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 #include <stdio.h>
  34
  35 #include "iface.h"
  36 #include "netlink.h"
  37 #include "dns.h"
  38 #include "socket.h"
  39 #include "announce.h"
  40 #include "util.h"
  41 #include "log.h"
  42
  43 static void update_address_rr(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a, gboolean remove_rrs) {
  44     g_assert(m);
  45     g_assert(a);
  46
  47     if (avahi_interface_address_relevant(a) &&
  48         !remove_rrs &&
  49         m->server->config.publish_addresses &&
  50         (m->server->state == AVAHI_SERVER_RUNNING ||
  51         m->server->state == AVAHI_SERVER_REGISTERING)) {
  52
  53         /* Fill the entry group */
  54         if (!a->entry_group)
  55             a->entry_group = avahi_entry_group_new(m->server, avahi_host_rr_entry_group_callback, NULL);
  56
  57         if (avahi_entry_group_is_empty(a->entry_group)) {
  58
  59             if (avahi_server_add_address(m->server, a->entry_group, a->interface->hardware->index, a->interface->protocol, 0, NULL, &a->address) < 0) {
  60                 avahi_log_warn(__FILE__": avahi_server_add_address() failed.");
  61                 avahi_entry_group_free(a->entry_group);
  62                 a->entry_group = NULL;
  63                 return;
  64             }
  65
  66             avahi_entry_group_commit(a->entry_group);
  67         }
  68     } else {
  69
  70         /* Clear the entry group */
  71
  72         if (a->entry_group && !avahi_entry_group_is_empty(a->entry_group)) {
  73
  74             if (avahi_entry_group_get_state(a->entry_group) == AVAHI_ENTRY_GROUP_REGISTERING)
  75                 avahi_server_decrease_host_rr_pending(m->server);
  76
  77             avahi_entry_group_reset(a->entry_group);
  78         }
  79     }
  80 }
  81
  82 static void update_interface_rr(AvahiInterfaceMonitor *m, AvahiInterface *i, gboolean remove_rrs) {
  83     AvahiInterfaceAddress *a;
  84
  85     g_assert(m);
  86     g_assert(i);
  87
  88     for (a = i->addresses; a; a = a->address_next)
  89         update_address_rr(m, a, remove_rrs);
  90 }
  91
  92 static void update_hw_interface_rr(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, gboolean remove_rrs) {
  93     AvahiInterface *i;
  94
  95     g_assert(m);
  96     g_assert(hw);
  97
  98     for (i = hw->interfaces; i; i = i->by_hardware_next)
  99         update_interface_rr(m, i, remove_rrs);
 100
 101     if (!remove_rrs &&
 102         m->server->config.publish_workstation &&
 103         (m->server->state == AVAHI_SERVER_RUNNING ||
 104         m->server->state == AVAHI_SERVER_REGISTERING)) {
 105
 106         if (!hw->entry_group)
 107             hw->entry_group = avahi_entry_group_new(m->server, avahi_host_rr_entry_group_callback, NULL);
 108
 109         if (avahi_entry_group_is_empty(hw->entry_group)) {
 110             gchar *name;
 111             gchar *t = avahi_format_mac_address(hw->mac_address, hw->mac_address_size);
 112
 113             name = g_strdup_printf("%s [%s]", m->server->host_name, t);
 114             g_free(t);
 115
 116             if (avahi_server_add_service(m->server, hw->entry_group, hw->index, AVAHI_PROTO_UNSPEC, name, "_workstation._tcp", NULL, NULL, 9, NULL) < 0) {
