I am trying to build a C++ webserver project using MingW in windows visual studio code. Because I am new to C++, I am learning using VSCODE, the project structure is not so clear with multiple files. is it the file references which I should look out for in this instance or is there a file am missing?
This is the error
> Executing task: C/C++: g++.exe build active file <
Starting build...
C:\msys64\mingw64\bin\g++.exe -fdiagnostics-color=always -g C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles\TcpListener.cpp -o C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles\TcpListener.exe
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\AppData\Local\Temp\ccVz58F5.o: in function `TcpListener::init()':
C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:12: undefined reference to `__imp_WSAStartup'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:19: undefined reference to `__imp_socket'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:22: undefined reference to `__imp_WSAGetLastError'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:28: undefined reference to `__imp_htons'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:29: undefined reference to `__imp_inet_pton'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:31: undefined reference to `__imp_bind'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:33: undefined reference to `__imp_WSAGetLastError'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:37: undefined reference to `__imp_listen'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:39: undefined reference to `__imp_WSAGetLastError'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\AppData\Local\Temp\ccVz58F5.o: in function `TcpListener::run()':
C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:76: undefined reference to `__imp_select'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:88: undefined reference to `__imp_accept'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:101: undefined reference to `__imp_recv'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:107: undefined reference to `__imp_closesocket'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:151: undefined reference to `__imp_closesocket'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:166: undefined reference to `__imp_closesocket'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:170: undefined reference to `__imp_WSACleanup'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:\Users\Admin\AppData\Local\Temp\ccVz58F5.o: in function `TcpListener::sendToClient(int, char const*, int)':
C:\Users\Admin\Desktop\Projects\WebServer\SourceFiles/TcpListener.cpp:177: undefined reference to `__imp_send'
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/lib/../lib/libmingw32.a(lib64_libmingw32_a-crt0_c.o): in function `main':
C:/M/mingw-w64-crt-git/src/mingw-w64/mingw-w64-crt/crt/crt0_c.c:18: undefined reference to `WinMain'
collect2.exe: error: ld returned 1 exit status
Build finished with error(s).
Terminal will be reused by tasks, press any key to close it.
and this is my project structure project structure
and my TTcpListener.cpp
#include "../HeaderFiles/TcpListener.h"
#include <iostream>
#include <string>
#include <sstream>
int TcpListener::init()
{
// Initialze winsock
WSADATA wsData;
WORD ver = MAKEWORD(2, 2);
int wsOk = WSAStartup(ver, &wsData);
if (wsOk != 0)
{
return wsOk;
}
// Create a socket
m_socket = socket(AF_INET, SOCK_STREAM, 0);
if (m_socket == INVALID_SOCKET)
{
return WSAGetLastError();
}
// Bind the ip address and port to a socket
sockaddr_in hint;
hint.sin_family = AF_INET;
hint.sin_port = htons(m_port);
inet_pton(AF_INET, m_ipAddress, &hint.sin_addr);
if (bind(m_socket, (sockaddr*)&hint, sizeof(hint)) == SOCKET_ERROR)
{
return WSAGetLastError();
}
// Tell Winsock the socket is for listening
if (listen(m_socket, SOMAXCONN) == SOCKET_ERROR)
{
return WSAGetLastError();
}
// Create the master file descriptor set and zero it
FD_ZERO(&m_master);
// Add our first socket that we're interested in interacting with; the listening socket!
// It's important that this socket is added for our server or else we won't 'hear' incoming
// connections
FD_SET(m_socket, &m_master);
return 0;
}
int TcpListener::run()
{
// this will be changed by the \quit command (see below, bonus not in video!)
bool running = true;
while (running)
{
// Make a copy of the master file descriptor set, this is SUPER important because
// the call to select() is _DESTRUCTIVE_. The copy only contains the sockets that
// are accepting inbound connection requests OR messages.
// E.g. You have a server and it's master file descriptor set contains 5 items;
// the listening socket and four clients. When you pass this set into select(),
// only the sockets that are interacting with the server are returned. Let's say
// only one client is sending a message at that time. The contents of 'copy' will
// be one socket. You will have LOST all the other sockets.
// SO MAKE A COPY OF THE MASTER LIST TO PASS INTO select() !!!
fd_set copy = m_master;
// See who's talking to us
int socketCount = select(0, ©, nullptr, nullptr, nullptr);
// Loop through all the current connections / potential connect
for (int i = 0; i < socketCount; i++)
{
// Makes things easy for us doing this assignment
SOCKET sock = copy.fd_array[i];
// Is it an inbound communication?
if (sock == m_socket)
{
// Accept a new connection
SOCKET client = accept(m_socket, nullptr, nullptr);
// Add the new connection to the list of connected clients
FD_SET(client, &m_master);
onClientConnected(client);
}
else // It's an inbound message
{
char buf[4096];
ZeroMemory(buf, 4096);
// Receive message
int bytesIn = recv(sock, buf, 4096, 0);
if (bytesIn <= 0)
{
// Drop the client
onClientDisconnected(sock);
closesocket(sock);
FD_CLR(sock, &m_master);
}
else
{
onMessageReceived(sock, buf, bytesIn);
// Check to see if it's a command. \quit kills the server
// if (buf[0] == '\\')
// {
// // Is the command quit?
// string cmd = string(buf, bytesIn);
// if (cmd == "\\quit")
// {
// running = false;
// break;
// }
// // Unknown command
// continue;
// }
// Send message to other clients, and definiately NOT the listening socket
// for (int i = 0; i < m_master.fd_count; i++)
// {
// SOCKET outSock = m_master.fd_array[i];
// if (outSock != m_socket && outSock != sock)
// {
// // ostringstream ss;
// // ss << "SOCKET #" << sock << ": " << buf << "\r\n";
// // string strOut = ss.str();
// // send(outSock, strOut.c_str(), strOut.size() + 1, 0);
// }
// }
}
}
}
}
// Remove the listening socket from the master file descriptor set and close it
// to prevent anyone else trying to connect.
FD_CLR(m_socket, &m_master);
closesocket(m_socket);
// Message to let users know what's happening.
// string msg = "Server is shutting down. Goodbye\r\n";
while (m_master.fd_count > 0)
{
// Get the socket number
SOCKET sock = m_master.fd_array[0];
// Send the goodbye message
//send(sock, msg.c_str(), msg.size() + 1, 0);
// Remove it from the master file list and close the socket
FD_CLR(sock, &m_master);
closesocket(sock);
}
// Cleanup winsock
WSACleanup();
return 0;
}
// Send a message to a client
void TcpListener::sendToClient(int clientSocket, const char* msg, int length)
{
send(clientSocket, msg, length, 0);
}
// Broadcast a message froma client
void TcpListener::broadcastToClients(int sendingClient, const char* msg, int length)
{
for (int i = 0; i < m_master.fd_count; i++)
{
SOCKET outSock = m_master.fd_array[i];
if (outSock != m_socket && outSock != sendingClient)
{
sendToClient(outSock, msg, length);
}
}
}
void TcpListener::onClientConnected(int clientSocket)
{
}
void TcpListener::onClientDisconnected(int clientSocket)
{
}
void TcpListener::onMessageReceived(int clientSocket, const char* msg, int length)
{
}
Would appreciate any suggestion. Thanks you.
