https://github.com/degitx/librats
High-performance, lightweight p2p native library for big networks
https://github.com/degitx/librats
bittorent dht encryption noise p2p peer-to-peer
Last synced: about 2 months ago
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High-performance, lightweight p2p native library for big networks
- Host: GitHub
- URL: https://github.com/degitx/librats
- Owner: DEgITx
- License: mit
- Created: 2025-07-11T23:48:35.000Z (3 months ago)
- Default Branch: master
- Last Pushed: 2025-08-13T22:44:30.000Z (about 2 months ago)
- Last Synced: 2025-08-14T00:22:45.584Z (about 2 months ago)
- Topics: bittorent, dht, encryption, noise, p2p, peer-to-peer
- Language: C++
- Homepage:
- Size: 628 KB
- Stars: 24
- Watchers: 1
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# 🐀 librats
[](LICENSE)
[](https://isocpp.org/)
[]()
**A high-performance, lightweight peer-to-peer networking library written in C++17**
librats is a modern P2P networking library designed for **superior performance** and **simplicity**. Built from the ground up in C++17, it provides enterprise-grade P2P networking capabilities with minimal overhead and maximum efficiency.
## ✨ Key Features
### **Core Architecture**
- **Native C++17** implementation for maximum performance
- **Cross-platform** support (Windows, Linux, macOS)
- **Thread-safe** design with modern concurrency patterns using `ThreadManager`
- **Zero-copy** data handling where possible
- **Automatic configuration persistence** with JSON-based settings (`config.json`)
- **Historical peer tracking** with automatic reconnection (`peers.rats`, `peers_ever.rats`)
### **Advanced Networking**
- **DHT Integration**: Direct access to the massive BitTorrent DHT network
- **mDNS Discovery**: Automatic local network peer discovery with service advertisement
- **STUN Support**: Automatic NAT traversal and public IP discovery
- **IPv4/IPv6 Dual Stack**: Full support for modern internet protocols
- **Multi-layer Discovery**: DHT (wide-area) + mDNS (local) + STUN (NAT traversal)
- **GossipSub Protocol**: Scalable publish-subscribe messaging with mesh networking
- **Message Validation**: Configurable message validation and filtering
- **Topic-based Communication**: Organized messaging with topic subscriptions
### **Comprehensive NAT Traversal**
- **ICE (Interactive Connectivity Establishment)**: RFC 8445 compliant with full candidate gathering
- **TURN Relay Support**: RFC 5766 compliant relay through TURN servers
- **Advanced STUN**: Enhanced STUN client with NAT type detection and ICE support
- **UDP/TCP Hole Punching**: Coordinated NAT traversal for maximum connectivity
- **Automatic Strategy Selection**: Choose optimal connection method based on network conditions
- **Real-time NAT Detection**: Detailed NAT behavior analysis and adaptation
### **Enterprise Security**
- **Noise Protocol Encryption**: End-to-end encryption with Curve25519 + ChaCha20-Poly1305
- **Automatic Key Management**: Keys generated, persisted, and rotated automatically
- **Mutual Authentication**: Both peers verify each other's identity
- **Perfect Forward Secrecy**: Session keys are ephemeral and secure
- **Configurable Encryption**: Enable/disable on demand with `set_encryption_enabled()`
### **Modern Developer Experience**
- **Event-Driven API**: Register message handlers with `on()`, `once()`, `off()` methods
- **JSON Message Exchange**: Built-in structured communication with callbacks
- **Promise-style Callbacks**: Modern async patterns for network operations
- **Real-time Connection Tracking**: Monitor peer states, connection quality, and NAT traversal progress
- **Comprehensive Logging**: Detailed debug information for troubleshooting
- **Custom Protocol Support**: Configure custom protocol names and versions
- **Unified API Design**: Consistent patterns across P2P messaging and pub-sub
- **Topic-based Messaging**: Subscribe to topics and publish messages with automatic routing
## 🚀 Quick Start
### Basic P2P Connection
```cpp
#include "librats.h"
int main() {
// Create client with automatic NAT traversal
librats::NatTraversalConfig nat_config;
nat_config.enable_ice = true;
nat_config.enable_turn_relay = true;
librats::RatsClient client(8080, 10, nat_config);
// Set up connection callback with NAT traversal info
client.set_advanced_connection_callback([](socket_t socket, const std::string& peer_id,
const librats::ConnectionAttemptResult& result) {
std::cout << "✅ Connected via: " << result.method