 117                 avahi_log_warn(__FILE__": avahi_server_add_service() failed.");
 118                 avahi_entry_group_free(hw->entry_group);
 119                 hw->entry_group = NULL;
 120             } else
 121                 avahi_entry_group_commit(hw->entry_group);
 122
 123             g_free(name);
 124         }
 125
 126     } else {
 127
 128         if (hw->entry_group && !avahi_entry_group_is_empty(hw->entry_group)) {
 129
 130             if (avahi_entry_group_get_state(hw->entry_group) == AVAHI_ENTRY_GROUP_REGISTERING)
 131                 avahi_server_decrease_host_rr_pending(m->server);
 132
 133             avahi_entry_group_reset(hw->entry_group);
 134         }
 135     }
 136 }
 137
 138 static void free_address(AvahiInterfaceMonitor *m, AvahiInterfaceAddress *a) {
 139     g_assert(m);
 140     g_assert(a);
 141     g_assert(a->interface);
 142
 143     update_address_rr(m, a, TRUE);
 144     AVAHI_LLIST_REMOVE(AvahiInterfaceAddress, address, a->interface->addresses, a);
 145
 146     if (a->entry_group)
 147         avahi_entry_group_free(a->entry_group);
 148
 149     g_free(a);
 150 }
 151
 152 static void free_interface(AvahiInterfaceMonitor *m, AvahiInterface *i, gboolean send_goodbye) {
 153     g_assert(m);
 154     g_assert(i);
 155
 156     avahi_goodbye_interface(m->server, i, send_goodbye);
 157     avahi_response_scheduler_force(i->response_scheduler);
 158
 159     g_assert(!i->announcements);
 160
 161     update_interface_rr(m, i, TRUE);
 162
 163     while (i->addresses)
 164         free_address(m, i->addresses);
 165
 166     avahi_response_scheduler_free(i->response_scheduler);
 167     avahi_query_scheduler_free(i->query_scheduler);
 168     avahi_probe_scheduler_free(i->probe_scheduler);
 169     avahi_cache_free(i->cache);
 170
 171     AVAHI_LLIST_REMOVE(AvahiInterface, interface, m->interfaces, i);
 172     AVAHI_LLIST_REMOVE(AvahiInterface, by_hardware, i->hardware->interfaces, i);
 173
 174     g_free(i);
 175 }
 176
 177 static void free_hw_interface(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, gboolean send_goodbye) {
 178     g_assert(m);
 179     g_assert(hw);
 180
 181     update_hw_interface_rr(m, hw, TRUE);
 182
 183     while (hw->interfaces)
 184         free_interface(m, hw->interfaces, send_goodbye);
 185
 186     if (hw->entry_group)
 187         avahi_entry_group_free(hw->entry_group);
 188
 189     AVAHI_LLIST_REMOVE(AvahiHwInterface, hardware, m->hw_interfaces, hw);
 190     g_hash_table_remove(m->hash_table, &hw->index);
 191
 192     g_free(hw->name);
 193     g_free(hw);
 194 }
 195
 196 static AvahiInterfaceAddress* get_address(AvahiInterfaceMonitor *m, AvahiInterface *i, const AvahiAddress *raddr) {
 197     AvahiInterfaceAddress *ia;
 198
 199     g_assert(m);
 200     g_assert(i);
 201     g_assert(raddr);
 202
 203     for (ia = i->addresses; ia; ia = ia->address_next)
 204         if (avahi_address_cmp(&ia->address, raddr) == 0)
 205             return ia;
 206
 207     return NULL;
 208 }
 209
 210 static int netlink_list_items(AvahiNetlink *nl, guint16 type, guint *ret_seq) {
 211     struct nlmsghdr *n;
 212     struct rtgenmsg *gen;
 213     guint8 req[1024];
 214
 215     memset(&req, 0, sizeof(req));
 216     n = (struct nlmsghdr*) req;
 217     n->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg));
