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netutils.c
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2003-04-07
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/*****************************************************************************
* netutils.c: various network functions
*****************************************************************************
* Copyright (C) 1999-2001 VideoLAN
* $Id: netutils.c,v 1.81 2003/03/12 05:26:46 sam Exp $
*
* Authors: Vincent Seguin <seguin@via.ecp.fr>
* Benoit Steiner <benny@via.ecp.fr>
* Henri Fallon <henri@videolan.org>
* Xavier Marchesini <xav@alarue.net>
* Christophe Massiot <massiot@via.ecp.fr>
* Samuel Hocevar <sam@via.ecp.fr>
* Jon Lech Johansen <jon-vl@nanocrew.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h> /* free(), realloc(), atoi() */
#include <string.h> /* memset() */
#include <vlc/vlc.h>
#ifdef HAVE_ERRNO_H
# include <errno.h> /* errno() */
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h> /* gethostname() */
#elif defined( WIN32 ) && !defined( UNDER_CE )
# include <io.h>
#endif
#if !defined( _MSC_VER )
#include <sys/time.h> /* gettimeofday */
#endif
#if defined( UNDER_CE )
/* No real network support (FIXME: use winsock1?) */
#elif defined( WIN32 )
# include <winsock2.h>
#else
# include <netdb.h> /* hostent ... */
# include <sys/socket.h> /* BSD: struct sockaddr */
# include <netinet/in.h> /* BSD: struct in_addr */
# ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h> /* inet_ntoa(), inet_aton() */
# endif
#endif
#ifdef SYS_LINUX
#include <sys/ioctl.h> /* ioctl() */
#endif
#ifdef SYS_DARWIN
#include <IOKit/IOKitLib.h>
#include <IOKit/network/IOEthernetInterface.h>
#include <IOKit/network/IOEthernetController.h>
#endif
#if defined( WIN32 ) && !defined( UNDER_CE )
/* tools to get the MAC adress from the interface under Windows */
# include <windows.h>
# include <stdio.h>
# include <nb30.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h> /* interface (arch-dependent) */
#endif
#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif
#include "netutils.h"
#include "vlc_playlist.h"
#include "network.h"
/*****************************************************************************
* input_channel_t: channel library data
*****************************************************************************
* Store global channel library data.
* The part of the code concerning the channel changing process is unstable
* as it depends on the VideoLAN channel server, which isn't frozen for
* the time being.
*****************************************************************************/
struct input_channel_t
{
int i_channel; /* current channel number */
mtime_t last_change; /* last change date */
};
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int GetMacAddress ( vlc_object_t *, int i_fd, char *psz_mac );
#ifdef SYS_DARWIN
static int GetNetIntfCtrl ( const char *psz_interface,
io_object_t *ctrl_service );
#elif defined( WIN32 ) && !defined( UNDER_CE )
static int GetAdapterInfo ( int i_adapter, char *psz_string );
#endif
/*****************************************************************************
* network_ChannelCreate: initialize global channel method data
*****************************************************************************
* Initialize channel input method global data. This function should be called
* once before any input thread is created or any call to other
* input_Channel*() function is attempted.
*****************************************************************************/
int __network_ChannelCreate( vlc_object_t *p_this )
{
#if !defined( SYS_LINUX ) && !( defined( WIN32 ) && !defined( UNDER_CE ) )
msg_Warn( p_this, "VLAN-based channels are not supported "
"on this architecture" );
#endif
/* Allocate structure */
p_this->p_vlc->p_channel = malloc( sizeof( input_channel_t ) );
if( p_this->p_vlc->p_channel == NULL )
{
msg_Err( p_this, "out of memory" );
return( -1 );
}
/* Initialize structure */
p_this->p_vlc->p_channel->i_channel = 0;
p_this->p_vlc->p_channel->last_change = 0;
msg_Dbg( p_this, "channels initialized" );
return( 0 );
}
/*****************************************************************************
* network_ChannelJoin: join a channel
*****************************************************************************
* This function will try to join a channel. If the relevant interface is
* already on the good channel, nothing will be done. Else, and if possible
* (if the interface is not locked), the channel server will be contacted
* and a change will be requested. The function will block until the change
* is effective. Note that once a channel is no more used, its interface
* should be unlocked using input_ChannelLeave().
