Merge branch 'develop-eduard' into develop

This commit does not add tests that verify the exact limit,
because pinging 100000 localhost addresses takes over 15
minutes on my PC.  I have tested this fix manually.

.dockerignore

@@ -0,0 +1,30 @@
+.*.swp
+*.tar.gz
+*~
+src/*.gcno
+src/*.gcda
+src/*.gcov
+src/tags
+.deps
+Makefile
+Makefile.in
+aclocal.m4
+autom4te.cache
+compile
+config.guess
+config.h
+config.h.in
+config.log
+config.status
+config.sub
+configure
+depcomp
+install-sh
+missing
+src/*.o
+src/fping
+src/fping6
+stamp-h1
+doc/fping.8
+doc/fping6.8
+ci/build

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,67 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ develop ]
+  schedule:
+    - cron: '38 4 * * 3'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'cpp' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
+        # Learn more about CodeQL language support at https://git.io/codeql-language-support
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v2
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v2

.github/workflows/test.yml

@@ -0,0 +1,108 @@
+name: Test
+on: [push, pull_request]
+jobs:
+  Test-Linux:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-20.04, ubuntu-22.04]
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update -qq 
+          sudo apt-get install libcap2-bin libtest-command-perl lcov
+          sudo sysctl net.ipv4.ping_group_range='0 2147483647'
+
+      - name: Build
+        run: |
+          ci/build-1-autotools.sh
+          ci/build-4-compile.sh
+          ci/test-tarball.sh
+
+      - name: Test
+        run: |
+          set -ex
+          PATH=`pwd`/src:$PATH
+          # avoid pinging internet hosts because it doesn't
+          # work with GitHub Actions being hosted in Azure.
+          prove $(ls ci/test-*.pl|grep -v internet-hosts)
+          ci/run-lcov.sh
+
+      - name: Coveralls
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          path-to-lcov: lcov.info
+          flag-name: ${{ matrix.os }}
+          parallel: true
+
+
+
+  Test-Mac:
+    runs-on: macos-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install dependencies
+        run: |
+          brew install automake lcov
+          ci/build-2-test-command.sh
+          ci/build-3-prepare-macos.sh
+
+      - name: Build
+        run: |
+          ci/build-4-compile.sh
+
+      - name: Test
+        run: |
+          set -ex
+          PATH=`pwd`/src:$PATH
+          export SKIP_IPV6=1
+          prove $(ls ci/test-*.pl|grep -v internet-hosts)
+          ci/run-lcov.sh
+
+      - name: Coveralls
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          path-to-lcov: lcov.info
+          flag-name: macos
+          parallel: true
+
+  Coveralls-Finish:
+    needs: [Test-Linux, Test-Mac]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Coveralls
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          parallel-finished: true
+
+  Release-Tarball:
+    needs: [Test-Linux, Test-Mac]
+    if: ${{ github.event_name == 'push' }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update -qq 
+          sudo apt-get install libcap2-bin libtest-command-perl
+
+      - name: Build
+        run: |
+          ci/build-1-autotools.sh
+          ci/build-4-compile.sh
+          ci/test-tarball.sh
+
+      - uses: actions/upload-artifact@v2
+        with:
+          name: dist
+          path: fping-*.tar.gz

.gitignore

@@ -4,6 +4,7 @@
 src/*.gcno
 src/*.gcda
 src/*.gcov
+src/tags
 .deps
 Makefile
 Makefile.in

.travis.yml

@@ -1,40 +1,98 @@
-# travis-ci.org configuration
-# 
 language: generic
-sudo: required
-dist: trusty
+
+os:
+  - linux
+
+dist:
+  - trusty
+  - xenial
+
 env:
   global:
     - secure: "CoI8hwHH1yfQoQxIfWGRS0WfTyScox+5aJn0fDDgz2uKrrIxmBvIw/WKX8wcSiV6fLmLuwgNkKqSM3hdO4qaG+JxfWcuEiZZHm+kxSGMkWbGb/fvAI+gHg8ldKyYttcIX71O5rlZiC2QpNKQi2v18S6pI5p8eqnx7DYx4YrmguQ="
      # The next declaration is the encrypted COVERITY_SCAN_TOKEN, created
      #   via the "travis encrypt" command using the project repo's public key
     - secure: "C9ZJ9LYnuowRdF4D66KLfquimvu8GtRGIafwvCcGYKReEy8phlBdFsHlybkMBNYJNTJSM0j6wyo1lKTVGHxmpQDimjR7kmxUtawbhuJ5qOCBtFqNVh9lRQi7hC4+UOhvRsIcbV8HAJM5u/5RxGOfXCePK3a2DtiYv1d2NHToZN8="
+
+notifications:
+  webhooks: https://coveralls.io/webhook
+
 compiler:
   - gcc
-before_install:
-    - sudo apt-get update -qq
-    - sudo apt-get install libcap2-bin
-    #- sudo apt-get install traceroute
-    #- traceroute google.com
-    - echo -n | openssl s_client -connect scan.coverity.com:443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' | sudo tee -a /etc/ssl/certs/ca-
-install:
-    - ci/build-1-autotools.sh
-    - curl -L http://cpanmin.us | perl - --sudo App::cpanminus
-    - cpanm --sudo Test::Command
+
+addons:
+  apt:
+    update: true
+    packages:
+      - libcap2-bin
+      - libtest-command-perl
+    
 script:
-    - ci/build-2-install.sh
-    - env PATH=`pwd`/src:$PATH prove ci/test-*.pl
-    - ci/test-tarball.sh
+  - ci/build-4-compile.sh
+  - ci/run-tests.sh
+
 after_success:
-    - ci/coveralls.sh
+  - ci/deploy-coveralls.sh
+
+stages:
+  - test
+  - name: deploy
+    if: branch = master OR branch = v4.x
+  - name: coverity
+    if: branch = master OR branch = coverity_scan
+
+jobs:
+  include:
+    #### STAGE: test
+    - stage: test
+      name: test trusty
+      os: linux
+      dist: trusty
+      env:
+        - SKIP_IPV6=1
+      install:
+        - ci/build-1-autotools.sh
+
+    - name: test xenial
+      os: linux
+      dist: xenial
+      env:
+        - SKIP_IPV6=1
+
+    - name: test bionic
+      os: linux
+      dist: bionic
+      env:
+        - SKIP_IPV6=1
+
+    - name: test bionic lxd arm64
+      os: linux
+      dist: bionic
+      arch: arm64
+
+    - name: test macos
+      os: osx
+      install:
+        - ci/build-2-test-command.sh
+        - ci/build-3-prepare-macos.sh
+      env:
+        - SKIP_IPV6=1
+
+    #### STAGE: deploy
+    - stage: deploy
+      name: deploy
+      os: linux
+      dist: xenial
+      env:
+        - SKIP_IPV6=1
+      after_success:
         - ci/deploy-bintray.sh
 
-addons:
-  coverity_scan:
-    project:
-      name: "schweikert/fping"
-      description: "Build submitted via Travis CI"
-    notification_email: david@schweikert.ch
-    #build_command_prepend: "ci/build-2-install.sh"
-    build_command:   "ci/build-2-install.sh"
-    branch_pattern: coverity_scan
+    #### STAGE: coverity
+    - stage: coverity
+      name: coverity
+      os: linux
+      dist: xenial
+      after_success:
+      script:
+        - ci/deploy-coverity.sh

.vscode/launch.json

@@ -0,0 +1,35 @@
+{
+  "configurations": [
+    {
+      "name": "Debug fping",
+      "type": "cppdbg",
+      "request": "launch",
+      "program": "${workspaceFolder}/src/fping",
+      "args": ["127.0.0.1"],
+      "stopAtEntry": false,
+      "cwd": "${workspaceFolder}",
+      "environment": [],
+      "externalConsole": false,
+      "MIMode": "gdb",
+      "setupCommands": [
+        {
+          "description": "Enable pretty-printing for gdb",
+          "text": "-enable-pretty-printing",
+          "ignoreFailures": true
+        },
+        {
+          "description": "Set Disassembly Flavor to Intel",
+          "text": "-gdb-set disassembly-flavor intel",
+          "ignoreFailures": true
+        }
+      ],
+      "preLaunchTask": "build",
+      "postDebugTask": "autoclean",
+      "miDebuggerPath": "/usr/bin/gdb",
+      "logging": {
+        "engineLogging": false
+      }
+    }
+  ],
+  "version": "2.0.0"
+}

.vscode/tasks.json

@@ -0,0 +1,45 @@
+{
+  "tasks": [
+    {
+      "type": "shell",
+      "label": "autogen",
+      "command": "./autogen.sh",
+      "group": {
+        "kind": "build",
+        "isDefault": true
+      },
+      "problemMatcher": []
+    },
+    {
+      "type": "shell",
+      "label": "configure",
+      "command": "./configure",
+      "args": ["--enable-debug"],
+      "group": {
+        "kind": "build",
+        "isDefault": true
+      },
+      "dependsOn": ["autogen"],
+      "problemMatcher": []
+    },
+    {
+      "type": "shell",
+      "label": "build",
+      "command": "make",
+      "args": ["CFLAGS=\"-g -O0\""],
+      "group": {
+        "kind": "build",
+        "isDefault": true
+      },
+      "dependsOn": ["configure"],
+      "problemMatcher": ["$gcc"]
+    },
+    {
+      "type": "shell",
+      "label": "autoclean",
+      "command": "./autoclean.sh",
+      "problemMatcher": []
+    }
+  ],
+  "version": "2.0.0"
+}

CHANGELOG.md

@@ -0,0 +1,246 @@
+fping 5.2 (2024-04-21)
+======================
+
+## New features
+
+- New option -X / --fast-reachable to exit immediately once N hosts have been
+  found (#260, thanks @chriscray and @gsnw)
+
+- New option -k / -fwmark to set Linux fwmark mask (#289, thanks @tomangert and
+  @deepkv)
+
+## Bugfixes and other changes
+
+- Always output fatal error messages (#303, thanks @auerswal)
+- Fallback to SO\_TIMESTAMP if SO\_TIMESTAMPNS is not available (#279, thanks
+  @gsnw)
+- Fix "not enough sequence numbers available" error on BSD-like systems (#307,
+  thanks @cagney, @gsnw)
+- Fix running in unprivileged mode (#248, thanks @sfan5)
+- Fix build issue for NetBSD/alpha (#255, thanks @0-wiz-0)
+- Fix build issue for OpenBSD/alpha (#275, thanks @gsnw)
+- Fix build warning for long int usage (#258, thanks @gsnw)
+- Fix build error with musl libc (#263, thanks @kraj)
+- Fix to guard against division by zero (#293, thanks @auerswal)
+- Decouple -a/-u effects from -c (#298, thanks @auerswal)
+- Added contrib/Dockerfile (#224, thanks @darless)
+- Remove host from Netdata chart titles (#253, thanks @ilyam8)
+- Add additional tests (#292, #297, thanks @auerswal)
+- Update github action os images (#282, thanks @gsnw)
+- Fix Azure pipeline tests (#308, thanks @gsnw)
+- Various autoconf fixes (#286, #283, thanks @gsnw)
+- Extended configure script with --enable-debug and output cpu usage (#311,
+  thanks @gsnw)
+- Documentation: Update Netdata website link (#257, thanks @ilyam8)
+- Documentation: fix description of --file option (#268, thanks @MohGeek)
+- Documentation: improve exit status description (#294, thanks @auerswal)
+- Documentation: move description of -i MSEC (#298, thanks @auerswal)
+- Documentation: improve help output for options -c and -C (#302, #auerswal)
+
+
+fping 5.1 (2022-02-06)
+======================
+
+## Bugfixes and other changes
+
+- Use setcap to specify specific files in fping.spec (#232, thanks @zdyxry)
+- Netdata: use host instead name as family label (#226, thanks @k0ste)
+- Netdata: use formatstring macro PRId64 (#229, thanks @gsnw)
+- Allow -4 option to be given multiple times (#215, thanks @normanr)
+- Documentation fix (#208, thanks @timgates42)
+- Retain privileges until after privileged setsockopt (#200, thanks @simetnicbr)
+- Set bind to source only when option is set (#198, thanks @dinoex)
+- Update Azure test pipeline (#197, thanks @gsnw)
+- Fix getnameinfo not called properly for IPv4 (#227, thanks @aafbsd)
+- Fixed wrong timestamp under Free- and OpenBSD and macOS (#217, thanks @gsnw)
+- Documentation updates (#240, thanks @auerswal)
+- Updated autotools (autoconf 2.71, automake 1.16.5, libtool 2.4.6)
+
+
+fping 5.0 (2020-08-05)
+======================
+
+## Incompatible Changes
+
+- In non-quiet loop and count mode, a line is printed for every lost packet
+  (#175, thanks @kbucheli):
+
+  ```
+  $ fping -D -c2 8.8.8.8 8.8.8.7
+  [1596092373.18423] 8.8.8.8 : [0], 64 bytes, 12.8 ms (12.8 avg, 0% loss)
+  [1596092374.18223] 8.8.8.7 : [0], timed out (NaN avg, 100% loss)
+  [1596092374.18424] 8.8.8.8 : [1], 64 bytes, 12.3 ms (12.5 avg, 0% loss)
+  [1596092375.18344] 8.8.8.7 : [1], timed out (NaN avg, 100% loss)
+
+  8.8.8.8 : xmt/rcv/%loss = 2/2/0%, min/avg/max = 12.3/12.5/12.8
+  8.8.8.7 : xmt/rcv/%loss = 2/0/100%
+  ```
+
+- The returned size in bytes now always excludes the IP header, so if before it
+  reported '84 bytes' e.g. when using 'fping -l', now it reports '64 bytes'.
+  This is to make the reported size consistent with ping(8) from iputils and
+  also with fping when pinging a IPv6 host (which never included the IPv6
+  header size).
+
+## New features
+
+- The number of sent pings is only counted when the pings are received or have
+  timed out, ensuring that the loss ratio will be always correct. This makes it
+  possible, for example, to use loop mode (-l) with interval statistics (-Q)
+  and a timeout larger than period, without having the issue that initially
+  some pings would be reported as missing (#193)
+
+- Improved precision of measurements from 10us to 1us (#136, thanks @tycho)
+
+## Bugfixes and other changes
+
+- The reported size of received packets is now always correct on Linux even for
+  packets > 4096 bytes (#180)
+
+- Travis CI automated testing now also macos testing and additional ubuntu
+  distributions (#196)
+
+fping 4.4 (2020-07-24)
+======================
+## Bugfixes and other changes
+
+- Fix wrong ident used for normal (non-unprivileged) pings (#191, thanks @tycho)
+- Fix build with --disable-ipv6 (#187, thanks Polynomial-C)
+
+fping 4.3 (2020-07-11)
+======================
+
+## New features
+
+- Linux unprivileged ping support (#173, thanks @tycho)
+- Add SIGQUIT summary support similar to ping (#185, thanks @laddp)
+
+## Bugfixes and other changes
+
+- Corrected long option name of -s to --stats (#148, thanks @wopfel)
+- Do not fail if using fping6 with -6 flag (#149, thanks @stromnet)
+- Fail if interface binding (-I) does not work (#162, thanks @kbucheli)
+- Fix using option -4 when fping is compiled IPv4-only (#154, thanks @pbhenson)
+- Add Azure pipeline test build (#153 and #170, thanks @gsnw)
+- GCC 10 compatibility fixes (#167 and #168, thanks @cranderson)
+- Macos build fix (#174, thanks @tycho)
+- Fix xmt stats in Netdata output (#172, thanks @vlvkobal)
+- Only increase num_alive if response is not a duplicate (#151, thanks @brownowski)
+- Use line buffering for stdout (#179, thanks @bg6cq)
+
+fping 4.2 (2019-02-19)
+======================
+
+## New features
+
+- New option -x / --reachable to check if the number of reachable hosts is >= a certain
+  number. Useful for example to implement connectivity-checks (#138, thanks @deepak0004)
+
+## Bugfixes and other changes
+
+- Allow decimal numbers for '-t', '-i', '-p', and '-Q'
+- Fix build with --disable-ipv6 (#134, thanks @Polynomial-C)
+- Fix hang with '-6', with ipv6 kernel module, but not loaded (#140, thanks @abelbeck)
+- Assume '-6' if the binary is named 'fping6' (this is mostly for special
+  embedded-distro use cases, and not meant to be used generally in place of
+  compiling IPv6-only binary or using '-6', see also the notes in #139, thanks
+  abelbeck)
+- Get rid of warning "timeout (-t) value larger than period (-p) produces unexpected results"
+  (#142, thanks @MrDragon1122)
+  
+
+fping 4.1 (2018-09-17)
+======================
+
+## Bugfixes and other changes
+
+- Fix problem when socket fd is 0 (#125, thanks Ramón Novoa!)
+- Fix running on servers with disabled IPv6 (#118, thanks Simon Matter)
+- Allow running "fping -h" or "--help" even when raw socket can't be opened (#131, thanks @teto)
+- Fix build issue with FreeBSD and IPv6 (#132, thanks @gsnw)
+
+fping 4.0 (2017-04-23)
+======================
+
+## Incompatible Changes
+
+##### fping and fping6 unification
+
+fping and fping6 are now unified into one binary. It means that, for example,
+doing 'fping google.com' is going to ping the IPv6 IP of google.com on
+IPv6-enabled hosts.  
+
+If you need exact compatibility with old versions, you can configure and
+install fping twice: once for ipv4, and once for ipv6:
+
+    ./configure --disable-ipv6; make clean install
+    ./configure --disable-ipv4 --program-suffix=6; make clean install
+
+##### Option -n, not the same as -d anymore
+
+Option -n / --name is now doing a reverse-DNS lookups on host addresses,
+only if they are given as IP address, but not for hostnames. For example,
+if you write 'fping -n google.com', fping would previously do a
+forward-DNS lookup on google.com, and then a reverse-DNS lookup on the
+resolved IP address. Now, it is just going to keep the name 'google.com'.
+That same behavior can be achieved with the option -d / --rdns (which was
+previously an alias for -n).
+
+                     fping<4.0              fping>=4.0
+    fping -n NAME    NAME->IP->IPNAME       NAME
+    fping -d NAME    NAME->IP->IPNAME       NAME->IP->IPNAME
+
+##### Discarding of late packets
+
+fping will now discard replies, if they arrive after the defined timeout
+for reply packets, specified with -t. This change is relevant only for the
+count and loop modes, where the measured times should be now more
+consistent (see github issue [#32][i32] for details).
+
+To prevent loosing reply packets because of this change, the default
+timeout in count and loop modes is now automatically adjusted to the
+period interval (up to 2000 ms), but it can be overriden with the -t
+option. The default timeout for non-loop/count modes remains 500 ms.
+
+##### No restrictions by default
+
+fping will not enforce -i >= 1 and -p >= 10 anymore, except if you
+'./configure --enable-safe-limits'.
+
+The reasoning to removing the restrictions by default, is that users can
+clog the network with other tools anyway, and these restrictions are
+sometimes getting in the way (for example if you try to ping a lot of
+hosts).
+
+##### Default interval (-i) changed from 25ms to 10ms
+
+The default minimum interval between ping probes has been changed from
+25ms to 10ms. The reason is that 25ms is very high, considering today's
+fast networks: it generates at most 31 kbps of traffic (for IPv4 and
+default payload size).
+
+## New features
+
+- Unified 'fping' and 'fping6' into one binary ([#80][i80])
+- Long option names for all options
+- IPv6 enabled by default
+- New option -4 to force IPv4
+- New option -6 to force IPv6
+- Keep original name if a hostname is given with -n/--name
+- Option -d/--rdns now always does a rdns-lookup, even for names, as '-n' was doing until now
+- Enforce -t timeout on reply packets, by discarding late packets ([#32][i32])
+- Auto-adjust timeout for -c/-C/-l mode to value of -p
+
+## Bugfixes and other changes
+
+- -i/-p restrictions disabled by default (enable with --enable-safe-limits)
+- Default interval -i changed from 25ms to 10ms
+- Fix compatibility issue with GNU Hurd
+- A C99 compiler is now required
+- Option parsing with optparse (https://github.com/skeeto/optparse). Thanks Christopher Wellons!
+- New changelog file format
+
+[i32]: https://github.com/schweikert/fping/issues/32
+[i80]: https://github.com/schweikert/fping/issues/80
+
+(see doc/CHANGELOG.pre-v4 for older changes)

