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#![warn(rust_2018_idioms, missing_debug_implementations)]
use dominion::{DnsPacket, Name, QType, ServerService};
use serde::Deserialize;
use std::{collections::BTreeMap, net::SocketAddr};
mod a;
mod txt;
#[derive(Debug)]
pub struct Chat<'a> {
domain: Name<'a>,
xor: Option<Xor>,
files: Option<txt::TxtHandler>,
}
impl<'a> Chat<'a> {
pub fn new(name: Name<'a>, xor: Option<Xor>, files: Option<BTreeMap<String, String>>) -> Self {
let files = files.map(|f| txt::TxtHandler::new(f.into_iter()));
Chat {
domain: name,
files,
xor,
}
}
}
impl ServerService for Chat<'_> {
fn run<'a>(&self, client: SocketAddr, question: &'a DnsPacket<'a>) -> Option<DnsPacket<'a>> {
if question.header.questions > 0 {
match question.questions[0].qtype {
QType::A => Some(a::response(client, question, &self.domain, &self.xor)),
QType::Txt => {
self.files.as_ref().map(|files| files.response(question, &self.domain, &self.xor))
}
_ => Some(refused(question.header.id)),
}
} else {
Some(refused(question.header.id))
}
}
}
#[derive(Debug, Deserialize)]
pub struct Xor {
key: u8,
signal: String,
}
fn refused(id: u16) -> DnsPacket<'static> {
use dominion::*;
let flags = Flags {
qr: QueryResponse::Response,
opcode: OpCode::Query,
aa: AuthoritativeAnswer::Authoritative,
tc: TrunCation::NotTruncated,
rd: RecursionDesired::NotDesired,
ra: RecursionAvailable::NotAvailable,
z: Zero::Zero,
ad: AuthenticData::NotAuthentic,
cd: CheckingDisabled::Disabled,
rcode: ResponseCode::Refused,
};
let header = DnsHeader {
id,
flags,
questions: 0,
answers: 0,
authority: 0,
additional: 0,
};
DnsPacket {
header,
questions: vec![],
answers: vec![],
authority: vec![],
additional: vec![],
}
}