* Non 0 will be returned in case of error.
*****************************************************************************/
int __network_ChannelJoin( vlc_object_t *p_this, int i_channel )
{
#define VLCS_VERSION 13
#define MESSAGE_LENGTH 256
#if defined( SYS_LINUX ) || ( defined( WIN32 ) && !defined( UNDER_CE ) )
module_t * p_network;
char * psz_network = NULL;
network_socket_t socket_desc;
char psz_mess[ MESSAGE_LENGTH ];
char psz_mac[ 40 ];
int i_fd, i_port;
char *psz_vlcs;
struct timeval delay;
fd_set fds;
if( p_this->p_vlc->p_channel == NULL )
{
msg_Warn( p_this, "channels not initialized" );
return 0;
}
if( p_this->p_vlc->p_channel->i_channel == i_channel )
{
return 0;
}
if( !config_GetInt( p_this, "network-channel" ) )
{
msg_Err( p_this, "channels disabled, to enable them, use the"
" --channels option" );
return -1;
}
if( config_GetInt( p_this, "ipv4" ) )
{
psz_network = "ipv4";
}
if( config_GetInt( p_this, "ipv6" ) )
{
psz_network = "ipv6";
}
/* Getting information about the channel server */
if( !(psz_vlcs = config_GetPsz( p_this, "channel-server" )) )
{
msg_Err( p_this, "configuration variable channel-server empty" );
return -1;
}
i_port = config_GetInt( p_this, "channel-port" );
msg_Dbg( p_this, "connecting to %s:%d", psz_vlcs, i_port );
/* Prepare the network_socket_t structure */
socket_desc.i_type = NETWORK_UDP;
socket_desc.psz_bind_addr = "";
socket_desc.i_bind_port = 4321;
socket_desc.psz_server_addr = psz_vlcs;
socket_desc.i_server_port = i_port;
/* Find an appropriate network module */
p_this->p_private = (void*) &socket_desc;
p_network = module_Need( p_this, "network", psz_network/*, &socket_desc*/ );
if( p_network == NULL )
{
return( -1 );
}
module_Unneed( p_this, p_network );
free( psz_vlcs ); /* Do we really need this ? -- Meuuh */
i_fd = socket_desc.i_handle;
/* Look for the interface MAC address */
if( GetMacAddress( p_this, i_fd, psz_mac ) )
{
msg_Err( p_this, "failed getting MAC address" );
close( i_fd );
return -1;
}
msg_Dbg( p_this, "MAC address is %s", psz_mac );
/* Build the message */
sprintf( psz_mess, "%d %u %lu %s \n", i_channel, VLCS_VERSION,
(unsigned long)(mdate() / (uint64_t)1000000),
psz_mac );
/* Send the message */
send( i_fd, psz_mess, MESSAGE_LENGTH, 0 );
msg_Dbg( p_this, "attempting to join channel %d", i_channel );
/* We have changed channels ! (or at least, we tried) */
p_this->p_vlc->p_channel->last_change = mdate();
p_this->p_vlc->p_channel->i_channel = i_channel;
/* Wait 5 sec for an answer from the server */
delay.tv_sec = 5;
delay.tv_usec = 0;
FD_ZERO( &fds );
FD_SET( i_fd, &fds );
switch( select( i_fd + 1, &fds, NULL, NULL, &delay ) )
{
case 0:
msg_Err( p_this, "no answer from vlcs" );
close( i_fd );
return -1;
case -1:
msg_Err( p_this, "error while listening to vlcs" );
close( i_fd );
return -1;
}
recv( i_fd, psz_mess, MESSAGE_LENGTH, 0 );
psz_mess[ MESSAGE_LENGTH - 1 ] = '\0';
if( !strncasecmp( psz_mess, "E:", 2 ) )
{
msg_Err( p_this, "vlcs said '%s'", psz_mess + 2 );
close( i_fd );
