private void _OnRead()
{
if (m_Socket.Available >= MessageConst.HEADER_LENGTH)
{
try {
byte[] buffer = new byte[MessageConst.HEADER_LENGTH];
//试读取消息头数据
m_Socket.Receive(buffer, MessageConst.HEADER_LENGTH, SocketFlags.Peek);
if (buffer.Length >= MessageConst.HEADER_LENGTH)//首先保证读取满足消息头的字节数据
{
byte[] headTemp = MessageParse.Decrypt(buffer, 4, MessageParse.CopyByteArray(RECEIVE_KEY));
System.Array.Reverse(headTemp, 0, 2);
System.Array.Reverse(headTemp, 2, 4);
short flag = System.BitConverter.ToInt16(headTemp, 0);
short len = System.BitConverter.ToInt16(headTemp, 2);
if (flag == MessageConst.HEADER) //验证标志符
{
if (len <= m_Socket.Available) //满足完整消息的字节长度
{
//解密头消息
headTemp = MessageParse.Decrypt(buffer, MessageConst.HEADER_LENGTH, MessageParse.CopyByteArray(RECEIVE_KEY));
//解析头信息数据
Message_Head head = MessageParse.UnParseHead(headTemp);
if (head == null)//验证头信息有效性
{
_OnError(new SocketException(10042));
Close();
}
else
{
int iLength = head.Length;
buffer = new byte[iLength];
m_Socket.Receive(buffer, 0, buffer.Length, SocketFlags.None);
//解密字节数据
byte[] buffer1 = MessageParse.Decrypt(buffer, iLength, MessageParse.CopyByteArray(RECEIVE_KEY));
//正式解析整个消息信息数据
MessageData data = MessageParse.UnParse(buffer1);
if (data != null)
{
//计算数据校验和
int checksum = MessageParse.CalculateCheckSum(buffer1);
//验证校验和有效性
if (checksum == data.head.CHECK_SUM)
{
lock (_lock)
{
m_Datas.Enqueue(data);
}
}
}
else
{
_OnError(new SocketException(10042));
Close();
}
}
}
}
}
}
catch (ObjectDisposedException)
{
Close();
}
catch (SocketException ex) {
_OnError(ex);
Close();
}
}
}