ccid/src/ccid_serial.c

/*
 * ccid_serial.c: communicate with a GemPC Twin smart card reader
 * Copyright (C) 2001-2003 Ludovic Rousseau <ludovic.rousseau@free.fr>
 *
 * Thanks to Niki W. Waibel <niki.waibel@gmx.net> for a prototype version
 * 
 * This program is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along 
 * with this program; if not, write to the Free Software Foundation, Inc., 
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
 */

/*
 * $Id$
 */

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <termios.h>
#include <string.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/types.h>

#include "pcscdefines.h"
#include "config.h"
#include "debug.h"
#include "ccid.h"
#include "utils.h"

/* communication timeout in seconds */
#define SERIAL_TIMEOUT 2

#define SYNC 0x03
#define CTRL_ACK 0x06
#define CTRL_NAK 0x15
#define RDR_to_PC_NotifySlotChange 0x50
#define CARD_ABSENT 0x02
#define CARD_PRESENT 0x03

/*
 * normal command:
 * 1 : SYNC
 * 1 : CTRL
 * 10 +data length : CCID command
 * 1 : LRC
 *
 * SYNC : 0x03
 * CTRL : ACK (0x06) or NAK (0x15)
 * CCID command : see USB CCID specs
 * LRC : xor of all the previous byes
 *
 * Error message:
 * 1 : SYNC (0x03)
 * 1 : CTRL (NAK: 0x15)
 * 1 : LRC (0x16)
 *
 * Card insertion/withdrawal
 * 1 : RDR_to_PC_NotifySlotChange (0x50)
 * 1 : bmSlotIccState
 *     0x02 if card absent
 *     0x03 is card present
 *
 * Time request
 * T=1 : normal CCID command
 * T=0 : 1 byte (value between 0x80 and 0xFF)
 *
 */

/*
 * You may get read timeout after a card movement.
 * This is because you will get the echo of the CCID command
 * but not the result of the command.
 *
 * This is not an applicative issue since the card is either removed (and
 * powered off) or just inserted (and not yet powered on).
 */

/* 271 = max size for short APDU
 * 2 bytes for header
 * 1 byte checksum
 * doubled for echo
 */
#define GEMPCTWIN_MAXBUF (271 +2 +1) * 2

typedef struct
{
        /*
         * File handle on the serial port
         */
        int fd;

        /*
         * channel used (1..4)
         */
        int channel;

        /*
         * serial communication buffer
         */
        unsigned char buffer[GEMPCTWIN_MAXBUF];

        /*
         * next available byte
         */
        int buffer_offset;

        /*
         * number of available bytes
         */
        int buffer_offset_last;

        /*
         * CCID infos common to USB and serial
         */
        _ccid_descriptor ccid;

} _serialDevice;

/* The _serialDevice structure must be defined before including ccid_serial.h */
#include "ccid_serial.h"

static _serialDevice serialDevice[PCSCLITE_MAX_READERS] = {
        [ 0 ... (PCSCLITE_MAX_READERS-1) ] = { -1, -1 }
};

/*****************************************************************************
 * 
 *                              WriteSerial: Send bytes to the card reader
 *
 *****************************************************************************/
status_t WriteSerial(int lun, int length, unsigned char *buffer)
{
        int i;
        unsigned char lrc;
        unsigned char low_level_buffer[GEMPCTWIN_MAXBUF];

#ifdef DEBUG_LEVEL_COMM
        char debug_header[] = "-> 121234 ";

        sprintf(debug_header, "-> %06X ", (int)lun);
#endif

        if (length > GEMPCTWIN_MAXBUF-3)
        {
                DEBUG_CRITICAL3("command too long: %d for max %d",
                        length, GEMPCTWIN_MAXBUF-3);
                return STATUS_UNSUCCESSFUL;
        }

        /* header */
        low_level_buffer[0] = 0x03;     /* SYNC */
        low_level_buffer[1] = 0x06;     /* ACK */

        /* CCID command */
        memcpy(low_level_buffer+2, buffer, length);

        /* checksum */
        lrc = 0;
        for(i=0; i<length+2; i++)
                lrc ^= low_level_buffer[i];
        low_level_buffer[length+2] = lrc;

