| /* |
| * 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.PcepOutOfBoundMessageException; |
| import org.onosproject.pcepio.exceptions.PcepParseException; |
| import org.onosproject.pcepio.protocol.PcepFactories; |
| import org.onosproject.pcepio.protocol.PcepMessage; |
| import org.onosproject.pcepio.protocol.PcepMessageReader; |
| import org.onosproject.pcepio.protocol.PcepType; |
| import org.onosproject.pcepio.types.PcepErrorDetailInfo; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Provides PCEP messages. |
| */ |
| public abstract class PcepMessageVer1 { |
| |
| protected static final Logger log = LoggerFactory.getLogger(PcepFactories.class); |
| |
| // version: 1.0 |
| public static final byte WIRE_VERSION = 1; |
| public static final int MINIMUM_LENGTH = 4; |
| public static final int PACKET_VERSION = 1; |
| public static final int SHIFT_FLAG = 5; |
| public static final int MINIMUM_COMMON_HEADER_LENGTH = 4; |
| |
| public static final PcepMessageVer1.Reader READER = new Reader(); |
| |
| /** |
| * Reader class for reading PCEP messages from channel buffer. |
| */ |
| static class Reader implements PcepMessageReader<PcepMessage> { |
| @Override |
| public PcepMessage readFrom(ChannelBuffer cb) throws PcepParseException, PcepOutOfBoundMessageException { |
| |
| if (cb.readableBytes() < MINIMUM_LENGTH) { |
| throw new PcepParseException("Packet should have minimum length: " + MINIMUM_LENGTH); |
| } |
| |
| try { |
| int start = cb.readerIndex(); |
| // fixed value property version == 1 |
| byte version = cb.readByte(); |
| version = (byte) (version >> PcepMessageVer1.SHIFT_FLAG); |
| if (version != (byte) PACKET_VERSION) { |
| throw new PcepParseException("Wrong version. Expected=PcepVersion.Message_1(1), got=" + version); |
| } |
| |
| byte type = cb.readByte(); |
| short length = cb.readShort(); |
| cb.readerIndex(start); |
| |
| // Check the out-of-bound message. |
| // If the message is out-of-bound then throw PcepOutOfBoundException. |
| if ((length - MINIMUM_COMMON_HEADER_LENGTH) > cb.readableBytes()) { |
| throw new PcepOutOfBoundMessageException("Message is out-of-bound."); |
| } |
| |
| if (type == (byte) PcepType.OPEN.getType()) { |
| log.debug("OPEN MESSAGE is received"); |
| return PcepOpenMsgVer1.READER.readFrom(cb.readBytes(length)); |
| } else if (type == (byte) PcepType.KEEP_ALIVE.getType()) { |
| log.debug("KEEPALIVE MESSAGE is received"); |
| return PcepKeepaliveMsgVer1.READER.readFrom(cb.readBytes(length)); |
| } else if (type == (byte) PcepType.ERROR.getType()) { |
| log.debug("ERROR MESSAGE is received"); |
| return PcepErrorMsgVer1.READER.readFrom(cb.readBytes(length)); |
| } else if (type == (byte) PcepType.CLOSE.getType()) { |
| log.debug("CLOSE MESSAGE is received"); |
| return PcepCloseMsgVer1.READER.readFrom(cb.readBytes(length)); |
| } else if (type == (byte) PcepType.REPORT.getType()) { |
| log.debug("REPORT MESSAGE is received"); |
| return PcepReportMsgVer1.READER.readFrom(cb.readBytes(length)); |
| } else if (type == (byte) PcepType.UPDATE.getType()) { |
| log.debug("UPDATE MESSAGE is received"); |
| return PcepUpdateMsgVer1.READER.readFrom(cb.readBytes(length)); |
| } else if (type == (byte) PcepType.INITIATE.getType()) { |
| log.debug("INITIATE MESSAGE is received"); |
| return PcepInitiateMsgVer1.READER.readFrom(cb.readBytes(length)); |
| } else if (type == (byte) PcepType.LS_REPORT.getType()) { |
| log.debug("LS REPORT MESSAGE is received"); |
| return PcepLSReportMsgVer1.READER.readFrom(cb.readBytes(length)); |
| } else if (type == (byte) PcepType.LABEL_RANGE_RESERV.getType()) { |
| log.debug("LABEL RANGE RESERVE MESSAGE is received"); |
| return PcepLabelRangeResvMsgVer1.READER.readFrom(cb.readBytes(length)); |
| } else if (type == (byte) PcepType.LABEL_UPDATE.getType()) { |
| log.debug("LABEL UPDATE MESSAGE is received"); |
| return PcepLabelUpdateMsgVer1.READER.readFrom(cb.readBytes(length)); |
| } else { |
| throw new PcepParseException("ERROR: UNKNOWN MESSAGE is received. Msg Type: " + type); |
| } |
| } catch (IndexOutOfBoundsException e) { |
| throw new PcepParseException(PcepErrorDetailInfo.ERROR_TYPE_1, PcepErrorDetailInfo.ERROR_VALUE_1); |
| } |
| } |
| } |
| } |