Bug 966 – AODV originates new RREQ on each packet, when doesn't have valid route.

Bug 966 - AODV originates new RREQ on each packet, when doesn't have valid route.


Summary:	AODV originates new RREQ on each packet, when doesn't have valid route.

Status:	RESOLVED FIXED

Product:	ns-3
Classification:	Unclassified
Component:	aodv
Version:	pre-release
Hardware:	All All

Importance:	P5 normal
Assigned To:	Elena Buchatskaya

URL:
Keywords:

Depends on:
Blocks:	940
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Reported:	2010-07-26 23:37 EDT by Elena Buchatskaya
Modified:	2010-08-04 14:00 EDT (History)
CC List:	2 users (show)

See Also:

Attachments
test case (6.13 KB, text/x-c++src) 2010-07-26 23:37 EDT, Elena Buchatskaya	Details
proposed patch (749 bytes, patch) 2010-07-26 23:39 EDT, Elena Buchatskaya	Details \| Diff
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Description Elena Buchatskaya 2010-07-26 23:37:44 EDT

Created attachment 953 [details]
test case

The problem is that AODV in DeferredRouteOutput does not check that route is already looking for and always sends new RREQ. In accordance with RFC 3561:

"After broadcasting a RREQ, a node waits for a RREP (or other control message with current information regarding a route to the appropriate destination).  If a route is not received within NET_TRAVERSAL_TIME milliseconds, the node MAY try again to discover a route by broadcasting another RREQ."

Here is a test case, changing the example in src/routing/aodv.cc to use a UDP application instead of ICMP to generate more packets per second.

Comment 1 Elena Buchatskaya 2010-07-26 23:39:45 EDT

Created attachment 954 [details]
proposed patch

Comment 2 Elena Buchatskaya 2010-08-04 13:51:26 EDT

changeset 5dbb70a41b85