From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-f51.google.com ([74.125.82.51]:56953 "EHLO mail-wg0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754311AbaISLJB (ORCPT ); Fri, 19 Sep 2014 07:09:01 -0400 Received: by mail-wg0-f51.google.com with SMTP id k14so2203487wgh.34 for ; Fri, 19 Sep 2014 04:09:00 -0700 (PDT) Date: Fri, 19 Sep 2014 13:08:55 +0200 From: Alexander Aring Subject: Re: 6lowpan raw socket problems Message-ID: <20140919110854.GA21364@omega> References: <0MXovv-1XrSix456F-00WrKR@mrelayeu.kundenserver.de> <20140918083259.GA3774@omega> <541A99D4.8080509@xsilon.com> <20140918084515.GB3774@omega> <20140918085433.GC3774@omega> <541A9FD3.2030104@xsilon.com> <20140918094401.GB4350@omega> <20140918094501.GC4350@omega> <541AE5E9.3000407@xsilon.com> <20140918141911.GA9262@omega> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20140918141911.GA9262@omega> Sender: linux-wpan-owner@vger.kernel.org List-ID: To: Simon Vincent Cc: linux-wpan@vger.kernel.org, werner@almesberger.net On Thu, Sep 18, 2014 at 04:19:11PM +0200, Alexander Aring wrote: > On Thu, Sep 18, 2014 at 03:02:17PM +0100, Simon Vincent wrote: > > I have created a small test program that shows this problem. It looks like a > > race condition as sometimes the addresses are not corrupt. > > > > Mhh maybe some used after freed and then we copy somewhere garbage sometimes. > Don't know right now. > > > It looks like if the RAW socket gets the packet before the packet hits the > > 6lowpan layer the addresses are fine. If the packet hits the 6lowpan layer > > before the RAW socket gets the packet then the addresses are corrupt. > > > > The test program can be found here. > > https://github.com/xsilon/sockdebug > > > > I will continue debugging! > > > ok, good luck. > I gave this now a try, how can I see the issue now? I see on output: recv_raw_icmp[fe80:0:41:c863:cdab:ffff:bbaa:aaaa%lowpan0->?] this address doesn't exist in my network. I can also upload wpan wireshark logs and lowpan wireshark logs, if you like. In sockdebug I changed also "const char* src_string =" to one of my lowpan addresses. Simon are you still here to debug this issue with me? :-) - Alex