From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754633Ab2D1RiP (ORCPT ); Sat, 28 Apr 2012 13:38:15 -0400 Received: from plane.gmane.org ([80.91.229.3]:56835 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752743Ab2D1RiO (ORCPT ); Sat, 28 Apr 2012 13:38:14 -0400 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: "Mantas M." Subject: "martian source" mixes up source and destination Date: Sat, 28 Apr 2012 20:37:57 +0300 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: 78-60-211-195.static.zebra.lt User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120426 Thunderbird/12.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org After enabling the /proc/sys/net/ipv4/conf/all/log_martians sysctl, I've been receiving the following messages on dmesg: > martian source 255.255.255.255 from 192.168.1.115, on dev wlan0 > ll header: ff:ff:ff:ff:ff:ff:f4:6d:04:85:fc:d7:08:00 > martian source 192.168.1.255 from 192.168.1.115, on dev wlan0 > ll header: ff:ff:ff:ff:ff:ff:f4:6d:04:85:fc:d7:08:00 > martian source 192.168.1.255 from 192.168.1.115, on dev wlan0 > ll header: ff:ff:ff:ff:ff:ff:f4:6d:04:85:fc:d7:08:00 > > martian source 255.255.255.255 from 192.168.1.183, on dev eth0 > ll header: ff:ff:ff:ff:ff:ff:48:5d:60:e8:65:8f:08:00 However, the packets are *not* martians, but legitimate broadcast UDP/IPv4 packets: they have the *destination* as 255.255.255.255 or 192.168.1.255, with the source being 192.168.1.115 (wlan0 on this device) for the first three packets, and 192.168.1.183 (eth0) on the fourth. Linux 3.3.4-1-ARCH on Arch Linux -- Mantas M.