Quelle ca.h Sprache: C

/* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */
/*
* ca.h
*
* Copyright (C) 2000 Ralph  Metzler <ralph@convergence.de>
*                  & Marcus Metzler <marcus@convergence.de>
*                    for convergence integrated media GmbH
*/

#ifndef _DVBCA_H_
#define _DVBCA_H_

/**
* struct ca_slot_info - CA slot interface types and info.
*
* @num: slot number.
* @type: slot type.
* @flags: flags applicable to the slot.
*
* This struct stores the CA slot information.
*
* @type can be:
*
* - %CA_CI - CI high level interface;
* - %CA_CI_LINK - CI link layer level interface;
* - %CA_CI_PHYS - CI physical layer level interface;
* - %CA_DESCR - built-in descrambler;
* - %CA_SC -simple smart card interface.
*
* @flags can be:
*
* - %CA_CI_MODULE_PRESENT - module (or card) inserted;
* - %CA_CI_MODULE_READY - module is ready for usage.
*/

struct ca_slot_info {
int num;
int type;
#define CA_CI            1
#define CA_CI_LINK       2
#define CA_CI_PHYS       4
#define CA_DESCR         8
#define CA_SC          128

unsigned int flags;
#define CA_CI_MODULE_PRESENT 1
#define CA_CI_MODULE_READY   2
};

/**
* struct ca_descr_info - descrambler types and info.
*
* @num: number of available descramblers (keys).
* @type: type of supported scrambling system.
*
* Identifies the number of descramblers and their type.
*
* @type can be:
*
* - %CA_ECD - European Common Descrambler (ECD) hardware;
* - %CA_NDS - Videoguard (NDS) hardware;
* - %CA_DSS - Distributed Sample Scrambling (DSS) hardware.
*/
struct ca_descr_info {
unsigned int num;
unsigned int type;
#define CA_ECD           1
#define CA_NDS           2
#define CA_DSS           4
};

/**
* struct ca_caps - CA slot interface capabilities.
*
* @slot_num: total number of CA card and module slots.
* @slot_type: bitmap with all supported types as defined at
* &struct ca_slot_info (e. g. %CA_CI, %CA_CI_LINK, etc).
* @descr_num: total number of descrambler slots (keys)
* @descr_type: bitmap with all supported types as defined at
* &struct ca_descr_info (e. g. %CA_ECD, %CA_NDS, etc).
*/
struct ca_caps {
unsigned int slot_num;
unsigned int slot_type;
unsigned int descr_num;
unsigned int descr_type;
};

/**
* struct ca_msg - a message to/from a CI-CAM
*
* @index: unused
* @type: unused
* @length: length of the message
* @msg: message
*
* This struct carries a message to be send/received from a CI CA module.
*/
struct ca_msg {
unsigned int index;
unsigned int type;
unsigned int length;
unsigned char msg[256];
};

/**
* struct ca_descr - CA descrambler control words info
*
* @index: CA Descrambler slot
* @parity: control words parity, where 0 means even and 1 means odd
* @cw: CA Descrambler control words
*/
struct ca_descr {
unsigned int index;
unsigned int parity;
unsigned char cw[8];
};

#define CA_RESET          _IO('o', 128)
#define CA_GET_CAP        _IOR('o', 129, struct ca_caps)
#define CA_GET_SLOT_INFO  _IOR('o', 130, struct ca_slot_info)
#define CA_GET_DESCR_INFO _IOR('o', 131, struct ca_descr_info)
#define CA_GET_MSG        _IOR('o', 132, struct ca_msg)
#define CA_SEND_MSG       _IOW('o', 133, struct ca_msg)
#define CA_SET_DESCR      _IOW('o', 134, struct ca_descr)

#if !defined(__KERNEL__)

/* This is needed for legacy userspace support */
typedef struct ca_slot_info ca_slot_info_t;
typedef struct ca_descr_info  ca_descr_info_t;
typedef struct ca_caps  ca_caps_t;
typedef struct ca_msg ca_msg_t;
typedef struct ca_descr ca_descr_t;

#endif

#endif

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