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 <PCSC/ifdhandler.h>

#include "defs.h"
#include "ccid_ifdhandler.h"
#include "config.h"
#include "debug.h"
#include "ccid.h"
#include "utils.h"
#include "commands.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)
         */
        /*@null@*/ 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[CCID_DRIVER_MAX_READERS];

/* unexported functions */
static int ReadChunk(unsigned int lun, unsigned char *buffer, int buffer_length,
        int min_length);

static int get_bytes(unsigned int lun, unsigned char *buffer, int length);


/*****************************************************************************
 * 
 *                              WriteSerial: Send bytes to the card reader
 *
 *****************************************************************************/
status_t WriteSerial(unsigned 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[] = "-> 123456 ";

        sprintf(debug_header, "-> %06X ", 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(unsigned int lun, /*@unused@*/ 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", c);
                }
        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(unsigned 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
 *
 *****************************************************************************/
static int ReadChunk(unsigned int lun, unsigned char *buffer,
        int buffer_length, int min_length)
{
        int fd = serialDevice[LunToReaderIndex(lun)].fd;
# ifndef S_SPLINT_S
        fd_set fdset;
# endif
        struct timeval t;
        int i, rv = 0;
        int already_read;
#ifdef DEBUG_LEVEL_COMM
        char debug_header[] = "<- 123456 ";

        sprintf(debug_header, "<- %06X ", 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(unsigned 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(unsigned int lun, char *dev_name)
{
        struct termios current_termios;
        int i;
        unsigned 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<CCID_DRIVER_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.bPINSupport = 0x0;
        serialDevice[reader].ccid.dwDefaultClock = 4000;
        serialDevice[reader].ccid.dwMaxDataRate = 344086;

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

        /* perform a command to be sure a GemPC Twin reader is connected
         * get the reader firmware */
        {
                unsigned char tx_buffer[] = "\x02";
                unsigned char rx_buffer[50];
                unsigned int rx_length = sizeof(rx_buffer);

                if (IFD_SUCCESS != CmdEscape(lun, tx_buffer, sizeof(tx_buffer),
                        rx_buffer, &rx_length))
                {
                        DEBUG_CRITICAL("Get firmware failed. Maybe the reader is not co,,ected");
                        return STATUS_UNSUCCESSFUL;
                }

                rx_buffer[rx_length] = '\0';
                DEBUG_INFO2("Firmware: %s", rx_buffer);
        }

