+++ /dev/null
-/***
- 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 <errno.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <netinet/in.h>
-
-#include <avahi-common/malloc.h>
-#include <avahi-common/error.h>
-#include <avahi-common/timeval.h>
-
-#include "internal.h"
-#include "browse.h"
-#include "socket.h"
-#include "log.h"
-#include "hashmap.h"
-#include "wide-area.h"
-#include "addr-util.h"
-#include "rr-util.h"
-
-#define CACHE_ENTRIES_MAX 500
-
-typedef struct AvahiWideAreaCacheEntry AvahiWideAreaCacheEntry;
-
-struct AvahiWideAreaCacheEntry {
- AvahiWideAreaLookupEngine *engine;
-
- AvahiRecord *record;
- struct timeval timestamp;
- struct timeval expiry;
-
- AvahiTimeEvent *time_event;
-
- AVAHI_LLIST_FIELDS(AvahiWideAreaCacheEntry, by_key);
- AVAHI_LLIST_FIELDS(AvahiWideAreaCacheEntry, cache);
-};
-
-struct AvahiWideAreaLookup {
- AvahiWideAreaLookupEngine *engine;
- int dead;
-
- uint32_t id; /* effectively just an uint16_t, but we need it as an index for a hash table */
- AvahiTimeEvent *time_event;
-
- AvahiKey *key, *cname_key;
-
- int n_send;
- AvahiDnsPacket *packet;
-
- AvahiWideAreaLookupCallback callback;
- void *userdata;
-
- AvahiAddress dns_server_used;
-
- AVAHI_LLIST_FIELDS(AvahiWideAreaLookup, lookups);
- AVAHI_LLIST_FIELDS(AvahiWideAreaLookup, by_key);
-};
-
-struct AvahiWideAreaLookupEngine {
- AvahiServer *server;
-
- int fd_ipv4, fd_ipv6;
- AvahiWatch *watch_ipv4, *watch_ipv6;
-
- uint16_t next_id;
-
- /* Cache */
- AVAHI_LLIST_HEAD(AvahiWideAreaCacheEntry, cache);
- AvahiHashmap *cache_by_key;
- unsigned cache_n_entries;
-
- /* Lookups */
- AVAHI_LLIST_HEAD(AvahiWideAreaLookup, lookups);
- AvahiHashmap *lookups_by_id;
- AvahiHashmap *lookups_by_key;
-
- int cleanup_dead;
-
- AvahiAddress dns_servers[AVAHI_WIDE_AREA_SERVERS_MAX];
- unsigned n_dns_servers;
- unsigned current_dns_server;
-};
-
-static AvahiWideAreaLookup* find_lookup(AvahiWideAreaLookupEngine *e, uint16_t id) {
- AvahiWideAreaLookup *l;
- int i = (int) id;
-
- assert(e);
-
- if (!(l = avahi_hashmap_lookup(e->lookups_by_id, &i)))
- return NULL;
-
- assert(l->id == id);
-
- if (l->dead)
- return NULL;
-
- return l;
-}
-
-static int send_to_dns_server(AvahiWideAreaLookup *l, AvahiDnsPacket *p) {
- AvahiAddress *a;
-
- assert(l);
- assert(p);
-
- if (l->engine->n_dns_servers <= 0)
- return -1;
-
- assert(l->engine->current_dns_server < l->engine->n_dns_servers);
-
- a = &l->engine->dns_servers[l->engine->current_dns_server];
- l->dns_server_used = *a;
-
- if (a->proto == AVAHI_PROTO_INET) {
-
- if (l->engine->fd_ipv4 < 0)
- return -1;
-
- return avahi_send_dns_packet_ipv4(l->engine->fd_ipv4, AVAHI_IF_UNSPEC, p, NULL, &a->data.ipv4, AVAHI_DNS_PORT);
-
- } else {
- assert(a->proto == AVAHI_PROTO_INET6);
-
- if (l->engine->fd_ipv6 < 0)
- return -1;
-
- return avahi_send_dns_packet_ipv6(l->engine->fd_ipv6, AVAHI_IF_UNSPEC, p, NULL, &a->data.ipv6, AVAHI_DNS_PORT);
- }
-}
-
-static void next_dns_server(AvahiWideAreaLookupEngine *e) {
- assert(e);
-
- e->current_dns_server++;
-
