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sender.go
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sender.go
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package main
import (
"bufio"
"encoding/json"
"flag"
"fmt"
ocore "github.com/ossrs/go-oryx-lib/logger"
"io"
"net"
"os"
"time"
)
type MsgType uint8
const (
MsgTypeRaw MsgType = iota
MsgTypeReport
MsgTypeUnknown
)
func (v MsgType) String() string {
switch v {
case MsgTypeRaw:
return "Raw"
case MsgTypeReport:
return "Report"
default:
return "Unknown"
}
}
type Msg struct {
Id uint32 `json:"id"`
Timestamp uint64 `json:"ts"`
Diff int32 `json:"diff"`
Interval uint32 `json:"interval"`
Size uint32 `json:"size"`
Type MsgType `json:"type"`
Data string `json:"data"`
}
type Metric struct {
Starttime int64 `json:"start"`
Duration int32 `json:"duration"` // in ms.
DropFrames int32 `json:"drop"`
Latency int32 `json:"latency"`
JumpFrames int32 `json:"jump"`
}
func fill_string(size int) (str string) {
for len(str) < size {
str += "F"
}
return
}
func create_raw_message(interval, size int, id uint32, prets uint64) (uint32, uint64, *Msg, []byte, error) {
msg := &Msg{
Id: id,
Timestamp: uint64(time.Now().UnixNano()),
Diff: 0,
Interval: uint32(interval),
Size: uint32(size),
Data: "",
}
id++
if prets != 0 {
msg.Diff = (int32)(msg.Timestamp-prets)/1000/1000 - int32(interval)
}
prets = msg.Timestamp
var err error
var buf []byte
for {
if buf, err = json.Marshal(msg); err != nil {
return id, prets, msg, buf, err
}
if len(buf) == size {
break
}
psize := size - len(buf)
//ocore.Trace.Println(nil, "resize", len(buf), "to", size, psize)
msg.Data = fill_string(psize)
}
return id, prets, msg, buf, nil
}
func serve_msgs(c io.ReadWriter, interval, size int, report uint32, fn func(), ef func(error) error) (err error) {
br := bufio.NewReader(c)
d := json.NewDecoder(br)
var id uint32
var prets uint64
for {
var msg *Msg
var buf []byte
if id, prets, msg, buf, err = create_raw_message(interval, size, id, prets); err != nil {
return
}
if _, err = c.Write(buf); err != nil {
return
}
ocore.Info.Println(nil, "send", len(buf), "bytes",
fmt.Sprintf("%v/%v/%v", msg.Id, msg.Timestamp, msg.Diff),
fmt.Sprintf("%v/%v/%v", msg.Type, msg.Interval, msg.Size))
// requires report every some messages.
for (id % report) == 0 {
msg.Type = MsgTypeReport
msg.Data = ""
if buf, err = json.Marshal(msg); err != nil {
return
}
if _, err = c.Write(buf); err != nil {
return
}
if fn != nil {
fn()
}
if err = d.Decode(msg); err != nil {
if ef != nil {
if err = ef(err); err == nil {
continue
}
}
return
}
m := &Metric{}
if err = json.Unmarshal([]byte(msg.Data), m); err != nil {
return
}
fmt.Fprintln(os.Stderr, fmt.Sprintf("Report start:%v duration:%v total:%v drop:%v latency:%v",
m.Starttime/1000/1000, m.Duration, msg.Id, m.DropFrames, m.Latency))
break
}
time.Sleep(time.Millisecond * time.Duration(interval))
}
}
func serve_send(host, transport string, port, interval, size int, report uint32) (err error) {
if transport == "tcp" {
var addr *net.TCPAddr
if addr, err = net.ResolveTCPAddr("tcp", fmt.Sprintf("%v:%v", host, port)); err != nil {
return
}
var c *net.TCPConn
if c, err = net.DialTCP("tcp", nil, addr); err != nil {
return
}
ocore.Trace.Println(nil, "connected at", c.RemoteAddr())
c.SetNoDelay(true)
return serve_msgs(c, interval, size, report, nil, nil)
}
if transport == "udp" {
var laddr *net.UDPAddr
if laddr, err = net.ResolveUDPAddr("udp", ":0"); err != nil {
return
}
var raddr *net.UDPAddr
if raddr, err = net.ResolveUDPAddr("udp", fmt.Sprintf("%v:%v", host, port)); err != nil {
return
}
// we can use the:
// DialUDP, then read and write the udp connection.
// ListenUDP, then use read from and write to remote addr.
var c *net.UDPConn
if c, err = net.DialUDP("udp", laddr, raddr); err != nil {
return
}
ocore.Trace.Println(nil, "connected at", c.RemoteAddr())
return serve_msgs(c, interval, size, report, func() {
// udp maybe drop packets, which cause the timeout.
c.SetReadDeadline(time.Now().Add(1 * time.Second))
}, func(err error) error {
if ne, ok := err.(net.Error); ok && ne.Timeout() {
ocore.Warn.Println(nil, "ignore timeout for read report.")
return nil
}
return err
})
}
return
}
func main() {
var host, transport string
var port, interval, size, report int
flag.StringVar(&transport, "transport", "tcp", "the underlayer transport")
flag.StringVar(&host, "host", "127.0.0.1", "the host to send to")
flag.IntVar(&size, "size", 188, "the size of each packet data")
flag.IntVar(&report, "report", 100, "report when got these packets")
flag.IntVar(&interval, "interval", 300, "the ms of send interval")
flag.IntVar(&port, "port", 0, "the transport port to bind")
flag.Usage = func() {
fmt.Fprintln(os.Stderr, fmt.Sprintf("Usage: %s <--host=string> <--port=int> <--transport=tcp|udp> <--interval=uint> <--size=int> <--report=uint>", os.Args[0]))
fmt.Fprintln(os.Stderr, " host, the host to send to.")
fmt.Fprintln(os.Stderr, " port, the transport port to bind.")
fmt.Fprintln(os.Stderr, " transport, the underlayer transport, tcp or udp.")
fmt.Fprintln(os.Stderr, " interval, the ms of send interval.")
fmt.Fprintln(os.Stderr, " size, the size of each packet data.")
fmt.Fprintln(os.Stderr, " report, report when got these packets.")
fmt.Fprintln(os.Stderr, "For example:")
fmt.Fprintln(os.Stderr, fmt.Sprintf(" %s --host=127.0.0.1 --port=1935 --transport=tcp", os.Args[0]))
fmt.Fprintln(os.Stderr, fmt.Sprintf(" %s --host=127.0.0.1 --port=1935 --transport=udp", os.Args[0]))
fmt.Fprintln(os.Stderr, fmt.Sprintf(" %s --host=127.0.0.1 --port=1935 --transport=tcp --interval=30 --size=188 --report=100", os.Args[0]))
fmt.Fprintln(os.Stderr, fmt.Sprintf(" %s --host=127.0.0.1 --port=1935 --transport=udp --interval=30 --size=188 --report=100", os.Args[0]))
}
flag.Parse()
if port <= 0 {
flag.Usage()
os.Exit(1)
}
ocore.Trace.Println(nil, fmt.Sprintf("sender over %v://%v:%v %v/%v/%v.", transport, host, port, interval, size, report))
var err error
if err = serve_send(host, transport, port, interval, size, uint32(report)); err != nil {
ocore.Error.Println(nil, "serve failed. err is", err)
os.Exit(1)
}
}