diff options
Diffstat (limited to 'trunk/avahi-core/iface.c')
| -rw-r--r-- | trunk/avahi-core/iface.c | 812 |
1 files changed, 0 insertions, 812 deletions
diff --git a/trunk/avahi-core/iface.c b/trunk/avahi-core/iface.c deleted file mode 100644 index 5685618..0000000 --- a/trunk/avahi-core/iface.c +++ /dev/null @@ -1,812 +0,0 @@ -/* $Id$ */ - -/*** - This file is part of avahi. - - avahi is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as - published by the Free Software Foundation; either version 2.1 of the - License, or (at your option) any later version. - - avahi is distributed in the hope that it will be useful, but WITHOUT - ANY WARRANTY; without even the implied warranty of MERCHANTABILITY - or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General - Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with avahi; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 - USA. -***/ - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include <string.h> -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include <sys/types.h> -#include <sys/socket.h> -#include <netinet/in.h> - -#include <avahi-common/error.h> -#include <avahi-common/malloc.h> -#include <avahi-common/domain.h> - -#include "iface.h" -#include "dns.h" -#include "socket.h" -#include "announce.h" -#include "util.h" -#include "log.h" -#include "multicast-lookup.h" -#include "querier.h" - -void avahi_interface_address_update_rrs(AvahiInterfaceAddress *a, int remove_rrs) { - AvahiInterfaceMonitor *m; - - assert(a); - m = a->monitor; - - if (a->interface->announcing && - m->list_complete && - avahi_interface_address_is_relevant(a) && - !remove_rrs && - m->server->config.publish_addresses && - (m->server->state == AVAHI_SERVER_RUNNING || - m->server->state == AVAHI_SERVER_REGISTERING)) { - - /* Fill the entry group */ - if (!a->entry_group) - a->entry_group = avahi_s_entry_group_new(m->server, avahi_host_rr_entry_group_callback, NULL); - - if (!a->entry_group) /* OOM */ - return; - - if (avahi_s_entry_group_is_empty(a->entry_group)) { - char t[AVAHI_ADDRESS_STR_MAX]; - avahi_address_snprint(t, sizeof(t), &a->address); - - avahi_log_info("Registering new address record for %s on %s.", t, a->interface->hardware->name); - - if (avahi_server_add_address(m->server, a->entry_group, a->interface->hardware->index, a->interface->protocol, 0, NULL, &a->address) < 0) { - avahi_log_warn(__FILE__": avahi_server_add_address() failed: %s", avahi_strerror(m->server->error)); - avahi_s_entry_group_free(a->entry_group); - a->entry_group = NULL; - return; - } - - avahi_s_entry_group_commit(a->entry_group); - } - } else { - - /* Clear the entry group */ - - if (a->entry_group && !avahi_s_entry_group_is_empty(a->entry_group)) { - char t[AVAHI_ADDRESS_STR_MAX]; - avahi_address_snprint(t, sizeof(t), &a->address); - - if (avahi_s_entry_group_get_state(a->entry_group) == AVAHI_ENTRY_GROUP_REGISTERING && - m->server->state == AVAHI_SERVER_REGISTERING) - avahi_server_decrease_host_rr_pending(m->server); - - avahi_log_info("Withdrawing address record for %s on %s.", t, a->interface->hardware->name); - - avahi_s_entry_group_reset(a->entry_group); - } - } -} - -void avahi_interface_update_rrs(AvahiInterface *i, int remove_rrs) { - AvahiInterfaceAddress *a; - - assert(i); - - for (a = i->addresses; a; a = a->address_next) - avahi_interface_address_update_rrs(a, remove_rrs); -} - -void avahi_hw_interface_update_rrs(AvahiHwInterface *hw, int remove_rrs) { - AvahiInterface *i; - AvahiInterfaceMonitor *m; - - assert(hw); - m = hw->monitor; - - for (i = hw->interfaces; i; i = i->by_hardware_next) - avahi_interface_update_rrs(i, remove_rrs); - - if (m->list_complete && - !remove_rrs && - m->server->config.publish_workstation && - (m->server->state == AVAHI_SERVER_RUNNING)) { - - if (!hw->entry_group) - hw->entry_group = avahi_s_entry_group_new(m->server, avahi_host_rr_entry_group_callback, NULL); - - if (!hw->entry_group) - return; /* OOM */ - - if (avahi_s_entry_group_is_empty(hw->entry_group)) { - char name[AVAHI_LABEL_MAX], mac[256]; - - avahi_format_mac_address(mac, sizeof(mac), hw->mac_address, hw->mac_address_size); - snprintf(name, sizeof(name), "%s [%s]", m->server->host_name, mac); - - if (avahi_server_add_service(m->server, hw->entry_group, hw->index, AVAHI_PROTO_UNSPEC, 0, name, "_workstation._tcp", NULL, NULL, 9, NULL) < 0) { - avahi_log_warn(__FILE__": avahi_server_add_service() failed: %s", avahi_strerror(m->server->error)); - avahi_s_entry_group_free(hw->entry_group); - hw->entry_group = NULL; - } else - avahi_s_entry_group_commit(hw->entry_group); - } - - } else { - - if (hw->entry_group && !avahi_s_entry_group_is_empty(hw->entry_group)) { - - if (avahi_s_entry_group_get_state(hw->entry_group) == AVAHI_ENTRY_GROUP_REGISTERING) - avahi_server_decrease_host_rr_pending(m->server); - - avahi_s_entry_group_reset(hw->entry_group); - } - } -} - -void avahi_interface_monitor_update_rrs(AvahiInterfaceMonitor *m, int remove_rrs) { - AvahiHwInterface *hw; - - assert(m); - - for (hw = m->hw_interfaces; hw; hw = hw->hardware_next) - avahi_hw_interface_update_rrs(hw, remove_rrs); -} - -static int interface_mdns_mcast_join(AvahiInterface *i, int join) { - char at[AVAHI_ADDRESS_STR_MAX]; - int r; - assert(i); - - if (!!join == !!i->mcast_joined) - return 0; - - if (join) { - AvahiInterfaceAddress *a; - - /* Look if there's an address with global scope */ - for (a = i->addresses; a; a = a->address_next) - if (a->global_scope) - break; - - /* No address with a global scope has been found, so let's use - * any. */ - if (!a) - a = i->addresses; - - /* Hmm, there is no address available. */ - if (!a) { - avahi_log_warn(__FILE__": interface_mdns_mcast_join() called but no local address available."); - return -1; - } - - i->local_mcast_address = a->address; - } - - avahi_log_info("%s mDNS multicast group on interface %s.%s with address %s.", - join ? "Joining" : "Leaving", - i->hardware->name, - avahi_proto_to_string(i->protocol), - avahi_address_snprint(at, sizeof(at), &i->local_mcast_address)); - - if (i->protocol == AVAHI_PROTO_INET6) - r = avahi_mdns_mcast_join_ipv6(i->monitor->server->fd_ipv6, &i->local_mcast_address.data.ipv6, i->hardware->index, join); - else { - assert(i->protocol == AVAHI_PROTO_INET); - - r = avahi_mdns_mcast_join_ipv4(i->monitor->server->fd_ipv4, &i->local_mcast_address.data.ipv4, i->hardware->index, join); - } - - if (r < 0) - i->mcast_joined = 0; - else - i->mcast_joined = join; - - return 0; -} - -static int interface_mdns_mcast_rejoin(AvahiInterface *i) { - AvahiInterfaceAddress *a, *usable = NULL, *found = NULL; - assert(i); - - if (!i->mcast_joined) - return 0; - - /* Check whether old address we joined with is still available. If - * not, rejoin using an other address. */ - - for (a = i->addresses; a; a = a->address_next) { - if (a->global_scope && !usable) - usable = a; - - if (avahi_address_cmp(&a->address, &i->local_mcast_address) == 0) { - - if (a->global_scope) - /* No action necessary: the address still exists and - * has global scope. */ - return 0; - - found = a; - } - } - - if (found && !usable) - /* No action necessary: the address still exists and no better one has been found */ - return 0; - - interface_mdns_mcast_join(i, 0); - return