From patchwork Sun Jun 3 21:54:34 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Subash Abhinov Kasiviswanathan X-Patchwork-Id: 924764 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=codeaurora.org header.i=@codeaurora.org header.b="W/T6D9bu"; dkim=pass (1024-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="IaFSeBeI"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 40zX1K6y6Bz9ry1 for ; Mon, 4 Jun 2018 07:55:17 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751273AbeFCVzI (ORCPT ); Sun, 3 Jun 2018 17:55:08 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:43456 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751159AbeFCVzH (ORCPT ); Sun, 3 Jun 2018 17:55:07 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id E3BDA607B4; Sun, 3 Jun 2018 21:55:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1528062906; bh=IE5Lcb4OLJuGc/IX6N3zkIWhkTi1yrybtwgrSxIvlH0=; h=From:To:Cc:Subject:Date:From; b=W/T6D9buHqqmxeXRZn/Hh8p8FJcbvudZcuHwK+HB0nOGZUSoNSZynPcjJSrKvEKjn 6WMk7IOlVUWiZ/gwAYG6C5odm7p7KKISMSaNITVAk6xMqHIsAezMcPYpnVv+bMW+YV OpDSMdvuVTg1cZ7QOWktXIl/vBvOjNssw1dHyVL4= X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=2.0 tests=ALL_TRUSTED,BAYES_00, DKIM_SIGNED, T_DKIM_INVALID autolearn=no autolearn_force=no version=3.4.0 Received: from subashab-lnx.qualcomm.com (unknown [129.46.15.92]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: subashab@codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 075EB605BD; Sun, 3 Jun 2018 21:55:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1528062903; bh=IE5Lcb4OLJuGc/IX6N3zkIWhkTi1yrybtwgrSxIvlH0=; h=From:To:Cc:Subject:Date:From; b=IaFSeBeI4LjcNJdT9HbZn0AnXNmQ+3BJ1R7M+NB2pnDIVDRb8KXEme9rXC9Plpuc2 /MOCjUk33CP14vSZQSiBXhYjQnOtBSIX2RfiPbGSjli9/quVLJGUy8OSS5jq6LlRjU f5yDPUAmW/votYc28i705MmLvGlYxI9+NRT1bmSI= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 075EB605BD Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=subashab@codeaurora.org From: Subash Abhinov Kasiviswanathan To: davem@davemloft.net, netdev@vger.kernel.org Cc: Subash Abhinov Kasiviswanathan Subject: [PATCH net-next] net: ipv6: Generate random IID for addresses on RAWIP devices Date: Sun, 3 Jun 2018 15:54:34 -0600 Message-Id: <1528062874-19250-1-git-send-email-subashab@codeaurora.org> X-Mailer: git-send-email 1.9.1 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org RAWIP devices such as rmnet do not have a hardware address and instead require the kernel to generate a random IID for the temporary addresses. For permanent addresses, the device IID is used along with prefix received. Signed-off-by: Subash Abhinov Kasiviswanathan --- net/ipv6/addrconf.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index f09afc2..e4c4540 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -2230,6 +2230,18 @@ static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev) return 0; } +static int addrconf_ifid_rawip(u8 *eui, struct net_device *dev) +{ + struct in6_addr lladdr; + + if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE)) + get_random_bytes(eui, 8); + else + memcpy(eui, lladdr.s6_addr + 8, 8); + + return 0; +} + static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) { switch (dev->type) { @@ -2252,6 +2264,8 @@ static int ipv6_generate_eui64(u8 *eui, struct net_device *dev) case ARPHRD_TUNNEL6: case ARPHRD_IP6GRE: return addrconf_ifid_ip6tnl(eui, dev); + case ARPHRD_RAWIP: + return addrconf_ifid_rawip(eui, dev); } return -1; } @@ -3286,7 +3300,8 @@ static void addrconf_dev_config(struct net_device *dev) (dev->type != ARPHRD_IP6GRE) && (dev->type != ARPHRD_IPGRE) && (dev->type != ARPHRD_TUNNEL) && - (dev->type != ARPHRD_NONE)) { + (dev->type != ARPHRD_NONE) && + (dev->type != ARPHRD_RAWIP)) { /* Alas, we support only Ethernet autoconfiguration. */ return; }