Module:IP/doc

local IP = require('Module:IP')

local IPAddress = IP.IPAddress

local Subnet = IP.Subnet

The IPAddress class is used to work with single IP addresses. To create a new IPAddress object:

local ipAddress = IPAddress.new(ipString)

The ipString variable can be a valid IPv4 or IPv6 address.

Examples:

local ipv4Address = IPAddress.new('1.2.3.4')

local ipv6Address = IPAddress.new('2001:db8::ff00:12:3456')

If a non-IP string or an invalid IP address is passed to the function, that returns an error. If you want to check whether a given string is an IP address and continue the procedure in the caller module, use pcall.

local isIp, ip = pcall(IPAddress.new, '1.2.3.4') -- isIp: true, ip: IPAddress object

local isIp, ip = pcall(IPAddress.new, 'Example') -- isIp: false, ip: nil

local isIp, ip = pcall(IPAddress.new, '1.2.3.256') -- isIp: false, ip: nil

IPAddress objects can be compared with relational operators:

-- Equality

IPAddress.new('1.2.3.4') == IPAddress.new('1.2.3.4') -- true

IPAddress.new('1.2.3.4') == IPAddress.new('1.2.3.5') -- false

-- Less than / greater than

IPAddress.new('1.2.3.4') < IPAddress.new('1.2.3.5') -- true

IPAddress.new('1.2.3.4') > IPAddress.new('1.2.3.5') -- false

IPAddress.new('1.2.3.4') <= IPAddress.new('1.2.3.5') -- true

IPAddress.new('1.2.3.4') <= IPAddress.new('1.2.3.4') -- true

You can use tostring on them (this is equivalent to using getIP):

tostring(IPAddress.new('1.2.3.4')) -- "1.2.3.4"

tostring(IPAddress.new('2001:db8::ff00:12:3456')) -- "2001:db8::ff00:12:3456"

-- Expanded IPv6 addresses are abbreviated:

tostring(IPAddress.new('2001:db8:0:0:0:0:0:0')) -- "2001:db8::"

You can also concatenate them:

IPAddress.new('1.2.3.4') .. ' foo' -- "1.2.3.4 foo"

IPAddress.new('1.2.3.4') .. IPAddress.new('5.6.7.8') -- "1.2.3.45.6.7.8"

IPAddress objects have several methods, outlined below.

ipAddress:getIP()

Returns a string representation of the IP address. IPv6 addresses are abbreviated if possible.

Examples:

IPAddress.new('1.2.3.4'):getIP() -- "1.2.3.4"

IPAddress.new('2001:db8::ff00:12:3456'):getIP() -- "2001:db8::ff00:12:3456"

IPAddress.new('2001:db8:0:0:0:0:0:0'):getIP() -- "2001:db8::"

ipAddress:getVersion()

Returns the version of the IP protocol being used. This is "IPv4" for IPv4 addresses, and "IPv6" for IPv6 addresses.

Examples:

IPAddress.new('1.2.3.4'):getVersion() -- "IPv4"

IPAddress.new('2001:db8::ff00:12:3456'):getVersion() -- "IPv6"

ipAddress:isIPv4()

Returns true if the IP address is an IPv4 address, and false otherwise.

Examples:

IPAddress.new('1.2.3.4'):isIPv4() -- true

IPAddress.new('2001:db8::ff00:12:3456'):isIPv4() -- false

ipAddress:isIPv6()

Returns true if the IP address is an IPv6 address, and false otherwise.

Examples:

IPAddress.new('1.2.3.4'):isIPv6() -- false

IPAddress.new('2001:db8::ff00:12:3456'):isIPv6() -- true

ipAddress:isInSubnet(subnet)

Returns true if the IP address is in the subnet subnet, and false otherwise. subnet may be a Subnet object or a CIDR string.

Examples:

IPAddress.new('1.2.3.4'):isInSubnet('1.2.3.0/24') -- true

IPAddress.new('1.2.3.4'):isInSubnet('1.2.4.0/24') -- false

IPAddress.new('1.2.3.4'):isInSubnet(Subnet.new('1.2.3.0/24')) -- true

IPAddress.new('2001:db8::ff00:12:3456'):isInSubnet('2001:db8::ff00:12:0/112') -- true

ipAddress:getSubnet(bitLength)

Returns a Subnet object for the subnet with a bit length of bitLength which contains the current IP. The bitLength parameter must be an integer between 0 and 32 for IPv4 addresses, or an integer between 0 and 128 for IPv6 addresses.

Examples:

IPAddress.new('1.2.3.4'):getSubnet(24) -- Equivalent to Subnet.new('1.2.3.0/24')

ipAddress:getNextIP()

Returns a new IPAddress object equivalent to the current IP address incremented by one. The IPv4 address "255.255.255.255" rolls around to "0.0.0.0", and the IPv6 address "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff" rolls around to "::".

