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vdr/ci.h

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/*
* ci.h: Common Interface
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
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* $Id: ci.h 4.13 2019/03/19 14:58:00 kls Exp $
*/
#ifndef __CI_H
#define __CI_H
#include <stdint.h>
#include <stdio.h>
#include "channels.h"
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#include "ringbuffer.h"
#include "thread.h"
#include "tools.h"
#define MAX_CAM_SLOTS_PER_ADAPTER 16 // maximum possible value is 255 (same value as MAXDEVICES!)
#define MAX_CONNECTIONS_PER_CAM_SLOT 8 // maximum possible value is 254
#define CAM_READ_TIMEOUT 50 // ms
class cCiTransportConnection;
class cCamSlot;
// VDR's Common Interface functions implement only the features that are absolutely
// necessary to control a CAM. If a plugin wants to implement additional functionality
// (i.e. "resources"), it can do so by deriving from cCiResourceHandler, cCiSession
// and (if necessary) from cCiApplicationInformation.
class cCiSession {
private:
uint16_t sessionId;
uint32_t resourceId;
cCiTransportConnection *tc;
protected:
void SetTsPostProcessor(void);
///< If this cCiSession implements the TsPostProcess() function, it shall call
///< SetTsPostProcessor() to register itself as the TS post processor.
void SetResourceId(uint32_t Id);
///< If this is a class that has been derived from an existing cCiSession class,
///< but implements a different resource id, it shall call SetResourceId() with
///< that Id.
int GetTag(int &Length, const uint8_t **Data);
const uint8_t *GetData(const uint8_t *Data, int &Length);
void SendData(int Tag, int Length = 0, const uint8_t *Data = NULL);
cCiTransportConnection *Tc(void) { return tc; }
public:
cCiSession(uint16_t SessionId, uint32_t ResourceId, cCiTransportConnection *Tc);
virtual ~cCiSession();
uint16_t SessionId(void) { return sessionId; }
uint32_t ResourceId(void) { return resourceId; }
cCamSlot *CamSlot(void);
virtual bool HasUserIO(void) { return false; }
virtual void Process(int Length = 0, const uint8_t *Data = NULL);
virtual bool TsPostProcess(uint8_t *TsPacket) { return false; }
///< If this cCiSession needs to do additional processing on TS packets (after
///< the CAM has done the decryption), it shall implement TsPostProcess() and
///< do whatever operations are necessary on the given TsPacket. This function
///< is called once for each TS packet, and any and all operations must be
///< finished upon return.
///< A derived cCiSession that implements this function must call
///< SetTsPostProcessor() to make it actually get called.
///< Returns true if the TsPacket was in any way modified.
};
class cCiApplicationInformation : public cCiSession {
protected:
int state;
uint8_t applicationType;
uint16_t applicationManufacturer;
uint16_t manufacturerCode;
char *menuString;
public:
cCiApplicationInformation(uint16_t SessionId, cCiTransportConnection *Tc);
virtual ~cCiApplicationInformation();
virtual void Process(int Length = 0, const uint8_t *Data = NULL);
bool EnterMenu(void);
const char *GetMenuString(void) { return menuString; }
};
class cCiResourceHandler : public cListObject {
public:
cCiResourceHandler(void);
///< Creates a new resource handler, through which the available resources
///< can be provides. A resource handler shall be allocated on the heap and
///< registered with the global CiResourceHandlers, as in
///< CiResourceHandlers.Register(new cMyResourceHandler);
///< It will be automatically deleted at the end of the program.
virtual ~cCiResourceHandler();
virtual const uint32_t *ResourceIds(void) const = 0;
///< Returns a pointer to an array of resource identifiers, where the
///< last value is zero.
virtual cCiSession *GetNewCiSession(uint32_t ResourceId, uint16_t SessionId, cCiTransportConnection *Tc) = 0;
///< Returns a new cCiSession, according to the given ResourceId.