        return STATUS_SUCCESS;
} /* OpenSerialByName */


/*****************************************************************************
 * 
 *                              CloseSerial: close the port
 *
 *****************************************************************************/
status_t CloseSerial(unsigned int lun)
{
        unsigned 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(unsigned 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	#include <PCSC/ifdhandler.h>
36
37	#include "defs.h"
38	#include "ccid_ifdhandler.h"
39	#include "config.h"
40	#include "debug.h"
41	#include "ccid.h"
42	#include "utils.h"
43	#include "commands.h"
44
45	/* communication timeout in seconds */
46	#define SERIAL_TIMEOUT 2
47
48	#define SYNC 0x03
49	#define CTRL_ACK 0x06
50	#define CTRL_NAK 0x15
51	#define RDR_to_PC_NotifySlotChange 0x50
52	#define CARD_ABSENT 0x02
53	#define CARD_PRESENT 0x03
54
55	/*
56	* normal command:
57	* 1 : SYNC
58	* 1 : CTRL
59	* 10 +data length : CCID command
60	* 1 : LRC
61	*
62	* SYNC : 0x03
63	* CTRL : ACK (0x06) or NAK (0x15)
64	* CCID command : see USB CCID specs
65	* LRC : xor of all the previous byes
66	*
67	* Error message:
68	* 1 : SYNC (0x03)
69	* 1 : CTRL (NAK: 0x15)
70	* 1 : LRC (0x16)
71	*
72	* Card insertion/withdrawal
73	* 1 : RDR_to_PC_NotifySlotChange (0x50)
74	* 1 : bmSlotIccState
75	* 0x02 if card absent
76	* 0x03 is card present
77	*
78	* Time request
79	* T=1 : normal CCID command
80	* T=0 : 1 byte (value between 0x80 and 0xFF)
81	*
82	*/
83
84	/*
85	* You may get read timeout after a card movement.
86	* This is because you will get the echo of the CCID command
87	* but not the result of the command.
88	*
89	* This is not an applicative issue since the card is either removed (and
90	* powered off) or just inserted (and not yet powered on).
91	*/
92
93	/* 271 = max size for short APDU
94	* 2 bytes for header
95	* 1 byte checksum
96	* doubled for echo
97	*/
98	#define GEMPCTWIN_MAXBUF (271 +2 +1) * 2
99
100	typedef struct
101	{
102	/*
103	* File handle on the serial port
104	*/
105	int fd;
106
107	/*
108	* device used ("/dev/ttyS?" under Linux)
109	*/
110	/@null@/ char *device;
111
112	/*
113	* serial communication buffer
114	*/
115	unsigned char buffer[GEMPCTWIN_MAXBUF];
116
117	/*
118	* next available byte
119	*/
120	int buffer_offset;
121
122	/*
123	* number of available bytes
124	*/
125	int buffer_offset_last;
126
127	/*
128	* CCID infos common to USB and serial
129	*/
130	_ccid_descriptor ccid;
131
132	} _serialDevice;
133
134	/* The _serialDevice structure must be defined before including ccid_serial.h */
135	#include "ccid_serial.h"
136
137	/* no need to initialize to 0 since it is static */
138	static _serialDevice serialDevice[CCID_DRIVER_MAX_READERS];
139
140	/* unexported functions */
141	static int ReadChunk(unsigned int lun, unsigned char *buffer, int buffer_length,
142	int min_length);
143
144	static int get_bytes(unsigned int lun, unsigned char *buffer, int length);
145
146
147	/*****************************************************************************
148	*
149	* WriteSerial: Send bytes to the card reader
150	*
151	*****************************************************************************/
152	status_t WriteSerial(unsigned int lun, unsigned int length, unsigned char *buffer)
153	{
154	int i;
155	unsigned char lrc;
156	unsigned char low_level_buffer[GEMPCTWIN_MAXBUF];
157
158	#ifdef DEBUG_LEVEL_COMM
159	char debug_header[] = "-> 123456 ";
160
161	sprintf(debug_header, "-> %06X ", lun);
162	#endif
163
164	if (length > GEMPCTWIN_MAXBUF-3)
165	{
166	DEBUG_CRITICAL3("command too long: %d for max %d",
167	length, GEMPCTWIN_MAXBUF-3);
168	return STATUS_UNSUCCESSFUL;
169	}
170
171	/* header */
172	low_level_buffer[0] = 0x03; /* SYNC */
173	low_level_buffer[1] = 0x06; /* ACK */
174
175	/* CCID command */
176	memcpy(low_level_buffer+2, buffer, length);
177
178	/* checksum */
179	lrc = 0;
180	for(i=0; i<length+2; i++)
181	lrc ^= low_level_buffer[i];
