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