This file is indexed.

/usr/include/android-22/libnfc-nxp/phLlcNfc_Frame.h is in android-headers-22 23-0ubuntu4.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
/*
 * Copyright (C) 2010 NXP Semiconductors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*!
* \file  phLlcNfc_Frame.h
* \brief To append and delete the I or S or U frames.
*
* Project: NFC-FRI-1.1
*
* $Date: Fri Apr 30 10:03:36 2010 $
* $Author: ing02260 $
* $Revision: 1.19 $
* $Aliases: NFC_FRI1.1_WK1017_R34_1,NFC_FRI1.1_WK1017_R34_2,NFC_FRI1.1_WK1023_R35_1 $
*
*/

#ifndef PHLLCNFC_FRAME_H
#define PHLLCNFC_FRAME_H

/**
*  \name LLC NFC frame creation and deletion
*
* File: \ref phLlcNfc_Frame.h
*
*/
/*@{*/
#define PHLLCNFCFRAME_FILEREVISION "$Revision: 1.19 $" /**< \ingroup grp_hal_nfc_llc */
#define PHLLCNFCFRAME_FILEALIASES   "$Aliases: NFC_FRI1.1_WK1017_R34_1,NFC_FRI1.1_WK1017_R34_2,NFC_FRI1.1_WK1023_R35_1 $"    /**< \ingroup grp_hal_nfc_llc */
/*@}*/

/*************************** Includes *******************************/

/*********************** End of includes ****************************/

/** \defgroup grp_hal_nfc_llc_helper LLC helper functions
 *
 *
 *
 */

/***************************** Macros *******************************/
/** Maximum buffer that LLC can send and receive */
#define PH_LLCNFC_MAX_BUFLEN_RECV_SEND                      (33)
/** Maximum buffer that LLC can send and receive */
#define PH_LLCNFC_MIN_BUFLEN_RECVD                      (1)
/** Modulo to calculate the N(S) and N(R), when it extends 7, because 
    N(S) and N(R) can have the value maximum up to 7 */
#define PH_LLCNFC_MOD_NS_NR                                 (8)
/** When the entire LLC buffer is created or received, the header byte 
    will be the first byte (not the 0th byte which is the LLC length)
    of the buffer */
#define PH_LLCNFC_HEADER_BYTE_IN_BUFFER                     (1)
/** Maximum windows size, which is obtained by sending or 
    receiving the U - frame */
#define PH_LLCNFC_U_FRAME_MAX_WIN_SIZE                      (4)
/** Minimum windows size, which is obtained by sending or 
    receiving the U - frame */
#define PH_LLCNFC_U_FRAME_MIN_WIN_SIZE                      (2)
/** Start position of the U frame */
#define PH_LLCNFC_U_FRAME_START_POS                         (0)
/** No of position to set the U frame */
#define PH_LLCNFC_U_FRAME_NO_OF_POS                         (5)
/** This mask is to find the frame type ( S or U) */
#define PH_LLCNFC_LLC_HEADER_MASK                           (0xE0)
/** This mask is to find the frame type (I, S or U) */
#define PH_LLCNFC_I_FRM_HEADER_MASK                         (0x80)
/** If S frame is received or to be sent, the maximum length that 
    can be sent or received is 4 */
#define PH_LLCNFC_MAX_S_FRAME_LEN                           (4)
/** If S frame is received, to know the command type like RR, RNR, 
    REJ or SREJ */
#define PH_LLCNFC_S_FRAME_TYPE_MASK                         (0x18)
/** Maximum value of N(S) or N(R) */
#define PH_LLCNFC_I_S_FRAME_MAX_NR                          (0x07)
/** If U frame is received or to be sent, the maximum length that 
    can be sent or received is 7 */
#define PH_LLCNFC_U_FRAME_LEN                               (7)
/** If S frame is received, to know the command type like RSET or UA */
#define PH_LLCNFC_U_FRAME_MODIFIER_MASK                     (0x1F)
/** Extra length to be append to the user buffer Length to create the 
    LLC buffer */
#define PH_LLCNFC_LEN_APPEND                                (0x04)
/** U frame header without modifier */
#define PH_LLCNFC_U_HEADER_INIT                             (0xE0)
/** I frame header without N(S) and N(R) */
#define PH_LLCNFC_I_HEADER_INIT                             (0x80)
/** S frame header without type and N(R) */
#define PH_LLCNFC_S_HEADER_INIT                             (0xC0)
/** N(S) start bit position */
#define PH_LLCNFC_NS_START_BIT_POS                          (0x03)
/** N(R) start bit position */
#define PH_LLCNFC_NR_START_BIT_POS                          (0x00)
/** Number of bits N(R) and N(S)  */
#define PH_LLCNFC_NR_NS_NO_OF_BITS                          (0x03)
/** S frame type start bit position */
#define PH_LLCNFC_S_FRAME_TYPE_POS                          (0x03)
/** Number of bits (Type in S frame)  */
#define PH_LLCNFC_SFRAME_TYPE_NOOFBITS                      (0x02)
/** SREJ command */
#define PH_LLCNFC_SREJ_BYTE_VALUE                           (0x00)
/** Number of CRC bytes in a LLC packet */
#define PH_LLCNFC_NUM_OF_CRC_BYTES                          (0x02)