Examples:

IPAddress.new('1.2.3.4'):getNextIP() -- Equivalent to IPAddress.new('1.2.3.5')

IPAddress.new('2001:db8::ff00:12:3456'):getNextIP() -- Equivalent to IPAddress.new('2001:db8::ff00:12:3457')

IPAddress.new('255.255.255.255'):getNextIP() -- Equivalent to IPAddress.new('0.0.0.0')

ipAddress:getPreviousIP()

Returns a new IPAddress object equivalent to the current IP address decremented by one. The IPv4 address "0.0.0.0" rolls around to "255.255.255.255", and the IPv6 address "::" rolls around to "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff".

Examples:

IPAddress.new('1.2.3.4'):getPreviousIP() -- Equivalent to IPAddress.new('1.2.3.3')

IPAddress.new('2001:db8::ff00:12:3456'):getPreviousIP() -- Equivalent to IPAddress.new('2001:db8::ff00:12:3455')

IPAddress.new('0.0.0.0'):getPreviousIP() -- Equivalent to IPAddress.new('255.255.255.255')

The Subnet class is used to work with subnetworks of IPv4 or IPv6 addresses. To create a new Subnet object:

local subnet = Subnet.new(cidrString)

cidrString must be a valid IPv4 or IPv6 CIDR string.

local cidr = Subnet.new('255.255.255.0/24') -- Subnet object

local cidr = Subnet.new('255.255.255.1/24') -- error

Subnet objects can be compared for equality:

Subnet.new('1.2.3.0/24') == Subnet.new('1.2.3.0/24') -- true

Subnet.new('1.2.3.0/24') == Subnet.new('1.2.3.0/25') -- false

Subnet.new('1.2.3.0/24') == Subnet.new('2001:db8::ff00:12:0/112') -- false

Subnet.new('2001:db8::ff00:12:0/112') == Subnet.new('2001:db8::ff00:12:0/112') -- true

Subnet.new('2001:db8:0:0:0:0:0:0/112') == Subnet.new('2001:db8::/112') -- true

You can use tostring on them (this is equivalent to getCIDR):

tostring(Subnet.new('1.2.3.0/24')) -- "1.2.3.0/24"

tostring(Subnet.new('2001:db8::ff00:12:0/112')) -- "2001:db8::ff00:12:0/112"

tostring(Subnet.new('2001:db8:0:0:0:0:0:0/112')) -- "2001:db8::/112"

You can also concatenate them:

Subnet.new('1.2.3.0/24') .. ' foo' -- "1.2.3.0/24 foo"

Subnet.new('1.2.3.0/24') .. Subnet.new('4.5.6.0/24') -- "1.2.3.0/244.5.6.0/24"

Subnet objects have several methods, outlined below.

subnet:getPrefix()

Returns an IPAddress object for the lowest IP address in the subnet.

Examples:

Subnet.new('1.2.3.0/24'):getPrefix() -- Equivalent to IPAddress.new('1.2.3.0')

Subnet.new('2001:db8::ff00:12:0/112'):getPrefix() -- Equivalent to IPAddress.new('2001:db8::ff00:12:0')

subnet:getHighestIP()

Returns an IPAddress object for the highest IP address in the subnet.

Examples:

Subnet.new('1.2.3.0/24'):getHighestIP() -- Equivalent to IPAddress.new('1.2.3.255')

Subnet.new('2001:db8::ff00:12:0/112'):getHighestIP() -- Equivalent to IPAddress.new('2001:db8::ff00:12:ffff')

subnet:getBitLength()

Returns the bit length of the subnet. This is an integer between 0 and 32 for IPv4 addresses, or an integer between 0 and 128 for IPv6 addresses.

Examples:

Subnet.new('1.2.3.0/24'):getBitLength() -- 24

Subnet.new('2001:db8::ff00:12:0/112'):getBitLength() -- 112

subnet:getCIDR()

Returns a CIDR string representation of the subnet.

Examples:

Subnet.new('1.2.3.0/24'):getCIDR() -- "1.2.3.0/24"

Subnet.new('2001:db8::ff00:12:0/112'):getCIDR() -- "2001:db8::ff00:12:0/112"

Subnet.new('2001:db8:0:0:0:0:0:0/112'):getCIDR() -- "2001:db8::/112"

subnet:getVersion()

Returns the version of the IP protocol being used. This is "IPv4" for IPv4 addresses, and "IPv6" for IPv6 addresses.

Examples:

Subnet.new('1.2.3.0/24'):getVersion() -- "IPv4"

Subnet.new('2001:db8::ff00:12:0/112'):getVersion() -- "IPv6"

subnet:isIPv4()

Returns true if the subnet is using IPv4, and false otherwise.

Examples:

Subnet.new('1.2.3.0/24'):isIPv4() -- true

Subnet.new('2001:db8::ff00:12:0/112'):isIPv4() -- false

subnet:isIPv6()

Returns true if the subnet is using IPv6, and false otherwise.

