Date: Thu, 19 Dec 96 22:20 CST From: uhclem@nemesis.lonestar.org To: FreeBSD-gnats-submit@freebsd.org Subject: bin/2255: Client PPP negotiates Stacker compression - FDIV049 Message-ID: <m0vawS4-000uMMC@nemesis.lonestar.org> Resent-Message-ID: <199612200430.UAA04973@freefall.freebsd.org>
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>Number: 2255 >Category: bin >Synopsis: Client PPP negotiates Stacker compression - FDIV049 >Confidential: no >Severity: serious >Priority: low >Responsible: freebsd-bugs >State: open >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Dec 19 20:30:01 PST 1996 >Last-Modified: >Originator: Frank Durda IV >Organization: >Release: FreeBSD 2.1.5-RELEASE >Environment: FreeBSD 2.1.5 system, with an external Sportster 33.6 modem, attempting to contact an Internet provider who is using the Nortel Rapport Dialup Switch, Version BETA 4.5b5 96/10/28, possibly other versions too. >Description: When attempting to connect to an ISP who is using the Nortel Rapport Dialup Switch (and assorted mechanisms that intercept your call to an ISP and route it off the public switched telephone network and to a modem pool shared by one or more ISPs. From there your packets are routed based on the call ANI to the appropriate ISP using L2F or other mechanisms. In our case, the vendors do not have Script(textual) implemented under L2F, so only PAP logins travel under L2F. Script logins are handled more like a traditional terminal server, obtaining IP numbers from a fixed pool. When using PAP for connections, there is no problem and the connection completes normally. When Script (textual) logins are used, the Shiva terminal server (inside the Rapport) offers Stacker compression #0, which for some reason it thinks the FreeBSD (and Linux) PPP clients accept. Once this happens, the connection is established, but you can't do anything and your logs fill with error messages. Shiva thinks the problem is with the FreeBSD PPP client since Trumpet Winsock also uses script login and correctly negotiates PRED1 compression. By disabling PRED1 compression negotiation on the PPP client side, the problem is avoided. Shiva has also found they can simply disable offering Stacker #0 compression and avoid the issue, but they would like to leave it on since it benefits customers using ISDN connections The issue at hand is why the FreeBSD PPP client thinks it can do Stacker #0 when it can't. Or, is FreeBSD saying it can't do Stacker #0 and the Shiva terminal server thinks FreeBSD said it could. >How-To-Repeat: Assuming you can contact the offending terminal server, %ppp set line /dev/cuaa2 set speed 57600 set timeout 55555 term atdt number loginname password: add 0 0 HISADDR Now, try to ping something. Your log should look like this: 12-17 10:24:39 [7072] Using interface: tun0 12-17 10:24:39 [7072] PPP Started. 12-17 10:25:54 [7072] *Connected! 12-17 10:26:11 [7072] LCP: state change Initial --> Closed 12-17 10:26:11 [7072] LCP: state change Closed --> Stopped 12-17 10:26:13 [7072] LCP: Received Configure Request (2) state = Stopped (3) 12-17 10:26:13 [7072] MRU 1522 12-17 10:26:13 [7072] ACCMAP 000a0000 12-17 10:26:13 [7072] MAGICNUM 6f483c94 12-17 10:26:13 [7072] ACFCOMP 12-17 10:26:13 [7072] LCP: SendConfigReq 12-17 10:26:13 [7072] ACFCOMP 12-17 10:26:13 [7072] PROTOCOMP 12-17 10:26:13 [7072] ACCMAP [6] 00000000 12-17 10:26:13 [7072] MRU [4] 1500 12-17 10:26:13 [7072] MAGICNUM [6] 6994f840 12-17 10:26:13 [7072] QUALPROTO (3000) 12-17 10:26:13 [7072] LCP: SendConfigAck(Stopped) 12-17 10:26:13 [7072] MRU 1522 12-17 10:26:13 [7072] ACCMAP 000a0000 12-17 10:26:13 [7072] MAGICNUM 6f483c94 12-17 10:26:13 [7072] ACFCOMP 12-17 10:26:13 [7072] LCP: state change Stopped --> Ack-Sent 12-17 10:26:13 [7072] LCP: Received Configure Reject (1) state = Ack-Sent (8) 12-17 10:26:13 [7072] LCP: RecvConfigRej. 12-17 10:26:13 [7072] QUALPROTO proto: c025, interval: 30000ms 12-17 10:26:13 [7072] LCP: SendConfigReq 12-17 10:26:13 [7072] ACFCOMP 12-17 10:26:13 [7072] PROTOCOMP 12-17 10:26:13 [7072] ACCMAP [6] 00000000 12-17 10:26:13 [7072] MRU [4] 1500 12-17 10:26:13 [7072] MAGICNUM [6] 6994f840 12-17 10:26:14 [7072] LCP: Received Configure Ack (2) state = Ack-Sent (8) 12-17 10:26:14 [7072] LCP: state change Ack-Sent --> Opend 12-17 10:26:14 [7072] LCP: LayerUp 12-17 10:26:14 [7072] Phase: Authenticate 12-17 10:26:14 [7072] his = 0, mine = 0 12-17 10:26:14 [7072] Phase: Network 12-17 10:26:14 [7072] IPCP: state change Initial --> Closed 12-17 10:26:14 [7072] IPCP Up event!! 