Alwyn Goodloe wrote:
> I need to use Router Alert (rfc2113)
> (http://www.phys-iasi.ro/Library/RFCs/rfc2113.htm)
>
> * Is there any documentation for using Router Alert in the FreeBSD
> environement.
> * Are there specific options that the Kernel must be compiled with?
> * I know in Linux there is a IP_ROUTER_ALERT option that can be applied by
> Root users to IP sockets to intercept all forwarded packets with the
> Router Alert option. Does it work similarly for FreeBSD.
Router alert is supported only in IPv6.
Take a look at usr.sbin/{pim6sd,pim6dd} for how to use it.
The advanced socket API for IPv6 router alert option is defined in
http://www.ietf.org/internet-drafts/draft-ietf-ipngwg-rfc2292bis-02.txt
There's no standard API for IPv4, though.
-Kenjiro
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