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From: | Mehmet Ali Ekici |
Subject: | [lwip-users] PPP with NO_SYS=1 in an interrupt context |
Date: | Tue, 14 Jun 2011 12:29:52 +0300 |
Hi, We are using ti’s stellaris family for a project. TI
have ported lwip but without PPP. TI’s port of tcpip runs in
ethernet interrupt context. As timers and all network related jobs executed in
the interrupt context. I am now porting PPP to the same context. I am preparing
modem as follows #if PPP_SUPPORT const char *username = NULL, *password = NULL; #ifdef PPP_USERNAME username = PPP_USERNAME; #endif #ifdef PPP_PASSWORD password = PPP_PASSWORD; #endif UARTprintf("pppInit\n"); pppInit(); // ppp auth none pppSetAuth(PPPAUTHTYPE_ANY, username, password); After this I am calling the ppp functions in the
ethernet interrupt’s context as follows if((g_ulLocalTimer - g_pppCheckTimer)
>= 150) { g_pppCheckTimer =
g_ulLocalTimer; sys_check_timeouts(); count = sio_read(ppp_sio,
(u8_t*)rxbuf, 1024); if(count > 0) {
pppos_input(ppp_desc, rxbuf, count);
} } I am wondering if you can comment if there is an issue as I
am not able to set up the PPP session. Because we are running PPP in an interrupt context we cannot
use blocking sio functions. Must sio implementations be blocking for PPP
to work ? Finally here is the logs I hope you can help Executing command : ATDt*99# CONNECT <CR><LF>CONNECT<CR><LF> len = 11 : 0 Received expected result : CONNECT pppInit lcp_init: xmit_accm=0 0 0 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 24f8b455 lcp_addci: opt=7 lcp_addci: opt=8 pppWrite[0]: len=44 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 24 f8 b4 55 7d 27 7d 22 7d 28 7d 22 54 79 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 System initialised > 7e 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 21 7d 24 7d
21 7d 20 7d 2e 7d 25 7d 26 24 f8 b4 55 7d 27 7d 22 7d 28 7d 22 ad 7d 35 7e pppInProc[0]: got 69 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 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 7d 22 7d 20 7d 2a 7d 22 7d 26 7d 20
7d 20 7d 20 7d 20 36 d9 7e pppInProc[0]: got 29 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... IPCP: lowerup state 0 (LS_INITIAL) -> 2 (LS_CLOSED) pppWrite[0]: len=36 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 7e ff 03 c0 21 0a 08 6b e4 7e pppInProc[0]: got 10 bytes pppInProc[0]: Dropping bad fcs 0x70d6 proto=0xc021 We are getting this error. What might be the reason to
have it. Normally LCP is using it. How can we negotiate fcs 16 or 32 ? pppDrop: pbuf len=12, addr 2000509c 7e ff 7d 23 c0 21 7d 25 7d 22 7d 20 7d 3b 41 75 74 68 65 6e
74 69 63 61 74 69 6f 6e 20 66 61 69 6c 65 64 2c 20 fe 9c 7e pppInProc[0]: got 40 bytes pppInput[0]: LCP len=27 fsm_input(LCP):5,2,27 fsm_rtermreq(LCP): Rcvd id 2 state=9 (LS_OPENED) LCP terminated by peer (20004e98) link_down: 0 IPCP: lowerdown state 6 (LS_REQSENT) -> 1 (LS_STARTING) IPCP: close reason=LCP down state 1 (LS_STARTING) -> 0
(LS_INITIAL) pppLinkDown: unit 0 pppRecvWakeup: unit 0 Read abort ppp_send_config[0]: outACCM=ff ff ff ff ppp_recv_config[0]: inACCM=0 0 0 0 pppWrite[0]: len=18 7e ff 7d 23 c0 21 7d 26 7d 22 7d 20 7d 24 94 7d 2d 7e
fsm_sdata(LCP): Sent code 6,2,4. pppInput[0]: packet processed 0d 0a 4e 4f 20 43 41 52 52 49 45 52 0d 0a pppInProc[0]: got 14 bytes |
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