#2 Added new function to convert an IPv4 Address to an Unsigned 32-bit interger. Also did some small bits of code cleanup

src/networking/ip.rs

@@ -56,6 +56,27 @@ impl IpAddr {
     pub fn from_arr(arr: &[u8; 4]) -> Result<IpAddr, NetworkingErr> {
         Ok(IpAddr::V4(arr[0], arr[1], arr[2], arr[3]))
     }
+
+    /// Function that converts an IPv4 Address into an unsigned
+    /// 32-bit integer.
+    /// 
+    /// # Limitation
+    /// Currently only works for IPs of type IPv4 
+    /// # Example
+    /// ```
+    /// let ip: IpAddr = IpAddr::V4(127, 0, 0, 1);
+    /// 
+    /// let ip_u32: u32 = ip.to_u32();
+    /// ip_u32 = 2130706433;
+    /// ```
+    pub fn to_u32(&self) -> Result<u32, NetworkingErr> {
+        let mut ip: u32 = 0;
+        let ip_addr = self.to_arr()?;
+        for (i, oct) in ip_addr.iter().enumerate() {
+            ip += (*oct as u32) * u32::pow(2, (ip_addr.len() as u32 - (i as u32 + 1)) * 8);
+        }
+        Ok(ip)
+    }
 }
 
 impl ToString for IpAddr {
@@ -166,4 +187,22 @@ mod tests {
         let ip_addr: [u8; 4] = [127, 0, 0, 1];
         assert_eq!(IpAddr::from_arr(&ip_addr).unwrap(), IpAddr::V4(127, 0, 0, 1));
     }
+
+    #[test]
+    /// Tests the conversion of an IPv4 Address to
+    /// an unsigned 32-bit integer
+    fn ipaddr_to_u32() {
+        use super::*;
+        let ip = IpAddr::V4(0, 0, 0, 0);
+        assert_eq!(0, ip.to_u32().unwrap());
+        
+        let ip = IpAddr::V4(127, 0, 0, 1);
+        assert_eq!(2_130_706_433, ip.to_u32().unwrap());
+
+        let ip = IpAddr::V4(10, 10, 10, 0);
+        assert_eq!(168_430_080, ip.to_u32().unwrap());
+
+        let ip = IpAddr::V4(255, 255, 255, 255);
+        assert_eq!(u32::MAX, ip.to_u32().unwrap());
+    }
 }

src/networking/mod.rs

@@ -55,7 +55,6 @@ impl Network {
         //Get number of host and network bits.
         let network_class = Network::get_network_class(network_address)?;
         let network_address = network_address.to_arr()?;
-        //let subnet_mask = Network::gen_subnet_mask(cidr)?.to_arr()?;
 
         // If the CIDR < class network enum associated value, then there is an invalid subnet.
         if cidr < network_class as u8 {
@@ -76,7 +75,7 @@ impl Network {
             base_network[i as usize] = 0;
         }
 
-        // Determine how many networks available
+        // Determine how many networks are available
         // We know that this value is >0 at this point
         let num_networks = u32::pow(2, num_borrowed_bits as u32);