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Operating Systems Linux C, LKM, netfilter, PF_PACKET and ARP. Post 302494319 by fpmurphy on Sunday 6th of February 2011 11:55:24 PM
Old 02-07-2011
Yes, it is possible to do what you wish to do. How you do it depends on the particular platform you are on. If you are on Solaris, BSD or Mac OS-X, you would use the Berkeley Packet Filter (BPF). If you are on GNU/Linux you need to use Linux Socket Filter (LSF). Their APIs are totally different but fortunately LSF uses the BPF format syntax.

Have a look at the following post: Intercept ARP and ICMP ECHOREPLY Using LSF.
 

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getfrm(1F)							   FMLI Commands							getfrm(1F)

NAME
getfrm - returns the current frameID number SYNOPSIS
getfrm DESCRIPTION
getfrm returns the current frameID number. The frameID number is a number assigned to the frame by FMLI and displayed flush left in the frame's title bar. If a frame is closed its frameID number may be reused when a new frame is opened. getfrm takes no arguments. EXAMPLES
Example 1: A sample of the getfrm command. If a menu whose frameID is 3 defines an item to have this action descriptor: action=open text stdtext `getfrm` the text frame defined in the definition file stdtext would be passed the argument 3 when it is opened. NOTES
It is not a good idea to use getfrm in a backquoted expression coded on a line by itself. Stand-alone backquoted expressions are evaluated before any descriptors are parsed, thus the frame is not yet fully current, and may not have been assigned a frameID number. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5) SunOS 5.10 5 Jul 1990 getfrm(1F)
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