Re: [lwip-users] PPP with NO_SYS=1 in an interrupt context (David Empson

Hi David,

That information was a great help to us. We found that as you indicated the driver discards null (00) characters. Although we have got rid of that problem we face a new one.

The peer doesn’t respond to our IPCP message which I have checked message’s sanity. I have tried the same module with windows too. Windows succeeds seting up the PPP.

I have compared both only difference I see is Windows doesn’t get response to the first IPCP and resends then succeeds. Lwip doesn’t do any retransmission if it doesn’t get response which is suprising to me.

If you can give us someideas, we will appretiate a lot.

Here is our log and below is the window’s

pppInit

lcp_init: xmit_accm=0 0 0 0

upap_init: 0

pppOpen: COM1

pppOverSerialOpen: unit 0: Connecting

pppStart: 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 (LS_INITIAL) -> 2 (LS_CLOSED)

auth_reset: 0

lcp_addci: L opt=2 0

lcp_addci: L opt=5 52181044

lcp_addci: opt=7

lcp_addci: opt=8

pppWrite[0]: len=46

ff 7d 23 c0 21 7d 21 7d 21 7d 20 7d 34 7d 22 7d 26 7d 20 7d 20 7d 20 7d 20 7d 25 7d 26 52 7d 38 7d 30 44 7d 27 7d 22 7d 28 7d 22 6e e1 7e fsm_sdata(LCP): Sent code 1,1,20.

LCP: sending Configure-Request, id 1

LCP: open state 2 (LS_CLOSED) -> 6 (LS_REQSENT)

pppStart: finished

netif: setting default interface lm

System initialised7e ff 7d 23 c0 21 7d 21 7d 21 7d 20 7d 2e 7d 22 7d 26 7d 20 7d 2a 7d 20 7d 20 7d 23 7d 24 c0 23 f3 4d 7e 7e ff 7d 23 c0

pppInProc[0]: got 40 bytes

pppInput[0]: LCP len=14

fsm_input(LCP):1,1,14

fsm_rconfreq(LCP): Rcvd id 1 state=6 (LS_REQSENT)

lcp_reqci: ASYNCMAP=X PAP (C023)

lcp_reqci: returning CONFACK.

pppWrite[0]: len=35

7e ff 7d 23 c0 21 7d 22 7d 21 7d 20 7d 2e 7d 22 7d 26 7d 20 7d 2a 7d 20 7d 20 7d 23 7d 24 c0 23 cd ce 7e fsm_sdata(LCP): Sent code 2,1,14.

pppInput[0]: packet processed

21 7d 24 7d 21 7d 20 7d 2e 7d 25 7d 26 52 7d 38 7d 30 44 7d 27 7d 22 7d 28 7d 22 97 8d 7e

pppInProc[0]: got 30 bytes

pppInput[0]: LCP len=14

fsm_input(LCP):4,1,14

fsm_rconfnakrej(LCP): Rcvd id 1 state=8 (LS_ACKSENT)

lcp_rejci: long opt 5 rejected

lcp_rejci: void opt 7 rejected

lcp_rejci: void opt 8 rejected

lcp_addci: L opt=2 0

pppWrite[0]: len=28

ff 7d 23 c0 21 7d 21 7d 22 7d 20 7d 2a 7d 22 7d 26 7d 20 7d 20 7d 20 7d 20 5f ad 7e fsm_sdata(LCP): Sent code 1,2,10.

LCP: sending Configure-Request, id 2

pppInput[0]: packet processed

7e ff 7d 23 c0 21 7d 22

pppInProc[0]: got 8 bytes

7d 22 7d 20 7d 2a 7d 22 7d 26 7d 20 7d 20 7d 20 7d 20 36 d9 7e

pppInProc[0]: got 21 bytes

pppInput[0]: LCP len=10

fsm_input(LCP):2,2,10

fsm_rconfack(LCP): Rcvd id 2 state=8 (LS_ACKSENT)

lcp_acki: Ack

ppp_send_config[0]: outACCM=0 0 a 0

ppp_recv_config[0]: inACCM=0 0 0 0

pppWrite[0]: len=16

7e ff 03 c0 21 09 00 00 08 00 00 00 00 bb 6e 7e fsm_sdata(LCP): Sent code 9,0,8.

