499 lines
18 KiB
Java
499 lines
18 KiB
Java
/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.channel.unix;
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import io.netty.channel.ChannelException;
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import io.netty.util.CharsetUtil;
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import io.netty.util.NetUtil;
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import java.io.IOException;
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import java.net.Inet6Address;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.PortUnreachableException;
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import java.net.SocketAddress;
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import java.nio.ByteBuffer;
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import java.nio.channels.ClosedChannelException;
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import java.util.concurrent.atomic.AtomicBoolean;
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import static io.netty.channel.unix.Errors.ERRNO_EAGAIN_NEGATIVE;
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import static io.netty.channel.unix.Errors.ERROR_ECONNREFUSED_NEGATIVE;
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import static io.netty.channel.unix.Errors.ERRNO_EINPROGRESS_NEGATIVE;
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import static io.netty.channel.unix.Errors.ERRNO_EWOULDBLOCK_NEGATIVE;
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import static io.netty.channel.unix.Errors.ioResult;
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import static io.netty.channel.unix.Errors.newIOException;
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import static io.netty.channel.unix.Errors.throwConnectException;
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import static io.netty.channel.unix.LimitsStaticallyReferencedJniMethods.udsSunPathSize;
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import static io.netty.channel.unix.NativeInetAddress.address;
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import static io.netty.channel.unix.NativeInetAddress.ipv4MappedIpv6Address;
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/**
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* Provides a JNI bridge to native socket operations.
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* <strong>Internal usage only!</strong>
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*/
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public class Socket extends FileDescriptor {
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public static final int UDS_SUN_PATH_SIZE = udsSunPathSize();
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protected final boolean ipv6;
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public Socket(int fd) {
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super(fd);
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this.ipv6 = isIPv6(fd);
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}
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public final void shutdown() throws IOException {
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shutdown(true, true);
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}
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public final void shutdown(boolean read, boolean write) throws IOException {
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for (;;) {
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// We need to only shutdown what has not been shutdown yet, and if there is no change we should not
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// shutdown anything. This is because if the underlying FD is reused and we still have an object which
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// represents the previous incarnation of the FD we need to be sure we don't inadvertently shutdown the
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// "new" FD without explicitly having a change.
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final int oldState = this.state;
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if (isClosed(oldState)) {
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throw new ClosedChannelException();
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}
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int newState = oldState;
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if (read && !isInputShutdown(newState)) {
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newState = inputShutdown(newState);
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}
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if (write && !isOutputShutdown(newState)) {
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newState = outputShutdown(newState);
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}
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// If there is no change in state, then we should not take any action.
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if (newState == oldState) {
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return;
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}
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if (casState(oldState, newState)) {
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break;
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}
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}
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int res = shutdown(fd, read, write);
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if (res < 0) {
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ioResult("shutdown", res);
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}
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}
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public final boolean isShutdown() {
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int state = this.state;
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return isInputShutdown(state) && isOutputShutdown(state);
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}
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public final boolean isInputShutdown() {
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return isInputShutdown(state);
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}
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public final boolean isOutputShutdown() {
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return isOutputShutdown(state);
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}
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public final int sendTo(ByteBuffer buf, int pos, int limit, InetAddress addr, int port) throws IOException {
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// just duplicate the toNativeInetAddress code here to minimize object creation as this method is expected
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// to be called frequently
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byte[] address;
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int scopeId;
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if (addr instanceof Inet6Address) {
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address = addr.getAddress();
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scopeId = ((Inet6Address) addr).getScopeId();
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} else {
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// convert to ipv4 mapped ipv6 address;
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scopeId = 0;
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address = ipv4MappedIpv6Address(addr.getAddress());
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}
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int res = sendTo(fd, ipv6, buf, pos, limit, address, scopeId, port);
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if (res >= 0) {
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return res;
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}
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if (res == ERROR_ECONNREFUSED_NEGATIVE) {
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throw new PortUnreachableException("sendTo failed");
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}
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return ioResult("sendTo", res);
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}
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public final int sendToAddress(long memoryAddress, int pos, int limit, InetAddress addr, int port)
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throws IOException {
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// just duplicate the toNativeInetAddress code here to minimize object creation as this method is expected
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// to be called frequently
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byte[] address;
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int scopeId;
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if (addr instanceof Inet6Address) {
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address = addr.getAddress();
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scopeId = ((Inet6Address) addr).getScopeId();
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} else {
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// convert to ipv4 mapped ipv6 address;
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scopeId = 0;
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address = ipv4MappedIpv6Address(addr.getAddress());
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}
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int res = sendToAddress(fd, ipv6, memoryAddress, pos, limit, address, scopeId, port);
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if (res >= 0) {
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return res;
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}
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if (res == ERROR_ECONNREFUSED_NEGATIVE) {
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throw new PortUnreachableException("sendToAddress failed");
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}
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return ioResult("sendToAddress", res);
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}
