-
Notifications
You must be signed in to change notification settings - Fork 0
/
messenger.go
934 lines (804 loc) · 25.5 KB
/
messenger.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
package messenger
import (
"context"
"fmt"
"io/ioutil"
"math/rand"
"strconv"
"strings"
"sync"
"time"
log "github.com/sirupsen/logrus"
"github.com/spf13/viper"
"github.com/ltdai010/theta/common"
"github.com/ltdai010/theta/common/util"
"github.com/ltdai010/theta/crypto"
p2ptypes "github.com/ltdai010/theta/p2p/types"
p2pcmn "github.com/ltdai010/theta/p2pl/common"
"github.com/ltdai010/theta/p2pl/peer"
"github.com/ltdai010/theta/p2pl"
"github.com/ltdai010/theta/p2pl/transport"
"github.com/libp2p/go-libp2p"
"github.com/libp2p/go-libp2p-core/host"
"github.com/libp2p/go-libp2p-core/network"
connmgr "github.com/libp2p/go-libp2p-connmgr"
pr "github.com/libp2p/go-libp2p-core/peer"
"github.com/libp2p/go-libp2p-core/protocol"
cr "github.com/libp2p/go-libp2p-crypto"
peerstore "github.com/libp2p/go-libp2p-peerstore"
kaddht "github.com/libp2p/go-libp2p-kad-dht"
dhtopts "github.com/libp2p/go-libp2p-kad-dht/opts"
ps "github.com/libp2p/go-libp2p-pubsub"
rhost "github.com/libp2p/go-libp2p/p2p/host/routed"
// "github.com/libp2p/go-libp2p/p2p/discovery"
ds "github.com/ipfs/go-datastore"
dsync "github.com/ipfs/go-datastore/sync"
ma "github.com/multiformats/go-multiaddr"
)
var logger *log.Entry = log.WithFields(log.Fields{"prefix": "p2pl"})
//
// Messenger implements the Network interface
//
var _ p2pl.Network = (*Messenger)(nil)
const (
// thetaP2PProtocolPrefix = "/theta/1.0.0/"
defaultPeerDiscoveryPulseInterval = 10 * time.Second
connectInterval = 1000 // 1 sec
lowConnectivityCheckInterval = 60
highConnectivityCheckInterval = 10
)
type Messenger struct {
host host.Host
msgHandlerMap map[common.ChannelIDEnum](p2pl.MessageHandler)
config MessengerConfig
seedPeers map[pr.ID]*pr.AddrInfo
pubsub *ps.PubSub
dht *kaddht.IpfsDHT
needMdns bool
seedPeerOnly bool
peerTable *peer.PeerTable
newPeers chan pr.ID
peerDead chan pr.ID
newPeerError chan pr.ID
protocolPrefix string
msgBlockBufferPool chan []byte
msgNormalBufferPool chan []byte
// Stats.
