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Re: [lwip-users] Regarding ppp issue

From: Sylvain Rochet
Subject: Re: [lwip-users] Regarding ppp issue
Date: Sat, 19 Jan 2019 16:25:13 +0100
User-agent: Mutt/1.5.23 (2014-03-12)

Hi Shivaraj,

On Sat, Jan 19, 2019 at 12:32:16PM +0530, shivaraj Dandagihalli wrote:
> Hi,
>     I'm using the linux-lwip here i'm not able to receive the ppp packets,
> whatever we are sending we receive the same data packets.please find the
> following attached log and send me some proper solution.

The reason could not be written more clearly in the debug log: "Serial 
line is looped back.". Please configure your TTY in RAW mode.

This is obvious once you remove all the useless garbage from the log:

$ egrep '^(sent|rcvd)' 3G_ppp_log.txt 
sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xa697346c> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0xa697346c> <pcomp> <accomp>]
sent [LCP ConfNak id=0x1 <magic 0x2b572cc0>]
rcvd [LCP ConfNak id=0x1 <magic 0x2b572cc0>]
sent [LCP ConfReq id=0x2 <asyncmap 0x0> <magic 0x1f3d4b7f> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x2 <asyncmap 0x0> <magic 0x1f3d4b7f> <pcomp> <accomp>]
sent [LCP ConfNak id=0x2 <magic 0x18addfe7>]
rcvd [LCP ConfNak id=0x2 <magic 0x18addfe7>]
sent [LCP ConfReq id=0x3 <asyncmap 0x0> <magic 0x8a70613> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x3 <asyncmap 0x0> <magic 0x8a70613> <pcomp> <accomp>]
sent [LCP ConfNak id=0x3 <magic 0xbc09c631>]
rcvd [LCP ConfNak id=0x3 <magic 0xbc09c631>]
sent [LCP ConfReq id=0x4 <asyncmap 0x0> <magic 0x3f2d2486> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x4 <asyncmap 0x0> <magic 0x3f2d2486> <pcomp> <accomp>]
sent [LCP ConfNak id=0x4 <magic 0x63434104>]
rcvd [LCP ConfNak id=0x4 <magic 0x63434104>]
sent [LCP ConfReq id=0x5 <asyncmap 0x0> <magic 0x7c6b5dd7> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x5 <asyncmap 0x0> <magic 0x7c6b5dd7> <pcomp> <accomp>]
sent [LCP ConfNak id=0x5 <magic 0x49f5853e>]
rcvd [LCP ConfNak id=0x5 <magic 0x49f5853e>]
sent [LCP ConfReq id=0x6 <asyncmap 0x0> <magic 0xf4c591f7> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x6 <asyncmap 0x0> <magic 0xf4c591f7> <pcomp> <accomp>]
sent [LCP ConfNak id=0x6 <magic 0xe066343f>]
rcvd [LCP ConfNak id=0x6 <magic 0xe066343f>]
sent [LCP ConfReq id=0x7 <asyncmap 0x0> <magic 0x9434156d> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x7 <asyncmap 0x0> <magic 0x9434156d> <pcomp> <accomp>]
sent [LCP ConfNak id=0x7 <magic 0xa881b27e>]
rcvd [LCP ConfNak id=0x7 <magic 0xa881b27e>]
sent [LCP ConfReq id=0x8 <asyncmap 0x0> <magic 0xe061b65e> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x8 <asyncmap 0x0> <magic 0xe061b65e> <pcomp> <accomp>]
sent [LCP ConfNak id=0x8 <magic 0xdcfd53dc>]
rcvd [LCP ConfNak id=0x8 <magic 0xdcfd53dc>]
sent [LCP ConfReq id=0x9 <asyncmap 0x0> <magic 0x3ee790d0> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0x9 <asyncmap 0x0> <magic 0x3ee790d0> <pcomp> <accomp>]
sent [LCP ConfNak id=0x9 <magic 0xaa15cb88>]
rcvd [LCP ConfNak id=0x9 <magic 0xaa15cb88>]
sent [LCP ConfReq id=0xa <asyncmap 0x0> <magic 0x4cc840e> <pcomp> <accomp>]
rcvd [LCP ConfReq id=0xa <asyncmap 0x0> <magic 0x4cc840e> <pcomp> <accomp>]
sent [LCP ConfNak id=0xa <magic 0xab028367>]
rcvd [LCP ConfNak id=0xa <magic 0xab028367>]
sent [LCP TermReq id=0xb "Loopback detected"]
rcvd [LCP TermReq id=0xb "Loopback detected"]
sent [LCP TermAck id=0xb]
rcvd [LCP TermAck id=0xb]


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