Re: tshark: Difference between -R and -Y

[Evan Huus <eapache () gmail com>]

On Tue, Jan 7, 2014 at 7:22 PM, Joerg Mayer <jmayer () loplof de> wrote:
> On Sun, Jan 05, 2014 at 07:30:04PM -0500, Evan Huus wrote:
> > Live capture with two-pass dissection is effectively undefined
> > behaviour at this point (I'm surprised you're seeing any packets at
> > all to be honest).
>
> Ah, OK. As some "invalid" cases (-R without -2) are rejected I expected
> that this was a valid combination.

Whoops. I added an explicit error message in r54643.

Evan

> > Everything should work as expected when reading from a capture file.
>
> It does.
>
> Thanks!
>     Jörg
>
> > On Sun, Jan 5, 2014 at 4:21 PM, Joerg Mayer <jmayer () loplof de> wrote:
> > > I just found out that I don't understand what -R does.
> > >
> > > If I run
> > > tshark -2 -R "udp.port==53" -i wlan0
> > > then it seems that I see all packets (arp, dns, lldp, ...)
> > > if I instead run
> > > tshark -2 -Y "udp.port==53" -i wlan0
> > > I only see dns.
> > > The manpage is not helpful either to explain what I am seeing
> > > (snv HEAD / r54612)
> > >
> > > Can someone please explain what is going on here?
>
> --
> Joerg Mayer                                           <jmayer () loplof de>
> We are stuck with technology when what we really want is just stuff that
> works. Some say that should read Microsoft instead of technology.
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