[EMAIL PROTECTED] wrote:
>
> How to close lwip?
> My problem is that i have gprs connection and the coonection is closed by
> peer after every 24h. What i have to do to restart lwip (ppp). I use
> lwip_init() to start connection on ecos platform. I search lwip_close() or
> something like that but now found. Any sugestions?
> before i call lwip_init() i dial to peer sending to modem at commands
> (ATD... etc.) when i recceive CONNECT then i call lwip_init() he negotiate
> LCP,PAP,IPCP then i have got connection, hov to repeat that step without
> reseting program?
Hello,
LwIP has been implemented such that it starts up fine, but not much thought has
been given to how to deallocate and destroy it. Indeed, lwip_close() or similar
does not exist. You are intended to keep the tasks in memory.
I initialise the stack then go into an infinite task command loop as follows:-
lwip_init
pppInit
pppSetAuth
while(1)
{
<start up low level data link here>
pppOpen
<await PPPERR_NONE arg in ppp link status callback>
<do your TCP/IP app-related stuff here>
pppClose
}
This works fine in that you can bring the link and PPP up and down repeatedly.
However, I currently have a problem (you may have seen the mails) whereby if
the link unexpectedly disappears (not due to pppClose), the TCP/IP layers do
not seem to be becoming aware that the network has gone. Unfortunately, I don't
know enought about the stack to know if I'm asking too much to expect this, or
whether there should be some kind of fail-safe timeout when sending packets
from the socket API. At the moment, when the network disappears and I have
ourstanding un-ACKed packets, the app just waits forever... 8-(
Hope this helps in some way, maybe you might have an opinion on my situation.
Kind regards,
Clive Wilson
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