// $Id$
//
-// Copyright (C) 2006
-// Fraunhofer Institut fuer offene Kommunikationssysteme (FOKUS)
-// Kompetenzzentrum fuer Satelitenkommunikation (SatCom)
-// Stefan Bund <stefan.bund@fokus.fraunhofer.de>
+// Copyright (C) 2007
+// Fraunhofer Institute for Open Communication Systems (FOKUS)
+// Competence Center NETwork research (NET), St. Augustin, GERMANY
+// Thorsten Horstmann <tho@berlios.de>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// Definition of non-inline non-template functions
-#include <string>
-#include <iostream>
-#include <iomanip>
-#include <algorithm>
-#include <sys/ioctl.h>
-#include <linux/sockios.h>
-#include <linux/dvb/dmx.h>
-
-#include "Scheduler/Scheduler.hh"
-#include "Packets/DefaultBundle/EthernetPacket.hh"
-#include "Packets/MPEGDVBBundle/TransportPacket.hh"
-#include "Packets/MPEGDVBBundle/SNDUPacket.hh"
-#include "Utils/membind.hh"
-#include "Socket/Protocols/DVB/DVBDemuxHandles.hh"
-#include "Packets/ParseInt.hh"
-#include "Packets/Packet.hh"
-#include "Packets/PacketData.hh"
-#include "Packets/ParseInt.hh"
-
#include "ULEdec.hh"
+#include <cassert>
+#include <linux/dvb/dmx.h>
+#include <boost/format.hpp>
+#include <senf/Packets.hh>
+#include <senf/Utils/hexdump.hh>
+#include <senf/Utils/membind.hh>
+
#define PID 271
-#define TS_SYNC 0x47
+#define TRANSPORT_PACKET_SIZE 188
+// max. payload_pointer = ts packet payload size ( = ts packet size - ts header - payload_pointer)
+// - 2 bytes min. sndu header
+#define MAX_PAYLOAD_POINTER ( TRANSPORT_PACKET_SIZE - 4 - 1 - 2 )
#define prefix_
-///////////////////////////////cc.p////////////////////////////////////////
-
-template <class Iterator>
-void ULEdec::hexdump(Iterator i, Iterator const & i_end, std::ostream& stream)
-{
- unsigned offset (0);
- std::string ascii;
- for (; i != i_end; ++i, ++offset) {
- switch (offset % BLOCK_SIZE) {
- case 0:
- if (!ascii.empty()) {
- stream << " " << ascii << "\n";
- ascii = "";
- }
- stream << " "
- << std::hex << std::setw(4) << std::setfill('0')
- << offset << ' ';
- break;
- case BLOCK_SIZE/2:
- stream << " ";
- ascii += ' ';
- break;
- }
- stream << ' ' << std::hex << std::setw(2) << std::setfill('0')
- << unsigned(*i);
- ascii += (*i >= ' ' && *i < 126) ? *i : '.';
- }
- if (!ascii.empty()) {
- for (; (offset % BLOCK_SIZE) != 0; ++offset) {
- if ((offset % BLOCK_SIZE) == BLOCK_SIZE/2)
- stream << " ";
- stream << " ";
- }
- stream << " " << ascii << "\n";
- }
- stream << std::dec;
-}
+//-/////////////////////////////////////////////////////////////////////////////////////////////////
-ULEdec::ULEdec()
+ULEdec::ULEdec(unsigned short adapter, unsigned short device)
+ : demuxHandle( adapter, device ), dvrHandle( adapter, device )
{
struct dmx_pes_filter_params pes_filter;
memset(&pes_filter, 0, sizeof (struct dmx_pes_filter_params));
pes_filter.pes_type = DMX_PES_OTHER;
pes_filter.flags = DMX_IMMEDIATE_START;
demuxHandle.protocol().setPESFilter( &pes_filter );
-
+
senf::Scheduler::instance().add(
dvrHandle, senf::membind(&ULEdec::handleEvent, this));
-
+
this->receiver_state = Idle;
this->priv_sndu_type_1 = false;
}
-void ULEdec::handleEvent(senf::FileHandle, senf::Scheduler::EventId event)
+void ULEdec::handleEvent(senf::Scheduler::EventId event)
{
senf::TransportPacket ts_packet (
- senf::TransportPacket::create(188, senf::TransportPacket::noinit));
+ senf::TransportPacket::create(188, senf::noinit));
dvrHandle.read( ts_packet.data() );
-
+
// Check TS error conditions: sync_byte, transport_error_indicator, scrambling_control.
