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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 E3D86C433DB for ; Fri, 26 Mar 2021 23:46:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C5C4B61958 for ; Fri, 26 Mar 2021 23:46:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230294AbhCZXqV (ORCPT ); Fri, 26 Mar 2021 19:46:21 -0400 Received: from 75-101-100-43.dsl.static.fusionbroadband.com ([75.101.100.43]:57794 "EHLO hop.toad.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229969AbhCZXpv (ORCPT ); Fri, 26 Mar 2021 19:45:51 -0400 Received: from hop.toad.com (localhost [127.0.0.1]) by hop.toad.com (8.12.9/8.12.9) with ESMTP id 12QNjcRl023509; Fri, 26 Mar 2021 16:45:38 -0700 To: Seth David Schoen cc: Florian Weimer , linux-man@vger.kernel.org, gnu@toad.com Subject: Re: [PATCH 1/1] ip.7: Add "special and reserved addresses" section In-reply-to: <20210326225305.GB10062@frotz.zork.net> References: <20210320002041.GZ2289@frotz.zork.net> <87ft0pzjtk.fsf@mid.deneb.enyo.de> <20210322175815.GX10062@frotz.zork.net> <87blb9q7ok.fsf@mid.deneb.enyo.de> <20210324191858.GP10062@frotz.zork.net> <20210326225305.GB10062@frotz.zork.net> Comments: In-reply-to Seth David Schoen message dated "Fri, 26 Mar 2021 15:53:05 -0700." Date: Fri, 26 Mar 2021 16:45:38 -0700 Message-ID: <23508.1616802338@hop.toad.com> From: John Gilmore Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org > > > Are there network devices that are neither point-to-point, nor do they > > > have broadcast support? It seems to me that cellular radio systems are neither point-to-point, nor do they support broadcast. And they keep moving further and further toward being IP-based (e.g. phone calls on your LTE phone use SIP over UDP over IP over cellular!). But given the proprietary nature of most cellphone radio chips and their firmware, it's possible that Linux has never built a fully capable network interface to talk to them. I don't think we should attempt to rule it out, though. John