input_vlan.c

vlc stand 0.1.99 ist sehr einfach

/*****************************************************************************
 * input_vlan.c: vlan management library
 *****************************************************************************
 * Copyright (C) 1999, 2000 VideoLAN
 *
 * Authors:
 *
 * 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 "defs.h"

#include <errno.h>                                                 /* ENOMEM */
#include <stdio.h>                                              /* sprintf() */
#include <unistd.h>                                               /* close() */
#include <string.h>                                   /* strerror(), bzero() */
#include <stdlib.h>                                                /* free() */

#if defined(SYS_BSD) || defined(SYS_BEOS)
#include <netinet/in.h>                                    /* struct in_addr */
#include <sys/socket.h>                                   /* struct sockaddr */
#endif

#if defined(SYS_LINUX) || defined(SYS_BSD) || defined(SYS_GNU)
#include <arpa/inet.h>                           /* inet_ntoa(), inet_aton() */
#endif

#ifdef SYS_LINUX
#include <sys/ioctl.h>                                            /* ioctl() */
#include <net/if.h>                            /* interface (arch-dependent) */
#endif

#include "config.h"
#include "common.h"
#include "threads.h"
#include "mtime.h"
#include "netutils.h"
#include "input_vlan.h"
#include "intf_msg.h"
#include "main.h"

/*****************************************************************************
 * input_vlan_t: vlan library data
 *****************************************************************************
 * Store global vlan library data.
 *****************************************************************************/
typedef struct input_vlan_s
{
    int         i_vlan_id;                            /* current vlan number */
    mtime_t     last_change;                             /* last change date */
} input_vlan_t;

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static int ZeTrucMucheFunction( int Channel );

/*****************************************************************************
 * input_VlanCreate: initialize global vlan method data
 *****************************************************************************
 * Initialize vlan input method global data. This function should be called
 * once before any input thread is created or any call to other input_Vlan*()
 * function is attempted.
 *****************************************************************************/
int input_VlanCreate( void )
{
#ifdef SYS_BEOS
    intf_ErrMsg( "error: vlans are not supported under beos\n" );
    return( 1 );
#else
    /* Allocate structure */
    p_main->p_vlan = malloc( sizeof( input_vlan_t ) );
    if( p_main->p_vlan == NULL )
    {
        intf_ErrMsg("error: %s\n", strerror(ENOMEM));
        return( 1 );
    }

    /* Initialize structure */
    p_main->p_vlan->i_vlan_id   = 0;
    p_main->p_vlan->last_change = 0;

    intf_Msg("VLANs initialized\n");
    return( 0 );
#endif /* SYS_BEOS */
}

/*****************************************************************************
 * input_VlanDestroy: free global vlan method data
 *****************************************************************************
 * Free resources allocated by input_VlanMethodInit. This function should be
 * called at the end of the program.
 *****************************************************************************/
void input_VlanDestroy( void )
{
    /* Return to default vlan */
    if( p_main->p_vlan->i_vlan_id != 0 )
    {
        input_VlanJoin( 0 );
    }

    /* Free structure */
    free( p_main->p_vlan );
}

/*****************************************************************************
 * input_VlanJoin: join a vlan
 *****************************************************************************
 * This function will try to join a vlan. If the relevant interface is already
 * on the good vlan, nothing will be done. Else, and if possible (if the
 * interface is not locked), the vlan server will be contacted and a change will
 * be requested. The function will block until the change is effective. Note
 * that once a vlan is no more used, it's interface should be unlocked using
 * input_VlanLeave().
 * Non 0 will be returned in case of error.
 *****************************************************************************/
int input_VlanJoin( int i_vlan_id )
{
#ifdef SYS_BEOS
    return( -1 );
#else
    /* If last change is too recent, wait a while */
    if( mdate() - p_main->p_vlan->last_change < INPUT_VLAN_CHANGE_DELAY )
    {
        intf_Msg("Waiting before changing VLAN...\n");
        mwait( p_main->p_vlan->last_change + INPUT_VLAN_CHANGE_DELAY );
    }
    p_main->p_vlan->last_change = mdate();
    p_main->p_vlan->i_vlan_id = i_vlan_id;

    intf_Msg("Joining VLAN %d (channel %d)\n", i_vlan_id + 2, i_vlan_id );
    return( ZeTrucMucheFunction( i_vlan_id ) ); /* FIXME: join vlan ?? */
#endif /* SYS_BEOS */
}

