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_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 process_newaddr(unsigned char family, unsigned char prefixlen,
 532                                 int index, struct ifaddrmsg *msg, int bytes)
 533 {
 534         struct in_addr address = { INADDR_ANY };
 535         const char *label = NULL;
 536
 537         if (family != AF_INET)
 538                 return;
 539
 540         extract_addr(msg, bytes, &label, &address, NULL, NULL);
 541
 542         __connman_ipconfig_newaddr(index, label,
 543                                         prefixlen, inet_ntoa(address));
 544 }
 545
 546 static void process_deladdr(unsigned char family, unsigned char prefixlen,
 547                                 int index, struct ifaddrmsg *msg, int bytes)
 548 {
 549         struct in_addr address = { INADDR_ANY };
 550         const char *label = NULL;
 551
 552         if (family != AF_INET)
 553                 return;
 554
 555         extract_addr(msg, bytes, &label, &address, NULL, NULL);
 556
 557         __connman_ipconfig_deladdr(index, label,
 558                                         prefixlen, inet_ntoa(address));
 559 }
 560
 561 static void extract_route(struct rtmsg *msg, int bytes, int *index,
 562                                                 struct in_addr *dst,
 563                                                 struct in_addr *gateway)
 564 {
 565         struct rtattr *attr;
 566
 567         for (attr = RTM_RTA(msg); RTA_OK(attr, bytes);
 568                                         attr = RTA_NEXT(attr, bytes)) {
 569                 switch (attr->rta_type) {
 570                 case RTA_DST:
 571                         if (dst != NULL)
 572                                 *dst = *((struct in_addr *) RTA_DATA(attr));
 573                         break;
 574                 case RTA_GATEWAY:
 575                         if (gateway != NULL)
 576                                 *gateway = *((struct in_addr *) RTA_DATA(attr));
 577                         break;
 578                 case RTA_OIF:
 579                         if (index != NULL)
 580                                 *index = *((int *) RTA_DATA(attr));
 581                         break;
 582                 }
 583         }
 584 }
 585
 586 static void process_newroute(unsigned char family, unsigned char scope,
 587                                                 struct rtmsg *msg, int bytes)
 588 {
 589         GSList *list;
 590         struct in_addr dst = { INADDR_ANY }, gateway = { INADDR_ANY };
 591         char dststr[16], gatewaystr[16];
 592         int index = -1;
 593
 594         if (family != AF_INET)
 595                 return;
 596
 597         extract_route(msg, bytes, &index, &dst, &gateway);
 598
 599         inet_ntop(family, &dst, dststr, sizeof(dststr));
 600         inet_ntop(family, &gateway, gatewaystr, sizeof(gatewaystr));
 601
 602         __connman_ipconfig_newroute(index, scope, dststr, gatewaystr);
 603
 604         /* skip host specific routes */
 605         if (scope != RT_SCOPE_UNIVERSE &&
 606                         !(scope == RT_SCOPE_LINK && dst.s_addr == INADDR_ANY))
 607                 return;
 608
 609         if (dst.s_addr != INADDR_ANY)
 610                 return;
 611
 612         for (list = rtnl_list; list; list = list->next) {
 613                 struct connman_rtnl *rtnl = list->data;
 614
 615                 if (rtnl->newgateway)
 616                         rtnl->newgateway(index, gatewaystr);
 617         }
 618 }
 619
 620 static void process_delroute(unsigned char family, unsigned char scope,
 621                                                 struct rtmsg *msg, int bytes)
 622 {
 623         GSList *list;
 624         struct in_addr dst = { INADDR_ANY }, gateway = { INADDR_ANY };
 625         char dststr[16], gatewaystr[16];
 626         int index = -1;
 627
 628         if (family != AF_INET)
 629                 return;
 630
 631         extract_route(msg, bytes, &index, &dst, &gateway);
 632
 633         inet_ntop(family, &dst, dststr, sizeof(dststr));
