| /* |
| * Copyright 2015 Open Networking Laboratory |
| * |
| * 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.onosproject.bgpio.types; |
| |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.ListIterator; |
| |
| import org.jboss.netty.buffer.ChannelBuffer; |
| import org.jboss.netty.buffer.ChannelBuffers; |
| import org.onosproject.bgpio.exceptions.BgpParseException; |
| import org.onosproject.bgpio.protocol.BgpLSNlri; |
| import org.onosproject.bgpio.protocol.flowspec.BgpFlowSpecDetails; |
| import org.onosproject.bgpio.protocol.linkstate.BgpNodeLSNlriVer4; |
| import org.onosproject.bgpio.protocol.linkstate.BgpPrefixIPv4LSNlriVer4; |
| import org.onosproject.bgpio.protocol.linkstate.BgpLinkLsNlriVer4; |
| import org.onosproject.bgpio.util.Constants; |
| import org.onosproject.bgpio.util.Validation; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import com.google.common.base.MoreObjects; |
| |
| /** |
| * Provides Implementation of MpUnReach Nlri BGP Path Attribute. |
| */ |
| public class MpUnReachNlri implements BgpValueType { |
| |
| private static final Logger log = LoggerFactory.getLogger(MpUnReachNlri.class); |
| public static final byte MPUNREACHNLRI_TYPE = 15; |
| public static final byte LINK_NLRITYPE = 2; |
| public static final byte FLAGS = (byte) 0x90; |
| public static final short FLOW_SPEC_LEN = 240; |
| private boolean isMpUnReachNlri = false; |
| private final short afi; |
| private final byte safi; |
| private final List<BgpLSNlri> mpUnReachNlri; |
| private final int length; |
| private BgpFlowSpecDetails bgpFlowSpecInfo; |
| |
| /** |
| * Constructor to initialize parameters. |
| * |
| * @param mpUnReachNlri MpUnReach Nlri attribute |
| * @param afi address family identifier |
| * @param safi subsequent address family identifier |
| * @param length of MpUnReachNlri |
| */ |
| public MpUnReachNlri(List<BgpLSNlri> mpUnReachNlri, short afi, byte safi, |
| int length) { |
| this.mpUnReachNlri = mpUnReachNlri; |
| this.isMpUnReachNlri = true; |
| this.afi = afi; |
| this.safi = safi; |
| this.length = length; |
| } |
| |
| public MpUnReachNlri(BgpFlowSpecDetails bgpFlowSpecInfo, short afi, byte safi) { |
| this.mpUnReachNlri = null; |
| this.isMpUnReachNlri = true; |
| this.length = 0; |
| this.bgpFlowSpecInfo = bgpFlowSpecInfo; |
| this.afi = afi; |
| this.safi = safi; |
| } |
| |
| /** |
| * Returns BGP flow specification info. |
| * |
| * @return BGP flow specification info |
| */ |
| public BgpFlowSpecDetails bgpFlowSpecInfo() { |
| return this.bgpFlowSpecInfo; |
| } |
| |
| /** |
| * Reads from ChannelBuffer and parses MpUnReachNlri. |
| * |
| * @param cb ChannelBuffer |
| * @return object of MpUnReachNlri |
| * @throws BgpParseException while parsing MpUnReachNlri |
| */ |
| public static MpUnReachNlri read(ChannelBuffer cb) throws BgpParseException { |
| ChannelBuffer tempBuf = cb.copy(); |
| Validation parseFlags = Validation.parseAttributeHeader(cb); |
| int len = parseFlags.isShort() ? parseFlags.getLength() + Constants.TYPE_AND_LEN_AS_SHORT |
