I have LWIP 2.1.2 running using PPPOS through a 4G modem.
I now want to route the PPPOS via CMUX mode so that I can receive SMS
messages while leaving the PPP link up.
Although this largely works, I find it less reliable than without the
CMUX wrapper, so I thought I might check if the PPP layer was rejecting
anything as garbled.
Looking through ppp.h and ppp.c it seems there is an option
PPP_STATS_SUPPORT which would collect statistics on the link. But if I
#define PPP_STATS_SUPPORT 1 in lwipopts.h then compilation fails in
ipcp.c with the error
> netif/ppp/ipcp.c:2096:23: error: 'fsm' {aka 'struct fsm'} has no
member named 'unit'
> netif/ppp/ipcp.c:2129:24: error: 'fsm' {aka 'struct fsm'} has no
member named 'unit'
The offending lines are
#if PPP_STATS_SUPPORT
reset_link_stats(f->unit);
#endif /* PPP_STATS_SUPPORT */
#if PPP_STATS_SUPPORT
/* XXX a bit IPv4-centric here, we only need to get the stats
* before the interface is marked down. */
/* XXX more correct: we must get the stats before running the notifiers,
* at least for the radius plugin */
update_link_stats(f->unit);
#endif /* PPP_STATS_SUPPORT */
Do you have any suggestions as to how I could either fix this or use an
alternative way to monitor the PPP process.
Thanks,
Danish
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