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/* DVB CI Transport Connection */
#include <lib/dvb_ci/dvbci_session.h>
eDVBCISession::eDVBCISession(eDVBCISlot *cislot)
{
slot = cislot;
}
int eDVBCISession::buildLengthField(unsigned char *pkt, int len)
{
if (len < 127)
{
*pkt++=len;
return 1;
} else if (len < 256)
{
*pkt++=0x81;
*pkt++=len;
return 2;
} else if (len < 65535)
{
*pkt++=0x82;
*pkt++=len>>8;
*pkt++=len;
return 3;
} else
{
printf("too big length\n");
exit(0);
}
}
int eDVBCISession::parseLengthField(const unsigned char *pkt, int &len)
{
len=0;
if (!(*pkt&0x80))
{
len = *pkt;
return 1;
}
for (int i=0; i<(pkt[0]&0x7F); ++i)
{
len <<= 8;
len |= pkt[i + 1];
}
return (pkt[0] & 0x7F) + 1;
}
void eDVBCISession::sendSPDU(eDVBCISlot *slot, unsigned char tag, const void *data, int len, unsigned short session_nb, const void *apdu,int alen)
{
unsigned char pkt[4096];
unsigned char *ptr=pkt;
*ptr++=tag;
ptr+=buildLengthField(ptr, len+2);
if (data)
memcpy(ptr, data, len);
ptr+=len;
*ptr++=session_nb>>8;
*ptr++=session_nb;
if (apdu)
memcpy(ptr, apdu, alen);
ptr+=alen;
slot->write(pkt, ptr - pkt);
}
void eDVBCISession::sendOpenSessionResponse(eDVBCISlot *slot, unsigned char session_status, const unsigned char *resource_identifier, unsigned short session_nb)
{
char pkt[6];
pkt[0]=session_status;
printf("sendOpenSessionResponse\n");
memcpy(pkt + 1, resource_identifier, 4);
sendSPDU(slot, 0x92, pkt, 5, session_nb);
}
eDVBCISession *eDVBCISession::createSession(eDVBCISlot *slot, const unsigned char *resource_identifier, unsigned char &status)
{
eDVBCISession *session;
unsigned long tag;
unsigned short session_nb;
for (session_nb=1; session_nb < SLMS; ++session_nb)
if (!sessions[session_nb-1])
break;
if (session_nb == SLMS)
{
status=0xF3;
return 0;
}
tag = resource_identifier[0] << 24;
tag|= resource_identifier[1] << 16;
tag|= resource_identifier[2] << 8;
tag|= resource_identifier[3];
switch (tag)
{
case 0x00010041:
// session=new eDVBCIResourceManagerSession;
printf("RESOURCE MANAGER\n");
break;
case 0x00020041:
// session=eDVBCIModule::getInstance()->application_manager = new eDVBCIApplicationManagerSession;
printf("APPLICATION MANAGER\n");
break;
case 0x00030041:
// session=eDVBCIModule::getInstance()->ca_manager=new eDVBCICAManagerSession;
printf("CA MANAGER\n");
break;
case 0x00240041:
// session=new eDVBCIDateTimeSession;
printf("DATE-TIME\n");
break;
case 0x00400041:
// session=new eDVBCIMMISession;
printf("MMI\n");
break;
case 0x00100041:
// session=new eDVBCIAuthSession;
printf("AuthSession\n");
break;
case 0x00200041:
default:
printf("unknown resource type %02x %02x %02x %02x\n", resource_identifier[0], resource_identifier[1], resource_identifier[2],resource_identifier[3]);
session=0;
status=0xF0;
}
if (!session)
{
printf("unknown session.. expect crash\n");
return 0;
}
printf("new session_nb: %d\n", session_nb);
session->session_nb = session_nb;
if (session)
{
printf("session ok, status %02x\n", session->status);
status = session->getStatus();
if (status)
{
delete session;
session = 0;
}
sessions[session_nb - 1] = session;
session->slot = slot;
}
session->state = stateInCreation;
return session;
}
void eDVBCISession::receiveData(const unsigned char *ptr, size_t len)
{
const unsigned char *pkt = (const unsigned char*)ptr;
unsigned char tag = *pkt++;
int llen, hlen;
llen = parseLengthField(pkt, hlen);
pkt += llen;
eDVBCISession *session = NULL;
if(tag == 0x91)
{
unsigned char status;
session = createSession(slot, pkt, status);
sendOpenSessionResponse(slot, status, pkt, session?session->session_nb:0);
if (session)
{
session->state=stateStarted;
session->action=1;
}
}
}
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