Re: [lwip-users] PPPoS: Question regarding reconnect after connection lost

[Axel Lin]

2017-04-06 17:08 GMT+08:00 Axel Lin <address@hidden>:
> Hi list,
> My device sometimes got status_cb: err_code=PPPERR_CONNECT (Connection lost).
> To reconnect, I call ppp_connect(pcb, 30); if got PPPERR_CONNECT but
> it seems never success.
>
> Initially, I can connect to internet after boot.
> I usually got below phases:
>         PPP_PHASE_DEAD
>         PPP_PHASE_INITIALIZE
>         PPP_PHASE_ESTABLISH
>         PPP_PHASE_AUTHENTICATE
>         PPP_PHASE_NETWORK
>         PPP_PHASE_RUNNING
>
> When I got PPPERR_CONNECT and calling ppp_connect(pcb, 30);
> I always got
>         PPP_PHASE_HOLDOFF
>         PPP_PHASE_INITIALIZE
>         PPP_PHASE_ESTABLISH
>         PPP_PHASE_DISCONNECT
>         PPP_PHASE_DEAD
>
> It seems the PPP_PHASE_AUTHENTICATE is missed but I'm not sure if I
> miss anything.
> I'm mainly reference the doc/ppp.txt.
> Should I also add ppp_set_auth() before calling ppp_connect() when got
> PPPERR_CONNECT?
It should be nothing to do with ppp_set_auth() because I don't set
username/password at all.

I hit this again with PPP_DEBUG enabled, so add the log:

Below is the log when I got connection lost if enable PPP_DEBUG:

LCP terminated by peer
ppp phase changed[0]: phase=9
sifvjcomp[0]: VJ compress enable=0 slot=0 max slot=0
sifdown[0]: err_code=0
NETIF: pp0 is UP
IPV4: Host at 0.0.0.0 mask 255.255.255.255 gateway 10.64.64.64
ppp phase changed[0]: phase=6
pppos_send_config[0]: out_accm=FF FF FF FF
ppp_send_config[0]
pppos_recv_config[0]: in_accm=0 0 0 0
ppp_recv_config[0]
ppp phase changed[0]: phase=12


Below is the log when booting... (for comparison).

[17:17:56:292] ATD*99***1#␍␍␊
[17:17:56:294] CONNECT 115200␍␊
[17:17:56:294] @P0␍␍␊
[17:17:56:294] ppp_connect[0]: holdoff=0␍␊
[17:17:56:330] ppp phase changed[0]: phase=3␍␊
[17:17:56:330] pppos_connect: unit 0: connecting␍␊
[17:17:56:330] ppp_start[0]␍␊
[17:17:56:330] ppp phase changed[0]: phase=6
[17:17:56:330] pppos_send_config[0]: out_accm=FF FF FF FF␍␊
[17:17:56:330] ppp_send_config[0]␍␊
[17:17:56:330] pppos_recv_config[0]: in_accm=FF FF FF FF␍␊
[17:17:56:330] ppp_recv_config[0]␍␊
[17:17:56:330] ppp: auth protocols: PAP=1 CHAP=1 CHAP_MD5=1␍␊
[17:17:56:330] pppos_write[0]: len=24␍␊
[17:17:56:330] ppp_start[0]: finished␍pppos_input[0]: got 28 bytes␍␊
[17:17:56:356] ␊
[17:17:56:356] pppos_input[0]: got 71 bytes␍␊
[17:17:56:356] pppos_write[0]: len=29␍␊
[17:17:56:356] netif_set_mtu[0]: mtu=1500␍␊
[17:17:56:356] pppos_send_config[0]: out_accm=0 0 0 0␍␊
[17:17:56:370] ppp_send_config[0]␍␊
[17:17:56:370] pppos_recv_config[0]: in_accm=0 0 0 0␍␊
[17:17:56:370] ppp_recv_config[0]␍␊
[17:17:56:370] ppp phase changed[0]: phase=7
[17:17:56:370] pppos_input[0]: got 24 bytes␍␊
[17:17:56:384] pppos_input[0]: got 39 bytes␍␊
[17:17:56:384] No CHAP secret found for authenticating us to UMTS_CHAP_SRVR␍␊
[17:17:56:384] pppos_write[0]: len=25␍␊
[17:17:56:395] pppos_input[0]: got 10 bytes␍␊
[17:17:56:395] CHAP authentication succeeded␍␊
[17:17:56:405] CHAP authentication succeeded␍␊
[17:17:56:405] ppp phase changed[0]: phase=9