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#include "message_handler.hpp"
#include "command_table.hpp"
#include "main.hpp"
#include "message.hpp"
#include "message_parsers.hpp"
#include "sessions_manager.hpp"
#include <sys/socket.h>
#include <memory>
#include <phosphor-logging/log.hpp>
#include <string>
#include <vector>
using namespace phosphor::logging;
namespace message
{
using namespace phosphor::logging;
bool 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)
{
log<level::ERR>("Error in Read", entry("STATUS=%x", readStatus));
return false;
}
// Unflatten the packet
std::tie(inMessage, sessionHeader) = parser::unflatten(packet);
auto session = std::get<session::Manager&>(singletonPool)
.getSession(inMessage->bmcSessionID);
sessionID = inMessage->bmcSessionID;
inMessage->rcSessionID = session->getRCSessionID();
session->updateLastTransactionTime();
return true;
}
Handler::~Handler()
{
if (outPayload)
{
std::shared_ptr<Message> outMessage =
inMessage->createResponse(*outPayload);
if (!outMessage)
{
return;
}
try
{
send(outMessage);
}
catch (const std::exception& e)
{
// send failed, most likely due to a session closure
log<level::INFO>("Async RMCP+ reply failed",
entry("EXCEPTION=%s", e.what()));
}
}
}
void Handler::processIncoming()
{
// Read the incoming IPMI packet
if (!receive())
{
return;
}
// Execute the Command, possibly asynchronously
executeCommand();
// send happens during the destructor if a payload was set
}
void Handler::executeCommand()
{
// Get the CommandID to map into the command table
auto command = inMessage->getCommand();
if (inMessage->payloadType == PayloadType::IPMI)
{
if (inMessage->payload.size() <
(sizeof(LAN::header::Request) + sizeof(LAN::trailer::Request)))
{
return;
}
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);
std::get<command::Table&>(singletonPool)
.executeCommand(command, inPayload, shared_from_this());
}
else
{
std::get<command::Table&>(singletonPool)
.executeCommand(command, inMessage->payload, shared_from_this());
}
}
void Handler::send(std::shared_ptr<Message> outMessage)
{
auto session =
std::get<session::Manager&>(singletonPool).getSession(sessionID);
// Flatten the packet
auto packet = parser::flatten(outMessage, sessionHeader, session);
// Write the packet
auto writeStatus = channel->write(packet);
if (writeStatus < 0)
{
throw std::runtime_error("Error in writing to socket");
}
}
void Handler::setChannelInSession() const
{
auto session =
std::get<session::Manager&>(singletonPool).getSession(sessionID);
session->channelPtr = channel;
}
void Handler::sendSOLPayload(const std::vector<uint8_t>& input)
{
auto session =
std::get<session::Manager&>(singletonPool).getSession(sessionID);
auto outMessage = std::make_shared<Message>();
outMessage->payloadType = PayloadType::SOL;
outMessage->payload = input;
outMessage->isPacketEncrypted = session->isCryptAlgoEnabled();
outMessage->isPacketAuthenticated = session->isIntegrityAlgoEnabled();
outMessage->rcSessionID = session->getRCSessionID();
outMessage->bmcSessionID = sessionID;
send(outMessage);
}
void Handler::sendUnsolicitedIPMIPayload(uint8_t netfn, uint8_t cmd,
const std::vector<uint8_t>& output)
{
auto session =
std::get<session::Manager&>(singletonPool).getSession(sessionID);
auto outMessage = std::make_shared<Message>();
outMessage->payloadType = PayloadType::IPMI;
outMessage->isPacketEncrypted = session->isCryptAlgoEnabled();
outMessage->isPacketAuthenticated = session->isIntegrityAlgoEnabled();
outMessage->rcSessionID = session->getRCSessionID();
outMessage->bmcSessionID = sessionID;
outMessage->payload.resize(sizeof(LAN::header::Request) + output.size() +
sizeof(LAN::trailer::Request));
auto respHeader =
reinterpret_cast<LAN::header::Request*>(outMessage->payload.data());
// Add IPMI LAN Message Request Header
respHeader->rsaddr = LAN::requesterBMCAddress;
respHeader->netfn = (netfn << 0x02);
respHeader->cs = crc8bit(&(respHeader->rsaddr), 2);
respHeader->rqaddr = LAN::responderBMCAddress;
respHeader->rqseq = 0;
respHeader->cmd = cmd;
auto assembledSize = sizeof(LAN::header::Request);
// 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::Request*>(
outMessage->payload.data() + assembledSize);
// Calculate the checksum for the field rqaddr in the header to the
// command data, 3 corresponds to size of the fields before rqaddr( rsaddr,
// netfn, cs).
trailer->checksum = crc8bit(&respHeader->rqaddr, assembledSize - 3);
send(outMessage);
}
} // namespace message
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