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use chan::Sender;
use dbus::{Connection, BusType, ConnectionItem, FromMessageItem,
Message, MessageItem, NameFlag};
use dbus::obj::{Argument, Interface, Method, MethodResult, ObjectPath};
use std::thread;
use std::convert::From;
use datatype::{Command, DBusConfig, Event, InstalledFirmware, InstalledPackage,
InstalledSoftware, OperationResult, UpdateReport};
use datatype::dbus;
use super::{Gateway, Interpret};
/// The `DBus` gateway is used with the RVI module for communicating with the
/// system session bus.
pub struct DBus {
pub dbus_cfg: DBusConfig,
pub itx: Sender<Interpret>,
}
impl Gateway for DBus {
fn initialize(&mut self, itx: Sender<Interpret>) -> Result<(), String> {
let dbus_cfg = self.dbus_cfg.clone();
thread::spawn(move || {
let conn = Connection::get_private(BusType::Session).expect("couldn't get dbus session");
conn.register_name(&dbus_cfg.name, NameFlag::ReplaceExisting as u32).expect("couldn't register name");
let mut obj_path = ObjectPath::new(&conn, &dbus_cfg.path, true);
obj_path.insert_interface(&dbus_cfg.interface, default_interface(itx));
obj_path.set_registered(true).expect("couldn't set registration status");
loop {
for item in conn.iter(1000) {
if let ConnectionItem::MethodCall(mut msg) = item {
match obj_path.handle_message(&mut msg) {
Some(Ok(())) => info!("DBus message sent: {:?}", msg),
Some(Err(())) => error!("DBus message send failed: {:?}", msg),
None => debug!("unhandled dbus message: {:?}", msg)
}
}
}
}
});
Ok(info!("DBus gateway started."))
}
fn pulse(&self, event: Event) {
match event {
Event::UpdateAvailable(avail) => {
let msg = self.new_swm_message("updateAvailable", &[
MessageItem::from(avail.update_id),
MessageItem::from(avail.signature),
MessageItem::from(avail.description),
MessageItem::from(avail.request_confirmation)
]);
let conn = Connection::get_private(BusType::Session).expect("couldn't get dbus session");
let _ = conn.send(msg).map_err(|_| error!("couldn't send updateAvailable message"));
}
Event::DownloadComplete(comp) => {
let msg = self.new_swm_message("downloadComplete", &[
MessageItem::from(comp.update_image),
MessageItem::from(comp.signature)
]);
let conn = Connection::get_private(BusType::Session).expect("couldn't get dbus session");
let _ = conn.send(msg).map_err(|_| error!("couldn't send downloadComplete message"));
}
Event::InstalledSoftwareNeeded => {
let msg = self.new_swm_message("getInstalledPackages", &[
MessageItem::from(true), // include packages?
MessageItem::from(false) // include firmware?
]);
let conn = Connection::get_private(BusType::Session).expect("couldn't get dbus session");
let reply = conn.send_with_reply_and_block(msg, self.dbus_cfg.timeout).unwrap();
let _ = || -> Result<InstalledSoftware, ()> {
let mut args = reply.get_items().into_iter();
let pkg_arg = try!(args.next().ok_or(()));
let msgs: &Vec<MessageItem> = try!(FromMessageItem::from(&pkg_arg));
let packages = try!(msgs.into_iter()
.map(|item| -> Result<InstalledPackage, ()> {
FromMessageItem::from(item)
}).collect::<Result<Vec<InstalledPackage>, ()>>());
let firm_arg = try!(args.next().ok_or(()));
let msgs: &Vec<MessageItem> = try!(FromMessageItem::from(&firm_arg));
let firmwares = try!(msgs.into_iter()
.map(|item| -> Result<InstalledFirmware, ()> {
FromMessageItem::from(item)
}).collect::<Result<Vec<InstalledFirmware>, ()>>());
Ok(InstalledSoftware::new(packages, firmwares))
}().map(|inst| send(&self.itx, Command::SendInstalledSoftware(inst)))
.map_err(|_| error!("unable to ReportInstalledSoftware"));
}
_ => ()
}
}
}
impl DBus {
fn new_swm_message(&self, method: &str, args: &[MessageItem]) -> Message {
let mgr = self.dbus_cfg.software_manager.clone();
let path = self.dbus_cfg.software_manager_path.clone();
let result = Message::new_method_call(&mgr, &path, &mgr, method);
let mut msg = result.expect("couldn't create dbus message");
msg.append_items(args);
msg
}
}
fn default_interface<'i>(itx: Sender<Interpret>) -> Interface<'i> {
let initiate_itx = itx.clone();
let initiate_download = Method::new(
"initiateDownload",
vec![Argument::new("update_id", "s")],
vec![],
Box::new(move |msg| handle_initiate_download(&initiate_itx, msg))
);
let update_itx = itx.clone();
let update_report = Method::new(
"updateReport",
vec![Argument::new("update_id", "s"), Argument::new("operations_results", "aa{sv}")],
vec![],
Box::new(move |msg| handle_update_report(&update_itx, msg))
);
Interface::new(vec![initiate_download, update_report], vec![], vec![])
}
fn send(itx: &Sender<Interpret>, cmd: Command) {
itx.send(Interpret { command: cmd, response_tx: None });
}
fn handle_initiate_download(itx: &Sender<Interpret>, msg: &mut Message) -> MethodResult {
let sender = try!(msg.sender().map(|s| s.to_string()).ok_or(dbus::missing_arg()));
debug!("dbus handle_initiate_download: sender={:?}, msg={:?}", sender, msg);
let mut args = msg.get_items().into_iter();
let arg_id = try!(args.next().ok_or(dbus::missing_arg()));
let update_id: &String = try!(FromMessageItem::from(&arg_id).or(Err(dbus::malformed_arg())));
send(itx, Command::StartDownload(update_id.clone()));
Ok(vec![])
}
fn handle_update_report(itx: &Sender<Interpret>, msg: &mut Message) -> MethodResult {
let sender = try!(msg.sender().map(|s| s.to_string()).ok_or(dbus::missing_arg()));
debug!("dbus handle_update_report: sender={:?}, msg={:?}", sender, msg);
let mut args = msg.get_items().into_iter();
let id_arg = try!(args.next().ok_or(dbus::missing_arg()));
let update_id: &String = try!(FromMessageItem::from(&id_arg).or(Err(dbus::malformed_arg())));
let results_arg = try!(args.next().ok_or(dbus::missing_arg()));
let msgs: &Vec<MessageItem> = try!(FromMessageItem::from(&results_arg).or(Err(dbus::malformed_arg())));
let results = try!(msgs.into_iter()
.map(|item| -> Result<OperationResult, ()> { FromMessageItem::from(item) })
.collect::<Result<Vec<OperationResult>, ()>>()
.or(Err(dbus::malformed_arg()))
);
send(itx, Command::SendUpdateReport(UpdateReport::new(update_id.clone(), results)));
Ok(vec![])
}
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