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HDDS

High-Performance Data Distribution Service

257ns intra-process | <250μs UDP | 4.48M msg/s | ROS2 drop-in

High-performance Data Distribution Service implementation designed for critical defense systems and real-time autonomous operations.

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0ns

Intra-process

0.0M

Messages/second

Tests passing

Production-Ready Features

Built for demanding real-time systems in defense and aerospace

QoS

QoS Interoperability

DDS-Security support (core complete, SPDP/SEDP integration WIP) and Time-Sensitive Networking (TSN).

→15 automated rule detection
→Real-time policy enforcement
→Zero-copy optimization

ML Anomaly Detection

Advanced machine learning models detect network intrusions and protocol anomalies in real-time.

→ONNX runtime integration
→Trained on DDS protocol traces
→Low-latency ONNX inference

ROS2 Drop-in

5.7x faster than CycloneDDS. 7.5x faster than FastRTPS. Benchmarked with Apex.AI performance_test, Docker, 1 KB messages at 1000 Hz. Same API, zero code change.

→18.4 µs mean latency (vs 104.8 µs CycloneDDS)
→Apex.AI benchmark — Docker, reproducible
→999/999 messages, zero loss

Performance That Matters

Benchmarked against leading DDS implementations on identical hardware

Latency Comparison (intra-process)

HDDS257ns (write)

CycloneDDS~1.2us

FastDDS~2.5us

Measured on Ubuntu 24.04, i9-13900K, 64GB RAM, intra-process 1-byte payload

Throughput

4.48M

messages/second

Delivered end-to-end: ~575k msg/s (1 thread; scales with batching & multi-writer)

CPU Usage

100%

HDDS: 12% vs Others: 75-95%

Memory

512MB

HDDS: 48MB vs Others: 256-512MB

DDS ON ESP32 + HC-12 RADIOS

hdds-micro for IoT & Embedded

Full DDS on ESP32, RP2040, STM32 - with built-in LoRa, BLE and radio transports

From Sensor to Cloud

IOT SENSORS (hdds-micro, no_std)

ESP32

+ HC-12

~3€

RP2040

+ nRF24

~5€

STM32

+ LoRa

~10€

433MHz

1km

2.4GHz

100m

LoRa

10km+

GATEWAY

Radio -> UDP/IP

RTPS

hdds / FastDDS / CycloneDDS

Full DDS stack

Supported Radio Transports

📻

HC-12

~3€

433 MHz ISM band

Range: 1 km

5-15 kbps

📡

LoRa SX1276

~8€

868/915 MHz

Range: 10+ km

0.3-50 kbps + fragmentation

🛜

nRF24L01+

~2€

2.4 GHz

Range: 100 m

2 Mbps

📶

CC1101

~5€

Sub-GHz (315-915 MHz)

Range: 500 m

500 kbps

~70KB

Flash usage

~40KB

RAM usage

no_std

No OS required

Validated Hardware

ESP32-WROOM

Xtensa

WiFi

25/25

ESP32 + HC-12

Xtensa

433MHz

18/18

Pi Zero 2 W

aarch64

WiFi

10/10

Pi Zero v1

armv6

WiFi

10/10

Linux PC

x86_64

UDP

10/10

Windows 10

x86_64

UDP

10/10

RP2040

ARM M0+

nRF24

Tested

OWA5X

aarch64

UDP

396µs

DDS IN THE BROWSER

hdds-ws WebSocket Gateway

Access your DDS network from any web browser. No plugins, no Java, no ActiveX. Just standard WebSocket + JSON.

→Subscribe to DDS topics from JavaScript

→Publish messages from React/Vue/Angular

→Real-time dashboards without polling

→Works behind firewalls (port 443)

// Browser JavaScript

const

ws = new WebSocket('wss://dds.example.com');

// Subscribe to topic

ws.send(JSON.stringify({

"action": "subscribe",

"topic": "sensor/temperature"

}));

// Receive DDS samples

ws.onmessage = (e) => {

const

sample = JSON.parse(e.data);

console.log(sample.temperature);

};

No plugins required - hdds-ws is 100% open source

WIRE-COMPATIBLE WITH 4 MAJOR VENDORS

Proven Interoperability

9 test scenarios passed with FastDDS, RTI Connext (6.x & 7.x), CycloneDDS and OpenDDS — PCAP evidence included

FastDDS

eProsima v3.1.x

HDDS → FastDDS50/50

FastDDS → HDDS50/50

XCDR1 + XCDR2100%

RTI

RTI Connext

v6.1.0 & v7.3.0

RTI 6.1 → HDDS50/50

RTI 7.3 → HDDS49/50

RTPS 2.3 + 2.5100%

CycloneDDS

Eclipse v0.10.x

HDDS → Cyclone50/50

Cyclone → HDDS50/50

Bidirectional100%

OpenDDS

OCI v3.28.x

HDDS → OpenDDS50/50

OpenDDS → HDDS50/50

Bidirectional100%

Interop-tested DDS Implementations

FastDDS0x010f

RTI Connext0x0101

CycloneDDS0x0110

OpenDDS0x0103

100% OPEN SOURCE

Why HDDS?

