I actualy make some network discovery scripts.During my work i get into the following Problem. I need to send ICMP Timestamp requests to the broadcast address of the network.

NetRawIP dont got this possibility because the SO_BROADCAST flag must be set on the socket, otherwise it is not possible to send it to the broadcast. I did then start doing a normal perl socket program. It looks now like this: 

use Socket;

socket (S,PF_INET,SOCK_RAW,getprotobyname('icmp')) or die "socket: $!\
+n";

setsockopt (S, SOL_SOCKET, SO_BROADCAST,1) or die "setsocket: $!\n";

$magic = '17';

defined(send(S,$magic,0,sockaddr_in(0x2ffff,INADDR_BROADCAST)))
 or print "send: $!\n";

close (S);

[download]
it sends icmp ...wow thats working :-) but not corectly, because the $magic, this must be a correct icmpheader etc. i can find anything bout that in perl. Please, can you try to help me.

Greetings
Max
mmo@phase1.ch

Edit kudra, 2001-10-25 Added some markup; removed extra newlines in code

In reply to Perl ICMP Sockets icmphrd by Anonymous Monk

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