[英]Socket Creation Compile Error using Winsock2 in c++
EDIT : 编辑:
#undef UNICODE
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
#include <WinSock2.h>
#include <WS2tcpip.h>
#include <iostream>
#include <string>
#include <thread>
#pragma comment (lib, "Ws2_32.lib")
#define DEFAULT_BUFLEN 512
#define DEFAULT_PORT "1016"
//Globals
struct addrinfo *result = NULL;
struct addrinfo hints;
//Prototypes
int listenFunction();
int acceptFunction(SOCKET ListenSocket);
I recently started recoding a tchat server that I never got to work in order to make a cleaner code but I ran in to an error that kinda confused me. 我最近开始重新编码无法正常工作的tchat服务器,以编写更清晰的代码,但遇到一个令我感到困惑的错误。 I know how to fix this but I would like to know why it is doing this. 我知道如何解决此问题,但我想知道为什么要这样做。 So basically, I have two functions, my main function : 所以基本上,我有两个功能,主要功能是:
int main()
{
int iResult;
std::cout << "At the begginning of main." << std::endl;
WSADATA wsaData;
//Initialize winsock
std::cout << "Initializing winsock..." << std::endl;
iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (iResult != 0)
{
std::cout << "WSAStartup failed." << std::endl;
return 1;
}
std::cout << "Sucess" << std::endl;
ZeroMemory(&hints, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_PASSIVE;
std::cout << "Going into listenFunction()" << std::endl;
listenFunction();
return 0;
}
And my listenFunction : 和我的listenFunction:
int listenFunction()
{
int iResult;
std::cout << "In Listening function" << std::endl;
SOCKET ListenSocket = INVALID_SOCKET;
std::cout << "Calling addrinfo()" << std::endl;
iResult = getaddrinfo(NULL, DEFAULT_PORT, &hints, &result);
if (iResult != 0){
std::cout << "getaddrinfo() failed with error code : " << std::endl;
WSACleanup();
return -1;
}
//Create a SOCKET for connecting to the server
std::cout << "Creating ListenSocket..." << std::endl;
ListenSocket = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
if (ListenSocket == INVALID_SOCKET) {
std::cout << "Socket failed with error : " << WSAGetLastError() << std::endl;
freeaddrinfo(result);
WSACleanup();
return -1;
}
//Maybe setsockopt function here if bug
//Setup the TCP listening socket
std::cout << "Setting up the TCP listening socket..." << std::endl;
iResult = bind(ListenSocket, result->ai_addr, (int)result->ai_addrlen);
if (iResult == SOCKET_ERROR) {
std::cout << "Bind failed with error : " << WSAGetLastError() << std::endl;
freeaddrinfo(result);
closesocket(ListenSocket);
WSACleanup();
return -1;
}
freeaddrinfo(result);
std::cout << "Listening on ListenSocket..." << std::endl;
//Listening
iResult = listen(ListenSocket, SOMAXCONN);
if (iResult == SOCKET_ERROR){
std::cout << "Listen failed with error : " << WSAGetLastError() << std::endl;
closesocket(ListenSocket);
WSACleanup();
return -1;
}
std::thread AcceptThread{ acceptFunction(ListenSocket) };
return 0;
}
Bsically, when I declare the socket in the listenFunction, I get this error : 基本上,当我在listenFunction中声明套接字时,出现此错误:
Error 1 error C2064: term does not evaluate to a function taking 0 arguments
Where as if I copy that same exact line and paste it in the main function, I don't get that error anymore (of course I get all the errors in the listenFunction because its not declared). 仿佛我复制了同一行并将其粘贴到main函数中一样,我不再收到该错误(当然,由于未声明它,所以我在listenFunction中得到了所有错误)。 Is there anyway to fix this rather than passing it in an argument ? 无论如何,有没有解决这个问题而不是将其传递给参数?
Any help is greatly appreciated, 任何帮助是极大的赞赏,
mindoo 心智
The error you list is not caused by creating the socket, its caused by the line: 您列出的错误不是由创建套接字引起的,而是由以下行引起的:
std::thread AcceptThread{ acceptFunction(ListenSocket) };
I'm not sure what you are trying to do there, as I am unfamiliar with how curly braces would be used to initialize a std::thread
. 我不确定您要在其中做什么,因为我不知道如何使用花括号初始化std::thread
。 Maybe an attempt at a Lambda? 也许尝试Lambda?
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.