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vdr/ci.c

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Implemented 'Link Layer' based CAM support
2003-01-06 14:44:27 +01:00
/*
* ci.c: Common Interface
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: ci.c 1.1 2003/01/06 13:56:17 kls Exp $
*/
/* XXX TODO
- handle slots separately
- use return values
- update CA descriptors in case they change
- dynamically react on CAM insert/remove
- implement CAM reset (per slot)
- implement a CA enquiry menu with actual user input
XXX*/
#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 "tools.h"
/* these might come in handy in case you want to use this code without VDR's other files:
#ifndef MALLOC
#define MALLOC(type, size) (type *)malloc(sizeof(type) * (size))
#endif
#ifndef esyslog
static int SysLogLevel = 3;
#define esyslog(a...) void( (SysLogLevel > 0) ? void(fprintf(stderr, a)), void(fprintf(stderr, "\n")) : void() )
#define isyslog(a...) void( (SysLogLevel > 1) ? void(fprintf(stderr, a)), void(fprintf(stderr, "\n")) : void() )
#define dsyslog(a...) void( (SysLogLevel > 2) ? void(fprintf(stderr, a)), void(fprintf(stderr, "\n")) : void() )
#endif
*/
// Set these to 'true' for debug output:
static bool DumpTPDUDataTransfer = false;
static bool DebugProtocol = false;
#define dbgprotocol(a...) if (DebugProtocol) printf(a)
#define OK 0
#define TIMEOUT -1
#define ERROR -2
// --- Workarounds -----------------------------------------------------------
// The Irdeto AllCAM 4.7 (and maybe others, too) does not react on AOT_ENTER_MENU
// during the first few seconds of a newly established connection
#define WRKRND_TIME_BEFORE_ENTER_MENU 15 // seconds
// --- 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.
///< \return 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.
///< \return 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.
///< \return Returns a pointer to a newly allocated string.
{
char *s = MALLOC(char, Length + 1);
strncpy(s, (char *)Data, Length);
s[Length] = 0;
return s;
}
static char *GetString(int &Length, const uint8_t **Data)
///< Gets the string at Data.
///< \return 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;
}
// --- 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 data[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 data[0]; }
uint8_t Tcid(void) { return data[1]; }
uint8_t Tag(void) { return data[2]; }
const uint8_t *Data(int &Length) { return GetData(data + 3, Length); }
uint8_t Status(void);
int Write(int fd);
int Read(int fd);
void Dump(bool Outgoing);
};
cTPDU::cTPDU(uint8_t Slot, uint8_t Tcid, uint8_t Tag, int Length, const uint8_t *Data)
{
size = 0;
data[0] = Slot;
data[1] = Tcid;
data[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:
data[3] = 1; // length
data[4] = Tcid;
size = 5;
break;
case T_NEW_TC:
case T_TC_ERROR:
if (Length == 1) {
data[3] = 2; // length
data[4] = Tcid;
data[5] = Data[0];
size = 6;
}
else
esyslog("ERROR: illegal data length for TPDU tag 0x%02X: %d", Tag, Length);
break;
case T_DATA_LAST:
case T_DATA_MORE:
if (Length <= MAX_TPDU_DATA) {
uint8_t *p = data + 3;
p = SetLength(p, Length + 1);
*p++ = Tcid;
if (Length)
memcpy(p, Data, Length);
size = Length + (p - data);
}
else
esyslog("ERROR: illegal data length for TPDU tag 0x%02X: %d", Tag, Length);
break;
default:
esyslog("ERROR: unknown TPDU tag: 0x%02X", Tag);
}
}
int cTPDU::Write(int fd)
{
Dump(true);
if (size)
return write(fd, data, size) == size ? OK : ERROR;
esyslog("ERROR: attemp to write TPDU with zero size");
return ERROR;
}
int cTPDU::Read(int fd)
{
size = read(fd, data, sizeof(data));
if (size < 0) {
esyslog("ERROR: %m");
size = 0;
return ERROR;
}
Dump(false);
return OK;
}
void cTPDU::Dump(bool Outgoing)
{
if (DumpTPDUDataTransfer) {
#define MAX_DUMP 256
printf("%s ", Outgoing ? "-->" : "<--");
for (int i = 0; i < size && i < MAX_DUMP; i++)
printf("%02X ", data[i]);
printf("%s\n", size >= MAX_DUMP ? "..." : "");
if (!Outgoing) {
printf(" ");
for (int i = 0; i < size && i < MAX_DUMP; i++)
printf("%2c ", isprint(data[i]) ? data[i] : '.');
printf("%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 && data[size - 4] == T_SB && data[size - 3] == 2) {
//XXX test tcid???
