applications/luci-app-ddns/luasrc/controller/ddns.lua

   1 -- Copyright 2008 Steven Barth <steven@midlink.org>
   2 -- Copyright 2008 Jo-Philipp Wich <jow@openwrt.org>
   3 -- Copyright 2013 Manuel Munz <freifunk at somakoma dot de>
   4 -- Copyright 2014-2016 Christian Schoenebeck <christian dot schoenebeck at gmail dot com>
   5 -- Licensed to the public under the Apache License 2.0.
   6
   7 module("luci.controller.ddns", package.seeall)
   8
   9 local NX   = require "nixio"
  10 local NXFS = require "nixio.fs"
  11 local DISP = require "luci.dispatcher"
  12 local HTTP = require "luci.http"
  13 local I18N = require "luci.i18n"                -- not globally avalible here
  14 local IPKG = require "luci.model.ipkg"
  15 local SYS  = require "luci.sys"
  16 local UCI  = require "luci.model.uci"
  17 local UTIL = require "luci.util"
  18 local DDNS = require "luci.tools.ddns"          -- ddns multiused functions
  19
  20 local srv_name    = "ddns-scripts"
  21 local srv_ver_min = "2.7.2"                     -- minimum version of service required
  22 local srv_ver_cmd = [[/usr/lib/ddns/dynamic_dns_updater.sh --version | awk {'print $2'}]]
  23 local app_name    = "luci-app-ddns"
  24 local app_title   = "Dynamic DNS"
  25 local app_version = "2.4.6-1"
  26
  27 function index()
  28         local nxfs      = require "nixio.fs"            -- global definitions not available
  29         local sys       = require "luci.sys"            -- in function index()
  30         local ddns      = require "luci.tools.ddns"     -- ddns multiused functions
  31         local muci      = require "luci.model.uci"
  32
  33         -- no config create an empty one
  34         if not nxfs.access("/etc/config/ddns") then
  35                 nxfs.writefile("/etc/config/ddns", "")
  36         end
  37
  38         -- preset new option "lookup_host" if not already defined
  39         local uci = muci.cursor()
  40         local commit = false
  41         uci:foreach("ddns", "service", function (s)
  42                 if not s["lookup_host"] and s["domain"] then
  43                         uci:set("ddns", s[".name"], "lookup_host", s["domain"])
  44                         commit = true
  45                 end
  46         end)
  47         if commit then uci:commit("ddns") end
  48         uci:unload("ddns")
  49
  50         entry( {"admin", "services", "ddns"}, cbi("ddns/overview"), _("Dynamic DNS"), 59)
  51         entry( {"admin", "services", "ddns", "detail"}, cbi("ddns/detail"), nil ).leaf = true
  52         entry( {"admin", "services", "ddns", "hints"}, cbi("ddns/hints",
  53                 {hideapplybtn=true, hidesavebtn=true, hideresetbtn=true}), nil ).leaf = true
  54         entry( {"admin", "services", "ddns", "global"}, cbi("ddns/global"), nil ).leaf = true
  55         entry( {"admin", "services", "ddns", "logview"}, call("logread") ).leaf = true
  56         entry( {"admin", "services", "ddns", "startstop"}, post("startstop") ).leaf = true
  57         entry( {"admin", "services", "ddns", "status"}, call("status") ).leaf = true
  58 end
  59
  60 -- Application specific information functions
  61 function app_description()
  62         return  I18N.translate("Dynamic DNS allows that your router can be reached with " ..
  63                         "a fixed hostname while having a dynamically changing IP address.")
