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/***
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 <avahi-common/domain.h>
#include <avahi-common/malloc.h>
#include <avahi-common/error.h>
#include "browse.h"
#include "log.h"
struct AvahiSServiceTypeBrowser {
AvahiServer *server;
char *domain_name;
AvahiSRecordBrowser *record_browser;
AvahiSServiceTypeBrowserCallback callback;
void* userdata;
AVAHI_LLIST_FIELDS(AvahiSServiceTypeBrowser, browser);
};
static void record_browser_callback(
AvahiSRecordBrowser*rr,
AvahiIfIndex interface,
AvahiProtocol protocol,
AvahiBrowserEvent event,
AvahiRecord *record,
AvahiLookupResultFlags flags,
void* userdata) {
AvahiSServiceTypeBrowser *b = userdata;
assert(rr);
assert(b);
/* Filter flags */
flags &= AVAHI_LOOKUP_RESULT_CACHED | AVAHI_LOOKUP_RESULT_MULTICAST | AVAHI_LOOKUP_RESULT_WIDE_AREA;
if (record) {
char type[AVAHI_DOMAIN_NAME_MAX], domain[AVAHI_DOMAIN_NAME_MAX];
assert(record->key->type == AVAHI_DNS_TYPE_PTR);
if (avahi_service_name_split(record->data.ptr.name, NULL, 0, type, sizeof(type), domain, sizeof(domain)) < 0) {
avahi_log_warn("Invalid service type '%s'", record->key->name);
return;
}
b->callback(b, interface, protocol, event, type, domain, flags, b->userdata);
} else
b->callback(b, interface, protocol, event, NULL, b->domain_name, flags, b->userdata);
}
AvahiSServiceTypeBrowser *avahi_s_service_type_browser_prepare(
AvahiServer *server,
AvahiIfIndex interface,
AvahiProtocol protocol,
const char *domain,
AvahiLookupFlags flags,
AvahiSServiceTypeBrowserCallback callback,
void* userdata) {
AvahiSServiceTypeBrowser *b;
AvahiKey *k = NULL;
char n[AVAHI_DOMAIN_NAME_MAX];
int r;
assert(server);
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, !domain || avahi_is_valid_domain_name(domain), AVAHI_ERR_INVALID_DOMAIN_NAME);
AVAHI_CHECK_VALIDITY_RETURN_NULL(server, AVAHI_FLAGS_VALID(flags, AVAHI_LOOKUP_USE_WIDE_AREA|AVAHI_LOOKUP_USE_MULTICAST), AVAHI_ERR_INVALID_FLAGS);
if (!domain)
domain = server->domain_name;
if ((r = avahi_service_name_join(n, sizeof(n), NULL, "_services._dns-sd._udp", domain)) < 0) {
avahi_server_set_errno(server, r);
return NULL;
}
if (!(b = avahi_new(AvahiSServiceTypeBrowser, 1))) {
avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
return NULL;
}
b->server = server;
b->callback = callback;
b->userdata = userdata;
b->record_browser = NULL;
AVAHI_LLIST_PREPEND(AvahiSServiceTypeBrowser, browser, server->service_type_browsers, b);
if (!(b->domain_name = avahi_normalize_name_strdup(domain))) {
avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
goto fail;
}
if (!(k = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR))) {
avahi_server_set_errno(server, AVAHI_ERR_NO_MEMORY);
goto fail;
}
if (!(b->record_browser = avahi_s_record_browser_prepare(server, interface, protocol, k, flags, record_browser_callback, b)))
goto fail;
avahi_key_unref(k);
return b;
fail:
if (k)
avahi_key_unref(k);
avahi_s_service_type_browser_free(b);
return NULL;
}
void avahi_s_service_type_browser_free(AvahiSServiceTypeBrowser *b) {
assert(b);
AVAHI_LLIST_REMOVE(AvahiSServiceTypeBrowser, browser, b->server->service_type_browsers, b);
if (b->record_browser)
avahi_s_record_browser_free(b->record_browser);
avahi_free(b->domain_name);
avahi_free(b);
}
void avahi_s_service_type_browser_start(AvahiSServiceTypeBrowser *b) {
assert(b);
avahi_s_record_browser_start_query(b->record_browser);
}
AvahiSServiceTypeBrowser *avahi_s_service_type_browser_new(
AvahiServer *server,
AvahiIfIndex interface,
AvahiProtocol protocol,
const char *domain,
AvahiLookupFlags flags,
AvahiSServiceTypeBrowserCallback callback,
void* userdata) {
AvahiSServiceTypeBrowser *b;
b = avahi_s_service_type_browser_prepare(server, interface, protocol, domain, flags, callback, userdata);
if (!b)
return NULL;
avahi_s_service_type_browser_start(b);
return b;
}
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