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/*
* Copyright (c) 2015, 2021, 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 also distributed with certain software (including but not
* limited to OpenSSL) 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 included with MySQL.
*
* 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 com.mysql.cj.Messages;
import com.mysql.cj.ServerVersion;
import com.mysql.cj.exceptions.ExceptionFactory;
import com.mysql.cj.exceptions.UnableToConnectException;
import com.mysql.cj.protocol.ServerCapabilities;
import com.mysql.cj.protocol.a.NativeConstants.IntegerDataType;
import com.mysql.cj.protocol.a.NativeConstants.StringLengthDataType;
import com.mysql.cj.protocol.a.NativeConstants.StringSelfDataType;
public class NativeCapabilities implements ServerCapabilities {
private NativePacketPayload initialHandshakePacket;
private byte protocolVersion = 0;
private ServerVersion serverVersion;
private long threadId = -1;
private String seed;
private int capabilityFlags;
private int serverDefaultCollationIndex;
private int statusFlags = 0;
private int authPluginDataLength = 0;
private boolean serverHasFracSecsSupport = true;
public NativeCapabilities(NativePacketPayload initialHandshakePacket) {
this.initialHandshakePacket = initialHandshakePacket;
// Get the protocol version
this.protocolVersion = (byte) initialHandshakePacket.readInteger(IntegerDataType.INT1);
try {
this.serverVersion = ServerVersion.parseVersion(initialHandshakePacket.readString(StringSelfDataType.STRING_TERM, "ASCII"));
// read connection id
this.threadId = initialHandshakePacket.readInteger(IntegerDataType.INT4);
// read auth-plugin-data-part-1 (string[8])
this.seed = initialHandshakePacket.readString(StringLengthDataType.STRING_FIXED, "ASCII", 8);
// read filler ([00])
initialHandshakePacket.readInteger(IntegerDataType.INT1);
int flags = 0;
// read capability flags (lower 2 bytes)
if (initialHandshakePacket.getPosition() < initialHandshakePacket.getPayloadLength()) {
flags = (int) initialHandshakePacket.readInteger(IntegerDataType.INT2);
}
// read character set (1 byte)
this.serverDefaultCollationIndex = (int) initialHandshakePacket.readInteger(IntegerDataType.INT1);
// read status flags (2 bytes)
this.statusFlags = (int) initialHandshakePacket.readInteger(IntegerDataType.INT2);
// read capability flags (upper 2 bytes)
flags |= (int) initialHandshakePacket.readInteger(IntegerDataType.INT2) << 16;
setCapabilityFlags(flags);
if ((flags & NativeServerSession.CLIENT_PLUGIN_AUTH) != 0) {
// read length of auth-plugin-data (1 byte)
this.authPluginDataLength = (int) initialHandshakePacket.readInteger(IntegerDataType.INT1);
} else {
// read filler ([00])
initialHandshakePacket.readInteger(IntegerDataType.INT1);
}
// next 10 bytes are reserved (all [00])
initialHandshakePacket.setPosition(initialHandshakePacket.getPosition() + 10);
this.serverHasFracSecsSupport = this.serverVersion.meetsMinimum(new ServerVersion(5, 6, 4));
} catch (Throwable t) {
// Chances are that the other end is talking X Protocol instead of MySQL protocol.
// X Protocol message type byte (NOTICE = 11) coincides with MySQL protocol version byte in the Initial Handshake Packet.
if (this.protocolVersion == 11 && IndexOutOfBoundsException.class.isAssignableFrom(t.getClass())) {
throw ExceptionFactory.createException(UnableToConnectException.class,
Messages.getString("NativeCapabilites.001", new Object[] { this.protocolVersion }));
}
throw t;
}
}
public NativePacketPayload getInitialHandshakePacket() {
return this.initialHandshakePacket;
}
@Override
public int getCapabilityFlags() {
return this.capabilityFlags;
}
@Override
public void setCapabilityFlags(int capabilityFlags) {
this.capabilityFlags = capabilityFlags;
}
public ServerVersion getServerVersion() {
return this.serverVersion;
}
public long getThreadId() {
return this.threadId;
}
public void setThreadId(long threadId) {
this.threadId = threadId;
}
public String getSeed() {
return this.seed;
}
/**
*
* @return Collation index which server provided in handshake greeting packet
*/
public int getServerDefaultCollationIndex() {
return this.serverDefaultCollationIndex;
}
public int getStatusFlags() {
return this.statusFlags;
}
public int getAuthPluginDataLength() {
return this.authPluginDataLength;
}
@Override
public boolean serverSupportsFracSecs() {
return this.serverHasFracSecsSupport;
}
}