  64                 .. [[<br />]]
  65                 .. I18N.translate("OpenWrt Wiki") .. ": "
  66                 .. [[<a href="http://wiki.openwrt.org/doc/howto/ddns.client" target="_blank">]]
  67                 .. I18N.translate("DDNS Client Documentation") .. [[</a>]]
  68                 .. " --- "
  69                 .. [[<a href="http://wiki.openwrt.org/doc/uci/ddns" target="_blank">]]
  70                 .. I18N.translate("DDNS Client Configuration") .. [[</a>]]
  71 end
  72 function app_title_back()
  73         return  [[<a href="]]
  74                 .. DISP.build_url("admin", "services", "ddns")
  75                 .. [[">]]
  76                 .. I18N.translate(app_title)
  77                 .. [[</a>]]
  78 end
  79
  80 -- Standardized application/service functions
  81 function app_title_main()
  82         return  [[<a href="javascript:alert(']]
  83                         .. I18N.translate("Version Information")
  84                         .. [[\n\n]] .. app_name
  85                         .. [[\n\t]] .. I18N.translate("Version") .. [[:\t]] .. app_version
  86                         .. [[\n\n]] .. srv_name .. [[ ]] .. I18N.translate("required") .. [[:]]
  87                         .. [[\n\t]] .. I18N.translate("Version") .. [[:\t]]
  88                                 .. srv_ver_min .. [[ ]] .. I18N.translate("or higher")
  89                         .. [[\n\n]] .. srv_name .. [[ ]] .. I18N.translate("installed") .. [[:]]
  90                         .. [[\n\t]] .. I18N.translate("Version") .. [[:\t]]
  91                                 .. (service_version() or I18N.translate("NOT installed"))
  92                         .. [[\n\n]]
  93                 .. [[')">]]
  94                 .. I18N.translate(app_title)
  95                 .. [[</a>]]
  96 end
  97 function service_version()
  98         local ver = nil
  99         IPKG.list_installed(srv_name, function(n, v, d)
 100                         if v and (#v > 0) then ver = v end
 101                 end
 102         )
 103         if not ver or (#ver == 0) then
 104                 ver = UTIL.exec(srv_ver_cmd)
 105                 if #ver == 0 then ver = nil end
 106         end
 107         return  ver
 108 end
 109 function service_ok()
 110         return  IPKG.compare_versions((service_version() or "0"), ">=", srv_ver_min)
 111 end
 112
 113 -- internal function to read all sections status and return data array
 114 local function _get_status()
 115         local uci        = UCI.cursor()
 116         local service    = SYS.init.enabled("ddns") and 1 or 0
 117         local url_start  = DISP.build_url("admin", "system", "startup")
 118         local data       = {}   -- Array to transfer data to javascript
 119
 120         data[#data+1]   = {
 121                 enabled    = service,           -- service enabled
 122                 url_up     = url_start,         -- link to enable DDS (System-Startup)
 123         }
 124
 125         uci:foreach("ddns", "service", function (s)
 126
 127                 -- Get section we are looking at
 128                 -- and enabled state
 129                 local section   = s[".name"]
 130                 local enabled   = tonumber(s["enabled"]) or 0
 131                 local datelast  = "_empty_"     -- formatted date of last update
 132                 local datenext  = "_empty_"     -- formatted date of next update
 133
 134                 -- get force seconds
 135                 local force_seconds = DDNS.calc_seconds(
 136                                 tonumber(s["force_interval"]) or 72 ,
 137                                 s["force_unit"] or "hours" )
 138                 -- get/validate pid and last update
 139                 local pid      = DDNS.get_pid(section)
 140                 local uptime   = SYS.uptime()
 141                 local lasttime = DDNS.get_lastupd(section)
 142                 if lasttime > uptime then       -- /var might not be linked to /tmp
 143                         lasttime = 0            -- and/or not cleared on reboot
 144                 end
 145
 146                 -- no last update happen
 147                 if lasttime == 0 then
 148                         datelast = "_never_"
 149
 150                 -- we read last update
 151                 else
 152                         -- calc last update
 153                         --             sys.epoch - sys uptime   + lastupdate(uptime)
 154                         local epoch = os.time() - uptime + lasttime
 155                         -- use linux date to convert epoch
 156                         datelast = DDNS.epoch2date(epoch)
 157                         -- calc and fill next update
 158                         datenext = DDNS.epoch2date(epoch + force_seconds)
 159                 end
 160
 161                 -- process running but update needs to happen
 162                 -- problems if force_seconds > uptime
 163                 force_seconds = (force_seconds > uptime) and uptime or force_seconds
 164                 if pid > 0 and ( lasttime + force_seconds - uptime ) <= 0 then
 165                         datenext = "_verify_"
 166
 167                 -- run once
 168                 elseif force_seconds == 0 then
 169                         datenext = "_runonce_"
 170
 171                 -- no process running and NOT enabled
 172                 elseif pid == 0 and enabled == 0 then
 173                         datenext  = "_disabled_"
 174
 175                 -- no process running and enabled
 176                 elseif pid == 0 and enabled ~= 0 then
 177                         datenext = "_stopped_"
 178                 end
 179
 180                 -- get/set monitored interface and IP version
 181                 local iface     = s["interface"] or "_nonet_"
 182                 local use_ipv6  = tonumber(s["use_ipv6"]) or 0
 183                 if iface ~= "_nonet_" then
 184                         local ipv = (use_ipv6 == 1) and "IPv6" or "IPv4"
 185                         iface = ipv .. " / " .. iface
 186                 end
 187
 188                 -- try to get registered IP
 189                 local lookup_host = s["lookup_host"] or "_nolookup_"
 190                 local dnsserver = s["dns_server"] or ""
 191                 local force_ipversion = tonumber(s["force_ipversion"] or 0)
 192                 local force_dnstcp = tonumber(s["force_dnstcp"] or 0)
 193                 local is_glue = tonumber(s["is_glue"] or 0)
 194                 local command = [[/usr/lib/ddns/dynamic_dns_lucihelper.sh]]
 195                 command = command .. [[ get_registered_ip ]] .. lookup_host .. [[ ]] .. use_ipv6 ..
