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ci.c
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/*
* ci.c: Common Interface
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: ci.c 3.4 2014/01/02 10:31:12 kls Exp $
*/
#include "ci.h"
#include <ctype.h>
#include <linux/dvb/ca.h>
#include <malloc.h>
#include <netinet/in.h>
#include <poll.h>
#include <string.h>
#include <sys/ioctl.h>
#include <time.h>
#include <unistd.h>
#include "device.h"
#include "pat.h"
#include "receiver.h"
#include "tools.h"
// Set these to 'true' for debug output:
static bool DumpTPDUDataTransfer = false;
static bool DebugProtocol = false;
static bool DumpPolls = false;
static bool DumpDateTime = false;
#define dbgprotocol(a...) if (DebugProtocol) fprintf(stderr, a)
// --- Helper functions ------------------------------------------------------
#define SIZE_INDICATOR 0x80
static const uint8_t *GetLength(const uint8_t *Data, int &Length)
///< Gets the length field from the beginning of Data.
///< Returns a pointer to the first byte after the length and
///< stores the length value in Length.
{
Length = *Data++;
if ((Length & SIZE_INDICATOR) != 0) {
int l = Length & ~SIZE_INDICATOR;
Length = 0;
for (int i = 0; i < l; i++)
Length = (Length << 8) | *Data++;
}
return Data;
}
static uint8_t *SetLength(uint8_t *Data, int Length)
///< Sets the length field at the beginning of Data.
///< Returns a pointer to the first byte after the length.
{
uint8_t *p = Data;
if (Length < 128)
*p++ = Length;
else {
int n = sizeof(Length);
for (int i = n - 1; i >= 0; i--) {
int b = (Length >> (8 * i)) & 0xFF;
if (p != Data || b)
*++p = b;
}
*Data = (p - Data) | SIZE_INDICATOR;
p++;
}
return p;
}
static char *CopyString(int Length, const uint8_t *Data)
///< Copies the string at Data.
///< Returns a pointer to a newly allocated string.
{
// Some CAMs send funny characters at the beginning of strings.
// Let's just skip them:
while (Length > 0 && (*Data == ' ' || *Data == 0x05 || *Data == 0x96 || *Data == 0x97)) {
Length--;
Data++;
}
char *s = MALLOC(char, Length + 1);
strncpy(s, (char *)Data, Length);
s[Length] = 0;
// The character 0x8A is used as newline, so let's put a real '\n' in there:
strreplace(s, 0x8A, '\n');
return s;
}
static char *GetString(int &Length, const uint8_t **Data)
///< Gets the string at Data.
///< Returns a pointer to a newly allocated string, or NULL in case of error.
///< Upon return Length and Data represent the remaining data after the string has been skipped.
{
if (Length > 0 && Data && *Data) {
int l = 0;
const uint8_t *d = GetLength(*Data, l);
char *s = CopyString(l, d);
Length -= d - *Data + l;
*Data = d + l;
return s;
}
return NULL;
}
// --- cCaPidReceiver --------------------------------------------------------
// A dummy receiver, just used to make the device receive the CA pids.
class cCaPidReceiver : public cReceiver {
public:
virtual ~cCaPidReceiver() { Detach(); }
virtual void Receive(uchar *Data, int Length) {}
};
// --- cTPDU -----------------------------------------------------------------
#define MAX_TPDU_SIZE 2048
#define MAX_TPDU_DATA (MAX_TPDU_SIZE - 4)
#define DATA_INDICATOR 0x80
#define T_SB 0x80
#define T_RCV 0x81
#define T_CREATE_TC 0x82
#define T_CTC_REPLY 0x83
#define T_DELETE_TC 0x84
#define T_DTC_REPLY 0x85
#define T_REQUEST_TC 0x86
#define T_NEW_TC 0x87
#define T_TC_ERROR 0x88
#define T_DATA_LAST 0xA0
#define T_DATA_MORE 0xA1
class cTPDU {
private:
int size;
