Add call protocol, Rmux. Update AmneziaWG. Fixes and improvements

transport/call/dion/zip.go

@@ -0,0 +1,49 @@
+package dion
+
+import (
+	"bytes"
+	"compress/gzip"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io"
+)
+
+func ZipEncode(value any) (string, error) {
+	plain, err := json.Marshal(value)
+	if err != nil {
+		return "", fmt.Errorf("marshal: %w", err)
+	}
+	var compressed bytes.Buffer
+	gz := gzip.NewWriter(&compressed)
+	if _, err := gz.Write(plain); err != nil {
+		return "", fmt.Errorf("gzip write: %w", err)
+	}
+	if err := gz.Close(); err != nil {
+		return "", fmt.Errorf("gzip close: %w", err)
+	}
+	return base64.StdEncoding.EncodeToString(compressed.Bytes()), nil
+}
+
+func ZipDecode(encoded string, out any) error {
+	raw, err := base64.StdEncoding.DecodeString(encoded)
+	if err != nil {
+		return fmt.Errorf("base64: %w", err)
+	}
+	reader, err := gzip.NewReader(bytes.NewReader(raw))
+	if err != nil {
+		return fmt.Errorf("gzip reader: %w", err)
+	}
+	defer reader.Close()
+	plain, err := io.ReadAll(reader)
+	if err != nil {
+		return fmt.Errorf("gzip read: %w", err)
+	}
+	if out == nil {
+		return nil
+	}
+	if err := json.Unmarshal(plain, out); err != nil {
+		return fmt.Errorf("unmarshal: %w", err)
+	}
+	return nil
+}