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Make packet.in_cksum work for data with an odd length.

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david 2009-10-29 00:15:04 +00:00
parent 2b8b5e2f6a
commit 9817ee470d
1 changed files with 3 additions and 0 deletions
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3
nselib/packet.lua
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@ -82,6 +82,9 @@ function in_cksum(b)
x = x:sub(3)
sum = sum + u16(c, 0)
end
if x:len() == 1 then
sum = sum + u8(x, 0) * 256
end
sum = bit.rshift(sum, 16) + bit.band(sum, 0xffff)
sum = sum + bit.rshift(sum, 16)