| : parseFlags.getLength() + Constants.TYPE_AND_LEN_AS_BYTE; |
| ChannelBuffer data = tempBuf.readBytes(len); |
| |
| if (!parseFlags.getFirstBit() && parseFlags.getSecondBit() |
| && parseFlags.getThirdBit()) { |
| throw new BgpParseException(BgpErrorType.UPDATE_MESSAGE_ERROR, |
| BgpErrorType.ATTRIBUTE_FLAGS_ERROR, data); |
| } |
| |
| if (cb.readableBytes() < parseFlags.getLength()) { |
| Validation.validateLen(BgpErrorType.UPDATE_MESSAGE_ERROR, |
| BgpErrorType.ATTRIBUTE_LENGTH_ERROR, parseFlags.getLength()); |
| } |
| |
| LinkedList<BgpLSNlri> mpUnReachNlri = new LinkedList<>(); |
| BgpLSNlri bgpLSNlri = null; |
| short afi = 0; |
| byte safi = 0; |
| ChannelBuffer tempCb = cb.readBytes(parseFlags.getLength()); |
| while (tempCb.readableBytes() > 0) { |
| afi = tempCb.readShort(); |
| safi = tempCb.readByte(); |
| |
| //Supporting only for AFI 16388 / SAFI 71 |
| if ((afi == Constants.AFI_VALUE) && (safi == Constants.SAFI_VALUE) |
| || (afi == Constants.AFI_VALUE) && (safi == Constants.VPN_SAFI_VALUE)) { |
| while (tempCb.readableBytes() > 0) { |
| short nlriType = tempCb.readShort(); |
| short totNlriLen = tempCb.readShort(); |
| if (tempCb.readableBytes() < totNlriLen) { |
| Validation.validateLen( |
| BgpErrorType.UPDATE_MESSAGE_ERROR, |
| BgpErrorType.ATTRIBUTE_LENGTH_ERROR, totNlriLen); |
| } |
| tempBuf = tempCb.readBytes(totNlriLen); |
| switch (nlriType) { |
| case BgpNodeLSNlriVer4.NODE_NLRITYPE: |
| bgpLSNlri = BgpNodeLSNlriVer4.read(tempBuf, afi, safi); |
| break; |
| case BgpLinkLsNlriVer4.LINK_NLRITYPE: |
| bgpLSNlri = BgpLinkLsNlriVer4.read(tempBuf, afi, safi); |
| break; |
| case BgpPrefixIPv4LSNlriVer4.PREFIX_IPV4_NLRITYPE: |
| bgpLSNlri = BgpPrefixIPv4LSNlriVer4.read(tempBuf, afi, |
| safi); |
| break; |
| default: |
| log.debug("nlriType not supported" + nlriType); |
| break; |
| } |
| mpUnReachNlri.add(bgpLSNlri); |
| } |
| } else if ((afi == Constants.AFI_FLOWSPEC_VALUE) |
| && ((safi == Constants.SAFI_FLOWSPEC_VALUE) |
| || (safi == Constants.VPN_SAFI_FLOWSPEC_VALUE))) { |
| List<BgpValueType> flowSpecComponents = new LinkedList<>(); |
| RouteDistinguisher routeDistinguisher = null; |
| if (tempCb.readableBytes() > 0) { |
| BgpValueType flowSpecComponent = null; |
| |
| if (safi == Constants.VPN_SAFI_FLOWSPEC_VALUE) { |
| routeDistinguisher = new RouteDistinguisher(); |
| routeDistinguisher = RouteDistinguisher.read(tempCb); |
| } |
| short totNlriLen = tempCb.getByte(tempCb.readerIndex()); |
| if (totNlriLen >= FLOW_SPEC_LEN) { |
| totNlriLen = tempCb.readShort(); |
| } else { |
| totNlriLen = tempCb.readByte(); |
| } |
| if (tempCb.readableBytes() < totNlriLen) { |
| Validation.validateLen(BgpErrorType.UPDATE_MESSAGE_ERROR, |
| BgpErrorType.ATTRIBUTE_LENGTH_ERROR, totNlriLen); |
| } |
| tempBuf = tempCb.readBytes(totNlriLen); |
| while (tempBuf.readableBytes() > 0) { |
| short type = tempBuf.readByte(); |
| switch (type) { |
| case Constants.BGP_FLOWSPEC_DST_PREFIX: |
| flowSpecComponent = BgpFsDestinationPrefix.read(tempBuf); |
| break; |
| case Constants.BGP_FLOWSPEC_SRC_PREFIX: |
| flowSpecComponent = BgpFsSourcePrefix.read(tempBuf); |
