以编程方式确定IP地址是通过dhcp分配还是在Java中手动设置 [英] Programmatically determine if ip address is assigned via dhcp or manually set in Java

问题描述

是否可以发现本地网络接口的地址是否通过DHCP分配，还是通过Java静态设置?

Is there any way to discover if a local network interface has it's address assigned via DHCP or if it is statically set through Java?

推荐答案

因此，仅当您请求Win NT'solution'时，这是我的代码.它列出了具有当前配置值的网络接口.

So, as you requested Win NT 'solution' only, here is my code.It lists network interfaces with current configured values.

请注意EnableDHCP注册表项值，我认为这很重要.

Note EnableDHCP registry key value, I think this is the point.

正如我在您的问题下的评论中已经提到的，您需要最少简单的JNI包装器.

As I already mentioned in comment under your question, you need as least simple JNI wrapper.

希望这会有所帮助.

更多信息在这里: http://support.microsoft.com/kb/314053

#include <windows.h>

#define NETCARD_ROOT    L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\NetworkCards"
#define TCPIP_ROOT  L"SYSTEM\\CurrentControlSet\\services\\Tcpip\\Parameters\\Interfaces"

int _tmain(int argc, _TCHAR* argv[])
{

    //First enumerate all network adapters

    HKEY hNetCardsKey;
    LSTATUS lStatus = ERROR_SUCCESS;

    lStatus = RegOpenKey(HKEY_LOCAL_MACHINE, 
        NETCARD_ROOT, 
        &hNetCardsKey);

    if(ERROR_SUCCESS == lStatus)
    {
        DWORD dwCards = 0L;
        DWORD dwMaxSubkeyNameLen = 0L;
        lStatus = RegQueryInfoKey(hNetCardsKey, NULL, NULL, NULL, &dwCards, 
            &dwMaxSubkeyNameLen, NULL, NULL, NULL, NULL, NULL, NULL);

        if(ERROR_SUCCESS == lStatus && dwCards)
        {
            for(DWORD i = 0; i < dwCards; i++)
            {
                TCHAR wszCurrentCardIdxName[MAX_PATH];
                wszCurrentCardIdxName[0] = '\0';
                lStatus = RegEnumKey(hNetCardsKey, i, 
                    wszCurrentCardIdxName, MAX_PATH);

                if(ERROR_SUCCESS == lStatus)
                {
                    TCHAR wszAdapterKeyName[MAX_PATH];
                    wszAdapterKeyName[0] = '\0';

                    wsprintf(wszAdapterKeyName, L"%s\\%s", NETCARD_ROOT, 
                        wszCurrentCardIdxName);

                    HKEY hCardNameKey;

                    lStatus = RegOpenKey(
                        HKEY_LOCAL_MACHINE, 
                        wszAdapterKeyName, 
                        &hCardNameKey);

                    if(ERROR_SUCCESS == lStatus)
                    {
                        TCHAR wszServiceNameGuid[MAX_PATH];
                        TCHAR wszAdapterName[MAX_PATH];

                        DWORD dwSize = sizeof(wszServiceNameGuid);
                        wszServiceNameGuid[0] = '\0';
                        RegQueryValueEx(
                            hCardNameKey, 
                            L"ServiceName",
                            NULL, 
                            NULL,
                            (LPBYTE)wszServiceNameGuid,
                            &dwSize);

                        dwSize = sizeof(wszAdapterName);
                        RegQueryValueEx(
                            hCardNameKey, 
                            L"Description",
                            NULL, 
                            NULL,
                            (LPBYTE)wszAdapterName,
                            &dwSize);

                        OutputDebugStringW(wszServiceNameGuid);
                        OutputDebugStringW(L"\n");

                        RegCloseKey(hCardNameKey);

                        //Get parameters
                        TCHAR wszCardParamKey[MAX_PATH];
                        wszCardParamKey[0] = '\0';
                        wsprintf(wszCardParamKey,L"%s\\%s", TCPIP_ROOT, wszServiceNameGuid);

                        HKEY hParamKey = NULL;

                        lStatus = RegOpenKey(
                            HKEY_LOCAL_MACHINE, 
                            wszCardParamKey, 
                            &hParamKey);

                        if(ERROR_SUCCESS == lStatus)
                        {
                            DWORD dwEnabledDHCP = 0L;
                            DWORD dwDWSize = sizeof(DWORD);
                            TCHAR wszStaticIP[32];
                            TCHAR wszDHCPIP[32];
                            DWORD dwIPSize = sizeof(wszDHCPIP);

                            ZeroMemory(wszDHCPIP, dwIPSize);
                            ZeroMemory(wszStaticIP, dwIPSize);

                            lStatus = RegQueryValueEx(
                                hParamKey, 
                                L"EnableDHCP", 
                                NULL, NULL, 
                                (LPBYTE)&dwEnabledDHCP, 
                                &dwDWSize);

                            if(SUCCEEDED(lStatus))
                            {
                                wprintf_s(L"Adapter : %s [%s] \n\tDHCP : %s\n", 
                                    wszServiceNameGuid, 
                                    wszAdapterName,
                                    dwEnabledDHCP 
                                    ? L"Yes" : L"No");
                            }

                            lStatus = RegQueryValueEx(
                                hParamKey, 
                                L"IPAddress", 
                                NULL, 
                                NULL, 
                                (LPBYTE)&wszStaticIP, 
                                &dwIPSize);

                            if(SUCCEEDED(lStatus))
                            {
                                wprintf_s(L"\tConfigured IP Address : %s\n", wszStaticIP);
                            }

                            dwIPSize = sizeof(wszDHCPIP);
                            lStatus = RegQueryValueEx(
                                hParamKey, 
                                L"DhcpIPAddress", 
                                NULL, 
                                NULL, 
                                (LPBYTE)&wszDHCPIP, 
                                &dwIPSize);

                            if(SUCCEEDED(lStatus))
                            {
                                wprintf_s(L"\tDHCP IP Address : %s\n", wszDHCPIP);
                            }

                            wprintf_s(L"\n");

                            RegCloseKey(hParamKey);
                        }

                    }
                }
            }
        }


        RegCloseKey(hNetCardsKey);
    }


    return 0;
}

简单输出:

Adapter : {6EC2554F-3359-43A2-AADB-57F427DC72FC} [Marvell Yukon 88E8072 PCI-E Gigabit Ethernet Controller]
        DHCP : No
        Configured IP Address : 192.168.5.10
        DHCP IP Address : 192.168.1.102

Adapter : {2A28BDA8-ED1D-4E6E-8990-485EE1836828} [Sony Ericsson Device 0016 USB Ethernet Emulation (NDIS 5)]
        DHCP : Yes
        Configured IP Address :
        DHCP IP Address : 0.0.0.0

Adapter : {491DC095-155F-4572-B975-2E1703C17632} [Microsoft Windows Mobile Remote Adapter]
        DHCP : Yes
        Configured IP Address :
        DHCP IP Address : 169.254.2.2

Adapter : {5F987E64-E804-42DA-9453-8E479B6FC835} [Broadcom 802.11b/g Network adapter]
        DHCP : Yes
        Configured IP Address :
        DHCP IP Address : 192.168.1.14

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