dhcp.h File Reference

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Functions
DWORD	getDhcpInfoForAdapter (DWORD AdapterIndex, PIP_ADAPTER_INFO ptr)

Function Documentation

getDhcpInfoForAdapter()

DWORD getDhcpInfoForAdapter	(	DWORD	AdapterIndex,
		PIP_ADAPTER_INFO	ptr
	)

Definition at line 12 of file dhcp_reactos.c.

{
    const char *ifname = NULL;
    HKEY hKeyInterfaces = NULL, hKeyInterface = NULL;
    DWORD dwValue, dwSize, dwType;
    DWORD ret = ERROR_SUCCESS;
 
    ptr->DhcpEnabled = 0;
    ptr->LeaseObtained = 0;
    ptr->LeaseExpires = 0;
    strcpy(ptr->DhcpServer.IpAddress.String, "");
 
    ifname = getInterfaceNameByIndex(AdapterIndex);
    if (!ifname)
        return ERROR_OUTOFMEMORY;
 
    ret = RegOpenKeyExW(HKEY_LOCAL_MACHINE,
                        L"SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces",
                        0,
                        KEY_READ,
                        &hKeyInterfaces);
    if (ret != ERROR_SUCCESS)
        goto done;
 
    ret = RegOpenKeyExA(hKeyInterfaces,
                        ifname,
                        0,
                        KEY_READ,
                        &hKeyInterface);
    if (ret != ERROR_SUCCESS)
        goto done;
 
    dwSize = sizeof(ptr->DhcpEnabled);
    ret = RegQueryValueExW(hKeyInterface,
                           L"EnableDHCP",
                           NULL,
                           &dwType,
                           (PBYTE)&ptr->DhcpEnabled,
                           &dwSize);
    if (ret != ERROR_SUCCESS)
        ptr->DhcpEnabled = 0;
 
    if (ptr->DhcpEnabled != 0)
    {
        dwSize = sizeof(ptr->LeaseObtained);
        ret = RegQueryValueExW(hKeyInterface,
                               L"LeaseObtainedTime",
                               NULL,
                               &dwType,
                               (PBYTE)&dwValue,
                               &dwSize);
        if (ret == ERROR_SUCCESS)
            ptr->LeaseObtained = (time_t)dwValue;
 
        dwSize = sizeof(dwValue);
        ret = RegQueryValueExW(hKeyInterface,
                               L"LeaseTerminatesTime",
                               NULL,
                               &dwType,
                               (PBYTE)&dwValue,
                               &dwSize);
        if (ret == ERROR_SUCCESS)
            ptr->LeaseExpires = (time_t)dwValue;
 
        dwSize = sizeof(ptr->DhcpServer.IpAddress.String);
        ret = RegQueryValueExA(hKeyInterface,
                               "DhcpServer",
                               NULL,
                               &dwType,
                               (PBYTE)&ptr->DhcpServer.IpAddress.String,
                               &dwSize);
        if (ret != ERROR_SUCCESS)
            strcpy(ptr->DhcpServer.IpAddress.String, "");
    }
    ret = ERROR_SUCCESS;
 
done:
    if (hKeyInterface)
        RegCloseKey(hKeyInterface);
 
    if (hKeyInterfaces)
        RegCloseKey(hKeyInterfaces);
 
    if (ifname)
        consumeInterfaceName(ifname);
 
    return ret;
}

Referenced by GetAdaptersInfo().