Re: [lwip-users] lwip_connect fails

[address@hidden]

Heyu Zhu wrote:
> Hi everyone,
> I set up a client using lwip-1.3.2 and both sever and client are 
> connect by ethernet.
> When i call "lwip_connect" the client do send a correct arp-request 
> packet and the sever
> give a correct arp-reply packet. But after that don't send any packet 
> for a long time ,
> then lwip_connect return with an error.
> I don't know what shall i do to continue it.  What's wrong? Could you 
> give me some advice?
Do you have ARP_QUEUEING enabled? If so, the SYN-packet should be queued 
in etharp.c and sent out when your device receives the ARP response. You 
might probably first check if your device receives the ARP response.
If ARP_QUEUEING is disabled, the SYN-packet should eventually be 
retransmitted (by a call to tcp_tmr, which I hope you call at the 
correct interval).

Simon