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 <sys/types.h>
  31 #include <unistd.h>
  32 #include <stdio.h>
  33
  34 #include <linux/if_vlan.h>
  35 #include <linux/sockios.h>
  36 #include <linux/ethtool.h>
  37
  38 #ifndef IFF_LOWER_UP
  39 #define IFF_LOWER_UP    0x10000
  40 #endif
  41
  42 #include <glib.h>
  43
  44 #define CONNMAN_API_SUBJECT_TO_CHANGE
  45 #include <connman/technology.h>
  46 #include <connman/plugin.h>
  47 #include <connman/device.h>
  48 #include <connman/inet.h>
  49 #include <connman/rtnl.h>
  50 #include <connman/log.h>
  51 #include <connman/setting.h>
  52
  53 static bool eth_tethering = false;
  54
  55 struct ethernet_data {
  56         int index;
  57         unsigned flags;
  58         unsigned int watch;
  59         struct connman_network *network;
  60 };
  61
  62
  63 static int get_vlan_vid(const char *ifname)
  64 {
  65         struct vlan_ioctl_args vifr;
  66         int vid;
  67         int sk;
  68
  69         memset(&vifr, 0, sizeof(vifr));
  70
  71         sk = socket(AF_INET, SOCK_STREAM, 0);
  72         if (sk < 0)
  73                 return -errno;
  74
  75         vifr.cmd = GET_VLAN_VID_CMD;
  76         stpncpy(vifr.device1, ifname, sizeof(vifr.device1) - 1);
  77
  78         if(ioctl(sk, SIOCSIFVLAN, &vifr) >= 0)
  79                 vid = vifr.u.VID;
  80         else
  81                 vid = -errno;
  82
  83         close(sk);
  84
  85         return vid;
  86 }
  87
  88 static int get_dsa_port(const char *ifname)
  89 {
  90         int sk;
  91         int dsaport = -1;
  92         struct ifreq ifr;
  93         struct ethtool_cmd cmd;
  94         struct ethtool_drvinfo drvinfocmd;
  95         struct vlan_ioctl_args vifr;
  96
  97         sk = socket(AF_INET, SOCK_STREAM, 0);
  98         if (sk < 0)
  99                 return -errno;
 100
 101         memset(&ifr, 0, sizeof(ifr));
 102         stpncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name) - 1);
 103
 104         /* check if it is a vlan and get physical interface name*/
 105         vifr.cmd = GET_VLAN_REALDEV_NAME_CMD;
 106         stpncpy(vifr.device1, ifname, sizeof(vifr.device1) - 1);
 107
 108         if(ioctl(sk, SIOCSIFVLAN, &vifr) >= 0) {
 109                 stpncpy(ifr.ifr_name, vifr.u.device2, sizeof(ifr.ifr_name) - 1);
 110                 ifr.ifr_name[sizeof(ifr.ifr_name) - 1] = '\0';
 111         }
 112
 113         /* get driver info */
 114         drvinfocmd.cmd =  ETHTOOL_GDRVINFO;
 115         ifr.ifr_data = (caddr_t)&drvinfocmd;
 116
 117         if (!ioctl(sk, SIOCETHTOOL, &ifr)) {
 118                 if(!strcmp(drvinfocmd.driver, "dsa")) {
 119                         /* get dsa port*/
 120                         cmd.cmd =  ETHTOOL_GSET;
 121                         ifr.ifr_data = (caddr_t)&cmd;
 122
 123                         if (!ioctl(sk, SIOCETHTOOL, &ifr))
 124                                 dsaport = cmd.phy_address;
 125                 }
 126         }
 127         close(sk);
 128
 129         return dsaport;
 130 }
 131
 132 static int eth_network_probe(struct connman_network *network)
 133 {
 134         DBG("network %p", network);
 135
 136         return 0;
 137 }
 138
 139 static void eth_network_remove(struct connman_network *network)
 140 {
 141         DBG("network %p", network);
 142 }
 143
 144 static int eth_network_connect(struct connman_network *network)
 145 {
 146         DBG("network %p", network);
 147
 148         connman_network_set_connected(network, true);
 149
 150         return 0;
 151 }
 152
 153 static int eth_network_disconnect(struct connman_network *network)
 154 {
 155         DBG("network %p", network);
 156
 157         connman_network_set_connected(network, false);
 158
 159         return 0;
 160 }
 161
 162 static struct connman_network_driver eth_network_driver = {
 163         .name           = "cable",
 164         .type           = CONNMAN_NETWORK_TYPE_ETHERNET,
 165         .probe          = eth_network_probe,
 166         .remove         = eth_network_remove,
 167         .connect        = eth_network_connect,
 168         .disconnect     = eth_network_disconnect,
 169 };
 170
 171 static void add_network(struct connman_device *device,
 172                         struct ethernet_data *ethernet)
 173 {
 174         struct connman_network *network;
 175         int index;
 176         char *ifname;
 177
 178         network = connman_network_create("carrier",
 179                                         CONNMAN_NETWORK_TYPE_ETHERNET);
 180         if (!network)
 181                 return;
 182
 183         index = connman_device_get_index(device);
 184         connman_network_set_index(network, index);
 185         ifname = connman_inet_ifname(index);
 186         if (!ifname)
 187                 return;
 188
 189         connman_network_set_name(network, "Wired");
 190
 191         if (connman_device_add_network(device, network) < 0) {
 192                 connman_network_unref(network);
 193                 g_free(ifname);
 194                 return;
 195         }
 196
 197         if (!eth_tethering) {
 198                 char group[25] = "cable";
 199                 int vid, dsaport;
 200
 201                 vid = get_vlan_vid(ifname);
 202                 dsaport = get_dsa_port(ifname);
 203
 204                 /*
 205                  * Prevent service from starting the reconnect
 206                  * procedure as we do not want the DHCP client
 207                  * to run when tethering.
