src/rtnl.c

   1 /*
   2  *
   3  *  Connection Manager
   4  *
   5  *  Copyright (C) 2007-2010  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 <stdio.h>
  28 #include <unistd.h>
  29 #include <string.h>
  30 #include <sys/socket.h>
  31 #include <sys/ioctl.h>
  32 #include <arpa/inet.h>
  33 #include <netinet/ether.h>
  34 #include <netinet/icmp6.h>
  35 #include <net/if_arp.h>
  36 #include <linux/if.h>
  37 #include <linux/netlink.h>
  38 #include <linux/rtnetlink.h>
  39 #include <linux/wireless.h>
  40
  41 #include <glib.h>
  42
  43 #include "connman.h"
  44
  45 #ifndef ARPHDR_PHONET_PIPE
  46 #define ARPHDR_PHONET_PIPE (821)
  47 #endif
  48
  49 #define print(arg...) do { if (0) connman_info(arg); } while (0)
  50 //#define print(arg...) connman_info(arg)
  51
  52 struct watch_data {
  53         unsigned int id;
  54         int index;
  55         connman_rtnl_link_cb_t newlink;
  56         void *user_data;
  57 };
  58
  59 static GSList *watch_list = NULL;
  60 static unsigned int watch_id = 0;
  61
  62 static GSList *update_list = NULL;
  63 static guint update_interval = G_MAXUINT;
  64 static guint update_timeout = 0;
  65
  66 struct interface_data {
  67         int index;
  68         char *name;
  69         char *ident;
  70         enum connman_service_type service_type;
  71         enum connman_device_type device_type;
  72 };
  73
  74 static GHashTable *interface_list = NULL;
  75
  76 static void free_interface(gpointer data)
  77 {
  78         struct interface_data *interface = data;
  79
  80         __connman_technology_remove_interface(interface->service_type,
  81                         interface->index, interface->name, interface->ident);
  82
  83         g_free(interface->ident);
  84         g_free(interface->name);
  85         g_free(interface);
  86 }
  87
  88 static connman_bool_t ether_blacklisted(const char *name)
  89 {
  90         if (name == NULL)
  91                 return TRUE;
  92
  93         /* virtual interface from VMware */
  94         if (g_str_has_prefix(name, "vmnet") == TRUE)
  95                 return TRUE;
  96
  97         /* virtual interface from VirtualBox */
  98         if (g_str_has_prefix(name, "vboxnet") == TRUE)
  99                 return TRUE;
 100
 101         /* virtual interface from Virtual Machine Manager */
 102         if (g_str_has_prefix(name, "virbr") == TRUE)
 103                 return TRUE;
 104
 105         return FALSE;
 106 }
 107
 108 static connman_bool_t wext_interface(char *ifname)
 109 {
 110         struct iwreq wrq;
 111         int fd, err;
 112
 113         fd = socket(PF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
 114         if (fd < 0)
 115                 return FALSE;
 116
 117         memset(&wrq, 0, sizeof(wrq));
 118         strncpy(wrq.ifr_name, ifname, IFNAMSIZ);
 119
 120         err = ioctl(fd, SIOCGIWNAME, &wrq);
 121
 122         close(fd);
 123
 124         if (err < 0)
 125                 return FALSE;
 126
 127         return TRUE;
 128 }
 129
 130 static void read_uevent(struct interface_data *interface)
 131 {
 132         char *filename, line[128];
 133         connman_bool_t found_devtype;
 134         FILE *f;
 135
 136         if (ether_blacklisted(interface->name) == TRUE) {
 137                 interface->service_type = CONNMAN_SERVICE_TYPE_UNKNOWN;
 138                 interface->device_type = CONNMAN_DEVICE_TYPE_UNKNOWN;
 139         } else {
 140                 interface->service_type = CONNMAN_SERVICE_TYPE_ETHERNET;
 141                 interface->device_type = CONNMAN_DEVICE_TYPE_ETHERNET;
 142         }
 143
 144         filename = g_strdup_printf("/sys/class/net/%s/uevent",
 145                                                 interface->name);
 146
 147         f = fopen(filename, "re");
 148
 149         g_free(filename);
 150
 151         if (f == NULL)
 152                 return;
 153
 154         found_devtype = FALSE;
 155         while (fgets(line, sizeof(line), f)) {
 156                 char *pos;
 157
 158                 pos = strchr(line, '\n');
 159                 if (pos == NULL)
 160                         continue;
 161                 pos[0] = '\0';
 162
 163                 if (strncmp(line, "DEVTYPE=", 8) != 0)
 164                         continue;
 165
 166                 found_devtype = TRUE;
 167
 168                 if (strcmp(line + 8, "wlan") == 0) {
 169                         interface->service_type = CONNMAN_SERVICE_TYPE_WIFI;
 170                         interface->device_type = CONNMAN_DEVICE_TYPE_WIFI;
 171                 } else if (strcmp(line + 8, "wwan") == 0) {
 172                         interface->service_type = CONNMAN_SERVICE_TYPE_CELLULAR;
 173                         interface->device_type = CONNMAN_DEVICE_TYPE_CELLULAR;
 174                 } else if (strcmp(line + 8, "bluetooth") == 0) {
 175                         interface->service_type = CONNMAN_SERVICE_TYPE_BLUETOOTH;
 176                         interface->device_type = CONNMAN_DEVICE_TYPE_BLUETOOTH;
 177                 } else if (strcmp(line + 8, "wimax") == 0) {
 178                         interface->service_type = CONNMAN_SERVICE_TYPE_WIMAX;
 179                         interface->device_type = CONNMAN_DEVICE_TYPE_WIMAX;
 180                 } else if (strcmp(line + 8, "gadget") == 0) {
 181                         interface->service_type = CONNMAN_SERVICE_TYPE_GADGET;
 182                         interface->device_type = CONNMAN_DEVICE_TYPE_GADGET;
 183
 184                 } else {
 185                         interface->service_type = CONNMAN_SERVICE_TYPE_UNKNOWN;
 186                         interface->device_type = CONNMAN_DEVICE_TYPE_UNKNOWN;
 187                 }
 188         }
 189
 190         fclose(f);
 191
 192         if (found_devtype)
 193                 return;
 194
 195         /* We haven't got a DEVTYPE, let's check if it's a wireless device */
 196         if (wext_interface(interface->name)) {
 197                 interface->service_type = CONNMAN_SERVICE_TYPE_WIFI;
 198                 interface->device_type = CONNMAN_DEVICE_TYPE_WIFI;
 199
 200                 connman_error("%s runs an unsupported 802.11 driver",
 201                                 interface->name);
 202         }
 203 }
 204
 205 enum connman_device_type __connman_rtnl_get_device_type(int index)
 206 {
 207         struct interface_data *interface;
 208
 209         interface = g_hash_table_lookup(interface_list,
 210                                         GINT_TO_POINTER(index));
 211         if (interface == NULL)
 212                 return CONNMAN_DEVICE_TYPE_UNKNOWN;
 213
 214         return interface->device_type;
 215 }
 216
 217 /**
 218  * connman_rtnl_add_newlink_watch:
 219  * @index: network device index
 220  * @callback: callback function
 221  * @user_data: callback data;
 222  *
 223  * Add a new RTNL watch for newlink events
 224  *
 225  * Returns: %0 on failure and a unique id on success
 226  */
 227 unsigned int connman_rtnl_add_newlink_watch(int index,
 228                         connman_rtnl_link_cb_t callback, void *user_data)
 229 {
 230         struct watch_data *watch;
 231
 232         watch = g_try_new0(struct watch_data, 1);
 233         if (watch == NULL)
 234                 return 0;
 235
 236         watch->id = ++watch_id;
 237         watch->index = index;
 238
 239         watch->newlink = callback;
 240         watch->user_data = user_data;
 241
 242         watch_list = g_slist_prepend(watch_list, watch);
