LwIP with WolfSSL Azure Iot Hub C SDK

Question

Hi,
Anyone get the Azure IoT Hub SDK for C (or middleware FreeRTOS) working with LwIP and WolfSSL?

Answer 1

Well I have now...

In coreMQTT/source/interface/transport_interface.h I define NetworkContext and NetworkContext_t.

/* Each compilation unit must define the NetworkContext struct. */
struct NetworkContext
{
  SocketHandle       xTCPSocket;
  void               *xSSLContext;
  Tls_t              *NgrfTls;
};

typedef struct NetworkContext NetworkContext_t;

Where Tls_t is our structure containing the everything necessary to use WolfSSL.

Then you must write your own Tls_SocketConnect, Tls_SocketDisconnect, Tls_SocketRecv, and Tls_SocketSend as mentioned in the SDK documetation.

Answer 2

Hello @dan.bom ,
I have discussed this with Product Team and here's what are our current suggestions:

1) Implement your own LwIP + WolfSSL + coreMQTT stack (the rest should be identical for Azure IoT FreeRTOS convenience)

2) Use our FreeRTOS reference with mbedTLS.

3) Use our Azure RTOS E2E solution with NetX.

Thank you!

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