Index: channels/chan_sip.c
===================================================================
--- channels/chan_sip.c	(révision 295998)
+++ channels/chan_sip.c	(copie de travail)
@@ -7721,6 +7721,7 @@
 	ast_copy_string(buf, value, sizeof(buf));
 
 	sip_parse_host(buf, lineno, &username, &portnum, &transport);
+	printf("mwi= %s / %s\n", buf, username);
 	
 	if ((hostname = strrchr(username, '@'))) {
 		*hostname++ = '\0';
@@ -25251,6 +25252,16 @@
 	/* Divvy up the items separated by slashes */
 	AST_NONSTANDARD_APP_ARGS(args, tmp, '/');
 
+	if(args.peerorhost == NULL) {
+		dialog_unlink_all(p, TRUE, TRUE);
+		dialog_unref(p, "unref dialog p from mem fail");
+		/* sip_destroy(p); */
+		ast_log(LOG_ERROR, "SIP resource name is not set or empty");
+
+		*cause = AST_CAUSE_CHANNEL_UNACCEPTABLE;
+		return NULL;
+	}
+
 	/* Find at sign - @ */
 	host = strchr(args.peerorhost, '@');
 	if (host) {