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/*
* Copyright 2014 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.cli.net;
/**
* Known values for IPv6 extension header field that can be supplied to the CLI.
*/
public enum ExtHeader {
/** No next header. */
NOEXT((short) (1 << 0)),
/** Encapsulated Security Payload. */
ESP((short) (1 << 1)),
/** Authentication header. */
AUTH((short) (1 << 2)),
/** Destination header. */
DEST((short) (1 << 3)),
/** Fragment header. */
FRAG((short) (1 << 4)),
/** Router header. */
ROUTE((short) (1 << 5)),
/** Hop-by-hop header. */
HOP((short) (1 << 6)),
/** Unexpected repeats encountered. */
UNREP((short) (1 << 7)),
/** Unexpected sequencing encountered. */
UNSEQ((short) (1 << 8));
private short value;
/**
* Constructs an ExtHeader with the given value.
*
* @param value value to use when this ExtHeader is seen
*/
private ExtHeader(short value) {
this.value = value;
}
/**
* Gets the value to use for this ExtHeader.
*
* @return short value to use for this ExtHeader
*/
public short value() {
return this.value;
}
/**
* Parse a string input that could contain an ExtHeader value. The value
* may appear in the string either as a known exntension header name (one of the
* values of this enum), or a numeric extension header value.
*
* @param input the input string to parse
* @return the numeric value of the parsed IPv6 extension header
* @throws IllegalArgumentException if the input string does not contain a
* value that can be parsed into an IPv6 extension header
*/
public static short parseFromString(String input) {
try {
return valueOf(input).value();
} catch (IllegalArgumentException e) {
// The input is not a known IPv6 extension header name, let's see if
// it's an IPv6 extension header value (short).
// We parse with Short to handle unsigned values correctly.
try {
return Short.parseShort(input);
} catch (NumberFormatException e1) {
throw new IllegalArgumentException(
"ExtHeader value must be either a string extension header name"
+ " or an 8-bit extension header value");
}
}
}
}
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