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 "defs.h"
#include "ccid_ifdhandler.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"

/* no need to initialize to 0 since it is static */
static _serialDevice serialDevice[PCSCLITE_MAX_READERS];

/*****************************************************************************
 * 
 *                              WriteSerial: Send bytes to the card reader
 *
 *****************************************************************************/
status_t WriteSerial(int lun, unsigned 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, unsigned 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);

        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 (-1 == serialDevice[reader].fd)
        {
                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	rousseau	414	/*
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	rousseau	877	#include "defs.h"
37			#include "ccid_ifdhandler.h"
38	rousseau	414	#include "config.h"
39			#include "debug.h"
40			#include "ccid.h"
41			#include "utils.h"
42
43			/* communication timeout in seconds */
44	rousseau	453	#define SERIAL_TIMEOUT 2
45	rousseau	414
46			#define SYNC 0x03
47			#define CTRL_ACK 0x06
48			#define CTRL_NAK 0x15
49			#define RDR_to_PC_NotifySlotChange 0x50
50			#define CARD_ABSENT 0x02
51			#define CARD_PRESENT 0x03
52
53			/*
54			* normal command:
55			* 1 : SYNC
56			* 1 : CTRL
57			* 10 +data length : CCID command
58			* 1 : LRC
59			*
60			* SYNC : 0x03
61			* CTRL : ACK (0x06) or NAK (0x15)
62			* CCID command : see USB CCID specs
63			* LRC : xor of all the previous byes
64			*
65			* Error message:
66			* 1 : SYNC (0x03)
67			* 1 : CTRL (NAK: 0x15)
68			* 1 : LRC (0x16)
69			*
70			* Card insertion/withdrawal
71			* 1 : RDR_to_PC_NotifySlotChange (0x50)
72			* 1 : bmSlotIccState
73			* 0x02 if card absent
74			* 0x03 is card present
75			*
76			* Time request
77			* T=1 : normal CCID command
78			* T=0 : 1 byte (value between 0x80 and 0xFF)
79			*
80			*/
81
82	rousseau	453	/*
83			* You may get read timeout after a card movement.
84			* This is because you will get the echo of the CCID command
85			* but not the result of the command.
86			*
87			* This is not an applicative issue since the card is either removed (and
88			* powered off) or just inserted (and not yet powered on).
89			*/
90
91			/* 271 = max size for short APDU
92			* 2 bytes for header
93			* 1 byte checksum
94			* doubled for echo
95			*/
96			#define GEMPCTWIN_MAXBUF (271 +2 +1) * 2
97
98	rousseau	414	typedef struct
99			{
100			/*
101			* File handle on the serial port
102			*/
103			int fd;
104
105			/*
106	rousseau	649	* device used ("/dev/ttyS?" under Linux)
107	rousseau	414	*/
108	rousseau	649	char *device;
109	rousseau	414
110			/*
111	rousseau	453	* serial communication buffer
112			*/
113			unsigned char buffer[GEMPCTWIN_MAXBUF];
114
115			/*
116			* next available byte
117			*/
118			int buffer_offset;
119
120			/*
121			* number of available bytes
122			*/
123			int buffer_offset_last;
124
125			/*
126	rousseau	414	* CCID infos common to USB and serial
127			*/
128			_ccid_descriptor ccid;
129
130			} _serialDevice;
131
132			/* The _serialDevice structure must be defined before including ccid_serial.h */
133			#include "ccid_serial.h"
134
135	rousseau	892	/* no need to initialize to 0 since it is static */
136			static _serialDevice serialDevice[PCSCLITE_MAX_READERS];
137	rousseau	414
138			/*****************************************************************************
139			*
140			* WriteSerial: Send bytes to the card reader
141			*
142			*****************************************************************************/
143	rousseau	892	status_t WriteSerial(int lun, unsigned int length, unsigned char *buffer)
144	rousseau	414	{
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	rousseau	608	DEBUG_CRITICAL3("command too long: %d for max %d",
158	rousseau	414	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	rousseau	453	if (write(serialDevice[LunToReaderIndex(lun)].fd, low_level_buffer,
180			length+3) != length+3)
181	rousseau	414	{
182	rousseau	608	DEBUG_CRITICAL2("write error: %s", strerror(errno));
