[PATCH BlueZ 0/4] Allow some composition fields update

[PATCH BlueZ 0/4] Allow some composition fields update

[Inga Stotland]

This patchset modifies how we verify the integrity of an existing
node when processing Attach() call.

The changes:
- Vericifaction includes only element/models relationship: this should
  stay constant during node's lifetime.
- Allow updating of CID, PID, VID and CRPL.
- Some general cleanup related to saving node configuration.

Inga Stotland (4):
  mesh: On node attach, verify element/model composition only
  mesh: Avoid saving duplicate fields in node config
  mesh: Allow updating CID, PID, VID & CRPL on node attach
  mesh: Remove redundant call to save node configuration

 mesh/mesh-config-json.c | 56 +++++++++++++++++++++++++++++++++--------
 mesh/mesh-config.h      |  4 +++
 mesh/node.c             | 29 +++++++++++++++------
 3 files changed, 71 insertions(+), 18 deletions(-)

-- 
2.21.3

[PATCH BlueZ 1/4] mesh: On node attach, verify element/model composition only

[Inga Stotland]

When attaching an existing node, verify only the "elements" part
of device composition, i.e., skip verification of CID/PID/VID, CRPL
and features.
---
 mesh/node.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/mesh/node.c b/mesh/node.c
index acda6d472..e3f9e52e3 100644
--- a/mesh/node.c
+++ b/mesh/node.c
@@ -1378,7 +1378,7 @@ 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 offset = 10;
 	uint16_t node_len = node_generate_comp(req->node, node_comp,
 							sizeof(node_comp));
 
@@ -1389,12 +1389,10 @@ static bool check_req_node(struct managed_obj_request *req)
 		uint16_t attach_len = node_generate_comp(req->attach,
 					attach_comp, sizeof(attach_comp));
 
-		/* Ignore feature bits in Composition Compare */
-		node_comp[8] = 0;
-		attach_comp[8] = 0;
-
+		/* Verify only element/models composition */
 		if (node_len != attach_len ||
-				memcmp(node_comp, attach_comp, node_len)) {
+				memcmp(&node_comp[offset], &attach_comp[offset],
+							node_len - offset)) {
 			l_debug("Failed to verify app's composition data");
 			return false;
 		}
-- 
2.21.3

Re: [PATCH BlueZ 1/4] mesh: On node attach, verify element/model composition only

[Gix, Brian]

Applying this patch of the set early, due to popular demand.

On Fri, 2020-05-08 at 17:00 -0700, Inga Stotland wrote:
> When attaching an existing node, verify only the "elements" part
> of device composition, i.e., skip verification of CID/PID/VID, CRPL
> and features.
> ---
>  mesh/node.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/mesh/node.c b/mesh/node.c
> index acda6d472..e3f9e52e3 100644
> --- a/mesh/node.c
> +++ b/mesh/node.c
> @@ -1378,7 +1378,7 @@ 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 offset = 10;
>  	uint16_t node_len = node_generate_comp(req->node, node_comp,
>  							sizeof(node_comp));
>  
> @@ -1389,12 +1389,10 @@ static bool check_req_node(struct managed_obj_request *req)
>  		uint16_t attach_len = node_generate_comp(req->attach,
>  					attach_comp, sizeof(attach_comp));
>  
> -		/* Ignore feature bits in Composition Compare */
> -		node_comp[8] = 0;
> -		attach_comp[8] = 0;
> -
> +		/* Verify only element/models composition */
>  		if (node_len != attach_len ||
> -				memcmp(node_comp, attach_comp, node_len)) {
> +				memcmp(&node_comp[offset], &attach_comp[offset],
> +							node_len - offset)) {
>  			l_debug("Failed to verify app's composition data");
>  			return false;
>  		}

Re: [PATCH BlueZ 1/4] mesh: On node attach, verify element/model composition only

[Gix, Brian]

full Patchset Applied

On Fri, 2020-05-08 at 17:00 -0700, Inga Stotland wrote:
> When attaching an existing node, verify only the "elements" part
> of device composition, i.e., skip verification of CID/PID/VID, CRPL
> and features.
> ---
>  mesh/node.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/mesh/node.c b/mesh/node.c
> index acda6d472..e3f9e52e3 100644
> --- a/mesh/node.c
> +++ b/mesh/node.c
> @@ -1378,7 +1378,7 @@ 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 offset = 10;
>  	uint16_t node_len = node_generate_comp(req->node, node_comp,
>  							sizeof(node_comp));
>  
> @@ -1389,12 +1389,10 @@ static bool check_req_node(struct managed_obj_request *req)
>  		uint16_t attach_len = node_generate_comp(req->attach,
>  					attach_comp, sizeof(attach_comp));
>  
> -		/* Ignore feature bits in Composition Compare */
> -		node_comp[8] = 0;
> -		attach_comp[8] = 0;
> -
> +		/* Verify only element/models composition */
>  		if (node_len != attach_len ||
> -				memcmp(node_comp, attach_comp, node_len)) {
> +				memcmp(&node_comp[offset], &attach_comp[offset],
> +							node_len - offset)) {
>  			l_debug("Failed to verify app's composition data");
>  			return false;
>  		}

