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"
32 #include "main.h" // for profiling
37 /******************************************************************************/
38 /* defines used for debugging and profiling */
39 /******************************************************************************/
43 #undef DEBUG_CONNECTION_KBPS
45 /* this mutex is used to achieve log message consistency */
46 JMutex log_message_mutex;
49 JMutexAutoLock loglock(log_message_mutex); \
53 //#define DEBUG_CONNECTION_KBPS
54 #undef DEBUG_CONNECTION_KBPS
58 static inline float CALC_DTIME(unsigned int lasttime, unsigned int curtime) {
59 float value = ( curtime - lasttime) / 1000.0;
60 return MYMAX(MYMIN(value,0.1),0.0);
63 /* maximum window size to use, 0xFFFF is theoretical maximum don't think about
64 * touching it, the less you're away from it the more likely data corruption
67 #define MAX_RELIABLE_WINDOW_SIZE 0x8000
68 /* starting value for window size */
69 #define MIN_RELIABLE_WINDOW_SIZE 0x40
71 #define MAX_UDP_PEERS 65535
73 #define PING_TIMEOUT 5.0
75 static u16 readPeerId(u8 *packetdata)
77 return readU16(&packetdata[4]);
79 static u8 readChannel(u8 *packetdata)
81 return readU8(&packetdata[6]);
84 BufferedPacket makePacket(Address &address, u8 *data, u32 datasize,
85 u32 protocol_id, u16 sender_peer_id, u8 channel)
87 u32 packet_size = datasize + BASE_HEADER_SIZE;
88 BufferedPacket p(packet_size);
91 writeU32(&p.data[0], protocol_id);
92 writeU16(&p.data[4], sender_peer_id);
93 writeU8(&p.data[6], channel);
95 memcpy(&p.data[BASE_HEADER_SIZE], data, datasize);
100 BufferedPacket makePacket(Address &address, SharedBuffer<u8> &data,
101 u32 protocol_id, u16 sender_peer_id, u8 channel)
103 return makePacket(address, *data, data.getSize(),
104 protocol_id, sender_peer_id, channel);
107 SharedBuffer<u8> makeOriginalPacket(
108 SharedBuffer<u8> data)
111 u32 packet_size = data.getSize() + header_size;
112 SharedBuffer<u8> b(packet_size);
114 writeU8(&(b[0]), TYPE_ORIGINAL);
115 if (data.getSize() > 0) {
116 memcpy(&(b[header_size]), *data, data.getSize());
121 std::list<SharedBuffer<u8> > makeSplitPacket(
122 SharedBuffer<u8> data,
126 // Chunk packets, containing the TYPE_SPLIT header
127 std::list<SharedBuffer<u8> > chunks;
129 u32 chunk_header_size = 7;
130 u32 maximum_data_size = chunksize_max - chunk_header_size;
136 end = start + maximum_data_size - 1;
137 if(end > data.getSize() - 1)
138 end = data.getSize() - 1;
140 u32 payload_size = end - start + 1;
141 u32 packet_size = chunk_header_size + payload_size;
143 SharedBuffer<u8> chunk(packet_size);
145 writeU8(&chunk[0], TYPE_SPLIT);
146 writeU16(&chunk[1], seqnum);
147 // [3] u16 chunk_count is written at next stage
148 writeU16(&chunk[5], chunk_num);
149 memcpy(&chunk[chunk_header_size], &data[start], payload_size);
151 chunks.push_back(chunk);
157 while(end != data.getSize() - 1);
159 for(std::list<SharedBuffer<u8> >::iterator i = chunks.begin();
160 i != chunks.end(); ++i)
163 writeU16(&((*i)[3]), chunk_count);
169 std::list<SharedBuffer<u8> > makeAutoSplitPacket(
170 SharedBuffer<u8> data,
174 u32 original_header_size = 1;
175 std::list<SharedBuffer<u8> > list;
176 if(data.getSize() + original_header_size > chunksize_max)
178 list = makeSplitPacket(data, chunksize_max, split_seqnum);
184 list.push_back(makeOriginalPacket(data));
189 SharedBuffer<u8> makeReliablePacket(
190 SharedBuffer<u8> data,
194 u32 packet_size = data.getSize() + header_size;
195 SharedBuffer<u8> b(packet_size);
197 writeU8(&b[0], TYPE_RELIABLE);
198 writeU16(&b[1], seqnum);
200 memcpy(&b[header_size], *data, data.getSize());
209 ReliablePacketBuffer::ReliablePacketBuffer(): m_list_size(0) {}
211 void ReliablePacketBuffer::print()
213 JMutexAutoLock listlock(m_list_mutex);
214 LOG(dout_con<<"Dump of ReliablePacketBuffer:" << std::endl);
215 unsigned int index = 0;
216 for(std::list<BufferedPacket>::iterator i = m_list.begin();
220 u16 s = readU16(&(i->data[BASE_HEADER_SIZE+1]));
221 LOG(dout_con<<index<< ":" << s << std::endl);
225 bool ReliablePacketBuffer::empty()
227 JMutexAutoLock listlock(m_list_mutex);
228 return m_list.empty();
231 u32 ReliablePacketBuffer::size()
236 bool ReliablePacketBuffer::containsPacket(u16 seqnum)
238 return !(findPacket(seqnum) == m_list.end());
241 RPBSearchResult ReliablePacketBuffer::findPacket(u16 seqnum)
243 std::list<BufferedPacket>::iterator i = m_list.begin();
244 for(; i != m_list.end(); ++i)
246 u16 s = readU16(&(i->data[BASE_HEADER_SIZE+1]));
247 /*dout_con<<"findPacket(): finding seqnum="<<seqnum
248 <<", comparing to s="<<s<<std::endl;*/
254 RPBSearchResult ReliablePacketBuffer::notFound()
258 bool ReliablePacketBuffer::getFirstSeqnum(u16& result)
260 JMutexAutoLock listlock(m_list_mutex);
263 BufferedPacket p = *m_list.begin();
264 result = readU16(&p.data[BASE_HEADER_SIZE+1]);
268 BufferedPacket ReliablePacketBuffer::popFirst()
270 JMutexAutoLock listlock(m_list_mutex);
272 throw NotFoundException("Buffer is empty");
273 BufferedPacket p = *m_list.begin();
274 m_list.erase(m_list.begin());
277 if (m_list_size == 0) {
278 m_oldest_non_answered_ack = 0;
280 m_oldest_non_answered_ack =
281 readU16(&(*m_list.begin()).data[BASE_HEADER_SIZE+1]);
285 BufferedPacket ReliablePacketBuffer::popSeqnum(u16 seqnum)
287 JMutexAutoLock listlock(m_list_mutex);
288 RPBSearchResult r = findPacket(seqnum);
290 LOG(dout_con<<"Sequence number: " << seqnum
291 << " not found in reliable buffer"<<std::endl);
292 throw NotFoundException("seqnum not found in buffer");
294 BufferedPacket p = *r;
297 RPBSearchResult next = r;
299 if (next != notFound()) {
300 u16 s = readU16(&(next->data[BASE_HEADER_SIZE+1]));
301 m_oldest_non_answered_ack = s;
307 if (m_list_size == 0)
308 { m_oldest_non_answered_ack = 0; }
310 { m_oldest_non_answered_ack = readU16(&(*m_list.begin()).data[BASE_HEADER_SIZE+1]); }
313 void ReliablePacketBuffer::insert(BufferedPacket &p,u16 next_expected)
315 JMutexAutoLock listlock(m_list_mutex);
316 assert(p.data.getSize() >= BASE_HEADER_SIZE+3);
317 u8 type = readU8(&p.data[BASE_HEADER_SIZE+0]);
318 assert(type == TYPE_RELIABLE);
319 u16 seqnum = readU16(&p.data[BASE_HEADER_SIZE+1]);
321 assert(seqnum_in_window(seqnum,next_expected,MAX_RELIABLE_WINDOW_SIZE));
322 assert(seqnum != next_expected);
325 assert(m_list_size <= SEQNUM_MAX+1);
327 // Find the right place for the packet and insert it there
328 // If list is empty, just add it
332 m_oldest_non_answered_ack = seqnum;
337 // Otherwise find the right place
338 std::list<BufferedPacket>::iterator i = m_list.begin();
339 // Find the first packet in the list which has a higher seqnum
340 u16 s = readU16(&(i->data[BASE_HEADER_SIZE+1]));
342 /* case seqnum is smaller then next_expected seqnum */
343 /* this is true e.g. on wrap around */
344 if (seqnum < next_expected) {
345 while(((s < seqnum) || (s >= next_expected)) && (i != m_list.end())) {
347 if (i != m_list.end())
348 s = readU16(&(i->data[BASE_HEADER_SIZE+1]));
351 /* non wrap around case (at least for incoming and next_expected */
354 while(((s < seqnum) && (s >= next_expected)) && (i != m_list.end())) {
356 if (i != m_list.end())
357 s = readU16(&(i->data[BASE_HEADER_SIZE+1]));
363 (readU16(&(i->data[BASE_HEADER_SIZE+1])) != seqnum) ||
364 (i->data.getSize() != p.data.getSize()) ||
365 (i->address != p.address)
368 /* if this happens your maximum transfer window may be to big */
370 "Duplicated seqnum %d non matching packet detected:\n",
372 fprintf(stderr, "Old: seqnum: %05d size: %04d, address: %s\n",
373 readU16(&(i->data[BASE_HEADER_SIZE+1])),i->data.getSize(),
374 i->address.serializeString().c_str());
375 fprintf(stderr, "New: seqnum: %05d size: %04d, address: %s\n",
376 readU16(&(p.data[BASE_HEADER_SIZE+1])),p.data.getSize(),
377 p.address.serializeString().c_str());
378 throw IncomingDataCorruption("duplicated packet isn't same as original one");
381 assert(readU16(&(i->data[BASE_HEADER_SIZE+1])) == seqnum);
382 assert(i->data.getSize() == p.data.getSize());
383 assert(i->address == p.address);
385 /* nothing to do this seems to be a resent packet */
386 /* for paranoia reason data should be compared */
389 /* insert or push back */
390 else if (i != m_list.end()) {
397 /* update last packet number */
398 m_oldest_non_answered_ack = readU16(&(*m_list.begin()).data[BASE_HEADER_SIZE+1]);
401 void ReliablePacketBuffer::incrementTimeouts(float dtime)
403 JMutexAutoLock listlock(m_list_mutex);
404 for(std::list<BufferedPacket>::iterator i = m_list.begin();
405 i != m_list.end(); ++i)
408 i->totaltime += dtime;
412 std::list<BufferedPacket> ReliablePacketBuffer::getTimedOuts(float timeout,
413 unsigned int max_packets)
415 JMutexAutoLock listlock(m_list_mutex);
416 std::list<BufferedPacket> timed_outs;
417 for(std::list<BufferedPacket>::iterator i = m_list.begin();
418 i != m_list.end(); ++i)
420 if(i->time >= timeout) {
421 timed_outs.push_back(*i);
423 //this packet will be sent right afterwards reset timeout here
425 if (timed_outs.size() >= max_packets)
436 IncomingSplitBuffer::~IncomingSplitBuffer()
438 JMutexAutoLock listlock(m_map_mutex);
439 for(std::map<u16, IncomingSplitPacket*>::iterator i = m_buf.begin();
440 i != m_buf.end(); ++i)
446 This will throw a GotSplitPacketException when a full
447 split packet is constructed.
