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#include "message_handler.hpp"
#include <sys/socket.h>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include "command_table.hpp"
#include "main.hpp"
#include "message.hpp"
#include "message_parsers.hpp"
#include "sessions_manager.hpp"
namespace message
{
std::unique_ptr<Message> Handler::receive()
{
std::vector<uint8_t> packet;
auto readStatus = 0;
// Read the packet
std::tie(readStatus, packet) = channel->read();
// Read of the packet failed
if (readStatus < 0)
{
std::cerr << "E> Error in Read : " << std::hex << readStatus << "\n";
return nullptr;
}
// Unflatten the packet
std::unique_ptr<Message> message;
std::tie(message, sessionHeader) = parser::unflatten(packet);
auto session = (std::get<session::Manager&>(singletonPool).getSession(
message->bmcSessionID)).lock();
sessionID = message->bmcSessionID;
message->rcSessionID = session->getRCSessionID();
session->updateLastTransactionTime();
return message;
}
template<>
std::unique_ptr<Message> Handler::createResponse<PayloadType::IPMI>(
std::vector<uint8_t>& output, Message& inMessage)
{
auto outMessage = std::make_unique<Message>();
outMessage->payloadType = PayloadType::IPMI;
outMessage->payload.resize(sizeof(LAN::header::Response) +
output.size() +
sizeof(LAN::trailer::Response));
auto reqHeader = reinterpret_cast<LAN::header::Request*>
(inMessage.payload.data());
auto respHeader = reinterpret_cast<LAN::header::Response*>
(outMessage->payload.data());
// Add IPMI LAN Message Response Header
respHeader->rqaddr = reqHeader->rqaddr;
respHeader->netfn = reqHeader->netfn | 0x04;
respHeader->cs = crc8bit(&(respHeader->rqaddr), 2);
respHeader->rsaddr = reqHeader->rsaddr;
respHeader->rqseq = reqHeader->rqseq;
respHeader->cmd = reqHeader->cmd;
auto assembledSize = sizeof(LAN::header::Response);
// Copy the output by the execution of the command
std::copy(output.begin(), output.end(),
outMessage->payload.begin() + assembledSize);
assembledSize += output.size();
// Add the IPMI LAN Message Trailer
auto trailer = reinterpret_cast<LAN::trailer::Response*>
(outMessage->payload.data() + assembledSize);
trailer->checksum = crc8bit(&respHeader->rsaddr, assembledSize - 3);
return outMessage;
}
std::unique_ptr<Message> Handler::executeCommand(Message& inMessage)
{
// Get the CommandID to map into the command table
auto command = getCommand(inMessage);
std::vector<uint8_t> output{};
if (inMessage.payloadType == PayloadType::IPMI)
{
if (inMessage.payload.size() < (sizeof(LAN::header::Request) +
sizeof(LAN::trailer::Request)))
{
return nullptr;
}
auto start = inMessage.payload.begin() + sizeof(LAN::header::Request);
auto end = inMessage.payload.end() - sizeof(LAN::trailer::Request);
std::vector<uint8_t> inPayload(start, end);
output = std::get<command::Table&>(singletonPool).executeCommand(
command,
inPayload,
*this);
}
else
{
output = std::get<command::Table&>(singletonPool).executeCommand(
command,
inMessage.payload,
*this);
}
std::unique_ptr<Message> outMessage = nullptr;
switch (inMessage.payloadType)
{
case PayloadType::IPMI:
outMessage = createResponse<PayloadType::IPMI>(output, inMessage);
break;
case PayloadType::OPEN_SESSION_REQUEST:
outMessage = createResponse<PayloadType::OPEN_SESSION_RESPONSE>(
output, inMessage);
break;
case PayloadType::RAKP1:
outMessage = createResponse<PayloadType::RAKP2>(output, inMessage);
break;
case PayloadType::RAKP3:
outMessage = createResponse<PayloadType::RAKP4>(output, inMessage);
break;
default:
break;
}
outMessage->isPacketEncrypted = inMessage.isPacketEncrypted;
outMessage->isPacketAuthenticated = inMessage.isPacketAuthenticated;
outMessage->rcSessionID = inMessage.rcSessionID;
outMessage->bmcSessionID = inMessage.bmcSessionID;
return outMessage;
}
uint32_t Handler::getCommand(Message& message)
{
uint32_t command = 0 ;
command |= (static_cast<uint8_t>(message.payloadType) << 16);
if (message.payloadType == PayloadType::IPMI)
{
command |= ((reinterpret_cast<LAN::header::Request*>
(message.payload.data()))->netfn) << 8;
command |= (reinterpret_cast<LAN::header::Request*>
(message.payload.data()))->cmd;
}
return command;
}
int Handler::send(Message& outMessage)
{
auto session = (std::get<session::Manager&>(singletonPool).getSession(
sessionID)).lock();
// Flatten the packet
auto packet = parser::flatten(outMessage, sessionHeader, *session);
// Read the packet
auto writeStatus = channel->write(packet);
if (writeStatus < 0)
{
std::cerr << "E> Error in writing : " << std::hex << writeStatus
<< "\n";
}
return writeStatus;
}
} //namespace message
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