1 /*****************************************************************************
2 * telnet.c: VLM interface plugin
3 *****************************************************************************
4 * Copyright (C) 2000-2006 the VideoLAN team
7 * Authors: Simon Latapie <garf@videolan.org>
8 * Laurent Aimar <fenrir@videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
28 #include <stdlib.h> /* malloc(), free() */
33 #include <vlc/input.h>
40 #ifdef HAVE_SYS_TIME_H
41 # include <sys/time.h>
53 #define READ_MODE_PWD 1
54 #define READ_MODE_CMD 2
55 #define WRITE_MODE_PWD 3 // when we write the word "Password:"
56 #define WRITE_MODE_CMD 4
66 /*****************************************************************************
68 *****************************************************************************/
69 static int Open ( vlc_object_t * );
70 static void Close( vlc_object_t * );
72 #define TELNETHOST_TEXT N_( "Host" )
73 #define TELNETHOST_LONGTEXT N_( "This is the host on which the " \
74 "interface will listen. It defaults to all network interfaces (0.0.0.0)." \
75 " If you want this interface to be available only on the local " \
76 "machine, enter \"127.0.0.1\"." )
77 #define TELNETPORT_TEXT N_( "Port" )
78 #define TELNETPORT_LONGTEXT N_( "This is the TCP port on which this " \
79 "interface will listen. It defaults to 4212." )
80 #define TELNETPORT_DEFAULT 4212
81 #define TELNETPWD_TEXT N_( "Password" )
82 #define TELNETPWD_LONGTEXT N_( "A single administration password is used " \
83 "to protect this interface. The default value is \"admin\"." )
84 #define TELNETPWD_DEFAULT "admin"
87 set_shortname( "Telnet" );
88 set_category( CAT_INTERFACE );
89 set_subcategory( SUBCAT_INTERFACE_CONTROL );
90 add_string( "telnet-host", "", NULL, TELNETHOST_TEXT,
91 TELNETHOST_LONGTEXT, VLC_TRUE );
92 add_integer( "telnet-port", TELNETPORT_DEFAULT, NULL, TELNETPORT_TEXT,
93 TELNETPORT_LONGTEXT, VLC_TRUE );
94 add_string( "telnet-password", TELNETPWD_DEFAULT, NULL, TELNETPWD_TEXT,
95 TELNETPWD_LONGTEXT, VLC_TRUE );
96 set_description( _("VLM remote control interface") );
97 add_category_hint( "VLM", NULL, VLC_FALSE );
98 set_capability( "interface", 0 );
99 set_callbacks( Open , Close );
102 /*****************************************************************************
104 *****************************************************************************/
105 static void Run( intf_thread_t * );
109 int i_mode; /* read or write */
111 char buffer_read[1000]; // 1000 byte per command should be sufficient
114 char *p_buffer_write; // the position in the buffer
115 int i_buffer_write; // the number of byte we still have to send
116 int i_tel_cmd; // for specific telnet commands
120 static char *MessageToString( vlm_message_t *, int );
121 static void Write_message( telnet_client_t *, vlm_message_t *, char *, int );
125 telnet_client_t **clients;
132 * getPort: Decide which port to use. There are two possibilities to
133 * specify a port: integrated in the --telnet-host option with :PORT
134 * or using the --telnet-port option. The --telnet-port option has
136 * This code relies upon the fact the url.i_port is 0 if the :PORT
137 * option is missing from --telnet-host.
