Header.cpp

/*
 * If not stated otherwise in this file or this component's Licenses.txt file the
 * following copyright and licenses apply:
 *
 * Copyright 2016 RDK Management
 *
 * 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.
*/
 
 
/**
* @defgroup trm
* @{
* @defgroup common
* @{
**/
 
 
#include "trm/TRM.h"
#include "trm/Header.h"
#include "Util.h"
 
TRM_BEGIN_NAMESPACE
const char Header::kProtocol[4] = {'T','R', 'M', 'S'};
 
Header::Header(MessageType type, int clientId, size_t payloadLength)
: type(type), clientId(clientId), payloadLength(payloadLength)
{
}
 
void Header::serialize(std::vector<uint8_t> &out) const
{
        out.resize(Header::kHeaderLength, 0);
 
        /* First 4 bytes are 'T'R'M'S */
        out[0]  = kProtocol[0];
        out[1]  = kProtocol[1];
        out[2]  = kProtocol[2];
        out[3]  = kProtocol[3];
        /* Next 4 bytes are Message Type */
        out[4]  = (type & 0xFF000000) >> 24;
        out[5]  = (type & 0x00FF0000) >> 16;
        out[6]  = (type & 0x0000FF00) >>  8;
        out[7]  = (type & 0x000000FF) >>  0;
        /* Next 4 bytes are transportId () */
        out[8]  = (clientId & 0xFF000000)  >> 24;
        out[9]  = (clientId & 0x00FF0000)  >> 16;
        out[10] = (clientId & 0x0000FF00) >>  8;
        out[11] = (clientId & 0x000000FF) >>  0;
        /* Last 4 bytes are Payload Length (Unused) */
        out[12]  = (payloadLength & 0xFF000000) >> 24;
        out[13]  = (payloadLength & 0x00FF0000) >> 16;
        out[14]  = (payloadLength & 0x0000FF00) >>  8;
        out[15]  = (payloadLength & 0x000000FF) >>  0;
}
 
void Header::deserialize(const std::vector<uint8_t> &in)
{
        HexDump(in);
        if (in.size() >= 16) {
                uint8_t *ptr = (uint8_t *)&in[0];
                /* First 4 bytes are 'T'R'M'S */
                if (ptr[0]  == kProtocol[0] &&
                        ptr[1]  == kProtocol[1] &&
                        ptr[2]  == kProtocol[2] &&
                        ptr[3]  == kProtocol[3]) {
                        /* Next 4 bytes are Message Type */
                        type    = (MessageType)
                                          (((ptr[4]) << 24) |
                                   ((ptr[5]) << 16) |
                                   ((ptr[6]) <<  8) |
                                   ((ptr[7]) <<  0));
                        /* Next 4 bytes are Message Id (Unused) */
                        clientId =
                                          (((ptr[8]) << 24) |
                                   ((ptr[9]) << 16) |
                                   ((ptr[10]) <<  8) |
                                   ((ptr[11]) <<  0));
 
                        /* Last 4 bytes are Payload Length (Unused) */
                payloadLength=(((ptr[12]) << 24) |
                                   ((ptr[13]) << 16) |
                                   ((ptr[14]) <<  8) |
                                   ((ptr[15]) <<  0));
                }
                else {
                        //@TODO: discard invalid message.
                        Assert(0);
                }
        }
        else {
                Assert(0);
        }
}
 
void Header::setPayloadLength(size_t payloadLength)
{
        this->payloadLength = payloadLength;
}
 
size_t Header::getPayloadLength(void) const
{
        return payloadLength;
}
 
void Header::setClientId(uint32_t clientId)
{
        this->clientId = clientId;
}
 
uint32_t Header::getClientId(void) const
{
        return clientId;
}
 
TRM_END_NAMESPACE
 
 
 
 
/** @} */
/** @} */