/*
 *
 *    Copyright (c) 2019 Google LLC.
 *    All rights reserved.
 *
 *    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.
 */

/**
 *    @file
 *      This file contains functions for working with Inet Layer errors.
 */

#include <stddef.h>

#include <InetLayer/Inet.h>
#include <InetLayer/InetError.h>

#include <Weave/Support/ErrorStr.h>


namespace nl {
extern void FormatError(char * buf, uint16_t bufSize, const char * subsys, int32_t err, const char * desc);
}

namespace nl {
namespace Inet {

/**
 * Register a text error formatter for Inet Layer errors.
 */
void RegisterInetLayerErrorFormatter(void)
{
    static ErrorFormatter sInetLayerErrorFormatter =
    {
        FormatInetLayerError,
        NULL
    };

    RegisterErrorFormatter(&sInetLayerErrorFormatter);
}

/**
 * Given an Inet Layer error, returns a human-readable NULL-terminated C string
 * describing the error.
 *
 * @param[in] buf                   Buffer into which the error string will be placed.
 * @param[in] bufSize               Size of the supplied buffer in bytes.
 * @param[in] err                   The error to be described.
 *
 * @return true                     If a description string was written into the supplied buffer.
 * @return false                    If the supplied error was not an Inet Layer error.
 *
 */
bool FormatInetLayerError(char * buf, uint16_t bufSize, int32_t err)
{
    const char * desc = NULL;

    if (err < INET_ERROR_MIN || err > INET_ERROR_MAX)
    {
        return false;
    }

#if !WEAVE_CONFIG_SHORT_ERROR_STR
    switch (err)
    {
    case INET_ERROR_WRONG_ADDRESS_TYPE                          : desc = "Wrong address type"; break;
    case INET_ERROR_CONNECTION_ABORTED                          : desc = "TCP connection aborted"; break;
    case INET_ERROR_PEER_DISCONNECTED                           : desc = "Peer disconnected"; break;
    case INET_ERROR_INCORRECT_STATE                             : desc = "Incorrect state"; break;
    case INET_ERROR_MESSAGE_TOO_LONG                            : desc = "Message too long"; break;
    case INET_ERROR_NO_CONNECTION_HANDLER                       : desc = "No TCP connection handler"; break;
    case INET_ERROR_NO_MEMORY                                   : desc = "No memory"; break;
    case INET_ERROR_OUTBOUND_MESSAGE_TRUNCATED                  : desc = "Outbound message truncated"; break;
    case INET_ERROR_INBOUND_MESSAGE_TOO_BIG                     : desc = "Inbound message too big"; break;
    case INET_ERROR_HOST_NOT_FOUND                              : desc = "Host not found"; break;
    case INET_ERROR_DNS_TRY_AGAIN                               : desc = "DNS try again"; break;
    case INET_ERROR_DNS_NO_RECOVERY                             : desc = "DNS no recovery"; break;
    case INET_ERROR_BAD_ARGS                                    : desc = "Bad arguments"; break;
    case INET_ERROR_WRONG_PROTOCOL_TYPE                         : desc = "Wrong protocol type"; break;
    case INET_ERROR_UNKNOWN_INTERFACE                           : desc = "Unknown interface"; break;
    case INET_ERROR_NOT_IMPLEMENTED                             : desc = "Not implemented"; break;
    case INET_ERROR_ADDRESS_NOT_FOUND                           : desc = "Address not found"; break;
    case INET_ERROR_HOST_NAME_TOO_LONG                          : desc = "Host name too long"; break;
    case INET_ERROR_INVALID_HOST_NAME                           : desc = "Invalid host name"; break;
    case INET_ERROR_NOT_SUPPORTED                               : desc = "Not supported"; break;
    case INET_ERROR_NO_ENDPOINTS                                : desc = "No more TCP endpoints"; break;
    case INET_ERROR_IDLE_TIMEOUT                                : desc = "Idle timeout"; break;
    case INET_ERROR_UNEXPECTED_EVENT                            : desc = "Unexpected event"; break;
    case INET_ERROR_INVALID_IPV6_PKT                            : desc = "Invalid IPv6 Packet"; break;
    case INET_ERROR_INTERFACE_INIT_FAILURE                      : desc = "Failure to initialize interface"; break;
    case INET_ERROR_TCP_USER_TIMEOUT                            : desc = "TCP User Timeout"; break;
    case INET_ERROR_TCP_CONNECT_TIMEOUT                         : desc = "TCP Connect Timeout"; break;
    case INET_ERROR_INCOMPATIBLE_IP_ADDRESS_TYPE                : desc = "Incompatible IP address type"; break;
    }
#endif // !WEAVE_CONFIG_SHORT_ERROR_STR

    nl::FormatError(buf, bufSize, "Inet", err, desc);

    return true;
}

} // namespace Inet
} // namespace nl