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/*
* 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:
*
* http://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.channel.ChannelException;
import io.netty.util.CharsetUtil;
import java.io.IOException;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.ClosedChannelException;
import static io.netty.channel.unix.Errors.ERRNO_EAGAIN_NEGATIVE;
import static io.netty.channel.unix.Errors.ERRNO_EINPROGRESS_NEGATIVE;
import static io.netty.channel.unix.Errors.ERRNO_EWOULDBLOCK_NEGATIVE;
import static io.netty.channel.unix.Errors.ioResult;
import static io.netty.channel.unix.Errors.throwConnectException;
import static io.netty.channel.unix.Errors.newIOException;
import static io.netty.channel.unix.NativeInetAddress.address;
import static io.netty.channel.unix.NativeInetAddress.ipv4MappedIpv6Address;
import static io.netty.util.internal.ThrowableUtil.unknownStackTrace;
/**
* Provides a JNI bridge to native socket operations.
* Internal usage only!
*/
public final class Socket extends FileDescriptor {
private static final ClosedChannelException SHUTDOWN_CLOSED_CHANNEL_EXCEPTION = unknownStackTrace(
new ClosedChannelException(), Socket.class, "shutdown(..)");
private static final ClosedChannelException SEND_TO_CLOSED_CHANNEL_EXCEPTION = unknownStackTrace(
new ClosedChannelException(), Socket.class, "sendTo(..)");
private static final ClosedChannelException SEND_TO_ADDRESS_CLOSED_CHANNEL_EXCEPTION =
unknownStackTrace(new ClosedChannelException(), Socket.class, "sendToAddress(..)");
private static final ClosedChannelException SEND_TO_ADDRESSES_CLOSED_CHANNEL_EXCEPTION =
unknownStackTrace(new ClosedChannelException(), Socket.class, "sendToAddresses(..)");
private static final Errors.NativeIoException SEND_TO_CONNECTION_RESET_EXCEPTION = unknownStackTrace(
Errors.newConnectionResetException("syscall:sendto", Errors.ERRNO_EPIPE_NEGATIVE),
Socket.class, "sendTo(..)");
private static final Errors.NativeIoException SEND_TO_ADDRESS_CONNECTION_RESET_EXCEPTION =
unknownStackTrace(Errors.newConnectionResetException("syscall:sendto",
Errors.ERRNO_EPIPE_NEGATIVE), Socket.class, "sendToAddress");
private static final Errors.NativeIoException CONNECTION_RESET_EXCEPTION_SENDMSG = unknownStackTrace(
Errors.newConnectionResetException("syscall:sendmsg",
Errors.ERRNO_EPIPE_NEGATIVE), Socket.class, "sendToAddresses(..)");
private static final Errors.NativeIoException CONNECTION_RESET_SHUTDOWN_EXCEPTION =
unknownStackTrace(Errors.newConnectionResetException("syscall:shutdown",
Errors.ERRNO_ECONNRESET_NEGATIVE), Socket.class, "shutdown");
private static final Errors.NativeConnectException FINISH_CONNECT_REFUSED_EXCEPTION =
unknownStackTrace(new Errors.NativeConnectException("syscall:getsockopt",
Errors.ERROR_ECONNREFUSED_NEGATIVE), Socket.class, "finishConnect(..)");
private static final Errors.NativeConnectException CONNECT_REFUSED_EXCEPTION =
unknownStackTrace(new Errors.NativeConnectException("syscall:connect",
Errors.ERROR_ECONNREFUSED_NEGATIVE), Socket.class, "connect(..)");
public Socket(int fd) {
super(fd);
}
public void shutdown() throws IOException {
shutdown(true, true);
}
public void shutdown(boolean read, boolean write) throws IOException {
for (;;) {
// We need to only shutdown what has not been shutdown yet, and if there is no change we should not
// shutdown anything. This is because if the underlying FD is reused and we still have an object which
// represents the previous incarnation of the FD we need to be sure we don't inadvertently shutdown the
// "new" FD without explicitly having a change.
