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-rw-r--r--avahi-core/resolve-service.c269
1 files changed, 269 insertions, 0 deletions
diff --git a/avahi-core/resolve-service.c b/avahi-core/resolve-service.c
new file mode 100644
index 0000000..5c0c988
--- /dev/null
+++ b/avahi-core/resolve-service.c
@@ -0,0 +1,269 @@
+/* $Id$ */
+
+/***
+ 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 "browse.h"
+#include "util.h"
+
+struct AvahiServiceResolver {
+ AvahiServer *server;
+ gchar *service_name;
+ gchar *service_type;
+ gchar *domain_name;
+ guchar address_protocol;
+
+ gint interface;
+ guchar protocol;
+
+ AvahiRecordBrowser *record_browser_srv;
+ AvahiRecordBrowser *record_browser_txt;
+ AvahiRecordBrowser *record_browser_a;
+ AvahiRecordBrowser *record_browser_aaaa;
+
+ AvahiRecord *srv_record, *txt_record, *address_record;
+
+ AvahiServiceResolverCallback callback;
+ gpointer userdata;
+
+ AvahiTimeEvent *time_event;
+
+ AVAHI_LLIST_FIELDS(AvahiServiceResolver, resolver);
+};
+
+static void finish(AvahiServiceResolver *r, AvahiResolverEvent event) {
+ g_assert(r);
+
+ if (r->record_browser_a) {
+ avahi_record_browser_free(r->record_browser_a);
+ r->record_browser_a = NULL;
+ }
+
+ if (r->record_browser_aaaa) {
+ avahi_record_browser_free(r->record_browser_aaaa);
+ r->record_browser_aaaa = NULL;
+ }
+
+ if (r->record_browser_srv) {
+ avahi_record_browser_free(r->record_browser_srv);
+ r->record_browser_srv = NULL;
+ }
+
+ if (r->record_browser_txt) {
+ avahi_record_browser_free(r->record_browser_txt);
+ r->record_browser_txt = NULL;
+ }
+
+ avahi_time_event_queue_remove(r->server->time_event_queue, r->time_event);
+ r->time_event = NULL;
+
+ if (event == AVAHI_RESOLVER_TIMEOUT)
+ r->callback(r, r->interface, r->protocol, event, r->service_name, r->service_type, r->domain_name, NULL, NULL, 0, NULL, r->userdata);
+ else {
+ AvahiAddress a;
+ gchar sn[256], st[256];
+ size_t i;
+
+ g_assert(r->srv_record);
+ g_assert(r->txt_record);
+ g_assert(r->address_record);
+
+ switch (r->address_record->key->type) {
+ case AVAHI_DNS_TYPE_A:
+ a.family = AF_INET;
+ a.data.ipv4 = r->address_record->data.a.address;
+ break;
+
+ case AVAHI_DNS_TYPE_AAAA:
+ a.family = AF_INET6;
+ a.data.ipv6 = r->address_record->data.aaaa.address;
+ break;
+
+ default:
+ g_assert(FALSE);
+ }
+
+ snprintf(sn, sizeof(sn), r->service_name);
+ snprintf(st, sizeof(st), r->service_type);
+
+ if ((i = strlen(sn)) > 0 && sn[i-1] == '.')
+ sn[i-1] = 0;
+
+ if ((i = strlen(st)) > 0 && st[i-1] == '.')
