[PATCH BlueZ v4 0/5] Use composition data to validate app against the node

[PATCH BlueZ v4 0/5] Use composition data to validate app against the node

[Michał Lowas-Rzechonek]

+ Fix setting app_path and owner during Attach()
+ Fix typo CompanyID property validation
+ Added comments about temporary node usage during Attach()
+ Keep element's Location property optional according to API
  documentation

---

This patchset streamlines app validation by creating a temporary node
during Attach, Join and CreateNetwork calls, then validating its
composition data to:
 - fit in Config Model Composition Data Get message
 - declare mandatory models on primary element
 - declare consecutive element indexes

During Attach call, temporary composition data is also compared with
data generated for existing node, guaranteeing immutablity required by
the specification.

Michał Lowas-Rzechonek (5):
  mesh: Convert void pointers to anonymous unions in managed_obj_request
  mesh: Validate application by comparing composition data
  mesh: Keep element and model lists sorted and unique
  mesh: Check that element indexes are consecutive
  mesh: Check that config server is present in primary element

 mesh/mesh-defs.h |   2 +
 mesh/node.c      | 558 ++++++++++++++++++++++++-----------------------
 2 files changed, 292 insertions(+), 268 deletions(-)

-- 
2.22.0

[PATCH BlueZ v4 1/5] mesh: Convert void pointers to anonymous unions in managed_obj_request

[Michał Lowas-Rzechonek]

---
 mesh/node.c | 75 +++++++++++++++++++++++++----------------------------
 1 file changed, 35 insertions(+), 40 deletions(-)

diff --git a/mesh/node.c b/mesh/node.c
index ceb46e4df..e51913edf 100644
--- a/mesh/node.c
+++ b/mesh/node.c
@@ -58,9 +58,11 @@
 #define DEFAULT_CRPL 10
 #define DEFAULT_SEQUENCE_NUMBER 0
 
-#define REQUEST_TYPE_JOIN 0
-#define REQUEST_TYPE_ATTACH 1
-#define REQUEST_TYPE_CREATE 2
+enum request_type {
+	REQUEST_TYPE_JOIN,
+	REQUEST_TYPE_ATTACH,
+	REQUEST_TYPE_CREATE,
+};
 
 struct node_element {
 	char *path;
@@ -110,10 +112,16 @@ struct mesh_node {
 };
 
 struct managed_obj_request {
-	void *data;
-	void *cb;
-	void *user_data;
-	uint8_t type;
+	union {
+		const uint8_t *uuid;
+		struct mesh_node *node;
+	};
+	union {
+		node_ready_func_t ready_cb;
+		node_join_ready_func_t join_ready_cb;
+	};
+	struct l_dbus_message *pending_msg;
+	enum request_type type;
 };
 
 static struct l_queue *nodes;
@@ -1571,7 +1579,7 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 		node = l_new(struct mesh_node, 1);
 		node->elements = l_queue_new();
 	} else {
-		node = req->data;
+		node = req->node;
 	}
 
 	num_ele = 0;
@@ -1642,8 +1650,6 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 	}
 
 	if (req->type == REQUEST_TYPE_ATTACH) {
-		node_ready_func_t cb = req->cb;
-
 		if (num_ele != node->num_ele)
 			goto fail;
 
@@ -1652,7 +1658,7 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 
 			node->disc_watch = l_dbus_add_disconnect_watch(bus,
 					node->owner, app_disc_cb, node, NULL);
-			cb(req->user_data, MESH_ERROR_NONE, node);
+			req->ready_cb(req->pending_msg, MESH_ERROR_NONE, node);
 		} else
 			goto fail;
 
@@ -1665,8 +1671,6 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 		init_storage_dir(node);
 
 	} else if (req->type == REQUEST_TYPE_JOIN) {
-		node_join_ready_func_t cb = req->cb;
-
 		if (!agent) {
 			l_error("Interface %s not found",
 						MESH_PROVISION_AGENT_INTERFACE);
@@ -1675,22 +1679,20 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 
 		node->num_ele = num_ele;
 		set_defaults(node);
-		memcpy(node->uuid, req->data, 16);
+		memcpy(node->uuid, req->uuid, 16);
 
 		if (!create_node_config(node, node->uuid))
 			goto fail;
 
-		cb(node, agent);
-
+		req->join_ready_cb(node, agent);
 	} else {
 		/* Callback for create node request */
-		node_ready_func_t cb = req->cb;
 		struct keyring_net_key net_key;
 		uint8_t dev_key[16];
 
 		node->num_ele = num_ele;
 		set_defaults(node);
-		memcpy(node->uuid, req->data, 16);
+		memcpy(node->uuid, req->uuid, 16);
 
 		if (!create_node_config(node, node->uuid))
 			goto fail;
@@ -1717,7 +1719,7 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 		if (!keyring_put_net_key(node, PRIMARY_NET_IDX, &net_key))
 			goto fail;
 
-		cb(req->user_data, MESH_ERROR_NONE, node);
+		req->ready_cb(req->pending_msg, MESH_ERROR_NONE, node);
 	}
 
 	return;
@@ -1726,26 +1728,19 @@ fail:
 		mesh_agent_remove(agent);
 
 	if (!is_new) {
-		/* Handle failed Attach request */
-		node_ready_func_t cb = req->cb;
-
 		free_node_dbus_resources(node);
 
-		cb(req->user_data, MESH_ERROR_FAILED, node);
+		req->ready_cb(req->pending_msg, MESH_ERROR_FAILED, node);
 	} else {
 		/* Handle failed Join and Create requests */
 		if (node)
 			node_remove(node);
 
-		if (req->type == REQUEST_TYPE_JOIN) {
-			node_join_ready_func_t cb = req->cb;
-
-			cb(NULL, NULL);
-		} else {
-			node_ready_func_t cb = req->cb;
-
-			cb(req->user_data, MESH_ERROR_FAILED, NULL);
-		}
+		if (req->type == REQUEST_TYPE_JOIN)
+			req->join_ready_cb(NULL, NULL);
+		else
+			req->ready_cb(req->pending_msg, MESH_ERROR_FAILED,
+									NULL);
 	}
 }
 
@@ -1770,9 +1765,9 @@ int node_attach(const char *app_path, const char *sender, uint64_t token,
 	node->owner = l_strdup(sender);
 
 	req = l_new(struct managed_obj_request, 1);
-	req->data = node;
-	req->cb = cb;
-	req->user_data = user_data;
+	req->node = node;
+	req->ready_cb = cb;
+	req->pending_msg = user_data;
 	req->type = REQUEST_TYPE_ATTACH;
 
 	l_dbus_method_call(dbus_get_bus(), sender, app_path,
@@ -1794,8 +1789,8 @@ void node_join(const char *app_path, const char *sender, const uint8_t *uuid,
 	l_debug("");
 
 	req = l_new(struct managed_obj_request, 1);
-	req->data = (void *) uuid;
-	req->cb = cb;
+	req->uuid = uuid;
+	req->join_ready_cb = cb;
 	req->type = REQUEST_TYPE_JOIN;
 
 	l_dbus_method_call(dbus_get_bus(), sender, app_path,
@@ -1813,9 +1808,9 @@ void node_create(const char *app_path, const char *sender, const uint8_t *uuid,
 	l_debug("");
 
 	req = l_new(struct managed_obj_request, 1);
-	req->data = (void *) uuid;
-	req->cb = cb;
-	req->user_data = user_data;
+	req->uuid = uuid;
+	req->ready_cb = cb;
+	req->pending_msg = user_data;
 	req->type = REQUEST_TYPE_CREATE;
 
 	l_dbus_method_call(dbus_get_bus(), sender, app_path,
-- 
2.22.0

[PATCH BlueZ v4 2/5] mesh: Validate application by comparing composition data

[Michał Lowas-Rzechonek]

Instead of validating application by enumerating D-Bus objects, create a
temporary node instance and check if composition data generated for the
temporary matches the node loaded from storage.