uint8_t buffer[MAX_TPDU_SIZE];
const uint8_t *GetData(const uint8_t *Data, int &Length);
public:
cTPDU(void) { size = 0; }
cTPDU(uint8_t Slot, uint8_t Tcid, uint8_t Tag, int Length = 0, const uint8_t *Data = NULL);
uint8_t Slot(void) { return buffer[0]; }
uint8_t Tcid(void) { return buffer[1]; }
uint8_t Tag(void) { return buffer[2]; }
const uint8_t *Data(int &Length) { return GetData(buffer + 3, Length); }
uint8_t Status(void);
uint8_t *Buffer(void) { return buffer; }
int Size(void) { return size; }
void SetSize(int Size) { size = Size; }
int MaxSize(void) { return sizeof(buffer); }
void Dump(int SlotNumber, bool Outgoing);
};
cTPDU::cTPDU(uint8_t Slot, uint8_t Tcid, uint8_t Tag, int Length, const uint8_t *Data)
{
size = 0;
buffer[0] = Slot;
buffer[1] = Tcid;
buffer[2] = Tag;
switch (Tag) {
case T_RCV:
case T_CREATE_TC:
case T_CTC_REPLY:
case T_DELETE_TC:
case T_DTC_REPLY:
case T_REQUEST_TC:
buffer[3] = 1; // length
buffer[4] = Tcid;
size = 5;
break;
case T_NEW_TC:
case T_TC_ERROR:
if (Length == 1) {
buffer[3] = 2; // length
buffer[4] = Tcid;
buffer[5] = Data[0];
size = 6;
}
else
esyslog("ERROR: invalid data length for TPDU tag 0x%02X: %d (%d/%d)", Tag, Length, Slot, Tcid);
break;
case T_DATA_LAST:
case T_DATA_MORE:
if (Length <= MAX_TPDU_DATA) {
uint8_t *p = buffer + 3;
p = SetLength(p, Length + 1);
*p++ = Tcid;
if (Length)
memcpy(p, Data, Length);
size = Length + (p - buffer);
}
else
esyslog("ERROR: invalid data length for TPDU tag 0x%02X: %d (%d/%d)", Tag, Length, Slot, Tcid);
break;
default:
esyslog("ERROR: unknown TPDU tag: 0x%02X (%d/%d)", Tag, Slot, Tcid);
}
}
void cTPDU::Dump(int SlotNumber, bool Outgoing)
{
if (DumpTPDUDataTransfer && (DumpPolls || Tag() != T_SB)) {
#define MAX_DUMP 256
fprintf(stderr, " %d: %s ", SlotNumber, Outgoing ? "-->" : "<--");
for (int i = 0; i < size && i < MAX_DUMP; i++)
fprintf(stderr, "%02X ", buffer[i]);
fprintf(stderr, "%s\n", size >= MAX_DUMP ? "..." : "");
if (!Outgoing) {
fprintf(stderr, " ");
for (int i = 0; i < size && i < MAX_DUMP; i++)
fprintf(stderr, "%2c ", isprint(buffer[i]) ? buffer[i] : '.');
fprintf(stderr, "%s\n", size >= MAX_DUMP ? "..." : "");
}
}
}
const uint8_t *cTPDU::GetData(const uint8_t *Data, int &Length)
{
if (size) {
Data = GetLength(Data, Length);
if (Length) {
Length--; // the first byte is always the tcid
return Data + 1;
}
}
return NULL;
}
uint8_t cTPDU::Status(void)
{
if (size >= 4 && buffer[size - 4] == T_SB && buffer[size - 3] == 2)
return buffer[size - 1];
return 0;
}
// --- cCiTransportConnection ------------------------------------------------
#define MAX_SESSIONS_PER_TC 16
class cCiTransportConnection {
private:
enum eState { stIDLE, stCREATION, stACTIVE, stDELETION };
cCamSlot *camSlot;
uint8_t tcid;
eState state;
bool createConnectionRequested;
bool deleteConnectionRequested;
bool hasUserIO;
cTimeMs alive;
cTimeMs timer;
cCiSession *sessions[MAX_SESSIONS_PER_TC + 1]; // session numbering starts with 1
void SendTPDU(uint8_t Tag, int Length = 0, const uint8_t *Data = NULL);
void SendTag(uint8_t Tag, uint16_t SessionId, uint32_t ResourceId = 0, int Status = -1);
void Poll(void);
uint32_t ResourceIdToInt(const uint8_t *Data);
cCiSession *GetSessionBySessionId(uint16_t SessionId);
void OpenSession(int Length, const uint8_t *Data);
void CloseSession(uint16_t SessionId);
void HandleSessions(cTPDU *TPDU);
public:
cCiTransportConnection(cCamSlot *CamSlot, uint8_t Tcid);
virtual ~cCiTransportConnection();
cCamSlot *CamSlot(void) { return camSlot; }
