From: Matt Corallo <git@bluematt.me>
Date: Thu, 8 Feb 2024 05:47:15 +0000 (+0000)
Subject: Return early if we get a response with no answers
X-Git-Tag: v0.5.4~84
X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=commitdiff_plain;h=20e2430f270f0a719600a205feff4896ca26212f;p=dnssec-prover

Return early if we get a response with no answers
---

diff --git a/src/query.rs b/src/query.rs
index d81e58a..6f68e09 100644
--- a/src/query.rs
+++ b/src/query.rs
@@ -69,6 +69,7 @@ fn handle_response(resp: &[u8], proof: &mut Vec<u8>) -> Result<Option<RRSig>, Er
 	let questions = emap(read_u16(&mut read))?;
 	if questions != 1 { return Err(Error::new(ErrorKind::Other, "server responded to multiple Qs")); }
 	let answers = emap(read_u16(&mut read))?;
+	if answers == 0 { return Err(Error::new(ErrorKind::Other, "No answers")); }
 	let _authorities = emap(read_u16(&mut read))?;
 	let _additional = emap(read_u16(&mut read))?;