c++ - 通过 C++ 更改我的动态 IP 地址

Question

我有一个动态 IP 地址，实际上我可以从我的路由器页面 (http://192.168.1.1) 更改它，点击释放然后更新。

我可以通过 curl 向 http://192.168.1.1 发出 http 请求页面，但这只能解决我使用该路由器的计算机上的问题。

所以我很想知道是否有一种方法可以在不通过路由器页面 (192.168.1.1) 的情况下通过 C++ 更新我的 IP。

我也从命令行尝试过，但没有得到肯定的结果。我试过的代码如下:

ipconfig /release

ipconfig /renew

我也试过这段代码:

#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif

#include "stdafx.h"
#include <winsock2.h>
#include <iphlpapi.h>
#include <stdio.h>
#include <iostream> 

#pragma comment(lib, "iphlpapi.lib")

#define MALLOC(x) HeapAlloc(GetProcessHeap(), 0, (x)) 
#define FREE(x) HeapFree(GetProcessHeap(), 0, (x))

// Before calling IpReleaseAddress and IpRenewAddress we use
// GetInterfaceInfo to retrieve a handle to the adapter

void __cdecl main()
{
    ULONG ulOutBufLen = 0;
    DWORD dwRetVal = 0;
    PIP_INTERFACE_INFO pInfo;

    pInfo = (IP_INTERFACE_INFO *)MALLOC(sizeof(IP_INTERFACE_INFO));

    // Make an initial call to GetInterfaceInfo to get
    // the necessary size into the ulOutBufLen variable
    if (GetInterfaceInfo(pInfo, &ulOutBufLen) == ERROR_INSUFFICIENT_BUFFER) {
        FREE(pInfo);
        pInfo = (IP_INTERFACE_INFO *)MALLOC(ulOutBufLen);
    }

    // Make a second call to GetInterfaceInfo to get the
    // actual data we want
    if ((dwRetVal = GetInterfaceInfo(pInfo, &ulOutBufLen)) == NO_ERROR) {
        printf("\tAdapter Name: %ws\n", pInfo->Adapter[0].Name);
        printf("\tAdapter Index: %ld\n", pInfo->Adapter[0].Index);
        printf("\tNum Adapters: %ld\n", pInfo->NumAdapters);
    }
    else if (dwRetVal == ERROR_NO_DATA) {
        printf("There are no network adapters with IPv4 enabled on the local system\n");
        return;
    }
    else {
        LPVOID lpMsgBuf;
        printf("GetInterfaceInfo failed.\n");

        if (FormatMessage(
            FORMAT_MESSAGE_ALLOCATE_BUFFER |
            FORMAT_MESSAGE_FROM_SYSTEM |
            FORMAT_MESSAGE_IGNORE_INSERTS,
            NULL,
            dwRetVal,
            MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
            (LPTSTR)&lpMsgBuf,
            0,
            NULL)) {
            printf("\tError: %s", lpMsgBuf);
        }
        LocalFree(lpMsgBuf);
        return;
    }

    // Call IpReleaseAddress and IpRenewAddress to release and renew
    // the IP address on the first network adapter returned 
    // by the call to GetInterfaceInfo.
    if ((dwRetVal = IpReleaseAddress(&pInfo->Adapter[0])) == NO_ERROR) {
        printf("IP release succeeded.\n");
    }
    else {
        printf("IP release failed: %ld\n", dwRetVal);
    }

    if ((dwRetVal = IpRenewAddress(&pInfo->Adapter[0])) == NO_ERROR) {
        printf("IP renew succeeded.\n");
    }
    else {
        printf("IP renew failed: %ld\n", dwRetVal);
    }

    // Free memory for IP_INTERFACE_INFO 
    if (pInfo != NULL) {
        FREE(pInfo);
    }
    std::cout << ("\n Processo terminato\n");
    std::system("PAUSE");

    return;
}

我已经启用了 DHCP 服务器并设置了这些值:DHCP 服务状态DHCP 状态:已启用IP 初始化 DHCP:192.168.1.2IP 结局 DHCP(Riservato per uso interno):192.168.1.254

我需要在 Windows XP 和 Windows 7 平台上运行我的程序。

谢谢你的帮助

Answer 1

IP Helper 函数包括 IPReleaseAddress和 IPRenewAddress正是为了做到这一点。

不过，您需要先枚举网络适配器，然后将正确的适配器 ID 传递给函数以执行此操作。你通常用 GetInterfaceInfo 来做到这一点.