--- a/mncc/extsock.c	Tue Jun 28 19:21:51 2022 -0800
+++ b/mncc/extsock.c	Tue Jun 28 21:47:04 2022 -0800
@@ -17,6 +17,8 @@
 #include "struct.h"
 #include "gsm_call.h"
 
+extern char *mncc_msg_name();
+
 void
 extsock_dec_refcount(conn)
 	struct socket_conn *conn;
@@ -52,6 +54,9 @@
 		if (call->gc_flag)
 			continue;
 		if (call->socket == conn) {
+			syslog(LOG_WARNING,
+	"clearing broken socket call: GSM callref 0x%x, socket ref 0x%x",
+				call->callref, call->socket_ref);
 			send_rel_on_broken_socket(call);
 			extsock_dec_refcount(conn);
 			call->gc_flag = 1;
@@ -85,6 +90,8 @@
 		report_runt(msg);
 		return;
 	}
+	syslog(LOG_DEBUG, "Rx MNCC_SETUP_REQ from socket, callref=0x%x",
+		msg->callref);
 	call = find_socket_call(conn, msg->callref);
 	if (call) {
 		syslog(LOG_ERR,
@@ -109,6 +116,8 @@
 		report_runt(msg);
 		return;
 	}
+	syslog(LOG_DEBUG, "Rx %s from socket, callref=0x%x",
+		mncc_msg_name(msg->msg_type), msg->callref);
 	call = find_socket_call(conn, msg->callref);
 	if (!call) {
 		syslog(LOG_ERR,
@@ -138,6 +147,8 @@
 		report_runt(msg);
 		return;
 	}
+	syslog(LOG_DEBUG, "Rx %s from socket, callref=0x%x",
+		mncc_msg_name(msg->msg_type), msg->callref);
 	call = find_socket_call(conn, msg->callref);
 	if (!call) {
 		syslog(LOG_ERR,
@@ -160,8 +171,11 @@
 
 	rc = recv(conn->fd, &msg, sizeof msg, 0);
 	if (rc < 4) {
-		if (conn->ncalls)
+		if (conn->ncalls) {
+			syslog(LOG_ERR, "ext socket broken with calls present");
 			broken_socket_clear_calls(conn);
+		} else
+			syslog(LOG_INFO, "normal closing of ext socket");
 		close(conn->fd);
 		conn->fd = -1;
 		return;