From mboxrd@z Thu Jan 1 00:00:00 1970 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=-0.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 D5440C28CC1 for ; Sat, 1 Jun 2019 08:37:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 94C0327181 for ; Sat, 1 Jun 2019 08:37:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=web.de header.i=@web.de header.b="n2LRLS4L" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726794AbfFAIhk (ORCPT ); Sat, 1 Jun 2019 04:37:40 -0400 Received: from mout.web.de ([217.72.192.78]:37309 "EHLO mout.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726013AbfFAIhk (ORCPT ); Sat, 1 Jun 2019 04:37:40 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1559378254; bh=A2n9kAcES47/+bnZaoJNCVg0H4NW/A4A8Mo34xdoI5s=; h=X-UI-Sender-Class:Cc:References:Subject:To:From:Date:In-Reply-To; b=n2LRLS4L7+ZcfZepwiFtpMb6W0DU2Jt1IqTALuD6hChP5d/fSHXGJXXUb/SMGRQzg BasSLYHwQYU4fv/78A1EUuAER9HRKupCfwT42y+hTvq4GEZ0HUgpIaqwt5O+Ti/0G2 gl7lZ5RQOXsZarXAkhVoF37FQzHrWVbioBl0qOVc= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Received: from [192.168.1.4] ([93.133.68.189]) by smtp.web.de (mrweb102 [213.165.67.124]) with ESMTPSA (Nemesis) id 0LoYX0-1gv9rY02yA-00gZ2F; Sat, 01 Jun 2019 10:37:34 +0200 Cc: LKML References: <1556674718-5081-1-git-send-email-johunt@akamai.com> Subject: Re: ss: Checking efficient analysis for network connections To: Josh Hunt , David Ahern , Stephen Hemminger , netdev@vger.kernel.org From: Markus Elfring Openpgp: preference=signencrypt Autocrypt: addr=Markus.Elfring@web.de; prefer-encrypt=mutual; keydata= mQINBFg2+xABEADBJW2hoUoFXVFWTeKbqqif8VjszdMkriilx90WB5c0ddWQX14h6w5bT/A8 +v43YoGpDNyhgA0w9CEhuwfZrE91GocMtjLO67TAc2i2nxMc/FJRDI0OemO4VJ9RwID6ltwt mpVJgXGKkNJ1ey+QOXouzlErVvE2fRh+KXXN1Q7fSmTJlAW9XJYHS3BDHb0uRpymRSX3O+E2 lA87C7R8qAigPDZi6Z7UmwIA83ZMKXQ5stA0lhPyYgQcM7fh7V4ZYhnR0I5/qkUoxKpqaYLp YHBczVP+Zx/zHOM0KQphOMbU7X3c1pmMruoe6ti9uZzqZSLsF+NKXFEPBS665tQr66HJvZvY GMDlntZFAZ6xQvCC1r3MGoxEC1tuEa24vPCC9RZ9wk2sY5Csbva0WwYv3WKRZZBv8eIhGMxs rcpeGShRFyZ/0BYO53wZAPV1pEhGLLxd8eLN/nEWjJE0ejakPC1H/mt5F+yQBJAzz9JzbToU 5jKLu0SugNI18MspJut8AiA1M44CIWrNHXvWsQ+nnBKHDHHYZu7MoXlOmB32ndsfPthR3GSv jN7YD4Ad724H8fhRijmC1+RpuSce7w2JLj5cYj4MlccmNb8YUxsE8brY2WkXQYS8Ivse39MX BE66MQN0r5DQ6oqgoJ4gHIVBUv/ZwgcmUNS5gQkNCFA0dWXznQARAQABtCZNYXJrdXMgRWxm cmluZyA8TWFya3VzLkVsZnJpbmdAd2ViLmRlPokCVAQTAQgAPhYhBHDP0hzibeXjwQ/ITuU9 Figxg9azBQJYNvsQAhsjBQkJZgGABQsJCAcCBhUICQoLAgQWAgMBAh4BAheAAAoJEOU9Figx