BlinkenRecv.c (a62ca13) - BlinkenLib · BlinkenArea

BlinkenRecv.c

/* BlinkenLib
 * version 0.4.1 date 2005-12-05
 * Copyright 2004-2005 Stefan Schuermans <1stein@schuermans.info>
 * Copyleft: GNU public license - http://www.gnu.org/copyleft/gpl.html
 * a blinkenarea.org project
 * powered by eventphone.de
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include "BlinkenLib.h"

int main( int argCnt, char * * args )
{
  int i, udpSocket, bound, val, timeout;
  char txt[64];
  unsigned short port;
  struct sockaddr_in addr;
  stBlinkenMovie * pMovie;

//print info
  printf( "BlinkenLib - BlinkenRecv\n"
          "version 0.4.1 date 2005-12-05\n"
          "Copyright 2004-2005 Stefan Schuermans <1stein@schuermans.info>\n"
          "Copyleft: GNU public license - http://www.gnu.org/copyleft/gpl.html\n"
          "a blinkenarea.org project\n"
          "powered by eventphone.de\n\n" );

//print syntax
  if( argCnt <= 1 )
  {
    printf( "syntax: %s <parameter> [...]\n\n"
            "parameters:\n"
            "  -l [<ip>:]<port>\n"
            "     local address (defaults to 0.0.0.0:2323)\n"
            "     must occur before -r and -o, may only occur once\n"
            "  -r <ip>[:<port>]\n"
            "     remote addess (defaults to every remote address)\n"
            "  -t <milliseconds>\n"
            "     set timeout (to detect movie end, defaults to 5000)\n"
            "  -o <file>\n"
            "     receive movie and write it to file (*.blm, *.bmm, *.bml, *.bbm)\n\n",
            args[0] );
    return 0;
  }

//create udp socket
  udpSocket = socket( AF_INET, SOCK_DGRAM, IPPROTO_UDP );
  if( udpSocket == -1 )
  {
    printf( "cannot create UDP socket\n" );
    return -1;
  }
  bound = 0;

//process parameters
  timeout = 5000;
  for( i = 1; i < argCnt; i++ )
  {

//local address
    if( strcmp( args[i], "-l" ) == 0 )
    {
      if( i + 1 < argCnt )
      {
        i++;
        if( sscanf( args[i], "%32[0-9.]:%hu", txt, &port ) == 2 )
        {
          addr.sin_family = AF_INET;
          addr.sin_port = htons( port );
          addr.sin_addr.s_addr = inet_addr( txt );
          if( bind( udpSocket, (struct sockaddr *)&addr, sizeof( addr ) ) != 0 )
            printf( "could not set local address to \"%s\"\n", args[i] );
          else
            bound = 1;
        }
        else if( sscanf( args[i], "%hu", &port ) == 1 )
        {
          addr.sin_family = AF_INET;
          addr.sin_port = htons( port );
          addr.sin_addr.s_addr = htonl( INADDR_ANY );
          if( bind( udpSocket, (struct sockaddr *)&addr, sizeof( addr ) ) != 0 )
            printf( "could not set local address to \"%s\"\n", args[i] );
          else
            bound = 1;
        }
        else
          printf( "invalid local address \"%s\"\n", args[i] );
      }
      else
        printf( "missing local address for \"-l\"\n" );
    }

//remote address
    else if( strcmp( args[i], "-r" ) == 0 )
    {
      if( i + 1 < argCnt )
      {
        i++;
        if( sscanf( args[i], "%32[0-9.]:%hu", txt, &port ) == 2 )
        {
          addr.sin_family = AF_INET;
          addr.sin_port = htons( port );
          addr.sin_addr.s_addr = inet_addr( txt );
          if( connect( udpSocket, (struct sockaddr *)&addr, sizeof( addr ) ) != 0 )
            printf( "could not set remote address to \"%s\"\n", args[i] );
        }
        else if( sscanf( args[i], "%32[0-9.]", txt ) == 1 )
        {
          addr.sin_family = AF_INET;
          addr.sin_port = htons( 23230 );
          addr.sin_addr.s_addr = inet_addr( txt );
          if( connect( udpSocket, (struct sockaddr *)&addr, sizeof( addr ) ) != 0 )
            printf( "could not set remote address to \"%s\"\n", args[i] );
        }
        else
          printf( "invalid remote address \"%s\"\n", args[i] );
      }
      else
        printf( "missing remote address for \"-r\"\n" );
    }

//timeout
    else if( strcmp( args[i], "-t" ) == 0 )
    {
      if( i + 1 < argCnt )
      {
        i++;
        if( sscanf( args[i], "%hu", &val ) == 1 )
          timeout = val;
        else
          printf( "invalid timeout value \"%s\"\n", args[i] );
      }
      else
        printf( "missing timeout value for \"-t\"\n" );
    }

//receive movie and write it to file
    else if( strcmp( args[i], "-o" ) == 0 )
    {
      if( i + 1 < argCnt )
      {
        i++;
        if( ! bound ) //try to bind if not bound
        {
          printf( "no local address to receive movie for file \"%s\" to,\n"
                  "  using default local address \"0.0.0.0:2323\"\n", args[i] );
          addr.sin_family = AF_INET;
          addr.sin_port = htons( 2323 );
          addr.sin_addr.s_addr = htonl( INADDR_ANY );
          if( bind( udpSocket, (struct sockaddr *)&addr, sizeof( addr ) ) != 0 )
            printf( "could not set local address to \"0.0.0.0:2323\"\n" );
          else
            bound = 1;
        }
        if( bound )
        {
          printf( "receiving movie for file \"%s\"...\n", args[i] );
          pMovie = BlinkenMovieReceive( udpSocket, timeout, NULL );
          if( pMovie == NULL )
            printf( "could not receive movie for file \"%s\"\n", args[i] );
          else
          {
            if( BlinkenMovieSave( pMovie, args[i] ) < 0 )
              printf( "could not write movie \"%s\"\n", args[i] );
            else
              printf( "movie \"%s\" written\n", args[i] );
            BlinkenMovieFree( pMovie );
          }
        }
        else
          printf( "no local address set to receive movie for file \"%s\" on\n", args[i] );
      }
      else
        printf( "missing output filename for \"-o\"\n" );
    }

//unknown parameter
    else
      printf( "unknown parameter \"%s\", call without parameters to get help\n", args[i] );

} //for( i ...

//close socket
  close( udpSocket );

return 0;
}

BlinkenLib

BlinkenLib v.0.4.1 (2005-12-05)