182	low_level_buffer[length+2] = lrc;
183
184	#ifdef DEBUG_LEVEL_COMM
185	DEBUG_XXD(debug_header, low_level_buffer, length+3);
186	#endif
187
188	if (write(serialDevice[LunToReaderIndex(lun)].fd, low_level_buffer,
189	length+3) != length+3)
190	{
191	DEBUG_CRITICAL2("write error: %s", strerror(errno));
192	return STATUS_UNSUCCESSFUL;
193	}
194
195	return STATUS_SUCCESS;
196	} /* WriteSerial */
197
198
199	/*****************************************************************************
200	*
201	* ReadSerial: Receive bytes from the card reader
202	*
203	*****************************************************************************/
204	status_t ReadSerial(unsigned int lun, /@unused@/ unsigned int *length,
205	unsigned char *buffer)
206	{
207	unsigned char c;
208	int rv;
209	int echo;
210	int to_read;
211	int i;
212
213	/* we get the echo first */
214	echo = TRUE;
215
216	start:
217	DEBUG_COMM("start");
218	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
219	return rv;
220
221	if (c == RDR_to_PC_NotifySlotChange)
222	goto slot_change;
223
224	if (c == SYNC)
225	goto sync;
226
227	if (c >= 0x80)
228	{
229	DEBUG_COMM2("time request: 0x%02X", c);
230	goto start;
231	}
232
233	DEBUG_CRITICAL2("Got 0x%02X", c);
234	return STATUS_COMM_ERROR;
235
236	slot_change:
237	DEBUG_COMM("slot change");
238	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
239	return rv;
240
241	if (c == CARD_ABSENT)
242	{
243	DEBUG_COMM("Card removed");
244	}
245	else
246	if (c == CARD_PRESENT)
247	{
248	DEBUG_COMM("Card inserted");
249	}
250	else
251	{
252	DEBUG_COMM2("Unknown card movement: %d", c);
253	}
254	goto start;
255
256	sync:
257	DEBUG_COMM("sync");
258	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
259	return rv;
260
261	if (c == CTRL_ACK)
262	goto ack;
263
264	if (c == CTRL_NAK)
265	goto nak;
266
267	DEBUG_CRITICAL2("Got 0x%02X instead of ACK/NAK", c);
268	return STATUS_COMM_ERROR;
269
270	nak:
271	DEBUG_COMM("nak");
272	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
273	return rv;
274
275	if (c != (SYNC ^ CTRL_NAK))
276	{
277	DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
278	return STATUS_COMM_ERROR;
279	}
280	else
281	goto start;
282
283	ack:
284	DEBUG_COMM("ack");
285	/* normal CCID frame */
286	if ((rv = get_bytes(lun, buffer, 5)) != STATUS_SUCCESS)
287	return rv;
288
289	/* total frame size */
290	to_read = 10+dw2i(buffer, 1);
291
292	DEBUG_COMM2("frame size: %d", to_read);
293	if ((rv = get_bytes(lun, buffer+5, to_read-5)) != STATUS_SUCCESS)
294	return rv;
295
296	#ifdef DEBUG_LEVEL_COMM
297	DEBUG_XXD("frame: ", buffer, to_read);
298	#endif
299
300	/* lrc */
301	DEBUG_COMM("lrc");
302	if ((rv = get_bytes(lun, &c, 1)) != STATUS_SUCCESS)
303	return rv;
304
305	DEBUG_COMM2("lrc: 0x%02X", c);
306	for (i=0; i<to_read; i++)
307	c ^= buffer[i];
308
309	if (c != (SYNC ^ CTRL_ACK))
310	DEBUG_CRITICAL2("Wrong LRC: 0x%02X", c);
311
312	if (echo)
313	{
314	echo = FALSE;
315	goto start;
316	}
317
318	return STATUS_SUCCESS;
319	} /* ReadSerial */
320
321
322	/*****************************************************************************
323	*
324	* get_bytes: get n bytes
325	*
326	*****************************************************************************/
327	int get_bytes(unsigned int lun, unsigned char *buffer, int length)
328	{
329	int offset = serialDevice[LunToReaderIndex(lun)].buffer_offset;
330	int offset_last = serialDevice[LunToReaderIndex(lun)].buffer_offset_last;
331
332	DEBUG_COMM3("available: %d, needed: %d", offset_last-offset,
333	length);
334	/* enough data are available */
335	if (offset + length <= offset_last)
336	{
337	DEBUG_COMM("data available");
338	memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset, length);
339	serialDevice[LunToReaderIndex(lun)].buffer_offset += length;
340	}
341	else
342	{
343	int present, rv;
344
345	/* copy available data */
346	present = offset_last - offset;
347
348	if (present > 0)
349	{
350	DEBUG_COMM2("some data available: %d", present);
