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