[RFC 3/4] android/bluetooth: Add support for storing link keys

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When new linkkey event is received store linkkey in devices info file.
Stored info includes linkkey, linkkey type and pin length.
---
 android/bluetooth.c | 38 ++++++++++++++++++++++++++++++++++----
 1 file changed, 34 insertions(+), 4 deletions(-)

diff --git a/android/bluetooth.c b/android/bluetooth.c
index 69412dd..0ef6191 100644
--- a/android/bluetooth.c
+++ b/android/bluetooth.c
@@ -496,7 +496,37 @@ static void mgmt_dev_class_changed_event(uint16_t index, uint16_t length,
 static void store_link_key(const bdaddr_t *dst, const uint8_t *key,
 					uint8_t type, uint8_t pin_length)
 {
-	/* TODO store link key */
+	GKeyFile *key_file;
+	char key_str[35];
+	gsize length = 0;
+	char addr[18];
+	char *data;
+	int i;
+
+	key_file = g_key_file_new();
+
+	if (!g_key_file_load_from_file(key_file, ANDROID_STORAGEDIR"/devices",
+								0, NULL))
+		return;
+
+	ba2str(dst, addr);
+
+	DBG("%s type %u pin_len %u", addr, type, pin_length);
+
+	key_str[0] = '0';
+	key_str[1] = 'x';
+	for (i = 0; i < 16; i++)
+		sprintf(key_str + 2 + (i * 2), "%2.2X", key[i]);
+
+	g_key_file_set_string(key_file, addr, "LinkKey", key_str);
+	g_key_file_set_integer(key_file, addr, "LinkKeyType", type);
+	g_key_file_set_integer(key_file, addr, "LinkKeyPINLength", pin_length);
+
+	data = g_key_file_to_data(key_file, &length, NULL);
+	g_file_set_contents(ANDROID_STORAGEDIR"/devices", data, length, NULL);
+	g_free(data);
+
+	g_key_file_free(key_file);
 }
 
 static void send_bond_state_change(const bdaddr_t *addr, uint8_t status,
@@ -723,6 +753,9 @@ static void new_link_key_callback(uint16_t index, uint16_t length,
 		return;
 	}
 
+	set_device_bond_state(&addr->bdaddr, HAL_STATUS_SUCCESS,
+							HAL_BOND_STATE_BONDED);
+
 	if (ev->store_hint) {
 		const struct mgmt_link_key_info *key = &ev->key;
 
@@ -730,9 +763,6 @@ static void new_link_key_callback(uint16_t index, uint16_t length,
 								key->pin_len);
 	}
 
-	set_device_bond_state(&addr->bdaddr, HAL_STATUS_SUCCESS,
-							HAL_BOND_STATE_BONDED);
-
 	browse_remote_sdp(&addr->bdaddr);
 }
 
-- 
1.8.3.2

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