add socks

pkg/handler/socks/v5/connect.go

@@ -0,0 +1,57 @@
+package v5
+
+import (
+	"context"
+	"net"
+
+	"github.com/go-gost/gosocks5"
+	"github.com/go-gost/gost/pkg/handler"
+	"github.com/go-gost/gost/pkg/logger"
+)
+
+func (h *socks5Handler) handleConnect(ctx context.Context, conn net.Conn, addr string) {
+	h.logger = h.logger.WithFields(map[string]interface{}{
+		"dst": addr,
+		"cmd": "connect",
+	})
+	h.logger.Infof("%s >> %s", conn.RemoteAddr(), addr)
+
+	if h.bypass != nil && h.bypass.Contains(addr) {
+		resp := gosocks5.NewReply(gosocks5.NotAllowed, nil)
+		resp.Write(conn)
+		if h.logger.IsLevelEnabled(logger.DebugLevel) {
+			h.logger.Debug(resp)
+		}
+		h.logger.Info("bypass: ", addr)
+		return
+	}
+
+	r := (&handler.Router{}).
+		WithChain(h.chain).
+		WithRetry(h.md.retryCount).
+		WithLogger(h.logger)
+	cc, err := r.Dial(ctx, "tcp", addr)
+	if err != nil {
+		resp := gosocks5.NewReply(gosocks5.NetUnreachable, nil)
+		resp.Write(conn)
+		if h.logger.IsLevelEnabled(logger.DebugLevel) {
+			h.logger.Debug(resp)
+		}
+		return
+	}
+
+	defer cc.Close()
+
+	resp := gosocks5.NewReply(gosocks5.Succeeded, nil)
+	if err := resp.Write(conn); err != nil {
+		h.logger.Error(err)
+		return
+	}
+	if h.logger.IsLevelEnabled(logger.DebugLevel) {
+		h.logger.Debug(resp)
+	}
+
+	h.logger.Infof("%s <-> %s", conn.RemoteAddr(), addr)
+	handler.Transport(conn, cc)
+	h.logger.Infof("%s >-< %s", conn.RemoteAddr(), addr)
+}