progress bar

Reviewed-on: #3

.gitignore

@@ -1 +1,2 @@
 /target
+target/

client-gui/src/gui_app.rs

@@ -1,65 +1,149 @@
 use client_network::{
-    MerkleNode, MerkleTree, NetworkCommand, NetworkEvent, NodeHash, filename_to_string,
+    ChunkNode, MerkleNode, MerkleTree, NetworkCommand, NetworkEvent, NodeHash,
-    node_hash_to_hex_string,
+    big_or_chunk_to_file, filename_to_string, generate_base_tree, node_hash_to_hex_string,
+    node_to_file, remove_null_bytes,
 };
 use crossbeam_channel::{Receiver, Sender};
 use egui::{
-    Align, Align2, Button, CentralPanel, CollapsingHeader, Context, Id, LayerId, Layout, Order,
+    Align, CentralPanel, CollapsingHeader, Color32, Context, CornerRadius, Frame, Layout,
-    Popup, ScrollArea, SidePanel, TopBottomPanel, Ui, ViewportCommand,
+    ProgressBar, Response, ScrollArea, SidePanel, Stroke, TopBottomPanel, Ui, Vec2,
+    ViewportCommand,
 };
-use std::collections::HashMap;
+use std::collections::HashSet;
+use std::{collections::HashMap, fmt::format, io::Seek};
+
+use std::fs::{File, OpenOptions, create_dir};
 
 enum ServerStatus {
     Loading,
     NotConnected,
     Connected,
+    ConnectedHandshake,
 }
 
 // --- Main Application Struct ---
 pub struct P2PClientApp {
+    remaining: std::time::Duration,  // temps restant
+    last_update: std::time::Instant, // pour calculer delta
+    timer_started: bool,
     // Communication channels
     network_cmd_tx: Sender<NetworkCommand>,
     network_event_rx: Receiver<NetworkEvent>,
 
     // GUI State
     status_message: String,
-    known_peers: Vec<String>,
+    known_peers: Vec<(String, bool)>,
+    loading_peers: Vec<String>,
     connect_address_input: String,
+    connected_address: String,
+    connect_name_input: String,
 
     // Key: Parent Directory Hash (String), Value: List of children FileNode
     loaded_fs: HashMap<String, MerkleTree>,
+    shared_tree: MerkleTree,
 
     // Current peer tree displayed
     active_peer: Option<String>,
 
     server_status: ServerStatus,
+
+    show_network_popup: bool, // gérer selon besoin
+
+    error_message: Option<(String, String)>, // Some(message) -> afficher, None -> rien
+    success_message: Option<(String, String)>, // Some(message) -> afficher, None -> rien
+    active_server: String,
+
+    current_downloading_file_map: MerkleTree,
+    remaining_chunks: HashSet<[u8; 32]>,
+
+    // total number of chunks expected for the current download (set when download starts)
+    current_total_chunks: Option<usize>,
+
+    // number of chunks received so far (count of removed remaining_chunks)
+    current_received_chunks: usize,
+
+    root_downloading_file: String,
 }
 
 impl P2PClientApp {
     pub fn new(cmd_tx: Sender<NetworkCommand>, event_rx: Receiver<NetworkEvent>) -> Self {
-        let (root_hash, tree_content) = MerkleNode::generate_base_tree();
+        //let (root_hash, tree_content) = MerkleNode::generate_base_tree();
 
         let mut loaded_fs = HashMap::new();
-        let tree = MerkleTree::new(tree_content, root_hash);
+        let mut current_downloading_file_map = MerkleTree::new(HashMap::new(), [0; 32]);
-        loaded_fs.insert("bob".to_string(), tree);
+        //let tree = MerkleTree::new(tree_content, root_hash);
+        //loaded_fs.insert("bob".to_string(), tree);
 
         Self {
+            remaining: std::time::Duration::from_secs(0),
+            timer_started: false,
+            last_update: std::time::Instant::now(),
             network_cmd_tx: cmd_tx,
             network_event_rx: event_rx,
             status_message: "Client Initialized. Awaiting network status...".to_string(),
-            known_peers: vec!["bob".to_string()],
+            known_peers: Vec::new(),
-            connect_address_input: "127.0.0.1:8080".to_string(),
+            loading_peers: Vec::new(),
+            connect_address_input: "https://jch.irif.fr:8443".to_string(),
+            connected_address: "".to_string(),
             loaded_fs,
             active_peer: None,
-            server_status: ServerStatus::Loading,
+            server_status: ServerStatus::NotConnected,
+            show_network_popup: false,
+            error_message: None,
+            success_message: None,
+            connect_name_input: "bob".to_string(),
+            active_server: "".to_string(),
+            shared_tree: generate_base_tree(),
+            current_downloading_file_map: current_downloading_file_map,
+            current_total_chunks: None,
+            current_received_chunks: 0,
+            root_downloading_file: "".to_string(),
+            remaining_chunks: HashSet::new(),
         }
     }
+    pub fn show_error(&mut self, msg: impl Into<String>, peer_username: impl Into<String>) {
+        self.error_message = Some((msg.into(), peer_username.into()));
+    }
+    pub fn show_success(&mut self, msg: impl Into<String>, peer_username: impl Into<String>) {
+        self.success_message = Some((msg.into(), peer_username.into()));
+    }
+    pub fn clear_error(&mut self) {
+        self.error_message = None;
+    }
+    pub fn clear_success(&mut self) {
+        self.success_message = None;
+    }
+
+    fn set_current_total_chunks(&mut self, len: Option<usize>) {
+        self.current_total_chunks = len
+    }
+
+    fn set_current_received_chunks(&mut self, arg: usize) {
+        self.current_received_chunks = arg
+    }
 }
 
 // --- eframe::App Trait Implementation ---
 
 impl eframe::App for P2PClientApp {
     fn update(&mut self, ctx: &Context, _frame: &mut eframe::Frame) {
+        if matches!(self.server_status, ServerStatus::Connected) && !self.timer_started {
+            self.remaining = std::time::Duration::from_secs(30 * 60);
+            self.last_update = std::time::Instant::now();
+            self.timer_started = true;
+        }
+
+        // in update (every frame)
+        let now = std::time::Instant::now();
+        let delta = now.saturating_duration_since(self.last_update);
+        self.last_update = now;
+
+        if matches!(self.server_status, ServerStatus::Connected)
+            && self.remaining > std::time::Duration::ZERO
+        {
+            self.remaining = self.remaining.saturating_sub(delta);
+        }
+
         // 1. Process incoming Network Events
         // We poll the channel and update the GUI state for every event received.
         while let Ok(event) = self.network_event_rx.try_recv() {
@@ -68,42 +152,220 @@ impl eframe::App for P2PClientApp {
                     todo!();
 
                     self.status_message = format!("✅ Peer connected: {}", addr);
-                    if !self.known_peers.contains(&addr) {
+                    if !self.known_peers.contains(&(addr, true)) {
-                        self.known_peers.push(addr);
+                        self.known_peers.push((addr, true));
+                    }
+                }
+                NetworkEvent::RootRequest(addr) => {
+                    let root = self.shared_tree.root;
+                    let _ = self
+                        .network_cmd_tx
+                        .send(NetworkCommand::SendRootReply(root.to_vec(), addr));
+                }
+                NetworkEvent::DatumRequest(node_hash, addr) => {
+                    let hash: NodeHash = node_hash.try_into().expect("incorrect size");
+                    let asked_datum = self.shared_tree.data.get(&hash);
+                    match asked_datum {
+                        Some(datum_found) => {
+                            let _ = self.network_cmd_tx.send(NetworkCommand::SendDatum(
+                                datum_found.clone(),
+                                node_hash,
+                                addr,
+                            ));
+                        }
+                        None => {
+                            let _ = self
+                                .network_cmd_tx
+                                .send(NetworkCommand::SendNoDatum(node_hash.to_vec(), addr));
+                        }
                     }
                 }
                 NetworkEvent::PeerListUpdated(peers) => {
-                    todo!();
+                    //todo!();
 
                     self.known_peers = peers;
                 }
-                NetworkEvent::FileTreeReceived(_peer_id, _) => {
-                    todo!();
 
-                    // self.loaded_tree_nodes.insert(_peer_id, tree);
+                NetworkEvent::FileTreeReceived(node_hash, merklenode, ip) => {
-                    self.status_message = "🔄 File tree updated successfully.".to_string();
+                    match &self.active_peer {
+                        Some(active_peer) => {
+                            if let Some(maptree) = self.loaded_fs.get_mut(active_peer) {
+                                maptree.data.insert(node_hash, merklenode.clone());
+                                match merklenode {
+                                    MerkleNode::Directory(d) => {
+                                        for entry in d.entries {
+                                            let _ = self.network_cmd_tx.send(
+                                                NetworkCommand::GetChildren(
+                                                    entry.content_hash,
+                                                    ip.clone(),
+                                                    false,
+                                                ),
+                                            );
+                                        }
+                                    }
+                                    MerkleNode::BigDirectory(bigd) => {
+                                        for entry in bigd.children_hashes {
+                                            let _ = self.network_cmd_tx.send(
+                                                NetworkCommand::GetChildren(
+                                                    entry,
+                                                    ip.clone(),
+                                                    false,
+                                                ),
+                                            );
+                                        }
+                                    }
+                                    _ => {}
+                                }
+                            }
+                        }
+                        None => {}
+                    }
                 }
                 NetworkEvent::FileTreeRootReceived(peer_id, root_hash) => {
-                    todo!();
+                    // todo!();
 
-                    // self.status_message = format!("🔄 Received Merkle Root from {}: {}", peer_id, &root_hash[..8]);
+                    /*self.status_message = format!(
-                    //
+                        "🔄 Received Merkle Root from {}: {}",
-                    //
+                        peer_id,
-                    // self.active_peer_id = Some(peer_id.clone());
+                        &root_hash[..8]
-                    //
+                    );*/
-                    //
+
-                    // // Request the content of the root directory immediately
+                    if let Ok(chunknode) = ChunkNode::new(Vec::new()) {
-                    // let _ = self.network_cmd_tx.send(NetworkCommand::RequestDirectoryContent(
+                        let data_map: HashMap<NodeHash, MerkleNode> = HashMap::new();
-                    //     peer_id,
+                        //data_map.insert(root_hash, MerkleNode::Chunk(chunknode));
-                    //     root_hash,
+                        println!("len root: {}", data_map.len());
-                    // ));
+                        println!("node hash: {:?}", root_hash.to_vec());
+                        let tree = MerkleTree {
+                            data: data_map,
+                            root: root_hash,
+                        };
+                        match &self.active_peer {
+                            Some(activepeer) => {
+                                self.loaded_fs.insert(activepeer.clone(), tree);
+                            }
+                            None => {}
+                        }
+
+                        println!("tree created");
+                    }
+
+                    //self.active_peer_id = Some(peer_id.clone());
+
+                    // Request the content of the root directory immediately
+                    /*let _ = self
+                    .network_cmd_tx
+                    .send(NetworkCommand::RequestDirectoryContent(peer_id, root_hash));*/
                 }
-                NetworkEvent::Connected() => {
+                NetworkEvent::Connected(ip) => {
                     self.server_status = ServerStatus::Connected;
+                    self.connected_address = ip.clone();
+                    let _ = self.network_cmd_tx.send(NetworkCommand::FetchPeerList(
+                        self.connected_address.clone(),
+                    ));
+                }
+                NetworkEvent::ConnectedHandshake() => {
+                    self.server_status = ServerStatus::ConnectedHandshake;
+                }
+                NetworkEvent::Disconnected() => {
+                    self.active_server = "".to_string();
+                    self.connected_address = "".to_string();
+                    self.known_peers.clear();
+                    self.server_status = ServerStatus::NotConnected;
+                }
+                NetworkEvent::Error(err, peer_username) => {
+                    self.loading_peers.retain(|s| s != peer_username.as_str());
+                    self.show_error(err, peer_username);
+                }
+                NetworkEvent::InitDownload(hash, ip, name) => {
+                    if let Some(addr) = &self.active_peer {
+                        if let Some(roottree) = self.loaded_fs.get(addr) {
+                            if let Some(root) = roottree.data.get(&hash) {
+                                self.root_downloading_file = name;
+                                let _ = self
+                                    .current_downloading_file_map
+                                    .data
+                                    .insert(hash, root.clone());
+                                let _ = self
+                                    .network_cmd_tx
+                                    .send(NetworkCommand::GetChildren(hash, ip, true));
+                            }
+                        }
+                    }
+                }
+                NetworkEvent::DataReceived(hash, merkle_node, ip) => {
+                    let _ = self
+                        .current_downloading_file_map
+                        .data
+                        .insert(hash, merkle_node.clone());
+
+                    println!("merkle:{}", merkle_node.get_type_byte());
+                    match merkle_node {
+                        MerkleNode::Big(bigfile) => {
+                            for entry in bigfile.children_hashes {
+                                println!("entry: {:?}", entry);
+                                let _ = self.network_cmd_tx.send(NetworkCommand::GetChildren(
+                                    entry,
+                                    ip.clone(),
+                                    true,
+                                ));
+                                self.remaining_chunks.insert(entry);
+                                self.set_current_total_chunks(Some(self.remaining_chunks.len()));
+                            }
+                            self.remaining_chunks.remove(&hash);
+                        }
+                        MerkleNode::Chunk(chunk) => {
+                            self.remaining_chunks.remove(&hash);
+                        }
+                        _ => {}
+                    }
+
+                    if let Some(total) = self.current_total_chunks {
+                        // recompute received (safer than incrementing)
+                        let received = total.saturating_sub(self.remaining_chunks.len());
+                        self.current_received_chunks = received;
+                    }
+
+                    if self.remaining_chunks.is_empty() {
+                        /*let file = OpenOptions::new()
+                            .append(true)
+                            .create(true)
+                            .open(self.root_downloading_file.clone());
+
+                        if let Some(current) = self
+                            .current_downloading_file_map
+                            .data
+                            .get(&self.current_downloading_file_map.root)
+                        {
+                            match file {
+                                Ok(mut fileok) => {
+                                    big_or_chunk_to_file(
+                                        &self.current_downloading_file_map,
+                                        current,
+                                        &mut fileok,
+                                    );
+                                }
+                                Err(e) => {
+                                    eprintln!("error creaation file: {}", e);
+                                }
+                            }
+                        }*/
+                        self.current_total_chunks = None;
+                        self.current_received_chunks = 0;
+                        println!("bigfile téléchargé");
+                    }
+                }
+                NetworkEvent::Success(msg, peer_username) => {
+                    self.loading_peers.retain(|s| s != peer_username.as_str());
+                    self.show_success(msg, peer_username);
+                }
+                NetworkEvent::HandshakeFailed() => {}
+                NetworkEvent::ServerHandshakeFailed(err) => {
+                    self.active_server = "".to_string();
+                    self.server_status = ServerStatus::NotConnected;
+                    let err_msg = format!("Failed to connect to the server: {}", err);
+                    self.show_error(err_msg, "");
+                    let res = self.network_cmd_tx.send(NetworkCommand::ResetServerPeer());
                 }
-                NetworkEvent::Disconnected() => todo!(),
-                NetworkEvent::Error() => todo!(),
-                NetworkEvent::DataReceived(_, merkle_node) => todo!(),
             }
         }
 
@@ -122,18 +384,46 @@ impl eframe::App for P2PClientApp {
                 });
 
                 ui.menu_button("Network", |ui| {
-                    ui.horizontal(|ui| {
+                    match self.server_status {
-                        ui.label("Server IP:");
+                        ServerStatus::Connected | ServerStatus::ConnectedHandshake => {
-                        ui.text_edit_singleline(&mut self.connect_address_input);
+                            let desired = egui::vec2(300.0, 0.0); // width 300, auto-height if 0
-                        if ui.button("Connect").clicked() {
+                            ui.set_min_size(desired);
-                            let addr = self.connect_address_input.clone();
+                            ui.vertical(|ui| {
-                            let _ = self
+                                if ui.button("Disconnect").clicked() {
-                                .network_cmd_tx
+                                    println!("Disconnecting...");
-                                .send(NetworkCommand::ConnectToServer(addr));
+                                    let _ = self.network_cmd_tx.send(NetworkCommand::Disconnect());
-                            self.server_status = ServerStatus::Loading;
+                                    self.server_status = ServerStatus::NotConnected;
-                            ui.close();
+                                    self.remaining = std::time::Duration::from_secs(0);
+                                    self.timer_started = false;
+                                    ui.close();
+                                }
+                            });
                         }
-                    });
+                        ServerStatus::NotConnected => {
+                            let desired = egui::vec2(0.0, 0.0); // width 300, auto-height if 0
+                            ui.set_min_size(desired);
+                            ui.vertical(|ui| {
+                                ui.horizontal(|ui| {
+                                    ui.label("Server IP:");
+                                    ui.text_edit_singleline(&mut self.connect_address_input);
+                                });
+                                ui.horizontal(|ui| {
+                                    ui.label("Name:");
+                                    ui.text_edit_singleline(&mut self.connect_name_input);
+                                });
+                                if ui.button("Connect").clicked() {
+                                    let addr = self.connect_address_input.clone();
+                                    let name = self.connect_name_input.clone();
+                                    let _ = self
+                                        .network_cmd_tx
+                                        .send(NetworkCommand::ConnectToServerPut(addr, name));
+                                    self.server_status = ServerStatus::Loading;
+                                    ui.close();
+                                }
+                            });
+                        }
+                        _ => {}
+                    }
                 });
             });
         });
@@ -141,18 +431,35 @@ impl eframe::App for P2PClientApp {
         TopBottomPanel::bottom("bottom_panel").show(ctx, |ui| {
             ui.horizontal(|ui| {
                 match self.server_status {
-                    ServerStatus::Loading => {
+                    ServerStatus::Loading => ui.spinner(),
-                        ui.spinner();
+                    ServerStatus::Connected => ui.label("Registered but no server peer chosen..."),
-                    }
+                    ServerStatus::NotConnected => ui.label("No connection.."),
-                    ServerStatus::Connected => {
+                    ServerStatus::ConnectedHandshake => ui.label("📡"),
-                        ui.label("📡");
+                };
-                    }
+
-                    ServerStatus::NotConnected => {
+                ui.add_space(8.0); // small gap
-                        ui.label("No connection..");
+
-                    }
+                // desired progress bar width
+                let bar_width = 220.0f32;
+                // push it to the right by adding space equal to remaining width minus bar width
+                let push = (ui.available_width() - bar_width).max(0.0);
+                ui.add_space(push);
+
+                if let Some(total) = self.current_total_chunks {
+                    let received = self.current_received_chunks;
+                    let frac = if total == 0 {
+                        1.0
+                    } else {
+                        received as f32 / total as f32
+                    };
+
+                    ui.add(
+                        ProgressBar::new(frac)
+                            .show_percentage()
+                            .animate(true)
+                            .desired_height(10.0),
+                    );
                 }
-                ui.add_space(ui.available_width() - 30.0);
-                ui.label("30:00");
             });
         });
 
