build(deps): bump astral-sh/setup-uv from 5 to 6

Bumps [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv) from 5 to 6.
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](https://github.com/astral-sh/setup-uv/compare/v5...v6)

---
updated-dependencies:
- dependency-name: astral-sh/setup-uv
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.envrc

@@ -0,0 +1 @@
+use flake .

.github/dependabot.yml

@@ -0,0 +1,13 @@
+version: 2
+enable-beta-ecosystems: true
+updates:
+- package-ecosystem: uv
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10

.github/workflows/codeql.yml

@@ -0,0 +1,70 @@
+# 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: [ master ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ master ]
+  schedule:
+    - cron: '31 21 * * 3'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'python' ]
+        # 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@v4
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v3
+      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@v3
+
+    # 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@v3

.github/workflows/pythonpackage.yml

@@ -0,0 +1,38 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: Python package
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+  workflow_dispatch: {}
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        poetry-version: ["main"]
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install uv
+      uses: astral-sh/setup-uv@v6
+      with:
+        version: "0.4.30"
+        enable-cache: true
+        cache-dependency-glob: "uv.lock"
+    - name: Install the project
+      run: uv sync --all-extras --dev
+    - name: Lint with flake8
+      run: uv run flake8 sshuttle tests --count --show-source --statistics
+    - name: Run the automated tests
+      run: uv run pytest -v

.github/workflows/release-please.yml

@@ -0,0 +1,66 @@
+on:
+  push:
+    branches:
+      - master
+
+name: release-please
+
+jobs:
+
+  release-please:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+    outputs:
+      release_created: ${{ steps.release.outputs.release_created }}
+      tag_name: ${{ steps.release.outputs.tag_name }}
+    steps:
+      - uses: googleapis/release-please-action@v4
+        id: release
+        with:
+          token: ${{ secrets.MY_RELEASE_PLEASE_TOKEN }}
+          release-type: python
+
+  build-pypi:
+    name: Build for pypi
+    needs: [release-please]
+    if: ${{ needs.release-please.outputs.release_created == 'true' }}
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python 3.12
+      uses: actions/setup-python@v5
+      with:
+        python-version: 3.12
+    - name: Install uv
+      uses: astral-sh/setup-uv@v6
+      with:
+        version: "0.4.30"
+        enable-cache: true
+        cache-dependency-glob: "uv.lock"
+    - name: Build project
+      run: uv build
+    - name: Store the distribution packages
+      uses: actions/upload-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
+
+  upload-pypi:
+    name: Upload to pypi
+    needs: [build-pypi]
+    runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/sshuttle
+    permissions:
+      id-token: write
+    steps:
+    - name: Download all the dists
+      uses: actions/download-artifact@v4
+      with:
+        name: python-package-distributions
+        path: dist/
+    - name: Publish package distributions to PyPI
+      uses: pypa/gh-action-pypi-publish@release/v1

.gitignore

@@ -1,6 +1,20 @@
+/tmp/
+/.coverage
+/.cache/
+/.eggs/
+/.tox/
+/build/
+/dist/
+/sshuttle.egg-info/
+/docs/_build/
 *.pyc
 *~
 *.8
 /.do_built
 /.do_built.dir
 /.redo
+/.pytest_cache/
+/.python-version
+/.direnv/
+/result
+/.vscode/

.prospector.yml

@@ -0,0 +1,24 @@
+strictness: medium
+
+pylint:
+  disable:
+    - too-many-statements
+    - too-many-locals
+    - too-many-function-args
+    - too-many-arguments
+    - too-many-branches
+    - bare-except
+    - protected-access
+    - no-else-return
+    - unused-argument
+    - method-hidden
+    - arguments-differ
+    - wrong-import-position
+    - raising-bad-type
+
+pep8:
+  options:
+    max-line-length: 79
+
+mccabe:
+  run: false

.readthedocs.yaml

@@ -0,0 +1,13 @@
+version: 2
+
+build:
+  os: ubuntu-20.04
+  tools:
+    python: "3.10"
+  jobs:
+    post_install:
+      - pip install uv
+      - UV_PROJECT_ENVIRONMENT=$READTHEDOCS_VIRTUALENV_PATH uv sync --all-extras --group docs --link-mode=copy
+
+sphinx:
+  configuration: docs/conf.py

.tool-versions

@@ -0,0 +1 @@
+python 3.10.6

CHANGELOG.md

@@ -0,0 +1,54 @@
+# Changelog
+
+## [1.3.1](https://github.com/sshuttle/sshuttle/compare/v1.3.0...v1.3.1) (2025-03-25)
+
+
+### Bug Fixes
+
+* add pycodestyle config ([5942376](https://github.com/sshuttle/sshuttle/commit/5942376090395d0a8dfe38fe012a519268199341))
+* add python lint tools ([ae3c022](https://github.com/sshuttle/sshuttle/commit/ae3c022d1d67de92f1c4712d06eb8ae76c970624))
+* correct bad version number at runtime ([7b66253](https://github.com/sshuttle/sshuttle/commit/7b662536ba92d724ed8f86a32a21282fea66047c))
+* Restore "nft" method ([375810a](https://github.com/sshuttle/sshuttle/commit/375810a9a8910a51db22c9fe4c0658c39b16c9e7))
+
+## [1.3.0](https://github.com/sshuttle/sshuttle/compare/v1.2.0...v1.3.0) (2025-02-23)
+
+
+### Features
+
+* switch to a network namespace on Linux ([8a123d9](https://github.com/sshuttle/sshuttle/commit/8a123d9762b84f168a8ca8c75f73e590954e122d))
+
+
+### Bug Fixes
+
+* prevent UnicodeDecodeError parsing iptables rule with comments ([cbe3d1e](https://github.com/sshuttle/sshuttle/commit/cbe3d1e402cac9d3fbc818fe0cb8a87be2e94348))
+* remove temp build hack ([1f5e6ce](https://github.com/sshuttle/sshuttle/commit/1f5e6cea703db33761fb1c3f999b9624cf3bc7ad))
+* support ':' sign in password ([7fa927e](https://github.com/sshuttle/sshuttle/commit/7fa927ef8ceea6b1b2848ca433b8b3e3b63f0509))
+
+
+### Documentation
+
+* replace nix-env with nix-shell ([340ccc7](https://github.com/sshuttle/sshuttle/commit/340ccc705ebd9499f14f799fcef0b5d2a8055fb4))
+* update installation instructions ([a2d405a](https://github.com/sshuttle/sshuttle/commit/a2d405a6a7f9d1a301311a109f8411f2fe8deb37))
+
+## [1.2.0](https://github.com/sshuttle/sshuttle/compare/v1.1.2...v1.2.0) (2025-02-07)
+
+
+### Features
+
+* Add release-please to build workflow ([d910b64](https://github.com/sshuttle/sshuttle/commit/d910b64be77fd7ef2a5f169b780bfda95e67318d))
+
+
+### Bug Fixes
+
+* Add support for Python 3.11 and Python 3.11 ([a3396a4](https://github.com/sshuttle/sshuttle/commit/a3396a443df14d3bafc3d25909d9221aa182b8fc))
+* bad file descriptor error in windows, fix pytest errors ([d4d0fa9](https://github.com/sshuttle/sshuttle/commit/d4d0fa945d50606360aa7c5f026a0f190b026c68))
+* drop Python 3.8 support ([1084c0f](https://github.com/sshuttle/sshuttle/commit/1084c0f2458c1595b00963b3bd54bd667e4cfc9f))
+* ensure poetry works for Python 3.9 ([693ee40](https://github.com/sshuttle/sshuttle/commit/693ee40c485c70f353326eb0e8f721f984850f5c))
+* fix broken workflow_dispatch CI rule ([4b6f7c6](https://github.com/sshuttle/sshuttle/commit/4b6f7c6a656a752552295863092d3b8af0b42b31))
+* Remove more references to legacy Python versions ([339b522](https://github.com/sshuttle/sshuttle/commit/339b5221bc33254329f79f2374f6114be6f30aed))
+* replace requirements.txt files with poetry ([85dc319](https://github.com/sshuttle/sshuttle/commit/85dc3199a332f9f9f0e4c6037c883a8f88dc09ca))
+* replace requirements.txt files with poetry (2) ([d08f78a](https://github.com/sshuttle/sshuttle/commit/d08f78a2d9777951d7e18f6eaebbcdd279d7683a))
+* replace requirements.txt files with poetry (3) ([62da705](https://github.com/sshuttle/sshuttle/commit/62da70510e8a1f93e8b38870fdebdbace965cd8e))
+* replace requirements.txt files with poetry (4) ([9bcedf1](https://github.com/sshuttle/sshuttle/commit/9bcedf19049e5b3a8ae26818299cc518ec03a926))
+* update nix flake to fix problems ([cda60a5](https://github.com/sshuttle/sshuttle/commit/cda60a52331c7102cff892b9b77c8321e276680a))
+* use Python >= 3.10 for docs ([bf29464](https://github.com/sshuttle/sshuttle/commit/bf294643e283cef9fb285d44e307e958686caf46))

CHANGES.rst

@@ -0,0 +1,315 @@
+==========
+Change log
+==========
+Release notes now moved to https://github.com/sshuttle/sshuttle/releases/
+
+These are the old release notes.
+
+
+1.0.5 - 2020-12-29
+------------------
+
+Added
+~~~~~
+* IPv6 support in nft method.
+* Intercept DNS requests sent by systemd-resolved.
+* Set default tmark.
+* Fix python2 server compatibility.
+* Python 3.9 support.
+
+Fixed
+~~~~~
+* Change license text to LGPL-2.1
+* Fix #494 sshuttle caught in infinite select() loop.
+* Include sshuttle version in verbose output.
+* Add psutil as dependency in setup.py
+* When subnets and excludes are specified with hostnames, use all IPs.
+* Update/document client's handling of IPv4 and IPv6.
+* Update sdnotify.py documentation.
+* Allow no remote to work.
+* Make prefixes in verbose output more consistent.
+* Make nat and nft rules consistent; improve rule ordering.
+* Make server and client handle resolv.conf differently.
+* Fix handling OSError in FirewallClient#__init__
+* Refactor automatic method selection.
+
+Removed
+~~~~~~~
+* Drop testing of Python 3.5
+
+
+1.0.4 - 2020-08-24
+------------------
+
+Fixed
+~~~~~
+* Allow Mux() flush/fill to work with python < 3.5
+* Fix parse_hostport to always return string for host.
+* Require -r/--remote parameter.
+* Add missing package in OpenWRT documentation.
+* Fix doc about --listen option.
+* README: add Ubuntu.
+* Increase IP4 ttl to 63 hops instead of 42.
+* Fix formatting in installation.rst
+
+
+1.0.3 - 2020-07-12
+------------------
+
+Fixed
+~~~~~
+* Ask setuptools to require Python 3.5 and above.
+* Add missing import.
+* Fix formatting typos in usage docs
+
+
+1.0.2 - 2020-06-18
+------------------
+
+Fixed
+~~~~~
+* Leave use of default port to ssh command.
+* Remove unwanted references to Python 2.7 in docs.
+* Replace usage of deprecated imp.
+* Fix connection with @ sign in username.
+
+
+1.0.1 - 2020-06-05
+------------------
+
+Fixed
+~~~~~
+* Errors in python long_documentation.
+
+
+1.0.0 - 2020-06-05
+------------------
+
+Added
+~~~~~
+* Python 3.8 support.
+* sshpass support.
+* Auto sudoers file (#269).
+* option for latency control buffer size.
+* Docs: FreeBSD'.
+* Docs: Nix'.
+* Docs: openwrt'.
+* Docs: install instructions for Fedora'.
+* Docs: install instructions for Arch Linux'.
+* Docs: 'My VPN broke and need a solution fast'.
+
+Removed
+~~~~~~~
+* Python 2.6 support.
+* Python 2.7 support.
+
+Fixed
+~~~~~
+* Remove debug message for getpeername failure.
+* Fix crash triggered by port scans closing socket.
+* Added "Running as a service" to docs.
+* Systemd integration.
+* Trap UnicodeError to handle cases where hostnames returned by DNS are invalid.
+* Formatting error in CHANGES.rst
+* Various errors in documentation.
+* Nftables based method.
+* Make hostwatch locale-independent (#379).
+* Add tproxy udp port mark filter that was missed in #144, fixes #367.
+* Capturing of local DNS servers.
+* Crashing on ECONNABORTED.
+* Size of pf_rule, which grew in OpenBSD 6.4.
+* Use prompt for sudo, not needed for doas.
+* Arch linux installation instructions.
+* tests for existing PR-312 (#337).
+* Hyphen in hostname.
+* Assembler import (#319).
+
+
+0.78.5 - 2019-01-28
+-------------------
+
+Added
+~~~~~
+* doas support as replacement for sudo on OpenBSD.
+* Added ChromeOS section to documentation (#262)
+* Add --no-sudo-pythonpath option
+
+Fixed
+~~~~~
+* Fix forwarding to a single port.
+* Various updates to documentation.
+* Don't crash if we can't look up peername
+* Fix missing string formatting argument
+* Moved sshuttle/tests into tests.
+* Updated bandit config.
+* Replace path /dev/null by os.devnull.
+* Added coverage report to tests.
+* Fixes support for OpenBSD (6.1+) (#282).
+* Close stdin, stdout, and stderr when using syslog or forking to daemon (#283).
+* Changes pf exclusion rules precedence.
+* Fix deadlock with iptables with large ruleset.
+* docs: document --ns-hosts --to-ns and update --dns.
+* Use subprocess.check_output instead of run.
+* Fix potential deadlock condition in nft_get_handle.
+* auto-nets: retrieve routes only if using auto-nets.
+
+
+0.78.4 - 2018-04-02
+-------------------
+
+Added
+~~~~~
+* Add homebrew instructions.
+* Route traffic by linux user.
+* Add nat-like method using nftables instead of iptables.
+
+Changed
+~~~~~~~
+* Talk to custom DNS server on pod, instead of the ones in /etc/resolv.conf.
+* Add new option for overriding destination DNS server.
+* Changed subnet parsing. Previously 10/8 become 10.0.0.0/8.  Now it gets
+  parsed as 0.0.0.10/8.
+* Make hostwatch find both fqdn and hostname.
+* Use versions of python3 greater than 3.5 when available (e.g. 3.6).
+
+Removed
+~~~~~~~
+* Remove Python 2.6 from automatic tests.
+
+Fixed
+~~~~~
+* Fix case where there is no --dns.
+* [pf] Avoid port forwarding from loopback address.
+* Use getaddrinfo to obtain a correct sockaddr.
+* Skip empty lines on incoming routes data.
+* Just skip empty lines of routes data instead of stopping processing.
+* [pf] Load pf kernel module when enabling pf.
+* [pf] Test double restore (ipv4, ipv6) disables only once; test kldload.
+* Fixes UDP and DNS proxies binding to the same socket address.
+* Mock socket bind to avoid depending on local IPs being available in test box.
+* Fix no value passed for argument auto_hosts in hw_main call.
+* Fixed incorrect license information in setup.py.
+* Preserve peer and port properly.
+* Make --to-dns and --ns-host work well together.
+* Remove test that fails under OSX.
+* Specify pip requirements for tests.
+* Use flake8 to find Python syntax errors or undefined names.
+* Fix compatibility with the sudoers file.
+* Stop using SO_REUSEADDR on sockets.
+* Declare 'verbosity' as global variable to placate linters.
+* Adds 'cd sshuttle' after 'git' to README and docs.
+* Documentation for loading options from configuration file.
+* Load options from a file.
+* Fix firewall.py.
+* Move sdnotify after setting up firewall rules.
+* Fix tests on Macos.
+
+
+0.78.3 - 2017-07-09
+-------------------
+The "I should have done a git pull" first release.
+
+Fixed
+~~~~~
+* Order first by port range and only then by swidth
+
+
+0.78.2 - 2017-07-09
+-------------------
+
+Added
+~~~~~
+* Adds support for tunneling specific port ranges (#144).
+* Add support for iproute2.
+* Allow remote hosts with colons in the username.
+* Re-introduce ipfw support for sshuttle on FreeBSD with support for --DNS option as well.
+* Add support for PfSense.
+* Tests and documentation for systemd integration.
+* Allow subnets to be given only by file (-s).
+
+Fixed
+~~~~~
+* Work around non tabular headers in BSD netstat.
+* Fix UDP and DNS support on Python 2.7 with tproxy method.
+* Fixed tests after adding support for iproute2.
+* Small refactoring of netstat/iproute parsing.
+* Set started_by_sshuttle False after disabling pf.
+* Fix punctuation and explain Type=notify.
+* Move pytest-runner to tests_require.
+* Fix warning: closed channel got=STOP_SENDING.
+* Support sdnotify for better systemd integration.
+* Fix #117 to allow for no subnets via file (-s).
+* Fix argument splitting for multi-word arguments.
+* requirements.rst: Fix mistakes.
+* Fix typo, space not required here.
+* Update installation instructions.
+* Support using run from different directory.
+* Ensure we update sshuttle/version.py in run.
+* Don't print python version in run.
+* Add CWD to PYTHONPATH in run.
+
+
+0.78.1 - 2016-08-06
+-------------------
+* Fix readthedocs versioning.
+* Don't crash on ENETUNREACH.
+* Various bug fixes.
+* Improvements to BSD and OSX support.
+
+
+0.78.0 - 2016-04-08
+-------------------
+
+* Don't force IPv6 if IPv6 nameservers supplied. Fixes #74.
+* Call /bin/sh as users shell may not be POSIX compliant. Fixes #77.
+* Use argparse for command line processing. Fixes #75.
+* Remove useless --server option.
+* Support multiple -s (subnet) options. Fixes #86.
+* Make server parts work with old versions of Python. Fixes #81.
+
+
+0.77.2 - 2016-03-07
+-------------------
+
+* Accidentally switched LGPL2 license with GPL2 license in 0.77.1 - now fixed.
+
+
+0.77.1 - 2016-03-07
+-------------------
+
+* Use semantic versioning. http://semver.org/
+* Update GPL 2 license text.
+* New release to fix PyPI.
+
+
+0.77 - 2016-03-03
+-----------------
+
+* Various bug fixes.
+* Fix Documentation.
+* Add fix for MacOS X issue.
+* Add support for OpenBSD.
+
+
+0.76 - 2016-01-17
+-----------------
+
+* Add option to disable IPv6 support.
+* Update documentation.
+* Move documentation, including man page, to Sphinx.
+* Use setuptools-scm for automatic versioning.
+
+
+0.75 - 2016-01-12
+-----------------
+
+* Revert change that broke sshuttle entry point.
+
+
+0.74 - 2016-01-10
+-----------------
+
+* Add CHANGES.rst file.
+* Numerous bug fixes.
+* Python 3.5 fixes.
+* PF fixes, especially for BSD.

LICENSE

@@ -1,112 +1,125 @@
-		  GNU LIBRARY GENERAL PUBLIC LICENSE
-		       Version 2, June 1991
+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
 
- Copyright (C) 1991 Free Software Foundation, Inc.
-                    675 Mass Ave, Cambridge, MA 02139, USA
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
-[This is the first released version of the library GPL.  It is
- numbered 2 because it goes with version 2 of the ordinary GPL.]
+[This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
 
-			    Preamble
+                            Preamble
 
   The licenses for most software are designed to take away your
 freedom to share and change it.  By contrast, the GNU General Public
 Licenses are intended to guarantee your freedom to share and change
 free software--to make sure the software is free for all its users.
 
-  This license, the Library General Public License, applies to some
-specially designated Free Software Foundation software, and to any
-other libraries whose authors decide to use it.  You can use it for
-your libraries, too.
+  This license, the Lesser General Public License, applies to some
+specially designated software packages--typically libraries--of the
+Free Software Foundation and other authors who decide to use it.  You
+can use it too, but we suggest you first think carefully about whether
+this license or the ordinary General Public License is the better
+strategy to use in any particular case, based on the explanations below.
 
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-this service if you wish), that you receive source code or can get it
-if you want it, that you can change the software or use pieces of it
-in new free programs; and that you know you can do these things.
+  When we speak of free software, we are referring to freedom of use,
+not price.  Our General Public Licenses are designed to make sure that
+you have the freedom to distribute copies of free software (and charge
+for this service if you wish); that you receive source code or can get
+it if you want it; that you can change the software and use pieces of
+it in new free programs; and that you are informed that you can do
+these things.
 
   To protect your rights, we need to make restrictions that forbid
-anyone to deny you these rights or to ask you to surrender the rights.
-These restrictions translate to certain responsibilities for you if
-you distribute copies of the library, or if you modify it.
+distributors to deny you these rights or to ask you to surrender these
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   For example, if you distribute copies of the library, whether gratis
 or for a fee, you must give the recipients all the rights that we gave
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+code.  If you link other code with the library, you must provide
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+with the library after making changes to the library and recompiling
 it.  And you must show them these terms so they know their rights.
 
-  Our method of protecting your rights has two steps: (1) copyright
-the library, and (2) offer you this license which gives you legal
+  We protect your rights with a two-step method: (1) we copyright the
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 permission to copy, distribute and/or modify the library.
 
-  Also, for each distributor's protection, we want to make certain
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+  To protect each distributor, we want to make it very clear that
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+modified by someone else and passed on, the recipients should know
+that what they have is not the original version, so that the original
+author's reputation will not be affected by problems that might be
+introduced by others.
 
-  Finally, any free program is threatened constantly by software
-patents.  We wish to avoid the danger that companies distributing free
-software will individually obtain patent licenses, thus in effect
-transforming the program into proprietary software.  To prevent this,
-we have made it clear that any patent must be licensed for everyone's
-free use or not licensed at all.
+  Finally, software patents pose a constant threat to the existence of
+any free program.  We wish to make sure that a company cannot
+effectively restrict the users of a free program by obtaining a
+restrictive license from a patent holder.  Therefore, we insist that
+any patent license obtained for a version of the library must be
+consistent with the full freedom of use specified in this license.
 
-  Most GNU software, including some libraries, is covered by the ordinary
-GNU General Public License, which was designed for utility programs.  This
-license, the GNU Library General Public License, applies to certain
-designated libraries.  This license is quite different from the ordinary
-one; be sure to read it in full, and don't assume that anything in it is
-the same as in the ordinary license.
+  Most GNU software, including some libraries, is covered by the
+ordinary GNU General Public License.  This license, the GNU Lesser
+General Public License, applies to certain designated libraries, and
+is quite different from the ordinary General Public License.  We use
+this license for certain libraries in order to permit linking those
+libraries into non-free programs.
 
-  The reason we have a separate public license for some libraries is that
-they blur the distinction we usually make between modifying or adding to a
-program and simply using it.  Linking a program with a library, without
-changing the library, is in some sense simply using the library, and is
-analogous to running a utility program or application program.  However, in
-a textual and legal sense, the linked executable is a combined work, a
-derivative of the original library, and the ordinary General Public License
-treats it as such.
+  When a program is linked with a library, whether statically or using
+a shared library, the combination of the two is legally speaking a
+combined work, a derivative of the original library.  The ordinary
+General Public License therefore permits such linking only if the
+entire combination fits its criteria of freedom.  The Lesser General
+Public License permits more lax criteria for linking other code with
+the library.
 
-  Because of this blurred distinction, using the ordinary General
-Public License for libraries did not effectively promote software
-sharing, because most developers did not use the libraries.  We
-concluded that weaker conditions might promote sharing better.
+  We call this license the "Lesser" General Public License because it
+does Less to protect the user's freedom than the ordinary General
+Public License.  It also provides other free software developers Less
+of an advantage over competing non-free programs.  These disadvantages
+are the reason we use the ordinary General Public License for many
+libraries.  However, the Lesser license provides advantages in certain
+special circumstances.
 
-  However, unrestricted linking of non-free programs would deprive the
-users of those programs of all benefit from the free status of the
-libraries themselves.  This Library General Public License is intended to
-permit developers of non-free programs to use free libraries, while
-preserving your freedom as a user of such programs to change the free
-libraries that are incorporated in them.  (We have not seen how to achieve
-this as regards changes in header files, but we have achieved it as regards
-changes in the actual functions of the Library.)  The hope is that this
-will lead to faster development of free libraries.
+  For example, on rare occasions, there may be a special need to
+encourage the widest possible use of a certain library, so that it becomes
+a de-facto standard.  To achieve this, non-free programs must be
+allowed to use the library.  A more frequent case is that a free
+library does the same job as widely used non-free libraries.  In this
+case, there is little to gain by limiting the free library to free
+software only, so we use the Lesser General Public License.
+
+  In other cases, permission to use a particular library in non-free
+programs enables a greater number of people to use a large body of
+free software.  For example, permission to use the GNU C Library in
+non-free programs enables many more people to use the whole GNU
+operating system, as well as its variant, the GNU/Linux operating
+system.
+
+  Although the Lesser General Public License is Less protective of the
+users' freedom, it does ensure that the user of a program that is
+linked with the Library has the freedom and the wherewithal to run
+that program using a modified version of the Library.
 
   The precise terms and conditions for copying, distribution and
 modification follow.  Pay close attention to the difference between a
 "work based on the library" and a "work that uses the library".  The
-former contains code derived from the library, while the latter only
-works together with the library.
-
-  Note that it is possible for a library to be covered by the ordinary
-General Public License rather than by this special one.
+former contains code derived from the library, whereas the latter must
+be combined with the library in order to run.
 
-		  GNU LIBRARY GENERAL PUBLIC LICENSE
+                  GNU LESSER GENERAL PUBLIC LICENSE
    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 
-  0. This License Agreement applies to any software library which
-contains a notice placed by the copyright holder or other authorized
-party saying it may be distributed under the terms of this Library
-General Public License (also called "this License").  Each licensee is
-addressed as "you".
+  0. This License Agreement applies to any software library or other
+program which contains a notice placed by the copyright holder or
+other authorized party saying it may be distributed under the terms of
+this Lesser General Public License (also called "this License").
+Each licensee is addressed as "you".
 
   A "library" means a collection of software functions and/or data
 prepared so as to be conveniently linked with application programs
@@ -255,7 +268,7 @@ distribute the object code for the work under the terms of Section 6.
 Any executables containing that work also fall under Section 6,
 whether or not they are linked directly with the Library itself.
 
-  6. As an exception to the Sections above, you may also compile or
+  6. As an exception to the Sections above, you may also combine or
 link a "work that uses the Library" with the Library to produce a
 work containing portions of the Library, and distribute that work
 under terms of your choice, provided that the terms permit
@@ -282,23 +295,31 @@ of these things:
     Library will not necessarily be able to recompile the application
     to use the modified definitions.)
 
-    b) Accompany the work with a written offer, valid for at
+    b) Use a suitable shared library mechanism for linking with the
+    Library.  A suitable mechanism is one that (1) uses at run time a
+    copy of the library already present on the user's computer system,
+    rather than copying library functions into the executable, and (2)
+    will operate properly with a modified version of the library, if
+    the user installs one, as long as the modified version is
+    interface-compatible with the version that the work was made with.
+
+    c) Accompany the work with a written offer, valid for at
     least three years, to give the same user the materials
     specified in Subsection 6a, above, for a charge no more
     than the cost of performing this distribution.
 
-    c) If distribution of the work is made by offering access to copy
+    d) If distribution of the work is made by offering access to copy
     from a designated place, offer equivalent access to copy the above
     specified materials from the same place.
 
-    d) Verify that the user has already received a copy of these
+    e) Verify that the user has already received a copy of these
     materials or that you have already sent this user a copy.
 
   For an executable, the required form of the "work that uses the
 Library" must include any data and utility programs needed for
 reproducing the executable from it.  However, as a special exception,
-the source code distributed need not include anything that is normally
-distributed (in either source or binary form) with the major
+the materials to be distributed need not include anything that is
+normally distributed (in either source or binary form) with the major
 components (compiler, kernel, and so on) of the operating system on
 which the executable runs, unless that component itself accompanies
 the executable.
@@ -347,7 +368,7 @@ Library), the recipient automatically receives a license from the
 original licensor to copy, distribute, link with or modify the Library
 subject to these terms and conditions.  You may not impose any further
 restrictions on the recipients' exercise of the rights granted herein.
-You are not responsible for enforcing compliance by third parties to
+You are not responsible for enforcing compliance by third parties with
 this License.
 
   11. If, as a consequence of a court judgment or allegation of patent
@@ -390,7 +411,7 @@ excluded.  In such case, this License incorporates the limitation as if
 written in the body of this License.
 
   13. The Free Software Foundation may publish revised and/or new
-versions of the Library General Public License from time to time.
+versions of the Lesser General Public License from time to time.
 Such new versions will be similar in spirit to the present version,
 but may differ in detail to address new problems or concerns.
 
@@ -411,7 +432,7 @@ decision will be guided by the two goals of preserving the free status
 of all derivatives of our free software and of promoting the sharing
 and reuse of software generally.
 
-			    NO WARRANTY
+                            NO WARRANTY
 
   15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
 WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
@@ -434,9 +455,9 @@ FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
 SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
 DAMAGES.
 
-		     END OF TERMS AND CONDITIONS
+                     END OF TERMS AND CONDITIONS
 
-     Appendix: How to Apply These Terms to Your New Libraries
+           How to Apply These Terms to Your New Libraries
 
   If you develop a new library, and you want it to be of the greatest
 possible use to the public, we recommend making it free software that
@@ -453,18 +474,18 @@ convey the exclusion of warranty; and each file should have at least the
     Copyright (C) <year>  <name of author>
 
     This library is free software; you can redistribute it and/or
-    modify it under the terms of the GNU Library General Public
+    modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
-    version 2 of the License, or (at your option) any later version.
+    version 2.1 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-    Library General Public License for more details.
+    Lesser General Public License for more details.
 
-    You should have received a copy of the GNU Library General Public
-    License along with this library; if not, write to the Free
-    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 
 Also add information on how to contact you by electronic and paper mail.
 

