telnet.hh
/* telnet.hh - implementation of the telnet protocol
* Copyright 2003 Bas Wijnen <wijnen@debian.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef SHEVEK_TELNET_HH
#define SHEVEK_TELNET_HH
#include "socket.hh"
namespace shevek
{
class telnet : public socket
{
// These are ideal for an enum, in a sense, but the values are really char constants, and C++ doesn't allow that for enums. So the choice is to cast the enum value to a char, or to not use an enum. I don't like casts.
// Command constants
static char const SE = '\xf0';
static char const NOP = '\xf1';
static char const MARK = '\xf2';
static char const BREAK = '\xf3';
static char const IP = '\xf4';
static char const AO = '\xf5';
static char const AYT = '\xf6';
static char const EC = '\xf7';
static char const EL = '\xf8';
static char const GA = '\xf9';
static char const SB = '\xfa';
static char const WILL = '\xfb';
static char const WONT = '\xfc';
static char const DO = '\xfd';
static char const DONT = '\xfe';
static char const IAC = '\xff';
// Option constants.
static char const BINARY = '\x00';
static char const ECHO = '\x01';
static char const SUPPRESS_GA = '\x03';
static char const STATUS = '\x05';
static char const TIMING_MARK = '\x06';
static char const EXOPL = '\xff';
enum option_idx {
BINARY_IDX = 0,
ECHO_IDX = 1,
SUPPRESS_GA_IDX = 2,
STATUS_IDX = 3,
TIMING_MARK_IDX = 4,
EXOPL_IDX = 5
};
struct option_t;
typedef void (telnet::*action)(option_t *opt);
struct option_t
{
char type;
action will, wont, doo, dont;
bool here, there, not_both;
};
static option_t options[6];
option_t nop_option;
option_t *s_find (char opt);
void nop (option_t *);
void nopwill (option_t *opt);
void nopdo (option_t *opt);
void l_will (option_t *opt);
void l_wont (option_t *opt);
void l_do (option_t *opt);
void l_dont (option_t *opt);
void will_check (option_t *opt);
void do_check (option_t *opt);
void wont_check (option_t *opt);
void dont_check (option_t *opt);
void l_do_sub (std::string const &data, std::string::size_type &pos);
bool m_ignore;
void l_in_filter (std::string &data);
void l_out_filter (std::string &data);
std::string m_am_here, m_inbuffer;
protected:
telnet (Glib::RefPtr <Glib::MainContext> main);
public:
static Glib::RefPtr <telnet> create (Glib::RefPtr <Glib::MainContext> main = Glib::MainContext::get_default () );
std::string &you_there ();
};
}
#endif
shevek::telnet::telnet
telnet(Glib::RefPtr< Glib::MainContext > main)
Derived classes have their own create function and may call the constructor.
shevek
Definition: args.hh:52
shevek::telnet
Input and output filters for shevek::socket to make them telnet sockets.
Definition: telnet.hh:26
shevek::socket
Use a unix-domain, tcp or avahi network connection with shevek::fd.
Definition: socket.hh:36
shevek::telnet::you_there
std::string & you_there()
Return the string that is used in reply to ARE_YOU_THERE requests.
shevek::telnet::create
static Glib::RefPtr< telnet > create(Glib::RefPtr< Glib::MainContext > main=Glib::MainContext::get_default())
Create a new telnet socket.