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Feature: support relay UDP traffic

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This commit is contained in:
yaling888
2022-05-22 05:32:15 +08:00
parent 622b10d34d
commit ce1014eae3
15 changed files with 414 additions and 86 deletions
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78
adapter/outbound/trojan.go
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@@ -72,8 +72,7 @@ func (t *Trojan) plainStream(c net.Conn) (net.Conn, error) {
return t.instance.StreamConn(c)
}
// StreamConn implements C.ProxyAdapter
func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
func (t *Trojan) trojanStream(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
var err error
if t.transport != nil {
c, err = gun.StreamGunWithConn(c, t.gunTLSConfig, t.gunConfig)
@@ -85,39 +84,63 @@ func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error)
return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
}
c, err = t.instance.PresetXTLSConn(c)
c, err = t.instance.PrepareXTLSConn(c)
if err != nil {
return nil, err
return c, err
}
if metadata.NetWork == C.UDP {
err = t.instance.WriteHeader(c, trojan.CommandUDP, serializesSocksAddr(metadata))
return c, err
}
err = t.instance.WriteHeader(c, trojan.CommandTCP, serializesSocksAddr(metadata))
return c, err
}
// StreamConn implements C.ProxyAdapter
func (t *Trojan) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
return t.trojanStream(c, metadata)
}
// StreamPacketConn implements C.ProxyAdapter
func (t *Trojan) StreamPacketConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
var err error
c, err = t.trojanStream(c, metadata)
if err != nil {
return c, err
}
pc := t.instance.PacketConn(c)
return WrapConn(pc), nil
}
// DialContext implements C.ProxyAdapter
func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
var c net.Conn
// gun transport
if t.transport != nil && len(opts) == 0 {
c, err := gun.StreamGunWithTransport(t.transport, t.gunConfig)
c, err = gun.StreamGunWithTransport(t.transport, t.gunConfig)
if err != nil {
return nil, err
}
c, err = t.instance.PresetXTLSConn(c)
defer safeConnClose(c, err)
c, err = t.instance.PrepareXTLSConn(c)
if err != nil {
c.Close()
return nil, err
}
if err = t.instance.WriteHeader(c, trojan.CommandTCP, serializesSocksAddr(metadata)); err != nil {
c.Close()
return nil, err
}
return NewConn(c, t), nil
}
c, err := dialer.DialContext(ctx, "tcp", t.addr, t.Base.DialOptions(opts...)...)
c, err = dialer.DialContext(ctx, "tcp", t.addr, t.Base.DialOptions(opts...)...)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
}
@@ -137,33 +160,44 @@ func (t *Trojan) DialContext(ctx context.Context, metadata *C.Metadata, opts ...
func (t *Trojan) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
var c net.Conn
// grpc transport
// gun transport
if t.transport != nil && len(opts) == 0 {
c, err = gun.StreamGunWithTransport(t.transport, t.gunConfig)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
return nil, err
}
defer safeConnClose(c, err)
} else {
c, err = dialer.DialContext(ctx, "tcp", t.addr, t.Base.DialOptions(opts...)...)
c, err = t.instance.PrepareXTLSConn(c)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
return nil, err
}
defer safeConnClose(c, err)
tcpKeepAlive(c)
c, err = t.plainStream(c)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
if err = t.instance.WriteHeader(c, trojan.CommandUDP, serializesSocksAddr(metadata)); err != nil {
return nil, err
}
pc := t.instance.PacketConn(c)
return NewPacketConn(pc, t), nil
}
err = t.instance.WriteHeader(c, trojan.CommandUDP, serializesSocksAddr(metadata))
c, err = dialer.DialContext(ctx, "tcp", t.addr, t.Base.DialOptions(opts...)...)
if err != nil {
return nil, fmt.Errorf("%s connect error: %w", t.addr, err)
}
tcpKeepAlive(c)
defer safeConnClose(c, err)
c, err = t.StreamPacketConn(c, metadata)
if err != nil {
return nil, err
}
pc := t.instance.PacketConn(c)
return newPacketConn(pc, t), err
return NewPacketConn(c.(net.PacketConn), t), nil
}
func NewTrojan(option TrojanOption) (*Trojan, error) {