@@ -164,8 +471,9 @@ impl eframe::App for P2PClientApp {
                     ui.heading("🌐 Known Peers");
                     ui.add_space(20.0);
                     if ui.button("🔄").clicked() {
+                        println!("addr:{}", self.connected_address.clone());
                         let res = self.network_cmd_tx.send(NetworkCommand::FetchPeerList(
-                            self.connect_address_input.clone(),
+                            self.connected_address.clone(),
                         ));
                         if let Some(error) = res.err() {
                             println!(
@@ -173,40 +481,234 @@ impl eframe::App for P2PClientApp {
                                 error.to_string()
                             );
                         }
-                    }
+                        if let Some(active_peer) = &self.active_peer {
-                });
+                            if let Some(tree) = self.loaded_fs.get(active_peer) {
-
+                                println!("{}", tree.data.len());
-                ui.separator();
-                ScrollArea::vertical().show(ui, |ui| {
-                    if self.known_peers.is_empty() {
-                        ui.add_space(10.0);
-                        ui.label("No active peers.");
-                    } else {
-                        for peer in &self.known_peers {
-                            let is_active =
-                                self.active_peer.as_ref().map_or(false, |id| id == peer); // if peer.id == self.active_peer_id
-
-                            if ui
-                                .selectable_label(is_active, format!("{}", peer))
-                                .clicked()
-                            {
-                                // switch to displaying this peer's tree
-                                self.active_peer = Some(peer.clone());
-                                // Request root content if not loaded
-                                if !self
-                                    .loaded_fs
-                                    .contains_key(self.active_peer.as_ref().unwrap())
-                                {
-                                    todo!();
-                                    // let _ = self.network_cmd_tx.send(NetworkCommand::RequestDirectoryContent(
-                                    //     peer.clone(),
-                                    //     peer.clone(),
-                                    // ));
-                                }
                             }
                         }
                     }
                 });
+
+                ui.separator();
+                ScrollArea::vertical()
+                    .auto_shrink([false; 2])
+                    .show(ui, |ui| {
+                        ui.style_mut().visuals.widgets.inactive.bg_fill =
+                            ui.style().visuals.widgets.inactive.bg_fill; // no-op to get mutable borrow
+                        if self.known_peers.is_empty() {
+                            ui.add_space(10.0);
+                            ui.label("No active peers.");
+                        } else {
+                            for peer in &self.known_peers {
+                                let is_active =
+                                    self.active_peer.as_ref().map_or(false, |id| id == &peer.0); // if peer.id == self.active_peer_id
+
+                                let selectable: Response;
+                                // if &self.active_server == &peer.0 {
+                                //     // Create a frame with green background and render the selectable inside it.
+                                //     // Adjust rounding, padding and stroke as desired.
+                                //     let frame = Frame {
+                                //         fill: Color32::DARK_BLUE,
+                                //         stroke: Stroke::default(),
+                                //         corner_radius: CornerRadius::from(0.5),
+                                //         ..Default::default()
+                                //     };
+                                //     let internal = frame.show(ui, |ui| {
+                                //         // horizontal row: label on the left, spinner on the right
+                                //         ui.horizontal(|ui| {
+                                //             // let selectable label take remaining space
+                                //             ui.with_layout(Layout::left_to_right(Align::Center), |ui| {
+                                //                 ui.add_space(0.0); // ensure layout established
+                                //                 return ui.selectable_label(
+                                //                     is_active,
+                                //                     format!("{}", peer.0),
+                                //                 );
+                                //             })
+                                //             .inner // return Response from the inner closure if your egui version does so
+                                //         })
+                                //     });
+                                //     selectable = internal.inner.inner;
+                                // } else {
+                                //     selectable = ui.selectable_label(is_active, format!("{}", peer.0));
+                                // }
+
+                                // place spinner to the right of the label
+                                ui.horizontal(|ui| {
+                                    // Use same width for the label widget as the selectable we already created:
+                                    // Recreate selectable inline so both label and spinner share the same row.
+                                    let resp = if &self.active_server == &peer.0 {
+                                        // draw with frame inline
+                                        let frame = Frame {
+                                            fill: Color32::DARK_BLUE,
+                                            stroke: Stroke::default(),
+                                            corner_radius: CornerRadius::from(0.5),
+                                            ..Default::default()
+                                        };
+                                        frame
+                                            .show(ui, |ui| {
+                                                ui.selectable_label(
+                                                    is_active,
+                                                    format!("{}", peer.0),
+                                                )
+                                            })
+                                            .inner
+                                    } else {
+                                        ui.selectable_label(is_active, format!("{}", peer.0))
+                                    };
+
+                                    ui.add_space(4.0); // small gap
+
+                                    if self.loading_peers.contains(&peer.0) {
+                                        // push spinner to right by expanding a spacer before it
+                                        ui.with_layout(
+                                            Layout::right_to_left(Align::Center),
+                                            |ui| {
+                                                ui.spinner();
+                                            },
+                                        );
+                                    }
+
+                                    // use resp (click handling etc.)
+                                    if resp.clicked() {
+                                        // switch to displaying this peer's tree
+                                        self.active_peer = Some(peer.0.clone());
+                                        // Request root content if not loaded
+                                        if !self
+                                            .loaded_fs
+                                            .contains_key(self.active_peer.as_ref().unwrap())
+                                        {
+                                            //todo!();
+                                            let _ =
+                                                self.network_cmd_tx.send(NetworkCommand::Discover(
+                                                    peer.0.clone(),
+                                                    "root".to_string(),
+                                                    self.connected_address.clone(),
+                                                ));
+                                        }
+                                    }
+                                    resp.context_menu(|ui| {
+                                    // ... action
+                                    match self.server_status {
+                                        ServerStatus::Connected => {
+                                            if ui
+                                                .button("Utiliser le peer en tant que serveur")
+                                                .clicked()
+                                            {
+                                                self.active_server = peer.0.to_string();
+                                                let res = self.network_cmd_tx.send(
+                                                    NetworkCommand::ServerHandshake(
+                                                        peer.0.to_string(),
+                                                        self.connected_address.clone(),
+                                                    ),
+                                                );
+                                            }
+                                        }
+                                        _ => {}
+                                    }
+                                    if ui.button("Send Ping").clicked() {
+                                        let res = self.network_cmd_tx.send(NetworkCommand::Ping(
+                                            peer.0.to_string(),
+                                            self.connected_address.clone(),
+                                        ));
+
+                                        self.loading_peers.push(peer.0.to_owned());
+                                    }
+                                    if ui.button("Send Nat Traversal Request").clicked() {
+                                        match self.network_cmd_tx.send(
+                                            NetworkCommand::NatTraversal(
+                                                peer.0.to_string(),
+                                                self.connected_address.clone(),
+                                            ),
+                                        ) {
+                                            Ok(_) => {
+                                                print!(
+                                                    "[+] successfully sent nat traversal request"
+                                                )
+                                            }
+                                            Err(_) => {
+                                                print!("[-] failed to send nat traversal request")
+                                            }
+                                        }
+                                    }
+                                    if ui.button("Infos").clicked() {
+                                        // action 3
+                                        ui.close();
+                                    }
+
+                                    // ... autres boutons
+                                });
+                                });
+
+                                // if self.loading_peers.contains(&peer.0) {
+                                //     ui.spinner();
+                                // }
+
+                                //if selectable.clicked() {
+                                // switch to displaying this peer's tree
+                                //self.active_peer = Some(peer.0.clone());
+                                //// Request root content if not loaded
+                                //if !self
+                                //    .loaded_fs
+                                //    .contains_key(self.active_peer.as_ref().unwrap())
+                                //{
+                                //    //todo!();
+                                //    let _ = self.network_cmd_tx.send(NetworkCommand::Discover(
+                                //        peer.0.clone(),
+                                //        "root".to_string(),
+                                //        self.connected_address.clone(),
+                                //    ));
+                                //}
+                                //}
+                                //selectable.context_menu(|ui| {
+                                //    // ... action
+                                //    match self.server_status {
+                                //        ServerStatus::Connected => {
+                                //            if ui
+                                //                .button("Utiliser le peer en tant que serveur")
+                                //                .clicked()
+                                //            {
+                                //                self.active_server = peer.0.to_string();
+                                //                let res = self.network_cmd_tx.send(
+                                //                    NetworkCommand::ServerHandshake(
+                                //                        peer.0.to_string(),
+                                //                        self.connected_address.clone(),
+                                //                    ),
+                                //                );
+                                //            }
+                                //        }
+                                //        _ => {}
+                                //    }
+                                //    if ui.button("Send Ping").clicked() {
+                                //        let res = self.network_cmd_tx.send(NetworkCommand::Ping(
+                                //            peer.0.to_string(),
+                                //            self.connected_address.clone(),
+                                //        ));
+
+                                //        self.loading_peers.push(peer.0.to_owned());
+                                //    }
+                                //    if ui.button("Send Nat Traversal Request").clicked() {
+                                //        match self.network_cmd_tx.send(NetworkCommand::NatTraversal(
+                                //            peer.0.to_string(),
+                                //            self.connected_address.clone(),
+                                //        )) {
+                                //            Ok(_) => {
+                                //                print!("[+] successfully sent nat traversal request")
+                                //            }
+                                //            Err(_) => {
+                                //                print!("[-] failed to send nat traversal request")
+                                //            }
+                                //        }
+                                //    }
+                                //    if ui.button("Infos").clicked() {
+                                //        // action 3
+                                //        ui.close();
+                                //    }
+
+                                //    // ... autres boutons
+                                //});
+                            }
+                        }
+                    });
             });
 
         CentralPanel::default().show(ctx, |ui| {
@@ -220,13 +722,17 @@ impl eframe::App for P2PClientApp {
             ui.separator();
 
             if let Some(active_peer) = &self.active_peer {
-                if let Some(tree) = self.loaded_fs.get(active_peer) {
+                if let Some(tree) = self.loaded_fs.clone().get(active_peer) {
                     ScrollArea::vertical().show(ui, |ui| {
                         // Start drawing the tree from the root hash
                         self.draw_file_tree(ui, tree);
                     });
                 } else {
-                    ui.label(format!("Loading root for peer: {}", active_peer));
+                    ui.horizontal(|ui| {
+                        ui.label(format!("Loading root for peer: {}", active_peer));
+                        ui.add_space(8.0);
+                        ui.spinner(); // or conditional: if is_loading { ui.spinner(); }
+                    });
                 }
             } else {
                 ui.label("Connect to a peer to view a file tree.");
@@ -238,6 +744,37 @@ impl eframe::App for P2PClientApp {
             // ui.label(format!("Status: {}", self.status_message));
         });
 
+        if let Some(msg) = &self.error_message {
+            let msg = msg.clone();
+            egui::Window::new("Error")
+                .collapsible(false)
+                .resizable(false)
+                .anchor(egui::Align2::CENTER_CENTER, [0.0, 0.0])
+                .show(ctx, |ui| {
+                    ui.label(&msg.1);
+                    ui.label(&msg.0);
+                    if ui.button("OK").clicked() {
+                        self.clear_error();
+                    }
+                });
+            ctx.request_repaint();
+        }
+        if let Some(msg) = &self.success_message {
+            let msg = msg.clone();
+            egui::Window::new("Success")
+                .collapsible(false)
+                .resizable(false)
+                .anchor(egui::Align2::CENTER_CENTER, [0.0, 0.0])
+                .show(ctx, |ui| {
+                    ui.label(&msg.1);
+                    ui.label(&msg.0);
+                    if ui.button("OK").clicked() {
+                        self.clear_success();
+                    }
+                });
+            ctx.request_repaint();
+        }
+
         ctx.request_repaint_after(std::time::Duration::from_millis(10));
     }
 }
@@ -245,7 +782,7 @@ impl eframe::App for P2PClientApp {
 // --- Helper for Drawing the Recursive File Tree ---
 
 impl P2PClientApp {
-    fn draw_file_tree(&self, ui: &mut Ui, tree: &MerkleTree) {
+    fn draw_file_tree(&mut self, ui: &mut Ui, tree: &MerkleTree) {
         assert!(self.active_peer.is_some());
         assert!(
             self.loaded_fs
@@ -262,7 +799,7 @@ impl P2PClientApp {
     }
 
     fn draw_file_node(
-        &self,
+        &mut self,
         ui: &mut Ui,
         to_draw: NodeHash,
         tree: &MerkleTree,
@@ -275,11 +812,12 @@ impl P2PClientApp {
         if let Some(current) = tree.data.get(&to_draw) {
             let name = {
                 if filename.is_some() {
-                    filename_to_string(filename.unwrap())
+                    String::from_utf8(filename.unwrap().to_vec()).expect("err")
                 } else {
                     node_hash_to_hex_string(&to_draw)
                 }
             };
+
             match current {
                 MerkleNode::Chunk(node) => {
                     if ui
@@ -287,11 +825,30 @@ impl P2PClientApp {
                         .on_hover_text("Click to request file chunks...")
                         .clicked()
                     {
-                        todo!();
+                        match create_dir("./Download/") {
+                            Ok(_) => println!("Directory created successfully!"),
+                            Err(e) => println!("Failed to create directory: {}", e),
+                        }
+
+                        let new_name = format!("./Download/{}", name);
+
+                        let sani = remove_null_bytes(&new_name);
+
+                        println!("sani:{}", sani);
+
+                        let mut file = OpenOptions::new()
+                            .append(true)
+                            .create(true)
+                            .open(sani)
+                            .unwrap();
+
+                        big_or_chunk_to_file(tree, &MerkleNode::Chunk(node.clone()), &mut file);
+
                         // if let Some(peer_id) = active_peer_id.clone() {
                         //     let _ = self.network_cmd_tx.send(NetworkCommand::RequestChunk(peer_id, entry_hash.clone()));
                         //     // self.status_message = format!("Requested file chunks for: {}...", &entry_hash[..8]);
                         // }
+                        //  todo!();
                     }
                 }
                 MerkleNode::Directory(node) => {
@@ -305,20 +862,29 @@ impl P2PClientApp {
                                     entry.content_hash,
                                     tree,
                                     depth + 1,
-                                    Some(entry.filename),
+                                    Some(entry.filename.try_into().expect("incorrect size")),
                                 );
                             }
                         });
                 }
                 MerkleNode::Big(node) => {
-                    CollapsingHeader::new(format!("📄 (B) {}", name))
+                    if ui
-                        .default_open(false)
+                        .selectable_label(false, format!("📄 (B) {}", name))
-                        .enabled(true)
+                        .on_hover_text("Click to request file chunks...")
-                        .show(ui, |ui| {
+                        .clicked()
-                            for child in &node.children_hashes {
+                    {
-                                self.draw_file_node(ui, child.clone(), tree, depth + 1, None);
+                        if let Some(name) = filename {
+                            if let Ok(nameb) = String::from_utf8(name.to_vec()) {
+                                if let Some(addr) = &self.active_peer {
+                                    let _ = self.network_cmd_tx.send(NetworkCommand::InitDownload(
+                                        to_draw,
+                                        addr.clone(),
+                                        nameb,
+                                    ));
+                                }
                             }
-                        });
+                        }
+                    }
                 }
                 MerkleNode::BigDirectory(node) => {
                     CollapsingHeader::new(format!("📁 (BD) {}", name))

client-gui/src/main.rs

@@ -1,5 +1,5 @@
 use crate::gui_app::P2PClientApp;
-use client_network::{NetworkCommand, NetworkEvent, start_p2p_executor};
+use client_network::{NetworkCommand, NetworkEvent, P2PSharedData, start_p2p_executor};
 
 mod gui_app;
 
@@ -11,7 +11,10 @@ async fn main() -> eframe::Result<()> {
 
     // 2. Start the P2P Network Executor in a separate Tokio task
     // The executor runs in the background of our main async runtime.
-    let _network_handle = start_p2p_executor(network_cmd_rx, network_event_tx);
+
+    let shared_data: Option<P2PSharedData> = None;
+
+    let _network_handle = start_p2p_executor(network_cmd_rx, network_event_tx, shared_data);
 
     // 3. Configure and Run the Eframe/Egui GUI
     let options = eframe::NativeOptions {
@@ -34,4 +37,6 @@ async fn main() -> eframe::Result<()> {
             Ok(Box::new(app))
         }),
     )
+
+    // Starts the protocol
 }

client-network/src/cryptographic_signature.rs

@@ -1,12 +1,18 @@
+use std::io::Read;
+
+use bytes::Bytes;
+use p256::EncodedPoint;
 use p256::ecdsa::{
     Signature, SigningKey, VerifyingKey,
     signature::{Signer, Verifier},
 };
 use rand_core::OsRng;
+use sha2::{Digest, Sha256};
 
 ///
 /// contains the ecdsa private key, the ecdsa public key and the username
 ///
+///
 pub struct CryptographicSignature {
     priv_key: SigningKey,
     pub pub_key: VerifyingKey,
@@ -34,22 +40,120 @@ impl CryptographicSignature {
 ///
 /// returns a string representing the pub_key as a String
 ///
-pub fn formatPubKey(crypto_pair: CryptographicSignature) -> String  {
+pub fn formatPubKey(crypto_pair: CryptographicSignature) -> String {
     let encoded_point = crypto_pair.pub_key.to_encoded_point(false);
     let pubkey_bytes = encoded_point.as_bytes();
     hex::encode(pubkey_bytes)
 }
 
-#[cfg(test)]
+pub async fn get_peer_key(username: &String) -> Result<VerifyingKey, reqwest::Error> {
-mod tests {
+    let client = reqwest::Client::new();
-    // Note this useful idiom: importing names from outer (for mod tests) scope.
+    let uri = format!("https://jch.irif.fr:8443/peers/{}/key", username);
-    use super::*;
+    let res = client.get(uri).send().await?;
+    if res.status().is_success() {
+        println!("Successfully retreived the peers key.");
+    } else {
+        eprintln!(
+            "Failed to get the peers key from the server. Status: {}",
+            res.status()
+        );
+    }
+    let body: Bytes = res.bytes().await?;
+    let slice: &[u8] = body.as_ref();
+    let body_bytes: &[u8; 64] = slice.try_into().expect("size error");
+    let received_key = convert_verifyingkey(body_bytes);
+    Ok(received_key)
+}
 
-    #[test]
+fn convert_verifyingkey(raw_xy: &[u8; 64]) -> VerifyingKey {
-    fn creating_cryptographic_signature() {
+    let mut sec1 = [0u8; 65];
-        let username = String::from("quoicoubeh");
+    sec1[0] = 0x04;
-        let crypto_pair = CryptographicSignature::new(username);
+    sec1[1..].copy_from_slice(raw_xy);
-        let formatted_pubkey =formatPubKey(crypto_pair);
+
-        println!("pubkey : {}",formatted_pubkey);
+    let ep = EncodedPoint::from_bytes(&sec1).expect("invalid point bytes");
+    let pk = VerifyingKey::from_encoded_point(&ep).expect("invalid encoded point");
+    VerifyingKey::from(pk)
+}
+
+pub fn verify_signature(pubkey: VerifyingKey, message: &Vec<u8>) -> bool {
+    let length_bytes: [u8; 2] = message[5..7].try_into().expect("Taille incorrecte");
+    let length = u16::from_be_bytes(length_bytes);
+    println!("message length: {}", length);
+    let msg_to_hash = &message[..length as usize + 7];
+    let signature_bytes = &message[length as usize + 7..length as usize + 7 + 64];
+    println!("conversion start");
+    let sig = match Signature::from_bytes(signature_bytes.try_into().expect("conversion error")) {
+        Ok(s) => s,
+        Err(_) => return false,
+    };
+    println!("conversion done");
+    match pubkey.verify(&msg_to_hash, &sig) {
+        Ok(()) => true,
+        Err(_) => false,
     }
 }
+
+///
+/// takes a serialized message and adds the signature using the private key
+///
+pub fn sign_message(crypto_pair: &CryptographicSignature, message: &Vec<u8>) -> Vec<u8> {
+    let length_bytes: [u8; 2] = message[5..7]
+        .try_into()
+        .expect("slice with incorrect length");
+    let msg_length = u16::from_be_bytes(length_bytes);
+    println!(
+        "message to serialize: {:?}",
+        &message[..7 + msg_length as usize]
+    );
+    let digest = Sha256::digest(&message[..7 + msg_length as usize]);
+    let signature = crypto_pair.priv_key.sign_prehash_recoverable(&digest);
+
+    let message_length = 7 + msg_length as usize + 64;
+    let mut signed_message = Vec::with_capacity(message_length);
+    println!("{}", message_length);
+    signed_message.extend_from_slice(&message[..7 + msg_length as usize]);
+    println!("signed_tmp:{:?}", signed_message);
+    match signature {
+        Ok(signature) => {
+            let r = signature.0.r();
+            let s = signature.0.s();
+
+            let r_bytes = r.to_bytes(); // Returns a GenericArray/bytes object
+            let s_bytes = s.to_bytes();
+            signed_message.extend_from_slice(&r_bytes[..32]);
+            signed_message.extend_from_slice(&s_bytes[..32]);
+            println!("signed:{:?}, len: {}", signed_message, signed_message.len());
+            signed_message
+        }
+        Err(e) => {
+            panic!("error");
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    /*
+    ///
+    /// creates a cryptographic signature
+    ///
+    #[test]
+    fn creating_cryptographic_signature() {
+        let username = String::from("gamixtreize");
+        let crypto_pair = CryptographicSignature::new(username);
+        let formatted_pubkey = formatPubKey(crypto_pair);
+        println!("pubkey : {}", formatted_pubkey);
+    }*/
+
+    /*#[test]
+    fn signing_message() {
+        let username = String::from("gamixtreize");
+        let crypto_pair = CryptographicSignature::new(username.clone());
+        let handshake = HandshakeMessage::hello(0, 12, username);
+        let ser = handshake.serialize();
+        let signed_message = sign_message(&crypto_pair, &ser);
+        println!("unsigned_message: {:?}", ser);
+        println!("signed_message: {:?}", signed_message);
+    }*/
+}

client-network/src/data.rs

@@ -1,17 +1,199 @@
 use rand::{Rng, rng};
+use sha2::{Digest, Sha256};
 use std::collections::HashMap;
 use std::hash::{DefaultHasher, Hash, Hasher};
 
