yang, ripngd: add 'frr-ripngd.yang' and associated stub callbacks

Introduce frr-ripngd.yang, which defines a model for managing the
FRR ripngd daemon.

Update the 'frr_yang_module_info' array of ripngd with the new
'frr-ripngd' module.

Add two new files (ripng_cli.[ch]) which should contain all ripngd
commands converted to the new northbound model. Centralizing all
commands in a single place will facilitate the process of moving
the CLI to a separate program in the future.

Add automatically generated stub callbacks in
ripng_northbound.c. These callbacks will be implemented gradually
in the following commits.

Add the confd.frr-ripngd.yang YANG module with annotations specific
to the ConfD daemon.

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

6 files changed, 704 insertions, 0 deletions

diff --git a/ripngd/ripng_cli.c b/ripngd/ripng_cli.c
new file mode 100644
index 0000000000..b033a39ac6
--- /dev/null
+++ b/ripngd/ripng_cli.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 1998 Kunihiro Ishiguro
+ * Copyright (C) 2018 NetDEF, Inc.
+ *                    Renato Westphal
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <zebra.h>
+
+#include "if.h"
+#include "vrf.h"
+#include "log.h"
+#include "prefix.h"
+#include "command.h"
+#include "northbound_cli.h"
+#include "libfrr.h"
+
+#include "ripngd/ripngd.h"
+#include "ripngd/ripng_cli.h"
+#ifndef VTYSH_EXTRACT_PL
+#include "ripngd/ripng_cli_clippy.c"
+#endif
+
+void ripng_cli_init(void)
+{
+}
diff --git a/ripngd/ripng_cli.h b/ripngd/ripng_cli.h
new file mode 100644
index 0000000000..a3f29b9859
--- /dev/null
+++ b/ripngd/ripng_cli.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 1998 Kunihiro Ishiguro
+ * Copyright (C) 2018 NetDEF, Inc.
+ *                    Renato Westphal
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef _FRR_RIPNG_CLI_H_
+#define _FRR_RIPNG_CLI_H_
+
+#endif /* _FRR_RIPNG_CLI_H_ */
diff --git a/ripngd/ripng_main.c b/ripngd/ripng_main.c
index 98df7ef12d..11d1266706 100644
--- a/ripngd/ripng_main.c
+++ b/ripngd/ripng_main.c
@@ -120,6 +120,7 @@ struct quagga_signal_t ripng_signals[] = {
 
 static const struct frr_yang_module_info *ripngd_yang_modules[] = {
 	&frr_interface_info,
+	&frr_ripngd_info,
 };
 
 FRR_DAEMON_INFO(ripngd, RIPNG, .vty_port = RIPNG_VTY_PORT,
@@ -177,6 +178,7 @@ int main(int argc, char **argv)
 
 	/* RIPngd inits. */
 	ripng_init();
+	ripng_cli_init();
 	zebra_init(master);
 	ripng_peer_init();
 