This allows node validation logic (primary element, mandatory models etc)
to be confined in node_generate_comp() function.

This also streamlines code implementing Attach(), Join() and
CreateNetwork() calls.
---
 mesh/mesh-defs.h |   2 +
 mesh/node.c      | 434 +++++++++++++++++++++--------------------------
 2 files changed, 197 insertions(+), 239 deletions(-)

diff --git a/mesh/mesh-defs.h b/mesh/mesh-defs.h
index 82be91d75..d14aa5af3 100644
--- a/mesh/mesh-defs.h
+++ b/mesh/mesh-defs.h
@@ -79,6 +79,8 @@
 #define MAX_MODEL_COUNT		0xff
 #define MAX_ELE_COUNT		0xff
 
+#define MAX_MSG_LEN 380
+
 #define IS_UNASSIGNED(x)	((x) == UNASSIGNED_ADDRESS)
 #define IS_UNICAST(x)		(((x) > UNASSIGNED_ADDRESS) && \
 					((x) < VIRTUAL_ADDRESS_LOW))
diff --git a/mesh/node.c b/mesh/node.c
index e51913edf..f824d6170 100644
--- a/mesh/node.c
+++ b/mesh/node.c
@@ -112,16 +112,16 @@ struct mesh_node {
 };
 
 struct managed_obj_request {
-	union {
-		const uint8_t *uuid;
-		struct mesh_node *node;
-	};
+	struct mesh_node *node;
 	union {
 		node_ready_func_t ready_cb;
 		node_join_ready_func_t join_ready_cb;
 	};
 	struct l_dbus_message *pending_msg;
 	enum request_type type;
+	union {
+		struct mesh_node *attach;
+	};
 };
 
 static struct l_queue *nodes;
@@ -160,14 +160,6 @@ static bool match_element_idx(const void *a, const void *b)
 	return (element->idx == index);
 }
 
-static bool match_model_id(const void *a, const void *b)
-{
-	const struct mesh_model *mod = a;
-	uint32_t mod_id = L_PTR_TO_UINT(b);
-
-	return mod_id == mesh_model_get_model_id(mod);
-}
-
 static bool match_element_path(const void *a, const void *b)
 {
 	const struct node_element *element = a;
@@ -212,11 +204,6 @@ static struct mesh_node *node_new(const uint8_t uuid[16])
 	node->net = mesh_net_new(node);
 	memcpy(node->uuid, uuid, sizeof(node->uuid));
 
-	if (!nodes)
-		nodes = l_queue_new();
-
-	l_queue_push_tail(nodes, node);
-
 	return node;
 }
 
@@ -412,6 +399,11 @@ static bool init_from_storage(struct mesh_config_node *db_node,
 
 	struct mesh_node *node = node_new(uuid);
 
+	if (!nodes)
+		nodes = l_queue_new();
+
+	l_queue_push_tail(nodes, node);
+
 	node->comp = l_new(struct node_composition, 1);
 	node->comp->cid = db_node->cid;
 	node->comp->pid = db_node->pid;
@@ -436,7 +428,7 @@ static bool init_from_storage(struct mesh_config_node *db_node,
 	memcpy(node->token, db_node->token, 8);
 
 	num_ele = l_queue_length(db_node->elements);
-	if (num_ele > 0xff)
+	if (num_ele > MAX_ELE_COUNT)
 		goto fail;
 
 	node->num_ele = num_ele;
@@ -1140,58 +1132,6 @@ static void app_disc_cb(struct l_dbus *bus, void *user_data)
 	free_node_dbus_resources(node);
 }
 
-static bool validate_model_property(struct node_element *ele,
-					struct l_dbus_message_iter *property,
-					uint8_t *num_models, bool vendor)
-{
-	struct l_dbus_message_iter ids;
-	uint16_t mod_id, vendor_id;
-	uint8_t count;
-	const char *signature = !vendor ? "aq" : "a(qq)";
-
-	if (!l_dbus_message_iter_get_variant(property, signature, &ids)) {
-		/* Allow empty elements */
-		if (l_queue_length(ele->models) == 0) {
-			*num_models = 0;
-			return true;
-		} else
-			return false;
-	}
-
-	count = 0;
-	if (!vendor) {
-		/* Bluetooth SIG defined models */
-		while (l_dbus_message_iter_next_entry(&ids, &mod_id)) {
-			struct mesh_model *mod;
-
-			/* Skip internally implemented models */
-			if ((VENDOR_ID_MASK | mod_id) == CONFIG_SRV_MODEL)
-				continue;
-
-			mod = l_queue_find(ele->models, match_model_id,
-					L_UINT_TO_PTR(VENDOR_ID_MASK | mod_id));
-			if (!mod)
-				return false;
-			count++;
-		}
-	} else {
-		/* Vendor defined models */
-		while (l_dbus_message_iter_next_entry(&ids, &vendor_id,
-								&mod_id)) {
-			struct mesh_model *mod;
-
-			mod = l_queue_find(ele->models, match_model_id,
-				L_UINT_TO_PTR((vendor_id << 16) | mod_id));
-			if (!mod)
-				return false;
-			count++;
-		}
-	}
-
-	*num_models = count;
-	return true;
-}
-
 static void get_models_from_properties(struct node_element *ele,
 					struct l_dbus_message_iter *property,
 								bool vendor)
@@ -1231,94 +1171,60 @@ static void get_models_from_properties(struct node_element *ele,
 }
 
 static bool get_element_properties(struct mesh_node *node, const char *path,
-					struct l_dbus_message_iter *properties,
-								bool is_new)
+					struct l_dbus_message_iter *properties)
 {
-	struct node_element *ele;
+	struct node_element *ele = l_new(struct node_element, 1);
 	const char *key;
 	struct l_dbus_message_iter var;
-	bool have_index = false;
-	uint8_t idx, mod_cnt, vendor_cnt;
+	bool idx = false;
+	bool mods = false;
+	bool vendor_mods = false;
 
 	l_debug("path %s", path);
 
+	ele->location = DEFAULT_LOCATION;
+
 	while (l_dbus_message_iter_next_entry(properties, &key, &var)) {
-		if (!strcmp(key, "Index")) {
-			if (!l_dbus_message_iter_get_variant(&var, "y", &idx))
-				return false;
-			have_index = true;
-			break;
+		if (!idx && !strcmp(key, "Index")) {
+			if (!l_dbus_message_iter_get_variant(&var, "y",
+								&ele->idx))
+				goto fail;
+			idx = true;
+			continue;
 		}
-	}
-
-	if (!have_index) {
-		l_debug("Mandatory property \"Index\" not found");
-		return false;
-	}
 
-	if (!is_new) {
-		/* Validate composition: check the element index */
-		ele = l_queue_find(node->elements, match_element_idx,
-							L_UINT_TO_PTR(idx));
-		if (!ele) {
-			l_debug("Element with index %u not found", idx);
-			return false;
+		if (!mods && !strcmp(key, "Models")) {
+			get_models_from_properties(ele, &var, false);
+			mods = true;
+			continue;
 		}
-	} else {
-		ele = l_new(struct node_element, 1);
-		ele->location = DEFAULT_LOCATION;
-		ele->idx = idx;
-	}
 
-	mod_cnt = 0;
-	vendor_cnt = 0;
+		if (!vendor_mods && !strcmp(key, "VendorModels")) {
+			get_models_from_properties(ele, &var, true);
+			vendor_mods = true;
+			continue;
+		}
 