uint8_t Tcid(void) const { return tcid; }
void CreateConnection(void) { createConnectionRequested = true; }
void DeleteConnection(void) { deleteConnectionRequested = true; }
const char *GetCamName(void);
bool Ready(void);
bool HasUserIO(void) { return hasUserIO; }
void SendData(int Length, const uint8_t *Data);
bool Process(cTPDU *TPDU = NULL);
cCiSession *GetSessionByResourceId(uint32_t ResourceId);
};
// --- cCiSession ------------------------------------------------------------
// Session Tags:
#define ST_SESSION_NUMBER 0x90
#define ST_OPEN_SESSION_REQUEST 0x91
#define ST_OPEN_SESSION_RESPONSE 0x92
#define ST_CREATE_SESSION 0x93
#define ST_CREATE_SESSION_RESPONSE 0x94
#define ST_CLOSE_SESSION_REQUEST 0x95
#define ST_CLOSE_SESSION_RESPONSE 0x96
// Session Status:
#define SS_OK 0x00
#define SS_NOT_ALLOCATED 0xF0
// Resource Identifiers:
#define RI_RESOURCE_MANAGER 0x00010041
#define RI_APPLICATION_INFORMATION 0x00020041
#define RI_CONDITIONAL_ACCESS_SUPPORT 0x00030041
#define RI_HOST_CONTROL 0x00200041
#define RI_DATE_TIME 0x00240041
#define RI_MMI 0x00400041
// Application Object Tags:
#define AOT_NONE 0x000000
#define AOT_PROFILE_ENQ 0x9F8010
#define AOT_PROFILE 0x9F8011
#define AOT_PROFILE_CHANGE 0x9F8012
#define AOT_APPLICATION_INFO_ENQ 0x9F8020
#define AOT_APPLICATION_INFO 0x9F8021
#define AOT_ENTER_MENU 0x9F8022
#define AOT_CA_INFO_ENQ 0x9F8030
#define AOT_CA_INFO 0x9F8031
#define AOT_CA_PMT 0x9F8032
#define AOT_CA_PMT_REPLY 0x9F8033
#define AOT_TUNE 0x9F8400
#define AOT_REPLACE 0x9F8401
#define AOT_CLEAR_REPLACE 0x9F8402
#define AOT_ASK_RELEASE 0x9F8403
#define AOT_DATE_TIME_ENQ 0x9F8440
#define AOT_DATE_TIME 0x9F8441
#define AOT_CLOSE_MMI 0x9F8800
#define AOT_DISPLAY_CONTROL 0x9F8801
#define AOT_DISPLAY_REPLY 0x9F8802
#define AOT_TEXT_LAST 0x9F8803
#define AOT_TEXT_MORE 0x9F8804
#define AOT_KEYPAD_CONTROL 0x9F8805
#define AOT_KEYPRESS 0x9F8806
#define AOT_ENQ 0x9F8807
#define AOT_ANSW 0x9F8808
#define AOT_MENU_LAST 0x9F8809
#define AOT_MENU_MORE 0x9F880A
#define AOT_MENU_ANSW 0x9F880B
#define AOT_LIST_LAST 0x9F880C
#define AOT_LIST_MORE 0x9F880D
#define AOT_SUBTITLE_SEGMENT_LAST 0x9F880E
#define AOT_SUBTITLE_SEGMENT_MORE 0x9F880F
#define AOT_DISPLAY_MESSAGE 0x9F8810
#define AOT_SCENE_END_MARK 0x9F8811
#define AOT_SCENE_DONE 0x9F8812
#define AOT_SCENE_CONTROL 0x9F8813
#define AOT_SUBTITLE_DOWNLOAD_LAST 0x9F8814
#define AOT_SUBTITLE_DOWNLOAD_MORE 0x9F8815
#define AOT_FLUSH_DOWNLOAD 0x9F8816
#define AOT_DOWNLOAD_REPLY 0x9F8817
#define AOT_COMMS_CMD 0x9F8C00
#define AOT_CONNECTION_DESCRIPTOR 0x9F8C01
#define AOT_COMMS_REPLY 0x9F8C02
#define AOT_COMMS_SEND_LAST 0x9F8C03
#define AOT_COMMS_SEND_MORE 0x9F8C04
#define AOT_COMMS_RCV_LAST 0x9F8C05
#define AOT_COMMS_RCV_MORE 0x9F8C06
class cCiSession {
private:
uint16_t sessionId;
uint32_t resourceId;
cCiTransportConnection *tc;
protected:
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; }
virtual bool HasUserIO(void) { return false; }
virtual void Process(int Length = 0, const uint8_t *Data = NULL);
};
cCiSession::cCiSession(uint16_t SessionId, uint32_t ResourceId, cCiTransportConnection *Tc)
{
sessionId = SessionId;
resourceId = ResourceId;
tc = Tc;
}
cCiSession::~cCiSession()
{
}
int cCiSession::GetTag(int &Length, const uint8_t **Data)
///< Gets the tag at Data.
///< Returns the actual tag, or AOT_NONE in case of error.
///< Upon return Length and Data represent the remaining data after the tag has been skipped.