diff --git a/ripngd/ripng_northbound.c b/ripngd/ripng_northbound.c
new file mode 100644
index 0000000000..84e4bf43e7
--- /dev/null
+++ b/ripngd/ripng_northbound.c
@@ -0,0 +1,621 @@
+/*
+ * Copyright (C) 1998 Kunihiro Ishiguro
+ * Copyright (C) 2018 NetDEF, Inc.
+ *                    Renato Westphal
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <zebra.h>
+
+#include "if.h"
+#include "vrf.h"
+#include "log.h"
+#include "prefix.h"
+#include "table.h"
+#include "command.h"
+#include "routemap.h"
+#include "northbound.h"
+#include "libfrr.h"
+
+#include "ripngd/ripngd.h"
+#include "ripngd/ripng_cli.h"
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance
+ */
+static int ripngd_instance_create(enum nb_event event,
+				  const struct lyd_node *dnode,
+				  union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+static int ripngd_instance_delete(enum nb_event event,
+				  const struct lyd_node *dnode)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/allow-ecmp
+ */
+static int ripngd_instance_allow_ecmp_modify(enum nb_event event,
+					     const struct lyd_node *dnode,
+					     union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/default-information-originate
+ */
+static int ripngd_instance_default_information_originate_modify(
+	enum nb_event event, const struct lyd_node *dnode,
+	union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/default-metric
+ */
+static int ripngd_instance_default_metric_modify(enum nb_event event,
+						 const struct lyd_node *dnode,
+						 union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/network
+ */
+static int ripngd_instance_network_create(enum nb_event event,
+					  const struct lyd_node *dnode,
+					  union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+static int ripngd_instance_network_delete(enum nb_event event,
+					  const struct lyd_node *dnode)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/interface
+ */
+static int ripngd_instance_interface_create(enum nb_event event,
+					    const struct lyd_node *dnode,
+					    union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+static int ripngd_instance_interface_delete(enum nb_event event,
+					    const struct lyd_node *dnode)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/offset-list
+ */
+static int ripngd_instance_offset_list_create(enum nb_event event,
+					      const struct lyd_node *dnode,
+					      union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+static int ripngd_instance_offset_list_delete(enum nb_event event,
+					      const struct lyd_node *dnode)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/offset-list/access-list
+ */
+static int
+ripngd_instance_offset_list_access_list_modify(enum nb_event event,
+					       const struct lyd_node *dnode,
+					       union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/offset-list/metric
+ */
+static int
+ripngd_instance_offset_list_metric_modify(enum nb_event event,
+					  const struct lyd_node *dnode,
+					  union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/passive-interface
+ */
+static int
+ripngd_instance_passive_interface_create(enum nb_event event,
+					 const struct lyd_node *dnode,
+					 union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+static int
+ripngd_instance_passive_interface_delete(enum nb_event event,
+					 const struct lyd_node *dnode)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/redistribute
+ */
+static int ripngd_instance_redistribute_create(enum nb_event event,
+					       const struct lyd_node *dnode,
+					       union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+static int ripngd_instance_redistribute_delete(enum nb_event event,
+					       const struct lyd_node *dnode)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/redistribute/route-map
+ */
+static int
+ripngd_instance_redistribute_route_map_modify(enum nb_event event,
+					      const struct lyd_node *dnode,
+					      union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+static int
+ripngd_instance_redistribute_route_map_delete(enum nb_event event,
+					      const struct lyd_node *dnode)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/redistribute/metric
+ */
+static int
+ripngd_instance_redistribute_metric_modify(enum nb_event event,
+					   const struct lyd_node *dnode,
+					   union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+static int
+ripngd_instance_redistribute_metric_delete(enum nb_event event,
+					   const struct lyd_node *dnode)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/static-route
+ */
+static int ripngd_instance_static_route_create(enum nb_event event,
+					       const struct lyd_node *dnode,
+					       union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+static int ripngd_instance_static_route_delete(enum nb_event event,
+					       const struct lyd_node *dnode)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/aggregate-address
+ */
+static int
+ripngd_instance_aggregate_address_create(enum nb_event event,
+					 const struct lyd_node *dnode,
+					 union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+static int
+ripngd_instance_aggregate_address_delete(enum nb_event event,
+					 const struct lyd_node *dnode)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/timers/flush-interval
+ */
+static int
+ripngd_instance_timers_flush_interval_modify(enum nb_event event,
+					     const struct lyd_node *dnode,
+					     union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/timers/holddown-interval
+ */
+static int
+ripngd_instance_timers_holddown_interval_modify(enum nb_event event,
+						const struct lyd_node *dnode,
+						union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/instance/timers/update-interval
+ */
+static int
+ripngd_instance_timers_update_interval_modify(enum nb_event event,
+					      const struct lyd_node *dnode,
+					      union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/state/neighbors/neighbor
+ */
+static const void *
+ripngd_state_neighbors_neighbor_get_next(const void *parent_list_entry,
+					 const void *list_entry)
+{
+	/* TODO: implement me. */
+	return NULL;
+}
+
+static int ripngd_state_neighbors_neighbor_get_keys(const void *list_entry,
+						    struct yang_list_keys *keys)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+static const void *
+ripngd_state_neighbors_neighbor_lookup_entry(const void *parent_list_entry,
+					     const struct yang_list_keys *keys)
+{
+	/* TODO: implement me. */
+	return NULL;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/state/neighbors/neighbor/address
+ */
+static struct yang_data *
+ripngd_state_neighbors_neighbor_address_get_elem(const char *xpath,
+						 const void *list_entry)
+{
+	/* TODO: implement me. */
+	return NULL;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/state/neighbors/neighbor/last-update
+ */
+static struct yang_data *
+ripngd_state_neighbors_neighbor_last_update_get_elem(const char *xpath,
+						     const void *list_entry)
+{
+	/* TODO: implement me. */
+	return NULL;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/state/neighbors/neighbor/bad-packets-rcvd
+ */
+static struct yang_data *
+ripngd_state_neighbors_neighbor_bad_packets_rcvd_get_elem(
+	const char *xpath, const void *list_entry)
+{
+	/* TODO: implement me. */
+	return NULL;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/state/neighbors/neighbor/bad-routes-rcvd
+ */
+static struct yang_data *
