git.meshlink.io Git - catta/blob - avahi-core/iface.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of avahi.
   5
   6   avahi is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as
   8   published by the Free Software Foundation; either version 2.1 of the
   9   License, or (at your option) any later version.
  10
  11   avahi is distributed in the hope that it will be useful, but WITHOUT
  12   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13   or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
  14   Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public
  17   License along with avahi; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <string.h>
  27 #include <sys/socket.h>
  28 #include <asm/types.h>
  29 #include <linux/netlink.h>
  30 #include <linux/rtnetlink.h>
  31 #include <errno.h>
  32 #include <net/if.h>
  33
  34 #include "iface.h"
  35 #include "netlink.h"
  36 #include "dns.h"
  37 #include "socket.h"
  38 #include "announce.h"
  39 #include "util.h"
  40
  41 static void update_address_rr(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a, gboolean remove) {
  42     g_assert(m);
  43     g_assert(a);
  44
  45     if (avahi_interface_address_relevant(a) &&
  46         !remove &&
  47         m->server->config.register_addresses &&
  48         (m->server->state == AVAHI_SERVER_RUNNING ||
  49         m->server->state == AVAHI_SERVER_REGISTERING)) {
  50
  51         if (!a->entry_group) {
  52             a->entry_group = avahi_entry_group_new(m->server, avahi_host_rr_entry_group_callback, NULL);
  53             avahi_server_add_address(m->server, a->entry_group, a->interface->hardware->index, a->interface->protocol, 0, NULL, &a->address);
  54             avahi_entry_group_commit(a->entry_group);
  55         }
  56     } else {
  57
  58         if (a->entry_group) {
  59
  60             if (avahi_entry_group_get_state(a->entry_group) == AVAHI_ENTRY_GROUP_REGISTERING)
  61                 avahi_server_decrease_host_rr_pending(m->server);
  62
  63             avahi_entry_group_free(a->entry_group);
  64             a->entry_group = NULL;
  65         }
  66     }
  67 }
  68
  69 static void update_interface_rr(AvahiInterfaceMonitor *m, AvahiInterface *i, gboolean remove) {
  70     AvahiInterfaceAddress *a;
  71
  72     g_assert(m);
  73     g_assert(i);
  74
  75     for (a = i->addresses; a; a = a->address_next)
  76         update_address_rr(m, a, remove);
  77 }
  78
  79 static void update_hw_interface_rr(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, gboolean remove) {
  80     AvahiInterface *i;
  81
  82     g_assert(m);
  83     g_assert(hw);
  84
  85     for (i = hw->interfaces; i; i = i->by_hardware_next)
  86         update_interface_rr(m, i, remove);
  87
  88     if (!remove &&
  89         m->server->config.register_workstation &&
  90         (m->server->state == AVAHI_SERVER_RUNNING ||
  91         m->server->state == AVAHI_SERVER_REGISTERING)) {
  92
  93         if (!hw->entry_group) {
  94             gchar *name;
  95             gchar *t = avahi_format_mac_address(hw->mac_address, hw->mac_address_size);
  96             name = g_strdup_printf("%s [%s]", m->server->host_name, t);
  97             g_free(t);
  98
  99             hw->entry_group = avahi_entry_group_new(m->server, avahi_host_rr_entry_group_callback, NULL);
 100             avahi_server_add_service(m->server, hw->entry_group, hw->index, AF_UNSPEC, "_workstation._tcp", name, NULL, NULL, 9, NULL);
