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rte_lpm6.h(3) DPDK rte_lpm6.h(3)

NAME

rte_lpm6.h

SYNOPSIS

#include <stdint.h>

Data Structures


struct rte_lpm6_config

Macros


#define RTE_LPM6_NAMESIZE 32

Functions


struct rte_lpm6 * rte_lpm6_create (const char *name, int socket_id, const struct rte_lpm6_config *config)
struct rte_lpm6 * rte_lpm6_find_existing (const char *name)
void rte_lpm6_free (struct rte_lpm6 *lpm)
int rte_lpm6_add (struct rte_lpm6 *lpm, const uint8_t *ip, uint8_t depth, uint32_t next_hop)
int rte_lpm6_is_rule_present (struct rte_lpm6 *lpm, const uint8_t *ip, uint8_t depth, uint32_t *next_hop)
int rte_lpm6_delete (struct rte_lpm6 *lpm, const uint8_t *ip, uint8_t depth)
int rte_lpm6_delete_bulk_func (struct rte_lpm6 *lpm, uint8_t ips[][RTE_LPM6_IPV6_ADDR_SIZE], uint8_t *depths, unsigned n)
void rte_lpm6_delete_all (struct rte_lpm6 *lpm)
int rte_lpm6_lookup (const struct rte_lpm6 *lpm, const uint8_t *ip, uint32_t *next_hop)
int rte_lpm6_lookup_bulk_func (const struct rte_lpm6 *lpm, uint8_t ips[][RTE_LPM6_IPV6_ADDR_SIZE], int32_t *next_hops, unsigned int n)

Detailed Description

RTE Longest Prefix Match for IPv6 (LPM6)

Definition in file rte_lpm6.h.

Macro Definition Documentation

#define RTE_LPM6_NAMESIZE 32

Max number of characters in LPM name.

Definition at line 22 of file rte_lpm6.h.

Function Documentation

struct rte_lpm6* rte_lpm6_create (const char * name, int socket_id, const struct rte_lpm6_config * config)

Create an LPM object.

Parameters

name LPM object name
socket_id NUMA socket ID for LPM table memory allocation
config Structure containing the configuration

Returns

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
  • 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_find_existing (const char * name)

Find an existing LPM object and return a pointer to it.

Parameters

name Name of the lpm object as passed to rte_lpm6_create()

Returns

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.

void rte_lpm6_free (struct rte_lpm6 * lpm)

Free an LPM object.

Parameters

lpm LPM object handle If lpm is NULL, no operation is performed.

int rte_lpm6_add (struct rte_lpm6 * lpm, const uint8_t * ip, uint8_t depth, uint32_t next_hop)

Add a rule to the LPM table.

Parameters

lpm LPM object handle
ip IP of the rule to be added to the LPM table
depth Depth of the rule to be added to the LPM table
next_hop Next hop of the rule to be added to the LPM table

Returns

0 on success, negative value otherwise

int rte_lpm6_is_rule_present (struct rte_lpm6 * lpm, const uint8_t * ip, uint8_t depth, uint32_t * next_hop)

Check if a rule is present in the LPM table, and provide its next hop if it is.

Parameters

lpm LPM object handle
ip IP of the rule to be searched
depth Depth of the rule to searched
next_hop Next hop of the rule (valid only if it is found)

Returns

1 if the rule exists, 0 if it does not, a negative value on failure

int rte_lpm6_delete (struct rte_lpm6 * lpm, const uint8_t * ip, uint8_t depth)

Delete a rule from the LPM table.

Parameters

lpm LPM object handle
ip IP of the rule to be deleted from the LPM table
depth Depth of the rule to be deleted from the LPM table

Returns

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 a rule from the LPM table.

Parameters

lpm LPM object handle
ips Array of IPs to be deleted from the LPM table
depths Array of depths of the rules to be deleted from the LPM table
n Number of rules to be deleted from the LPM table

Returns

0 on success, negative value otherwise.

void rte_lpm6_delete_all (struct rte_lpm6 * lpm)

Delete all rules from the LPM table.

Parameters

lpm LPM object handle

int rte_lpm6_lookup (const struct rte_lpm6 * lpm, const uint8_t * ip, uint32_t * next_hop)

Lookup an IP into the LPM table.

Parameters

lpm LPM object handle
ip IP to be looked up in the LPM table
next_hop Next hop of the most specific rule found for IP (valid on lookup hit only)

Returns

-EINVAL for incorrect arguments, -ENOENT on lookup miss, 0 on lookup hit

int rte_lpm6_lookup_bulk_func (const struct rte_lpm6 * lpm, uint8_t ips[][RTE_LPM6_IPV6_ADDR_SIZE], int32_t * next_hops, unsigned int n)

Lookup multiple IP addresses in an LPM table.

Parameters

lpm LPM object handle
ips Array of IPs to be looked up in the LPM table
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.
n Number of elements in ips (and next_hops) array to lookup.

Returns

-EINVAL for incorrect arguments, otherwise 0

Author

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Fri Dec 15 2023 Version 23.11.0