+ripngd_state_neighbors_neighbor_bad_routes_rcvd_get_elem(const char *xpath,
+							 const void *list_entry)
+{
+	/* TODO: implement me. */
+	return NULL;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/state/routes/route
+ */
+static const void *
+ripngd_state_routes_route_get_next(const void *parent_list_entry,
+				   const void *list_entry)
+{
+	/* TODO: implement me. */
+	return NULL;
+}
+
+static int ripngd_state_routes_route_get_keys(const void *list_entry,
+					      struct yang_list_keys *keys)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+static const void *
+ripngd_state_routes_route_lookup_entry(const void *parent_list_entry,
+				       const struct yang_list_keys *keys)
+{
+	/* TODO: implement me. */
+	return NULL;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/state/routes/route/prefix
+ */
+static struct yang_data *
+ripngd_state_routes_route_prefix_get_elem(const char *xpath,
+					  const void *list_entry)
+{
+	/* TODO: implement me. */
+	return NULL;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/state/routes/route/next-hop
+ */
+static struct yang_data *
+ripngd_state_routes_route_next_hop_get_elem(const char *xpath,
+					    const void *list_entry)
+{
+	/* TODO: implement me. */
+	return NULL;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/state/routes/route/interface
+ */
+static struct yang_data *
+ripngd_state_routes_route_interface_get_elem(const char *xpath,
+					     const void *list_entry)
+{
+	/* TODO: implement me. */
+	return NULL;
+}
+
+/*
+ * XPath: /frr-ripngd:ripngd/state/routes/route/metric
+ */
+static struct yang_data *
+ripngd_state_routes_route_metric_get_elem(const char *xpath,
+					  const void *list_entry)
+{
+	/* TODO: implement me. */
+	return NULL;
+}
+
+/*
+ * XPath: /frr-ripngd:clear-ripng-route
+ */
+static int clear_ripng_route_rpc(const char *xpath, const struct list *input,
+				 struct list *output)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/*
+ * XPath: /frr-interface:lib/interface/frr-ripngd:ripng/split-horizon
+ */
+static int
+lib_interface_ripng_split_horizon_modify(enum nb_event event,
+					 const struct lyd_node *dnode,
+					 union nb_resource *resource)
+{
+	/* TODO: implement me. */
+	return NB_OK;
+}
+
+/* clang-format off */
+const struct frr_yang_module_info frr_ripngd_info = {
+	.name = "frr-ripngd",
+	.nodes = {
+		{
+			.xpath = "/frr-ripngd:ripngd/instance",
+			.cbs.create = ripngd_instance_create,
+			.cbs.delete = ripngd_instance_delete,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/allow-ecmp",
+			.cbs.modify = ripngd_instance_allow_ecmp_modify,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/default-information-originate",
+			.cbs.modify = ripngd_instance_default_information_originate_modify,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/default-metric",
+			.cbs.modify = ripngd_instance_default_metric_modify,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/network",
+			.cbs.create = ripngd_instance_network_create,
+			.cbs.delete = ripngd_instance_network_delete,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/interface",
+			.cbs.create = ripngd_instance_interface_create,
+			.cbs.delete = ripngd_instance_interface_delete,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/offset-list",
+			.cbs.create = ripngd_instance_offset_list_create,
+			.cbs.delete = ripngd_instance_offset_list_delete,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/offset-list/access-list",
+			.cbs.modify = ripngd_instance_offset_list_access_list_modify,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/offset-list/metric",
+			.cbs.modify = ripngd_instance_offset_list_metric_modify,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/passive-interface",
+			.cbs.create = ripngd_instance_passive_interface_create,
+			.cbs.delete = ripngd_instance_passive_interface_delete,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/redistribute",
+			.cbs.create = ripngd_instance_redistribute_create,
+			.cbs.delete = ripngd_instance_redistribute_delete,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/redistribute/route-map",
+			.cbs.modify = ripngd_instance_redistribute_route_map_modify,
+			.cbs.delete = ripngd_instance_redistribute_route_map_delete,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/redistribute/metric",
+			.cbs.modify = ripngd_instance_redistribute_metric_modify,
+			.cbs.delete = ripngd_instance_redistribute_metric_delete,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/static-route",
+			.cbs.create = ripngd_instance_static_route_create,
+			.cbs.delete = ripngd_instance_static_route_delete,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/aggregate-address",
+			.cbs.create = ripngd_instance_aggregate_address_create,
+			.cbs.delete = ripngd_instance_aggregate_address_delete,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/timers/flush-interval",
+			.cbs.modify = ripngd_instance_timers_flush_interval_modify,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/timers/holddown-interval",
+			.cbs.modify = ripngd_instance_timers_holddown_interval_modify,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/instance/timers/update-interval",
+			.cbs.modify = ripngd_instance_timers_update_interval_modify,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/state/neighbors/neighbor",
+			.cbs.get_next = ripngd_state_neighbors_neighbor_get_next,
+			.cbs.get_keys = ripngd_state_neighbors_neighbor_get_keys,
+			.cbs.lookup_entry = ripngd_state_neighbors_neighbor_lookup_entry,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/state/neighbors/neighbor/address",
+			.cbs.get_elem = ripngd_state_neighbors_neighbor_address_get_elem,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/state/neighbors/neighbor/last-update",
+			.cbs.get_elem = ripngd_state_neighbors_neighbor_last_update_get_elem,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/state/neighbors/neighbor/bad-packets-rcvd",
+			.cbs.get_elem = ripngd_state_neighbors_neighbor_bad_packets_rcvd_get_elem,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/state/neighbors/neighbor/bad-routes-rcvd",
+			.cbs.get_elem = ripngd_state_neighbors_neighbor_bad_routes_rcvd_get_elem,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/state/routes/route",
+			.cbs.get_next = ripngd_state_routes_route_get_next,
+			.cbs.get_keys = ripngd_state_routes_route_get_keys,
+			.cbs.lookup_entry = ripngd_state_routes_route_lookup_entry,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/state/routes/route/prefix",
+			.cbs.get_elem = ripngd_state_routes_route_prefix_get_elem,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/state/routes/route/next-hop",
+			.cbs.get_elem = ripngd_state_routes_route_next_hop_get_elem,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/state/routes/route/interface",
+			.cbs.get_elem = ripngd_state_routes_route_interface_get_elem,
+		},
+		{
+			.xpath = "/frr-ripngd:ripngd/state/routes/route/metric",
+			.cbs.get_elem = ripngd_state_routes_route_metric_get_elem,
+		},
+		{
+			.xpath = "/frr-ripngd:clear-ripng-route",
+			.cbs.rpc = clear_ripng_route_rpc,
+		},
+		{
+			.xpath = "/frr-interface:lib/interface/frr-ripngd:ripng/split-horizon",
+			.cbs.modify = lib_interface_ripng_split_horizon_modify,
+		},
+		{
+			.xpath = NULL,
+		},
+	}
+};
diff --git a/ripngd/ripngd.h b/ripngd/ripngd.h
index 1095a33494..7d4f822da4 100644
--- a/ripngd/ripngd.h
+++ b/ripngd/ripngd.h
@@ -89,6 +89,10 @@
 #define IFMINMTU    576
 #endif /* IFMINMTU */
 
