2016-02-17 10:31:41 -08:00
|
|
|
# adsbus
|
|
|
|
|
|
|
|
|
|
adsbus is a hub and protocol translator for [ADS-B](https://en.wikipedia.org/wiki/Automatic_dependent_surveillance_%E2%80%93_broadcast) messages.
|
|
|
|
|
|
2016-02-28 21:41:35 -08:00
|
|
|
It is conceptually similar to `dump1090 --net-only`, but supports more protocols and configurations. It doesn't talk to your radio itself; it
|
|
|
|
|
hooks programs that do, then handles the network distribution and format translation. It doesn't output to a web interface or send data to
|
|
|
|
|
services like FlightAware; it provides hooks for programs that do.
|
|
|
|
|
|
2016-02-17 10:31:41 -08:00
|
|
|
|
|
|
|
|
## Building
|
|
|
|
|
|
2016-02-17 10:34:00 -08:00
|
|
|
```bash
|
2016-02-28 19:49:06 -08:00
|
|
|
sudo apt-get -y install build-essential git clang libjansson-dev libprotobuf-c-dev protobuf-c-compiler
|
2016-02-17 10:34:47 -08:00
|
|
|
git clone https://github.com/flamingcowtv/adsb-tools.git
|
2016-02-28 19:49:06 -08:00
|
|
|
cd adsb-tools/adsbus
|
2016-02-17 10:31:41 -08:00
|
|
|
make
|
2016-02-17 10:32:34 -08:00
|
|
|
```
|
2016-02-28 21:41:35 -08:00
|
|
|
|
|
|
|
|
|
|
|
|
|
## Features
|
|
|
|
|
|
|
|
|
|
* Separates the concepts of transport, data direction, and format
|
|
|
|
|
* Transports:
|
|
|
|
|
* Outgoing TCP connection
|
|
|
|
|
* Incoming TCP connection
|
|
|
|
|
* Local files or [named pipes](https://en.wikipedia.org/wiki/Named_pipe)
|
|
|
|
|
* [stdin/stdout](https://en.wikipedia.org/wiki/Standard_streams)
|
|
|
|
|
* Execute a command and use its stdin/stdout
|
|
|
|
|
* Data directions:
|
|
|
|
|
* Send (data flows out of adsbus)
|
|
|
|
|
* Receive (data flows in to adsbus)
|
|
|
|
|
* Formats:
|
|
|
|
|
* [airspy_adsb](../airspy_adsb.md) (a.k.a. ASAVR)
|
|
|
|
|
* [beast](../beast.md)
|
|
|
|
|
* [json](../json.md)
|
|
|
|
|
* [proto](../proto.md) (a.k.a. ProtoBuf, Protocol Buffers)
|
|
|
|
|
* [raw](../raw.md) (a.k.a. AVR)
|
|
|
|
|
* stats (outgoing only, summary aggregated data)
|
|
|
|
|
* Transport features:
|
|
|
|
|
* [IPv4](https://en.wikipedia.org/wiki/IPv4) and [IPv6](https://en.wikipedia.org/wiki/IPv6) support
|
|
|
|
|
* Reresolution/reconnection on disconnect, with backoff and jitter
|
|
|
|
|
* [TCP keepalives](https://en.wikipedia.org/wiki/Keepalive#TCP_keepalive) for dead connection detection
|
|
|
|
|
* [TCP fast open](https://en.wikipedia.org/wiki/TCP_Fast_Open) for faster startup on high-latency connections
|
|
|
|
|
* [SO_REUSEPORT](https://lwn.net/Articles/542629/) for zero-downtime updates
|
|
|
|
|
* Format features:
|
|
|
|
|
* Autodetection of received data format
|
|
|
|
|
* [MLAT](https://en.wikipedia.org/wiki/Multilateration) scaling for different clock rates and counter bit widths
|
|
|
|
|
* [RSSI](https://en.wikipedia.org/wiki/Received_signal_strength_indication) scaling for different bit widths
|
|
|
|
|
* Introduces json format for balanced human and machine readability with forward compatibility
|
|
|
|
|
* Introduces proto format for fast serialization and deserialization with forward compatibility
|
|
|
|
|
* Federation:
|
|
|
|
|
* Federation allows linking multiple instances of adsbus for:
|
|
|
|
|
* Scalability (cores, number of input or output clients, etc.)
|
|
|
|
|
* Efficient long-haul links (hub and spoke models on both ends)
|
|
|
|
|
* json and proto formats carry information about original source across multiple hops
|
|
|
|
|
* SO_REUSEPORT allows multiple adsbus instances to accept connections on the same IP and port without a load balancer
|
