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From:   Inga Stotland <inga.stotland@intel.com>
To:     linux-bluetooth@vger.kernel.org
Cc:     brian.gix@intel.com, Inga Stotland <inga.stotland@intel.com>
Subject: [PATCH BlueZ v2] mesh: Handle messages sent to a fixed group address
Date:   Fri,  6 Sep 2019 17:17:29 -0700
Message-Id: <20190907001729.15839-1-inga.stotland@intel.com>
MIME-Version: 1.0
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Sender: linux-bluetooth-owner@vger.kernel.org
Precedence: bulk

This handles the case when an inbound message is addressed to
a fixed group, i.e., all-proxies, all-frineds, all-relays and
all-nodes. The message is delivered to a primary element only,
and, with the exception of all-nodes case, if the corresponding
feature is enabled on the node.
---
 mesh/mesh-defs.h |  2 ++
 mesh/model.c     | 32 +++++++++++++++++++++++++++++++-
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/mesh/mesh-defs.h b/mesh/mesh-defs.h
index 1219e4939..885c30d3e 100644
--- a/mesh/mesh-defs.h
+++ b/mesh/mesh-defs.h
@@ -118,4 +118,6 @@
 #define IS_GROUP(x)		((((x) >= GROUP_ADDRESS_LOW) && \
 					((x) < FIXED_GROUP_HIGH)) || \
 					((x) == ALL_NODES_ADDRESS))
+
+#define IS_FIXED_GROUP_ADDRESS(x)	((x) == PROXIES_ADDRESS)
 #define IS_ALL_NODES(x)	((x) == ALL_NODES_ADDRESS)
diff --git a/mesh/model.c b/mesh/model.c
index 8f3d67ecf..8fe6378b3 100644
--- a/mesh/model.c
+++ b/mesh/model.c
@@ -311,7 +311,7 @@ static void forward_model(void *a, void *b)
 		return;
 
 	dst = fwd->dst;
-	if (dst == fwd->unicast || IS_ALL_NODES(dst))
+	if (dst == fwd->unicast || IS_FIXED_GROUP_ADDRESS(dst))
 		fwd->has_dst = true;
 	else if (fwd->virt) {
 		virt = l_queue_find(mod->virtuals, simple_match, fwd->virt);
@@ -886,8 +886,30 @@ bool mesh_model_rx(struct mesh_node *node, bool szmict, uint32_t seq0,
 	if (!num_ele || IS_UNASSIGNED(addr))
 		goto done;
 
+	/*
+	 * In case of fixed group  addresses check if the
+	 * corresponding mode is enabled.
+	 */
+	if (dst == PROXIES_ADDRESS &&
+			(node_proxy_mode_get(node) != MESH_MODE_ENABLED))
+		goto done;
+
+	if (dst == FRIENDS_ADDRESS &&
+			(node_friend_mode_get(node) != MESH_MODE_ENABLED))
+		goto done;
+
+	if (dst == RELAYS_ADDRESS) {
+		uint8_t cnt;
+		uint16_t interval;
+
+		if (node_relay_mode_get(node, &cnt, &interval) !=
+							MESH_MODE_ENABLED)
+			goto done;
+	}
+
 	is_subscription = !(IS_UNICAST(dst));
 
+
 	for (i = 0; i < num_ele; i++) {
 		struct l_queue *models;
 
@@ -927,6 +949,14 @@ bool mesh_model_rx(struct mesh_node *node, bool szmict, uint32_t seq0,
 		/* If the message was to unicast address, we are done */
 		if (!is_subscription && ele_idx == i)
 			break;
+
+		/*
+		 * For the fixed group addresses, i.e., all-proxies,
+		 * all-friends, all-relayes, all-nodes, the message is delivered
+		 * to a primary element only.
+		 */
+		if (IS_FIXED_GROUP_ADDRESS(dst))
+			break;
 	}
 
 done:
-- 
2.21.0