1 /*****************************************************************************
2 * netutils.c: various network functions
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VideoLAN
5 * $Id: netutils.c,v 1.61 2002/03/19 00:30:44 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@via.ecp.fr>
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() */
36 #include <videolan/vlc.h>
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>
79 #include "intf_playlist.h"
82 /*****************************************************************************
83 * input_channel_t: channel library data
84 *****************************************************************************
85 * Store global channel library data.
86 * The part of the code concerning the channel changing process is unstable
87 * as it depends on the VideoLAN channel server, which isn't frozen for
89 *****************************************************************************/
90 typedef struct input_channel_s
92 int i_channel; /* current channel number */
93 mtime_t last_change; /* last change date */
96 /*****************************************************************************
98 *****************************************************************************/
99 static int GetMacAddress ( int i_fd, char *psz_mac );
101 static int GetAdapterInfo ( int i_adapter, char *psz_string );
104 /*****************************************************************************
105 * network_ChannelCreate: initialize global channel method data
106 *****************************************************************************
107 * Initialize channel input method global data. This function should be called
108 * once before any input thread is created or any call to other
109 * input_Channel*() function is attempted.
110 *****************************************************************************/
111 int network_ChannelCreate( void )
113 #if !defined( SYS_LINUX ) && !defined( WIN32 )
114 intf_ErrMsg( "channel warning: VLAN-based channels are not supported"
115 " under this architecture" );
118 /* Allocate structure */
119 p_main->p_channel = malloc( sizeof( input_channel_t ) );
120 if( p_main->p_channel == NULL )
122 intf_ErrMsg( "network error: could not create channel bank" );
126 /* Initialize structure */
127 p_main->p_channel->i_channel = 0;
128 p_main->p_channel->last_change = 0;
130 intf_WarnMsg( 2, "network: channels initialized" );
134 /*****************************************************************************
135 * network_ChannelJoin: join a channel
136 *****************************************************************************
137 * This function will try to join a channel. If the relevant interface is
138 * already on the good channel, nothing will be done. Else, and if possible
139 * (if the interface is not locked), the channel server will be contacted
140 * and a change will be requested. The function will block until the change
141 * is effective. Note that once a channel is no more used, its interface
142 * should be unlocked using input_ChannelLeave().
143 * Non 0 will be returned in case of error.
144 *****************************************************************************/
145 int network_ChannelJoin( int i_channel )
147 #define VLCS_VERSION 13
148 #define MESSAGE_LENGTH 256
150 struct module_s * p_network;
151 char * psz_network = NULL;
152 network_socket_t socket_desc;
153 char psz_mess[ MESSAGE_LENGTH ];
157 struct timeval delay;
160 if( !config_GetIntVariable( "network_channel" ) )
162 intf_ErrMsg( "network: channels disabled, to enable them, use the"
163 "--channels option" );
167 /* If last change is too recent, wait a while */
168 if( mdate() - p_main->p_channel->last_change < INPUT_CHANNEL_CHANGE_DELAY )
170 intf_WarnMsg( 2, "network: 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_main->p_channel->last_change + INPUT_CHANNEL_CHANGE_DELAY );
177 if( config_GetIntVariable( "ipv4" ) )
179 psz_network = "ipv4";
181 if( config_GetIntVariable( "ipv6" ) )
183 psz_network = "ipv6";
186 /* Getting information about the channel server */
187 if( !(psz_vlcs = config_GetPszVariable( "channel_server" )) )
189 intf_ErrMsg( "network: configuration variable channel_server empty" );
193 i_port = config_GetIntVariable( "channel_port" );
195 intf_WarnMsg( 5, "channel: connecting to %s:%d",
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( 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( i_fd, psz_mac ) )
220 intf_ErrMsg( "network error: failed getting MAC address" );
225 intf_WarnMsg( 6, "network: 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 intf_WarnMsg( 2, "network: attempting to join channel %d", i_channel );
237 /* We have changed channels ! (or at least, we tried) */
238 p_main->p_channel->last_change = mdate();
239 p_main->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 intf_ErrMsg( "network error: no answer from vlcs" );
256 intf_ErrMsg( "network error: error while listening to vlcs" );
262 recv( i_fd, psz_mess, MESSAGE_LENGTH, 0 );
263 psz_mess[ MESSAGE_LENGTH - 1 ] = '\0';
265 if( !strncasecmp( psz_mess, "E: ", 3 ) )
267 intf_ErrMsg( "network error: vlcs said '%s'", psz_mess + 3 );
271 else if( !strncasecmp( psz_mess, "I: ", 3 ) )
273 intf_WarnMsg( 2, "network info: vlcs said '%s'", psz_mess + 3 );
275 else /* We got something to play ! FIXME: not very nice */
278 (&p_main->p_playlist->p_item[ p_main->p_playlist->i_index + 1])
279 vlc_mutex_lock( &p_main->p_playlist->change_lock );
282 free( p_item->psz_name );
283 p_item->psz_name = strdup( psz_mess );
284 /* Unlock _afterwards_ */
285 vlc_mutex_unlock( &p_main->p_playlist->change_lock );
289 /* Unlock _before_ */
290 vlc_mutex_unlock( &p_main->p_playlist->change_lock );
291 intf_PlaylistAdd( p_main->p_playlist, 0, psz_mess );
295 /* Close the socket and return nicely */
301 /* Following functions are local */
303 /*****************************************************************************
304 * GetMacAddress: extract the MAC Address
305 *****************************************************************************/
306 static int GetMacAddress( int i_fd, char *psz_mac )
308 #if defined( SYS_LINUX )
309 struct ifreq interface;
314 * Looking for information about the eth0 interface
316 interface.ifr_addr.sa_family = AF_INET;
317 if( !(psz_interface = config_GetPszVariable( "iface" )) )
319 intf_ErrMsg( "network error: configuration variable iface empty" );
322 strcpy( interface.ifr_name, psz_interface );
323 free( psz_interface );
325 i_ret = ioctl( i_fd, SIOCGIFHWADDR, &interface );
329 intf_ErrMsg( "network error: ioctl SIOCGIFHWADDR failed" );
333 sprintf( psz_mac, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
334 interface.ifr_hwaddr.sa_data[0] & 0xff,
335 interface.ifr_hwaddr.sa_data[1] & 0xff,
336 interface.ifr_hwaddr.sa_data[2] & 0xff,
337 interface.ifr_hwaddr.sa_data[3] & 0xff,
338 interface.ifr_hwaddr.sa_data[4] & 0xff,
339 interface.ifr_hwaddr.sa_data[5] & 0xff );
343 #elif defined( WIN32 )
346 /* Get adapter list - support for more than one adapter */
347 LANA_ENUM AdapterList;
350 intf_WarnMsg( 2, "network: looking for MAC address" );
352 memset( &Ncb, 0, sizeof( NCB ) );
353 Ncb.ncb_command = NCBENUM;
354 Ncb.ncb_buffer = (unsigned char *)&AdapterList;
355 Ncb.ncb_length = sizeof( AdapterList );
358 /* Get all of the local ethernet addresses */
359 for ( i = 0; i < AdapterList.length ; ++i )
361 if ( GetAdapterInfo ( AdapterList.lana[ i ], psz_mac ) == 0 )
370 strcpy( psz_mac, "00:00:00:00:00:00" );
377 /*****************************************************************************
378 * GetAdapterInfo : gets some informations about the interface using NETBIOS
379 *****************************************************************************/
380 static int GetAdapterInfo( int i_adapter, char *psz_string )
384 ADAPTER_STATUS adapt;
385 NAME_BUFFER psz_name[30];
388 /* Reset the LAN adapter so that we can begin querying it */
390 memset( &Ncb, 0, sizeof ( Ncb ) );
391 Ncb.ncb_command = NCBRESET;
392 Ncb.ncb_lana_num = i_adapter;
394 if( Netbios( &Ncb ) != NRC_GOODRET )
396 intf_ErrMsg( "network error: reset returned %i", Ncb.ncb_retcode );
400 /* Prepare to get the adapter status block */
401 memset( &Ncb, 0, sizeof( Ncb ) ) ; /* Initialization */
402 Ncb.ncb_command = NCBASTAT;
403 Ncb.ncb_lana_num = i_adapter;
405 strcpy( (char *)Ncb.ncb_callname, "*" );
407 memset( &Adapter, 0, sizeof ( Adapter ) );
408 Ncb.ncb_buffer = ( unsigned char * ) &Adapter;
409 Ncb.ncb_length = sizeof ( Adapter );
411 /* Get the adapter's info and, if this works, return it in standard,
412 * colon-delimited form. */
413 if ( Netbios( &Ncb ) == 0 )
415 sprintf ( psz_string, "%02X:%02X:%02X:%02X:%02X:%02X",
416 (int) ( Adapter.adapt.adapter_address[0] ),
417 (int) ( Adapter.adapt.adapter_address[1] ),
418 (int) ( Adapter.adapt.adapter_address[2] ),
419 (int) ( Adapter.adapt.adapter_address[3] ),
420 (int) ( Adapter.adapt.adapter_address[4] ),
421 (int) ( Adapter.adapt.adapter_address[5] ) );
423 intf_WarnMsg( 2, "network: found MAC address %s", psz_string );
429 intf_ErrMsg( "network error: ASTAT returned %i", Ncb.ncb_retcode );