#ifdef DEBUG_LEVEL_COMM
        DEBUG_XXD(debug_header, low_level_buffer, length+3);
#endif

        if (write(serialDevice[LunToReaderIndex(lun)].fd, low_level_buffer,
                length+3) != length+3)
        {
                DEBUG_CRITICAL2("write error: %s", strerror(errno));
                return STATUS_UNSUCCESSFUL;
        }

        return STATUS_SUCCESS;
} /* WriteSerial */


/*****************************************************************************
 * 
 *                              ReadSerial: Receive bytes from the card reader
 *
 *****************************************************************************/
status_t ReadSerial(int lun, int *length, unsigned char *buffer)
{
        unsigned char c;
        int rv;
        int echo;
        int to_read;
        int i;

        /* we get the echo first */
        echo = TRUE;

start:
        DEBUG_COMM("start");
        if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
                return rv;

        if (c == RDR_to_PC_NotifySlotChange)
                goto slot_change;

        if (c == SYNC)
                goto sync;

        if (c >= 0x80)
        {       
                DEBUG_COMM2("time request: 0x%02X", c);
                goto start;
        }

        DEBUG_CRITICAL2("Got 0x%02X", c);
        return STATUS_COMM_ERROR;

slot_change:
        DEBUG_COMM("slot change");
        if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
                return rv;

        if (c == CARD_ABSENT)
                DEBUG_COMM("Card removed");
        else
                if (c == CARD_PRESENT)
                        DEBUG_COMM("Card inserted");
                else
                        DEBUG_COMM2("Unknown card movement: %d", buffer[3]);
        goto start;

sync:
        DEBUG_COMM("sync");
        if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
                return rv;

        if (c == CTRL_ACK)
                goto ack;

        if (c == CTRL_NAK)
                goto nak;

        DEBUG_CRITICAL2("Got 0x%02X instead of ACK/NAK", c);
        return STATUS_COMM_ERROR;

nak:
        DEBUG_COMM("nak");
        if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
                return rv;

        if (c != (SYNC ^ CTRL_NAK))
        {
                DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
                return STATUS_COMM_ERROR;
        }
        else
                goto start;

ack:
        DEBUG_COMM("ack");
        /* normal CCID frame */
        if ((rv = get_bytes(lun, buffer, 5)) != STATUS_SUCCESS)
                return rv;

        /* total frame size */
        to_read = 10+dw2i(buffer, 1);

        DEBUG_COMM2("frame size: %d", to_read);
        if ((rv = get_bytes(lun, buffer+5, to_read-5)) != STATUS_SUCCESS)
                return rv;

#ifdef DEBUG_LEVEL_COMM
                DEBUG_XXD("frame: ", buffer, to_read);
#endif

        /* lrc */
        DEBUG_COMM("lrc");
        if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
                return rv;

        DEBUG_COMM2("lrc: 0x%02X", c);
        for (i=0; i<to_read; i++)
                c ^= buffer[i];

        if (c != (SYNC ^ CTRL_ACK))
        {
                DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
                //return STATUS_COMM_ERROR;
        }

        if (echo)
        {
                echo = FALSE;
                goto start;
        }

        return STATUS_SUCCESS;
} /* ReadSerial */


/*****************************************************************************
 * 
 *                              get_bytes: get n bytes
 *
 *****************************************************************************/
int get_bytes(int lun, unsigned char *buffer, int length)
{
        int offset = serialDevice[LunToReaderIndex(lun)].buffer_offset;
        int offset_last = serialDevice[LunToReaderIndex(lun)].buffer_offset_last;

        DEBUG_COMM3("available: %d, needed: %d", offset_last-offset,
                length);
        /* enough data are available */
        if (offset + length <= offset_last)
        {
                DEBUG_COMM("data available");
                memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset, length);
                serialDevice[LunToReaderIndex(lun)].buffer_offset += length;
        }
        else
        {
                int present, rv;

                /* copy available data */
                present = offset_last - offset;

                if (present > 0)
                {
                        DEBUG_COMM2("some data available: %d", present);
                        memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset,
                                present);
                }

