nat_reass.c File Reference

NAT plugin virtual fragmentation reassembly. More...

Include dependency graph for nat_reass.c:

Go to the source code of this file.

Functions
static u32	nat_reass_get_nbuckets (u8 is_ip6)
static_always_inline void	nat_ip4_reass_get_frags_inline (nat_reass_ip4_t *reass, u32 **bi)
static_always_inline void	nat_ip6_reass_get_frags_inline (nat_reass_ip6_t *reass, u32 **bi)
int	nat_reass_set (u32 timeout, u16 max_reass, u8 max_frag, u8 drop_frag, u8 is_ip6)
	Set NAT virtual fragmentation reassembly configuration. More...
u32	nat_reass_get_timeout (u8 is_ip6)
	Get reassembly timeout. More...
u16	nat_reass_get_max_reass (u8 is_ip6)
	Get maximum number of concurrent reassemblies. More...
u8	nat_reass_get_max_frag (u8 is_ip6)
	Get maximum number of fragmets per reassembly. More...
u8	nat_reass_is_drop_frag (u8 is_ip6)
	Get status of virtual fragmentation reassembly. More...
static_always_inline nat_reass_ip4_t *	nat_ip4_reass_lookup (nat_reass_ip4_key_t *k, f64 now)
nat_reass_ip4_t *	nat_ip4_reass_find (ip4_address_t src, ip4_address_t dst, u16 frag_id, u8 proto)
	Find reassembly. More...
nat_reass_ip4_t *	nat_ip4_reass_create (ip4_address_t src, ip4_address_t dst, u16 frag_id, u8 proto)
	Create reassembly. More...
nat_reass_ip4_t *	nat_ip4_reass_find_or_create (ip4_address_t src, ip4_address_t dst, u16 frag_id, u8 proto, u8 reset_timeout, u32 **bi_to_drop)
	Find or create reassembly. More...
int	nat_ip4_reass_add_fragment (u32 thread_index, nat_reass_ip4_t *reass, u32 bi, u32 **bi_to_drop)
	Cache fragment. More...
void	nat_ip4_reass_get_frags (nat_reass_ip4_t *reass, u32 **bi)
	Get cached fragments. More...
void	nat_ip4_reass_walk (nat_ip4_reass_walk_fn_t fn, void *ctx)
	Walk IPv4 reassemblies. More...
static_always_inline nat_reass_ip6_t *	nat_ip6_reass_lookup (nat_reass_ip6_key_t *k, f64 now)
nat_reass_ip6_t *	nat_ip6_reass_find_or_create (ip6_address_t src, ip6_address_t dst, u32 frag_id, u8 proto, u8 reset_timeout, u32 **bi_to_drop)
	Find or create reassembly. More...
int	nat_ip6_reass_add_fragment (u32 thread_index, nat_reass_ip6_t *reass, u32 bi, u32 **bi_to_drop)
	Cache fragment. More...
void	nat_ip6_reass_get_frags (nat_reass_ip6_t *reass, u32 **bi)
	Get cached fragments. More...
void	nat_ip6_reass_walk (nat_ip6_reass_walk_fn_t fn, void *ctx)
	Walk IPv6 reassemblies. More...
clib_error_t *	nat_reass_init (vlib_main_t *vm)
	Initialize NAT virtual fragmentation reassembly. More...
static clib_error_t *	nat_reass_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
static int	nat_ip4_reass_walk_cli (nat_reass_ip4_t *reass, void *ctx)
static int	nat_ip6_reass_walk_cli (nat_reass_ip6_t *reass, void *ctx)
static clib_error_t *	show_nat_reass_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)

Variables
nat_reass_main_t	nat_reass_main
static vlib_cli_command_t	nat_reass_command
	(constructor) VLIB_CLI_COMMAND (nat_reass_command) More...
static vlib_cli_command_t	show_nat_reass_command
	(constructor) VLIB_CLI_COMMAND (show_nat_reass_command) More...

Detailed Description

NAT plugin virtual fragmentation reassembly.

Definition in file nat_reass.c.

Function Documentation

nat_ip4_reass_add_fragment()

int nat_ip4_reass_add_fragment	(	u32	thread_index,
		nat_reass_ip4_t *	reass,
		u32	bi,
		u32 **	bi_to_drop
	)

Cache fragment.

Parameters

reass	Reassembly data.
bi	Buffer index.
bi_to_drop	Fragments to drop.

Returns

0 on success, non-zero value otherwise.

