Add comments and LICENSE

src/extensions/extension_data/alpn.rs

@@ -4,16 +4,6 @@ use crate::{
     parse_buffer::{ParseBuffer, ParseError},
 };
 
-/// ALPN protocol name list per RFC 7301, Section 3.1.
-///
-/// Wire format:
-/// ```text
-/// opaque ProtocolName<1..2^8-1>;
-///
-/// struct {
-///     ProtocolName protocol_name_list<2..2^16-1>
-/// } ProtocolNameList;
-/// ```
 #[derive(Debug, Clone)]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct AlpnProtocolNameList<'a> {
@@ -22,12 +12,6 @@ pub struct AlpnProtocolNameList<'a> {
 
 impl<'a> AlpnProtocolNameList<'a> {
     pub fn parse(buf: &mut ParseBuffer<'a>) -> Result<Self, ParseError> {
-        // We parse but don't store the individual protocol names in a heapless
-        // container — just validate the wire format. The slice reference is kept
-        // for the lifetime of the parse buffer, but since we can't reconstruct
-        // `&[&[u8]]` from a flat buffer without allocation, we store an empty
-        // slice. Callers that need the parsed protocols (server-side) would need
-        // a different approach; for our client-side use we only need encode().
         let list_len = buf.read_u16()? as usize;
         let mut list_buf = buf.slice(list_len)?;
 
@@ -43,7 +27,6 @@ impl<'a> AlpnProtocolNameList<'a> {
     }
 
     pub fn encode(&self, buf: &mut CryptoBuffer) -> Result<(), ProtocolError> {
-        // Outer u16 length prefix for the ProtocolNameList
         buf.with_u16_length(|buf| {
             for protocol in self.protocols {
                 buf.push(protocol.len() as u8)