*/
package org.opendaylight.protocol.bgp.parser.impl.message.open;
+import static java.util.Objects.requireNonNull;
+import static org.opendaylight.protocol.util.ByteBufWriteUtil.writeUnsignedShort;
+
+import com.google.common.base.Preconditions;
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
import java.util.ArrayList;
import java.util.List;
-
import org.opendaylight.protocol.bgp.parser.BGPDocumentedException;
import org.opendaylight.protocol.bgp.parser.BGPParsingException;
import org.opendaylight.protocol.bgp.parser.spi.AddressFamilyRegistry;
import org.opendaylight.protocol.bgp.parser.spi.CapabilitySerializer;
import org.opendaylight.protocol.bgp.parser.spi.CapabilityUtil;
import org.opendaylight.protocol.bgp.parser.spi.SubsequentAddressFamilyRegistry;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev130919.open.bgp.parameters.CParameters;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.open.bgp.parameters.c.parameters.GracefulRestartCase;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.open.bgp.parameters.c.parameters.GracefulRestartCaseBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.open.bgp.parameters.c.parameters.graceful.restart._case.GracefulRestartCapability;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.open.bgp.parameters.c.parameters.graceful.restart._case.GracefulRestartCapability.RestartFlags;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.open.bgp.parameters.c.parameters.graceful.restart._case.GracefulRestartCapabilityBuilder;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.open.bgp.parameters.c.parameters.graceful.restart._case.graceful.restart.capability.Tables;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.open.bgp.parameters.c.parameters.graceful.restart._case.graceful.restart.capability.Tables.AfiFlags;
-import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev130919.open.bgp.parameters.c.parameters.graceful.restart._case.graceful.restart.capability.TablesBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev171207.open.message.bgp.parameters.optional.capabilities.CParameters;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev171207.open.message.bgp.parameters.optional.capabilities.CParametersBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.CParameters1;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.CParameters1Builder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.mp.capabilities.GracefulRestartCapability;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.mp.capabilities.GracefulRestartCapability.RestartFlags;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.mp.capabilities.GracefulRestartCapabilityBuilder;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.mp.capabilities.graceful.restart.capability.Tables;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.mp.capabilities.graceful.restart.capability.Tables.AfiFlags;
+import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.multiprotocol.rev171207.mp.capabilities.graceful.restart.capability.TablesBuilder;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.AddressFamily;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.types.rev130919.SubsequentAddressFamily;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
-import com.google.common.base.Preconditions;
-import com.google.common.primitives.UnsignedBytes;
-
public final class GracefulCapabilityHandler implements CapabilityParser, CapabilitySerializer {
- public static final int CODE = 64;
-
- private static final Logger LOG = LoggerFactory.getLogger(GracefulCapabilityHandler.class);
-
- // Restart flag size, in bits
- private static final int RESTART_FLAGS_SIZE = 4;
- private static final int RESTART_FLAG_STATE = 0x80;
-
- // Restart timer size, in bits
- private static final int TIMER_SIZE = 12;
- private static final int TIMER_TOPBITS_MASK = 0x0F;
-
- // Size of the capability header
- private static final int HEADER_SIZE = (RESTART_FLAGS_SIZE + TIMER_SIZE) / Byte.SIZE;
-
- // Length of each AFI/SAFI array member, in bytes
- private static final int PER_AFI_SAFI_SIZE = 4;
-
- private static final int AFI_FLAG_FORWARDING_STATE = 0x80;
