neo-go/pkg/network/server_test.go

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package network
import (
"net"
"strconv"
"testing"
"time"
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"github.com/nspcc-dev/neo-go/pkg/network/capability"
"github.com/nspcc-dev/neo-go/pkg/network/payload"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestSendVersion(t *testing.T) {
var (
s = newTestServer(t, ServerConfig{Port: 0, UserAgent: "/test/"})
p = newLocalPeer(t, s)
)
// we need to set listener at least to handle dynamic port correctly
go s.transport.Accept()
require.Eventually(t, func() bool { return s.transport.Address() != "" }, time.Second, 10*time.Millisecond)
p.messageHandler = func(t *testing.T, msg *Message) {
// listener is already set, so Address() gives us proper address with port
_, p, err := net.SplitHostPort(s.transport.Address())
assert.NoError(t, err)
port, err := strconv.ParseUint(p, 10, 16)
assert.NoError(t, err)
assert.Equal(t, CMDVersion, msg.Command)
assert.IsType(t, msg.Payload, &payload.Version{})
version := msg.Payload.(*payload.Version)
assert.NotZero(t, version.Nonce)
assert.Equal(t, 1, len(version.Capabilities))
assert.ElementsMatch(t, []capability.Capability{
{
Type: capability.TCPServer,
Data: &capability.Server{
Port: uint16(port),
},
},
}, version.Capabilities)
assert.Equal(t, uint32(0), version.Version)
assert.Equal(t, []byte("/test/"), version.UserAgent)
}
require.NoError(t, p.SendVersion())
}
// Server should reply with a verack after receiving a valid version.
func TestVerackAfterHandleVersionCmd(t *testing.T) {
var (
s = newTestServer(t, ServerConfig{})
p = newLocalPeer(t, s)
)
na, _ := net.ResolveTCPAddr("tcp", "0.0.0.0:3000")
p.netaddr = *na
// Should have a verack
p.messageHandler = func(t *testing.T, msg *Message) {
assert.Equal(t, CMDVerack, msg.Command)
}
capabilities := []capability.Capability{
{
Type: capability.FullNode,
Data: &capability.Node{
StartHeight: 0,
},
},
{
Type: capability.TCPServer,
Data: &capability.Server{
Port: 3000,
},
},
}
version := payload.NewVersion(0, 1337, "/NEO-GO/", capabilities)
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require.NoError(t, s.handleVersionCmd(p, version))
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}
// Server should not reply with a verack after receiving a
// invalid version and disconnects the peer.
func TestServerNotSendsVerack(t *testing.T) {
var (
s = newTestServer(t, ServerConfig{Net: 56753})
p = newLocalPeer(t, s)
p2 = newLocalPeer(t, s)
)
s.id = 1
finished := make(chan struct{})
go func() {
s.run()
close(finished)
}()
defer func() {
// close via quit as server was started via `run()`, not `Start()`
close(s.quit)
<-finished
}()
na, _ := net.ResolveTCPAddr("tcp", "0.0.0.0:3000")
p.netaddr = *na
p2.netaddr = *na
s.register <- p
capabilities := []capability.Capability{
{
Type: capability.FullNode,
Data: &capability.Node{
StartHeight: 0,
},
},
{
Type: capability.TCPServer,
Data: &capability.Server{
Port: 3000,
},
},
}
// identical id's
version := payload.NewVersion(56753, 1, "/NEO-GO/", capabilities)
err := s.handleVersionCmd(p, version)
assert.NotNil(t, err)
assert.Equal(t, errIdenticalID, err)
// Different IDs, but also different magics
version.Nonce = 2
version.Magic = 56752
err = s.handleVersionCmd(p, version)
assert.NotNil(t, err)
assert.Equal(t, errInvalidNetwork, err)
// Different IDs and same network, make handshake pass.
version.Magic = 56753
require.NoError(t, s.handleVersionCmd(p, version))
require.NoError(t, p.HandleVersionAck())
require.Equal(t, true, p.Handshaked())
// Second handshake from the same peer should fail.
s.register <- p2
err = s.handleVersionCmd(p2, version)
assert.NotNil(t, err)
require.Equal(t, errAlreadyConnected, err)
}