rte_lpm6.h File Reference

#include <stdint.h>

Go to the source code of this file.

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

RTE_LPM6_NAMESIZE

#define RTE_LPM6_NAMESIZE   32

Max number of characters in LPM name.

Definition at line 22 of file rte_lpm6.h.

Function Documentation

rte_lpm6_create()

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

Examples

examples/ip_fragmentation/main.c, examples/ip_reassembly/main.c, examples/ipsec-secgw/rt.c, and examples/l3fwd/l3fwd_lpm.c.

rte_lpm6_find_existing()

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.

rte_lpm6_free()

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.

rte_lpm6_add()

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

Examples

examples/ip_fragmentation/main.c, examples/ip_reassembly/main.c, examples/ipsec-secgw/rt.c, and examples/l3fwd/l3fwd_lpm.c.

rte_lpm6_is_rule_present()

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

rte_lpm6_delete()

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

rte_lpm6_delete_bulk_func()

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.

rte_lpm6_delete_all()

void rte_lpm6_delete_all

(

struct rte_lpm6 *

lpm

)

Delete all rules from the LPM table.

Parameters

lpm	LPM object handle

rte_lpm6_lookup()

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

Examples

examples/ip_fragmentation/main.c, examples/ip_reassembly/main.c, examples/ipsec-secgw/ipsec_worker.c, and examples/l3fwd/l3fwd_lpm.c.

rte_lpm6_lookup_bulk_func()

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