?? mfnettraffic.cpp
字號:
#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"
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
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;
}
/*
Window NT/2000: When calling the RegQueryValueEx function with hKey set to the
HKEY_PERFORMANCE_DATA handle and a value string of a specified object, the
returned data structure sometimes has unrequested objects. Don't be surprised;
this is normal behavior. When calling the RegQueryValueEx function, you should
always expect to walk the returned data structure to look for the requested object.
*/
//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
/*
HKEY_PERFORMANCE_DATA:
Windows NT/2000/XP: Registry entries subordinate to this key allow you to
access performance data. The data is not actually stored in the registry;
the registry functions cause the system to collect the data from its source.
*/
/*
*/
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_COUNTER_DEFINITION *counterPtr = FirstCounter(objectPtr);
// 遍歷鏈表
for(int b=0 ; b<(int)objectPtr->NumCounters ; b++)
{
// 判斷接收的數據類型是否是我們需要的
if((int)counterPtr->CounterNameTitleIndex == CurrentTrafficType)
processIdOffset = counterPtr->CounterOffset;
// 下一個計數器
counterPtr = NextCounter(counterPtr);
}
//數據類型不是我們需要的
if(processIdOffset == ULONG_MAX) {
delete [] data;
return 1;
}
// 找到第一個實列(instance)
PERF_INSTANCE_DEFINITION *instancePtr = FirstInstance(objectPtr);
DWORD fullTraffic;
DWORD traffic;
//遍歷整個實列
for(b=0 ; b<objectPtr->NumInstances ; b++)
{
wchar_t *namePtr = (wchar_t *) ((BYTE *)instancePtr + instancePtr->NameOffset);
// 得到這個實列的PERF_COUNTER_BLOCK
PERF_COUNTER_BLOCK *counterBlockPtr = GetCounterBlock(instancePtr);
// 現在我們得到了接口的名字
char *pName = WideToMulti(namePtr, nameBuffer, sizeof(nameBuffer));
CString iName;
iName.Format("%s",pName);
POSITION pos = TotalTraffics.FindIndex(b);
if(pos!=NULL)
{
fullTraffic = *((DWORD *) ((BYTE *)counterBlockPtr + processIdOffset));
TotalTraffics.SetAt(pos,fullTraffic);
}
// 如果當前的接口就是我們選擇的接口
if(InterfaceName == iName)
{
traffic = *((DWORD *) ((BYTE *)counterBlockPtr + processIdOffset));
double acttraffic = (double)traffic;
double trafficdelta;
// 判斷處理的接口是否是新的
if(CurrentInterface != interfaceNumber)
{
lasttraffic = acttraffic;
trafficdelta = 0.0;
CurrentInterface = interfaceNumber;
}
else
{
trafficdelta = acttraffic - lasttraffic;
lasttraffic = acttraffic;
}
delete [] data;
return(trafficdelta);
}
//下一個實列
instancePtr = NextInstance(instancePtr);
}
}
// 下一個對象
objectPtr = NextObject(objectPtr);
}
delete [] data;
return 0;
}
catch(...)
{
return 0;
}
}
//枚舉安裝的接口
BOOL MFNetTraffic::GetInterfaces()
{
try
{
#define DEFAULT_BUFFER_SIZE 40960L
Interfaces.RemoveAll();
unsigned char *data = (unsigned char*)malloc(DEFAULT_BUFFER_SIZE);
DWORD type;
DWORD size = DEFAULT_BUFFER_SIZE;
DWORD ret;
char s_key[4096];
sprintf( s_key , "%d" , 510 );
//RegQueryValueEx的固定調用格式
while((ret = RegQueryValueEx(HKEY_PERFORMANCE_DATA, s_key, 0, &type, data, &size)) != ERROR_SUCCESS) {
while(ret == ERROR_MORE_DATA)
{
size += DEFAULT_BUFFER_SIZE;
data = (unsigned char*) realloc(data, size);
}
if(ret != ERROR_SUCCESS)
{
return FALSE;
}
}
//得到數據塊
PERF_DATA_BLOCK *dataBlockPtr = (PERF_DATA_BLOCK *)data;
//得到第一個對象
PERF_OBJECT_TYPE *objectPtr = FirstObject(dataBlockPtr);
for(int a=0 ; a<(int)dataBlockPtr->NumObjectTypes ; a++)
{
char nameBuffer[255];
if(objectPtr->ObjectNameTitleIndex == 510)
{
DWORD processIdOffset = ULONG_MAX;
PERF_COUNTER_DEFINITION *counterPtr = FirstCounter(objectPtr);
for(int b=0 ; b<(int)objectPtr->NumCounters ; b++)
{
if(counterPtr->CounterNameTitleIndex == 520)
processIdOffset = counterPtr->CounterOffset;
counterPtr = NextCounter(counterPtr);
}
if(processIdOffset == ULONG_MAX) {
free(data);
return 1;
}
PERF_INSTANCE_DEFINITION *instancePtr = FirstInstance(objectPtr);
for(b=0 ; b<objectPtr->NumInstances ; b++)
{
wchar_t *namePtr = (wchar_t *) ((BYTE *)instancePtr + instancePtr->NameOffset);
PERF_COUNTER_BLOCK *counterBlockPtr = GetCounterBlock(instancePtr);
char *pName = WideToMulti(namePtr, nameBuffer, sizeof(nameBuffer));
DWORD bandwith = *((DWORD *) ((BYTE *)counterBlockPtr + processIdOffset));
DWORD tottraff = 0;
Interfaces.AddTail(CString(pName));
Bandwidths.AddTail(bandwith);
TotalTraffics.AddTail(tottraff); // initial 0, just for creating the list
instancePtr = NextInstance(instancePtr);
}
}
objectPtr = NextObject(objectPtr);
}
free(data);
return TRUE;
}
catch(...)
{
return FALSE;
}
}
//返回安裝的接口數
int MFNetTraffic::GetNetworkInterfacesCount()
{
return Interfaces.GetCount()-1;
}
//返回接口名稱
BOOL MFNetTraffic::GetNetworkInterfaceName(CString *InterfaceName, int index)
{
POSITION pos = Interfaces.FindIndex(index);
if(pos==NULL)
return FALSE;
InterfaceName->Format("%s",Interfaces.GetAt(pos));
return TRUE;
}
//返回接口帶寬
DWORD MFNetTraffic::GetInterfaceBandwidth(int index)
{
POSITION pos = Bandwidths.FindIndex(index);
if(pos==NULL)
return 0;
else
return Bandwidths.GetAt(pos) / 8;
}
//具體接口接收和發送的數據量
DWORD MFNetTraffic::GetInterfaceTotalTraffic(int index)
{
DWORD totaltraffic = 0;
POSITION pos;
pos= TotalTraffics.FindIndex(index);
if(pos!=NULL)
{
totaltraffic = TotalTraffics.GetAt(pos);
if(totaltraffic == 0.0)
{
GetTraffic(index);
pos= TotalTraffics.FindIndex(index);
if(pos!=NULL)
{
totaltraffic = TotalTraffics.GetAt(pos);
}
}
}
return(totaltraffic);
}
void MFNetTraffic::SetTrafficType(int trafficType)
{
CurrentTrafficType = trafficType;
}
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