return data[size - 1];
}
return 0;
}
// --- cCiTransportConnection ------------------------------------------------
enum eState { stIDLE, stCREATION, stACTIVE, stDELETION };
class cCiTransportConnection {
friend class cCiTransportLayer;
private:
int fd;
uint8_t slot;
uint8_t tcid;
eState state;
cTPDU *tpdu;
int lastResponse;
bool dataAvailable;
void Init(int Fd, uint8_t Slot, uint8_t Tcid);
int SendTPDU(uint8_t Tag, int Length = 0, const uint8_t *Data = NULL);
int RecvTPDU(void);
int CreateConnection(void);
int Poll(void);
eState State(void) { return state; }
int LastResponse(void) { return lastResponse; }
bool DataAvailable(void) { return dataAvailable; }
public:
cCiTransportConnection(void);
~cCiTransportConnection();
int SendData(int Length, const uint8_t *Data);
int RecvData(void);
const uint8_t *Data(int &Length);
//XXX Close()
};
cCiTransportConnection::cCiTransportConnection(void)
{
tpdu = NULL;
Init(-1, 0, 0);
}
cCiTransportConnection::~cCiTransportConnection()
{
delete tpdu;
}
void cCiTransportConnection::Init(int Fd, uint8_t Slot, uint8_t Tcid)
{
fd = Fd;
slot = Slot;
tcid = Tcid;
state = stIDLE;
if (fd >= 0 && !tpdu)
tpdu = new cTPDU;
lastResponse = ERROR;
dataAvailable = false;
//XXX Clear()???
}
int cCiTransportConnection::SendTPDU(uint8_t Tag, int Length, const uint8_t *Data)
{
cTPDU TPDU(slot, tcid, Tag, Length, Data);
return TPDU.Write(fd);
}
int cCiTransportConnection::RecvTPDU(void)
{
//XXX poll, timeout???
struct pollfd pfd[1];
pfd[0].fd = fd;
pfd[0].events = POLLIN;
if (poll(pfd, 1, 3500/*XXX*/) && (pfd[0].revents & POLLIN))//XXX
if (tpdu->Read(fd) == OK && tpdu->Tcid() == tcid) {
switch (state) {
case stIDLE: break;
case stCREATION: if (tpdu->Tag() == T_CTC_REPLY) {
dataAvailable = tpdu->Status() & DATA_INDICATOR;
state = stACTIVE;
return tpdu->Tag();
}
break;
case stACTIVE: switch (tpdu->Tag()) {
case T_SB:
case T_DATA_LAST:
case T_DATA_MORE:
case T_REQUEST_TC: break;
case T_DELETE_TC: if (SendTPDU(T_DTC_REPLY) != OK)
return ERROR;
Init(fd, slot, tcid);
break;
default: return ERROR;
}
dataAvailable = tpdu->Status() & DATA_INDICATOR;
return tpdu->Tag();
break;
case stDELETION: if (tpdu->Tag() == T_DTC_REPLY) {
Init(fd, slot, tcid);
//XXX Status()???
