usr.sbin/mtest/mtest.c

   1 /*
   2  * Program to test new [sg]etsockopts and ioctls for manipulating IP and
   3  * Ethernet multicast address filters.
   4  *
   5  * Written by Steve Deering, Stanford University, February 1989.
   6  *
   7  * $FreeBSD: src/usr.sbin/mtest/mtest.c,v 1.4.6.1 2001/07/19 05:09:25 kris Exp $
   8  * $DragonFly: src/usr.sbin/mtest/mtest.c,v 1.2 2003/06/17 04:29:57 dillon Exp $
   9  */
  10
  11 #include <err.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <sys/types.h>
  15 #include <sys/socket.h>
  16 #include <sys/time.h>
  17 #include <net/if.h>
  18 #include <net/if_dl.h>
  19 #include <sys/ioctl.h>
  20 #include <netinet/in.h>
  21
  22 int
  23 main( argc, argv )
  24     int argc;
  25     char **argv;
  26   {
  27     int so;
  28     char line[80];
  29     char *lineptr;
  30     struct ip_mreq imr;
  31     struct ifreq ifr;
  32     int n, f;
  33     unsigned i1, i2, i3, i4, g1, g2, g3, g4;
  34     unsigned e1, e2, e3, e4, e5, e6;
  35
  36     if( (so = socket( AF_INET, SOCK_DGRAM, 0 )) == -1)
  37         err( 1, "can't open socket" );
  38
  39     printf( "multicast membership test program; " );
  40     printf( "enter ? for list of commands\n" );
  41
  42     while( fgets( line, 79, stdin ) != NULL )
  43       {
  44         lineptr = line;
  45         while( *lineptr == ' ' || *lineptr == '\t' ) ++lineptr;
  46         switch( *lineptr )
  47           {
  48             case '?':
  49               {
  50                 printf( "%s%s%s%s%s%s%s",
  51                 " j g.g.g.g i.i.i.i      - join  IP  multicast group     \n",
  52                 " l g.g.g.g i.i.i.i      - leave IP  multicast group     \n",
  53                 " a ifname e.e.e.e.e.e   - add ether multicast address   \n",
  54                 " d ifname e.e.e.e.e.e   - del ether multicast address   \n",
  55                 " m ifname 1/0           - set/clear ether allmulti flag \n",
  56                 " p ifname 1/0           - set/clear ether promisc flag  \n",
  57                 " q                      - quit                      \n\n" );
  58                 break;
  59               }
  60
  61             case 'j':
  62               {
  63                 ++lineptr;
  64                 while( *lineptr == ' ' || *lineptr == '\t' ) ++lineptr;
  65                 if( (n = sscanf( lineptr, "%u.%u.%u.%u %u.%u.%u.%u",
  66                     &g1, &g2, &g3, &g4, &i1, &i2, &i3, &i4 )) != 8 )
  67                   {
  68                     printf( "bad args\n" );
  69                     break;
  70                   }
  71                 imr.imr_multiaddr.s_addr = (g1<<24) | (g2<<16) | (g3<<8) | g4;
  72                 imr.imr_multiaddr.s_addr = htonl(imr.imr_multiaddr.s_addr);
  73                 imr.imr_interface.s_addr = (i1<<24) | (i2<<16) | (i3<<8) | i4;
  74                 imr.imr_interface.s_addr = htonl(imr.imr_interface.s_addr);
  75                 if( setsockopt( so, IPPROTO_IP, IP_ADD_MEMBERSHIP,
  76                                 &imr, sizeof(struct ip_mreq) ) == -1 )
  77                      warn( "can't join group" );
  78                 else printf( "group joined\n" );
  79                 break;
  80               }
  81
  82             case 'l':
  83               {
  84                 ++lineptr;
  85                 while( *lineptr == ' ' || *lineptr == '\t' ) ++lineptr;
  86                 if( (n = sscanf( lineptr, "%u.%u.%u.%u %u.%u.%u.%u",
  87                     &g1, &g2, &g3, &g4, &i1, &i2, &i3, &i4 )) != 8 )
  88                   {
  89                     printf( "bad args\n" );
  90                     break;
  91                   }
  92                 imr.imr_multiaddr.s_addr = (g1<<24) | (g2<<16) | (g3<<8) | g4;
  93                 imr.imr_multiaddr.s_addr = htonl(imr.imr_multiaddr.s_addr);
  94                 imr.imr_interface.s_addr = (i1<<24) | (i2<<16) | (i3<<8) | i4;
  95                 imr.imr_interface.s_addr = htonl(imr.imr_interface.s_addr);
  96                 if( setsockopt( so, IPPROTO_IP, IP_DROP_MEMBERSHIP,
  97                                 &imr, sizeof(struct ip_mreq) ) == -1 )
  98                      warn( "can't leave group" );
  99                 else printf( "group left\n" );
 100                 break;
 101               }
 102
 103             case 'a':
 104               {
 105                 struct sockaddr_dl *dlp;
 106                 unsigned char *bp;
 107                 ++lineptr;
 108                 while( *lineptr == ' ' || *lineptr == '\t' ) ++lineptr;
 109                 if( (n = sscanf( lineptr, "%s %x.%x.%x.%x.%x.%x",
 110                         ifr.ifr_name, &e1, &e2, &e3, &e4, &e5, &e6 )) != 7 )
