add mac address struct

src/etherparser/mod.rs

 pub mod ether_type;
-
 pub mod ethernet;
-
-
 pub mod packet;
-
 pub mod tools;
+
+pub mod net;
+pub use net::MacAddr;

src/etherparser/net/mac_address.rs

+pub struct MacAddr {
+    mac: [u8; 6],
+}
+
+impl MacAddr {
+    pub fn new(mac: [u8; 6]) -> Self {
+        Self { mac }
+    }
+}
+
+impl From<MacAddr> for u64 {
+    fn from(value: MacAddr) -> Self {
+        let mut byte: u64 = 0;
+        for i in 0..6 {
+            byte = byte << 8;
+            byte += value.mac[i] as u64;
+        }
+        byte
+    }
+}
+
+impl From<u64> for MacAddr {
+    fn from(value: u64) -> Self {
+        let mut mac = [0u8; 6];
+        for i in 0..6 {
+            mac[i] = (value >> (i * 8)) as u8;
+        }
+        Self { mac }
+    }
+}
+
+impl From<&str> for MacAddr {
+    fn from(value: &str) -> Self {
+        let mac_vec = value
+            .split(":")
+            .map(|x| match u8::from_str_radix(x, 16) {
+                Ok(v) => v,
+                Err(_) => 0,
+            })
+            .collect::<Vec<u8>>();
+        let mut mac = [0u8; 6];
+        for i in 0..6 {
+            mac[i] = mac_vec[i];
+        }
+        Self { mac }
+    }
+}

src/etherparser/net/mod.rs

+pub mod mac_address;
+pub use mac_address::MacAddr;
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