diff options
Diffstat (limited to 'module/ri-engine/src/main/java/io/trygvis/rules/network/IpCalc.java')
-rw-r--r-- | module/ri-engine/src/main/java/io/trygvis/rules/network/IpCalc.java | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/module/ri-engine/src/main/java/io/trygvis/rules/network/IpCalc.java b/module/ri-engine/src/main/java/io/trygvis/rules/network/IpCalc.java index e40e169..7ec344c 100644 --- a/module/ri-engine/src/main/java/io/trygvis/rules/network/IpCalc.java +++ b/module/ri-engine/src/main/java/io/trygvis/rules/network/IpCalc.java @@ -3,49 +3,4 @@ package io.trygvis.rules.network; import java.util.regex.Pattern; public class IpCalc { - private static final Pattern pattern = Pattern.compile("([0-9]{1,3})\\.([0-9]{1,3})\\.([0-9]{1,3})\\.([0-9]{1,3})/([0-9]{1,3})"); - - public static Ipv4Cidr cidr(String cidr) { - var matcher = pattern.matcher(cidr); - if (!matcher.matches()) { - throw new IllegalArgumentException("Not a CIDR: " + cidr); - } - - var b1 = matcher.group(1); - var b2 = matcher.group(2); - var b3 = matcher.group(3); - var b4 = matcher.group(4); - - int network = parse(b1) << 24 | - parse(b2) << 16 | - parse(b3) << 8 | - parse(b4); - -// System.out.printf("network = %x%n", network); - - var l = matcher.group(5); - var bits = Integer.parseInt(l); - var hostBits = 32 - bits; - int size = 1 << hostBits; - - int netmask = (-1 >> hostBits) << hostBits; -// System.out.printf("netmask = %08x%n", netmask); - - int x = network & ~netmask; - - if (x != 0) { - throw new IllegalArgumentException("Not a CIDR: " + cidr); - } - - return new Ipv4Cidr(network, netmask, size, bits); - } - - private static int parse(String s) { - var i = Integer.parseInt(s); - if (i > 255) { - throw new IllegalArgumentException("Not a CIDR"); - } - - return i; - } } |