世界
107 lines
3.2 KiB
Go
107 lines
3.2 KiB
Go
package transport
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import (
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"context"
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"net"
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"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-box/common/dialer"
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"github.com/sagernet/sing-box/common/tls"
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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing-box/dns"
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"github.com/sagernet/sing-box/log"
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"github.com/sagernet/sing-box/option"
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"github.com/sagernet/sing/common"
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E "github.com/sagernet/sing/common/exceptions"
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"github.com/sagernet/sing/common/logger"
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M "github.com/sagernet/sing/common/metadata"
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N "github.com/sagernet/sing/common/network"
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mDNS "github.com/miekg/dns"
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)
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var _ adapter.DNSTransport = (*TLSTransport)(nil)
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func RegisterTLS(registry *dns.TransportRegistry) {
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dns.RegisterTransport[option.RemoteTLSDNSServerOptions](registry, C.DNSTypeTLS, NewTLS)
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}
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type TLSTransport struct {
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dns.TransportAdapter
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logger logger.ContextLogger
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dialer tls.Dialer
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serverAddr M.Socksaddr
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multiplexer *queryMultiplexer
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}
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func NewTLS(ctx context.Context, logger log.ContextLogger, tag string, options option.RemoteTLSDNSServerOptions) (adapter.DNSTransport, error) {
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transportDialer, err := dns.NewRemoteDialer(ctx, options.RemoteDNSServerOptions)
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if err != nil {
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return nil, err
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}
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tlsOptions := common.PtrValueOrDefault(options.TLS)
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tlsOptions.Enabled = true
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tlsConfig, err := tls.NewClient(ctx, logger, options.Server, tlsOptions)
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if err != nil {
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return nil, err
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}
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serverAddr := options.DNSServerAddressOptions.Build()
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if serverAddr.Port == 0 {
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serverAddr.Port = 853
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}
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if !serverAddr.IsValid() {
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return nil, E.New("invalid server address: ", serverAddr)
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}
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return NewTLSRaw(logger, dns.NewTransportAdapterWithRemoteOptions(C.DNSTypeTLS, tag, options.RemoteDNSServerOptions), transportDialer, serverAddr, tlsConfig), nil
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}
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func NewTLSRaw(logger logger.ContextLogger, adapter dns.TransportAdapter, dialer N.Dialer, serverAddr M.Socksaddr, tlsConfig tls.Config) *TLSTransport {
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t := &TLSTransport{
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TransportAdapter: adapter,
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logger: logger,
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dialer: tls.NewDialer(dialer, tlsConfig),
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serverAddr: serverAddr,
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}
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t.multiplexer = newQueryMultiplexer(queryMultiplexerOptions{
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dial: func(ctx context.Context) (net.Conn, error) {
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conn, err := t.dialer.DialTLSContext(ctx, t.serverAddr)
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if err != nil {
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return nil, E.Cause(err, "dial TLS connection")
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}
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return conn, nil
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},
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write: func(conn net.Conn, message *mDNS.Msg, queryId uint16) error {
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return WriteMessage(conn, queryId, message)
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},
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readNext: func(conn net.Conn) (*mDNS.Msg, error) {
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return ReadMessage(conn)
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},
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retryReadError: true,
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probeReuse: true,
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})
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return t
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}
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func (t *TLSTransport) Start(stage adapter.StartStage) error {
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if stage != adapter.StartStateStart {
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return nil
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}
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return dialer.InitializeDetour(t.dialer)
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}
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func (t *TLSTransport) Close() error {
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return t.multiplexer.Close()
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}
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func (t *TLSTransport) Reset() {
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t.multiplexer.Reset()
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}
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func (t *TLSTransport) Exchange(ctx context.Context, message *mDNS.Msg) (*mDNS.Msg, error) {
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return t.multiplexer.Exchange(ctx, message)
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}
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func (t *TLSTransport) ExchangeAsync(ctx context.Context, message *mDNS.Msg, callback func(response *mDNS.Msg, err error)) {
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t.multiplexer.ExchangeAsync(ctx, message, callback)
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}
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