/* This macro is used as the input for the function "phLlcNfc_H_IFrameList_Peek" 
    and "phLlcNfc_H_SendTimedOutIFrame" functions. This values means, take the starting 
    position as the reference */
#define DEFAULT_PACKET_INPUT                                (0xFFU)
#define MAX_NS_NR_VALUE                                     (0x07U)

/************************ End of macros *****************************/

/********************** Callback functions **************************/

/******************* End of Callback functions **********************/

/********************* Structures and enums *************************/

/****************** End of structures and enums *********************/

/******************** Function declarations *************************/
/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC helper functions \b Frame Init function
*
* \copydoc page_reg Gets the LLC main context and stores it.
*
* \param[in] psLlcCtxt  Llc main structure information
*
* \retval NFCSTATUS_SUCCESS                Operation successful.
* \retval NFCSTATUS_INVALID_PARAMETER      At least one parameter of the function is invalid.
*
*/
void phLlcNfc_H_Frame_Init (
    phLlcNfc_Context_t  *psLlcCtxt
);

/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC helper functions \b DeInit function
*
* \copydoc page_reg 
*
* \param[in] psFrameInfo    Frame structure information
*
* \retval NFCSTATUS_SUCCESS                Operation successful.
* \retval NFCSTATUS_INVALID_PARAMETER      At least one parameter of the function is invalid.
*
*/
void 
phLlcNfc_H_Frame_DeInit (
    phLlcNfc_Frame_t    *psFrameInfo
);

/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC helper functions \b List append function
*
* \copydoc page_reg Append the new I frame information at the beginning of the list
*
* \param[in/out] psList     List inofrmation to know where shall the packet should be stored
* \param[in] packetInfo     Llc packet information
*
* \retval NFCSTATUS_SUCCESS                Operation successful.
* \retval NFCSTATUS_INVALID_PARAMETER      At least one parameter of the function is invalid.
*
*/
NFCSTATUS 
phLlcNfc_H_StoreIFrame (
    phLlcNfc_StoreIFrame_t      *psList,
    phLlcNfc_LlcPacket_t        sPacketInfo

);


/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC helper functions <b>Create S frame</b> function
*
* \copydoc page_reg This function creates a S frame
*
* \param[in/out] pllcSFrmBuf    Required buffer to create the S frame
*
* \retval NFCSTATUS_SUCCESS                Operation successful.
* \retval NFCSTATUS_INVALID_PARAMETER      At least one parameter of the function is invalid.
*
*/
void 
phLlcNfc_H_Create_S_Frame(
    uint8_t     *pllcSFrmBuf
);

