implement default outbound handler

app/proxyman/config.go

@@ -1,5 +1,12 @@
 package proxyman
 
+import (
+	"context"
+	"errors"
+
+	"v2ray.com/core/proxy"
+)
+
 func (s *AllocationStrategy) GetConcurrencyValue() uint32 {
 	if s == nil || s.Concurrency == nil {
 		return 3
@@ -13,3 +20,14 @@ func (s *AllocationStrategy) GetRefreshValue() uint32 {
 	}
 	return s.Refresh.Value
 }
+
+func (c *OutboundHandlerConfig) GetProxyHandler(ctx context.Context) (proxy.OutboundHandler, error) {
+	if c == nil {
+		return nil, errors.New("Proxyman: OutboundHandlerConfig is nil.")
+	}
+	config, err := c.ProxySettings.GetInstance()
+	if err != nil {
+		return nil, err
+	}
+	return proxy.CreateOutboundHandler(ctx, config)
+}

app/proxyman/config.pb.go

@@ -246,6 +246,96 @@ func (m *OutboundConfig) String() string            { return proto.CompactTextSt
 func (*OutboundConfig) ProtoMessage()               {}
 func (*OutboundConfig) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{5} }
 
+type StreamSenderConfig struct {
+	// Send traffic through the given IP. Only IP is allowed.
+	Via            *v2ray_core_common_net.IPOrDomain           `protobuf:"bytes,1,opt,name=via" json:"via,omitempty"`
+	StreamSettings *v2ray_core_transport_internet.StreamConfig `protobuf:"bytes,2,opt,name=stream_settings,json=streamSettings" json:"stream_settings,omitempty"`
+	ProxySettings  *v2ray_core_transport_internet.ProxyConfig  `protobuf:"bytes,3,opt,name=proxy_settings,json=proxySettings" json:"proxy_settings,omitempty"`
+}
+
+func (m *StreamSenderConfig) Reset()                    { *m = StreamSenderConfig{} }
+func (m *StreamSenderConfig) String() string            { return proto.CompactTextString(m) }
+func (*StreamSenderConfig) ProtoMessage()               {}
+func (*StreamSenderConfig) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{6} }
+
+func (m *StreamSenderConfig) GetVia() *v2ray_core_common_net.IPOrDomain {
+	if m != nil {
+		return m.Via
+	}
+	return nil
+}
+
+func (m *StreamSenderConfig) GetStreamSettings() *v2ray_core_transport_internet.StreamConfig {
+	if m != nil {
+		return m.StreamSettings
+	}
+	return nil
+}
+
+func (m *StreamSenderConfig) GetProxySettings() *v2ray_core_transport_internet.ProxyConfig {
+	if m != nil {
+		return m.ProxySettings
+	}
+	return nil
+}
+
+type DatagramSenderConfig struct {
+	// Send traffic through the given IP. Only IP is allowed.
+	Via           *v2ray_core_common_net.IPOrDomain          `protobuf:"bytes,1,opt,name=via" json:"via,omitempty"`
+	ProxySettings *v2ray_core_transport_internet.ProxyConfig `protobuf:"bytes,2,opt,name=proxy_settings,json=proxySettings" json:"proxy_settings,omitempty"`
+}
+
+func (m *DatagramSenderConfig) Reset()                    { *m = DatagramSenderConfig{} }