183	rousseau	414	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	rousseau	892	status_t ReadSerial(int lun, unsigned int length, unsigned char buffer)
196	rousseau	414	{
197	rousseau	453	unsigned char c;
198			int rv;
199			int echo;
200			int to_read;
201			int i;
202	rousseau	414
203	rousseau	453	/* we get the echo first */
204			echo = TRUE;
205	rousseau	414
206	rousseau	453	start:
207	rousseau	462	DEBUG_COMM("start");
208	rousseau	453	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
209			return rv;
210	rousseau	414
211	rousseau	453	if (c == RDR_to_PC_NotifySlotChange)
212			goto slot_change;
213	rousseau	414
214	rousseau	453	if (c == SYNC)
215			goto sync;
216	rousseau	414
217	rousseau	453	if (c >= 0x80)
218	rousseau	462	{
219			DEBUG_COMM2("time request: 0x%02X", c);
220	rousseau	453	goto start;
221	rousseau	462	}
222	rousseau	414
223	rousseau	453	DEBUG_CRITICAL2("Got 0x%02X", c);
224			return STATUS_COMM_ERROR;
225	rousseau	414
226	rousseau	453	slot_change:
227	rousseau	462	DEBUG_COMM("slot change");
228	rousseau	453	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
229			return rv;
230	rousseau	414
231	rousseau	453	if (c == CARD_ABSENT)
232	rousseau	774	{
233	rousseau	453	DEBUG_COMM("Card removed");
234	rousseau	774	}
235	rousseau	453	else
236			if (c == CARD_PRESENT)
237	rousseau	774	{
238	rousseau	453	DEBUG_COMM("Card inserted");
239	rousseau	774	}
240	rousseau	453	else
241	rousseau	774	{
242	rousseau	453	DEBUG_COMM2("Unknown card movement: %d", buffer[3]);
243	rousseau	774	}
244	rousseau	453	goto start;
245	rousseau	414
246	rousseau	453	sync:
247	rousseau	462	DEBUG_COMM("sync");
248	rousseau	453	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
249			return rv;
250	rousseau	414
251	rousseau	453	if (c == CTRL_ACK)
252			goto ack;
253	rousseau	414
254	rousseau	453	if (c == CTRL_NAK)
255			goto nak;
256	rousseau	414
257	rousseau	453	DEBUG_CRITICAL2("Got 0x%02X instead of ACK/NAK", c);
258			return STATUS_COMM_ERROR;
259	rousseau	414
260	rousseau	453	nak:
261	rousseau	462	DEBUG_COMM("nak");
262	rousseau	453	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
263			return rv;
264	rousseau	414
265	rousseau	453	if (c != (SYNC ^ CTRL_NAK))
266	rousseau	414	{
267	rousseau	453	DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
268			return STATUS_COMM_ERROR;
269	rousseau	414	}
270	rousseau	453	else
271			goto start;
272	rousseau	414
273	rousseau	453	ack:
274	rousseau	462	DEBUG_COMM("ack");
275	rousseau	453	/* normal CCID frame */
276			if ((rv = get_bytes(lun, buffer, 5)) != STATUS_SUCCESS)
277			return rv;
278	rousseau	414
279	rousseau	453	/* total frame size */
280			to_read = 10+dw2i(buffer, 1);
281	rousseau	414
282	rousseau	462	DEBUG_COMM2("frame size: %d", to_read);
283	rousseau	453	if ((rv = get_bytes(lun, buffer+5, to_read-5)) != STATUS_SUCCESS)
284			return rv;
285	rousseau	414
286	rousseau	462	#ifdef DEBUG_LEVEL_COMM
287			DEBUG_XXD("frame: ", buffer, to_read);
288			#endif
289
290	rousseau	453	/* lrc */
291	rousseau	462	DEBUG_COMM("lrc");
292	rousseau	453	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
293			return rv;
294
295	rousseau	462	DEBUG_COMM2("lrc: 0x%02X", c);
296	rousseau	414	for (i=0; i<to_read; i++)
297	rousseau	453	c ^= buffer[i];
298	rousseau	414
299	rousseau	453	if (c != (SYNC ^ CTRL_ACK))
300			DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
301	rousseau	414
302	rousseau	453	if (echo)
303			{
304			echo = FALSE;
305			goto start;
306			}
307	rousseau	414
308			return STATUS_SUCCESS;
309			} /* ReadSerial */
310
311
312			/*****************************************************************************
313			*
314	rousseau	453	* get_bytes: get n bytes
315	rousseau	414	*
316			*****************************************************************************/
317	rousseau	453	int get_bytes(int lun, unsigned char *buffer, int length)
318	rousseau	414	{
319	rousseau	453	int offset = serialDevice[LunToReaderIndex(lun)].buffer_offset;
320			int offset_last = serialDevice[LunToReaderIndex(lun)].buffer_offset_last;
321	rousseau	414
322	rousseau	608	DEBUG_COMM3("available: %d, needed: %d", offset_last-offset,
323	rousseau	462	length);
324	rousseau	453	/* enough data are available */