 101             avahi_entry_group_commit(hw->entry_group);
 102
 103             g_free(name);
 104         }
 105
 106     } else {
 107
 108         if (hw->entry_group) {
 109
 110             if (avahi_entry_group_get_state(hw->entry_group) == AVAHI_ENTRY_GROUP_REGISTERING)
 111                 avahi_server_decrease_host_rr_pending(m->server);
 112
 113             avahi_entry_group_free(hw->entry_group);
 114             hw->entry_group = NULL;
 115         }
 116     }
 117 }
 118
 119 static void free_address(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a) {
 120     g_assert(m);
 121     g_assert(a);
 122     g_assert(a->interface);
 123
 124     update_address_rr(m, a, TRUE);
 125     AVAHI_LLIST_REMOVE(AvahiInterfaceAddress, address, a->interface->addresses, a);
 126
 127     g_free(a);
 128 }
 129
 130 static void free_interface(AvahiInterfaceMonitor *m, AvahiInterface *i, gboolean send_goodbye) {
 131     g_assert(m);
 132     g_assert(i);
 133
 134     avahi_goodbye_interface(m->server, i, send_goodbye);
 135     avahi_response_scheduler_force(i->response_scheduler);
 136
 137     g_assert(!i->announcements);
 138
 139     update_interface_rr(m, i, TRUE);
 140
 141     while (i->addresses)
 142         free_address(m, i->addresses);
 143
 144     avahi_response_scheduler_free(i->response_scheduler);
 145     avahi_query_scheduler_free(i->query_scheduler);
 146     avahi_probe_scheduler_free(i->probe_scheduler);
 147     avahi_cache_free(i->cache);
 148
 149     AVAHI_LLIST_REMOVE(AvahiInterface, interface, m->interfaces, i);
 150     AVAHI_LLIST_REMOVE(AvahiInterface, by_hardware, i->hardware->interfaces, i);
 151
 152     g_free(i);
 153 }
 154
 155 static void free_hw_interface(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, gboolean send_goodbye) {
 156     g_assert(m);
 157     g_assert(hw);
 158
 159     update_hw_interface_rr(m, hw, TRUE);
 160
 161     while (hw->interfaces)
 162         free_interface(m, hw->interfaces, send_goodbye);
 163
 164     AVAHI_LLIST_REMOVE(AvahiHwInterface, hardware, m->hw_interfaces, hw);
 165     g_hash_table_remove(m->hash_table, &hw->index);
 166
 167     g_free(hw->name);
 168     g_free(hw);
 169 }
 170
 171 static AvahiInterfaceAddress* get_address(AvahiInterfaceMonitor *m, AvahiInterface *i, const AvahiAddress *raddr) {
 172     AvahiInterfaceAddress *ia;
 173
 174     g_assert(m);
 175     g_assert(i);
 176     g_assert(raddr);
 177
 178     for (ia = i->addresses; ia; ia = ia->address_next)
 179         if (avahi_address_cmp(&ia->address, raddr) == 0)
 180             return ia;
 181
 182     return NULL;
 183 }
 184
 185 static int netlink_list_items(AvahiNetlink *nl, guint16 type, guint *ret_seq) {
 186     struct nlmsghdr *n;
 187     struct rtgenmsg *gen;
 188     guint8 req[1024];
 189
 190     memset(&req, 0, sizeof(req));
 191     n = (struct nlmsghdr*) req;
 192     n->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg));
 193     n->nlmsg_type = type;
 194     n->nlmsg_flags = NLM_F_ROOT/*|NLM_F_MATCH*/|NLM_F_REQUEST;
 195     n->nlmsg_pid = 0;
 196
 197     gen = NLMSG_DATA(n);
 198     memset(gen, 0, sizeof(struct rtgenmsg));
 199     gen->rtgen_family = AF_UNSPEC;
 200
 201     return avahi_netlink_send(nl, n, ret_seq);
 202 }
 203
 204 static void new_interface(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, guchar protocol) {
 205     AvahiInterface *i;
 206
 207     g_assert(m);
 208     g_assert(hw);
 209     g_assert(protocol != AF_UNSPEC);