- if (e->current_dns_server >= e->n_dns_servers)
- e->current_dns_server = 0;
-}
-
-static void lookup_stop(AvahiWideAreaLookup *l) {
- assert(l);
-
- l->callback = NULL;
-
- if (l->time_event) {
- avahi_time_event_free(l->time_event);
- l->time_event = NULL;
- }
-}
-
-static void sender_timeout_callback(AvahiTimeEvent *e, void *userdata) {
- AvahiWideAreaLookup *l = userdata;
- struct timeval tv;
-
- assert(l);
-
- /* Try another DNS server after three retries */
- if (l->n_send >= 3 && avahi_address_cmp(&l->engine->dns_servers[l->engine->current_dns_server], &l->dns_server_used) == 0) {
- next_dns_server(l->engine);
-
- if (avahi_address_cmp(&l->engine->dns_servers[l->engine->current_dns_server], &l->dns_server_used) == 0)
- /* There is no other DNS server, fail */
- l->n_send = 1000;
- }
-
- if (l->n_send >= 6) {
- avahi_log_warn(__FILE__": Query timed out.");
- avahi_server_set_errno(l->engine->server, AVAHI_ERR_TIMEOUT);
- l->callback(l->engine, AVAHI_BROWSER_FAILURE, AVAHI_LOOKUP_RESULT_WIDE_AREA, NULL, l->userdata);
- lookup_stop(l);
- return;
- }
-
- assert(l->packet);
- send_to_dns_server(l, l->packet);
- l->n_send++;
-
- avahi_time_event_update(e, avahi_elapse_time(&tv, 1000, 0));
-}
-
-AvahiWideAreaLookup *avahi_wide_area_lookup_new(
- AvahiWideAreaLookupEngine *e,
- AvahiKey *key,
- AvahiWideAreaLookupCallback callback,
- void *userdata) {
-
- struct timeval tv;
- AvahiWideAreaLookup *l, *t;
- uint8_t *p;
-
- assert(e);
- assert(key);
- assert(callback);
- assert(userdata);
-
- l = avahi_new(AvahiWideAreaLookup, 1);
- l->engine = e;
- l->dead = 0;
- l->key = avahi_key_ref(key);
- l->cname_key = avahi_key_new_cname(l->key);
- l->callback = callback;
- l->userdata = userdata;
-
- /* If more than 65K wide area quries are issued simultaneously,
- * this will break. This should be limited by some higher level */
-
- for (;; e->next_id++)
- if (!find_lookup(e, e->next_id))
- break; /* This ID is not yet used. */
-
- l->id = e->next_id++;
-
- /* We keep the packet around in case we need to repeat our query */
- l->packet = avahi_dns_packet_new(0);
-
- avahi_dns_packet_set_field(l->packet, AVAHI_DNS_FIELD_ID, (uint16_t) l->id);
- avahi_dns_packet_set_field(l->packet, AVAHI_DNS_FIELD_FLAGS, AVAHI_DNS_FLAGS(0, 0, 0, 0, 1, 0, 0, 0, 0, 0));
-
- p = avahi_dns_packet_append_key(l->packet, key, 0);
- assert(p);
-
- avahi_dns_packet_set_field(l->packet, AVAHI_DNS_FIELD_QDCOUNT, 1);
-
- if (send_to_dns_server(l, l->packet) < 0) {
- avahi_log_error(__FILE__": Failed to send packet.");
- avahi_dns_packet_free(l->packet);
- avahi_key_unref(l->key);
- if (l->cname_key)
- avahi_key_unref(l->cname_key);
- avahi_free(l);
- return NULL;
- }
-
- l->n_send = 1;
-
- l->time_event = avahi_time_event_new(e->server->time_event_queue, avahi_elapse_time(&tv, 500, 0), sender_timeout_callback, l);
-
- avahi_hashmap_insert(e->lookups_by_id, &l->id, l);
-
- t = avahi_hashmap_lookup(e->lookups_by_key, l->key);
- AVAHI_LLIST_PREPEND(AvahiWideAreaLookup, by_key, t, l);
- avahi_hashmap_replace(e->lookups_by_key, avahi_key_ref(l->key), t);
