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On 5/29/2018 2:00 PM, gzayzay wrote:
The following is
what I printed of the above message in hex format.
0d 0a 43 4f 4e 4e 45 43 54 20 31 30 30 30 30 30 30 30 30 0d 0a 7e
ff 7d 23 c0 21 7d 21 7d 21 7d 20 7d 39 7d 22 7d 26 7d 20 7d 20 7d
20 7d 20 7d 23 7d 25 c2 23 7d 25 7d 25 7d 26 45 36 dc 8c 7d 27 7d
22 7d 28 7d 22 cb a0 7e 7e ff 7d 23 c0 21 7d 21 7d 22 7d 20 7d 39
7d 22 7d 26 7d 20 7d 20 7d 20 7d 20 7d 23 7d 25 c2 23 7d 25 7d 25
7d 26 45 36 dc 8c 7d 27 7d 22 7d 28 7d 22 7d 27 4d 7e 7e ff 7d 23
c0 21 7d 21 7d 23 7d 20 7d 39 7d 22 7d 26 7d 20 7d 20 7d 20 7d 20
7d 23 7d 25 c2 23 7d 25 7d 25 7d 26 45 36 dc 8c 7d 27 7d 22 7d 28
7d 22 43 7d 36 7e 7e ff 7d 23 c0 21 7d 21 7d 24 7d 20 7d 39 7d 22
7d 26 7d 20 7d 20 7d 20
7e ff 7d 23 c0 21 7d 21 7d 32 7d 20 7d 39 7d 22 7d 26 7d 20 7d 20
7d 20 7d 20 7d 23 7d 25 c2 23 7d 25 7d 25 7d 26 45 36 dc 8c 7d 27
7d 22 7d 28 7d 22 7d 32 d1 7e 7e ff 7d 23 c0 21 7d 21 7d 33 7d 20
7d 39 7d 22 7d 26 7d 20 7d 20 7d 20 7d 20 7d 23 7d 25 c2 23 7d 25
7d 25 7d 26 45 36 dc 8c 7d 27 7d 22 7d 28 7d 22 56 8a 7e
0d 0a 4e 4f 20 43 41 52 52 49 45 52 0d 0a
The modem doesn't seem to be responding the messages sent from
LWIP ppp stack. The sio_read() and sio_write() functions are
called and after a while, I see timeout messages. I have attached
a file containing some logs information. pppLogs.txt
I am running FreeRTOS and a snippet of the code is as follows
shown below. When the callback function is called, the error code
is PPPERR_PROTOCOL (-8)
These are the bytes sent from the modem, correct? I broke them down
this way:
0000 ff 03 c0 21 01 01 00 19 02 06 00 00 00 00 03 05
0010 c2 23 05 05 06 45 36 dc 8c 07 02 08 02 cb a0
code=ConfReq(01) id=01 len=0019
0000 ff 03 c0 21 01 02 00 19 02 06 00 00 00 00 03 05
0010 c2 23 05 05 06 45 36 dc 8c 07 02 08 02 07 4d
code=ConfReq(01) id=02 len=0019
0000 ff 03 c0 21 01 03 00 19 02 06 00 00 00 00 03 05
0010 c2 23 05 05 06 45 36 dc 8c 07 02 08 02 43 16
code=ConfReq(01) id=03 len=0019
0000 ff 03 c0 21 01 04 00 19 02 06 00 00 00
BAD FCS!
0000 ff 03 c0 21 01 12 00 19 02 06 00 00 00 00 03 05
0010 c2 23 05 05 06 45 36 dc 8c 07 02 08 02 12 d1
code=ConfReq(01) id=12 len=0019
0000 ff 03 c0 21 01 13 00 19 02 06 00 00 00 00 03 05
0010 c2 23 05 05 06 45 36 dc 8c 07 02 08 02 56 8a
code=ConfReq(01) id=13 len=0019
It looks like the peer was sending you LCP Configure Request packets
(with incremental ID numbers). It also looks like you lost a chunk
of bytes between LCP ConfReq ID#04 and LCP ConfReq ID#12?!?
Do you have a log of the bytes you sent to the modem as well?
Patrick Klos
Klos Technologies, Inc.
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