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public final int sendToAddresses(long memoryAddress, int length, InetAddress addr, int port) throws IOException {
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// just duplicate the toNativeInetAddress code here to minimize object creation as this method is expected
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// to be called frequently
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byte[] address;
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int scopeId;
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if (addr instanceof Inet6Address) {
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address = addr.getAddress();
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scopeId = ((Inet6Address) addr).getScopeId();
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} else {
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// convert to ipv4 mapped ipv6 address;
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scopeId = 0;
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address = ipv4MappedIpv6Address(addr.getAddress());
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}
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int res = sendToAddresses(fd, ipv6, memoryAddress, length, address, scopeId, port);
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if (res >= 0) {
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return res;
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}
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if (res == ERROR_ECONNREFUSED_NEGATIVE) {
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throw new PortUnreachableException("sendToAddresses failed");
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}
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return ioResult("sendToAddresses", res);
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}
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public final DatagramSocketAddress recvFrom(ByteBuffer buf, int pos, int limit) throws IOException {
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return recvFrom(fd, buf, pos, limit);
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}
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public final DatagramSocketAddress recvFromAddress(long memoryAddress, int pos, int limit) throws IOException {
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return recvFromAddress(fd, memoryAddress, pos, limit);
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}
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public final int recvFd() throws IOException {
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int res = recvFd(fd);
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if (res > 0) {
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return res;
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}
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if (res == 0) {
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return -1;
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}
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if (res == ERRNO_EAGAIN_NEGATIVE || res == ERRNO_EWOULDBLOCK_NEGATIVE) {
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// Everything consumed so just return -1 here.
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return 0;
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}
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throw newIOException("recvFd", res);
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}
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public final int sendFd(int fdToSend) throws IOException {
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int res = sendFd(fd, fdToSend);
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if (res >= 0) {
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return res;
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}
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if (res == ERRNO_EAGAIN_NEGATIVE || res == ERRNO_EWOULDBLOCK_NEGATIVE) {
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// Everything consumed so just return -1 here.
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return -1;
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}
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throw newIOException("sendFd", res);
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}
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public final boolean connect(SocketAddress socketAddress) throws IOException {
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int res;
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if (socketAddress instanceof InetSocketAddress) {
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InetSocketAddress inetSocketAddress = (InetSocketAddress) socketAddress;
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NativeInetAddress address = NativeInetAddress.newInstance(inetSocketAddress.getAddress());
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res = connect(fd, ipv6, address.address, address.scopeId, inetSocketAddress.getPort());
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} else if (socketAddress instanceof DomainSocketAddress) {
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DomainSocketAddress unixDomainSocketAddress = (DomainSocketAddress) socketAddress;
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res = connectDomainSocket(fd, unixDomainSocketAddress.path().getBytes(CharsetUtil.UTF_8));
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} else {
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throw new Error("Unexpected SocketAddress implementation " + socketAddress);
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}
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if (res < 0) {
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if (res == ERRNO_EINPROGRESS_NEGATIVE) {
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// connect not complete yet need to wait for EPOLLOUT event
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return false;
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}
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throwConnectException("connect", res);
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}
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return true;
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}
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public final boolean finishConnect() throws IOException {
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int res = finishConnect(fd);
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if (res < 0) {
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if (res == ERRNO_EINPROGRESS_NEGATIVE) {
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// connect still in progress
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return false;
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}
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throwConnectException("finishConnect", res);
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}
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return true;
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}
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public final void disconnect() throws IOException {
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int res = disconnect(fd, ipv6);
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if (res < 0) {
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throwConnectException("disconnect", res);
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}
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}
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public final void bind(SocketAddress socketAddress) throws IOException {
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if (socketAddress instanceof InetSocketAddress) {
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InetSocketAddress addr = (InetSocketAddress) socketAddress;
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NativeInetAddress address = NativeInetAddress.newInstance(addr.getAddress());
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int res = bind(fd, ipv6, address.address, address.scopeId, addr.getPort());
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if (res < 0) {
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throw newIOException("bind", res);
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}
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} else if (socketAddress instanceof DomainSocketAddress) {
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DomainSocketAddress addr = (DomainSocketAddress) socketAddress;
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int res = bindDomainSocket(fd, addr.path().getBytes(CharsetUtil.UTF_8));
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if (res < 0) {
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throw newIOException("bind", res);
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}
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} else {
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throw new Error("Unexpected SocketAddress implementation " + socketAddress);
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}
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}
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public final void listen(int backlog) throws IOException {
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int res = listen(fd, backlog);
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if (res < 0) {
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throw newIOException("listen", res);
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}
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}
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public final int accept(byte[] addr) throws IOException {
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int res = accept(fd, addr);
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if (res >= 0) {
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return res;
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}
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if (res == ERRNO_EAGAIN_NEGATIVE || res == ERRNO_EWOULDBLOCK_NEGATIVE) {
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// Everything consumed so just return -1 here.