statsEnabled bool
statsLock sync.Mutex
statsCounter map[common.ChannelIDEnum]uint64
// Life cycle
wg *sync.WaitGroup
quit chan struct{}
ctx context.Context
cancel context.CancelFunc
stopped bool
}
//
// MessengerConfig specifies the configuration for Messenger
//
type MessengerConfig struct {
networkProtocol string
}
// GetDefaultMessengerConfig returns the default config for messenger, not necessary
func GetDefaultMessengerConfig() MessengerConfig {
return MessengerConfig{
networkProtocol: "tcp",
}
}
func createP2PAddr(ip, port, networkProtocol string) (ma.Multiaddr, error) {
ipv := "ip4"
if strings.Index(ip, ":") > 0 {
ipv = "ip6"
}
multiAddr, err := ma.NewMultiaddr(fmt.Sprintf("/%v/%v/%v/%v", ipv, ip, networkProtocol, port))
if err != nil {
return nil, err
}
return multiAddr, nil
}
// ID returns the ID of the current node
func (msgr *Messenger) ID() string {
//return string(msgr.host.ID())
return msgr.host.ID().Pretty()
}
// CreateMessenger creates an instance of Messenger
func CreateMessenger(pubKey *crypto.PublicKey, seedPeerMultiAddresses []string,
port int, seedPeerOnly bool, msgrConfig MessengerConfig, needMdns bool, ctx context.Context) (*Messenger, error) {
ctx, cancel := context.WithCancel(ctx)
pt := peer.CreatePeerTable()
bufferPoolSize := viper.GetInt(common.CfgBufferPoolSize)
var protocolPrefix string
if viper.GetString(common.CfgP2PProtocolPrefix) != "" {
protocolPrefix = viper.GetString(common.CfgP2PProtocolPrefix)
} else {
protocolPrefix = "/theta/" + viper.GetString(common.CfgGenesisChainID) + "/" + viper.GetString(common.CfgP2PVersion) + "/"
}
messenger := &Messenger{
peerTable: &pt,
newPeers: make(chan pr.ID),
peerDead: make(chan pr.ID),
newPeerError: make(chan pr.ID),
msgBlockBufferPool: make(chan []byte, bufferPoolSize),
msgNormalBufferPool: make(chan []byte, bufferPoolSize),
msgHandlerMap: make(map[common.ChannelIDEnum](p2pl.MessageHandler)),
needMdns: needMdns,
seedPeerOnly: seedPeerOnly,
seedPeers: make(map[pr.ID]*pr.AddrInfo),
protocolPrefix: protocolPrefix,
config: msgrConfig,
statsCounter: make(map[common.ChannelIDEnum]uint64),
wg: &sync.WaitGroup{},
ctx: ctx,
}
for i := 0; i < bufferPoolSize; i++ {
messenger.msgBlockBufferPool <- make([]byte, p2pcmn.MaxBlockMessageSize)
messenger.msgNormalBufferPool <- make([]byte, p2pcmn.MaxNormalMessageSize)
}
hostId, _, err := cr.GenerateEd25519Key(strings.NewReader(common.Bytes2Hex(pubKey.ToBytes())))
if err != nil {
return messenger, err
}
localNetAddress, err := createP2PAddr("0.0.0.0", strconv.Itoa(port), msgrConfig.networkProtocol)
if err != nil {
return messenger, err
}
var extMultiAddr ma.Multiaddr
if !seedPeerOnly {
externalIP, err := util.GetPublicIP()
if err != nil {
logger.Warnf("Cannot to get the node's external IP address, use 0.0.0.0: %v", err)
externalIP = "0.0.0.0"
//return messenger, err
}
extMultiAddr, err = createP2PAddr(externalIP, strconv.Itoa(port), msgrConfig.networkProtocol)
if err != nil {
return messenger, err
}
}
addressFactory := func(addrs []ma.Multiaddr) []ma.Multiaddr {
if extMultiAddr != nil {
addrs = append(addrs, extMultiAddr)
}
return addrs
}
minNumPeers := viper.GetInt(common.CfgP2PMinNumPeers)
maxNumPeers := viper.GetInt(common.CfgP2PMaxNumPeers)
cm := connmgr.NewConnManager(minNumPeers, maxNumPeers, defaultPeerDiscoveryPulseInterval)
host, err := libp2p.New(
ctx,
libp2p.EnableRelay(),
libp2p.Identity(hostId),
libp2p.ListenAddrs([]ma.Multiaddr{localNetAddress}...),
libp2p.AddrsFactory(addressFactory),
libp2p.ConnectionManager(cm),
)
if err != nil {
cancel()
return messenger, err
}
messenger.host = host
// seeds
for _, seedPeerMultiAddrStr := range seedPeerMultiAddresses {
addr, err := ma.NewMultiaddr(seedPeerMultiAddrStr)
if err != nil {
cancel()
return messenger, err
}
peer, err := peerstore.InfoFromP2pAddr(addr)
if err != nil {
cancel()
return messenger, err
}
messenger.seedPeers[peer.ID] = peer
}
if !seedPeerOnly {
// kad-dht
dopts := []dhtopts.Option{
dhtopts.Datastore(dsync.MutexWrap(ds.NewMapDatastore())),
dhtopts.Protocols(
protocol.ID(messenger.protocolPrefix + "dht"),
),
}
dht, err := kaddht.New(ctx, host, dopts...)
