Source: ../../cli/cli_client.hh
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// -*- c-basic-offset: 4; tab-width: 8; indent-tabs-mode: t -*-
// Copyright (c) 2001-2009 XORP, Inc.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License, Version 2, June
// 1991 as published by the Free Software Foundation. Redistribution
// and/or modification of this program under the terms of any other
// version of the GNU General Public License is not permitted.
//
// 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. For more details,
// see the GNU General Public License, Version 2, a copy of which can be
// found in the XORP LICENSE.gpl file.
//
// XORP Inc, 2953 Bunker Hill Lane, Suite 204, Santa Clara, CA 95054, USA;
// http://xorp.net
// $XORP: xorp/cli/cli_client.hh,v 1.39 2009/01/05 18:30:45 jtc Exp $
#ifndef __CLI_CLI_CLIENT_HH__
#define __CLI_CLI_CLIENT_HH__
//
// CLI client definition.
//
#include "libxorp/xorp.h"
#include "libxorp/buffer.hh"
#include "libxorp/ipvx.hh"
#include "libxorp/xorpfd.hh"
#include "libxorp/eventloop.hh"
#include "libxorp/timer.hh"
#include "cli_node.hh"
#include <list>
//
// Constants definitions
//
//
// Structures/classes, typedefs and macros
//
class CliNode;
class CliCommand;
/**
* @short The class for the CLI client.
*
* There is one CLI client per CLI user (e.g., telnet connection).
*/
class CliClient {
public:
/**
* Constructor for a given CLI node and file descriptor.
*
* @param init_cli_node the @ref CliNode CLI node this client belongs to.
* @param input_fd the file descriptor for the CLI client to read
* data from.
* @param output_fd the file descriptor for the CLI client to write
* data to.
* @param startup_cli_prompt the startup CLI prompt.
*/
CliClient(CliNode& init_cli_node, XorpFd input_fd, XorpFd output_fd,
const string& startup_cli_prompt);
/**
* Destructor
*/
virtual ~CliClient();
/**
* Test if the processing of any pending commands or pending data has
* complated.
*
* @return true if processing of any pending commands or pending data
* has completed, otherwise false.
*/
bool done() const;
/**
* Start the connection.
*
* @param error_msg the error message (if error).
* @return XORP_OK on success, otherwise XORP_ERROR.
*/
int start_connection(string& error_msg);
/**
* Stop the connection.
*
* @param error_msg the error message (if error).
* @return XORP_OK on success, otherwise XORP_ERROR.
*/
int stop_connection(string& error_msg);
/**
* Print a message to the CLI user.
*
* @param msg C++ string with the message to display.
* @return the number of characters printed (not including
* the trailing '\0').
*/
int cli_print(const string& msg);
/**
* Flush the CLI output.
*
* @return XORP_OK on success, otherwise XORP_ERROR.
*/
int cli_flush();
/**
* Add/remove this client for displaying log messages.
*
* @param v if true, add this client for displaying messages, otherwise
* remove it.
* @return XORP_OK on success, otherwise XORP_ERROR.
*/
int set_log_output(bool v);
/**
* Test if this client has been added for displaying log messages.
*
* @return true if this client has been added for displaying log messages,
* otherwise false.
*/
bool is_log_output() const { return (_is_log_output); }
/**
* Get the file descriptor for reading the input from the user.
*
* @return the file descriptor for reading the input from the user.
*/
XorpFd input_fd() { return (_input_fd); }
/**
* Get the file descriptor for writing the output to the user.
*
* @return the file descriptor for writing the output to the user.
*/
XorpFd output_fd() { return (_output_fd); }
/**
* Test if this client is associated with a terminal type input device.
*
* @return true if this client is associated with a terminal type input
* device, otherwise false.
*/
bool is_input_tty() const;
/**
* Test if this client is associated with a terminal type output device.
*
* @return true if this client is associated with a terminal type output
* device, otherwise false.
*/
bool is_output_tty() const;
/**
* Test if this client is associated with a network connection.
*
* @return true if this client is associated with a network connection,
* otherwise false.
*/
bool is_network() const;
/**
* Set the flag that associates the client with a network connection.
*
* @param v true if this client is associated with a network connection.
*/
void set_network_client(bool v);
/**
* Test if this client is associated with a telnet connection.
