Re: [lwip-users] HTTPS support in lwip

[Noam Weissman]

Simon,

If I was not clear, my apologies... lots of RAM due to the use of SSL and not LwIP

BR,

Noam.

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From: lwip-users <lwip-users-bounces+address@hidden> on behalf of address@hidden <address@hidden>
Sent: Wednesday, May 17, 2017 9:34 PM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] HTTPS support in lwip

 

Noam Weissman wrote:

First of all the code is still in development and secondly you need lots of RAM.

That "lots of RAM" is a limitation of TLS, not a limitation of mbed TLS or how lwIP uses it.
That code is still not finished though. And I have to come up with RAM/ROM numbers once it is finished...

Anyway, for devices where HTTPS is only one out of many services, that usage is far from ideal as it encrypts/decrypts data in the tcpip_thread. And during potentially slow/long encrypt/decrypt phases, nothing else can be done in lwIP (e.g. no packet processing, no ping, no ACKs...). A socket or netconn-based server might be a better idea for some...

Simon