尝试连接winsock时出现错误10061

在客户端：

1. 在呼叫CCD_ 2之前不要呼叫WSACleanup()
2. 您没有对getaddrinfo()进行任何错误处理
3. 您没有将ai_flags设置为与您的输入值相匹配（如AI_NUMERICHOST）
4. 您没有释放getaddrinfo()返回的内存
5. 您没有考虑指定AF_UNSPEC到getaddrinfo()，因此它可能会返回多个地址。您应该尝试连接到所有这些，直到其中一个成功为止

试试这个：

void Base::Connect(string ip, string port)
{
    int status, error;
    SOCKET ConnectSocket = INVALID_SOCKET;
    struct addrinfo hints = {0};
    struct addrinfo *servinfo;  // will point to the results
    hints.ai_family = AF_UNSPEC;     // don't care IPv4 or IPv6
    hints.ai_socktype = SOCK_STREAM; // TCP stream sockets
    hints.ai_flags = AI_NUMERICHOST; // parse an IP address
    //hints.ai_flags |= AI_NUMERICSERV; // parse a port number (not supported on Windows)
    // get ready to connect
    status = getaddrinfo(ip.c_str(), port.c_str(), &hints, &servinfo);
    if (status != 0)
    {
        printf("getaddrinfo error: (%d) %sn", status, gai_strerror(status));
        return;
    }
    addrinfo *addr = servinfo;
    do
    {
        // Socket Setup
        ConnectSocket = socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol);
        if (ConnectSocket == INVALID_SOCKET)
        {
            printf("socket error: %dn", WSAGetLastError());
        }
        else
        {
            // Connect
            if (connect(ConnectSocket, addr->ai_addr, addr->ai_addrlen) != SOCKET_ERROR)
            {
                printf("connected to servern");
                break;
            }
            printf("connect error: %dn", WSAGetLastError());
            closesocket(ConnectSocket);
            ConnectSocket = INVALID_SOCKET;
        }
        addr = addr->ai_next;
    }
    while (addr != NULL);
    freeaddrinfo(servinfo);
    if (ConnectSocket == INVALID_SOCKET)
        printf("unable to connect to servern");
}

在服务器端：

1. 您没有对socket()、bind()或listen()进行任何错误处理
2. 调用bind()之前必须启用SO_REUSEADDR，而不是之后。而且你甚至没有正确地启用它
3. 您没有释放getaddrinfo()返回的内存

试试这个：

int _tmain(int argc, _TCHAR* argv[])
{
    // WINDOWS SETUP
    WSAData wsaData;
    if (WSAStartup(MAKEWORD(2, 0), &wsaData) != 0) 
    {
        fprintf(stderr, "WSAStartup failed.n");
        exit(1);
    }
    // PREPARE TO LAUNCH
    int status;
    struct sockaddr_storage their_addr;
    socklen_t addr_size;
    SOCKET client;
    struct addrinfo hints = {0};
    struct addrinfo *servinfo;  // will point to the results
    hints.ai_family = AF_UNSPEC;     // don't care IPv4 or IPv6
    hints.ai_socktype = SOCK_STREAM; // TCP stream sockets
    hints.ai_flags = AI_PASSIVE;     // fill in my IP for me
    //hints.ai_flags |= AI_NUMERICSERV; // parse a port number (not supported on Windows)
    status = getaddrinfo(NULL, "80", &hints, &servinfo);
    if (status != 0) 
    {
        fprintf(stderr, "getaddrinfo error: (%d) %sn", status, gai_strerror(status));
        getchar();
        exit(1);
    }
    // optional, loop through servinfo creating a separate
    // listening socket for each address reported...
    // GET THE FILE DESCRIPTOR  
    SOCKET mSocket = socket(servinfo->ai_family, servinfo->ai_socktype, servinfo->ai_protocol);
    if (mSocket == INVALID_SOCKET)
    {
        fprintf(stderr, "socket error: %dn", WSAGetLastError());
        freeaddrinfo(servinfo);
        closesocket(mSocket);
        getchar();
        exit(1);
    }
    // lose the pesky "Address already in use" error message
    BOOL yes = TRUE;
    if (setsockopt(mSocket, SOL_SOCKET, SO_REUSEADDR, (char*)&yes, sizeof(yes)) == SOCKET_ERROR)
    {
        fprintf(stderr, "setsockopt error: %dn", WSAGetLastError());
        freeaddrinfo(servinfo);
        closesocket(mSocket);
        getchar();
        exit(1);
    }
    // WHAT PORT AM I ON
    if (bind(mSocket, servinfo->ai_addr, servinfo->ai_addrlen) == SOCKET_ERROR)
    {
        fprintf(stderr, "bind error: %dn", WSAGetLastError());
        freeaddrinfo(servinfo);
        closesocket(mSocket);
        getchar();
        exit(1);
    }
    freeaddrinfo(servinfo);
    int backlog = 2;
    if (listen(mSocket, backlog) == SOCKET_ERROR)
    {
        fprintf(stderr, "listen error: %dn", WSAGetLastError());
        closesocket(mSocket);
        getchar();
        exit(1);
    }
    // SERVER STARTED LISTENING SUCCESFULLY
    printf("Server is listening...n");
    // ACCEPT
    addr_size = sizeof their_addr;
    client = accept(mSocket, (struct sockaddr*)&their_addr, &addr_size);
    if (client == INVALID_SOCKET)
    {
        fprintf(stderr, "accept error: %dn", WSAGetLastError());
    }
    else
    {
        char ip[NI_MAXHOST] = {0};
        char port[NI_MAXSERV] = {0};
        status = getnameinfo((struct sockaddr*)&their_addr, addr_size, ip, NI_MAXHOST, port, NI_MAXSERV, NI_NUMERICHOST | NI_NUMERICSERV);
        if (status == 0)
            printf("Client connected from %s:%sn", ip, port);
        else
            printf("Client connected. getnameinfo error: (%d) %sn", status, gai_strerror(status));
        //...
        closesocket(client);
    }        
    closesocket(mSocket);
    printf("Server ended");
    getchar();
    return 0;
}