nat_affinity.c File Reference

NAT plugin client-IP based session affinity for load-balancing. More...

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Macros
#define	AFFINITY_HASH_BUCKETS   65536
#define	AFFINITY_HASH_MEMORY   (2 << 25)

Functions
u8 *	format_affinity_kvp (u8 *s, va_list *args)
clib_error_t *	nat_affinity_init (vlib_main_t *vm)
	Initialize NAT client-IP based affinity. More...
static_always_inline void	make_affinity_kv (clib_bihash_kv_16_8_t *kv, ip4_address_t client_addr, ip4_address_t service_addr, u8 proto, u16 service_port)
u32	nat_affinity_get_per_service_list_head_index (void)
	Get new affinity per service list head index. More...
void	nat_affinity_flush_service (u32 affinity_per_service_list_head_index)
	Flush all service affinity data. More...
int	nat_affinity_find_and_lock (ip4_address_t client_addr, ip4_address_t service_addr, u8 proto, u16 service_port, u8 *backend_index)
	Find service backend index for client-IP and take a reference counting lock. More...
static int	affinity_is_expired_cb (clib_bihash_kv_16_8_t *kv, void *arg)
int	nat_affinity_create_and_lock (ip4_address_t client_addr, ip4_address_t service_addr, u8 proto, u16 service_port, u8 backend_index, u32 sticky_time, u32 affinity_per_service_list_head_index)
	Create affinity record and take reference counting lock. More...
void	nat_affinity_unlock (ip4_address_t client_addr, ip4_address_t service_addr, u8 proto, u16 service_port)
	Release a reference counting lock for affinity. More...

Variables
nat_affinity_main_t	nat_affinity_main

Detailed Description

NAT plugin client-IP based session affinity for load-balancing.

Definition in file nat_affinity.c.

Macro Definition Documentation

#define AFFINITY_HASH_BUCKETS   65536

Definition at line 25 of file nat_affinity.c.

#define AFFINITY_HASH_MEMORY   (2 << 25)

Definition at line 26 of file nat_affinity.c.

Function Documentation

static int affinity_is_expired_cb ( clib_bihash_kv_16_8_t *  kv, void *  arg  )

static

Definition at line 168 of file nat_affinity.c.

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u8* format_affinity_kvp	(	u8 *	s,
		va_list *	args
	)

Definition at line 29 of file nat_affinity.c.

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static_always_inline void make_affinity_kv	(	clib_bihash_kv_16_8_t *	kv,
		ip4_address_t	client_addr,
		ip4_address_t	service_addr,
		u8	proto,
		u16	service_port
	)

Definition at line 67 of file nat_affinity.c.

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int nat_affinity_create_and_lock	(	ip4_address_t	client_addr,
		ip4_address_t	service_addr,
		u8	proto,
		u16	service_port,
		u8	backend_index,
		u32	sticky_time,
		u32	affinity_per_service_list_head_index
	)

Create affinity record and take reference counting lock.

Parameters

client_addr	Client IP address.
service_addr	Service IP address.
proto	IP protocol number.
service_port	Service L4 port number.
backend_index	Service backend index for client-IP.
sticky_time	Affinity sticky time in seconds.
affinity_per_service_list_head_index	Per sevice list head index.

Returns

0 on success, non-zero value otherwise.

Definition at line 191 of file nat_affinity.c.

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int nat_affinity_find_and_lock	(	ip4_address_t	client_addr,
		ip4_address_t	service_addr,
		u8	proto,
		u16	service_port,
		u8 *	backend_index
	)

Find service backend index for client-IP and take a reference counting lock.

Parameters

client_addr	Client IP address.
service_addr	Service IP address.
proto	IP protocol number.
service_port	Service L4 port number.
backend_index	Service backend index for client-IP if found.

Returns

0 on success, non-zero value otherwise.

Definition at line 127 of file nat_affinity.c.

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void nat_affinity_flush_service

(

u32

affinity_per_service_list_head_index

)

Flush all service affinity data.

Parameters

affinity_per_service_list_head_index

Per sevice list head index.

Definition at line 97 of file nat_affinity.c.

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u32 nat_affinity_get_per_service_list_head_index

(

void

)

Get new affinity per service list head index.

Returns

new affinity per service list head index.

Definition at line 81 of file nat_affinity.c.

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clib_error_t* nat_affinity_init

(

vlib_main_t *

vm

)

Initialize NAT client-IP based affinity.

Parameters

vm	vlib main.

Returns

error code.

Definition at line 47 of file nat_affinity.c.

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void nat_affinity_unlock	(	ip4_address_t	client_addr,
		ip4_address_t	service_addr,
		u8	proto,
		u16	service_port
	)

Release a reference counting lock for affinity.

Parameters

client_addr	Client IP address.
service_addr	Service IP address.
proto	IP protocol number.

Definition at line 242 of file nat_affinity.c.

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Variable Documentation

nat_affinity_main_t nat_affinity_main

Definition at line 23 of file nat_affinity.c.