41 lines
886 B
Lua
41 lines
886 B
Lua
local resolver = require "resty.dns.resolver"
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local resolvers = {%DNS_RESOLVERS%}
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local ip = ngx.var.remote_addr
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function get_reverse()
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local r, err = resolver:new{nameservers=resolvers, retrans=2, timeout=2000}
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if not r then
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return ""
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end
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local rdns = ""
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local answers, err = r:reverse_query(ip)
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if not answers.errcode then
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for ak, av in ipairs(answers) do
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if av.ptrdname then
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rdns = av.ptrdname
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break
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end
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end
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end
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return rdns
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end
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function get_ips(fqdn)
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local r, err = resolver:new{nameservers=resolvers, retrans=2, timeout=2000}
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if not r then
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return ""
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end
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local ips = {}
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local answers, err, tries = r:query(fqdn, nil, {})
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for ak, av in ipairs(answers) do
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if av.address then
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table.insert(ips, av.address)
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end
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end
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return ips
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end
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function ip_to_arpa()
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return resolver.arpa_str(ip):gsub("%.in%-addr%.arpa", ""):gsub("%.ip6%.arpa", "")
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end
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