-
- AVAHI_LLIST_PREPEND(AvahiWideAreaLookup, lookups, e->lookups, l);
-
- return l;
-}
-
-static void lookup_destroy(AvahiWideAreaLookup *l) {
- AvahiWideAreaLookup *t;
- assert(l);
-
- lookup_stop(l);
-
- t = avahi_hashmap_lookup(l->engine->lookups_by_key, l->key);
- AVAHI_LLIST_REMOVE(AvahiWideAreaLookup, by_key, t, l);
- if (t)
- avahi_hashmap_replace(l->engine->lookups_by_key, avahi_key_ref(l->key), t);
- else
- avahi_hashmap_remove(l->engine->lookups_by_key, l->key);
-
- AVAHI_LLIST_REMOVE(AvahiWideAreaLookup, lookups, l->engine->lookups, l);
-
- avahi_hashmap_remove(l->engine->lookups_by_id, &l->id);
- avahi_dns_packet_free(l->packet);
-
- if (l->key)
- avahi_key_unref(l->key);
-
- if (l->cname_key)
- avahi_key_unref(l->cname_key);
-
- avahi_free(l);
-}
-
-void avahi_wide_area_lookup_free(AvahiWideAreaLookup *l) {
- assert(l);
-
- if (l->dead)
- return;
-
- l->dead = 1;
- l->engine->cleanup_dead = 1;
- lookup_stop(l);
-}
-
-void avahi_wide_area_cleanup(AvahiWideAreaLookupEngine *e) {
- AvahiWideAreaLookup *l, *n;
- assert(e);
-
- while (e->cleanup_dead) {
- e->cleanup_dead = 0;
-
- for (l = e->lookups; l; l = n) {
- n = l->lookups_next;
-
- if (l->dead)
- lookup_destroy(l);
- }
- }
-}
-
-static void cache_entry_free(AvahiWideAreaCacheEntry *c) {
- AvahiWideAreaCacheEntry *t;
- assert(c);
-
- if (c->time_event)
- avahi_time_event_free(c->time_event);
-
- AVAHI_LLIST_REMOVE(AvahiWideAreaCacheEntry, cache, c->engine->cache, c);
-
- t = avahi_hashmap_lookup(c->engine->cache_by_key, c->record->key);
- AVAHI_LLIST_REMOVE(AvahiWideAreaCacheEntry, by_key, t, c);
- if (t)
- avahi_hashmap_replace(c->engine->cache_by_key, avahi_key_ref(c->record->key), t);
- else
- avahi_hashmap_remove(c->engine->cache_by_key, c->record->key);
-
- c->engine->cache_n_entries --;
-
- avahi_record_unref(c->record);
- avahi_free(c);
-}
-
-static void expiry_event(AvahiTimeEvent *te, void *userdata) {
- AvahiWideAreaCacheEntry *e = userdata;
-
- assert(te);
- assert(e);
-
- cache_entry_free(e);
-}
-
-static AvahiWideAreaCacheEntry* find_record_in_cache(AvahiWideAreaLookupEngine *e, AvahiRecord *r) {
- AvahiWideAreaCacheEntry *c;
-
- assert(e);
- assert(r);
-
- for (c = avahi_hashmap_lookup(e->cache_by_key, r->key); c; c = c->by_key_next)
- if (avahi_record_equal_no_ttl(r, c->record))
- return c;
-
- return NULL;
-}
-
-static void run_callbacks(AvahiWideAreaLookupEngine *e, AvahiRecord *r) {
- AvahiWideAreaLookup *l;
-
- assert(e);
- assert(r);
-
- for (l = avahi_hashmap_lookup(e->lookups_by_key, r->key); l; l = l->by_key_next) {
- if (l->dead || !l->callback)
- continue;
-
- l->callback(e, AVAHI_BROWSER_NEW, AVAHI_LOOKUP_RESULT_WIDE_AREA, r, l->userdata);
- }
-
- if (r->key->clazz == AVAHI_DNS_CLASS_IN && r->key->type == AVAHI_DNS_TYPE_CNAME) {
- /* It's a CNAME record, so we have to scan the all lookups to see if one matches */
-
- for (l = e->lookups; l; l = l->lookups_next) {
- AvahiKey *key;
-
- if (l->dead || !l->callback)
- continue;
-
- if ((key = avahi_key_new_cname(l->key))) {