A complete DDS ecosystem, free and open source

🦀

Pure Rust

Memory safe, no segfaults, safe concurrency by design

🔓

No Vendor Lock-in

Apache 2.0 / MIT dual license, fork freely

🌐

Full Interop

Works with FastDDS, RTI, CycloneDDS, OpenDDS

📦

Batteries Included

Router, Gateway, Security, RPC - all included

HDDS Feature Matrix

✓DDS v1.4 Core

✓RTPS v2.5

✓22 QoS Policies

✓DDS Security v1.1

✓Routing Service

✓REST Gateway

✓WebSocket Gateway

✓DDS-RPC

✓K8s Discovery

✓Cloud Discovery

✓Embedded (no_std)

★Radio Transports

✓TCP+TLS

✓Shared Memory

✓TSN Support

✓Recording Service

✓C FFI (273 functions)

✓Dynamic Types API

✓Content Filtering

★QUIC Transport

★ = Unique to HDDS among open-source DDS implementations

Complete Ecosystem

Everything you need for mission-critical data distribution

HDDS Core

Full DDS v1.4 + RTPS v2.5 in pure Rust. Zero unsafe in serialization and network I/O.

hdds-micro

DDS for ESP32, RP2040, STM32. no_std, 64KB flash, radio transports.

DDS Security

DDS-SEC v1.1: X.509, AES-256-GCM, ECDH P-256. ANSSI-aligned.

QUIC Transport

DDS over QUIC with 0-RTT, multiplexing, and built-in TLS 1.3.

DDS-RPC

Request/Reply pattern over DDS. Service discovery + typed dispatch.

Routing Service

Cross-domain bridging with content filtering and QoS transformation.

Recording Service

Record/replay DDS traffic. MCAP + custom .hddscap format.

TSN Support

Time-Sensitive Networking. IEEE 802.1Qbv + hardware timestamping.

Cloud Discovery

Kubernetes + AWS Cloud Map + Azure discovery. No multicast needed.

C FFI (273 functions)

Complete C API. Python, C++, TypeScript bindings included.

hdds_gen

IDL compiler: 7 targets (Rust/C/C++/Python/TS/C#/Go).

REST Gateway

HTTP/JSON API for DDS. OpenAPI spec auto-generated.

WebSocket Gateway

Browser-to-DDS bridge. Subscribe/publish via JSON over WS.

Dynamic Types

XTypes dynamic type system. Runtime type creation and introspection.

Content Filtering

SQL-like topic filtering. Evaluate at writer or reader side.

Shared Memory

Zero-copy IPC via SHM. Designed for zero-copy integration.

ROS2 Bridge

rmw_hdds: drop-in replacement for ROS2 middleware layer.

HDDS Viewer

AI-powered DDS analyzer with ML anomaly detection.

HDDS WASM

Full DDS SDK in the browser via WebAssembly + native relay.

DDS-XRCE

Ultra-lightweight for constrained MCUs (<20KB RAM). Agent/client protocol.

Schema Registry

Centralized IDL registry. Versioning, validation, automatic distribution.

OpenTelemetry

Native OTLP export. Traces and metrics to Jaeger, Prometheus, Grafana.

InfluxDB Sink

Real-time DDS metrics to InfluxDB for Grafana dashboards.

Developer Tools

Professional CLI tools for debugging, testing, and operating your DDS infrastructure

hdds-admin

Administration and runtime monitoring CLI.

hdds-convert-qos

Multi-vendor QoS XML converter (RTI/FastDDS/Cyclone).

hdds-latency-probe

DDS latency benchmark with ping-pong measurements.

hdds-shm-viewer

Shared memory segment inspector for debugging.

hdds-topic-echo

Real-time DDS topic echo (rostopic echo equivalent).

hdds-stress

DDS stress testing and load generation tool.

hddsctl

HDDS control CLI (start/stop/status).

hdds-discovery-dump

Live dump of network discovery state.

hdds-debugger

Interactive DDS debugger with message breakpoints.

17 DEMO PACKS

See It In Action

Real demos built with HDDS. Each pack runs standalone with a web viewer and simulated or real hardware.