 243
 244         DBG("id %d", watch->id);
 245
 246         if (callback) {
 247                 unsigned int flags = __connman_ipconfig_get_flags_from_index(index);
 248
 249                 if (flags > 0)
 250                         callback(flags, 0, user_data);
 251         }
 252
 253         return watch->id;
 254 }
 255
 256 /**
 257  * connman_rtnl_remove_watch:
 258  * @id: watch identifier
 259  *
 260  * Remove the RTNL watch for the identifier
 261  */
 262 void connman_rtnl_remove_watch(unsigned int id)
 263 {
 264         GSList *list;
 265
 266         DBG("id %d", id);
 267
 268         if (id == 0)
 269                 return;
 270
 271         for (list = watch_list; list; list = list->next) {
 272                 struct watch_data *watch = list->data;
 273
 274                 if (watch->id  == id) {
 275                         watch_list = g_slist_remove(watch_list, watch);
 276                         g_free(watch);
 277                         break;
 278                 }
 279         }
 280 }
 281
 282 static void trigger_rtnl(int index, void *user_data)
 283 {
 284         struct connman_rtnl *rtnl = user_data;
 285
 286         if (rtnl->newlink) {
 287                 unsigned short type = __connman_ipconfig_get_type_from_index(index);
 288                 unsigned int flags = __connman_ipconfig_get_flags_from_index(index);
 289
 290                 rtnl->newlink(type, index, flags, 0);
 291         }
 292
 293         if (rtnl->newgateway) {
 294                 const char *gateway = __connman_ipconfig_get_gateway_from_index(index);
 295
 296                 if (gateway != NULL)
 297                         rtnl->newgateway(index, gateway);
 298         }
 299 }
 300
 301 static GSList *rtnl_list = NULL;
 302
 303 static gint compare_priority(gconstpointer a, gconstpointer b)
 304 {
 305         const struct connman_rtnl *rtnl1 = a;
 306         const struct connman_rtnl *rtnl2 = b;
 307
 308         return rtnl2->priority - rtnl1->priority;
 309 }
 310
 311 /**
 312  * connman_rtnl_register:
 313  * @rtnl: RTNL module
 314  *
 315  * Register a new RTNL module
 316  *
 317  * Returns: %0 on success
 318  */
 319 int connman_rtnl_register(struct connman_rtnl *rtnl)
 320 {
 321         DBG("rtnl %p name %s", rtnl, rtnl->name);
 322
 323         rtnl_list = g_slist_insert_sorted(rtnl_list, rtnl,
 324                                                         compare_priority);
 325
 326         __connman_ipconfig_foreach(trigger_rtnl, rtnl);
 327
 328         return 0;
 329 }
 330
 331 /**
 332  * connman_rtnl_unregister:
 333  * @rtnl: RTNL module
 334  *
 335  * Remove a previously registered RTNL module
 336  */
 337 void connman_rtnl_unregister(struct connman_rtnl *rtnl)
 338 {
 339         DBG("rtnl %p name %s", rtnl, rtnl->name);
 340
 341         rtnl_list = g_slist_remove(rtnl_list, rtnl);
 342 }
 343
 344 static const char *operstate2str(unsigned char operstate)
 345 {
 346         switch (operstate) {
 347         case IF_OPER_UNKNOWN:
 348                 return "UNKNOWN";
 349         case IF_OPER_NOTPRESENT:
 350                 return "NOT-PRESENT";
 351         case IF_OPER_DOWN:
 352                 return "DOWN";
 353         case IF_OPER_LOWERLAYERDOWN:
 354                 return "LOWER-LAYER-DOWN";
 355         case IF_OPER_TESTING:
 356                 return "TESTING";
 357         case IF_OPER_DORMANT:
 358                 return "DORMANT";
 359         case IF_OPER_UP:
 360                 return "UP";
 361         }
 362
 363         return "";
 364 }
 365
 366 static void extract_link(struct ifinfomsg *msg, int bytes,
 367                                 struct ether_addr *address, const char **ifname,
 368                                 unsigned int *mtu, unsigned char *operstate,
 369                                                 struct rtnl_link_stats *stats)
 370 {
 371         struct rtattr *attr;
 372
 373         for (attr = IFLA_RTA(msg); RTA_OK(attr, bytes);
 374                                         attr = RTA_NEXT(attr, bytes)) {
 375                 switch (attr->rta_type) {
 376                 case IFLA_ADDRESS:
 377                         if (address != NULL)
 378                                 memcpy(address, RTA_DATA(attr), ETH_ALEN);
 379                         break;
 380                 case IFLA_IFNAME:
 381                         if (ifname != NULL)
 382                                 *ifname = RTA_DATA(attr);
 383                         break;
 384                 case IFLA_MTU:
 385                         if (mtu != NULL)
 386                                 *mtu = *((unsigned int *) RTA_DATA(attr));
 387                         break;
 388                 case IFLA_STATS:
 389                         if (stats != NULL)
 390                                 memcpy(stats, RTA_DATA(attr),
 391                                         sizeof(struct rtnl_link_stats));
 392                         break;
 393                 case IFLA_OPERSTATE:
 394                         if (operstate != NULL)
 395                                 *operstate = *((unsigned char *) RTA_DATA(attr));
 396                         break;
 397                 case IFLA_LINKMODE:
 398                         break;
 399                 }
 400         }
 401 }
 402
 403 static void process_newlink(unsigned short type, int index, unsigned flags,
 404                         unsigned change, struct ifinfomsg *msg, int bytes)
 405 {
 406         struct ether_addr address = {{ 0, 0, 0, 0, 0, 0 }};
 407         struct ether_addr compare = {{ 0, 0, 0, 0, 0, 0 }};
 408         struct rtnl_link_stats stats;
 409         unsigned char operstate = 0xff;
 410         struct interface_data *interface;
 411         const char *ifname = NULL;
 412         unsigned int mtu = 0;
 413         char ident[13], str[18];
 414         GSList *list;
 415
 416         memset(&stats, 0, sizeof(stats));
 417         extract_link(msg, bytes, &address, &ifname, &mtu, &operstate, &stats);
 418
 419         snprintf(ident, 13, "%02x%02x%02x%02x%02x%02x",
 420                                                 address.ether_addr_octet[0],
 421                                                 address.ether_addr_octet[1],
 422                                                 address.ether_addr_octet[2],
 423                                                 address.ether_addr_octet[3],
 424                                                 address.ether_addr_octet[4],
 425                                                 address.ether_addr_octet[5]);
 426
 427         snprintf(str, 18, "%02X:%02X:%02X:%02X:%02X:%02X",
 428                                                 address.ether_addr_octet[0],
 429                                                 address.ether_addr_octet[1],
 430                                                 address.ether_addr_octet[2],
 431                                                 address.ether_addr_octet[3],
 432                                                 address.ether_addr_octet[4],
 433                                                 address.ether_addr_octet[5]);
 434
 435         switch (type) {
 436         case ARPHRD_ETHER:
 437         case ARPHRD_LOOPBACK:
 438         case ARPHDR_PHONET_PIPE:
 439         case ARPHRD_NONE:
 440                 __connman_ipconfig_newlink(index, type, flags,
 441                                                         str, mtu, &stats);
 442                 break;
 443         }
 444