 208                  */
 209                 if((vid >= 0) && (dsaport >= 0))
 210                         snprintf(group, sizeof(group), "p%02x_%03x_cable", dsaport, vid);
 211                 else if (vid >= 0)
 212                         snprintf(group, sizeof(group), "%03x_cable", vid);
 213                 else if (dsaport >= 0)
 214                         snprintf(group, sizeof(group), "p%02x_cable", dsaport);
 215
 216                 connman_network_set_group(network, group);
 217         }
 218
 219         ethernet->network = network;
 220         g_free(ifname);
 221 }
 222
 223 static void remove_network(struct connman_device *device,
 224                                 struct ethernet_data *ethernet)
 225 {
 226         if (!ethernet->network)
 227                 return;
 228
 229         connman_device_remove_network(device, ethernet->network);
 230         connman_network_unref(ethernet->network);
 231
 232         ethernet->network = NULL;
 233 }
 234
 235 static void ethernet_newlink(unsigned flags, unsigned change, void *user_data)
 236 {
 237         struct connman_device *device = user_data;
 238         struct ethernet_data *ethernet = connman_device_get_data(device);
 239
 240         DBG("index %d flags %d change %d", ethernet->index, flags, change);
 241
 242         if ((ethernet->flags & IFF_UP) != (flags & IFF_UP)) {
 243                 if (flags & IFF_UP) {
 244                         DBG("power on");
 245                         connman_device_set_powered(device, true);
 246                 } else {
 247                         DBG("power off");
 248                         connman_device_set_powered(device, false);
 249                 }
 250         }
 251
 252         if ((ethernet->flags & IFF_LOWER_UP) != (flags & IFF_LOWER_UP)) {
 253                 if (flags & IFF_LOWER_UP) {
 254                         DBG("carrier on");
 255                         add_network(device, ethernet);
 256                 } else {
 257                         DBG("carrier off");
 258                         remove_network(device, ethernet);
 259                 }
 260         }
 261
 262         ethernet->flags = flags;
 263 }
 264
 265 static int eth_dev_probe(struct connman_device *device)
 266 {
 267         struct ethernet_data *ethernet;
 268
 269         DBG("device %p", device);
 270
 271         ethernet = g_try_new0(struct ethernet_data, 1);
 272         if (!ethernet)
 273                 return -ENOMEM;
 274
 275         connman_device_set_data(device, ethernet);
 276
 277         ethernet->index = connman_device_get_index(device);
 278         ethernet->flags = 0;
 279
 280         ethernet->watch = connman_rtnl_add_newlink_watch(ethernet->index,
 281                                                 ethernet_newlink, device);
 282
 283         return 0;
 284 }
 285
 286 static void eth_dev_remove(struct connman_device *device)
 287 {
 288         struct ethernet_data *ethernet = connman_device_get_data(device);
 289
 290         DBG("device %p", device);
 291
 292         connman_device_set_data(device, NULL);
 293
 294         connman_rtnl_remove_watch(ethernet->watch);
 295
 296         remove_network(device, ethernet);
 297
 298         g_free(ethernet);
 299 }
 300
 301 static int eth_dev_enable(struct connman_device *device)
 302 {
 303         struct ethernet_data *ethernet = connman_device_get_data(device);
 304
 305         DBG("device %p", device);
 306
 307         return connman_inet_ifup(ethernet->index);
 308 }
 309
 310 static int eth_dev_disable(struct connman_device *device)
 311 {
 312         struct ethernet_data *ethernet = connman_device_get_data(device);
 313
 314         DBG("device %p", device);
 315
 316         return connman_inet_ifdown(ethernet->index);
 317 }
 318
 319 static struct connman_device_driver eth_dev_driver = {
 320         .name           = "ethernet",
 321         .type           = CONNMAN_DEVICE_TYPE_ETHERNET,
 322         .probe          = eth_dev_probe,
 323         .remove         = eth_dev_remove,
 324         .enable         = eth_dev_enable,
 325         .disable        = eth_dev_disable,
 326 };
 327
 328 static int eth_tech_probe(struct connman_technology *technology)
 329 {
 330         return 0;
 331 }
 332
 333 static void eth_tech_remove(struct connman_technology *technology)
 334 {
 335         DBG("");
 336 }
 337
 338 static GList *eth_interface_list = NULL;
 339
 340 static void eth_tech_add_interface(struct connman_technology *technology,
 341                         int index, const char *name, const char *ident)
 342 {
 343         DBG("index %d name %s ident %s", index, name, ident);