+use std::fs::{File, OpenOptions, create_dir};
+use std::io::{self, Write};
+
+use std::env;
+
+use crate::data;
+
 // --- Constants ---
-const MAX_CHUNK_DATA_SIZE: usize = 1024;
+pub const MAX_CHUNK_DATA_SIZE: usize = 1024;
-const MAX_DIRECTORY_ENTRIES: usize = 16;
+pub const MAX_DIRECTORY_ENTRIES: usize = 16;
-const MAX_BIG_CHILDREN: usize = 32;
+pub const MAX_BIG_CHILDREN: usize = 32;
-const MIN_BIG_CHILDREN: usize = 2;
+pub const MIN_BIG_CHILDREN: usize = 2;
-const FILENAME_HASH_SIZE: usize = 32;
+pub const FILENAME_HASH_SIZE: usize = 32;
-const DIRECTORY_ENTRY_SIZE: usize = FILENAME_HASH_SIZE * 2; // 64 bytes
+pub const DIRECTORY_ENTRY_SIZE: usize = FILENAME_HASH_SIZE * 2; // 64 bytes
+
+pub type NodeHash = [u8; FILENAME_HASH_SIZE];
+
+pub fn node_hash_to_hex_string(hash: &NodeHash) -> String {
+    hash.iter().map(|b| format!("{:02x}", b)).collect()
+}
+
+#[repr(u8)]
+#[derive(Debug, Clone)]
+pub enum MerkleNode {
+    // up to 1024 bytes of raw data.
+    Chunk(ChunkNode) = 0,
+    // 0 to 16 directory entries.
+    Directory(DirectoryNode) = 1,
+    // list of 2 to 32 hashes pointing to Chunk or Big nodes.
+    Big(BigNode) = 2,
+    // list of 2 to 32 hashes pointing to Directory or BigDirectory nodes.
+    BigDirectory(BigDirectoryNode) = 3,
+}
+
+#[derive(Debug, Clone)]
+pub struct MerkleTree {
+    pub data: HashMap<NodeHash, MerkleNode>,
+    pub root: NodeHash,
+}
+
+impl MerkleTree {
+    pub fn new(data: HashMap<NodeHash, MerkleNode>, root: NodeHash) -> MerkleTree {
+        MerkleTree { data, root }
+    }
+    pub fn clear_data(&mut self) {
+        self.data.clear();
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct ChunkNode {
+    pub data: Vec<u8>,
+}
+impl ChunkNode {
+    pub fn new(data: Vec<u8>) -> Result<Self, String> {
+        if data.len() > MAX_CHUNK_DATA_SIZE {
+            return Err(format!("Chunk data exceeds {} bytes", data.len()));
+        }
+        Ok(ChunkNode { data })
+    }
+
+    pub fn new_random() -> Self {
+        let mut rng = rand::rng();
+
+        // Determine a random length between 1 and MAX_CHUNK_DATA_SIZE (inclusive).
+        // Using +1 ensures the range is up to 1024.
+        let random_len = rng.random_range(1..=MAX_CHUNK_DATA_SIZE);
+
+        // Initialize a vector with the random length
+        let mut data = vec![0u8; random_len];
+
+        // Fill the vector with random bytes
+        rng.fill(&mut data[..]);
+
+        // Since we generated the length based on MAX_CHUNK_DATA_SIZE,
+        // this is guaranteed to be valid and doesn't need to return a Result.
+        ChunkNode { data }
+    }
+}
+
+// Helper struct
+#[derive(Debug, Clone)]
+pub struct DirectoryEntry {
+    pub filename: [u8; FILENAME_HASH_SIZE],
+    pub content_hash: NodeHash,
+}
+
+pub fn filename_to_string(filename: [u8; FILENAME_HASH_SIZE]) -> String {
+    let end_index = filename
+        .iter()
+        .position(|&b| b == 0)
+        .unwrap_or(FILENAME_HASH_SIZE);
+    String::from_utf8_lossy(&filename[..end_index]).to_string()
+}
+
+#[derive(Debug, Clone)]
+pub struct DirectoryNode {
+    pub entries: Vec<DirectoryEntry>,
+}
+
+impl DirectoryNode {
+    pub fn new(entries: Vec<DirectoryEntry>) -> Result<Self, String> {
+        if entries.len() > MAX_DIRECTORY_ENTRIES {
+            return Err(format!("Directory exceeds {} bytes", entries.len()));
+        }
+        Ok(DirectoryNode { entries })
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct BigNode {
+    pub children_hashes: Vec<NodeHash>,
+}
+
+impl BigNode {
+    pub fn new(children_hashes: Vec<NodeHash>) -> Result<Self, String> {
+        let n = children_hashes.len();
+        if n < MIN_BIG_CHILDREN || n > MAX_BIG_CHILDREN {
+            return Err(format!(
+                "Big node must have between {} and {} children, found {}",
+                MIN_BIG_CHILDREN, MAX_BIG_CHILDREN, n
+            ));
+        }
+        Ok(BigNode { children_hashes })
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct BigDirectoryNode {
+    pub children_hashes: Vec<NodeHash>,
+    // pub children_hashes: Vec<DirectoryEntry>,
+}
+
+impl BigDirectoryNode {
+    pub fn new(children_hashes: Vec<NodeHash>) -> Result<Self, String> {
+        let n = children_hashes.len();
+        if n < MIN_BIG_CHILDREN || n > MAX_BIG_CHILDREN {
+            return Err(format!(
+                "BigDirectory node must have between {} and {} children, found {}",
+                MIN_BIG_CHILDREN, MAX_BIG_CHILDREN, n
+            ));
+        }
+        Ok(BigDirectoryNode { children_hashes })
+    }
+}
+
+impl MerkleNode {
+    pub fn get_type_byte(&self) -> u8 {
+        match self {
+            MerkleNode::Chunk(_) => 0,
+            MerkleNode::Directory(_) => 1,
+            MerkleNode::Big(_) => 2,
+            MerkleNode::BigDirectory(_) => 3,
+        }
+    }
+
+    pub fn serialize(&self) -> Vec<u8> {
+        let mut bytes = Vec::new();
+        bytes.push(self.get_type_byte());
+
+        match self {
+            MerkleNode::Chunk(node) => {
+                bytes.extend_from_slice(&node.data);
+            }
+            MerkleNode::Directory(node) => {
+                for entry in &node.entries {
+                    bytes.extend_from_slice(&entry.filename);
+                    bytes.extend_from_slice(&entry.content_hash);
+                }
+            }
+            MerkleNode::Big(node) => {
+                for hash in &node.children_hashes {
+                    bytes.extend_from_slice(hash);
+                }
+            }
+            MerkleNode::BigDirectory(node) => {
+                for hash in &node.children_hashes {
+                    bytes.extend_from_slice(hash);
+                }
+            }
+        }
+        bytes
+    }
+}
 
 fn hash(data: &[u8]) -> NodeHash {
-    let mut hasher = DefaultHasher::new();
+    let root_hash = Sha256::digest(&data);
+    println!("root hash: {:?}", root_hash);
+    let res: NodeHash = root_hash.try_into().expect("incorrect size");
+    res
+    /*let mut hasher = DefaultHasher::new();
     data.hash(&mut hasher);
     let hash_u64 = hasher.finish();
 
@@ -21,6 +203,7 @@ fn hash(data: &[u8]) -> NodeHash {
         hash_array[i] = (hash_u64 >> (i * 8)) as u8;
     }
     hash_array // The rest remains 0, satisfying the 32-byte requirement
+    */
 }
 
 fn generate_random_filename() -> [u8; FILENAME_HASH_SIZE] {
@@ -49,37 +232,6 @@ fn generate_random_filename() -> [u8; FILENAME_HASH_SIZE] {
     filename_bytes
 }
 
-pub type NodeHash = [u8; FILENAME_HASH_SIZE];
-
-pub fn node_hash_to_hex_string(hash: &NodeHash) -> String {
-    hash.iter().map(|b| format!("{:02x}", b)).collect()
-}
-
-#[repr(u8)]
-#[derive(Debug, Clone)]
-pub enum MerkleNode {
-    // up to 1024 bytes of raw data.
-    Chunk(ChunkNode) = 0,
-    // 0 to 16 directory entries.
-    Directory(DirectoryNode) = 1,
-    // list of 2 to 32 hashes pointing to Chunk or Big nodes.
-    Big(BigNode) = 3,
-    // list of 2 to 32 hashes pointing to Directory or BigDirectory nodes.
-    BigDirectory(BigDirectoryNode) = 4,
-}
-
-#[derive(Debug, Clone)]
-pub struct MerkleTree {
-    pub data: HashMap<NodeHash, MerkleNode>,
-    pub root: NodeHash,
-}
-
-impl MerkleTree {
-    pub fn new(data: HashMap<NodeHash, MerkleNode>, root: NodeHash) -> MerkleTree {
-        MerkleTree { data, root }
-    }
-}
-
 fn generate_random_file_node(
     storage: &mut HashMap<NodeHash, MerkleNode>,
 ) -> Result<NodeHash, String> {
@@ -174,200 +326,197 @@ fn generate_random_directory_node(
     }
 }
 
-#[derive(Debug, Clone)]
+pub fn generate_random_tree(
-pub struct ChunkNode {
+    max_depth: u32,
-    pub data: Vec<u8>,
+) -> Result<(NodeHash, HashMap<NodeHash, MerkleNode>), String> {
+    let mut storage = HashMap::new();
+
+    // Start tree generation from the root directory at depth 0
+    let root_hash = generate_random_directory_node(0, max_depth, &mut storage)?;
+
+    Ok((root_hash, storage))
 }
-impl ChunkNode {
+
-    pub fn new(data: Vec<u8>) -> Result<Self, String> {
+pub fn generate_base_tree() -> MerkleTree {
-        if data.len() > MAX_CHUNK_DATA_SIZE {
+    let mut res = HashMap::new();
-            return Err(format!("Chunk data exceeds {} bytes", data.len()));
+
+    let bob_content = "where is bob".to_string().into_bytes();
+    let alice_content = "alice".to_string().into_bytes();
+    let oscar_content = "oscar is the opponent".to_string().into_bytes();
+
+    let mut children_nodes = Vec::new();
+    for i in 0..10 {
+        let mut i_nodes = Vec::new();
+        for j in 0..10 {
+            let node1 = MerkleNode::Chunk(ChunkNode::new(bob_content.clone()).unwrap());
+            let hash = hash(&node1.serialize());
+            i_nodes.push(hash);
+            res.insert(hash, node1);
         }
-        Ok(ChunkNode { data })
+        let bignode = MerkleNode::Big(BigNode::new(i_nodes).unwrap());
+        let hashbig = hash(&bignode.serialize());
+        children_nodes.push(hashbig);
+        res.insert(hashbig, bignode);
     }
 
-    pub fn new_random() -> Self {
+    let bignode = MerkleNode::Big(BigNode::new(children_nodes).unwrap());
-        let mut rng = rand::rng();
+    let hashbig = hash(&bignode.serialize());
 
-        // Determine a random length between 1 and MAX_CHUNK_DATA_SIZE (inclusive).
+    let node1 = MerkleNode::Chunk(ChunkNode::new(bob_content).unwrap());
-        // Using +1 ensures the range is up to 1024.
+    let hash1 = hash(&node1.serialize());
-        let random_len = rng.random_range(1..=MAX_CHUNK_DATA_SIZE);
 
-        // Initialize a vector with the random length
+    let node2 = MerkleNode::Chunk(ChunkNode::new(alice_content).unwrap());
-        let mut data = vec![0u8; random_len];
+    let hash2 = hash(&node2.serialize());
 
-        // Fill the vector with random bytes
+    //res.insert(hash1, node1);
-        rng.fill(&mut data[..]);
+    //res.insert(hash2, node2);
+    res.insert(hashbig, bignode);
 
-        // Since we generated the length based on MAX_CHUNK_DATA_SIZE,
+    let node3 = MerkleNode::Chunk(ChunkNode::new(oscar_content).unwrap());
-        // this is guaranteed to be valid and doesn't need to return a Result.
+    let hash3 = hash(&node3.serialize());
-        ChunkNode { data }
-    }
-}
 
-// Helper struct
+    //res.insert(hash3, node3);
-#[derive(Debug, Clone)]
-pub struct DirectoryEntry {
-    pub filename: [u8; FILENAME_HASH_SIZE],
-    pub content_hash: NodeHash,
-}
 
-pub fn filename_to_string(filename: [u8; FILENAME_HASH_SIZE]) -> String {
+    let dir1 = MerkleNode::Directory(DirectoryNode {
-    let end_index = filename
+        entries: [DirectoryEntry {
-        .iter()
+            filename: generate_random_filename(),
-        .position(|&b| b == 0)
+            content_hash: hash3,
-        .unwrap_or(FILENAME_HASH_SIZE);
+        }]
-    String::from_utf8_lossy(&filename[..end_index]).to_string()
+        .to_vec(),
-}
+    });
+    let hash_dir1 = hash(&dir1.serialize());
 
-#[derive(Debug, Clone)]
+    //res.insert(hash_dir1, dir1);
-pub struct DirectoryNode {
-    pub entries: Vec<DirectoryEntry>,
-}
 
-impl DirectoryNode {
+    let root = MerkleNode::Directory(DirectoryNode {
-    pub fn new(entries: Vec<DirectoryEntry>) -> Result<Self, String> {
+        entries: [
-        if entries.len() > MAX_DIRECTORY_ENTRIES {
+            DirectoryEntry {
-            return Err(format!("Directory exceeds {} bytes", entries.len()));
-        }
-        Ok(DirectoryNode { entries })
-    }
-}
-
-#[derive(Debug, Clone)]
-pub struct BigNode {
-    pub children_hashes: Vec<NodeHash>,
-}
-
-impl BigNode {
-    pub fn new(children_hashes: Vec<NodeHash>) -> Result<Self, String> {
-        let n = children_hashes.len();
-        if n < MIN_BIG_CHILDREN || n > MAX_BIG_CHILDREN {
-            return Err(format!(
-                "Big node must have between {} and {} children, found {}",
-                MIN_BIG_CHILDREN, MAX_BIG_CHILDREN, n
-            ));
-        }
-        Ok(BigNode { children_hashes })
-    }
-}
-
-#[derive(Debug, Clone)]
-pub struct BigDirectoryNode {
-    pub children_hashes: Vec<NodeHash>,
-}
-
-impl BigDirectoryNode {
-    pub fn new(children_hashes: Vec<NodeHash>) -> Result<Self, String> {
-        let n = children_hashes.len();
-        if n < MIN_BIG_CHILDREN || n > MAX_BIG_CHILDREN {
-            return Err(format!(
-                "BigDirectory node must have between {} and {} children, found {}",
-                MIN_BIG_CHILDREN, MAX_BIG_CHILDREN, n
-            ));
-        }
-        Ok(BigDirectoryNode { children_hashes })
-    }
-}
-
-impl MerkleNode {
-    pub fn get_type_byte(&self) -> u8 {
-        match self {
-            MerkleNode::Chunk(_) => 0,
-            MerkleNode::Directory(_) => 1,
-            MerkleNode::Big(_) => 3,
-            MerkleNode::BigDirectory(_) => 4,
-        }
-    }
-
-    pub fn serialize(&self) -> Vec<u8> {
-        let mut bytes = Vec::new();
-        bytes.push(self.get_type_byte());
-
-        match self {
-            MerkleNode::Chunk(node) => {
-                bytes.extend_from_slice(&node.data);
-            }
-            MerkleNode::Directory(node) => {
-                for entry in &node.entries {
-                    bytes.extend_from_slice(&entry.filename);
-                    bytes.extend_from_slice(&entry.content_hash);
-                }
-            }
-            MerkleNode::Big(node) => {
-                for hash in &node.children_hashes {
-                    bytes.extend_from_slice(hash);
-                }
-            }
-            MerkleNode::BigDirectory(node) => {
-                for hash in &node.children_hashes {
-                    bytes.extend_from_slice(hash);
-                }
-            }
-        }
-        bytes
-    }
-
-    pub fn generate_random_tree(
-        max_depth: u32,
-    ) -> Result<(NodeHash, HashMap<NodeHash, MerkleNode>), String> {
-        let mut storage = HashMap::new();
-
-        // Start tree generation from the root directory at depth 0
-        let root_hash = generate_random_directory_node(0, max_depth, &mut storage)?;
-
-        Ok((root_hash, storage))
-    }
-
-    pub fn generate_base_tree() -> (NodeHash, HashMap<NodeHash, MerkleNode>) {
-        let mut res = HashMap::new();
-
-        let node1 = MerkleNode::Chunk(ChunkNode::new_random());
-        let hash1 = hash(&node1.serialize());
-
-        let node2 = MerkleNode::Chunk(ChunkNode::new_random());
-        let hash2 = hash(&node2.serialize());
-
-        res.insert(hash1, node1);
-        res.insert(hash2, node2);
-
-        let node3 = MerkleNode::Chunk(ChunkNode::new_random());
-        let hash3 = hash(&node3.serialize());
-
-        res.insert(hash3, node3);
-
-        let dir1 = MerkleNode::Directory(DirectoryNode {
-            entries: [DirectoryEntry {
                 filename: generate_random_filename(),
-                content_hash: hash3,
+                content_hash: hashbig,
-            }]
+            },
-            .to_vec(),
+            /*DirectoryEntry {
-        });
+                filename: generate_random_filename(),
-        let hash_dir1 = hash(&dir1.serialize());
+                content_hash: hash2,
+            },
+            DirectoryEntry {
+                filename: generate_random_filename(),
+                content_hash: hash_dir1,
+            },*/
+        ]
+        .to_vec(),
+    });
 
-        res.insert(hash_dir1, dir1);
+    let root_hash = Sha256::digest(&root.serialize());
+    println!("root hash: {:?}", root_hash);
+    res.insert(root_hash.try_into().expect("incorrect size"), root);
 
-        let root = MerkleNode::Directory(DirectoryNode {
+    MerkleTree::new(res, root_hash.try_into().expect("incorrect size"))
-            entries: [
+}
-                DirectoryEntry {
-                    filename: generate_random_filename(),
-                    content_hash: hash1,
-                },
-                DirectoryEntry {
-                    filename: generate_random_filename(),
-                    content_hash: hash2,
-                },
-                DirectoryEntry {
-                    filename: generate_random_filename(),
-                    content_hash: hash_dir1,
-                },
-            ]
-            .to_vec(),
-        });
 
-        let root_hash = hash(&root.serialize());
+pub fn node_to_file(tree: &MerkleTree, node: &MerkleNode, path: String, i: u8) {
-        res.insert(root_hash, root);
+    match node.clone() {
+        MerkleNode::Directory(dir) => {
+            if i != 0 {
+                let new_path = format!("{}/fold_{}", path.clone(), i);
+                match create_dir(new_path.clone()) {
+                    Ok(_) => println!("Directory created successfully!"),
+                    Err(e) => println!("Failed to create directory: {}", e),
+                }
+            }
+            for entry in dir.entries {
+                // creer un fichier pour chaque entry
+                if let Ok(filename_str) = String::from_utf8(entry.filename.to_vec()) {
+                    let new_name = format!("{}{}", path.clone(), remove_null_bytes(&filename_str));
 