| break; |
| case Constants.BGP_FLOWSPEC_IP_PROTO: |
| flowSpecComponent = BgpFsIpProtocol.read(tempBuf); |
| break; |
| case Constants.BGP_FLOWSPEC_PORT: |
| flowSpecComponent = BgpFsPortNum.read(tempBuf); |
| break; |
| case Constants.BGP_FLOWSPEC_DST_PORT: |
| flowSpecComponent = BgpFsDestinationPortNum.read(tempBuf); |
| break; |
| case Constants.BGP_FLOWSPEC_SRC_PORT: |
| flowSpecComponent = BgpFsSourcePortNum.read(tempBuf); |
| break; |
| case Constants.BGP_FLOWSPEC_ICMP_TP: |
| flowSpecComponent = BgpFsIcmpType.read(tempBuf); |
| break; |
| case Constants.BGP_FLOWSPEC_ICMP_CD: |
| flowSpecComponent = BgpFsIcmpType.read(tempBuf); |
| break; |
| case Constants.BGP_FLOWSPEC_TCP_FLAGS: |
| flowSpecComponent = BgpFsTcpFlags.read(tempBuf); |
| break; |
| case Constants.BGP_FLOWSPEC_PCK_LEN: |
| flowSpecComponent = BgpFsPacketLength.read(tempBuf); |
| break; |
| case Constants.BGP_FLOWSPEC_DSCP: |
| flowSpecComponent = BgpFsDscpValue.read(tempBuf); |
| break; |
| case Constants.BGP_FLOWSPEC_FRAGMENT: |
| flowSpecComponent = BgpFsFragment.read(tempBuf); |
| break; |
| default: |
| log.debug("flow spec type not supported" + type); |
| break; |
| } |
| flowSpecComponents.add(flowSpecComponent); |
| } |
| } |
| BgpFlowSpecDetails flowSpecDetails = new BgpFlowSpecDetails(flowSpecComponents); |
| flowSpecDetails.setRouteDistinguiher(routeDistinguisher); |
| return new MpUnReachNlri(flowSpecDetails, afi, safi); |
| } else { |
| //TODO: check with the values got from capability |
| throw new BgpParseException("Not Supporting afi " + afi + "safi " + safi); |
| } |
| } |
| return new MpUnReachNlri(mpUnReachNlri, afi, safi, |
| parseFlags.getLength()); |
| } |
| |
| @Override |
| public short getType() { |
| return MPUNREACHNLRI_TYPE; |
| } |
| |
| /** |
| * Returns SAFI. |
| * |
| * @return SAFI |
| */ |
| public byte safi() { |
| return this.safi; |
| } |
| |
| /** |
| * Returns AFI. |
| * |
| * @return AFI |
| */ |
| public short afi() { |
| return this.afi; |
| } |
| |
| /** |
| * Returns list of MpUnReach Nlri. |
| * |
| * @return list of MpUnReach Nlri |
| */ |
| public List<BgpLSNlri> mpUnReachNlri() { |
| return this.mpUnReachNlri; |
| } |
| |
| /** |
| * Returns whether MpReachNlri is present. |
| * |
| * @return whether MpReachNlri is present |
| */ |
| public boolean isMpUnReachNlriSet() { |
| return this.isMpUnReachNlri; |
| } |
| |
| /** |
| * Returns length of MpUnReach. |
| * |
| * @return length of MpUnReach |
| */ |
| public int mpUnReachNlriLen() { |
| return this.length; |
| } |
| |
| @Override |
| public int write(ChannelBuffer cb) { |
| int iLenStartIndex = cb.writerIndex(); |
| if ((afi == Constants.AFI_FLOWSPEC_VALUE) && ((safi == Constants.SAFI_FLOWSPEC_VALUE) || |
| (safi == Constants.VPN_SAFI_FLOWSPEC_VALUE))) { |
| |
| cb.writeByte(FLAGS); |
| cb.writeByte(MPUNREACHNLRI_TYPE); |
| |
| int mpUnReachIndx = cb.writerIndex(); |
| cb.writeShort(0); |
| |
| cb.writeShort(afi); |
| cb.writeByte(safi); |
| |
| if (bgpFlowSpecInfo.routeDistinguisher() != null) { |