351	memcpy(buffer, serialDevice[LunToReaderIndex(lun)].buffer + offset,
352	present);
353	}
354
355	/* get fresh data */
356	DEBUG_COMM2("get more data: %d", length - present);
357	rv = ReadChunk(lun, serialDevice[LunToReaderIndex(lun)].buffer, sizeof(serialDevice[LunToReaderIndex(lun)].buffer), length - present);
358	if (rv < 0)
359	return STATUS_COMM_ERROR;
360
361	/* fill the buffer */
362	memcpy(buffer + present, serialDevice[LunToReaderIndex(lun)].buffer,
363	length - present);
364	serialDevice[LunToReaderIndex(lun)].buffer_offset = length - present;
365	serialDevice[LunToReaderIndex(lun)].buffer_offset_last = rv;
366	DEBUG_COMM3("offset: %d, last_offset: %d",
367	serialDevice[LunToReaderIndex(lun)].buffer_offset,
368	serialDevice[LunToReaderIndex(lun)].buffer_offset_last);
369	}
370
371	return STATUS_SUCCESS;
372	} /* get_bytes */
373
374
375	/*****************************************************************************
376	*
377	* ReadChunk: read a minimum number of bytes
378	*
379	*****************************************************************************/
380	static int ReadChunk(unsigned int lun, unsigned char *buffer,
381	int buffer_length, int min_length)
382	{
383	int fd = serialDevice[LunToReaderIndex(lun)].fd;
384	# ifndef S_SPLINT_S
385	fd_set fdset;
386	# endif
387	struct timeval t;
388	int i, rv = 0;
389	int already_read;
390	#ifdef DEBUG_LEVEL_COMM
391	char debug_header[] = "<- 123456 ";
392
393	sprintf(debug_header, "<- %06X ", lun);
394	#endif
395
396	already_read = 0;
397	while (already_read < min_length)
398	{
399	/* use select() to, eventually, timeout */
400	FD_ZERO(&fdset);
401	FD_SET(fd, &fdset);
402	t.tv_sec = SERIAL_TIMEOUT;
403	t.tv_usec = 0;
404
405	i = select(fd+1, &fdset, NULL, NULL, &t);
406	if (i == -1)
407	{
408	DEBUG_CRITICAL2("select: %s", strerror(errno));
409	return -1;
410	}
411	else
412	if (i == 0)
413	{
414	DEBUG_COMM2("Timeout! (%d sec)", SERIAL_TIMEOUT);
415	return -1;
416	}
417
418	rv = read(fd, buffer + already_read, buffer_length - already_read);
419	if (rv < 0)
420	{
421	DEBUG_COMM2("read error: %s", strerror(errno));
422	return -1;
423	}
424
425	#ifdef DEBUG_LEVEL_COMM
426	DEBUG_XXD(debug_header, buffer + already_read, rv);
427	#endif
428
429	already_read += rv;
430	DEBUG_COMM3("read: %d, to read: %d", already_read,
431	min_length);
432	}
433
434	return already_read;
435	} /* ReadChunk */
436
437
438	/*****************************************************************************
439	*
440	* OpenSerial: open the port
441	*
442	*****************************************************************************/
443	status_t OpenSerial(unsigned int lun, int channel)
444	{
445	char dev_name[FILENAME_MAX];
446
447	DEBUG_COMM3("Lun: %X, Channel: %d", lun, channel);
448
449	/*
450	* Conversion of old-style ifd-hanler 1.0 CHANNELID
451	*/
452	if (channel == 0x0103F8)
453	channel = 1;
454	else
455	if (channel == 0x0102F8)
456	channel = 2;
457	else
458	if (channel == 0x0103E8)
459	channel = 3;
460	else
461	if (channel == 0x0102E8)
462	channel = 4;
463
464	if (channel < 0)
465	{
466	DEBUG_CRITICAL2("wrong port number: %d", (int) channel);
467	return STATUS_UNSUCCESSFUL;
468	}
469
470	sprintf(dev_name, "/dev/pcsc/%d", (int) channel);
471
472	return OpenSerialByName(lun, dev_name);
473	} /* OpenSerial */
474
475	/*****************************************************************************
476	*
477	* OpenSerialByName: open the port
478	*
479	*****************************************************************************/
480	status_t OpenSerialByName(unsigned int lun, char *dev_name)
481	{
482	struct termios current_termios;
483	int i;
484	unsigned int reader = LunToReaderIndex(lun);
485
486	DEBUG_COMM3("Lun: %X, Device: %d", lun, dev_name);
487
488	/* check if the same channel is not already used */
489	for (i=0; i<CCID_DRIVER_MAX_READERS; i++)
490	{
491	if (serialDevice[i].device &&
492	strcmp(serialDevice[i].device, dev_name) == 0)
493	{
