Thread: Rpc linux c, dynamic array

Hello,

I'm writing an RPC C program in LInux and i want to pass dynamically allocated arrays, but only the first element of the arrays is reachable at the server side.

Code:

struct data {
	int size;
	int *X;
	int *Y;
	float r;
};

struct myarray {
    float pin<2>;
};

struct dianisma {
	int size;
	float *X;
};

program ASKISI_PROG {
		version ASKISI_VERS {
			int ESOTERIKO_GINOMENO(data) = 1;
			myarray MESI_TIMI(data) = 2;
			dianisma GINOMENO(data) = 3;
	    } = 1;
} = 0x23451111;

Let's focus on ESOTERIKO_GINOMENO function. Two dynamically allocated arrays should be passed to the server, but only the first element of both arrays is passed.

xdr file:

Code:

bool_t
xdr_data (XDR *xdrs, data *objp)
{
	register int32_t *buf;

	 if (!xdr_int (xdrs, &objp->size))
		 return FALSE;
	 if (!xdr_pointer (xdrs, (char **)&objp->X, sizeof (int), (xdrproc_t) xdr_int))
		 return FALSE;
	 if (!xdr_pointer (xdrs, (char **)&objp->Y, sizeof (int), (xdrproc_t) xdr_int))
		 return FALSE;
	 if (!xdr_float (xdrs, &objp->r))
		 return FALSE;
	return TRUE;
}

bool_t
xdr_myarray (XDR *xdrs, myarray *objp)
{
	register int32_t *buf;

	 if (!xdr_array (xdrs, (char **)&objp->pin.pin_val, (u_int *) &objp->pin.pin_len, 2,
		sizeof (float), (xdrproc_t) xdr_float))
		 return FALSE;
	return TRUE;
}

bool_t
xdr_dianisma (XDR *xdrs, dianisma *objp)
{
	register int32_t *buf;

	 if (!xdr_int (xdrs, &objp->size))
		 return FALSE;
	 if (!xdr_pointer (xdrs, (char **)&objp->X, sizeof (float), (xdrproc_t) xdr_float))
		 return FALSE;
	return TRUE;
}

client usage snippet:

Code:

    scanf("%d", &size);
    data_1_arg.X= (int *) malloc(size*sizeof(int));
    data_1_arg.Y= (int *) malloc(size*sizeof(int));


    // .... 
    
    result_1 = esoteriko_ginomeno_1(&data_1_arg, clnt);

Server Side:

Code:

int * esoteriko_ginomeno_1_svc(data *argp, struct svc_req *rqstp)
{
    int i;
	static int result;

	result = 0;

    for(i=0; i<argp->size; i++) {
        printf("%d ", argp->X[i]);
    }
    puts("");
    for(i=0; i<argp->size; i++) {
        printf("%d ", argp->Y[i]);
    }
    puts("");

    for(i=0; i<argp->size; i++) {
        
        result = result + ( argp->X[i] * argp->Y[i] );
    }

	return &result;
}

Any idea ?
Thanks in advanced.