-        (root_hash, res)
+                    println!("new_name: {}", new_name);
+                    let file = OpenOptions::new()
+                        .append(true)
+                        .create(true)
+                        .open(new_name.clone());
+                    match file {
+                        Ok(mut fileok) => {
+                            if let Some(current) = tree.data.get(&entry.content_hash) {
+                                big_or_chunk_to_file(&tree, &current, &mut fileok);
+                            }
+                        }
+                        Err(e) => {
+                            eprintln!("error creaation file: {}", e);
+                        }
+                    }
+                }
+            }
+        }
+        MerkleNode::BigDirectory(bigdir) => {
+            for entry in bigdir.children_hashes.iter() {
+                if let Some(current) = tree.data.get(entry) {
+                    node_to_file(tree, current, path.clone(), i + 1);
+                }
+            }
+        }
+        _ => {
+            eprintln!("invalid type of dir");
+        }
     }
 }
+
+pub fn remove_null_bytes(input: &str) -> String {
+    input.chars().filter(|&c| c != '\0').collect()
+}
+
+pub fn big_or_chunk_to_file(tree: &MerkleTree, node: &MerkleNode, file: &mut File) {
+    match node {
+        MerkleNode::Big(big) => {
+            for entry in big.children_hashes.iter() {
+                if let Some(current) = tree.data.get(entry) {
+                    big_or_chunk_to_file(tree, current, file);
+                }
+            }
+        }
+        MerkleNode::Chunk(chunk) => {
+            println!("wrote data");
+            let _ = file.write_all(&chunk.data);
+        }
+        _ => {
+            println!("invalid type of file");
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    ///
+    /// creates a cryptographic signature
+    ///
+    #[test]
+    fn test_saving_tree() {
+        if let Ok(current_dir) = env::current_dir() {
+            println!("Current working directory: {:?}", current_dir);
+        }
+
+        println!("--------- tree test starts ------------");
+
+        match create_dir("../Download/") {
+            Ok(_) => println!("Directory created successfully!"),
+            Err(e) => println!("Failed to create directory: {}", e),
+        }
+        let tree = generate_base_tree();
+
+        println!("--------- test tree created ------------");
+        if let Some(root_node) = tree.data.get(&tree.root) {
+            node_to_file(&tree, root_node, "../Download/".to_string(), 0);
+        }
+    }
+
+    /*#[test]
+    fn signing_message() {
+        let username = String::from("gamixtreize");
+        let crypto_pair = CryptographicSignature::new(username.clone());
+        let handshake = HandshakeMessage::hello(0, 12, username);
+        let ser = handshake.serialize();
+        let signed_message = sign_message(&crypto_pair, &ser);
+        println!("unsigned_message: {:?}", ser);
+        println!("signed_message: {:?}", signed_message);
+    }*/
+}

client-network/src/datum_generation.rs

@@ -0,0 +1,200 @@
+use crate::data::*;
+use rand::{Rng, rng};
+use std::collections::HashMap;
+use std::hash::{DefaultHasher, Hash, Hasher};
+
+fn hash(data: &[u8]) -> NodeHash {
+    let mut hasher = DefaultHasher::new();
+    data.hash(&mut hasher);
+    let hash_u64 = hasher.finish();
+
+    let mut hash_array = [0u8; FILENAME_HASH_SIZE];
+    // Simple way to spread a 64-bit hash across 32 bytes for a unique-ish ID
+    for i in 0..8 {
+        hash_array[i] = (hash_u64 >> (i * 8)) as u8;
+    }
+    hash_array // The rest remains 0, satisfying the 32-byte requirement
+}
+
+fn generate_random_filename() -> [u8; FILENAME_HASH_SIZE] {
+    let mut rng = rand::rng();
+    let mut filename_bytes = [0; FILENAME_HASH_SIZE];
+
+    // Generate a random length for the base name
+    let name_len = rng.random_range(5..21);
+
+    // Generate random alphanumeric characters
+    for i in 0..name_len {
+        let char_code = rng.random_range(97..123); // 'a' through 'z'
+        if i < FILENAME_HASH_SIZE {
+            filename_bytes[i] = char_code as u8;
+        }
+    }
+
+    // Append a common extension
+    let ext = if rng.random_bool(0.5) { ".txt" } else { ".dat" };
+    let ext_bytes = ext.as_bytes();
+    let start_index = name_len.min(FILENAME_HASH_SIZE - ext_bytes.len());
+    if start_index < FILENAME_HASH_SIZE {
+        filename_bytes[start_index..(start_index + ext_bytes.len())].copy_from_slice(ext_bytes);
+    }
+
+    filename_bytes
+}
+
+fn generate_random_file_node(
+    storage: &mut HashMap<NodeHash, MerkleNode>,
+) -> Result<NodeHash, String> {
+    let mut rng = rng();
+    let is_big = rng.random_bool(0.2); // 20% chance of being a big file
+
+    if !is_big {
+        // Generate a simple Chunk Node
+        let node = MerkleNode::Chunk(ChunkNode::new_random());
+        let hash = hash(&node.serialize());
+        storage.insert(hash, node);
+        Ok(hash)
+    } else {
+        // Generate a Big Node (a file composed of chunks)
+        let num_children = rng.random_range(MIN_BIG_CHILDREN..=MAX_BIG_CHILDREN.min(8)); // Limit complexity
+        let mut children_hashes = Vec::with_capacity(num_children);
+
+        for _ in 0..num_children {
+            // Children must be Chunk or Big; for simplicity, we only generate Chunk children here.
+            let chunk_node = MerkleNode::Chunk(ChunkNode::new_random());
+            let chunk_hash = hash(&chunk_node.serialize());
+            storage.insert(chunk_hash, chunk_node);
+            children_hashes.push(chunk_hash);
+        }
+
+        let node = MerkleNode::Big(BigNode::new(children_hashes)?);
+        let hash = hash(&node.serialize());
+        storage.insert(hash, node);
+        Ok(hash)
+    }
+}
+
+fn generate_random_directory_node(
+    depth: u32,
+    max_depth: u32,
+    storage: &mut HashMap<NodeHash, MerkleNode>,
+) -> Result<NodeHash, String> {
+    let mut rng = rng();
+    let current_depth = depth + 1;
+    let is_big_dir = rng.random_bool(0.3) && current_depth < max_depth;
+
+    if !is_big_dir || current_depth >= max_depth {
+        // Generate a simple Directory Node (leaf level directory)
+        let num_entries = rng.random_range(1..=MAX_DIRECTORY_ENTRIES.min(5)); // Limit directory size for testing
+        let mut entries = Vec::with_capacity(num_entries);
+
+        for _ in 0..num_entries {
+            if rng.random_bool(0.7) {
+                // 70% chance of creating a file (Chunk/Big)
+                let file_hash = generate_random_file_node(storage)?;
+                let entry = DirectoryEntry {
+                    filename: generate_random_filename(),
+                    content_hash: file_hash,
+                };
+                entries.push(entry);
+            } else if current_depth < max_depth {
+                // 30% chance of creating a subdirectory
+                let dir_hash = generate_random_directory_node(current_depth, max_depth, storage)?;
+
+                // Create a basic directory entry name
+                let mut filename_bytes = [0; 32];
+                let subdir_name = format!("dir_{}", current_depth);
+                filename_bytes[..subdir_name.len()].copy_from_slice(subdir_name.as_bytes());
+
+                let entry = DirectoryEntry {
+                    filename: filename_bytes,
+                    content_hash: dir_hash,
+                };
+                entries.push(entry);
+            }
+        }
+
+        let node = MerkleNode::Directory(DirectoryNode::new(entries)?);
+        let hash = hash(&node.serialize());
+        storage.insert(hash, node);
+        Ok(hash)
+    } else {
+        // Generate a BigDirectory Node (internal directory structure)
+        let num_children = rng.random_range(MIN_BIG_CHILDREN..=MAX_BIG_CHILDREN.min(4)); // Limit children count
+        let mut children = Vec::with_capacity(num_children);
+
+        for _ in 0..num_children {
+            // Children must be Directory or BigDirectory
+            let child_hash = generate_random_directory_node(current_depth, max_depth, storage)?;
+            children.push(child_hash);
+        }
+
+        let node = MerkleNode::BigDirectory(BigDirectoryNode::new(children)?);
+        let hash = hash(&node.serialize());
+        storage.insert(hash, node);
+        Ok(hash)
+    }
+}
+
+pub fn generate_random_tree(
+    max_depth: u32,
+) -> Result<(NodeHash, HashMap<NodeHash, MerkleNode>), String> {
+    let mut storage = HashMap::new();
+
+    // Start tree generation from the root directory at depth 0
+    let root_hash = generate_random_directory_node(0, max_depth, &mut storage)?;
+
+    Ok((root_hash, storage))
+}
+
+pub fn generate_base_tree() -> (NodeHash, HashMap<NodeHash, MerkleNode>) {
+    let mut res = HashMap::new();
+
+    let node1 = MerkleNode::Chunk(ChunkNode::new_random());
+    let hash1 = hash(&node1.serialize());
+
+    let node2 = MerkleNode::Chunk(ChunkNode::new_random());
+    let hash2 = hash(&node2.serialize());
+
+    res.insert(hash1, node1);
+    res.insert(hash2, node2);
+
+    let node3 = MerkleNode::Chunk(ChunkNode::new_random());
+    let hash3 = hash(&node3.serialize());
+
+    res.insert(hash3, node3);
+
+    let dir1 = MerkleNode::Directory(DirectoryNode {
+        entries: [DirectoryEntry {
+            filename: generate_random_filename(),
+            content_hash: hash3,
+        }]
+        .to_vec(),
+    });
+    let hash_dir1 = hash(&dir1.serialize());
+
+    res.insert(hash_dir1, dir1);
+
+    let root = MerkleNode::Directory(DirectoryNode {
+        entries: [
+            DirectoryEntry {
+                filename: generate_random_filename(),
+                content_hash: hash1,
+            },
+            DirectoryEntry {
+                filename: generate_random_filename(),
+                content_hash: hash2,
+            },
+            DirectoryEntry {
+                filename: generate_random_filename(),
+                content_hash: hash_dir1,
+            },
+        ]
+        .to_vec(),
+    });
+
+    let root_hash = hash(&root.serialize());
+    res.insert(root_hash, root);
+
+    (root_hash, res)
+}

client-network/src/datum_parsing.rs

@@ -0,0 +1,94 @@
+use crate::{BigDirectoryNode, DirectoryEntry, DirectoryNode, MerkleNode, MerkleTree, NodeHash};
+use sha2::{Digest, Sha256};
+
+const CHUNK: u8 = 0;
+const DIRECTORY: u8 = 1;
+const BIG: u8 = 2;
+const BIGDIRECTORY: u8 = 3;
+
+pub fn parse_received_datum(
+    recevied_datum: Vec<u8>,
+    datum_length: usize,
+) -> Option<([u8; 32], MerkleNode)> {
+    let hash_name: [u8; 32] = recevied_datum[..32].try_into().expect("error");
+    let value = &recevied_datum[32..recevied_datum.len()];
+    let value_slice = value.to_vec();
+    println!("valueslice: {:?}, {}", value_slice, value_slice.len());
+    let datum_type = value_slice[0];
+    match datum_type {
+        CHUNK => Some((
+            hash_name,
+            MerkleNode::Chunk(crate::ChunkNode { data: value_slice }),
+        )),
+        DIRECTORY => {
+            let mut dir_entries = Vec::new();
+            let mut offset = 1 as usize;
+            for i in 0..((value_slice.len() - 1) / 64) as u8 {
+                offset = (1 + 64 * i as usize) as usize;
+                println!("offset:{}, i:{}", offset, i);
+                let name = &value_slice[offset..offset + 32];
+                let mut hash = [0u8; 32];
+                hash.copy_from_slice(&value_slice[offset + 32..offset + 64]);
+                let dp_name = String::from_utf8(name.to_vec()).expect("err");
+                println!("name:{}", dp_name);
+
+                // envoyer un datum request
+                dir_entries.push(DirectoryEntry {
+                    filename: name.try_into().expect("incorrect size"),
+                    content_hash: hash,
+                });
+            }
+
+            let current = DirectoryNode::new(dir_entries);
+            match current {
+                Ok(current_node) => Some((hash_name, MerkleNode::Directory(current_node))),
+                Err(e) => {
+                    println!("{}", e);
+                    None
+                }
+            }
+        }
+        BIG => {
+            let mut bigdir_entries: Vec<NodeHash> = Vec::new();
+            let mut offset = 1 as usize;
+            for i in 0..((value_slice.len() - 1) / 32) as u8 {
+                offset = (1 + 32 * i as usize) as usize;
+                println!("offset:{}, i:{}", offset, i);
+                let hash = &value_slice[offset..offset + 32];
+
+                // envoyer un datum request
+                bigdir_entries.push(hash.try_into().expect("incorrect size"));
+            }
+
+            println!("its a BIG bro");
+            Some((
+                hash_name,
+                MerkleNode::Big(crate::BigNode {
+                    children_hashes: bigdir_entries,
+                }),
+            ))
+        }
+        BIGDIRECTORY => {
+            let mut bigdir_entries: Vec<NodeHash> = Vec::new();
+            let mut offset = 1 as usize;
+            for i in 0..((value_slice.len() - 1) / 32) as u8 {
+                offset = (1 + 32 * i as usize) as usize;
+                println!("offset:{}, i:{}", offset, i);
+                let hash = &value_slice[offset..offset + 32];
+
+                // envoyer un datum request
+                bigdir_entries.push(hash.try_into().expect("incorrect size"));
+            }
+
+            let current = BigDirectoryNode::new(bigdir_entries);
+            match current {
+                Ok(current_node) => Some((hash_name, MerkleNode::BigDirectory(current_node))),
+                Err(e) => {
+                    println!("{}", e);
+                    None
+                }
+            }
+        }
+        _ => None,
+    }
+}

client-network/src/fetchsocketaddresserror.rs

@@ -0,0 +1,26 @@
+use std::fmt;
+
+#[derive(Debug)]
+pub enum FetchSocketAddressError {
+    NoIPV4Address,
+    NoRegisteredAddresses,
+    NoResponseFromUser,
+    ClientError(String),
+}
+
+impl fmt::Display for FetchSocketAddressError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            FetchSocketAddressError::NoIPV4Address => write!(f, "No IPv4 Address registered."),
+            FetchSocketAddressError::NoRegisteredAddresses => {
+                write!(f, "No Registered Addresses found.")
+            }
+            FetchSocketAddressError::NoResponseFromUser => {
+                write!(f, "No Response from user after contact.")
+            }
+            FetchSocketAddressError::ClientError(error) => {
+                write!(f, "Client error : {}", error)
+            }
+        }
+    }
+}

client-network/src/lib.rs

@@ -1,35 +1,216 @@
-mod data;
-mod protocol;
 mod cryptographic_signature;
-mod registration;
+mod data;
+mod datum_generation;
+mod datum_parsing;
+mod fetchsocketaddresserror;
+mod message_handling;
+mod messages_channels;
 mod messages_structure;
+mod peers_refresh;
+mod registration;
+mod server_communication;
+mod threads_handling;
+mod timestamp;
+
+use crate::fetchsocketaddresserror::FetchSocketAddressError;
+use crate::messages_structure::ROOTREPLY;
+use crate::peers_refresh::*;
+use crate::timestamp::Timestamp;
+use crate::{
+    cryptographic_signature::CryptographicSignature,
+    message_handling::EventType,
+    messages_channels::{MultipleSenders, start_receving_thread, start_retry_thread},
+    messages_structure::{
+        DATUM, DATUMREQUEST, NATTRAVERSALREQUEST, NATTRAVERSALREQUEST2, NODATUM, PING, ROOTREQUEST,
+        construct_message,
+    },
+    peers_refresh::HandshakeHistory,
+    registration::{parse_addresses, perform_handshake, register_with_the_server},
+    server_communication::{generate_id, get_peer_list},
+    threads_handling::Worker,
+};
+use std::collections::HashSet;
+use std::{
+    io::Error,
+    net::{IpAddr, Ipv4Addr, UdpSocket},
+    time::Duration,
+};
+use std::{
+    net::SocketAddr,
+    sync::{Arc, Mutex},
+};
+
+pub struct P2PSharedData {
+    shared_socket: Arc<UdpSocket>,
+    shared_cryptopair: Arc<CryptographicSignature>,
+    shared_messageslist: Arc<Mutex<HashMap<i32, EventType>>>,
+    shared_messagesreceived: Arc<Mutex<HashMap<String, (EventType, Timestamp)>>>,
+    shared_senders: Arc<MultipleSenders>,
+    server_name: Arc<Mutex<String>>,
+    server_address: Arc<Mutex<String>>,
+    handshake_peers: Arc<HandshakeHistory>,
+    threads: Vec<Worker>,
+}
+
+use bytes::Bytes;
+use reqwest::Client;
+use tokio::time::sleep;
+
+impl P2PSharedData {
+    pub fn new(
+        username: String,
+        cmd_tx: crossbeam_channel::Sender<NetworkEvent>,
+    ) -> Result<P2PSharedData, Error> {
+        let messages_list = HashMap::<i32, EventType>::new();
+        let messagesrecv_list = HashMap::<String, (EventType, Timestamp)>::new();
+        let username = String::from(username);
+        let crypto_pair = CryptographicSignature::new(username);
+        let socket = UdpSocket::bind("0.0.0.0:0")?;
+        let shared_socket = Arc::new(socket);
+        let shared_cryptopair = Arc::new(crypto_pair);
+        let shared_messageslist = Arc::new(Mutex::new(messages_list));
+        let shared_messagesreceived = Arc::new(Mutex::new(messagesrecv_list));
+
+        let mut threads = Vec::new();
+
+        let senders = MultipleSenders::new(1, &shared_socket, cmd_tx, &mut threads);
+        let shared_senders = Arc::new(senders);
+        let server_name = Arc::new(Mutex::new("".to_string()));
+        let server_address = Arc::new(Mutex::new("".to_string()));
+        let handhsake_peers = Arc::new(HandshakeHistory::new());
+
+        Ok(P2PSharedData {
+            shared_socket: shared_socket,
+            shared_cryptopair: shared_cryptopair,
+            shared_messageslist: shared_messageslist,
+            shared_messagesreceived: shared_messagesreceived,
+            shared_senders: shared_senders,
+            server_name: server_name,
+            server_address: server_address,
+            handshake_peers: handhsake_peers,
+            threads,
+        })
+    }
+    pub fn socket(&self) -> Arc<UdpSocket> {
+        self.shared_socket.clone()
+    }
+
+    pub fn cryptopair(&self) -> Arc<CryptographicSignature> {
+        self.shared_cryptopair.clone()
+    }
+    pub fn messages_list(&self) -> Arc<Mutex<HashMap<i32, EventType>>> {
+        self.shared_messageslist.clone()
+    }
+    pub fn messages_received(&self) -> Arc<Mutex<HashMap<String, (EventType, Timestamp)>>> {
+        self.shared_messagesreceived.clone()
+    }
+    pub fn servername(&self) -> String {
+        let guard = {
+            let maybe_sn = self.server_name.lock().unwrap();
+            maybe_sn.clone()
+        };
+        guard.to_string()
+    }
+    pub fn serveraddress(&self) -> String {
+        let guard = {
+            let maybe_sn = self.server_address.lock().unwrap();
+            maybe_sn.clone()
+        };
+        guard.to_string()
+    }
+    pub fn set_servername(&self, new: String) {
+        let mut guard = self.server_name.lock().unwrap();
+        *guard = new
+    }
+    pub fn set_serveraddress(&self, new: String) {
+        let mut guard = self.server_address.lock().unwrap();
+        *guard = new
+    }
+    pub fn senders(&self) -> Arc<MultipleSenders> {
+        self.shared_senders.clone()
+    }
+    pub fn socket_ref(&self) -> &UdpSocket {
+        &*self.shared_socket
+    }
+    pub fn handshakes(&self) -> Arc<HandshakeHistory> {
+        self.handshake_peers.clone()
+    }
+    pub fn cryptopair_ref(&self) -> &CryptographicSignature {
+        &*self.shared_cryptopair
+    }
+
+    pub fn messages_list_ref(&self) -> &Mutex<HashMap<i32, EventType>> {
+        &*self.shared_messageslist
+    }
+
+    pub fn messages_received_ref(&self) -> &Mutex<HashMap<String, (EventType, Timestamp)>> {
+        &*self.shared_messagesreceived
+    }
+
+    pub fn senders_ref(&self) -> &MultipleSenders {
+        &*self.shared_senders
+    }
+
+    pub fn add_message(&self, id: i32, evt: EventType) {
+        let mut map = self.shared_messageslist.lock().unwrap();
+        map.insert(id, evt);
+    }
+    pub fn threads(&mut self) -> &mut Vec<Worker> {
+        &mut self.threads
+    }
+
+    pub fn close_threads(&mut self) {
+        for w in self.threads.drain(..) {
+            w.stop();
+        }
+    }
+}
 
 /// Messages sent to the Network thread by the GUI.
 pub enum NetworkCommand {
-    ConnectToServer(String), // ServerIP
+    ConnectToServerPut(String, String), // ServerIP
-    FetchPeerList(String),   // ServerIP
+    ServerHandshake(String, String),    // ServerName
+    FetchPeerList(String),              // ServerIP
     RegisterAsPeer(String),
-    Ping(),
+    Ping(String, String),
-    ConnectPeer(String),     // IP:PORT
+    NatTraversal(String, String),
-    RequestFileTree(String), // peer_id
+    ConnectPeer((String, bool)), // IP:PORT
+    RequestFileTree(String),     // peer_id
     RequestDirectoryContent(String, String),
     RequestChunk(String, String),
+    Disconnect(),
+    ResetServerPeer(),
+    Discover(String, String, String),
+    GetChildren([u8; 32], String, bool),
+    SendDatum(MerkleNode, [u8; 32], String),
+    SendNoDatum(Vec<u8>, String),
+    SendRootReply(Vec<u8>, String),
+    InitDownload([u8; 32], String, String),
     // ...
 }
 
