检测com端口代码实现
作者：互联网
1：scan
HRESULT CDevHound::Scan(const vector<CString> &guiInfo, vector<DEV_INFO> &vPortInfo) // scan port
{
HDEVINFO hDevInfo;
SP_DEVINFO_DATA DeviceInfoData;
DWORD i;
DEV_INFO epi;
// Create a HDEVINFO with all present devices.
hDevInfo = SetupDiGetClassDevs((LPGUID)&GUID_DEVCLASS_PORTS,
0, // Enumerator
0,
DIGCF_PRESENT);
if (hDevInfo == INVALID_HANDLE_VALUE)
{
// Insert error handling here.
return 1;
}
// Enumerate through all devices in Set.
DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
for(DWORD i = 0; SetupDiEnumDeviceInfo(hDevInfo,i,&DeviceInfoData); i++)
{
memset( &epi,0,sizeof(epi) );
int msgType = WM_DEV_MSG;
TCHAR szDIS[MAX_PATH] = {0};
DWORD nsize = 0;
memset( &szDIS, 0, MAX_PATH);
DWORD DataT;
LPTSTR buffer = NULL;
DWORD buffersize = 0;
memset( &epi,0,sizeof(epi) );
if(FALSE==m_bWork)
{
break;
}
//
// Call function with null to begin with,
// then use the returned buffer size
// to Alloc the buffer. Keep calling until
// success or an unknown failure.
//
while (!SetupDiGetDeviceRegistryProperty(
hDevInfo,
&DeviceInfoData,
SPDRP_FRIENDLYNAME,
&DataT,
(PBYTE)buffer,
buffersize,
&buffersize))
{
if (GetLastError() ==
ERROR_INSUFFICIENT_BUFFER)
{
// Change the buffer size.
if (buffer) LocalFree(buffer);
buffer = (LPTSTR)LocalAlloc(LPTR,buffersize);
}
else
{
// Insert error handling here.
break;
}
}
SetupDiGetDeviceRegistryProperty( hDevInfo, &DeviceInfoData, SPDRP_FRIENDLYNAME, NULL,(PBYTE)epi.szFriendlyName, DEV_NAME_MAX_LEN*sizeof(TCHAR), NULL);
// Get port description from registry
SetupDiGetDeviceRegistryProperty( hDevInfo, &DeviceInfoData, SPDRP_DEVICEDESC, NULL,(PBYTE)epi.szDescription, DEV_NAME_MAX_LEN*sizeof(TCHAR), NULL);
HKEY hDevKey = SetupDiOpenDevRegKey( hDevInfo,&DeviceInfoData,DICS_FLAG_GLOBAL,0,DIREG_DEV,KEY_READ );
if( INVALID_HANDLE_VALUE != hDevKey )
{
// Get port name
DWORD dwCount = 256;
RegQueryValueEx( hDevKey,_T( "PortName" ),NULL,NULL,(BYTE*)epi.szPortName,&dwCount );
RegCloseKey( hDevKey );
}
// TCHAR szDIS[MAX_PATH] = {0};
// DWORD nsize = 0;
BOOL bGet = SetupDiGetDeviceInstanceId(hDevInfo, &DeviceInfoData, szDIS, sizeof(szDIS), &nsize);
if(TRUE==bGet)
{
tstring strid(szDIS);
tstring strchar(_T("\\"));
std::size_t pos = strid.rfind(_T("\\"));
strchar = strid.substr(0,pos);
if(GuidInfoFind(strchar, msgType,guiInfo))
{
pos = strid.find_first_of('&');
_tcscpy(epi.szVid,strid.substr(0,pos).c_str());
pos = strid.rfind(_T("\\"));
strchar = strid.substr(pos+1);
_tcscpy(epi.szGUID,strchar.c_str());
InsertPortInfo(epi, false, msgType,vPortInfo);
}
else
{
continue;
}
}
}
if(hDevInfo != INVALID_HANDLE_VALUE)
{
SetupDiDestroyDeviceInfoList(hDevInfo);
hDevInfo = INVALID_HANDLE_VALUE;
}
return S_OK;
}
2：detect for one type
UINT CDevHound::HoundThreadProc() //detect for one type port
{
GUID *guidDev = (GUID*)&GUID_CLASS_PORT;
HDEVINFO hDevInfo = INVALID_HANDLE_VALUE;
// Get Port class set
// Note:We use DIGCF_PRESENT flag,so maybe you can see
// some ports on the device manager,but they are not
// enumerated by SetupDiEnumDeviceInterfaces in the do-while
// loop,because their driver are disabled,no application
// can open and use them.
