Class DNS

The DNS Layer

Tables

DNS.new_args DNS Layer constructor arguments
DNS.OpCode Pre-defined DNS OpCodes
DNS.RCode Pre-defined DNS Return Codes
DNS.Type Pre-defined DNS Types
DNS.Class Pre-defined DNS Class

Methods

DNS:new ([args]) Create a new DNS Layer
DNS:add_query (query) Add a query to the DNS Layer
DNS:add_answer (answer) Add an answer to the DNS Layer
DNS:add_authority (authority) Add an authority answer to the DNS Layer
DNS:add_additional (additional) Add an answer in the additional section of the DNS Layer
DNS:queries () List all queries found in the Layer
DNS:answers () List all answers found in the Layer
DNS:authority () List all answers found in the Layer
DNS:additional () List all answers found in the Layer
DNS:id () Get the DNS identification value
DNS:opcode () Get the DNS OpCode
DNS:rcode () Get the DNS Return Code
DNS:qr () Get the DNS QR flag
DNS:aa () Get the DNS AA flag
DNS:tc () Get the DNS TC flag
DNS:rd () Get the DNS RD flag
DNS:ra () Get the DNS RA flag
DNS:z () Get the DNS Z flag
DNS:ad () Get the DNS AD flag
DNS:cd () Get the DNS CD flag

Class DNSQuery

DNS:new (args) Create a new DNS query
DNS.new_args Constructor arguments
DNS:print () Get this object textual representation
DNS:__tostring () see print

Class DNSAnswer

DNS:print () Get this object textual representation
DNS:__tostring () see print


Tables

DNS.new_args
DNS Layer constructor arguments

Fields:

  • id num DNS identification number
  • opcode num see OpCode
  • rcode num see RCode
  • qr bool
  • aa bool
  • tc bool
  • rd bool
  • ra bool
  • zf bool
  • ad bool
DNS.OpCode
Pre-defined DNS OpCodes

Fields:

  • Query
  • IQuery
  • Status
  • Notify
  • Update

Usage:

    DNS.OpCode.Query
DNS.RCode
Pre-defined DNS Return Codes

Fields:

  • NoError
  • FormatError
  • ServerFailure
  • NameError
  • Refused
  • YXDomain
  • YXRRSet
  • NXRRSet
  • NotAuth
  • NotZone

Usage:

    if dns:rcode() == DNS.RCode then ... end
DNS.Type
Pre-defined DNS Types

Fields:

  • A
  • AAAA
  • NS
  • CNAME
  • SOA
  • WKS
  • PTR
  • MX
  • SRV
  • A6
  • OPT
  • ANY

Usage:

    DNS.Type.A
DNS.Class
Pre-defined DNS Class

Fields:

  • IN

Usage:

    DNS.Class.IN

Methods

DNS:new ([args])
Create a new DNS Layer

Parameters:

  • args table see new_args (optional)

Returns:

    DNS dns
DNS:add_query (query)
Add a query to the DNS Layer

Parameters:

DNS:add_answer (answer)
Add an answer to the DNS Layer

Parameters:

DNS:add_authority (authority)
Add an authority answer to the DNS Layer

Parameters:

DNS:add_additional (additional)
Add an answer in the additional section of the DNS Layer

Parameters:

DNS:queries ()
List all queries found in the Layer

Returns:

    table queries a list of DNSQuery
DNS:answers ()
List all answers found in the Layer

Returns:

    table answers a list of DNSAnswer
DNS:authority ()
List all answers found in the Layer

Returns:

    table authority a list of DNSAnswer
DNS:additional ()
List all answers found in the Layer

Returns:

    table additional a list of DNSAnswer
DNS:id ()
Get the DNS identification value

Returns:

    num id
DNS:opcode ()
Get the DNS OpCode

Returns:

    num opcode
DNS:rcode ()
Get the DNS Return Code

Returns:

    num rcode
DNS:qr ()
Get the DNS QR flag

Returns:

    num qr
DNS:aa ()
Get the DNS AA flag

Returns:

    num aa
DNS:tc ()
Get the DNS TC flag

Returns:

    num tc
DNS:rd ()
Get the DNS RD flag

Returns:

    num rd
DNS:ra ()
Get the DNS RA flag

Returns:

    num ra
DNS:z ()
Get the DNS Z flag

Returns:

    num z
DNS:ad ()
Get the DNS AD flag

Returns:

    num ad
DNS:cd ()
Get the DNS CD flag

Returns:

    num cd

Class DNSQuery

A DNS Query
DNS:new (args)
Create a new DNS query

Parameters:

DNS.new_args
Constructor arguments

Fields:

DNS:print ()
Get this object textual representation

Returns:

    string
DNS:__tostring ()
see print

Class DNSAnswer

A DNS Answer
DNS:print ()
Get this object textual representation

Returns:

    string
DNS:__tostring ()
see print
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