2016-05-04 19:38:12 +00:00
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// 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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2017-02-09 06:52:18 +00:00
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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2016-05-04 19:38:12 +00:00
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package connections
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import (
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2019-11-26 07:39:51 +00:00
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"context"
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2016-05-04 19:38:12 +00:00
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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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2022-04-09 14:04:56 +00:00
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"github.com/syncthing/syncthing/lib/connections/registry"
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2016-05-04 19:38:12 +00:00
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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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func init() {
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2016-05-09 15:33:25 +00:00
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dialers["relay"] = relayDialerFactory{}
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2016-05-04 19:38:12 +00:00
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}
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type relayDialer struct {
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commonDialer
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2016-05-04 19:38:12 +00:00
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}
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2019-11-26 07:39:51 +00:00
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func (d *relayDialer) Dial(ctx context.Context, id protocol.DeviceID, uri *url.URL) (internalConn, error) {
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inv, err := client.GetInvitationFromRelay(ctx, uri, id, d.tlsCfg.Certificates, 10*time.Second)
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2016-05-04 19:38:12 +00:00
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if err != nil {
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2016-11-30 07:54:20 +00:00
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return internalConn{}, err
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2016-05-04 19:38:12 +00:00
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}
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2019-11-26 07:39:51 +00:00
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conn, err := client.JoinSession(ctx, inv)
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2016-05-04 19:38:12 +00:00
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if err != nil {
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return internalConn{}, err
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2016-05-04 19:38:12 +00:00
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}
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2016-05-31 08:11:57 +00:00
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err = dialer.SetTCPOptions(conn)
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2016-05-04 19:38:12 +00:00
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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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2019-11-26 07:36:58 +00:00
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err = dialer.SetTrafficClass(conn, d.trafficClass)
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2016-12-20 20:14:52 +00:00
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if err != nil {
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2017-11-14 21:49:36 +00:00
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l.Debugln("Dial (BEP/relay): setting traffic class:", err)
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2016-12-20 20:14:52 +00:00
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}
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2016-05-04 19:38:12 +00:00
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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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2016-07-02 20:33:31 +00:00
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err = tlsTimedHandshake(tc)
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2016-05-04 19:38:12 +00:00
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if err != nil {
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tc.Close()
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return internalConn{}, err
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2016-05-04 19:38:12 +00:00
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}
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2023-04-16 12:54:28 +00:00
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return newInternalConn(tc, connTypeRelayClient, false, d.wanPriority), nil
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2016-05-04 19:38:12 +00:00
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}
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2023-07-18 14:33:13 +00:00
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func (d *relayDialer) Priority(_ string) int {
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2023-04-19 08:40:29 +00:00
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return d.wanPriority
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}
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2016-05-09 15:33:25 +00:00
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type relayDialerFactory struct{}
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2023-04-16 12:54:28 +00:00
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func (relayDialerFactory) New(opts config.OptionsConfiguration, tlsCfg *tls.Config, _ *registry.Registry, _ *lanChecker) genericDialer {
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return &relayDialer{commonDialer{
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trafficClass: opts.TrafficClass,
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reconnectInterval: time.Duration(opts.RelayReconnectIntervalM) * time.Minute,
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tlsCfg: tlsCfg,
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wanPriority: opts.ConnectionPriorityRelay,
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lanPriority: opts.ConnectionPriorityRelay,
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}}
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}
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2016-05-09 15:33:25 +00:00
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2017-11-22 07:05:49 +00:00
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func (relayDialerFactory) AlwaysWAN() bool {
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return true
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}
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2018-02-09 10:40:57 +00:00
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func (relayDialerFactory) Valid(cfg config.Configuration) error {
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if !cfg.Options.RelaysEnabled {
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return errDisabled
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}
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return nil
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2016-05-17 00:05:38 +00:00
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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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