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Date: Tue, 08 Oct 1996 22:47:01 -0500
From: Isidoro Liendo <ilv@coatepec.uaemex.mx>
Organization: Universidad Autonoma del Estado de Mexico
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Subject: Interrupts and ipintr
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Hi...

I'am trying to figure out how does FreeBSD "register" the function
ipintr so that whenever a network interrupt occurs it "knows" that
the funtion to be call is precisly ipintr (if the packets that arrived
is and IP packet of course). I have read the code and I found a call
to NETISR_SET(NETISR_IP,ipintr) in the file ip_input.c. 

Does this call "register" ipintr as the function to be called during the
interrupt? 

I also have "followed" this macro to DATA_SET and the to MAKE_SET after 
which something called "asm()" is called. Could anybody explain me what
does this function does?

I appreciate the time you spent reading this email...

Thank you very much....