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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.interfacesstate;
import java.math.BigInteger;
import javax.annotation.Nonnull;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Gauge64;
import com.google.common.base.Preconditions;
import org.openvpp.vppjapi.vppApi;
import org.openvpp.vppjapi.vppInterfaceDetails;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class InterfaceUtils {
private static final Logger LOG = LoggerFactory.getLogger(InterfaceUtils.class);
private static final Gauge64 vppLinkSpeed0 = new Gauge64(BigInteger.ZERO);
private static final Gauge64 vppLinkSpeed1 = new Gauge64(BigInteger.valueOf(10 * 1000000));
private static final Gauge64 vppLinkSpeed2 = new Gauge64(BigInteger.valueOf(100 * 1000000));
private static final Gauge64 vppLinkSpeed4 = new Gauge64(BigInteger.valueOf(1000 * 1000000));
private static final Gauge64 vppLinkSpeed8 = new Gauge64(BigInteger.valueOf(10000L * 1000000));
private static final Gauge64 vppLinkSpeed16 = new Gauge64(BigInteger.valueOf(40000L * 1000000));
private static final Gauge64 vppLinkSpeed32 = new Gauge64(BigInteger.valueOf(100000L * 1000000));
private static final char[] HEX_CHARS = "0123456789abcdef".toCharArray();
/**
* Convert VPP's link speed bitmask to Yang type. 1 = 10M, 2 = 100M, 4 = 1G,
* 8 = 10G, 16 = 40G, 32 = 100G
*
* @param vppLinkSpeed Link speed in bitmask format from VPP.
* @return Converted value from VPP link speed
*/
public static Gauge64 vppInterfaceSpeedToYang(byte vppLinkSpeed) {
switch (vppLinkSpeed) {
case 1:
return vppLinkSpeed1;
case 2:
return vppLinkSpeed2;
case 4:
return vppLinkSpeed4;
case 8:
return vppLinkSpeed8;
case 16:
return vppLinkSpeed16;
case 32:
return vppLinkSpeed32;
default:
return vppLinkSpeed0;
}
}
private static final void appendHexByte(final StringBuilder sb, final byte b) {
final int v = b & 0xFF;
sb.append(HEX_CHARS[v >>> 4]);
sb.append(HEX_CHARS[v & 15]);
}
/**
* Convert VPP's physical address stored byte array format to string as Yang
* dictates
* <p>
* Replace later with
* https://git.opendaylight.org/gerrit/#/c/34869/10/model/ietf/ietf-type-
* util/src/main/
* java/org/opendaylight/mdsal/model/ietf/util/AbstractIetfYangUtil.java
*
* @param vppPhysAddress byte array of bytes constructing the network IF physical
* address.
* @return String like "aa:bb:cc:dd:ee:ff"
*/
public static String vppPhysAddrToYang(@Nonnull final byte[] vppPhysAddress) {
Preconditions.checkNotNull(vppPhysAddress, "Empty physicall address bytes");
Preconditions.checkArgument(vppPhysAddress.length == 6, "Invalid physical address size %s, expected 6",
vppPhysAddress.length);
StringBuilder physAddr = new StringBuilder();
appendHexByte(physAddr, vppPhysAddress[0]);
for (int i = 1; i < vppPhysAddress.length; i++) {
physAddr.append(":");
appendHexByte(physAddr, vppPhysAddress[i]);
}
return physAddr.toString();
}
/**
* VPP's interface index is counted from 0, whereas ietf-interface's
* if-index is from 1. This function converts from VPP's interface index to YANG's interface index.
*
* @param vppIfIndex the sw interface index VPP reported.
* @return VPP's interface index incremented by one
*/
public static int vppIfIndexToYang(int vppIfIndex) {
return vppIfIndex + 1;
}
/**
* This function does the opposite of what {@link #vppIfIndexToYang(int)} does.
*
* @param yangIf if-index from ietf-interfaces.
* @return VPP's representation of the if-index
*/
public static int YangIfIndexToVpp(int yangIfIndex) {
Preconditions.checkArgument(yangIfIndex >= 1, "YANG if-index has invalid value %s", yangIfIndex);
return yangIfIndex - 1;
}
public static vppInterfaceDetails[] getVppInterfaceDetails(final vppApi api,
final boolean specificInterface,
String interfaceName) {
if (interfaceName == null) {
interfaceName = new String();
}
vppInterfaceDetails[] ifaces = api.swInterfaceDump(
(byte) (specificInterface ? 1 : 0),
interfaceName.getBytes());
if (null == ifaces) {
LOG.warn("VPP returned null instead of interface by key {}", interfaceName);
return null;
}
if (1 != ifaces.length) {
LOG.error("Failed to extract interface {} details from VPP", interfaceName);
}
return ifaces;
}
}
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