| 1 |
''' |
| 2 |
''' Copyright (C) 2003 INRIA |
| 3 |
''' |
| 4 |
''' INRIA |
| 5 |
''' Domaine de Voluceau |
| 6 |
''' Rocquencourt - B.P. 105 |
| 7 |
''' 78153 Le Chesnay Cedex - France |
| 8 |
''' |
| 9 |
''' This program is free software; you can redistribute it and/or modify |
| 10 |
''' it under the terms of the GNU General Public License as published by |
| 11 |
''' the Free Software Foundation; either version 2 of the License, or |
| 12 |
''' (at your option) any later version. |
| 13 |
''' |
| 14 |
''' This program is distributed in the hope that it will be useful, |
| 15 |
''' but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 |
''' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 |
''' GNU General Public License for more details. |
| 18 |
''' |
| 19 |
''' You should have received a copy of the GNU General Public License |
| 20 |
''' along with this program; if not, write to the Free Software |
| 21 |
''' Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 22 |
''' |
| 23 |
''' Author: Loic Dachary <loic@gnu.org> |
| 24 |
''' |
| 25 |
.TH rfid 3 local |
| 26 |
.SH NAME |
| 27 |
rfid \- API to interact with RFID transponders (version @VERSION@) |
| 28 |
|
| 29 |
.SH SYNOPSIS |
| 30 |
.nf |
| 31 |
.ft CW |
| 32 |
#include <rfid.h> |
| 33 |
|
| 34 |
int rfid_init(rfid_t* rfid, const char* drivers); |
| 35 |
typedef int rfid_transponder_callback_t(rfid_t* rfid, |
| 36 |
int event, |
| 37 |
const rfid_transponder_t* transponder, |
| 38 |
void* data); |
| 39 |
typedef int rfid_inventory_callback_t(rfid_t* rfid, |
| 40 |
rfid_transponder_t** transponders, |
| 41 |
int transponders_length, |
| 42 |
void* data) |
| 43 |
int rfid_event_loop(rfid_t* rfid, int events_mask, |
| 44 |
rfid_transponder_callback_t* transponder_callback, |
| 45 |
rfid_inventory_callback_t* inventory_callback, |
| 46 |
void* data); |
| 47 |
int rfid_write(rfid_t* rfid, rfid_transponder_t* transponder); |
| 48 |
void rfid_end(rfid_t* rfid); |
| 49 |
|
| 50 |
rfid_transponder_t* rfid_transponder_alloc(rfid_t* rfid); |
| 51 |
void rfid_transponder_free(rfid_t* rfid, rfid_transponder_t* transponder); |
| 52 |
char* rfid_transponder_describe(rfid_t* rfid, rfid_transponder_t* transponder); |
| 53 |
int rfid_transponder_id_get(rfid_t* rfid, |
| 54 |
const rfid_transponder_t* transponder, |
| 55 |
char** idp); |
| 56 |
int rfid_transponder_id_set(rfid_t* rfid, |
| 57 |
rfid_transponder_t* transponder, |
| 58 |
char* id); |
| 59 |
|
| 60 |
char* rfid_strerror(rfid_t* rfid); |
| 61 |
int rfid_error(rfid_t* rfid); |
| 62 |
|
| 63 |
void rfid_options(rfid_t* rfid, int value); /* Macro */ |
| 64 |
const char* rfid_version(void); |
| 65 |
.ft R |
| 66 |
.fi |
| 67 |
|
| 68 |
.SH HELP MAKE RFID USELESS TO BIG BROTHER |
| 69 |
|
| 70 |
The RFID technology is an essential component to implement a world of |
| 71 |
total control. Unless citizens and scientists require safeguards, it |
| 72 |
can be used by corporations or governments to track and record about |
| 73 |
everything. At present (May 2003), this issue is not addressed at all: |
| 74 |
corporations are allowed to include RFID tags in any objects they like |
| 75 |
and citizens have no way to get rid of them. The standard used to |
| 76 |
dialog with a RFID tag (ISO-15693) does not even provide a way to |
| 77 |
permanently shut it down. |
| 78 |
|
| 79 |
We strongly encourage every citizen, company or government to require |
