some modifications

Reviewed-on: #2

client-gui/src/gui_app.rs

@@ -1,30 +1,36 @@
 use client_network::{
-    MerkleNode, MerkleTree, NetworkCommand, NetworkEvent, NodeHash, filename_to_string,
+    ChunkNode, MerkleNode, MerkleTree, NetworkCommand, NetworkEvent, NodeHash, filename_to_string,
     node_hash_to_hex_string,
 };
 use crossbeam_channel::{Receiver, Sender};
 use egui::{
     Align, Align2, Button, CentralPanel, CollapsingHeader, Context, Id, LayerId, Layout, Order,
-    Popup, ScrollArea, SidePanel, TopBottomPanel, Ui, ViewportCommand,
+    Popup, ScrollArea, SidePanel, TextStyle, TopBottomPanel, Ui, ViewportCommand,
 };
-use std::collections::HashMap;
+use std::{collections::HashMap, fmt::format};
 
 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)>,
     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>,
@@ -33,33 +39,70 @@ pub struct P2PClientApp {
     active_peer: Option<String>,
 
     server_status: ServerStatus,
+
+    show_network_popup: bool, // gérer selon besoin
+
+    error_message: Option<String>, // Some(message) -> afficher, None -> rien
+    //
+    active_server: 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 tree = MerkleTree::new(tree_content, root_hash);
-        loaded_fs.insert("bob".to_string(), tree);
+        //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![("bob".to_string(), true)],
-            connect_address_input: "127.0.0.1:8080".to_string(),
+            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,
+            connect_name_input: "bob".to_string(),
+            active_server: "".to_string(),
         }
     }
+    pub fn show_error(&mut self, msg: impl Into<String>) {
+        self.error_message = Some(msg.into());
+    }
+    pub fn clear_error(&mut self) {
+        self.error_message = None;
+    }
 }
 
 // --- 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 +111,82 @@ 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::PeerListUpdated(peers) => {
-                    todo!();
+                    //todo!();
 
                     self.known_peers = peers;
                 }
                 NetworkEvent::FileTreeReceived(_peer_id, _) => {
                     todo!();
 
-                    // self.loaded_tree_nodes.insert(_peer_id, tree);
+                    //self.loaded_tree_nodes.insert(_peer_id, tree);
-                    self.status_message = "🔄 File tree updated successfully.".to_string();
+                    //self.status_message = "🔄 File tree updated successfully.".to_string();
                 }
                 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 mut data_map: HashMap<NodeHash, MerkleNode> = HashMap::new();
-                    //     peer_id,
+                        data_map.insert(root_hash, MerkleNode::Chunk(chunknode));
-                    //     root_hash,
+                        let tree = MerkleTree {
-                    // ));
+                            data: data_map,
+                            root: root_hash,
+                        };
+                        match &self.active_peer {
+                            Some(activepeer) => {
+                                self.loaded_fs.insert(activepeer.clone(), tree);
                             }
-                NetworkEvent::Connected() => {
+                            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(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) => {
+                    self.show_error(err);
                 }
-                NetworkEvent::Disconnected() => todo!(),
-                NetworkEvent::Error() => todo!(),
                 NetworkEvent::DataReceived(_, merkle_node) => todo!(),
+                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());
+                }
             }
         }
 
@@ -122,19 +205,104 @@ impl eframe::App for P2PClientApp {
                 });
 
                 ui.menu_button("Network", |ui| {
+                    match self.server_status {
+                        ServerStatus::Connected | ServerStatus::ConnectedHandshake => {
+                            let desired = egui::vec2(300.0, 0.0); // width 300, auto-height if 0
+                            ui.set_min_size(desired);
+                            ui.vertical(|ui| {
+                                if ui.button("Disconnect").clicked() {
+                                    println!("Disconnecting...");
+                                    let _ = self.network_cmd_tx.send(NetworkCommand::Disconnect());
+                                    self.server_status = ServerStatus::NotConnected;
+                                    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::ConnectToServer(addr));
+                                        .send(NetworkCommand::ConnectToServerPut(addr, name));
                                     self.server_status = ServerStatus::Loading;
                                     ui.close();
                                 }
                             });
+                        }
+                        _ => {}
+                    }
+
+                    /* ui.horizontal(|ui| {
+                        ui.label("Server peer name:");
+                        ui.text_edit_singleline(&mut self.connect_server_name_input);
+                        if ui.button("Connect").clicked() {
+                            let addr = self.connect_address_input.clone();
+                            let serv_name = self.connect_server_name_input.clone();
+                            let _ = self
+                                .network_cmd_tx
+                                .send(NetworkCommand::ConnectToServer(addr, serv_name));
+                            self.server_status = ServerStatus::Loading;
+                            ui.close();
+                        }
+                    });*/
                 });
+
+                // état
+
+                /*if ui.button("Network").clicked() {
+                    self.show_network_popup = true;
+                }*/
+
+                /*if self.show_network_popup {
+                    egui::Window::new("Network")
+                        .collapsible(false)
+                        .resizable(false)
+                        .show(ctx, |ui| {
+                            ui.horizontal_wrapped(|ui| {
+                                ui.with_layout(
+                                    egui::Layout::right_to_left(egui::Align::TOP),
+                                    |ui| {
+                                        if ui.button("✕").clicked() {
+                                            self.show_network_popup = false;
+                                        }
+                                    },
+                                );
+                            });
+                            ui.horizontal(|ui| {
+                                ui.label("Server IP:");
+                                ui.text_edit_singleline(&mut self.connect_address_input);
+                            });
+                            ui.horizontal(|ui| {
+                                ui.label("Server peer name:");
+                                ui.text_edit_singleline(&mut self.connect_server_name_input);
+                                if ui.button("Connect").clicked() {
+                                    // envoyer commande...
+                                    let addr = self.connect_address_input.clone();
+                                    let serv_name = self.connect_server_name_input.clone();
+                                    let _ = self
+                                        .network_cmd_tx
+                                        .send(NetworkCommand::ConnectToServer(addr, serv_name));
+                                    self.server_status = ServerStatus::Loading;
+
+                                    self.show_network_popup = false;
+                                }
+                            });
+                        });
+                }*/
             });
         });
 