 210
 211     i = g_new(AvahiInterface, 1);
 212     i->monitor = m;
 213     i->hardware = hw;
 214     i->protocol = protocol;
 215     i->announcing = FALSE;
 216
 217     AVAHI_LLIST_HEAD_INIT(AvahiInterfaceAddress, i->addresses);
 218     AVAHI_LLIST_HEAD_INIT(AvahiAnnouncement, i->announcements);
 219
 220     i->cache = avahi_cache_new(m->server, i);
 221     i->response_scheduler = avahi_response_scheduler_new(i);
 222     i->query_scheduler = avahi_query_scheduler_new(i);
 223     i->probe_scheduler = avahi_probe_scheduler_new(i);
 224
 225     AVAHI_LLIST_PREPEND(AvahiInterface, by_hardware, hw->interfaces, i);
 226     AVAHI_LLIST_PREPEND(AvahiInterface, interface, m->interfaces, i);
 227 }
 228
 229 static void check_interface_relevant(AvahiInterfaceMonitor *m, AvahiInterface *i) {
 230     gboolean b;
 231
 232     g_assert(m);
 233     g_assert(i);
 234
 235     b = avahi_interface_relevant(i);
 236
 237     if (b && !i->announcing) {
 238         g_message("New relevant interface %s.%i (#%i)", i->hardware->name, i->protocol, i->hardware->index);
 239
 240         if (i->protocol == AF_INET)
 241             avahi_mdns_mcast_join_ipv4(i->hardware->index, m->server->fd_ipv4);
 242         if (i->protocol == AF_INET6)
 243             avahi_mdns_mcast_join_ipv6(i->hardware->index, m->server->fd_ipv6);
 244
 245         i->announcing = TRUE;
 246         avahi_announce_interface(m->server, i);
 247     } else if (!b && i->announcing) {
 248         g_message("Interface %s.%i no longer relevant", i->hardware->name, i->protocol);
 249
 250         if (i->protocol == AF_INET)
 251             avahi_mdns_mcast_leave_ipv4(i->hardware->index, m->server->fd_ipv4);
 252         if (i->protocol == AF_INET6)
 253             avahi_mdns_mcast_leave_ipv6(i->hardware->index, m->server->fd_ipv6);
 254
 255         avahi_goodbye_interface(m->server, i, FALSE);
 256         avahi_response_scheduler_clear(i->response_scheduler);
 257         avahi_query_scheduler_clear(i->query_scheduler);
 258         avahi_probe_scheduler_clear(i->probe_scheduler);
 259         avahi_cache_flush(i->cache);
 260
 261         i->announcing = FALSE;
 262     }
 263 }
 264
 265 static void check_hw_interface_relevant(AvahiInterfaceMonitor *m, AvahiHwInterface *hw) {
 266     AvahiInterface *i;
 267
 268     g_assert(m);
 269     g_assert(hw);
 270
 271     for (i = hw->interfaces; i; i = i->by_hardware_next)
 272         check_interface_relevant(m, i);
 273 }
 274
 275 static void callback(AvahiNetlink *nl, struct nlmsghdr *n, gpointer userdata) {
 276     AvahiInterfaceMonitor *m = userdata;
 277
 278     g_assert(m);
 279     g_assert(n);
 280     g_assert(m->netlink == nl);
 281
 282     if (n->nlmsg_type == RTM_NEWLINK) {
 283         struct ifinfomsg *ifinfomsg = NLMSG_DATA(n);
 284         AvahiHwInterface *hw;
 285         struct rtattr *a = NULL;
 286         size_t l;
 287
 288         if (ifinfomsg->ifi_family != AF_UNSPEC)
 289             return;
 290
 291         if (!(hw = g_hash_table_lookup(m->hash_table, &ifinfomsg->ifi_index))) {
 292             hw = g_new(AvahiHwInterface, 1);
 293             hw->monitor = m;
 294             hw->name = NULL;
 295             hw->flags = 0;
 296             hw->mtu = 1500;
 297             hw->index = ifinfomsg->ifi_index;
 298             hw->mac_address_size = 0;
 299             hw->entry_group = NULL;
 300
 301             AVAHI_LLIST_HEAD_INIT(AvahiInterface, hw->interfaces);
