| /* |
| * Copyright 2021-present Open Networking Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.onosproject.net.behaviour.upf; |
| |
| import org.onlab.packet.Ip4Address; |
| import org.onlab.packet.Ip4Prefix; |
| |
| import java.util.Objects; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * A UPF device interface, such as a S1U or UE IP address pool. |
| */ |
| public final class UpfInterface { |
| private final Ip4Prefix prefix; |
| private final Type type; |
| |
| private UpfInterface(Ip4Prefix prefix, Type type) { |
| this.prefix = prefix; |
| this.type = type; |
| } |
| |
| public static Builder builder() { |
| return new Builder(); |
| } |
| |
| @Override |
| public String toString() { |
| String typeStr; |
| if (type.equals(Type.ACCESS)) { |
| typeStr = "Access"; |
| } else if (type.equals(Type.CORE)) { |
| typeStr = "Core"; |
| } else if (type.equals(Type.DBUF)) { |
| typeStr = "Dbuf-Receiver"; |
| } else { |
| typeStr = "UNKNOWN"; |
| } |
| return String.format("Interface{%s, %s}", typeStr, prefix); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == this) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (getClass() != obj.getClass()) { |
| return false; |
| } |
| UpfInterface that = (UpfInterface) obj; |
| return (this.type.equals(that.type) && |
| this.prefix.equals(that.prefix)); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(prefix, type); |
| } |
| |
| /** |
| * Create a core-facing UPF Interface from the given address, which will be treated as a /32 prefix. |
| * |
| * @param address the address of the new core-facing interface |
| * @return a new UPF interface |
| */ |
| public static UpfInterface createS1uFrom(Ip4Address address) { |
| return builder().setAccess().setPrefix(Ip4Prefix.valueOf(address, 32)).build(); |
| } |
| |
| /** |
| * Create a core-facing UPF Interface from the given IP prefix. |
| * |
| * @param prefix the prefix of the new core-facing interface |
| * @return a new UPF interface |
| */ |
| public static UpfInterface createUePoolFrom(Ip4Prefix prefix) { |
| return builder().setCore().setPrefix(prefix).build(); |
| } |
| |
| /** |
| * Create a dbuf-receiving UPF interface from the given IP address. |
| * |
| * @param address the address of the dbuf-receiving interface |
| * @return a new UPF interface |
| */ |
| public static UpfInterface createDbufReceiverFrom(Ip4Address address) { |
| return UpfInterface.builder().setDbufReceiver().setAddress(address).build(); |
| } |
| |
| /** |
| * Get the IP prefix of this interface. |
| * |
| * @return the interface prefix |
| */ |
| public Ip4Prefix prefix() { |
| return prefix; |
| } |
| |
| /** |
| * Check if this UPF interface is for packets traveling from UEs. |
| * This will be true for S1U interface table entries. |
| * |
| * @return true if interface receives from access |
| */ |
| public boolean isAccess() { |
| return type == Type.ACCESS; |
| } |
| |
| /** |
| * Check if this UPF interface is for packets traveling towards UEs. |
| * This will be true for UE IP address pool table entries. |
| * |
| * @return true if interface receives from core |
| */ |
| public boolean isCore() { |
| return type == Type.CORE; |
| } |
| |
| |
| /** |
| * Check if this UPF interface is for receiving buffered packets as they are released from the dbuf |
| * buffering device. |
| * |
| * @return true if interface receives from dbuf |
| */ |
| public boolean isDbufReceiver() { |
| return type == Type.DBUF; |
| } |
| |
| /** |
| * Get the IPv4 prefix of this UPF interface. |
| * |
| * @return the interface prefix |
| */ |
| public Ip4Prefix getPrefix() { |
| return this.prefix; |
| } |
| |
| public enum Type { |
| /** |
| * Unknown UPF interface type. |
| */ |
| UNKNOWN, |
| |
| /** |
| * Interface that receives GTP encapsulated packets. |
| * This is the type of the S1U interface. |
| */ |
| ACCESS, |
| |
| /** |
| * Interface that receives unencapsulated packets from the core of the network. |
| * This is the type of UE IP address pool interfaces. |
| */ |
| CORE, |
| |
| /** |
| * Interface that receives buffered packets as they are drained from a dbuf device. |
| */ |
| DBUF |
| } |
| |
| public static class Builder { |
| private Ip4Prefix prefix; |
| private Type type; |
| |
| public Builder() { |
| type = Type.UNKNOWN; |
| } |
| |
| /** |
| * Set the IPv4 prefix of this interface. |
| * |
| * @param prefix the interface prefix |
| * @return this builder object |
| */ |
| public Builder setPrefix(Ip4Prefix prefix) { |
| this.prefix = prefix; |
| return this; |
| } |
| |
| /** |
| * Set the IPv4 prefix of this interface, by turning the given address into a /32 prefix. |
| * |
| * @param address the interface address that will become a /32 prefix |
| * @return this builder object |
| */ |
| public Builder setAddress(Ip4Address address) { |
| this.prefix = Ip4Prefix.valueOf(address, 32); |
| return this; |
| } |
| |
| /** |
| * Make this an access-facing interface. |
| * |
| * @return this builder object |
| */ |
| public Builder setAccess() { |
| this.type = Type.ACCESS; |
| return this; |
| } |
| |
| /** |
| * Make this a core-facing interface. |
| * |
| * @return this builder object |
| */ |
| public Builder setCore() { |
| this.type = Type.CORE; |
| return this; |
| } |
| |
| /** |
| * Make this a dbuf-facing interface. |
| * |
| * @return this builder object |
| */ |
| public Builder setDbufReceiver() { |
| this.type = Type.DBUF; |
| return this; |
| } |
| |
| public UpfInterface build() { |
| checkNotNull(prefix); |
| return new UpfInterface(prefix, type); |
| } |
| } |
| } |