diff --git a/daemon/config.hpp b/daemon/config.hpp
index 4fc4700..f800b18 100644
--- a/daemon/config.hpp
+++ b/daemon/config.hpp
@@ -71,7 +71,7 @@ class Config {
 
   void set_http_port(uint16_t http_port) { http_port_ = http_port; };
   void set_rtsp_port(uint16_t rtsp_port) { rtsp_port_ = rtsp_port; };
-  void set_http_base_dir(const std::string& http_base_dir) {
+  void set_http_base_dir(std::string_view http_base_dir) {
     http_base_dir_ = http_base_dir;
   };
   void set_log_severity(int log_severity) { log_severity_ = log_severity; };
@@ -85,10 +85,10 @@ class Config {
     max_tic_frame_size_ = max_tic_frame_size;
   };
   void set_sample_rate(uint32_t sample_rate) { sample_rate_ = sample_rate; };
-  void set_rtp_mcast_base(const std::string& rtp_mcast_base) {
+  void set_rtp_mcast_base(std::string_view rtp_mcast_base) {
     rtp_mcast_base_ = rtp_mcast_base;
   };
-  void set_sap_mcast_addr(const std::string& sap_mcast_addr) {
+  void set_sap_mcast_addr(std::string_view sap_mcast_addr) {
     sap_mcast_addr_ = sap_mcast_addr;
   };
   void set_rtp_port(uint16_t rtp_port) { rtp_port_ = rtp_port; };
@@ -97,30 +97,30 @@ class Config {
   void set_sap_interval(uint16_t sap_interval) {
     sap_interval_ = sap_interval;
   };
-  void set_syslog_proto(const std::string& syslog_proto) {
+  void set_syslog_proto(std::string_view syslog_proto) {
     syslog_proto_ = syslog_proto;
   };
-  void set_syslog_server(const std::string& syslog_server) {
+  void set_syslog_server(std::string_view syslog_server) {
     syslog_server_ = syslog_server;
   };
-  void set_status_file(const std::string& status_file) {
+  void set_status_file(std::string_view status_file) {
     status_file_ = status_file;
   };
-  void set_interface_name(const std::string& interface_name) {
+  void set_interface_name(std::string_view interface_name) {
     interface_name_ = interface_name;
   };
-  void set_ip_addr_str(const std::string& ip_str) { ip_str_ = ip_str; };
+  void set_ip_addr_str(std::string_view ip_str) { ip_str_ = ip_str; };
   void set_ip_addr(uint32_t ip_addr) { ip_addr_ = ip_addr; };
-  void set_mac_addr_str(const std::string& mac_str) { mac_str_ = mac_str; };
+  void set_mac_addr_str(std::string_view mac_str) { mac_str_ = mac_str; };
   void set_mac_addr(const std::array<uint8_t, 6>& mac_addr) {
     mac_addr_ = mac_addr;
   };
   void set_mdns_enabled(bool enabled) { mdns_enabled_ = enabled; };
   void set_interface_idx(int index) { interface_idx_ = index; };
-  void set_ptp_status_script(const std::string& script) {
+  void set_ptp_status_script(std::string_view script) {
     ptp_status_script_ = script;
   };
-  void set_custom_node_id(const std::string& node_id) {
+  void set_custom_node_id(std::string_view node_id) {
     custom_node_id_ = node_id;
   };
   void set_auto_sinks_update(bool auto_sinks_update) {
diff --git a/daemon/mdns_client.hpp b/daemon/mdns_client.hpp
index bfe1ecf..fd15117 100644
--- a/daemon/mdns_client.hpp
+++ b/daemon/mdns_client.hpp
@@ -39,7 +39,7 @@
 
 class MDNSClient {
  public:
-  MDNSClient(std::shared_ptr<Config> config) : config_(config){};
+  explicit MDNSClient(std::shared_ptr<Config> config) : config_(config){};
   MDNSClient() = delete;
   MDNSClient(const MDNSClient&) = delete;
   MDNSClient& operator=(const MDNSClient&) = delete;
diff --git a/daemon/mdns_server.hpp b/daemon/mdns_server.hpp
index 3e02fe6..a2aa875 100644
--- a/daemon/mdns_server.hpp
+++ b/daemon/mdns_server.hpp
@@ -51,7 +51,7 @@ class MDNSServer {
   virtual bool init();
   virtual bool terminate();
 
-  bool add_service(const std::string& name, const std::string& sdp);
+  bool add_service(const std::string& name, const std::string &sdp);
   bool remove_service(const std::string& name);
 
  protected:
diff --git a/daemon/netlink_client.hpp b/daemon/netlink_client.hpp
index a085bc2..f8ce5e8 100644
--- a/daemon/netlink_client.hpp
+++ b/daemon/netlink_client.hpp
@@ -35,7 +35,7 @@ using boost::asio::deadline_timer;
 class NetlinkClient {
  public:
   NetlinkClient() = delete;
-  NetlinkClient(const std::string& name) : name_(name) {}
+  explicit NetlinkClient(const std::string& name) : name_(name) {}
 
   void init(const nl_endpoint<nl_protocol>& listen_endpoint,
             const nl_protocol& protocol) {
diff --git a/daemon/rtsp_client.cpp b/daemon/rtsp_client.cpp
index 2f87771..ff085e2 100644
--- a/daemon/rtsp_client.cpp
+++ b/daemon/rtsp_client.cpp
@@ -112,6 +112,9 @@ struct RtspActiveClientRemover {
     }
   }
 