/*****************************************************************************
 * input_VlanLeave: leave a vlan
 *****************************************************************************
 * This function tells the vlan library that the designed interface is no more
 * locked and than vlan changes can occur.
 *****************************************************************************/
void input_VlanLeave( int i_vlan_id )
{
    /* XXX?? */
}

/* following functions are local */

static int ZeTrucMucheFunction( int Channel)
{
#ifdef SYS_LINUX
    int                         i_socket;
    char   *                    ipaddr;
    struct ifreq                interface;
    struct sockaddr_in          sa_server;
    struct sockaddr_in          sa_client;
    char                        mess[80];

    /*
     *Looking for informations about the eth0 interface
     */

    interface.ifr_addr.sa_family = AF_INET;
    strcpy( interface.ifr_name, main_GetPszVariable( INPUT_IFACE_VAR, INPUT_IFACE_DEFAULT ) );

    i_socket = socket( AF_INET, SOCK_DGRAM, 0 );

    /* Looking for the interface IP address */
    ioctl( i_socket, SIOCGIFDSTADDR, &interface );
    ipaddr = inet_ntoa((*(struct sockaddr_in *)(&(interface.ifr_addr))).sin_addr );

    /* Looking for the interface MAC address */
    ioctl( i_socket, SIOCGIFHWADDR, &interface );
    close( i_socket );

    /*
     * Getting address, port, ... of the server
     */

    /* Initialize */
    bzero( &sa_server, sizeof(struct sockaddr_in) );
    /* sin_family is ALWAYS set to AF_INET (see in man 7 ip)*/
    sa_server.sin_family = AF_INET;
    /* Giving port on to connect after having convert it*/
    sa_server.sin_port = htons ( main_GetIntVariable( INPUT_VLAN_PORT_VAR, INPUT_VLAN_PORT_DEFAULT ));
    /* Giving address after having convert it into binary data*/
    inet_aton( main_GetPszVariable( INPUT_VLAN_SERVER_VAR, INPUT_VLAN_SERVER_DEFAULT ), &(sa_server.sin_addr) );

    /*
     * Getting address, port, ... of the client
     */

    /* Initialize */
    bzero( &sa_client, sizeof(struct sockaddr_in) );
    /* sin_family is ALWAYS set to AF_INET (see in man 7 ip)*/
    sa_client.sin_family = AF_INET;
    /* Giving port on to connect after having convert it*/
    sa_client.sin_port = htons( 0 );
    /* Giving address after having convert it into binary data*/
    inet_aton( ipaddr, &(sa_client.sin_addr) );

    /* Initialization of the socket */
    i_socket = socket(AF_INET, SOCK_DGRAM, 17 ); /* XXX?? UDP */
     /*  SOCK_DGRAM because here we use DATAGRAM
      * Sachant qu'il y a un #define AF_INET = PF_INET dans sys/socket.h et que PF_INET est le IP protocol family ...
      * Protocol is in #define, should be 17 for udp */

    /* Elaborate the message to send */
        sprintf( mess , "%d %s %2.2x%2.2x%2.2x%2.2x%2.2x%2.2x %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x \n",
            Channel, ipaddr,
            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,
                    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
        );

    /* Send the message */
    intf_DbgMsg("%s\n", mess);
        sendto(i_socket,mess,80,0,(struct sockaddr *)&sa_server,sizeof(struct sockaddr));

    /*Close the socket */
    close( i_socket );
#endif

    return 0;
}