/* | |
* | |
* Licensed to the Apache Software Foundation (ASF) under one | |
* or more contributor license agreements. See the NOTICE file | |
* distributed with this work for additional information | |
* regarding copyright ownership. The ASF licenses this file | |
* to you 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. | |
* | |
*/ | |
using System; | |
using System.IO; | |
namespace org.apache.qpid.transport.network | |
{ | |
public sealed class Frame : NetworkEvent | |
{ | |
internal static int HEADER_SIZE = 12; | |
// XXX: enums? | |
public const byte L1 = 0; | |
public const byte L2 = 1; | |
public const byte L3 = 2; | |
public const byte L4 = 3; | |
public static byte RESERVED = 0x0; | |
public static byte VERSION = 0x0; | |
public static byte FIRST_SEG = 0x8; | |
public static byte LAST_SEG = 0x4; | |
public static byte FIRST_FRAME = 0x2; | |
public static byte LAST_FRAME = 0x1; | |
private readonly byte flags; | |
private readonly SegmentType type; | |
private readonly byte track; | |
private readonly int channel; | |
private readonly MemoryStream body; | |
private int _bodySize; | |
public Frame(byte flags, SegmentType type, byte track, int channel, int bodySize, | |
MemoryStream body) | |
{ | |
this.flags = flags; | |
this.type = type; | |
this.track = track; | |
this.channel = channel; | |
this.body = body; | |
_bodySize = bodySize; | |
} | |
public int BodySize | |
{ | |
get { return _bodySize; } | |
} | |
public MemoryStream Body | |
{ | |
get { return body; } | |
} | |
public byte Flags | |
{ | |
get { return flags; } | |
} | |
public int Channel | |
{ | |
get { return channel; } | |
} | |
public int Size | |
{ | |
get { return (int) body.Length;} | |
} | |
public SegmentType Type | |
{ | |
get { return type; } | |
} | |
public byte Track | |
{ | |
get { return track; } | |
} | |
private bool flag(byte mask) | |
{ | |
return (flags & mask) != 0; | |
} | |
public bool isFirstSegment() | |
{ | |
return flag(FIRST_SEG); | |
} | |
public bool isLastSegment() | |
{ | |
return flag(LAST_SEG); | |
} | |
public bool isFirstFrame() | |
{ | |
return flag(FIRST_FRAME); | |
} | |
public bool isLastFrame() | |
{ | |
return flag(LAST_FRAME); | |
} | |
#region NetworkEvent Methods | |
public void ProcessNetworkEvent(NetworkDelegate ndelegate) | |
{ | |
ndelegate.Frame(this); | |
} | |
#endregion | |
public String toString() | |
{ | |
return String.Format | |
("[{0:d} {1:d} {2:d} {3} {4}{5}{6}{7}] ", Channel, Size, Track, Type, | |
isFirstSegment() ? 1 : 0, isLastSegment() ? 1 : 0, | |
isFirstFrame() ? 1 : 0, isLastFrame() ? 1 : 0); | |
} | |
} | |
} |