io.netty.channel.unix.UnixChannelUtil 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 2017 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.channel.unix;
import io.netty.buffer.ByteBuf;
import io.netty.util.internal.PlatformDependent;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.UnknownHostException;
import static io.netty.channel.unix.Limits.IOV_MAX;
public final class UnixChannelUtil {
private UnixChannelUtil() {
}
/**
* Checks if the specified buffer has memory address or is composed of n(n <= IOV_MAX) NIO direct buffers.
* (We check this because otherwise we need to make it a new direct buffer.)
*/
public static boolean isBufferCopyNeededForWrite(ByteBuf byteBuf) {
return isBufferCopyNeededForWrite(byteBuf, IOV_MAX);
}
static boolean isBufferCopyNeededForWrite(ByteBuf byteBuf, int iovMax) {
return !byteBuf.hasMemoryAddress() && (!byteBuf.isDirect() || byteBuf.nioBufferCount() > iovMax);
}
public static InetSocketAddress computeRemoteAddr(InetSocketAddress remoteAddr, InetSocketAddress osRemoteAddr) {
if (osRemoteAddr != null) {
if (PlatformDependent.javaVersion() >= 7) {
try {
// Only try to construct a new InetSocketAddress if we using java >= 7 as getHostString() does not
// exists in earlier releases and so the retrieval of the hostname could block the EventLoop if a
// reverse lookup would be needed.
return new InetSocketAddress(InetAddress.getByAddress(remoteAddr.getHostString(),
osRemoteAddr.getAddress().getAddress()),
osRemoteAddr.getPort());
} catch (UnknownHostException ignore) {
// Should never happen but fallback to osRemoteAddr anyway.
}
}
return osRemoteAddr;
}
return remoteAddr;
}
}