2021-04-07 22:46:12

by Sonny Sasaka

[permalink] [raw]
Subject: [PATCH BlueZ] input/hog-lib: add error handling when calling into gatt

From: Dmitry Torokhov <[email protected]>

When calling gatt_write_char(), gatt_read_char(), etc, id == 0 indicates
error. Let's recognize this fact and log it instead of queueing request
that will never be completed.

---
profiles/input/hog-lib.c | 77 +++++++++++++++++++++++++---------------
1 file changed, 48 insertions(+), 29 deletions(-)

diff --git a/profiles/input/hog-lib.c b/profiles/input/hog-lib.c
index 6ac14e401..668f8047a 100644
--- a/profiles/input/hog-lib.c
+++ b/profiles/input/hog-lib.c
@@ -166,13 +166,16 @@ static void write_char(struct bt_hog *hog, GAttrib *attrib, uint16_t handle,
return;

id = gatt_write_char(attrib, handle, value, vlen, func, req);
-
- if (set_and_store_gatt_req(hog, req, id))
+ if (!id) {
+ error("hog: Could not write char");
return;
+ }

- error("hog: Could not read char");
- g_attrib_cancel(attrib, id);
- free(req);
+ if (!set_and_store_gatt_req(hog, req, id)) {
+ error("hog: Failed to queue write char req");
+ g_attrib_cancel(attrib, id);
+ free(req);
+ }
}

static void read_char(struct bt_hog *hog, GAttrib *attrib, uint16_t handle,
@@ -190,13 +193,16 @@ static void read_char(struct bt_hog *hog, GAttrib *attrib, uint16_t handle,
return;

id = gatt_read_char(attrib, handle, func, req);
-
- if (set_and_store_gatt_req(hog, req, id))
+ if (!id) {
+ error("hog: Could not read char");
return;
+ }

- error("hog: Could not read char");
- g_attrib_cancel(attrib, id);
- free(req);
+ if (!set_and_store_gatt_req(hog, req, id)) {
+ error("hog: Failed to queue read char req");
+ g_attrib_cancel(attrib, id);
+ free(req);
+ }
}

static void discover_desc(struct bt_hog *hog, GAttrib *attrib,
@@ -211,12 +217,16 @@ static void discover_desc(struct bt_hog *hog, GAttrib *attrib,
return;

id = gatt_discover_desc(attrib, start, end, NULL, func, req);
- if (set_and_store_gatt_req(hog, req, id))
+ if (!id) {
+ error("hog: Could not discover descriptors");
return;
+ }

- error("hog: Could not discover descriptors");
- g_attrib_cancel(attrib, id);
- free(req);
+ if (!set_and_store_gatt_req(hog, req, id)) {
+ error("hog: Failed to queue discover descriptors req");
+ g_attrib_cancel(attrib, id);
+ free(req);
+ }
}

static void discover_char(struct bt_hog *hog, GAttrib *attrib,
@@ -232,13 +242,16 @@ static void discover_char(struct bt_hog *hog, GAttrib *attrib,
return;

id = gatt_discover_char(attrib, start, end, uuid, func, req);
-
- if (set_and_store_gatt_req(hog, req, id))
+ if (!id) {
+ error("hog: Could not discover characteristic");
return;
+ }

- error("hog: Could not discover characteristic");
- g_attrib_cancel(attrib, id);
- free(req);
+ if (!set_and_store_gatt_req(hog, req, id)) {
+ error("hog: Failed to queue discover characteristic req");
+ g_attrib_cancel(attrib, id);
+ free(req);
+ }
}

static void discover_primary(struct bt_hog *hog, GAttrib *attrib,
@@ -253,13 +266,16 @@ static void discover_primary(struct bt_hog *hog, GAttrib *attrib,
return;

id = gatt_discover_primary(attrib, uuid, func, req);
-
- if (set_and_store_gatt_req(hog, req, id))
+ if (!id) {
+ error("hog: Could not send discover primary");
return;
+ }

- error("hog: Could not send discover primary");
- g_attrib_cancel(attrib, id);
- free(req);
+ if (!set_and_store_gatt_req(hog, req, id)) {
+ error("hog: Failed to queue discover primary req");
+ g_attrib_cancel(attrib, id);
+ free(req);
+ }
}

static void find_included(struct bt_hog *hog, GAttrib *attrib,
@@ -274,13 +290,16 @@ static void find_included(struct bt_hog *hog, GAttrib *attrib,
return;

id = gatt_find_included(attrib, start, end, func, req);
-
- if (set_and_store_gatt_req(hog, req, id))
+ if (!id) {
+ error("hog: Could not find included");
return;
+ }

- error("Could not find included");
- g_attrib_cancel(attrib, id);
- free(req);
+ if (!set_and_store_gatt_req(hog, req, id)) {
+ error("hog: Failed to queue find included req");
+ g_attrib_cancel(attrib, id);
+ free(req);
+ }
}

static void report_value_cb(const guint8 *pdu, guint16 len, gpointer user_data)
--
2.31.0