Definition at line 392 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_ip4_reass_create()

nat_reass_ip4_t* nat_ip4_reass_create	(	ip4_address_t	src,
		ip4_address_t	dst,
		u16	frag_id,
		u8	proto
	)

Create reassembly.

Parameters

src	Source IPv4 address.
dst	Destination IPv4 address.
frag_id	Fragment ID.
proto	L4 protocol.

Returns

Reassembly data or 0 on failure.

Definition at line 220 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_ip4_reass_find()

nat_reass_ip4_t* nat_ip4_reass_find	(	ip4_address_t	src,
		ip4_address_t	dst,
		u16	frag_id,
		u8	proto
	)

Find reassembly.

Parameters

src	Source IPv4 address.
dst	Destination IPv4 address.
frag_id	Fragment ID.
proto	L4 protocol.

Returns

Reassembly data or 0 if not found.

Definition at line 199 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_ip4_reass_find_or_create()

nat_reass_ip4_t* nat_ip4_reass_find_or_create	(	ip4_address_t	src,
		ip4_address_t	dst,
		u16	frag_id,
		u8	proto,
		u8	reset_timeout,
		u32 **	bi_to_drop
	)

Find or create reassembly.

Parameters

src	Source IPv4 address.
dst	Destination IPv4 address.
frag_id	Fragment ID.
proto	L4 protocol.
reset_timeout	If non-zero value reset timeout.
bi_to_drop	Fragments to drop.

Returns

Reassembly data or 0 on failure.

Definition at line 274 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_ip4_reass_get_frags()

void nat_ip4_reass_get_frags	(	nat_reass_ip4_t *	reass,
		u32 **	bi
	)

Get cached fragments.

Parameters

reass	Reassembly data.
bi	Vector of buffer indexes.

Definition at line 424 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_ip4_reass_get_frags_inline()

static_always_inline void nat_ip4_reass_get_frags_inline	(	nat_reass_ip4_t *	reass,
		u32 **	bi
	)

Definition at line 47 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_ip4_reass_lookup()

static_always_inline nat_reass_ip4_t* nat_ip4_reass_lookup	(	nat_reass_ip4_key_t *	k,
		f64	now
	)

Definition at line 179 of file nat_reass.c.

Here is the caller graph for this function:

nat_ip4_reass_walk()

void nat_ip4_reass_walk	(	nat_ip4_reass_walk_fn_t	fn,
		void *	ctx
	)

Walk IPv4 reassemblies.

Parameters

fn	The function to invoke on each entry visited.
ctx	A context passed in the visit function.

Definition at line 436 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_ip4_reass_walk_cli()

static int nat_ip4_reass_walk_cli ( nat_reass_ip4_t *  reass, void *  ctx  )

static

Definition at line 780 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_ip6_reass_add_fragment()

int nat_ip6_reass_add_fragment	(	u32	thread_index,
		nat_reass_ip6_t *	reass,
		u32	bi,
		u32 **	bi_to_drop
	)

Cache fragment.

Parameters

reass	Reassembly data.
bi	Buffer index.
bi_to_drop	Fragments to drop.

Returns

0 on success, non-zero value otherwise.

Definition at line 598 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_ip6_reass_find_or_create()

nat_reass_ip6_t* nat_ip6_reass_find_or_create	(	ip6_address_t	src,
		ip6_address_t	dst,
		u32	frag_id,
		u8	proto,
		u8	reset_timeout,
		u32 **	bi_to_drop
	)

Find or create reassembly.

Parameters

src	Source IPv6 address.
dst	Destination IPv6 address.
frag_id	Fragment ID.
proto	L4 protocol.
reset_timeout	If non-zero value reset timeout.
bi_to_drop	Fragments to drop.

Returns

Reassembly data or 0 on failure.

Definition at line 480 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_ip6_reass_get_frags()

void nat_ip6_reass_get_frags	(	nat_reass_ip6_t *	reass,
		u32 **	bi
	)

Get cached fragments.

Parameters

reass	Reassembly data.
bi	Vector of buffer indexes.

Definition at line 630 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_ip6_reass_get_frags_inline()

static_always_inline void nat_ip6_reass_get_frags_inline	(	nat_reass_ip6_t *	reass,
		u32 **	bi
	)

Definition at line 66 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_ip6_reass_lookup()

static_always_inline nat_reass_ip6_t* nat_ip6_reass_lookup	(	nat_reass_ip6_key_t *	k,
		f64	now
	)

Definition at line 455 of file nat_reass.c.

