/*
* Read data from the Telnet session to the raw input queue.
*/
static void
telnet_read(ndesc_t *nd, telnet_t *tp)
{
int cc;
if (!nq_full(tp->t_rawq))
{
if (tp->t_flags & TF_URGENT)
{
if (at_mark(nd_fd(nd)))
{
tp->t_flags &= ~TF_URGENT;
nd_enable(nd, ND_X);
}
}
cc = nq_recv(tp->t_rawq, nd_fd(nd), &tp->t_rblen);
if (cc == -1)
{
switch (errno)
{
case EWOULDBLOCK:
case EINTR:
case EPROTO:
break;
default:
telnet_disconnect(tp);
return;
}
}
if (cc == 0)
{
telnet_disconnect(tp);
return;
}
if ((tp->t_flags & TF_FLOWC) == 0)
nd_enable(nd, ND_C);
telnet_enabr(tp);
if (!nq_full(tp->t_rawq))
return;
}
tp->t_flags |= TF_ENABR;
nd_disable(nd, ND_R);
}
/*
* Send the contents of the canonical queue to the interactive object.
*/
static void
telnet_eol(telnet_t *tp)
{
char *cp;
if (tp->t_flags & TF_SYNCH)
return;
if (nq_full(tp->t_canq))
{
tp->t_flags &= ~TF_OVFLCANQ;
cp = "";
}
else
{
nq_putc(tp->t_canq, '\0');
cp = (char *)nq_rptr(tp->t_canq);
}
if (tp->t_flags & TF_ATTACH)
interactive_input(tp->t_ip, cp);
nq_init(tp->t_canq);
tp->t_flags &= ~TF_GA;
}
static void
telnet_interactive(void *vp)
{
telnet_t *tp = vp;
char *cp;
if (!(tp->t_flags & TF_ATTACH)) {
tp->task = NULL;
telnet_shutdown(tp->t_nd, tp);
return;
}
if (tp->t_flags & TF_DISCONNECT) {
tp->t_flags &= ~TF_DISCONNECT;
if (tp->t_ip)
remove_interactive(tp->t_ip, 1);
}
if (!(tp->t_flags & TF_ATTACH)) {
tp->task = NULL;
telnet_shutdown(tp->t_nd, tp);
return;
}
if (tp->t_flags & TF_OVFLOUTQ) {
tp->task = NULL;
return;
}
if (tp->t_flags & TF_INPUT) {
tp->t_flags &= ~TF_INPUT;
if (nq_full(tp->t_canq))
cp = "";
else
cp = (char *)nq_rptr(tp->t_canq);
interactive_input(tp->t_ip, cp);
nq_init(tp->t_canq);
}
if (!(tp->t_flags & TF_ATTACH)) {
tp->task = NULL;
telnet_shutdown(tp->t_nd, tp);
return;
}
tp->t_flags &= ~TF_GA;
telnet_readbytes(tp->t_nd, tp);
telnet_input(tp);
if (!(tp->t_flags & TF_ATTACH)) {
tp->task = NULL;
telnet_shutdown(tp->t_nd, tp);
return;
}
if (tp->t_flags & (TF_INPUT|TF_DISCONNECT)) {
reschedule_task(tp->task);
return;
}
tp->task = NULL;
nd_enable(tp->t_nd, ND_R);
}
/*
* Append a character to the option queue.
*/
static void
telnet_optq_putc(telnet_t *tp, u_char c)
{
if (tp->t_flags & TF_OVFLOPTQ)
return;
if (!nq_full(tp->t_optq))
nq_putc(tp->t_optq, c);
else
tp->t_flags |= TF_OVFLOPTQ;
}
/*
* Send the contents of the canonical queue to the interactive object.
*/
static void
telnet_eol(telnet_t *tp)
{
if (tp->t_flags & TF_SYNCH)
return;
if (nq_full(tp->t_canq))
{
tp->t_flags &= ~TF_OVFLCANQ;
}
else
{
nq_putc(tp->t_canq, '\0');
}
tp->t_flags |= TF_INPUT;
}
/*
* Append a character to the canonical queue.
*/
static void
telnet_canq_putc(telnet_t *tp, u_char c)
{
if (tp->t_flags & (TF_OVFLCANQ | TF_SYNCH))
return;
if (!nq_full(tp->t_canq))
{
nq_putc(tp->t_canq, c);
}
else
{
tp->t_flags |= TF_OVFLCANQ;
if (nq_avail(tp->t_outq) > 0)
{
nq_putc(tp->t_outq, BEL);
telnet_enabw(tp);
}
}
}
