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--
-- ~~~ fetch a pawsd service
--
-- require a name & service index to fetch
if not arg[1] or not arg[2] then
error("server name & index required")
end
-- imports
local PawSD = require("src/pawsd/variables")
local Servers = require("src/pawsd/servers")
require("src/utils")
local pawsd = {}
pawsd.response = require("src/pawsd/metadata")
pawsd.signature = require("src/pawsd/signature")
pawsd.service = require("src/pawsd/service")
local socket = require("socket")
local client = assert(socket.tcp())
-- get arguments & check validity
local server = Servers[arg[1]]
local index = arg[2]
if not server then
error("server not found")
end
-- connect to client
client:connect(server.host, server.port)
-- send request
local request = string.fromhex(PawSD.Magic.REQUEST .. PawSD.Version .. PawSD.Verbs.FETCH_SERVICE .. server.keyalg .. "0020" .. server.key .. index)
client:send(request)
-- print response
local response = {}
while true do
local packet, status = client:receive(1)
-- if packet then print(response) end
table.insert(response, packet)
if status == "closed" then break end
end
-- check that the response is correct
local responseMagic = pawsd.response.type(response)
if not responseMagic == PawSD.Magic.RESPONSE then
error("invalid response")
end
print("R> Response Magic: " .. responseMagic)
-- check that the status is okay
local responseStatus = pawsd.response.status(response)
if not responseStatus == PawSD.Responses.OK then
error("unsuccessful request")
end
print("R> Response Status: " .. responseStatus)
-- get signature information
local responseSignature = pawsd.signature.get(response)
local responseSignatureValid = pawsd.signature.validate(responseSignature, server.key)
print("R> Signature: " .. responseSignature)
if responseSignatureValid then
print("R> Signature Validity: VALID")
else
print("R> Signature Validity: INVALID")
end
-- get service info
local responseIndex = pawsd.service.index(response)
local responseFlags = pawsd.service.flags(response)
print("\nR> Index: " .. responseIndex)
print("R> Flags: " .. responseFlags)
-- get number of records
local responseRecords = pawsd.service.records.all(response)
-- close connection
client:close()
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