From patchwork Tue Oct 11 14:06:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Isak Westin X-Patchwork-Id: 614606 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 A3531C433F5 for ; Tue, 11 Oct 2022 14:07:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230133AbiJKOHR (ORCPT ); Tue, 11 Oct 2022 10:07:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33198 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230141AbiJKOGl (ORCPT ); Tue, 11 Oct 2022 10:06:41 -0400 Received: from voyager.loytec.com (voyager.loytec.com [88.198.4.4]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3CF7597EED for ; Tue, 11 Oct 2022 07:06:29 -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 1oiFto-0002b5-4L for linux-bluetooth@vger.kernel.org; Tue, 11 Oct 2022 16:06:24 +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 29BE6L6R2091927; Tue, 11 Oct 2022 16:06:21 +0200 From: Isak Westin To: linux-bluetooth@vger.kernel.org Cc: Isak Westin Subject: [PATCH BlueZ v3] mesh: Keep cancelled SAR data for at least 10 sec Date: Tue, 11 Oct 2022 16:06:12 +0200 Message-Id: <20221011140612.2478-1-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 cancelled, 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..1d27289bf 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 cancelled */ + 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; }