feat: add dingo link

__network/dingo/src/parse.rs

@@ -0,0 +1,32 @@
+use nom::{combinator::map_res, IResult};
+
+/// Matches a sequence of labels, terminated by a zero-length label.
+pub fn parse_labels_then_zero(mut i: &[u8]) -> IResult<&[u8], Vec<String>> {
+    let mut labels = Vec::new();
+    loop {
+        let (new_i, label) = parse_label(i)?;
+        i = new_i;
+        let len = label.len();
+        labels.push(label);
+        if len == 0 {
+            return Ok((i, labels));
+        }
+    }
+}
+
+/// Read one byte as a u8. Then read that many following bytes and output them, as ASCII.
+pub fn parse_label(i: &[u8]) -> IResult<&[u8], String> {
+    let parse_len = map_res(nom::number::complete::be_u8, |num| {
+        if num >= 64 {
+            Err(format!(
+                "DNS name labels must be <=63 bytes but this one is {num}"
+            ))
+        } else {
+            Ok(num)
+        }
+    });
+    let parse_label = nom::multi::length_data(parse_len);
+    map_res(parse_label, |bytes: &[u8]| {
+        String::from_utf8(bytes.to_vec())
+    })(i)
+}