*
* @return true if this client is associated with a telnet connection,
* otherwise false.
*/
bool is_telnet() const;
/**
* Test if this client is running in interactive mode.
*
* @return true if this client is running in interactive mode,
* otherwise false.
*/
bool is_interactive() const;
//
// Session info
//
/**
* Get the user name.
*
* @return the user name.
*/
const string& cli_session_user_name() const {
return (_cli_session_user_name);
}
/**
* Get the terminal name.
*
* @return the terminal name.
*/
const string& cli_session_term_name() const {
return (_cli_session_term_name);
}
/*
* Get the user network address.
*
* @return the user network address.
*/
const IPvX& cli_session_from_address() const {
return (_cli_session_from_address);
}
/**
* Get the start time for this connection.
*
* @return a reference to @ref TimeVal with the starting time for
* this connection.
*/
const TimeVal& cli_session_start_time() const {
return (_cli_session_start_time);
}
/**
* Get the stop time for this connection.
*
* @return a reference to @ref TimeVal with the end time for
* this connection.
*/
const TimeVal& cli_session_stop_time() const {
return (_cli_session_stop_time);
}
/**
* Test if the CLI session is active (i.e., it has been setup and ready
* to use).
*
* @return true if the CLI session is active, otherwise false.
*/
bool is_cli_session_active() const {
return (_is_cli_session_active);
}
/**
* Get the session ID.
*
* @return the session ID for this client.
*/
uint32_t cli_session_session_id() const {
return (_cli_session_session_id);
}
/**
* Set the user name.
*
* @param v the user name to set.
*/
void set_cli_session_user_name(const string& v) {
_cli_session_user_name = v;
}
/**
* Set the terminal name.
*
* @param v the terminal name to set.
*/
void set_cli_session_term_name(const string& v) {
_cli_session_term_name = v;
}
/**
* Set the user network address.
*
* @param v the user network address to set.
*/
void set_cli_session_from_address(const IPvX& v) {
_cli_session_from_address = v;
}
/**
* Set the start time for this connection.
*
* @param v the start time for this connection.
*/
void set_cli_session_start_time(const TimeVal& v) {
_cli_session_start_time = v;
}
/**
* Set the stop time for this connection.
*
* @param v the stop time for this connection.
*/
void set_cli_session_stop_time(const TimeVal& v) {
_cli_session_stop_time = v;
}
/**
* Set if this session is active.
*
* @param v if true, the session is set as active, otherwise is
* set as non-active.
*/
void set_is_cli_session_active(bool v) {
_is_cli_session_active = v;
}
/**
* Set the session ID.
*
* @param v the session ID value to set.
*/
void set_cli_session_session_id(uint32_t v) {
_cli_session_session_id = v;
}
/**
* Perform final processing of a command.
*/
void post_process_command();
/**
* Flush the output of a command while it is still running
*/
void flush_process_command_output();
//
// Server communication state
//
/**
* Test if waiting for data from command processor.
*
* @return true if waiting for data from command processor, otherwise
* false.
*/
bool is_waiting_for_data() const { return (_is_waiting_for_data); }
/**
* Set a flag whether is waiting for data from command processor.
*
* @param v if true, the session is set as waiting for data, otherwise
* is set as non-waiting.
*/
void set_is_waiting_for_data(bool v);
/**
* Get the current CLI prompt.
*
* @return the current CLI prompt.
*/
const string& current_cli_prompt() const { return (_current_cli_prompt); }
/**
* Set the current CLI prompt.
*
* @param cli_prompt the current CLI prompt to set.
*/
void set_current_cli_prompt(const string& cli_prompt);
/**
* Update the terminal-related information after it has been resized.
*/
void terminal_resized();
private:
friend class CliPipe;
CliNode& cli_node() { return (_cli_node); }
GetLine *gl() { return (_gl); }
/**
* Process octet that may be part of a telnet option.
*
* @param val the value of the next octet.
* @param is_telnet_option return-by-reference result: if true,
* then @ref val is part of a telnet option and it was processed.
* If it is false, then @ref value should be processed as input data.
* @return XORP_OK on success, otherwise XORP_ERROR.
