1 /*****************************************************************************
2 * netutils.c: various network functions
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VideoLAN
5 * $Id: netutils.c,v 1.68 2002/06/01 18:04:49 sam Exp $
7 * Authors: Vincent Seguin <seguin@via.ecp.fr>
8 * Benoit Steiner <benny@via.ecp.fr>
9 * Henri Fallon <henri@videolan.org>
10 * Xavier Marchesini <xav@alarue.net>
11 * Christophe Massiot <massiot@via.ecp.fr>
12 * Samuel Hocevar <sam@via.ecp.fr>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
27 *****************************************************************************/
29 /*****************************************************************************
31 *****************************************************************************/
32 #include <stdlib.h> /* free(), realloc(), atoi() */
33 #include <errno.h> /* errno() */
34 #include <string.h> /* memset() */
39 # include <unistd.h> /* gethostname() */
40 #elif defined( _MSC_VER ) && defined( _WIN32 )
44 #if !defined( _MSC_VER )
45 #include <sys/time.h> /* gettimeofday */
49 # include <winsock2.h>
51 # include <netdb.h> /* hostent ... */
52 # include <sys/socket.h> /* BSD: struct sockaddr */
53 # include <netinet/in.h> /* BSD: struct in_addr */
54 # ifdef HAVE_ARPA_INET_H
55 # include <arpa/inet.h> /* inet_ntoa(), inet_aton() */
60 #include <sys/ioctl.h> /* ioctl() */
63 #if defined( WIN32 ) /* tools to get the MAC adress from */
64 #include <windows.h> /* the interface under Windows */
70 #include <net/if.h> /* interface (arch-dependent) */
73 #ifdef HAVE_SYS_SOCKIO_H
74 #include <sys/sockio.h>
81 /*****************************************************************************
82 * input_channel_t: channel library data
83 *****************************************************************************
84 * Store global channel library data.
85 * The part of the code concerning the channel changing process is unstable
86 * as it depends on the VideoLAN channel server, which isn't frozen for
88 *****************************************************************************/
89 struct input_channel_s
91 int i_channel; /* current channel number */
92 mtime_t last_change; /* last change date */
95 /*****************************************************************************
97 *****************************************************************************/
98 static int GetMacAddress ( vlc_object_t *, int i_fd, char *psz_mac );
100 static int GetAdapterInfo ( int i_adapter, char *psz_string );
103 /*****************************************************************************
104 * network_ChannelCreate: initialize global channel method data
105 *****************************************************************************
106 * Initialize channel input method global data. This function should be called
107 * once before any input thread is created or any call to other
108 * input_Channel*() function is attempted.
109 *****************************************************************************/
110 int __network_ChannelCreate( vlc_object_t *p_this )
112 #if !defined( SYS_LINUX ) && !defined( WIN32 )
113 msg_Err( p_this, "VLAN-based channels are not supported "
114 "on this architecture" );
117 /* Allocate structure */
118 p_this->p_vlc->p_channel = malloc( sizeof( input_channel_t ) );
119 if( p_this->p_vlc->p_channel == NULL )
121 msg_Err( p_this, "out of memory" );
125 /* Initialize structure */
126 p_this->p_vlc->p_channel->i_channel = 0;
127 p_this->p_vlc->p_channel->last_change = 0;
129 msg_Dbg( p_this, "channels initialized" );
133 /*****************************************************************************
134 * network_ChannelJoin: join a channel
135 *****************************************************************************
136 * This function will try to join a channel. If the relevant interface is
137 * already on the good channel, nothing will be done. Else, and if possible
138 * (if the interface is not locked), the channel server will be contacted
139 * and a change will be requested. The function will block until the change
140 * is effective. Note that once a channel is no more used, its interface
141 * should be unlocked using input_ChannelLeave().
142 * Non 0 will be returned in case of error.
