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/*
* Copyright (c) 2015 Cisco and/or its affiliates.
* Licensed 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 org.openvpp.vppjapi;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
import java.nio.file.attribute.PosixFilePermission;
import java.nio.file.attribute.PosixFilePermissions;
import java.util.Set;
import java.util.concurrent.atomic.AtomicBoolean;
import org.openvpp.vppjapi.vppVersion;
import org.openvpp.vppjapi.vppInterfaceDetails;
import org.openvpp.vppjapi.vppInterfaceCounters;
import org.openvpp.vppjapi.vppBridgeDomainDetails;
import org.openvpp.vppjapi.vppIPv4Address;
import org.openvpp.vppjapi.vppIPv6Address;
import org.openvpp.vppjapi.vppVxlanTunnelDetails;
public class vppConn implements AutoCloseable {
private static final String LIBNAME = "libvppjni.so.0.0.0";
static {
try {
loadLibrary();
} catch (IOException | RuntimeException e) {
System.out.printf ("Can't find vpp jni library: %s\n", LIBNAME);
throw new ExceptionInInitializerError(e);
}
}
private static void loadStream(final InputStream is) throws IOException {
final Set<PosixFilePermission> perms = PosixFilePermissions.fromString("rwxr-x---");
final Path p = Files.createTempFile(LIBNAME, null, PosixFilePermissions.asFileAttribute(perms));
try {
Files.copy(is, p, StandardCopyOption.REPLACE_EXISTING);
try {
Runtime.getRuntime().load(p.toString());
} catch (UnsatisfiedLinkError e) {
throw new IOException(String.format("Failed to load library %s", p), e);
}
} finally {
try {
Files.deleteIfExists(p);
} catch (IOException e) {
}
}
}
private static void loadLibrary() throws IOException {
try (final InputStream is = vppConn.class.getResourceAsStream('/' + LIBNAME)) {
if (is == null) {
throw new IOException(String.format("Failed to open library resource %s",
LIBNAME));
}
loadStream(is);
}
}
private static vppConn currentConnection = null;
private final AtomicBoolean disconnected = new AtomicBoolean(false);
private final String clientName;
// Hidden on purpose to prevent external instantiation
vppConn(final String clientName) throws IOException {
this.clientName = clientName;
synchronized (vppConn.class) {
if (currentConnection != null) {
throw new IOException("Already connected as " + currentConnection.clientName);
}
final int ret = clientConnect(clientName);
if (ret != 0) {
throw new IOException("Connection returned error " + ret);
}
currentConnection = this;
}
}
@Override
public final void close() {
if (disconnected.compareAndSet(false, true)) {
synchronized (vppConn.class) {
clientDisconnect();
currentConnection = null;
}
}
}
/**
* Check if this instance is connected.
*
* @throws IllegalStateException if this instance was disconnected.
*/
protected final void checkConnected() {
if (disconnected.get()) {
throw new IllegalStateException("Disconnected client " + clientName);
}
}
public final int getRetval(int context, int release) {
checkConnected();
return getRetval0(context, release);
}
public final String getInterfaceList (String nameFilter) {
checkConnected();
return getInterfaceList0(nameFilter);
}
public final int swIfIndexFromName (String interfaceName) {
checkConnected();
return swIfIndexFromName0(interfaceName);
}
public final String interfaceNameFromSwIfIndex (int swIfIndex) {
checkConnected();
return interfaceNameFromSwIfIndex0(swIfIndex);
}
public final void clearInterfaceTable () {
checkConnected();
clearInterfaceTable0();
}
public final vppInterfaceDetails[] swInterfaceDump (byte nameFilterValid, byte [] nameFilter) {
checkConnected();
return swInterfaceDump0(nameFilterValid, nameFilter);
}
public final int bridgeDomainIdFromName(String bridgeDomain) {
checkConnected();
return bridgeDomainIdFromName0(bridgeDomain);
}
public final int findOrAddBridgeDomainId(String bridgeDomain) {
checkConnected();
return findOrAddBridgeDomainId0(bridgeDomain);
}
public final vppVersion getVppVersion() {
checkConnected();
return getVppVersion0();
}
public final vppInterfaceCounters getInterfaceCounters(int swIfIndex) {
checkConnected();
return getInterfaceCounters0(swIfIndex);
}
public final int[] bridgeDomainDump(int bdId) {
checkConnected();
return bridgeDomainDump0(bdId);
}
public final vppBridgeDomainDetails getBridgeDomainDetails(int bdId) {
checkConnected();
return getBridgeDomainDetails0(bdId);
}
public final vppL2Fib[] l2FibTableDump(int bdId) {
checkConnected();
return l2FibTableDump0(bdId);
}
public final int bridgeDomainIdFromInterfaceName(String interfaceName) {
checkConnected();
return bridgeDomainIdFromInterfaceName0(interfaceName);
}
public final vppIPv4Address[] ipv4AddressDump(String interfaceName) {
checkConnected();
return ipv4AddressDump0(interfaceName);
}
public final vppIPv6Address[] ipv6AddressDump(String interfaceName) {
checkConnected();
return ipv6AddressDump0(interfaceName);
}
public final vppVxlanTunnelDetails[] vxlanTunnelDump(int swIfIndex) {
checkConnected();
return vxlanTunnelDump0(swIfIndex);
}
public final int setInterfaceDescription(String ifName, String ifDesc) {
checkConnected();
return setInterfaceDescription0(ifName, ifDesc);
}
public final String getInterfaceDescription(String ifName) {
checkConnected();
return getInterfaceDescription0(ifName);
}
private static native int clientConnect(String clientName);
private static native void clientDisconnect();
private static native int getRetval0(int context, int release);
private static native String getInterfaceList0(String nameFilter);
private static native int swIfIndexFromName0(String interfaceName);
private static native String interfaceNameFromSwIfIndex0(int swIfIndex);
private static native void clearInterfaceTable0();
private static native vppInterfaceDetails[] swInterfaceDump0(byte nameFilterValid, byte [] nameFilter);
private static native int bridgeDomainIdFromName0(String bridgeDomain);
private static native int findOrAddBridgeDomainId0(String bridgeDomain);
private static native vppVersion getVppVersion0();
private static native vppInterfaceCounters getInterfaceCounters0(int swIfIndex);
private static native int[] bridgeDomainDump0(int bdId);
private static native vppBridgeDomainDetails getBridgeDomainDetails0(int bdId);
private static native vppL2Fib[] l2FibTableDump0(int bdId);
private static native int bridgeDomainIdFromInterfaceName0(String interfaceName);
private static native vppIPv4Address[] ipv4AddressDump0(String interfaceName);
private static native vppIPv6Address[] ipv6AddressDump0(String interfaceName);
private static native vppVxlanTunnelDetails[] vxlanTunnelDump0(int swIfIndex);
private static native int setInterfaceDescription0(String ifName, String ifDesc);
private static native String getInterfaceDescription0(String ifName);
}
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