ceremonyclient/go-libp2p/p2p/net/swarm/testing/testing.go

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package testing
import (
"crypto/rand"
"testing"
"time"
"github.com/libp2p/go-libp2p/core/connmgr"
"github.com/libp2p/go-libp2p/core/control"
"github.com/libp2p/go-libp2p/core/crypto"
"github.com/libp2p/go-libp2p/core/event"
"github.com/libp2p/go-libp2p/core/metrics"
"github.com/libp2p/go-libp2p/core/network"
"github.com/libp2p/go-libp2p/core/peer"
"github.com/libp2p/go-libp2p/core/peerstore"
"github.com/libp2p/go-libp2p/core/sec"
"github.com/libp2p/go-libp2p/core/sec/insecure"
"github.com/libp2p/go-libp2p/core/transport"
"github.com/libp2p/go-libp2p/p2p/host/eventbus"
"github.com/libp2p/go-libp2p/p2p/host/peerstore/pstoremem"
"github.com/libp2p/go-libp2p/p2p/muxer/yamux"
"github.com/libp2p/go-libp2p/p2p/net/swarm"
tptu "github.com/libp2p/go-libp2p/p2p/net/upgrader"
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libp2pquic "github.com/libp2p/go-libp2p/p2p/transport/quic"
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"github.com/libp2p/go-libp2p/p2p/transport/quicreuse"
"github.com/libp2p/go-libp2p/p2p/transport/tcp"
ma "github.com/multiformats/go-multiaddr"
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"github.com/quic-go/quic-go"
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"github.com/stretchr/testify/require"
)
type config struct {
disableReuseport bool
dialOnly bool
disableTCP bool
disableQUIC bool
connectionGater connmgr.ConnectionGater
sk crypto.PrivKey
swarmOpts []swarm.Option
eventBus event.Bus
clock
}
type clock interface {
Now() time.Time
}
type realclock struct{}
func (rc realclock) Now() time.Time {
return time.Now()
}
// Option is an option that can be passed when constructing a test swarm.
type Option func(*testing.T, *config)
// WithClock sets the clock to use for this swarm
func WithClock(clock clock) Option {
return func(_ *testing.T, c *config) {
c.clock = clock
}
}
func WithSwarmOpts(swarmOpts ...swarm.Option) Option {
return func(_ *testing.T, c *config) {
c.swarmOpts = swarmOpts
}
}
// OptDisableReuseport disables reuseport in this test swarm.
var OptDisableReuseport Option = func(_ *testing.T, c *config) {
c.disableReuseport = true
}
// OptDialOnly prevents the test swarm from listening.
var OptDialOnly Option = func(_ *testing.T, c *config) {
c.dialOnly = true
}
// OptDisableTCP disables TCP.
var OptDisableTCP Option = func(_ *testing.T, c *config) {
c.disableTCP = true
}
// OptDisableQUIC disables QUIC.
var OptDisableQUIC Option = func(_ *testing.T, c *config) {
c.disableQUIC = true
}
// OptConnGater configures the given connection gater on the test
func OptConnGater(cg connmgr.ConnectionGater) Option {
return func(_ *testing.T, c *config) {
c.connectionGater = cg
}
}
// OptPeerPrivateKey configures the peer private key which is then used to derive the public key and peer ID.
func OptPeerPrivateKey(sk crypto.PrivKey) Option {
return func(_ *testing.T, c *config) {
c.sk = sk
}
}
func EventBus(b event.Bus) Option {
return func(_ *testing.T, c *config) {
c.eventBus = b
}
}
// GenUpgrader creates a new connection upgrader for use with this swarm.
func GenUpgrader(t *testing.T, n *swarm.Swarm, connGater connmgr.ConnectionGater, opts ...tptu.Option) transport.Upgrader {
id := n.LocalPeer()
pk := n.Peerstore().PrivKey(id)
st := insecure.NewWithIdentity(insecure.ID, id, pk)
u, err := tptu.New([]sec.SecureTransport{st}, []tptu.StreamMuxer{{ID: yamux.ID, Muxer: yamux.DefaultTransport}}, nil, nil, connGater, opts...)
require.NoError(t, err)
return u
}
// GenSwarm generates a new test swarm.
