3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 #include "connection.h"
24 #include "serialization.h"
27 #include "util/serialize.h"
28 #include "util/numeric.h"
29 #include "util/string.h"
36 /******************************************************************************/
37 /* defines used for debugging and profiling */
38 /******************************************************************************/
42 #undef DEBUG_CONNECTION_KBPS
44 /* this mutex is used to achieve log message consistency */
45 JMutex log_message_mutex;
48 JMutexAutoLock loglock(log_message_mutex); \
52 //#define DEBUG_CONNECTION_KBPS
53 #undef DEBUG_CONNECTION_KBPS
57 static inline float CALC_DTIME(unsigned int lasttime, unsigned int curtime) {
58 float value = ( curtime - lasttime) / 1000.0;
59 return MYMAX(MYMIN(value,0.1),0.0);
62 /* maximum window size to use, 0xFFFF is theoretical maximum don't think about
63 * touching it, the less you're away from it the more likely data corruption
66 #define MAX_RELIABLE_WINDOW_SIZE 0x8000
67 /* starting value for window size */
68 #define MIN_RELIABLE_WINDOW_SIZE 0x40
70 #define MAX_UDP_PEERS 65535
72 #define PING_TIMEOUT 5.0
74 static u16 readPeerId(u8 *packetdata)
76 return readU16(&packetdata[4]);
78 static u8 readChannel(u8 *packetdata)
80 return readU8(&packetdata[6]);
83 BufferedPacket makePacket(Address &address, u8 *data, u32 datasize,
84 u32 protocol_id, u16 sender_peer_id, u8 channel)
86 u32 packet_size = datasize + BASE_HEADER_SIZE;
87 BufferedPacket p(packet_size);
90 writeU32(&p.data[0], protocol_id);
91 writeU16(&p.data[4], sender_peer_id);
92 writeU8(&p.data[6], channel);
94 memcpy(&p.data[BASE_HEADER_SIZE], data, datasize);
99 BufferedPacket makePacket(Address &address, SharedBuffer<u8> &data,
100 u32 protocol_id, u16 sender_peer_id, u8 channel)
102 return makePacket(address, *data, data.getSize(),
103 protocol_id, sender_peer_id, channel);
106 SharedBuffer<u8> makeOriginalPacket(
107 SharedBuffer<u8> data)
110 u32 packet_size = data.getSize() + header_size;
111 SharedBuffer<u8> b(packet_size);
113 writeU8(&(b[0]), TYPE_ORIGINAL);
114 if (data.getSize() > 0) {
115 memcpy(&(b[header_size]), *data, data.getSize());
120 std::list<SharedBuffer<u8> > makeSplitPacket(
121 SharedBuffer<u8> data,
125 // Chunk packets, containing the TYPE_SPLIT header
126 std::list<SharedBuffer<u8> > chunks;
128 u32 chunk_header_size = 7;
129 u32 maximum_data_size = chunksize_max - chunk_header_size;
135 end = start + maximum_data_size - 1;
136 if (end > data.getSize() - 1)
137 end = data.getSize() - 1;
139 u32 payload_size = end - start + 1;
140 u32 packet_size = chunk_header_size + payload_size;
142 SharedBuffer<u8> chunk(packet_size);
144 writeU8(&chunk[0], TYPE_SPLIT);
145 writeU16(&chunk[1], seqnum);
146 // [3] u16 chunk_count is written at next stage
147 writeU16(&chunk[5], chunk_num);
148 memcpy(&chunk[chunk_header_size], &data[start], payload_size);
150 chunks.push_back(chunk);
156 while(end != data.getSize() - 1);
158 for(std::list<SharedBuffer<u8> >::iterator i = chunks.begin();
159 i != chunks.end(); ++i)
162 writeU16(&((*i)[3]), chunk_count);
168 std::list<SharedBuffer<u8> > makeAutoSplitPacket(
169 SharedBuffer<u8> data,
173 u32 original_header_size = 1;
174 std::list<SharedBuffer<u8> > list;
175 if (data.getSize() + original_header_size > chunksize_max)
177 list = makeSplitPacket(data, chunksize_max, split_seqnum);
183 list.push_back(makeOriginalPacket(data));
188 SharedBuffer<u8> makeReliablePacket(
189 SharedBuffer<u8> data,
193 u32 packet_size = data.getSize() + header_size;
194 SharedBuffer<u8> b(packet_size);
196 writeU8(&b[0], TYPE_RELIABLE);
197 writeU16(&b[1], seqnum);
199 memcpy(&b[header_size], *data, data.getSize());
208 ReliablePacketBuffer::ReliablePacketBuffer(): m_list_size(0) {}
210 void ReliablePacketBuffer::print()
212 JMutexAutoLock listlock(m_list_mutex);
213 LOG(dout_con<<"Dump of ReliablePacketBuffer:" << std::endl);
214 unsigned int index = 0;
215 for(std::list<BufferedPacket>::iterator i = m_list.begin();
219 u16 s = readU16(&(i->data[BASE_HEADER_SIZE+1]));
220 LOG(dout_con<<index<< ":" << s << std::endl);
224 bool ReliablePacketBuffer::empty()
226 JMutexAutoLock listlock(m_list_mutex);
227 return m_list.empty();
230 u32 ReliablePacketBuffer::size()
235 bool ReliablePacketBuffer::containsPacket(u16 seqnum)
237 return !(findPacket(seqnum) == m_list.end());
240 RPBSearchResult ReliablePacketBuffer::findPacket(u16 seqnum)
242 std::list<BufferedPacket>::iterator i = m_list.begin();
243 for(; i != m_list.end(); ++i)
245 u16 s = readU16(&(i->data[BASE_HEADER_SIZE+1]));
246 /*dout_con<<"findPacket(): finding seqnum="<<seqnum
247 <<", comparing to s="<<s<<std::endl;*/
253 RPBSearchResult ReliablePacketBuffer::notFound()
257 bool ReliablePacketBuffer::getFirstSeqnum(u16& result)
259 JMutexAutoLock listlock(m_list_mutex);
262 BufferedPacket p = *m_list.begin();
263 result = readU16(&p.data[BASE_HEADER_SIZE+1]);
267 BufferedPacket ReliablePacketBuffer::popFirst()
269 JMutexAutoLock listlock(m_list_mutex);
271 throw NotFoundException("Buffer is empty");
272 BufferedPacket p = *m_list.begin();
273 m_list.erase(m_list.begin());
276 if (m_list_size == 0) {
277 m_oldest_non_answered_ack = 0;
279 m_oldest_non_answered_ack =
280 readU16(&(*m_list.begin()).data[BASE_HEADER_SIZE+1]);
284 BufferedPacket ReliablePacketBuffer::popSeqnum(u16 seqnum)
286 JMutexAutoLock listlock(m_list_mutex);
287 RPBSearchResult r = findPacket(seqnum);
288 if (r == notFound()) {
289 LOG(dout_con<<"Sequence number: " << seqnum
290 << " not found in reliable buffer"<<std::endl);
291 throw NotFoundException("seqnum not found in buffer");
293 BufferedPacket p = *r;
296 RPBSearchResult next = r;
298 if (next != notFound()) {
299 u16 s = readU16(&(next->data[BASE_HEADER_SIZE+1]));
300 m_oldest_non_answered_ack = s;
306 if (m_list_size == 0)
307 { m_oldest_non_answered_ack = 0; }
309 { m_oldest_non_answered_ack = readU16(&(*m_list.begin()).data[BASE_HEADER_SIZE+1]); }
312 void ReliablePacketBuffer::insert(BufferedPacket &p,u16 next_expected)
314 JMutexAutoLock listlock(m_list_mutex);
315 FATAL_ERROR_IF(p.data.getSize() < BASE_HEADER_SIZE+3, "Invalid data size");
316 u8 type = readU8(&p.data[BASE_HEADER_SIZE+0]);
317 sanity_check(type == TYPE_RELIABLE);
318 u16 seqnum = readU16(&p.data[BASE_HEADER_SIZE+1]);
320 sanity_check(seqnum_in_window(seqnum, next_expected, MAX_RELIABLE_WINDOW_SIZE));
321 sanity_check(seqnum != next_expected);
324 sanity_check(m_list_size <= SEQNUM_MAX+1); // FIXME: Handle the error?
326 // Find the right place for the packet and insert it there
327 // If list is empty, just add it
331 m_oldest_non_answered_ack = seqnum;
336 // Otherwise find the right place
337 std::list<BufferedPacket>::iterator i = m_list.begin();
338 // Find the first packet in the list which has a higher seqnum
339 u16 s = readU16(&(i->data[BASE_HEADER_SIZE+1]));
341 /* case seqnum is smaller then next_expected seqnum */
342 /* this is true e.g. on wrap around */
343 if (seqnum < next_expected) {
344 while(((s < seqnum) || (s >= next_expected)) && (i != m_list.end())) {
346 if (i != m_list.end())
347 s = readU16(&(i->data[BASE_HEADER_SIZE+1]));
350 /* non wrap around case (at least for incoming and next_expected */
353 while(((s < seqnum) && (s >= next_expected)) && (i != m_list.end())) {
355 if (i != m_list.end())
356 s = readU16(&(i->data[BASE_HEADER_SIZE+1]));
362 (readU16(&(i->data[BASE_HEADER_SIZE+1])) != seqnum) ||
363 (i->data.getSize() != p.data.getSize()) ||
364 (i->address != p.address)
367 /* if this happens your maximum transfer window may be to big */
369 "Duplicated seqnum %d non matching packet detected:\n",
371 fprintf(stderr, "Old: seqnum: %05d size: %04d, address: %s\n",
372 readU16(&(i->data[BASE_HEADER_SIZE+1])),i->data.getSize(),
373 i->address.serializeString().c_str());
374 fprintf(stderr, "New: seqnum: %05d size: %04u, address: %s\n",
375 readU16(&(p.data[BASE_HEADER_SIZE+1])),p.data.getSize(),
376 p.address.serializeString().c_str());
377 throw IncomingDataCorruption("duplicated packet isn't same as original one");
380 sanity_check(readU16(&(i->data[BASE_HEADER_SIZE+1])) == seqnum);
381 sanity_check(i->data.getSize() == p.data.getSize());
382 sanity_check(i->address == p.address);
384 /* nothing to do this seems to be a resent packet */
385 /* for paranoia reason data should be compared */
388 /* insert or push back */
389 else if (i != m_list.end()) {
396 /* update last packet number */
397 m_oldest_non_answered_ack = readU16(&(*m_list.begin()).data[BASE_HEADER_SIZE+1]);
400 void ReliablePacketBuffer::incrementTimeouts(float dtime)
402 JMutexAutoLock listlock(m_list_mutex);
403 for(std::list<BufferedPacket>::iterator i = m_list.begin();
404 i != m_list.end(); ++i)
407 i->totaltime += dtime;
411 std::list<BufferedPacket> ReliablePacketBuffer::getTimedOuts(float timeout,
412 unsigned int max_packets)
414 JMutexAutoLock listlock(m_list_mutex);
415 std::list<BufferedPacket> timed_outs;
416 for(std::list<BufferedPacket>::iterator i = m_list.begin();
417 i != m_list.end(); ++i)
419 if (i->time >= timeout) {
420 timed_outs.push_back(*i);
422 //this packet will be sent right afterwards reset timeout here
424 if (timed_outs.size() >= max_packets)
435 IncomingSplitBuffer::~IncomingSplitBuffer()
437 JMutexAutoLock listlock(m_map_mutex);
438 for(std::map<u16, IncomingSplitPacket*>::iterator i = m_buf.begin();
439 i != m_buf.end(); ++i)
445 This will throw a GotSplitPacketException when a full
446 split packet is constructed.
