1 files changed, 55 insertions, 0 deletions
diff --git a/source/core/StarNetCompatibility.hpp b/source/core/StarNetCompatibility.hpp
new file mode 100644
index 0000000..4b950ab
--- /dev/null
+++ b/source/core/StarNetCompatibility.hpp
@@ -0,0 +1,55 @@
+#pragma once
+#include "StarVersion.hpp"
+#include "StarHash.hpp"
+
+namespace Star {
+
+extern VersionNumber const OpenProtocolVersion;
+
+constexpr VersionNumber AnyVersion = 0xFFFFFFFF;
+constexpr VersionNumber LegacyVersion = 0;
+
+class NetCompatibilityRules {
+public:
+  NetCompatibilityRules();
+  NetCompatibilityRules(uint64_t) = delete;
+  NetCompatibilityRules(VersionNumber version);
+
+  VersionNumber version() const;
+  void setVersion(VersionNumber version);
+  bool isLegacy() const;
+
+  bool operator==(NetCompatibilityRules const& a) const;
+
+private:
+  VersionNumber m_version = OpenProtocolVersion;
+};
+
+inline NetCompatibilityRules::NetCompatibilityRules() : m_version(OpenProtocolVersion) {}
+
+inline NetCompatibilityRules::NetCompatibilityRules(VersionNumber v) : m_version(v) {}
+
+inline VersionNumber NetCompatibilityRules::version() const {
+  return m_version;
+}
+
+inline void NetCompatibilityRules::setVersion(VersionNumber version) {
+  m_version = version;
+}
+
+inline bool NetCompatibilityRules::isLegacy() const {
+  return m_version == LegacyVersion;
+}
+
+inline bool NetCompatibilityRules::operator==(NetCompatibilityRules const& a) const {
+  return m_version == a.m_version;
+}
+
+template <>
+struct hash<NetCompatibilityRules> {
+  size_t operator()(NetCompatibilityRules const& s) const {
+    return s.version();
+  }
+};
+
+}
+\ No newline at end of file