 218     n->nlmsg_type = type;
 219     n->nlmsg_flags = NLM_F_ROOT/*|NLM_F_MATCH*/|NLM_F_REQUEST;
 220     n->nlmsg_pid = 0;
 221
 222     gen = NLMSG_DATA(n);
 223     memset(gen, 0, sizeof(struct rtgenmsg));
 224     gen->rtgen_family = AF_UNSPEC;
 225
 226     return avahi_netlink_send(nl, n, ret_seq);
 227 }
 228
 229 static void new_interface(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, AvahiProtocol protocol) {
 230     AvahiInterface *i;
 231
 232     g_assert(m);
 233     g_assert(hw);
 234     g_assert(protocol != AVAHI_PROTO_UNSPEC);
 235
 236     i = g_new(AvahiInterface, 1);
 237     i->monitor = m;
 238     i->hardware = hw;
 239     i->protocol = protocol;
 240     i->announcing = FALSE;
 241
 242     AVAHI_LLIST_HEAD_INIT(AvahiInterfaceAddress, i->addresses);
 243     AVAHI_LLIST_HEAD_INIT(AvahiAnnouncement, i->announcements);
 244
 245     i->cache = avahi_cache_new(m->server, i);
 246     i->response_scheduler = avahi_response_scheduler_new(i);
 247     i->query_scheduler = avahi_query_scheduler_new(i);
 248     i->probe_scheduler = avahi_probe_scheduler_new(i);
 249
 250     AVAHI_LLIST_PREPEND(AvahiInterface, by_hardware, hw->interfaces, i);
 251     AVAHI_LLIST_PREPEND(AvahiInterface, interface, m->interfaces, i);
 252 }
 253
 254 static void check_interface_relevant(AvahiInterfaceMonitor *m, AvahiInterface *i) {
 255     gboolean b;
 256
 257     g_assert(m);
 258     g_assert(i);
 259
 260     b = avahi_interface_relevant(i);
 261
 262     if (b && !i->announcing) {
 263         avahi_log_debug("New relevant interface %s.%i (#%i)", i->hardware->name, i->protocol, i->hardware->index);
 264
 265         if (i->protocol == AVAHI_PROTO_INET)
 266             avahi_mdns_mcast_join_ipv4(m->server->fd_ipv4, i->hardware->index);
 267         if (i->protocol == AVAHI_PROTO_INET6)
 268             avahi_mdns_mcast_join_ipv6(m->server->fd_ipv6, i->hardware->index);
 269
 270         i->announcing = TRUE;
 271         avahi_announce_interface(m->server, i);
 272         avahi_browser_new_interface(m->server, i);
 273     } else if (!b && i->announcing) {
 274         avahi_log_debug("Interface %s.%i no longer relevant", i->hardware->name, i->protocol);
 275
 276         if (i->protocol == AVAHI_PROTO_INET)
 277             avahi_mdns_mcast_leave_ipv4(m->server->fd_ipv4, i->hardware->index);
 278         if (i->protocol == AVAHI_PROTO_INET6)
 279             avahi_mdns_mcast_leave_ipv6(m->server->fd_ipv6, i->hardware->index);
 280
 281         avahi_goodbye_interface(m->server, i, FALSE);
 282         avahi_response_scheduler_clear(i->response_scheduler);
 283         avahi_query_scheduler_clear(i->query_scheduler);
 284         avahi_probe_scheduler_clear(i->probe_scheduler);
 285         avahi_cache_flush(i->cache);
 286
 287         i->announcing = FALSE;
 288     }
 289 }
 290
 291 static void check_hw_interface_relevant(AvahiInterfaceMonitor *m, AvahiHwInterface *hw) {
 292     AvahiInterface *i;
 293
 294     g_assert(m);
 295     g_assert(hw);
 296
 297     for (i = hw->interfaces; i; i = i->by_hardware_next)
 298         check_interface_relevant(m, i);
 299 }
 300
 301 static void netlink_callback(AvahiNetlink *nl, struct nlmsghdr *n, gpointer userdata) {
 302     AvahiInterfaceMonitor *m = userdata;
 303
 304     g_assert(m);