 634         inet_ntop(family, &gateway, gatewaystr, sizeof(gatewaystr));
 635
 636         __connman_ipconfig_delroute(index, scope, dststr, gatewaystr);
 637
 638         /* skip host specific routes */
 639         if (scope != RT_SCOPE_UNIVERSE &&
 640                         !(scope == RT_SCOPE_LINK && dst.s_addr == INADDR_ANY))
 641                 return;
 642
 643         if (dst.s_addr != INADDR_ANY)
 644                 return;
 645
 646         for (list = rtnl_list; list; list = list->next) {
 647                 struct connman_rtnl *rtnl = list->data;
 648
 649                 if (rtnl->delgateway)
 650                         rtnl->delgateway(index, gatewaystr);
 651         }
 652 }
 653
 654 static inline void print_ether(struct rtattr *attr, const char *name)
 655 {
 656         int len = (int) RTA_PAYLOAD(attr);
 657
 658         if (len == ETH_ALEN) {
 659                 struct ether_addr eth;
 660                 memcpy(&eth, RTA_DATA(attr), ETH_ALEN);
 661                 print("  attr %s (len %d) %s\n", name, len, ether_ntoa(&eth));
 662         } else
 663                 print("  attr %s (len %d)\n", name, len);
 664 }
 665
 666 static inline void print_inet(struct rtattr *attr, const char *name,
 667                                                         unsigned char family)
 668 {
 669         int len = (int) RTA_PAYLOAD(attr);
 670
 671         if (family == AF_INET && len == sizeof(struct in_addr)) {
 672                 struct in_addr addr;
 673                 addr = *((struct in_addr *) RTA_DATA(attr));
 674                 print("  attr %s (len %d) %s\n", name, len, inet_ntoa(addr));
 675         } else
 676                 print("  attr %s (len %d)\n", name, len);
 677 }
 678
 679 static inline void print_string(struct rtattr *attr, const char *name)
 680 {
 681         print("  attr %s (len %d) %s\n", name, (int) RTA_PAYLOAD(attr),
 682                                                 (char *) RTA_DATA(attr));
 683 }
 684
 685 static inline void print_byte(struct rtattr *attr, const char *name)
 686 {
 687         print("  attr %s (len %d) 0x%02x\n", name, (int) RTA_PAYLOAD(attr),
 688                                         *((unsigned char *) RTA_DATA(attr)));
 689 }
 690
 691 static inline void print_integer(struct rtattr *attr, const char *name)
 692 {
 693         print("  attr %s (len %d) %d\n", name, (int) RTA_PAYLOAD(attr),
 694                                                 *((int *) RTA_DATA(attr)));
 695 }
 696
 697 static inline void print_attr(struct rtattr *attr, const char *name)
 698 {
 699         int len = (int) RTA_PAYLOAD(attr);
 700
 701         if (name && len > 0)
 702                 print("  attr %s (len %d)\n", name, len);
 703         else
 704                 print("  attr %d (len %d)\n", attr->rta_type, len);
 705 }
 706
 707 static void rtnl_link(struct nlmsghdr *hdr)
 708 {
 709         struct ifinfomsg *msg;
 710         struct rtattr *attr;
 711         int bytes;
 712
 713         msg = (struct ifinfomsg *) NLMSG_DATA(hdr);
 714         bytes = IFLA_PAYLOAD(hdr);
 715
 716         print("ifi_index %d ifi_flags 0x%04x", msg->ifi_index, msg->ifi_flags);
 717
 718         for (attr = IFLA_RTA(msg); RTA_OK(attr, bytes);
 719                                         attr = RTA_NEXT(attr, bytes)) {
 720                 switch (attr->rta_type) {
 721                 case IFLA_ADDRESS:
 722                         print_ether(attr, "address");
 723                         break;
 724                 case IFLA_BROADCAST:
 725                         print_ether(attr, "broadcast");
 726                         break;
 727                 case IFLA_IFNAME:
 728                         print_string(attr, "ifname");
 729                         break;
 730                 case IFLA_MTU:
 731                         print_integer(attr, "mtu");
 732                         break;
 733                 case IFLA_LINK:
 734                         print_attr(attr, "link");
 735                         break;
 736                 case IFLA_QDISC:
 737                         print_attr(attr, "qdisc");