Here is the caller graph for this function:

nat_ip6_reass_walk()

void nat_ip6_reass_walk	(	nat_ip6_reass_walk_fn_t	fn,
		void *	ctx
	)

Walk IPv6 reassemblies.

Parameters

fn	The function to invoke on each entry visited.
ctx	A context passed in the visit function.

Definition at line 642 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_ip6_reass_walk_cli()

static int nat_ip6_reass_walk_cli ( nat_reass_ip6_t *  reass, void *  ctx  )

static

Definition at line 833 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_reass_command_fn()

static clib_error_t* nat_reass_command_fn ( vlib_main_t *  vm, unformat_input_t *  input, vlib_cli_command_t *  cmd  )

static

Definition at line 718 of file nat_reass.c.

Here is the call graph for this function:

nat_reass_get_max_frag()

u8 nat_reass_get_max_frag

(

u8

is_ip6

)

Get maximum number of fragmets per reassembly.

Parameters

is_ip6

1 if IPv6, 0 if IPv4.

Returns

maximum number of fragmets per reassembly.

Definition at line 157 of file nat_reass.c.

Here is the caller graph for this function:

nat_reass_get_max_reass()

u16 nat_reass_get_max_reass

(

u8

is_ip6

)

Get maximum number of concurrent reassemblies.

Parameters

is_ip6

1 if IPv6, 0 if IPv4.

Returns

maximum number of concurrent reassemblies.

Definition at line 146 of file nat_reass.c.

Here is the caller graph for this function:

nat_reass_get_nbuckets()

static u32 nat_reass_get_nbuckets ( u8  is_ip6 )

static

Definition at line 27 of file nat_reass.c.

Here is the caller graph for this function:

nat_reass_get_timeout()

u32 nat_reass_get_timeout

(

u8

is_ip6

)

Get reassembly timeout.

Parameters

is_ip6

1 if IPv6, 0 if IPv4.

Returns

reassembly timeout.

Definition at line 135 of file nat_reass.c.

Here is the caller graph for this function:

nat_reass_init()

clib_error_t* nat_reass_init

(

vlib_main_t *

vm

)

Initialize NAT virtual fragmentation reassembly.

Parameters

vm	vlib main.

Returns

error code.

Definition at line 661 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

nat_reass_is_drop_frag()

u8 nat_reass_is_drop_frag

(

u8

is_ip6

)

Get status of virtual fragmentation reassembly.

Parameters

is_ip6

1 if IPv6, 0 if IPv4.

Returns

zero if translate fragments, non-zero value if drop fragments.

Definition at line 168 of file nat_reass.c.

Here is the caller graph for this function:

nat_reass_set()

int nat_reass_set	(	u32	timeout,
		u16	max_reass,
		u8	max_frag,
		u8	drop_frag,
		u8	is_ip6
	)

Set NAT virtual fragmentation reassembly configuration.

Parameters

timeout	Reassembly timeout.
max_reass	Maximum number of concurrent reassemblies.
max_frag	Maximum number of fragmets per reassembly
drop_frag	If zero translate fragments, otherwise drop fragments.
is_ip6	1 if IPv6, 0 if IPv4.

Returns

0 on success, non-zero value otherwise.

Definition at line 85 of file nat_reass.c.

Here is the call graph for this function:

Here is the caller graph for this function:

show_nat_reass_command_fn()

static clib_error_t* show_nat_reass_command_fn ( vlib_main_t *  vm, unformat_input_t *  input, vlib_cli_command_t *  cmd  )

static

Definition at line 847 of file nat_reass.c.

Here is the call graph for this function:

Variable Documentation

nat_reass_command

vlib_cli_command_t nat_reass_command

static

Initial value:

=
{
  .path = "nat virtual-reassembly",
  .short_help = "nat virtual-reassembly ip4|ip6 [max-reassemblies <n>] "
                "[max-fragments <n>] [timeout <sec>] [enable|disable]",
  .function = nat_reass_command_fn,
}

(constructor) VLIB_CLI_COMMAND (nat_reass_command)

Definition at line 870 of file nat_reass.c.

nat_reass_main

nat_reass_main_t nat_reass_main

Definition at line 24 of file nat_reass.c.

show_nat_reass_command

vlib_cli_command_t show_nat_reass_command

static

Initial value:

=
{
  .path = "show nat virtual-reassembly",
  .short_help = "show nat virtual-reassembly",
  .function = show_nat_reass_command_fn,
}

(constructor) VLIB_CLI_COMMAND (show_nat_reass_command)

Definition at line 878 of file nat_reass.c.