#define IF_PREFIX_ONLINK 0x01
#define IF_PREFIX_AUTOCONF 0x02
-int print_prefix(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
+int print_prefix(struct nlmsghdr *n, void *arg)
{
FILE *fp = (FILE *)arg;
struct prefixmsg *prefix = NLMSG_DATA(n);