On Jun 9, 2011, at 10:22 PM, rajath kumara wrote:
> I am working with ostinato for past 1 week, and found it great.
By "ostinato" do you mean
http://code.google.com/p/ostinato/
?
> currently i'm facing problems with port numbering, right now i have 6
> ports( 4 D-link ethernet adapters and 2 Netgear , Ethernet PCI
> adapter ) . when i connect cables , ports are getting connected ( im
> able to transmit, receicve the frames ), but problem is, I'm not able
> to figure out the way port numbers are assigned.
>
> for example , like i mentioned i have 6 ports now, when i connect a
> cable to last port , port 3 is activated, if i connect cable to 1st
> port in my system, port 2 gets activated in ostinato.
The page says
Runs on Windows, Linux, BSD and Mac OS X (Will probably run on other
platforms also with little or no modification but this hasn't been tested)
libpcap/WinPcap do not have any notion of "port numbers" for network adapters.
tcpdump/WinDump do, but all they're doing is getting a list of network adapters
from libpcap/WinPcap and using ordinal numbers in that list. I don't know
whether that's what Ostinato is doing or not.
The list of network adapters libpcap/WinPcap supplies is, except for loopback
adapters on those platforms where libpcap supports them, in the order in which
the OS supplies them to libpcap or whatever order the WinPcap driver gets them
from the OS. (Loopback adapters are sorted to the end of the list.)
There is no simple rule to determine the order for the list the OS supplies.
This list:
http://www.iniqua.com/wp-content/uploads/2010/12/ihaveadream.png
is on a Mac OS X machine; the first interface is the built-in Ethernet, the
second interfaces is the FireWire adapter, the next three are probably add-on
Ethernets, and the last one is the loopback adapter. On my Mac, also running
OS X, the list is en0, fw0, ppp0, utun0, en1, lo0, with the build-in Ethernet
first, the FireWire adapter second, a PPP adapter for my VPN connection to work
third, a tunnel interface of some sort fourth, the AirPort Wi-Fi adapter fifth,
and the loopback adapter last. If I disconnect the VPN, the list changes to
en0, fw0, utun0, en1, lo0.-
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