Structure not returned to client using thrift c_glib client

I am trying to implement client/ server program in c (c_glib) using thrift.

I have implemented the client/ server passing variables as function arguments. Now I need to pass structure as function argument.

The thrift file am using is given below

#!/usr/local/bin/thrift --gen c_glib


struct packet {
        1: i32 header,
        2: i32 data
}

service Calculator {
        void ping(),
        i32 calculate(1:i32 id, 2:i32 num),
        void stop_transfer(),
        void set_packet(1:packet pac_data)

}

The steps which I followed for passing the structure is :

• In client side
  1. g_object_new(TYPE_PACKET, NULL)
  2. Pass the pointer of structure to the server. calculator_if_set_packet (client, trans_packet, &error)
  3. g_object_get(tans_packet, "header", &head, "data", &dat, NULL) to get the data set in server
  4. Print the structure to show that the data set in server is reflected back in client
  

The client side relevant code is given below

int main (void) 
{
    gint head;
    gint dat;

    packet *trans_packet;

    trans_packet = g_object_new (TYPE_PACKET, NULL);

    if(!error && calculator_if_set_packet (client, trans_packet, &error)) {
        g_object_get((packet *) trans_packet,
             "header", &head,
             "data", &dat,
             NULL);

        printf("struct->header : %d\n", head);
        printf("struct->data : %d\n", dat);
    }

    g_object_unref (trans_packet);

}

• In server side
  1. g_object_get(pac_data, "header", &header, "data", &data, NULL) to get the properties of pac_data
  2. g_object_setg_object_get(tans_packet, "header", 111, "data", 999, NULL)
  

The server side function is given below

static gboolean 
tutorial_calculator_handler_set_packet(CalculatorIf *iface,
                                  const packet * pac_data,
                                  GError **error)
{
    gint header;
    gint data;

    THRIFT_UNSED_VAR (iface);
    THRIFT_UNUSED_VAR (error);

    g_object_get((packet *) pac_data,
             "header", &header,
             "data", &data,
             NULL);

    g_object_set((packet *) pac_data,
             "header", 123,
             "data", 999,
             NULL);

    return TRUE;
}

When am doing this, the server is not returning anything to the client when am calling calculator_if_set_packet().

Can anyone help me on this?

I could find the solution for the above problem.

I changed the thrift file as follows :

#!/usr/local/bin/thrift --gen c_glib

struct packet {
    1: i32 header,
    2: i32 data
}

service Calculator {
    void ping(),
    i32 calculate(1:i32 id, 2:i32 num),
    void stop_transfer(),
    packet set_packet(1:packet pac_data)
}

The corresponding modification in client and server part as given below :

In client part

int main (void) 
{
    gint head;
    gint dat;

    packet *trans_packet;
    packet *ret_packet;

    trans_packet = g_object_new (TYPE_PACKET, NULL);
    ret_packet = g_object_new (TYPE_PACKET, NULL);

    if(!error && calculator_if_set_packet (client, &ret_packet, trans_packet, &error)) {
        g_object_get((packet *) ret_packet,
             "header", &head,
             "data", &dat,
             NULL);

        printf("struct->header : %d\n", head);
        printf("struct->data : %d\n", dat);
    }

    g_object_unref (trans_packet);
    g_object_unref (ret_packet);
}

In server part

static gboolean 
tutorial_calculator_handler_set_packet(CalculatorIf *iface,
                              packet ** _return,
                              const packet * pac_data,
                              GError **error)
{
    gint header;
    gint data;

    THRIFT_UNSED_VAR (iface);
    THRIFT_UNUSED_VAR (error);

    g_object_get((packet *) pac_data,
             "header", &header,
             "data", &data,
             NULL);

    g_object_set(*_return,
             "header", 123,
             "data", 999,
             NULL);

    return TRUE;
}

Now whatever I set in the server am getting that in client.

If there is any other solution, do update the answer.