 445         if (memcmp(&address, &compare, ETH_ALEN) != 0)
 446                 connman_info("%s {newlink} index %d address %s mtu %u",
 447                                                 ifname, index, str, mtu);
 448
 449         if (operstate != 0xff)
 450                 connman_info("%s {newlink} index %d operstate %u <%s>",
 451                                                 ifname, index, operstate,
 452                                                 operstate2str(operstate));
 453
 454         interface = g_hash_table_lookup(interface_list, GINT_TO_POINTER(index));
 455         if (interface == NULL) {
 456                 interface = g_new0(struct interface_data, 1);
 457                 interface->index = index;
 458                 interface->name = g_strdup(ifname);
 459                 interface->ident = g_strdup(ident);
 460
 461                 g_hash_table_insert(interface_list,
 462                                         GINT_TO_POINTER(index), interface);
 463
 464                 if (type == ARPHRD_ETHER)
 465                         read_uevent(interface);
 466
 467                 __connman_technology_add_interface(interface->service_type,
 468                         interface->index, interface->name, interface->ident);
 469         }
 470
 471         for (list = rtnl_list; list; list = list->next) {
 472                 struct connman_rtnl *rtnl = list->data;
 473
 474                 if (rtnl->newlink)
 475                         rtnl->newlink(type, index, flags, change);
 476         }
 477
 478         for (list = watch_list; list; list = list->next) {
 479                 struct watch_data *watch = list->data;
 480
 481                 if (watch->index != index)
 482                         continue;
 483
 484                 if (watch->newlink)
 485                         watch->newlink(flags, change, watch->user_data);
 486         }
 487 }
 488
 489 static void process_dellink(unsigned short type, int index, unsigned flags,
 490                         unsigned change, struct ifinfomsg *msg, int bytes)
 491 {
 492         struct rtnl_link_stats stats;
 493         unsigned char operstate = 0xff;
 494         const char *ifname = NULL;
 495         GSList *list;
 496
 497         memset(&stats, 0, sizeof(stats));
 498         extract_link(msg, bytes, NULL, &ifname, NULL, &operstate, &stats);
 499
 500         if (operstate != 0xff)
 501                 connman_info("%s {dellink} index %d operstate %u <%s>",
 502                                                 ifname, index, operstate,
 503                                                 operstate2str(operstate));
 504
 505         for (list = rtnl_list; list; list = list->next) {
 506                 struct connman_rtnl *rtnl = list->data;
 507
 508                 if (rtnl->dellink)
 509                         rtnl->dellink(type, index, flags, change);
 510         }
 511
 512         switch (type) {
 513         case ARPHRD_ETHER:
 514         case ARPHRD_LOOPBACK:
 515         case ARPHRD_NONE:
 516                 __connman_ipconfig_dellink(index, &stats);
 517                 break;
 518         }
 519
 520         g_hash_table_remove(interface_list, GINT_TO_POINTER(index));
 521 }
 522
 523 static void extract_ipv4_addr(struct ifaddrmsg *msg, int bytes,
 524                                                 const char **label,
 525                                                 struct in_addr *local,
 526                                                 struct in_addr *address,
 527                                                 struct in_addr *broadcast)
 528 {
 529         struct rtattr *attr;
 530
 531         for (attr = IFA_RTA(msg); RTA_OK(attr, bytes);
 532                                         attr = RTA_NEXT(attr, bytes)) {
 533                 switch (attr->rta_type) {
 534                 case IFA_ADDRESS:
 535                         if (address != NULL)
 536                                 *address = *((struct in_addr *) RTA_DATA(attr));
 537                         break;
 538                 case IFA_LOCAL:
 539                         if (local != NULL)
 540                                 *local = *((struct in_addr *) RTA_DATA(attr));
 541                         break;
 542                 case IFA_BROADCAST:
 543                         if (broadcast != NULL)
 544                                 *broadcast = *((struct in_addr *) RTA_DATA(attr));
 545                         break;
 546                 case IFA_LABEL:
 547                         if (label != NULL)
 548                                 *label = RTA_DATA(attr);
 549                         break;
 550                 }
 551         }
 552 }
 553
 554 static void extract_ipv6_addr(struct ifaddrmsg *msg, int bytes,
 555                                                 struct in6_addr *addr,
 556                                                 struct in6_addr *local)
 557 {
 558         struct rtattr *attr;
 559
 560         for (attr = IFA_RTA(msg); RTA_OK(attr, bytes);
 561                                         attr = RTA_NEXT(attr, bytes)) {
 562                 switch (attr->rta_type) {
 563                 case IFA_ADDRESS:
 564                         if (addr != NULL)
 565                                 *addr = *((struct in6_addr *) RTA_DATA(attr));
 566                         break;
 567                 case IFA_LOCAL:
 568                         if (local != NULL)
 569                                 *local = *((struct in6_addr *) RTA_DATA(attr));
 570                         break;
 571                 }
 572         }
 573 }
 574
 575 static void process_newaddr(unsigned char family, unsigned char prefixlen,
 576                                 int index, struct ifaddrmsg *msg, int bytes)
 577 {
 578         const char *label = NULL;
 579         void *src;
 580         char ip_string[INET6_ADDRSTRLEN];
 581
 582         if (family == AF_INET) {
 583                 struct in_addr ipv4_addr = { INADDR_ANY };
 584
 585                 extract_ipv4_addr(msg, bytes, &label, &ipv4_addr, NULL, NULL);
 586                 src = &ipv4_addr;
 587         } else if (family == AF_INET6) {
 588                 struct in6_addr ipv6_address, ipv6_local;
 589
 590                 extract_ipv6_addr(msg, bytes, &ipv6_address, &ipv6_local);
 591                 if (IN6_IS_ADDR_LINKLOCAL(&ipv6_address))
 592                         return;
 593
 594                 src = &ipv6_address;
 595         } else {
 596                 return;
 597         }
 598
 599         if (inet_ntop(family, src, ip_string, INET6_ADDRSTRLEN) == NULL)
 600                 return;
 601
 602         __connman_ipconfig_newaddr(index, family, label,
 603                                         prefixlen, ip_string);
 604 }
 605
 606 static void process_deladdr(unsigned char family, unsigned char prefixlen,
 607                                 int index, struct ifaddrmsg *msg, int bytes)
 608 {
 609         const char *label = NULL;
 610         void *src;
 611         char ip_string[INET6_ADDRSTRLEN];
 612
 613         if (family == AF_INET) {
 614                 struct in_addr ipv4_addr = { INADDR_ANY };
 615
 616                 extract_ipv4_addr(msg, bytes, &label, &ipv4_addr, NULL, NULL);
 617                 src = &ipv4_addr;
 618         } else if (family == AF_INET6) {
 619                 struct in6_addr ipv6_address, ipv6_local;
 620
 621                 extract_ipv6_addr(msg, bytes, &ipv6_address, &ipv6_local);
 622                 if (IN6_IS_ADDR_LINKLOCAL(&ipv6_address))
