#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <pcsclite.h>
#include <winscard.h>
#include "cardif.h"

u_char sim_resp_data[258];
unsigned sim_resp_data_len, sim_resp_sw;

apdu_exchange(cmd_apdu, cmd_apdu_len)
	u_char *cmd_apdu;
	unsigned cmd_apdu_len;
{
	LONG rv;
	DWORD dwRecvLength;
	u_char *sw;

	dwRecvLength = 258;
	rv = SCardTransmit(hCard, SCARD_PCI_T0, cmd_apdu, cmd_apdu_len, NULL,
			   sim_resp_data, &dwRecvLength);
	if (rv != SCARD_S_SUCCESS) {
		fprintf(stderr, "SCardTransmit: %s\n",
			pcsc_stringify_error(rv));
		return(-1);
	}
	if (dwRecvLength < 2) {
		fprintf(stderr,
		"error: SCardTransmit response is shorter than 2 SW bytes\n");
		return(-1);
	}
	sim_resp_data_len = dwRecvLength - 2;
	sw = sim_resp_data + sim_resp_data_len;
	sim_resp_sw = (sw[0] << 8) | sw[1];
	return(0);
}