From 069ac1115d4699f66996c04d6801d461ead1b189 Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jow@openwrt.org>
Date: Fri, 8 Aug 2008 12:38:21 +0000
Subject: [PATCH] * luci/libs: fixed contains() in luci.ip

---
 libs/core/luasrc/ip.lua | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/libs/core/luasrc/ip.lua b/libs/core/luasrc/ip.lua
index 68ac384dc..e6de08f1b 100644
--- a/libs/core/luasrc/ip.lua
+++ b/libs/core/luasrc/ip.lua
@@ -322,17 +322,20 @@ function cidr.prefix( self, mask )
 	return prefix
 end
 
-function cidr.network( self )
+function cidr.network( self, bits )
 	local data = { }
+	bits = bits or self[3]
 
-	for i = 1, math.floor( self[3] / 16 ) do
+	for i = 1, math.floor( bits / 16 ) do
 		table.insert( data, self[2][i] )
 	end
 
-	table.insert( data, bit.band( self[2][1+#data], __mask16(self[3]) ) )
+	if #data < #self[2] then
+		table.insert( data, bit.band( self[2][1+#data], __mask16(bits) ) )
 
-	for i = #data, #self[2] do
-		table.insert( data, 0 )
+		for i = #data, #self[2] do
+			table.insert( data, 0 )
+		end
 	end
 
 	return __bless({ self[1], data, __length(self[1]) })
@@ -350,10 +353,12 @@ function cidr.mask( self, bits )
 		table.insert( data, 0xFFFF )
 	end
 
-	table.insert( data, __mask16(bits) )
+	if #data < #self[2] then
+		table.insert( data, __mask16(bits) )
 
-	for i = #data + 1, #self[2] do
-		table.insert( data, 0 )
+		for i = #data + 1, #self[2] do
+			table.insert( data, 0 )
+		end
 	end
 
 	return __bless({ self[1], data, __length(self[1]) })
@@ -361,10 +366,9 @@ end
 
 function cidr.contains( self, addr )
 	assert( self[1] == addr[1], "Can't compare IPv4 and IPv6 addresses" )
-	local mask1 = self:prefix()
-	local mask2 = addr:prefix()
-	if mask1 <= mask2 then
-		return self:mask(addr:prefix()) == mask2
+
+	if self:prefix() <= addr:prefix() then
+		return self:network() == addr:network(self:prefix())
 	end
 
 	return false
-- 
2.11.0