g9azcyMP/iVihZkZ4VyH3/wlV3nRiXvSreqg+pGPI3c8J6DjP9zvz7QHN35zWM++1yNek7Ar OVXwuKBo18ASlYzZPTFJZwQQdkZSV+atwIzG3US50ZZ4p7VyUuDuQQVVqFlaf6qZOkwHSnk+ CeGxlDz1POSHY17VbJG2CzPuqMfgBtqIU1dODFLpFq4oIAwEOG6fxRa59qbsTLXxyw+PzRaR LIjVOit28raM83Efk07JKow8URb4u1n7k9RGAcnsM5/WMLRbDYjWTx0lJ2WO9zYwPgRykhn2 sOyJVXk9xVESGTwEPbTtfHM+4x0n0gC6GzfTMvwvZ9G6xoM0S4/+lgbaaa9t5tT/PrsvJiob kfqDrPbmSwr2G5mHnSM9M7B+w8odjmQFOwAjfcxoVIHxC4Cl/GAAKsX3KNKTspCHR0Yag78w i8duH/eEd4tB8twcqCi3aCgWoIrhjNS0myusmuA89kAWFFW5z26qNCOefovCx8drdMXQfMYv g5lRk821ZCNBosfRUvcMXoY6lTwHLIDrEfkJQtjxfdTlWQdwr0mM5ye7vd83AManSQwutgpI q+wE8CNY2VN9xAlE7OhcmWXlnAw3MJLW863SXdGlnkA3N+U4BoKQSIToGuXARQ14IMNvfeKX NphLPpUUnUNdfxAHu/S3tPTc/E/oePbHo794dnEm57LuuQINBFg2+xABEADZg/T+4o5qj4cw nd0G5pFy7ACxk28mSrLuva9tyzqPgRZ2bdPiwNXJUvBg1es2u81urekeUvGvnERB/TKekp25 4wU3I2lEhIXj5NVdLc6eU5czZQs4YEZbu1U5iqhhZmKhlLrhLlZv2whLOXRlLwi4jAzXIZAu 76mT813jbczl2dwxFxcT8XRzk9+dwzNTdOg75683uinMgskiiul+dzd6sumdOhRZR7YBT+xC wzfykOgBKnzfFscMwKR0iuHNB+VdEnZw80XGZi4N1ku81DHxmo2HG3icg7CwO1ih2jx8ik0r riIyMhJrTXgR1hF6kQnX7p2mXe6K0s8tQFK0ZZmYpZuGYYsV05OvU8yqrRVL/GYvy4Xgplm3 DuMuC7/A9/BfmxZVEPAS1gW6QQ8vSO4zf60zREKoSNYeiv+tURM2KOEj8tCMZN3k3sNASfoG fMvTvOjT0yzMbJsI1jwLwy5uA2JVdSLoWzBD8awZ2X/eCU9YDZeGuWmxzIHvkuMj8FfX8cK/ 2m437UA877eqmcgiEy/3B7XeHUipOL83gjfq4ETzVmxVswkVvZvR6j2blQVr+MhCZPq83Ota xNB7QptPxJuNRZ49gtT6uQkyGI+2daXqkj/Mot5tKxNKtM1Vbr/3b+AEMA7qLz7QjhgGJcie qp4b0gELjY1Oe9dBAXMiDwARAQABiQI8BBgBCAAmFiEEcM/SHOJt5ePBD8hO5T0WKDGD1rMF Alg2+xACGwwFCQlmAYAACgkQ5T0WKDGD1rOYSw/+P6fYSZjTJDAl9XNfXRjRRyJSfaw6N1pA Ahuu0MIa3djFRuFCrAHUaaFZf5V2iW5xhGnrhDwE1Ksf7tlstSne/G0a+Ef7vhUyeTn6U/0m +/BrsCsBUXhqeNuraGUtaleatQijXfuemUwgB+mE3B0SobE601XLo6MYIhPh8MG32MKO5kOY hB5jzyor7WoN3ETVNQoGgMzPVWIRElwpcXr+yGoTLAOpG7nkAUBBj9n9TPpSdt/npfok9ZfL /Q+ranrxb2Cy4tvOPxeVfR58XveX85ICrW9VHPVq9sJf/a24bMm6+qEg1V/G7u/AM3fM8U2m tdrTqOrfxklZ7beppGKzC1/WLrcr072vrdiN0icyOHQlfWmaPv0pUnW3AwtiMYngT96BevfA qlwaymjPTvH+cTXScnbydfOQW8220JQwykUe+sHRZfAF5TS2YCkQvsyf7vIpSqo/ttDk4+xc Z/wsLiWTgKlih2QYULvW61XU+mWsK8+ZlYUrRMpkauN4CJ5yTpvp+Orcz5KixHQmc5tbkLWf x0n1QFc1xxJhbzN+r9djSGGN/5IBDfUqSANC8cWzHpWaHmSuU3JSAMB/N+yQjIad2ztTckZY pwT6oxng29LzZspTYUEzMz3wK2jQHw+U66qBFk8whA7B2uAU1QdGyPgahLYSOa4XAEGb6wbI FEE= Message-ID: <3d1c67c8-7dfe-905b-4548-dae23592edc5@web.de> Date: Sat, 1 Jun 2019 10:36:40 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.0 MIME-Version: 1.0 In-Reply-To: <1556674718-5081-1-git-send-email-johunt@akamai.