--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/protocols/simple/srvresolve.c Tue Aug 02 20:24:51 2005 +0000
@@ -0,0 +1,109 @@
+/**
+ * @file simple.c
+ *
+ * gaim
+ *
+ * Copyright (C) 2005 Thomas Butter <butter@uni-mannheim.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "srvresolve.h"
+
+typedef union {
+ HEADER hdr;
+ u_char buf[1024];
+} queryans;
+
+struct getserver_return *getserver(const char *domain) {
+ static struct getserver_return ret;
+ queryans answer;
+ int size;
+ int qdcount;
+ int ancount;
+ gchar *end;
+ gchar *cp;
+ gchar name[256];
+ gchar *bestname = NULL;
+ int bestport = 5060;
+ int bestpri=99999;
+ int type, dlen, pref, weight, port;
+ gchar *query = g_strdup_printf("_sip._tcp.%s",domain);
+
+ gaim_debug_info("simple","searching for %s\r\n",domain);
+
+ size = res_query( query, C_IN, T_SRV, (u_char*)&answer, sizeof( answer));
+
+ g_free(query);
+
+ qdcount = ntohs(answer.hdr.qdcount);
+ ancount = ntohs(answer.hdr.ancount);
+
+ gaim_debug_info("simple","ancount %d\r\n",ancount);
+
+ cp = (char*)&answer + sizeof(HEADER);
+ end = (char*)&answer + size;
+
+ // skip over unwanted stuff
+ while (qdcount-- > 0 && cp < end) {
+ size = dn_expand( (char*)&answer, end, cp, name, 256);
+ if(size < 0) return NULL;
+ cp += size + QFIXEDSZ;
+ }
+
+ while (ancount-- > 0 && cp < end) {
+ size = dn_expand((char*)&answer, end, cp, name, 256);
+ if(size < 0)
+ return NULL;
+
+ cp += size;
+
+ NS_GET16(type,cp);
+ cp += 6; // skip ttl and class
+
+ NS_GET16(dlen,cp);
+
+ if (type == T_SRV) {
+ NS_GET16(pref,cp);
+
+ NS_GET16(weight, cp);
+
+ NS_GET16(port, cp);
+
+ size = dn_expand( (char*)&answer, end, cp, name, 256);
+ if(size < 0 )
+ return NULL;
+
+ cp += size;
+
+ if(pref<bestpri) {
+ if( bestname) g_free(bestname);
+ bestname = g_strdup(name);
+ bestpri = pref;
+ bestport = port;
+ }
+ } else {
+ cp += dlen;
+ }
+ }
+ if(bestpri < 99999) {
+ ret.name = bestname;
+ ret.port = bestport;
+ } else {
+ ret.name = g_strdup(domain);
+ ret.port = 5060;
+ }
+ return &ret;
+}