libs/uvl/luasrc/uvl/datatypes.lua

   1 --[[
   2
   3 UCI Validation Layer - Datatype Tests
   4 (c) 2008 Jo-Philipp Wich <xm@leipzig.freifunk.net>
   5 (c) 2008 Steven Barth <steven@midlink.org>
   6
   7 Licensed under the Apache License, Version 2.0 (the "License");
   8 you may not use this file except in compliance with the License.
   9 You may obtain a copy of the License at
  10
  11         http://www.apache.org/licenses/LICENSE-2.0
  12
  13 $Id$
  14
  15 ]]--
  16
  17 local fs = require "luci.fs"
  18 local ip = require "luci.ip"
  19 local math = require "math"
  20 local util = require "luci.util"
  21
  22 local tonumber = tonumber
  23
  24 module "luci.uvl.datatypes"
  25
  26
  27 function boolean( val )
  28         if val == "1" or val == "yes" or val == "on" or val == "true" then
  29                 return true
  30         elseif val == "0" or val == "no" or val == "off" or val == "false" then
  31                 return true
  32         end
  33
  34         return false
  35 end
  36
  37 function uint( val )
  38         local n = tonumber(val)
  39         if n ~= nil and math.floor(n) == n and n >= 0 then
  40                 return true
  41         end
  42
  43         return false
  44 end
  45
  46 function integer( val )
  47         local n = tonumber(val)
  48         if n ~= nil and math.floor(n) == n then
  49                 return true
  50         end
  51
  52         return false
  53 end
  54
  55 function float( val )
  56         return ( tonumber(val) ~= nil )
  57 end
  58
  59 function ipaddr( val )
  60         return ip4addr(val) or ip6addr(val)
  61 end
  62
  63 function ip4addr( val )
  64         if val then
  65                 return ip.IPv4(val) and true or false
  66         end
  67
  68         return false
  69 end
  70
  71 function ip4prefix( val )
  72         val = tonumber(val)
  73         return ( val and val >= 0 and val <= 32 )
  74 end
  75
  76 function ip6addr( val )
  77         if val then
  78                 return ip.IPv6(val) and true or false
  79         end
  80
  81         return false
  82 end
  83
  84 function ip6prefix( val )
  85         val = tonumber(val)
  86         return ( val and val >= 0 and val <= 128 )
  87 end
  88
  89 function port( val )
  90         val = tonumber(val)
  91         return ( val and val >= 1 and val <= 65535 )
  92 end
  93
  94 function portrange( val )
  95         local p1, p2 = val:match("^(%d+)%-(%d+)$")
  96         if p1 and p2 and port(p1) and port(p2) then
  97                 return true
  98         else
  99                 return port(val)
 100         end
 101 end
 102
 103 function macaddr( val )
 104         if val and val:match(
 105                 "^[a-fA-F0-9]+:[a-fA-F0-9]+:[a-fA-F0-9]+:" ..
 106                  "[a-fA-F0-9]+:[a-fA-F0-9]+:[a-fA-F0-9]+$"
 107         ) then
 108                 local parts = util.split( val, ":" )
 109
 110                 for i = 1,6 do
 111                         parts[i] = tonumber( parts[i], 16 )
 112                         if parts[i] < 0 or parts[i] > 255 then
 113                                 return false
 114                         end
 115                 end
 116
 117                 return true
 118         end
 119
 120         return false
 121 end
 122
 123 function hostname( val )
 124         if val and val:match("[a-zA-Z0-9_][a-zA-Z0-9_%-%.]*") then
 125                 return true     -- XXX: ToDo: need better solution
 126         end
 127
 128         return false
 129 end
 130
 131 function host( val )
 132         return hostname(val) or ipaddr(val)
 133 end
 134
 135 function string( val )
 136         return true             -- Everything qualifies as valid string
 137 end
 138
 139 function directory( val, seen )
 140         local s = fs.stat( val )
 141         seen = seen or { }
 142
 143         if s and not seen[s.ino] then
 144                 seen[s.ino] = true
 145                 if s.type == "directory" then
 146                         return true
 147                 elseif s.type == "link" then
 148                         return directory( fs.readlink(val), seen )
 149                 end
 150         end
 151
 152         return false
 153 end
 154
 155 function file( val, seen )
 156         local s = fs.stat( val )
 157         seen = seen or { }
 158
 159         if s and not seen[s.ino] then
 160                 seen[s.ino] = true
 161                 if s.type == "regular" then
 162                         return true
 163                 elseif s.type == "link" then
 164                         return file( fs.readlink(val), seen )
 165                 end
 166         end
 167
 168         return false
 169 end