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I am using RL-ARM TCPnet in an attempt to set up a PPP connection to Windows XP. Sometimes it all works well; i can connect to my device and i can normally exchange tcp packets. Other times, ppp links does not go up; in these cases, it seems like PC sends LCP packets also after PAP authentication has been achieved: library refuses those packets. Windows says "Logging on", and after a while gives up. I have observed that if i setup my modem at 38400 baud (baudrate between my modem and my cpu), ppp often works well, only sometimes fails; but if i setup my modem at 9600 baud (the same baudrate that modems handkshake between them), ppp does never work (the modem goes normally on-line).
Thanks in advance to everyone can give me any suggest.
Here is the log i have obtained with debug library:
PPP: Initialize PPP interface
PPP: Initialize PPP-LCP
PPP: Initialize PPP-PAP
PPP: Initialize PPP-IPCP
PPP: Enabling listen mode...
PPP: Username: tw, Password: teamware
PPP: *** Processing PPP frame ***
PPP: Frame len: 24 bytes
PPP: Protocol: C021
PPP: *** Processing PPP-LCP frame ***
PPP: LCP Config Request received.
PPP: Sending PPP frame...
PPP: Frame len: 16
PPP: Frame len: 26
PPP: Sending LCP Configuration request.
PPP: Frame len: 30
PPP: Frame len: 28 bytes
PPP: LCP Config Acknowledge received.
PPP: Async Char MAP: 00,0A,00,00
PPP: Enabled PF Compression
PPP: Enabled ACF Compression
PPP: Magic Number: 406FEC4F
PPP: Enabled PAP Authentication Protocol
PPP: Frame len: 20 bytes
PPP: Protocol: C023
PPP: *** Processing PPP-PAP frame ***
PPP: PAP Authentication Request received.
PPP: Remote Client login success.
PPP: Frame len: 20
PPP: LCP up, ignoring Config request.
Thanks for your prompt reply. My RL-ARM release is 3.21.
I am planning to buy the upgrade; i kindly ask if you can confirm that my problem is solved, or you only hope that. I can't understand why PPP does never go up at 9600 baud. Thanks again
Probably a timing issue - with 9600 baud, everything takes longer time.
Yes, I can confirm this, as I'm the one who was fixing the problem.
I bought the upgrade (waiting for delivery). As soon as possibile I will post my (hopefully correct) results. Regards
I have upgraded my project with MDK-ARM rel. 4.11 and RL-ARM rel. 4.11. I have again configured my modem at 9600 baud, and I have obtained the same PPP hanging. It seems that library refuses LCP configuration request received after successfully PAP authentication. If I am doing some mistake, please help me to find. I post the log obtained with debug library.
PPP: *** Processing PPP frame *** PPP: Frame len: 24 bytes PPP: Protocol : C021 PPP: *** Processing PPP-LCP frame *** PPP: LCP Config Request received PPP: Sending PPP frame PPP: Frame len: 16 PPP: Protocol : C021 PPP: *** Processing PPP frame *** PPP: Frame len: 24 bytes PPP: Protocol : C021 PPP: *** Processing PPP-LCP frame *** PPP: LCP Config Request received PPP: Sending PPP frame PPP: Frame len: 26 PPP: Protocol : C021 PPP: Sending LCP Configuration request PPP: Async Char MAP: 00,0A,00,00 PPP: Option: PF Compression PPP: Option: ACF Compression PPP: Magic Number: 2EB9EE48 PPP: Option: PAP Authentication PPP: Sending PPP frame PPP: Frame len: 30 PPP: Protocol : C021 PPP: Sending LCP Configuration request PPP: Async Char MAP: 00,0A,00,00 PPP: Option: PF Compression PPP: Option: ACF Compression PPP: Magic Number: 2EB9EE48 PPP: Option: PAP Authentication PPP: Sending PPP frame PPP: Frame len: 30 PPP: Protocol : C021 PPP: *** Processing PPP frame *** PPP: Frame len: 28 bytes PPP: Protocol : C021 PPP: *** Processing PPP-LCP