func connector(context *cli.Context) int {
config, configFilename, err := lib.GetConfig(context)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to read config file: %s", err)
return 1
}
logFileMaxBytes := config.LogFileMaxMegabytes * 1024 * 1024
var logWriter io.Writer
logWriter, err = log.NewLogRoller(config.LogFileName, logFileMaxBytes, config.LogMaxFiles)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to start log roller: %s", err)
return 1
}
if context.Bool("log-to-console") {
logWriter = io.MultiWriter(logWriter, os.Stderr)
}
logLevel, ok := log.LevelFromString(config.LogLevel)
if !ok {
fmt.Fprintf(os.Stderr, "Log level %s is not recognized", config.LogLevel)
return 1
}
log.SetLevel(logLevel)
log.SetWriter(logWriter)
if configFilename == "" {
log.Info("No config file was found, so using defaults")
}
log.Error(lib.FullName)
fmt.Println(lib.FullName)
if !config.CloudPrintingEnable && !config.LocalPrintingEnable {
log.Error("Cannot run connector with both local_printing_enable and cloud_printing_enable set to false")
return 1
}
if _, err := os.Stat(config.MonitorSocketFilename); !os.IsNotExist(err) {
if err != nil {
log.Errorf("Failed to stat monitor socket: %s", err)
} else {
log.Errorf(
"A connector is already running, or the monitoring socket %s wasn't cleaned up properly",
config.MonitorSocketFilename)
}
return 1
}
jobs := make(chan *lib.Job, 10)
xmppNotifications := make(chan xmpp.PrinterNotification, 5)
var g *gcp.GoogleCloudPrint
var x *xmpp.XMPP
if config.CloudPrintingEnable {
xmppPingTimeout, err := time.ParseDuration(config.XMPPPingTimeout)
if err != nil {
log.Fatalf("Failed to parse xmpp ping timeout: %s", err)
return 1
}
xmppPingInterval, err := time.ParseDuration(config.XMPPPingInterval)
if err != nil {
log.Fatalf("Failed to parse xmpp ping interval default: %s", err)
return 1
}
g, err = gcp.NewGoogleCloudPrint(config.GCPBaseURL, config.RobotRefreshToken,
config.UserRefreshToken, config.ProxyName, config.GCPOAuthClientID,
config.GCPOAuthClientSecret, config.GCPOAuthAuthURL, config.GCPOAuthTokenURL,
config.GCPMaxConcurrentDownloads, jobs)
if err != nil {
log.Error(err)
return 1
}
x, err = xmpp.NewXMPP(config.XMPPJID, config.ProxyName, config.XMPPServer, config.XMPPPort,
xmppPingTimeout, xmppPingInterval, g.GetRobotAccessToken, xmppNotifications)
if err != nil {
log.Error(err)
return 1
}
defer x.Quit()
}
cupsConnectTimeout, err := time.ParseDuration(config.CUPSConnectTimeout)
if err != nil {
log.Fatalf("Failed to parse CUPS connect timeout: %s", err)
return 1
}
c, err := cups.NewCUPS(config.CopyPrinterInfoToDisplayName, config.PrefixJobIDToJobTitle,
config.DisplayNamePrefix, config.CUPSPrinterAttributes, config.CUPSMaxConnections,
cupsConnectTimeout)
if err != nil {
log.Fatal(err)
return 1
}
defer c.Quit()
var s *snmp.SNMPManager
if config.SNMPEnable {
log.Info("SNMP enabled")
s, err = snmp.NewSNMPManager(config.SNMPCommunity, config.SNMPMaxConnections)
if err != nil {
log.Error(err)
return 1
}
defer s.Quit()
}
var priv *privet.Privet
if config.LocalPrintingEnable {
if g == nil {
priv, err = privet.NewPrivet(jobs, config.GCPBaseURL, nil)
} else {
priv, err = privet.NewPrivet(jobs, config.GCPBaseURL, g.ProximityToken)
}
if err != nil {
log.Error(err)
return 1
}
defer priv.Quit()
}
cupsPrinterPollInterval, err := time.ParseDuration(config.CUPSPrinterPollInterval)
if err != nil {
log.Fatalf("Failed to parse CUPS printer poll interval: %s", err)
return 1
}
pm, err := manager.NewPrinterManager(c, g, priv, s, cupsPrinterPollInterval,
config.CUPSJobQueueSize, config.CUPSJobFullUsername, config.CUPSIgnoreRawPrinters,
config.ShareScope, jobs, xmppNotifications)
if err != nil {
log.Error(err)
return 1
}
defer pm.Quit()
m, err := monitor.NewMonitor(c, g, priv, pm, config.MonitorSocketFilename)
if err != nil {
log.Error(err)
return 1
}
defer m.Quit()
if config.CloudPrintingEnable {
if config.LocalPrintingEnable {
log.Errorf("Ready to rock as proxy '%s' and in local mode", config.ProxyName)
fmt.Printf("Ready to rock as proxy '%s' and in local mode\n", config.ProxyName)
} else {
log.Errorf("Ready to rock as proxy '%s'", config.ProxyName)
fmt.Printf("Ready to rock as proxy '%s'\n", config.ProxyName)
}
} else {
log.Error("Ready to rock in local-only mode")
fmt.Println("Ready to rock in local-only mode")
}
waitIndefinitely()
log.Error("Shutting down")
fmt.Println("")
fmt.Println("Shutting down")
return 0
}
// handleClientStateChange makes clean transitions as the connection with
// avahi-daemon changes.
