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#undef UNICODE
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdlib.h>
#include <stdio.h>
#include <iostream>
#include <thread>
// Need to link with Ws2_32.lib
#pragma comment (lib, "Ws2_32.lib")
// #pragma comment (lib, "Mswsock.lib")
//Global values
//I put them as global values in order to get the server up and running.
//I will try to pass them as params later on
int iResult;
struct addrinfo *result = NULL;
struct addrinfo hints;
//Prototypes
int listen(SOCKET ListenSocket, SOCKET ClientSocket);
int accept(SOCKET ListenSocket, SOCKET ClientSocket);
#define DEFAULT_BUFLEN 512
#define DEFAULT_PORT "1016"
int main()
{
std::cout << 1 << std::endl;
WSADATA wsaData;
SOCKET ListenSocket = INVALID_SOCKET;
SOCKET ClientSocket = INVALID_SOCKET;
int iSendResult;
char recvbuf[DEFAULT_BUFLEN];
int recvbuflen = DEFAULT_BUFLEN;
// Initialize Winsock
std::cout << 2 << std::endl;
iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (iResult != 0) {
std::cout << 3 << std::endl;
printf("WSAStartup failed with error: %d\n", iResult);
return 1;
}
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::thread ListenThread{ [ListenSocket, ClientSocket](){listen(ListenSocket, ClientSocket); } };
ListenThread.join();
// Receive until the peer shuts down the connection
do {
std::cout << 14 << std::endl;
iResult = recv(ClientSocket, recvbuf, recvbuflen, 0);
if (iResult > 0) {
std::cout << 15 << std::endl;
printf("Bytes received: %d\n", iResult);
// Echo the buffer back to the sender
std::cout << 16 << std::endl;
iSendResult = send(ClientSocket, recvbuf, iResult, 0);
if (iSendResult == SOCKET_ERROR) {
std::cout << 17 << std::endl;
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
printf("Bytes sent: %d\n", iSendResult);
}
else if (iResult == 0) {
std::cout << 18 << std::endl;
printf("Connection closing...\n");
}
else {
std::cout << 19 << std::endl;
printf("recv failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
} while (iResult > 0);
// shutdown the connection since we're done
std::cout << 20 << std::endl;
iResult = shutdown(ClientSocket, SD_SEND);
if (iResult == SOCKET_ERROR) {
std::cout << 21 << std::endl;
printf("shutdown failed with error: %d\n", WSAGetLastError());
closesocket(ClientSocket);
WSACleanup();
return 1;
}
std::cout << 22 << std::endl;
// cleanup
closesocket(ClientSocket);
WSACleanup();
return 0;
}
int listen(SOCKET ListenSocket, SOCKET ClientSocket)
{
// Resolve the server address and port
std::cout << 4 << std::endl;
iResult = getaddrinfo(NULL, DEFAULT_PORT, &hints, &result);
if (iResult != 0) {
std::cout << 5 << std::endl;
printf("getaddrinfo failed with error: %d\n", iResult);
WSACleanup();
return 1;
}
// Create a SOCKET for connecting to server
std::cout << 6 << std::endl;
ListenSocket = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
if (ListenSocket == INVALID_SOCKET) {
std::cout << 7 << std::endl;
printf("socket failed with error: %ld\n", WSAGetLastError());
freeaddrinfo(result);
WSACleanup();
return 1;
}
// Setup the TCP listening socket
std::cout << 8 << std::endl;
iResult = bind(ListenSocket, result->ai_addr, (int)result->ai_addrlen);
if (iResult == SOCKET_ERROR) {
std::cout << 9 << std::endl;
printf("bind failed with error: %d\n", WSAGetLastError());
freeaddrinfo(result);
closesocket(ListenSocket);
WSACleanup();
return 1;
}
freeaddrinfo(result);
std::cout << 10 << std::endl;
iResult = listen(ListenSocket, SOMAXCONN);
if (iResult == SOCKET_ERROR) {
std::cout << 11 << std::endl;
printf("listen failed with error: %d\n", WSAGetLastError());
closesocket(ListenSocket);
WSACleanup();
return 1;
}
std::thread AcceptThread{ [ListenSocket, ClientSocket](){accept(ListenSocket, ClientSocket); } };
AcceptThread.join();
}
int accept(SOCKET ListenSocket, SOCKET ClientSocket)
{
// Accept a client socket
std::cout << 12 << std::endl;
do {
ClientSocket = accept(ListenSocket, NULL, NULL);
std::cout << 13 << std::endl;
if (ClientSocket == INVALID_SOCKET)
{
printf("accept failed with error: %d\n", WSAGetLastError());
}
}
while (ClientSocket == INVALID_SOCKET);
return 0;
}
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