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Implement is_subnet_of and is_supernet_of

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This commit is contained in:
Abhishek Chanda
2019-02-06 23:12:47 +00:00
parent b2c458e6f1
commit 439a0deeb7
3 changed files with 87 additions and 0 deletions
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41
src/ipv4.rs
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@ -62,6 +62,16 @@ impl Ipv4Network {
self.prefix
}
/// Checks if the given `Ipv4Network` is a subnet of the other.
pub fn is_subnet_of(self, other: Ipv4Network) -> bool {
other.ip() <= self.ip() && other.broadcast() >= self.broadcast()
}
/// Checks if the given `Ipv4Network` is a supernet of the other.
pub fn is_supernet_of(self, other: Ipv4Network) -> bool {
other.is_subnet_of(self)
}
/// Returns the mask for this `Ipv4Network`.
/// That means the `prefix` most significant bits will be 1 and the rest 0
///
@ -454,4 +464,35 @@ mod test {
fn assert_sync<T: Sync>() {}
assert_sync::<Ipv4Network>();
}
// Tests from cpython https://github.com/python/cpython/blob/e9bc4172d18db9c182d8e04dd7b033097a994c06/Lib/test/test_ipaddress.py
#[test]
fn test_is_subnet_of() {
let mut test_cases: HashMap<(Ipv4Network, Ipv4Network), bool> = HashMap::new();
test_cases.insert(("10.0.0.0/30".parse().unwrap(), "10.0.1.0/24".parse().unwrap()), false);
test_cases.insert(("10.0.0.0/30".parse().unwrap(), "10.0.0.0/24".parse().unwrap()), true);
test_cases.insert(("10.0.0.0/30".parse().unwrap(), "10.0.1.0/24".parse().unwrap()), false);
test_cases.insert(("10.0.1.0/24".parse().unwrap(), "10.0.0.0/30".parse().unwrap()), false);
for (key, val) in test_cases.iter() {
let (src, dest) = (key.0, key.1);
assert_eq!(src.is_subnet_of(dest), *val, "testing with {} and {}", src, dest);
}
}
#[test]
fn test_is_supernet_of() {
let mut test_cases: HashMap<(Ipv4Network, Ipv4Network), bool> = HashMap::new();
test_cases.insert(("10.0.0.0/30".parse().unwrap(), "10.0.1.0/24".parse().unwrap()), false);
test_cases.insert(("10.0.0.0/30".parse().unwrap(), "10.0.0.0/24".parse().unwrap()), false);
test_cases.insert(("10.0.0.0/30".parse().unwrap(), "10.0.1.0/24".parse().unwrap()), false);
test_cases.insert(("10.0.0.0/24".parse().unwrap(), "10.0.0.0/30".parse().unwrap()), true);
for (key, val) in test_cases.iter() {
let (src, dest) = (key.0, key.1);
assert_eq!(src.is_supernet_of(dest), *val, "testing with {} and {}", src, dest);
}
}
}