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-- Test cases for dnsjit.lib.trie
local function key_compare(node1, node2)
local key1, keylen1 = node1:key()
local key2, keylen2 = node2:key()
if keylen1 ~= keylen2 then return false end
for i = 0, keylen1 - 1 do
if key1[i] ~= key2[i] then return false end
end
return true
end
-----------------------------------------------------
-- binary-key trie with which stores numbers
-----------------------------------------------------
local input = require("dnsjit.input.pcap").new()
local layer = require("dnsjit.filter.layer").new()
local object = require("dnsjit.core.objects")
local ip = require("dnsjit.lib.ip")
local trie = require("dnsjit.lib.trie").new("uint32_t", true, 16)
input:open_offline("pellets.pcap-dist")
layer:producer(input)
local prod, pctx = layer:produce()
-- fill trie with values
while true do
local obj = prod(pctx)
if obj == nil then break end
local pkt = obj:cast_to(object.IP6)
if pkt ~= nil then
-- count number of packets per IP
local node = trie:get_ins(pkt.src)
node:set(node:get() + 1)
end
end
assert(trie:weight() == 29)
-- test iterator and check values
local iter = trie:iter()
local node = iter:node()
local npkts = 0
local i = 0
while node ~= nil do
i = i + 1
local ip6str = ip.tostring(node:key())
local val = tonumber(node:get())
npkts = npkts + val
if i == 1 then assert(ip6str == "2001:0db8:beef:feed:0000:0000:0000:0003" and val == 1) end
if i == 1 then
local first = trie:get_first()
assert(key_compare(node, first))
assert(node:get() == first:get())
end
if i == 2 then assert(ip6str == "2001:0db8:beef:feed:0000:0000:0000:0004" and val == 1) end
if i == 2 then
local second = trie:get_try(node:key())
assert(key_compare(node, second))
assert(node:get() == second:get())
end
if i == 5 then assert(ip6str == "2001:0db8:beef:feed:0000:0000:0000:0008" and val == 10) end
if i == 29 then assert(ip6str == "2001:0db8:beef:feed:0000:0000:0000:0042" and val == 1) end
iter:next()
node = iter:node()
end
assert(npkts == 91)
trie:clear()
assert(trie:weight() == 0)
-----------------------------------------------------
-- string-key trie with which stores objects
-----------------------------------------------------
local input = require("dnsjit.input.pcap").new()
local layer = require("dnsjit.filter.layer").new()
local object = require("dnsjit.core.objects")
local trie = require("dnsjit.lib.trie").new("core_object_t*")
input:open_offline("dns.pcap-dist")
layer:producer(input)
local prod, pctx = layer:produce()
-- fill trie with values
while true do
local obj = prod(pctx)
if obj == nil then break end
local pkt = obj:cast_to(object.IP)
if pkt ~= nil then
local node = trie:get_ins(pkt:source())
local pkt2 = node:get()
if val ~= nil then
val:free()
end
node:set(pkt:copy():uncast())
end
end
assert(trie:weight() == 3)
local node
node = trie:get_first()
assert(node:key() == "172.17.0.10")
pkt = node:get():cast()
assert(pkt:source() == "172.17.0.10")
assert(pkt.id == 0x538b)
pkt:free()
node = trie:get_try("8.8.8.8")
assert(node:key() == "8.8.8.8")
pkt = node:get():cast()
assert(pkt:source() == "8.8.8.8")
pkt:free()
node = trie:get_try("216.58.218.206")
assert(node:key() == "216.58.218.206")
pkt = node:get():cast()
assert(pkt:source() == "216.58.218.206")
pkt:free()
node = trie:get_try("nonexistent")
assert(node == nil)
trie:clear()
assert(trie:weight() == 0)
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