link_established: unit 0; Lowering up all protocols...

upap_lowerup: init 0 clientstate s=0

IPCP: lowerup state 0 (LS_INITIAL) -> 2 (LS_CLOSED)

upap_authwithpeer: 0 user=none password=none s=1

pppWrite[0]: len=21

ff 03 c0 23 01 01 00 0e 04 6e 6f 6e 65 04 6e 6f 6e 65 de 60 7e pap_sauth: Sent id 1

pppInput[0]: packet processed

7e ff 03 c0 21 0a 00 00 08 00 00 00 00 6b e4 7e 7e ff 03 c0 23 02 01 00 0d 08 4c 6f 67 69 6e 20 4f 4b 67 dc 7e

pppInProc[0]: got 37 bytes

pppInput[0]: LCP len=8

fsm_input(LCP):10,0,8

fsm_input(LCP): default:

pppInput[0]: packet processed

pppInput[0]: PAP len=13

pap_rauthack: Rcvd id 1 s=3

Remote message: Login OK

auth_withpeer_success: 0 proto=c023

pppWrite[0]: len=37

7e ff 03 80 21 01 01 00 1c 03 06 00 00 00 00 02 06 00 2d 0f 00 81 06 00 00 00 00 83 06 00 00 00 00 7d 5e 84 7e fsm_sdata(IPCP): Sent code 1,1,28.

IPCP: sending Configure-Request, id 1

IPCP: open state 2 (LS_CLOSED) -> 6 (LS_REQSENT)

pppInput[0]: packet processed

[14/06/2011 00:18:43] - Read data

7e ff 03 c0 23 02 00 00 0d 08 4c 6f 67 69 6e 20 ~ÿ.À#.....Login

4f 4b 32 59 7e OK2Y~

[14/06/2011 00:18:43] - Written data

7e ff 03 80 57 01 05 00 0e 01 0a 40 19 db 3f f2 ~ÿaddress@hiddenÛ?ò

21 84 47 ce ce 7e 7e ff 03 80 fd 01 06 00 0a 12 !„GÎÎ~~ÿ.€i.....

06 00 00 00 01 47 5a 7e 7e ff 03 80 21 01 07 00 .....GZ~~ÿ.€!...

28 02 06 00 2d 0f 01 03 06 00 00 00 00 81 06 00 (...-..........

00 00 00 82 06 00 00 00 00 83 06 00 00 00 00 84 ...‚.....ƒ.....„

06 00 00 00 00 0b 92 7e ......’~

[14/06/2011 00:18:43] - Read data

7e ff 03 c0 21 08 02 00 14 80 57 01 05 00 0e 01 ~ÿ.À!....€W.....

0a 40 19 db 3f f2 21 84 47 8c ae 7e 7e ff 03 c0 address@hiddenÛ?ò!„GŒ®~~ÿ.À

21 08 03 00 10 80 fd 01 06 00 0a 12 06 00 00 00 !....€i.........

01 e0 d5 7e .àÕ~

[14/06/2011 00:18:43] - Written data

7e ff 03 80 21 01 08 00 28 02 06 00 2d 0f 01 03 ~ÿ.€!...(...-...

06 00 00 00 00 81 06 00 00 00 00 82 06 00 00 00 ..........‚....

00 83 06 00 00 00 00 84 06 00 00 00 00 c2 29 7e .ƒ.....„.....Â)~

[14/06/2011 00:18:43] - Read data

7e ff 03 80 21 01 01 00 0a 03 06 c0 c8 01 15 66 ~ÿ.€!......ÀÈ..f

81 7e 7e ff 03 80 21 04 08 00 16 02 06 00 2d 0f ~~ÿ.€!.......-.

