On Sun, 30 Mar 2003, R. Joseph Newton wrote:
> "Scott R. Godin" wrote:
>
> > .... I think it probably would be better to quote the entire parameter
> > > list for perl, but it did run fine once the call to the non-existent
> > > bind() function was commented out.
> >
> > non-existent? since when?
> >
> > perldoc Net::Ping
> >
> > $p->bind($local_addr);
> > Sets the source address from which pings will be sent. This must
[snip]
> > ping() for that object.
>
> You are right. It is there. OTOH, that does not mean that it is a good
> idea to use it. In the way that ramprasad was using it, the code
> assumed the interface IP to be static. Now, I don't know the innards of
> his LAN, but the IP used sure looks like one dished up by DHCP. Most of
> the hosts list also look like DHCP. Those would not hang the process,
> though; they would only return 0 from the ping() call.
>
> So, whether the function exists or not, it should probably not be used
> unless there is a very specific reaswon why it needs to be. If you scan
> through the synopsis for the module, you may notice that it is not even
> mentioned.
>
Without debating the possible usefulness of it when set improperly by
inexperienced coders, In Net::Ping 2.28 which I have installed here, and
which appears to be the most recent version available from CPAN, the bind()
call certainly SEEMS to be mentioned in the Synopsis in the 6th line (of
code) into it.
Observe:
SYNOPSIS
use Net::Ping;
$p = Net::Ping->new();
print "$host is alive.\n" if $p->ping($host);
$p->close();
$p = Net::Ping->new("icmp");
-> $p->bind($my_addr); # Specify source interface of pings
foreach $host (@host_array)
{
print "$host is ";
etc, etc, etc,
/me wanders off whistling to the sound of one pin, dropping.
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