*/
int process_telnet_option(int val, bool& is_telnet_option);
bool telnet_iac() { return (_telnet_iac); }
void set_telnet_iac(bool v) { _telnet_iac = v; }
bool telnet_sb() { return (_telnet_sb); }
void set_telnet_sb(bool v) {_telnet_sb = v; }
bool telnet_dont() { return (_telnet_dont); }
void set_telnet_dont(bool v) { _telnet_dont = v; }
bool telnet_do() { return (_telnet_do); }
void set_telnet_do(bool v) { _telnet_do = v; }
bool telnet_wont() { return (_telnet_wont); }
void set_telnet_wont(bool v) { _telnet_wont = v; }
bool telnet_will() { return (_telnet_will); }
void set_telnet_will(bool v) { _telnet_will = v; }
bool telnet_binary() { return (_telnet_binary); }
void set_telnet_binary(bool v) { _telnet_binary = v; }
void update_terminal_size();
size_t window_width() { return ((size_t)_window_width); }
void set_window_width(uint16_t v) { _window_width = v; }
size_t window_height() { return ((size_t)_window_height); }
void set_window_height(uint16_t v) { _window_height = v; }
Buffer& command_buffer() { return (_command_buffer); }
Buffer& telnet_sb_buffer() { return (_telnet_sb_buffer); }
CliCommand *cli_command_root() { return (cli_node().cli_command_root());}
int buff_curpos() { return (_buff_curpos); }
void set_buff_curpos(int v) { _buff_curpos = v; }
CliCommand *current_cli_command() { return (_current_cli_command); }
void set_current_cli_command(CliCommand *v);
int process_command(const string& command_line);
void interrupt_command();
CliPipe *add_pipe(const string& pipe_name);
CliPipe *add_pipe(const string& pipe_name,
const list<string>& args_list);
void delete_pipe_all();
bool is_pipe_mode() { return (_is_pipe_mode); }
void set_pipe_mode(bool v) { _is_pipe_mode = v; }
int block_connection(bool is_blocked);
void client_read(XorpFd fd, IoEventType type);
void process_input_data();
void schedule_process_input_data();
static CPL_MATCH_FN(command_completion_func);
int process_char(const string& line, uint8_t val,
bool& stop_processing);
int process_char_page_mode(uint8_t val);
int preprocess_char(uint8_t val, bool& stop_processing);
void command_line_help(const string& line, int word_end,
bool remove_last_input_char);
bool is_multi_command_prefix(const string& command_line);
void process_line_through_pipes(string& pipe_line);
// Output paging related functions
bool is_page_mode() { return (_is_page_mode); }
void set_page_mode(bool v);
bool is_page_buffer_mode() { return (*_is_page_buffer_mode); }
void set_page_buffer_mode(bool v) { *_is_page_buffer_mode = v; }
vector<string>& page_buffer() { return (*_page_buffer); }
const string& page_buffer_line(size_t line_n) const;
void reset_page_buffer() { page_buffer().clear(); set_page_buffer_last_line_n(0); }
size_t page_buffer_lines_n() { return (page_buffer().size()); }
void append_page_buffer_line(const string& buffer_line);
void concat_page_buffer_line(const string& buffer_line, size_t pos);
size_t page_buffer_last_line_n() { return (*_page_buffer_last_line_n); }
void set_page_buffer_last_line_n(size_t v) { *_page_buffer_last_line_n = v; }
void incr_page_buffer_last_line_n() { (*_page_buffer_last_line_n)++; }
void decr_page_buffer_last_line_n() { (*_page_buffer_last_line_n)--; }
size_t page_buffer_window_lines_n();
size_t page_buffer_last_window_line_n();
size_t page_buffer2window_line_n(size_t buffer_line_n);
size_t window_lines_n(size_t buffer_line_n);
size_t calculate_first_page_buffer_line_by_window_size(
size_t last_buffer_line_n,
size_t max_window_size);
bool is_help_mode() { return (_is_help_mode); }
void set_help_mode(bool v) { _is_help_mode = v; }
bool is_nomore_mode() { return (_is_nomore_mode); }
void set_nomore_mode(bool v) { _is_nomore_mode = v; }
bool is_hold_mode() { return (_is_hold_mode); }
void set_hold_mode(bool v) { _is_hold_mode = v; }
bool is_prompt_flushed() const { return _is_prompt_flushed; }
void set_prompt_flushed(bool v) { _is_prompt_flushed = v; }
CliNode& _cli_node; // The CLI node I belong to
XorpFd _input_fd; // File descriptor to read the input
XorpFd _output_fd; // File descriptor to write the output
FILE *_input_fd_file; // The FILE version of _input_fd
FILE *_output_fd_file; // The FILE version of _output_fd
enum ClientType{
CLIENT_MIN = 0,
CLIENT_TERMINAL = 0,
CLIENT_FILE = 1,
CLIENT_MAX
};
ClientType _client_type; // Type of the client: term, file, etc.
