[90] in linux-net channel archive
Re: tcp_data bug acked < copied - still in 1.1.88
daemon@ATHENA.MIT.EDU (Johannes Stille)
Wed Feb 15 02:52:28 1995
Date: Tue, 14 Feb 95 04:17 MET
From: johannes@titan.westfalen.de (Johannes Stille)
To: johannes@titan.westfalen.de, okir@monad.swb.de
Cc: linux-net@vger.rutgers.edu
Olaf Kirch wrote:
>Johannes Stille wrote:
>: -If the destination address in the redirect message is a subnet address
>: (with a non-zero subnet part, and the remaining host part zeroed), then
>: we're in trouble: There is no way to know the netmask.
>
>I'm just being curious: isn't that what the ICMP Address Request Message
>is for? Or is it just not wide-spread enough to be of any use?
No, it isn't meant for this. It is meant for finding out the subnet
mask of the LAN we're immediately connected to.
Since this (AFAIK) usually is done in other ways (configuration file or
maybe BOOTP?), it probably is not well supported.
And it really can't be used for this purpose, as there is no way to get
the address of a router supporting this ICMP request from the address
in the ICMP redirect request (the latter might contain a subnet
address).
Johannes
