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