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-rw-r--r--libs/core/luasrc/ip.lua4
1 files changed, 3 insertions, 1 deletions
diff --git a/libs/core/luasrc/ip.lua b/libs/core/luasrc/ip.lua
index 2fe71297d..761a78110 100644
--- a/libs/core/luasrc/ip.lua
+++ b/libs/core/luasrc/ip.lua
@@ -382,8 +382,10 @@ function cidr.add( self, amount )
local add = ( #shorts > 0 ) and table.remove( shorts, #shorts ) or 0
if ( data[pos] + add ) > 0xFFFF then
data[pos] = ( data[pos] + add ) % 0xFFFF
- if pos > 2 then
+ if pos > 1 then
data[pos-1] = data[pos-1] + ( add - data[pos] )
+ else
+ return nil
end
else
data[pos] = data[pos] + add