[PATCH BlueZ v2 3/3] mesh: Inform application about model subscriptions

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---
 doc/mesh-api.txt | 15 +++++++++
 mesh/model.c     | 87 +++++++++++++++++++++++++++++++++++++++++++++++-
 test/test-join   | 13 ++++++++
 test/test-mesh   | 25 ++++++++------
 4 files changed, 128 insertions(+), 12 deletions(-)

diff --git a/doc/mesh-api.txt b/doc/mesh-api.txt
index 23a958771..30b7452e2 100644
--- a/doc/mesh-api.txt
+++ b/doc/mesh-api.txt
@@ -100,6 +100,14 @@ Methods:
 					A 16-bit Company ID as defined by the
 					Bluetooth SIG
 
+				array{variant} Subscriptions
+
+					Addresses the model is subscribed to.
+
+					Each address is provided either as
+					uint16 for group addresses, or
+					as array{byte} for virtual labels.
+
 		PossibleErrors:
 			org.bluez.mesh.Error.InvalidArguments
 			org.bluez.mesh.Error.NotFound,
@@ -841,6 +849,13 @@ Methods:
 			A 16-bit Bluetooth-assigned Company Identifier of the
 			vendor as defined by Bluetooth SIG
 
+		array{variant} Subscriptions
+
+			Addresses the model is subscribed to.
+
+			Each address is provided either as uint16 for group
+			addresses, or as array{byte} for virtual labels.
+
 Properties:
 	uint8 Index [read-only]
 
diff --git a/mesh/model.c b/mesh/model.c
index a0c683691..b4e2c0600 100644
--- a/mesh/model.c
+++ b/mesh/model.c
@@ -295,6 +295,71 @@ static void config_update_model_bindings(struct mesh_node *node,
 	l_dbus_send(dbus, msg);
 }
 
+static void append_dict_subs_array(struct l_dbus_message_builder *builder,
+						struct l_queue *subs,
+						struct l_queue *virts,
+						const char *key)
+{
+	const struct l_queue_entry *entry;
+
+	l_dbus_message_builder_enter_dict(builder, "sv");
+	l_dbus_message_builder_append_basic(builder, 's', key);
+	l_dbus_message_builder_enter_variant(builder, "av");
+	l_dbus_message_builder_enter_array(builder, "v");
+
+	if (!subs)
+		goto virts;
+
+	for (entry = l_queue_get_entries(subs); entry; entry = entry->next) {
+		uint16_t grp = L_PTR_TO_UINT(entry->data);
+
+		l_dbus_message_builder_enter_variant(builder, "q");
+		l_dbus_message_builder_append_basic(builder,'q',
+									&grp);
+		l_dbus_message_builder_leave_variant(builder);
+	}
+
+virts:
+	if (!virts)
+		goto done;
+
+	for (entry = l_queue_get_entries(virts); entry; entry = entry->next) {
+		const struct mesh_virtual *virt = entry->data;
+
+		l_dbus_message_builder_enter_variant(builder, "ay");
+		dbus_append_byte_array(builder, virt->label,
+							sizeof(virt->label));
+		l_dbus_message_builder_leave_variant(builder);
+
+	}
+
+done:
+	l_dbus_message_builder_leave_array(builder);
+	l_dbus_message_builder_leave_variant(builder);
+	l_dbus_message_builder_leave_dict(builder);
+}
+
+static void config_update_model_subscriptions(struct mesh_node *node,
+							struct mesh_model *mod)
+{
+	struct l_dbus *dbus = dbus_get_bus();
+	struct l_dbus_message *msg;
+	struct l_dbus_message_builder *builder;
+
+	msg = create_config_update_msg(node, mod->ele_idx, mod->id,
+								&builder);
+	if (!msg)
+		return;
+
+	append_dict_subs_array(builder, mod->subs, mod->virtuals,
+							"Subscriptions");
+
+	l_dbus_message_builder_leave_array(builder);
+	l_dbus_message_builder_finalize(builder);
+	l_dbus_message_builder_destroy(builder);
+	l_dbus_send(dbus, msg);
+}
+
 static void forward_model(void *a, void *b)
 {
 	struct mesh_model *mod = a;
@@ -1381,6 +1446,10 @@ int mesh_model_sub_add(struct mesh_node *node, uint16_t addr, uint32_t id,
 	if (!mod)
 		return status;
 
