From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BA787C76195 for ; Mon, 15 Jul 2019 14:41:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 869C0205ED for ; Mon, 15 Jul 2019 14:41:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563201706; bh=k6hq1JSeyIt+lIV8T06m/B9W6PrT0IV/AV1f4Wnq6TU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=eB9VmGpVtLT1Br2USAo+HXutS1uVBvW9ZcRQFaEttUHMhm75l9ntJEnmm7N3pLrzE aVguzsKnNGZxNA+HR++FJazBhs3GVftOyR8gApNX0GFN0p6A23KIWb1tqr7fhGQHUl FCaWcG3ouIlcbVw3AJmnaXcz6/69YnrDs/a+ErsU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404876AbfGOOlS (ORCPT ); Mon, 15 Jul 2019 10:41:18 -0400 Received: from mail.kernel.org ([198.145.29.99]:43904 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404853AbfGOOlN (ORCPT ); Mon, 15 Jul 2019 10:41:13 -0400 Received: from sasha-vm.mshome.net (unknown [73.61.17.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 32241205ED; Mon, 15 Jul 2019 14:41:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563201672; bh=k6hq1JSeyIt+lIV8T06m/B9W6PrT0IV/AV1f4Wnq6TU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KkYAQ91MX7sN4YejULGIAWqH4MzF4eq4EnoABT+4HVskADB/ckgxaHKCaY6YZO6Zn 9m3k+MJsSVKzhK3TERNPN1J9gik3CKnpsz1aKsyTVaEh7wOWMSnHIHdriRo2lXpvPG a96Uclr9ZQofuruIw+M15jxUVdk8JHfdAAtcb23M= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Josua Mayer , Jukka Rissanen , Michael Scott , Marcel Holtmann , Sasha Levin , linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.9 69/73] Bluetooth: 6lowpan: search for destination address in all peers Date: Mon, 15 Jul 2019 10:36:25 -0400 Message-Id: <20190715143629.10893-69-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190715143629.10893-1-sashal@kernel.org> References: <20190715143629.10893-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Josua Mayer [ Upstream commit b188b03270b7f8568fc714101ce82fbf5e811c5a ] Handle overlooked case where the target address is assigned to a peer and neither route nor gateway exist. For one peer, no checks are performed to see if it is meant to receive packets for a given address. As soon as there is a second peer however, checks are performed to deal with routes and gateways for handling complex setups with multiple hops to a target address. This logic assumed that no route and no gateway imply that the destination address can not be reached, which is false in case of a direct peer. Acked-by: Jukka Rissanen Tested-by: Michael Scott Signed-off-by: Josua Mayer Signed-off-by: Marcel Holtmann Signed-off-by: Sasha Levin --- net/bluetooth/6lowpan.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c index de7b82ece499..21096c882223 100644 --- a/net/bluetooth/6lowpan.c +++ b/net/bluetooth/6lowpan.c @@ -187,10 +187,16 @@ static inline struct lowpan_peer *peer_lookup_dst(struct lowpan_btle_dev *dev, } if (!rt) { - nexthop = &lowpan_cb(skb)->gw; - - if (ipv6_addr_any(nexthop)) - return NULL; + if (ipv6_addr_any(&lowpan_cb(skb)->gw)) { + /* There is neither route nor gateway, + * probably the destination is a direct peer. + */ + nexthop = daddr; + } else { + /* There is a known gateway + */ + nexthop = &lowpan_cb(skb)->gw; + } } else { nexthop = rt6_nexthop(rt, daddr); -- 2.20.1