petnet-feeder-service

Reverse-engineering the PetNet feeders. So far v2 has been properly hacked!

This is an experimental web interface that assumes you have set up your PetNet Feeder V2 already. There is not a way to set up the WiFi credentials in this repository.

Network setup

To intercept calls without needing to hack an entire network, you will need to add a PiHole to your network (they're nice to have anyhow). TKTK.

DNS spoofing

You must configure fake DNS addresses for some of the hosts which the PetNet Feeder attempts to connect.

• api.arrowconnect.io
• mqtt-a01.arrowconnect.io

It doesn't matter what address this is pointing to, but I suggest an address on the RFC 1918 scope that is not in your local network such as 172.4.0.1. You'll need to use this later in the firewall setup.

Doing an nslookup on the addresses should yield results like this:

$ nslookup api.arrowconnect.io
Server:         ::1
Address:        ::1#53

Name:   api.arrowconnect.io
Address: 172.4.0.1

$ nslookup mqtt-a01.arrowconnect.io
Server:         ::1
Address:        ::1#53

Name:   mqtt-a01.arrowconnect.io
Address: 172.4.0.1

Firewall setup

For this step you need to set up NAT for the fake address that you used before (e.g., 172.4.0.1). If the source and destination are on the same network, you'll need to make sure it's a hairpin NAT so that the source addresses are translated to something else as well.

IPTables

In this example, I'm assuming you're redirecting to the actual server at address 192.168.1.10 from the fake address:

iptables -t nat -A PREROUTING -i eth0 -p tcp -d 172.4.0.1 --dport 80 -j DNAT --to 192.168.1.10:7112
iptables -t nat -A PREROUTING -i eth0 -p tcp -d 172.4.0.1 --dport 443 -j DNAT --to 192.168.1.10:7112
iptables -t nat -A PREROUTING -i eth0 -p tcp -d 172.4.0.1 --dport 1883 -j DNAT --to 192.168.1.10:1883
iptables -t nat -A PREROUTING -i eth0 -p tcp -d 172.4.0.1 --dport 8883 -j DNAT --to 192.168.1.10:8883

Running the app

docker

docker run -d \
  --name=petnet-feeder-service \
  -p 5000:5000 \
  -p 7112:7112 \
  -p 8883:8883 \
  --restart unless-stopped \
  tedder42/petnet-feeder-service

docker-compose

---
version: "2.1"
services:
  bazarr:
    image: tedder42/petnet-feeder-service
    container_name: petnet-feeder-service
    ports:
      - 5000:5000
      - 7112:7112
      - 8883:8883
    restart: unless-stopped

Parameters

Parameter	Function
-p 5000:5000	The HTTP access port for the webserver.
-p 7112:7112	The HTTPS access port for the webserver.
-p 8883:8883	The MQTT TLS port for the PetNet feeder.

Developing

You need to make sure the Python modules are available.

make init

To run the daemon locally:

cd feeder && ./main.py

How can I help?

If you have tech and coding experience, you can help! Drop me an email, [email protected], introduce yourself, and I'll send you a Slack invite. I'm not looking for people who want to 'hang out', I need people willing to contribute documentation or code. Current needs:

• more comprehensive installation instructions
• run locally and intercept calls
• read the Konexios documentation and figure out what calls we need to make
• add on to the app
• create a straightforward UI