| 80 |
that industry standards are modified to implement safeguards designed |
| 81 |
to protect the privacy of citizens. Statements should be sent to the |
| 82 |
standardization group (http://www.wg8.de/) but there is no open |
| 83 |
mailing list for this group. The editor of ISO-15693-3 is Alain |
| 84 |
Berthon (a-berthon@ti.com). The webmaster of wg8.de and the editor of |
| 85 |
ISO-14443-2 is Michael Hegenbarth (michael@hegenbarth.com). The |
| 86 |
statements sent should be friendly : the editors of the standards are |
| 87 |
our allies, not our enemies. The editors could use well written |
| 88 |
statements to push for functionalities protecting privacy but |
| 89 |
aggressive letters would be useless to them. Please cc: every |
| 90 |
statement to the rfid-privacy@nongnu.org public mailing list for |
| 91 |
archive (http://mail.nongnu.org/archive/html/rfid-privacy/) |
| 92 |
|
| 93 |
The "RFID tags: Big Brother in small packages" article by Declan |
| 94 |
McCullagh (http://news.com.com/2010-1069-980325.html) is good |
| 95 |
introduction to the problem. The conclusion is as follows: "First, |
| 96 |
consumers should be notified--a notice on a checkout receipt would |
| 97 |
work--when RFID tags are present in what they're buying. Second, RFID |
| 98 |
tags should be disabled by default at the checkout counter. Third, |
| 99 |
RFID tags should be placed on the product's packaging instead of on |
| 100 |
the product when possible. Fourth, RFID tags should be readily visible |
| 101 |
and easily removable." |
| 102 |
|
| 103 |
.SH DESCRIPTION |
| 104 |
|
| 105 |
.I rfid |
| 106 |
implements an API to interact with RFID transponders thru a RFID |
| 107 |
reader. The caller can monitor the state of the RFID reader and |
| 108 |
ask for callback functions to be called whenever an event occur (RFID |
| 109 |
transponder entering the range of the RFID reader etc.). The caller |
| 110 |
can also write or read the memory area of a RFID transponder. |
| 111 |
|
| 112 |
.I rfid |
| 113 |
relies on a driver to talk to the RFID reader. The set of |
| 114 |
drivers to be used is defined by a string such as |
| 115 |
.B "s6350" |
| 116 |
or |
| 117 |
.B "iso15693/s6350" |
| 118 |
that will be interpreted by the |
| 119 |
.I rfid_init |
| 120 |
function to dynamically load the appropriate modules. |
| 121 |
|
| 122 |
Each driver implements |
| 123 |
an abstract interface ( |
| 124 |
.I rfid_reader(3) |
| 125 |
) and |
| 126 |
.I rfid |
| 127 |
will use this interface to talk to it. The purpose of the |
| 128 |
.I rfid_reader(3) |
| 129 |
interface is to isolate |
| 130 |
.I rfid |
| 131 |
from driver changes. In the following scheme we see that |
| 132 |
.I rfid |
| 133 |
talks to the |
| 134 |
.I iso15693(3) |
| 135 |
RFID reader driver or the |
| 136 |
.I s6350(3) |
| 137 |
RFID reader driver using the same |
| 138 |
.I rfid_reader(3) |
| 139 |
interface. The scheme also shows that |
| 140 |
.I iso15693(3) |
| 141 |
is based on the |
| 142 |
.I s6350(3) |
| 143 |
but this is transparent to |
| 144 |
.I rfid. |
| 145 |
An application can use |
| 146 |
the |
| 147 |
.I rfid_reader(3) |
| 148 |
API instead of the higher level |
| 149 |
.I rfid |
| 150 |
API. It can also use the driver API (such as |
| 151 |
.I s6350(3)) |
| 152 |
but doing so |
| 153 |
means it will be bound to that specific driver which |
| 154 |
may be a drawback for maintainance. |
| 155 |