448 SharedBuffer<u8> IncomingSplitBuffer::insert(BufferedPacket &p, bool reliable)
450 JMutexAutoLock listlock(m_map_mutex);
451 u32 headersize = BASE_HEADER_SIZE + 7;
452 FATAL_ERROR_IF(p.data.getSize() < headersize, "Invalid data size");
453 u8 type = readU8(&p.data[BASE_HEADER_SIZE+0]);
454 sanity_check(type == TYPE_SPLIT);
455 u16 seqnum = readU16(&p.data[BASE_HEADER_SIZE+1]);
456 u16 chunk_count = readU16(&p.data[BASE_HEADER_SIZE+3]);
457 u16 chunk_num = readU16(&p.data[BASE_HEADER_SIZE+5]);
459 // Add if doesn't exist
460 if (m_buf.find(seqnum) == m_buf.end())
462 IncomingSplitPacket *sp = new IncomingSplitPacket();
463 sp->chunk_count = chunk_count;
464 sp->reliable = reliable;
468 IncomingSplitPacket *sp = m_buf[seqnum];
470 // TODO: These errors should be thrown or something? Dunno.
471 if (chunk_count != sp->chunk_count)
472 LOG(derr_con<<"Connection: WARNING: chunk_count="<<chunk_count
473 <<" != sp->chunk_count="<<sp->chunk_count
475 if (reliable != sp->reliable)
476 LOG(derr_con<<"Connection: WARNING: reliable="<<reliable
477 <<" != sp->reliable="<<sp->reliable
480 // If chunk already exists, ignore it.
481 // Sometimes two identical packets may arrive when there is network
482 // lag and the server re-sends stuff.
483 if (sp->chunks.find(chunk_num) != sp->chunks.end())
484 return SharedBuffer<u8>();
486 // Cut chunk data out of packet
487 u32 chunkdatasize = p.data.getSize() - headersize;
488 SharedBuffer<u8> chunkdata(chunkdatasize);
489 memcpy(*chunkdata, &(p.data[headersize]), chunkdatasize);
491 // Set chunk data in buffer
492 sp->chunks[chunk_num] = chunkdata;
494 // If not all chunks are received, return empty buffer
495 if (sp->allReceived() == false)
496 return SharedBuffer<u8>();
498 // Calculate total size
500 for(std::map<u16, SharedBuffer<u8> >::iterator i = sp->chunks.begin();
501 i != sp->chunks.end(); ++i)
503 totalsize += i->second.getSize();
506 SharedBuffer<u8> fulldata(totalsize);
508 // Copy chunks to data buffer
510 for(u32 chunk_i=0; chunk_i<sp->chunk_count;
513 SharedBuffer<u8> buf = sp->chunks[chunk_i];
514 u16 chunkdatasize = buf.getSize();
515 memcpy(&fulldata[start], *buf, chunkdatasize);
516 start += chunkdatasize;;
519 // Remove sp from buffer
525 void IncomingSplitBuffer::removeUnreliableTimedOuts(float dtime, float timeout)
527 std::list<u16> remove_queue;
529 JMutexAutoLock listlock(m_map_mutex);
530 for(std::map<u16, IncomingSplitPacket*>::iterator i = m_buf.begin();
531 i != m_buf.end(); ++i)
533 IncomingSplitPacket *p = i->second;
534 // Reliable ones are not removed by timeout
535 if (p->reliable == true)
538 if (p->time >= timeout)
539 remove_queue.push_back(i->first);
542 for(std::list<u16>::iterator j = remove_queue.begin();
543 j != remove_queue.end(); ++j)
545 JMutexAutoLock listlock(m_map_mutex);
546 LOG(dout_con<<"NOTE: Removing timed out unreliable split packet"<<std::endl);
557 window_size(MIN_RELIABLE_WINDOW_SIZE),
558 next_incoming_seqnum(SEQNUM_INITIAL),
559 next_outgoing_seqnum(SEQNUM_INITIAL),
560 next_outgoing_split_seqnum(SEQNUM_INITIAL),
561 current_packet_loss(0),
562 current_packet_too_late(0),
563 current_packet_successfull(0),
564 packet_loss_counter(0),
565 current_bytes_transfered(0),
566 current_bytes_received(0),
567 current_bytes_lost(0),
571 max_incoming_kbps(0.0),
572 cur_incoming_kbps(0.0),
573 avg_incoming_kbps(0.0),
586 u16 Channel::readNextIncomingSeqNum()
588 JMutexAutoLock internal(m_internal_mutex);
589 return next_incoming_seqnum;
592 u16 Channel::incNextIncomingSeqNum()
594 JMutexAutoLock internal(m_internal_mutex);
595 u16 retval = next_incoming_seqnum;
596 next_incoming_seqnum++;
600 u16 Channel::readNextSplitSeqNum()
602 JMutexAutoLock internal(m_internal_mutex);
603 return next_outgoing_split_seqnum;
605 void Channel::setNextSplitSeqNum(u16 seqnum)
607 JMutexAutoLock internal(m_internal_mutex);
608 next_outgoing_split_seqnum = seqnum;
611 u16 Channel::getOutgoingSequenceNumber(bool& successful)
613 JMutexAutoLock internal(m_internal_mutex);
614 u16 retval = next_outgoing_seqnum;
615 u16 lowest_unacked_seqnumber;
617 /* shortcut if there ain't any packet in outgoing list */
618 if (outgoing_reliables_sent.empty())
620 next_outgoing_seqnum++;
624 if (outgoing_reliables_sent.getFirstSeqnum(lowest_unacked_seqnumber))
626 if (lowest_unacked_seqnumber < next_outgoing_seqnum) {
627 // ugly cast but this one is required in order to tell compiler we
628 // know about difference of two unsigned may be negative in general
629 // but we already made sure it won't happen in this case
630 if (((u16)(next_outgoing_seqnum - lowest_unacked_seqnumber)) > window_size) {
636 // ugly cast but this one is required in order to tell compiler we
637 // know about difference of two unsigned may be negative in general
638 // but we already made sure it won't happen in this case
639 if ((next_outgoing_seqnum + (u16)(SEQNUM_MAX - lowest_unacked_seqnumber)) >
647 next_outgoing_seqnum++;
651 u16 Channel::readOutgoingSequenceNumber()
653 JMutexAutoLock internal(m_internal_mutex);
654 return next_outgoing_seqnum;
657 bool Channel::putBackSequenceNumber(u16 seqnum)
659 if (((seqnum + 1) % (SEQNUM_MAX+1)) == next_outgoing_seqnum) {
661 next_outgoing_seqnum = seqnum;
667 void Channel::UpdateBytesSent(unsigned int bytes, unsigned int packets)
669 JMutexAutoLock internal(m_internal_mutex);
670 current_bytes_transfered += bytes;
671 current_packet_successfull += packets;
674 void Channel::UpdateBytesReceived(unsigned int bytes) {
675 JMutexAutoLock internal(m_internal_mutex);
676 current_bytes_received += bytes;
679 void Channel::UpdateBytesLost(unsigned int bytes)
681 JMutexAutoLock internal(m_internal_mutex);
682 current_bytes_lost += bytes;
686 void Channel::UpdatePacketLossCounter(unsigned int count)
688 JMutexAutoLock internal(m_internal_mutex);
689 current_packet_loss += count;
692 void Channel::UpdatePacketTooLateCounter()
694 JMutexAutoLock internal(m_internal_mutex);
695 current_packet_too_late++;
698 void Channel::UpdateTimers(float dtime,bool legacy_peer)
700 bpm_counter += dtime;
701 packet_loss_counter += dtime;
703 if (packet_loss_counter > 1.0)
705 packet_loss_counter -= 1.0;
707 unsigned int packet_loss = 11; /* use a neutral value for initialization */
708 unsigned int packets_successfull = 0;
709 //unsigned int packet_too_late = 0;
711 bool reasonable_amount_of_data_transmitted = false;
714 JMutexAutoLock internal(m_internal_mutex);
715 packet_loss = current_packet_loss;
716 //packet_too_late = current_packet_too_late;
717 packets_successfull = current_packet_successfull;
719 if (current_bytes_transfered > (unsigned int) (window_size*512/2))
721 reasonable_amount_of_data_transmitted = true;
723 current_packet_loss = 0;
724 current_packet_too_late = 0;
725 current_packet_successfull = 0;
728 /* dynamic window size is only available for non legacy peers */
730 float successfull_to_lost_ratio = 0.0;
733 if (packets_successfull > 0) {
734 successfull_to_lost_ratio = packet_loss/packets_successfull;
736 else if (packet_loss > 0)
740 MIN_RELIABLE_WINDOW_SIZE);
746 if ((successfull_to_lost_ratio < 0.01) &&
747 (window_size < MAX_RELIABLE_WINDOW_SIZE))
749 /* don't even think about increasing if we didn't even
750 * use major parts of our window */
751 if (reasonable_amount_of_data_transmitted)
754 MAX_RELIABLE_WINDOW_SIZE);
756 else if ((successfull_to_lost_ratio < 0.05) &&
757 (window_size < MAX_RELIABLE_WINDOW_SIZE))
759 /* don't even think about increasing if we didn't even
760 * use major parts of our window */
761 if (reasonable_amount_of_data_transmitted)
764 MAX_RELIABLE_WINDOW_SIZE);
766 else if (successfull_to_lost_ratio > 0.15)
770 MIN_RELIABLE_WINDOW_SIZE);
772 else if (successfull_to_lost_ratio > 0.1)
776 MIN_RELIABLE_WINDOW_SIZE);
782 if (bpm_counter > 10.0)
785 JMutexAutoLock internal(m_internal_mutex);
787 (((float) current_bytes_transfered)/bpm_counter)/1024.0;
788 current_bytes_transfered = 0;
790 (((float) current_bytes_lost)/bpm_counter)/1024.0;
791 current_bytes_lost = 0;
793 (((float) current_bytes_received)/bpm_counter)/1024.0;
794 current_bytes_received = 0;
798 if (cur_kbps > max_kbps)
803 if (cur_kbps_lost > max_kbps_lost)
805 max_kbps_lost = cur_kbps_lost;
808 if (cur_incoming_kbps > max_incoming_kbps) {
809 max_incoming_kbps = cur_incoming_kbps;
812 rate_samples = MYMIN(rate_samples+1,10);
813 float old_fraction = ((float) (rate_samples-1) )/( (float) rate_samples);
814 avg_kbps = avg_kbps * old_fraction +
815 cur_kbps * (1.0 - old_fraction);
816 avg_kbps_lost = avg_kbps_lost * old_fraction +
817 cur_kbps_lost * (1.0 - old_fraction);
818 avg_incoming_kbps = avg_incoming_kbps * old_fraction +
819 cur_incoming_kbps * (1.0 - old_fraction);
828 PeerHelper::PeerHelper() :
832 PeerHelper::PeerHelper(Peer* peer) :
837 if (!peer->IncUseCount())
844 PeerHelper::~PeerHelper()
847 m_peer->DecUseCount();
852 PeerHelper& PeerHelper::operator=(Peer* peer)
857 if (!peer->IncUseCount())
865 Peer* PeerHelper::operator->() const
870 Peer* PeerHelper::operator&() const
875 bool PeerHelper::operator!() {
879 bool PeerHelper::operator!=(void* ptr)
881 return ((void*) m_peer != ptr);
884 bool Peer::IncUseCount()
886 JMutexAutoLock lock(m_exclusive_access_mutex);
888 if (!m_pending_deletion)
897 void Peer::DecUseCount()
900 JMutexAutoLock lock(m_exclusive_access_mutex);
901 sanity_check(m_usage > 0);
