use of org.onosproject.bgpio.protocol.BgpEvpnNlri in project onos by opennetworkinglab.
the class MpReachNlri method read.
/**
* Reads from ChannelBuffer and parses MpReachNlri.
*
* @param cb channelBuffer
* @return object of MpReachNlri
* @throws BgpParseException while parsing MpReachNlri
*/
public static MpReachNlri 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 (cb.readableBytes() < parseFlags.getLength()) {
Validation.validateLen(BgpErrorType.UPDATE_MESSAGE_ERROR, BgpErrorType.ATTRIBUTE_LENGTH_ERROR, parseFlags.getLength());
}
if (!parseFlags.getFirstBit() && parseFlags.getSecondBit() && parseFlags.getThirdBit()) {
throw new BgpParseException(BgpErrorType.UPDATE_MESSAGE_ERROR, BgpErrorType.ATTRIBUTE_FLAGS_ERROR, data);
}
BgpLSNlri bgpLSNlri = null;
List<BgpLSNlri> mpReachNlri = new LinkedList<>();
ChannelBuffer tempCb = cb.readBytes(parseFlags.getLength());
short afi = 0;
byte safi = 0;
IpAddress ipNextHop = null;
while (tempCb.readableBytes() > 0) {
afi = tempCb.readShort();
safi = tempCb.readByte();
// Supporting for AFI 16388 / SAFI 71 and VPN AFI 16388 / SAFI 128
if ((afi == Constants.AFI_VALUE) && (safi == Constants.SAFI_VALUE) || (afi == Constants.AFI_VALUE) && (safi == Constants.VPN_SAFI_VALUE)) {
byte nextHopLen = tempCb.readByte();
InetAddress ipAddress = Validation.toInetAddress(nextHopLen, tempCb);
if (ipAddress.isMulticastAddress()) {
throw new BgpParseException("Multicast not supported");
}
ipNextHop = IpAddress.valueOf(ipAddress);
byte reserved = tempCb.readByte();
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:
case BgpPrefixIPv4LSNlriVer4.PREFIX_IPV6_NLRITYPE:
// RFC 7752 : Structure of IPv4 and IPv6 is same
bgpLSNlri = BgpPrefixIPv4LSNlriVer4.read(tempBuf, afi, safi);
break;
default:
log.debug("nlriType not supported" + nlriType);
}
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<>();
RouteDistinguisher routeDistinguisher = null;
if (tempCb.readableBytes() > 0) {
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 = IpAddress.valueOf(ipAddress);
}
byte reserved = tempCb.readByte();
if (safi == Constants.VPN_SAFI_FLOWSPEC_VALUE) {
routeDistinguisher = new RouteDistinguisher();
routeDistinguisher = RouteDistinguisher.read(tempCb);
}
while (tempCb.readableBytes() > 0) {
short totNlriLen = tempCb.getUnsignedByte(tempCb.readerIndex());
if (totNlriLen >= BgpFlowSpecNlri.FLOW_SPEC_LEN) {
if (tempCb.readableBytes() < 2) {
Validation.validateLen(BgpErrorType.UPDATE_MESSAGE_ERROR, BgpErrorType.ATTRIBUTE_LENGTH_ERROR, totNlriLen);
}
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 = BgpFsIcmpCode.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);
}
}
}
BgpFlowSpecNlri flowSpecDetails = new BgpFlowSpecNlri(flowSpecComponents);
flowSpecDetails.setRouteDistinguiher(routeDistinguisher);
return new MpReachNlri(flowSpecDetails, afi, safi);
} else if ((afi == Constants.AFI_EVPN_VALUE) && (safi == Constants.SAFI_EVPN_VALUE)) {
List<BgpEvpnNlri> eVpnComponents = null;
byte nextHopLen = tempCb.readByte();
InetAddress ipAddress = Validation.toInetAddress(nextHopLen, tempCb);
if (ipAddress.isMulticastAddress()) {
throw new BgpParseException("Multicast not supported");
}
ipNextHop = IpAddress.valueOf(ipAddress);