MANIFEST.in

@@ -0,0 +1,14 @@
+include *.txt
+include *.rst
+include *.py
+include MANIFEST.in
+include LICENSE
+include run
+include tox.ini
+exclude sshuttle/version.py
+recursive-include docs *.bat
+recursive-include docs *.py
+recursive-include docs *.rst
+recursive-include docs Makefile
+recursive-include sshuttle *.py
+recursive-exclude docs/_build *

README.md

@@ -1,215 +0,0 @@
-
-WARNING:
-On MacOS 10.6 (at least up to 10.6.6), your network will
-stop responding about 10 minutes after the first time you
-start sshuttle, because of a MacOS kernel bug relating to
-arp and the net.inet.ip.scopedroute sysctl.  To fix it,
-just switch your wireless off and on. Sshuttle makes the
-kernel setting it changes permanent, so this won't happen
-again, even after a reboot.
-
-Required Software
-=================
-
- - You need PyXAPI, available here:
-   http://www.pps.univ-paris-diderot.fr/~ylg/PyXAPI/
- - You also need autossh, available in various package management systems
- - Python 2.x, both locally and the remote system
-
-
-sshuttle: where transparent proxy meets VPN meets ssh
-=====================================================
-
-As far as I know, sshuttle is the only program that solves the following
-common case:
-
- - Your client machine (or router) is Linux, FreeBSD, or MacOS.
-
- - You have access to a remote network via ssh.
-
- - You don't necessarily have admin access on the remote network.
-
- - The remote network has no VPN, or only stupid/complex VPN
-    protocols (IPsec, PPTP, etc). Or maybe you <i>are</i> the
-    admin and you just got frustrated with the awful state of
-    VPN tools.
-
- - You don't want to create an ssh port forward for every
-    single host/port on the remote network.
-
- - You hate openssh's port forwarding because it's randomly
-    slow and/or stupid.
- 
- - You can't use openssh's PermitTunnel feature because
-    it's disabled by default on openssh servers; plus it does
-    TCP-over-TCP, which has terrible performance (see below).
-    
-
-Prerequisites
--------------
-
- - sudo, su, or logged in as root on your client machine.
-   (The server doesn't need admin access.)
-   
- - If you use Linux on your client machine:
-   iptables installed on the client, including at
-   least the iptables DNAT, REDIRECT, and ttl modules. 
-   These are installed by default on most Linux distributions. 
-   (The server doesn't need iptables and doesn't need to be
-   Linux.)
-   
- - If you use MacOS or BSD on your client machine:
-   Your kernel needs to be compiled with `IPFIREWALL_FORWARD`
-   (MacOS has this by default) and you need to have ipfw
-   available. (The server doesn't need to be MacOS or BSD.)
-
-
-Obtaining sshuttle
-------------------
-
- - First, go get PyXAPI from the link above
-
- - Clone github.com/jwyllie83/sshuttle/tree/local
-
-
-Usage on (Ubuntu) Linux
------------------------
-
- - `cd packaging; ./make_deb`
-
- - `sudo dpkg -i ./sshuttle-VERSION.deb`
-
- - Check out the files in `/etc/sshuttle`; configure them so your tunnel works
-
- - `sudo service sshuttle start`
-
-
-Usage on other Linuxes and OSes
--------------------------------
-
-  <tt>./sshuttle -r username@sshserver 0.0.0.0/0 -vv</tt>
-
- - There is a shortcut for 0.0.0.0/0 for those that value
-   their wrists
-   <tt>./sshuttle -r username@sshserver 0/0 -vv</tt>
-
- - If you would also like your DNS queries to be proxied
-   through the DNS server of the server you are connect to:
-   <tt>./sshuttle --dns -vvr username@sshserver 0/0</tt>
-
-   The above is probably what you want to use to prevent
-   local network attacks such as Firesheep and friends.
-
-(You may be prompted for one or more passwords; first, the
-local password to become root using either sudo or su, and
-then the remote ssh password.  Or you might have sudo and ssh set
-up to not require passwords, in which case you won't be
-prompted at all.)
-
-Usage Notes
------------
-
-That's it!  Now your local machine can access the remote network as if you
-were right there.  And if your "client" machine is a router, everyone on
-your local network can make connections to your remote network.
-
-You don't need to install sshuttle on the remote server;
-the remote server just needs to have python available. 
-sshuttle will automatically upload and run its source code
-to the remote python interpreter.
-
-This creates a transparent proxy server on your local machine for all IP
-addresses that match 0.0.0.0/0.  (You can use more specific IP addresses if
-you want; use any number of IP addresses or subnets to change which
-addresses get proxied.  Using 0.0.0.0/0 proxies <i>everything</i>, which is
-interesting if you don't trust the people on your local network.)
-
-Any TCP session you initiate to one of the proxied IP addresses will be
-captured by sshuttle and sent over an ssh session to the remote copy of
-sshuttle, which will then regenerate the connection on that end, and funnel
-the data back and forth through ssh.
-
-Fun, right?  A poor man's instant VPN, and you don't even have to have
-admin access on the server.
-
-
-Theory of Operation
--------------------
-
-sshuttle is not exactly a VPN, and not exactly port forwarding.  It's kind
-of both, and kind of neither.
-
-It's like a VPN, since it can forward every port on an entire network, not
-just ports you specify.  Conveniently, it lets you use the "real" IP
-addresses of each host rather than faking port numbers on localhost.
-
-On the other hand, the way it *works* is more like ssh port forwarding than
-a VPN.  Normally, a VPN forwards your data one packet at a time, and
-doesn't care about individual connections; ie. it's "stateless" with respect
-to the traffic.  sshuttle is the opposite of stateless; it tracks every
-single connection.
-
-You could compare sshuttle to something like the old <a
-href="http://en.wikipedia.org/wiki/Slirp">Slirp</a> program, which was a
-userspace TCP/IP implementation that did something similar.  But it
-operated on a packet-by-packet basis on the client side, reassembling the
-packets on the server side.  That worked okay back in the "real live serial
-port" days, because serial ports had predictable latency and buffering.
-
-But you can't safely just forward TCP packets over a TCP session (like ssh),
-because TCP's performance depends fundamentally on packet loss; it
-<i>must</i> experience packet loss in order to know when to slow down!  At
-the same time, the outer TCP session (ssh, in this case) is a reliable
-transport, which means that what you forward through the tunnel <i>never</i>
-experiences packet loss.  The ssh session itself experiences packet loss, of
-course, but TCP fixes it up and ssh (and thus you) never know the
-difference.  But neither does your inner TCP session, and extremely screwy
-performance ensues.
-
-sshuttle assembles the TCP stream locally, multiplexes it statefully over
-an ssh session, and disassembles it back into packets at the other end.  So
-it never ends up doing TCP-over-TCP.  It's just data-over-TCP, which is
-safe.
-
-
-Useless Trivia
---------------
-
-Back in 1998 (12 years ago!  Yikes!), I released the first version of <a
-href="http://alumnit.ca/wiki/?TunnelVisionReadMe">Tunnel Vision</a>, a
-semi-intelligent VPN client for Linux.  Unfortunately, I made two big mistakes: 
-I implemented the key exchange myself (oops), and I ended up doing
-TCP-over-TCP (double oops).  The resulting program worked okay - and people
-used it for years - but the performance was always a bit funny.  And nobody
-ever found any security flaws in my key exchange, either, but that doesn't
-mean anything. :)
-
-The same year, dcoombs and I also released Fast Forward, a proxy server
-supporting transparent proxying.  Among other things, we used it for
-automatically splitting traffic across more than one Internet connection (a
-tool we called "Double Vision").
-
-I was still in university at the time.  A couple years after that, one of my
-professors was working with some graduate students on the technology that
-would eventually become <a href="http://www.slipstream.com/">Slipstream
-Internet Acceleration</a>.  He asked me to do a contract for him to build an
-initial prototype of a transparent proxy server for mobile networks.  The
-idea was similar to sshuttle: if you reassemble and then disassemble the TCP
-packets, you can reduce latency and improve performance vs.  just forwarding
-the packets over a plain VPN or mobile network.  (It's unlikely that any of
-my code has persisted in the Slipstream product today, but the concept is
-still pretty cool.  I'm still horrified that people use plain TCP on
-complex mobile networks with crazily variable latency, for which it was
-never really intended.)
-
-That project I did for Slipstream was what first gave me the idea to merge
-the concepts of Fast Forward, Double Vision, and Tunnel Vision into a single
-program that was the best of all worlds.  And here we are, at last, 10 years
-later.  You're welcome.
-
---
-Avery Pennarun <apenwarr@gmail.com>
-
-Mailing list:
-   Subscribe by sending a message to <sshuttle+subscribe@googlegroups.com>
-   List archives are at: http://groups.google.com/group/sshuttle

README.rst

@@ -0,0 +1,49 @@
+sshuttle: where transparent proxy meets VPN meets ssh
+=====================================================
+
+As far as I know, sshuttle is the only program that solves the following
+common case:
+
+- Your client machine (or router) is Linux, FreeBSD, MacOS or Windows.
+
+- You have access to a remote network via ssh.
+
+- You don't necessarily have admin access on the remote network.
+
+- The remote network has no VPN, or only stupid/complex VPN
+  protocols (IPsec, PPTP, etc). Or maybe you *are* the
+  admin and you just got frustrated with the awful state of
+  VPN tools.
+
+- You don't want to create an ssh port forward for every
+  single host/port on the remote network.
+
+- You hate openssh's port forwarding because it's randomly
+  slow and/or stupid.
+
+- You can't use openssh's PermitTunnel feature because
+  it's disabled by default on openssh servers; plus it does
+  TCP-over-TCP, which has `terrible performance`_.
+
+.. _terrible performance: https://sshuttle.readthedocs.io/en/stable/how-it-works.html
+
+Obtaining sshuttle
+------------------
+
+Please see the documentation_.
+
+.. _Documentation: https://sshuttle.readthedocs.io/en/stable/installation.html
+
+Documentation
+-------------
+The documentation for the stable version is available at:
+https://sshuttle.readthedocs.org/
+
+The documentation for the latest development version is available at:
+https://sshuttle.readthedocs.org/en/latest/
+
+
+Running as a service
+--------------------
+Sshuttle can also be run as a service and configured using a config management system:
+https://medium.com/@mike.reider/using-sshuttle-as-a-service-bec2684a65fe

bandit.yml

@@ -0,0 +1,9 @@
+exclude_dirs:
+  - tests
+skips:
+  - B101
+  - B104
+  - B404
+  - B603
+  - B606
+  - B607

docs/Makefile

@@ -0,0 +1,177 @@
+# Makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS    =
+SPHINXBUILD   = sphinx-build
+PAPER         =
+BUILDDIR      = _build
+
+# User-friendly check for sphinx-build
+ifeq ($(shell which $(SPHINXBUILD) >/dev/null 2>&1; echo $$?), 1)
+$(error The '$(SPHINXBUILD)' command was not found. Make sure you have Sphinx installed, then set the SPHINXBUILD environment variable to point to the full path of the '$(SPHINXBUILD)' executable. Alternatively you can add the directory with the executable to your PATH. If you don't have Sphinx installed, grab it from http://sphinx-doc.org/)
+endif
+
+# Internal variables.
+PAPEROPT_a4     = -D latex_paper_size=a4
+PAPEROPT_letter = -D latex_paper_size=letter
+ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+# the i18n builder cannot share the environment and doctrees with the others
+I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
+
+.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest gettext
+
+help:
+	@echo "Please use \`make <target>' where <target> is one of"
+	@echo "  html       to make standalone HTML files"
+	@echo "  dirhtml    to make HTML files named index.html in directories"
+	@echo "  singlehtml to make a single large HTML file"
+	@echo "  pickle     to make pickle files"
+	@echo "  json       to make JSON files"
+	@echo "  htmlhelp   to make HTML files and a HTML help project"
+	@echo "  qthelp     to make HTML files and a qthelp project"
+	@echo "  devhelp    to make HTML files and a Devhelp project"
+	@echo "  epub       to make an epub"
+	@echo "  latex      to make LaTeX files, you can set PAPER=a4 or PAPER=letter"
+	@echo "  latexpdf   to make LaTeX files and run them through pdflatex"
+	@echo "  latexpdfja to make LaTeX files and run them through platex/dvipdfmx"
+	@echo "  text       to make text files"
+	@echo "  man        to make manual pages"
+	@echo "  texinfo    to make Texinfo files"
+	@echo "  info       to make Texinfo files and run them through makeinfo"
+	@echo "  gettext    to make PO message catalogs"
+	@echo "  changes    to make an overview of all changed/added/deprecated items"
+	@echo "  xml        to make Docutils-native XML files"
+	@echo "  pseudoxml  to make pseudoxml-XML files for display purposes"
+	@echo "  linkcheck  to check all external links for integrity"
+	@echo "  doctest    to run all doctests embedded in the documentation (if enabled)"
+
+clean:
+	rm -rf $(BUILDDIR)/*
+
+html:
+	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
+	@echo
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
+
+dirhtml:
+	$(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILDDIR)/dirhtml
+	@echo
+	@echo "Build finished. The HTML pages are in $(BUILDDIR)/dirhtml."
+
+singlehtml:
+	$(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILDDIR)/singlehtml
+	@echo
+	@echo "Build finished. The HTML page is in $(BUILDDIR)/singlehtml."
+
+pickle:
+	$(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILDDIR)/pickle
+	@echo
+	@echo "Build finished; now you can process the pickle files."
+
+json:
+	$(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILDDIR)/json
+	@echo
+	@echo "Build finished; now you can process the JSON files."
+
+htmlhelp:
+	$(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILDDIR)/htmlhelp
+	@echo
+	@echo "Build finished; now you can run HTML Help Workshop with the" \
+	      ".hhp project file in $(BUILDDIR)/htmlhelp."
+
+qthelp:
+	$(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILDDIR)/qthelp
+	@echo
+	@echo "Build finished; now you can run "qcollectiongenerator" with the" \
+	      ".qhcp project file in $(BUILDDIR)/qthelp, like this:"
+	@echo "# qcollectiongenerator $(BUILDDIR)/qthelp/sshuttle.qhcp"
+	@echo "To view the help file:"
+	@echo "# assistant -collectionFile $(BUILDDIR)/qthelp/sshuttle.qhc"
+
+devhelp:
+	$(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) $(BUILDDIR)/devhelp
+	@echo
+	@echo "Build finished."
+	@echo "To view the help file:"
+	@echo "# mkdir -p $$HOME/.local/share/devhelp/sshuttle"
+	@echo "# ln -s $(BUILDDIR)/devhelp $$HOME/.local/share/devhelp/sshuttle"
+	@echo "# devhelp"
+
+epub:
+	$(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILDDIR)/epub
+	@echo
+	@echo "Build finished. The epub file is in $(BUILDDIR)/epub."
+
+latex:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo
+	@echo "Build finished; the LaTeX files are in $(BUILDDIR)/latex."
+	@echo "Run \`make' in that directory to run these through (pdf)latex" \
+	      "(use \`make latexpdf' here to do that automatically)."
+
+latexpdf:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through pdflatex..."
+	$(MAKE) -C $(BUILDDIR)/latex all-pdf
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+latexpdfja:
+	$(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILDDIR)/latex
+	@echo "Running LaTeX files through platex and dvipdfmx..."
+	$(MAKE) -C $(BUILDDIR)/latex all-pdf-ja
+	@echo "pdflatex finished; the PDF files are in $(BUILDDIR)/latex."
+
+text:
+	$(SPHINXBUILD) -b text $(ALLSPHINXOPTS) $(BUILDDIR)/text
+	@echo
+	@echo "Build finished. The text files are in $(BUILDDIR)/text."
+
+man:
+	$(SPHINXBUILD) -b man $(ALLSPHINXOPTS) $(BUILDDIR)/man
+	@echo
+	@echo "Build finished. The manual pages are in $(BUILDDIR)/man."
+
+texinfo:
+	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	@echo
+	@echo "Build finished. The Texinfo files are in $(BUILDDIR)/texinfo."
+	@echo "Run \`make' in that directory to run these through makeinfo" \
+	      "(use \`make info' here to do that automatically)."
+
+info:
+	$(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILDDIR)/texinfo
+	@echo "Running Texinfo files through makeinfo..."
+	make -C $(BUILDDIR)/texinfo info
+	@echo "makeinfo finished; the Info files are in $(BUILDDIR)/texinfo."
+
+gettext:
+	$(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILDDIR)/locale
+	@echo
+	@echo "Build finished. The message catalogs are in $(BUILDDIR)/locale."
+
+changes:
+	$(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILDDIR)/changes
+	@echo
+	@echo "The overview file is in $(BUILDDIR)/changes."
+
+linkcheck:
+	$(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILDDIR)/linkcheck
+	@echo
+	@echo "Link check complete; look for any errors in the above output " \
+	      "or in $(BUILDDIR)/linkcheck/output.txt."
+
+doctest:
+	$(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILDDIR)/doctest
+	@echo "Testing of doctests in the sources finished, look at the " \
+	      "results in $(BUILDDIR)/doctest/output.txt."
+
+xml:
+	$(SPHINXBUILD) -b xml $(ALLSPHINXOPTS) $(BUILDDIR)/xml
+	@echo
+	@echo "Build finished. The XML files are in $(BUILDDIR)/xml."
+
+pseudoxml:
+	$(SPHINXBUILD) -b pseudoxml $(ALLSPHINXOPTS) $(BUILDDIR)/pseudoxml
+	@echo
+	@echo "Build finished. The pseudo-XML files are in $(BUILDDIR)/pseudoxml."

docs/changes.rst

@@ -0,0 +1 @@
+.. include:: ../CHANGES.rst

docs/chromeos.rst

@@ -0,0 +1,11 @@
+Google ChromeOS
+===============
+
+Currently there is no built in support for running sshuttle directly on
+Google ChromeOS/Chromebooks.
+
+What we can really do is to create a Linux VM with Crostini.  In the default
+stretch/Debian 9 VM, you can then install sshuttle as on any Linux box and
+it just works, as do xterms and ssvncviewer etc.
+
+https://www.reddit.com/r/Crostini/wiki/getstarted/crostini-setup-guide

docs/conf.py

@@ -0,0 +1,261 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# sshuttle documentation build configuration file, created by
+# sphinx-quickstart on Sun Jan 17 12:13:47 2016.
+#
+# This file is execfile()d with the current directory set to its
+# containing dir.
+#
+# Note that not all possible configuration values are present in this
+# autogenerated file.
+#
+# All configuration values have a default; values that are commented out
+# serve to show the default.
+
+import sys
+import os
+sys.path.insert(0, os.path.abspath('..'))
+import sshuttle  # NOQA
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+# sys.path.insert(0, os.path.abspath('.'))
+
+# -- General configuration ------------------------------------------------
+
+# If your documentation needs a minimal Sphinx version, state it here.
+# needs_sphinx = '1.0'
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'sphinx.ext.todo',
+]
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# The suffix of source filenames.
+source_suffix = '.rst'
+
+# The encoding of source files.
+# source_encoding = 'utf-8-sig'
+
+# The master toctree document.
+master_doc = 'index'
+
+# General information about the project.
+project = 'sshuttle'
+copyright = '2016, Brian May'
+
+# The version info for the project you're documenting, acts as replacement for
+# |version| and |release|, also used in various other places throughout the
+# built documents.
+#
+# The full version, including alpha/beta/rc tags.
+release = sshuttle.__version__
+# The short X.Y version.
+version = '.'.join(release.split('.')[:2])
+
+# The language for content autogenerated by Sphinx. Refer to documentation
+# for a list of supported languages.
+# language = None
+
+# There are two options for replacing |today|: either, you set today to some
+# non-false value, then it is used:
+# today = ''
+# Else, today_fmt is used as the format for a strftime call.
+# today_fmt = '%B %d, %Y'
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+exclude_patterns = ['_build']
+
+# The reST default role (used for this markup: `text`) to use for all
+# documents.
+# default_role = None
+
+# If true, '()' will be appended to :func: etc. cross-reference text.
+# add_function_parentheses = True
+
+# If true, the current module name will be prepended to all description
+# unit titles (such as .. function::).
+# add_module_names = True
+
+# If true, sectionauthor and moduleauthor directives will be shown in the
+# output. They are ignored by default.
+# show_authors = False
+
+# The name of the Pygments (syntax highlighting) style to use.
+pygments_style = 'sphinx'
+
+# A list of ignored prefixes for module index sorting.
+# modindex_common_prefix = []
+
+# If true, keep warnings as "system message" paragraphs in the built documents.
+# keep_warnings = False
+
+
+# -- Options for HTML output ----------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+html_theme = 'furo'
+
+# Theme options are theme-specific and customize the look and feel of a theme
+# further.  For a list of options available for each theme, see the
+# documentation.
+# html_theme_options = {}
+
+# Add any paths that contain custom themes here, relative to this directory.
+# html_theme_path = []
+
+# The name for this set of Sphinx documents.  If None, it defaults to
+# "<project> v<release> documentation".
+# html_title = None
+
+# A shorter title for the navigation bar.  Default is the same as html_title.
+# html_short_title = None
+
+# The name of an image file (relative to this directory) to place at the top
+# of the sidebar.
+# html_logo = None
+
+# The name of an image file (within the static path) to use as favicon of the
+# docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
+# pixels large.
+# html_favicon = None
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']
+
+# Add any extra paths that contain custom files (such as robots.txt or
+# .htaccess) here, relative to this directory. These files are copied
+# directly to the root of the documentation.
+# html_extra_path = []
+
+# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
+# using the given strftime format.
+# html_last_updated_fmt = '%b %d, %Y'
+
+# If true, SmartyPants will be used to convert quotes and dashes to
+# typographically correct entities.
+# html_use_smartypants = True
+
+# Custom sidebar templates, maps document names to template names.
+# html_sidebars = {}
+
+# Additional templates that should be rendered to pages, maps page names to
+# template names.
+# html_additional_pages = {}
+
+# If false, no module index is generated.
+# html_domain_indices = True
+
+# If false, no index is generated.
+# html_use_index = True
+
+# If true, the index is split into individual pages for each letter.
+# html_split_index = False
+
+# If true, links to the reST sources are added to the pages.
+# html_show_sourcelink = True
+
+# If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
+# html_show_sphinx = True
+
+# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True.
+# html_show_copyright = True
+
+# If true, an OpenSearch description file will be output, and all pages will
+# contain a <link> tag referring to it.  The value of this option must be the
+# base URL from which the finished HTML is served.
+# html_use_opensearch = ''
+
+# This is the file name suffix for HTML files (e.g. ".xhtml").
+# html_file_suffix = None
+
+# Output file base name for HTML help builder.
+htmlhelp_basename = 'sshuttledoc'
+
+
+# -- Options for LaTeX output ---------------------------------------------
+
+latex_elements = {
+    # The paper size ('letterpaper' or 'a4paper').
+    # 'papersize': 'letterpaper',
+
+    # The font size ('10pt', '11pt' or '12pt').
+    # 'pointsize': '10pt',
+
+    # Additional stuff for the LaTeX preamble.
+    # 'preamble': '',
+}
+
+# Grouping the document tree into LaTeX files. List of tuples
+# (source start file, target name, title,
+#  author, documentclass [howto, manual, or own class]).
+latex_documents = [
+    ('index', 'sshuttle.tex', 'sshuttle documentation', 'Brian May', 'manual'),
+]
+
+# The name of an image file (relative to this directory) to place at the top of
+# the title page.
+# latex_logo = None
+
+# For "manual" documents, if this is true, then toplevel headings are parts,
+# not chapters.
+# latex_use_parts = False
+
+# If true, show page references after internal links.
+# latex_show_pagerefs = False
+
+# If true, show URL addresses after external links.
+# latex_show_urls = False
+
+# Documents to append as an appendix to all manuals.
+# latex_appendices = []
+
+# If false, no module index is generated.
+# latex_domain_indices = True
+
+
+# -- Options for manual page output ---------------------------------------
+
+# One entry per manual page. List of tuples
+# (source start file, name, description, authors, manual section).
+man_pages = [
+    ('manpage', 'sshuttle', 'sshuttle documentation', ['Brian May'], 1)
+]
+
+# If true, show URL addresses after external links.
+# man_show_urls = False
+
+
+# -- Options for Texinfo output -------------------------------------------
+
+# Grouping the document tree into Texinfo files. List of tuples
+# (source start file, target name, title, author,
+#  dir menu entry, description, category)
+texinfo_documents = [
+    ('index', 'sshuttle', 'sshuttle documentation',
+     'Brian May', 'sshuttle', 'A transparent proxy-based VPN using ssh',
+     'Miscellaneous'),
+]
+
+# Documents to append as an appendix to all manuals.
+# texinfo_appendices = []
+
+# If false, no module index is generated.
+# texinfo_domain_indices = True
+
+# How to display URL addresses: 'footnote', 'no', or 'inline'.
+# texinfo_show_urls = 'footnote'
+
+# If true, do not generate a @detailmenu in the "Top" node's menu.
+# texinfo_no_detailmenu = False

docs/how-it-works.rst

@@ -0,0 +1,36 @@
+How it works
+============
+sshuttle is not exactly a VPN, and not exactly port forwarding.  It's kind
+of both, and kind of neither.
+
+It's like a VPN, since it can forward every port on an entire network, not
+just ports you specify.  Conveniently, it lets you use the "real" IP
+addresses of each host rather than faking port numbers on localhost.
+
+On the other hand, the way it *works* is more like ssh port forwarding than
+a VPN.  Normally, a VPN forwards your data one packet at a time, and
+doesn't care about individual connections; ie. it's "stateless" with respect
+to the traffic.  sshuttle is the opposite of stateless; it tracks every
+single connection.
+
+You could compare sshuttle to something like the old `Slirp
+<http://en.wikipedia.org/wiki/Slirp>`_ program, which was a userspace TCP/IP
+implementation that did something similar.  But it operated on a
+packet-by-packet basis on the client side, reassembling the packets on the
+server side.  That worked okay back in the "real live serial port" days,
+because serial ports had predictable latency and buffering.
+
+But you can't safely just forward TCP packets over a TCP session (like ssh),
+because TCP's performance depends fundamentally on packet loss; it
+*must* experience packet loss in order to know when to slow down!  At
+the same time, the outer TCP session (ssh, in this case) is a reliable
+transport, which means that what you forward through the tunnel *never*
+experiences packet loss.  The ssh session itself experiences packet loss, of
+course, but TCP fixes it up and ssh (and thus you) never know the
+difference.  But neither does your inner TCP session, and extremely screwy
+performance ensues.
+
+sshuttle assembles the TCP stream locally, multiplexes it statefully over
+an ssh session, and disassembles it back into packets at the other end.  So
+it never ends up doing TCP-over-TCP.  It's just data-over-TCP, which is
+safe.

docs/index.rst

@@ -0,0 +1,28 @@
+sshuttle: where transparent proxy meets VPN meets ssh
+=====================================================
+
+:Date: |today|
+:Version: |version|
+
+Contents:
+
+.. toctree::
+   :maxdepth: 2
+
+   overview
+   requirements
+   installation
+   usage
+   platform
+   Man Page <manpage>
+   how-it-works
+   support
+   trivia
+   changes
+
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`search`

docs/installation.rst

@@ -0,0 +1,84 @@
+Installation
+============
+
+- Ubuntu 16.04 or later::
+
+      apt-get install sshuttle
+
+- Debian stretch or later::
+
+      apt-get install sshuttle
+
+- Arch Linux::
+
+      pacman -S sshuttle
+
+- Fedora::
+
+      dnf install sshuttle
+
+- openSUSE::
+
+      zypper in sshuttle
+
+- Gentoo::
+
+      emerge -av net-proxy/sshuttle
+
+- NixOS::
+
+      nix-env -iA nixos.sshuttle
+
+- From PyPI::
+
+      sudo pip install sshuttle
+
+- Clone::
+
+      git clone https://github.com/sshuttle/sshuttle.git
+      cd sshuttle
+      sudo ./setup.py install
+
+- FreeBSD::
+
+      # ports
+      cd /usr/ports/net/py-sshuttle && make install clean
+      # pkg
+      pkg install py39-sshuttle
+
+- OpenBSD::
+
+      pkg_add sshuttle
+
+- macOS, via MacPorts::
+
+      sudo port selfupdate
+      sudo port install sshuttle
+
+It is also possible to install into a virtualenv as a non-root user.
+
+- From PyPI::
+
+      python3 -m venv /tmp/sshuttle
+      . /tmp/sshuttle/bin/activate
+      pip install sshuttle
+
+- Clone::
+
+      git clone https://github.com/sshuttle/sshuttle.git
+      cd sshuttle
+      python3 -m venv /tmp/sshuttle
+      . /tmp/sshuttle/bin/activate
+      python -m pip install .
+
+- Homebrew::
+
+      brew install sshuttle
+
+- Nix::
+
+      nix-shell -p sshuttle
+
+- Windows::
+
+      pip install sshuttle

docs/make.bat

@@ -0,0 +1,242 @@
+@ECHO OFF
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+	set SPHINXBUILD=sphinx-build
+)
+set BUILDDIR=_build
+set ALLSPHINXOPTS=-d %BUILDDIR%/doctrees %SPHINXOPTS% .
+set I18NSPHINXOPTS=%SPHINXOPTS% .
+if NOT "%PAPER%" == "" (
+	set ALLSPHINXOPTS=-D latex_paper_size=%PAPER% %ALLSPHINXOPTS%
+	set I18NSPHINXOPTS=-D latex_paper_size=%PAPER% %I18NSPHINXOPTS%
+)
+
+if "%1" == "" goto help
+
+if "%1" == "help" (
+	:help
+	echo.Please use `make ^<target^>` where ^<target^> is one of
+	echo.  html       to make standalone HTML files
+	echo.  dirhtml    to make HTML files named index.html in directories
+	echo.  singlehtml to make a single large HTML file
+	echo.  pickle     to make pickle files
+	echo.  json       to make JSON files
+	echo.  htmlhelp   to make HTML files and a HTML help project
+	echo.  qthelp     to make HTML files and a qthelp project
+	echo.  devhelp    to make HTML files and a Devhelp project
+	echo.  epub       to make an epub
+	echo.  latex      to make LaTeX files, you can set PAPER=a4 or PAPER=letter
+	echo.  text       to make text files
+	echo.  man        to make manual pages
+	echo.  texinfo    to make Texinfo files
+	echo.  gettext    to make PO message catalogs
+	echo.  changes    to make an overview over all changed/added/deprecated items
+	echo.  xml        to make Docutils-native XML files
+	echo.  pseudoxml  to make pseudoxml-XML files for display purposes
+	echo.  linkcheck  to check all external links for integrity
+	echo.  doctest    to run all doctests embedded in the documentation if enabled
+	goto end
+)
+
+if "%1" == "clean" (
+	for /d %%i in (%BUILDDIR%\*) do rmdir /q /s %%i
+	del /q /s %BUILDDIR%\*
+	goto end
+)
+
+
+%SPHINXBUILD% 2> nul
+if errorlevel 9009 (
+	echo.
+	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+	echo.installed, then set the SPHINXBUILD environment variable to point
+	echo.to the full path of the 'sphinx-build' executable. Alternatively you
+	echo.may add the Sphinx directory to PATH.
+	echo.
+	echo.If you don't have Sphinx installed, grab it from
+	echo.http://sphinx-doc.org/
+	exit /b 1
+)
+
+if "%1" == "html" (
+	%SPHINXBUILD% -b html %ALLSPHINXOPTS% %BUILDDIR%/html
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The HTML pages are in %BUILDDIR%/html.
+	goto end
+)
+
+if "%1" == "dirhtml" (
+	%SPHINXBUILD% -b dirhtml %ALLSPHINXOPTS% %BUILDDIR%/dirhtml
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The HTML pages are in %BUILDDIR%/dirhtml.
+	goto end
+)
+
+if "%1" == "singlehtml" (
+	%SPHINXBUILD% -b singlehtml %ALLSPHINXOPTS% %BUILDDIR%/singlehtml
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The HTML pages are in %BUILDDIR%/singlehtml.
+	goto end
+)
+
+if "%1" == "pickle" (
+	%SPHINXBUILD% -b pickle %ALLSPHINXOPTS% %BUILDDIR%/pickle
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished; now you can process the pickle files.
+	goto end
+)
+
+if "%1" == "json" (
+	%SPHINXBUILD% -b json %ALLSPHINXOPTS% %BUILDDIR%/json
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished; now you can process the JSON files.
+	goto end
+)
+
+if "%1" == "htmlhelp" (
+	%SPHINXBUILD% -b htmlhelp %ALLSPHINXOPTS% %BUILDDIR%/htmlhelp
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished; now you can run HTML Help Workshop with the ^
+.hhp project file in %BUILDDIR%/htmlhelp.
+	goto end
+)
+
+if "%1" == "qthelp" (
+	%SPHINXBUILD% -b qthelp %ALLSPHINXOPTS% %BUILDDIR%/qthelp
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished; now you can run "qcollectiongenerator" with the ^
+.qhcp project file in %BUILDDIR%/qthelp, like this:
+	echo.^> qcollectiongenerator %BUILDDIR%\qthelp\sshuttle.qhcp
+	echo.To view the help file:
+	echo.^> assistant -collectionFile %BUILDDIR%\qthelp\sshuttle.ghc
+	goto end
+)
+
+if "%1" == "devhelp" (
+	%SPHINXBUILD% -b devhelp %ALLSPHINXOPTS% %BUILDDIR%/devhelp
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished.
+	goto end
+)
+
+if "%1" == "epub" (
+	%SPHINXBUILD% -b epub %ALLSPHINXOPTS% %BUILDDIR%/epub
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The epub file is in %BUILDDIR%/epub.
+	goto end
+)
+
+if "%1" == "latex" (
+	%SPHINXBUILD% -b latex %ALLSPHINXOPTS% %BUILDDIR%/latex
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished; the LaTeX files are in %BUILDDIR%/latex.
+	goto end
+)
+
+if "%1" == "latexpdf" (
+	%SPHINXBUILD% -b latex %ALLSPHINXOPTS% %BUILDDIR%/latex
+	cd %BUILDDIR%/latex
+	make all-pdf
+	cd %BUILDDIR%/..
+	echo.
+	echo.Build finished; the PDF files are in %BUILDDIR%/latex.
+	goto end
+)
+
+if "%1" == "latexpdfja" (
+	%SPHINXBUILD% -b latex %ALLSPHINXOPTS% %BUILDDIR%/latex
+	cd %BUILDDIR%/latex
+	make all-pdf-ja
+	cd %BUILDDIR%/..
+	echo.
+	echo.Build finished; the PDF files are in %BUILDDIR%/latex.
+	goto end
+)
+
+if "%1" == "text" (
+	%SPHINXBUILD% -b text %ALLSPHINXOPTS% %BUILDDIR%/text
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The text files are in %BUILDDIR%/text.
+	goto end
+)
+
+if "%1" == "man" (
+	%SPHINXBUILD% -b man %ALLSPHINXOPTS% %BUILDDIR%/man
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The manual pages are in %BUILDDIR%/man.
+	goto end
+)
+
+if "%1" == "texinfo" (
+	%SPHINXBUILD% -b texinfo %ALLSPHINXOPTS% %BUILDDIR%/texinfo
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The Texinfo files are in %BUILDDIR%/texinfo.
+	goto end
+)
+
+if "%1" == "gettext" (
+	%SPHINXBUILD% -b gettext %I18NSPHINXOPTS% %BUILDDIR%/locale
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The message catalogs are in %BUILDDIR%/locale.
+	goto end
+)
+
+if "%1" == "changes" (
+	%SPHINXBUILD% -b changes %ALLSPHINXOPTS% %BUILDDIR%/changes
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.The overview file is in %BUILDDIR%/changes.
+	goto end
+)
+
+if "%1" == "linkcheck" (
+	%SPHINXBUILD% -b linkcheck %ALLSPHINXOPTS% %BUILDDIR%/linkcheck
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Link check complete; look for any errors in the above output ^
+or in %BUILDDIR%/linkcheck/output.txt.
+	goto end
+)
+
+if "%1" == "doctest" (
+	%SPHINXBUILD% -b doctest %ALLSPHINXOPTS% %BUILDDIR%/doctest
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Testing of doctests in the sources finished, look at the ^
+results in %BUILDDIR%/doctest/output.txt.
+	goto end
+)
+
+if "%1" == "xml" (
+	%SPHINXBUILD% -b xml %ALLSPHINXOPTS% %BUILDDIR%/xml
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The XML files are in %BUILDDIR%/xml.
+	goto end
+)
+
+if "%1" == "pseudoxml" (
+	%SPHINXBUILD% -b pseudoxml %ALLSPHINXOPTS% %BUILDDIR%/pseudoxml
+	if errorlevel 1 exit /b 1
+	echo.
+	echo.Build finished. The pseudo-XML files are in %BUILDDIR%/pseudoxml.
+	goto end
+)
+
+:end

