[scamper-announce] scamper-cvs-20250729

[Matthew Luckie]

https://www.caida.org/catalog/software/scamper/code/scamper-cvs-20250729.tar.gz

SHA256 (scamper-cvs-20250729.tar.gz) = 153c0580ab4bf96549d62d3c49e6faa82708e7da6f877dadb15c8cf89c8648dd
SIZE (scamper-cvs-20250729.tar.gz) = 3260686

scamper:
* remove unused msec parameter from scamper_task_queue_done, remove
  scamper_task_queue and scamper_task_queue_wait, removing unnecessary
  gettimeofday calls.
* rename time-based variables in event loop after their use to
  make it more obvious what is going on
* fix json rendering of pmtud traceroutes with a host-connected MTU
  mismatch

throughout:
* switch to mostly timeval-based math to avoid division operations,
  remove some timeval functions, add others (mul, div)
* implement branchless comparison functions for address and time
  comparison
* speed up ipv4_prefix, ipv4_prefixhosts scamper_addr implementations
* simplify string_nullterm and string_nullterm_char according to how
  they are used in practice
* add slist_node_iter and dlist_node_iter functions to optimise a
  common code pattern
* add slist_to_dlist, dlist_to_slist, splaytree_to_slist, and
  splaytree_to_dlist to reduce repeated code
* silence warnings and errors when compiling with gcc 2.95

tests:
* add unit tests for string_nullterm and string_nullterm_char
* expand timeval math tests by adding add, diff, inrange, mul, div
  tests, and more sub tests
* expand scamper_addr tests to include cmp, human_cmp,
  prefix, first-bit-diff, and prefixhosts
* expand trace tests to include a pmtud traceroute with a
  host-connected MTU mismatch

Python module:
* make ScamperIcmpExts.ext_count be an attribute, consistent with
  documentation
* make ScamperTracelbNode near, far, length be attributes rather than
  methods, consistent with documentation
* fix sync=True do_* code paths
* install scamper.pyi file alongside the compiled python module to
  allow for static type checking analysis with mypy, and for code
  completion in vscode

hoiho:
* learn ASN regexes where the operator controlling the PTR record uses
  a prefix on the hostname (e.g., ^ipv4.de-cix.)

documentation:
* complete trace and ping warts(5) format descriptions

libscamperfile:
* bump revision because implementation (but not API) changed
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