chore(constants): internal/constants/providers

- New package to avoid package import cycles

internal/cli/formatservers.go

@@ -8,6 +8,7 @@ import (
 	"path/filepath"
 
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/storage"
 )
 
@@ -28,26 +29,26 @@ func (c *CLI) FormatServers(args []string) error {
 	flagSet := flag.NewFlagSet("markdown", flag.ExitOnError)
 	flagSet.StringVar(&format, "format", "markdown", "Format to use which can be: 'markdown'")
 	flagSet.StringVar(&output, "output", "/dev/stdout", "Output file to write the formatted data to")
-	flagSet.BoolVar(&cyberghost, "cyberghost", false, "Format Cyberghost servers")
-	flagSet.BoolVar(&expressvpn, "expressvpn", false, "Format ExpressVPN servers")
-	flagSet.BoolVar(&fastestvpn, "fastestvpn", false, "Format FastestVPN servers")
-	flagSet.BoolVar(&hideMyAss, "hidemyass", false, "Format HideMyAss servers")
-	flagSet.BoolVar(&ipvanish, "ipvanish", false, "Format IpVanish servers")
-	flagSet.BoolVar(&ivpn, "ivpn", false, "Format IVPN servers")
-	flagSet.BoolVar(&mullvad, "mullvad", false, "Format Mullvad servers")
-	flagSet.BoolVar(&nordvpn, "nordvpn", false, "Format Nordvpn servers")
-	flagSet.BoolVar(&perfectPrivacy, "perfectprivacy", false, "Format Perfect Privacy servers")
-	flagSet.BoolVar(&pia, "pia", false, "Format Private Internet Access servers")
-	flagSet.BoolVar(&privado, "privado", false, "Format Privado servers")
-	flagSet.BoolVar(&privatevpn, "privatevpn", false, "Format Private VPN servers")
-	flagSet.BoolVar(&protonvpn, "protonvpn", false, "Format Protonvpn servers")
-	flagSet.BoolVar(&purevpn, "purevpn", false, "Format Purevpn servers")
-	flagSet.BoolVar(&surfshark, "surfshark", false, "Format Surfshark servers")
-	flagSet.BoolVar(&torguard, "torguard", false, "Format Torguard servers")
-	flagSet.BoolVar(&vpnUnlimited, "vpnunlimited", false, "Format VPN Unlimited servers")
-	flagSet.BoolVar(&vyprvpn, "vyprvpn", false, "Format Vyprvpn servers")
-	flagSet.BoolVar(&wevpn, "wevpn", false, "Format WeVPN servers")
-	flagSet.BoolVar(&windscribe, "windscribe", false, "Format Windscribe servers")
+	flagSet.BoolVar(&cyberghost, providers.Cyberghost, false, "Format Cyberghost servers")
+	flagSet.BoolVar(&expressvpn, providers.Expressvpn, false, "Format ExpressVPN servers")
+	flagSet.BoolVar(&fastestvpn, providers.Fastestvpn, false, "Format FastestVPN servers")
+	flagSet.BoolVar(&hideMyAss, providers.HideMyAss, false, "Format HideMyAss servers")
+	flagSet.BoolVar(&ipvanish, providers.Ipvanish, false, "Format IpVanish servers")
+	flagSet.BoolVar(&ivpn, providers.Ivpn, false, "Format IVPN servers")
+	flagSet.BoolVar(&mullvad, providers.Mullvad, false, "Format Mullvad servers")
+	flagSet.BoolVar(&nordvpn, providers.Nordvpn, false, "Format Nordvpn servers")
+	flagSet.BoolVar(&perfectPrivacy, providers.Perfectprivacy, false, "Format Perfect Privacy servers")
+	flagSet.BoolVar(&pia, providers.PrivateInternetAccess, false, "Format Private Internet Access servers")
+	flagSet.BoolVar(&privado, providers.Privado, false, "Format Privado servers")
+	flagSet.BoolVar(&privatevpn, providers.Privatevpn, false, "Format Private VPN servers")
+	flagSet.BoolVar(&protonvpn, providers.Protonvpn, false, "Format Protonvpn servers")
+	flagSet.BoolVar(&purevpn, providers.Purevpn, false, "Format Purevpn servers")
+	flagSet.BoolVar(&surfshark, providers.Surfshark, false, "Format Surfshark servers")
+	flagSet.BoolVar(&torguard, providers.Torguard, false, "Format Torguard servers")
+	flagSet.BoolVar(&vpnUnlimited, providers.VPNUnlimited, false, "Format VPN Unlimited servers")
+	flagSet.BoolVar(&vyprvpn, providers.Vyprvpn, false, "Format Vyprvpn servers")
+	flagSet.BoolVar(&wevpn, providers.Wevpn, false, "Format WeVPN servers")
+	flagSet.BoolVar(&windscribe, providers.Windscribe, false, "Format Windscribe servers")
 	if err := flagSet.Parse(args); err != nil {
 		return err
 	}

internal/cli/update.go

@@ -14,6 +14,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/storage"
 	"github.com/qdm12/gluetun/internal/updater"
@@ -62,8 +63,8 @@ func (c *CLI) Update(ctx context.Context, args []string, logger UpdaterLogger) e
 	}
 
 	if updateAll {
-		for _, provider := range constants.AllProviders() {
-			if provider == constants.Custom {
+		for _, provider := range providers.All() {
+			if provider == providers.Custom {
 				continue
 			}
 			options.Providers = append(options.Providers, provider)

internal/configuration/settings/openvpn.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings/helpers"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/openvpn/parse"
 	"github.com/qdm12/gotree"
 )
@@ -84,14 +85,14 @@ func (o OpenVPN) validate(vpnProvider string) (err error) {
 			ErrOpenVPNVersionIsNotValid, o.Version, strings.Join(validVersions, ", "))
 	}
 
-	isCustom := vpnProvider == constants.Custom
+	isCustom := vpnProvider == providers.Custom
 
 	if !isCustom && o.User == "" {
 		return ErrOpenVPNUserIsEmpty
 	}
 
 	passwordRequired := !isCustom &&
-		(vpnProvider != constants.Ivpn || !ivpnAccountID.MatchString(o.User))
+		(vpnProvider != providers.Ivpn || !ivpnAccountID.MatchString(o.User))
 
 	if passwordRequired && o.Password == "" {
 		return ErrOpenVPNPasswordIsEmpty
@@ -153,8 +154,8 @@ func validateOpenVPNClientCertificate(vpnProvider,
 	clientCert string) (err error) {
 	switch vpnProvider {
 	case
-		constants.Cyberghost,
-		constants.VPNUnlimited:
+		providers.Cyberghost,
+		providers.VPNUnlimited:
 		if clientCert == "" {
 			return ErrMissingValue
 		}
@@ -174,9 +175,9 @@ func validateOpenVPNClientCertificate(vpnProvider,
 func validateOpenVPNClientKey(vpnProvider, clientKey string) (err error) {
 	switch vpnProvider {
 	case
-		constants.Cyberghost,
-		constants.VPNUnlimited,
-		constants.Wevpn:
+		providers.Cyberghost,
+		providers.VPNUnlimited,
+		providers.Wevpn:
 		if clientKey == "" {
 			return ErrMissingValue
 		}
@@ -256,7 +257,7 @@ func (o *OpenVPN) overrideWith(other OpenVPN) {
 
 func (o *OpenVPN) setDefaults(vpnProvider string) {
 	o.Version = helpers.DefaultString(o.Version, constants.Openvpn25)
-	if vpnProvider == constants.Mullvad {
+	if vpnProvider == providers.Mullvad {
 		o.Password = "m"
 	}
 
@@ -266,7 +267,7 @@ func (o *OpenVPN) setDefaults(vpnProvider string) {
 	o.ClientKey = helpers.DefaultStringPtr(o.ClientKey, "")
 
 	var defaultEncPreset string
-	if vpnProvider == constants.PrivateInternetAccess {
+	if vpnProvider == providers.PrivateInternetAccess {
 		defaultEncPreset = constants.PIAEncryptionPresetStrong
 	}
 	o.PIAEncPreset = helpers.DefaultStringPtr(o.PIAEncPreset, defaultEncPreset)

internal/configuration/settings/openvpnselection.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings/helpers"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gotree"
 )
 
@@ -39,11 +40,11 @@ func (o OpenVPNSelection) validate(vpnProvider string) (err error) {
 
