From owner-svn-src-stable-7@FreeBSD.ORG Thu Jul 7 09:42:33 2011 Return-Path: Delivered-To: svn-src-stable-7@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 1E4111065672; Thu, 7 Jul 2011 09:42:33 +0000 (UTC) (envelope-from ae@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id 0E7668FC18; Thu, 7 Jul 2011 09:42:33 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id p679gWhI056069; Thu, 7 Jul 2011 09:42:32 GMT (envelope-from ae@svn.freebsd.org) Received: (from ae@localhost) by svn.freebsd.org (8.14.4/8.14.4/Submit) id p679gWmQ056067; Thu, 7 Jul 2011 09:42:32 GMT (envelope-from ae@svn.freebsd.org) Message-Id: <201107070942.p679gWmQ056067@svn.freebsd.org> From: "Andrey V. Elsukov" Date: Thu, 7 Jul 2011 09:42:32 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-7@freebsd.org X-SVN-Group: stable-7 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r223837 - stable/7/sys/netinet X-BeenThere: svn-src-stable-7@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for only the 7-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Jul 2011 09:42:33 -0000 Author: ae Date: Thu Jul 7 09:42:32 2011 New Revision: 223837 URL: http://svn.freebsd.org/changeset/base/223837 Log: MFC r222806: Make a behaviour of the libalias based in-kernel NAT a bit closer to how natd(8) does work. natd(8) drops packets only when libalias returns PKT_ALIAS_IGNORED and "deny_incoming" option is set, but ipfw_nat always did drop packets that were not aliased, even if they should not be aliased and just are going through. PR: kern/122109, kern/129093, kern/157379 Submitted by: Alexander V. Chernikov (previous version) Modified: stable/7/sys/netinet/ip_fw_nat.c Directory Properties: stable/7/sys/ (props changed) stable/7/sys/cddl/contrib/opensolaris/ (props changed) stable/7/sys/contrib/dev/acpica/ (props changed) stable/7/sys/contrib/pf/ (props changed) Modified: stable/7/sys/netinet/ip_fw_nat.c ============================================================================== --- stable/7/sys/netinet/ip_fw_nat.c Thu Jul 7 09:32:43 2011 (r223836) +++ stable/7/sys/netinet/ip_fw_nat.c Thu Jul 7 09:42:32 2011 (r223837) @@ -322,8 +322,18 @@ ipfw_nat(struct ip_fw_args *args, struct else retval = LibAliasOut(t->lib, c, mcl->m_len + M_TRAILINGSPACE(mcl)); - if (retval != PKT_ALIAS_OK && - retval != PKT_ALIAS_FOUND_HEADER_FRAGMENT) { + /* + * We drop packet when: + * 1. libalias returns PKT_ALIAS_ERROR; + * 2. For incoming packets: + * a) for unresolved fragments; + * b) libalias returns PKT_ALIAS_IGNORED and + * PKT_ALIAS_DENY_INCOMING flag is set. + */ + if (retval == PKT_ALIAS_ERROR || + (args->oif == NULL && (retval == PKT_ALIAS_UNRESOLVED_FRAGMENT || + (retval == PKT_ALIAS_IGNORED && + (t->lib->packetAliasMode & PKT_ALIAS_DENY_INCOMING) != 0)))) { /* XXX - should i add some logging? */ m_free(mcl); badnat: