138 lines
3.9 KiB
Go
138 lines
3.9 KiB
Go
package outbound
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import (
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"context"
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"errors"
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"net"
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"runtime"
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CN "github.com/Dreamacro/clash/common/net"
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"github.com/Dreamacro/clash/component/dialer"
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"github.com/Dreamacro/clash/component/proxydialer"
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"github.com/Dreamacro/clash/component/resolver"
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C "github.com/Dreamacro/clash/constant"
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mux "github.com/sagernet/sing-mux"
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E "github.com/sagernet/sing/common/exceptions"
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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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)
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type SingMux struct {
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C.ProxyAdapter
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base ProxyBase
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client *mux.Client
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dialer *muxSingDialer
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onlyTcp bool
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}
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type SingMuxOption struct {
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Enabled bool `proxy:"enabled,omitempty"`
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Protocol string `proxy:"protocol,omitempty"`
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MaxConnections int `proxy:"max-connections,omitempty"`
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MinStreams int `proxy:"min-streams,omitempty"`
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MaxStreams int `proxy:"max-streams,omitempty"`
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Padding bool `proxy:"padding,omitempty"`
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Statistic bool `proxy:"statistic,omitempty"`
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OnlyTcp bool `proxy:"only-tcp,omitempty"`
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}
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type ProxyBase interface {
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DialOptions(opts ...dialer.Option) []dialer.Option
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}
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type muxSingDialer struct {
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dialer dialer.Dialer
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proxy C.ProxyAdapter
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statistic bool
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}
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var _ N.Dialer = (*muxSingDialer)(nil)
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func (d *muxSingDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
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var cDialer C.Dialer = proxydialer.New(d.proxy, d.dialer, d.statistic)
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return cDialer.DialContext(ctx, network, destination.String())
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}
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func (d *muxSingDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
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var cDialer C.Dialer = proxydialer.New(d.proxy, d.dialer, d.statistic)
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return cDialer.ListenPacket(ctx, "udp", "", destination.AddrPort())
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}
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func (s *SingMux) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
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options := s.base.DialOptions(opts...)
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s.dialer.dialer = dialer.NewDialer(options...)
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c, err := s.client.DialContext(ctx, "tcp", M.ParseSocksaddr(metadata.RemoteAddress()))
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if err != nil {
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return nil, err
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}
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return NewConn(CN.NewRefConn(c, s), s.ProxyAdapter), err
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}
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func (s *SingMux) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
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if s.onlyTcp {
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return s.ProxyAdapter.ListenPacketContext(ctx, metadata, opts...)
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}
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options := s.base.DialOptions(opts...)
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s.dialer.dialer = dialer.NewDialer(options...)
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// sing-mux use stream-oriented udp with a special address, so we need a net.UDPAddr
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if !metadata.Resolved() {
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ip, err := resolver.ResolveIP(ctx, metadata.Host)
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if err != nil {
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return nil, errors.New("can't resolve ip")
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}
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metadata.DstIP = ip
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}
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pc, err := s.client.ListenPacket(ctx, M.SocksaddrFromNet(metadata.UDPAddr()))
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if err != nil {
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return nil, err
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}
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if pc == nil {
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return nil, E.New("packetConn is nil")
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}
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return newPacketConn(CN.NewRefPacketConn(pc, s), s.ProxyAdapter), nil
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}
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func (s *SingMux) SupportUDP() bool {
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if s.onlyTcp {
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return s.ProxyAdapter.SupportUOT()
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}
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return true
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}
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func (s *SingMux) SupportUOT() bool {
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if s.onlyTcp {
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return s.ProxyAdapter.SupportUOT()
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}
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return true
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}
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func closeSingMux(s *SingMux) {
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_ = s.client.Close()
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}
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func NewSingMux(option SingMuxOption, proxy C.ProxyAdapter, base ProxyBase) (C.ProxyAdapter, error) {
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singDialer := &muxSingDialer{dialer: dialer.NewDialer(), proxy: proxy, statistic: option.Statistic}
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client, err := mux.NewClient(mux.Options{
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Dialer: singDialer,
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Protocol: option.Protocol,
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MaxConnections: option.MaxConnections,
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MinStreams: option.MinStreams,
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MaxStreams: option.MaxStreams,
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Padding: option.Padding,
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})
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if err != nil {
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return nil, err
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}
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outbound := &SingMux{
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ProxyAdapter: proxy,
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base: base,
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client: client,
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dialer: singDialer,
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onlyTcp: option.OnlyTcp,
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}
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runtime.SetFinalizer(outbound, closeSingMux)
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return outbound, nil
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}
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