78 lines
1.6 KiB
ReStructuredText
78 lines
1.6 KiB
ReStructuredText
.. _coaps-server-sample:
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CoAP over DTLS sample server
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############################
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Overview
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********
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This sample code shows a CoAP over DTLS server using mbedTLS on top of Zephyr.
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Building and Running
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********************
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Follow the steps for testing :ref:`networking_with_qemu`.
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In the application directory type:
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.. code-block:: console
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$ make run
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In other terminal window, obtain the libcoap code from:
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.. code-block:: console
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$ git clone --recursive -b dtls https://github.com/obgm/libcoap.git
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and put it in a well known directory, in your Linux machine, this will be your
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client. In order to compile libcoap you may need to install the following
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libraries, for Ubuntu
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.. code-block:: console
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$ sudo apt-get install libtool asciidoc
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Move to that directory and compile the libcoap on your host machine
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.. code-block:: console
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$ ./autogen.sh
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$ ./configure --disable-shared
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$ make all
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Now you can run the client like
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.. code-block:: console
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$ cd examples
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$ ./coap-client -m get coaps://[2001:db8::1]/test -u Client_identity -k passwd
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You will get the following output:
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.. code-block:: console
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v:1 t:CON c:GET i:7154 {} [ ]
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decrypt_verify(): found 24 bytes cleartext
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decrypt_verify(): found 123 bytes cleartext
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Type: 0
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Code: 1
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MID: 29012
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From the app directory type the screen should display
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.. code-block:: console
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*******
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type: 0 code 1 id 29012
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*******
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mbedtls_ssl_read returned -0x7780
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If the server does not receive the messages, restart the app and try to connect
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the client again.
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References
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**********
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* https://tls.mbed.org/
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* https://libcoap.net/
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