Appendix G. DVB Conditional Access Header File
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## Appendix G. DVB Conditional Access Header File

    /*
     * 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_

    /* slot interface types and info */

    typedef struct ca_slot_info {
            int num;               /* slot number */

            int type;              /* CA interface this slot supports */
    #define CA_CI            1     /* CI high level interface */
    #define CA_CI_LINK       2     /* CI link layer level interface */
    #define CA_CI_PHYS       4     /* CI physical layer level interface */
    #define CA_DESCR         8     /* built-in descrambler */
    #define CA_SC          128     /* simple smart card interface */

            unsigned int flags;
    #define CA_CI_MODULE_PRESENT 1 /* module (or card) inserted */
    #define CA_CI_MODULE_READY   2
    } ca_slot_info_t;

    /* descrambler types and info */

    typedef struct ca_descr_info {
            unsigned int num;          /* number of available descramblers (keys) */
            unsigned int type;         /* type of supported scrambling system */
    #define CA_ECD           1
    #define CA_NDS           2
    #define CA_DSS           4
    } ca_descr_info_t;

    typedef struct ca_caps {
            unsigned int slot_num;     /* total number of CA card and module slots */
            unsigned int slot_type;    /* OR of all supported types */
            unsigned int descr_num;    /* total number of descrambler slots (keys) */
            unsigned int descr_type;   /* OR of all supported types */
    } ca_caps_t;

    /* a message to/from a CI-CAM */
    typedef struct ca_msg {
            unsigned int index;
            unsigned int type;
            unsigned int length;
            unsigned char msg[256];
    } ca_msg_t;

    typedef struct ca_descr {
            unsigned int index;
            unsigned int parity;    /* 0 == even, 1 == odd */
            unsigned char cw[8];
    } ca_descr_t;

    typedef struct ca_pid {
            unsigned int pid;
            int index;              /* -1 == disable*/
    } ca_pid_t;

    #define CA_RESET          _IO('o', 128)
    #define CA_GET_CAP        _IOR('o', 129, ca_caps_t)
    #define CA_GET_SLOT_INFO  _IOR('o', 130, ca_slot_info_t)
    #define CA_GET_DESCR_INFO _IOR('o', 131, ca_descr_info_t)
    #define CA_GET_MSG        _IOR('o', 132, ca_msg_t)
    #define CA_SEND_MSG       _IOW('o', 133, ca_msg_t)
    #define CA_SET_DESCR      _IOW('o', 134, ca_descr_t)
    #define CA_SET_PID        _IOW('o', 135, ca_pid_t)

    #endif

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