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/*
* Copyright 2016 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.kqueue;
import io.netty.channel.DefaultFileRegion;
import io.netty.channel.unix.FileDescriptor;
import io.netty.channel.unix.PeerCredentials;
import io.netty.channel.unix.Unix;
import io.netty.util.internal.ClassInitializerUtil;
import io.netty.util.internal.NativeLibraryLoader;
import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.ThrowableUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
import java.io.IOException;
import java.nio.channels.FileChannel;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.connectDataIdempotent;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.connectResumeOnReadWrite;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evAdd;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evClear;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evDelete;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evDisable;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evEOF;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evEnable;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evError;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evfiltRead;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evfiltSock;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evfiltUser;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.evfiltWrite;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.fastOpenClient;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.fastOpenServer;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.noteConnReset;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.noteDisconnected;
import static io.netty.channel.kqueue.KQueueStaticallyReferencedJniMethods.noteReadClosed;
import static io.netty.channel.unix.Errors.newIOException;
/**
* Native helper methods
* Internal usage only!
*/
final class Native {
private static final InternalLogger logger = InternalLoggerFactory.getInstance(Native.class);
static {
// Preload all classes that will be used in the OnLoad(...) function of JNI to eliminate the possiblity of a
// class-loader deadlock. This is a workaround for https://github.com/netty/netty/issues/11209.
// This needs to match all the classes that are loaded via NETTY_JNI_UTIL_LOAD_CLASS or looked up via
// NETTY_JNI_UTIL_FIND_CLASS.
ClassInitializerUtil.tryLoadClasses(Native.class,
// netty_kqueue_bsdsocket
PeerCredentials.class, DefaultFileRegion.class, FileChannel.class, java.io.FileDescriptor.class
);
try {
// First, try calling a side-effect free JNI method to see if the library was already
// loaded by the application.
sizeofKEvent();
} catch (UnsatisfiedLinkError ignore) {
// The library was not previously loaded, load it now.
loadNativeLibrary();
}
Unix.registerInternal(new Runnable() {
@Override
public void run() {
registerUnix();
}
});
}
private static native int registerUnix();
static final short EV_ADD = evAdd();
static final short EV_ENABLE = evEnable();
static final short EV_DISABLE = evDisable();
static final short EV_DELETE = evDelete();
static final short EV_CLEAR = evClear();
static final short EV_ERROR = evError();
static final short EV_EOF = evEOF();
static final int NOTE_READCLOSED = noteReadClosed();
static final int NOTE_CONNRESET = noteConnReset();
static final int NOTE_DISCONNECTED = noteDisconnected();
static final int NOTE_RDHUP = NOTE_READCLOSED | NOTE_CONNRESET | NOTE_DISCONNECTED;
// Commonly used combinations of EV defines
static final short EV_ADD_CLEAR_ENABLE = (short) (EV_ADD | EV_CLEAR | EV_ENABLE);
static final short EV_DELETE_DISABLE = (short) (EV_DELETE | EV_DISABLE);
static final short EVFILT_READ = evfiltRead();
static final short EVFILT_WRITE = evfiltWrite();
static final short EVFILT_USER = evfiltUser();
static final short EVFILT_SOCK = evfiltSock();
// Flags for connectx(2)
private static final int CONNECT_RESUME_ON_READ_WRITE = connectResumeOnReadWrite();
private static final int CONNECT_DATA_IDEMPOTENT = connectDataIdempotent();
static final int CONNECT_TCP_FASTOPEN = CONNECT_RESUME_ON_READ_WRITE | CONNECT_DATA_IDEMPOTENT;
static final boolean IS_SUPPORTING_TCP_FASTOPEN_CLIENT = isSupportingFastOpenClient();
static final boolean IS_SUPPORTING_TCP_FASTOPEN_SERVER = isSupportingFastOpenServer();
static FileDescriptor newKQueue() {
return new FileDescriptor(kqueueCreate());
}
static int keventWait(int kqueueFd, KQueueEventArray changeList, KQueueEventArray eventList,
int tvSec, int tvNsec) throws IOException {
int ready = keventWait(kqueueFd, changeList.memoryAddress(), changeList.size(),
eventList.memoryAddress(), eventList.capacity(), tvSec, tvNsec);
if (ready < 0) {
throw newIOException("kevent", ready);
}
return ready;
}
private static native int kqueueCreate();
private static native int keventWait(int kqueueFd, long changeListAddress, int changeListLength,
long eventListAddress, int eventListLength, int tvSec, int tvNsec);
static native int keventTriggerUserEvent(int kqueueFd, int ident);
static native int keventAddUserEvent(int kqueueFd, int ident);
// kevent related
static native int sizeofKEvent();
static native int offsetofKEventIdent();
static native int offsetofKEventFlags();
static native int offsetofKEventFFlags();
static native int offsetofKEventFilter();
static native int offsetofKeventData();
private static void loadNativeLibrary() {
String name = PlatformDependent.normalizedOs();
if (!"osx".equals(name) && !name.contains("bsd")) {
throw new IllegalStateException("Only supported on OSX/BSD");
}
String staticLibName = "netty_transport_native_kqueue";
String sharedLibName = staticLibName + '_' + PlatformDependent.normalizedArch();
ClassLoader cl = PlatformDependent.getClassLoader(Native.class);
try {
NativeLibraryLoader.load(sharedLibName, cl);
} catch (UnsatisfiedLinkError e1) {
try {
NativeLibraryLoader.load(staticLibName, cl);
logger.debug("Failed to load {}", sharedLibName, e1);
} catch (UnsatisfiedLinkError e2) {
ThrowableUtil.addSuppressed(e1, e2);
throw e1;
}
}
}
private static boolean isSupportingFastOpenClient() {
try {
return fastOpenClient() == 1;
} catch (Exception e) {
logger.debug("Failed to probe fastOpenClient sysctl, assuming client-side TCP FastOpen cannot be used.", e);
}
return false;
}
private static boolean isSupportingFastOpenServer() {
try {
return fastOpenServer() == 1;
} catch (Exception e) {
logger.debug("Failed to probe fastOpenServer sysctl, assuming server-side TCP FastOpen cannot be used.", e);
}
return false;
}
private Native() {
// utility
}
}