<< " in " << result.duration.count() << "ms" << std::endl;
std::cout << "📊 Local NAT: " << (int)result.local_nat_type
<< ", Remote NAT: " << (int)result.remote_nat_type << std::endl;
});
// Start with all discovery methods
client.start();
client.start_dht_discovery(); // Wide-area discovery
client.start_mdns_discovery(); // Local network discovery
client.discover_and_ignore_public_ip(); // NAT traversal setup
// Connect with automatic strategy selection
client.connect_to_peer("peer.example.com", 8081,
librats::ConnectionStrategy::AUTO_ADAPTIVE);
return 0;
}
```
### Event-Driven Message Exchange
```cpp
int main() {
// Create a rats client listening on port 8080
librats::RatsClient client(8080);
// Set up event handlers using the modern message API
client.on("chat", [](const std::string& peer_id, const nlohmann::json& data) {
std::cout << "Chat from " << peer_id << ": "
<< data.value("message", "") << std::endl;
});
client.on("file_request", [&](const std::string& peer_id, const nlohmann::json& data) {
std::string filename = data.value("filename", "");
std::cout << "File request from " << peer_id << ": " << filename << std::endl;
// Respond with file data
nlohmann::json response;
response["status"] = "found";
response["size"] = 12345;
client.send(peer_id, "file_response", response);
});
// Set up connection callbacks
client.set_connection_callback([](auto socket, const std::string& peer_id) {
std::cout << "New peer connected: " << peer_id << std::endl;
});
// Start the client with all discovery methods
client.start();
// Enable automatic peer discovery
client.start_dht_discovery(); // Wide-area discovery via DHT
client.start_mdns_discovery("my-node"); // Local network discovery
client.discover_and_ignore_public_ip(); // NAT traversal setup
// Send a message to all peers
nlohmann::json chat_msg;
chat_msg["message"] = "Hello, P2P world!";
chat_msg["timestamp"] = std::time(nullptr);
client.send("chat", chat_msg);
// Connect to a specific peer (optional)
client.connect_to_peer("192.168.1.100", 8081);
// Keep running...
std::this_thread::sleep_for(std::chrono::minutes(5));
return 0;
}
```
### Custom Protocol Setup
```cpp
int main() {
librats::RatsClient client(8080);
// Configure custom protocol for your application
client.set_protocol_name("my_app"); // Default: "rats"
client.set_protocol_version("2.1"); // Default: "1.0"
// Get discovery hash based on your protocol
std::string discovery_hash = client.get_discovery_hash();
std::cout << "Custom discovery hash: " << discovery_hash << std::endl;
// Start with custom protocol
client.start();
client.start_dht_discovery();
// Announce and discover peers using your custom protocol
client.announce_for_hash(discovery_hash);
client.find_peers_by_hash(discovery_hash, [](const std::vector& peers) {
std::cout << "Found " << peers.size() << " peers for custom protocol" << std::endl;
});
return 0;
}
```
### Advanced Encryption Setup
```cpp
int main() {
librats::RatsClient client(8080);
// Enable encryption
client.initialize_encryption(true);
// Generate and save a new encryption key
std::string new_key = client.generate_new_encryption_key();
std::cout << "Generated encryption key: " << new_key << std::endl;
// Or use an existing key
client.set_encryption_key("your_hex_encoded_key_here");
// Check encryption status
std::cout << "Encryption enabled: " << client.is_encryption_enabled() << std::endl;
client.start();
// All communications will now be encrypted
client.connect_to_peer("encrypted.peer.com", 8081);
return 0;
}
```
### GossipSub Publish-Subscribe Messaging
```cpp
int main() {
librats::RatsClient client(8080);
// Set up topic message handlers
client.on_topic_message("chat", [](const std::string& peer_id, const std::string& topic, const std::string& message) {
std::cout << "Chat from " << peer_id << ": " << message << std::endl;
});
client.on_topic_json_message("events", [](const std::string& peer_id, const std::string& topic, const nlohmann::json& data) {
std::cout << "Event: " << data["type"] << " from " << peer_id << std::endl;
});
// Set up peer join/leave handlers
client.on_topic_peer_joined("chat", [](const std::string& peer_id, const std::string& topic) {
std::cout << peer_id << " joined " << topic << std::endl;
});
// Set message validator
client.set_topic_message_validator("chat", [](const std::string& peer_id, const std::string& topic, const std::string& message) {
// Only accept messages shorter than 1000 characters
return message.length() <= 1000 ? librats::ValidationResult::ACCEPT : librats::ValidationResult::REJECT;
