diff options
Diffstat (limited to 'framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepOpenMsgVer1.java')
| -rw-r--r-- | framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepOpenMsgVer1.java | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepOpenMsgVer1.java b/framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepOpenMsgVer1.java new file mode 100644 index 00000000..902226e9 --- /dev/null +++ b/framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepOpenMsgVer1.java @@ -0,0 +1,204 @@ +/* + * 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.pcepio.protocol.ver1; + +import org.jboss.netty.buffer.ChannelBuffer; +import org.onosproject.pcepio.exceptions.PcepParseException; +import org.onosproject.pcepio.protocol.PcepMessageReader; +import org.onosproject.pcepio.protocol.PcepMessageWriter; +import org.onosproject.pcepio.protocol.PcepOpenMsg; +import org.onosproject.pcepio.protocol.PcepOpenObject; +import org.onosproject.pcepio.protocol.PcepType; +import org.onosproject.pcepio.protocol.PcepVersion; +import org.onosproject.pcepio.types.PcepErrorDetailInfo; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.google.common.base.MoreObjects; + +/** + * Provides PCEP open message. + */ +public class PcepOpenMsgVer1 implements PcepOpenMsg { + + /* + * <Open Message>::= <Common Header> <OPEN> + 0 1 2 3 + 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | Ver | Flags | Message-Type | Message-Length | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | Object-Class | OT |Res|P|I| Object Length (bytes) | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | Ver | Flags | Keepalive | DeadTimer | SID | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + | | + // Optional TLVs // + | | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + */ + + protected static final Logger log = LoggerFactory.getLogger(PcepOpenMsgVer1.class); + + public static final byte PACKET_VERSION = 1; + public static final int PACKET_MINIMUM_LENGTH = 12; + public static final PcepType MSG_TYPE = PcepType.OPEN; + private PcepOpenObject pcepOpenObj; + + public static final PcepOpenMsgVer1.Reader READER = new Reader(); + + /** + * Constructor to initialize PcepOpenObject. + * + * @param pcepOpenObj PCEP-OPEN-OBJECT + */ + public PcepOpenMsgVer1(PcepOpenObject pcepOpenObj) { + this.pcepOpenObj = pcepOpenObj; + } + + @Override + public PcepOpenObject getPcepOpenObject() { + return this.pcepOpenObj; + } + + @Override + public void setPcepOpenObject(PcepOpenObject pcepOpenObj) { + this.pcepOpenObj = pcepOpenObj; + } + + @Override + public PcepVersion getVersion() { + return PcepVersion.PCEP_1; + } + + @Override + public PcepType getType() { + return MSG_TYPE; + } + + /** + * Reader class for reading PCEP open message from channel buffer. + */ + public static class Reader implements PcepMessageReader<PcepOpenMsg> { + + @Override + public PcepOpenMsg readFrom(ChannelBuffer cb) throws PcepParseException { + + if (cb.readableBytes() < PACKET_MINIMUM_LENGTH) { + throw new PcepParseException("Packet size is less than the minimum length."); + } + + byte version = cb.readByte(); + version = (byte) (version >> PcepMessageVer1.SHIFT_FLAG); + if (version != PACKET_VERSION) { + log.error("[readFrom] Invalid version: " + version); + throw new PcepParseException(PcepErrorDetailInfo.ERROR_TYPE_1, PcepErrorDetailInfo.ERROR_VALUE_1); + } + // fixed value property type == 1 + byte type = cb.readByte(); + + if (type != MSG_TYPE.getType()) { + log.error("[readFrom] Unexpected type: " + type); + throw new PcepParseException(PcepErrorDetailInfo.ERROR_TYPE_1, PcepErrorDetailInfo.ERROR_VALUE_1); + } + int length = cb.readShort(); + if (length < PACKET_MINIMUM_LENGTH) { + throw new PcepParseException( + "Wrong length: Expected to be >= " + PACKET_MINIMUM_LENGTH + ", was: " + length); + } + return new PcepOpenMsgVer1(PcepOpenObjectVer1.read(cb)); + } + } + + /** + * Builder class for PCEP open message. + */ + static class Builder implements PcepOpenMsg.Builder { + + private PcepOpenObject pcepOpenObj; + + @Override + public PcepOpenMsg build() throws PcepParseException { + if (!(pcepOpenObj instanceof PcepOpenObjectVer1)) { + throw new NullPointerException("PcepOpenObject is null."); + } + return new PcepOpenMsgVer1(pcepOpenObj); + } + + @Override + public PcepVersion getVersion() { + return PcepVersion.PCEP_1; + } + + @Override + public PcepType getType() { + return PcepType.OPEN; + } + + @Override + public PcepOpenObject getPcepOpenObj() { + return this.pcepOpenObj; + } + + @Override + public Builder setPcepOpenObj(PcepOpenObject obj) { + this.pcepOpenObj = obj; + return this; + } + } + + @Override + public void writeTo(ChannelBuffer cb) throws PcepParseException { + WRITER.write(cb, this); + } + + public static final Writer WRITER = new Writer(); + + /** + * Writer class for writing PCEP opne message to channel buffer. + */ + public static class Writer implements PcepMessageWriter<PcepOpenMsgVer1> { + + @Override + public void write(ChannelBuffer cb, PcepOpenMsgVer1 message) throws PcepParseException { + int startIndex = cb.writerIndex(); + // first 3 bits set to version + cb.writeByte((byte) (PACKET_VERSION << PcepMessageVer1.SHIFT_FLAG)); + // message type + cb.writeByte(MSG_TYPE.getType()); + // length is length of variable message, will be updated at the end + // Store the position of message + // length in buffer + + int msgLenIndex = cb.writerIndex(); + cb.writeShort(0); + + message.getPcepOpenObject().write(cb); + + // update message length field + int iLength = cb.writerIndex() - startIndex; + cb.setShort(msgLenIndex, (short) iLength); + } + } + + @Override + public String toString() { + return MoreObjects.toStringHelper(getClass()) + .add("OpenObject", pcepOpenObj) + .toString(); + } +} |