add pkgs from core

handler/forward/local/handler.go

@@ -0,0 +1,117 @@
+package local
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net"
+	"time"
+
+	"github.com/go-gost/core/chain"
+	netpkg "github.com/go-gost/core/common/net"
+	"github.com/go-gost/core/handler"
+	md "github.com/go-gost/core/metadata"
+	"github.com/go-gost/x/registry"
+)
+
+func init() {
+	registry.HandlerRegistry().Register("tcp", NewHandler)
+	registry.HandlerRegistry().Register("udp", NewHandler)
+	registry.HandlerRegistry().Register("forward", NewHandler)
+}
+
+type forwardHandler struct {
+	group   *chain.NodeGroup
+	router  *chain.Router
+	md      metadata
+	options handler.Options
+}
+
+func NewHandler(opts ...handler.Option) handler.Handler {
+	options := handler.Options{}
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	return &forwardHandler{
+		options: options,
+	}
+}
+
+func (h *forwardHandler) Init(md md.Metadata) (err error) {
+	if err = h.parseMetadata(md); err != nil {
+		return
+	}
+
+	if h.group == nil {
+		// dummy node used by relay connector.
+		h.group = chain.NewNodeGroup(&chain.Node{Name: "dummy", Addr: ":0"})
+	}
+
+	h.router = h.options.Router
+	if h.router == nil {
+		h.router = (&chain.Router{}).WithLogger(h.options.Logger)
+	}
+
+	return
+}
+
+// Forward implements handler.Forwarder.
+func (h *forwardHandler) Forward(group *chain.NodeGroup) {
+	h.group = group
+}
+
+func (h *forwardHandler) Handle(ctx context.Context, conn net.Conn, opts ...handler.HandleOption) error {
+	defer conn.Close()
+
+	start := time.Now()
+	log := h.options.Logger.WithFields(map[string]any{
+		"remote": conn.RemoteAddr().String(),
+		"local":  conn.LocalAddr().String(),
+	})
+
+	log.Infof("%s <> %s", conn.RemoteAddr(), conn.LocalAddr())
+	defer func() {
+		log.WithFields(map[string]any{
+			"duration": time.Since(start),
+		}).Infof("%s >< %s", conn.RemoteAddr(), conn.LocalAddr())
+	}()
+
+	target := h.group.Next()
+	if target == nil {
+		err := errors.New("target not available")
+		log.Error(err)
+		return err
+	}
+
+	network := "tcp"
+	if _, ok := conn.(net.PacketConn); ok {
+		network = "udp"
+	}
+
+	log = log.WithFields(map[string]any{
+		"dst": fmt.Sprintf("%s/%s", target.Addr, network),
+	})
+
+	log.Infof("%s >> %s", conn.RemoteAddr(), target.Addr)
+
+	cc, err := h.router.Dial(ctx, network, target.Addr)
+	if err != nil {
+		log.Error(err)
+		// TODO: the router itself may be failed due to the failed node in the router,
+		// the dead marker may be a wrong operation.
+		target.Marker.Mark()
+		return err
+	}
+	defer cc.Close()
+	target.Marker.Reset()
+
+	t := time.Now()
+	log.Infof("%s <-> %s", conn.RemoteAddr(), target.Addr)
+	netpkg.Transport(conn, cc)
+	log.WithFields(map[string]any{
+		"duration": time.Since(t),
+	}).Infof("%s >-< %s", conn.RemoteAddr(), target.Addr)
+
+	return nil
+}

handler/forward/local/metadata.go

@@ -0,0 +1,21 @@
+package local
+
+import (
+	"time"
+
+	mdata "github.com/go-gost/core/metadata"
+	mdx "github.com/go-gost/x/metadata"
+)
+
+type metadata struct {
+	readTimeout time.Duration
+}
+
+func (h *forwardHandler) parseMetadata(md mdata.Metadata) (err error) {
+	const (
+		readTimeout = "readTimeout"
+	)
+
+	h.md.readTimeout = mdx.GetDuration(md, readTimeout)
+	return
+}

