void LogSequence2::save(std::ostream & out)
{
CRC8 crch;
CRC32 crcd;
unsigned char data[9];
unsigned int len;
// Write type
uint8_t type = TYPE_SEQLOG;
crch.writeData(out, &type, sizeof(uint8_t));
// Write numbits
crch.writeData(out, &numbits, sizeof(numbits));
// Write numentries
len=csd::VByte::encode(data, numentries);
crch.writeData(out, data, len);
// Write Header CRC
crch.writeCRC(out);
// Write data
size_t numbytes = numBytesFor(numbits, numentries);
crcd.writeData(out, (unsigned char*)&array[0], numbytes);
// Write Data CRC
crcd.writeCRC(out);
}
void CSD_PFC::save(ostream &out)
{
CRC8 crch;
CRC32 crcd;
unsigned char buf[27]; // 9 bytes per VByte (max) * 3 values.
// Save type
crch.writeData(out, (unsigned char *)&type, sizeof(type));
// Save sizes
uint8_t pos = 0;
pos += VByte::encode(&buf[pos], numstrings);
pos += VByte::encode(&buf[pos], bytes);
pos += VByte::encode(&buf[pos], blocksize);
crch.writeData(out, buf, pos);
crch.writeCRC(out);
// Write block pointers
if(!blocks) {
hdt::LogSequence2 log;
log.save(out);
} else {
blocks->save(out);
}
// Write packed data
if(text) {
crcd.writeData(out, text, bytes);
} else {
assert(numstrings==0);
assert(bytes==0);
}
crcd.writeCRC(out);
}
int H223AL2Sender::SendPDU(BYTE *buffer,int len)
{
//Crc
CRC8 crc;
//Build SDU
H223MuxSDU *sdu = new H223MuxSDU();
//If we have sn
if (useSN)
//Append
sdu->Push(sn++);
//Set buffer
sdu->Push(buffer,len);
//Calc crc
crc.Add(sdu->GetPointer(),sdu->Length());
//Append crc
sdu->Push(crc.Calc());
//Dump media
logger->DumpMediaOutput(buffer,len);
//Push sdu into jitterBuffer
jitBuf.Push( sdu );
//exit
return true;
}
void LogSequence2::load(std::istream & input)
{
CRC8 crch;
CRC32 crcd;
unsigned char buf[9];
// Read type
uint8_t type;
crch.readData(input, (unsigned char*)&type, sizeof(type));
if(type!=TYPE_SEQLOG) {
//throw "Trying to read a LOGArray but data is not LogArray";
}
// Read numbits
crch.readData(input, (unsigned char*)&numbits, sizeof(numbits));
// Read numentries
uint64_t numentries64 = csd::VByte::decode(input);
unsigned int pos = csd::VByte::encode(buf, numentries64);
crch.update(buf, pos);
// Validate Checksum Header
crc8_t filecrch = crc8_read(input);
if(crch.getValue()!=filecrch) {
throw "Checksum error while reading LogSequence2 header.";
}
// Update local variables and validate
maxval = maxVal(numbits);
numentries = (size_t) numentries64;
if(numbits>sizeof(size_t)*8 || numentries64>std::numeric_limits<size_t>::max()) {
throw "This data structure is too big for this machine";
}
// Calculate data size, reserve buffer.
