// Process ZMQ 4.0.x monitor messages
// http://api.zeromq.org/4-0:zmq-socket-monitor
func (t *TransportZmq) processMonitorIn() (ok bool) {
for {
// Bring in the messages
RetryRecv:
data, err := t.monitor.Recv(zmq.DONTWAIT)
if err != nil {
switch err {
case syscall.EINTR:
// Try again
goto RetryRecv
case syscall.EAGAIN:
// No more messages
ok = true
return
}
// Failure
t.recv_chan <- fmt.Errorf("Monitor zmq.Socket.Recv failure %s", err)
return
}
switch t.event.part {
case Monitor_Part_Header:
t.event.event = zmq.Event(binary.LittleEndian.Uint16(data[0:2]))
t.event.val = int32(binary.LittleEndian.Uint32(data[2:6]))
t.event.data = ""
case Monitor_Part_Data:
t.event.data = string(data)
t.event.Log()
default:
log.Debug("Extraneous data in monitor message. Silently discarding.")
continue
}
more, err := t.monitor.RcvMore()
if err != nil {
// Failure
t.recv_chan <- fmt.Errorf("Monitor zmq.Socket.RcvMore failure %s", err)
return
}
if !more {
if t.event.part < Monitor_Part_Data {
t.event.Log()
log.Debug("Unexpected end of monitor message. Skipping.")
}
t.event.part = Monitor_Part_Header
continue
}
if t.event.part <= Monitor_Part_Data {
t.event.part++
}
}
}
// Process ZMQ 3.2.x monitor messages
// http://api.zeromq.org/3-2:zmq-socket-monitor
func (t *TransportZmq) processMonitorIn() (ok bool) {
for {
// Bring in the messages
RetryRecv:
data, err := t.monitor.Recv(zmq.DONTWAIT)
if err != nil {
switch err {
case syscall.EINTR:
// Try again
goto RetryRecv
case syscall.EAGAIN:
// No more messages
ok = true
return
}
// Failure
t.recv_chan <- fmt.Errorf("Monitor zmq.Socket.Recv failure %s", err)
return
}
switch t.event.part {
case Monitor_Part_Header:
event := (*C.struct_zmq_event_t_wrap)(unsafe.Pointer(&data[0]))
t.event.event = zmq.Event(event.event)
if event.addr == nil {
t.event.data = ""
} else {
// TODO: Fix this - data has been feed by zmq_msg_close!
//t.event.data = C.GoString(event.addr)
t.event.data = ""
}
t.event.val = int32(event.fd)
t.event.Log()
default:
log.Debug("Extraneous data in monitor message. Silently discarding.")
continue
}
more, err := t.monitor.RcvMore()
if err != nil {
// Failure
t.recv_chan <- fmt.Errorf("Monitor zmq.Socket.RcvMore failure %s", err)
return
}
if !more {
t.event.part = Monitor_Part_Header
continue
}
if t.event.part <= Monitor_Part_Data {
t.event.part++
}
}
}