isisd: Add Link State Traffic Engineering support

Add Link State TED features to isis_te.c and new CLI to export LS TED and
show LS TED to IS-IS.

IS-IS LSPs are parse each time a new LSP event occurs in order to update
accordingly the Link State Traffic Engineering Database. LS TED could be
exported through the ZAPI Opaque message (see sharpd as example).

Signed-off-by: Olivier Dugeon <olivier.dugeon@orange.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/isisd/isis_nb_config.c b/isisd/isis_nb_config.c
index bf043c4f4..b1c796668 100644
--- a/isisd/isis_nb_config.c
+++ b/isisd/isis_nb_config.c
@@ -33,6 +33,7 @@
 #include "lib_errors.h"
 #include "vrf.h"
 #include "ldp_sync.h"
+#include "link_state.h"
 
 #include "isisd/isisd.h"
 #include "isisd/isis_nb.h"
@@ -51,6 +52,7 @@
 #include "isisd/isis_redist.h"
 #include "isisd/isis_ldp_sync.h"
 #include "isisd/isis_dr.h"
+#include "isisd/isis_zebra.h"
 
 DEFINE_MTYPE_STATIC(ISISD, ISIS_MPLS_TE,    "ISIS MPLS_TE parameters");
 DEFINE_MTYPE_STATIC(ISISD, ISIS_PLIST_NAME, "ISIS prefix-list name");
@@ -1827,12 +1829,19 @@ int isis_instance_mpls_te_create(struct nb_cb_create_args *args)
 		new->inter_as = off;
 		new->interas_areaid.s_addr = 0;
 		new->router_id.s_addr = 0;
+		new->ted = ls_ted_new(1, "ISIS", 0);
+		if (!new->ted)
+			zlog_warn("Unable to create Link State Data Base");
 
 		area->mta = new;
 	} else {
 		area->mta->status = enable;
 	}
 
+	/* Initialize Link State Database */
+	if (area->mta->ted)
+		isis_te_init_ted(area);
+
 	/* Update Extended TLVs according to Interface link parameters */
 	for (ALL_LIST_ELEMENTS_RO(area->circuit_list, node, circuit))
 		isis_link_params_update(circuit, circuit->interface);
@@ -1858,6 +1867,9 @@ int isis_instance_mpls_te_destroy(struct nb_cb_destroy_args *args)
 	else
 		return NB_OK;
 
+	/* Remove Link State Database */
+	ls_ted_del_all(area->mta->ted);
+
 	/* Flush LSP if circuit engage */
 	for (ALL_LIST_ELEMENTS_RO(area->circuit_list, node, circuit)) {
 		if (!IS_EXT_TE(circuit->ext))
@@ -1981,6 +1993,37 @@ int isis_instance_mpls_te_router_address_ipv6_destroy(
 }
 
 /*
+ * XPath: /frr-isisd:isis/instance/mpls-te/export
+ */
+int isis_instance_mpls_te_export_modify(struct nb_cb_modify_args *args)
+{
+	struct isis_area *area;
+
+	if (args->event != NB_EV_APPLY)
+		return NB_OK;
+
+	area = nb_running_get_entry(args->dnode, NULL, true);
+	/* only proceed if MPLS-TE is enabled */
+	if (!IS_MPLS_TE(area->mta))
+		return NB_OK;
+
+	area->mta->export = yang_dnode_get_bool(args->dnode, NULL);
+	if (area->mta->export) {
+		if (IS_DEBUG_EVENTS)
+			zlog_debug("MPLS-TE: Enabled Link State export");
+		if (isis_zebra_ls_register(true) != 0)
+			zlog_warn("Unable to register Link State\n");
+	} else {
+		if (IS_DEBUG_EVENTS)
+			zlog_debug("MPLS-TE: Disable Link State export");
+		if (isis_zebra_ls_register(false) != 0)
+			zlog_warn("Unable to register Link State\n");
+	}
+
+	return NB_OK;
+}
+
+/*
  * XPath: /frr-isisd:isis/instance/segment-routing/enabled
  */
 int isis_instance_segment_routing_enabled_modify(