mgcp-client: Mark client as UP when keepalive request-interval/timeout is disabled through VTY

This way if keepalive becomes disabled for an MGW, it can be selected
again (otherwise it would become non-selectable forever, and we already
have a "blocked" config for that).

Fixes: 563386e8bbf0bc6d9050d87f79208d6784e219cf
Related: SYS#6481
Change-Id: I263d23885a1a967f844033f9810b96691b8e3b30
diff --git a/src/libosmo-mgcp-client/mgcp_client_vty.c b/src/libosmo-mgcp-client/mgcp_client_vty.c
index a164637..d57447c 100644
--- a/src/libosmo-mgcp-client/mgcp_client_vty.c
+++ b/src/libosmo-mgcp-client/mgcp_client_vty.c
@@ -323,10 +323,15 @@
 	/* If client already exists, apply the change immediately if possible: */
 	mgcp->actual.keepalive.req_interval_sec = atoi(argv[0]);
 	if (mgcp->wq.bfd.fd != -1) { /* UDP MGCP socket connected */
-		if (mgcp->actual.keepalive.req_interval_sec > 0) /* Re-schedule: */
+		if (mgcp->actual.keepalive.req_interval_sec > 0) {
+			/* Re-schedule: */
 			osmo_timer_schedule(&mgcp->keepalive_tx_timer, mgcp->actual.keepalive.req_interval_sec, 0);
-		else if (osmo_timer_pending(&mgcp->keepalive_tx_timer))
-			osmo_timer_del(&mgcp->keepalive_tx_timer);
+		} else {
+			if (osmo_timer_pending(&mgcp->keepalive_tx_timer))
+				osmo_timer_del(&mgcp->keepalive_tx_timer);
+			/* Assume link is UP by default, so that this MGW can be selected: */
+			mgcp->conn_up = true;
+		}
 	} /* else: wait until connect() to do first scheduling */
 
 	return CMD_SUCCESS;
@@ -371,10 +376,15 @@
 	/* If client already exists, apply the change immediately if possible: */
 	mgcp->actual.keepalive.timeout_sec = atoi(argv[0]);
 	if (mgcp->wq.bfd.fd != -1) { /* UDP MGCP socket connected */
-		if (mgcp->actual.keepalive.timeout_sec > 0) /* Re-schedule: */
+		if (mgcp->actual.keepalive.timeout_sec > 0) {
+			/* Re-schedule: */
 			osmo_timer_schedule(&mgcp->keepalive_rx_timer, mgcp->actual.keepalive.timeout_sec, 0);
-		else if (osmo_timer_pending(&mgcp->keepalive_rx_timer))
-			osmo_timer_del(&mgcp->keepalive_rx_timer);
+		} else {
+			if (osmo_timer_pending(&mgcp->keepalive_rx_timer))
+				osmo_timer_del(&mgcp->keepalive_rx_timer);
+			/* Assume link is UP by default, so that this MGW can be selected: */
+			mgcp->conn_up = true;
+		}
 	} /* else: wait until connect() to do first scheduling */
 
 	return CMD_SUCCESS;