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parse ca_private_data for a few more caids

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sb1066 2010-01-04 20:49:40 +00:00
parent 2d7bb187e6
commit 19a45e9148
1 changed files with 69 additions and 46 deletions
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115
src/psi.c
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@ -204,52 +204,13 @@ psi_build_pat(th_transport_t *t, uint8_t *buf, int maxlen, int pmtpid)
/**
* Parser for CA descriptor, viaccess
* Add a CA descriptor
*/
static int
psi_desc_ca_viaccess(th_transport_t *t, th_stream_t *st,
const uint8_t *ptr, int len)
psi_desc_add_ca(th_transport_t *t, uint16_t caid, uint32_t provid, uint16_t pid)
{
uint8_t tag, tlen;
uint32_t id;
while(len > 2) {
tag = ptr[0];
tlen = ptr[1];
ptr += 2;
len -= 2;
if(len < tlen)
return 0;
switch(tag) {
case 0x14:
id = (ptr[0] << 16) | (ptr[1] << 8) | (ptr[2] & 0xf0);
if(id != st->st_providerid) {
st->st_providerid = id;
return PMT_UPDATE_CA_PROVIDER_CHANGE;
}
}
len -= tlen;
ptr += tlen;
}
return 0;
}
/**
* Parser for CA descriptor
*/
static int
psi_desc_ca(th_transport_t *t, const uint8_t *ptr, int len)
{
uint16_t pid = (ptr[2] & 0x1f) << 8 | ptr[3];
th_stream_t *st;
int r = 0;
uint16_t caid = (ptr[0] << 8) | ptr[1];
if((st = transport_stream_find(t, pid)) == NULL) {
st = transport_stream_create(t, pid, SCT_CA);
@ -263,15 +224,77 @@ psi_desc_ca(th_transport_t *t, const uint8_t *ptr, int len)
r |= PMT_UPDATE_NEW_CAID;
}
len -= 4;
ptr += 4;
if(st->st_providerid != provid) {
st->st_providerid = provid;
r |= PMT_UPDATE_CA_PROVIDER_CHANGE;
}
switch(caid >> 8) {
case 5:
r |= psi_desc_ca_viaccess(t, st, ptr, len);
return r;
}
/**
* Parser for CA descriptors
*/
static int
psi_desc_ca(th_transport_t *t, const uint8_t *buffer, int size)
{
int r = 0;
int i = 0;
uint32_t provid = 0;
uint16_t caid = (buffer[0] << 8) | buffer[1];
uint16_t pid = ((buffer[2]&0x1F) << 8) | buffer[3];
switch (caid & 0xFF00) {
case 0x0100: // SECA/Mediaguard
provid = (buffer[4] << 8) | buffer[5];
//Add extra providers, if any
for (i = 17; i < size; i += 15){
uint16_t _pid = ((buffer[i]&0x1F) << 8) | buffer[i + 1];
uint16_t _provid = (buffer[i + 2] << 8) | buffer[i + 3];
r |= psi_desc_add_ca(t, caid, _provid, _pid);
}
break;
case 0x0500:// Viaccess
for (i = 4; i < size;) {
unsigned char nano = buffer[i++];
unsigned char nanolen = buffer[i++];
if (nano == 0x14) {
provid = (buffer[i] << 16) | (buffer[i + 1] << 8) | (buffer[i + 2] & 0xf0);
break;
}
i += nanolen;
}
case 0x0D00:// Cryptoworks
for (i = 8; i < size;) {
unsigned char nano = buffer[i++];
unsigned char nanolen = buffer[i++];
if (nano == 0x83) {
provid = buffer[i] & 0xFC;
break;
}
i += nanolen;
}
break;
case 0x0600:// Irdeto
case 0x1700:// Betacrypt
provid = buffer[6] << 8 | buffer[7];
break;
case 0x1800:// Nagravision
provid = buffer[5] << 8 | buffer[6];
break;
default:
provid = 0;
break;
}
r |= psi_desc_add_ca(t, caid, provid, pid);
return r;
}