if err != nil {
cancel()
return messenger, err
}
host = rhost.Wrap(host, dht)
messenger.dht = dht
}
// pubsub
psOpts := []ps.Option{
ps.WithMessageSigning(false),
ps.WithStrictSignatureVerification(false),
}
pubsub, err := ps.NewGossipSub(ctx, host, psOpts...)
if err != nil {
cancel()
return messenger, err
}
messenger.pubsub = pubsub
host.Network().Notify((*PeerNotif)(messenger))
logger.Infof("Created node %v, %v, seedPeerOnly: %v", host.ID(), host.Addrs(), seedPeerOnly)
return messenger, nil
}
func (msgr *Messenger) isSeedPeer(pid pr.ID) bool {
_, isSeed := msgr.seedPeers[pid]
return isSeed
}
func (msgr *Messenger) processLoop(ctx context.Context) {
defer func() {
// Clean up go routines.
allPeers := msgr.peerTable.GetAllPeers()
for _, peer := range *allPeers {
peer.Stop()
msgr.peerTable.DeletePeer(peer.ID())
}
msgr.cancel()
}()
for {
select {
case pid := <-msgr.newPeers:
if msgr.peerTable.PeerExists(pid) {
continue
}
if msgr.seedPeerOnly {
if !msgr.isSeedPeer(pid) {
msgr.host.Network().ClosePeer(pid)
// msgr.host.Peerstore().UpdateAddrs(pid, peerstore.ConnectedAddrTTL, time.Duration(1 * time.Millisecond))
continue
}
}
if int(msgr.peerTable.GetTotalNumPeers()) >= viper.GetInt(common.CfgP2PMaxNumPeers) {
msgr.host.Network().ClosePeer(pid)
continue
}
pr := msgr.host.Peerstore().PeerInfo(pid)
if pr.ID == "" {
continue
}
isOutbound := strings.Compare(msgr.host.ID().String(), pid.String()) > 0
peer := peer.CreatePeer(pr, isOutbound)
msgr.peerTable.AddPeer(peer)
msgr.attachHandlersToPeer(peer)
peer.Start(msgr.ctx)
peer.OpenStreams()
logger.Infof("Peer connected, id: %v, addrs: %v", pr.ID, pr.Addrs)
case pid := <-msgr.newPeerError:
peer := msgr.peerTable.GetPeer(pid)
if peer == nil {
continue
}
peer.Stop()
msgr.peerTable.DeletePeer(pid)
msgr.host.Network().ClosePeer(pid)
case pid := <-msgr.peerDead:
peer := msgr.peerTable.GetPeer(pid)
if peer == nil {
continue
}
if msgr.host.Network().Connectedness(pid) == network.Connected {
// still connected, must be a duplicate connection being closed.
