luke-else/subnet_calculator
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Adapted the create_subnet function to itterate through each octet to stop the overflows. There is however still an issue where the actual IP addresses aren't added correctly into the networks list.

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Luke Else 2023-05-12 14:17:53 +01:00
parent 924142e96c
commit 55ccf05902
1 changed files with 18 additions and 7 deletions
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23
src/networking/mod.rs
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@ -78,7 +78,7 @@ impl Network {
// Determine how many networks available
// We know that this value is >0 at this point
let num_networks = u8::pow(2, num_borrowed_bits as u32);
let num_networks = u32::pow(2, num_borrowed_bits as u32);
//Create the subnets
let mut networks = vec![IpAddr::from_arr(&base_network)?];
@ -86,12 +86,14 @@ impl Network {
// Determine the networking gaps
//If there is only 1 network, returning the base network will be sufficient
if num_networks > 1 {
let network_spacing: u8 = u8::pow(2, 8 - num_borrowed_bits as u32);
let network_spacing: u32 = u32::pow(2, 32 - network_class as u32 - num_borrowed_bits as u32);
//Add remaming subnets (-1 is because we have already added the first address)
for _ in 0..(num_networks-1) {
base_network[most_sig_octet as usize] += network_spacing;
networks.push(IpAddr::from_arr(&base_network.clone())?);
for i in 0..=(num_borrowed_bits/8) as u8{
//Add remaming subnets (-1 is because we have already added the first address)
for _ in 0..(num_networks-1) {
base_network[(most_sig_octet + i) as usize] += network_spacing as u8;
networks.push(IpAddr::from_arr(&base_network.clone())?);
}
}
}
@ -119,6 +121,7 @@ impl Network {
return Err(NetworkingErr::InvalidIPErr)
}
#[allow(unused)]
/// Function that takes in a u8 CIDR and converts it to an IP address.
///
/// ```
@ -249,5 +252,13 @@ mod tests {
let networks = Network::create_subnet(&IpAddr::V4(127, 0, 0, 0), 8).unwrap();
assert_eq!(networks.len(), 1);
assert_eq!(networks.last().unwrap(), &IpAddr::V4(127, 0, 0, 0));
let networks = Network::create_subnet(&IpAddr::V4(127, 0, 0, 0), 9).unwrap();
assert_eq!(networks.len(), 2);
assert_eq!(networks.first().unwrap(), &IpAddr::V4(127, 0, 0, 0));
let networks = Network::create_subnet(&IpAddr::V4(127, 0, 0, 0), 17).unwrap();
assert_eq!(networks.last().unwrap(), &IpAddr::V4(127, 0, 0, 0));
assert_eq!(networks.len(), 1);
}
}