.. _dhcpv4-client-sample:
Sample DHCPv4 client application
################################
Overview
********
This application starts a DHCPv4 client, gets an IPv4 address from the
DHCPv4 server, and prints address, lease time, netmask and router
information to a serial console.
Requirements
************
- :ref:`networking_with_qemu`
Building and Running
********************
Running DHCPv4 client in Linux Host
===================================
These are instructions for how to use this sample application using
QEMU on a Linux host to negotiate IP address from DHCPv4 server running
on Linux host.
To use QEMU for testing, follow the :ref:`networking_with_qemu` guide.
Here's a sample server configuration file '/etc/dhcpd/dhcp.conf'
used to configure the DHCPv4 server:
.. code-block:: console
log-facility local7;
default-lease-time 600;
max-lease-time 7200;
subnet 192.0.2.0 netmask 255.255.255.0 {
range 192.0.2.10 192.0.2.100;
}
Use another terminal window to start up a DHCPv4 server on the Linux host,
using this conf file:
.. code-block:: console
$ sudo dhcpd -d -4 -cf /etc/dhcp/dhcpd.conf -lf /var/lib/dhcp/dhcpd.leases tap0
Run Zephyr samples/net/dhcpv4_client application in QEMU:
.. zephyr-app-commands::
:zephyr-app: samples/net/dhcpv4_client
:host-os: unix
:board: qemu_x86
:goals: run
:compact:
Once DHCPv4 client address negotiation completed with server, details
are shown like this:
.. code-block:: console
[dhcpv4] [INF] main: In main
[dhcpv4] [INF] main_thread: Run dhcpv4 client
[dhcpv4] [INF] handler: Your address: 192.0.2.10
[dhcpv4] [INF] handler: Lease time: 600
[dhcpv4] [INF] handler: Subnet: 255.255.255.0
[dhcpv4] [INF] handler: Router: 0.0.0.0
To verify the Zephyr application client is running and has received
an ip address by typing:
.. code-block:: console
$ ping -I tap0 192.0.2.10
FRDM_K64F
=========
These are instructions for how to use this sample application running on
:ref:`frdm_k64f` board to negotiate IP address from DHCPv4 server running on
Linux host.
Connect ethernet cable from :ref:`Freedom-K64F board <frdm_k64f>` to Linux host
machine and check for new interfaces:
.. code-block:: console
$ ifconfig
Add ip address and routing information to interface:
.. code-block:: console
$ sudo ip addr add 192.0.2.2 dev eth1
$ sudo ip route add 192.0.2.0/24 dev eth1
Here's a sample server configuration file '/etc/dhcpd/dhcp.conf'
used to configure the DHCPv4 server:
.. code-block:: console
log-facility local7;
default-lease-time 600;
max-lease-time 7200;
subnet 192.0.2.0 netmask 255.255.255.0 {
range 192.0.2.10 192.0.2.100;
}
Use another terminal window to start up a DHCPv4 server on the Linux host,
using this conf file:
.. code-block:: console
$ sudo dhcpd -d -4 -cf /etc/dhcp/dhcpd.conf -lf /var/lib/dhcp/dhcpd.leases eth1
Build Zephyr samples/net/dhcpv4_client application:
.. zephyr-app-commands::
:zephyr-app: samples/net/dhcpv4_client
:host-os: unix
:board: frdm_k64f
:goals: build flash
:compact:
Once DHCPv4 client address negotiation completed with server, details
are shown like this:
.. code-block:: console
$ sudo screen /dev/ttyACM0 115200
[dhcpv4] [INF] main: In main
[dhcpv4] [INF] main_thread: Run dhcpv4 client
[dhcpv4] [INF] handler: Your address: 192.0.2.10
[dhcpv4] [INF] handler: Lease time: 600
[dhcpv4] [INF] handler: Subnet: 255.255.255.0
[dhcpv4] [INF] handler: Router: 0.0.0.0
To verify the Zephyr application client is running and has received
an ip address by typing:
.. code-block:: console
$ ping -I eth1 192.0.2.10
55ee53ce91