#include?“stdafx.h“
#include?“MFNetTraffic.h“
#include?“float.h“
#ifdef?_DEBUG
#undef?THIS_FILE
static?char?THIS_FILE[]=__FILE__;
#define?new?DEBUG_NEW
#endif
#include?“winperf.h“
MFNetTraffic::MFNetTraffic（）
{
	lasttraffic?=?0.0;
	CurrentInterface?=?-1;
	CurrentTrafficType?=?AllTraffic;
	GetInterfaces（）;
}
MFNetTraffic::~MFNetTraffic（）
{
	
}
PERF_object_TYPE?*Firstobject（PERF_DATA_BLOCK?*dataBlock）
{
??return?（PERF_object_TYPE?*）?（（BYTE?*）dataBlock?+?dataBlock->HeaderLength）;
}
PERF_object_TYPE?*Nextobject（PERF_object_TYPE?*act）
{
??return?（PERF_object_TYPE?*）?（（BYTE?*）act?+?act->TotalByteLength）;
}
PERF_COUNTER_DEFINITION?*FirstCounter（PERF_object_TYPE?*perfobject）
{
??return?（PERF_COUNTER_DEFINITION?*）?（（BYTE?*）?perfobject?+?perfobject->HeaderLength）;
}
PERF_COUNTER_DEFINITION?*NextCounter（PERF_COUNTER_DEFINITION?*perfCounter）
{
??return?（PERF_COUNTER_DEFINITION?*）?（（BYTE?*）?perfCounter?+?perfCounter->ByteLength）;
}
PERF_COUNTER_BLOCK?*GetCounterBlock（PERF_INSTANCE_DEFINITION?*pInstance）
{
??return?（PERF_COUNTER_BLOCK?*）?（（BYTE?*）pInstance?+?pInstance->ByteLength）;
}
PERF_INSTANCE_DEFINITION?*FirstInstance?（PERF_object_TYPE?*pobject）
{
??return?（PERF_INSTANCE_DEFINITION?*）??（（BYTE?*）?pobject?+?pobject->DefinitionLength）;
}
PERF_INSTANCE_DEFINITION?*NextInstance?（PERF_INSTANCE_DEFINITION?*pInstance）
{
??PERF_COUNTER_BLOCK??*pCtrBlk?=?GetCounterBlock（pInstance）;
??return?（PERF_INSTANCE_DEFINITION?*）?（（BYTE?*）pInstance?+?pInstance->ByteLength?+?pCtrBlk->ByteLength）;
}
char?*WideToMulti（wchar_t?*source?char?*dest?int?size）
{
??WideCharToMultiByte（CP_ACP?0?source?-1?dest?size?0?0）;
??return?dest;
}



//得到接口號為interfaceNumber的接口流量
double?MFNetTraffic::GetTraffic（int?interfaceNumber）
{
	try
	{
#define?DEFAULT_BUFFER_SIZE?40960L
		POSITION?pos;
		CString?InterfaceName;
		pos?=?Interfaces.FindIndex（interfaceNumber）;
		if（pos==NULL）
			return?0.0;
		//得到當前的接口名字
		InterfaceName?=?Interfaces.GetAt（pos）;
		//為性能數據緩沖
		unsigned?char?*data?=?new?unsigned?char?[DEFAULT_BUFFER_SIZE];
		//?從RegQueryValueEx返回的值:本例中忽略改變量
		DWORD?type;
		//?緩沖的尺寸
		DWORD?size?=?DEFAULT_BUFFER_SIZE;
		//?RegQueryValueEx返回的值
		DWORD?ret;
		//?從網絡對象（索引是510）查詢性能數據
		while（（ret?=?RegQueryValueEx（
			HKEY_PERFORMANCE_DATA?“510“?NULL?&type?data?&size））?!=?ERROR_SUCCESS）?
		{
			if（ret?==?ERROR_MORE_DATA）?
			{
				//?緩沖尺寸太小，增加內存分配
				size?+=?DEFAULT_BUFFER_SIZE;		
				delete?[]?data;
				data?=?new?unsigned?char?[size];
			}?
			else?
			{
				//?未定義的錯誤
				return?1;
			}
		}
		//性能數據塊
		PERF_DATA_BLOCK?*dataBlockPtr?=?（PERF_DATA_BLOCK?*）data;
		//枚舉鏈表中第一個對象
		PERF_object_TYPE?*objectPtr?=?Firstobject（dataBlockPtr）;
		//遍歷鏈表?
		for（int?a=0?;?a<（int）dataBlockPtr->NumobjectTypes?;?a++）?
		{
			char?nameBuffer[255];
			//?判斷是否是網絡對象索引號是510
			if（objectPtr->objectNametitleIndex?==?510）?
			{
				//?偏移變量
				DWORD?processIdOffset?=?ULONG_MAX;
				//?找到第一個計數器
				PERF_COUN