Re: [lwip-users] Handling sudden disappearance of network i/f

[Janusz U.]

I use netconn API.
Reduced keep-alive times in tcp.h:
#define TCP_NODELAY    0x01    /* don't delay send to coalesce packets */
#define TCP_KEEPALIVE  0x02    /* send KEEPALIVE probes when idle for 
pcb->keepalive miliseconds */

/* Keepalive values */
#define  TCP_KEEPDEFAULT   7200/*7200000*/                       /* 
KEEPALIVE timer in miliseconds */
#define  TCP_KEEPINTVL     5000/*75000*/                         /* Time 
between KEEPALIVE probes in miliseconds */
#define  TCP_KEEPCNT       9                             /* Counter for 
KEEPALIVE probes */
#define  TCP_MAXIDLE       TCP_KEEPCNT * TCP_KEEPINTVL   /* Maximum 
KEEPALIVE probe time */

and nothing. When I disconnect cable from my serwer the lwIP does not detect 
link disconnection never. I still have in debug:
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_slowtmr: processing active pcb
tcp_slowtmr: processing active pcb
tcp_slowtmr: processing active pcb
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_slowtmr: processing active pcb
tcp_slowtmr: processing active pcb
tcp_slowtmr: processing active pcb
tcp_slowtmr: processing active pcb
tcp_slowtmr: polling application
tcp_slowtmr: processing active pcb
tcp_slowtmr: processing active pcb

I have not idea.
kind regards
Janusz