docs/manpage.rst

@@ -0,0 +1,503 @@
+sshuttle
+========
+
+
+Synopsis
+--------
+**sshuttle** [*options*] **-r** *[username@]sshserver[:port]* \<*subnets* ...\>
+
+
+Description
+-----------
+:program:`sshuttle` allows you to create a VPN connection from your
+machine to any remote server that you can connect to via ssh, as long
+as that server has a sufficiently new Python installation.
+
+To work, you must have root access on the local machine,
+but you can have a normal account on the server.
+
+It's valid to run :program:`sshuttle` more than once simultaneously on
+a single client machine, connecting to a different server
+every time, so you can be on more than one VPN at once.
+
+If run on a router, :program:`sshuttle` can forward traffic for your
+entire subnet to the VPN.
+
+
+Options
+-------
+.. program:: sshuttle
+
+.. option:: <subnets>
+
+    A list of subnets to route over the VPN, in the form
+    ``a.b.c.d[/width][port[-port]]``. Valid examples are 1.2.3.4 (a
+    single IP address) and 1.2.3.4/32 (equivalent to 1.2.3.4),
+    1.2.3.0/24 (a 24-bit subnet, ie. with a 255.255.255.0 netmask).
+    Specify subnets 0/0 to match all IPv4 addresses and ::/0 to match
+    all IPv6 addresses. Any of the previous examples are also valid if
+    you append a port or a port range, so 1.2.3.4:8000 will only
+    tunnel traffic that has as the destination port 8000 of 1.2.3.4
+    and 1.2.3.0/24:8000-9000 will tunnel traffic going to any port
+    between 8000 and 9000 (inclusive) for all IPs in the 1.2.3.0/24
+    subnet. A hostname can be provided instead of an IP address. If
+    the hostname resolves to multiple IPs, all of the IPs are
+    included. If a width is provided with a hostname, the width is
+    applied to all of the hostnames IPs (if they are all either IPv4
+    or IPv6). Widths cannot be supplied to hostnames that resolve to
+    both IPv4 and IPv6. Valid examples are example.com,
+    example.com:8000, example.com/24, example.com/24:8000 and
+    example.com:8000-9000.
+
+.. option:: --method <auto|nat|nft|tproxy|pf|ipfw>
+
+   Which firewall method should sshuttle use? For auto, sshuttle attempts to
+   guess the appropriate method depending on what it can find in PATH. The
+   default value is auto.
+
+.. option:: -l <[ip:]port>, --listen=<[ip:]port>
+
+    Use this ip address and port number as the transparent
+    proxy port.  By default :program:`sshuttle` finds an available
+    port automatically and listens on IP 127.0.0.1
+    (localhost), so you don't need to override it, and
+    connections are only proxied from the local machine,
+    not from outside machines.  If you want to accept
+    connections from other machines on your network (ie. to
+    run :program:`sshuttle` on a router) try enabling IP Forwarding in
+    your kernel, then using ``--listen 0.0.0.0:0``.
+    You can use any name resolving to an IP address of the machine running
+    :program:`sshuttle`, e.g. ``--listen localhost``.
+
+    For the nft, tproxy and pf methods this can be an IPv6 address. Use
+    this option with comma separated values if required, to provide both
+    IPv4 and IPv6 addresses, e.g. ``--listen 127.0.0.1:0,[::1]:0``.
+
+.. option:: -H, --auto-hosts
+
+    Scan for remote hostnames and update the local /etc/hosts
+    file with matching entries for as long as the VPN is
+    open.  This is nicer than changing your system's DNS
+    (/etc/resolv.conf) settings, for several reasons.  First,
+    hostnames are added without domain names attached, so
+    you can ``ssh thatserver`` without worrying if your local
+    domain matches the remote one.  Second, if you :program:`sshuttle`
+    into more than one VPN at a time, it's impossible to
+    use more than one DNS server at once anyway, but
+    :program:`sshuttle` correctly merges /etc/hosts entries between
+    all running copies.  Third, if you're only routing a
+    few subnets over the VPN, you probably would prefer to
+    keep using your local DNS server for everything else.
+
+    :program:`sshuttle` tries to store a cache of the hostnames in
+    ~/.sshuttle.hosts on the remote host. Similarly, it tries to read
+    the file when you later reconnect to the host with --auto-hosts
+    enabled to quickly populate the host list. When troubleshooting
+    this feature, try removing this file on the remote host when
+    sshuttle is not running.
+
+.. option:: -N, --auto-nets
+
+    In addition to the subnets provided on the command
+    line, ask the server which subnets it thinks we should
+    route, and route those automatically.  The suggestions
+    are taken automatically from the server's routing
+    table.
+
+    This feature does not detect IPv6 routes. Specify IPv6 subnets
+    manually. For example, specify the ``::/0`` subnet on the command
+    line to route all IPv6 traffic.
+
+.. option:: --dns
+
+    Capture local DNS requests and forward to the remote DNS
+    server. All queries to any of the local system's DNS
+    servers (/etc/resolv.conf and, if it exists,
+    /run/systemd/resolve/resolv.conf) will be intercepted and
+    resolved on the remote side of the tunnel instead, there
+    using the DNS specified via the :option:`--to-ns` option,
+    if specified. Only plain DNS traffic sent to these servers
+    on port 53 are captured.
+
+.. option:: --ns-hosts=<server1[,server2[,server3[...]]]>
+
+    Capture local DNS requests to the specified server(s)
+    and forward to the remote DNS server. Contrary to the
+    :option:`--dns` option, this flag allows to specify the
+    DNS server(s) the queries to which to intercept,
+    instead of intercepting all DNS traffic on the local
+    machine. This can be useful when only certain DNS
+    requests should be resolved on the remote side of the
+    tunnel, e.g. in combination with dnsmasq.
+
+.. option:: --to-ns=<server>
+
+    The DNS to forward requests to when remote DNS
+    resolution is enabled. If not given, sshuttle will
+    simply resolve using the system configured resolver on
+    the remote side (via /etc/resolv.conf on the remote
+    side).
+
+.. option:: --python
+
+    Specify the name/path of the remote python interpreter. The
+    default is to use ``python3`` (or ``python``, if ``python3``
+    fails) in the remote system's PATH.
+
+.. option:: -r <[username@]sshserver[:port]>, --remote=<[username@]sshserver[:port]>
+
+    The remote hostname and optional username and ssh
+    port number to use for connecting to the remote server.
+    For example, example.com, testuser@example.com,
+    testuser@example.com:2222, or example.com:2244. This
+    hostname is passed to ssh, so it will recognize any
+    aliases and settings you may have configured in
+    ~/.ssh/config.
+
+.. option:: -x <subnet>, --exclude=<subnet>
+
+    Explicitly exclude this subnet from forwarding.  The
+    format of this option is the same as the ``<subnets>``
+    option.  To exclude more than one subnet, specify the
+    ``-x`` option more than once.  You can say something like
+    ``0/0 -x 1.2.3.0/24`` to forward everything except the
+    local subnet over the VPN, for example.
+
+.. option:: -X <file>, --exclude-from=<file>
+
+    Exclude the subnets specified in a file, one subnet per
+    line. Useful when you have lots of subnets to exclude.
+
+.. option:: -v, --verbose
+
+    Print more information about the session.  This option
+    can be used more than once for increased verbosity.  By
+    default, :program:`sshuttle` prints only error messages.
+
+.. option:: -e, --ssh-cmd
+
+    The command to use to connect to the remote server. The
+    default is just ``ssh``.  Use this if your ssh client is
+    in a non-standard location or you want to provide extra
+    options to the ssh command, for example, ``-e 'ssh -v'``.
+
+.. option:: --remote-shell
+
+    For Windows targets, specify configured remote shell program alternative to defacto posix shell.
+    It would be either ``cmd`` or ``powershell`` unless something like git-bash is in use.
+
+.. option:: --no-cmd-delimiter
+
+    Do not add a double dash (--) delimiter before invoking Python on
+    the remote host. This option is useful when the ssh command used
+    to connect is a custom command that does not interpret this
+    delimiter correctly.
+
+.. option:: --seed-hosts
+
+    A comma-separated list of hostnames to use to
+    initialize the :option:`--auto-hosts` scan algorithm.
+    :option:`--auto-hosts` does things like poll netstat output
+    for lists of local hostnames, but can speed things up
+    if you use this option to give it a few names to start
+    from.
+
+    If this option is used *without* :option:`--auto-hosts`,
+    then the listed hostnames will be scanned and added, but
+    no further hostnames will be added.
+
+.. option:: --no-latency-control
+
+    Sacrifice latency to improve bandwidth benchmarks. ssh
+    uses really big socket buffers, which can overload the
+    connection if you start doing large file transfers,
+    thus making all your other sessions inside the same
+    tunnel go slowly. Normally, :program:`sshuttle` tries to avoid
+    this problem using a "fullness check" that allows only
+    a certain amount of outstanding data to be buffered at
+    a time.  But on high-bandwidth links, this can leave a
+    lot of your bandwidth underutilized.  It also makes
+    :program:`sshuttle` seem slow in bandwidth benchmarks (benchmarks
+    rarely test ping latency, which is what :program:`sshuttle` is
+    trying to control).  This option disables the latency
+    control feature, maximizing bandwidth usage.  Use at
+    your own risk.
+
+.. option:: --latency-buffer-size
+
+    Set the size of the buffer used in latency control. The
+    default is ``32768``. Changing this option allows a compromise
+    to be made between latency and bandwidth without completely
+    disabling latency control (with :option:`--no-latency-control`).
+
+.. option:: -D, --daemon
+
+    Automatically fork into the background after connecting
+    to the remote server.  Implies :option:`--syslog`.
+
+.. option:: -s <file>, --subnets=<file>
+
+    Include the subnets specified in a file instead of on the
+    command line. One subnet per line.
+
+.. option:: --syslog
+
+    after connecting, send all log messages to the
+    :manpage:`syslog(3)` service instead of stderr.  This is
+    implicit if you use :option:`--daemon`.
+
+.. option:: --pidfile=<pidfilename>
+
+    when using :option:`--daemon`, save :program:`sshuttle`'s pid to
+    *pidfilename*.  The default is ``sshuttle.pid`` in the
+    current directory.
+
+.. option:: --disable-ipv6
+
+    Disable IPv6 support for methods that support it (nat, nft,
+    tproxy, and pf).
+
+.. option:: --firewall
+
+    (internal use only) run the firewall manager.  This is
+    the only part of :program:`sshuttle` that must run as root.  If
+    you start :program:`sshuttle` as a non-root user, it will
+    automatically run ``sudo`` or ``su`` to start the firewall
+    manager, but the core of :program:`sshuttle` still runs as a
+    normal user.
+
+.. option:: --hostwatch
+
+    (internal use only) run the hostwatch daemon.  This
+    process runs on the server side and collects hostnames for
+    the :option:`--auto-hosts` option.  Using this option by itself
+    makes it a lot easier to debug and test the :option:`--auto-hosts`
+    feature.
+
+.. option:: --sudoers-no-modify
+
+    sshuttle prints a configuration to stdout which allows a user to
+    run sshuttle without a password. This option is INSECURE because,
+    with some cleverness, it also allows the user to run any command
+    as root without a password. The output also includes a suggested
+    method for you to install the configuration.
+
+    Use --sudoers-user to modify the user that it applies to.
+
+.. option:: --sudoers-user
+
+    Set the user name or group with %group_name for passwordless
+    operation. Default is the current user. Set to ALL for all users
+    (NOT RECOMMENDED: See note about security in --sudoers-no-modify
+    documentation above). Only works with the --sudoers-no-modify
+    option.
+
+.. option:: -t <mark>, --tmark=<mark>
+
+    An option used by the tproxy method: Use the specified traffic
+    mark. The mark must be a hexadecimal value. Defaults to 0x01.
+
+.. option:: --version
+
+    Print program version.
+
+
+Configuration File
+------------------
+All the options described above can optionally be specified in a configuration
+file.
+
+To run :program:`sshuttle` with options defined in, e.g., `/etc/sshuttle.conf`
+just pass the path to the file preceded by the `@` character, e.g.
+`@/etc/sshuttle.conf`.
+
+When running :program:`sshuttle` with options defined in a configuration file,
+options can still be passed via the command line in addition to what is
+defined in the file. If a given option is defined both in the file and in
+the command line, the value in the command line will take precedence.
+
+Arguments read from a file must be one per line, as shown below::
+
+    value
+    --option1
+    value1
+    --option2
+    value2
+
+The configuration file supports comments for human-readable
+annotations. For example::
+
+    # company-internal API
+    8.8.8.8/32
+    # home IoT
+    192.168.63.0/24
+
+
+Environment Variable
+--------------------
+
+You can specify command line options with the `SSHUTTLE_ARGS` environment
+variable. If a given option is defined in both the environment variable and
+command line, the value on the command line will take precedence.
+
+For example::
+
+    SSHUTTLE_ARGS="-e 'ssh -v' --dns" sshuttle -r example.com 0/0
+
+
+Examples
+--------
+
+Use the following command to route all IPv4 TCP traffic through remote
+(-r) host example.com (and possibly other traffic too, depending on
+the selected --method). The 0/0 subnet, short for 0.0.0.0/0, matches
+all IPv4 addresses. The ::/0 subnet, matching all IPv6 addresses could
+be added to the example. We also exclude (-x) example.com:22 so that
+we can establish ssh connections from our local machine to the remote
+host without them being routed through sshuttle. Excluding the remote
+host may be necessary on some machines for sshuttle to work properly.
+Press Ctrl+C to exit. To also route DNS queries through sshuttle, try
+adding --dns. Add or remove -v options to see more or less
+information::
+
+    $ sshuttle -r example.com -x example.com:22 0/0
+
+    Starting sshuttle proxy (version ...).
+    [local sudo] Password:
+    fw: Starting firewall with Python version 3.9.5
+    fw: ready method name nat.
+    c : IPv6 disabled since it isn't supported by method nat.
+    c : Method: nat
+    c : IPv4: on
+    c : IPv6: off (not available with nat method)
+    c : UDP : off (not available with nat method)
+    c : DNS : off (available)
+    c : User: off (available)
+    c : Subnets to forward through remote host (type, IP, cidr mask width, startPort, endPort):
+    c :   (<AddressFamily.AF_INET: 2>, '0.0.0.0', 0, 0, 0)
+    c : Subnets to exclude from forwarding:
+    c :   (<AddressFamily.AF_INET: 2>, '...', 32, 22, 22)
+    c :   (<AddressFamily.AF_INET: 2>, '127.0.0.1', 32, 0, 0)
+    c : TCP redirector listening on ('127.0.0.1', 12299).
+    c : Starting client with Python version 3.9.5
+    c : Connecting to server...
+    user@example.com's password:
+     s: Starting server with Python version 3.6.8
+     s: latency control setting = True
+     s: auto-nets:False
+    c : Connected to server.
+    fw: setting up.
+    fw: iptables -w -t nat -N sshuttle-12299
+    fw: iptables -w -t nat -F sshuttle-12299
+    ...
+    Accept: 192.168.42.121:60554 -> 77.141.99.22:22.
+    ^C
+    c : Keyboard interrupt: exiting.
+    c : SW'unknown':Mux#1: deleting (1 remain)
+    c : SW#7:192.168.42.121:60554: deleting (0 remain)
+
+
+Connect to a remote server, with automatic hostname
+and subnet guessing::
+
+    $ sshuttle -vNHr example.com -x example.com:22
+    Starting sshuttle proxy (version ...).
+    [local sudo] Password:
+    fw: Starting firewall with Python version 3.9.5
+    fw: ready method name nat.
+    c : IPv6 disabled since it isn't supported by method nat.
+    c : Method: nat
+    c : IPv4: on
+    c : IPv6: off (not available with nat method)
+    c : UDP : off (not available with nat method)
+    c : DNS : off (available)
+    c : User: off (available)
+    c : Subnets to forward through remote host (type, IP, cidr mask width, startPort, endPort):
+    c : NOTE: Additional subnets to forward may be added below by --auto-nets.
+    c : Subnets to exclude from forwarding:
+    c :   (<AddressFamily.AF_INET: 2>, '...', 32, 22, 22)
+    c :   (<AddressFamily.AF_INET: 2>, '127.0.0.1', 32, 0, 0)
+    c : TCP redirector listening on ('127.0.0.1', 12300).
+    c : Starting client with Python version 3.9.5
+    c : Connecting to server...
+    user@example.com's password:
+     s: Starting server with Python version 3.6.8
+     s: latency control setting = True
+     s: auto-nets:True
+    c : Connected to server.
+    c : seed_hosts: []
+     s: available routes:
+     s:   77.141.99.0/24
+    fw: setting up.
+    fw: iptables -w -t nat -N sshuttle-12300
+    fw: iptables -w -t nat -F sshuttle-12300
+    ...
+    c : Accept: 192.168.42.121:60554 -> 77.141.99.22:22.
+    ^C
+    c : Keyboard interrupt: exiting.
+    c : SW'unknown':Mux#1: deleting (1 remain)
+    c : SW#7:192.168.42.121:60554: deleting (0 remain)
+
+Run :program:`sshuttle` with a `/etc/sshuttle.conf` configuration file::
+
+    $ sshuttle @/etc/sshuttle.conf
+
+Use the options defined in `/etc/sshuttle.conf` but be more verbose::
+
+    $ sshuttle @/etc/sshuttle.conf -vvv
+
+Override the remote server defined in `/etc/sshuttle.conf`::
+
+    $ sshuttle @/etc/sshuttle.conf -r otheruser@test.example.com
+
+Example configuration file::
+
+    192.168.0.0/16
+    --remote
+    user@example.com
+
+
+Discussion
+----------
+When it starts, :program:`sshuttle` creates an ssh session to the
+server specified by the ``-r`` option.
+
+After connecting to the remote server, :program:`sshuttle` uploads its
+(python) source code to the remote end and executes it
+there.  Thus, you don't need to install :program:`sshuttle` on the
+remote server, and there are never :program:`sshuttle` version
+conflicts between client and server.
+
+Unlike most VPNs, :program:`sshuttle` forwards sessions, not packets.
+That is, it uses kernel transparent proxying (`iptables
+REDIRECT` rules on Linux) to
+capture outgoing TCP sessions, then creates entirely
+separate TCP sessions out to the original destination at
+the other end of the tunnel.
+
+Packet-level forwarding (eg. using the tun/tap devices on
+Linux) seems elegant at first, but it results in
+several problems, notably the 'tcp over tcp' problem.  The
+tcp protocol depends fundamentally on packets being dropped
+in order to implement its congestion control algorithm; if
+you pass tcp packets through a tcp-based tunnel (such as
+ssh), the inner tcp packets will never be dropped, and so
+the inner tcp stream's congestion control will be
+completely broken, and performance will be terrible.  Thus,
+packet-based VPNs (such as IPsec and openvpn) cannot use
+tcp-based encrypted streams like ssh or ssl, and have to
+implement their own encryption from scratch, which is very
+complex and error prone.
+
+:program:`sshuttle`'s simplicity comes from the fact that it can
+safely use the existing ssh encrypted tunnel without
+incurring a performance penalty.  It does this by letting
+the client-side kernel manage the incoming tcp stream, and
+the server-side kernel manage the outgoing tcp stream;
+there is no need for congestion control to be shared
+between the two separate streams, so a tcp-based tunnel is
+fine.
+
+.. seealso::
+
+   :manpage:`ssh(1)`, :manpage:`python(1)`

docs/openwrt.rst

@@ -0,0 +1,8 @@
+OpenWRT
+========
+
+Run::
+
+    opkg install python3 python3-pip iptables-mod-extra iptables-mod-nat-extra iptables-mod-ipopt
+    python3 /usr/bin/pip3 install sshuttle
+    sshuttle -l 0.0.0.0 -r <IP> -x 192.168.1.1 0/0

docs/overview.rst

@@ -0,0 +1,26 @@
+Overview
+========
+
+As far as I know, sshuttle is the only program that solves the following
+common case:
+
+- Your client machine (or router) is Linux, MacOS, FreeBSD, OpenBSD or pfSense.
+
+- You have access to a remote network via ssh.
+
+- You don't necessarily have admin access on the remote network.
+
+- The remote network has no VPN, or only stupid/complex VPN
+  protocols (IPsec, PPTP, etc). Or maybe you *are* the
+  admin and you just got frustrated with the awful state of
+  VPN tools.
+
+- You don't want to create an ssh port forward for every
+  single host/port on the remote network.
+
+- You hate openssh's port forwarding because it's randomly
+  slow and/or stupid.
+
+- You can't use openssh's PermitTunnel feature because
+  it's disabled by default on openssh servers; plus it does
+  TCP-over-TCP, which has terrible performance (see below).

docs/platform.rst

@@ -0,0 +1,12 @@
+Platform Specific Notes
+=======================
+
+Contents:
+
+.. toctree::
+   :maxdepth: 2
+
+   chromeos
+   tproxy
+   windows
+   openwrt

docs/requirements.rst

@@ -0,0 +1,97 @@
+Requirements
+============
+
+Client side Requirements
+------------------------
+
+- sudo, or root access on your client machine.
+  (The server doesn't need admin access.)
+- Python 3.9 or greater.
+
+
+Linux with NAT method
+~~~~~~~~~~~~~~~~~~~~~
+Supports:
+
+* IPv4 TCP
+* IPv4 DNS
+* IPv6 TCP
+* IPv6 DNS
+
+Requires:
+
+* iptables DNAT and REDIRECT modules. ip6tables for IPv6.
+
+Linux with nft method
+~~~~~~~~~~~~~~~~~~~~~
+Supports
+
+* IPv4 TCP
+* IPv4 DNS
+* IPv6 TCP
+* IPv6 DNS
+
+Requires:
+
+* nftables
+
+Linux with TPROXY method
+~~~~~~~~~~~~~~~~~~~~~~~~
+Supports:
+
+* IPv4 TCP
+* IPv4 UDP
+* IPv4 DNS
+* IPv6 TCP
+* IPv6 UDP
+* IPv6 DNS
+
+
+MacOS / FreeBSD / OpenBSD / pfSense
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Method: pf
+
+Supports:
+
+* IPv4 TCP
+* IPv4 DNS
+* IPv6 TCP
+* IPv6 DNS
+
+Requires:
+
+* You need to have the pfctl command.
+
+Windows
+~~~~~~~
+
+Experimental built-in support available. See :doc:`windows` for more information.
+
+
+Server side Requirements
+------------------------
+
+- Python 3.9 or greater.
+
+
+Additional Suggested Software
+-----------------------------
+
+- If you are using systemd, sshuttle can notify it when the connection to
+  the remote end is established and the firewall rules are installed. For
+  this feature to work you must configure the process start-up type for the
+  sshuttle service unit to notify, as shown in the example below.
+
+.. code-block:: ini
+   :emphasize-lines: 6
+
+   [Unit]
+   Description=sshuttle
+   After=network.target
+
+   [Service]
+   Type=notify
+   ExecStart=/usr/bin/sshuttle --dns --remote <user>@<server> <subnets...>
+
+   [Install]
+   WantedBy=multi-user.target

docs/support.rst

@@ -0,0 +1,11 @@
+Support
+=======
+
+Mailing list:
+
+* Subscribe by sending a message to <sshuttle+subscribe@googlegroups.com>
+* List archives are at: http://groups.google.com/group/sshuttle
+
+Issue tracker and pull requests at github:
+
+* https://github.com/sshuttle/sshuttle

docs/tproxy.rst

@@ -0,0 +1,40 @@
+TPROXY
+======
+TPROXY is the only method that supports UDP.
+
+There are some things you need to consider for TPROXY to work:
+
+- The following commands need to be run first as root. This only needs to be
+  done once after booting up::
+
+      ip route add local default dev lo table 100
+      ip rule add fwmark {TMARK} lookup 100
+      ip -6 route add local default dev lo table 100
+      ip -6 rule add fwmark {TMARK} lookup 100
+
+  where {TMARK} is the identifier mark passed with -t or --tmark flag
+  as a hexadecimal string (default value is '0x01').
+
+- The ``--auto-nets`` feature does not detect IPv6 routes automatically. Add IPv6
+  routes manually. e.g. by adding ``'::/0'`` to the end of the command line.
+
+- The client needs to be run as root. e.g.::
+
+      sudo SSH_AUTH_SOCK="$SSH_AUTH_SOCK" $HOME/tree/sshuttle.tproxy/sshuttle --method=tproxy ...
+
+- You may need to exclude the IP address of the server you are connecting to.
+  Otherwise sshuttle may attempt to intercept the ssh packets, which will not
+  work. Use the ``--exclude`` parameter for this.
+
+- You need the ``--method=tproxy`` parameter, as above.
+
+- The routes for the outgoing packets must already exist. For example, if your
+  connection does not have IPv6 support, no IPv6 routes will exist, IPv6
+  packets will not be generated and sshuttle cannot intercept them::
+
+      telnet -6 www.google.com 80
+      Trying 2404:6800:4001:805::1010...
+      telnet: Unable to connect to remote host: Network is unreachable
+
+  Add some dummy routes to external interfaces. Make sure they get removed
+  however after sshuttle exits.

docs/trivia.rst

@@ -0,0 +1,35 @@
+Useless Trivia
+==============
+This section written by the original author, Avery Pennarun
+<apenwarr@gmail.com>.
+
+Back in 1998, I released the first version of `Tunnel
+Vision <http://alumnit.ca/wiki/?TunnelVisionReadMe>`_, a semi-intelligent VPN
+client for Linux.  Unfortunately, I made two big mistakes: I implemented the
+key exchange myself (oops), and I ended up doing TCP-over-TCP (double oops).
+The resulting program worked okay - and people used it for years - but the
+performance was always a bit funny.  And nobody ever found any security flaws
+in my key exchange, either, but that doesn't mean anything. :)
+
+The same year, dcoombs and I also released Fast Forward, a proxy server
+supporting transparent proxying.  Among other things, we used it for
+automatically splitting traffic across more than one Internet connection (a
+tool we called "Double Vision").
+
+I was still in university at the time.  A couple years after that, one of my
+professors was working with some graduate students on the technology that would
+eventually become `Slipstream Internet Acceleration
+<http://www.slipstream.com/>`_.  He asked me to do a contract for him to build
+an initial prototype of a transparent proxy server for mobile networks.  The
+idea was similar to sshuttle: if you reassemble and then disassemble the TCP
+packets, you can reduce latency and improve performance vs.  just forwarding
+the packets over a plain VPN or mobile network.  (It's unlikely that any of my
+code has persisted in the Slipstream product today, but the concept is still
+pretty cool.  I'm still horrified that people use plain TCP on complex mobile
+networks with crazily variable latency, for which it was never really
+intended.)
+
+That project I did for Slipstream was what first gave me the idea to merge
+the concepts of Fast Forward, Double Vision, and Tunnel Vision into a single
+program that was the best of all worlds.  And here we are, at last.
+You're welcome.

docs/usage.rst

@@ -0,0 +1,93 @@
+Usage
+=====
+
+.. note::
+
+    For information on usage with Windows, see the :doc:`windows` section.
+    For information on using the TProxy method, see the :doc:`tproxy` section.
+
+Forward all traffic::
+
+    sshuttle -r username@sshserver 0.0.0.0/0
+
+- Use the :option:`sshuttle -r` parameter to specify a remote server.
+  On some systems, you may also need to use the :option:`sshuttle -x`
+  parameter to exclude sshserver or sshserver:22 so that your local
+  machine can communicate directly to sshserver without it being
+  redirected by sshuttle.
+
+- By default sshuttle will automatically choose a method to use. Override with
+  the :option:`sshuttle --method` parameter.
+
+- There is a shortcut for 0.0.0.0/0 for those that value
+  their wrists::
+
+      sshuttle -r username@sshserver 0/0
+
+
+- For 'My VPN broke and need a temporary solution FAST to access local IPv4 addresses'::
+
+      sshuttle --dns -NHr username@sshserver 10.0.0.0/8 172.16.0.0/12 192.168.0.0/16
+
+If you would also like your DNS queries to be proxied
+through the DNS server of the server you are connect to::
+
+  sshuttle --dns -r username@sshserver 0/0
+
+The above is probably what you want to use to prevent
+local network attacks such as Firesheep and friends.
+See the documentation for the :option:`sshuttle --dns` parameter.
+
+(You may be prompted for one or more passwords; first, the local password to
+become root using sudo, and then the remote ssh password.  Or you might have
+sudo and ssh set up to not require passwords, in which case you won't be
+prompted at all.)
+
+
+Usage Notes
+-----------
+That's it!  Now your local machine can access the remote network as if you
+were right there.  And if your "client" machine is a router, everyone on
+your local network can make connections to your remote network.
+
+You don't need to install sshuttle on the remote server;
+the remote server just needs to have python available.
+sshuttle will automatically upload and run its source code
+to the remote python interpreter.
+
+This creates a transparent proxy server on your local machine for all IP
+addresses that match 0.0.0.0/0.  (You can use more specific IP addresses if
+you want; use any number of IP addresses or subnets to change which
+addresses get proxied.  Using 0.0.0.0/0 proxies *everything*, which is
+interesting if you don't trust the people on your local network.)
+
+Any TCP session you initiate to one of the proxied IP addresses will be
+captured by sshuttle and sent over an ssh session to the remote copy of
+sshuttle, which will then regenerate the connection on that end, and funnel
+the data back and forth through ssh.
+
+Fun, right?  A poor man's instant VPN, and you don't even have to have
+admin access on the server.
+
+Sudoers File
+------------
+
+sshuttle can generate a sudoers.d file for Linux and MacOS. This
+allows one or more users to run sshuttle without entering the
+local sudo password. **WARNING:** This option is *insecure*
+because, with some cleverness, it also allows these users to run any
+command (via the --ssh-cmd option) as root without a password.
+
+To print a sudo configuration file and see a suggested way to install it, run::
+
+  sshuttle --sudoers-no-modify
+
+A custom user or group can be set with the 
+:option:`sshuttle --sudoers-no-modify --sudoers-user {user_descriptor}`
+option. Valid values for this vary based on how your system is configured.
+Values such as usernames, groups prepended with `%` and sudoers user 
+aliases will work. See the sudoers manual for more information on valid
+user-specified actions. The option must be used with `--sudoers-no-modify`::
+
+  sshuttle --sudoers-no-modify --sudoers-user mike
+  sshuttle --sudoers-no-modify --sudoers-user %sudo

docs/windows.rst

@@ -0,0 +1,28 @@
+Microsoft Windows
+=================
+
+Experimental native support::
+
+Experimental built-in support for Windows is available through `windivert` method.
+You have to install https://pypi.org/project/pydivert package.  You need Administrator privileges to use windivert method
+
+Notes
+-  sshuttle should be executed from admin shell (Automatic firewall process admin elevation is not available)
+-  TCP/IPv4 supported (IPv6/UDP/DNS are not available)
+
+Use Linux VM on Windows::
+
+What we can really do is to create a Linux VM with Vagrant (or simply
+Virtualbox if you like). In the Vagrant settings, remember to turn on bridged
+NIC. Then, run sshuttle inside the VM like below::
+
+    sshuttle -l 0.0.0.0 -x 10.0.0.0/8 -x 192.168.0.0/16 0/0
+
+10.0.0.0/8 excludes NAT traffic of Vagrant and 192.168.0.0/16 excludes
+traffic to local area network (assuming that we're using 192.168.0.0 subnet).
+
+Assuming the VM has the IP 192.168.1.200 obtained on the bridge NIC (we can
+configure that in Vagrant), we can then ask Windows to route all its traffic
+via the VM by running the following in cmd.exe with admin right::
+
+    route add 0.0.0.0 mask 0.0.0.0 192.168.1.200

flake.lock

@@ -0,0 +1,133 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1740743217,
+        "narHash": "sha256-brsCRzLqimpyhORma84c3W2xPbIidZlIc3JGIuQVSNI=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b27ba4eb322d9d2bf2dc9ada9fd59442f50c8d7c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-24.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "pyproject-build-systems": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "pyproject-nix": [
+          "pyproject-nix"
+        ],
+        "uv2nix": [
+          "uv2nix"
+        ]
+      },
+      "locked": {
+        "lastModified": 1740362541,
+        "narHash": "sha256-S8Mno07MspggOv/xIz5g8hB2b/C5HPiX8E+rXzKY+5U=",
+        "owner": "pyproject-nix",
+        "repo": "build-system-pkgs",
+        "rev": "e151741c848ba92331af91f4e47640a1fb82be19",
+        "type": "github"
+      },
+      "original": {
+        "owner": "pyproject-nix",
+        "repo": "build-system-pkgs",
+        "type": "github"
+      }
+    },
+    "pyproject-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1739758351,
+        "narHash": "sha256-Aoa4dEoC7Hf6+gFVk/SDquZTMFlmlfsgdTWuqQxzePs=",
+        "owner": "pyproject-nix",
+        "repo": "pyproject.nix",
+        "rev": "1329712f7f9af3a8b270764ba338a455b7323811",
+        "type": "github"
+      },
+      "original": {
+        "owner": "pyproject-nix",
+        "repo": "pyproject.nix",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs",
+        "pyproject-build-systems": "pyproject-build-systems",
+        "pyproject-nix": "pyproject-nix",
+        "uv2nix": "uv2nix"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "uv2nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "pyproject-nix": [
+          "pyproject-nix"
+        ]
+      },
+      "locked": {
+        "lastModified": 1740497536,
+        "narHash": "sha256-K+8wsVooqhaqyxuvew3+62mgOfRLJ7whv7woqPU3Ypo=",
+        "owner": "pyproject-nix",
+        "repo": "uv2nix",
+        "rev": "d01fd3a141755ad5d5b93dd9fcbd76d6401f5bac",
+        "type": "github"
+      },
+      "original": {
+        "owner": "pyproject-nix",
+        "repo": "uv2nix",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,117 @@
+{
+  description = "Transparent proxy server that works as a poor man's VPN. Forwards over ssh. Doesn't require admin. Works with Linux and MacOS. Supports DNS tunneling.";
+
+  inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
+    pyproject-nix = {
+      url = "github:pyproject-nix/pyproject.nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    uv2nix = {
+      url = "github:pyproject-nix/uv2nix";
+      inputs.pyproject-nix.follows = "pyproject-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    pyproject-build-systems = {
+      url = "github:pyproject-nix/build-system-pkgs";
+      inputs.pyproject-nix.follows = "pyproject-nix";
+      inputs.uv2nix.follows = "uv2nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      flake-utils,
+      pyproject-nix,
+      uv2nix,
+      pyproject-build-systems,
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        inherit (nixpkgs) lib;
+
+        pkgs = nixpkgs.legacyPackages.${system};
+
+        python = pkgs.python312;
+
+        workspace = uv2nix.lib.workspace.loadWorkspace { workspaceRoot = ./.; };
+
+        # Create package overlay from workspace.
+        overlay = workspace.mkPyprojectOverlay {
+          sourcePreference = "sdist";
+        };
+
+        # Extend generated overlay with build fixups
+        #
+        # Uv2nix can only work with what it has, and uv.lock is missing essential metadata to perform some builds.
+        # This is an additional overlay implementing build fixups.
+        # See:
+        # - https://pyproject-nix.github.io/uv2nix/FAQ.html
+        pyprojectOverrides =
+          final: prev:
+          # Implement build fixups here.
+          # Note that uv2nix is _not_ using Nixpkgs buildPythonPackage.
+          # It's using https://pyproject-nix.github.io/pyproject.nix/build.html
+          let
+            inherit (final) resolveBuildSystem;
+            inherit (builtins) mapAttrs;
+
+            # Build system dependencies specified in the shape expected by resolveBuildSystem
+            # The empty lists below are lists of optional dependencies.
+            #
+            # A package `foo` with specification written as:
+            # `setuptools-scm[toml]` in pyproject.toml would be written as
+            # `foo.setuptools-scm = [ "toml" ]` in Nix
+            buildSystemOverrides = {
+              chardet.setuptools = [ ];
+              colorlog.setuptools = [ ];
+              python-debian.setuptools = [ ];
+              pluggy.setuptools = [ ];
+              pathspec.flit-core = [ ];
+              packaging.flit-core = [ ];
+            };
+
+          in
+          mapAttrs (
+            name: spec:
+            prev.${name}.overrideAttrs (old: {
+              nativeBuildInputs = old.nativeBuildInputs ++ resolveBuildSystem spec;
+            })
+          ) buildSystemOverrides;
+
+        pythonSet =
+          (pkgs.callPackage pyproject-nix.build.packages {
+            inherit python;
+          }).overrideScope
+            (
+              lib.composeManyExtensions [
+                pyproject-build-systems.overlays.default
+                overlay
+                pyprojectOverrides
+              ]
+            );
+
+        inherit (pkgs.callPackages pyproject-nix.build.util { }) mkApplication;
+        package = mkApplication {
+          venv = pythonSet.mkVirtualEnv "sshuttle" workspace.deps.default;
+          package = pythonSet.sshuttle;
+        };
+      in
+      {
+        packages = {
+          sshuttle = package;
+          default = package;
+        };
+        devShells.default = pkgs.mkShell {
+          packages = [
+            pkgs.uv
+          ];
+        };
+      }
+    );
+}

packaging/control

@@ -1,26 +0,0 @@
-Package: sshuttle
-Version: 0.2
-Architecture: i386
-Maintainer: Jim Wyllie <jwyllie83@gmail.com>
-Depends: autossh, upstart, python (>=2.6)
-Section: utils
-Priority: optional
-Homepage: http://github.com/jwyllie83/sshuttle.udp
-Description: "Full-featured" VPN over an SSH tunnel, allowing full remote
- access somewhere where all you have is an SSH connection.  It works well if
- you generally find yourself in the following situation:
- .
- - Your client machine (or router) is Linux, FreeBSD, or MacOS.
- - You have access to a remote network via ssh.
- - You don't necessarily have admin access on the remote network.
- - You do not wish to, or can't, use other VPN software
- - You don't want to create an ssh port forward for every
-    single host/port on the remote network.
- - You hate openssh's port forwarding because it's randomly
-    slow and/or stupid.
- - You can't use openssh's PermitTunnel feature because
-    it's disabled by default on openssh servers; plus it does
-    TCP-over-TCP, which has suboptimal performance
- .
- It also has hooks for more complicated setups (VPN-in-a-SSH-VPN, etc) to allow
- you to set it up as you like.

