feat: add proxy and sing-based listener support sing-mux

adapter/outbound/singmux.go

@@ -0,0 +1,97 @@
+package outbound
+
+import (
+	"context"
+	"net"
+
+	"github.com/Dreamacro/clash/component/dialer"
+	"github.com/Dreamacro/clash/component/proxydialer"
+	C "github.com/Dreamacro/clash/constant"
+
+	mux "github.com/sagernet/sing-mux"
+	E "github.com/sagernet/sing/common/exceptions"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+)
+
+type SingMux struct {
+	C.ProxyAdapter
+	base   ProxyBase
+	client *mux.Client
+	dialer *muxSingDialer
+}
+
+type SingMuxOption struct {
+	Enabled        bool   `proxy:"enabled,omitempty"`
+	Protocol       string `proxy:"protocol,omitempty"`
+	MaxConnections int    `proxy:"max-connections,omitempty"`
+	MinStreams     int    `proxy:"min-streams,omitempty"`
+	MaxStreams     int    `proxy:"max-streams,omitempty"`
+	Padding        bool   `proxy:"padding,omitempty"`
+}
+
+type ProxyBase interface {
+	DialOptions(opts ...dialer.Option) []dialer.Option
+}
+
+type muxSingDialer struct {
+	dialer dialer.Dialer
+	proxy  C.ProxyAdapter
+}
+
+var _ N.Dialer = (*muxSingDialer)(nil)
+
+func (d *muxSingDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
+	var cDialer C.Dialer = proxydialer.New(d.proxy, d.dialer, false)
+	return cDialer.DialContext(ctx, network, destination.String())
+}
+
+func (d *muxSingDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
+	var cDialer C.Dialer = proxydialer.New(d.proxy, d.dialer, false)
+	return cDialer.ListenPacket(ctx, "udp", "", destination.AddrPort())
+}
+
+func (s *SingMux) DialContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.Conn, err error) {
+	options := s.base.DialOptions(opts...)
+	s.dialer.dialer = dialer.NewDialer(options...)
+	c, err := s.client.DialContext(ctx, "tcp", M.ParseSocksaddr(metadata.RemoteAddress()))
+	if err != nil {
+		return nil, err
+	}
+	return NewConn(c, s.ProxyAdapter), err
+}
+
+func (s *SingMux) ListenPacketContext(ctx context.Context, metadata *C.Metadata, opts ...dialer.Option) (_ C.PacketConn, err error) {
+	options := s.base.DialOptions(opts...)
+	s.dialer.dialer = dialer.NewDialer(options...)
+	pc, err := s.client.ListenPacket(ctx, M.ParseSocksaddr(metadata.RemoteAddress()))
+	if err != nil {
+		return nil, err
+	}
+	if pc == nil {
+		return nil, E.New("packetConn is nil")
+	}
+	return newPacketConn(pc, s.ProxyAdapter), nil
+}
+
+func NewSingMux(option SingMuxOption, proxy C.ProxyAdapter, base ProxyBase) (C.ProxyAdapter, error) {
+	singDialer := &muxSingDialer{dialer: dialer.NewDialer(), proxy: proxy}
+	client, err := mux.NewClient(mux.Options{
+		Context:        context.TODO(),
+		Dialer:         singDialer,
+		Protocol:       option.Protocol,
+		MaxConnections: option.MaxConnections,
+		MinStreams:     option.MinStreams,
+		MaxStreams:     option.MaxStreams,
+		Padding:        option.Padding,
+	})
+	if err != nil {
+		return nil, err
+	}
+	return &SingMux{
+		ProxyAdapter: proxy,
+		base:         base,
+		client:       client,
+		dialer:       singDialer,
+	}, nil
+}

adapter/parser.go

@@ -114,5 +114,19 @@ func ParseProxy(mapping map[string]any) (C.Proxy, error) {
 		return nil, err
 	}
 