};
class cCiResourceHandlers : public cList<cCiResourceHandler> {
private:
cVector<uint32_t> resourceIds;
public:
cCiResourceHandlers(void);
///< Creates the default list of resourceIds.
void Register(cCiResourceHandler *ResourceHandler);
///< Adds the given ResourceHandler to the list of resource handlers and
///< appends its ResourceIds to the global resourceIds.
///< A plugin that implements additional CAM capabilities must call
///< this function to register its resources.
const uint32_t *Ids(void) { return &resourceIds[0]; }
int NumIds(void) { return resourceIds.Size(); }
cCiSession *GetNewCiSession(uint32_t ResourceId, uint16_t SessionId, cCiTransportConnection *Tc);
};
extern cCiResourceHandlers CiResourceHandlers;
class cCiMMI;
class cCiMenu {
friend class cCamSlot;
friend class cCiMMI;
private:
enum { MAX_CIMENU_ENTRIES = 64 }; ///< XXX is there a specified maximum?
cCiMMI *mmi;
cMutex *mutex;
bool selectable;
char *titleText;
char *subTitleText;
char *bottomText;
char *entries[MAX_CIMENU_ENTRIES];
int numEntries;
bool AddEntry(char *s);
cCiMenu(cCiMMI *MMI, bool Selectable);
public:
~cCiMenu();
const char *TitleText(void) { return titleText; }
const char *SubTitleText(void) { return subTitleText; }
const char *BottomText(void) { return bottomText; }
const char *Entry(int n) { return n < numEntries ? entries[n] : NULL; }
int NumEntries(void) { return numEntries; }
bool Selectable(void) { return selectable; }
void Select(int Index);
void Cancel(void);
void Abort(void);
bool HasUpdate(void);
};
class cCiEnquiry {
friend class cCamSlot;
friend class cCiMMI;
private:
cCiMMI *mmi;
cMutex *mutex;
char *text;
bool blind;
int expectedLength;
cCiEnquiry(cCiMMI *MMI);
public:
~cCiEnquiry();
const char *Text(void) { return text; }
bool Blind(void) { return blind; }
int ExpectedLength(void) { return expectedLength; }
void Reply(const char *s);
void Cancel(void);
void Abort(void);
};
class cDevice;
enum eModuleStatus { msNone, msReset, msPresent, msReady };
class cCiAdapter : public cThread {
friend class cCamSlot;
private:
cCamSlot *camSlots[MAX_CAM_SLOTS_PER_ADAPTER];
void AddCamSlot(cCamSlot *CamSlot);
///< Adds the given CamSlot to this CI adapter.
protected:
cCamSlot *ItCamSlot(int &Iter);
///< Iterates over all added CAM slots of this adapter. Iter has to be
///< initialized to 0 and is required to store the iteration state.
///< Returns NULL if no further CAM slot is found.
virtual void Action(void);
///< Handles the attached CAM slots in a separate thread.
///< The derived class must call the Start() function to
///< actually start CAM handling.
virtual int Read(uint8_t *Buffer, int MaxLength) { return 0; }
///< Reads one chunk of data into the given Buffer, up to MaxLength bytes.
///< If no data is available immediately, wait for up to CAM_READ_TIMEOUT.
///< Returns the number of bytes read (in case of an error it will also
///< return 0).
virtual void Write(const uint8_t *Buffer, int Length) {}
///< Writes Length bytes of the given Buffer.
virtual bool Reset(int Slot) { return false; }
///< Resets the CAM in the given Slot.
///< Returns true if the operation was successful.
virtual eModuleStatus ModuleStatus(int Slot) { return msNone; }
///< Returns the status of the CAM in the given Slot.
virtual bool Assign(cDevice *Device, bool Query = false) { return false; }
///< Assigns this adapter to the given Device, if this is possible.
///< If Query is 'true', the adapter only checks whether it can be
///< assigned to the Device, but doesn't actually assign itself to it.
///< Returns true if the adapter can be assigned to the Device.
///< If Device is NULL, the adapter will be unassigned from any
///< device it was previously assigned to. The value of Query
///< is ignored in that case, and this function always returns
///< 'true'.
public:
cCiAdapter(void);
virtual ~cCiAdapter();
///< The derived class must call Cancel(3) in its destructor.