Sentinel C2

Three.js

Tactical C2 with ESP32 + HC-12 433MHz radio

Air Defense Radar

Canvas 2D

Radar sweep, aircraft tracks, SAM engagement

Artillery Fire Control

Canvas 2D

Ballistic FDC, 3 batteries, fire correction

Naval Convoy

Three.js

Ships, submarine, sonar with ocean sim

Convoy Escort

Canvas 2D

Multi-vehicle convoy escort mission

Predictive Maintenance

Canvas 2D

SCADA dashboard with simulated sensors

Smart Factory

Canvas 2D

Production line, 2.5D isometric view

Railway Network

Canvas 2D

Trains, signals, stations management

Robot Swarm

Canvas 2D

12 robots, boids algorithm, formations

LiDAR Mapping

Canvas 2D

SLAM simulation, occupancy grid

Drone Racing

Three.js

3D AI drone racing course

Metal Slug Arena

Canvas 2D

PvP tanks, physics, power-ups

Space Invaders

Canvas 2D

Classic shooter with DDS aliens

Remote Sensor

Hardware

ESP32-CAM + DHT22 via HC-12 433MHz

Sentinel Home

WebSocket

Home automation variant of Sentinel

UDS Fleet Diag

6 topics

UDS/CAN diagnostic fleet bridge

Satellite Ground

Canvas 2D

8 satellites, 3 ground stations, orbital mechanics

17ready to run

7categories

ESP32 + Pihardware ready

All demos are open source with web viewers. Each runs with cargo run + a browser.

See It In Action

Experience the power and simplicity of HDDS through live demonstrations

From Zero to Pub/Sub

# Clone HDDS + code generator

$git clone https://git.hdds.io/hdds/hdds.git

$git clone https://git.hdds.io/hdds/hdds_gen.git

$cd hdds_gen && cargo install --path .

Installed hddsgen

# Generate a project from IDL

$echo 'struct Temperature { @key unsigned long sensor_id; float value; };' > temperature.idl

$hddsgen gen rust temperature.idl --example --out-dir ./my-sensor

Generated src/temperature.rs
Generated src/bin/publisher.rs
Generated src/bin/subscriber.rs
Generated Cargo.toml

# Build & run

$cd my-sensor && cargo run --bin subscriber &

[HDDS] Domain 0 | UDP multicast | Ready

$cargo run --bin publisher

[PUB] Temperature { sensor_id: 42, value: 3.14 }
[SUB] Received: Temperature { sensor_id: 42, value: 3.14 }

Clone, generate from IDL, build and run. Pure Rust, no system dependencies.

What's Next

Upcoming features for HDDS Studio

🤖

HDDS Studio "Jarvis Edition"

“The IDL Editor That Connects to Your Live System”

3/5 milestones complete - 2 remaining

HDDS Studio already has live runtime connection, AI assistant, and performance prediction. Two remaining milestones: Multi-Process Viewer and Timeline Debugger.

🔴

Live Introspection ✓

Runtime connection to DDS system - SHIPPED v1.2

🟣

Performance Predictor ✓

QoS impact analysis - SHIPPED v1.2

🟢

AI Assistant ✓

Local LLM-powered help - SHIPPED v1.0

🔵

Multi-Process Viewer

Network-wide visualization

🟠

Timeline Debugger

.hddscap time-travel debugging

✓Telemetry Protocol v2

✓Local LLM (llama.cpp)

✓< 1% telemetry overhead

📡

Live System Introspection

✓ SHIPPED in v1.2

First IDL editor that shows you what's ACTUALLY happening in your system. Bidirectional Studio - Runtime connection with real-time metrics.

✓Real-time type discovery & metrics

✓Performance heatmap overlay

✓MessagePack over TCP (< 1% overhead)

🔒

DDS Security v1.1

Complete

X.509 authentication, AES-256-GCM encryption, and permissions XML. Designed for ANSSI/DGA certification alignment.

✓X.509 cert auth + CRL revocation

✓AES-256-GCM encryption (ring)

✓ECDH P-256 key exchange

✓Access control + audit logging

✓SPDP/SEDP discovery integration

🎭

Visual Testing Automation

Planned

Automated visual regression testing for HDDS Viewer and Studio with Playwright.

○20 visual tests (10 per product)

○E2E workflow automation

○CI/CD integration (GitHub Actions)

🔄

Multi-Vendor QoS

✓ MVP Complete

High-fidelity QoS conversion between RTI, FastDDS, and Cyclone. Canonical MCQ format with validation and scoring.

✓RTI 6.x XML -> MCQ (high-fidelity)

✓Validation with CRITICAL/MAJOR/MINOR

✓CLI tool with auto-detection

⚡

Smart Router

In Development

Priority-based routing (IntraProc > SHM > RTPS) with intelligent fanout planning. Zero-copy for same-process readers.

●Target: < 10 us for 1000-reader fanout [ROADMAP]

●Automatic location classification

●SHM segment reuse optimization

🎖️

Certification Roadmap

Planned

Architecture designed for certifiability: AES-256-GCM, SHA-384, P-384 cryptography, auditable codebase, full traceability.

○Threat model & supply chain audit

○FIPS 140-3 module validation

○Common Criteria evaluation

First open-source Rust DDS with proven vendor interop + ANSSI-aligned crypto + supply chain transparency

Telemetry Protocol v2 - Local LLM support - < 1% telemetry overhead

Ready for Production?

Open-source DDS middleware built in France for defense and aerospace real-time systems.

Get Started Documentation