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usb-ccid: better bulk_out error handling

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Add err goto label where we can jump to from all error conditions.
STALL request on all errors.  Reset position on all errors.

Normal request processing is not in a else branch any more, so this code
is reintended, there are no code changes in that part of the code
though.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 1487250819-23764-2-git-send-email-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2017-02-16 14:13:37 +01:00
parent 558ff1b6ef
commit 0aeebc73b7
1 changed files with 61 additions and 55 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

116
hw/usb/dev-smartcard-reader.c
View File

@ -1001,8 +1001,7 @@ static void ccid_handle_bulk_out(USBCCIDState *s, USBPacket *p)
CCID_Header *ccid_header;
if (p->iov.size + s->bulk_out_pos > BULK_OUT_DATA_SIZE) {
p->status = USB_RET_STALL;
return;
goto err;
}
ccid_header = (CCID_Header *)s->bulk_out_data;
usb_packet_copy(p, s->bulk_out_data + s->bulk_out_pos, p->iov.size);
@ -1017,64 +1016,71 @@ static void ccid_handle_bulk_out(USBCCIDState *s, USBPacket *p)
DPRINTF(s, 1,
"%s: bad USB_TOKEN_OUT length, should be at least 10 bytes\n",
__func__);
} else {
DPRINTF(s, D_MORE_INFO, "%s %x %s\n", __func__,
ccid_header->bMessageType,
ccid_message_type_to_str(ccid_header->bMessageType));
switch (ccid_header->bMessageType) {
case CCID_MESSAGE_TYPE_PC_to_RDR_GetSlotStatus:
ccid_write_slot_status(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_IccPowerOn:
DPRINTF(s, 1, "%s: PowerOn: %d\n", __func__,
goto err;
}
DPRINTF(s, D_MORE_INFO, "%s %x %s\n", __func__,
ccid_header->bMessageType,
ccid_message_type_to_str(ccid_header->bMessageType));
switch (ccid_header->bMessageType) {
case CCID_MESSAGE_TYPE_PC_to_RDR_GetSlotStatus:
ccid_write_slot_status(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_IccPowerOn:
DPRINTF(s, 1, "%s: PowerOn: %d\n", __func__,
((CCID_IccPowerOn *)(ccid_header))->bPowerSelect);
s->powered = true;
if (!ccid_card_inserted(s)) {
ccid_report_error_failed(s, ERROR_ICC_MUTE);
}
/* atr is written regardless of error. */
ccid_write_data_block_atr(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_IccPowerOff:
ccid_reset_error_status(s);
s->powered = false;
ccid_write_slot_status(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_XfrBlock:
ccid_on_apdu_from_guest(s, (CCID_XferBlock *)s->bulk_out_data);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_SetParameters:
ccid_reset_error_status(s);
ccid_set_parameters(s, ccid_header);
ccid_write_parameters(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_ResetParameters:
ccid_reset_error_status(s);
ccid_reset_parameters(s);
ccid_write_parameters(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_GetParameters:
ccid_reset_error_status(s);
ccid_write_parameters(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_Mechanical:
ccid_report_error_failed(s, 0);
ccid_write_slot_status(s, ccid_header);
break;
default:
DPRINTF(s, 1,
s->powered = true;
if (!ccid_card_inserted(s)) {
ccid_report_error_failed(s, ERROR_ICC_MUTE);
}
/* atr is written regardless of error. */
ccid_write_data_block_atr(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_IccPowerOff:
ccid_reset_error_status(s);
s->powered = false;
ccid_write_slot_status(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_XfrBlock:
ccid_on_apdu_from_guest(s, (CCID_XferBlock *)s->bulk_out_data);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_SetParameters:
ccid_reset_error_status(s);
ccid_set_parameters(s, ccid_header);
ccid_write_parameters(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_ResetParameters:
ccid_reset_error_status(s);
ccid_reset_parameters(s);
ccid_write_parameters(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_GetParameters:
ccid_reset_error_status(s);
ccid_write_parameters(s, ccid_header);
break;
case CCID_MESSAGE_TYPE_PC_to_RDR_Mechanical:
ccid_report_error_failed(s, 0);
ccid_write_slot_status(s, ccid_header);
break;
default:
DPRINTF(s, 1,
"handle_data: ERROR: unhandled message type %Xh\n",
ccid_header->bMessageType);
/*
* The caller is expecting the device to respond, tell it we
* don't support the operation.
*/
ccid_report_error_failed(s, ERROR_CMD_NOT_SUPPORTED);
ccid_write_slot_status(s, ccid_header);
break;
}
/*
* The caller is expecting the device to respond, tell it we
* don't support the operation.
*/
ccid_report_error_failed(s, ERROR_CMD_NOT_SUPPORTED);
ccid_write_slot_status(s, ccid_header);
break;
}
s->bulk_out_pos = 0;
return;
err:
p->status = USB_RET_STALL;
s->bulk_out_pos = 0;
return;
}
static void ccid_bulk_in_copy_to_guest(USBCCIDState *s, USBPacket *p)