Fix byte order for sessionid, add 64-bit conversion helpers - damn you C standard for no htonl/ntohl for 64-bit :(

src/client/main.cpp

@@ -63,7 +63,7 @@ int main(int argc, char** argv) {
         WintunInitialize();
 #endif
 
-        std::shared_ptr<VirtualInterface> tun = std::make_shared<VirtualInterface>("utun0");
+        std::shared_ptr<VirtualInterface> tun = std::make_shared<VirtualInterface>("utun1");
         log("Using virtual interface: " + tun->getName());
 
         LibSodiumWrapper sodiumWrapper = LibSodiumWrapper();
@@ -111,4 +111,4 @@ int main(int argc, char** argv) {
     } catch (const std::exception& e) {
         error("Client error: " + std::string(e.what()));
     }
-}
+}

src/client/net/tcp/tcp_client.cpp

@@ -247,6 +247,9 @@ namespace ColumnLynx::Net::TCP {
 
                     std::memcpy(&mConnectionSessionID, decrypted.data(), sizeof(mConnectionSessionID));
                     std::memcpy(&mTunConfig, decrypted.data() + sizeof(mConnectionSessionID), sizeof(Protocol::TunConfig));
+
+                    mConnectionSessionID = Utils::be64toh(mConnectionSessionID);
+
                     Utils::log("Connection established with Session ID: " + std::to_string(mConnectionSessionID));
                 
                     if (mSessionIDRef) { // Copy to the global reference