hDevInfo = SetupDiGetClassDevs( guidDev,
NULL,
NULL,
DIGCF_PRESENT | DIGCF_DEVICEINTERFACE
);
if(hDevInfo == INVALID_HANDLE_VALUE)
{
return 0;
}
SP_DEVICE_INTERFACE_DATA ifcData;
ifcData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
DWORD dwIndex = 0;
DEV_INFO epi;
bool bInit = true;
// Enumerate port and modem class device interfaces
do
{
memset( &epi,0,sizeof(epi) );
if( SetupDiEnumDeviceInterfaces(hDevInfo,NULL, guidDev, dwIndex, &ifcData) )
{
SP_DEVINFO_DATA devData;
devData.cbSize = sizeof( SP_DEVINFO_DATA );
if( !SetupDiGetDeviceInterfaceDetail( hDevInfo,&ifcData,NULL,0,NULL,&devData ) )
{
if( ERROR_INSUFFICIENT_BUFFER != GetLastError() )
{
// Can not get detail interface info
continue;
}
}
// Get Friendly name from registry
SetupDiGetDeviceRegistryProperty( hDevInfo, &devData, SPDRP_FRIENDLYNAME, NULL,(PBYTE)epi.szFriendlyName, DEV_NAME_MAX_LEN*sizeof(TCHAR), NULL);
// Get port description from registry
SetupDiGetDeviceRegistryProperty( hDevInfo, &devData, SPDRP_DEVICEDESC, NULL,(PBYTE)epi.szDescription, DEV_NAME_MAX_LEN*sizeof(TCHAR), NULL);
// Get class name from registry
//TCHAR szClass[EPI_MAX_LEN];
//SetupDiGetDeviceRegistryProperty( hDevInfo, &devData, SPDRP_CLASS, NULL,(PBYTE)szClass, EPI_MAX_LEN*sizeof(TCHAR), NULL);
//epi.nType = CheckDeviceClass( szClass );
HKEY hDevKey = SetupDiOpenDevRegKey( hDevInfo,&devData,DICS_FLAG_GLOBAL,0,DIREG_DEV,KEY_READ );
if( INVALID_HANDLE_VALUE != hDevKey )
{
// Get port name
DWORD dwCount = DEV_NAME_MAX_LEN;
RegQueryValueEx( hDevKey,_T( "PortName" ),NULL,NULL,(BYTE*)epi.szPortName,&dwCount );
RegCloseKey( hDevKey );
}
// Insert to port info array
TCHAR szDIS[MAX_PATH] = {0};
DWORD nsize = 0;
BOOL bGet = SetupDiGetDeviceInstanceId(hDevInfo, &devData, szDIS, sizeof(szDIS), &nsize);
if(TRUE==bGet)
{
tstring strid(szDIS);
tstring strchar(_T("\\"));
std::size_t pos = strid.rfind(_T("\\"));
std::size_t posbegin = strid.find_first_of('\\');
strchar = strid.substr(0,pos);
dwIndex++;
USES_CONVERSION;
if(tstring::npos != strchar.find(_T("USB\\VID_1782&PID_4D00")))
{
strchar = strchar.substr(posbegin+1,pos);
_tcscpy(epi.szVid,strchar.c_str());
pos = strid.rfind(_T("\\"));
strchar = strid.substr(pos+1);
tstring strcominfo(epi.szPortName);
tstring strcominfo2 = boost::to_lower_copy(strcominfo);
boost::erase_first(strcominfo2, "com");
_tcscpy(epi.szGUID,strcominfo2.c_str());
#if 0
string strlog;
ofstream out("d:\\scanport.log",ios::app);
strlog = convert<string>(bInit);
out <<"init="<< strlog << "\n";
out << W2A(epi.szDescription) << "\n";
out << W2A(epi.szFriendlyName)<< "\n";
#endif
for(size_t nthreadx=0; nthreadx<m_guidvec.size(); nthreadx++)
{
if(m_guidvec[nthreadx]==strcominfo2)
{
InsertPortInfo( epi,nthreadx, bInit);
#ifdef _WRITE_PORT_LOGFILE
string strthrdxlog;
string strinitlog;
strthrdxlog = convert<string>(nthreadx);
ofstream out("d:\\scanport2.log",ios::app);
strinitlog = convert<string>(bInit);
out <<"init="<< strinitlog << "\n";
out << "thread id= " << strthrdxlog << "\n";
#endif
}
}
}
}
}
else
{
if( ERROR_NO_MORE_ITEMS != GetLastError() )
{
dwIndex++;
continue;
}
dwIndex = 0;
bInit = false;
ClearState();
Sleep(1);
SetupDiDestroyDeviceInfoList(hDevInfo);
hDevInfo = INVALID_HANDLE_VALUE;
hDevInfo = SetupDiGetClassDevs( guidDev,
NULL,
NULL,
DIGCF_PRESENT | DIGCF_DEVICEINTERFACE
);
memset(&ifcData,0,sizeof(SP_DEVICE_INTERFACE_DATA));
ifcData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
}
}while( m_bWork && (hDevInfo != INVALID_HANDLE_VALUE) );
if(hDevInfo != INVALID_HANDLE_VALUE)
{
SetupDiDestroyDeviceInfoList(hDevInfo);
hDevInfo = INVALID_HANDLE_VALUE;
}
return 0;
}
标签：strid,代码,端口,hDevInfo,epi,sizeof,NULL,com,strchar 来源： https://www.cnblogs.com/manongdashu/p/10348837.html