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The Qbicc builder for the java.base JDK module
/*
* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.nio.ch;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.ProtocolFamily;
import java.net.SocketException;
import java.net.StandardProtocolFamily;
import java.net.UnknownHostException;
import java.nio.channels.UnsupportedAddressTypeException;
import jdk.internal.access.JavaNetInetAddressAccess;
import jdk.internal.access.SharedSecrets;
import jdk.internal.misc.Unsafe;
import jdk.internal.util.ArraysSupport;
/**
* A native socket address that is the union of struct sockaddr, struct sockaddr_in,
* and struct sockaddr_in6.
*
* This class is not thread safe.
*/
class NativeSocketAddress {
private static final JavaNetInetAddressAccess JNINA = SharedSecrets.getJavaNetInetAddressAccess();
private static final Unsafe UNSAFE = Unsafe.getUnsafe();
private static final long ARRAY_BASE_OFFSET = UNSAFE.arrayBaseOffset(byte[].class);
private static final int AF_INET = AFINET();
private static final int AF_INET6 = AFINET6();
private static final int SIZEOF_SOCKADDR4 = sizeofSockAddr4();
private static final int SIZEOF_SOCKADDR6 = sizeofSockAddr6();
private static final int SIZEOF_SOCKETADDRESS = Math.max(SIZEOF_SOCKADDR4, SIZEOF_SOCKADDR6);
private static final int SIZEOF_FAMILY = sizeofFamily();
private static final int OFFSET_FAMILY = offsetFamily();
private static final int OFFSET_SIN4_PORT = offsetSin4Port();
private static final int OFFSET_SIN4_ADDR = offsetSin4Addr();
private static final int OFFSET_SIN6_PORT = offsetSin6Port();
private static final int OFFSET_SIN6_ADDR = offsetSin6Addr();
private static final int OFFSET_SIN6_SCOPE_ID = offsetSin6ScopeId();
private static final int OFFSET_SIN6_FLOWINFO = offsetSin6FlowInfo();
// SOCKETADDRESS
private final long address;
long address() {
return address;
}
NativeSocketAddress() {
long base = UNSAFE.allocateMemory(SIZEOF_SOCKETADDRESS);
UNSAFE.setMemory(base, SIZEOF_SOCKETADDRESS, (byte) 0);
this.address = base;
}
/**
* Allocate an array of native socket addresses.
*/
static NativeSocketAddress[] allocate(int count) {
NativeSocketAddress[] array = new NativeSocketAddress[count];
for (int i = 0; i < count; i++) {
try {
array[i] = new NativeSocketAddress();
} catch (OutOfMemoryError e) {
freeAll(array);
throw e;
}
}
return array;
}
/**
* Free all non-null native socket addresses in the given array.
*/
static void freeAll(NativeSocketAddress[] array) {
for (int i = 0; i < array.length; i++) {
NativeSocketAddress sa = array[i];
if (sa != null) {
UNSAFE.freeMemory(sa.address);
}
}
}
/**
* Encodes the given InetSocketAddress into this socket address.
* @param protocolFamily protocol family
* @param isa the InetSocketAddress to encode
* @return the size of the socket address (sizeof sockaddr or sockaddr6)
* @throws UnsupportedAddressTypeException if the address type is not supported
*/
int encode(ProtocolFamily protocolFamily, InetSocketAddress isa) {
if (protocolFamily == StandardProtocolFamily.INET) {
// struct sockaddr
InetAddress ia = isa.getAddress();
if (!(ia instanceof Inet4Address))
throw new UnsupportedAddressTypeException();
putFamily(AF_INET);
putAddress(AF_INET, ia);
putPort(AF_INET, isa.getPort());
return SIZEOF_SOCKADDR4;
} else {
// struct sockaddr6
putFamily(AF_INET6);
putAddress(AF_INET6, isa.getAddress());
putPort(AF_INET6, isa.getPort());
UNSAFE.putInt(address + OFFSET_SIN6_FLOWINFO, 0);
return SIZEOF_SOCKADDR6;
}
}
/**
* Return an InetSocketAddress to represent the socket address in this buffer.
* @throws SocketException if the socket address is not AF_INET or AF_INET6
*/
InetSocketAddress decode() throws SocketException {
int family = family();
if (family != AF_INET && family != AF_INET6)
throw new SocketException("Socket family not recognized");
return new InetSocketAddress(address(family), port(family));
}
/**
* Find a mismatch between this and another socket address
* @return the byte offset of the first mismatch or -1 if no mismatch
*/
private int mismatch(NativeSocketAddress other) {
int i = ArraysSupport.vectorizedMismatch(null,
this.address,
null,
other.address,
SIZEOF_SOCKETADDRESS,
ArraysSupport.LOG2_ARRAY_BYTE_INDEX_SCALE);
if (i >= 0)
return i;
i = SIZEOF_SOCKETADDRESS - ~i;
for (; i < SIZEOF_SOCKETADDRESS; i++) {
if (UNSAFE.getByte(this.address + i) != UNSAFE.getByte(other.address + i)) {
return i;
}
}
return -1;
}
@Override
public boolean equals(Object other) {
if (other instanceof NativeSocketAddress) {
return mismatch((NativeSocketAddress) other) < 0;
} else {
return false;
}
}
@Override
public int hashCode() {
int h = 0;
for (int offset = 0; offset < SIZEOF_SOCKETADDRESS; offset++) {
h = 31 * h + UNSAFE.getByte(address + offset);
}
return h;
}
@Override
public String toString() {
int family = family();
if (family == AF_INET || family == AF_INET6) {
return ((family == AF_INET) ? "AF_INET" : "AF_INET6")
+ ", address=" + address(family) + ", port=" + port(family);
} else {
return "";
}
}
/**
* Return the value of the sa_family field.
