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--[[
Alpine Wall main module
Copyright (C) 2012-2013 Kaarle Ritvanen
See LICENSE file for license details
]]--
module(..., package.seeall)
require 'lfs'
require 'stringy'
require 'awall.dependency'
require 'awall.ipset'
require 'awall.iptables'
require 'awall.model'
require 'awall.object'
require 'awall.optfrag'
require 'awall.policy'
require 'awall.util'
local optfrag = awall.optfrag
local events
local procorder
local achains
function loadmodules(path)
events = {}
achains = {}
local function readmetadata(mod)
local export = mod.export or {}
for name, target in pairs(export) do events[name] = target end
for name, opts in pairs(mod.achains or {}) do
assert(not achains[name])
achains[name] = opts
end
return awall.util.keys(export)
end
readmetadata(model)
local cdir = lfs.currentdir()
if path then lfs.chdir(path) end
local modules = {}
for modfile in lfs.dir((path or '/usr/share/lua/5.1')..'/awall/modules') do
if stringy.endswith(modfile, '.lua') then
table.insert(modules, 'awall.modules.'..string.sub(modfile, 1, -5))
end
end
table.sort(modules)
local imported = {}
for i, name in ipairs(modules) do
require(name)
awall.util.extend(imported, readmetadata(package.loaded[name]))
end
lfs.chdir(cdir)
events['%modules'] = {before=imported}
procorder = awall.dependency.order(events)
end
function loadclass(path)
assert(string.sub(path, 1, 1) ~= '%')
return events[path] and events[path].class
end
PolicySet = policy.PolicySet
Config = object.class()
function Config:init(policyconfig)
self.objects = policyconfig:expand()
self.iptables = iptables.IPTables.new()
local acfrags = {}
local function insertrules(trules)
for i, trule in ipairs(trules) do
local t = self.iptables.config[trule.family][trule.table][trule.chain]
local opts = (trule.opts and trule.opts..' ' or '')..'-j '..trule.target
local acfrag = {family=trule.family,
table=trule.table,
chain=trule.target}
acfrags[optfrag.location(acfrag)] = acfrag
if trule.position == 'prepend' then
table.insert(t, 1, opts)
else
table.insert(t, opts)
end
end
end
for i, path in ipairs(procorder) do
if string.sub(path, 1, 1) ~= '%' then
local objs = self.objects[path]
if objs then
for k, v in pairs(objs) do
objs[k] = events[path].class.morph(
v,
self,
path..' '..k..' ('..policyconfig.source[path][k]..')'
)
end
end
end
end
for i, event in ipairs(procorder) do
if string.sub(event, 1, 1) == '%' then
local r = events[event].rules
if r then
if type(r) == 'function' then r = r(self.objects) end
assert(type(r) == 'table')
insertrules(r)
end
elseif self.objects[event] then
for i, rule in ipairs(self.objects[event]) do
insertrules(rule:trules())
end
end
end
local ofrags = {}
for k, v in pairs(acfrags) do table.insert(ofrags, v) end
insertrules(optfrag.combinations(achains, ofrags))
self.ipset = ipset.IPSet.new(self.objects.ipset)
end
function Config:print()
self.ipset:print()
print()
self.iptables:print()
end
function Config:dump(dir)
self.ipset:dump(dir or '/etc/ipset.d')
self.iptables:dump(dir or '/etc/iptables')
end
function Config:test()
self.ipset:create()
self.iptables:test()
end
function Config:activate()
self:test()
self.iptables:activate()
end
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