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New features

  • New option -J / --json for JSON output. See doc/fping-json.md for the JSON schema. This feature is still in alpha and the schema might change in future releases (#386, thanks @bonkf, @JoshIPT, @sebast-gsnw, and @auerswal).
  • The -g, --generate option now also supports IPv6 addresses (#376, thanks @auerswal)
  • New option --seqmap-timeout to control the time after which sequence numbers can be used again (#388, thanks @auerswal)

Bugfixes and other changes

  • Fix OpenBSD sprintf() warning (#394, thanks @gsnw-sebast)
  • Fix fallback to SO_TIMESTAMP if SO_TIMESTAMPNS is not available (#375, thanks @auerswal)
  • When reading target names from file or standard input, lines longer than the static buffer are no longer interpreted as more than one line (#378, thanks @auerswal)
  • Typo fix in error message when SO_BINDTODEVICE fails
  • Options --print-tos and --print-ttl now also work for IPv6, and no longer require privileges (#384, thanks @auerswal)
  • Report received ICMPv6 error messages (#391, thanks @auerswal)
  • Suppress duplicate reports in count mode with -q, --quiet or -Q, --squiet (#392, thanks @gsnw-sebast and @auerswal)
  • Switch to alpine-based multi-stage Docker build to reduce image size and improve build performance; add OpenContainers-compatible labels (#399, thanks @hoodadt)
  • Print receive ping moved to new functions (#400, thanks @gsnw-sebast)
  • Avoid unsigned overflow when determining the memory size to save response times on systems where size_t is the same as unsigned int (#412 by @auerswal)
  • Document the new minimum value for the -p option (#414, thanks @auerswal)
  • Fix build without IPv6 support (#416, thanks @auerswal)
  • Fix debug build use of dbg_printf in fping.c (#415, thanks @auerswal)
  • Remove MacOS-specific test for -I option (#407)
  • GitHub Actions fixes (thanks @gsnw-sebast)
  • Fix measurement of time for timed reports (-Q) to start after DNS name resolution.
  • Updated autoconf from 2.71 to 2.72
  • Updated automake from 1.16.5 to 1.18.1
  • Updated libtool from 2.4.6 to 2.5.4
  • Implemented verification of autotools tarballs in Github actions.
  • Implemented stricter flag value checking (e.g. -c 10xyz is not accepted anymore).
Source: README.md, updated 2025-12-31