Created
March 10, 2019 09:10
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server
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package main | |
import ( | |
"log" | |
"math/rand" | |
"net" | |
"strings" | |
"time" | |
) | |
func handleMsg(buf []byte) (seqNum, t string) { | |
s := strings.Fields(string(buf)) | |
seqNum = s[1] | |
t = s[2] | |
return | |
} | |
// Server launch the server | |
func Server() { | |
addr, err := net.ResolveUDPAddr("udp", "localhost:8000") | |
if err != nil { | |
panic("地址转换出错") | |
} | |
s, err := net.ListenUDP("udp", addr) | |
defer s.Close() | |
if err != nil { | |
panic("创建套接字失败") | |
} | |
for { | |
// Generate random number in the range of 0 to 9(include) | |
randNum := rand.Intn(10) | |
buf := make([]byte, 1024) | |
_, cc, err := s.ReadFromUDP(buf) | |
if err != nil { | |
panic(err) | |
} | |
if randNum < 4 { | |
log.Printf("此udp包被丢弃...") | |
continue | |
} | |
go func(cc *net.UDPAddr) { | |
seqNum, t := handleMsg(buf) | |
log.Printf("addr:%s|seqNum:%s|sendTime:%s", cc.String(), seqNum, t) | |
// time.Sleep(time.Millisecond * time.Duration(rand.Intn(20))) | |
_, err := s.WriteToUDP([]byte("receive successfuly"), cc) | |
if err != nil { | |
panic(err) | |
} | |
}(cc) | |
} | |
} | |
func main() { | |
Server() | |
} |
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