packaging/make_deb

@@ -1,41 +0,0 @@
-#!/bin/bash
-#
-# This script puts together a .deb package suitable for installing on an Ubuntu
-# system
-
-B="/tmp/sshuttle/build"
-
-if [ ! -x /usr/bin/dpkg ]; then
-	echo 'Unable to build: dpkg not found on system'
-	exit 1
-fi
-
-# Create the new directory structure
-mkdir -p ${B}/etc/sshuttle/pre-start.d
-mkdir -p ${B}/etc/sshuttle/post-stop.d
-mkdir -p ${B}/usr/share/sshuttle
-mkdir -p ${B}/usr/bin
-mkdir -p ${B}/etc/init
-mkdir -p ${B}/DEBIAN
-
-# Copy over all of the files
-cp -r ../src/* ${B}/usr/share/sshuttle
-cp ../src/sshuttle ${B}/usr/bin
-cp -r sshuttle.conf ${B}/etc/init
-cp prefixes.conf ${B}/etc/sshuttle
-cp tunnel.conf ${B}/etc/sshuttle
-
-# Copy the control file over, as well
-cp control ${B}/DEBIAN
-
-# Create the md5sum manifest
-if [ -x /usr/bin/md5sum ]; then
-	cd ${B}
-	find . -type f | egrep -v DEBIAN | sed -re 's/^..//' | xargs md5sum > ${B}/DEBIAN/md5sums
-	cd ${OLDPWD}
-fi
-
-# Build the debian package
-VERSION=$(egrep -e '^Version' control | sed -re 's/^[^:]*: //')
-dpkg --build ${B} ./sshuttle-${VERSION}.deb
-rm -rf ${B}

packaging/prefixes.conf

@@ -1,5 +0,0 @@
-# Output prefixes here, one per line.  Prefix is in:
-# prefix/netmask format
-# Like this:
-# 192.168.0.0/16
-# 192.0.43.10/32

packaging/sshuttle.conf

@@ -1,90 +0,0 @@
-description "Create a transparent proxy over SSH"
-author      "Jim Wyllie <jwyllie83@gmail.com>"
-
-manual
-nice -5
-
-# Edit this file with network prefixes that should be loaded through the SSH
-# tunnel.
-env PREFIX_LOCATION=/etc/sshuttle/prefixes.conf
-
-# Routing table; defaults to 100
-env ROUTE_TABLE=100
-
-# fwmark; defaults to 1
-env FWMARK=1
-
-# SSH tunnel configuration file
-env SSHUTTLE_TUNNEL_FILE=/etc/sshuttle/tunnel.conf
-
-# File containing the tunnel proxy name / host / whatever
-env TUNNEL_PROXY="/etc/sshuttle/tunnel.conf"
-
-# Any other commands needed to run before or after loading the SSH tunnel.
-# This is where you can put any of your hacks to set up tunnels-in-tunnels,
-# etc.  Scripts in this directory are executed in order.
-env MISC_START_DIR=/etc/sshuttle/pre-start.d
-env MISC_STOP_DIR=/etc/sshuttle/post-stop.d
-
-start on (local-filesystems and net-device-up IFACE!=lo)
-stop on stopping network-services
-
-#respawn
-
-pre-start script
-	# Make sure we have created the routes
-	sudo ip rule add fwmark ${FWMARK} lookup ${ROUTE_TABLE}
-	logger "Starting sshuttle..."
-
-	if [ -f "${PREFIX_LOCATION}" ]; then
-		cat "${PREFIX_LOCATION}" | while read ROUTE; do
-
-			# Skip comments
-			if [ -n "$(echo ${ROUTE} | egrep "^[ 	]*#")" ]; then
-				continue
-			fi
-
-			# Skip empty lines
-			if [ -z "${ROUTE}" ]; then
-				continue
-			fi
-
-			logger "Adding route: ${ROUTE}"
-			ip route add local ${ROUTE} dev lo table ${ROUTE_TABLE}
-		done
-	fi
-
-	for RUNFILE in ${MISC_START_DIR}/*; do
-		logger "Executing ${RUNFILE}"
-		/bin/sh -c "${RUNFILE}"
-	done
-end script
-
-post-stop script
-	if [ -f "${PREFIX_LOCATION}" ]; then
-		cat "${PREFIX_LOCATION}" | while read ROUTE; do
-
-			# Skip comments
-			if [ -n "$(echo ${ROUTE} | egrep "^[ 	]*#")" ]; then
-				continue
-			fi
-
-			# Skip empty lines
-			if [ -z "${ROUTE}" ]; then
-				continue
-			fi
-
-			logger "Deleting route: ${ROUTE}"
-			ip route del local ${ROUTE} dev lo table ${ROUTE_TABLE}
-		done
-	fi
-
-	ip rule del fwmark ${FWMARK}
-
-	for RUNFILE in "${MISC_STOP_DIR}/*"; do
-		logger "Executing ${RUNFILE}"
-		/bin/sh -c "${RUNFILE}"
-	done
-end script
-
-exec /usr/bin/sshuttle --dns --method=tproxy --listen 0.0.0.0 --remote sshuttle_tunnel -s /etc/sshuttle/prefixes.conf -e "ssh -F ${TUNNEL_PROXY}"

packaging/tunnel.conf

@@ -1,19 +0,0 @@
-# Here is where you can specify any SSH tunnel options See ssh_config(5) for
-# details.  You need to leave the Host line intact, but everything else can
-# specify whatever you want
-Host sshuttle_tunnel
-
-# REQUIRED: Set this to be the host to which you would like to connect your
-# tunnel
-#Hostname localhost
-
-# REQUIRED: Set this to be the target SSH user on the remote system
-#User foo
-
-# ---------------------------------------------------------------------------
-# The rest are all optional; see ssh_config(5) for the full list of what can
-# be specified.  Some very commonly needed ones are below.
-# ---------------------------------------------------------------------------
-
-# SSH key used for connecting
-#IdentityFile /path/to/key

pyproject.toml

@@ -0,0 +1,57 @@
+[project]
+authors = [
+    {name = "Brian May", email = "brian@linuxpenguins.xyz"},
+]
+license = {text = "LGPL-2.1"}
+requires-python = "<4.0,>=3.9"
+dependencies = []
+name = "sshuttle"
+version = "1.3.1"
+description = "Transparent proxy server that works as a poor man's VPN. Forwards over ssh. Doesn't require admin. Works with Linux and MacOS. Supports DNS tunneling."
+readme = "README.rst"
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Intended Audience :: Developers",
+    "Intended Audience :: End Users/Desktop",
+    "License :: OSI Approved :: GNU Lesser General Public License v2 or later (LGPLv2+)",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Topic :: System :: Networking",
+]
+
+[project.scripts]
+sshuttle = "sshuttle.cmdline:main"
+
+[dependency-groups]
+dev = [
+    "pytest<9.0.0,>=8.0.1",
+    "pytest-cov<7.0,>=4.1",
+    "flake8<8.0.0,>=7.0.0",
+    "pyflakes<4.0.0,>=3.2.0",
+    "bump2version<2.0.0,>=1.0.1",
+    "twine<7,>=5",
+    "black>=25.1.0",
+    "jedi-language-server>=0.44.0",
+    "pylsp-mypy>=0.7.0",
+    "python-lsp-server>=1.12.2",
+    "ruff>=0.11.2",
+]
+docs = [
+    "sphinx==8.1.3; python_version ~= \"3.10\"",
+    "furo==2024.8.6",
+]
+
+[tool.uv]
+default-groups = []
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.sdist]
+exclude = [
+    "/.jj"
+]

run

@@ -0,0 +1,15 @@
+#!/usr/bin/env sh
+set -e
+export PYTHONPATH="$(dirname "$0"):$PYTHONPATH"
+export PATH="$(dirname "$0")/bin:$PATH"
+
+python_best_version() {
+  if [ -x "$(command -v python3)" ] &&
+      python3 -c "import sys; sys.exit(not sys.version_info > (3, 5))"; then
+    exec python3 "$@"
+  else
+    exec python "$@"
+  fi
+}
+
+python_best_version -m "sshuttle" "$@"

scripts/Containerfile

@@ -0,0 +1,39 @@
+# https://hub.docker.com/r/linuxserver/openssh-server/
+ARG BASE_IMAGE=docker.io/linuxserver/openssh-server:version-9.3_p2-r1
+
+FROM ${BASE_IMAGE} as pyenv
+
+# https://github.com/pyenv/pyenv/wiki#suggested-build-environment
+RUN apk add --no-cache build-base git libffi-dev openssl-dev bzip2-dev zlib-dev readline-dev sqlite-dev
+ENV PYENV_ROOT=/pyenv
+RUN curl https://raw.githubusercontent.com/pyenv/pyenv-installer/master/bin/pyenv-installer | bash
+RUN /pyenv/bin/pyenv install 3.10
+RUN /pyenv/bin/pyenv install 3.11
+RUN /pyenv/bin/pyenv install 3.12
+RUN bash -xc 'rm -rf /pyenv/{.git,plugins} /pyenv/versions/*/lib/*/{test,config,config-*linux-gnu}' && \
+    find /pyenv -type d -name __pycache__ -exec rm -rf {} + && \
+    find /pyenv -type f -name '*.py[co]' -delete
+
+FROM ${BASE_IMAGE}
+
+RUN apk add --no-cache bash nginx iperf3
+
+# pyenv setup
+ENV PYENV_ROOT=/pyenv
+ENV PATH=/pyenv/shims:/pyenv/bin:$PATH
+COPY --from=pyenv /pyenv /pyenv
+
+# OpenSSH Server variables
+ENV PUID=1000
+ENV PGID=1000
+ENV PASSWORD_ACCESS=true
+ENV USER_NAME=test
+ENV USER_PASSWORD=test
+ENV LOG_STDOUT=true
+
+# suppress linuxserver.io logo printing, chnage sshd config
+RUN sed -i '1 a exec &>/dev/null' /etc/s6-overlay/s6-rc.d/init-adduser/run
+
+# https://www.linuxserver.io/blog/2019-09-14-customizing-our-containers
+# To customize the container and start other components 
+COPY container.setup.sh /custom-cont-init.d/setup.sh

scripts/README.md

@@ -0,0 +1,21 @@
+# Container based test bed for sshuttle
+
+```bash
+test-bed up -d # start containers
+
+exec-sshuttle <node-id> [--copy-id] [--server-py=2.7|3.10] [--client-py=2.7|3.10] [--sshuttle-bin=/path/to/sshuttle] [sshuttle-args...]
+    # --copy-id  -> optionally do ssh-copy-id to make it passwordless for future runs
+    # --sshuttle-bin -> use another sshuttle binary instead of one from dev setup
+    # --server-py  -> Python version to use in server. (manged by pyenv)
+    # --client-py -> Python version to use in client (manged by pyenv)
+
+exec-sshuttle node-1 # start sshuttle to connect to node-1
+
+exec-tool curl node-1  # curl to nginx instance running on node1 via IP that is only reachable via sshuttle
+exec-tool iperf3 node-1 # measure throughput to node-1
+
+run-benchmark node-1 --client-py=3.10
+
+```
+
+<https://learn.microsoft.com/en-us/windows-server/administration/openssh/openssh_server_configuration#configuring-the-default-shell-for-openssh-in-windows>

scripts/compose.yml

@@ -0,0 +1,34 @@
+name: sshuttle-testbed
+
+services:
+  node-1:
+    image: ghcr.io/sshuttle/sshuttle-testbed
+    container_name: sshuttle-testbed-node-1
+    hostname: node-1
+    cap_add:
+      - "NET_ADMIN"
+    environment:
+      - ADD_IP_ADDRESSES=10.55.1.77/24
+    networks:
+      default:
+        ipv6_address: 2001:0DB8::551
+  node-2:
+    image: ghcr.io/sshuttle/sshuttle-testbed
+    container_name: sshuttle-testbed-node-2
+    hostname: node-2
+    cap_add:
+      - "NET_ADMIN"
+    environment:
+      - ADD_IP_ADDRESSES=10.55.2.77/32
+    networks:
+      default:
+        ipv6_address: 2001:0DB8::552
+
+networks:
+  default:
+    driver: bridge
+    enable_ipv6: true
+    ipam:
+       config:
+         - subnet: 2001:0DB8::/112
+    # internal: true

scripts/container.setup.sh

@@ -0,0 +1,65 @@
+#!/usr/bin/with-contenv bash
+# shellcheck shell=bash
+
+set -e
+
+function with_set_x() {
+    set -x
+    "$@"
+    {
+        ec=$?
+        set +x
+        return $ec
+    } 2>/dev/null
+}
+
+
+function log() {
+    echo "$*" >&2
+}
+
+log ">>> Setting up $(hostname) | id: $(id)\nIP:\n$(ip a)\nRoutes:\n$(ip r)\npyenv:\n$(pyenv versions)"
+
+echo "
+AcceptEnv PYENV_VERSION
+" >> /etc/ssh/sshd_config
+
+iface="$(ip route | awk '/default/ { print $5 }')"
+default_gw="$(ip route | awk '/default/ { print $3 }')"
+for addr in ${ADD_IP_ADDRESSES//,/ }; do
+    log ">>> Adding $addr to interface $iface"
+    net_addr=$(ipcalc -n "$addr" | awk -F= '{print $2}')
+    with_set_x ip addr add "$addr" dev "$iface"
+    with_set_x ip route add "$net_addr" via "$default_gw" dev "$iface" # so that sshuttle -N can discover routes
+done
+
+log ">>> Starting iperf3 server"
+iperf3 --server --port 5001 &
+
+mkdir -p /www
+echo "<h5>Hello from $(hostname)</h5>
+<pre>
+<u>ip address</u>
+$(ip address)
+<u>ip route</u>
+$(ip route)
+</pre>" >/www/index.html
+echo " 
+daemon off;
+worker_processes 1;
+error_log /dev/stdout info;
+events {
+    worker_connections 1024;
+}
+http {
+    include /etc/nginx/mime.types;
+    server {
+        access_log /dev/stdout;
+        listen 8080 default_server;
+        listen [::]:8080 default_server;
+        root /www;
+    }
+}" >/etc/nginx/nginx.conf
+
+log ">>> Starting nginx"
+nginx &

scripts/exec-sshuttle

@@ -0,0 +1,159 @@
+#!/usr/bin/env bash
+set -e
+
+ export MSYS_NO_PATHCONV=1
+ 
+function with_set_x() {
+    set -x
+    "$@"
+    {
+        ec=$?
+        set +x
+        return $ec
+    } 2>/dev/null
+}
+
+function log() {
+    echo "$*" >&2
+}
+
+ssh_cmd='ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null'
+ssh_copy_id=false
+args=()
+subnet_args=()
+while [[ $# -gt 0 ]]; do
+    arg=$1
+    shift
+    case "$arg" in
+    -v|-vv*)
+        ssh_cmd+=" -v"
+        args+=("$arg")
+        ;;
+    -r)
+        args+=("-r" "$1")
+        shift
+        ;;
+    --copy-id)
+        ssh_copy_id=true
+        ;;
+    --server-py=*)
+        server_pyenv_ver="${arg#*=}"
+        ;;
+    --client-py=*)
+        client_pyenv_ver="${arg#*=}"
+        ;;
+    -6)
+        ipv6_only=true
+        ;;
+    --sshuttle-bin=*)
+        sshuttle_bin="${arg#*=}"
+        ;;
+    -N|*/*)
+        subnet_args+=("$arg")
+    ;;
+    -*) 
+        args+=("$arg")
+    ;;
+    *)
+        if  [[ -z "$target" ]]; then
+            target=$arg
+        else
+            args+=("$arg")
+        fi
+        ;;
+    esac
+done
+if [[ ${#subnet_args[@]} -eq 0 ]]; then
+    subnet_args=("-N")
+fi
+
+if [[ $target == node-* ]]; then
+    log "Target is a a test-bed node"
+    port="2222"
+    user_part="test:test"
+    host=$("$(dirname "$0")/test-bed" get-ip "$target")
+    index=${target#node-}
+    if [[ $ipv6_only == true ]]; then
+        args+=("2001:0DB8::/112")
+    else
+        args+=("10.55.$index.0/24")
+    fi
+    target="$user_part@$host:$port"
+    if ! command -v sshpass >/dev/null; then
+        log "sshpass is not found. You might have to manually enter ssh password: 'test'"
+    fi
+    if [[ -z $server_pyenv_ver ]]; then
+        log "server-py argumwnt is not specified. Setting it to 3.8"
+        server_pyenv_ver="3.8"
+    fi
+fi
+
+if [[ -n $server_pyenv_ver ]]; then
+    log "Would pass PYENV_VERRSION=$server_pyenv_ver to server. pyenv is required on server to make it work"
+    pycmd="/pyenv/shims/python"
+    ssh_cmd+=" -o SetEnv=PYENV_VERSION=${server_pyenv_ver:-'3'}"
+    args=("--python=$pycmd" "${args[@]}")
+fi
+
+if [[ $ssh_copy_id == true ]]; then
+    log "Trying to make it passwordless"
+    if [[ $target == *@* ]]; then
+        user_part="${target%%@*}"
+        host_part="${target#*@}"
+    else
+        user_part="$(whoami)"
+        host_part="$target"
+    fi
+    if [[ $host_part == *:* ]]; then
+        host="${host_part%:*}"
+        port="${host_part#*:}"
+    else
+        host="$host_part"
+        port="22"
+    fi
+    if [[ $user_part == *:* ]]; then
+        user="${user_part%:*}"
+        password="${user_part#*:}"
+    else
+        user="$user_part"
+        password=""
+    fi
+    cmd=(ssh-copy-id -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -p "$port" "$user@$host")
+    if [[ -n $password  ]] && command -v sshpass >/dev/null; then
+        cmd=(sshpass -p "$password" "${cmd[@]}")
+    fi
+    with_set_x "${cmd[@]}"
+fi
+
+if [[ -z $sshuttle_bin || "$sshuttle_bin" == dev ]]; then
+    cd "$(dirname "$0")/.."
+    export PYTHONPATH="."
+    if [[ -n $client_pyenv_ver ]]; then
+        log "Using pyenv version: $client_pyenv_ver"
+        command -v pyenv &>/dev/null || log "You have to install pyenv to use --client-py" && exit 1
+        sshuttle_cmd=(/usr/bin/env PYENV_VERSION="$client_pyenv_ver" pyenv exec python -m sshuttle)
+    else
+        log "Using best python version availble"
+        if [ -x "$(command -v python3)" ] &&
+            python3 -c "import sys; sys.exit(not sys.version_info > (3, 5))"; then
+            sshuttle_cmd=(python3 -m sshuttle)
+        else
+            sshuttle_cmd=(python -m sshuttle)
+        fi
+    fi
+else
+    [[ -n $client_pyenv_ver ]] && log "Can't specify --client-py when --sshuttle-bin is specified" && exit 1
+    sshuttle_cmd=("$sshuttle_bin")
+fi
+
+if [[ " ${args[*]} " != *" --ssh-cmd "* ]]; then
+    args=("--ssh-cmd" "$ssh_cmd" "${args[@]}")
+fi
+
+if [[ " ${args[*]} " != *" -r "* ]]; then
+    args=("-r" "$target" "${args[@]}")
+fi
+
+set -x
+"${sshuttle_cmd[@]}" --version
+exec "${sshuttle_cmd[@]}" "${args[@]}" "${subnet_args[@]}"

scripts/exec-tool

@@ -0,0 +1,86 @@
+#!/usr/bin/env bash
+set -e
+
+
+function with_set_x() {
+    set -x
+    "$@"
+    {
+        ec=$?
+        set +x
+        return $ec
+    } 2>/dev/null
+}
+
+function log() {
+    echo "$*" >&2
+}
+
+
+args=()
+while [[ $# -gt 0 ]]; do
+    arg=$1
+    shift
+    case "$arg" in
+    -6)
+        ipv6_only=true
+        continue
+        ;;
+    -*) ;;
+    *)
+        if [[ -z $tool ]]; then
+            tool=$arg
+            continue
+        elif [[ -z $node ]]; then
+            node=$arg
+            continue
+        fi
+        ;;
+    esac
+    args+=("$arg")
+done
+
+tool=${tool?:"tool argument missing. should be one of iperf3,ping,curl,ab"}
+node=${node?:"node argument missing. should be 'node-1' , 'node-2' etc"}
+
+if [[ $node == node-* ]]; then
+    index=${node#node-}
+    if [[ $ipv6_only == true ]]; then
+        host="2001:0DB8::55$index"
+    else
+        host="10.55.$index.77"
+    fi
+else
+    host=$node
+fi
+
+connect_timeout_sec=3
+
+case "$tool" in
+ping)
+    with_set_x exec ping -W $connect_timeout_sec "${args[@]}" "$host"
+    ;;
+iperf3)
+    port=5001
+    with_set_x exec iperf3 --client "$host" --port=$port --connect-timeout=$((connect_timeout_sec * 1000)) "${args[@]}"
+    ;;
+curl)
+    port=8080
+    if [[ $host = *:* ]]; then
+        host="[$host]"
+        args+=(--ipv6)
+    fi
+    with_set_x exec curl "http://$host:$port/" -v --connect-timeout $connect_timeout_sec "${args[@]}"
+    ;;
+ab)
+    port=8080
+    if [[ " ${args[*]}" != *" -n "* && " ${args[*]}" != *" -c "* ]]; then
+        args+=(-n 500 -c 50 "${args[@]}")
+    fi
+    with_set_x exec ab -s $connect_timeout_sec "${args[@]}" "http://$host:$port/"
+    ;;
+*)
+    log "Unknown tool: $tool"
+    exit 2
+    ;;
+esac

scripts/run-benchmark

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+set -e
+cd "$(dirname "$0")"
+
+function with_set_x() {
+    set -x
+    "$@"
+    {
+        ec=$?
+        set +x
+        return $ec
+    } 2>/dev/null
+}
+
+function log() {
+    echo "$*" >&2
+}
+
+./test-bed up -d
+
+benchmark() {
+    log -e "\n======== Benchmarking sshuttle | Args: [$*]  ========"
+    local node=$1
+    shift
+    with_set_x ./exec-sshuttle "$node" --listen 55771 "$@" &
+    sshuttle_pid=$!
+    trap 'kill -0 $sshuttle_pid &>/dev/null && kill -15 $sshuttle_pid' EXIT
+    while ! nc -z localhost 55771; do sleep 0.1; done
+    sleep 1
+    ./exec-tool iperf3 "$node" --time=4
+    with_set_x kill -15 $sshuttle_pid
+    wait $sshuttle_pid || true
+}
+
+if [[ $# -gt 0 ]]; then
+    benchmark "${@}"
+else
+    benchmark node-1 --sshuttle-bin="${SSHUTTLE_BIN:-sshuttle}"
+    benchmark node-1 --sshuttle-bin=dev
+fi

scripts/run-checks

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -e
+cd "$(dirname "$0")/.."
+
+export PYTHONPATH=.
+
+set -x
+python -m flake8 sshuttle tests 
+python -m pytest .

scripts/test-bed

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+set -e
+cd "$(dirname "$0")"
+
+if [[ -z $1 || $1 = -* ]]; then
+    set -- up "$@"
+fi
+
+function with_set_x() {
+    set -x
+    "$@"
+    {
+        ec=$?
+        set +x
+        return $ec
+    } 2>/dev/null
+}
+
+function build() {
+    # podman build -t ghcr.io/sshuttle/sshuttle-testbed .
+    with_set_x docker build --progress=plain -t ghcr.io/sshuttle/sshuttle-testbed -f Containerfile .
+}
+
+function compose() {
+    # podman-compose "$@"
+    with_set_x docker compose "$@"
+}
+
+function get-ip() {
+    local container_name=sshuttle-testbed-"$1"
+    docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' "$container_name"
+}
+
+if [[ $1 == get-ip ]]; then
+    shift
+    get-ip "$@"
+else
+    if [[ $* = *--build* ]]; then
+        build
+    fi
+    compose "$@"
+fi

setup.cfg

@@ -0,0 +1,30 @@
+[bumpversion]
+current_version = 1.3.1
+
+[bumpversion:file:setup.py]
+
+[bumpversion:file:pyproject.toml]
+
+[bumpversion:file:sshuttle/version.py]
+
+[aliases]
+test = pytest
+
+[bdist_wheel]
+universal = 1
+
+[upload]
+sign = true
+identity = 0x1784577F811F6EAC
+
+[flake8]
+count = true
+show-source = true
+statistics = true
+max-line-length = 128
+
+[pycodestyle]
+max-line-length = 128
+
+[tool:pytest]
+addopts = --cov=sshuttle --cov-branch --cov-report=term-missing

src/Makefile

@@ -1,10 +0,0 @@
-all:
-
-Makefile:
-	@
-
-%: FORCE
-	+./do $@
-
-.PHONY: FORCE
-

src/all.do

@@ -1,11 +0,0 @@
-exec >&2
-UI=
-[ "$(uname)" = "Darwin" ] && UI=ui-macos/all
-redo-ifchange sshuttle.8 $UI
-
-echo
-echo "What now?"
-[ -z "$UI" ] || echo "- Try the MacOS GUI: open ui-macos/Sshuttle*.app"
-echo "- Run sshuttle: ./sshuttle --dns -r HOSTNAME 0/0"
-echo "- Read the README: less README.md"
-echo "- Read the man page: less sshuttle.md"

src/assembler.py

@@ -1,27 +0,0 @@
-import sys
-import zlib
-
-z = zlib.decompressobj()
-mainmod = sys.modules[__name__]
-while 1:
-    name = sys.stdin.readline().strip()
-    if name:
-        nbytes = int(sys.stdin.readline())
-        if verbosity >= 2:
-            sys.stderr.write('server: assembling %r (%d bytes)\n'
-                             % (name, nbytes))
-        content = z.decompress(sys.stdin.read(nbytes))
-        exec compile(content, name, "exec")
-
-        # FIXME: this crushes everything into a single module namespace,
-        # then makes each of the module names point at this one. Gross.
-        assert(name.endswith('.py'))
-        modname = name[:-3]
-        mainmod.__dict__[modname] = mainmod
-    else:
-        break
-
-verbose = verbosity
-sys.stderr.flush()
-sys.stdout.flush()
-main()

src/clean.do

@@ -1,2 +0,0 @@
-redo ui-macos/clean
-rm -f *~ */*~ .*~ */.*~ *.8 *.tmp */*.tmp *.pyc */*.pyc

