*: explicitly print "exit" at the end of every node config

There is a possibility that the same line can be matched as a command in
some node and its parent node. In this case, when reading the config,
this line is always executed as a command of the child node.

For example, with the following config:
```
router ospf
 network 193.168.0.0/16 area 0
!
mpls ldp
 discovery hello interval 111
!
```
Line `mpls ldp` is processed as command `mpls ldp-sync` inside the
`router ospf` node. This leads to a complete loss of `mpls ldp` node
configuration.

To eliminate this issue and all possible similar issues, let's print an
explicit "exit" at the end of every node config.

This commit also changes indentation for a couple of existing exit
commands so that all existing commands are on the same level as their
corresponding node-entering commands.

Fixes #9206.

Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/pbrd/pbr_vty.c b/pbrd/pbr_vty.c
index 2936d1e34..6c007acb5 100644
--- a/pbrd/pbr_vty.c
+++ b/pbrd/pbr_vty.c
@@ -1118,7 +1118,7 @@ static int pbr_interface_config_write(struct vty *vty)
 
 			pbr_map_write_interfaces(vty, ifp);
 
-			vty_endframe(vty, "!\n");
+			vty_endframe(vty, "exit\n!\n");
 		}
 	}
 
@@ -1184,6 +1184,7 @@ static int pbr_vty_map_config_write_sequence(struct vty *vty,
 		pbrms_nexthop_group_write_individual_nexthop(vty, pbrms);
 	}
 
+	vty_out(vty, "exit\n");
 	vty_out(vty, "!\n");
 	return 1;
 }