[scamper-announce] scamper-cvs-20250505

[Matthew Luckie]

https://www.caida.org/catalog/software/scamper/code/scamper-cvs-20250505.tar.gz

SHA256 (scamper-cvs-20250505.tar.gz) = f0a8b976dded0cd033e959c3bd2d80635b06248c5a41a15e888fb382748903a9
SIZE (scamper-cvs-20250505.tar.gz) = 3237527

scamper:
* trace: separate probes from replies
* trace: support -P tcp-ack Path MTU probing
* trace: support -N squeries with Path MTU probing
* trace: embed path MTU probing data in JSON output
* ping: add -O dltx option to force datalink tx, capture nhmtu in
  ICMP PTB messages
* add basic sysctl-like configuration file support, which currently
  only allows for disabling measurement primitives, e.g.:
  # disable udpprobe measurement primitive
  udpprobe.enable=0
* hopefully fix build on solaris

libscamperfile:
* chase separation of traceroute probes from replies, add
  scamper_trace_hopiter_* to simplify required user code
  modifications.
* fix 20250227 regression that did not read ipid32 in ping replies
  correctly, which lead to speedtrap not working.
* fix udpprobe warts storage when no packets are sent.
* be defensive allocating memory in warts read path.
* be defensive with possible null pointers when generating json from
  malformed warts.
* bump libscamperfile version.

Python module:
* include setup.py in source code distribution.
* transparently handle separation of traceroute probes from replies.
* extend do_ping to support MTU probing, and capture embedded nhmtu.

tests:
* replace unit_host_warts, unit_http_warts, unit_ping_warts,
  unit_trace_warts, unit_udpprobe_warts, with unit_warts.
* expand ping warts unit tests to check ipid values.
* expand trace warts unit tests to include last ditch probing, and
  path mtu discovery.
* add udpprobe and dealias warts unit tests.
* add fuzz_warts2json.
* add simple unit tests for parsing scamper configuration file.

throughout:
* chase libscamperfile modifications throughout bundled utilities.
* use string_concatc in all obvious places, reduce use of
  string_concaf further, speeding up string rendering.
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