return tpdu->Tag();
}
break;
}
}
return ERROR;
}
int cCiTransportConnection::SendData(int Length, const uint8_t *Data)
{
while (state == stACTIVE && Length > 0) {
uint8_t Tag = T_DATA_LAST;
int l = Length;
if (l > MAX_TPDU_DATA) {
Tag = T_DATA_MORE;
l = MAX_TPDU_DATA;
}
if (SendTPDU(Tag, l, Data) != OK || RecvTPDU() != T_SB)
break;
Length -= l;
Data += l;
}
return Length ? ERROR : OK;
}
int cCiTransportConnection::RecvData(void)
{
if (SendTPDU(T_RCV) == OK) {
if (RecvTPDU() == OK) {
//XXX
}
}
return ERROR;
}
const uint8_t *cCiTransportConnection::Data(int &Length)
{
return tpdu->Data(Length);
}
int cCiTransportConnection::CreateConnection(void)
{
if (state == stIDLE) {
if (SendTPDU(T_CREATE_TC) == OK) {
state = stCREATION;
return OK;
}
}
return ERROR;
}
int cCiTransportConnection::Poll(void)
{
if (state == stACTIVE) {
if (SendTPDU(T_DATA_LAST) == OK) {
return lastResponse = RecvTPDU();
}
}
return ERROR;
}
// --- cCiTransportLayer -----------------------------------------------------
#define MAX_CI_CONNECT 16 // maximum possible value is 254
class cCiTransportLayer {
private:
int fd;
int numSlots;
cCiTransportConnection tc[MAX_CI_CONNECT];
bool ResetSlot(int Slot);
public:
cCiTransportLayer(int Fd, int NumSlots);
cCiTransportConnection *NewConnection(void);
int Process(void);
};
cCiTransportLayer::cCiTransportLayer(int Fd, int NumSlots)
{
fd = Fd;
numSlots = NumSlots;
for (int s = 0; s < numSlots; s++)
ResetSlot(s);
for (int i = 0; i < MAX_CI_CONNECT; i++)
tc[i].Init(fd, 0/*XXX*/, i + 1);
}
cCiTransportConnection *cCiTransportLayer::NewConnection(void)
{
for (int i = 0; i < MAX_CI_CONNECT; i++) {
if (tc[i].State() == stIDLE) {
if (tc[i].CreateConnection() == OK) {
if (tc[i].RecvTPDU() == T_CTC_REPLY)
return &tc[i];
}
break;
}
}
return NULL;
}
#define CA_RESET_TIMEOUT 2 // seconds
bool cCiTransportLayer::ResetSlot(int Slot)
{
ca_slot_info_t sinfo;
sinfo.num = Slot;
ioctl(fd, CA_RESET, Slot);
time_t t0 = time(NULL);
do {
ioctl(fd, CA_GET_SLOT_INFO, &sinfo);
if ((sinfo.flags & CA_CI_MODULE_READY) != 0)
return true;
} while (time(NULL) - t0 < CA_RESET_TIMEOUT);
return false;
}
int cCiTransportLayer::Process(void)
{
for (int i = 0; i < MAX_CI_CONNECT; i++) {
cCiTransportConnection *Tc = &tc[i];
if (Tc->State() == stACTIVE) {
if (!Tc->DataAvailable()) {
if (Tc->Poll() != OK)
;//XXX continue;
}
switch (Tc->LastResponse()) {
case T_REQUEST_TC:
//XXX
break;
case T_DATA_MORE:
case T_DATA_LAST:
case T_CTC_REPLY:
case T_SB:
if (Tc->DataAvailable())
Tc->RecvData();
break;
case TIMEOUT:
case ERROR:
default:
//XXX Tc->state = stIDLE;//XXX Init()???
break;
}
}
}
return OK;
}
// -- 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:
int sessionId;
int resourceId;
cCiTransportConnection *tc;
protected:
int GetTag(int &Length, const uint8_t **Data);
const uint8_t *GetData(const uint8_t *Data, int &Length);
int SendData(int Tag, int Length = 0, const uint8_t *Data = NULL);
public:
cCiSession(int SessionId, int ResourceId, cCiTransportConnection *Tc);
virtual ~cCiSession();
int SessionId(void) { return sessionId; }
int ResourceId(void) { return resourceId; }
virtual bool Process(int Length = 0, const uint8_t *Data = NULL);
};
cCiSession::cCiSession(int SessionId, int 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.