*/
private int family() {
if (SIZEOF_FAMILY == 1) {
return UNSAFE.getByte(address + OFFSET_FAMILY);
} else if (SIZEOF_FAMILY == 2) {
return UNSAFE.getShort(address + OFFSET_FAMILY);
} else {
throw new InternalError();
}
}
/**
* Stores the given family in the sa_family field.
*/
private void putFamily(int family) {
if (SIZEOF_FAMILY == 1) {
UNSAFE.putByte(address + OFFSET_FAMILY, (byte) family);
} else if (SIZEOF_FAMILY == 2) {
UNSAFE.putShort(address + OFFSET_FAMILY, (short) family);
} else {
throw new InternalError();
}
}
/**
* Return the value of the sin_port or sin6_port field. These fields are
* stored in network order.
*/
private int port(int family) {
byte b1, b2;
if (family == AF_INET) {
b1 = UNSAFE.getByte(address + OFFSET_SIN4_PORT);
b2 = UNSAFE.getByte(address + OFFSET_SIN4_PORT + 1);
} else {
b1 = UNSAFE.getByte(address + OFFSET_SIN6_PORT);
b2 = UNSAFE.getByte(address + OFFSET_SIN6_PORT + 1);
}
return (Byte.toUnsignedInt(b1) << 8) + Byte.toUnsignedInt(b2);
}
/**
* Stores the given port number in the sin_port or sin6_port field. The
* port is stored in network order.
*/
private void putPort(int family, int port) {
byte b1 = (byte) ((port >> 8) & 0xff);
byte b2 = (byte) ((port >> 0) & 0xff);
if (family == AF_INET) {
UNSAFE.putByte(address + OFFSET_SIN4_PORT, b1);
UNSAFE.putByte(address + OFFSET_SIN4_PORT + 1, b2);
} else {
UNSAFE.putByte(address + OFFSET_SIN6_PORT, b1);
UNSAFE.putByte(address + OFFSET_SIN6_PORT + 1, b2);
}
}
/**
* Return an InetAddress to represent the value of the address in the
* sin4_addr or sin6_addr fields. For IPv6 addresses, the Inet6Address is
* created with the sin6_scope_id in the sockaddr_in6 structure.
*/
private InetAddress address(int family) {
int len;
int offset;
int scope_id;
if (family == AF_INET) {
len = 4;
offset = OFFSET_SIN4_ADDR;
scope_id = 0;
} else {
len = 16;
offset = OFFSET_SIN6_ADDR;
scope_id = UNSAFE.getInt(address + OFFSET_SIN6_SCOPE_ID);
}
byte[] bytes = new byte[len];
UNSAFE.copyMemory(null, address + offset, bytes, ARRAY_BASE_OFFSET, len);
try {
if (scope_id == 0) {
return InetAddress.getByAddress(bytes);
} else {
return Inet6Address.getByAddress(null, bytes, scope_id);
}
} catch (UnknownHostException e) {
throw new InternalError(e);
}
}
/**
* Stores the given InetAddress in the sin_addr or sin6_addr/sin6_scope_id
* fields. For IPv6 addresses, the sin6_addr will be popluated with an
* IPv4-mapped IPv6 address when the given InetAddress is an IPv4 address.
*/
private void putAddress(int family, InetAddress ia) {
if (family == AF_INET) {
// IPv4 address
putAddress(address + OFFSET_SIN4_ADDR, (Inet4Address) ia);
} else {
int scope_id;
if (ia instanceof Inet4Address) {
// IPv4-mapped IPv6 address
UNSAFE.setMemory(address + OFFSET_SIN6_ADDR, 10, (byte) 0);
UNSAFE.putByte(address + OFFSET_SIN6_ADDR + 10, (byte) 0xff);
UNSAFE.putByte(address + OFFSET_SIN6_ADDR + 11, (byte) 0xff);
putAddress(address + OFFSET_SIN6_ADDR + 12, (Inet4Address) ia);
scope_id = 0;
} else {
// IPv6 address
var inet6Address = (Inet6Address) ia;
putAddress(address + OFFSET_SIN6_ADDR, inet6Address);
scope_id = inet6Address.getScopeId();
}
UNSAFE.putInt(address + OFFSET_SIN6_SCOPE_ID, scope_id);
}
}
private static void putAddress(long address, Inet4Address ia) {
int ipAddress = JNINA.addressValue(ia);
// network order
UNSAFE.putByte(address + 0, (byte) ((ipAddress >>> 24) & 0xFF));
UNSAFE.putByte(address + 1, (byte) ((ipAddress >>> 16) & 0xFF));
UNSAFE.putByte(address + 2, (byte) ((ipAddress >>> 8) & 0xFF));
UNSAFE.putByte(address + 3, (byte) (ipAddress & 0xFF));
}
private static void putAddress(long address, Inet6Address ia) {
byte[] bytes = JNINA.addressBytes(ia);
UNSAFE.copyMemory(bytes, ARRAY_BASE_OFFSET, null, address, 16);
}
private static native int AFINET();
private static native int AFINET6();
private static native int sizeofSockAddr4();
private static native int sizeofSockAddr6();
private static native int sizeofFamily();
private static native int offsetFamily();
private static native int offsetSin4Port();
private static native int offsetSin4Addr();
private static native int offsetSin6Port();
private static native int offsetSin6Addr();
private static native int offsetSin6ScopeId();
private static native int offsetSin6FlowInfo();
static {
IOUtil.load();
}
}
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