|
| 156 |
.nf |
| 157 |
.ft CW |
| 158 |
+----------------+ |
| 159 |
| Application | |
| 160 |
+-------+--------+ |
| 161 |
+-------+--------+ |
| 162 |
| rfid(3) | |
| 163 |
+-------+--------+ |
| 164 |
+-------+--------+ |
| 165 |
+---------| rfid_reader(3) +---+ |
| 166 |
| +--------+-------+ | |
| 167 |
| | | |
| 168 |
| | | |
| 169 |
+-----+-------+ +---+----+ +----+----+ |
| 170 |
| iso15693(3) | |m2xxh(3)| | s6350(3)| |
| 171 |
+-v--------v--+ +---+----+ +----+----+ |
| 172 |
| | | | |
| 173 |
+-----+---+ +--+------+ | | |
| 174 |
| s6350(3)| | m2xxh(3)| | | |
| 175 |
+-----v---+ +--v------+ | | |
| 176 |
| | | | |
| 177 |
| | | | |
| 178 |
+-->v<---+ | | |
| 179 |
| +--------+----+ | |
| 180 |
+---------+ RFID reader +------+ |
| 181 |
+-------------+ |
| 182 |
.ft R |
| 183 |
.fi |
| 184 |
|
| 185 |
.I rfid |
| 186 |
is thread safe, except for the |
| 187 |
.I rfid_init |
| 188 |
function and blocks signals (INT, QUIT, TERM) while |
| 189 |
communicating with the RFID reader to ensure that an interrupt will |
| 190 |
not leave the RFID reader in an undefined state. |
| 191 |
|
| 192 |
.SH FUNCTIONS |
| 193 |
|
| 194 |
.TP |
| 195 |
.B int rfid_init(rfid_t* rfid, const char* drivers) |
| 196 |
|
| 197 |
Load the drivers specified by the |
| 198 |
.B drivers |
| 199 |
argument. It can have one of the following values: "s6350", "m2xxh", |
| 200 |
"iso15693/s6350", "iso15693/m2xxh". In addition, if a driver is |
| 201 |
provided by a third party, specifying "otherdriver" will look for |
| 202 |
.I /usr/lib/rfid/libotherdriver.la |
| 203 |
or any similar file in the path defined by the |
| 204 |
.I LTDL_LIBRARY_PATH |
| 205 |
environment variable. |
| 206 |
|
| 207 |
The initialization function of the driver is then called. |
| 208 |
|
| 209 |
The |
| 210 |
.I rfid->io.device |
| 211 |
string must be set to a valid URL describing the device used |
| 212 |
to access the RFID reader. It must be a TTY device and values |
| 213 |
such as |
| 214 |
.I /dev/ttyS0 |
| 215 |
or |
| 216 |
.I /dev/ttyUSB0 |
| 217 |
are valid examples. |
| 218 |
|
| 219 |
Error codes: |
| 220 |
|
| 221 |
.B EINVAL |
| 222 |
rfid->io.device is NULL. |
| 223 |
|
| 224 |
.B ENOTTY |
| 225 |
rfid->io.device is not a tty. |
| 226 |
|
| 227 |
.B ENOEXEC |
| 228 |
RFID reader firmware is not loaded (s6350 only). |
| 229 |
|
| 230 |
.TP |
| 231 |
.B int rfid_event_loop(rfid_t* rfid, int events_mask, rfid_transponder_callback_t* transponder_callback, rfid_inventory_callback_t* inventory_callback, void* data) |
| 232 |
|
| 233 |
Infinite loop polling the RFID reader. The |
| 234 |
.I events_mask |
| 235 |
argument controls |
| 236 |
the calls to the |
| 237 |
.I transponder_callback |
| 238 |
and |
| 239 |
.I inventory_callback |
| 240 |
functions. |
| 241 |
If the |
| 242 |
.I RFID_EVENT_NEW |
| 243 |
or |
| 244 |
.I RFID_EVENT_DELETE |
| 245 |
or |
| 246 |
.I RFID_EVENT_AGAIN |
| 247 |
bits are |
| 248 |
set, the |
| 249 |
.I transponder_callback |
| 250 |
function will be called. If the |
| 251 |
.I RFID_EVENT_INVENTORY |
| 252 |
bit is set, the |
| 253 |
.I inventory_callback |
| 254 |
function will be |
| 255 |
called at the end of each iteration. |
| 256 |
|
| 257 |
An iteration starts with a full inventory of the RFID transponders |
| 258 |
currently in the range of the RFID reader. This inventory is compared |
| 259 |
to the previous inventory in order to figure out which RFID |
