64 lines
1.8 KiB
Lua
64 lines
1.8 KiB
Lua
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-- source the lib file with the function
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dofile("rns-lib.lua")
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rr1 = record.new_frm_str("www.miek.nl IN A 192.168.1.2", 0, nil)
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rr2 = record.new_frm_str("miek.nl IN ns gaap", 0, nil)
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rr3 = record.new_frm_str("miek.nl IN ns gaap2", 0, nil)
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rr4 = record.new_frm_str("www.atoom.net. IN A 192.168.1.2", 0, nil)
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rr5 = record.new_frm_str("www.nlnetlabs.nl IN A 192.168.1.2", 0, nil)
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rr6 = record.new_frm_str("www.nlnet.nl IN A 192.168.1.2", 0, nil)
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pkt = packet.new()
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pkt = packet.push_rr(pkt, LDNS_SECTION_ANSWER, rr1)
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pkt = packet.push_rr(pkt, LDNS_SECTION_ANSWER, rr4)
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pkt = packet.push_rr(pkt, LDNS_SECTION_AUTHORITY, rr2)
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pkt = packet.push_rr(pkt, LDNS_SECTION_AUTHORITY, rr3)
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---- Setup a server to listen to UDP -- bit strange to first
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-- make a rdf out of it and then continue with the sockaddr struct
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rdf_ip = rdf.new_frm_str(LDNS_RDF_TYPE_A, "127.0.0.1")
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socket = udp.server_open(rdf_ip, 5353)
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if socket == nil then
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os.exit(EXIT_FAILURE)
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end
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while true do
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-- read from the socket, this blocks...
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wirebuf, sockaddr_from = udp.read(socket)
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-- wrap this in new functions
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if wirebuf == nil then
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lua_debug("nothing received")
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else
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-- somebody is writing
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wirepkt = buffer.to_pkt(wirebuf)
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lua_debug("received from the interface")
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-- next we must send it to our recursive nameserver
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-- and pick up the result
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-- then we modify the result somewhat and sent it back
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-- to the client
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id = packet.id(wirepkt);
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packet.print(wirepkt)
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-- set the id on the outgoing packet
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packet.set_id(pkt, id)
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lua_packet_ancount_incr(pkt, 2)
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wirebuf2 = packet.to_buf(pkt)
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-- write back to the client
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bytes = lua_udp_write(socket, wirebuf2, sockaddr_from)
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if bytes == -1 then
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lua_debug("write error")
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else
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lua_debug("wrote bytes", bytes)
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packet.print(pkt)
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end
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end
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end
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udp.close(socket)
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