 738                         break;
 739                 case IFLA_STATS:
 740                         print_attr(attr, "stats");
 741                         break;
 742                 case IFLA_COST:
 743                         print_attr(attr, "cost");
 744                         break;
 745                 case IFLA_PRIORITY:
 746                         print_attr(attr, "priority");
 747                         break;
 748                 case IFLA_MASTER:
 749                         print_attr(attr, "master");
 750                         break;
 751                 case IFLA_WIRELESS:
 752                         print_attr(attr, "wireless");
 753                         break;
 754                 case IFLA_PROTINFO:
 755                         print_attr(attr, "protinfo");
 756                         break;
 757                 case IFLA_TXQLEN:
 758                         print_integer(attr, "txqlen");
 759                         break;
 760                 case IFLA_MAP:
 761                         print_attr(attr, "map");
 762                         break;
 763                 case IFLA_WEIGHT:
 764                         print_attr(attr, "weight");
 765                         break;
 766                 case IFLA_OPERSTATE:
 767                         print_byte(attr, "operstate");
 768                         break;
 769                 case IFLA_LINKMODE:
 770                         print_byte(attr, "linkmode");
 771                         break;
 772                 default:
 773                         print_attr(attr, NULL);
 774                         break;
 775                 }
 776         }
 777 }
 778
 779 static void rtnl_newlink(struct nlmsghdr *hdr)
 780 {
 781         struct ifinfomsg *msg = (struct ifinfomsg *) NLMSG_DATA(hdr);
 782
 783         rtnl_link(hdr);
 784
 785         process_newlink(msg->ifi_type, msg->ifi_index, msg->ifi_flags,
 786                                 msg->ifi_change, msg, IFA_PAYLOAD(hdr));
 787 }
 788
 789 static void rtnl_dellink(struct nlmsghdr *hdr)
 790 {
 791         struct ifinfomsg *msg = (struct ifinfomsg *) NLMSG_DATA(hdr);
 792
 793         rtnl_link(hdr);
 794
 795         process_dellink(msg->ifi_type, msg->ifi_index, msg->ifi_flags,
 796                                 msg->ifi_change, msg, IFA_PAYLOAD(hdr));
 797 }
 798
 799 static void rtnl_addr(struct nlmsghdr *hdr)
 800 {
 801         struct ifaddrmsg *msg;
 802         struct rtattr *attr;
 803         int bytes;
 804
 805         msg = (struct ifaddrmsg *) NLMSG_DATA(hdr);
 806         bytes = IFA_PAYLOAD(hdr);
 807
 808         print("ifa_family %d ifa_index %d", msg->ifa_family, msg->ifa_index);
 809
 810         for (attr = IFA_RTA(msg); RTA_OK(attr, bytes);
 811                                         attr = RTA_NEXT(attr, bytes)) {
 812                 switch (attr->rta_type) {
 813                 case IFA_ADDRESS:
 814                         print_inet(attr, "address", msg->ifa_family);
 815                         break;
 816                 case IFA_LOCAL:
 817                         print_inet(attr, "local", msg->ifa_family);
 818                         break;
 819                 case IFA_LABEL:
 820                         print_string(attr, "label");
 821                         break;
 822                 case IFA_BROADCAST:
 823                         print_inet(attr, "broadcast", msg->ifa_family);
 824                         break;
 825                 case IFA_ANYCAST:
 826                         print_attr(attr, "anycast");
 827                         break;
 828                 case IFA_CACHEINFO:
 829                         print_attr(attr, "cacheinfo");
 830                         break;
 831                 case IFA_MULTICAST:
 832                         print_attr(attr, "multicast");
 833                         break;
 834                 default:
 835                         print_attr(attr, NULL);
 836                         break;
 837                 }
 838         }
 839 }
 840
 841 static void rtnl_newaddr(struct nlmsghdr *hdr)
 842 {
