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scd: Fix resetting and closing of the reader. (Backported by gniibe)

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* scd/command.c (update_card_removed): Do no act on an invalid VRDR.
(do_reset): Ignore apdu_reset error codes for no and inactive card.
Close the reader before setting the slot to -1.
(update_reader_status_file): Notify the application before closing the
reader.
--

With this change the scd now works as it did in the past.  In
particular there is no more endless loop trying to open the reader by
the update_reader_status_file ticker function.  That bug basically
blocked all card operations until the scdaemon was killed.
This commit is contained in:
Werner Koch 2011-12-14 10:30:01 +01:00 committed by NIIBE Yutaka
parent 2d052240fb
commit 5c1eb6dba8
1 changed files with 17 additions and 8 deletions
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25
scd/command.c
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@ -181,6 +181,9 @@ update_card_removed (int slot, int value)
{
struct server_local_s *sl;
if (slot == -1)
return;
for (sl=session_list; sl; sl = sl->next_session)
if (sl->ctrl_backlink
&& sl->ctrl_backlink->reader_slot == slot)
@ -308,11 +311,19 @@ do_reset (ctrl_t ctrl, int send_reset)
tell the application layer about it. */
if (slot != -1 && send_reset && !IS_LOCKED (ctrl) )
{
if (apdu_reset (slot))
{
slot_table[slot].valid = 0;
}
application_notify_card_reset (slot);
switch (apdu_reset (slot))
{
case 0:
break;
case SW_HOST_NO_CARD:
case SW_HOST_CARD_INACTIVE:
break;
default:
apdu_close_reader (slot);
slot_table[slot].slot = slot = -1;
break;
}
}
/* If we hold a lock, unlock now. */
@ -1671,10 +1682,7 @@ cmd_getinfo (assuan_context_t ctx, char *line)
ss = &slot_table[slot];
if (!ss->valid)
BUG ();
if (ss->any && (ss->status & 1))
if (ss->valid && ss->any && (ss->status & 1))
flag = 'u';
}
rc = assuan_send_data (ctx, &flag, 1);
@ -2213,6 +2221,7 @@ update_reader_status_file (int set_card_removed_flag)
if (sw_apdu == SW_HOST_NO_READER)
{
/* Most likely the _reader_ has been unplugged. */
application_notify_card_reset (ss->slot);
apdu_close_reader (ss->slot);
ss->valid = 0;
status = 0;