[radvd-devel-l] Questions on radvd codes.
pekkas at netcore.fi
Thu Sep 24 04:57:32 EDT 2009
These are pretty basic questions but hopefully this gets you started.
On Thu, 24 Sep 2009, Jong-Hyouk Lee wrote:
> 1. Where is codes used to update (modify) the routing information when RA messages arrived? Is it done by Linux kernel?
> So, radvd doesn't have such functions? I couldn't find out.
The RAs received by clients (for address autoconfiguration etc.) is
handled by the kernel or such.
Radvd also sees these RAs but only checks them for consistency
> 2. Radvd is used to send RA messages periodically even if there is no RS messages sent from neighbors. I just wanted to
> see the codes related to it (i.e., sending unsolicited RA messages periodically to neighbors in a broadcast manner). As
> I know, when radvd starts, it firsts sends RA messages by executing kickof_adverts(). Then, it goes into the loop
> (i.e., for(; ;)). Which places in the codes shall I look? I just want to see the related codes for sending unsolicited
> RA messages periodically to neighbors.
As you say, kickoff_adverts() is the critical piece where a timer is
scheduled for periodic RA. When the timers expire, it's
radvd.c:timer_handler() which gets called and the actual RA is sent
Pekka Savola "You each name yourselves king, yet the
Netcore Oy kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
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