// we respawn the writer as we need to ensure there is a stream active
logger.Warnf("peer declared dead but still connected, should be a duplicated connection: %v", pid)
continue
}
peer.Stop()
msgr.peerTable.DeletePeer(pid)
logger.Infof("Peer disconnected, id: %v, addrs: %v", peer.ID(), peer.Addrs())
case <-ctx.Done():
log.Debug("messenger processloop shutting down")
return
}
}
}
func (msgr *Messenger) maintainConnectivityRoutine(ctx context.Context) {
var seedsConnectivityCheckPulse, sufficientConnectionsCheckPulse *time.Ticker
if msgr.seedPeerOnly {
seedsConnectivityCheckPulse = time.NewTicker(highConnectivityCheckInterval * time.Second)
} else {
seedsConnectivityCheckPulse = time.NewTicker(lowConnectivityCheckInterval * time.Second)
}
sufficientConnectionsCheckPulse = time.NewTicker(lowConnectivityCheckInterval * time.Second)
for {
select {
case <-seedsConnectivityCheckPulse.C:
msgr.maintainSeedsConnectivity(ctx)
case <-sufficientConnectionsCheckPulse.C:
msgr.maintainSufficientConnections(ctx)
}
}
}
func (msgr *Messenger) maintainSeedsConnectivity(ctx context.Context) {
if !msgr.seedPeerOnly {
for _, pid := range *(msgr.peerTable.GetAllPeerIDs()) {
if msgr.isSeedPeer(pid) {
// don't proceed if there's at least one seed in peer table
return
}
}
}
seedPeers := make([]*pr.AddrInfo, 0, len(msgr.seedPeers))
for _, seedPeer := range msgr.seedPeers {
seedPeers = append(seedPeers, seedPeer)
}
perm := rand.Perm(len(seedPeers))
for _, idx := range perm {
time.Sleep(time.Duration(rand.Int63n(connectInterval)) * time.Millisecond)
seedPeer := seedPeers[idx]
peer := msgr.peerTable.GetPeer(seedPeer.ID)
if peer == nil { // if peer is not in peer table, then connect
msgr.wg.Add(1)
go func() {
defer msgr.wg.Done()
err := msgr.host.Connect(ctx, *seedPeer)
if err == nil {
logger.Infof("Successfully re-connected to seed peer: %v", seedPeer)
} else {
logger.Warnf("Failed to re-connect to seed peer %v, %v", seedPeer, err)
}
}()
}
if !msgr.seedPeerOnly {
break // if not seed peer only, sufficient to have at least one connection
}
}
}
func (msgr *Messenger) maintainSufficientConnections(ctx context.Context) {
diff := viper.GetInt(common.CfgP2PMinNumPeers) - int(msgr.peerTable.GetTotalNumPeers())
if diff > 0 {
var connections []*pr.AddrInfo
for _, seed := range msgr.seedPeers {
if !msgr.peerTable.PeerExists(seed.ID) {
connections = append(connections, seed)
}
}
if !msgr.seedPeerOnly {
prevPeers, err := msgr.peerTable.RetrievePreviousPeers()
if err == nil {
for _, prevPeer := range prevPeers {
if msgr.peerTable.PeerExists(prevPeer.ID) {
continue
}
exists := false
for _, seed := range connections {
if seed.ID == prevPeer.ID {
exists = true
break
}
}
if !exists {
connections = append(connections, prevPeer)
}
}
}
}
if len(connections) > 0 {
perm := rand.Perm(len(connections))
msgr.wg.Add(1)
go func(i int) {
defer msgr.wg.Done()
j := perm[i]
peer := connections[j]
err := msgr.host.Connect(ctx, *peer)
if err == nil {
logger.Infof("Successfully re-connected to peer: %v", peer)
} else {
logger.Warnf("Failed to re-connect to peer %v, %v", peer, err)
}