449 SharedBuffer<u8> IncomingSplitBuffer::insert(BufferedPacket &p, bool reliable)
451 JMutexAutoLock listlock(m_map_mutex);
452 u32 headersize = BASE_HEADER_SIZE + 7;
453 assert(p.data.getSize() >= headersize);
454 u8 type = readU8(&p.data[BASE_HEADER_SIZE+0]);
455 assert(type == TYPE_SPLIT);
456 u16 seqnum = readU16(&p.data[BASE_HEADER_SIZE+1]);
457 u16 chunk_count = readU16(&p.data[BASE_HEADER_SIZE+3]);
458 u16 chunk_num = readU16(&p.data[BASE_HEADER_SIZE+5]);
460 // Add if doesn't exist
461 if(m_buf.find(seqnum) == m_buf.end())
463 IncomingSplitPacket *sp = new IncomingSplitPacket();
464 sp->chunk_count = chunk_count;
465 sp->reliable = reliable;
469 IncomingSplitPacket *sp = m_buf[seqnum];
471 // TODO: These errors should be thrown or something? Dunno.
472 if(chunk_count != sp->chunk_count)
473 LOG(derr_con<<"Connection: WARNING: chunk_count="<<chunk_count
474 <<" != sp->chunk_count="<<sp->chunk_count
476 if(reliable != sp->reliable)
477 LOG(derr_con<<"Connection: WARNING: reliable="<<reliable
478 <<" != sp->reliable="<<sp->reliable
481 // If chunk already exists, ignore it.
482 // Sometimes two identical packets may arrive when there is network
483 // lag and the server re-sends stuff.
484 if(sp->chunks.find(chunk_num) != sp->chunks.end())
485 return SharedBuffer<u8>();
487 // Cut chunk data out of packet
488 u32 chunkdatasize = p.data.getSize() - headersize;
489 SharedBuffer<u8> chunkdata(chunkdatasize);
490 memcpy(*chunkdata, &(p.data[headersize]), chunkdatasize);
492 // Set chunk data in buffer
493 sp->chunks[chunk_num] = chunkdata;
495 // If not all chunks are received, return empty buffer
496 if(sp->allReceived() == false)
497 return SharedBuffer<u8>();
499 // Calculate total size
501 for(std::map<u16, SharedBuffer<u8> >::iterator i = sp->chunks.begin();
502 i != sp->chunks.end(); ++i)
504 totalsize += i->second.getSize();
507 SharedBuffer<u8> fulldata(totalsize);
509 // Copy chunks to data buffer
511 for(u32 chunk_i=0; chunk_i<sp->chunk_count;
514 SharedBuffer<u8> buf = sp->chunks[chunk_i];
515 u16 chunkdatasize = buf.getSize();
516 memcpy(&fulldata[start], *buf, chunkdatasize);
517 start += chunkdatasize;;
520 // Remove sp from buffer
526 void IncomingSplitBuffer::removeUnreliableTimedOuts(float dtime, float timeout)
528 std::list<u16> remove_queue;
530 JMutexAutoLock listlock(m_map_mutex);
531 for(std::map<u16, IncomingSplitPacket*>::iterator i = m_buf.begin();
532 i != m_buf.end(); ++i)
534 IncomingSplitPacket *p = i->second;
535 // Reliable ones are not removed by timeout
536 if(p->reliable == true)
539 if(p->time >= timeout)
540 remove_queue.push_back(i->first);
543 for(std::list<u16>::iterator j = remove_queue.begin();
544 j != remove_queue.end(); ++j)
546 JMutexAutoLock listlock(m_map_mutex);
547 LOG(dout_con<<"NOTE: Removing timed out unreliable split packet"<<std::endl);
558 window_size(MIN_RELIABLE_WINDOW_SIZE),
559 next_incoming_seqnum(SEQNUM_INITIAL),
560 next_outgoing_seqnum(SEQNUM_INITIAL),
561 next_outgoing_split_seqnum(SEQNUM_INITIAL),
562 current_packet_loss(0),
563 current_packet_too_late(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& successfull)
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);
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)))
1063 LOG(dout_con<<m_connection->getDesc()
1064 <<" processing reliable command for peer id: " << c.peer_id
1065 <<" data size: " << c.data.getSize() << std::endl);
1066 if (!processReliableSendCommand(c,max_packet_size))
1068 channels[c.channelnum].queued_commands.push_back(c);
1073 LOG(dout_con<<m_connection->getDesc()
1074 <<" Queueing reliable command for peer id: " << c.peer_id
1075 <<" data size: " << c.data.getSize() <<std::endl);
1076 channels[c.channelnum].queued_commands.push_back(c);
1080 bool UDPPeer::processReliableSendCommand(
1081 ConnectionCommand &c,
1082 unsigned int max_packet_size)
1084 if (m_pending_disconnect)
1087 u32 chunksize_max = max_packet_size
1089 - RELIABLE_HEADER_SIZE;
1091 assert(c.data.getSize() < MAX_RELIABLE_WINDOW_SIZE*512);
1093 std::list<SharedBuffer<u8> > originals;
1094 u16 split_sequence_number = channels[c.channelnum].readNextSplitSeqNum();
1098 originals.push_back(c.data);
1101 originals = makeAutoSplitPacket(c.data, chunksize_max,split_sequence_number);
1102 channels[c.channelnum].setNextSplitSeqNum(split_sequence_number);
1105 bool have_sequence_number = true;
1106 bool have_initial_sequence_number = false;
1107 Queue<BufferedPacket> toadd;
1108 volatile u16 initial_sequence_number = 0;
1110 for(std::list<SharedBuffer<u8> >::iterator i = originals.begin();
1111 i != originals.end(); ++i)
1113 u16 seqnum = channels[c.channelnum].getOutgoingSequenceNumber(have_sequence_number);
1115 /* oops, we don't have enough sequence numbers to send this packet */
1116 if (!have_sequence_number)
1119 if (!have_initial_sequence_number)
1121 initial_sequence_number = seqnum;
1122 have_initial_sequence_number = true;
1125 SharedBuffer<u8> reliable = makeReliablePacket(*i, seqnum);
1127 // Add base headers and make a packet
1128 BufferedPacket p = con::makePacket(address, reliable,
1129 m_connection->GetProtocolID(), m_connection->GetPeerID(),
1135 if (have_sequence_number) {
1136 volatile u16 pcount = 0;
1137 while(toadd.size() > 0) {
1138 BufferedPacket p = toadd.pop_front();
1139 // LOG(dout_con<<connection->getDesc()
1140 // << " queuing reliable packet for peer_id: " << c.peer_id
1141 // << " channel: " << (c.channelnum&0xFF)
1142 // << " seqnum: " << readU16(&p.data[BASE_HEADER_SIZE+1])
1144 channels[c.channelnum].queued_reliables.push_back(p);
1147 assert(channels[c.channelnum].queued_reliables.size() < 0xFFFF);
1151 volatile u16 packets_available = toadd.size();
1152 /* we didn't get a single sequence number no need to fill queue */
1153 if (!have_initial_sequence_number)
1157 while(toadd.size() > 0) {
1161 bool successfully_put_back_sequence_number
1162 = channels[c.channelnum].putBackSequenceNumber(
1163 (initial_sequence_number+toadd.size() % (SEQNUM_MAX+1)));
1165 assert(successfully_put_back_sequence_number);
1167 LOG(dout_con<<m_connection->getDesc()
1168 << " Windowsize exceeded on reliable sending "
1169 << c.data.getSize() << " bytes"
1170 << std::endl << "\t\tinitial_sequence_number: "
1171 << initial_sequence_number
1172 << std::endl << "\t\tgot at most : "
1173 << packets_available << " packets"
1174 << std::endl << "\t\tpackets queued : "
1175 << channels[c.channelnum].outgoing_reliables_sent.size()
1181 void UDPPeer::RunCommandQueues(
1182 unsigned int max_packet_size,
1183 unsigned int maxcommands,
1184 unsigned int maxtransfer)
1187 for (unsigned int i = 0; i < CHANNEL_COUNT; i++)
1189 unsigned int commands_processed = 0;
1191 if ((channels[i].queued_commands.size() > 0) &&
1192 (channels[i].queued_reliables.size() < maxtransfer) &&
1193 (commands_processed < maxcommands))
1196 ConnectionCommand c = channels[i].queued_commands.pop_front();
1197 LOG(dout_con<<m_connection->getDesc()
1198 <<" processing queued reliable command "<<std::endl);
1199 if (!processReliableSendCommand(c,max_packet_size)) {
1200 LOG(dout_con<<m_connection->getDesc()
1201 << " Failed to queue packets for peer_id: " << c.peer_id
1202 << ", delaying sending of " << c.data.getSize()