interface_mdns_mcast_join(i, 1); -} - -void avahi_interface_address_free(AvahiInterfaceAddress *a) { - assert(a); - assert(a->interface); - - avahi_interface_address_update_rrs(a, 1); - AVAHI_LLIST_REMOVE(AvahiInterfaceAddress, address, a->interface->addresses, a); - - if (a->entry_group) - avahi_s_entry_group_free(a->entry_group); - - interface_mdns_mcast_rejoin(a->interface); - - avahi_free(a); -} - -void avahi_interface_free(AvahiInterface *i, int send_goodbye) { - assert(i); - - /* Handle goodbyes and remove announcers */ - avahi_goodbye_interface(i->monitor->server, i, send_goodbye, 1); - avahi_response_scheduler_force(i->response_scheduler); - assert(!i->announcers); - - if (i->mcast_joined) - interface_mdns_mcast_join(i, 0); - - /* Remove queriers */ - avahi_querier_free_all(i); - avahi_hashmap_free(i->queriers_by_key); - - /* Remove local RRs */ - avahi_interface_update_rrs(i, 1); - - while (i->addresses) - avahi_interface_address_free(i->addresses); - - avahi_response_scheduler_free(i->response_scheduler); - avahi_query_scheduler_free(i->query_scheduler); - avahi_probe_scheduler_free(i->probe_scheduler); - avahi_cache_free(i->cache); - - AVAHI_LLIST_REMOVE(AvahiInterface, interface, i->monitor->interfaces, i); - AVAHI_LLIST_REMOVE(AvahiInterface, by_hardware, i->hardware->interfaces, i); - - avahi_free(i); -} - -void avahi_hw_interface_free(AvahiHwInterface *hw, int send_goodbye) { - assert(hw); - - avahi_hw_interface_update_rrs(hw, 1); - - while (hw->interfaces) - avahi_interface_free(hw->interfaces, send_goodbye); - - if (hw->entry_group) - avahi_s_entry_group_free(hw->entry_group); - - AVAHI_LLIST_REMOVE(AvahiHwInterface, hardware, hw->monitor->hw_interfaces, hw); - avahi_hashmap_remove(hw->monitor->hashmap, &hw->index); - - avahi_free(hw->name); - avahi_free(hw); -} - -AvahiInterface* avahi_interface_new(AvahiInterfaceMonitor *m, AvahiHwInterface *hw, AvahiProtocol protocol) { - AvahiInterface *i; - - assert(m); - assert(hw); - assert(AVAHI_PROTO_VALID(protocol)); - - if (!(i = avahi_new(AvahiInterface, 1))) - goto fail; /* OOM */ - - i->monitor = m; - i->hardware = hw; - i->protocol = protocol; - i->announcing = 0; - i->mcast_joined = 0; - - AVAHI_LLIST_HEAD_INIT(AvahiInterfaceAddress, i->addresses); - AVAHI_LLIST_HEAD_INIT(AvahiAnnouncer, i->announcers); - - AVAHI_LLIST_HEAD_INIT(AvahiQuerier, i->queriers); - i->queriers_by_key = avahi_hashmap_new((AvahiHashFunc) avahi_key_hash, (AvahiEqualFunc) avahi_key_equal, NULL, NULL); - - i->cache = avahi_cache_new(m->server, i); - i->response_scheduler = avahi_response_scheduler_new(i); - i->query_scheduler = avahi_query_scheduler_new(i); - i->probe_scheduler = avahi_probe_scheduler_new(i); - - if (!i->cache || !i->response_scheduler || !i->query_scheduler || !i->probe_scheduler) - goto fail; /* OOM */ - - AVAHI_LLIST_PREPEND(AvahiInterface, by_hardware, hw->interfaces, i); - AVAHI_LLIST_PREPEND(AvahiInterface, interface, m->interfaces, i); - - return i; - -fail: - - if (i) { - if (i->cache) - avahi_cache_free(i->cache); - if (i->response_scheduler) - avahi_response_scheduler_free(i->response_scheduler); - if (i->query_scheduler) - avahi_query_scheduler_free(i->query_scheduler); - if (i->probe_scheduler) - avahi_probe_scheduler_free(i->probe_scheduler); - } - - return NULL; -} - -AvahiHwInterface *avahi_hw_interface_new(AvahiInterfaceMonitor *m, AvahiIfIndex idx) { - AvahiHwInterface *hw; - - assert(m); - assert(AVAHI_IF_VALID(idx)); - - if (!