This patch adds to debugfs the le_auto_conn file. This file will be
used to test LE auto connection infrastructure.
This file accept writes in the following format:
"add <address> <address_type> [auto_connect]"
"del <address> <address_type>"
"clr"
The <address type> values are:
* 0 for public address
* 1 for random address
The [auto_connect] values are (for more details see struct hci_
conn_params):
* 0 for disabled (default)
* 1 for always
* 2 for link loss
So for instance, if you want the kernel autonomously establishes
connections with device AA:BB:CC:DD:EE:FF (public address) every
time the device enters in connectable mode (starts advertising),
you should run the command:
$ echo "add AA:BB:CC:DD:EE:FF 0 1" > /sys/kernel/debug/bluetooth/hci0/le_auto_conn
To delete the connection parameters for that device, run the command:
$ echo "del AA:BB:CC:DD:EE:FF 0" > /sys/kernel/debug/bluetooth/hci0/le_auto_conn
To clear the connection parameters list, run the command:
$ echo "clr" > /sys/kernel/debug/bluetooth/hci0/le_auto_conn
Finally. to get the list of connection parameters configured in kernel,
read the le_auto_conn file:
$ cat /sys/kernel/debug/bluetooth/hci0/le_auto_conn
This file is created only if LE is enabled.
Signed-off-by: Andre Guedes <andre.guedes@xxxxxxxxxxxxx>
---
net/bluetooth/hci_core.c | 111 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 111 insertions(+)
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 6d83ca0..0b96f20 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -896,6 +896,115 @@ static const struct file_operations lowpan_debugfs_fops = {
.llseek = default_llseek,
};
+static int le_auto_conn_show(struct seq_file *sf, void *ptr)
+{
+ struct hci_dev *hdev = sf->private;
+ struct hci_conn_params *p;
+
+ hci_dev_lock(hdev);
+
+ list_for_each_entry(p, &hdev->le_conn_params, list) {
+ seq_printf(sf, "%pMR %u %u\n", &p->addr, p->addr_type,
+ p->auto_connect);
+ }
+
+ hci_dev_unlock(hdev);
+
+ return 0;
+}
+
+static int le_auto_conn_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, le_auto_conn_show, inode->i_private);
+}
+
+static ssize_t le_auto_conn_write(struct file *file, const char __user *data,
+ size_t count, loff_t *offset)
+{
+ struct seq_file *sf = file->private_data;
+ struct hci_dev *hdev = sf->private;
+ u8 auto_connect = 0;
+ bdaddr_t addr;
+ u8 addr_type;
+ char *buf;
+ int err = 0;
+ int n;
+
+ /* Don't allow partial write */
+ if (*offset != 0)
+ return -EINVAL;
+
+ if (count < 3)
+ return -EINVAL;
+
+ buf = kzalloc(count, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ if (copy_from_user(buf, data, count)) {
+ err = -EFAULT;
+ goto done;
+ }
+
+ if (memcmp(buf, "add", 3) == 0) {
+ n = sscanf(&buf[4], "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx %hhu %hhu",
+ &addr.b[5], &addr.b[4], &addr.b[3], &addr.b[2],
+ &addr.b[1], &addr.b[0], &addr_type,
+ &auto_connect);
+
+ if (n < 7) {
+ err = -EINVAL;
+ goto done;
+ }
+
+ hci_dev_lock(hdev);
+ err = hci_conn_params_add(hdev, &addr, addr_type, auto_connect,
+ hdev->le_conn_min_interval,
+ hdev->le_conn_max_interval);
+ hci_dev_unlock(hdev);
+
+ if (err)
+ goto done;
+ } else if (memcmp(buf, "del", 3) == 0) {
+ n = sscanf(&buf[4], "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx %hhu",
+ &addr.b[5], &addr.b[4], &addr.b[3], &addr.b[2],
+ &addr.b[1], &addr.b[0], &addr_type);
+
+ if (n < 7) {
+ err = -EINVAL;
+ goto done;
+ }
+
+ hci_dev_lock(hdev);
+ hci_conn_params_del(hdev, &addr, addr_type);
+ hci_dev_unlock(hdev);
+ } else if (memcmp(buf, "clr", 3) == 0) {
+ hci_dev_lock(hdev);
+ hci_conn_params_clear(hdev);
+ hci_pend_le_conns_clear(hdev);
+ hci_update_background_scan(hdev);
+ hci_dev_unlock(hdev);
+ } else {
+ err = -EINVAL;
+ }
+
+done:
+ kfree(buf);
+
+ if (err)
+ return err;
+ else
+ return count;
+}
+
+static const struct file_operations le_auto_conn_fops = {
+ .open = le_auto_conn_open,
+ .read = seq_read,
+ .write = le_auto_conn_write,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
/* ---- HCI requests ---- */
static void hci_req_sync_complete(struct hci_dev *hdev, u8 result)
@@ -1694,6 +1803,8 @@ static int __hci_init(struct hci_dev *hdev)
hdev, &adv_channel_map_fops);
debugfs_create_file("6lowpan", 0644, hdev->debugfs, hdev,
&lowpan_debugfs_fops);
+ debugfs_create_file("le_auto_conn", 0644, hdev->debugfs, hdev,
+ &le_auto_conn_fops);
}
return 0;
--
1.8.5.4
--
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