@@ -145,14 +313,22 @@ impl eframe::App for P2PClientApp {
                         ui.spinner();
                     }
                     ServerStatus::Connected => {
-                        ui.label("📡");
+                        ui.label("Registered but no server peer chosen...");
                     }
                     ServerStatus::NotConnected => {
                         ui.label("No connection..");
                     }
+                    ServerStatus::ConnectedHandshake => {
+                        let str = format!("📡");
+                        ui.label(str);
+                    }
                 }
                 ui.add_space(ui.available_width() - 30.0);
-                ui.label("30:00");
+                // formater mm:ss
+                let secs = self.remaining.as_secs();
+                let minutes = secs / 60;
+                let seconds = secs % 60;
+                ui.label(format!("{:02}:{:02}", minutes, seconds));
             });
         });
 
@@ -164,8 +340,9 @@ 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!(
@@ -184,26 +361,75 @@ impl eframe::App for P2PClientApp {
                     } 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
+                                self.active_peer.as_ref().map_or(false, |id| id == &peer.0); // if peer.id == self.active_peer_id
 
-                            if ui
+                            let selectable;
-                                .selectable_label(is_active, format!("{}", peer))
+                            if &self.active_server == &peer.0 {
-                                .clicked()
+                                selectable =
-                            {
+                                    ui.selectable_label(is_active, format!("{} 📡 🌀", peer.0))
+                            } else {
+                                selectable = ui.selectable_label(is_active, format!("{}", peer.0));
+                            }
+                            if selectable.clicked() {
                                 // switch to displaying this peer's tree
-                                self.active_peer = Some(peer.clone());
+                                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!();
+                                    //todo!();
-                                    // let _ = self.network_cmd_tx.send(NetworkCommand::RequestDirectoryContent(
+                                    let _ = self.network_cmd_tx.send(NetworkCommand::Discover(
-                                    //     peer.clone(),
+                                        peer.0.clone(),
-                                    //     peer.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()));
+                                }
+                                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
+                            });
                         }
                     }
                 });
@@ -238,6 +464,21 @@ 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);
+                    if ui.button("OK").clicked() {
+                        self.clear_error();
+                    }
+                });
+            ctx.request_repaint();
+        }
+
         ctx.request_repaint_after(std::time::Duration::from_millis(10));
     }
 }
@@ -305,7 +546,13 @@ impl P2PClientApp {
                                     entry.content_hash,
                                     tree,
                                     depth + 1,
-                                    Some(entry.filename),
+                                    Some(
+                                        entry
+                                            .filename
+                                            .as_slice()
+                                            .try_into()
+                                            .expect("incorrect size"),
+                                    ),
                                 );
                             }
                         });
@@ -326,7 +573,7 @@ impl P2PClientApp {
                         .enabled(true)
                         .show(ui, |ui| {
                             for child in &node.children_hashes {
-                                self.draw_file_node(ui, child.clone(), tree, depth + 1, None);
+                                self.draw_file_node(ui, child.content_hash, tree, depth + 1, None);
                             }
                         });
                 }

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 +1,19 @@
+use std::io::Read;
+
+use bytes::Bytes;
+use p256::EncodedPoint;
 use p256::ecdsa::{
     Signature, SigningKey, VerifyingKey,
     signature::{Signer, Verifier},
 };
 use rand_core::OsRng;
+use reqwest::Error;
+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,
@@ -40,16 +47,119 @@ pub fn formatPubKey(crypto_pair: CryptographicSignature) -> String  {
     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?;
 
-    #[test]
+    match res.error_for_status_ref() {
-    fn creating_cryptographic_signature() {
+        Ok(_) => {
-        let username = String::from("quoicoubeh");
+            println!("Successfully retreived the peers key.");
-        let crypto_pair = CryptographicSignature::new(username);
+            let body: Bytes = res.bytes().await?;
-        let formatted_pubkey =formatPubKey(crypto_pair);
+            let slice: &[u8] = body.as_ref();
-        println!("pubkey : {}",formatted_pubkey);
+            let body_bytes: &[u8; 64] = slice.try_into().expect("size error");
+            let received_key = convert_verifyingkey(body_bytes);
+            Ok(received_key)
+        }
+        Err(e) => {
+            eprintln!(
+                "Failed to get the peers key from the server. Status: {}",
+                res.status()
+            );
+            Err(e)
+        }
     }
 }
+
+fn convert_verifyingkey(raw_xy: &[u8; 64]) -> VerifyingKey {
+    let mut sec1 = [0u8; 65];
+    sec1[0] = 0x04;
+    sec1[1..].copy_from_slice(raw_xy);
+
+    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

@@ -80,7 +80,7 @@ impl MerkleTree {
     }
 }
 
-fn generate_random_file_node(
+/*fn generate_random_file_node(
     storage: &mut HashMap<NodeHash, MerkleNode>,
 ) -> Result<NodeHash, String> {
     let mut rng = rng();
@@ -110,9 +110,9 @@ fn generate_random_file_node(
         storage.insert(hash, node);
         Ok(hash)
     }
-}
+}*/
 
-fn generate_random_directory_node(
+/*fn generate_random_directory_node(
     depth: u32,
     max_depth: u32,
     storage: &mut HashMap<NodeHash, MerkleNode>,
@@ -172,7 +172,7 @@ fn generate_random_directory_node(
         storage.insert(hash, node);
         Ok(hash)
     }
-}
+}*/
 
 #[derive(Debug, Clone)]
 pub struct ChunkNode {
@@ -208,7 +208,7 @@ impl ChunkNode {
 // Helper struct
 #[derive(Debug, Clone)]
 pub struct DirectoryEntry {
-    pub filename: [u8; FILENAME_HASH_SIZE],
+    pub filename: Vec<u8>,
     pub content_hash: NodeHash,
 }
 
@@ -240,7 +240,7 @@ pub struct BigNode {
 }
 
 impl BigNode {
-    pub fn new(children_hashes: Vec<NodeHash>) -> Result<Self, String> {
+    /*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!(
@@ -249,16 +249,17 @@ impl BigNode {
             ));
         }
         Ok(BigNode { children_hashes })
-    }
+    }*/
 }
 
