feat: added tcp

sorry Judah

packets/src/lib.rs

@@ -78,6 +78,10 @@ impl<'a> EthernetPkt<'a> {
             data: self.data.to_vec(),
         }
     }
+
+    pub fn raw(&self) -> &[u8] {
+        self.data
+    }
 }
 
 pub enum Layer3Pkt<'a> {
@@ -425,6 +429,10 @@ impl EthernetPacket {
     pub fn pkt(&'_ self) -> EthernetPkt<'_> {
         EthernetPkt { data: &self.data }
     }
+
+    pub fn from_raw(data: Vec<u8>) -> EthernetPacket {
+        Self { data }
+    }
 }
 
 #[derive(Clone)]