/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC helper functions <b>Compute CRC</b> function
*
* \copydoc page_reg This function is used to compute CRC for the llc data
*
* \param[in] pData      Llc data for which the CRC needs to be calculated
* \param[in] length     Length is the value till the CRC needs to be 
*                       calculated for the Llc data
* \param[in] pCrc1      1st CRC byte
* \param[in] pCrc2      2nd CRC byte
*
* \retval NFCSTATUS_SUCCESS                Operation successful.
* \retval NFCSTATUS_INVALID_PARAMETER      At least one parameter of the function is invalid.
*
*/
void 
phLlcNfc_H_ComputeCrc(
    uint8_t     *pData, 
    uint8_t     length,
    uint8_t     *pCrc1, 
    uint8_t     *pCrc2
);

/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC helper functions <b>Create U frame payload </b> function
*
* \copydoc page_reg This function is used to create a LLC packet with U frame
*
* \param[in/out]    psLlcCtxt           Llc main structure information
* \param[in/out]    psLlcPacket         Llc packet sent by the upper layer
* \param[in/out]    pLlcPacketLength    Length of the llc packet
* \param[in]        cmdType             U frame has RSET/UA commands
*
* \retval NFCSTATUS_SUCCESS                Operation successful.
* \retval NFCSTATUS_INVALID_PARAMETER      At least one parameter of the function is invalid.
*
*/
NFCSTATUS
phLlcNfc_H_CreateUFramePayload (
    phLlcNfc_Context_t      *psLlcCtxt, 
    phLlcNfc_LlcPacket_t    *psLlcPacket, 
    uint8_t                 *pLlcPacketLength, 
    phLlcNfc_LlcCmd_t       cmdType
);

/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC helper functions <b>Create I frame payload </b> function
*
* \copydoc page_reg This function is used to create a LLC packet with I frame
*
* \param[in/out]    psFrameInfo Information related to LLC frames are stored 
*                           in this structure
* \param[in/out]    psLlcPacket         Llc packet sent by the upper layer
* \param[in]        pLlcBuf     User given buffer or the buffer which needs LLC framing
* \param[in]        llcBufLength    Length of the parameter "pLlcBuf" 
*
* \retval NFCSTATUS_SUCCESS                Operation successful.
* \retval NFCSTATUS_INVALID_PARAMETER      At least one parameter of the function is invalid.
*
*/
NFCSTATUS
phLlcNfc_H_CreateIFramePayload (
    phLlcNfc_Frame_t        *psFrameInfo, 
    phLlcNfc_LlcPacket_t    *psLlcPacket, 
    uint8_t                 *pLlcBuf, 
    uint8_t                 llcBufLength
);

/**
 * \ingroup grp_hal_nfc_llc_helper
 *
 * \brief LLC helper functions <b>Process received frame </b> function
 *
 * \copydoc page_reg This function process the received data
 *
 * \param[in]   pLlcCtxt    Llc main context
 *
 * \retval NFCSTATUS_SUCCESS           Operation successful.
 * \retval NFCSTATUS_INVALID_FORMAT    If any error in the frame
 */
NFCSTATUS 
phLlcNfc_H_ProRecvFrame (
    phLlcNfc_Context_t      *psLlcCtxt
);

/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC component <b>resend the I frame</b> function
*
* \copydoc page_reg This is a helper function which, sends back the timed out 
*   I frame to the PN544. This is due to the reason that ACK is not received 
*   from PN544 within the guard time-out value
*
* \param[in] psLlcCtxt          Llc main structure information
* \param[in/out] psListInfo     List of I frame information
* \param[in] ns_frame_no        Frame number to send (to send the first stored  
*                               frame send DEFAULT_PACKET_INPUT)
*
* \retval NFCSTATUS_SUCCESS                Operation successful.
* \retval NFCSTATUS_INVALID_PARAMETER      At least one parameter of the function is invalid.
*
*/
extern 
NFCSTATUS 
phLlcNfc_H_SendTimedOutIFrame (
    phLlcNfc_Context_t      *psLlcCtxt, 
    phLlcNfc_StoreIFrame_t  *psListInfo, 
    uint8_t                 ns_frame_no
);