- if ( (ts_packet->sync_byte() != TS_SYNC) ||
- (ts_packet->transport_error_indicator() == true) ||
- (ts_packet->transport_scrmbl_ctrl() != 0))
+ if ( (ts_packet->sync_byte() != senf::TransportPacketType::SYNC_BYTE) ||
+ (ts_packet->transport_error_indicator() == true) ||
+ (ts_packet->transport_scrmbl_ctrl() != 0))
{
std::cerr << "invalid ts packet\n";
// drop partly decoded SNDU, reset state, resync on PUSI.
return;
}
-
+
handleTSPacket(ts_packet);
}
-
+
void ULEdec::handleTSPacket(senf::TransportPacket ts_packet)
{
senf::PacketData & payloadData (ts_packet.next().data());
- iterator payload_start = payloadData.begin();
+ iterator payload_iter = payloadData.begin();
iterator payload_end = payloadData.end();
-
- hexdump(payload_start, payload_end, std::cout);
-
+
+ std::cout << "New TS Packet:\n"
+ << "----------------------------------------------------------------------------\n";
+ senf::hexdump(payload_iter, payload_end, std::cout);
+ std::cout << "----------------------------------------------------------------------------\n";
+
// Synchronize continuity counter
this->priv_tscc = ts_packet->continuity_counter();
-
- if (ts_packet->pusi() == 0) {
+
+ switch (ts_packet->pusi()) {
+ case 0: {
switch (this->receiver_state) {
case Idle:
return;
case Reassembly:
- readContSNDUPacket( payload_start, payload_end );
+ payload_iter = readContSNDUPacket( payload_iter, payload_end );
+ if (isSDNUPacketComplete()) {
+ this->receiver_state = Idle;
+ try {
+ handleSNDUPacket();
+ } catch (ULEdecException const & ex) {
+ std::cerr << ex.what() << "\n";
+ return;
+ }
+ switch (std::distance( payload_iter, payload_end ))
+ case 0:
+ case 1:
+ return;
+ default:
+ if ( (*payload_iter++ << 8 | *payload_iter++) != ULE_END_INDICATOR )
+ std::cerr << "delimiting error\n";
+ } else {
+ assert( std::distance( payload_iter, payload_end ) == 0 );
+ }
}
- } else {
+ break;
+ }
+ case 1: {
// a PUSI value of 1 indicates the presence of a Payload Pointer.
- unsigned char payload_pointer = *payload_start++;
- if (payload_pointer > 181) {
- std::cerr << "invalid payload_pointer\n";
+ unsigned char payload_pointer = *payload_iter++;
+ if (payload_pointer > MAX_PAYLOAD_POINTER) {
+ std::cerr << str( boost::format(
+ "invalid payload_pointer (%d)\n") % unsigned(payload_pointer) ) ;
+ this->receiver_state = Idle;
return;
}
switch (this->receiver_state) {
case Idle:
- payload_start += payload_pointer;
- readNewSNDUPacket( payload_start, payload_end );
- this->snduPacket.dump(std::cout);
+ std::advance(payload_iter, payload_pointer);
break;
case Reassembly:
// Reassembly Payload Pointer Checking
- unsigned char sdnu_bytes_left = std::distance(
- this->snduPacketData_iter, this->snduPacket.data().end() );
- if (sdnu_bytes_left != payload_pointer) {
+ if (snduPacketBytesLeft() != payload_pointer) {
// delimiting error
- std::cerr << "delimiting error\n";
- payload_start += payload_pointer;
+ std::cerr << str( boost::format(
+ "delimiting error: bytes left in SNDU packet != payload_pointer ("
+ "(%d != %d)\n") % snduPacketBytesLeft() % payload_pointer );
+ std::advance(payload_iter, payload_pointer);
} else {
- readContSNDUPacket( payload_start, payload_end );
- BOOST_ASSERT( this->snduPacketData_iter == this->snduPacket.data().end() );
+ payload_iter = readContSNDUPacket( payload_iter, payload_end );
+ assert( isSDNUPacketComplete() );
+ try {
+ handleSNDUPacket();
+ } catch (ULEdecException const & ex) {
+ std::cerr << ex.what() << "\n";
+ this->receiver_state = Idle;
+ return;
+ }
}
- readNewSNDUPacket( payload_start, payload_end );
- }
+ }
+ this->receiver_state = Idle;
+ try {
+ do {
+ payload_iter = readNewSNDUPacket( payload_iter, payload_end );
+ if (! isSDNUPacketComplete()) {
+ assert( std::distance( payload_iter, payload_end ) == 0 );
+ this->receiver_state = Reassembly;
+ break;
+ }
+ handleSNDUPacket();
+ } while (std::distance(payload_iter, payload_end) < 2 );
+ }
+ catch (ULEdecException const & ex) {