 843         struct ifaddrmsg *msg = (struct ifaddrmsg *) NLMSG_DATA(hdr);
 844
 845         rtnl_addr(hdr);
 846
 847         process_newaddr(msg->ifa_family, msg->ifa_prefixlen, msg->ifa_index,
 848                                                 msg, IFA_PAYLOAD(hdr));
 849 }
 850
 851 static void rtnl_deladdr(struct nlmsghdr *hdr)
 852 {
 853         struct ifaddrmsg *msg = (struct ifaddrmsg *) NLMSG_DATA(hdr);
 854
 855         rtnl_addr(hdr);
 856
 857         process_deladdr(msg->ifa_family, msg->ifa_prefixlen, msg->ifa_index,
 858                                                 msg, IFA_PAYLOAD(hdr));
 859 }
 860
 861 static void rtnl_route(struct nlmsghdr *hdr)
 862 {
 863         struct rtmsg *msg;
 864         struct rtattr *attr;
 865         int bytes;
 866
 867         msg = (struct rtmsg *) NLMSG_DATA(hdr);
 868         bytes = RTM_PAYLOAD(hdr);
 869
 870         print("rtm_family %d rtm_table %d rtm_protocol %d",
 871                         msg->rtm_family, msg->rtm_table, msg->rtm_protocol);
 872         print("rtm_scope %d rtm_type %d rtm_flags 0x%04x",
 873                                 msg->rtm_scope, msg->rtm_type, msg->rtm_flags);
 874
 875         for (attr = RTM_RTA(msg); RTA_OK(attr, bytes);
 876                                         attr = RTA_NEXT(attr, bytes)) {
 877                 switch (attr->rta_type) {
 878                 case RTA_DST:
 879                         print_inet(attr, "dst", msg->rtm_family);
 880                         break;
 881                 case RTA_SRC:
 882                         print_inet(attr, "src", msg->rtm_family);
 883                         break;
 884                 case RTA_IIF:
 885                         print_string(attr, "iif");
 886                         break;
 887                 case RTA_OIF:
 888                         print_integer(attr, "oif");
 889                         break;
 890                 case RTA_GATEWAY:
 891                         print_inet(attr, "gateway", msg->rtm_family);
 892                         break;
 893                 case RTA_PRIORITY:
 894                         print_attr(attr, "priority");
 895                         break;
 896                 case RTA_PREFSRC:
 897                         print_inet(attr, "prefsrc", msg->rtm_family);
 898                         break;
 899                 case RTA_METRICS:
 900                         print_attr(attr, "metrics");
 901                         break;
 902                 case RTA_TABLE:
 903                         print_integer(attr, "table");
 904                         break;
 905                 default:
 906                         print_attr(attr, NULL);
 907                         break;
 908                 }
 909         }
 910 }
 911
 912 static connman_bool_t is_route_rtmsg(struct rtmsg *msg)
 913 {
 914
 915         if (msg->rtm_table != RT_TABLE_MAIN)
 916                 return FALSE;
 917
 918         if (msg->rtm_protocol != RTPROT_BOOT &&
 919                         msg->rtm_protocol != RTPROT_KERNEL)
 920                 return FALSE;
 921
 922         if (msg->rtm_type != RTN_UNICAST)
 923                 return FALSE;
 924
 925         return TRUE;
 926 }
 927
 928 static void rtnl_newroute(struct nlmsghdr *hdr)
 929 {
 930         struct rtmsg *msg = (struct rtmsg *) NLMSG_DATA(hdr);
 931
 932         rtnl_route(hdr);
 933
 934         if (is_route_rtmsg(msg))
 935                 process_newroute(msg->rtm_family, msg->rtm_scope,
 936                                                 msg, RTM_PAYLOAD(hdr));
 937 }
 938
 939 static void rtnl_delroute(struct nlmsghdr *hdr)
 940 {
 941         struct rtmsg *msg = (struct rtmsg *) NLMSG_DATA(hdr);
 942
 943         rtnl_route(hdr);
 944
 945         if (is_route_rtmsg(msg))
 946                 process_delroute(msg->rtm_family, msg->rtm_scope,
 947                                                 msg, RTM_PAYLOAD(hdr));
 948 }
 949
 950 static const char *type2string(uint16_t type)
 951 {
 952         switch (type) {
 953         case NLMSG_NOOP:
 954                 return "NOOP";
 955         case NLMSG_ERROR:
