From owner-freebsd-net@FreeBSD.ORG Sat Feb 18 18:06:53 2006 Return-Path: X-Original-To: freebsd-net@freebsd.org Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B9D8216A420 for ; Sat, 18 Feb 2006 18:06:53 +0000 (GMT) (envelope-from rosti.bsd@gmail.com) Received: from uproxy.gmail.com (uproxy.gmail.com [66.249.92.194]) by mx1.FreeBSD.org (Postfix) with ESMTP id 058FD43D48 for ; Sat, 18 Feb 2006 18:06:52 +0000 (GMT) (envelope-from rosti.bsd@gmail.com) Received: by uproxy.gmail.com with SMTP id u40so394790ugc for ; Sat, 18 Feb 2006 10:06:51 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:date:from:to:subject:message-id:x-mailer:mime-version:content-type:content-transfer-encoding; b=dDXZTmSMkV2t+/hDVY2wssFsjVEK9skfLRWIji8NaRW9Dys9XME7JTzCsS5uFTR0Y3QGR5oVezhP92nNcMbz56ICpe9xXvN/QygI1QVmo6L14s1DM7rjNsm+y6YA2JatD21RZWZ/ZqghxZwx9pJvbwM89C2QRnlYNLhhOf0xe9o= Received: by 10.66.250.9 with SMTP id x9mr1805898ugh; Sat, 18 Feb 2006 10:06:40 -0800 (PST) Received: from saturn.lan ( [212.143.154.227]) by mx.gmail.com with ESMTP id k1sm2050166ugf.2006.02.18.10.06.26; Sat, 18 Feb 2006 10:06:40 -0800 (PST) Date: Sat, 18 Feb 2006 20:05:34 +0200 From: Rostislav Krasny To: freebsd-net@freebsd.org Message-Id: <20060218200534.7e6bc04b.rosti.bsd@gmail.com> X-Mailer: Sylpheed version 2.2.0 (GTK+ 2.8.12; i386-portbld-freebsd6.1) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Subject: RES_DFLRETRY in resolv.h X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 18 Feb 2006 18:06:53 -0000 Hi, According to resolver(5) manual page the number of times the resolver will send a query to each of its name servers before giving up and returning an error to the calling application is a RES_DFLRETRY defined in resolv.h. For years FreeBSD had no RES_DFLRETRY macro defined in resolv.h and had used a hardcoded constant, until Yar Tikhiy fixed it: http://docs.freebsd.org/cgi/mid.cgi?200409091739.i89HdlwM019548 http://docs.freebsd.org/cgi/mid.cgi?200409091742.i89HgIan019681 http://docs.freebsd.org/cgi/mid.cgi?200409091719.i89HJRGu019026 Other systems and BIND9's internal resolver define the RES_DFLRETRY as 2, but in FreeBSD that macro is 4. Why it's so big? I think it had been inherited from old BIND4's resolver. Could the RES_DFLRETRY be decreased from 4 to 2 ? Current value of RES_DFLRETRY can make host unreachable. Read a bin/62139 PR and "SSH login takes very long time...sometimes" threads on freebsd-stable mailing list. Thanks