_utils.py 文件源码

def bcast_socket(socket_module=socket):
    """
    Make a socket and configure it for UDP broadcast.

    Parameters
    ----------
    socket_module: module, optional
        Default is the built-in :mod:`socket` module, but anything with the
        same interface may be used, such as :mod:`curio.socket`.
    """
    socket = socket_module
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)

    # for BSD/Darwin only
    try:
        socket.SO_REUSEPORT
    except AttributeError:
        ...
    else:
        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
    return sock