1203 << " bytes" << std::endl);
1204 channels[i].queued_commands.push_front(c);
1207 catch (ItemNotFoundException &e) {
1208 // intentionally empty
1214 u16 UDPPeer::getNextSplitSequenceNumber(u8 channel)
1216 assert(channel < CHANNEL_COUNT);
1217 return channels[channel].readNextIncomingSeqNum();
1220 void UDPPeer::setNextSplitSequenceNumber(u8 channel, u16 seqnum)
1222 assert(channel < CHANNEL_COUNT);
1223 channels[channel].setNextSplitSeqNum(seqnum);
1226 SharedBuffer<u8> UDPPeer::addSpiltPacket(u8 channel,
1227 BufferedPacket toadd,
1230 assert(channel < CHANNEL_COUNT);
1231 return channels[channel].incoming_splits.insert(toadd,reliable);
1234 /******************************************************************************/
1235 /* Connection Threads */
1236 /******************************************************************************/
1238 ConnectionSendThread::ConnectionSendThread(Connection* parent,
1239 unsigned int max_packet_size,
1241 m_connection(parent),
1242 m_max_packet_size(max_packet_size),
1244 m_max_commands_per_iteration(1),
1245 m_max_data_packets_per_iteration(g_settings->getU16("max_packets_per_iteration")),
1246 m_max_packets_requeued(256)
1250 void * ConnectionSendThread::Thread()
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(derr_con);
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 ((this->m_outgoing_queue.size() > 0) && (peerIds.size() > 0))
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++)
1334 Channel *channel = &(dynamic_cast<UDPPeer*>(&peer))->channels[i];
1336 if (channel->queued_commands.size() > 0)
1347 void ConnectionSendThread::runTimeouts(float dtime)
1349 std::list<u16> timeouted_peers;
1350 std::list<u16> peerIds = m_connection->getPeerIDs();
1352 for(std::list<u16>::iterator j = peerIds.begin();
1353 j != peerIds.end(); ++j)
1355 PeerHelper peer = m_connection->getPeerNoEx(*j);
1360 if(dynamic_cast<UDPPeer*>(&peer) == 0)
1363 PROFILE(std::stringstream peerIdentifier);
1364 PROFILE(peerIdentifier << "runTimeouts[" << m_connection->getDesc()
1365 << ";" << *j << ";RELIABLE]");
1366 PROFILE(ScopeProfiler peerprofiler(g_profiler, peerIdentifier.str(), SPT_AVG));
1368 SharedBuffer<u8> data(2); // data for sending ping, required here because of goto
1373 if(peer->isTimedOut(m_timeout))
1375 infostream<<m_connection->getDesc()
1376 <<"RunTimeouts(): Peer "<<peer->id
1378 <<" (source=peer->timeout_counter)"
1380 // Add peer to the list
1381 timeouted_peers.push_back(peer->id);
1382 // Don't bother going through the buffers of this one
1386 float resend_timeout = dynamic_cast<UDPPeer*>(&peer)->getResendTimeout();
1387 for(u16 i=0; i<CHANNEL_COUNT; i++)
1389 std::list<BufferedPacket> timed_outs;
1390 Channel *channel = &(dynamic_cast<UDPPeer*>(&peer))->channels[i];
1392 if (dynamic_cast<UDPPeer*>(&peer)->getLegacyPeer())
1393 channel->setWindowSize(g_settings->getU16("workaround_window_size"));
1395 // Remove timed out incomplete unreliable split packets
1396 channel->incoming_splits.removeUnreliableTimedOuts(dtime, m_timeout);
1398 // Increment reliable packet times
1399 channel->outgoing_reliables_sent.incrementTimeouts(dtime);
1401 unsigned int numpeers = m_connection->m_peers.size();
1406 // Re-send timed out outgoing reliables
1407 timed_outs = channel->
1408 outgoing_reliables_sent.getTimedOuts(resend_timeout,
1409 (m_max_data_packets_per_iteration/numpeers));
1411 channel->UpdatePacketLossCounter(timed_outs.size());
1413 m_iteration_packets_avaialble -= timed_outs.size();
1415 for(std::list<BufferedPacket>::iterator k = timed_outs.begin();
1416 k != timed_outs.end(); ++k)
1418 u16 peer_id = readPeerId(*(k->data));
1419 u8 channelnum = readChannel(*(k->data));
1420 u16 seqnum = readU16(&(k->data[BASE_HEADER_SIZE+1]));
1422 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);
1505 bool ConnectionSendThread::rawSendAsPacket(u16 peer_id, u8 channelnum,
1506 SharedBuffer<u8> data, bool reliable)
1508 PeerHelper peer = m_connection->getPeerNoEx(peer_id);
1510 LOG(dout_con<<m_connection->getDesc()
1511 <<" INFO: dropped packet for non existent peer_id: "
1512 << peer_id << std::endl);
1513 assert(reliable && "trying to send raw packet reliable but no peer found!");
1516 Channel *channel = &(dynamic_cast<UDPPeer*>(&peer)->channels[channelnum]);
1520 bool have_sequence_number_for_raw_packet = true;
1522 channel->getOutgoingSequenceNumber(have_sequence_number_for_raw_packet);
1524 if (!have_sequence_number_for_raw_packet)
1527 SharedBuffer<u8> reliable = makeReliablePacket(data, seqnum);
1528 Address peer_address;
1529 peer->getAddress(MTP_MINETEST_RELIABLE_UDP, peer_address);
1531 // Add base headers and make a packet
1532 BufferedPacket p = con::makePacket(peer_address, reliable,
1533 m_connection->GetProtocolID(), m_connection->GetPeerID(),
1536 // first check if our send window is already maxed out
1537 if (channel->outgoing_reliables_sent.size()
1538 < channel->getWindowSize()) {
1539 LOG(dout_con<<m_connection->getDesc()
1540 <<" INFO: sending a reliable packet to peer_id " << peer_id
1541 <<" channel: " << channelnum
1542 <<" seqnum: " << seqnum << std::endl);
1543 sendAsPacketReliable(p,channel);
1547 LOG(dout_con<<m_connection->getDesc()
1548 <<" INFO: queueing reliable packet for peer_id: " << peer_id
1549 <<" channel: " << channelnum
1550 <<" seqnum: " << seqnum << std::endl);
1551 channel->queued_reliables.push_back(p);
1557 Address peer_address;
1559 if (peer->getAddress(MTP_UDP, peer_address))
1561 // Add base headers and make a packet
1562 BufferedPacket p = con::makePacket(peer_address, data,
1563 m_connection->GetProtocolID(), m_connection->GetPeerID(),
1571 LOG(dout_con<<m_connection->getDesc()
1572 <<" INFO: dropped unreliable packet for peer_id: " << peer_id
1573 <<" because of (yet) missing udp address" << std::endl);
1582 void ConnectionSendThread::processReliableCommand(ConnectionCommand &c)
1588 LOG(dout_con<<m_connection->getDesc()
1589 <<"UDP processing reliable CONNCMD_NONE"<<std::endl);
1593 LOG(dout_con<<m_connection->getDesc()
1594 <<"UDP processing reliable CONNCMD_SEND"<<std::endl);
1598 case CONNCMD_SEND_TO_ALL:
1599 LOG(dout_con<<m_connection->getDesc()
1600 <<"UDP processing CONNCMD_SEND_TO_ALL"<<std::endl);
1601 sendToAllReliable(c);
1604 case CONCMD_CREATE_PEER:
1605 LOG(dout_con<<m_connection->getDesc()
1606 <<"UDP processing reliable CONCMD_CREATE_PEER"<<std::endl);
1607 if (!rawSendAsPacket(c.peer_id,c.channelnum,c.data,c.reliable))
1609 /* put to queue if we couldn't send it immediately */
1614 case CONCMD_DISABLE_LEGACY:
1615 LOG(dout_con<<m_connection->getDesc()
1616 <<"UDP processing reliable CONCMD_DISABLE_LEGACY"<<std::endl);
1617 if (!rawSendAsPacket(c.peer_id,c.channelnum,c.data,c.reliable))
1619 /* put to queue if we couldn't send it immediately */
1625 case CONNCMD_CONNECT:
1626 case CONNCMD_DISCONNECT:
1628 assert("Got command that shouldn't be reliable as reliable command" == 0);
1630 LOG(dout_con<<m_connection->getDesc()
1631 <<" Invalid reliable command type: " << c.type <<std::endl);
1636 void ConnectionSendThread::processNonReliableCommand(ConnectionCommand &c)
1638 assert(!c.reliable);
1642 LOG(dout_con<<m_connection->getDesc()
1643 <<" UDP processing CONNCMD_NONE"<<std::endl);
1646 LOG(dout_con<<m_connection->getDesc()
1647 <<" UDP processing CONNCMD_SERVE port="
1648 <<c.address.serializeString()<<std::endl);
1651 case CONNCMD_CONNECT:
1652 LOG(dout_con<<m_connection->getDesc()
1653 <<" UDP processing CONNCMD_CONNECT"<<std::endl);
1656 case CONNCMD_DISCONNECT:
1657 LOG(dout_con<<m_connection->getDesc()
1658 <<" UDP processing CONNCMD_DISCONNECT"<<std::endl);
1661 case CONNCMD_DISCONNECT_PEER:
1662 LOG(dout_con<<m_connection->getDesc()
1663 <<" UDP processing CONNCMD_DISCONNECT_PEER"<<std::endl);
1664 disconnect_peer(c.peer_id);
1667 LOG(dout_con<<m_connection->getDesc()
1668 <<" UDP processing CONNCMD_SEND"<<std::endl);
1669 send(c.peer_id, c.channelnum, c.data);
1671 case CONNCMD_SEND_TO_ALL:
1672 LOG(dout_con<<m_connection->getDesc()
1673 <<" UDP processing CONNCMD_SEND_TO_ALL"<<std::endl);
1674 sendToAll(c.channelnum, c.data);
1677 LOG(dout_con<<m_connection->getDesc()
1678 <<" UDP processing CONCMD_ACK"<<std::endl);
1679 sendAsPacket(c.peer_id,c.channelnum,c.data,true);
1681 case CONCMD_CREATE_PEER:
1682 assert("Got command that should be reliable as unreliable command" == 0);
1684 LOG(dout_con<<m_connection->getDesc()
1685 <<" Invalid command type: " << c.type <<std::endl);
1689 void ConnectionSendThread::serve(Address bind_address)
1691 LOG(dout_con<<m_connection->getDesc()
1692 <<"UDP serving at port " << bind_address.serializeString() <<std::endl);
1694 m_connection->m_udpSocket.Bind(bind_address);
1695 m_connection->SetPeerID(PEER_ID_SERVER);
1697 catch(SocketException &e){
1701 m_connection->putEvent(ce);
1705 void ConnectionSendThread::connect(Address address)
1707 LOG(dout_con<<m_connection->getDesc()<<" connecting to "<<address.serializeString()
1708 <<":"<<address.getPort()<<std::endl);
1710 UDPPeer *peer = m_connection->createServerPeer(address);
1714 e.peerAdded(peer->id, peer->address);
1715 m_connection->putEvent(e);
1719 if (address.isIPv6())
1720 bind_addr.setAddress((IPv6AddressBytes*) NULL);
1722 bind_addr.setAddress(0,0,0,0);
1724 m_connection->m_udpSocket.Bind(bind_addr);
1726 // Send a dummy packet to server with peer_id = PEER_ID_INEXISTENT
1727 m_connection->SetPeerID(PEER_ID_INEXISTENT);
1728 SharedBuffer<u8> data(0);
1729 m_connection->Send(PEER_ID_SERVER, 0, data, true);
1732 void ConnectionSendThread::disconnect()
1734 LOG(dout_con<<m_connection->getDesc()<<" disconnecting"<<std::endl);
1736 // Create and send DISCO packet
1737 SharedBuffer<u8> data(2);
1738 writeU8(&data[0], TYPE_CONTROL);
1739 writeU8(&data[1], CONTROLTYPE_DISCO);
1743 std::list<u16> peerids = m_connection->getPeerIDs();
1745 for (std::list<u16>::iterator i = peerids.begin();
1749 sendAsPacket(*i, 0,data,false);
1753 void ConnectionSendThread::disconnect_peer(u16 peer_id)
1755 LOG(dout_con<<m_connection->getDesc()<<" disconnecting peer"<<std::endl);
1757 // Create and send DISCO packet
1758 SharedBuffer<u8> data(2);
1759 writeU8(&data[0], TYPE_CONTROL);
1760 writeU8(&data[1], CONTROLTYPE_DISCO);
1761 sendAsPacket(peer_id, 0,data,false);
1763 PeerHelper peer = m_connection->getPeerNoEx(peer_id);
1768 if (dynamic_cast<UDPPeer*>(&peer) == 0)
1773 dynamic_cast<UDPPeer*>(&peer)->m_pending_disconnect = true;
1776 void ConnectionSendThread::send(u16 peer_id, u8 channelnum,
1777 SharedBuffer<u8> data)
1779 assert(channelnum < CHANNEL_COUNT);
1781 PeerHelper peer = m_connection->getPeerNoEx(peer_id);
1784 LOG(dout_con<<m_connection->getDesc()<<" peer: peer_id="<<peer_id
1785 << ">>>NOT<<< found on sending packet"
1786 << ", channel " << (channelnum % 0xFF)
1787 << ", size: " << data.getSize() <<std::endl);
1791 LOG(dout_con<<m_connection->getDesc()<<" sending to peer_id="<<peer_id
1792 << ", channel " << (channelnum % 0xFF)
1793 << ", size: " << data.getSize() <<std::endl);
1795 u16 split_sequence_number = peer->getNextSplitSequenceNumber(channelnum);
1797 u32 chunksize_max = m_max_packet_size - BASE_HEADER_SIZE;
1798 std::list<SharedBuffer<u8> > originals;
1800 originals = makeAutoSplitPacket(data, chunksize_max,split_sequence_number);
1802 peer->setNextSplitSequenceNumber(channelnum,split_sequence_number);
1804 for(std::list<SharedBuffer<u8> >::iterator i = originals.begin();
1805 i != originals.end(); ++i)
1807 SharedBuffer<u8> original = *i;
1808 sendAsPacket(peer_id, channelnum, original);
1812 void ConnectionSendThread::sendReliable(ConnectionCommand &c)
1814 PeerHelper peer = m_connection->getPeerNoEx(c.peer_id);
1818 peer->PutReliableSendCommand(c,m_max_packet_size);
1821 void ConnectionSendThread::sendToAll(u8 channelnum, SharedBuffer<u8> data)
1823 std::list<u16> peerids = m_connection->getPeerIDs();
1825 for (std::list<u16>::iterator i = peerids.begin();
1829 send(*i, channelnum, data);
1833 void ConnectionSendThread::sendToAllReliable(ConnectionCommand &c)
1835 std::list<u16> peerids = m_connection->getPeerIDs();
1837 for (std::list<u16>::iterator i = peerids.begin();
1841 PeerHelper peer = m_connection->getPeerNoEx(*i);
1846 peer->PutReliableSendCommand(c,m_max_packet_size);
1850 void ConnectionSendThread::sendPackets(float dtime)
1852 std::list<u16> peerIds = m_connection->getPeerIDs();
1853 std::list<u16> pendingDisconnect;
1854 std::map<u16,bool> pending_unreliable;
1856 for(std::list<u16>::iterator
1857 j = peerIds.begin();
1858 j != peerIds.end(); ++j)
1860 PeerHelper peer = m_connection->getPeerNoEx(*j);
1861 //peer may have been removed
1863 LOG(dout_con<<m_connection->getDesc()<< " Peer not found: peer_id=" << *j << std::endl);
1866 peer->m_increment_packets_remaining = m_iteration_packets_avaialble/m_connection->m_peers.size();
1868 if (dynamic_cast<UDPPeer*>(&peer) == 0)
1873 if (dynamic_cast<UDPPeer*>(&peer)->m_pending_disconnect)
1875 pendingDisconnect.push_back(*j);
1878 PROFILE(std::stringstream peerIdentifier);
1879 PROFILE(peerIdentifier << "sendPackets[" << m_connection->getDesc() << ";" << *j << ";RELIABLE]");
1880 PROFILE(ScopeProfiler peerprofiler(g_profiler, peerIdentifier.str(), SPT_AVG));
1882 LOG(dout_con<<m_connection->getDesc()
1883 << " Handle per peer queues: peer_id=" << *j
1884 << " packet quota: " << peer->m_increment_packets_remaining << std::endl);
1885 // first send queued reliable packets for all peers (if possible)
1886 for (unsigned int i=0; i < CHANNEL_COUNT; i++)
1888 u16 next_to_ack = 0;
1889 dynamic_cast<UDPPeer*>(&peer)->channels[i].outgoing_reliables_sent.getFirstSeqnum(next_to_ack);
1890 u16 next_to_receive = 0;
1891 dynamic_cast<UDPPeer*>(&peer)->channels[i].incoming_reliables.getFirstSeqnum(next_to_receive);
1893 LOG(dout_con<<m_connection->getDesc()<< "\t channel: "
1894 << i << ", peer quota:"
1895 << peer->m_increment_packets_remaining
1897 << "\t\t\treliables on wire: "
1898 << dynamic_cast<UDPPeer*>(&peer)->channels[i].outgoing_reliables_sent.size()
1899 << ", waiting for ack for " << next_to_ack
1901 << "\t\t\tincoming_reliables: "
1902 << dynamic_cast<UDPPeer*>(&peer)->channels[i].incoming_reliables.size()
1903 << ", next reliable packet: "
1904 << dynamic_cast<UDPPeer*>(&peer)->channels[i].readNextIncomingSeqNum()
1905 << ", next queued: " << next_to_receive
1907 << "\t\t\treliables queued : "
1908 << dynamic_cast<UDPPeer*>(&peer)->channels[i].queued_reliables.size()
1910 << "\t\t\tqueued commands : "
