Hi.
I have just posted a script at http://www.bruningsystems.com/rtlsio.p
that allows one to snoop incoming/outgoing packets on a Realtek NIC.
The script is very easy to change for any other GLD-based NIC (see
the comment at the beginning of the script to determine what needs
to be changed.)
To run the script, save it and then:
# dtrace -q -C -s ./rtlsio.p
Let me know what you think.
max
Tuesday, April 05, 2005
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2 comments:
Interesting script.. I noticed in your comments you wanted a way to print out the payload. This is easily done with the tracemem() function.
Here's a short script I call mblk.d, which takes a function name as the first arg, and an argument place as the second. Only shows 48 bytes, but that's configurable.. Usage:
# mblk.d ip_rput arg1
#!/usr/sbin/dtrace -Fs
$1:entry
{
mp = (mblk_t *) $2;
tracemem(mp->b_rptr, 48);
}
It's very handy to debug :)
Thanks Yuzo!
To print the entire data,
use:
tracemen(mp->b_rptr, mp->b_wptr-mp->b_rptr);
max
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