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;

        /*
         * device used ("/dev/ttyS?" under Linux)
         */
        char *device;

        /*
         * 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, NULL }
};

/*****************************************************************************
 * 
 *                              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];

        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);

        return OpenSerialByName(lun, dev_name);
} /* OpenSerial */

/*****************************************************************************
 * 
 *                              OpenSerialByName: open the port
 *
 *****************************************************************************/
status_t OpenSerialByName(int lun, char *dev_name)
{
        struct termios current_termios;
        int i;
        int reader = LunToReaderIndex(lun);

        DEBUG_COMM3("Lun: %X, Device: %d", lun, dev_name);

        /* check if the same channel is not already used */
        for (i=0; i<PCSCLITE_MAX_READERS; i++)
        {
                if (serialDevice[i].device &&
                        strcmp(serialDevice[i].device, dev_name) == 0)
                {
                        DEBUG_CRITICAL2("Device %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].device = strdup(dev_name);

        /* 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.dwMaxIFSD = 254;
        serialDevice[reader].ccid.dwFeatures = 0x00010230;
        serialDevice[reader].ccid.dwDefaultClock = 4000;
        serialDevice[reader].ccid.dwMaxDataRate = 344086;

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

        return STATUS_SUCCESS;
} /* OpenSerialByName */


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

        close(serialDevice[reader].fd);
        serialDevice[reader].fd = -1;

        free(serialDevice[reader].device);
        serialDevice[reader].device = NULL;

