diff options
Diffstat (limited to 'module/ri-base/src/main/java/io/trygvis/rules/network/Ipv4Cidr.java')
-rw-r--r-- | module/ri-base/src/main/java/io/trygvis/rules/network/Ipv4Cidr.java | 150 |
1 files changed, 0 insertions, 150 deletions
diff --git a/module/ri-base/src/main/java/io/trygvis/rules/network/Ipv4Cidr.java b/module/ri-base/src/main/java/io/trygvis/rules/network/Ipv4Cidr.java deleted file mode 100644 index 851af95..0000000 --- a/module/ri-base/src/main/java/io/trygvis/rules/network/Ipv4Cidr.java +++ /dev/null @@ -1,150 +0,0 @@ -package io.trygvis.rules.network; - -import com.fasterxml.jackson.core.JsonGenerator; -import com.fasterxml.jackson.databind.JsonSerializer; -import com.fasterxml.jackson.databind.SerializerProvider; -import com.fasterxml.jackson.databind.annotation.JsonSerialize; - -import java.io.IOException; -import java.util.ArrayList; -import java.util.List; -import java.util.Objects; -import java.util.regex.Pattern; - -@JsonSerialize(using = Ipv4Cidr.Serializer.class) -public class Ipv4Cidr implements Comparable<Ipv4Cidr> { - public final int network; - public final int bits; - - public Ipv4Cidr(int network, int bits) { - if (bits < 0 || bits > 32) { - throw new IllegalArgumentException("bits must be [0, 32]"); - } - - int hostBits = 32 - bits; - int netmask = (-1 >> hostBits) << hostBits; - - int x = network & ~netmask; - - if (x != 0) { - throw new IllegalArgumentException("The host part of the address must be 0."); - } - - this.network = network; - this.bits = bits; - } - - @Override - public String toString() { - return "%d.%d.%d.%d/%d".formatted( - network >> 24 & 0xff, - network >> 16 & 0xff, - network >> 8 & 0xff, - network & 0xff, - bits); - } - - private String formatIpv4(int address) { - return "%d.%d.%d.%d".formatted(address >> 24 & 0xff, address >> 16 & 0xff, address >> 8 & 0xff, address & 0xff); - } - - public List<Ipv4Cidr> partition(int bits) { - if (bits <= 0 || bits <= this.bits || bits > 32) { - throw new IllegalArgumentException("Invalid new network size"); - } - - var list = new ArrayList<Ipv4Cidr>(); - - int count = 1 << (bits - this.bits); - for (int i = 0; i < count; i++) { - var network = this.network | (i << (32 - bits)); - - list.add(new Ipv4Cidr(network, bits)); - } - - return list; - } - - public List<Ipv4Address> addresses() { - int size = 1 << 32 - bits; - var end = network + size; - var addresses = new ArrayList<Ipv4Address>(size); - for (int address = network; address < end; address++) { - addresses.add(new Ipv4Address(address)); - } - - return addresses; - } - - @Override - public int compareTo(Ipv4Cidr o) { - if (this == o) { - return 0; - } - - var ret = network - o.network; - if (ret != 0) { - return ret; - } - - return bits - o.bits; - } - - @Override - public boolean equals(Object o) { - if (this == o) return true; - if (o == null || getClass() != o.getClass()) return false; - Ipv4Cidr ipv4Cidr = (Ipv4Cidr) o; - return network == ipv4Cidr.network && bits == ipv4Cidr.bits; - } - - @Override - public int hashCode() { - return Objects.hash(network, bits); - } - - 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 parseCidr(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); -// System.out.printf("netmask = %08x%n", netmask); - - return new Ipv4Cidr(network, bits); - } - - private static int parse(String s) { - var i = Integer.parseInt(s); - if (i > 255) { - throw new IllegalArgumentException("Not a CIDR"); - } - - return i; - } - - public static class Serializer extends JsonSerializer<Ipv4Cidr> { - @Override - public void serialize(Ipv4Cidr value, JsonGenerator gen, SerializerProvider serializers) throws IOException { - gen.writeStartObject(); - gen.writeObjectField("value", value.toString()); - gen.writeEndObject(); - } - } -} |