 111                   {
 112                     printf( "bad args\n" );
 113                     break;
 114                   }
 115                 dlp = (struct sockaddr_dl *)&ifr.ifr_addr;
 116                 dlp->sdl_len = sizeof(struct sockaddr_dl);
 117                 dlp->sdl_family = AF_LINK;
 118                 dlp->sdl_index = 0;
 119                 dlp->sdl_nlen = 0;
 120                 dlp->sdl_alen = 6;
 121                 dlp->sdl_slen = 0;
 122                 bp = LLADDR(dlp);
 123                 bp[0] = e1;
 124                 bp[1] = e2;
 125                 bp[2] = e3;
 126                 bp[3] = e4;
 127                 bp[4] = e5;
 128                 bp[5] = e6;
 129                 if( ioctl( so, SIOCADDMULTI, &ifr ) == -1 )
 130                      warn( "can't add ether address" );
 131                 else printf( "ether address added\n" );
 132                 break;
 133               }
 134
 135             case 'd':
 136               {
 137                 struct sockaddr_dl *dlp;
 138                 unsigned char *bp;
 139                 ++lineptr;
 140                 while( *lineptr == ' ' || *lineptr == '\t' ) ++lineptr;
 141                 if( (n = sscanf( lineptr, "%s %x.%x.%x.%x.%x.%x",
 142                         ifr.ifr_name, &e1, &e2, &e3, &e4, &e5, &e6 )) != 7 )
 143                   {
 144                     printf( "bad args\n" );
 145                     break;
 146                   }
 147                 dlp = (struct sockaddr_dl *)&ifr.ifr_addr;
 148                 dlp->sdl_len = sizeof(struct sockaddr_dl);
 149                 dlp->sdl_family = AF_LINK;
 150                 dlp->sdl_index = 0;
 151                 dlp->sdl_nlen = 0;
 152                 dlp->sdl_alen = 6;
 153                 dlp->sdl_slen = 0;
 154                 bp = LLADDR(dlp);
 155                 bp[0] = e1;
 156                 bp[1] = e2;
 157                 bp[2] = e3;
 158                 bp[3] = e4;
 159                 bp[4] = e5;
 160                 bp[5] = e6;
 161                 if( ioctl( so, SIOCDELMULTI, &ifr ) == -1 )
 162                      warn( "can't delete ether address" );
 163                 else printf( "ether address deleted\n" );
 164                 break;
 165               }
 166
 167             case 'm':
 168               {
 169                 ++lineptr;
 170                 while( *lineptr == ' ' || *lineptr == '\t' ) ++lineptr;
 171                 if( (n = sscanf( lineptr, "%s %u", ifr.ifr_name, &f )) != 2 )
 172                   {
 173                     printf( "bad args\n" );
 174                     break;
 175                   }
 176                 if( ioctl( so, SIOCGIFFLAGS, &ifr ) == -1 )
 177                   {
 178                     warn( "can't get interface flags" );
 179                     break;
 180                   }
 181                 printf( "interface flags %x, ", ifr.ifr_flags );
 182                 fflush( stdout );
 183                 if( f ) ifr.ifr_flags |=  IFF_ALLMULTI;
 184                 else    ifr.ifr_flags &= ~IFF_ALLMULTI;
 185                 if( ioctl( so, SIOCSIFFLAGS, &ifr ) == -1 )
 186                      warn( "can't set" );
 187                 else printf( "changed to %x\n", ifr.ifr_flags );
 188                 break;
 189               }
 190
 191             case 'p':
 192               {
 193                 ++lineptr;
 194                 while( *lineptr == ' ' || *lineptr == '\t' ) ++lineptr;
 195                 if( (n = sscanf( lineptr, "%s %u", ifr.ifr_name, &f )) != 2 )
 196                   {
 197                     printf( "bad args\n" );
 198                     break;
 199                   }
 200                 if( ioctl( so, SIOCGIFFLAGS, &ifr ) == -1 )
 201                   {
 202                     warn( "can't get interface flags" );
 203                     break;
 204                   }
 205                 printf( "interface flags %x, ", ifr.ifr_flags );
 206                 fflush( stdout );
 207                 if( f ) ifr.ifr_flags |=  IFF_PROMISC;
 208                 else    ifr.ifr_flags &= ~IFF_PROMISC;
 209                 if( ioctl( so, SIOCSIFFLAGS, &ifr ) == -1 )
 210                      warn( "can't set" );
 211                 else printf( "changed to %x\n", ifr.ifr_flags );
 212                 break;
 213               }
 214
 215             case 'q': exit( 0 );
 216
 217             case 0:
 218             case '\n': break;
 219
 220             default:
 221               {
 222                 printf( "bad command\n" );
 223                 break;
 224               }
 225           }
 226       }
 227   return(0);
 228   }