{
if (Length >= 3 && Data && *Data) {
int t = 0;
for (int i = 0; i < 3; i++)
t = (t << 8) | *(*Data)++;
Length -= 3;
return t;
}
return AOT_NONE;
}
const uint8_t *cCiSession::GetData(const uint8_t *Data, int &Length)
{
Data = GetLength(Data, Length);
return Length ? Data : NULL;
}
void cCiSession::SendData(int Tag, int Length, const uint8_t *Data)
{
uint8_t buffer[2048];
uint8_t *p = buffer;
*p++ = ST_SESSION_NUMBER;
*p++ = 0x02;
*p++ = (sessionId >> 8) & 0xFF;
*p++ = sessionId & 0xFF;
*p++ = (Tag >> 16) & 0xFF;
*p++ = (Tag >> 8) & 0xFF;
*p++ = Tag & 0xFF;
p = SetLength(p, Length);
if (p - buffer + Length < int(sizeof(buffer))) {
if (Data)
memcpy(p, Data, Length);
p += Length;
tc->SendData(p - buffer, buffer);
}
else
esyslog("ERROR: CAM %d: data length (%d) exceeds buffer size", Tc()->CamSlot()->SlotNumber(), Length);
}
void cCiSession::Process(int Length, const uint8_t *Data)
{
}
// --- cCiResourceManager ----------------------------------------------------
class cCiResourceManager : public cCiSession {
private:
int state;
public:
cCiResourceManager(uint16_t SessionId, cCiTransportConnection *Tc);
virtual void Process(int Length = 0, const uint8_t *Data = NULL);
};
cCiResourceManager::cCiResourceManager(uint16_t SessionId, cCiTransportConnection *Tc)
:cCiSession(SessionId, RI_RESOURCE_MANAGER, Tc)
{
dbgprotocol("Slot %d: new Resource Manager (session id %d)\n", Tc->CamSlot()->SlotNumber(), SessionId);
state = 0;
}
void cCiResourceManager::Process(int Length, const uint8_t *Data)
{
if (Data) {
int Tag = GetTag(Length, &Data);
switch (Tag) {
case AOT_PROFILE_ENQ: {
dbgprotocol("Slot %d: <== Profile Enquiry (%d)\n", Tc()->CamSlot()->SlotNumber(), SessionId());
uint32_t resources[] = { htonl(RI_RESOURCE_MANAGER),
htonl(RI_APPLICATION_INFORMATION),
htonl(RI_CONDITIONAL_ACCESS_SUPPORT),
htonl(RI_DATE_TIME),
htonl(RI_MMI)
};
dbgprotocol("Slot %d: ==> Profile (%d)\n", Tc()->CamSlot()->SlotNumber(), SessionId());
SendData(AOT_PROFILE, sizeof(resources), (uint8_t*)resources);
state = 3;
}
break;
case AOT_PROFILE: {
dbgprotocol("Slot %d: <== Profile (%d)\n", Tc()->CamSlot()->SlotNumber(), SessionId());
if (state == 1) {
int l = 0;
const uint8_t *d = GetData(Data, l);
if (l > 0 && d)
esyslog("ERROR: CAM %d: resource manager: unexpected data", Tc()->CamSlot()->SlotNumber());
dbgprotocol("Slot %d: ==> Profile Change (%d)\n", Tc()->CamSlot()->SlotNumber(), SessionId());
SendData(AOT_PROFILE_CHANGE);
state = 2;
}
else {
esyslog("ERROR: CAM %d: resource manager: unexpected tag %06X in state %d", Tc()->CamSlot()->SlotNumber(), Tag, state);
}
}
break;
default: esyslog("ERROR: CAM %d: resource manager: unknown tag %06X", Tc()->CamSlot()->SlotNumber(), Tag);
}
}
else if (state == 0) {
dbgprotocol("Slot %d: ==> Profile Enq (%d)\n", Tc()->CamSlot()->SlotNumber(), SessionId());
SendData(AOT_PROFILE_ENQ);
state = 1;
}
}
// --- cCiApplicationInformation ---------------------------------------------
class cCiApplicationInformation : public cCiSession {
private:
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; }
};
cCiApplicationInformation::cCiApplicationInformation(uint16_t SessionId, cCiTransportConnection *Tc)
:cCiSession(SessionId, RI_APPLICATION_INFORMATION, Tc)
{
dbgprotocol("Slot %d: new Application Information (session id %d)\n", Tc->CamSlot()->SlotNumber(), SessionId);
state = 0;
menuString = NULL;
}
cCiApplicationInformation::~cCiApplicationInformation()
{
free(menuString);
}
void cCiApplicationInformation::Process(int Length, const uint8_t *Data)
