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
************
- net_tools:
https://wiki.zephyrproject.org/view/Networking-with-Qemu
Building and Running
********************
QEMU x86
========
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.
Follow readme from:
Run 'loop_socat' and 'loop-slip-tap' scripts from net-tools.
https://gerrit.zephyrproject.org/r/gitweb?p=net-tools.git;a=blob;f=README
.. code-block:: console
$ ./loop_socat.sh
In another window:
.. code-block:: console
$ sudo ./loop-slip-tap.sh
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:
.. code-block:: console
$ cd $ZEPHYR_BASE/samples/net/dhcpv4_client
$ make pristine && make qemu
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 in FRDM_K64F
board to negotiate IP address from DHCPv4 server running on Linux host.
Instructions to follow building, flashing and observe serial console logs:
https://wiki.zephyrproject.org/view/NXP_FRDM-K64F#Quick_Start
Connect ethernet cable from frdm board 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:
.. code-block:: console
$ cd $ZEPHYR_BASE/samples/net/dhcpv4_client
$ make pristine && make BOARD=frdm_k64f
$ cp outdir/frdm_k64f/zephyr.bin /media/rveerama/MBED/
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
227bf97f60