netdev - Re: problems with L2TP

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Message-ID: <CAKaJLVvft6HjFH+qAr4taD4bEis4SCtTSbvmDYuGz9=1boQvJA@mail.gmail.com>
Date:	Thu, 9 Jul 2015 12:16:47 +0300
From:	Sam Protsenko <semen.protsenko@...aro.org>
To:	James Chapman <jchapman@...alix.com>
Cc:	Tom Parkin <tparkin@...alix.com>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	Sumit Semwal <sumit.semwal@...aro.org>
Subject: Re: problems with L2TP

> Tom and I discussed this and we're not clear what you are running. Have
> you changed create_pppox() in mtpd with the code fragment from your
> original mail?

Here is the commit for mtpd where I'm changing Android L2TP
implementation to mainline implementation:
http://git.linaro.org/people/semen.protsenko/mtpd.git/blobdiff/27a25e28b7c84d3f49c50a3e7b1fc3a46ac4ff51..01265f20617e7f3ca041e55dbf557912a0ecebd5:/l2tp_up.c

> Are you sure that your modified mtpd gets the correct
> local/remote tunnel-id and session-id to make its connect() call?

Judging from xl2tpd and mtpd logs, they are actually different. Seems
like this is actual issue. But I still didn't figured why it's
happening.
As I understand, mtpd should have the same values for remote
tunnel-id/session-id as xl2tpd has for local ones, but it's not the
case for my code.
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