| 260 |
transponders just entered the range of the RFID reader |
| 261 |
(RFID_EVENT_NEW), which RFID transponders just left the range of the |
| 262 |
RFID reader (RFID_EVENT_DELETE) and which RFID transponders are still |
| 263 |
in the range of the RFID reader (RFID_EVENT_AGAIN). When this |
| 264 |
comparison is finished and all callbacks have been called, the |
| 265 |
iteration is over. |
| 266 |
|
| 267 |
The |
| 268 |
.I data |
| 269 |
argument is an opaque pointer that is passed to the callback functions. |
| 270 |
|
| 271 |
The complete list of macros that can be used to set the |
| 272 |
.I event_mask |
| 273 |
argument follows: |
| 274 |
|
| 275 |
.nf |
| 276 |
.ft CW |
| 277 |
#define RFID_EVENT_NEW 0x01 |
| 278 |
#define RFID_EVENT_DELETE 0x02 |
| 279 |
#define RFID_EVENT_AGAIN 0x04 |
| 280 |
#define RFID_EVENT_INVENTORY 0x08 |
| 281 |
#define RFID_EVENT_ALL 0xFF |
| 282 |
#define RFID_EVENT_NONE 0x00 |
| 283 |
.ft R |
| 284 |
.fi |
| 285 |
|
| 286 |
The |
| 287 |
.I transponder_callback |
| 288 |
function has the following prototype: |
| 289 |
|
| 290 |
.nf |
| 291 |
.ft CW |
| 292 |
typedef int rfid_transponder_callback_t(rfid_t* rfid, |
| 293 |
int event, |
| 294 |
const rfid_transponder_t* transponder, |
| 295 |
void* data); |
| 296 |
.ft R |
| 297 |
.fi |
| 298 |
|
| 299 |
The |
| 300 |
.I event |
| 301 |
argument is set to |
| 302 |
.I RFID_EVENT_NEW |
| 303 |
or |
| 304 |
.I RFID_EVENT_DELETE |
| 305 |
or |
| 306 |
.I RFID_EVENT_AGAIN |
| 307 |
depending on the event that triggered the call. The |
| 308 |
.I transponder |
| 309 |
argument has the following structure: |
| 310 |
|
| 311 |
.nf |
| 312 |
.ft CW |
| 313 |
typedef struct { |
| 314 |
u_int8_t data[RFID_TRANSPONDER_DATA_SIZE + 1]; /* + 1 for trailing NULL */ |
| 315 |
int data_length; /* Length of data in the |
| 316 |
data field. */ |
| 317 |
} rfid_transponder_t; |
| 318 |
.ft R |
| 319 |
.fi |
| 320 |
|
| 321 |
The |
| 322 |
.I data |
| 323 |
argument is an opaque pointer equal to the |
| 324 |
.I data |
| 325 |
argument of the |
| 326 |
.I rfid_event_loop |
| 327 |
function. |
| 328 |
|
| 329 |
The |
| 330 |
.I inventory_callback |
| 331 |
function has the following prototype: |
| 332 |
|
| 333 |
.nf |
| 334 |
.ft CW |
| 335 |
typedef int rfid_inventory_callback_t(rfid_t* rfid, |
| 336 |
rfid_transponder_t** transponders, |
| 337 |
int transponders_length, |
| 338 |
void* data) |
| 339 |
.ft R |
| 340 |
.fi |
| 341 |
|
| 342 |
The |
| 343 |
.I transponders |
| 344 |
argument is an array of pointers to |
| 345 |
.I rfid_transponder_t |
| 346 |
objects and the |
| 347 |
.I transponders_length |
| 348 |
is the number of pointers in the array. |
| 349 |
|
| 350 |
The |
| 351 |
.I data |
| 352 |
argument is an opaque pointer equal to the |
| 353 |
.I data |
| 354 |
argument of the |
| 355 |
.I rfid_event_loop |
| 356 |
function. |
| 357 |
|
| 358 |
The callback functions (either |
| 359 |
.I transponder_callback |
| 360 |
or |
| 361 |
.I inventory_callback |
| 362 |
functions) must return one of the following: |
| 363 |
|
| 364 |
.B RFID_CALLBACK_OK |
| 365 |
The callback succeeded and |
| 366 |
.I rfid_event_loop |
| 367 |
must continue to poll the RFID reader. |
| 368 |
|
| 369 |
.B RFID_CALLBACK_END |
| 370 |
The callback succeeded and |
| 371 |
.I rfid_event_loop |
| 372 |
must stop polling the RFID reader and return success. |
| 373 |
|
| 374 |
.B RFID_CALLBACK_ERROR |