+ std::cerr << ex.what() << "\n";
+ return;
+ }
}
+ } // end pusi-switch
}
-ULEdec::iterator ULEdec::readContSNDUPacket(iterator i_start, iterator i_end)
+ULEdec::iterator ULEdec::readContSNDUPacket(iterator i, iterator const i_end)
{
if (priv_sndu_type_1) {
- this->snduPacket->type() |= *i_start++;
+ this->snduPacket->type() |= *i++;
}
- i_start = readRawSNDUPacketData(i_start, i_end);
-
- return i_start;
+ return readRawSNDUPacketData(i, i_end);
}
-ULEdec::iterator ULEdec::readNewSNDUPacket(iterator i_start, iterator i_end)
-{
+ULEdec::iterator ULEdec::readNewSNDUPacket(iterator i, iterator const i_end)
+{
bool dbit = false;
- senf::Packet::size_type sndu_length;
- sndu_length = *i_start++ << 8 | *i_start++;
+ senf::Packet::size_type sndu_length = *i++ << 8 | *i++;
if (sndu_length & 0x8000) {
sndu_length &= 0x7FFF;
dbit = true;
}
+ if (sndu_length < 5 || sndu_length == 0xffff) {
+ throw ULEdecException( str( boost::format(
+ "SNDU length error. length=%d") % sndu_length) );
+ }
this->snduPacket = senf::SNDUPacket::create(sndu_length+4);
- this->snduPacket->d_bit() = dbit;
+
+ if (dbit)
+ this->snduPacket->withoutDestination();
+ // else not needed since default on newly created packet is withDestination()
+
this->snduPacket->length() = sndu_length;
- this->snduPacketData_iter = this->snduPacket.data().begin() + 2;
+ this->snduPacketData_iter = boost::next(this->snduPacket.data().begin(), 2);
this->priv_sndu_type_1 = false;
-
- switch (std::distance(i_start, i_end)) {
+
+ switch (std::distance(i, i_end)) {
case 1:
this->priv_sndu_type_1 = true;
- this->snduPacket->type() = *i_start++;
+ this->snduPacket->type() = *i++ << 8;
this->snduPacketData_iter++;
case 0:
break;
-
- default:
- this->snduPacket->type() = *i_start++ | *i_start++;
- this->snduPacketData_iter += 2;
- i_start = readRawSNDUPacketData(i_start, i_end);
+
+ default:
+ this->snduPacket->type() = *i++ << 8 | *i++;
+ std::advance(this->snduPacketData_iter, 2);
+ i = readRawSNDUPacketData(i, i_end);
}
-
- return i_start;
+
+ return i;
}
-ULEdec::iterator ULEdec::readRawSNDUPacketData(iterator i_start, iterator i_end)
+ULEdec::iterator ULEdec::readRawSNDUPacketData(iterator i, iterator i_end)
{
unsigned char how_much = std::min(
- std::distance( this->snduPacketData_iter, this->snduPacket.data().end() ),
- std::distance( i_start, i_end ) );
- copy_n(i_start, how_much, this->snduPacketData_iter);
- i_start += how_much;
- this->snduPacketData_iter += how_much;
- return i_start;
+ snduPacketBytesLeft(), std::distance(i, i_end) );
+ copy_n(i, how_much, this->snduPacketData_iter);
+ std::advance(i, how_much);
+ std::advance(this->snduPacketData_iter, how_much);
+ return i;
+}
+
+
+void ULEdec::handleSNDUPacket()
+{
+ this->snduPacket.dump(std::cout);
+ std::cout << "----------------------------------------------------------------------------\n\n";
+ if (this->snduPacket->crc() != this->snduPacket->calcCrc()) {
+ throw ULEdecException( str( boost::format(
+ "CRC Error. received crc:%d calculated crc:%d")
+ % this->snduPacket->crc() % this->snduPacket->calcCrc() ) );
+ }
+// senf::Packet nextPacket = this->snduPacket.next();
+// senf::hexdump(
+// nextPacket.data().begin(),
+// nextPacket.data().end(),
+// std::cout);
+
+}
+
+
+inline bool ULEdec::isSDNUPacketComplete()
+{
+ return this->snduPacketData_iter == this->snduPacket.data().end();
+}
+
+inline ULEdec::iterator::difference_type ULEdec::snduPacketBytesLeft()
+{
+ return std::distance( this->snduPacketData_iter, this->snduPacket.data().end() );
}
}
-///////////////////////////////cc.e////////////////////////////////////////
+//-/////////////////////////////////////////////////////////////////////////////////////////////////
#undef prefix_
\f
// c-file-style: "senf"
// indent-tabs-mode: nil
// ispell-local-dictionary: "american"
-// compile-command: "scons -u test"
+// compile-command: "scons -U"
// comment-column: 40
// End:
projects / senf.git / blobdiff