904 if (!((m_pending_deletion) && (m_usage == 0)))
910 void Peer::RTTStatistics(float rtt, std::string profiler_id,
911 unsigned int num_samples) {
913 if (m_last_rtt > 0) {
914 /* set min max values */
915 if (rtt < m_rtt.min_rtt)
917 if (rtt >= m_rtt.max_rtt)
920 /* do average calculation */
921 if (m_rtt.avg_rtt < 0.0)
924 m_rtt.avg_rtt = m_rtt.avg_rtt * (num_samples/(num_samples-1)) +
925 rtt * (1/num_samples);
927 /* do jitter calculation */
929 //just use some neutral value at beginning
930 float jitter = m_rtt.jitter_min;
932 if (rtt > m_last_rtt)
933 jitter = rtt-m_last_rtt;
935 if (rtt <= m_last_rtt)
936 jitter = m_last_rtt - rtt;
938 if (jitter < m_rtt.jitter_min)
939 m_rtt.jitter_min = jitter;
940 if (jitter >= m_rtt.jitter_max)
941 m_rtt.jitter_max = jitter;
943 if (m_rtt.jitter_avg < 0.0)
944 m_rtt.jitter_avg = jitter;
946 m_rtt.jitter_avg = m_rtt.jitter_avg * (num_samples/(num_samples-1)) +
947 jitter * (1/num_samples);
949 if (profiler_id != "")
951 g_profiler->graphAdd(profiler_id + "_rtt", rtt);
952 g_profiler->graphAdd(profiler_id + "_jitter", jitter);
955 /* save values required for next loop */
959 bool Peer::isTimedOut(float timeout)
961 JMutexAutoLock lock(m_exclusive_access_mutex);
962 u32 current_time = porting::getTimeMs();
964 float dtime = CALC_DTIME(m_last_timeout_check,current_time);
965 m_last_timeout_check = current_time;
967 m_timeout_counter += dtime;
969 return m_timeout_counter > timeout;
975 JMutexAutoLock usage_lock(m_exclusive_access_mutex);
976 m_pending_deletion = true;
981 PROFILE(std::stringstream peerIdentifier1);
982 PROFILE(peerIdentifier1 << "runTimeouts[" << m_connection->getDesc()
983 << ";" << id << ";RELIABLE]");
984 PROFILE(g_profiler->remove(peerIdentifier1.str()));
985 PROFILE(std::stringstream peerIdentifier2);
986 PROFILE(peerIdentifier2 << "sendPackets[" << m_connection->getDesc()
987 << ";" << id << ";RELIABLE]");
988 PROFILE(ScopeProfiler peerprofiler(g_profiler, peerIdentifier2.str(), SPT_AVG));
993 UDPPeer::UDPPeer(u16 a_id, Address a_address, Connection* connection) :
994 Peer(a_address,a_id,connection),
995 m_pending_disconnect(false),
1001 bool UDPPeer::getAddress(MTProtocols type,Address& toset)
1003 if ((type == MTP_UDP) || (type == MTP_MINETEST_RELIABLE_UDP) || (type == MTP_PRIMARY))
1012 void UDPPeer::setNonLegacyPeer()
1014 m_legacy_peer = false;
1015 for(unsigned int i=0; i< CHANNEL_COUNT; i++)
1017 channels->setWindowSize(g_settings->getU16("max_packets_per_iteration"));
1021 void UDPPeer::reportRTT(float rtt)
1026 RTTStatistics(rtt,"rudp",MAX_RELIABLE_WINDOW_SIZE*10);
1028 float timeout = getStat(AVG_RTT) * RESEND_TIMEOUT_FACTOR;
1029 if (timeout < RESEND_TIMEOUT_MIN)
1030 timeout = RESEND_TIMEOUT_MIN;
1031 if (timeout > RESEND_TIMEOUT_MAX)
1032 timeout = RESEND_TIMEOUT_MAX;
1034 JMutexAutoLock usage_lock(m_exclusive_access_mutex);
1035 resend_timeout = timeout;
1038 bool UDPPeer::Ping(float dtime,SharedBuffer<u8>& data)
1040 m_ping_timer += dtime;
1041 if (m_ping_timer >= PING_TIMEOUT)
1043 // Create and send PING packet
1044 writeU8(&data[0], TYPE_CONTROL);
1045 writeU8(&data[1], CONTROLTYPE_PING);
1052 void UDPPeer::PutReliableSendCommand(ConnectionCommand &c,
1053 unsigned int max_packet_size)
1055 if (m_pending_disconnect)
1058 if ( channels[c.channelnum].queued_commands.empty() &&
1059 /* don't queue more packets then window size */
1060 (channels[c.channelnum].queued_reliables.size()
1061 < (channels[c.channelnum].getWindowSize()/2))) {
1062 LOG(dout_con<<m_connection->getDesc()
1063 <<" processing reliable command for peer id: " << c.peer_id
1064 <<" data size: " << c.data.getSize() << std::endl);
1065 if (!processReliableSendCommand(c,max_packet_size)) {
1066 channels[c.channelnum].queued_commands.push_back(c);
1070 LOG(dout_con<<m_connection->getDesc()
1071 <<" Queueing reliable command for peer id: " << c.peer_id
1072 <<" data size: " << c.data.getSize() <<std::endl);
1073 channels[c.channelnum].queued_commands.push_back(c);
1077 bool UDPPeer::processReliableSendCommand(
1078 ConnectionCommand &c,
1079 unsigned int max_packet_size)
1081 if (m_pending_disconnect)
1084 u32 chunksize_max = max_packet_size
1086 - RELIABLE_HEADER_SIZE;
1088 sanity_check(c.data.getSize() < MAX_RELIABLE_WINDOW_SIZE*512);
1090 std::list<SharedBuffer<u8> > originals;
1091 u16 split_sequence_number = channels[c.channelnum].readNextSplitSeqNum();
1095 originals.push_back(c.data);
1098 originals = makeAutoSplitPacket(c.data, chunksize_max,split_sequence_number);
1099 channels[c.channelnum].setNextSplitSeqNum(split_sequence_number);
1102 bool have_sequence_number = true;
1103 bool have_initial_sequence_number = false;
1104 std::queue<BufferedPacket> toadd;
1105 volatile u16 initial_sequence_number = 0;
1107 for(std::list<SharedBuffer<u8> >::iterator i = originals.begin();
1108 i != originals.end(); ++i)
1110 u16 seqnum = channels[c.channelnum].getOutgoingSequenceNumber(have_sequence_number);
1112 /* oops, we don't have enough sequence numbers to send this packet */
1113 if (!have_sequence_number)
1116 if (!have_initial_sequence_number)
1118 initial_sequence_number = seqnum;
1119 have_initial_sequence_number = true;
1122 SharedBuffer<u8> reliable = makeReliablePacket(*i, seqnum);
1124 // Add base headers and make a packet
1125 BufferedPacket p = con::makePacket(address, reliable,
1126 m_connection->GetProtocolID(), m_connection->GetPeerID(),
1132 if (have_sequence_number) {
1133 volatile u16 pcount = 0;
1134 while(toadd.size() > 0) {
1135 BufferedPacket p = toadd.front();
1137 // LOG(dout_con<<connection->getDesc()
1138 // << " queuing reliable packet for peer_id: " << c.peer_id
1139 // << " channel: " << (c.channelnum&0xFF)
1140 // << " seqnum: " << readU16(&p.data[BASE_HEADER_SIZE+1])
1142 channels[c.channelnum].queued_reliables.push(p);
1145 sanity_check(channels[c.channelnum].queued_reliables.size() < 0xFFFF);
1149 volatile u16 packets_available = toadd.size();
1150 /* we didn't get a single sequence number no need to fill queue */
1151 if (!have_initial_sequence_number)
1155 while(toadd.size() > 0) {
1159 bool successfully_put_back_sequence_number
1160 = channels[c.channelnum].putBackSequenceNumber(
1161 (initial_sequence_number+toadd.size() % (SEQNUM_MAX+1)));
1163 FATAL_ERROR_IF(!successfully_put_back_sequence_number, "error");
1165 LOG(dout_con<<m_connection->getDesc()
1166 << " Windowsize exceeded on reliable sending "
1167 << c.data.getSize() << " bytes"
1168 << std::endl << "\t\tinitial_sequence_number: "
1169 << initial_sequence_number
1170 << std::endl << "\t\tgot at most : "
1171 << packets_available << " packets"
1172 << std::endl << "\t\tpackets queued : "
1173 << channels[c.channelnum].outgoing_reliables_sent.size()
1179 void UDPPeer::RunCommandQueues(
1180 unsigned int max_packet_size,
1181 unsigned int maxcommands,
1182 unsigned int maxtransfer)
1185 for (unsigned int i = 0; i < CHANNEL_COUNT; i++) {
1186 unsigned int commands_processed = 0;
1188 if ((channels[i].queued_commands.size() > 0) &&
1189 (channels[i].queued_reliables.size() < maxtransfer) &&
1190 (commands_processed < maxcommands)) {
1192 ConnectionCommand c = channels[i].queued_commands.front();
1194 LOG(dout_con << m_connection->getDesc()
1195 << " processing queued reliable command " << std::endl);
1197 // Packet is processed, remove it from queue
1198 if (processReliableSendCommand(c,max_packet_size)) {
1199 channels[i].queued_commands.pop_front();
1201 LOG(dout_con << m_connection->getDesc()
1202 << " Failed to queue packets for peer_id: " << c.peer_id
1203 << ", delaying sending of " << c.data.getSize()
1204 << " bytes" << std::endl);
1207 catch (ItemNotFoundException &e) {
1208 // intentionally empty
1214 u16 UDPPeer::getNextSplitSequenceNumber(u8 channel)
1216 assert(channel < CHANNEL_COUNT); // Pre-condition
1217 return channels[channel].readNextIncomingSeqNum();
1220 void UDPPeer::setNextSplitSequenceNumber(u8 channel, u16 seqnum)
1222 assert(channel < CHANNEL_COUNT); // Pre-condition
1223 channels[channel].setNextSplitSeqNum(seqnum);
1226 SharedBuffer<u8> UDPPeer::addSpiltPacket(u8 channel,
1227 BufferedPacket toadd,
1230 assert(channel < CHANNEL_COUNT); // Pre-condition
1231 return channels[channel].incoming_splits.insert(toadd,reliable);
1234 /******************************************************************************/
1235 /* Connection Threads */
1236 /******************************************************************************/
1238 ConnectionSendThread::ConnectionSendThread( unsigned int max_packet_size,
1241 m_max_packet_size(max_packet_size),
1243 m_max_commands_per_iteration(1),
1244 m_max_data_packets_per_iteration(g_settings->getU16("max_packets_per_iteration")),
1245 m_max_packets_requeued(256)
1249 void * ConnectionSendThread::Thread()
1251 assert(m_connection != NULL);
1253 log_register_thread("ConnectionSend");
1255 LOG(dout_con<<m_connection->getDesc()
1256 <<"ConnectionSend thread started"<<std::endl);
1258 u32 curtime = porting::getTimeMs();
1259 u32 lasttime = curtime;
1261 PROFILE(std::stringstream ThreadIdentifier);
1262 PROFILE(ThreadIdentifier << "ConnectionSend: [" << m_connection->getDesc() << "]");
1264 porting::setThreadName("ConnectionSend");
1266 /* if stop is requested don't stop immediately but try to send all */
1268 while(!StopRequested() || packetsQueued()) {
