feat: README

Readme.md

@@ -0,0 +1,26 @@
+# MDNS Relay
+
+You ever wanted to split your network into multiple indepented ones, while still being able to find
+your printer or join a spotify session in another network? Then this project is for you.
+
+The purpose of this program is to relay multicast DNS (mDNS) packets between multiple private networks.
+Existing solution, such a avahi allow you to do this as well but only unconditionally, relaying all questions
+and answers, with this you can decide what queries get relayed and which get blocked.
+
+## Usage
+`mdns-relay -c <config>` where config is a json file containing these options: 
+```json
+{
+    "interfaces: "A regex used to filter interfaces on which to listen, to exclude for example the public net or VPNs completely",
+    // A list of rules to be applied to incoming packages"
+    "rules" : [
+        {
+            "from": "A regex to match the incoming interface",
+            "to": "The exact name of the interface to which matching packets will be relayed",
+            "allow_questions": "Regex matching any questions",
+            "allow_answers": "Regex matching any answers",
+        }
+    ]
+}
+```
+To apply a rule has to either have a single matching question or answer.

src/main.rs

@@ -4,11 +4,10 @@ use color_eyre::{eyre::bail, Result};
 use pnet::datalink::{interfaces, NetworkInterface};
 use pnet::ipnetwork::IpNetwork::{V4, V6};
 use regex::Regex;
-use serde::{Deserialize, Deserializer};
+use serde::Deserialize;
 use serde_json::from_reader;
 use simple_dns::Packet;
 use socket2::{Domain, Protocol, Socket, Type};
-use std::borrow::Cow;
 use std::fs::File;
 use std::io::BufReader;
 use std::{