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--[[
Copyright (c) 2012-2019 Kaarle Ritvanen
See LICENSE file for license details
--]]
--- @module aconf.model
local M = {}
local raise = require('aconf.error').raise
local Union = require('aconf.model.combination').Union
local fld = require('aconf.model.field')
local String = fld.String
local object = require('aconf.object')
local class = object.class
local super = object.super
local pth = require('aconf.path')
local update = require('aconf.util').update
local stringy = require('stringy')
local BaseIPAddress = class(String)
function BaseIPAddress:abs_mask_addr(context)
if self.mask_addr then
return pth.join(pth.parent(context.addr), self.mask_addr)
end
end
function BaseIPAddress:topology(context)
local res = super(self, BaseIPAddress):topology(context)
local maddr = self:abs_mask_addr(context)
if maddr then
table.insert(res, {path=context.path, addr=maddr, type=self.mask_type})
end
return res
end
function BaseIPAddress:invalid(context)
raise(context.path, 'Invalid IPv'..self.version..' address')
end
function BaseIPAddress:split(context, value)
local comps = stringy.split(value, '/')
if #comps == 1 then return value, self.length end
if #comps > 2 or not self.cidr then self:invalid(context) end
local mask = tonumber(comps[2])
if not mask or mask < 0 or mask > self.length then self:invalid(context) end
return comps[1], mask
end
function BaseIPAddress:decode(context, value)
local maddr = self:abs_mask_addr(context)
if value and maddr then
return value..'/'..(self:mask2cidr(context.txn:get(maddr)) or self.length)
end
return value
end
function BaseIPAddress:encode(context, value)
local maddr = self:abs_mask_addr(context)
if maddr then
local cidr
if value then value, cidr = self:split(context, value) end
context.txn:set(maddr, cidr and self:cidr2mask(cidr))
end
return value
end
--- IPv4 address field, inherits @{String}.
-- @fclass net.IPv4Address
-- @tparam boolean cidr if set to true, the field accepts a network
-- address in CIDR notation
-- @tparam string mask_addr if set, the network address is decomposed
-- into address and netmask in the back-end. This parameter specifies
-- the back-end address where the netmask is stored in dotted-quad
-- format.
M.IPv4Address = class(BaseIPAddress)
function M.IPv4Address:init(params)
super(self, M.IPv4Address):init(
update(params, {version=4, length=32, mask_type='string'})
)
end
function M.IPv4Address:validate(context, value)
super(self, M.IPv4Address):validate(context, value)
local address = self:split(context, value)
local function test(...)
if #{...} ~= 4 then return true end
for _, octet in ipairs{...} do
if tonumber(octet) > 255 then return true end
end
end
if test(address:match('^(%d+)%.(%d+)%.(%d+)%.(%d+)$')) then
self:invalid(context)
end
end
function M.IPv4Address:mask2cidr(mask)
local acc = 0
for i, comp in ipairs(stringy.split(mask, '.')) do
acc = acc + math.floor(256 ^ (4 - i)) * tonumber(comp)
end
local res = 32
while acc % 2 == 0 do
res = res - 1
assert(res > -1)
acc = acc / 2
end
return res
end
function M.IPv4Address:cidr2mask(cidr)
local acc = (math.floor(2 ^ cidr) - 1) * math.floor(2 ^ (32 - cidr))
local comps = {}
for i = 4,1,-1 do
comps[i] = acc % 256
acc = math.floor(acc / 256)
end
return table.concat(comps, '.')
end
--- IPv6 address field, inherits @{String}.
-- @fclass net.IPv6Address
-- @tparam boolean cidr if set to true, the field accepts a network
-- address
-- @tparam string mask_addr if set, the network address is decomposed
-- into address and netmask parts in the back-end. This parameter
-- specifies the back-end address where the netmask length is stored.
M.IPv6Address = class(BaseIPAddress)
function M.IPv6Address:init(params)
super(self, M.IPv6Address):init(
update(params, {version=6, length=128, mask_type='number'})
)
end
function M.IPv6Address:validate(context, value)
super(self, M.IPv6Address):validate(context, value)
local address = self:split(context, value)
local function invalid() self:invalid(context) end
if address == '' then invalid() end
local comps = stringy.split(address, ':')
if #comps < 3 then invalid() end
local function collapse(i, ofs)
if comps[i] > '' then return end
if comps[i + ofs] > '' then invalid() end
table.remove(comps, i)
end
collapse(1, 1)
collapse(#comps, -1)
if #comps > 8 then invalid() end
local short = false
for _, comp in ipairs(comps) do
if comp == '' then
if short then invalid() end
short = true
elseif not comp:match('^%x%x?%x?%x?$') then invalid() end
end
if (
short and #comps == 3 and comps[2] == ''
) or (not short and #comps < 8) then
invalid()
end
end
function M.IPv6Address:mask2cidr(mask) return mask end
function M.IPv6Address:cidr2mask(cidr) return cidr end
--- IP address field, inherits @{String}. Accepts both IPv4 and IPv6
-- address values.
-- @fclass net.IPAddress
M.IPAddress = class(Union)
function M.IPAddress:init(params)
super(self, M.IPAddress):init(
update(
params,
{types={M.IPv4Address, M.IPv6Address}, error='Invalid IP address'}
)
)
end
--- TCP or UDP port field, inherits @{Integer}. The value can be
-- between 0 and 65535.
-- @fclass net.Port
M.Port = class(fld.Integer)
function M.Port:validate(context, value)
super(self, M.Port):validate(context, value)
if value < 0 or value > 65535 then raise(context.path, 'Invalid port') end
end
local domain_pattern = '[A-Za-z%d%.%-]+%.[A-Za-z][A-Za-z]+'
--- domain name field, inherits @{String}.
-- @fclass net.DomainName
M.DomainName = class(String)
function M.DomainName:init(params)
super(self, M.DomainName):init(update(params, {pattern=domain_pattern}))
end
M.EmailAddress = class(String)
function M.EmailAddress:init(params)
super(self, M.EmailAddress):init(
update(params, {pattern='[A-Za-z%d%.%+%-]+@'..domain_pattern})
)
end
return M
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