+	if muxMapping, muxExist := mapping["smux"].(map[string]any); muxExist {
+		muxOption := &outbound.SingMuxOption{}
+		err = decoder.Decode(muxMapping, muxOption)
+		if err != nil {
+			return nil, err
+		}
+		if muxOption.Enabled {
+			proxy, err = outbound.NewSingMux(*muxOption, proxy, proxy.(outbound.ProxyBase))
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+
 	return NewProxy(proxy), nil
 }

go.mod

@@ -28,7 +28,8 @@ require (
 	github.com/openacid/low v0.1.21
 	github.com/oschwald/geoip2-golang v1.8.0
 	github.com/sagernet/netlink v0.0.0-20220905062125-8043b4a9aa97
-	github.com/sagernet/sing v0.2.4
+	github.com/sagernet/sing v0.2.5-0.20230423085534-0902e6216207
+	github.com/sagernet/sing-mux v0.0.0-20230423111236-a3ebc1453fd6
 	github.com/sagernet/sing-shadowtls v0.1.2-0.20230417103049-4f682e05f19b
 	github.com/sagernet/sing-vmess v0.1.5-0.20230417103030-8c3070ae3fb3
 	github.com/sagernet/tfo-go v0.0.0-20230303015439-ffcfd8c41cf9
@@ -69,6 +70,7 @@ require (
 	github.com/google/btree v1.0.1 // indirect
 	github.com/google/go-cmp v0.5.9 // indirect
 	github.com/google/pprof v0.0.0-20210407192527-94a9f03dee38 // indirect
+	github.com/hashicorp/yamux v0.1.1 // indirect
 	github.com/josharian/native v1.1.0 // indirect
 	github.com/klauspost/compress v1.15.15 // indirect
 	github.com/klauspost/cpuid/v2 v2.0.12 // indirect
@@ -86,6 +88,7 @@ require (
 	github.com/quic-go/qtls-go1-19 v0.2.1 // indirect
 	github.com/quic-go/qtls-go1-20 v0.1.1 // indirect
 	github.com/sagernet/go-tun2socks v1.16.12-0.20220818015926-16cb67876a61 // indirect
+	github.com/sagernet/smux v0.0.0-20230312102458-337ec2a5af37 // indirect
 	github.com/shoenig/go-m1cpu v0.1.5 // indirect
 	github.com/sina-ghaderi/poly1305 v0.0.0-20220724002748-c5926b03988b // indirect
 	github.com/sina-ghaderi/rabaead v0.0.0-20220730151906-ab6e06b96e8c // indirect

