dbus-message-parser

A library to encode and decode DBus message.

Usage

Add this to your Cargo.toml:

[dependencies]
dbus-message-parser = "2.1"

Example

The following examples show how to create a METHOD_CALL message and a SIGNAL message.

use bytes::{Bytes, BytesMut};
use dbus_message_parser::{Decoder, Encoder, Message, Value};

fn create_method_call() {
    // Create a MessageCall
    // Arguments:
    // 1. destination
    // 2. object path
    // 3. interface
    // 4. method
    let mut msg = Message::method_call(
        "destination.address",
        "/object/path",
        "interface.name",
        "MethodName",
    );

    // Add the first argument to the MessageCall
    msg.add_value(Value::String("String Argument".to_string()));
    // Add the second argument to the MessageCall
    msg.add_value(Value::Uint32(0));

    println!("{:?}", msg);

    let mut buffer = BytesMut::new();
    let mut fds = Vec::new();
    let mut encoder = Encoder::new(&mut buffer, &mut fds);
    encoder.message(&msg).unwrap();

    println!("{:?}", buffer);
}

fn create_signal() {
    // Create a Signal
    // Arguments
    // 1. object path
    // 2. interface
    // 3. Signal name
    let mut signal = Message::signal("/object/path", "interface.name", "SignalName");

    // Add the first argument to the MessageCall
    signal.add_value(Value::Uint32(0));
    // Add the second argument to the MessageCall
    signal.add_value(Value::Double(1.0));

    println!("{:?}", signal);

    let mut buffer = BytesMut::new();
    let mut fds = Vec::new();
    let mut encoder = Encoder::new(&mut buffer, &mut fds);
    encoder.message(&signal).unwrap();

    println!("{:?}", buffer);
}

fn decode_method_call() {
    // A message encoded as bytes
    let bytes = Bytes::copy_from_slice(
        &b"\x6c\x01\x00\x01\x0a\x00\x00\x00\xb1\x00\x00\x00\x9e\x00\x00\x00\x01\x01\x6f\x00\x15\x00\
        \x00\x00\x2f\x6f\x72\x67\x2f\x66\x72\x65\x65\x64\x65\x73\x6b\x74\x6f\x70\x2f\x44\x42\x75\
        \x73\x00\x00\x00\x02\x01\x73\x00\x14\x00\x00\x00\x6f\x72\x67\x2e\x66\x72\x65\x65\x64\x65\
        \x73\x6b\x74\x6f\x70\x2e\x44\x42\x75\x73\x00\x00\x00\x00\x06\x01\x73\x00\x14\x00\x00\x00\
        \x6f\x72\x67\x2e\x66\x72\x65\x65\x64\x65\x73\x6b\x74\x6f\x70\x2e\x44\x42\x75\x73\x00\x00\
        \x00\x00\x08\x01\x67\x00\x01\x73\x00\x00\x03\x01\x73\x00\x1a\x00\x00\x00\x47\x65\x74\x43\
        \x6f\x6e\x6e\x65\x63\x74\x69\x6f\x6e\x55\x6e\x69\x78\x50\x72\x6f\x63\x65\x73\x73\x49\x44\
        \x00\x00\x00\x00\x00\x00\x07\x01\x73\x00\x05\x00\x00\x00\x3a\x31\x2e\x35\x30\x00\x00\x00\
        \x05\x00\x00\x00\x3a\x31\x2e\x35\x35\x00"[..],
    );
    // Decode the message
    let mut decoder = Decoder::new(&bytes);
    let msg = decoder.message();
    println!("Message is decoded: {:?}", msg);
}