General fixes

Fixed most compiler warnings. Changed used interface from utun0/utun1 to lynx0

src/server/main.cpp

@@ -66,7 +66,7 @@ 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>("lynx0");
         log("Using virtual interface: " + tun->getName());
 
         // Generate a temporary keypair, replace with actual CA signed keys later (Note, these are stored in memory)

src/server/server/net/tcp/tcp_connection.cpp

@@ -118,7 +118,14 @@ namespace ColumnLynx::Net::TCP {
                 std::memcpy(signPk.data(), data.data() + 1, std::min(data.size() - 1, sizeof(signPk)));
 
                 // We can safely store this without further checking, the client will need to send the encrypted AES key in a way where they must possess the corresponding private key anyways.
-                crypto_sign_ed25519_pk_to_curve25519(mConnectionPublicKey.data(), signPk.data()); // Store the client's public encryption key key (for identification)
+                int r = crypto_sign_ed25519_pk_to_curve25519(mConnectionPublicKey.data(), signPk.data()); // Store the client's public encryption key key (for identification)
+                if (r != 0) {
+                    Utils::error("Conversion of client signing key to encryption key failed! Killing connection from " + reqAddr);
+                    disconnect();
+
+                    return;
+                }
+
                 Utils::debug("Client " + reqAddr + " converted public encryption key: " + Utils::bytesToHexString(mConnectionPublicKey.data(), 32));
                 
                 Utils::debug("Key attempted connect: " + Utils::bytesToHexString(signPk.data(), signPk.size()));

src/server/server/net/tcp/tcp_server.cpp

@@ -2,8 +2,6 @@
 // Copyright (C) 2025 DcruBro
 // Distributed under the terms of the GNU General Public License, either version 2 only or version 3. See LICENSES/ for details.
 
-#pragma once
-
 #include <columnlynx/server/net/tcp/tcp_server.hpp>
 
 #include <cstdint>
@@ -63,7 +61,7 @@ namespace ColumnLynx::Net::TCP {
 
         // Snapshot to avoid iterator invalidation while callbacks erase()
         std::vector<std::shared_ptr<TCPConnection>> snapshot(mClients.begin(), mClients.end());
-        for (auto& client : snapshot) {
+        for (auto &client : snapshot) {
             try {
                 client->disconnect(); // should shutdown+close the socket
                 Utils::log("GRACEFUL_DISCONNECT sent to session: " + std::to_string(client->getSessionID()));