Function w_shuffle_avps

modules/cfgutils/cfgutils.c:886–928

}

static int w_shuffle_avps(struct sip_msg* msg, pv_spec_t *pv_name)
{
	struct usr_avp *src_avp, *rnd_avp;
	struct usr_avp *temp_avp = NULL;
	int_str src_val, rnd_val;
	unsigned short avp_type;
	int avp_name;
	int n, rnd_idx;

	/* get the name */
	if(pv_get_avp_name(msg, &pv_name->pvp, &avp_name, &avp_type)!=0)
	{
		LM_ERR("invalid name\n");
		return -1;
	}

	/* count AVPs */
	n = 0;
	while ((temp_avp=search_first_avp(avp_type, avp_name, NULL, temp_avp)) != 0)
		n++;

	/* randomize AVPs */
	for ( ; n>1; n-- ) {
		rnd_idx = random() % n;
		if (rnd_idx == (n-1))
			continue;

		LM_DBG("swapping [%d] <--> [%d]\n", (n-1), rnd_idx);

		src_avp = search_index_avp(avp_type, avp_name, &src_val, (n-1));
		rnd_avp = search_index_avp(avp_type, avp_name, &rnd_val, rnd_idx);

		if ( replace_avp(avp_type|(rnd_avp->flags&AVP_VAL_STR), avp_name, rnd_val, (n-1))==-1 ||
					replace_avp(avp_type|(src_avp->flags&AVP_VAL_STR), avp_name, src_val, rnd_idx)==-1 ) {
			LM_ERR("failed to swap avp\n");
			goto error;
		}
	}

	return 1;
error:
	return -1;
}