/
client.go
48 lines (43 loc) · 838 Bytes
/
client.go
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package main
import (
"encoding/binary"
"fmt"
"net"
"os"
"strconv"
)
func hello(conn net.Conn, name string) {
payload := []byte(name)
pkg := make([]byte, 4+len(payload))
binary.BigEndian.PutUint32(pkg[:4], uint32(len(pkg)))
copy(pkg[4:], payload)
conn.Write(pkg)
buf := make([]byte, 1024*4)
n, err := conn.Read(buf)
if err != nil {
fmt.Println(err)
return
}
fmt.Println(string(buf[4:n]))
}
func main() {
name := "Bob"
if len(os.Args) == 2 {
name = os.Args[1]
}
addr, err := net.ResolveUDPAddr("udp", "localhost:3333")
if err != nil {
fmt.Println("Can't resolve address: ", err)
os.Exit(1)
}
conn, err := net.DialUDP("udp", nil, addr)
if err != nil {
fmt.Println("Can't dial: ", err)
os.Exit(1)
}
defer conn.Close()
for i := 0; i < 5; i++ {
hello(conn, name+strconv.Itoa(i))
}
os.Exit(0)
}