///< \return 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;
}
int 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 < sizeof(buffer)) {
memcpy(p, Data, Length);
p += Length;
return tc->SendData(p - buffer, buffer);
}
esyslog("ERROR: CAM: data length (%d) exceeds buffer size", Length);
return ERROR;
}
bool cCiSession::Process(int Length, const uint8_t *Data)
{
return true;
}
// -- cCiResourceManager -----------------------------------------------------
class cCiResourceManager : public cCiSession {
private:
int state;
public:
cCiResourceManager(int SessionId, cCiTransportConnection *Tc);
virtual bool Process(int Length = 0, const uint8_t *Data = NULL);
};
cCiResourceManager::cCiResourceManager(int SessionId, cCiTransportConnection *Tc)
:cCiSession(SessionId, RI_RESOURCE_MANAGER, Tc)
{
dbgprotocol("New Resource Manager (session id %d)\n", SessionId);
state = 0;
}
bool cCiResourceManager::Process(int Length, const uint8_t *Data)
{
if (Data) {
int Tag = GetTag(Length, &Data);
switch (Tag) {
case AOT_PROFILE_ENQ: {
dbgprotocol("%d: <== Profile Enquiry\n", SessionId());
int resources[] = { htonl(RI_RESOURCE_MANAGER),
htonl(RI_APPLICATION_INFORMATION),
htonl(RI_CONDITIONAL_ACCESS_SUPPORT),
htonl(RI_DATE_TIME),
htonl(RI_MMI)
};
dbgprotocol("%d: ==> Profile\n", SessionId());
SendData(AOT_PROFILE, sizeof(resources), (uint8_t*)resources);
state = 3;
}
break;
case AOT_PROFILE: {
dbgprotocol("%d: <== Profile\n", SessionId());
if (state == 1) {
int l = 0;
const uint8_t *d = GetData(Data, l);
if (l > 0 && d)
esyslog("CI resource manager: unexpected data");
dbgprotocol("%d: ==> Profile Change\n", SessionId());
SendData(AOT_PROFILE_CHANGE);
state = 2;
}
else {
esyslog("ERROR: CI resource manager: unexpected tag %06X in state %d", Tag, state);
}
}
break;
default: esyslog("ERROR: CI resource manager: unknown tag %06X", Tag);
return false;
}
}
else if (state == 0) {
dbgprotocol("%d: ==> Profile Enq\n", SessionId());
SendData(AOT_PROFILE_ENQ);
state = 1;
}
return true;
}
// --- cCiApplicationInformation ---------------------------------------------
class cCiApplicationInformation : public cCiSession {
private:
int state;
time_t creationTime;
uint8_t applicationType;
uint16_t applicationManufacturer;
uint16_t manufacturerCode;
char *menuString;
public:
cCiApplicationInformation(int SessionId, cCiTransportConnection *Tc);
virtual ~cCiApplicationInformation();
virtual bool Process(int Length = 0, const uint8_t *Data = NULL);
bool EnterMenu(void);
};
cCiApplicationInformation::cCiApplicationInformation(int SessionId, cCiTransportConnection *Tc)
:cCiSession(SessionId, RI_APPLICATION_INFORMATION, Tc)
{
dbgprotocol("New Aplication Information (session id %d)\n", SessionId);
state = 0;
creationTime = time(NULL);
menuString = NULL;
}
cCiApplicationInformation::~cCiApplicationInformation()
{
free(menuString);
}
bool cCiApplicationInformation::Process(int Length, const uint8_t *Data)
{
if (Data) {
int Tag = GetTag(Length, &Data);
switch (Tag) {
case AOT_APPLICATION_INFO: {
dbgprotocol("%d: <== Application Info\n", 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(*(uint16_t *)d);
d += 2;
if ((l -= 2) < 0) break;
manufacturerCode = ntohs(*(uint16_t *)d);
d += 2;
free(menuString);
menuString = GetString(l, &d);
isyslog("CAM: %s, %02X, %04X, %04X", menuString, applicationType, applicationManufacturer, manufacturerCode);//XXX make externally accessible!
