You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: listener.rs
    path of file: ./repos/ockam/implementations/rust/ockam/ockam_transport_udp/src/workers
    
    the code of the file until where you have to start completion: use super::TransportMessageCodec;
use crate::UDP;
use futures_util::stream::SplitStream;
use futures_util::StreamExt;
use ockam_core::{async_trait, route, Address, AllowAll, LocalMessage, Proces
    
    async fn process(&mut self, ctx: &mut Self::Context) -> Result<bool> {
        debug!("Waiting for incoming UDP datagram...");
        let (mut msg, addr) = match self.stream.next().await {
            Some(res) => match res {
                Ok((msg, addr)) => (LocalMessage::from_transport_message(msg), addr),
                Err(e) => {
                    warn!(
                        "Failed to read message, will wait for next message: {:?}",
                        e
                    );
                    return Ok(true);
                }
            },
            None => {
                debug!("No message read, will wait for next message.");
                return Ok(true);
            }
        };

        // Set return route to go directly to paired sender, skipping the UDP router
        let new_route = route![
            self.sender_addr.clone(),
            Address::new(UDP, addr.to_string()),
            msg.return_route(),
        ];
        msg = msg.set_return_route(new_route);

        debug!(onward_route = %msg.onward_route_ref(),
            return_route = %msg.return_route_ref(),
            "Forwarding UDP message");
        ctx.forward(msg).await?;

        Ok(true)
    }