add a command line option to disable ZMQ server

src/daemon/command_line_args.h

@@ -122,6 +122,11 @@ namespace daemon_args
     }
   };
 
+  const command_line::arg_descriptor<bool> arg_zmq_rpc_disabled = {
+    "no-zmq"
+  , "Disable ZMQ RPC server"
+  };
+
 }  // namespace daemon_args
 
 #endif // DAEMON_COMMAND_LINE_ARGS_H

src/daemon/daemon.cpp

@@ -104,6 +104,7 @@ t_daemon::t_daemon(
 {
   zmq_rpc_bind_port = command_line::get_arg(vm, daemon_args::arg_zmq_rpc_bind_port);
   zmq_rpc_bind_address = command_line::get_arg(vm, daemon_args::arg_zmq_rpc_bind_ip);
+  zmq_rpc_disabled = command_line::get_arg(vm, daemon_args::arg_zmq_rpc_disabled);
 }
 
 t_daemon::~t_daemon() = default;
@@ -170,25 +171,30 @@ bool t_daemon::run(bool interactive)
     cryptonote::rpc::DaemonHandler rpc_daemon_handler(mp_internals->core.get(), mp_internals->p2p.get());
     cryptonote::rpc::ZmqServer zmq_server(rpc_daemon_handler);
 
-    if (!zmq_server.addTCPSocket(zmq_rpc_bind_address, zmq_rpc_bind_port))
+    if (!zmq_rpc_disabled)
     {
-      LOG_ERROR(std::string("Failed to add TCP Socket (") + zmq_rpc_bind_address
-          + ":" + zmq_rpc_bind_port + ") to ZMQ RPC Server");
+      if (!zmq_server.addTCPSocket(zmq_rpc_bind_address, zmq_rpc_bind_port))
+      {
+        LOG_ERROR(std::string("Failed to add TCP Socket (") + zmq_rpc_bind_address
+            + ":" + zmq_rpc_bind_port + ") to ZMQ RPC Server");
 
-      if (rpc_commands)
-        rpc_commands->stop_handling();
+        if (rpc_commands)
+          rpc_commands->stop_handling();
 
-      for(auto& rpc : mp_internals->rpcs)
-        rpc->stop();
+        for(auto& rpc : mp_internals->rpcs)
+          rpc->stop();
 
-      return false;
+        return false;
+      }
+
+      MINFO("Starting ZMQ server...");
+      zmq_server.run();
+
+      MINFO(std::string("ZMQ server started at ") + zmq_rpc_bind_address
+            + ":" + zmq_rpc_bind_port + ".");
     }
-
-    MINFO("Starting ZMQ server...");
-    zmq_server.run();
-
-    MINFO(std::string("ZMQ server started at ") + zmq_rpc_bind_address
-          + ":" + zmq_rpc_bind_port + ".");
+    else
+      MINFO("ZMQ server disabled");
 
     if (public_rpc_port > 0)
     {
@@ -201,7 +207,8 @@ bool t_daemon::run(bool interactive)
     if (rpc_commands)
       rpc_commands->stop_handling();
 
-    zmq_server.stop();
+    if (!zmq_rpc_disabled)
+      zmq_server.stop();
 
     for(auto& rpc : mp_internals->rpcs)
       rpc->stop();

src/daemon/daemon.h

@@ -46,6 +46,7 @@ private:
   uint16_t public_rpc_port;
   std::string zmq_rpc_bind_address;
   std::string zmq_rpc_bind_port;
+  bool zmq_rpc_disabled;
 public:
   t_daemon(
       boost::program_options::variables_map const & vm,

src/daemon/main.cpp

@@ -141,6 +141,7 @@ int main(int argc, char const * argv[])
       command_line::add_arg(core_settings, daemon_args::arg_public_node);
       command_line::add_arg(core_settings, daemon_args::arg_zmq_rpc_bind_ip);
       command_line::add_arg(core_settings, daemon_args::arg_zmq_rpc_bind_port);
+      command_line::add_arg(core_settings, daemon_args::arg_zmq_rpc_disabled);
 
       daemonizer::init_options(hidden_options, visible_options);
       daemonize::t_executor::init_options(core_settings);