package main import ( "net" "reflect" "fmt" "os" ) func main() { listener, _ := net.Listen("tcp", ":8000") for { c , _ := listener.Accept() go connHandler(c) } } func connHandler(c net.Conn) { defer c.Close() e := reflect.TypeOf(c).Elem() n := e.NumField() for i := 0 ; i < n; i++ { fmt.Fprintf(os.Stdout, "e.Field(%d) = %v %v\n", i, e.Field(i).Name, e.Field(i)) } fmt.Fprintf(os.Stdout, "====================\n") v := reflect.ValueOf(c) fmt.Fprintf(os.Stdout, "reflect.ValueOf(c) %v\n", v) v = v.Elem() fmt.Fprintf(os.Stdout, "reflect.ValueOf(c).Elem() %v\n", v) fmt.Fprintf(os.Stdout, "====================\n") for i := 0; i < v.NumField(); i++ { fmt.Fprintf(os.Stdout, "v.Field(%d) = %v %v\n", i, v.Field(i), v.Field(i).Type()) switch v.Field(i).Type().Kind(){ case reflect.Int: fmt.Fprintf(os.Stdout, "%d\n", v.Field(i).Int()) } } fmt.Fprintf(os.Stdout, "====================\n") fmt.Fprintf(os.Stdout, "reflect.ValueOf(c).Elem().FieldByName(\"fd\") %v\n", v.FieldByName("fd")) fmt.Fprintf(os.Stdout, "reflect.ValueOf(c).Elem().FieldByName(\"fd\").Elem() %v\n", reflect.ValueOf(c).Elem().FieldByName("fd").Elem()) v = reflect.ValueOf(c).Elem().FieldByName("fd").Elem() fmt.Fprintf(os.Stdout, "====================\n") for i := 0; i < v.NumField(); i++ { fmt.Fprintf(os.Stdout, "v.Field(%d) = %v %v %s\n", i, v.Field(i), v.Field(i).Type(), v.Field(i).String()) switch v.Field(i).Type().Kind(){ case reflect.Int: fmt.Fprintf(os.Stdout, "%d\n", v.Field(i).Int()) } } fmt.Fprintf(os.Stdout, "====================\n") sysfd := v.FieldByName("sysfd") fmt.Fprintf(os.Stdout, "v.FieldByName(\"sysfd\") = %v\n", sysfd) fd := uintptr(sysfd.Int()) fmt.Fprintf(os.Stdout, "fd %v\n", fd) f := os.NewFile(fd, "listen socket") fmt.Fprintf(os.Stdout, "f = %v\n", f) conn, err := net.FileConn(f) if err != nil { fmt.Fprintf(os.Stdout, "err %v\n", err.Error()) return } fmt.Fprintf(os.Stdout, "c %v\n", conn) conn.Write([]byte("hello world ~!\n")) }
[vicky@localhost ~]$ telnet 192.168.1.98 8000
Trying 192.168.1.98...
Connected to 192.168.1.98.
Escape character is '^]'.
hello world ~!
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