Makefile.am

@@ -1 +1,3 @@
 SUBDIRS = doc src
+
+EXTRA_DIST = CHANGELOG.md contrib README.md ci/*.sh ci/*.pl

README

@@ -1,55 +0,0 @@
-fping 3 README
---------------
-fping is a program to send ICMP echo probes to network hosts, similar to ping,
-but much better performing when pinging multiple hosts. fping has a long long
-story: Roland Schemers did publish a first version of it in 1992 and it has
-established itself since then as a standard tool.
-
-Current maintainer:
-   David Schweikert <david@schweikert.ch>
-
-Website:
-   http://fping.org/
-
-Mailing-list:
-   https://groups.google.com/group/fping-users
-
-
-Installation
-------------
-If you want to install fping from source, proceed as follows:
-
-0. Run ./autogen.sh
-   (only if you got the source from github)
-
-1. Run ./configure with the correct arguments
-   (see: ./configure --help)
-
-2. Run make; make install
-
-3. Make fping either setuid, or, if under Linux:
-
-   sudo setcap cap_net_raw+ep fping
-
-4. Have a look at the fping(8) manual for usage help
-   (fping -h will also give a minimal help output)
-
-
-IPv6 support
-------------
-You can can compile fping with support for IPv6 addresses. A separate binary
-is used for that, called fping6. To build it, use ./configure --enable-ipv6
-(possibly combined with --enable-ipv4 to also build fping for IPv4). E.g.:
-
-  # ./configure --prefix=/usr/local --enable-ipv4 --enable-ipv6
-  # make
-  # make install
-  # sudo setcap cap_net_raw+ep /usr/local/bin/fping*
-
-
-Credits
--------
-Original author:  Roland Schemers (schemers@stanford.edu)
-Previous maintainer:  RL "Bob" Morgan (morgan@stanford.edu)
-Initial IPv6 Support: Jeroen Massar (jeroen@unfix.org / jeroen@ipng.nl)
-Other contributors: see ChangeLog

README.md

@@ -1,8 +1,8 @@
 [![Build Status](https://travis-ci.org/schweikert/fping.svg?branch=develop)](https://travis-ci.org/schweikert/fping)
-[![Coverage Status](https://coveralls.io/repos/schweikert/fping/badge.svg?branch=develop&service=github)](https://coveralls.io/github/schweikert/fping?branch=develop)
+[![Coverage Status](https://coveralls.io/repos/github/schweikert/fping/badge.svg?branch=develop)](https://coveralls.io/github/schweikert/fping?branch=develop)
 [![Coverity Scan Build Status](https://scan.coverity.com/projects/11559/badge.svg?flat=1")](https://scan.coverity.com/projects/schweikert-fping)
 
-# fping 3
+# fping
 
 fping is a program to send ICMP echo probes to network hosts, similar to ping,
 but much better performing when pinging multiple hosts. fping has a long long
@@ -13,7 +13,7 @@ _Current maintainer_:
   David Schweikert \<david@schweikert.ch\>
 
 _Website_:  
-  http://fping.org/
+  https://fping.org/
 
 _Mailing-list_:  
   https://groups.google.com/group/fping-users
@@ -22,32 +22,29 @@ _Mailing-list_:
 
 If you want to install fping from source, proceed as follows:
 
-0. Run ./autogen.sh
-   (only if you got the source from github)
-1. Run ./configure with the correct arguments
-   (see: ./configure --help)
-2. Run make; make install
+0. Run `./autogen.sh`
+   (only if you got the source from Github).
+1. Run `./configure` with the correct arguments.
+   (see: `./configure --help`)
+2. Run `make; make install`.
 3. Make fping either setuid, or, if under Linux:
-   sudo setcap cap_net_raw+ep fping
-4. Have a look at the fping(8) manual for usage help
-   (fping -h will also give a minimal help output)
+   `sudo setcap cap_net_raw,cap_net_admin+ep fping`
 
-## Usage
-
-See: [fping man-page](doc/fping.pod)
+If you can't run fping as root or can't use the cap_net_raw capability, you can
+also run fping in unprivileged mode. This works on MacOS and also on Linux,
+provided that your GID is included in the range defined in
+`/proc/sys/net/ipv4/ping_group_range`. This is particularly useful for running
+fping in rootless / unprivileged containers. The --fwmark option needs root or
+cap_net_admin. setuid will not work for --fwmark.
 
-## IPv6 support
-You can can compile fping with support for IPv6 addresses. A separate binary
-is used for that, called fping6. To build it, use ./configure --enable-ipv6
-(possibly combined with --enable-ipv4 to also build fping for IPv4). E.g.:
+## Usage
 
-    # ./configure --prefix=/usr/local --enable-ipv4 --enable-ipv6
-    # make
-    # make install
-    # sudo setcap cap_net_raw+ep /usr/local/bin/fping*
+Have a look at the [fping(8)](doc/fping.pod) manual page for usage help.
+(`fping -h` will also give a minimal help output.)
 
 ## Credits
-Original author:  Roland Schemers (schemers@stanford.edu)
-Previous maintainer:  RL "Bob" Morgan (morgan@stanford.edu)
-Initial IPv6 Support: Jeroen Massar (jeroen@unfix.org / jeroen@ipng.nl)
-Other contributors: see ChangeLog
+
+* Original author:  Roland Schemers (schemers@stanford.edu)
+* Previous maintainer:  RL "Bob" Morgan (morgan@stanford.edu)
+* Initial IPv6 Support: Jeroen Massar (jeroen@unfix.org / jeroen@ipng.nl)
+* Other contributors: see [CHANGELOG.md](CHANGELOG.md)

autoclean.sh

@@ -4,6 +4,7 @@ rm -f Makefile
 rm -f Makefile.in
 rm -f aclocal.m4
 rm -rf autom4te.cache
+rm -f compile
 rm -f config.guess
 rm -f config.h
 rm -f config.h.in
@@ -16,7 +17,9 @@ rm -f install-sh
 rm -f missing
 rm -f mkinstalldirs
 rm -f stamp-h1
+rm -f doc/Makefile
 rm -f doc/Makefile.in
+rm -f src/Makefile
 rm -f src/Makefile.in
 rm -f doc/fping.8
 rm -f src/*.gcda

azure-pipelines.yml

@@ -0,0 +1,52 @@
+jobs:
+- job: linux_build
+  displayName: Linux Build
+
+  pool:
+    name: Azure Pipelines
+    vmImage: 'ubuntu-latest'
+  workspace:
+    clean: all
+  steps:
+  - script: |
+     sudo apt-get update -qq
+     sudo apt-get install libcap2-bin libtest-command-perl
+    displayName: 'before_install'
+
+  - script: |
+     ci/build-4-compile.sh
+    displayName: install
+
+  - script: |
+     set -ex
+     PATH=`pwd`/src:$PATH
+     prove $(ls ci/test-*.pl|grep -v internet-hosts|grep -v -E "test-13-unknown-host.pl|test-14-ping-internet-hosts.pl")
+     ci/test-tarball.sh
+    displayName: 'build_test'
+
+- job: macos_build
+  displayName: macOS Build
+
+  pool:
+    name: Azure Pipelines
+    vmImage: 'macos-latest'
+  workspace:
+    clean: all
+  steps:
+    - script: |
+       brew install autoconf automake lcov
+       ci/build-2-test-command.sh
+       ci/build-3-prepare-macos.sh
+      displayName: 'before_install'
+
+    - script: |
+       ci/build-4-compile.sh
+      displayName: install
+
+    - script: |
+       set -ex
+       PATH=`pwd`/src:$PATH
+       export SKIP_IPV6=1
+       prove $(ls ci/test-*.pl|grep -v internet-hosts|grep -v test-10-option-u-x.pl)
+       ci/run-lcov.sh
+      displayName: 'build_test'

ci/build-1-autotools.sh

@@ -1,8 +1,15 @@
-#!/bin/bash -e
+#!/bin/bash
 
-AUTOCONF=http://ftp.gnu.org/gnu/autoconf/autoconf-2.69.tar.gz
-AUTOMAKE=http://ftp.gnu.org/gnu/automake/automake-1.14.1.tar.gz
-LIBTOOL=http://alpha.gnu.org/gnu/libtool/libtool-2.4.2.418.tar.gz
+set -e
+set -x
+
+if [[ "$OSTYPE" == "darwin"* ]]; then
+    exit 0
+fi
+
+AUTOCONF=http://ftp.gnu.org/gnu/autoconf/autoconf-2.71.tar.gz
+AUTOMAKE=http://ftp.gnu.org/gnu/automake/automake-1.16.5.tar.gz
+LIBTOOL=http://ftp.gnu.org/gnu/libtool/libtool-2.4.6.tar.gz
 PREFIX=$(pwd)/ci/build
 PATH=$(pwd)/ci/build/bin:$PATH
 

ci/build-2-test-command.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+set -ex
+
+curl -L http://cpanmin.us | perl - -L $HOME/perl5 App::cpanminus
+$HOME/perl5/bin/cpanm --sudo Test::Command

ci/build-3-prepare-macos.sh

@@ -11,8 +11,3 @@ if [[ ! `ifconfig lo0` =~ 127\.0\.0\.2 ]]; then
     sudo ifconfig lo0 127.0.0.4/8 alias
     sudo ifconfig lo0 127.0.0.5/8 alias
 fi 
-
-if [[ ! $PATH =~ /Users/dws/checkouts/fping/src ]]; then
-    echo "# WARNING: must set PATH:"
-    echo PATH=/Users/dws/checkouts/fping/src:\$PATH
-fi

ci/build-4-compile.sh

@@ -9,11 +9,10 @@ if [ ! -d ci ]; then
 fi
 
 autoreconf -i
-./configure --enable-ipv4 --enable-ipv6 --prefix=/opt/fping
-make CFLAGS="-g -fprofile-arcs -ftest-coverage"
+./configure --enable-ipv4 --enable-ipv6 --enable-safe-limits --prefix=/opt/fping
+make CFLAGS="-g -O0 -fprofile-arcs -ftest-coverage"
 ## setcap currently doesn't work anymore on travis-ci
 #sudo setcap cap_net_raw+ep src/fping
-#sudo setcap cap_net_raw+ep src/fping6
 ## setcap debugging:
 #pwd
 #df -k .
@@ -26,6 +25,4 @@ make CFLAGS="-g -fprofile-arcs -ftest-coverage"
 
 # use setuid, since setcap is not available
 sudo chown root src/fping
-sudo chown root src/fping6
 sudo chmod u+s  src/fping
-sudo chmod u+s  src/fping6

ci/coveralls.sh

@@ -1,13 +0,0 @@
-#!/bin/sh
-
-set -x
-
-sudo -H pip install cpp-coveralls
-
-cd src
-
-ls -l
-
-gcov *.o
-cd ..
-coveralls --exclude ci --no-gcov

ci/deploy-bintray.sh

@@ -4,18 +4,6 @@
 
 set -e
 
-# do this only for the gcc run
-#if [ "$CC" != "gcc" ]; then
-#    echo "skipped upload because $CC != gcc"
-#    exit 0
-#fi
-
-# do this only for the master and version3 branch
-if [ "$TRAVIS_BRANCH" != "master" -a "$TRAVIS_BRANCH" != "version3" ]; then
-    echo "skipped upload branch $TRAVIS_BRANCH isn't master/version3"
-    exit 0
-fi
-
 VERSION=$(ls fping-*.tar.gz | sed -e 's/^fping-//' | sed -e 's/\.tar\.gz$//')
 if [[ "$VERSION" =~ ^[0-9]+\.[0-9]+$ ]]; then
     REPO=release

ci/deploy-coveralls.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+set -xe
+
+if [ "$TRAVIS_DIST" = "trusty" ]; then
+    echo "skip coveralls on trusty because coveralls errors out due to python issues"
+    exit 0
+elif [ "$TRAVIS_OS_NAME" = "osx" ]; then
+    pip3 install --user cpp-coveralls
+    PATH="${PATH}:$(python3 -c 'import site; print(site.USER_BASE)')/bin"
+else
+    pip install --user cpp-coveralls
+fi
+
+export COVERALLS_PARALLEL=true
+coveralls --build-root src --exclude src/optparse.c --exclude ci --exclude config.h --gcov-options '\-lp'

ci/deploy-coverity.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+set -e
+
+COVERITY_SCAN_PROJECT_NAME=schweikert/fping
+COVERITY_SCAN_EMAIL=david@schweikert.ch
+
+if [ -z "$COVERITY_SCAN_TOKEN" ]; then
+    echo "ERROR: COVERITY_SCAN_TOKEN not defined." >&2
+    exit 1
+fi
+
+curl -o /tmp/cov-analysis-linux64.tgz https://scan.coverity.com/download/linux64 \
+    --form project=$COVERITY_SCAN_PROJECT_NAME --form token=$COVERITY_SCAN_TOKEN
+tar xfz /tmp/cov-analysis-linux64.tgz
+./autogen.sh
+./configure --enable-ipv4 --enable-ipv6 --enable-safe-limits --prefix=/opt/fping
+cov-analysis-linux64-*/bin/cov-build --dir cov-int make -j4
+tar cfz cov-int.tar.gz cov-int
+curl https://scan.coverity.com/builds?project=$COVERITY_SCAN_PROJECT_NAME \
+    --form token=$COVERITY_SCAN_TOKEN \
+    --form email=$COVERITY_SCAN_EMAIL \
+    --form file=@cov-int.tar.gz \
+    --form version="`git rev-parse --short HEAD`" \
+    --form description="`git rev-parse --short HEAD` / $TRAVIS_BUILD_ID "

ci/prepare-linux.sh

@@ -1,9 +1,7 @@
 #!/bin/bash
 
-sudo setcap cap_net_raw+ep src/fping
-sudo setcap cap_net_raw+ep src/fping6
+sudo setcap cap_net_raw,cap_net_admin+ep src/fping
 
 if [[ ! $PATH =~ fping/src ]]; then
-    echo "# WARNING: must set PATH:"
-    echo PATH=/home/dws/checkouts/fping/src:\$PATH
+    PATH=/home/dws/checkouts/fping/src:$PATH
 fi

ci/run-lcov.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+lcov -c -no-external \
+    -d . \
+    -b src \
+    -o lcov-all.info
+
+lcov --remove lcov-all.info -o lcov.info \
+    '*/optparse.c'

ci/run-tests.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+set -ex
+
+PATH=`pwd`/src:$PATH
+
+prove ci/test-*.pl
+ci/test-tarball.sh

ci/test-01-basics.pl

@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 
-use Test::Command tests => 9;
+use Test::Command tests => 12;
 use Test::More;
 
 # ping 127.0.0.1
@@ -14,22 +14,34 @@ use Test::More;
 # ping ::1
 SKIP: {
     #system("/sbin/ifconfig >&2");
-    if(system("/sbin/ifconfig | grep inet6") != 0) {
-        skip 'No IPv6 on this host', 3;
+    if($ENV{SKIP_IPV6}) {
+        skip 'Skip IPv6 tests', 3;
     }
-    my $cmd = Test::Command->new(cmd => "fping6 ::1");
+    my $cmd = Test::Command->new(cmd => "fping ::1");
     $cmd->exit_is_num(0);
     $cmd->stdout_is_eq("::1 is alive\n");
     $cmd->stderr_is_eq("");
 }
 
+# ping ff02::1
+SKIP: {
+    #system("/sbin/ifconfig >&2");
+    if($ENV{SKIP_IPV6}) {
+        skip 'Skip IPv6 tests', 3;
+    }
+    my $cmd = Test::Command->new(cmd => "fping ff02::1");
+    $cmd->exit_is_num(0);
+    $cmd->stdout_is_eq("ff02::1 is alive\n");
+    $cmd->stderr_like(qr{ \[<- .*\]});
+}
+
 # ping 3 times 127.0.0.1
 {
     my $cmd = Test::Command->new(cmd => "fping -p 100 -C3 127.0.0.1");
     $cmd->exit_is_num(0);
-    $cmd->stdout_like(qr{127\.0\.0\.1 : \[0\], 84 bytes, 0\.\d+ ms \(0\.\d+ avg, 0% loss\)
-127\.0\.0\.1 : \[1\], 84 bytes, 0\.\d+ ms \(0.\d+ avg, 0% loss\)
-127\.0\.0\.1 : \[2\], 84 bytes, 0\.\d+ ms \(0.\d+ avg, 0% loss\)
+    $cmd->stdout_like(qr{127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[2\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
 });
-    $cmd->stderr_like(qr{127\.0\.0\.1 : 0\.\d+ 0\.\d+ 0\.\d+\n});
+    $cmd->stderr_like(qr{127\.0\.0\.1 : \d\.\d+ \d\.\d+ \d\.\d+\n});
 }

ci/test-02-help.pl

@@ -1,68 +1,40 @@
 #!/usr/bin/perl -w
 
-use Test::Command tests => 9;
+use Test::Command tests => 12;
 
