Add DTLS example#615
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The server listens for the client to connect and send it a string. It then sends the same text back to the client.
lurch
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lurch
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lurch
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lurch
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lurch
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lurch
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lurch
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lurch
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Tested with mbedtls 3.x |
lurch
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Jul 11, 2025
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A load of minor formatting-tweak suggestions, and a small tidy-up to makecerts.sh
Please note that I've not tried building or running any of the C code!
| # Running the dtls examples | ||
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| The client connects to a server and sends it a few lines of text which it expects to be sent back. | ||
| You can build and run the client and server examples on two Pico W devices, or to test with just one Pico W device, you can run the server or client on a Linux host. |
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| You can build and run the client and server examples on two Pico W devices, or to test with just one Pico W device, you can run the server or client on a Linux host. | |
| You can build and run the client and server examples on two Pico W devices; or to test with just one Pico W device, you can run the server or client on a Linux host. |
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| ## Using openssl | ||
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| The `host/server.sh` and `host/client.sh` scripts demonstrate how to use DTLS with openssl, although you will have to echo text manually. |
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| The `host/server.sh` and `host/client.sh` scripts demonstrate how to use DTLS with openssl, although you will have to echo text manually. | |
| The `host/server.sh` and `host/client.sh` scripts demonstrate how to use DTLS with OpenSSL, although you will have to echo text manually. |
| The client connects to a server and sends it a few lines of text which it expects to be sent back. | ||
| You can build and run the client and server examples on two Pico W devices, or to test with just one Pico W device, you can run the server or client on a Linux host. | ||
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| ## Using openssl |
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| ## Using openssl | |
| ## Using OpenSSL |
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| # Setup | |||
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| These examples demonstrate how to use dtls via mbedtls on a Pico W device. | |||
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| These examples demonstrate how to use dtls via mbedtls on a Pico W device. | |
| These examples demonstrate how to use DTLS via Mbed TLS on a Pico W device. |
| ``` | ||
| The examples should now build. | ||
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| # Running the dtls examples |
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| # Running the dtls examples | |
| # Running the DTLS examples |
| @@ -0,0 +1,14 @@ | |||
| #!/usr/bin/bash | |||
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| #!/usr/bin/bash | |
| #!/bin/bash |
| @@ -0,0 +1,16 @@ | |||
| #!/usr/bin/bash | |||
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| #!/usr/bin/bash | |
| #!/bin/bash |
| SERVER_PORT=4433 | ||
| SERVER_ADDR=${DTLS_SERVER:-$1} | ||
| if [ -z "$SERVER_ADDR" ]; then | ||
| echo Pass dtls server address as a parameter or set DTLS_SERVER |
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| echo Pass dtls server address as a parameter or set DTLS_SERVER | |
| echo Pass DTLS server address as a parameter or set DTLS_SERVER |
| fi | ||
| echo Connecting to $SERVER_ADDR | ||
| echo Enter some text to send. Enter \"Q\" to exit | ||
| openssl s_client -dtls -cert $CERT_FOLDER/client.crt -key $CERT_FOLDER/client.key -verifyCAfile $CERT_FOLDER/ca.crt -timeout -connect $SERVER_ADDR:${SERVER_PORT} |
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| openssl s_client -dtls -cert $CERT_FOLDER/client.crt -key $CERT_FOLDER/client.key -verifyCAfile $CERT_FOLDER/ca.crt -timeout -connect $SERVER_ADDR:${SERVER_PORT} | |
| openssl s_client -dtls -cert $CERT_FOLDER/client.crt -key $CERT_FOLDER/client.key -verifyCAfile $CERT_FOLDER/ca.crt -timeout -connect $SERVER_ADDR:$SERVER_PORT |
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| SERVER_ADDR=${DTLS_SERVER:-$1} | ||
| if [ -z "$SERVER_ADDR" ]; then | ||
| echo Pass dtls server address as a parameter or set DTLS_SERVER |
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| echo Pass dtls server address as a parameter or set DTLS_SERVER | |
| echo Pass DTLS server address as a parameter or set DTLS_SERVER |
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The server listens for the client to connect and send it a string. It then sends the same text back to the client.