97 lines
2.1 KiB
Go
97 lines
2.1 KiB
Go
// Copyright (C) 2016 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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package connections
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import (
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"crypto/tls"
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"net/url"
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"time"
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"github.com/syncthing/syncthing/lib/config"
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"github.com/syncthing/syncthing/lib/dialer"
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"github.com/syncthing/syncthing/lib/protocol"
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"github.com/syncthing/syncthing/lib/relay/client"
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)
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const relayPriority = 200
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func init() {
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dialers["relay"] = relayDialerFactory{}
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}
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type relayDialer struct {
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cfg *config.Wrapper
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tlsCfg *tls.Config
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}
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func (d *relayDialer) Dial(id protocol.DeviceID, uri *url.URL) (internalConn, error) {
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inv, err := client.GetInvitationFromRelay(uri, id, d.tlsCfg.Certificates, 10*time.Second)
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if err != nil {
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return internalConn{}, err
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}
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conn, err := client.JoinSession(inv)
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if err != nil {
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return internalConn{}, err
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}
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err = dialer.SetTCPOptions(conn)
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if err != nil {
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conn.Close()
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return internalConn{}, err
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}
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err = dialer.SetTrafficClass(conn, d.cfg.Options().TrafficClass)
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if err != nil {
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l.Debugf("failed to set traffic class: %s", err)
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}
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var tc *tls.Conn
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if inv.ServerSocket {
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tc = tls.Server(conn, d.tlsCfg)
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} else {
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tc = tls.Client(conn, d.tlsCfg)
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}
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err = tlsTimedHandshake(tc)
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if err != nil {
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tc.Close()
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return internalConn{}, err
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}
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return internalConn{tc, connTypeRelayClient, relayPriority}, nil
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}
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func (relayDialer) Priority() int {
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return relayPriority
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}
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func (d *relayDialer) RedialFrequency() time.Duration {
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return time.Duration(d.cfg.Options().RelayReconnectIntervalM) * time.Minute
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}
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type relayDialerFactory struct{}
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func (relayDialerFactory) New(cfg *config.Wrapper, tlsCfg *tls.Config) genericDialer {
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return &relayDialer{
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cfg: cfg,
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tlsCfg: tlsCfg,
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}
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}
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func (relayDialerFactory) Priority() int {
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return relayPriority
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}
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func (relayDialerFactory) Enabled(cfg config.Configuration) bool {
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return cfg.Options.RelaysEnabled
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}
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func (relayDialerFactory) String() string {
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return "Relay Dialer"
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}
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