 302             AVAHI_LLIST_PREPEND(AvahiHwInterface, hardware, m->hw_interfaces, hw);
 303
 304             g_hash_table_insert(m->hash_table, &hw->index, hw);
 305
 306             if (m->server->fd_ipv4 >= 0)
 307                 new_interface(m, hw, AF_INET);
 308             if (m->server->fd_ipv6 >= 0)
 309                 new_interface(m, hw, AF_INET6);
 310         }
 311
 312         hw->flags = ifinfomsg->ifi_flags;
 313
 314         l = NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg));
 315         a = IFLA_RTA(ifinfomsg);
 316
 317         while (RTA_OK(a, l)) {
 318             switch(a->rta_type) {
 319                 case IFLA_IFNAME:
 320                     g_free(hw->name);
 321                     hw->name = g_strndup(RTA_DATA(a), RTA_PAYLOAD(a));
 322                     break;
 323
 324                 case IFLA_MTU:
 325                     g_assert(RTA_PAYLOAD(a) == sizeof(unsigned int));
 326                     hw->mtu = *((unsigned int*) RTA_DATA(a));
 327                     break;
 328
 329                 case IFLA_ADDRESS: {
 330                     hw->mac_address_size = RTA_PAYLOAD(a);
 331                     if (hw->mac_address_size > AVAHI_MAX_MAC_ADDRESS)
 332                         hw->mac_address_size = AVAHI_MAX_MAC_ADDRESS;
 333
 334                     memcpy(hw->mac_address, RTA_DATA(a), hw->mac_address_size);
 335                     break;
 336                 }
 337
 338                 default:
 339                     ;
 340             }
 341
 342             a = RTA_NEXT(a, l);
 343         }
 344
 345         update_hw_interface_rr(m, hw, FALSE);
 346         check_hw_interface_relevant(m, hw);
 347
 348     } else if (n->nlmsg_type == RTM_DELLINK) {
 349         struct ifinfomsg *ifinfomsg = NLMSG_DATA(n);
 350         AvahiHwInterface *hw;
 351
 352         if (ifinfomsg->ifi_family != AF_UNSPEC)
 353             return;
 354
 355         if (!(hw = avahi_interface_monitor_get_hw_interface(m, ifinfomsg->ifi_index)))
 356             return;
 357
 358         update_hw_interface_rr(m, hw, TRUE);
 359         free_hw_interface(m, hw, FALSE);
 360
 361     } else if (n->nlmsg_type == RTM_NEWADDR || n->nlmsg_type == RTM_DELADDR) {
 362
 363         struct ifaddrmsg *ifaddrmsg = NLMSG_DATA(n);
 364         AvahiInterface *i;
 365         struct rtattr *a = NULL;
 366         size_t l;
 367         AvahiAddress raddr;
 368         gboolean raddr_valid = FALSE;
 369
 370         if (ifaddrmsg->ifa_family != AF_INET && ifaddrmsg->ifa_family != AF_INET6)
 371             return;
 372
 373         if (!(i = (AvahiInterface*) avahi_interface_monitor_get_interface(m, ifaddrmsg->ifa_index, ifaddrmsg->ifa_family)))
 374             return;
 375
 376         raddr.family = ifaddrmsg->ifa_family;
 377
 378         l = NLMSG_PAYLOAD(n, sizeof(struct ifaddrmsg));
 379         a = IFA_RTA(ifaddrmsg);
 380
 381         while (RTA_OK(a, l)) {
 382
 383             switch(a->rta_type) {
 384                 case IFA_ADDRESS:
 385                     if ((raddr.family == AF_INET6 && RTA_PAYLOAD(a) != 16) ||
 386                         (raddr.family == AF_INET && RTA_PAYLOAD(a) != 4))
 387                         return;
 388
 389                     memcpy(raddr.data.data, RTA_DATA(a), RTA_PAYLOAD(a));
 390                     raddr_valid = TRUE;
 391
 392                     break;
 393
 394                 default:
 395                     ;
 396             }
 397
 398             a = RTA_NEXT(a, l);