325			if (offset + length <= offset_last)
326	rousseau	414	{
327	rousseau	608	DEBUG_COMM("data available");
328	rousseau	453	memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset, length);
329			serialDevice[LunToReaderIndex(lun)].buffer_offset += length;
330	rousseau	414	}
331	rousseau	453	else
332	rousseau	414	{
333	rousseau	453	int present, rv;
334	rousseau	414
335	rousseau	453	/* copy available data */
336			present = offset_last - offset;
337	rousseau	414
338	rousseau	453	if (present > 0)
339	rousseau	462	{
340	rousseau	608	DEBUG_COMM2("some data available: %d", present);
341	rousseau	462	memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset,
342			present);
343			}
344	rousseau	414
345	rousseau	453	/* get fresh data */
346	rousseau	608	DEBUG_COMM2("get more data: %d", length - present);
347	rousseau	453	rv = ReadChunk(lun, serialDevice[LunToReaderIndex(lun)].buffer, sizeof(serialDevice[LunToReaderIndex(lun)].buffer), length - present);
348			if (rv < 0)
349			return STATUS_COMM_ERROR;
350	rousseau	414
351	rousseau	453	/* fill the buffer */
352			memcpy(buffer + present, serialDevice[LunToReaderIndex(lun)].buffer,
353			length - present);
354			serialDevice[LunToReaderIndex(lun)].buffer_offset = length - present;
355			serialDevice[LunToReaderIndex(lun)].buffer_offset_last = rv;
356	rousseau	608	DEBUG_COMM3("offset: %d, last_offset: %d",
357	rousseau	462	serialDevice[LunToReaderIndex(lun)].buffer_offset,
358			serialDevice[LunToReaderIndex(lun)].buffer_offset_last);
359	rousseau	414	}
360
361	rousseau	453	return STATUS_SUCCESS;
362			} /* get_bytes */
363	rousseau	414
364	rousseau	453
365	rousseau	414	/*****************************************************************************
366			*
367			* ReadChunk: read a minimum number of bytes
368			*
369			*****************************************************************************/
370	rousseau	453	int ReadChunk(int lun, unsigned char *buffer, int buffer_length, int min_length)
371	rousseau	414	{
372	rousseau	453	int fd = serialDevice[LunToReaderIndex(lun)].fd;
373	rousseau	414	fd_set fdset;
374			struct timeval t;
375	rousseau	462	int i, rv = 0;
376			int already_read;
377	rousseau	414	#ifdef DEBUG_LEVEL_COMM
378			char debug_header[] = "<- 121234 ";
379
380			sprintf(debug_header, "<- %06X ", (int)lun);
381			#endif
382
383	rousseau	462	already_read = 0;
384			while (already_read < min_length)
385			{
386			/* use select() to, eventually, timeout */
387			FD_ZERO(&fdset);
388			FD_SET(fd, &fdset);
389			t.tv_sec = SERIAL_TIMEOUT;
390			t.tv_usec = 0;
391	rousseau	414
392	rousseau	462	i = select(fd+1, &fdset, NULL, NULL, &t);
393			if (i == -1)
394	rousseau	414	{
395	rousseau	462	DEBUG_CRITICAL2("select: %s", strerror(errno));
396	rousseau	414	return -1;
397			}
398	rousseau	462	else
399			if (i == 0)
400			{
401			DEBUG_COMM2("Timeout! (%d sec)", SERIAL_TIMEOUT);
402			return -1;
403			}
404	rousseau	414
405	rousseau	462	rv = read(fd, buffer + already_read, buffer_length - already_read);
406			if (rv < 0)
407			{
408			DEBUG_COMM2("read error: %s", strerror(errno));
409			return -1;
410			}
411	rousseau	414
412	rousseau	453	#ifdef DEBUG_LEVEL_COMM
413	rousseau	462	DEBUG_XXD(debug_header, buffer + already_read, rv);
414	rousseau	453	#endif
415	rousseau	414
416	rousseau	462	already_read += rv;
417	rousseau	608	DEBUG_COMM3("read: %d, to read: %d", already_read,
418	rousseau	414	min_length);
419			}
420
421	rousseau	462	return already_read;
422	rousseau	414	} /* ReadChunk */
423
424
425			/*****************************************************************************
426			*
427			* OpenSerial: open the port
428			*
429			*****************************************************************************/
430			status_t OpenSerial(int lun, int channel)
431			{
432			char dev_name[FILENAME_MAX];
433
434	rousseau	608	DEBUG_COMM3("Lun: %X, Channel: %d", lun, channel);
435	rousseau	414
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	rousseau	649	return OpenSerialByName(lun, dev_name);
460			} /* OpenSerial */
461
462			/*****************************************************************************
463			*
464			* OpenSerialByName: open the port
465			*