{
if (Data) {
int Tag = GetTag(Length, &Data);
switch (Tag) {
case AOT_APPLICATION_INFO: {
dbgprotocol("Slot %d: <== Application Info (%d)\n", Tc()->CamSlot()->SlotNumber(), SessionId());
int l = 0;
const uint8_t *d = GetData(Data, l);
if ((l -= 1) < 0) break;
applicationType = *d++;
if ((l -= 2) < 0) break;
applicationManufacturer = ntohs(get_unaligned((uint16_t *)d));
d += 2;
if ((l -= 2) < 0) break;
manufacturerCode = ntohs(get_unaligned((uint16_t *)d));
d += 2;
free(menuString);
menuString = GetString(l, &d);
isyslog("CAM %d: %s, %02X, %04X, %04X", Tc()->CamSlot()->SlotNumber(), menuString, applicationType, applicationManufacturer, manufacturerCode);
state = 2;
}
break;
default: esyslog("ERROR: CAM %d: application information: unknown tag %06X", Tc()->CamSlot()->SlotNumber(), Tag);
}
}
else if (state == 0) {
dbgprotocol("Slot %d: ==> Application Info Enq (%d)\n", Tc()->CamSlot()->SlotNumber(), SessionId());
SendData(AOT_APPLICATION_INFO_ENQ);
state = 1;
}
}
bool cCiApplicationInformation::EnterMenu(void)
{
if (state == 2) {
dbgprotocol("Slot %d: ==> Enter Menu (%d)\n", Tc()->CamSlot()->SlotNumber(), SessionId());
SendData(AOT_ENTER_MENU);
return true;
}
return false;
}
// --- cCiCaPmt --------------------------------------------------------------
#define MAXCASYSTEMIDS 64
// Ca Pmt List Management:
#define CPLM_MORE 0x00
#define CPLM_FIRST 0x01
#define CPLM_LAST 0x02
#define CPLM_ONLY 0x03
#define CPLM_ADD 0x04
#define CPLM_UPDATE 0x05
// Ca Pmt Cmd Ids:
#define CPCI_OK_DESCRAMBLING 0x01
#define CPCI_OK_MMI 0x02
#define CPCI_QUERY 0x03
#define CPCI_NOT_SELECTED 0x04
class cCiCaPmt {
friend class cCiConditionalAccessSupport;
private:
uint8_t cmdId;
int length;
int esInfoLengthPos;
uint8_t capmt[2048]; ///< XXX is there a specified maximum?
int source;
int transponder;
int programNumber;
int caSystemIds[MAXCASYSTEMIDS + 1]; // list is zero terminated!
void AddCaDescriptors(int Length, const uint8_t *Data);
public:
cCiCaPmt(uint8_t CmdId, int Source, int Transponder, int ProgramNumber, const int *CaSystemIds);
uint8_t CmdId(void) { return cmdId; }
void SetListManagement(uint8_t ListManagement);
uint8_t ListManagement(void) { return capmt[0]; }
void AddPid(int Pid, uint8_t StreamType);
};
cCiCaPmt::cCiCaPmt(uint8_t CmdId, int Source, int Transponder, int ProgramNumber, const int *CaSystemIds)
{
cmdId = CmdId;
source = Source;
transponder = Transponder;
programNumber = ProgramNumber;
int i = 0;
if (CaSystemIds) {
for (; CaSystemIds[i]; i++)
caSystemIds[i] = CaSystemIds[i];
}
caSystemIds[i] = 0;
uint8_t caDescriptors[512];
int caDescriptorsLength = GetCaDescriptors(source, transponder, programNumber, caSystemIds, sizeof(caDescriptors), caDescriptors, 0);
length = 0;
capmt[length++] = CPLM_ONLY;
capmt[length++] = (ProgramNumber >> 8) & 0xFF;
capmt[length++] = ProgramNumber & 0xFF;
capmt[length++] = 0x01; // version_number, current_next_indicator - apparently vn doesn't matter, but cni must be 1
esInfoLengthPos = length;
capmt[length++] = 0x00; // program_info_length H (at program level)
capmt[length++] = 0x00; // program_info_length L
AddCaDescriptors(caDescriptorsLength, caDescriptors);
}
void cCiCaPmt::SetListManagement(uint8_t ListManagement)
{
capmt[0] = ListManagement;
}
void cCiCaPmt::AddPid(int Pid, uint8_t StreamType)
{
if (Pid) {
uint8_t caDescriptors[512];
int caDescriptorsLength = GetCaDescriptors(source, transponder, programNumber, caSystemIds, sizeof(caDescriptors), caDescriptors, Pid);
//XXX buffer overflow check???
