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Shashikanth VH
Committed by Gerrit Code Review
510a8d8f 1 parent c53a413e

[ONOS-3857] BGP flow spec NLRI encoding for MP_REACH and MP_UNREACH. 

Change-Id: I44237a12c4235fda2fcfafe60c3935159dae5231
Inline Side-by-side
Showing 2 changed files with 383 additions and 10 deletions
......@@ -19,11 +19,14 @@ package org.onosproject.bgpio.types;
import java.net.InetAddress;
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.onlab.packet.Ip4Address;
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.BgpPrefixIPv4LSNlriVer4;
import org.onosproject.bgpio.protocol.linkstate.BgpNodeLSNlriVer4;
import org.onosproject.bgpio.protocol.linkstate.BgpLinkLsNlriVer4;
......@@ -42,13 +45,15 @@ public class MpReachNlri implements BgpValueType {
private static final Logger log = LoggerFactory.getLogger(MpReachNlri.class);
public static final byte MPREACHNLRI_TYPE = 14;
public static final byte LINK_NLRITYPE = 2;
public static final byte FLAGS = (byte) 0x90;
public static final short FLOW_SPEC_LEN = 240;
private boolean isMpReachNlri = false;
private final List<BgpLSNlri> mpReachNlri;
private final int length;
private final short afi;
private final byte safi;
private final Ip4Address ipNextHop;
private BgpFlowSpecDetails bgpFlowSpecInfo;
/**
* Constructor to initialize parameters.
......@@ -68,6 +73,16 @@ public class MpReachNlri implements BgpValueType {
this.length = length;
}
public MpReachNlri(BgpFlowSpecDetails bgpFlowSpecInfo, short afi, byte safi) {
this.mpReachNlri = null;
this.isMpReachNlri = true;
this.length = 0;
this.ipNextHop = null;
this.bgpFlowSpecInfo = bgpFlowSpecInfo;
this.afi = afi;
this.safi = safi;
}
/**
* Returns whether MpReachNlri is present.
*
......@@ -96,6 +111,15 @@ public class MpReachNlri implements BgpValueType {
}
/**
* Returns BGP flow specification info.
*
* @return BGP flow specification info
*/
public BgpFlowSpecDetails bgpFlowSpecInfo() {
return this.bgpFlowSpecInfo;
}
/**
* Reads from ChannelBuffer and parses MpReachNlri.
*
* @param cb channelBuffer
......@@ -161,6 +185,79 @@ public class MpReachNlri implements BgpValueType {
}
mpReachNlri.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<>();
BgpValueType flowSpecComponent = null;
byte nextHopLen = tempCb.readByte();
if (nextHopLen > 0) {
InetAddress ipAddress = Validation.toInetAddress(nextHopLen, tempCb);
if (ipAddress.isMulticastAddress()) {
throw new BgpParseException("Multicast not supported");
}
ipNextHop = Ip4Address.valueOf(ipAddress);
}
byte reserved = tempCb.readByte();
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);
}
return new MpReachNlri(new BgpFlowSpecDetails(flowSpecComponents), afi, safi);
} else {
throw new BgpParseException("Not Supporting afi " + afi + "safi " + safi);
}
......@@ -202,14 +299,114 @@ public class MpReachNlri implements BgpValueType {
@Override
public int write(ChannelBuffer cb) {
//Not to be Implemented as of now
return 0;
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(MPREACHNLRI_TYPE);
int mpReachDataIndx = cb.writerIndex();
cb.writeShort(0);
cb.writeShort(afi);
cb.writeByte(safi);
//next hop address
cb.writeByte(0);
//sub network points of attachment
cb.writeByte(0);
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:
break;
}
}
/* RFC 5575: section 4, If the NLRI length value is smaller than 240 (0xf0 hex), the length
field can be encoded as a single octet. Otherwise, it is encoded as
an extended-length 2-octet values */
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() - mpReachDataIndx;
cb.setShort(mpReachDataIndx, (short) (fsNlriLen - 2));
}
return cb.writerIndex() - iLenStartIndex;
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
return MoreObjects.toStringHelper(getClass()).omitNullValues()
.add("mpReachNlri", mpReachNlri)
.add("bgpFlowSpecInfo", bgpFlowSpecInfo)
.add("afi", afi)
.add("safi", safi)
.add("ipNextHop", ipNextHop)
......
......@@ -18,10 +18,13 @@ 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;
......@@ -40,12 +43,14 @@ 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.
......@@ -64,6 +69,24 @@ public class MpUnReachNlri implements BgpValueType {
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.
*
......@@ -123,13 +146,76 @@ public class MpUnReachNlri implements BgpValueType {
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<>();
BgpValueType flowSpecComponent = null;
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);
}
return new MpUnReachNlri(new BgpFlowSpecDetails(flowSpecComponents), afi, safi);
} else {
//TODO: check with the values got from capability
throw new BgpParseException("Not Supporting afi " + afi
+ "safi " + safi);
throw new BgpParseException("Not Supporting afi " + afi + "safi " + safi);
}
}
return new MpUnReachNlri(mpUnReachNlri, afi, safi,
......@@ -188,8 +274,97 @@ public class MpUnReachNlri implements BgpValueType {
@Override
public int write(ChannelBuffer cb) {
//Not to be Implemented as of now
return 0;
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
......@@ -200,8 +375,9 @@ public class MpUnReachNlri implements BgpValueType {
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
return MoreObjects.toStringHelper(getClass()).omitNullValues()
.add("mpReachNlri", mpUnReachNlri)
.add("bgpFlowSpecInfo", bgpFlowSpecInfo)
.add("afi", afi)
.add("safi", safi)
.add("length", length)
......