}
state = 2;
break;
default: esyslog("ERROR: CI application information: unknown tag %06X", Tag);
return false;
}
}
else if (state == 0) {
dbgprotocol("%d: ==> Application Info Enq\n", SessionId());
SendData(AOT_APPLICATION_INFO_ENQ);
state = 1;
}
return true;
}
bool cCiApplicationInformation::EnterMenu(void)
{
if (state == 2 && time(NULL) - creationTime > WRKRND_TIME_BEFORE_ENTER_MENU) {
dbgprotocol("%d: ==> Enter Menu\n", SessionId());
SendData(AOT_ENTER_MENU);
return true;//XXX
}
return false;
}
// --- cCiConditionalAccessSupport -------------------------------------------
class cCiConditionalAccessSupport : public cCiSession {
private:
int state;
public:
cCiConditionalAccessSupport(int SessionId, cCiTransportConnection *Tc);
virtual bool Process(int Length = 0, const uint8_t *Data = NULL);
bool SendPMT(cCiCaPmt &CaPmt);
};
cCiConditionalAccessSupport::cCiConditionalAccessSupport(int SessionId, cCiTransportConnection *Tc)
:cCiSession(SessionId, RI_CONDITIONAL_ACCESS_SUPPORT, Tc)
{
dbgprotocol("New Conditional Access Support (session id %d)\n", SessionId);
state = 0;
}
bool cCiConditionalAccessSupport::Process(int Length, const uint8_t *Data)
{
if (state == 0) {
dbgprotocol("%d: ==> Ca Info Enq\n", SessionId());
SendData(AOT_CA_INFO_ENQ);
state = 1;
}
return true;
}
bool cCiConditionalAccessSupport::SendPMT(cCiCaPmt &CaPmt)
{
if (state == 1) {
SendData(AOT_CA_PMT, CaPmt.length, CaPmt.capmt);
return true;
}
return false;
}
// --- cCiDateTime -----------------------------------------------------------
class cCiDateTime : public cCiSession {
private:
int interval;
time_t lastTime;
bool SendDateTime(void);
public:
cCiDateTime(int SessionId, cCiTransportConnection *Tc);
virtual bool Process(int Length = 0, const uint8_t *Data = NULL);
};
cCiDateTime::cCiDateTime(int SessionId, cCiTransportConnection *Tc)
:cCiSession(SessionId, RI_DATE_TIME, Tc)
{
interval = 0;
lastTime = 0;
dbgprotocol("New Date Time (session id %d)\n", SessionId);
}
bool 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) (((d / 10) << 4) + (d % 10))
struct tTime { unsigned short 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 : htons(tm_loc.tm_gmtoff / 60) };
dbgprotocol("%d: ==> Date Time\n", SessionId());
SendData(AOT_DATE_TIME, 7, (uint8_t*)&T);
//XXX return value of all SendData() calls???
return true;
}
return false;
}
bool 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("%d: <== Date Time Enq, interval = %d\n", SessionId(), interval);
lastTime = time(NULL);
return SendDateTime();
}
break;
default: esyslog("ERROR: CI date time: unknown tag %06X", Tag);
return false;
}
}
else if (interval && time(NULL) - lastTime > interval) {
lastTime = time(NULL);
return SendDateTime();
}
return true;
}
// --- 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;
cCiEnquiry *enquiry;
public:
cCiMMI(int SessionId, cCiTransportConnection *Tc);
virtual ~cCiMMI();
virtual bool Process(int Length = 0, const uint8_t *Data = NULL);
cCiMenu *Menu(void);
cCiEnquiry *Enquiry(void);
bool SendMenuAnswer(uint8_t Selection);
bool SendAnswer(const char *Text);
};
cCiMMI::cCiMMI(int SessionId, cCiTransportConnection *Tc)
:cCiSession(SessionId, RI_MMI, Tc)
{
dbgprotocol("New MMI (session id %d)\n", SessionId);
menu = NULL;
enquiry = NULL;
}
cCiMMI::~cCiMMI()
{
delete menu;
delete enquiry;
}
char *cCiMMI::GetText(int &Length, const uint8_t **Data)
///< Gets the text at Data.
///< \return 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("%d: <== Text Last '%s'\n", SessionId(), s);
return s;
}
else
esyslog("CI MMI: unexpected text tag: %06X", Tag);
return NULL;
}
bool cCiMMI::Process(int Length, const uint8_t *Data)
{
if (Data) {
int Tag = GetTag(Length, &Data);
switch (Tag) {
case AOT_DISPLAY_CONTROL: {
dbgprotocol("%d: <== Display Control\n", 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) {
struct tDisplayReply { uint8_t id; uint8_t mode; };
tDisplayReply dr = { id : DRI_MMI_MODE_ACK, mode : MM_HIGH_LEVEL };
dbgprotocol("%d: ==> Display Reply\n", SessionId());
SendData(AOT_DISPLAY_REPLY, 2, (uint8_t *)&dr);
}
break;
default: esyslog("CI MMI: unsupported display control command %02X", *d);
return false;
}
}
}
break;
case AOT_LIST_LAST:
case AOT_MENU_LAST: {
dbgprotocol("%d: <== Menu Last\n", SessionId());
delete menu;
menu = new cCiMenu(this, Tag == AOT_MENU_LAST);
int l = 0;
const uint8_t *d = GetData(Data, l);
if (l > 0) {
// since the specification allows choiceNb to be undefined it is useless, so let's just skip it:
d++;
l--;
if (l > 0) menu->titleText = GetText(l, &d);
if (l > 0) menu->subTitleText = GetText(l, &d);
if (l > 0) menu->bottomText = GetText(l, &d);
while (l > 0) {
char *s = GetText(l, &d);
if (s) {
if (!menu->AddEntry(s))
free(s);
}
else
break;
}
}
}
break;
case AOT_ENQ: {
dbgprotocol("%d: <== Enq\n", SessionId());
delete enquiry;
enquiry = new cCiEnquiry(this);
int l = 0;
const uint8_t *d = GetData(Data, l);
if (l > 0) {
uint8_t blind = *d++;
//XXX GetByte()???
