 231 static void eth_dev_remove(struct connman_device *device)
 232 {
 233         struct ethernet_data *ethernet = connman_device_get_data(device);
 234
 235         DBG("device %p", device);
 236
 237         connman_device_set_data(device, NULL);
 238
 239         connman_rtnl_remove_watch(ethernet->watch);
 240
 241         remove_network(device, ethernet);
 242
 243         g_free(ethernet);
 244 }
 245
 246 static int eth_dev_enable(struct connman_device *device)
 247 {
 248         struct ethernet_data *ethernet = connman_device_get_data(device);
 249
 250         DBG("device %p", device);
 251
 252         return connman_inet_ifup(ethernet->index);
 253 }
 254
 255 static int eth_dev_disable(struct connman_device *device)
 256 {
 257         struct ethernet_data *ethernet = connman_device_get_data(device);
 258
 259         DBG("device %p", device);
 260
 261         return connman_inet_ifdown(ethernet->index);
 262 }
 263
 264 static struct connman_device_driver eth_dev_driver = {
 265         .name           = "ethernet",
 266         .type           = CONNMAN_DEVICE_TYPE_ETHERNET,
 267         .probe          = eth_dev_probe,
 268         .remove         = eth_dev_remove,
 269         .enable         = eth_dev_enable,
 270         .disable        = eth_dev_disable,
 271 };
 272
 273 static int eth_tech_probe(struct connman_technology *technology)
 274 {
 275         return 0;
 276 }
 277
 278 static void eth_tech_remove(struct connman_technology *technology)
 279 {
 280         DBG("");
 281 }
 282
 283 static GList *eth_interface_list = NULL;
 284
 285 static void eth_tech_add_interface(struct connman_technology *technology,
 286                         int index, const char *name, const char *ident)
 287 {
 288         DBG("index %d name %s ident %s", index, name, ident);
 289
 290         if (g_list_find(eth_interface_list, GINT_TO_POINTER((int)index)))
 291                 return;
 292
 293         eth_interface_list = g_list_prepend(eth_interface_list,
 294                                         (GINT_TO_POINTER((int) index)));
 295 }
 296
 297 static void eth_tech_remove_interface(struct connman_technology *technology,
 298                                                                 int index)
 299 {
 300         DBG("index %d", index);
 301
 302         eth_interface_list = g_list_remove(eth_interface_list,
 303                                         GINT_TO_POINTER((int) index));
 304 }
 305
 306 static void eth_tech_enable_tethering(struct connman_technology *technology,
 307                                                 const char *bridge)
 308 {
 309         GList *list;
 310         struct ethernet_data *ethernet;
 311
 312         for (list = eth_interface_list; list; list = list->next) {
 313                 int index = GPOINTER_TO_INT(list->data);
 314                 struct connman_device *device =
 315                         connman_device_find_by_index(index);
 316
 317                 if (device) {
 318                         ethernet = connman_device_get_data(device);
 319                         if (ethernet)
 320                                 remove_network(device, ethernet);
 321                 }
 322
 323                 connman_technology_tethering_notify(technology, true);
 324
 325                 connman_inet_ifup(index);
 326
 327                 connman_inet_add_to_bridge(index, bridge);
 328
 329                 eth_tethering = true;
 330         }
 331 }
 332
 333 static void eth_tech_disable_tethering(struct connman_technology *technology,
 334                                                 const char *bridge)
 335 {
 336         GList *list;
 337
 338         for (list = eth_interface_list; list; list = list->next) {
 339                 int index = GPOINTER_TO_INT(list->data);
 340                 struct connman_device *device =
 341                         connman_device_find_by_index(index);
 342
 343                 connman_inet_remove_from_bridge(index, bridge);
 344
 345                 connman_technology_tethering_notify(technology, false);
 346
 347                 if (device)
 348                         connman_device_reconnect_service(device);
 349
 350                 eth_tethering = false;
 351         }
 352 }
 353
 354 static int eth_tech_set_tethering(struct connman_technology *technology,
 355                                 const char *identifier, const char *passphrase,
 356                                 const char *bridge, bool enabled)
 357 {
 358         if (!connman_technology_is_tethering_allowed(
 359                         CONNMAN_SERVICE_TYPE_ETHERNET))
 360                 return 0;
 361
 362         DBG("bridge %s enabled %d", bridge, enabled);
 363
 364         if (enabled)
 365                 eth_tech_enable_tethering(technology, bridge);
 366         else
 367                 eth_tech_disable_tethering(technology, bridge);
 368
 369         return 0;
 370 }
 371
 372 static struct connman_technology_driver eth_tech_driver = {
 373         .name                   = "ethernet",
 374         .type                   = CONNMAN_SERVICE_TYPE_ETHERNET,
 375         .probe                  = eth_tech_probe,
 376         .remove                 = eth_tech_remove,
 377         .add_interface          = eth_tech_add_interface,
 378         .remove_interface       = eth_tech_remove_interface,
 379         .set_tethering          = eth_tech_set_tethering,
 380 };
 381
 382 static int ethernet_init(void)
 383 {
 384         int err;
 385
 386         err = connman_technology_driver_register(&eth_tech_driver);
 387         if (err < 0)
 388                 return err;
 389
 390         err = connman_network_driver_register(&eth_network_driver);
 391         if (err < 0)
 392                 return err;
 393
 394         err = connman_device_driver_register(&eth_dev_driver);
 395         if (err < 0) {
 396                 connman_network_driver_unregister(&eth_network_driver);
 397                 return err;
 398         }
 399
 400         return 0;
 401 }
 402
 403 static void ethernet_exit(void)
 404 {
 405         connman_technology_driver_unregister(&eth_tech_driver);
 406
 407         connman_network_driver_unregister(&eth_network_driver);
 408
 409         connman_device_driver_unregister(&eth_dev_driver);
 410 }
 411
 412 CONNMAN_PLUGIN_DEFINE(ethernet, "Ethernet interface plugin", VERSION,
 413                 CONNMAN_PLUGIN_PRIORITY_DEFAULT, ethernet_init, ethernet_exit)