[PATCH BlueZ 2/4] mesh: Avoid saving duplicate fields in node config

[Inga Stotland]

This modifies miscellaneous utility functions in mesh-config-json.c:
when writing a new value to a node configuration file, delete
the existing field containing an old value first.
---
 mesh/mesh-config-json.c | 24 ++++++++++++++----------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/mesh/mesh-config-json.c b/mesh/mesh-config-json.c
index 7362112f2..ce7058b5a 100644
--- a/mesh/mesh-config-json.c
+++ b/mesh/mesh-config-json.c
@@ -105,7 +105,7 @@ static bool get_int(json_object *jobj, const char *keyword, int *value)
 	return true;
 }
 
-static bool add_u64_value(json_object *jobject, const char *desc,
+static bool add_u64_value(json_object *jobj, const char *desc,
 					const uint8_t u64[8])
 {
 	json_object *jstring;
@@ -116,11 +116,12 @@ static bool add_u64_value(json_object *jobject, const char *desc,
 	if (!jstring)
 		return false;
 
-	json_object_object_add(jobject, desc, jstring);
+	json_object_object_del(jobj, desc);
+	json_object_object_add(jobj, desc, jstring);
 	return true;
 }
 
-static bool add_key_value(json_object *jobject, const char *desc,
+static bool add_key_value(json_object *jobj, const char *desc,
 					const uint8_t key[16])
 {
 	json_object *jstring;
@@ -131,7 +132,8 @@ static bool add_key_value(json_object *jobject, const char *desc,
 	if (!jstring)
 		return false;
 
-	json_object_object_add(jobject, desc, jstring);
+	json_object_object_del(jobj, desc);
+	json_object_object_add(jobj, desc, jstring);
 	return true;
 }
 
@@ -1398,6 +1400,7 @@ static bool write_uint16_hex(json_object *jobj, const char *desc,
 	if (!jstring)
 		return false;
 
+	json_object_object_del(jobj, desc);
 	json_object_object_add(jobj, desc, jstring);
 	return true;
 }
@@ -1412,21 +1415,21 @@ static bool write_uint32_hex(json_object *jobj, const char *desc, uint32_t val)
 	if (!jstring)
 		return false;
 
+	json_object_object_del(jobj, desc);
 	json_object_object_add(jobj, desc, jstring);
 	return true;
 }
 
-static bool write_int(json_object *jobj, const char *keyword, int val)
+static bool write_int(json_object *jobj, const char *desc, int val)
 {
 	json_object *jvalue;
 
-	json_object_object_del(jobj, keyword);
-
 	jvalue = json_object_new_int(val);
 	if (!jvalue)
 		return false;
 
-	json_object_object_add(jobj, keyword, jvalue);
+	json_object_object_del(jobj, desc);
+	json_object_object_add(jobj, desc, jvalue);
 	return true;
 }
 
@@ -1442,7 +1445,7 @@ static const char *mode_to_string(int mode)
 	}
 }
 
-static bool write_mode(json_object *jobj, const char *keyword, int value)
+static bool write_mode(json_object *jobj, const char *desc, int value)
 {
 	json_object *jstring;
 
@@ -1451,7 +1454,8 @@ static bool write_mode(json_object *jobj, const char *keyword, int value)
 	if (!jstring)
 		return false;
 
-	json_object_object_add(jobj, keyword, jstring);
+	json_object_object_del(jobj, desc);
+	json_object_object_add(jobj, desc, jstring);
 
 	return true;
 }
-- 
2.21.3

[PATCH BlueZ 3/4] mesh: Allow updating CID, PID, VID & CRPL on node attach

[Inga Stotland]

This allows to update settings of the following composition fields
when an existing node (application) attaches to the daemon:
Company ID (CID), Product ID (PID), Versioin ID (VID),
CRPL (replay protection depth)
---
 mesh/mesh-config-json.c | 32 ++++++++++++++++++++++++++++++++
 mesh/mesh-config.h      |  4 ++++
 mesh/node.c             | 17 +++++++++++++++++
 3 files changed, 53 insertions(+)

diff --git a/mesh/mesh-config-json.c b/mesh/mesh-config-json.c
index ce7058b5a..9ac3979f8 100644
--- a/mesh/mesh-config-json.c
+++ b/mesh/mesh-config-json.c
@@ -2057,6 +2057,38 @@ bool mesh_config_write_ttl(struct mesh_config *cfg, uint8_t ttl)
 	return save_config(cfg->jnode, cfg->node_dir_path);
 }
 
