cc-mdns-reflector

Status

cc-mdns-reflector

This project is used to reflect mdns-packet from one client in one vlan to a configured chromecast in another vlan. The mapping between client and chromecast is doen by MAC address inside a json file.

This program is inspired from https://github.com/Gandem/bonjour-reflector

Installation

On Linux

sudo apt-get update
sudo apt-get install go-dep golang-go libpcap0.8-dev -y

This project depends on libpcap to be able to capture and write packets

Checkout the project in your go src directory

git clone https://github.com/jorisjean/cc-mdns-reflector.git
cd cc-mdns-reflector

dep init
dep ensure
go build
go test

Configuration

There are two input files for this program config.ini which describes the static informations

[mdns-reflector]
chromecast_vlan=10                  # VLAN id of the Chromecasts
client_vlan=20                      # VLAN id of the Clients
mdns_reflector_int=eth0             # Interface to capture packets on
chromecast_spoof_ip=192.168.1.100   # IP address inside the Chromecast VLAN

chromecast_spoof_ip is needed because Chromecasts are only responding to mDNS packets originating from within their own subnet.

states.json which describes the mappings between clients and chromecasts

[
    {
        "client_mac": "11:22:33:44:55:66",
        "cc_mac": "aa:bb:cc:dd:ee:ff",
    },
    {
        "client_mac": "99:88:77:66:55:44",
        "cc_mac": "ff:ee:dd:cc:bb:aa",
    }
]

Usage

Run with: ~/go/src/cc-mdns-reflector/cc-mdns-reflector -config=~/config.ini -states=~/states.json

You can changes the mappings inside the states file and reload the cc-mdns-reflector with a SIGHUP to reload the states file without stoping the program.