139 static int getPort(intf_thread_t *p_intf, vlc_url_t url, int i_port)
141 // Print error if two different ports have been specified
142 if (url.i_port != 0 &&
143 i_port != TELNETPORT_DEFAULT &&
144 url.i_port != i_port )
146 msg_Err( p_intf, "ignoring port %d and using %d", url.i_port,
149 if (i_port != TELNETPORT_DEFAULT)
160 /*****************************************************************************
161 * Open: initialize dummy interface
162 *****************************************************************************/
163 static int Open( vlc_object_t *p_this )
165 intf_thread_t *p_intf = (intf_thread_t*) p_this;
171 if( !(mediatheque = vlm_New( p_intf )) )
173 msg_Err( p_intf, "cannot start VLM" );
177 msg_Info( p_intf, "using the VLM interface plugin..." );
179 i_telnetport = config_GetInt( p_intf, "telnet-port" );
180 psz_address = config_GetPsz( p_intf, "telnet-host" );
182 vlc_UrlParse(&url, psz_address, 0);
184 // There might be two ports given, resolve any potentially
186 url.i_port = getPort(p_intf, url, i_telnetport);
188 p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
189 if( ( p_intf->p_sys->pi_fd = net_ListenTCP( p_intf, url.psz_host, url.i_port ) )
192 msg_Err( p_intf, "cannot listen for telnet" );
195 free( p_intf->p_sys );
199 "telnet interface started on interface %s %d",
200 url.psz_host, url.i_port );
202 p_intf->p_sys->i_clients = 0;
203 p_intf->p_sys->clients = NULL;
204 p_intf->p_sys->mediatheque = mediatheque;
205 p_intf->pf_run = Run;
212 /*****************************************************************************
214 *****************************************************************************/
215 static void Close( vlc_object_t *p_this )
217 intf_thread_t *p_intf = (intf_thread_t*)p_this;
218 intf_sys_t *p_sys = p_intf->p_sys;
221 for( i = 0; i < p_sys->i_clients; i++ )
223 telnet_client_t *cl = p_sys->clients[i];
228 if( p_sys->clients != NULL ) free( p_sys->clients );
230 net_ListenClose( p_sys->pi_fd );
232 vlm_Delete( p_sys->mediatheque );
237 /*****************************************************************************
239 *****************************************************************************/
240 static void Run( intf_thread_t *p_intf )
242 intf_sys_t *p_sys = p_intf->p_sys;
243 struct timeval timeout;
246 psz_password = config_GetPsz( p_intf, "telnet-password" );
248 while( !p_intf->b_die )
250 fd_set fds_read, fds_write;
251 int i_handle_max = 0;
252 int i_ret, i_len, fd, i;
254 /* if a new client wants to communicate */
255 fd = net_Accept( p_intf, p_sys->pi_fd, p_sys->i_clients > 0 ? 0 : -1 );
260 /* to be non blocking */
261 #if defined( WIN32 ) || defined( UNDER_CE )
263 unsigned long i_dummy = 1;
264 ioctlsocket( fd, FIONBIO, &i_dummy );
267 fcntl( fd, F_SETFL, O_NONBLOCK );
269 cl = malloc( sizeof( telnet_client_t ));
272 cl->buffer_write = NULL;
273 cl->p_buffer_write = cl->buffer_write;
274 Write_message( cl, NULL, "Password: \xff\xfb\x01", WRITE_MODE_PWD );
276 TAB_APPEND( p_sys->i_clients, p_sys->clients, cl );
279 /* to do a proper select */
280 FD_ZERO( &fds_read );
281 FD_ZERO( &fds_write );
283 for( i = 0 ; i < p_sys->i_clients ; i++ )
285 telnet_client_t *cl = p_sys->clients[i];
287 if( cl->i_mode == WRITE_MODE_PWD || cl->i_mode == WRITE_MODE_CMD )
289 FD_SET( cl->fd , &fds_write );
293 FD_SET( cl->fd , &fds_read );
295 i_handle_max = __MAX( i_handle_max, cl->fd );
299 timeout.tv_usec = 500*1000;
301 i_ret = select( i_handle_max + 1, &fds_read, &fds_write, 0, &timeout );
302 if( i_ret == -1 && errno != EINTR )
304 msg_Warn( p_intf, "cannot select sockets" );
308 else if( i_ret <= 0 )
313 /* check if there is something to do with the socket */
314 for( i = 0 ; i < p_sys->i_clients ; i++ )
316 telnet_client_t *cl = p_sys->clients[i];
318 if( FD_ISSET(cl->fd , &fds_write) && cl->i_buffer_write > 0 )
320 i_len = send( cl->fd , cl->p_buffer_write ,
321 cl->i_buffer_write , 0 );
324 cl->p_buffer_write += i_len;
325 cl->i_buffer_write -= i_len;
328 else if( FD_ISSET( cl->fd, &fds_read) )
333 while( (i_recv=recv( cl->fd, cl->p_buffer_read, 1, 0 )) > 0 &&