- if (avahi_key_equal(r->key, key))
- l->callback(e, AVAHI_BROWSER_NEW, AVAHI_LOOKUP_RESULT_WIDE_AREA, r, l->userdata);
-
- avahi_key_unref(key);
- }
- }
- }
-}
-
-static void add_to_cache(AvahiWideAreaLookupEngine *e, AvahiRecord *r) {
- AvahiWideAreaCacheEntry *c;
- int is_new;
-
- assert(e);
- assert(r);
-
- if ((c = find_record_in_cache(e, r))) {
- is_new = 0;
-
- /* Update the existing entry */
- avahi_record_unref(c->record);
- } else {
- AvahiWideAreaCacheEntry *t;
-
- is_new = 1;
-
- /* Enforce cache size */
- if (e->cache_n_entries >= CACHE_ENTRIES_MAX)
- /* Eventually we should improve the caching algorithm here */
- goto finish;
-
- c = avahi_new(AvahiWideAreaCacheEntry, 1);
- c->engine = e;
- c->time_event = NULL;
-
- AVAHI_LLIST_PREPEND(AvahiWideAreaCacheEntry, cache, e->cache, c);
-
- /* Add the new entry to the cache entry hash table */
- t = avahi_hashmap_lookup(e->cache_by_key, r->key);
- AVAHI_LLIST_PREPEND(AvahiWideAreaCacheEntry, by_key, t, c);
- avahi_hashmap_replace(e->cache_by_key, avahi_key_ref(r->key), t);
-
- e->cache_n_entries ++;
- }
-
- c->record = avahi_record_ref(r);
-
- gettimeofday(&c->timestamp, NULL);
- c->expiry = c->timestamp;
- avahi_timeval_add(&c->expiry, r->ttl * 1000000);
-
- if (c->time_event)
- avahi_time_event_update(c->time_event, &c->expiry);
- else
- c->time_event = avahi_time_event_new(e->server->time_event_queue, &c->expiry, expiry_event, c);
-
-finish:
-
- if (is_new)
- run_callbacks(e, r);
-}
-
-static int map_dns_error(uint16_t error) {
- static const int table[16] = {
- AVAHI_OK,
- AVAHI_ERR_DNS_FORMERR,
- AVAHI_ERR_DNS_SERVFAIL,
- AVAHI_ERR_DNS_NXDOMAIN,
- AVAHI_ERR_DNS_NOTIMP,
- AVAHI_ERR_DNS_REFUSED,
- AVAHI_ERR_DNS_YXDOMAIN,
- AVAHI_ERR_DNS_YXRRSET,
- AVAHI_ERR_DNS_NXRRSET,
- AVAHI_ERR_DNS_NOTAUTH,
- AVAHI_ERR_DNS_NOTZONE,
- AVAHI_ERR_INVALID_DNS_ERROR,
- AVAHI_ERR_INVALID_DNS_ERROR,
- AVAHI_ERR_INVALID_DNS_ERROR,
- AVAHI_ERR_INVALID_DNS_ERROR,
- AVAHI_ERR_INVALID_DNS_ERROR
- };
-
- assert(error <= 15);
-
- return table[error];
-}
-
-static void handle_packet(AvahiWideAreaLookupEngine *e, AvahiDnsPacket *p) {
- AvahiWideAreaLookup *l = NULL;
- int i, r;
-
- AvahiBrowserEvent final_event = AVAHI_BROWSER_ALL_FOR_NOW;
-
- assert(e);
- assert(p);
-
- /* Some superficial validity tests */
- if (avahi_dns_packet_check_valid(p) < 0 || avahi_dns_packet_is_query(p)) {
- avahi_log_warn(__FILE__": Ignoring invalid response for wide area datagram.");
- goto finish;
- }
-
- /* Look for the lookup that issued this query */
- if (!(l = find_lookup(e, avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ID))) || l->dead)
- goto finish;
-
- /* Check whether this a packet indicating a failure */
- if ((r = avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_FLAGS) & 15) != 0 ||
- avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) == 0) {
-
- avahi_server_set_errno(e->server, r == 0 ? AVAHI_ERR_NOT_FOUND : map_dns_error(r));
- /* Tell the user about the failure */
- final_event = AVAHI_BROWSER_FAILURE;
-
- /* We go on here, since some of the records contained in the
