Dependencies
============

Anytun can be built by using either libgcrypt, libnettle or the openssl-crypto
library. The latter is more performant in most cases but there are some license
issues when using this library.

Linux
-----
(this includes Debian with FreeBSD Kernel)

using libgcrypt:
  libgcrypt11-dev

using ssl crypto library:
  libssl-dev

using nettle crypto library:
  nettle-dev

common:
  build-essential
  libboost-serialization-dev
  libboost-thread-dev
  libboost-system-dev
  libboost-regex-dev

if you want clang as compiler
  clang

if you want to rebuild the manpage:
  asciidoc


Freebsd
-------

using libgcrypt:
   security/libgcrypt

using ssl crypto lib:
   <nothing here>

common:
   devel/boost (boost-libs on newer versions of the ports tree)
   devel/gmake

if you want to rebuild the manpage:
 textproc/asciidoc
 textproc/libxslt
 textproc/docbook-xsl
 sysutils/readlink
 misc/getopt



Windows
-------

 Crosscompiling with MinGW under Debian/Ubuntu:
 ----------------------------------------------

  # sudo apt-get install mingw-w64
  # cd contrib/
  # ./build-boost-mingw-cross.sh
  # ./build-openssl-mingw-cross.sh
  # ./build-anytun-mingw-cross.sh

  The compiled binaries can be found in anytun-w32 and anytun-w64 (32 and 64Bit).
  You can create a ZIP archive containing all needed files by calling:

  # ./make-mingw-release.sh


 Using MS Visual C++:
 --------------------
  OpenSSL
   Developer:
    http://www.slproweb.com/download/Win32OpenSSL-1_0_1h.exe

   Runtime Only:
    http://www.slproweb.com/download/Win32OpenSSL_Light-1_0_1h.exe

  Boost
    http://sourceforge.net/projects/boost/files/boost-binaries/

    As it can take some time to install everything from boost here is a
    complete list of libraries which have to be installed in order to build anytun:

     * Serialization
     * Thread
     * date_time
     * System
     * regex

  Microsoft Visual C++ 2008 Redistributable Package (x86):
    http://www.microsoft.com/downloads/details.aspx?familyid=9B2DA534-3E03-4391-8A4D-074B9F2BC1BF




Installation
============

Getting the source via GIT:
---------------------------

git clone https://git.spreadspace.org/anytun/anytun.git
cd anytun

Building from source
--------------------

using libgcrypt:

 # cd src
 # ./configure
 # make

using ssl crypto library:

 # cd src
 # ./configure --use-ssl-crypto
 # make


Notes:
  - try './configure --help' for further information
  - if using openssl pre 0.9.8 you have to disable passphrase
    because openssl had no SHA256 implementation prior to this
    version
  - on FreeBSD you have to use gmake instead of make
  - the FreeBSD port has some issues concering daemonizing and signal handling

Installing
----------

# sudo make install

This will install anytun under the --prefix defined with configure.


Uninstalling
------------

# sudo make remove

This removes everything except for the config files

# sudo make purge

This also removes the config files



Usage:
======

init.d script
-------------

The init.d script can be used to start anytun at boot time. It searches for
configuration files which reside at $CONFIG_DIR. For each instance of anytun
which should be started there must be a directory containing at least a file
named config. This file must contain all command line parameter which should
be used when starting the daemon. One line for each parameter. Empty lines and
lines starting with # are ignored. Besides the config file there may be a script
named post-up.sh which will be called when the tun/tap device comes up.
Furthermore there may be a directory called conf.d containing config files for
anytun-config. The syntax of this files is quite the same as those for anytun.
These files are used to configure a multi connection setup using anytun-config
and anytun-controld
This is an example of how the script can be used to start anytun:

# /etc/init.d/anytun start client1 p2p-a

In this case the script will start 2 instances of anytun using the config files
$CONFIG_DIR/client1/config and $CONFIG_DIR/p2p-a/config.
If no instance name is specified the script will use the file $CONFIG_DIR/autostart
to determine which instances to start or stop. This file must contain a list
of instance names which should be used when no names are specified at the command
line. One line for each name. Empty lines and lines starting with # are ignored.


systemd usage
-------------

Using the provided service units, anytun can now be started and managed via Systemd.
As with the init.d script, each VPN or anytun instance, identified by it's $vpnname,
 needs it's own configuration subdirectory. E.g.:  ${PREFIX}/etc/anytun/${vpnname}/.
For each such CLIENT instance, use the following command to enable it:

# systemctl enable anytun@${vpnname}.service

Manually start and stop instances by replacing enable with start or stop.


Errors:
=======

Note: Cannot open TUN/TAP dev /dev/net/tun: No such file or directory (errno=2)
Cannot open TUN/TAP dev /dev/anytun0: No such file or directory (errno=2)

Solution: Enabling tun/tap device
------------------------------------

modprobe tun
cd /dev
./MAKEDEV tun

edit /etc/modules and add the line
tun
to load the module automatically