(hw = avahi_new(AvahiHwInterface, 1))) - return NULL; - - hw->monitor = m; - hw->name = NULL; - hw->flags_ok = 0; - hw->mtu = 1500; - hw->index = idx; - hw->mac_address_size = 0; - hw->entry_group = NULL; - - AVAHI_LLIST_HEAD_INIT(AvahiInterface, hw->interfaces); - AVAHI_LLIST_PREPEND(AvahiHwInterface, hardware, m->hw_interfaces, hw); - - avahi_hashmap_insert(m->hashmap, &hw->index, hw); - - if (m->server->fd_ipv4 >= 0) - avahi_interface_new(m, hw, AVAHI_PROTO_INET); - if (m->server->fd_ipv6 >= 0) - avahi_interface_new(m, hw, AVAHI_PROTO_INET6); - - return hw; -} - -AvahiInterfaceAddress *avahi_interface_address_new(AvahiInterfaceMonitor *m, AvahiInterface *i, const AvahiAddress *addr, unsigned prefix_len) { - AvahiInterfaceAddress *a; - - assert(m); - assert(i); - - if (!(a = avahi_new(AvahiInterfaceAddress, 1))) - return NULL; - - a->interface = i; - a->monitor = m; - a->address = *addr; - a->prefix_len = prefix_len; - a->global_scope = 0; - a->entry_group = NULL; - - AVAHI_LLIST_PREPEND(AvahiInterfaceAddress, address, i->addresses, a); - - return a; -} - -void avahi_interface_check_relevant(AvahiInterface *i) { - int b; - AvahiInterfaceMonitor *m; - - assert(i); - m = i->monitor; - - b = avahi_interface_is_relevant(i); - - if (m->list_complete && b && !i->announcing) { - avahi_log_info("New relevant interface %s.%s for mDNS.", i->hardware->name, avahi_proto_to_string(i->protocol)); - - interface_mdns_mcast_join(i, 1); - - i->announcing = 1; - avahi_announce_interface(m->server, i); - avahi_multicast_lookup_engine_new_interface(m->server->multicast_lookup_engine, i); - } else if (!b && i->announcing) { - avahi_log_info("Interface %s.%s no longer relevant for mDNS.", i->hardware->name, avahi_proto_to_string(i->protocol)); - - interface_mdns_mcast_join(i, 0); - - avahi_goodbye_interface(m->server, i, 0, 1); - avahi_querier_free_all(i); - - avahi_response_scheduler_clear(i->response_scheduler); - avahi_query_scheduler_clear(i->query_scheduler); - avahi_probe_scheduler_clear(i->probe_scheduler); - avahi_cache_flush(i->cache); - - i->announcing = 0; - - } else - interface_mdns_mcast_rejoin(i); -} - -void avahi_hw_interface_check_relevant(AvahiHwInterface *hw) { - AvahiInterface *i; - - assert(hw); - - for (i = hw->interfaces; i; i = i->by_hardware_next) - avahi_interface_check_relevant(i); -} - -void avahi_interface_monitor_check_relevant(AvahiInterfaceMonitor *m) { - AvahiInterface *i; - - assert(m); - - for (i = m->interfaces; i; i = i->interface_next) - avahi_interface_check_relevant(i); -} - -AvahiInterfaceMonitor *avahi_interface_monitor_new(AvahiServer *s) { - AvahiInterfaceMonitor *m = NULL; - - if (!(m = avahi_new0(AvahiInterfaceMonitor, 1))) - return NULL; /* OOM */ - - m->server = s; - m->list_complete = 0; - m->hashmap = avahi_hashmap_new(avahi_int_hash, avahi_int_equal, NULL, NULL); - - AVAHI_LLIST_HEAD_INIT(AvahiInterface, m->interfaces); - AVAHI_LLIST_HEAD_INIT(AvahiHwInterface, m->hw_interfaces); - - if (avahi_interface_monitor_init_osdep(m) < 0) - goto fail; - - return m; - -fail: - avahi_interface_monitor_free(m); - return NULL; -} - -void avahi_interface_monitor_free(AvahiInterfaceMonitor *m) { - assert(m); - - while (m->hw_interfaces) - avahi_hw_interface_free(m->hw_interfaces, 1); - - assert(!m->interfaces); - - avahi_interface_monitor_free_osdep(m); - - if (m->hashmap) - avahi_hashmap_free(m->hashmap); - - avahi_free(m); -} - - -AvahiInterface* avahi_interface_monitor_get_interface(AvahiInterfaceMonitor *m, AvahiIfIndex idx, AvahiProtocol protocol) { - AvahiHwInterface *hw; - AvahiInterface *i; - - assert(m); - assert(idx >= 0); - assert(protocol != AVAHI_PROTO_UNSPEC); - - if (!