Bluetooth: Add support for per socket msg_name callback
This allows to add a per socket msg_name callback that can be used
for updating the msg_name information for recvmsg() system calls.
This feature is used by another patch to support address information
on L2CAP connectionless channels.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c
index 9c7e4ed..f0aadea 100644
--- a/net/bluetooth/af_bluetooth.c
+++ b/net/bluetooth/af_bluetooth.c
@@ -221,12 +221,12 @@
if (flags & (MSG_OOB))
return -EOPNOTSUPP;
- msg->msg_namelen = 0;
-
skb = skb_recv_datagram(sk, flags, noblock, &err);
if (!skb) {
- if (sk->sk_shutdown & RCV_SHUTDOWN)
+ if (sk->sk_shutdown & RCV_SHUTDOWN) {
+ msg->msg_namelen = 0;
return 0;
+ }
return err;
}
@@ -238,9 +238,16 @@
skb_reset_transport_header(skb);
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
- if (err == 0)
+ if (err == 0) {
sock_recv_ts_and_drops(msg, sk, skb);
+ if (bt_sk(sk)->skb_msg_name)
+ bt_sk(sk)->skb_msg_name(skb, msg->msg_name,
+ &msg->msg_namelen);
+ else
+ msg->msg_namelen = 0;
+ }
+
skb_free_datagram(sk, skb);
return err ? : copied;