466			*****************************************************************************/
467			status_t OpenSerialByName(int lun, char *dev_name)
468			{
469			struct termios current_termios;
470			int i;
471			int reader = LunToReaderIndex(lun);
472
473			DEBUG_COMM3("Lun: %X, Device: %d", lun, dev_name);
474
475	rousseau	414	/* check if the same channel is not already used */
476			for (i=0; i<PCSCLITE_MAX_READERS; i++)
477			{
478	rousseau	649	if (serialDevice[i].device &&
479			strcmp(serialDevice[i].device, dev_name) == 0)
480	rousseau	414	{
481	rousseau	649	DEBUG_CRITICAL2("Device %s already in use", dev_name);
482	rousseau	414	return STATUS_UNSUCCESSFUL;
483			}
484			}
485
486			serialDevice[reader].fd = open(dev_name, O_RDWR \| O_NOCTTY);
487
488	rousseau	892	if (-1 == serialDevice[reader].fd)
489	rousseau	414	{
490			DEBUG_CRITICAL3("open %s: %s", dev_name, strerror(errno));
491			return STATUS_UNSUCCESSFUL;
492			}
493
494			/* set channel used */
495	rousseau	649	serialDevice[reader].device = strdup(dev_name);
496	rousseau	414
497			/* empty in and out serial buffers */
498			if (tcflush(serialDevice[reader].fd, TCIOFLUSH))
499			DEBUG_INFO2("tcflush() function error: %s", strerror(errno));
500
501			/* get config attributes */
502			if (tcgetattr(serialDevice[reader].fd, &current_termios) == -1)
503			{
504			DEBUG_INFO2("tcgetattr() function error: %s", strerror(errno));
505			close(serialDevice[reader].fd);
506			serialDevice[reader].fd = -1;
507
508			return STATUS_UNSUCCESSFUL;
509			}
510
511			/* IGNBRK: ignore BREAK condition on input
512			* IGNPAR: ignore framing errors and parity errors. */
513			current_termios.c_iflag = IGNBRK \| IGNPAR;
514			current_termios.c_oflag = 0; /* Raw output modes */
515			/* CS8: 8-bits character size
516			* CSTOPB: set two stop bits
517			* CREAD: enable receiver
518			* CLOCAL: ignore modem control lines */
519			current_termios.c_cflag = CS8 \| CSTOPB \| CREAD \| CLOCAL;
520
521			/* Do not echo characters because if you connect to a host it or your modem
522			* will echo characters for you. Don't generate signals. */
523			current_termios.c_lflag = 0;
524
525			/* set serial port speed to 115200 bauds */
526			cfsetspeed(&current_termios, B115200);
527
528			DEBUG_INFO("Set serial port baudrate to 115200 and correct configuration");
529			if (tcsetattr(serialDevice[reader].fd, TCSANOW, &current_termios) == -1)
530			{
531			close(serialDevice[reader].fd);
532			serialDevice[reader].fd = -1;
533			DEBUG_INFO2("tcsetattr error: %s", strerror(errno));
534
535			return STATUS_UNSUCCESSFUL;
536			}
537
538			serialDevice[reader].ccid.bSeq = 0;
539			serialDevice[reader].ccid.readerID = GEMPCTWIN;
540			serialDevice[reader].ccid.dwMaxCCIDMessageLength = 271;
541	rousseau	672	serialDevice[reader].ccid.dwMaxIFSD = 254;
542	rousseau	414	serialDevice[reader].ccid.dwFeatures = 0x00010230;
543	rousseau	694	serialDevice[reader].ccid.dwDefaultClock = 4000;
544			serialDevice[reader].ccid.dwMaxDataRate = 344086;
545	rousseau	414
546	rousseau	453	serialDevice[reader].buffer_offset = 0;
547			serialDevice[reader].buffer_offset_last = 0;
548
549	rousseau	414	return STATUS_SUCCESS;
550	rousseau	649	} /* OpenSerialByName */
551	rousseau	414
552
553			/*****************************************************************************
554			*
555			* CloseSerial: close the port
556			*
557			*****************************************************************************/
558			status_t CloseSerial(int lun)
559			{
560			int reader = LunToReaderIndex(lun);
561
562			close(serialDevice[reader].fd);
563			serialDevice[reader].fd = -1;
564
565	rousseau	649	free(serialDevice[reader].device);
566			serialDevice[reader].device = NULL;
567
568	rousseau	414	return STATUS_SUCCESS;
569			} /* CloseSerial */
570
571
572			/*****************************************************************************
573			*
574			* get_ccid_descriptor
575			*
576			****************************************************************************/
577			_ccid_descriptor *get_ccid_descriptor(int lun)
578			{
579			return &serialDevice[LunToReaderIndex(lun)].ccid;
580			} /* get_ccid_descriptor */
581
582
Name	Value
svn:eol-style	native
svn:keywords	Author Date Id Revision