Re: [lwip-users] How to test IP over PPP ?

[Peter Graf]

Jani Monoses wrote:

> > >what does tcpdump show?
> > Since file access is problematic on my target, I had disabled tcpdump.
>
> I meant tcpdump -i ppp0 on your host but as you say you sniffed the
> serial port.

Yes. My vague guess is that something in the PPP negotiation packets isn't 
correctly sent or received on big endian targets.

Here are the debug logs. As have little knowledge about PPP, a hint what 
this actually means is welcome.

Thanks,
Peter
--

lwIP side:

lcp_init: xmit_accm=0 0 0 0
upap_init: 0
lcp_init: xmit_accm=0 0 0 0
pppMain: unit 0: Connecting
pppStartCB: unit 0
ppp_set_xaccm[0]: outACCM=0 0 0 0
ppp_send_config[0]: outACCM=FF FF FF FF
ppp_recv_config[0]: inACCM=0 0 0 0
lcp_lowerup: asyncmap=0 0 0 0
LCP: lowerup state 0 -> 2
auth_reset: 0
lcp_addci: L opt=2 0
lcp_addci: L opt=5 44101852
lcp_addci: opt=7
lcp_addci: opt=8
pppWrite[0]: len=47
fsm_sdata(LCP): Sent code 1,1,20.
LCP: sending Configure-Request, id 1
LCP: open state 2 -> 6
LCP: timeout resending Config-Request state=6
lcp_addci: L opt=2 0
lcp_addci: L opt=5 44101852
lcp_addci: opt=7
lcp_addci: opt=8
pppWrite[0]: len=47
fsm_sdata(LCP): Sent code 1,1,20.
LCP: sending Configure-Request, id 1
LCP: timeout resending Config-Request state=6
lcp_addci: L opt=2 0
lcp_addci: L opt=5 44101852
lcp_addci: opt=7
lcp_addci: opt=8
pppWrite[0]: len=47
fsm_sdata(LCP): Sent code 1,1,20.
LCP: sending Configure-Request, id 1
LCP: timeout resending Config-Request state=6
lcp_addci: L opt=2 0
lcp_addci: L opt=5 44101852
lcp_addci: opt=7
lcp_addci: opt=8
pppWrite[0]: len=47
fsm_sdata(LCP): Sent code 1,1,20.
LCP: sending Configure-Request, id 1
LCP: timeout resending Config-Request state=6
lcp_addci: L opt=2 0
lcp_addci: L opt=5 44101852
lcp_addci: opt=7
lcp_addci: opt=8
pppWrite[0]: len=47
fsm_sdata(LCP): Sent code 1,1,20.
LCP: sending Configure-Request, id 1
LCP: timeout resending Config-Request state=6
lcp_addci: L opt=2 0
lcp_addci: L opt=5 44101852
lcp_addci: opt=7
lcp_addci: opt=8
pppWrite[0]: len=47
fsm_sdata(LCP): Sent code 1,1,20.
LCP: sending Configure-Request, id 1
LCP: timeout resending Config-Request state=6
lcp_addci: L opt=2 0
lcp_addci: L opt=5 44101852
lcp_addci: opt=7
lcp_addci: opt=8
pppWrite[0]: len=47
fsm_sdata(LCP): Sent code 1,1,20.
LCP: sending Configure-Request, id 1
LCP: timeout resending Config-Request state=6
lcp_addci: L opt=2 0
lcp_addci: L opt=5 44101852
lcp_addci: opt=7
lcp_addci: opt=8
pppWrite[0]: len=47
fsm_sdata(LCP): Sent code 1,1,20.
LCP: send

----------------------------------------------------------------------------
Linux side ( /var/log/messages )

Sep 14 20:42:55 pg kernel: PPP generic driver version 2.4.1
Sep 14 20:42:55 pg pppd[1169]: pppd 2.4.1 started by root, uid 0
Sep 14 20:42:55 pg pppd[1169]: Using interface ppp0
Sep 14 20:42:55 pg pppd[1169]: Connect: ppp0 <--> /dev/ttyS2
Sep 14 20:43:25 pg pppd[1169]: LCP: timeout sending Config-Requests
Sep 14 20:43:25 pg pppd[1169]: Connection terminated.
Sep 14 20:43:25 pg pppd[1169]: Exit.