}(perm[0])
}
}
}
// Start is called when the Messenger starts
func (msgr *Messenger) Start(ctx context.Context) error {
c, cancel := context.WithCancel(ctx)
msgr.ctx = c
msgr.cancel = cancel
// seeds & previously persisted peers
connections := make([]*pr.AddrInfo, 0)
for _, seed := range msgr.seedPeers {
connections = append(connections, seed)
}
if !msgr.seedPeerOnly {
prevPeers, err := msgr.peerTable.RetrievePreviousPeers()
if err == nil {
for _, prevPeer := range prevPeers {
exists := false
for _, seed := range connections {
if seed.ID == prevPeer.ID {
exists = true
break
}
}
if !exists {
connections = append(connections, prevPeer)
}
}
}
}
logger.Infof("Connecting to: %v", connections)
perm := rand.Perm(len(connections))
for i := 0; i < len(perm); i++ { // create outbound peers in a random order
time.Sleep(time.Duration(rand.Int63n(connectInterval)) * time.Millisecond)
msgr.wg.Add(1)
go func(i int) {
defer msgr.wg.Done()
j := perm[i]
seedPeer := connections[j]
err := msgr.host.Connect(ctx, *seedPeer)
if err != nil {
logger.Warnf("Failed to connect to peer %v: %v. connectedness: %v", seedPeer, err, msgr.host.Network().Connectedness(seedPeer.ID))
}
}(i)
}
// kad-dht
if msgr.dht != nil {
bcfg := kaddht.DefaultBootstrapConfig
bcfg.Period = time.Duration(defaultPeerDiscoveryPulseInterval)
if err := msgr.dht.BootstrapWithConfig(ctx, bcfg); err != nil {
logger.Errorf("Failed to bootstrap DHT: %v", err)
}
}
// // mDns
// if msgr.needMdns {
// mdnsService, err := discovery.NewMdnsService(ctx, msgr.host, defaultPeerDiscoveryPulseInterval, viper.GetString(common.CfgLibP2PRendezvous))
// if err != nil {
// return err
// }
// mdnsService.RegisterNotifee(&discoveryNotifee{ctx, msgr.host})
// }
go msgr.processLoop(ctx)
go msgr.maintainConnectivityRoutine(ctx)
msgr.statsEnabled = viper.GetBool(common.CfgProfEnabled)
if msgr.statsEnabled {
go func() {
t := time.NewTicker(3 * time.Second)
for {
<-t.C
msgr.printStats()
}
}()
}
return nil
}
// Stop is called when the Messenger stops
func (msgr *Messenger) Stop() {
if msgr.host.Peerstore() != nil && msgr.host.Peerstore().Peers() != nil {
for _, pid := range msgr.host.Peerstore().Peers() {
msgr.host.Network().ClosePeer(pid)
}
}
msgr.cancel()
logger.Infof("Messenger shut down %v", msgr.host.ID())
}
// Wait suspends the caller goroutine
func (msgr *Messenger) Wait() {
msgr.wg.Wait()
}
// Publish publishes the given message to all the subscribers
func (msgr *Messenger) Publish(message p2ptypes.Message) error {
logger.Debugf("Publishing messages...")
msgHandler := msgr.msgHandlerMap[message.ChannelID]
bytes, err := msgHandler.EncodeMessage(message.Content)
if err != nil {
logger.Errorf("Encoding error: %v", err)
return err
}
err = msgr.pubsub.Publish(msgr.protocolPrefix+strconv.Itoa(int(message.ChannelID)), bytes)
if err != nil {
log.Errorf("Failed to publish to gossipsub topic: %v", err)
return err
}
return nil
}
// Broadcast broadcasts the given message to all the connected peers
func (msgr *Messenger) Broadcast(message p2ptypes.Message) (successes chan bool) {
logger.Debugf("Broadcasting messages...")