};
class cTPDU;
class cCiTransportConnection;
class cCiSession;
class cCiCaProgramData;
class cCaPidReceiver;
class cCaActivationReceiver;
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class cMtdHandler;
class cMtdMapper;
class cMtdCamSlot;
class cCiCaPmt;
struct cCiCaPmtList {
cVector<cCiCaPmt *> caPmts;
~cCiCaPmtList();
cCiCaPmt *Add(uint8_t CmdId, int Source, int Transponder, int ProgramNumber, const int *CaSystemIds);
void Del(cCiCaPmt *CaPmt);
};
class cCamSlot : public cListObject {
friend class cCiAdapter;
friend class cCiTransportConnection;
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friend class cCiConditionalAccessSupport;
friend class cMtdCamSlot;
private:
cMutex mutex;
cCondVar processed;
cCiAdapter *ciAdapter;
cCamSlot *masterSlot;
cDevice *assignedDevice;
cCaPidReceiver *caPidReceiver;
cCaActivationReceiver *caActivationReceiver;
int slotIndex;
int slotNumber;
cCiTransportConnection *tc[MAX_CONNECTIONS_PER_CAM_SLOT + 1]; // connection numbering starts with 1
eModuleStatus lastModuleStatus;
time_t resetTime;
cTimeMs moduleCheckTimer;
bool resendPmt;
int source;
int transponder;
cList<cCiCaProgramData> caProgramList;
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bool mtdAvailable;
cMtdHandler *mtdHandler;
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void KeepSharedCaPids(int ProgramNumber, const int *CaSystemIds, int *CaPids);
void NewConnection(void);
void DeleteAllConnections(void);
void Process(cTPDU *TPDU = NULL);
void Write(cTPDU *TPDU);
cCiSession *GetSessionByResourceId(uint32_t ResourceId);
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void MtdActivate(bool On);
///< Activates (On == true) or deactivates (On == false) MTD.
protected:
virtual const int *GetCaSystemIds(void);
virtual void SendCaPmt(uint8_t CmdId);
virtual bool RepliesToQuery(void);
///< Returns true if the CAM in this slot replies to queries and thus
///< supports MCD ("Multi Channel Decryption").
void BuildCaPmts(uint8_t CmdId, cCiCaPmtList &CaPmtList, cMtdMapper *MtdMapper = NULL);
///< Generates all CA_PMTs with the given CmdId and stores them in the given CaPmtList.
///< If MtdMapper is given, all SIDs and PIDs will be mapped accordingly.
void SendCaPmts(cCiCaPmtList &CaPmtList);
///< Sends the given list of CA_PMTs to the CAM.
void MtdEnable(void);
///< Enables MTD support for this CAM. Note that actual MTD operation also
///< requires a CAM that supports MCD ("Multi Channel Decryption").
int MtdPutData(uchar *Data, int Count);
///< Sends at most Count bytes of the given Data to the individual MTD CAM slots
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///< that are using this CAM. Data must point to the beginning of a TS packet.
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///< Returns the number of bytes actually processed.
public:
bool McdAvailable(void) { return RepliesToQuery(); }
///< Returns true if this CAM supports MCD ("Multi Channel Decyption").
bool MtdAvailable(void) { return mtdAvailable; }
///< Returns true if this CAM supports MTD ("Multi Transponder Decryption").
bool MtdActive(void) { return mtdHandler != NULL; }
///< Returns true if MTD is currently active.
public:
cCamSlot(cCiAdapter *CiAdapter, bool WantsTsData = false, cCamSlot *MasterSlot = NULL);
///< Creates a new CAM slot for the given CiAdapter.
///< The CiAdapter will take care of deleting the CAM slot,
///< so the caller must not delete it!
///< If WantsTsData is true, the device this CAM slot is assigned to will
///< call the Decrypt() function of this CAM slot, presenting it the complete
///< TS data stream of the encrypted programme, including the CA pids.