+bool mesh_config_update_company_id(struct mesh_config *cfg, uint16_t cid)
+{
+	if (!cfg || !write_uint16_hex(cfg->jnode, "cid", cid))
+		return false;
+
+	return save_config(cfg->jnode, cfg->node_dir_path);
+}
+
+bool mesh_config_update_product_id(struct mesh_config *cfg, uint16_t pid)
+{
+	if (!cfg || !write_uint16_hex(cfg->jnode, "pid", pid))
+		return false;
+
+	return save_config(cfg->jnode, cfg->node_dir_path);
+}
+
+bool mesh_config_update_version_id(struct mesh_config *cfg, uint16_t vid)
+{
+	if (!cfg || !write_uint16_hex(cfg->jnode, "vid", vid))
+		return false;
+
+	return save_config(cfg->jnode, cfg->node_dir_path);
+}
+
+bool mesh_config_update_crpl(struct mesh_config *cfg, uint16_t crpl)
+{
+	if (!cfg || !write_uint16_hex(cfg->jnode, "crpl", crpl))
+		return false;
+
+	return save_config(cfg->jnode, cfg->node_dir_path);
+}
+
 static bool load_node(const char *fname, const uint8_t uuid[16],
 				mesh_config_node_func_t cb, void *user_data)
 {
diff --git a/mesh/mesh-config.h b/mesh/mesh-config.h
index a5b12bbad..25002f5a7 100644
--- a/mesh/mesh-config.h
+++ b/mesh/mesh-config.h
@@ -172,3 +172,7 @@ bool mesh_config_net_key_set_phase(struct mesh_config *cfg, uint16_t idx,
 bool mesh_config_write_address(struct mesh_config *cfg, uint16_t address);
 bool mesh_config_write_iv_index(struct mesh_config *cfg, uint32_t idx,
 								bool update);
+bool mesh_config_update_company_id(struct mesh_config *cfg, uint16_t cid);
+bool mesh_config_update_product_id(struct mesh_config *cfg, uint16_t pid);
+bool mesh_config_update_version_id(struct mesh_config *cfg, uint16_t vid);
+bool mesh_config_update_crpl(struct mesh_config *cfg, uint16_t crpl);
diff --git a/mesh/node.c b/mesh/node.c
index e3f9e52e3..a96c0cae1 100644
--- a/mesh/node.c
+++ b/mesh/node.c
@@ -1374,6 +1374,21 @@ static bool add_local_node(struct mesh_node *node, uint16_t unicast, bool kr,
 	return true;
 }
 
+static void update_composition(struct mesh_node *node, struct mesh_node *attach)
+{
+	if (node->comp.cid != attach->comp.cid)
+		mesh_config_update_company_id(node->cfg, attach->comp.cid);
+
+	if (node->comp.pid != attach->comp.pid)
+		mesh_config_update_product_id(node->cfg, attach->comp.pid);
+
+	if (node->comp.vid != attach->comp.vid)
+		mesh_config_update_version_id(node->cfg, attach->comp.vid);
+
+	if (node->comp.crpl != attach->comp.crpl)
+		mesh_config_update_crpl(node->cfg, attach->comp.crpl);
+}
+
 static bool check_req_node(struct managed_obj_request *req)
 {
 	uint8_t node_comp[MAX_MSG_LEN - 2];
@@ -1444,6 +1459,8 @@ static bool attach_req_node(struct mesh_node *attach, struct mesh_node *node)
 	attach->owner = node->owner;
 	node->owner = NULL;
 
+	update_composition(node, attach);
+
 	node_remove(node);
 
 	return true;
-- 
2.21.3

[PATCH BlueZ 4/4] mesh: Remove redundant call to save node configuration

[Inga Stotland]

This removes a redundant call to save node configuration in
add_local_node(): there is a number of unconditional calls to
mesh_config_write_<some_node_Setting>() within this function
which would result in the node configuration being saved implicitly.
---
 mesh/node.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/mesh/node.c b/mesh/node.c
index a96c0cae1..8914b639d 100644
--- a/mesh/node.c
+++ b/mesh/node.c
@@ -1366,8 +1366,6 @@ static bool add_local_node(struct mesh_node *node, uint16_t unicast, bool kr,
 
 	update_net_settings(node);
 
-	mesh_config_save(node->cfg, true, NULL, NULL);
-
 	/* Initialize configuration server model */
 	cfgmod_server_init(node, PRIMARY_ELE_IDX);
 
-- 
2.21.3