 623                         return;
 624
 625                 src = &ipv6_address;
 626         } else {
 627                 return;
 628         }
 629
 630         if (inet_ntop(family, src, ip_string, INET6_ADDRSTRLEN) == NULL)
 631                 return;
 632
 633         __connman_ipconfig_deladdr(index, family, label,
 634                                         prefixlen, ip_string);
 635 }
 636
 637 static void extract_ipv4_route(struct rtmsg *msg, int bytes, int *index,
 638                                                 struct in_addr *dst,
 639                                                 struct in_addr *gateway)
 640 {
 641         struct rtattr *attr;
 642
 643         for (attr = RTM_RTA(msg); RTA_OK(attr, bytes);
 644                                         attr = RTA_NEXT(attr, bytes)) {
 645                 switch (attr->rta_type) {
 646                 case RTA_DST:
 647                         if (dst != NULL)
 648                                 *dst = *((struct in_addr *) RTA_DATA(attr));
 649                         break;
 650                 case RTA_GATEWAY:
 651                         if (gateway != NULL)
 652                                 *gateway = *((struct in_addr *) RTA_DATA(attr));
 653                         break;
 654                 case RTA_OIF:
 655                         if (index != NULL)
 656                                 *index = *((int *) RTA_DATA(attr));
 657                         break;
 658                 }
 659         }
 660 }
 661
 662 static void extract_ipv6_route(struct rtmsg *msg, int bytes, int *index,
 663                                                 struct in6_addr *dst,
 664                                                 struct in6_addr *gateway)
 665 {
 666         struct rtattr *attr;
 667
 668         for (attr = RTM_RTA(msg); RTA_OK(attr, bytes);
 669                                         attr = RTA_NEXT(attr, bytes)) {
 670                 switch (attr->rta_type) {
 671                 case RTA_DST:
 672                         if (dst != NULL)
 673                                 *dst = *((struct in6_addr *) RTA_DATA(attr));
 674                         break;
 675                 case RTA_GATEWAY:
 676                         if (gateway != NULL)
 677                                 *gateway =
 678                                         *((struct in6_addr *) RTA_DATA(attr));
 679                         break;
 680                 case RTA_OIF:
 681                         if (index != NULL)
 682                                 *index = *((int *) RTA_DATA(attr));
 683                         break;
 684                 }
 685         }
 686 }
 687
 688 static void process_newroute(unsigned char family, unsigned char scope,
 689                                                 struct rtmsg *msg, int bytes)
 690 {
 691         GSList *list;
 692         char dststr[INET6_ADDRSTRLEN], gatewaystr[INET6_ADDRSTRLEN];
 693         int index = -1;
 694
 695         if (family == AF_INET) {
 696                 struct in_addr dst = { INADDR_ANY }, gateway = { INADDR_ANY };
 697
 698                 extract_ipv4_route(msg, bytes, &index, &dst, &gateway);
 699
 700                 inet_ntop(family, &dst, dststr, sizeof(dststr));
 701                 inet_ntop(family, &gateway, gatewaystr, sizeof(gatewaystr));
 702
 703                 __connman_ipconfig_newroute(index, family, scope, dststr,
 704                                                                 gatewaystr);
 705
 706                 /* skip host specific routes */
 707                 if (scope != RT_SCOPE_UNIVERSE &&
 708                         !(scope == RT_SCOPE_LINK && dst.s_addr == INADDR_ANY))
 709                         return;
 710
 711                 if (dst.s_addr != INADDR_ANY)
 712                         return;
 713
 714         } else if (family == AF_INET6) {
 715                 struct in6_addr dst = IN6ADDR_ANY_INIT,
 716                                 gateway = IN6ADDR_ANY_INIT;
 717
 718                 extract_ipv6_route(msg, bytes, &index, &dst, &gateway);
 719
 720                 inet_ntop(family, &dst, dststr, sizeof(dststr));
 721                 inet_ntop(family, &gateway, gatewaystr, sizeof(gatewaystr));
 722
 723                 __connman_ipconfig_newroute(index, family, scope, dststr,
 724                                                                 gatewaystr);
 725
 726                 /* skip host specific routes */
 727                 if (scope != RT_SCOPE_UNIVERSE &&
 728                         !(scope == RT_SCOPE_LINK &&
 729                                 IN6_IS_ADDR_UNSPECIFIED(&dst)))
 730                         return;
 731
 732                 if (!IN6_IS_ADDR_UNSPECIFIED(&dst))
 733                         return;
 734         } else
 735                 return;
 736
 737         for (list = rtnl_list; list; list = list->next) {
 738                 struct connman_rtnl *rtnl = list->data;
 739
 740                 if (rtnl->newgateway)
 741                         rtnl->newgateway(index, gatewaystr);
 742         }
 743 }
 744
 745 static void process_delroute(unsigned char family, unsigned char scope,
 746                                                 struct rtmsg *msg, int bytes)
 747 {
 748         GSList *list;
 749         char dststr[INET6_ADDRSTRLEN], gatewaystr[INET6_ADDRSTRLEN];
 750         int index = -1;
 751
 752         if (family == AF_INET) {
 753                 struct in_addr dst = { INADDR_ANY }, gateway = { INADDR_ANY };
 754
 755                 extract_ipv4_route(msg, bytes, &index, &dst, &gateway);
 756
 757                 inet_ntop(family, &dst, dststr, sizeof(dststr));
 758                 inet_ntop(family, &gateway, gatewaystr, sizeof(gatewaystr));
 759
 760                 __connman_ipconfig_delroute(index, family, scope, dststr,
 761                                                                 gatewaystr);
 762
 763                 /* skip host specific routes */
 764                 if (scope != RT_SCOPE_UNIVERSE &&
 765                         !(scope == RT_SCOPE_LINK && dst.s_addr == INADDR_ANY))
 766                         return;
 767
 768                 if (dst.s_addr != INADDR_ANY)
 769                         return;
 770
 771         }  else if (family == AF_INET6) {
 772                 struct in6_addr dst = IN6ADDR_ANY_INIT,
 773                                 gateway = IN6ADDR_ANY_INIT;
 774
 775                 extract_ipv6_route(msg, bytes, &index, &dst, &gateway);
 776
 777                 inet_ntop(family, &dst, dststr, sizeof(dststr));
 778                 inet_ntop(family, &gateway, gatewaystr, sizeof(gatewaystr));
 779
 780                 __connman_ipconfig_delroute(index, family, scope, dststr,
 781                                                 gatewaystr);
 782
 783                 /* skip host specific routes */
 784                 if (scope != RT_SCOPE_UNIVERSE &&
 785                         !(scope == RT_SCOPE_LINK &&
 786                                 IN6_IS_ADDR_UNSPECIFIED(&dst)))
 787                         return;
 788
 789                 if (!IN6_IS_ADDR_UNSPECIFIED(&dst))
 790                         return;
 791         } else
 792                 return;
 793
 794         for (list = rtnl_list; list; list = list->next) {
 795                 struct connman_rtnl *rtnl = list->data;
 796
 797                 if (rtnl->delgateway)
 798                         rtnl->delgateway(index, gatewaystr);
 799         }
 800 }
 801
