From 902389f3e7a33e5730d7e2318b1f1868170dc092 Mon Sep 17 00:00:00 2001
From: Isak Westin <isak.westin@loytec.com>
Date: Mon, 26 Sep 2022 15:01:09 +0200
Subject: mesh: Correct HB sub state updates

If heartbeat subscription is disabled, all fields should be set to zero
but collected data should be preserved. If HB subscription is enabled,
the collected data should be reset (which includes Min Hops = 0x7f).
HB subscription is disabled by setting any of the following fields to
zero: Source, destination or period log.
HB subscription is enabled by setting all the same fields to valid values.
---
 mesh/cfgmod-server.c |  2 +-
 mesh/net.c           | 20 ++++----------------
 2 files changed, 5 insertions(+), 17 deletions(-)

(limited to 'mesh')

diff --git a/mesh/cfgmod-server.c b/mesh/cfgmod-server.c
index 9c5edf551..55a2d896b 100644
--- a/mesh/cfgmod-server.c
+++ b/mesh/cfgmod-server.c
@@ -496,7 +496,7 @@ static uint16_t hb_subscription_get(struct mesh_node *node, int status)
 	n += 2;
 	msg[n++] = uint32_to_log(time_now.tv_sec);
 	msg[n++] = sub->count != 0xffff ? uint32_to_log(sub->count) : 0xff;
-	msg[n++] = sub->count ? sub->min_hops : 0;
+	msg[n++] = sub->min_hops;
 	msg[n++] = sub->max_hops;
 
 	return n;
diff --git a/mesh/net.c b/mesh/net.c
index 699469284..7fec98531 100644
--- a/mesh/net.c
+++ b/mesh/net.c
@@ -3608,24 +3608,14 @@ int mesh_net_set_heartbeat_sub(struct mesh_net *net, uint16_t src, uint16_t dst,
 		return MESH_STATUS_UNSPECIFIED_ERROR;
 
 	/* Check if the subscription should be disabled */
-	if (IS_UNASSIGNED(src) || IS_UNASSIGNED(dst)) {
+	if (IS_UNASSIGNED(src) || IS_UNASSIGNED(dst) || !period_log) {
 		if (IS_GROUP(sub->dst))
 			mesh_net_dst_unreg(net, sub->dst);
 
+		/* Preserve collected data, but disable */
 		sub->enabled = false;
 		sub->dst = UNASSIGNED_ADDRESS;
 		sub->src = UNASSIGNED_ADDRESS;
-		sub->count = 0;
-		sub->period = 0;
-		sub->min_hops = 0;
-		sub->max_hops = 0;
-
-	} else if (!period_log && src == sub->src && dst == sub->dst) {
-		if (IS_GROUP(sub->dst))
-			mesh_net_dst_unreg(net, sub->dst);
-
-		/* Preserve collected data, but disable */
-		sub->enabled = false;
 		sub->period = 0;
 
 	} else {
@@ -3637,12 +3627,12 @@ int mesh_net_set_heartbeat_sub(struct mesh_net *net, uint16_t src, uint16_t dst,
 				mesh_net_dst_reg(net, dst);
 		}
 
-		sub->enabled = !!period_log;
+		sub->enabled = true;
 		sub->src = src;
 		sub->dst = dst;
 		sub->count = 0;
 		sub->period = log_to_uint32(period_log);
-		sub->min_hops = 0x00;
+		sub->min_hops = 0x7f;
 		sub->max_hops = 0x00;
 		gettimeofday(&time_now, NULL);
 		sub->start = time_now.tv_sec;
@@ -3656,8 +3646,6 @@ int mesh_net_set_heartbeat_sub(struct mesh_net *net, uint16_t src, uint16_t dst,
 		return MESH_STATUS_SUCCESS;
 	}
 
-	sub->min_hops = 0xff;
-
 	if (!sub->timer)
 		sub->timer = l_timeout_create(sub->period, hb_sub_timeout_func,
 								net, NULL);
-- 
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