Software / code / prosody
Annotate
tools/dnsregistry.lua @ 13126:d043834f15d2
mod_http: Use RFC 7239 Forwarded header to find original client IP
Prefer over X-Forwarded-* since it has an actual specification.
Main practical difference is that Forwarded may carry more properties
than only the IP address since it is a structured header.
Since we parse it into an array, it is easier to do the logical thing
and iterate backwards trough proxies until an untrusted one is
encountered. Compare the handling of X-Forwarded-For.
The 'secure' field now accounts for the full chain of proxies, which
must be secure all the way to be considered secure.
| author | Kim Alvefur <zash@zash.se> |
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| date | Sat, 03 Jun 2023 17:10:04 +0200 |
| parent | 12855:3306807c0619 |
| child | 13142:879a6a33c21b |
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tools.dnsregistry: For converting IANA DNS registry data to Lua table
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1 -- Generate util/dnsregistry.lua from IANA HTTP status code registry |
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2 local xml = require "util.xml"; |
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3 local registries = xml.parse(io.read("*a"), { allow_processing_instructions = true }); |
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4 |
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5 print("-- Source: https://www.iana.org/assignments/dns-parameters/dns-parameters.xml"); |
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6 print(os.date("-- Generated on %Y-%m-%d")) |
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7 |
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8 local registry_mapping = { |
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9 ["dns-parameters-2"] = "classes"; |
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10 ["dns-parameters-4"] = "types"; |
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11 ["dns-parameters-6"] = "errors"; |
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12 }; |
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13 |
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14 print("return {"); |
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15 for registry in registries:childtags("registry") do |
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16 local registry_name = registry_mapping[registry.attr.id]; |
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17 if registry_name then |
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18 print("\t" .. registry_name .. " = {"); |
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19 for record in registry:childtags("record") do |
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20 local record_name = record:get_child_text("name"); |
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21 local record_type = record:get_child_text("type"); |
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22 local record_desc = record:get_child_text("description"); |
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23 local record_code = tonumber(record:get_child_text("value")); |
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24 |
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25 if tostring(record):lower():match("reserved") or tostring(record):lower():match("unassigned") then |
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26 record_code = nil; |
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27 end |
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28 |
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29 if registry_name == "classes" and record_code then |
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30 record_type = record_desc and record_desc:match("%((%w+)%)$") |
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31 if record_type then |
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32 print(("\t\t[%q] = %d; [%d] = %q;"):format(record_type, record_code, record_code, record_type)) |
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33 end |
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34 elseif registry_name == "types" and record_type and record_code then |
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35 print(("\t\t[%q] = %d; [%d] = %q;"):format(record_type, record_code, record_code, record_type)) |
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36 elseif registry_name == "errors" and record_code and record_name then |
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37 print(("\t\t[%d] = %q; [%q] = %q;"):format(record_code, record_name, record_name, record_desc or record_name)); |
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38 end |
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39 end |
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40 print("\t};"); |
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41 end |
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42 end |
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43 print("};"); |
