include/net/irda/parameters.h

   1 /*********************************************************************
   2  *
   3  * Filename:      parameters.h
   4  * Version:       1.0
   5  * Description:   A more general way to handle (pi,pl,pv) parameters
   6  * Status:        Experimental.
   7  * Author:        Dag Brattli <dagb@cs.uit.no>
   8  * Created at:    Mon Jun  7 08:47:28 1999
   9  * Modified at:   Sun Jan 30 14:05:14 2000
  10  * Modified by:   Dag Brattli <dagb@cs.uit.no>
  11  *
  12  *     Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
  13  *
  14  *     This program is free software; you can redistribute it and/or
  15  *     modify it under the terms of the GNU General Public License as
  16  *     published by the Free Software Foundation; either version 2 of
  17  *     the License, or (at your option) any later version.
  18  *
  19  *     This program is distributed in the hope that it will be useful,
  20  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  22  *     GNU General Public License for more details.
  23  *
  24  *     You should have received a copy of the GNU General Public License
  25  *     along with this program; if not, see <http://www.gnu.org/licenses/>.
  26  *
  27  *     Michel Dänzer <daenzer@debian.org>, 10/2001
  28  *     - simplify irda_pv_t to avoid endianness issues
  29  *
  30  ********************************************************************/
  31
  32 #ifndef IRDA_PARAMS_H
  33 #define IRDA_PARAMS_H
  34
  35 /*
  36  *  The currently supported types. Beware not to change the sequence since
  37  *  it a good reason why the sized integers has a value equal to their size
  38  */
  39 typedef enum {
  40         PV_INTEGER,      /* Integer of any (pl) length */
  41         PV_INT_8_BITS,   /* Integer of 8 bits in length */
  42         PV_INT_16_BITS,  /* Integer of 16 bits in length */
  43         PV_STRING,       /* \0 terminated string */
  44         PV_INT_32_BITS,  /* Integer of 32 bits in length */
  45         PV_OCT_SEQ,      /* Octet sequence */
  46         PV_NO_VALUE      /* Does not contain any value (pl=0) */
  47 } PV_TYPE;
  48
  49 /* Bit 7 of type field */
  50 #define PV_BIG_ENDIAN    0x80
  51 #define PV_LITTLE_ENDIAN 0x00
  52 #define PV_MASK          0x7f   /* To mask away endian bit */
  53
  54 #define PV_PUT 0
  55 #define PV_GET 1
  56
  57 typedef union {
  58         char   *c;
  59         __u32   i;
  60         __u32 *ip;
  61 } irda_pv_t;
  62
  63 typedef struct {
  64         __u8 pi;
  65         __u8 pl;
  66         irda_pv_t pv;
  67 } irda_param_t;
  68
  69 typedef int (*PI_HANDLER)(void *self, irda_param_t *param, int get);
  70 typedef int (*PV_HANDLER)(void *self, __u8 *buf, int len, __u8 pi,
  71                           PV_TYPE type, PI_HANDLER func);
  72
  73 typedef struct {
  74         const PI_HANDLER func;  /* Handler for this parameter identifier */
  75         PV_TYPE    type;  /* Data type for this parameter */
  76 } pi_minor_info_t;
  77
  78 typedef struct {
  79         const pi_minor_info_t *pi_minor_call_table;
  80         int len;
  81 } pi_major_info_t;
  82
  83 typedef struct {
  84         const pi_major_info_t *tables;
  85         int              len;
  86         __u8             pi_mask;
  87         int              pi_major_offset;
  88 } pi_param_info_t;
  89
  90 int irda_param_pack(__u8 *buf, char *fmt, ...);
  91
  92 int irda_param_insert(void *self, __u8 pi, __u8 *buf, int len,
  93                       pi_param_info_t *info);
  94 int irda_param_extract_all(void *self, __u8 *buf, int len,
  95                            pi_param_info_t *info);
  96
  97 #define irda_param_insert_byte(buf,pi,pv) irda_param_pack(buf,"bbb",pi,1,pv)
  98
  99 #endif /* IRDA_PARAMS_H */
 100