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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#define SA struct sockaddr
/* Connects to the peer and returns a socket
* descriptor.
*/
extern int
tcp_connect (void)
{
const char *PORT = "5556";
const char *SERVER = "127.0.0.1";
int err, sd;
struct sockaddr_in sa;
/* connects to server
*/
sd = socket (AF_INET, SOCK_STREAM, 0);
memset (&sa, '\0', sizeof (sa));
sa.sin_family = AF_INET;
sa.sin_port = htons (atoi (PORT));
inet_pton (AF_INET, SERVER, &sa.sin_addr);
err = connect (sd, (SA *) & sa, sizeof (sa));
if (err < 0)
{
fprintf (stderr, "Connect error\n");
exit (1);
}
return sd;
}
/* closes the given socket descriptor.
*/
extern void
tcp_close (int sd)
{
shutdown (sd, SHUT_RDWR); /* no more receptions */
close (sd);
}
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