-my $I_HELP = "   -I if      bind to a particular interface\n";
+my $I_HELP = "   -I, --iface=IFACE  bind to a particular interface\n";
 $I_HELP = '' if $^O eq 'darwin';
 
-# fping -h
+# fping -h (special pre-parse code path)
 my $cmd1 = Test::Command->new(cmd => "fping -h");
 $cmd1->exit_is_num(0);
-$cmd1->stdout_is_eq(<<END);
+$cmd1->stdout_like(qr{Usage: fping \[options\] \[targets\.\.\.\]
 
-Usage: fping [options] [targets...]
-   -a         show targets that are alive
-   -A         show targets by address
-   -b n       amount of ping data to send, in bytes (default 56)
-   -B f       set exponential backoff factor to f
-   -c n       count of pings to send to each target (default 1)
-   -C n       same as -c, report results in verbose format
-   -D         print timestamp before each output line
-   -e         show elapsed time on return packets
-   -f file    read list of targets from a file ( - means stdin) (only if no -g specified)
-   -g         generate target list (only if no -f specified)
-                (specify the start and end IP in the target list, or supply a IP netmask)
-                (ex. fping -g 192.168.1.0 192.168.1.255 or fping -g 192.168.1.0/24)
-   -H n       Set the IP TTL value (Time To Live hops)
-   -i n       interval between sending ping packets (in millisec) (default 25)
-${I_HELP}   -l         loop sending pings forever
-   -m         use all IPs of provided hostnames (e.g. IPv4 and IPv6), use with -A
-   -M         set the Don't Fragment flag
-   -n         show targets by name (-d is equivalent)
-   -N         output compatible for netdata (-l -Q are required)
-   -o         show the accumulated outage time (lost packets * packet interval)
-   -O n       set the type of service (tos) flag on the ICMP packets
-   -p n       interval between ping packets to one target (in millisec)
-                (in looping and counting modes, default 1000)
-   -q         quiet (don't show per-target/per-ping results)
-   -Q n       same as -q, but show summary every n seconds
-   -r n       number of retries (default 3)
-   -R         random packet data (to foil link data compression)
-   -s         print final stats
-   -S addr    set source address
-   -t n       individual target initial timeout (in millisec) (default 500)
-   -T n       ignored (for compatibility with fping 2.4)
-   -u         show targets that are unreachable
-   -v         show version
-   targets    list of targets to check (if no -f specified)
-
-END
+Probing options:
+.*
+   -v, --version      show version
+}s);
 $cmd1->stderr_is_eq("");
 
+# fping -4 -h (normal option parsing code path)
+my $cmd4 = Test::Command->new(cmd => "fping -4 -h");
+$cmd4->exit_is_num(0);
+$cmd4->stdout_like(qr{Usage: fping \[options\] \[targets\.\.\.\]
+
+Probing options:
+.*
+   -v, --version      show version
+}s);
+$cmd4->stderr_is_eq("");
+
 # fping -v
 my $cmd2 = Test::Command->new(cmd => "fping -v");
 $cmd2->exit_is_num(0);
-$cmd2->stdout_like(qr{fping: Version \S+
-fping: comments to david\@schweikert\.ch\n});
+$cmd2->stdout_like(qr{fping: Version \S+});
 $cmd2->stderr_is_eq("");
 
 # fping with unknown option
 my $cmd3 = Test::Command->new(cmd => "fping -Z");
 $cmd3->exit_is_num(1);
 $cmd3->stdout_is_eq("");
-if($^O eq 'darwin') {
-    $cmd3->stderr_is_eq("fping: illegal option -- Z\nsee 'fping -h' for usage information\n");
-}
-else {
-    $cmd3->stderr_is_eq("fping: invalid option -- 'Z'\nsee 'fping -h' for usage information\n");
-}
+$cmd3->stderr_like(qr{^fping: (illegal|invalid) option -- '?Z'?\nsee 'fping -h' for usage information\n$});

ci/test-03-forbidden.pl

@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 
-use Test::Command tests => 24;
+use Test::Command tests => 36;
 
 # fping -i 0
 my $cmd1 = Test::Command->new(cmd => "fping -i 0 -T10 -g 127.0.0.1/29");
@@ -24,7 +24,7 @@ END
 my $cmd5 = Test::Command->new(cmd => "fping -H 300 127.0.0.1");
 $cmd5->exit_is_num(1);
 $cmd5->stdout_is_eq("");
-$cmd5->stderr_is_eq("ttl 300 out of range\n");
+$cmd5->stderr_is_eq("fping: ttl 300 out of range\n");
 
 # fping -a -u
 my $cmd6 = Test::Command->new(cmd => "fping -a -u 127.0.0.1");
@@ -38,11 +38,11 @@ $cmd7->exit_is_num(1);
 $cmd7->stdout_is_eq("");
 $cmd7->stderr_is_eq("fping: specify only one of c, l\n");
 
-# fping -b 65489
-my $cmd8 = Test::Command->new(cmd => "fping -b 65489 127.0.0.1");
+# fping -b 65509
+my $cmd8 = Test::Command->new(cmd => "fping -b 65509 127.0.0.1");
 $cmd8->exit_is_num(1);
 $cmd8->stdout_is_eq("");
-$cmd8->stderr_is_eq("fping: data size 65489 not valid, must be lower than 65488\n");
+$cmd8->stderr_is_eq("fping: data size 65509 not valid, must be lower than 65488\n");
 
 # fping -B 0.9
 my $cmd9 = Test::Command->new(cmd => "fping -B 0.9 127.0.0.1");
@@ -50,9 +50,16 @@ $cmd9->exit_is_num(1);
 $cmd9->stdout_is_eq("");
 $cmd9->stderr_is_eq("fping: backoff factor 0.9 not valid, must be between 1.0 and 5.0\n");
 
-# fping -B 0.9
+# fping -B 5.1
 my $cmd10 = Test::Command->new(cmd => "fping -B 5.1 127.0.0.1");
 $cmd10->exit_is_num(1);
 $cmd10->stdout_is_eq("");
 $cmd10->stderr_is_eq("fping: backoff factor 5.1 not valid, must be between 1.0 and 5.0\n");
 
+# non-negative only
+for my $arg (qw(i p Q t)) {
+    my $cmd = Test::Command->new(cmd => "fping -$arg -1");
+    $cmd->exit_is_num(1);
+    $cmd->stdout_is_eq("");
+    $cmd->stderr_like(qr{Usage:});
+}

ci/test-04-options-a-b.pl

@@ -1,14 +1,65 @@
 #!/usr/bin/perl -w
 
-use Test::Command tests => 14;
+use Test::Command tests => 32;
 use Test::More;
 use Time::HiRes qw(gettimeofday tv_interval);
 
+#  -4         only use IPv4 addresses
+#  -6         only use IPv6 addresses
 #  -a         show targets that are alive
 #  -A         show targets by address
 #  -b n       amount of ping data to send, in bytes (default 56)
 #  -B f       set exponential backoff factor to f
 
+# fping -4 -6
+{
+my $cmd = Test::Command->new(cmd => "fping -4 -6 127.0.0.1");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_is_eq("fping: can't specify both -4 and -6\n");
+}
+
+# fping -6 -4
+{
+my $cmd = Test::Command->new(cmd => "fping -6 -4 127.0.0.1");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_is_eq("fping: can't specify both -4 and -6\n");
+}
+
+# fping -4
+{
+my $cmd = Test::Command->new(cmd => "fping -4 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_is_eq("127.0.0.1 is alive\n");
+$cmd->stderr_is_eq("");
+}
+
+{
+my $cmd = Test::Command->new(cmd => "fping -4 ::1");
+$cmd->exit_is_num(2);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{^::1:.*(not supported|not known)});
+}
+
+# fping -6
+SKIP: {
+    if($ENV{SKIP_IPV6}) {
+        skip 'Skip IPv6 tests', 3;
+    }
+    my $cmd = Test::Command->new(cmd => "fping -6 ::1");
+    $cmd->exit_is_num(0);
+    $cmd->stdout_is_eq("::1 is alive\n");
+    $cmd->stderr_is_eq("");
+}
+
+{
+my $cmd = Test::Command->new(cmd => "fping -6 127.0.0.1");
+$cmd->exit_is_num(2);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{127\.0\.0\.1:.*(not supported|not known)});
+}
+
 # fping -a
 {
 my $cmd = Test::Command->new(cmd => "fping -a 127.0.0.1 127.0.0.2");
@@ -19,7 +70,7 @@ $cmd->stderr_is_eq("");
 
 # fping -A
 {
-my $cmd = Test::Command->new(cmd => "fping -A localhost");
+my $cmd = Test::Command->new(cmd => "fping -4 -A localhost");
 $cmd->exit_is_num(0);
 $cmd->stdout_is_eq("127.0.0.1 is alive\n");
 $cmd->stderr_is_eq("");
@@ -34,14 +85,17 @@ $cmd->stderr_is_eq("");
 }
 
 # fping -B
-{
-my $t0 = [gettimeofday];
-my $cmd = Test::Command->new(cmd => "fping  -t 100 -r 3 -B 2  8.8.8.7");
-$cmd->exit_is_num(1);
-$cmd->stdout_is_eq("8.8.8.7 is unreachable\n");
-$cmd->stderr_like(qr{^(|(8.8.8.7: error while sending ping: No route to host\n)+)$});
-my $elapsed = tv_interval($t0);
-# 0.1 + 0.2 + 0.4 + 0.8 = 1.5
-cmp_ok($elapsed, '>=', 1.5);
-cmp_ok($elapsed, '<', 1.8);
+SKIP: {
+    if($^O eq 'darwin') {
+        skip 'timing test not reliable on macOS', 5;
+    }
+    my $t0 = [gettimeofday];
+    my $cmd = Test::Command->new(cmd => "fping  -t 100 -r 3 -B 2  8.8.8.7");
+    $cmd->exit_is_num(1);
+    $cmd->stdout_is_eq("8.8.8.7 is unreachable\n");
+    $cmd->stderr_like(qr{^(|(8.8.8.7: error while sending ping: No route to host\n)+)$});
+    my $elapsed = tv_interval($t0);
+    # 0.1 + 0.2 + 0.4 + 0.8 = 1.5
+    cmp_ok($elapsed, '>=', 1.5);
+    cmp_ok($elapsed, '<', 1.9);
 }

ci/test-05-options-c-e.pl

@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 
-use Test::Command tests => 12;
+use Test::Command tests => 51;
 
 #  -c n       count of pings to send to each target (default 1)
 #  -C n       same as -c, report results in verbose format
@@ -9,31 +9,120 @@ use Test::Command tests => 12;
 
 # fping -c n
 {
-my $cmd = Test::Command->new(cmd => "fping -c 2 -p 100 localhost 127.0.0.1");
+my $cmd = Test::Command->new(cmd => "fping -4 -c 2 -p 100 localhost 127.0.0.1");
 $cmd->exit_is_num(0);
-$cmd->stdout_like(qr{localhost : \[0\], 84 bytes, 0\.\d+ ms \(0\.\d+ avg, 0% loss\)
-127\.0\.0\.1 : \[0\], 84 bytes, 0\.\d+ ms \(0.\d+ avg, 0% loss\)
-localhost : \[1\], 84 bytes, 0\.\d+ ms \(0\.\d+ avg, 0% loss\)
-127\.0\.0\.1 : \[1\], 84 bytes, 0\.\d+ ms \(0\.\d+ avg, 0% loss\)
+$cmd->stdout_like(qr{localhost : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+localhost : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
 });
 
-$cmd->stderr_like(qr{localhost : xmt/rcv/%loss = 2/2/0%, min/avg/max = 0\.\d+/0\.\d+/0\.\d+
-127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = 0\.\d+/0\.\d+/0\.\d+
+$cmd->stderr_like(qr{localhost : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+});
+}
+
+# fping -c n -q
+{
+my $cmd = Test::Command->new(cmd => "fping -q -c 2 -p 100 localhost 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{localhost : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+});
+}
+
+# fping -c n -a (-a is ignored)
+{
+my $cmd = Test::Command->new(cmd => "fping -a -c 2 -p 100 localhost 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_like(qr{localhost : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+localhost : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+});
+
+$cmd->stderr_like(qr{localhost : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+});
+}
+
+# fping -c n -u (-u is ignored)
+{
+my $cmd = Test::Command->new(cmd => "fping -u -c 2 -p 100 localhost 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_like(qr{localhost : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+localhost : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+});
+
+$cmd->stderr_like(qr{localhost : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
 });
 }
 
 # fping -C n
 {
-my $cmd = Test::Command->new(cmd => "fping -C 2 -p 100 localhost 127.0.0.1");
+my $cmd = Test::Command->new(cmd => "fping -4 -C 2 -p 100 localhost 127.0.0.1");
 $cmd->exit_is_num(0);
-$cmd->stdout_like(qr{localhost : \[0\], 84 bytes, 0\.\d+ ms \(0\.\d+ avg, 0% loss\)
-127\.0\.0\.1 : \[0\], 84 bytes, 0\.\d+ ms \(0.\d+ avg, 0% loss\)
-localhost : \[1\], 84 bytes, 0\.\d+ ms \(0\.\d+ avg, 0% loss\)
-127\.0\.0\.1 : \[1\], 84 bytes, 0\.\d+ ms \(0\.\d+ avg, 0% loss\)
+$cmd->stdout_like(qr{localhost : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+localhost : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
 });
 
-$cmd->stderr_like(qr{localhost : 0\.\d+ 0\.\d+
-127\.0\.0\.1 : 0\.\d+ 0\.\d+
+$cmd->stderr_like(qr{localhost : \d\.\d+ \d\.\d+
+127\.0\.0\.1 : \d\.\d+ \d\.\d+
+});
+}
+
+# fping -C n -q
+{
+my $cmd = Test::Command->new(cmd => "fping -C 5 -q -p 100 localhost");
+$cmd->exit_is_num(0);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{localhost :( \d\.\d+){5}
+});
+}
+
+# fping -C n -a (-a is ignored)
+{
+my $cmd = Test::Command->new(cmd => "fping -a -C 2 -p 100 localhost 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_like(qr{localhost : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+localhost : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+});
+
+$cmd->stderr_like(qr{localhost : \d\.\d+ \d\.\d+
+127\.0\.0\.1 : \d\.\d+ \d\.\d+
+});
+}
+
+# fping -C n -u (-u is ignored)
+{
+my $cmd = Test::Command->new(cmd => "fping -u -C 2 -p 100 localhost 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_like(qr{localhost : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+localhost : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+});
+
+$cmd->stderr_like(qr{localhost : \d\.\d+ \d\.\d+
+127\.0\.0\.1 : \d\.\d+ \d\.\d+
+});
+}
+
+# fping -C n -i -q
+{
+my $cmd = Test::Command->new(cmd => "fping --quiet --interval=1 --vcount=20 --period=50 127.0.0.1 127.0.0.2");
+$cmd->exit_is_num(0);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{127\.0\.0\.1 :( \d\.\d+){20}
+127\.0\.0\.2 :( \d\.\d+){20}
 });
 }
 
@@ -41,19 +130,82 @@ $cmd->stderr_like(qr{localhost : 0\.\d+ 0\.\d+
 {
 my $cmd = Test::Command->new(cmd => "fping -D -c 2 -p 100 127.0.0.1");
 $cmd->exit_is_num(0);
-$cmd->stdout_like(qr{\[\d{10}\.\d+\] 127\.0\.0\.1 : \[0\], 84 bytes, 0\.\d+ ms \(0.\d+ avg, 0% loss\)
-\[\d{10}\.\d+\] 127\.0\.0\.1 : \[1\], 84 bytes, 0\.\d+ ms \(0\.\d+ avg, 0% loss\)
+$cmd->stdout_like(qr{\[\d+\.\d+\] 127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+\[\d+\.\d+\] 127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+});
+
+$cmd->stderr_like(qr{127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+});
+}
+
+# fping -D (timestamp not before 2001-09-09)
+{
+my $cmd = Test::Command->new(cmd => "fping -D -c 2 -p 100 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_like(qr{\[[1-9]\d{9,}\.\d+\] 127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+\[[1-9]\d{9,}\.\d+\] 127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+});
+$cmd->stderr_like(qr{127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+});
+}
+
+# fping -D --timestamp-format=ctime
+{
+my $cmd = Test::Command->new(cmd => "fping -D --timestamp-format=ctime -c 2 -p 100 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_like(qr{\[\w+\s\w+\s+\d+\s[\d+:]+\s\d+\] 127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+\[\w+\s\w+\s+\d+\s[\d+:]+\s\d+\] 127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+});
+
+$cmd->stderr_like(qr{127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+});
+}
+
+# fping -D --timestamp-format=iso
+{
+my $cmd = Test::Command->new(cmd => "fping -D --timestamp-format=iso -c 2 -p 100 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_like(qr{\[[\d+-]+T[\d+:]+\+\d+\] 127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+\[[\d+-]+T[\d+:]+\+\d+\] 127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
 });
 
-$cmd->stderr_like(qr{127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = 0\.\d+/0\.\d+/0\.\d+
+$cmd->stderr_like(qr{127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
 });
 }
 
+# fping -D --timestamp-format=rfc3339
+{
+my $cmd = Test::Command->new(cmd => "fping -D --timestamp-format=rfc3339 -c 2 -p 100 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_like(qr{\[[\d+-]+\s[\d+:]+\] 127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+\[[\d+-]+\s[\d+:]+\] 127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+});
+
+$cmd->stderr_like(qr{127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+});
+}
+
+# fping -D --timestamp-format
+{
+my $cmd = Test::Command->new(cmd => "fping -D --timestamp-format -c 2 -p 100 127.0.0.1");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{Usage:});
+}
+
+# fping -D --timestamp-format="%Y-%m-%d %H:%M:%S"
+{
+my $cmd = Test::Command->new(cmd => "fping -D --timestamp-format=\"%Y-%m-%d %H:%M:%S\" -c 2 -p 100 127.0.0.1");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{Usage:});
+}
+
 # fping -e
 {
 my $cmd = Test::Command->new(cmd => "fping -e 127.0.0.1");
 $cmd->exit_is_num(0);
-$cmd->stdout_like(qr{127\.0\.0\.1 is alive \(0\.\d+ ms\)
+$cmd->stdout_like(qr{127\.0\.0\.1 is alive \(\d\.\d+ ms\)
 });
 
