Integrating existing C code to Go. Convert unsigned char poiner result to []byte

Integrating existing C code to Go. Convert unsigned char poiner result to
[]byte

Here is a simple example:
package main
//#include <stdio.h>
//#include <strings.h>
//#include <stdlib.h>
/*
typedef struct {
unsigned char *data;
unsigned int data_len;
} Result;
Result *foo() {
Result *r = malloc(sizeof(Result));
r->data = (unsigned char *)malloc(10);
r->data_len = 10;
memset(r->data, 0, 10);
r->data = (unsigned char *)strdup("xxx123");
r->data_len = 6;
return r;
}
*/
import "C"
import (
"fmt"
// "unsafe"
)
func main() {
result := C.foo()
fmt.Printf("%v, %v, %v\n", result.data, string(*(result.data)),
result.data_len)
}
As a result i've got something like this
0x203970, x, 6
pointer to data, first character of data and the size. But how can i get
the actual data value, preferably as a []byte type to use it in go code?
In other words - how to convert unsigned char * to []byte?