refactoring

Co-authored-by: n.fedorov <mail@nfedorov.dev>
Co-committed-by: n.fedorov <mail@nfedorov.dev>

include/nxst/domain/protocol.hpp

@@ -0,0 +1,16 @@
+#pragma once
+
+namespace proto {
+    constexpr uint16_t kTcpPort = 8080;
+    constexpr uint16_t kMulticastPort = 8081;
+    constexpr char kMulticastGroup[] = "239.0.0.1";
+    constexpr size_t kBufSize = 65536;
+    constexpr uint32_t kMaxFilename = 4096;
+    constexpr uint32_t kEofSentinel = 0;
+
+    // Wire layout per file:
+    //   [filename_len : uint32_t LE]   — 0 == end-of-stream
+    //   [filename     : filename_len bytes]
+    //   [file_size    : uint64_t LE]
+    //   [file_data    : file_size bytes]
+}  // namespace proto