1911 << dynamic_cast<UDPPeer*>(&peer)->channels[i].queued_commands.size()
1914 while ((dynamic_cast<UDPPeer*>(&peer)->channels[i].queued_reliables.size() > 0) &&
1915 (dynamic_cast<UDPPeer*>(&peer)->channels[i].outgoing_reliables_sent.size()
1916 < dynamic_cast<UDPPeer*>(&peer)->channels[i].getWindowSize())&&
1917 (peer->m_increment_packets_remaining > 0))
1919 BufferedPacket p = dynamic_cast<UDPPeer*>(&peer)->channels[i].queued_reliables.pop_front();
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.pop_front();
1944 assert(!packet.reliable &&
1945 "reliable packets are not allowed in outgoing queue!");
1947 PeerHelper peer = m_connection->getPeerNoEx(packet.peer_id);
1949 LOG(dout_con<<m_connection->getDesc()
1950 <<" Outgoing queue: peer_id="<<packet.peer_id
1951 << ">>>NOT<<< found on sending packet"
1952 << ", channel " << (packet.channelnum % 0xFF)
1953 << ", size: " << packet.data.getSize() <<std::endl);
1956 /* send acks immediately */
1957 else if (packet.ack)
1959 rawSendAsPacket(packet.peer_id, packet.channelnum,
1960 packet.data, packet.reliable);
1961 peer->m_increment_packets_remaining =
1962 MYMIN(0,peer->m_increment_packets_remaining--);
1965 ( peer->m_increment_packets_remaining > 0) ||
1967 rawSendAsPacket(packet.peer_id, packet.channelnum,
1968 packet.data, packet.reliable);
1969 peer->m_increment_packets_remaining--;
1972 m_outgoing_queue.push_back(packet);
1973 pending_unreliable[packet.peer_id] = true;
1977 for(std::list<u16>::iterator
1978 k = pendingDisconnect.begin();
1979 k != pendingDisconnect.end(); ++k)
1981 if (!pending_unreliable[*k])
1983 m_connection->deletePeer(*k,false);
1988 void ConnectionSendThread::sendAsPacket(u16 peer_id, u8 channelnum,
1989 SharedBuffer<u8> data, bool ack)
1991 OutgoingPacket packet(peer_id, channelnum, data, false, ack);
1992 m_outgoing_queue.push_back(packet);
1995 ConnectionReceiveThread::ConnectionReceiveThread(Connection* parent,
1996 unsigned int max_packet_size) :
1997 m_connection(parent)
2001 void * ConnectionReceiveThread::Thread()
2004 log_register_thread("ConnectionReceive");
2006 LOG(dout_con<<m_connection->getDesc()
2007 <<"ConnectionReceive thread started"<<std::endl);
2009 PROFILE(std::stringstream ThreadIdentifier);
2010 PROFILE(ThreadIdentifier << "ConnectionReceive: [" << m_connection->getDesc() << "]");
2012 porting::setThreadName("ConnectionReceive");
2014 #ifdef DEBUG_CONNECTION_KBPS
2015 u32 curtime = porting::getTimeMs();
2016 u32 lasttime = curtime;
2017 float debug_print_timer = 0.0;
2020 while(!StopRequested()) {
2021 BEGIN_DEBUG_EXCEPTION_HANDLER
2022 PROFILE(ScopeProfiler sp(g_profiler, ThreadIdentifier.str(), SPT_AVG));
2024 #ifdef DEBUG_CONNECTION_KBPS
2026 curtime = porting::getTimeMs();
2027 float dtime = CALC_DTIME(lasttime,curtime);
2030 /* receive packets */
2033 #ifdef DEBUG_CONNECTION_KBPS
2034 debug_print_timer += dtime;
2035 if (debug_print_timer > 20.0) {
2036 debug_print_timer -= 20.0;
2038 std::list<u16> peerids = m_connection->getPeerIDs();
2040 for (std::list<u16>::iterator i = peerids.begin();
2044 PeerHelper peer = m_connection->getPeerNoEx(*i);
2048 float peer_current = 0.0;
2049 float peer_loss = 0.0;
2050 float avg_rate = 0.0;
2051 float avg_loss = 0.0;
2053 for(u16 j=0; j<CHANNEL_COUNT; j++)
2055 peer_current +=peer->channels[j].getCurrentDownloadRateKB();
2056 peer_loss += peer->channels[j].getCurrentLossRateKB();
2057 avg_rate += peer->channels[j].getAvgDownloadRateKB();
2058 avg_loss += peer->channels[j].getAvgLossRateKB();
2061 std::stringstream output;
2062 output << std::fixed << std::setprecision(1);
2063 output << "OUT to Peer " << *i << " RATES (good / loss) " << std::endl;
2064 output << "\tcurrent (sum): " << peer_current << "kb/s "<< peer_loss << "kb/s" << std::endl;
2065 output << "\taverage (sum): " << avg_rate << "kb/s "<< avg_loss << "kb/s" << std::endl;
2066 output << std::setfill(' ');
2067 for(u16 j=0; j<CHANNEL_COUNT; j++)
2069 output << "\tcha " << j << ":"
2070 << " CUR: " << std::setw(6) << peer->channels[j].getCurrentDownloadRateKB() <<"kb/s"
2071 << " AVG: " << std::setw(6) << peer->channels[j].getAvgDownloadRateKB() <<"kb/s"
2072 << " MAX: " << std::setw(6) << peer->channels[j].getMaxDownloadRateKB() <<"kb/s"
2074 << " CUR: " << std::setw(6) << peer->channels[j].getCurrentLossRateKB() <<"kb/s"
2075 << " AVG: " << std::setw(6) << peer->channels[j].getAvgLossRateKB() <<"kb/s"
2076 << " MAX: " << std::setw(6) << peer->channels[j].getMaxLossRateKB() <<"kb/s"
2077 << " / WS: " << peer->channels[j].getWindowSize()
2081 fprintf(stderr,"%s\n",output.str().c_str());
2085 END_DEBUG_EXCEPTION_HANDLER(derr_con);
2087 PROFILE(g_profiler->remove(ThreadIdentifier.str()));
2091 // Receive packets from the network and buffers and create ConnectionEvents
2092 void ConnectionReceiveThread::receive()
2094 // use IPv6 minimum allowed MTU as receive buffer size as this is
2095 // theoretical reliable upper boundary of a udp packet for all IPv6 enabled
2097 unsigned int packet_maxsize = 1500;
2098 SharedBuffer<u8> packetdata(packet_maxsize);
2100 bool packet_queued = true;
2102 unsigned int loop_count = 0;
2104 /* first of all read packets from socket */
2105 /* check for incoming data available */
2106 while( (loop_count < 10) &&
2107 (m_connection->m_udpSocket.WaitData(50)))
2113 bool no_data_left = false;
2115 SharedBuffer<u8> resultdata;
2116 while(!no_data_left)
2119 no_data_left = !getFromBuffers(peer_id, resultdata);
2120 if (!no_data_left) {
2122 e.dataReceived(peer_id, resultdata);
2123 m_connection->putEvent(e);
2126 catch(ProcessedSilentlyException &e) {
2127 /* try reading again */
2130 packet_queued = false;
2134 s32 received_size = m_connection->m_udpSocket.Receive(sender, *packetdata, packet_maxsize);
2136 if ((received_size < 0) ||
2137 (received_size < BASE_HEADER_SIZE) ||
2138 (readU32(&packetdata[0]) != m_connection->GetProtocolID()))
2140 LOG(derr_con<<m_connection->getDesc()
2141 <<"Receive(): Invalid incoming packet, "
2142 <<"size: " << received_size
2143 <<", protocol: " << readU32(&packetdata[0]) <<std::endl);
2147 u16 peer_id = readPeerId(*packetdata);
2148 u8 channelnum = readChannel(*packetdata);
2150 if(channelnum > CHANNEL_COUNT-1){
2151 LOG(derr_con<<m_connection->getDesc()
2152 <<"Receive(): Invalid channel "<<channelnum<<std::endl);
2153 throw InvalidIncomingDataException("Channel doesn't exist");
2156 /* preserve original peer_id for later usage */
2157 u16 packet_peer_id = peer_id;
2159 /* Try to identify peer by sender address (may happen on join) */
2160 if(peer_id == PEER_ID_INEXISTENT)
2162 peer_id = m_connection->lookupPeer(sender);
2165 /* The peer was not found in our lists. Add it. */
2166 if(peer_id == PEER_ID_INEXISTENT)
2168 peer_id = m_connection->createPeer(sender, MTP_MINETEST_RELIABLE_UDP, 0);
2171 PeerHelper peer = m_connection->getPeerNoEx(peer_id);
2174 LOG(dout_con<<m_connection->getDesc()
2175 <<" got packet from unknown peer_id: "
2176 <<peer_id<<" Ignoring."<<std::endl);
2180 // Validate peer address
2182 Address peer_address;
2184 if (peer->getAddress(MTP_UDP, peer_address)) {
2185 if (peer_address != sender) {
2186 LOG(derr_con<<m_connection->getDesc()
2187 <<m_connection->getDesc()
2188 <<" Peer "<<peer_id<<" sending from different address."