| 375 |
The callback failed and |
| 376 |
.I rfid_event_loop |
| 377 |
must stop polling the RFID reader and return failure. |
| 378 |
|
| 379 |
.TP |
| 380 |
.B int rfid_write(rfid_t* rfid, rfid_transponder_t* transponder) |
| 381 |
|
| 382 |
Write |
| 383 |
.B transponder->data_length |
| 384 |
bytes from |
| 385 |
.B transponder->data |
| 386 |
to a RFID transponder. If no RFID transponder is available, the |
| 387 |
.I rfid_write |
| 388 |
function will wait for a RFID transponder to become available. |
| 389 |
|
| 390 |
If the |
| 391 |
.I transponder |
| 392 |
unique identifier is set |
| 393 |
(presumably because the |
| 394 |
.I transponder |
| 395 |
was obtained by |
| 396 |
.I rfid_event_loop |
| 397 |
or because the caller used |
| 398 |
.I rfid_transponder_id_set) |
| 399 |
the |
| 400 |
.I rfid_write |
| 401 |
function will fail if the RFID transponder presented to the |
| 402 |
RFID reader does not match. If the |
| 403 |
.I transponder |
| 404 |
unique identifier is not set, the data is written to whatever |
| 405 |
RFID transponder is in the range of the RFID reader. |
| 406 |
|
| 407 |
.nf |
| 408 |
.ft CW |
| 409 |
typedef struct { |
| 410 |
u_int8_t data[RFID_TRANSPONDER_DATA_SIZE + 1]; /* + 1 for trailing |
| 411 |
NULL */ |
| 412 |
int data_length; /* Length of data in the |
| 413 |
data field. */ |
| 414 |
} rfid_transponder_t; |
| 415 |
.ft R |
| 416 |
.fi |
| 417 |
|
| 418 |
Error codes: |
| 419 |
|
| 420 |
.B EXDEV |
| 421 |
RFID transponder presented to the RFID reader does not match the |
| 422 |
identity specified in |
| 423 |
.I transponder->info. |
| 424 |
|
| 425 |
.TP |
| 426 |
.B rfid_transponder_t* rfid_transponder_alloc(rfid_t* rfid) |
| 427 |
|
| 428 |
Return a new |
| 429 |
.I rfid_transponder_t |
| 430 |
object. |
| 431 |
|
| 432 |
It is the responsibility of the caller to free the |
| 433 |
object using |
| 434 |
.I rfid_transponder_free. |
| 435 |
|
| 436 |
.TP |
| 437 |
.B void rfid_transponder_free(rfid_t* rfid, rfid_transponder_t* transponder) |
| 438 |
|
| 439 |
Free |
| 440 |
.I transponder |
| 441 |
previously allocated by |
| 442 |
.I rfid_transponder_alloc. |
| 443 |
|
| 444 |
.TP |
| 445 |
.B char* rfid_transponder_describe(rfid_t* rfid, rfid_transponder_t* transponder) |
| 446 |
|
| 447 |
Return a malloc'ed string containing a null terminated human readable |
| 448 |
description of the |
| 449 |
.I transponder |
| 450 |
argument. |
| 451 |
|
| 452 |
It is the responsibility of the caller to |
| 453 |
.I free(3) |
| 454 |
the returned string. |
| 455 |
|
| 456 |
.TP |
| 457 |
.B int rfid_transponder_id_get(rfid_t* rfid, const rfid_transponder_t* transponder, char** idp) |
| 458 |
Return a null terminated string containing an ascii representation of the |
| 459 |
unique identifier of the |
| 460 |
.I transponder |
| 461 |
argument. |
| 462 |
|
| 463 |
The string is malloc'ed and returned in the |
| 464 |
.I *idp |
| 465 |
argument. |
| 466 |
|
| 467 |
It is the responsibility of the caller to |
| 468 |
.I free(3) |
| 469 |
the returned string. |
| 470 |
|
| 471 |
.TP |
| 472 |
.B int rfid_transponder_id_set(rfid_t* rfid, rfid_transponder_t* transponder, char* id) |
| 473 |
|
| 474 |
Set the unique identifier of the |
| 475 |
.I tranponder |
| 476 |
from the ascii representation provided in the null terminated string |
| 477 |
.I id. |
| 478 |
|
| 479 |
.TP |
| 480 |
.B char* rfid_strerror(rfid_t* rfid) |
| 481 |