 956                 return "ERROR";
 957         case NLMSG_DONE:
 958                 return "DONE";
 959         case NLMSG_OVERRUN:
 960                 return "OVERRUN";
 961         case RTM_GETLINK:
 962                 return "GETLINK";
 963         case RTM_NEWLINK:
 964                 return "NEWLINK";
 965         case RTM_DELLINK:
 966                 return "DELLINK";
 967         case RTM_NEWADDR:
 968                 return "NEWADDR";
 969         case RTM_DELADDR:
 970                 return "DELADDR";
 971         case RTM_GETROUTE:
 972                 return "GETROUTE";
 973         case RTM_NEWROUTE:
 974                 return "NEWROUTE";
 975         case RTM_DELROUTE:
 976                 return "DELROUTE";
 977         default:
 978                 return "UNKNOWN";
 979         }
 980 }
 981
 982 static GIOChannel *channel = NULL;
 983
 984 struct rtnl_request {
 985         struct nlmsghdr hdr;
 986         struct rtgenmsg msg;
 987 };
 988 #define RTNL_REQUEST_SIZE  (sizeof(struct nlmsghdr) + sizeof(struct rtgenmsg))
 989
 990 static GSList *request_list = NULL;
 991 static guint32 request_seq = 0;
 992
 993 static struct rtnl_request *find_request(guint32 seq)
 994 {
 995         GSList *list;
 996
 997         for (list = request_list; list; list = list->next) {
 998                 struct rtnl_request *req = list->data;
 999
1000                 if (req->hdr.nlmsg_seq == seq)
1001                         return req;
1002         }
1003
1004         return NULL;
1005 }
1006
1007 static int send_request(struct rtnl_request *req)
1008 {
1009         struct sockaddr_nl addr;
1010         int sk;
1011
1012         DBG("%s len %d type %d flags 0x%04x seq %d",
1013                                 type2string(req->hdr.nlmsg_type),
1014                                 req->hdr.nlmsg_len, req->hdr.nlmsg_type,
1015                                 req->hdr.nlmsg_flags, req->hdr.nlmsg_seq);
1016
1017         sk = g_io_channel_unix_get_fd(channel);
1018
1019         memset(&addr, 0, sizeof(addr));
1020         addr.nl_family = AF_NETLINK;
1021
1022         return sendto(sk, req, req->hdr.nlmsg_len, 0,
1023                                 (struct sockaddr *) &addr, sizeof(addr));
1024 }
1025
1026 static int queue_request(struct rtnl_request *req)
1027 {
1028         request_list = g_slist_append(request_list, req);
1029
1030         if (g_slist_length(request_list) > 1)
1031                 return 0;
1032
1033         return send_request(req);
1034 }
1035
1036 static int process_response(guint32 seq)
1037 {
1038         struct rtnl_request *req;
1039
1040         DBG("seq %d", seq);
1041
1042         req = find_request(seq);
1043         if (req != NULL) {
1044                 request_list = g_slist_remove(request_list, req);
1045                 g_free(req);
1046         }
1047
1048         req = g_slist_nth_data(request_list, 0);
1049         if (req == NULL)
1050                 return 0;
1051
1052         return send_request(req);
1053 }
1054
1055 static void rtnl_message(void *buf, size_t len)
1056 {
1057         DBG("buf %p len %zd", buf, len);
1058
1059         while (len > 0) {
1060                 struct nlmsghdr *hdr = buf;
1061                 struct nlmsgerr *err;
1062
1063                 if (!NLMSG_OK(hdr, len))
1064                         break;
1065
1066                 DBG("%s len %d type %d flags 0x%04x seq %d",
1067                                         type2string(hdr->nlmsg_type),
1068                                         hdr->nlmsg_len, hdr->nlmsg_type,
1069                                         hdr->nlmsg_flags, hdr->nlmsg_seq);
1070
1071                 switch (hdr->nlmsg_type) {
1072                 case NLMSG_NOOP:
1073                 case NLMSG_OVERRUN:
1074                         return;
1075                 case NLMSG_DONE:
1076                         process_response(hdr->nlmsg_seq);
1077                         return;
1078                 case NLMSG_ERROR:
1079                         err = NLMSG_DATA(hdr);
1080                         DBG("error %d (%s)", -err->error,
