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[[ChapterLibraries]]

== Library Reference

[[ChLibIntro]]

=== Introduction

Several libraries are needed to build and run Wireshark. Most of them
are split into three packages:

. 'Runtime'. System and third party libraries such as 'MSVCR110.dll' and 'libglib-2.0-0.dll'.

. 'Developer'. Documentation, header files, import libraries, and other files needed for compilation.

. 'Source'. Library sources, which are usually not required to
build Wireshark.

[TIP]
.Our libraries are freely available
====
All libraries required to build Wireshark on Windows are available for download at
https://anonsvn.wireshark.org/wireshark-win32-libs/trunk/packages/[] and
https://anonsvn.wireshark.org/wireshark-win64-libs/trunk/packages/[].
See <<ChLibsSetup>> for an easier way to install them.
====

[[ChLibsFormat]]

=== Binary library formats

Binary libraries are available in different formats, depending on the C
compiler used to build it and of course the platform they were built for.


[[ChLibsFormatUnix]]


==== Unix

If you have installed unix binary libraries on your system, they will
match the C compiler. If not already installed, the libraries should be
available as a package from the platform installer, or you can download
and compile the source and then install the binaries.


[[ChLibsFormatWin32]]


==== Win32: MSVC

Most of the Win32 binary libraries you will find on the web are in this
format. You will recognize MSVC libraries by the .lib/.dll file extension.


[[ChLibsFormatWin32Cygwin]]


==== Win32: cygwin gcc

Cygwin provides most of the required libraries (with file extension .a or .lib)
for Wireshark suitable for cygwin's gcc compiler.


[[ChLibsSetup]]


=== Win32: Automated library download

The required libraries (apart from Qt) are automatically downloaded as part of
the CMake generation step, and subsequently as required when libraries are updated.

The libraries are downloaded into the directory indicated by the environment
variable WIRESHARK_BASE_DIR, this must be set appropriately for your environment.
The libraries are downloaded and extracted into WIRESHARK_BASE_DIR\wireshark-win32-libs
and WIRESHARK_BASE_DIR\wireshark-win64-libs for 32 and 64 bit builds respectively.

You may also directly set the library directory with the environment variable
WIRESHARK_LIB_DIR, but if you switch between 32 bit and 64 bit builds, the value of this
must be set appropriately.

[[ChLibsQt]]

=== Qt

The Qt library is used to build the UI for Wireshark and is used to provide a
platform independant UI.
For more information on the Qt libraries, see <<ChUIQt>>.

[[ChLibsUnixQt]]

==== Unix

TBD.

[[ChLibsWin32Qt]]

==== Win32 MSVC

Qt5 must be installed maunally, from the Qt installers page
http://www.qt.io/download-open-source/#section-2[], using the version of Qt
appropriate for your compiler.  Note that separate installations (into different directories) of Qt
are required for 32 bit and 64 bit builds.  The environment variable QT5_BASE_DIR should be
set as appropriate for your environment and should point to the Qt directory that contains the
bin directory, e.g. C:\Qt\Qt5.5.0\5.5\msvc2013

[[ChLibsGtk]]

=== GTK+ / GLib / GDK / Pango / ATK / GNU gettext / GNU libiconv

The Glib library is used as a basic platform abstraction library, it's
not related to graphical user interface (GUI) things. For a detailed
description about GLib, see <<ChCodeGLib>>.

The GTK and its dependent libraries are used to build the older, deprecated, Wireshark GUI.
For a detailed description of the GTK libraries, see <<ChUIGTK>>.

All other libraries are dependent on the two libraries mentioned above,
you will typically not come in touch with these while doing Wireshark
development.

As the requirements for the GLib/GTK libraries have increased in the past,
the required additional libraries depend on the GLib/GTK versions you have.
The 2.x versions require all mentioned libs.

[[ChLibsUnixGTK]]

==== Unix

The GLib/GTK+ libraries are available for many unix-like platforms and
Cygwin.

If these libraries aren't already installed and also aren't available as a
package for your platform, you can get them at
http://www.gtk.org/download.html[].

[[ChLibsWin32GTK]]

==== Win32 MSVC

You can get the latest version at http://www.gtk.org/download.html[].

[[ChLibsSMI]]

=== SMI (optional)

LibSMI is used for MIB and PIB parsing and for OID resolution.

[[ChLibsUnixSMI]]

==== Unix

If this library isn't already installed or available as a
package for your platform, you can get it at
http://www.ibr.cs.tu-bs.de/projects/libsmi/[].

[[ChLibsWin32SMI]]

==== Win32 MSVC

Wireshark uses the source libSMI distribution at
http://www.ibr.cs.tu-bs.de/projects/libsmi/[].
LibSMI is cross-compiled using MinGW32. It's stored in the libsmi zip archive at
https://anonsvn.wireshark.org/wireshark-win32-libs/trunk/packages/[].

[[ChLibsCares]]

=== c-ares (optional)

C-Ares is used for asynchronous DNS resolution. This is the primary name
resolution library in Wireshark.