 305     g_assert(n);
 306     g_assert(m->netlink == nl);
 307
 308     if (n->nlmsg_type == RTM_NEWLINK) {
 309         struct ifinfomsg *ifinfomsg = NLMSG_DATA(n);
 310         AvahiHwInterface *hw;
 311         struct rtattr *a = NULL;
 312         size_t l;
 313
 314         if (ifinfomsg->ifi_family != AF_UNSPEC)
 315             return;
 316
 317         if (!(hw = g_hash_table_lookup(m->hash_table, &ifinfomsg->ifi_index))) {
 318             hw = g_new(AvahiHwInterface, 1);
 319             hw->monitor = m;
 320             hw->name = NULL;
 321             hw->flags = 0;
 322             hw->mtu = 1500;
 323             hw->index = (AvahiIfIndex) ifinfomsg->ifi_index;
 324             hw->mac_address_size = 0;
 325             hw->entry_group = NULL;
 326
 327             AVAHI_LLIST_HEAD_INIT(AvahiInterface, hw->interfaces);
 328             AVAHI_LLIST_PREPEND(AvahiHwInterface, hardware, m->hw_interfaces, hw);
 329
 330             g_hash_table_insert(m->hash_table, &hw->index, hw);
 331
 332             if (m->server->fd_ipv4 >= 0)
 333                 new_interface(m, hw, AVAHI_PROTO_INET);
 334             if (m->server->fd_ipv6 >= 0)
 335                 new_interface(m, hw, AVAHI_PROTO_INET6);
 336         }
 337
 338         hw->flags = ifinfomsg->ifi_flags;
 339
 340         l = NLMSG_PAYLOAD(n, sizeof(struct ifinfomsg));
 341         a = IFLA_RTA(ifinfomsg);
 342
 343         while (RTA_OK(a, l)) {
 344             switch(a->rta_type) {
 345                 case IFLA_IFNAME:
 346                     g_free(hw->name);
 347                     hw->name = g_strndup(RTA_DATA(a), RTA_PAYLOAD(a));
 348                     break;
 349
 350                 case IFLA_MTU:
 351                     g_assert(RTA_PAYLOAD(a) == sizeof(unsigned int));
 352                     hw->mtu = *((unsigned int*) RTA_DATA(a));
 353                     break;
 354
 355                 case IFLA_ADDRESS: {
 356                     hw->mac_address_size = RTA_PAYLOAD(a);
 357                     if (hw->mac_address_size > AVAHI_MAX_MAC_ADDRESS)
 358                         hw->mac_address_size = AVAHI_MAX_MAC_ADDRESS;
 359
 360                     memcpy(hw->mac_address, RTA_DATA(a), hw->mac_address_size);
 361                     break;
 362                 }
 363
 364                 default:
 365                     ;
 366             }
 367
 368             a = RTA_NEXT(a, l);
 369         }
 370
 371         update_hw_interface_rr(m, hw, FALSE);
 372         check_hw_interface_relevant(m, hw);
 373
 374     } else if (n->nlmsg_type == RTM_DELLINK) {
 375         struct ifinfomsg *ifinfomsg = NLMSG_DATA(n);
 376         AvahiHwInterface *hw;
 377
 378         if (ifinfomsg->ifi_family != AF_UNSPEC)
 379             return;
 380
 381         if (!(hw = avahi_interface_monitor_get_hw_interface(m, (AvahiIfIndex) ifinfomsg->ifi_index)))
 382             return;
 383
 384         update_hw_interface_rr(m, hw, TRUE);
 385         free_hw_interface(m, hw, FALSE);
 386
 387     } else if (n->nlmsg_type == RTM_NEWADDR || n->nlmsg_type == RTM_DELADDR) {
 388
 389         struct ifaddrmsg *ifaddrmsg = NLMSG_DATA(n);
 390         AvahiInterface *i;
 391         struct rtattr *a = NULL;
 392         size_t l;
 393         AvahiAddress raddr;
 394         gboolean raddr_valid = FALSE;
 395