-	while (l_dbus_message_iter_next_entry(properties, &key, &var)) {
 		if (!strcmp(key, "Location")) {
-			uint16_t loc;
-
-			l_dbus_message_iter_get_variant(&var, "q", &loc);
-
-			/* Validate composition: location match */
-			if (!is_new && (ele->location != loc))
-				return false;
-
-			ele->location = loc;
-
-		} else if (!strcmp(key, "Models")) {
-
-			if (is_new)
-				get_models_from_properties(ele, &var, false);
-			else if (!validate_model_property(ele, &var, &mod_cnt,
-									false))
-				return false;
-
-		} else if (!strcmp(key, "VendorModels")) {
-
-			if (is_new)
-				get_models_from_properties(ele, &var, true);
-			else if (!validate_model_property(ele, &var,
-							&vendor_cnt, true))
-				return false;
-
+			if (!l_dbus_message_iter_get_variant(&var, "q",
+							&ele->location))
+				goto fail;
+			continue;
 		}
 	}
 
-	if (is_new) {
-		l_queue_push_tail(node->elements, ele);
-	} else {
-		/* Account for internal Configuration Server model */
-		if (idx == 0)
-			mod_cnt += 1;
+	if (!idx || !mods || !vendor_mods)
+		goto fail;
 
-		/* Validate composition: number of models must match */
-		if (l_queue_length(ele->models) != (mod_cnt + vendor_cnt))
-			return false;
+	l_queue_push_tail(node->elements, ele);
 
-		ele->path = l_strdup(path);
-	}
+	ele->path = l_strdup(path);
 
 	return true;
+fail:
+	l_free(ele);
+
+	return false;
 }
 
 static void convert_node_to_storage(struct mesh_node *node,
@@ -1415,65 +1321,61 @@ static void set_defaults(struct mesh_node *node)
 }
 
 static bool get_app_properties(struct mesh_node *node, const char *path,
-					struct l_dbus_message_iter *properties,
-								bool is_new)
+					struct l_dbus_message_iter *properties)
 {
 	const char *key;
 	struct l_dbus_message_iter variant;
-	uint16_t value;
+	bool cid = false;
+	bool pid = false;
+	bool vid = false;
 
 	l_debug("path %s", path);
 
-	if (is_new) {
-		node->comp = l_new(struct node_composition, 1);
-		node->comp->crpl = DEFAULT_CRPL;
-	}
+	node->comp = l_new(struct node_composition, 1);
+	node->comp->crpl = DEFAULT_CRPL;
 
 	while (l_dbus_message_iter_next_entry(properties, &key, &variant)) {
-
-		if (!strcmp(key, "CompanyID")) {
+		if (!cid && !strcmp(key, "CompanyID")) {
 			if (!l_dbus_message_iter_get_variant(&variant, "q",
-									&value))
-				return false;
-
-			if (!is_new && node->comp->cid != value)
-				return false;
-
-			node->comp->cid = value;
+							&node->comp->cid))
+				goto fail;
+			cid = true;
+			continue;
+		}
 
-		} else if (!strcmp(key, "ProductID")) {
+		if (!pid && !strcmp(key, "ProductID")) {
 			if (!l_dbus_message_iter_get_variant(&variant, "q",
-									&value))
-				return false;
-
-			if (!is_new && node->comp->pid != value)
-				return false;
-
-			node->comp->pid = value;
+							&node->comp->pid))
+				goto fail;
+			pid = true;
+			continue;
+		}
 
-		} else if (!strcmp(key, "VersionID")) {
+		if (!vid && !strcmp(key, "VersionID")) {
 			if (!l_dbus_message_iter_get_variant(&variant, "q",
-									&value))
-				return false;
-
-			if (!is_new && node->comp->vid != value)
+							&node->comp->vid))
 				return false;
+			vid = true;
+			continue;
+		}
 
-			node->comp->vid = value;
-
-		} else if (!strcmp(key, "CRPL")) {
+		if (!strcmp(key, "CRPL")) {
 			if (!l_dbus_message_iter_get_variant(&variant, "q",
-									&value))
-				return false;
-
-			if (!is_new && node->comp->crpl != value)
-				return false;
-
-			node->comp->crpl = value;
+							&node->comp->crpl))
+				goto fail;
+			continue;
 		}
 	}
 
+	if (!cid || !pid || !vid)
+		goto fail;
+
 	return true;
+fail:
+	l_free(node->comp);
+	node->comp = NULL;
+
+	return false;
 }
 
 static bool add_local_node(struct mesh_node *node, uint16_t unicast, bool kr,
@@ -1552,18 +1454,83 @@ static bool init_storage_dir(struct mesh_node *node)
 	return true;
 }
 
+static bool check_req_node(struct managed_obj_request *req)
+{
+	uint8_t node_comp[MAX_MSG_LEN - 2];
+	uint8_t attach_comp[MAX_MSG_LEN - 2];
+
+	uint16_t node_len = node_generate_comp(req->node, node_comp,
+							sizeof(node_comp));
+
+	if (!node_len)
+		return false;
+
+	if (req->type == REQUEST_TYPE_ATTACH) {
+		uint16_t attach_len = node_generate_comp(req->attach,
+					attach_comp, sizeof(attach_comp));
+
+		if (node_len != attach_len ||
+				memcmp(node_comp, attach_comp, node_len)) {
+			l_debug("Failed to verify app's composition data");
+			return false;
+		}
+	}
+
+	return true;
+}
+
+static struct mesh_node *attach_req_node(struct mesh_node *attach,
+							struct mesh_node *node)
+{
+	const struct l_queue_entry *attach_entry;
+	const struct l_queue_entry *node_entry;
+
+	attach_entry = l_queue_get_entries(attach->elements);
+	node_entry = l_queue_get_entries(node->elements);
+
+	/*
+	 * Update existing node with paths collected in temporary node,
+	 * then remove the temporary.
+	 * */
+	while (attach_entry && node_entry)
+	{
+		struct node_element *attach_ele = node_entry->data;
+		struct node_element *node_ele = node_entry->data;
+
+		l_free(attach_ele->path);
+		attach_ele->path = node_ele->path;
+		node_ele->path = NULL;
+
+		attach_entry = attach_entry->next;
+		node_entry = node_entry->next;
+	}
+
+	mesh_agent_remove(attach->agent);
+	attach->agent = node->agent;
+	node->agent = NULL;
+
+	attach->provisioner = node->provisioner;
+
+	attach->app_path = node->app_path;
+	node->app_path = NULL;
+
+	attach->owner = node->owner;
+	node->owner = NULL;
+
+	node_remove(node);
+
+	return attach;
+}
+
 static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 {
 	struct l_dbus_message_iter objects, interfaces;
 	struct managed_obj_request *req = user_data;
 	const char *path;
-	struct mesh_node *node = NULL;
+	struct mesh_node *node = req->node;
 	void *agent = NULL;
 	bool have_app = false;
-	bool is_new;
-	uint8_t num_ele;
-
-	is_new = (req->type != REQUEST_TYPE_ATTACH);
+	unsigned int num_ele;
 
 	if (l_dbus_message_is_error(msg)) {
 		l_error("Failed to get app's dbus objects");
@@ -1575,14 +1542,8 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 		goto fail;
 	}
 
-	if (is_new) {
-		node = l_new(struct mesh_node, 1);
+	if (!node->elements)
 		node->elements = l_queue_new();
-	} else {
-		node = req->node;
-	}
-
-	num_ele = 0;
 
 	while (l_dbus_message_iter_next_entry(&objects, &path, &interfaces)) {
 		struct l_dbus_message_iter properties;
@@ -1593,21 +1554,14 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 			bool res;
 
 			if (!strcmp(MESH_ELEMENT_INTERFACE, interface)) {
-
-				if (num_ele == MAX_ELE_COUNT)
-					goto fail;
-
 				res = get_element_properties(node, path,
-							&properties, is_new);
+								&properties);
 				if (!res)
 					goto fail;
-
-				num_ele++;
-
 			} else if (!strcmp(MESH_APPLICATION_INTERFACE,
 								interface)) {
 				res = get_app_properties(node, path,
-							&properties, is_new);
+								&properties);
 				if (!res)
 					goto fail;
 
