// 获得单个消息
// 发生错误时返回 false,上层需要处理
public bool GetRcvMessage(ref UInt16 msgCommand, ref byte[] msgBuffer, ref Int32 bufferOffset, ref Int32 msgLength, ref bool setSecurityPolicy)
{
msgCommand = 0;
msgLength = 0;
msgBuffer = null;
bufferOffset = 0;
// 判断是否设置安全策略
/*if (!setSecurityPolicy)
* {
* Int32 policyMsgLength = Encoding.ASCII.GetBytes(policySecurity).Length;
* if (GetDataLength() > policyMsgLength)
* {
* Trace.Assert(false, "Security policy msg length err");
* return false;
* }
*
* if (GetDataLength() < policyMsgLength)
* return true;
* else
* {
* byte[] policyMsg = new byte[GetDataLength()];
* Buffer.BlockCopy(GetDataBuffer(), GetReadPosition(), policyMsg, 0, GetDataLength());
* if (Encoding.Default.GetString(policyMsg) == policySecurity)
* {
* setSecurityPolicy = true;
* return true;
* }
* else
* return false;
* }
* }*/
if (GetDataLength() <= NetGlobalData.GetInstance().GetMsgHeadSize())
{
return(true);
}
if (!ReadyReadData(NetGlobalData.GetInstance().GetMsgHeadSize()))
{
Trace.Assert(false, "ReadyReadData failed");
return(false);
}
msgHead.Reset();
/*if (!Utilitys.BytesToStruct<NetMsgHead>(GetDataBuffer(), GetReadPosition(), NetGlobalData.GetInstance().GetMsgHeadSize(), ref msgHead))
* {
* Trace.Assert(false, "BytesToStruct failed");
* return false;
* }*/
if (!Utilitys.BytesToStruct <NetMsgHead2>(GetDataBuffer(), GetReadPosition(), NetGlobalData.GetInstance().GetMsgHeadSize(), ref msgHead))
{
Trace.Assert(false, "BytesToStruct failed");
return(false);
}
//is zip
if (msgHead.msgCompressed == 0x01)
{
msgCommand = 1;
}
//byte[] bytes = GetDataBuffer() ;
msgHead.msgLength = Utilitys.BytesToBigEndian32Bit(GetDataBuffer(), GetReadPosition());
// 检查消息的长度有效性
if (msgHead.msgLength > (UInt16)NETGLOBALDATA.maxSendPackLength)
{
Trace.Assert(false, "msgHead.msgLength is too long");
return(false);
}
// TODO<szk>:添加检查效验值
// 检查数据是否足够长
if ((msgHead.msgLength + NetGlobalData.GetInstance().GetMsgHeadSize()) > GetDataLength())
{
return(true);
}
// 准备读取消息+头
if (!ReadyReadData(msgHead.msgLength + NetGlobalData.GetInstance().GetMsgHeadSize()))
{
Trace.Assert(false, "ReadyReadData failed");
return(false);
}
// TODO<szk>:添加解密
Trace.Assert(GetReadPosition() >= 0, "Read Position is err");
msgBuffer = GetDataBuffer();
bufferOffset = GetReadPosition() + NetGlobalData.GetInstance().GetMsgHeadSize();
msgLength = msgHead.msgLength;
//msgCommand = msgHead.msgCommand;
return(true);
}