 396         if (ifaddrmsg->ifa_family != AVAHI_PROTO_INET && ifaddrmsg->ifa_family != AVAHI_PROTO_INET6)
 397             return;
 398
 399         if (!(i = (AvahiInterface*) avahi_interface_monitor_get_interface(m, (AvahiIfIndex) ifaddrmsg->ifa_index, (AvahiProtocol) ifaddrmsg->ifa_family)))
 400             return;
 401
 402         raddr.family = (AvahiProtocol) ifaddrmsg->ifa_family;
 403
 404         l = NLMSG_PAYLOAD(n, sizeof(struct ifaddrmsg));
 405         a = IFA_RTA(ifaddrmsg);
 406
 407         while (RTA_OK(a, l)) {
 408
 409             switch(a->rta_type) {
 410                 case IFA_ADDRESS:
 411                     if ((raddr.family == AVAHI_PROTO_INET6 && RTA_PAYLOAD(a) != 16) ||
 412                         (raddr.family == AVAHI_PROTO_INET && RTA_PAYLOAD(a) != 4))
 413                         return;
 414
 415                     memcpy(raddr.data.data, RTA_DATA(a), RTA_PAYLOAD(a));
 416                     raddr_valid = TRUE;
 417
 418                     break;
 419
 420                 default:
 421                     ;
 422             }
 423
 424             a = RTA_NEXT(a, l);
 425         }
 426
 427         if (!raddr_valid)
 428             return;
 429
 430         if (n->nlmsg_type == RTM_NEWADDR) {
 431             AvahiInterfaceAddress *addr;
 432
 433             if (!(addr = get_address(m, i, &raddr))) {
 434                 addr = g_new(AvahiInterfaceAddress, 1);
 435                 addr->monitor = m;
 436                 addr->address = raddr;
 437                 addr->interface = i;
 438                 addr->entry_group = NULL;
 439
 440                 AVAHI_LLIST_PREPEND(AvahiInterfaceAddress, address, i->addresses, addr);
 441             }
 442
 443             addr->flags = ifaddrmsg->ifa_flags;
 444             addr->scope = ifaddrmsg->ifa_scope;
 445             addr->prefix_len = ifaddrmsg->ifa_prefixlen;
 446
 447             update_address_rr(m, addr, FALSE);
 448         } else {
 449             AvahiInterfaceAddress *addr;
 450
 451             if (!(addr = get_address(m, i, &raddr)))
 452                 return;
 453
 454             update_address_rr(m, addr, TRUE);
 455             free_address(m, addr);
 456         }
 457
 458         check_interface_relevant(m, i);
 459
 460     } else if (n->nlmsg_type == NLMSG_DONE) {
 461
 462         if (m->list == LIST_IFACE) {
 463             m->list = LIST_DONE;
 464
 465             if (netlink_list_items(m->netlink, RTM_GETADDR, &m->query_addr_seq) < 0)
 466                 avahi_log_warn("NETLINK: Failed to list addrs: %s", strerror(errno));
 467             else
 468                 m->list = LIST_ADDR;
 469         } else {
 470             m->list = LIST_DONE;
 471             avahi_log_debug("Enumeration complete");
 472         }
 473
 474     } else if (n->nlmsg_type == NLMSG_ERROR && (n->nlmsg_seq == m->query_link_seq || n->nlmsg_seq == m->query_addr_seq)) {
 475         struct nlmsgerr *e = NLMSG_DATA (n);
 476
 477         if (e->error)
 478             avahi_log_warn("NETLINK: Failed to browse: %s", strerror(-e->error));
 479     }
 480 }
 481
 482 AvahiInterfaceMonitor *avahi_interface_monitor_new(AvahiServer *s) {
 483     AvahiInterfaceMonitor *m = NULL;
 484
 485     m = g_new0(AvahiInterfaceMonitor, 1);
 486     m->server = s;
