| /* |
| * 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.PcepFactories; |
| import org.onosproject.pcepio.protocol.PcepMessage; |
| import org.onosproject.pcepio.protocol.PcepMessageReader; |
| 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 |
| static final byte WIRE_VERSION = 1; |
| static final int MINIMUM_LENGTH = 4; |
| static final int PACKET_VERSION = 1; |
| static final byte OPEN_MSG_TYPE = 0x1; |
| static final byte KEEPALIVE_MSG_TYPE = 0x2; |
| static final byte REPORT_MSG_TYPE = 0xa; |
| static final byte TE_REPORT_MSG_TYPE = 0xe; |
| static final byte UPDATE_MSG_TYPE = 0xb; |
| static final byte INITIATE_MSG_TYPE = 0xc; |
| static final byte CLOSE_MSG_TYPE = 0x7; |
| static final byte ERROR_MSG_TYPE = 0x6; |
| static final byte LABEL_UPDATE_MSG_TYPE = 0xD; |
| static final byte LABEL_RANGE_RESV_MSG_TYPE = 0xF; |
| public static final int SHIFT_FLAG = 5; |
| 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 { |
| |
| 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); |
| |
| switch (type) { |
| |
| case OPEN_MSG_TYPE: |
| log.debug("OPEN MESSAGE is received"); |
| // message type value 1 means it is open message |
| return PcepOpenMsgVer1.READER.readFrom(cb.readBytes(length)); |
| case KEEPALIVE_MSG_TYPE: |
| log.debug("KEEPALIVE MESSAGE is received"); |
| // message type value 2 means it is Keepalive message |
| return PcepKeepaliveMsgVer1.READER.readFrom(cb.readBytes(length)); |
| case ERROR_MSG_TYPE: |
| log.debug("ERROR MESSAGE is received"); |
| // message type value 6 means it is error message |
| return PcepErrorMsgVer1.READER.readFrom(cb.readBytes(length)); |
| case REPORT_MSG_TYPE: |
| log.debug("REPORT MESSAGE is received"); |
| // message type value 10 means it is Report message |
| // return |
| return PcepReportMsgVer1.READER.readFrom(cb.readBytes(length)); |
| case UPDATE_MSG_TYPE: |
| log.debug("UPDATE MESSAGE is received"); |
| //message type value 11 means it is Update message |
| return PcepUpdateMsgVer1.READER.readFrom(cb.readBytes(length)); |
| case INITIATE_MSG_TYPE: |
| log.debug("INITIATE MESSAGE is received"); |
| //message type value 12 means it is PcInitiate message |
| return PcepInitiateMsgVer1.READER.readFrom(cb.readBytes(length)); |
| case CLOSE_MSG_TYPE: |
| log.debug("CLOSE MESSAGE is received"); |
| // message type value 7 means it is Close message |
| return PcepCloseMsgVer1.READER.readFrom(cb.readBytes(length)); |
| case TE_REPORT_MSG_TYPE: |
| log.debug("TE REPORT MESSAGE is received"); |
| // message type value 14 means it is TE REPORT message |
| // return |
| return PcepTEReportMsgVer1.READER.readFrom(cb.readBytes(length)); |
| case LABEL_UPDATE_MSG_TYPE: |
| log.debug("LABEL UPDATE MESSAGE is received"); |
| // message type value 13 means it is LABEL UPDATE message |
| // return |
| return PcepLabelUpdateMsgVer1.READER.readFrom(cb.readBytes(length)); |
| case LABEL_RANGE_RESV_MSG_TYPE: |
| log.debug("LABEL RANGE RESERVE MESSAGE is received"); |
| // message type value 15 means it is LABEL RANGE RESERVE message |
| // return |
| return PcepLabelRangeResvMsgVer1.READER.readFrom(cb.readBytes(length)); |
| default: |
| 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); |
| } |
| } |
| } |
| } |