func GenSwarm(t *testing.T, opts ...Option) *swarm.Swarm {
var cfg config
cfg.clock = realclock{}
for _, o := range opts {
o(t, &cfg)
}
var priv crypto.PrivKey
if cfg.sk == nil {
var err error
priv, _, err = crypto.GenerateEd25519Key(rand.Reader)
require.NoError(t, err)
} else {
priv = cfg.sk
}
id, err := peer.IDFromPrivateKey(priv)
require.NoError(t, err)
ps, err := pstoremem.NewPeerstore(pstoremem.WithClock(cfg.clock))
require.NoError(t, err)
ps.AddPubKey(id, priv.GetPublic())
ps.AddPrivKey(id, priv)
t.Cleanup(func() { ps.Close() })
swarmOpts := cfg.swarmOpts
swarmOpts = append(swarmOpts, swarm.WithMetrics(metrics.NewBandwidthCounter()))
if cfg.connectionGater != nil {
swarmOpts = append(swarmOpts, swarm.WithConnectionGater(cfg.connectionGater))
}
eventBus := cfg.eventBus
if eventBus == nil {
eventBus = eventbus.NewBus()
}
s, err := swarm.NewSwarm(id, ps, eventBus, swarmOpts...)
require.NoError(t, err)
upgrader := GenUpgrader(t, s, cfg.connectionGater)
if !cfg.disableTCP {
var tcpOpts []tcp.Option
if cfg.disableReuseport {
tcpOpts = append(tcpOpts, tcp.DisableReuseport())
}
tcpTransport, err := tcp.NewTCPTransport(upgrader, nil, tcpOpts...)
require.NoError(t, err)
if err := s.AddTransport(tcpTransport); err != nil {
t.Fatal(err)
}
if !cfg.dialOnly {
if err := s.Listen(ma.StringCast("/ip4/127.0.0.1/tcp/0")); err != nil {
t.Fatal(err)
}
}
}
if !cfg.disableQUIC {
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reuse, err := quicreuse.NewConnManager(quic.StatelessResetKey{}, quic.TokenGeneratorKey{})
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if err != nil {
t.Fatal(err)
}
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quicTransport, err := libp2pquic.NewTransport(priv, reuse, nil, cfg.connectionGater, nil)
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if err != nil {
t.Fatal(err)
}
if err := s.AddTransport(quicTransport); err != nil {
t.Fatal(err)
}
if !cfg.dialOnly {
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if err := s.Listen(ma.StringCast("/ip4/127.0.0.1/udp/0/quic-v1")); err != nil {
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t.Fatal(err)
}
}
}
if !cfg.dialOnly {
s.Peerstore().AddAddrs(id, s.ListenAddresses(), peerstore.PermanentAddrTTL)
}
return s
}
// DivulgeAddresses adds swarm a's addresses to swarm b's peerstore.
func DivulgeAddresses(a, b network.Network) {
id := a.LocalPeer()
addrs := a.Peerstore().Addrs(id)
b.Peerstore().AddAddrs(id, addrs, peerstore.PermanentAddrTTL)
}
// MockConnectionGater is a mock connection gater to be used by the tests.
type MockConnectionGater struct {
Dial func(p peer.ID, addr ma.Multiaddr) bool
PeerDial func(p peer.ID) bool
Accept func(c network.ConnMultiaddrs) bool
Secured func(network.Direction, peer.ID, network.ConnMultiaddrs) bool
Upgraded func(c network.Conn) (bool, control.DisconnectReason)
}
func DefaultMockConnectionGater() *MockConnectionGater {
m := &MockConnectionGater{}
m.Dial = func(p peer.ID, addr ma.Multiaddr) bool {
return true
}
m.PeerDial = func(p peer.ID) bool {
return true
}
m.Accept = func(c network.ConnMultiaddrs) bool {
return true
}
m.Secured = func(network.Direction, peer.ID, network.ConnMultiaddrs) bool {
return true
}
m.Upgraded = func(c network.Conn) (bool, control.DisconnectReason) {
return true, 0
}
return m
}
func (m *MockConnectionGater) InterceptAddrDial(p peer.ID, addr ma.Multiaddr) (allow bool) {
return m.Dial(p, addr)
}
func (m *MockConnectionGater) InterceptPeerDial(p peer.ID) (allow bool) {
return m.PeerDial(p)
}
func (m *MockConnectionGater) InterceptAccept(c network.ConnMultiaddrs) (allow bool) {
return m.Accept(c)
}
func (m *MockConnectionGater) InterceptSecured(d network.Direction, p peer.ID, c network.ConnMultiaddrs) (allow bool) {
return m.Secured(d, p, c)
}
func (m *MockConnectionGater) InterceptUpgraded(tc network.Conn) (allow bool, reason control.DisconnectReason) {
return m.Upgraded(tc)
}