 	// Validate TCP
 	if *o.TCP && helpers.IsOneOf(vpnProvider,
-		constants.Ipvanish,
-		constants.Perfectprivacy,
-		constants.Privado,
-		constants.VPNUnlimited,
-		constants.Vyprvpn,
+		providers.Ipvanish,
+		providers.Perfectprivacy,
+		providers.Privado,
+		providers.VPNUnlimited,
+		providers.Vyprvpn,
 	) {
 		return fmt.Errorf("%w: for VPN service provider %s",
 			ErrOpenVPNTCPNotSupported, vpnProvider)
@@ -53,33 +54,33 @@ func (o OpenVPNSelection) validate(vpnProvider string) (err error) {
 	if *o.CustomPort != 0 {
 		switch vpnProvider {
 		// no restriction on port
-		case constants.Cyberghost, constants.HideMyAss,
-			constants.PrivateInternetAccess, constants.Privatevpn,
-			constants.Protonvpn, constants.Torguard:
+		case providers.Cyberghost, providers.HideMyAss,
+			providers.PrivateInternetAccess, providers.Privatevpn,
+			providers.Protonvpn, providers.Torguard:
 		// no custom port allowed
-		case constants.Expressvpn, constants.Fastestvpn,
-			constants.Ipvanish, constants.Nordvpn,
-			constants.Privado, constants.Purevpn,
-			constants.Surfshark, constants.VPNUnlimited,
-			constants.Vyprvpn:
+		case providers.Expressvpn, providers.Fastestvpn,
+			providers.Ipvanish, providers.Nordvpn,
+			providers.Privado, providers.Purevpn,
+			providers.Surfshark, providers.VPNUnlimited,
+			providers.Vyprvpn:
 			return fmt.Errorf("%w: for VPN service provider %s",
 				ErrOpenVPNCustomPortNotAllowed, vpnProvider)
 		default:
 			var allowedTCP, allowedUDP []uint16
 			switch vpnProvider {
-			case constants.Ivpn:
+			case providers.Ivpn:
 				allowedTCP = []uint16{80, 443, 1143}
 				allowedUDP = []uint16{53, 1194, 2049, 2050}
-			case constants.Mullvad:
+			case providers.Mullvad:
 				allowedTCP = []uint16{80, 443, 1401}
 				allowedUDP = []uint16{53, 1194, 1195, 1196, 1197, 1300, 1301, 1302, 1303, 1400}
-			case constants.Perfectprivacy:
+			case providers.Perfectprivacy:
 				allowedTCP = []uint16{44, 443, 4433}
 				allowedUDP = []uint16{44, 443, 4433}
-			case constants.Wevpn:
+			case providers.Wevpn:
 				allowedTCP = []uint16{53, 1195, 1199, 2018}
 				allowedUDP = []uint16{80, 1194, 1198}
-			case constants.Windscribe:
+			case providers.Windscribe:
 				allowedTCP = []uint16{21, 22, 80, 123, 143, 443, 587, 1194, 3306, 8080, 54783}
 				allowedUDP = []uint16{53, 80, 123, 443, 1194, 54783}
 			}
@@ -97,7 +98,7 @@ func (o OpenVPNSelection) validate(vpnProvider string) (err error) {
 	}
 
 	// Validate EncPreset
-	if vpnProvider == constants.PrivateInternetAccess {
+	if vpnProvider == providers.PrivateInternetAccess {
 		validEncryptionPresets := []string{
 			constants.PIAEncryptionPresetNone,
 			constants.PIAEncryptionPresetNormal,
@@ -142,7 +143,7 @@ func (o *OpenVPNSelection) setDefaults(vpnProvider string) {
 	o.CustomPort = helpers.DefaultUint16(o.CustomPort, 0)
 
 	var defaultEncPreset string
-	if vpnProvider == constants.PrivateInternetAccess {
+	if vpnProvider == providers.PrivateInternetAccess {
 		defaultEncPreset = constants.PIAEncryptionPresetStrong
 	}
 	o.PIAEncPreset = helpers.DefaultStringPtr(o.PIAEncPreset, defaultEncPreset)

internal/configuration/settings/portforward.go

@@ -6,7 +6,7 @@ import (
 	"strings"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings/helpers"
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gotree"
 )
 
@@ -28,7 +28,7 @@ func (p PortForwarding) validate(vpnProvider string) (err error) {
 	}
 
 	// Validate Enabled
-	validProviders := []string{constants.PrivateInternetAccess}
+	validProviders := []string{providers.PrivateInternetAccess}
 	if !helpers.IsOneOf(vpnProvider, validProviders...) {
 		return fmt.Errorf("%w: for provider %s, it is only available for %s",
 			ErrPortForwardingEnabled, vpnProvider, strings.Join(validProviders, ", "))

internal/configuration/settings/provider.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings/helpers"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gotree"
 )
@@ -26,14 +27,14 @@ func (p *Provider) validate(vpnType string, allServers models.AllServers) (err e
 	// Validate Name
 	var validNames []string
 	if vpnType == constants.OpenVPN {
-		validNames = constants.AllProviders()
+		validNames = providers.All()
 		validNames = append(validNames, "pia") // Retro-compatibility
 	} else { // Wireguard
 		validNames = []string{
-			constants.Custom,
-			constants.Ivpn,
-			constants.Mullvad,
-			constants.Windscribe,
+			providers.Custom,
+			providers.Ivpn,
+			providers.Mullvad,
+			providers.Windscribe,
 		}
 	}
 	if !helpers.IsOneOf(*p.Name, validNames...) {
@@ -75,7 +76,7 @@ func (p *Provider) overrideWith(other Provider) {
 }
 
 func (p *Provider) setDefaults() {
-	p.Name = helpers.DefaultStringPtr(p.Name, constants.PrivateInternetAccess)
+	p.Name = helpers.DefaultStringPtr(p.Name, providers.PrivateInternetAccess)
 	p.ServerSelection.setDefaults(*p.Name)
 	p.PortForwarding.setDefaults()
 }

internal/configuration/settings/serverselection.go

@@ -9,6 +9,7 @@ import (
 	"github.com/qdm12/gluetun/internal/configuration/settings/helpers"
 	"github.com/qdm12/gluetun/internal/configuration/settings/validation"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gotree"
 )
@@ -90,15 +91,15 @@ func (ss *ServerSelection) validate(vpnServiceProvider string,
 	}
 
 	if *ss.OwnedOnly &&
-		vpnServiceProvider != constants.Mullvad {
+		vpnServiceProvider != providers.Mullvad {
 		return fmt.Errorf("%w: for VPN service provider %s",
 			ErrOwnedOnlyNotSupported, vpnServiceProvider)
 	}
 
 	if *ss.FreeOnly &&
 		!helpers.IsOneOf(vpnServiceProvider,
-			constants.Protonvpn,
-			constants.VPNUnlimited,
+			providers.Protonvpn,
+			providers.VPNUnlimited,
 		) {
 		return fmt.Errorf("%w: for VPN service provider %s",
 			ErrFreeOnlyNotSupported, vpnServiceProvider)
@@ -106,15 +107,15 @@ func (ss *ServerSelection) validate(vpnServiceProvider string,
 
 	if *ss.StreamOnly &&
 		!helpers.IsOneOf(vpnServiceProvider,
-			constants.Protonvpn,
-			constants.VPNUnlimited,
+			providers.Protonvpn,
+			providers.VPNUnlimited,
 		) {
 		return fmt.Errorf("%w: for VPN service provider %s",
 			ErrStreamOnlyNotSupported, vpnServiceProvider)
 	}
 
 	if *ss.MultiHopOnly &&
-		vpnServiceProvider != constants.Surfshark {
+		vpnServiceProvider != providers.Surfshark {
 		return fmt.Errorf("%w: for VPN service provider %s",
 			ErrMultiHopOnlyNotSupported, vpnServiceProvider)
 	}
@@ -140,80 +141,80 @@ func getLocationFilterChoices(vpnServiceProvider string, ss *ServerSelection,
 	ispChoices, nameChoices, hostnameChoices []string,
 	err error) {
 	switch vpnServiceProvider {
-	case constants.Custom:
-	case constants.Cyberghost:
+	case providers.Custom:
+	case providers.Cyberghost:
 		servers := allServers.GetCyberghost()
 		countryChoices = validation.CyberghostCountryChoices(servers)
 		hostnameChoices = validation.CyberghostHostnameChoices(servers)
-	case constants.Expressvpn:
+	case providers.Expressvpn:
 		servers := allServers.GetExpressvpn()
 		countryChoices = validation.ExpressvpnCountriesChoices(servers)
 		cityChoices = validation.ExpressvpnCityChoices(servers)
 		hostnameChoices = validation.ExpressvpnHostnameChoices(servers)
-	case constants.Fastestvpn:
+	case providers.Fastestvpn:
 		servers := allServers.GetFastestvpn()
 		countryChoices = validation.FastestvpnCountriesChoices(servers)
 		hostnameChoices = validation.FastestvpnHostnameChoices(servers)
-	case constants.HideMyAss:
+	case providers.HideMyAss:
 		servers := allServers.GetHideMyAss()
 		countryChoices = validation.HideMyAssCountryChoices(servers)
 		regionChoices = validation.HideMyAssRegionChoices(servers)
 		cityChoices = validation.HideMyAssCityChoices(servers)
 		hostnameChoices = validation.HideMyAssHostnameChoices(servers)
-	case constants.Ipvanish:
+	case providers.Ipvanish:
 		servers := allServers.GetIpvanish()
 		countryChoices = validation.IpvanishCountryChoices(servers)
 		cityChoices = validation.IpvanishCityChoices(servers)
 		hostnameChoices = validation.IpvanishHostnameChoices(servers)
-	case constants.Ivpn:
+	case providers.Ivpn:
 		servers := allServers.GetIvpn()
 		countryChoices = validation.IvpnCountryChoices(servers)
 		cityChoices = validation.IvpnCityChoices(servers)
 		ispChoices = validation.IvpnISPChoices(servers)
 		hostnameChoices = validation.IvpnHostnameChoices(servers)
-	case constants.Mullvad:
+	case providers.Mullvad:
 		servers := allServers.GetMullvad()
 		countryChoices = validation.MullvadCountryChoices(servers)
 		cityChoices = validation.MullvadCityChoices(servers)
 		ispChoices = validation.MullvadISPChoices(servers)
 		hostnameChoices = validation.MullvadHostnameChoices(servers)
-	case constants.Nordvpn:
+	case providers.Nordvpn:
 		servers := allServers.GetNordvpn()
 		regionChoices = validation.NordvpnRegionChoices(servers)
 		hostnameChoices = validation.NordvpnHostnameChoices(servers)
-	case constants.Perfectprivacy:
+	case providers.Perfectprivacy:
 		servers := allServers.GetPerfectprivacy()
 		cityChoices = validation.PerfectprivacyCityChoices(servers)
-	case constants.Privado:
+	case providers.Privado:
 		servers := allServers.GetPrivado()
 		countryChoices = validation.PrivadoCountryChoices(servers)
 		regionChoices = validation.PrivadoRegionChoices(servers)
 		cityChoices = validation.PrivadoCityChoices(servers)
 		hostnameChoices = validation.PrivadoHostnameChoices(servers)
-	case constants.PrivateInternetAccess:
+	case providers.PrivateInternetAccess:
 		servers := allServers.GetPia()
 		regionChoices = validation.PIAGeoChoices(servers)
 		hostnameChoices = validation.PIAHostnameChoices(servers)
 		nameChoices = validation.PIANameChoices(servers)
-	case constants.Privatevpn:
+	case providers.Privatevpn:
 		servers := allServers.GetPrivatevpn()
 		countryChoices = validation.PrivatevpnCountryChoices(servers)
 		cityChoices = validation.PrivatevpnCityChoices(servers)
 		hostnameChoices = validation.PrivatevpnHostnameChoices(servers)
-	case constants.Protonvpn:
+	case providers.Protonvpn:
 		servers := allServers.GetProtonvpn()
 		countryChoices = validation.ProtonvpnCountryChoices(servers)
 		regionChoices = validation.ProtonvpnRegionChoices(servers)
 		cityChoices = validation.ProtonvpnCityChoices(servers)
 		nameChoices = validation.ProtonvpnNameChoices(servers)
 		hostnameChoices = validation.ProtonvpnHostnameChoices(servers)
-	case constants.Purevpn:
+	case providers.Purevpn:
 		servers := allServers.GetPurevpn()
 		countryChoices = validation.PurevpnCountryChoices(servers)
 		regionChoices = validation.PurevpnRegionChoices(servers)
 		cityChoices = validation.PurevpnCityChoices(servers)
 		hostnameChoices = validation.PurevpnHostnameChoices(servers)
-	case constants.Surfshark:
+	case providers.Surfshark:
 		servers := allServers.GetSurfshark()
 		countryChoices = validation.SurfsharkCountryChoices(servers)
 		cityChoices = validation.SurfsharkCityChoices(servers)
@@ -227,24 +228,24 @@ func getLocationFilterChoices(vpnServiceProvider string, ss *ServerSelection,
 		// Retro compatibility
 		// TODO remove in v4
 		*ss = surfsharkRetroRegion(*ss)
-	case constants.Torguard:
+	case providers.Torguard:
 		servers := allServers.GetTorguard()
 		countryChoices = validation.TorguardCountryChoices(servers)
 		cityChoices = validation.TorguardCityChoices(servers)
 		hostnameChoices = validation.TorguardHostnameChoices(servers)
-	case constants.VPNUnlimited:
+	case providers.VPNUnlimited:
 		servers := allServers.GetVPNUnlimited()
 		countryChoices = validation.VPNUnlimitedCountryChoices(servers)
 		cityChoices = validation.VPNUnlimitedCityChoices(servers)
 		hostnameChoices = validation.VPNUnlimitedHostnameChoices(servers)
-	case constants.Vyprvpn:
+	case providers.Vyprvpn:
 		servers := allServers.GetVyprvpn()
 		regionChoices = validation.VyprvpnRegionChoices(servers)
-	case constants.Wevpn:
+	case providers.Wevpn:
 		servers := allServers.GetWevpn()
 		cityChoices = validation.WevpnCityChoices(servers)
 		hostnameChoices = validation.WevpnHostnameChoices(servers)
-	case constants.Windscribe:
+	case providers.Windscribe:
 		servers := allServers.GetWindscribe()
 		regionChoices = validation.WindscribeRegionChoices(servers)
 		cityChoices = validation.WindscribeCityChoices(servers)