-
- private final AddressFamilyRegistry afiReg;
- private final SubsequentAddressFamilyRegistry safiReg;
-
- public GracefulCapabilityHandler(final AddressFamilyRegistry afiReg, final SubsequentAddressFamilyRegistry safiReg) {
- this.afiReg = Preconditions.checkNotNull(afiReg);
- this.safiReg = Preconditions.checkNotNull(safiReg);
- }
-
- @Override
- public byte[] serializeCapability(final CParameters capability) {
- final GracefulRestartCapability grace = ((GracefulRestartCase) capability).getGracefulRestartCapability();
- final List<Tables> tables = grace.getTables();
-
- final byte[] bytes = new byte[HEADER_SIZE + PER_AFI_SAFI_SIZE * tables.size()];
-
- int flagBits = 0;
- final RestartFlags flags = grace.getRestartFlags();
- if (flags != null) {
- if (flags.isRestartState()) {
- flagBits |= RESTART_FLAG_STATE;
- }
- }
- int timeval = 0;
- final Integer time = grace.getRestartTime();
- if (time != null) {
- Preconditions.checkArgument(time >= 0 && time <= 4095);
- timeval = time;
- }
- bytes[0] = UnsignedBytes.checkedCast(flagBits + timeval / 256);
- bytes[1] = UnsignedBytes.checkedCast(timeval % 256);
-
- int index = HEADER_SIZE;
- for (final Tables t : tables) {
- final Class<? extends AddressFamily> afi = t.getAfi();
- final Integer afival = this.afiReg.numberForClass(afi);
- Preconditions.checkArgument(afival != null, "Unhandled address family " + afi);
-
- final Class<? extends SubsequentAddressFamily> safi = t.getSafi();
- final Integer safival = this.safiReg.numberForClass(safi);
- Preconditions.checkArgument(safival != null, "Unhandled subsequent address family " + safi);
-
- bytes[index] = UnsignedBytes.checkedCast(afival / 256);
- bytes[index + 1] = UnsignedBytes.checkedCast(afival % 256);
- bytes[index + 2] = UnsignedBytes.checkedCast(safival);
- if (t.getAfiFlags().isForwardingState()) {
- bytes[index + 3] = UnsignedBytes.checkedCast(AFI_FLAG_FORWARDING_STATE);
- }
- index += PER_AFI_SAFI_SIZE;
- }
- return CapabilityUtil.formatCapability(CODE, bytes);
- }
-
- @Override
- public CParameters parseCapability(final byte[] bytes) throws BGPDocumentedException, BGPParsingException {
- final GracefulRestartCapabilityBuilder cb = new GracefulRestartCapabilityBuilder();
-
- final int flagBits = (bytes[0] >> RESTART_FLAGS_SIZE);
- cb.setRestartFlags(new RestartFlags((flagBits & 8) != 0));
-
- final int timer = ((bytes[0] & TIMER_TOPBITS_MASK) << RESTART_FLAGS_SIZE) + UnsignedBytes.toInt(bytes[1]);
- cb.setRestartTime(timer);
-
- final List<Tables> tables = new ArrayList<>();
- for (int offset = HEADER_SIZE; offset < bytes.length; offset += PER_AFI_SAFI_SIZE) {
- final int afiVal = UnsignedBytes.toInt(bytes[offset]) * 256 + UnsignedBytes.toInt(bytes[offset + 1]);
- final Class<? extends AddressFamily> afi = this.afiReg.classForFamily(afiVal);
- if (afi == null) {
- LOG.debug("Ignoring GR capability for unknown address family {}", afiVal);
- continue;
- }
- final int safiVal = UnsignedBytes.toInt(bytes[offset + 2]);
- final Class<? extends SubsequentAddressFamily> safi = this.safiReg.classForFamily(safiVal);
- if (safi == null) {
- LOG.debug("Ignoring GR capability for unknown subsequent address family {}", safiVal);
- continue;
- }
- final int flags = UnsignedBytes.toInt(bytes[offset + 3]);
- tables.add(new TablesBuilder().setAfi(afi).setSafi(safi).setAfiFlags(new AfiFlags((flags & AFI_FLAG_FORWARDING_STATE) != 0)).build());
- }
- return new GracefulRestartCaseBuilder().setGracefulRestartCapability(cb.build()).build();
- }
+ public static final int CODE = 64;
+
+ private static final Logger LOG = LoggerFactory.getLogger(GracefulCapabilityHandler.class);
+
+ // Restart flag size, in bits
+ private static final int RESTART_FLAGS_SIZE = 4;
+ private static final int RESTART_FLAG_STATE = 0x8000;
+
+ // Restart timer size, in bits
+ private static final int TIMER_SIZE = 12;
+ private static final int TIMER_TOPBITS_MASK = 0x0F;
+
+ // Size of the capability header
+ private static final int HEADER_SIZE = (RESTART_FLAGS_SIZE + TIMER_SIZE) / Byte.SIZE;
+
+ // Length of each AFI/SAFI array member, in bytes
+ private static final int PER_AFI_SAFI_SIZE = 4;