 #[derive(Debug, Clone)]
 pub struct BigDirectoryNode {
-    pub children_hashes: Vec<NodeHash>,
+    //pub children_hashes: Vec<NodeHash>,
+    pub children_hashes: Vec<DirectoryEntry>,
 }
 
 impl BigDirectoryNode {
-    pub fn new(children_hashes: Vec<NodeHash>) -> Result<Self, String> {
+    /*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!(
@@ -267,6 +268,14 @@ impl BigDirectoryNode {
             ));
         }
         Ok(BigDirectoryNode { children_hashes })
+    }*/
+    pub fn new(entries: Vec<DirectoryEntry>) -> Result<Self, String> {
+        if entries.len() > MAX_DIRECTORY_ENTRIES {
+            return Err(format!("Directory exceeds {} bytes", entries.len()));
+        }
+        Ok(BigDirectoryNode {
+            children_hashes: entries,
+        })
     }
 }
 
@@ -301,14 +310,14 @@ impl MerkleNode {
             }
             MerkleNode::BigDirectory(node) => {
                 for hash in &node.children_hashes {
-                    bytes.extend_from_slice(hash);
+                    bytes.extend_from_slice(&hash.content_hash);
                 }
             }
         }
         bytes
     }
 
-    pub fn generate_random_tree(
+    /*pub fn generate_random_tree(
         max_depth: u32,
     ) -> Result<(NodeHash, HashMap<NodeHash, MerkleNode>), String> {
         let mut storage = HashMap::new();
@@ -317,9 +326,9 @@ impl MerkleNode {
         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>) {
+    /*pub fn generate_base_tree() -> (NodeHash, HashMap<NodeHash, MerkleNode>) {
         let mut res = HashMap::new();
 
         let node1 = MerkleNode::Chunk(ChunkNode::new_random());
@@ -369,5 +378,5 @@ impl MerkleNode {
         res.insert(root_hash, root);
 
         (root_hash, res)
-    }
+    }*/
 }

client-network/src/datum_parsing.rs

@@ -0,0 +1,96 @@
+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;
+
+fn parse_received_datum(recevied_datum: Vec<u8>, datum_length: usize, mut tree: MerkleTree) {
+    if datum_length > recevied_datum.len() {
+        return;
+    }
+    if datum_length < 32 + 64 {
+        return;
+    }
+    let hash_name: [u8; 32] = recevied_datum[..32].try_into().expect("error");
+    let sigstart = datum_length - 64;
+    let value = &recevied_datum[32..sigstart];
+    let value_slice = value.to_vec();
+    let signature: [u8; 32] = recevied_datum[sigstart..datum_length]
+        .try_into()
+        .expect("Taille incorrecte");
+    let datum_type = value_slice[0];
+    match datum_type {
+        CHUNK => {
+            tree.data.insert(
+                hash_name,
+                MerkleNode::Chunk(crate::ChunkNode { data: value_slice }),
+            );
+        }
+        DIRECTORY => {
+            let nb_entries = value_slice[1];
+            let mut dir_entries = Vec::new();
+            let mut offset = 1 as usize;
+            for i in 0..nb_entries {
+                offset = (offset as u8 + 64 * i) as usize;
+                let name = &recevied_datum[offset..offset + 32];
+                let mut hash = [0u8; 32];
+                hash.copy_from_slice(&recevied_datum[offset + 32..offset + 64]);
+                // envoyer un datum request
+                dir_entries.push(DirectoryEntry {
+                    filename: name.to_vec(),
+                    content_hash: hash,
+                });
+            }
+
+            let current = DirectoryNode::new(dir_entries);
+            match current {
+                Ok(current_node) => {
+                    tree.data
+                        .insert(hash_name, MerkleNode::Directory(current_node));
+                }
+                Err(e) => {
+                    println!("{}", e);
+                }
+            }
+        }
+        BIG => {
+            let chlidren: Vec<NodeHash> = Vec::new();
+            tree.data.insert(
+                hash_name,
+                MerkleNode::Big(crate::BigNode {
+                    children_hashes: chlidren,
+                }),
+            );
+        }
+        BIGDIRECTORY => {
+            let nb_entries = value_slice[1];
+            let mut dir_entries = Vec::new();
+            let mut offset = 1 as usize;
+            for i in 0..nb_entries {
+                offset = (offset as u8 + 64 * i) as usize;
+                let name = &recevied_datum[offset..offset + 32];
+                let mut hash = [0u8; 32];
+                hash.copy_from_slice(&recevied_datum[offset + 32..offset + 64]);
+                // envoyer un datum request
+                dir_entries.push(DirectoryEntry {
+                    filename: name.to_vec(),
+                    content_hash: hash,
+                });
+            }
+
+            let current = BigDirectoryNode::new(dir_entries);
+            match current {
+                Ok(current_node) => {
+                    tree.data
+                        .insert(hash_name, MerkleNode::BigDirectory(current_node));
+                }
+                Err(e) => {
+                    println!("{}", e);
+                }
+            }
+        }
+        _ => {}
+    }
+}

client-network/src/lib.rs

@@ -1,35 +1,154 @@
-mod data;
-mod protocol;
 mod cryptographic_signature;
-mod registration;
+mod data;
+mod datum_parsing;
+mod message_handling;
+mod messages_channels;
 mod messages_structure;
+mod peers_refresh;
+mod registration;
+mod server_communication;
+
+use crate::{
+    cryptographic_signature::CryptographicSignature,
+    message_handling::EventType,
+    messages_channels::{MultipleSenders, start_receving_thread},
+    messages_structure::{
+        NATTRAVERSALREQUEST, NATTRAVERSALREQUEST2, ROOTREQUEST, construct_message,
+    },
+    peers_refresh::HandshakeHistory,
+    registration::{parse_addresses, perform_handshake, register_with_the_server},
+    server_communication::{generate_id, get_peer_list},
+};
+use std::{
+    io::Error,
+    net::{IpAddr, Ipv4Addr, UdpSocket},
+};
+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_senders: Arc<MultipleSenders>,
+    server_name: Arc<Mutex<String>>,
+    handshake_peers: Arc<HandshakeHistory>,
+}
+
+use bytes::Bytes;
+use p256::pkcs8::der::pem::Base64Encoder;
+
+impl P2PSharedData {
+    pub fn new(
+        username: String,
+        cmd_tx: crossbeam_channel::Sender<NetworkEvent>,
+    ) -> Result<P2PSharedData, Error> {
+        let messages_list = HashMap::<i32, EventType>::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 senders = MultipleSenders::new(1, &shared_socket, cmd_tx);
+        let shared_senders = Arc::new(senders);
+        let server_name = 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_senders: shared_senders,
+            server_name: server_name,
+            handshake_peers: handhsake_peers,
+        })
+    }
+    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 servername(&self) -> String {
+        let guard = self.server_name.lock().unwrap();
+        guard.to_string()
+    }
+    pub fn set_servername(&self, new: String) {
+        let mut guard = self.server_name.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 cryptopair_ref(&self) -> &CryptographicSignature {
+        &*self.shared_cryptopair
+    }
+    pub fn handshake_ref(&self) -> &HandshakeHistory {
+        &*self.handshake_peers
+    }
+
+    pub fn messages_list_ref(&self) -> &Mutex<HashMap<i32, EventType>> {
+        &*self.shared_messageslist
+    }
+
+    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);
+    }
+}
 
