fix(settings): read env for control server

internal/configuration/sources/env/reader.go

@@ -77,6 +77,11 @@ func (r *Reader) Read() (settings settings.Settings, err error) {
 		return settings, err
 	}
 
+	settings.ControlServer, err = readControlServer()
+	if err != nil {
+		return settings, err
+	}
+
 	return settings, nil
 }
 

internal/configuration/sources/env/server.go

@@ -0,0 +1,53 @@
+package env
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/qdm12/gluetun/internal/configuration/settings"
+	"github.com/qdm12/govalid/binary"
+	"github.com/qdm12/govalid/port"
+)
+
+func readControlServer() (controlServer settings.ControlServer, err error) {
+	controlServer.Log, err = readControlServerLog()
+	if err != nil {
+		return controlServer, err
+	}
+
+	controlServer.Port, err = readControlServerPort()
+	if err != nil {
+		return controlServer, err
+	}
+
+	return controlServer, nil
+}
+
+func readControlServerLog() (enabled *bool, err error) {
+	s := os.Getenv("HTTP_CONTROL_SERVER_LOG")
+	if s == "" {
+		return nil, nil //nolint:nilnil
+	}
+
+	log, err := binary.Validate(s)
+	if err != nil {
+		return nil, fmt.Errorf("environment variable HTTP_CONTROL_SERVER_LOG: %w", err)
+	}
+
+	return &log, nil
+}
+
+func readControlServerPort() (p *uint16, err error) {
+	s := os.Getenv("HTTP_CONTROL_SERVER_PORT")
+	if s == "" {
+		return nil, nil //nolint:nilnil
+	}
+
+	p = new(uint16)
+	*p, err = port.Validate(s, port.OptionPortListening(os.Geteuid()))
+	if err != nil {
+		return nil, fmt.Errorf("environment variable HTTP_CONTROL_SERVER_PORT: %w", err)
+	}
+
+	return p, nil
+}