Re: [lwip-users] Correct way to use SNTP safely

[Dirk Ziegelmeier]

Read:

http://www.nongnu.org/lwip/2_0_x/index.html

and

http://www.nongnu.org/lwip/2_0_x/pitfalls.html

Check the "Modules" section, the APIs are separated in "Callback-style" (tcpipthread only) and "Sequential-style" (to be used from other threads)

Ciao
Dirk

On Fri, Sep 22, 2017 at 8:51 AM, Wayne Uroda <address@hidden> wrote:

My mistake.

Other functions I am calling:

tcpip_init

netif_add

netif_set_default

netif_set_up

dhcp_start

dns_setserver

netbiosns_set_name

netbiosns_init

sntp_setservername

sntp_init

netconn_* 

netbuf_*

When I said the other functions use the mailbox, I guess I was referring to the netconn and netbuf functions, because all those other ones don't seem to use the mailbox.

I take it any function which doesn't make use of the mailbox should be called on the tcp thread somehow.

What is the preferred/easiest method of doing that?

Am I missing some key piece of "lwip for beginners" information which I never read in the first place?

Thanks

- Wayne

On Fri, Sep 22, 2017 at 3:43 PM, Simon Goldschmidt <address@hidden> wrote:

Wayne Uroda wrote:
>> Which functions are you talking about?
> I am calling only sntp_setservername and sntp_init from my code.

Ehrm, when I aske which functions you are talking about, I was referring to your "Every other lwip function I've used [..]" to see if you're violating threading anywhere else.

SNTP is a callback API application and must not be used from outside tcpip_thread (unless you write your own wrapper functions). Period. Nothing paranoid about that.


Simon

_______________________________________________
lwip-users mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/lwip-users

_______________________________________________
lwip-users mailing list
address@hidden
https://lists.nongnu.org/mailman/listinfo/lwip-users