[Rxtx] Re: mac serial sniffing ?
tjarvi at qbang.org
Thu Oct 20 00:08:12 MDT 2005
On Thu, 20 Oct 2005 pbarthelemy at aim.com wrote:
>> for Windows, I suggest using a tool called PortMon.
>> It is freely available from
> Further research on mac serial sniffing have lead me to :
> Serial Port Tool : http://www.versiontracker.com/dyn/moreinfo/macosx/24024
> Portterm : http://kulesh-software.com/Software/PortTerm/
> In my case, both are fall short of what I need : I need something on par with
> PortMon, the soft you pointed me to...
Years ago when I wanted to reverse engineer the Garmin GPS protocol, I
just made a custom cable. I split the rx and tx and sent them to com2
and com2. I could then see everything.
computer1 --------------------------> computer2
Computer3 COM1 <------- |
A couple of years after I did that (which was why I started rxtx) I found
Sun engineers had done a better job in their playground. It did work
With the above, you see everything and don't have to worry. You cant read
a port and leave the data there. The obove sends a copy to each computer
getting around reading the uart and leaving the data. Observing the
port is going to need a virtual device or hacking or overriding
libc/windows dlls while using 3rd party software. Or the above.
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