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org.opendaylight.lispflowmapping.lisp.util.MaskUtil Maven / Gradle / Ivy
/*
* Copyright (c) 2014, 2017 Contextream, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.lispflowmapping.lisp.util;
import com.google.common.base.Preconditions;
import com.google.common.net.InetAddresses;
import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.nio.ByteBuffer;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IetfInetUtil;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.IpPrefix;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.SimpleAddress;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.Address;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.InstanceId;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.Ipv4;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.Ipv4Prefix;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.Ipv6;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.Ipv6Prefix;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.ServicePath;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.SourceDestKey;
import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.lisp.address.types.rev151105.lisp.address.address.source.dest.key.SourceDestKeyBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.binary.address.types.rev160504.augmented.lisp.address.address.Ipv4Binary;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.binary.address.types.rev160504.augmented.lisp.address.address.Ipv4PrefixBinary;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.binary.address.types.rev160504.augmented.lisp.address.address.Ipv6Binary;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.binary.address.types.rev160504.augmented.lisp.address.address.Ipv6PrefixBinary;
import org.opendaylight.yang.gen.v1.urn.opendaylight.lfm.lisp.proto.rev151105.eid.container.Eid;
import org.opendaylight.yangtools.yang.common.Uint8;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public final class MaskUtil {
private static final Logger LOG = LoggerFactory.getLogger(MaskUtil.class);
public static final short IPV4_MAX_MASK = 32;
public static final Uint8 IPV4_MAX_MASK_UINT = Uint8.valueOf(IPV4_MAX_MASK);
public static final short IPV6_MAX_MASK = 128;
public static final Uint8 IPV6_MAX_MASK_UINT = Uint8.valueOf(IPV6_MAX_MASK);
// Utility class, should not be instantiated
private MaskUtil() {
}
public static boolean isMaskable(Address address) {
if (address instanceof Ipv4Prefix || address instanceof Ipv6Prefix
|| address instanceof Ipv4PrefixBinary || address instanceof Ipv6PrefixBinary
|| address instanceof SourceDestKey) {
return true;
} else if (address instanceof InstanceId) {
return isMaskable(((InstanceId)address).getInstanceId().getAddress());
}
return false;
}
public static boolean isMaskable(SimpleAddress address) {
if (address.getIpPrefix() != null) {
return true;
}
return false;
}
private static int slashPosition(final String prefix) {
final int slash = prefix.lastIndexOf('/');
Preconditions.checkArgument(slash >= 0, "Argument %s does not contain a slash", prefix);
return slash;
}
public static String getPrefixAddress(final String prefix) {
return prefix.substring(0, slashPosition(prefix));
}
public static String getPrefixMask(final String prefix) {
return prefix.substring(slashPosition(prefix) + 1);
}
private static String[] splitPrefix(final String prefix) {
final int slash = slashPosition(prefix);
return new String[] { prefix.substring(0, slash), prefix.substring(slash + 1) };
}
public static Eid normalize(Eid eid, short mask) {
Address address = eid.getAddress();
try {
if (address instanceof Ipv4PrefixBinary) {
byte[] addr = ((Ipv4PrefixBinary) address).getIpv4AddressBinary().getValue();