01 82 06 00 00 00 00 84 06 00 00 00 00 d1 c6 7e .‚.....„.....ÑÆ~

[14/06/2011 00:18:43] - Written data

7e ff 03 80 21 02 01 00 0a 03 06 c0 c8 01 15 0f ~ÿ.€!......ÀÈ...

f5 7e 7e ff 03 80 21 01 09 00 16 03 06 00 00 00 õ~~ÿ.€!.........

00 81 06 00 00 00 00 83 06 00 00 00 00 1f 68 7e ......ƒ......h~

[14/06/2011 00:18:43] - Read data

7e ff 03 80 21 03 09 00 16 03 06 bc 39 96 bf 81 ~ÿ.€!......¼9–¿

06 56 6c 84 a4 83 06 56 6c 84 a5 45 7a 7e .Vl„¤ƒ.Vl„¥Ez~

[14/06/2011 00:18:43] - Written data

7e ff 03 80 21 01 0a 00 16 03 06 bc 39 96 bf 81 ~ÿ.€!......¼9–¿

06 56 6c 84 a4 83 06 56 6c 84 a5 5a 79 7e .Vl„¤ƒ.Vl„¥Zy~

[14/06/2011 00:18:43] - Read data

7e ff 03 80 21 02 0a 00 16 03 06 bc 39 96 bf 81 ~ÿ.€!......¼9–¿

06 56 6c 84 a4 83 06 56 6c 84 a5 ac 8a 7e .Vl„¤ƒ.Vl„¥¬Š~

[14/06/2011 00:18:43] - Written data

7e ff 03 00 21 45 00 01 48 00 01 00 00 80 7d 31 ~ÿ..!E..H....€}1

e6 ab bc 39 96 bf ff ff ff ff 00 44 00 43 01 34 æ«¼9–¿ÿÿÿÿ.D.C.4

b2 07 01 08 00 00 68 47 c7 3a 06 00 00 00 bc 39 ².....hGÇ:....¼9

96 bf 00 00 00 00 00 00 00 00 00 00 00 00 00 00 –¿..............

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

00 00 00 00 00 00 00 00 00 00 00 00 00 00 63 82 ..............c‚

53 63 35 01 08 3d 7d 31 00 34 a7 63 35 bf 61 42 Sc5..=}1.4§c5¿aB

4f 7d b1 bb bc 57 e8 cc 69 1f 0c 08 73 65 6b 2d O}±»¼WèÌi...sek-

61 63 65 72 3c 08 4d 53 46 54 20 35 2e 30 37 06 acer<.MSFT 5.07.

06 2c 2b 01 f9 0f ff 00 00 00 00 00 00 00 00 00 .,+.ù.ÿ.........

b8 3b 7e 7e ff 03 00 21 45 00 00 4b 00 03 00 00 ¸;~~ÿ..!E..K....

80 7d 31 0c 96 bc 39 96 bf 56 6c 84 a4 d5 a1 00 €}1.–¼9–¿Vl„¤Õ¡.

35 00 37 ed e6 d5 cc 01 00 00 01 00 00 00 00 00 5.7íæÕÌ.........

00 02 61 75 08 64 6f 77 6e 6c 6f 61 64 0d 77 69 ..au.download.wi

6e 64 6f 77 73 75 70 64 61 74 65 03 63 6f 6d 00 ndowsupdate.com.

00 01 00 01 a6 ec 7e 7e ff 03 00 21 45 00 00 3c ....¦ì~~ÿ..!E..<

00 04 00 00 80 7d 31 0c a4 bc 39 96 bf 56 6c 84 ....€}1.¤¼9–¿Vl„

a4 e6 7d b1 00 35 00 28 53 7d 33 09 7d 33 01 00 ¤æ}±.5.(S}3.}3..

00 01 00 00 00 00 00 00 03 77 77 77 06 67 6f 6f .........www.goo

67 6c 65 03 63 6f 6d 00 00 01 00 01 15 df 7e gle.com......ß~

From:	Mehmet Ali Ekici
Subject:	Re: [lwip-users] PPP with NO_SYS=1 in an interrupt context (David Empson)
Date:	Fri, 17 Jun 2011 10:12:37 +0300