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// 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"
"testing"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/protocols"
p2ptest "github.com/ethereum/go-ethereum/p2p/testing"
)
const (
TestProtocolVersion = 8
TestProtocolNetworkID = 3
)
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))))
}
func HandshakeMsgExchange(lhs, rhs *HandshakeMsg, id enode.ID) []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), BzzAddr: NewAddr(p.Node())})
}
s := p2ptest.NewProtocolTester(t, addr.ID(), n, protocol)
for _, node := range s.Nodes {
cs[node.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
bzz *Bzz
}
func newBzz(addr *BzzAddr, lightNode bool) *Bzz {
config := &BzzConfig{
OverlayAddr: addr.Over(),
UnderlayAddr: addr.Under(),
HiveParams: NewHiveParams(),
NetworkID: DefaultNetworkID,
LightNode: lightNode,
}
kad := NewKademlia(addr.OAddr, NewKadParams())
bzz := NewBzz(config, kad, nil, nil, nil)
return bzz
}
func newBzzHandshakeTester(t *testing.T, n int, addr *BzzAddr, lightNode bool) *bzzTester {
bzz := newBzz(addr, lightNode)
pt := p2ptest.NewProtocolTester(t, addr.ID(), n, bzz.runBzz)
return &bzzTester{
addr: addr,
ProtocolTester: pt,
bzz: bzz,
}
}
// should test handshakes in one exchange? parallelisation
func (s *bzzTester) testHandshake(lhs, rhs *HandshakeMsg, disconnects ...*p2ptest.Disconnect) error {
if err := s.TestExchanges(HandshakeMsgExchange(lhs, rhs, rhs.Addr.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.Nodes[0].ID(),
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, lightNode bool) *HandshakeMsg {
return &HandshakeMsg{
Version: TestProtocolVersion,
NetworkID: TestProtocolNetworkID,
Addr: addr,
LightNode: lightNode,
}
}
func TestBzzHandshakeNetworkIDMismatch(t *testing.T) {
lightNode := false
addr := RandomAddr()
s := newBzzHandshakeTester(t, 1, addr, lightNode)
node := s.Nodes[0]
err := s.testHandshake(
correctBzzHandshake(addr, lightNode),
&HandshakeMsg{Version: TestProtocolVersion, NetworkID: 321, Addr: NewAddr(node)},
&p2ptest.Disconnect{Peer: node.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) {
lightNode := false
addr := RandomAddr()
s := newBzzHandshakeTester(t, 1, addr, lightNode)
node := s.Nodes[0]
err := s.testHandshake(
correctBzzHandshake(addr, lightNode),
&HandshakeMsg{Version: 0, NetworkID: TestProtocolNetworkID, Addr: NewAddr(node)},
&p2ptest.Disconnect{Peer: node.ID(), Error: fmt.Errorf("Handshake error: Message handler error: (msg code 0): version mismatch 0 (!= %d)", TestProtocolVersion)},
)
if err != nil {
t.Fatal(err)
}
}
func TestBzzHandshakeSuccess(t *testing.T) {
lightNode := false
addr := RandomAddr()
s := newBzzHandshakeTester(t, 1, addr, lightNode)
node := s.Nodes[0]
err := s.testHandshake(
correctBzzHandshake(addr, lightNode),
&HandshakeMsg{Version: TestProtocolVersion, NetworkID: TestProtocolNetworkID, Addr: NewAddr(node)},
)
if err != nil {
t.Fatal(err)
}
}
func TestBzzHandshakeLightNode(t *testing.T) {
var lightNodeTests = []struct {
name string
lightNode bool
}{
{"on", true},
{"off", false},
}
for _, test := range lightNodeTests {
t.Run(test.name, func(t *testing.T) {
randomAddr := RandomAddr()
pt := newBzzHandshakeTester(t, 1, randomAddr, false)
node := pt.Nodes[0]
addr := NewAddr(node)
err := pt.testHandshake(
correctBzzHandshake(randomAddr, false),
&HandshakeMsg{Version: TestProtocolVersion, NetworkID: TestProtocolNetworkID, Addr: addr, LightNode: test.lightNode},
)
if err != nil {
t.Fatal(err)
}
if pt.bzz.handshakes[node.ID()].LightNode != test.lightNode {
t.Fatalf("peer LightNode flag is %v, should be %v", pt.bzz.handshakes[node.ID()].LightNode, test.lightNode)
}
})
}
}
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