Function mlx5_flow_validate_item_tcp

dpdk/drivers/net/mlx5/mlx5_flow.c:3135–3174

* Validate TCP item. * * @param[in] item * Item specification. * @param[in] item_flags * Bit-fields that holds the items detected until now. * @param[in] target_protocol * The next protocol in the previous item. * @param[out] error * Pointer to error structure. * * @return * 0 on success, a negative errno value otherwise and rte_errno is set. */

 *   0 on success, a negative errno value otherwise and rte_errno is set.
 */
int
mlx5_flow_validate_item_tcp(const struct rte_flow_item *item,
			    uint64_t item_flags,
			    uint8_t target_protocol,
			    const struct rte_flow_item_tcp *flow_mask,
			    struct rte_flow_error *error)
{
	const struct rte_flow_item_tcp *mask = item->mask;
	const int tunnel = !!(item_flags & MLX5_FLOW_LAYER_TUNNEL);
	const uint64_t l3m = tunnel ? MLX5_FLOW_LAYER_INNER_L3 :
				      MLX5_FLOW_LAYER_OUTER_L3;
	const uint64_t l4m = tunnel ? MLX5_FLOW_LAYER_INNER_L4 :
				      MLX5_FLOW_LAYER_OUTER_L4;
	int ret;

	MLX5_ASSERT(flow_mask);
	if (target_protocol != 0xff && target_protocol != IPPROTO_TCP)
		return rte_flow_error_set(error, EINVAL,
					  RTE_FLOW_ERROR_TYPE_ITEM, item,
					  "protocol filtering not compatible"
					  " with TCP layer");
	if (!(item_flags & l3m))
		return rte_flow_error_set(error, EINVAL,
					  RTE_FLOW_ERROR_TYPE_ITEM, item,
					  "L3 is mandatory to filter on L4");
	if (item_flags & l4m)
		return rte_flow_error_set(error, EINVAL,
					  RTE_FLOW_ERROR_TYPE_ITEM, item,
					  "multiple L4 layers not supported");
	if (!mask)
		mask = &rte_flow_item_tcp_mask;
	ret = mlx5_flow_item_acceptable
		(item, (const uint8_t *)mask,
		 (const uint8_t *)flow_mask,
		 sizeof(struct rte_flow_item_tcp), MLX5_ITEM_RANGE_NOT_ACCEPTED,
		 error);
	if (ret < 0)
		return ret;
	return 0;
}

/**
 * Validate VXLAN item.