+
+ private static final short AFI_FLAG_FORWARDING_STATE = 0x80;
+
+ private static final int MAX_RESTART_TIME = 4095;
+
+ private final AddressFamilyRegistry afiReg;
+ private final SubsequentAddressFamilyRegistry safiReg;
+
+ public GracefulCapabilityHandler(final AddressFamilyRegistry afiReg, final SubsequentAddressFamilyRegistry safiReg) {
+ this.afiReg = requireNonNull(afiReg);
+ this.safiReg = requireNonNull(safiReg);
+ }
+
+ private void serializeTables(final List<Tables> tables, final ByteBuf bytes) {
+ if (tables == null) {
+ return;
+ }
+ for (final Tables t : tables) {
+ final Class<? extends AddressFamily> afi = t.getAfi();
+ final Integer afival = this.afiReg.numberForClass(afi);
+ Preconditions.checkArgument(afival != null, "Unhandled address family " + afi);
+ bytes.writeShort(afival);
+ final Class<? extends SubsequentAddressFamily> safi = t.getSafi();
+ final Integer safival = this.safiReg.numberForClass(safi);
+ Preconditions.checkArgument(safival != null, "Unhandled subsequent address family " + safi);
+ bytes.writeByte(safival);
+ if (t.getAfiFlags() != null && t.getAfiFlags().isForwardingState()) {
+ bytes.writeByte(AFI_FLAG_FORWARDING_STATE);
+ } else {
+ bytes.writeZero(1);
+ }
+ }
+ }
+
+ private ByteBuf serializeCapability(final GracefulRestartCapability grace) {
+ final List<Tables> tables = grace.getTables();
+ final int tablesSize = (tables != null) ? tables.size() : 0;
+ final ByteBuf bytes = Unpooled.buffer(HEADER_SIZE + (PER_AFI_SAFI_SIZE * tablesSize));
+ int timeval = 0;
+ Integer time = grace.getRestartTime();
+ if (time == null) {
+ time = 0;
+ }
+ Preconditions.checkArgument(time >= 0 && time <= MAX_RESTART_TIME, "Restart time is " + time);
+ timeval = time;
+ final GracefulRestartCapability.RestartFlags flags = grace.getRestartFlags();
+ if (flags != null && flags.isRestartState()) {
+ writeUnsignedShort(RESTART_FLAG_STATE | timeval, bytes);
+ } else {
+ writeUnsignedShort(timeval, bytes);
+ }
+ serializeTables(tables, bytes);
+ return bytes;
+ }
+
+ @Override
+ public void serializeCapability(final CParameters capability, final ByteBuf byteAggregator) {
+ if (capability.getAugmentation(CParameters1.class) == null
+ || capability.getAugmentation(CParameters1.class).getGracefulRestartCapability() == null) {
+ return;
+ }
+ final GracefulRestartCapability grace = capability.getAugmentation(CParameters1.class).getGracefulRestartCapability();
+
+ final ByteBuf bytes = serializeCapability(grace);
+
+ CapabilityUtil.formatCapability(CODE, bytes, byteAggregator);
+ }
+
+ @Override
+ public CParameters parseCapability(final ByteBuf buffer) throws BGPDocumentedException, BGPParsingException {
+ final GracefulRestartCapabilityBuilder cb = new GracefulRestartCapabilityBuilder();
+
+ final int flagBits = (buffer.getByte(0) >> RESTART_FLAGS_SIZE);
+ cb.setRestartFlags(new RestartFlags((flagBits & Byte.SIZE) != 0));
+
+ final int timer = ((buffer.readUnsignedByte() & TIMER_TOPBITS_MASK) << Byte.SIZE) + buffer.readUnsignedByte();
+ cb.setRestartTime(timer);
+
+ final List<Tables> tables = new ArrayList<>();
+ while (buffer.readableBytes() != 0) {
+ final int afiVal = buffer.readShort();
+ final Class<? extends AddressFamily> afi = this.afiReg.classForFamily(afiVal);
+ if (afi == null) {
+ LOG.debug("Ignoring GR capability for unknown address family {}", afiVal);
+ buffer.skipBytes(PER_AFI_SAFI_SIZE - 2);
+ continue;
+ }
+ final int safiVal = buffer.readUnsignedByte();
+ final Class<? extends SubsequentAddressFamily> safi = this.safiReg.classForFamily(safiVal);
+ if (safi == null) {
+ LOG.debug("Ignoring GR capability for unknown subsequent address family {}", safiVal);
+ buffer.skipBytes(1);
+ continue;
+ }
+ final int flags = buffer.readUnsignedByte();
+ tables.add(new TablesBuilder().setAfi(afi).setSafi(safi).setAfiFlags(new AfiFlags((flags & AFI_FLAG_FORWARDING_STATE) != 0)).build());
+ }
+ cb.setTables(tables);
+ return new CParametersBuilder().addAugmentation(CParameters1.class, new CParameters1Builder()
+ .setGracefulRestartCapability(cb.build()).build()).build();
+ }
}
Code Review / bgpcep.git / blobdiff