GetLine *_gl; // The GetLine for libtecla
bool _telnet_iac; // True if the last octet was IAC
bool _telnet_sb; // True if subnegotiation has began
bool _telnet_dont; // True if the last octet was DONT
bool _telnet_do; // True if the last octet was DO
bool _telnet_wont; // True if the last octet was WONT
bool _telnet_will; // True if the last octet was WILL
bool _telnet_binary; // True if the client "do" binary mode
uint16_t _window_width; // The CLI client window width
uint16_t _window_height; // The CLI client window height
Buffer _command_buffer;
Buffer _telnet_sb_buffer;
// The modified terminal flags
bool _is_modified_stdio_termios_icanon;
bool _is_modified_stdio_termios_echo;
bool _is_modified_stdio_termios_isig;
//
// The original VMIN and VTIME members of the termios.c_cc[] array.
// TODO: those should have type cc_t, but we are using 'int' instead
// to avoid complicated conditional declarations.
//
int _saved_stdio_termios_vmin;
int _saved_stdio_termios_vtime;
// The command we are currently executing and its arguments
CliCommand *_executed_cli_command; // The command currently executed
vector<string> _executed_cli_command_name; // The command name
vector<string> _executed_cli_command_args; // The arguments
CliCommand *_current_cli_command; // The command we have "cd" to
string _current_cli_prompt; // The CLI prompt
int _buff_curpos; // The cursor position in the buffer
string _buffer_line; // To buffer data when pipe-processing
list<CliPipe *> _pipe_list; // A list with the CLI pipe commands
bool _is_pipe_mode; // True if pipe processing enabled
bool _is_nomore_mode; // True if disabled "more" mode
bool _is_hold_mode; // True if enabled "hold" mode
// Output paging related stuff
bool _is_page_mode; // True if the output is paged
bool *_is_page_buffer_mode; // True if enabled page_buffer_mode
vector<string> *_page_buffer;
size_t *_page_buffer_last_line_n;
bool _is_output_buffer_mode; // True if enabled output_buffer_mode
vector<string> _output_buffer; // The output buffer: line per element
size_t _output_buffer_last_line_n; // The current last (visable) line
bool _is_help_buffer_mode; // True if enabled help_buffer_mode
vector<string> _help_buffer; // The help buffer: line per element
size_t _help_buffer_last_line_n; // The current last (visable) line
bool _is_help_mode; // True if enabled help mode
bool _is_prompt_flushed; // True if we have flushed the prompt
// The strings to save the action names that some keys were bind to
string _action_name_up_arrow;
string _action_name_down_arrow;
string _action_name_tab;
string _action_name_newline_n;
string _action_name_newline_r;
string _action_name_spacebar;
string _action_name_ctrl_a;
string _action_name_ctrl_b;
string _action_name_ctrl_c;
string _action_name_ctrl_d;
string _action_name_ctrl_e;
string _action_name_ctrl_f;
string _action_name_ctrl_h;
string _action_name_ctrl_k;
string _action_name_ctrl_l;
string _action_name_ctrl_m;
string _action_name_ctrl_n;
string _action_name_ctrl_p;
string _action_name_ctrl_u;
string _action_name_ctrl_x;
//
// Session info state
//
string _cli_session_user_name;
string _cli_session_term_name;
IPvX _cli_session_from_address;
TimeVal _cli_session_start_time;
TimeVal _cli_session_stop_time;
bool _is_cli_session_active;
uint32_t _cli_session_session_id; // The unique session ID.
bool _is_network;
//
// Log-related state
//
bool _is_log_output;
//
// Server communication state
//
bool _is_waiting_for_data; // True if waiting for external data
//
// Misc state
//
vector<uint8_t> _pending_input_data;
XorpTimer _process_pending_input_data_timer;
};
//
// Global variables
//
//
// Global functions prototypes
//
#endif // __CLI_CLI_CLIENT_HH__
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