//export handleClientStateChange
func handleClientStateChange(client *C.AvahiClient, newState C.AvahiClientState, userdata unsafe.Pointer) {
z := instance
z.spMutex.Lock()
defer z.spMutex.Unlock()
// Name conflict.
if newState == C.AVAHI_CLIENT_S_COLLISION {
log.Warning("Avahi reports a host name collision.")
}
// Transition from not connecting to connecting. Warn in logs.
if newState == C.AVAHI_CLIENT_CONNECTING {
log.Warning("Cannot find Avahi daemon. Is it running?")
}
// Transition from running to not running. Free all groups.
if newState != C.AVAHI_CLIENT_S_RUNNING {
log.Info("Local printing disabled (Avahi client is not running).")
for name, r := range z.printers {
if r.group != nil {
if errstr := C.removeAvahiGroup(z.threadedPoll, r.group); errstr != nil {
err := errors.New(C.GoString(errstr))
log.Errorf("Failed to remove Avahi group: %s", err)
}
r.group = nil
z.printers[name] = r
}
}
}
// Transition from not running to running. Recreate all groups.
if newState == C.AVAHI_CLIENT_S_RUNNING {
log.Info("Local printing enabled (Avahi client is running).")
for name, r := range z.printers {
txt := prepareTXT(r.ty, r.url, r.id, r.online)
defer C.avahi_string_list_free(txt)
if errstr := C.addAvahiGroup(z.threadedPoll, z.client, &r.group, r.name, C.ushort(r.port), txt); errstr != nil {
err := errors.New(C.GoString(errstr))
log.Errorf("Failed to add Avahi group: %s", err)
}
z.printers[name] = r
}
}
// Transition from not failure to failure. Recreate thread poll and client.
if newState == C.AVAHI_CLIENT_FAILURE {
z.restart <- struct{}{}
}
z.state = newState
}
// isXMLErrorClosedConnection simplifies an xml.Decoder error.
//
// If the error is a variation of "connection closed" then logs a suitable error and returns true.
// Otherwise, returns false.
func isXMLErrorClosedConnection(err error) bool {
if strings.Contains(err.Error(), "use of closed network connection") {
log.Info("XMPP connection was closed")
return true
} else if strings.Contains(err.Error(), "connection reset by peer") {
log.Info("XMPP connection was forcibly closed by server")
return true
} else if err == io.EOF {
log.Info("XMPP connection failed")
return true
}
return false
}
func (pm *PrinterManager) syncPrinters(ignorePrivet bool) error {
log.Info("Synchronizing printers, stand by")
// Get current snapshot of CUPS printers.
cupsPrinters, err := pm.cups.GetPrinters()
if err != nil {
return fmt.Errorf("Sync failed while calling GetPrinters(): %s", err)
}
if pm.ignoreRawPrinters {
cupsPrinters, _ = lib.FilterRawPrinters(cupsPrinters)
}
// Augment CUPS printers with extra information from SNMP.
if pm.snmp != nil {
err = pm.snmp.AugmentPrinters(cupsPrinters)
if err != nil {
log.Warningf("Failed to augment printers with SNMP data: %s", err)
}
}
// Set CapsHash on all printers.
for i := range cupsPrinters {
h := adler32.New()
lib.DeepHash(cupsPrinters[i].Tags, h)
cupsPrinters[i].Tags["tagshash"] = fmt.Sprintf("%x", h.Sum(nil))
h = adler32.New()
lib.DeepHash(cupsPrinters[i].Description, h)
cupsPrinters[i].CapsHash = fmt.Sprintf("%x", h.Sum(nil))
}
// Compare the snapshot to what we know currently.
diffs := lib.DiffPrinters(cupsPrinters, pm.printers.GetAll())
if diffs == nil {
log.Infof("Printers are already in sync; there are %d", len(cupsPrinters))
return nil
}
// Update GCP.
ch := make(chan lib.Printer, len(diffs))
for i := range diffs {
go pm.applyDiff(&diffs[i], ch, ignorePrivet)
}
currentPrinters := make([]lib.Printer, 0, len(diffs))
for _ = range diffs {
p := <-ch
if p.Name != "" {
currentPrinters = append(currentPrinters, p)
}
}
// Update what we know.
