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scd: Don't send GET_STATUS packet if not needed.

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* scd/apdu.c (apdu_get_status_internal): Add ON_WIRE arg.
(apdu_connect): Call apdu_get_status_internal with ON_WIRE enabled.
(apdu_get_status): For periodical check, call apdu_get_status_internal
with ON_WIRE disabled.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2017-01-30 09:05:37 +09:00
parent 216afba0d9
commit 7c8eee4d39
1 changed files with 19 additions and 8 deletions
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27
scd/apdu.c
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@ -367,8 +367,8 @@ long (* DLSTDCALL pcsc_control) (long card,
static int pcsc_vendor_specific_init (int slot); static int pcsc_vendor_specific_init (int slot);
static int pcsc_get_status (int slot, unsigned int *status); static int pcsc_get_status (int slot, unsigned int *status);
static int reset_pcsc_reader (int slot); static int reset_pcsc_reader (int slot);
static int apdu_get_status_internal (int slot, int hang, int no_atr_reset, static int apdu_get_status_internal (int slot, int hang, unsigned int *status,
unsigned int *status); int on_wire);
static int check_pcsc_pinpad (int slot, int command, pininfo_t *pininfo); static int check_pcsc_pinpad (int slot, int command, pininfo_t *pininfo);
static int pcsc_pinpad_verify (int slot, int class, int ins, int p0, int p1, static int pcsc_pinpad_verify (int slot, int class, int ins, int p0, int p1,
pininfo_t *pininfo); pininfo_t *pininfo);
@ -3386,7 +3386,7 @@ apdu_connect (int slot)
Without that we would force a reset of the card with the next Without that we would force a reset of the card with the next
call to apdu_get_status. */ call to apdu_get_status. */
if (!sw) if (!sw)
sw = apdu_get_status_internal (slot, 1, 1, &status); sw = apdu_get_status_internal (slot, 1, &status, 1);
if (sw) if (sw)
; ;
@ -3551,11 +3551,10 @@ apdu_get_atr (int slot, size_t *atrlen)
APDU_CARD_ACTIVE (bit 2) = card active APDU_CARD_ACTIVE (bit 2) = card active
(bit 3) = card access locked [not yet implemented] (bit 3) = card access locked [not yet implemented]
For must applications, testing bit 0 is sufficient. For most applications, testing bit 0 is sufficient.
*/ */
static int static int
apdu_get_status_internal (int slot, int hang, int no_atr_reset, apdu_get_status_internal (int slot, int hang, unsigned int *status, int on_wire)
unsigned int *status)
{ {
int sw; int sw;
unsigned int s; unsigned int s;
@ -3566,6 +3565,18 @@ apdu_get_status_internal (int slot, int hang, int no_atr_reset,
if ((sw = hang? lock_slot (slot) : trylock_slot (slot))) if ((sw = hang? lock_slot (slot) : trylock_slot (slot)))
return sw; return sw;
/* If the card (with its lower-level driver) doesn't require
GET_STATUS on wire (because it supports INTERRUPT transfer for
status change, or it's a token which has a card always inserted),
no need to send on wire. */
if (!on_wire && !reader_table[slot].require_get_status)
{
unlock_slot (slot);
if (status)
*status = (APDU_CARD_USABLE|APDU_CARD_ACTIVE);
return 0;
}
if (reader_table[slot].get_status_reader) if (reader_table[slot].get_status_reader)
sw = reader_table[slot].get_status_reader (slot, &s); sw = reader_table[slot].get_status_reader (slot, &s);
@ -3573,7 +3584,7 @@ apdu_get_status_internal (int slot, int hang, int no_atr_reset,
if (sw) if (sw)
{ {
if (!no_atr_reset) if (on_wire)
reader_table[slot].atrlen = 0; reader_table[slot].atrlen = 0;
s = 0; s = 0;
} }
@ -3592,7 +3603,7 @@ apdu_get_status (int slot, int hang, unsigned int *status)
if (DBG_READER) if (DBG_READER)
log_debug ("enter: apdu_get_status: slot=%d hang=%d\n", slot, hang); log_debug ("enter: apdu_get_status: slot=%d hang=%d\n", slot, hang);
sw = apdu_get_status_internal (slot, hang, 0, status); sw = apdu_get_status_internal (slot, hang, status, 0);
if (DBG_READER) if (DBG_READER)
{ {
if (status) if (status)