| 40 | } |
| 41 | |
| 42 | func processudp(c net.PacketConn, uwg *sync.WaitGroup) { |
| 43 | defer uwg.Done() |
| 44 | |
| 45 | packet := make([]byte, mtu) |
| 46 | for { |
| 47 | n, raddr, err := c.ReadFrom(packet) |
| 48 | |
| 49 | if err != nil { |
| 50 | fmt.Println("err accepting udp packets") |
| 51 | if errors.Is(err, net.ErrClosed) { |
| 52 | log.Print(err) |
| 53 | return |
| 54 | } |
| 55 | continue |
| 56 | } |
| 57 | |
| 58 | log.Printf("umsg: %d - %s / by: %s\n", n, string(packet[:n]), raddr.String()) |
| 59 | // echo packet and raddr back |
| 60 | c.WriteTo(packet[:n], raddr) |
| 61 | c.WriteTo([]byte(raddr.String()), raddr) |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | func EchoTCP(tcp net.Listener, wg *sync.WaitGroup) { |
| 66 | defer wg.Done() |