msgr.Publish(message)
return make(chan bool)
}
// BroadcastToNeighbors broadcasts the given message to neighbors
func (msgr *Messenger) BroadcastToNeighbors(message p2ptypes.Message, maxNumPeersToBroadcast int) (successes chan bool) {
sampledPIDs := msgr.samplePeers(maxNumPeersToBroadcast)
for _, pid := range sampledPIDs {
go func(pid string) {
msgr.Send(pid, message)
}(pid)
}
return make(chan bool)
}
// samplePeers randomly sample a subset of peers
func (msgr *Messenger) samplePeers(maxNumSampledPeers int) []string {
// Prioritize seed peers
sampledPIDs, idx := []string{}, 0
for seedPID := range msgr.seedPeers {
// Note: the order of map loop-through is undeterminstic, which effectively shuffles the seed peers
sampledPIDs = append(sampledPIDs, seedPID.String())
idx++
if idx >= maxNumSampledPeers {
return sampledPIDs
}
}
// Randomly sample the remaining peers
neighbors := *msgr.peerTable.GetAllPeers()
neighborPIDs := []string{}
for _, peer := range neighbors {
pid := peer.ID()
if pid == msgr.host.ID() || msgr.isSeedPeer(pid) {
continue
}
neighborPIDs = append(neighborPIDs, pid.String())
}
numPeersToSample := maxNumSampledPeers - len(msgr.seedPeers) // numPeersToSample is guaranteed > 0
sampledNeighbors := util.Sample(neighborPIDs, numPeersToSample)
if numPeersToSample >= len(sampledNeighbors) {
numPeersToSample = len(sampledNeighbors)
}
for i := 0; i < numPeersToSample; i++ {
sampledPIDs = append(sampledPIDs, sampledNeighbors[i])
}
return sampledPIDs
}
// Send sends the given message to the specified peer
func (msgr *Messenger) Send(peerID string, message p2ptypes.Message) bool {
prID, err := pr.IDB58Decode(peerID)
if err != nil {
return false
}
peer := msgr.peerTable.GetPeer(prID)
if peer == nil {
return false
}
success := peer.Send(message.ChannelID, message.Content)
return success
}
// Peers returns the IDs of all peers
func (msgr *Messenger) Peers() []string {
allPeers := msgr.peerTable.GetAllPeers()
peerIDs := []string{}
for _, peer := range *allPeers {
peerID := peer.ID().Pretty()
peerIDs = append(peerIDs, peerID)
}
return peerIDs
}
// PeerExists indicates if the given peerID is a neighboring peer
func (msgr *Messenger) PeerExists(peerID string) bool {
prID, err := pr.IDB58Decode(peerID)
if err != nil {
return false
}
return msgr.peerTable.PeerExists(prID)
}
func (msgr *Messenger) recordReceivedBytes(cid common.ChannelIDEnum, size int) {
if !msgr.statsEnabled {
return
}
msgr.statsLock.Lock()
defer msgr.statsLock.Unlock()
old, ok := msgr.statsCounter[cid]
if ok {
msgr.statsCounter[cid] = old + uint64(size)
} else {
msgr.statsCounter[cid] = uint64(size)
}
}
func (msgr *Messenger) printStats() {
msgr.statsLock.Lock()
defer msgr.statsLock.Unlock()
ret := "Received bytes:"
for k := byte(0); k <= byte(common.ChannelIDGuardian); k++ {
v, ok := msgr.statsCounter[common.ChannelIDEnum(k)]
if !ok {
continue
}
ret += fmt.Sprintf(" channel %v: %.3f MB\t", k, util.BToMb(v))
}
logger.Debug(ret)
}
// RegisterMessageHandler registers the message handler
func (msgr *Messenger) RegisterMessageHandler(msgHandler p2pl.MessageHandler) {
channelIDs := msgHandler.GetChannelIDs()
for _, channelID := range channelIDs {
if msgr.msgHandlerMap[channelID] != nil {
logger.Errorf("Message handler is already added for channelID: %v", channelID)
return
}
