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/*
* Copyright (c) 2016 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 io.fd.honeycomb.v3po.translate.v3po.util;
import static com.google.common.base.Preconditions.checkArgument;
import com.google.common.base.Splitter;
import com.google.common.net.InetAddresses;
import java.net.UnknownHostException;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.function.BiConsumer;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4AddressNoZone;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.openvpp.jvpp.VppBaseCallException;
import org.openvpp.jvpp.dto.JVppReply;
public final class TranslateUtils {
public static final Splitter COLON_SPLITTER = Splitter.on(':');
public static final int DEFAULT_TIMEOUT_IN_SECONDS = 5;
private TranslateUtils() {
}
public static <REP extends JVppReply<?>> REP getReplyForWrite(@Nonnull Future<REP> future,
@Nonnull final InstanceIdentifier<?> replyType)
throws VppBaseCallException, WriteTimeoutException {
return getReplyForWrite(future, replyType, DEFAULT_TIMEOUT_IN_SECONDS);
}
public static <REP extends JVppReply<?>> REP getReplyForWrite(@Nonnull Future<REP> future,
@Nonnull final InstanceIdentifier<?> replyType,
@Nonnegative final int timeoutInSeconds)
throws VppBaseCallException, WriteTimeoutException {
try {
return getReply(future, timeoutInSeconds);
} catch (TimeoutException e) {
throw new WriteTimeoutException(replyType, e);
}
}
public static <REP extends JVppReply<?>> REP getReplyForRead(@Nonnull Future<REP> future,
@Nonnull final InstanceIdentifier<?> replyType)
throws VppBaseCallException, ReadTimeoutException {
return getReplyForRead(future, replyType, DEFAULT_TIMEOUT_IN_SECONDS);
}
public static <REP extends JVppReply<?>> REP getReplyForRead(@Nonnull Future<REP> future,
@Nonnull final InstanceIdentifier<?> replyType,
@Nonnegative final int timeoutInSeconds)
throws VppBaseCallException, ReadTimeoutException {
try {
return getReply(future, timeoutInSeconds);
} catch (TimeoutException e) {
throw new ReadTimeoutException(replyType, e);
}
}
public static <REP extends JVppReply<?>> REP getReply(@Nonnull Future<REP> future)
throws TimeoutException, VppBaseCallException {
return getReply(future, DEFAULT_TIMEOUT_IN_SECONDS);
}
public static <REP extends JVppReply<?>> REP getReply(@Nonnull Future<REP> future,
@Nonnegative final int timeoutInSeconds)
throws TimeoutException, VppBaseCallException {
try {
checkArgument(timeoutInSeconds > 0, "Timeout cannot be < 0");
return future.get(timeoutInSeconds, TimeUnit.SECONDS);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
throw new IllegalStateException("Interrupted", e);
} catch (ExecutionException e) {
// Execution exception could generally contains any exception
// when using exceptions instead of return codes just rethrow it for processing on corresponding place
if (e instanceof ExecutionException && (e.getCause() instanceof VppBaseCallException)) {
throw (VppBaseCallException) (e.getCause());
}
throw new IllegalStateException(e);
}
}
/**
* Transform Ipv4 address to a byte array acceptable by VPP. VPP expects incoming byte array to be in the same order
* as the address.
*
* @return byte array with address bytes
*/
public static byte[] ipv4AddressNoZoneToArray(final Ipv4AddressNoZone ipv4Addr) {
byte[] retval = new byte[4];
String[] dots = ipv4Addr.getValue().split("\\.");
for (int d = 0; d < 4; d++) {
retval[d] = (byte) (Short.parseShort(dots[d]) & 0xff);
}
return retval;
}
/**
* Parse byte array returned by VPP representing an Ipv4 address. Vpp returns IP byte arrays in reversed order.
*
* @return Ipv4AddressNoZone containing string representation of IPv4 address constructed from submitted bytes. No
* change in order.
*/
@Nonnull
public static Ipv4AddressNoZone arrayToIpv4AddressNoZone(@Nonnull byte[] ip) {
// VPP sends ipv4 in a 16 byte array
if (ip.length == 16) {
ip = Arrays.copyOfRange(ip, 0, 4);
}
try {
// Not reversing the byte array here!! because the IP coming from VPP is in reversed byte order
// compared to byte order it was submitted
return new Ipv4AddressNoZone(InetAddresses.toAddrString(InetAddresses.fromLittleEndianByteArray(ip)));
} catch (UnknownHostException e) {
throw new IllegalArgumentException("Unable to parse ipv4", e);
}
}
/**
* Return (interned) string from byte array while removing \u0000. Strings represented as fixed length byte[] from
* vpp contain \u0000.
*/
public static String toString(final byte[] cString) {
return new String(cString).replaceAll("\\u0000", "").intern();
}
/**
* Parse string represented mac address (using ":" as separator) into a byte array
*/
@Nonnull
public static byte[] parseMac(@Nonnull final String macAddress) {
final List<String> parts = COLON_SPLITTER.splitToList(macAddress);
checkArgument(parts.size() == 6, "Mac address is expected to have 6 parts but was: %s", macAddress);
return parseMacLikeString(parts);
}
private static byte[] parseMacLikeString(final List<String> strings) {
return strings.stream().limit(6).map(TranslateUtils::parseHexByte).collect(
() -> new byte[strings.size()],
new BiConsumer<byte[], Byte>() {
private int i = -1;
@Override
public void accept(final byte[] bytes, final Byte aByte) {
bytes[++i] = aByte;
}
},
(bytes, bytes2) -> {
throw new UnsupportedOperationException("Parallel collect not supported");
});
}
public static byte parseHexByte(final String aByte) {
return (byte) Integer.parseInt(aByte, 16);
}
/**
* Returns 0 if argument is null or false, 1 otherwise.
*
* @param value Boolean value to be converted
* @return byte value equal to 0 or 1
*/
public static byte booleanToByte(@Nullable final Boolean value) {
return value != null && value
? (byte) 1
: (byte) 0;
}
/**
* Returns Boolean.TRUE if argument is 0, Boolean.FALSE otherwise.
*
* @param value byte value to be converted
* @return Boolean value
* @throws IllegalArgumentException if argument is neither 0 nor 1
*/
@Nonnull
public static Boolean byteToBoolean(final byte value) {
if (value == 0) {
return Boolean.FALSE;
} else if (value == 1) {
return Boolean.TRUE;
}
throw new IllegalArgumentException(String.format("0 or 1 was expected but was %d", value));
}
/**
* Reverses bytes in the byte array
*
* @param bytes input array
* @return reversed array
*/
public static byte[] reverseBytes(final byte[] bytes) {
final byte[] reversed = new byte[bytes.length];
int i = 1;
for (byte aByte : bytes) {
reversed[bytes.length - i++] = aByte;
}
return reversed;
}
}
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