Method onError

tests/test_proto.cpp:107–107

    void onDisconnected(std::shared_ptr<TCPSession>& session) override { disconnected = true; --clients; }
    size_t onSend(const void* data, size_t size) override { Multicast(data, size); return size; }
    void onError(int error, const std::string& category, const std::string& message) override { errors = true; }

public:
    std::atomic<bool> started{false};