From owner-svn-src-head@freebsd.org Fri Oct 30 13:32:59 2020 Return-Path: Delivered-To: svn-src-head@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 7A3BC452377; Fri, 30 Oct 2020 13:32:59 +0000 (UTC) (envelope-from mhorne@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4CN3Cb2KrCz401S; Fri, 30 Oct 2020 13:32:59 +0000 (UTC) (envelope-from mhorne@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 333A416FCF; Fri, 30 Oct 2020 13:32:59 +0000 (UTC) (envelope-from mhorne@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 09UDWxti041815; Fri, 30 Oct 2020 13:32:59 GMT (envelope-from mhorne@FreeBSD.org) Received: (from mhorne@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 09UDWxBQ041814; Fri, 30 Oct 2020 13:32:59 GMT (envelope-from mhorne@FreeBSD.org) Message-Id: <202010301332.09UDWxBQ041814@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mhorne set sender to mhorne@FreeBSD.org using -f From: Mitchell Horne Date: Fri, 30 Oct 2020 13:32:59 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r367163 - head/sys/net X-SVN-Group: head X-SVN-Commit-Author: mhorne X-SVN-Commit-Paths: head/sys/net X-SVN-Commit-Revision: 367163 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Oct 2020 13:32:59 -0000 Author: mhorne Date: Fri Oct 30 13:32:58 2020 New Revision: 367163 URL: https://svnweb.freebsd.org/changeset/base/367163 Log: net: add ETHER_IS_IPV6_MULTICAST This can be used to detect if an ethernet address is specifically an IPv6 multicast address, defined in accordance to RFC 2464. ETHER_IS_MULTICAST is still preferred in the general case. Reviewed by: ae Sponsored by: NetApp, Inc. Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D26611 Modified: head/sys/net/ethernet.h Modified: head/sys/net/ethernet.h ============================================================================== --- head/sys/net/ethernet.h Fri Oct 30 10:46:35 2020 (r367162) +++ head/sys/net/ethernet.h Fri Oct 30 13:32:58 2020 (r367163) @@ -71,6 +71,8 @@ struct ether_addr { } __packed; #define ETHER_IS_MULTICAST(addr) (*(addr) & 0x01) /* is address mcast/bcast? */ +#define ETHER_IS_IPV6_MULTICAST(addr) \ + (((addr)[0] == 0x33) && ((addr)[1] == 0x33)) #define ETHER_IS_BROADCAST(addr) \ (((addr)[0] & (addr)[1] & (addr)[2] & \ (addr)[3] & (addr)[4] & (addr)[5]) == 0xff)