l--;
enquiry->blind = blind & EF_BLIND;
enquiry->expectedLength = *d++;
l--;
// I really wonder why there is no text length field here...
enquiry->text = CopyString(l, d);
}
}
break;
default: esyslog("ERROR: CI MMI: unknown tag %06X", Tag);
return false;
}
}
return true;
}
cCiMenu *cCiMMI::Menu(void)
{
cCiMenu *m = menu;
menu = NULL;
return m;
}
cCiEnquiry *cCiMMI::Enquiry(void)
{
cCiEnquiry *e = enquiry;
enquiry = NULL;
return e;
}
bool cCiMMI::SendMenuAnswer(uint8_t Selection)
{
dbgprotocol("%d: ==> Menu Answ\n", SessionId());
SendData(AOT_MENU_ANSW, 1, &Selection);
//XXX return value of all SendData() calls???
return true;
}
bool cCiMMI::SendAnswer(const char *Text)
{
dbgprotocol("%d: ==> Answ\n", SessionId());
struct tAnswer { uint8_t id; char text[256]; };//XXX
tAnswer answer;
answer.id = Text ? AI_ANSWER : AI_CANCEL;
if (Text)
strncpy(answer.text, Text, sizeof(answer.text));
SendData(AOT_ANSW, Text ? strlen(Text) + 1 : 1, (uint8_t *)&answer);
//XXX return value of all SendData() calls???
return true;
}
// --- cCiMenu ---------------------------------------------------------------
cCiMenu::cCiMenu(cCiMMI *MMI, bool Selectable)
{
mmi = MMI;
selectable = Selectable;
titleText = subTitleText = bottomText = NULL;
numEntries = 0;
}
cCiMenu::~cCiMenu()
{
free(titleText);
free(subTitleText);
free(bottomText);
for (int i = 0; i < numEntries; i++)
free(entries[i]);
}
bool cCiMenu::AddEntry(char *s)
{
if (numEntries < MAX_CIMENU_ENTRIES) {
entries[numEntries++] = s;
return true;
}
return false;
}
bool cCiMenu::Select(int Index)
{
if (mmi && -1 <= Index && Index < numEntries)
return mmi->SendMenuAnswer(Index + 1);
return false;
}
bool cCiMenu::Cancel(void)
{
return Select(-1);
}
// --- cCiEnquiry ------------------------------------------------------------
cCiEnquiry::cCiEnquiry(cCiMMI *MMI)
{
mmi = MMI;
text = NULL;
blind = false;;
expectedLength = 0;;
}
cCiEnquiry::~cCiEnquiry()
{
free(text);
}
bool cCiEnquiry::Reply(const char *s)
{
return mmi ? mmi->SendAnswer(s) : false;
}
bool cCiEnquiry::Cancel(void)
{
return Reply(NULL);
}
// --- cCiCaPmt --------------------------------------------------------------
// 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
cCiCaPmt::cCiCaPmt(int ProgramNumber)
{
length = 0;
capmt[length++] = CPLM_ONLY;
capmt[length++] = (ProgramNumber >> 8) & 0xFF;
capmt[length++] = ProgramNumber & 0xFF;
capmt[length++] = 0x00; //XXX version_number, current_next_indicator - apparently may be 0x00
capmt[length++] = 0x00; //XXX program_info_length H (at program level)
capmt[length++] = 0x00; //XXX program_info_length L
esInfoLengthPos = 0;
}
void cCiCaPmt::AddPid(int Pid)
{
capmt[length++] = 0x00; //XXX stream_type (apparently doesn't matter)
capmt[length++] = (Pid >> 8) & 0xFF;
capmt[length++] = Pid & 0xFF;
esInfoLengthPos = length;
}
void cCiCaPmt::AddCaDescriptor(int Length, uint8_t *Data)
{
if (esInfoLengthPos) {
if (esInfoLengthPos == length) {
length += 2;
capmt[length++] = CPCI_OK_DESCRAMBLING;
