func discovery(addr string) *discover.Discoverer {
_, portstr, err := net.SplitHostPort(addr)
fatalErr(err)
port, _ := strconv.Atoi(portstr)
if !cfg.Options.LocalAnnEnabled {
port = -1
} else if verbose {
infoln("Sending local discovery announcements")
}
if !cfg.Options.GlobalAnnEnabled {
cfg.Options.GlobalAnnServer = ""
} else if verbose {
infoln("Sending external discovery announcements")
}
disc, err := discover.NewDiscoverer(myID, port, cfg.Options.GlobalAnnServer)
if err != nil {
warnf("No discovery possible (%v)", err)
}
return disc
}
func discovery(extPort int) *discover.Discoverer {
disc, err := discover.NewDiscoverer(myID, cfg.Options.ListenAddress, cfg.Options.LocalAnnPort)
if err != nil {
l.Warnf("No discovery possible (%v)", err)
return nil
}
if cfg.Options.LocalAnnEnabled {
l.Infoln("Sending local discovery announcements")
disc.StartLocal()
}
if cfg.Options.GlobalAnnEnabled {
l.Infoln("Sending global discovery announcements")
disc.StartGlobal(cfg.Options.GlobalAnnServer, uint16(extPort))
}
return disc
}
func connect(myID string, addr string, nodeAddrs map[string][]string, m *Model, cfg *tls.Config) {
_, portstr, err := net.SplitHostPort(addr)
fatalErr(err)
port, _ := strconv.Atoi(portstr)
if opts.Discovery.NoLocalDiscovery {
port = -1
} else {
infoln("Sending local discovery announcements")
}
if opts.Discovery.NoExternalDiscovery {
opts.Discovery.ExternalPort = -1
} else {
infoln("Sending external discovery announcements")
}
disc, err := discover.NewDiscoverer(myID, port, opts.Discovery.ExternalPort, opts.Discovery.ExternalServer)
if err != nil {
warnf("No discovery possible (%v)", err)
}
for {
nextNode:
for nodeID, addrs := range nodeAddrs {
if nodeID == myID {
continue
}
if m.ConnectedTo(nodeID) {
continue
}
for _, addr := range addrs {
if addr == "dynamic" {
var ok bool
if disc != nil {
addr, ok = disc.Lookup(nodeID)
}
if !ok {
continue
}
}
if opts.Debug.TraceNet {
debugln("NET: Dial", nodeID, addr)
}
conn, err := tls.Dial("tcp", addr, cfg)
if err != nil {
if opts.Debug.TraceNet {
debugln("NET:", err)
}
continue
}
remoteID := certId(conn.ConnectionState().PeerCertificates[0].Raw)
if remoteID != nodeID {
warnln("Unexpected nodeID", remoteID, "!=", nodeID)
conn.Close()
continue
}
m.AddConnection(conn, remoteID)
continue nextNode
}
}
time.Sleep(opts.Advanced.ConnInterval)
}
}