capmt[length++] = StreamType;
capmt[length++] = (Pid >> 8) & 0xFF;
capmt[length++] = Pid & 0xFF;
esInfoLengthPos = length;
capmt[length++] = 0x00; // ES_info_length H (at ES level)
capmt[length++] = 0x00; // ES_info_length L
AddCaDescriptors(caDescriptorsLength, caDescriptors);
}
}
void cCiCaPmt::AddCaDescriptors(int Length, const uint8_t *Data)
{
if (esInfoLengthPos) {
if (length + Length < int(sizeof(capmt))) {
if (Length || cmdId == CPCI_QUERY) {
capmt[length++] = cmdId;
memcpy(capmt + length, Data, Length);
length += Length;
int l = length - esInfoLengthPos - 2;
capmt[esInfoLengthPos] = (l >> 8) & 0xFF;
capmt[esInfoLengthPos + 1] = l & 0xFF;
}
}
else
esyslog("ERROR: buffer overflow in CA descriptor");
esInfoLengthPos = 0;
}
else
esyslog("ERROR: adding CA descriptor without Pid!");
}
// --- cCiConditionalAccessSupport -------------------------------------------
// CA Enable Ids:
#define CAEI_POSSIBLE 0x01
#define CAEI_POSSIBLE_COND_PURCHASE 0x02
#define CAEI_POSSIBLE_COND_TECHNICAL 0x03
#define CAEI_NOT_POSSIBLE_ENTITLEMENT 0x71
#define CAEI_NOT_POSSIBLE_TECHNICAL 0x73
#define CA_ENABLE_FLAG 0x80
#define CA_ENABLE(x) (((x) & CA_ENABLE_FLAG) ? (x) & ~CA_ENABLE_FLAG : 0)
#define QUERY_WAIT_TIME 1000 // ms to wait before sending a query
#define QUERY_REPLY_TIMEOUT 2000 // ms to wait for a reply to a query
class cCiConditionalAccessSupport : public cCiSession {
private:
int state;
int numCaSystemIds;
int caSystemIds[MAXCASYSTEMIDS + 1]; // list is zero terminated!
bool repliesToQuery;
cTimeMs timer;
public:
cCiConditionalAccessSupport(uint16_t SessionId, cCiTransportConnection *Tc);
virtual void Process(int Length = 0, const uint8_t *Data = NULL);
const int *GetCaSystemIds(void) { return caSystemIds; }
void SendPMT(cCiCaPmt *CaPmt);
bool RepliesToQuery(void) { return repliesToQuery; }
bool Ready(void) { return state >= 4; }
bool ReceivedReply(void) { return state >= 5; }
bool CanDecrypt(void) { return state == 6; }
};
cCiConditionalAccessSupport::cCiConditionalAccessSupport(uint16_t SessionId, cCiTransportConnection *Tc)
:cCiSession(SessionId, RI_CONDITIONAL_ACCESS_SUPPORT, Tc)
{
dbgprotocol("Slot %d: new Conditional Access Support (session id %d)\n", Tc->CamSlot()->SlotNumber(), SessionId);
state = 0; // inactive
caSystemIds[numCaSystemIds = 0] = 0;
repliesToQuery = false;
}
void cCiConditionalAccessSupport::Process(int Length, const uint8_t *Data)
{
if (Data) {
int Tag = GetTag(Length, &Data);
switch (Tag) {
case AOT_CA_INFO: {
dbgprotocol("Slot %d: <== Ca Info (%d)", Tc()->CamSlot()->SlotNumber(), SessionId());
numCaSystemIds = 0;
int l = 0;
const uint8_t *d = GetData(Data, l);
while (l > 1) {
uint16_t id = ((uint16_t)(*d) << 8) | *(d + 1);
dbgprotocol(" %04X", id);
d += 2;
l -= 2;
if (numCaSystemIds < MAXCASYSTEMIDS)
caSystemIds[numCaSystemIds++] = id;
else {
esyslog("ERROR: CAM %d: too many CA system IDs!", Tc()->CamSlot()->SlotNumber());
break;
}
}
caSystemIds[numCaSystemIds] = 0;
dbgprotocol("\n");
if (state == 1) {
timer.Set(QUERY_WAIT_TIME); // WORKAROUND: Alphacrypt 3.09 doesn't reply to QUERY immediately after reset
state = 2; // got ca info
}
}
break;
case AOT_CA_PMT_REPLY: {
dbgprotocol("Slot %d: <== Ca Pmt Reply (%d)", Tc()->CamSlot()->SlotNumber(), SessionId());
if (!repliesToQuery) {
dsyslog("CAM %d: replies to QUERY - multi channel decryption possible", Tc()->CamSlot()->SlotNumber());
repliesToQuery = true;
}
state = 5; // got ca pmt reply
int l = 0;
const uint8_t *d = GetData(Data, l);
if (l > 1) {
uint16_t pnr = ((uint16_t)(*d) << 8) | *(d + 1);
dbgprotocol(" %d", pnr);
d += 2;
l -= 2;
if (l > 0) {
dbgprotocol(" %02X", *d);
d += 1;
l -= 1;
if (l > 0) {
if (l % 3 == 0 && l > 1) {
// The EN50221 standard defines that the next byte is supposed
// to be the CA_enable value at programme level. However, there are
// CAMs (for instance the AlphaCrypt with firmware <= 3.05) that
// insert a two byte length field here.