                /* get fresh data */
                DEBUG_COMM2("get more data: %d", length - present);
                rv = ReadChunk(lun, serialDevice[LunToReaderIndex(lun)].buffer, sizeof(serialDevice[LunToReaderIndex(lun)].buffer), length - present);
                if (rv < 0)
                        return STATUS_COMM_ERROR;

                /* fill the buffer */
                memcpy(buffer + present, serialDevice[LunToReaderIndex(lun)].buffer,
                        length - present);
                serialDevice[LunToReaderIndex(lun)].buffer_offset = length - present;
                serialDevice[LunToReaderIndex(lun)].buffer_offset_last = rv;
                DEBUG_COMM3("offset: %d, last_offset: %d",
                        serialDevice[LunToReaderIndex(lun)].buffer_offset,
                        serialDevice[LunToReaderIndex(lun)].buffer_offset_last);
        }

        return STATUS_SUCCESS;
} /* get_bytes */


/*****************************************************************************
 * 
 *                              ReadChunk: read a minimum number of bytes
 *
 *****************************************************************************/
int ReadChunk(int lun, unsigned char *buffer, int buffer_length, int min_length)
{
        int fd = serialDevice[LunToReaderIndex(lun)].fd;
        fd_set fdset;
        struct timeval t;
        int i, rv = 0;
        int already_read;
#ifdef DEBUG_LEVEL_COMM
        char debug_header[] = "<- 121234 ";

        sprintf(debug_header, "<- %06X ", (int)lun);
#endif

        already_read = 0;
        while (already_read < min_length)
        {
                /* use select() to, eventually, timeout */
                FD_ZERO(&fdset);
                FD_SET(fd, &fdset);
                t.tv_sec = SERIAL_TIMEOUT;
                t.tv_usec = 0;

                i = select(fd+1, &fdset, NULL, NULL, &t);
                if (i == -1)
                {
                        DEBUG_CRITICAL2("select: %s", strerror(errno));
                        return -1;
                }
                else
                        if (i == 0)
                        {
                                DEBUG_COMM2("Timeout! (%d sec)", SERIAL_TIMEOUT);
                                return -1;
                        }

                rv = read(fd, buffer + already_read, buffer_length - already_read);
                if (rv < 0)
                {
                        DEBUG_COMM2("read error: %s", strerror(errno));
                        return -1;
                }

#ifdef DEBUG_LEVEL_COMM
                DEBUG_XXD(debug_header, buffer + already_read, rv);
#endif

                already_read += rv;
                DEBUG_COMM3("read: %d, to read: %d", already_read,
                        min_length);
        }

        return already_read;
} /* ReadChunk */


/*****************************************************************************
 * 
 *                              OpenSerial: open the port
 *
 *****************************************************************************/
status_t OpenSerial(int lun, int channel)
{
        char dev_name[FILENAME_MAX];
        struct termios current_termios;
        int i;
        int reader = LunToReaderIndex(lun);

        DEBUG_COMM3("Lun: %X, Channel: %d", lun, channel);

        /*
         * Conversion of old-style ifd-hanler 1.0 CHANNELID 
         */
        if (channel == 0x0103F8)
                channel = 1;
        else
                if (channel == 0x0102F8)
                        channel = 2;
                else
                        if (channel == 0x0103E8)
                                channel = 3;
                        else
                                if (channel == 0x0102E8)
                                        channel = 4;

        if (channel < 0)
        {
                DEBUG_CRITICAL2("wrong port number: %d", (int) channel);
                return STATUS_UNSUCCESSFUL;
        }

        sprintf(dev_name, "/dev/pcsc/%d", (int) channel);

        /* check if the same channel is not already used */
        for (i=0; i<PCSCLITE_MAX_READERS; i++)
        {
                if (serialDevice[i].channel == channel)
                {
                        DEBUG_CRITICAL2("Channel %s already in use", dev_name);
                        return STATUS_UNSUCCESSFUL;
                }
        }

        serialDevice[reader].fd = open(dev_name, O_RDWR | O_NOCTTY);

        if (serialDevice[reader].fd <= 0)
        {
                DEBUG_CRITICAL3("open %s: %s", dev_name, strerror(errno));
                return STATUS_UNSUCCESSFUL;
        }

