com.adventnet.snmp.snmp2
Class ASNTypes

java.lang.Object
  com.adventnet.snmp.snmp2.ASNTypes

 class ASNTypes
extends java.lang.Object

Container for ASN utility Functions and Parameters. API Users will not need to use this class directly. This class has all it's methods and variables static and does not need to be instantiated.

Field Summary

(package private) static byte	ASN_APPLICATION
(package private) static byte	ASN_BIT_STR
(package private) static byte	ASN_BIT8
(package private) static byte	ASN_BOOLEAN
(package private) static byte	ASN_CONSTRUCTOR
(package private) static byte	ASN_CONTEXT
(package private) static int	ASN_EXCEPTION
(package private) static byte	ASN_EXTENSION_ID
(package private) static byte	ASN_INTEGER
(package private) static byte	ASN_LONG_LEN
(package private) static byte	ASN_NULL
(package private) static byte	ASN_OBJECT_ID
(package private) static byte	ASN_OCTET_STR
(package private) static byte	ASN_PRIMITIVE
(package private) static byte	ASN_PRIVATE
(package private) static byte	ASN_SEQUENCE
(package private) static byte	ASN_SET
(package private) static byte	ASN_UNIVERSAL
(package private) static int	MAX_OID_LEN
(package private) static int	MAX_SUBID

Constructor Summary

ASNTypes()

Method Summary

(package private) static int	byteToInt(byte b) Since JAVA does not support unsigned types, we need a converter from unsigned byte to int that preserves the last 8 bits.
(package private) static int	encodeInt(byte[] buff, int space, int value, int id) Encodes a signed 32-bit integer with the specified id (tag).
(package private) static int	encodeInt(byte[] buff, int space, long value, int id) Encodes a signed 64-bit integer with the specified id (tag).
(package private) static int	encodeNull(byte[] buff, int space, int id) Encodes a null value with the specified id (tag).
(package private) static int	encodeOctets(byte[] buff, int space, byte[] octets, int offset, int count, int id) Encodes an octet string with the specified id (tag).
(package private) static int	encodeOid(byte[] buff, int space, int[] oid, int count, int id) Encodes an object identifier with the specified id (tag).
(package private) static int	encodeSequence(byte[] buff, int space, int length, int id) Encodes a Sequence or Sequence of with the specified id (tag).
(package private) static int	encodeString(byte[] buff, int space, java.lang.String string, int offset, int count, int id) Encodes n Java string with the specified id (tag).
(package private) static int	encodeUInt(byte[] buff, int space, int value, int id) Encodes an unsigned 32-bit integer with the specified id (tag).
(package private) static int	encodeUInt(byte[] buff, int space, long[] val, int id) Encodes an unsigned 64-bit integer with the specified id (tag).
(package private) static byte[]	encodeVariable(SnmpVar var) This is a convenience routine used to get the encoding for an SnmpVar object.
(package private) static boolean	IS_CONSTRUCTOR(byte b)
(package private) static boolean	IS_EXTENSION_ID(byte b)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAX_SUBID

static int MAX_SUBID

MAX_OID_LEN

static int MAX_OID_LEN

ASN_BOOLEAN

static final byte ASN_BOOLEAN

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Constant Field Values

ASN_INTEGER

static final byte ASN_INTEGER

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Constant Field Values

ASN_BIT_STR

static final byte ASN_BIT_STR

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Constant Field Values

ASN_OCTET_STR

static final byte ASN_OCTET_STR

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Constant Field Values

ASN_NULL

static final byte ASN_NULL

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Constant Field Values

ASN_OBJECT_ID

static final byte ASN_OBJECT_ID

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Constant Field Values

ASN_SEQUENCE

static final byte ASN_SEQUENCE

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Constant Field Values

ASN_SET

static final byte ASN_SET

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Constant Field Values

ASN_UNIVERSAL

static final byte ASN_UNIVERSAL

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Constant Field Values

ASN_APPLICATION

static final byte ASN_APPLICATION

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Constant Field Values

ASN_CONTEXT

static final byte ASN_CONTEXT

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Constant Field Values

ASN_PRIVATE

static final byte ASN_PRIVATE

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Constant Field Values

ASN_EXCEPTION

static final int ASN_EXCEPTION

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Constant Field Values

ASN_PRIMITIVE

static final byte ASN_PRIMITIVE

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Constant Field Values

ASN_CONSTRUCTOR

static final byte ASN_CONSTRUCTOR

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Constant Field Values

ASN_LONG_LEN

static final byte ASN_LONG_LEN

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Constant Field Values

ASN_EXTENSION_ID

static final byte ASN_EXTENSION_ID

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Constant Field Values

ASN_BIT8

static final byte ASN_BIT8

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Constant Field Values

Constructor Detail

ASNTypes

ASNTypes()

Method Detail

byteToInt

static int byteToInt(byte b)

Since JAVA does not support unsigned types, we need a converter from unsigned byte to int that preserves the last 8 bits.

Parameters:

b - the byte to convert

Returns:

the integer value of the byte

IS_CONSTRUCTOR

static boolean IS_CONSTRUCTOR(byte b)

IS_EXTENSION_ID

static boolean IS_EXTENSION_ID(byte b)

encodeInt

static int encodeInt(byte[] buff,
                     int space,
                     int value,
                     int id)
              throws java.lang.ArrayIndexOutOfBoundsException

Encodes a signed 32-bit integer with the specified id (tag).