msgr.msgHandlerMap[channelID] = msgHandler
msgr.registerStreamHandler(channelID)
sub, err := msgr.pubsub.Subscribe(msgr.protocolPrefix + strconv.Itoa(int(channelID)))
if err != nil {
logger.Errorf("Failed to subscribe to channel %v, %v", channelID, err)
continue
}
go func(channelID common.ChannelIDEnum) {
defer sub.Cancel()
var msg *ps.Message
var err error
for {
msg, err = sub.Next(context.Background())
if msgr.ctx != nil && msgr.ctx.Err() != nil {
logger.Errorf("Context error %v", msgr.ctx.Err())
return
}
if err != nil {
logger.Errorf("Failed to get next message: %v", err)
continue
}
if msg == nil || msg.GetFrom() == msgr.host.ID() {
continue
}
message, err := msgHandler.ParseMessage(msg.GetFrom().String(), channelID, msg.Data)
if err != nil {
logger.Errorf("Failed to parse message, %v", err)
return
}
msgr.recordReceivedBytes(channelID, len(msg.Data))
msgHandler.HandleMessage(message)
}
}(channelID)
}
}
func (msgr *Messenger) registerStreamHandler(channelID common.ChannelIDEnum) {
logger.Debugf("Registered stream handler for channel %v", channelID)
msgr.host.SetStreamHandler(protocol.ID(msgr.protocolPrefix+strconv.Itoa(int(channelID))), func(strm network.Stream) {
peerID := strm.Conn().RemotePeer()
if msgr.seedPeerOnly {
if !msgr.isSeedPeer(peerID) {
msgr.host.Network().ClosePeer(peerID)
return
}
}
if strings.Compare(msgr.host.ID().String(), peerID.String()) > 0 {
logger.Warnf("Received stream from an outbound peer")
return
}
remotePeer := msgr.peerTable.GetPeer(peerID)
if remotePeer == nil {
var addrInfo pr.AddrInfo
addrInfo.ID = peerID
addrInfo.Addrs = append(addrInfo.Addrs, strm.Conn().RemoteMultiaddr())
remotePeer = peer.CreatePeer(addrInfo, true)
msgr.peerTable.AddPeer(remotePeer)
msgr.attachHandlersToPeer(remotePeer)
remotePeer.Start(msgr.ctx)
logger.Infof("Peer connected (via stream), id: %v, addrs: %v", remotePeer.ID, remotePeer.Addrs)
}
reuseStream := viper.GetBool(common.CfgP2PReuseStream)
if reuseStream {
errorHandler := func(interface{}) {
remotePeer.StopStream(channelID)
}
stream := transport.NewBufferedStream(strm, errorHandler)
stream.Start(msgr.ctx)
go msgr.readPeerMessageRoutine(stream, peerID.String(), channelID)
remotePeer.AcceptStream(channelID, stream)
} else {
rawPeerMsg, err := ioutil.ReadAll(strm)
if err != nil {
logger.Warnf("Failed to read stream, %v. channel: %v, peer: %v", err, channelID, peerID)
return
}
msgHandler := msgr.msgHandlerMap[channelID]
message, err := msgHandler.ParseMessage(peerID.String(), channelID, rawPeerMsg)
if err != nil {
logger.Errorf("Failed to parse message, %v. len(): %v, channel: %v, peer: %v, msg: %v", err, len(rawPeerMsg), channelID, peerID, rawPeerMsg)
return
}
msgr.recordReceivedBytes(channelID, len(rawPeerMsg))
msgHandler.HandleMessage(message)
}
})
}
func (msgr *Messenger) readPeerMessageRoutine(stream *transport.BufferedStream, peerID string, channelID common.ChannelIDEnum) {
defer stream.Stop()
for {
if msgr.ctx != nil {
select {
case <-msgr.ctx.Done():
return
default:
}
}
var msgBuffer []byte
var bufferSize int
var bufferPool chan []byte
if channelID == common.ChannelIDBlock || channelID == common.ChannelIDProposal {
bufferSize = p2pcmn.MaxBlockMessageSize
bufferPool = msgr.msgBlockBufferPool
} else {
bufferSize = p2pcmn.MaxNormalMessageSize
bufferPool = msgr.msgNormalBufferPool
}