src/client.py

@@ -1,754 +0,0 @@
-import struct
-import errno
-import re
-import signal
-import time
-import compat.ssubprocess as ssubprocess
-import helpers
-import os
-import ssnet
-import ssh
-import ssyslog
-import sys
-from ssnet import SockWrapper, Handler, Proxy, Mux, MuxWrapper
-from helpers import log, debug1, debug2, debug3, Fatal, islocal
-
-recvmsg = None
-try:
-    # try getting recvmsg from python
-    import socket as pythonsocket
-    getattr(pythonsocket.socket, "recvmsg")
-    socket = pythonsocket
-    recvmsg = "python"
-except AttributeError:
-    # try getting recvmsg from socket_ext library
-    try:
-        import socket_ext
-        getattr(socket_ext.socket, "recvmsg")
-        socket = socket_ext
-        recvmsg = "socket_ext"
-    except ImportError:
-        import socket
-
-_extra_fd = os.open('/dev/null', os.O_RDONLY)
-
-
-def got_signal(signum, frame):
-    log('exiting on signal %d\n' % signum)
-    sys.exit(1)
-
-
-_pidname = None
-IP_TRANSPARENT = 19
-IP_ORIGDSTADDR = 20
-IP_RECVORIGDSTADDR = IP_ORIGDSTADDR
-SOL_IPV6 = 41
-IPV6_ORIGDSTADDR = 74
-IPV6_RECVORIGDSTADDR = IPV6_ORIGDSTADDR
-
-
-if recvmsg == "python":
-    def recv_udp(listener, bufsize):
-        debug3('Accept UDP python using recvmsg.\n')
-        data, ancdata, msg_flags, srcip = listener.recvmsg(
-            4096, socket.CMSG_SPACE(24))
-        dstip = None
-        family = None
-        for cmsg_level, cmsg_type, cmsg_data in ancdata:
-            if cmsg_level == socket.SOL_IP and cmsg_type == IP_ORIGDSTADDR:
-                family, port = struct.unpack('=HH', cmsg_data[0:4])
-                port = socket.htons(port)
-                if family == socket.AF_INET:
-                    start = 4
-                    length = 4
-                else:
-                    raise Fatal("Unsupported socket type '%s'" % family)
-                ip = socket.inet_ntop(family, cmsg_data[start:start + length])
-                dstip = (ip, port)
-                break
-            elif cmsg_level == SOL_IPV6 and cmsg_type == IPV6_ORIGDSTADDR:
-                family, port = struct.unpack('=HH', cmsg_data[0:4])
-                port = socket.htons(port)
-                if family == socket.AF_INET6:
-                    start = 8
-                    length = 16
-                else:
-                    raise Fatal("Unsupported socket type '%s'" % family)
-                ip = socket.inet_ntop(family, cmsg_data[start:start + length])
-                dstip = (ip, port)
-                break
-        return (srcip, dstip, data)
-elif recvmsg == "socket_ext":
-    def recv_udp(listener, bufsize):
-        debug3('Accept UDP using socket_ext recvmsg.\n')
-        srcip, data, adata, flags = listener.recvmsg(
-            (bufsize,), socket.CMSG_SPACE(24))
-        dstip = None
-        family = None
-        for a in adata:
-            if a.cmsg_level == socket.SOL_IP and a.cmsg_type == IP_ORIGDSTADDR:
-                family, port = struct.unpack('=HH', a.cmsg_data[0:4])
-                port = socket.htons(port)
-                if family == socket.AF_INET:
-                    start = 4
-                    length = 4
-                else:
-                    raise Fatal("Unsupported socket type '%s'" % family)
-                ip = socket.inet_ntop(
-                    family, a.cmsg_data[start:start + length])
-                dstip = (ip, port)
-                break
-            elif a.cmsg_level == SOL_IPV6 and a.cmsg_type == IPV6_ORIGDSTADDR:
-                family, port = struct.unpack('=HH', a.cmsg_data[0:4])
-                port = socket.htons(port)
-                if family == socket.AF_INET6:
-                    start = 8
-                    length = 16
-                else:
-                    raise Fatal("Unsupported socket type '%s'" % family)
-                ip = socket.inet_ntop(
-                    family, a.cmsg_data[start:start + length])
-                dstip = (ip, port)
-                break
-        return (srcip, dstip, data[0])
-else:
-    def recv_udp(listener, bufsize):
-        debug3('Accept UDP using recvfrom.\n')
-        data, srcip = listener.recvfrom(bufsize)
-        return (srcip, None, data)
-
-
-def check_daemon(pidfile):
-    global _pidname
-    _pidname = os.path.abspath(pidfile)
-    try:
-        oldpid = open(_pidname).read(1024)
-    except IOError, e:
-        if e.errno == errno.ENOENT:
-            return  # no pidfile, ok
-        else:
-            raise Fatal("can't read %s: %s" % (_pidname, e))
-    if not oldpid:
-        os.unlink(_pidname)
-        return  # invalid pidfile, ok
-    oldpid = int(oldpid.strip() or 0)
-    if oldpid <= 0:
-        os.unlink(_pidname)
-        return  # invalid pidfile, ok
-    try:
-        os.kill(oldpid, 0)
-    except OSError, e:
-        if e.errno == errno.ESRCH:
-            os.unlink(_pidname)
-            return  # outdated pidfile, ok
-        elif e.errno == errno.EPERM:
-            pass
-        else:
-            raise
-    raise Fatal("%s: sshuttle is already running (pid=%d)"
-                % (_pidname, oldpid))
-
-
-def daemonize():
-    if os.fork():
-        os._exit(0)
-    os.setsid()
-    if os.fork():
-        os._exit(0)
-
-    outfd = os.open(_pidname, os.O_WRONLY | os.O_CREAT | os.O_EXCL, 0666)
-    try:
-        os.write(outfd, '%d\n' % os.getpid())
-    finally:
-        os.close(outfd)
-    os.chdir("/")
-
-    # Normal exit when killed, or try/finally won't work and the pidfile won't
-    # be deleted.
-    signal.signal(signal.SIGTERM, got_signal)
-
-    si = open('/dev/null', 'r+')
-    os.dup2(si.fileno(), 0)
-    os.dup2(si.fileno(), 1)
-    si.close()
-
-    ssyslog.stderr_to_syslog()
-
-
-def daemon_cleanup():
-    try:
-        os.unlink(_pidname)
-    except OSError, e:
-        if e.errno == errno.ENOENT:
-            pass
-        else:
-            raise
-
-
-def original_dst(sock):
-    try:
-        SO_ORIGINAL_DST = 80
-        SOCKADDR_MIN = 16
-        sockaddr_in = sock.getsockopt(socket.SOL_IP,
-                                      SO_ORIGINAL_DST, SOCKADDR_MIN)
-        (proto, port, a, b, c, d) = struct.unpack('!HHBBBB', sockaddr_in[:8])
-        assert(socket.htons(proto) == socket.AF_INET)
-        ip = '%d.%d.%d.%d' % (a, b, c, d)
-        return (ip, port)
-    except socket.error, e:
-        if e.args[0] == errno.ENOPROTOOPT:
-            return sock.getsockname()
-        raise
-
-
-class MultiListener:
-
-    def __init__(self, type=socket.SOCK_STREAM, proto=0):
-        self.v6 = socket.socket(socket.AF_INET6, type, proto)
-        self.v4 = socket.socket(socket.AF_INET, type, proto)
-
-    def setsockopt(self, level, optname, value):
-        if self.v6:
-            self.v6.setsockopt(level, optname, value)
-        if self.v4:
-            self.v4.setsockopt(level, optname, value)
-
-    def add_handler(self, handlers, callback, method, mux):
-        if self.v6:
-            handlers.append(
-                Handler(
-                    [self.v6],
-                    lambda: callback(self.v6, method, mux, handlers)))
-        if self.v4:
-            handlers.append(
-                Handler(
-                    [self.v4],
-                    lambda: callback(self.v4, method, mux, handlers)))
-
-    def listen(self, backlog):
-        if self.v6:
-            self.v6.listen(backlog)
-        if self.v4:
-            try:
-                self.v4.listen(backlog)
-            except socket.error, e:
-                # on some systems v4 bind will fail if the v6 suceeded,
-                # in this case the v6 socket will receive v4 too.
-                if e.errno == errno.EADDRINUSE and self.v6:
-                    self.v4 = None
-                else:
-                    raise e
-
-    def bind(self, address_v6, address_v4):
-        if address_v6 and self.v6:
-            self.v6.bind(address_v6)
-        else:
-            self.v6 = None
-        if address_v4 and self.v4:
-            self.v4.bind(address_v4)
-        else:
-            self.v4 = None
-
-    def print_listening(self, what):
-        if self.v6:
-            listenip = self.v6.getsockname()
-            debug1('%s listening on %r.\n' % (what, listenip))
-        if self.v4:
-            listenip = self.v4.getsockname()
-            debug1('%s listening on %r.\n' % (what, listenip))
-
-
-class FirewallClient:
-
-    def __init__(self, port_v6, port_v4, subnets_include, subnets_exclude,
-                 dnsport_v6, dnsport_v4, method, udp):
-        self.auto_nets = []
-        self.subnets_include = subnets_include
-        self.subnets_exclude = subnets_exclude
-        argvbase = ([sys.argv[1], sys.argv[0], sys.argv[1]] +
-                    ['-v'] * (helpers.verbose or 0) +
-                    ['--firewall', str(port_v6), str(port_v4),
-                     str(dnsport_v6), str(dnsport_v4),
-                     method, str(int(udp))])
-        if ssyslog._p:
-            argvbase += ['--syslog']
-        argv_tries = [
-            ['sudo', '-p', '[local sudo] Password: '] + argvbase,
-            ['su', '-c', ' '.join(argvbase)],
-            argvbase
-        ]
-
-        # we can't use stdin/stdout=subprocess.PIPE here, as we normally would,
-        # because stupid Linux 'su' requires that stdin be attached to a tty.
-        # Instead, attach a *bidirectional* socket to its stdout, and use
-        # that for talking in both directions.
-        (s1, s2) = socket.socketpair()
-
-        def setup():
-            # run in the child process
-            s2.close()
-        e = None
-        if os.getuid() == 0:
-            argv_tries = argv_tries[-1:]  # last entry only
-        for argv in argv_tries:
-            try:
-                if argv[0] == 'su':
-                    sys.stderr.write('[local su] ')
-                self.p = ssubprocess.Popen(argv, stdout=s1, preexec_fn=setup)
-                e = None
-                break
-            except OSError, e:
-                pass
-        self.argv = argv
-        s1.close()
-        self.pfile = s2.makefile('wb+')
-        if e:
-            log('Spawning firewall manager: %r\n' % self.argv)
-            raise Fatal(e)
-        line = self.pfile.readline()
-        self.check()
-        if line[0:5] != 'READY':
-            raise Fatal('%r expected READY, got %r' % (self.argv, line))
-        self.method = line[6:-1]
-
-    def check(self):
-        rv = self.p.poll()
-        if rv:
-            raise Fatal('%r returned %d' % (self.argv, rv))
-
-    def start(self):
-        self.pfile.write('ROUTES\n')
-        for (family, ip, width) in self.subnets_include + self.auto_nets:
-            self.pfile.write('%d,%d,0,%s\n' % (family, width, ip))
-        for (family, ip, width) in self.subnets_exclude:
-            self.pfile.write('%d,%d,1,%s\n' % (family, width, ip))
-        self.pfile.write('GO\n')
-        self.pfile.flush()
-        line = self.pfile.readline()
-        self.check()
-        if line != 'STARTED\n':
-            raise Fatal('%r expected STARTED, got %r' % (self.argv, line))
-
-    def sethostip(self, hostname, ip):
-        assert(not re.search(r'[^-\w]', hostname))
-        assert(not re.search(r'[^0-9.]', ip))
-        self.pfile.write('HOST %s,%s\n' % (hostname, ip))
-        self.pfile.flush()
-
-    def done(self):
-        self.pfile.close()
-        rv = self.p.wait()
-        if rv:
-            raise Fatal('cleanup: %r returned %d' % (self.argv, rv))
-
-
-dnsreqs = {}
-udp_by_src = {}
-
-
-def expire_connections(now, mux):
-    for chan, timeout in dnsreqs.items():
-        if timeout < now:
-            debug3('expiring dnsreqs channel=%d\n' % chan)
-            del mux.channels[chan]
-            del dnsreqs[chan]
-    debug3('Remaining DNS requests: %d\n' % len(dnsreqs))
-    for peer, (chan, timeout) in udp_by_src.items():
-        if timeout < now:
-            debug3('expiring UDP channel channel=%d peer=%r\n' % (chan, peer))
-            mux.send(chan, ssnet.CMD_UDP_CLOSE, '')
-            del mux.channels[chan]
-            del udp_by_src[peer]
-    debug3('Remaining UDP channels: %d\n' % len(udp_by_src))
-
-
-def onaccept_tcp(listener, method, mux, handlers):
-    global _extra_fd
-    try:
-        sock, srcip = listener.accept()
-    except socket.error, e:
-        if e.args[0] in [errno.EMFILE, errno.ENFILE]:
-            debug1('Rejected incoming connection: too many open files!\n')
-            # free up an fd so we can eat the connection
-            os.close(_extra_fd)
-            try:
-                sock, srcip = listener.accept()
-                sock.close()
-            finally:
-                _extra_fd = os.open('/dev/null', os.O_RDONLY)
-            return
-        else:
-            raise
-    if method == "tproxy":
-        dstip = sock.getsockname()
-    else:
-        dstip = original_dst(sock)
-    debug1('Accept TCP: %s:%r -> %s:%r.\n' % (srcip[0], srcip[1],
-                                              dstip[0], dstip[1]))
-    if dstip[1] == sock.getsockname()[1] and islocal(dstip[0], sock.family):
-        debug1("-- ignored: that's my address!\n")
-        sock.close()
-        return
-    chan = mux.next_channel()
-    if not chan:
-        log('warning: too many open channels.  Discarded connection.\n')
-        sock.close()
-        return
-    mux.send(chan, ssnet.CMD_TCP_CONNECT, '%d,%s,%s' %
-             (sock.family, dstip[0], dstip[1]))
-    outwrap = MuxWrapper(mux, chan)
-    handlers.append(Proxy(SockWrapper(sock, sock), outwrap))
-    expire_connections(time.time(), mux)
-
-
-def udp_done(chan, data, method, family, dstip):
-    (src, srcport, data) = data.split(",", 2)
-    srcip = (src, int(srcport))
-    debug3('doing send from %r to %r\n' % (srcip, dstip,))
-
-    try:
-        sender = socket.socket(family, socket.SOCK_DGRAM)
-        sender.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-        sender.setsockopt(socket.SOL_IP, IP_TRANSPARENT, 1)
-        sender.bind(srcip)
-        sender.sendto(data, dstip)
-        sender.close()
-    except socket.error, e:
-        debug1('-- ignored socket error sending UDP data: %r\n' % e)
-
-
-def onaccept_udp(listener, method, mux, handlers):
-    now = time.time()
-    srcip, dstip, data = recv_udp(listener, 4096)
-    if not dstip:
-        debug1(
-            "-- ignored UDP from %r: "
-            "couldn't determine destination IP address\n" % (srcip,))
-        return
-    debug1('Accept UDP: %r -> %r.\n' % (srcip, dstip,))
-    if srcip in udp_by_src:
-        chan, timeout = udp_by_src[srcip]
-    else:
-        chan = mux.next_channel()
-        mux.channels[chan] = lambda cmd, data: udp_done(
-            chan, data, method, listener.family, dstip=srcip)
-        mux.send(chan, ssnet.CMD_UDP_OPEN, listener.family)
-    udp_by_src[srcip] = chan, now + 30
-
-    hdr = "%s,%r," % (dstip[0], dstip[1])
-    mux.send(chan, ssnet.CMD_UDP_DATA, hdr + data)
-
-    expire_connections(now, mux)
-
-
-def dns_done(chan, data, method, sock, srcip, dstip, mux):
-    debug3('dns_done: channel=%d src=%r dst=%r\n' % (chan, srcip, dstip))
-    del mux.channels[chan]
-    del dnsreqs[chan]
-    if method == "tproxy":
-        debug3('doing send from %r to %r\n' % (srcip, dstip,))
-        sender = socket.socket(sock.family, socket.SOCK_DGRAM)
-        sender.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-        sender.setsockopt(socket.SOL_IP, IP_TRANSPARENT, 1)
-        sender.bind(srcip)
-        sender.sendto(data, dstip)
-        sender.close()
-    else:
-        debug3('doing sendto %r\n' % (dstip,))
-        sock.sendto(data, dstip)
-
-
-def ondns(listener, method, mux, handlers):
-    now = time.time()
-    srcip, dstip, data = recv_udp(listener, 4096)
-    if method == "tproxy" and not dstip:
-        debug1(
-            "-- ignored UDP from %r: "
-            "couldn't determine destination IP address\n" % (srcip,))
-        return
-    debug1('DNS request from %r to %r: %d bytes\n' % (srcip, dstip, len(data)))
-    chan = mux.next_channel()
-    dnsreqs[chan] = now + 30
-    mux.send(chan, ssnet.CMD_DNS_REQ, data)
-    mux.channels[chan] = lambda cmd, data: dns_done(
-        chan, data, method, listener, srcip=dstip, dstip=srcip, mux=mux)
-    expire_connections(now, mux)
-
-
-def _main(tcp_listener, udp_listener, fw, ssh_cmd, remotename,
-          python, latency_control,
-          dns_listener, method, seed_hosts, auto_nets,
-          syslog, daemon):
-    handlers = []
-    if helpers.verbose >= 1:
-        helpers.logprefix = 'c : '
-    else:
-        helpers.logprefix = 'client: '
-    debug1('connecting to server...\n')
-
-    try:
-        (serverproc, serversock) = ssh.connect(
-            ssh_cmd, remotename, python,
-            stderr=ssyslog._p and ssyslog._p.stdin,
-            options=dict(latency_control=latency_control, method=method))
-    except socket.error, e:
-        if e.args[0] == errno.EPIPE:
-            raise Fatal("failed to establish ssh session (1)")
-        else:
-            raise
-    mux = Mux(serversock, serversock)
-    handlers.append(mux)
-
-    expected = 'SSHUTTLE0001'
-
-    try:
-        v = 'x'
-        while v and v != '\0':
-            v = serversock.recv(1)
-        v = 'x'
-        while v and v != '\0':
-            v = serversock.recv(1)
-        initstring = serversock.recv(len(expected))
-    except socket.error, e:
-        if e.args[0] == errno.ECONNRESET:
-            raise Fatal("failed to establish ssh session (2)")
-        else:
-            raise
-
-    rv = serverproc.poll()
-    if rv:
-        raise Fatal('server died with error code %d' % rv)
-
-    if initstring != expected:
-        raise Fatal('expected server init string %r; got %r'
-                    % (expected, initstring))
-    debug1('connected.\n')
-    print 'Connected.'
-    sys.stdout.flush()
-    if daemon:
-        daemonize()
-        log('daemonizing (%s).\n' % _pidname)
-    elif syslog:
-        debug1('switching to syslog.\n')
-        ssyslog.stderr_to_syslog()
-
-    def onroutes(routestr):
-        if auto_nets:
-            for line in routestr.strip().split('\n'):
-                (family, ip, width) = line.split(',', 2)
-                fw.auto_nets.append((family, ip, int(width)))
-
-        # we definitely want to do this *after* starting ssh, or we might end
-        # up intercepting the ssh connection!
-        #
-        # Moreover, now that we have the --auto-nets option, we have to wait
-        # for the server to send us that message anyway.  Even if we haven't
-        # set --auto-nets, we might as well wait for the message first, then
-        # ignore its contents.
-        mux.got_routes = None
-        fw.start()
-    mux.got_routes = onroutes
-
-    def onhostlist(hostlist):
-        debug2('got host list: %r\n' % hostlist)
-        for line in hostlist.strip().split():
-            if line:
-                name, ip = line.split(',', 1)
-                fw.sethostip(name, ip)
-    mux.got_host_list = onhostlist
-
-    tcp_listener.add_handler(handlers, onaccept_tcp, method, mux)
-
-    if udp_listener:
-        udp_listener.add_handler(handlers, onaccept_udp, method, mux)
-
-    if dns_listener:
-        dns_listener.add_handler(handlers, ondns, method, mux)
-
-    if seed_hosts is not None:
-        debug1('seed_hosts: %r\n' % seed_hosts)
-        mux.send(0, ssnet.CMD_HOST_REQ, '\n'.join(seed_hosts))
-
-    while 1:
-        rv = serverproc.poll()
-        if rv:
-            raise Fatal('server died with error code %d' % rv)
-
-        ssnet.runonce(handlers, mux)
-        if latency_control:
-            mux.check_fullness()
-        mux.callback()
-
-
-def main(listenip_v6, listenip_v4,
-         ssh_cmd, remotename, python, latency_control, dns,
-         method, seed_hosts, auto_nets,
-         subnets_include, subnets_exclude, syslog, daemon, pidfile):
-
-    if syslog:
-        ssyslog.start_syslog()
-    if daemon:
-        try:
-            check_daemon(pidfile)
-        except Fatal, e:
-            log("%s\n" % e)
-            return 5
-    debug1('Starting sshuttle proxy.\n')
-
-    if recvmsg is not None:
-        debug1("recvmsg %s support enabled.\n" % recvmsg)
-
-    if method == "tproxy":
-        if recvmsg is not None:
-            debug1("tproxy UDP support enabled.\n")
-            udp = True
-        else:
-            debug1("tproxy UDP support requires recvmsg function.\n")
-            udp = False
-        if dns and recvmsg is None:
-            debug1("tproxy DNS support requires recvmsg function.\n")
-            dns = False
-    else:
-        debug1("UDP support requires tproxy; disabling UDP.\n")
-        udp = False
-
-    if listenip_v6 and listenip_v6[1] and listenip_v4 and listenip_v4[1]:
-        # if both ports given, no need to search for a spare port
-        ports = [0, ]
-    else:
-        # if at least one port missing, we have to search
-        ports = xrange(12300, 9000, -1)
-
-    # search for free ports and try to bind
-    last_e = None
-    redirectport_v6 = 0
-    redirectport_v4 = 0
-    bound = False
-    debug2('Binding redirector:')
-    for port in ports:
-        debug2(' %d' % port)
-        tcp_listener = MultiListener()
-        tcp_listener.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-
-        if udp:
-            udp_listener = MultiListener(socket.SOCK_DGRAM)
-            udp_listener.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-        else:
-            udp_listener = None
-
-        if listenip_v6 and listenip_v6[1]:
-            lv6 = listenip_v6
-            redirectport_v6 = lv6[1]
-        elif listenip_v6:
-            lv6 = (listenip_v6[0], port)
-            redirectport_v6 = port
-        else:
-            lv6 = None
-            redirectport_v6 = 0
-
-        if listenip_v4 and listenip_v4[1]:
-            lv4 = listenip_v4
-            redirectport_v4 = lv4[1]
-        elif listenip_v4:
-            lv4 = (listenip_v4[0], port)
-            redirectport_v4 = port
-        else:
-            lv4 = None
-            redirectport_v4 = 0
-
-        try:
-            tcp_listener.bind(lv6, lv4)
-            if udp_listener:
-                udp_listener.bind(lv6, lv4)
-            bound = True
-            break
-        except socket.error, e:
-            if e.errno == errno.EADDRINUSE:
-                last_e = e
-            else:
-                raise e
-    debug2('\n')
-    if not bound:
-        assert(last_e)
-        raise last_e
-    tcp_listener.listen(10)
-    tcp_listener.print_listening("TCP redirector")
-    if udp_listener:
-        udp_listener.print_listening("UDP redirector")
-
-    bound = False
-    if dns:
-        # search for spare port for DNS
-        debug2('Binding DNS:')
-        ports = xrange(12300, 9000, -1)
-        for port in ports:
-            debug2(' %d' % port)
-            dns_listener = MultiListener(socket.SOCK_DGRAM)
-
-            if listenip_v6:
-                lv6 = (listenip_v6[0], port)
-                dnsport_v6 = port
-            else:
-                lv6 = None
-                dnsport_v6 = 0
-
-            if listenip_v4:
-                lv4 = (listenip_v4[0], port)
-                dnsport_v4 = port
-            else:
-                lv4 = None
-                dnsport_v4 = 0
-
-            try:
-                dns_listener.bind(lv6, lv4)
-                bound = True
-                break
-            except socket.error, e:
-                if e.errno == errno.EADDRINUSE:
-                    last_e = e
-                else:
-                    raise e
-        debug2('\n')
-        dns_listener.print_listening("DNS")
-        if not bound:
-            assert(last_e)
-            raise last_e
-    else:
-        dnsport_v6 = 0
-        dnsport_v4 = 0
-        dns_listener = None
-
-    fw = FirewallClient(redirectport_v6, redirectport_v4, subnets_include,
-                        subnets_exclude, dnsport_v6, dnsport_v4, method, udp)
-
-    if fw.method == "tproxy":
-        tcp_listener.setsockopt(socket.SOL_IP, IP_TRANSPARENT, 1)
-        if udp_listener:
-            udp_listener.setsockopt(socket.SOL_IP, IP_TRANSPARENT, 1)
-            if udp_listener.v4 is not None:
-                udp_listener.v4.setsockopt(
-                    socket.SOL_IP, IP_RECVORIGDSTADDR, 1)
-            if udp_listener.v6 is not None:
-                udp_listener.v6.setsockopt(SOL_IPV6, IPV6_RECVORIGDSTADDR, 1)
-        if dns_listener:
-            dns_listener.setsockopt(socket.SOL_IP, IP_TRANSPARENT, 1)
-            if dns_listener.v4 is not None:
-                dns_listener.v4.setsockopt(
-                    socket.SOL_IP, IP_RECVORIGDSTADDR, 1)
-            if dns_listener.v6 is not None:
-                dns_listener.v6.setsockopt(SOL_IPV6, IPV6_RECVORIGDSTADDR, 1)
-
-    try:
-        return _main(tcp_listener, udp_listener, fw, ssh_cmd, remotename,
-                     python, latency_control, dns_listener,
-                     fw.method, seed_hosts, auto_nets, syslog,
-                     daemon)
-    finally:
-        try:
-            if daemon:
-                # it's not our child anymore; can't waitpid
-                fw.p.returncode = 0
-            fw.done()
-        finally:
-            if daemon:
-                daemon_cleanup()

src/default.8.do

@@ -1,7 +0,0 @@
-exec >&2
-if pandoc </dev/null 2>/dev/null; then
-	pandoc -s -r markdown -w man -o $3 $2.md
-else
-	echo "Warning: pandoc not installed; can't generate manpages."
-	redo-always
-fi

src/do

@@ -1,175 +0,0 @@
-#!/bin/sh
-#
-# A minimal alternative to djb redo that doesn't support incremental builds.
-# For the full version, visit http://github.com/apenwarr/redo
-#
-# The author disclaims copyright to this source file and hereby places it in
-# the public domain. (2010 12 14)
-#
-
-# By default, no output coloring.
-green=""
-bold=""
-plain=""
-
-if [ -n "$TERM" -a "$TERM" != "dumb" ] && tty <&2 >/dev/null 2>&1; then
-	green="$(printf '\033[32m')"
-	bold="$(printf '\033[1m')"
-	plain="$(printf '\033[m')"
-fi
-
-_dirsplit()
-{
-	base=${1##*/}
-	dir=${1%$base}
-}
-
-dirname()
-(
-	_dirsplit "$1"
-	dir=${dir%/}
-	echo "${dir:-.}"
-)
-
-_dirsplit "$0"
-export REDO=$(cd "${dir:-.}" && echo "$PWD/$base")
-
-DO_TOP=
-if [ -z "$DO_BUILT" ]; then
-	DO_TOP=1
-	[ -n "$*" ] || set all  # only toplevel redo has a default target
-	export DO_BUILT=$PWD/.do_built
-	: >>"$DO_BUILT"
-	echo "Removing previously built files..." >&2
-	sort -u "$DO_BUILT" | tee "$DO_BUILT.new" |
-	while read f; do printf "%s\0%s.did\0" "$f" "$f"; done |
-	xargs -0 rm -f 2>/dev/null
-	mv "$DO_BUILT.new" "$DO_BUILT"
-	DO_PATH=$DO_BUILT.dir
-	export PATH=$DO_PATH:$PATH
-	rm -rf "$DO_PATH"
-	mkdir "$DO_PATH"
-	for d in redo redo-ifchange; do
-		ln -s "$REDO" "$DO_PATH/$d";
-	done
-	[ -e /bin/true ] && TRUE=/bin/true || TRUE=/usr/bin/true
-	for d in redo-ifcreate redo-stamp redo-always; do 
-		ln -s $TRUE "$DO_PATH/$d";
-	done
-fi
-
-
-_find_dofile_pwd()
-{
-	dofile=default.$1.do
-	while :; do
-		dofile=default.${dofile#default.*.}
-		[ -e "$dofile" -o "$dofile" = default.do ] && break
-	done
-	ext=${dofile#default}
-	ext=${ext%.do}
-	base=${1%$ext}
-}
-
-
-_find_dofile()
-{
-	local prefix=
-	while :; do
-		_find_dofile_pwd "$1"
-		[ -e "$dofile" ] && break
-		[ "$PWD" = "/" ] && break
-		target=${PWD##*/}/$target
-		tmp=${PWD##*/}/$tmp
-		prefix=${PWD##*/}/$prefix
-		cd ..
-	done
-	base=$prefix$base
-}
-
-
-_run_dofile()
-{
-	export DO_DEPTH="$DO_DEPTH  "
-	export REDO_TARGET=$PWD/$target
-	local line1
-	set -e
-	read line1 <"$PWD/$dofile"
-	cmd=${line1#"#!/"}
-	if [ "$cmd" != "$line1" ]; then
-		/$cmd "$PWD/$dofile" "$@" >"$tmp.tmp2"
-	else
-		:; . "$PWD/$dofile" >"$tmp.tmp2"
-	fi
-}
-
-
-_do()
-{
-	local dir=$1 target=$2 tmp=$3
-	if [ ! -e "$target" ] || [ -d "$target" -a ! -e "$target.did" ]; then
-		printf '%sdo  %s%s%s%s\n' \
-			"$green" "$DO_DEPTH" "$bold" "$dir$target" "$plain" >&2
-		echo "$PWD/$target" >>"$DO_BUILT"
-		dofile=$target.do
-		base=$target
-		ext=
-		[ -e "$target.do" ] || _find_dofile "$target"
-		if [ ! -e "$dofile" ]; then
-			echo "do: $target: no .do file" >&2
-			return 1
-		fi
-		[ ! -e "$DO_BUILT" ] || [ ! -d "$(dirname "$target")" ] ||
-		: >>"$target.did"
-		( _run_dofile "$target" "$base" "$tmp.tmp" )
-		rv=$?
-		if [ $rv != 0 ]; then
-			printf "do: %s%s\n" "$DO_DEPTH" \
-				"$dir$target: got exit code $rv" >&2
-			rm -f "$tmp.tmp" "$tmp.tmp2"
-			return $rv
-		fi
-		mv "$tmp.tmp" "$target" 2>/dev/null ||
-		! test -s "$tmp.tmp2" ||
-		mv "$tmp.tmp2" "$target" 2>/dev/null
-		rm -f "$tmp.tmp2"
-	else
-		echo "do  $DO_DEPTH$target exists." >&2
-	fi
-}
-
-
-# Make corrections for directories that don't actually exist yet.
-_dir_shovel()
-{
-	local dir base
-	xdir=$1 xbase=$2 xbasetmp=$2
-	while [ ! -d "$xdir" -a -n "$xdir" ]; do
-		_dirsplit "${xdir%/}"
-		xbasetmp=${base}__$xbase
-		xdir=$dir xbase=$base/$xbase
-		echo "xbasetmp='$xbasetmp'" >&2
-	done
-}
-
-
-redo()
-{
-	for i in "$@"; do
-		_dirsplit "$i"
-		_dir_shovel "$dir" "$base"
-		dir=$xdir base=$xbase basetmp=$xbasetmp
-		( cd "$dir" && _do "$dir" "$base" "$basetmp" ) || return 1
-	done
-}
-
-
-set -e
-redo "$@"
-
-if [ -n "$DO_TOP" ]; then
-	echo "Removing stamp files..." >&2
-	[ ! -e "$DO_BUILT" ] ||
-	while read f; do printf "%s.did\0" "$f"; done <"$DO_BUILT" |
-	xargs -0 rm -f 2>/dev/null
-fi