1269 BEGIN_DEBUG_EXCEPTION_HANDLER
1270 PROFILE(ScopeProfiler sp(g_profiler, ThreadIdentifier.str(), SPT_AVG));
1272 m_iteration_packets_avaialble = m_max_data_packets_per_iteration;
1274 /* wait for trigger or timeout */
1275 m_send_sleep_semaphore.Wait(50);
1277 /* remove all triggers */
1278 while(m_send_sleep_semaphore.Wait(0)) {}
1281 curtime = porting::getTimeMs();
1282 float dtime = CALC_DTIME(lasttime,curtime);
1284 /* first do all the reliable stuff */
1287 /* translate commands to packets */
1288 ConnectionCommand c = m_connection->m_command_queue.pop_frontNoEx(0);
1289 while(c.type != CONNCMD_NONE)
1292 processReliableCommand(c);
1294 processNonReliableCommand(c);
1296 c = m_connection->m_command_queue.pop_frontNoEx(0);
1299 /* send non reliable packets */
1302 END_DEBUG_EXCEPTION_HANDLER(errorstream);
1305 PROFILE(g_profiler->remove(ThreadIdentifier.str()));
1309 void ConnectionSendThread::Trigger()
1311 m_send_sleep_semaphore.Post();
1314 bool ConnectionSendThread::packetsQueued()
1316 std::list<u16> peerIds = m_connection->getPeerIDs();
1318 if (!m_outgoing_queue.empty() && !peerIds.empty())
1321 for(std::list<u16>::iterator j = peerIds.begin();
1322 j != peerIds.end(); ++j)
1324 PeerHelper peer = m_connection->getPeerNoEx(*j);
1329 if (dynamic_cast<UDPPeer*>(&peer) == 0)
1332 for(u16 i=0; i < CHANNEL_COUNT; i++) {
1333 Channel *channel = &(dynamic_cast<UDPPeer*>(&peer))->channels[i];
1335 if (channel->queued_commands.size() > 0) {
1345 void ConnectionSendThread::runTimeouts(float dtime)
1347 std::list<u16> timeouted_peers;
1348 std::list<u16> peerIds = m_connection->getPeerIDs();
1350 for(std::list<u16>::iterator j = peerIds.begin();
1351 j != peerIds.end(); ++j)
1353 PeerHelper peer = m_connection->getPeerNoEx(*j);
1358 if (dynamic_cast<UDPPeer*>(&peer) == 0)
1361 PROFILE(std::stringstream peerIdentifier);
1362 PROFILE(peerIdentifier << "runTimeouts[" << m_connection->getDesc()
1363 << ";" << *j << ";RELIABLE]");
1364 PROFILE(ScopeProfiler peerprofiler(g_profiler, peerIdentifier.str(), SPT_AVG));
1366 SharedBuffer<u8> data(2); // data for sending ping, required here because of goto
1371 if (peer->isTimedOut(m_timeout))
1373 infostream<<m_connection->getDesc()
1374 <<"RunTimeouts(): Peer "<<peer->id
1376 <<" (source=peer->timeout_counter)"
1378 // Add peer to the list
1379 timeouted_peers.push_back(peer->id);
1380 // Don't bother going through the buffers of this one
1384 float resend_timeout = dynamic_cast<UDPPeer*>(&peer)->getResendTimeout();
1385 for(u16 i=0; i<CHANNEL_COUNT; i++)
1387 std::list<BufferedPacket> timed_outs;
1388 Channel *channel = &(dynamic_cast<UDPPeer*>(&peer))->channels[i];
1390 if (dynamic_cast<UDPPeer*>(&peer)->getLegacyPeer())
1391 channel->setWindowSize(g_settings->getU16("workaround_window_size"));
1393 // Remove timed out incomplete unreliable split packets
1394 channel->incoming_splits.removeUnreliableTimedOuts(dtime, m_timeout);
1396 // Increment reliable packet times
1397 channel->outgoing_reliables_sent.incrementTimeouts(dtime);
1399 unsigned int numpeers = m_connection->m_peers.size();
1404 // Re-send timed out outgoing reliables
1405 timed_outs = channel->
1406 outgoing_reliables_sent.getTimedOuts(resend_timeout,
1407 (m_max_data_packets_per_iteration/numpeers));
1409 channel->UpdatePacketLossCounter(timed_outs.size());
1410 g_profiler->graphAdd("packets_lost", timed_outs.size());
1412 m_iteration_packets_avaialble -= timed_outs.size();
1414 for(std::list<BufferedPacket>::iterator k = timed_outs.begin();
1415 k != timed_outs.end(); ++k)
1417 u16 peer_id = readPeerId(*(k->data));
1418 u8 channelnum = readChannel(*(k->data));
1419 u16 seqnum = readU16(&(k->data[BASE_HEADER_SIZE+1]));
1421 channel->UpdateBytesLost(k->data.getSize());
1424 LOG(derr_con<<m_connection->getDesc()
1425 <<"RE-SENDING timed-out RELIABLE to "
1426 << k->address.serializeString()
1427 << "(t/o="<<resend_timeout<<"): "
1428 <<"from_peer_id="<<peer_id
1429 <<", channel="<<((int)channelnum&0xff)
1430 <<", seqnum="<<seqnum
1435 // do not handle rtt here as we can't decide if this packet was
1436 // lost or really takes more time to transmit
1438 channel->UpdateTimers(dtime,dynamic_cast<UDPPeer*>(&peer)->getLegacyPeer());
1441 /* send ping if necessary */
1442 if (dynamic_cast<UDPPeer*>(&peer)->Ping(dtime,data)) {
1443 LOG(dout_con<<m_connection->getDesc()
1444 <<"Sending ping for peer_id: "
1445 << dynamic_cast<UDPPeer*>(&peer)->id <<std::endl);
1446 /* this may fail if there ain't a sequence number left */
1447 if (!rawSendAsPacket(dynamic_cast<UDPPeer*>(&peer)->id, 0, data, true))
1449 //retrigger with reduced ping interval
1450 dynamic_cast<UDPPeer*>(&peer)->Ping(4.0,data);
1454 dynamic_cast<UDPPeer*>(&peer)->RunCommandQueues(m_max_packet_size,
1455 m_max_commands_per_iteration,
1456 m_max_packets_requeued);
1459 // Remove timed out peers
1460 for(std::list<u16>::iterator i = timeouted_peers.begin();
1461 i != timeouted_peers.end(); ++i)
1463 LOG(derr_con<<m_connection->getDesc()
1464 <<"RunTimeouts(): Removing peer "<<(*i)<<std::endl);
1465 m_connection->deletePeer(*i, true);
1469 void ConnectionSendThread::rawSend(const BufferedPacket &packet)
1472 m_connection->m_udpSocket.Send(packet.address, *packet.data,
1473 packet.data.getSize());
1474 LOG(dout_con <<m_connection->getDesc()
1475 << " rawSend: " << packet.data.getSize()
1476 << " bytes sent" << std::endl);
1477 } catch(SendFailedException &e) {
1478 LOG(derr_con<<m_connection->getDesc()
1479 <<"Connection::rawSend(): SendFailedException: "
1480 <<packet.address.serializeString()<<std::endl);
1484 void ConnectionSendThread::sendAsPacketReliable(BufferedPacket& p, Channel* channel)
1487 p.absolute_send_time = porting::getTimeMs();
1488 // Buffer the packet
1489 channel->outgoing_reliables_sent.insert(p,
1490 (channel->readOutgoingSequenceNumber() - MAX_RELIABLE_WINDOW_SIZE)
1491 % (MAX_RELIABLE_WINDOW_SIZE+1));
1493 catch(AlreadyExistsException &e)
1495 LOG(derr_con<<m_connection->getDesc()
1496 <<"WARNING: Going to send a reliable packet"
1497 <<" in outgoing buffer" <<std::endl);
1504 bool ConnectionSendThread::rawSendAsPacket(u16 peer_id, u8 channelnum,
1505 SharedBuffer<u8> data, bool reliable)
1507 PeerHelper peer = m_connection->getPeerNoEx(peer_id);
1509 LOG(dout_con<<m_connection->getDesc()
1510 <<" INFO: dropped packet for non existent peer_id: "
1511 << peer_id << std::endl);
1512 FATAL_ERROR_IF(!reliable, "Trying to send raw packet reliable but no peer found!");
1515 Channel *channel = &(dynamic_cast<UDPPeer*>(&peer)->channels[channelnum]);
1519 bool have_sequence_number_for_raw_packet = true;
1521 channel->getOutgoingSequenceNumber(have_sequence_number_for_raw_packet);
1523 if (!have_sequence_number_for_raw_packet)
1526 SharedBuffer<u8> reliable = makeReliablePacket(data, seqnum);
1527 Address peer_address;
1528 peer->getAddress(MTP_MINETEST_RELIABLE_UDP, peer_address);
1530 // Add base headers and make a packet
1531 BufferedPacket p = con::makePacket(peer_address, reliable,
1532 m_connection->GetProtocolID(), m_connection->GetPeerID(),
1535 // first check if our send window is already maxed out
1536 if (channel->outgoing_reliables_sent.size()
1537 < channel->getWindowSize()) {
1538 LOG(dout_con<<m_connection->getDesc()
1539 <<" INFO: sending a reliable packet to peer_id " << peer_id
1540 <<" channel: " << channelnum
1541 <<" seqnum: " << seqnum << std::endl);
1542 sendAsPacketReliable(p,channel);
1546 LOG(dout_con<<m_connection->getDesc()
1547 <<" INFO: queueing reliable packet for peer_id: " << peer_id
1548 <<" channel: " << channelnum
1549 <<" seqnum: " << seqnum << std::endl);
1550 channel->queued_reliables.push(p);
1556 Address peer_address;
1558 if (peer->getAddress(MTP_UDP, peer_address))
1560 // Add base headers and make a packet
1561 BufferedPacket p = con::makePacket(peer_address, data,
1562 m_connection->GetProtocolID(), m_connection->GetPeerID(),
1570 LOG(dout_con<<m_connection->getDesc()
1571 <<" INFO: dropped unreliable packet for peer_id: " << peer_id
1572 <<" because of (yet) missing udp address" << std::endl);
1581 void ConnectionSendThread::processReliableCommand(ConnectionCommand &c)
1583 assert(c.reliable); // Pre-condition
1587 LOG(dout_con<<m_connection->getDesc()
1588 <<"UDP processing reliable CONNCMD_NONE"<<std::endl);
1592 LOG(dout_con<<m_connection->getDesc()
1593 <<"UDP processing reliable CONNCMD_SEND"<<std::endl);
1597 case CONNCMD_SEND_TO_ALL:
1598 LOG(dout_con<<m_connection->getDesc()
1599 <<"UDP processing CONNCMD_SEND_TO_ALL"<<std::endl);
1600 sendToAllReliable(c);
1603 case CONCMD_CREATE_PEER:
1604 LOG(dout_con<<m_connection->getDesc()
1605 <<"UDP processing reliable CONCMD_CREATE_PEER"<<std::endl);
1606 if (!rawSendAsPacket(c.peer_id,c.channelnum,c.data,c.reliable))
1608 /* put to queue if we couldn't send it immediately */
1613 case CONCMD_DISABLE_LEGACY:
1614 LOG(dout_con<<m_connection->getDesc()
1615 <<"UDP processing reliable CONCMD_DISABLE_LEGACY"<<std::endl);
1616 if (!rawSendAsPacket(c.peer_id,c.channelnum,c.data,c.reliable))
1618 /* put to queue if we couldn't send it immediately */
1624 case CONNCMD_CONNECT:
1625 case CONNCMD_DISCONNECT:
1627 FATAL_ERROR("Got command that shouldn't be reliable as reliable command");
1629 LOG(dout_con<<m_connection->getDesc()
1630 <<" Invalid reliable command type: " << c.type <<std::endl);
