Jacob B Schwartz: more click

[Eddie Kohler]

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To: eddietwo at MIT.EDU
Subject: more click
Date: Wed, 17 May 2000 15:18:07 -0400
From: Jacob B Schwartz <quark at MIT.EDU>


Also, what is this line doing in the ICMP Error code:
    ((struct icmp_redirect *) icp)->gateway = p->dst_ip_anno().saddr();

It's setting the gateway field in the redirect ICMP packet that's
going out.  But where does that gateway address come from?
Hrm, so I see that the gateway is the result of the lookupIPRoute,
only--in my examination of the click LookupIPRoute--the result is
to decide which device to send the packet out on, but not to actually
encode in the packet the IP of any gateway on that device.  I don't
see this info in the config file.  How does LookupIPRoute know the
IP's of the gateways?

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