src/firewall.py

@@ -1,653 +0,0 @@
-import errno
-import socket
-import select
-import signal
-import struct
-import compat.ssubprocess as ssubprocess
-import ssyslog
-import sys
-import os
-from helpers import log, debug1, debug3, islocal, Fatal, family_to_string, \
-    resolvconf_nameservers
-
-# python doesn't have a definition for this
-IPPROTO_DIVERT = 254
-
-
-def nonfatal(func, *args):
-    try:
-        func(*args)
-    except Fatal, e:
-        log('error: %s\n' % e)
-
-
-def ipt_chain_exists(family, table, name):
-    if family == socket.AF_INET6:
-        cmd = 'ip6tables'
-    elif family == socket.AF_INET:
-        cmd = 'iptables'
-    else:
-        raise Exception('Unsupported family "%s"' % family_to_string(family))
-    argv = [cmd, '-t', table, '-nL']
-    p = ssubprocess.Popen(argv, stdout=ssubprocess.PIPE)
-    for line in p.stdout:
-        if line.startswith('Chain %s ' % name):
-            return True
-    rv = p.wait()
-    if rv:
-        raise Fatal('%r returned %d' % (argv, rv))
-
-
-def _ipt(family, table, *args):
-    if family == socket.AF_INET6:
-        argv = ['ip6tables', '-t', table] + list(args)
-    elif family == socket.AF_INET:
-        argv = ['iptables', '-t', table] + list(args)
-    else:
-        raise Exception('Unsupported family "%s"' % family_to_string(family))
-    debug1('>> %s\n' % ' '.join(argv))
-    rv = ssubprocess.call(argv)
-    if rv:
-        raise Fatal('%r returned %d' % (argv, rv))
-
-
-_no_ttl_module = False
-
-
-def _ipt_ttl(family, *args):
-    global _no_ttl_module
-    if not _no_ttl_module:
-        # we avoid infinite loops by generating server-side connections
-        # with ttl 42.  This makes the client side not recapture those
-        # connections, in case client == server.
-        try:
-            argsplus = list(args) + ['-m', 'ttl', '!', '--ttl', '42']
-            _ipt(family, *argsplus)
-        except Fatal:
-            _ipt(family, *args)
-            # we only get here if the non-ttl attempt succeeds
-            log('sshuttle: warning: your iptables is missing '
-                'the ttl module.\n')
-            _no_ttl_module = True
-    else:
-        _ipt(family, *args)
-
-
-# We name the chain based on the transproxy port number so that it's possible
-# to run multiple copies of sshuttle at the same time.  Of course, the
-# multiple copies shouldn't have overlapping subnets, or only the most-
-# recently-started one will win (because we use "-I OUTPUT 1" instead of
-# "-A OUTPUT").
-def do_iptables_nat(port, dnsport, family, subnets, udp):
-    # only ipv4 supported with NAT
-    if family != socket.AF_INET:
-        raise Exception(
-            'Address family "%s" unsupported by nat method'
-            % family_to_string(family))
-    if udp:
-        raise Exception("UDP not supported by nat method")
-
-    table = "nat"
-
-    def ipt(*args):
-        return _ipt(family, table, *args)
-
-    def ipt_ttl(*args):
-        return _ipt_ttl(family, table, *args)
-
-    chain = 'sshuttle-%s' % port
-
-    # basic cleanup/setup of chains
-    if ipt_chain_exists(family, table, chain):
-        nonfatal(ipt, '-D', 'OUTPUT', '-j', chain)
-        nonfatal(ipt, '-D', 'PREROUTING', '-j', chain)
-        nonfatal(ipt, '-F', chain)
-        ipt('-X', chain)
-
-    if subnets or dnsport:
-        ipt('-N', chain)
-        ipt('-F', chain)
-        ipt('-I', 'OUTPUT', '1', '-j', chain)
-        ipt('-I', 'PREROUTING', '1', '-j', chain)
-
-    if subnets:
-        # create new subnet entries.  Note that we're sorting in a very
-        # particular order: we need to go from most-specific (largest swidth)
-        # to least-specific, and at any given level of specificity, we want
-        # excludes to come first.  That's why the columns are in such a non-
-        # intuitive order.
-        for f, swidth, sexclude, snet \
-                in sorted(subnets, key=lambda s: s[1], reverse=True):
-            if sexclude:
-                ipt('-A', chain, '-j', 'RETURN',
-                    '--dest', '%s/%s' % (snet, swidth),
-                    '-p', 'tcp')
-            else:
-                ipt_ttl('-A', chain, '-j', 'REDIRECT',
-                        '--dest', '%s/%s' % (snet, swidth),
-                        '-p', 'tcp',
-                        '--to-ports', str(port))
-
-    if dnsport:
-        nslist = resolvconf_nameservers()
-        for f, ip in filter(lambda i: i[0] == family, nslist):
-            ipt_ttl('-A', chain, '-j', 'REDIRECT',
-                    '--dest', '%s/32' % ip,
-                    '-p', 'udp',
-                    '--dport', '53',
-                    '--to-ports', str(dnsport))
-
-
-def do_iptables_tproxy(port, dnsport, family, subnets, udp):
-    if family not in [socket.AF_INET, socket.AF_INET6]:
-        raise Exception(
-            'Address family "%s" unsupported by tproxy method'
-            % family_to_string(family))
-
-    table = "mangle"
-
-    def ipt(*args):
-        return _ipt(family, table, *args)
-
-    def ipt_ttl(*args):
-        return _ipt_ttl(family, table, *args)
-
-    mark_chain = 'sshuttle-m-%s' % port
-    tproxy_chain = 'sshuttle-t-%s' % port
-    divert_chain = 'sshuttle-d-%s' % port
-
-    # basic cleanup/setup of chains
-    if ipt_chain_exists(family, table, mark_chain):
-        ipt('-D', 'OUTPUT', '-j', mark_chain)
-        ipt('-F', mark_chain)
-        ipt('-X', mark_chain)
-
-    if ipt_chain_exists(family, table, tproxy_chain):
-        ipt('-D', 'PREROUTING', '-j', tproxy_chain)
-        ipt('-F', tproxy_chain)
-        ipt('-X', tproxy_chain)
-
-    if ipt_chain_exists(family, table, divert_chain):
-        ipt('-F', divert_chain)
-        ipt('-X', divert_chain)
-
-    if subnets or dnsport:
-        ipt('-N', mark_chain)
-        ipt('-F', mark_chain)
-        ipt('-N', divert_chain)
-        ipt('-F', divert_chain)
-        ipt('-N', tproxy_chain)
-        ipt('-F', tproxy_chain)
-        ipt('-I', 'OUTPUT', '1', '-j', mark_chain)
-        ipt('-I', 'PREROUTING', '1', '-j', tproxy_chain)
-        ipt('-A', divert_chain, '-j', 'MARK', '--set-mark', '1')
-        ipt('-A', divert_chain, '-j', 'ACCEPT')
-        ipt('-A', tproxy_chain, '-m', 'socket', '-j', divert_chain,
-            '-m', 'tcp', '-p', 'tcp')
-    if subnets and udp:
-        ipt('-A', tproxy_chain, '-m', 'socket', '-j', divert_chain,
-            '-m', 'udp', '-p', 'udp')
-
-    if dnsport:
-        nslist = resolvconf_nameservers()
-        for f, ip in filter(lambda i: i[0] == family, nslist):
-            ipt('-A', mark_chain, '-j', 'MARK', '--set-mark', '1',
-                '--dest', '%s/32' % ip,
-                '-m', 'udp', '-p', 'udp', '--dport', '53')
-            ipt('-A', tproxy_chain, '-j', 'TPROXY', '--tproxy-mark', '0x1/0x1',
-                '--dest', '%s/32' % ip,
-                '-m', 'udp', '-p', 'udp', '--dport', '53',
-                '--on-port', str(dnsport))
-
-    if subnets:
-        for f, swidth, sexclude, snet \
-                in sorted(subnets, key=lambda s: s[1], reverse=True):
-            if sexclude:
-                ipt('-A', mark_chain, '-j', 'RETURN',
-                    '--dest', '%s/%s' % (snet, swidth),
-                    '-m', 'tcp', '-p', 'tcp')
-                ipt('-A', tproxy_chain, '-j', 'RETURN',
-                    '--dest', '%s/%s' % (snet, swidth),
-                    '-m', 'tcp', '-p', 'tcp')
-            else:
-                ipt('-A', mark_chain, '-j', 'MARK',
-                    '--set-mark', '1',
-                    '--dest', '%s/%s' % (snet, swidth),
-                    '-m', 'tcp', '-p', 'tcp')
-                ipt('-A', tproxy_chain, '-j', 'TPROXY',
-                    '--tproxy-mark', '0x1/0x1',
-                    '--dest', '%s/%s' % (snet, swidth),
-                    '-m', 'tcp', '-p', 'tcp',
-                    '--on-port', str(port))
-
-            if sexclude and udp:
-                ipt('-A', mark_chain, '-j', 'RETURN',
-                    '--dest', '%s/%s' % (snet, swidth),
-                    '-m', 'udp', '-p', 'udp')
-                ipt('-A', tproxy_chain, '-j', 'RETURN',
-                    '--dest', '%s/%s' % (snet, swidth),
-                    '-m', 'udp', '-p', 'udp')
-            elif udp:
-                ipt('-A', mark_chain, '-j', 'MARK',
-                    '--set-mark', '1',
-                    '--dest', '%s/%s' % (snet, swidth),
-                    '-m', 'udp', '-p', 'udp')
-                ipt('-A', tproxy_chain, '-j', 'TPROXY',
-                    '--tproxy-mark', '0x1/0x1',
-                    '--dest', '%s/%s' % (snet, swidth),
-                    '-m', 'udp', '-p', 'udp',
-                    '--on-port', str(port))
-
-
-def ipfw_rule_exists(n):
-    argv = ['ipfw', 'list']
-    p = ssubprocess.Popen(argv, stdout=ssubprocess.PIPE)
-    found = False
-    for line in p.stdout:
-        if line.startswith('%05d ' % n):
-            if not ('ipttl 42' in line
-                    or ('skipto %d' % (n + 1)) in line
-                    or 'check-state' in line):
-                log('non-sshuttle ipfw rule: %r\n' % line.strip())
-                raise Fatal('non-sshuttle ipfw rule #%d already exists!' % n)
-            found = True
-    rv = p.wait()
-    if rv:
-        raise Fatal('%r returned %d' % (argv, rv))
-    return found
-
-
-_oldctls = {}
-
-
-def _fill_oldctls(prefix):
-    argv = ['sysctl', prefix]
-    p = ssubprocess.Popen(argv, stdout=ssubprocess.PIPE)
-    for line in p.stdout:
-        assert(line[-1] == '\n')
-        (k, v) = line[:-1].split(': ', 1)
-        _oldctls[k] = v
-    rv = p.wait()
-    if rv:
-        raise Fatal('%r returned %d' % (argv, rv))
-    if not line:
-        raise Fatal('%r returned no data' % (argv,))
-
-
-def _sysctl_set(name, val):
-    argv = ['sysctl', '-w', '%s=%s' % (name, val)]
-    debug1('>> %s\n' % ' '.join(argv))
-    return ssubprocess.call(argv, stdout=open('/dev/null', 'w'))
-
-
-_changedctls = []
-
-
-def sysctl_set(name, val, permanent=False):
-    PREFIX = 'net.inet.ip'
-    assert(name.startswith(PREFIX + '.'))
-    val = str(val)
-    if not _oldctls:
-        _fill_oldctls(PREFIX)
-    if not (name in _oldctls):
-        debug1('>> No such sysctl: %r\n' % name)
-        return False
-    oldval = _oldctls[name]
-    if val != oldval:
-        rv = _sysctl_set(name, val)
-        if rv == 0 and permanent:
-            debug1('>>   ...saving permanently in /etc/sysctl.conf\n')
-            f = open('/etc/sysctl.conf', 'a')
-            f.write('\n'
-                    '# Added by sshuttle\n'
-                    '%s=%s\n' % (name, val))
-            f.close()
-        else:
-            _changedctls.append(name)
-        return True
-
-
-def _udp_unpack(p):
-    src = (socket.inet_ntoa(p[12:16]), struct.unpack('!H', p[20:22])[0])
-    dst = (socket.inet_ntoa(p[16:20]), struct.unpack('!H', p[22:24])[0])
-    return src, dst
-
-
-def _udp_repack(p, src, dst):
-    addrs = socket.inet_aton(src[0]) + socket.inet_aton(dst[0])
-    ports = struct.pack('!HH', src[1], dst[1])
-    return p[:12] + addrs + ports + p[24:]
-
-
-_real_dns_server = [None]
-
-
-def _handle_diversion(divertsock, dnsport):
-    p, tag = divertsock.recvfrom(4096)
-    src, dst = _udp_unpack(p)
-    debug3('got diverted packet from %r to %r\n' % (src, dst))
-    if dst[1] == 53:
-        # outgoing DNS
-        debug3('...packet is a DNS request.\n')
-        _real_dns_server[0] = dst
-        dst = ('127.0.0.1', dnsport)
-    elif src[1] == dnsport:
-        if islocal(src[0]):
-            debug3('...packet is a DNS response.\n')
-            src = _real_dns_server[0]
-    else:
-        log('weird?! unexpected divert from %r to %r\n' % (src, dst))
-        assert(0)
-    newp = _udp_repack(p, src, dst)
-    divertsock.sendto(newp, tag)
-
-
-def ipfw(*args):
-    argv = ['ipfw', '-q'] + list(args)
-    debug1('>> %s\n' % ' '.join(argv))
-    rv = ssubprocess.call(argv)
-    if rv:
-        raise Fatal('%r returned %d' % (argv, rv))
-
-
-def do_ipfw(port, dnsport, family, subnets, udp):
-    # IPv6 not supported
-    if family not in [socket.AF_INET, ]:
-        raise Exception(
-            'Address family "%s" unsupported by ipfw method'
-            % family_to_string(family))
-    if udp:
-        raise Exception("UDP not supported by ipfw method")
-
-    sport = str(port)
-    xsport = str(port + 1)
-
-    # cleanup any existing rules
-    if ipfw_rule_exists(port):
-        ipfw('delete', sport)
-
-    while _changedctls:
-        name = _changedctls.pop()
-        oldval = _oldctls[name]
-        _sysctl_set(name, oldval)
-
-    if subnets or dnsport:
-        sysctl_set('net.inet.ip.fw.enable', 1)
-        changed = sysctl_set('net.inet.ip.scopedroute', 0, permanent=True)
-        if changed:
-            log("\n"
-                "        WARNING: ONE-TIME NETWORK DISRUPTION:\n"
-                "        =====================================\n"
-                "sshuttle has changed a MacOS kernel setting to work around\n"
-                "a bug in MacOS 10.6.  This will cause your network to drop\n"
-                "within 5-10 minutes unless you restart your network\n"
-                "interface (change wireless networks or unplug/plug the\n"
-                "ethernet port) NOW, then restart sshuttle.  The fix is\n"
-                "permanent; you only have to do this once.\n\n")
-            sys.exit(1)
-
-        ipfw('add', sport, 'check-state', 'ip',
-             'from', 'any', 'to', 'any')
-
-    if subnets:
-        # create new subnet entries
-        for f, swidth, sexclude, snet \
-                in sorted(subnets, key=lambda s: s[1], reverse=True):
-            if sexclude:
-                ipfw('add', sport, 'skipto', xsport,
-                     'tcp',
-                     'from', 'any', 'to', '%s/%s' % (snet, swidth))
-            else:
-                ipfw('add', sport, 'fwd', '127.0.0.1,%d' % port,
-                     'tcp',
-                     'from', 'any', 'to', '%s/%s' % (snet, swidth),
-                     'not', 'ipttl', '42', 'keep-state', 'setup')
-
-    # This part is much crazier than it is on Linux, because MacOS (at least
-    # 10.6, and probably other versions, and maybe FreeBSD too) doesn't
-    # correctly fixup the dstip/dstport for UDP packets when it puts them
-    # through a 'fwd' rule.  It also doesn't fixup the srcip/srcport in the
-    # response packet.  In Linux iptables, all that happens magically for us,
-    # so we just redirect the packets and relax.
-    #
-    # On MacOS, we have to fix the ports ourselves.  For that, we use a
-    # 'divert' socket, which receives raw packets and lets us mangle them.
-    #
-    # Here's how it works.  Let's say the local DNS server is 1.1.1.1:53,
-    # and the remote DNS server is 2.2.2.2:53, and the local transproxy port
-    # is 10.0.0.1:12300, and a client machine is making a request from
-    # 10.0.0.5:9999. We see a packet like this:
-    #    10.0.0.5:9999 -> 1.1.1.1:53
-    # Since the destip:port matches one of our local nameservers, it will
-    # match a 'fwd' rule, thus grabbing it on the local machine.  However,
-    # the local kernel will then see a packet addressed to *:53 and
-    # not know what to do with it; there's nobody listening on port 53.  Thus,
-    # we divert it, rewriting it into this:
-    #    10.0.0.5:9999 -> 10.0.0.1:12300
-    # This gets proxied out to the server, which sends it to 2.2.2.2:53,
-    # and the answer comes back, and the proxy sends it back out like this:
-    #    10.0.0.1:12300 -> 10.0.0.5:9999
-    # But that's wrong!  The original machine expected an answer from
-    # 1.1.1.1:53, so we have to divert the *answer* and rewrite it:
-    #    1.1.1.1:53 -> 10.0.0.5:9999
-    #
-    # See?  Easy stuff.
-    if dnsport:
-        divertsock = socket.socket(socket.AF_INET, socket.SOCK_RAW,
-                                   IPPROTO_DIVERT)
-        divertsock.bind(('0.0.0.0', port))  # IP field is ignored
-
-        nslist = resolvconf_nameservers()
-        for f, ip in filter(lambda i: i[0] == family, nslist):
-            # relabel and then catch outgoing DNS requests
-            ipfw('add', sport, 'divert', sport,
-                 'udp',
-                 'from', 'any', 'to', '%s/32' % ip, '53',
-                 'not', 'ipttl', '42')
-        # relabel DNS responses
-        ipfw('add', sport, 'divert', sport,
-             'udp',
-             'from', 'any', str(dnsport), 'to', 'any',
-             'not', 'ipttl', '42')
-
-        def do_wait():
-            while 1:
-                r, w, x = select.select([sys.stdin, divertsock], [], [])
-                if divertsock in r:
-                    _handle_diversion(divertsock, dnsport)
-                if sys.stdin in r:
-                    return
-    else:
-        do_wait = None
-
-    return do_wait
-
-
-def program_exists(name):
-    paths = (os.getenv('PATH') or os.defpath).split(os.pathsep)
-    for p in paths:
-        fn = '%s/%s' % (p, name)
-        if os.path.exists(fn):
-            return not os.path.isdir(fn) and os.access(fn, os.X_OK)
-
-
-hostmap = {}
-
-
-def rewrite_etc_hosts(port):
-    HOSTSFILE = '/etc/hosts'
-    BAKFILE = '%s.sbak' % HOSTSFILE
-    APPEND = '# sshuttle-firewall-%d AUTOCREATED' % port
-    old_content = ''
-    st = None
-    try:
-        old_content = open(HOSTSFILE).read()
-        st = os.stat(HOSTSFILE)
-    except IOError, e:
-        if e.errno == errno.ENOENT:
-            pass
-        else:
-            raise
-    if old_content.strip() and not os.path.exists(BAKFILE):
-        os.link(HOSTSFILE, BAKFILE)
-    tmpname = "%s.%d.tmp" % (HOSTSFILE, port)
-    f = open(tmpname, 'w')
-    for line in old_content.rstrip().split('\n'):
-        if line.find(APPEND) >= 0:
-            continue
-        f.write('%s\n' % line)
-    for (name, ip) in sorted(hostmap.items()):
-        f.write('%-30s %s\n' % ('%s %s' % (ip, name), APPEND))
-    f.close()
-
-    if st:
-        os.chown(tmpname, st.st_uid, st.st_gid)
-        os.chmod(tmpname, st.st_mode)
-    else:
-        os.chown(tmpname, 0, 0)
-        os.chmod(tmpname, 0644)
-    os.rename(tmpname, HOSTSFILE)
-
-
-def restore_etc_hosts(port):
-    global hostmap
-    hostmap = {}
-    rewrite_etc_hosts(port)
-
-
-# This is some voodoo for setting up the kernel's transparent
-# proxying stuff.  If subnets is empty, we just delete our sshuttle rules;
-# otherwise we delete it, then make them from scratch.
-#
-# This code is supposed to clean up after itself by deleting its rules on
-# exit.  In case that fails, it's not the end of the world; future runs will
-# supercede it in the transproxy list, at least, so the leftover rules
-# are hopefully harmless.
-def main(port_v6, port_v4, dnsport_v6, dnsport_v4, method, udp, syslog):
-    assert(port_v6 >= 0)
-    assert(port_v6 <= 65535)
-    assert(port_v4 >= 0)
-    assert(port_v4 <= 65535)
-    assert(dnsport_v6 >= 0)
-    assert(dnsport_v6 <= 65535)
-    assert(dnsport_v4 >= 0)
-    assert(dnsport_v4 <= 65535)
-
-    if os.getuid() != 0:
-        raise Fatal('you must be root (or enable su/sudo) to set the firewall')
-
-    if method == "auto":
-        if program_exists('ipfw'):
-            method = "ipfw"
-        elif program_exists('iptables'):
-            method = "nat"
-        else:
-            raise Fatal("can't find either ipfw or iptables; check your PATH")
-
-    if method == "nat":
-        do_it = do_iptables_nat
-    elif method == "tproxy":
-        do_it = do_iptables_tproxy
-    elif method == "ipfw":
-        do_it = do_ipfw
-    else:
-        raise Exception('Unknown method "%s"' % method)
-
-    # because of limitations of the 'su' command, the *real* stdin/stdout
-    # are both attached to stdout initially.  Clone stdout into stdin so we
-    # can read from it.
-    os.dup2(1, 0)
-
-    if syslog:
-        ssyslog.start_syslog()
-        ssyslog.stderr_to_syslog()
-
-    debug1('firewall manager ready method %s.\n' % method)
-    sys.stdout.write('READY %s\n' % method)
-    sys.stdout.flush()
-
-    # don't disappear if our controlling terminal or stdout/stderr
-    # disappears; we still have to clean up.
-    signal.signal(signal.SIGHUP, signal.SIG_IGN)
-    signal.signal(signal.SIGPIPE, signal.SIG_IGN)
-    signal.signal(signal.SIGTERM, signal.SIG_IGN)
-    signal.signal(signal.SIGINT, signal.SIG_IGN)
-
-    # ctrl-c shouldn't be passed along to me.  When the main sshuttle dies,
-    # I'll die automatically.
-    os.setsid()
-
-    # we wait until we get some input before creating the rules.  That way,
-    # sshuttle can launch us as early as possible (and get sudo password
-    # authentication as early in the startup process as possible).
-    line = sys.stdin.readline(128)
-    if not line:
-        return  # parent died; nothing to do
-
-    subnets = []
-    if line != 'ROUTES\n':
-        raise Fatal('firewall: expected ROUTES but got %r' % line)
-    while 1:
-        line = sys.stdin.readline(128)
-        if not line:
-            raise Fatal('firewall: expected route but got %r' % line)
-        elif line == 'GO\n':
-            break
-        try:
-            (family, width, exclude, ip) = line.strip().split(',', 3)
-        except:
-            raise Fatal('firewall: expected route or GO but got %r' % line)
-        subnets.append((int(family), int(width), bool(int(exclude)), ip))
-
-    try:
-        if line:
-            debug1('firewall manager: starting transproxy.\n')
-
-            subnets_v6 = filter(lambda i: i[0] == socket.AF_INET6, subnets)
-            if port_v6:
-                do_wait = do_it(
-                    port_v6, dnsport_v6, socket.AF_INET6, subnets_v6, udp)
-            elif len(subnets_v6) > 0:
-                debug1("IPv6 subnets defined but IPv6 disabled\n")
-
-            subnets_v4 = filter(lambda i: i[0] == socket.AF_INET, subnets)
-            if port_v4:
-                do_wait = do_it(
-                    port_v4, dnsport_v4, socket.AF_INET, subnets_v4, udp)
-            elif len(subnets_v4) > 0:
-                debug1('IPv4 subnets defined but IPv4 disabled\n')
-
-            sys.stdout.write('STARTED\n')
-
-        try:
-            sys.stdout.flush()
-        except IOError:
-            # the parent process died for some reason; he's surely been loud
-            # enough, so no reason to report another error
-            return
-
-        # Now we wait until EOF or any other kind of exception.  We need
-        # to stay running so that we don't need a *second* password
-        # authentication at shutdown time - that cleanup is important!
-        while 1:
-            if do_wait:
-                do_wait()
-            line = sys.stdin.readline(128)
-            if line.startswith('HOST '):
-                (name, ip) = line[5:].strip().split(',', 1)
-                hostmap[name] = ip
-                rewrite_etc_hosts(port_v6 or port_v4)
-            elif line:
-                raise Fatal('expected EOF, got %r' % line)
-            else:
-                break
-    finally:
-        try:
-            debug1('firewall manager: undoing changes.\n')
-        except:
-            pass
-        if port_v6:
-            do_it(port_v6, 0, socket.AF_INET6, [], udp)
-        if port_v4:
-            do_it(port_v4, 0, socket.AF_INET, [], udp)
-        restore_etc_hosts(port_v6 or port_v4)

src/helpers.py

@@ -1,91 +0,0 @@
-import sys
-import socket
-import errno
-
-logprefix = ''
-verbose = 0
-
-
-def log(s):
-    try:
-        sys.stdout.flush()
-        sys.stderr.write(logprefix + s)
-        sys.stderr.flush()
-    except IOError:
-        # this could happen if stderr gets forcibly disconnected, eg. because
-        # our tty closes.  That sucks, but it's no reason to abort the program.
-        pass
-
-
-def debug1(s):
-    if verbose >= 1:
-        log(s)
-
-
-def debug2(s):
-    if verbose >= 2:
-        log(s)
-
-
-def debug3(s):
-    if verbose >= 3:
-        log(s)
-
-
-class Fatal(Exception):
-    pass
-
-
-def list_contains_any(l, sub):
-    for i in sub:
-        if i in l:
-            return True
-    return False
-
-
-def resolvconf_nameservers():
-    l = []
-    for line in open('/etc/resolv.conf'):
-        words = line.lower().split()
-        if len(words) >= 2 and words[0] == 'nameserver':
-            if ':' in words[1]:
-                l.append((socket.AF_INET6, words[1]))
-            else:
-                l.append((socket.AF_INET, words[1]))
-    return l
-
-
-def resolvconf_random_nameserver():
-    l = resolvconf_nameservers()
-    if l:
-        if len(l) > 1:
-            # don't import this unless we really need it
-            import random
-            random.shuffle(l)
-        return l[0]
-    else:
-        return (socket.AF_INET, '127.0.0.1')
-
-
-def islocal(ip, family):
-    sock = socket.socket(family)
-    try:
-        try:
-            sock.bind((ip, 0))
-        except socket.error, e:
-            if e.args[0] == errno.EADDRNOTAVAIL:
-                return False  # not a local IP
-            else:
-                raise
-    finally:
-        sock.close()
-    return True  # it's a local IP, or there would have been an error
-
-
-def family_to_string(family):
-    if family == socket.AF_INET6:
-        return "AF_INET6"
-    elif family == socket.AF_INET:
-        return "AF_INET"
-    else:
-        return str(family)

src/hostwatch.py

@@ -1,287 +0,0 @@
-import time
-import socket
-import re
-import select
-import errno
-import os
-import sys
-if not globals().get('skip_imports'):
-    import compat.ssubprocess as ssubprocess
-    import helpers
-    from helpers import log, debug1, debug2, debug3
-
-POLL_TIME = 60 * 15
-NETSTAT_POLL_TIME = 30
-CACHEFILE = os.path.expanduser('~/.sshuttle.hosts')
-
-
-_nmb_ok = True
-_smb_ok = True
-hostnames = {}
-queue = {}
-try:
-    null = open('/dev/null', 'wb')
-except IOError, e:
-    log('warning: %s\n' % e)
-    null = os.popen("sh -c 'while read x; do :; done'", 'wb', 4096)
-
-
-def _is_ip(s):
-    return re.match(r'\d+\.\d+\.\d+\.\d+$', s)
-
-
-def write_host_cache():
-    tmpname = '%s.%d.tmp' % (CACHEFILE, os.getpid())
-    try:
-        f = open(tmpname, 'wb')
-        for name, ip in sorted(hostnames.items()):
-            f.write('%s,%s\n' % (name, ip))
-        f.close()
-        os.rename(tmpname, CACHEFILE)
-    finally:
-        try:
-            os.unlink(tmpname)
-        except:
-            pass
-
-
-def read_host_cache():
-    try:
-        f = open(CACHEFILE)
-    except IOError, e:
-        if e.errno == errno.ENOENT:
-            return
-        else:
-            raise
-    for line in f:
-        words = line.strip().split(',')
-        if len(words) == 2:
-            (name, ip) = words
-            name = re.sub(r'[^-\w]', '-', name).strip()
-            ip = re.sub(r'[^0-9.]', '', ip).strip()
-            if name and ip:
-                found_host(name, ip)
-
-
-def found_host(hostname, ip):
-    hostname = re.sub(r'\..*', '', hostname)
-    hostname = re.sub(r'[^-\w]', '_', hostname)
-    if (ip.startswith('127.') or ip.startswith('255.')
-            or hostname == 'localhost'):
-        return
-    oldip = hostnames.get(hostname)
-    if oldip != ip:
-        hostnames[hostname] = ip
-        debug1('Found: %s: %s\n' % (hostname, ip))
-        sys.stdout.write('%s,%s\n' % (hostname, ip))
-        write_host_cache()
-
-
-def _check_etc_hosts():
-    debug2(' > hosts\n')
-    for line in open('/etc/hosts'):
-        line = re.sub(r'#.*', '', line)
-        words = line.strip().split()
-        if not words:
-            continue
-        ip = words[0]
-        names = words[1:]
-        if _is_ip(ip):
-            debug3('<    %s %r\n' % (ip, names))
-            for n in names:
-                check_host(n)
-                found_host(n, ip)
-
-
-def _check_revdns(ip):
-    debug2(' > rev: %s\n' % ip)
-    try:
-        r = socket.gethostbyaddr(ip)
-        debug3('<    %s\n' % r[0])
-        check_host(r[0])
-        found_host(r[0], ip)
-    except socket.herror:
-        pass
-
-
-def _check_dns(hostname):
-    debug2(' > dns: %s\n' % hostname)
-    try:
-        ip = socket.gethostbyname(hostname)
-        debug3('<    %s\n' % ip)
-        check_host(ip)
-        found_host(hostname, ip)
-    except socket.gaierror:
-        pass
-
-
-def _check_netstat():
-    debug2(' > netstat\n')
-    argv = ['netstat', '-n']
-    try:
-        p = ssubprocess.Popen(argv, stdout=ssubprocess.PIPE, stderr=null)
-        content = p.stdout.read()
-        p.wait()
-    except OSError, e:
-        log('%r failed: %r\n' % (argv, e))
-        return
-
-    for ip in re.findall(r'\d+\.\d+\.\d+\.\d+', content):
-        debug3('<    %s\n' % ip)
-        check_host(ip)
-
-
-def _check_smb(hostname):
-    return
-    global _smb_ok
-    if not _smb_ok:
-        return
-    argv = ['smbclient', '-U', '%', '-L', hostname]
-    debug2(' > smb: %s\n' % hostname)
-    try:
-        p = ssubprocess.Popen(argv, stdout=ssubprocess.PIPE, stderr=null)
-        lines = p.stdout.readlines()
-        p.wait()
-    except OSError, e:
-        log('%r failed: %r\n' % (argv, e))
-        _smb_ok = False
-        return
-
-    lines.reverse()
-
-    # junk at top
-    while lines:
-        line = lines.pop().strip()
-        if re.match(r'Server\s+', line):
-            break
-
-    # server list section:
-    #    Server   Comment
-    #    ------   -------
-    while lines:
-        line = lines.pop().strip()
-        if not line or re.match(r'-+\s+-+', line):
-            continue
-        if re.match(r'Workgroup\s+Master', line):
-            break
-        words = line.split()
-        hostname = words[0].lower()
-        debug3('<    %s\n' % hostname)
-        check_host(hostname)
-
-    # workgroup list section:
-    #   Workgroup  Master
-    #   ---------  ------
-    while lines:
-        line = lines.pop().strip()
-        if re.match(r'-+\s+', line):
-            continue
-        if not line:
-            break
-        words = line.split()
-        (workgroup, hostname) = (words[0].lower(), words[1].lower())
-        debug3('<    group(%s) -> %s\n' % (workgroup, hostname))
-        check_host(hostname)
-        check_workgroup(workgroup)
-
-    if lines:
-        assert(0)
-
-
-def _check_nmb(hostname, is_workgroup, is_master):
-    return
-    global _nmb_ok
-    if not _nmb_ok:
-        return
-    argv = ['nmblookup'] + ['-M'] * is_master + ['--', hostname]
-    debug2(' > n%d%d: %s\n' % (is_workgroup, is_master, hostname))
-    try:
-        p = ssubprocess.Popen(argv, stdout=ssubprocess.PIPE, stderr=null)
-        lines = p.stdout.readlines()
-        rv = p.wait()
-    except OSError, e:
-        log('%r failed: %r\n' % (argv, e))
-        _nmb_ok = False
-        return
-    if rv:
-        log('%r returned %d\n' % (argv, rv))
-        return
-    for line in lines:
-        m = re.match(r'(\d+\.\d+\.\d+\.\d+) (\w+)<\w\w>\n', line)
-        if m:
-            g = m.groups()
-            (ip, name) = (g[0], g[1].lower())
-            debug3('<    %s -> %s\n' % (name, ip))
-            if is_workgroup:
-                _enqueue(_check_smb, ip)
-            else:
-                found_host(name, ip)
-                check_host(name)
-
-
-def check_host(hostname):
-    if _is_ip(hostname):
-        _enqueue(_check_revdns, hostname)
-    else:
-        _enqueue(_check_dns, hostname)
-    _enqueue(_check_smb, hostname)
-    _enqueue(_check_nmb, hostname, False, False)
-
-
-def check_workgroup(hostname):
-    _enqueue(_check_nmb, hostname, True, False)
-    _enqueue(_check_nmb, hostname, True, True)
-
-
-def _enqueue(op, *args):
-    t = (op, args)
-    if queue.get(t) is None:
-        queue[t] = 0
-
-
-def _stdin_still_ok(timeout):
-    r, w, x = select.select([sys.stdin.fileno()], [], [], timeout)
-    if r:
-        b = os.read(sys.stdin.fileno(), 4096)
-        if not b:
-            return False
-    return True
-
-
-def hw_main(seed_hosts):
-    if helpers.verbose >= 2:
-        helpers.logprefix = 'HH: '
-    else:
-        helpers.logprefix = 'hostwatch: '
-
-    read_host_cache()
-
-    _enqueue(_check_etc_hosts)
-    _enqueue(_check_netstat)
-    check_host('localhost')
-    check_host(socket.gethostname())
-    check_workgroup('workgroup')
-    check_workgroup('-')
-    for h in seed_hosts:
-        check_host(h)
-
-    while 1:
-        now = time.time()
-        for t, last_polled in queue.items():
-            (op, args) = t
-            if not _stdin_still_ok(0):
-                break
-            maxtime = POLL_TIME
-            if op == _check_netstat:
-                maxtime = NETSTAT_POLL_TIME
-            if now - last_polled > maxtime:
-                queue[t] = time.time()
-                op(*args)
-            try:
-                sys.stdout.flush()
-            except IOError:
-                break
-
-        # FIXME: use a smarter timeout based on oldest last_polled
-        if not _stdin_still_ok(1):
-            break

