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/Ppp.java b/app/src/main/java/org/opencord/bng/packets/Ppp.java
new file mode 100644
index 0000000..3785d51
--- /dev/null
+++ b/app/src/main/java/org/opencord/bng/packets/Ppp.java
@@ -0,0 +1,121 @@
+/*
+ * 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.BasePacket;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
+/**
+ * Implements a generic PPP header.
+ */
+
+public abstract class Ppp extends BasePacket {
+
+ static final int MIN_HEADER_LENGTH = 4;
+
+ byte code;
+ byte identifier;
+ short length; // Length includes the code, identifier, length and data fields
+
+ /**
+ * Gets the LCP code.
+ *
+ * @return the LCP code
+ */
+ public byte getCode() {
+ return code;
+ }
+
+ /**
+ * Sets the LCP code.
+ *
+ * @param code the LCP code to set
+ */
+ public void setCode(byte code) {
+ this.code = code;
+ }
+
+ /**
+ * Gets the LCP identifier.
+ *
+ * @return the LCP identifier
+ */
+ public byte getIdentifier() {
+ return identifier;
+ }
+
+ /**
+ * Sets the LCP identifier.
+ *
+ * @param identifier the LCP identifier to set
+ */
+ public void setIdentifier(byte identifier) {
+ this.identifier = identifier;
+ }
+
+ /**
+ * Gets the length.
+ *
+ * @return the length
+ */
+ public short getLength() {
+ return length;
+ }
+
+ /**
+ * Sets the length.
+ *
+ * @param length the length to set
+ */
+ public void setLength(short length) {
+ this.length = length;
+ }
+
+ @Override
+ public String toString() {
+ return toStringHelper(getClass())
+// .add("PPPType", pppProtocol)
+ .add("code", code)
+ .add("identifier", identifier)
+ .add("length", length)
+ .toString();
+ }
+
+ @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 Ppp other = (Ppp) obj;
+ return Objects.equal(this.code, other.code)
+ && Objects.equal(this.identifier, other.identifier)
+ && Objects.equal(this.length, other.length);
+ }
+}