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The L2CAP connectionless channels use SOCK_DGRAM and recvmsg() and need to receive the remote BD_ADDR and PSM information via msg_name from the recvmsg() system call. So in case the L2CAP socket is for connectionless channels, provide a msg_name callback that can update the data. Also store the remote BD_ADDR and PSM in the skb so it can be extracted later on. Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>