io.netty.handler.codec.socksx.v5.Socks5AddressDecoder Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Copyright 2015 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.handler.codec.socksx.v5;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.handler.codec.DecoderException;
import io.netty.util.CharsetUtil;
import io.netty.util.NetUtil;
/**
* Decodes a SOCKS5 address field into its string representation.
*
* @see Socks5CommandRequestDecoder
* @see Socks5CommandResponseDecoder
*/
public interface Socks5AddressDecoder {
Socks5AddressDecoder DEFAULT = new Socks5AddressDecoder() {
private static final int IPv6_LEN = 16;
@Override
public String decodeAddress(Socks5AddressType addrType, ByteBuf in) throws Exception {
if (addrType == Socks5AddressType.IPv4) {
return NetUtil.intToIpAddress(ByteBufUtil.readIntBE(in));
}
if (addrType == Socks5AddressType.DOMAIN) {
final int length = in.readUnsignedByte();
final String domain = in.toString(in.readerIndex(), length, CharsetUtil.US_ASCII);
in.skipBytes(length);
return domain;
}
if (addrType == Socks5AddressType.IPv6) {
if (in.hasArray()) {
final int readerIdx = in.readerIndex();
in.readerIndex(readerIdx + IPv6_LEN);
return NetUtil.bytesToIpAddress(in.array(), in.arrayOffset() + readerIdx, IPv6_LEN);
} else {
byte[] tmp = new byte[IPv6_LEN];
in.readBytes(tmp);
return NetUtil.bytesToIpAddress(tmp);
}
} else {
throw new DecoderException("unsupported address type: " + (addrType.byteValue() & 0xFF));
}
}
};
/**
* Decodes a SOCKS5 address field into its string representation.
*
* @param addrType the type of the address
* @param in the input buffer which contains the SOCKS5 address field at its reader index
*/
String decodeAddress(Socks5AddressType addrType, ByteBuf in) throws Exception;
}