- reply might be interesting in some way */
- }
-
- /* Skip over the question */
- for (i = (int) avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_QDCOUNT); i > 0; i--) {
- AvahiKey *k;
-
- if (!(k = avahi_dns_packet_consume_key(p, NULL))) {
- avahi_log_warn(__FILE__": Wide area response packet too short or invalid while reading question key. (Maybe a UTF-8 problem?)");
- avahi_server_set_errno(e->server, AVAHI_ERR_INVALID_PACKET);
- final_event = AVAHI_BROWSER_FAILURE;
- goto finish;
- }
-
- avahi_key_unref(k);
- }
-
- /* Process responses */
- for (i = (int) avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ANCOUNT) +
- (int) avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_NSCOUNT) +
- (int) avahi_dns_packet_get_field(p, AVAHI_DNS_FIELD_ARCOUNT); i > 0; i--) {
-
- AvahiRecord *rr;
-
- if (!(rr = avahi_dns_packet_consume_record(p, NULL))) {
- avahi_log_warn(__FILE__": Wide area response packet too short or invalid while reading response record. (Maybe a UTF-8 problem?)");
- avahi_server_set_errno(e->server, AVAHI_ERR_INVALID_PACKET);
- final_event = AVAHI_BROWSER_FAILURE;
- goto finish;
- }
-
- add_to_cache(e, rr);
- avahi_record_unref(rr);
- }
-
-finish:
-
- if (l && !l->dead) {
- if (l->callback)
- l->callback(e, final_event, AVAHI_LOOKUP_RESULT_WIDE_AREA, NULL, l->userdata);
-
- lookup_stop(l);
- }
-}
-
-static void socket_event(AVAHI_GCC_UNUSED AvahiWatch *w, int fd, AVAHI_GCC_UNUSED AvahiWatchEvent events, void *userdata) {
- AvahiWideAreaLookupEngine *e = userdata;
- AvahiDnsPacket *p = NULL;
-
- if (fd == e->fd_ipv4)
- p = avahi_recv_dns_packet_ipv4(e->fd_ipv4, NULL, NULL, NULL, NULL, NULL);
- else {
- assert(fd == e->fd_ipv6);
- p = avahi_recv_dns_packet_ipv6(e->fd_ipv6, NULL, NULL, NULL, NULL, NULL);
- }
-
- if (p) {
- handle_packet(e, p);
- avahi_dns_packet_free(p);
- }
-}
-
-AvahiWideAreaLookupEngine *avahi_wide_area_engine_new(AvahiServer *s) {
- AvahiWideAreaLookupEngine *e;
-
- assert(s);
-
- e = avahi_new(AvahiWideAreaLookupEngine, 1);
- e->server = s;
- e->cleanup_dead = 0;
-
- /* Create sockets */
- e->fd_ipv4 = s->config.use_ipv4 ? avahi_open_unicast_socket_ipv4() : -1;
- e->fd_ipv6 = s->config.use_ipv6 ? avahi_open_unicast_socket_ipv6() : -1;
-
- if (e->fd_ipv4 < 0 && e->fd_ipv6 < 0) {
- avahi_log_error(__FILE__": Failed to create wide area sockets: %s", strerror(errno));
-
- if (e->fd_ipv6 >= 0)
- close(e->fd_ipv6);
-
- if (e->fd_ipv4 >= 0)
- close(e->fd_ipv4);
-
- avahi_free(e);
- return NULL;
- }
-
- /* Create watches */
-
- e->watch_ipv4 = e->watch_ipv6 = NULL;
-
- if (e->fd_ipv4 >= 0)
- e->watch_ipv4 = s->poll_api->watch_new(e->server->poll_api, e->fd_ipv4, AVAHI_WATCH_IN, socket_event, e);
- if (e->fd_ipv6 >= 0)
- e->watch_ipv6 = s->poll_api->watch_new(e->server->poll_api, e->fd_ipv6, AVAHI_WATCH_IN, socket_event, e);
-
- e->n_dns_servers = e->current_dns_server = 0;
- e->next_id = (uint16_t) rand();
-
- /* Initialize cache */
- AVAHI_LLIST_HEAD_INIT(AvahiWideAreaCacheEntry, e->cache);
