From mboxrd@z Thu Jan 1 00:00:00 1970 From: Cong Wang Subject: Re: udp packet not reach application Date: Tue, 30 Apr 2013 02:15:24 +0000 (UTC) Message-ID: References: <517AC60F.9010609@gmail.com> <517E7746.6040802@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit To: netdev@vger.kernel.org Return-path: Received: from plane.gmane.org ([80.91.229.3]:43807 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757025Ab3D3CPk (ORCPT ); Mon, 29 Apr 2013 22:15:40 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1UX06V-0001kI-PE for netdev@vger.kernel.org; Tue, 30 Apr 2013 04:15:39 +0200 Received: from 182.241.5.9 ([182.241.5.9]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 30 Apr 2013 04:15:39 +0200 Received: from xiyou.wangcong by 182.241.5.9 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 30 Apr 2013 04:15:39 +0200 Sender: netdev-owner@vger.kernel.org List-ID: On Mon, 29 Apr 2013 at 13:36 GMT, Min Wang wrote: > > At first, it was working as my app did get udp traffic. > > After a while, strace showed that my app stuck at recvfrom, no udp traffic. > > But tcpdump did show that the udp traffic was still coming/alive. > Try dropwatch to see where the packets get dropped.