+/* YANG paths */
+#define RIPNG_INSTANCE	"/frr-ripngd:ripngd/instance"
+#define RIPNG_IFACE	"/frr-interface:lib/interface/frr-ripngd:ripng"
+
 /* RIPng structure. */
 struct ripng {
 	/* RIPng socket. */
@@ -412,4 +416,8 @@ extern struct ripng_info *ripng_ecmp_add(struct ripng_info *);
 extern struct ripng_info *ripng_ecmp_replace(struct ripng_info *);
 extern struct ripng_info *ripng_ecmp_delete(struct ripng_info *);
 
+/* Northbound. */
+extern void ripng_cli_init(void);
+extern const struct frr_yang_module_info frr_ripngd_info;
+
 #endif /* _ZEBRA_RIPNG_RIPNGD_H */
diff --git a/ripngd/subdir.am b/ripngd/subdir.am
index 8f834a1d29..25d72e5c5f 100644
--- a/ripngd/subdir.am
+++ b/ripngd/subdir.am
@@ -6,6 +6,7 @@ if RIPNGD
 noinst_LIBRARIES += ripngd/libripng.a
 sbin_PROGRAMS += ripngd/ripngd
 vtysh_scan += \
+	$(top_srcdir)/ripngd/ripng_cli.c \
 	$(top_srcdir)/ripngd/ripng_debug.c \
 	$(top_srcdir)/ripngd/ripng_interface.c \
 	$(top_srcdir)/ripngd/ripng_offset.c \
@@ -16,11 +17,13 @@ man8 += $(MANBUILD)/ripngd.8
 endif
 
