start with mio tcp client

src/interface/udp_server.rs

@@ -0,0 +1,184 @@
+use std::net::{SocketAddr, UdpSocket};
+use std::sync::mpsc;
+
+use log::{info, warn};
+use satrs::pus::PusTmAsVec;
+use satrs::{
+    hal::std::udp_server::{ReceiveResult, UdpTcServer},
+    tmtc::CcsdsError,
+};
+
+pub trait UdpTmHandler {
+    fn send_tm_to_udp_client(&mut self, socket: &UdpSocket, recv_addr: &SocketAddr);
+}
+
+pub struct DynamicUdpTmHandler {
+    pub tm_rx: mpsc::Receiver<PusTmAsVec>,
+}
+
+impl UdpTmHandler for DynamicUdpTmHandler {
+    fn send_tm_to_udp_client(&mut self, socket: &UdpSocket, recv_addr: &SocketAddr) {
+        while let Ok(tm) = self.tm_rx.try_recv() {
+            if tm.packet.len() > 9 {
+                let service = tm.packet[7];
+                let subservice = tm.packet[8];
+                info!("Sending PUS TM[{service},{subservice}]")
+            } else {
+                info!("Sending PUS TM");
+            }
+            let result = socket.send_to(&tm.packet, recv_addr);
+            if let Err(e) = result {
+                warn!("Sending TM with UDP socket failed: {e}")
+            }
+        }
+    }
+}
+
+pub struct UdpTmtcServer<TmHandler: UdpTmHandler, SendError> {
+    pub udp_tc_server: UdpTcServer<CcsdsError<SendError>>,
+    pub tm_handler: TmHandler,
+}
+
+impl<TmHandler: UdpTmHandler, SendError: core::fmt::Debug + 'static>
+    UdpTmtcServer<TmHandler, SendError>
+{
+    pub fn periodic_operation(&mut self) {
+        while self.poll_tc_server() {}
+        if let Some(recv_addr) = self.udp_tc_server.last_sender() {
+            self.tm_handler
+                .send_tm_to_udp_client(&self.udp_tc_server.socket, &recv_addr);
+        }
+    }
+
+    fn poll_tc_server(&mut self) -> bool {
+        match self.udp_tc_server.try_recv_tc() {
+            Ok(_) => true,
+            Err(e) => match e {
+                ReceiveResult::ReceiverError(e) => match e {
+                    CcsdsError::ByteConversionError(e) => {
+                        warn!("packet error: {e:?}");
+                        true
+                    }
+                    CcsdsError::CustomError(e) => {
+                        warn!("mpsc custom error {e:?}");
+                        true
+                    }
+                },
+                ReceiveResult::IoError(e) => {
+                    warn!("IO error {e}");
+                    false
+                }
+                ReceiveResult::NothingReceived => false,
+            },
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::{
+        collections::VecDeque,
+        net::IpAddr,
+        sync::{Arc, Mutex},
+    };
+
+    use ops_sat_rs::config::{components, OBSW_SERVER_ADDR};
+    use satrs::{
+        spacepackets::{
+            ecss::{tc::PusTcCreator, WritablePusPacket},
+            SpHeader,
+        },
+        tmtc::ReceivesTcCore,
+    };
+
+    use super::*;
+
+    #[derive(Default, Debug, Clone)]
+    pub struct TestReceiver {
+        tc_vec: Arc<Mutex<VecDeque<Vec<u8>>>>,
+    }
+
+    impl ReceivesTcCore for TestReceiver {
+        type Error = CcsdsError<()>;
+        fn pass_tc(&mut self, tc_raw: &[u8]) -> Result<(), Self::Error> {
+            self.tc_vec.lock().unwrap().push_back(tc_raw.to_vec());
+            Ok(())
+        }
+    }
+
+    #[derive(Default, Debug, Clone)]
+    pub struct TestTmHandler {
+        addrs_to_send_to: Arc<Mutex<VecDeque<SocketAddr>>>,
+    }
+
+    impl UdpTmHandler for TestTmHandler {
+        fn send_tm_to_udp_client(&mut self, _socket: &UdpSocket, recv_addr: &SocketAddr) {
+            self.addrs_to_send_to.lock().unwrap().push_back(*recv_addr);
+        }
+    }
+
+    #[test]
+    fn test_basic() {
+        let sock_addr = SocketAddr::new(IpAddr::V4(OBSW_SERVER_ADDR), 0);
+        let test_receiver = TestReceiver::default();
+        let tc_queue = test_receiver.tc_vec.clone();
+        let udp_tc_server = UdpTcServer::new(sock_addr, 2048, Box::new(test_receiver)).unwrap();
+        let tm_handler = TestTmHandler::default();
+        let tm_handler_calls = tm_handler.addrs_to_send_to.clone();
+        let mut udp_dyn_server = UdpTmtcServer {
+            udp_tc_server,
+            tm_handler,
+        };
+        udp_dyn_server.periodic_operation();
+        assert!(tc_queue.lock().unwrap().is_empty());
+        assert!(tm_handler_calls.lock().unwrap().is_empty());
+    }
+
+    #[test]
+    fn test_transactions() {
+        let sock_addr = SocketAddr::new(IpAddr::V4(OBSW_SERVER_ADDR), 0);
+        let test_receiver = TestReceiver::default();
+        let tc_queue = test_receiver.tc_vec.clone();
+        let udp_tc_server = UdpTcServer::new(sock_addr, 2048, Box::new(test_receiver)).unwrap();
+        let server_addr = udp_tc_server.socket.local_addr().unwrap();
+        let tm_handler = TestTmHandler::default();
+        let tm_handler_calls = tm_handler.addrs_to_send_to.clone();
+        let mut udp_dyn_server = UdpTmtcServer {
+            udp_tc_server,
+            tm_handler,
+        };
+        let sph = SpHeader::new_for_unseg_tc(components::Apid::GenericPus as u16, 0, 0);
+        let ping_tc = PusTcCreator::new_simple(sph, 17, 1, &[], true)
+            .to_vec()
+            .unwrap();
+        let client = UdpSocket::bind("127.0.0.1:0").expect("Connecting to UDP server failed");
+        let client_addr = client.local_addr().unwrap();
+        client.connect(server_addr).unwrap();
+        client.send(&ping_tc).unwrap();
+        udp_dyn_server.periodic_operation();
+        {
+            let mut tc_queue = tc_queue.lock().unwrap();
+            assert!(!tc_queue.is_empty());
+            let received_tc = tc_queue.pop_front().unwrap();
+            assert_eq!(received_tc, ping_tc);
+        }
+
+        {
+            let mut tm_handler_calls = tm_handler_calls.lock().unwrap();
+            assert!(!tm_handler_calls.is_empty());
+            assert_eq!(tm_handler_calls.len(), 1);
+            let received_addr = tm_handler_calls.pop_front().unwrap();
+            assert_eq!(received_addr, client_addr);
+        }
+        udp_dyn_server.periodic_operation();
+        assert!(tc_queue.lock().unwrap().is_empty());
+        // Still tries to send to the same client.
+        {
+            let mut tm_handler_calls = tm_handler_calls.lock().unwrap();
+            assert!(!tm_handler_calls.is_empty());
+            assert_eq!(tm_handler_calls.len(), 1);
+            let received_addr = tm_handler_calls.pop_front().unwrap();
+            assert_eq!(received_addr, client_addr);
+        }
+    }
+}