// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package network
import (
"flag"
"fmt"
"os"
"sync"
"testing"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/discover"
"github.com/ethereum/go-ethereum/p2p/protocols"
p2ptest "github.com/ethereum/go-ethereum/p2p/testing"
)
var (
loglevel = flag.Int("loglevel", 2, "verbosity of logs")
)
func init() {
flag.Parse()
log.Root().SetHandler(log.LvlFilterHandler(log.Lvl(*loglevel), log.StreamHandler(os.Stderr, log.TerminalFormat(true))))
}
type testStore struct {
sync.Mutex
values map[string][]byte
}
func newTestStore() *testStore {
return &testStore{values: make(map[string][]byte)}
}
func (t *testStore) Load(key string) ([]byte, error) {
t.Lock()
defer t.Unlock()
v, ok := t.values[key]
if !ok {
return nil, fmt.Errorf("key not found: %s", key)
}
return v, nil
}
func (t *testStore) Save(key string, v []byte) error {
t.Lock()
defer t.Unlock()
t.values[key] = v
return nil
}
func HandshakeMsgExchange(lhs, rhs *HandshakeMsg, id discover.NodeID) []p2ptest.Exchange {
return []p2ptest.Exchange{
{
Expects: []p2ptest.Expect{
{
Code: 0,
Msg: lhs,
Peer: id,
},
},
},
{
Triggers: []p2ptest.Trigger{
{
Code: 0,
Msg: rhs,
Peer: id,
},
},
},
}
}
func newBzzBaseTester(t *testing.T, n int, addr *BzzAddr, spec *protocols.Spec, run func(*BzzPeer) error) *bzzTester {
cs := make(map[string]chan bool)
srv := func(p *BzzPeer) error {
defer func() {
if cs[p.ID().String()] != nil {
close(cs[p.ID().String()])
}
}()
return run(p)
}
protocol := func(p *p2p.Peer, rw p2p.MsgReadWriter) error {
return srv(&BzzPeer{
Peer: protocols.NewPeer(p, rw, spec),
localAddr: addr,
BzzAddr: NewAddrFromNodeID(p.ID()),
})
}
s := p2ptest.NewProtocolTester(t, NewNodeIDFromAddr(addr), n, protocol)
for _, id := range s.IDs {
cs[id.String()] = make(chan bool)
}
return &bzzTester{
addr: addr,
ProtocolTester: s,
cs: cs,
}
}
type bzzTester struct {
*p2ptest.ProtocolTester
addr *BzzAddr
cs map[string]chan bool
}
func newBzzHandshakeTester(t *testing.T, n int, addr *BzzAddr) *bzzTester {
config := &BzzConfig{
OverlayAddr: addr.Over(),
UnderlayAddr: addr.Under(),
HiveParams: NewHiveParams(),
NetworkID: DefaultNetworkID,
}
kad := NewKademlia(addr.OAddr, NewKadParams())
bzz := NewBzz(config, kad, nil, nil, nil)
s := p2ptest.NewProtocolTester(t, NewNodeIDFromAddr(addr), 1, bzz.runBzz)
return &bzzTester{
addr: addr,
ProtocolTester: s,
}
}
// should test handshakes in one exchange? parallelisation
func (s *bzzTester) testHandshake(lhs, rhs *HandshakeMsg, disconnects ...*p2ptest.Disconnect) error {
var peers []discover.NodeID
id := NewNodeIDFromAddr(rhs.Addr)
if len(disconnects) > 0 {
for _, d := range disconnects {
peers = append(peers, d.Peer)
}
} else {
peers = []discover.NodeID{id}
}
if err := s.TestExchanges(HandshakeMsgExchange(lhs, rhs, id)...); err != nil {
return err
}
if len(disconnects) > 0 {
return s.TestDisconnected(disconnects...)
}
// If we don't expect disconnect, ensure peers remain connected
err := s.TestDisconnected(&p2ptest.Disconnect{
Peer: s.IDs[0],
Error: nil,
})
if err == nil {
return fmt.Errorf("Unexpected peer disconnect")
}
if err.Error() != "timed out waiting for peers to disconnect" {
return err
}
return nil
}
func correctBzzHandshake(addr *BzzAddr) *HandshakeMsg {
return &HandshakeMsg{
Version: 4,
NetworkID: DefaultNetworkID,
Addr: addr,
}
}
func TestBzzHandshakeNetworkIDMismatch(t *testing.T) {
addr := RandomAddr()
s := newBzzHandshakeTester(t, 1, addr)
id := s.IDs[0]
err := s.testHandshake(
correctBzzHandshake(addr),
&HandshakeMsg{Version: 4, NetworkID: 321, Addr: NewAddrFromNodeID(id)},
&p2ptest.Disconnect{Peer: id, Error: fmt.Errorf("Handshake error: Message handler error: (msg code 0): network id mismatch 321 (!= 3)")},
)
if err != nil {
t.Fatal(err)
}
}
func TestBzzHandshakeVersionMismatch(t *testing.T) {
addr := RandomAddr()
s := newBzzHandshakeTester(t, 1, addr)
id := s.IDs[0]
err := s.testHandshake(
correctBzzHandshake(addr),
&HandshakeMsg{Version: 0, NetworkID: 3, Addr: NewAddrFromNodeID(id)},
&p2ptest.Disconnect{Peer: id, Error: fmt.Errorf("Handshake error: Message handler error: (msg code 0): version mismatch 0 (!= 4)")},
)
if err != nil {
t.Fatal(err)
}
}
func TestBzzHandshakeSuccess(t *testing.T) {
addr := RandomAddr()
s := newBzzHandshakeTester(t, 1, addr)
id := s.IDs[0]
err := s.testHandshake(
correctBzzHandshake(addr),
&HandshakeMsg{Version: 4, NetworkID: 3, Addr: NewAddrFromNodeID(id)},
)
if err != nil {
t.Fatal(err)
}
}