@@ -1637,7 +1591,7 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 		goto fail;
 	}
 
-	if (num_ele == 0) {
+	if (l_queue_isempty(node->elements)) {
 		l_error("Interface %s not found", MESH_ELEMENT_INTERFACE);
 		goto fail;
 	}
@@ -1649,17 +1603,23 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 		goto fail;
 	}
 
+	set_defaults(node);
+	num_ele = l_queue_length(node->elements);
+
+	if (num_ele > MAX_ELE_COUNT)
+		goto fail;
+
+	node->num_ele = num_ele;
+
+	if (!check_req_node(req))
+		goto fail;
+
 	if (req->type == REQUEST_TYPE_ATTACH) {
-		if (num_ele != node->num_ele)
-			goto fail;
+		struct l_dbus *bus = dbus_get_bus();
 
-		if (register_node_object(node)) {
-			struct l_dbus *bus = dbus_get_bus();
+		node = attach_req_node(req->attach, node);
 
-			node->disc_watch = l_dbus_add_disconnect_watch(bus,
-					node->owner, app_disc_cb, node, NULL);
-			req->ready_cb(req->pending_msg, MESH_ERROR_NONE, node);
-		} else
+		if (!register_node_object(node))
 			goto fail;
 
 		/*
@@ -1670,30 +1630,24 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 		 */
 		init_storage_dir(node);
 
+		node->disc_watch = l_dbus_add_disconnect_watch(bus,
+				node->owner, app_disc_cb, node, NULL);
+
 	} else if (req->type == REQUEST_TYPE_JOIN) {
-		if (!agent) {
+		if (!node->agent) {
 			l_error("Interface %s not found",
 						MESH_PROVISION_AGENT_INTERFACE);
 			goto fail;
 		}
 
-		node->num_ele = num_ele;
-		set_defaults(node);
-		memcpy(node->uuid, req->uuid, 16);
-
 		if (!create_node_config(node, node->uuid))
 			goto fail;
 
-		req->join_ready_cb(node, agent);
 	} else {
 		/* Callback for create node request */
 		struct keyring_net_key net_key;
 		uint8_t dev_key[16];
 
-		node->num_ele = num_ele;
-		set_defaults(node);
-		memcpy(node->uuid, req->uuid, 16);
-
 		if (!create_node_config(node, node->uuid))
 			goto fail;
 
@@ -1713,35 +1667,32 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 		init_storage_dir(node);
 
 		if (!keyring_put_remote_dev_key(node, DEFAULT_NEW_UNICAST,
-							num_ele, dev_key))
+						node->num_ele, dev_key))
 			goto fail;
 
 		if (!keyring_put_net_key(node, PRIMARY_NET_IDX, &net_key))
 			goto fail;
 
-		req->ready_cb(req->pending_msg, MESH_ERROR_NONE, node);
 	}
 
+	if (req->type == REQUEST_TYPE_JOIN)
+		req->join_ready_cb(node, node->agent);
+	else
+		req->ready_cb(req->pending_msg, MESH_ERROR_NONE, node);
+
 	return;
 fail:
 	if (agent)
 		mesh_agent_remove(agent);
 
-	if (!is_new) {
-		free_node_dbus_resources(node);
+	/* Handle failed requests */
+	if (node)
+		node_remove(node);
 
-		req->ready_cb(req->pending_msg, MESH_ERROR_FAILED, node);
-	} else {
-		/* Handle failed Join and Create requests */
-		if (node)
-			node_remove(node);
-
-		if (req->type == REQUEST_TYPE_JOIN)
-			req->join_ready_cb(NULL, NULL);
-		else
-			req->ready_cb(req->pending_msg, MESH_ERROR_FAILED,
-									NULL);
-	}
+	if (req->type == REQUEST_TYPE_JOIN)
+		req->join_ready_cb(NULL, NULL);
+	else
+		req->ready_cb(req->pending_msg, MESH_ERROR_FAILED, NULL);
 }
 
 /* Establish relationship between application and mesh node */
@@ -1761,13 +1712,18 @@ int node_attach(const char *app_path, const char *sender, uint64_t token,
 		return MESH_ERROR_ALREADY_EXISTS;
 	}
 
-	node->app_path = l_strdup(app_path);
-	node->owner = l_strdup(sender);
-
 	req = l_new(struct managed_obj_request, 1);
-	req->node = node;
+
+	/*
+	 * Create a temporary node to collect composition data from attaching
+	 * application. Existing node is passed in req->attach.
+	 */
+	req->node = node_new(node->uuid);
+	req->node->app_path = l_strdup(app_path);
+	req->node->owner = l_strdup(sender);
 	req->ready_cb = cb;
 	req->pending_msg = user_data;
+	req->attach = node;
 	req->type = REQUEST_TYPE_ATTACH;
 
 	l_dbus_method_call(dbus_get_bus(), sender, app_path,
@@ -1789,7 +1745,7 @@ void node_join(const char *app_path, const char *sender, const uint8_t *uuid,
 	l_debug("");
 
 	req = l_new(struct managed_obj_request, 1);
-	req->uuid = uuid;
+	req->node = node_new(uuid);
 	req->join_ready_cb = cb;
 	req->type = REQUEST_TYPE_JOIN;
 
@@ -1808,7 +1764,7 @@ void node_create(const char *app_path, const char *sender, const uint8_t *uuid,
 	l_debug("");
 
 	req = l_new(struct managed_obj_request, 1);
-	req->uuid = uuid;
+	req->node = node_new(uuid);
 	req->ready_cb = cb;
 	req->pending_msg = user_data;
 	req->type = REQUEST_TYPE_CREATE;
-- 
2.22.0

[PATCH BlueZ v4 3/5] mesh: Keep element and model lists sorted and unique

[Michał Lowas-Rzechonek]

This keeps composition data unchanged even if elements or models are
registered in a different order.
---
 mesh/node.c | 80 ++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 67 insertions(+), 13 deletions(-)

diff --git a/mesh/node.c b/mesh/node.c
index f824d6170..68cce7baf 100644
--- a/mesh/node.c
+++ b/mesh/node.c
@@ -160,6 +160,20 @@ static bool match_element_idx(const void *a, const void *b)
 	return (element->idx == index);
 }
 
+static int compare_element_idx(const void *a, const void *b, void *user_data)
+{
+	uint32_t a_idx = ((const struct node_element *)a)->idx;
+	uint32_t b_idx = ((const struct node_element *)b)->idx;
+
+	if (a_idx < b_idx)
+		return -1;
+
+	if (a_idx > b_idx)
+		return 1;
+
+	return 0;
+}
+
 static bool match_element_path(const void *a, const void *b)
 {
 	const struct node_element *element = a;
@@ -171,6 +185,29 @@ static bool match_element_path(const void *a, const void *b)
 	return (!strcmp(element->path, path));
 }
 
+static bool match_model_id(const void *a, const void *b)
+{
+	const struct mesh_model *mod = a;
+	uint32_t mod_id = L_PTR_TO_UINT(b);
+
+	return mesh_model_get_model_id(mod) == mod_id;
+}
+
+static int compare_model_id(const void *a, const void *b, void *user_data)
+{
+	uint32_t a_id = mesh_model_get_model_id(a);
+	uint32_t b_id = mesh_model_get_model_id(b);
+
+	if (a_id < b_id)
+		return -1;
+
+	if (a_id > b_id)
+		return 1;
+
+	return 0;
+}
+
+
 struct mesh_node *node_find_by_addr(uint16_t addr)
 {
 	if (!IS_UNICAST(addr))
@@ -287,6 +324,17 @@ void node_remove(struct mesh_node *node)
 	free_node_resources(node);
 }
 