 /// Messages sent to the Network thread by the GUI.
 pub enum NetworkCommand {
-    ConnectToServer(String), // ServerIP
+    ConnectToServerPut(String, String), // ServerIP
+    ServerHandshake(String, String),    // ServerName
     FetchPeerList(String),              // ServerIP
     RegisterAsPeer(String),
-    Ping(),
+    Ping(String),
-    ConnectPeer(String),     // IP:PORT
+    NatTraversal(String, String),
+    ConnectPeer((String, bool)), // IP:PORT
     RequestFileTree(String),     // peer_id
     RequestDirectoryContent(String, String),
     RequestChunk(String, String),
+    Disconnect(),
+    ResetServerPeer(),
+    Discover(String, String, String),
+    GetChildren(String, String),
     // ...
 }
 
 /// Messages sent to the GUI by the Network thread.
 pub enum NetworkEvent {
-    Connected(),
+    Connected(String),
+    ConnectedHandshake(),
     Disconnected(),
-    Error(),
+    Error(String),
     PeerConnected(String),
-    PeerListUpdated(Vec<String>),
+    PeerListUpdated(Vec<(String, bool)>),
     FileTreeReceived(String, Vec<MerkleNode>), // peer_id, content
     DataReceived(String, MerkleNode),
-    FileTreeRootReceived(String, String),
+    FileTreeRootReceived(String, NodeHash),
+    HandshakeFailed(),
+    ServerHandshakeFailed(String),
     // ...
 }
 
+use std::collections::HashMap;
+
 pub use crate::data::*;
 use crossbeam_channel::{Receiver, Sender};
 use sha2::{Digest, Sha256};
@@ -52,10 +171,13 @@ 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 {
         // P2P/Networking Setup goes here
+        let handshake_history = Arc::new(Mutex::new(HandshakeHistory::new()));
+        let handshake_clone = handshake_history.clone();
 
         println!("Network executor started.");
 
@@ -64,9 +186,19 @@ 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::ServerHandshake(username, ip) => {
+                        println!("server handshake called");
+                        if let Some(sd) = shared_data.as_ref() {
+                            start_receving_thread(sd, event_tx.clone(), &handshake_clone);
+                            let res =
+                                perform_handshake(&sd, username, ip, event_tx.clone(), true).await;
+                        } 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();
@@ -74,36 +206,201 @@ 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 = {
+                                let m = handshake_clone.lock().unwrap();
+                                m.get_peer_info_username(username.clone()).cloned()
+                            };
+                            match res {
+                                Some(peerinfo) => {
+                                    // envoyer un root request
+                                    let rootrequest = construct_message(
+                                        ROOTREQUEST,
+                                        Vec::new(),
+                                        generate_id(),
+                                        sd.cryptopair_ref(),
+                                    );
+
+                                    match rootrequest {
+                                        None => {}
+                                        Some(resp_msg) => {
+                                            println!("msg_sent:{:?}", resp_msg);
+                                            sd.senders_ref().send_via(
+                                                0,
+                                                resp_msg,
+                                                peerinfo.ip.to_string(),
+                                                false,
+                                                sd.messages_list_ref(),
+                                            );
+                                        }
+                                    }
+                                }
+                                None => {
+                                    // envoyer un handshake
+                                    let res = perform_handshake(
+                                        &sd,
+                                        username,
+                                        ip,
+                                        event_tx.clone(),
+                                        false,
+                                    )
+                                    .await;
+                                }
+                            }
+                        } else {
+                            println!("no shared data");
+                        }
+                    }
+                    NetworkCommand::GetChildren(username, hash) => {
+                        // envoie un datum request au peer
+                    }
                     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));
+                                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));
+                                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) => {
+                        if ip == "" {
+                            let res = event_tx.send(NetworkEvent::Error(
+                                "Not registered to any server".to_string(),
+                            ));
+                        } 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"),
+                            }
+                        }
                         println!("[Network] FetchPeerList() called");
                     }
                     NetworkCommand::RegisterAsPeer(_) => {
                         println!("[Network] RegisterAsPeer() called");
                     }
-                    NetworkCommand::Ping() => {
+                    NetworkCommand::Ping(String) => {
                         println!("[Network] Ping() called");
                     }
+                    NetworkCommand::Disconnect() => {
+                        if let Some(sd) = shared_data.as_ref() {
+                            println!("Disconnecting: {}", &sd.cryptopair().username);
+                            shared_data = None;
+                            let res = event_tx.send(NetworkEvent::Disconnected());
+                        } 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_query =
+                                get_socket_address(sd.servername().clone(), ip.clone());
+                            let peer_addr_query = get_socket_address(username.clone(), ip.clone());
+
+                            match server_addr_query.await {
+                                Some(server_addr) => match peer_addr_query.await {
+                                    Some(peer_addr) => {
+                                        let payload = socket_addr_to_vec(server_addr);
+
+                                        print!("{:?}", payload.clone());
+
+                                        let natreq = construct_message(
+                                            NATTRAVERSALREQUEST,
+                                            server_addr.to_string().into_bytes(),
+                                            generate_id(),
+                                            &sd.cryptopair(),
+                                        );
+
+                                        sd.senders_ref().send_via(
+                                            0,
+                                            natreq.expect(
+                                                "couldnt construct message nattraversalrequest2",
+                                            ),
+                                            server_addr.to_string(),
+                                            false,
+                                            sd.messages_list_ref(),
+                                        );
+                                    }
+                                    None => {
+                                        let err_msg = format!("failed to retreive socket address")
+                                            .to_string();
+                                        let res = event_tx.send(NetworkEvent::Error(err_msg));
+                                    }
+                                },
+                                None => {
+                                    let err_msg =
+                                        format!("failed to retreive socket address").to_string();
+                                    let res = event_tx.send(NetworkEvent::Error(err_msg));
+                                }
+                            }
+                        }
+                    }
                 }
             }
 
