zephyr

mirror of https://github.com/zephyrproject-rtos/zephyr synced 2025-09-16 05:41:55 +00:00

History

Jukka Rissanen d32503f57e net: nbuf: Split one global DATA pool to RX and TX DATA pools If we receive lot of packets, it might happen that we exhaust all the DATA buffers in the system. This would prevent from us sending anything to the network. Change this by splitting the DATA buffer pool into RX and TX parts. This way RX flooding cannot consume all DATA buffers that needs to be sent. Change-Id: I8e8934c6d5fdd47b579ffa6268721b5eb3d64b6d Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>		2017-03-09 20:33:43 +02:00
..
src	samples: mbedtls: Fixing entropy source	2017-03-09 20:33:40 +02:00
Makefile	mbedtls: add arduino 101 configuration to ssl client sample	2017-02-08 10:12:36 +02:00
prj_arduino_101.conf	net: nbuf: Split one global DATA pool to RX and TX DATA pools	2017-03-09 20:33:43 +02:00
prj_galileo.conf
README
testcase.ini

README

mbed TLS ssl client
+++++++++++

This sample code shows a simple client using mbed TLS on top of Zephyr


Prerequisites
=============

- Galileo Gen 2 Development Board
- USB to UART TTL (CH340, FTDI or equivalent)
- PC with Linux.
- screen command and gcc compiler
- LAN for testing purposes


Procedure
=========

a) Change the server, netmask and client addresses according to your network
   in src/tcp_cfg.h.

b) From a terminal window, type:

    make pristine && make BOARD=galileo

c) Copy the binary (outdir/zephyr.strip) to the Galileo's boot
   device. Insert the boot device.

d) Plug the USB side of the USB-UART cable to the PC.
   Connect the USB-UART cable to the Galileo.
   Connect the Galileo to the LAN.

e) Open a terminal window, type:

    screen /dev/ttyUSB0 115200

f) Obtain the mbed TLS code from and put it in a well know directory, in
   your Linux machine, this will be your server.

	- https://tls.mbed.org/download/start/mbedtls-2.3.0-apache.tgz

g) cd to that directory and start the server using a the preshared key

# tar -xvzf mbedtls-2.3.0-apache.tgz
# cd mbedtls-2.3.0
# CFLAGS="-I$PWD/configs -DMBEDTLS_CONFIG_FILE='<config-ccm-psk-tls1_2.h>'" make
# ./programs/ssl/ssl_server2 psk=000102030405060708090a0b0c0d0e0f

You should see something like this

  . Seeding the random number generator... ok
  . Bind on tcp://*:4433/ ... ok
  . Setting up the SSL/TLS structure... ok
  . Waiting for a remote connection ...


h) Power-up the board

i) 'screen' will show this after a few seconds:

WARNING: no console will be available to OS
error: no suitable video mode found.

  . Seeding the random number generator... ok
  . Setting up the SSL/TLS structure... ok
  . Connecting to tcp/localhost/4433... ok
  . Performing the SSL/TLS handshake... ok
  > Write to server: ok
  . Closing the connection... done

j) The server side should print

  . Waiting for a remote connection ... ok
  . Performing the SSL/TLS handshake... ok
    [ Protocol is TLSv1.2 ]
    [ Ciphersuite is TLS-PSK-WITH-AES-256-CCM-8 ]
    [ Record expansion is 21 ]
  < Read from client: 18 bytes read

GET / HTTP/1.0

  > Write to client: 139 bytes written in 1 fragments

HTTP/1.0 200 OK
Content-Type: text/html

<h2>mbed TLS Test Server</h2>
<p>Successful connection using: TLS-PSK-WITH-AES-256-CCM-8</p>

  . Closing the connection... done


Troubleshooting
===============

- If the server does not receive the  messages, use a network
  traffic analyzer, like Wireshark.

- Reset the board

References
==========

[1] https://www.zephyrproject.org/doc/getting_started/getting_started.html
[2] https://wiki.zephyrproject.org/view/Galileo_Gen1_Gen2
[3] https://tls.mbed.org/