+static bool element_add_model(struct node_element *ele, struct mesh_model *mod)
+{
+	uint32_t mod_id = mesh_model_get_model_id(mod);
+
+	if (l_queue_find(ele->models, match_model_id, L_UINT_TO_PTR(mod_id)))
+		return false;
+
+	l_queue_insert(ele->models, mod, compare_model_id, NULL);
+	return true;
+}
+
 static bool add_models(struct mesh_node *node, struct node_element *ele,
 					struct mesh_config_element *db_ele)
 {
@@ -305,7 +353,10 @@ static bool add_models(struct mesh_node *node, struct node_element *ele,
 		if (!mod)
 			return false;
 
-		l_queue_push_tail(ele->models, mod);
+		if (!element_add_model(ele, mod)) {
+			mesh_model_free(mod);
+			return false;
+		}
 	}
 
 	return true;
@@ -334,7 +385,8 @@ static void add_internal_model(struct mesh_node *node, uint32_t mod_id,
 	if (!ele->models)
 		ele->models = l_queue_new();
 
-	l_queue_push_tail(ele->models, mod);
+	if (!element_add_model(ele, mod))
+		mesh_model_free(mod);
 }
 
 static bool add_element(struct mesh_node *node,
@@ -1026,12 +1078,12 @@ bool node_parse_composition(struct mesh_node *node, uint8_t *data,
 		while (len >= 2 && m--) {
 			mod_id = l_get_le16(data);
 			mod = mesh_model_new(ele->idx, mod_id);
-			if (!mod) {
+			if (!mod || !element_add_model(ele, mod)) {
+				mesh_model_free(mod);
 				element_free(ele);
 				goto fail;
 			}
 
-			l_queue_push_tail(ele->models, mod);
 			data += 2;
 			len -= 2;
 		}
@@ -1048,12 +1100,12 @@ bool node_parse_composition(struct mesh_node *node, uint8_t *data,
 			mod_id |= (vendor_id << 16);
 			mod = mesh_model_vendor_new(ele->idx, vendor_id,
 									mod_id);
-			if (!mod) {
+			if (!mod || !element_add_model(ele, mod)) {
+				mesh_model_free(mod);
 				element_free(ele);
 				goto fail;
 			}
 
-			l_queue_push_tail(ele->models, mod);
 			data += 4;
 			len -= 4;
 		}
@@ -1151,12 +1203,9 @@ static void get_models_from_properties(struct node_element *ele,
 		while (l_dbus_message_iter_next_entry(&ids, &mod_id)) {
 			struct mesh_model *mod;
 
-			/* Skip internally implemented models */
-			if ((VENDOR_ID_MASK | mod_id) == CONFIG_SRV_MODEL)
-				continue;
-
 			mod = mesh_model_new(ele->idx, mod_id);
-			l_queue_push_tail(ele->models, mod);
+			if (!element_add_model(ele, mod))
+				mesh_model_free(mod);
 		}
 		return;
 	}
@@ -1166,7 +1215,8 @@ static void get_models_from_properties(struct node_element *ele,
 		struct mesh_model *mod;
 
 		mod = mesh_model_vendor_new(ele->idx, vendor_id, mod_id);
-		l_queue_push_tail(ele->models, mod);
+		if (!element_add_model(ele, mod))
+			mesh_model_free(mod);
 	}
 }
 
@@ -1216,7 +1266,11 @@ static bool get_element_properties(struct mesh_node *node, const char *path,
 	if (!idx || !mods || !vendor_mods)
 		goto fail;
 
-	l_queue_push_tail(node->elements, ele);
+	if (l_queue_find(node->elements, match_element_idx,
+						L_UINT_TO_PTR(ele->idx)))
+		goto fail;
+
+	l_queue_insert(node->elements, ele, compare_element_idx, NULL);
 
 	ele->path = l_strdup(path);
 
-- 
2.22.0

[PATCH BlueZ v4 4/5] mesh: Check that element indexes are consecutive

[Michał Lowas-Rzechonek]

---
 mesh/node.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/mesh/node.c b/mesh/node.c
index 68cce7baf..1709a25ba 100644
--- a/mesh/node.c
+++ b/mesh/node.c
@@ -898,6 +898,7 @@ uint8_t node_friend_mode_get(struct mesh_node *node)
 uint16_t node_generate_comp(struct mesh_node *node, uint8_t *buf, uint16_t sz)
 {
 	uint16_t n, features;
+	uint16_t num_ele = 0;
 	const struct l_queue_entry *ele_entry;
 
 	if (!node || !node->comp || sz < MIN_COMP_SIZE)
@@ -935,6 +936,11 @@ uint16_t node_generate_comp(struct mesh_node *node, uint8_t *buf, uint16_t sz)
 		uint8_t num_s = 0, num_v = 0;
 		uint8_t *mod_buf;
 
+		if (ele->idx != num_ele)
+			return 0;
+
+		num_ele++;
+
 		/* At least fit location and zeros for number of models */
 		if ((n + 4) > sz)
 			return n;
@@ -997,6 +1003,9 @@ element_done:
 
 	}
 
+	if (!num_ele)
+		return 0;
+
 	return n;
 }
 
-- 
2.22.0

[PATCH BlueZ v4 5/5] mesh: Check that config server is present in primary element

[Michał Lowas-Rzechonek]

This verifies that Config Server model is supported by element #0, and
is not supported by any other element.
---
 mesh/node.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/mesh/node.c b/mesh/node.c
index 1709a25ba..0b02089bf 100644
--- a/mesh/node.c
+++ b/mesh/node.c
@@ -899,6 +899,8 @@ uint16_t node_generate_comp(struct mesh_node *node, uint8_t *buf, uint16_t sz)
 {
 	uint16_t n, features;
 	uint16_t num_ele = 0;
+	uint8_t *cfgmod_idx = NULL;
+
 	const struct l_queue_entry *ele_entry;
 
 	if (!node || !node->comp || sz < MIN_COMP_SIZE)
@@ -961,6 +963,9 @@ uint16_t node_generate_comp(struct mesh_node *node, uint8_t *buf, uint16_t sz)
 			mod_id = mesh_model_get_model_id(
 					(const struct mesh_model *) mod);
 
+			if (mod_id == CONFIG_SRV_MODEL)
+				cfgmod_idx = &ele->idx;
+
 			if ((mod_id & VENDOR_ID_MASK) == VENDOR_ID_MASK) {
 				if (n + 2 > sz)
 					goto element_done;
@@ -1006,6 +1011,9 @@ element_done:
 	if (!num_ele)
 		return 0;
 
+	if (!cfgmod_idx || *cfgmod_idx != PRIMARY_ELE_IDX)
+		return 0;
+
 	return n;
 }
 
-- 
2.22.0

Re: [PATCH BlueZ v4 2/5] mesh: Validate application by comparing composition data

[Stotland, Inga]

[-- Attachment #1: Type: text/plain, Size: 20173 bytes --]

