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/*
* libdvbca - interface onto raw CA devices
*
* Copyright (C) 2006 Andrew de Quincey (adq_dvb@lidskialf.net)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef LIBDVBCA_H
#define LIBDVBCA_H 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <stdint.h>
/**
* The types of CA interface we support.
*/
#define DVBCA_INTERFACE_LINK 0
#define DVBCA_INTERFACE_HLCI 1
/**
* States a CAM in a slot can be in.
*/
#define DVBCA_CAMSTATE_MISSING 0
#define DVBCA_CAMSTATE_INITIALISING 1
#define DVBCA_CAMSTATE_READY 2
/**
* Open a CA device. Multiple CAMs can be accessed through a CA device.
*
* @param adapter Index of the DVB adapter.
* @param cadevice Index of the CA device on that adapter (usually 0).
* @return A unix file descriptor on success, or -1 on failure.
*/
extern int dvbca_open(int adapter, int cadevice);
/**
* Reset a CAM.
*
* @param fd File handle opened with dvbca_open.
* @param slot Slot where the requested CAM is in.
* @return 0 on success, -1 on failure.
*/
extern int dvbca_reset(int fd, uint8_t slot);
/**
* Get the interface type of a CAM.
*
* @param fd File handle opened with dvbca_open.
* @param slot Slot where the requested CAM is in.
* @return One of the DVBCA_INTERFACE_* values, or -1 on failure.
*/
extern int dvbca_get_interface_type(int fd, uint8_t slot);
/**
* Get the state of a CAM.
*
* @param fd File handle opened with dvbca_open.
* @param slot Slot where the requested CAM is in.
* @return One of the DVBCA_CAMSTATE_* values, or -1 on failure.
*/
extern int dvbca_get_cam_state(int fd, uint8_t slot);
/**
* Write a message to a CAM using a link-layer interface.
*
* @param fd File handle opened with dvbca_open.
* @param slot Slot where the requested CAM is in.
* @param connection_id Connection ID of the message.
* @param data Data to write.
* @param data_length Number of bytes to write.
* @return 0 on success, or -1 on failure.
*/
extern int dvbca_link_write(int fd, uint8_t slot, uint8_t connection_id,
uint8_t *data, uint16_t data_length);
/**
* Read a message from a CAM using a link-layer interface.
*
* @param fd File handle opened with dvbca_open.
* @param slot Slot where the responding CAM is in.
* @param connection_id Destination for the connection ID the message came from.
* @param data Data that was read.
* @param data_length Max number of bytes to read.
* @return Number of bytes read on success, or -1 on failure.
*/
extern int dvbca_link_read(int fd, uint8_t *slot, uint8_t *connection_id,
uint8_t *data, uint16_t data_length);
// FIXME how do we determine which CAM slot of a CA is meant?
/**
* Write a message to a CAM using an HLCI interface.
*
* @param fd File handle opened with dvbca_open.
* @param data Data to write.
* @param data_length Number of bytes to write.
* @return 0 on success, or -1 on failure.
*/
extern int dvbca_hlci_write(int fd, uint8_t *data, uint16_t data_length);
// FIXME how do we determine which CAM slot of a CA is meant?
/**
* Read a message from a CAM using an HLCI interface.
*
* @param fd File handle opened with dvbca_open.
* @param app_tag Application layer tag giving the message type to read.
* @param data Data that was read.
* @param data_length Max number of bytes to read.
* @return Number of bytes read on success, or -1 on failure.
*/
extern int dvbca_hlci_read(int fd, uint32_t app_tag, uint8_t *data,
uint16_t data_length);
#ifdef __cplusplus
}
#endif
#endif // LIBDVBCA_H
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