pm.printers.Refresh(currentPrinters)
log.Infof("Finished synchronizing %d printers", len(currentPrinters))
return nil
}
func (m *Monitor) listen(listener net.Listener) {
ch := make(chan net.Conn)
quitReq := make(chan bool, 1)
quitAck := make(chan bool)
go func() {
for {
conn, err := listener.Accept()
if err != nil {
select {
case <-quitReq:
quitAck <- true
return
}
log.Errorf("Error listening to monitor socket: %s", err)
} else {
ch <- conn
}
}
}()
for {
select {
case conn := <-ch:
log.Info("Received monitor request")
stats, err := m.getStats()
if err != nil {
log.Warningf("Monitor request failed: %s", err)
conn.Write([]byte("error"))
} else {
conn.Write([]byte(stats))
}
conn.Close()
case <-m.listenerQuit:
quitReq <- true
listener.Close()
<-quitAck
m.listenerQuit <- true
return
}
}
}
func (x *internalXMPP) pingPeriodically(timeout, interval time.Duration, dying <-chan struct{}) {
t := time.NewTimer(interval)
defer t.Stop()
for {
select {
case <-t.C:
if success, err := x.ping(timeout); success {
t.Reset(interval)
} else {
log.Info(err)
x.Quit()
}
case <-dying:
// Signal death externally.
x.dead <- struct{}{}
return
}
}
}
func connector(context *cli.Context) int {
config, configFilename, err := lib.GetConfig(context)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to read config file: %s", err)
return 1
}
log.SetLogToConsole(context.Bool("log-to-console"))
logLevel, ok := log.LevelFromString(config.LogLevel)
if !ok {
fmt.Fprintf(os.Stderr, "Log level %s is not recognized", config.LogLevel)
return 1
}
log.SetLevel(logLevel)
if configFilename == "" {
log.Info("No config file was found, so using defaults")
}
log.Info(lib.FullName)
fmt.Println(lib.FullName)
if !config.CloudPrintingEnable && !config.LocalPrintingEnable {
log.Fatal("Cannot run connector with both local_printing_enable and cloud_printing_enable set to false")
return 1
} else if config.LocalPrintingEnable {
log.Fatal("Local printing has not been implemented in this version of the Windows connector.")
return 1
}
jobs := make(chan *lib.Job, 10)
xmppNotifications := make(chan xmpp.PrinterNotification, 5)
var g *gcp.GoogleCloudPrint
var x *xmpp.XMPP
if config.CloudPrintingEnable {
xmppPingTimeout, err := time.ParseDuration(config.XMPPPingTimeout)
if err != nil {
log.Fatalf("Failed to parse xmpp ping timeout: %s", err)
return 1
}
xmppPingInterval, err := time.ParseDuration(config.XMPPPingInterval)
if err != nil {
log.Fatalf("Failed to parse xmpp ping interval default: %s", err)
return 1
}
g, err = gcp.NewGoogleCloudPrint(config.GCPBaseURL, config.RobotRefreshToken,
config.UserRefreshToken, config.ProxyName, config.GCPOAuthClientID,
config.GCPOAuthClientSecret, config.GCPOAuthAuthURL, config.GCPOAuthTokenURL,
config.GCPMaxConcurrentDownloads, jobs)
if err != nil {
log.Fatal(err)
return 1
}
x, err = xmpp.NewXMPP(config.XMPPJID, config.ProxyName, config.XMPPServer, config.XMPPPort,
xmppPingTimeout, xmppPingInterval, g.GetRobotAccessToken, xmppNotifications)
if err != nil {
log.Fatal(err)
return 1
}
defer x.Quit()
}
ws, err := winspool.NewWinSpool(config.PrefixJobIDToJobTitle, config.DisplayNamePrefix, config.PrinterBlacklist)
if err != nil {
log.Fatal(err)
return 1
}
nativePrinterPollInterval, err := time.ParseDuration(config.NativePrinterPollInterval)
if err != nil {
log.Fatalf("Failed to parse printer poll interval: %s", err)
return 1
}
pm, err := manager.NewPrinterManager(ws, g, nil, nil, nativePrinterPollInterval,
config.NativeJobQueueSize, false, false, config.ShareScope, jobs, xmppNotifications)
if err != nil {
log.Fatal(err)
return 1
}
defer pm.Quit()
if config.CloudPrintingEnable {
if config.LocalPrintingEnable {
log.Infof("Ready to rock as proxy '%s' and in local mode", config.ProxyName)
fmt.Printf("Ready to rock as proxy '%s' and in local mode\n", config.ProxyName)
} else {
log.Infof("Ready to rock as proxy '%s'", config.ProxyName)
fmt.Printf("Ready to rock as proxy '%s'\n", config.ProxyName)
}
} else {
log.Info("Ready to rock in local-only mode")
fmt.Println("Ready to rock in local-only mode")
}
waitIndefinitely()
log.Info("Shutting down")
fmt.Println("")
fmt.Println("Shutting down")
return 0
}