@@ -117,3 +414,78 @@ pub fn start_p2p_executor(
         }
     })
 }
+
+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],
+    ])
+}
+
+///
+/// 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) -> Option<SocketAddr> {
+    let client = reqwest::Client::new();
+    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.");
+    } 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);
+            addresses.iter().copied().find(|a| a.is_ipv4())
+        }
+        Err(_) => None,
+    }
+}
+
+pub async fn get_possible_socket_address(username: String, ip: String) -> Vec<SocketAddr> {
+    let client = reqwest::Client::new();
+    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.");
+    } 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);
+            addresses.iter().copied().filter(|a| a.is_ipv4()).collect()
+        }
+        Err(_) => Vec::new(),
+    }
+}

client-network/src/message_handling.rs

@@ -0,0 +1,473 @@
+use crate::{
+    NetworkEvent, NodeHash,
+    cryptographic_signature::{
+        CryptographicSignature, get_peer_key, sign_message, verify_signature,
+    },
+    messages_channels::MultipleSenders,
+    messages_structure::construct_message,
+    peers_refresh::HandshakeHistory,
+    registration,
+    server_communication::generate_id,
+};
+use std::{collections::HashMap, net::SocketAddr};
+use std::{
+    net::IpAddr,
+    sync::{Arc, Mutex},
+};
+
+pub enum EventType {
+    SendRootRequest,
+}
+
+const ID: usize = 4;
+const TYPE: usize = 5;
+const LENGTH: usize = 7;
+const EXTENSIONS: usize = 4;
+const SIGNATURE: usize = 64;
+
+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>>>,
+    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<Mutex<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,
+        handhsake_history,
+        senders,
+    );
+
+    match resp {
+        None => {}
+        Some(resp_msg) => {
+            println!("msg_sent:{:?}", resp_msg);
+            senders.send_via(
+                0,
+                resp_msg,
+                ip.to_string(),
+                is_resp_to_server_handshake,
+                messages_list,
+            );
+        }
+    }
+
+    // Lock the mutex to access the HashMap
+    /*let list = messages_list.lock().unwrap();
+
+    let eventtype = list.get(&id); // Clone the enum so we can release the lock if needed
+    match eventtype {
+        Some(EventType::ServerHelloReply) => {
+            /*registration::register_ip_addresses(
+                 crypto_pair,
+                 socket_addr.to_string(),
+                 senders,
+                 &messages_list, // Pass the mutable reference inside the lock
+            546,
+             );*/
+        }
+        Some(_) => print!("Not implemented"),
+        None => {
+            let message_type = recevied_message[4];
+
+            // Handle handshake
+            if message_type == 1 {
+                let mut resp_to_serv = false;
+                println!("verify the signature");
+                let parsed_received_message = HandshakeMessage::parse(recevied_message.to_vec());
+                let received_name = String::from_utf8(parsed_received_message.name).expect("error");
+                let peer_pubkey = tokio::runtime::Runtime::new()
+                    .unwrap()
+                    .block_on(get_peer_key(&received_name))
+                    .expect("failed to retrieve public key");
+
+                if received_name == server_name.to_string() {
+                    resp_to_serv = true;
+                }
+
+                if !verify_signature(peer_pubkey, recevied_message) {
+                    println!(
+                        "incorrect signature from given peer: {}, ignoring message {}",
+                        &received_name, id
+                    );
+                } else {
+                    // verify if this is a server handshake request
+                    let username_size = crypto_pair.username.len();
+                    let hello_handshake = HandshakeMessage::helloReply(
+                        id as u32,
+                        username_size as u16 + 4,
+                        crypto_pair.username.clone(),
+                    );
+                    //HandshakeMessage::display(&hello_handshake);
+                    let hello_handshake_serialized = hello_handshake.serialize();
+                    let message_signed = sign_message(crypto_pair, &hello_handshake_serialized);
+                    senders.send_via(0, message_signed, socket_addr.to_string(), resp_to_serv);
+                    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);
+                        }
+                    }
+                }
+            }
+            print!("Message not found for ID: {}", id)
+        }
+    }*/
+}
+
+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>>>,
+    handhsake_history_mutex: &Arc<Mutex<HandshakeHistory>>,
+    senders: &MultipleSenders,
+) -> Option<Vec<u8>> {
+    let mut handhsake_history = handhsake_history_mutex.lock().unwrap();
+    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];
+
+    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 | NODATUM | NATTRAVERSALREQUEST | NATTRAVERSALREQUEST2 => {
+            let ilength = u16::from_be_bytes(length_bytes);
+            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);
+                        }
+                        _ => {}
+                    }
+                    let signature: [u8; SIGNATURE] = received_message
+                        [LENGTH + msg_length..LENGTH + msg_length + SIGNATURE]
+                        .try_into()
+                        .expect("Taille incorrecte");
+                    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 => {
+            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
+        //
+        // envoie un OK
+        PING => {
+            constructed_message = construct_message(OK, Vec::new(), id, crypto_pair);
+        }
+        //
+        // OK
+        //
+        // rien ?
+        // si NATTRAVERSALREQUEST alors
+        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_via(
+                0,
+                natreq2.expect("couldnt construct message nattraversalrequest2"),
+                address,
+                false,
+                &messages_list,
+            );
+        }
+
+        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];
+            let address = String::from_utf8(received_address.to_vec()).expect("wrong name");
+
+            let pingreq = construct_message(PING, Vec::new(), id, crypto_pair);
+
+            senders.send_via(
+                0,
+                pingreq.expect("couldnt construct message ping request"),
+                address,
+                false,
+                &messages_list,
+            );
+        }
+        //
+        // ERROR
+        //
+        // affiche un msg d'erreur
+        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));
+            } else {
+                let err_msg = format!("Error received from peer {} : N/A", ip,);
+                let _ = cmd_tx_clone.send(NetworkEvent::Error(err_msg));
+            }
+        }
+        // HELLO
+        //
+        // envoie une hello reply
+        //
+        HELLO => {
+            let mut payload = Vec::new();
+
+            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 a la liste des peers handshake
+        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 guard = messages_list.lock().expect("Échec du verrouillage");
+            let res = guard.get(&id);
+            match res {
+                Some(ev) => {
+                    match ev {
+                        EventType::SendRootRequest => {
+                            // envoyer la root request
+                            let rootrequest = construct_message(
+                                ROOTREQUEST,
+                                Vec::new(),
+                                generate_id(),
+                                crypto_pair,
+                            );
+                            return rootrequest;
+                        }
+                    }
+                }
+                None => {}
+            }
+        }
+        //
+        // ROOTREQUEST
+        //
+        // envoie un root reply
+        //
+        // ROOTREPLY
+        //
+        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) => {
+                    // 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")
+                }
+                None => {
+                    eprintln!("no peers found");
+                }
+            }
+        }
+        //
+        // DATUMREQUEST
+        //
+        // envoie le datum
+        //
+        // NODATUM
+        //
+        // affiche un msg d'erreur
+        //
+        // DATUM
+        //
+        // parcourt le directory recu ou le big directory et renvoie une DATUMREQUEST pour chaque
+        // directory ou big directory lu
+        //
+        // NATTRAVERSALREQUEST
+        //
+        // repond OK et envoie un NATTRAVERSALREQUEST2 au pair B
+        //
+        // NATTRAVERSALREQUEST2
+        //
+        // envoie OK à S puis envoie un ping à S
+
+        // PING
+        //
+        // envoie un OK
+        //
+        // OK
+        //
+        // si NATTRAVERSALREQUEST alors
+        //
+        // ERROR
+        //
+        // affiche un msg d'erreur
+        //
+        // HELLO
+        //
+        // envoie une hello reply
+        //
+        // HELLOREPLY
+        //
+        // envoie un root request
+        //
+        // ROOTREQUEST
+        //
+        // envoie un root reply
+        //
+        // ROOTREPLY
+        //
+        // envoie un datum request
+        //
+        // DATUMREQUEST
+        //
+        // envoie le datum
+        //
+        // NODATUM
+        //
+        // affiche un msg d'erreur
+        //
+        // DATUM
+        //
+        // parcourt le directory recu ou le big directory et renvoie une DATUMREQUEST pour chaque
+        // directory ou big directory lu
+        //
+        // NATTRAVERSALREQUEST
+        //
+        // repond OK et envoie un NATTRAVERSALREQUEST2 au pair B
+        //
+        // NATTRAVERSALREQUEST2
+        //
+        // envoie OK à S puis envoie un ping à S
+        _ => return None,
+    };
+    constructed_message
+}