}
if (length + Length < int(sizeof(capmt))) {
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");
}
else
esyslog("ERROR: adding CA descriptor without Pid!");
}
// -- cCiHandler -------------------------------------------------------------
cCiHandler::cCiHandler(int Fd, int NumSlots)
{
numSlots = NumSlots;
for (int i = 0; i < MAX_CI_SESSION; i++)
sessions[i] = NULL;
tpl = new cCiTransportLayer(Fd, numSlots);
tc = tpl->NewConnection();
if (!tc)
isyslog("CAM: no CAM detected");
}
cCiHandler::~cCiHandler()
{
for (int i = 0; i < MAX_CI_SESSION; i++)
delete sessions[i];
delete tpl;
}
cCiHandler *cCiHandler::CreateCiHandler(const char *FileName)
{
int fd_ca = open(FileName, O_RDWR);
if (fd_ca >= 0) {
ca_caps_t Caps;
if (ioctl(fd_ca, CA_GET_CAP, &Caps) == 0) {
int NumSlots = Caps.slot_num;
if (NumSlots > 0) {
dsyslog("CAM: found %d CAM slots", NumSlots);
if (Caps.slot_type == CA_CI_LINK) {
cCiHandler *CiHandler = new cCiHandler(fd_ca, NumSlots);
// drive the initial data exchange:
for (int i = 0; i < 20; i++) //XXX make this dynamic???
CiHandler->Process();
return CiHandler;
}
else
esyslog("ERROR: CAM doesn't support link layer interface");
}
esyslog("ERROR: no CAM slots found");
}
else
LOG_ERROR_STR(FileName);
}
return NULL;
}
int cCiHandler::ResourceIdToInt(const uint8_t *Data)
{
return (ntohl(*(int *)Data));
}
bool cCiHandler::Send(uint8_t Tag, int SessionId, int ResourceId, int Status)
{
uint8_t buffer[16];
uint8_t *p = buffer;
*p++ = Tag;
*p++ = 0x00; // will contain length
if (Status >= 0)
*p++ = Status;
if (ResourceId) {
*(int *)p = htonl(ResourceId);
p += 4;
}
*(short *)p = htons(SessionId);
p += 2;
buffer[1] = p - buffer - 2; // length
return tc->SendData(p - buffer, buffer) == OK;
}
cCiSession *cCiHandler::GetSessionBySessionId(int SessionId)
{
for (int i = 0; i < MAX_CI_SESSION; i++) {
if (sessions[i] && sessions[i]->SessionId() == SessionId)
return sessions[i];
}
return NULL;
}
cCiSession *cCiHandler::GetSessionByResourceId(int ResourceId)
{
for (int i = 0; i < MAX_CI_SESSION; i++) {
if (sessions[i] && sessions[i]->ResourceId() == ResourceId)
return sessions[i];
}
return NULL;
}
cCiSession *cCiHandler::CreateSession(int ResourceId)
{
if (!GetSessionByResourceId(ResourceId)) {
for (int i = 0; i < MAX_CI_SESSION; i++) {
if (!sessions[i]) {
switch (ResourceId) {
case RI_RESOURCE_MANAGER: return sessions[i] = new cCiResourceManager(i + 1, tc);
case RI_APPLICATION_INFORMATION: return sessions[i] = new cCiApplicationInformation(i + 1, tc);
case RI_CONDITIONAL_ACCESS_SUPPORT: return sessions[i] = new cCiConditionalAccessSupport(i + 1, tc);
case RI_HOST_CONTROL: break; //XXX
case RI_DATE_TIME: return sessions[i] = new cCiDateTime(i + 1, tc);
case RI_MMI: return sessions[i] = new cCiMMI(i + 1, tc);
}
}
}
}
return NULL;
}
bool cCiHandler::OpenSession(int Length, const uint8_t *Data)
{
if (Length == 6 && *(Data + 1) == 0x04) {
int ResourceId = ResourceIdToInt(Data + 2);