334 cl->p_buffer_read - cl->buffer_read < 999 )
336 switch( cl->i_tel_cmd )
339 switch( *(uint8_t *)cl->p_buffer_read )
344 *cl->p_buffer_read = '\n';
347 case TEL_IAC: // telnet specific command
357 switch( *(uint8_t *)cl->p_buffer_read )
359 case TEL_WILL: case TEL_WONT:
360 case TEL_DO: case TEL_DONT:
372 cl->p_buffer_read -= 2;
376 if( i_end != 0 ) break;
379 if( cl->p_buffer_read - cl->buffer_read == 999 )
381 Write_message( cl, NULL, "Line too long\r\n",
388 TAB_REMOVE( p_intf->p_sys->i_clients ,
389 p_intf->p_sys->clients , cl );
395 /* and now we should bidouille the data we received / send */
396 for( i = 0 ; i < p_sys->i_clients ; i++ )
398 telnet_client_t *cl = p_sys->clients[i];
400 if( cl->i_mode >= WRITE_MODE_PWD && cl->i_buffer_write == 0 )
402 // we have finished to send
403 cl->i_mode -= 2; // corresponding READ MODE
405 else if( cl->i_mode == READ_MODE_PWD &&
406 *cl->p_buffer_read == '\n' )
408 *cl->p_buffer_read = '\0';
409 if( strcmp( psz_password, cl->buffer_read ) == 0 )
411 Write_message( cl, NULL, "\xff\xfc\x01\r\nWelcome, "
412 "Master\r\n> ", WRITE_MODE_CMD );
417 Write_message( cl, NULL,
418 "\r\nWrong password.\r\nPassword: ",
422 else if( cl->i_mode == READ_MODE_CMD &&
423 *cl->p_buffer_read == '\n' )
425 /* ok, here is a command line */
426 if( !strncmp( cl->buffer_read, "logout", 6 ) ||
427 !strncmp( cl->buffer_read, "quit", 4 ) ||
428 !strncmp( cl->buffer_read, "exit", 4 ) )
431 TAB_REMOVE( p_intf->p_sys->i_clients ,
432 p_intf->p_sys->clients , cl );
435 else if( !strncmp( cl->buffer_read, "shutdown", 8 ) )
437 msg_Err( p_intf, "shutdown requested" );
438 p_intf->p_libvlc->b_die = VLC_TRUE;
442 vlm_message_t *message;
444 /* create a standard string */
445 *cl->p_buffer_read = '\0';
447 vlm_ExecuteCommand( p_sys->mediatheque, cl->buffer_read,
449 Write_message( cl, message, NULL, WRITE_MODE_CMD );
450 vlm_MessageDelete( message );
457 static void Write_message( telnet_client_t *client, vlm_message_t *message,
458 char *string_message, int i_mode )
462 client->p_buffer_read = client->buffer_read;
463 (client->p_buffer_read)[0] = 0; // if (cl->p_buffer_read)[0] = '\n'
464 if( client->buffer_write ) free( client->buffer_write );
466 /* generate the psz_message string */
469 /* ok, look for vlm_message_t */
470 psz_message = MessageToString( message, 0 );
474 /* it is a basic string_message */
475 psz_message = strdup( string_message );
478 client->buffer_write = client->p_buffer_write = psz_message;
479 client->i_buffer_write = strlen( psz_message );
480 client->i_mode = i_mode;
483 /* We need the level of the message to put a beautiful indentation.
484 * first level is 0 */
485 static char *MessageToString( vlm_message_t *message, int i_level )
487 #define STRING_CR "\r\n"
488 #define STRING_TAIL "> "
491 int i, i_message = sizeof( STRING_TAIL );
493 if( !message || !message->psz_name )
495 return strdup( STRING_CR STRING_TAIL );
497 else if( !i_level && !message->i_child && !message->psz_value )
499 /* A command is successful. Don't write anything */
500 return strdup( /*STRING_CR*/ STRING_TAIL );
503 i_message += strlen( message->psz_name ) + i_level * sizeof( " " ) + 1;
504 psz_message = malloc( i_message );
506 for( i = 0; i < i_level; i++ ) strcat( psz_message, " " );
507 strcat( psz_message, message->psz_name );
509 if( message->psz_value )
511 i_message += sizeof( " : " ) + strlen( message->psz_value ) +
513 psz_message = realloc( psz_message, i_message );
514 strcat( psz_message, " : " );
515 strcat( psz_message, message->psz_value );
516 strcat( psz_message, STRING_CR );
520 i_message += sizeof( STRING_CR );
521 psz_message = realloc( psz_message, i_message );
522 strcat( psz_message, STRING_CR );
525 for( i = 0; i < message->i_child; i++ )
527 char *child_message =
528 MessageToString( message->child[i], i_level + 1 );
530 i_message += strlen( child_message );
531 psz_message = realloc( psz_message, i_message );
532 strcat( psz_message, child_message );
533 free( child_message );
536 if( i_level == 0 ) strcat( psz_message, STRING_TAIL );