/*
 * Copyright (c) 2018 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/vnet.h>
#include <vlibmemory/api.h>
#include <vnet/mfib/mfib_api.h>
#include <vnet/mfib/mfib_table.h>
#include <vnet/fib/fib_api.h>
#include <vnet/ip/ip_types_api.h>

static vl_api_mfib_itf_flags_t
mfib_api_path_itf_flags_encode (mfib_itf_flags_t flags)
{
    vl_api_mfib_itf_flags_t out = MFIB_API_ITF_FLAG_NONE;

    switch (flags)
    {
    case MFIB_ITF_FLAG_NONE:
        out = MFIB_API_ITF_FLAG_NONE;
        break;
    case MFIB_ITF_FLAG_NEGATE_SIGNAL:
        out = MFIB_API_ITF_FLAG_NEGATE_SIGNAL;
        break;
    case MFIB_ITF_FLAG_ACCEPT:
        out = MFIB_API_ITF_FLAG_ACCEPT;
        break;
    case MFIB_ITF_FLAG_FORWARD:
        out = MFIB_API_ITF_FLAG_FORWARD;
        break;
    case MFIB_ITF_FLAG_SIGNAL_PRESENT:
        out = MFIB_API_ITF_FLAG_SIGNAL_PRESENT;
        break;
    case MFIB_ITF_FLAG_DONT_PRESERVE:
        out = MFIB_API_ITF_FLAG_DONT_PRESERVE;
        break;
    }
    return (ntohl(out));
}

void
mfib_api_path_encode (const fib_route_path_t *in,
                      vl_api_mfib_path_t *out)
{
    out->itf_flags = mfib_api_path_itf_flags_encode(in->frp_mitf_flags);

    fib_api_path_encode(in, &out->path);
}

static void
mfib_api_path_itf_flags_decode (vl_api_mfib_itf_flags_t in,
                                mfib_itf_flags_t *out)
{
    in = clib_net_to_host_u32(in);

    if (in & MFIB_API_ITF_FLAG_NEGATE_SIGNAL)
        *out |= MFIB_ITF_FLAG_NEGATE_SIGNAL;
    if (in & MFIB_API_ITF_FLAG_ACCEPT)
        *out |= MFIB_ITF_FLAG_ACCEPT;
    if (in & MFIB_API_ITF_FLAG_FORWARD)
        *out |= MFIB_ITF_FLAG_FORWARD;
    if (in & MFIB_API_ITF_FLAG_SIGNAL_PRESENT)
        *out |= MFIB_ITF_FLAG_SIGNAL_PRESENT;
    if (in & MFIB_API_ITF_FLAG_DONT_PRESERVE)
        *out |= MFIB_ITF_FLAG_DONT_PRESERVE;
}

mfib_entry_flags_t
mfib_api_path_entry_flags_decode (vl_api_mfib_entry_flags_t in)
{
    mfib_entry_flags_t out;

    out = MFIB_ENTRY_FLAG_NONE;
    in = clib_net_to_host_u32(in);

    if (in & MFIB_API_ENTRY_FLAG_SIGNAL)
        out |= MFIB_ENTRY_FLAG_SIGNAL;
    if (in & MFIB_API_ENTRY_FLAG_DROP)
        out |= MFIB_ENTRY_FLAG_DROP;
    if (in & MFIB_API_ENTRY_FLAG_CONNECTED)
        out |= MFIB_ENTRY_FLAG_CONNECTED;
    if (in & MFIB_API_ENTRY_FLAG_ACCEPT_ALL_ITF)
        out |= MFIB_ENTRY_FLAG_ACCEPT_ALL_ITF;

    return (out);
}

int
mfib_api_path_decode (vl_api_mfib_path_t *in,
                      fib_route_path_t *out)
{
    mfib_api_path_itf_flags_decode(in->itf_flags, &out->frp_mitf_flags);

    return (fib_api_path_decode(&in->path, out));
}

int
mfib_api_table_id_decode (fib_protocol_t fproto,
                          u32 table_id,
                          u32 *fib_index)
{
    *fib_index = mfib_table_find(fproto, table_id);

    if (INDEX_INVALID == *fib_index)
    {
        return VNET_API_ERROR_NO_SUCH_FIB;
    }

    return (0);
}