通过winapi创建虚拟网口并分配虚拟ip

要创建虚拟网口并分配虚拟IP，可以使用WinAPI中的以下函数：

1. CreateInterface函数，用于创建虚拟网络接口。
2. SetIpInterfaceEntry函数，用于设置虚拟网口的IP地址。

以下是一个示例代码，可以帮助你创建虚拟网口并分配虚拟IP：

#include <winsock2.h>
#include <iphlpapi.h>
#include <ws2tcpip.h>
#include <stdio.h>

#pragma comment(lib, "iphlpapi.lib")
#pragma comment(lib, "ws2_32.lib")

int main(int argc, char* argv[])
{
    WCHAR adapterName[MAX_ADAPTER_NAME_LENGTH];
    GUID adapterGuid;
    PIP_ADAPTER_ADDRESSES adapterAddresses = NULL;
    PIP_ADAPTER_ADDRESSES adapter = NULL;
    ULONG adapterAddressesLength = 0;
    DWORD result = 0;

    // 获取网络接口列表长度
    result = GetAdaptersAddresses(AF_UNSPEC, GAA_FLAG_INCLUDE_PREFIX, NULL, adapterAddresses, &adapterAddressesLength);

    if (result == ERROR_BUFFER_OVERFLOW)
    {
        // 分配内存
        adapterAddresses = (PIP_ADAPTER_ADDRESSES)malloc(adapterAddressesLength);

        // 重新获取网络接口列表
        result = GetAdaptersAddresses(AF_UNSPEC, GAA_FLAG_INCLUDE_PREFIX, NULL, adapterAddresses, &adapterAddressesLength);

        if (result != NO_ERROR)
        {
            printf("GetAdaptersAddresses failed with error: %lu\n", result);
            return -1;
        }
    }
    else
    {
        printf("GetAdaptersAddresses failed with error: %lu\n", result);
        return -1;
    }

    // 遍历网络接口列表
    for (adapter = adapterAddresses; adapter != NULL; adapter = adapter->Next)
    {
        // 找到第一个物理网络接口
        if (adapter->IfType == IF_TYPE_ETHERNET_CSMACD && adapter->OperStatus == IfOperStatusUp)
        {
            wcscpy_s(adapterName, MAX_ADAPTER_NAME_LENGTH, adapter->AdapterName);
            adapterGuid = adapter->AdapterGuid;
            break;
        }
    }

    if (adapter == NULL)
    {
        printf("No physical network adapter found.\n");
        return -1;
    }

    // 创建虚拟网络接口
    NET_LUID adapterLuid = { 0 };
    result = ConvertInterfaceGuidToLuid(&adapterGuid, &adapterLuid);

    if (result != NO_ERROR)
    {
        printf("ConvertInterfaceGuidToLuid failed with error: %lu\n", result);
        return -1;
    }

    MIB_IF_ROW2 interfaceRow = { 0 };
    interfaceRow.InterfaceLuid = adapterLuid;
    interfaceRow.InterfaceType = IF_TYPE_SOFTWARE_LOOPBACK;
    interfaceRow.InterfaceAndOperStatusFlags.HardwareInterface = FALSE;
    interfaceRow.InterfaceAndOperStatusFlags.OperStatus = IF_OPER_STATUS_UP;
    wcscpy_s(interfaceRow.Alias, IF_MAX_STRING_SIZE, L"MyVirtualAdapter");

    result = CreateIfEntry2(&interfaceRow);

    if (result != NO_ERROR)
    {
        printf("CreateIfEntry2 failed with error: %lu\n", result);
        return -1;
    }

    // 设置虚拟网口的IP地址
    MIB_IPINTERFACE_ROW ipInterfaceRow = { 0 };
    ipInterfaceRow.InterfaceLuid = adapterLuid;
    ipInterfaceRow.Family = AF_INET;
    InetPton(AF_INET, "192.168.100.2", &(ipInterfaceRow.InterfaceLuid));

    result = SetIpInterfaceEntry(&ipInterfaceRow);

    if (result != NO_ERROR)
    {
        printf("SetIpInterfaceEntry failed with error: %lu\n", result);
        return -1;
    }

    printf("Virtual network adapter created successfully.\n");

    return 0;
}

这个示例代码中，我们首先使用GetAdaptersAddresses函数获取网络接口列表，然后找到第一个物理网络接口。接着，我们使用CreateIfEntry2函数创建虚拟网络接口，并使用SetIpInterfaceEntry函数设置虚拟网口的IP地址。注意，IP地址必须是未被使用的，否则会失败。

希望这个示例代码能够帮助你创建虚拟网口并分配虚拟IP。