func (s *Svc) CommitConfiguration(from, to config.Configuration) bool {
existing := make(map[string]*url.URL, len(to.Options.RelayServers))
for _, addr := range to.Options.RelayServers {
uri, err := url.Parse(addr)
if err != nil {
l.Debugln("Failed to parse relay address", addr, err)
continue
}
existing[uri.String()] = uri
}
// Query dynamic addresses, and pick the closest relay from the ones they provide.
for key, uri := range existing {
if uri.Scheme != "dynamic+http" && uri.Scheme != "dynamic+https" {
continue
}
delete(existing, key)
// Trim off the `dynamic+` prefix
uri.Scheme = uri.Scheme[8:]
l.Debugln("Looking up dynamic relays from", uri)
data, err := http.Get(uri.String())
if err != nil {
l.Debugln("Failed to lookup dynamic relays", err)
continue
}
var ann dynamicAnnouncement
err = json.NewDecoder(data.Body).Decode(&ann)
data.Body.Close()
if err != nil {
l.Debugln("Failed to lookup dynamic relays", err)
continue
}
var dynRelayAddrs []string
for _, relayAnn := range ann.Relays {
ruri, err := url.Parse(relayAnn.URL)
if err != nil {
l.Debugln("Failed to parse dynamic relay address", relayAnn.URL, err)
continue
}
l.Debugln("Found", ruri, "via", uri)
dynRelayAddrs = append(dynRelayAddrs, ruri.String())
}
if len(dynRelayAddrs) > 0 {
dynRelayAddrs = relayAddressesSortedByLatency(dynRelayAddrs)
closestRelay := dynRelayAddrs[0]
l.Debugln("Picking", closestRelay, "as closest dynamic relay from", uri)
ruri, _ := url.Parse(closestRelay)
existing[closestRelay] = ruri
} else {
l.Debugln("No dynamic relay found on", uri)
}
}
s.mut.Lock()
for key, uri := range existing {
_, ok := s.tokens[key]
if !ok {
l.Debugln("Connecting to relay", uri)
c := client.NewProtocolClient(uri, s.tlsCfg.Certificates, s.invitations)
s.tokens[key] = s.Add(c)
s.clients[key] = c
}
}
for key, token := range s.tokens {
_, ok := existing[key]
if !ok {
err := s.Remove(token)
delete(s.tokens, key)
delete(s.clients, key)
l.Debugln("Disconnecting from relay", key, err)
}
}
s.mut.Unlock()
return true
}
func main() {
log.SetOutput(os.Stdout)
log.SetFlags(log.LstdFlags | log.Lshortfile)
var connect, relay, dir string
var join, test bool
flag.StringVar(&connect, "connect", "", "Device ID to which to connect to")
flag.BoolVar(&join, "join", false, "Join relay")
flag.BoolVar(&test, "test", false, "Generic relay test")
flag.StringVar(&relay, "relay", "relay://127.0.0.1:22067", "Relay address")
flag.StringVar(&dir, "keys", ".", "Directory where cert.pem and key.pem is stored")
flag.Parse()
certFile, keyFile := filepath.Join(dir, "cert.pem"), filepath.Join(dir, "key.pem")
cert, err := tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
log.Fatalln("Failed to load X509 key pair:", err)
}
id := syncthingprotocol.NewDeviceID(cert.Certificate[0])
log.Println("ID:", id)
uri, err := url.Parse(relay)
if err != nil {
log.Fatal(err)
}
stdin := make(chan string)
go stdinReader(stdin)
if join {
log.Println("Creating client")
relay := client.NewProtocolClient(uri, []tls.Certificate{cert}, nil)
log.Println("Created client")
go relay.Serve()
recv := make(chan protocol.SessionInvitation)
go func() {
log.Println("Starting invitation receiver")
for invite := range relay.Invitations {
select {
case recv <- invite:
log.Println("Received invitation", invite)
default:
log.Println("Discarding invitation", invite)
}
}
}()
for {
conn, err := client.JoinSession(<-recv)
if err != nil {
log.Fatalln("Failed to join", err)
}
log.Println("Joined", conn.RemoteAddr(), conn.LocalAddr())
connectToStdio(stdin, conn)
log.Println("Finished", conn.RemoteAddr(), conn.LocalAddr())
}
} else if connect != "" {
id, err := syncthingprotocol.DeviceIDFromString(connect)
if err != nil {
log.Fatal(err)
}
invite, err := client.GetInvitationFromRelay(uri, id, []tls.Certificate{cert})
if err != nil {
log.Fatal(err)
}
log.Println("Received invitation", invite)
conn, err := client.JoinSession(invite)
if err != nil {
log.Fatalln("Failed to join", err)
}
log.Println("Joined", conn.RemoteAddr(), conn.LocalAddr())
connectToStdio(stdin, conn)
log.Println("Finished", conn.RemoteAddr(), conn.LocalAddr())
} else if test {
if client.TestRelay(uri, []tls.Certificate{cert}) {
log.Println("OK")
} else {
log.Println("FAIL")
}
} else {
log.Fatal("Requires either join or connect")
}
}