luckyimnotanigger/tun2proxy
1
0
Fork 0
mirror of https://github.com/tun2proxy/tun2proxy.git synced 2025-04-21 22:39:08 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Virtual DNS: Do not add trailing dot

Browse source
This commit is contained in:
B. Blechschmidt 2024-06-22 16:39:25 +02:00
parent b8c22db037
commit b525d3f99e
1 changed files with 7 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
src/virtual_dns.rs
View file

@ -19,6 +19,7 @@ struct NameCacheEntry {
/// The IP addresses are in the range of private IP addresses.
/// The DNS server is implemented as a LRU cache.
pub struct VirtualDns {
trailing_dot: bool,
lru_cache: LruCache<IpAddr, NameCacheEntry>,
name_to_ip: HashMap<String, IpAddr>,
network_addr: IpAddr,
@ -35,6 +36,7 @@ impl Default for VirtualDns {
let broadcast_addr = calculate_broadcast_addr(start_addr, prefix_len);
Self {
trailing_dot: false,
next_addr: start_addr.into(),
name_to_ip: HashMap::default(),
network_addr: IpAddr::from(network_addr),
@ -54,7 +56,11 @@ impl VirtualDns {
use crate::dns;
let message = dns::parse_data_to_dns_message(data, false)?;
let qname = dns::extract_domain_from_dns_message(&message)?;
let ip = self.allocate_ip(qname.clone())?;
let mut insert_name = qname.clone();
if insert_name.ends_with('.') && !self.trailing_dot {
insert_name = String::from(insert_name.trim_end_matches('.'));
}
let ip = self.allocate_ip(insert_name)?;
let message = dns::build_dns_response(message, &qname, ip, 5)?;
Ok((message.to_vec()?, qname, ip))
}