75 lines
1.6 KiB
Lua
Executable File
75 lines
1.6 KiB
Lua
Executable File
#!/usr/bin/lua
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local RESOLV_CONF = '/var/gluon/wan-dnsmasq/resolv.conf'
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local stat = require 'posix.sys.stat'
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local ubus = require('ubus').connect()
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local uci = require('simple-uci').cursor()
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local util = require 'gluon.util'
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local new_servers = ''
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local function append_server(server)
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new_servers = new_servers .. 'nameserver ' .. server .. '\n'
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end
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local function handled_interfaces()
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local interfaces = {}
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for _, path in ipairs(util.glob('/lib/gluon/wan-dnsmasq/interface.d/*')) do
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for interface in io.lines(path) do
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table.insert(interfaces, interface)
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end
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end
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return interfaces
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end
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local function handle_interface(status)
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local ifname = status.device
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local servers = status.inactive['dns-server']
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for _, server in ipairs(servers) do
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if server:match('^fe80:') then
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append_server(server .. '%' .. ifname)
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else
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append_server(server)
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end
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end
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end
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local function append_interface_servers(iface)
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handle_interface(ubus:call('network.interface.' .. iface, 'status', {}))
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end
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local static = uci:get_first('gluon-wan-dnsmasq', 'static', 'server')
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if type(static) == 'table' and #static > 0 then
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for _, server in ipairs(static) do
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append_server(server)
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end
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else
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for _, interface in ipairs(handled_interfaces()) do
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pcall(append_interface_servers, interface)
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end
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end
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local old_servers = util.readfile(RESOLV_CONF)
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if new_servers ~= old_servers then
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stat.mkdir('/var/gluon')
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stat.mkdir('/var/gluon/wan-dnsmasq')
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local f = io.open(RESOLV_CONF .. '.tmp', 'w')
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f:write(new_servers)
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f:close()
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os.rename(RESOLV_CONF .. '.tmp', RESOLV_CONF)
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end
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