 344
 345         if (g_list_find(eth_interface_list, GINT_TO_POINTER((int)index)))
 346                 return;
 347
 348         eth_interface_list = g_list_prepend(eth_interface_list,
 349                                         (GINT_TO_POINTER((int) index)));
 350 }
 351
 352 static void eth_tech_remove_interface(struct connman_technology *technology,
 353                                                                 int index)
 354 {
 355         DBG("index %d", index);
 356
 357         eth_interface_list = g_list_remove(eth_interface_list,
 358                                         GINT_TO_POINTER((int) index));
 359 }
 360
 361 static void eth_tech_enable_tethering(struct connman_technology *technology,
 362                                                 const char *bridge)
 363 {
 364         GList *list;
 365         struct ethernet_data *ethernet;
 366
 367         for (list = eth_interface_list; list; list = list->next) {
 368                 int index = GPOINTER_TO_INT(list->data);
 369                 struct connman_device *device =
 370                         connman_device_find_by_index(index);
 371
 372                 if (device) {
 373                         ethernet = connman_device_get_data(device);
 374                         if (ethernet)
 375                                 remove_network(device, ethernet);
 376                 }
 377
 378                 connman_technology_tethering_notify(technology, true);
 379
 380                 connman_inet_ifup(index);
 381
 382                 connman_inet_add_to_bridge(index, bridge);
 383
 384                 eth_tethering = true;
 385         }
 386 }
 387
 388 static void eth_tech_disable_tethering(struct connman_technology *technology,
 389                                                 const char *bridge)
 390 {
 391         GList *list;
 392
 393         for (list = eth_interface_list; list; list = list->next) {
 394                 int index = GPOINTER_TO_INT(list->data);
 395                 struct connman_device *device =
 396                         connman_device_find_by_index(index);
 397
 398                 connman_inet_remove_from_bridge(index, bridge);
 399
 400                 connman_technology_tethering_notify(technology, false);
 401
 402                 if (device)
 403                         connman_device_reconnect_service(device);
 404
 405                 eth_tethering = false;
 406         }
 407 }
 408
 409 static int eth_tech_set_tethering(struct connman_technology *technology,
 410                                 const char *identifier, const char *passphrase,
 411                                 const char *bridge, bool enabled)
 412 {
 413         if (!connman_technology_is_tethering_allowed(
 414                         CONNMAN_SERVICE_TYPE_ETHERNET))
 415                 return 0;
 416
 417         DBG("bridge %s enabled %d", bridge, enabled);
 418
 419         if (enabled)
 420                 eth_tech_enable_tethering(technology, bridge);
 421         else
 422                 eth_tech_disable_tethering(technology, bridge);
 423
 424         return 0;
 425 }
 426
 427 static struct connman_technology_driver eth_tech_driver = {
 428         .name                   = "ethernet",
 429         .type                   = CONNMAN_SERVICE_TYPE_ETHERNET,
 430         .probe                  = eth_tech_probe,
 431         .remove                 = eth_tech_remove,
 432         .add_interface          = eth_tech_add_interface,
 433         .remove_interface       = eth_tech_remove_interface,
 434         .set_tethering          = eth_tech_set_tethering,
 435 };
 436
 437 static int ethernet_init(void)
 438 {
 439         int err;
 440
 441         err = connman_technology_driver_register(&eth_tech_driver);
 442         if (err < 0)
 443                 return err;
 444
 445         err = connman_network_driver_register(&eth_network_driver);
 446         if (err < 0)
 447                 return err;
 448
 449         err = connman_device_driver_register(&eth_dev_driver);
 450         if (err < 0) {
 451                 connman_network_driver_unregister(&eth_network_driver);
 452                 return err;
 453         }
 454
 455         return 0;
 456 }
 457
 458 static void ethernet_exit(void)
 459 {
 460         connman_technology_driver_unregister(&eth_tech_driver);
 461
 462         connman_network_driver_unregister(&eth_network_driver);
 463
 464         connman_device_driver_unregister(&eth_dev_driver);
 465 }
 466
 467 CONNMAN_PLUGIN_DEFINE(ethernet, "Ethernet interface plugin", VERSION,
 468                 CONNMAN_PLUGIN_PRIORITY_DEFAULT, ethernet_init, ethernet_exit)