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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RTE_LPM6_H_
#define _RTE_LPM6_H_
/**
* @file
* RTE Longest Prefix Match for IPv6 (LPM6)
*/
#ifdef __cplusplus
extern "C" {
#endif
#define RTE_LPM6_MAX_DEPTH 128
#define RTE_LPM6_IPV6_ADDR_SIZE 16
/** Max number of characters in LPM name. */
#define RTE_LPM6_NAMESIZE 32
/** LPM structure. */
struct rte_lpm6;
/** LPM configuration structure. */
struct rte_lpm6_config {
uint32_t max_rules; /**< Max number of rules. */
uint32_t number_tbl8s; /**< Number of tbl8s to allocate. */
int flags; /**< This field is currently unused. */
};
/**
* Create an LPM object.
*
* @param name
* LPM object name
* @param socket_id
* NUMA socket ID for LPM table memory allocation
* @param config
* Structure containing the configuration
* @return
* Handle to LPM object on success, NULL otherwise with rte_errno set
* to an appropriate values. Possible rte_errno values include:
* - E_RTE_NO_CONFIG - function could not get pointer to rte_config structure
* - E_RTE_SECONDARY - function was called from a secondary process instance
* - E_RTE_NO_TAILQ - no tailq list could be got for the lpm object list
* - EINVAL - invalid parameter passed to function
* - ENOSPC - the maximum number of memzones has already been allocated
* - EEXIST - a memzone with the same name already exists
* - ENOMEM - no appropriate memory area found in which to create memzone
*/
struct rte_lpm6 *
rte_lpm6_create(const char *name, int socket_id,
const struct rte_lpm6_config *config);
/**
* Find an existing LPM object and return a pointer to it.
*
* @param name
* Name of the lpm object as passed to rte_lpm6_create()
* @return
* Pointer to lpm object or NULL if object not found with rte_errno
* set appropriately. Possible rte_errno values include:
* - ENOENT - required entry not available to return.
*/
struct rte_lpm6 *
rte_lpm6_find_existing(const char *name);
/**
* Free an LPM object.
*
* @param lpm
* LPM object handle
* @return
* None
*/
void
rte_lpm6_free(struct rte_lpm6 *lpm);
/**
* Add a rule to the LPM table.
*
* @param lpm
* LPM object handle
* @param ip
* IP of the rule to be added to the LPM table
* @param depth
* Depth of the rule to be added to the LPM table
* @param next_hop
* Next hop of the rule to be added to the LPM table
* @return
* 0 on success, negative value otherwise
*/
int
rte_lpm6_add(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t depth,
uint8_t next_hop);
/**
* Check if a rule is present in the LPM table,
* and provide its next hop if it is.
*
* @param lpm
* LPM object handle
* @param ip
* IP of the rule to be searched
* @param depth
* Depth of the rule to searched
* @param next_hop
* Next hop of the rule (valid only if it is found)
* @return
* 1 if the rule exists, 0 if it does not, a negative value on failure
*/
int
rte_lpm6_is_rule_present(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t depth,
uint8_t *next_hop);
/**
* Delete a rule from the LPM table.
*
* @param lpm
* LPM object handle
* @param ip
* IP of the rule to be deleted from the LPM table
* @param depth
* Depth of the rule to be deleted from the LPM table
* @return
* 0 on success, negative value otherwise
*/
int
rte_lpm6_delete(struct rte_lpm6 *lpm, uint8_t *ip, uint8_t depth);
/**
* Delete a rule from the LPM table.
*
* @param lpm
* LPM object handle
* @param ips
* Array of IPs to be deleted from the LPM table
* @param depths
* Array of depths of the rules to be deleted from the LPM table
* @param n
* Number of rules to be deleted from the LPM table
* @return
* 0 on success, negative value otherwise.
*/
int
rte_lpm6_delete_bulk_func(struct rte_lpm6 *lpm,
uint8_t ips[][RTE_LPM6_IPV6_ADDR_SIZE], uint8_t *depths, unsigned n);
/**
* Delete all rules from the LPM table.
*
* @param lpm
* LPM object handle
*/
void
rte_lpm6_delete_all(struct rte_lpm6 *lpm);
/**
* Lookup an IP into the LPM table.
*
* @param lpm
* LPM object handle
* @param ip
* IP to be looked up in the LPM table
* @param next_hop
* Next hop of the most specific rule found for IP (valid on lookup hit only)
* @return
* -EINVAL for incorrect arguments, -ENOENT on lookup miss, 0 on lookup hit
*/
int
rte_lpm6_lookup(const struct rte_lpm6 *lpm, uint8_t *ip, uint8_t *next_hop);
/**
* Lookup multiple IP addresses in an LPM table.
*
* @param lpm
* LPM object handle
* @param ips
* Array of IPs to be looked up in the LPM table
* @param next_hops
* Next hop of the most specific rule found for IP (valid on lookup hit only).
* This is an array of two byte values. The next hop will be stored on
* each position on success; otherwise the position will be set to -1.
* @param n
* Number of elements in ips (and next_hops) array to lookup.
* @return
* -EINVAL for incorrect arguments, otherwise 0
*/
int
rte_lpm6_lookup_bulk_func(const struct rte_lpm6 *lpm,
uint8_t ips[][RTE_LPM6_IPV6_ADDR_SIZE],
int16_t * next_hops, unsigned n);
#ifdef __cplusplus
}
#endif
#endif
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