/// <summary>
/// 找到包头标志后，对数据进行处理
/// </summary>
/// <param name="nAlreadyRecCount">接收的数据长度</param>
/// <param name="nDataPointer">第几个字节开始为包头位置</param>
private void FindPackHead(int nAlreadyRecCount, int nDataPointer)
{
// 找到一个数据报头信息
// 网络包长度小于包头时不是一个完整的包
if (nAlreadyRecCount - nDataPointer < PacketHeadSize)
{
return;
}
PackHead m_PackHead = new PackHead();
SetPackHead(nDataPointer, ref m_PackHead);
// 判断获得的数据除去表头 是否大于数据长度
if (nAlreadyRecCount - nDataPointer - PacketHeadSize < m_PackHead.DataLength)
{
return;
}
//完整的包数据
byte[] m_ComData = new byte[PacketHeadSize + m_PackHead.DataLength];
Array.Copy(m_TmpData, nDataPointer, m_ComData, 0, PacketHeadSize + m_PackHead.DataLength);
PackData pd = new PackData();
pd.m_Index = m_lstPackData.Count;
pd.m_Head = m_PackHead;
pd.m_ByteData = m_ComData.ToList();
lock (m_lock)
{
nNetPos += PacketHeadSize + pd.m_Head.DataLength;
m_lstPackData.Add(pd);
}
}
/// <summary>
/// 设置包头
/// </summary>
private void SetPackHead(int nDataPointer, ref PackHead m_PackHead)
{
m_PackHead.Reset();
m_PackHead.m_Signature[0] = m_TmpData[nDataPointer];
m_PackHead.m_Signature[1] = m_TmpData[nDataPointer + 1];
m_PackHead.m_Signature[2] = m_TmpData[nDataPointer + 2];
m_PackHead.m_Signature[3] = m_TmpData[nDataPointer + 3];
m_PackHead.m_Command[0] = m_TmpData[nDataPointer + 4];
m_PackHead.m_Command[1] = m_TmpData[nDataPointer + 5];
m_PackHead.m_Command[2] = m_TmpData[nDataPointer + 6];
m_PackHead.m_Command[3] = m_TmpData[nDataPointer + 7];
m_PackHead.m_Length[0] = m_TmpData[nDataPointer + 8];
m_PackHead.m_Length[1] = m_TmpData[nDataPointer + 9];
m_PackHead.m_Length[2] = m_TmpData[nDataPointer + 10];
m_PackHead.m_Length[3] = m_TmpData[nDataPointer + 11];
m_PackHead.DataLength = BitConverter.ToInt32(m_PackHead.m_Length, 0);
m_PackHead.DataCommand = BitConverter.ToInt32(m_PackHead.m_Command, 0);
}
