First implementation of BNG application
The application offers network level APIs for the BNG data plane.
An attachment (BngAttachment) at network level is identified by an arbitrary string.
The exposed APIs are key-value like APIs.
Change-Id: If0e484f487ea16dd8c7dd99642f75686e1dbc29a
diff --git a/app/src/main/java/org/opencord/bng/packets/GenericPpp.java b/app/src/main/java/org/opencord/bng/packets/GenericPpp.java
new file mode 100644
index 0000000..464bf2d
--- /dev/null
+++ b/app/src/main/java/org/opencord/bng/packets/GenericPpp.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2019-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.opencord.bng.packets;
+
+import com.google.common.base.Objects;
+import org.onlab.packet.Data;
+import org.onlab.packet.Deserializer;
+
+import java.nio.ByteBuffer;
+
+import static org.onlab.packet.PacketUtils.checkInput;
+
+/**
+ * Implements the Link Control Protocol (LCP) header.
+ */
+
+public class GenericPpp extends Ppp {
+
+ // TODO: Add support for TLV options.
+
+ public static final byte CHAP_CODE_CHALLENGE = 0x01;
+ public static final byte CHAP_CODE_RESPONSE = 0x02;
+ public static final byte CHAP_CODE_SUCCESS = 0x03;
+ public static final byte CHAP_CODE_FAILURE = 0x04;
+
+ public static final byte PAP_AUTH_REQ = 0x01;
+ public static final byte PAP_AUTH_ACK = 0x02;
+ public static final byte PAP_AUTH_NACK = 0x03;
+
+ public static final byte CODE_TERM_REQ = 0x05;
+ public static final byte CODE_TERM_ACK = 0x06;
+
+
+ /**
+ * Deserializer function for LCP packets.
+ *
+ * @return deserializer function
+ */
+ public static Deserializer<GenericPpp> deserializer() {
+ return (data, offset, length) -> {
+ checkInput(data, offset, length, MIN_HEADER_LENGTH);
+ GenericPpp ppp = new GenericPpp();
+ final ByteBuffer bb = ByteBuffer.wrap(data, offset, length);
+ ppp.code = bb.get();
+ ppp.identifier = bb.get();
+ ppp.length = bb.getShort();
+ if (ppp.length > MIN_HEADER_LENGTH) {
+ ppp.payload = Data.deserializer()
+ .deserialize(data, bb.position(),
+ Math.min(bb.limit() - bb.position(),
+ ppp.length - MIN_HEADER_LENGTH));
+ ppp.payload.setParent(ppp);
+ }
+ return ppp;
+ };
+ }
+
+ @Override
+ public byte[] serialize() {
+ byte[] payloadData = null;
+ int payloadLength = 0;
+ if (this.payload != null) {
+ this.payload.setParent(this);
+ payloadData = this.payload.serialize();
+ payloadLength = payloadData.length + MIN_HEADER_LENGTH;
+ }
+ int realLength = this.length > payloadLength ? this.length : payloadLength;
+ final byte[] data = new byte[realLength];
+ final ByteBuffer bb = ByteBuffer.wrap(data);
+ bb.put(this.code);
+ bb.put(this.identifier);
+ bb.putShort(this.length);
+ if (payloadData != null) {
+ bb.put(payloadData);
+ }
+ return data;
+ }
+
+ @Override
+ public int hashCode() {
+ return 31 * super.hashCode() + Objects.hashCode(code, identifier, length);
+ }
+
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj) {
+ return true;
+ }
+ if (obj == null || getClass() != obj.getClass()) {
+ return false;
+ }
+ if (!super.equals(obj)) {
+ return false;
+ }
+ final GenericPpp other = (GenericPpp) obj;
+ return Objects.equal(this.code, other.code)
+ && Objects.equal(this.identifier, other.identifier)
+ && Objects.equal(this.length, other.length);
+ }
+}
+