server port is configurable now

src/config.rs

@@ -8,6 +8,7 @@ use std::net::Ipv4Addr;
 use std::path::{Path, PathBuf};
 
 pub const STOP_FILE_NAME: &str = "stop-experiment";
+pub const CONFIG_FILE_NAME: &str = "exp278.toml";
 pub const HOME_FOLER_EXPERIMENT: &str = "/home/exp278";
 pub const LOG_FOLDER: &str = "logs";
 
@@ -51,6 +52,80 @@ lazy_static! {
     };
 }
 
+pub mod cfg_file {
+    use std::{
+        fs::File,
+        io::Read,
+        path::{Path, PathBuf},
+    };
+
+    use super::{CONFIG_FILE_NAME, HOME_PATH, TCP_SPP_SERVER_PORT};
+
+    pub const SPP_CLIENT_PORT_CFG_KEY: &str = "tcp_spp_server_port";
+
+    #[derive(Debug)]
+    pub struct AppCfg {
+        pub tcp_spp_server_port: u16,
+    }
+
+    impl Default for AppCfg {
+        fn default() -> Self {
+            Self {
+                tcp_spp_server_port: TCP_SPP_SERVER_PORT,
+            }
+        }
+    }
+
+    pub fn create_app_config() -> AppCfg {
+        let mut cfg_path = HOME_PATH.clone();
+        cfg_path.push(CONFIG_FILE_NAME);
+        let cfg_path_home = cfg_path.as_path();
+        let relevant_path = if Path::new(CONFIG_FILE_NAME).exists() {
+            Some(PathBuf::from(Path::new(CONFIG_FILE_NAME)))
+        } else if cfg_path_home.exists() {
+            Some(PathBuf::from(cfg_path_home))
+        } else {
+            None
+        };
+
+        let mut app_cfg = AppCfg::default();
+        if relevant_path.is_none() {
+            log::warn!("No config file found, using default values");
+            return app_cfg;
+        }
+        let relevant_path = relevant_path.unwrap();
+        match File::open(relevant_path.as_path()) {
+            Ok(mut file) => {
+                let mut toml_str = String::new();
+                match file.read_to_string(&mut toml_str) {
+                    Ok(_size) => match toml_str.parse::<toml::Table>() {
+                        Ok(table) => {
+                            handle_config_file_table(table, &mut app_cfg);
+                        }
+                        Err(e) => log::error!("error parsing TOML config file: {e}"),
+                    },
+                    Err(e) => log::error!("error reading TOML config file: {e}"),
+                }
+            }
+            Err(e) => log::error!("error opening TOML config file: {e}"),
+        }
+        app_cfg
+    }
+
+    #[allow(clippy::collapsible_match)]
+    pub fn handle_config_file_table(table: toml::Table, app_cfg: &mut AppCfg) {
+        if let Some(value) = table.get(SPP_CLIENT_PORT_CFG_KEY) {
+            if let toml::Value::Integer(port) = value {
+                if *port < 0 {
+                    log::warn!("invalid port value, is negative");
+                } else {
+                    app_cfg.tcp_spp_server_port = *port as u16
+                }
+            }
+        }
+    }
+}
+
 pub mod tmtc_err {
     use super::*;
     use satrs::res_code::ResultU16;

src/interface/tcp_spp_client.rs

@@ -6,7 +6,7 @@ use std::time::Duration;
 use mio::net::TcpStream;
 use mio::{Events, Interest, Poll, Token};
 use ops_sat_rs::config::tasks::STOP_CHECK_FREQUENCY;
-use ops_sat_rs::config::{SPP_CLIENT_WIRETAPPING_RX, TCP_SPP_SERVER_PORT};
+use ops_sat_rs::config::SPP_CLIENT_WIRETAPPING_RX;
 use satrs::encoding::ccsds::parse_buffer_for_ccsds_space_packets;
 use satrs::queue::GenericSendError;
 use satrs::spacepackets::PacketId;
@@ -43,11 +43,11 @@ impl TcpSppClient {
         tc_source_tx: mpsc::Sender<PacketAsVec>,
         tm_tcp_client_rx: mpsc::Receiver<PacketAsVec>,
         valid_ids: &'static [PacketId],
+        port: u16,
     ) -> io::Result<Self> {
         let mut poll = Poll::new()?;
         let events = Events::with_capacity(128);
-        let server_addr =
-            SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 1, 1)), TCP_SPP_SERVER_PORT);
+        let server_addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::LOCALHOST), port);
         let client = Self::attempt_connection(&mut poll, &server_addr);
         if client.is_err() {
             log::warn!(

src/main.rs

@@ -7,6 +7,7 @@ use std::{
 
 use log::info;
 use ops_sat_rs::config::{
+    cfg_file::create_app_config,
     components::{CONTROLLER_ID, TCP_SERVER, TCP_SPP_CLIENT, UDP_SERVER},
     tasks::{FREQ_MS_CTRL, FREQ_MS_PUS_STACK},
     VALID_PACKET_ID_LIST,
@@ -42,6 +43,9 @@ fn main() {
     setup_logger().expect("setting up logging with fern failed");
     println!("OPS-SAT Rust Experiment OBSW");
 
+    let app_cfg = create_app_config();
+    println!("App Configuration: {:?}", app_cfg);
+
     let stop_signal = Arc::new(AtomicBool::new(false));
 
     let (tc_source_tx, tc_source_rx) = mpsc::channel();
@@ -169,6 +173,7 @@ fn main() {
         tc_source_tx,
         tm_tcp_client_rx,
         VALID_PACKET_ID_LIST,
+        app_cfg.tcp_spp_server_port,
     )
     .expect("creating TCP SPP client failed");