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Date:      Mon, 2 Dec 2002 10:09:50 -0800 (PST)
From:      Archie Cobbs <archie@dellroad.org>
To:        Randy Bush <randy@psg.com>
Cc:        FreeBSD Stable <freebsd-stable@FreeBSD.org>
Subject:   Re: ppp - Magic is same
Message-ID:  <200212021809.gB2I9oiQ046961@arch20m.dellroad.org>
In-Reply-To: <E18IBnJ-0005wb-00@roam.psg.com>

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Randy Bush wrote:
> ppp from a 4.7-stable system to a 4.7-stable system
> 
> if i hang up and then call back within 15 minutes or so, i get
> 
>     ppp[21876]: tun0: Phase: deflink: login -> lcp 
>     ppp[21876]: tun0: LCP: FSM: Using "deflink" as a transport 
>     ppp[21876]: tun0: LCP: deflink: State change Initial --> Closed 
>     ppp[21876]: tun0: Phase: deflink: Entering STOPPED state for 3 seconds 
>     ppp[21876]: tun0: LCP: deflink: State change Closed --> Stopped 
>     ppp[21876]: tun0: LCP: deflink: LayerStart 
>     ppp[21876]: tun0: LCP: deflink: SendConfigReq(1) state = Stopped 
>     ppp[21876]: tun0: LCP:  ACFCOMP[2] 
>     ppp[21876]: tun0: LCP:  PROTOCOMP[2] 
>     ppp[21876]: tun0: LCP:  ACCMAP[6] 0x00000000 
>     ppp[21876]: tun0: LCP:  MRU[4] 1500 
>     ppp[21876]: tun0: LCP:  MAGICNUM[6] 0xb4ca4b58 
>     ppp[21876]: tun0: LCP: deflink: State change Stopped --> Req-Sent 
>     ppp[21876]: tun0: LCP: deflink: RecvConfigReq(1) state = Req-Sent 
>     ppp[21876]: tun0: LCP:  ACFCOMP[2] 
>     ppp[21876]: tun0: LCP:  PROTOCOMP[2] 
>     ppp[21876]: tun0: LCP:  ACCMAP[6] 0x00000000 
>     ppp[21876]: tun0: LCP:  MRU[4] 1500 
>     ppp[21876]: tun0: LCP:  MAGICNUM[6] 0xb4ca4b58 
>     ppp[21876]: tun0: LCP: Magic is same (b4ca4b58) - 1 times 

This means that the ppp daemon is talking to itself, i.e., your modem
is echoing back everything so ppp receives its own transmissions.
This is exactly the situation that 'magic numbers' were designed to
detect. Not sure how to fix this in your case but there's a clue anyway.

-Archie

__________________________________________________________________________
Archie Cobbs     *     Packet Design     *     http://www.packetdesign.com

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