Hi Martin, Do you mind sharing the "sys_arch.c" file that you have adapted for lwIP 1.4.0 and AVR32? I (and likely many others) would find it exceedingly valuable! Thanks.
-Kelly Martin Persich wrote: > > Hi, there is a quite old Atmel's bug (aprox one year ago was discussed in > LwIP forum) . Both the timers (slow, fast) are started from the wrong task > and dont work anyway. Please upgrade to last version of LwIP (1.4.0) and > Atmel AVR32 library V 1.7. I had the same problems with old version. I'm > using LwIP 1.3.2 with many, many updates from CVS (nearly version 1.4.0) > and my "LwIP V 1.4.0 - ready" adapted port file "sys_arch.c" on AVR32 MCU > (IAR EWAVR32 compiler) without problems. > Best Regards > Martin Persich > > ----- Original Message ----- > From: farid mahini > To: Mailing list for lwIP users > Sent: Tuesday, September 21, 2010 1:37 AM > Subject: Re: [lwip-users] TCP KeepAlive > > > Upon accepting a client connection, I set the following socket options: > > - SOF_KEEPALIVE > - TCP_KEEPIDLE > - TCP_KEEPINTVL > > - TCP_KEEPCNT > > > > I have also set LWIP_TCP_KEEPALIVE = 1 and have verified that > lwip_setsockopt_internal is populating the appropriate registers. What > puzzles me is that neither slow or fast timer are firing which is where > KeepAlive action is detected and performed ! > > > > I am using lwIP 1.3.0 which is what AVR32 Studio had shipped. > > > > Thanx, > > -FM > > > > > > > ------------------------------------------------------------------------------ > From: Jeff Barber <[email protected]> > To: Mailing list for lwIP users <[email protected]> > Sent: Mon, September 20, 2010 2:38:21 PM > Subject: Re: [lwip-users] TCP KeepAlive > > On Mon, Sep 20, 2010 at 10:07 AM, farid mahini <[email protected]> > wrote: > > I am trying to enable KeepAlive/Idle feature, but I do not see a hit > on > > tcp_tmr, tcp_slowtmr, tcp_fasttmr on an established connection! I am > using > > lwIP 1.3 with FreeRTOS. I do not see the KeepAlive variables being > accessed > > anywhere else. Any ideas on what I may have overlooked? > > I am using keepalives and they do work. I'm using lwip version 1.3.2. > Here are a few notes that may help. > > The keepalive packet is sent in tcp_slowtmr when appropriate (assuming > the SOF_KEEPALIVE flag is set). The eventual timeout is also > determined by that function when the limit of keepalives to be sent is > reached. The per-session tick counter is set to the current global > tick counter value in tcp_process whenever a packet is received on a > given session, and the keep_alive_sent count is reset to zero at the > same time. > > I found the documentation for the keepalive variables to be a bit > unclear. Bottom line is that (by default) the first keepalive is sent > when there has been no activity on the session for > TCP_KEEPIDLE_DEFAULT milliseconds, then a new keepalive is sent every > TCP_KEEPINTVL_DEFAULT milliseconds until a total of > TCP_KEEPCNT_DEFAULT probes have been sent. At that point, the session > is closed. > > The default settings are such that the first keepalive is not sent > until two hours of inactivity, then 9 keepalives are sent spaced 75 > seconds apart. These were much too large for what I wanted: I have a > backplane ethernet between two closely-coupled systems and need to > detect loss of peer relatively quickly. I reduced them to 10 seconds > for the first keepalive, then 9 more probes sent two seconds apart. > (This is also *much* easier to test since you don't have to wait > around for two+ hours to see your session timeout. :-) > > Note that the setsockopts API also lets you set the values of these, > but in that case they are specified in seconds, not milliseconds. > > Jeff > > _______________________________________________ > lwip-users mailing list > [email protected] > http://lists.nongnu.org/mailman/listinfo/lwip-users > > > > > > ------------------------------------------------------------------------------ > > > _______________________________________________ > lwip-users mailing list > [email protected] > http://lists.nongnu.org/mailman/listinfo/lwip-users > _______________________________________________ > lwip-users mailing list > [email protected] > http://lists.nongnu.org/mailman/listinfo/lwip-users > -- View this message in context: http://old.nabble.com/TCP-KeepAlive-tp29759912p31710331.html Sent from the lwip-users mailing list archive at Nabble.com. _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
