diff options
author | Maros Marsalek <mmarsale@cisco.com> | 2016-11-10 13:31:25 +0100 |
---|---|---|
committer | Marek Gradzki <mgradzki@cisco.com> | 2016-11-19 21:29:39 +0100 |
commit | 175197da8ea43335df3daeba4c6296fcd83a057c (patch) | |
tree | 110298a990c6191933c2ad65d1a06333bab76cee /vpp-common/vpp-translate-utils/src/main/java/io/fd/hc2vpp/common/translate/util/Ipv4Translator.java | |
parent | 1813bf59fa53e8eb913d34b212d45b227dead799 (diff) |
Post split cleanup
- change groupIds
- change packages
- update poms
Change-Id: I343c5a292a67de1dd50687870ca4ab5b7276e93e
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>
Diffstat (limited to 'vpp-common/vpp-translate-utils/src/main/java/io/fd/hc2vpp/common/translate/util/Ipv4Translator.java')
-rw-r--r-- | vpp-common/vpp-translate-utils/src/main/java/io/fd/hc2vpp/common/translate/util/Ipv4Translator.java | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/vpp-common/vpp-translate-utils/src/main/java/io/fd/hc2vpp/common/translate/util/Ipv4Translator.java b/vpp-common/vpp-translate-utils/src/main/java/io/fd/hc2vpp/common/translate/util/Ipv4Translator.java new file mode 100644 index 000000000..255639655 --- /dev/null +++ b/vpp-common/vpp-translate-utils/src/main/java/io/fd/hc2vpp/common/translate/util/Ipv4Translator.java @@ -0,0 +1,137 @@ +/* + * 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.hc2vpp.common.translate.util; + +import static com.google.common.base.Preconditions.checkNotNull; + +import com.google.common.net.InetAddresses; +import java.net.UnknownHostException; +import java.util.Arrays; +import javax.annotation.Nonnull; +import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4AddressNoZone; +import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.inet.types.rev130715.Ipv4Prefix; + +/** + * Trait providing logic for translation of ipv4-related data. + */ +public interface Ipv4Translator extends ByteDataTranslator { + + /** + * Make available also from static context. + */ + Ipv4Translator INSTANCE = new Ipv4Translator() {}; + + /** + * Creates address array from address part of {@link Ipv4Prefix} + */ + default byte[] ipv4AddressPrefixToArray(@Nonnull final Ipv4Prefix ipv4Prefix) { + checkNotNull(ipv4Prefix, "Cannot convert null prefix"); + + byte[] retval = new byte[4]; + String[] address = ipv4Prefix.getValue().substring(0, ipv4Prefix.getValue().indexOf('/')).split("\\."); + + for (int d = 0; d < 4; d++) { + retval[d] = (byte) (Short.parseShort(address[d]) & 0xff); + } + return retval; + } + + /** + * Extracts {@link Ipv4Prefix} prefix + */ + default byte extractPrefix(Ipv4Prefix data) { + checkNotNull(data, "Cannot extract from null"); + + return Byte.valueOf(data.getValue().substring(data.getValue().indexOf('/') + 1)); + } + + /** + * Converts byte array to {@link Ipv4Prefix} with specified prefixLength + */ + default Ipv4Prefix arrayToIpv4Prefix(final byte[] address, byte prefixLength) { + Ipv4AddressNoZone addressPart = arrayToIpv4AddressNoZone(address); + + return new Ipv4Prefix(addressPart.getValue().concat("/").concat(String.valueOf(prefixLength))); + } + + /** + * 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 + default 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); + } + } + + /** + * 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 + default Ipv4AddressNoZone arrayToIpv4AddressNoZoneReversed(@Nonnull byte[] ip) { + // VPP sends ipv4 in a 16 byte array + + if (ip.length == 16) { + ip = Arrays.copyOfRange(ip, 0, 4); + } + + ip = reverseBytes(ip); + + 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); + } + } + + + /** + * 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 + */ + default byte[] ipv4AddressNoZoneToArray(final Ipv4AddressNoZone ipv4Addr) { + return ipv4AddressNoZoneToArray(ipv4Addr.getValue()); + } + + default byte[] ipv4AddressNoZoneToArray(final String ipv4Addr) { + byte[] retval = new byte[4]; + String[] dots = ipv4Addr.split("\\."); + + for (int d = 0; d < 4; d++) { + retval[d] = (byte) (Short.parseShort(dots[d]) & 0xff); + } + return retval; + } +} |