final int oldState = this.state;
if (isClosed(oldState)) {
throw new ClosedChannelException();
}
int newState = oldState;
if (read && !isInputShutdown(newState)) {
newState = inputShutdown(newState);
}
if (write && !isOutputShutdown(newState)) {
newState = outputShutdown(newState);
}
// If there is no change in state, then we should not take any action.
if (newState == oldState) {
return;
}
if (casState(oldState, newState)) {
break;
}
}
int res = shutdown(fd, read, write);
if (res < 0) {
ioResult("shutdown", res, CONNECTION_RESET_SHUTDOWN_EXCEPTION, SHUTDOWN_CLOSED_CHANNEL_EXCEPTION);
}
}
public boolean isShutdown() {
int state = this.state;
return isInputShutdown(state) && isOutputShutdown(state);
}
public boolean isInputShutdown() {
return isInputShutdown(state);
}
public boolean isOutputShutdown() {
return isOutputShutdown(state);
}
public int sendTo(ByteBuffer buf, int pos, int limit, InetAddress addr, int port) throws IOException {
// just duplicate the toNativeInetAddress code here to minimize object creation as this method is expected
// to be called frequently
byte[] address;
int scopeId;
if (addr instanceof Inet6Address) {
address = addr.getAddress();
scopeId = ((Inet6Address) addr).getScopeId();
} else {
// convert to ipv4 mapped ipv6 address;
scopeId = 0;
address = ipv4MappedIpv6Address(addr.getAddress());
}
int res = sendTo(fd, buf, pos, limit, address, scopeId, port);
if (res >= 0) {
return res;
}
return ioResult("sendTo", res, SEND_TO_CONNECTION_RESET_EXCEPTION, SEND_TO_CLOSED_CHANNEL_EXCEPTION);
}
public int sendToAddress(long memoryAddress, int pos, int limit, InetAddress addr, int port)
throws IOException {
// just duplicate the toNativeInetAddress code here to minimize object creation as this method is expected
// to be called frequently
byte[] address;
int scopeId;
if (addr instanceof Inet6Address) {
address = addr.getAddress();
scopeId = ((Inet6Address) addr).getScopeId();
} else {
// convert to ipv4 mapped ipv6 address;
scopeId = 0;
address = ipv4MappedIpv6Address(addr.getAddress());
}
int res = sendToAddress(fd, memoryAddress, pos, limit, address, scopeId, port);
if (res >= 0) {
return res;
}
return ioResult("sendToAddress", res,
SEND_TO_ADDRESS_CONNECTION_RESET_EXCEPTION, SEND_TO_ADDRESS_CLOSED_CHANNEL_EXCEPTION);
}
public int sendToAddresses(long memoryAddress, int length, InetAddress addr, int port) throws IOException {
// just duplicate the toNativeInetAddress code here to minimize object creation as this method is expected
// to be called frequently
byte[] address;
int scopeId;
if (addr instanceof Inet6Address) {
address = addr.getAddress();
scopeId = ((Inet6Address) addr).getScopeId();
} else {
// convert to ipv4 mapped ipv6 address;
scopeId = 0;
address = ipv4MappedIpv6Address(addr.getAddress());
}
int res = sendToAddresses(fd, memoryAddress, length, address, scopeId, port);
if (res >= 0) {
return res;
}
return ioResult("sendToAddresses", res,
CONNECTION_RESET_EXCEPTION_SENDMSG, SEND_TO_ADDRESSES_CLOSED_CHANNEL_EXCEPTION);
}
public DatagramSocketAddress recvFrom(ByteBuffer buf, int pos, int limit) throws IOException {
return recvFrom(fd, buf, pos, limit);
}
public DatagramSocketAddress recvFromAddress(long memoryAddress, int pos, int limit) throws IOException {
return recvFromAddress(fd, memoryAddress, pos, limit);
}
public boolean connect(SocketAddress socketAddress) throws IOException {
int res;
if (socketAddress instanceof InetSocketAddress) {
InetSocketAddress inetSocketAddress = (InetSocketAddress) socketAddress;
NativeInetAddress address = NativeInetAddress.newInstance(inetSocketAddress.getAddress());
res = connect(fd, address.address, address.scopeId, inetSocketAddress.getPort());
} else if (socketAddress instanceof DomainSocketAddress) {
