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// Copyright 2022 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package proxyapp
import (
"net"
"net/rpc"
"net/rpc/jsonrpc"
"net/url"
"sync"
"testing"
"github.com/google/syzkaller/vm/proxyapp/proxyrpc"
"github.com/google/syzkaller/vm/vmimpl"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/mock"
)
func testTCPEnv(port string) *vmimpl.Env {
return &vmimpl.Env{
Config: []byte(`
{
"rpc_server_uri": "localhost:` + port + `",
"config": {
"internal_values": 123
}
}
`)}
}
func proxyAppServerTCPFixture(t *testing.T) (*mockProxyAppInterface, string, *proxyAppParams) {
mProxyAppServer, port, _ := makeMockProxyAppServer(t)
return initProxyAppServerFixture(mProxyAppServer), port, makeTestParams()
}
func TestCtor_TCP_Ok(t *testing.T) {
_, port, params := proxyAppServerTCPFixture(t)
p, err := ctor(params, testTCPEnv(port))
assert.Nil(t, err)
assert.Equal(t, 2, p.Count())
}
func TestCtor_TCP_WrongPort(t *testing.T) {
p, err := ctor(makeTestParams(), testTCPEnv("5"))
assert.NotNil(t, err)
assert.Nil(t, p)
}
func TestCtor_TCP_Reconnect_On_LostConnection(t *testing.T) {
mProxyAppServer, port, closeServerConnections := makeMockProxyAppServer(t)
onConnect := make(chan bool, 1)
mProxyAppServer.
On("CreatePool", mock.Anything, mock.Anything).
Run(func(args mock.Arguments) {
out := args.Get(1).(*proxyrpc.CreatePoolResult)
out.Count = 2
onConnect <- true
}).
Return(nil).
Times(2).
On("PoolLogs", mock.Anything, mock.Anything).
Run(func(args mock.Arguments) {
select {
case mProxyAppServer.OnLogsReceived <- true:
default:
}
}).
Return(nil)
ctor(makeTestParams(), testTCPEnv(port))
<-onConnect
<-mProxyAppServer.OnLogsReceived
closeServerConnections()
<-onConnect
<-mProxyAppServer.OnLogsReceived
}
func TestCtor_TCP_Reconnect_PoolChanged(t *testing.T) {
mProxyAppServer, port, closeServerConnections := makeMockProxyAppServer(t)
onConnect := make(chan bool, 1)
mProxyAppServer.
On("CreatePool", mock.Anything, mock.Anything).
Run(func(args mock.Arguments) {
out := args.Get(1).(*proxyrpc.CreatePoolResult)
out.Count = 2
onConnect <- true
}).
Return(nil).
Once().
On("CreatePool", mock.Anything, mock.Anything).
Run(func(args mock.Arguments) {
out := args.Get(1).(*proxyrpc.CreatePoolResult)
out.Count = 1
onConnect <- true
}).
Return(nil).
On("PoolLogs", mock.Anything, mock.Anything).
Return(nil)
p, _ := ctor(makeTestParams(), testTCPEnv(port))
<-onConnect
closeServerConnections()
for i := 0; i < 10; i++ {
<-onConnect
p.(*pool).mu.Lock()
assert.Nil(t, p.(*pool).proxy) // still can't initialize
p.(*pool).mu.Unlock()
}
}
func makeMockProxyAppServer(t *testing.T) (*mockProxyAppInterface, string, func()) {
handler := makeMockProxyAppInterface(t)
server := rpc.NewServer()
server.RegisterName("ProxyVM", struct{ proxyrpc.ProxyAppInterface }{handler})
l, e := net.Listen("tcp", ":0")
if e != nil {
t.Fatalf("listen error: %v", e)
}
dest, err := url.Parse("http://" + l.Addr().String())
if err != nil {
t.Fatalf("failed to get server endpoint addr: %v", err)
}
connsMu := sync.Mutex{}
var conns []net.Conn
go func() {
for {
conn, err := l.Accept()
if err != nil {
panic("failed to accept connection")
}
go server.ServeCodec(jsonrpc.NewServerCodec(conn))
connsMu.Lock()
conns = append(conns, conn)
connsMu.Unlock()
}
}()
return handler, dest.Port(), func() {
connsMu.Lock()
defer connsMu.Unlock()
for _, conn := range conns {
conn.Close()
}
}
}
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