Hi Michal,

On Thu, 2019-07-25 at 21:49 +0200, Michał Lowas-Rzechonek wrote:
> Instead of validating application by enumerating D-Bus objects,
> create a
> temporary node instance and check if composition data generated for
> the
> temporary matches the node loaded from storage.
> 
> This allows node validation logic (primary element, mandatory models
> etc)
> to be confined in node_generate_comp() function.
> 
> This also streamlines code implementing Attach(), Join() and
> CreateNetwork() calls.
> ---
>  mesh/mesh-defs.h |   2 +
>  mesh/node.c      | 434 +++++++++++++++++++++----------------------
> ----
>  2 files changed, 197 insertions(+), 239 deletions(-)
> 
> diff --git a/mesh/mesh-defs.h b/mesh/mesh-defs.h
> index 82be91d75..d14aa5af3 100644
> --- a/mesh/mesh-defs.h
> +++ b/mesh/mesh-defs.h
> @@ -79,6 +79,8 @@
>  #define MAX_MODEL_COUNT		0xff
>  #define MAX_ELE_COUNT		0xff
>  
> +#define MAX_MSG_LEN 380
> +
>  #define IS_UNASSIGNED(x)	((x) == UNASSIGNED_ADDRESS)
>  #define IS_UNICAST(x)		(((x) > UNASSIGNED_ADDRESS) &&
> \
>  					((x) < VIRTUAL_ADDRESS_LOW))
> diff --git a/mesh/node.c b/mesh/node.c
> index e51913edf..f824d6170 100644
> --- a/mesh/node.c
> +++ b/mesh/node.c
> @@ -112,16 +112,16 @@ struct mesh_node {
>  };
>  
>  struct managed_obj_request {
> -	union {
> -		const uint8_t *uuid;
> -		struct mesh_node *node;
> -	};
> +	struct mesh_node *node;
>  	union {
>  		node_ready_func_t ready_cb;
>  		node_join_ready_func_t join_ready_cb;
>  	};
>  	struct l_dbus_message *pending_msg;
>  	enum request_type type;
> +	union {
> +		struct mesh_node *attach;
> +	};
>  };
>  
>  static struct l_queue *nodes;
> @@ -160,14 +160,6 @@ static bool match_element_idx(const void *a,
> const void *b)
>  	return (element->idx == index);
>  }
>  
> -static bool match_model_id(const void *a, const void *b)
> -{
> -	const struct mesh_model *mod = a;
> -	uint32_t mod_id = L_PTR_TO_UINT(b);
> -
> -	return mod_id == mesh_model_get_model_id(mod);
> -}
> -
>  static bool match_element_path(const void *a, const void *b)
>  {
>  	const struct node_element *element = a;
> @@ -212,11 +204,6 @@ static struct mesh_node *node_new(const uint8_t
> uuid[16])
>  	node->net = mesh_net_new(node);
>  	memcpy(node->uuid, uuid, sizeof(node->uuid));
>  
> -	if (!nodes)
> -		nodes = l_queue_new();
> -
> -	l_queue_push_tail(nodes, node);
> -
>  	return node;
>  }
>  
> @@ -412,6 +399,11 @@ static bool init_from_storage(struct
> mesh_config_node *db_node,
>  
>  	struct mesh_node *node = node_new(uuid);
>  
> +	if (!nodes)
> +		nodes = l_queue_new();
> +
> +	l_queue_push_tail(nodes, node);
> +
>  	node->comp = l_new(struct node_composition, 1);
>  	node->comp->cid = db_node->cid;
>  	node->comp->pid = db_node->pid;
> @@ -436,7 +428,7 @@ static bool init_from_storage(struct
> mesh_config_node *db_node,
>  	memcpy(node->token, db_node->token, 8);
>  
>  	num_ele = l_queue_length(db_node->elements);
> -	if (num_ele > 0xff)
> +	if (num_ele > MAX_ELE_COUNT)
>  		goto fail;
>  
>  	node->num_ele = num_ele;
> @@ -1140,58 +1132,6 @@ static void app_disc_cb(struct l_dbus *bus,
> void *user_data)
>  	free_node_dbus_resources(node);
>  }
>  
> -static bool validate_model_property(struct node_element *ele,
> -					struct l_dbus_message_iter
> *property,
> -					uint8_t *num_models, bool
> vendor)
> -{
> -	struct l_dbus_message_iter ids;
> -	uint16_t mod_id, vendor_id;
> -	uint8_t count;
> -	const char *signature = !vendor ? "aq" : "a(qq)";
> -
> -	if (!l_dbus_message_iter_get_variant(property, signature,
> &ids)) {
> -		/* Allow empty elements */
> -		if (l_queue_length(ele->models) == 0) {
> -			*num_models = 0;
> -			return true;
> -		} else
> -			return false;
> -	}
> -
> -	count = 0;
> -	if (!vendor) {
> -		/* Bluetooth SIG defined models */
> -		while (l_dbus_message_iter_next_entry(&ids, &mod_id)) {
> -			struct mesh_model *mod;
> -
> -			/* Skip internally implemented models */
> -			if ((VENDOR_ID_MASK | mod_id) ==
> CONFIG_SRV_MODEL)
> -				continue;
> -
> -			mod = l_queue_find(ele->models, match_model_id,
> -					L_UINT_TO_PTR(VENDOR_ID_MASK |
> mod_id));
> -			if (!mod)
> -				return false;
> -			count++;
> -		}
> -	} else {
> -		/* Vendor defined models */
> -		while (l_dbus_message_iter_next_entry(&ids, &vendor_id,
> -								&mod_id
> )) {
> -			struct mesh_model *mod;
> -
> -			mod = l_queue_find(ele->models, match_model_id,
> -				L_UINT_TO_PTR((vendor_id << 16) |
> mod_id));
> -			if (!mod)
> -				return false;
> -			count++;
> -		}
> -	}
> -
> -	*num_models = count;
> -	return true;
> -}
> -
>  static void get_models_from_properties(struct node_element *ele,
>  					struct l_dbus_message_iter
> *property,
>  								bool
> vendor)
> @@ -1231,94 +1171,60 @@ static void get_models_from_properties(struct
> node_element *ele,
>  }
>  
>  static bool get_element_properties(struct mesh_node *node, const
> char *path,
> -					struct l_dbus_message_iter
> *properties,
> -								bool
> is_new)
> +					struct l_dbus_message_iter
> *properties)
>  {
> -	struct node_element *ele;
> +	struct node_element *ele = l_new(struct node_element, 1);
>  	const char *key;
>  	struct l_dbus_message_iter var;
> -	bool have_index = false;
> -	uint8_t idx, mod_cnt, vendor_cnt;
> +	bool idx = false;
> +	bool mods = false;
> +	bool vendor_mods = false;
>  
>  	l_debug("path %s", path);
>  
> +	ele->location = DEFAULT_LOCATION;
> +
>  	while (l_dbus_message_iter_next_entry(properties, &key, &var))
> {
> -		if (!strcmp(key, "Index")) {
> -			if (!l_dbus_message_iter_get_variant(&var, "y",
> &idx))
> -				return false;
> -			have_index = true;
> -			break;
> +		if (!idx && !strcmp(key, "Index")) {
> +			if (!l_dbus_message_iter_get_variant(&var, "y",
> +								&ele-
> >idx))
> +				goto fail;
> +			idx = true;
> +			continue;
>  		}
> -	}
> -
> -	if (!have_index) {
> -		l_debug("Mandatory property \"Index\" not found");
> -		return false;
> -	}
>  
> -	if (!is_new) {
> -		/* Validate composition: check the element index */
