ip_source_and_port_range_check.h File Reference

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Data Structures
struct	source_range_check_main_t
struct	ip_source_and_port_range_check_config_t
struct	u16x8vec_t
struct	protocol_port_range_t
struct	protocol_port_range_dpo_t_
	The object that is in the data-path to perform the check. More...

Macros
#define	IP_SOURCE_AND_PORT_RANGE_CHECK_RANGE_LIMIT   VLIB_BUFFER_PRE_DATA_SIZE/(2*sizeof(u16x8));
#define	N_PORT_RANGES_PER_DPO   64
	The number of supported ranges per-data path object. More...
#define	N_RANGES_PER_BLOCK   (sizeof(u16x8vec_t)/2)
#define	N_BLOCKS_PER_DPO   (N_PORT_RANGES_PER_DPO/N_RANGES_PER_BLOCK)

Typedefs
typedef struct protocol_port_range_dpo_t_	protocol_port_range_dpo_t
	The object that is in the data-path to perform the check. More...

Enumerations
enum	ip_source_and_port_range_check_protocol_t {   IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_TCP_OUT, IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_UDP_OUT, IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_TCP_IN, IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_UDP_IN,   IP_SOURCE_AND_PORT_RANGE_CHECK_N_PROTOCOLS }

Functions
int	ip4_source_and_port_range_check_add_del (ip4_address_t *address, u32 length, u32 vrf_id, u16 *low_ports, u16 *hi_ports, int is_add)
int	ip6_source_and_port_range_check_add_del (ip6_address_t *address, u32 length, u32 vrf_id, u16 *low_ports, u16 *hi_ports, int is_add)
int	set_ip_source_and_port_range_check (vlib_main_t *vm, u32 *fib_index, u32 sw_if_index, u32 is_add)

Variables
source_range_check_main_t	source_range_check_main

Macro Definition Documentation

IP_SOURCE_AND_PORT_RANGE_CHECK_RANGE_LIMIT

#define IP_SOURCE_AND_PORT_RANGE_CHECK_RANGE_LIMIT   VLIB_BUFFER_PRE_DATA_SIZE/(2*sizeof(u16x8));

Definition at line 43 of file ip_source_and_port_range_check.h.

N_BLOCKS_PER_DPO

#define N_BLOCKS_PER_DPO   (N_PORT_RANGES_PER_DPO/N_RANGES_PER_BLOCK)

Definition at line 66 of file ip_source_and_port_range_check.h.

N_PORT_RANGES_PER_DPO

#define N_PORT_RANGES_PER_DPO   64

The number of supported ranges per-data path object.

If more ranges are required, bump this number.

Definition at line 64 of file ip_source_and_port_range_check.h.

N_RANGES_PER_BLOCK

#define N_RANGES_PER_BLOCK   (sizeof(u16x8vec_t)/2)

Definition at line 65 of file ip_source_and_port_range_check.h.

Typedef Documentation

protocol_port_range_dpo_t

typedef struct protocol_port_range_dpo_t_ protocol_port_range_dpo_t

The object that is in the data-path to perform the check.

Some trade-offs here; memory vs performance.

performance: the principle factor is d-cache line misses/hits. so we want the data layout to minimise the d-cache misses. This means not following dependent reads. i.e. not doing

struct B { u16 n_ranges; range_t *ragnes; // vector of ranges. }

so to read ranges[0] we would first d-cache miss on the address of the object of type B, for which we would need to wait before we can get the address of B->ranges. So this layout is better:

struct B { u16 n_ranges; range_t ragnes[N]; }

memory: the latter layout above is more memory hungry. And N needs to be: 1 - sized for the maximum required 2 - fixed, so that objects of type B can be pool allocated and so 'get'-able using an index. An option over fixed might be to allocate contiguous chunk from the pool (like we used to do for multi-path adjs).

Enumeration Type Documentation

ip_source_and_port_range_check_protocol_t

enum ip_source_and_port_range_check_protocol_t

Enumerator
IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_TCP_OUT
IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_UDP_OUT
IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_TCP_IN
IP_SOURCE_AND_PORT_RANGE_CHECK_PROTOCOL_UDP_IN
IP_SOURCE_AND_PORT_RANGE_CHECK_N_PROTOCOLS

Definition at line 29 of file ip_source_and_port_range_check.h.

Function Documentation

ip4_source_and_port_range_check_add_del()

int ip4_source_and_port_range_check_add_del	(	ip4_address_t *	address,
		u32	length,
		u32	vrf_id,
		u16 *	low_ports,
		u16 *	hi_ports,
		int	is_add
	)

Definition at line 1141 of file ip4_source_and_port_range_check.c.

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ip6_source_and_port_range_check_add_del()

int ip6_source_and_port_range_check_add_del	(	ip6_address_t *	address,
		u32	length,
		u32	vrf_id,
		u16 *	low_ports,
		u16 *	hi_ports,
		int	is_add
	)

Definition at line 1123 of file ip4_source_and_port_range_check.c.

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set_ip_source_and_port_range_check()

int set_ip_source_and_port_range_check	(	vlib_main_t *	vm,
		u32 *	fib_index,
		u32	sw_if_index,
		u32	is_add
	)

Definition at line 622 of file ip4_source_and_port_range_check.c.

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Variable Documentation

source_range_check_main

source_range_check_main_t source_range_check_main

Definition at line 21 of file ip4_source_and_port_range_check.c.