topic Re: LAN Driver & promiscuous to capture outgoing & incoming traffic in Operating System - OpenVMS

LAN Driver & promiscuous to capture outgoing & incoming traffic

Ruslan R. Laishev — Fri, 21 Mar 2014 16:34:40 GMT

Hi There!

I have tried to use LAN Driver I/O interface to capturing packets from NIC.

I wrote some code and can receive only incomming network frames.

How to get a copy of the send frames? It's possible at all ?

Steven Schweda — Fri, 21 Mar 2014 20:08:26 GMT

Bob Blunt — Sat, 22 Mar 2014 05:45:54 GMT

Also remember that in modern ethernet switches you'll only be getting traffic coming to your specific port/address so

what you see (without proper switch setup) will be very limited. Some switches allow enabling a port for this, some don't.

Unless, of course, you're really using a traditional thick cable with taps and transceivers, DELNIs, repeaters, bridges and friends...

bob

Ruslan R. Laishev — Sat, 22 Mar 2014 06:47:32 GMT

Hello!

I expect that an ablity ot get a copy of outgoing packets is a feature the LAN Drive. Is not ?

Is there guru any from VMS/Networking Eng ?

Eberhard Heuser — Sat, 22 Mar 2014 13:10:33 GMT

Take a look into the pcap source code that comes with the simh vax emulator.

Hope this helps

Eberhard

Ruslan R. Laishev — Sun, 23 Mar 2014 07:56:35 GMT

Thanks!

Got the kit, looking into ... PCAP/VMS has been written with VCI ...

Why VCI still is not in the VMS docs ?!

Ruslan R. Laishev — Tue, 25 Mar 2014 10:41:18 GMT

After lot of work get to work small progs used PCA/VCI exclet from the PCAP-VMS Kit.

So, I still only see incomming packets.

Any other ideas ?