Examples:

Subnet.new('1.2.3.0/24'):isIPv6() -- false

Subnet.new('2001:db8::ff00:12:0/112'):isIPv6() -- true

subnet:containsIP(ip)

Returns true if the subnet contains the IP address ip, and false otherwise. ip can be an IP address string, or an IPAddress object.

Examples:

Subnet.new('1.2.3.0/24'):containsIP('1.2.3.4') -- true

Subnet.new('1.2.3.0/24'):containsIP('1.2.4.4') -- false

Subnet.new('1.2.3.0/24'):containsIP(IPAddress.new('1.2.3.4')) -- true

Subnet.new('2001:db8::ff00:12:0/112'):containsIP('2001:db8::ff00:12:3456') -- true

subnet:overlapsSubnet(subnet)

Returns true if the current subnet overlaps with subnet, and false otherwise. subnet can be a CIDR string or a subnet object.

Examples:

Subnet.new('1.2.3.0/24'):overlapsSubnet('1.2.0.0/16') -- true

Subnet.new('1.2.3.0/24'):overlapsSubnet('1.2.12.0/22') -- false

Subnet.new('1.2.3.0/24'):overlapsSubnet(Subnet.new('1.2.0.0/16')) -- true

Subnet.new('2001:db8::ff00:12:0/112'):overlapsSubnet('2001:db8::ff00:0:0/96') -- true

subnet:walk()

The walk method iterates over all of the IPAddress objects in the subnet.

Examples:

for ipAddress in Subnet.new('192.168.0.0/30'):walk() do

mw.log(tostring(ipAddress))

end

-- 192.168.0.0

-- 192.168.0.1

-- 192.168.0.2

-- 192.168.0.3

The IPv4Collection class is used to work with several different IPv4 addresses and IPv4 subnets. To create a new IPv4Collection object:

local collection = IPv4Collection.new()

IPv4Collection objects have several methods, outlined below.

collection:getVersion()

Returns the string "IPv4".

collection:addIP(ip)

Adds an IP to the collection. The IP can be either a string or an IPAddress object.

Examples:

collection:addIP('1.2.3.4')

collection:addIP(IPAddress.new('1.2.3.4'))

This method is chainable:

collection:addIP('1.2.3.4'):addIP('5.6.7.8')

collection:addSubnet(subnet)

Adds a subnet to the collection. The subnet can be either a CIDR string or a Subnet object.

Examples:

collection:addSubnet('1.2.3.0/24')

collection:addSubnet(Subnet.new('1.2.3.0/24'))

This method is chainable:

collection:addSubnet('1.2.0.0/24'):addSubnet('1.2.1.0/24')

collection:addFromString(str)

Extracts any IPv4 addresses and IPv4 CIDR subnets from str and adds them to the collection. Any text that is not an IPv4 address or CIDR subnet is ignored.

Examples:

collection:addFromString('Add some IPs and subnets: 1.2.3.4 1.2.3.5 2001:0::f foo 1.2.4.0/24')

This method is chainable:

collection:addFromString('foo 1.2.3.4'):addFromString('bar 5.6.7.8')

collection:containsIP(ip)

Returns true if the collection contains the specified IP; otherwise returns false. The ip parameter can be a string or an IPAddress object.

Examples:

collection:containsIP('1.2.3.4')

collection:containsIP(IPAddress.new('1.2.3.4'))

collection:getRanges()

Returns a sorted array of IP pairs equivalent to the collection. Each IP pair is an array representing a contiguous range of IP addresses from pair[1] to pair[2] inclusive. pair[1] and pair[2] are IPAddress objects.

Examples:

collection:addSubnet('1.2.0.0/24')

collection:addSubnet('1.2.1.0/24')

collection:addSubnet('1.2.10.0/24')

mw.logObject(collection:getRanges())

-- Logs the following:

-- table#1 {

-- table#2 {

-- 1.2.0.0,

-- 1.2.1.255,

-- },

-- table#3 {

-- 1.2.10.0,

-- 1.2.10.255,

-- },

-- }

collection:overlapsSubnet(subnet)

Returns true, obj if subnet overlaps this collection, where obj is the first IPAddress or Subnet object overlapping the subnet. Otherwise, returns false. subnet can be a CIDR string or a Subnet object.

Examples:

collection:addIP('1.2.3.4')

collection:overlapsSubnet('1.2.3.0/24') -- true, IPAddress.new('1.2.3.4')

collection:overlapsSubnet('1.2.4.0/24') -- false

The IPv6Collection class is used to work with several different IPv6 addresses and IPv6 subnets. IPv6Collection objects are directly analogous to IPv4Collection objects: they contain the same methods and work the same way, but all IP addresses and subnets added to it must be IPv6, not IPv4.

To create a new IPv6Collection object:

local collection = IPv6Collection.new()

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