func NewService(cfg *config.Wrapper, myID protocol.DeviceID, mdl Model, tlsCfg *tls.Config, discoverer discover.Finder,
bepProtocolName string, tlsDefaultCommonName string, lans []*net.IPNet) *Service {
service := &Service{
Supervisor: suture.New("connections.Service", suture.Spec{
Log: func(line string) {
l.Infoln(line)
},
}),
cfg: cfg,
myID: myID,
model: mdl,
tlsCfg: tlsCfg,
discoverer: discoverer,
conns: make(chan internalConn),
bepProtocolName: bepProtocolName,
tlsDefaultCommonName: tlsDefaultCommonName,
lans: lans,
limiter: newLimiter(cfg),
natService: nat.NewService(myID, cfg),
listenersMut: sync.NewRWMutex(),
listeners: make(map[string]genericListener),
listenerTokens: make(map[string]suture.ServiceToken),
// A listener can fail twice, rapidly. Any more than that and it
// will be put on suspension for ten minutes. Restarts and changes
// due to config are done by removing and adding services, so are
// not subject to these limitations.
listenerSupervisor: suture.New("c.S.listenerSupervisor", suture.Spec{
Log: func(line string) {
l.Infoln(line)
},
FailureThreshold: 2,
FailureBackoff: 600 * time.Second,
}),
curConMut: sync.NewMutex(),
currentConnection: make(map[protocol.DeviceID]completeConn),
}
cfg.Subscribe(service)
// There are several moving parts here; one routine per listening address
// (handled in configuration changing) to handle incoming connections,
// one routine to periodically attempt outgoing connections, one routine to
// the the common handling regardless of whether the connection was
// incoming or outgoing.
service.Add(serviceFunc(service.connect))
service.Add(serviceFunc(service.handle))
service.Add(service.listenerSupervisor)
raw := cfg.RawCopy()
// Actually starts the listeners and NAT service
service.CommitConfiguration(raw, raw)
return service
}
func newLimiter(cfg *config.Wrapper) *limiter {
l := &limiter{
write: rate.NewLimiter(rate.Inf, limiterBurstSize),
read: rate.NewLimiter(rate.Inf, limiterBurstSize),
}
cfg.Subscribe(l)
prev := config.Configuration{Options: config.OptionsConfiguration{MaxRecvKbps: -1, MaxSendKbps: -1}}
l.CommitConfiguration(prev, cfg.RawCopy())
return l
}
func archiveAndSaveConfig(cfg *config.Wrapper) error {
// Copy the existing config to an archive copy
archivePath := cfg.ConfigPath() + fmt.Sprintf(".v%d", cfg.RawCopy().OriginalVersion)
l.Infoln("Archiving a copy of old config file format at:", archivePath)
if err := copyFile(cfg.ConfigPath(), archivePath); err != nil {
return err
}
// Do a regular atomic config sve
return cfg.Save()
}
func setPauseState(cfg *config.Wrapper, paused bool) {
raw := cfg.RawCopy()
for i := range raw.Devices {
raw.Devices[i].Paused = paused
}
for i := range raw.Folders {
raw.Folders[i].Paused = paused
}
if err := cfg.Replace(raw); err != nil {
l.Fatalln("Cannot adjust paused state:", err)
}
}
// NewProgressEmitter creates a new progress emitter which emits
// DownloadProgress events every interval.
func NewProgressEmitter(cfg *config.Wrapper) *ProgressEmitter {
t := &ProgressEmitter{
stop: make(chan struct{}),
registry: make(map[string]*sharedPullerState),
timer: time.NewTimer(time.Millisecond),
sentDownloadStates: make(map[protocol.DeviceID]*sentDownloadState),
connections: make(map[string][]protocol.Connection),
mut: sync.NewMutex(),
}
t.CommitConfiguration(config.Configuration{}, cfg.RawCopy())
cfg.Subscribe(t)
return t
}
func newUsageReportingManager(cfg *config.Wrapper, m *model.Model) *usageReportingManager {
mgr := &usageReportingManager{
cfg: cfg,
model: m,
}
// Start UR if it's enabled.
mgr.CommitConfiguration(config.Configuration{}, cfg.RawCopy())
// Listen to future config changes so that we can start and stop as
// appropriate.
cfg.Subscribe(mgr)
return mgr
}