go.sum

@@ -67,6 +67,8 @@ github.com/gorilla/websocket v1.5.0 h1:PPwGk2jz7EePpoHN/+ClbZu8SPxiqlu12wZP/3sWm
 github.com/gorilla/websocket v1.5.0/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/hashicorp/golang-lru v0.5.4 h1:YDjusn29QI/Das2iO9M0BHnIbxPeyuCHsjMW+lJfyTc=
 github.com/hashicorp/golang-lru v0.5.4/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=
+github.com/hashicorp/yamux v0.1.1 h1:yrQxtgseBDrq9Y652vSRDvsKCJKOUD+GzTS4Y0Y8pvE=
+github.com/hashicorp/yamux v0.1.1/go.mod h1:CtWFDAQgb7dxtzFs4tWbplKIe2jSi3+5vKbgIO0SLnQ=
 github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/insomniacslk/dhcp v0.0.0-20230407062729-974c6f05fe16 h1:+aAGyK41KRn8jbF2Q7PLL0Sxwg6dShGcQSeCC7nZQ8E=
 github.com/insomniacslk/dhcp v0.0.0-20230407062729-974c6f05fe16/go.mod h1:IKrnDWs3/Mqq5n0lI+RxA2sB7MvN/vbMBP3ehXg65UI=
@@ -142,12 +144,17 @@ github.com/sagernet/go-tun2socks v1.16.12-0.20220818015926-16cb67876a61/go.mod h
 github.com/sagernet/netlink v0.0.0-20220905062125-8043b4a9aa97 h1:iL5gZI3uFp0X6EslacyapiRz7LLSJyr4RajF/BhMVyE=
 github.com/sagernet/netlink v0.0.0-20220905062125-8043b4a9aa97/go.mod h1:xLnfdiJbSp8rNqYEdIW/6eDO4mVoogml14Bh2hSiFpM=
 github.com/sagernet/sing v0.0.0-20220817130738-ce854cda8522/go.mod h1:QVsS5L/ZA2Q5UhQwLrn0Trw+msNd/NPGEhBKR/ioWiY=
-github.com/sagernet/sing v0.2.4 h1:gC8BR5sglbJZX23RtMyFa8EETP9YEUADhfbEzU1yVbo=
+github.com/sagernet/sing v0.1.8/go.mod h1:jt1w2u7lJQFFSGLiRrRIs5YWmx4kAPfWuOejuDW9qMk=
-github.com/sagernet/sing v0.2.4/go.mod h1:Ta8nHnDLAwqySzKhGoKk4ZIB+vJ3GTKj7UPrWYvM+4w=
+github.com/sagernet/sing v0.2.5-0.20230423085534-0902e6216207 h1:+dDVjW20IT+e8maKryaDeRY2+RFmTFdrQeIzqE2WOss=
+github.com/sagernet/sing v0.2.5-0.20230423085534-0902e6216207/go.mod h1:Ta8nHnDLAwqySzKhGoKk4ZIB+vJ3GTKj7UPrWYvM+4w=
+github.com/sagernet/sing-mux v0.0.0-20230423111236-a3ebc1453fd6 h1:Ehndd61kh3NL2nL8xtDQMZ89YIbC1wCyFMK2PxEBnls=
+github.com/sagernet/sing-mux v0.0.0-20230423111236-a3ebc1453fd6/go.mod h1:pF+RnLvCAOhECrvauy6LYOpBakJ/vuaF1Wm4lPsWryI=
 github.com/sagernet/sing-shadowtls v0.1.2-0.20230417103049-4f682e05f19b h1:ouW/6IDCrxkBe19YSbdCd7buHix7b+UZ6BM4Zz74XF4=
 github.com/sagernet/sing-shadowtls v0.1.2-0.20230417103049-4f682e05f19b/go.mod h1:oG8bPerYI6cZ74KquY3DvA7ynECyrILPBnce6wtBqeI=
 github.com/sagernet/sing-vmess v0.1.5-0.20230417103030-8c3070ae3fb3 h1:BHOnxrbC929JonuKqFdJ7ZbDp7zs4oTlH5KFvKtWu9U=
 github.com/sagernet/sing-vmess v0.1.5-0.20230417103030-8c3070ae3fb3/go.mod h1:yKrAr+dqZd64DxBXCHWrYicp+n4qbqO73mtwv3dck8U=
+github.com/sagernet/smux v0.0.0-20230312102458-337ec2a5af37 h1:HuE6xSwco/Xed8ajZ+coeYLmioq0Qp1/Z2zczFaV8as=
+github.com/sagernet/smux v0.0.0-20230312102458-337ec2a5af37/go.mod h1:3skNSftZDJWTGVtVaM2jfbce8qHnmH/AGDRe62iNOg0=
 github.com/sagernet/tfo-go v0.0.0-20230303015439-ffcfd8c41cf9 h1:2ItpW1nMNkPzmBTxV0/eClCklHrFSQMnUGcpUmJxVeE=
 github.com/sagernet/tfo-go v0.0.0-20230303015439-ffcfd8c41cf9/go.mod h1:FUyTEc5ye5NjKnDTDMuiLF2M6T4BE6y6KZuax//UCEg=
 github.com/sagernet/utls v0.0.0-20230309024959-6732c2ab36f2 h1:kDUqhc9Vsk5HJuhfIATJ8oQwBmpOZJuozQG7Vk88lL4=
@@ -239,6 +246,7 @@ golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220731174439-a90be440212d/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220908164124-27713097b956/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.7.0 h1:3jlCCIQZPdOYu1h8BkNvLz8Kgwtae2cagcG/VamtZRU=
 golang.org/x/sys v0.7.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

listener/sing/sing.go

@@ -15,6 +15,7 @@ import (
 	"github.com/Dreamacro/clash/log"
 	"github.com/Dreamacro/clash/transport/socks5"
 
+	mux "github.com/sagernet/sing-mux"
 	vmess "github.com/sagernet/sing-vmess"
 	"github.com/sagernet/sing/common/buf"
 	"github.com/sagernet/sing/common/bufio/deadline"
@@ -56,6 +57,13 @@ func (c *waitCloseConn) Upstream() any {
 	return c.ExtendedConn
 }
 
+func UpstreamMetadata(metadata M.Metadata) M.Metadata {
+	return M.Metadata{
+		Source:      metadata.Source,
+		Destination: metadata.Destination,
+	}
+}
+
 func (h *ListenerHandler) NewConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error {
 	additions := h.Additions
 	if ctxAdditions := getAdditions(ctx); len(ctxAdditions) > 0 {
@@ -63,6 +71,8 @@ func (h *ListenerHandler) NewConnection(ctx context.Context, conn net.Conn, meta
 		additions = append(additions, ctxAdditions...)
 	}
 	switch metadata.Destination.Fqdn {
+	case mux.Destination.Fqdn:
+		return mux.HandleConnection(ctx, h, log.SingLogger, conn, UpstreamMetadata(metadata))
 	case vmess.MuxDestination.Fqdn:
 		return vmess.HandleMuxConnection(ctx, conn, h)
 	case uot.MagicAddress: