92 lines
2.3 KiB
ReStructuredText
92 lines
2.3 KiB
ReStructuredText
.. _networking_with_native_posix:
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Networking with native_posix board
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##################################
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.. contents::
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:local:
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:depth: 2
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This page describes how to set up a virtual network between a (Linux) host
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and a Zephyr application running in a native_posix board.
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In this example, the :ref:`sockets-echo-server-sample` sample application from
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the Zephyr source distribution is run in native_posix board. The Zephyr
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native_posix board instance is connected to a Linux host using a tuntap device
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which is modeled in Linux as an Ethernet network interface.
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Prerequisites
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*************
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On the Linux Host, fetch the Zephyr ``net-tools`` project, which is located
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in a separate Git repository:
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.. code-block:: console
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git clone https://github.com/zephyrproject-rtos/net-tools
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Basic Setup
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***********
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For the steps below, you will need three terminal windows:
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* Terminal #1 is terminal window with net-tools being the current
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directory (``cd net-tools``)
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* Terminal #2 is your usual Zephyr development terminal,
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with the Zephyr environment initialized.
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* Terminal #3 is the console to the running Zephyr native_posix
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instance (optional).
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Step 1 - Create Ethernet interface
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==================================
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Before starting native_posix with network emulation, a network interface
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should be created.
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In terminal #1, type:
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.. code-block:: console
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./net-setup.sh
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You can tweak the behavior of the net-setup.sh script. See various options
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by running ``net-setup.sh`` like this:
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.. code-block:: console
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./net-setup.sh --help
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Step 2 - Start app in native_posix board
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========================================
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Build and start the ``echo_server`` sample application.
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In terminal #2, type:
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.. zephyr-app-commands::
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:zephyr-app: samples/net/sockets/echo_server
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:host-os: unix
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:board: native_posix
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:goals: run
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:compact:
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Step 3 - Connect to console (optional)
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======================================
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The console window should be launched automatically when the Zephyr instance is
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started but if it does not show up, you can manually connect to the console.
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The native_posix board will print a string like this when it starts:
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.. code-block:: console
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UART connected to pseudotty: /dev/pts/5
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You can manually connect to it like this:
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.. code-block:: console
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screen /dev/pts/5
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