        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	* device used ("/dev/ttyS?" under Linux)
106	*/
107	char *device;
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, NULL }
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	{
233	DEBUG_COMM("Card removed");
234	}
235	else
236	if (c == CARD_PRESENT)
237	{
238	DEBUG_COMM("Card inserted");
239	}
240	else
241	{
242	DEBUG_COMM2("Unknown card movement: %d", buffer[3]);
243	}
244	goto start;
245
246	sync:
247	DEBUG_COMM("sync");
248	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
249	return rv;
250
251	if (c == CTRL_ACK)
252	goto ack;
253
254	if (c == CTRL_NAK)
255	goto nak;
256
257	DEBUG_CRITICAL2("Got 0x%02X instead of ACK/NAK", c);
258	return STATUS_COMM_ERROR;
259
260	nak:
261	DEBUG_COMM("nak");
262	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
263	return rv;
264
265	if (c != (SYNC ^ CTRL_NAK))
266	{
267	DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
268	return STATUS_COMM_ERROR;
269	}
270	else
271	goto start;
272
273	ack:
274	DEBUG_COMM("ack");
275	/* normal CCID frame */
276	if ((rv = get_bytes(lun, buffer, 5)) != STATUS_SUCCESS)
277	return rv;
278
279	/* total frame size */
280	to_read = 10+dw2i(buffer, 1);
281
282	DEBUG_COMM2("frame size: %d", to_read);
283	if ((rv = get_bytes(lun, buffer+5, to_read-5)) != STATUS_SUCCESS)
284	return rv;
285
286	#ifdef DEBUG_LEVEL_COMM
287	DEBUG_XXD("frame: ", buffer, to_read);
288	#endif
289
290	/* lrc */
291	DEBUG_COMM("lrc");
292	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
293	return rv;
294
295	DEBUG_COMM2("lrc: 0x%02X", c);
296	for (i=0; i<to_read; i++)
297	c ^= buffer[i];
298
299	if (c != (SYNC ^ CTRL_ACK))
300	{
301	DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
302	//return STATUS_COMM_ERROR;
303	}
304
305	if (echo)
306	{
307	echo = FALSE;
308	goto start;
309	}
310
311	return STATUS_SUCCESS;
312	} /* ReadSerial */
313
314
315	/*****************************************************************************
316	*
317	* get_bytes: get n bytes
318	*
319	*****************************************************************************/
320	int get_bytes(int lun, unsigned char *buffer, int length)
321	{
322	int offset = serialDevice[LunToReaderIndex(lun)].buffer_offset;
323	int offset_last = serialDevice[LunToReaderIndex(lun)].buffer_offset_last;
324
325	DEBUG_COMM3("available: %d, needed: %d", offset_last-offset,
326	length);
327	/* enough data are available */
328	if (offset + length <= offset_last)
329	{
330	DEBUG_COMM("data available");
331	memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset, length);
332	serialDevice[LunToReaderIndex(lun)].buffer_offset += length;
333	}
334	else
335	{
336	int present, rv;
337
338	/* copy available data */
339	present = offset_last - offset;
340
341	if (present > 0)
342	{
343	DEBUG_COMM2("some data available: %d", present);
344	memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset,
345	present);
346	}
347
348	/* get fresh data */
349	DEBUG_COMM2("get more data: %d", length - present);
350	rv = ReadChunk(lun, serialDevice[LunToReaderIndex(lun)].buffer, sizeof(serialDevice[LunToReaderIndex(lun)].buffer), length - present);
351	if (rv < 0)
352	return STATUS_COMM_ERROR;
353
354	/* fill the buffer */
355	memcpy(buffer + present, serialDevice[LunToReaderIndex(lun)].buffer,
356	length - present);
357	serialDevice[LunToReaderIndex(lun)].buffer_offset = length - present;
358	serialDevice[LunToReaderIndex(lun)].buffer_offset_last = rv;
359	DEBUG_COMM3("offset: %d, last_offset: %d",
360	serialDevice[LunToReaderIndex(lun)].buffer_offset,
361	serialDevice[LunToReaderIndex(lun)].buffer_offset_last);
362	}
363
364	return STATUS_SUCCESS;
365	} /* get_bytes */
366
367
368	/*****************************************************************************
369	*
370	* ReadChunk: read a minimum number of bytes
371	*
372	*****************************************************************************/
373	int ReadChunk(int lun, unsigned char *buffer, int buffer_length, int min_length)
374	{
375	int fd = serialDevice[LunToReaderIndex(lun)].fd;
376	fd_set fdset;
377	struct timeval t;
378	int i, rv = 0;
379	int already_read;
380	#ifdef DEBUG_LEVEL_COMM
381	char debug_header[] = "<- 121234 ";
382
383	sprintf(debug_header, "<- %06X ", (int)lun);
384	#endif
385
386	already_read = 0;
387	while (already_read < min_length)
388	{
389	/* use select() to, eventually, timeout */
390	FD_ZERO(&fdset);
391	FD_SET(fd, &fdset);
392	t.tv_sec = SERIAL_TIMEOUT;
393	t.tv_usec = 0;
394
395	i = select(fd+1, &fdset, NULL, NULL, &t);
396	if (i == -1)
397	{
398	DEBUG_CRITICAL2("select: %s", strerror(errno));
399	return -1;
400	}
401	else
402	if (i == 0)
403	{
404	DEBUG_COMM2("Timeout! (%d sec)", SERIAL_TIMEOUT);
405	return -1;
406	}
407
408	rv = read(fd, buffer + already_read, buffer_length - already_read);
409	if (rv < 0)
410	{
411	DEBUG_COMM2("read error: %s", strerror(errno));
412	return -1;
413	}
414
415	#ifdef DEBUG_LEVEL_COMM
416	DEBUG_XXD(debug_header, buffer + already_read, rv);
417	#endif
418
419	already_read += rv;
