Re: [lwip-users] Function send

[address@hidden]

Oscar F:
> Hello everybody!!
>
> I´m using EVK1100 with FreeRTOS and lwip, and i would like to know 
> this question.
>
> When i called  the send function, is the packet sent to the ethernet 
> line or this is queued and the return say me only that situation?
That depends on the API you are using (I'm assuming socket API here), on 
the protocol and your ethernet driver: for UDP, the packet is passed to 
your netif's linkoutput function before send() returns (unless the stack 
has to do an ARP request first). However, if you have a DMA-enabled MAC, 
this might mean the packet is queued for sending in the driver.
For TCP, send() returning means the data is queued in stack-internal 
buffers only.

Simon