Module:IPAddress: Difference between revisions
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MusikAnimal (talk | contribs) m Protected "Module:IPAddress": High-risk module ([Edit=Require template editor access] (indefinite)) |
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Revision as of 17:19, October 10, 2017
This Lua module is used in MediaWiki:Newarticletext and MediaWiki:Blockedtext. Changes to it can cause immediate changes to the Wikipedia user interface. To avoid major disruption, any changes should be tested in the module's /sandbox or /testcases subpages, or in your own module sandbox. The tested changes can be added to this page in a single edit. Please discuss changes on the talk page before implementing them. |
Functions are not "local", so other modules can require this module and call them directly. We return an object with 3 small stub functions to call the real ones so that the functions can be called from templates also.
Only dotted decimal notation for IPv4 supported. Does not support dotted hexadecimal, dotted octal, or single-number formats (see IPv4#Address_representations).
Unit tests at Module:IPAddress/testcases
--[=[
Functions are not "local", so other modules can require this module and call them directly.
We return an object with 3 small stub functions to call the real ones so that the functions
can be called from templates also.
Only [[dotted decimal]] notation for IPv4 supported. Does not support
dotted hexadecimal, dotted octal, or single-number formats (see [[IPv4#Address_representations]]).
Unit tests at Module:IPAddress/tests
]=]
function _isIpV6( s )
local dcolon, groups
if type( s ) ~= "string"
or s:len() == 0
or s:find( "[^:%x]" ) -- only colon and hex digits are legal chars
or s:find( "^:[^:]" ) -- can begin or end with :: but not with single :
or s:find( "[^:]:$" )
or s:find( ":::" )
then
return false
end
s, dcolon = s:gsub( "::", ":" )
if dcolon > 1 then return false end -- at most one ::
s = s:gsub( "^:?", ":" ) -- prepend : if needed, upper
s, groups = s:gsub( ":%x%x?%x?%x?", "" ) -- remove valid groups, and count them
return ( ( dcolon == 1 and groups < 8 ) or ( dcolon == 0 and groups == 8 ) )
and ( s:len() == 0 or ( dcolon == 1 and s == ":" ) ) -- might be one dangling : if original ended with ::
end
function _isIpV4( s )
local function legal( n ) return ( tonumber( n ) or 256 ) < 256 and not n:match("^0%d") end-- in lua 0 is true!
if type( s ) ~= "string" then return false end
local p1, p2, p3, p4 = s:match( "^(%d+)%.(%d+)%.(%d+)%.(%d+)$" )
return legal( p1 ) and legal( p2 ) and legal( p3 ) and legal( p4 )
end
function _isIp( s )
return _isIpV4( s ) and "4" or _isIpV6( s ) and "6"
end
local p = {}
function p.isIpV6(frame) return _isIpV6( frame.args[ 1 ] ) and "1" or "0" end
function p.isIpV4(frame) return _isIpV4( frame.args[ 1 ] ) and "1" or "0" end
function p.isIp(frame) return _isIp( frame.args[ 1 ] ) or "" end
return p