        /* set channel used */
        serialDevice[reader].channel = channel;

        /* empty in and out serial buffers */
        if (tcflush(serialDevice[reader].fd, TCIOFLUSH))
                        DEBUG_INFO2("tcflush() function error: %s", strerror(errno));

        /* get config attributes */
        if (tcgetattr(serialDevice[reader].fd, &current_termios) == -1)
        {
                DEBUG_INFO2("tcgetattr() function error: %s", strerror(errno));
                close(serialDevice[reader].fd);
                serialDevice[reader].fd = -1;

                return STATUS_UNSUCCESSFUL;
        }

        /* IGNBRK: ignore BREAK condition on input
         * IGNPAR: ignore framing errors and parity errors. */
        current_termios.c_iflag = IGNBRK | IGNPAR;
        current_termios.c_oflag = 0;    /* Raw output modes */
        /* CS8: 8-bits character size
         * CSTOPB: set two stop bits
         * CREAD: enable receiver
         * CLOCAL: ignore modem control lines */
        current_termios.c_cflag = CS8 | CSTOPB | CREAD | CLOCAL;

        /* Do not echo characters because if you connect to a host it or your modem
         * will echo characters for you.  Don't generate signals. */
        current_termios.c_lflag = 0;

        /* set serial port speed to 115200 bauds */
        cfsetspeed(&current_termios, B115200);

        DEBUG_INFO("Set serial port baudrate to 115200 and correct configuration");
        if (tcsetattr(serialDevice[reader].fd, TCSANOW, &current_termios) == -1)
        {
                close(serialDevice[reader].fd);
                serialDevice[reader].fd = -1;
                DEBUG_INFO2("tcsetattr error: %s", strerror(errno));

                return STATUS_UNSUCCESSFUL;
        }

        serialDevice[reader].ccid.bSeq = 0;
        serialDevice[reader].ccid.readerID = GEMPCTWIN;
        serialDevice[reader].ccid.dwMaxCCIDMessageLength = 271;
        serialDevice[reader].ccid.dwFeatures = 0x00010230;

        serialDevice[reader].buffer_offset = 0;
        serialDevice[reader].buffer_offset_last = 0;

        return STATUS_SUCCESS;
} /* OpenSerial */


/*****************************************************************************
 * 
 *                              CloseSerial: close the port
 *
 *****************************************************************************/
status_t CloseSerial(int lun)
{
        int reader = LunToReaderIndex(lun);

        close(serialDevice[reader].fd);

        serialDevice[reader].fd = -1;
        serialDevice[reader].channel = -1;

        return STATUS_SUCCESS;
} /* CloseSerial */


/*****************************************************************************
 *
 *                                      get_ccid_descriptor
 *
 ****************************************************************************/
_ccid_descriptor *get_ccid_descriptor(int lun)
{
        return &serialDevice[LunToReaderIndex(lun)].ccid;
} /* get_ccid_descriptor */