 $cmd->stderr_is_eq("");

ci/test-06-options-f-h.pl

@@ -1,6 +1,7 @@
 #!/usr/bin/perl -w
 
-use Test::Command tests => 24;
+use Test::Command tests => 75;
+use Test::More;
 use File::Temp;
 
 #  -f file    read list of targets from a file ( - means stdin) (only if no -g specified)
@@ -13,6 +14,10 @@ my $tmpfile = File::Temp->new();
 print $tmpfile "127.0.0.1\n127.0.0.2\n";
 close($tmpfile);
 
+my $tmpfile2 = File::Temp->new();
+print $tmpfile2 "# comment\n127.0.0.1\n\n127.0.0.2\n";
+close($tmpfile2);
+
 # fping without option (-> equivalent to 'fping -f -')
 {
 my $cmd = Test::Command->new(cmd => "cat ".$tmpfile->filename." | fping");
@@ -37,6 +42,70 @@ $cmd->stdout_is_eq("127.0.0.1 is alive\n127.0.0.2 is alive\n");
 $cmd->stderr_is_eq("");
 }
 
+# fping -f file (with comment and empty line)
+{
+my $cmd = Test::Command->new(cmd => "fping -f ".$tmpfile2->filename);
+$cmd->exit_is_num(0);
+$cmd->stdout_is_eq("127.0.0.1 is alive\n127.0.0.2 is alive\n");
+$cmd->stderr_is_eq("");
+}
+
+# fping -f non-existing-file (error)
+{
+my $cmd = Test::Command->new(cmd => "fping -f file-does-not-exist");
+$cmd->exit_is_num(4);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{: fopen :});
+}
+
+# fping -g (error: no argument)
+{
+my $cmd = Test::Command->new(cmd => "fping -g");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{^Usage: fping \[options\] \[targets\.\.\.\]});
+}
+
+# fping -g (error: single argument, but not in cidr format)
+{
+my $cmd = Test::Command->new(cmd => "fping -g 127.0.0.1");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{^Usage: fping \[options\] \[targets\.\.\.\]});
+}
+
+# fping -g (error: CIDR network is not an IP address)
+{
+my $cmd = Test::Command->new(cmd => "fping -g xxx/32");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{can't parse address xxx});
+}
+
+# fping -g (error: start of range is not an IP address)
+{
+my $cmd = Test::Command->new(cmd => "fping -g xxx 127.0.0.1");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{can't parse address xxx});
+}
+
+# fping -g (error: end of range is not an IP address)
+{
+my $cmd = Test::Command->new(cmd => "fping -g 127.0.0.1 yyy");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{can't parse address yyy});
+}
+
+# fping -g (error: too many arguments)
+{
+my $cmd = Test::Command->new(cmd => "fping -g 127.0.0.1 127.0.0.2 127.0.0.3");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{^Usage: fping \[options\] \[targets\.\.\.\]});
+}
+
 # fping -g (range)
 {
 my $cmd = Test::Command->new(cmd => "fping -g 127.0.0.1 127.0.0.5");
@@ -45,6 +114,22 @@ $cmd->stdout_is_eq("127.0.0.1 is alive\n127.0.0.2 is alive\n127.0.0.3 is alive\n
 $cmd->stderr_is_eq("");
 }
 
+# fping -g (empty range)
+{
+my $cmd = Test::Command->new(cmd => "fping -g 127.0.0.2 127.0.0.1");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_is_eq("");
+}
+
+# fping -g (too large range)
+{
+my $cmd = Test::Command->new(cmd => "fping -g 127.0.0.1 127.255.255.254");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_is_eq("fping: -g parameter generates too many addresses\n");
+}
+
 # fping -g (cidr)
 {
 my $cmd = Test::Command->new(cmd => "fping -g 127.0.0.1/30");
@@ -53,7 +138,7 @@ $cmd->stdout_is_eq("127.0.0.1 is alive\n127.0.0.2 is alive\n");
 $cmd->stderr_is_eq("");
 }
 
-# fping -g (cidr - long prefixes)
+# fping -g (cidr - long prefixes: point-to-point)
 {
 my $cmd = Test::Command->new(cmd => "fping -g 127.0.0.2/31");
 $cmd->exit_is_num(0);
@@ -61,12 +146,80 @@ $cmd->stdout_is_eq("127.0.0.2 is alive\n127.0.0.3 is alive\n");
 $cmd->stderr_is_eq("");
 }
 
+# fping -g (cidr - long prefixes: host)
+{
+my $cmd = Test::Command->new(cmd => "fping -g 127.0.0.2/32");
+$cmd->exit_is_num(0);
+$cmd->stdout_is_eq("127.0.0.2 is alive\n");
+$cmd->stderr_is_eq("");
+}
+
 # fping -g (cidr - too long prefixes)
 {
 my $cmd = Test::Command->new(cmd => "fping -g 127.0.0.2/33");
 $cmd->exit_is_num(1);
 $cmd->stdout_is_eq("");
-$cmd->stderr_is_eq("Error: netmask must be between 1 and 32 (is: 33)\n");
+$cmd->stderr_is_eq("fping: netmask must be between 1 and 32 (is: 33)\n");
+}
+
+# fping -g (cidr - too short prefixes)
+{
+my $cmd = Test::Command->new(cmd => "fping -g 127.0.0.2/0");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_is_eq("fping: netmask must be between 1 and 32 (is: 0)\n");
+}
+
+# fping -g (cidr - too many addresses)
+{
+my $cmd = Test::Command->new(cmd => "fping -g 127.0.0.0/8");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_is_eq("fping: -g parameter generates too many addresses\n");
+}
+
+# fping -g (range - no IPv6 generator)
+SKIP: {
+    if($ENV{SKIP_IPV6}) {
+        skip 'Skip IPv6 tests', 3;
+    }
+    my $cmd = Test::Command->new(cmd => "fping -6 -g ::1 ::1");
+    $cmd->exit_is_num(1);
+    $cmd->stdout_is_eq("");
+    $cmd->stderr_is_eq("fping: -g works only with IPv4 addresses\n");
+}
+
+# fping -g (range - no IPv6 generator - start address IPv6)
+SKIP: {
+    if($ENV{SKIP_IPV6}) {
+        skip 'Skip IPv6 tests', 3;
+    }
+    my $cmd = Test::Command->new(cmd => "fping -6 -g ::1 127.0.0.1");
+    $cmd->exit_is_num(1);
+    $cmd->stdout_is_eq("");
+    $cmd->stderr_is_eq("fping: -g works only with IPv4 addresses\n");
+}
+
+# fping -g (range - no IPv6 generator - end address IPv6)
+SKIP: {
+    if($ENV{SKIP_IPV6}) {
+        skip 'Skip IPv6 tests', 3;
+    }
+    my $cmd = Test::Command->new(cmd => "fping -6 -g 127.0.0.1 ::1");
+    $cmd->exit_is_num(1);
+    $cmd->stdout_is_eq("");
+    $cmd->stderr_is_eq("fping: -g works only with IPv4 addresses\n");
+}
+
+# fping -g (CIDR - no IPv6 generator)
+SKIP: {
+    if($ENV{SKIP_IPV6}) {
+        skip 'Skip IPv6 tests', 3;
+    }
+    my $cmd = Test::Command->new(cmd => "fping -6 -g ::1/128");
+    $cmd->exit_is_num(1);
+    $cmd->stdout_is_eq("");
+    $cmd->stderr_is_eq("fping: -g works only with IPv4 addresses\n");
 }
 
 # fping -H

ci/test-07-options-i-m.pl

@@ -1,10 +1,11 @@
 #!/usr/bin/perl -w
 
-use Test::Command tests => 7;
+use Test::Command tests => 15;
 use Test::More;
 
 #  -i n       interval between sending ping packets (in millisec) (default 25)
 #  -l         loop sending pings forever
+#  -k         set fwmark on ping packets
 #  -m         ping multiple interfaces on target host
 #  -M         don't fragment
 
@@ -19,8 +20,55 @@ $cmd->stderr_is_eq("");
 # fping -l
 {
 my $cmd = Test::Command->new(cmd => '(sleep 2; pkill fping)& fping -p 900 -l 127.0.0.1');
-$cmd->stdout_like(qr{127\.0\.0\.1 : \[0\], 84 bytes, 0\.\d+ ms \(0.\d+ avg, 0% loss\)
-127\.0\.0\.1 : \[1\], 84 bytes, 0\.\d+ ms \(0\.\d+ avg, 0% loss\)
+$cmd->stdout_like(qr{127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+});
+}
+
+# fping -k
+SKIP: {
+if($^O ne 'linux') {
+    skip '-k option is only supported on Linux', 3;
+}
+my $cmd = Test::Command->new(cmd => 'sudo env "PATH=$PATH" fping -k 256 127.0.0.1');
+$cmd->exit_is_num(0);
+$cmd->stdout_is_eq("127.0.0.1 is alive\n");
+$cmd->stderr_is_eq("");
+}
+
+# fping -l with SIGQUIT
+{
+my $cmd = Test::Command->new(cmd => '(sleep 2; pkill -QUIT fping; sleep 2; pkill fping)& fping -p 900 -l 127.0.0.1');
+$cmd->stdout_like(qr{127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[2\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[3\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[4\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+});
+$cmd->stderr_like(qr{\[\d+:\d+:\d+\]
+127\.0\.0\.1 : xmt/rcv/%loss = \d+/\d+/\d+%, min/avg/max = \d+\.\d+/\d+\.\d+/\d+\.\d+
+});
+}
+
+# fping -l -Q
+SKIP: {
+if($^O eq 'darwin') {
+    skip 'On macOS, this test is unreliable', 2;
+}
+my $cmd = Test::Command->new(cmd => '(sleep 2; pkill fping)& fping -p 850 -l -Q 1 127.0.0.1');
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{\[\d\d:\d\d:\d\d\]
+127\.0\.0\.1 : xmt/rcv/%loss = \d/\d/\d%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+\[\d\d:\d\d:\d\d\]
+127\.0\.0\.1 : xmt/rcv/%loss = \d/\d/\d%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+});
+}
+
+# fping -l -t
+{
+my $cmd = Test::Command->new(cmd => '(sleep 2; pkill fping)& fping -p 900 -t 1500 -l 127.0.0.1');
+$cmd->stdout_like(qr{127\.0\.0\.1 : \[0\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
+127\.0\.0\.1 : \[1\], 64 bytes, \d\.\d+ ms \(\d\.\d+ avg, 0% loss\)
 });
 }
 

ci/test-08-options-n-q.pl

@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 
-use Test::Command tests => 12;
+use Test::Command tests => 36;
 
 #  -n         show targets by name (-d is equivalent)
 #  -O n       set the type of service (tos) flag on the ICMP packets
@@ -11,11 +11,32 @@ use Test::Command tests => 12;
 
 # fping -n -> test-14-internet-hosts
 
+# fping -d -n
+{
+my $cmd = Test::Command->new(cmd => "fping -d -n 127.0.0.1");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_is_eq("fping: use either one of -d or -n\n");
+}
+
+# fping -n -d
+{
+my $cmd = Test::Command->new(cmd => "fping -n -d 127.0.0.1");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_is_eq("fping: use either one of -d or -n\n");
+}
+
 # fping -o
 {
 my $cmd = Test::Command->new(cmd => "fping -t100 -p 100 -o -c 5 8.8.8.7");
 $cmd->exit_is_num(1);
-$cmd->stdout_is_eq("");
+$cmd->stdout_is_eq("8.8.8.7 : [0], timed out (NaN avg, 100% loss)
+8.8.8.7 : [1], timed out (NaN avg, 100% loss)
+8.8.8.7 : [2], timed out (NaN avg, 100% loss)
+8.8.8.7 : [3], timed out (NaN avg, 100% loss)
+8.8.8.7 : [4], timed out (NaN avg, 100% loss)
+");
 $cmd->stderr_like(qr{^\s*8\.8\.8\.7 : xmt/rcv/%loss = 5/0/100%, outage\(ms\) = 50\d\s*$});
 }
 
@@ -32,7 +53,7 @@ $cmd->stderr_is_eq("");
 my $cmd = Test::Command->new(cmd => "fping -q -p 100 -c 3 127.0.0.1");
 $cmd->exit_is_num(0);
 $cmd->stdout_is_eq("");
-$cmd->stderr_like(qr{127\.0\.0\.1 : xmt/rcv/%loss = 3/3/0%, min/avg/max = 0\.\d+/0\.\d+/0\.\d+
+$cmd->stderr_like(qr{127\.0\.0\.1 : xmt/rcv/%loss = 3/3/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
 });
 }
 
@@ -42,9 +63,86 @@ my $cmd = Test::Command->new(cmd => "fping -Q 1 -p 400 -c 4 127.0.0.1");
 $cmd->exit_is_num(0);
 $cmd->stdout_is_eq("");
 $cmd->stderr_like(qr{\[\d+:\d+:\d+\]
-127\.0\.0\.1 : xmt/rcv/%loss = 3/3/0%, min/avg/max = 0\.\d+/0\.\d+/0\.\d+
-127\.0\.0\.1 : xmt/rcv/%loss = 4/4/0%, min/avg/max = 0\.\d+/0\.\d+/0\.\d+
+127\.0\.0\.1 : xmt/rcv/%loss = 3/3/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+127\.0\.0\.1 : xmt/rcv/%loss = 4/4/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+});
+}
+
+# fping -Q (longer test to show two time stamps and reset statistics)
+{
+my $cmd = Test::Command->new(cmd => "fping -Q 1 -p 550 -c 5 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{\[\d+:\d+:\d+\]
+127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+\[\d+:\d+:\d+\]
+127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+127\.0\.0\.1 : xmt/rcv/%loss = 5/5/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+});
+}
+
+# fping -Q n ignores non-number characters after the number, except for keywords
+{
+my $cmd = Test::Command->new(cmd => "fping -Q 1whatever -p 550 -c 5 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{\[\d+:\d+:\d+\]
+127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+\[\d+:\d+:\d+\]
+127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+127\.0\.0\.1 : xmt/rcv/%loss = 5/5/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+});
+}
+
+# fping -Q n ignores unknown keywords
+{
+my $cmd = Test::Command->new(cmd => "fping -Q 1,not_a_keyword -p 550 -c 5 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{\[\d+:\d+:\d+\]
+127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+\[\d+:\d+:\d+\]
+127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+127\.0\.0\.1 : xmt/rcv/%loss = 5/5/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+});
+}
+
+# fping -Q n,cumulative
+{
+my $cmd = Test::Command->new(cmd => "fping -Q 1,cumulative -p 550 -c 5 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{\[\d+:\d+:\d+\]
+127\.0\.0\.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+\[\d+:\d+:\d+\]
+127\.0\.0\.1 : xmt/rcv/%loss = 4/4/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
+127\.0\.0\.1 : xmt/rcv/%loss = 5/5/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+
 });
 }
 
+# fping -Q -o
+{
+my $cmd = Test::Command->new(cmd => "fping -c4 -Q1 -p550 -o 8.8.8.7");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{\[\d+:\d+:\d+\]
+8\.8\.8\.7 : xmt/rcv/%loss = 1/0/100%, outage\(ms\) = 55\d
+\[\d+:\d+:\d+\]
+8\.8\.8\.7 : xmt/rcv/%loss = 2/0/100%, outage\(ms\) = 110\d
+8\.8\.8\.7 : xmt/rcv/%loss = 4/0/100%, outage\(ms\) = 220\d
+});
+}
+
+# fping -Q n,cumulative -o
+{
+my $cmd = Test::Command->new(cmd => "fping -c4 -Q1,cumulative -p550 -o 8.8.8.7");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{\[\d+:\d+:\d+\]
+8\.8\.8\.7 : xmt/rcv/%loss = 1/0/100%, outage\(ms\) = 55\d
+\[\d+:\d+:\d+\]
+8\.8\.8\.7 : xmt/rcv/%loss = 3/0/100%, outage\(ms\) = 165\d
+8\.8\.8\.7 : xmt/rcv/%loss = 4/0/100%, outage\(ms\) = 220\d
+});
+}
 

ci/test-09-option-r-t.pl

@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 
-use Test::Command tests => 18;
+use Test::Command tests => 27;
 use Test::More;
 
 #  -R         random bytes
@@ -19,10 +19,10 @@ $cmd->stderr_like(qr{127\.0\.0\.1 : xmt/rcv/%loss = 3/3/0%.*});
 }
 
 SKIP: {
-    if(system("/sbin/ifconfig | grep inet6") != 0) {
-        skip 'No IPv6 on this host', 3;
+    if($ENV{SKIP_IPV6}) {
+        skip 'Skip IPv6 tests', 3;
     }
-    my $cmd = Test::Command->new(cmd => "fping6 -q -R -c3 -p100 ::1");
+    my $cmd = Test::Command->new(cmd => "fping -q -R -c3 -p100 ::1");
     $cmd->exit_is_num(0);
     $cmd->stdout_is_eq("");
     $cmd->stderr_like(qr{::1 : xmt/rcv/%loss = 3/3/0%.*});
@@ -46,10 +46,10 @@ $cmd->stderr_like(qr{\s*
 \s*1 ICMP Echo Replies received
 \s*0 other ICMP received
 
-\s*0.\d+ ms \(min round trip time\)
-\s*0.\d+ ms \(avg round trip time\)
-\s*0.\d+ ms \(max round trip time\)
-\s*0.\d+ sec \(elapsed real time\)
+\s*\d\.\d+ ms \(min round trip time\)
+\s*\d\.\d+ ms \(avg round trip time\)
+\s*\d\.\d+ ms \(max round trip time\)
+\s*\d\.\d+ sec \(elapsed real time\)
 });
 }
 
@@ -69,10 +69,10 @@ $cmd->stderr_like(qr{\s*
 \s*0 ICMP Echo Replies received
 \s*0 other ICMP received
 
-\s*0.\d+ ms \(min round trip time\)
-\s*0.\d+ ms \(avg round trip time\)
-\s*0.\d+ ms \(max round trip time\)
-\s*0.\d+ sec \(elapsed real time\)
+\s*\d\.\d+ ms \(min round trip time\)
+\s*\d\.\d+ ms \(avg round trip time\)
+\s*\d\.\d+ ms \(max round trip time\)
+\s*\d\.\d+ sec \(elapsed real time\)
 });
 }
 