client-network/src/messages_channels.rs

@@ -0,0 +1,300 @@
+use crate::P2PSharedData;
+use crate::cryptographic_signature::CryptographicSignature;
+use crate::message_handling::EventType;
+use crate::message_handling::handle_recevied_message;
+use crate::peers_refresh::HandshakeHistory;
+use std::collections::HashMap;
+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::{Duration, Instant};
+
+use crate::NetworkEvent;
+
+pub struct MultipleSenders {
+    senders: Vec<Sender<Message>>,
+    response_channel: crossbeam_channel::Sender<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: Instant,
+}
+
+impl MultipleSenders {
+    /*pub fn new(num_channels: usize, socket: &Arc<UdpSocket>) -> Self {
+        let mut senders = Vec::new();
+
+        // Wrap the socket in an Arc so it can be shared across threads
+
+        for i in 0..num_channels {
+            let (tx, rx) = mpsc::channel::<Message>();
+
+            // Clone the Arc (this just bumps the reference count, it doesn't copy the socket)
+            let sock_clone = Arc::clone(&socket);
+
+            senders.push(tx);
+
+            thread::spawn(move || {
+                println!("Canal d'envoi {} prêt", i);
+
+                for msg in rx {
+                    // Use the cloned Arc inside the thread
+                    if let Err(e) = sock_clone.send_to(&msg.payload, &msg.address) {
+                        eprintln!(
+                            "Erreur d'envoi sur canal {}: {}, address: {}",
+                            i, e, &msg.address
+                        );
+                    } else {
+                        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
+                        );
+                    }
+                }
+            });
+        }
+
+        MultipleSenders { senders }
+    }*/
+
+    pub fn new(
+        num_channels: usize,
+        socket: &Arc<UdpSocket>,
+        cmd_tx: crossbeam_channel::Sender<NetworkEvent>,
+    ) -> Self {
+        let mut senders = Vec::new();
+
+        for i in 0..num_channels {
+            let (tx, rx) = mpsc::channel::<Message>();
+            let sock_clone = Arc::clone(&socket);
+            let cmd_tx_clone = cmd_tx.clone();
+
+            senders.push(tx);
+
+            thread::spawn(move || {
+                println!("Canal d'envoi {} prêt", i);
+
+                let mut queue: VecDeque<RetryMessage> = VecDeque::new();
+                let max_attempts = 5;
+
+                loop {
+                    // Priorité aux messages en attente prêts à être réessayés
+                    if let Some(front) = queue.front() {
+                        if front.next_try <= Instant::now() {
+                            // On prend le message de la queue
+                            let mut item = queue.pop_front().unwrap();
+                            match sock_clone.send_to(&item.msg.payload, &item.msg.address) {
+                                Ok(_) => {
+                                    if (&item).msg.is_resp_to_server_handshake {
+                                        let res =
+                                            cmd_tx_clone.send(NetworkEvent::ConnectedHandshake());
+                                    }
+                                    let message_id: [u8; 4] =
+                                        item.msg.payload[0..4].try_into().expect("size error");
+                                    let id = i32::from_be_bytes(message_id);
+                                    let message_type = item.msg.payload[4];
+                                    println!(
+                                        "Message {0} de type {1} envoyé à {2} par le canal {3} (retry {4})",
+                                        id, message_type, item.msg.address, i, item.attempts
+                                    );
+                                }
+                                Err(e) => {
+                                    item.attempts += 1;
+                                    if item.attempts >= max_attempts {
+                                        let str = format!(
+                                            "Abandon du message après {} tentatives sur canal {}: {}, address: {}",
+                                            item.attempts, i, e, item.msg.address
+                                        );
+                                        if (&item).msg.is_resp_to_server_handshake {
+                                            let res = cmd_tx_clone
+                                                .send(NetworkEvent::ServerHandshakeFailed(str));
+                                        }
+                                    } else {
+                                        // Backoff exponentiel simple
+                                        let backoff = Duration::from_millis(
+                                            2000u64.saturating_pow(item.attempts as u32),
+                                        );
+                                        item.next_try = Instant::now() + backoff;
+                                        eprintln!(
+                                            "Erreur d'envoi sur canal {}: {}, reprogrammation dans {:?}, tentative {}",
+                                            i, e, backoff, item.attempts
+                                        );
+                                        queue.push_front(item); // remettre en tête pour réessayer plus tôt
+                                    }
+                                }
+                            }
+                            continue;
+                        }
+                    }
+
+                    // Si aucun retry prêt, on bloque sur rx avec timeout court, pour pouvoir traiter les timers
+                    match rx.recv_timeout(Duration::from_millis(200)) {
+                        Ok(msg) => {
+                            // On tente d'envoyer immédiatement
+                            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: {} -- mise en queue pour retry",
+                                        i, e, &msg.address
+                                    );
+                                    let retry = RetryMessage {
+                                        msg,
+                                        attempts: 1,
+                                        next_try: Instant::now() + Duration::from_millis(100),
+                                    };
+                                    queue.push_back(retry);
+                                }
+                            }
+                        }
+                        Err(mpsc::RecvTimeoutError::Timeout) => {
+                            // Permet de vérifier la queue à nouveau
+                            continue;
+                        }
+                        Err(mpsc::RecvTimeoutError::Disconnected) => {
+                            // Le sender a été fermé ; vider la queue et sortir
+                            eprintln!(
+                                "Sender fermé pour le canal {}, fermeture du thread d'envoi",
+                                i
+                            );
+                            break;
