98 lines
2.2 KiB
Go
98 lines
2.2 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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"context"
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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/connections/registry"
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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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commonDialer
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}
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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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if err != nil {
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return internalConn{}, err
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}
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conn, err := client.JoinSession(ctx, 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.trafficClass)
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if err != nil {
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l.Debugln("Dial (BEP/relay): setting traffic class:", 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 newInternalConn(tc, connTypeRelayClient, relayPriority), nil
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}
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type relayDialerFactory struct{}
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func (relayDialerFactory) New(opts config.OptionsConfiguration, tlsCfg *tls.Config, _ *registry.Registry) 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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}}
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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) AlwaysWAN() bool {
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return true
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}
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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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}
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func (relayDialerFactory) String() string {
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return "Relay Dialer"
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}
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