* implement AvahiServiceBrowser

git-svn-id: file:///home/lennart/svn/public/avahi/trunk@87 941a03a8-eaeb-0310-b9a0-b1bbd8fe43fe

1 files changed, 123 insertions, 0 deletions

diff --git a/avahi-core/browse-service.c b/avahi-core/browse-service.c
new file mode 100644
index 0000000..10b3f33
--- /dev/null
+++ b/avahi-core/browse-service.c
@@ -0,0 +1,123 @@
+/* $Id$ */
+
+/***
+  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 AvahiServiceBrowser {
+    AvahiServer *server;
+    gchar *domain_name;
+    gchar *service_type;
+    
+    AvahiRecordBrowser *record_browser;
+
+    AvahiServiceBrowserCallback callback;
+    gpointer userdata;
+
+    AVAHI_LLIST_FIELDS(AvahiServiceBrowser, browser);
+};
+
+static void record_browser_callback(AvahiRecordBrowser*rr, gint interface, guchar protocol, AvahiBrowserEvent event, AvahiRecord *record, gpointer userdata) {
+    AvahiServiceBrowser *b = userdata;
+    gchar *n, *e, *c, *s;
+    gchar service[128];
+
+    g_assert(rr);
+    g_assert(record);
+    g_assert(b);
+
+    g_assert(record->key->type == AVAHI_DNS_TYPE_PTR);
+
+    c = n = avahi_normalize_name(record->data.ptr.name);
+
+    if (!(avahi_unescape_label((const gchar**) &c, service, sizeof(service))))
+        goto fail;
+
+    for (s = e = c; *c == '_';) {
+        c += strcspn(c, ".");
+
+        if (*c == 0)
+            goto fail;
+
+        g_assert(*c == '.');
+        e = c;
+        c++;
+    }
+
+    *e = 0;
+
+    if (!avahi_domain_equal(c, b->domain_name))
+        goto fail;
+    
+    b->callback(b, interface, protocol, event, service, s, c, b->userdata);
+    g_free(n);
+
+    return;
+
+fail:
+    g_warning("Invalid service '%s'", n);
+    g_free(n);
+}
+
+AvahiServiceBrowser *avahi_service_browser_new(AvahiServer *server, gint interface, guchar protocol, const gchar *service_type, const gchar *domain, AvahiServiceBrowserCallback callback, gpointer userdata) {
+    AvahiServiceBrowser *b;
+    AvahiKey *k;
+    gchar *n = NULL;
+    
+    g_assert(server);
+    g_assert(callback);
+    g_assert(service_type);
+
+    b = g_new(AvahiServiceBrowser, 1);
+    b->server = server;
+    b->domain_name = avahi_normalize_name(domain ? domain : "local.");
+    b->service_type = avahi_normalize_name(service_type);
+    b->callback = callback;
+    b->userdata = userdata;
+
+    n = g_strdup_printf("%s%s", b->service_type, b->domain_name);
+    k = avahi_key_new(n, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_PTR);
+    g_free(n);
+    
+    b->record_browser = avahi_record_browser_new(server, interface, protocol, k, record_browser_callback, b);
+    avahi_key_unref(k);
+
+    AVAHI_LLIST_PREPEND(AvahiServiceBrowser, browser, server->service_browsers, b);
+    
+    return b;
+}
+
+void avahi_service_browser_free(AvahiServiceBrowser *b) {
+    g_assert(b);
+
+    AVAHI_LLIST_REMOVE(AvahiServiceBrowser, browser, b->server->service_browsers, b);
+
+    avahi_record_browser_free(b->record_browser);
+    g_free(b->domain_name);
+    g_free(b->service_type);
+    g_free(b);
+}