src/config.rs

@@ -6,6 +6,8 @@ use satrs_mib::resultcode;
 use std::{collections::HashSet, net::Ipv4Addr};
 use strum::IntoEnumIterator;
 
+pub const STOP_FILE_NAME: &str = "stop-experiment";
+
 pub const OBSW_SERVER_ADDR: Ipv4Addr = Ipv4Addr::UNSPECIFIED;
 pub const SERVER_PORT: u16 = 7301;
 
@@ -124,4 +126,5 @@ pub mod tasks {
     pub const FREQ_MS_EVENT_HANDLING: u64 = 400;
     pub const FREQ_MS_AOCS: u64 = 500;
     pub const FREQ_MS_PUS_STACK: u64 = 200;
+    pub const FREQ_MS_CTRL: u64 = 400;
 }

src/interface/udp.rs

@@ -82,6 +82,7 @@ mod tests {
         sync::{Arc, Mutex},
     };
 
+    use ops_sat_rs::config::{components, OBSW_SERVER_ADDR};
     use satrs::{
         spacepackets::{
             ecss::{tc::PusTcCreator, WritablePusPacket},
@@ -89,7 +90,6 @@ mod tests {
         },
         tmtc::ReceivesTcCore,
     };
-    use ops_sat_rs::config::{components, OBSW_SERVER_ADDR};
 
     use super::*;
 

src/main.rs

@@ -1,15 +1,18 @@
 use std::{
     net::{IpAddr, SocketAddr},
-    sync::mpsc,
+    sync::{atomic::AtomicBool, mpsc, Arc},
     thread,
     time::Duration,
 };
 
 use log::info;
-use ops_sat_rs::config::tasks::FREQ_MS_PUS_STACK;
 use ops_sat_rs::config::{
     tasks::FREQ_MS_UDP_TMTC, OBSW_SERVER_ADDR, PACKET_ID_VALIDATOR, SERVER_PORT,
 };
+use ops_sat_rs::config::{
+    tasks::{FREQ_MS_CTRL, FREQ_MS_PUS_STACK},
+    STOP_FILE_NAME,
+};
 use satrs::{
     hal::std::{tcp_server::ServerConfig, udp_server::UdpTcServer},
     tmtc::CcsdsDistributor,
@@ -36,10 +39,11 @@ mod requests;
 mod tm_funnel;
 mod tmtc;
 
-#[allow(dead_code)]
 fn main() {
     setup_logger().expect("setting up logging with fern failed");
-    println!("OPS-SAT Rust experiment OBSW");
+    println!("OPS-SAT Rust Experiment OBSW");
+
+    let stop_signal = Arc::new(AtomicBool::new(false));
 
     let (tc_source_tx, tc_source_rx) = mpsc::channel();
     let (tm_funnel_tx, tm_funnel_rx) = mpsc::channel();
@@ -152,6 +156,23 @@ fn main() {
         })
         .unwrap();
 
+    let ctrl_stop_signal = stop_signal.clone();
+    let jh_ctrl_thread = thread::Builder::new()
+        .name("CTRL".to_string())
+        .spawn(move || loop {
+            // TODO: Check stop file status regularly. If it exists, set the stop signal.
+            if std::path::Path::new(STOP_FILE_NAME).exists() {
+                log::warn!(
+                    "Detected stop file name at {}. Initiating experiment shutdown",
+                    STOP_FILE_NAME
+                );
+                ctrl_stop_signal.store(true, std::sync::atomic::Ordering::Relaxed);
+            }
+            thread::sleep(Duration::from_millis(FREQ_MS_CTRL));
+        })
+        .unwrap();
+
+    let tcp_stop_signal = stop_signal.clone();
     info!("Starting TCP task");
     let jh_tcp = thread::Builder::new()
         .name("TCP".to_string())
@@ -159,27 +180,42 @@ fn main() {
             info!("Running TCP server on port {SERVER_PORT}");
             loop {
                 tcp_server.periodic_operation();
+                if tcp_stop_signal.load(std::sync::atomic::Ordering::Relaxed) {
+                    log::warn!("breaking0");
+                    break;
+                }
             }
         })
         .unwrap();
 
