#

#include	"util.h"
#include	"pkts.h"
#include	"buf.h"
#include	"telnet.h"
#include	<ioctl.h>

tcp_passive_open(lskt)
short	lskt;
{
	register struct tcb	*ptcb;
	register struct rcvpkt	*ppkt;
	long			fhost;
	short			fskt;
	
	if ((ppkt = rd_pkt()) == NULL)
		return(FALSE);

	ptcb = &tcb;
	ptcb->t_state = LISTEN;
	fhost = ppkt->rp_inet.ip_src;

	if (!inet_init(ptcb, fhost)) return(FALSE);
	tcp_init(ptcb, lskt, 0);
	sb_init();

	if (!ch_inet(ptcb, ppkt) || !ch_tcp(ptcb, ppkt)) 
		enque(&frq, ppkt);

	if ((ptcb->t_state < SYN_RCVD) || (ptcb->t_state & CLOSED2))
		return(FALSE);

	close(net);
	fskt = swab(ptcb->t_tcp.tc_dskt);
	if (!net_init(lskt, fhost, fskt)) return(FALSE);

	if (!tcp_syn(ptcb)) return(FALSE);

	return(TRUE);
}

tcp_active_open(lskt, fhost, fskt)
short	lskt, fskt;
long	fhost;
{
	register struct tcb	*ptcb;

	ptcb = &tcb;
	ptcb->t_state = SYN_SENT;

	if (!net_init(lskt, fhost, fskt)) return(FALSE);

	if (!inet_init(ptcb, fhost)) return(FALSE);
	tcp_init(ptcb, lskt, fskt);
	sb_init();

	if (!tcp_syn(ptcb)) return(FALSE);

	return(TRUE);
}


/* tcp_syn  synchronize tcp connection
*/
tcp_syn(ptcb)
register struct tcb	*ptcb;
{
	register int		i;
	register struct scb	*pscb;
	short			nch;
			
	pscb = &scb;

	tcp_snd(ptcb, ptcb->t_iss, 1);

	for (i = 0; (ptcb->t_state < OPEN) && (i < 10); i++) {
		ioctl(net, FIONREAD, &nch);
		if (nch <= 0) sysleep(RETRANSTIME);
		time(&curtime);
		pkt_rcv(ptcb, pscb);
		ch_tcpsnd(ptcb);
		}

	if ( (ptcb->t_state < OPEN) || (ptcb->t_state & CLOSED2) )
		return(FALSE);

	return(TRUE);
}