 /// Messages sent to the GUI by the Network thread.
 pub enum NetworkEvent {
-    Connected(),
+    Connected(String),
+    ConnectedHandshake(),
     Disconnected(),
-    Error(),
+    Error(String, String),
+    Success(String, String),
     PeerConnected(String),
-    PeerListUpdated(Vec<String>),
+    PeerListUpdated(Vec<(String, bool)>),
-    FileTreeReceived(String, Vec<MerkleNode>), // peer_id, content
+    FileTreeReceived([u8; 32], MerkleNode, String), // peer_id, content
-    DataReceived(String, MerkleNode),
+    DataReceived([u8; 32], MerkleNode, String),
-    FileTreeRootReceived(String, String),
+    FileTreeRootReceived(String, NodeHash),
+    HandshakeFailed(),
+    ServerHandshakeFailed(String),
+    DatumRequest([u8; 32], String),
+    RootRequest(String),
+    InitDownload([u8; 32], String, String),
     // ...
 }
 
+use std::collections::HashMap;
+
 pub use crate::data::*;
 use crossbeam_channel::{Receiver, Sender};
 use sha2::{Digest, Sha256};
@@ -52,6 +233,7 @@ pub fn calculate_chunk_id(data: &[u8]) -> String {
 pub fn start_p2p_executor(
     cmd_rx: Receiver<NetworkCommand>,
     event_tx: Sender<NetworkEvent>,
+    mut shared_data: Option<P2PSharedData>,
 ) -> tokio::task::JoinHandle<()> {
     // Use tokio to spawn the asynchronous networking logic
     tokio::task::spawn(async move {
@@ -64,9 +246,154 @@ pub fn start_p2p_executor(
             // Check for commands from the GUI
             if let Ok(cmd) = cmd_rx.try_recv() {
                 match cmd {
-                    NetworkCommand::ConnectPeer(addr) => {
+                    NetworkCommand::InitDownload(hash, ip, name) => {
+                        if let Some(sd) = shared_data.as_ref() {
+                            if let Some(res) = sd.handshake_peers.get_peer_info_username(ip) {
+                                let _ = event_tx.send(NetworkEvent::InitDownload(
+                                    hash,
+                                    res.ip.to_string(),
+                                    name.to_string(),
+                                ));
+                            }
+                        }
+                    }
+                    NetworkCommand::SendRootReply(node_hash, addr) => {
+                        if let Some(sd) = shared_data.as_mut() {
+                            let mut payload = Vec::new();
+                            payload.extend_from_slice(&node_hash);
+                            let new_id = generate_id();
+                            let message =
+                                construct_message(ROOTREPLY, payload, new_id, sd.cryptopair_ref());
+
+                            match message {
+                                None => {}
+                                Some(resp_msg) => {
+                                    println!("msg_sent:{:?}", resp_msg);
+                                    sd.senders_ref().send_dispatch(
+                                        resp_msg,
+                                        addr.clone(),
+                                        false,
+                                        sd.messages_list(),
+                                    );
+                                }
+                            }
+                        }
+                    }
+                    NetworkCommand::SendNoDatum(node_hash, addr) => {
+                        if let Some(sd) = shared_data.as_mut() {
+                            let mut payload = Vec::new();
+                            payload.extend_from_slice(&node_hash);
+                            let new_id = generate_id();
+                            let message =
+                                construct_message(NODATUM, payload, new_id, sd.cryptopair_ref());
+
+                            match message {
+                                None => {}
+                                Some(resp_msg) => {
+                                    println!("msg_sent:{:?}", resp_msg);
+                                    sd.senders_ref().send_dispatch(
+                                        resp_msg,
+                                        addr.clone(),
+                                        false,
+                                        sd.messages_list(),
+                                    );
+                                }
+                            }
+                        }
+                    }
+                    NetworkCommand::SendDatum(merklennode, node_hash, addr) => {
+                        if let Some(sd) = shared_data.as_mut() {
+                            let mut payload = Vec::new();
+                            payload.extend_from_slice(&node_hash);
+                            payload.extend_from_slice(&merklennode.serialize());
+                            let new_id = generate_id();
+                            let message =
+                                construct_message(DATUM, payload, new_id, sd.cryptopair_ref());
+
+                            match message {
+                                None => {}
+                                Some(resp_msg) => {
+                                    println!("msg_sent:{:?}", resp_msg);
+                                    sd.senders_ref().send_dispatch(
+                                        resp_msg,
+                                        addr.clone(),
+                                        false,
+                                        sd.messages_list(),
+                                    );
+                                }
+                            }
+                        }
+                    }
+                    NetworkCommand::ServerHandshake(username, ip) => {
+                        println!("server handshake called");
+                        if let Some(sd) = shared_data.as_mut() {
+                            start_receving_thread(sd, event_tx.clone(), sd.handshakes());
+                            start_retry_thread(
+                                sd.senders(),
+                                4,
+                                sd.messages_list(),
+                                sd.threads().as_mut(),
+                            );
+                            update_handshake(
+                                sd.senders(),
+                                sd.cryptopair(),
+                                sd.messages_list(),
+                                sd.handshake_peers.get_username_peerinfo_map(),
+                            );
+                            let server_address = {
+                                match get_server_address(username.to_owned(), ip.to_owned()).await {
+                                    Some(addr) => addr.to_string(),
+                                    None => {
+                                        match event_tx.send(NetworkEvent::Error(
+                                            "Couldn't fetch server socket address.".to_owned(),
+                                            username.to_owned(),
+                                        )) {
+                                            Ok(_) => {}
+                                            Err(e) => {
+                                                println!("Network Event Error : {}", e.to_string());
+                                            }
+                                        }
+                                        "".to_owned()
+                                    }
+                                }
+                            };
+                            if server_address.to_owned().eq(&"".to_owned()) {
+                                continue;
+                            }
+
+                            sd.set_servername(username.to_owned());
+                            sd.set_serveraddress(server_address.to_string());
+                            println!("SET SERVERADDRESS");
+
+                            match perform_handshake(
+                                &sd,
+                                username.to_owned(),
+                                ip,
+                                event_tx.clone(),
+                                (true, server_address.to_string()),
+                            )
+                            .await
+                            {
+                                true => {
+                                    match event_tx.send(NetworkEvent::Success(
+                                        "Handshake established ✔️".to_string(),
+                                        username.to_owned(),
+                                    )) {
+                                        Ok(_) => {}
+                                        Err(err) => {
+                                            println!("Network Event Error : {}", err.to_string());
+                                        }
+                                    };
+                                }
+                                false => {}
+                            };
+                        } else {
+                            println!("no shared data");
+                        }
+                    }
+                    NetworkCommand::ConnectPeer((username, connected)) => {
                         println!("[Network] ConnectPeer() called");
-                        println!("[Network] Attempting to connect to: {}", addr);
+                        println!("[Network] Attempting to connect to: {}", username);
                         // Network logic to connect...
                         // If successful, send an event back:
                         // event_tx.send(NetworkEvent::PeerConnected(addr)).unwrap();
@@ -74,35 +401,314 @@ pub fn start_p2p_executor(
                     NetworkCommand::RequestFileTree(_) => {
                         println!("[Network] RequestFileTree() called");
                     }
+                    NetworkCommand::Discover(username, hash, ip) => {
+                        // envoie un handshake au peer, puis un root request
+                        if let Some(sd) = shared_data.as_ref() {
+                            let res = sd
+                                .handshake_peers
+                                .get_peer_info_username(username.to_owned());
+                            match res {
+                                Some(peerinfo) => {
+                                    let id = generate_id();
+                                    // envoyer un root request
+                                    let rootrequest = construct_message(
+                                        ROOTREQUEST,
+                                        Vec::new(),
+                                        id,
+                                        sd.cryptopair_ref(),
+                                    );
+                                    println!("matching");
+
+                                    match rootrequest {
+                                        None => {}
+                                        Some(resp_msg) => {
+                                            sd.add_message(id, EventType::RootRequest);
+                                            println!("msg_sent:{:?}", resp_msg);
+                                            sd.senders_ref().add_message_to_retry_queue(
+                                                resp_msg.clone(),
+                                                peerinfo.ip.to_string(),
+                                                false,
+                                            );
+
+                                            sd.senders_ref().send_dispatch(
+                                                resp_msg,
+                                                peerinfo.ip.to_string(),
+                                                false,
+                                                sd.messages_list(),
+                                            );
+                                        }
+                                    }
+                                }
+                                None => {
+                                    // envoyer un handshake
+                                    match perform_handshake(
+                                        &sd,
+                                        username.to_owned(),
+                                        ip,
+                                        event_tx.clone(),
+                                        (false, "".to_string()),
+                                    )
+                                    .await
+                                    {
+                                        true => {
+                                            match event_tx.send(NetworkEvent::Success(
+                                                "Handshake established ✔️".to_string(),
+                                                username.to_owned(),
+                                            )) {
+                                                Ok(_) => {}
+                                                Err(err) => {
+                                                    println!(
+                                                        "Network Event Error : {}",
+                                                        err.to_string()
+                                                    );
+                                                }
+                                            };
+                                        }
+                                        false => {}
+                                    }
+                                }
+                            }
+                        } else {
+                            println!("no shared data");
+                        }
+                    }
+                    NetworkCommand::GetChildren(hash, ip, is_file) => {
+                        if let Some(sd) = shared_data.as_ref() {
+                            let mut payload = Vec::new();
+                            payload.extend_from_slice(&hash);
+                            let new_id = generate_id();
+                            let datumreqest = construct_message(
+                                DATUMREQUEST,
+                                payload,
+                                new_id,
+                                sd.cryptopair_ref(),
+                            );
+                            match datumreqest {
+                                None => {}
+                                Some(resp_msg) => {
+                                    if is_file {
+                                        sd.add_message(new_id, EventType::DatumRequestBig);
+                                    } else {
+                                        sd.add_message(new_id, EventType::DatumRequest);
+                                    }
+                                    println!("msg_sent:{:?}", resp_msg);
+                                    sd.senders_ref().add_message_to_retry_queue(
+                                        resp_msg.clone(),
+                                        ip.clone(),
+                                        false,
+                                    );
+
+                                    sd.senders_ref().send_dispatch(
+                                        resp_msg,
+                                        ip.clone(),
+                                        false,
+                                        sd.messages_list(),
+                                    );
+                                }
+                            }
+                        }
+                    }
                     NetworkCommand::RequestDirectoryContent(_, _) => {
                         println!("[Network] RequestDirectoryContent() called");
                     }
                     NetworkCommand::RequestChunk(_, _) => {
                         println!("[Network] RequestChunk() called");
                     }
-                    NetworkCommand::ConnectToServer(ip) => {
+                    NetworkCommand::ConnectToServerPut(ip, name) => {
                         println!("[Network] ConnectToServer() called");
 
                         // Actual server connection
 
-                        tokio::time::sleep(std::time::Duration::from_millis(5000)).await;
+                        shared_data = match P2PSharedData::new(name.clone(), event_tx.clone()) {
+                            Ok(sd) => Some(sd),
+                            Err(e) => {
+                                let mut err_msg = String::from("failed to initialize socket: ");
+                                err_msg += &e.to_string();
+                                let res =
+                                    event_tx.send(NetworkEvent::Error(err_msg, name.to_owned()));
+                                let res = event_tx.send(NetworkEvent::Disconnected());
+                                None
+                            }
+                        };
 
-                        let res = event_tx.send(NetworkEvent::Connected());
+                        if let Some(sd) = shared_data.as_ref() {
+                            if let Err(e) = register_with_the_server(&sd.cryptopair(), &ip).await {
+                                let mut err_msg = String::from("request failed: ");
+                                err_msg += &e.to_string();
+                                let res =
+                                    event_tx.send(NetworkEvent::Error(err_msg, name.to_owned()));
+                                let res = event_tx.send(NetworkEvent::Disconnected());
+                            } else {
+                                let res = event_tx.send(NetworkEvent::Connected(ip));
+                                println!("username created: {}", sd.cryptopair().username);
+                            }
+                            //println!("ip: {}", ip);
+                        }
+
+                        //tokio::time::sleep(std::time::Duration::from_millis(5000)).await;
+
+                        /*let res = event_tx.send(NetworkEvent::Connected());
                         if let Some(error) = res.err() {
                             println!(
                                 "[Network] Couldn't send crossbeam message to GUI: {}",
                                 error.to_string()
                             );
-                        }
+                        }*/
                     }
                     NetworkCommand::FetchPeerList(ip) => {
                         println!("[Network] FetchPeerList() called");
+                        if ip == "" {
+                            let res = event_tx.send(NetworkEvent::Error(
+                                "Not registered to any server".to_string(),
+                                "".to_owned(),
+                            ));
+                        } else {
+                            println!("cc");
+                            match get_peer_list(ip).await {
+                                Ok(body) => match String::from_utf8(body.to_vec()) {
+                                    Ok(peers_list) => {
+                                        let mut peers: Vec<(String, bool)> = Vec::new();
+                                        let mut current = String::new();
+                                        for i in peers_list.chars() {
+                                            if i == '\n' {
+                                                peers.push((current.clone(), false));
+                                                current.clear();
+                                            } else {
+                                                current.push(i);
+                                            }
+                                        }
+                                        let res =
+                                            event_tx.send(NetworkEvent::PeerListUpdated(peers));
+                                    }
+                                    Err(e) => {
+                                        eprintln!("invalid UTF-8 in socket address bytes: {}", e);
+                                    }
+                                },
+                                Err(e) => println!("error"),
+                            }
+                        }
                     }
                     NetworkCommand::RegisterAsPeer(_) => {
                         println!("[Network] RegisterAsPeer() called");
                     }
-                    NetworkCommand::Ping() => {
+                    NetworkCommand::Ping(str, ip) => {
-                        println!("[Network] Ping() called");
+                        println!("[Network] Ping({}) called", str);
+                        if let Some(sd) = shared_data.as_ref() {
+                            let id = generate_id();
+                            sd.add_message(id, EventType::Ping);
+                            let pingrequest =
+                                construct_message(PING, Vec::new(), id, sd.cryptopair_ref());
+                            let peer_address =
+                                get_socket_address(str.to_owned(), ip, shared_data.as_ref()).await;
+                            match peer_address {
+                                Ok(addr) => {
+                                    //if let Some(ping) = pingrequest {
+                                    //    sd.senders_ref().add_message_to_retry_queue(
+                                    //        ping.clone(),
+                                    //        addr.to_string(),
+                                    //        false,
+                                    //    );
+                                    //    sd.senders_ref().send_dispatch(
+                                    //        ping,
+                                    //        addr.to_string(),
+                                    //        false,
+                                    //        sd.messages_list(),
+                                    //    );
+                                    //}
+                                    match event_tx.send(NetworkEvent::Success(
+                                        format!(
+                                            "Successfully sent ping message to {}.",
+                                            addr.to_string(),
+                                        ),
+                                        str.to_owned(),
+                                    )) {
+                                        Ok(_) => {}
+                                        Err(e) => {
+                                            eprintln!("NetworkEvent error : {}", e);
+                                        }
+                                    };
+                                }
+                                Err(err_msg) => {
+                                    match event_tx
+                                        .send(NetworkEvent::Error(err_msg.to_string(), str))
+                                    {
+                                        Ok(_) => {}
+                                        Err(e) => {
+                                            eprintln!("NetworkEvent error : {}", e);
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                    NetworkCommand::Disconnect() => {
+                        if let Some(sd) = shared_data.as_ref() {
+                            println!("Disconnecting: {}", &sd.cryptopair().username);
+                            shared_data = None;
+                            match event_tx.send(NetworkEvent::Disconnected()) {
+                                Ok(_) => {}
+                                Err(e) => {
+                                    eprintln!("NetworkEvent error : {}", e);
+                                }
+                            }
+                        } else {
+                            println!("no p2p data");
+                        }
+                    }
+                    NetworkCommand::ResetServerPeer() => {
+                        if let Some(sd) = shared_data.as_ref() {
+                            sd.set_servername("".to_string());
+                        } else {
+                            println!("no p2p data");
+                        }
+                    }
+                    NetworkCommand::NatTraversal(username, ip) => {
+                        if let Some(sd) = shared_data.as_ref() {
+                            println!("username:{}, ip:{}", username, ip);
+                            // user server to send nattraversal request
+                            let server_addr = sd.serveraddress();
+                            let peer_addr_query = get_socket_address(
+                                username.clone(),
+                                ip.clone(),
+                                shared_data.as_ref(),
+                            );
+
+                            match peer_addr_query.await {
+                                Ok(peer_addr) => {
+                                    let payload = socket_addr_to_vec(peer_addr);
+
+                                    print!("{:?}", payload.clone());
+
+                                    let id = generate_id();
+                                    let natreq = construct_message(
+                                        NATTRAVERSALREQUEST,
+                                        payload.clone(),
+                                        id.clone(),
+                                        &sd.cryptopair(),
+                                    );
+
+                                    sd.add_message(id, EventType::NatTraversal);
+                                    sd.senders_ref().send_dispatch(
+                                        natreq.expect(
+                                            "couldnt construct message nattraversalrequest2",
+                                        ),
+                                        server_addr.to_string(),
+                                        false,
+                                        sd.messages_list(),
+                                    );
+                                }
+                                Err(err_msg) => {
+                                    match event_tx
+                                        .send(NetworkEvent::Error(err_msg.to_string(), username))
+                                    {
+                                        Ok(_) => {}
+                                        Err(e) => {
+                                            eprintln!("NetworkEvent error : {}", e);
+                                        }
+                                    }
+                                }
+                            }
+                        }
                     }
                 }
             }
@@ -113,7 +719,190 @@ pub fn start_p2p_executor(
             // event_tx.send(NetworkEvent::PeerConnected("NewPeerID".to_string())).unwrap();
 
