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#### basic_socket::lowest_layer_type

A `basic_socket` is always the lowest layer.

    typedef basic_socket< Protocol, SocketService > lowest_layer_type;

###### Types

Name | Description
--- | ---
broadcast | Socket option to permit sending of broadcast messages.
bytes_readable | IO control command to get the amount of data that can be read without blocking.
debug | Socket option to enable socket-level debugging.
do_not_route | Socket option to prevent routing, use local interfaces only.
enable_connection_aborted | Socket option to report aborted connections on accept.
endpoint_type | The endpoint type.
implementation_type | The underlying implementation type of I/O object.
keep_alive | Socket option to send keep-alives.
linger | Socket option to specify whether the socket lingers on close if unsent data is present.
lowest_layer_type | A basic_socket is always the lowest layer.
message_flags | Bitmask type for flags that can be passed to send and receive operations.
native_handle_type | The native representation of a socket.
native_type | (Deprecated: Use native_handle_type.) The native representation of a socket.
non_blocking_io | (Deprecated: Use non_blocking().) IO control command to set the blocking mode of the socket.
protocol_type | The protocol type.
receive_buffer_size | Socket option for the receive buffer size of a socket.
receive_low_watermark | Socket option for the receive low watermark.
reuse_address | Socket option to allow the socket to be bound to an address that is already in use.
send_buffer_size | Socket option for the send buffer size of a socket.
send_low_watermark | Socket option for the send low watermark.
service_type | The type of the service that will be used to provide I/O operations.
shutdown_type | Different ways a socket may be shutdown.

###### Member Functions

Name | Description
--- | ---
assign | Assign an existing native socket to the socket.
async_connect | Start an asynchronous connect.
at_mark | Determine whether the socket is at the out-of-band data mark.
available | Determine the number of bytes available for reading.
basic_socket | Construct a basic_socket without opening it. Construct and open a basic_socket. Construct a basic_socket, opening it and binding it to the given local endpoint. Construct a basic_socket on an existing native socket. Move-construct a basic_socket from another. Move-construct a basic_socket from a socket of another protocol type.
bind | Bind the socket to the given local endpoint.
cancel | Cancel all asynchronous operations associated with the socket.
close | Close the socket.
connect | Connect the socket to the specified endpoint.
get_io_service | Get the io_service associated with the object.
get_option | Get an option from the socket.
io_control | Perform an IO control command on the socket.
is_open | Determine whether the socket is open.
local_endpoint | Get the local endpoint of the socket.
lowest_layer | Get a reference to the lowest layer. Get a const reference to the lowest layer.
native | (Deprecated: Use native_handle().) Get the native socket representation.
native_handle | Get the native socket representation.
native_non_blocking | Gets the non-blocking mode of the native socket implementation. Sets the non-blocking mode of the native socket implementation.
non_blocking | Gets the non-blocking mode of the socket. Sets the non-blocking mode of the socket.
open | Open the socket using the specified protocol.
operator= | Move-assign a basic_socket from another. Move-assign a basic_socket from a socket of another protocol type.
remote_endpoint | Get the remote endpoint of the socket.
set_option | Set an option on the socket.
shutdown | Disable sends or receives on the socket.

###### Protected Member Functions

Name | Description
--- | ---
get_implementation | Get the underlying implementation of the I/O object.
get_service | Get the service associated with the I/O object.
~basic_socket | Protected destructor to prevent deletion through this type.

###### Data Members

Name | Description
--- | ---
max_connections | The maximum length of the queue of pending incoming connections.
message_do_not_route | Specify that the data should not be subject to routing.
message_end_of_record | Specifies that the data marks the end of a record.
message_out_of_band | Process out-of-band data.
message_peek | Peek at incoming data without removing it from the input queue.

###### Protected Data Members

Name | Description
--- | ---
implementation | (Deprecated: Use get_implementation().) The underlying implementation of the I/O object.
service | (Deprecated: Use get_service().) The service associated with the I/O object.

The `basic_socket` class template provides functionality that is common to both stream-oriented and datagram-oriented sockets.

###### Thread Safety

Distinct objects: Safe.

Shared objects: Unsafe.

###### Requirements

Header: `boost/asio/basic_socket.hpp`

Convenience header: `boost/asio.hpp`