> A few things.. why is ip.h not part of the linux/include/net rather than
> linux/include/linux hierachy?
Because it needs to be user visible for raw sockets (linux is exported to the user,
> Defined items that are not used anywhere in the source..
> Can any of them be deleted now?
nope. they can be useful for the user.
> Also, I was looking into some RFC 1812 stuff. (Thanks for nothing Dave :) and
> was looking at 22.214.171.124 where it mentions that a router MUST implement the End
> of Option List option.. Havent' figured out where that is implememented yet..
It is (see net/ipv4/ip_options:ip_options_compile())
> Also was trying to figure out some things.
> I want to create a new ip_option for use in some DOS protection experiments.
> I have a whole 40 bytes (+/-) to share... Now although I don't see anything
> explicitly prohibiting the use of unused IP Header option space, I know that
> it really was designed for use by the sending parties, and not routers in
> between.. Has anyone seen any RFC that explicitly says I MUST NOT?
Using IP options is strongly deprecated because it causes a lot of switches/routers
to go from hardware into software switch mode (-> it kills your gigabit routers)
They are implemented, just only implicitely as an array index.
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