1635 void ConnectionSendThread::processNonReliableCommand(ConnectionCommand &c)
1637 assert(!c.reliable); // Pre-condition
1641 LOG(dout_con<<m_connection->getDesc()
1642 <<" UDP processing CONNCMD_NONE"<<std::endl);
1645 LOG(dout_con<<m_connection->getDesc()
1646 <<" UDP processing CONNCMD_SERVE port="
1647 <<c.address.serializeString()<<std::endl);
1650 case CONNCMD_CONNECT:
1651 LOG(dout_con<<m_connection->getDesc()
1652 <<" UDP processing CONNCMD_CONNECT"<<std::endl);
1655 case CONNCMD_DISCONNECT:
1656 LOG(dout_con<<m_connection->getDesc()
1657 <<" UDP processing CONNCMD_DISCONNECT"<<std::endl);
1660 case CONNCMD_DISCONNECT_PEER:
1661 LOG(dout_con<<m_connection->getDesc()
1662 <<" UDP processing CONNCMD_DISCONNECT_PEER"<<std::endl);
1663 disconnect_peer(c.peer_id);
1666 LOG(dout_con<<m_connection->getDesc()
1667 <<" UDP processing CONNCMD_SEND"<<std::endl);
1668 send(c.peer_id, c.channelnum, c.data);
1670 case CONNCMD_SEND_TO_ALL:
1671 LOG(dout_con<<m_connection->getDesc()
1672 <<" UDP processing CONNCMD_SEND_TO_ALL"<<std::endl);
1673 sendToAll(c.channelnum, c.data);
1676 LOG(dout_con<<m_connection->getDesc()
1677 <<" UDP processing CONCMD_ACK"<<std::endl);
1678 sendAsPacket(c.peer_id,c.channelnum,c.data,true);
1680 case CONCMD_CREATE_PEER:
1681 FATAL_ERROR("Got command that should be reliable as unreliable command");
1683 LOG(dout_con<<m_connection->getDesc()
1684 <<" Invalid command type: " << c.type <<std::endl);
1688 void ConnectionSendThread::serve(Address bind_address)
1690 LOG(dout_con<<m_connection->getDesc()
1691 <<"UDP serving at port " << bind_address.serializeString() <<std::endl);
1693 m_connection->m_udpSocket.Bind(bind_address);
1694 m_connection->SetPeerID(PEER_ID_SERVER);
1696 catch(SocketException &e) {
1700 m_connection->putEvent(ce);
1704 void ConnectionSendThread::connect(Address address)
1706 LOG(dout_con<<m_connection->getDesc()<<" connecting to "<<address.serializeString()
1707 <<":"<<address.getPort()<<std::endl);
1709 UDPPeer *peer = m_connection->createServerPeer(address);
1713 e.peerAdded(peer->id, peer->address);
1714 m_connection->putEvent(e);
1718 if (address.isIPv6())
1719 bind_addr.setAddress((IPv6AddressBytes*) NULL);
1721 bind_addr.setAddress(0,0,0,0);
1723 m_connection->m_udpSocket.Bind(bind_addr);
1725 // Send a dummy packet to server with peer_id = PEER_ID_INEXISTENT
1726 m_connection->SetPeerID(PEER_ID_INEXISTENT);
1727 NetworkPacket pkt(0,0);
1728 m_connection->Send(PEER_ID_SERVER, 0, &pkt, true);
1731 void ConnectionSendThread::disconnect()
1733 LOG(dout_con<<m_connection->getDesc()<<" disconnecting"<<std::endl);
1735 // Create and send DISCO packet
1736 SharedBuffer<u8> data(2);
1737 writeU8(&data[0], TYPE_CONTROL);
1738 writeU8(&data[1], CONTROLTYPE_DISCO);
1742 std::list<u16> peerids = m_connection->getPeerIDs();
1744 for (std::list<u16>::iterator i = peerids.begin();
1748 sendAsPacket(*i, 0,data,false);
1752 void ConnectionSendThread::disconnect_peer(u16 peer_id)
1754 LOG(dout_con<<m_connection->getDesc()<<" disconnecting peer"<<std::endl);
1756 // Create and send DISCO packet
1757 SharedBuffer<u8> data(2);
1758 writeU8(&data[0], TYPE_CONTROL);
1759 writeU8(&data[1], CONTROLTYPE_DISCO);
1760 sendAsPacket(peer_id, 0,data,false);
1762 PeerHelper peer = m_connection->getPeerNoEx(peer_id);
1767 if (dynamic_cast<UDPPeer*>(&peer) == 0)
1772 dynamic_cast<UDPPeer*>(&peer)->m_pending_disconnect = true;
1775 void ConnectionSendThread::send(u16 peer_id, u8 channelnum,
1776 SharedBuffer<u8> data)
1778 assert(channelnum < CHANNEL_COUNT); // Pre-condition
1780 PeerHelper peer = m_connection->getPeerNoEx(peer_id);
1783 LOG(dout_con<<m_connection->getDesc()<<" peer: peer_id="<<peer_id
1784 << ">>>NOT<<< found on sending packet"
1785 << ", channel " << (channelnum % 0xFF)
1786 << ", size: " << data.getSize() <<std::endl);
1790 LOG(dout_con<<m_connection->getDesc()<<" sending to peer_id="<<peer_id
1791 << ", channel " << (channelnum % 0xFF)
1792 << ", size: " << data.getSize() <<std::endl);
1794 u16 split_sequence_number = peer->getNextSplitSequenceNumber(channelnum);
1796 u32 chunksize_max = m_max_packet_size - BASE_HEADER_SIZE;
1797 std::list<SharedBuffer<u8> > originals;
1799 originals = makeAutoSplitPacket(data, chunksize_max,split_sequence_number);
1801 peer->setNextSplitSequenceNumber(channelnum,split_sequence_number);
1803 for(std::list<SharedBuffer<u8> >::iterator i = originals.begin();
1804 i != originals.end(); ++i)
1806 SharedBuffer<u8> original = *i;
1807 sendAsPacket(peer_id, channelnum, original);
1811 void ConnectionSendThread::sendReliable(ConnectionCommand &c)
1813 PeerHelper peer = m_connection->getPeerNoEx(c.peer_id);
1817 peer->PutReliableSendCommand(c,m_max_packet_size);
1820 void ConnectionSendThread::sendToAll(u8 channelnum, SharedBuffer<u8> data)
1822 std::list<u16> peerids = m_connection->getPeerIDs();
1824 for (std::list<u16>::iterator i = peerids.begin();
1828 send(*i, channelnum, data);
1832 void ConnectionSendThread::sendToAllReliable(ConnectionCommand &c)
1834 std::list<u16> peerids = m_connection->getPeerIDs();
1836 for (std::list<u16>::iterator i = peerids.begin();
1840 PeerHelper peer = m_connection->getPeerNoEx(*i);
1845 peer->PutReliableSendCommand(c,m_max_packet_size);
1849 void ConnectionSendThread::sendPackets(float dtime)
1851 std::list<u16> peerIds = m_connection->getPeerIDs();
1852 std::list<u16> pendingDisconnect;
1853 std::map<u16,bool> pending_unreliable;
1855 for(std::list<u16>::iterator
1856 j = peerIds.begin();
1857 j != peerIds.end(); ++j)
1859 PeerHelper peer = m_connection->getPeerNoEx(*j);
1860 //peer may have been removed
1862 LOG(dout_con<<m_connection->getDesc()<< " Peer not found: peer_id=" << *j << std::endl);
1865 peer->m_increment_packets_remaining = m_iteration_packets_avaialble/m_connection->m_peers.size();
1867 if (dynamic_cast<UDPPeer*>(&peer) == 0)
1872 if (dynamic_cast<UDPPeer*>(&peer)->m_pending_disconnect)
1874 pendingDisconnect.push_back(*j);
1877 PROFILE(std::stringstream peerIdentifier);
1878 PROFILE(peerIdentifier << "sendPackets[" << m_connection->getDesc() << ";" << *j << ";RELIABLE]");
1879 PROFILE(ScopeProfiler peerprofiler(g_profiler, peerIdentifier.str(), SPT_AVG));
1881 LOG(dout_con<<m_connection->getDesc()
1882 << " Handle per peer queues: peer_id=" << *j
1883 << " packet quota: " << peer->m_increment_packets_remaining << std::endl);
1884 // first send queued reliable packets for all peers (if possible)
1885 for (unsigned int i=0; i < CHANNEL_COUNT; i++)
1887 u16 next_to_ack = 0;
1888 dynamic_cast<UDPPeer*>(&peer)->channels[i].outgoing_reliables_sent.getFirstSeqnum(next_to_ack);
1889 u16 next_to_receive = 0;
1890 dynamic_cast<UDPPeer*>(&peer)->channels[i].incoming_reliables.getFirstSeqnum(next_to_receive);
1892 LOG(dout_con<<m_connection->getDesc()<< "\t channel: "
1893 << i << ", peer quota:"
1894 << peer->m_increment_packets_remaining
1896 << "\t\t\treliables on wire: "
1897 << dynamic_cast<UDPPeer*>(&peer)->channels[i].outgoing_reliables_sent.size()
1898 << ", waiting for ack for " << next_to_ack
1900 << "\t\t\tincoming_reliables: "
1901 << dynamic_cast<UDPPeer*>(&peer)->channels[i].incoming_reliables.size()
1902 << ", next reliable packet: "
1903 << dynamic_cast<UDPPeer*>(&peer)->channels[i].readNextIncomingSeqNum()
1904 << ", next queued: " << next_to_receive
1906 << "\t\t\treliables queued : "
1907 << dynamic_cast<UDPPeer*>(&peer)->channels[i].queued_reliables.size()
1909 << "\t\t\tqueued commands : "
1910 << dynamic_cast<UDPPeer*>(&peer)->channels[i].queued_commands.size()
1913 while ((dynamic_cast<UDPPeer*>(&peer)->channels[i].queued_reliables.size() > 0) &&
1914 (dynamic_cast<UDPPeer*>(&peer)->channels[i].outgoing_reliables_sent.size()
1915 < dynamic_cast<UDPPeer*>(&peer)->channels[i].getWindowSize())&&
1916 (peer->m_increment_packets_remaining > 0))
1918 BufferedPacket p = dynamic_cast<UDPPeer*>(&peer)->channels[i].queued_reliables.front();
1919 dynamic_cast<UDPPeer*>(&peer)->channels[i].queued_reliables.pop();
1920 Channel* channel = &(dynamic_cast<UDPPeer*>(&peer)->channels[i]);
1921 LOG(dout_con<<m_connection->getDesc()
1922 <<" INFO: sending a queued reliable packet "
1924 <<", seqnum: " << readU16(&p.data[BASE_HEADER_SIZE+1])
1926 sendAsPacketReliable(p,channel);
1927 peer->m_increment_packets_remaining--;
1932 if (m_outgoing_queue.size())
1934 LOG(dout_con<<m_connection->getDesc()
1935 << " Handle non reliable queue ("
1936 << m_outgoing_queue.size() << " pkts)" << std::endl);
1939 unsigned int initial_queuesize = m_outgoing_queue.size();
1940 /* send non reliable packets*/
1941 for(unsigned int i=0;i < initial_queuesize;i++) {
1942 OutgoingPacket packet = m_outgoing_queue.front();
1943 m_outgoing_queue.pop();
1945 if (packet.reliable)
1948 PeerHelper peer = m_connection->getPeerNoEx(packet.peer_id);
1950 LOG(dout_con<<m_connection->getDesc()
1951 <<" Outgoing queue: peer_id="<<packet.peer_id
1952 << ">>>NOT<<< found on sending packet"
1953 << ", channel " << (packet.channelnum % 0xFF)
1954 << ", size: " << packet.data.getSize() <<std::endl);
1957 /* send acks immediately */
1958 else if (packet.ack)
1960 rawSendAsPacket(packet.peer_id, packet.channelnum,
1961 packet.data, packet.reliable);
1962 peer->m_increment_packets_remaining =
1963 MYMIN(0,peer->m_increment_packets_remaining--);
1966 ( peer->m_increment_packets_remaining > 0) ||
1967 (StopRequested())) {