///< If this CAM slot is basically the same as an other one, MasterSlot can
///< be given to indicate this. This can be used for instance for CAM slots
///< that can do MTD ("Multi Transponder Decryption"), where the first cCamSlot
///< is created without giving a MasterSlot, and all others are given the first
///< one as their MasterSlot. This can speed up the search for a suitable CAM
///< when tuning to an encrypted channel, and it also makes the Setup/CAM menu
///< clearer because only the master CAM slots will be shown there.
virtual ~cCamSlot();
bool IsMasterSlot(void) { return !masterSlot; }
///< Returns true if this CAM slot itself is a master slot (which means that
///< it doesn't have a pointer to another CAM slot that's its master).
cCamSlot *MasterSlot(void) { return masterSlot ? masterSlot : this; }
///< Returns this CAM slot's master slot, or a pointer to itself if it is a
///< master slot.
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cCamSlot *MtdSpawn(void);
///< If this CAM slot can do MTD ("Multi Transponder Decryption"),
///< a call to this function returns a cMtdCamSlot with this CAM slot
///< as its master. Otherwise a pointer to this object is returned, which
///< means that MTD is not supported.
void TriggerResendPmt(void) { resendPmt = true; }
///< Tells this CAM slot to resend the list of CA_PMTs to the CAM.
virtual bool Assign(cDevice *Device, bool Query = false);
///< Assigns this CAM slot to the given Device, if this is possible.
///< If Query is 'true', the CI adapter of this slot only checks whether
///< it can be assigned to the Device, but doesn't actually assign itself to it.
///< Returns true if this slot can be assigned to the Device.
///< If Device is NULL, the slot will be unassigned from any
///< device it was previously assigned to. The value of Query
///< is ignored in that case, and this function always returns
///< 'true'.
///< If a derived class reimplements this function, it can return 'false'
///< if this CAM can't be assigned to the given Device. If the CAM can be
///< assigned to the Device, or if Device is NULL, it must call the base
///< class function.
cDevice *Device(void) { return assignedDevice; }
///< Returns the device this CAM slot is currently assigned to.
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bool Devices(cVector<int> &CardIndexes);
///< Adds the card indexes of any devices that currently use this CAM to
///< the given CardIndexes. This can be more than one in case of MTD.
///< Returns true if the array is not empty.
bool WantsTsData(void) const { return caPidReceiver != NULL; }
///< Returns true if this CAM slot wants to receive the TS data through
///< its Decrypt() function.
int SlotIndex(void) { return slotIndex; }
///< Returns the index of this CAM slot within its CI adapter.
///< The first slot has an index of 0.
int SlotNumber(void) { return slotNumber; }
///< Returns the number of this CAM slot within the whole system.
///< The first slot has the number 1.
int MasterSlotNumber(void) { return masterSlot ? masterSlot->SlotNumber() : slotNumber; }
///< Returns the number of this CAM's master slot within the whole system.
///< The first slot has the number 1.
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virtual bool Reset(void);
///< Resets the CAM in this slot.
///< Returns true if the operation was successful.
virtual bool CanActivate(void);
///< Returns true if there is a CAM in this slot that can be put into
///< activation mode.
virtual void StartActivation(void);
///< Puts the CAM in this slot into a mode where an inserted smart card
///< can be activated. The default action is to make IsActivating() return
///< true, which causes the device this CAM slot is attached to to never
///< automatically detach any receivers with negative priority if the
///< PIDs they want to receive are not decrypted by the CAM.
///< StartActivation() must be called *after* the CAM slot has been assigned
///< to a device. The CAM slot will stay in activation mode until the CAM
///< begins to decrypt, a call to CancelActivation() is made, or the device
///< is needed for a recording.
virtual void CancelActivation(void);
///< Cancels a previously started activation (if any).
virtual bool IsActivating(void);
///< Returns true if this CAM slot is currently activating a smart card.
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virtual eModuleStatus ModuleStatus(void);
///< Returns the status of the CAM in this slot.
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virtual const char *GetCamName(void);
///< Returns the name of the CAM in this slot, or NULL if there is
///< no ready CAM in this slot.
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virtual bool Ready(void);
///< Returns 'true' if the CAM in this slot is ready to decrypt.