             // Avoid spinning too fast
-            tokio::time::sleep(std::time::Duration::from_millis(50)).await;
+            sleep(std::time::Duration::from_millis(50)).await;
         }
     })
 }
+
+fn socket_addr_to_vec(addr: SocketAddr) -> Vec<u8> {
+    let mut v = match addr.ip() {
+        IpAddr::V4(v4) => v4.octets().to_vec(),
+        IpAddr::V6(v6) => v6.octets().to_vec(),
+    };
+    v.extend(&addr.port().to_be_bytes());
+    v
+}
+
+fn parse_pack(s: &str) -> Option<[u8; 6]> {
+    // split into "ip" and "port"
+    let mut parts = s.rsplitn(2, ':');
+    let port_str = parts.next()?;
+    let ip_str = parts.next()?; // if missing, invalid
+
+    let ip: Ipv4Addr = ip_str.parse().ok()?;
+    let port: u16 = port_str.parse().ok()?;
+
+    let octets = ip.octets();
+    let port_be = port.to_be_bytes();
+    Some([
+        octets[0], octets[1], octets[2], octets[3], port_be[0], port_be[1],
+    ])
+}
+
+async fn quick_ping(addr: &SocketAddr, timeout_ms: u64, sd: &P2PSharedData) -> bool {
+    let id = generate_id();
+    let pingreq = construct_message(PING, Vec::new(), id, &sd.shared_cryptopair);
+
+    if let Some(ping) = pingreq {
+        sd.add_message(id, EventType::Ping);
+        sd.senders_ref()
+            .send_dispatch(ping, addr.to_string(), false, sd.messages_list());
+    }
+
+    sleep(Duration::from_millis(timeout_ms)).await;
+
+    let msg_list = sd.messages_list_ref().lock().expect("yooo");
+    let res = !msg_list.contains_key(&id);
+
+    for (id, evt) in msg_list.iter() {
+        println!("id : {}, evt : {}", id, evt.to_string());
+    }
+    println!("message list doesnt contain key? {}", res);
+
+    res
+}
+
+///
+/// sends a get request to the server to get the socket address of the given peer
+///
+
+pub async fn get_socket_address(
+    username: String,
+    ip: String,
+    shared_data: Option<&P2PSharedData>,
+) -> Result<SocketAddr, FetchSocketAddressError> {
+    let sd = shared_data.expect("No shared data");
+
+    let client = match Client::builder().timeout(Duration::from_secs(5)).build() {
+        Ok(c) => c,
+        Err(e) => {
+            return Err(FetchSocketAddressError::ClientError(e.to_string()));
+        }
+    };
+
+    let uri = format!("{}/peers/{}/addresses", ip, username);
+    let res = match client.get(&uri).send().await {
+        Ok(r) => r,
+        Err(e) => return Err(FetchSocketAddressError::ClientError(e.to_string())),
+    };
+
+    if res.status().is_success() {
+        println!("Successfully retrieved the addresses. {}", res.status());
+    } else {
+        eprintln!(
+            "Failed to get the peers addresses from the server. Status: {}",
+            res.status()
+        );
+    }
+
+    let body = match res.bytes().await {
+        Ok(b) => b,
+        Err(e) => {
+            return Err(FetchSocketAddressError::ClientError(e.to_string()));
+        }
+    };
+
+    let s = match String::from_utf8(body.to_vec()) {
+        Ok(st) => st,
+        Err(e) => {
+            return Err(FetchSocketAddressError::ClientError(e.to_string()));
+        }
+    };
+
+    let addresses: Vec<SocketAddr> = {
+        let temp = parse_addresses(&s);
+        temp.iter()
+            .filter_map(|a| match a {
+                SocketAddr::V4(_) => Some(*a),
+                SocketAddr::V6(_) => None,
+            })
+            .collect()
+    };
+
+    if addresses.is_empty() {
+        return Err(FetchSocketAddressError::NoRegisteredAddresses);
+    } else if !addresses.iter().any(|a| matches!(a, SocketAddr::V4(_))) {
+        return Err(FetchSocketAddressError::NoIPV4Address);
+    }
+
+    for addr in addresses {
+        println!("trying address : {}", addr);
+        if quick_ping(&addr, 5000, sd).await {
+            return Ok(addr);
+        }
+
+        let payload = socket_addr_to_vec(addr);
+        let id = generate_id();
+
+        let natreq = construct_message(NATTRAVERSALREQUEST, payload.clone(), id, &sd.cryptopair());
+
+        sd.add_message(id, EventType::NatTraversal);
+        sd.senders_ref().send_dispatch(
+            natreq.expect("couldnt construct message nattraversalrequest2"),
+            sd.serveraddress().to_string(),
+            false,
+            sd.messages_list(),
+        );
+
+        sleep(Duration::from_millis(5000)).await;
+
+        let maybe_entry = {
+            let guard = sd.messages_received_ref().lock().unwrap();
+            guard.clone()
+        }; // guard dropped
+
+        for (id, (evt, time)) in maybe_entry.iter() {
+            println!("{} : {} at {}", id, evt.to_string(), time.to_string());
+            if id.eq(&addr.to_string()) && Timestamp::now().diff(time) < 10 {
+                println!("received message from address, returning said address..");
+                return Ok(addr);
+            }
+        }
+
+        if quick_ping(&addr, 15000, sd).await {
+            return Ok(addr);
+        }
+    }
+
+    Err(FetchSocketAddressError::NoResponseFromUser)
+}
+
+pub async fn get_server_address(username: String, ip: String) -> Option<SocketAddr> {
+    let client = Client::builder()
+        .timeout(Duration::from_secs(5))
+        .build()
+        .expect("cannot create client");
+    let uri = format!("{}/peers/{}/addresses", ip, username);
+    let res = client.get(uri).send().await.expect("couldnt get response");
+    if res.status().is_success() {
+        println!("Successfully retreived the addresses. {}", res.status());
+    } else {
+        eprintln!(
+            "Failed to get the peers addresses from the server. Status: {}",
+            res.status()
+        );
+    }
+    let body: Bytes = res.bytes().await.expect("couldnt get bytes");
+
+    match String::from_utf8(body.to_vec()) {
+        Ok(s) => {
+            let addresses = parse_addresses(&s);
+            if let Some(first) = addresses.first() {
+                Some(first.clone())
+            } else {
+                None
+            }
+        }
+        Err(_) => None,
+    }
+}

client-network/src/message_handling.rs

@@ -0,0 +1,518 @@
+use crate::{
+    NetworkEvent, NodeHash,
+    cryptographic_signature::{CryptographicSignature, get_peer_key, verify_signature},
+    datum_parsing::parse_received_datum,
+    messages_channels::MultipleSenders,
+    messages_structure::construct_message,
+    peers_refresh::HandshakeHistory,
+    server_communication::generate_id,
+    timestamp::Timestamp,
+};
+use std::{
+    collections::HashMap,
+    default,
+    net::{Ipv4Addr, SocketAddr},
+};
+use std::{
+    net::IpAddr,
+    sync::{Arc, Mutex},
+};
+
+// Types of messages that await for a response
+#[derive(Debug, Clone)]
+pub enum EventType {
+    HelloThenRootRequest,
+    Hello,
+    RootRequest,
+    Ping,
+    NatTraversal,
+    DatumRequest,
+    DatumRequestBig,
+    Unknown,
+}
+
+impl EventType {
+    pub fn to_string(&self) -> String {
+        match self {
+            EventType::HelloThenRootRequest => "HelloThenRootRequest".to_owned(),
+            EventType::Hello => "Hello".to_owned(),
+            EventType::RootRequest => "RootRequest".to_owned(),
+            EventType::Ping => "Ping".to_owned(),
+            EventType::NatTraversal => "NatTraversal".to_owned(),
+            EventType::DatumRequest => "DatumRequest".to_owned(),
+            EventType::Unknown => "Unknown".to_owned(),
+            EventType::DatumRequestBig => "DatumRequestBig".to_owned(),
+        }
+    }
+
+    pub fn from_msgtype(msgtype: u8) -> EventType {
+        match msgtype {
+            PING => EventType::Ping,
+            HELLO => EventType::Hello,
+            ROOTREQUEST => EventType::RootRequest,
+            NATTRAVERSALREQUEST => EventType::NatTraversal,
+            DATUMREQUEST => EventType::DatumRequest,
+            _ => EventType::Unknown,
+        }
+    }
+}
+
+const ID: usize = 4;
+const TYPE: usize = 5;
+const LENGTH: usize = 7;
+const EXTENSIONS: usize = 4;
+const SIGNATURE: usize = 64;
+
+pub const PING: u8 = 0;
+const OK: u8 = 128;
+const ERROR: u8 = 129;
+const HELLO: u8 = 1;
+const HELLOREPLY: u8 = 130;
+const ROOTREQUEST: u8 = 2;
+const ROOTREPLY: u8 = 131;
+const DATUMREQUEST: u8 = 3;
+const NODATUM: u8 = 133;
+const DATUM: u8 = 132;
+const NATTRAVERSALREQUEST: u8 = 4;
+const NATTRAVERSALREQUEST2: u8 = 5;
+
+pub fn handle_recevied_message(
+    messages_list: &Arc<Mutex<HashMap<i32, EventType>>>,
+    messages_received: &Arc<Mutex<HashMap<String, (EventType, Timestamp)>>>,
+    recevied_message: &Vec<u8>,
+    crypto_pair: &CryptographicSignature,
+    //socket_addr: &SocketAddr,
+    senders: &MultipleSenders,
+    server_name: &String,
+    cmd_tx: crossbeam_channel::Sender<NetworkEvent>,
+    ip: SocketAddr,
+    handhsake_history: Arc<HandshakeHistory>,
+) {
+    if recevied_message.len() < 4 {
+        return;
+    } // Basic safety check
+
+    let message_id: [u8; 4] = recevied_message[0..4].try_into().expect("size error");
+    let id = i32::from_be_bytes(message_id);
+
+    let mut is_resp_to_server_handshake = false;
+
+    if recevied_message[4] == HELLO {
+        let length_bytes: [u8; 2] = recevied_message[TYPE..LENGTH]
+            .try_into()
+            .expect("Taille incorrecte");
+        let msg_length = u16::from_be_bytes(length_bytes) as usize;
+        let ilength = u16::from_be_bytes(length_bytes);
+        let received_name = &recevied_message[LENGTH + EXTENSIONS..LENGTH + ilength as usize];
+        let name = String::from_utf8(received_name.to_vec()).expect("wrong name");
+        if name.clone() == server_name.clone() {
+            is_resp_to_server_handshake = true;
+        }
+    }
+
+    let resp = parse_message(
+        recevied_message.to_vec(),
+        id,
+        crypto_pair,
+        cmd_tx,
+        ip,
+        messages_list,
+        messages_received,
+        handhsake_history,
+        senders,
+    );
+
+    match resp {
+        None => {}
+        Some(resp_msg) => {
+            println!("msg_sent:{:?}", resp_msg);
+            senders.send_dispatch(
+                resp_msg,
+                ip.to_string(),
+                is_resp_to_server_handshake,
+                messages_list.clone(),
+            );
+        }
+    }
+}
+
+pub fn parse_message(
+    received_message: Vec<u8>,
+    id: i32,
+    crypto_pair: &CryptographicSignature,
+    cmd_tx: crossbeam_channel::Sender<NetworkEvent>,
+    ip: SocketAddr,
+    messages_list: &Arc<Mutex<HashMap<i32, EventType>>>,
+    messages_received: &Arc<Mutex<HashMap<String, (EventType, Timestamp)>>>,
+    handhsake_history: Arc<HandshakeHistory>,
+    senders: &MultipleSenders,
+) -> Option<Vec<u8>> {
+    let cmd_tx_clone = cmd_tx.clone();
+
+    let id_bytes: [u8; 4] = received_message[0..ID]
+        .try_into()
+        .expect("Taille incorrecte");
+
+    let msgtype = received_message[ID];
+
+    messages_received
+        .lock()
+        .expect("couldnt lock received map")
+        .insert(
+            ip.to_string(),
+            (EventType::from_msgtype(msgtype), Timestamp::now()),
+        );
+
+    let length_bytes: [u8; 2] = received_message[TYPE..LENGTH]
+        .try_into()
+        .expect("Taille incorrecte");
+
+    let msg_length = u16::from_be_bytes(length_bytes) as usize;
+    // verify signature
+    match msgtype {
+        HELLO | HELLOREPLY => {
+            let ilength = u16::from_be_bytes(length_bytes);
+            println!("hello");
+            println!("name received length: {}", ilength);
+            let received_name = &received_message[LENGTH + EXTENSIONS..LENGTH + ilength as usize];
+            let received_username = String::from_utf8(received_name.to_vec());
+            match received_username {
+                Ok(username) => {
+                    let peer_pubkey =
+                        match handhsake_history.get_peer_info_username(username.clone()) {
+                            Some(peerinfo) => peerinfo.pubkey,
+                            _ => tokio::runtime::Runtime::new()
+                                .unwrap()
+                                .block_on(get_peer_key(&username))
+                                .expect("failed to retrieve public key"),
+                        };
+                    match msgtype {
+                        HELLOREPLY => {
+                            handhsake_history.add_new_handshake(peer_pubkey, "".to_string(), ip);
+                        }
+                        _ => {
+                            println!("no handshake added");
+                        }
+                    }
+                    if !verify_signature(peer_pubkey, &received_message) {
+                        println!(
+                            "incorrect signature from given peer: {}, ignoring message of type {} with id {}",
+                            &username, received_message[ID], id
+                        );
+                        return None;
+                    }
+                }
+                Err(e) => {
+                    println!("incorrect name: {}", e);
+                    return None;
+                }
+            }
+        }
+        ROOTREPLY | NODATUM | NATTRAVERSALREQUEST | NATTRAVERSALREQUEST2 => {
+            let ilength = u16::from_be_bytes(length_bytes);
+            println!("name received length: {}", ilength);
+            if let Some(peerinfo) = handhsake_history.get_peer_info_ip(ip.to_string()) {
+                if !verify_signature(peerinfo.pubkey, &received_message) {
+                    println!(
+                        "incorrect signature from given peer: {}, ignoring message of type {} with id {}",
+                        &peerinfo.username, received_message[ID], id
+                    );
+                    return None;
+                } else {
+                    println!("signature verified");
+                }
+            }
+        }
+
+        _ => {}
+    }
+
+    // Message handling
+    let mut constructed_message: Option<Vec<u8>> = None;
+    match msgtype {
+        PING => {
+            constructed_message = construct_message(OK, Vec::new(), id, crypto_pair);
+        }
+
+        OK => {
+            let mut guard = messages_list.lock().unwrap();
+            let res = guard.get(&id);
+            match res {
+                Some(ev) => {
+                    println!("{:?}", ev);
+                    let _ = &guard.remove_entry(&id);
+                    println!("message {} retiré de la liste", id);
+                }
+                None => {
+                    println!("ping non trouvé");
+                }
+            }
+        }
+
+        NATTRAVERSALREQUEST => {
+            // send ok & send nattraversalrequest2 to peer
+            constructed_message = construct_message(OK, Vec::new(), id, crypto_pair);
+
+            let ilength = u16::from_be_bytes(length_bytes);
+            let received_address =
+                &received_message[LENGTH + EXTENSIONS..LENGTH + ilength as usize];
+            let address = String::from_utf8(received_address.to_vec()).expect("wrong name");
+
+            let natreq2 = construct_message(
+                NATTRAVERSALREQUEST2,
+                ip.to_string().into_bytes(),
+                id,
+                crypto_pair,
+            );
+
+            senders.send_dispatch(
+                natreq2.expect("couldnt construct message nattraversalrequest2"),
+                address,
+                false,
+                messages_list.clone(),
+            );
+        }
+
+        NATTRAVERSALREQUEST2 => {
+            // send ok & send ping to peer
+            constructed_message = construct_message(OK, Vec::new(), id, crypto_pair);
+
+            let ilength = u16::from_be_bytes(length_bytes);
+            let received_address = &received_message[LENGTH..LENGTH + ilength as usize];
+            println!("received_address:{:?}", received_message);
+            //let addressv4 = IpAddr::V4(Ipv4Addr::from_octets(
+            //    received_address[0..4].try_into().expect("incorrect size"),
+            //));
+            let bytes: [u8; 4] = received_address[0..4].try_into().expect("incorrect size");
+            let addr_v4 = Ipv4Addr::from(bytes);
+            let addressv4 = IpAddr::V4(addr_v4);
+
+            let address = SocketAddr::new(
+                addressv4,
+                u16::from_be_bytes(received_address[4..6].try_into().expect("incorrect size")),
+            );
+
+            println!("ip: {}", address);
+
+            let pingreq = construct_message(PING, Vec::new(), id, crypto_pair);
+
+            senders.send_dispatch(
+                constructed_message.expect("couldnt construct message ping request"),
+                ip.to_string(),
+                false,
+                messages_list.clone(),
+            );
+
+            senders.send_dispatch(
+                pingreq.expect("couldnt construct message ping request"),
+                address.to_string(),
+                false,
+                messages_list.clone(),
+            );
+            constructed_message = None;
+        }
+
+        ERROR => {
+            if let Ok(err_received) =
+                String::from_utf8(received_message[LENGTH..(msg_length + LENGTH)].to_vec())
+            {
+                let err_msg = format!("Error received from peer {} : {}", ip, err_received);
+                let _ = cmd_tx_clone.send(NetworkEvent::Error(err_msg, "".to_owned()));
+            } else {
+                let err_msg = format!("Error received from peer {} : N/A", ip,);
+                let _ = cmd_tx_clone.send(NetworkEvent::Error(err_msg, "".to_owned()));
+            }
+        }
+
+        HELLO => {
+            let mut payload = Vec::new();
+
+            let received_length = u16::from_be_bytes(
+                received_message[TYPE..LENGTH]
+                    .try_into()
+                    .expect("incorrect size"),
+            );
+            let received_username =
+                &received_message[LENGTH + EXTENSIONS..LENGTH + received_length as usize];
+            handhsake_history.update_peer_info(
+                ip.to_string(),
+                String::from_utf8(received_username.to_vec()).expect("invalid conversion"),
+            );
+
+            payload.extend_from_slice(&0u32.to_be_bytes());
+            payload.extend_from_slice(&crypto_pair.username.clone().as_bytes());
+
+            let helloreply = construct_message(HELLOREPLY, payload, id, crypto_pair);
+
+            return helloreply;
+        }
+
+        HELLOREPLY => {
+            // ajoute l'username a la liste des peers handshake
+            let received_length = u16::from_be_bytes(
+                received_message[TYPE..LENGTH]
+                    .try_into()
+                    .expect("incorrect size"),
+            );
+            let received_username =
+                &received_message[LENGTH + EXTENSIONS..LENGTH + received_length as usize];
+            handhsake_history.update_peer_info(
+                ip.to_string(),
+                String::from_utf8(received_username.to_vec()).expect("invalid conversion"),
+            );
+            // verifie s'il faut renvoyer un root request
+            let mut guard = messages_list.lock().expect("Échec du verrouillage");
+            let res = guard.get(&id);
+            match res {
+                Some(ev) => {
+                    match ev {
+                        EventType::HelloThenRootRequest => {
+                            // envoyer la root request
+                            let _ = &guard.remove_entry(&id);
+                            println!("message {} retiré de la liste", id);
+
+                            let rootrequest = construct_message(
+                                ROOTREQUEST,
+                                Vec::new(),
+                                generate_id(),
+                                crypto_pair,
+                            );
+                            //&guard.insert(, v)
+                            return rootrequest;
+                        }
+                        EventType::Hello => {
+                            let _ = &guard.remove_entry(&id);
+                            println!("message {} retiré de la liste", id);
+                        }
+                        _ => {}
+                    }
+                }
+                None => {}
+            }
+        }
+        ROOTREPLY => {
+            // recuperer le pseudo du peers ayant repondu
+            let peers_exist = handhsake_history.get_peer_info_ip(ip.to_string());
+            match peers_exist {
+                Some(peerinfo) => {
+                    let mut guard = messages_list.lock().expect("Échec du verrouillage");
+                    let res = guard.get(&id);
+                    match res {
+                        Some(ev) => {
+                            match ev {
+                                EventType::RootRequest => {
+                                    // envoyer la root request
+                                    let _ = &guard.remove_entry(&id);
+                                    println!("message {} retiré de la liste", id);
+
+                                    // envoyer le hash a la gui
+                                    let received_hash: NodeHash = received_message
+                                        [LENGTH..(32 + LENGTH)]
+                                        .try_into()
+                                        .expect("incorrect size");
+                                    let res =
+                                        cmd_tx_clone.send(NetworkEvent::FileTreeRootReceived(
+                                            peerinfo.username.clone(),
+                                            received_hash,
+                                        ));
+                                    println!("file tree sent");
+                                    // envoyer un datum
+                                    let mut payload = Vec::new();
+                                    payload.extend_from_slice(&received_hash);
+                                    let new_id = generate_id();
+                                    let datumreqest = construct_message(
+                                        DATUMREQUEST,
+                                        payload,
+                                        new_id,
+                                        crypto_pair,
+                                    );
+                                    constructed_message = datumreqest;
+                                    guard.insert(new_id, EventType::DatumRequest);
+                                }
+                                _ => {}
+                            }
+                        }
+                        None => {}
+                    }
+                }
+                None => {
+                    eprintln!("no peers found");
+                }
+            }
+        }
+        DATUM => {
+            let mut guard = messages_list.lock().expect("Échec du verrouillage");
+            let res = guard.get(&id);
+            match res {
+                Some(ev) => match ev {
+                    EventType::DatumRequest => {
+                        let _ = &guard.remove_entry(&id);
+                        println!("message {} retiré de la liste", id);
+                        let received_length = u16::from_be_bytes(
+                            received_message[TYPE..LENGTH]
+                                .try_into()
+                                .expect("incorrect size"),
+                        );
+                        let received_datum = &received_message[LENGTH..];
+                        let parsed_node =
+                            parse_received_datum(received_datum.to_vec(), received_length as usize);
+                        match parsed_node {
+                            Some(tuple) => {
+                                let _ = cmd_tx.send(NetworkEvent::FileTreeReceived(
+                                    tuple.0,
+                                    tuple.1,
+                                    ip.to_string(),
+                                ));
+                            }
+                            None => {}
+                        }
+                    }
+                    EventType::DatumRequestBig => {
+                        let _ = &guard.remove_entry(&id);
+                        println!("message {} retiré de la liste", id);
+                        let received_length = u16::from_be_bytes(
+                            received_message[TYPE..LENGTH]
+                                .try_into()
+                                .expect("incorrect size"),
+                        );
+                        println!("received length:{}", received_length);
+                        let received_datum = &received_message[LENGTH..];
+                        let parsed_node =
+                            parse_received_datum(received_datum.to_vec(), received_length as usize);
+                        match parsed_node {
+                            Some(tuple) => {
+                                let _ = cmd_tx.send(NetworkEvent::DataReceived(
+                                    tuple.0,
+                                    tuple.1,
+                                    ip.to_string(),
+                                ));
+                                println!("datareceived event sent");
+                            }
+                            None => {}
+                        }
+                    }
+                    _ => {}
+                },
+                None => {}
+            }
+        }
+        ROOTREQUEST => {
+            println!("root request received");
+            let _ = cmd_tx.send(NetworkEvent::RootRequest(ip.to_string()));
+        }
+        DATUMREQUEST => {
+            let received_length = u16::from_be_bytes(
+                received_message[TYPE..LENGTH]
+                    .try_into()
+                    .expect("incorrect size"),
+            );
+            let received_hash = &received_message[LENGTH..LENGTH + received_length as usize];
+            let _ = cmd_tx.send(NetworkEvent::DatumRequest(
+                received_hash.try_into().expect("incorrect size"),
+                ip.to_string(),
+            ));
+        }
+        _ => return None,
+    };
+    constructed_message
+}

