Fix VideoTile bug and improve screen sharing

Cargo.toml

@@ -15,4 +15,4 @@ tracing = "0.1.41"
 tracing-subscriber = "0.3.19"
 bincode = "1.3.3"
 futures = "0.3.31"
-shared = { path = "../shared" }
+shared = { path = "./shared" }

README.md

@@ -0,0 +1,71 @@
+# Meet Server
+
+The high-performance signaling and media relay server for the Meet application. Built with **Rust**, **Axum**, and **Tokio**.
+
+## Features
+- **Signaling**: WebSocket-based room management and peer discovery.
+- **Media Relay**: Custom UDP protocol for low-latency video and screen sharing.
+- **Architecture**: Asynchronous, localized state management using `DashMap`.
+
+## Prerequisites
+- **Rust**: Latest stable version. Install via [rustup.rs](https://rustup.rs).
+- **Build Tools**: `build-essential` (Ubuntu) or `Development Tools` group (Fedora/RHEL).
+
+## Installation
+
+1.  **Clone the Repository**:
+    ```bash
+    git clone <your-server-repo-url>
+    cd server
+    ```
+
+2.  **Verify Shared Crate**:
+    Ensure the `shared` directory exists in the root. This contains protocol definitions used by both client (logic port) and server.
+    ```bash
+    ls -F shared/
+    ```
+
+3.  **Build**:
+    ```bash
+    cargo build --release
+    ```
+    The binary will be located at `target/release/server`.
+
+## Running the Server
+
+### Ports
+- **TCP/WebSocket**: 6000 (Bind: `0.0.0.0:6000`)
+- **UDP (Media)**: 4000 (Bind: `0.0.0.0:4000`)
+
+### Local Development
+```bash
+cargo run
+```
+Runs on `0.0.0.0:6000` (HTTP/WS) and `0.0.0.0:4000` (UDP).
+
+### Production Deployment
+1.  **Run the Binary**:
+    ```bash
+    ./target/release/server
+    ```
+2.  **Firewall**:
+    Ensure **TCP 6000** and **UDP 4000** are open.
+    ```bash
+    # Fedora/CentOS
+    sudo firewall-cmd --add-port=6000/tcp --permanent
+    sudo firewall-cmd --add-port=4000/udp --permanent
+    sudo firewall-cmd --reload
+
+    # Ubuntu/Debian (UFW)
+    sudo ufw allow 6000/tcp
+    sudo ufw allow 4000/udp
+    ```
+3.  **Systemd (Optional)**:
+    Create a service file `/etc/systemd/system/meet-server.service` to keep it running.
+
+## Project Structure
+- `src/main.rs`: Entry point. Sets up Axum router and spawns the UDP listener.
+- `src/handlers.rs`: WebSocket handlers for joining rooms, signaling, and chat.
+- `src/udp.rs`: The core UDP packet handling loop. Manages media relaying.
+- `src/state.rs`: Shared application state (Rooms, Peers).
+- `shared/`: Local crate containing shared data structures (`Packet` headers, `MediaType` enums).

shared/.gitignore

@@ -0,0 +1 @@
+/target

shared/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "shared"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+bincode = "1.3.3"
+serde = { version = "1.0.228", features = ["derive"] }