return LispAddressUtil.asIpv4PrefixBinaryEid(eid, normalizeByteArray(addr, mask), mask);
} else if (address instanceof Ipv6PrefixBinary) {
byte[] addr = ((Ipv6PrefixBinary) address).getIpv6AddressBinary().getValue();
return LispAddressUtil.asIpv6PrefixBinaryEid(eid, normalizeByteArray(addr, mask), mask);
} else if (address instanceof Ipv4Prefix) {
final String addr = getPrefixAddress(((Ipv4Prefix)address).getIpv4Prefix().getValue());
InetAddress normalized = normalizeIP(InetAddresses.forString(addr), mask);
return LispAddressUtil.asIpv4PrefixEid(eid, (Inet4Address)normalized, mask);
} else if (address instanceof Ipv6Prefix) {
final String addr = getPrefixAddress(((Ipv6Prefix)address).getIpv6Prefix().getValue());
InetAddress normalized = normalizeIP(InetAddresses.forString(addr), mask);
return LispAddressUtil.asIpv6PrefixEid(eid, (Inet6Address)normalized, mask);
} else if (address instanceof InstanceId) {
// TODO - not absolutely necessary, but should be implemented
return eid;
}
} catch (UnknownHostException e) {
LOG.warn("Failed to normalize EID {} with mask {}, returning original EID", eid, mask, e);
}
return eid;
}
public static Eid normalize(Eid eid) {
Address address = eid.getAddress();
try {
if (address instanceof Ipv4PrefixBinary) {
byte[] addr = ((Ipv4PrefixBinary) address).getIpv4AddressBinary().getValue();
short mask = ((Ipv4PrefixBinary) address).getIpv4MaskLength().toJava();
return LispAddressUtil.asIpv4PrefixBinaryEid(eid, normalizeByteArray(addr, mask), mask);
} else if (address instanceof Ipv6PrefixBinary) {
byte[] addr = ((Ipv6PrefixBinary) address).getIpv6AddressBinary().getValue();
short mask = ((Ipv6PrefixBinary) address).getIpv6MaskLength().toJava();
return LispAddressUtil.asIpv6PrefixBinaryEid(eid, normalizeByteArray(addr, mask), mask);
} else if (address instanceof Ipv4Prefix) {
String[] v4prefix = splitPrefix(((Ipv4Prefix)address).getIpv4Prefix().getValue());
short mask = Short.parseShort(v4prefix[1]);
InetAddress normalized = normalizeIP(InetAddresses.forString(v4prefix[0]), mask);
return LispAddressUtil.asIpv4PrefixEid(eid, (Inet4Address) normalized, mask);
} else if (address instanceof Ipv6Prefix) {
String[] v6prefix = splitPrefix(((Ipv6Prefix)address).getIpv6Prefix().getValue());
short mask = Short.parseShort(v6prefix[1]);
InetAddress normalized = normalizeIP(InetAddresses.forString(v6prefix[0]), mask);
return LispAddressUtil.asIpv6PrefixEid(eid, (Inet6Address) normalized, mask);
} else if (address instanceof Ipv4) {
return LispAddressUtil.asIpv4PrefixEid(((Ipv4) address).getIpv4(), eid.getVirtualNetworkId());
} else if (address instanceof Ipv6) {
return LispAddressUtil.asIpv6PrefixEid(((Ipv6) address).getIpv6(), eid.getVirtualNetworkId());
} else if (address instanceof InstanceId) {
// TODO - not absolutely necessary, but should be implemented
return eid;
} else if (address instanceof SourceDestKey) {
return normalizeSrcDst(eid);
} else if (address instanceof ServicePath) {
// Build new Service Path eid with service index set to 0
long spi = ((ServicePath) address).getServicePath().getServicePathId().getValue().toJava();
long vni = eid.getVirtualNetworkId() != null ? eid.getVirtualNetworkId().getValue().toJava() : -1;
return LispAddressUtil.asServicePathEid(vni, spi, (short)0);
}
} catch (UnknownHostException e) {
LOG.warn("Failed to normalize EID {}, returning original", eid, e);
}
return eid;
}
private static Eid normalizeSrcDst(Eid eid) throws UnknownHostException {
final SimpleAddress normalizedSrc = normalizeSimpleAddress(
((SourceDestKey) eid.getAddress()).getSourceDestKey().getSource());
final SimpleAddress normalizedDst = normalizeSimpleAddress(
((SourceDestKey) eid.getAddress()).getSourceDestKey().getDest());
return LispAddressUtil.asSrcDstEid(new SourceDestKeyBuilder()