DomainSocketAddress unixDomainSocketAddress = (DomainSocketAddress) socketAddress;
res = connectDomainSocket(fd, unixDomainSocketAddress.path().getBytes(CharsetUtil.UTF_8));
} else {
throw new Error("Unexpected SocketAddress implementation " + socketAddress);
}
if (res < 0) {
if (res == ERRNO_EINPROGRESS_NEGATIVE) {
// connect not complete yet need to wait for EPOLLOUT event
return false;
}
throwConnectException("connect", CONNECT_REFUSED_EXCEPTION, res);
}
return true;
}
public boolean finishConnect() throws IOException {
int res = finishConnect(fd);
if (res < 0) {
if (res == ERRNO_EINPROGRESS_NEGATIVE) {
// connect still in progress
return false;
}
throwConnectException("finishConnect", FINISH_CONNECT_REFUSED_EXCEPTION, res);
}
return true;
}
public void bind(SocketAddress socketAddress) throws IOException {
if (socketAddress instanceof InetSocketAddress) {
InetSocketAddress addr = (InetSocketAddress) socketAddress;
NativeInetAddress address = NativeInetAddress.newInstance(addr.getAddress());
int res = bind(fd, address.address, address.scopeId, addr.getPort());
if (res < 0) {
throw newIOException("bind", res);
}
} else if (socketAddress instanceof DomainSocketAddress) {
DomainSocketAddress addr = (DomainSocketAddress) socketAddress;
int res = bindDomainSocket(fd, addr.path().getBytes(CharsetUtil.UTF_8));
if (res < 0) {
throw newIOException("bind", res);
}
} else {
throw new Error("Unexpected SocketAddress implementation " + socketAddress);
}
}
public void listen(int backlog) throws IOException {
int res = listen(fd, backlog);
if (res < 0) {
throw newIOException("listen", res);
}
}
public int accept(byte[] addr) throws IOException {
int res = accept(fd, addr);
if (res >= 0) {
return res;
}
if (res == ERRNO_EAGAIN_NEGATIVE || res == ERRNO_EWOULDBLOCK_NEGATIVE) {
// Everything consumed so just return -1 here.
return -1;
}
throw newIOException("accept", res);
}
public InetSocketAddress remoteAddress() {
byte[] addr = remoteAddress(fd);
// addr may be null if getpeername failed.
// See https://github.com/netty/netty/issues/3328
if (addr == null) {
return null;
}
return address(addr, 0, addr.length);
}
public InetSocketAddress localAddress() {
byte[] addr = localAddress(fd);
// addr may be null if getpeername failed.
// See https://github.com/netty/netty/issues/3328
if (addr == null) {
return null;
}
return address(addr, 0, addr.length);
}
public int getReceiveBufferSize() throws IOException {
return getReceiveBufferSize(fd);
}
public int getSendBufferSize() throws IOException {
return getSendBufferSize(fd);
}
public boolean isKeepAlive() throws IOException {
return isKeepAlive(fd) != 0;
}
public boolean isTcpNoDelay() throws IOException {
return isTcpNoDelay(fd) != 0;
}
public boolean isTcpCork() throws IOException {
return isTcpCork(fd) != 0;
}
public int getSoLinger() throws IOException {
return getSoLinger(fd);
}
public int getTcpDeferAccept() throws IOException {
return getTcpDeferAccept(fd);
}
public boolean isTcpQuickAck() throws IOException {
return isTcpQuickAck(fd) != 0;
}
public int getSoError() throws IOException {
return getSoError(fd);
}
public PeerCredentials getPeerCredentials() throws IOException {
return getPeerCredentials(fd);
}
public void setKeepAlive(boolean keepAlive) throws IOException {
setKeepAlive(fd, keepAlive ? 1 : 0);
}
public void setReceiveBufferSize(int receiveBufferSize) throws IOException {
setReceiveBufferSize(fd, receiveBufferSize);
}
public void setSendBufferSize(int sendBufferSize) throws IOException {
setSendBufferSize(fd, sendBufferSize);
}
public void setTcpNoDelay(boolean tcpNoDelay) throws IOException {
setTcpNoDelay(fd, tcpNoDelay ? 1 : 0);
}
public void setTcpCork(boolean tcpCork) throws IOException {
