Added support to all and port range for acl

scripts/lua/modules/validation_utils.lua

@@ -0,0 +1,50 @@
+--
+-- (C) 2021 - ntop.org
+--
+local dirs = ntop.getDirs()
+package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
+
+-- #################################################################
+
+local validation_utils = {}
+
+-- #################################################################
+
+local function validateNumber(p)
+    -- integer number validation
+    local num = tonumber(p)
+
+    if (num == nil) then
+        return false
+    end
+
+    if math.floor(num) == num then
+        return true
+    else
+        -- this is a float number
+        return false
+    end
+end
+
+-- #################################################################
+
+function validation_utils.validatePortRange(p)
+    local v = string.split(p, "%-") or {p, p}
+
+    if #v ~= 2 then
+        return false
+    end
+
+    if not validateNumber(v[1]) or not validateNumber(v[2]) then
+        return false
+    end
+
+    local p0 = tonumber(v[1]) or 0
+    local p1 = tonumber(v[2]) or 0
+
+    return (((p0 >= 1) and (p0 <= 65535)) and ((p1 >= 1) and (p1 <= 65535) and (p1 >= p0)))
+end
+
+-- #################################################################
+
+return validation_utils