Feat: Perfect privacy support (#606)

internal/configuration/perfectprivacy.go

@@ -0,0 +1,43 @@
+package configuration
+
+import (
+	"fmt"
+
+	"github.com/qdm12/gluetun/internal/constants"
+)
+
+func (settings *Provider) readPerfectPrivacy(r reader) (err error) {
+	settings.Name = constants.Perfectprivacy
+	servers := r.servers.GetPerfectprivacy()
+
+	settings.ServerSelection.TargetIP, err = readTargetIP(r.env)
+	if err != nil {
+		return err
+	}
+
+	settings.ServerSelection.Cities, err = r.env.CSVInside("CITY", constants.PerfectprivacyCityChoices(servers))
+	if err != nil {
+		return fmt.Errorf("environment variable CITY: %w", err)
+	}
+
+	return settings.ServerSelection.OpenVPN.readPerfectPrivacy(r)
+}
+
+func (settings *OpenVPNSelection) readPerfectPrivacy(r reader) (err error) {
+	settings.TCP, err = readOpenVPNProtocol(r)
+	if err != nil {
+		return err
+	}
+
+	portValidation := openvpnPortValidation{
+		tcp:        settings.TCP,
+		allowedTCP: []uint16{44, 443, 4433},
+		allowedUDP: []uint16{44, 443, 4433},
+	}
+	settings.CustomPort, err = readOpenVPNCustomPort(r, portValidation)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}