 487     if (!(m->netlink = avahi_netlink_new(s->context, G_PRIORITY_DEFAULT-10, RTMGRP_LINK|RTMGRP_IPV4_IFADDR|RTMGRP_IPV6_IFADDR, netlink_callback, m)))
 488         goto fail;
 489
 490     m->hash_table = g_hash_table_new(g_int_hash, g_int_equal);
 491
 492     AVAHI_LLIST_HEAD_INIT(AvahiInterface, m->interfaces);
 493     AVAHI_LLIST_HEAD_INIT(AvahiHwInterface, m->hw_interfaces);
 494
 495     if (netlink_list_items(m->netlink, RTM_GETLINK, &m->query_link_seq) < 0)
 496         goto fail;
 497
 498     m->list = LIST_IFACE;
 499
 500     return m;
 501
 502 fail:
 503     avahi_interface_monitor_free(m);
 504     return NULL;
 505 }
 506
 507 void avahi_interface_monitor_sync(AvahiInterfaceMonitor *m) {
 508     g_assert(m);
 509
 510     while (m->list != LIST_DONE) {
 511         if (!avahi_netlink_work(m->netlink, TRUE))
 512             break;
 513     }
 514 }
 515
 516 void avahi_interface_monitor_free(AvahiInterfaceMonitor *m) {
 517     g_assert(m);
 518
 519     while (m->hw_interfaces)
 520         free_hw_interface(m, m->hw_interfaces, TRUE);
 521
 522     g_assert(!m->interfaces);
 523
 524
 525     if (m->netlink)
 526         avahi_netlink_free(m->netlink);
 527
 528     if (m->hash_table)
 529         g_hash_table_destroy(m->hash_table);
 530
 531     g_free(m);
 532 }
 533
 534
 535 AvahiInterface* avahi_interface_monitor_get_interface(AvahiInterfaceMonitor *m, AvahiIfIndex idx, AvahiProtocol protocol) {
 536     AvahiHwInterface *hw;
 537     AvahiInterface *i;
 538
 539     g_assert(m);
 540     g_assert(idx > 0);
 541     g_assert(protocol != AVAHI_PROTO_UNSPEC);
 542
 543     if (!(hw = avahi_interface_monitor_get_hw_interface(m, idx)))
 544         return NULL;
 545
 546     for (i = hw->interfaces; i; i = i->by_hardware_next)
 547         if (i->protocol == protocol)
 548             return i;
 549
 550     return NULL;
 551 }
 552
 553 AvahiHwInterface* avahi_interface_monitor_get_hw_interface(AvahiInterfaceMonitor *m, AvahiIfIndex idx) {
 554     g_assert(m);
 555     g_assert(idx > 0);
 556
 557     return g_hash_table_lookup(m->hash_table, &idx);
 558 }
 559
 560
 561 void avahi_interface_send_packet_unicast(AvahiInterface *i, AvahiDnsPacket *p, const AvahiAddress *a, guint16 port) {
 562     g_assert(i);
 563     g_assert(p);
 564 /*     char t[64]; */
 565
 566     if (!avahi_interface_relevant(i))
 567         return;
 568
 569     g_assert(!a || a->family == i->protocol);
 570
 571 /*     if (a) */
 572 /*         avahi_log_debug("unicast sending on '%s.%i' to %s:%u", i->hardware->name, i->protocol, avahi_address_snprint(t, sizeof(t), a), port); */
 573 /*     else */
 574 /*         avahi_log_debug("multicast sending on '%s.%i'", i->hardware->name, i->protocol); */
 575
 576     if (i->protocol == AVAHI_PROTO_INET && i->monitor->server->fd_ipv4 >= 0)
 577         avahi_send_dns_packet_ipv4(i->monitor->server->fd_ipv4, i->hardware->index, p, a ? &a->data.ipv4 : NULL, port);
 578     else if (i->protocol == AVAHI_PROTO_INET6 && i->monitor->server->fd_ipv6 >= 0)
 579         avahi_send_dns_packet_ipv6(i->monitor->server->fd_ipv6, i->hardware->index, p, a ? &a->data.ipv6 : NULL, port);
 580 }
 581
 582 void avahi_interface_send_packet(AvahiInterface *i, AvahiDnsPacket *p) {
 583     g_assert(i);
 584     g_assert(p);
 585
