Pois bem...
Estou tendo um problema com um tunel pptp em um sistema embarado. Seguem alguns pedaços de log:
Servidor:
Dec 5 09:05:48 Digistar daemon.err pppd[12475]: Received bad configure-ack: 1a 04 78 00 18 04 78 00
Dec 5 09:05:51 Digistar daemon.debug pppd[12475]: sent [CCP ConfReq id=0x2 <deflate 15> <deflate(old#) 15>]
Dec 5 09:05:51 Digistar daemon.debug pptpd[12474]: GRE: accepting packet #24
Dec 5 09:05:51 Digistar
daemon.debug pptpd[12474]: GRE: accepting packet #25
Dec 5 09:05:51 Digistar daemon.debug pppd[12475]: rcvd [CCP ConfReq id=0x9 <deflate 15> <deflate(old#) 15>]
Dec 5 09:05:51 Digistar daemon.debug pppd[12475]: sent [CCP ConfAck id=0x9 <deflate 15> <deflate(old#) 15>]
Dec 5 09:05:51 Digistar daemon.debug pppd[12475]: rcvd [CCP ConfAck id=0x2 <deflate 15> <deflate(old#) 15>]
Dec 5 09:05:51 Digistar daemon.err pppd[12475]: Received bad configure-ack: 1a 04 78 00 18 04 78 00
Dec 5 09:05:52 Digistar syslog.info -- MARK --
Dec 5 09:05:54 Digistar daemon.debug pppd[12475]: sent [CCP ConfReq id=0x2 <deflate 15> <deflate(old#) 15>]
Dec 5 09:05:54 Digistar
daemon.debug pptpd[12474]: GRE: accepting packet #26
Dec 5 09:05:54 Digistar daemon.debug pptpd[12474]: GRE: accepting packet #27
Dec 5 09:05:54 Digistar daemon.debug pppd[12475]: rcvd [CCP ConfReq id=0xa <deflate 15> <deflate(old#) 15>]
Dec 5 09:05:54 Digistar daemon.debug pppd[12475]: sent [CCP ConfAck id=0xa <deflate 15> <deflate(old#) 15>]
Dec 5 09:05:54 Digistar daemon.debug pppd[12475]: rcvd [CCP ConfAck id=0x2 <deflate 15> <deflate(old#) 15>]
Dec 5 09:05:54 Digistar daemon.err pppd[12475]: Received bad configure-ack: 1a 04 78 00 18 04 78 00
Dec 5 09:05:57 Digistar daemon.warn pppd[12475]: CCP: timeout sending Config-Requests
Dec 5 09:06:25 Digistar
daemon.debug pptpd[12474]: CTRL: Received PPTP Control Message (type: 5)
Dec 5 09:06:25 Digistar daemon.debug pptpd[12474]: CTRL: Made a ECHO RPLY packet
Dec 5 09:06:25 Digistar daemon.debug pptpd[12474]: CTRL: I wrote 20 bytes to the client.
Dec 5 09:06:25 Digistar daemon.debug pptpd[12474]: CTRL: Sent packet to client
Dec 5 09:07:25 Digistar daemon.debug pptpd[12474]: CTRL: Sending ECHO REQ id 1
Dec 5 09:07:25 Digistar daemon.debug pptpd[12474]: CTRL: Made a ECHO REQ packet
Dec 5 09:07:25 Digistar daemon.debug pptpd[12474]: CTRL: I wrote 16 bytes to the client.
Dec 5 09:07:25 Digistar daemon.debug pptpd[12474]: CTRL: Sent packet to client
Cliente:
Dec 5 12:01:14 eng-4 pptp[7083]: anon log[main:
pptp.c:276]: The synchronous pptp option is NOT activated
Dec 5 12:01:14 eng-4 pptp[7086]: anon log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 1 'Start-Control-Connection-Request'
Dec 5 12:01:14 eng-4 pptp[7086]: anon log[ctrlp_disp:pptp_ctrl.c:738]: Received Start Control Connection Reply
Dec 5 12:01:14 eng-4 pptp[7086]: anon log[ctrlp_disp:pptp_ctrl.c:772]: Client connection established.
Dec 5 12:01:15 eng-4 pptp[7086]: anon log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 7 'Outgoing-Call-Request'
Dec 5 12:01:15 eng-4 pptp[7086]: anon log[ctrlp_disp:pptp_ctrl.c:857]: Received Outgoing Call Reply.
Dec 5 12:01:15 eng-4 pptp[7086]: anon log[ctrlp_disp:pptp_ctrl.c:896]: Outgoing call established (call ID 0, peer's call ID 1408).
Dec 5 12:01:15 eng-4 pppd[7088]: pppd 2.4.3 started by root, uid 0
Dec 5 12:01:15 eng-4 pppd[7088]: Using interface ppp0
Dec 5 12:01:15 eng-4 pppd[7088]: Connect: ppp0 <--> /dev/pts/5
Dec 5 12:01:15 eng-4 pppd[7088]: Warning - secret file /etc/ppp/pap-secrets has world and/or group access
Dec 5 12:01:17 eng-4 pppd[7088]: Warning - secret file /etc/ppp/pap-secrets has world and/or group access
Dec 5 12:01:17 eng-4 pppd[7088]: Remote message: Login ok
Dec 5 12:01:17 eng-4 pppd[7088]: PAP authentication succeeded
Dec 5 12:01:17 eng-4 kernel: PPP Deflate Compression module registered
Dec 5 12:01:17 eng-4 pppd[7088]: Deflate (15) compression enabled
Dec 5 12:01:17 eng-4 pppd[7088]: local IP address
192.168.10.51
Dec 5 12:01:17 eng-4 pppd[7088]: remote IP address 192.168.10.1
Dec 5 12:01:20 eng-4 pppd[7088]: Deflate (15) compression enabled
Este é o pedaço de codigo onde o erro é gerado.
if( !(f->callbacks->ackci? (*f->callbacks->ackci)(f, inp, len):
(len == 0)) ){
/* Ack is bad - ignore it */
error("Received bad configure-ack: %P", inp, len);
return;
}
Eu estou com uma grande tendencia a acreditar que nao é bug no codigo. Meus arquivos de configuraçao tambem acredito que nao tenham problemas.
Ele fica recebendo esses "bad configure-ack" desde o pacote #1.
Interessante, nao?
Se alguem tiver alguma ideia sera bem vinda.
--
Leonardo Korndorfer
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