|
| 482 |
Return a string describing the last error. It is the responsibility |
| 483 |
of the caller to |
| 484 |
.I free(3) |
| 485 |
the returned string. |
| 486 |
|
| 487 |
.TP |
| 488 |
.B int rfid_error(rfid_t* rfid) |
| 489 |
|
| 490 |
Return the latest error number. All error numbers are |
| 491 |
.I errno(3) |
| 492 |
error numbers whose semantic is described in the corresponding |
| 493 |
function description. |
| 494 |
|
| 495 |
.TP |
| 496 |
.B void rfid_options(rfid_t* rfid, int value) |
| 497 |
|
| 498 |
Set the options of the |
| 499 |
.I rfid |
| 500 |
library to |
| 501 |
.B value. |
| 502 |
|
| 503 |
Options are bits that can be or'ed together and that modify |
| 504 |
the behaviour of some functions as shown below: |
| 505 |
|
| 506 |
.B RFID_OPTION_DUMP_FRAMES: |
| 507 |
print each RFID reader command and response to |
| 508 |
stderr. |
| 509 |
|
| 510 |
.TP |
| 511 |
.B const char* rfid_version(void) |
| 512 |
|
| 513 |
Return the version number of the library, as a string. For |
| 514 |
instance "1.0.0". |
| 515 |
|
| 516 |
.SH SIGNALS |
| 517 |
|
| 518 |
SIGTERM, SIGQUIT and SIGINT are blocked while talking to the RFID |
| 519 |
reader. Signals are only blocked during a limited amount of time, |
| 520 |
to ensure that the RFID reader will not receive a truncated |
| 521 |
frame and that responses are read in full. Signals are blocked, not |
| 522 |
ignored. They will be delivered as soon as the |
| 523 |
.I rfid |
| 524 |
library function is finished. |
| 525 |
|
| 526 |
.SH DEBUG |
| 527 |
|
| 528 |
If the |
| 529 |
.B rfid->verbose |
| 530 |
is set to 1, |
| 531 |
.I rfid |
| 532 |
functions will print debugging information on the error output (stderr). |
| 533 |
The meaning of the debug characters is as follows: |
| 534 |
|
| 535 |
.B . (dot) |
| 536 |
Waiting for a specific RFID transponder to |
| 537 |
enter the range of the RFID reader. |
| 538 |
|
| 539 |
.B N |
| 540 |
A RFID transponder entered the range of the RFID reader. |
| 541 |
|
| 542 |
.B W |
| 543 |
A RFID transponder was successfully written. |
| 544 |
|
| 545 |
.B ! (bang) |
| 546 |
A recoverable communication error occurred with the RFID reader. |
| 547 |
|
| 548 |
.B A |
| 549 |
A RFID transponder that was previously reported to enter |
| 550 |
the range of the RFID reader is still present. |
| 551 |
|
| 552 |
.B D |
| 553 |
A RFID transponder left the range of the RFID transponder. |
| 554 |
|
| 555 |
.B / (slash) |
| 556 |
End of a |
| 557 |
.I rfid_event_loop |
| 558 |
iteration loop. |
| 559 |
|
| 560 |
.SH RETURN VALUES |
| 561 |
|
| 562 |
All functions returning an |
| 563 |
.I int |
| 564 |
will return 0 on success and -1 on |
| 565 |
error. If an error occurs, the error number is avaible thru the |
| 566 |
.I rfid_error |
| 567 |
function. The |
| 568 |
.I rfid_strerror |
| 569 |
function translates the error number into a human readable string. |
| 570 |
|
| 571 |
.SH SEE ALSO |
| 572 |
rfid_commander(1), rfid_reader(3), iso15693(3), s6350(3), m2xxh(3), errno(2) |
| 573 |
.nf |
| 574 |
.ft CW |
| 575 |
http://www.rfidwizards.com/ |
| 576 |
.ft R |
| 577 |
.fi |
| 578 |
|
| 579 |
.SH AUTHOR |
| 580 |
Copyright holder: INRIA, Domaine de Voluceau, Rocquencourt - B.P. 105, 78153 Le Chesnay Cedex - France |
| 581 |
|
| 582 |
Loic Dachary loic@gnu.org |
| 583 |
.nf |
| 584 |
.ft CW |
| 585 |
http://nongnu.org/projects/rfid/ |
| 586 |
.ft R |
| 587 |
.fi |