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module(..., package.seeall)
-- Load libraries
require("procps")
require("getopts")
require("fs")
require("format")
require("processinfo")
require("daemoncontrol")
require("validator")
-- Set variables
local configfiles = {}
local packagename = "tinydns"
local processname = "tinydns"
local configfile = "/etc/conf.d/" .. processname
local configdir = "/etc/"..processname
local descr = {
prefix={
['.']="Name server for your domain (NS + A + SOA)",
['&']="Delegate subdomain (NS + A)",
['=']="Host (A + PTR)",
['+']="Alias (A, no PTR)",
['@']="Mail exchanger (MX)",
["'"]="Text record (TXT)",
['^']="Reverse record (PTR)",
['C']="Canonical name (CNAME)",
['Z']="SOA record (SOA)",
[':']="Generic record",
['%']="Client location",
},
fieldlabels={
['.']={"Domain", "IP address", "Name server", "Time to live", "Timestamp", "Location", },
['&']={"Domain", "IP address", "Name server", "Time to live", "Timestamp", "Location", },
['=']={"Host", "IP address", "Time to live", "Timestamp", "Location", },
['+']={"Alias", "IP address", "Time to live", "Timestamp", "Location", },
['@']={"Domain", "IP address", "Mail exchanger", "Distance", "Time to live", "Timestamp", "Location", },
['\'']={"Domain", "Text Record", "Time to live", "Timestamp", "Location", },
['^']={"PTR", "Domain name", "Time to live", "Timestamp", "Location", },
['C']={"Domain", "Canonical name", "Time to live", "Timestamp", "Location", },
['Z']={"Domain", "Primary name server", "Contact address", "Serial number", "Refresh time", "Retry time", "Expire time", "Minimum time", "Time to live", "Timestamp", "Location",},
[':']={"Domain", "Record type", "Record data", "Time to live", "Timestamp", "Location", },
['%']={"Location", "IP prefix", },
},
}
-- ################################################################################
-- LOCAL FUNCTIONS
-- Return a table with the config-content of a file
-- Commented/Blank lines are ignored
local function get_value_from_file(file)
local output = {}
local filecontent = fs.read_file_as_array(file)
for i=1,table.maxn(filecontent) do
local l = filecontent[i]
if not (string.find ( l, "^[;#].*" )) and not (string.find (l, "^%s*$")) then
table.insert(output, string.match(l,"(.-)%s*$"))
end
end
if (#output > 0) then
return true, output
else
return false, output
end
end
-- Function to recursively inserts all filenames in a dir into an array
local function recursedir(path, filearray)
local k,v
for k,v in pairs(posix.dir(path) or {}) do
-- Ignore files that begins with a '.'
if not string.match(v, "^%.") then
local f = path .. "/" .. v
-- If subfolder exists, list files in this subfolder
if (posix.stat(f).type == "directory") then
recursedir(f, filearray)
else
table.insert(filearray, f)
end
end
end
end
-- Functin to split items into a table
local function split_config_items(orgitem)
local delimiter = ":"
local output = {}
output = format.string_to_table(string.sub(orgitem,2),delimiter)
output.type = string.sub(orgitem,1,1)
output.label = descr['prefix'][output.type] or "unknown"
return output
end
-- Feed the configfiles table with list of all availage configfiles
local function searchforconfigfiles()
local cnffile = {}
recursedir(configdir, cnffile)
for k,v in pairs(cnffile) do
local configcontent = get_value_from_file(v)
if (configcontent) then
table.insert(configfiles, v)
end
end
end
searchforconfigfiles()
local function validfilename(path)
for k,v in pairs(getfilelist().value) do
if (v == path) then
return true
end
end
return false, "Not a valid filename!"
end
-- ################################################################################
-- PUBLIC FUNCTIONS
function startstop_service ( self, action )
-- action is validated in daemoncontrol
local cmdresult,cmdmessage,cmderror,cmdaction = daemoncontrol.daemoncontrol(processname, action)
return cfe({ type="boolean", value=cmdresult, descr=cmdmessage, errtxt=cmderror, label="Start/Stop result" })
end
-- Present some general status
function getstatus()
local status = {}
local value, errtxt = processinfo.package_version(packagename)
status.version = cfe({
label="Program version",
value=value,
errtxt=errtxt,
})
status.status = cfe({
label="Program status",
value=procps.pidof(processname),
})
if (#status.status.value > 0) then
status.status.value = "Enabled"
else
status.status.value = "Disabled"
end
status.configdir = cfe({
label="Config directory",
value=configdir,
})
status.configfiles = cfe({
type="list",
label="Config files",
value=configfiles,
})
local autostart_sequense, autostart_errtxt = processinfo.process_botsequence(processname)
status.autostart = cfe({
label="Autostart sequence",
value=autostart_sequense,
errtxt=autostart_errtxt,
})
local config = getconfig()
status.listen = config.value.listen
return cfe({ type="group", value=status, label="DNS Status" })
end
function getconfig()
local config = {}
local listenaddr = getopts.getoptsfromfile(configfile,"","IP") or ""
config.listen = cfe({
label="IP address to listen on",
value=listenaddr,
})
local test, errtxt = validator.is_ipv4(config.listen.value)
if not test then
config.listen.errtxt = errtxt
end
return cfe({ type="group", value=config, label="TinyDNS Configuration" })
end
function setconfig(conf)
local test, errtxt = validator.is_ipv4(conf.value.listen.value)
if not test then
conf.value.listen.errtxt = errtxt
conf.errtxt = "Failed to set configuration"
else
getopts.setoptsinfile(configfile,"","IP",conf.value.listen.value)
end
return conf
end
-- If you enter 'filter_type' (this should be one of the options found in local function check_signs() ) then
-- the output will be filtered to only contain this type of data.