/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC state machine functions \b Change state function
*
* \copydoc page_reg changes the state if possible else returns error
*
* \param[in, out] psLlcCtxt     Llc main structure information
* \param[in] changeStateTo      Next state to change
*
* \retval NFCSTATUS_SUCCESS                Operation successful.
* \retval NFCSTATUS_INVALID_PARAMETER      At least one parameter of the function is invalid.
*
*/
extern 
NFCSTATUS 
phLlcNfc_H_ChangeState(
                       phLlcNfc_Context_t  *psLlcCtxt, 
                       phLlcNfc_State_t    changeStateTo
                       );

#ifdef CRC_ERROR_REJ
/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC send reject command function
*
* \copydoc page_reg Sends reject command, when CRC error is recieved
*
* \param[in, out] psLlcCtxt     Llc main structure information
*
* \retval NFCSTATUS_SUCCESS                Operation successful.
* \retval NFCSTATUS_INVALID_PARAMETER      At least one parameter of the function is invalid.
*
*/
extern 
NFCSTATUS 
phLlcNfc_H_SendRejectFrame(
                      phLlcNfc_Context_t  *psLlcCtxt
                      );
#endif /* #ifdef CRC_ERROR_REJ */

/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC Write wait call function
*
* \copydoc page_reg Write that has been ignored earlier will be called in this function
*
* \param[in, out] psLlcCtxt     Llc main structure information
*
* \retval NFCSTATUS_SUCCESS                 Operation successful.
* \retval NFCSTATUS_BUSY                    Write is pended, so wait till it completes.
* \retval NFCSTATUS_INVALID_PARAMETER      At least one parameter of the function is invalid.
*
*/
extern 
NFCSTATUS  
phLlcNfc_H_WriteWaitCall (
    phLlcNfc_Context_t  *psLlcCtxt
    );

/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC Send user frame function
*
* \copydoc page_reg Sends the stored user frame, that are not sent.
*
* \param[in, out]   psLlcCtxt       Llc main structure information
* \param[in]        psListInfo      Stored list of packets
*
* No return value
*
*/
NFCSTATUS 
phLlcNfc_H_SendUserIFrame (
    phLlcNfc_Context_t      *psLlcCtxt, 
    phLlcNfc_StoreIFrame_t  *psListInfo
    );

/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC Send rejected frame function
*
* \copydoc page_reg Sends the stored rejected frame from PN544.
*
* \param[in, out]   psLlcCtxt       Llc main structure information
* \param[in]        psListInfo      Stored list of packets
* \param[in]        ns_rejected     N(S) that was rejected
*
* No return value
*
*/
NFCSTATUS 
phLlcNfc_H_SendRejectedIFrame (
    phLlcNfc_Context_t      *psLlcCtxt, 
    phLlcNfc_StoreIFrame_t  *psListInfo, 
    uint8_t                 ns_rejected
    );

/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC component <b>Create S frame</b> function
*
* \copydoc page_reg This is a helper function which, creates the S frame
*
* \param[in/out] psFrameInfo    Generic frame information
* \param[in/out] psLlcPacket         Llc packet sent by the upper layer
* \param[in/out] cmdType        Command type of S frame
*
* \retval NFCSTATUS_SUCCESS                Operation successful.
* \retval NFCSTATUS_INVALID_PARAMETER      At least one parameter of the function is invalid.
*
*/
NFCSTATUS
phLlcNfc_H_CreateSFramePayload (
    phLlcNfc_Frame_t        *psFrameInfo,
    phLlcNfc_LlcPacket_t    *psLlcPacket,
    phLlcNfc_LlcCmd_t       cmdType
);

/**
* \ingroup grp_hal_nfc_llc_helper
*
* \brief LLC Send upper layer information function
*
* \copydoc page_reg Sends received information to the upper layer frame.
*
* \param[in, out]   psLlcCtxt       Llc main structure information
*
* No return value
*
*/
void 
phLlcNfc_H_SendInfo(
                    phLlcNfc_Context_t          *psLlcCtxt
                    );


/******************** Function declarations *************************/
#endif /* #ifndef PHLLCNFC_FRAME_H */