dbgprotocol("OpenSession %08X\n", ResourceId);
switch (ResourceId) {
case RI_RESOURCE_MANAGER:
case RI_APPLICATION_INFORMATION:
case RI_CONDITIONAL_ACCESS_SUPPORT:
case RI_HOST_CONTROL:
case RI_DATE_TIME:
case RI_MMI:
{
cCiSession *Session = CreateSession(ResourceId);
if (Session) {
Send(ST_OPEN_SESSION_RESPONSE, Session->SessionId(), Session->ResourceId(), SS_OK);
return true;
}
esyslog("ERROR: can't create session for resource identifier: %08X", ResourceId);
}
default: esyslog("ERROR: unknown resource identifier: %08X", ResourceId);
}
}
return false;
}
bool cCiHandler::CloseSession(int SessionId)
{
dbgprotocol("CloseSession %08X\n", SessionId);
cCiSession *Session = GetSessionBySessionId(SessionId);
if (Session && sessions[SessionId - 1] == Session) {
delete Session;
sessions[SessionId - 1] = NULL;
Send(ST_CLOSE_SESSION_RESPONSE, SessionId, 0, SS_OK);
return true;
}
else {
esyslog("ERROR: unknown session id: %d", SessionId);
Send(ST_CLOSE_SESSION_RESPONSE, SessionId, 0, SS_NOT_ALLOCATED);
}
return false;
}
bool cCiHandler::Process(void)
{
if (tc) {
cMutexLock MutexLock(&mutex);
if (tpl->Process() == OK) {
int Length;
const uint8_t *Data = tc->Data(Length);
if (Data && Length > 1) {
switch (*Data) {
case ST_SESSION_NUMBER: if (Length > 4) {
int SessionId = ntohs(*(short *)&Data[2]);
cCiSession *Session = GetSessionBySessionId(SessionId);
if (Session)
return Session->Process(Length - 4, Data + 4);
else {
esyslog("ERROR: unknown session id: %d", SessionId);
return false;
}
}
break;
case ST_OPEN_SESSION_REQUEST: return OpenSession(Length, Data);
case ST_CLOSE_SESSION_REQUEST: if (Length == 4)
return CloseSession(ntohs(*(short *)&Data[2]));
break;
case ST_CREATE_SESSION_RESPONSE: //XXX fall through to default
case ST_CLOSE_SESSION_RESPONSE: //XXX fall through to default
default: esyslog("ERROR: unknown session tag: %02X", *Data);
return false;
}
return true;
}
for (int i = 0; i < MAX_CI_SESSION; i++) {
if (sessions[i])
sessions[i]->Process();//XXX retval???
}
}
}
return false;
}
bool cCiHandler::EnterMenu(void)
{
cMutexLock MutexLock(&mutex);
//XXX slots???
cCiApplicationInformation *api = (cCiApplicationInformation *)GetSessionByResourceId(RI_APPLICATION_INFORMATION);
return api ? api->EnterMenu() : false;
}
cCiMenu *cCiHandler::GetMenu(void)
{
cMutexLock MutexLock(&mutex);
//XXX slots???
cCiMMI *mmi = (cCiMMI *)GetSessionByResourceId(RI_MMI);
return mmi ? mmi->Menu() : NULL;
}
cCiEnquiry *cCiHandler::GetEnquiry(void)
{
cMutexLock MutexLock(&mutex);
//XXX slots???
cCiMMI *mmi = (cCiMMI *)GetSessionByResourceId(RI_MMI);
return mmi ? mmi->Enquiry() : NULL;
}
bool cCiHandler::SetCaPmt(cCiCaPmt &CaPmt)
{
cMutexLock MutexLock(&mutex);
//XXX slots???
cCiConditionalAccessSupport *cas = (cCiConditionalAccessSupport *)GetSessionByResourceId(RI_CONDITIONAL_ACCESS_SUPPORT);
return cas ? cas->SendPMT(CaPmt) : false;
}
bool cCiHandler::Reset(void)
{
cMutexLock MutexLock(&mutex);
//XXX slots???
return false;//XXX not yet implemented
}