1 #define TRACE_NAME "UDPReceiver"
2 #include "artdaq/DAQdata/Globals.hh"
4 #include "artdaq-demo/Generators/UDPReceiver.hh"
6 #include "canvas/Utilities/Exception.h"
8 #include "artdaq/Generators/GeneratorMacros.hh"
9 #include "cetlib_except/exception.h"
10 #include "fhiclcpp/ParameterSet.h"
11 #include "artdaq-core/Utilities/SimpleLookupPolicy.hh"
12 #include "messagefacility/MessageLogger/MessageLogger.h"
13 #include "artdaq-core-demo/Overlays/UDPFragmentWriter.hh"
22 : CommandableFragmentGenerator(ps)
23 , dataport_(ps.get<int>(
"port", 6343))
24 , ip_(ps.get<std::string>(
"ip",
"127.0.0.1"))
25 , expectedPacketNumber_(0)
26 , sendCommands_(ps.get<bool>(
"send_CAPTAN_commands", false))
27 , rawOutput_(ps.get<bool>(
"raw_output_enabled", false))
28 , rawPath_(ps.get<std::string>(
"raw_output_path",
"/tmp"))
30 datasocket_ = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
33 throw art::Exception(art::errors::Configuration) <<
"UDPReceiver: Error creating socket!" << std::endl;
37 struct sockaddr_in si_me_data;
38 si_me_data.sin_family = AF_INET;
39 si_me_data.sin_port = htons(dataport_);
40 si_me_data.sin_addr.s_addr = htonl(INADDR_ANY);
41 if (bind(datasocket_, (
struct sockaddr *)&si_me_data,
sizeof(si_me_data)) == -1)
43 throw art::Exception(art::errors::Configuration) <<
44 "UDPReceiver: Cannot bind data socket to port " << dataport_ << std::endl;
48 si_data_.sin_family = AF_INET;
49 si_data_.sin_port = htons(dataport_);
50 if (inet_aton(ip_.c_str(), &si_data_.sin_addr) == 0)
52 throw art::Exception(art::errors::Configuration) <<
53 "UDPReceiver: Could not translate provided IP Address: " << ip_ <<
"\n";
59 bool demo::UDPReceiver::getNext_(artdaq::FragmentPtrs& frags)
66 demo::UDPFragment::Metadata metadata;
67 metadata.port = dataport_;
68 metadata.address = si_data_.sin_addr.s_addr;
88 std::size_t initial_payload_size = 0;
90 frags.emplace_back(artdaq::Fragment::FragmentBytes(initial_payload_size,
91 ev_counter(), fragment_id(),
92 artdaq::Fragment::FirstUserFragmentType, metadata));
94 demo::UDPFragmentWriter thisFrag(*frags.back());
96 bool haveData =
false;
97 int16_t burst_end = -1;
98 uint8_t droppedPackets = 0;
105 struct pollfd ufds[1];
106 ufds[0].fd = datasocket_;
107 ufds[0].events = POLLIN | POLLPRI;
109 int rv = poll(ufds, 1, 1000);
113 if (ufds[0].revents == POLLIN || ufds[0].revents == POLLPRI)
115 uint8_t peekBuffer[2];
116 recvfrom(datasocket_, peekBuffer,
sizeof(peekBuffer), MSG_PEEK,
117 (
struct sockaddr *) &si_data_, (socklen_t*)
sizeof(si_data_));
119 TLOG(TLVL_INFO) <<
"Recieved UDP Packet with sequence number " << std::hex << (int)peekBuffer[1] <<
"!";
122 uint8_t seqNum = peekBuffer[1];
123 ReturnCode dataCode = getReturnCode(peekBuffer[0]);
124 if (seqNum >= expectedPacketNumber_ || (seqNum < 10 && expectedPacketNumber_ > 200) || droppedPackets > 0 || expectedPacketNumber_ - seqNum > 20)
126 if (seqNum != expectedPacketNumber_ && (seqNum >= expectedPacketNumber_ || (seqNum < 10 && expectedPacketNumber_ > 200)))
128 int deltaHi = seqNum - expectedPacketNumber_;
129 int deltaLo = 255 + seqNum - expectedPacketNumber_;
130 droppedPackets += deltaLo < 255 ? deltaLo : deltaHi;
131 TLOG(TLVL_WARNING) <<
"Dropped/Delayed packets detected: " << droppedPackets << std::endl;
132 expectedPacketNumber_ = seqNum;
134 else if (seqNum != expectedPacketNumber_)
136 int delta = expectedPacketNumber_ - seqNum;
137 TLOG(TLVL_WARNING) <<
"Sequence Number significantly different than expected! (delta: " << delta <<
")";
140 if (dataCode == ReturnCode::Read || dataCode == ReturnCode::First)
