From a8bf8fb851481a78a7991a265cdb9821fd3479f8 Mon Sep 17 00:00:00 2001
From: Renato Westphal <renato@opensourcerouting.org>
Date: Thu, 29 Nov 2018 16:41:32 -0200
Subject: [PATCH] ripngd: implement northbound callbacks to fetch neighbor
 information

The "neighbors" YANG container was copied and adapted from the
ietf-rip module.

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
---
 ripngd/ripng_northbound.c | 50 ++++++++++++++++++++++++++++++---------
 ripngd/ripngd.h           |  1 +
 2 files changed, 40 insertions(+), 11 deletions(-)

diff --git a/ripngd/ripng_northbound.c b/ripngd/ripng_northbound.c
index 6ec80982be..ad727582dd 100644
--- a/ripngd/ripng_northbound.c
+++ b/ripngd/ripng_northbound.c
@@ -579,14 +579,26 @@ static const void *
 ripngd_state_neighbors_neighbor_get_next(const void *parent_list_entry,
 					 const void *list_entry)
 {
-	/* TODO: implement me. */
-	return NULL;
+	struct listnode *node;
+
+	if (list_entry == NULL)
+		node = listhead(peer_list);
+	else
+		node = listnextnode((struct listnode *)list_entry);
+
+	return node;
 }
 
 static int ripngd_state_neighbors_neighbor_get_keys(const void *list_entry,
 						    struct yang_list_keys *keys)
 {
-	/* TODO: implement me. */
+	const struct listnode *node = list_entry;
+	const struct ripng_peer *peer = listgetdata(node);
+
+	keys->num = 1;
+	(void)inet_ntop(AF_INET6, &peer->addr, keys->key[0],
+			sizeof(keys->key[0]));
+
 	return NB_OK;
 }
 
@@ -594,7 +606,17 @@ static const void *
 ripngd_state_neighbors_neighbor_lookup_entry(const void *parent_list_entry,
 					     const struct yang_list_keys *keys)
 {
-	/* TODO: implement me. */
+	struct in6_addr address;
+	struct ripng_peer *peer;
+	struct listnode *node;
+
+	yang_str2ipv6(keys->key[0], &address);
+
+	for (ALL_LIST_ELEMENTS_RO(peer_list, node, peer)) {
+		if (IPV6_ADDR_SAME(&peer->addr, &address))
+			return node;
+	}
+
 	return NULL;
 }
 
@@ -605,8 +627,10 @@ static struct yang_data *
 ripngd_state_neighbors_neighbor_address_get_elem(const char *xpath,
 						 const void *list_entry)
 {
-	/* TODO: implement me. */
-	return NULL;
+	const struct listnode *node = list_entry;
+	const struct ripng_peer *peer = listgetdata(node);
+
+	return yang_data_new_ipv6(xpath, &peer->addr);
 }
 
 /*
@@ -616,7 +640,7 @@ static struct yang_data *
 ripngd_state_neighbors_neighbor_last_update_get_elem(const char *xpath,
 						     const void *list_entry)
 {
-	/* TODO: implement me. */
+	/* TODO: yang:date-and-time is tricky */
 	return NULL;
 }
 
@@ -627,8 +651,10 @@ 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;
+	const struct listnode *node = list_entry;
+	const struct ripng_peer *peer = listgetdata(node);
+
+	return yang_data_new_uint32(xpath, peer->recv_badpackets);
 }
 
 /*
@@ -638,8 +664,10 @@ 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;
+	const struct listnode *node = list_entry;
+	const struct ripng_peer *peer = listgetdata(node);
+
+	return yang_data_new_uint32(xpath, peer->recv_badroutes);
 }
 
 /*
diff --git a/ripngd/ripngd.h b/ripngd/ripngd.h
index fc29b9d0d9..5b32374ace 100644
--- a/ripngd/ripngd.h
+++ b/ripngd/ripngd.h
@@ -329,6 +329,7 @@ struct ripng_offset_list {
 
 /* Extern variables. */
 extern struct ripng *ripng;
+extern struct list *peer_list;
 extern struct zebra_privs_t ripngd_privs;
 extern struct thread_master *master;
 
-- 
2.39.5