文件操作 - ca.h
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文件: /usr/include/linux/dvb/ca.h
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/* 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 * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Lesser Public License * as published by the Free Software Foundation; either version 2.1 * 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 Lesser 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. * */ #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) /* 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
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