function getconfigobjects(self, filter_type)
local configobjects = {}
--Loop through all available configfiles
for i,filename in pairs(configfiles) do
local filecontent, fileresult
fileresult, filecontent = get_value_from_file(filename)
for j,configline in pairs(filecontent) do
local domaindetails = {}
local filecontent_table = split_config_items(configline)
filecontent_table.configline = configline
-- Use only configs that has a valid prefix
-- If function is called with some filter options... then show only the filtered values
if ( not (filter_type) or ((filter_type) and (filter_type == filecontent_table.type)) )
and (filecontent_table.label)
then
local entry = {}
for i,value in ipairs(filecontent_table) do
entry[i] = value
end
-- we're gonna add a reverse domain name to make it easier to sort
local domain = {}
for mt in string.gmatch(entry[1], "([^.]+)") do
table.insert(domain, mt)
end
local reversedomain = {}
for i=#domain,1,-1 do
table.insert(reversedomain, domain[i])
end
entry.sort = table.concat(reversedomain, ".")
-- add it to the table
if not configobjects[filecontent_table.type] then
configobjects[filecontent_table.type] = {label=filecontent_table.label, fieldlabels=descr.fieldlabels[filecontent_table.type]}
end
table.insert(configobjects[filecontent_table.type], entry)
end
end
end
-- Sort each of the tables by domain name (entry 1)
for type,entries in pairs(configobjects) do
table.sort(entries, function(a,b)
if a == b then
return false;
elseif a.sort ~= b.sort then
return a.sort < b.sort
end
for i in ipairs(a) do
if a[i] ~= b[i] then
return a[i] < b[i]
end
end
a.errtxt = "Duplicate entry"
b.errtxt = "Duplicate entry"
return false
end)
for i,entry in ipairs(entries) do
entry.sort = nil
end
end
return configobjects
end
function getfilelist ()
local listed_files = {}
recursedir(configdir, listed_files)
return cfe({ type="list", value=listed_files, label="List of config files" })
end
function get_filedetails(path)
local file = {}
local filedetails = {}
local filenameerrtxt
if (path) and (fs.is_file(path)) then
filedetails = fs.stat(path)
else
filenameerrtxt="Config file '".. tostring(path) .. "' is missing!"
end
file["filename"] = cfe({
label="File name",
value=path,
errtxt=filenameerrtxt
})
file["filesize"] = cfe({
label="File size",
value=filedetails.size or "0",
})
file["mtime"] = cfe({
label="File date",
value=filedetails.mtime or "---",
})
file["filecontent"] = cfe({
type="longtext",
label="File content",
value=fs.read_file(path),
})
return cfe({ type="group", value=file, label="Config file details" })
end
function updatefilecontent (path, modifications)
local success = false
local errtxt
if not (fs.is_file(path)) then
errtxt = "Not a filename"
elseif (validfilename(path)) then
modifications = string.gsub(format.dostounix(modifications), "\n*$", "")
fs.write_file(path, modifications)
success = true
else
errtxt = "Not a valid filename!"
end
return cfe({ type="boolean", value=success, label="Update file result", errtxt=errtxt })
end
function getnewconfigfile()
local options = {}
options.filename = cfe({ value=configdir.."/", label="File Name" })
return cfe({ type="group", value=options, label="New config file" })
end
function createconfigfile(configfile)
configfile.errtxt = "Failed to create file"
local path = configfile.value.filename.value
local validfilepath, filepatherror = validator.is_valid_filename(path,configdir)
if (validfilepath) then
if (fs.is_file(path)) then
configfile.value.filename.errtxt = "File already exists"
else
local file = io.open(path, "w")
file:close()
configfile.errtxt = nil
end
else
configfile.value.filename.errtxt = filepatherror
end
return configfile
end
function remove_file(path)
local success = false
local errtxt
if not (fs.is_file(path)) then
errtxt = "File doesn't exist!"
elseif (validfilename(path)) then
local cmd, errors = io.popen( "/bin/rm " .. path, r )
local cmdoutput = cmd:read("*a")
cmd:close()
success = true
else
errtxt = "Not a valid filename!"
end
return cfe({ type="boolean", value=success, label="Delete config file result", errtxt=errtxt })
end
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