MQTT会话超时与网络错误处理

main/protocols/protocol.h

@@ -4,6 +4,7 @@
 #include <cJSON.h>
 #include <string>
 #include <functional>
+#include <chrono>
 
 struct BinaryProtocol3 {
     uint8_t type;
@@ -60,9 +61,13 @@ protected:
     std::function<void(const std::string& message)> on_network_error_;
 
     int server_sample_rate_ = 16000;
+    bool error_occurred_ = false;
     std::string session_id_;
+    std::chrono::time_point<std::chrono::steady_clock> last_incoming_time_;
 
     virtual void SendText(const std::string& text) = 0;
+    virtual void SetError(const std::string& message);
+    virtual bool IsTimeout() const;
 };
 
 #endif // PROTOCOL_H