frame *** PPP: LCP Config Acknowledge received PPP: Async Char MAP: 00,0A,00,00 PPP: Enabled PF Compression PPP: Enabled ACF Compression PPP: Magic Number: 2EB9EE48 PPP: Enabled PAP Authentication Protocol PPP: *** Processing PPP frame *** PPP: Frame len: 20 bytes PPP: Protocol : C023 PPP: *** Processing PPP-PAP frame *** PPP: PAP Authentication Request received PPP: Client login success PPP: Sending PPP frame PPP: Frame len: 20 PPP: Protocol : C023 PPP: *** Processing PPP frame *** PPP: Frame len: 24 bytes PPP: Protocol : C021 PPP: *** Processing PPP-LCP frame *** PPP: LCP up, ignoring Config request PPP: *** Processing PPP frame *** PPP: Frame len: 28 bytes PPP: Protocol : C021 PPP: *** Processing PPP-LCP frame *** PPP: LCP Config Acknowledge received PPP: Async Char MAP: 00,0A,00,00 PPP: Enabled PF Compression PPP: Enabled ACF Compression PPP: Magic Number: 2EB9EE48 PPP: Enabled PAP Authentication Protocol PPP: *** Processing PPP frame *** PPP: Frame len: 24 bytes PPP: Protocol : C021 PPP: *** Processing PPP-LCP frame *** PPP: LCP up, ignoring Config request PPP: *** Processing PPP frame *** PPP: Frame len: 24 bytes PPP: Protocol : C021 PPP: *** Processing PPP-LCP frame *** PPP: LCP up, ignoring Config request PPP: *** Processing PPP frame *** PPP: Frame len: 24 bytes PPP: Protocol : C021 PPP: *** Processing PPP-LCP frame *** PPP: LCP up, ignoring Config request PPP: *** Processing PPP frame *** PPP: Frame len: 24 bytes PPP: Protocol : C021 PPP: *** Processing PPP-LCP frame *** PPP: LCP up, ignoring Config request PPP: *** Processing PPP frame *** PPP: Frame len: 24 bytes PPP: Protocol : C021 PPP: *** Processing PPP-LCP frame *** PPP: LCP up, ignoring Config request PPP: *** Processing PPP frame *** PPP: Frame len: 24 bytes PPP: Protocol : C021 PPP: *** Processing PPP-LCP frame *** PPP: LCP up, ignoring Config request PPP: *** Processing PPP frame *** PPP: Frame len: 24 bytes PPP: Protocol : C021 PPP: *** Processing PPP-LCP frame *** PPP: LCP up, ignoring Config request PPP: *** Processing PPP frame *** PPP: Frame len: 24 bytes PPP: Protocol : C021 PPP: *** Processing PPP-LCP frame *** PPP: LCP up, ignoring Config request PPP: *** Processing PPP frame *** PPP: Frame len: 24 bytes PPP: Protocol : C021 PPP: *** Processing PPP-LCP frame *** PPP: LCP up, ignoring Config request PPP: Initialize PPP-LCP PPP: Initialize PPP-PAP PPP: Initialize PPP-IPCP
Thanks for your support
Can you check a ready made example from RL-ARM installation. There is a HTTP_demo example for MCB2140 and MCBSTR7, configured for PPP.
I have checked both examples; I don't find anything that can help me. Please note that with modem at 38400 baud, my PPP goes up (almost) always; it hangs always with modem at 9600 baud, and always in the same way: LCP up, ignoring Config request.
I have used two serials on my board to trace with PPPMonitor all frames exchanged between GSM modem and CPU. I can send the log files by mail if you think they can be useful. From them I see that, when authentication hangs, the cpu (i.e. RL-ARM library) - after successfully PAP authentication - receives a number of retries of LCP Configure Request; cpu ignores those messages and does not send the acknowledge (because for cpu, LCP is already up). I think that RL_ARM should acknolwledge those messages also if for itself the LCP is already up; maybe the caller could lose some messages due to line disturb, and for itself LCP is not up yet.
Please send your logs in email to support.intl@keil.com addressed to me.
Logs sent. Thanks.
Problem solved in the new TCP library. Thanks to Franc Urbanc for his careful and professional support.