 ripngd_libripng_a_SOURCES = \
+	ripngd/ripng_cli.c \
 	ripngd/ripng_debug.c \
 	ripngd/ripng_interface.c \
 	ripngd/ripng_memory.c \
 	ripngd/ripng_nexthop.c \
 	ripngd/ripng_offset.c \
+	ripngd/ripng_northbound.c \
 	ripngd/ripng_peer.c \
 	ripngd/ripng_route.c \
 	ripngd/ripng_routemap.c \
@@ -28,7 +31,11 @@ ripngd_libripng_a_SOURCES = \
 	ripngd/ripngd.c \
 	# end
 
+ripngd/ripng_cli_clippy.c: $(CLIPPY_DEPS)
+ripngd/ripng_cli.$(OBJEXT): ripngd/ripng_cli_clippy.c
+
 noinst_HEADERS += \
+	ripngd/ripng_cli.h \
 	ripngd/ripng_debug.h \
 	ripngd/ripng_memory.h \
 	ripngd/ripng_nexthop.h \
@@ -40,5 +47,8 @@ ripngd_ripngd_LDADD = ripngd/libripng.a lib/libfrr.la @LIBCAP@
 ripngd_ripngd_SOURCES = \
 	ripngd/ripng_main.c \
 	# end
+nodist_ripngd_ripngd_SOURCES = \
+	yang/frr-ripngd.yang.c \
+	# end
 
 dist_examples_DATA += ripngd/ripngd.conf.sample