client-network/src/messages_channels.rs

@@ -0,0 +1,302 @@
+use crossbeam_channel::Receiver;
+use tokio::sync::oneshot;
+use tokio::time::sleep;
+
+use crate::P2PSharedData;
+use crate::message_handling::EventType;
+use crate::message_handling::handle_recevied_message;
+use crate::peers_refresh::HandshakeHistory;
+use crate::threads_handling::Worker;
+use std::clone;
+use std::collections::{HashMap, HashSet};
+use std::hash::Hash;
+use std::net::SocketAddr;
+use std::net::UdpSocket;
+use std::sync::{Arc, Mutex};
+
+use std::sync::mpsc::{self, Sender};
+use std::thread;
+
+use std::collections::VecDeque;
+use std::time::SystemTime;
+use std::time::UNIX_EPOCH;
+use std::time::{Duration, Instant};
+
+use crate::NetworkEvent;
+
+pub struct Message {
+    pub payload: Vec<u8>,
+    pub address: String,
+    pub is_resp_to_server_handshake: bool,
+}
+
+struct RetryMessage {
+    msg: Message,
+    attempts: u8,
+    next_try: u64,
+}
+
+pub struct MultipleSenders {
+    sender: crossbeam_channel::Sender<Message>,
+    receiver: crossbeam_channel::Receiver<Message>,
+    response_channel: crossbeam_channel::Sender<NetworkEvent>,
+    retry_queue: Arc<Mutex<VecDeque<RetryMessage>>>,
+    completed_messages: HashSet<i32>,
+}
+
+impl MultipleSenders {
+    pub fn new(
+        num_channels: usize,
+        socket: &Arc<UdpSocket>,
+        cmd_tx: crossbeam_channel::Sender<NetworkEvent>,
+        threads: &mut Vec<Worker>,
+    ) -> Self {
+        let (tx1, rx1) = crossbeam_channel::unbounded();
+
+        for i in 0..num_channels {
+            let sock_clone = Arc::clone(&socket);
+            let cmd_tx_clone = cmd_tx.clone();
+            let rx: Receiver<Message> = rx1.clone();
+
+            let thread = thread::spawn(move || {
+                println!("Canal d'envoi {} prêt", i);
+
+                loop {
+                    // Priorité aux messages en attente prêts à être réessayés
+                    // Si aucun retry prêt, on bloque sur rx avec timeout court, pour pouvoir traiter les timers
+                    let msg = rx.recv().unwrap();
+                    match sock_clone.send_to(&msg.payload, &msg.address) {
+                        Ok(_) => {
+                            if msg.is_resp_to_server_handshake {
+                                let res = cmd_tx_clone.send(NetworkEvent::ConnectedHandshake());
+                            }
+                            let message_id: [u8; 4] =
+                                msg.payload[0..4].try_into().expect("size error");
+                            let id = i32::from_be_bytes(message_id);
+                            let message_type = msg.payload[4];
+                            println!(
+                                "Message {0} de type {1} envoyé à {2} par le canal {3}",
+                                id, message_type, msg.address, i
+                            );
+                        }
+                        Err(e) => {
+                            eprintln!(
+                                "Erreur d'envoi initial sur canal {}: {}, address: {}",
+                                i, e, &msg.address
+                            );
+                        }
+                    }
+                }
+            });
+
+            threads.push(Worker::spawn(
+                thread,
+                crate::threads_handling::WorkerType::MSGSENDER,
+            ));
+        }
+
+        MultipleSenders {
+            sender: tx1,
+            receiver: rx1,
+            response_channel: cmd_tx.clone(),
+            retry_queue: Arc::new(Mutex::new(VecDeque::new())),
+            completed_messages: HashSet::new(),
+        }
+    }
+    /*
+    /// Envoie un message via un canal spécifique (round-robin ou index précis)
+    pub fn send_via(
+        &self,
+        channel_idx: usize,
+        data: Vec<u8>,
+        remote_addr: String,
+        is_resp_to_server_handshake: bool,
+        messages_list: &Mutex<HashMap<i32, EventType>>,
+    ) {
+        println!(
+            "is_resp_to_server_handshake {}",
+            is_resp_to_server_handshake
+        );
+        let msg_to_send = Message {
+            payload: data.clone(),
+            address: remote_addr,
+            is_resp_to_server_handshake,
+        };
+        if let Some(sender) = self.senders.get(channel_idx) {
+            let _ = sender.send(msg_to_send);
+        }
+        if !is_resp_to_server_handshake {
+            let mut guard = messages_list.lock().unwrap();
+            let message_id: [u8; 4] = data[0..4].try_into().expect("size error");
+            let id = i32::from_be_bytes(message_id);
+            guard.insert(id, EventType::SendRootRequest);
+        }
+    }*/
+
+    pub fn send_dispatch(
+        &self,
+        data: Vec<u8>,
+        remote_addr: String,
+        is_resp_to_server_handshake: bool,
+        messages_list: Arc<Mutex<HashMap<i32, EventType>>>,
+    ) {
+        let msg_to_send = Message {
+            payload: data.clone(),
+            address: remote_addr,
+            is_resp_to_server_handshake,
+        };
+        let _ = self.sender.send(msg_to_send);
+        println!("message sent");
+    }
+
+    pub fn add_message_to_retry_queue(
+        &self,
+        data: Vec<u8>,
+        remote_addr: String,
+        is_resp_to_server_handshake: bool,
+    ) {
+        let msg_to_send = Message {
+            payload: data.clone(),
+            address: remote_addr,
+            is_resp_to_server_handshake,
+        };
+        let base: u64 = 2;
+        let attempts = 1;
+        let backoff = base.saturating_pow(attempts); // 2^1 == 2 seconds
+        let newretry = RetryMessage {
+            next_try: SystemTime::now()
+                .duration_since(UNIX_EPOCH)
+                .expect("clock")
+                .as_secs()
+                + backoff,
+            msg: msg_to_send,
+            attempts: attempts as u8,
+        };
+
+        let mut guard = self.retry_queue.lock().unwrap();
+        guard.push_back(newretry);
+    }
+}
+
+pub fn start_retry_thread(
+    senders: Arc<MultipleSenders>,
+    max_attempts: u8,
+    messages_list: Arc<Mutex<HashMap<i32, EventType>>>,
+    threads: &mut Vec<Worker>,
+) {
+    let thread = thread::spawn(move || {
+        loop {
+            thread::sleep(Duration::from_millis(100));
+            let mut q = senders.retry_queue.lock().unwrap();
+            //println!("size of retry thread: {}", q.len());
+            if let Some(front) = q.pop_front() {
+                // on verifie si le message a recu une reponse
+                let message_id: [u8; 4] = front.msg.payload[0..4].try_into().expect("size error");
+                let id = i32::from_be_bytes(message_id);
+
+                let message_type = front.msg.payload[4];
+                let guard = messages_list.lock().unwrap();
+
+                if guard.contains_key(&id) {
+                    drop(guard);
+                    // si le message est n'a pas encore a etre traité, on le
+                    // remet en queue de liste
+                    if front.next_try
+                        <= SystemTime::now()
+                            .duration_since(UNIX_EPOCH)
+                            .expect("clock")
+                            .as_secs()
+                    {
+                        let attempt = front.attempts + 1;
+                        if attempt >= max_attempts {
+                            let str = format!(
+                                "Abandon du message {} de type {} après {} tentatives, address: {}",
+                                id, message_type, front.attempts, front.msg.address
+                            );
+                            println!("{}", str);
+                            if front.msg.is_resp_to_server_handshake {
+                                let res = senders
+                                    .response_channel
+                                    .send(NetworkEvent::ServerHandshakeFailed(str));
+                            }
+                        } else {
+                            let str = format!(
+                                "Reemission du message {} de type {}, {} tentatives, address: {}",
+                                id, message_type, front.attempts, front.msg.address
+                            );
+                            println!("{}", str);
+
+                            senders.send_dispatch(
+                                front.msg.payload.clone(),
+                                front.msg.address.clone(),
+                                front.msg.is_resp_to_server_handshake,
+                                messages_list.clone(),
+                            );
+                            let base: u64 = 2;
+
+                            let backoff = base.saturating_pow(attempt as u32); // 2^1 == 2 seconds
+                            let newretry = RetryMessage {
+                                next_try: SystemTime::now()
+                                    .duration_since(UNIX_EPOCH)
+                                    .expect("clock")
+                                    .as_secs()
+                                    + backoff,
+                                msg: front.msg,
+                                attempts: attempt,
+                            };
+
+                            q.push_back(newretry); // remettre en tête pour réessayer plus tôt
+                        }
+                    } else {
+                        q.push_back(front); // remettre en tête pour réessayer plus tôt
+                    }
+                }
+            }
+        }
+    });
+    threads.push(Worker::spawn(
+        thread,
+        crate::threads_handling::WorkerType::MSGRETRY,
+    ));
+}
+
+pub fn start_receving_thread(
+    shared_data: &mut P2PSharedData,
+    cmd_tx: crossbeam_channel::Sender<NetworkEvent>,
+    handshake_history: Arc<HandshakeHistory>,
+) {
+    let sock_clone = shared_data.socket();
+    let cryptopair_clone = shared_data.cryptopair();
+    let senders_clone = shared_data.senders();
+    let messages_clone = shared_data.messages_list();
+    let messages_received_clone = shared_data.messages_received();
+    let servername_clone = shared_data.servername();
+    let thread = thread::spawn(move || {
+        let mut buf = [0u8; 1024];
+        loop {
+            match sock_clone.recv_from(&mut buf) {
+                Ok((amt, src)) => {
+                    let received_data = buf[..amt].to_vec();
+
+                    println!("Reçu {} octets de {}: {:?}", amt, src, received_data);
+                    handle_recevied_message(
+                        &messages_clone,
+                        &messages_received_clone,
+                        &received_data,
+                        &cryptopair_clone,
+                        &senders_clone,
+                        &servername_clone,
+                        cmd_tx.clone(),
+                        src,
+                        handshake_history.clone(),
+                    );
+                }
+                Err(e) => eprintln!("Erreur de réception: {}", e),
+            }
+        }
+    });
+    shared_data.threads.push(Worker::spawn(
+        thread,
+        crate::threads_handling::WorkerType::MSGRECEPTION,
+    ));
+}

client-network/src/messages_structure.rs

@@ -1,50 +1,246 @@
-struct UDPMessage {
+use crate::cryptographic_signature::{CryptographicSignature, sign_message};
-    id: [u8; 4],
+
-    msg_type: u8,
+const ID: usize = 4;
-    length: [u8; 2],
+const TYPE: usize = 5;
-    body: [u8; 985],
+const LENGTH: usize = 7;
-    signature: [u8; 32],
+const EXTENSIONS: usize = 4;
+const SIGNATURE: usize = 64;
+
+pub(crate) const PING: u8 = 0;
+pub(crate) const OK: u8 = 128;
+pub(crate) const ERROR: u8 = 129;
+pub(crate) const HELLO: u8 = 1;
+pub(crate) const HELLOREPLY: u8 = 130;
+pub(crate) const ROOTREQUEST: u8 = 2;
+pub(crate) const ROOTREPLY: u8 = 131;
+pub(crate) const DATUMREQUEST: u8 = 3;
+pub(crate) const NODATUM: u8 = 133;
+pub(crate) const DATUM: u8 = 132;
+pub(crate) const NATTRAVERSALREQUEST: u8 = 4;
+pub(crate) const NATTRAVERSALREQUEST2: u8 = 5;
+
+pub fn construct_message(
+    msgtype: u8,
+    payload: Vec<u8>,
+    id: i32,
+    crypto_pair: &CryptographicSignature,
+) -> Option<Vec<u8>> {
+    let mut message = Vec::new();
+
+    // ID
+    // type
+    message.extend_from_slice(&id.to_be_bytes());
+
+    message.push(msgtype);
+
+    match msgtype {
+        HELLO | HELLOREPLY => {
+            // length
+            let a = payload.len() as u16;
+            println!("payload size:{}", a);
+            message.extend_from_slice(&a.to_be_bytes());
+            message.extend_from_slice(&payload);
+            let signature = sign_message(crypto_pair, &message);
+            return Some(signature);
+        }
+        PING | OK | ROOTREQUEST => {
+            message.extend_from_slice(&0u16.to_be_bytes());
+            return Some(message);
+        }
+        ERROR | DATUMREQUEST => {
+            let a = payload.len() as u16;
+            println!("payload size:{}", a);
+            message.extend_from_slice(&a.to_be_bytes());
+            message.extend_from_slice(&payload);
+            return Some(message);
+        }
+        ROOTREPLY | NODATUM | DATUM | NATTRAVERSALREQUEST => {
+            println!("payload:{:?}", &payload);
+            let a = payload.len() as u16;
+            println!("payload size:{}", a);
+            message.extend_from_slice(&a.to_be_bytes());
+            message.extend_from_slice(&payload);
+            println!("payload:{:?}", &message);
+            let signature = sign_message(crypto_pair, &message);
+            message.extend_from_slice(&signature);
+            println!("message_to_send_len:{}", &message.len());
+            return Some(signature);
+        }
+
+        _ => {}
+    }
+    None
 }
 
-struct HandshakeMessage {
+pub struct UDPMessage {
-    id: [u8; 4],
+    id: u32,
     msg_type: u8,
-    length: [u8; 2],
+    length: u16,
-    extensions: [u8; 4],
+    body: Vec<u8>,
-    name: [u8; 981],
+    signature: Vec<u8>,
-    signature: [u8; 32],
 }
 
+pub struct HandshakeMessage {
+    pub id: u32,
+    msg_type: u8,
+    length: u16,
+    extensions: u32,
+    pub name: Vec<u8>,
+    pub signature: Vec<u8>,
+}
+
+pub struct NatTraversal {}
+
 impl UDPMessage {
-    pub fn ping(id: i32) -> UDPMessage {
+    pub fn ping(id: u32) -> UDPMessage {
-        UDPMessage { id: id.to_ne_bytes(), msg_type: 0, length: [0; 2], body: [0; 985], signature: [0; 32]}
+        UDPMessage {
+            id: id,
+            msg_type: 0,
+            length: 0,
+            body: vec![0; 985],
+            signature: vec![0; 32],
+        }
     }
 
-    pub fn error(id: i32) -> UDPMessage {
+    pub fn error(id: u32) -> UDPMessage {
-        
+        UDPMessage {
-        UDPMessage { id: id.to_ne_bytes(), msg_type: 129, length: [0; 2], body: [0; 985], signature: [0; 32]}
+            id: id,
+            msg_type: 129,
+            length: 0,
+            body: vec![0; 985],
+            signature: vec![0; 32],
+        }
     }
 
-    pub fn hello(id: i32, length: i16, username: String) -> HandshakeMessage {
+    pub fn parse(received_message: Vec<u8>) -> UDPMessage {
-        let username_bytes = username.as_bytes();
+        let id_bytes: [u8; 4] = received_message[0..4]
-    
+            .try_into()
-        let mut body: [u8; 981] = [0; 981];
+            .expect("Taille incorrecte");
-    
+        let length_bytes: [u8; 2] = received_message[5..7]
-        let length_to_copy = username_bytes.len().min(981);
+            .try_into()
-        body[..length_to_copy].copy_from_slice(&username_bytes[..length_to_copy]);
+            .expect("Taille incorrecte");
-        HandshakeMessage {id: id.to_ne_bytes(), msg_type: 1, length: length.to_ne_bytes(), extensions: [0;4], name: body, signature: [0;32]}
+        let msg_length = u16::from_be_bytes(length_bytes);
-
+        let name_bytes = &received_message[7..msg_length as usize + 8];
+        let signature_bytes =
+            &received_message[msg_length as usize + 8..msg_length as usize + 9 + 32];
+        UDPMessage {
+            id: u32::from_be_bytes(id_bytes),
+            msg_type: received_message[4],
+            length: u16::from_be_bytes(length_bytes),
+            body: name_bytes.to_vec(),
+            signature: signature_bytes.to_vec(),
+        }
     }
 
-    pub fn helloReply(id: i32, length: i16, username: String) -> HandshakeMessage {
+    pub fn display(&self) {
-        let username_bytes = username.as_bytes();
+        println!("ID: {:?}", self.id);
-    
+        println!("Message Type: {}", self.msg_type);
-        let mut body: [u8; 981] = [0; 981];
+        println!("Length: {:?}", self.length);
-    
+        let good_length = usize::min(self.length as usize, 985);
-        let length_to_copy = username_bytes.len().min(981);
+        println!("name: {:?}", &self.body[..good_length]);
-        body[..length_to_copy].copy_from_slice(&username_bytes[..length_to_copy]);
+        println!("Signature: {:?}", self.signature);
-        HandshakeMessage {id: id.to_ne_bytes(), msg_type: 130, length: length.to_ne_bytes(), extensions: [0;4], name: body, signature: [0;32]}
-
     }
 }
 
