Function rte_lpm6_add

dpdk/lib/lpm/rte_lpm6.c:851–902

* Add a route */

 * Add a route
 */
int
rte_lpm6_add(struct rte_lpm6 *lpm, const uint8_t *ip, uint8_t depth,
	     uint32_t next_hop)
{
	struct rte_lpm6_tbl_entry *tbl;
	struct rte_lpm6_tbl_entry *tbl_next = NULL;
	/* init to avoid compiler warning */
	uint32_t tbl_next_num = 123456;
	int status;
	uint8_t masked_ip[RTE_LPM6_IPV6_ADDR_SIZE];
	int i;

	/* Check user arguments. */
	if ((lpm == NULL) || (depth < 1) || (depth > RTE_LPM6_MAX_DEPTH))
		return -EINVAL;

	/* Copy the IP and mask it to avoid modifying user's input data. */
	ip6_copy_addr(masked_ip, ip);
	ip6_mask_addr(masked_ip, depth);

	/* Simulate adding a new route */
	int ret = simulate_add(lpm, masked_ip, depth);
	if (ret < 0)
		return ret;

	/* Add the rule to the rule table. */
	int is_new_rule = rule_add(lpm, masked_ip, depth, next_hop);
	/* If there is no space available for new rule return error. */
	if (is_new_rule < 0)
		return is_new_rule;

	/* Inspect the first three bytes through tbl24 on the first step. */
	tbl = lpm->tbl24;
	status = add_step(lpm, tbl, TBL24_IND, &tbl_next, &tbl_next_num,
		masked_ip, ADD_FIRST_BYTE, 1, depth, next_hop,
		is_new_rule);
	assert(status >= 0);

	/*
	 * Inspect one by one the rest of the bytes until
	 * the process is completed.
	 */
	for (i = ADD_FIRST_BYTE; i < RTE_LPM6_IPV6_ADDR_SIZE && status == 1; i++) {
		tbl = tbl_next;
		status = add_step(lpm, tbl, tbl_next_num, &tbl_next,
			&tbl_next_num, masked_ip, 1, (uint8_t)(i + 1),
			depth, next_hop, is_new_rule);
		assert(status >= 0);
	}

	return status;
}

/*
 * Takes a pointer to a table entry and inspect one level.