ripd: retrofit the 'allow-ecmp' command to the new northbound model

Trivial conversion. The rip->ecmp variable was converted to a boolean to
match the way it's defined in the YANG module.

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>

ripd/rip_cli.c

@@ -85,8 +85,39 @@ void cli_show_router_rip(struct vty *vty, struct lyd_node *dnode,
 	vty_out(vty, "router rip\n");
 }
 
+/*
+ * XPath: /frr-ripd:ripd/instance/allow-ecmp
+ */
+DEFPY (rip_allow_ecmp,
+       rip_allow_ecmp_cmd,
+       "[no] allow-ecmp",
+       NO_STR
+       "Allow Equal Cost MultiPath\n")
+{
+	struct cli_config_change changes[] = {
+		{
+			.xpath = "./allow-ecmp",
+			.operation = NB_OP_MODIFY,
+			.value = no ? "false" : "true",
+		},
+	};
+
+	return nb_cli_cfg_change(vty, NULL, changes, array_size(changes));
+}
+
+void cli_show_rip_allow_ecmp(struct vty *vty, struct lyd_node *dnode,
+			     bool show_defaults)
+{
+	if (!yang_dnode_get_bool(dnode, NULL))
+		vty_out(vty, " no");
+
+	vty_out(vty, " allow-ecmp\n");
+}
+
 void rip_cli_init(void)
 {
 	install_element(CONFIG_NODE, &router_rip_cmd);
 	install_element(CONFIG_NODE, &no_router_rip_cmd);
+
+	install_element(RIP_NODE, &rip_allow_ecmp_cmd);
 }

ripd/rip_cli.h

@@ -23,5 +23,7 @@
 
 extern void cli_show_router_rip(struct vty *vty, struct lyd_node *dnode,
 				bool show_defaults);
+extern void cli_show_rip_allow_ecmp(struct vty *vty, struct lyd_node *dnode,
+				    bool show_defaults);
 
 #endif /* _FRR_RIP_CLI_H_ */

ripd/rip_northbound.c

@@ -81,7 +81,13 @@ static int ripd_instance_allow_ecmp_modify(enum nb_event event,
 					   const struct lyd_node *dnode,
 					   union nb_resource *resource)
 {
-	/* TODO: implement me. */
+	if (event != NB_EV_APPLY)
+		return NB_OK;
+
+	rip->ecmp = yang_dnode_get_bool(dnode, NULL);
+	if (!rip->ecmp)
+		rip_ecmp_disable();
+
 	return NB_OK;
 }
 
@@ -722,6 +728,7 @@ const struct frr_yang_module_info frr_ripd_info = {
 		{
 			.xpath = "/frr-ripd:ripd/instance/allow-ecmp",
 			.cbs.modify = ripd_instance_allow_ecmp_modify,
+			.cbs.cli_show = cli_show_rip_allow_ecmp,
 		},
 		{
 			.xpath = "/frr-ripd:ripd/instance/default-information-originate",

ripd/ripd.c

@@ -3290,7 +3290,7 @@ DEFUN (no_rip_distance_source_access_list,
 }
 
 /* Update ECMP routes to zebra when ECMP is disabled. */
-static void rip_ecmp_disable(void)
+void rip_ecmp_disable(void)
 {
 	struct route_node *rp;
 	struct rip_info *rinfo, *tmp_rinfo;
@@ -3327,38 +3327,6 @@ static void rip_ecmp_disable(void)
 		}
 }
 
-DEFUN (rip_allow_ecmp,
-       rip_allow_ecmp_cmd,
-       "allow-ecmp",
-       "Allow Equal Cost MultiPath\n")
-{
-	if (rip->ecmp) {
-		vty_out(vty, "ECMP is already enabled.\n");
-		return CMD_WARNING;
-	}
-
-	rip->ecmp = 1;
-	zlog_info("ECMP is enabled.");
-	return CMD_SUCCESS;
-}
-
-DEFUN (no_rip_allow_ecmp,
-       no_rip_allow_ecmp_cmd,
-       "no allow-ecmp",
-       NO_STR
-       "Allow Equal Cost MultiPath\n")
-{
-	if (!rip->ecmp) {
-		vty_out(vty, "ECMP is already disabled.\n");
-		return CMD_WARNING;
-	}
-
-	rip->ecmp = 0;
-	zlog_info("ECMP is disabled.");
-	rip_ecmp_disable();
-	return CMD_SUCCESS;
-}
-
 /* Print out routes update time. */
 static void rip_vty_out_uptime(struct vty *vty, struct rip_info *rinfo)
 {
@@ -3684,10 +3652,6 @@ static int config_write_rip(struct vty *vty)
 						? rdistance->access_list
 						: "");
 
-		/* ECMP configuration. */
-		if (rip->ecmp)
-			vty_out(vty, " allow-ecmp\n");
-
 		/* RIP static route configuration. */
 		for (rn = route_top(rip->route); rn; rn = route_next(rn))
 			if (rn->info)
@@ -3982,8 +3946,6 @@ void rip_init(void)
 	install_element(RIP_NODE, &no_rip_distance_source_cmd);
 	install_element(RIP_NODE, &rip_distance_source_access_list_cmd);
 	install_element(RIP_NODE, &no_rip_distance_source_access_list_cmd);
-	install_element(RIP_NODE, &rip_allow_ecmp_cmd);
-	install_element(RIP_NODE, &no_rip_allow_ecmp_cmd);
 
 	/* Debug related init. */
 	rip_debug_init();

ripd/ripd.h

@@ -151,7 +151,7 @@ struct rip {
 	struct route_table *distance_table;
 
 	/* RIP ECMP flag */
-	unsigned int ecmp;
+	bool ecmp;
 
 	/* For redistribute route map. */
 	struct {
@@ -389,6 +389,8 @@ extern int rip_request_send(struct sockaddr_in *, struct interface *, uint8_t,
 			    struct connected *);
 extern int rip_neighbor_lookup(struct sockaddr_in *);
 
+extern void rip_ecmp_disable(void);
+
 extern int rip_create_socket(void);
 
 extern int rip_redistribute_check(int);