add hop plugin

hop/example/grpc/main.go

@@ -0,0 +1,80 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"log"
+	"net"
+	"sync/atomic"
+
+	"github.com/go-gost/plugin/hop/proto"
+	"github.com/go-gost/x/config"
+	"google.golang.org/grpc"
+)
+
+var (
+	port = flag.Int("port", 8000, "The server port")
+)
+
+var (
+	nodes = []*config.NodeConfig{
+		{
+			Name: "node-0",
+			Addr: ":8888",
+			Connector: &config.ConnectorConfig{
+				Type: "socks5",
+				Auth: &config.AuthConfig{
+					Username: "user",
+					Password: "pass",
+				},
+			},
+			Dialer: &config.DialerConfig{
+				Type: "tcp",
+			},
+		},
+		{
+			Name: "node-1",
+			Addr: ":9999",
+			Connector: &config.ConnectorConfig{
+				Type: "http",
+				Auth: &config.AuthConfig{
+					Username: "user",
+					Password: "pass",
+				},
+			},
+			Dialer: &config.DialerConfig{
+				Type: "tcp",
+			},
+		},
+	}
+)
+
+type server struct {
+	counter atomic.Uint64
+	proto.UnimplementedHopServer
+}
+
+func (s *server) Select(ctx context.Context, in *proto.SelectRequest) (*proto.SelectReply, error) {
+	node := nodes[s.counter.Add(1)%uint64(len(nodes))]
+	v, _ := json.Marshal(node)
+	reply := &proto.SelectReply{
+		Node: v,
+	}
+	return reply, nil
+}
+
+func main() {
+	flag.Parse()
+	lis, err := net.Listen("tcp", fmt.Sprintf(":%d", *port))
+	if err != nil {
+		log.Fatalf("failed to listen: %v", err)
+	}
+	s := grpc.NewServer()
+	proto.RegisterHopServer(s, &server{})
+	log.Printf("server listening at %v", lis.Addr())
+	if err := s.Serve(lis); err != nil {
+		log.Fatalf("failed to serve: %v", err)
+	}
+}

hop/example/http/main.go

@@ -0,0 +1,93 @@
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"log"
+	"net"
+	"net/http"
+	"sync/atomic"
+
+	"github.com/go-gost/x/config"
+)
+
+var (
+	port = flag.Int("port", 8000, "The server port")
+)
+
+var (
+	nodes = []*config.NodeConfig{
+		{
+			Name: "node-0",
+			Addr: ":8888",
+			Connector: &config.ConnectorConfig{
+				Type: "socks5",
+				Auth: &config.AuthConfig{
+					Username: "user",
+					Password: "pass",
+				},
+			},
+			Dialer: &config.DialerConfig{
+				Type: "tcp",
+			},
+		},
+		{
+			Name: "node-1",
+			Addr: ":9999",
+			Connector: &config.ConnectorConfig{
+				Type: "http",
+				Auth: &config.AuthConfig{
+					Username: "user",
+					Password: "pass",
+				},
+			},
+			Dialer: &config.DialerConfig{
+				Type: "tcp",
+			},
+		},
+	}
+)
+
+type hopRequest struct {
+	Network string `json:"network"`
+	Addr    string `json:"addr"`
+	Host    string `json:"host"`
+	Client  string `json:"client"`
+}
+
+type hopResponse struct {
+	Node string `json:"node"`
+}
+
+func main() {
+	flag.Parse()
+	lis, err := net.Listen("tcp", fmt.Sprintf(":%d", *port))
+	if err != nil {
+		log.Fatalf("failed to listen: %v", err)
+	}
+	log.Printf("server listening at %v", lis.Addr())
+
+	var counter atomic.Uint64
+
+	http.HandleFunc("/hop", func(w http.ResponseWriter, r *http.Request) {
+		rb := hopRequest{}
+		if err := json.NewDecoder(r.Body).Decode(&rb); err != nil {
+			log.Println(err)
+			w.WriteHeader(http.StatusBadRequest)
+			return
+		}
+		log.Printf("hop: %s %s %s %s", rb.Network, rb.Addr, rb.Host, rb.Client)
+
+		node := nodes[counter.Add(1)%uint64(len(nodes))]
+		v, _ := json.Marshal(node)
+
+		resp := hopResponse{Node: string(v)}
+
+		json.NewEncoder(w).Encode(resp)
+	})
+
+	if err := http.Serve(lis, nil); err != nil {
+		log.Fatalf("failed to serve: %v", err)
+	}
+}