+  RtspActiveClientRemover(const RtspActiveClientRemover&) = delete;
+  RtspActiveClientRemover& operator=(const RtspActiveClientRemover&) = delete;
+
  private:
   ip::tcp::iostream* stream_{nullptr};
   const std::string& name_;
diff --git a/daemon/session_manager.cpp b/daemon/session_manager.cpp
index b7a86e3..7c1a18d 100644
--- a/daemon/session_manager.cpp
+++ b/daemon/session_manager.cpp
@@ -38,7 +38,7 @@
 #include "session_manager.hpp"
 #include "interface.hpp"
 
-static uint8_t get_codec_word_length(const std::string& codec) {
+static uint8_t get_codec_word_length(std::string_view codec) {
   if (codec == "L16") {
     return 2;
   }
@@ -60,7 +60,7 @@ static uint8_t get_codec_word_length(const std::string& codec) {
   return 0;
 }
 
-bool SessionManager::parse_sdp(const std::string sdp, StreamInfo& info) const {
+bool SessionManager::parse_sdp(const std::string& sdp, StreamInfo& info) const {
   /*
   v=0
   o=- 4 0 IN IP4 10.0.0.12
@@ -923,7 +923,7 @@ std::error_code SessionManager::get_sink_status(
   return ret;
 }
 
-std::error_code SessionManager::set_driver_config(const std::string& name,
+std::error_code SessionManager::set_driver_config(std::string_view name,
                                                   uint32_t value) const {
   if (name == "sample_rate")
     return driver_->set_sample_rate(value);
@@ -1103,8 +1103,9 @@ void SessionManager::on_ptp_status_changed(const std::string& status) const {
       for (int i = STDERR_FILENO + 1; i < fdlimit; i++)
         close(i);
 
-      char* argv_list[] = {(char*)(config_->get_ptp_status_script().c_str()),
-                           (char*)(status.c_str()), nullptr};
+      char* argv_list[] = {
+          const_cast<char*>(config_->get_ptp_status_script().c_str()),
+          const_cast<char*>(status.c_str()), nullptr};
 
       execv(config_->get_ptp_status_script().c_str(), argv_list);
       exit(0);
@@ -1142,7 +1143,8 @@ bool SessionManager::worker() {
         // return false;
       } else {
         char ptp_clock_id[24];
-        uint8_t* pui64GMID = reinterpret_cast<uint8_t*>(&ptp_status.ui64GMID);
+        const uint8_t* pui64GMID =
+            reinterpret_cast<uint8_t*>(&ptp_status.ui64GMID);
         snprintf(ptp_clock_id, sizeof(ptp_clock_id),
                  "%02X-%02X-%02X-%02X-%02X-%02X-%02X-%02X", pui64GMID[0],
                  pui64GMID[1], pui64GMID[2], pui64GMID[3], pui64GMID[4],
diff --git a/daemon/session_manager.hpp b/daemon/session_manager.hpp
index 734b75a..8ead203 100644
--- a/daemon/session_manager.hpp
+++ b/daemon/session_manager.hpp
@@ -158,7 +158,7 @@ class SessionManager {
   uint8_t get_sink_id(const std::string& name) const;
 
   std::error_code set_ptp_config(const PTPConfig& config);
-  std::error_code set_driver_config(const std::string& name,
+  std::error_code set_driver_config(std::string_view name,
                                     uint32_t value) const;
   void get_ptp_config(PTPConfig& config) const;
   void get_ptp_status(PTPStatus& status) const;
@@ -197,7 +197,7 @@ class SessionManager {
   bool sink_is_still_valid(const std::string sdp,
                            const std::list<RemoteSource> sources_list) const;
 
-  bool parse_sdp(const std::string sdp, StreamInfo& info) const;
+  bool parse_sdp(const std::string& sdp, StreamInfo& info) const;
   bool worker();
   // singleton, use create() to build
   explicit SessionManager(std::shared_ptr<DriverManager> driver,
diff --git a/daemon/utils.cpp b/daemon/utils.cpp
index 9533a1c..30fc8c2 100644
--- a/daemon/utils.cpp
+++ b/daemon/utils.cpp
@@ -99,7 +99,7 @@ std::string sdp_get_subject(const std::string& sdp) {
   return "";
 }
 
-SDPOrigin sdp_get_origin(const std::string sdp) {
+SDPOrigin sdp_get_origin(const std::string& sdp) {
   SDPOrigin origin;
   try {
     std::stringstream sstream(sdp);
diff --git a/daemon/utils.hpp b/daemon/utils.hpp
index c0757db..2085f11 100644
--- a/daemon/utils.hpp
+++ b/daemon/utils.hpp
@@ -55,6 +55,6 @@ struct SDPOrigin {
   }
 };
 
-SDPOrigin sdp_get_origin(const std::string sdp);
+SDPOrigin sdp_get_origin(const std::string& sdp);
 
 #endif