Comments by GeorgeZv (Top 9 by date)

#pragma comment(lib, "ws2_32.lib")
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#include <winsock2.h>
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
//#include "list.h"

#define PRINTUSERS if (nclients)\
	printf("We have %d user online\n", nclients);\
	else printf("No users online\n***************\n");

#define PORT 3765
#define BACKLOG 10
#define MAXDATASIZE 1024
#define MAXUSERSONLINE 64

struct client
{
	int numClient;
	struct client* next;
};

void print(struct client* head);
int pushBack(struct client** head, int numClient);
int checkSockOpt(int socket);

int main(int argc, char* argv[])
{
	struct sockaddr_in serverAddr;
	struct sockaddr_in clientAddr;

	SOCKET socketDescriptor;
	fd_set readSocketDescriptor;
	fd_set writeSocketDescriptor;
	int newSocketDescriptor;

	WSADATA wsaData;
	WORD wsaStart;
	timeval tv;

	// LIST TEST #1
	struct client* head = 0;
	pushBack(&head, 111);
	pushBack(&head, 222);
	pushBack(&head, 999);
	print(head); //

	int retVal;
	int clientAddrSize = sizeof(clientAddr);
	char bufferData[MAXDATASIZE] = { 0 };
	int nclients = 0;
	int numBytes = 0;

	if (argc > 1)
	{
		printf("Uses: <chatserver>\n");
		return -1;
	}
	do
	{
		if ((wsaStart = WSAStartup(MAKEWORD(2, 2), &wsaData)) != 0)
		{
			printf("WSAStartup error ");
			break;
		}
		if ((socketDescriptor = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET)
		{
			printf("Socket error ");
			closesocket(socketDescriptor);
			break;
		}

		serverAddr.sin_family = AF_INET;
		serverAddr.sin_port = htons(PORT);
		serverAddr.sin_addr.s_addr = INADDR_ANY;

		if (bind(socketDescriptor, (struct sockaddr *)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR)
		{
			printf("Bind error ");
			closesocket(socketDescriptor);

			break;
		}
		if (listen(socketDescriptor, BACKLOG) == SOCKET_ERROR)
		{
			printf("Listening error ");
			closesocket(socketDescriptor);
			break;
		}

		while (1)
		{

			FD_ZERO(&readSocketDescriptor);
			FD_ZERO(&writeSocketDescriptor);
			FD_SET(socketDescriptor, &readSocketDescriptor);
			FD_SET(socketDescriptor, &writeSocketDescriptor);

			printf("Setup SERVER socket descriptor number: %d\n", socketDescriptor);
			tv.tv_sec = 5;

			// Do not forget to put after WHILE(1)
			if ((retVal = select(socketDescriptor + 1, &readSocketDescriptor, &writeSocketDescriptor, NULL, &tv)) == SOCKET_ERROR)
			{
				printf("Select error ");
				break;
			}
			if ((FD_ISSET(socketDescriptor, &readSocketDescriptor)) != 0)
			{
				printf("CHECK FD_ISSET value #1: %d\n", FD_ISSET(socketDescriptor, &readSocketDescriptor));
				//int clientList[MAXUSERSONLINE] = { 0 };
				//for (int i = 0; i <= MAXUSERSONLINE; i++)
				//{

				if ((newSocketDescriptor = accept(socketDescriptor, (struct sockaddr *)&clientAddr, &clientAddrSize)) == SOCKET_ERROR)
				{
					printf("Accept error ");
					break;
				}
				//	newSocketDescriptor = clientList[i];
				struct client* head = 0;
				pushBack(&head, newSocketDescriptor);
				print(head); //
				nclients++; PRINTUSERS

					printf("Server got connection from %s\n", inet_ntoa(clientAddr.sin_addr));
				FD_SET(newSocketDescriptor, &readSocketDescriptor);
				//FD_CLR(socketDescriptor, &readSocketDes