256 lines
7.1 KiB
C
256 lines
7.1 KiB
C
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is libguac-client-ssh.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Michael Jumper.
|
|
* Portions created by the Initial Developer are Copyright (C) 2011
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <guacamole/log.h>
|
|
|
|
#include "ssh_terminal.h"
|
|
#include "ssh_terminal_handlers.h"
|
|
|
|
int ssh_guac_terminal_echo(ssh_guac_terminal* term, char c) {
|
|
|
|
/* Wrap if necessary */
|
|
if (term->cursor_col >= term->term_width) {
|
|
term->cursor_col = 0;
|
|
term->cursor_row++;
|
|
}
|
|
|
|
/* Scroll up if necessary */
|
|
if (term->cursor_row >= term->term_height) {
|
|
term->cursor_row = term->term_height - 1;
|
|
|
|
/* Scroll up by one row */
|
|
ssh_guac_terminal_scroll_up(term, 0, term->term_height - 1, 1);
|
|
|
|
}
|
|
|
|
switch (c) {
|
|
|
|
/* Bell */
|
|
case 0x07:
|
|
break;
|
|
|
|
/* Backspace */
|
|
case 0x08:
|
|
if (term->cursor_col >= 1)
|
|
term->cursor_col--;
|
|
break;
|
|
|
|
/* Carriage return */
|
|
case '\r':
|
|
term->cursor_col = 0;
|
|
break;
|
|
|
|
/* Line feed */
|
|
case '\n':
|
|
term->cursor_row++;
|
|
break;
|
|
|
|
/* ESC */
|
|
case 0x1B:
|
|
term->char_handler = ssh_guac_terminal_escape;
|
|
break;
|
|
|
|
/* Displayable chars */
|
|
default:
|
|
ssh_guac_terminal_send_glyph(term,
|
|
term->cursor_row,
|
|
term->cursor_col,
|
|
c);
|
|
|
|
/* Advance cursor */
|
|
term->cursor_col++;
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
int ssh_guac_terminal_escape(ssh_guac_terminal* term, char c) {
|
|
|
|
switch (c) {
|
|
|
|
case '(':
|
|
term->char_handler = ssh_guac_terminal_charset;
|
|
break;
|
|
|
|
case ']':
|
|
term->char_handler = ssh_guac_terminal_osc;
|
|
break;
|
|
|
|
case '[':
|
|
term->char_handler = ssh_guac_terminal_csi;
|
|
break;
|
|
|
|
default:
|
|
guac_log_info("Unhandled ESC sequence: %c", c);
|
|
term->char_handler = ssh_guac_terminal_echo;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
int ssh_guac_terminal_charset(ssh_guac_terminal* term, char c) {
|
|
term->char_handler = ssh_guac_terminal_echo;
|
|
return 0;
|
|
}
|
|
|
|
int ssh_guac_terminal_csi(ssh_guac_terminal* term, char c) {
|
|
|
|
/* CSI function arguments */
|
|
static int argc = 0;
|
|
static int argv[16];
|
|
|
|
/* Argument building counter and buffer */
|
|
static int argv_length = 0;
|
|
static char argv_buffer[256];
|
|
|
|
/* FIXME: "The sequence of parameters may be preceded by a single question mark. */
|
|
if (c == '?')
|
|
return 0;
|
|
|
|
/* Digits get concatenated into argv */
|
|
if (c >= '0' && c <= '9') {
|
|
|
|
/* Concatenate digit if there is space in buffer */
|
|
if (argv_length < sizeof(argv_buffer)-1)
|
|
argv_buffer[argv_length++] = c;
|
|
|
|
}
|
|
|
|
/* Any non-digit stops the parameter, and possibly the sequence */
|
|
else {
|
|
|
|
/* At most 16 parameters */
|
|
if (argc < 16) {
|
|
|
|
/* Finish parameter */
|
|
argv_buffer[argv_length] = 0;
|
|
argv[argc++] = atoi(argv_buffer);
|
|
|
|
/* Prepare for next parameter */
|
|
argv_length = 0;
|
|
|
|
}
|
|
|
|
/* Handle CSI functions */
|
|
switch (c) {
|
|
|
|
/* H: Move cursor */
|
|
case 'H':
|
|
term->cursor_row = argv[0] - 1;
|
|
term->cursor_col = argv[1] - 1;
|
|
break;
|
|
|
|
/* J: Erase display */
|
|
case 'J':
|
|
|
|
/* Erase from cursor to end of display */
|
|
if (argv[0] == 0)
|
|
ssh_guac_terminal_clear_range(term,
|
|
term->cursor_row, term->cursor_col,
|
|
term->term_height-1, term->term_width-1);
|
|
|
|
/* Erase from start to cursor */
|
|
else if (argv[0] == 1)
|
|
ssh_guac_terminal_clear_range(term,
|
|
0, 0,
|
|
term->cursor_row, term->cursor_col);
|
|
|
|
/* Entire screen */
|
|
else if (argv[0] == 2)
|
|
ssh_guac_terminal_clear(term,
|
|
0, 0, term->term_height, term->term_width);
|
|
|
|
break;
|
|
|
|
/* K: Erase line */
|
|
case 'K':
|
|
|
|
/* Erase from cursor to end of line */
|
|
if (argv[0] == 0)
|
|
ssh_guac_terminal_clear(term,
|
|
term->cursor_row, term->cursor_col,
|
|
1, term->term_width - term->cursor_col);
|
|
|
|
/* Erase from start to cursor */
|
|
else if (argv[0] == 1)
|
|
ssh_guac_terminal_clear(term,
|
|
term->cursor_row, 0,
|
|
1, term->cursor_col + 1);
|
|
|
|
/* Erase line */
|
|
else if (argv[0] == 2)
|
|
ssh_guac_terminal_clear(term,
|
|
term->cursor_row, 0,
|
|
1, term->term_width);
|
|
|
|
break;
|
|
|
|
/* Warn of unhandled codes */
|
|
default:
|
|
if (c != ';')
|
|
guac_log_info("Unhandled CSI sequence: %c", c);
|
|
|
|
}
|
|
|
|
/* If not a semicolon, end of CSI sequence */
|
|
if (c != ';') {
|
|
term->char_handler = ssh_guac_terminal_echo;
|
|
|
|
/* Reset argument counters */
|
|
argc = 0;
|
|
argv_length = 0;
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
int ssh_guac_terminal_osc(ssh_guac_terminal* term, char c) {
|
|
/* TODO: Implement OSC */
|
|
if (c == 0x9C || c == 0x5C || c == 0x07) /* ECMA-48 ST (String Terminator */
|
|
term->char_handler = ssh_guac_terminal_echo;
|
|
return 0;
|
|
}
|
|
|