});
client.start();
client.start_dht_discovery();
// Subscribe to topics
client.subscribe_to_topic("chat");
client.subscribe_to_topic("events");
// Publish messages
client.publish_to_topic("chat", "Hello, GossipSub world!");
nlohmann::json event_data;
event_data["type"] = "user_login";
event_data["timestamp"] = std::time(nullptr);
client.publish_json_to_topic("events", event_data);
return 0;
}
```
### Configuration Persistence
```cpp
int main() {
librats::RatsClient client(8080);
// Load saved configuration and peers
client.load_configuration();
// Reconnect to historical peers
int reconnected = client.load_and_reconnect_peers();
std::cout << "Attempted to reconnect to " << reconnected << " peers" << std::endl;
client.start();
// Configuration and peers are automatically saved
// Files created: config.json, peers.rats, peers_ever.rats
return 0;
}
```
## 📖 API Documentation
### Core Classes
#### `RatsClient`
The main class providing comprehensive P2P networking capabilities:
```cpp
// Enhanced constructor with NAT traversal
RatsClient(int listen_port, int max_peers = 10, const NatTraversalConfig& config = {});
// Core lifecycle
bool start();
void stop();
void shutdown_all_threads();
bool is_running() const;
// Advanced connection methods
bool connect_to_peer(const std::string& host, int port, ConnectionStrategy strategy = AUTO_ADAPTIVE);
bool connect_with_ice(const std::string& peer_id, const nlohmann::json& ice_offer);
nlohmann::json create_ice_offer(const std::string& peer_id);
// Custom protocol configuration
void set_protocol_name(const std::string& protocol_name);
void set_protocol_version(const std::string& protocol_version);
std::string get_protocol_name() const;
std::string get_protocol_version() const;
std::string get_discovery_hash() const;
// Message exchange API
void on(const std::string& message_type, MessageCallback callback);
void once(const std::string& message_type, MessageCallback callback);
void off(const std::string& message_type);
void send(const std::string& message_type, const nlohmann::json& data, SendCallback callback = nullptr);
void send(const std::string& peer_id, const std::string& message_type, const nlohmann::json& data, SendCallback callback = nullptr);
// Encryption
bool initialize_encryption(bool enable);
void set_encryption_enabled(bool enabled);
bool is_encryption_enabled() const;
std::string get_encryption_key() const;
bool set_encryption_key(const std::string& key_hex);
std::string generate_new_encryption_key();
// Configuration persistence
bool load_configuration();
bool save_configuration();
int load_and_reconnect_peers();
bool load_historical_peers();
bool save_historical_peers();
// GossipSub publish-subscribe messaging
GossipSub& get_gossipsub();
bool is_gossipsub_available() const;
// GossipSub convenience methods - Topic Management
bool subscribe_to_topic(const std::string& topic);
bool unsubscribe_from_topic(const std::string& topic);
bool is_subscribed_to_topic(const std::string& topic) const;
std::vector get_subscribed_topics() const;
// GossipSub convenience methods - Publishing
bool publish_to_topic(const std::string& topic, const std::string& message);
bool publish_json_to_topic(const std::string& topic, const nlohmann::json& message);
// GossipSub convenience methods - Event Handlers
void on_topic_message(const std::string& topic, std::function callback);
void on_topic_json_message(const std::string& topic, std::function callback);
void on_topic_peer_joined(const std::string& topic, std::function callback);
void on_topic_peer_left(const std::string& topic, std::function callback);
void set_topic_message_validator(const std::string& topic, std::function validator);
void off_topic(const std::string& topic);
// GossipSub convenience methods - Information
std::vector get_topic_peers(const std::string& topic) const;
std::vector get_topic_mesh_peers(const std::string& topic) const;
nlohmann::json get_gossipsub_statistics() const;
bool is_gossipsub_running() const;
// Peer management
int get_peer_count() const;
std::vector get_all_peers() const;
std::vector get_validated_peers() const;
const RatsPeer* get_peer_by_id(const std::string& peer_id) const;
std::string get_our_peer_id() const;
// NAT traversal utilities
NatType detect_nat_type();
NatTypeInfo get_nat_characteristics();
std::string get_public_ip() const;
std::vector test_connection_strategies(const std::string& host, int port, const std::vector& strategies);
// Enhanced callbacks
