119 lines
3.5 KiB
ReStructuredText
119 lines
3.5 KiB
ReStructuredText
.. _eth-native-posix-sample:
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Native Posix Ethernet
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#####################
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Overview
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********
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The eth_native_posix sample application for Zephyr creates a **zeth** network
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interface to the host system. One can communicate with Zephyr via this network
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interface.
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The source code for this sample application can be found at:
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:file:`samples/net/eth_native_posix`.
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Building And Running
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********************
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To build the eth_native_posix sample application, follow the steps
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below.
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.. zephyr-app-commands::
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:zephyr-app: samples/net/eth_native_posix
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:host-os: unix
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:board: native_posix
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:conf: <config file to use>
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:goals: build
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:compact:
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Normally one needs extra priviliges to create and configure the TAP device in
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the host system. Use sudo to execute the Zephyr process with admin privileges,
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like this:
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.. code-block:: console
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sudo --preserve-env=ZEPHYR_BASE make run
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If the ``sudo --preserve-env=ZEPHYR_BASE`` gives an error,
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just use ``sudo --preserve-env`` instead:
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If you want to connect two Zephyr instances together, you can do it like this:
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Create two Zephyr config files prj1.conf and prj2.conf. You can use
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:file:`samples/net/eth_native_posix/prj.conf` as a base.
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Set prj1.conf IP address configuration like this:
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.. code-block:: console
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CONFIG_NET_APP_MY_IPV6_ADDR="2001:db8:100::1"
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CONFIG_NET_APP_PEER_IPV6_ADDR="2001:db8:100::2"
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CONFIG_NET_APP_MY_IPV4_ADDR="198.51.100.1"
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CONFIG_NET_APP_PEER_IPV4_ADDR="198.51.100.2"
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CONFIG_NET_APP_MY_IPV4_GW="203.0.113.1"
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CONFIG_ETH_NATIVE_POSIX_RANDOM_MAC=n
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CONFIG_ETH_NATIVE_POSIX_MAC_ADDR="00:00:5e:00:53:64"
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CONFIG_ETH_NATIVE_POSIX_SETUP_SCRIPT="echo"
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CONFIG_ETH_NATIVE_POSIX_DRV_NAME="zeth.1"
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Set prj2.conf IP address configuration like this:
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.. code-block:: console
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CONFIG_NET_APP_MY_IPV6_ADDR="2001:db8:200::1"
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CONFIG_NET_APP_PEER_IPV6_ADDR="2001:db8:200::2"
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CONFIG_NET_APP_MY_IPV4_ADDR="203.0.113.1"
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CONFIG_NET_APP_PEER_IPV4_ADDR="203.0.113.2"
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CONFIG_NET_APP_MY_IPV4_GW="198.51.100.1"
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CONFIG_ETH_NATIVE_POSIX_RANDOM_MAC=n
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CONFIG_ETH_NATIVE_POSIX_MAC_ADDR="00:00:5e:00:53:c8"
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CONFIG_ETH_NATIVE_POSIX_SETUP_SCRIPT="echo"
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CONFIG_ETH_NATIVE_POSIX_DRV_NAME="zeth.2"
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Then compile and run two Zephyr instances
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(if ``sudo --preserve-env=ZEPHYR_BASE`` gives an error,
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just use ``sudo --preserve-env`` instead):
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.. code-block:: console
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mkdir -p build1/native_posix
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cmake -DCONF_FILE=prj1.conf -DBOARD=native_posix -Bbuild1/native_posix -H.
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make -s -C build1/native_posix
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sudo --preserve-env=ZEPHYR_BASE make -s -C build1/native_posix run
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.. code-block:: console
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mkdir -p build2/native_posix
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cmake -DCONF_FILE=prj2.conf -DBOARD=native_posix -Bbuild2/native_posix -H.
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make -s -C build2/native_posix
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sudo --preserve-env=ZEPHYR_BASE make -s -C build2/native_posix run
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Bridge the two Zephyr instances together:
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.. code-block:: console
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sudo brctl addbr zeth-br
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sudo brctl addif zeth-br zeth.1
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sudo brctl addif zeth-br zeth.2
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sudo ifconfig zeth-br up
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After this, you are able to ping device 1 from device 2 in net-shell:
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.. code-block:: console
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# In device 1
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net ping 2001:db8:200::1
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net ping 203.0.113.1
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.. code-block:: console
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# In device 2
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net ping 2001:db8:100::1
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net ping 198.51.100.1
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Note that in this setup you cannot access these two Zephyr devices from
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your host. If you want to do that, then you could create a new network
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interface with proper IP addresses and add that interface to the Zephyr
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bridge.
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