From c5b2b5f65cd76c76f9d1ed1a219b33469f1e8524 Mon Sep 17 00:00:00 2001
From: Renato Westphal <renato@opensourcerouting.org>
Date: Fri, 4 Jan 2019 19:08:10 -0200
Subject: [PATCH] ripngd: add vrf input parameter to the "clear-ripng-route"
 RPC

Description of the new parameter (adapted from the ietf-rip module):

  "VRF name identifying a specific RIPng instance.
   This leaf is optional for the rpc.
   If it is specified, the rpc will clear all routes in the
   specified RIPng instance;
   if it is not specified, the rpc will clear all routes in
   all RIPng instances.";

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
---
 ripngd/ripng_cli.c        | 18 ++++++++++++++---
 ripngd/ripng_northbound.c | 42 ++++++++++++++++++++++++++++++---------
 yang/frr-ripngd.yang      | 13 ++++++++++++
 3 files changed, 61 insertions(+), 12 deletions(-)

diff --git a/ripngd/ripng_cli.c b/ripngd/ripng_cli.c
index c89832d51d..804fa8dea6 100644
--- a/ripngd/ripng_cli.c
+++ b/ripngd/ripng_cli.c
@@ -478,12 +478,24 @@ void cli_show_ipv6_ripng_split_horizon(struct vty *vty, struct lyd_node *dnode,
  */
 DEFPY (clear_ipv6_rip,
        clear_ipv6_rip_cmd,
-       "clear ipv6 ripng",
+       "clear ipv6 ripng [vrf WORD]",
        CLEAR_STR
        IPV6_STR
-       "Clear IPv6 RIP database\n")
+       "Clear IPv6 RIP database\n"
+       VRF_CMD_HELP_STR)
 {
-	return nb_cli_rpc("/frr-ripngd:clear-ripng-route", NULL, NULL);
+	struct list *input;
+
+	input = list_new();
+	if (vrf) {
+		struct yang_data *yang_vrf;
+
+		yang_vrf = yang_data_new(
+			"/frr-ripngd:clear-ripng-route/input/vrf", vrf);
+		listnode_add(input, yang_vrf);
+	}
+
+	return nb_cli_rpc("/frr-ripngd:clear-ripng-route", input, NULL);
 }
 
 void ripng_cli_init(void)
diff --git a/ripngd/ripng_northbound.c b/ripngd/ripng_northbound.c
index 3a1d528375..4b15a3aef7 100644
--- a/ripngd/ripng_northbound.c
+++ b/ripngd/ripng_northbound.c
@@ -32,6 +32,7 @@
 #include "libfrr.h"
 
 #include "ripngd/ripngd.h"
+#include "ripngd/ripng_debug.h"
 #include "ripngd/ripng_route.h"
 #include "ripngd/ripng_cli.h"
 
@@ -894,21 +895,20 @@ ripngd_instance_state_routes_route_metric_get_elem(const char *xpath,
 /*
  * XPath: /frr-ripngd:clear-ripng-route
  */
-static int clear_ripng_route_rpc(const char *xpath, const struct list *input,
-				 struct list *output)
+static void clear_ripng_route(struct ripng *ripng)
 {
-	struct ripng *ripng;
 	struct agg_node *rp;
-	struct ripng_info *rinfo;
-	struct list *list;
-	struct listnode *listnode;
 
-	ripng = ripng_lookup_by_vrf_id(VRF_DEFAULT);
-	if (!ripng)
-		return NB_OK;
+	if (IS_RIPNG_DEBUG_EVENT)
+		zlog_debug("Clearing all RIPng routes (VRF %s)",
+			   ripng->vrf_name);
 
 	/* Clear received RIPng routes */
 	for (rp = agg_route_top(ripng->table); rp; rp = agg_route_next(rp)) {
+		struct list *list;
+		struct listnode *listnode;
+		struct ripng_info *rinfo;
+
 		list = rp->info;
 		if (list == NULL)
 			continue;
@@ -935,6 +935,30 @@ static int clear_ripng_route_rpc(const char *xpath, const struct list *input,
 			agg_unlock_node(rp);
 		}
 	}
+}
+
+static int clear_ripng_route_rpc(const char *xpath, const struct list *input,
+				 struct list *output)
+{
+	struct ripng *ripng;
+	struct yang_data *yang_vrf;
+
+	yang_vrf = yang_data_list_find(input, "%s/%s", xpath, "input/vrf");
+	if (yang_vrf) {
+		ripng = ripng_lookup_by_vrf_name(yang_vrf->value);
+		if (ripng)
+			clear_ripng_route(ripng);
+	} else {
+		struct vrf *vrf;
+
+		RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) {
+			ripng = vrf->info;
+			if (!ripng)
+				continue;
+
+			clear_ripng_route(ripng);
+		}
+	}
 
 	return NB_OK;
 }
diff --git a/yang/frr-ripngd.yang b/yang/frr-ripngd.yang
index 6f7773f8ba..b341b438a4 100644
--- a/yang/frr-ripngd.yang
+++ b/yang/frr-ripngd.yang
@@ -322,5 +322,18 @@ module frr-ripngd {
     description
       "Clears RIPng routes from the IPv6 routing table and routes
        redistributed into the RIPng protocol.";
+
+    input {
+      leaf vrf {
+        type string;
+        description
+          "VRF name identifying a specific RIPng instance.
+           This leaf is optional for the rpc.
+           If it is specified, the rpc will clear all routes in the
+           specified RIPng instance;
+           if it is not specified, the rpc will clear all routes in
+           all RIPng instances.";
+      }
+    }
   }
 }
-- 
2.39.5