1	/*
2	* ccid_serial.c: communicate with a GemPC Twin smart card reader
3	* Copyright (C) 2001-2003 Ludovic Rousseau <ludovic.rousseau@free.fr>
4	*
5	* Thanks to Niki W. Waibel <niki.waibel@gmx.net> for a prototype version
6	*
7	* This program is free software; you can redistribute it and/or modify it
8	* under the terms of the GNU General Public License as published by the
9	* Free Software Foundation; either version 2 of the License, or (at your
10	* option) any later version.
11	*
12	* This program is distributed in the hope that it will be useful, but
13	* WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15	* General Public License for more details.
16	*
17	* You should have received a copy of the GNU General Public License along
18	* with this program; if not, write to the Free Software Foundation, Inc.,
19	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20	*/
21
22	/*
23	* $Id$
24	*/
25
26	#include <stdio.h>
27	#include <stdlib.h>
28	#include <fcntl.h>
29	#include <unistd.h>
30	#include <termios.h>
31	#include <string.h>
32	#include <errno.h>
33	#include <sys/time.h>
34	#include <sys/types.h>
35
36	#include "pcscdefines.h"
37	#include "config.h"
38	#include "debug.h"
39	#include "ccid.h"
40	#include "utils.h"
41
42	/* communication timeout in seconds */
43	#define SERIAL_TIMEOUT 2
44
45	#define SYNC 0x03
46	#define CTRL_ACK 0x06
47	#define CTRL_NAK 0x15
48	#define RDR_to_PC_NotifySlotChange 0x50
49	#define CARD_ABSENT 0x02
50	#define CARD_PRESENT 0x03
51
52	/*
53	* normal command:
54	* 1 : SYNC
55	* 1 : CTRL
56	* 10 +data length : CCID command
57	* 1 : LRC
58	*
59	* SYNC : 0x03
60	* CTRL : ACK (0x06) or NAK (0x15)
61	* CCID command : see USB CCID specs
62	* LRC : xor of all the previous byes
63	*
64	* Error message:
65	* 1 : SYNC (0x03)
66	* 1 : CTRL (NAK: 0x15)
67	* 1 : LRC (0x16)
68	*
69	* Card insertion/withdrawal
70	* 1 : RDR_to_PC_NotifySlotChange (0x50)
71	* 1 : bmSlotIccState
72	* 0x02 if card absent
73	* 0x03 is card present
74	*
75	* Time request
76	* T=1 : normal CCID command
77	* T=0 : 1 byte (value between 0x80 and 0xFF)
78	*
79	*/
80
81	/*
82	* You may get read timeout after a card movement.
83	* This is because you will get the echo of the CCID command
84	* but not the result of the command.
85	*
86	* This is not an applicative issue since the card is either removed (and
87	* powered off) or just inserted (and not yet powered on).
88	*/
89
90	/* 271 = max size for short APDU
91	* 2 bytes for header
92	* 1 byte checksum
93	* doubled for echo
94	*/
95	#define GEMPCTWIN_MAXBUF (271 +2 +1) * 2
96
97	typedef struct
98	{
99	/*
100	* File handle on the serial port
101	*/
102	int fd;
103
104	/*
105	* channel used (1..4)
106	*/
107	int channel;
108
109	/*
110	* serial communication buffer
111	*/
112	unsigned char buffer[GEMPCTWIN_MAXBUF];
113
114	/*
115	* next available byte
116	*/
117	int buffer_offset;
118
119	/*
120	* number of available bytes
121	*/
122	int buffer_offset_last;
123
124	/*
125	* CCID infos common to USB and serial
126	*/
127	_ccid_descriptor ccid;
128
129	} _serialDevice;
130
131	/* The _serialDevice structure must be defined before including ccid_serial.h */
132	#include "ccid_serial.h"
133
134	static _serialDevice serialDevice[PCSCLITE_MAX_READERS] = {
135	[ 0 ... (PCSCLITE_MAX_READERS-1) ] = { -1, -1 }
136	};
137
138	/*****************************************************************************
139	*
140	* WriteSerial: Send bytes to the card reader
141	*
142	*****************************************************************************/
143	status_t WriteSerial(int lun, int length, unsigned char *buffer)
144	{
145	int i;
146	unsigned char lrc;
147	unsigned char low_level_buffer[GEMPCTWIN_MAXBUF];