internal/configuration/settings/updater.go

@@ -7,7 +7,7 @@ import (
 	"time"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings/helpers"
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gotree"
 )
 
@@ -42,8 +42,8 @@ func (u Updater) Validate() (err error) {
 
 	for i, provider := range u.Providers {
 		valid := false
-		for _, validProvider := range constants.AllProviders() {
-			if validProvider == constants.Custom {
+		for _, validProvider := range providers.All() {
+			if validProvider == providers.Custom {
 				continue
 			}
 
@@ -93,7 +93,7 @@ func (u *Updater) SetDefaults(vpnProvider string) {
 	u.Period = helpers.DefaultDuration(u.Period, 0)
 	u.DNSAddress = helpers.DefaultIP(u.DNSAddress, net.IPv4(1, 1, 1, 1))
 	u.CLI = helpers.DefaultBool(u.CLI, false)
-	if len(u.Providers) == 0 && vpnProvider != constants.Custom {
+	if len(u.Providers) == 0 && vpnProvider != providers.Custom {
 		u.Providers = []string{vpnProvider}
 	}
 }

internal/configuration/settings/wireguard.go

@@ -6,7 +6,7 @@ import (
 	"regexp"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings/helpers"
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gotree"
 	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
 )
@@ -35,10 +35,10 @@ var regexpInterfaceName = regexp.MustCompile(`^[a-zA-Z0-9_]+$`)
 // It should only be ran if the VPN type chosen is Wireguard.
 func (w Wireguard) validate(vpnProvider string) (err error) {
 	if !helpers.IsOneOf(vpnProvider,
-		constants.Custom,
-		constants.Ivpn,
-		constants.Mullvad,
-		constants.Windscribe,
+		providers.Custom,
+		providers.Ivpn,
+		providers.Mullvad,
+		providers.Windscribe,
 	) {
 		// do not validate for VPN provider not supporting Wireguard
 		return nil

internal/configuration/settings/wireguardselection.go

@@ -5,7 +5,7 @@ import (
 	"net"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings/helpers"
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gotree"
 	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
 )
@@ -36,8 +36,8 @@ type WireguardSelection struct {
 func (w WireguardSelection) validate(vpnProvider string) (err error) {
 	// Validate EndpointIP
 	switch vpnProvider {
-	case constants.Ivpn, constants.Mullvad, constants.Windscribe: // endpoint IP addresses are baked in
-	case constants.Custom:
+	case providers.Ivpn, providers.Mullvad, providers.Windscribe: // endpoint IP addresses are baked in
+	case providers.Custom:
 		if len(w.EndpointIP) == 0 {
 			return ErrWireguardEndpointIPNotSet
 		}
@@ -47,23 +47,23 @@ func (w WireguardSelection) validate(vpnProvider string) (err error) {
 	// Validate EndpointPort
 	switch vpnProvider {
 	// EndpointPort is required
-	case constants.Custom:
+	case providers.Custom:
 		if *w.EndpointPort == 0 {
 			return ErrWireguardEndpointPortNotSet
 		}
-	case constants.Ivpn, constants.Mullvad, constants.Windscribe:
+	case providers.Ivpn, providers.Mullvad, providers.Windscribe:
 		// EndpointPort is optional and can be 0
 		if *w.EndpointPort == 0 {
 			break // no custom endpoint port set
 		}
-		if vpnProvider == constants.Mullvad {
+		if vpnProvider == providers.Mullvad {
 			break // no restriction on custom endpoint port value
 		}
 		var allowed []uint16
 		switch vpnProvider {
-		case constants.Ivpn:
+		case providers.Ivpn:
 			allowed = []uint16{2049, 2050, 53, 30587, 41893, 48574, 58237}
-		case constants.Windscribe:
+		case providers.Windscribe:
 			allowed = []uint16{53, 80, 123, 443, 1194, 65142}
 		}
 
@@ -78,8 +78,8 @@ func (w WireguardSelection) validate(vpnProvider string) (err error) {
 
 	// Validate PublicKey
 	switch vpnProvider {
-	case constants.Ivpn, constants.Mullvad, constants.Windscribe: // public keys are baked in
-	case constants.Custom:
+	case providers.Ivpn, providers.Mullvad, providers.Windscribe: // public keys are baked in
+	case providers.Custom:
 		if w.PublicKey == "" {
 			return ErrWireguardPublicKeyNotSet
 		}

internal/configuration/sources/env/provider.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 )
 
 func (r *Reader) readProvider(vpnType string) (provider settings.Provider, err error) {
@@ -35,11 +36,11 @@ func (r *Reader) readVPNServiceProvider(vpnType string) (vpnProviderPtr *string)
 	switch {
 	case vpnType != constants.Wireguard &&
 		os.Getenv("OPENVPN_CUSTOM_CONFIG") != "": // retro compatibility
-		return stringPtr(constants.Custom)
+		return stringPtr(providers.Custom)
 	case s == "":
 		return nil
 	case s == "pia": // retro compatibility
-		return stringPtr(constants.PrivateInternetAccess)
+		return stringPtr(providers.PrivateInternetAccess)
 	}
 	return stringPtr(s)
 }

internal/configuration/sources/env/serverselection.go

@@ -9,7 +9,7 @@ import (
 	"strings"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 )
 
 var (
@@ -27,7 +27,7 @@ func (r *Reader) readServerSelection(vpnProvider, vpnType string) (
 
 	countriesKey, _ := r.getEnvWithRetro("SERVER_COUNTRIES", "COUNTRY")
 	ss.Countries = envToCSV(countriesKey)
-	if vpnProvider == constants.Cyberghost && len(ss.Countries) == 0 {
+	if vpnProvider == providers.Cyberghost && len(ss.Countries) == 0 {
 		// Retro-compatibility for Cyberghost using the REGION variable
 		ss.Countries = envToCSV("REGION")
 		if len(ss.Countries) > 0 {

internal/constants/providers.go

@@ -1,27 +0,0 @@
-package constants
-
-func AllProviders() []string {
-	return []string{
-		Custom,
-		Cyberghost,
-		Expressvpn,
-		Fastestvpn,
-		HideMyAss,
-		Ipvanish,
-		Ivpn,
-		Mullvad,
-		Nordvpn,
-		Perfectprivacy,
-		Privado,
-		PrivateInternetAccess,
-		Privatevpn,
-		Protonvpn,
-		Purevpn,
-		Surfshark,
-		Torguard,
-		VPNUnlimited,
-		Vyprvpn,
-		Wevpn,
-		Windscribe,
-	}
-}

internal/constants/providers/providers.go

@@ -0,0 +1,53 @@
+package providers
+
+const (
+	// Custom is the VPN provider name for custom
+	// VPN configurations.
+	Custom                = "custom"
+	Cyberghost            = "cyberghost"
+	Expressvpn            = "expressvpn"
+	Fastestvpn            = "fastestvpn"
+	HideMyAss             = "hidemyass"
+	Ipvanish              = "ipvanish"
+	Ivpn                  = "ivpn"
+	Mullvad               = "mullvad"
+	Nordvpn               = "nordvpn"
+	Perfectprivacy        = "perfect privacy"
+	Privado               = "privado"
+	PrivateInternetAccess = "private internet access"
+	Privatevpn            = "privatevpn"
+	Protonvpn             = "protonvpn"
+	Purevpn               = "purevpn"
+	Surfshark             = "surfshark"
+	Torguard              = "torguard"
+	VPNUnlimited          = "vpn unlimited"
+	Vyprvpn               = "vyprvpn"
+	Wevpn                 = "wevpn"
+	Windscribe            = "windscribe"
+)
+
+func All() []string {
+	return []string{
+		Custom,
+		Cyberghost,
+		Expressvpn,
+		Fastestvpn,
+		HideMyAss,
+		Ipvanish,
+		Ivpn,
+		Mullvad,
+		Nordvpn,
+		Perfectprivacy,
+		Privado,
+		PrivateInternetAccess,
+		Privatevpn,
+		Protonvpn,
+		Purevpn,
+		Surfshark,
+		Torguard,
+		VPNUnlimited,
+		Vyprvpn,
+		Wevpn,
+		Windscribe,
+	}
+}

internal/constants/vpn.go

@@ -5,52 +5,6 @@ const (
 	Wireguard = "wireguard"
 )
 
