Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E8A9BC282DA for ; Fri, 12 Apr 2019 22:47:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B7DC0218A3 for ; Fri, 12 Apr 2019 22:47:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726931AbfDLWrz convert rfc822-to-8bit (ORCPT ); Fri, 12 Apr 2019 18:47:55 -0400 Received: from d.mail.sonic.net ([64.142.111.50]:56126 "EHLO d.mail.sonic.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726477AbfDLWry (ORCPT ); Fri, 12 Apr 2019 18:47:54 -0400 Received: from [192.168.42.66] (173-228-4-66.dsl.dynamic.fusionbroadband.com [173.228.4.66]) (authenticated bits=0) by d.mail.sonic.net (8.15.1/8.15.1) with ESMTPSA id x3CMlRoU016038 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Fri, 12 Apr 2019 15:47:28 -0700 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 11.5 \(3445.9.1\)) Subject: Re: gsmtap design/extensions? From: Guy Harris In-Reply-To: <196E881D-AB4A-4569-9C1F-5BCB41FE832F@alum.mit.edu> Date: Fri, 12 Apr 2019 15:47:26 -0700 Cc: Harald Welte , Vadim Yanitskiy , OpenBSC Mailing List , Sean Tranchetti , radiotap@netbsd.org, Dan Williams , netdev , linux-wireless@vger.kernel.org, Aleksander Morgado , Subash Abhinov Kasiviswanathan , =?utf-8?Q?Bj=C3=B8rn_Mork?= Content-Transfer-Encoding: 8BIT Message-Id: <1D6FE33B-DC15-47D8-A1AD-E95608300FDC@alum.mit.edu> References: <46474c61d7748042cc0a1f23773186786020638e.camel@sipsolutions.net> <20190410234555.GO25552@nataraja> <196E881D-AB4A-4569-9C1F-5BCB41FE832F@alum.mit.edu> To: Johannes Berg X-Mailer: Apple Mail (2.3445.9.1) X-Sonic-CAuth: UmFuZG9tSVYuvx4wRlhqOAwziRJKy/pPaTcADNtxSvHS62wnlMEKMcIq0VUolDJzTcNUrQLygw5kmnmHB61LEGdrr62f+N1s X-Sonic-ID: C;9jNs8nRd6RGRE6VsT+DgAQ== M;lL7A8nRd6RGRE6VsT+DgAQ== X-Sonic-Spam-Details: 0.0/5.0 by cerberusd Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org On Apr 12, 2019, at 12:54 PM, Guy Harris wrote: > I see nothing about a struct gsmtap_hdr: > > http://osmocom.org/projects/baseband/wiki/GSMTAP > > that... > > 2) would prevent it from being at the beginning of a LINKTYPE_GSMTAP/DLT_GSMTAP packet in a pcap or pcapng file. With a specification based on http://cgit.osmocom.org/libosmocore/plain/include/osmocom/core/gsmtap.h