148
149	#ifdef DEBUG_LEVEL_COMM
150	char debug_header[] = "-> 121234 ";
151
152	sprintf(debug_header, "-> %06X ", (int)lun);
153	#endif
154
155	if (length > GEMPCTWIN_MAXBUF-3)
156	{
157	DEBUG_CRITICAL3("command too long: %d for max %d",
158	length, GEMPCTWIN_MAXBUF-3);
159	return STATUS_UNSUCCESSFUL;
160	}
161
162	/* header */
163	low_level_buffer[0] = 0x03; /* SYNC */
164	low_level_buffer[1] = 0x06; /* ACK */
165
166	/* CCID command */
167	memcpy(low_level_buffer+2, buffer, length);
168
169	/* checksum */
170	lrc = 0;
171	for(i=0; i<length+2; i++)
172	lrc ^= low_level_buffer[i];
173	low_level_buffer[length+2] = lrc;
174
175	#ifdef DEBUG_LEVEL_COMM
176	DEBUG_XXD(debug_header, low_level_buffer, length+3);
177	#endif
178
179	if (write(serialDevice[LunToReaderIndex(lun)].fd, low_level_buffer,
180	length+3) != length+3)
181	{
182	DEBUG_CRITICAL2("write error: %s", strerror(errno));
183	return STATUS_UNSUCCESSFUL;
184	}
185
186	return STATUS_SUCCESS;
187	} /* WriteSerial */
188
189
190	/*****************************************************************************
191	*
192	* ReadSerial: Receive bytes from the card reader
193	*
194	*****************************************************************************/
195	status_t ReadSerial(int lun, int length, unsigned char buffer)
196	{
197	unsigned char c;
198	int rv;
199	int echo;
200	int to_read;
201	int i;
202
203	/* we get the echo first */
204	echo = TRUE;
205
206	start:
207	DEBUG_COMM("start");
208	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
209	return rv;
210
211	if (c == RDR_to_PC_NotifySlotChange)
212	goto slot_change;
213
214	if (c == SYNC)
215	goto sync;
216
217	if (c >= 0x80)
218	{
219	DEBUG_COMM2("time request: 0x%02X", c);
220	goto start;
221	}
222
223	DEBUG_CRITICAL2("Got 0x%02X", c);
224	return STATUS_COMM_ERROR;
225
226	slot_change:
227	DEBUG_COMM("slot change");
228	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
229	return rv;
230
231	if (c == CARD_ABSENT)
232	DEBUG_COMM("Card removed");
233	else
234	if (c == CARD_PRESENT)
235	DEBUG_COMM("Card inserted");
236	else
237	DEBUG_COMM2("Unknown card movement: %d", buffer[3]);
238	goto start;
239
240	sync:
241	DEBUG_COMM("sync");
242	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
243	return rv;
244
245	if (c == CTRL_ACK)
246	goto ack;
247
248	if (c == CTRL_NAK)
249	goto nak;
250
251	DEBUG_CRITICAL2("Got 0x%02X instead of ACK/NAK", c);
252	return STATUS_COMM_ERROR;
253
254	nak:
255	DEBUG_COMM("nak");
256	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
257	return rv;
258
259	if (c != (SYNC ^ CTRL_NAK))
260	{
261	DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
262	return STATUS_COMM_ERROR;
263	}
264	else
265	goto start;
266
267	ack:
268	DEBUG_COMM("ack");
269	/* normal CCID frame */
270	if ((rv = get_bytes(lun, buffer, 5)) != STATUS_SUCCESS)
271	return rv;
272
273	/* total frame size */
274	to_read = 10+dw2i(buffer, 1);
275
276	DEBUG_COMM2("frame size: %d", to_read);
277	if ((rv = get_bytes(lun, buffer+5, to_read-5)) != STATUS_SUCCESS)
278	return rv;
279
280	#ifdef DEBUG_LEVEL_COMM
281	DEBUG_XXD("frame: ", buffer, to_read);
282	#endif
283
284	/* lrc */
285	DEBUG_COMM("lrc");
286	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
287	return rv;
288
289	DEBUG_COMM2("lrc: 0x%02X", c);
290	for (i=0; i<to_read; i++)
291	c ^= buffer[i];
292
293	if (c != (SYNC ^ CTRL_ACK))
294	{
295	DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
296	//return STATUS_COMM_ERROR;
297	}
298
299	if (echo)
300	{
301	echo = FALSE;
302	goto start;
303	}
304
305	return STATUS_SUCCESS;
306	} /* ReadSerial */
307
308
309	/*****************************************************************************
310	*
311	* get_bytes: get n bytes