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-GB X-Provags-ID: V03:K1:zahEED2aGN6akXRv9OgQBi63qvgAKWx2Q4CBAVAYjHaUWe43rr9 3OAjYchsT1vbigmaiTEkyS2m6ICn9k7XRL/nv5AwKB1A1L24/GEP67tJ5I7WdvzD2Dq9XJ9 GXX/tVg8RTOiIeYJpN0HKSzUF5jPQFVtPXyrCGneY7ACadbdFGlvRhxk6Uad2qyTzJjyUjL h5W6jqrvSi335Sdd/0/ew== X-UI-Out-Filterresults: notjunk:1;V03:K0:p4Nii7LVxbg=:vIoq/L1wVlLwmF+qYKUQob sUWNcrMbyfgfzobahVaO7tGv6poILnAigXgUUzOe32oAvwy5hqlNLDRJv/t58+Awp/avRS1ii HGxP+eWk64dxadUYJ3EVdZn2c8y1VOidhXaXPEXcXxxobz9ciHqkBwy5BCG6XUq3FSNg85GE1 207J9jJpqeR+tLXsI4AjcPc1mlatPdPQOrUkv0vA2pCa0swCX/Rhw7xINM62TcUJloU7jLNTg GB7v3gKXy8wkP75Sq+7Ei2H6eANLlvpgWym1tr6CczUMwogN6bGkZ7ZzfTXu0uG6mLux/sMgl h/MroRbkRDMqxr43fnn+6Q5yYpvxF7pkeHfUG8kAX8LDdNnOEmtOn/rsnqon2PuJMRFmey6vh fv5EJ6u+Dv7D0hw9nYNIEGmFoLUmj+fwDbJBBgqmOHn4NPs6VrFaYRirUwrQg6SrwM7x2FFTu +qMc3dWZg5oGxhH1fVLS7Yls76Naayrr/hFlODuMWt2ZhGfjsIlZMLSfjRBIRHP7i5QTDyZsa +b8Zhk/8fjvmYn5EkhHT4r5N8QJBodGMzvyIm9nYp/xGuwDIIKajvzmmWzaSZfxm4svqaImfK MnxlsGhMyzHe7NW8VUbtK3RoGF3gc5/UOwlUz8taVD6yrvP1hUXgdEy53qjaxlkV6++wLgytO chHocfK436ZamocYzvaIev8SBLv8YV1up1ljWZEQEeb0AC62iaVozeCxQJyFHYWjZ9z2iyXxI k462v6nOHaT+4lVr7AzcTUSoQ+g+fjQFh+zPy87PaabuLWan7eLuU8M0CoBKK8w/gqprNOKyY MIM8MsgkywPqblcjQ5ZDruF4DUy80fJEyWr1a7xOAkWh4npGzoXJhnwleyFaPSVzowEJkYpCO C76SBf5wLe6LB4Om6cugkf7upWXTgwDys915r24OmtIhl9qEl1R6yzamU458R0YLa/uWkQTM1 fy2YgkUxcqsAwRX8cPZeYP8nWrW8g66/ZxzF4q2HTPcWsWUaa4VXs Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Multi-line output in ss makes it difficult to search for things with grep. I became more concerned about efficient data processing for the provided information. There are further software development possibilities to consider, aren't there? The chosen data formats influence the software situation considerably. * Information is exported together with extra space characters. Other field delimiters can occasionally be nicer. * Regular expressions are useful to extract data from text lines. But other programming interfaces are safer to work with data structures. The mentioned program can be used to filter the provided input. But if you would like to work with information from the filtered records, you would need to repeat some data processing by the calling process so that items will be converted into structured elements. Would you like to avoid duplicate work? I imagine then that it would be also nicer to perform filtering based on configurable constraints at the data source directly. How much can Linux help more in this software area? How do you think about such ideas? Regards, Markus