Re: [lwip-users] Packet queuing to an ARP table entry

[Amena El Homsi]

For the outgoing packets, in low_level_output() function, We copy the headers from the pbuf RAM to the frame memory and we inform the HW of the address of the frame to be sent. Then HWMAC will send the frame over the air and after it is successfully sent and the ACK is received, HWMAC send us the frame address to clean it.

For the incoming frames, I didn't face any problem in passing the frame address as pbuf payload ptr of PBUF_ROM type and LwIP did the necessary parsing of the received frames.

On Wed, Nov 15, 2017 at 4:47 PM, goldsimon <address@hidden> wrote:

Amena El Homsi wrote:
>> I tried to explain that before. Your ROM is not ROM. Data must be
>kept
>> unchanged until it is actually sent. How do you ensure this??
>>
>Our System will take care of this, Data will be kept unchanged until it
>is
>actually sent. Headers are copied from the Pbuf_RAM to the frame memory
>and
>the whole frame will stay in frame memory until it is actually sent.

Ok, so how do actually know *when* it is sent?

Simon

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--

Amena El-Homsi

Computer & Communication Engineer

Dipl. Eng,  M.S.