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return -1;
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}
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throw newIOException("accept", res);
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}
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public final InetSocketAddress remoteAddress() {
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byte[] addr = remoteAddress(fd);
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// addr may be null if getpeername failed.
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// See https://github.com/netty/netty/issues/3328
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return addr == null ? null : address(addr, 0, addr.length);
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}
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public final InetSocketAddress localAddress() {
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byte[] addr = localAddress(fd);
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// addr may be null if getpeername failed.
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// See https://github.com/netty/netty/issues/3328
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return addr == null ? null : address(addr, 0, addr.length);
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}
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public final int getReceiveBufferSize() throws IOException {
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return getReceiveBufferSize(fd);
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}
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public final int getSendBufferSize() throws IOException {
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return getSendBufferSize(fd);
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}
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public final boolean isKeepAlive() throws IOException {
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return isKeepAlive(fd) != 0;
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}
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public final boolean isTcpNoDelay() throws IOException {
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return isTcpNoDelay(fd) != 0;
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}
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public final boolean isReuseAddress() throws IOException {
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return isReuseAddress(fd) != 0;
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}
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public final boolean isReusePort() throws IOException {
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return isReusePort(fd) != 0;
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}
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public final boolean isBroadcast() throws IOException {
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return isBroadcast(fd) != 0;
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}
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public final int getSoLinger() throws IOException {
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return getSoLinger(fd);
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}
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public final int getSoError() throws IOException {
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return getSoError(fd);
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}
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public final int getTrafficClass() throws IOException {
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return getTrafficClass(fd, ipv6);
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}
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public final void setKeepAlive(boolean keepAlive) throws IOException {
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setKeepAlive(fd, keepAlive ? 1 : 0);
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}
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public final void setReceiveBufferSize(int receiveBufferSize) throws IOException {
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setReceiveBufferSize(fd, receiveBufferSize);
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}
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public final void setSendBufferSize(int sendBufferSize) throws IOException {
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setSendBufferSize(fd, sendBufferSize);
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}
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public final void setTcpNoDelay(boolean tcpNoDelay) throws IOException {
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setTcpNoDelay(fd, tcpNoDelay ? 1 : 0);
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}
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public final void setSoLinger(int soLinger) throws IOException {
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setSoLinger(fd, soLinger);
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}
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public final void setReuseAddress(boolean reuseAddress) throws IOException {
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setReuseAddress(fd, reuseAddress ? 1 : 0);
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}
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public final void setReusePort(boolean reusePort) throws IOException {
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setReusePort(fd, reusePort ? 1 : 0);
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}
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public final void setBroadcast(boolean broadcast) throws IOException {
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setBroadcast(fd, broadcast ? 1 : 0);
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}
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public final void setTrafficClass(int trafficClass) throws IOException {
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setTrafficClass(fd, ipv6, trafficClass);
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}
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public static native boolean isIPv6Preferred();
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private static native boolean isIPv6(int fd);
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@Override
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public String toString() {
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return "Socket{" +
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"fd=" + fd +
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'}';
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}
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private static final AtomicBoolean INITIALIZED = new AtomicBoolean();
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public static Socket newSocketStream() {
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return new Socket(newSocketStream0());
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}
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public static Socket newSocketDgram() {
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return new Socket(newSocketDgram0());
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}
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public static Socket newSocketDomain() {
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return new Socket(newSocketDomain0());
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}
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public static void initialize() {
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if (INITIALIZED.compareAndSet(false, true)) {
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initialize(NetUtil.isIpV4StackPreferred());