 802 static inline void print_ether(struct rtattr *attr, const char *name)
 803 {
 804         int len = (int) RTA_PAYLOAD(attr);
 805
 806         if (len == ETH_ALEN) {
 807                 struct ether_addr eth;
 808                 memcpy(&eth, RTA_DATA(attr), ETH_ALEN);
 809                 print("  attr %s (len %d) %s\n", name, len, ether_ntoa(&eth));
 810         } else
 811                 print("  attr %s (len %d)\n", name, len);
 812 }
 813
 814 static inline void print_inet(struct rtattr *attr, const char *name,
 815                                                         unsigned char family)
 816 {
 817         int len = (int) RTA_PAYLOAD(attr);
 818
 819         if (family == AF_INET && len == sizeof(struct in_addr)) {
 820                 struct in_addr addr;
 821                 addr = *((struct in_addr *) RTA_DATA(attr));
 822                 print("  attr %s (len %d) %s\n", name, len, inet_ntoa(addr));
 823         } else
 824                 print("  attr %s (len %d)\n", name, len);
 825 }
 826
 827 static inline void print_string(struct rtattr *attr, const char *name)
 828 {
 829         print("  attr %s (len %d) %s\n", name, (int) RTA_PAYLOAD(attr),
 830                                                 (char *) RTA_DATA(attr));
 831 }
 832
 833 static inline void print_byte(struct rtattr *attr, const char *name)
 834 {
 835         print("  attr %s (len %d) 0x%02x\n", name, (int) RTA_PAYLOAD(attr),
 836                                         *((unsigned char *) RTA_DATA(attr)));
 837 }
 838
 839 static inline void print_integer(struct rtattr *attr, const char *name)
 840 {
 841         print("  attr %s (len %d) %d\n", name, (int) RTA_PAYLOAD(attr),
 842                                                 *((int *) RTA_DATA(attr)));
 843 }
 844
 845 static inline void print_attr(struct rtattr *attr, const char *name)
 846 {
 847         int len = (int) RTA_PAYLOAD(attr);
 848
 849         if (name && len > 0)
 850                 print("  attr %s (len %d)\n", name, len);
 851         else
 852                 print("  attr %d (len %d)\n", attr->rta_type, len);
 853 }
 854
 855 static void rtnl_link(struct nlmsghdr *hdr)
 856 {
 857         struct ifinfomsg *msg;
 858         struct rtattr *attr;
 859         int bytes;
 860
 861         msg = (struct ifinfomsg *) NLMSG_DATA(hdr);
 862         bytes = IFLA_PAYLOAD(hdr);
 863
 864         print("ifi_index %d ifi_flags 0x%04x", msg->ifi_index, msg->ifi_flags);
 865
 866         for (attr = IFLA_RTA(msg); RTA_OK(attr, bytes);
 867                                         attr = RTA_NEXT(attr, bytes)) {
 868                 switch (attr->rta_type) {
 869                 case IFLA_ADDRESS:
 870                         print_ether(attr, "address");
 871                         break;
 872                 case IFLA_BROADCAST:
 873                         print_ether(attr, "broadcast");
 874                         break;
 875                 case IFLA_IFNAME:
 876                         print_string(attr, "ifname");
 877                         break;
 878                 case IFLA_MTU:
 879                         print_integer(attr, "mtu");
 880                         break;
 881                 case IFLA_LINK:
 882                         print_attr(attr, "link");
 883                         break;
 884                 case IFLA_QDISC:
 885                         print_attr(attr, "qdisc");
 886                         break;
 887                 case IFLA_STATS:
 888                         print_attr(attr, "stats");
 889                         break;
 890                 case IFLA_COST:
 891                         print_attr(attr, "cost");
 892                         break;
 893                 case IFLA_PRIORITY:
 894                         print_attr(attr, "priority");
 895                         break;
 896                 case IFLA_MASTER:
 897                         print_attr(attr, "master");
 898                         break;
 899                 case IFLA_WIRELESS:
 900                         print_attr(attr, "wireless");
 901                         break;
 902                 case IFLA_PROTINFO:
 903                         print_attr(attr, "protinfo");
 904                         break;
 905                 case IFLA_TXQLEN:
 906                         print_integer(attr, "txqlen");
 907                         break;
 908                 case IFLA_MAP:
 909                         print_attr(attr, "map");
 910                         break;
 911                 case IFLA_WEIGHT:
 912                         print_attr(attr, "weight");
 913                         break;
 914                 case IFLA_OPERSTATE:
 915                         print_byte(attr, "operstate");
 916                         break;
 917                 case IFLA_LINKMODE:
 918                         print_byte(attr, "linkmode");
 919                         break;
 920                 default:
 921                         print_attr(attr, NULL);
 922                         break;
 923                 }
 924         }
 925 }
 926
 927 static void rtnl_newlink(struct nlmsghdr *hdr)
 928 {
 929         struct ifinfomsg *msg = (struct ifinfomsg *) NLMSG_DATA(hdr);
 930
 931         rtnl_link(hdr);
 932
 933         process_newlink(msg->ifi_type, msg->ifi_index, msg->ifi_flags,
 934                                 msg->ifi_change, msg, IFA_PAYLOAD(hdr));
 935 }
 936
 937 static void rtnl_dellink(struct nlmsghdr *hdr)
 938 {
 939         struct ifinfomsg *msg = (struct ifinfomsg *) NLMSG_DATA(hdr);
 940
 941         rtnl_link(hdr);
 942
 943         process_dellink(msg->ifi_type, msg->ifi_index, msg->ifi_flags,
 944                                 msg->ifi_change, msg, IFA_PAYLOAD(hdr));
 945 }
 946
 947 static void rtnl_addr(struct nlmsghdr *hdr)
 948 {
 949         struct ifaddrmsg *msg;
 950         struct rtattr *attr;
 951         int bytes;
 952
 953         msg = (struct ifaddrmsg *) NLMSG_DATA(hdr);
 954         bytes = IFA_PAYLOAD(hdr);
 955
 956         print("ifa_family %d ifa_index %d", msg->ifa_family, msg->ifa_index);
 957
 958         for (attr = IFA_RTA(msg); RTA_OK(attr, bytes);
 959                                         attr = RTA_NEXT(attr, bytes)) {
 960                 switch (attr->rta_type) {
 961                 case IFA_ADDRESS:
 962                         print_inet(attr, "address", msg->ifa_family);
 963                         break;
 964                 case IFA_LOCAL:
 965                         print_inet(attr, "local", msg->ifa_family);
 966                         break;
 967                 case IFA_LABEL:
 968                         print_string(attr, "label");
 969                         break;
 970                 case IFA_BROADCAST:
 971                         print_inet(attr, "broadcast", msg->ifa_family);
 972                         break;
 973                 case IFA_ANYCAST:
 974                         print_attr(attr, "anycast");
 975                         break;
 976                 case IFA_CACHEINFO:
 977                         print_attr(attr, "cacheinfo");
 978                         break;
 979                 case IFA_MULTICAST:
 980                         print_attr(attr, "multicast");
 981                         break;
 982                 default:
 983                         print_attr(attr, NULL);
 984                         break;
 985                 }
 986         }
 987 }
 988
 989 static void rtnl_newaddr(struct nlmsghdr *hdr)
 990 {
 991         struct ifaddrmsg *msg = (struct ifaddrmsg *) NLMSG_DATA(hdr);