+func (m *DatagramSenderConfig) String() string            { return proto.CompactTextString(m) }
+func (*DatagramSenderConfig) ProtoMessage()               {}
+func (*DatagramSenderConfig) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
+
+func (m *DatagramSenderConfig) GetVia() *v2ray_core_common_net.IPOrDomain {
+	if m != nil {
+		return m.Via
+	}
+	return nil
+}
+
+func (m *DatagramSenderConfig) GetProxySettings() *v2ray_core_transport_internet.ProxyConfig {
+	if m != nil {
+		return m.ProxySettings
+	}
+	return nil
+}
+
+type OutboundHandlerConfig struct {
+	Tag            string                                   `protobuf:"bytes,1,opt,name=tag" json:"tag,omitempty"`
+	SenderSettings []*v2ray_core_common_serial.TypedMessage `protobuf:"bytes,2,rep,name=sender_settings,json=senderSettings" json:"sender_settings,omitempty"`
+	ProxySettings  *v2ray_core_common_serial.TypedMessage   `protobuf:"bytes,3,opt,name=proxy_settings,json=proxySettings" json:"proxy_settings,omitempty"`
+}
+
+func (m *OutboundHandlerConfig) Reset()                    { *m = OutboundHandlerConfig{} }
+func (m *OutboundHandlerConfig) String() string            { return proto.CompactTextString(m) }
+func (*OutboundHandlerConfig) ProtoMessage()               {}
+func (*OutboundHandlerConfig) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{8} }
+
+func (m *OutboundHandlerConfig) GetTag() string {
+	if m != nil {
+		return m.Tag
+	}
+	return ""
+}
+
+func (m *OutboundHandlerConfig) GetSenderSettings() []*v2ray_core_common_serial.TypedMessage {
+	if m != nil {
+		return m.SenderSettings
+	}
+	return nil
+}
+
+func (m *OutboundHandlerConfig) GetProxySettings() *v2ray_core_common_serial.TypedMessage {
+	if m != nil {
+		return m.ProxySettings
+	}
+	return nil
+}
+
 func init() {
 	proto.RegisterType((*InboundConfig)(nil), "v2ray.core.app.proxyman.InboundConfig")
 	proto.RegisterType((*AllocationStrategy)(nil), "v2ray.core.app.proxyman.AllocationStrategy")
@@ -255,49 +345,57 @@ func init() {
 	proto.RegisterType((*DatagramReceiverConfig)(nil), "v2ray.core.app.proxyman.DatagramReceiverConfig")
 	proto.RegisterType((*InboundHandlerConfig)(nil), "v2ray.core.app.proxyman.InboundHandlerConfig")
 	proto.RegisterType((*OutboundConfig)(nil), "v2ray.core.app.proxyman.OutboundConfig")
+	proto.RegisterType((*StreamSenderConfig)(nil), "v2ray.core.app.proxyman.StreamSenderConfig")
+	proto.RegisterType((*DatagramSenderConfig)(nil), "v2ray.core.app.proxyman.DatagramSenderConfig")
+	proto.RegisterType((*OutboundHandlerConfig)(nil), "v2ray.core.app.proxyman.OutboundHandlerConfig")
 	proto.RegisterEnum("v2ray.core.app.proxyman.AllocationStrategy_Type", AllocationStrategy_Type_name, AllocationStrategy_Type_value)
 }
 