@@ -84,15 +84,42 @@ $cmd->stdout_is_eq("127.0.0.1 is alive\n");
 $cmd->stderr_is_eq("");
 }
 
-# fping6 -S
+# fping -S (wrong source address)
+{
+my $cmd = Test::Command->new(cmd => "fping -S 192.0.2.47 127.0.0.1");
+$cmd->exit_is_num(4);
+$cmd->stdout_is_eq("");
+$cmd->stderr_like(qr{fping: cannot bind source address : .+\n});
+}
+
+# fping -S
 SKIP: {
-    if(system("/sbin/ifconfig | grep inet6") != 0) {
-        skip 'No IPv6 on this host', 3;
+    if($ENV{SKIP_IPV6}) {
+        skip 'Skip IPv6 tests', 3;
     }
-    my $cmd = Test::Command->new(cmd => "fping6 -S ::1 ::1");
+    my $cmd = Test::Command->new(cmd => "fping -S ::1 ::1");
     $cmd->exit_is_num(0);
     $cmd->stdout_is_eq("::1 is alive\n");
     $cmd->stderr_is_eq("");
 }
 
-# fping -t tested in test-4-options-a-b.pl
+# fping -S (wrong IPv6 source address)
+SKIP: {
+    if($ENV{SKIP_IPV6}) {
+        skip 'Skip IPv6 tests', 3;
+    }
+    my $cmd = Test::Command->new(cmd => "fping -S 2001:db8::1 ::1");
+    $cmd->exit_is_num(4);
+    $cmd->stdout_is_eq("");
+    $cmd->stderr_like(qr{fping: cannot bind source address : .+\n});
+}
+
+# fping -S
+{
+my $cmd = Test::Command->new(cmd => "fping -S bla");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("");
+$cmd->stderr_is_eq("fping: can't parse source address: bla\n");
+}
+
+# (note: fping -t also tested in test-4-options-a-b.pl)

ci/test-10-option-u-v.pl

@@ -1,24 +0,0 @@
-#!/usr/bin/perl -w
-
-use Test::Command tests => 6;
-
-#  -u         show targets that are unreachable
-#  -v         show version
-
-# fping -u
-{
-my $cmd = Test::Command->new(cmd => "fping -r0 -u 8.8.0.0 127.0.0.1");
-$cmd->exit_is_num(1);
-$cmd->stdout_is_eq("8.8.0.0\n");
-$cmd->stderr_is_eq("");
-}
-
-# fping -v
-{
-my $cmd = Test::Command->new(cmd => "fping -v");
-$cmd->exit_is_num(0);
-$cmd->stdout_like(qr{ping: Version 3\.\d+(-rc\d+)?
-fping: comments to david\@schweikert\.ch
-});
-$cmd->stderr_is_eq("");
-}

ci/test-10-option-u-x.pl

@@ -0,0 +1,48 @@
+#!/usr/bin/perl -w
+
+use Test::Command tests => 15;
+
+#  -u         show targets that are unreachable
+#  -v         show version
+#  -x         shows if >=N hosts are reachable or not
+#  -X         exits true immediately when N hosts are found
+
+# fping -u
+{
+my $cmd = Test::Command->new(cmd => "fping -r0 -u 8.8.0.0 127.0.0.1");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("8.8.0.0\n");
+$cmd->stderr_is_eq("");
+}
+
+# fping -v
+{
+my $cmd = Test::Command->new(cmd => "fping -v");
+$cmd->exit_is_num(0);
+$cmd->stdout_like(qr{ping: Version [45]\.\d+(-rc\d+)?});
+$cmd->stderr_is_eq("");
+}
+
+# fping -x
+{
+my $cmd = Test::Command->new(cmd => "fping -x 1 8.8.0.0 127.0.0.1");
+$cmd->exit_is_num(0);
+$cmd->stdout_is_eq("Enough hosts reachable (required: 1, reachable: 1)\n");
+$cmd->stderr_is_eq("");
+}
+
+# fping -x
+{
+my $cmd = Test::Command->new(cmd => "fping -x 2 8.8.0.0 127.0.0.1");
+$cmd->exit_is_num(1);
+$cmd->stdout_is_eq("Not enough hosts reachable (required: 2, reachable: 1)\n");
+$cmd->stderr_is_eq("");
+}
+
+# fping -X
+{
+my $cmd = Test::Command->new(cmd => "fping -X 1 --generate 127.0.0.0/29");
+$cmd->exit_is_num(0);
+$cmd->stdout_is_eq("Enough hosts reachable (required: 1, reachable: 1)\n");
+$cmd->stderr_is_eq("");
+}

ci/test-11-nopriv.pl

@@ -1,32 +0,0 @@
-#!/usr/bin/perl -w
-
-use Test::Command;
-use Test::More;
-
-if( $^O eq 'darwin' ) {
-    plan skip_all => 'Test irrelevant on MacOS';
-    exit 0;
-}
-plan tests => 6;
-
-# run without privileges
-my $fping_bin = `which fping`; chomp $fping_bin;
-my $fping6_bin = `which fping6`; chomp $fping6_bin;
-system("cp $fping_bin /tmp/fping.copy; chmod +x /tmp/fping.copy");
-system("cp $fping6_bin /tmp/fping6.copy; chmod +x /tmp/fping6.copy");
-
-# fping
-{
-my $cmd = Test::Command->new(cmd => "/tmp/fping.copy 127.0.0.1");
-$cmd->exit_is_num(4);
-$cmd->stdout_is_eq("");
-$cmd->stderr_like(qr{: can't create socket \(must run as root\?\) : .*\n});
-}
-
-# fping6
-{
-my $cmd = Test::Command->new(cmd => "/tmp/fping6.copy ::1");
-$cmd->exit_is_num(4);
-$cmd->stdout_is_eq("");
-$cmd->stderr_like(qr{: can't create raw socket \(must run as root\?\) : .*\n});
-}

ci/test-11-unpriv.pl

@@ -0,0 +1,57 @@
+#!/usr/bin/perl -w
+
+use English;
+use Test::Command;
+use Test::More;
+
+if( $^O eq 'darwin' ) {
+    plan skip_all => 'Test irrelevant on MacOS';
+    exit 0;
+}
+
+sub get_ping_gid_range {
+    open FD, "/proc/sys/net/ipv4/ping_group_range" or return undef;
+    chomp(my $line = <FD>);
+    my @range = split(/\s+/, $line);
+    close FD;
+    return @range;
+}
+
+my @gids = split(' ', $EGID);
+my @allowed = get_ping_gid_range();
+
+# Make a copy of the binary so that we get rid of setuid bit
+my $fping_bin = `which fping`; chomp $fping_bin;
+system("cp $fping_bin /tmp/fping.copy; chmod +x /tmp/fping.copy");
+
+# Determine what test to run, based on whether unprivileged
+# pings are allowed.
+if(scalar grep { $_ >= $allowed[0] && $_ <= $allowed[1] } @gids) {
+    diag('test unprivileged mode');
+    test_unprivileged_works();
+}
+else {
+    test_privileged_fails();
+}
+
+sub test_unprivileged_works {
+    plan tests => 3;
+
+    {
+        my $cmd = Test::Command->new(cmd => "fping 127.0.0.1");
+        $cmd->exit_is_num(0);
+        $cmd->stdout_is_eq("127.0.0.1 is alive\n");
+        $cmd->stderr_is_eq("");
+    }
+}
+
+sub test_privileged_fails {
+    plan tests => 3;
+
+    {
+        my $cmd = Test::Command->new(cmd => "/tmp/fping.copy 127.0.0.1");
+        $cmd->exit_is_num(4);
+        $cmd->stdout_is_eq("");
+        $cmd->stderr_like(qr{: can't create socket \(must run as root\?\)});
+    }
+}

ci/test-12-option-type.pl

@@ -1,10 +1,27 @@
 #!/usr/bin/perl -w
 
-use Test::Command tests => 33;
+use Test::Command tests => 84;
+use Test::More;
 
-for my $arg (qw(b B c C H i O p Q r t)) {
-    my $cmd = Test::Command->new(cmd => "fping -$arg xxx");
+# some options require a numeric argument
+for my $arg (qw(b B c C H i O p Q r t x X)) {
+    for my $test_input (qw(xxx '')) {
+        my $cmd = Test::Command->new(cmd => "fping -$arg $test_input");
         $cmd->exit_is_num(1);
         $cmd->stdout_is_eq("");
         $cmd->stderr_like(qr{Usage:});
+    }
+}
+
+# fping -k, only supported on Linux, requires a number
+SKIP: {
+    if($^O ne 'linux') {
+        skip '-k option is only supported on Linux', 6;
+    }
+    for my $test_input (qw(xxx '')) {
+        my $cmd = Test::Command->new(cmd => "fping -k $test_input 127.0.0.1");
+        $cmd->exit_is_num(1);
+        $cmd->stdout_is_eq("");
+        $cmd->stderr_like(qr{Usage:});
+    }
 }

ci/test-13-unknown-host.pl

@@ -1,6 +1,6 @@
 #!/usr/bin/perl -w
 
-use Test::Command tests => 6;
+use Test::Command tests => 3;
 
 # fping
 {
@@ -9,11 +9,3 @@ $cmd->exit_is_num(2);
 $cmd->stdout_is_eq("");
 $cmd->stderr_like(qr{^nosuchname\.example\.com: .*not (known|found)});
 }
-
-# fping6
-{
-my $cmd = Test::Command->new(cmd => "fping6 nosuchname.example.com");
-$cmd->exit_is_num(2);
-$cmd->stdout_is_eq("");
-$cmd->stderr_like(qr{^nosuchname\.example\.com: .*not (known|found)});
-}

ci/test-14-ping-internet-hosts.pl

@@ -9,19 +9,18 @@ if(!gethostbyname("www.google.com")) {
     exit 0;
 }
 
-plan tests => 18;
+plan tests => 30;
 
 my $re_num = qr{\d+(?:\.\d+)?};
 
 # fping
 {
-my $cmd = Test::Command->new(cmd => "fping -q -i 10 -p 20 -c 3 -t200  8.8.8.8 4.2.2.5 www.france-telecom.fr www.google.com");
+my $cmd = Test::Command->new(cmd => "fping -q -i 10 -p 20 -c 3 -t200  8.8.8.8 www.france-telecom.fr www.google.com");
 $cmd->exit_is_num(0);
 $cmd->stdout_is_eq("");
-$cmd->stderr_like(qr{8\.8\.8\.8\s*: xmt/rcv/%loss = [123]/3/\d+%, min/avg/max = $re_num/$re_num/$re_num
-4\.2\.2\.5\s*: xmt/rcv/%loss = [123]/3/\d+%, min/avg/max = $re_num/$re_num/$re_num
-www\.france-telecom\.fr\s*: xmt/rcv/%loss = [123]/3/\d+%, min/avg/max = $re_num/$re_num/$re_num
-www\.google\.com\s*: xmt/rcv/%loss = [123]/3/\d+%, min/avg/max = $re_num/$re_num/$re_num
+$cmd->stderr_like(qr{8\.8\.8\.8\s*: xmt/rcv/%loss = [123]/[123]/\d+%, min/avg/max = $re_num/$re_num/$re_num
+www\.france-telecom\.fr\s*: xmt/rcv/%loss = [123]/[123]/\d+%, min/avg/max = $re_num/$re_num/$re_num
+www\.google\.com\s*: xmt/rcv/%loss = [123]/[123]/\d+%, min/avg/max = $re_num/$re_num/$re_num
 });
 }
 
@@ -29,45 +28,69 @@ www\.google\.com\s*: xmt/rcv/%loss = [123]/3/\d+%, min/avg/max = $re_num/$re_num
 {
 my $cmd = Test::Command->new(cmd => "fping -A -n 8.8.8.8");
 $cmd->exit_is_num(0);
-$cmd->stdout_is_eq("google-public-dns-a.google.com (8.8.8.8) is alive\n");
+$cmd->stdout_is_eq("dns.google (8.8.8.8) is alive\n");
 $cmd->stderr_is_eq("");
 }
 
-# fping -A -n
+# fping -4 -A -n
+{
+my $cmd = Test::Command->new(cmd => "fping -4 -A -n dns.google");
+$cmd->exit_is_num(0);
+$cmd->stdout_like(qr{^dns.google \(8\.8\.(4\.4|8\.8)\) is alive\n$});
+$cmd->stderr_is_eq("");
+}
+
+# fping -4 --addr --rdns
+{
+my $cmd = Test::Command->new(cmd => "fping -4 --addr --rdns www.apple.com");
+$cmd->exit_is_num(0);
+$cmd->stdout_like(qr{^\S+\.akamaitechnologies\.com \(\d+\.\d+\.\d+\.\d+\) is alive\n$});
+$cmd->stderr_is_eq("");
+}
+
+# fping -4 --addr --name
 {
-my $cmd = Test::Command->new(cmd => "fping -A -n google-public-dns-a.google.com");
+my $cmd = Test::Command->new(cmd => "fping -4 --addr --name www.google.com");
 $cmd->exit_is_num(0);
-$cmd->stdout_is_eq("google-public-dns-a.google.com (8.8.8.8) is alive\n");
+$cmd->stdout_like(qr{^www\.google\.com \(\d+\.\d+\.\d+\.\d+\) is alive\n$});
 $cmd->stderr_is_eq("");
 }
 
-# fping6 -A -n
+# fping -A -n (IPv6)
 SKIP: {
-    if(system("/sbin/ifconfig | grep inet6.*Scope:Global") != 0) {
-        skip 'No IPv6 on this host', 3;
+    if($ENV{SKIP_IPV6}) {
+        skip 'Skip IPv6 tests', 3;
     }
-    my $cmd = Test::Command->new(cmd => "fping6 -n -A 2001:4860:4860::8888");
+    my $cmd = Test::Command->new(cmd => "fping -6 -n -A dns.google");
     $cmd->exit_is_num(0);
-    $cmd->stdout_is_eq("google-public-dns-a.google.com (2001:4860:4860::8888) is alive\n");
+    $cmd->stdout_like(qr{^dns.google \(2001:4860:4860::88(44|88)\) is alive\n$});
     $cmd->stderr_is_eq("");
 }
 
 # fping -m
-#SKIP: {
-#    if(system("/sbin/ifconfig | grep inet6.*Scope:Global") != 0) {
-#        skip 'No IPv6 on this host', 3;
-#    }
-#    my $cmd = Test::Command->new(cmd => "fping -A -m google-public-dns-a.google.com");
-#    $cmd->exit_is_num(0);
-#    $cmd->stdout_is_eq("2001:4860:4860::8888 is alive\n8.8.8.8 is alive\n");
-#    $cmd->stderr_is_eq("");
-#}
+SKIP: {
+    if($ENV{SKIP_IPV6}) {
+        skip 'Skip IPv6 tests', 3;
+    }
+    my $cmd = Test::Command->new(cmd => "fping -A -m dns.google");
+    $cmd->exit_is_num(0);
+    $cmd->stdout_like(qr{^.* is alive\n.* is alive\n.* is alive\n.* is alive\n});
+    $cmd->stderr_is_eq("");
+}
+
+# fping -m -A
+{
+my $cmd = Test::Command->new(cmd => "fping -4 -A -m www.cloudflare.com");
+$cmd->exit_is_num(0);
+$cmd->stdout_like(qr{\d+\.\d+\.\d+\.\d+ is alive\n\d+\.\d+\.\d+\.\d+ is alive\n});
+$cmd->stderr_is_eq("");
+}
 
 # fping -n
 {
 my $cmd = Test::Command->new(cmd => "fping -n 8.8.8.8");
 $cmd->exit_is_num(0);
-$cmd->stdout_is_eq("google-public-dns-a.google.com is alive\n");
+$cmd->stdout_is_eq("dns.google is alive\n");
 $cmd->stderr_is_eq("");
 }
 

ci/test-15-netdata.pl

@@ -9,27 +9,27 @@ plan tests => 3;
 {
 my $cmd = Test::Command->new(cmd => "fping -c 2 -Q 1 -N 127.0.0.1");
 $cmd->exit_is_num(0);
-$cmd->stdout_like(qr{CHART fping\.127_0_0_1_packets '' 'FPing Packets for host 127\.0\.0\.1' packets '127_0_0_1' fping\.packets line 110020 1
+$cmd->stdout_like(qr{CHART fping\.127_0_0_1_packets '' 'FPing Packets' packets '127.0.0.1' fping\.packets line 110020 1
 DIMENSION xmt sent absolute 1 1
 DIMENSION rcv received absolute 1 1
 BEGIN fping\.127_0_0_1_packets
 SET xmt = 1
 SET rcv = 1
 END
-CHART fping\.127_0_0_1_quality '' 'FPing Quality for host 127\.0\.0\.1' percentage '127_0_0_1' fping\.quality area 110010 1
+CHART fping\.127_0_0_1_quality '' 'FPing Quality' percentage '127.0.0.1' fping\.quality area 110010 1
 DIMENSION returned '' absolute 1 1
 BEGIN fping\.127_0_0_1_quality
 SET returned = 100
 END
-CHART fping\.127_0_0_1_latency '' 'FPing Latency for host 127\.0\.0\.1' ms '127_0_0_1' fping\.latency area 110000 1
-DIMENSION min minimum absolute 10 1000
-DIMENSION max maximum absolute 10 1000
-DIMENSION avg average absolute 10 1000
+CHART fping\.127_0_0_1_latency '' 'FPing Latency' ms '127.0.0.1' fping\.latency area 110000 1
+DIMENSION min minimum absolute 1 1000000
+DIMENSION max maximum absolute 1 1000000
+DIMENSION avg average absolute 1 1000000
 BEGIN fping\.127_0_0_1_latency
-SET min = \d{1,2}
-SET avg = \d{1,2}
-SET max = \d{1,2}
+SET min = \d+
+SET avg = \d+
+SET max = \d+
 END}
 );
-$cmd->stderr_like(qr{127.0.0.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = 0.\d+/0.\d+/0.\d+});
+$cmd->stderr_like(qr{127.0.0.1 : xmt/rcv/%loss = 2/2/0%, min/avg/max = \d\.\d+/\d\.\d+/\d\.\d+});
 }

ci/test-issue-58.pl

@@ -7,4 +7,4 @@ use Test::Command tests => 3;
 my $cmd1 = Test::Command->new(cmd => "fping -a -g 2001:db8:120:4161::4/64");
 $cmd1->exit_is_num(1);
 $cmd1->stdout_is_eq("");
-$cmd1->stderr_is_eq("Error: -g works only with IPv4 addresses\n");
+$cmd1->stderr_is_eq("fping: -g works only with IPv4 addresses\n");

ci/test-tarball.sh

@@ -6,6 +6,11 @@
 set -e
 set -x
 
+# skip on macos
+if [[ "$OSTYPE" == "darwin"* ]]; then
+    exit 0
+fi
+
 make dist
 VERSION=$(ls fping-*.tar.gz | sed -e 's/^fping-//' | sed -e 's/\.tar\.gz$//')
 if [ -z "$VERSION" ]; then

configure.ac

@@ -3,43 +3,75 @@ dnl Process this file with autoconf to produce a configure script.
 dnl Minimum Autoconf version required.
 AC_PREREQ(2.59)
 
