[optimize] Packet Decode

1. Add a macro to obtain Packet’s encapsulation information (the returned data is an immutable reference to Packet)
    * get_innermost_special_encapsulation!()
    * get_outermost_special_encapsulation!()

    Example: let icmp_encapsulation : Option<&Encapsulation> = get_innermost_special_encapsulation!(&Packet, ICMP);
    Example: let l4_encapsulation   : Option<&Encapsulation> = get_innermost_special_encapsulation!(&Packet, TCP | UDP);

2. Clean up the Clone/Copy Trait of PacketDecode to avoid memory copies caused by improper use by users.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/plugin/example.rs b/src/plugin/example.rs
index 7a4d4ec..a7afb5b 100644
--- a/src/plugin/example.rs
+++ b/src/plugin/example.rs
@@ -53,7 +53,7 @@ impl EventHandle for ExamplePulgin {
         match event {
             Event::TCPOpeningEvent => {
                 println!("{} handle TCPOpeningEvent: {:?}", self.plugin_name, session);
-                let (src_port, dst_port) = packet.unwrap().get_inner_most_port().unwrap();
+                let (src_port, dst_port) = packet.unwrap().get_innermost_port().unwrap();
                 if src_port == 80 || dst_port == 80 {
                     println!("{} add HTTPRequestEvent", self.plugin_name);
                     queue.add(Event::HTTPRequestEvent, Some(session));