Neale Ferguson writes:
> We have our system up to the stage where we can starting doing some
> networking stuff. ifconfig lo0 sets up our loopback device. When we ping
> 127.0.0.1 we never get a response. I've been able to verify that ping
> successfully executes the sendto() call and is now waiting on the pollsys
> syscall. I have verified that the ip module is doing things but I'd like to
> use dtrace to see exactly what it is up to. Either the packet gets lost or
> the signal to tell pollsys() that there's some data for it is going screwy or
> something else entirely.
>
> Is it possible to setup dtrace to let me see what is happening and if so can
> you give me an example of the dtrace script to use?
I see that you've already solved your problem, but to close the loop,
here's a dtrace script that will show you what IP is doing when ping
sends a packet.
(In general, you'll probably want to contact either the Dtrace or
Networking communities with questions like this one.)
#!/usr/sbin/dtrace -Fs -
syscall::sendto:entry
/execname == "ping"/
{
self->trace = 1;
}
fbt:ip::
/self->trace/
{
}
syscall::sendto:return
/self->trace/
{
self->trace = 0;
}
--
James Carlson, Solaris Networking <[EMAIL PROTECTED]>
Sun Microsystems / 35 Network Drive 71.232W Vox +1 781 442 2084
MS UBUR02-212 / Burlington MA 01803-2757 42.496N Fax +1 781 442 1677
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