.. _libmemif_build_doc:

Build Instructions
==================

Install dependencies
--------------------

::

    sudo apt-get install -y git cmake autoconf pkg_config libtool

Libmemif is now part of VPP repository. Follow fd.io wiki to pull source
code from VPP repository.
https://wiki.fd.io/view/VPP/Pulling,_Building,_Running,_Hacking_and_Pushing_VPP_Code#Pushing_Patches

Libmemif is located under extras/libmemif. From the vpp workspace root directory::

    mkdir -p extras/libmemif/build
    cd extras/libmemif/build
    cmake ..
    make install

Verify installation:
--------------------

::

    ./examples/icmp_responder -?

Use ``-?`` flag to display help::

    LIBMEMIF EXAMPLE APP: icmp_responder_example
    ==============================
    libmemif version: 4.0, memif version: 2.0
    ==============================
    In this example, memif endpoint connects to an external application.
    The example application can resolve ARP and reply to ICMPv4 packets.
    The program will exit once the interface is disconnected.
    ==============================
    Usage: icmp_responder [OPTIONS]

    Options:
            -r      Interface role <slave|master>. Default: slave
            -s      Socket path. Supports abstract socket using @ before the path. Default: /run/vpp/memif.sock
            -i      Interface id. Default: 0
            -a      IPv4 address. Default: 192.168.1.1
            -h      Mac address. Default: aa:aa:aa:aa:aa:aa
            -?      Show help and exit.
            -v      Show libmemif and memif version information and exit.

Use Cases
---------

Once the library is built/installed, refer to :ref:`libmemif_gettingstarted_doc`
and :ref:`libmemif_examples_doc` for additional information on basic use cases
and API usage.