312	*
313	*****************************************************************************/
314	int get_bytes(int lun, unsigned char *buffer, int length)
315	{
316	int offset = serialDevice[LunToReaderIndex(lun)].buffer_offset;
317	int offset_last = serialDevice[LunToReaderIndex(lun)].buffer_offset_last;
318
319	DEBUG_COMM3("available: %d, needed: %d", offset_last-offset,
320	length);
321	/* enough data are available */
322	if (offset + length <= offset_last)
323	{
324	DEBUG_COMM("data available");
325	memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset, length);
326	serialDevice[LunToReaderIndex(lun)].buffer_offset += length;
327	}
328	else
329	{
330	int present, rv;
331
332	/* copy available data */
333	present = offset_last - offset;
334
335	if (present > 0)
336	{
337	DEBUG_COMM2("some data available: %d", present);
338	memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset,
339	present);
340	}
341
342	/* get fresh data */
343	DEBUG_COMM2("get more data: %d", length - present);
344	rv = ReadChunk(lun, serialDevice[LunToReaderIndex(lun)].buffer, sizeof(serialDevice[LunToReaderIndex(lun)].buffer), length - present);
345	if (rv < 0)
346	return STATUS_COMM_ERROR;
347
348	/* fill the buffer */
349	memcpy(buffer + present, serialDevice[LunToReaderIndex(lun)].buffer,
350	length - present);
351	serialDevice[LunToReaderIndex(lun)].buffer_offset = length - present;
352	serialDevice[LunToReaderIndex(lun)].buffer_offset_last = rv;
353	DEBUG_COMM3("offset: %d, last_offset: %d",
354	serialDevice[LunToReaderIndex(lun)].buffer_offset,
355	serialDevice[LunToReaderIndex(lun)].buffer_offset_last);
356	}
357
358	return STATUS_SUCCESS;
359	} /* get_bytes */
360
361
362	/*****************************************************************************
363	*
364	* ReadChunk: read a minimum number of bytes
365	*
366	*****************************************************************************/
367	int ReadChunk(int lun, unsigned char *buffer, int buffer_length, int min_length)
368	{
369	int fd = serialDevice[LunToReaderIndex(lun)].fd;
370	fd_set fdset;
371	struct timeval t;
372	int i, rv = 0;
373	int already_read;
374	#ifdef DEBUG_LEVEL_COMM
375	char debug_header[] = "<- 121234 ";
376
377	sprintf(debug_header, "<- %06X ", (int)lun);
378	#endif
379
380	already_read = 0;
381	while (already_read < min_length)
382	{
383	/* use select() to, eventually, timeout */
384	FD_ZERO(&fdset);
385	FD_SET(fd, &fdset);
386	t.tv_sec = SERIAL_TIMEOUT;
387	t.tv_usec = 0;
388
389	i = select(fd+1, &fdset, NULL, NULL, &t);
390	if (i == -1)
391	{
392	DEBUG_CRITICAL2("select: %s", strerror(errno));
393	return -1;
394	}
395	else
396	if (i == 0)
397	{
398	DEBUG_COMM2("Timeout! (%d sec)", SERIAL_TIMEOUT);
399	return -1;
400	}
401
402	rv = read(fd, buffer + already_read, buffer_length - already_read);
403	if (rv < 0)
404	{
405	DEBUG_COMM2("read error: %s", strerror(errno));
406	return -1;
407	}
408
409	#ifdef DEBUG_LEVEL_COMM
410	DEBUG_XXD(debug_header, buffer + already_read, rv);
411	#endif
412
413	already_read += rv;
414	DEBUG_COMM3("read: %d, to read: %d", already_read,
415	min_length);
416	}
417
418	return already_read;
419	} /* ReadChunk */
420
421
422	/*****************************************************************************
423	*
424	* OpenSerial: open the port
425	*
426	*****************************************************************************/
427	status_t OpenSerial(int lun, int channel)
428	{
429	char dev_name[FILENAME_MAX];
430	struct termios current_termios;
431	int i;
432	int reader = LunToReaderIndex(lun);
433
434	DEBUG_COMM3("Lun: %X, Channel: %d", lun, channel);
435
436	/*
437	* Conversion of old-style ifd-hanler 1.0 CHANNELID
438	*/
439	if (channel == 0x0103F8)
