From d4cb23d7bcb876f6022dd7fe65265a38ed0ddcda Mon Sep 17 00:00:00 2001
From: Mark Stapp <mjs@voltanet.io>
Date: Wed, 17 Oct 2018 15:54:53 -0400
Subject: [PATCH] zebra: add apis to add and delete NHLFEs

Add public versions of zebra apis that add NHLFEs to an LSP,
and that free NHLFEs. The dataplane code needs to capture/copy
NHLFEs in order to do async LSP programming.

Signed-off-by: Mark Stapp <mjs@voltanet.io>
---
 zebra/zebra_mpls.c | 23 +++++++++++++++++++++++
 zebra/zebra_mpls.h | 11 +++++++++++
 2 files changed, 34 insertions(+)

diff --git a/zebra/zebra_mpls.c b/zebra/zebra_mpls.c
index c0764cd4b8..db2fcae5b7 100644
--- a/zebra/zebra_mpls.c
+++ b/zebra/zebra_mpls.c
@@ -1807,6 +1807,29 @@ int zebra_mpls_lsp_uninstall(struct zebra_vrf *zvrf, struct route_node *rn,
 	return lsp_uninstall(zvrf, fec->label);
 }
 
+/*
+ * Add an NHLFE to an LSP, return the newly-added object
+ */
+zebra_nhlfe_t *zebra_mpls_lsp_add_nhlfe(zebra_lsp_t *lsp,
+					enum lsp_types_t lsp_type,
+					enum nexthop_types_t gtype,
+					union g_addr *gate,
+					ifindex_t ifindex,
+					mpls_label_t out_label)
+{
+	/* Just a public pass-through to the internal implementation */
+	return nhlfe_add(lsp, lsp_type, gtype, gate, ifindex, out_label);
+}
+
+/*
+ * Free an allocated NHLFE
+ */
+void zebra_mpls_nhlfe_del(zebra_nhlfe_t *nhlfe)
+{
+	/* Just a pass-through to the internal implementation */
+	nhlfe_del(nhlfe);
+}
+
 /*
  * Registration from a client for the label binding for a FEC. If a binding
  * already exists, it is informed to the client.
diff --git a/zebra/zebra_mpls.h b/zebra/zebra_mpls.h
index c250fc4058..2c95d22c4e 100644
--- a/zebra/zebra_mpls.h
+++ b/zebra/zebra_mpls.h
@@ -191,6 +191,17 @@ int zebra_mpls_lsp_install(struct zebra_vrf *zvrf, struct route_node *rn,
 int zebra_mpls_lsp_uninstall(struct zebra_vrf *zvrf, struct route_node *rn,
 			     struct route_entry *re);
 
+/* Add an NHLFE to an LSP, return the newly-added object */
+zebra_nhlfe_t *zebra_mpls_lsp_add_nhlfe(zebra_lsp_t *lsp,
+					enum lsp_types_t lsp_type,
+					enum nexthop_types_t gtype,
+					union g_addr *gate,
+					ifindex_t ifindex,
+					mpls_label_t out_label);
+
+/* Free an allocated NHLFE */
+void zebra_mpls_nhlfe_del(zebra_nhlfe_t *nhlfe);
+
 int zebra_mpls_fec_register(struct zebra_vrf *zvrf, struct prefix *p,
 			    uint32_t label, uint32_t label_index,
 			    struct zserv *client);