/luadns

Lua dns resolver, supports udp/tcp, supports ECS (edns-client-subnet).

Primary LanguageLuaMIT LicenseMIT

luadns

Lua dns resolver, supports udp/tcp, supports ECS(edns-client-subnet).

example

require "luadns"

local host = "www.google.com"
local server = "8.8.8.8"
local port = 53
local timeout = 3
local subnet = "111.111.111.111/24"
dns = get_dns_resolver(host,server,port,timeout,"udp",false,nil)
print("udp,no subnet")
if dns then for i,v in pairs(dns) do print(v) end end
dns = get_dns_resolver(host,server,port,timeout,"udp",true,subnet)
print("\nudp,with subnet")
if dns then for i,v in pairs(dns) do print(v) end end
dns = get_dns_resolver(host,server,port,timeout,"tcp",false,nil)
print("\ntcp,no subnet")
if dns then for i,v in pairs(dns) do print(v) end end
dns = get_dns_resolver(host,server,port,timeout,"tcp",true,subnet)
print("\ntcp,with subnet")
if dns then for i,v in pairs(dns) do print(v) end end

rusult

udp,no subnet
216.58.200.36

udp,with subnet
172.217.24.4

tcp,no subnet
74.125.68.105
74.125.68.104
74.125.68.106
74.125.68.103
74.125.68.147
74.125.68.99

tcp,with subnet
216.58.196.228

其它

直接使用udp连接，有被抢答的可能，建议使用tcp连接