 992
 993         rtnl_addr(hdr);
 994
 995         process_newaddr(msg->ifa_family, msg->ifa_prefixlen, msg->ifa_index,
 996                                                 msg, IFA_PAYLOAD(hdr));
 997 }
 998
 999 static void rtnl_deladdr(struct nlmsghdr *hdr)
1000 {
1001         struct ifaddrmsg *msg = (struct ifaddrmsg *) NLMSG_DATA(hdr);
1002
1003         rtnl_addr(hdr);
1004
1005         process_deladdr(msg->ifa_family, msg->ifa_prefixlen, msg->ifa_index,
1006                                                 msg, IFA_PAYLOAD(hdr));
1007 }
1008
1009 static void rtnl_route(struct nlmsghdr *hdr)
1010 {
1011         struct rtmsg *msg;
1012         struct rtattr *attr;
1013         int bytes;
1014
1015         msg = (struct rtmsg *) NLMSG_DATA(hdr);
1016         bytes = RTM_PAYLOAD(hdr);
1017
1018         print("rtm_family %d rtm_table %d rtm_protocol %d",
1019                         msg->rtm_family, msg->rtm_table, msg->rtm_protocol);
1020         print("rtm_scope %d rtm_type %d rtm_flags 0x%04x",
1021                                 msg->rtm_scope, msg->rtm_type, msg->rtm_flags);
1022
1023         for (attr = RTM_RTA(msg); RTA_OK(attr, bytes);
1024                                         attr = RTA_NEXT(attr, bytes)) {
1025                 switch (attr->rta_type) {
1026                 case RTA_DST:
1027                         print_inet(attr, "dst", msg->rtm_family);
1028                         break;
1029                 case RTA_SRC:
1030                         print_inet(attr, "src", msg->rtm_family);
1031                         break;
1032                 case RTA_IIF:
1033                         print_string(attr, "iif");
1034                         break;
1035                 case RTA_OIF:
1036                         print_integer(attr, "oif");
1037                         break;
1038                 case RTA_GATEWAY:
1039                         print_inet(attr, "gateway", msg->rtm_family);
1040                         break;
1041                 case RTA_PRIORITY:
1042                         print_attr(attr, "priority");
1043                         break;
1044                 case RTA_PREFSRC:
1045                         print_inet(attr, "prefsrc", msg->rtm_family);
1046                         break;
1047                 case RTA_METRICS:
1048                         print_attr(attr, "metrics");
1049                         break;
1050                 case RTA_TABLE:
1051                         print_integer(attr, "table");
1052                         break;
1053                 default:
1054                         print_attr(attr, NULL);
1055                         break;
1056                 }
1057         }
1058 }
1059
1060 static connman_bool_t is_route_rtmsg(struct rtmsg *msg)
1061 {
1062
1063         if (msg->rtm_table != RT_TABLE_MAIN)
1064                 return FALSE;
1065
1066         if (msg->rtm_protocol != RTPROT_BOOT &&
1067                         msg->rtm_protocol != RTPROT_KERNEL)
1068                 return FALSE;
1069
1070         if (msg->rtm_type != RTN_UNICAST)
1071                 return FALSE;
1072
1073         return TRUE;
1074 }
1075
1076 static void rtnl_newroute(struct nlmsghdr *hdr)
1077 {
1078         struct rtmsg *msg = (struct rtmsg *) NLMSG_DATA(hdr);
1079
1080         rtnl_route(hdr);
1081
1082         if (is_route_rtmsg(msg))
1083                 process_newroute(msg->rtm_family, msg->rtm_scope,
1084                                                 msg, RTM_PAYLOAD(hdr));
1085 }
1086
1087 static void rtnl_delroute(struct nlmsghdr *hdr)
1088 {
1089         struct rtmsg *msg = (struct rtmsg *) NLMSG_DATA(hdr);
1090
1091         rtnl_route(hdr);
1092
1093         if (is_route_rtmsg(msg))
1094                 process_delroute(msg->rtm_family, msg->rtm_scope,
1095                                                 msg, RTM_PAYLOAD(hdr));
1096 }
1097
1098 static void *rtnl_nd_opt_rdnss(struct nd_opt_hdr *opt, guint32 *lifetime,
1099                                int *nr_servers)
1100 {
1101         guint32 *optint = (void *)opt;
1102
1103         if (opt->nd_opt_len < 3)
1104                 return NULL;
1105
1106         if (*lifetime > ntohl(optint[1]))
1107                 *lifetime = ntohl(optint[1]);
1108
1109         /* nd_opt_len is in units of 8 bytes. The header is 1 unit (8 bytes)
1110            and each address is another 2 units (16 bytes).
1111            So the number of addresses (given rounding) is nd_opt_len/2 */
1112         *nr_servers = opt->nd_opt_len / 2;
1113
1114         /* And they start 8 bytes into the packet, or two guint32s in. */
1115         return optint + 2;
1116 }
1117
1118 static const char **rtnl_nd_opt_dnssl(struct nd_opt_hdr *opt, guint32 *lifetime)
1119 {
1120         const char **domains = NULL;
1121         guint32 *optint = (void *)opt;
1122         unsigned char *optc = (void *)&optint[2];
1123         int data_len = (opt->nd_opt_len * 8) - 8;
1124         int nr_domains = 0;
1125         int i, tmp;
1126
1127         if (*lifetime > ntohl(optint[1]))
1128                 *lifetime = ntohl(optint[1]);
1129
1130         /* Turn it into normal strings by converting the length bytes into '.',
1131            and count how many search domains there are while we're at it. */
1132         i = 0;
1133         while (i < data_len) {
1134                 if (optc[i] > 0x3f) {
1135                         DBG("DNSSL contains compressed elements in violation of RFC6106");
1136                         return NULL;
1137                 }
1138
1139                 if (optc[i] == 0) {
1140                         nr_domains++;
1141                         i++;
1142                         /* Check for double zero */
1143                         if (i < data_len && optc[i] == 0)
1144                                 break;
1145                         continue;
1146                 }
1147
1148                 tmp = i;
1149                 i += optc[i] + 1;
1150
1151                 if (i >= data_len) {
1152                         DBG("DNSSL data overflows option length");
1153                         return NULL;
1154                 }
1155
1156                 optc[tmp] = '.';
1157         }
1158
1159         domains = g_try_new0(const char *, nr_domains + 1);
1160         if (!domains)
1161                 return NULL;
1162
1163         /* Now point to the normal strings, missing out the leading '.' that
1164            each of them will have now. */
1165         for (i = 0; i < nr_domains; i++) {
1166                 domains[i] = (char *)optc + 1;
1167                 optc += strlen((char *)optc) + 1;
1168         }
1169
1170         return domains;
1171 }
1172
1173 static void rtnl_newnduseropt(struct nlmsghdr *hdr)
1174 {
1175         struct nduseroptmsg *msg = (struct nduseroptmsg *) NLMSG_DATA(hdr);
1176         struct nd_opt_hdr *opt = (void *)&msg[1];
1177         guint32 lifetime = -1;
1178         const char **domains = NULL;
1179         struct in6_addr *servers = NULL;
1180         int nr_servers = 0;
1181         int msglen = msg->nduseropt_opts_len;
1182         char *interface;
1183
1184         DBG("family %02x index %x len %04x type %02x code %02x",
1185             msg->nduseropt_family, msg->nduseropt_ifindex,
1186             msg->nduseropt_opts_len, msg->nduseropt_icmp_type,
1187             msg->nduseropt_icmp_code);
1188
1189         if (msg->nduseropt_family != AF_INET6 ||
1190             msg->nduseropt_icmp_type != ND_ROUTER_ADVERT ||
1191             msg->nduseropt_icmp_code != 0)