142 packetBuffers_.clear();
145 recvfrom(datasocket_, &buffer[0],
sizeof(
packetBuffer_t), 0, (
struct sockaddr *) &si_data_, (socklen_t*)
sizeof(si_data_));
146 packetBuffers_.push_back(buffer);
147 TLOG(TLVL_DEBUG) <<
"Now placing UDP packet with sequence number " << std::hex << (int)seqNum <<
" into buffer.";
148 if (dataCode == ReturnCode::Read) { haveData =
true; }
155 else if ((dataCode == ReturnCode::Middle || dataCode == ReturnCode::Last) && packetBuffers_.size() > 0)
159 recvfrom(datasocket_, &buffer[0],
sizeof(
packetBuffer_t), 0, (
struct sockaddr *) &si_data_, (socklen_t*)
sizeof(si_data_));
160 if (droppedPackets == 0)
162 packetBuffers_.push_back(buffer);
164 else if (burst_end == -1 || seqNum < burst_end)
167 for (packetBuffer_list_t::iterator it = packetBuffers_.begin(); it != packetBuffers_.end(); ++it)
169 if (seqNum < (*it)[1])
171 packetBuffers_.insert(it, buffer);
173 expectedPacketNumber_--;
178 packetBuffers_.push_back(buffer);
181 TLOG(TLVL_DEBUG) <<
"Now placing UDP packet with sequence number " << std::hex << (int)seqNum <<
" into buffer.";
182 if (dataCode == ReturnCode::Last && droppedPackets == 0)
184 while (getReturnCode(packetBuffers_.back()[0]) != ReturnCode::Last) { packetBuffers_.pop_back(); }
187 else if (dataCode == ReturnCode::Last) { burst_end = seqNum; }
188 else if (burst_end >= 0 && droppedPackets == 0)
190 while (getReturnCode(packetBuffers_.back()[0]) != ReturnCode::Last) { packetBuffers_.pop_back(); }
195 ++expectedPacketNumber_;
200 recvfrom(datasocket_, &discardBuffer[0],
sizeof(discardBuffer), 0, (
struct sockaddr *) &si_data_, (socklen_t*)
sizeof(si_data_));
201 TLOG(TLVL_WARNING) <<
"Out-of-sequence packet detected and discarded!";
208 TLOG(TLVL_DEBUG) <<
"Recieved data, now placing data with UDP sequence number " << (int)firstPacket[1] <<
" into UDPFragment";
209 thisFrag.resize(1500 * packetBuffers_.size() + 1);
210 std::ofstream output;
213 std::string outputPath = rawPath_ +
"/UDPReceiver-" + ip_ +
":" + std::to_string(dataport_) +
".bin";
214 output.open(outputPath, std::ios::out | std::ios::app | std::ios::binary);
217 DataType dataType = getDataType(firstPacket[0]);
218 thisFrag.set_hdr_type((
int)dataType);
220 for (
auto jj : packetBuffers_)
222 for (
int ii = 2; ii < 1500; ++ii)
225 if (jj[ii] == 0 && (dataType == DataType::JSON || dataType == DataType::String)) {
break; }
227 if (rawOutput_) output.write((
char*)&(jj[ii]),
sizeof(uint8_t));
228 *(thisFrag.dataBegin() + pos) = jj[ii];
232 if (dataType == DataType::JSON || dataType == DataType::String)
234 *(thisFrag.dataBegin() + pos) = 0;
236 if (rawOutput_) output.write(&zero,
sizeof(
char));
238 if (rawOutput_) output.close();
243 void demo::UDPReceiver::start()
245 send(CommandType::Start_Burst);
248 void demo::UDPReceiver::stop()
250 send(CommandType::Stop_Burst);
253 void demo::UDPReceiver::pause()
255 send(CommandType::Stop_Burst);
258 void demo::UDPReceiver::resume()
260 send(CommandType::Start_Burst);
267 CommandPacket packet;
268 packet.type = command;
270 sendto(datasocket_, &packet,
sizeof(packet), 0, (
struct sockaddr *) &si_data_,
sizeof(si_data_));
ReturnCode
Enumeration describing status codes that indicate current sender position in the stream.
An artdaq::CommandableFragmentGenerator which receives data in the form of UDP datagrams.
CommandType
Enumeration describing valid command types.
DataType
Enumeration describing potential data types.
std::array< uint8_t, 1500 > packetBuffer_t
An array of 1500 bytes (MTU length)
UDPReceiver(fhicl::ParameterSet const &ps)
UDPReceiver Constructor.