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#include "MySQLClient.h"
#include <Core/MySQL/Authentication.h>
#include <Core/MySQL/PacketsGeneric.h>
#include <Core/MySQL/PacketsConnection.h>
#include <Core/MySQL/PacketsProtocolText.h>
#include <Core/MySQL/PacketsReplication.h>
#include <Core/MySQL/MySQLReplication.h>
#include <Common/DNSResolver.h>
#include <Poco/String.h>
namespace DB
{
using namespace Generic;
using namespace Replication;
using namespace ProtocolText;
using namespace Authentication;
using namespace ConnectionPhase;
namespace ErrorCodes
{
extern const int UNKNOWN_PACKET_FROM_SERVER;
}
MySQLClient::MySQLClient(const String & host_, UInt16 port_, const String & user_, const String & password_)
: host(host_), port(port_), user(user_), password(password_),
client_capabilities(CLIENT_PROTOCOL_41 | CLIENT_PLUGIN_AUTH | CLIENT_SECURE_CONNECTION)
{
}
MySQLClient::MySQLClient(MySQLClient && other) noexcept
: host(std::move(other.host)), port(other.port), user(std::move(other.user)), password(std::move(other.password))
, client_capabilities(other.client_capabilities)
{
}
void MySQLClient::connect()
{
if (connected)
{
disconnect();
}
const Poco::Timespan connection_timeout(10'000'000'000);
const Poco::Timespan receive_timeout(5'000'000'000);
const Poco::Timespan send_timeout(5'000'000'000);
socket = std::make_unique<Poco::Net::StreamSocket>();
address = DNSResolver::instance().resolveAddress(host, port);
socket->connect(*address, connection_timeout);
socket->setReceiveTimeout(receive_timeout);
socket->setSendTimeout(send_timeout);
socket->setNoDelay(true);
connected = true;
in = std::make_shared<ReadBufferFromPocoSocket>(*socket);
out = std::make_shared<WriteBufferFromPocoSocket>(*socket);
packet_endpoint = std::make_shared<MySQLProtocol::PacketEndpoint>(*in, *out, sequence_id);
handshake();
}
void MySQLClient::disconnect()
{
in = nullptr;
out = nullptr;
if (socket)
socket->close();
socket = nullptr;
connected = false;
sequence_id = 0;
}
/// https://dev.mysql.com/doc/internals/en/connection-phase-packets.html
void MySQLClient::handshake()
{
Handshake handshake;
packet_endpoint->receivePacket(handshake);
if (handshake.auth_plugin_name != mysql_native_password)
{
throw Exception(ErrorCodes::UNKNOWN_PACKET_FROM_SERVER, "Only support {} auth plugin name, but got {}",
mysql_native_password, handshake.auth_plugin_name);
}
Native41 native41(password, handshake.auth_plugin_data);
String auth_plugin_data = native41.getAuthPluginData();
HandshakeResponse handshake_response(
client_capabilities, MAX_PACKET_LENGTH, charset_utf8, user, "", auth_plugin_data, mysql_native_password);
packet_endpoint->sendPacket<HandshakeResponse>(handshake_response, true);
ResponsePacket packet_response(client_capabilities, true);
packet_endpoint->receivePacket(packet_response);
packet_endpoint->resetSequenceId();
if (packet_response.getType() == PACKET_ERR)
throw Exception::createDeprecated(packet_response.err.error_message, ErrorCodes::UNKNOWN_PACKET_FROM_SERVER);
else if (packet_response.getType() == PACKET_AUTH_SWITCH)
throw Exception(ErrorCodes::UNKNOWN_PACKET_FROM_SERVER, "Access denied for user {}", user);
}
void MySQLClient::writeCommand(char command, String query)
{
WriteCommand write_command(command, query);
packet_endpoint->sendPacket<WriteCommand>(write_command, true);
ResponsePacket packet_response(client_capabilities);
packet_endpoint->receivePacket(packet_response);
switch (packet_response.getType())
{
case PACKET_ERR:
throw Exception::createDeprecated(packet_response.err.error_message, ErrorCodes::UNKNOWN_PACKET_FROM_SERVER);
case PACKET_OK:
break;
default:
break;
}
packet_endpoint->resetSequenceId();
}
void MySQLClient::registerSlaveOnMaster(UInt32 slave_id)
{
RegisterSlave register_slave(slave_id);
packet_endpoint->sendPacket<RegisterSlave>(register_slave, true);
ResponsePacket packet_response(client_capabilities);
packet_endpoint->receivePacket(packet_response);
packet_endpoint->resetSequenceId();
if (packet_response.getType() == PACKET_ERR)
throw Exception::createDeprecated(packet_response.err.error_message, ErrorCodes::UNKNOWN_PACKET_FROM_SERVER);
}
void MySQLClient::ping()
{
writeCommand(Command::COM_PING, "");
}
void MySQLClient::setBinlogChecksum(const String & binlog_checksum)
{
replication.setChecksumSignatureLength(Poco::toUpper(binlog_checksum) == "NONE" ? 0 : 4);
}
void MySQLClient::startBinlogDumpGTID(UInt32 slave_id, String replicate_db, std::unordered_set<String> replicate_tables, String gtid_str, const String & binlog_checksum)
{
/// Maybe CRC32 or NONE. mysqlbinlog.cc use NONE, see its below comments:
/// Make a notice to the server that this client is checksum-aware.
/// It does not need the first fake Rotate necessary checksummed.
writeCommand(Command::COM_QUERY, "SET @master_binlog_checksum = 'CRC32'");
setBinlogChecksum(binlog_checksum);
/// Set heartbeat 1s.
UInt64 period_ns = 1'000'000'000;
writeCommand(Command::COM_QUERY, "SET @master_heartbeat_period = " + std::to_string(period_ns));
// Register slave.
registerSlaveOnMaster(slave_id);
/// Set GTID Sets.
GTIDSets gtid_sets;
gtid_sets.parse(gtid_str);
replication.setGTIDSets(gtid_sets);
/// Set Filter rule to replication.
replication.setReplicateDatabase(replicate_db);
replication.setReplicateTables(replicate_tables);
BinlogDumpGTID binlog_dump(slave_id, gtid_sets.toPayload());
packet_endpoint->sendPacket<BinlogDumpGTID>(binlog_dump, true);
}
BinlogEventPtr MySQLClient::readOneBinlogEvent(UInt64 milliseconds)
{
if (packet_endpoint->tryReceivePacket(replication, milliseconds))
return replication.readOneEvent();
return {};
}
}
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