Re: [lwip-users] Can I add some members to struct pbuf?

[Noam weissman]

Hi,

 

You should not add any members to anything inside the LwIP. Treat it as a close black box with interface.

 

If you need any parameters this should be defined inside your own code. The simplest will be defining your

own structure and when you get a new connection you assigne it to the new PCB.

 

Example:

------------------------------------------------------------------------------------------------------

    // Allocate memory for the structure that holds the local variables related

    // to the new connection

    ts = (__tcp_term_ts*)mem_malloc(sizeof(__tcp_term_ts));

 

    // Tell TCP that this is the structure we wish to be passed for our callbacks.

    tcp_arg(pcb, ts);   

------------------------------------------------------------------------------------------------------

 

In the above example  __tcp_term_ts is your own definition. Every call back function gives you a pointer to

This param.

 

Hope this helped,

Noam.

 

From: address@hidden [mailto:address@hidden On Behalf Of Richard Wood
Sent: ו 12 אפריל 2013 11:00
To: address@hidden
Subject: [lwip-users] Can I add some members to struct pbuf?

 

I want to add some members to struct pbuf. Then, it caused assertions

like this:

pbuf_free: p->ref > 0 mem_free: mem->usedpbuf_free:p->ref > 0

infinitely.

 

why does this happen?

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