neoneo-go/pkg/network/helper_test.go
Roman Khimov 23f118a1a9 network: rework discoverer/server interaction
* treat connected/handshaked peers separately in the discoverer, save
   "original" address for connected ones, it can be a name instead of IP and
   it's important to keep it to avoid reconnections
 * store name->IP mapping for seeds if and when they're connected to avoid
   reconnections
 * block seed if it's detected to be our own node (which is often the case for
   small private networks)
 * add an event for handshaked peers in the server, connected but
   non-handshaked ones are not really helpful for MinPeers or GetAddr logic

Fixes #2796.
2022-11-17 17:07:19 +03:00

215 lines
5.3 KiB
Go

package network
import (
"context"
"errors"
"fmt"
"net"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/nspcc-dev/neo-go/internal/fakechain"
"github.com/nspcc-dev/neo-go/pkg/config"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/nspcc-dev/neo-go/pkg/network/payload"
"github.com/stretchr/testify/require"
"go.uber.org/zap/zaptest"
)
type testDiscovery struct {
sync.Mutex
bad []string
connected []string
unregistered []string
backfill []string
}
func newTestDiscovery([]string, time.Duration, Transporter) Discoverer { return new(testDiscovery) }
func (d *testDiscovery) BackFill(addrs ...string) {
d.Lock()
defer d.Unlock()
d.backfill = append(d.backfill, addrs...)
}
func (d *testDiscovery) PoolCount() int { return 0 }
func (d *testDiscovery) RegisterSelf(p AddressablePeer) {
d.Lock()
defer d.Unlock()
d.bad = append(d.bad, p.ConnectionAddr())
}
func (d *testDiscovery) GetFanOut() int {
d.Lock()
defer d.Unlock()
return (len(d.connected) + len(d.backfill)) * 2 / 3
}
func (d *testDiscovery) NetworkSize() int {
d.Lock()
defer d.Unlock()
return len(d.connected) + len(d.backfill)
}
func (d *testDiscovery) RegisterGood(AddressablePeer) {}
func (d *testDiscovery) RegisterConnected(p AddressablePeer) {
d.Lock()
defer d.Unlock()
d.connected = append(d.connected, p.ConnectionAddr())
}
func (d *testDiscovery) UnregisterConnected(p AddressablePeer, force bool) {
d.Lock()
defer d.Unlock()
d.unregistered = append(d.unregistered, p.ConnectionAddr())
}
func (d *testDiscovery) UnconnectedPeers() []string {
d.Lock()
defer d.Unlock()
return d.unregistered
}
func (d *testDiscovery) RequestRemote(n int) {}
func (d *testDiscovery) BadPeers() []string {
d.Lock()
defer d.Unlock()
return d.bad
}
func (d *testDiscovery) GoodPeers() []AddressWithCapabilities { return []AddressWithCapabilities{} }
var defaultMessageHandler = func(t *testing.T, msg *Message) {}
type localPeer struct {
netaddr net.TCPAddr
server *Server
version *payload.Version
lastBlockIndex uint32
handshaked int32 // TODO: use atomic.Bool after #2626.
isFullNode bool
t *testing.T
messageHandler func(t *testing.T, msg *Message)
pingSent int
getAddrSent int
droppedWith atomic.Value
}
func newLocalPeer(t *testing.T, s *Server) *localPeer {
naddr, _ := net.ResolveTCPAddr("tcp", "0.0.0.0:0")
return &localPeer{
t: t,
server: s,
netaddr: *naddr,
messageHandler: defaultMessageHandler,
}
}
func (p *localPeer) ConnectionAddr() string {
return p.netaddr.String()
}
func (p *localPeer) RemoteAddr() net.Addr {
return &p.netaddr
}
func (p *localPeer) PeerAddr() net.Addr {
return &p.netaddr
}
func (p *localPeer) StartProtocol() {}
func (p *localPeer) Disconnect(err error) {
if p.droppedWith.Load() == nil {
p.droppedWith.Store(err)
}
fmt.Println("peer dropped:", err)
p.server.unregister <- peerDrop{p, err}
}
func (p *localPeer) BroadcastPacket(_ context.Context, m []byte) error {
if len(m) == 0 {
return errors.New("empty msg")
}
msg := &Message{}
r := io.NewBinReaderFromBuf(m)
for r.Len() > 0 {
err := msg.Decode(r)
if err == nil {
p.messageHandler(p.t, msg)
}
}
return nil
}
func (p *localPeer) EnqueueP2PMessage(msg *Message) error {
return p.EnqueueHPMessage(msg)
}
func (p *localPeer) EnqueueP2PPacket(m []byte) error {
return p.BroadcastPacket(context.TODO(), m)
}
func (p *localPeer) BroadcastHPPacket(ctx context.Context, m []byte) error {
return p.BroadcastPacket(ctx, m)
}
func (p *localPeer) EnqueueHPMessage(msg *Message) error {
p.messageHandler(p.t, msg)
return nil
}
func (p *localPeer) EnqueueHPPacket(m []byte) error {
return p.BroadcastPacket(context.TODO(), m)
}
func (p *localPeer) Version() *payload.Version {
return p.version
}
func (p *localPeer) LastBlockIndex() uint32 {
return p.lastBlockIndex
}
func (p *localPeer) HandleVersion(v *payload.Version) error {
p.version = v
return nil
}
func (p *localPeer) SendVersion() error {
m, err := p.server.getVersionMsg()
if err != nil {
return err
}
_ = p.EnqueueHPMessage(m)
return nil
}
func (p *localPeer) SendVersionAck(m *Message) error {
_ = p.EnqueueHPMessage(m)
return nil
}
func (p *localPeer) HandleVersionAck() error {
atomic.StoreInt32(&p.handshaked, 1)
return nil
}
func (p *localPeer) SetPingTimer() {
p.pingSent++
}
func (p *localPeer) HandlePing(ping *payload.Ping) error {
p.lastBlockIndex = ping.LastBlockIndex
return nil
}
func (p *localPeer) HandlePong(pong *payload.Ping) error {
p.lastBlockIndex = pong.LastBlockIndex
p.pingSent--
return nil
}
func (p *localPeer) Handshaked() bool {
return atomic.LoadInt32(&p.handshaked) != 0
}
func (p *localPeer) IsFullNode() bool {
return p.isFullNode
}
func (p *localPeer) AddGetAddrSent() {
p.getAddrSent++
}
func (p *localPeer) CanProcessAddr() bool {
p.getAddrSent--
return p.getAddrSent >= 0
}
func newTestServer(t *testing.T, serverConfig ServerConfig) *Server {
return newTestServerWithCustomCfg(t, serverConfig, nil)
}
func newTestServerWithCustomCfg(t *testing.T, serverConfig ServerConfig, protocolCfg func(*config.ProtocolConfiguration)) *Server {
s, err := newServerFromConstructors(serverConfig, fakechain.NewFakeChainWithCustomCfg(protocolCfg), new(fakechain.FakeStateSync), zaptest.NewLogger(t),
newFakeTransp, newTestDiscovery)
require.NoError(t, err)
return s
}