package main import ( "encoding/json" "errors" "fmt" "io" "io/ioutil" "os" "os/exec" "strings" "time" ) // TODO remove `configTemplate` once its usage has been replaced everywhere with VppConfig const configTemplate = `unix { nodaemon log %[1]s/var/log/vpp/vpp.log full-coredump cli-listen %[1]s/var/run/vpp/cli.sock runtime-dir %[1]s/var/run gid vpp } api-trace { on } api-segment { gid vpp } socksvr { socket-name %[1]s/var/run/vpp/api.sock } statseg { socket-name %[1]s/var/run/vpp/stats.sock } plugins { plugin default { disable } plugin unittest_plugin.so { enable } plugin quic_plugin.so { enable } plugin af_packet_plugin.so { enable } plugin hs_apps_plugin.so { enable } plugin http_plugin.so { enable } } ` const vclTemplate = `vcl { app-socket-api %[1]s/var/run/app_ns_sockets/%[2]s app-scope-global app-scope-local namespace-id %[2]s namespace-secret %[2]s use-mq-eventfd } ` const NetworkTopologyDir string = "topo-network/" const ContainerTopologyDir string = "topo-containers/" type Stanza struct { content string pad int } type ActionResult struct { Err error Desc string ErrOutput string StdOutput string } type JsonResult struct { Code int Desc string ErrOutput string StdOutput string } func StartServerApp(running chan error, done chan struct{}, env []string) { cmd := exec.Command("iperf3", "-4", "-s") if env != nil { cmd.Env = env } err := cmd.Start() if err != nil { msg := fmt.Errorf("failed to start iperf server: %v", err) running <- msg return } running <- nil <-done cmd.Process.Kill() } func StartClientApp(env []string, clnCh chan error, clnRes chan string) { defer func() { clnCh <- nil }() nTries := 0 for { cmd := exec.Command("iperf3", "-c", "10.10.10.1", "-u", "-l", "1460", "-b", "10g") if env != nil { cmd.Env = env } o, err := cmd.CombinedOutput() if err != nil { if nTries > 5 { clnCh <- fmt.Errorf("failed to start client app '%s'.\n%s", err, o) return } time.Sleep(1 * time.Second) nTries++ continue } else { clnRes <- fmt.Sprintf("Client output: %s", o) } break } } func waitForSyncFile(fname string) (*JsonResult, error) { var res JsonResult for i := 0; i < 360; i++ { f, err := os.Open(fname) if err == nil { defer f.Close() data, err := ioutil.ReadFile(fname) if err != nil { return nil, fmt.Errorf("read error: %v", err) } err = json.Unmarshal(data, &res) if err != nil { return nil, fmt.Errorf("json unmarshal error: %v", err) } return &res, nil } time.Sleep(1 * time.Second) } return nil, fmt.Errorf("no sync file found") } func assertFileSize(f1, f2 string) error { fi1, err := os.Stat(f1) if err != nil { return err } fi2, err1 := os.Stat(f2) if err1 != nil { return err1 } if fi1.Size() != fi2.Size() { return fmt.Errorf("file sizes differ (%d vs %d)", fi1.Size(), fi2.Size()) } return nil } func startHttpServer(running chan struct{}, done chan struct{}, addressPort, netNs string) { cmd := NewCommand([]string{"./http_server", addressPort}, netNs) err := cmd.Start() if err != nil { fmt.Println("Failed to start http server") return } running <- struct{}{} <-done cmd.Process.Kill() } func startWget(finished chan error, server_ip, port, query, netNs string) { defer func() { finished <- errors.New("wget error") }() cmd := NewCommand([]string{"wget", "--no-proxy", "--tries=5", "-q", "-O", "/dev/null", server_ip + ":" + port + "/" + query}, netNs) o, err := cmd.CombinedOutput() if err != nil { finished <- fmt.Errorf("wget error: '%v\n\n%s'", err, o) return } finished <- nil } func (c *Stanza) NewStanza(name string) *Stanza { c.Append("\n" + name + " {") c.pad += 2 return c } func (c *Stanza) Append(name string) *Stanza { c.content += strings.Repeat(" ", c.pad) c.content += name + "\n" return c } func (c *Stanza) Close() *Stanza { c.content += "}\n" c.pad -= 2 return c } func (s *Stanza) ToString() string { return s.content } func (s *Stanza) SaveToFile(fileName string) error { fo, err := os.Create(fileName) if err != nil { return err } defer fo.Close() _, err = io.Copy(fo, strings.NewReader(s.content)) return err }