143 *****************************************************************************/
144 int __network_ChannelJoin( vlc_object_t *p_this, int i_channel )
146 #define VLCS_VERSION 13
147 #define MESSAGE_LENGTH 256
149 module_t * p_network;
150 char * psz_network = NULL;
151 network_socket_t socket_desc;
152 char psz_mess[ MESSAGE_LENGTH ];
156 struct timeval delay;
159 if( !config_GetInt( p_this, "network-channel" ) )
161 msg_Err( p_this, "channels disabled, to enable them, use the"
162 " --channels option" );
166 /* If last change is too recent, wait a while */
167 // if( mdate() - p_this->p_vlc->p_channel->last_change
168 // < INPUT_CHANNEL_CHANGE_DELAY )
170 // msg_Warn( p_this, "waiting before changing channel" );
171 /* XXX Isn't this completely brain-damaged ??? -- Sam */
172 /* Yes it is. I don't think this is still justified with the new
173 * vlanserver --Meuuh */
174 // mwait( p_this->p_vlc->p_channel->last_change
175 // + INPUT_CHANNEL_CHANGE_DELAY );
178 if( config_GetInt( p_this, "ipv4" ) )
180 psz_network = "ipv4";
182 if( config_GetInt( p_this, "ipv6" ) )
184 psz_network = "ipv6";
187 /* Getting information about the channel server */
188 if( !(psz_vlcs = config_GetPsz( p_this, "channel-server" )) )
190 msg_Err( p_this, "configuration variable channel-server empty" );
194 i_port = config_GetInt( p_this, "channel-port" );
196 msg_Dbg( p_this, "connecting to %s:%d", psz_vlcs, i_port );
198 /* Prepare the network_socket_t structure */
199 socket_desc.i_type = NETWORK_UDP;
200 socket_desc.psz_bind_addr = "";
201 socket_desc.i_bind_port = 4321;
202 socket_desc.psz_server_addr = psz_vlcs;
203 socket_desc.i_server_port = i_port;
205 /* Find an appropriate network module */
206 p_network = module_Need( p_this, MODULE_CAPABILITY_NETWORK, psz_network,
208 if( p_network == NULL )
212 module_Unneed( p_network );
214 free( psz_vlcs ); /* Do we really need this ? -- Meuuh */
215 i_fd = socket_desc.i_handle;
217 /* Look for the interface MAC address */
218 if( GetMacAddress( p_this, i_fd, psz_mac ) )
220 msg_Err( p_this, "failed getting MAC address" );
225 msg_Dbg( p_this, "MAC address is %s", psz_mac );
227 /* Build the message */
228 sprintf( psz_mess, "%d %u %lu %s \n", i_channel, VLCS_VERSION,
229 (unsigned long)(mdate() / (u64)1000000),
232 /* Send the message */
233 send( i_fd, psz_mess, MESSAGE_LENGTH, 0 );
235 msg_Dbg( p_this, "attempting to join channel %d", i_channel );
237 /* We have changed channels ! (or at least, we tried) */
238 p_this->p_vlc->p_channel->last_change = mdate();
239 p_this->p_vlc->p_channel->i_channel = i_channel;
241 /* Wait 5 sec for an answer from the server */
245 FD_SET( i_fd, &fds );
247 switch( select( i_fd + 1, &fds, NULL, NULL, &delay ) )
250 msg_Err( p_this, "no answer from vlcs" );
255 msg_Err( p_this, "error while listening to vlcs" );
260 recv( i_fd, psz_mess, MESSAGE_LENGTH, 0 );
261 psz_mess[ MESSAGE_LENGTH - 1 ] = '\0';
263 if( !strncasecmp( psz_mess, "E:", 2 ) )
265 msg_Err( p_this, "vlcs said '%s'", psz_mess + 2 );
269 else if( !strncasecmp( psz_mess, "I:", 2 ) )
271 msg_Dbg( p_this, "vlcs said '%s'", psz_mess + 2 );
273 else /* We got something to play ! FIXME: not very nice */
276 # define p_item (&p_this->p_vlc->p_playlist->p_item \
277 [ p_this->p_vlc->p_playlist->i_index + 1])
278 vlc_mutex_lock( &p_this->p_vlc->p_playlist->change_lock );
281 free( p_item->psz_name );
282 p_item->psz_name = strdup( psz_mess );
283 /* Unlock _afterwards_ */
284 vlc_mutex_unlock( &p_this->p_vlc->p_playlist->change_lock );