12-17 10:26:14 [7072] IPCP: SendConfigReq 12-17 10:26:14 [7072] IPADDR [6] 206.66.13.72 12-17 10:26:14 [7072] COMPPROTO [6] 002d0f00 12-17 10:26:14 [7072] IPCP: state change Closed --> Req-Sent 12-17 10:26:14 [7072] CCP: state change Initial --> Closed 12-17 10:26:14 [7072] CCP Up event!! 12-17 10:26:14 [7072] CCP: SendConfigReq 12-17 10:26:14 [7072] CCP: state change Closed --> Req-Sent 12-17 10:26:14 [7072] IPCP: Received Configure Request (1) state = Req-Sent (6) 12-17 10:26:14 [7072] IPADDR[6] 192.168.224.21 12-17 10:26:14 [7072] COMPPROTO[6] 002d0f00 12-17 10:26:14 [7072] IPCP: SendConfigAck(Req-Sent) 12-17 10:26:14 [7072] IPADDR[6] 192.168.224.21 12-17 10:26:14 [7072] COMPPROTO[6] 002d0f00 12-17 10:26:14 [7072] IPCP: state change Req-Sent --> Ack-Sent 12-17 10:26:14 [7072] CCP: Received Configure Request (1) state = Req-Sent (6) 12-17 10:26:14 [7072] STAC[5] 12-17 10:26:14 [7072] CCP: SendConfigRej(Req-Sent) 12-17 10:26:14 [7072] STAC[5] 12-17 10:26:14 [7072] CCP: Received Configure Reject (1) state = Req-Sent (6) 12-17 10:26:14 [7072] CCP: RecvConfigRej. 12-17 10:26:14 [7072] PRED1[2] 12-17 10:26:14 [7072] CCP: SendConfigReq 12-17 10:26:14 [7072] LCP: Received Protocol Reject (20) state = Opend (9) 12-17 10:26:14 [7072] -- Protocol (c025) was rejected. 12-17 10:26:14 [7072] IPCP: Received Configure Nak (1) state = Ack-Sent (8) 12-17 10:26:14 [7072] IPADDR[6] 207.136.8.162 12-17 10:26:14 [7072] IPADDR[6] changing address: 206.66.13.72 --> 207.136.8.162 12-17 10:26:14 [7072] IPCP: SendConfigReq 12-17 10:26:14 [7072] IPADDR [6] 207.136.8.162 12-17 10:26:14 [7072] COMPPROTO [6] 002d0f00 12-17 10:26:14 [7072] CCP: Received Configure Request (2) state = Req-Sent (6) 12-17 10:26:14 [7072] CCP: SendConfigAck(Req-Sent) 12-17 10:26:14 [7072] CCP: state change Req-Sent --> Ack-Sent 12-17 10:26:14 [7072] CCP: Received Configure Ack (2) state = Ack-Sent (8) 12-17 10:26:14 [7072] CCP: state change Ack-Sent --> Opend 12-17 10:26:14 [7072] CCP: LayerUp. 12-17 10:26:14 [7072] myproto = 0, hisproto = 0 12-17 10:26:14 [7072] LCP: Received Echo Reply (3) state = Opend (9) 12-17 10:26:14 [7072] IPCP: Received Configure Ack (2) state = Ack-Sent (8) 12-17 10:26:14 [7072] IPCP: state change Ack-Sent --> Opend 12-17 10:26:14 [7072] IPCP: LayerUp. 12-17 10:26:14 [7072] myaddr = 207.136.8.162 hisaddr = 192.168.224.21 12-17 10:26:14 [7072] OsLinkup: 192.168.224.21 12-17 10:26:43 [7072] LCP: Received Echo Request (1) state = Opend (9) 12-17 10:26:43 [7072] LCP: SendEchoRep(Opend) 12-17 10:26:44 [7072] LCP: Received Echo Reply (4) state = Opend (9) 12-17 10:26:55 [7072] LCP: Received Protocol Reject (45) state = Opend (9) 12-17 10:26:55 [7072] -- Protocol (00fd) was rejected. 12-17 10:26:56 [7072] LCP: Received Protocol Reject (123) state = Opend (9) 12-17 10:26:56 [7072] -- Protocol (00fd) was rejected. ...Several thousand of these same message pairs omitted 12-17 10:37:15 [7092] LCP: Received Protocol Reject (123) state = Opend (9) 12-17 10:37:15 [7092] -- Protocol (00fd) was rejected. 12-17 10:37:15 [7092] LCP: LayerDown 12-17 10:37:15 [7092] OsLinkdown: 192.168.224.21 12-17 10:37:15 [7092] Phase: Terminate 12-17 10:37:15 [7092] LCP: SendTerminateReq. 12-17 10:37:15 [7092] LCP: state change Opend --> Closing 12-17 10:37:16 [7092] LCP: Received Terminate Ack (15) state = Closing (4) 12-17 10:37:16 [7092] LCP: state change Closing --> Closed 12-17 10:37:16 [7092] LCP: LayerFinish 12-17 10:37:16 [7092] Disconnected! 12-17 10:37:16 [7092] Connect time: 377 secs 12-17 10:37:16 [7092] Phase: Dead 12-17 10:37:16 [7092] LCP: state change Closed --> Initial 12-17 10:37:16 [7092] Phase: Dead 12-17 10:37:18 [7092] PPP Terminated. 12-17 10:37:23 [7115] Using interface: tun0 12-17 10:37:23 [7115] PPP Started. 12-17 10:38:53 [7115] PPP Terminated. >Fix: Until a code fix is found, issue the command "disable pred1" prior to placing a call, or use PAP instead of script dialing. >Audit-Trail: >Unformatted:
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