| /* |
| * 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 org.jboss.netty.buffer.ChannelBuffer; |
| import org.onosproject.bgpio.exceptions.BgpParseException; |
| import org.onosproject.bgpio.protocol.BgpLSNlri; |
| 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; |
| |
| private boolean isMpUnReachNlri = false; |
| private final short afi; |
| private final byte safi; |
| private final List<BgpLSNlri> mpUnReachNlri; |
| private final int length; |
| |
| /** |
| * 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; |
| } |
| |
| /** |
| * 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); |
| } |
| mpUnReachNlri.add(bgpLSNlri); |
| } |
| } 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) { |
| //Not to be Implemented as of now |
| return 0; |
| } |
| |
| @Override |
| public int compareTo(Object o) { |
| // TODO Auto-generated method stub |
| return 0; |
| } |
| |
| @Override |
| public String toString() { |
| return MoreObjects.toStringHelper(getClass()) |
| .add("mpReachNlri", mpUnReachNlri) |
| .add("afi", afi) |
| .add("safi", safi) |
| .add("length", length) |
| .toString(); |
| } |
| } |