440	channel = 1;
441	else
442	if (channel == 0x0102F8)
443	channel = 2;
444	else
445	if (channel == 0x0103E8)
446	channel = 3;
447	else
448	if (channel == 0x0102E8)
449	channel = 4;
450
451	if (channel < 0)
452	{
453	DEBUG_CRITICAL2("wrong port number: %d", (int) channel);
454	return STATUS_UNSUCCESSFUL;
455	}
456
457	sprintf(dev_name, "/dev/pcsc/%d", (int) channel);
458
459	/* check if the same channel is not already used */
460	for (i=0; i<PCSCLITE_MAX_READERS; i++)
461	{
462	if (serialDevice[i].channel == channel)
463	{
464	DEBUG_CRITICAL2("Channel %s already in use", dev_name);
465	return STATUS_UNSUCCESSFUL;
466	}
467	}
468
469	serialDevice[reader].fd = open(dev_name, O_RDWR \| O_NOCTTY);
470
471	if (serialDevice[reader].fd <= 0)
472	{
473	DEBUG_CRITICAL3("open %s: %s", dev_name, strerror(errno));
474	return STATUS_UNSUCCESSFUL;
475	}
476
477	/* set channel used */
478	serialDevice[reader].channel = channel;
479
480	/* empty in and out serial buffers */
481	if (tcflush(serialDevice[reader].fd, TCIOFLUSH))
482	DEBUG_INFO2("tcflush() function error: %s", strerror(errno));
483
484	/* get config attributes */
485	if (tcgetattr(serialDevice[reader].fd, &current_termios) == -1)
486	{
487	DEBUG_INFO2("tcgetattr() function error: %s", strerror(errno));
488	close(serialDevice[reader].fd);
489	serialDevice[reader].fd = -1;
490
491	return STATUS_UNSUCCESSFUL;
492	}
493
494	/* IGNBRK: ignore BREAK condition on input
495	* IGNPAR: ignore framing errors and parity errors. */
496	current_termios.c_iflag = IGNBRK \| IGNPAR;
497	current_termios.c_oflag = 0; /* Raw output modes */
498	/* CS8: 8-bits character size
499	* CSTOPB: set two stop bits
500	* CREAD: enable receiver
501	* CLOCAL: ignore modem control lines */
502	current_termios.c_cflag = CS8 \| CSTOPB \| CREAD \| CLOCAL;
503
504	/* Do not echo characters because if you connect to a host it or your modem
505	* will echo characters for you. Don't generate signals. */
506	current_termios.c_lflag = 0;
507
508	/* set serial port speed to 115200 bauds */
509	cfsetspeed(&current_termios, B115200);
510
511	DEBUG_INFO("Set serial port baudrate to 115200 and correct configuration");
512	if (tcsetattr(serialDevice[reader].fd, TCSANOW, &current_termios) == -1)
513	{
514	close(serialDevice[reader].fd);
515	serialDevice[reader].fd = -1;
516	DEBUG_INFO2("tcsetattr error: %s", strerror(errno));
517
518	return STATUS_UNSUCCESSFUL;
519	}
520
521	serialDevice[reader].ccid.bSeq = 0;
522	serialDevice[reader].ccid.readerID = GEMPCTWIN;
523	serialDevice[reader].ccid.dwMaxCCIDMessageLength = 271;
524	serialDevice[reader].ccid.dwFeatures = 0x00010230;
525
526	serialDevice[reader].buffer_offset = 0;
527	serialDevice[reader].buffer_offset_last = 0;
528
529	return STATUS_SUCCESS;
530	} /* OpenSerial */
531
532
533	/*****************************************************************************
534	*
535	* CloseSerial: close the port
536	*
537	*****************************************************************************/
538	status_t CloseSerial(int lun)
539	{
540	int reader = LunToReaderIndex(lun);
541
542	close(serialDevice[reader].fd);
543
544	serialDevice[reader].fd = -1;
545	serialDevice[reader].channel = -1;
546
547	return STATUS_SUCCESS;
548	} /* CloseSerial */
549
550
551	/*****************************************************************************
552	*
553	* get_ccid_descriptor
554	*
555	****************************************************************************/
556	_ccid_descriptor *get_ccid_descriptor(int lun)
557	{
558	return &serialDevice[LunToReaderIndex(lun)].ccid;
559	} /* get_ccid_descriptor */
560
561
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svn:keywords	Author Date Id Revision