From a567f68b811e0e9199f513eda7b3a1b35f47658f Mon Sep 17 00:00:00 2001
From: Ted Trask <ttrask01@yahoo.com>
Date: Thu, 26 Jun 2008 19:16:25 +0000
Subject: Rewrite of DNScache.

git-svn-id: svn://svn.alpinelinux.org/acf/core/trunk@1262 ab2d0c66-481e-0410-8bed-d214d4d58bed
---
 lib/validator.lua | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 'lib/validator.lua')

diff --git a/lib/validator.lua b/lib/validator.lua
index d57ca5f..afea72c 100755
--- a/lib/validator.lua
+++ b/lib/validator.lua
@@ -108,6 +108,37 @@ function is_ipv4(ipv4)
 	return true, validator.msg.err.Success[lang.Current]
 end
 
+--
+-- This function validates a partial ipv4 address.
+-- On success it returns 1 otherwise a negative value
+--
+function is_partial_ipv4(ipv4)
+	local retval = false;
+	local nums = {};
+	
+	-- Check to see if any invalid characters
+	if not ipv4 or not ipv4:match("^[%d%.]+$") then
+		return false, validator.msg.err.InvalidFormat[lang.Current]
+	end
+
+	-- NC: Split the string into an array. separate with '.' (dots)
+	-- %d+	one or more digits
+	for num in ipv4:gmatch("%d+") do
+		nums[#nums+1] = num
+		-- too big?
+		if tonumber(num) > 255 then
+			return false, validator.msg.err.InvalidFormat[lang.Current]
+		end
+	end
+
+	-- too many numbers
+	if #nums > 4 then
+		return false, validator.msg.err.InvalidFormat[lang.Current]
+	end
+
+	return true, validator.msg.err.Success[lang.Current]
+end
+
 function is_mac(mac)
 
 	local tmpmac = string.upper(mac)
-- 
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