+++ /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 <stdlib.h>
-
-#include <avahi-common/timeval.h>
-#include <avahi-common/malloc.h>
-#include <avahi-common/error.h>
-#include <avahi-common/domain.h>
-
-#include "browse.h"
-
-#define TIMEOUT_MSEC 5000
-
-struct AvahiSAddressResolver {
- AvahiServer *server;
- AvahiAddress address;
-
- AvahiSRecordBrowser *record_browser;
-
- AvahiSAddressResolverCallback callback;
- void* userdata;
-
- AvahiRecord *ptr_record;
- AvahiIfIndex interface;
- AvahiProtocol protocol;
- AvahiLookupResultFlags flags;
-
- int retry_with_multicast;
- AvahiKey *key;
-
- AvahiTimeEvent *time_event;
-
- AVAHI_LLIST_FIELDS(AvahiSAddressResolver, resolver);
-};
-
-static void finish(AvahiSAddressResolver *r, AvahiResolverEvent event) {
- assert(r);
-
- if (r->time_event) {
- avahi_time_event_free(r->time_event);
- r->time_event = NULL;
- }
-
- switch (event) {
- case AVAHI_RESOLVER_FAILURE:
- r->callback(r, r->interface, r->protocol, event, &r->address, NULL, r->flags, r->userdata);
- break;
-
- case AVAHI_RESOLVER_FOUND:
- assert(r->ptr_record);
- r->callback(r, r->interface, r->protocol, event, &r->address, r->ptr_record->data.ptr.name, r->flags, r->userdata);
- break;
- }
-}
-
-static void time_event_callback(AvahiTimeEvent *e, void *userdata) {
- AvahiSAddressResolver *r = userdata;
-
- assert(e);
- assert(r);
-
- avahi_server_set_errno(r->server, AVAHI_ERR_TIMEOUT);
- finish(r, AVAHI_RESOLVER_FAILURE);
-}
-
-static void start_timeout(AvahiSAddressResolver *r) {
- struct timeval tv;
- assert(r);
-
- if (r->time_event)
- return;
-
- avahi_elapse_time(&tv, TIMEOUT_MSEC, 0);
- r->time_event = avahi_time_event_new(r->server->time_event_queue, &tv, time_event_callback, r);
-}
-
-static void record_browser_callback(
- AvahiSRecordBrowser*rr,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- AvahiBrowserEvent event,
- AvahiRecord *record,
- AvahiLookupResultFlags flags,
- void* userdata) {
-
- AvahiSAddressResolver *r = userdata;
-
- assert(rr);
- assert(r);
-
- switch (event) {
- case AVAHI_BROWSER_NEW:
- assert(record);
- assert(record->key->type == AVAHI_DNS_TYPE_PTR);
-
- if (r->interface > 0 && interface != r->interface)
- return;
-
- if (r->protocol != AVAHI_PROTO_UNSPEC && protocol != r->protocol)
- return;
-
- if (r->interface <= 0)
- r->interface = interface;
-
- if (r->protocol == AVAHI_PROTO_UNSPEC)
- r->protocol = protocol;
-
- if (!r->ptr_record) {
- r->ptr_record = avahi_record_ref(record);
- r->flags = flags;
-
- finish(r, AVAHI_RESOLVER_FOUND);
- }
- break;
-
- case AVAHI_BROWSER_REMOVE:
- assert(record);
- assert(record->key->type == AVAHI_DNS_TYPE_PTR);
-
- if (r->ptr_record && avahi_record_equal_no_ttl(record, r->ptr_record)) {
- avahi_record_unref(r->ptr_record);
- r->ptr_record = NULL;
- r->flags = flags;
-
- /** Look for a replacement */
- avahi_s_record_browser_restart(r->record_browser);
- start_timeout(r);
- }
-
- break;
-
- case AVAHI_BROWSER_CACHE_EXHAUSTED:
- case AVAHI_BROWSER_ALL_FOR_NOW:
- break;
-
- case AVAHI_BROWSER_FAILURE:
-
- if (r->retry_with_multicast) {
- r->retry_with_multicast = 0;
-
- avahi_s_record_browser_free(r->record_browser);
- r->record_browser = avahi_s_record_browser_new(r->server, r->interface, r->protocol, r->key, AVAHI_LOOKUP_USE_MULTICAST, record_browser_callback, r);
-
- if (r->record_browser) {
- start_timeout(r);
- break;
- }
- }
-
- r->flags = flags;
- finish(r, AVAHI_RESOLVER_FAILURE);
- break;
- }
-}
-
-AvahiSAddressResolver *avahi_s_address_resolver_new(
- AvahiServer *server,
- AvahiIfIndex interface,
- AvahiProtocol protocol,
- const AvahiAddress *address,
- AvahiLookupFlags flags,
- AvahiSAddressResolverCallback callback,
- void* userdata) {
-
- AvahiSAddressResolver *r;
- AvahiKey *k;
- char n[AVAHI_DOMAIN_NAME_MAX];
-
- assert(server);
- assert(address);
- assert(callback);
-
- AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_IF_VALID(interface), AVAHI_ERR_INVALID_INTERFACE);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_PROTO_VALID(protocol), AVAHI_ERR_INVALID_PROTOCOL);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(server, address->proto == AVAHI_PROTO_INET || address->proto == AVAHI_PROTO_INET6, AVAHI_ERR_INVALID_PROTOCOL);
- AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
-
- avahi_reverse_lookup_name(address, n, sizeof(n));
-
- if (!(k = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR))) {
- avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
- return NULL;
- }
-
- if (!(r = avahi_new(AvahiSAddressResolver, 1))) {
- avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
- avahi_key_unref(k);
- return NULL;
- }
-
- r->server = server;
- r->address = *address;
- r->callback = callback;
- r->userdata = userdata;
- r->ptr_record = NULL;
- r->interface = interface;
- r->protocol = protocol;
- r->flags = 0;
- r->retry_with_multicast = 0;
- r->key = k;
-
- r->record_browser = NULL;
- AVAHI_LLIST_PREPEND(AvahiSAddressResolver, resolver, server->address_resolvers, r);
-
- r->time_event = NULL;
-
- if (!(flags & (AVAHI_LOOKUP_USE_MULTICAST|AVAHI_LOOKUP_USE_WIDE_AREA))) {
-
- if (!server->wide_area_lookup_engine || !avahi_wide_area_has_servers(server->wide_area_lookup_engine))
- flags |= AVAHI_LOOKUP_USE_MULTICAST;
- else {
- flags |= AVAHI_LOOKUP_USE_WIDE_AREA;
- r->retry_with_multicast = 1;
- }
- }
-
- r->record_browser = avahi_s_record_browser_new(server, interface, protocol, k, flags, record_browser_callback, r);
-
- if (!r->record_browser) {
- avahi_s_address_resolver_free(r);
- return NULL;
- }
-
- start_timeout(r);
-
- return r;
-}
-
-void avahi_s_address_resolver_free(AvahiSAddressResolver *r) {
- assert(r);
-
- AVAHI_LLIST_REMOVE(AvahiSAddressResolver, resolver, r->server->address_resolvers, r);
-
- if (r->record_browser)
- avahi_s_record_browser_free(r->record_browser);
-
- if (r->time_event)
- avahi_time_event_free(r->time_event);
-
- if (r->ptr_record)
- avahi_record_unref(r->ptr_record);
-
- if (r->key)
- avahi_key_unref(r->key);
-
- avahi_free(r);
-}
projects / catta / blobdiff