+                        }
+                    }
+                }
+            });
+        }
+
+        MultipleSenders {
+            senders,
+            response_channel: cmd_tx.clone(),
+        }
+    }
+
+    /// 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 start_receving_thread(
+        socket: &Arc<UdpSocket>,
+        messages_list: &Arc<HashMap<i32, EventType>>,
+        crypto_pair: &Arc<CryptographicSignature>,
+        socket_addr: SocketAddr,
+        senders: &Arc<MultipleSenders>,
+    ) {
+        let sock_clone = Arc::clone(socket);
+        let cryptopair_clone = Arc::clone(crypto_pair);
+        let senders_clone = Arc::clone(senders);
+
+        let messages_clone = Arc::clone(messages_list);
+        thread::spawn(move || {
+            let mut buf = [0u8; 1024];
+
+            loop {
+                match sock_clone.recv_from(&mut buf) {
+                    Ok((amt, src)) => {
+                        handle_recevied_message(
+                            &messages_clone,
+                            &buf.to_vec(),
+                            &cryptopair_clone,
+                            &socket_addr,
+                            &senders_clone,
+                        );
+                        println!("Reçu {} octets de {}: {:?}", amt, src, &buf[..amt]);
+                    }
+                    Err(e) => eprintln!("Erreur de réception: {}", e),
+                }
+            }
+        });
+    }*/
+}
+
+pub fn start_receving_thread(
+    shared_data: &P2PSharedData,
+    cmd_tx: crossbeam_channel::Sender<NetworkEvent>,
+    handshake_history: &Arc<Mutex<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 servername_clone = shared_data.servername();
+
+    let handshake_clone = handshake_history.clone();
+    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,
+                        &received_data,
+                        &cryptopair_clone,
+                        &senders_clone,
+                        &servername_clone,
+                        cmd_tx.clone(),
+                        src,
+                        &handshake_clone,
+                    );
+                }
+                Err(e) => eprintln!("Erreur de réception: {}", e),
+            }
+        }
+    });
+}

client-network/src/messages_structure.rs

@@ -1,50 +1,241 @@
-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 => {
+            message.extend_from_slice(&payload.len().to_be_bytes());
+            message.extend_from_slice(&payload);
+            return Some(message);
+        }
+        ROOTREPLY | NODATUM | DATUM | NATTRAVERSALREQUEST => {
+            println!("payload:{:?}", &payload);
+            message.extend_from_slice(&(payload.len() as u16).to_be_bytes());
+            message.extend_from_slice(&payload);
+            println!("payload:{:?}", &message);
+            let signature = sign_message(crypto_pair, &message);
+            message.extend_from_slice(&signature);
+            return Some(message);
+        }
+
+        _ => {}
+    }
+    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 +1,160 @@
+// 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
+
+use std::{
+    collections::{HashMap, VecDeque},
+    net::{AddrParseError, Ipv4Addr, SocketAddr},
+    ops::Add,
+    process::Command,
+    sync::{Arc, Mutex},
+    thread,
+    time::{self, Duration, SystemTime},
+};
+
+use crate::NetworkEvent;
+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,
+}
+
+pub struct HandshakeHistory {
+    //time_k_ip_v: HashMap<u64, u64>,
+    username_k_peerinfo_v: HashMap<String, PeerInfo>,
+    ip_k_peerinfo_v: HashMap<String, PeerInfo>,
+}
+
+impl HandshakeHistory {
+    pub fn new() -> HandshakeHistory {
+        HandshakeHistory {
+            //time_k_ip_v: HashMap::new(),
+            //ip_k_peerinfo_v: HashMap::new(),
+            username_k_peerinfo_v: HashMap::new(),
+            ip_k_peerinfo_v: HashMap::new(),
+        }
+    }
+
+    /*pub fn update_handshake(&self) {
+        let hashmap_shared = Arc::new(self.username_k_peerinfo_v);
+        thread::spawn(move || {
+            let selfhashmap = hashmap_shared.clone();
+            loop {
+                for peer in selfhashmap.keys() {
+                    let peer_ip = selfhashmap.get(peer);
+                    // send ping
+                }
+                let mut child = Command::new("sleep").arg("10").spawn().unwrap();
+                let _result = child.wait().unwrap();
+            }
+        });
+    }*/
+
+    pub fn get_peer_info_username(&self, username: String) -> Option<&PeerInfo> {
+        self.username_k_peerinfo_v.get(&username).clone()
+    }
+
+    pub fn get_peer_info_ip(&self, ip: String) -> Option<&PeerInfo> {
+        self.ip_k_peerinfo_v.get(&ip).clone()
+    }
+
+    pub fn update_handshake(&self) {
+        // clone the map so we own it (cheap if PeerInfo is Clone)
+        let map_clone: Arc<HashMap<String, PeerInfo>> =
+            Arc::new(self.username_k_peerinfo_v.clone());
+        //let map_ip_clone: Arc<HashMap<String, PeerInfo>> = Arc::new(self.ip_k_peerinfo_v.clone());
+        let map_for_thread = Arc::clone(&map_clone);
+        thread::spawn(move || {
+            loop {
+                // Arc<HashMap<..>> derefs to &HashMap so these reads work
+                for (peer, peerinfo) in map_for_thread.iter() {
+                    // send ping to peerinfo
+                }
+                thread::sleep(Duration::from_secs(10));
+            }
+        });
+    }
+
+    pub fn update_peer_info(&mut 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,
+                    };
+                    self.ip_k_peerinfo_v.insert(ip, new_peer_info.clone());
+                    self.username_k_peerinfo_v.insert(username, new_peer_info);
+                }
+                Err(e) => eprintln!("parse error: {}", e),
+            },
+            None => {
+                eprintln!("no peer info found in hashmap")
+            }
+        }
+    }
+
+    pub fn add_new_handshake(&mut self, hash: VerifyingKey, username: String, ip: SocketAddr) {
+        let peerinfo = PeerInfo {
+            username: username.clone(),
+            pubkey: hash,
+            ip,
+        };
+        self.username_k_peerinfo_v
+            .insert(username, peerinfo.clone());
+        self.ip_k_peerinfo_v
+            .insert(ip.to_string(), peerinfo.clone());
+    }
+}
+
+pub fn perform_discover(
+    username: String,
+    hash: String,
+    sd: &P2PSharedData,
+    server_ip: String,
+    event_tx: Sender<NetworkEvent>,
+) {
+    // first, sends handshake
+    if hash == "root" {
+        perform_handshake(sd, username, server_ip, event_tx, false);
+        /*if let Some(data) = construct_message(
+            messages_structure::ROOTREQUEST,
+            Vec::new(),
+            generate_id(),
+            sd.cryptopair_ref(),
+        ) {
+            if let Some(peerinfo) = sd.handshake_ref() {
+                sd.senders_ref()
+                    .send_via(0, data, peerinfo.ip.to_string(), false);
+            }
+        }*/
+    } else {
+        // envoyer un datum request
+    }
+}
+
+#[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