return -1;
}
else if( !strncasecmp( psz_mess, "I:", 2 ) )
{
msg_Dbg( p_this, "vlcs said '%s'", psz_mess + 2 );
}
else
{
/* We got something to play ! */
playlist_t *p_playlist;
p_playlist = vlc_object_find( p_this, VLC_OBJECT_PLAYLIST,
FIND_ANYWHERE );
if( p_playlist != NULL )
{
playlist_Add( p_playlist, psz_mess,
PLAYLIST_APPEND | PLAYLIST_GO, PLAYLIST_END );
vlc_object_release( p_playlist );
}
}
/* Close the socket and return nicely */
# if defined( WIN32 )
closesocket( i_fd );
# else
close( i_fd );
# endif
#endif
return 0;
}
/* Following functions are local */
/*****************************************************************************
* GetMacAddress: extract the MAC Address
*****************************************************************************/
static int GetMacAddress( vlc_object_t *p_this, int i_fd, char *psz_mac )
{
#if defined( SYS_LINUX )
struct ifreq interface;
int i_ret;
char *psz_interface;
/*
* Looking for information about the eth0 interface
*/
interface.ifr_addr.sa_family = AF_INET;
if( !(psz_interface = config_GetPsz( p_this, "iface" )) )
{
msg_Err( p_this, "configuration variable iface empty" );
return -1;
}
strcpy( interface.ifr_name, psz_interface );
free( psz_interface );
i_ret = ioctl( i_fd, SIOCGIFHWADDR, &interface );
if( i_ret )
{
msg_Err( p_this, "ioctl SIOCGIFHWADDR failed" );
return( i_ret );
}
sprintf( psz_mac, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
interface.ifr_hwaddr.sa_data[0] & 0xff,
interface.ifr_hwaddr.sa_data[1] & 0xff,
interface.ifr_hwaddr.sa_data[2] & 0xff,
interface.ifr_hwaddr.sa_data[3] & 0xff,
interface.ifr_hwaddr.sa_data[4] & 0xff,
interface.ifr_hwaddr.sa_data[5] & 0xff );
return( 0 );
#elif defined( SYS_DARWIN )
char *psz_interface;
io_object_t ctrl_service;
CFTypeRef cfd_mac_address;
UInt8 ui_mac_address[kIOEthernetAddressSize];
if( !(psz_interface = config_GetPsz( p_this, "iface" )) )
{
msg_Err( p_this, "configuration variable iface empty" );
return( -1 );
}
if( GetNetIntfCtrl( psz_interface, &ctrl_service ) )
{
msg_Err( p_this, "GetNetIntfCtrl failed" );
return( -1 );
}
cfd_mac_address = IORegistryEntryCreateCFProperty( ctrl_service,
CFSTR(kIOMACAddress),
kCFAllocatorDefault,
0 );
IOObjectRelease( ctrl_service );
if( cfd_mac_address == NULL )
{
msg_Err( p_this, "IORegistryEntryCreateCFProperty failed" );
return( -1 );
}
CFDataGetBytes( cfd_mac_address,
CFRangeMake(0, kIOEthernetAddressSize),
ui_mac_address );
CFRelease( cfd_mac_address );
sprintf( psz_mac, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
ui_mac_address[0], ui_mac_address[1],
ui_mac_address[2], ui_mac_address[3],
ui_mac_address[4], ui_mac_address[5] );
return( 0 );
#elif defined( WIN32 ) && !defined( UNDER_CE )
int i, i_ret = -1;
/* Get adapter list - support for more than one adapter */
LANA_ENUM AdapterList;
NCB Ncb;
msg_Dbg( p_this, "looking for MAC address" );
memset( &Ncb, 0, sizeof( NCB ) );
Ncb.ncb_command = NCBENUM;
Ncb.ncb_buffer = (unsigned char *)&AdapterList;