(hw = avahi_interface_monitor_get_hw_interface(m, idx))) - return NULL; - - for (i = hw->interfaces; i; i = i->by_hardware_next) - if (i->protocol == protocol) - return i; - - return NULL; -} - -AvahiHwInterface* avahi_interface_monitor_get_hw_interface(AvahiInterfaceMonitor *m, AvahiIfIndex idx) { - assert(m); - assert(idx > 0); - - return avahi_hashmap_lookup(m->hashmap, &idx); -} - -AvahiInterfaceAddress* avahi_interface_monitor_get_address(AvahiInterfaceMonitor *m, AvahiInterface *i, const AvahiAddress *raddr) { - AvahiInterfaceAddress *ia; - - assert(m); - assert(i); - assert(raddr); - - for (ia = i->addresses; ia; ia = ia->address_next) - if (avahi_address_cmp(&ia->address, raddr) == 0) - return ia; - - return NULL; -} - -void avahi_interface_send_packet_unicast(AvahiInterface *i, AvahiDnsPacket *p, const AvahiAddress *a, uint16_t port) { - assert(i); - assert(p); - - if (!avahi_interface_is_relevant(i)) - return; - - assert(!a || a->proto == i->protocol); - - if (i->protocol == AVAHI_PROTO_INET && i->monitor->server->fd_ipv4 >= 0) - avahi_send_dns_packet_ipv4(i->monitor->server->fd_ipv4, i->hardware->index, p, i->mcast_joined ? &i->local_mcast_address.data.ipv4 : NULL, a ? &a->data.ipv4 : NULL, port); - else if (i->protocol == AVAHI_PROTO_INET6 && i->monitor->server->fd_ipv6 >= 0) - avahi_send_dns_packet_ipv6(i->monitor->server->fd_ipv6, i->hardware->index, p, i->mcast_joined ? &i->local_mcast_address.data.ipv6 : NULL, a ? &a->data.ipv6 : NULL, port); -} - -void avahi_interface_send_packet(AvahiInterface *i, AvahiDnsPacket *p) { - assert(i); - assert(p); - - avahi_interface_send_packet_unicast(i, p, NULL, 0); -} - -int avahi_interface_post_query(AvahiInterface *i, AvahiKey *key, int immediately, unsigned *ret_id) { - assert(i); - assert(key); - - if (avahi_interface_is_relevant(i)) - return avahi_query_scheduler_post(i->query_scheduler, key, immediately, ret_id); - - return 0; -} - -int avahi_interface_withraw_query(AvahiInterface *i, unsigned id) { - - return avahi_query_scheduler_withdraw_by_id(i->query_scheduler, id); -} - -int avahi_interface_post_response(AvahiInterface *i, AvahiRecord *record, int flush_cache, const AvahiAddress *querier, int immediately) { - assert(i); - assert(record); - - if (avahi_interface_is_relevant(i)) - return avahi_response_scheduler_post(i->response_scheduler, record, flush_cache, querier, immediately); - - return 0; -} - -int avahi_interface_post_probe(AvahiInterface *i, AvahiRecord *record, int immediately) { - assert(i); - assert(record); - - if (avahi_interface_is_relevant(i)) - return avahi_probe_scheduler_post(i->probe_scheduler, record, immediately); - - return 0; -} - -int avahi_dump_caches(AvahiInterfaceMonitor *m, AvahiDumpCallback callback, void* userdata) { - AvahiInterface *i; - assert(m); - - for (i = m->interfaces; i; i = i->interface_next) { - if (avahi_interface_is_relevant(i)) { - char ln[256]; - snprintf(ln, sizeof(ln), ";;; INTERFACE %s.%s ;;;", i->hardware->name, avahi_proto_to_string(i->protocol)); - callback(ln, userdata); - if (avahi_cache_dump(i->cache, callback, userdata) < 0) - return -1; - } - } - - return 0; -} - -int avahi_interface_is_relevant(AvahiInterface *i) { - AvahiInterfaceAddress *a; - int relevant_address; - - assert(i); - - relevant_address = 0; - - for (a = i->addresses; a; a = a->address_next) - if (avahi_interface_address_is_relevant(a)) { - relevant_address = 1; - break; - } - - return i->hardware->flags_ok && relevant_address; -} - -int avahi_interface_address_is_relevant(AvahiInterfaceAddress *a) { - AvahiInterfaceAddress *b; - assert(a); - - /* Publish public IP addresses */ - if (a->global_scope) - return 1; - else { - - /* Publish link local IP addresses if they are the only ones