forked from gitter-badger/go-vnt
/
server.go
517 lines (428 loc) · 12.4 KB
/
server.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
// Copyright 2019 The go-vnt Authors
// This file is part of the go-vnt library.
//
// The go-vnt library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-vnt library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-vnt library. If not, see <http://www.gnu.org/licenses/>.
package vntp2p
import (
"context"
"crypto/ecdsa"
"errors"
"fmt"
"net"
"sync"
libp2p "github.com/libp2p/go-libp2p"
p2phost "github.com/libp2p/go-libp2p-host"
inet "github.com/libp2p/go-libp2p-net"
protocol "github.com/libp2p/go-libp2p-protocol"
"github.com/vntchain/go-vnt/event"
"github.com/vntchain/go-vnt/log"
// inet "github.com/libp2p/go-libp2p-net"
peer "github.com/libp2p/go-libp2p-peer"
peerstore "github.com/libp2p/go-libp2p-peerstore"
ma "github.com/multiformats/go-multiaddr"
// kb "github.com/libp2p/go-libp2p-kbucket"
)
const (
maxActiveDialTasks = 16
defaultDialRatio = 3
)
var errServerStopped = errors.New("server stopped")
type dialFlag int
const (
dynDialedDail dialFlag = 1 << iota
staticDialedDail
)
type Config struct {
PrivateKey *ecdsa.PrivateKey `toml:"-"`
MaxPeers int
MaxPendingPeers int `toml:",omitempty"`
DialRatio int `toml:",omitempty"`
NoDiscovery bool
Name string `toml:"-"`
BootstrapNodes []*Node
StaticNodes []*Node
TrustedNodes []*Node
NetRestrict []*net.IPNet `toml:",omitempty"`
NodeDatabase string `toml:",omitempty"`
Protocols []Protocol `toml:"-"`
ListenAddr string
NAT libp2p.Option `toml:"-"`
// Dialer NodeDialer `toml:"-"`
// NoDial bool `toml:",omitempty"`
EnableMsgEvents bool
Logger log.Logger `toml:",omitempty"`
}
type Server struct {
Config
table DhtTable
host p2phost.Host
running bool
peerFeed event.Feed
loopWG sync.WaitGroup
cancel context.CancelFunc
lock sync.Mutex
quit chan struct{}
addstatic chan *Node
removestatic chan *Node
addpeer chan *Stream
delpeer chan peerDrop
peerOp chan peerOpFunc
peerOpDone chan struct{}
protomap map[string][]Protocol
}
type peerOpFunc func(map[peer.ID]*Peer)
// func NewServer() (*Server, error) {
// return newServer()
// }
// func newServer() (*Server, error) {
// return &Server{}, nil
// }
type peerDrop struct {
*Peer
err error
requested bool // true if signaled by the peer
}
// close server.quit to broadcast the server shutdown
func (server *Server) Close() {
log.Info("P2P server is being closed...")
close(server.quit)
}
func (server *Server) Start() error {
log.Trace("P2P server starting...", "protocols", server.Protocols)
if server.running {
return errors.New("server already running")
}
server.lock.Lock()
defer server.lock.Unlock()
server.addpeer = make(chan *Stream)
server.delpeer = make(chan peerDrop)
server.addstatic = make(chan *Node)
server.removestatic = make(chan *Node)
server.quit = make(chan struct{})
server.peerOp = make(chan peerOpFunc)
server.peerOpDone = make(chan struct{})
// 协议映射初始化
server.protomap = make(map[string][]Protocol)
server.protomap[PID] = server.Protocols
// Listen
// run
if server.ListenAddr == "" {
return fmt.Errorf("P2P Server can't start for no listening")
}
listenPort := server.Config.ListenAddr[1:]
ctx, cancel := context.WithCancel(context.Background())
server.cancel = cancel
d := server.NodeDatabase
vdht, host, err := ConstructDHT(ctx, MakePort(listenPort), nil, d, server.Config.NetRestrict, server.Config.NAT)
if err != nil {
log.Error("ConstructDHT failed", "error", err)
return err
}
// setStreamHandler can only handle request message
// it can not hear response
host.SetStreamHandler(PID, server.HandleStream)
server.table = NewDHTTable(vdht, host.ID())
server.host = host
bootnodes := server.LoadConfig(ctx)
maxdials := server.maxDialedConns()
taskState := newTaskState(maxdials, bootnodes, server.table)
server.loopWG.Add(1)
go server.run(ctx, taskState)
server.running = true
return nil
}
func (server *Server) LoadConfig(ctx context.Context) []peer.ID {
// 创建初始连接
bootnodes := []peer.ID{}
for _, bootnode := range server.Config.BootstrapNodes {
server.host.Peerstore().AddAddrs(bootnode.Id, []ma.Multiaddr{bootnode.Addr}, peerstore.PermanentAddrTTL)
_ = server.table.Update(ctx, bootnode.Id)
bootnodes = append(bootnodes, bootnode.Id)
}
return bootnodes
}
func (server *Server) run(ctx context.Context, tasker taskworker) {
defer server.loopWG.Done()
_ = server.table.Start(ctx)
var (
runningTasks []task
queuedTasks []task
taskdone = make(chan task, maxActiveDialTasks)
peers = make(map[peer.ID]*Peer)
)
delTask := func(t task) {
for i := range runningTasks {
if runningTasks[i] == t {
runningTasks = append(runningTasks[:i], runningTasks[i+1:]...)
