Hi all I try to integrate PPP with a GPRS modem in our system. lwIP works well for ethernet in our system since 3 years. Since PPP is currently actively developed I've upgraded from 1.4.1 to current Master (16.03.2015).
The modem is connected to GPRS, then the PPP session is started. The communication parameters are negotiated successfully (LCP). The authentication is OK: Login OK. Now lwIP sends a Configuration request (IPCP): Raw: ff 03 80 21 01 01 00 16 03 06 00 00 00 00 81 06 00 00 00 00 83 06 00 00 00 00 6e db 7e Interpreted (Wireshark): Protocol: Internet Protocol Control Protocol (0x8021) Options: (18 bytes), IP address, Primary DNS Server IP Address, Secondary DNS Server IP Address IP address: 0.0.0.0 Primary DNS Server IP Address: 0.0.0.0 Secondary DNS Server IP Address: 0.0.0.0 After this frame the communication is dead, no answer received, no other frame sent. I've tried using various combinations of - No auth, PAP, Chap - With/without VJ header compression Questions: a) Has anybody a hint why it does not work? I think the provider should send a IPCP Configuration Request/Ack/Nack? b) I do not receive a callback (see pppos_create()). After a long timeout I try to restart, but without success: The stack is in a deadlock, I can't close the session. ppp_close(m_pSelf->ppp, true) does not give a callback either. So the only solution is to reset the whole system. How do I reset a hanging PPP session if no communication happens? Best regards Michael _______________________________________________ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users
