From patchwork Tue Oct 11 13:43:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Isak Westin X-Patchwork-Id: 614321 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2B3C0C433F5 for ; Tue, 11 Oct 2022 13:44:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229655AbiJKNoB (ORCPT ); Tue, 11 Oct 2022 09:44:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229547AbiJKNoA (ORCPT ); Tue, 11 Oct 2022 09:44:00 -0400 Received: from voyager.loytec.com (voyager.loytec.com [88.198.4.4]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 103C26BCFA for ; Tue, 11 Oct 2022 06:43:58 -0700 (PDT) Received: from 212-17-98-152.static.upcbusiness.at ([212.17.98.152] helo=lexx.office.loytec.com) by voyager.loytec.com with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oiFY3-0002Ik-4V for linux-bluetooth@vger.kernel.org; Tue, 11 Oct 2022 15:43:55 +0200 Received: from loytec-dev-vm.delta.corp ([10.101.25.21]) by lexx.office.loytec.com (8.15.2/8.15.2/Some OS 1.2.3-4.5) with ESMTP id 29BDhqLq2086133; Tue, 11 Oct 2022 15:43:52 +0200 From: Isak Westin To: linux-bluetooth@vger.kernel.org Cc: Isak Westin Subject: [PATCH BlueZ v2] mesh: Keep canceled SAR data for at least 10 sec Date: Tue, 11 Oct 2022 15:43:15 +0200 Message-Id: <20221011134315.1836-1-isak.westin@loytec.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 212.17.98.152 X-SA-Exim-Mail-From: isak.westin@loytec.com X-SA-Exim-Scanned: No (on voyager.loytec.com); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org When a SAR transmission has been completed or canceled, the recipent should store the block authentication values for at least 10 seconds and ignore new segments with the same values during this period. See MshPRFv1.0.1 section 3.5.3.4. --- mesh/net.c | 31 ++++++++++++++++++++++++++----- 1 file changed, 26 insertions(+), 5 deletions(-) diff --git a/mesh/net.c b/mesh/net.c index 3f42d962c..cbac0e02c 100644 --- a/mesh/net.c +++ b/mesh/net.c @@ -46,6 +46,7 @@ #define SEG_TO 2 #define MSG_TO 60 +#define SAR_DEL 10 #define DEFAULT_TRANSMIT_COUNT 1 #define DEFAULT_TRANSMIT_INTERVAL 100 @@ -166,6 +167,7 @@ struct mesh_sar { bool segmented; bool frnd; bool frnd_cred; + bool delete; uint8_t ttl; uint8_t last_seg; uint8_t key_aid; @@ -1492,14 +1494,27 @@ static void inseg_to(struct l_timeout *seg_timeout, void *user_data) static void inmsg_to(struct l_timeout *msg_timeout, void *user_data) { struct mesh_net *net = user_data; - struct mesh_sar *sar = l_queue_remove_if(net->sar_in, + struct mesh_sar *sar = l_queue_find(net->sar_in, match_msg_timeout, msg_timeout); - l_timeout_remove(msg_timeout); - if (!sar) + if (!sar) { + l_timeout_remove(msg_timeout); return; + } - sar->msg_timeout = NULL; + if (!sar->delete) { + /* + * Incomplete timer expired, cancel SAR and start + * delete timer + */ + l_timeout_remove(sar->seg_timeout); + sar->seg_timeout = NULL; + sar->delete = true; + l_timeout_modify(sar->msg_timeout, SAR_DEL); + return; + } + + l_queue_remove(net->sar_in, sar); mesh_sar_free(sar); } @@ -1963,7 +1978,9 @@ static bool seg_rxed(struct mesh_net *net, bool frnd, uint32_t iv_index, /* Re-Send ACK for full msg */ send_net_ack(net, sar_in, expected); return true; - } + } else if (sar_in->delete) + /* Ignore canceled */ + return false; } else { uint16_t len = MAX_SEG_TO_LEN(segN); @@ -2013,6 +2030,10 @@ static bool seg_rxed(struct mesh_net *net, bool frnd, uint32_t iv_index, /* Kill Inter-Seg timeout */ l_timeout_remove(sar_in->seg_timeout); sar_in->seg_timeout = NULL; + + /* Start delete timer */ + sar_in->delete = true; + l_timeout_modify(sar_in->msg_timeout, SAR_DEL); return true; }