Ncb.ncb_length = sizeof( AdapterList );
Netbios( &Ncb );
/* Get all of the local ethernet addresses */
for ( i = 0; i < AdapterList.length ; ++i )
{
if ( GetAdapterInfo ( AdapterList.lana[ i ], psz_mac ) == 0 )
{
i_ret = 0;
}
}
return( i_ret );
#else
strcpy( psz_mac, "00:00:00:00:00:00" );
return( 0 );
#endif
}
#ifdef SYS_DARWIN
/*****************************************************************************
* GetNetIntfCtrl : get parent controller for network interface
*****************************************************************************/
static int GetNetIntfCtrl( const char *psz_interface,
io_object_t *ctrl_service )
{
mach_port_t port;
kern_return_t ret;
io_object_t intf_service;
io_iterator_t intf_iterator;
/* get port for IOKit communication */
if( ( ret = IOMasterPort( MACH_PORT_NULL, &port ) ) != KERN_SUCCESS )
{
return( -1 );
}
/* look up the IOService object for the interface */
ret = IOServiceGetMatchingServices( port, IOBSDNameMatching( port, 0,
psz_interface ), &intf_iterator );
if( ret != KERN_SUCCESS )
{
return( -1 );
}
intf_service = IOIteratorNext( intf_iterator );
if( intf_service == NULL )
{
return( -1 );
}
ret = IORegistryEntryGetParentEntry( intf_service,
kIOServicePlane,
ctrl_service );
IOObjectRelease( intf_service );
if( ret != KERN_SUCCESS )
{
return( -1 );
}
return( 0 );
}
#elif defined( WIN32 ) && !defined( UNDER_CE )
/*****************************************************************************
* GetAdapterInfo : gets some informations about the interface using NETBIOS
*****************************************************************************/
static int GetAdapterInfo( int i_adapter, char *psz_string )
{
struct ASTAT
{
ADAPTER_STATUS adapt;
NAME_BUFFER psz_name[30];
} Adapter;
/* Reset the LAN adapter so that we can begin querying it */
NCB Ncb;
memset( &Ncb, 0, sizeof ( Ncb ) );
Ncb.ncb_command = NCBRESET;
Ncb.ncb_lana_num = i_adapter;
if( Netbios( &Ncb ) != NRC_GOODRET )
{
//X intf_ErrMsg( "network error: reset returned %i", Ncb.ncb_retcode );
return -1;
}
/* Prepare to get the adapter status block */
memset( &Ncb, 0, sizeof( Ncb ) ) ; /* Initialization */
Ncb.ncb_command = NCBASTAT;
Ncb.ncb_lana_num = i_adapter;
strcpy( (char *)Ncb.ncb_callname, "*" );
memset( &Adapter, 0, sizeof ( Adapter ) );
Ncb.ncb_buffer = ( unsigned char * ) &Adapter;
Ncb.ncb_length = sizeof ( Adapter );
/* Get the adapter's info and, if this works, return it in standard,
* colon-delimited form. */
if ( Netbios( &Ncb ) == 0 )
{
sprintf ( psz_string, "%02X:%02X:%02X:%02X:%02X:%02X",
(int) ( Adapter.adapt.adapter_address[0] ),
(int) ( Adapter.adapt.adapter_address[1] ),
(int) ( Adapter.adapt.adapter_address[2] ),
(int) ( Adapter.adapt.adapter_address[3] ),
(int) ( Adapter.adapt.adapter_address[4] ),
(int) ( Adapter.adapt.adapter_address[5] ) );
//X intf_WarnMsg( 2, "network: found MAC address %s", psz_string );
return 0;
}
else
{
//X intf_ErrMsg( "network error: ASTAT returned %i", Ncb.ncb_retcode );
return -1;
}
}
#endif /* WIN32 */