@@ -1,36 +1,110 @@
-use crate::cryptographic_signature::{CryptographicSignature, formatPubKey};
+use bytes::Bytes;
+
+use crate::NetworkEvent;
+use crate::P2PSharedData;
+use crate::cryptographic_signature::{CryptographicSignature, formatPubKey, sign_message};
+use crate::get_socket_address;
+use crate::message_handling::EventType;
+use crate::messages_channels::MultipleSenders;
+use crate::messages_structure::construct_message;
+use crate::server_communication::generate_id;
+use crossbeam_channel::{Receiver, Sender};
+use std::collections::HashMap;
+use std::net::SocketAddr;
 use std::net::UdpSocket;
+use std::str::FromStr;
+use std::sync::{Arc, Mutex};
+
 ///
-/// 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)
+    println!("register ip adresses");
-        .send()
-        .await?;
-    if res.status().is_success() {
-        println!("Successfully registered with the server.");
-    } else {
-        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");  
+        }
+        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,
+) {
+    println!("username: {}, ip: {}", username.clone(), ip.clone());
+    let crypto_pair = sd.cryptopair_ref();
+    let senders = sd.senders_ref();
+    let messages_list = sd.messages_list_ref();
+    let id = generate_id();
+    let server_addr_query = get_socket_address(username.clone(), ip.clone());
+    match server_addr_query.await {
+        Some(sockaddr_bytes) => {
+            sd.set_servername(username);
+            // first: &SocketAddr
+            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);
+            match hello_handshake {
+                Some(handshake_message) => {
+                    senders.send_via(
+                        0,
+                        handshake_message,
+                        sockaddr_bytes.to_string(),
+                        is_server_handshake,
+                        messages_list,
+                    );
+                }
+                None => {}
+            }
+        }
+        None => {
+            let err_msg = format!("failed to retreive socket address:").to_string();
+            let res = event_tx.send(NetworkEvent::Error(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
 }
 
@@ -39,12 +113,32 @@ 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);
         }
+    }*/
+
+    /*///
+    /// 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)
+}

todo.md

@@ -1,20 +1,32 @@
-# Todo : 
+# Todo
+
 ## peer discovery
+
+## handshake
+
+# Todo
+
+## peer discovery
+
 - get rsquest to the uri /peers/
 
 ## registration with the server
+
 - generation of the cryptographic key OK
 - put request to the uri (check if the peer is already connected) OK
-- udp handshakes
+- udp handshakes OK
-- get request to the uri /peers/key to get the public key of a peer
+- get request to the uri /peers/key to get the public key of a peer OK
-- get request to the uri /peers/key/addresses
+- get request to the uri /peers/key/addresses OK
 
 ## handshake
-- handshake structure
+
+- handshake structure OK
+
 - 5min timeout after handshake
 - matain connection every 4 min
 
 ## data transfer
+
 - request structure
 - root/root reply structure
 - datum/nodatum and datum structures
@@ -22,12 +34,40 @@
 - setting in gui to act as a relay
 - chunk, directory, big, bigdirectory structures
 
+## fonctionnalités application
+
+## nat traversal
+
+- make hello and helloreply messages set the first extension bit to announce that peer is available for nat traversal
+- implement actual nat traversal requests
+- implement nat traversal :
+  - if hello/helloreply doesnt work with a peer, find a peer that supports nat traversal (server in priority) then begin protocol
+
 fonctionnalités :
 
-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
+choisir le nombre de canaux
+
+handshake server DOING
+se deconnecter du réseau DOING
+
+## autre
+
+socket ipv6
+
+# FAIT
+
+- 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
+- get request to the uri /peers/key to get the public key of a peer OK
+- get request to the uri /peers/key/addresses OK
+- udp handshakes OK
+- handshake structure OK
+- s'enregistrer avec le serveur OK
+- generer une clé publique OK
+- verifier signature OK
+- 2 channels -> un pour envoyer et un pour recevoir OK