Forums - Aws mqtt-connect issue in qca4020

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Aws mqtt-connect issue in qca4020
gecloudtest
Join Date: 29 May 18
Posts: 9
Posted: Mon, 2018-11-12 09:24
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Hi,

I am trying to connect qca 4020 with aws cloud.

I am getting -28 error code (tls handshake timeout).
After dig deep into it , we got to know that , we have to set ALPN to x-amzn-mqtt-ca.

I am setting this configuration as below

if(qapi_Net_SSL_ALPN_Protocol_Add(pNetwork->tlsDataParams.sslCtx, "x-amzn-mqtt_ca"))
{
IOT_DEBUG("Error: ALPN Protocol add failed\n");
status =
NETWORK_SSL_UNKNOWN_ERROR;
goto error;
}

// Create SSL connection object
pNetwork->tlsDataParams.ssl = qapi_Net_SSL_Con_New(pNetwork->tlsDataParams.sslCtx,QAPI_NET_SSL_TLS_E);

Is this correct way to set the alpn?

Following function is returning timeout

/*SSL handshake with server*/
result = qapi_Net_SSL_Connect(pNetwork->tlsDataParams.ssl);

Can anyone suggest how can I configure the timeout or how can I set this alpn ?

Any help will be greatly appreciated

Thanks in advance,
Sushmita

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Re: Aws mqtt-connect issue in qca4020
c_rpedad
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Join Date: 18 Jun 18
Location: San Jose
Posts: 317
Posted: Mon, 2018-11-12 16:02
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Kindly refer to section "6.3.6.13 SSL" from document "QCA402 (CDB2x) Development Kit User Guide"

Example code for "ssl config" is available in [target]quartz/demo/QCLI_demo/src/net/ssl_demo.c

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Re: Aws mqtt-connect issue in qca4020
ss.pandiri
Join Date: 29 May 18
Posts: 58
Posted: Mon, 2018-11-12 23:37
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Dear Sushmitha,

In your code above, there's a minor issue:

Please change "x-amzn-mqtt_ca" to "x-amzn-mqtt-ca" (use hyphen in place of underscore). This is needed to connect  to AWSIoT 3.1.1.

if(qapi_Net_SSL_ALPN_Protocol_Add(pNetwork->tlsDataParams.sslCtx, "x-amzn-mqtt-ca"))
{
IOT_DEBUG("Error: ALPN Protocol add failed\n");
status =
NETWORK_SSL_UNKNOWN_ERROR;
goto error;
}

Also, QCA SDK needs to be updated with this change for benefit of AWSIoT 3.1.1  users

best regards

 

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Re: Aws mqtt-connect issue in qca4020
gecloudtest
Join Date: 29 May 18
Posts: 9
Posted: Tue, 2018-11-13 04:30
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thanks for your help 

It is working for me now.

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