 399         }
 400
 401         if (!raddr_valid)
 402             return;
 403
 404         if (n->nlmsg_type == RTM_NEWADDR) {
 405             AvahiInterfaceAddress *addr;
 406
 407             if (!(addr = get_address(m, i, &raddr))) {
 408                 addr = g_new(AvahiInterfaceAddress, 1);
 409                 addr->monitor = m;
 410                 addr->address = raddr;
 411                 addr->interface = i;
 412                 addr->entry_group = NULL;
 413
 414                 AVAHI_LLIST_PREPEND(AvahiInterfaceAddress, address, i->addresses, addr);
 415             }
 416
 417             addr->flags = ifaddrmsg->ifa_flags;
 418             addr->scope = ifaddrmsg->ifa_scope;
 419
 420             update_address_rr(m, addr, FALSE);
 421             check_interface_relevant(m, i);
 422         } else {
 423             AvahiInterfaceAddress *addr;
 424
 425             if (!(addr = get_address(m, i, &raddr)))
 426                 return;
 427
 428             update_address_rr(m, addr, TRUE);
 429             free_address(m, addr);
 430
 431             check_interface_relevant(m, i);
 432         }
 433
 434     } else if (n->nlmsg_type == NLMSG_DONE) {
 435
 436         if (m->list == LIST_IFACE) {
 437             m->list = LIST_DONE;
 438
 439             if (netlink_list_items(m->netlink, RTM_GETADDR, &m->query_addr_seq) < 0)
 440                 g_warning("NETLINK: Failed to list addrs: %s", strerror(errno));
 441             else
 442                 m->list = LIST_ADDR;
 443         } else {
 444             m->list = LIST_DONE;
 445             g_message("Enumeration complete");
 446         }
 447
 448     } else if (n->nlmsg_type == NLMSG_ERROR && (n->nlmsg_seq == m->query_link_seq || n->nlmsg_seq == m->query_addr_seq)) {
 449         struct nlmsgerr *e = NLMSG_DATA (n);
 450
 451         if (e->error)
 452             g_warning("NETLINK: Failed to browse: %s", strerror(-e->error));
 453     }
 454 }
 455
 456 AvahiInterfaceMonitor *avahi_interface_monitor_new(AvahiServer *s) {
 457     AvahiInterfaceMonitor *m = NULL;
 458
 459     m = g_new0(AvahiInterfaceMonitor, 1);
 460     m->server = s;
 461     if (!(m->netlink = avahi_netlink_new(s->context, G_PRIORITY_DEFAULT-10, RTMGRP_LINK|RTMGRP_IPV4_IFADDR|RTMGRP_IPV6_IFADDR, callback, m)))
 462         goto fail;
 463
 464     m->hash_table = g_hash_table_new(g_int_hash, g_int_equal);
 465
 466     AVAHI_LLIST_HEAD_INIT(AvahiInterface, m->interfaces);
 467     AVAHI_LLIST_HEAD_INIT(AvahiHwInterface, m->hw_interfaces);
 468
 469     if (netlink_list_items(m->netlink, RTM_GETLINK, &m->query_link_seq) < 0)
 470         goto fail;
 471
 472     m->list = LIST_IFACE;
 473
 474     return m;
 475
 476 fail:
 477     avahi_interface_monitor_free(m);
 478     return NULL;
 479 }
 480
 481 void avahi_interface_monitor_sync(AvahiInterfaceMonitor *m) {
 482     g_assert(m);
 483
 484     while (m->list != LIST_DONE) {
 485         if (!avahi_netlink_work(m->netlink, TRUE))
 486             break;
 487     }
 488 }
 489
 490 void avahi_interface_monitor_free(AvahiInterfaceMonitor *m) {
 491     g_assert(m);
 492
 493     while (m->hw_interfaces)
 494         free_hw_interface(m, m->hw_interfaces, TRUE);
 495
 496     g_assert(!m->interfaces);
 497
 498
 499     if (m->netlink)
 500         avahi_netlink_free(m->netlink);
 501
 502     if (m->hash_table)
 503         g_hash_table_destroy(m->hash_table);
 504
 505     g_free(m);
 506 }
 507
 508
