Added connect-ip (RFC9484) as a known HTTP/3 CONNECT protocol (#273)

Co-authored-by: Ruben2424 <[email protected]>

Author: yaroslavros

h3/src/ext.rs

@@ -13,13 +13,16 @@ impl Protocol {
     pub const WEB_TRANSPORT: Protocol = Protocol(ProtocolInner::WebTransport);
     /// RFC 9298 protocol
     pub const CONNECT_UDP: Protocol = Protocol(ProtocolInner::ConnectUdp);
+    /// RFC 9484 protocol
+    pub const CONNECT_IP: Protocol = Protocol(ProtocolInner::ConnectIp);
 
     /// Return a &str representation of the `:protocol` pseudo-header value
     #[inline]
     pub fn as_str(&self) -> &str {
         match self.0 {
             ProtocolInner::WebTransport => "webtransport",
             ProtocolInner::ConnectUdp => "connect-udp",
+            ProtocolInner::ConnectIp => "connect-ip",
         }
     }
 }
@@ -28,6 +31,7 @@ impl Protocol {
 enum ProtocolInner {
     WebTransport,
     ConnectUdp,
+    ConnectIp,
 }
 
 /// Error when parsing the protocol
@@ -40,6 +44,7 @@ impl FromStr for Protocol {
         match s {
             "webtransport" => Ok(Self(ProtocolInner::WebTransport)),
             "connect-udp" => Ok(Self(ProtocolInner::ConnectUdp)),
+            "connect-ip" => Ok(Self(ProtocolInner::ConnectIp)),
             _ => Err(InvalidProtocol),
         }
     }