Bug 2083

Summary:	BridgeNetDevice may send corrupted packets
Product:	ns-3	Reporter:	Tommaso Pecorella <tommaso.pecorella>
Component:	bridge	Assignee:	Gustavo J. A. M. Carneiro <gjcarneiro>
Status:	RESOLVED FIXED
Severity:	normal	CC:	ns-bugs
Priority:	P5
Version:	ns-3-dev
Hardware:	All
OS:	All
Attachments:	fix

Description Tommaso Pecorella 2015-03-25 11:55:32 UTC

How is it possible that nobody did notice before ?

When the BridgeNetDevice sends a packet, it may forward it to all the interfaces. When this happens, the packet is re-used. As a consequence, if an interface modifies the packet (e.g., by adding an header), the next interface will have a corrupted packet.

As a side note, the wifi-wired-bridging examples has wrong IP numbers in the figure.

Comment 1 Tommaso Pecorella 2015-03-25 11:58:51 UTC

Created attachment 2001 [details]
fix

Comment 2 Tommaso Pecorella 2015-03-25 12:01:59 UTC

Pushed in changeset:   11237:77e2228781ac

Forgot to mention that the bug was found by Red Zhaoyj here:
https://groups.google.com/forum/#!topic/ns-3-users/bWtPoLMXUeY