shared/src/lib.rs

@@ -0,0 +1,80 @@
+use serde::{Deserialize, Serialize};
+
+pub type UserId = u32; // Unique identifier for a user within a room
+pub type StreamId = u16; // Typically mapped to User + Media Source
+
+#[derive(Debug, Serialize, Deserialize, Clone, Copy, PartialEq, Eq, Hash)]
+#[repr(u8)]
+pub enum MediaType {
+    Audio = 0,
+    Video = 1,
+    Screen = 2,
+    Command = 3, // For handshake/keepalive
+    Unknown = 255,
+}
+
+/// UDP Packet Header (fixed size binary struct)
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct PacketHeader {
+    pub version: u8, // Protocol version (v1)
+    pub media_type: MediaType,
+    pub user_id: UserId, // Identifies the source user (was stream_id)
+    pub sequence: u32, // User-defined sequence number (for reordering/loss)
+    pub timestamp: u32, // RTP-like timestamp
+    pub fragment_index: u16, // If packet is fragmented (0 if not)
+    pub fragment_count: u16, // Total fragments (1 if not)
+    pub flags: u8, // Bitmask: 0x01 = Keyframe, etc.
+}
+
+pub const FLAG_KEYFRAME: u8 = 0x01;
+
+/// Signaling Messages (WebSocket - JSON)
+#[derive(Debug, Serialize, Deserialize, Clone)]
+#[serde(tag = "type", content = "data")]
+pub enum ControlMsg {
+    /// Client -> Server: Request to join a room
+    Join {
+        room_code: String,
+        display_name: String,
+    },
+    /// Server -> Client: Join success
+    Joined {
+        self_id: UserId,
+        room_code: String,
+        peers: Vec<PeerInfo>,
+    },
+    /// Server -> Client: New peer joined
+    PeerJoined {
+        user_id: UserId,
+        display_name: String,
+    },
+    /// Server -> Client: Peer left
+    PeerLeft {
+        user_id: UserId,
+    },
+    /// Client -> Server: Update stream status (e.g. camera on/off)
+    UpdateStream {
+        user_id: UserId,
+        stream_id: StreamId,
+        active: bool,
+        media_type: MediaType,
+    },
+    /// Client <-> Server: Chat message
+    ChatMessage {
+        user_id: UserId,
+        display_name: String,
+        message: String,
+        timestamp: u64,
+    },
+    /// General Error
+    Error {
+        message: String,
+    },
+}
+
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct PeerInfo {
+    pub user_id: UserId,
+    pub display_name: String,
+    // Could include active streams etc.
+}

src/main.rs

@@ -33,7 +33,7 @@ async fn main() -> anyhow::Result<()> {
         .route("/ws", get(ws_handler))
         .with_state(state);
 
-    let addr = SocketAddr::from(([0, 0, 0, 0], 5000));
+    let addr = SocketAddr::from(([0, 0, 0, 0], 6000));
     info!("HTTP/WS Server listening on {}", addr);
     
     let listener = tokio::net::TcpListener::bind(addr).await?;

src/udp.rs

@@ -21,6 +21,7 @@ pub async fn run_udp_server(state: AppState) -> anyhow::Result<()> {
         match socket.recv_from(&mut buf).await {
             Ok((len, addr)) => {
                 let data = &buf[..len];
+                info!("UDP RECV from {}: {} bytes", addr, len);
 
                 // Manually parse header (22 bytes) to match client's raw byte layout:
                 // Byte 0: version (u8)
@@ -60,7 +61,8 @@ pub async fn run_udp_server(state: AppState) -> anyhow::Result<()> {
                     match media_type {
                         MediaType::Command => {
                             // Handshake
-                            if let Ok(handshake) = bincode::deserialize::<Handshake>(payload) {
+                            match bincode::deserialize::<Handshake>(payload) {
+                                Ok(handshake) => {
                                     // Validate User in Room
                                     if let Some(room) = state.rooms.get(&handshake.room_code) {
                                         if room.peers.contains_key(&handshake.user_id) {
@@ -81,6 +83,10 @@ pub async fn run_udp_server(state: AppState) -> anyhow::Result<()> {
                                         }
                                     }
                                 }
+                                Err(e) => {
+                                    warn!("Failed to deserialize Handshake from {}: {}", addr, e);
+                                }
+                            }
                         }
                         _ => {
                             // Media Packet: Relay
@@ -100,6 +106,8 @@ pub async fn run_udp_server(state: AppState) -> anyhow::Result<()> {
                                         }
                                     }
                                 }
+                            } else {
+                                warn!("Dropping Relay Packet from unknown sender: {}", addr);
                             }
                         }
                     }