# Yanic
```
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 \ V / _` | '_ \| |/ __|
  | | (_| | | | | | (__
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Yet another node info collector
```

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`yanic` is a respondd client that fetches, stores and publishes information about a Freifunk network. The goals:
* Generating JSON for [Meshviewer](https://github.com/ffrgb/meshviewer)
* Storing statistics in [InfluxDB](https://influxdata.com/) or [Graphite](https://graphiteapp.org/) to be analyzed by [Grafana](http://grafana.org/)
* Provide a little webserver for a standalone installation with a meshviewer

## How it works

In the first step Yanic sends a multicast message to the group `ff02:0:0:0:0:0:2:1001` and port `1001`.
Recently seen nodes that does not reply are requested via a unicast message.

## Documentation
Take a look at the [git](https://github.com/FreifunkBremen/yanic/blob/master/SUMMARY.md) or [Gitbook](https://freifunkbremen.gitbooks.io/yanic/content/)


## Configuration
Read comments in [config_example.toml](config_example.toml) for more information.

## Running

Yanic provides several commands:

### Usage

Run Yanic without any arguments to get the usage information:

```
Usage:
  yanic [command]

Available Commands:
  help        Help about any command
  import      Imports global statistics from the given RRD files, requires InfluxDB
  query       Sends a query on the interface to the destination and waits for a response
  serve       Runs the yanic server

Flags:
  -h, --help         help for yanic
      --timestamps   Enables timestamps for log output

Use "yanic [command] --help" for more information about a command.
```

#### Serve

```
Usage:
  yanic serve [flags]

Examples:
  yanic serve --config /etc/yanic.toml

Flags:
  -c, --config string   Path to configuration file (default "config.toml")
  -h, --help            help for serve
```

#### Import

```
Usage:
  yanic import <file.rrd> [flags]

Examples:
  yanic import --config /etc/yanic.toml olddata.rrd

Flags:
  -c, --config string   Path to configuration file (default "config.toml")
  -h, --help            help for import
```


#### Query

```
Usage:
  yanic query <interface> <destination> [flags]

Examples:
  yanic query wlan0 "fe80::eade:27ff:dead:beef"

Flags:
  -h, --help       help for query
      --wait int   Seconds to wait for a response (default 1)
```


## Communities using Yanic

* **Freifunk Bremen** uses InfluxDB, [Grafana](https://grafana.bremen.freifunk.net), and [Meshviewer](https://map.bremen.freifunk.net) with a patch to show state-version of `nodes.json`. 
* **Freifunk Nord** uses [hopglass](https://github.com/hopglass/hopglass) (commit 587740a) as frontend:  https://mesh.freifunknord.de/
* **Freifunk Kiel** uses [Meshviewer](https://github.com/ffrgb/meshviewer/) as frontend: https://map.freifunk.in-kiel.de/

Do you know someone else using Yanic? Create a [pull request](https://github.com/FreifunkBremen/yanic/issues/new?template=community.md&title=Mention+community+$name)!

## Related projects

Collecting data from respondd:
* [HopGlass Server](https://github.com/plumpudding/hopglass-server) written in Node.js

Respondd for servers:
* [ffnord-alfred-announce](https://github.com/ffnord/ffnord-alfred-announce) from FreiFunkNord
* [respondd](https://github.com/Sunz3r/ext-respondd) from Sunz3r


## License

This software is licensed under the terms of the [AGPL v3 License](LICENSE).