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}
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}
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protected static int newSocketStream0() {
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return newSocketStream0(isIPv6Preferred());
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}
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protected static int newSocketStream0(boolean ipv6) {
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int res = newSocketStreamFd(ipv6);
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if (res < 0) {
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throw new ChannelException(newIOException("newSocketStream", res));
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}
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return res;
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}
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protected static int newSocketDgram0() {
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return newSocketDgram0(isIPv6Preferred());
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}
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protected static int newSocketDgram0(boolean ipv6) {
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int res = newSocketDgramFd(ipv6);
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if (res < 0) {
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throw new ChannelException(newIOException("newSocketDgram", res));
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}
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return res;
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}
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protected static int newSocketDomain0() {
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int res = newSocketDomainFd();
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if (res < 0) {
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throw new ChannelException(newIOException("newSocketDomain", res));
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}
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return res;
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}
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private static native int shutdown(int fd, boolean read, boolean write);
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private static native int connect(int fd, boolean ipv6, byte[] address, int scopeId, int port);
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private static native int connectDomainSocket(int fd, byte[] path);
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private static native int finishConnect(int fd);
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private static native int disconnect(int fd, boolean ipv6);
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private static native int bind(int fd, boolean ipv6, byte[] address, int scopeId, int port);
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private static native int bindDomainSocket(int fd, byte[] path);
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private static native int listen(int fd, int backlog);
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private static native int accept(int fd, byte[] addr);
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private static native byte[] remoteAddress(int fd);
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private static native byte[] localAddress(int fd);
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private static native int sendTo(
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int fd, boolean ipv6, ByteBuffer buf, int pos, int limit, byte[] address, int scopeId, int port);
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private static native int sendToAddress(
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int fd, boolean ipv6, long memoryAddress, int pos, int limit, byte[] address, int scopeId, int port);
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private static native int sendToAddresses(
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int fd, boolean ipv6, long memoryAddress, int length, byte[] address, int scopeId, int port);
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private static native DatagramSocketAddress recvFrom(
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int fd, ByteBuffer buf, int pos, int limit) throws IOException;
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private static native DatagramSocketAddress recvFromAddress(
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int fd, long memoryAddress, int pos, int limit) throws IOException;
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private static native int recvFd(int fd);
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private static native int sendFd(int socketFd, int fd);
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private static native int newSocketStreamFd(boolean ipv6);
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private static native int newSocketDgramFd(boolean ipv6);
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private static native int newSocketDomainFd();
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private static native int isReuseAddress(int fd) throws IOException;
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private static native int isReusePort(int fd) throws IOException;
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private static native int getReceiveBufferSize(int fd) throws IOException;
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private static native int getSendBufferSize(int fd) throws IOException;
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private static native int isKeepAlive(int fd) throws IOException;
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private static native int isTcpNoDelay(int fd) throws IOException;
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private static native int isBroadcast(int fd) throws IOException;
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private static native int getSoLinger(int fd) throws IOException;
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private static native int getSoError(int fd) throws IOException;
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private static native int getTrafficClass(int fd, boolean ipv6) throws IOException;
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private static native void setReuseAddress(int fd, int reuseAddress) throws IOException;
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private static native void setReusePort(int fd, int reuseAddress) throws IOException;
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private static native void setKeepAlive(int fd, int keepAlive) throws IOException;
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private static native void setReceiveBufferSize(int fd, int receiveBufferSize) throws IOException;
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private static native void setSendBufferSize(int fd, int sendBufferSize) throws IOException;
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private static native void setTcpNoDelay(int fd, int tcpNoDelay) throws IOException;
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private static native void setSoLinger(int fd, int soLinger) throws IOException;
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private static native void setBroadcast(int fd, int broadcast) throws IOException;
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private static native void setTrafficClass(int fd, boolean ipv6, int trafficClass) throws IOException;
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private static native void initialize(boolean ipv4Preferred);
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}
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