can NOT connect telnet
yanzixiang opened this issue · comments
/*******************************************************************************
* CLI - A simple command line interface.
* Copyright (C) 2016-2021 Daniele Pallastrelli
*
* Boost Software License - Version 1.0 - August 17th, 2003
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#include <cli/standaloneasioscheduler.h>
#include <cli/cli.h>
#include <cli/clilocalsession.h>
#include <cli/standaloneasioremotecli.h>
using namespace cli;
using namespace std;
namespace cli
{
using MainScheduler = StandaloneAsioScheduler;
using CliTelnetServer = StandaloneAsioCliTelnetServer;
} // namespace cli
#if ASIO_VERSION < 101200
using IoContext = asio::io_service;
#else
using IoContext = asio::io_context;
#endif
class UserInterface
{
public:
explicit UserInterface(IoContext& iocontext) : scheduler(iocontext)
{
auto rootMenu = make_unique< Menu >("cli");
rootMenu->Insert(
"hello",
[](std::ostream& out) { out << "Hello, world\n"; },
"Print hello world");
colorCmd = rootMenu->Insert(
"color",
[&](std::ostream& out)
{
out << "Colors ON\n";
SetColor();
colorCmd.Disable();
nocolorCmd.Enable();
},
"Enable colors in the cli");
nocolorCmd = rootMenu->Insert(
"nocolor",
[&](std::ostream& out)
{
out << "Colors OFF\n";
SetNoColor();
colorCmd.Enable();
nocolorCmd.Disable();
},
"Disable colors in the cli");
cli = make_unique<Cli>(std::move(rootMenu));
// global exit action
cli->ExitAction([](auto& out) { out << "Goodbye and thanks for all the fish.\n"; });
// std exception custom handler
cli->StdExceptionHandler(
[](std::ostream& out, const std::string& cmd, const std::exception& e)
{
out << "Exception caught in cli handler: "
<< e.what()
<< " handling command: "
<< cmd
<< ".\n";
}
);
localSession = make_unique<CliLocalTerminalSession>(*cli, scheduler, std::cout, 200);
localSession->ExitAction(
[this](auto& out) // session exit action
{
out << "Closing App...\n";
scheduler.Stop();
}
);
// setup server
server = make_unique<CliTelnetServer>(*cli, scheduler, 5000);
// exit action for all the connections
server->ExitAction([](auto& out) { out << "Terminating this session...\n"; });
}
private:
StandaloneAsioScheduler scheduler;
unique_ptr<Cli> cli;
unique_ptr<CliLocalTerminalSession> localSession;
unique_ptr<CliTelnetServer> server;
CmdHandler colorCmd;
CmdHandler nocolorCmd;
};
int main()
{
try
{
// main application that creates an asio io_context and uses it
IoContext iocontext;
asio::steady_timer timer(iocontext, std::chrono::seconds(5));
timer.async_wait([](const error_code&) { cout << "Timer expired!\n"; });
// cli setup
UserInterface interface(iocontext);
// start the asio io_context
#if ASIO_VERSION < 101200
asio::io_service::work work(iocontext);
#else
auto work = asio::make_work_guard(iocontext);
#endif
iocontext.run();
return 0;
}
catch (const std::exception& e)
{
cerr << "Exception caugth in main: " << e.what() << '\n';
}
catch (...)
{
cerr << "Unknown exception caugth in main.\n";
}
return -1;
}
when connect with windows telnet client
when connect with linux telnet client
I've just tried the same example, with last cli version and asio v. 1.12.2.
Compiled with GCC and running under Linux, it works fine with linux telnet.
I did several test and they always worked.
I guess it's something in your environment.