src/main.py

@@ -1,230 +0,0 @@
-import sys
-import re
-import socket
-import helpers
-import options
-import client
-import server
-import firewall
-import hostwatch
-from helpers import log, Fatal
-
-
-# 1.2.3.4/5 or just 1.2.3.4
-def parse_subnet4(s):
-    m = re.match(r'(\d+)(?:\.(\d+)\.(\d+)\.(\d+))?(?:/(\d+))?$', s)
-    if not m:
-        raise Fatal('%r is not a valid IP subnet format' % s)
-    (a, b, c, d, width) = m.groups()
-    (a, b, c, d) = (int(a or 0), int(b or 0), int(c or 0), int(d or 0))
-    if width is None:
-        width = 32
-    else:
-        width = int(width)
-    if a > 255 or b > 255 or c > 255 or d > 255:
-        raise Fatal('%d.%d.%d.%d has numbers > 255' % (a, b, c, d))
-    if width > 32:
-        raise Fatal('*/%d is greater than the maximum of 32' % width)
-    return(socket.AF_INET, '%d.%d.%d.%d' % (a, b, c, d), width)
-
-
-# 1:2::3/64 or just 1:2::3
-def parse_subnet6(s):
-    m = re.match(r'(?:([a-fA-F\d:]+))?(?:/(\d+))?$', s)
-    if not m:
-        raise Fatal('%r is not a valid IP subnet format' % s)
-    (net, width) = m.groups()
-    if width is None:
-        width = 128
-    else:
-        width = int(width)
-    if width > 128:
-        raise Fatal('*/%d is greater than the maximum of 128' % width)
-    return(socket.AF_INET6, net, width)
-
-
-# Subnet file, supporting empty lines and hash-started comment lines
-def parse_subnet_file(s):
-    try:
-        handle = open(s, 'r')
-    except OSError:
-        raise Fatal('Unable to open subnet file: %s' % s)
-
-    raw_config_lines = handle.readlines()
-    config_lines = []
-    for line_no, line in enumerate(raw_config_lines):
-        line = line.strip()
-        if len(line) == 0:
-            continue
-        if line[0] == '#':
-            continue
-        config_lines.append(line)
-
-    return config_lines
-
-
-# list of:
-# 1.2.3.4/5 or just 1.2.3.4
-# 1:2::3/64 or just 1:2::3
-def parse_subnets(subnets_str):
-    subnets = []
-    for s in subnets_str:
-        if ':' in s:
-            subnet = parse_subnet6(s)
-        else:
-            subnet = parse_subnet4(s)
-        subnets.append(subnet)
-    return subnets
-
-
-# 1.2.3.4:567 or just 1.2.3.4 or just 567
-def parse_ipport4(s):
-    s = str(s)
-    m = re.match(r'(?:(\d+)\.(\d+)\.(\d+)\.(\d+))?(?::)?(?:(\d+))?$', s)
-    if not m:
-        raise Fatal('%r is not a valid IP:port format' % s)
-    (a, b, c, d, port) = m.groups()
-    (a, b, c, d, port) = (int(a or 0), int(b or 0), int(c or 0), int(d or 0),
-                          int(port or 0))
-    if a > 255 or b > 255 or c > 255 or d > 255:
-        raise Fatal('%d.%d.%d.%d has numbers > 255' % (a, b, c, d))
-    if port > 65535:
-        raise Fatal('*:%d is greater than the maximum of 65535' % port)
-    if a is None:
-        a = b = c = d = 0
-    return ('%d.%d.%d.%d' % (a, b, c, d), port)
-
-
-# [1:2::3]:456 or [1:2::3] or 456
-def parse_ipport6(s):
-    s = str(s)
-    m = re.match(r'(?:\[([^]]*)])?(?::)?(?:(\d+))?$', s)
-    if not m:
-        raise Fatal('%s is not a valid IP:port format' % s)
-    (ip, port) = m.groups()
-    (ip, port) = (ip or '::', int(port or 0))
-    return (ip, port)
-
-
-optspec = """
-sshuttle [-l [ip:]port] [-r [username@]sshserver[:port]] <subnets...>
-sshuttle --server
-sshuttle --firewall <port> <subnets...>
-sshuttle --hostwatch
---
-l,listen=  transproxy to this ip address and port number
-H,auto-hosts scan for remote hostnames and update local /etc/hosts
-N,auto-nets  automatically determine subnets to route
-dns        capture local DNS requests and forward to the remote DNS server
-method=    auto, nat, tproxy, or ipfw
-python=    path to python interpreter on the remote server
-r,remote=  ssh hostname (and optional username) of remote sshuttle server
-x,exclude= exclude this subnet (can be used more than once)
-X,exclude-from=  exclude the subnets in a file (whitespace separated)
-v,verbose  increase debug message verbosity
-e,ssh-cmd= the command to use to connect to the remote [ssh]
-seed-hosts= with -H, use these hostnames for initial scan (comma-separated)
-no-latency-control  sacrifice latency to improve bandwidth benchmarks
-wrap=      restart counting channel numbers after this number (for testing)
-D,daemon   run in the background as a daemon
-s,subnets= file where the subnets are stored, instead of on the command line
-syslog     send log messages to syslog (default if you use --daemon)
-pidfile=   pidfile name (only if using --daemon) [./sshuttle.pid]
-server     (internal use only)
-firewall   (internal use only)
-hostwatch  (internal use only)
-"""
-o = options.Options(optspec)
-(opt, flags, extra) = o.parse(sys.argv[2:])
-
-if opt.daemon:
-    opt.syslog = 1
-if opt.wrap:
-    import ssnet
-    ssnet.MAX_CHANNEL = int(opt.wrap)
-helpers.verbose = opt.verbose
-
-try:
-    if opt.server:
-        if len(extra) != 0:
-            o.fatal('no arguments expected')
-        server.latency_control = opt.latency_control
-        sys.exit(server.main())
-    elif opt.firewall:
-        if len(extra) != 6:
-            o.fatal('exactly six arguments expected')
-        sys.exit(firewall.main(int(extra[0]), int(extra[1]),
-                               int(extra[2]), int(extra[3]),
-                               extra[4], int(extra[5]), opt.syslog))
-    elif opt.hostwatch:
-        sys.exit(hostwatch.hw_main(extra))
-    else:
-        if len(extra) < 1 and not opt.auto_nets and not opt.subnets:
-            o.fatal('at least one subnet, subnet file, or -N expected')
-        includes = extra
-        excludes = ['127.0.0.0/8']
-        for k, v in flags:
-            if k in ('-x', '--exclude'):
-                excludes.append(v)
-            if k in ('-X', '--exclude-from'):
-                excludes += open(v).read().split()
-        remotename = opt.remote
-        if remotename == '' or remotename == '-':
-            remotename = None
-        if opt.seed_hosts and not opt.auto_hosts:
-            o.fatal('--seed-hosts only works if you also use -H')
-        if opt.seed_hosts:
-            sh = re.split(r'[\s,]+', (opt.seed_hosts or "").strip())
-        elif opt.auto_hosts:
-            sh = []
-        else:
-            sh = None
-        if opt.subnets:
-            includes = parse_subnet_file(opt.subnets)
-        if not opt.method:
-            method = "auto"
-        elif opt.method in ["auto", "nat", "tproxy", "ipfw"]:
-            method = opt.method
-        else:
-            o.fatal("method %s not supported" % opt.method)
-        if not opt.listen:
-            if opt.method == "tproxy":
-                ipport_v6 = parse_ipport6('[::1]:0')
-            else:
-                ipport_v6 = None
-            ipport_v4 = parse_ipport4('127.0.0.1:0')
-        else:
-            ipport_v6 = None
-            ipport_v4 = None
-            list = opt.listen.split(",")
-            for ip in list:
-                if '[' in ip and ']' in ip and opt.method == "tproxy":
-                    ipport_v6 = parse_ipport6(ip)
-                else:
-                    ipport_v4 = parse_ipport4(ip)
-        return_code = client.main(ipport_v6, ipport_v4,
-                                  opt.ssh_cmd,
-                                  remotename,
-                                  opt.python,
-                                  opt.latency_control,
-                                  opt.dns,
-                                  method,
-                                  sh,
-                                  opt.auto_nets,
-                                  parse_subnets(includes),
-                                  parse_subnets(excludes),
-                                  opt.syslog, opt.daemon, opt.pidfile)
-
-        if return_code == 0:
-            log('Normal exit code, exiting...')
-        else:
-            log('Abnormal exit code detected, failing...' % return_code)
-        sys.exit(return_code)
-
-except Fatal, e:
-    log('fatal: %s\n' % e)
-    sys.exit(99)
-except KeyboardInterrupt:
-    log('\n')
-    log('Keyboard interrupt: exiting.\n')
-    sys.exit(1)

src/options.py

@@ -1,213 +0,0 @@
-"""Command-line options parser.
-With the help of an options spec string, easily parse command-line options.
-"""
-import sys
-import os
-import textwrap
-import getopt
-import re
-import struct
-
-
-class OptDict:
-
-    def __init__(self):
-        self._opts = {}
-
-    def __setitem__(self, k, v):
-        if k.startswith('no-') or k.startswith('no_'):
-            k = k[3:]
-            v = not v
-        self._opts[k] = v
-
-    def __getitem__(self, k):
-        if k.startswith('no-') or k.startswith('no_'):
-            return not self._opts[k[3:]]
-        return self._opts[k]
-
-    def __getattr__(self, k):
-        return self[k]
-
-
-def _default_onabort(msg):
-    sys.exit(97)
-
-
-def _intify(v):
-    try:
-        vv = int(v or '')
-        if str(vv) == v:
-            return vv
-    except ValueError:
-        pass
-    return v
-
-
-def _atoi(v):
-    try:
-        return int(v or 0)
-    except ValueError:
-        return 0
-
-
-def _remove_negative_kv(k, v):
-    if k.startswith('no-') or k.startswith('no_'):
-        return k[3:], not v
-    return k, v
-
-
-def _remove_negative_k(k):
-    return _remove_negative_kv(k, None)[0]
-
-
-def _tty_width():
-    s = struct.pack("HHHH", 0, 0, 0, 0)
-    try:
-        import fcntl
-        import termios
-        s = fcntl.ioctl(sys.stderr.fileno(), termios.TIOCGWINSZ, s)
-    except (IOError, ImportError):
-        return _atoi(os.environ.get('WIDTH')) or 70
-    (ysize, xsize, ypix, xpix) = struct.unpack('HHHH', s)
-    return xsize or 70
-
-
-class Options:
-
-    """Option parser.
-    When constructed, two strings are mandatory. The first one is the command
-    name showed before error messages. The second one is a string called an
-    optspec that specifies the synopsis and option flags and their description.
-    For more information about optspecs, consult the bup-options(1) man page.
-
-    Two optional arguments specify an alternative parsing function and an
-    alternative behaviour on abort (after having output the usage string).
-
-    By default, the parser function is getopt.gnu_getopt, and the abort
-    behaviour is to exit the program.
-    """
-
-    def __init__(self, optspec, optfunc=getopt.gnu_getopt,
-                 onabort=_default_onabort):
-        self.optspec = optspec
-        self._onabort = onabort
-        self.optfunc = optfunc
-        self._aliases = {}
-        self._shortopts = 'h?'
-        self._longopts = ['help']
-        self._hasparms = {}
-        self._defaults = {}
-        self._usagestr = self._gen_usage()
-
-    def _gen_usage(self):
-        out = []
-        lines = self.optspec.strip().split('\n')
-        lines.reverse()
-        first_syn = True
-        while lines:
-            l = lines.pop()
-            if l == '--':
-                break
-            out.append('%s: %s\n' % (first_syn and 'usage' or '   or', l))
-            first_syn = False
-        out.append('\n')
-        last_was_option = False
-        while lines:
-            l = lines.pop()
-            if l.startswith(' '):
-                out.append('%s%s\n' % (last_was_option and '\n' or '',
-                                       l.lstrip()))
-                last_was_option = False
-            elif l:
-                (flags, extra) = l.split(' ', 1)
-                extra = extra.strip()
-                if flags.endswith('='):
-                    flags = flags[:-1]
-                    has_parm = 1
-                else:
-                    has_parm = 0
-                g = re.search(r'\[([^\]]*)\]$', extra)
-                if g:
-                    defval = g.group(1)
-                else:
-                    defval = None
-                flagl = flags.split(',')
-                flagl_nice = []
-                for _f in flagl:
-                    f, dvi = _remove_negative_kv(_f, _intify(defval))
-                    self._aliases[f] = _remove_negative_k(flagl[0])
-                    self._hasparms[f] = has_parm
-                    self._defaults[f] = dvi
-                    if len(f) == 1:
-                        self._shortopts += f + (has_parm and ':' or '')
-                        flagl_nice.append('-' + f)
-                    else:
-                        f_nice = re.sub(r'\W', '_', f)
-                        self._aliases[f_nice] = _remove_negative_k(flagl[0])
-                        self._longopts.append(f + (has_parm and '=' or ''))
-                        self._longopts.append('no-' + f)
-                        flagl_nice.append('--' + _f)
-                flags_nice = ', '.join(flagl_nice)
-                if has_parm:
-                    flags_nice += ' ...'
-                prefix = '    %-20s  ' % flags_nice
-                argtext = '\n'.join(textwrap.wrap(extra, width=_tty_width(),
-                                                  initial_indent=prefix,
-                                                  subsequent_indent=' ' * 28))
-                out.append(argtext + '\n')
-                last_was_option = True
-            else:
-                out.append('\n')
-                last_was_option = False
-        return ''.join(out).rstrip() + '\n'
-
-    def usage(self, msg=""):
-        """Print usage string to stderr and abort."""
-        sys.stderr.write(self._usagestr)
-        e = self._onabort and self._onabort(msg) or None
-        if e:
-            raise e
-
-    def fatal(self, s):
-        """Print an error message to stderr and abort with usage string."""
-        msg = 'error: %s\n' % s
-        sys.stderr.write(msg)
-        return self.usage(msg)
-
-    def parse(self, args):
-        """Parse a list of arguments and return (options, flags, extra).
-
-        In the returned tuple, "options" is an OptDict with known options,
-        "flags" is a list of option flags that were used on the command-line,
-        and "extra" is a list of positional arguments.
-        """
-        try:
-            (flags, extra) = self.optfunc(
-                args, self._shortopts, self._longopts)
-        except getopt.GetoptError, e:
-            self.fatal(e)
-
-        opt = OptDict()
-
-        for k, v in self._defaults.iteritems():
-            k = self._aliases[k]
-            opt[k] = v
-
-        for (k, v) in flags:
-            k = k.lstrip('-')
-            if k in ('h', '?', 'help'):
-                self.usage()
-            if k.startswith('no-'):
-                k = self._aliases[k[3:]]
-                v = 0
-            else:
-                k = self._aliases[k]
-                if not self._hasparms[k]:
-                    assert(v == '')
-                    v = (opt._opts.get(k) or 0) + 1
-                else:
-                    v = _intify(v)
-            opt[k] = v
-        for (f1, f2) in self._aliases.iteritems():
-            opt[f1] = opt._opts.get(f2)
-        return (opt, flags, extra)

src/server.py

@@ -1,335 +0,0 @@
-import re
-import struct
-import socket
-import traceback
-import time
-import sys
-import os
-if not globals().get('skip_imports'):
-    import ssnet
-    import helpers
-    import hostwatch
-    import compat.ssubprocess as ssubprocess
-    from ssnet import Handler, Proxy, Mux, MuxWrapper
-    from helpers import log, debug1, debug2, debug3, Fatal, \
-        resolvconf_random_nameserver
-
-
-if not globals().get('latency_control'):
-    latency_control = None
-
-
-def _ipmatch(ipstr):
-    if ipstr == 'default':
-        ipstr = '0.0.0.0/0'
-    m = re.match(r'^(\d+(\.\d+(\.\d+(\.\d+)?)?)?)(?:/(\d+))?$', ipstr)
-    if m:
-        g = m.groups()
-        ips = g[0]
-        width = int(g[4] or 32)
-        if g[1] is None:
-            ips += '.0.0.0'
-            width = min(width, 8)
-        elif g[2] is None:
-            ips += '.0.0'
-            width = min(width, 16)
-        elif g[3] is None:
-            ips += '.0'
-            width = min(width, 24)
-        return (struct.unpack('!I', socket.inet_aton(ips))[0], width)
-
-
-def _ipstr(ip, width):
-    if width >= 32:
-        return ip
-    else:
-        return "%s/%d" % (ip, width)
-
-
-def _maskbits(netmask):
-    if not netmask:
-        return 32
-    for i in range(32):
-        if netmask[0] & _shl(1, i):
-            return 32 - i
-    return 0
-
-
-def _shl(n, bits):
-    return n * int(2 ** bits)
-
-
-def _list_routes():
-    argv = ['netstat', '-rn']
-    p = ssubprocess.Popen(argv, stdout=ssubprocess.PIPE)
-    routes = []
-    for line in p.stdout:
-        cols = re.split(r'\s+', line)
-        ipw = _ipmatch(cols[0])
-        if not ipw:
-            continue  # some lines won't be parseable; never mind
-        maskw = _ipmatch(cols[2])  # linux only
-        mask = _maskbits(maskw)   # returns 32 if maskw is null
-        width = min(ipw[1], mask)
-        ip = ipw[0] & _shl(_shl(1, width) - 1, 32 - width)
-        routes.append(
-            (socket.AF_INET, socket.inet_ntoa(struct.pack('!I', ip)), width))
-    rv = p.wait()
-    if rv != 0:
-        log('WARNING: %r returned %d\n' % (argv, rv))
-        log('WARNING: That prevents --auto-nets from working.\n')
-    return routes
-
-
-def list_routes():
-    for (family, ip, width) in _list_routes():
-        if not ip.startswith('0.') and not ip.startswith('127.'):
-            yield (family, ip, width)
-
-
-def _exc_dump():
-    exc_info = sys.exc_info()
-    return ''.join(traceback.format_exception(*exc_info))
-
-
-def start_hostwatch(seed_hosts):
-    s1, s2 = socket.socketpair()
-    pid = os.fork()
-    if not pid:
-        # child
-        rv = 99
-        try:
-            try:
-                s2.close()
-                os.dup2(s1.fileno(), 1)
-                os.dup2(s1.fileno(), 0)
-                s1.close()
-                rv = hostwatch.hw_main(seed_hosts) or 0
-            except Exception:
-                log('%s\n' % _exc_dump())
-                rv = 98
-        finally:
-            os._exit(rv)
-    s1.close()
-    return pid, s2
-
-
-class Hostwatch:
-
-    def __init__(self):
-        self.pid = 0
-        self.sock = None
-
-
-class DnsProxy(Handler):
-
-    def __init__(self, mux, chan, request):
-        # FIXME! IPv4 specific
-        sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-        Handler.__init__(self, [sock])
-        self.timeout = time.time() + 30
-        self.mux = mux
-        self.chan = chan
-        self.tries = 0
-        self.peer = None
-        self.request = request
-        self.sock = sock
-        # FIXME! IPv4 specific
-        self.sock.setsockopt(socket.SOL_IP, socket.IP_TTL, 42)
-        self.try_send()
-
-    def try_send(self):
-        if self.tries >= 3:
-            return
-        self.tries += 1
-        # FIXME! Support IPv6 nameservers
-        self.peer = resolvconf_random_nameserver()[1]
-        self.sock.connect((self.peer, 53))
-        debug2('DNS: sending to %r\n' % self.peer)
-        try:
-            self.sock.send(self.request)
-        except socket.error, e:
-            if e.args[0] in ssnet.NET_ERRS:
-                # might have been spurious; try again.
-                # Note: these errors sometimes are reported by recv(),
-                # and sometimes by send().  We have to catch both.
-                debug2('DNS send to %r: %s\n' % (self.peer, e))
-                self.try_send()
-                return
-            else:
-                log('DNS send to %r: %s\n' % (self.peer, e))
-                return
-
-    def callback(self):
-        try:
-            data = self.sock.recv(4096)
-        except socket.error, e:
-            if e.args[0] in ssnet.NET_ERRS:
-                # might have been spurious; try again.
-                # Note: these errors sometimes are reported by recv(),
-                # and sometimes by send().  We have to catch both.
-                debug2('DNS recv from %r: %s\n' % (self.peer, e))
-                self.try_send()
-                return
-            else:
-                log('DNS recv from %r: %s\n' % (self.peer, e))
-                return
-        debug2('DNS response: %d bytes\n' % len(data))
-        self.mux.send(self.chan, ssnet.CMD_DNS_RESPONSE, data)
-        self.ok = False
-
-
-class UdpProxy(Handler):
-
-    def __init__(self, mux, chan, family):
-        sock = socket.socket(family, socket.SOCK_DGRAM)
-        Handler.__init__(self, [sock])
-        self.timeout = time.time() + 30
-        self.mux = mux
-        self.chan = chan
-        self.sock = sock
-        if family == socket.AF_INET:
-            self.sock.setsockopt(socket.SOL_IP, socket.IP_TTL, 42)
-
-    def send(self, dstip, data):
-        debug2('UDP: sending to %r port %d\n' % dstip)
-        try:
-            self.sock.sendto(data, dstip)
-        except socket.error, e:
-            log('UDP send to %r port %d: %s\n' % (dstip[0], dstip[1], e))
-            return
-
-    def callback(self):
-        try:
-            data, peer = self.sock.recvfrom(4096)
-        except socket.error, e:
-            log('UDP recv from %r port %d: %s\n' % (peer[0], peer[1], e))
-            return
-        debug2('UDP response: %d bytes\n' % len(data))
-        hdr = "%s,%r," % (peer[0], peer[1])
-        self.mux.send(self.chan, ssnet.CMD_UDP_DATA, hdr + data)
-
-
-def main():
-    if helpers.verbose >= 1:
-        helpers.logprefix = ' s: '
-    else:
-        helpers.logprefix = 'server: '
-    assert latency_control is not None
-    debug1('latency control setting = %r\n' % latency_control)
-
-    routes = list(list_routes())
-    debug1('available routes:\n')
-    for r in routes:
-        debug1('  %d/%s/%d\n' % r)
-
-    # synchronization header
-    sys.stdout.write('\0\0SSHUTTLE0001')
-    sys.stdout.flush()
-
-    handlers = []
-    mux = Mux(socket.fromfd(sys.stdin.fileno(),
-                            socket.AF_INET, socket.SOCK_STREAM),
-              socket.fromfd(sys.stdout.fileno(),
-                            socket.AF_INET, socket.SOCK_STREAM))
-    handlers.append(mux)
-    routepkt = ''
-    for r in routes:
-        routepkt += '%d,%s,%d\n' % r
-    mux.send(0, ssnet.CMD_ROUTES, routepkt)
-
-    hw = Hostwatch()
-    hw.leftover = ''
-
-    def hostwatch_ready():
-        assert(hw.pid)
-        content = hw.sock.recv(4096)
-        if content:
-            lines = (hw.leftover + content).split('\n')
-            if lines[-1]:
-                # no terminating newline: entry isn't complete yet!
-                hw.leftover = lines.pop()
-                lines.append('')
-            else:
-                hw.leftover = ''
-            mux.send(0, ssnet.CMD_HOST_LIST, '\n'.join(lines))
-        else:
-            raise Fatal('hostwatch process died')
-
-    def got_host_req(data):
-        if not hw.pid:
-            (hw.pid, hw.sock) = start_hostwatch(data.strip().split())
-            handlers.append(Handler(socks=[hw.sock],
-                                    callback=hostwatch_ready))
-    mux.got_host_req = got_host_req
-
-    def new_channel(channel, data):
-        (family, dstip, dstport) = data.split(',', 2)
-        family = int(family)
-        dstport = int(dstport)
-        outwrap = ssnet.connect_dst(family, dstip, dstport)
-        handlers.append(Proxy(MuxWrapper(mux, channel), outwrap))
-    mux.new_channel = new_channel
-
-    dnshandlers = {}
-
-    def dns_req(channel, data):
-        debug2('Incoming DNS request channel=%d.\n' % channel)
-        h = DnsProxy(mux, channel, data)
-        handlers.append(h)
-        dnshandlers[channel] = h
-    mux.got_dns_req = dns_req
-
-    udphandlers = {}
-
-    def udp_req(channel, cmd, data):
-        debug2('Incoming UDP request channel=%d, cmd=%d\n' % (channel, cmd))
-        if cmd == ssnet.CMD_UDP_DATA:
-            (dstip, dstport, data) = data.split(",", 2)
-            dstport = int(dstport)
-            debug2('is incoming UDP data. %r %d.\n' % (dstip, dstport))
-            h = udphandlers[channel]
-            h.send((dstip, dstport), data)
-        elif cmd == ssnet.CMD_UDP_CLOSE:
-            debug2('is incoming UDP close\n')
-            h = udphandlers[channel]
-            h.ok = False
-            del mux.channels[channel]
-
-    def udp_open(channel, data):
-        debug2('Incoming UDP open.\n')
-        family = int(data)
-        mux.channels[channel] = lambda cmd, data: udp_req(channel, cmd, data)
-        if channel in udphandlers:
-            raise Fatal('UDP connection channel %d already open' % channel)
-        else:
-            h = UdpProxy(mux, channel, family)
-            handlers.append(h)
-            udphandlers[channel] = h
-    mux.got_udp_open = udp_open
-
-    while mux.ok:
-        if hw.pid:
-            assert(hw.pid > 0)
-            (rpid, rv) = os.waitpid(hw.pid, os.WNOHANG)
-            if rpid:
-                raise Fatal(
-                    'hostwatch exited unexpectedly: code 0x%04x\n' % rv)
-
-        ssnet.runonce(handlers, mux)
-        if latency_control:
-            mux.check_fullness()
-        mux.callback()
-
-        if dnshandlers:
-            now = time.time()
-            for channel, h in dnshandlers.items():
-                if h.timeout < now or not h.ok:
-                    debug3('expiring dnsreqs channel=%d\n' % channel)
-                    del dnshandlers[channel]
-                    h.ok = False
-            for channel, h in udphandlers.items():
-                if not h.ok:
-                    debug3('expiring UDP channel=%d\n' % channel)
-                    del udphandlers[channel]
-                    h.ok = False

src/ssh.py

@@ -1,104 +0,0 @@
-import sys
-import os
-import re
-import socket
-import zlib
-import compat.ssubprocess as ssubprocess
-import helpers
-from helpers import debug2
-
-
-def readfile(name):
-    basedir = os.path.dirname(os.path.abspath(sys.argv[0]))
-    path = [basedir] + sys.path
-    for d in path:
-        fullname = os.path.join(d, name)
-        if os.path.exists(fullname):
-            return open(fullname, 'rb').read()
-    raise Exception("can't find file %r in any of %r" % (name, path))
-
-
-def empackage(z, filename, data=None):
-    (path, basename) = os.path.split(filename)
-    if not data:
-        data = readfile(filename)
-    content = z.compress(data)
-    content += z.flush(zlib.Z_SYNC_FLUSH)
-    return '%s\n%d\n%s' % (basename, len(content), content)
-
-
-def connect(ssh_cmd, rhostport, python, stderr, options):
-    portl = []
-
-    if (rhostport or '').count(':') > 1:
-        if rhostport.count(']') or rhostport.count('['):
-            result = rhostport.split(']')
-            rhost = result[0].strip('[')
-            if len(result) > 1:
-                result[1] = result[1].strip(':')
-                if result[1] is not '':
-                    portl = ['-p', str(int(result[1]))]
-        # can't disambiguate IPv6 colons and a port number. pass the hostname
-        # through.
-        else:
-            rhost = rhostport
-    else:  # IPv4
-        l = (rhostport or '').split(':', 1)
-        rhost = l[0]
-        if len(l) > 1:
-            portl = ['-p', str(int(l[1]))]
-
-    if rhost == '-':
-        rhost = None
-
-    z = zlib.compressobj(1)
-    content = readfile('assembler.py')
-    optdata = ''.join("%s=%r\n" % (k, v) for (k, v) in options.items())
-    content2 = (empackage(z, 'cmdline_options.py', optdata) +
-                empackage(z, 'helpers.py') +
-                empackage(z, 'compat/ssubprocess.py') +
-                empackage(z, 'ssnet.py') +
-                empackage(z, 'hostwatch.py') +
-                empackage(z, 'server.py') +
-                "\n")
-
-    pyscript = r"""
-                import sys;
-                skip_imports=1;
-                verbosity=%d;
-                exec compile(sys.stdin.read(%d), "assembler.py", "exec")
-                """ % (helpers.verbose or 0, len(content))
-    pyscript = re.sub(r'\s+', ' ', pyscript.strip())
-
-    if not rhost:
-        # ignore the --python argument when running locally; we already know
-        # which python version works.
-        argv = [sys.argv[1], '-c', pyscript]
-    else:
-        if ssh_cmd:
-            sshl = ssh_cmd.split(' ')
-        else:
-            sshl = ['ssh']
-        if python:
-            pycmd = "'%s' -c '%s'" % (python, pyscript)
-        else:
-            pycmd = ("P=python2; $P -V 2>/dev/null || P=python; "
-                     "exec \"$P\" -c '%s'") % pyscript
-        argv = (sshl +
-                portl +
-                [rhost, '--', pycmd])
-    (s1, s2) = socket.socketpair()
-
-    def setup():
-        # runs in the child process
-        s2.close()
-    s1a, s1b = os.dup(s1.fileno()), os.dup(s1.fileno())
-    s1.close()
-    debug2('executing: %r\n' % argv)
-    p = ssubprocess.Popen(argv, stdin=s1a, stdout=s1b, preexec_fn=setup,
-                          close_fds=True, stderr=stderr)
-    os.close(s1a)
-    os.close(s1b)
-    s2.sendall(content)
-    s2.sendall(content2)
-    return p, s2

src/sshuttle

@@ -1,12 +0,0 @@
-#!/bin/sh
-EXE=$0
-for i in 1 2 3 4 5 6 7 8 9 10; do
-	[ -L "$EXE" ] || break
-	EXE=$(readlink "$EXE")
-done
-DIR=$(dirname "$EXE")
-if python2 -V 2>/dev/null; then
-	exec python2 "$DIR/main.py" python2 "$@"
-else
-	exec python "$DIR/main.py" python "$@"
-fi

src/sshuttle.md

@@ -1,284 +0,0 @@
-% sshuttle(8) Sshuttle 0.46
-% Avery Pennarun <apenwarr@gmail.com>
-% 2011-01-25
-
-# NAME
-
-sshuttle - a transparent proxy-based VPN using ssh
-
-# SYNOPSIS
-
-sshuttle [options...] [-r [username@]sshserver[:port]] \<subnets...\>
-
-
-# DESCRIPTION
-
-sshuttle allows you to create a VPN connection from your
-machine to any remote server that you can connect to via
-ssh, as long as that server has python 2.3 or higher.
-
-To work, you must have root access on the local machine,
-but you can have a normal account on the server.
-
-It's valid to run sshuttle more than once simultaneously on
-a single client machine, connecting to a different server
-every time, so you can be on more than one VPN at once.
-
-If run on a router, sshuttle can forward traffic for your
-entire subnet to the VPN.
-
-
-# OPTIONS
-
-\<subnets...\>
-:   a list of subnets to route over the VPN, in the form
-    `a.b.c.d[/width]`.  Valid examples are 1.2.3.4 (a
-    single IP address), 1.2.3.4/32 (equivalent to 1.2.3.4),
-    1.2.3.0/24 (a 24-bit subnet, ie. with a 255.255.255.0
-    netmask), and 0/0 ('just route everything through the
-    VPN').
-
--l, --listen=*[ip:]port*
-:   use this ip address and port number as the transparent
-    proxy port.  By default sshuttle finds an available
-    port automatically and listens on IP 127.0.0.1
-    (localhost), so you don't need to override it, and
-    connections are only proxied from the local machine,
-    not from outside machines.  If you want to accept
-    connections from other machines on your network (ie. to
-    run sshuttle on a router) try enabling IP Forwarding in
-    your kernel, then using `--listen 0.0.0.0:0`.
-
--H, --auto-hosts
-:   scan for remote hostnames and update the local /etc/hosts
-    file with matching entries for as long as the VPN is
-    open.  This is nicer than changing your system's DNS
-    (/etc/resolv.conf) settings, for several reasons.  First,
-    hostnames are added without domain names attached, so
-    you can `ssh thatserver` without worrying if your local
-    domain matches the remote one.  Second, if you sshuttle
-    into more than one VPN at a time, it's impossible to
-    use more than one DNS server at once anyway, but
-    sshuttle correctly merges /etc/hosts entries between
-    all running copies.  Third, if you're only routing a
-    few subnets over the VPN, you probably would prefer to
-    keep using your local DNS server for everything else.
-
--N, --auto-nets
-:   in addition to the subnets provided on the command
-    line, ask the server which subnets it thinks we should
-    route, and route those automatically.  The suggestions
-    are taken automatically from the server's routing
-    table.
-
---dns
-:   capture local DNS requests and forward to the remote DNS
-    server.
-
---python
-:   specify the name/path of the remote python interpreter.
-    The default is just `python`, which means to use the
-    default python interpreter on the remote system's PATH.
-
--r, --remote=*[username@]sshserver[:port]*
-:   the remote hostname and optional username and ssh
-    port number to use for connecting to the remote server.
-    For example, example.com, testuser@example.com,
-    testuser@example.com:2222, or example.com:2244.
-
--x, --exclude=*subnet*
-:   explicitly exclude this subnet from forwarding.  The
-    format of this option is the same as the `<subnets>`
-    option.  To exclude more than one subnet, specify the
-    `-x` option more than once.  You can say something like
-    `0/0 -x 1.2.3.0/24` to forward everything except the
-    local subnet over the VPN, for example.
-
--X, --exclude-from=*file*
-:   exclude the subnets specified in a file, one subnet per
-    line. Useful when you have lots of subnets to exclude.
-
--v, --verbose
-:   print more information about the session.  This option
-    can be used more than once for increased verbosity.  By
-    default, sshuttle prints only error messages.
-
--e, --ssh-cmd
-:   the command to use to connect to the remote server. The
-    default is just `ssh`.  Use this if your ssh client is
-    in a non-standard location or you want to provide extra
-    options to the ssh command, for example, `-e 'ssh -v'`.
-
---seed-hosts
-:   a comma-separated list of hostnames to use to
-    initialize the `--auto-hosts` scan algorithm.
-    `--auto-hosts` does things like poll local SMB servers
-    for lists of local hostnames, but can speed things up
-    if you use this option to give it a few names to start
-    from.
-
---no-latency-control
-:   sacrifice latency to improve bandwidth benchmarks. ssh
-    uses really big socket buffers, which can overload the
-    connection if you start doing large file transfers,
-    thus making all your other sessions inside the same
-    tunnel go slowly. Normally, sshuttle tries to avoid
-    this problem using a "fullness check" that allows only
-    a certain amount of outstanding data to be buffered at
-    a time.  But on high-bandwidth links, this can leave a
-    lot of your bandwidth underutilized.  It also makes
-    sshuttle seem slow in bandwidth benchmarks (benchmarks
-    rarely test ping latency, which is what sshuttle is
-    trying to control).  This option disables the latency
-    control feature, maximizing bandwidth usage.  Use at
-    your own risk.
-
--D, --daemon
-:   automatically fork into the background after connecting
-    to the remote server.  Implies `--syslog`.
-
---syslog
-:   after connecting, send all log messages to the
-    `syslog`(3) service instead of stderr.  This is
-    implicit if you use `--daemon`.
-
---pidfile=*pidfilename*
-:   when using `--daemon`, save sshuttle's pid to
-    *pidfilename*.  The default is `sshuttle.pid` in the
-    current directory.
-
---server
-:   (internal use only) run the sshuttle server on
-    stdin/stdout.  This is what the client runs on
-    the remote end.
-
---firewall
-:   (internal use only) run the firewall manager.  This is
-    the only part of sshuttle that must run as root.  If
-    you start sshuttle as a non-root user, it will
-    automatically run `sudo` or `su` to start the firewall
-    manager, but the core of sshuttle still runs as a
-    normal user.
-
---hostwatch
-:   (internal use only) run the hostwatch daemon.  This
-    process runs on the server side and collects hostnames for
-    the `--auto-hosts` option.  Using this option by itself
-    makes it a lot easier to debug and test the `--auto-hosts`
-    feature.
-
-
-# EXAMPLES
-
-Test locally by proxying all local connections, without using ssh:
-
-    $ sshuttle -v 0/0
-
-    Starting sshuttle proxy.
-    Listening on ('0.0.0.0', 12300).
-    [local sudo] Password:
-    firewall manager ready.
-    c : connecting to server...
-     s: available routes:
-     s:   192.168.42.0/24
-    c : connected.
-    firewall manager: starting transproxy.
-    c : Accept: 192.168.42.106:50035 -> 192.168.42.121:139.
-    c : Accept: 192.168.42.121:47523 -> 77.141.99.22:443.
-        ...etc...
-    ^C
-    firewall manager: undoing changes.
-    KeyboardInterrupt
-    c : Keyboard interrupt: exiting.
-    c : SW#8:192.168.42.121:47523: deleting
-    c : SW#6:192.168.42.106:50035: deleting
-
-Test connection to a remote server, with automatic hostname
-and subnet guessing:
-
-    $ sshuttle -vNHr example.org
-
-    Starting sshuttle proxy.
-    Listening on ('0.0.0.0', 12300).
-    firewall manager ready.
-    c : connecting to server...
-     s: available routes:
-     s:   77.141.99.0/24
-    c : connected.
-    c : seed_hosts: []
-    firewall manager: starting transproxy.
-    hostwatch: Found: testbox1: 1.2.3.4
-    hostwatch: Found: mytest2: 5.6.7.8
-    hostwatch: Found: domaincontroller: 99.1.2.3
-    c : Accept: 192.168.42.121:60554 -> 77.141.99.22:22.
-    ^C
-    firewall manager: undoing changes.
-    c : Keyboard interrupt: exiting.
-    c : SW#6:192.168.42.121:60554: deleting
-
-
-# DISCUSSION
-
-When it starts, sshuttle creates an ssh session to the
-server specified by the `-r` option.  If `-r` is omitted,
-it will start both its client and server locally, which is
-sometimes useful for testing.
-
-After connecting to the remote server, sshuttle uploads its
-(python) source code to the remote end and executes it
-there.  Thus, you don't need to install sshuttle on the
-remote server, and there are never sshuttle version
-conflicts between client and server.
-
-Unlike most VPNs, sshuttle forwards sessions, not packets.
-That is, it uses kernel transparent proxying (`iptables
-REDIRECT` rules on Linux, or `ipfw fwd` rules on BSD) to
-capture outgoing TCP sessions, then creates entirely
-separate TCP sessions out to the original destination at
-the other end of the tunnel.
-
-Packet-level forwarding (eg. using the tun/tap devices on
-Linux) seems elegant at first, but it results in
-several problems, notably the 'tcp over tcp' problem.  The
-tcp protocol depends fundamentally on packets being dropped
-in order to implement its congestion control agorithm; if
-you pass tcp packets through a tcp-based tunnel (such as
-ssh), the inner tcp packets will never be dropped, and so
-the inner tcp stream's congestion control will be
-completely broken, and performance will be terrible.  Thus,
-packet-based VPNs (such as IPsec and openvpn) cannot use
-tcp-based encrypted streams like ssh or ssl, and have to
-implement their own encryption from scratch, which is very
-complex and error prone.
-
-sshuttle's simplicity comes from the fact that it can
-safely use the existing ssh encrypted tunnel without
-incurring a performance penalty.  It does this by letting
-the client-side kernel manage the incoming tcp stream, and
-the server-side kernel manage the outgoing tcp stream;
-there is no need for congestion control to be shared
-between the two separate streams, so a tcp-based tunnel is
-fine.
-
-
-# BUGS
-
-On MacOS 10.6 (at least up to 10.6.6), your network will
-stop responding about 10 minutes after the first time you
-start sshuttle, because of a MacOS kernel bug relating to
-arp and the net.inet.ip.scopedroute sysctl.  To fix it,
-just switch your wireless off and on. Sshuttle makes the
-kernel setting it changes permanent, so this won't happen
-again, even after a reboot.
-
-On MacOS, sshuttle will set the kernel boot flag
-net.inet.ip.scopedroute to 0, which interferes with OS X
-Internet Sharing and some VPN clients. To reset this flag,
-you can remove any reference to net.inet.ip.scopedroute from
-/Library/Preferences/SystemConfiguration/com.apple.Boot.plist
-and reboot.
-
-
-# SEE ALSO
-
-`ssh`(1), `python`(1)

