/* tcp_server.c - From Jon C. Snader: Effective TCP/IP Programming
 *           Addison-Wesley 2000
 *           For better understanding, read the excellent Snader book.
 */

#include "etcp.h"

/* tcp_server - set up for a TCP server 
                 hname: it is either a host name, or a dotted decimal address,
                        or NULL, in which case it is assumed to be INADDR_ANY;
                 sname: it is either a port number in host byte order, or
                        the name of a standard service
*/
SOCKET tcp_server( char *hname, char *sname )
{
	struct sockaddr_in local;
	SOCKET s;
	const int on = 1;

	set_address( hname, sname, &local, "tcp" );
	s = socket( AF_INET, SOCK_STREAM, 0 );
	if ( !isvalidsock( s ) )
		error( 1, errno, "socket call failed" );

	if ( setsockopt( s, SOL_SOCKET, SO_REUSEADDR,
		( char * )&on, sizeof( on ) ) )
		error( 1, errno, "setsockopt failed" );

	if ( bind( s, ( struct sockaddr * ) &local,
		 sizeof( local ) ) )
		error( 1, errno, "bind failed" );

	if ( listen( s, NLISTEN ) )
		error( 1, errno, "listen failed" );

	return s;
}