[lwip-devel] [bug #42885] nd6_reachability_hint() accepts an address of an unknown neighbour

[Philipp Tölke]

URL:
  <http://savannah.nongnu.org/bugs/?42885>

                 Summary: nd6_reachability_hint() accepts an address of an
unknown neighbour
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: philipptoelke
            Submitted on: Thu 31 Jul 2014 10:13:35 AM GMT
                Category: IPv6
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: git head

    _______________________________________________________

Details:

In our application devices use multicast to discover each other.

We erroneously called nd6_reachability_hint() after successful communication
even when using multicast which can lead to an neighbour-cache entry being
made "REACHABLE" that has no valid LL-address.

While this clearly was our mistake, I propose the attached patch. It changes
nd6_reachability_hint() to only mark valid entries as "REACHABLE".



    _______________________________________________________

File Attachments:


-------------------------------------------------------
Date: Thu 31 Jul 2014 10:13:35 AM GMT  Name:
0001-do-not-accept-reachability-from-unknown-neighbours.patch  Size: 781B  
By: philipptoelke

<http://savannah.nongnu.org/bugs/download.php?file_id=31806>

    _______________________________________________________

Reply to this item at:

  <http://savannah.nongnu.org/bugs/?42885>

_______________________________________________
  Message sent via/by Savannah
  http://savannah.nongnu.org/