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Date: Mon, 25 Jan 2010 09:10:14 +0100 From: Eric Dumazet <eric.dumazet@...il.com> To: Curt Sampson <cjs@...rling-software.com>, linux-kernel@...r.kernel.org, Linux Netdev List <netdev@...r.kernel.org> Subject: Re: Problems Receiving UDP Broadcasts on Some Versions of Linux Le 25/01/2010 08:27, Curt Sampson a écrit : > I'm posting this here because it smells as if it may be something > a where a kernel network code developer might just say, "oh yeah, > obviously your problem is this." > > I'm not subscribed to this list, so please cc me on any replies. (The > Mail-followup-to header may do this automatically for you.) > > The short summary is that on two very similar servers on the same > network, an application that listens for broadcast UDP packets on a > given port works fine on the Ubuntu 8.04/Linux 2.6.24-26-server box but > does not receive the packets on the Ubuntu 9.04/Linux 2.6.28-17-server > box. I have confirmed that tcpdump sees identical packets being received > on both hosts. > > Did something change between these two kernel revisions that I need to > listen differently? > > Full details, including sample code, are available at: > > http://stackoverflow.com/questions/2130563/udp-broadcast-reception-problems-with-ubuntu-9-04-but-not-8-04 > > Thanks for any help you can give me. Even if you're not sure, but have > clues I should consider following up, feel free to e-mail me. I'm > also happy to take pointers to kernel code I should read, if there's > enlightenment there. > > cjs Hi Curt Could you post a sample of tcpdump trafic you receive on the 9.04 host, and your network config ? "ifconfig -a" -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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