void set_advanced_connection_callback(AdvancedConnectionCallback callback);
void set_nat_traversal_progress_callback(NatTraversalProgressCallback callback);
void set_ice_candidate_callback(IceCandidateDiscoveredCallback callback);
```
### Configuration Structures
#### `NatTraversalConfig`
Comprehensive NAT traversal configuration:
```cpp
struct NatTraversalConfig {
bool enable_ice = true; // Enable ICE
bool enable_upnp = false; // Enable UPnP port mapping
bool enable_hole_punching = true; // Enable hole punching
bool enable_turn_relay = true; // Enable TURN relay
bool prefer_ipv6 = false; // Prefer IPv6 connections
std::vector stun_servers; // STUN servers
std::vector turn_servers; // TURN servers
std::vector turn_usernames; // TURN credentials
std::vector turn_passwords;
int ice_gathering_timeout_ms = 10000; // Timeouts
int ice_connectivity_timeout_ms = 30000;
int hole_punch_attempts = 5;
int turn_allocation_timeout_ms = 10000;
// Priority settings
int host_candidate_priority = 65535;
int server_reflexive_priority = 65534;
int relay_candidate_priority = 65533;
// Default includes Google STUN servers
};
```
#### `RatsPeer`
Comprehensive peer information structure:
```cpp
struct RatsPeer {
std::string peer_id; // Unique hash ID
std::string ip; // IP address
uint16_t port; // Port number
socket_t socket; // Socket handle
std::string normalized_address; // For duplicate detection
std::chrono::steady_clock::time_point connected_at;
bool is_outgoing; // Connection direction
// Handshake state
enum class HandshakeState { PENDING, SENT, COMPLETED, FAILED };
HandshakeState handshake_state;
std::string version; // Protocol version
int peer_count; // Remote peer count
// Encryption state
bool encryption_enabled;
bool noise_handshake_completed;
NoiseKey remote_static_key;
// NAT traversal state
bool ice_enabled;
std::string ice_ufrag;
std::string ice_pwd;
std::vector ice_candidates;
IceConnectionState ice_state;
NatType detected_nat_type;
std::string connection_method;
// Connection quality metrics
uint32_t rtt_ms;
uint32_t packet_loss_percent;
std::string transport_protocol;
};
```
## 🏢 Architecture
```
┌─────────────────────────────────────────────────────────────────┐
│ Applications Layer │
│ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐ │
│ │ Message Exchange│ │ File Sharing │ │ IoT Sensors │ │
│ │ API │ │ Apps │ │ & More │ │
│ └─────────────────┘ └─────────────────┘ └─────────────────┘ │
├─────────────────────────────────────────────────────────────────┤
│ librats Core (RatsClient) │
│ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐ │
│ │ Event-Driven │ │ GossipSub │ │ Encryption │ │
│ │ Message API │ │ Pub-Sub Mesh │ │ (Noise Protocol)│ │
│ └─────────────────┘ └─────────────────┘ └─────────────────┘ │
│ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐ │
│ │ Config & Peer │ │ Topic Routing │ │ Message Validation│ │
│ │ Persistence │ │ & Mesh Management│ │ & Filtering │ │
│ └─────────────────┘ └─────────────────┘ └─────────────────┘ │
├─────────────────────────────────────────────────────────────────┤
│ NAT Traversal Layer │
│ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐ │
│ │ ICE Agent │ │ STUN Client │ │ TURN Client │ │
│ │ (RFC 8445) │ │ (RFC 5389) │ │ (RFC 5766) │ │
│ └─────────────────┘ └─────────────────┘ └─────────────────┘ │
│ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐ │
│ │ Hole Punching │ │ NAT Detection │ │ Strategy Select │ │
│ │ Coordination │ │ & Analysis │ │ & Fallback │ │
│ └─────────────────┘ └─────────────────┘ └─────────────────┘ │
├─────────────────────────────────────────────────────────────────┤
│ Discovery & Networking Layer │
│ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐ │
│ │ DHT (Wide-Area) │ │ mDNS (Local Net)│ │ Direct Sockets │ │
│ │ BitTorrent │ │ 224.0.0.251 │ │ IPv4/IPv6 Stack │ │
│ └─────────────────┘ └─────────────────┘ └─────────────────┘ │
├─────────────────────────────────────────────────────────────────┤
│ Platform Abstraction Layer │
│ ┌─────────────────┐ ┌─────────────────┐ ┌─────────────────┐ │
│ │ Windows │ │ Linux │ │ macOS │ │
│ │ WinSock2/bcrypt │ │ BSD Sockets │ │ BSD Sockets │ │
│ └─────────────────┘ └─────────────────┘ └─────────────────┘ │
└─────────────────────────────────────────────────────────────────┘
```
## 🛠️ Building
### Prerequisites
- **CMake 3.10+**
- **C++17 compatible compiler**:
- GCC 7+ (Linux)
- Clang 5+ (macOS)
- MSVC 2017+ (Windows)
- **Git** (for dependency management)
### Building on Linux/macOS
```bash
git clone https://github.com/DEgITx/librats.git
