buglwIP - A Lightweight TCP/IP stack - Bugs: bug #42885, nd6_reachability_hint() accepts an...

 
 

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bug #42885: nd6_reachability_hint() accepts an address of an unknown neighbour

Submitted by:  Philipp Tölke <philipptoelke>
Submitted on:  Thu 31 Jul 2014 10:13:35 AM UTC  
 
Category: IPv6Severity: 3 - Normal
Item Group: Faulty BehaviourStatus: Fixed
Privacy: PublicAssigned to: Ivan Delamer <idelamer>
Open/Closed: ClosedPlanned Release: None
lwIP version: git head

Wed 18 Mar 2015 06:21:14 PM UTC, comment #1:

Yes, I agree that was a misuse of that function, but I'll add the patch as a safety.

thanks

Ivan Delamer <idelamer>
Project MemberIn charge of this item.
Thu 31 Jul 2014 10:13:35 AM UTC, original submission:

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".

Philipp Tölke <philipptoelke>

 

Attached Files

 

Depends on the following items: None found

Items that depend on this one: None found

 

Carbon-Copy List
  • -unavailable- added by idelamer (Posted a comment)
  • -unavailable- added by philipptoelke (Submitted the item)
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    Follow 4 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Wed 18 Mar 2015 06:21:14 PM UTCidelamerStatusNone=>Fixed
      Assigned toNone=>idelamer
      Open/ClosedOpen=>Closed
    Thu 31 Jul 2014 10:13:35 AM UTCphilipptoelkeAttached File-=>Added 0001-do-not-accept-reachability-from-unknown-neighbours.patch, #31806

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