+ st[i-1] = 0;
+
+ r->callback(r, r->interface, r->protocol, event, sn, st, r->domain_name, r->srv_record->data.srv.name, &a, r->srv_record->data.srv.port, r->txt_record->data.txt.string_list, r->userdata);
+
+ }
+}
+
+static void record_browser_callback(AvahiRecordBrowser*rr, gint interface, guchar protocol, AvahiBrowserEvent event, AvahiRecord *record, gpointer userdata) {
+ AvahiServiceResolver *r = userdata;
+
+ g_assert(rr);
+ g_assert(record);
+ g_assert(r);
+
+ if (!(event == AVAHI_BROWSER_NEW))
+ return;
+
+ if (r->interface > 0 && interface != r->interface)
+ return;
+
+ if (r->protocol != AF_UNSPEC && protocol != r->protocol)
+ return;
+
+ if (r->interface <= 0)
+ r->interface = interface;
+
+ if (r->protocol == AF_UNSPEC)
+ r->protocol = protocol;
+
+ switch (record->key->type) {
+ case AVAHI_DNS_TYPE_SRV:
+ if (!r->srv_record) {
+ r->srv_record = avahi_record_ref(record);
+
+ g_assert(!r->record_browser_a && !r->record_browser_aaaa);
+
+ if (r->address_protocol == AF_INET || r->address_protocol == AF_UNSPEC) {
+ AvahiKey *k = avahi_key_new(r->srv_record->data.srv.name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_A);
+ r->record_browser_a = avahi_record_browser_new(r->server, r->interface, r->protocol, k, record_browser_callback, r);
+ avahi_key_unref(k);
+ }
+
+ if (r->address_protocol == AF_INET6 || r->address_protocol == AF_UNSPEC) {
+ AvahiKey *k = avahi_key_new(r->srv_record->data.srv.name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA);
+ r->record_browser_aaaa = avahi_record_browser_new(r->server, r->interface, r->protocol, k, record_browser_callback, r);
+ avahi_key_unref(k);
+ }
+ }
+ break;
+
+ case AVAHI_DNS_TYPE_TXT:
+ if (!r->txt_record)
+ r->txt_record = avahi_record_ref(record);
+ break;
+
+ case AVAHI_DNS_TYPE_A:
+ case AVAHI_DNS_TYPE_AAAA:
+ if (!r->address_record)
+ r->address_record = avahi_record_ref(record);
+ break;
+
+ default:
+ g_assert(FALSE);
+ }
+
+ if (r->txt_record && r->srv_record && r->address_record)
+ finish(r, AVAHI_RESOLVER_FOUND);
+}
+
+static void time_event_callback(AvahiTimeEvent *e, void *userdata) {
+ AvahiServiceResolver *r = userdata;
+
+ g_assert(e);
+ g_assert(r);
+
+ finish(r, AVAHI_RESOLVER_TIMEOUT);
+}
+
+AvahiServiceResolver *avahi_service_resolver_new(AvahiServer *server, gint interface, guchar protocol, const gchar *name, const gchar *type, const gchar *domain, guchar aprotocol, AvahiServiceResolverCallback callback, gpointer userdata) {
+ AvahiServiceResolver *r;
+ AvahiKey *k;
+ GTimeVal tv;
+ gchar t[256], *n;
+ size_t l;
+
+ g_assert(server);
+ g_assert(name);
+ g_assert(type);
+ g_assert(callback);
+
+ g_assert(aprotocol == AF_UNSPEC || aprotocol == AF_INET || aprotocol == AF_INET6);
+
+ r = g_new(AvahiServiceResolver, 1);
+ r->server = server;
+ r->service_name = avahi_normalize_name(name);
+ r->service_type = avahi_normalize_name(type);
+ r->domain_name = avahi_normalize_name(domain);
+ r->callback = callback;
+ r->userdata = userdata;
+ r->address_protocol = aprotocol;
+ r->srv_record = r->txt_record = r->address_record = NULL;
+ r->interface = interface;
+ r->protocol = protocol;
+
+ n = t;
+ l = sizeof(t);
+ avahi_escape_label((guint8*) name, strlen(name), &n, &l);
+ snprintf(n, l, ".%s%s", r->service_type, r->domain_name);
+
+ g_message("<%s>", t);
+
+ k = avahi_key_new(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_SRV);
+ r->record_browser_srv = avahi_record_browser_new(server, interface, protocol, k, record_browser_callback, r);
+ avahi_key_unref(k);
+
+ k = avahi_key_new(t, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_TXT);
+ r->record_browser_txt = avahi_record_browser_new(server, interface, protocol, k, record_browser_callback, r);
+ avahi_key_unref(k);
+
+ r->record_browser_a = r->record_browser_aaaa = NULL;
+
+ avahi_elapse_time(&tv, 1000, 0);
+ r->time_event = avahi_time_event_queue_add(server->time_event_queue, &tv, time_event_callback, r);
+
+ AVAHI_LLIST_PREPEND(AvahiServiceResolver, resolver, server->service_resolvers, r);
+
+ return r;
+}
+
+void avahi_service_resolver_free(AvahiServiceResolver *r) {
+ g_assert(r);
+
+ AVAHI_LLIST_REMOVE(AvahiServiceResolver, resolver, r->server->service_resolvers, r);
+
+ if (r->record_browser_srv)
+ avahi_record_browser_free(r->record_browser_srv);
+ if (r->record_browser_txt)
+ avahi_record_browser_free(r->record_browser_txt);
+ if (r->record_browser_a)
+ avahi_record_browser_free(r->record_browser_a);
+ if (r->record_browser_aaaa)
+ avahi_record_browser_free(r->record_browser_aaaa);
+
+ if (r->srv_record)
+ avahi_record_unref(r->srv_record);
+ if (r->txt_record)
+ avahi_record_unref(r->txt_record);
+ if (r->address_record)
+ avahi_record_unref(r->address_record);
+
+ g_free(r->service_name);
+ g_free(r->service_type);
+ g_free(r->domain_name);
+ g_free(r);
+}