Thread: cant connect to my server

For some reason, I can't seem to connect. I'm using Winsock.

This is my client program:

Code:

#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#pragma lib "ws2_32.lib"

int main()
{
	char recvstuff[100];
	char sendstuff[100];
	char ip[100];

	printf("type friend's ip address: ");
	fgets(ip, 25, stdin);


	// intialise winsock

	WSADATA wsaData;
	if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0)
	{
		printf("error one");
		getchar();
		exit(1);
	}


	// getaddrinfo call

	struct addrinfo *result = NULL, *ptr = NULL, hints;

	ZeroMemory(&hints, sizeof (hints));
	hints.ai_family=AF_UNSPEC;
	hints.ai_socktype=SOCK_STREAM;
	hints.ai_protocol=IPPROTO_TCP;
	
	if (getaddrinfo(ip, "7772", &hints, &result) != 0)
	{
		printf("error two");
		getchar();
		exit(1);
	}

	int sock;
	
	// make a socket
	ptr=result;

	sock=socket(ptr->ai_family, ptr->ai_socktype, ptr->ai_protocol);

	if (sock == -1)
	{
		printf("error three");
		getchar();
		exit(1);
	}

	// connect to a server
	if (connect(sock, ptr->ai_addr, (int)ptr->ai_addrlen) == -1)
	{
		printf("error four");
		getchar();
		exit(1);
	}

	printf("connected\n\n\n\n");

	freeaddrinfo(result);

	// main send and recieve loop

	while (strcmp(fgets(sendstuff, 102, stdin), "exit\n") != 0)
	{

		while (strcspn(sendstuff, "\n") == 102)
		{
			fgets(sendstuff, 102, stdin);
			if (send(sock, sendstuff, sizeof (sendstuff), 0) == -1)
			{
				printf("error five");
				getchar();
				exit(1);
			}
		}

		if (send(sock, sendstuff, sizeof (sendstuff), 0) == -1)
		{
			printf("error six");
			getchar();
			exit(1);
		}

		if (recv(sock, recvstuff, 100, 0) == -1)
		{
			printf("error seven");
			getchar();
			exit(1);
		}
		printf("%s\n", recvstuff);
	}

	// shut down winsock and end program

	closesocket(sock);

	WSACleanup();

	return 0;
}

and this is the server program:

Code:

#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#pragma lib "ws2_32.lib"

int main()
{
	char recvstuff[100];
	char sendstuff[100]="hi daniel!";

	// intialise winsock

	WSADATA wsaData;
	if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0)
	{
		printf("WSAStartup failed\n\n");
		exit(1);
	}


	// getaddrinfo call

	struct addrinfo *result=NULL, hints;

	ZeroMemory(&hints, sizeof (hints));
	hints.ai_family=AF_INET;
	hints.ai_socktype=SOCK_STREAM;
	hints.ai_protocol=IPPROTO_TCP;
	hints.ai_flags=AI_PASSIVE;

	if (getaddrinfo(NULL, "7772", &hints, &result) != 0)
	{
		printf("getaddrinfo failed\n\n");
		exit(1);
	}



	// make a socket

	int sock=socket(result->ai_family, result->ai_socktype, result->ai_protocol);

	if (sock == -1)
	{
		printf("socket failed\n\n");
		exit(1);
	}




	// bind the socket

	if (bind(sock, result->ai_addr, result->ai_addrlen) == -1)
	{
		printf("bind failed\n\n");
		exit(1);
	}

	freeaddrinfo(result);



	// listen on the socket

	if (listen(sock, SOMAXCONN) == -1)
	{
		printf("listen failed\n\n");
		exit(1);
	}



	// wait for connection

	int mainsock;

	mainsock=accept(sock, NULL, NULL);

	if (mainsock == -1)
	{
		printf("accept failed");
		exit(1);
	}

	printf("connected\n\n\n\n");

	closesocket(sock);

	while (recv(mainsock, recvstuff, 100, 0) != -1)
	{

		if (send(mainsock, sendstuff, sizeof (sendstuff), 0) == -1)
		{
			printf("send failed\n\n");
			exit(1);
		}

		printf("%s", recvstuff);
	}

	printf("they exited");
	getchar();

	closesocket(mainsock);
	WSACleanup();
	return 0;
}

run the server before the client, and when you run the client, type the ip of the server then just type like an IMing service

By saying "not working", I mean it doesn't even connect to the server. The client gives me an error four. And thanks about strlen() instead of sizeof, But with recv(), how would we know what the size is? We would have to recieve the information before we know how big it is, right? I also meant to lie to fgets() I did this so that there would be no limit on how big the package is. If it is larger than 100 bytes, it loops back until it has sent all the information. I learned from beej, but he has Linux, so some things are different. But I did learn from him.

Thanks guys, but these really are just details right now. This is just a test program. The actual problem is not being able to connect to the server at all. So, it would be nice to not dwell on that problem any more. Not to be rude, but that's not the real problem. Thanks.

So, why won't it connect to the server? Why does it give me an error four every time?