vtysh: use parent_node for vtysh_exit()

Cleaning up the whole mess of "exit" and "quit" commands that follows is
left for a rainy day :(

Signed-off-by: David Lamparter <equinox@diac24.net>

vtysh/vtysh.c

@@ -1992,85 +1992,19 @@ DEFUNSH(VTYSH_REALLYALL, vtysh_config_terminal, vtysh_config_terminal_cmd,
 
 static int vtysh_exit(struct vty *vty)
 {
-	switch (vty->node) {
-	case VIEW_NODE:
-	case ENABLE_NODE:
+	struct cmd_node *cnode = vector_lookup(cmdvec, vty->node);
+
+	if (vty->node == VIEW_NODE || vty->node == ENABLE_NODE)
 		exit(0);
-		break;
-	case CONFIG_NODE:
-		vty->node = ENABLE_NODE;
-		break;
-	case INTERFACE_NODE:
-	case PW_NODE:
-	case VRF_NODE:
-	case NH_GROUP_NODE:
-	case ZEBRA_NODE:
-	case BGP_NODE:
-	case RIP_NODE:
-	case RIPNG_NODE:
-	case OSPF_NODE:
-	case OSPF6_NODE:
-	case EIGRP_NODE:
-	case BABEL_NODE:
-	case LDP_NODE:
-	case LDP_L2VPN_NODE:
-	case ISIS_NODE:
-	case OPENFABRIC_NODE:
-	case RMAP_NODE:
-	case PBRMAP_NODE:
-	case VTY_NODE:
-	case KEYCHAIN_NODE:
-	case BFD_NODE:
-	case RPKI_NODE:
+	if (cnode->node_exit)
+		cnode->node_exit(vty);
+	if (cnode->parent_node)
+		vty->node = cnode->parent_node;
+
+	if (vty->node == CONFIG_NODE) {
+		/* resync in case one of the daemons is somewhere else */
 		vtysh_execute("end");
 		vtysh_execute("configure");
-		vty->node = CONFIG_NODE;
-		break;
-	case BGP_VPNV4_NODE:
-	case BGP_VPNV6_NODE:
-	case BGP_IPV4_NODE:
-	case BGP_IPV4M_NODE:
-	case BGP_IPV4L_NODE:
-	case BGP_IPV6_NODE:
-	case BGP_IPV6M_NODE:
-	case BGP_IPV6L_NODE:
-	case BGP_FLOWSPECV4_NODE:
-	case BGP_FLOWSPECV6_NODE:
-	case BGP_VRF_POLICY_NODE:
-	case BGP_EVPN_NODE:
-	case BGP_VNC_DEFAULTS_NODE:
-	case BGP_VNC_NVE_GROUP_NODE:
-	case BGP_VNC_L2_GROUP_NODE:
-	case BMP_NODE:
-		vty->node = BGP_NODE;
-		break;
-	case BGP_EVPN_VNI_NODE:
-		vty->node = BGP_EVPN_NODE;
-		break;
-	case LDP_IPV4_NODE:
-	case LDP_IPV6_NODE:
-		vty->node = LDP_NODE;
-		break;
-	case LDP_IPV4_IFACE_NODE:
-		vty->node = LDP_IPV4_NODE;
-		break;
-	case LDP_IPV6_IFACE_NODE:
-		vty->node = LDP_IPV6_NODE;
-		break;
-	case LDP_PSEUDOWIRE_NODE:
-		vty->node = LDP_L2VPN_NODE;
-		break;
-	case KEYCHAIN_KEY_NODE:
-		vty->node = KEYCHAIN_NODE;
-		break;
-	case LINK_PARAMS_NODE:
-		vty->node = INTERFACE_NODE;
-		break;
-	case BFD_PEER_NODE:
-		vty->node = BFD_NODE;
-		break;
-	default:
-		break;
 	}
 	return CMD_SUCCESS;
 }