c++ - GetAdaptersAddresses() を使用して IP アドレスを送信する方法

Question

サーバーがIPアドレスをWebホストに送信するTCPを使用して、C ++でサーバーとクライアントプログラムを作成しようとしています。クライアントはWebホストにアクセスしてサーバーのリストを取得できます。GetAdaptersAddresses() 関数を使用してサーバーの IP アドレスを送信しようとしていますが、関数のしくみがよくわかりません。5 つのパラメーターが必要であることはわかっていますが、それらにどのような値を設定すればよいかわかりません。

すべてのサーバーコードは次のとおりです。

    #define WEBSITE         "server.x10host.com"    // Full website URL, withouth HTTP (raises exe size)
#define WEBPAGE         "/Server.php"               // The page of the Server Script (proceed with '\')


#define cAddIP          0       // Send this to the server, to add the IP to the list.
#define cRemIP          1       // Send this to the server, to remove the IP from the list.
#define cGetIPs         2       // Send this to the server, to get the list of all IPs.


SOCKET ListeningSocket;
SOCKADDR_IN ServerAddr;

int Port = 7171;
int MyIP;                       // Hold's the computers external IP (EG on an NAT)

// -------------------------




char* WebPost(char Website[], char Webpage[], char Request[], int RetLen) {
    // Sends an HTTP Post request with POST Data...
    // Absolutly NOT error checking, which needs fixing!

    SOCKET WebSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

    struct hostent *WebHost;
    WebHost = gethostbyname(Website);
    if (WebHost == NULL) {

        if (WSAGetLastError() == WSANOTINITIALISED)
            printf("Error Not Connected!");
        else
            printf("Error: %d", WSAGetLastError());

        Sleep(1000);
        exit(0);

    }
    SOCKADDR_IN SockAddr;
    SockAddr.sin_port   = htons(80);
    SockAddr.sin_family = AF_INET;

    SockAddr.sin_addr.s_addr = *((unsigned long*)WebHost->h_addr);
    connect(WebSocket, (SOCKADDR*)(&SockAddr), sizeof(SockAddr));


    char PostRequest[1024];

    sprintf(PostRequest,
        "POST %s HTTP/1.1\r\n"
        "Host: %s\r\n"
        "Content-Length: %hu\r\n"
        "Content-Type: application/x-www-form-urlencoded\r\n"
        "\r\nD=%s\0",
        Webpage, Website,
        strlen(Request)+2, Request
    );

    send(WebSocket, PostRequest, strlen(PostRequest), 0);


    // Get return data ----------

    char* Data = new char[RetLen];
    recv(WebSocket, Data, 4, 0);

    for (;;) {                          // Skip HTTP headers...

        Data[0] = Data[1];
        Data[1] = Data[2];
        Data[2] = Data[3];

        recv(WebSocket, &Data[3], 1, 0);

        if (Data[0] == '\r' && Data[1] == '\n'
        &&  Data[2] == '\r' && Data[3] == '\n')
            break;

    }

    int DataLen = recv(WebSocket, Data, RetLen, 0);
    Data[DataLen] = '\0';   // Return the data...

    shutdown(WebSocket, 2);
    closesocket(WebSocket);
    return Data;

}



void ServStart() {

    WSADATA wsaData; 

    if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) {
        printf("Server: WSAStartup failed with error %ld.\n", WSAGetLastError());
        exit(0);
    }

    printf("Server: The Winsock DLL found!\n");
    printf("Server: The current status is %s.\n\n", wsaData.szSystemStatus);

    if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2 ) {
        printf("Server: The dll do not support the Winsock version %u.%u!\n", LOBYTE(wsaData.wVersion),HIBYTE(wsaData.wVersion));
        WSACleanup();
        exit(0);
    }

    printf("Server: The dll supports the Winsock version %u.%u!\n", LOBYTE(wsaData.wVersion),HIBYTE(wsaData.wVersion));


    // Start listening -----------------------------------------------
    ListeningSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

    if (ListeningSocket == INVALID_SOCKET) {
        printf("Server: Error at socket, error code: %ld.\n", WSAGetLastError());
        WSACleanup();
        exit(0);
    }

    ServerAddr.sin_family = AF_INET;
    ServerAddr.sin_port = htons(Port);
    ServerAddr.sin_addr.s_addr = htonl(INADDR_ANY);

    if (bind(ListeningSocket, (SOCKADDR *)&ServerAddr, sizeof(ServerAddr)) == SOCKET_ERROR) {
        printf("Server: bind failed! Error code: %ld.\n", WSAGetLastError());
        closesocket(ListeningSocket);
        WSACleanup();
        exit(0);
    }

    if (listen(ListeningSocket, 5) == SOCKET_ERROR) {
        printf("Server: listen: Error listening on socket %ld.\n", WSAGetLastError());
        closesocket(ListeningSocket);
        WSACleanup();
        exit(0);
    }

    char SendBuf[32];
    MyIP = GetAdaptersAddresses();      // Get my IP
    sprintf(SendBuf, "%hhu|%s", cAddIP, MyIP);              // Send the server the IP
    WebPost(WEBSITE, WEBPAGE, SendBuf, 0);

    printf("Server: listening for connections...\n\n");

}

void ShutDown() {               // Shut down the server (tells the web server I am offline)

    char SendBuf[32];           // Remove my IP from the list of online servers...
    sprintf(SendBuf, "%hhu|%s", cRemIP, MyIP);
    WebPost(WEBSITE, WEBPAGE, SendBuf, 0);

    printf("Successful shutdown\n");
    Sleep(1000);

    WSACleanup();

}

誰かがこの関数のコードを手伝ってくれませんか? ありがとう

Answer 1

MyIPをに設定するだけで動作するようになりましたMyIP = inet_ntoa(addr);