Sending C array over gob ; decoding shows wrong data

[kanikak...@gmail.com]

I am sending a C structure which looks like this

typdef struct 

{

 unsigned char field1;

 unsigned char field2;

 unsigned char array[10];

}complete_data_t;

I am encoding this data using GOB and sending as UDP broadcast in a very small network. On the receiver side, all fields are correctly getting parsed but all array elements are coming as zero. I am populating these array elements with a non-zero value at the transmitter side.

var data C.complete_data_t

Transmitter side:

var buffer bytes.Buffer

err := gob.NewEncoder(&buffer).Encode(&data)

  _,err = conn.Write(buffer.Bytes())

buffer.Reset()

Receiver side:

rx_buf := make([]byte, 1024)

length,addr,err := conn.ReadFrom(rx_buf)

buffer := bytes.NewBuffer(rx_buf[:length])

err = gob.NewDecoder(buffer).Decode(&data)

  

[Tamás Gulácsi]

Use a Go struct for GOB encoding/decoding.

[Bryan Mills]

Per https://golang.org/pkg/encoding/gob/, “Structs encode and decode only exported fields.”

The fields of your C struct are unexported in Go, since they start with lower-case letters.

If the gob package is encoding or decoding the non-array fields of the struct, *that* is the bug.