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virtual bool HasMMI(void);
///< Returns 'true' if the CAM in this slot has an active MMI.
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virtual bool HasUserIO(void);
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///< Returns true if there is a pending user interaction, which shall
///< be retrieved via GetMenu() or GetEnquiry().
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virtual bool EnterMenu(void);
///< Requests the CAM in this slot to start its menu.
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virtual cCiMenu *GetMenu(void);
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///< Gets a pending menu, or NULL if there is no menu.
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virtual cCiEnquiry *GetEnquiry(void);
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///< Gets a pending enquiry, or NULL if there is no enquiry.
int Priority(void);
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///< Returns the priority of the device this slot is currently assigned
///< to, or IDLEPRIORITY if it is not assigned to any device.
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virtual bool ProvidesCa(const int *CaSystemIds);
///< Returns true if the CAM in this slot provides one of the given
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///< CaSystemIds. This doesn't necessarily mean that it will be
///< possible to actually decrypt such a programme, since CAMs
///< usually advertise several CA system ids, while the actual
///< decryption is controlled by the smart card inserted into
///< the CAM.
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virtual void AddPid(int ProgramNumber, int Pid, int StreamType);
///< Adds the given PID information to the list of PIDs. A later call
///< to SetPid() will (de)activate one of these entries.
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virtual void SetPid(int Pid, bool Active);
///< Sets the given Pid (which has previously been added through a
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///< call to AddPid()) to Active. A later call to StartDecrypting() will
///< send the full list of currently active CA_PMT entries to the CAM.
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virtual void AddChannel(const cChannel *Channel);
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///< Adds all PIDs of the given Channel to the current list of PIDs.
///< If the source or transponder of the channel are different than
///< what was given in a previous call to AddChannel(), any previously
///< added PIDs will be cleared.
virtual bool CanDecrypt(const cChannel *Channel, cMtdMapper *MtdMapper = NULL);
///< Returns true if there is a CAM in this slot that is able to decrypt
///< the given Channel (or at least claims to be able to do so).
///< Since the QUERY/REPLY mechanism for CAMs is pretty unreliable (some
///< CAMs don't reply to queries at all), we always return true if the
///< CAM is currently not decrypting anything. If there is already a
///< channel being decrypted, a call to CanDecrypt() checks whether the
///< CAM can also decrypt the given channel. Only CAMs that have replied
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///< to the initial QUERY will perform this check at all. CAMs that never
///< replied to the initial QUERY are assumed not to be able to handle
///< more than one channel at a time.
///< If MtdMapper is given, all SIDs and PIDs will be mapped accordingly.
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virtual void StartDecrypting(void);
///< Sends all CA_PMT entries to the CAM that have been modified since the
///< last call to this function. This includes CA_PMTs that have been
///< added or activated, as well as ones that have been deactivated.
///< StartDecrypting() will be called whenever a PID is activated or
///< deactivated.
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virtual void StopDecrypting(void);
///< Clears the list of CA_PMT entries and tells the CAM to stop decrypting.
///< Note that this function is only called when there are no more PIDs for
///< the CAM to decrypt. There is no symmetry between StartDecrypting() and
///< StopDecrypting().
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virtual bool IsDecrypting(void);
///< Returns true if the CAM in this slot is currently used for decrypting.
virtual uchar *Decrypt(uchar *Data, int &Count);
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///< If this is a CAM slot that can be freely assigned to any device,
///< but will not be directly inserted into the full TS data stream
///< in hardware, it can implement this function to be given access
///< to the data in the device's TS buffer. Data points to a buffer
///< of Count bytes of TS data. The first byte in Data is guaranteed
///< to be a TS_SYNC_BYTE, and Count is at least TS_SIZE.
///< Note that Decrypt() may be called with Data == NULL! This is necessary
///< to allow CAMs that copy the incoming data into a separate buffer to
///< return previously received and decrypted TS packets. If Data is NULL,
///< Count is 0 and must not be modified, and the return value shall point to the
///< next available decrypted TS packet (if any).
///< There are three possible ways a CAM can handle decryption:
///< 1. If the full TS data is physically routed through the CAM in hardware,
///< there is no need to reimplement this function.