size_t numbytes = numBytesFor(numbits, numentries);
data.resize(numElementsFor(numbits, numentries));
arraysize = data.size();
array = &data[0];
// Read data
crcd.readData(input, (unsigned char*)&array[0], numbytes);
// Validate checksum data
crc32_t filecrcd = crc32_read(input);
if(crcd.getValue()!=filecrcd) {
throw "Checksum error while reading LogSequence2 Data";
}
IsMapped = false;
}
size_t LogSequence2::load(const unsigned char *ptr, const unsigned char *ptrMax, ProgressListener *listener) {
size_t count = 0;
// Read type
CHECKPTR(&ptr[count], ptrMax, 1);
if(ptr[count]!=TYPE_SEQLOG) {
throw "Trying to read a LOGArray but data is not LogArray";
}
count++;
// Read numbits
CHECKPTR(&ptr[count], ptrMax, 1);
numbits = ptr[count++];
// Read numentries
uint64_t numentries64;
count += csd::VByte::decode(&ptr[count], ptrMax, &numentries64);
// Validate Checksum Header
CRC8 crch;
crch.update(&ptr[0], count);
CHECKPTR(&ptr[count], ptrMax, 1);
if(crch.getValue()!=ptr[count++])
throw "Checksum error while reading LogSequence2 header.";
// Update local variables and validate
maxval = maxVal(numbits);
numentries = (size_t) numentries64;
if(numbits>sizeof(size_t)*8 || numentries64>std::numeric_limits<size_t>::max()) {
throw "This data structure is too big for this machine";
}
// Setup array of data
arraysize = numBytesFor(numbits, numentries);
array = (size_t *) &ptr[count];
count+=arraysize;
IsMapped = true;
if(&ptr[count]>=ptrMax)
throw "LogSequence2 tries to read beyond the end of the file";
CHECKPTR(&ptr[count], ptrMax, 4);
count+=4; // CRC of data
return count;
}
void H223AL2Receiver::SendClosingFlag()
{
//Check empty
if (sdu.Length() == 0)
return;
//Crc
CRC8 crc;
//Data
BYTE *data;
int dataLen;
//Check minimum size
if (sdu.Length()<2+useSN)
goto clean;
//Get data
data = sdu.GetPointer();
dataLen = sdu.Length();
//Set data
crc.Add(data,dataLen-1);
//Dump media
logger->DumpMediaInput(data+useSN,dataLen-useSN-1);
//Calc
if (data[dataLen-1]!=crc.Calc())
goto clean;
//Send to listener
sduListener->OnSDU(data+useSN,dataLen-useSN-1);
//Clean SDU and exit
clean:
sdu.Clean();
}
size_t CSD_PFC::load(unsigned char *ptr, unsigned char *ptrMax) {
size_t count=0;
// Type
if(ptr[count++] != PFC)
throw std::runtime_error("Trying to read a CSD_PFC but type does not match");
count += VByte::decode(&ptr[count], ptrMax, &numstrings);
count += VByte::decode(&ptr[count], ptrMax, &bytes);
count += VByte::decode(&ptr[count], ptrMax, &blocksize);
// CRC
CRC8 crch;
crch.update(&ptr[0], count);
if(crch.getValue()!=ptr[count++])
throw std::runtime_error("CRC Error while reading CSD_PFC Header.");
// Blocks
if(blocks) delete blocks;
blocks = new hdt::LogSequence2();
count += blocks->load(&ptr[count], ptrMax);
nblocks = blocks->getNumberOfElements()-1;
// Read packed data
if(!isMapped) free(text);
text = &ptr[count];
count+=bytes;
// Ignore data CRC.
count+=4;
isMapped=true;
return count;
}
CSD* CSD_PFC::load(istream & fp)
{
CRC8 crch;
CRC32 crcd;
unsigned char buf[27]; // 9 bytes per VByte (max) * 3 values.
CSD_PFC *dicc = new CSD_PFC();
// Load variables
dicc->type = PFC; // Type already read by CSD
dicc->numstrings = (uint32_t) VByte::decode(fp);
dicc->bytes = VByte::decode(fp);
dicc->blocksize = (uint32_t) VByte::decode(fp);
// Calculate variables CRC
crch.update(&dicc->type, sizeof(dicc->type));
uint8_t pos = 0;
pos += VByte::encode(&buf[pos], dicc->numstrings);
pos += VByte::encode(&buf[pos], dicc->bytes);
pos += VByte::encode(&buf[pos], dicc->blocksize);
crch.update(buf, pos);
crc8_t filecrc = crc8_read(fp);
if(crch.getValue()!=filecrc) {
throw std::runtime_error("Checksum error while reading Plain Front Coding Header.");
}
// Load blocks
dicc->blocks = new hdt::LogSequence2();
dicc->blocks->load(fp);
dicc->nblocks = dicc->blocks->getNumberOfElements()-1;
// Load strings
if(dicc->bytes && dicc->numstrings) {
dicc->text = (unsigned char *)malloc(dicc->bytes);
const unsigned int blocksize = 8192;
uint64_t counter=0;
unsigned char *ptr = (unsigned char *)dicc->text;
while(counter<dicc->bytes && fp.good()) {
crcd.readData(fp, ptr, dicc->bytes-counter > blocksize ? blocksize : dicc->bytes-counter);
ptr += fp.gcount();
counter += fp.gcount();
}
if(counter!=dicc->bytes) {
throw std::runtime_error("Could not read all the data section of the Plain Front Coding.");
}
} else {
// Make sure that all is zero.
dicc->text = NULL;
dicc->numstrings = 0;
dicc->bytes = 0;
dicc->nblocks = 0;
delete dicc->blocks;
}
crc32_t filecrcd = crc32_read(fp);
if(filecrcd!=crcd.getValue()) {
throw std::runtime_error("Checksum error in the data section of the Plain Front Coding.");
}
return dicc;
}
