PPP LCP configuration issue

[Marcel Holtmann]

Hi Kristen,

> so I added some debug code to actually print the options during the
> configuration stage. And something seems to be wrong here.
> 
> lcp: pppcp_open_event: current state 0:INITIAL
> lcp: pppcp_up_event: current state 1:STARTING
> lcp: pppcp_initialize_restart_count: current state 1:STARTING
> lcp: pppcp_send_configure_request: current state 1:STARTING
> lcp: option 2 len 6 (Async-Control-Character-Map) 00 00 00 00
> lcp: pppcp_process_configure_request: current state 6:REQSENT
> lcp: option 2 len 6 (Async-Control-Character-Map) 00 00 00 00
> lcp: option 3 len 5 (Authentication-Protocol) c2 23 05
> lcp: option 5 len 6 (Magic-Number) 01 ff ef e0
> lcp: option 7 len 2 (Protocol-Field-Compression)
> lcp: option 8 len 2 (Address-and-Control-Field-Compression)
> lcp: pppcp_rcr_plus_event: current state 6:REQSENT
> lcp: pppcp_send_configure_ack: current state 6:REQSENT
> lcp: option 2 len 6 (Async-Control-Character-Map) 00 00 00 00
> lcp: option 3 len 5 (Authentication-Protocol) c2 23 05
> lcp: option 5 len 6 (Magic-Number) 01 ff ef e0
> lcp: option 7 len 2 (Protocol-Field-Compression)
> lcp: option 8 len 2 (Address-and-Control-Field-Compression)
> lcp: pppcp_process_configure_ack: current state 8:ACKSENT
> lcp: option 2 len 6 (Async-Control-Character-Map) 00 00 00 00
> oops -- found acked option 2 we didn't request
> lcp: pppcp_rca_event: current state 8:ACKSENT
> lcp: pppcp_initialize_restart_count: current state 8:ACKSENT
> 
> I see the oops comment here, but we clearly requested the async control
> character map. So why does it get recognized as not requested? This is
> clearly a bug and needs to be fixed.

so I added pppdump support to GAtPPP and gsmdial. This allows us to
create log files that can be read by pppdump and Wireshark. The method
of debugging with strace is just not feasible. The attached log file is
one of these. I see a couple of confirmation requests that were send
twice in a row. That seems to be wrong. Can you explain what is going
on.

Regards

Marcel

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