bankd: Verify bankd/client slot in tpduModemToCard rx handler

Change-Id: I58fce1392f418b36f5f61f224e03a9dbbe34f01f
changes/97/13497/1
Harald Welte 4 years ago
parent 4e7a285427
commit e1d3289ed9
  1. 16
      src/bankd_main.c

@ -550,6 +550,8 @@ static int worker_handle_tpduModemToCard(struct bankd_worker *worker, const Rspr
uint8_t rx_buf[1024];
DWORD rx_buf_len = sizeof(rx_buf);
RsproPDU_t *pdu_resp;
struct client_slot clslot;
struct bank_slot bslot;
long rc;
LOGW(worker, "tpduModemToCard(%s)\n", osmo_hexdump_nospc(mdm2sim->data.buf, mdm2sim->data.size));
@ -559,7 +561,19 @@ static int worker_handle_tpduModemToCard(struct bankd_worker *worker, const Rspr
return -104;
}
/* FIXME: Validate that toBankSlot / fromClientSlot match our expectations */
/* Validate that toBankSlot / fromClientSlot match our expectations */
rspro2client_slot(&clslot, &mdm2sim->fromClientSlot);
rspro2bank_slot(&bslot, &mdm2sim->toBankSlot);
if (!bank_slot_equals(&worker->slot, &bslot)) {
LOGW(worker, "Unexpected BankSlot %u:%u in tpduModemToCard\n",
bslot.bank_id, bslot.slot_nr);
return -105;
}
if (!client_slot_equals(&worker->client.clslot, &clslot)) {
LOGW(worker, "Unexpected ClientSlot %u:%u in tpduModemToCard\n",
clslot.client_id, clslot.slot_nr);
return -106;
}
rc = SCardTransmit(worker->reader.pcsc.hCard,
pioSendPci, mdm2sim->data.buf, mdm2sim->data.size,

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