requestd

Building

sudo apt install libzmq3-dev libsqlite3-dev git automake pkg-config libssl-dev libjq-dev libonig-dev libtool cmake
cargo build

Run

generate default config:

request config -d | tee requestd.yml

modify the generated config as you like. Then simply run requestd

requestd

Endpoints

You can configure different endpoints which distribute the respondd responses via different protocols. Currently there are 3 implemented protocols:

http
mqtt
zmq pub/sub

http

To enable the http endpoint add the following to your requestd.yml:

web:
  listen: "[::]:21001"

All node responses will be available at http://localhost:21001/responses

mqtt

To enable the mqtt endpoint add the following to your requestd.yml:

mqtt:
  broker: localhost:1883
  topic: ffhl

Mqtt authentication in currently not supported.

zmq

To enable the zmq endpoint add the following to your requestd.yml:

zmq:
  bind_to: "tcp://*:21002"

You can now SUBscribe to this endpoint with another application. Remember that zmq pub/sub also uses topics. The topic used by requestd is requestd. For each message you need to call zmq_recv() twice. The first call will receive the topic, the second will receive the actual message.

Help!

"is there a route configured?"

Sometimes it is necessary to explicitely set a route for the multicast address. There a two ways to set up a route:

1. use `ip r` for temprary setups

get the source ip address for the interface you want to use (ip a)
add a route for the multicast address: sudo ip route add ff05::2:1001/128 dev <interface> src <source address> table local

2. use systemd-networkd

If your Host use systemd-network for the network configuration you can simply add this to the .network file for the interface connected to the freifunk network:

[Match]
# use your iface name here
Name=ffhl

[Network]
# some network config here
# https://www.freedesktop.org/software/systemd/man/systemd.network.html#%5BNetwork%5D%20Section%20Options

# finally an explicit route entry:
[Route]
Destination=ff05::2:1001/128
Type=multicast
Table=local

"I am behind a freifunk node that has ebtable filters"

https://wiki.luebeck.freifunk.net/docs/infrastruktur/gallifrey-gluon01/

ssh root@node.ffhl
echo "rule 'MULTICAST_OUT -p IPv6 --ip6-protocol udp --ip6-destination-port 1001 --ip6-dst ff02::2:1001 -j RETURN'" > /lib/gluon/ebtables/110-mcast-allow-respondd
echo "rule 'MULTICAST_OUT -p IPv6 --ip6-protocol udp --ip6-destination-port 1001 --ip6-dst ff05::2:1001 -j RETURN'" > /lib/gluon/ebtables/110-mcast-allow-respondd
/etc/init.d/gluon-ebtables restart

cuechan/requestd