From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
This command can be used to read attributes, it only works if an
attribute has been selected with select-attribute.
---
client/gatt.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
client/gatt.h | 2 ++
client/main.c | 11 +++++++++++
3 files changed, 72 insertions(+)
diff --git a/client/gatt.c b/client/gatt.c
index 8fb3f62..ce709c8 100644
--- a/client/gatt.c
+++ b/client/gatt.c
@@ -326,3 +326,62 @@ char *gatt_attribute_generator(const char *text, int state)
return attribute_generator(text, state, list);
}
+
+static void read_reply(DBusMessage *message, void *user_data)
+{
+ DBusError error;
+ DBusMessageIter iter, array;
+ uint8_t *value;
+ int len;
+
+ dbus_error_init(&error);
+
+ if (dbus_set_error_from_message(&error, message) == TRUE) {
+ rl_printf("Failed to read: %s\n", error.name);
+ dbus_error_free(&error);
+ return;
+ }
+
+ dbus_message_iter_init(message, &iter);
+
+ if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) {
+ rl_printf("Invalid response to read\n");
+ return;
+ }
+
+ dbus_message_iter_recurse(&iter, &array);
+ dbus_message_iter_get_fixed_array(&array, &value, &len);
+
+ if (len < 0) {
+ rl_printf("Unable to parse value\n");
+ return;
+ }
+
+ rl_hexdump(value, len);
+}
+
+static void read_attribute(GDBusProxy *proxy)
+{
+ if (g_dbus_proxy_method_call(proxy, "ReadValue", NULL, read_reply,
+ NULL, NULL) == FALSE) {
+ rl_printf("Failed to read\n");
+ return;
+ }
+
+ rl_printf("Attempting to read %s\n", g_dbus_proxy_get_path(proxy));
+}
+
+void gatt_read_attribute(GDBusProxy *proxy)
+{
+ const char *iface;
+
+ iface = g_dbus_proxy_get_interface(proxy);
+ if (!strcmp(iface, "org.bluez.GattCharacteristic1") ||
+ !strcmp(iface, "org.bluez.GattDescriptor1")) {
+ read_attribute(proxy);
+ return;
+ }
+
+ rl_printf("Unable to read attribute %s\n",
+ g_dbus_proxy_get_path(proxy));
+}
diff --git a/client/gatt.h b/client/gatt.h
index bb7cb1c..ac18a2a 100644
--- a/client/gatt.h
+++ b/client/gatt.h
@@ -33,3 +33,5 @@ void gatt_remove_descriptor(GDBusProxy *proxy);
void gatt_list_attributes(const char *device);
GDBusProxy *gatt_select_attribute(const char *path);
char *gatt_attribute_generator(const char *text, int state);
+
+void gatt_read_attribute(GDBusProxy *proxy);
diff --git a/client/main.c b/client/main.c
index 614efca..04cb51b 100644
--- a/client/main.c
+++ b/client/main.c
@@ -1276,6 +1276,16 @@ static void cmd_attribute_info(const char *arg)
}
}
+static void cmd_read(const char *arg)
+{
+ if (!default_attr) {
+ rl_printf("No attribute selected\n");
+ return;
+ }
+
+ gatt_read_attribute(default_attr);
+}
+
static void cmd_version(const char *arg)
{
rl_printf("Version %s\n", VERSION);
@@ -1405,6 +1415,7 @@ static const struct {
"Select attribute", attribute_generator },
{ "attribute-info", "[attribute]", cmd_attribute_info,
"Select attribute", attribute_generator },
+ { "read", NULL, cmd_read, "Read attribute value" },
{ "version", NULL, cmd_version, "Display version" },
{ "quit", NULL, cmd_quit, "Quit program" },
{ "exit", NULL, cmd_quit },
--
2.1.0
--
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