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WAND Group

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WAND is a research group at the University of Waikato Computer Science Department. The group is involved with a range of computer networks projects mostly focused around network measurement. The group has a strong international reputation and has close links, including collaborative research, with several other network measurement groups. These include CAIDA, Sprint and Agilent.

Our work includes collection of very long trace sets, network analysis and software to support this, active measurement systems, wireless networks for rural communities, rapid deployment networks, OS code based network simulation and network visualisation. Spinoffs from our work include Endace and Rural Link.

WAND Interesting Blogs

01

Jul

2019

Libtrace 4.0.8 has been released.

This release upgrades the traceanon tool to be able to anonymise various sensitive AVPs within RADIUS packets. We also now allow (and strongly recommend) the use of a YAML configuration file to configure traceanon -- the old CLI options will continue to work but should be considered deprecated.

This release also fixes a bug where ndag multicast clients would bind to all addresses for a given port, rather than just their specific address for their multicast group.

The full list of changes in this release can be found in the libtrace ChangeLog.

You can download the new version of libtrace from the libtrace website.

15

May

2019

Libtrace 4.0.7 has been released.

This release adds support for parsing meta-data records included in packet captures, including ERF provenance records or pcapng section headers. We've also extended the APIs for interacting with post-layer 2 headers such as VLAN and MPLS.

Support for reading and writing TZSP streams (such as those produced by Mikrotik RouterOS) has also been added.

There are also some minor bug fixes, as well as some performance enhancements for high packet rate parallel captures.

The full list of changes in this release can be found in the libtrace ChangeLog.

You can download the new version of libtrace from the libtrace website.

16

Jan

2019

Libtrace 4.0.6 has been released.

Once again, this release is primarily a collection of bug fixes and performance enhancements on top of libtrace 4.0.5.

Major changes in this release:
* Added ability to write pcapng trace files.
* Fixed segmentation fault when using tracereplay on certain packet types.
* Fixed bug where trace_event() API was ignoring all received packets.
* Fixed build issue when enabling DPDK.
* Fixed build issue where recvmmsg availability was not detected properly.
* Fixed packet corruption bug when using the "jump to IP header mode" in tracesplit.
* Better error messaging and handling -- no more unexpected assertion failures!
* Improved read performance of both ring: and ndag: live captures.
* traceends and tracetopends now use the parallel API.

The full list of changes in this release can be found in the libtrace ChangeLog.

You can download the new version of libtrace from the libtrace website.

09

Nov

2018

Libtrace 4.0.5 has been released.

This release is a collection of bug fixes and performance improvements for libtrace 4.0.4.

Major changes in this release:
* Fixed bug where only one client could subscribe to an nDAG multicast group concurrently.
* Fixed bad payload length calculations on outgoing packets when IP length field is populated by hardware.
* Fixed build error when compiling with DPDK support.
* Improved performance when decoding ETSI records via etsilive:
* Improved ERF / DAG packet processing performance by caching the framing length.

The full list of changes in this release can be found in the libtrace ChangeLog.

You can download the new version of libtrace from the libtrace website.

02

Jul

2018

Libtrace 4.0.4 has been released.

New features in this release include:
* Added reference counting API for keeping track of packets shared across multiple threads.
* Added new input format for receiving live streams of packets encoded using the ETSI LI standard.
* Libpacketdump can now also decode ETSI-encoded packets.
* Added CLI option to tracereplay to "speed up" replays by a given factor, i.e. set to 2 to replay at double speed.
* Added new trace_flush_output() API function to force a libtrace output to flush any buffered output.

There are also plenty of bug fixes in this release, including:
* Fixed problems with trying to have two ring: inputs active at the same time.
* Fixed missing subseconds in timestamps from pcapng: packets.
* Fixed bug that was causing poor ndag: performance.
* Fixed bug that prevented trace_pstop() from working correctly on some live inputs.
* tracereplay will now skip meta-data records rather than trying to replay them and failing.
* Fixed some buffer overrun issues in the pcapng reading code.

The full list of changes in this release can be found in the libtrace ChangeLog.

You can download the new version of libtrace from the libtrace website.

02

Mar

2018

Libtrace 4.0.3 has been released.

New features in this release include:
* A new capture format (dpdkndag:), which allows nDAG records to be intercepted and decoded using a DPDK interface.
* The message queue data structure API is now publicly exported, so can be used in user code.
* The toeplitz hasher data structure API is now publicly exported, so can be used in user code.
* Added a new API function: trace_get_perpkt_thread_id(), which will return the ID number of the running packet processing thread.
* Upgraded DAG code to use the 64 bit API, so libtrace will work with large streams.

The following bug fixes are also included:
* ERF provenance records will no longer cause libtrace to halt.
* Captures from GRE tunnel interfaces should now work correctly.
* Packets captured using DPDK will no longer lose any payload after the first 1024 bytes.
* Fixed a couple of nDAG packet corruption problems.
* Ensure all key fields are correctly initialised when doing DPDK output.
* Fixed assertion failure when libwandio has an unexpected error.

We've also further improved the performance of the nDAG format.

The full list of changes in this release can be found in the libtrace ChangeLog.

You can download the new version of libtrace from the libtrace website.

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