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Updated to support DNS over TLS

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Discsearcher
2026-08-12 10:28:03 -04:00
parent c65f574c1d
commit 08e97a046d
1 changed files with 27 additions and 9 deletions
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dns_compare.py
+27 -9
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@@ -102,24 +102,42 @@ def perform_query(full_domain, ns, record_type, timeout):
# Add EDNS0 extension for better compatibility (like dig does)
q.use_edns(edns=0, ednsflags=0, payload=4096)
# Try TCP first for better compatibility with some servers
# Try UDP first
try:
r = query.tcp(q, ns, timeout=timeout)
if args.verbose:
print(f"[DEBUG] TCP Response: Answer={len(r.answer)} RRsets, TC flag: {bool(r.flags & flags.TC)}", file=sys.stderr)
except Exception as e:
# Fall back to UDP if TCP fails
if args.verbose:
print(f"[DEBUG] TCP failed ({e}), trying UDP...", file=sys.stderr)
r = query.udp(q, ns, timeout=timeout)
if args.verbose:
print(f"[DEBUG] UDP Response: Answer={len(r.answer)} RRsets, TC flag: {bool(r.flags & flags.TC)}", file=sys.stderr)
# If UDP returns truncated, retry with TCP
if r.flags & flags.TC:
if args.verbose:
print(f"[DEBUG] UDP Response truncated (TC flag set), retrying with TCP...", file=sys.stderr)
try:
r = query.tcp(q, ns, timeout=timeout)
if args.verbose:
print(f"[DEBUG] TCP Retry Response: Answer={len(r.answer)} RRsets, TC flag: {bool(r.flags & flags.TC)}", file=sys.stderr)
print(f"[DEBUG] TCP Response: Answer={len(r.answer)} RRsets, TC flag: {bool(r.flags & flags.TC)}", file=sys.stderr)
except Exception as tcp_error:
# Fall back to TLS if TCP fails
if args.verbose:
print(f"[DEBUG] TCP failed ({tcp_error}), trying TLS...", file=sys.stderr)
r = query.tls(q, ns, timeout=timeout)
if args.verbose:
print(f"[DEBUG] TLS Response: Answer={len(r.answer)} RRsets, TC flag: {bool(r.flags & flags.TC)}", file=sys.stderr)
except Exception as udp_error:
# Fall back to TCP if UDP fails
if args.verbose:
print(f"[DEBUG] UDP failed ({udp_error}), trying TCP...", file=sys.stderr)
try:
r = query.tcp(q, ns, timeout=timeout)
if args.verbose:
print(f"[DEBUG] TCP Response: Answer={len(r.answer)} RRsets, TC flag: {bool(r.flags & flags.TC)}", file=sys.stderr)
except Exception as tcp_error:
# Fall back to TLS if TCP fails
if args.verbose:
print(f"[DEBUG] TCP failed ({tcp_error}), trying TLS...", file=sys.stderr)
r = query.tls(q, ns, timeout=timeout)
if args.verbose:
print(f"[DEBUG] TLS Response: Answer={len(r.answer)} RRsets, TC flag: {bool(r.flags & flags.TC)}", file=sys.stderr)
# Verbose debugging
if args.verbose: