1 /*****************************************************************************
2 * netutils.c: various network functions
3 *****************************************************************************
4 * Copyright (C) 1999-2001 VideoLAN
5 * $Id: netutils.c,v 1.73 2002/07/31 20:56:53 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>
78 #include "vlc_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 struct input_channel_t
92 int i_channel; /* current channel number */
93 mtime_t last_change; /* last change date */
96 /*****************************************************************************
98 *****************************************************************************/
99 static int GetMacAddress ( vlc_object_t *, 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( vlc_object_t *p_this )
113 #if !defined( SYS_LINUX ) && !defined( WIN32 )
114 msg_Err( p_this, "VLAN-based channels are not supported "
115 "on this architecture" );
118 /* Allocate structure */
119 p_this->p_vlc->p_channel = malloc( sizeof( input_channel_t ) );
120 if( p_this->p_vlc->p_channel == NULL )
122 msg_Err( p_this, "out of memory" );
126 /* Initialize structure */
127 p_this->p_vlc->p_channel->i_channel = 0;
128 p_this->p_vlc->p_channel->last_change = 0;
130 msg_Dbg( p_this, "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( vlc_object_t *p_this, int i_channel )
147 #define VLCS_VERSION 13
148 #define MESSAGE_LENGTH 256
150 module_t * 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( p_this->p_vlc->p_channel->i_channel == i_channel )
165 if( !config_GetInt( p_this, "network-channel" ) )
167 msg_Err( p_this, "channels disabled, to enable them, use the"
168 " --channels option" );
172 if( config_GetInt( p_this, "ipv4" ) )
174 psz_network = "ipv4";
176 if( config_GetInt( p_this, "ipv6" ) )
178 psz_network = "ipv6";
181 /* Getting information about the channel server */
182 if( !(psz_vlcs = config_GetPsz( p_this, "channel-server" )) )
184 msg_Err( p_this, "configuration variable channel-server empty" );
188 i_port = config_GetInt( p_this, "channel-port" );
190 msg_Dbg( p_this, "connecting to %s:%d", psz_vlcs, i_port );
192 /* Prepare the network_socket_t structure */
193 socket_desc.i_type = NETWORK_UDP;
194 socket_desc.psz_bind_addr = "";
195 socket_desc.i_bind_port = 4321;
196 socket_desc.psz_server_addr = psz_vlcs;
197 socket_desc.i_server_port = i_port;
199 /* Find an appropriate network module */
200 p_network = module_Need( p_this, "network", psz_network/*, &socket_desc*/ );
201 if( p_network == NULL )
205 module_Unneed( p_this, p_network );
207 free( psz_vlcs ); /* Do we really need this ? -- Meuuh */
208 i_fd = socket_desc.i_handle;
210 /* Look for the interface MAC address */
211 if( GetMacAddress( p_this, i_fd, psz_mac ) )
213 msg_Err( p_this, "failed getting MAC address" );
218 msg_Dbg( p_this, "MAC address is %s", psz_mac );
220 /* Build the message */
221 sprintf( psz_mess, "%d %u %lu %s \n", i_channel, VLCS_VERSION,
222 (unsigned long)(mdate() / (u64)1000000),
225 /* Send the message */
226 send( i_fd, psz_mess, MESSAGE_LENGTH, 0 );
228 msg_Dbg( p_this, "attempting to join channel %d", i_channel );
230 /* We have changed channels ! (or at least, we tried) */
231 p_this->p_vlc->p_channel->last_change = mdate();
232 p_this->p_vlc->p_channel->i_channel = i_channel;
234 /* Wait 5 sec for an answer from the server */
238 FD_SET( i_fd, &fds );
240 switch( select( i_fd + 1, &fds, NULL, NULL, &delay ) )
243 msg_Err( p_this, "no answer from vlcs" );
248 msg_Err( p_this, "error while listening to vlcs" );
253 recv( i_fd, psz_mess, MESSAGE_LENGTH, 0 );
254 psz_mess[ MESSAGE_LENGTH - 1 ] = '\0';
256 if( !strncasecmp( psz_mess, "E:", 2 ) )
258 msg_Err( p_this, "vlcs said '%s'", psz_mess + 2 );
