/// <summary>
/// Parse MCS Common Header
/// (parser index is updated according to parsed length)
/// </summary>
/// <param name="data">data to be parsed</param>
/// <param name="currentIndex">current parser index</param>
/// <param name="securityHeaderType">security header type</param>
/// <returns>MCS Common Header</returns>
private SlowPathPduCommonHeader ParseMcsCommonHeader(
byte[] data,
ref int currentIndex,
SecurityHeaderType securityHeaderType)
{
SlowPathPduCommonHeader header = new SlowPathPduCommonHeader();
// McsCommonHeader: TpktHeader
header.tpktHeader = ParseTpktHeader(data, ref currentIndex);
// McsCommonHeader: x224Data
header.x224Data = ParseX224Data(data, ref currentIndex);
// McsCommonHeader: type
header.type = ParseByte(data, ref currentIndex);
// McsCommonHeader: initiator
header.initiator = (UInt16)(ParseUInt16(data, ref currentIndex, true)
+ ConstValue.CHANNEL_INITIATOR_FILTER);
// McsCommonHeader: channelId
header.channelId = ParseUInt16(data, ref currentIndex, true);
// McsCommonHeader: level(dataPriority & segmentation)
header.level = ParseByte(data, ref currentIndex);
// McsCommonHeader: user data length
byte length1 = ParseByte(data, ref currentIndex);
if ((length1 & 0x80) == 0x80)
{
byte length2 = ParseByte(data, ref currentIndex);
header.userDataLength = (uint)(((length1 & 0x7F) << 8) + length2);
}
else
{
header.userDataLength = length1;
}
// McsCommonHeader: securityHeader
header.securityHeader = ParseTsSecurityHeader(data, ref currentIndex, securityHeaderType);
return header;
}
