diff options
Diffstat (limited to 'framework/src/onos/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/MpUnReachNlri.java')
| -rw-r--r-- | framework/src/onos/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/MpUnReachNlri.java | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/framework/src/onos/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/MpUnReachNlri.java b/framework/src/onos/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/MpUnReachNlri.java new file mode 100644 index 00000000..3efed95c --- /dev/null +++ b/framework/src/onos/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/MpUnReachNlri.java @@ -0,0 +1,203 @@ +/* + * 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.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 { + + protected 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 LINK_NLRITYPE: + //TODO: to be merged later + 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 String toString() { + return MoreObjects.toStringHelper(getClass()) + .add("mpReachNlri", mpUnReachNlri) + .add("afi", afi) + .add("safi", safi) + .add("length", length) + .toString(); + } +}
\ No newline at end of file |