- e->cache_by_key = avahi_hashmap_new((AvahiHashFunc) avahi_key_hash, (AvahiEqualFunc) avahi_key_equal, (AvahiFreeFunc) avahi_key_unref, NULL);
- e->cache_n_entries = 0;
-
- /* Initialize lookup list */
- e->lookups_by_id = avahi_hashmap_new((AvahiHashFunc) avahi_int_hash, (AvahiEqualFunc) avahi_int_equal, NULL, NULL);
- e->lookups_by_key = avahi_hashmap_new((AvahiHashFunc) avahi_key_hash, (AvahiEqualFunc) avahi_key_equal, (AvahiFreeFunc) avahi_key_unref, NULL);
- AVAHI_LLIST_HEAD_INIT(AvahiWideAreaLookup, e->lookups);
-
- return e;
-}
-
-void avahi_wide_area_engine_free(AvahiWideAreaLookupEngine *e) {
- assert(e);
-
- avahi_wide_area_clear_cache(e);
-
- while (e->lookups)
- lookup_destroy(e->lookups);
-
- avahi_hashmap_free(e->cache_by_key);
- avahi_hashmap_free(e->lookups_by_id);
- avahi_hashmap_free(e->lookups_by_key);
-
- if (e->watch_ipv4)
- e->server->poll_api->watch_free(e->watch_ipv4);
-
- if (e->watch_ipv6)
- e->server->poll_api->watch_free(e->watch_ipv6);
-
- if (e->fd_ipv6 >= 0)
- close(e->fd_ipv6);
-
- if (e->fd_ipv4 >= 0)
- close(e->fd_ipv4);
-
- avahi_free(e);
-}
-
-void avahi_wide_area_clear_cache(AvahiWideAreaLookupEngine *e) {
- assert(e);
-
- while (e->cache)
- cache_entry_free(e->cache);
-
- assert(e->cache_n_entries == 0);
-}
-
-void avahi_wide_area_set_servers(AvahiWideAreaLookupEngine *e, const AvahiAddress *a, unsigned n) {
- assert(e);
-
- if (a) {
- for (e->n_dns_servers = 0; n > 0 && e->n_dns_servers < AVAHI_WIDE_AREA_SERVERS_MAX; a++, n--)
- if ((a->proto == AVAHI_PROTO_INET && e->fd_ipv4 >= 0) || (a->proto == AVAHI_PROTO_INET6 && e->fd_ipv6 >= 0))
- e->dns_servers[e->n_dns_servers++] = *a;
- } else {
- assert(n == 0);
- e->n_dns_servers = 0;
- }
-
- e->current_dns_server = 0;
-
- avahi_wide_area_clear_cache(e);
-}
-
-void avahi_wide_area_cache_dump(AvahiWideAreaLookupEngine *e, AvahiDumpCallback callback, void* userdata) {
- AvahiWideAreaCacheEntry *c;
-
- assert(e);
- assert(callback);
-
- callback(";; WIDE AREA CACHE ;;; ", userdata);
-
- for (c = e->cache; c; c = c->cache_next) {
- char *t = avahi_record_to_string(c->record);
- callback(t, userdata);
- avahi_free(t);
- }
-}
-
-unsigned avahi_wide_area_scan_cache(AvahiWideAreaLookupEngine *e, AvahiKey *key, AvahiWideAreaLookupCallback callback, void *userdata) {
- AvahiWideAreaCacheEntry *c;
- AvahiKey *cname_key;
- unsigned n = 0;
-
- assert(e);
- assert(key);
- assert(callback);
-
- for (c = avahi_hashmap_lookup(e->cache_by_key, key); c; c = c->by_key_next) {
- callback(e, AVAHI_BROWSER_NEW, AVAHI_LOOKUP_RESULT_WIDE_AREA|AVAHI_LOOKUP_RESULT_CACHED, c->record, userdata);
- n++;
- }
-
- if ((cname_key = avahi_key_new_cname(key))) {
-
- for (c = avahi_hashmap_lookup(e->cache_by_key, cname_key); c; c = c->by_key_next) {
- callback(e, AVAHI_BROWSER_NEW, AVAHI_LOOKUP_RESULT_WIDE_AREA|AVAHI_LOOKUP_RESULT_CACHED, c->record, userdata);
- n++;
- }
-
- avahi_key_unref(cname_key);
- }
-
- return n;
-}
-
-int avahi_wide_area_has_servers(AvahiWideAreaLookupEngine *e) {
- assert(e);
-
- return e->n_dns_servers > 0;
-}
-
-
-
projects / catta / blobdiff