base.py 文件源码

def socket_connect(descriptor, address):
    """
    Attempts to connect to the address, returns the descriptor if it succeeds,
    returns None if it needs to trampoline, and raises any exceptions.
    """
    err = descriptor.connect_ex(address)
    if err in CONNECT_ERR:
        return None
    if err not in CONNECT_SUCCESS:
        raise socket.error(err, errno.errorcode[err])
    return descriptor