byte reserved = tempCb.readByte();
while (tempCb.readableBytes() > 0) {
BgpEvpnNlri eVpnComponent = BgpEvpnNlriImpl.read(tempCb);
eVpnComponents = new LinkedList<>();
eVpnComponents.add(eVpnComponent);
log.info("=====evpn Component is {} ======", eVpnComponent);
}
return new MpReachNlri(eVpnComponents, afi, safi, ipNextHop);
} else if ((afi == Constants.AFI_IPV4_UNICAST && safi == Constants.SAFI_UNICAST) || (afi == Constants.AFI_IPV6_UNICAST && safi == Constants.SAFI_UNICAST)) {
byte nextHopLen = tempCb.readByte();
InetAddress ipAddress = Validation.toInetAddress(nextHopLen, tempCb);
if (ipAddress.isMulticastAddress()) {
throw new BgpParseException("Multicast not supported");
}
ipNextHop = IpAddress.valueOf(ipAddress);
byte snpa = tempCb.readByte();
// TODO : Use this info, if required
if (tempCb.readableBytes() > 0) {
// Convert bits to bytes
int mpReachNlriPrefixLength = tempCb.readByte() / ONE_BYTE_LENGTH;
tempCb.skipBytes(mpReachNlriPrefixLength);
}
return new MpReachNlri(mpReachNlri, afi, safi, ipNextHop, parseFlags.getLength());
} else {
throw new BgpParseException("Not Supporting afi " + afi + "safi " + safi);
}
}
return new MpReachNlri(mpReachNlri, afi, safi, ipNextHop, parseFlags.getLength());
}
use of org.onosproject.bgpio.protocol.BgpEvpnNlri in project onos by opennetworkinglab.
the class MpUnReachNlri method read.
/**
* 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:
case BgpPrefixIPv4LSNlriVer4.PREFIX_IPV6_NLRITYPE:
// RFC 7752 : Structure of IPv4 and IPv6 is same
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);
}
while (tempCb.readableBytes() > 0) {
short totNlriLen = tempCb.getUnsignedByte(tempCb.readerIndex());
if (totNlriLen >= BgpFlowSpecNlri.FLOW_SPEC_LEN) {
if (tempCb.readableBytes() < 2) {
Validation.validateLen(BgpErrorType.UPDATE_MESSAGE_ERROR, BgpErrorType.ATTRIBUTE_LENGTH_ERROR, totNlriLen);
}
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 = BgpFsIcmpCode.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);
}
}
}
BgpFlowSpecNlri flowSpecDetails = new BgpFlowSpecNlri(flowSpecComponents);
flowSpecDetails.setRouteDistinguiher(routeDistinguisher);
return new MpUnReachNlri(flowSpecDetails, afi, safi);
} else if ((afi == Constants.AFI_EVPN_VALUE) && (safi == Constants.SAFI_EVPN_VALUE)) {
List<BgpEvpnNlri> eVpnComponents = null;
while (tempCb.readableBytes() > 0) {
BgpEvpnNlri eVpnComponent = BgpEvpnNlriImpl.read(tempCb);
eVpnComponents = new LinkedList<>();
eVpnComponents.add(eVpnComponent);
log.info("=====evpn Component is {} ======", eVpnComponent);
}
return new MpUnReachNlri(eVpnComponents, afi, safi);
} else if ((afi == Constants.AFI_IPV4_UNICAST && safi == Constants.SAFI_UNICAST) || (afi == Constants.AFI_IPV6_UNICAST && safi == Constants.SAFI_UNICAST)) {
// Right now, we do not know where to use these bytes so we skip them
// If we do not skip, there are errors in reading subsequent TLVs
// TODO : Use this info, if required
// Short for AFI, byte for SAFI
int remainingLen = parseFlags.getLength() - 3;
if (remainingLen > 0) {
tempCb.skipBytes(remainingLen);
}
} 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());
}
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