msgBuffer, msgSize, err := stream.Read(bufferPool)
if err != nil {
logger.Warnf("Failed to read stream: %v", err)
if msgBuffer != nil {
bufferPool <- msgBuffer
}
return
}
if msgBuffer == nil {
// Should not happen
logger.Panic("msgBuffer cannot be nil")
}
if msgSize > bufferSize {
logger.Errorf("Message ignored since it exceeds the peer message size limit, size: %v", msgSize)
bufferPool <- msgBuffer
continue
}
rawPeerMsg := msgBuffer[:msgSize]
msgHandler := msgr.msgHandlerMap[channelID]
message, err := msgHandler.ParseMessage(peerID, channelID, rawPeerMsg)
bufferPool <- msgBuffer
if err != nil {
logger.Errorf("Failed to parse message, %v. msgSize: %v, len(): %v, channel: %v, peer: %v, msg: %v", err, msgSize, len(rawPeerMsg), channelID, peerID, rawPeerMsg)
return
}
msgr.recordReceivedBytes(channelID, len(rawPeerMsg))
msgHandler.HandleMessage(message)
}
}
// attachHandlersToPeer attaches the registerred message/stream handlers to the given peer
func (msgr *Messenger) attachHandlersToPeer(peer *peer.Peer) {
messageParser := func(channelID common.ChannelIDEnum, rawMessageBytes common.Bytes) (p2ptypes.Message, error) {
peerID := peer.ID()
msgHandler := msgr.msgHandlerMap[channelID]
if msgHandler == nil {
logger.Errorf("Failed to setup message parser for channelID %v", channelID)
}
message, err := msgHandler.ParseMessage(peerID.String(), channelID, rawMessageBytes)
msgr.recordReceivedBytes(channelID, len(rawMessageBytes))
return message, err
}
peer.SetMessageParser(messageParser)
messageEncoder := func(channelID common.ChannelIDEnum, message interface{}) (common.Bytes, error) {
msgHandler := msgr.msgHandlerMap[channelID]
return msgHandler.EncodeMessage(message)
}
peer.SetMessageEncoder(messageEncoder)
receiveHandler := func(message p2ptypes.Message) error {
channelID := message.ChannelID
msgHandler := msgr.msgHandlerMap[channelID]
if msgHandler == nil {
logger.Errorf("Failed to setup message handler for peer %v on channelID %v", message.PeerID, channelID)
}
err := msgHandler.HandleMessage(message)
return err
}
peer.SetReceiveHandler(receiveHandler)
streamCreator := func(channelID common.ChannelIDEnum) (*transport.BufferedStream, error) {
strm, err := msgr.host.NewStream(msgr.ctx, peer.ID(), protocol.ID(msgr.protocolPrefix+strconv.Itoa(int(channelID))))
if err != nil {
logger.Debugf("Stream open failed: %v. peer: %v, addrs: %v", err, peer.ID(), peer.Addrs())
return nil, err
}
if strm == nil {
logger.Errorf("Can't open stream. peer: %v, addrs: %v", peer.ID(), peer.Addrs())
return nil, nil
}
errorHandler := func(interface{}) {
peer.StopStream(channelID)
}
stream := transport.NewBufferedStream(strm, errorHandler)
stream.Start(msgr.ctx)
go msgr.readPeerMessageRoutine(stream, peer.ID().String(), channelID)
return stream, nil
}
peer.SetStreamCreator(streamCreator)
rawStreamCreator := func(channelID common.ChannelIDEnum) (network.Stream, error) {
stream, err := msgr.host.NewStream(msgr.ctx, peer.ID(), protocol.ID(msgr.protocolPrefix+strconv.Itoa(int(channelID))))
if err != nil {
logger.Debugf("Stream open failed: %v. peer: %v, addrs: %v", err, peer.ID(), peer.Addrs())
return nil, err
}
if stream == nil {
logger.Errorf("Can't open stream. peer: %v, addrs: %v", peer.ID(), peer.Addrs())
return nil, nil
}
return stream, nil
}
peer.SetRawStreamCreator(rawStreamCreator)
}