RCODE_BUSY
rcode = RCODE_BUSY;
return RCODE_BUSY;
if (rcode != RCODE_BUSY)
return RCODE_BUSY;
[RCODE_BUSY] = "busy",
close_transaction(t, card, RCODE_BUSY, packet->timestamp);
fw_fill_response(&response, packet->header, RCODE_BUSY, NULL, 0);