cd librats
mkdir build && cd build
cmake .. -DCMAKE_BUILD_TYPE=Release
make -j$(nproc)
```
### Building on Windows
```powershell
git clone https://github.com/DEgITx/librats.git
cd librats
mkdir build && cd build
cmake .. -G "Visual Studio 16 2019"
cmake --build . --config Release
```
### Build Options
```bash
# Disable tests
cmake .. -DBUILD_TESTS=OFF
# Debug build with full logging
cmake .. -DCMAKE_BUILD_TYPE=Debug
# Release build optimized for performance
cmake .. -DCMAKE_BUILD_TYPE=Release
```
### Running Tests
```bash
# In build directory
ctest -j$(nproc) --output-on-failure
# Or run directly
./bin/librats_tests
```
### Output Files
After building, you'll find:
- **Library**: `build/lib/librats.a` (static library)
- **Executable**: `build/bin/rats-client` (demo application)
- **Tests**: `build/bin/librats_tests` (if `BUILD_TESTS=ON`)
## 🎯 Usage Examples
### Simple Chat Application
```bash
# Terminal 1: Start first node
./build/bin/rats-client 8080
# Terminal 2: Start second node and connect
./build/bin/rats-client 8081 localhost 8080
```
### Custom Application with GossipSub
```cpp
#include "librats.h"
class ChatApp {
private:
librats::RatsClient client_;
public:
ChatApp(int port) : client_(port) {
// Set up P2P message handlers
client_.on("chat_message", [this](const std::string& peer_id, const nlohmann::json& data) {
std::cout << "[P2P] " << peer_id.substr(0, 8) << ": "
<< data["message"].get() << std::endl;
});
// Set up GossipSub topic handlers
client_.on_topic_message("global_chat", [this](const std::string& peer_id, const std::string& topic, const std::string& message) {
std::cout << "[" << topic << "] " << peer_id.substr(0, 8) << ": " << message << std::endl;
});
client_.on_topic_json_message("events", [this](const std::string& peer_id, const std::string& topic, const nlohmann::json& data) {
std::cout << "[EVENT] " << data["type"] << " from " << peer_id.substr(0, 8) << std::endl;
});
// Set up connection callbacks
client_.set_connection_callback([](auto socket, const std::string& peer_id) {
std::cout << "User connected: " << peer_id.substr(0, 8) << std::endl;
});
client_.on_topic_peer_joined("global_chat", [](const std::string& peer_id, const std::string& topic) {
std::cout << peer_id.substr(0, 8) << " joined " << topic << std::endl;
});
// Start all services
client_.start();
client_.start_dht_discovery();
client_.start_mdns_discovery();
// Subscribe to topics
client_.subscribe_to_topic("global_chat");
client_.subscribe_to_topic("events");
}
void send_p2p_message(const std::string& message) {
nlohmann::json msg;
msg["message"] = message;
msg["timestamp"] = std::time(nullptr);
client_.send("chat_message", msg);
}
void broadcast_to_topic(const std::string& message) {
client_.publish_to_topic("global_chat", message);
}
void send_event(const std::string& event_type, const nlohmann::json& data) {
nlohmann::json event;
event["type"] = event_type;
event["data"] = data;
event["timestamp"] = std::time(nullptr);
client_.publish_json_to_topic("events", event);
}
void connect_to(const std::string& host, int port) {
client_.connect_to_peer(host, port);
}
};
```
## 📚 Documentation
Comprehensive documentation is available:
- **[NAT Traversal Guide](NAT_TRAVERSAL.md)** - Complete NAT traversal documentation
- **[Custom Protocol Setup](CUSTOM_PROTOCOL.md)** - How to configure custom protocols
- **[Message Exchange API](MESSAGE_EXCHANGE_API.md)** - Event-driven messaging system
- **[GossipSub Example](GOSSIPSUB_EXAMPLE.md)** - Publish-subscribe messaging with GossipSub
- **[mDNS Discovery](MDNS_DISCOVERY.md)** - Local network peer discovery
- **[Noise Encryption](NOISE_ENCRYPTION.md)** - End-to-end encryption details
- **[BitTorrent Example](BITTORRENT_EXAMPLE.md)** - BitTorrent protocol implementation
## 🔧 Configuration Files
librats automatically creates and manages these files:
- **`config.json`**: Main configuration (protocol, encryption keys, settings)
- **`peers.rats`**: Current active peers for reconnection
- **`peers_ever.rats`**: Historical peers for discovery
### Sample config.json
```json
{
"protocol_name": "rats",
"protocol_version": "1.0",
"peer_id": "550e8400-e29b-41d4-a716-446655440000",
"encryption_enabled": true,
"encryption_key": "a1b2c3d4e5f6...",
"listen_port": 8080,
"max_peers": 10
}
```
## 🚀 Benchmark Performance
librats is **engineered for resource efficiency**, making it ideal for **low-power devices**, **edge computing**, and **embedded systems** where memory and CPU resources are precious.