+impl HandshakeMessage {
+    pub fn display(&self) {
+        println!("ID: {:?}", self.id);
+        println!("Message Type: {}", self.msg_type);
+        println!("Length: {:?}", self.length);
+        println!("extensions: {:?}", self.extensions);
+        println!("name: {:?}", &self.name[..(self.length - 4) as usize]);
+        println!("Signature: {:?}", self.signature);
+    }
+    pub fn hello(id: u32, length: u16, username: String) -> HandshakeMessage {
+        let name_vec = username.trim_end_matches(char::from(0)).as_bytes().to_vec();
+        HandshakeMessage {
+            id: id,
+            msg_type: 1,
+            length: length,
+            extensions: 0,
+            name: name_vec,
+            signature: vec![0; 64],
+        }
+    }
+
+    pub fn helloReply(id: u32, length: u16, username: String) -> HandshakeMessage {
+        let name_vec = username.trim_end_matches(char::from(0)).as_bytes().to_vec();
+        HandshakeMessage {
+            id: id,
+            msg_type: 130,
+            length: length,
+            extensions: 0,
+            name: name_vec,
+            signature: vec![0; 64],
+        }
+    }
+
+    pub fn serialize(&self) -> Vec<u8> {
+        let mut out = Vec::with_capacity(4 + 1 + 2 + 4 + self.name.len() + self.signature.len());
+
+        // id: u32 little-endian
+        out.extend_from_slice(&self.id.to_be_bytes());
+
+        // msg_type: u8
+        out.push(self.msg_type);
+
+        out.extend_from_slice(&self.length.to_be_bytes());
+
+        out.extend_from_slice(&self.extensions.to_be_bytes());
+
+        out.extend_from_slice(&self.name);
+
+        out.extend_from_slice(&self.signature);
+
+        out
+    }
+
+    pub fn parse(received_message: Vec<u8>) -> HandshakeMessage {
+        let id_bytes: [u8; 4] = received_message[0..4]
+            .try_into()
+            .expect("Taille incorrecte");
+        let length_bytes: [u8; 2] = received_message[5..7]
+            .try_into()
+            .expect("Taille incorrecte");
+        let msg_length = u16::from_be_bytes(length_bytes);
+        let extensions_bytes: [u8; 4] = received_message[7..11]
+            .try_into()
+            .expect("Taille incorrecte");
+        let name_bytes = &received_message[11..(11 + msg_length - 4) as usize];
+        let signature_bytes =
+            &received_message[(11 + msg_length - 4) as usize..(11 + msg_length - 4 + 64) as usize];
+        HandshakeMessage {
+            id: u32::from_be_bytes(id_bytes),
+            msg_type: received_message[4],
+            length: u16::from_be_bytes(length_bytes),
+            extensions: u32::from_be_bytes(extensions_bytes),
+            name: name_bytes.to_vec(),
+            signature: signature_bytes.to_vec(),
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    // Note this useful idiom: importing names from outer (for mod tests) scope.
+    use super::*;
+    /*
+    /// creates an handshake message
+    #[tokio::test]
+    async fn creating_handshake_msg() {
+        let username = String::from("charlie_kirk");
+        let handshake = HandshakeMessage::hello(0, 12, username);
+        handshake.display();
+    }
+
+    /// parses an handshake message
+    #[tokio::test]
+    async fn parse_handshakemessage() {
+        let username = String::from("charlie_kirk");
+        let handshake = HandshakeMessage::hello(0, 12, username);
+        let ser = handshake.serialize();
+        let parsed = HandshakeMessage::parse(ser);
+        handshake.display();
+        parsed.display();
+    }*/
+}

client-network/src/peers_refresh.rs

@@ -0,0 +1,161 @@
+// this class consists of a thread that will re send  pings every time the first element
+// of the stack is at the correct unix time
+
+pub use crate::message_handling::*;
+
+use std::{
+    collections::{HashMap, VecDeque},
+    net::{AddrParseError, Ipv4Addr, SocketAddr},
+    ops::Add,
+    process::Command,
+    sync::{Arc, Mutex},
+    thread::{self, JoinHandle},
+    time::{self, Duration, SystemTime},
+};
+
+use crate::{
+    NetworkEvent, cryptographic_signature::CryptographicSignature,
+    messages_channels::MultipleSenders, threads_handling::Worker,
+};
+use crate::{
+    P2PSharedData, construct_message, generate_id, messages_structure,
+    registration::perform_handshake,
+};
+use crossbeam_channel::{Receiver, Sender};
+use p256::ecdsa::VerifyingKey;
+
+#[derive(Debug, Clone)]
+pub struct PeerInfo {
+    pub username: String,
+    pub pubkey: VerifyingKey,
+    pub ip: SocketAddr,
+}
+
+#[derive(Debug, Clone)]
+pub struct HandshakeHistory {
+    pub username_k_peerinfo_v: Arc<Mutex<HashMap<String, PeerInfo>>>,
+    ip_k_peerinfo_v: Arc<Mutex<HashMap<String, PeerInfo>>>,
+}
+
+impl HandshakeHistory {
+    pub fn new() -> HandshakeHistory {
+        HandshakeHistory {
+            username_k_peerinfo_v: Arc::new(Mutex::new(HashMap::new())),
+            ip_k_peerinfo_v: Arc::new(Mutex::new(HashMap::new())),
+        }
+    }
+
+    pub fn get_peer_info_username(&self, username: String) -> Option<PeerInfo> {
+        //self.username_k_peerinfo_v.get(&username).clone()
+
+        let guard = self.username_k_peerinfo_v.lock().unwrap();
+
+        guard.get(&username).cloned()
+    }
+
+    pub fn get_peer_info_ip(&self, ip: String) -> Option<PeerInfo> {
+        let guard = self.ip_k_peerinfo_v.lock().unwrap();
+
+        guard.get(&ip).cloned()
+    }
+
+    pub fn update_peer_info(&self, ip: String, username: String) {
+        let peerinfo = self.get_peer_info_ip(ip.clone());
+        match peerinfo {
+            Some(peer_info) => match ip.parse::<SocketAddr>() {
+                Ok(addr) => {
+                    let new_peer_info = PeerInfo {
+                        username: username.clone(),
+                        pubkey: peer_info.pubkey,
+                        ip: addr,
+                    };
+                    let mut guardb = self.ip_k_peerinfo_v.lock().unwrap();
+                    guardb.insert(ip.to_string(), new_peer_info.clone());
+                    let mut guard = self.username_k_peerinfo_v.lock().unwrap();
+
+                    guard.insert(username.to_string(), new_peer_info);
+
+                    println!(
+                        "handshake added: {}, {}, {}",
+                        username.to_string(),
+                        ip.to_string(),
+                        guard.len(),
+                    );
+                }
+                Err(e) => eprintln!("parse error: {}", e),
+            },
+            None => {
+                eprintln!("no peer info found in hashmap")
+            }
+        }
+    }
+
+    pub fn get_username_peerinfo_map(&self) -> Arc<Mutex<HashMap<String, PeerInfo>>> {
+        self.username_k_peerinfo_v.clone()
+    }
+
+    pub fn add_new_handshake(&self, hash: VerifyingKey, username: String, ip: SocketAddr) {
+        let peerinfo = PeerInfo {
+            username: username.clone(),
+            pubkey: hash,
+            ip,
+        };
+        let mut guard = self.username_k_peerinfo_v.lock().unwrap();
+        guard.insert(username, peerinfo.clone());
+        let mut guardb = self.ip_k_peerinfo_v.lock().unwrap();
+        guardb.insert(ip.to_string(), peerinfo.clone());
+    }
+}
+
+pub fn update_handshake(
+    senders: Arc<MultipleSenders>,
+    crypto_pair: Arc<CryptographicSignature>,
+    messages_list: Arc<Mutex<HashMap<i32, EventType>>>,
+    username_k_peerinfo_v: Arc<Mutex<HashMap<String, PeerInfo>>>,
+) -> Worker {
+    let map_for_thread = username_k_peerinfo_v.clone();
+    let handle = thread::spawn(move || {
+        loop {
+            let guard = map_for_thread.lock().unwrap();
+            for (peer, peerinfo) in guard.iter() {
+                let id = generate_id();
+                let mut map = messages_list.lock().unwrap();
+                map.insert(id, EventType::Ping);
+                let pingrequest = construct_message(PING, Vec::new(), id, &crypto_pair);
+                if let Some(ping) = pingrequest {
+                    senders.add_message_to_retry_queue(
+                        ping.clone(),
+                        peerinfo.ip.to_string(),
+                        false,
+                    );
+                    senders.send_dispatch(
+                        ping,
+                        peerinfo.ip.to_string(),
+                        false,
+                        messages_list.clone(),
+                    );
+                }
+            }
+            drop(guard);
+            thread::sleep(Duration::from_secs(60));
+        }
+    });
+    Worker::spawn(handle, crate::threads_handling::WorkerType::PING)
+}
+
+#[cfg(test)]
+mod tests {
+    use std::net::{IpAddr, Ipv4Addr};
+
+    use super::*;
+
+    /*#[test]
+    fn creating_cryptographic_signature() {
+        let mut hh = HandshakeHistory::new();
+        hh.add_new_handshake(
+            20,
+            "putain".to_string(),
+            SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), 1),
+        );
+    }*/
+}

client-network/src/protocol.rs

@@ -1,49 +0,0 @@
-use http::{Request, Response};
-use p256::ecdsa::{
-    Signature, SigningKey, VerifyingKey,
-    signature::{Signer, Verifier},
-};
-use rand_core::OsRng;
-
-struct KeyRegistration {
-    priv_key: SigningKey,
-    pub_key: VerifyingKey,
-    username: String,
-}
-
-impl KeyRegistration {
-    fn new(username: String) -> KeyRegistration {
-        let priv_key = SigningKey::random(&mut OsRng);
-        let pub_key = VerifyingKey::from(&priv_key);
-        KeyRegistration {
-            priv_key: priv_key,
-            pub_key: pub_key,
-            username: username,
-        }
-    }
-}
-
-async fn register_with_the_server(key: KeyRegistration) -> Result<bytes::Bytes, reqwest::Error> {
-    let client = reqwest::Client::new();
-
-    let pubkey_ser = key.pub_key.to_encoded_point(false);
-    let pubkey_str = hex::encode(pubkey_ser);
-    let uri = format!("https://jch.irif.fr:8443/peers/{}/key", key.username);
-    let resp = client.put(uri).send().await?.error_for_status()?;
-
-    resp.bytes().await
-}
-
-/*#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn key_genereation() {
-        let keys = KeyRegistration::new();
-        let pubkey = keys.pub_key;
-        let pubkey_ser = pubkey.to_encoded_point(false);
-        println!("string pubkey: {}", hex::encode(pubkey_ser));
-        println!("string privkey: {}", hex::encode(keys.priv_key.to_bytes()))
-    }
-}*/

client-network/src/registration.rs

@@ -1,50 +1,174 @@
-use crate::cryptographic_signature::{CryptographicSignature, formatPubKey};
+use crate::NetworkEvent;
-use std::net::UdpSocket;
+use crate::P2PSharedData;
+use crate::cryptographic_signature::CryptographicSignature;
+use crate::get_server_address;
+use crate::get_socket_address;
+use crate::message_handling::EventType;
+use crate::messages_structure::construct_message;
+use crate::server_communication::generate_id;
+use crossbeam_channel::Sender;
+use std::net::SocketAddr;
+use std::str::FromStr;
+use std::sync::Arc;
+
 ///
-/// Registration with the server happens in two steps: first, the client
+/// sends the cryptographic signature to the server using a PUT request over the HTTP API.
-/// sends its cryptographic signature to the server using a PUT request over the HTTP API. 
+///
-async fn register_with_the_server(crypto_pair: CryptographicSignature) -> Result<(), reqwest::Error>{ 
+pub async fn register_with_the_server(
+    crypto_pair: &Arc<CryptographicSignature>,
+    server_uri: &String,
+) -> Result<(), reqwest::Error> {
     let client = reqwest::Client::new();
-    let uri = format!("https://jch.irif.fr:8443/peers/{}/key", crypto_pair.username);
+    let uri = format!("{0}/peers/{1}/key", server_uri, crypto_pair.username);
     let encoded_point = crypto_pair.pub_key.to_encoded_point(false);
     let pubkey_bytes = encoded_point.as_ref().to_vec();
     let pubkey_bytes_minus = pubkey_bytes[1..].to_vec();
-    // In order to register with the server, a peer ϕ makes a PUT request to the URL /peers/ϕ/key with its 64-byte public key in the body 
+    let res = client.put(uri).body(pubkey_bytes_minus).send().await?;
-    let res = client.put(uri)
+    let res = res.error_for_status()?;
-        .body(pubkey_bytes_minus)
+    match res.error_for_status() {
-        .send()
+        Ok(_) => {
-        .await?;
+            println!("register ip adresses");
-    if res.status().is_success() {
+            Ok(())
-        println!("Successfully registered with the server.");
+        }
-    } else {
+        Err(e) => Err(e),
-        eprintln!("Failed to register with the server. Status: {}", res.status());
-        let str = hex::encode(res.bytes().await?);
-        eprintln!("erreur : {}", str);
     }
-    Ok(())
 }
 
-/// It then
+pub fn parse_addresses(input: &String) -> Vec<SocketAddr> {
-/// registers each of its IP addresses by sending a Hello request to the server.
+    let mut addrs = Vec::new();
-/// After the client sends a Hello request to the server, the server will verify that the client is able
+    for line in input.lines() {
-/// to receive requests by sending a Hello request to the client. If the client doesn’t reply to the Hello
+        let s = line.trim();
-/// request with a properly signed message, its address will not be published by the server.
+        if s.is_empty() {
-fn register_ip_addresses(crypto_pair: CryptographicSignature) {
+            continue;
-   let socket = UdpSocket::bind("127.0.0.1:4242");  
+        }
-   //TODO
+        if let Ok(sock) = SocketAddr::from_str(s) {
+            addrs.push(sock);
+        }
+    }
+    addrs
+}
+
+///
+/// registers the IP addresses by sending a Hello request to the server.
+///
+pub async fn perform_handshake(
+    sd: &P2PSharedData,
+    username: String,
+    ip: String,
+    event_tx: Sender<NetworkEvent>,
+    is_server_handshake: (bool, String),
+) -> bool {
+    println!("username: {}, ip: {}", username.clone(), ip.clone());
+    let crypto_pair = sd.cryptopair_ref();
+    let senders = sd.senders_ref();
+
+    let id = generate_id();
+
+    let address = {
+        if is_server_handshake.0 {
+            is_server_handshake.1
+        } else {
+            let server_addr_query =
+                get_socket_address(username.clone(), ip.clone(), Some(sd)).await;
+
+            match server_addr_query {
+                Ok(sockaddr_bytes) => sockaddr_bytes.to_string(),
+                Err(err_msg) => {
+                    match event_tx.send(NetworkEvent::Error(
+                        err_msg.to_string(),
+                        username.to_owned(),
+                    )) {
+                        Ok(_) => {}
+                        Err(err) => {
+                            println!("Network Event Error : {}", err.to_string());
+                        }
+                    }
+                    "".to_string()
+                }
+            }
+        }
+    };
+
+    if address.eq(&"".to_string()) {
+        return false;
+    }
+
+    let mut payload = Vec::new();
+    payload.extend_from_slice(&0u32.to_be_bytes());
+    payload.extend_from_slice(&crypto_pair.username.clone().as_bytes());
+    let hello_handshake = construct_message(1, payload, id, crypto_pair);
+    if is_server_handshake.0 {
+        sd.add_message(id, EventType::Hello);
+    } else {
+        sd.add_message(id, EventType::HelloThenRootRequest);
+    }
+
+    match hello_handshake {
+        Some(handshake_message) => {
+            senders.send_dispatch(
+                handshake_message,
+                address,
+                is_server_handshake.0,
+                sd.messages_list(),
+            );
+        }
+        None => {}
+    }
+
+    //let server_addr_query = get_socket_address(username.clone(), ip.clone(), Some(sd)).await;
+    //match server_addr_query {
+    //    Ok(sockaddr_bytes) => {}
+    //    Err(err_msg) => {}
+    //}
+
+    /*let mut list = messages_list.lock().expect("Failed to lock messages_list");
+    match list.get(&id) {
+        Some(_) => {
+            list.remove(&id);
+        }
+        None => {
+            list.insert(id, EventType::ServerHelloReply);
+        }
+    }
+    println!("message sent: {}", &id);*/
+    // 3. Perform the insertion
+    /*let mut buf = [0u8; 1024];
+    socket.recv_from(&mut buf).expect("receive failed");
+    let hello_handshake_received = UDPMessage::parse(buf.to_vec());
+    hello_handshake_received.display();*/
+    //TODO
+    return true;
 }
 
 #[cfg(test)]
 mod tests {
-    // Note this useful idiom: importing names from outer (for mod tests) scope.
-    use super::*;
 
+    /*///
+    /// does the procedure to register with the server
+    ///
     #[tokio::test]
-    async fn creating_cryptographic_signature() {
+    async fn registering_with_server() {
-        let username = String::from("charlie_kirk");
+        let username = String::from("gameixtreize");
+        let server_uri = String::from("https://jch.irif.fr:8443");
         let crypto_pair = CryptographicSignature::new(username);
-    if let Err(e) = register_with_the_server(crypto_pair).await {
+        if let Err(e) = register_with_the_server(crypto_pair, server_uri).await {
-        eprintln!("Error during registration: {}", e);
+            eprintln!("Error during registration: {}", e);
-    }
+        }
-    }
+    }*/
+
+    /*///
+    /// retreives the socket address of a given peer
+    ///
+    #[tokio::test]
+    async fn retreive_socket_addr() {
+        let username = String::from("ipjkndqfshjldfsjlbsdfjhhj");
+        match get_socket_address(username).await {
+            Ok(body) => {
+                println!("{:?}", body);
+            }
+            Err(e) => {
+                eprintln!("Erreur HTTP: {}", e);
+            }
+        }
+    }*/
 }

client-network/src/server_communication.rs

@@ -0,0 +1,22 @@
+use bytes::Bytes;
+use rand::Rng;
+
+pub async fn get_peer_list(server_address: String) -> Result<Bytes, reqwest::Error> {
+    let client = reqwest::Client::new();
+    let uri = format!("{}/peers/", server_address);
+    let res = client.get(uri).send().await?;
+    if res.status().is_success() {
+        println!("Successfully retreived the addresses.");
+    } else {
+        eprintln!(
+            "Failed to get the peers addresses from the server. Status: {}",
+            res.status()
+        );
+    }
+    let body: Bytes = res.bytes().await?;
+    Ok(body)
+}
+
+pub fn generate_id() -> i32 {
+    rand::rng().random_range(0..i32::MAX)
+}

client-network/src/threads_handling.rs

@@ -0,0 +1,35 @@
+use std::sync::{
+    Arc,
+    atomic::{AtomicBool, Ordering},
+};
+use std::thread::JoinHandle;
+
+pub enum WorkerType {
+    MSGRECEPTION,
+    MSGSENDER,
+    PING,
+    MSGRETRY,
+}
+
+pub struct Worker {
+    thread: Option<JoinHandle<()>>,
+    stop: Arc<AtomicBool>,
+    workertype: WorkerType,
+}
+
+impl Worker {
+    pub fn spawn(thread: JoinHandle<()>, workertype: WorkerType) -> Self {
+        Worker {
+            stop: Arc::new(AtomicBool::new(false)),
+            thread: Some(thread),
+            workertype,
+        }
+    }
+
+    pub fn stop(mut self) {
+        self.stop.store(true, Ordering::Relaxed);
+        if let Some(h) = self.thread.take() {
+            let _ = h.join();
+        }
+    }
+}

client-network/src/timestamp.rs

@@ -0,0 +1,46 @@
+use std::time::{SystemTime, UNIX_EPOCH};
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct Timestamp {
+    secs: u64, // seconds since UNIX epoch
+}
+
+unsafe impl Send for Timestamp {}
+
+impl Timestamp {
+    // Create a Timestamp from current system time
+    pub fn now() -> Self {
+        let dur = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .expect("system time before UNIX_EPOCH");
+        Self {
+            secs: dur.as_secs(),
+        }
+    }
+
+    // Create from explicit fields (optional helper)
+    pub fn from_secs(secs: u64) -> Self {
+        Self { secs }
+    }
+
+    // Return underlying seconds
+    pub fn as_secs(&self) -> u64 {
+        self.secs
+    }
+
+    // Return elapsed seconds between `self` and `other`.
+    // Panics if `other` is in the future relative to `self`.
+    // If you call `Timestamp::now().diff(past)`, it returns seconds since `past`.
+    pub fn diff(&self, earlier: &Timestamp) -> u64 {
+        assert!(earlier.secs <= self.secs, "given time is in the future");
+        self.secs - earlier.secs
+    }
+
+    pub fn to_string(&self) -> String {
+        let secs_of_day = self.secs % 86_400;
+        let hh = secs_of_day / 3600;
+        let mm = (secs_of_day % 3600) / 60;
+        let ss = secs_of_day % 60;
+        format!("{:02}:{:02}:{:02}", hh, mm, ss)
+    }
+}

todo.md

@@ -1,33 +1,37 @@
-# Todo : 
+# Todo
-## peer discovery
-- get rsquest to the uri /peers/
 
-## registration with the server
+
+## fonctionnalités :
+- proposer des fichiers
+- telechargement des fichiers
+- receivers threads
+- ask for nat traversal
+
+## autre
+
+socket ipv6
+
+# FAIT
+
+rechercher les fichiers d'un pair OK
+- choisir un pseudo OK
+- get rsquest to the uri /peers/ OK
 - generation of the cryptographic key OK
 - put request to the uri (check if the peer is already connected) OK
-- udp handshakes
+- get request to the uri /peers/key to get the public key of a peer OK
-- get request to the uri /peers/key to get the public key of a peer
+- get request to the uri /peers/key/addresses OK
-- get request to the uri /peers/key/addresses
+- udp handshakes OK
-
+- handshake structure OK
-## handshake
+- s'enregistrer avec le serveur OK
-- handshake structure
+- generer une clé publique OK
-- 5min timeout after handshake
+- verifier signature OK
-- matain connection every 4 min
+- 2 channels -> un pour envoyer et un pour recevoir OK
-
+- get rsquest to the uri /peers/ OK
-## data transfer
 - request structure
 - root/root reply structure
 - datum/nodatum and datum structures
 - nattraversal 1 and 2 structures
-- setting in gui to act as a relay
 - chunk, directory, big, bigdirectory structures
-
+- ajouter hello et nat a l'exp backoff OK
-fonctionnalités :
+- peers n'ayant pas d'adresse OK
-
+- verifier le refresh des peers OK
-s'enregistrer avec le serveur OK
-rechercher un pair
-generer une clé publique OK
-rechercher les fichiers d'un pair
-telechargement des fichiers
-choisir un dossier à partager
-se deconnecter du réseau