Re: rtentry and rtrequest

On Wed, Apr 18, 2007 at 11:50:09AM +1000, Alan Garfield wrote:
Hi all!

One word.... HOW! :)

I've no clue what this FreeBSD ARP stuff is all about, there is little
or no documentation, there are 14 different sock_addr's which seem to
have a bazillion different fields, and I cannot output a simple debug
statement without getting 'error: dereferencing pointer to incomplete
type' errors!

Sorry for the rant, I'm just frustrated. :) I've been going great on
this port, but now I've struck ARP and have been stuck for days and I
cannot seem to get myself out no matter how much kernel code I grep it
still all looks Greek to me.

I understand what ARP is and how it does it's thing. I even understand
how Linux does it, but I cannot get a handle on how/why FreeBSD does
what it does.

[...]

I just want an idea of the structures involved, and what I need to
implement to intercept and injecting a fake MAC so my buffer driver can
communicate with the other side without ARP errors.

Could you tell more details on the problem you are trying to solve
now. Sorry, but I fail to see what errors you get, and why. Doesn't
the Service Processor on the other side of that little Ethernet
link behave as a conventional IP host?

(Alan is writing a driver for the interface between the CPU and the
Service Processor found in Sun Fire. Of course, FreeBSD runs on
the CPU, while the SP executes a sort of Linux. The interface
mimics Ethernet, but I don't know what lengths it goes to in doing
so.)

--
Yar
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