feat(nordvpn): new API endpoint and wireguard support (#1380)

Co-authored-by: Quentin McGaw <quentin.mcgaw@gmail.com>

internal/configuration/settings/provider.go

@@ -35,6 +35,7 @@ func (p *Provider) validate(vpnType string, storage Storage) (err error) {
 			providers.Custom,
 			providers.Ivpn,
 			providers.Mullvad,
+			providers.Nordvpn,
 			providers.Surfshark,
 			providers.Windscribe,
 		}

internal/configuration/settings/vpn.go

@@ -74,7 +74,7 @@ func (v *VPN) setDefaults() {
 	v.Type = gosettings.DefaultString(v.Type, vpn.OpenVPN)
 	v.Provider.setDefaults()
 	v.OpenVPN.setDefaults(*v.Provider.Name)
-	v.Wireguard.setDefaults()
+	v.Wireguard.setDefaults(*v.Provider.Name)
 }
 
 func (v VPN) String() string {

internal/configuration/settings/wireguard.go

@@ -51,6 +51,7 @@ func (w Wireguard) validate(vpnProvider string, ipv6Supported bool) (err error)
 		providers.Custom,
 		providers.Ivpn,
 		providers.Mullvad,
+		providers.Nordvpn,
 		providers.Surfshark,
 		providers.Windscribe,
 	) {
@@ -140,9 +141,14 @@ func (w *Wireguard) overrideWith(other Wireguard) {
 	w.Implementation = gosettings.OverrideWithString(w.Implementation, other.Implementation)
 }
 
-func (w *Wireguard) setDefaults() {
+func (w *Wireguard) setDefaults(vpnProvider string) {
 	w.PrivateKey = gosettings.DefaultPointer(w.PrivateKey, "")
 	w.PreSharedKey = gosettings.DefaultPointer(w.PreSharedKey, "")
+	if vpnProvider == providers.Nordvpn {
+		defaultNordVPNAddress := netip.AddrFrom4([4]byte{10, 5, 0, 2})
+		defaultNordVPNPrefix := netip.PrefixFrom(defaultNordVPNAddress, defaultNordVPNAddress.BitLen())
+		w.Addresses = gosettings.DefaultSlice(w.Addresses, []netip.Prefix{defaultNordVPNPrefix})
+	}
 	w.Interface = gosettings.DefaultString(w.Interface, "wg0")
 	w.MTU = gosettings.DefaultNumber(w.MTU, wireguarddevice.DefaultMTU)
 	w.Implementation = gosettings.DefaultString(w.Implementation, "auto")

internal/configuration/settings/wireguardselection.go

@@ -38,7 +38,7 @@ func (w WireguardSelection) validate(vpnProvider string) (err error) {
 	// Validate EndpointIP
 	switch vpnProvider {
 	case providers.Airvpn, providers.Ivpn, providers.Mullvad,
-		providers.Surfshark, providers.Windscribe:
+		providers.Nordvpn, providers.Surfshark, providers.Windscribe:
 		// endpoint IP addresses are baked in
 	case providers.Custom:
 		if !w.EndpointIP.IsValid() || w.EndpointIP.IsUnspecified() {
@@ -55,7 +55,7 @@ func (w WireguardSelection) validate(vpnProvider string) (err error) {
 			return fmt.Errorf("%w", ErrWireguardEndpointPortNotSet)
 		}
 	// EndpointPort cannot be set
-	case providers.Surfshark:
+	case providers.Surfshark, providers.Nordvpn:
 		if *w.EndpointPort != 0 {
 			return fmt.Errorf("%w", ErrWireguardEndpointPortSet)
 		}