-const (
-	// Custom is the VPN provider name for custom
-	// VPN configurations.
-	Custom = "custom"
-	// Cyberghost is a VPN provider.
-	Cyberghost = "cyberghost"
-	// Expressvpn is a VPN provider.
-	Expressvpn = "expressvpn"
-	// Fastestvpn is a VPN provider.
-	Fastestvpn = "fastestvpn"
-	// HideMyAss is a VPN provider.
-	HideMyAss = "hidemyass"
-	// Ipvanish is a VPN provider.
-	Ipvanish = "ipvanish"
-	// Ivpn is a VPN provider.
-	Ivpn = "ivpn"
-	// Mullvad is a VPN provider.
-	Mullvad = "mullvad"
-	// Nordvpn is a VPN provider.
-	Nordvpn = "nordvpn"
-	// Perfectprivacy is a VPN provider.
-	Perfectprivacy = "perfect privacy"
-	// Privado is a VPN provider.
-	Privado = "privado"
-	// PrivateInternetAccess is a VPN provider.
-	PrivateInternetAccess = "private internet access"
-	// Privatevpn is a VPN provider.
-	Privatevpn = "privatevpn"
-	// Protonvpn is a VPN provider.
-	Protonvpn = "protonvpn"
-	// Purevpn is a VPN provider.
-	Purevpn = "purevpn"
-	// Surfshark is a VPN provider.
-	Surfshark = "surfshark"
-	// Torguard is a VPN provider.
-	Torguard = "torguard"
-	// VPNUnlimited is a VPN provider.
-	VPNUnlimited = "vpn unlimited"
-	// Vyprvpn is a VPN provider.
-	Vyprvpn = "vyprvpn"
-	// WeVPN is a VPN provider.
-	Wevpn = "wevpn"
-	// Windscribe is a VPN provider.
-	Windscribe = "windscribe"
-)
-
 const (
 	// TCP is a network protocol (reliable and slower than UDP).
 	TCP string = "tcp"

internal/provider/custom/openvpnconf_test.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/stretchr/testify/assert"
 )
@@ -42,7 +43,7 @@ func Test_modifyConfig(t *testing.T) {
 				ProcessUser: "procuser",
 				Interface:   "tun3",
 				Verbosity:   intPtr(0),
-			}.WithDefaults(constants.Custom),
+			}.WithDefaults(providers.Custom),
 			connection: models.Connection{
 				IP:       net.IPv4(1, 2, 3, 4),
 				Port:     1194,

internal/provider/custom/provider.go

@@ -1,7 +1,7 @@
 package custom
 
 import (
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/openvpn/extract"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -14,6 +14,6 @@ type Provider struct {
 func New() *Provider {
 	return &Provider{
 		extractor:       extract.New(),
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Custom),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Custom),
 	}
 }

internal/provider/cyberghost/filter_test.go

@@ -5,7 +5,7 @@ import (
 	"testing"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -22,7 +22,7 @@ func Test_Cyberghost_filterServers(t *testing.T) {
 		err             error
 	}{
 		"no server": {
-			selection: settings.ServerSelection{}.WithDefaults(constants.Cyberghost),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Cyberghost),
 			err:       errors.New("no server found: for VPN openvpn; protocol udp"),
 		},
 		"servers without filter defaults to UDP": {
@@ -32,7 +32,7 @@ func Test_Cyberghost_filterServers(t *testing.T) {
 				{Country: "c", UDP: true},
 				{Country: "d", UDP: true},
 			},
-			selection: settings.ServerSelection{}.WithDefaults(constants.Cyberghost),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Cyberghost),
 			filteredServers: []models.CyberghostServer{
 				{Country: "c", UDP: true},
 				{Country: "d", UDP: true},
@@ -49,7 +49,7 @@ func Test_Cyberghost_filterServers(t *testing.T) {
 				OpenVPN: settings.OpenVPNSelection{
 					TCP: boolPtr(true),
 				},
-			}.WithDefaults(constants.Cyberghost),
+			}.WithDefaults(providers.Cyberghost),
 			filteredServers: []models.CyberghostServer{
 				{Country: "a", TCP: true},
 				{Country: "b", TCP: true},
@@ -64,7 +64,7 @@ func Test_Cyberghost_filterServers(t *testing.T) {
 			},
 			selection: settings.ServerSelection{
 				Countries: []string{"a", "c"},
-			}.WithDefaults(constants.Cyberghost),
+			}.WithDefaults(providers.Cyberghost),
 			filteredServers: []models.CyberghostServer{
 				{Country: "a", UDP: true},
 				{Country: "c", UDP: true},
@@ -78,7 +78,7 @@ func Test_Cyberghost_filterServers(t *testing.T) {
 			},
 			selection: settings.ServerSelection{
 				Hostnames: []string{"a", "c"},
-			}.WithDefaults(constants.Cyberghost),
+			}.WithDefaults(providers.Cyberghost),
 			filteredServers: []models.CyberghostServer{
 				{Hostname: "a", UDP: true},
 				{Hostname: "c", UDP: true},

internal/provider/cyberghost/provider.go

@@ -3,7 +3,7 @@ package cyberghost
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.CyberghostServer, randSource rand.Source) *Cyberghost
 	return &Cyberghost{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Cyberghost),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Cyberghost),
 	}
 }

internal/provider/expressvpn/connection_test.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -23,7 +24,7 @@ func Test_Provider_GetConnection(t *testing.T) {
 		err        error
 	}{
 		"no server available": {
-			selection: settings.ServerSelection{}.WithDefaults(constants.Expressvpn),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Expressvpn),
 			err:       errors.New("no server found: for VPN openvpn; protocol udp"),
 		},
 		"no filter": {
@@ -32,7 +33,7 @@ func Test_Provider_GetConnection(t *testing.T) {
 				{IPs: []net.IP{net.IPv4(2, 2, 2, 2)}, UDP: true},
 				{IPs: []net.IP{net.IPv4(3, 3, 3, 3)}, UDP: true},
 			},
-			selection: settings.ServerSelection{}.WithDefaults(constants.Expressvpn),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Expressvpn),
 			connection: models.Connection{
 				Type:     constants.OpenVPN,
 				IP:       net.IPv4(1, 1, 1, 1),
@@ -43,7 +44,7 @@ func Test_Provider_GetConnection(t *testing.T) {
 		"target IP": {
 			selection: settings.ServerSelection{
 				TargetIP: net.IPv4(2, 2, 2, 2),
-			}.WithDefaults(constants.Expressvpn),
+			}.WithDefaults(providers.Expressvpn),
 			servers: []models.ExpressvpnServer{
 				{IPs: []net.IP{net.IPv4(1, 1, 1, 1)}, UDP: true},
 				{IPs: []net.IP{net.IPv4(2, 2, 2, 2)}, UDP: true},
@@ -59,7 +60,7 @@ func Test_Provider_GetConnection(t *testing.T) {
 		"with filter": {
 			selection: settings.ServerSelection{
 				Hostnames: []string{"b"},
-			}.WithDefaults(constants.Expressvpn),
+			}.WithDefaults(providers.Expressvpn),
 			servers: []models.ExpressvpnServer{
 				{Hostname: "a", IPs: []net.IP{net.IPv4(1, 1, 1, 1)}, UDP: true},
 				{Hostname: "b", IPs: []net.IP{net.IPv4(2, 2, 2, 2)}, UDP: true},

