#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>

char buffer [1001];

void _send (int s, char* msg)
{
	int len;

	printf (">> %s", msg);
	send (s, msg, strlen (msg), 0);
	len = recv (s, buffer, 1000, 0);
	buffer [len] = 0;
	printf ("<< %s", buffer);
}

int main ()
{
	int sock;
	int len;
	struct sockaddr_in addr;

	addr.sin_family = AF_INET;
	addr.sin_port = htons (25);
	inet_aton ("213.165.64.21", &addr.sin_addr);
	memset (&addr.sin_zero, 0, 8);
	printf ("Starting up.\n");

	sock = socket (AF_INET, SOCK_STREAM, 0);
	if (sock == -1)
	{
		printf ("Could not create socket.\n");
		return 1;
	}

	printf ("Trying to connect...");
	if (connect (sock, (struct sockaddr*) &addr, sizeof (addr) ) == -1)
	{
		printf ("failed.\n");
		return 1;
	}
	else
		printf ("done.\n");


	len = recv (sock, buffer, 1000, 0);
	buffer [len] = 0;
	printf ("<< %s", buffer);

	_send (sock, "HELO ???@gmx.de\r\n");
	_send (sock, "AUTH LOGIN\r\n");
	_send (sock, "???\r\n");
	_send (sock, "???\r\n");
	_send (sock, "MAIL FROM:<???@gmx.de>\r\n");
	_send (sock, "RCPT TO:<???@gmx.de>\r\n");
	_send (sock, "DATA\r\n");
	_send (sock, "From: ???@gmx.de\r\nTo: Chefe\r\nSubject: Ein Test\r\nMIME-Version: 1.0\r\nContent-Type: multipart/alternative; boundary=foo\r\n\r\n--foo\r\nContent-Type: text/plain\r\n\r\nDas ist der Inhalt\r\n--foo\r\nContent-Type: image/gif\r\nContent-Transfer-Encoding: base64\r\nContent-Disposition: attachment; filename=egal.gif\r\n\r\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\r\n--foo--\r\n\r\n.\r\n");
	_send (sock, "QUIT\r\n");

	close (sock);

	printf ("Returning successfully.\n");
	return 0;
}