2189 " Ignoring."<<std::endl);
2195 bool invalid_address = true;
2196 if (invalid_address) {
2197 LOG(derr_con<<m_connection->getDesc()
2198 <<m_connection->getDesc()
2199 <<" Peer "<<peer_id<<" unknown."
2200 " Ignoring."<<std::endl);
2206 /* mark peer as seen with id */
2207 if (!(packet_peer_id == PEER_ID_INEXISTENT))
2208 peer->setSentWithID();
2210 peer->ResetTimeout();
2212 Channel *channel = 0;
2214 if (dynamic_cast<UDPPeer*>(&peer) != 0)
2216 channel = &(dynamic_cast<UDPPeer*>(&peer)->channels[channelnum]);
2220 channel->UpdateBytesReceived(received_size);
2223 // Throw the received packet to channel->processPacket()
2225 // Make a new SharedBuffer from the data without the base headers
2226 SharedBuffer<u8> strippeddata(received_size - BASE_HEADER_SIZE);
2227 memcpy(*strippeddata, &packetdata[BASE_HEADER_SIZE],
2228 strippeddata.getSize());
2231 // Process it (the result is some data with no headers made by us)
2232 SharedBuffer<u8> resultdata = processPacket
2233 (channel, strippeddata, peer_id, channelnum, false);
2235 LOG(dout_con<<m_connection->getDesc()
2236 <<" ProcessPacket from peer_id: " << peer_id
2237 << ",channel: " << (channelnum & 0xFF) << ", returned "
2238 << resultdata.getSize() << " bytes" <<std::endl);
2241 e.dataReceived(peer_id, resultdata);
2242 m_connection->putEvent(e);
2243 }catch(ProcessedSilentlyException &e){
2244 }catch(ProcessedQueued &e){
2245 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 SharedBuffer<u8> resultdata;
2273 bool got = checkIncomingBuffers(channel, peer_id, resultdata);
2283 bool ConnectionReceiveThread::checkIncomingBuffers(Channel *channel,
2284 u16 &peer_id, SharedBuffer<u8> &dst)
2286 u16 firstseqnum = 0;
2287 if (channel->incoming_reliables.getFirstSeqnum(firstseqnum))
2289 if(firstseqnum == channel->readNextIncomingSeqNum())
2291 BufferedPacket p = channel->incoming_reliables.popFirst();
2292 peer_id = readPeerId(*p.data);
2293 u8 channelnum = readChannel(*p.data);
2294 u16 seqnum = readU16(&p.data[BASE_HEADER_SIZE+1]);
2296 LOG(dout_con<<m_connection->getDesc()
2297 <<"UNBUFFERING TYPE_RELIABLE"
2298 <<" seqnum="<<seqnum
2299 <<" peer_id="<<peer_id
2300 <<" channel="<<((int)channelnum&0xff)
2303 channel->incNextIncomingSeqNum();
2305 u32 headers_size = BASE_HEADER_SIZE + RELIABLE_HEADER_SIZE;
2306 // Get out the inside packet and re-process it
2307 SharedBuffer<u8> payload(p.data.getSize() - headers_size);
2308 memcpy(*payload, &p.data[headers_size], payload.getSize());
2310 dst = processPacket(channel, payload, peer_id, channelnum, true);
2317 SharedBuffer<u8> ConnectionReceiveThread::processPacket(Channel *channel,
2318 SharedBuffer<u8> packetdata, u16 peer_id, u8 channelnum, bool reliable)
2320 PeerHelper peer = m_connection->getPeer(peer_id);
2322 if(packetdata.getSize() < 1)
2323 throw InvalidIncomingDataException("packetdata.getSize() < 1");
2325 u8 type = readU8(&(packetdata[0]));
2327 if(type == TYPE_CONTROL)
2329 if(packetdata.getSize() < 2)
2330 throw InvalidIncomingDataException("packetdata.getSize() < 2");
2332 u8 controltype = readU8(&(packetdata[1]));
2334 if( (controltype == CONTROLTYPE_ACK)
2335 && (peer_id <= MAX_UDP_PEERS))
2337 assert(channel != 0);
2338 if(packetdata.getSize() < 4)
2339 throw InvalidIncomingDataException
2340 ("packetdata.getSize() < 4 (ACK header size)");
2342 u16 seqnum = readU16(&packetdata[2]);
2343 LOG(dout_con<<m_connection->getDesc()
2344 <<" [ CONTROLTYPE_ACK: channelnum="
2345 <<((int)channelnum&0xff)<<", peer_id="<<peer_id
2346 <<", seqnum="<<seqnum<< " ]"<<std::endl);
2350 channel->outgoing_reliables_sent.popSeqnum(seqnum);
2351 // Get round trip time
2352 unsigned int current_time = porting::getTimeMs();
2354 if (current_time > p.absolute_send_time)
2356 float rtt = (current_time - p.absolute_send_time) / 1000.0;
2358 // Let peer calculate stuff according to it
2359 // (avg_rtt and resend_timeout)
2360 dynamic_cast<UDPPeer*>(&peer)->reportRTT(rtt);
2362 else if (p.totaltime > 0)
2364 float rtt = p.totaltime;
2366 // Let peer calculate stuff according to it
2367 // (avg_rtt and resend_timeout)
2368 dynamic_cast<UDPPeer*>(&peer)->reportRTT(rtt);
2370 //put bytes for max bandwidth calculation
2371 channel->UpdateBytesSent(p.data.getSize(),1);
2372 if (channel->outgoing_reliables_sent.size() == 0)
2374 m_connection->TriggerSend();
2377 catch(NotFoundException &e){
2378 LOG(derr_con<<m_connection->getDesc()
2379 <<"WARNING: ACKed packet not "
2382 channel->UpdatePacketTooLateCounter();
2384 throw ProcessedSilentlyException("Got an ACK");
2386 else if((controltype == CONTROLTYPE_SET_PEER_ID)
2387 && (peer_id <= MAX_UDP_PEERS))
2389 // Got a packet to set our peer id
2390 if(packetdata.getSize() < 4)
2391 throw InvalidIncomingDataException
2392 ("packetdata.getSize() < 4 (SET_PEER_ID header size)");
2393 u16 peer_id_new = readU16(&packetdata[2]);
2394 LOG(dout_con<<m_connection->getDesc()
2395 <<"Got new peer id: "<<peer_id_new<<"... "<<std::endl);
2397 if(m_connection->GetPeerID() != PEER_ID_INEXISTENT)
2399 LOG(derr_con<<m_connection->getDesc()
2400 <<"WARNING: Not changing"
2401 " existing peer id."<<std::endl);
2405 LOG(dout_con<<m_connection->getDesc()<<"changing own peer id"<<std::endl);
2406 m_connection->SetPeerID(peer_id_new);
2409 ConnectionCommand cmd;
2411 SharedBuffer<u8> reply(2);
2412 writeU8(&reply[0], TYPE_CONTROL);
2413 writeU8(&reply[1], CONTROLTYPE_ENABLE_BIG_SEND_WINDOW);
2414 cmd.disableLegacy(PEER_ID_SERVER,reply);
2415 m_connection->putCommand(cmd);
2417 throw ProcessedSilentlyException("Got a SET_PEER_ID");
2419 else if((controltype == CONTROLTYPE_PING)
2420 && (peer_id <= MAX_UDP_PEERS))
2422 // Just ignore it, the incoming data already reset
2423 // the timeout counter
2424 LOG(dout_con<<m_connection->getDesc()<<"PING"<<std::endl);
2425 throw ProcessedSilentlyException("Got a PING");
2427 else if(controltype == CONTROLTYPE_DISCO)
2429 // Just ignore it, the incoming data already reset
2430 // the timeout counter
2431 LOG(dout_con<<m_connection->getDesc()
2432 <<"DISCO: Removing peer "<<(peer_id)<<std::endl);
2434 if(m_connection->deletePeer(peer_id, false) == false)
2436 derr_con<<m_connection->getDesc()
2437 <<"DISCO: Peer not found"<<std::endl;
2440 throw ProcessedSilentlyException("Got a DISCO");
2442 else if((controltype == CONTROLTYPE_ENABLE_BIG_SEND_WINDOW)
2443 && (peer_id <= MAX_UDP_PEERS))
2445 dynamic_cast<UDPPeer*>(&peer)->setNonLegacyPeer();
2446 throw ProcessedSilentlyException("Got non legacy control");
2449 LOG(derr_con<<m_connection->getDesc()
2450 <<"INVALID TYPE_CONTROL: invalid controltype="
2451 <<((int)controltype&0xff)<<std::endl);
2452 throw InvalidIncomingDataException("Invalid control type");
2455 else if(type == TYPE_ORIGINAL)
2457 if(packetdata.getSize() <= ORIGINAL_HEADER_SIZE)
2458 throw InvalidIncomingDataException
2459 ("packetdata.getSize() <= ORIGINAL_HEADER_SIZE");
2460 LOG(dout_con<<m_connection->getDesc()
2461 <<"RETURNING TYPE_ORIGINAL to user"
2463 // Get the inside packet out and return it
2464 SharedBuffer<u8> payload(packetdata.getSize() - ORIGINAL_HEADER_SIZE);
2465 memcpy(*payload, &(packetdata[ORIGINAL_HEADER_SIZE]), payload.getSize());
2468 else if(type == TYPE_SPLIT)
2470 Address peer_address;
2472 if (peer->getAddress(MTP_UDP, peer_address)) {
2474 // We have to create a packet again for buffering
2475 // This isn't actually too bad an idea.