src/ssyslog.py

@@ -1,19 +0,0 @@
-import sys
-import os
-from compat import ssubprocess
-
-
-_p = None
-
-
-def start_syslog():
-    global _p
-    _p = ssubprocess.Popen(['logger',
-                            '-p', 'daemon.notice',
-                            '-t', 'sshuttle'], stdin=ssubprocess.PIPE)
-
-
-def stderr_to_syslog():
-    sys.stdout.flush()
-    sys.stderr.flush()
-    os.dup2(_p.stdin.fileno(), 2)

src/stresstest.py

@@ -1,89 +0,0 @@
-#!/usr/bin/env python
-import socket
-import select
-import struct
-import time
-
-listener = socket.socket()
-listener.bind(('127.0.0.1', 0))
-listener.listen(500)
-
-servers = []
-clients = []
-remain = {}
-
-NUMCLIENTS = 50
-count = 0
-
-
-while 1:
-    if len(clients) < NUMCLIENTS:
-        c = socket.socket()
-        c.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
-        c.bind(('0.0.0.0', 0))
-        c.connect(listener.getsockname())
-        count += 1
-        if count >= 16384:
-            count = 1
-        print 'cli CREATING %d' % count
-        b = struct.pack('I', count) + 'x' * count
-        remain[c] = count
-        print 'cli  >> %r' % len(b)
-        c.send(b)
-        c.shutdown(socket.SHUT_WR)
-        clients.append(c)
-        r = [listener]
-        time.sleep(0.1)
-    else:
-        r = [listener] + servers + clients
-    print 'select(%d)' % len(r)
-    r, w, x = select.select(r, [], [], 5)
-    assert(r)
-    for i in r:
-        if i == listener:
-            s, addr = listener.accept()
-            servers.append(s)
-        elif i in servers:
-            b = i.recv(4096)
-            print 'srv <<  %r' % len(b)
-            if not i in remain:
-                assert(len(b) >= 4)
-                want = struct.unpack('I', b[:4])[0]
-                b = b[4:]
-                # i.send('y'*want)
-            else:
-                want = remain[i]
-            if want < len(b):
-                print 'weird wanted %d bytes, got %d: %r' % (want, len(b), b)
-                assert(want >= len(b))
-            want -= len(b)
-            remain[i] = want
-            if not b:  # EOF
-                if want:
-                    print 'weird: eof but wanted %d more' % want
-                    assert(want == 0)
-                i.close()
-                servers.remove(i)
-                del remain[i]
-            else:
-                print 'srv  >> %r' % len(b)
-                i.send('y' * len(b))
-                if not want:
-                    i.shutdown(socket.SHUT_WR)
-        elif i in clients:
-            b = i.recv(4096)
-            print 'cli <<  %r' % len(b)
-            want = remain[i]
-            if want < len(b):
-                print 'weird wanted %d bytes, got %d: %r' % (want, len(b), b)
-                assert(want >= len(b))
-            want -= len(b)
-            remain[i] = want
-            if not b:  # EOF
-                if want:
-                    print 'weird: eof but wanted %d more' % want
-                    assert(want == 0)
-                i.close()
-                clients.remove(i)
-                del remain[i]
-listener.accept()

src/ui-macos/.gitignore

@@ -1,8 +0,0 @@
-*.pyc
-*~
-/*.nib
-/debug.app
-/sources.list
-/Sshuttle VPN.app
-/*.tar.gz
-/*.zip

src/ui-macos/Info.plist

@@ -1,40 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>CFBundleDevelopmentRegion</key>
-	<string>English</string>
-	<key>CFBundleDisplayName</key>
-	<string>Sshuttle VPN</string>
-	<key>CFBundleExecutable</key>
-	<string>Sshuttle</string>
-	<key>CFBundleIconFile</key>
-	<string>app.icns</string>
-	<key>CFBundleIdentifier</key>
-	<string>ca.apenwarr.Sshuttle</string>
-	<key>CFBundleInfoDictionaryVersion</key>
-	<string>6.0</string>
-	<key>CFBundleName</key>
-	<string>Sshuttle VPN</string>
-	<key>CFBundlePackageType</key>
-	<string>APPL</string>
-	<key>CFBundleShortVersionString</key>
-	<string>0.0.0</string>
-	<key>CFBundleSignature</key>
-	<string>????</string>
-	<key>CFBundleVersion</key>
-	<string>0.0.0</string>
-	<key>LSUIElement</key>
-	<string>1</string>
-	<key>LSHasLocalizedDisplayName</key>
-	<false/>
-	<key>NSAppleScriptEnabled</key>
-	<false/>
-	<key>NSHumanReadableCopyright</key>
-	<string>GNU LGPL Version 2</string>
-	<key>NSMainNibFile</key>
-	<string>MainMenu</string>
-	<key>NSPrincipalClass</key>
-	<string>NSApplication</string>
-</dict>
-</plist>

src/ui-macos/UserDefaults.plist

@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>startAtLogin</key>
-	<false/>
-	<key>autoReconnect</key>
-	<true/>
-</dict>
-</plist>

src/ui-macos/all.do

@@ -1 +0,0 @@
-redo-ifchange debug.app dist

src/ui-macos/askpass.py

@@ -1,30 +0,0 @@
-import re
-import subprocess
-
-
-def askpass(prompt):
-    prompt = prompt.replace('"', "'")
-
-    if 'yes/no' in prompt:
-        return "yes"
-
-    script = """
-        tell application "Finder"
-            activate
-            display dialog "%s" \
-              with title "Sshuttle SSH Connection" \
-              default answer "" \
-              with icon caution \
-              with hidden answer
-        end tell
-    """ % prompt
-
-    p = subprocess.Popen(['osascript', '-e', script], stdout=subprocess.PIPE)
-    out = p.stdout.read()
-    rv = p.wait()
-    if rv:
-        return None
-    g = re.match("text returned:(.*), button returned:.*", out)
-    if not g:
-        return None
-    return g.group(1)

src/ui-macos/bits/.gitignore

@@ -1 +0,0 @@
-/runpython

src/ui-macos/bits/PkgInfo

@@ -1 +0,0 @@
-APPL????

src/ui-macos/bits/runpython.c

@@ -1,23 +0,0 @@
-/*
- * This rather pointless program acts like the python interpreter, except
- * it's intended to sit inside a MacOS .app package, so that its argv[0]
- * will point inside the package.
- *
- * NSApplicationMain() looks for Info.plist using the path in argv[0], which
- * goes wrong if your interpreter is /usr/bin/python.
- */
-#include <Python/Python.h>
-#include <string.h>
-#include <unistd.h>
-
-int main(int argc, char **argv)
-{
-    char *path = strdup(argv[0]), *cptr;
-    char *args[] = {argv[0], "../Resources/main.py", NULL};
-    cptr = strrchr(path, '/');
-    if (cptr)
-	*cptr = 0;
-    chdir(path);
-    free(path);
-    return Py_Main(2, args);
-}

src/ui-macos/bits/runpython.do

@@ -1,20 +0,0 @@
-exec >&2
-redo-ifchange runpython.c
-ARCHES=""
-printf "Platforms: "
-if [ -d /usr/libexec/gcc/darwin ]; then
-    for d in /usr/libexec/gcc/darwin/*; do
-        PLAT=$(basename "$d")
-        [ "$PLAT" != "ppc64" ] || continue  # fails for some reason on my Mac
-        ARCHES="$ARCHES -arch $PLAT"
-        printf "$PLAT "
-    done
-fi
-printf "\n"
-PYTHON_LDFLAGS=$(python-config --ldflags)
-PYTHON_INCLUDES=$(python-config --includes)
-gcc $ARCHES \
-    -Wall -o $3 runpython.c \
-    $PYTHON_INCLUDES \
-    $PYTHON_LDFLAGS \
-    -framework Python

src/ui-macos/clean.do

@@ -1,4 +0,0 @@
-exec >&2
-find . -name '*~' | xargs rm -f
-rm -rf *.app *.zip *.tar.gz
-rm -f bits/runpython *.nib sources.list

src/ui-macos/debug.app.do

@@ -1,15 +0,0 @@
-redo-ifchange bits/runpython MainMenu.nib
-rm -rf debug.app
-mkdir debug.app debug.app/Contents
-cd debug.app/Contents
-ln -s ../.. Resources
-ln -s ../.. English.lproj
-ln -s ../../Info.plist .
-ln -s ../../app.icns .
-
-mkdir MacOS
-cd MacOS
-ln -s ../../../bits/runpython Sshuttle
-
-cd ../../..
-redo-ifchange $(find debug.app -type f)

src/ui-macos/default.app.do

@@ -1,28 +0,0 @@
-TOP=$PWD
-redo-ifchange sources.list
-redo-ifchange Info.plist bits/runpython \
-	$(while read name newname; do echo "$name"; done <sources.list)
-
-rm -rf "$2.app"
-mkdir "$2.app" "$2.app/Contents"
-cd "$2.app/Contents"
-
-cp "$TOP/Info.plist" .
-
-mkdir MacOS
-cp "$TOP/bits/runpython" MacOS/Sshuttle
-
-mkdir Resources
-
-cd "$TOP"
-while read name newname; do
-	[ -z "$name" ] && continue
-	: "${newname:=$name}"
-	outname=$2.app/Contents/Resources/$newname
-	outdir=$(dirname "$outname")
-	[ -d "$outdir" ] || mkdir "$outdir"
-	cp "${name-$newname}" "$outname"
-done <sources.list
-
-cd "$2.app"
-redo-ifchange $(find . -type f)

src/ui-macos/default.app.tar.gz.do

@@ -1,5 +0,0 @@
-exec >&2
-IFS="
-"
-redo-ifchange $2.app
-tar -czf $3 $2.app/

src/ui-macos/default.app.zip.do

@@ -1,5 +0,0 @@
-exec >&2
-IFS="
-"
-redo-ifchange $2.app
-zip -q -r $3 $2.app/

src/ui-macos/default.nib.do

@@ -1,2 +0,0 @@
-redo-ifchange $2.xib
-ibtool --compile $3 $2.xib

src/ui-macos/dist.do

@@ -1 +0,0 @@
-redo-ifchange "Sshuttle VPN.app.zip" "Sshuttle VPN.app.tar.gz"

src/ui-macos/git-export.do

@@ -1,19 +0,0 @@
-# update a local branch with pregenerated output files, so people can download
-# the completed tarballs from github.  Since we don't have any real binaries,
-# our final distribution package contains mostly blobs from the source code,
-# so this doesn't cost us much extra space in the repo.
-BRANCH=dist/macos
-redo-ifchange 'Sshuttle VPN.app'
-git update-ref refs/heads/$BRANCH origin/$BRANCH '' 2>/dev/null || true
-
-export GIT_INDEX_FILE=$PWD/gitindex.tmp
-rm -f "$GIT_INDEX_FILE"
-git add -f 'Sshuttle VPN.app'
-
-MSG="MacOS precompiled app package for $(git describe)"
-TREE=$(git write-tree --prefix=ui-macos)
-git show-ref refs/heads/$BRANCH >/dev/null && PARENT="-p refs/heads/$BRANCH"
-COMMITID=$(echo "$MSG" | git commit-tree $TREE $PARENT)
-
-git update-ref refs/heads/$BRANCH $COMMITID
-rm -f "$GIT_INDEX_FILE"

src/ui-macos/main.py

@@ -1,387 +0,0 @@
-import sys
-import os
-import pty
-from AppKit import *
-import my
-import models
-import askpass
-
-
-def sshuttle_args(host, auto_nets, auto_hosts, dns, nets, debug,
-                  no_latency_control):
-    argv = [my.bundle_path('sshuttle/sshuttle', ''), '-r', host]
-    assert(argv[0])
-    if debug:
-        argv.append('-v')
-    if auto_nets:
-        argv.append('--auto-nets')
-    if auto_hosts:
-        argv.append('--auto-hosts')
-    if dns:
-        argv.append('--dns')
-    if no_latency_control:
-        argv.append('--no-latency-control')
-    argv += nets
-    return argv
-
-
-class _Callback(NSObject):
-
-    def initWithFunc_(self, func):
-        self = super(_Callback, self).init()
-        self.func = func
-        return self
-
-    def func_(self, obj):
-        return self.func(obj)
-
-
-class Callback:
-
-    def __init__(self, func):
-        self.obj = _Callback.alloc().initWithFunc_(func)
-        self.sel = self.obj.func_
-
-
-class Runner:
-
-    def __init__(self, argv, logfunc, promptfunc, serverobj):
-        print 'in __init__'
-        self.id = argv
-        self.rv = None
-        self.pid = None
-        self.fd = None
-        self.logfunc = logfunc
-        self.promptfunc = promptfunc
-        self.serverobj = serverobj
-        self.buf = ''
-        self.logfunc('\nConnecting to %s.\n' % self.serverobj.host())
-        print 'will run: %r' % argv
-        self.serverobj.setConnected_(False)
-        pid, fd = pty.fork()
-        if pid == 0:
-            # child
-            try:
-                os.execvp(argv[0], argv)
-            except Exception, e:
-                sys.stderr.write('failed to start: %r\n' % e)
-                raise
-            finally:
-                os._exit(42)
-        # parent
-        self.pid = pid
-        self.file = NSFileHandle.alloc()\
-            .initWithFileDescriptor_closeOnDealloc_(fd, True)
-        self.cb = Callback(self.gotdata)
-        NSNotificationCenter.defaultCenter()\
-            .addObserver_selector_name_object_(
-                self.cb.obj, self.cb.sel,
-                NSFileHandleDataAvailableNotification, self.file)
-        self.file.waitForDataInBackgroundAndNotify()
-
-    def __del__(self):
-        self.wait()
-
-    def _try_wait(self, options):
-        if self.rv is None and self.pid > 0:
-            pid, code = os.waitpid(self.pid, options)
-            if pid == self.pid:
-                if os.WIFEXITED(code):
-                    self.rv = os.WEXITSTATUS(code)
-                else:
-                    self.rv = -os.WSTOPSIG(code)
-                self.serverobj.setConnected_(False)
-                self.serverobj.setError_('VPN process died')
-                self.logfunc('Disconnected.\n')
-        print 'wait_result: %r' % self.rv
-        return self.rv
-
-    def wait(self):
-        rv = None
-        while rv is None:
-            self.gotdata(None)
-            rv = self._try_wait(os.WNOHANG)
-
-    def poll(self):
-        return self._try_wait(os.WNOHANG)
-
-    def kill(self):
-        assert(self.pid > 0)
-        print 'killing: pid=%r rv=%r' % (self.pid, self.rv)
-        if self.rv is None:
-            self.logfunc('Disconnecting from %s.\n' % self.serverobj.host())
-            os.kill(self.pid, 15)
-            self.wait()
-
-    def gotdata(self, notification):
-        print 'gotdata!'
-        d = str(self.file.availableData())
-        if d:
-            self.logfunc(d)
-            self.buf = self.buf + d
-            if 'Connected.\r\n' in self.buf:
-                self.serverobj.setConnected_(True)
-            self.buf = self.buf[-4096:]
-            if self.buf.strip().endswith(':'):
-                lastline = self.buf.rstrip().split('\n')[-1]
-                resp = self.promptfunc(lastline)
-                add = ' (response)\n'
-                self.buf += add
-                self.logfunc(add)
-                self.file.writeData_(my.Data(resp + '\n'))
-            self.file.waitForDataInBackgroundAndNotify()
-        self.poll()
-        # print 'gotdata done!'
-
-
-class SshuttleApp(NSObject):
-
-    def initialize(self):
-        d = my.PList('UserDefaults')
-        my.Defaults().registerDefaults_(d)
-
-
-class SshuttleController(NSObject):
-    # Interface builder outlets
-    startAtLoginField = objc.IBOutlet()
-    autoReconnectField = objc.IBOutlet()
-    debugField = objc.IBOutlet()
-    routingField = objc.IBOutlet()
-    prefsWindow = objc.IBOutlet()
-    serversController = objc.IBOutlet()
-    logField = objc.IBOutlet()
-    latencyControlField = objc.IBOutlet()
-
-    servers = []
-    conns = {}
-
-    def _connect(self, server):
-        host = server.host()
-        print 'connecting %r' % host
-        self.fill_menu()
-
-        def logfunc(msg):
-            print 'log! (%d bytes)' % len(msg)
-            self.logField.textStorage()\
-                .appendAttributedString_(NSAttributedString.alloc()
-                                         .initWithString_(msg))
-            self.logField.didChangeText()
-
-        def promptfunc(prompt):
-            print 'prompt! %r' % prompt
-            return askpass.askpass(prompt)
-        nets_mode = server.autoNets()
-        if nets_mode == models.NET_MANUAL:
-            manual_nets = ["%s/%d" % (i.subnet(), i.width())
-                           for i in server.nets()]
-        elif nets_mode == models.NET_ALL:
-            manual_nets = ['0/0']
-        else:
-            manual_nets = []
-        noLatencyControl = (server.latencyControl() != models.LAT_INTERACTIVE)
-        conn = Runner(sshuttle_args(host,
-                                    auto_nets=nets_mode == models.NET_AUTO,
-                                    auto_hosts=server.autoHosts(),
-                                    dns=server.useDns(),
-                                    nets=manual_nets,
-                                    debug=self.debugField.state(),
-                                    no_latency_control=noLatencyControl),
-                      logfunc=logfunc, promptfunc=promptfunc,
-                      serverobj=server)
-        self.conns[host] = conn
-
-    def _disconnect(self, server):
-        host = server.host()
-        print 'disconnecting %r' % host
-        conn = self.conns.get(host)
-        if conn:
-            conn.kill()
-        self.fill_menu()
-        self.logField.textStorage().setAttributedString_(
-            NSAttributedString.alloc().initWithString_(''))
-
-    @objc.IBAction
-    def cmd_connect(self, sender):
-        server = sender.representedObject()
-        server.setWantConnect_(True)
-
-    @objc.IBAction
-    def cmd_disconnect(self, sender):
-        server = sender.representedObject()
-        server.setWantConnect_(False)
-
-    @objc.IBAction
-    def cmd_show(self, sender):
-        self.prefsWindow.makeKeyAndOrderFront_(self)
-        NSApp.activateIgnoringOtherApps_(True)
-
-    @objc.IBAction
-    def cmd_quit(self, sender):
-        NSApp.performSelector_withObject_afterDelay_(NSApp.terminate_,
-                                                     None, 0.0)
-
-    def fill_menu(self):
-        menu = self.menu
-        menu.removeAllItems()
-
-        def additem(name, func, obj):
-            it = menu.addItemWithTitle_action_keyEquivalent_(name, None, "")
-            it.setRepresentedObject_(obj)
-            it.setTarget_(self)
-            it.setAction_(func)
-
-        def addnote(name):
-            additem(name, None, None)
-
-        any_inprogress = None
-        any_conn = None
-        any_err = None
-        if len(self.servers):
-            for i in self.servers:
-                host = i.host()
-                title = i.title()
-                want = i.wantConnect()
-                connected = i.connected()
-                numnets = len(list(i.nets()))
-                if not host:
-                    additem('Connect Untitled', None, i)
-                elif i.autoNets() == models.NET_MANUAL and not numnets:
-                    additem('Connect %s (no routes)' % host, None, i)
-                elif want:
-                    any_conn = i
-                    additem('Disconnect %s' % title, self.cmd_disconnect, i)
-                else:
-                    additem('Connect %s' % title, self.cmd_connect, i)
-                if not want:
-                    msg = 'Off'
-                elif i.error():
-                    msg = 'ERROR - try reconnecting'
-                    any_err = i
-                elif connected:
-                    msg = 'Connected'
-                else:
-                    msg = 'Connecting...'
-                    any_inprogress = i
-                addnote('   State: %s' % msg)
-        else:
-            addnote('No servers defined yet')
-
-        menu.addItem_(NSMenuItem.separatorItem())
-        additem('Preferences...', self.cmd_show, None)
-        additem('Quit Sshuttle VPN', self.cmd_quit, None)
-
-        if any_err:
-            self.statusitem.setImage_(self.img_err)
-            self.statusitem.setTitle_('Error!')
-        elif any_conn:
-            self.statusitem.setImage_(self.img_running)
-            if any_inprogress:
-                self.statusitem.setTitle_('Connecting...')
-            else:
-                self.statusitem.setTitle_('')
-        else:
-            self.statusitem.setImage_(self.img_idle)
-            self.statusitem.setTitle_('')
-
-    def load_servers(self):
-        l = my.Defaults().arrayForKey_('servers') or []
-        sl = []
-        for s in l:
-            host = s.get('host', None)
-            if not host:
-                continue
-
-            nets = s.get('nets', [])
-            nl = []
-            for n in nets:
-                subnet = n[0]
-                width = n[1]
-                net = models.SshuttleNet.alloc().init()
-                net.setSubnet_(subnet)
-                net.setWidth_(width)
-                nl.append(net)
-
-            autoNets = s.get('autoNets', models.NET_AUTO)
-            autoHosts = s.get('autoHosts', True)
-            useDns = s.get('useDns', autoNets == models.NET_ALL)
-            latencyControl = s.get('latencyControl', models.LAT_INTERACTIVE)
-            srv = models.SshuttleServer.alloc().init()
-            srv.setHost_(host)
-            srv.setAutoNets_(autoNets)
-            srv.setAutoHosts_(autoHosts)
-            srv.setNets_(nl)
-            srv.setUseDns_(useDns)
-            srv.setLatencyControl_(latencyControl)
-            sl.append(srv)
-        self.serversController.addObjects_(sl)
-        self.serversController.setSelectionIndex_(0)
-
-    def save_servers(self):
-        l = []
-        for s in self.servers:
-            host = s.host()
-            if not host:
-                continue
-            nets = []
-            for n in s.nets():
-                subnet = n.subnet()
-                if not subnet:
-                    continue
-                nets.append((subnet, n.width()))
-            d = dict(host=s.host(),
-                     nets=nets,
-                     autoNets=s.autoNets(),
-                     autoHosts=s.autoHosts(),
-                     useDns=s.useDns(),
-                     latencyControl=s.latencyControl())
-            l.append(d)
-        my.Defaults().setObject_forKey_(l, 'servers')
-        self.fill_menu()
-
-    def awakeFromNib(self):
-        self.routingField.removeAllItems()
-        tf = self.routingField.addItemWithTitle_
-        tf('Send all traffic through this server')
-        tf('Determine automatically')
-        tf('Custom...')
-
-        self.latencyControlField.removeAllItems()
-        tf = self.latencyControlField.addItemWithTitle_
-        tf('Fast transfer')
-        tf('Low latency')
-
-        # Hmm, even when I mark this as !enabled in the .nib, it still comes
-        # through as enabled.  So let's just disable it here (since we don't
-        # support this feature yet).
-        self.startAtLoginField.setEnabled_(False)
-        self.startAtLoginField.setState_(False)
-        self.autoReconnectField.setEnabled_(False)
-        self.autoReconnectField.setState_(False)
-
-        self.load_servers()
-
-        # Initialize our menu item
-        self.menu = NSMenu.alloc().initWithTitle_('Sshuttle')
-        bar = NSStatusBar.systemStatusBar()
-        statusitem = bar.statusItemWithLength_(NSVariableStatusItemLength)
-        self.statusitem = statusitem
-        self.img_idle = my.Image('chicken-tiny-bw', 'png')
-        self.img_running = my.Image('chicken-tiny', 'png')
-        self.img_err = my.Image('chicken-tiny-err', 'png')
-        statusitem.setImage_(self.img_idle)
-        statusitem.setHighlightMode_(True)
-        statusitem.setMenu_(self.menu)
-        self.fill_menu()
-
-        models.configchange_callback = my.DelayedCallback(self.save_servers)
-
-        def sc(server):
-            if server.wantConnect():
-                self._connect(server)
-            else:
-                self._disconnect(server)
-        models.setconnect_callback = sc
-
-
-# Note: NSApplicationMain calls sys.exit(), so this never returns.
-NSApplicationMain(sys.argv)

src/ui-macos/models.py

@@ -1,189 +0,0 @@
-from AppKit import *
-import my
-
-
-configchange_callback = setconnect_callback = None
-objc_validator = objc.signature('@@:N^@o^@')
-
-
-def config_changed():
-    if configchange_callback:
-        configchange_callback()
-
-
-def _validate_ip(v):
-    parts = v.split('.')[:4]
-    if len(parts) < 4:
-        parts += ['0'] * (4 - len(parts))
-    for i in range(4):
-        n = my.atoi(parts[i])
-        if n < 0:
-            n = 0
-        elif n > 255:
-            n = 255
-        parts[i] = str(n)
-    return '.'.join(parts)
-
-
-def _validate_width(v):
-    n = my.atoi(v)
-    if n < 0:
-        n = 0
-    elif n > 32:
-        n = 32
-    return n
-
-
-class SshuttleNet(NSObject):
-
-    def subnet(self):
-        return getattr(self, '_k_subnet', None)
-
-    def setSubnet_(self, v):
-        self._k_subnet = v
-        config_changed()
-
-    @objc_validator
-    def validateSubnet_error_(self, value, error):
-        # print 'validateSubnet!'
-        return True, _validate_ip(value), error
-
-    def width(self):
-        return getattr(self, '_k_width', 24)
-
-    def setWidth_(self, v):
-        self._k_width = v
-        config_changed()
-
-    @objc_validator
-    def validateWidth_error_(self, value, error):
-        # print 'validateWidth!'
-        return True, _validate_width(value), error
-
-NET_ALL = 0
-NET_AUTO = 1
-NET_MANUAL = 2
-
-LAT_BANDWIDTH = 0
-LAT_INTERACTIVE = 1
-
-
-class SshuttleServer(NSObject):
-
-    def init(self):
-        self = super(SshuttleServer, self).init()
-        config_changed()
-        return self
-
-    def wantConnect(self):
-        return getattr(self, '_k_wantconnect', False)
-
-    def setWantConnect_(self, v):
-        self._k_wantconnect = v
-        self.setError_(None)
-        config_changed()
-        if setconnect_callback:
-            setconnect_callback(self)
-
-    def connected(self):
-        return getattr(self, '_k_connected', False)
-
-    def setConnected_(self, v):
-        print 'setConnected of %r to %r' % (self, v)
-        self._k_connected = v
-        if v:
-            self.setError_(None)  # connected ok, so no error
-        config_changed()
-
-    def error(self):
-        return getattr(self, '_k_error', None)
-
-    def setError_(self, v):
-        self._k_error = v
-        config_changed()
-
-    def isValid(self):
-        if not self.host():
-            return False
-        if self.autoNets() == NET_MANUAL and not len(list(self.nets())):
-            return False
-        return True
-
-    def title(self):
-        host = self.host()
-        if not host:
-            return host
-        an = self.autoNets()
-        suffix = ""
-        if an == NET_ALL:
-            suffix = " (all traffic)"
-        elif an == NET_MANUAL:
-            n = self.nets()
-            suffix = ' (%d subnet%s)' % (len(n), len(n) != 1 and 's' or '')
-        return self.host() + suffix
-
-    def setTitle_(self, v):
-        # title is always auto-generated
-        config_changed()
-
-    def host(self):
-        return getattr(self, '_k_host', None)
-
-    def setHost_(self, v):
-        self._k_host = v
-        self.setTitle_(None)
-        config_changed()
-
-    @objc_validator
-    def validateHost_error_(self, value, error):
-        # print 'validatehost! %r %r %r' % (self, value, error)
-        while value.startswith('-'):
-            value = value[1:]
-        return True, value, error
-
-    def nets(self):
-        return getattr(self, '_k_nets', [])
-
-    def setNets_(self, v):
-        self._k_nets = v
-        self.setTitle_(None)
-        config_changed()
-
-    def netsHidden(self):
-        # print 'checking netsHidden'
-        return self.autoNets() != NET_MANUAL
-
-    def setNetsHidden_(self, v):
-        config_changed()
-        # print 'setting netsHidden to %r' % v
-
-    def autoNets(self):
-        return getattr(self, '_k_autoNets', NET_AUTO)
-
-    def setAutoNets_(self, v):
-        self._k_autoNets = v
-        self.setNetsHidden_(-1)
-        self.setUseDns_(v == NET_ALL)
-        self.setTitle_(None)
-        config_changed()
-
-    def autoHosts(self):
-        return getattr(self, '_k_autoHosts', True)
-
-    def setAutoHosts_(self, v):
-        self._k_autoHosts = v
-        config_changed()
-
-    def useDns(self):
-        return getattr(self, '_k_useDns', False)
-
-    def setUseDns_(self, v):
-        self._k_useDns = v
-        config_changed()
-
-    def latencyControl(self):
-        return getattr(self, '_k_latencyControl', LAT_INTERACTIVE)
-
-    def setLatencyControl_(self, v):
-        self._k_latencyControl = v
-        config_changed()

src/ui-macos/my.py

@@ -1,64 +0,0 @@
-import os
-from AppKit import *
-import PyObjCTools.AppHelper
-
-
-def bundle_path(name, typ):
-    if typ:
-        return NSBundle.mainBundle().pathForResource_ofType_(name, typ)
-    else:
-        return os.path.join(NSBundle.mainBundle().resourcePath(), name)
-
-
-# Load an NSData using a python string
-def Data(s):
-    return NSData.alloc().initWithBytes_length_(s, len(s))
-
-
-# Load a property list from a file in the application bundle.
-def PList(name):
-    path = bundle_path(name, 'plist')
-    return NSDictionary.dictionaryWithContentsOfFile_(path)
-
-
-# Load an NSImage from a file in the application bundle.
-def Image(name, ext):
-    bytes = open(bundle_path(name, ext)).read()
-    img = NSImage.alloc().initWithData_(Data(bytes))
-    return img
-
-
-# Return the NSUserDefaults shared object.
-def Defaults():
-    return NSUserDefaults.standardUserDefaults()
-
-
-# Usage:
-#   f = DelayedCallback(func, args...)
-# later:
-#   f()
-#
-# When you call f(), it will schedule a call to func() next time the
-# ObjC event loop iterates.  Multiple calls to f() in a single iteration
-# will only result in one call to func().
-#
-def DelayedCallback(func, *args, **kwargs):
-    flag = [0]
-
-    def _go():
-        if flag[0]:
-            print 'running %r (flag=%r)' % (func, flag)
-            flag[0] = 0
-            func(*args, **kwargs)
-
-    def call():
-        flag[0] += 1
-        PyObjCTools.AppHelper.callAfter(_go)
-    return call
-
-
-def atoi(s):
-    try:
-        return int(s)
-    except ValueError:
-        return 0

src/ui-macos/run.do

@@ -1,4 +0,0 @@
-redo-ifchange debug.app
-exec >&2
-./debug.app/Contents/MacOS/Sshuttle
-

src/ui-macos/sources.list.do

@@ -1,14 +0,0 @@
-redo-always
-exec >$3
-cat <<-EOF
-	app.icns
-	MainMenu.nib English.lproj/MainMenu.nib
-	UserDefaults.plist
-	chicken-tiny.png
-	chicken-tiny-bw.png
-	chicken-tiny-err.png
-EOF
-for d in *.py sshuttle/*.py sshuttle/sshuttle sshuttle/compat/*.py; do
-	echo $d
-done
-redo-stamp <$3