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use log::warn;
use crate::{config::ManagerAddr, context::Context, net::ConnectOpts, relay::udprelay::MAXIMUM_UDP_PAYLOAD_SIZE};
use super::{
datagram::ManagerDatagram,
error::Error,
protocol::{
AddRequest,
AddResponse,
ListRequest,
ListResponse,
ManagerProtocol,
PingRequest,
PingResponse,
RemoveRequest,
RemoveResponse,
StatRequest,
},
};
pub struct ManagerClient {
socket: ManagerDatagram,
}
macro_rules! impl_command {
($command:ident, $req:ty, $rsp:ty) => {
pub async fn $command(&mut self, req: &$req) -> Result<$rsp, Error> {
self.request(req).await
}
};
}
impl ManagerClient {
impl_command!(add, AddRequest, AddResponse);
impl_command!(list, ListRequest, ListResponse);
impl_command!(ping, PingRequest, PingResponse);
impl_command!(remote, RemoveRequest, RemoveResponse);
pub async fn connect(
context: &Context,
bind_addr: &ManagerAddr,
connect_opts: &ConnectOpts,
) -> Result<ManagerClient, Error> {
ManagerDatagram::connect(context, bind_addr, connect_opts)
.await
.map(|socket| ManagerClient { socket })
.map_err(Into::into)
}
pub async fn stat(&mut self, req: &StatRequest) -> Result<(), Error> {
let buf = req.to_bytes()?;
let n = self.socket.send(&buf).await?;
if n != buf.len() {
warn!("manager send {} bytes != buffer {} bytes", n, buf.len());
}
Ok(())
}
async fn request<S, R>(&mut self, req: &S) -> Result<R, Error>
where
S: ManagerProtocol,
R: ManagerProtocol,
{
let buf = req.to_bytes()?;
let n = self.socket.send(&buf).await?;
if n != buf.len() {
warn!("manager send {} bytes != buffer {} bytes", n, buf.len());
}
let mut buf = [0u8; MAXIMUM_UDP_PAYLOAD_SIZE];
let n = self.socket.recv(&mut buf).await?;
R::from_bytes(&buf[..n]).map_err(Into::into)
}
}