1 files changed, 74 insertions, 0 deletions
diff --git a/third_party/rust/dns-parser/src/rdata/ptr.rs b/third_party/rust/dns-parser/src/rdata/ptr.rs
new file mode 100644
index 0000000000..315c3795a8
--- /dev/null
+++ b/third_party/rust/dns-parser/src/rdata/ptr.rs
@@ -0,0 +1,74 @@
+use Name;
+
+#[derive(Debug, Clone, Copy)]
+pub struct Record<'a>(pub Name<'a>);
+
+impl<'a> ToString for Record<'a> {
+    #[inline]
+    fn to_string(&self) -> String {
+        self.0.to_string()
+    }
+}
+
+impl<'a> super::Record<'a> for Record<'a> {
+
+    const TYPE: isize = 12;
+
+    fn parse(rdata: &'a [u8], original: &'a [u8]) -> super::RDataResult<'a> {
+        let name = Name::scan(rdata, original)?;
+        let record = Record(name);
+        Ok(super::RData::PTR(record))
+    }
+}
+
+#[cfg(test)]
+mod test {
+
+    use {Packet, Header};
+    use Opcode::*;
+    use ResponseCode::NoError;
+    use QueryType as QT;
+    use QueryClass as QC;
+    use Class as C;
+    use RData;
+
+    #[test]
+    fn parse_response() {
+        let response = b"\x53\xd6\x81\x80\x00\x01\x00\x01\x00\x00\x00\x00\
+                           \x0269\x0293\x0275\x0272\x07in-addr\x04arpa\x00\
+                           \x00\x0c\x00\x01\
+                           \xc0\x0c\x00\x0c\x00\x01\x00\x01\x51\x80\x00\x1e\
+                           \x10pool-72-75-93-69\x07verizon\x03net\x00";
+        let packet = Packet::parse(response).unwrap();
+        assert_eq!(packet.header, Header {
+            id: 21462,
+            query: false,
+            opcode: StandardQuery,
+            authoritative: false,
+            truncated: false,
+            recursion_desired: true,
+            recursion_available: true,
+            authenticated_data: false,
+            checking_disabled: false,
+            response_code: NoError,
+            questions: 1,
+            answers: 1,
+            nameservers: 0,
+            additional: 0,
+        });
+        assert_eq!(packet.questions.len(), 1);
+        assert_eq!(packet.questions[0].qtype, QT::PTR);
+        assert_eq!(packet.questions[0].qclass, QC::IN);
+        assert_eq!(&packet.questions[0].qname.to_string()[..], "69.93.75.72.in-addr.arpa");
+        assert_eq!(packet.answers.len(), 1);
+        assert_eq!(&packet.answers[0].name.to_string()[..], "69.93.75.72.in-addr.arpa");
+        assert_eq!(packet.answers[0].cls, C::IN);
+        assert_eq!(packet.answers[0].ttl, 86400);
+        match packet.answers[0].data {
+            RData::PTR(name) => {
+                assert_eq!(&name.0.to_string()[..], "pool-72-75-93-69.verizon.net");
+            }
+            ref x => panic!("Wrong rdata {:?}", x),
+        }
+    }
+}