/*
 * Copyright (c) 2016 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <vnet/dpo/dpo.h>
#include <vnet/lisp-gpe/lisp_gpe.h>
#include <vnet/lisp-cp/control.h>

index_t
lisp_cp_dpo_get (fib_protocol_t proto)
{
    /*
     * there are only two instances of this DPO type.
     * we can use the protocol as the index
     */
    return (proto);
}

static u8*
format_lisp_cp_dpo (u8 *s, va_list *args)
{
    index_t index = va_arg (*args, index_t);
    CLIB_UNUSED(u32 indent) = va_arg (*args, u32);

    return (format(s, "lisp-cp-punt-%U",
                   format_fib_protocol, index));
}

static void
lisp_cp_dpo_lock (dpo_id_t *dpo)
{
}

static void
lisp_cp_dpo_unlock (dpo_id_t *dpo)
{
}

const static dpo_vft_t lisp_cp_vft = {
    .dv_lock = lisp_cp_dpo_lock,
    .dv_unlock = lisp_cp_dpo_unlock,
    .dv_format = format_lisp_cp_dpo,
};

/**
 * @brief The per-protocol VLIB graph nodes that are assigned to a LISP-CP
 *        object.
 *
 * this means that these graph nodes are ones from which a LISP-CP is the
 * parent object in the DPO-graph.
 */
const static char* const lisp_cp_ip4_nodes[] =
{
    "lisp-cp-lookup-ip4",
    NULL,
};
const static char* const lisp_cp_ip6_nodes[] =
{
    "lisp-cp-lookup-ip6",
    NULL,
};

const static char* const * const lisp_cp_nodes[DPO_PROTO_NUM] =
{
    [DPO_PROTO_IP4]  = lisp_cp_ip4_nodes,
    [DPO_PROTO_IP6]  = lisp_cp_ip6_nodes,
    [DPO_PROTO_MPLS] = NULL,
};

clib_error_t *
lisp_cp_dpo_module_init (vlib_main_t * vm)
{
    /*
     * there are no exit arcs from the LIS-CP VLIB node, so we
     * pass NULL as said node array.
     */
    dpo_register(DPO_LISP_CP, &lisp_cp_vft, lisp_cp_nodes);

    return (NULL);
}

VLIB_INIT_FUNCTION(lisp_cp_dpo_module_init);