1 files changed, 102 insertions, 0 deletions
diff --git a/lib/routing_nb_config.c b/lib/routing_nb_config.c
new file mode 100644
index 0000000..f4fe48f
--- /dev/null
+++ b/lib/routing_nb_config.c
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2018        Vmware
+ *                           Vishal Dhingra
+ */
+
+#include <zebra.h>
+
+#include "northbound.h"
+#include "libfrr.h"
+#include "vrf.h"
+#include "lib_errors.h"
+#include "routing_nb.h"
+
+
+DEFINE_HOOK(routing_conf_event, (struct nb_cb_create_args *args), (args));
+
+/*
+ * XPath: /frr-routing:routing/control-plane-protocols/control-plane-protocol
+ */
+
+int routing_control_plane_protocols_control_plane_protocol_create(
+	struct nb_cb_create_args *args)
+{
+	struct vrf *vrf;
+	const char *vrfname;
+
+	switch (args->event) {
+	case NB_EV_VALIDATE:
+		if (hook_call(routing_conf_event, args))
+			return NB_ERR_VALIDATION;
+		break;
+	case NB_EV_PREPARE:
+	case NB_EV_ABORT:
+		break;
+	case NB_EV_APPLY:
+		/*
+		 * If the daemon relies on the VRF pointer stored in this
+		 * dnode, then it should register the dependency between this
+		 * module and the VRF module using
+		 * routing_control_plane_protocols_register_vrf_dependency.
+		 * If such dependency is not registered, then nothing is
+		 * stored in the dnode. If the dependency is registered,
+		 * find the vrf and store the pointer.
+		 */
+		if (nb_node_has_dependency(args->dnode->schema->priv)) {
+			vrfname = yang_dnode_get_string(args->dnode, "./vrf");
+			vrf = vrf_lookup_by_name(vrfname);
+			assert(vrf);
+			nb_running_set_entry(args->dnode, vrf);
+		}
+		break;
+	};
+
+	return NB_OK;
+}
+
+int routing_control_plane_protocols_control_plane_protocol_destroy(
+	struct nb_cb_destroy_args *args)
+{
+	if (args->event != NB_EV_APPLY)
+		return NB_OK;
+
+	/*
+	 * If dependency on VRF module is registered, then VRF
+	 * pointer was stored and must be cleared.
+	 */
+	if (nb_node_has_dependency(args->dnode->schema->priv))
+		nb_running_unset_entry(args->dnode);
+
+	return NB_OK;
+}
+
+static void vrf_to_control_plane_protocol(const struct lyd_node *dnode,
+					  char *xpath)
+{
+	const char *vrf;
+
+	vrf = yang_dnode_get_string(dnode, "./name");
+
+	snprintf(xpath, XPATH_MAXLEN, FRR_ROUTING_KEY_XPATH_VRF, vrf);
+}
+
+static void control_plane_protocol_to_vrf(const struct lyd_node *dnode,
+					  char *xpath)
+{
+	const char *vrf;
+
+	vrf = yang_dnode_get_string(dnode, "./vrf");
+
+	snprintf(xpath, XPATH_MAXLEN, FRR_VRF_KEY_XPATH, vrf);
+}
+
+void routing_control_plane_protocols_register_vrf_dependency(void)
+{
+	struct nb_dependency_callbacks cbs;
+
+	cbs.get_dependant_xpath = vrf_to_control_plane_protocol;
+	cbs.get_dependency_xpath = control_plane_protocol_to_vrf;
+
+	nb_node_set_dependency_cbs(FRR_VRF_XPATH, FRR_ROUTING_XPATH, &cbs);
+}