.setSource(normalizedSrc).setDest(normalizedDst).build(), eid.getVirtualNetworkId());
}
private static SimpleAddress normalizeSimpleAddress(SimpleAddress address) throws UnknownHostException {
if (address.getIpPrefix() == null) {
return address;
}
return new SimpleAddress(normalizeIpPrefix(address.getIpPrefix()));
}
private static IpPrefix normalizeIpPrefix(IpPrefix address) throws UnknownHostException {
String[] prefix = splitPrefix(address.stringValue());
short mask = Short.parseShort(prefix[1]);
InetAddress normalizedAddress = normalizeIP(InetAddresses.forString(prefix[0]), mask);
return IetfInetUtil.ipPrefixFor(normalizedAddress.getAddress(), mask);
}
private static InetAddress normalizeIP(InetAddress address, int maskLength) throws UnknownHostException {
return InetAddress.getByAddress(normalizeByteArray(address.getAddress(), (short) maskLength));
}
public static byte[] normalizeByteArray(byte[] address, short maskLength) {
ByteBuffer byteRepresentation = ByteBuffer.wrap(address);
byte byteMask = (byte) 0xff;
int mask = maskLength;
for (int i = 0; i < byteRepresentation.array().length; i++) {
if (mask >= 8) {
byteRepresentation.put(i, (byte) (byteMask & byteRepresentation.get(i)));
} else if (mask > 0) {
byteRepresentation.put(i, (byte) ((byte) (byteMask << 8 - mask) & byteRepresentation.get(i)));
} else {
byteRepresentation.put(i, (byte) (0 & byteRepresentation.get(i)));
}
mask -= 8;
}
return byteRepresentation.array();
}
public static int getMaxMask(Address address) {
if (address instanceof Ipv4 || address instanceof Ipv4Prefix || address instanceof Ipv4Binary
|| address instanceof Ipv4PrefixBinary) {
return IPV4_MAX_MASK;
} else if (address instanceof Ipv6 || address instanceof Ipv6Prefix || address instanceof Ipv4Binary
|| address instanceof Ipv6PrefixBinary) {
return IPV6_MAX_MASK;
} else {
return -1;
}
}
private static String getIpPrefixString(IpPrefix prefix) {
if (prefix.getIpv4Prefix() != null) {
return prefix.getIpv4Prefix().getValue();
} else if (prefix.getIpv6Prefix() != null) {
return prefix.getIpv6Prefix().getValue();
} else {
throw new IllegalArgumentException("Invalid prefix " + prefix);
}
}
public static short getMaskForIpPrefix(IpPrefix prefix) {
return Short.parseShort(getPrefixMask(getIpPrefixString(prefix)));
}
public static String getAddressStringForIpPrefix(IpPrefix prefix) {
return getPrefixAddress(getIpPrefixString(prefix));
}
public static String getAddressStringForIpv4Prefix(Ipv4Prefix prefix) {
return getPrefixAddress(prefix.getIpv4Prefix().getValue());
}
public static String getAddressStringForIpv6Prefix(Ipv6Prefix prefix) {
return getPrefixAddress(prefix.getIpv6Prefix().getValue());
}
public static short getMaskForAddress(SimpleAddress address) {
if (address.getIpPrefix() == null) {
return -1;
}
return getMaskForIpPrefix(address.getIpPrefix());
}
public static short getMaskForAddress(Address address) {
if (address instanceof Ipv4) {
return IPV4_MAX_MASK;
} else if (address instanceof Ipv6) {
return IPV6_MAX_MASK;
} else if (address instanceof Ipv4Binary) {
return IPV4_MAX_MASK;
} else if (address instanceof Ipv6Binary) {
return IPV6_MAX_MASK;
} else if (address instanceof Ipv4Prefix) {
return Short.parseShort(getPrefixMask(((Ipv4Prefix) address).getIpv4Prefix().getValue()));
} else if (address instanceof Ipv6Prefix) {
return Short.parseShort(getPrefixMask(((Ipv6Prefix) address).getIpv6Prefix().getValue()));
} else if (address instanceof InstanceId) {
return getMaskForAddress(((InstanceId)address).getInstanceId().getAddress());
} else if (address instanceof Ipv4PrefixBinary) {
return ((Ipv4PrefixBinary) address).getIpv4MaskLength().toJava();
} else if (address instanceof Ipv6PrefixBinary) {
return ((Ipv6PrefixBinary) address).getIpv6MaskLength().toJava();
}
return -1;
}
}