> -		ele = l_queue_find(node->elements, match_element_idx,
> -							L_UINT_TO_PTR(i
> dx));
> -		if (!ele) {
> -			l_debug("Element with index %u not found",
> idx);
> -			return false;
> +		if (!mods && !strcmp(key, "Models")) {
> +			get_models_from_properties(ele, &var, false);
> +			mods = true;
> +			continue;
>  		}
> -	} else {
> -		ele = l_new(struct node_element, 1);
> -		ele->location = DEFAULT_LOCATION;
> -		ele->idx = idx;
> -	}
>  
> -	mod_cnt = 0;
> -	vendor_cnt = 0;
> +		if (!vendor_mods && !strcmp(key, "VendorModels")) {
> +			get_models_from_properties(ele, &var, true);
> +			vendor_mods = true;
> +			continue;
> +		}
>  
> -	while (l_dbus_message_iter_next_entry(properties, &key, &var))
> {
>  		if (!strcmp(key, "Location")) {
> -			uint16_t loc;
> -
> -			l_dbus_message_iter_get_variant(&var, "q",
> &loc);
> -
> -			/* Validate composition: location match */
> -			if (!is_new && (ele->location != loc))
> -				return false;
> -
> -			ele->location = loc;
> -
> -		} else if (!strcmp(key, "Models")) {
> -
> -			if (is_new)
> -				get_models_from_properties(ele, &var,
> false);
> -			else if (!validate_model_property(ele, &var,
> &mod_cnt,
> -									
> false))
> -				return false;
> -
> -		} else if (!strcmp(key, "VendorModels")) {
> -
> -			if (is_new)
> -				get_models_from_properties(ele, &var,
> true);
> -			else if (!validate_model_property(ele, &var,
> -							&vendor_cnt,
> true))
> -				return false;
> -
> +			if (!l_dbus_message_iter_get_variant(&var, "q",
> +							&ele-
> >location))
> +				goto fail;
> +			continue;
>  		}
>  	}
>  
> -	if (is_new) {
> -		l_queue_push_tail(node->elements, ele);
> -	} else {
> -		/* Account for internal Configuration Server model */
> -		if (idx == 0)
> -			mod_cnt += 1;
> +	if (!idx || !mods || !vendor_mods)
> +		goto fail;
>  
> -		/* Validate composition: number of models must match */
> -		if (l_queue_length(ele->models) != (mod_cnt +
> vendor_cnt))
> -			return false;
> +	l_queue_push_tail(node->elements, ele);
>  
> -		ele->path = l_strdup(path);
> -	}
> +	ele->path = l_strdup(path);
>  
>  	return true;
> +fail:
> +	l_free(ele);
> +
> +	return false;
>  }
>  
>  static void convert_node_to_storage(struct mesh_node *node,
> @@ -1415,65 +1321,61 @@ static void set_defaults(struct mesh_node
> *node)
>  }
>  
>  static bool get_app_properties(struct mesh_node *node, const char
> *path,
> -					struct l_dbus_message_iter
> *properties,
> -								bool
> is_new)
> +					struct l_dbus_message_iter
> *properties)
>  {
>  	const char *key;
>  	struct l_dbus_message_iter variant;
> -	uint16_t value;
> +	bool cid = false;
> +	bool pid = false;
> +	bool vid = false;
>  
>  	l_debug("path %s", path);
>  
> -	if (is_new) {
> -		node->comp = l_new(struct node_composition, 1);
> -		node->comp->crpl = DEFAULT_CRPL;
> -	}
> +	node->comp = l_new(struct node_composition, 1);
> +	node->comp->crpl = DEFAULT_CRPL;
>  
>  	while (l_dbus_message_iter_next_entry(properties, &key,
> &variant)) {
> -
> -		if (!strcmp(key, "CompanyID")) {
> +		if (!cid && !strcmp(key, "CompanyID")) {
>  			if (!l_dbus_message_iter_get_variant(&variant,
> "q",
> -									
> &value))
> -				return false;
> -
> -			if (!is_new && node->comp->cid != value)
> -				return false;
> -
> -			node->comp->cid = value;
> +							&node->comp-
> >cid))
> +				goto fail;
> +			cid = true;
> +			continue;
> +		}
>  
> -		} else if (!strcmp(key, "ProductID")) {
> +		if (!pid && !strcmp(key, "ProductID")) {
>  			if (!l_dbus_message_iter_get_variant(&variant,
> "q",
> -									
> &value))
> -				return false;
> -
> -			if (!is_new && node->comp->pid != value)
> -				return false;
> -
> -			node->comp->pid = value;
> +							&node->comp-
> >pid))
> +				goto fail;
> +			pid = true;
> +			continue;
> +		}
>  
> -		} else if (!strcmp(key, "VersionID")) {
> +		if (!vid && !strcmp(key, "VersionID")) {
>  			if (!l_dbus_message_iter_get_variant(&variant,
> "q",
> -									
> &value))
> -				return false;
> -
> -			if (!is_new && node->comp->vid != value)
> +							&node->comp-
> >vid))
>  				return false;
> +			vid = true;
> +			continue;
> +		}
>  
> -			node->comp->vid = value;
> -
> -		} else if (!strcmp(key, "CRPL")) {
> +		if (!strcmp(key, "CRPL")) {
>  			if (!l_dbus_message_iter_get_variant(&variant,
> "q",
> -									
> &value))
> -				return false;
> -
> -			if (!is_new && node->comp->crpl != value)
> -				return false;
> -
> -			node->comp->crpl = value;
> +							&node->comp-
> >crpl))
> +				goto fail;
> +			continue;
>  		}
>  	}
>  
> +	if (!cid || !pid || !vid)
> +		goto fail;
> +
>  	return true;
> +fail:
> +	l_free(node->comp);
> +	node->comp = NULL;
> +
> +	return false;
>  }
>  
>  static bool add_local_node(struct mesh_node *node, uint16_t unicast,
> bool kr,
> @@ -1552,18 +1454,83 @@ static bool init_storage_dir(struct mesh_node
> *node)
>  	return true;
>  }
>  
> +static bool check_req_node(struct managed_obj_request *req)
> +{
> +	uint8_t node_comp[MAX_MSG_LEN - 2];
> +	uint8_t attach_comp[MAX_MSG_LEN - 2];
> +
> +	uint16_t node_len = node_generate_comp(req->node, node_comp,
> +							sizeof(node_com
> p));
> +
> +	if (!node_len)
> +		return false;
> +
> +	if (req->type == REQUEST_TYPE_ATTACH) {
> +		uint16_t attach_len = node_generate_comp(req->attach,
> +					attach_comp,
> sizeof(attach_comp));
> +
> +		if (node_len != attach_len ||
> +				memcmp(node_comp, attach_comp,
> node_len)) {
> +			l_debug("Failed to verify app's composition
> data");
> +			return false;
> +		}
> +	}
> +
> +	return true;
> +}
> +
> +static struct mesh_node *attach_req_node(struct mesh_node *attach,
> +							struct
> mesh_node *node)
> +{
> +	const struct l_queue_entry *attach_entry;
> +	const struct l_queue_entry *node_entry;
> +
> +	attach_entry = l_queue_get_entries(attach->elements);
> +	node_entry = l_queue_get_entries(node->elements);
> +
> +	/*
> +	 * Update existing node with paths collected in temporary node,
> +	 * then remove the temporary.
> +	 * */

