Question

我正在尝试将我的IRC bot从Python移植到C ++，我遇到了Winsock2的一些问题。我对C / C ++中的套接字相当新，而且大部分代码都是从各种教程中拼凑而成的。我一直收到错误10049而且我不知所措。任何帮助将非常感激。谢谢！

port_设置为6667，host_为“irc.rizon.net”

WSADATA wsaData;
int starterr = WSAStartup(MAKEWORD(2,2), &wsaData);
if (starterr != 0) {
    std::cout << "Error: " << WSAGetLastError() << " occurred!" << std::endl;
    WSACleanup();
    return 1;
}
std::cout << "WSAStartup Successful!" << std::endl;
socketfd_ = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
if (socketfd_ == INVALID_SOCKET) {
    std::cout << "Error: " << WSAGetLastError() << " occurred!" << std::endl;
    WSACleanup();
    return 1;
}
std::cout << "Socket Creation Successful!" << std::endl;

sockaddr_in anews;
anews.sin_port = htons(port_);
anews.sin_addr.s_addr = inet_addr(host_.c_str());
anews.sin_family = AF_INET;
if (connect(socketfd_,(sockaddr*)&anews, sizeof(anews)) == SOCKET_ERROR) {
    std::cout << "Error: " << WSAGetLastError() << " occurred!" << std::endl;
    WSACleanup();
    return 1;
}
std::cout << "Socket has connected successfuly!" << std::endl;
return 0;

Answer 1

inet_addr()采用“x.x.x.x”形式的虚线IP地址，并将主机名传递给它。

您可以使用gethostbyname()：

hostent* host;
char* ip;

...

// Get the local host information
host= gethostbyname(host_.c_str());
ip= inet_ntoa(*(struct in_addr *)*host->h_addr_list);

sockaddr_in anews;
anews.sin_port = htons(port_);
anews.sin_addr.s_addr = inet_addr(ip);
anews.sin_family = AF_INET;

...

或者更简单的方法是使用getaddrinfo（）：

struct addrinfo *ai;

if(getaddrinfo(host_.c_str(), "6667", NULL, &ai) != 0)
    return 1;

socketfd_ = socket(ai->ai_family, SOCK_STREAM, 0);
if (socketfd_ == INVALID_SOCKET) {
    freeaddrinfo(ai);
    return 1
}

if (connect(socketfd_, ai->ai_addr, (int)ai->ai_addrlen) == SOCKET_ERROR) {
    closesocket(socketfd_);
    freeaddrinfo(ai);
    return 1;
}

...

VC ++ Winsock2错误10049.尝试构建IRC bot

1 个答案: