Q: How can I change the static IP assigned to my development system at run-time?
To change a static IP address you must do two things:
- Change the adapter's registry settings
You must change the following keys:- EnableDHCP
- IpAddress
- DNS
- DefaultGateway
- Subnetmask
As an example, the keys for the on-board adapter for ADS devices would be in the following location:
HKEY_LOCAL_MACHINE\Comm\SMC90001\Parms\TcpIp
- Rebind the adapter through code
The following code shows how to rebind the on-board adapters for ADS devices.
#include
#define FILE_ANY_ACCESS 0
#define METHOD_OUT_DIRECT 2
#define FILE_DEVICE_PHYSICAL_NETCARD 0x00000017
#define WINCE_IOCTL_START 8
#define DD_NDIS_DEVICE_NAME TEXT("NDS0:")
#define CTL_CODE( DeviceType, Function, Method, Access ) ( \
((DeviceType) << 16) | ((Access) << 14) | ((Function) << 2) | (Method) )
#define _NDIS_CONTROL_CODE(request,method) CTL_CODE(FILE_DEVICE_PHYSICAL_NETCARD, request, method, FILE_ANY_ACCESS)
#define IOCTL_NDIS_REBIND_ADAPTER (_NDIS_CONTROL_CODE( WINCE_IOCTL_START+3, METHOD_OUT_DIRECT ))
#define ADAPTER_NAME _T("SMC90001")
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hInstPrev,
LPWSTR pszCmdLine, int nCmdShow)
{
// open the NDIS driver
HANDLE hNdis = ::CreateFile(DD_NDIS_DEVICE_NAME, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_ALWAYS,
0, NULL);
// rebind out adapter
DeviceIoControl(hNdis,
IOCTL_NDIS_REBIND_ADAPTER,
ADAPTER_NAME,
_tcslen(ADAPTER_NAME) + 1,
NULL,
NULL,
NULL,
NULL);
// close the driver
CloseHandle (hNdis);
return 0;
}
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Microsoft Windows CE
Changing Static IP at run time
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Posted - 08 Jul 2003 : 15:37:14