handler/forward/remote/handler.go

@@ -0,0 +1,111 @@
+package remote
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net"
+	"time"
+
+	"github.com/go-gost/core/chain"
+	netpkg "github.com/go-gost/core/common/net"
+	"github.com/go-gost/core/handler"
+	md "github.com/go-gost/core/metadata"
+	"github.com/go-gost/x/registry"
+)
+
+func init() {
+	registry.HandlerRegistry().Register("rtcp", NewHandler)
+	registry.HandlerRegistry().Register("rudp", NewHandler)
+}
+
+type forwardHandler struct {
+	group   *chain.NodeGroup
+	router  *chain.Router
+	md      metadata
+	options handler.Options
+}
+
+func NewHandler(opts ...handler.Option) handler.Handler {
+	options := handler.Options{}
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	return &forwardHandler{
+		options: options,
+	}
+}
+
+func (h *forwardHandler) Init(md md.Metadata) (err error) {
+	if err = h.parseMetadata(md); err != nil {
+		return
+	}
+
+	h.router = h.options.Router
+	if h.router == nil {
+		h.router = (&chain.Router{}).WithLogger(h.options.Logger)
+	}
+
+	return
+}
+
+// Forward implements handler.Forwarder.
+func (h *forwardHandler) Forward(group *chain.NodeGroup) {
+	h.group = group
+}
+
+func (h *forwardHandler) Handle(ctx context.Context, conn net.Conn, opts ...handler.HandleOption) error {
+	defer conn.Close()
+
+	start := time.Now()
+	log := h.options.Logger.WithFields(map[string]any{
+		"remote": conn.RemoteAddr().String(),
+		"local":  conn.LocalAddr().String(),
+	})
+
+	log.Infof("%s <> %s", conn.RemoteAddr(), conn.LocalAddr())
+	defer func() {
+		log.WithFields(map[string]any{
+			"duration": time.Since(start),
+		}).Infof("%s >< %s", conn.RemoteAddr(), conn.LocalAddr())
+	}()
+
+	target := h.group.Next()
+	if target == nil {
+		err := errors.New("target not available")
+		log.Error(err)
+		return err
+	}
+
+	network := "tcp"
+	if _, ok := conn.(net.PacketConn); ok {
+		network = "udp"
+	}
+
+	log = log.WithFields(map[string]any{
+		"dst": fmt.Sprintf("%s/%s", target.Addr, network),
+	})
+
+	log.Infof("%s >> %s", conn.RemoteAddr(), target.Addr)
+
+	cc, err := h.router.Dial(ctx, network, target.Addr)
+	if err != nil {
+		log.Error(err)
+		// TODO: the router itself may be failed due to the failed node in the router,
+		// the dead marker may be a wrong operation.
+		target.Marker.Mark()
+		return err
+	}
+	defer cc.Close()
+	target.Marker.Reset()
+
+	t := time.Now()
+	log.Infof("%s <-> %s", conn.RemoteAddr(), target.Addr)
+	netpkg.Transport(conn, cc)
+	log.WithFields(map[string]any{
+		"duration": time.Since(t),
+	}).Infof("%s >-< %s", conn.RemoteAddr(), target.Addr)
+
+	return nil
+}

handler/forward/remote/metadata.go

@@ -0,0 +1,21 @@
+package remote
+
+import (
+	"time"
+
+	mdata "github.com/go-gost/core/metadata"
+	mdx "github.com/go-gost/x/metadata"
+)
+
+type metadata struct {
+	readTimeout time.Duration
+}
+
+func (h *forwardHandler) parseMetadata(md mdata.Metadata) (err error) {
+	const (
+		readTimeout = "readTimeout"
+	)
+
+	h.md.readTimeout = mdx.GetDuration(md, readTimeout)
+	return
+}