2476 BufferedPacket packet = makePacket(
2479 m_connection->GetProtocolID(),
2483 // Buffer the packet
2484 SharedBuffer<u8> data =
2485 peer->addSpiltPacket(channelnum,packet,reliable);
2487 if(data.getSize() != 0)
2489 LOG(dout_con<<m_connection->getDesc()
2490 <<"RETURNING TYPE_SPLIT: Constructed full data, "
2491 <<"size="<<data.getSize()<<std::endl);
2494 LOG(dout_con<<m_connection->getDesc()<<"BUFFERED TYPE_SPLIT"<<std::endl);
2495 throw ProcessedSilentlyException("Buffered a split packet chunk");
2498 //TODO throw some error
2501 else if((peer_id <= MAX_UDP_PEERS) && (type == TYPE_RELIABLE))
2503 assert(channel != 0);
2504 // Recursive reliable packets not allowed
2506 throw InvalidIncomingDataException("Found nested reliable packets");
2508 if(packetdata.getSize() < RELIABLE_HEADER_SIZE)
2509 throw InvalidIncomingDataException
2510 ("packetdata.getSize() < RELIABLE_HEADER_SIZE");
2512 u16 seqnum = readU16(&packetdata[1]);
2513 bool is_future_packet = false;
2514 bool is_old_packet = false;
2516 /* packet is within our receive window send ack */
2517 if (seqnum_in_window(seqnum, channel->readNextIncomingSeqNum(),MAX_RELIABLE_WINDOW_SIZE))
2519 m_connection->sendAck(peer_id,channelnum,seqnum);
2522 is_future_packet = seqnum_higher(seqnum, channel->readNextIncomingSeqNum());
2523 is_old_packet = seqnum_higher(channel->readNextIncomingSeqNum(), seqnum);
2526 /* packet is not within receive window, don't send ack. *
2527 * if this was a valid packet it's gonna be retransmitted */
2528 if (is_future_packet)
2530 throw ProcessedSilentlyException("Received packet newer then expected, not sending ack");
2533 /* seems like our ack was lost, send another one for a old packet */
2536 LOG(dout_con<<m_connection->getDesc()
2537 << "RE-SENDING ACK: peer_id: " << peer_id
2538 << ", channel: " << (channelnum&0xFF)
2539 << ", seqnum: " << seqnum << std::endl;)
2540 m_connection->sendAck(peer_id,channelnum,seqnum);
2542 // we already have this packet so this one was on wire at least
2543 // the current timeout
2544 dynamic_cast<UDPPeer*>(&peer)->reportRTT(dynamic_cast<UDPPeer*>(&peer)->getResendTimeout());
2546 throw ProcessedSilentlyException("Retransmitting ack for old packet");
2550 if (seqnum != channel->readNextIncomingSeqNum())
2552 Address peer_address;
2554 // this is a reliable packet so we have a udp address for sure
2555 peer->getAddress(MTP_MINETEST_RELIABLE_UDP, peer_address);
2556 // This one comes later, buffer it.
2557 // Actually we have to make a packet to buffer one.
2558 // Well, we have all the ingredients, so just do it.
2559 BufferedPacket packet = con::makePacket(
2562 m_connection->GetProtocolID(),
2566 channel->incoming_reliables.insert(packet,channel->readNextIncomingSeqNum());
2568 LOG(dout_con<<m_connection->getDesc()
2569 << "BUFFERING, TYPE_RELIABLE peer_id: " << peer_id
2570 << ", channel: " << (channelnum&0xFF)
2571 << ", seqnum: " << seqnum << std::endl;)
2573 throw ProcessedQueued("Buffered future reliable packet");
2575 catch(AlreadyExistsException &e)
2578 catch(IncomingDataCorruption &e)
2580 ConnectionCommand discon;
2581 discon.disconnect_peer(peer_id);
2582 m_connection->putCommand(discon);
2584 LOG(derr_con<<m_connection->getDesc()
2585 << "INVALID, TYPE_RELIABLE peer_id: " << peer_id
2586 << ", channel: " << (channelnum&0xFF)
2587 << ", seqnum: " << seqnum
2588 << "DROPPING CLIENT!" << std::endl;)
2592 /* we got a packet to process right now */
2593 LOG(dout_con<<m_connection->getDesc()
2594 << "RECURSIVE, TYPE_RELIABLE peer_id: " << peer_id
2595 << ", channel: " << (channelnum&0xFF)
2596 << ", seqnum: " << seqnum << std::endl;)
2599 /* check for resend case */
2600 u16 queued_seqnum = 0;
2601 if (channel->incoming_reliables.getFirstSeqnum(queued_seqnum))
2603 if (queued_seqnum == seqnum)
2605 BufferedPacket queued_packet = channel->incoming_reliables.popFirst();
2606 /** TODO find a way to verify the new against the old packet */
2610 channel->incNextIncomingSeqNum();
2612 // Get out the inside packet and re-process it
2613 SharedBuffer<u8> payload(packetdata.getSize() - RELIABLE_HEADER_SIZE);
2614 memcpy(*payload, &packetdata[RELIABLE_HEADER_SIZE], payload.getSize());
2616 return processPacket(channel, payload, peer_id, channelnum, true);
2620 derr_con<<m_connection->getDesc()
2621 <<"Got invalid type="<<((int)type&0xff)<<std::endl;
2622 throw InvalidIncomingDataException("Invalid packet type");
2625 // We should never get here.
2626 // If you get here, add an exception or a return to some of the
2627 // above conditionals.
2629 throw BaseException("Error in Channel::ProcessPacket()");
2636 Connection::Connection(u32 protocol_id, u32 max_packet_size, float timeout,
2642 m_protocol_id(protocol_id),
2643 m_sendThread(this, max_packet_size, timeout),
2644 m_receiveThread(this, max_packet_size),
2646 m_bc_peerhandler(0),
2647 m_bc_receive_timeout(0),
2648 m_shutting_down(false),
2649 m_next_remote_peer_id(2)
2651 m_udpSocket.setTimeoutMs(5);
2653 m_sendThread.Start();
2654 m_receiveThread.Start();
2657 Connection::Connection(u32 protocol_id, u32 max_packet_size, float timeout,
2658 bool ipv6, PeerHandler *peerhandler) :
2663 m_protocol_id(protocol_id),
2664 m_sendThread(this, max_packet_size, timeout),
2665 m_receiveThread(this, max_packet_size),
2667 m_bc_peerhandler(peerhandler),
2668 m_bc_receive_timeout(0),
2669 m_shutting_down(false),
2670 m_next_remote_peer_id(2)
2673 m_udpSocket.setTimeoutMs(5);
2675 m_sendThread.Start();
2676 m_receiveThread.Start();
2681 Connection::~Connection()
2683 m_shutting_down = true;
2684 // request threads to stop
2685 m_sendThread.Stop();
2686 m_receiveThread.Stop();
2688 //TODO for some unkonwn reason send/receive threads do not exit as they're
2689 // supposed to be but wait on peer timeout. To speed up shutdown we reduce
2690 // timeout to half a second.
2691 m_sendThread.setPeerTimeout(0.5);
2693 // wait for threads to finish
2694 m_sendThread.Wait();
2695 m_receiveThread.Wait();
2698 for(std::map<u16, Peer*>::iterator
2699 j = m_peers.begin();
2700 j != m_peers.end(); ++j)
2706 /* Internal stuff */
2707 void Connection::putEvent(ConnectionEvent &e)
2709 assert(e.type != CONNEVENT_NONE);
2710 m_event_queue.push_back(e);
2713 PeerHelper Connection::getPeer(u16 peer_id)
2715 JMutexAutoLock peerlock(m_peers_mutex);
2716 std::map<u16, Peer*>::iterator node = m_peers.find(peer_id);
2718 if(node == m_peers.end()){
2719 throw PeerNotFoundException("GetPeer: Peer not found (possible timeout)");
2723 assert(node->second->id == peer_id);
2725 return PeerHelper(node->second);
2728 PeerHelper Connection::getPeerNoEx(u16 peer_id)
2730 JMutexAutoLock peerlock(m_peers_mutex);
2731 std::map<u16, Peer*>::iterator node = m_peers.find(peer_id);
2733 if(node == m_peers.end()){
2734 return PeerHelper(NULL);
2738 assert(node->second->id == peer_id);
2740 return PeerHelper(node->second);
2743 /* find peer_id for address */
2744 u16 Connection::lookupPeer(Address& sender)
2746 JMutexAutoLock peerlock(m_peers_mutex);
2747 std::map<u16, Peer*>::iterator j;
2748 j = m_peers.begin();
2749 for(; j != m_peers.end(); ++j)
2751 Peer *peer = j->second;
2752 if(peer->isActive())
2757 if ((peer->getAddress(MTP_MINETEST_RELIABLE_UDP, tocheck)) && (tocheck == sender))
2760 if ((peer->getAddress(MTP_UDP, tocheck)) && (tocheck == sender))
2764 return PEER_ID_INEXISTENT;
2767 std::list<Peer*> Connection::getPeers()
2769 std::list<Peer*> list;
2770 for(std::map<u16, Peer*>::iterator j = m_peers.begin();
2771 j != m_peers.end(); ++j)
2773 Peer *peer = j->second;
2774 list.push_back(peer);
2779 bool Connection::deletePeer(u16 peer_id, bool timeout)
2783 /* lock list as short as possible */
2785 JMutexAutoLock peerlock(m_peers_mutex);
2786 if(m_peers.find(peer_id) == m_peers.end())
2788 peer = m_peers[peer_id];
2789 m_peers.erase(peer_id);
2792 Address peer_address;
2793 //any peer has a primary address this never fails!
