freebsd-dev/usr.sbin/mtest/mtest.c
Julian Elischer 4a71a2e71b Use AF_LINK rather than AF_UNSPEC to set an ethernet multicast address.
This is obviously  not a terribly used function as it's apparently been
broken forever.
It IS possible that this fix is wrong and that the KERNEL is wrong
(in which case you should fix if_ethersubr.c) either way it certainly has more hope of
working now than before. I'd take it to 2.2 except that obviously no-one cares :-)
1998-05-28 07:31:30 +00:00

225 lines
5.7 KiB
C

/*
* Program to test new [sg]etsockopts and ioctls for manipulating IP and
* Ethernet multicast address filters.
*
* Written by Steve Deering, Stanford University, February 1989.
*/
#include <err.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
int
main( argc, argv )
int argc;
char **argv;
{
int so;
char line[80];
char *lineptr;
struct ip_mreq imr;
struct ifreq ifr;
int n, f;
unsigned i1, i2, i3, i4, g1, g2, g3, g4;
unsigned e1, e2, e3, e4, e5, e6;
if( (so = socket( AF_INET, SOCK_DGRAM, 0 )) == -1)
err( 1, "can't open socket" );
printf( "multicast membership test program; " );
printf( "enter ? for list of commands\n" );
while( fgets( line, 79, stdin ) != NULL )
{
lineptr = line;
while( *lineptr == ' ' || *lineptr == '\t' ) ++lineptr;
switch( *lineptr )
{
case '?':
{
printf( "%s%s%s%s%s%s%s",
" j g.g.g.g i.i.i.i - join IP multicast group \n",
" l g.g.g.g i.i.i.i - leave IP multicast group \n",
" a ifname e.e.e.e.e.e - add ether multicast address \n",
" d ifname e.e.e.e.e.e - del ether multicast address \n",
" m ifname 1/0 - set/clear ether allmulti flag \n",
" p ifname 1/0 - set/clear ether promisc flag \n",
" q - quit \n\n" );
break;
}
case 'j':
{
++lineptr;
while( *lineptr == ' ' || *lineptr == '\t' ) ++lineptr;
if( (n = sscanf( lineptr, "%u.%u.%u.%u %u.%u.%u.%u",
&g1, &g2, &g3, &g4, &i1, &i2, &i3, &i4 )) != 8 )
{
printf( "bad args\n" );
break;
}
imr.imr_multiaddr.s_addr = (g1<<24) | (g2<<16) | (g3<<8) | g4;
imr.imr_multiaddr.s_addr = htonl(imr.imr_multiaddr.s_addr);
imr.imr_interface.s_addr = (i1<<24) | (i2<<16) | (i3<<8) | i4;
imr.imr_interface.s_addr = htonl(imr.imr_interface.s_addr);
if( setsockopt( so, IPPROTO_IP, IP_ADD_MEMBERSHIP,
&imr, sizeof(struct ip_mreq) ) == -1 )
warn( "can't join group" );
else printf( "group joined\n" );
break;
}
case 'l':
{
++lineptr;
while( *lineptr == ' ' || *lineptr == '\t' ) ++lineptr;
if( (n = sscanf( lineptr, "%u.%u.%u.%u %u.%u.%u.%u",
&g1, &g2, &g3, &g4, &i1, &i2, &i3, &i4 )) != 8 )
{
printf( "bad args\n" );
break;
}
imr.imr_multiaddr.s_addr = (g1<<24) | (g2<<16) | (g3<<8) | g4;
imr.imr_multiaddr.s_addr = htonl(imr.imr_multiaddr.s_addr);
imr.imr_interface.s_addr = (i1<<24) | (i2<<16) | (i3<<8) | i4;
