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|
use crate::file::{DownloadHandler, FileSender};
use crate::port::{ForwardHandler, PortExposer};
use crate::{Command, State};
use anyhow::bail;
use libkeks::{
instance::Instance,
peer::Peer,
protocol::{ChatMesssage, ProvideInfo, RelayMessage},
};
use log::{debug, error, info};
use std::{os::unix::prelude::MetadataExt, sync::Arc};
use tokio::{fs, net::TcpListener, sync::RwLock};
pub(crate) async fn dispatch_command(
inst: &Arc<Instance>,
state: &Arc<RwLock<State>>,
command: Command,
) -> anyhow::Result<()> {
match command {
Command::List => {
let peers = inst.peers.read().await;
for p in peers.values() {
let username = p
.username
.read()
.await
.clone()
.unwrap_or("<unknown>".to_string());
info!("{username}:");
for (rid, r) in p.remote_provided.read().await.iter() {
info!(
"\t{rid:?}: {} {:?}",
r.kind,
r.label.clone().unwrap_or_default()
)
}
}
}
Command::Stop { mut ids } => {
if ids.is_empty() {
ids = inst
.local_resources
.read()
.await
.keys()
.cloned()
.collect::<Vec<_>>();
}
for id in ids {
if !inst.remove_local_resource(id.clone()).await {
bail!("service {id:?} not found.")
}
}
}
Command::Provide { path, id } => {
inst.add_local_resource(Box::new(FileSender {
info: ProvideInfo {
id: id.unwrap_or("file".to_owned()),
kind: "file".to_string(),
track_kind: None,
label: Some(path.file_name().unwrap().to_str().unwrap().to_string()),
size: Some(fs::metadata(&path).await?.size() as usize),
},
path: path.into(),
}))
.await;
}
Command::Download { id, path } => {
let (peer, _resource) = find_id(inst, id.clone(), "file").await?;
state
.write()
.await
.requested
.insert(id.clone(), Box::new(DownloadHandler { path }));
peer.request_resource(id).await;
}
Command::Expose { port, id } => {
inst.add_local_resource(Box::new(PortExposer {
port,
info: ProvideInfo {
kind: "port".to_string(),
id: id.unwrap_or(format!("p{port}")),
track_kind: None,
label: Some(format!("port {port}")),
size: None,
},
}))
.await;
}
Command::Forward { id, port } => {
let (peer, _resource) = find_id(inst, id.clone(), "port").await?;
let state = state.clone();
tokio::task::spawn(async move {
let Ok(listener) = TcpListener::bind(("127.0.0.1", port.unwrap_or(0))).await else {
error!("cannot bind tcp listener");
return;
};
info!("tcp listener bound to {}", listener.local_addr().unwrap());
while let Ok((stream, addr)) = listener.accept().await {
debug!("new connection from {addr:?}");
state.write().await.requested.insert(
id.clone(),
Box::new(ForwardHandler {
stream: Arc::new(RwLock::new(Some(stream))),
}),
);
peer.request_resource(id.clone()).await;
}
});
}
Command::Chat { message } => {
inst.send_relay(None, RelayMessage::Chat(ChatMesssage::Text(message)))
.await;
}
}
Ok(())
}
async fn find_id(
inst: &Arc<Instance>,
id: String,
kind: &str,
) -> anyhow::Result<(Arc<Peer>, ProvideInfo)> {
let peers = inst.peers.read().await;
for peer in peers.values() {
for (rid, r) in peer.remote_provided.read().await.iter() {
if rid == &id {
if r.kind == kind {
return Ok((peer.to_owned(), r.to_owned()));
} else {
bail!("wrong type: expected {kind:?}, found {:?}", r.kind)
}
}
}
}
bail!("id not found")
}
|
