Type Alias RequestMessage 

pub type RequestMessage = Message;

Type alias for version 3 request messages

This is a convenience alias for request::Message that makes it clear we’re working with protocol v3 requests.

Aliased Type

pub enum RequestMessage {
    Devices,
    Watch(Option<Watch>),
    Device(Option<Device>),
    Poll,
    Version,
}

Variants

Devices

Request a list of all GPS devices known to GPSD

Command: ?DEVICES;

Watch(Option<Watch>)

Control data streaming from GPSD

• None: Query current watch settings (?WATCH;)
• Some(watch): Set watch parameters (?WATCH={...};)

Device(Option<Device>)

Control or query a specific GPS device

• None: Query current device (?DEVICE;)
• Some(device): Configure device (?DEVICE={...};)

Poll

Poll for current GPS data from all devices

Command: ?POLL;

Version

Request GPSD version information

Command: ?VERSION;

Trait Implementations

impl GpsdJsonRequest for RequestMessage

fn to_command(&self) -> String

Converts a request message into a GPSD command string

Each request type is formatted according to the GPSD protocol:

• Simple commands: ?COMMAND;
• Commands with parameters: ?COMMAND={"json":"params"};