-AC_INIT([fping],[3.16])
+AC_INIT([fping],[5.2])
 
-dnl make ipv4 and ipv6 options
+m4_ifdef([AC_AUTOCONF_VERSION],[AC_USE_SYSTEM_EXTENSIONS], [AC_GNU_SOURCE])
+
+# Detect Operatingsystem
+AC_CANONICAL_TARGET
+only_clock_realtime=no
+
+case "${target}" in
+  *darwin*)
+    only_clock_realtime=yes
+    ;;
+  *freebsd*)
+    only_clock_realtime=yes
+    ;;
+  *openbsd*)
+    only_clock_realtime=yes
+    ;;
+esac
+
+dnl --disable-ipv4
 AC_ARG_ENABLE([ipv4],
-  [  --enable-ipv4    Build IPv4 capable fping],
-  [case "${enableval}" in
-   yes)	ipv4=true ;;
-   no)	ipv4=false ;;
-   *)	AC_MSG_ERROR([bad value ${enableval} for --enable-ipv4]) ;;
-   esac],[ipv4=true])
-  AM_CONDITIONAL([IPV4], [test x$ipv4 = xtrue])
+  AS_HELP_STRING([--disable-ipv4], [Disable support for pinging IPv4 hosts]))
+AM_CONDITIONAL([IPV4], [test "x$enable_ipv4" != "xno"])
+AM_COND_IF([IPV4], [AC_DEFINE([IPV4], [1], [IPv4 enabled])])
 
+dnl --disable-ipv6
 AC_ARG_ENABLE([ipv6],
-  [  --enable-ipv6    Build IPv6 capable fping6],
-  [case "${enableval}" in
-   yes)	ipv6=true ;;
-   no)	ipv6=false ;;
-   *)	AC_MSG_ERROR([bad value ${enableval} for --enable-ipv6]) ;;
-   esac],[ipv6=false])
-  AM_CONDITIONAL([IPV6], [test x$ipv6 = xtrue])
-
-if test x$ipv4 = xfalse && test x$ipv6 = xfalse; then
-  AC_MSG_ERROR([You must enable at least one of IPv4 and IPv6.])
-fi
+  AS_HELP_STRING([--disable-ipv6], [Disable support for pinging IPv6 hosts]))
+AS_IF([test "x$enable_ipv6" != "xno"], [
+    dnl Test if IPv6 is supported
+       AC_CHECK_HEADERS([netinet/icmp6.h], [have_ipv6="yes"], [], [[
+      #include <netinet/in.h>
+      #include <sys/types.h>
+  ]])
+])
+dnl Can't disable both IPv4 and IPv6
+AS_IF([test "x$enable_ipv4" = "xno" -a "x$enable_ipv6" = "xno"], [
+    AC_MSG_ERROR([Need to enable IPv4 or IPv6. Can't disable both!)])
+])
+dnl IPv6 required, but not supported?
+AS_IF([test \( "x$enable_ipv6" = "xyes" -o "x$enable_ipv4" = "xno" \) -a "x$have_ipv6" != "xyes" ], [
+    AC_MSG_ERROR([IPv6 not supported on this platform (netinet/icmp6.h header not found)])
+])
+AM_CONDITIONAL([IPV6], [test "x$have_ipv6" = "xyes"])
+AM_COND_IF([IPV6], [AC_DEFINE([IPV6], [1], [IPv6 enabled])])
 
 AC_ARG_ENABLE([timestamp],
-  AS_HELP_STRING([--disable-timestamp], [Disable kernel-based packet timestaping (SO_TIMESTAMP)]))
+  AS_HELP_STRING([--disable-timestamp], [Disable kernel-based packet timestaping (SO_TIMESTAMPNS)]))
 AS_IF([test "x$enable_timestamp" != "xno"], [
-   AC_CHECK_DECL([SO_TIMESTAMP], [AC_DEFINE(HAVE_SO_TIMESTAMP, [1], [set define])], [have_so_timestamp="no"], [#include <sys/types.h>
+   AC_CHECK_DECL([SO_TIMESTAMPNS], [AC_DEFINE(HAVE_SO_TIMESTAMPNS, [1], [SO_TIMESTAMPNS is defined])], [have_so_timestamp="no"], [#include <sys/types.h>
 #include <sys/socket.h>])
 ])
 dnl Test if --enable-timestamp is explicitely enabled and make an error if this platform doesn't support it
 AS_IF([test "x$enable_timestamp" = "xyes" -a "x$have_so_timestamp" = "xno"], [
   AC_MSG_ERROR([--enable-timestamp not supported on this platform])
 ])
+AS_IF([test "x$only_clock_realtime" = "xyes"], [AC_DEFINE(ONLY_CLOCK_REALTIME, [1], [ONLY_CLOCK_REALTIME is defined])])
+
+AC_ARG_ENABLE([safe-limits],
+  AS_HELP_STRING([--enable-safe-limits], [Restrict timing parameters (-i, -p) within "safe" limits]))
+AS_IF([test "x$enable_safe_limits" = "xyes"], [
+   AC_DEFINE(FPING_SAFE_LIMITS, [1], [safe limits should be enforced])])
+
+AC_ARG_ENABLE([debug],
+  AS_HELP_STRING([--enable-debug], [enable debugging @<:@default=no@:>@]), [enable_debug=$enableval], [enable_debug=no])
+AS_IF([test "x$enable_debug" = "xyes"], [
+  AC_DEFINE([DEBUG], [1], [Define if debugging is enabled])])
 
-AC_CANONICAL_TARGET
 AM_INIT_AUTOMAKE([-Wall -Werror foreign])
 AM_MAINTAINER_MODE
 
@@ -49,6 +81,7 @@ dnl Checks for programs.
 
 AC_PROG_CC
 AM_PROG_CC_C_O
+m4_version_prereq([2.70],,[AC_PROG_CC_STDC])
 AC_PROG_CPP
 AC_PROG_INSTALL
 
@@ -62,6 +95,13 @@ AC_CHECK_FUNC(connect)
 if test $ac_cv_func_connect = no; then
     AC_CHECK_LIB(socket, connect)
 fi
+AC_CHECK_FUNC(sigaction)
+if test $ac_cv_func_sigaction = yes; then
+    AC_DEFINE([USE_SIGACTION],[1],[Define if sigaction is available.])
+fi
+
+AC_CHECK_FUNCS([strftime], [],
+  [AC_MSG_ERROR([strftime function is required but not found])])
 
 AH_TOP([
 #ifndef CONFIG_H
@@ -80,7 +120,7 @@ AH_BOTTOM([
 ])
 
 dnl Checks for header files.
-AC_CHECK_HEADERS(unistd.h sys/file.h stdlib.h sys/select.h getopt.h)
+AC_CHECK_HEADERS([unistd.h sys/file.h stdlib.h sys/select.h])
 
 AC_CONFIG_FILES([Makefile
                  doc/Makefile

contrib/Dockerfile

@@ -0,0 +1,16 @@
+FROM ubuntu:20.04
+
+# Base
+RUN apt-get update && apt-get install -y \
+  build-essential \
+  automake \
+  m4
+
+# Add source code
+COPY ./ /app
+
+# Compile
+WORKDIR /app
+RUN autoreconf --install
+RUN ./configure && make && make install
+ENTRYPOINT ["fping"]

contrib/fping.spec

@@ -1,8 +1,8 @@
 Summary: send ICMP echo probes to multiple hosts
 Name: fping
-Version: 3.4
+Version: 4.2
 Release: 1
-License: BSD with advertising
+License: Freely redistributable without restriction
 Group: Applications/System
 Source0: http://fping.org/dist/%{name}-%{version}.tar.gz
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-buildroot
@@ -47,14 +47,15 @@ rm -rf $RPM_BUILD_ROOT
 %defattr(-,root,root,-)
 %attr(4755, root, root) /usr/sbin/fping
 %attr(4755, root, root) /usr/sbin/fping6
-%doc README COPYING ChangeLog
+%doc README.md COPYING CHANGELOG.md
 /usr/share/man/man8/fping.8.gz
 /usr/share/man/man8/fping6.8.gz
 
 %post
 if [ -x /usr/sbin/setcap ]; then
     /bin/chmod 0755 /usr/sbin/fping*
-    /usr/sbin/setcap cap_net_raw+ep /usr/sbin/fping*
+    /usr/sbin/setcap cap_net_raw,cap_net_admin+ep /usr/sbin/fping
+    /usr/sbin/setcap cap_net_raw,cap_net_admin+ep /usr/sbin/fping6
 fi
 
 %changelog

doc/CHANGELOG.pre-v4

@@ -1,7 +1,3 @@
-Unreleased (version 3 branch)
-  * Fix portability issue with GNU Hurd
-  * Fix C89 portability issue
-
 2017-02-09  David Schweikert  <david@schweikert.ch>
   * Version 3.16
   * (feature) Support kernel-timestamping of received packets (#46)

doc/Makefile.am

@@ -1,17 +1,6 @@
-man_MANS =
+man_MANS = fping.8
 
-if IPV4
-man_MANS += fping.8
-endif
-
-if IPV6
-man_MANS += fping6.8
-endif
-
-EXTRA_DIST = fping.8 fping6.8 fping.pod README.1992
+EXTRA_DIST = fping.8 fping.pod README.1992 CHANGELOG.pre-v4
 
 fping.8: fping.pod
 	pod2man  -c "" -s 8 -r "fping" $< >$@
-
-fping6.8: fping.pod
-	pod2man  -c "" -s 8 -r "fping" -n fping6 $< >$@

doc/fping.pod

@@ -5,7 +5,6 @@ fping - send ICMP ECHO_REQUEST packets to network hosts
 =head1 SYNOPSIS
 
 B<fping> [ I<options> ] [ I<systems...> ]
-B<fping6> [ I<options> ] [ I<systems...> ] 
 
 =head1 DESCRIPTION
 
@@ -20,25 +19,31 @@ of targets to check; if a target does not respond within a certain time limit
 and/or retry limit it is designated as unreachable. B<fping> also supports
 sending a specified number of pings to a target, or looping indefinitely (as in
 B<ping> ). Unlike B<ping>, B<fping> is meant to be used in scripts, so its
-output is designed to be easy to parse.
-
-The binary named B<fping6> is the same as B<fping>, except that it uses IPv6
-addresses instead of IPv4.
+output is designed to be easy to parse.  Current statistics can be obtained without
+termination of process with signal SIGQUIT (^\ from the keyboard on most systems).
 
 =head1 OPTIONS
 
 =over 5
 
-=item B<-a>
+=item B<-4>, B<--ipv4>
+
+Restrict name resolution and IPs to IPv4 addresses.
+
+=item B<-6>, B<--ipv6>
+
+Restrict name resolution and IPs to IPv6 addresses.
+
+=item B<-a>, B<--alive>
 
 Show systems that are alive.
 
-=item B<-A>
+=item B<-A>, B<--addr>
 
 Display targets by address rather than DNS name. Combined with -d, the output
 will be both the ip and (if available) the hostname.
 
-=item B<-b> I<n>
+=item B<-b>, B<--size>=I<BYTES>
 
 Number of bytes of ping data to send.  The minimum size (normally 12) allows
 room for the data that B<fping> needs to do its work (sequence number,
@@ -48,7 +53,7 @@ Default is 56, as in B<ping>. Maximum is the theoretical maximum IP datagram
 size (64K), though most systems limit this to a smaller, system-dependent
 number.
 
-=item B<-B> I<n>
+=item B<-B>, B<--backoff>=I<N>
 
 Backoff factor. In the default mode, B<fping> sends several requests to a
 target before giving up, waiting longer for a reply on each successive request.
@@ -56,46 +61,57 @@ This parameter is the value by which the wait time (B<-t>) is multiplied on each
 successive request; it must be entered as a floating-point number (x.y). The
 default is 1.5.
 
-=item B<-c> I<n>
+=item B<-c>, B<--count>=I<N>
 
 Number of request packets to send to each target.  In this mode, a line is
 displayed for each received response (this can suppressed with B<-q> or B<-Q>).
 Also, statistics about responses for each target are displayed when all
-requests have been sent (or when interrupted). 
+requests have been sent (or when interrupted).  This option overrides B<-a>
+or B<-u>.
 
-=item B<-C> I<n>
+=item B<-C>, B<--vcount>=I<N>
 
 Similar to B<-c>, but the per-target statistics are displayed in a format
 designed for automated response-time statistics gathering. For example:
 
- % fping -C 5 -q somehost 
+ $ fping -C 5 -q somehost
  somehost : 91.7 37.0 29.2 - 36.8
 
 shows the response time in milliseconds for each of the five requests, with the
-C<-> indicating that no response was received to the fourth request. 
+C<-> indicating that no response was received to the fourth request.  This
+option overrides B<-a> or B<-u>.
 
-=item B<-d>
+=item B<-d>, B<--rdns>
 
-Use DNS to lookup address of return ping packet. This allows you to give fping
-a list of IP addresses as input and print hostnames in the output. 
+Use DNS to lookup address of ping target. This allows you to give fping
+a list of IP addresses as input and print hostnames in the output. This is similar
+to option B<-n>/B<--name>, but will force a reverse-DNS lookup even if you give
+hostnames as target (NAME->IP->NAME).
 
-=item B<-D>
+=item B<-D>, B<--timestamp>
 
 Add Unix timestamps in front of output lines generated with in looping or counting
 modes (B<-l>, B<-c>, or B<-C>).
 
-=item B<-e>
+Subcommand: B<--timestamp-format>=I<ctime|iso|rfc3339>
 
-Show elapsed (round-trip) time of packets. 
+Allow to change the timestamp format of the B<-D> option to the following format types.
 
-=item B<-f>
+I<ctime> = "%c" (Example: Mon Jun 10 07:50:00 2024)
 
-Read list of targets from a file.  This option can only be used by the root
-user. Regular users should pipe in the file via stdin: 
+I<iso> = "%Y-%m-%dT%T%z" (Example: 2024-06-10T07:50:00+0200)
 
- % fping < targets_file 
+I<rfc3339> = "%Y-%m-%d %H:%M:%S" (Example: 2024-06-10 07:50:00)
 
-=item B<-g> I<addr/mask>
+=item B<-e>, B<--elapsed>
+
+Show elapsed (round-trip) time of packets.
+
+=item B<-f>, B<--file>
+
+Read list of targets from a file.
+
+=item B<-g>, B<--generate> I<addr/mask>
 
 Generate a target list from a supplied IP netmask, or a starting and ending IP.
 Specify the netmask or start/end in the targets portion of the command line. If
@@ -103,123 +119,147 @@ a network with netmask is given, the network and broadcast addresses will be
 excluded. ex. To ping the network 192.168.1.0/24, the specified command line
 could look like either:
 
- fping -g 192.168.1.0/24 
+ $ fping -g 192.168.1.0/24
 
 or
 
- fping -g 192.168.1.1 192.168.1.254 
+ $ fping -g 192.168.1.1 192.168.1.254
 
-=item B<-h>
+=item B<-h>, B<--help>
 
 Print usage message.
 
-=item B<-i> I<n>
+=item B<-H>, B<--ttl>=I<N>
+
+Set the IP TTL field (time to live hops).
+
+=item B<-i>, B<--interval>=I<MSEC>
 
 The minimum amount of time (in milliseconds) between sending a ping packet
-to any target (default is 25, minimum is 1).
+to any target (default is 10, minimum is 1).
+
+=item B<-I>, B<--iface>=I<IFACE>
+
+Set the interface (requires SO_BINDTODEVICE support).
+
+=item B<-k>, B<--fwmark>=I<FWMARK>
+
+Set FWMARK on ping packets for policy-based routing. Requires Linux kernel
+2.6.25<=, and root privileges or cap_net_admin.
 
-=item B<-l>
+=item B<-l>, B<--loop>
 
 Loop sending packets to each target indefinitely. Can be interrupted with
 Ctrl-C; statistics about responses for each target are then displayed.
 
-=item B<-m>
+=item B<-m>, B<--all>
 
 Send pings to each of a target host's multiple IP addresses (use of option '-A'
 is recommended).
 
-=item B<-M>
+=item B<-M>, B<--dontfrag>
 
 Set the "Don't Fragment" bit in the IP header (used to determine/test the MTU).
 
-=item B<-n>
+=item B<-n>, B<--name>
 
-Same as -d. 
+If targets are specified as IP addresses, do a reverse-DNS lookup on them
+to print hostnames in the output.
 
-=item B<-N>
+=item B<-N>, B<--netdata>
 
-Format output for netdata (-l -Q are required). See: L<http://my-netdata.io/>
+Format output for netdata (-l -Q are required). See: L<https://netdata.cloud/>
 
-=item B<-o>
+=item B<-o>, B<--outage>
 
 Calculate "outage time" based on the number of lost pings and the interval used (useful for network convergence tests).
 
-=item B<-O> I<n>
+=item B<-O>, B<--tos>=I<N>
 
-Set the typ of service flag (TOS). I<n> can be either decimal or hexadecimal
+Set the typ of service flag (TOS). I<N> can be either decimal or hexadecimal
 (0xh) format.
 
-=item B<-p> <n>
+=item B<-p>, B<--period>=I<MSEC>
 
 In looping or counting modes (B<-l>, B<-c>, or B<-C>), this parameter sets
 the time in milliseconds that B<fping> waits between successive packets to
 an individual target. Default is 1000 and minimum is 10.
 
-=item B<-q>
+=item B<-q>, B<--quiet>
 
 Quiet. Don't show per-probe results, but only the final summary. Also don't
 show ICMP error messages.
 
-=item B<-Q> I<n>
+=item B<-Q>, B<--squiet>=I<SECS[,cumulative]>
 
-Like B<-q>, but show summary results every n seconds.
+Like B<-q>, but additionally show interval summary results every I<SECS>
+seconds. With I<cumulative>, show summary results since start instead of
+for the last interval, unless option B<-N> is used, too.
 
