Class: Net::SNMP::Varbind

Inherits:
Object
  • Object
show all
Defined in:
lib/net/snmp/varbind.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(ptr = nil) ⇒ Varbind

Returns a new instance of Varbind.



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# File 'lib/net/snmp/varbind.rb', line 7

def initialize(ptr = nil)
  @struct = Net::SNMP::Wrapper::VariableList.new(ptr)
end

Instance Attribute Details

#struct ⇒ Object

Represents an SNMP Variable Binding



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# File 'lib/net/snmp/varbind.rb', line 5

def struct
  @struct
end

Class Method Details

.from_pointer(ptr) ⇒ Object 



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# File 'lib/net/snmp/varbind.rb', line 11

def self.from_pointer(ptr)
  new(ptr)
end

Instance Method Details

#object_type ⇒ Object Also known as: type

Returns the data type of the varbind



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# File 'lib/net/snmp/varbind.rb', line 16

def object_type
  @struct.type
end

#oid ⇒ Object

Returns the OID associated with the varbind



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# File 'lib/net/snmp/varbind.rb', line 22

def oid
  @oid ||= OID.from_pointer(@struct.name, @struct.name_length)
end

#value ⇒ Object

Returns the value of the varbind



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# File 'lib/net/snmp/varbind.rb', line 27

def value
  case object_type
  when Constants::ASN_OCTET_STR, Constants::ASN_OPAQUE
    struct.val[:string].read_string(struct.val_len)
  when Constants::ASN_INTEGER
    struct.val[:integer].read_long
  when Constants::ASN_UINTEGER, Constants::ASN_TIMETICKS,  Constants::ASN_COUNTER, Constants::ASN_GAUGE
    struct.val[:integer].read_ulong
  when Constants::ASN_IPADDRESS
    struct.val[:objid].read_string(struct.val_len).unpack('CCCC').join(".")
  when Constants::ASN_NULL
    nil
  when Constants::ASN_OBJECT_ID
    Net::SNMP::OID.from_pointer(struct.val[:objid], struct.val_len / OID.oid_size)
  when Constants::ASN_COUNTER64
    counter = Wrapper::Counter64.new(struct.val[:counter64])
    counter.high * 2^32 + counter.low
  when Constants::ASN_BIT_STR
    # XXX not sure what to do here.  Is this obsolete?
  when Constants::SNMP_ENDOFMIBVIEW
    :endofmibview
  when Constants::SNMP_NOSUCHOBJECT
    :nosuchobject
  when Constants::SNMP_NOSUCHINSTANCE
    :nosuchinstance
  else
    raise Net::SNMP::Error.new, "Unknown value type #{object_type}"
  end
end