diff options
author | Ashlee Young <ashlee@wildernessvoice.com> | 2015-12-01 05:49:27 -0800 |
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committer | Ashlee Young <ashlee@wildernessvoice.com> | 2015-12-01 05:49:27 -0800 |
commit | e63291850fd0795c5700e25e67e5dee89ba54c5f (patch) | |
tree | 9707289536ad95bb739c9856761ad43275e07d8c /framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepKeepaliveMsgVer1.java | |
parent | 671823e12bc13be9a8b87a5d7de33da1bb7a44e8 (diff) |
onos commit hash c2999f30c69e50df905a9d175ef80b3f23a98514
Change-Id: I2bb8562c4942b6d6a6d60b663db2e17540477b81
Signed-off-by: Ashlee Young <ashlee@wildernessvoice.com>
Diffstat (limited to 'framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepKeepaliveMsgVer1.java')
-rw-r--r-- | framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepKeepaliveMsgVer1.java | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepKeepaliveMsgVer1.java b/framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepKeepaliveMsgVer1.java new file mode 100644 index 00000000..8b6e9382 --- /dev/null +++ b/framework/src/onos/protocols/pcep/pcepio/src/main/java/org/onosproject/pcepio/protocol/ver1/PcepKeepaliveMsgVer1.java @@ -0,0 +1,154 @@ +/* + * 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.PcepKeepaliveMsg; +import org.onosproject.pcepio.protocol.PcepMessageReader; +import org.onosproject.pcepio.protocol.PcepMessageWriter; +import org.onosproject.pcepio.protocol.PcepType; +import org.onosproject.pcepio.protocol.PcepVersion; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.google.common.base.MoreObjects; + +/** + * Provides PCEP keep alive message. + */ +class PcepKeepaliveMsgVer1 implements PcepKeepaliveMsg { + + /* + <Keepalive Message>::= <Common Header> + + 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 | + +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ + */ + + protected static final Logger log = LoggerFactory.getLogger(PcepKeepaliveMsgVer1.class); + // Pcep version: 1 + public static final byte PACKET_VERSION = 1; + public static final int PACKET_MINIMUM_LENGTH = 4; + public static final PcepType MSG_TYPE = PcepType.KEEP_ALIVE; + + public static final PcepKeepaliveMsgVer1.Reader READER = new Reader(); + + /** + * Reader class for reading PCEP keepalive message from channel buffer. + */ + static class Reader implements PcepMessageReader<PcepKeepaliveMsg> { + + @Override + public PcepKeepaliveMsg readFrom(ChannelBuffer cb) throws PcepParseException { + + if (cb.readableBytes() < PACKET_MINIMUM_LENGTH) { + throw new PcepParseException("Packet size is less than the minimum required length."); + } + // fixed value property version == 1 + byte version = cb.readByte(); + version = (byte) (version >> PcepMessageVer1.SHIFT_FLAG); + if (version != PACKET_VERSION) { + throw new PcepParseException("Wrong version: Expected=PcepVersion.KEEP_ALIVE_1(2), got=" + version); + } + // fixed value property type == 2 + byte type = cb.readByte(); + if (type != MSG_TYPE.getType()) { + throw new PcepParseException("Wrong type: Expected=PcepType.KEEP_ALIVE_1(2), got=" + type); + } + short length = cb.readShort(); + if (length < PACKET_MINIMUM_LENGTH) { + throw new PcepParseException("Wrong length: Expected to be >= " + PACKET_MINIMUM_LENGTH + ", was: " + + length); + } + return new PcepKeepaliveMsgVer1(); + } + } + + /** + * Default constructor. + */ + PcepKeepaliveMsgVer1() { + } + + /** + * Builder class for PCEP keepalive message. + */ + static class Builder implements PcepKeepaliveMsg.Builder { + @Override + public PcepVersion getVersion() { + return PcepVersion.PCEP_1; + } + + @Override + public PcepType getType() { + return PcepType.KEEP_ALIVE; + } + + @Override + public PcepKeepaliveMsg build() { + return new PcepKeepaliveMsgVer1(); + } + } + + @Override + public void writeTo(ChannelBuffer cb) { + WRITER.write(cb, this); + } + + static final Writer WRITER = new Writer(); + + /** + * Writer class for writing the PCEP keepalive message to channel buffer. + */ + static class Writer implements PcepMessageWriter<PcepKeepaliveMsgVer1> { + + @Override + public void write(ChannelBuffer cb, PcepKeepaliveMsgVer1 message) { + 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((short) 0); + // update message length field + int length = cb.writerIndex() - startIndex; + cb.setShort(msgLenIndex, (short) length); + } + } + + @Override + public PcepVersion getVersion() { + return PcepVersion.PCEP_1; + } + + @Override + public PcepType getType() { + return MSG_TYPE; + } + + @Override + public String toString() { + return MoreObjects.toStringHelper(getClass()).toString(); + } +} |