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