mgcp_client: add logging on received MGCP messages

There is verbose debug logging on MGCP messages sent out to the MGW, but
none on received MGCP messages. Add Rx logging.

Related: SYS#5529
Change-Id: Id76230896aa87c1a12bd5ad87a62430c048a2873
diff --git a/src/libosmo-mgcp-client/mgcp_client.c b/src/libosmo-mgcp-client/mgcp_client.c
index 8e6780e..9d60ee8 100644
--- a/src/libosmo-mgcp-client/mgcp_client.c
+++ b/src/libosmo-mgcp-client/mgcp_client.c
@@ -677,6 +677,9 @@
 		goto error;
 	}
 
+	LOGP(DLMGCP, LOGL_DEBUG, "MGCP client: Rx %d %u %s\n",
+	     r->head.response_code, r->head.trans_id, r->head.comment);
+
 	rc = parse_head_params(r);
 	if (rc) {
 		LOGP(DLMGCP, LOGL_ERROR, "Cannot parse MGCP response (head parameters)\n");
diff --git a/tests/mgcp_client/mgcp_client_test.err b/tests/mgcp_client/mgcp_client_test.err
index 80119cb..e7db23c 100644
--- a/tests/mgcp_client/mgcp_client_test.err
+++ b/tests/mgcp_client/mgcp_client_test.err
@@ -10,6 +10,7 @@
 - cancel succeeds
 DLMGCP Canceled transaction 1
 - late response gets discarded
+DLMGCP MGCP client: Rx 200 1 OK
 DLMGCP Cannot find matching MGCP transaction for trans_id 1
 - canceling again does nothing
 DLMGCP Cannot cancel, no such transaction: 1