Maint: common no port forwarding implementation

internal/provider/nordvpn/portforward.go

@@ -1,16 +0,0 @@
-package nordvpn
-
-import (
-	"context"
-	"net"
-	"net/http"
-
-	"github.com/qdm12/gluetun/internal/firewall"
-	"github.com/qdm12/golibs/logging"
-)
-
-func (n *Nordvpn) PortForward(ctx context.Context, client *http.Client,
-	pfLogger logging.Logger, gateway net.IP, portAllower firewall.PortAllower,
-	syncState func(port uint16) (pfFilepath string)) {
-	panic("port forwarding is not supported for NordVPN")
-}

internal/provider/nordvpn/provider.go

@@ -3,17 +3,21 @@ package nordvpn
 import (
 	"math/rand"
 
+	"github.com/qdm12/gluetun/internal/constants"
 	"github.com/qdm12/gluetun/internal/models"
+	"github.com/qdm12/gluetun/internal/provider/utils"
 )
 
 type Nordvpn struct {
 	servers    []models.NordvpnServer
 	randSource rand.Source
+	utils.NoPortForwarder
 }
 
 func New(servers []models.NordvpnServer, randSource rand.Source) *Nordvpn {
 	return &Nordvpn{
-		servers:    servers,
-		randSource: randSource,
+		servers:         servers,
+		randSource:      randSource,
+		NoPortForwarder: utils.NewNoPortForwarding(constants.Nordvpn),
 	}
 }