1192                 return;
1193
1194         interface = connman_inet_ifname(msg->nduseropt_ifindex);
1195         if (!interface)
1196                 return;
1197
1198         for (opt = (void *)&msg[1];
1199              msglen >= 2 && msglen >= opt->nd_opt_len && opt->nd_opt_len;
1200              msglen -= opt->nd_opt_len,
1201                      opt = ((void *)opt) + opt->nd_opt_len*8) {
1202
1203                 DBG("nd opt type %d len %d\n",
1204                     opt->nd_opt_type, opt->nd_opt_len);
1205
1206                 if (opt->nd_opt_type == 25)
1207                         servers = rtnl_nd_opt_rdnss(opt, &lifetime,
1208                                                     &nr_servers);
1209                 else if (opt->nd_opt_type == 31)
1210                         domains = rtnl_nd_opt_dnssl(opt, &lifetime);
1211         }
1212
1213         if (nr_servers) {
1214                 int i, j;
1215                 char buf[40];
1216
1217                 for (i = 0; i < nr_servers; i++) {
1218                         if (!inet_ntop(AF_INET6, servers + i, buf, sizeof(buf)))
1219                                 continue;
1220
1221                         if (domains == NULL || domains[0] == NULL) {
1222                                 connman_resolver_append_lifetime(interface,
1223                                                         NULL, buf, lifetime);
1224                                 continue;
1225                         }
1226
1227                         for (j = 0; domains[j]; j++)
1228                                 connman_resolver_append_lifetime(interface,
1229                                                                 domains[j],
1230                                                                 buf, lifetime);
1231                 }
1232         }
1233         g_free(domains);
1234         g_free(interface);
1235 }
1236
1237 static const char *type2string(uint16_t type)
1238 {
1239         switch (type) {
1240         case NLMSG_NOOP:
1241                 return "NOOP";
1242         case NLMSG_ERROR:
1243                 return "ERROR";
1244         case NLMSG_DONE:
1245                 return "DONE";
1246         case NLMSG_OVERRUN:
1247                 return "OVERRUN";
1248         case RTM_GETLINK:
1249                 return "GETLINK";
1250         case RTM_NEWLINK:
1251                 return "NEWLINK";
1252         case RTM_DELLINK:
1253                 return "DELLINK";
1254         case RTM_NEWADDR:
1255                 return "NEWADDR";
1256         case RTM_DELADDR:
1257                 return "DELADDR";
1258         case RTM_GETROUTE:
1259                 return "GETROUTE";
1260         case RTM_NEWROUTE:
1261                 return "NEWROUTE";
1262         case RTM_DELROUTE:
1263                 return "DELROUTE";
1264         case RTM_NEWNDUSEROPT:
1265                 return "NEWNDUSEROPT";
1266         default:
1267                 return "UNKNOWN";
1268         }
1269 }
1270
1271 static GIOChannel *channel = NULL;
1272
1273 struct rtnl_request {
1274         struct nlmsghdr hdr;
1275         struct rtgenmsg msg;
1276 };
1277 #define RTNL_REQUEST_SIZE  (sizeof(struct nlmsghdr) + sizeof(struct rtgenmsg))
1278
1279 static GSList *request_list = NULL;
1280 static guint32 request_seq = 0;
1281
1282 static struct rtnl_request *find_request(guint32 seq)
1283 {
1284         GSList *list;
1285
1286         for (list = request_list; list; list = list->next) {
1287                 struct rtnl_request *req = list->data;
1288
1289                 if (req->hdr.nlmsg_seq == seq)
1290                         return req;
1291         }
1292
1293         return NULL;
1294 }
1295
1296 static int send_request(struct rtnl_request *req)
1297 {
1298         struct sockaddr_nl addr;
1299         int sk;
1300
1301         DBG("%s len %d type %d flags 0x%04x seq %d",
1302                                 type2string(req->hdr.nlmsg_type),
1303                                 req->hdr.nlmsg_len, req->hdr.nlmsg_type,
1304                                 req->hdr.nlmsg_flags, req->hdr.nlmsg_seq);
1305
1306         sk = g_io_channel_unix_get_fd(channel);
1307
1308         memset(&addr, 0, sizeof(addr));
1309         addr.nl_family = AF_NETLINK;
1310
1311         return sendto(sk, req, req->hdr.nlmsg_len, 0,
1312                                 (struct sockaddr *) &addr, sizeof(addr));
1313 }
1314
1315 static int queue_request(struct rtnl_request *req)
1316 {
1317         request_list = g_slist_append(request_list, req);
1318
1319         if (g_slist_length(request_list) > 1)
1320                 return 0;
1321
1322         return send_request(req);
1323 }
1324
1325 static int process_response(guint32 seq)
1326 {
1327         struct rtnl_request *req;
1328
1329         DBG("seq %d", seq);
1330
1331         req = find_request(seq);
1332         if (req != NULL) {
1333                 request_list = g_slist_remove(request_list, req);
1334                 g_free(req);
1335         }
1336
1337         req = g_slist_nth_data(request_list, 0);
1338         if (req == NULL)
1339                 return 0;
1340
1341         return send_request(req);
1342 }
1343
1344 static void rtnl_message(void *buf, size_t len)
1345 {
1346         DBG("buf %p len %zd", buf, len);
1347
1348         while (len > 0) {
1349                 struct nlmsghdr *hdr = buf;
1350                 struct nlmsgerr *err;
1351
1352                 if (!NLMSG_OK(hdr, len))
1353                         break;
1354
1355                 DBG("%s len %d type %d flags 0x%04x seq %d",
1356                                         type2string(hdr->nlmsg_type),
1357                                         hdr->nlmsg_len, hdr->nlmsg_type,
1358                                         hdr->nlmsg_flags, hdr->nlmsg_seq);
1359
1360                 switch (hdr->nlmsg_type) {
1361                 case NLMSG_NOOP:
1362                 case NLMSG_OVERRUN:
1363                         return;
1364                 case NLMSG_DONE:
1365                         process_response(hdr->nlmsg_seq);
1366                         return;
1367                 case NLMSG_ERROR:
1368                         err = NLMSG_DATA(hdr);
1369                         DBG("error %d (%s)", -err->error,
1370                                                 strerror(-err->error));
1371                         return;
1372                 case RTM_NEWLINK:
1373                         rtnl_newlink(hdr);
1374                         break;
1375                 case RTM_DELLINK:
1376                         rtnl_dellink(hdr);
1377                         break;
1378                 case RTM_NEWADDR:
1379                         rtnl_newaddr(hdr);
1380                         break;
1381                 case RTM_DELADDR:
1382                         rtnl_deladdr(hdr);
1383                         break;
1384                 case RTM_NEWROUTE:
1385                         rtnl_newroute(hdr);
1386                         break;
1387                 case RTM_DELROUTE:
1388                         rtnl_delroute(hdr);
1389                         break;
1390                 case RTM_NEWNDUSEROPT:
1391                         rtnl_newnduseropt(hdr);
1392                         break;
1393                 }
1394
1395                 len -= hdr->nlmsg_len;
1396                 buf += hdr->nlmsg_len;
1397         }
1398 }
1399
1400 static gboolean netlink_event(GIOChannel *chan,
1401                                 GIOCondition cond, gpointer data)
1402 {