494	DEBUG_CRITICAL2("Device %s already in use", dev_name);
495	return STATUS_UNSUCCESSFUL;
496	}
497	}
498
499	serialDevice[reader].fd = open(dev_name, O_RDWR \| O_NOCTTY);
500
501	if (-1 == serialDevice[reader].fd)
502	{
503	DEBUG_CRITICAL3("open %s: %s", dev_name, strerror(errno));
504	return STATUS_UNSUCCESSFUL;
505	}
506
507	/* set channel used */
508	serialDevice[reader].device = strdup(dev_name);
509
510	/* empty in and out serial buffers */
511	if (tcflush(serialDevice[reader].fd, TCIOFLUSH))
512	DEBUG_INFO2("tcflush() function error: %s", strerror(errno));
513
514	/* get config attributes */
515	if (tcgetattr(serialDevice[reader].fd, &current_termios) == -1)
516	{
517	DEBUG_INFO2("tcgetattr() function error: %s", strerror(errno));
518	close(serialDevice[reader].fd);
519	serialDevice[reader].fd = -1;
520
521	return STATUS_UNSUCCESSFUL;
522	}
523
524	/* IGNBRK: ignore BREAK condition on input
525	* IGNPAR: ignore framing errors and parity errors. */
526	current_termios.c_iflag = IGNBRK \| IGNPAR;
527	current_termios.c_oflag = 0; /* Raw output modes */
528	/* CS8: 8-bits character size
529	* CSTOPB: set two stop bits
530	* CREAD: enable receiver
531	* CLOCAL: ignore modem control lines */
532	current_termios.c_cflag = CS8 \| CSTOPB \| CREAD \| CLOCAL;
533
534	/* Do not echo characters because if you connect to a host it or your modem
535	* will echo characters for you. Don't generate signals. */
536	current_termios.c_lflag = 0;
537
538	/* set serial port speed to 115200 bauds */
539	cfsetspeed(&current_termios, B115200);
540
541	DEBUG_INFO("Set serial port baudrate to 115200 and correct configuration");
542	if (tcsetattr(serialDevice[reader].fd, TCSANOW, &current_termios) == -1)
543	{
544	close(serialDevice[reader].fd);
545	serialDevice[reader].fd = -1;
546	DEBUG_INFO2("tcsetattr error: %s", strerror(errno));
547
548	return STATUS_UNSUCCESSFUL;
549	}
550
551	serialDevice[reader].ccid.bSeq = 0;
552	serialDevice[reader].ccid.readerID = GEMPCTWIN;
553	serialDevice[reader].ccid.dwMaxCCIDMessageLength = 271;
554	serialDevice[reader].ccid.dwMaxIFSD = 254;
555	serialDevice[reader].ccid.dwFeatures = 0x00010230;
556	serialDevice[reader].ccid.bPINSupport = 0x0;
557	serialDevice[reader].ccid.dwDefaultClock = 4000;
558	serialDevice[reader].ccid.dwMaxDataRate = 344086;
559
560	serialDevice[reader].buffer_offset = 0;
561	serialDevice[reader].buffer_offset_last = 0;
562
563	/* perform a command to be sure a GemPC Twin reader is connected
564	* get the reader firmware */
565	{
566	unsigned char tx_buffer[] = "\x02";
567	unsigned char rx_buffer[50];
568	unsigned int rx_length = sizeof(rx_buffer);
569
570	if (IFD_SUCCESS != CmdEscape(lun, tx_buffer, sizeof(tx_buffer),
571	rx_buffer, &rx_length))
572	{
573	DEBUG_CRITICAL("Get firmware failed. Maybe the reader is not co,,ected");
574	return STATUS_UNSUCCESSFUL;
575	}
576
577	rx_buffer[rx_length] = '\0';
578	DEBUG_INFO2("Firmware: %s", rx_buffer);
579	}
580
581	return STATUS_SUCCESS;
582	} /* OpenSerialByName */
583
584
585	/*****************************************************************************
586	*
587	* CloseSerial: close the port
588	*
589	*****************************************************************************/
590	status_t CloseSerial(unsigned int lun)
591	{
592	unsigned int reader = LunToReaderIndex(lun);
593
594	close(serialDevice[reader].fd);
595	serialDevice[reader].fd = -1;
596
597	free(serialDevice[reader].device);
598	serialDevice[reader].device = NULL;
599
600	return STATUS_SUCCESS;
601	} /* CloseSerial */
602
603
604	/*****************************************************************************
605	*
606	* get_ccid_descriptor
607	*
608	****************************************************************************/
609	_ccid_descriptor *get_ccid_descriptor(unsigned int lun)
610	{
611	return &serialDevice[LunToReaderIndex(lun)].ccid;
612	} /* get_ccid_descriptor */
613
614
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svn:keywords	Author Date Id Revision