feat(wireguard): amneziawg implementation (#3150)

internal/wireguard/userspaces.go

@@ -0,0 +1,58 @@
+package wireguard
+
+import (
+	amneziaconn "github.com/amnezia-vpn/amneziawg-go/conn"
+	amneziadevice "github.com/amnezia-vpn/amneziawg-go/device"
+	amneziatun "github.com/amnezia-vpn/amneziawg-go/tun"
+	wgconn "golang.zx2c4.com/wireguard/conn"
+	wgdevice "golang.zx2c4.com/wireguard/device"
+	wgtun "golang.zx2c4.com/wireguard/tun"
+)
+
+func defaultUserSpaceBackend() userSpaceBackend {
+	return userSpaceBackend{
+		createTun: func(name string, mtu int) (tunDevice, error) {
+			return wgtun.CreateTUN(name, mtu)
+		},
+		createBind: func() bind {
+			return wgconn.NewDefaultBind()
+		},
+		createDevice: func(td tunDevice, b bind, logger Logger) userspaceDevice {
+			wgtun, _ := td.(wgtun.Device)
+			wgBind, _ := b.(wgconn.Bind)
+			wgLogger := wgdevice.Logger{
+				Verbosef: logger.Debugf,
+				Errorf:   logger.Errorf,
+			}
+			device := wgdevice.NewDevice(wgtun, wgBind, &wgLogger)
+			return device
+		},
+		preStart: nil,
+	}
+}
+
+func amneziaUserSpaceBackend() userSpaceBackend {
+	return userSpaceBackend{
+		createTun: func(name string, mtu int) (tunDevice, error) {
+			return amneziatun.CreateTUN(name, mtu)
+		},
+		createBind: func() bind {
+			return amneziaconn.NewDefaultBind()
+		},
+		createDevice: func(td tunDevice, b bind, logger Logger) userspaceDevice {
+			wgamneziaTun, _ := td.(amneziatun.Device)
+			wgamneziaBind, _ := b.(amneziaconn.Bind)
+			wgamneziaLogger := amneziadevice.Logger{
+				Verbosef: logger.Debugf,
+				Errorf:   logger.Errorf,
+			}
+			device := amneziadevice.NewDevice(wgamneziaTun, wgamneziaBind, &wgamneziaLogger)
+			return device
+		},
+		preStart: func(ud userspaceDevice, s Settings) error {
+			uapiConfig := s.AmneziaWG.uapiConfig()
+			err := ud.IpcSet(uapiConfig)
+			return err
+		},
+	}
+}