internal/provider/expressvpn/filter_test.go

@@ -6,7 +6,7 @@ import (
 	"testing"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -24,7 +24,7 @@ func Test_Expressvpn_filterServers(t *testing.T) {
 		err       error
 	}{
 		"no server available": {
-			selection: settings.ServerSelection{}.WithDefaults(constants.Expressvpn),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Expressvpn),
 			err:       errors.New("no server found: for VPN openvpn; protocol udp"),
 		},
 		"no filter": {
@@ -33,7 +33,7 @@ func Test_Expressvpn_filterServers(t *testing.T) {
 				{Hostname: "b", UDP: true},
 				{Hostname: "c", UDP: true},
 			},
-			selection: settings.ServerSelection{}.WithDefaults(constants.Expressvpn),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Expressvpn),
 			filtered: []models.ExpressvpnServer{
 				{Hostname: "a", UDP: true},
 				{Hostname: "b", UDP: true},
@@ -43,7 +43,7 @@ func Test_Expressvpn_filterServers(t *testing.T) {
 		"filter by country": {
 			selection: settings.ServerSelection{
 				Countries: []string{"b"},
-			}.WithDefaults(constants.Expressvpn),
+			}.WithDefaults(providers.Expressvpn),
 			servers: []models.ExpressvpnServer{
 				{Country: "a", UDP: true},
 				{Country: "b", UDP: true},
@@ -56,7 +56,7 @@ func Test_Expressvpn_filterServers(t *testing.T) {
 		"filter by city": {
 			selection: settings.ServerSelection{
 				Cities: []string{"b"},
-			}.WithDefaults(constants.Expressvpn),
+			}.WithDefaults(providers.Expressvpn),
 			servers: []models.ExpressvpnServer{
 				{City: "a", UDP: true},
 				{City: "b", UDP: true},
@@ -69,7 +69,7 @@ func Test_Expressvpn_filterServers(t *testing.T) {
 		"filter by hostname": {
 			selection: settings.ServerSelection{
 				Hostnames: []string{"b"},
-			}.WithDefaults(constants.Expressvpn),
+			}.WithDefaults(providers.Expressvpn),
 			servers: []models.ExpressvpnServer{
 				{Hostname: "a", UDP: true},
 				{Hostname: "b", UDP: true},
@@ -84,7 +84,7 @@ func Test_Expressvpn_filterServers(t *testing.T) {
 				OpenVPN: settings.OpenVPNSelection{
 					TCP: boolPtr(true),
 				},
-			}.WithDefaults(constants.Expressvpn),
+			}.WithDefaults(providers.Expressvpn),
 			servers: []models.ExpressvpnServer{
 				{Hostname: "a", UDP: true},
 				{Hostname: "b", UDP: true, TCP: true},

internal/provider/expressvpn/provider.go

@@ -3,7 +3,7 @@ package expressvpn
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.ExpressvpnServer, randSource rand.Source) *Provider {
 	return &Provider{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Expressvpn),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Expressvpn),
 	}
 }

internal/provider/fastestvpn/provider.go

@@ -3,7 +3,7 @@ package fastestvpn
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.FastestvpnServer, randSource rand.Source) *Fastestvpn
 	return &Fastestvpn{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Fastestvpn),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Fastestvpn),
 	}
 }

internal/provider/hidemyass/provider.go

@@ -3,7 +3,7 @@ package hidemyass
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.HideMyAssServer, randSource rand.Source) *HideMyAss {
 	return &HideMyAss{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.HideMyAss),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.HideMyAss),
 	}
 }

internal/provider/ipvanish/provider.go

@@ -3,7 +3,7 @@ package ipvanish
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.IpvanishServer, randSource rand.Source) *Ipvanish {
 	return &Ipvanish{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Ipvanish),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Ipvanish),
 	}
 }

internal/provider/ivpn/connection_test.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -23,7 +24,7 @@ func Test_Ivpn_GetConnection(t *testing.T) {
 		err        error
 	}{
 		"no server available": {
-			selection: settings.ServerSelection{}.WithDefaults(constants.Ivpn),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Ivpn),
 			err:       errors.New("no server found: for VPN openvpn; protocol udp"),
 		},
 		"no filter": {
@@ -32,7 +33,7 @@ func Test_Ivpn_GetConnection(t *testing.T) {
 				{VPN: constants.OpenVPN, IPs: []net.IP{net.IPv4(2, 2, 2, 2)}, UDP: true},
 				{VPN: constants.OpenVPN, IPs: []net.IP{net.IPv4(3, 3, 3, 3)}, UDP: true},
 			},
-			selection: settings.ServerSelection{}.WithDefaults(constants.Ivpn),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Ivpn),
 			connection: models.Connection{
 				Type:     constants.OpenVPN,
 				IP:       net.IPv4(1, 1, 1, 1),
@@ -43,7 +44,7 @@ func Test_Ivpn_GetConnection(t *testing.T) {
 		"target IP": {
 			selection: settings.ServerSelection{
 				TargetIP: net.IPv4(2, 2, 2, 2),
-			}.WithDefaults(constants.Ivpn),
+			}.WithDefaults(providers.Ivpn),
 			servers: []models.IvpnServer{
 				{VPN: constants.OpenVPN, IPs: []net.IP{net.IPv4(1, 1, 1, 1)}, UDP: true},
 				{VPN: constants.OpenVPN, IPs: []net.IP{net.IPv4(2, 2, 2, 2)}, UDP: true},
@@ -59,7 +60,7 @@ func Test_Ivpn_GetConnection(t *testing.T) {
 		"with filter": {
 			selection: settings.ServerSelection{
 				Hostnames: []string{"b"},
-			}.WithDefaults(constants.Ivpn),
+			}.WithDefaults(providers.Ivpn),
 			servers: []models.IvpnServer{
 				{VPN: constants.OpenVPN, Hostname: "a", IPs: []net.IP{net.IPv4(1, 1, 1, 1)}, UDP: true},
 				{VPN: constants.OpenVPN, Hostname: "b", IPs: []net.IP{net.IPv4(2, 2, 2, 2)}, UDP: true},

internal/provider/ivpn/filter_test.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -24,7 +25,7 @@ func Test_Ivpn_filterServers(t *testing.T) {
 		err       error
 	}{
 		"no server available": {
-			selection: settings.ServerSelection{}.WithDefaults(constants.Ivpn),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Ivpn),
 			err:       errors.New("no server found: for VPN openvpn; protocol udp"),
 		},
 		"no filter": {
@@ -33,7 +34,7 @@ func Test_Ivpn_filterServers(t *testing.T) {
 				{VPN: constants.OpenVPN, Hostname: "b", UDP: true},
 				{VPN: constants.OpenVPN, Hostname: "c", UDP: true},
 			},
-			selection: settings.ServerSelection{}.WithDefaults(constants.Ivpn),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Ivpn),
 			filtered: []models.IvpnServer{
 				{VPN: constants.OpenVPN, Hostname: "a", UDP: true},
 				{VPN: constants.OpenVPN, Hostname: "b", UDP: true},
@@ -43,7 +44,7 @@ func Test_Ivpn_filterServers(t *testing.T) {
 		"filter by country": {
 			selection: settings.ServerSelection{
 				Countries: []string{"b"},
-			}.WithDefaults(constants.Ivpn),
+			}.WithDefaults(providers.Ivpn),
 			servers: []models.IvpnServer{
 				{VPN: constants.OpenVPN, Country: "a", UDP: true},
 				{VPN: constants.OpenVPN, Country: "b", UDP: true},
@@ -56,7 +57,7 @@ func Test_Ivpn_filterServers(t *testing.T) {
 		"filter by city": {
 			selection: settings.ServerSelection{
 				Cities: []string{"b"},
-			}.WithDefaults(constants.Ivpn),
+			}.WithDefaults(providers.Ivpn),
 			servers: []models.IvpnServer{
 				{VPN: constants.OpenVPN, City: "a", UDP: true},
 				{VPN: constants.OpenVPN, City: "b", UDP: true},
@@ -69,7 +70,7 @@ func Test_Ivpn_filterServers(t *testing.T) {
 		"filter by ISP": {
 			selection: settings.ServerSelection{
 				ISPs: []string{"b"},
-			}.WithDefaults(constants.Ivpn),
+			}.WithDefaults(providers.Ivpn),
 			servers: []models.IvpnServer{
 				{VPN: constants.OpenVPN, ISP: "a", UDP: true},
 				{VPN: constants.OpenVPN, ISP: "b", UDP: true},
@@ -82,7 +83,7 @@ func Test_Ivpn_filterServers(t *testing.T) {
 		"filter by hostname": {
 			selection: settings.ServerSelection{
 				Hostnames: []string{"b"},
-			}.WithDefaults(constants.Ivpn),
+			}.WithDefaults(providers.Ivpn),
 			servers: []models.IvpnServer{
 				{VPN: constants.OpenVPN, Hostname: "a", UDP: true},
 				{VPN: constants.OpenVPN, Hostname: "b", UDP: true},
@@ -97,7 +98,7 @@ func Test_Ivpn_filterServers(t *testing.T) {
 				OpenVPN: settings.OpenVPNSelection{
 					TCP: boolPtr(true),
 				},
-			}.WithDefaults(constants.Ivpn),
+			}.WithDefaults(providers.Ivpn),
 			servers: []models.IvpnServer{
 				{VPN: constants.OpenVPN, Hostname: "a", UDP: true},
 				{VPN: constants.OpenVPN, Hostname: "b", UDP: true, TCP: true},

internal/provider/ivpn/provider.go

@@ -3,7 +3,7 @@ package ivpn
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.IvpnServer, randSource rand.Source) *Ivpn {
 	return &Ivpn{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Ivpn),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Ivpn),
 	}
 }

internal/provider/mullvad/connection_test.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -23,7 +24,7 @@ func Test_Mullvad_GetConnection(t *testing.T) {
 		err        error
 	}{
 		"no server available": {
-			selection: settings.ServerSelection{}.WithDefaults(constants.Mullvad),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Mullvad),
 			err:       errors.New("no server found: for VPN openvpn; protocol udp"),
 		},
 		"no filter": {
@@ -32,7 +33,7 @@ func Test_Mullvad_GetConnection(t *testing.T) {
 				{VPN: constants.OpenVPN, IPs: []net.IP{net.IPv4(2, 2, 2, 2)}},
 				{VPN: constants.OpenVPN, IPs: []net.IP{net.IPv4(3, 3, 3, 3)}},
 			},
-			selection: settings.ServerSelection{}.WithDefaults(constants.Mullvad),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Mullvad),
 			connection: models.Connection{
 				Type:     constants.OpenVPN,
 				IP:       net.IPv4(1, 1, 1, 1),
@@ -43,7 +44,7 @@ func Test_Mullvad_GetConnection(t *testing.T) {
 		"target IP": {
 			selection: settings.ServerSelection{
 				TargetIP: net.IPv4(2, 2, 2, 2),
-			}.WithDefaults(constants.Mullvad),
+			}.WithDefaults(providers.Mullvad),
 			servers: []models.MullvadServer{
 				{VPN: constants.OpenVPN, IPs: []net.IP{net.IPv4(1, 1, 1, 1)}},
 				{VPN: constants.OpenVPN, IPs: []net.IP{net.IPv4(2, 2, 2, 2)}},
@@ -59,7 +60,7 @@ func Test_Mullvad_GetConnection(t *testing.T) {
 		"with filter": {
 			selection: settings.ServerSelection{
 				Hostnames: []string{"b"},
-			}.WithDefaults(constants.Mullvad),
+			}.WithDefaults(providers.Mullvad),
 			servers: []models.MullvadServer{
 				{VPN: constants.OpenVPN, Hostname: "a", IPs: []net.IP{net.IPv4(1, 1, 1, 1)}},
 				{VPN: constants.OpenVPN, Hostname: "b", IPs: []net.IP{net.IPv4(2, 2, 2, 2)}},