+	if (!mod->cbs)
+		/* External models */
+		config_update_model_subscriptions(node, mod);
+
 	return add_sub(node_get_net(node), mod, group, b_virt, dst);
 }
 
@@ -1417,7 +1486,7 @@ int mesh_model_sub_ovr(struct mesh_node *node, uint16_t addr, uint32_t id,
 		}
 	}
 
-	status = mesh_model_sub_add(node, addr, id, group, b_virt, dst);
+	status = add_sub(node_get_net(node), mod, group, b_virt, dst);
 
 	if (status != MESH_STATUS_SUCCESS) {
 		/* Adding new group failed, so revert to old lists */
@@ -1440,6 +1509,10 @@ int mesh_model_sub_ovr(struct mesh_node *node, uint16_t addr, uint32_t id,
 		l_queue_destroy(virtuals, unref_virt);
 	}
 
+	if (!mod->cbs)
+		/* External models */
+		config_update_model_subscriptions(node, mod);
+
 	return status;
 }
 
@@ -1475,6 +1548,10 @@ int mesh_model_sub_del(struct mesh_node *node, uint16_t addr, uint32_t id,
 	if (l_queue_remove(mod->subs, L_UINT_TO_PTR(grp)))
 		mesh_net_dst_unreg(node_get_net(node), grp);
 
+	if (!mod->cbs)
+		/* External models */
+		config_update_model_subscriptions(node, mod);
+
 	return MESH_STATUS_SUCCESS;
 }
 
@@ -1497,6 +1574,10 @@ int mesh_model_sub_del_all(struct mesh_node *node, uint16_t addr, uint32_t id)
 	l_queue_clear(mod->subs, NULL);
 	l_queue_clear(mod->virtuals, unref_virt);
 
+	if (!mod->cbs)
+		/* External models */
+		config_update_model_subscriptions(node, mod);
+
 	return MESH_STATUS_SUCCESS;
 }
 
@@ -1691,6 +1772,10 @@ void model_build_config(void *model, void *msg_builder)
 								&period);
 	}
 
+	if (l_queue_length(mod->subs) || l_queue_length(mod->virtuals))
+		append_dict_subs_array(builder, mod->subs, mod->virtuals,
+							"Subscriptions");
+
 	l_dbus_message_builder_leave_array(builder);
 	l_dbus_message_builder_leave_struct(builder);
 }
diff --git a/test/test-join b/test/test-join
index fb7b0d640..6dfb2e8c3 100644
--- a/test/test-join
+++ b/test/test-join
@@ -327,6 +327,19 @@ class Model():
 			print('Model publication period ', end='')
 			print(self.pub_period, end='')
 			print(' ms')
+		if 'Subscriptions' in config:
+			self.print_subscriptions(config.get('Subscriptions'))
+
+	def print_subscriptions(self, subscriptions):
+		print('Model subscriptions ', end='')
+		for sub in subscriptions:
+			if isinstance(sub, int):
+				print('%04x' % sub, end=' ')
+
+			if isinstance(sub, list):
+				label = uuid.UUID(bytes=b''.join(sub))
+				print(label, end=' ')
+		print()
 
 class OnOffServer(Model):
 	def __init__(self, model_id):
diff --git a/test/test-mesh b/test/test-mesh
index c67bb65fb..5777fcebc 100755
--- a/test/test-mesh
+++ b/test/test-mesh
@@ -128,6 +128,7 @@ import dbus.exceptions
 
 from threading import Timer
 import time
+import uuid
 
 try:
   from gi.repository import GLib
@@ -628,17 +629,19 @@ class Model():
 			print('Model publication period ', end='')
 			print(self.pub_period, end='')
 			print(' ms')
-
-	def print_bindings(self):
-		print(set_cyan('Model'), set_cyan('%03x' % self.model_id),
-						set_cyan('is bound to: '))
-
-		if len(self.bindings) == 0:
-			print(set_cyan('** None **'))
-			return
-
-		for b in self.bindings:
-			print(set_green('%03x' % b) + ' ')
+		if 'Subscriptions' in config:
+			print('Model subscriptions ', end='')
+			self.print_subscriptions(config.get('Subscriptions'))
+			print()
+
+	def print_subscriptions(self, subscriptions):
+		for sub in subscriptions:
+			if isinstance(sub, int):
+				print('%04x' % sub, end=' ')
+
+			if isinstance(sub, list):
+				label = uuid.UUID(bytes=b''.join(sub))
+				print(label, end=' ')
 
 ########################
 # On Off Server Model
-- 
2.19.1




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