Bug 197 – Fragmentation bug

Bug 197 - Fragmentation bug

Summary:

Fragmentation bug

Status:	RESOLVED FIXED

Product:	ns-3
Component:	simulation core
Version:	pre-release
Platform:	All All

Importance:	P3 normal
Assigned To:	ns-bugs

URL:
Keywords:

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2008-05-30 14:07 EDT by Sebastien Vincent
Modified:	2008-07-01 13:32 EDT (History)

Attachments
Test-case to reproduce the bug (4.39 KB, text/x-patch) 2008-05-30 14:07 EDT, Sebastien Vincent	Details
Add an attachment (proposed patch, testcase, etc.)

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Description From Sebastien Vincent 2008-05-30 14:07:22 EDT

When we send packet fragments (created by packet->CreateFragment()), it
occurred a problem ("assert failed. file=../src/common/packet-metadata.cc,
line=436, cond="m_used != prev && m_used != next") when the receiver try to
reassemble the fragment. Note that the receiver reassembles when all the
fragments are here.

In the test-case patch, we modify the udp-echo-client and udp-echo-server
application in order to send fragment packet for client-side and reassemble
them for server-side. In fact we found this bug by implementing the IPv6
fragmentation extension.

------- Comment #1 From Sebastien Vincent 2008-05-30 14:07:54 EDT -------

Created an attachment (id=143) [details]
Test-case to reproduce the bug

------- Comment #2 From Mathieu Lacage 2008-05-31 17:17:23 EDT -------

bug fixed in: http://code.nsnam.org/mathieu/ns-3-bug197 changeset fc396ecaf512

Will be merged after next release on tuesday or wednesday.