on the link */ - for (b = a->interface->addresses; b; b = b->address_next) { - if (b == a) - continue; - - if (b->global_scope) - return 0; - } - - return 1; - } - - return 0; -} - -int avahi_interface_match(AvahiInterface *i, AvahiIfIndex idx, AvahiProtocol protocol) { - assert(i); - - if (idx != AVAHI_IF_UNSPEC && idx != i->hardware->index) - return 0; - - if (protocol != AVAHI_PROTO_UNSPEC && protocol != i->protocol) - return 0; - - return 1; -} - -void avahi_interface_monitor_walk(AvahiInterfaceMonitor *m, AvahiIfIndex interface, AvahiProtocol protocol, AvahiInterfaceMonitorWalkCallback callback, void* userdata) { - assert(m); - assert(callback); - - if (interface != AVAHI_IF_UNSPEC) { - if (protocol != AVAHI_PROTO_UNSPEC) { - AvahiInterface *i; - - if ((i = avahi_interface_monitor_get_interface(m, interface, protocol))) - callback(m, i, userdata); - - } else { - AvahiHwInterface *hw; - AvahiInterface *i; - - if ((hw = avahi_interface_monitor_get_hw_interface(m, interface))) - for (i = hw->interfaces; i; i = i->by_hardware_next) - if (avahi_interface_match(i, interface, protocol)) - callback(m, i, userdata); - } - - } else { - AvahiInterface *i; - - for (i = m->interfaces; i; i = i->interface_next) - if (avahi_interface_match(i, interface, protocol)) - callback(m, i, userdata); - } -} - - -int avahi_address_is_local(AvahiInterfaceMonitor *m, const AvahiAddress *a) { - AvahiInterface *i; - AvahiInterfaceAddress *ia; - assert(m); - assert(a); - - for (i = m->interfaces; i; i = i->interface_next) - for (ia = i->addresses; ia; ia = ia->address_next) - if (avahi_address_cmp(a, &ia->address) == 0) - return 1; - - return 0; -} - -int avahi_interface_address_on_link(AvahiInterface *i, const AvahiAddress *a) { - AvahiInterfaceAddress *ia; - - assert(i); - assert(a); - - if (a->proto != i->protocol) - return 0; - - for (ia = i->addresses; ia; ia = ia->address_next) { - - if (a->proto == AVAHI_PROTO_INET) { - uint32_t m; - - m = ~(((uint32_t) -1) >> ia->prefix_len); - - if ((ntohl(a->data.ipv4.address) & m) == (ntohl(ia->address.data.ipv4.address) & m)) - return 1; - } else { - unsigned j; - unsigned char pl; - assert(a->proto == AVAHI_PROTO_INET6); - - pl = ia->prefix_len; - - for (j = 0; j < 16; j++) { - uint8_t m; - - if (pl == 0) - return 1; - - if (pl >= 8) { - m = 0xFF; - pl -= 8; - } else { - m = ~(0xFF >> pl); - pl = 0; - } - - if ((a->data.ipv6.address[j] & m) != (ia->address.data.ipv6.address[j] & m)) - break; - } - } - } - - return 0; -} - -int avahi_interface_has_address(AvahiInterfaceMonitor *m, AvahiIfIndex iface, const AvahiAddress *a) { - AvahiInterface *i; - AvahiInterfaceAddress *j; - - assert(m); - assert(iface != AVAHI_IF_UNSPEC); - assert(a); - - if (!(i = avahi_interface_monitor_get_interface(m, iface, a->proto))) - return 0; - - for (j = i->addresses; j; j = j->address_next) - if (avahi_address_cmp(a, &j->address) == 0) - return 1; - - return 0; -} - -AvahiIfIndex avahi_find_interface_for_address(AvahiInterfaceMonitor *m, const AvahiAddress *a) { - AvahiInterface *i; - assert(m); - - /* Some stupid OS don't support passing the interface index when a - * packet is recieved. We have to work around that limitation by - * looking for an interface that has the incoming address - * attached. This is sometimes ambiguous, but we have to live with - * it. */ - - for (i = m->interfaces; i; i = i->interface_next) { - AvahiInterfaceAddress *ai; - - if (i->protocol != a->proto) - continue; - - for (ai = i->addresses; ai; ai = ai->address_next) - if (avahi_address_cmp(a, &ai->address) == 0) - return i->hardware->index; - } - - return AVAHI_IF_UNSPEC; -} |