 586     avahi_interface_send_packet_unicast(i, p, NULL, 0);
 587 }
 588
 589 gboolean avahi_interface_post_query(AvahiInterface *i, AvahiKey *key, gboolean immediately) {
 590     g_assert(i);
 591     g_assert(key);
 592
 593     if (avahi_interface_relevant(i))
 594         return avahi_query_scheduler_post(i->query_scheduler, key, immediately);
 595
 596     return FALSE;
 597 }
 598
 599 gboolean avahi_interface_post_response(AvahiInterface *i, AvahiRecord *record, gboolean flush_cache, const AvahiAddress *querier, gboolean immediately) {
 600     g_assert(i);
 601     g_assert(record);
 602
 603     if (avahi_interface_relevant(i))
 604         return avahi_response_scheduler_post(i->response_scheduler, record, flush_cache, querier, immediately);
 605
 606     return FALSE;
 607 }
 608
 609 gboolean avahi_interface_post_probe(AvahiInterface *i, AvahiRecord *record, gboolean immediately) {
 610     g_assert(i);
 611     g_assert(record);
 612
 613     if (avahi_interface_relevant(i))
 614         return avahi_probe_scheduler_post(i->probe_scheduler, record, immediately);
 615
 616     return FALSE;
 617 }
 618
 619 void avahi_dump_caches(AvahiInterfaceMonitor *m, AvahiDumpCallback callback, gpointer userdata) {
 620     AvahiInterface *i;
 621     g_assert(m);
 622
 623     for (i = m->interfaces; i; i = i->interface_next) {
 624         if (avahi_interface_relevant(i)) {
 625             char ln[256];
 626             snprintf(ln, sizeof(ln), ";;; INTERFACE %s.%i ;;;", i->hardware->name, i->protocol);
 627             callback(ln, userdata);
 628             avahi_cache_dump(i->cache, callback, userdata);
 629         }
 630     }
 631 }
 632
 633 gboolean avahi_interface_relevant(AvahiInterface *i) {
 634     AvahiInterfaceAddress *a;
 635     gboolean relevant_address;
 636
 637     g_assert(i);
 638
 639     relevant_address = FALSE;
 640
 641     for (a = i->addresses; a; a = a->address_next)
 642         if (avahi_interface_address_relevant(a)) {
 643             relevant_address = TRUE;
 644             break;
 645         }
 646
 647 /*     avahi_log_debug("%p. iface-relevant: %i %i %i %i %i %i", i, relevant_address, */
 648 /*               (i->hardware->flags & IFF_UP), */
 649 /*               (i->hardware->flags & IFF_RUNNING), */
 650 /*               !(i->hardware->flags & IFF_LOOPBACK), */
 651 /*               (i->hardware->flags & IFF_MULTICAST), */
 652 /*               !(i->hardware->flags & IFF_POINTOPOINT)); */
 653
 654     return
 655         (i->hardware->flags & IFF_UP) &&
 656         (!i->monitor->server->config.use_iff_running || (i->hardware->flags & IFF_RUNNING)) &&
 657         !(i->hardware->flags & IFF_LOOPBACK) &&
 658         (i->hardware->flags & IFF_MULTICAST) &&
 659         !(i->hardware->flags & IFF_POINTOPOINT) &&
 660         relevant_address;
 661 }
 662
 663 gboolean avahi_interface_address_relevant(AvahiInterfaceAddress *a) {
 664     g_assert(a);
 665
 666     return a->scope == RT_SCOPE_UNIVERSE;
 667 }
 668
 669
 670 gboolean avahi_interface_match(AvahiInterface *i, AvahiIfIndex idx, AvahiProtocol protocol) {
 671     g_assert(i);
 672
 673     if (idx > 0 && idx != i->hardware->index)
 674         return FALSE;
 675
 676     if (protocol != AVAHI_PROTO_UNSPEC && protocol != i->protocol)
 677         return FALSE;
 678
