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// This file is part of gnunet-go, a GNUnet-implementation in Golang.
// Copyright (C) 2019-2022 Bernd Fix >Y<
//
// gnunet-go is free software: you can redistribute it and/or modify it
// under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// gnunet-go is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// SPDX-License-Identifier: AGPL3.0-or-later
package dht
import (
"gnunet/config"
"gnunet/core"
"gnunet/util"
"math/rand"
"testing"
)
const (
NUMP = 1000 // Total number of peers
EPOCHS = 10000 // number of epochs to run
)
type Entry struct {
addr *PeerAddress // address of peer
ttl int64 // time to live (in epochs)
born int64 // epoch of birth
last int64 // last action
drop int64 // drop (in epochs)
revive int64 // revive dropped (in epochs)
online bool // peer connected?
}
// test data
var (
cfg = &config.NodeConfig{
PrivateSeed: "YGoe6XFH3XdvFRl+agx9gIzPTvxA229WFdkazEMdcOs=",
Endpoints: []string{
"r5n+ip+udp://127.0.0.1:6666",
},
}
)
// TestRT connects and disconnects random peers to test the base
// functionality of the routing table algorithms.
func TestRT(t *testing.T) {
// start deterministic randomizer
rand.Seed(19031962)
// helper functions
genRemotePeer := func() *PeerAddress {
d := make([]byte, 32)
if _, err := rand.Read(d); err != nil {
panic(err)
}
return NewPeerAddress(util.NewPeerID(d))
}
// create routing table and start command handler
local, err := core.NewLocalPeer(cfg)
if err != nil {
t.Fatal(err)
}
rt := NewRoutingTable(NewPeerAddress(local.GetID()))
// create a task list
tasks := make([]*Entry, NUMP)
for i := range tasks {
tasks[i] = new(Entry)
tasks[i].addr = genRemotePeer()
tasks[i].born = rand.Int63n(EPOCHS)
tasks[i].ttl = 1000 + rand.Int63n(7000)
tasks[i].drop = 2000 + rand.Int63n(3000)
tasks[i].revive = rand.Int63n(2000)
tasks[i].online = false
}
// actions:
connected := func(task *Entry, e int64, msg string) {
rt.Add(task.addr, true)
task.online = true
task.last = e
t.Logf("[%6d] %s %s\n", e, task.addr, msg)
}
disconnected := func(task *Entry, e int64, msg string) {
rt.Remove(task.addr)
task.online = false
task.last = e
t.Logf("[%6d] %s %s\n", e, task.addr, msg)
}
// run epochs
var e int64
for e = 0; e < EPOCHS; e++ {
for _, task := range tasks {
// birth
if task.born == e {
connected(task, e, "connected")
continue
}
// death
if task.born+task.ttl == e {
disconnected(task, e, "disconnected")
continue
}
if task.online {
// drop out
if task.last+task.drop == e {
disconnected(task, e, "dropped out")
continue
}
} else {
// drop in
if task.last+task.drop == e {
connected(task, e, "dropped in")
continue
}
}
}
}
// execute some routing functions on remaining table
k := genRemotePeer()
bf := NewPeerBloomFilter()
n := rt.SelectClosestPeer(k, bf)
t.Logf("Closest: %s -> %s\n", k, n)
n = rt.SelectRandomPeer(bf)
t.Logf("Random: %s\n", n)
}
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