Module dns 

VCL DNS Leak Protection

Prevents DNS queries from leaking outside the VCL tunnel.

The problem

Without DNS protection:
  App → DNS query → OS resolver → ISP DNS → LEAK!
  App → data → VCL tunnel → OK

With DNS protection:
  App → DNS query → VCLDnsFilter → VCL tunnel → private DNS → OK
  App → data → VCL tunnel → OK

Example

use vcl_protocol::dns::{DnsConfig, DnsFilter, DnsPacket};

let config = DnsConfig::default();
let mut filter = DnsFilter::new(config);

// Check if a UDP packet is a DNS query that should be intercepted
let raw = vec![0u8; 12]; // minimal DNS header
if DnsFilter::is_dns_packet(&raw) {
    // route through tunnel instead of OS resolver
}

println!("Upstream DNS: {:?}", filter.config().upstream_servers);

Structs

DnsConfig

Configuration for DNS leak protection.

DnsFilter

DNS leak protection filter.

DnsPacket

A parsed DNS packet (header + first question only).

Enums

DnsAction

Action to take for a DNS query.

DnsQueryType

DNS query type.

Constants

CLOUDFLARE_DNS

Well-known privacy-respecting DNS servers.

CLOUDFLARE_DNS2

GOOGLE_DNS

GOOGLE_DNS2

QUAD9_DNS