| cb.writeLong(bgpFlowSpecInfo.routeDistinguisher().getRouteDistinguisher()); |
| } |
| |
| ChannelBuffer flowSpecTmpBuff = ChannelBuffers.dynamicBuffer(); |
| int tmpBuffStartIndx = flowSpecTmpBuff.writerIndex(); |
| |
| List<BgpValueType> flowSpec = bgpFlowSpecInfo.flowSpecComponents(); |
| ListIterator<BgpValueType> listIterator = flowSpec.listIterator(); |
| while (listIterator.hasNext()) { |
| BgpValueType tlv = listIterator.next(); |
| switch (tlv.getType()) { |
| case Constants.BGP_FLOWSPEC_DST_PREFIX: |
| BgpFsDestinationPrefix fsDstPrefix = (BgpFsDestinationPrefix) tlv; |
| fsDstPrefix.write(flowSpecTmpBuff); |
| break; |
| case Constants.BGP_FLOWSPEC_SRC_PREFIX: |
| BgpFsSourcePrefix fsSrcPrefix = (BgpFsSourcePrefix) tlv; |
| fsSrcPrefix.write(flowSpecTmpBuff); |
| break; |
| case Constants.BGP_FLOWSPEC_IP_PROTO: |
| BgpFsIpProtocol fsIpProtocol = (BgpFsIpProtocol) tlv; |
| fsIpProtocol.write(flowSpecTmpBuff); |
| break; |
| case Constants.BGP_FLOWSPEC_PORT: |
| BgpFsPortNum fsPortNum = (BgpFsPortNum) tlv; |
| fsPortNum.write(flowSpecTmpBuff); |
| break; |
| case Constants.BGP_FLOWSPEC_DST_PORT: |
| BgpFsDestinationPortNum fsDstPortNum = (BgpFsDestinationPortNum) tlv; |
| fsDstPortNum.write(flowSpecTmpBuff); |
| break; |
| case Constants.BGP_FLOWSPEC_SRC_PORT: |
| BgpFsSourcePortNum fsSrcPortNum = (BgpFsSourcePortNum) tlv; |
| fsSrcPortNum.write(flowSpecTmpBuff); |
| break; |
| case Constants.BGP_FLOWSPEC_ICMP_TP: |
| BgpFsIcmpType fsIcmpType = (BgpFsIcmpType) tlv; |
| fsIcmpType.write(flowSpecTmpBuff); |
| break; |
| case Constants.BGP_FLOWSPEC_ICMP_CD: |
| BgpFsIcmpCode fsIcmpCode = (BgpFsIcmpCode) tlv; |
| fsIcmpCode.write(flowSpecTmpBuff); |
| break; |
| case Constants.BGP_FLOWSPEC_TCP_FLAGS: |
| BgpFsTcpFlags fsTcpFlags = (BgpFsTcpFlags) tlv; |
| fsTcpFlags.write(flowSpecTmpBuff); |
| break; |
| case Constants.BGP_FLOWSPEC_PCK_LEN: |
| BgpFsPacketLength fsPacketLen = (BgpFsPacketLength) tlv; |
| fsPacketLen.write(flowSpecTmpBuff); |
| break; |
| case Constants.BGP_FLOWSPEC_DSCP: |
| BgpFsDscpValue fsDscpVal = (BgpFsDscpValue) tlv; |
| fsDscpVal.write(flowSpecTmpBuff); |
| break; |
| case Constants.BGP_FLOWSPEC_FRAGMENT: |
| BgpFsFragment fsFragment = (BgpFsFragment) tlv; |
| fsFragment.write(flowSpecTmpBuff); |
| break; |
| default: |
| } |
| } |
| |
| int len = flowSpecTmpBuff.writerIndex() - tmpBuffStartIndx; |
| if (len >= FLOW_SPEC_LEN) { |
| cb.writeShort(len); |
| } else { |
| cb.writeByte(len); |
| } |
| //Copy from bynamic buffer to channel buffer |
| cb.writeBytes(flowSpecTmpBuff); |
| |
| int fsNlriLen = cb.writerIndex() - mpUnReachIndx; |
| cb.setShort(mpUnReachIndx, (short) (fsNlriLen - 2)); |
| } |
| |
| return cb.writerIndex() - iLenStartIndex; |
| } |
| |
| @Override |
| public int compareTo(Object o) { |
| // TODO Auto-generated method stub |
| return 0; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()).omitNullValues() |
| .add("mpReachNlri", mpUnReachNlri) |
| .add("bgpFlowSpecInfo", bgpFlowSpecInfo) |
| .add("afi", afi) |
| .add("safi", safi) |
| .add("length", length) |
| .toString(); |
| } |
| } |