-=item B<-r> I<n>
+=item B<-r>, B<--retry>=I<N>
 
 Retry limit (default 3). This is the number of times an attempt at pinging
 a target will be made, not including the first try.
 
-=item B<-R>
+=item B<-R>, B<--random>
 
 Instead of using all-zeros as the packet data, generate random bytes.
 Use to defeat, e.g., link data compression.
 
-=item B<-s>
+=item B<-s>, B<--stats>
 
 Print cumulative statistics upon exit.
 
-=item B<-S> I<addr>
+=item B<-S>, B<--src>=I<addr>
 
 Set source address.
 
-=item B<-I> I<if>
+=item B<-t>, B<--timeout>=I<MSEC>
 
-Set the interface (requires SO_BINDTODEVICE support) 
+Initial target timeout in milliseconds. In the default, non-loop mode, the
+default timeout is 500ms, and it represents the amount of time that B<fping>
+waits for a response to its first request. Successive timeouts are multiplied
+by the backoff factor specified with B<-B>.
 
-=item B<-t> I<n>
+In loop/count mode, the default timeout is automatically adjusted to match
+the "period" value (but not more than 2000ms). You can still adjust the timeout
+value with this option, if you wish to, but note that setting a value larger
+than "period" produces inconsistent results, because the timeout value can
+be respected only for the last ping.
 
-Initial target timeout in milliseconds (default 500). In the default mode, this
-is the amount of time that B<fping> waits for a response to its first request.
-Successive timeouts are multiplied by the backoff factor specified with B<-B>.
-Note that this option has no effect looping or counting modes (B<-l>, B<-c>, or
-B<-C>).
+Also note that any received replies that are larger than the timeout value, will
+be discarded.
 
 =item B<-T> I<n>
 
 Ignored (for compatibility with fping 2.4).
 
-=item B<-u>
+=item B<-u>, B<--unreach>
 
 Show targets that are unreachable.
 
-=item B<-v>
+=item B<-v>, B<--version>
 
 Print B<fping> version information.
 
-=item B<-H> I<n>
+=item B<-x>, B<--reachable>=I<N>
 
-Set the IP TTL field (time to live hops). 
+Given a list of hosts, this mode checks if number of reachable hosts is >= N
+and exits true in that case.
+
+=item B<-X>, B<--fast-reachable>=I<N>
+
+Given a list of hosts, this mode immediately exits true once N alive hosts
+have been found.
 
 =back
 
 =head1 EXAMPLES
 
-Generate ~1000 pings per second to a host until canceled, printing statistics
-on the fly at one second intervals, and printing statistics at the end:
+Generate 20 pings to two hosts in ca. 1 second (i.e. one ping every 50 ms to
+each host), and report every ping RTT at the end:
 
-# fping -s -l -i 1 -p 1 -T 1 -Q 1 127.0.0.1
-
-Note that ping intervals less than 1ms can only be used as root.
+ $ fping --quiet --interval=1 --vcount=20 --period=50 127.0.0.1 127.0.0.2
 
 =head1 AUTHORS
 
@@ -247,14 +287,19 @@ B<fping website: L<http://www.fping.org>>
 
 =head1 DIAGNOSTICS
 
-Exit status is 0 if all the hosts are reachable, 1 if some hosts
+Exit status is 0 if all the hosts (or the number of hosts specified with B<-x>
+or B<-X>) are reachable, 1 if some (or too many with B<-x> or B<-X>) hosts
 were unreachable, 2 if any IP addresses were not found, 3 for invalid command
 line arguments, and 4 for a system call failure.
 
 =head1 RESTRICTIONS
 
-In order to avoid users mistakingly flooding the network, the following values
-are not allowed for non-root users:
+The number of addresses that can be generated using the C<-g>, C<--generate>
+option is limited to 131070 (the number of host addresses in one 15-bit IPv4
+prefix).
+
+If fping was configured with C<--enable-safe-limits>, the following values are
+not allowed for non-root users:
 
 =over 4
 

src/.clang-format

@@ -1,2 +1,3 @@
 BasedOnStyle: WebKit
 BreakBeforeBraces: Stroustrup
+PointerAlignment: Right

src/Makefile.am

@@ -1,18 +1,11 @@
 AM_CFLAGS = -Wall -Wextra -Wno-sign-compare
 
-prog =
+sbin_PROGRAMS = fping
+
+fping_SOURCES = fping.c seqmap.c socket4.c fping.h options.h seqmap.h optparse.c optparse.h
+fping_DEPENDENCIES = ../config.h
 
-if IPV4
-prog += fping
-endif
 if IPV6
-prog += fping6
+fping_SOURCES += socket6.c
+fping_CFLAGS = $(AM_CFLAGS) -DIPV6
 endif
-
-sbin_PROGRAMS = ${prog}
-
-fping_SOURCES = fping.c seqmap.c socket.c socket4.c fping.h options.h seqmap.h
-fping_DEPENDENCIES = ../config.h
-fping6_SOURCES = fping.c seqmap.c socket.c socket6.c fping.h options.h seqmap.h
-fping6_DEPENDENCIES = ../config.h
-fping6_CFLAGS = $(AM_CFLAGS) -DIPV6

src/fping.h

@@ -7,24 +7,33 @@
 #include <sys/types.h>
 #include <netinet/in.h>
 
-#ifndef IPV6
-#define FPING_INADDR   struct in_addr
-#define FPING_ICMPHDR  struct icmp
+/* this requires variadic macros, part of C99 */
+#if (defined(DEBUG) || defined(_DEBUG))
+extern int64_t current_time_ns;
+extern int trace_flag;
+#define dbg_printf(fmt, ...) do { if (trace_flag) { fprintf(stderr, "[%10.5f] ", (double)(current_time_ns / 1000)/1000000); fprintf(stderr, fmt, __VA_ARGS__); } } while (0)
+            
 #else
-#define FPING_INADDR   struct in6_addr
-#define FPING_ICMPHDR  struct icmp6_hdr
+#define dbg_printf(fmt, ...)
 #endif
 
+
 /* fping.c */
 void crash_and_burn( char *message );
 void errno_crash_and_burn( char *message );
 int in_cksum( unsigned short *p, int n );
-int random_data_flag;
+extern int nonzero_payload_flag;
 
 /* socket.c */
-int  open_ping_socket();
-void init_ping_buffer(size_t ping_data_size);
-void socket_set_src_addr(int s, FPING_INADDR src_addr);
-int  socket_sendto_ping(int s, struct sockaddr *saddr, socklen_t saddr_len, uint16_t icmp_seq, uint16_t icmp_id);
+int  open_ping_socket_ipv4(int *socktype);
+void init_ping_buffer_ipv4(size_t ping_data_size);
+void socket_set_src_addr_ipv4(int s, struct in_addr *src_addr, int *ident);
+int  socket_sendto_ping_ipv4(int s, struct sockaddr *saddr, socklen_t saddr_len, uint16_t icmp_seq, uint16_t icmp_id);
+#ifdef IPV6
+int  open_ping_socket_ipv6(int *socktype);
+void init_ping_buffer_ipv6(size_t ping_data_size);
+void socket_set_src_addr_ipv6(int s, struct in6_addr *src_addr, int *ident);
+int  socket_sendto_ping_ipv6(int s, struct sockaddr *saddr, socklen_t saddr_len, uint16_t icmp_seq, uint16_t icmp_id);
+#endif
 
 #endif

src/maketags.sh

@@ -0,0 +1 @@
+ctags -R --fields=+S /usr/include ..

src/options.h

@@ -20,7 +20,7 @@
 /* constants */
 
 #ifndef DEFAULT_INTERVAL
-#define DEFAULT_INTERVAL 25        /* default time between packets (msec) */
+#define DEFAULT_INTERVAL 10        /* default time between packets (msec) */
 #endif
 
 #ifndef DEFAULT_PERHOST_INTERVAL      /* default time between packets */
@@ -29,6 +29,7 @@
 
 #ifndef DEFAULT_TIMEOUT
 #define DEFAULT_TIMEOUT 500       /* individual host timeouts */
+#define AUTOTUNE_TIMEOUT_MAX  2000
 #endif
 
 

src/optparse.c

@@ -0,0 +1,266 @@
+#include "optparse.h"
+
+#define MSG_INVALID "invalid option"
+#define MSG_MISSING "option requires an argument"
+#define MSG_TOOMANY "option takes no arguments"
+
+static int
+opterror(struct optparse *options, const char *message, const char *data)
+{
+    unsigned p = 0;
+    while (*message)
+        options->errmsg[p++] = *message++;
+    const char *sep = " -- '";
+    while (*sep)
+        options->errmsg[p++] = *sep++;
+    while (p < sizeof(options->errmsg) - 2 && *data)
+        options->errmsg[p++] = *data++;
+    options->errmsg[p++] = '\'';
+    options->errmsg[p++] = '\0';
+    return '?';
+}
+
+void optparse_init(struct optparse *options, char **argv)
+{
+    options->argv = argv;
+    options->permute = 1;
+    options->optind = 1;
+    options->subopt = 0;
+    options->optarg = 0;
+    options->errmsg[0] = '\0';
+}
+
+static inline int
+is_dashdash(const char *arg)
+{
+    return arg != 0 && arg[0] == '-' && arg[1] == '-' && arg[2] == '\0';
+}
+
+static inline int
+is_shortopt(const char *arg)
+{
+    return arg != 0 && arg[0] == '-' && arg[1] != '-' && arg[1] != '\0';
+}
+
+static inline int
+is_longopt(const char *arg)
+{
+    return arg != 0 && arg[0] == '-' && arg[1] == '-' && arg[2] != '\0';
+}
+
+static void
+permute(struct optparse *options, int index)
+{
+    char *nonoption = options->argv[index];
+    for (int i = index; i < options->optind - 1; i++)
+        options->argv[i] = options->argv[i + 1];
+    options->argv[options->optind - 1] = nonoption;
+}
+
+static int
+argtype(const char *optstring, char c)
+{
+    if (c == ':')
+        return -1;
+    for (; *optstring && c != *optstring; optstring++);
+    if (!*optstring)
+        return -1;
+    int count = OPTPARSE_NONE;
+    if (optstring[1] == ':')
+        count += optstring[2] == ':' ? 2 : 1;
+    return count;
+}
+
+int optparse(struct optparse *options, const char *optstring)
+{
+    options->errmsg[0] = '\0';
+    options->optopt = 0;
+    options->optarg = 0;
+    char *option = options->argv[options->optind];
+    if (option == 0) {
+        return -1;
+    } else if (is_dashdash(option)) {
+        options->optind++; /* consume "--" */
+        return -1;
+    } else if (!is_shortopt(option)) {
+        if (options->permute) {
+            int index = options->optind;
+            options->optind++;
+            int r = optparse(options, optstring);
+            permute(options, index);
+            options->optind--;
+            return r;
+        } else {
+            return -1;
+        }
+    }
+    option += options->subopt + 1;
+    options->optopt = option[0];
+    int type = argtype(optstring, option[0]);
+    char *next = options->argv[options->optind + 1];
+    switch (type) {
+    case -1: {
+        options->optind++;
+        char str[2] = {option[0]};
+        return opterror(options, MSG_INVALID, str);
+    }
+    case OPTPARSE_NONE:
+        if (option[1]) {
+            options->subopt++;
+        } else {
+            options->subopt = 0;
+            options->optind++;
+        }
+        return option[0];
+    case OPTPARSE_REQUIRED:
+        options->subopt = 0;
+        options->optind++;
+        if (option[1]) {
+            options->optarg = option + 1;
+        } else if (next != 0) {
+            options->optarg = next;
+            options->optind++;
+        } else {
+            options->optarg = 0;
+            char str[2] = {option[0]};
+            return opterror(options, MSG_MISSING, str);
+        }
+        return option[0];
+    case OPTPARSE_OPTIONAL:
+        options->subopt = 0;
+        options->optind++;
+        if (option[1])
+            options->optarg = option + 1;
+        else
+            options->optarg = 0;
+        return option[0];
+    }
+    return 0;
+}
+
+char *optparse_arg(struct optparse *options)
+{
+    options->subopt = 0;
+    char *option = options->argv[options->optind];
+    if (option != 0)
+        options->optind++;
+    return option;
+}
+
+static inline int
+longopts_end(const struct optparse_long *longopts, int i)
+{
+    return !longopts[i].longname && !longopts[i].shortname;
+}
+
+static void
+optstring_from_long(const struct optparse_long *longopts, char *optstring)
+{
+    char *p = optstring;
+    for (int i = 0; !longopts_end(longopts, i); i++) {
+        if (longopts[i].shortname) {
+            *p++ = longopts[i].shortname;
+            for (int a = 0; a < (int)longopts[i].argtype; a++)
+                *p++ = ':';
+        }
+    }
+    *p = '\0';
+}
+
+/* Unlike strcmp(), handles options containing "=". */
+static int
+longopts_match(const char *longname, const char *option)
+{
+    if (longname == 0)
+        return 0;
+    const char *a = option, *n = longname;
+    for (; *a && *n && *a != '='; a++, n++)
+        if (*a != *n)
+            return 0;
+    return *n == '\0' && (*a == '\0' || *a == '=');
+}
+
+/* Return the part after "=", or NULL. */
+static char *
+longopts_arg(char *option)
+{
+    for (; *option && *option != '='; option++);
+    if (*option == '=')
+        return option + 1;
+    else
+        return 0;
+}
+
+static int
+long_fallback(struct optparse *options,
+              const struct optparse_long *longopts,
+              int *longindex)
+{
+    char optstring[96 * 3 + 1]; /* 96 ASCII printable characters */
+    optstring_from_long(longopts, optstring);
+    int result = optparse(options, optstring);
+    if (longindex != 0) {
+        *longindex = -1;
+        if (result != -1)
+            for (int i = 0; !longopts_end(longopts, i); i++)
+                if (longopts[i].shortname == options->optopt)
+                    *longindex = i;
+    }
+    return result;
+}
+
+int
+optparse_long(struct optparse *options,
+              const struct optparse_long *longopts,
+              int *longindex)
+{
+    char *option = options->argv[options->optind];
+    if (option == 0) {
+        return -1;
+    } else if (is_dashdash(option)) {
+        options->optind++; /* consume "--" */
+        return -1;
+    } else if (is_shortopt(option)) {
+        return long_fallback(options, longopts, longindex);
+    } else if (!is_longopt(option)) {
+        if (options->permute) {
+            int index = options->optind;
+            options->optind++;
+            int r = optparse_long(options, longopts, longindex);
+            permute(options, index);
+            options->optind--;
+            return r;
+        } else {
+            return -1;
+        }
+    }
+
+    /* Parse as long option. */
+    options->errmsg[0] = '\0';
+    options->optopt = 0;
+    options->optlongname = 0;
+    options->optarg = 0;
+    option += 2; /* skip "--" */
+    options->optind++;
+    for (int i = 0; !longopts_end(longopts, i); i++) {
+        const char *name = longopts[i].longname;
+        if (longopts_match(name, option)) {
+            options->optlongname = option;
+            if (longindex)
+                *longindex = i;
+            options->optopt = longopts[i].shortname;
+            char *arg = longopts_arg(option);
+            if (longopts[i].argtype == OPTPARSE_NONE && arg != 0) {
+                return opterror(options, MSG_TOOMANY, name);
+            } if (arg != 0) {
+                options->optarg = arg;
+            } else if (longopts[i].argtype == OPTPARSE_REQUIRED) {
+                options->optarg = options->argv[options->optind++];
+                if (options->optarg == 0)
+                    return opterror(options, MSG_MISSING, name);
+            }
+            return options->optopt;
+        }
+    }
+    return opterror(options, MSG_INVALID, option);
+}

src/optparse.h

@@ -0,0 +1,103 @@
+#ifndef OPTPARSE_H
+#define OPTPARSE_H
+
+/**
+ * Optparse -- portable, reentrant, embeddable, getopt-like option parser
+ *
+ * The POSIX getopt() option parser has three fatal flaws. These flaws
+ * are solved by Optparse.
+ *
+ * 1) Parser state is stored entirely in global variables, some of
+ * which are static and inaccessible. This means only one thread can
+ * use getopt(). It also means it's not possible to recursively parse
+ * nested sub-arguments while in the middle of argument parsing.
+ * Optparse fixes this by storing all state on a local struct.
+ *
+ * 2) The POSIX standard provides no way to properly reset the parser.
+ * This means for portable code that getopt() is only good for one
+ * run, over one argv with one optstring. It also means subcommand
+ * options cannot be processed with getopt(). Most implementations
+ * provide a method to reset the parser, but it's not portable.
+ * Optparse provides an optparse_arg() function for stepping over
+ * subcommands and continuing parsing of options with another
+ * optstring. The Optparse struct itself can be passed around to
+ * subcommand handlers for additional subcommand option parsing. A
+ * full reset can be achieved by with an additional optparse_init().
+ *
+ * 3) Error messages are printed to stderr. This can be disabled with
+ * opterr, but the messages themselves are still inaccessible.
+ * Optparse solves this by writing an error message in its errmsg
+ * field. The downside to Optparse is that this error message will
+ * always be in English rather than the current locale.
+ *
+ * Optparse should be familiar with anyone accustomed to getopt(), and
+ * it could be a nearly drop-in replacement. The optstring is the same
+ * and the fields have the same names as the getopt() global variables
+ * (optarg, optind, optopt).
+ *
+ * Optparse also supports GNU-style long options with optparse_long().
+ * The interface is slightly different and simpler than getopt_long().
+ *
+ * By default, argv is permuted as it is parsed, moving non-option
+ * arguments to the end. This can be disabled by setting the `permute`
+ * field to 0 after initialization.
+ */
+
+struct optparse {
+    char **argv;
+    int permute;
+    int optind;
+    int optopt;
+    char *optlongname;
+    char *optarg;
+    char errmsg[64];
+    int subopt;
+};
+
+enum optparse_argtype { OPTPARSE_NONE, OPTPARSE_REQUIRED, OPTPARSE_OPTIONAL };
+
+struct optparse_long {
+    const char *longname;
+    int shortname;
+    enum optparse_argtype argtype;
+};
+
+/**
+ * Initializes the parser state.
+ */
+void optparse_init(struct optparse *options, char **argv);
+
+/**
+ * Read the next option in the argv array.
+ * @param optstring a getopt()-formatted option string.
+ * @return the next option character, -1 for done, or '?' for error
+ *
+ * Just like getopt(), a character followed by no colons means no
+ * argument. One colon means the option has a required argument. Two
+ * colons means the option takes an optional argument.
+ */
+int optparse(struct optparse *options, const char *optstring);
+
+/**
+ * Handles GNU-style long options in addition to getopt() options.
+ * This works a lot like GNU's getopt_long(). The last option in
+ * longopts must be all zeros, marking the end of the array. The
+ * longindex argument may be NULL.
+ */
+int
+optparse_long(struct optparse *options,
+              const struct optparse_long *longopts,
+              int *longindex);
+
+/**
+ * Used for stepping over non-option arguments.
+ * @return the next non-option argument, or NULL for no more arguments
+ *
+ * Argument parsing can continue with optparse() after using this
+ * function. That would be used to parse the options for the
+ * subcommand returned by optparse_arg(). This function allows you to
+ * ignore the value of optind.
+ */
+char *optparse_arg(struct optparse *options);
+
+#endif

src/seqmap.c

@@ -35,17 +35,20 @@
  *           https://github.com/schweikert/fping/issues/48
  */
 