 func init() { proto.RegisterFile("v2ray.com/core/app/proxyman/config.proto", fileDescriptor0) }
 
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+	// 683 bytes of a gzipped FileDescriptorProto
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 }

app/proxyman/config.proto

@@ -73,11 +73,13 @@ message StreamSenderConfig {
   // Send traffic through the given IP. Only IP is allowed.
   v2ray.core.common.net.IPOrDomain via = 1;
   v2ray.core.transport.internet.StreamConfig stream_settings = 2;
+  v2ray.core.transport.internet.ProxyConfig proxy_settings = 3;
 }
 
 message DatagramSenderConfig {
   // Send traffic through the given IP. Only IP is allowed.
   v2ray.core.common.net.IPOrDomain via = 1;
+  v2ray.core.transport.internet.ProxyConfig proxy_settings = 2;
 }
 
 message OutboundHandlerConfig {

app/proxyman/outbound/handler.go

@@ -0,0 +1,81 @@
+package outbound
+
+import (
+	"context"
+
+	"v2ray.com/core/app/proxyman"
+	"v2ray.com/core/common/errors"
+	"v2ray.com/core/common/net"
+	"v2ray.com/core/proxy"
+	"v2ray.com/core/transport/internet"
+)
+
+type Handler struct {
+	config           *proxyman.OutboundHandlerConfig
+	streamSettings   *proxyman.StreamSenderConfig
+	datagramSettings *proxyman.DatagramSenderConfig
+	proxy            proxy.OutboundHandler
+}
+
+func NewHandler(ctx context.Context, config *proxyman.OutboundHandlerConfig) (*Handler, error) {
+	h := &Handler{
+		config: config,
+	}
+	for _, rawSettings := range config.SenderSettings {
+		settings, err := rawSettings.GetInstance()
+		if err != nil {
+			return nil, err
+		}
+		switch ts := settings.(type) {
+		case *proxyman.StreamSenderConfig:
+			h.streamSettings = ts
+		case *proxyman.DatagramSenderConfig:
+			h.datagramSettings = ts
+		default:
+			return nil, errors.New("Proxyman|DefaultOutboundHandler: Unknown sender settings: ", rawSettings.Type)
+		}
+	}
+	proxyHandler, err := config.GetProxyHandler(proxy.ContextWithDialer(ctx, h))
+	if err != nil {
+		return nil, err
+	}
+
+	h.proxy = proxyHandler
+	return h, nil
+}
+
+func (h *Handler) Dial(ctx context.Context, destination net.Destination) (internet.Connection, error) {
+	switch destination.Network {
+	case net.Network_TCP:
+		return h.dialStream(ctx, destination)
+	case net.Network_UDP:
+		return h.dialDatagram(ctx, destination)
+	default:
+		panic("Proxyman|DefaultOutboundHandler: unexpected network.")
+	}
+}
+
+func (h *Handler) dialStream(ctx context.Context, destination net.Destination) (internet.Connection, error) {
+	var src net.Address
+	if h.streamSettings != nil {
+		src = h.streamSettings.Via.AsAddress()
+	}
+	var options internet.DialerOptions
+	if h.streamSettings != nil {
+		options.Proxy = h.streamSettings.ProxySettings
+		options.Stream = h.streamSettings.StreamSettings
+	}
+	return internet.Dial(src, destination, options)
+}
+
+func (h *Handler) dialDatagram(ctx context.Context, destination net.Destination) (internet.Connection, error) {
+	var src net.Address
+	if h.datagramSettings != nil {
+		src = h.datagramSettings.Via.AsAddress()
+	}
+	var options internet.DialerOptions
+	if h.datagramSettings != nil {
+		options.Proxy = h.datagramSettings.ProxySettings
+	}
+	return internet.Dial(src, destination, options)
+}

app/proxyman/outbound/outbound.go

@@ -1,9 +1,8 @@
 package outbound
 
 import (
-	"sync"
-
 	"context"
+	"sync"
 
 	"v2ray.com/core/app/proxyman"
 	"v2ray.com/core/common"

app/proxyman/proxyman.go

@@ -2,8 +2,12 @@
 package proxyman
 
 import (
+	"context"
+
 	"v2ray.com/core/app"
+	"v2ray.com/core/common/net"
 	"v2ray.com/core/proxy"
+	"v2ray.com/core/transport/ray"
 )
 
 type InboundHandlerManager interface {
@@ -11,7 +15,6 @@ type InboundHandlerManager interface {
 }
 
 type InboundHandler interface {
-	
 }
 
 type OutboundHandlerManager interface {
@@ -21,6 +24,10 @@ type OutboundHandlerManager interface {
 	SetHandler(tag string, handler proxy.OutboundHandler) error
 }
 
+type OutboundHandler interface {
+	Dispatch(ctx context.Context, destination net.Destination, outboundRay ray.OutboundRay)
+}
+
 func InboundHandlerManagerFromSpace(space app.Space) InboundHandlerManager {
 	app := space.GetApplication((*InboundHandlerManager)(nil))
 	if app == nil {

proxy/context.go

@@ -7,8 +7,9 @@ import (
 type key int
 
 const (
-	inboundMetaKey  = key(0)
+	inboundMetaKey key = iota
-	outboundMetaKey = key(1)
+	outboundMetaKey
+	dialerKey
 )
 
 func ContextWithInboundMeta(ctx context.Context, meta *InboundHandlerMeta) context.Context {
@@ -34,3 +35,15 @@ func OutboundMetaFromContext(ctx context.Context) *OutboundHandlerMeta {
 	}
 	return v.(*OutboundHandlerMeta)
 }
+
+func ContextWithDialer(ctx context.Context, dialer Dialer) context.Context {
+	return context.WithValue(ctx, dialerKey, dialer)
+}
+
+func DialerFromContext(ctx context.Context) Dialer {
+	v := ctx.Value(dialerKey)
+	if v == nil {
+		return nil
+	}
+	return v.(Dialer)
+}