Re: [lwip-users] How to properly send packets of size greater than snd_buf?

[Bill Auerbach]

The tcp_sent callback should be used to continue to send data until all data
has been sent - for Raw API mode anyway.  See the http_raw example for a
typical approach to this.

Bill

-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf
Of bradleytse
Sent: Wednesday, December 18, 2013 2:07 PM
To: address@hidden
Subject: [lwip-users] How to properly send packets of size greater than
snd_buf?

How am I supposed to send packets of size greater than the pcb's snd_buf?
Right now my snd_buf is 8192 bytes, but the packets I am sending can be
~150kb. I know that one of the suggested methods is to return control to
main, and then use the tcp_poll callback function to finish sending the data
once the snd_buf has cleared, but this method is way too slow and I cannot
afford to wait like this. I need to force the whole packet to send right
away (or at least as fast as the receive can receive). 

I have tried using tcp_nagle_disable() and then tcp_output() but this does
not work. The snd_buf still does not clear out.

Any suggestions? I'm stumped at the moment.



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