262 else if( !strncasecmp( psz_mess, "I:", 2 ) )
264 msg_Dbg( p_this, "vlcs said '%s'", psz_mess + 2 );
268 /* We got something to play ! */
269 playlist_t *p_playlist;
270 p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
272 if( p_playlist != NULL )
274 playlist_Add( p_playlist, psz_mess,
275 PLAYLIST_APPEND | PLAYLIST_GO, PLAYLIST_END );
276 vlc_object_release( p_playlist );
280 /* Close the socket and return nicely */
290 /* Following functions are local */
292 /*****************************************************************************
293 * GetMacAddress: extract the MAC Address
294 *****************************************************************************/
295 static int GetMacAddress( vlc_object_t *p_this, int i_fd, char *psz_mac )
297 #if defined( SYS_LINUX )
298 struct ifreq interface;
303 * Looking for information about the eth0 interface
305 interface.ifr_addr.sa_family = AF_INET;
306 if( !(psz_interface = config_GetPsz( p_this, "iface" )) )
308 msg_Err( p_this, "configuration variable iface empty" );
311 strcpy( interface.ifr_name, psz_interface );
312 free( psz_interface );
314 i_ret = ioctl( i_fd, SIOCGIFHWADDR, &interface );
318 msg_Err( p_this, "ioctl SIOCGIFHWADDR failed" );
322 sprintf( psz_mac, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
323 interface.ifr_hwaddr.sa_data[0] & 0xff,
324 interface.ifr_hwaddr.sa_data[1] & 0xff,
325 interface.ifr_hwaddr.sa_data[2] & 0xff,
326 interface.ifr_hwaddr.sa_data[3] & 0xff,
327 interface.ifr_hwaddr.sa_data[4] & 0xff,
328 interface.ifr_hwaddr.sa_data[5] & 0xff );
332 #elif defined( WIN32 )
335 /* Get adapter list - support for more than one adapter */
336 LANA_ENUM AdapterList;
339 msg_Dbg( p_this, "looking for MAC address" );
341 memset( &Ncb, 0, sizeof( NCB ) );
342 Ncb.ncb_command = NCBENUM;
343 Ncb.ncb_buffer = (unsigned char *)&AdapterList;
344 Ncb.ncb_length = sizeof( AdapterList );
347 /* Get all of the local ethernet addresses */
348 for ( i = 0; i < AdapterList.length ; ++i )
350 if ( GetAdapterInfo ( AdapterList.lana[ i ], psz_mac ) == 0 )
359 strcpy( psz_mac, "00:00:00:00:00:00" );
366 /*****************************************************************************
367 * GetAdapterInfo : gets some informations about the interface using NETBIOS
368 *****************************************************************************/
369 static int GetAdapterInfo( int i_adapter, char *psz_string )
373 ADAPTER_STATUS adapt;
374 NAME_BUFFER psz_name[30];
377 /* Reset the LAN adapter so that we can begin querying it */
379 memset( &Ncb, 0, sizeof ( Ncb ) );
380 Ncb.ncb_command = NCBRESET;
381 Ncb.ncb_lana_num = i_adapter;
383 if( Netbios( &Ncb ) != NRC_GOODRET )
385 //X intf_ErrMsg( "network error: reset returned %i", Ncb.ncb_retcode );
389 /* Prepare to get the adapter status block */
390 memset( &Ncb, 0, sizeof( Ncb ) ) ; /* Initialization */
391 Ncb.ncb_command = NCBASTAT;
392 Ncb.ncb_lana_num = i_adapter;
394 strcpy( (char *)Ncb.ncb_callname, "*" );
396 memset( &Adapter, 0, sizeof ( Adapter ) );
397 Ncb.ncb_buffer = ( unsigned char * ) &Adapter;
398 Ncb.ncb_length = sizeof ( Adapter );
400 /* Get the adapter's info and, if this works, return it in standard,
401 * colon-delimited form. */
402 if ( Netbios( &Ncb ) == 0 )
404 sprintf ( psz_string, "%02X:%02X:%02X:%02X:%02X:%02X",
405 (int) ( Adapter.adapt.adapter_address[0] ),
406 (int) ( Adapter.adapt.adapter_address[1] ),
407 (int) ( Adapter.adapt.adapter_address[2] ),
408 (int) ( Adapter.adapt.adapter_address[3] ),
409 (int) ( Adapter.adapt.adapter_address[4] ),
410 (int) ( Adapter.adapt.adapter_address[5] ) );
412 //X intf_WarnMsg( 2, "network: found MAC address %s", psz_string );
418 //X intf_ErrMsg( "network error: ASTAT returned %i", Ncb.ncb_retcode );