 509 AvahiInterface* avahi_interface_monitor_get_interface(AvahiInterfaceMonitor *m, gint index, guchar protocol) {
 510     AvahiHwInterface *hw;
 511     AvahiInterface *i;
 512
 513     g_assert(m);
 514     g_assert(index > 0);
 515     g_assert(protocol != AF_UNSPEC);
 516
 517     if (!(hw = avahi_interface_monitor_get_hw_interface(m, index)))
 518         return NULL;
 519
 520     for (i = hw->interfaces; i; i = i->by_hardware_next)
 521         if (i->protocol == protocol)
 522             return i;
 523
 524     return NULL;
 525 }
 526
 527 AvahiHwInterface* avahi_interface_monitor_get_hw_interface(AvahiInterfaceMonitor *m, gint index) {
 528     g_assert(m);
 529     g_assert(index > 0);
 530
 531     return g_hash_table_lookup(m->hash_table, &index);
 532 }
 533
 534
 535 void avahi_interface_send_packet_unicast(AvahiInterface *i, AvahiDnsPacket *p, const AvahiAddress *a, guint16 port) {
 536     g_assert(i);
 537     g_assert(p);
 538 /*     char t[64]; */
 539
 540     if (!avahi_interface_relevant(i))
 541         return;
 542
 543     g_assert(!a || a->family == i->protocol);
 544
 545 /*     if (a) */
 546 /*         g_message("unicast sending on '%s.%i' to %s:%u", i->hardware->name, i->protocol, avahi_address_snprint(t, sizeof(t), a), port); */
 547 /*     else */
 548 /*         g_message("multicast sending on '%s.%i'", i->hardware->name, i->protocol); */
 549
 550     if (i->protocol == AF_INET && i->monitor->server->fd_ipv4 >= 0)
 551         avahi_send_dns_packet_ipv4(i->monitor->server->fd_ipv4, i->hardware->index, p, a ? &a->data.ipv4 : NULL, port);
 552     else if (i->protocol == AF_INET6 && i->monitor->server->fd_ipv6 >= 0)
 553         avahi_send_dns_packet_ipv6(i->monitor->server->fd_ipv6, i->hardware->index, p, a ? &a->data.ipv6 : NULL, port);
 554 }
 555
 556 void avahi_interface_send_packet(AvahiInterface *i, AvahiDnsPacket *p) {
 557     g_assert(i);
 558     g_assert(p);
 559
 560     avahi_interface_send_packet_unicast(i, p, NULL, 0);
 561 }
 562
 563 gboolean avahi_interface_post_query(AvahiInterface *i, AvahiKey *key, gboolean immediately) {
 564     g_assert(i);
 565     g_assert(key);
 566
 567     if (avahi_interface_relevant(i))
 568         return avahi_query_scheduler_post(i->query_scheduler, key, immediately);
 569
 570     return FALSE;
 571 }
 572
 573 gboolean avahi_interface_post_response(AvahiInterface *i, AvahiRecord *record, gboolean flush_cache, const AvahiAddress *querier, gboolean immediately) {
 574     g_assert(i);
 575     g_assert(record);
 576
 577     if (avahi_interface_relevant(i))
 578         return avahi_response_scheduler_post(i->response_scheduler, record, flush_cache, querier, immediately);
 579
 580     return FALSE;
 581 }
 582
 583 gboolean avahi_interface_post_probe(AvahiInterface *i, AvahiRecord *record, gboolean immediately) {
 584     g_assert(i);
 585     g_assert(record);
 586
 587     if (avahi_interface_relevant(i))
 588         return avahi_probe_scheduler_post(i->probe_scheduler, record, immediately);
 589
 590     return FALSE;
 591 }
 592
 593 void avahi_dump_caches(AvahiInterfaceMonitor *m, FILE *f) {
 594     AvahiInterface *i;
 595     g_assert(m);
 596
 597     for (i = m->interfaces; i; i = i->interface_next) {
 598         if (avahi_interface_relevant(i)) {
 599             fprintf(f, "\n;;; INTERFACE %s.%i ;;;\n", i->hardware->name, i->protocol);
 600             avahi_cache_dump(i->cache, f);
 601         }
 602     }
 603     fprintf(f, "\n");
 604 }
 605
