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List of Data Types

The server support a wide range of data types, both in unlang and in the dictionaries. This page outlines the names and functionality of those data types.

Basic Data Types

There are a number of "basic" data types. These data types are fixed-size, and encapsulate simple concepts such as "integer" or "IP address".

Basic data types can be used in unlang, as they contain simple values which can be compared, or assigned to one attribute. In most cases, it is not necessary to know the name of the data type. It is possible to write values in the format you expect, The server will do "the right thing" when interpreting the values.

Table 1. Basic Data Types
Data Type Description

bool

boolean

date

calendar date

ethernet

Ethernet address

float32

32-bit floating point number

float64

64-bit floating point number

ifid

interface ID

int8

8-bit signed integer

int16

16-bit signed integer

int32

32-bit signed integer

int64

64-bit signed integer

ipaddr

IPv4 address

ipv6addr

IPv6 address

ipv4prefix

IPv4 network with address and prefix length

ipv6prefix

IPv6 network with address and prefix length

octets

raw binary, printed as hex strings

string

printable strings

time_delta

difference between two calendar dates

uint8

8-bit unsigned integer

uint16

16-bit unsigned integer

uint32

32-bit unsigned integer

uint64

64-bit unsigned integer

Structural Data Types

The following data types are "structural", in that they form parent-child relationships between attributes. These data types can only be used in the dictionaries. They cannot be used in unlang statements.

Table 2. Structural Data Types
Data Type Description

struct

structure which contains fixed-width fields

tlv

type-length-value which contains other attributes

vsa

Encapsulation of vendor-specific attributes