 196                         [[ ]] .. force_ipversion .. [[ ]] .. force_dnstcp ..
 197                         [[ ]] .. is_glue .. [[ ]] .. dnsserver
 198                 local reg_ip = SYS.exec(command)
 199                 if reg_ip == "" then
 200                         reg_ip = "_nodata_"
 201                 end
 202
 203                 -- fill transfer array
 204                 data[#data+1]   = {
 205                         section  = section,
 206                         enabled  = enabled,
 207                         iface    = iface,
 208                         lookup   = lookup_host,
 209                         reg_ip   = reg_ip,
 210                         pid      = pid,
 211                         datelast = datelast,
 212                         datenext = datenext
 213                 }
 214         end)
 215
 216         uci:unload("ddns")
 217         return data
 218 end
 219
 220 -- called by XHR.get from detail_logview.htm
 221 function logread(section)
 222         -- read application settings
 223         local uci       = UCI.cursor()
 224         local log_dir   = uci:get("ddns", "global", "log_dir") or "/var/log/ddns"
 225         local lfile     = log_dir .. "/" .. section .. ".log"
 226         local ldata     = NXFS.readfile(lfile)
 227
 228         if not ldata or #ldata == 0 then
 229                 ldata="_nodata_"
 230         end
 231         uci:unload("ddns")
 232         HTTP.write(ldata)
 233 end
 234
 235 -- called by XHR.get from overview_status.htm
 236 function startstop(section, enabled)
 237         local uci  = UCI.cursor()
 238         local pid  = DDNS.get_pid(section)
 239         local data = {}         -- Array to transfer data to javascript
 240
 241         -- if process running we want to stop and return
 242         if pid > 0 then
 243                 local tmp = NX.kill(pid, 15)    -- terminate
 244                 NX.nanosleep(2) -- 2 second "show time"
 245                 -- status changed so return full status
 246                 data = _get_status()
 247                 HTTP.prepare_content("application/json")
 248                 HTTP.write_json(data)
 249                 return
 250         end
 251
 252         -- read uncommitted changes
 253         -- we don't save and commit data from other section or other options
 254         -- only enabled will be done
 255         local exec        = true
 256         local changed     = uci:changes("ddns")
 257         for k_config, v_section in pairs(changed) do
 258                 -- security check because uci.changes only gets our config
 259                 if k_config ~= "ddns" then
 260                         exec = false
 261                         break
 262                 end
 263                 for k_section, v_option in pairs(v_section) do
 264                         -- check if only section of button was changed
 265                         if k_section ~= section then
 266                                 exec = false
 267                                 break
 268                         end
 269                         for k_option, v_value in pairs(v_option) do
 270                                 -- check if only enabled was changed
 271                                 if k_option ~= "enabled" then
 272                                         exec = false
 273                                         break
 274                                 end
 275                         end
 276                 end
 277         end
 278
 279         -- we can not execute because other
 280         -- uncommitted changes pending, so exit here
 281         if not exec then
 282                 HTTP.write("_uncommitted_")
 283                 return
 284         end
 285
 286         -- save enable state
 287         uci:set("ddns", section, "enabled", ( (enabled == "true") and "1" or "0") )
 288         uci:save("ddns")
 289         uci:commit("ddns")
 290         uci:unload("ddns")
 291
 292         -- start dynamic_dns_updater.sh script
 293         os.execute ([[/usr/lib/ddns/dynamic_dns_updater.sh %s 0 > /dev/null 2>&1 &]] % section)
 294         NX.nanosleep(3) -- 3 seconds "show time"
 295
 296         -- status changed so return full status
 297         data = _get_status()
 298         HTTP.prepare_content("application/json")
 299         HTTP.write_json(data)
 300 end
 301
 302 -- called by XHR.poll from overview_status.htm
 303 function status()
 304         local data = _get_status()
 305         HTTP.prepare_content("application/json")
 306         HTTP.write_json(data)
 307 end
 308