1968 rawSendAsPacket(packet.peer_id, packet.channelnum,
1969 packet.data, packet.reliable);
1970 peer->m_increment_packets_remaining--;
1973 m_outgoing_queue.push(packet);
1974 pending_unreliable[packet.peer_id] = true;
1978 for(std::list<u16>::iterator
1979 k = pendingDisconnect.begin();
1980 k != pendingDisconnect.end(); ++k)
1982 if (!pending_unreliable[*k])
1984 m_connection->deletePeer(*k,false);
1989 void ConnectionSendThread::sendAsPacket(u16 peer_id, u8 channelnum,
1990 SharedBuffer<u8> data, bool ack)
1992 OutgoingPacket packet(peer_id, channelnum, data, false, ack);
1993 m_outgoing_queue.push(packet);
1996 ConnectionReceiveThread::ConnectionReceiveThread(unsigned int max_packet_size) :
2001 void * ConnectionReceiveThread::Thread()
2003 assert(m_connection != NULL);
2005 log_register_thread("ConnectionReceive");
2007 LOG(dout_con<<m_connection->getDesc()
2008 <<"ConnectionReceive thread started"<<std::endl);
2010 PROFILE(std::stringstream ThreadIdentifier);
2011 PROFILE(ThreadIdentifier << "ConnectionReceive: [" << m_connection->getDesc() << "]");
2013 porting::setThreadName("ConnectionReceive");
2015 #ifdef DEBUG_CONNECTION_KBPS
2016 u32 curtime = porting::getTimeMs();
2017 u32 lasttime = curtime;
2018 float debug_print_timer = 0.0;
2021 while(!StopRequested()) {
2022 BEGIN_DEBUG_EXCEPTION_HANDLER
2023 PROFILE(ScopeProfiler sp(g_profiler, ThreadIdentifier.str(), SPT_AVG));
2025 #ifdef DEBUG_CONNECTION_KBPS
2027 curtime = porting::getTimeMs();
2028 float dtime = CALC_DTIME(lasttime,curtime);
2031 /* receive packets */
2034 #ifdef DEBUG_CONNECTION_KBPS
2035 debug_print_timer += dtime;
2036 if (debug_print_timer > 20.0) {
2037 debug_print_timer -= 20.0;
2039 std::list<u16> peerids = m_connection->getPeerIDs();
2041 for (std::list<u16>::iterator i = peerids.begin();
2045 PeerHelper peer = m_connection->getPeerNoEx(*i);
2049 float peer_current = 0.0;
2050 float peer_loss = 0.0;
2051 float avg_rate = 0.0;
2052 float avg_loss = 0.0;
2054 for(u16 j=0; j<CHANNEL_COUNT; j++)
2056 peer_current +=peer->channels[j].getCurrentDownloadRateKB();
2057 peer_loss += peer->channels[j].getCurrentLossRateKB();
2058 avg_rate += peer->channels[j].getAvgDownloadRateKB();
2059 avg_loss += peer->channels[j].getAvgLossRateKB();
2062 std::stringstream output;
2063 output << std::fixed << std::setprecision(1);
2064 output << "OUT to Peer " << *i << " RATES (good / loss) " << std::endl;
2065 output << "\tcurrent (sum): " << peer_current << "kb/s "<< peer_loss << "kb/s" << std::endl;
2066 output << "\taverage (sum): " << avg_rate << "kb/s "<< avg_loss << "kb/s" << std::endl;
2067 output << std::setfill(' ');
2068 for(u16 j=0; j<CHANNEL_COUNT; j++)
2070 output << "\tcha " << j << ":"
2071 << " CUR: " << std::setw(6) << peer->channels[j].getCurrentDownloadRateKB() <<"kb/s"
2072 << " AVG: " << std::setw(6) << peer->channels[j].getAvgDownloadRateKB() <<"kb/s"
2073 << " MAX: " << std::setw(6) << peer->channels[j].getMaxDownloadRateKB() <<"kb/s"
2075 << " CUR: " << std::setw(6) << peer->channels[j].getCurrentLossRateKB() <<"kb/s"
2076 << " AVG: " << std::setw(6) << peer->channels[j].getAvgLossRateKB() <<"kb/s"
2077 << " MAX: " << std::setw(6) << peer->channels[j].getMaxLossRateKB() <<"kb/s"
2078 << " / WS: " << peer->channels[j].getWindowSize()
2082 fprintf(stderr,"%s\n",output.str().c_str());
2086 END_DEBUG_EXCEPTION_HANDLER(errorstream);
2088 PROFILE(g_profiler->remove(ThreadIdentifier.str()));
2092 // Receive packets from the network and buffers and create ConnectionEvents
2093 void ConnectionReceiveThread::receive()
2095 // use IPv6 minimum allowed MTU as receive buffer size as this is
2096 // theoretical reliable upper boundary of a udp packet for all IPv6 enabled
2098 unsigned int packet_maxsize = 1500;
2099 SharedBuffer<u8> packetdata(packet_maxsize);
2101 bool packet_queued = true;
2103 unsigned int loop_count = 0;
2105 /* first of all read packets from socket */
2106 /* check for incoming data available */
2107 while( (loop_count < 10) &&
2108 (m_connection->m_udpSocket.WaitData(50))) {
2111 if (packet_queued) {
2112 bool data_left = true;
2114 SharedBuffer<u8> resultdata;
2117 data_left = getFromBuffers(peer_id, resultdata);
2120 e.dataReceived(peer_id, resultdata);
2121 m_connection->putEvent(e);
2124 catch(ProcessedSilentlyException &e) {
2125 /* try reading again */
2128 packet_queued = false;
2132 s32 received_size = m_connection->m_udpSocket.Receive(sender, *packetdata, packet_maxsize);
2134 if ((received_size < BASE_HEADER_SIZE) ||
2135 (readU32(&packetdata[0]) != m_connection->GetProtocolID()))
2137 LOG(derr_con<<m_connection->getDesc()
2138 <<"Receive(): Invalid incoming packet, "
2139 <<"size: " << received_size
2141 << ((received_size >= 4) ? readU32(&packetdata[0]) : -1)
2146 u16 peer_id = readPeerId(*packetdata);
2147 u8 channelnum = readChannel(*packetdata);
2149 if (channelnum > CHANNEL_COUNT-1) {
2150 LOG(derr_con<<m_connection->getDesc()
2151 <<"Receive(): Invalid channel "<<channelnum<<std::endl);
2152 throw InvalidIncomingDataException("Channel doesn't exist");
2155 /* preserve original peer_id for later usage */
2156 u16 packet_peer_id = peer_id;
2158 /* Try to identify peer by sender address (may happen on join) */
2159 if (peer_id == PEER_ID_INEXISTENT) {
2160 peer_id = m_connection->lookupPeer(sender);
2163 /* The peer was not found in our lists. Add it. */
2164 if (peer_id == PEER_ID_INEXISTENT) {
2165 peer_id = m_connection->createPeer(sender, MTP_MINETEST_RELIABLE_UDP, 0);
2168 PeerHelper peer = m_connection->getPeerNoEx(peer_id);
2171 LOG(dout_con<<m_connection->getDesc()
2172 <<" got packet from unknown peer_id: "
2173 <<peer_id<<" Ignoring."<<std::endl);
2177 // Validate peer address
2179 Address peer_address;
2181 if (peer->getAddress(MTP_UDP, peer_address)) {
2182 if (peer_address != sender) {
2183 LOG(derr_con<<m_connection->getDesc()
2184 <<m_connection->getDesc()
2185 <<" Peer "<<peer_id<<" sending from different address."
2186 " Ignoring."<<std::endl);
2192 bool invalid_address = true;
2193 if (invalid_address) {
2194 LOG(derr_con<<m_connection->getDesc()
2195 <<m_connection->getDesc()
2196 <<" Peer "<<peer_id<<" unknown."
2197 " Ignoring."<<std::endl);
2203 /* mark peer as seen with id */
2204 if (!(packet_peer_id == PEER_ID_INEXISTENT))
2205 peer->setSentWithID();
2207 peer->ResetTimeout();
2209 Channel *channel = 0;
2211 if (dynamic_cast<UDPPeer*>(&peer) != 0)
2213 channel = &(dynamic_cast<UDPPeer*>(&peer)->channels[channelnum]);
2217 channel->UpdateBytesReceived(received_size);
2220 // Throw the received packet to channel->processPacket()
2222 // Make a new SharedBuffer from the data without the base headers
2223 SharedBuffer<u8> strippeddata(received_size - BASE_HEADER_SIZE);
2224 memcpy(*strippeddata, &packetdata[BASE_HEADER_SIZE],
2225 strippeddata.getSize());
2228 // Process it (the result is some data with no headers made by us)
2229 SharedBuffer<u8> resultdata = processPacket
2230 (channel, strippeddata, peer_id, channelnum, false);
2232 LOG(dout_con<<m_connection->getDesc()
2233 <<" ProcessPacket from peer_id: " << peer_id
2234 << ",channel: " << (channelnum & 0xFF) << ", returned "
2235 << resultdata.getSize() << " bytes" <<std::endl);
2238 e.dataReceived(peer_id, resultdata);
2239 m_connection->putEvent(e);
2241 catch(ProcessedSilentlyException &e) {
2243 catch(ProcessedQueued &e) {
2244 packet_queued = true;
2247 catch(InvalidIncomingDataException &e) {
2249 catch(ProcessedSilentlyException &e) {
2254 bool ConnectionReceiveThread::getFromBuffers(u16 &peer_id, SharedBuffer<u8> &dst)
2256 std::list<u16> peerids = m_connection->getPeerIDs();
2258 for(std::list<u16>::iterator j = peerids.begin();
2259 j != peerids.end(); ++j)
2261 PeerHelper peer = m_connection->getPeerNoEx(*j);
2265 if (dynamic_cast<UDPPeer*>(&peer) == 0)
2268 for(u16 i=0; i<CHANNEL_COUNT; i++)
2270 Channel *channel = &(dynamic_cast<UDPPeer*>(&peer))->channels[i];
2272 if (checkIncomingBuffers(channel, peer_id, dst)) {
2280 bool ConnectionReceiveThread::checkIncomingBuffers(Channel *channel,
2281 u16 &peer_id, SharedBuffer<u8> &dst)
2283 u16 firstseqnum = 0;
2284 if (channel->incoming_reliables.getFirstSeqnum(firstseqnum))
2286 if (firstseqnum == channel->readNextIncomingSeqNum())
2288 BufferedPacket p = channel->incoming_reliables.popFirst();
2289 peer_id = readPeerId(*p.data);
2290 u8 channelnum = readChannel(*p.data);
2291 u16 seqnum = readU16(&p.data[BASE_HEADER_SIZE+1]);
2293 LOG(dout_con<<m_connection->getDesc()
2294 <<"UNBUFFERING TYPE_RELIABLE"
2295 <<" seqnum="<<seqnum
2296 <<" peer_id="<<peer_id
2297 <<" channel="<<((int)channelnum&0xff)
2300 channel->incNextIncomingSeqNum();
2302 u32 headers_size = BASE_HEADER_SIZE + RELIABLE_HEADER_SIZE;
2303 // Get out the inside packet and re-process it
2304 SharedBuffer<u8> payload(p.data.getSize() - headers_size);
2305 memcpy(*payload, &p.data[headers_size], payload.getSize());
2307 dst = processPacket(channel, payload, peer_id, channelnum, true);
2314 SharedBuffer<u8> ConnectionReceiveThread::processPacket(Channel *channel,
2315 SharedBuffer<u8> packetdata, u16 peer_id, u8 channelnum, bool reliable)
2317 PeerHelper peer = m_connection->getPeerNoEx(peer_id);
2320 errorstream << "Peer not found (possible timeout)" << std::endl;
2321 throw ProcessedSilentlyException("Peer not found (possible timeout)");