[[ChLibsUnixCares]]

==== Unix

If this library isn't already installed or available as a package for your
platform, you can get it at http://c-ares.haxx.se/[].

[[ChLibsWin32Cares]]

==== Win32 MSVC

C-Ares is cross-compiled using MinGW32 and is available at
https://anonsvn.wireshark.org/wireshark-win32-libs/trunk/packages/[].

[[ChLibsZlib]]

=== zlib (optional)

[quote, The zlib web site, http://www.zlib.net/]
____
zlib is designed to be a
http://www.gzip.org/zlib/zlib_license.html[free],
general-purpose, legally unencumbered -- that is, not covered by any
patents -- lossless data-compression library for use on virtually any computer
hardware and operating system.
____

[[ChLibsUnixZlib]]

==== Unix

This library is almost certain to be installed on your system. If it isn't or
you don't want to use the default library you can download it from
http://www.zlib.net/[].

[[ChLibsWin32Zlib]]

==== Win32 MSVC

The zlib sources are downloaded from
https://anonsvn.wireshark.org/wireshark-win32-libs/trunk/packages/[] and compiled
locally.

[[ChLibsPcap]]

=== libpcap/WinPcap (optional)

Libpcap and WinPcap provide that packet capture capabilities that are central
to Wireshark's core functionality.

[[ChLibsLibpcap]]

==== Unix: libpcap

If this library isn't already installed or available as a package for your
platform, you can get it at http://www.tcpdump.org/[].

[[ChLibsWinpPcap]]

==== Win32 MSVC: WinPcap

You can get the "Windows packet capture library" at:
https://www.winpcap.org/install/[]

[[ChLibsGNUTLS]]

=== GnuTLS (optional)

The GNU Transport Layer Security Library is used to dissect SSL and TLS
protocols (aka: HTTPS).

[[ChLibsUnixGNUTLS]]

==== Unix

If this library isn't already installed or available as a
package for your platform, you can get it at
https://www.gnu.org/software/gnutls/download.html[].

[[ChLibsWin32GNUTLS]]

==== Win32 MSVC

We provide a package cross-compiled using MinGW32 at
https://anonsvn.wireshark.org/wireshark-win32-libs/trunk/packages/[].

[[ChLibsGcrypt]]

=== Gcrypt (optional)

The Gcrypt Library is a low-level encryption library that provides
support for many ciphers, such as DES, 3DES, AES, Blowfish, and others..

[[ChLibsUnixGcrypt]]

==== Unix

If this library isn't already installed or available as a
package for your platform, you can get it at
https://directory.fsf.org/wiki/Libgcrypt[].

[[ChLibsWin32Gcrypt]]

==== Win32 MSVC

Part of our GnuTLS package.

[[ChLibsKerberos]]

=== Kerberos (optional)

The Kerberos library is used to dissect Kerberos, sealed DCERPC and
secureLDAP protocols.

[[ChLibsUnixKerberos]]

==== Unix

If this library isn't already installed or available as a
package for your platform, you can get it at
http://web.mit.edu/Kerberos/dist/[].

[[ChLibsWin32Kerberos]]

==== Win32 MSVC

We provide a package at
https://anonsvn.wireshark.org/wireshark-win32-libs/trunk/packages/[].

[[ChLibsLua]]

=== LUA (optional)

The LUA library is used to add scripting support to Wireshark.

[[ChLibsUnixLua]]

==== Unix

If this library isn't already installed or available as a
package for your platform, you can get it at
http://www.lua.org/download.html[].

[[ChLibsWin32Lua]]

==== Win32 MSVC

We provide a copy of the official package at
https://anonsvn.wireshark.org/wireshark-win32-libs/trunk/packages/[].

[[ChLibsPortAudio]]

=== PortAudio (optional)

The PortAudio library enables audio output for RTP streams.

[[ChLibsUnixPortAudio]]

==== Unix

If this library isn't already installed or available as a
package for your platform, you can get it at
http://www.portaudio.com/download.html[].

[[ChLibsWin32PortAudio]]

==== Win32 MSVC

The PortAudio sources are downloaded from
https://anonsvn.wireshark.org/wireshark-win32-libs/trunk/packages/[] and compiled
locally.

[[ChLibsGeoIP]]

=== GeoIP (optional)

MaxMind Inc. publishes a GeoIP database for use in open source software.
It can be used to map IP addresses to geographical locations.

[[ChLibsUnixGeoIP]]

==== Unix

If this library isn't already installed or available as a
package for your platform, you can get it at
http://www.maxmind.com/app/c[].

[[ChLibsWin32GeoIP]]

==== Win32 MSVC

We provide a package cross-compiled using MinGW32 at
https://anonsvn.wireshark.org/wireshark-win32-libs/trunk/packages/[].

[[ChLibsWinSparkle]]

=== WinSparkle (optional)

WinSparkle is an easy-to-use software update library for Windows developers.

[[ChLibsWin32WinSparkle]]

==== Win32 MSVC

We provide a copy of the WinSparkle package at
https://anonsvn.wireshark.org/wireshark-win32-libs/trunk/packages/[].

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