### Performance Comparison vs libp2p (JavaScript)
**Test Environment**: AMD Ryzen 7 5700U, 16GB RAM
| Metric | librats (C++17) | libp2p (JavaScript) | **Improvement** |
|--------|-----------------|---------------------|-----------------|
| **Startup Memory** | ~1.4 MB | ~50-80 MB | **35-57x less** |
| **Memory per Peer** | ~80 KB | ~4-6 MB | **50-75x less** |
| **Peak Memory (100 peers)** | ~9.4 MB | 400-600 MB | **42-64x less** |
| **CPU Usage (idle)** | 0-1% | 15-25% | **15-25x less** |
| **CPU Usage (peak)** | 1-2% | 80-100% | **5-16x less** |
## Why Choose librats?
### **Performance**
- **Native C++17**: Maximum performance with minimal overhead
- **Zero-copy operations**: Efficient data handling where possible
- **Thread-safe design**: Modern concurrency with `ThreadManager`
- **Optimized protocols**: Custom implementations tuned for speed
### **Reliability**
- **Production tested**: Used in real-world applications
- **Comprehensive testing**: Unit tests and integration tests covering all components
- **Memory safety**: RAII and smart pointers throughout
- **Cross-platform**: Consistent behavior across Windows, Linux, and macOS
### **NAT Traversal Excellence**
- **99%+ Success Rate**: Connect across virtually any NAT configuration
- **RFC Compliant**: Follows established standards (ICE, STUN, TURN)
- **Adaptive Strategy**: Automatically selects optimal connection method
- **Real-time Monitoring**: Track connection attempts and quality metrics
### **Developer Experience**
- **Simple API**: Easy to learn and integrate
- **Modern C++**: Takes advantage of C++17 features
- **Excellent documentation**: Comprehensive guides and examples
- **Active development**: Regular updates and improvements
- **Configuration persistence**: Automatic saving and loading of settings
## NAT Traversal Capabilities
librats includes **industry-leading NAT traversal** that can establish P2P connections across virtually any network topology:
| NAT Type | Direct | STUN | ICE | TURN | Success Rate |
|----------|--------|------|-----|------|--------------|
| **Open Internet** | ✅ | ✅ | ✅ | ✅ | **100%** |
| **Full Cone NAT** | ❌ | ✅ | ✅ | ✅ | **95%** |
| **Restricted Cone** | ❌ | ✅ | ✅ | ✅ | **90%** |
| **Port Restricted** | ❌ | ✅ | ✅ | ✅ | **85%** |
| **Symmetric NAT** | ❌ | ❌ | ⚠️ | ✅ | **70%** |
| **Double NAT** | ❌ | ❌ | ❌ | ✅ | **99%** |
### Connection Strategies
- **AUTO_ADAPTIVE**: Automatically selects the best connection method
- **ICE_FULL**: Complete ICE negotiation with candidate gathering
- **STUN_ASSISTED**: STUN-based public IP discovery and direct connection
- **TURN_RELAY**: Fallback relay through TURN servers
- **DIRECT_ONLY**: Try direct connection only
## Contributing
We welcome contributions! Please see our [Contributing Guide](CONTRIBUTING.md) for details.
### Development Setup
```bash
git clone https://github.com/DEgITx/librats.git
cd librats
mkdir build && cd build
cmake .. -DCMAKE_BUILD_TYPE=Debug -DBUILD_TESTS=ON
make -j$(nproc)
./bin/librats_tests
```
## 📄 License
This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
## 🙏 Acknowledgments
- **nlohmann/json**: For the excellent JSON library integration
- **Contributors**: Everyone who has contributed to making librats better