Parameters:

buff - The buffer into which the value is to be encoded

space - The number of free bytes in the buffer

value - The integer value to be encoded

id - The ASN.1 BER id (or tag)

Returns:

The number of free bytes in the buffer

Throws:

java.lang.ArrayIndexOutOfBoundsException - When there is insufficient space in buffer

encodeInt

static int encodeInt(byte[] buff,
                     int space,
                     long value,
                     int id)
              throws java.lang.ArrayIndexOutOfBoundsException

Encodes a signed 64-bit integer with the specified id (tag).

Parameters:

buff - The buffer into which the value is to be encoded

space - The number of free bytes in the buffer

value - The integer value to be encoded

id - The ASN.1 BER id (or tag)

Returns:

The number of free bytes in the buffer

Throws:

java.lang.ArrayIndexOutOfBoundsException - When there is insufficient space in buffer

encodeUInt

static int encodeUInt(byte[] buff,
                      int space,
                      int value,
                      int id)
               throws java.lang.ArrayIndexOutOfBoundsException

Encodes an unsigned 32-bit integer with the specified id (tag).

Parameters:

buff - The buffer into which the value is to be encoded

space - The number of free bytes in the buffer

value - The unsigned integer value to be encoded

id - The ASN.1 BER id (or tag)

Returns:

The number of free bytes in the buffer

Throws:

java.lang.ArrayIndexOutOfBoundsException - When there is insufficient space in buffer

encodeUInt

static int encodeUInt(byte[] buff,
                      int space,
                      long[] val,
                      int id)
               throws java.lang.ArrayIndexOutOfBoundsException

Encodes an unsigned 64-bit integer with the specified id (tag).

Parameters:

buff - The buffer into which the value is to be encoded

space - The number of free bytes in the buffer

value - The unsigned integer value to be encoded

id - The ASN.1 BER id (or tag)

Returns:

The number of free bytes in the buffer

Throws:

java.lang.ArrayIndexOutOfBoundsException - When there is insufficient space in buffer

encodeOctets

static int encodeOctets(byte[] buff,
                        int space,
                        byte[] octets,
                        int offset,
                        int count,
                        int id)
                 throws java.lang.ArrayIndexOutOfBoundsException

Encodes an octet string with the specified id (tag).

Parameters:

buff - The buffer into which the value is to be encoded

space - The number of free bytes in the buffer

octets - The octet string to be encoded (may be null)

offset - The offset of the first byte of octets to be encoded

count - The number of bytes of octets to be encoded

id - The ASN.1 BER id (or tag)

Returns:

The number of free bytes in the buffer

Throws:

java.lang.ArrayIndexOutOfBoundsException - When there is insufficient space in buffer

encodeString

static int encodeString(byte[] buff,
                        int space,
                        java.lang.String string,
                        int offset,
                        int count,
                        int id)
                 throws java.lang.ArrayIndexOutOfBoundsException

Encodes n Java string with the specified id (tag).

Parameters:

buff - The buffer into which the value is to be encoded

space - The number of free bytes in the buffer

string - The Java string to be encoded (may be null)

offset - The offset of the first char of octets to be encoded

count - The number of chars of octets to be encoded

id - The ASN.1 BER id (or tag)

Returns:

The number of free bytes in the buffer

Throws:

java.lang.ArrayIndexOutOfBoundsException - When there is insufficient space in buffer

encodeOid

static int encodeOid(byte[] buff,
                     int space,
                     int[] oid,
                     int count,
                     int id)
              throws java.lang.ArrayIndexOutOfBoundsException

Encodes an object identifier with the specified id (tag).

Parameters:

buff - The buffer into which the value is to be encoded

space - The number of free bytes in the buffer

oid - The object identifier to be encoded

count - The number of elements of oid to be encoded

id - The ASN.1 BER id (or tag)

Returns:

The number of free bytes in the buffer

Throws:

java.lang.ArrayIndexOutOfBoundsException - When there is insufficient space in buffer

encodeNull

static int encodeNull(byte[] buff,
                      int space,
                      int id)
               throws java.lang.ArrayIndexOutOfBoundsException

Encodes a null value with the specified id (tag).

Parameters:

buff - The buffer into which the value is to be encoded

space - The number of free bytes in the buffer

id - The ASN.1 BER id (or tag)

Returns:

The number of free bytes in the buffer

Throws:

java.lang.ArrayIndexOutOfBoundsException - When there is insufficient space in buffer

encodeSequence

static int encodeSequence(byte[] buff,
                          int space,
                          int length,
                          int id)
                   throws java.lang.ArrayIndexOutOfBoundsException

Encodes a Sequence or Sequence of with the specified id (tag).

Parameters:

buff - The buffer into which the value is to be encoded

space - The number of free bytes in the buffer

length - The length of the sequence

id - The ASN.1 BER id (or tag)

Returns:

The number of free bytes in the buffer

Throws:

java.lang.ArrayIndexOutOfBoundsException - When there is insufficient space in buffer

encodeVariable

static byte[] encodeVariable(SnmpVar var)

This is a convenience routine used to get the encoding for an SnmpVar object. It just returns a byte array representing the encoding

Parameters:

var - The SnmpVar objet which needs to be encoded.

Returns:

the byte array corresponding to the encoding.