feat(rustdns-client): add Rust DNS client binary and TypeScript IPC bridge to enable UDP and DoH resolution, RDATA decoding, and DNSSEC AD/rcode support

2026-02-11 13:02:37 +00:00
parent 9d4db39741
commit 368430d199
24 changed files with 2805 additions and 863 deletions
@@ -0,0 +1,75 @@
+use crate::ipc_types::{ResolveParams, ResolveResult};
+use crate::resolver_udp::decode_answers;
+use rustdns_protocol::packet::{DnsPacket, DnsQuestion};
+use rustdns_protocol::types::{QClass, QType, EDNS_DO_BIT, FLAG_RD};
+use std::time::Duration;
+use tracing::debug;
+
+/// Resolve a DNS query via DNS-over-HTTPS (RFC 8484 wire format).
+pub async fn resolve_doh(
+    params: &ResolveParams,
+    http_client: &reqwest::Client,
+) -> Result<ResolveResult, String> {
+    let qtype = QType::from_str(&params.record_type);
+    let id: u16 = rand::random();
+
+    // Build query packet (same as UDP)
+    let mut query = DnsPacket::new_query(id);
+    query.flags = FLAG_RD;
+    query.questions.push(DnsQuestion {
+        name: params.name.clone(),
+        qtype,
+        qclass: QClass::IN,
+    });
+
+    // Add OPT record with DO bit for DNSSEC
+    query.additionals.push(rustdns_protocol::packet::DnsRecord {
+        name: ".".to_string(),
+        rtype: QType::OPT,
+        rclass: QClass::from_u16(4096),
+        ttl: 0,
+        rdata: vec![],
+        opt_flags: Some(EDNS_DO_BIT),
+    });
+
+    let query_bytes = query.encode();
+    let timeout = Duration::from_millis(params.timeout_ms);
+
+    let response = http_client
+        .post(&params.doh_url)
+        .header("Content-Type", "application/dns-message")
+        .header("Accept", "application/dns-message")
+        .body(query_bytes)
+        .timeout(timeout)
+        .send()
+        .await
+        .map_err(|e| format!("DoH request failed: {}", e))?;
+
+    if !response.status().is_success() {
+        return Err(format!("DoH server returned status {}", response.status()));
+    }
+
+    let response_bytes = response
+        .bytes()
+        .await
+        .map_err(|e| format!("Failed to read DoH response body: {}", e))?;
+
+    let dns_response = DnsPacket::parse(&response_bytes)
+        .map_err(|e| format!("Failed to parse DoH response: {}", e))?;
+
+    debug!(
+        "DoH response: id={}, rcode={}, answers={}, ad={}",
+        dns_response.id,
+        dns_response.rcode(),
+        dns_response.answers.len(),
+        dns_response.has_ad_flag()
+    );
+
+    let answers = decode_answers(&dns_response.answers, &response_bytes);
+
+    Ok(ResolveResult {
+        answers,
+        ad_flag: dns_response.has_ad_flag(),
+        rcode: dns_response.rcode(),
+    })
+}