420	DEBUG_COMM3("read: %d, to read: %d", already_read,
421	min_length);
422	}
423
424	return already_read;
425	} /* ReadChunk */
426
427
428	/*****************************************************************************
429	*
430	* OpenSerial: open the port
431	*
432	*****************************************************************************/
433	status_t OpenSerial(int lun, int channel)
434	{
435	char dev_name[FILENAME_MAX];
436
437	DEBUG_COMM3("Lun: %X, Channel: %d", lun, channel);
438
439	/*
440	* Conversion of old-style ifd-hanler 1.0 CHANNELID
441	*/
442	if (channel == 0x0103F8)
443	channel = 1;
444	else
445	if (channel == 0x0102F8)
446	channel = 2;
447	else
448	if (channel == 0x0103E8)
449	channel = 3;
450	else
451	if (channel == 0x0102E8)
452	channel = 4;
453
454	if (channel < 0)
455	{
456	DEBUG_CRITICAL2("wrong port number: %d", (int) channel);
457	return STATUS_UNSUCCESSFUL;
458	}
459
460	sprintf(dev_name, "/dev/pcsc/%d", (int) channel);
461
462	return OpenSerialByName(lun, dev_name);
463	} /* OpenSerial */
464
465	/*****************************************************************************
466	*
467	* OpenSerialByName: open the port
468	*
469	*****************************************************************************/
470	status_t OpenSerialByName(int lun, char *dev_name)
471	{
472	struct termios current_termios;
473	int i;
474	int reader = LunToReaderIndex(lun);
475
476	DEBUG_COMM3("Lun: %X, Device: %d", lun, dev_name);
477
478	/* check if the same channel is not already used */
479	for (i=0; i<PCSCLITE_MAX_READERS; i++)
480	{
481	if (serialDevice[i].device &&
482	strcmp(serialDevice[i].device, dev_name) == 0)
483	{
484	DEBUG_CRITICAL2("Device %s already in use", dev_name);
485	return STATUS_UNSUCCESSFUL;
486	}
487	}
488
489	serialDevice[reader].fd = open(dev_name, O_RDWR \| O_NOCTTY);
490
491	if (serialDevice[reader].fd <= 0)
492	{
493	DEBUG_CRITICAL3("open %s: %s", dev_name, strerror(errno));
494	return STATUS_UNSUCCESSFUL;
495	}
496
497	/* set channel used */
498	serialDevice[reader].device = strdup(dev_name);
499
500	/* empty in and out serial buffers */
501	if (tcflush(serialDevice[reader].fd, TCIOFLUSH))
502	DEBUG_INFO2("tcflush() function error: %s", strerror(errno));
503
504	/* get config attributes */
505	if (tcgetattr(serialDevice[reader].fd, &current_termios) == -1)
506	{
507	DEBUG_INFO2("tcgetattr() function error: %s", strerror(errno));
508	close(serialDevice[reader].fd);
509	serialDevice[reader].fd = -1;
510
511	return STATUS_UNSUCCESSFUL;
512	}
513
514	/* IGNBRK: ignore BREAK condition on input
515	* IGNPAR: ignore framing errors and parity errors. */
516	current_termios.c_iflag = IGNBRK \| IGNPAR;
517	current_termios.c_oflag = 0; /* Raw output modes */
518	/* CS8: 8-bits character size
519	* CSTOPB: set two stop bits
520	* CREAD: enable receiver
521	* CLOCAL: ignore modem control lines */
522	current_termios.c_cflag = CS8 \| CSTOPB \| CREAD \| CLOCAL;
523
524	/* Do not echo characters because if you connect to a host it or your modem
525	* will echo characters for you. Don't generate signals. */
526	current_termios.c_lflag = 0;
527
528	/* set serial port speed to 115200 bauds */
529	cfsetspeed(&current_termios, B115200);
530
531	DEBUG_INFO("Set serial port baudrate to 115200 and correct configuration");
532	if (tcsetattr(serialDevice[reader].fd, TCSANOW, &current_termios) == -1)
533	{
534	close(serialDevice[reader].fd);
535	serialDevice[reader].fd = -1;
536	DEBUG_INFO2("tcsetattr error: %s", strerror(errno));
537
538	return STATUS_UNSUCCESSFUL;
539	}
540
541	serialDevice[reader].ccid.bSeq = 0;
542	serialDevice[reader].ccid.readerID = GEMPCTWIN;
543	serialDevice[reader].ccid.dwMaxCCIDMessageLength = 271;
544	serialDevice[reader].ccid.dwMaxIFSD = 254;
545	serialDevice[reader].ccid.dwFeatures = 0x00010230;
546	serialDevice[reader].ccid.dwDefaultClock = 4000;
547	serialDevice[reader].ccid.dwMaxDataRate = 344086;
548
549	serialDevice[reader].buffer_offset = 0;
550	serialDevice[reader].buffer_offset_last = 0;
551
552	return STATUS_SUCCESS;
553	} /* OpenSerialByName */
554
555
556	/*****************************************************************************
557	*
558	* CloseSerial: close the port
559	*
560	*****************************************************************************/
561	status_t CloseSerial(int lun)
562	{
563	int reader = LunToReaderIndex(lun);
564
565	close(serialDevice[reader].fd);
566	serialDevice[reader].fd = -1;
567
568	free(serialDevice[reader].device);
569	serialDevice[reader].device = NULL;
570
571	return STATUS_SUCCESS;
572	} /* CloseSerial */
573
574
575	/*****************************************************************************
576	*
577	* get_ccid_descriptor
578	*
579	****************************************************************************/
580	_ccid_descriptor *get_ccid_descriptor(int lun)
581	{
582	return &serialDevice[LunToReaderIndex(lun)].ccid;
583	} /* get_ccid_descriptor */
584
585
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svn:keywords	Author Date Id Revision