break
}
}
}
startTasks := func(ts []task) (rest []task) {
i := 0
for ; len(runningTasks) < maxActiveDialTasks && i < len(ts); i++ {
t := ts[i]
go func() { t.Do(ctx, server); taskdone <- t }()
runningTasks = append(runningTasks, t)
}
return ts[i:]
}
scheduleTasks := func() {
queuedTasks = append(queuedTasks[:0], startTasks(queuedTasks)...)
if len(runningTasks) < maxActiveDialTasks {
// fmt.Println("begin new task")
nt := tasker.newTasks(peers)
queuedTasks = append(queuedTasks, startTasks(nt)...)
}
}
for {
scheduleTasks()
select {
case t := <-taskdone:
tasker.taskDone(t)
delTask(t)
case t := <-server.addpeer:
remoteID := t.stream.Conn().RemotePeer()
log.Debug("Adding peer", "peer id", remoteID)
if p, ok := peers[remoteID]; ok {
p.log.Debug("Already exist peer")
break
}
p := newPeer(t, server)
if server.EnableMsgEvents {
p.events = &server.peerFeed
}
go server.runPeer(p)
peers[p.RemoteID()] = p
p.log.Debug("Added peer", "peers", peers)
case t := <-server.addstatic:
log.Debug("Adding static", "peer id", t.Id)
tasker.addStatic(t)
log.Debug("Added static", "peer id", t.Id)
case t := <-server.removestatic:
tasker.removeStatic(t)
if p, ok := peers[t.Id]; ok {
p.Disconnect(DiscRequested)
}
case op := <-server.peerOp:
// This channel is used by Peers and PeerCount.
op(peers)
server.peerOpDone <- struct{}{}
case pd := <-server.delpeer:
// A peer disconnected.
pid := pd.RemoteID()
log.Info("Removing p2p peer", "peer", pid.ToString(), "error", pd.err)
if _, ok := peers[pid]; ok {
delete(peers, pid)
}
}
}
}
func (server *Server) Stop() {
log.Info("Server is Stopping!")
defer server.cancel()
}
func (server *Server) AddPeer(ctx context.Context, node *Node) {
server.host.Peerstore().AddAddrs(node.Id, []ma.Multiaddr{node.Addr}, peerstore.PermanentAddrTTL)
_ = server.table.Update(ctx, node.Id)
select {
case <-server.quit:
case server.addstatic <- node:
}
}
func (server *Server) RemovePeer(node *Node) {
select {
case <-server.quit:
case server.removestatic <- node:
}
}
func (server *Server) SubscribeEvents(ch chan *PeerEvent) event.Subscription {
return server.peerFeed.Subscribe(ch)
}
func (server *Server) PeersInfo() []*PeerInfo {
infos := make([]*PeerInfo, 0, server.PeerCount())
for _, peer := range server.Peers() {
if peer != nil {
infos = append(infos, peer.Info())
}
}
for i := 0; i < len(infos); i++ {
for j := i + 1; j < len(infos); j++ {
if infos[i].ID > infos[j].ID {
infos[i], infos[j] = infos[j], infos[i]
}
}
}
return infos
}
func (server *Server) Self() *Node {
server.lock.Lock()
defer server.lock.Unlock()
if !server.running {
return &Node{}
}
// hostAddr, _ := ma.NewMultiaddr(fmt.Sprintf("/ipfs/%s", server.host.ID().Pretty()))
addr := server.host.Addrs()[0]
// fullAddr := addr.Encapsulate(hostAddr)
return &Node{Addr: addr, Id: server.host.ID()}
}
// GetPeerByRemoteID get specific peer by remoteID
// if it doesn't exist, new it
// this function guarantee get the wanted peer
func (server *Server) GetPeerByRemoteID(s inet.Stream) *Peer {
var p *Peer
// always try to new this peer
err := server.dispatch(&Stream{stream: s, Protocols: server.protomap[PID]}, server.addpeer)
if err != nil {
log.Error("GetPeerByRemoteID()", "new peer error", err)
return nil
}
select {
case <-server.quit:
case server.peerOp <- func(peers map[peer.ID]*Peer) {
remoteID := s.Conn().RemotePeer()
if val, ok := peers[remoteID]; ok {
p = val
}
}:
<-server.peerOpDone
}
pid := s.Conn().RemotePeer()