2324 if (packetdata.getSize() < 1)
2325 throw InvalidIncomingDataException("packetdata.getSize() < 1");
2327 u8 type = readU8(&(packetdata[0]));
2329 if (MAX_UDP_PEERS <= 65535 && peer_id >= MAX_UDP_PEERS) {
2330 errorstream << "Something is wrong with peer_id" << std::endl;
2334 if (type == TYPE_CONTROL)
2336 if (packetdata.getSize() < 2)
2337 throw InvalidIncomingDataException("packetdata.getSize() < 2");
2339 u8 controltype = readU8(&(packetdata[1]));
2341 if (controltype == CONTROLTYPE_ACK)
2343 FATAL_ERROR_IF(channel == 0, "Invalid channel (0)");
2344 if (packetdata.getSize() < 4)
2345 throw InvalidIncomingDataException
2346 ("packetdata.getSize() < 4 (ACK header size)");
2348 u16 seqnum = readU16(&packetdata[2]);
2349 LOG(dout_con<<m_connection->getDesc()
2350 <<" [ CONTROLTYPE_ACK: channelnum="
2351 <<((int)channelnum&0xff)<<", peer_id="<<peer_id
2352 <<", seqnum="<<seqnum<< " ]"<<std::endl);
2356 channel->outgoing_reliables_sent.popSeqnum(seqnum);
2358 // only calculate rtt from straight sent packets
2359 if (p.resend_count == 0) {
2360 // Get round trip time
2361 unsigned int current_time = porting::getTimeMs();
2363 // a overflow is quite unlikely but as it'd result in major
2364 // rtt miscalculation we handle it here
2365 if (current_time > p.absolute_send_time)
2367 float rtt = (current_time - p.absolute_send_time) / 1000.0;
2369 // Let peer calculate stuff according to it
2370 // (avg_rtt and resend_timeout)
2371 dynamic_cast<UDPPeer*>(&peer)->reportRTT(rtt);
2373 else if (p.totaltime > 0)
2375 float rtt = p.totaltime;
2377 // Let peer calculate stuff according to it
2378 // (avg_rtt and resend_timeout)
2379 dynamic_cast<UDPPeer*>(&peer)->reportRTT(rtt);
2382 //put bytes for max bandwidth calculation
2383 channel->UpdateBytesSent(p.data.getSize(),1);
2384 if (channel->outgoing_reliables_sent.size() == 0)
2386 m_connection->TriggerSend();
2389 catch(NotFoundException &e) {
2390 LOG(derr_con<<m_connection->getDesc()
2391 <<"WARNING: ACKed packet not "
2394 channel->UpdatePacketTooLateCounter();
2396 throw ProcessedSilentlyException("Got an ACK");
2398 else if (controltype == CONTROLTYPE_SET_PEER_ID) {
2399 // Got a packet to set our peer id
2400 if (packetdata.getSize() < 4)
2401 throw InvalidIncomingDataException
2402 ("packetdata.getSize() < 4 (SET_PEER_ID header size)");
2403 u16 peer_id_new = readU16(&packetdata[2]);
2404 LOG(dout_con<<m_connection->getDesc()
2405 <<"Got new peer id: "<<peer_id_new<<"... "<<std::endl);
2407 if (m_connection->GetPeerID() != PEER_ID_INEXISTENT)
2409 LOG(derr_con<<m_connection->getDesc()
2410 <<"WARNING: Not changing"
2411 " existing peer id."<<std::endl);
2415 LOG(dout_con<<m_connection->getDesc()<<"changing own peer id"<<std::endl);
2416 m_connection->SetPeerID(peer_id_new);
2419 ConnectionCommand cmd;
2421 SharedBuffer<u8> reply(2);
2422 writeU8(&reply[0], TYPE_CONTROL);
2423 writeU8(&reply[1], CONTROLTYPE_ENABLE_BIG_SEND_WINDOW);
2424 cmd.disableLegacy(PEER_ID_SERVER,reply);
2425 m_connection->putCommand(cmd);
2427 throw ProcessedSilentlyException("Got a SET_PEER_ID");
2429 else if (controltype == CONTROLTYPE_PING)
2431 // Just ignore it, the incoming data already reset
2432 // the timeout counter
2433 LOG(dout_con<<m_connection->getDesc()<<"PING"<<std::endl);
2434 throw ProcessedSilentlyException("Got a PING");
2436 else if (controltype == CONTROLTYPE_DISCO)
2438 // Just ignore it, the incoming data already reset
2439 // the timeout counter
2440 LOG(dout_con<<m_connection->getDesc()
2441 <<"DISCO: Removing peer "<<(peer_id)<<std::endl);
2443 if (m_connection->deletePeer(peer_id, false) == false)
2445 derr_con<<m_connection->getDesc()
2446 <<"DISCO: Peer not found"<<std::endl;
2449 throw ProcessedSilentlyException("Got a DISCO");
2451 else if (controltype == CONTROLTYPE_ENABLE_BIG_SEND_WINDOW)
2453 dynamic_cast<UDPPeer*>(&peer)->setNonLegacyPeer();
2454 throw ProcessedSilentlyException("Got non legacy control");
2457 LOG(derr_con<<m_connection->getDesc()
2458 <<"INVALID TYPE_CONTROL: invalid controltype="
2459 <<((int)controltype&0xff)<<std::endl);
2460 throw InvalidIncomingDataException("Invalid control type");
2463 else if (type == TYPE_ORIGINAL)
2465 if (packetdata.getSize() <= ORIGINAL_HEADER_SIZE)
2466 throw InvalidIncomingDataException
2467 ("packetdata.getSize() <= ORIGINAL_HEADER_SIZE");
2468 LOG(dout_con<<m_connection->getDesc()
2469 <<"RETURNING TYPE_ORIGINAL to user"
2471 // Get the inside packet out and return it
2472 SharedBuffer<u8> payload(packetdata.getSize() - ORIGINAL_HEADER_SIZE);
2473 memcpy(*payload, &(packetdata[ORIGINAL_HEADER_SIZE]), payload.getSize());
2476 else if (type == TYPE_SPLIT)
2478 Address peer_address;
2480 if (peer->getAddress(MTP_UDP, peer_address)) {
2482 // We have to create a packet again for buffering
2483 // This isn't actually too bad an idea.
2484 BufferedPacket packet = makePacket(
2487 m_connection->GetProtocolID(),
2491 // Buffer the packet
2492 SharedBuffer<u8> data =
2493 peer->addSpiltPacket(channelnum,packet,reliable);
2495 if (data.getSize() != 0)
2497 LOG(dout_con<<m_connection->getDesc()
2498 <<"RETURNING TYPE_SPLIT: Constructed full data, "
2499 <<"size="<<data.getSize()<<std::endl);
2502 LOG(dout_con<<m_connection->getDesc()<<"BUFFERED TYPE_SPLIT"<<std::endl);
2503 throw ProcessedSilentlyException("Buffered a split packet chunk");
2506 //TODO throw some error
2509 else if (type == TYPE_RELIABLE)
2511 FATAL_ERROR_IF(channel == 0, "Invalid channel (0)");
2512 // Recursive reliable packets not allowed
2514 throw InvalidIncomingDataException("Found nested reliable packets");
2516 if (packetdata.getSize() < RELIABLE_HEADER_SIZE)
2517 throw InvalidIncomingDataException
2518 ("packetdata.getSize() < RELIABLE_HEADER_SIZE");
2520 u16 seqnum = readU16(&packetdata[1]);
2521 bool is_future_packet = false;
2522 bool is_old_packet = false;
2524 /* packet is within our receive window send ack */
2525 if (seqnum_in_window(seqnum, channel->readNextIncomingSeqNum(),MAX_RELIABLE_WINDOW_SIZE))
2527 m_connection->sendAck(peer_id,channelnum,seqnum);
2530 is_future_packet = seqnum_higher(seqnum, channel->readNextIncomingSeqNum());
2531 is_old_packet = seqnum_higher(channel->readNextIncomingSeqNum(), seqnum);
2534 /* packet is not within receive window, don't send ack. *
2535 * if this was a valid packet it's gonna be retransmitted */
2536 if (is_future_packet)
2538 throw ProcessedSilentlyException("Received packet newer then expected, not sending ack");
2541 /* seems like our ack was lost, send another one for a old packet */
2544 LOG(dout_con<<m_connection->getDesc()
2545 << "RE-SENDING ACK: peer_id: " << peer_id
2546 << ", channel: " << (channelnum&0xFF)
2547 << ", seqnum: " << seqnum << std::endl;)
2548 m_connection->sendAck(peer_id,channelnum,seqnum);
2550 // we already have this packet so this one was on wire at least
2551 // the current timeout
2552 // we don't know how long this packet was on wire don't do silly guessing
2553 // dynamic_cast<UDPPeer*>(&peer)->reportRTT(dynamic_cast<UDPPeer*>(&peer)->getResendTimeout());
2555 throw ProcessedSilentlyException("Retransmitting ack for old packet");
2559 if (seqnum != channel->readNextIncomingSeqNum())
2561 Address peer_address;
2563 // this is a reliable packet so we have a udp address for sure
2564 peer->getAddress(MTP_MINETEST_RELIABLE_UDP, peer_address);
2565 // This one comes later, buffer it.
2566 // Actually we have to make a packet to buffer one.
2567 // Well, we have all the ingredients, so just do it.
2568 BufferedPacket packet = con::makePacket(
2571 m_connection->GetProtocolID(),
2575 channel->incoming_reliables.insert(packet,channel->readNextIncomingSeqNum());
2577 LOG(dout_con<<m_connection->getDesc()
2578 << "BUFFERING, TYPE_RELIABLE peer_id: " << peer_id
2579 << ", channel: " << (channelnum&0xFF)
2580 << ", seqnum: " << seqnum << std::endl;)
2582 throw ProcessedQueued("Buffered future reliable packet");
2584 catch(AlreadyExistsException &e)
2587 catch(IncomingDataCorruption &e)
2589 ConnectionCommand discon;
2590 discon.disconnect_peer(peer_id);
2591 m_connection->putCommand(discon);
2593 LOG(derr_con<<m_connection->getDesc()
2594 << "INVALID, TYPE_RELIABLE peer_id: " << peer_id
2595 << ", channel: " << (channelnum&0xFF)
2596 << ", seqnum: " << seqnum
2597 << "DROPPING CLIENT!" << std::endl;)
2601 /* we got a packet to process right now */
2602 LOG(dout_con<<m_connection->getDesc()
2603 << "RECURSIVE, TYPE_RELIABLE peer_id: " << peer_id
2604 << ", channel: " << (channelnum&0xFF)
2605 << ", seqnum: " << seqnum << std::endl;)
2608 /* check for resend case */
2609 u16 queued_seqnum = 0;
2610 if (channel->incoming_reliables.getFirstSeqnum(queued_seqnum))
2612 if (queued_seqnum == seqnum)
2614 BufferedPacket queued_packet = channel->incoming_reliables.popFirst();
2615 /** TODO find a way to verify the new against the old packet */
2619 channel->incNextIncomingSeqNum();
2621 // Get out the inside packet and re-process it
2622 SharedBuffer<u8> payload(packetdata.getSize() - RELIABLE_HEADER_SIZE);
2623 memcpy(*payload, &packetdata[RELIABLE_HEADER_SIZE], payload.getSize());
2625 return processPacket(channel, payload, peer_id, channelnum, true);
2629 derr_con<<m_connection->getDesc()
2630 <<"Got invalid type="<<((int)type&0xff)<<std::endl;
2631 throw InvalidIncomingDataException("Invalid packet type");
2634 // We should never get here.