 679     return TRUE;
 680 }
 681
 682 void avahi_interface_monitor_walk(AvahiInterfaceMonitor *m, AvahiIfIndex interface, AvahiProtocol protocol, AvahiInterfaceMonitorWalkCallback callback, gpointer userdata) {
 683     g_assert(m);
 684     g_assert(callback);
 685
 686     if (interface > 0) {
 687         if (protocol != AVAHI_PROTO_UNSPEC) {
 688             AvahiInterface *i;
 689
 690             if ((i = avahi_interface_monitor_get_interface(m, interface, protocol)))
 691                 callback(m, i, userdata);
 692
 693         } else {
 694             AvahiHwInterface *hw;
 695             AvahiInterface *i;
 696
 697             if ((hw = avahi_interface_monitor_get_hw_interface(m, interface)))
 698                 for (i = hw->interfaces; i; i = i->by_hardware_next)
 699                     if (avahi_interface_match(i, interface, protocol))
 700                         callback(m, i, userdata);
 701         }
 702
 703     } else {
 704         AvahiInterface *i;
 705
 706         for (i = m->interfaces; i; i = i->interface_next)
 707             if (avahi_interface_match(i, interface, protocol))
 708                 callback(m, i, userdata);
 709     }
 710 }
 711
 712 void avahi_update_host_rrs(AvahiInterfaceMonitor *m, gboolean remove_rrs) {
 713     AvahiHwInterface *hw;
 714
 715     g_assert(m);
 716
 717     for (hw = m->hw_interfaces; hw; hw = hw->hardware_next)
 718         update_hw_interface_rr(m, hw, remove_rrs);
 719 }
 720
 721 gboolean avahi_address_is_local(AvahiInterfaceMonitor *m, const AvahiAddress *a) {
 722     AvahiInterface *i;
 723     AvahiInterfaceAddress *ia;
 724     g_assert(m);
 725     g_assert(a);
 726
 727     for (i = m->interfaces; i; i = i->interface_next)
 728         for (ia = i->addresses; ia; ia = ia->address_next)
 729             if (avahi_address_cmp(a, &ia->address) == 0)
 730                 return TRUE;
 731
 732     return FALSE;
 733 }
 734
 735 gboolean avahi_interface_address_on_link(AvahiInterface *i, const AvahiAddress *a) {
 736     AvahiInterfaceAddress *ia;
 737
 738     g_assert(i);
 739     g_assert(a);
 740
 741     if (a->family != i->protocol)
 742         return FALSE;
 743
 744     for (ia = i->addresses; ia; ia = ia->address_next) {
 745
 746         if (a->family == AVAHI_PROTO_INET) {
 747             guint32 m;
 748
 749             m = ~(((guint32) -1) >> ia->prefix_len);
 750
 751             if ((g_ntohl(a->data.ipv4.address) & m) == (g_ntohl(ia->address.data.ipv4.address) & m))
 752                 return TRUE;
 753         } else {
 754             guint j;
 755             guchar pl;
 756             g_assert(a->family == AVAHI_PROTO_INET6);
 757
 758             pl = ia->prefix_len;
 759
 760             for (j = 0; j < 16; j++) {
 761                 guint8 m;
 762
 763                 if (pl == 0)
 764                     return TRUE;
 765
 766                 if (pl >= 8) {
 767                     m = 0xFF;
 768                     pl -= 8;
 769                 } else {
 770                     m = ~(0xFF >> pl);
 771                     pl = 0;
 772                 }
 773
 774                 if ((a->data.ipv6.address[j] & m) != (ia->address.data.ipv6.address[j] & m))
 775                     break;
 776             }
 777         }
 778     }
 779
 780     return FALSE;
 781 }