// This is a workaround to skip this length field:
uint16_t len = ((uint16_t)(*d) << 8) | *(d + 1);
if (len == l - 2) {
d += 2;
l -= 2;
}
}
unsigned char caepl = *d;
dbgprotocol(" %02X", caepl);
d += 1;
l -= 1;
bool ok = true;
if (l <= 2)
ok = CA_ENABLE(caepl) == CAEI_POSSIBLE;
while (l > 2) {
uint16_t pid = ((uint16_t)(*d) << 8) | *(d + 1);
unsigned char caees = *(d + 2);
dbgprotocol(" %d=%02X", pid, caees);
d += 3;
l -= 3;
if (CA_ENABLE(caees) != CAEI_POSSIBLE)
ok = false;
}
if (ok)
state = 6; // descrambling possible
}
}
}
dbgprotocol("\n");
}
break;
default: esyslog("ERROR: CAM %d: conditional access support: unknown tag %06X", Tc()->CamSlot()->SlotNumber(), Tag);
}
}
else if (state == 0) {
dbgprotocol("Slot %d: ==> Ca Info Enq (%d)\n", Tc()->CamSlot()->SlotNumber(), SessionId());
SendData(AOT_CA_INFO_ENQ);
state = 1; // enquired ca info
}
else if (state == 2 && timer.TimedOut()) {
cCiCaPmt CaPmt(CPCI_QUERY, 0, 0, 0, NULL);
SendPMT(&CaPmt);
timer.Set(QUERY_REPLY_TIMEOUT);
state = 3; // waiting for reply
}
else if (state == 3 && timer.TimedOut()) {
dsyslog("CAM %d: doesn't reply to QUERY - only a single channel can be decrypted", Tc()->CamSlot()->SlotNumber());
state = 4; // normal operation
}
}
void cCiConditionalAccessSupport::SendPMT(cCiCaPmt *CaPmt)
{
if (CaPmt && state >= 2) {
dbgprotocol("Slot %d: ==> Ca Pmt (%d) %d %d\n", Tc()->CamSlot()->SlotNumber(), SessionId(), CaPmt->ListManagement(), CaPmt->CmdId());
SendData(AOT_CA_PMT, CaPmt->length, CaPmt->capmt);
state = 4; // sent ca pmt
}
}
// --- cCiDateTime -----------------------------------------------------------
class cCiDateTime : public cCiSession {
private:
int interval;
time_t lastTime;
void SendDateTime(void);
public:
cCiDateTime(uint16_t SessionId, cCiTransportConnection *Tc);
virtual void Process(int Length = 0, const uint8_t *Data = NULL);
};
cCiDateTime::cCiDateTime(uint16_t SessionId, cCiTransportConnection *Tc)
:cCiSession(SessionId, RI_DATE_TIME, Tc)
{
interval = 0;
lastTime = 0;
dbgprotocol("Slot %d: new Date Time (session id %d)\n", Tc->CamSlot()->SlotNumber(), SessionId);
}
void cCiDateTime::SendDateTime(void)
{
time_t t = time(NULL);
struct tm tm_gmt;
struct tm tm_loc;
if (gmtime_r(&t, &tm_gmt) && localtime_r(&t, &tm_loc)) {
int Y = tm_gmt.tm_year;
int M = tm_gmt.tm_mon + 1;
int D = tm_gmt.tm_mday;
int L = (M == 1 || M == 2) ? 1 : 0;
int MJD = 14956 + D + int((Y - L) * 365.25) + int((M + 1 + L * 12) * 30.6001);
#define DEC2BCD(d) uint8_t(((d / 10) << 4) + (d % 10))
struct tTime { uint16_t mjd; uint8_t h, m, s; short offset; };
tTime T = { mjd : htons(MJD), h : DEC2BCD(tm_gmt.tm_hour), m : DEC2BCD(tm_gmt.tm_min), s : DEC2BCD(tm_gmt.tm_sec), offset : short(htons(tm_loc.tm_gmtoff / 60)) };
bool OldDumpTPDUDataTransfer = DumpTPDUDataTransfer;
DumpTPDUDataTransfer &= DumpDateTime;
if (DumpDateTime)
dbgprotocol("Slot %d: ==> Date Time (%d)\n", Tc()->CamSlot()->SlotNumber(), SessionId());
SendData(AOT_DATE_TIME, 7, (uint8_t*)&T);
DumpTPDUDataTransfer = OldDumpTPDUDataTransfer;
}
}
void cCiDateTime::Process(int Length, const uint8_t *Data)
{
if (Data) {
int Tag = GetTag(Length, &Data);
switch (Tag) {
case AOT_DATE_TIME_ENQ: {
interval = 0;
int l = 0;
const uint8_t *d = GetData(Data, l);
if (l > 0)
interval = *d;