2794 peer->getAddress(MTP_PRIMARY, peer_address);
2797 e.peerRemoved(peer_id, timeout, peer_address);
2807 ConnectionEvent Connection::getEvent()
2809 if(m_event_queue.empty()){
2811 e.type = CONNEVENT_NONE;
2814 return m_event_queue.pop_frontNoEx();
2817 ConnectionEvent Connection::waitEvent(u32 timeout_ms)
2820 return m_event_queue.pop_front(timeout_ms);
2821 } catch(ItemNotFoundException &ex){
2823 e.type = CONNEVENT_NONE;
2828 void Connection::putCommand(ConnectionCommand &c)
2830 if (!m_shutting_down)
2832 m_command_queue.push_back(c);
2833 m_sendThread.Trigger();
2837 void Connection::Serve(Address bind_addr)
2839 ConnectionCommand c;
2844 void Connection::Connect(Address address)
2846 ConnectionCommand c;
2851 bool Connection::Connected()
2853 JMutexAutoLock peerlock(m_peers_mutex);
2855 if(m_peers.size() != 1)
2858 std::map<u16, Peer*>::iterator node = m_peers.find(PEER_ID_SERVER);
2859 if(node == m_peers.end())
2862 if(m_peer_id == PEER_ID_INEXISTENT)
2868 void Connection::Disconnect()
2870 ConnectionCommand c;
2875 u32 Connection::Receive(u16 &peer_id, SharedBuffer<u8> &data)
2878 ConnectionEvent e = waitEvent(m_bc_receive_timeout);
2879 if(e.type != CONNEVENT_NONE)
2880 LOG(dout_con<<getDesc()<<": Receive: got event: "
2881 <<e.describe()<<std::endl);
2883 case CONNEVENT_NONE:
2884 throw NoIncomingDataException("No incoming data");
2885 case CONNEVENT_DATA_RECEIVED:
2886 peer_id = e.peer_id;
2887 data = SharedBuffer<u8>(e.data);
2888 return e.data.getSize();
2889 case CONNEVENT_PEER_ADDED: {
2890 UDPPeer tmp(e.peer_id, e.address, this);
2891 if(m_bc_peerhandler)
2892 m_bc_peerhandler->peerAdded(&tmp);
2894 case CONNEVENT_PEER_REMOVED: {
2895 UDPPeer tmp(e.peer_id, e.address, this);
2896 if(m_bc_peerhandler)
2897 m_bc_peerhandler->deletingPeer(&tmp, e.timeout);
2899 case CONNEVENT_BIND_FAILED:
2900 throw ConnectionBindFailed("Failed to bind socket "
2901 "(port already in use?)");
2904 throw NoIncomingDataException("No incoming data");
2907 void Connection::SendToAll(u8 channelnum, SharedBuffer<u8> data, bool reliable)
2909 assert(channelnum < CHANNEL_COUNT);
2911 ConnectionCommand c;
2912 c.sendToAll(channelnum, data, reliable);
2916 void Connection::Send(u16 peer_id, u8 channelnum,
2917 SharedBuffer<u8> data, bool reliable)
2919 assert(channelnum < CHANNEL_COUNT);
2921 ConnectionCommand c;
2922 c.send(peer_id, channelnum, data, reliable);
2926 Address Connection::GetPeerAddress(u16 peer_id)
2928 PeerHelper peer = getPeerNoEx(peer_id);
2931 throw PeerNotFoundException("No address for peer found!");
2932 Address peer_address;
2933 peer->getAddress(MTP_PRIMARY, peer_address);
2934 return peer_address;
2937 float Connection::getPeerStat(u16 peer_id, rtt_stat_type type)
2939 PeerHelper peer = getPeerNoEx(peer_id);
2940 if (!peer) return -1;
2941 return peer->getStat(type);
2944 float Connection::getLocalStat(rate_stat_type type)
2946 PeerHelper peer = getPeerNoEx(PEER_ID_SERVER);
2949 assert("Connection::getLocalStat we couldn't get our own peer? are you serious???" == 0);
2954 for (u16 j=0; j<CHANNEL_COUNT; j++) {
2957 retval += dynamic_cast<UDPPeer*>(&peer)->channels[j].getCurrentDownloadRateKB();
2960 retval += dynamic_cast<UDPPeer*>(&peer)->channels[j].getAvgDownloadRateKB();
2963 retval += dynamic_cast<UDPPeer*>(&peer)->channels[j].getCurrentIncomingRateKB();
2966 retval += dynamic_cast<UDPPeer*>(&peer)->channels[j].getAvgIncomingRateKB();
2969 retval += dynamic_cast<UDPPeer*>(&peer)->channels[j].getAvgLossRateKB();
2972 retval += dynamic_cast<UDPPeer*>(&peer)->channels[j].getCurrentLossRateKB();
2975 assert("Connection::getLocalStat Invalid stat type" == 0);
2981 u16 Connection::createPeer(Address& sender, MTProtocols protocol, int fd)
2983 // Somebody wants to make a new connection
2985 // Get a unique peer id (2 or higher)
2986 u16 peer_id_new = m_next_remote_peer_id;
2987 u16 overflow = MAX_UDP_PEERS;
2990 Find an unused peer id
2993 JMutexAutoLock lock(m_peers_mutex);
2994 bool out_of_ids = false;
2998 if(m_peers.find(peer_id_new) == m_peers.end())
3000 // Check for overflow
3001 if(peer_id_new == overflow){
3008 errorstream<<getDesc()<<" ran out of peer ids"<<std::endl;
3009 return PEER_ID_INEXISTENT;
3014 peer = new UDPPeer(peer_id_new, sender, this);
3016 m_peers[peer->id] = peer;
3019 m_next_remote_peer_id = (peer_id_new +1) % MAX_UDP_PEERS;
3021 LOG(dout_con<<getDesc()
3022 <<"createPeer(): giving peer_id="<<peer_id_new<<std::endl);
3024 ConnectionCommand cmd;
3025 SharedBuffer<u8> reply(4);
3026 writeU8(&reply[0], TYPE_CONTROL);
3027 writeU8(&reply[1], CONTROLTYPE_SET_PEER_ID);
3028 writeU16(&reply[2], peer_id_new);
3029 cmd.createPeer(peer_id_new,reply);
3030 this->putCommand(cmd);
3032 // Create peer addition event
3034 e.peerAdded(peer_id_new, sender);
3037 // We're now talking to a valid peer_id
3041 void Connection::PrintInfo(std::ostream &out)
3043 m_info_mutex.Lock();
3044 out<<getDesc()<<": ";
3045 m_info_mutex.Unlock();
3048 void Connection::PrintInfo()
3050 PrintInfo(dout_con);
3053 const std::string Connection::getDesc()
3055 return std::string("con(")+
3056 itos(m_udpSocket.GetHandle())+"/"+itos(m_peer_id)+")";
3059 void Connection::DisconnectPeer(u16 peer_id)
3061 ConnectionCommand discon;
3062 discon.disconnect_peer(peer_id);
3066 void Connection::sendAck(u16 peer_id, u8 channelnum, u16 seqnum)
3068 assert(channelnum < CHANNEL_COUNT);
3070 LOG(dout_con<<getDesc()
3071 <<" Queuing ACK command to peer_id: " << peer_id <<
3072 " channel: " << (channelnum & 0xFF) <<
3073 " seqnum: " << seqnum << std::endl);
3075 ConnectionCommand c;
3076 SharedBuffer<u8> ack(4);
3077 writeU8(&ack[0], TYPE_CONTROL);
3078 writeU8(&ack[1], CONTROLTYPE_ACK);
3079 writeU16(&ack[2], seqnum);
3081 c.ack(peer_id, channelnum, ack);
3083 m_sendThread.Trigger();
3086 UDPPeer* Connection::createServerPeer(Address& address)
3088 if (getPeerNoEx(PEER_ID_SERVER) != 0)
3090 throw ConnectionException("Already connected to a server");
3093 UDPPeer *peer = new UDPPeer(PEER_ID_SERVER, address, this);
3096 JMutexAutoLock lock(m_peers_mutex);
3097 m_peers[peer->id] = peer;
3103 std::list<u16> Connection::getPeerIDs()
3105 std::list<u16> retval;
3107 JMutexAutoLock lock(m_peers_mutex);
3108 for(std::map<u16, Peer*>::iterator j = m_peers.begin();
3109 j != m_peers.end(); ++j)
3111 retval.push_back(j->first);