From owner-freebsd-net@FreeBSD.ORG Mon Apr 27 17:43:40 2015 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 9FB6199C for ; Mon, 27 Apr 2015 17:43:40 +0000 (UTC) Received: from mail-la0-x230.google.com (mail-la0-x230.google.com [IPv6:2a00:1450:4010:c03::230]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 297DB145D for ; Mon, 27 Apr 2015 17:43:40 +0000 (UTC) Received: by labbd9 with SMTP id bd9so85720554lab.2 for ; Mon, 27 Apr 2015 10:43:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=Alzxp+Uk6QFWT1F6IGvhLy/5QvE93muEC2EjUkbT/HM=; b=VSlJx9DDoDJh9t9lBjWBdl+STo6AjnNgo05AdRyb7Ufobo1+GFWCMHSY7Pay5JPw9l lVIod3qhNzUDahWcSz1cR0hoXG70P+NAS59iCbqWsvcYtjso0rzJU1t07yTtKNvELfec AuFh0ZgAwyBMuPkTtl0m38gJklYxHRwS3/Y/yiYtHW1ZD+eWzClwY/g1K40k/r19H8Oe t7UAGhDAfWEzPlZO4RD92LLK87lshrIf5Up/JzwQxAJEc+SXLiAY7VrzwZWwL4v4uk3p Yyxrmdj9aQla3TYCChz34H+vgPpZ4BCTnEXxoQQQXwWyYTaTke/FhdZcdGZm2ILZILqI UW4A== MIME-Version: 1.0 X-Received: by 10.152.116.49 with SMTP id jt17mr11012287lab.82.1430156617103; Mon, 27 Apr 2015 10:43:37 -0700 (PDT) Received: by 10.114.202.229 with HTTP; Mon, 27 Apr 2015 10:43:37 -0700 (PDT) Date: Mon, 27 Apr 2015 20:43:37 +0300 Message-ID: Subject: Calculating ACK arrival time From: Karlis Laivins To: freebsd-net@freebsd.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 27 Apr 2015 17:43:40 -0000 Hello, What would be the best (and easiest) way to calculate the arrival time (the time period that the ACK travels from receiver to sender of the ACK'ed data) for a NewReno ACK message? Can the h_ertt module be used to do it? Thank you in advance! Best Regards, Karlis