From mboxrd@z Thu Jan 1 00:00:00 1970 From: Evgeniy Polyakov Subject: Re: sendfile()? Re: SO_LINGER dead: I get an immediate RST on 2.6.24? Date: Mon, 12 Jan 2009 02:18:59 +0300 Message-ID: <20090111231859.GA8309@ioremap.net> References: <20090111212303.GA8612@outpost.ds9a.nl> <175f5a0f0901111408s7905e5d9l2155b841f1ac054d@mail.gmail.com> <20090111224541.GA10848@outpost.ds9a.nl> <20090111225427.GA7004@ioremap.net> <20090111230824.GB10848@outpost.ds9a.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii To: bert hubert , "H. Willstrand" , netdev@vger.kernel.org Return-path: Received: from genesysrack.ru ([195.178.208.66]:49802 "EHLO tservice.net.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751249AbZAKXTC (ORCPT ); Sun, 11 Jan 2009 18:19:02 -0500 Content-Disposition: inline In-Reply-To: <20090111230824.GB10848@outpost.ds9a.nl> Sender: netdev-owner@vger.kernel.org List-ID: On Mon, Jan 12, 2009 at 12:08:24AM +0100, bert hubert (bert.hubert@netherlabs.nl) wrote: > I fully understand. Sometimes I have to talk to stupid devices though. What > I do find is the TCP_INFO ioctl, which offers this field in struct tcp_info: > > __u32 tcpi_unacked; > > Which comes from: > > struct tcp_sock { > ... > u32 packets_out; /* Packets which are "in flight" */ > ... > } > > If this becomes 0, perhaps this might tell me everything I sent was acked? 0 means that there are noin-flight packets, which is effectively number of unacked packets. So if your application waits for this field to become zero, it will wait for all sent packets to be acked. -- Evgeniy Polyakov