internal/provider/mullvad/filter_test.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -24,7 +25,7 @@ func Test_Mullvad_filterServers(t *testing.T) {
 		err       error
 	}{
 		"no server available": {
-			selection: settings.ServerSelection{}.WithDefaults(constants.Mullvad),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Mullvad),
 			err:       errors.New("no server found: for VPN openvpn; protocol udp"),
 		},
 		"no filter": {
@@ -33,7 +34,7 @@ func Test_Mullvad_filterServers(t *testing.T) {
 				{VPN: constants.OpenVPN, Hostname: "b"},
 				{VPN: constants.OpenVPN, Hostname: "c"},
 			},
-			selection: settings.ServerSelection{}.WithDefaults(constants.Mullvad),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Mullvad),
 			filtered: []models.MullvadServer{
 				{VPN: constants.OpenVPN, Hostname: "a"},
 				{VPN: constants.OpenVPN, Hostname: "b"},
@@ -43,7 +44,7 @@ func Test_Mullvad_filterServers(t *testing.T) {
 		"filter OpenVPN out": {
 			selection: settings.ServerSelection{
 				VPN: constants.Wireguard,
-			}.WithDefaults(constants.Mullvad),
+			}.WithDefaults(providers.Mullvad),
 			servers: []models.MullvadServer{
 				{VPN: constants.OpenVPN, Hostname: "a"},
 				{VPN: constants.Wireguard, Hostname: "b"},
@@ -56,7 +57,7 @@ func Test_Mullvad_filterServers(t *testing.T) {
 		"filter by country": {
 			selection: settings.ServerSelection{
 				Countries: []string{"b"},
-			}.WithDefaults(constants.Mullvad),
+			}.WithDefaults(providers.Mullvad),
 			servers: []models.MullvadServer{
 				{VPN: constants.OpenVPN, Country: "a"},
 				{VPN: constants.OpenVPN, Country: "b"},
@@ -69,7 +70,7 @@ func Test_Mullvad_filterServers(t *testing.T) {
 		"filter by city": {
 			selection: settings.ServerSelection{
 				Cities: []string{"b"},
-			}.WithDefaults(constants.Mullvad),
+			}.WithDefaults(providers.Mullvad),
 			servers: []models.MullvadServer{
 				{VPN: constants.OpenVPN, City: "a"},
 				{VPN: constants.OpenVPN, City: "b"},
@@ -82,7 +83,7 @@ func Test_Mullvad_filterServers(t *testing.T) {
 		"filter by ISP": {
 			selection: settings.ServerSelection{
 				ISPs: []string{"b"},
-			}.WithDefaults(constants.Mullvad),
+			}.WithDefaults(providers.Mullvad),
 			servers: []models.MullvadServer{
 				{VPN: constants.OpenVPN, ISP: "a"},
 				{VPN: constants.OpenVPN, ISP: "b"},
@@ -95,7 +96,7 @@ func Test_Mullvad_filterServers(t *testing.T) {
 		"filter by hostname": {
 			selection: settings.ServerSelection{
 				Hostnames: []string{"b"},
-			}.WithDefaults(constants.Mullvad),
+			}.WithDefaults(providers.Mullvad),
 			servers: []models.MullvadServer{
 				{VPN: constants.OpenVPN, Hostname: "a"},
 				{VPN: constants.OpenVPN, Hostname: "b"},
@@ -108,7 +109,7 @@ func Test_Mullvad_filterServers(t *testing.T) {
 		"filter by owned": {
 			selection: settings.ServerSelection{
 				OwnedOnly: boolPtr(true),
-			}.WithDefaults(constants.Mullvad),
+			}.WithDefaults(providers.Mullvad),
 			servers: []models.MullvadServer{
 				{VPN: constants.OpenVPN, Hostname: "a"},
 				{VPN: constants.OpenVPN, Hostname: "b", Owned: true},

internal/provider/mullvad/provider.go

@@ -3,7 +3,7 @@ package mullvad
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.MullvadServer, randSource rand.Source) *Mullvad {
 	return &Mullvad{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Mullvad),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Mullvad),
 	}
 }

internal/provider/nordvpn/provider.go

@@ -3,7 +3,7 @@ package nordvpn
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.NordvpnServer, randSource rand.Source) *Nordvpn {
 	return &Nordvpn{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Nordvpn),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Nordvpn),
 	}
 }

internal/provider/perfectprivacy/provider.go

@@ -3,7 +3,7 @@ package perfectprivacy
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.PerfectprivacyServer, randSource rand.Source) *Perfect
 	return &Perfectprivacy{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Perfectprivacy),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Perfectprivacy),
 	}
 }

internal/provider/privado/provider.go

@@ -3,7 +3,7 @@ package privado
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.PrivadoServer, randSource rand.Source) *Privado {
 	return &Privado{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Privado),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Privado),
 	}
 }

internal/provider/privatevpn/provider.go

@@ -3,7 +3,7 @@ package privatevpn
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.PrivatevpnServer, randSource rand.Source) *Privatevpn
 	return &Privatevpn{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Privatevpn),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Privatevpn),
 	}
 }

internal/provider/protonvpn/provider.go

@@ -3,7 +3,7 @@ package protonvpn
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.ProtonvpnServer, randSource rand.Source) *Protonvpn {
 	return &Protonvpn{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Protonvpn),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Protonvpn),
 	}
 }

internal/provider/provider.go

@@ -9,7 +9,7 @@ import (
 	"time"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/custom"
 	"github.com/qdm12/gluetun/internal/provider/cyberghost"
@@ -53,47 +53,47 @@ type PortForwarder interface {
 func New(provider string, allServers models.AllServers, timeNow func() time.Time) Provider {
 	randSource := rand.NewSource(timeNow().UnixNano())
 	switch provider {
-	case constants.Custom:
+	case providers.Custom:
 		return custom.New()
-	case constants.Cyberghost:
+	case providers.Cyberghost:
 		return cyberghost.New(allServers.Cyberghost.Servers, randSource)
-	case constants.Expressvpn:
+	case providers.Expressvpn:
 		return expressvpn.New(allServers.Expressvpn.Servers, randSource)
-	case constants.Fastestvpn:
+	case providers.Fastestvpn:
 		return fastestvpn.New(allServers.Fastestvpn.Servers, randSource)
-	case constants.HideMyAss:
+	case providers.HideMyAss:
 		return hidemyass.New(allServers.HideMyAss.Servers, randSource)
-	case constants.Ipvanish:
+	case providers.Ipvanish:
 		return ipvanish.New(allServers.Ipvanish.Servers, randSource)
-	case constants.Ivpn:
+	case providers.Ivpn:
 		return ivpn.New(allServers.Ivpn.Servers, randSource)
-	case constants.Mullvad:
+	case providers.Mullvad:
 		return mullvad.New(allServers.Mullvad.Servers, randSource)
-	case constants.Nordvpn:
+	case providers.Nordvpn:
 		return nordvpn.New(allServers.Nordvpn.Servers, randSource)
-	case constants.Perfectprivacy:
+	case providers.Perfectprivacy:
 		return perfectprivacy.New(allServers.Perfectprivacy.Servers, randSource)
-	case constants.Privado:
+	case providers.Privado:
 		return privado.New(allServers.Privado.Servers, randSource)
-	case constants.PrivateInternetAccess:
+	case providers.PrivateInternetAccess:
 		return privateinternetaccess.New(allServers.Pia.Servers, randSource, timeNow)
-	case constants.Privatevpn:
+	case providers.Privatevpn:
 		return privatevpn.New(allServers.Privatevpn.Servers, randSource)
-	case constants.Protonvpn:
+	case providers.Protonvpn:
 		return protonvpn.New(allServers.Protonvpn.Servers, randSource)
-	case constants.Purevpn:
+	case providers.Purevpn:
 		return purevpn.New(allServers.Purevpn.Servers, randSource)
-	case constants.Surfshark:
+	case providers.Surfshark:
 		return surfshark.New(allServers.Surfshark.Servers, randSource)
-	case constants.Torguard:
+	case providers.Torguard:
 		return torguard.New(allServers.Torguard.Servers, randSource)
-	case constants.VPNUnlimited:
+	case providers.VPNUnlimited:
 		return vpnunlimited.New(allServers.VPNUnlimited.Servers, randSource)
-	case constants.Vyprvpn:
+	case providers.Vyprvpn:
 		return vyprvpn.New(allServers.Vyprvpn.Servers, randSource)
-	case constants.Wevpn:
+	case providers.Wevpn:
 		return wevpn.New(allServers.Wevpn.Servers, randSource)
-	case constants.Windscribe:
+	case providers.Windscribe:
 		return windscribe.New(allServers.Windscribe.Servers, randSource)
 	default:
 		panic("provider " + provider + " is unknown") // should never occur

internal/provider/purevpn/provider.go

@@ -3,7 +3,7 @@ package purevpn
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.PurevpnServer, randSource rand.Source) *Purevpn {
 	return &Purevpn{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Purevpn),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Purevpn),
 	}
 }