     info!("Starting TM funnel task");
+    let funnel_stop_signal = stop_signal.clone();
     let jh_tm_funnel = thread::Builder::new()
         .name("TM Funnel".to_string())
         .spawn(move || loop {
             tm_funnel.operation();
+            if funnel_stop_signal.load(std::sync::atomic::Ordering::Relaxed) {
+                break;
+            }
         })
         .unwrap();
 
     info!("Starting PUS handler thread");
+    let pus_stop_signal = stop_signal.clone();
     let jh_pus_handler = thread::Builder::new()
         .name("PUS".to_string())
         .spawn(move || loop {
             pus_stack.periodic_operation();
+            if pus_stop_signal.load(std::sync::atomic::Ordering::Relaxed) {
+                break;
+            }
             thread::sleep(Duration::from_millis(FREQ_MS_PUS_STACK));
         })
         .unwrap();
 
+    jh_ctrl_thread
+        .join()
+        .expect("Joining Controller thread failed");
     jh_udp_tmtc
         .join()
         .expect("Joining UDP TMTC server thread failed");

src/tm_funnel.rs

@@ -1,7 +1,5 @@
-use std::{
+use std::time::Instant;
-    collections::HashMap,
+use std::{collections::HashMap, sync::mpsc, time::Duration};
-    sync::mpsc::{self},
-};
 
 use log::info;
 use satrs::pus::PusTmAsVec;
@@ -76,6 +74,7 @@ impl TmFunnelCommon {
 
 pub struct TmFunnelDynamic {
     common: TmFunnelCommon,
+    last_ctrl_check: Instant,
     tm_funnel_rx: mpsc::Receiver<PusTmAsVec>,
     tm_server_tx: mpsc::Sender<PusTmAsVec>,
 }
@@ -90,20 +89,47 @@ impl TmFunnelDynamic {
             common: TmFunnelCommon::new(sync_tm_tcp_source),
             tm_funnel_rx,
             tm_server_tx,
+            last_ctrl_check: Instant::now(),
         }
     }
 
+    pub fn check_for_ctrl_check(&mut self) -> bool {
+        if Instant::now() - self.last_ctrl_check > Duration::from_millis(400) {
+            self.last_ctrl_check = Instant::now();
+            return true;
+        }
+        false
+    }
+
     pub fn operation(&mut self) {
-        if let Ok(mut tm) = self.tm_funnel_rx.recv() {
+        loop {
+            match self.tm_funnel_rx.recv_timeout(Duration::from_millis(100)) {
+                Ok(mut tm) => {
                     // Read the TM, set sequence counter and message counter, and finally update
                     // the CRC.
-            let zero_copy_writer = PusTmZeroCopyWriter::new(&mut tm.packet, MIN_CDS_FIELD_LEN)
+                    let zero_copy_writer =
+                        PusTmZeroCopyWriter::new(&mut tm.packet, MIN_CDS_FIELD_LEN)
                             .expect("Creating TM zero copy writer failed");
                     self.common.apply_packet_processing(zero_copy_writer);
                     self.common.sync_tm_tcp_source.add_tm(&tm.packet);
                     self.tm_server_tx
                         .send(tm)
                         .expect("Sending TM to server failed");
+                    if self.check_for_ctrl_check() {
+                        break;
+                    }
+                }
+                Err(e) => match e {
+                    mpsc::RecvTimeoutError::Timeout => {
+                        if self.check_for_ctrl_check() {
+                            break;
+                        }
+                    }
+                    mpsc::RecvTimeoutError::Disconnected => {
+                        log::warn!("All TM funnel senders have disconnected");
+                    }
+                },
+            }
         }
     }
 }