dbgprotocol("Slot %d: <== Date Time Enq (%d), interval = %d\n", Tc()->CamSlot()->SlotNumber(), SessionId(), interval);
lastTime = time(NULL);
SendDateTime();
}
break;
default: esyslog("ERROR: CAM %d: date time: unknown tag %06X", Tc()->CamSlot()->SlotNumber(), Tag);
}
}
else if (interval && time(NULL) - lastTime > interval) {
lastTime = time(NULL);
SendDateTime();
}
}
// --- cCiMMI ----------------------------------------------------------------
// Display Control Commands:
#define DCC_SET_MMI_MODE 0x01
#define DCC_DISPLAY_CHARACTER_TABLE_LIST 0x02
#define DCC_INPUT_CHARACTER_TABLE_LIST 0x03
#define DCC_OVERLAY_GRAPHICS_CHARACTERISTICS 0x04
#define DCC_FULL_SCREEN_GRAPHICS_CHARACTERISTICS 0x05
// MMI Modes:
#define MM_HIGH_LEVEL 0x01
#define MM_LOW_LEVEL_OVERLAY_GRAPHICS 0x02
#define MM_LOW_LEVEL_FULL_SCREEN_GRAPHICS 0x03
// Display Reply IDs:
#define DRI_MMI_MODE_ACK 0x01
#define DRI_LIST_DISPLAY_CHARACTER_TABLES 0x02
#define DRI_LIST_INPUT_CHARACTER_TABLES 0x03
#define DRI_LIST_GRAPHIC_OVERLAY_CHARACTERISTICS 0x04
#define DRI_LIST_FULL_SCREEN_GRAPHIC_CHARACTERISTICS 0x05
#define DRI_UNKNOWN_DISPLAY_CONTROL_CMD 0xF0
#define DRI_UNKNOWN_MMI_MODE 0xF1
#define DRI_UNKNOWN_CHARACTER_TABLE 0xF2
// Enquiry Flags:
#define EF_BLIND 0x01
// Answer IDs:
#define AI_CANCEL 0x00
#define AI_ANSWER 0x01
class cCiMMI : public cCiSession {
private:
char *GetText(int &Length, const uint8_t **Data);
cCiMenu *menu, *fetchedMenu;
cCiEnquiry *enquiry, *fetchedEnquiry;
public:
cCiMMI(uint16_t SessionId, cCiTransportConnection *Tc);
virtual ~cCiMMI();
virtual void Process(int Length = 0, const uint8_t *Data = NULL);
virtual bool HasUserIO(void) { return menu || enquiry; }
cCiMenu *Menu(bool Clear = false);
cCiEnquiry *Enquiry(bool Clear = false);
void SendMenuAnswer(uint8_t Selection);
bool SendAnswer(const char *Text);
bool SendCloseMMI(void);
};
cCiMMI::cCiMMI(uint16_t SessionId, cCiTransportConnection *Tc)
:cCiSession(SessionId, RI_MMI, Tc)
{
dbgprotocol("Slot %d: new MMI (session id %d)\n", Tc->CamSlot()->SlotNumber(), SessionId);
menu = fetchedMenu = NULL;
enquiry = fetchedEnquiry = NULL;
}
cCiMMI::~cCiMMI()
{
if (fetchedMenu) {
cMutexLock MutexLock(fetchedMenu->mutex);
fetchedMenu->mmi = NULL;
}
delete menu;
if (fetchedEnquiry) {
cMutexLock MutexLock(fetchedEnquiry->mutex);
fetchedEnquiry->mmi = NULL;
}
delete enquiry;
}
char *cCiMMI::GetText(int &Length, const uint8_t **Data)
///< Gets the text at Data.
///< Returns a pointer to a newly allocated string, or NULL in case of error.
///< Upon return Length and Data represent the remaining data after the text has been skipped.
{
int Tag = GetTag(Length, Data);
if (Tag == AOT_TEXT_LAST) {
char *s = GetString(Length, Data);
dbgprotocol("Slot %d: <== Text Last (%d) '%s'\n", Tc()->CamSlot()->SlotNumber(), SessionId(), s);
return s;
}
else
esyslog("ERROR: CAM %d: MMI: unexpected text tag: %06X", Tc()->CamSlot()->SlotNumber(), Tag);
return NULL;
}
void cCiMMI::Process(int Length, const uint8_t *Data)
{
if (Data) {
int Tag = GetTag(Length, &Data);
switch (Tag) {
case AOT_DISPLAY_CONTROL: {
dbgprotocol("Slot %d: <== Display Control (%d)\n", Tc()->CamSlot()->SlotNumber(), SessionId());
int l = 0;
const uint8_t *d = GetData(Data, l);
if (l > 0) {
switch (*d) {
case DCC_SET_MMI_MODE:
if (l == 2 && *++d == MM_HIGH_LEVEL) {