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Fixed DNS answers for provided zones.

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This commit is contained in:
Revertron 2021-03-30 19:10:26 +02:00
parent bbcfa102b1
commit 7e742c1553
1 changed files with 28 additions and 4 deletions
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32
src/blockchain/filter.rs
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@ -1,10 +1,11 @@
use crate::Context;
use std::sync::{Mutex, Arc};
use crate::dns::filter::DnsFilter;
use crate::dns::protocol::{DnsPacket, QueryType, DnsRecord, DnsQuestion, ResultCode};
use crate::dns::protocol::{DnsPacket, QueryType, DnsRecord, DnsQuestion, ResultCode, TransientTtl};
#[allow(unused_imports)]
use log::{trace, debug, info, warn, error};
use crate::blockchain::transaction::DomainData;
use chrono::Utc;
pub struct BlockchainFilter {
context: Arc<Mutex<Context>>
@ -16,6 +17,9 @@ impl BlockchainFilter {
}
}
const NAME_SERVER: & str = "ns.alfis.name";
const SERVER_ADMIN: & str = "admin.alfis.name";
impl DnsFilter for BlockchainFilter {
fn lookup(&self, qname: &str, qtype: QueryType) -> Option<DnsPacket> {
let search;
@ -35,14 +39,16 @@ impl DnsFilter for BlockchainFilter {
debug!("Searching record type '{:?}', name '{}' for domain '{}'", &qtype, &subdomain, &search);
let data = self.context.lock().unwrap().chain.get_domain_info(&search);
let zone = parts[0].to_owned();
match data {
None => {
debug!("Not found data for domain {}", &search);
if self.context.lock().unwrap().chain.is_zone_in_blockchain(parts[0]) {
if self.context.lock().unwrap().chain.is_zone_in_blockchain(&zone) {
// Create DnsPacket
let mut packet = DnsPacket::new();
packet.questions.push(DnsQuestion::new(String::from(qname), qtype));
packet.header.rescode = ResultCode::SERVFAIL;
packet.header.rescode = ResultCode::NXDOMAIN;
packet.header.authoritative_answer = true;
//trace!("Returning packet: {:?}", &packet);
return Some(packet);
}
@ -133,17 +139,35 @@ impl DnsFilter for BlockchainFilter {
return if !answers.is_empty() {
// Create DnsPacket
let mut packet = DnsPacket::new();
packet.header.authoritative_answer = true;
packet.questions.push(DnsQuestion::new(String::from(qname), qtype));
for answer in answers {
packet.answers.push(answer);
}
packet.authorities.push( DnsRecord::NS {
domain: zone,
host: String::from(NAME_SERVER),
ttl: TransientTtl(600)
});
//trace!("Returning packet: {:?}", &packet);
Some(packet)
} else {
// Create DnsPacket
let mut packet = DnsPacket::new();
packet.header.authoritative_answer = true;
packet.header.rescode = ResultCode::NXDOMAIN;
packet.questions.push(DnsQuestion::new(String::from(qname), qtype));
packet.header.rescode = ResultCode::SERVFAIL;
packet.authorities.push(DnsRecord::SOA {
domain: zone,
m_name: String::from(NAME_SERVER),
r_name: String::from(SERVER_ADMIN),
serial: Utc::now().timestamp() as u32,
refresh: 3600,
retry: 300,
expire: 604800,
minimum: 60,
ttl: TransientTtl(600),
});
//trace!("Returning packet: {:?}", &packet);
Some(packet)
}