[dsc] dsc v2.13.0 released!

Jerry Lundström jerry at dns-oarc.net
Mon Jan 31 15:13:46 UTC 2022

Hi all,

This release fixes a huge performance issue with hashing IPv6 addresses, 
adds support for new DNSTAP messages types and protocols, and adds two 
new indexers.


Packages are available at: <https://dev.dns-oarc.net/packages/>

Thanks to a patch sent in by Ken Renard (@kdrenard) a rather huge 
performance issue related to hashing IPv6 addresses has been solved.
Old code used a very incorrect assumption about addresses in general and 
while same way was used for IPv4, it didn't hit as hard as it did for IPv6.
New code uses hashing functions on both address types and to quote the 
GitHub issue (by Ken):
-"This performs about 5% better than what I did (51 sec versus 54 sec)
   for 5GB pcap file with nearly 50/50 split of IPv4 and IPv6 (3.7M/3.5M
   v4/v6 queries).
   Old inXaddr_hash() has been running for 75 minutes and is about 20%
   done. I say this is a winner!"

Many thanks to Ken for pointing this out and supplying a patch!

DSC now depends on dnswire v0.3.0 which includes new DNSTAP messages 
types and protocols that was recently added to DNSTAP's Protobuf definition.
The new `UPDATE_QUERY` and `UPDATE_RESPONSE` messages types are now 
supported and are interpret as `AUTH_QUERY` and `AUTH_RESPONSE`.
The new socket protocols for DOT, DOH and DNSCrypt are also supported 
and are interpret as TCP for indexers such as `ip_proto` and 
`transport`. To get stats on the encryption itself you can use the new 
indexer `encryption`.

Two new indexers have been added:
- `label_count`: Number of labels in the QNAME
- `encryption`: Indicates whether the DNS message was carried over an
   encrypted connection or not, and if so over which. For example
   "unencrypted", "dot" (DNS-over-TLS), "doh" (DNS-over-HTTPS).

Other changes:
- `inX_addr`: Rework structure, separate IPv4 and IPv6 addresses
- Fix some DNSTAP tests
- `transport_index`: Fix typo in code documentation

37df703 DNSTAP update, encryption indexer
d27171f Label count indexer
6932247 Adding labellen indexer which counts the number of labels in a 
DNS message
68cc9c7 New IP hashing


More information about the dsc mailing list