+#include "config.h"
 #include "seqmap.h"
 #include "limits.h"
 #include "options.h"
+#include "fping.h"
 
+#include <inttypes.h>
 #include <stdio.h>
 #include <stdlib.h>
 
 /* description of the data structure used:
  *
  * - we assume that no more than SEQMAP_MAXSEQ (65535) pings are sent in
- *   the timeout interval (SEQMAP_TIMEOUT_IN_S)
+ *   the timeout interval (SEQMAP_TIMEOUT_IN_NS)
  * - we store the values in an array with SEQMAP_MAXSEQ elements
  * - current sequence number % SEQMAP_MAXSEQ gives the current index
  * - when entering a value, we check that the current entry is expired
@@ -54,7 +57,7 @@
 static SEQMAP_VALUE* seqmap_map = NULL;
 static unsigned int seqmap_next_id = 0;
 
-#define SEQMAP_TIMEOUT_IN_S 10
+#define SEQMAP_TIMEOUT_IN_NS 10000000000
 #define SEQMAP_UNASSIGNED_HOST_NR UINT_MAX
 
 void seqmap_init()
@@ -65,7 +68,7 @@ void seqmap_init()
     }
 }
 
-unsigned int seqmap_add(unsigned int host_nr, unsigned int ping_count, struct timeval* now)
+unsigned int seqmap_add(unsigned int host_nr, unsigned int ping_count, int64_t timestamp)
 {
     unsigned int current_id;
     SEQMAP_VALUE* next_value;
@@ -78,26 +81,27 @@ unsigned int seqmap_add(unsigned int host_nr, unsigned int ping_count, struct ti
     /* check if expired (note that unused seqmap values will have fields set to
      * 0, so will be seen as expired */
     next_value = &seqmap_map[seqmap_next_id];
-    if (next_value->ping_ts.tv_sec != 0 && (now->tv_sec - next_value->ping_ts.tv_sec) < SEQMAP_TIMEOUT_IN_S) {
-        fprintf(stderr, "fping error: not enough sequence numbers available! (expire_timeout=%d, host_nr=%d, ping_count=%d, seqmap_next_id=%d)\n",
-            SEQMAP_TIMEOUT_IN_S, host_nr, ping_count, seqmap_next_id);
+    if (next_value->ping_ts != 0 && timestamp - next_value->ping_ts < SEQMAP_TIMEOUT_IN_NS) {
+        fprintf(stderr, "fping error: not enough sequence numbers available! (expire_timeout=%" PRId64 ", host_nr=%d, ping_count=%d, seqmap_next_id=%d)\n",
+            SEQMAP_TIMEOUT_IN_NS, host_nr, ping_count, seqmap_next_id);
         exit(4);
     }
 
     /* store the value */
     next_value->host_nr = host_nr;
     next_value->ping_count = ping_count;
-    next_value->ping_ts.tv_sec = now->tv_sec;
-    next_value->ping_ts.tv_usec = now->tv_usec;
+    next_value->ping_ts = timestamp;
 
     /* increase next id */
     current_id = seqmap_next_id;
     seqmap_next_id = (seqmap_next_id + 1) % SEQMAP_MAXSEQ;
 
+    dbg_printf("seqmap_add(host: %d, index: %d) -> %d\n", host_nr, ping_count, current_id);
+
     return current_id;
 }
 
-SEQMAP_VALUE* seqmap_fetch(unsigned int id, struct timeval* now)
+SEQMAP_VALUE* seqmap_fetch(unsigned int id, int64_t now)
 {
     SEQMAP_VALUE* value;
 
@@ -108,9 +112,13 @@ SEQMAP_VALUE* seqmap_fetch(unsigned int id, struct timeval* now)
     value = &seqmap_map[id];
 
     /* verify that value is not expired */
-    if (now->tv_sec - value->ping_ts.tv_sec >= SEQMAP_TIMEOUT_IN_S) {
+    if (now - value->ping_ts >= SEQMAP_TIMEOUT_IN_NS) {
+        dbg_printf("seqmap_fetch(%d) -> host: %d, index: %d -> DISCARDED %ld\n", id, value->host_nr, value->ping_count,
+                now - value->ping_ts);
         return NULL;
     }
 
+    dbg_printf("seqmap_fetch(%d) -> host: %d, index: %d\n", id, value->host_nr, value->ping_count);
+
     return value;
 }

src/seqmap.h

@@ -2,19 +2,20 @@
 #define SEQMAP_H
 
 #include <sys/time.h>
+#include <stdint.h>
 
 typedef struct seqmap_value
 {
     unsigned int    host_nr;
     unsigned int    ping_count;
-    struct timeval  ping_ts;
+    int64_t         ping_ts;
 
 } SEQMAP_VALUE;
 
 #define SEQMAP_MAXSEQ 65535
 
 void seqmap_init();
-unsigned int seqmap_add(unsigned int host_nr, unsigned int ping_count, struct timeval *now);
-SEQMAP_VALUE *seqmap_fetch(unsigned int id, struct timeval *now);
+unsigned int seqmap_add(unsigned int host_nr, unsigned int ping_count, int64_t now);
+SEQMAP_VALUE *seqmap_fetch(unsigned int id, int64_t now);
 
 #endif

src/socket.c

@@ -1,79 +0,0 @@
-/* 
- * fping: fast-ping, file-ping, favorite-ping, funky-ping
- *
- *   Ping a list of target hosts in a round robin fashion.
- *   A better ping overall.
- *
- * fping website:  http://www.fping.org
- *
- * Current maintainer of fping: David Schweikert
- * Please send suggestions and patches to: david@schweikert.ch
- *
- *
- * Original author:  Roland Schemers  <schemers@stanford.edu>
- * IPv6 Support:     Jeroen Massar    <jeroen@unfix.org / jeroen@ipng.nl>
- * Improved main loop: David Schweikert <david@schweikert.ch>
- * Debian Merge, TOS settings: Tobi Oetiker <tobi@oetiker.ch>
- * Bugfixes, byte order & senseful seq.-numbers: Stephan Fuhrmann (stephan.fuhrmann AT 1und1.de)
- *
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by Stanford University.  The name of the University may not be used 
- * to endorse or promote products derived from this software without 
- * specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
-#include "config.h"
-#include "fping.h"
-
-int open_ping_socket_ipv4();
-int open_ping_socket_ipv6();
-void init_ping_buffer_ipv4(size_t ping_data_size);
-void init_ping_buffer_ipv6(size_t ping_data_size);
-void socket_set_src_addr_ipv4(int s, FPING_INADDR src_addr);
-void socket_set_src_addr_ipv6(int s, FPING_INADDR src_addr);
-int socket_sendto_ping_ipv4(int s, struct sockaddr* saddr, socklen_t saddr_len, uint16_t icmp_seq_nr, uint16_t icmp_id_nr);
-int socket_sendto_ping_ipv6(int s, struct sockaddr* saddr, socklen_t saddr_len, uint16_t icmp_seq_nr, uint16_t icmp_id_nr);
-
-int open_ping_socket()
-{
-#ifndef IPV6
-    return open_ping_socket_ipv4();
-#else
-    return open_ping_socket_ipv6();
-#endif
-}
-
-void init_ping_buffer(size_t ping_data_size)
-{
-#ifndef IPV6
-    return init_ping_buffer_ipv4(ping_data_size);
-#else
-    return init_ping_buffer_ipv6(ping_data_size);
-#endif
-}
-
-void socket_set_src_addr(int s, FPING_INADDR src_addr)
-{
-#ifndef IPV6
-    socket_set_src_addr_ipv4(s, src_addr);
-#else
-    socket_set_src_addr_ipv6(s, src_addr);
-#endif
-}
-
-int socket_sendto_ping(int s, struct sockaddr* saddr, socklen_t saddr_len, uint16_t icmp_seq_nr, uint16_t icmp_id_nr)
-{
-#ifndef IPV6
-    return socket_sendto_ping_ipv4(s, saddr, saddr_len, icmp_seq_nr, icmp_id_nr);
-#else
-    return socket_sendto_ping_ipv6(s, saddr, saddr_len, icmp_seq_nr, icmp_id_nr);
-#endif
-}

src/socket4.c

@@ -44,10 +44,10 @@
 #include <string.h>
 #include <sys/socket.h>
 
-char* ping_buffer = 0;
-size_t ping_pkt_size;
+char* ping_buffer_ipv4 = 0;
+size_t ping_pkt_size_ipv4;
 
-int open_ping_socket_ipv4()
+int open_ping_socket_ipv4(int *socktype)
 {
     struct protoent* proto;
     int s;
@@ -57,12 +57,14 @@ int open_ping_socket_ipv4()
         crash_and_burn("icmp: unknown protocol");
 
     /* create raw socket for ICMP calls (ping) */
-    s = socket(AF_INET, SOCK_RAW, proto->p_proto);
+    *socktype = SOCK_RAW;
+    s = socket(AF_INET, *socktype, proto->p_proto);
     if (s < 0) {
         /* try non-privileged icmp (works on Mac OSX without privileges, for example) */
-        s = socket(AF_INET, SOCK_DGRAM, proto->p_proto);
+        *socktype = SOCK_DGRAM;
+        s = socket(AF_INET, *socktype, proto->p_proto);
         if (s < 0) {
-            errno_crash_and_burn("can't create socket (must run as root?)");
+            return -1;
         }
     }
 
@@ -83,21 +85,31 @@ int open_ping_socket_ipv4()
 void init_ping_buffer_ipv4(size_t ping_data_size)
 {
     /* allocate ping buffer */
-    ping_pkt_size = ping_data_size + ICMP_MINLEN;
-    ping_buffer = (char*)calloc(1, ping_pkt_size);
-    if (!ping_buffer)
+    ping_pkt_size_ipv4 = ping_data_size + ICMP_MINLEN;
+    ping_buffer_ipv4 = (char*)calloc(1, ping_pkt_size_ipv4);
+    if (!ping_buffer_ipv4)
         crash_and_burn("can't malloc ping packet");
 }
 
-void socket_set_src_addr_ipv4(int s, FPING_INADDR src_addr)
+void socket_set_src_addr_ipv4(int s, struct in_addr* src_addr, int *ident)
 {
     struct sockaddr_in sa;
-    memset(&sa, 0, sizeof(sa));
-    sa.sin_family = AF_INET;
-    sa.sin_addr = src_addr;
+    socklen_t len = sizeof(sa);
 
-    if (bind(s, (struct sockaddr*)&sa, sizeof(sa)) < 0)
+    memset(&sa, 0, len);
+    sa.sin_family = AF_INET;
+    sa.sin_addr = *src_addr;
+    if (bind(s, (struct sockaddr*)&sa, len) < 0)
         errno_crash_and_burn("cannot bind source address");
+
+    if (ident) {
+        memset(&sa, 0, len);
+        if (getsockname(s, (struct sockaddr *)&sa, &len) < 0)
+            errno_crash_and_burn("can't get ICMP socket identity");
+
+        if (sa.sin_port)
+            *ident = sa.sin_port;
+    }
 }
 
 unsigned short calcsum(unsigned short* buffer, int length)
@@ -121,24 +133,28 @@ int socket_sendto_ping_ipv4(int s, struct sockaddr* saddr, socklen_t saddr_len,
 {
     struct icmp* icp;
     int n;
+    size_t i;
 
-    icp = (struct icmp*)ping_buffer;
+    icp = (struct icmp*)ping_buffer_ipv4;
 
     icp->icmp_type = ICMP_ECHO;
     icp->icmp_code = 0;
     icp->icmp_cksum = 0;
     icp->icmp_seq = htons(icmp_seq_nr);
-    icp->icmp_id = htons(icmp_id_nr);
-
-    if (random_data_flag) {
-        for (n = ((void*)&icp->icmp_data - (void*)icp); n < ping_pkt_size; ++n) {
-            ping_buffer[n] = random() & 0xFF;
+    icp->icmp_id = icmp_id_nr;
+
+    if (nonzero_payload_flag) {
+        // for (n = ((char*)&icp->icmp_data - (char*)icp); n < ping_pkt_size_ipv4; ++n) {
+        //     ping_buffer_ipv4[n] = random() & 0xFF;
+        // }
+        for(n = (char*) &icp->icmp_data - (char*)icp, i = 0xA; n < ping_pkt_size_ipv4; ++n, i += 1) {
+            ping_buffer_ipv4[n] = i & 0xFF;
         }
     }
 
-    icp->icmp_cksum = calcsum((unsigned short*)icp, ping_pkt_size);
+    icp->icmp_cksum = calcsum((unsigned short*)icp, ping_pkt_size_ipv4);
 
-    n = sendto(s, icp, ping_pkt_size, 0, saddr, saddr_len);
+    n = sendto(s, icp, ping_pkt_size_ipv4, 0, saddr, saddr_len);
 
     return n;
 }

src/socket6.c

@@ -43,25 +43,27 @@
 
 #include <netinet/icmp6.h>
 
-char* ping_buffer = 0;
-size_t ping_pkt_size;
+char* ping_buffer_ipv6 = 0;
+size_t ping_pkt_size_ipv6;
 
-int open_ping_socket_ipv6()
+int open_ping_socket_ipv6(int *socktype)
 {
     struct protoent* proto;
     int s;
 
-    /* confirm that ICMP is available on this machine */
+    /* confirm that ICMP6 is available on this machine */
     if ((proto = getprotobyname("ipv6-icmp")) == NULL)
-        crash_and_burn("icmp: unknown protocol");
+        crash_and_burn("ipv6-icmp: unknown protocol");
 
-    /* create raw socket for ICMP calls (ping) */
-    s = socket(AF_INET6, SOCK_RAW, proto->p_proto);
+    /* create raw socket for ICMP6 calls (ping) */
+    *socktype = SOCK_RAW;
+    s = socket(AF_INET6, *socktype, proto->p_proto);
     if (s < 0) {
-        /* try non-privileged icmp (works on Mac OSX without privileges, for example) */
-        s = socket(AF_INET6, SOCK_DGRAM, proto->p_proto);
+        /* try non-privileged icmp6 (works on Mac OSX without privileges, for example) */
+        *socktype = SOCK_DGRAM;
+        s = socket(AF_INET6, *socktype, proto->p_proto);
         if (s < 0) {
-            errno_crash_and_burn("can't create raw socket (must run as root?)");
+            return -1;
         }
     }
 
@@ -82,43 +84,54 @@ int open_ping_socket_ipv6()
 void init_ping_buffer_ipv6(size_t ping_data_size)
 {
     /* allocate ping buffer */
-    ping_pkt_size = ping_data_size + sizeof(struct icmp6_hdr);
-    ping_buffer = (char*)calloc(1, ping_pkt_size);
-    if (!ping_buffer)
+    ping_pkt_size_ipv6 = ping_data_size + sizeof(struct icmp6_hdr);
+    ping_buffer_ipv6 = (char*)calloc(1, ping_pkt_size_ipv6);
+    if (!ping_buffer_ipv6)
         crash_and_burn("can't malloc ping packet");
 }
 
-void socket_set_src_addr_ipv6(int s, FPING_INADDR src_addr)
+void socket_set_src_addr_ipv6(int s, struct in6_addr* src_addr, int *ident)
 {
     struct sockaddr_in6 sa;
+    socklen_t len = sizeof(sa);
+
     memset(&sa, 0, sizeof(sa));
     sa.sin6_family = AF_INET6;
-    sa.sin6_addr = src_addr;
-
+    sa.sin6_addr = *src_addr;
     if (bind(s, (struct sockaddr*)&sa, sizeof(sa)) < 0)
         errno_crash_and_burn("cannot bind source address");
+
+    if (ident) {
+        memset(&sa, 0, len);
+        if (getsockname(s, (struct sockaddr *)&sa, &len) < 0)
+            errno_crash_and_burn("can't get ICMP6 socket identity");
+
+        if (sa.sin6_port)
+            *ident = sa.sin6_port;
+    }
 }
 
 int socket_sendto_ping_ipv6(int s, struct sockaddr* saddr, socklen_t saddr_len, uint16_t icmp_seq_nr, uint16_t icmp_id_nr)
 {
     struct icmp6_hdr* icp;
     int n;
+    size_t i;
 
-    icp = (struct icmp6_hdr*)ping_buffer;
+    icp = (struct icmp6_hdr*)ping_buffer_ipv6;
     icp->icmp6_type = ICMP6_ECHO_REQUEST;
     icp->icmp6_code = 0;
     icp->icmp6_seq = htons(icmp_seq_nr);
-    icp->icmp6_id = htons(icmp_id_nr);
+    icp->icmp6_id = icmp_id_nr;
 
-    if (random_data_flag) {
-        for (n = sizeof(struct icmp6_hdr); n < ping_pkt_size; ++n) {
-            ping_buffer[n] = random() & 0xFF;
+    if (nonzero_payload_flag) {
+        for (n = sizeof(struct icmp6_hdr), i = 0xA; n < ping_pkt_size_ipv6; ++n, i+=1) {
+            ping_buffer_ipv6[n] = i & 0xFF;
         }
     }
 
     icp->icmp6_cksum = 0; /* The IPv6 stack calculates the checksum for us... */
 
-    n = sendto(s, icp, ping_pkt_size, 0, saddr, saddr_len);
+    n = sendto(s, icp, ping_pkt_size_ipv6, 0, saddr, saddr_len);
 
     return n;
 }

src/test-c89.sh

@@ -1 +0,0 @@
-gcc -DHAVE_CONFIG_H -D_BSD_SOURCE -D_POSIX_SOURCE -I.. -Wall -std=c89 -pedantic -c -o fping.o fping.c