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/*
* Copyright (c) 2014, Ford Motor Company
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of the Ford Motor Company nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "protocol_handler/incoming_data_handler.h"
#include "utils/logger.h"
#include "protocol/common.h"
namespace protocol_handler {
CREATE_LOGGERPTR_GLOBAL(logger_, "ProtocolHandler")
IncomingDataHandler::IncomingDataHandler()
: header_(), validator_(NULL) {}
void IncomingDataHandler::set_validator(
const ProtocolPacket::ProtocolHeaderValidator *const validator) {
validator_ = validator;
}
static const size_t MIN_HEADER_SIZE = std::min(PROTOCOL_HEADER_V1_SIZE,
PROTOCOL_HEADER_V2_SIZE);
std::list<ProtocolFramePtr> IncomingDataHandler::ProcessData(
const RawMessage &tm_message,
RESULT_CODE *result,
size_t *malformed_occurrence) {
LOG4CXX_AUTO_TRACE(logger_);
DCHECK(result);
DCHECK(malformed_occurrence);
const transport_manager::ConnectionUID connection_id =
tm_message.connection_key();
const uint8_t *data = tm_message.data();
const size_t tm_message_size = tm_message.data_size();
if (tm_message_size == 0 || data == NULL) {
LOG4CXX_WARN(logger_, "Wrong raw message " << tm_message_size << " bytes");
*result = RESULT_FAIL;
return std::list<ProtocolFramePtr>();
}
LOG4CXX_DEBUG(logger_, "Processing incoming data of size "
<< tm_message_size << " for connection " << connection_id);
ConnectionsDataMap::iterator it = connections_data_.find(connection_id);
if (connections_data_.end() == it) {
LOG4CXX_WARN(logger_, "ProcessData requested for unknown connection");
*result = RESULT_FAIL;
return std::list<ProtocolFramePtr>();
}
std::vector<uint8_t> &connection_data = it->second;
connection_data.insert(connection_data.end(), data, data + tm_message_size);
LOG4CXX_DEBUG(logger_, "Total data size for connection "
<< connection_id << " is " << connection_data.size());
std::list<ProtocolFramePtr> out_frames;
*malformed_occurrence = 0;
*result = CreateFrame(connection_data, out_frames, *malformed_occurrence, connection_id);
LOG4CXX_DEBUG(logger_, "New data size for connection " << connection_id
<< " is " << connection_data.size());
if (!out_frames.empty()) {
LOG4CXX_DEBUG(logger_, "Created and passed " << out_frames.size() <<
" packets");
} else {
if (RESULT_DEFERRED == *result) {
LOG4CXX_DEBUG(logger_,
"No packets have been created. Waiting next portion of data.");
} else {
LOG4CXX_WARN(logger_, "No packets have been created.");
}
}
if (*malformed_occurrence > 0u) {
*result = RESULT_MALFORMED_OCCURS;
} else {
*result = RESULT_OK;
}
return out_frames;
}
void IncomingDataHandler::AddConnection(
const transport_manager::ConnectionUID connection_id) {
LOG4CXX_AUTO_TRACE(logger_);
// Add empty list of session to new connection
connections_data_[connection_id] = ConnectionsDataMap::mapped_type();
}
void IncomingDataHandler::RemoveConnection(
const transport_manager::ConnectionUID connection_id) {
LOG4CXX_AUTO_TRACE(logger_);
connections_data_.erase(connection_id);
}
uint32_t IncomingDataHandler::GetPacketSize(
const ProtocolPacket::ProtocolHeader &header) {
switch (header.version) {
case PROTOCOL_VERSION_1:
return header.dataSize + PROTOCOL_HEADER_V1_SIZE;
case PROTOCOL_VERSION_2:
case PROTOCOL_VERSION_3:
case PROTOCOL_VERSION_4:
return header.dataSize + PROTOCOL_HEADER_V2_SIZE;
default:
LOG4CXX_WARN(logger_, "Unknown version");
break;
}
return 0u;
}
RESULT_CODE IncomingDataHandler::CreateFrame(
std::vector<uint8_t> &incoming_data,
std::list<ProtocolFramePtr> &out_frames,
size_t &malformed_occurrence,
const transport_manager::ConnectionUID connection_id) {
LOG4CXX_AUTO_TRACE(logger_);
bool correct_frame_occurs = true;
std::vector<uint8_t>::iterator data_it = incoming_data.begin();
size_t data_size = incoming_data.size();
while (data_size >= MIN_HEADER_SIZE) {
header_.deserialize(&*data_it, data_size);
const RESULT_CODE validate_result =
validator_ ? validator_->validate(header_) : RESULT_OK;
if (validate_result != RESULT_OK) {
LOG4CXX_WARN(logger_, "Packet validation failed");
if(correct_frame_occurs) {
++malformed_occurrence;
}
correct_frame_occurs = false;
++data_it;
--data_size;
LOG4CXX_DEBUG(logger_, "Moved to the next byte " << std::hex
<< static_cast<const void *>(&*data_it));
continue;
}
LOG4CXX_DEBUG(logger_, "Payload size " << header_.dataSize);
const uint32_t packet_size = GetPacketSize(header_);
if (packet_size <= 0) {
LOG4CXX_WARN(logger_, "Null packet size");
++data_it;
--data_size;
LOG4CXX_DEBUG(logger_, "Moved to the next byte " << std::hex
<< static_cast<const void *>(&*data_it));
continue;
}
if (data_size < packet_size) {
LOG4CXX_DEBUG(logger_, "Packet data is not available yet");
incoming_data.erase(incoming_data.begin(), data_it);
return RESULT_DEFERRED;
}
ProtocolFramePtr frame(new protocol_handler::ProtocolPacket(connection_id));
const RESULT_CODE deserialize_result =
frame->deserializePacket(&*data_it, packet_size);
if (deserialize_result != RESULT_OK) {
LOG4CXX_WARN(logger_, "Packet deserialization failed");
incoming_data.erase(incoming_data.begin(), data_it);
return RESULT_FAIL;
}
out_frames.push_back(frame);
correct_frame_occurs = true;
data_it += packet_size;
data_size -= packet_size;
}
incoming_data.erase(incoming_data.begin(), data_it);
return RESULT_OK;
}
} // namespace protocol_handler
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