diff options
Diffstat (limited to 'framework/src/onos/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/Origin.java')
| -rw-r--r-- | framework/src/onos/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/Origin.java | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/framework/src/onos/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/Origin.java b/framework/src/onos/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/Origin.java new file mode 100644 index 00000000..d642d83c --- /dev/null +++ b/framework/src/onos/protocols/bgp/bgpio/src/main/java/org/onosproject/bgpio/types/Origin.java @@ -0,0 +1,168 @@ +/* + * Copyright 2015 Open Networking Laboratory + * + * 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.bgpio.types; + +import java.util.Objects; + +import org.jboss.netty.buffer.ChannelBuffer; +import org.onosproject.bgpio.exceptions.BgpParseException; +import org.onosproject.bgpio.util.Constants; +import org.onosproject.bgpio.util.Validation; + +import com.google.common.base.MoreObjects; + +/** + * Provides Implementation of mandatory BGP Origin path attribute. + */ +public class Origin implements BgpValueType { + + /** + * Enum to provide ORIGIN types. + */ + public enum ORIGINTYPE { + IGP(0), EGP(1), INCOMPLETE(2); + int value; + /** + * Assign val with the value as the ORIGIN type. + * + * @param val ORIGIN type + */ + ORIGINTYPE(int val) { + value = val; + } + + /** + * Returns value of ORIGIN type. + * + * @return ORIGIN type + */ + public byte getType() { + return (byte) value; + } + } + + public static final byte ORIGIN_TYPE = 1; + public static final byte ORIGIN_VALUE_LEN = 1; + + private boolean isOrigin = false; + private byte origin; + + /** + * Constructor to initialize parameters. + * + * @param origin origin value + */ + public Origin(byte origin) { + this.origin = origin; + this.isOrigin = true; + } + + /** + * Returns true if origin attribute is present otherwise false. + * + * @return whether origin is present or not + */ + public boolean isOriginSet() { + return this.isOrigin; + } + + /** + * Returns type of Origin in Enum values. + * + * @return type of Origin in Enum values + */ + public ORIGINTYPE origin() { + if (this.origin == 0) { + return ORIGINTYPE.IGP; + } else if (this.origin == 1) { + return ORIGINTYPE.EGP; + } else { + return ORIGINTYPE.INCOMPLETE; + } + } + + /** + * Reads from ChannelBuffer and parses Origin. + * + * @param cb ChannelBuffer + * @return object of Origin + * @throws BgpParseException while parsing Origin path attribute + */ + public static Origin read(ChannelBuffer cb) throws BgpParseException { + ChannelBuffer tempCb = cb.copy(); + Validation parseFlags = Validation.parseAttributeHeader(cb); + + int len = parseFlags.isShort() ? parseFlags.getLength() + Constants.TYPE_AND_LEN_AS_SHORT : parseFlags + .getLength() + Constants.TYPE_AND_LEN_AS_BYTE; + ChannelBuffer data = tempCb.readBytes(len); + if ((parseFlags.getLength() > ORIGIN_VALUE_LEN) || (cb.readableBytes() < parseFlags.getLength())) { + Validation.validateLen(BgpErrorType.UPDATE_MESSAGE_ERROR, BgpErrorType.ATTRIBUTE_LENGTH_ERROR, + parseFlags.getLength()); + } + if (parseFlags.getFirstBit() && !parseFlags.getSecondBit() && parseFlags.getThirdBit()) { + throw new BgpParseException(BgpErrorType.UPDATE_MESSAGE_ERROR, BgpErrorType.ATTRIBUTE_FLAGS_ERROR, data); + } + + byte originValue; + originValue = cb.readByte(); + if ((originValue != ORIGINTYPE.INCOMPLETE.value) && (originValue != ORIGINTYPE.IGP.value) && + (originValue != ORIGINTYPE.EGP.value)) { + throw new BgpParseException(BgpErrorType.UPDATE_MESSAGE_ERROR, BgpErrorType.INVALID_ORIGIN_ATTRIBUTE, data); + } + return new Origin(originValue); + } + + @Override + public short getType() { + return ORIGIN_TYPE; + } + + @Override + public int write(ChannelBuffer cb) { + //Not required to Implement as of now + return 0; + } + + @Override + public int hashCode() { + return Objects.hash(origin); + } + + @Override + public boolean equals(Object obj) { + if (this == obj) { + return true; + } + if (obj instanceof Origin) { + Origin other = (Origin) obj; + return Objects.equals(origin, other.origin); + } + return false; + } + + @Override + public String toString() { + return MoreObjects.toStringHelper(getClass()) + .add("origin", origin) + .toString(); + } + + @Override + public int compareTo(Object o) { + // TODO Auto-generated method stub + return 0; + } +}
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