add handler error metrics

pkg/handler/socks/v5/connect.go

@@ -7,11 +7,11 @@ import (
 	"time"
 
 	"github.com/go-gost/gosocks5"
-	"github.com/go-gost/gost/pkg/handler"
+	netpkg "github.com/go-gost/gost/pkg/common/net"
 	"github.com/go-gost/gost/pkg/logger"
 )
 
-func (h *socks5Handler) handleConnect(ctx context.Context, conn net.Conn, network, address string, log logger.Logger) {
+func (h *socks5Handler) handleConnect(ctx context.Context, conn net.Conn, network, address string, log logger.Logger) error {
 	log = log.WithFields(map[string]any{
 		"dst": fmt.Sprintf("%s/%s", address, network),
 		"cmd": "connect",
@@ -20,18 +20,17 @@ func (h *socks5Handler) handleConnect(ctx context.Context, conn net.Conn, networ
 
 	if h.options.Bypass != nil && h.options.Bypass.Contains(address) {
 		resp := gosocks5.NewReply(gosocks5.NotAllowed, nil)
-		resp.Write(conn)
 		log.Debug(resp)
 		log.Info("bypass: ", address)
-		return
+		return resp.Write(conn)
 	}
 
 	cc, err := h.router.Dial(ctx, network, address)
 	if err != nil {
 		resp := gosocks5.NewReply(gosocks5.NetUnreachable, nil)
-		resp.Write(conn)
 		log.Debug(resp)
-		return
+		resp.Write(conn)
+		return err
 	}
 
 	defer cc.Close()
@@ -39,14 +38,16 @@ func (h *socks5Handler) handleConnect(ctx context.Context, conn net.Conn, networ
 	resp := gosocks5.NewReply(gosocks5.Succeeded, nil)
 	if err := resp.Write(conn); err != nil {
 		log.Error(err)
-		return
+		return err
 	}
 	log.Debug(resp)
 
 	t := time.Now()
 	log.Infof("%s <-> %s", conn.RemoteAddr(), address)
-	handler.Transport(conn, cc)
+	netpkg.Transport(conn, cc)
 	log.WithFields(map[string]any{
 		"duration": time.Since(t),
 	}).Infof("%s >-< %s", conn.RemoteAddr(), address)
+
+	return nil
 }