///< The default implementation simply sets Count to TS_SIZE and returns Data.
///< 2. If the CAM works directly on Data and decrypts the TS "in place" it
///< shall decrypt at least the very first TS packet in Data, set Count to
///< TS_SIZE and return Data. It may decrypt as many TS packets in Data as it
///< wants, but it must decrypt at least the very first TS packet (if at all
///< possible - if, for whatever reasons, it can't decrypt the very first
///< packet, it must return it regardless). Only this very first TS packet will
///< be further processed after the call to this function. The next call will
///< be done with Data pointing to the TS packet immediately following the
///< previous one.
///< 3. If the CAM needs to copy the data into a buffer of its own, and/or send
///< the data to some file handle for processing and later retrieval, it shall
///< set Count to the number of bytes it has read from Data and return a pointer
///< to the next available decrypted TS packet (which will *not* be in the
///< memory area pointed to by Data, but rather in some buffer that is under
///< the CAM's control). If no decrypted TS packet is currently available, NULL
///< shall be returned. If no data from Data can currently be processed, Count
///< shall be set to 0 and the same Data pointer will be offered in the next
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///< call to Decrypt(). See mtd.h for further requirements if this CAM can
///< do MTD ("Multi Transponder Decryption").
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///< A derived class that implements this function will also need
///< to set the WantsTsData parameter in the call to the base class
///< constructor to true in order to receive the TS data.
virtual bool TsPostProcess(uchar *Data);
///< If there is a cCiSession that needs to do additional processing on TS packets
///< (after the CAM has done the decryption), this function will call its
///< TsPostProcess() function to have it do whatever operations are necessary on
///< the given TsPacket.
///< Returns true if the TsPacket was in any way modified.
virtual bool Inject(uchar *Data, int Count);
///< Sends all Count bytes of the given Data to the CAM, and returns true
///< if this was possible. If the data can't be sent to the CAM completely,
///< nothing shall be sent and the return value shall be false.
///< No decrypted packet is returned by this function.
///< Data is guaranteed to point to one or more complete TS packets.
virtual void InjectEit(int Sid);
///< Injects a generated EIT with a "present event" for the given Sid into
///< the TS data stream sent to the CAM. This only applies to CAM slots that
///< have WantsTsData set to true in their constructor.
///< The default implementation sends an EIT with the minimum event
///< necessary to disable the CAMs parental rating prompt.
};
class cCamSlots : public cList<cCamSlot> {
public:
int NumReadyMasterSlots(void);
///< Returns the number of master CAM slots in the system that are ready
///< to decrypt.
bool WaitForAllCamSlotsReady(int Timeout = 0);
///< Waits until all CAM slots have become ready, or the given Timeout
///< (seconds) has expired. While waiting, the Ready() function of each
///< CAM slot is called in turn, until they all return true.
///< Returns true if all CAM slots have become ready within the given
///< timeout.
};
extern cCamSlots CamSlots;
class cChannelCamRelation;
class cChannelCamRelations : public cList<cChannelCamRelation> {
private:
cMutex mutex;
cString fileName;
cChannelCamRelation *GetEntry(tChannelID ChannelID);
cChannelCamRelation *AddEntry(tChannelID ChannelID);
time_t lastCleanup;
void Cleanup(void);
public:
cChannelCamRelations(void);
void Reset(int CamSlotNumber);
bool CamChecked(tChannelID ChannelID, int CamSlotNumber);
bool CamDecrypt(tChannelID ChannelID, int CamSlotNumber);
void SetChecked(tChannelID ChannelID, int CamSlotNumber);
void SetDecrypt(tChannelID ChannelID, int CamSlotNumber);
void ClrChecked(tChannelID ChannelID, int CamSlotNumber);
void ClrDecrypt(tChannelID ChannelID, int CamSlotNumber);
void Load(const char *FileName);
void Save(void);
};
extern cChannelCamRelations ChannelCamRelations;
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bool CamResponsesLoad(const char *FileName, bool AllowComments = false, bool MustExist = false);
#endif //__CI_H