1081                                                 strerror(-err->error));
1082                         return;
1083                 case RTM_NEWLINK:
1084                         rtnl_newlink(hdr);
1085                         break;
1086                 case RTM_DELLINK:
1087                         rtnl_dellink(hdr);
1088                         break;
1089                 case RTM_NEWADDR:
1090                         rtnl_newaddr(hdr);
1091                         break;
1092                 case RTM_DELADDR:
1093                         rtnl_deladdr(hdr);
1094                         break;
1095                 case RTM_NEWROUTE:
1096                         rtnl_newroute(hdr);
1097                         break;
1098                 case RTM_DELROUTE:
1099                         rtnl_delroute(hdr);
1100                         break;
1101                 }
1102
1103                 len -= hdr->nlmsg_len;
1104                 buf += hdr->nlmsg_len;
1105         }
1106 }
1107
1108 static gboolean netlink_event(GIOChannel *chan,
1109                                 GIOCondition cond, gpointer data)
1110 {
1111         unsigned char buf[4096];
1112         gsize len;
1113         GIOError err;
1114
1115         if (cond & (G_IO_NVAL | G_IO_HUP | G_IO_ERR))
1116                 return FALSE;
1117
1118         memset(buf, 0, sizeof(buf));
1119
1120         err = g_io_channel_read(chan, (gchar *) buf, sizeof(buf), &len);
1121         if (err) {
1122                 if (err == G_IO_ERROR_AGAIN)
1123                         return TRUE;
1124                 return FALSE;
1125         }
1126
1127         rtnl_message(buf, len);
1128
1129         return TRUE;
1130 }
1131
1132 static int send_getlink(void)
1133 {
1134         struct rtnl_request *req;
1135
1136         DBG("");
1137
1138         req = g_try_malloc0(RTNL_REQUEST_SIZE);
1139         if (req == NULL)
1140                 return -ENOMEM;
1141
1142         req->hdr.nlmsg_len = RTNL_REQUEST_SIZE;
1143         req->hdr.nlmsg_type = RTM_GETLINK;
1144         req->hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
1145         req->hdr.nlmsg_pid = 0;
1146         req->hdr.nlmsg_seq = request_seq++;
1147         req->msg.rtgen_family = AF_INET;
1148
1149         return queue_request(req);
1150 }
1151
1152 static int send_getaddr(void)
1153 {
1154         struct rtnl_request *req;
1155
1156         DBG("");
1157
1158         req = g_try_malloc0(RTNL_REQUEST_SIZE);
1159         if (req == NULL)
1160                 return -ENOMEM;
1161
1162         req->hdr.nlmsg_len = RTNL_REQUEST_SIZE;
1163         req->hdr.nlmsg_type = RTM_GETADDR;
1164         req->hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
1165         req->hdr.nlmsg_pid = 0;
1166         req->hdr.nlmsg_seq = request_seq++;
1167         req->msg.rtgen_family = AF_INET;
1168
1169         return queue_request(req);
1170 }
1171
1172 static int send_getroute(void)
1173 {
1174         struct rtnl_request *req;
1175
1176         DBG("");
1177
1178         req = g_try_malloc0(RTNL_REQUEST_SIZE);
1179         if (req == NULL)
1180                 return -ENOMEM;
1181
1182         req->hdr.nlmsg_len = RTNL_REQUEST_SIZE;
1183         req->hdr.nlmsg_type = RTM_GETROUTE;
1184         req->hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
1185         req->hdr.nlmsg_pid = 0;
1186         req->hdr.nlmsg_seq = request_seq++;
1187         req->msg.rtgen_family = AF_INET;
1188
1189         return queue_request(req);
1190 }
1191
1192 static gboolean update_timeout_cb(gpointer user_data)
1193 {
1194         __connman_rtnl_request_update();
1195
1196         return TRUE;
1197 }
1198
1199 static void update_interval_callback(guint min)
1200 {
1201         if (update_timeout > 0)
1202                 g_source_remove(update_timeout);
1203
1204         if (min < G_MAXUINT) {
1205                 update_interval = min;
1206                 update_timeout = g_timeout_add_seconds(update_interval,
1207                                                 update_timeout_cb, NULL);
1208         } else {
1209                 update_timeout = 0;
1210                 update_interval = G_MAXUINT;