internal/provider/surfshark/filter_test.go

@@ -6,7 +6,7 @@ import (
 	"testing"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -24,7 +24,7 @@ func Test_Surfshark_filterServers(t *testing.T) {
 		err       error
 	}{
 		"no server available": {
-			selection: settings.ServerSelection{}.WithDefaults(constants.Surfshark),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Surfshark),
 			err:       errors.New("no server found: for VPN openvpn; protocol udp"),
 		},
 		"no filter": {
@@ -33,7 +33,7 @@ func Test_Surfshark_filterServers(t *testing.T) {
 				{Hostname: "b", UDP: true},
 				{Hostname: "c", UDP: true},
 			},
-			selection: settings.ServerSelection{}.WithDefaults(constants.Surfshark),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Surfshark),
 			filtered: []models.SurfsharkServer{
 				{Hostname: "a", UDP: true},
 				{Hostname: "b", UDP: true},
@@ -43,7 +43,7 @@ func Test_Surfshark_filterServers(t *testing.T) {
 		"filter by region": {
 			selection: settings.ServerSelection{
 				Regions: []string{"b"},
-			}.WithDefaults(constants.Surfshark),
+			}.WithDefaults(providers.Surfshark),
 			servers: []models.SurfsharkServer{
 				{Region: "a", UDP: true},
 				{Region: "b", UDP: true},
@@ -56,7 +56,7 @@ func Test_Surfshark_filterServers(t *testing.T) {
 		"filter by country": {
 			selection: settings.ServerSelection{
 				Countries: []string{"b"},
-			}.WithDefaults(constants.Surfshark),
+			}.WithDefaults(providers.Surfshark),
 			servers: []models.SurfsharkServer{
 				{Country: "a", UDP: true},
 				{Country: "b", UDP: true},
@@ -69,7 +69,7 @@ func Test_Surfshark_filterServers(t *testing.T) {
 		"filter by city": {
 			selection: settings.ServerSelection{
 				Cities: []string{"b"},
-			}.WithDefaults(constants.Surfshark),
+			}.WithDefaults(providers.Surfshark),
 			servers: []models.SurfsharkServer{
 				{City: "a", UDP: true},
 				{City: "b", UDP: true},
@@ -82,7 +82,7 @@ func Test_Surfshark_filterServers(t *testing.T) {
 		"filter by hostname": {
 			selection: settings.ServerSelection{
 				Hostnames: []string{"b"},
-			}.WithDefaults(constants.Surfshark),
+			}.WithDefaults(providers.Surfshark),
 			servers: []models.SurfsharkServer{
 				{Hostname: "a", UDP: true},
 				{Hostname: "b", UDP: true},
@@ -97,7 +97,7 @@ func Test_Surfshark_filterServers(t *testing.T) {
 				OpenVPN: settings.OpenVPNSelection{
 					TCP: boolPtr(true),
 				},
-			}.WithDefaults(constants.Surfshark),
+			}.WithDefaults(providers.Surfshark),
 			servers: []models.SurfsharkServer{
 				{Hostname: "a", UDP: true},
 				{Hostname: "b", UDP: true, TCP: true},
@@ -110,7 +110,7 @@ func Test_Surfshark_filterServers(t *testing.T) {
 		"filter by multihop only": {
 			selection: settings.ServerSelection{
 				MultiHopOnly: boolPtr(true),
-			}.WithDefaults(constants.Surfshark),
+			}.WithDefaults(providers.Surfshark),
 			servers: []models.SurfsharkServer{
 				{Hostname: "a", UDP: true},
 				{Hostname: "b", MultiHop: true, UDP: true},

internal/provider/surfshark/provider.go

@@ -3,7 +3,7 @@ package surfshark
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.SurfsharkServer, randSource rand.Source) *Surfshark {
 	return &Surfshark{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Surfshark),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Surfshark),
 	}
 }

internal/provider/torguard/provider.go

@@ -3,7 +3,7 @@ package torguard
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.TorguardServer, randSource rand.Source) *Torguard {
 	return &Torguard{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Torguard),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Torguard),
 	}
 }

internal/provider/vpnunlimited/provider.go

@@ -3,7 +3,7 @@ package vpnunlimited
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.VPNUnlimitedServer, randSource rand.Source) *Provider
 	return &Provider{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.VPNUnlimited),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.VPNUnlimited),
 	}
 }

internal/provider/vyprvpn/provider.go

@@ -3,7 +3,7 @@ package vyprvpn
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.VyprvpnServer, randSource rand.Source) *Vyprvpn {
 	return &Vyprvpn{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Vyprvpn),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Vyprvpn),
 	}
 }

internal/provider/wevpn/connection_test.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -25,7 +26,7 @@ func Test_Wevpn_GetConnection(t *testing.T) {
 		"no server available": {
 			selection: settings.ServerSelection{
 				VPN: constants.OpenVPN,
-			}.WithDefaults(constants.Wevpn),
+			}.WithDefaults(providers.Wevpn),
 			err: errors.New("no server found: for VPN openvpn; protocol udp"),
 		},
 		"no filter": {
@@ -34,7 +35,7 @@ func Test_Wevpn_GetConnection(t *testing.T) {
 				{UDP: true, IPs: []net.IP{net.IPv4(2, 2, 2, 2)}},
 				{UDP: true, IPs: []net.IP{net.IPv4(3, 3, 3, 3)}},
 			},
-			selection: settings.ServerSelection{}.WithDefaults(constants.Wevpn),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Wevpn),
 			connection: models.Connection{
 				Type:     constants.OpenVPN,
 				IP:       net.IPv4(1, 1, 1, 1),
@@ -45,7 +46,7 @@ func Test_Wevpn_GetConnection(t *testing.T) {
 		"target IP": {
 			selection: settings.ServerSelection{
 				TargetIP: net.IPv4(2, 2, 2, 2),
-			}.WithDefaults(constants.Wevpn),
+			}.WithDefaults(providers.Wevpn),
 			servers: []models.WevpnServer{
 				{UDP: true, IPs: []net.IP{net.IPv4(1, 1, 1, 1)}},
 				{UDP: true, IPs: []net.IP{net.IPv4(2, 2, 2, 2)}},
@@ -61,7 +62,7 @@ func Test_Wevpn_GetConnection(t *testing.T) {
 		"with filter": {
 			selection: settings.ServerSelection{
 				Hostnames: []string{"b"},
-			}.WithDefaults(constants.Wevpn),
+			}.WithDefaults(providers.Wevpn),
 			servers: []models.WevpnServer{
 				{UDP: true, Hostname: "a", IPs: []net.IP{net.IPv4(1, 1, 1, 1)}},
 				{UDP: true, Hostname: "b", IPs: []net.IP{net.IPv4(2, 2, 2, 2)}},

internal/provider/wevpn/filter_test.go

@@ -6,7 +6,7 @@ import (
 	"testing"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -24,7 +24,7 @@ func Test_Wevpn_filterServers(t *testing.T) {
 		err       error
 	}{
 		"no server available": {
-			selection: settings.ServerSelection{}.WithDefaults(constants.Wevpn),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Wevpn),
 			err:       errors.New("no server found: for VPN openvpn; protocol udp"),
 		},
 		"no filter": {
@@ -33,7 +33,7 @@ func Test_Wevpn_filterServers(t *testing.T) {
 				{Hostname: "b", UDP: true},
 				{Hostname: "c", UDP: true},
 			},
-			selection: settings.ServerSelection{}.WithDefaults(constants.Wevpn),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Wevpn),
 			filtered: []models.WevpnServer{
 				{Hostname: "a", UDP: true},
 				{Hostname: "b", UDP: true},
@@ -43,7 +43,7 @@ func Test_Wevpn_filterServers(t *testing.T) {
 		"filter by protocol": {
 			selection: settings.ServerSelection{
 				OpenVPN: settings.OpenVPNSelection{TCP: boolPtr(true)},
-			}.WithDefaults(constants.Wevpn),
+			}.WithDefaults(providers.Wevpn),
 			servers: []models.WevpnServer{
 				{Hostname: "a", UDP: true},
 				{Hostname: "b", TCP: true},
@@ -56,7 +56,7 @@ func Test_Wevpn_filterServers(t *testing.T) {
 		"filter by city": {
 			selection: settings.ServerSelection{
 				Cities: []string{"b"},
-			}.WithDefaults(constants.Wevpn),
+			}.WithDefaults(providers.Wevpn),
 			servers: []models.WevpnServer{
 				{City: "a", UDP: true},
 				{City: "b", UDP: true},
@@ -69,7 +69,7 @@ func Test_Wevpn_filterServers(t *testing.T) {
 		"filter by hostname": {
 			selection: settings.ServerSelection{
 				Hostnames: []string{"b"},
-			}.WithDefaults(constants.Wevpn),
+			}.WithDefaults(providers.Wevpn),
 			servers: []models.WevpnServer{
 				{Hostname: "a", UDP: true},
 				{Hostname: "b", UDP: true},

internal/provider/wevpn/provider.go

@@ -3,7 +3,7 @@ package wevpn
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.WevpnServer, randSource rand.Source) *Wevpn {
 	return &Wevpn{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Wevpn),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Wevpn),
 	}
 }

