/*
* This function performs a shutdown-read on a stream interface attached to an
* applet in a connected or init state (it does nothing for other states). It
* either shuts the read side or marks itself as closed. The buffer flags are
* updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
* we also forward the close to the write side. The owner task is woken up if
* it exists.
*/
static void stream_int_shutr_applet(struct stream_interface *si)
{
struct channel *ic = si_ic(si);
ic->flags &= ~CF_SHUTR_NOW;
if (ic->flags & CF_SHUTR)
return;
ic->flags |= CF_SHUTR;
ic->rex = TICK_ETERNITY;
si->flags &= ~SI_FL_WAIT_ROOM;
/* Note: on shutr, we don't call the applet */
if (si->state != SI_ST_EST && si->state != SI_ST_CON)
return;
if (si_oc(si)->flags & CF_SHUTW) {
si_applet_release(si);
si->state = SI_ST_DIS;
si->exp = TICK_ETERNITY;
}
else if (si->flags & SI_FL_NOHALF) {
/* we want to immediately forward this close to the write side */
return stream_int_shutw_applet(si);
}
}
/*
* This function performs a shutdown-read on a stream interface attached to an
* applet in a connected or init state (it does nothing for other states). It
* either shuts the read side or marks itself as closed. The buffer flags are
* updated to reflect the new state. If the stream interface has SI_FL_NOHALF,
* we also forward the close to the write side. The owner task is woken up if
* it exists.
*/
static void stream_int_shutr(struct stream_interface *si)
{
si->ib->flags &= ~CF_SHUTR_NOW;
if (si->ib->flags & CF_SHUTR)
return;
si->ib->flags |= CF_SHUTR;
si->ib->rex = TICK_ETERNITY;
si->flags &= ~SI_FL_WAIT_ROOM;
if (si->state != SI_ST_EST && si->state != SI_ST_CON)
return;
if (si->ob->flags & CF_SHUTW) {
si->state = SI_ST_DIS;
si->exp = TICK_ETERNITY;
si_applet_release(si);
}
else if (si->flags & SI_FL_NOHALF) {
/* we want to immediately forward this close to the write side */
return stream_int_shutw(si);
}
/* note that if the task exists, it must unregister itself once it runs */
if (!(si->flags & SI_FL_DONT_WAKE) && si->owner)
task_wakeup(si->owner, TASK_WOKEN_IO);
}
/*
* This function performs a shutdown-write on a stream interface attached to an
* applet in a connected or init state (it does nothing for other states). It
* either shuts the write side or marks itself as closed. The buffer flags are
* updated to reflect the new state. It does also close everything if the SI
* was marked as being in error state. The owner task is woken up if it exists.
*/
static void stream_int_shutw(struct stream_interface *si)
{
struct channel *ic = si_ic(si);
struct channel *oc = si_oc(si);
oc->flags &= ~CF_SHUTW_NOW;
if (oc->flags & CF_SHUTW)
return;
oc->flags |= CF_SHUTW;
oc->wex = TICK_ETERNITY;
si->flags &= ~SI_FL_WAIT_DATA;
switch (si->state) {
case SI_ST_EST:
/* we have to shut before closing, otherwise some short messages
* may never leave the system, especially when there are remaining
* unread data in the socket input buffer, or when nolinger is set.
* However, if SI_FL_NOLINGER is explicitly set, we know there is
* no risk so we close both sides immediately.
*/
if (!(si->flags & (SI_FL_ERR | SI_FL_NOLINGER)) &&
!(ic->flags & (CF_SHUTR|CF_DONT_READ)))
return;
/* fall through */
case SI_ST_CON:
case SI_ST_CER:
case SI_ST_QUE:
case SI_ST_TAR:
/* Note that none of these states may happen with applets */
si->state = SI_ST_DIS;
si_applet_release(si);
default:
si->flags &= ~(SI_FL_WAIT_ROOM | SI_FL_NOLINGER);
ic->flags &= ~CF_SHUTR_NOW;
ic->flags |= CF_SHUTR;
ic->rex = TICK_ETERNITY;
si->exp = TICK_ETERNITY;
}
/* note that if the task exists, it must unregister itself once it runs */
if (!(si->flags & SI_FL_DONT_WAKE))
task_wakeup(si_task(si), TASK_WOKEN_IO);
}
