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JDBC Type 4 driver for MySQL.
There is a newer version: 9.1.0
/*
 * Copyright (c) 2015, 2024, Oracle and/or its affiliates.
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License, version 2.0, as published by
 * the Free Software Foundation.
 *
 * This program is designed to work with certain software that is licensed under separate terms, as designated in a particular file or component or in
 * included license documentation. The authors of MySQL hereby grant you an additional permission to link the program and your derivative works with the
 * separately licensed software that they have either included with the program or referenced in the documentation.
 *
 * Without limiting anything contained in the foregoing, this file, which is part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
 * version 1.0, a copy of which can be found at http://oss.oracle.com/licenses/universal-foss-exception.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0, for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

package com.mysql.cj.protocol.a;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStream;

import com.mysql.cj.conf.PropertyKey;
import com.mysql.cj.conf.PropertySet;
import com.mysql.cj.exceptions.ExceptionFactory;
import com.mysql.cj.exceptions.ExceptionInterceptor;
import com.mysql.cj.exceptions.FeatureNotAvailableException;
import com.mysql.cj.exceptions.SSLParamsException;
import com.mysql.cj.log.Log;
import com.mysql.cj.protocol.AbstractSocketConnection;
import com.mysql.cj.protocol.FullReadInputStream;
import com.mysql.cj.protocol.PacketSentTimeHolder;
import com.mysql.cj.protocol.ReadAheadInputStream;
import com.mysql.cj.protocol.ServerSession;
import com.mysql.cj.protocol.SocketConnection;

public class NativeSocketConnection extends AbstractSocketConnection implements SocketConnection {

    @Override
    public void connect(String hostName, int portNumber, PropertySet propSet, ExceptionInterceptor excInterceptor, Log log, int loginTimeout) {
        try {
            this.port = portNumber;
            this.host = hostName;
            this.propertySet = propSet;
            this.exceptionInterceptor = excInterceptor;

            this.socketFactory = createSocketFactory(propSet.getStringProperty(PropertyKey.socketFactory).getStringValue());
            this.mysqlSocket = this.socketFactory.connect(this.host, this.port, propSet, loginTimeout);

            int socketTimeout = propSet.getIntegerProperty(PropertyKey.socketTimeout).getValue();
            if (socketTimeout != 0) {
                try {
                    this.mysqlSocket.setSoTimeout(socketTimeout);
                } catch (Exception ex) {
                    /* Ignore if the platform does not support it */
                }
            }

            this.socketFactory.beforeHandshake();

            InputStream rawInputStream;
            if (propSet.getBooleanProperty(PropertyKey.useReadAheadInput).getValue()) {
                rawInputStream = new ReadAheadInputStream(this.mysqlSocket.getInputStream(), 16384,
                        propSet.getBooleanProperty(PropertyKey.traceProtocol).getValue(), log);
            } else if (propSet.getBooleanProperty(PropertyKey.useUnbufferedInput).getValue()) {
                rawInputStream = this.mysqlSocket.getInputStream();
            } else {
                rawInputStream = new BufferedInputStream(this.mysqlSocket.getInputStream(), 16384);
            }

            this.mysqlInput = new FullReadInputStream(rawInputStream);
            this.mysqlOutput = new BufferedOutputStream(this.mysqlSocket.getOutputStream(), 16384);
        } catch (IOException ioEx) {
            throw ExceptionFactory.createCommunicationsException(propSet, null, new PacketSentTimeHolder() {
            }, null, ioEx, getExceptionInterceptor());
        }
    }

    @Override
    public void performTlsHandshake(ServerSession serverSession) throws SSLParamsException, FeatureNotAvailableException, IOException {
        performTlsHandshake(serverSession, null);
    }

    @Override
    public void performTlsHandshake(ServerSession serverSession, Log log) throws SSLParamsException, FeatureNotAvailableException, IOException {
        this.mysqlSocket = this.socketFactory.performTlsHandshake(this, serverSession, log);

        this.mysqlInput = new FullReadInputStream(
                this.propertySet.getBooleanProperty(PropertyKey.useUnbufferedInput).getValue() ? getMysqlSocket().getInputStream()
                        : new BufferedInputStream(getMysqlSocket().getInputStream(), 16384));

        this.mysqlOutput = new BufferedOutputStream(getMysqlSocket().getOutputStream(), 16384);
        this.mysqlOutput.flush();
    }

}