func (rcv *TCP) handleConnection(conn net.Conn) {
atomic.AddInt32(&rcv.active, 1)
defer atomic.AddInt32(&rcv.active, -1)
defer conn.Close()
reader := bufio.NewReader(conn)
for {
conn.SetReadDeadline(time.Now().Add(2 * time.Minute))
line, err := reader.ReadBytes('\n')
if err != nil {
if err == io.EOF {
if len(line) > 0 {
logrus.Warningf("[tcp] Unfinished line: %#v", line)
}
} else {
atomic.AddUint32(&rcv.errors, 1)
logrus.Error(err)
}
break
}
if len(line) > 0 { // skip empty lines
if msg, err := points.ParseText(string(line)); err != nil {
atomic.AddUint32(&rcv.errors, 1)
logrus.Info(err)
} else {
atomic.AddUint32(&rcv.metricsReceived, 1)
rcv.out <- msg
}
}
}
}
// Listen bind port. Receive messages and send to out channel
func (rcv *UDP) Listen(addr *net.UDPAddr) error {
var err error
rcv.conn, err = net.ListenUDP("udp", addr)
if err != nil {
return err
}
go func() {
ticker := time.NewTicker(rcv.metricInterval)
defer ticker.Stop()
for {
select {
case <-ticker.C:
metricsReceived := atomic.LoadUint32(&rcv.metricsReceived)
atomic.AddUint32(&rcv.metricsReceived, -metricsReceived)
rcv.Stat("udp.metricsReceived", float64(metricsReceived))
incompleteReceived := atomic.LoadUint32(&rcv.incompleteReceived)
atomic.AddUint32(&rcv.incompleteReceived, -incompleteReceived)
rcv.Stat("udp.incompleteReceived", float64(incompleteReceived))
errors := atomic.LoadUint32(&rcv.errors)
atomic.AddUint32(&rcv.errors, -errors)
rcv.Stat("udp.errors", float64(errors))
logrus.WithFields(logrus.Fields{
"metricsReceived": int(metricsReceived),
"incompleteReceived": int(incompleteReceived),
"errors": int(errors),
}).Info("[udp] doCheckpoint()")
case <-rcv.exit:
rcv.conn.Close()
return
}
}
}()
go func() {
defer rcv.conn.Close()
var buf [2048]byte
var data *bytes.Buffer
lines := newIncompleteStorage()
for {
rlen, peer, err := rcv.conn.ReadFromUDP(buf[:])
if err != nil {
if strings.Contains(err.Error(), "use of closed network connection") {
break
}
atomic.AddUint32(&rcv.errors, 1)
logrus.Error(err)
continue
}
prev := lines.pop(peer.String())
if prev != nil {
data = bytes.NewBuffer(prev)
data.Write(buf[:rlen])
} else {
data = bytes.NewBuffer(buf[:rlen])
}
for {
line, err := data.ReadBytes('\n')
if err != nil {
if err == io.EOF {
if len(line) > 0 { // incomplete line received
if rcv.logIncomplete {
logIncomplete(peer, buf[:rlen], line)
}
lines.store(peer.String(), line)
atomic.AddUint32(&rcv.incompleteReceived, 1)
}
} else {
atomic.AddUint32(&rcv.errors, 1)
logrus.Error(err)
}
break
}
if len(line) > 0 { // skip empty lines
if msg, err := points.ParseText(string(line)); err != nil {
atomic.AddUint32(&rcv.errors, 1)
logrus.Info(err)
} else {
atomic.AddUint32(&rcv.metricsReceived, 1)
rcv.out <- msg
}
}
}
}
close(rcv.finished)
}()
return nil
}
func (rcv *UDP) receiveWorker(exit chan bool) {
defer rcv.conn.Close()
var buf [65535]byte
var data *bytes.Buffer
lines := newIncompleteStorage()
for {
rlen, peer, err := rcv.conn.ReadFromUDP(buf[:])
if err != nil {
if strings.Contains(err.Error(), "use of closed network connection") {
break
}
atomic.AddUint32(&rcv.errors, 1)
logrus.Error(err)
continue
}
prev := lines.pop(peer.String())
if prev != nil {
data = bytes.NewBuffer(prev)
data.Write(buf[:rlen])
} else {
data = bytes.NewBuffer(buf[:rlen])
}
for {
line, err := data.ReadBytes('\n')
if err != nil {
if err == io.EOF {
if len(line) > 0 { // incomplete line received
if rcv.logIncomplete {
logIncomplete(peer, buf[:rlen], line)
}
lines.store(peer.String(), line)
atomic.AddUint32(&rcv.incompleteReceived, 1)
}
} else {
atomic.AddUint32(&rcv.errors, 1)
logrus.Error(err)
}
break
}
if len(line) > 0 { // skip empty lines
if msg, err := points.ParseText(string(line)); err != nil {
atomic.AddUint32(&rcv.errors, 1)
logrus.Info(err)
} else {
atomic.AddUint32(&rcv.metricsReceived, 1)
rcv.out <- msg
}
}
}
}
}