setTcpCork(fd, tcpCork ? 1 : 0);
}
public void setSoLinger(int soLinger) throws IOException {
setSoLinger(fd, soLinger);
}
public void setTcpDeferAccept(int deferAccept) throws IOException {
setTcpDeferAccept(fd, deferAccept);
}
public void setTcpQuickAck(boolean quickAck) throws IOException {
setTcpQuickAck(fd, quickAck ? 1 : 0);
}
@Override
public String toString() {
return "Socket{" +
"fd=" + fd +
'}';
}
public static Socket newSocketStream() {
int res = newSocketStreamFd();
if (res < 0) {
throw new ChannelException(newIOException("newSocketStream", res));
}
return new Socket(res);
}
public static Socket newSocketDgram() {
int res = newSocketDgramFd();
if (res < 0) {
throw new ChannelException(newIOException("newSocketDgram", res));
}
return new Socket(res);
}
public static Socket newSocketDomain() {
int res = newSocketDomainFd();
if (res < 0) {
throw new ChannelException(newIOException("newSocketDomain", res));
}
return new Socket(res);
}
private static native int shutdown(int fd, boolean read, boolean write);
private static native int connect(int fd, byte[] address, int scopeId, int port);
private static native int connectDomainSocket(int fd, byte[] path);
private static native int finishConnect(int fd);
private static native int bind(int fd, byte[] address, int scopeId, int port);
private static native int bindDomainSocket(int fd, byte[] path);
private static native int listen(int fd, int backlog);
private static native int accept(int fd, byte[] addr);
private static native byte[] remoteAddress(int fd);
private static native byte[] localAddress(int fd);
private static native int sendTo(
int fd, ByteBuffer buf, int pos, int limit, byte[] address, int scopeId, int port);
private static native int sendToAddress(
int fd, long memoryAddress, int pos, int limit, byte[] address, int scopeId, int port);
private static native int sendToAddresses(
int fd, long memoryAddress, int length, byte[] address, int scopeId, int port);
private static native DatagramSocketAddress recvFrom(
int fd, ByteBuffer buf, int pos, int limit) throws IOException;
private static native DatagramSocketAddress recvFromAddress(
int fd, long memoryAddress, int pos, int limit) throws IOException;
private static native int newSocketStreamFd();
private static native int newSocketDgramFd();
private static native int newSocketDomainFd();
private static native int getReceiveBufferSize(int fd) throws IOException;
private static native int getSendBufferSize(int fd) throws IOException;
private static native int isKeepAlive(int fd) throws IOException;
private static native int isTcpNoDelay(int fd) throws IOException;
private static native int isTcpCork(int fd) throws IOException;
private static native int getSoLinger(int fd) throws IOException;
private static native int getSoError(int fd) throws IOException;
private static native int getTcpDeferAccept(int fd) throws IOException;
private static native int isTcpQuickAck(int fd) throws IOException;
private static native PeerCredentials getPeerCredentials(int fd) throws IOException;
private static native void setKeepAlive(int fd, int keepAlive) throws IOException;
private static native void setReceiveBufferSize(int fd, int receiveBufferSize) throws IOException;
private static native void setSendBufferSize(int fd, int sendBufferSize) throws IOException;
private static native void setTcpNoDelay(int fd, int tcpNoDelay) throws IOException;
private static native void setTcpCork(int fd, int tcpCork) throws IOException;
private static native void setSoLinger(int fd, int soLinger) throws IOException;
private static native void setTcpDeferAccept(int fd, int deferAccept) throws IOException;
private static native void setTcpQuickAck(int fd, int quickAck) throws IOException;
}
