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/* $Id$ */
/***
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 <avahi-common/timeval.h>
#include <avahi-common/malloc.h>
#include "browse.h"
struct AvahiAddressResolver {
AvahiServer *server;
AvahiAddress address;
AvahiRecordBrowser *record_browser;
AvahiAddressResolverCallback callback;
void* userdata;
AvahiTimeEvent *time_event;
AVAHI_LLIST_FIELDS(AvahiAddressResolver, resolver);
};
static void finish(AvahiAddressResolver *r, AvahiIfIndex interface, AvahiProtocol protocol, AvahiResolverEvent event, AvahiRecord *record) {
assert(r);
avahi_record_browser_free(r->record_browser);
r->record_browser = NULL;
if (r->time_event) {
avahi_time_event_free(r->time_event);
r->time_event = NULL;
}
r->callback(r, interface, protocol, event, &r->address, record ? record->data.ptr.name : NULL, r->userdata);
}
static void record_browser_callback(AvahiRecordBrowser*rr, AvahiIfIndex interface, AvahiProtocol protocol, AvahiBrowserEvent event, AvahiRecord *record, void* userdata) {
AvahiAddressResolver *r = userdata;
assert(rr);
assert(record);
assert(r);
if (!(event == AVAHI_BROWSER_NEW))
return;
assert(record->key->type == AVAHI_DNS_TYPE_PTR);
finish(r, interface, protocol, AVAHI_RESOLVER_FOUND, record);
}
static void time_event_callback(AvahiTimeEvent *e, void *userdata) {
AvahiAddressResolver *r = userdata;
assert(e);
assert(r);
finish(r, -1, AVAHI_PROTO_UNSPEC, AVAHI_RESOLVER_TIMEOUT, NULL);
}
AvahiAddressResolver *avahi_address_resolver_new(AvahiServer *server, AvahiIfIndex interface, AvahiProtocol protocol, const AvahiAddress *address, AvahiAddressResolverCallback callback, void* userdata) {
AvahiAddressResolver *r;
AvahiKey *k;
char *n;
struct timeval tv;
assert(server);
assert(address);
assert(callback);
assert(address->family == AVAHI_PROTO_INET || address->family == AVAHI_PROTO_INET6);
if (address->family == AVAHI_PROTO_INET)
n = avahi_reverse_lookup_name_ipv4(&address->data.ipv4);
else
n = avahi_reverse_lookup_name_ipv6_arpa(&address->data.ipv6);
if (!n) {
avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
return NULL;
}
k = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR);
avahi_free(n);
if (!k) {
avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
return NULL;
}
if (!(r = avahi_new(AvahiAddressResolver, 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->record_browser = NULL;
AVAHI_LLIST_PREPEND(AvahiAddressResolver, resolver, server->address_resolvers, r);
avahi_elapse_time(&tv, 1000, 0);
if (!(r->time_event = avahi_time_event_new(server->time_event_queue, &tv, time_event_callback, r))) {
avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
avahi_address_resolver_free(r);
avahi_key_unref(k);
return NULL;
}
r->record_browser = avahi_record_browser_new(server, interface, protocol, k, record_browser_callback, r);
avahi_key_unref(k);
if (!r->record_browser) {
avahi_address_resolver_free(r);
return NULL;
}
return r;
}
void avahi_address_resolver_free(AvahiAddressResolver *r) {
assert(r);
AVAHI_LLIST_REMOVE(AvahiAddressResolver, resolver, r->server->address_resolvers, r);
if (r->record_browser)
avahi_record_browser_free(r->record_browser);
if (r->time_event)
avahi_time_event_free(r->time_event);
avahi_free(r);
}
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