2635 FATAL_ERROR("Invalid execution point");
2642 Connection::Connection(u32 protocol_id, u32 max_packet_size, float timeout,
2648 m_protocol_id(protocol_id),
2649 m_sendThread(max_packet_size, timeout),
2650 m_receiveThread(max_packet_size),
2652 m_bc_peerhandler(0),
2653 m_bc_receive_timeout(0),
2654 m_shutting_down(false),
2655 m_next_remote_peer_id(2)
2657 m_udpSocket.setTimeoutMs(5);
2659 m_sendThread.setParent(this);
2660 m_receiveThread.setParent(this);
2662 m_sendThread.Start();
2663 m_receiveThread.Start();
2666 Connection::Connection(u32 protocol_id, u32 max_packet_size, float timeout,
2667 bool ipv6, PeerHandler *peerhandler) :
2672 m_protocol_id(protocol_id),
2673 m_sendThread(max_packet_size, timeout),
2674 m_receiveThread(max_packet_size),
2676 m_bc_peerhandler(peerhandler),
2677 m_bc_receive_timeout(0),
2678 m_shutting_down(false),
2679 m_next_remote_peer_id(2)
2682 m_udpSocket.setTimeoutMs(5);
2684 m_sendThread.setParent(this);
2685 m_receiveThread.setParent(this);
2687 m_sendThread.Start();
2688 m_receiveThread.Start();
2693 Connection::~Connection()
2695 m_shutting_down = true;
2696 // request threads to stop
2697 m_sendThread.Stop();
2698 m_receiveThread.Stop();
2700 //TODO for some unkonwn reason send/receive threads do not exit as they're
2701 // supposed to be but wait on peer timeout. To speed up shutdown we reduce
2702 // timeout to half a second.
2703 m_sendThread.setPeerTimeout(0.5);
2705 // wait for threads to finish
2706 m_sendThread.Wait();
2707 m_receiveThread.Wait();
2710 for(std::map<u16, Peer*>::iterator
2711 j = m_peers.begin();
2712 j != m_peers.end(); ++j)
2718 /* Internal stuff */
2719 void Connection::putEvent(ConnectionEvent &e)
2721 assert(e.type != CONNEVENT_NONE); // Pre-condition
2722 m_event_queue.push_back(e);
2725 PeerHelper Connection::getPeer(u16 peer_id)
2727 JMutexAutoLock peerlock(m_peers_mutex);
2728 std::map<u16, Peer*>::iterator node = m_peers.find(peer_id);
2730 if (node == m_peers.end()) {
2731 throw PeerNotFoundException("GetPeer: Peer not found (possible timeout)");
2735 FATAL_ERROR_IF(node->second->id != peer_id, "Invalid peer id");
2737 return PeerHelper(node->second);
2740 PeerHelper Connection::getPeerNoEx(u16 peer_id)
2742 JMutexAutoLock peerlock(m_peers_mutex);
2743 std::map<u16, Peer*>::iterator node = m_peers.find(peer_id);
2745 if (node == m_peers.end()) {
2746 return PeerHelper(NULL);
2750 FATAL_ERROR_IF(node->second->id != peer_id, "Invalid peer id");
2752 return PeerHelper(node->second);
2755 /* find peer_id for address */
2756 u16 Connection::lookupPeer(Address& sender)
2758 JMutexAutoLock peerlock(m_peers_mutex);
2759 std::map<u16, Peer*>::iterator j;
2760 j = m_peers.begin();
2761 for(; j != m_peers.end(); ++j)
2763 Peer *peer = j->second;
2764 if (peer->isActive())
2769 if ((peer->getAddress(MTP_MINETEST_RELIABLE_UDP, tocheck)) && (tocheck == sender))
2772 if ((peer->getAddress(MTP_UDP, tocheck)) && (tocheck == sender))
2776 return PEER_ID_INEXISTENT;
2779 std::list<Peer*> Connection::getPeers()
2781 std::list<Peer*> list;
2782 for(std::map<u16, Peer*>::iterator j = m_peers.begin();
2783 j != m_peers.end(); ++j)
2785 Peer *peer = j->second;
2786 list.push_back(peer);
2791 bool Connection::deletePeer(u16 peer_id, bool timeout)
2795 /* lock list as short as possible */
2797 JMutexAutoLock peerlock(m_peers_mutex);
2798 if (m_peers.find(peer_id) == m_peers.end())
2800 peer = m_peers[peer_id];
2801 m_peers.erase(peer_id);
2802 m_peer_ids.remove(peer_id);
2805 Address peer_address;
2806 //any peer has a primary address this never fails!
2807 peer->getAddress(MTP_PRIMARY, peer_address);
2810 e.peerRemoved(peer_id, timeout, peer_address);
2820 ConnectionEvent Connection::getEvent()
2822 if (m_event_queue.empty()) {
2824 e.type = CONNEVENT_NONE;
2827 return m_event_queue.pop_frontNoEx();
2830 ConnectionEvent Connection::waitEvent(u32 timeout_ms)
2833 return m_event_queue.pop_front(timeout_ms);
2834 } catch(ItemNotFoundException &ex) {
2836 e.type = CONNEVENT_NONE;
2841 void Connection::putCommand(ConnectionCommand &c)
2843 if (!m_shutting_down) {
2844 m_command_queue.push_back(c);
2845 m_sendThread.Trigger();
2849 void Connection::Serve(Address bind_addr)
2851 ConnectionCommand c;
2856 void Connection::Connect(Address address)
2858 ConnectionCommand c;
2863 bool Connection::Connected()
2865 JMutexAutoLock peerlock(m_peers_mutex);
2867 if (m_peers.size() != 1)
2870 std::map<u16, Peer*>::iterator node = m_peers.find(PEER_ID_SERVER);
2871 if (node == m_peers.end())
2874 if (m_peer_id == PEER_ID_INEXISTENT)
2880 void Connection::Disconnect()
2882 ConnectionCommand c;
2887 u32 Connection::Receive(u16 &peer_id, SharedBuffer<u8> &data)
2890 ConnectionEvent e = waitEvent(m_bc_receive_timeout);
2891 if (e.type != CONNEVENT_NONE)
2892 LOG(dout_con<<getDesc()<<": Receive: got event: "
2893 <<e.describe()<<std::endl);
2895 case CONNEVENT_NONE:
2896 throw NoIncomingDataException("No incoming data");
2897 case CONNEVENT_DATA_RECEIVED:
2898 peer_id = e.peer_id;
2899 data = SharedBuffer<u8>(e.data);
2900 return e.data.getSize();
2901 case CONNEVENT_PEER_ADDED: {
2902 UDPPeer tmp(e.peer_id, e.address, this);
2903 if (m_bc_peerhandler)
2904 m_bc_peerhandler->peerAdded(&tmp);
2906 case CONNEVENT_PEER_REMOVED: {
2907 UDPPeer tmp(e.peer_id, e.address, this);
2908 if (m_bc_peerhandler)
2909 m_bc_peerhandler->deletingPeer(&tmp, e.timeout);
2911 case CONNEVENT_BIND_FAILED:
2912 throw ConnectionBindFailed("Failed to bind socket "
2913 "(port already in use?)");
2916 throw NoIncomingDataException("No incoming data");
2919 void Connection::Send(u16 peer_id, u8 channelnum,
2920 NetworkPacket* pkt, bool reliable)
2922 assert(channelnum < CHANNEL_COUNT); // Pre-condition
2924 ConnectionCommand c;
2926 c.send(peer_id, channelnum, pkt, reliable);
2930 Address Connection::GetPeerAddress(u16 peer_id)
2932 PeerHelper peer = getPeerNoEx(peer_id);
2935 throw PeerNotFoundException("No address for peer found!");
2936 Address peer_address;
2937 peer->getAddress(MTP_PRIMARY, peer_address);
2938 return peer_address;
2941 float Connection::getPeerStat(u16 peer_id, rtt_stat_type type)
2943 PeerHelper peer = getPeerNoEx(peer_id);
2944 if (!peer) return -1;
2945 return peer->getStat(type);
2948 float Connection::getLocalStat(rate_stat_type type)
2950 PeerHelper peer = getPeerNoEx(PEER_ID_SERVER);
2952 FATAL_ERROR_IF(!peer, "Connection::getLocalStat we couldn't get our own peer? are you serious???");
2956 for (u16 j=0; j<CHANNEL_COUNT; j++) {
2959 retval += dynamic_cast<UDPPeer*>(&peer)->channels[j].getCurrentDownloadRateKB();
2962 retval += dynamic_cast<UDPPeer*>(&peer)->channels[j].getAvgDownloadRateKB();
2965 retval += dynamic_cast<UDPPeer*>(&peer)->channels[j].getCurrentIncomingRateKB();
2968 retval += dynamic_cast<UDPPeer*>(&peer)->channels[j].getAvgIncomingRateKB();
2971 retval += dynamic_cast<UDPPeer*>(&peer)->channels[j].getAvgLossRateKB();
2974 retval += dynamic_cast<UDPPeer*>(&peer)->channels[j].getCurrentLossRateKB();
2977 FATAL_ERROR("Connection::getLocalStat Invalid stat type");
2983 u16 Connection::createPeer(Address& sender, MTProtocols protocol, int fd)
2985 // Somebody wants to make a new connection
2987 // Get a unique peer id (2 or higher)
2988 u16 peer_id_new = m_next_remote_peer_id;
2989 u16 overflow = MAX_UDP_PEERS;
2992 Find an unused peer id
2994 JMutexAutoLock lock(m_peers_mutex);
2995 bool out_of_ids = false;
2998 if (m_peers.find(peer_id_new) == m_peers.end())
3001 // Check for overflow
3002 if (peer_id_new == overflow) {
3010 errorstream << getDesc() << " ran out of peer ids" << std::endl;
3011 return PEER_ID_INEXISTENT;
3016 peer = new UDPPeer(peer_id_new, sender, this);
3018 m_peers[peer->id] = peer;
3019 m_peer_ids.push_back(peer->id);
3021 m_next_remote_peer_id = (peer_id_new +1 ) % MAX_UDP_PEERS;
3023 LOG(dout_con << getDesc()
3024 << "createPeer(): giving peer_id=" << peer_id_new << std::endl);
3026 ConnectionCommand cmd;
3027 SharedBuffer<u8> reply(4);
3028 writeU8(&reply[0], TYPE_CONTROL);
3029 writeU8(&reply[1], CONTROLTYPE_SET_PEER_ID);
3030 writeU16(&reply[2], peer_id_new);
3031 cmd.createPeer(peer_id_new,reply);
3034 // Create peer addition event
3036 e.peerAdded(peer_id_new, sender);
3039 // We're now talking to a valid peer_id
3043 void Connection::PrintInfo(std::ostream &out)
3045 m_info_mutex.Lock();
3046 out<<getDesc()<<": ";
3047 m_info_mutex.Unlock();
3050 void Connection::PrintInfo()
3052 PrintInfo(dout_con);
3055 const std::string Connection::getDesc()
3057 return std::string("con(")+
3058 itos(m_udpSocket.GetHandle())+"/"+itos(m_peer_id)+")";
3061 void Connection::DisconnectPeer(u16 peer_id)
3063 ConnectionCommand discon;
3064 discon.disconnect_peer(peer_id);
3068 void Connection::sendAck(u16 peer_id, u8 channelnum, u16 seqnum)
3070 assert(channelnum < CHANNEL_COUNT); // Pre-condition
3072 LOG(dout_con<<getDesc()
3073 <<" Queuing ACK command to peer_id: " << peer_id <<
3074 " channel: " << (channelnum & 0xFF) <<
3075 " seqnum: " << seqnum << std::endl);
3077 ConnectionCommand c;
3078 SharedBuffer<u8> ack(4);
3079 writeU8(&ack[0], TYPE_CONTROL);
3080 writeU8(&ack[1], CONTROLTYPE_ACK);
3081 writeU16(&ack[2], seqnum);
3083 c.ack(peer_id, channelnum, ack);
3085 m_sendThread.Trigger();
3088 UDPPeer* Connection::createServerPeer(Address& address)
3090 if (getPeerNoEx(PEER_ID_SERVER) != 0)
3092 throw ConnectionException("Already connected to a server");
3095 UDPPeer *peer = new UDPPeer(PEER_ID_SERVER, address, this);
3098 JMutexAutoLock lock(m_peers_mutex);
3099 m_peers[peer->id] = peer;
3100 m_peer_ids.push_back(peer->id);