*: 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, 22 insertions, 0 deletions

diff --git a/pathd/path_cli.c b/pathd/path_cli.c
index 68baa61fa9..bd629a2b70 100644
--- a/pathd/path_cli.c
+++ b/pathd/path_cli.c
@@ -305,6 +305,11 @@ void cli_show_srte_segment_list(struct vty *vty, struct lyd_node *dnode,
 		yang_dnode_get_string(dnode, "./name"));
 }
 
+void cli_show_srte_segment_list_end(struct vty *vty, struct lyd_node *dnode)
+{
+	vty_out(vty, "  exit\n");
+}
+
 static int segment_list_has_src_dst(
 	struct vty *vty, char *xpath, long index, const char *index_str,
 	struct in_addr adj_src_ipv4, struct in_addr adj_dst_ipv4,
@@ -662,6 +667,11 @@ void cli_show_srte_policy(struct vty *vty, struct lyd_node *dnode,
 		yang_dnode_get_string(dnode, "./endpoint"));
 }
 
+void cli_show_srte_policy_end(struct vty *vty, struct lyd_node *dnode)
+{
+	vty_out(vty, "  exit\n");
+}
+
 /*
  * XPath: /frr-pathd:pathd/srte/policy/name
  */
@@ -1233,6 +1243,15 @@ void cli_show_srte_policy_candidate_path(struct vty *vty,
 	}
 }
 
+void cli_show_srte_policy_candidate_path_end(struct vty *vty,
+					     struct lyd_node *dnode)
+{
+	const char *type = yang_dnode_get_string(dnode, "./type");
+
+	if (strmatch(type, "dynamic"))
+		vty_out(vty, "   exit\n");
+}
+
 static int config_write_dnode(const struct lyd_node *dnode, void *arg)
 {
 	struct vty *vty = arg;
@@ -1256,6 +1275,9 @@ int config_write_segment_routing(struct vty *vty)
 
 	hook_call(pathd_srte_config_write, vty);
 
+	vty_out(vty, " exit\n");
+	vty_out(vty, "exit\n");
+
 	return 1;
 }