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[lwip-devel] [bug #29478] AutoIP can assign nonconformant IP addresses


From: Bill Auerbach
Subject: [lwip-devel] [bug #29478] AutoIP can assign nonconformant IP addresses
Date: Thu, 08 Apr 2010 17:08:39 +0000
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 (.NET CLR 3.5.30729)

URL:
  <http://savannah.nongnu.org/bugs/?29478>

                 Summary: AutoIP can assign nonconformant IP addresses
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: billauerbach
            Submitted on: Thu 08 Apr 2010 01:08:39 PM EDT
                Category: None
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: CVS Head

    _______________________________________________________

Details:

This bug report possibly could be more of an RFC clarification than an actual
bug.

AutoIP can assign 169.254.0.0 to 169.254.0.255.  Throughout RFC 3927 it does
mention "169.254/16" to indicate all 65536 addresses in the 169.254 subnet,
but notice that section 2.1 states:

"When a host wishes to configure an IPv4 Link-Local address, it selects an
address using a pseudo-random number generator with a uniform distribution in
the range from 169.254.1.0 to 169.254.254.255 inclusive."

This implies that 169.254.0.0 to 169.254.0.255 are not valid link local
addresses.

Thoughts?




    _______________________________________________________

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  <http://savannah.nongnu.org/bugs/?29478>

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