log.Debug("Got peer by remote id", "peerid", pid, "peer got", p)
return p
}
func (server *Server) Peers() []*Peer {
var ps []*Peer
select {
case <-server.quit:
case server.peerOp <- func(peers map[peer.ID]*Peer) {
for _, p := range peers {
ps = append(ps, p)
}
}:
<-server.peerOpDone
}
return ps
}
func (server *Server) PeerCount() int {
var count int
select {
case <-server.quit:
case server.peerOp <- func(ps map[peer.ID]*Peer) { count = len(ps) }:
<-server.peerOpDone
}
return count
}
func (server *Server) maxDialedConns() int {
r := server.DialRatio
if r == 0 {
r = defaultDialRatio
}
return server.MaxPeers / r
}
// SetupStream 主动发起连接
func (server *Server) SetupStream(ctx context.Context, target peer.ID, pid string) error {
s, err := server.host.NewStream(ctx, target, protocol.ID(pid))
if err != nil {
// fmt.Println("SetupStream NewStream Error: ", err)
return err
}
// handle response message
go server.HandleStream(s)
/* rw := bufio.NewReadWriter(bufio.NewReader(s), bufio.NewWriter(s))
vntMessenger := &VNTMsger{
protocol: Protocol{},
in: make(chan Msg),
w: rw,
}
their, err := doProtocolHandshake(vntMessenger, server.ourHandshake)
if err != nil {
log.Error("SetupStream()", "failed protocolHandshake", err)
return err
} */
err = server.dispatch(&Stream{stream: s, Protocols: server.protomap[pid]}, server.addpeer)
if err != nil {
fmt.Println("SetupStream dispatch Error: ", err)
return err
}
return nil
}
func (server *Server) runPeer(p *Peer) {
// broadcast peer add
server.peerFeed.Send(&PeerEvent{
Type: PeerEventTypeAdd,
Peer: p.RemoteID(),
})
// run the protocol
remoteRequested, err := p.run()
if err != nil {
log.Debug("Run peer failed", "peer id", p.RemoteID(), "peer addr", p.RemoteAddr())
}
// broadcast peer drop
server.peerFeed.Send(&PeerEvent{
Type: PeerEventTypeDrop,
Peer: p.RemoteID(),
Error: err.Error(),
})
// Note: run waits for existing peers to be sent on srv.delpeer
// before returning, so this send should not select on srv.quit.
server.delpeer <- peerDrop{p, err, remoteRequested}
}
func (server *Server) dispatch(s *Stream, stage chan<- *Stream) error {
select {
case <-server.quit:
return errServerStopped
case stage <- s:
}
return nil
}
type NodeInfo struct {
ID string `json:"id"` // Unique node identifier (also the encryption key)
Name string `json:"name"` // Name of the node, including client type, version, OS, custom data
VNTNode string `json:"vnode"` // Vnode URL for adding this peer from remote peers
IP string `json:"ip"` // IP address of the node
Ports struct {
Discovery int `json:"discovery"` // UDP listening port for discovery protocol
Listener int `json:"listener"` // TCP listening port for RLPx
} `json:"ports"`
ListenAddr string `json:"listenAddr"`
Protocols map[string]interface{} `json:"protocols"`
}
func (server *Server) NodeInfo() *NodeInfo {
node := server.Self()
info := &NodeInfo{
ID: node.Id.ToString(),
VNTNode: node.String(),
Name: server.Name,
IP: GetIPfromAddr(node.Addr),
ListenAddr: server.ListenAddr,
Protocols: make(map[string]interface{}),
}
// for _, proto := range server.Protocols {
// if _, ok := info.Protocols[proto.Name]; !ok {
// nodeInfo := interface{}("unknown")
// if query := proto.NodeInfo; query != nil {
// nodeInfo = proto.NodeInfo()
// }
// info.Protocols[proto.Name] = nodeInfo
// }
// }
return info
}
type taskworker interface {
newTasks(map[peer.ID]*Peer) []task
addStatic(n *Node)
removeStatic(n *Node)
taskDone(t task)
}