 606 gboolean avahi_interface_relevant(AvahiInterface *i) {
 607     AvahiInterfaceAddress *a;
 608     gboolean relevant_address;
 609
 610     g_assert(i);
 611
 612     relevant_address = FALSE;
 613
 614     for (a = i->addresses; a; a = a->address_next)
 615         if (avahi_interface_address_relevant(a)) {
 616             relevant_address = TRUE;
 617             break;
 618         }
 619
 620 /*     g_message("%p. iface-relevant: %i %i %i %i %i %i", i, relevant_address, */
 621 /*               (i->hardware->flags & IFF_UP), */
 622 /*               (i->hardware->flags & IFF_RUNNING), */
 623 /*               !(i->hardware->flags & IFF_LOOPBACK), */
 624 /*               (i->hardware->flags & IFF_MULTICAST), */
 625 /*               !(i->hardware->flags & IFF_POINTOPOINT)); */
 626
 627     return
 628         (i->hardware->flags & IFF_UP) &&
 629         (!i->monitor->server->config.use_iff_running || (i->hardware->flags & IFF_RUNNING)) &&
 630         !(i->hardware->flags & IFF_LOOPBACK) &&
 631         (i->hardware->flags & IFF_MULTICAST) &&
 632         !(i->hardware->flags & IFF_POINTOPOINT) &&
 633         relevant_address;
 634 }
 635
 636 gboolean avahi_interface_address_relevant(AvahiInterfaceAddress *a) {
 637     g_assert(a);
 638
 639     return a->scope == RT_SCOPE_UNIVERSE;
 640 }
 641
 642
 643 gboolean avahi_interface_match(AvahiInterface *i, gint index, guchar protocol) {
 644     g_assert(i);
 645
 646     if (index > 0 && index != i->hardware->index)
 647         return FALSE;
 648
 649     if (protocol != AF_UNSPEC && protocol != i->protocol)
 650         return FALSE;
 651
 652     return TRUE;
 653 }
 654
 655 void avahi_interface_monitor_walk(AvahiInterfaceMonitor *m, gint interface, guchar protocol, AvahiInterfaceMonitorWalkCallback callback, gpointer userdata) {
 656     g_assert(m);
 657     g_assert(callback);
 658
 659     if (interface > 0) {
 660         if (protocol != AF_UNSPEC) {
 661             AvahiInterface *i;
 662
 663             if ((i = avahi_interface_monitor_get_interface(m, interface, protocol)))
 664                 callback(m, i, userdata);
 665
 666         } else {
 667             AvahiHwInterface *hw;
 668             AvahiInterface *i;
 669
 670             if ((hw = avahi_interface_monitor_get_hw_interface(m, interface)))
 671                 for (i = hw->interfaces; i; i = i->by_hardware_next)
 672                     if (avahi_interface_match(i, interface, protocol))
 673                         callback(m, i, userdata);
 674         }
 675
 676     } else {
 677         AvahiInterface *i;
 678
 679         for (i = m->interfaces; i; i = i->interface_next)
 680             if (avahi_interface_match(i, interface, protocol))
 681                 callback(m, i, userdata);
 682     }
 683 }
 684
 685 void avahi_update_host_rrs(AvahiInterfaceMonitor *m, gboolean remove) {
 686     AvahiHwInterface *hw;
 687
 688     g_assert(m);
 689
 690     for (hw = m->hw_interfaces; hw; hw = hw->hardware_next)
 691         update_hw_interface_rr(m, hw, remove);
 692 }
 693
 694 gboolean avahi_address_is_local(AvahiInterfaceMonitor *m, const AvahiAddress *a) {
 695     AvahiInterface *i;
 696     AvahiInterfaceAddress *ia;
 697     g_assert(m);
 698     g_assert(a);
 699
 700     for (i = m->interfaces; i; i = i->interface_next)
 701         for (ia = i->addresses; ia; ia = ia->address_next)
 702             if (avahi_address_cmp(a, &ia->address) == 0)
 703                 return TRUE;
 704
 705     return FALSE;
 706 }