288 /* Unlock _before_ */
289 vlc_mutex_unlock( &p_this->p_vlc->p_playlist->change_lock );
290 intf_PlaylistAdd( p_this->p_vlc->p_playlist, 0, psz_mess );
295 /* Close the socket and return nicely */
305 /* Following functions are local */
307 /*****************************************************************************
308 * GetMacAddress: extract the MAC Address
309 *****************************************************************************/
310 static int GetMacAddress( vlc_object_t *p_this, int i_fd, char *psz_mac )
312 #if defined( SYS_LINUX )
313 struct ifreq interface;
318 * Looking for information about the eth0 interface
320 interface.ifr_addr.sa_family = AF_INET;
321 if( !(psz_interface = config_GetPsz( p_this, "iface" )) )
323 msg_Err( p_this, "configuration variable iface empty" );
326 strcpy( interface.ifr_name, psz_interface );
327 free( psz_interface );
329 i_ret = ioctl( i_fd, SIOCGIFHWADDR, &interface );
333 msg_Err( p_this, "ioctl SIOCGIFHWADDR failed" );
337 sprintf( psz_mac, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
338 interface.ifr_hwaddr.sa_data[0] & 0xff,
339 interface.ifr_hwaddr.sa_data[1] & 0xff,
340 interface.ifr_hwaddr.sa_data[2] & 0xff,
341 interface.ifr_hwaddr.sa_data[3] & 0xff,
342 interface.ifr_hwaddr.sa_data[4] & 0xff,
343 interface.ifr_hwaddr.sa_data[5] & 0xff );
347 #elif defined( WIN32 )
350 /* Get adapter list - support for more than one adapter */
351 LANA_ENUM AdapterList;
354 msg_Dbg( p_this, "looking for MAC address" );
356 memset( &Ncb, 0, sizeof( NCB ) );
357 Ncb.ncb_command = NCBENUM;
358 Ncb.ncb_buffer = (unsigned char *)&AdapterList;
359 Ncb.ncb_length = sizeof( AdapterList );
362 /* Get all of the local ethernet addresses */
363 for ( i = 0; i < AdapterList.length ; ++i )
365 if ( GetAdapterInfo ( AdapterList.lana[ i ], psz_mac ) == 0 )
374 strcpy( psz_mac, "00:00:00:00:00:00" );
381 /*****************************************************************************
382 * GetAdapterInfo : gets some informations about the interface using NETBIOS
383 *****************************************************************************/
384 static int GetAdapterInfo( int i_adapter, char *psz_string )
388 ADAPTER_STATUS adapt;
389 NAME_BUFFER psz_name[30];
392 /* Reset the LAN adapter so that we can begin querying it */
394 memset( &Ncb, 0, sizeof ( Ncb ) );
395 Ncb.ncb_command = NCBRESET;
396 Ncb.ncb_lana_num = i_adapter;
398 if( Netbios( &Ncb ) != NRC_GOODRET )
400 //X intf_ErrMsg( "network error: reset returned %i", Ncb.ncb_retcode );
404 /* Prepare to get the adapter status block */
405 memset( &Ncb, 0, sizeof( Ncb ) ) ; /* Initialization */
406 Ncb.ncb_command = NCBASTAT;
407 Ncb.ncb_lana_num = i_adapter;
409 strcpy( (char *)Ncb.ncb_callname, "*" );
411 memset( &Adapter, 0, sizeof ( Adapter ) );
412 Ncb.ncb_buffer = ( unsigned char * ) &Adapter;
413 Ncb.ncb_length = sizeof ( Adapter );
415 /* Get the adapter's info and, if this works, return it in standard,
416 * colon-delimited form. */
417 if ( Netbios( &Ncb ) == 0 )
419 sprintf ( psz_string, "%02X:%02X:%02X:%02X:%02X:%02X",
420 (int) ( Adapter.adapt.adapter_address[0] ),
421 (int) ( Adapter.adapt.adapter_address[1] ),
422 (int) ( Adapter.adapt.adapter_address[2] ),
423 (int) ( Adapter.adapt.adapter_address[3] ),
424 (int) ( Adapter.adapt.adapter_address[4] ),
425 (int) ( Adapter.adapt.adapter_address[5] ) );
427 //X intf_WarnMsg( 2, "network: found MAC address %s", psz_string );
433 //X intf_ErrMsg( "network error: ASTAT returned %i", Ncb.ncb_retcode );