1211         }
1212 }
1213
1214 static gint compare_interval(gconstpointer a, gconstpointer b)
1215 {
1216         guint val_a = GPOINTER_TO_UINT(a);
1217         guint val_b = GPOINTER_TO_UINT(b);
1218
1219         return val_a - val_b;
1220 }
1221
1222 unsigned int __connman_rtnl_update_interval_add(unsigned int interval)
1223 {
1224         guint min;
1225
1226         if (interval == 0)
1227                 return 0;
1228
1229         update_list = g_slist_insert_sorted(update_list,
1230                         GUINT_TO_POINTER(interval), compare_interval);
1231
1232         min = GPOINTER_TO_UINT(g_slist_nth_data(update_list, 0));
1233         if (min < update_interval) {
1234                 update_interval_callback(min);
1235                 __connman_rtnl_request_update();
1236         }
1237
1238         return update_interval;
1239 }
1240
1241 unsigned int __connman_rtnl_update_interval_remove(unsigned int interval)
1242 {
1243         guint min = G_MAXUINT;
1244
1245         if (interval == 0)
1246                 return 0;
1247
1248         update_list = g_slist_remove(update_list, GINT_TO_POINTER(interval));
1249
1250         if (update_list != NULL)
1251                 min = GPOINTER_TO_UINT(g_slist_nth_data(update_list, 0));
1252
1253         if (min > update_interval)
1254                 update_interval_callback(min);
1255
1256         return min;
1257 }
1258
1259 int __connman_rtnl_request_update(void)
1260 {
1261         return send_getlink();
1262 }
1263
1264 int __connman_rtnl_init(void)
1265 {
1266         struct sockaddr_nl addr;
1267         int sk;
1268
1269         DBG("");
1270
1271         interface_list = g_hash_table_new_full(g_direct_hash, g_direct_equal,
1272                                                         NULL, free_interface);
1273
1274         sk = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE);
1275         if (sk < 0)
1276                 return -1;
1277
1278         memset(&addr, 0, sizeof(addr));
1279         addr.nl_family = AF_NETLINK;
1280         addr.nl_groups = RTMGRP_LINK | RTMGRP_IPV4_IFADDR | RTMGRP_IPV4_ROUTE;
1281
1282         if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
1283                 close(sk);
1284                 return -1;
1285         }
1286
1287         channel = g_io_channel_unix_new(sk);
1288         g_io_channel_set_close_on_unref(channel, TRUE);
1289
1290         g_io_add_watch(channel, G_IO_IN | G_IO_NVAL | G_IO_HUP | G_IO_ERR,
1291                                                         netlink_event, NULL);
1292
1293         return 0;
1294 }
1295
1296 void __connman_rtnl_start(void)
1297 {
1298         DBG("");
1299
1300         send_getlink();
1301         send_getaddr();
1302         send_getroute();
1303 }
1304
1305 void __connman_rtnl_cleanup(void)
1306 {
1307         GSList *list;
1308
1309         DBG("");
1310
1311         for (list = watch_list; list; list = list->next) {
1312                 struct watch_data *watch = list->data;
1313
1314                 DBG("removing watch %d", watch->id);
1315
1316                 g_free(watch);
1317                 list->data = NULL;
1318         }
1319
1320         g_slist_free(watch_list);
1321         watch_list = NULL;
1322
1323         g_slist_free(update_list);
1324         update_list = NULL;
1325
1326         for (list = request_list; list; list = list->next) {
1327                 struct rtnl_request *req = list->data;
1328
1329                 DBG("%s len %d type %d flags 0x%04x seq %d",
1330                                 type2string(req->hdr.nlmsg_type),
1331                                 req->hdr.nlmsg_len, req->hdr.nlmsg_type,
1332                                 req->hdr.nlmsg_flags, req->hdr.nlmsg_seq);
1333
1334                 g_free(req);
1335                 list->data = NULL;
1336         }
1337
1338         g_slist_free(request_list);
1339         request_list = NULL;
1340
1341         g_io_channel_shutdown(channel, TRUE, NULL);
1342         g_io_channel_unref(channel);
1343
1344         channel = NULL;
1345
1346         g_hash_table_destroy(interface_list);
1347 }