fix parse wrong packetInReason code

src/controller.rs

@@ -39,6 +39,7 @@ impl ControllerFrame<Openflow10> for Controller {
      * Start here for handle packetIn message.
      */
     fn packet_in_handler(&mut self, xid: u32, packetin: PacketInEvent, stream: &mut TcpStream) {
+        println!("reason {:?}", packetin.reason);
         let pkt = packetin.ether_parse();
         self.mac_to_port.insert(pkt.mac_src, packetin.in_port);
 
@@ -62,9 +63,11 @@ impl ControllerFrame<Openflow10> for Controller {
             match_fields.mac_dest = Some(mac_dst);
             match_fields.mac_src = Some(mac_src);
             if let Some(buf_id) = packetin.buf_id {
+                println!("found buf id");
                 self.add_flow(xid, 1, match_fields, &actions, Some(buf_id as u32), stream);
                 return;
             } else {
+                println!("not found buf id");
                 self.add_flow(xid, 1, match_fields, &actions, None, stream);
             }
         }

src/openflow/ofp10/events/packet_in.rs

@@ -4,10 +4,23 @@ use super::Payload;
 use byteorder::{BigEndian, ReadBytesExt};
 use std::io::{BufRead, Cursor};
 
+#[derive(Debug)]
 pub enum PacketInReason {
     NoMatch,
     Action,
-    Unknown,
+    InvalidTTL,
+    Unknown(u8),
+}
+
+impl PacketInReason {
+    fn new(code: u8) -> Self {
+        match code {
+            0 => PacketInReason::NoMatch,
+            1 => PacketInReason::Action,
+            2 => PacketInReason::InvalidTTL,
+            t => PacketInReason::Unknown(t),
+        }
+    }
 }
 
 pub struct PacketInEvent {
@@ -33,11 +46,7 @@ impl PacketInEvent {
         };
         let total_len = bytes.read_u16::<BigEndian>().unwrap();
         let in_port = bytes.read_u16::<BigEndian>().unwrap();
-        let reason = match bytes.read_u8().unwrap() {
-            1 => PacketInReason::NoMatch,
-            2 => PacketInReason::Action,
-            _ => PacketInReason::Unknown,
-        };
+        let reason = PacketInReason::new(bytes.read_u8().unwrap());
         let table_id = bytes.read_u8().unwrap();
         let packet = bytes.fill_buf().unwrap().to_vec();
         let payload = match buf_id {