[CUWiN-Dev] Routing private IP's

[Matthew Isaacs]

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I've been looking into the issue of zebra/hsls exposing routes to
private networks on the wired interfaces.  The issue is in the isprivate
command (located in src/ipschema/isprivate).  No matter what IP you pass
it, it returns that it is a public address.  Inspecting the code reveals
some byte-ordering issues.  These should be easy to fix.  An alternative
would be a shell script similar to the one following this message.  The
script is significantly smaller than the program (~300 bytes vs 4K).
Thoughts?

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#!/bin/sh

# determine whether a given IP is public or private

O1=$(echo $1 | cut -d "." -f 1 )
O2=$(echo $1 | cut -d "." -f 2 )

if [ "$O1" -eq "10" ]; then
        exit 0
elif [ "$O1" -eq "172" ] && [ "$O2" -ge "16" ] && [ "$O2" -le "31" ]; then
        exit 0
elif [ "$O1" -eq "192" ] && [ "$O2" -eq "168" ]; then
        exit 0
else
        exit 1
fi
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