[BlueZ,v2] mesh: Keep canceled SAR data for at least 10 sec

Commit Message

Isak Westin Oct. 11, 2022, 1:43 p.m. UTC

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(-)

Comments

[e-mail] Oct. 11, 2022, 2:38 p.m. UTC | #1

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Dear submitter,

Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=684508

---Test result---

Test Summary:
CheckPatch                    PASS      1.51 seconds
GitLint                       PASS      1.05 seconds
Prep - Setup ELL              PASS      27.23 seconds
Build - Prep                  PASS      0.84 seconds
Build - Configure             PASS      8.57 seconds
Build - Make                  PASS      858.05 seconds
Make Check                    PASS      12.44 seconds
Make Check w/Valgrind         PASS      292.22 seconds
Make Distcheck                PASS      236.01 seconds
Build w/ext ELL - Configure   PASS      8.85 seconds
Build w/ext ELL - Make        PASS      85.34 seconds
Incremental Build w/ patches  PASS      0.00 seconds
Scan Build                    PASS      512.73 seconds



---
Regards,
Linux Bluetooth

Patch

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;
 	}