*/ on a separate line

> +	while (attach_entry && node_entry)
> +	{
> +		struct node_element *attach_ele = node_entry->data;

attach_ele = attach_entry->data

> +		struct node_element *node_ele = node_entry->data;
> +
> +		l_free(attach_ele->path);

I don't think we need l_free() here. The element path of the daemon-
owned node should be depopulated at this point. If this is not the
case, we have a logic hole somewhere.

> +		attach_ele->path = node_ele->path;
> +		node_ele->path = NULL;
> +
> +		attach_entry = attach_entry->next;
> +		node_entry = node_entry->next;
> +	}
> +
> +	mesh_agent_remove(attach->agent);
+	attach->agent = node->agent;
> +	node->agent = NULL;
> +
> +	attach->app_path = node->app_path;
> +	node->app_path = NULL;
> +
> +	attach->owner = node->owner;
> +	node->owner = NULL;
> +
> +	node_remove(node);
> +
> +	return attach;
> +}
> +
>  static void get_managed_objects_cb(struct l_dbus_message *msg, void
> *user_data)
>  {
>  	struct l_dbus_message_iter objects, interfaces;
>  	struct managed_obj_request *req = user_data;
>  	const char *path;
> -	struct mesh_node *node = NULL;
> +	struct mesh_node *node = req->node;
>  	void *agent = NULL;
>  	bool have_app = false;
> -	bool is_new;
> -	uint8_t num_ele;
> -
> -	is_new = (req->type != REQUEST_TYPE_ATTACH);
> +	unsigned int num_ele;
>  
>  	if (l_dbus_message_is_error(msg)) {
>  		l_error("Failed to get app's dbus objects");
> @@ -1575,14 +1542,8 @@ static void get_managed_objects_cb(struct
> l_dbus_message *msg, void *user_data)
>  		goto fail;
>  	}
>  
> -	if (is_new) {
> -		node = l_new(struct mesh_node, 1);
> +	if (!node->elements)
>  		node->elements = l_queue_new();
> -	} else {
> -		node = req->node;
> -	}
> -
> -	num_ele = 0;
>  
>  	while (l_dbus_message_iter_next_entry(&objects, &path,
> &interfaces)) {
>  		struct l_dbus_message_iter properties;
> @@ -1593,21 +1554,14 @@ static void get_managed_objects_cb(struct
> l_dbus_message *msg, void *user_data)
>  			bool res;
>  
>  			if (!strcmp(MESH_ELEMENT_INTERFACE, interface))
> {
> -
> -				if (num_ele == MAX_ELE_COUNT)
> -					goto fail;
> -
>  				res = get_element_properties(node,
> path,
> -							&properties,
> is_new);
> +								&proper
> ties);
>  				if (!res)
>  					goto fail;
> -
> -				num_ele++;
> -
>  			} else if (!strcmp(MESH_APPLICATION_INTERFACE,
>  								interfa
> ce)) {
>  				res = get_app_properties(node, path,
> -							&properties,
> is_new);
> +								&proper
> ties);
>  				if (!res)
>  					goto fail;
>  
> @@ -1637,7 +1591,7 @@ static void get_managed_objects_cb(struct
> l_dbus_message *msg, void *user_data)
>  		goto fail;
>  	}
>  
> -	if (num_ele == 0) {
> +	if (l_queue_isempty(node->elements)) {
>  		l_error("Interface %s not found",
> MESH_ELEMENT_INTERFACE);
>  		goto fail;
>  	}
> @@ -1649,17 +1603,23 @@ static void get_managed_objects_cb(struct
> l_dbus_message *msg, void *user_data)
>  		goto fail;
>  	}
>  
> +	set_defaults(node);
> +	num_ele = l_queue_length(node->elements);
> +
> +	if (num_ele > MAX_ELE_COUNT)
> +		goto fail;
> +
> +	node->num_ele = num_ele;
> +
> +	if (!check_req_node(req))
> +		goto fail;
> +
>  	if (req->type == REQUEST_TYPE_ATTACH) {
> -		if (num_ele != node->num_ele)
> -			goto fail;
> +		struct l_dbus *bus = dbus_get_bus();
>  
> -		if (register_node_object(node)) {
> -			struct l_dbus *bus = dbus_get_bus();
> +		node = attach_req_node(req->attach, node);
>  
> -			node->disc_watch =
> l_dbus_add_disconnect_watch(bus,
> -					node->owner, app_disc_cb, node,
> NULL);
> -			req->ready_cb(req->pending_msg,
> MESH_ERROR_NONE, node);
> -		} else
> +		if (!register_node_object(node))
>  			goto fail;
>  
>  		/*
> @@ -1670,30 +1630,24 @@ static void get_managed_objects_cb(struct
> l_dbus_message *msg, void *user_data)
>  		 */
>  		init_storage_dir(node);
>  
> +		node->disc_watch = l_dbus_add_disconnect_watch(bus,
> +				node->owner, app_disc_cb, node, NULL);
> +
>  	} else if (req->type == REQUEST_TYPE_JOIN) {
> -		if (!agent) {
> +		if (!node->agent) {
>  			l_error("Interface %s not found",
>  						MESH_PROVISION_AGENT_IN
> TERFACE);
>  			goto fail;
>  		}
>  
> -		node->num_ele = num_ele;
> -		set_defaults(node);
> -		memcpy(node->uuid, req->uuid, 16);
> -
>  		if (!create_node_config(node, node->uuid))
>  			goto fail;
>  
> -		req->join_ready_cb(node, agent);
>  	} else {
>  		/* Callback for create node request */
>  		struct keyring_net_key net_key;
>  		uint8_t dev_key[16];
>  
> -		node->num_ele = num_ele;
> -		set_defaults(node);
> -		memcpy(node->uuid, req->uuid, 16);
> -
>  		if (!create_node_config(node, node->uuid))
>  			goto fail;
>  
> @@ -1713,35 +1667,32 @@ static void get_managed_objects_cb(struct
> l_dbus_message *msg, void *user_data)
>  		init_storage_dir(node);
>  
>  		if (!keyring_put_remote_dev_key(node,
> DEFAULT_NEW_UNICAST,
> -							num_ele,
> dev_key))
> +						node->num_ele,
> dev_key))
>  			goto fail;
>  
>  		if (!keyring_put_net_key(node, PRIMARY_NET_IDX,
> &net_key))
>  			goto fail;
>  
> -		req->ready_cb(req->pending_msg, MESH_ERROR_NONE, node);
>  	}
>  
> +	if (req->type == REQUEST_TYPE_JOIN)
> +		req->join_ready_cb(node, node->agent);
> +	else
> +		req->ready_cb(req->pending_msg, MESH_ERROR_NONE, node);
> +
>  	return;
>  fail:
>  	if (agent)
>  		mesh_agent_remove(agent);
>  
> -	if (!is_new) {
> -		free_node_dbus_resources(node);
> +	/* Handle failed requests */
> +	if (node)
> +		node_remove(node);
>  
> -		req->ready_cb(req->pending_msg, MESH_ERROR_FAILED,
> node);
> -	} else {
> -		/* Handle failed Join and Create requests */
> -		if (node)
> -			node_remove(node);
> -
> -		if (req->type == REQUEST_TYPE_JOIN)
> -			req->join_ready_cb(NULL, NULL);
> -		else
> -			req->ready_cb(req->pending_msg,
> MESH_ERROR_FAILED,
> -									
> NULL);
> -	}
> +	if (req->type == REQUEST_TYPE_JOIN)
> +		req->join_ready_cb(NULL, NULL);
> +	else
> +		req->ready_cb(req->pending_msg, MESH_ERROR_FAILED,
> NULL);
>  }
>  
>  /* Establish relationship between application and mesh node */
> @@ -1761,13 +1712,18 @@ int node_attach(const char *app_path, const
> char *sender, uint64_t token,
>  		return MESH_ERROR_ALREADY_EXISTS;
>  	}
>  
> -	node->app_path = l_strdup(app_path);
> -	node->owner = l_strdup(sender);
> -
>  	req = l_new(struct managed_obj_request, 1);
> -	req->node = node;
> +
> +	/*
> +	 * Create a temporary node to collect composition data from
> attaching
> +	 * application. Existing node is passed in req->attach.
> +	 */
> +	req->node = node_new(node->uuid);
> +	req->node->app_path = l_strdup(app_path);
> +	req->node->owner = l_strdup(sender);
>  	req->ready_cb = cb;
>  	req->pending_msg = user_data;
> +	req->attach = node;
>  	req->type = REQUEST_TYPE_ATTACH;
>  
>  	l_dbus_method_call(dbus_get_bus(), sender, app_path,
> @@ -1789,7 +1745,7 @@ void node_join(const char *app_path, const char
> *sender, const uint8_t *uuid,
>  	l_debug("");
>  
>  	req = l_new(struct managed_obj_request, 1);
> -	req->uuid = uuid;
> +	req->node = node_new(uuid);
>  	req->join_ready_cb = cb;
>  	req->type = REQUEST_TYPE_JOIN;
>  
> @@ -1808,7 +1764,7 @@ void node_create(const char *app_path, const
> char *sender, const uint8_t *uuid,
>  	l_debug("");
>  
>  	req = l_new(struct managed_obj_request, 1);
> -	req->uuid = uuid;
> +	req->node = node_new(uuid);
>  	req->ready_cb = cb;
>  	req->pending_msg = user_data;
>  	req->type = REQUEST_TYPE_CREATE;


Regards,
Inga

[-- Attachment #2: smime.p7s --]
[-- Type: application/x-pkcs7-signature, Size: 3265 bytes --]