imr.imr_interface.s_addr = htonl(imr.imr_interface.s_addr);
if( setsockopt( so, IPPROTO_IP, IP_DROP_MEMBERSHIP,
&imr, sizeof(struct ip_mreq) ) == -1 )
warn( "can't leave group" );
else printf( "group left\n" );
break;
}
case 'a':
{
struct sockaddr_dl *dlp;
unsigned char *bp;
++lineptr;
while( *lineptr == ' ' || *lineptr == '\t' ) ++lineptr;
if( (n = sscanf( lineptr, "%s %x.%x.%x.%x.%x.%x",
ifr.ifr_name, &e1, &e2, &e3, &e4, &e5, &e6 )) != 7 )
{
printf( "bad args\n" );
break;
}
dlp = (struct sockaddr_dl *)&ifr.ifr_addr;
dlp->sdl_len = sizeof(struct sockaddr_dl);
dlp->sdl_family = AF_LINK;
dlp->sdl_index = 0;
dlp->sdl_nlen = 0;
dlp->sdl_alen = 6;
dlp->sdl_slen = 0;
bp = LLADDR(dlp);
bp[0] = e1;
bp[1] = e2;
bp[2] = e3;
bp[3] = e4;
bp[4] = e5;
bp[5] = e6;
if( ioctl( so, SIOCADDMULTI, &ifr ) == -1 )
warn( "can't add ether address" );
else printf( "ether address added\n" );
break;
}
case 'd':
{
struct sockaddr_dl *dlp;
unsigned char *bp;
++lineptr;
while( *lineptr == ' ' || *lineptr == '\t' ) ++lineptr;
if( (n = sscanf( lineptr, "%s %x.%x.%x.%x.%x.%x",
ifr.ifr_name, &e1, &e2, &e3, &e4, &e5, &e6 )) != 7 )
{
printf( "bad args\n" );
break;
}
dlp = (struct sockaddr_dl *)&ifr.ifr_addr;
dlp->sdl_len = sizeof(struct sockaddr_dl);
dlp->sdl_family = AF_LINK;
dlp->sdl_index = 0;
dlp->sdl_nlen = 0;
dlp->sdl_alen = 6;
dlp->sdl_slen = 0;
bp = LLADDR(dlp);
bp[0] = e1;
bp[1] = e2;
bp[2] = e3;
bp[3] = e4;
bp[4] = e5;
bp[5] = e6;
if( ioctl( so, SIOCDELMULTI, &ifr ) == -1 )
warn( "can't delete ether address" );
else printf( "ether address deleted\n" );
break;
}
case 'm':
{
++lineptr;
while( *lineptr == ' ' || *lineptr == '\t' ) ++lineptr;
if( (n = sscanf( lineptr, "%s %u", ifr.ifr_name, &f )) != 2 )
{
printf( "bad args\n" );
break;
}
if( ioctl( so, SIOCGIFFLAGS, &ifr ) == -1 )
{
warn( "can't get interface flags" );
break;
}
printf( "interface flags %x, ", ifr.ifr_flags );
fflush( stdout );
if( f ) ifr.ifr_flags |= IFF_ALLMULTI;
else ifr.ifr_flags &= ~IFF_ALLMULTI;
if( ioctl( so, SIOCSIFFLAGS, &ifr ) == -1 )
warn( "can't set" );
else printf( "changed to %x\n", ifr.ifr_flags );
break;
}
case 'p':
{
++lineptr;
while( *lineptr == ' ' || *lineptr == '\t' ) ++lineptr;
if( (n = sscanf( lineptr, "%s %u", ifr.ifr_name, &f )) != 2 )
{
printf( "bad args\n" );
break;
}
if( ioctl( so, SIOCGIFFLAGS, &ifr ) == -1 )
{
warn( "can't get interface flags" );
break;
}
printf( "interface flags %x, ", ifr.ifr_flags );
fflush( stdout );
if( f ) ifr.ifr_flags |= IFF_PROMISC;
else ifr.ifr_flags &= ~IFF_PROMISC;
if( ioctl( so, SIOCSIFFLAGS, &ifr ) == -1 )
warn( "can't set" );
else printf( "changed to %x\n", ifr.ifr_flags );
break;
}
case 'q': exit( 0 );
case 0:
case '\n': break;
default:
{
printf( "bad command\n" );
break;
}
}
}
return(0);
}