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main.go
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main.go
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package main
import (
"context"
"crypto/rand"
"crypto/tls"
"flag"
"fmt"
"io"
"log"
"net"
"sync/atomic"
"time"
)
var upload, download int64
func formatSpeed(v float64) string {
return fmt.Sprintf("%.2fkb/s", v/1024)
}
func main() {
addr := flag.String("addr", ":5555", "address to use")
cert := flag.String("cert", "./bin/certs/rando.test/cert.pem", "tls cert")
key := flag.String("key", "./bin/certs/rando.test/key.pem", "tls key")
duration := flag.Duration("duration", 2*time.Second, "total time of running the client")
flag.Parse()
client(*addr, *cert, *key, *duration)
upspeed := float64(upload) / duration.Seconds()
downspeed := float64(download) / duration.Seconds()
log.Printf("down => %v upload => %s", formatSpeed(downspeed), formatSpeed(upspeed))
}
func client(addr, cert, key string, timeout time.Duration) {
ctx, cancel := context.WithTimeout(context.Background(), timeout)
defer cancel()
x, err := tls.LoadX509KeyPair(cert, key)
if err != nil {
log.Fatal("Failed to load certs", err)
}
config := tls.Config{
ServerName: "rando.test",
Certificates: []tls.Certificate{x},
}
go func() {
ls, err := tls.Dial("tcp", ":5555", &config)
if err != nil {
log.Fatal(err)
}
defer ls.Close()
go func() {
<-ctx.Done()
ls.Close()
}()
_, err = io.Copy(w{func(i int) {
atomic.AddInt64(&download, int64(i))
}}, ls)
if err != nil {
log.Fatal(err)
}
}()
go func() {
ls, err := net.Dial("tcp", ":5555")
if err != nil {
log.Fatal(err)
}
defer ls.Close()
go func() {
<-ctx.Done()
ls.Close()
}()
_, err = io.Copy(u{
fn: func(i int) {
atomic.AddInt64(&upload, int64(i))
},
w: ls,
}, rand.Reader)
if err != nil {
log.Fatal(err)
}
}()
<-ctx.Done()
}
type w struct {
fn func(int)
}
func (w w) Write(b []byte) (int, error) {
w.fn(len(b))
return len(b), nil
}
type u struct {
fn func(int)
w io.Writer
}
func (u u) Write(b []byte) (int, error) {
n, err := u.w.Write(b)
u.fn(n)
return n, err
}