1403         unsigned char buf[4096];
1404         gsize len;
1405         GIOStatus status;
1406
1407         if (cond & (G_IO_NVAL | G_IO_HUP | G_IO_ERR))
1408                 return FALSE;
1409
1410         memset(buf, 0, sizeof(buf));
1411
1412         status = g_io_channel_read_chars(chan, (gchar *) buf,
1413                                                 sizeof(buf), &len, NULL);
1414
1415         switch (status) {
1416         case G_IO_STATUS_NORMAL:
1417                 break;
1418         case G_IO_STATUS_AGAIN:
1419                 return TRUE;
1420         default:
1421                 return FALSE;
1422         }
1423
1424         rtnl_message(buf, len);
1425
1426         return TRUE;
1427 }
1428
1429 static int send_getlink(void)
1430 {
1431         struct rtnl_request *req;
1432
1433         DBG("");
1434
1435         req = g_try_malloc0(RTNL_REQUEST_SIZE);
1436         if (req == NULL)
1437                 return -ENOMEM;
1438
1439         req->hdr.nlmsg_len = RTNL_REQUEST_SIZE;
1440         req->hdr.nlmsg_type = RTM_GETLINK;
1441         req->hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
1442         req->hdr.nlmsg_pid = 0;
1443         req->hdr.nlmsg_seq = request_seq++;
1444         req->msg.rtgen_family = AF_INET;
1445
1446         return queue_request(req);
1447 }
1448
1449 static int send_getaddr(void)
1450 {
1451         struct rtnl_request *req;
1452
1453         DBG("");
1454
1455         req = g_try_malloc0(RTNL_REQUEST_SIZE);
1456         if (req == NULL)
1457                 return -ENOMEM;
1458
1459         req->hdr.nlmsg_len = RTNL_REQUEST_SIZE;
1460         req->hdr.nlmsg_type = RTM_GETADDR;
1461         req->hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
1462         req->hdr.nlmsg_pid = 0;
1463         req->hdr.nlmsg_seq = request_seq++;
1464         req->msg.rtgen_family = AF_INET;
1465
1466         return queue_request(req);
1467 }
1468
1469 static int send_getroute(void)
1470 {
1471         struct rtnl_request *req;
1472
1473         DBG("");
1474
1475         req = g_try_malloc0(RTNL_REQUEST_SIZE);
1476         if (req == NULL)
1477                 return -ENOMEM;
1478
1479         req->hdr.nlmsg_len = RTNL_REQUEST_SIZE;
1480         req->hdr.nlmsg_type = RTM_GETROUTE;
1481         req->hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
1482         req->hdr.nlmsg_pid = 0;
1483         req->hdr.nlmsg_seq = request_seq++;
1484         req->msg.rtgen_family = AF_INET;
1485
1486         return queue_request(req);
1487 }
1488
1489 static gboolean update_timeout_cb(gpointer user_data)
1490 {
1491         __connman_rtnl_request_update();
1492
1493         return TRUE;
1494 }
1495
1496 static void update_interval_callback(guint min)
1497 {
1498         if (update_timeout > 0)
1499                 g_source_remove(update_timeout);
1500
1501         if (min < G_MAXUINT) {
1502                 update_interval = min;
1503                 update_timeout = g_timeout_add_seconds(update_interval,
1504                                                 update_timeout_cb, NULL);
1505         } else {
1506                 update_timeout = 0;
1507                 update_interval = G_MAXUINT;
1508         }
1509 }
1510
1511 static gint compare_interval(gconstpointer a, gconstpointer b)
1512 {
1513         guint val_a = GPOINTER_TO_UINT(a);
1514         guint val_b = GPOINTER_TO_UINT(b);
1515
1516         return val_a - val_b;
1517 }
1518
1519 unsigned int __connman_rtnl_update_interval_add(unsigned int interval)
1520 {
1521         guint min;
1522
1523         if (interval == 0)
1524                 return 0;
1525
1526         update_list = g_slist_insert_sorted(update_list,
1527                         GUINT_TO_POINTER(interval), compare_interval);
1528
1529         min = GPOINTER_TO_UINT(g_slist_nth_data(update_list, 0));
1530         if (min < update_interval) {
1531                 update_interval_callback(min);
1532                 __connman_rtnl_request_update();
1533         }
1534
1535         return update_interval;
1536 }
1537
1538 unsigned int __connman_rtnl_update_interval_remove(unsigned int interval)
1539 {
1540         guint min = G_MAXUINT;
1541
1542         if (interval == 0)
1543                 return 0;
1544
1545         update_list = g_slist_remove(update_list, GINT_TO_POINTER(interval));
1546
1547         if (update_list != NULL)
1548                 min = GPOINTER_TO_UINT(g_slist_nth_data(update_list, 0));
1549
1550         if (min > update_interval)
1551                 update_interval_callback(min);
1552
1553         return min;
1554 }
1555
1556 int __connman_rtnl_request_update(void)
1557 {
1558         return send_getlink();
1559 }
1560
1561 int __connman_rtnl_init(void)
1562 {
1563         struct sockaddr_nl addr;
1564         int sk;
1565
1566         DBG("");
1567
1568         interface_list = g_hash_table_new_full(g_direct_hash, g_direct_equal,
1569                                                         NULL, free_interface);
1570
1571         sk = socket(PF_NETLINK, SOCK_DGRAM | SOCK_CLOEXEC, NETLINK_ROUTE);
1572         if (sk < 0)
1573                 return -1;
1574
1575         memset(&addr, 0, sizeof(addr));
1576         addr.nl_family = AF_NETLINK;
1577         addr.nl_groups = RTMGRP_LINK | RTMGRP_IPV4_IFADDR | RTMGRP_IPV4_ROUTE |
1578                                 RTMGRP_IPV6_IFADDR | RTMGRP_IPV6_ROUTE |
1579                                 (1<<(RTNLGRP_ND_USEROPT-1));
1580
1581         if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1582                 close(sk);
1583                 return -1;
1584         }
1585
1586         channel = g_io_channel_unix_new(sk);
1587         g_io_channel_set_close_on_unref(channel, TRUE);
1588
1589         g_io_channel_set_encoding(channel, NULL, NULL);
1590         g_io_channel_set_buffered(channel, FALSE);
1591
1592         g_io_add_watch(channel, G_IO_IN | G_IO_NVAL | G_IO_HUP | G_IO_ERR,
1593                                                         netlink_event, NULL);
1594
1595         return 0;
1596 }
1597
1598 void __connman_rtnl_start(void)
1599 {
1600         DBG("");
1601
1602         send_getlink();
1603         send_getaddr();
1604         send_getroute();
1605 }
1606
1607 void __connman_rtnl_cleanup(void)
1608 {
1609         GSList *list;
1610
1611         DBG("");
1612
1613         for (list = watch_list; list; list = list->next) {
1614                 struct watch_data *watch = list->data;
1615
1616                 DBG("removing watch %d", watch->id);
1617
1618                 g_free(watch);
1619                 list->data = NULL;
1620         }
1621
1622         g_slist_free(watch_list);
1623         watch_list = NULL;
1624
1625         g_slist_free(update_list);
1626         update_list = NULL;
1627
1628         for (list = request_list; list; list = list->next) {
1629                 struct rtnl_request *req = list->data;
1630
1631                 DBG("%s len %d type %d flags 0x%04x seq %d",
1632                                 type2string(req->hdr.nlmsg_type),
1633                                 req->hdr.nlmsg_len, req->hdr.nlmsg_type,
1634                                 req->hdr.nlmsg_flags, req->hdr.nlmsg_seq);
1635
1636                 g_free(req);
1637                 list->data = NULL;
1638         }
1639
1640         g_slist_free(request_list);
1641         request_list = NULL;
1642
1643         g_io_channel_shutdown(channel, TRUE, NULL);
1644         g_io_channel_unref(channel);
1645
1646         channel = NULL;
1647
1648         g_hash_table_destroy(interface_list);
1649 }