[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [lwip-users] ppp-new threading question

From: Ivan Delamer
Subject: Re: [lwip-users] ppp-new threading question
Date: Fri, 29 Aug 2014 14:38:11 -0600

Ok, that's what I thought. I will have to re-implement sio_write().

What I'm concerned also is, sio_write() is meant to block until all data is pushed out. This can be more than a second in a slow 9600bps connection (still used sometimes!!!). Will PPP try to do something during this time like try to re-send the packet or think it was lost? I'm not familiar with the internal ppp timer processes.

It also means more dynamic memory allocation since a reference to pbuf is not passed to sio_write().

Just thinking out loud I guess :-)


Date: Fri, 29 Aug 2014 22:29:17 +0200
From: Sylvain Rochet <address@hidden>
To: Mailing list for lwIP users <address@hidden>
Subject: Re: [lwip-users] ppp-new threading question
Message-ID: <address@hidden>
Content-Type: text/plain; charset="utf-8"

Hi Ivan,

On Fri, Aug 29, 2014 at 10:16:04AM -0600, Ivan Delamer wrote:
I feel almost embarrassed asking this but I haven't completely
figured it out yet.

In ppp-new, are packets sent to sio_write() from tcpip thread, or
from the RX process thread? Or both?

tcpip thread only.

(The stack owned RX process thread does not exist anymore, this was
broken by design).

I just ask because sio_write() may block for some time (at least in
my basic implementation) and I'm wondering if this is blocking the
rest of the stack.

Yes, it will, sio_write() should not block.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]