internal/provider/windscribe/connection_test.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -23,7 +24,7 @@ func Test_Windscribe_GetConnection(t *testing.T) {
 		err        error
 	}{
 		"no server available": {
-			selection: settings.ServerSelection{}.WithDefaults(constants.Windscribe),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Windscribe),
 			err:       errors.New("no server found: for VPN openvpn; protocol udp"),
 		},
 		"no filter": {
@@ -32,7 +33,7 @@ func Test_Windscribe_GetConnection(t *testing.T) {
 				{VPN: constants.OpenVPN, IPs: []net.IP{net.IPv4(2, 2, 2, 2)}},
 				{VPN: constants.OpenVPN, IPs: []net.IP{net.IPv4(3, 3, 3, 3)}},
 			},
-			selection: settings.ServerSelection{}.WithDefaults(constants.Windscribe),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Windscribe),
 			connection: models.Connection{
 				Type:     constants.OpenVPN,
 				IP:       net.IPv4(1, 1, 1, 1),
@@ -43,7 +44,7 @@ func Test_Windscribe_GetConnection(t *testing.T) {
 		"target IP": {
 			selection: settings.ServerSelection{
 				TargetIP: net.IPv4(2, 2, 2, 2),
-			}.WithDefaults(constants.Windscribe),
+			}.WithDefaults(providers.Windscribe),
 			servers: []models.WindscribeServer{
 				{VPN: constants.OpenVPN, IPs: []net.IP{net.IPv4(1, 1, 1, 1)}},
 				{VPN: constants.OpenVPN, IPs: []net.IP{net.IPv4(2, 2, 2, 2)}},
@@ -59,7 +60,7 @@ func Test_Windscribe_GetConnection(t *testing.T) {
 		"with filter": {
 			selection: settings.ServerSelection{
 				Hostnames: []string{"b"},
-			}.WithDefaults(constants.Windscribe),
+			}.WithDefaults(providers.Windscribe),
 			servers: []models.WindscribeServer{
 				{VPN: constants.OpenVPN, Hostname: "a", IPs: []net.IP{net.IPv4(1, 1, 1, 1)}},
 				{VPN: constants.OpenVPN, Hostname: "b", IPs: []net.IP{net.IPv4(2, 2, 2, 2)}},

internal/provider/windscribe/filter_test.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
 	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -22,7 +23,7 @@ func Test_Windscribe_filterServers(t *testing.T) {
 		err       error
 	}{
 		"no server available": {
-			selection: settings.ServerSelection{}.WithDefaults(constants.Windscribe),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Windscribe),
 			err:       errors.New("no server found: for VPN openvpn; protocol udp"),
 		},
 		"no filter": {
@@ -31,7 +32,7 @@ func Test_Windscribe_filterServers(t *testing.T) {
 				{VPN: constants.OpenVPN, Hostname: "b"},
 				{VPN: constants.OpenVPN, Hostname: "c"},
 			},
-			selection: settings.ServerSelection{}.WithDefaults(constants.Windscribe),
+			selection: settings.ServerSelection{}.WithDefaults(providers.Windscribe),
 			filtered: []models.WindscribeServer{
 				{VPN: constants.OpenVPN, Hostname: "a"},
 				{VPN: constants.OpenVPN, Hostname: "b"},
@@ -41,7 +42,7 @@ func Test_Windscribe_filterServers(t *testing.T) {
 		"filter OpenVPN out": {
 			selection: settings.ServerSelection{
 				VPN: constants.Wireguard,
-			}.WithDefaults(constants.Windscribe),
+			}.WithDefaults(providers.Windscribe),
 			servers: []models.WindscribeServer{
 				{VPN: constants.OpenVPN, Hostname: "a"},
 				{VPN: constants.Wireguard, Hostname: "b"},
@@ -54,7 +55,7 @@ func Test_Windscribe_filterServers(t *testing.T) {
 		"filter by region": {
 			selection: settings.ServerSelection{
 				Regions: []string{"b"},
-			}.WithDefaults(constants.Windscribe),
+			}.WithDefaults(providers.Windscribe),
 			servers: []models.WindscribeServer{
 				{VPN: constants.OpenVPN, Region: "a"},
 				{VPN: constants.OpenVPN, Region: "b"},
@@ -67,7 +68,7 @@ func Test_Windscribe_filterServers(t *testing.T) {
 		"filter by city": {
 			selection: settings.ServerSelection{
 				Cities: []string{"b"},
-			}.WithDefaults(constants.Windscribe),
+			}.WithDefaults(providers.Windscribe),
 			servers: []models.WindscribeServer{
 				{VPN: constants.OpenVPN, City: "a"},
 				{VPN: constants.OpenVPN, City: "b"},
@@ -80,7 +81,7 @@ func Test_Windscribe_filterServers(t *testing.T) {
 		"filter by hostname": {
 			selection: settings.ServerSelection{
 				Hostnames: []string{"b"},
-			}.WithDefaults(constants.Windscribe),
+			}.WithDefaults(providers.Windscribe),
 			servers: []models.WindscribeServer{
 				{VPN: constants.OpenVPN, Hostname: "a"},
 				{VPN: constants.OpenVPN, Hostname: "b"},

internal/provider/windscribe/provider.go

@@ -3,7 +3,7 @@ package windscribe
 import (
 	"math/rand"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/provider/utils"
 )
@@ -18,6 +18,6 @@ func New(servers []models.WindscribeServer, randSource rand.Source) *Windscribe
 	return &Windscribe{
 		servers:         servers,
 		randSource:      randSource,
-		NoPortForwarder: utils.NewNoPortForwarding(constants.Windscribe),
+		NoPortForwarder: utils.NewNoPortForwarding(providers.Windscribe),
 	}
 }

internal/updater/providers.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"reflect"
 
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/updater/providers/cyberghost"
 	"github.com/qdm12/gluetun/internal/updater/providers/expressvpn"
 	"github.com/qdm12/gluetun/internal/updater/providers/fastestvpn"
@@ -196,7 +196,7 @@ func (u *updater) updatePerfectprivacy(ctx context.Context) (err error) {
 	servers, warnings, err := perfectprivacy.GetServers(ctx, u.unzipper, minServers)
 	if *u.options.CLI {
 		for _, warning := range warnings {
-			u.logger.Warn(constants.Perfectprivacy + ": " + warning)
+			u.logger.Warn(providers.Perfectprivacy + ": " + warning)
 		}
 	}
 	if err != nil {
@@ -365,7 +365,7 @@ func (u *updater) updateVPNUnlimited(ctx context.Context) (err error) {
 		ctx, u.unzipper, u.presolver, minServers)
 	if *u.options.CLI {
 		for _, warning := range warnings {
-			u.logger.Warn(constants.VPNUnlimited + ": " + warning)
+			u.logger.Warn(providers.VPNUnlimited + ": " + warning)
 		}
 	}
 	if err != nil {

internal/updater/updater.go

@@ -8,7 +8,7 @@ import (
 	"time"
 
 	"github.com/qdm12/gluetun/internal/configuration/settings"
-	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/models"
 	"github.com/qdm12/gluetun/internal/updater/resolver"
 	"github.com/qdm12/gluetun/internal/updater/unzip"
@@ -70,47 +70,47 @@ func (u *updater) UpdateServers(ctx context.Context) (allServers models.AllServe
 
 func (u *updater) getUpdateFunction(provider string) (updateFunction updateFunc) {
 	switch provider {
-	case constants.Custom:
+	case providers.Custom:
 		panic("cannot update custom provider")
-	case constants.Cyberghost:
+	case providers.Cyberghost:
 		return func(ctx context.Context) (err error) { return u.updateCyberghost(ctx) }
-	case constants.Expressvpn:
+	case providers.Expressvpn:
 		return func(ctx context.Context) (err error) { return u.updateExpressvpn(ctx) }
-	case constants.Fastestvpn:
+	case providers.Fastestvpn:
 		return func(ctx context.Context) (err error) { return u.updateFastestvpn(ctx) }
-	case constants.HideMyAss:
+	case providers.HideMyAss:
 		return func(ctx context.Context) (err error) { return u.updateHideMyAss(ctx) }
-	case constants.Ipvanish:
+	case providers.Ipvanish:
 		return func(ctx context.Context) (err error) { return u.updateIpvanish(ctx) }
-	case constants.Ivpn:
+	case providers.Ivpn:
 		return func(ctx context.Context) (err error) { return u.updateIvpn(ctx) }
-	case constants.Mullvad:
+	case providers.Mullvad:
 		return func(ctx context.Context) (err error) { return u.updateMullvad(ctx) }
-	case constants.Nordvpn:
+	case providers.Nordvpn:
 		return func(ctx context.Context) (err error) { return u.updateNordvpn(ctx) }
-	case constants.Perfectprivacy:
+	case providers.Perfectprivacy:
 		return func(ctx context.Context) (err error) { return u.updatePerfectprivacy(ctx) }
-	case constants.Privado:
+	case providers.Privado:
 		return func(ctx context.Context) (err error) { return u.updatePrivado(ctx) }
-	case constants.PrivateInternetAccess:
+	case providers.PrivateInternetAccess:
 		return func(ctx context.Context) (err error) { return u.updatePIA(ctx) }
-	case constants.Privatevpn:
+	case providers.Privatevpn:
 		return func(ctx context.Context) (err error) { return u.updatePrivatevpn(ctx) }
-	case constants.Protonvpn:
+	case providers.Protonvpn:
 		return func(ctx context.Context) (err error) { return u.updateProtonvpn(ctx) }
-	case constants.Purevpn:
+	case providers.Purevpn:
 		return func(ctx context.Context) (err error) { return u.updatePurevpn(ctx) }
-	case constants.Surfshark:
+	case providers.Surfshark:
 		return func(ctx context.Context) (err error) { return u.updateSurfshark(ctx) }
-	case constants.Torguard:
+	case providers.Torguard:
 		return func(ctx context.Context) (err error) { return u.updateTorguard(ctx) }
-	case constants.VPNUnlimited:
+	case providers.VPNUnlimited:
 		return func(ctx context.Context) (err error) { return u.updateVPNUnlimited(ctx) }
-	case constants.Vyprvpn:
+	case providers.Vyprvpn:
 		return func(ctx context.Context) (err error) { return u.updateVyprvpn(ctx) }
-	case constants.Wevpn:
+	case providers.Wevpn:
 		return func(ctx context.Context) (err error) { return u.updateWevpn(ctx) }
-	case constants.Windscribe:
+	case providers.Windscribe:
 		return func(ctx context.Context) (err error) { return u.updateWindscribe(ctx) }
 	default:
 		panic("provider " + provider + " is unknown")