Function nat64lsn_foreach

tools/ipfw/nat64lsn.c:855–894

* Retrieves nat64lsn instance list from kernel, * optionally sorts it and calls requested function for each instance. * * Request: [ ipfw_obj_lheader ] * Reply: [ ipfw_obj_lheader ipfw_nat64lsn_cfg x N ] */

 * Reply: [ ipfw_obj_lheader ipfw_nat64lsn_cfg x N ]
 */
static int
nat64lsn_foreach(nat64lsn_cb_t *f, const char *name, uint8_t set,  int sort)
{
	ipfw_obj_lheader *olh;
	ipfw_nat64lsn_cfg *cfg;
	size_t sz;
	uint32_t i;
	int error;

	/* Start with reasonable default */
	sz = sizeof(*olh) + 16 * sizeof(ipfw_nat64lsn_cfg);

	for (;;) {
		if ((olh = calloc(1, sz)) == NULL)
			return (ENOMEM);

		olh->size = sz;
		if (do_get3(IP_FW_NAT64LSN_LIST, &olh->opheader, &sz) != 0) {
			sz = olh->size;
			free(olh);
			if (errno != ENOMEM)
				return (errno);
			continue;
		}

		if (sort != 0)
			qsort(olh + 1, olh->count, olh->objsize,
			    nat64name_cmp);

		cfg = (ipfw_nat64lsn_cfg *)(olh + 1);
		for (i = 0; i < olh->count; i++) {
			error = f(cfg, name, set); /* Ignore errors for now */
			cfg = (ipfw_nat64lsn_cfg *)((caddr_t)cfg +
			    olh->objsize);
		}
		free(olh);
		break;
	}
	return (0);
}