mirror of
https://github.com/jart/cosmopolitan.git
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66 lines
1.8 KiB
Lua
66 lines
1.8 KiB
Lua
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-- fingerprinting example
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Write[[<!doctype html>
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<title>redbean binary trees</title>
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<style>
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body { padding: 1em; }
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h1 a { color: inherit; text-decoration: none; }
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h1 img { border: none; vertical-align: middle; }
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input { margin: 1em; padding: .5em; }
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p { word-break: break-word; max-width: 650px; }
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dt { font-family: monospace; }
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dd { margin-top: 1em; margin-bottom: 1em; }
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.hdr { text-indent: -1em; padding-left: 1em; }
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</style>
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<h1>
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<a href="/"><img src="/redbean.png"></a>
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<a href="finger.lua">redbean finger demo</a>
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</h1>
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]]
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Write[[
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<h2>Your TCP SYN Packet</h2>
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]]
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-- See .init.lua hooks which set SYN and SYNERR globals.
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if syn then
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if syn ~= '' then
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Write('<dl>\r\n')
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Write('<dt>syn = unix.getsockopt(GetClientFd(), unix.SOL_TCP, unix.TCP_SAVED_SYN)\r\n')
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Write('<dd>')
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Write(EscapeHtml(EncodeLua(syn)))
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Write('\r\n')
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Write('<dt>finger.FingerSyn(syn)\r\n')
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Write('<dd>')
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Write(EscapeHtml(EncodeLua(finger.FingerSyn(syn))))
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Write('\r\n')
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Write('<dt>finger.DescribeSyn(syn)\r\n')
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Write('<dd>')
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Write(EscapeHtml(EncodeLua(finger.DescribeSyn(syn))))
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Write('\r\n')
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Write('<dt>finger.GetSynFingerOs(finger.FingerSyn(syn))\r\n')
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Write('<dd>')
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Write(EscapeHtml(EncodeLua(finger.GetSynFingerOs(finger.FingerSyn(syn)))))
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Write('\r\n')
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Write('</dl>\r\n')
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else
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Write([[
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<p>
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your operating system returned an empty string as the syn
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packet! did you remember to use setsockopt(TCP_SAVE_SYN)?
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did you call getsockopt(TCP_SAVED_SYN) more than once?
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</p>
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]])
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end
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else
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Write([[
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<p>
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your operating system most likely doesn't support TCP_SAVED_SYN
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because getsockopt() returned %s.
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</p>
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]] % {EscapeHtml(tostring(synerr))})
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end
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