adj_glean.c File Reference

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Functions
static u32	adj_get_glean_node (fib_protocol_t proto)
static adj_index_t	adj_glean_db_lookup (fib_protocol_t proto, u32 sw_if_index, const ip46_address_t *nh_addr)
static void	adj_glean_db_insert (fib_protocol_t proto, u32 sw_if_index, const ip46_address_t *nh_addr, adj_index_t ai)
static void	adj_glean_db_remove (fib_protocol_t proto, u32 sw_if_index, const ip46_address_t *nh_addr)
adj_index_t	adj_glean_add_or_lock (fib_protocol_t proto, vnet_link_t linkt, u32 sw_if_index, const fib_prefix_t *conn)
	Glean Adjacency. More...
void	adj_glean_update_rewrite (adj_index_t adj_index)
	adj_glean_update_rewrite More...
static adj_walk_rc_t	adj_glean_update_rewrite_walk (adj_index_t ai, void *data)
void	adj_glean_update_rewrite_itf (u32 sw_if_index)
void	adj_glean_walk (u32 sw_if_index, adj_walk_cb_t cb, void *data)
	Walk all the gleans on an interface. More...
adj_index_t	adj_glean_get (fib_protocol_t proto, u32 sw_if_index, const ip46_address_t *nh)
	Get an existing glean. More...
const ip46_address_t *	adj_glean_get_src (fib_protocol_t proto, u32 sw_if_index, const ip46_address_t *nh)
	Return the source address from the glean. More...
void	adj_glean_remove (ip_adjacency_t *adj)
static adj_walk_rc_t	adj_glean_start_backwalk (adj_index_t ai, void *data)
static clib_error_t *	adj_glean_interface_state_change (vnet_main_t *vnm, u32 sw_if_index, u32 flags)
	VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (adj_glean_interface_state_change)
static walk_rc_t	adj_nbr_hw_sw_interface_state_change (vnet_main_t *vnm, u32 sw_if_index, void *arg)
	Invoked on each SW interface of a HW interface when the HW interface state changes. More...
static clib_error_t *	adj_glean_hw_interface_state_change (vnet_main_t *vnm, u32 hw_if_index, u32 flags)
	Registered callback for HW interface state changes. More...
	VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION (adj_glean_hw_interface_state_change)
static clib_error_t *	adj_glean_interface_delete (vnet_main_t *vnm, u32 sw_if_index, u32 is_add)
	VNET_SW_INTERFACE_ADD_DEL_FUNCTION (adj_glean_interface_delete)
u8 *	format_adj_glean (u8 *s, va_list *ap)
	Format/display a glean adjacency. More...
u32	adj_glean_db_size (void)
	Return the size of the adjacency database. More...
static void	adj_dpo_lock (dpo_id_t *dpo)
static void	adj_dpo_unlock (dpo_id_t *dpo)
void	adj_glean_module_init (void)
	Module initialisation. More...

Variables
static uword **	adj_gleans [FIB_PROTOCOL_IP_MAX]
static const dpo_vft_t	adj_glean_dpo_vft
static const char *const	glean_ip4_nodes []
	The per-protocol VLIB graph nodes that are assigned to a glean object. More...
static const char *const	glean_ip6_nodes []
static const char *const *const	glean_nodes [DPO_PROTO_NUM]

Function Documentation

adj_dpo_lock()

static void adj_dpo_lock ( dpo_id_t *  dpo )

static

Definition at line 465 of file adj_glean.c.

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adj_dpo_unlock()

static void adj_dpo_unlock ( dpo_id_t *  dpo )

static

Definition at line 470 of file adj_glean.c.

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adj_get_glean_node()

static u32 adj_get_glean_node ( fib_protocol_t  proto )

inlinestatic

Definition at line 27 of file adj_glean.c.

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adj_glean_add_or_lock()

adj_index_t adj_glean_add_or_lock	(	fib_protocol_t	proto,
		vnet_link_t	linkt,
		u32	sw_if_index,
		const fib_prefix_t *	conn
	)

Glean Adjacency.

A gleean adjacency represent the need to discover new peers on an attached link. Packets that hit a glean adjacency will generate an ARP/ND packet addessesed to the packet's destination address. Note this is different to an incomplete neighbour adjacency, which does not send ARP/ND requests to the packet's destination address, but instead to the next-hop address of the adjacency itself.

Add (and lock) a new or lock an existing glean adjacency

Parameters

proto	The protocol for the neighbours that we wish to glean
sw_if_index	The interface on which to glean
nh_addr	the address applied to the interface on which to glean. This as the source address in packets when the ARP/ND packet is sent

Definition at line 112 of file adj_glean.c.

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adj_glean_db_insert()

static void adj_glean_db_insert ( fib_protocol_t  proto, u32  sw_if_index, const ip46_address_t *  nh_addr, adj_index_t  ai  )

static

Definition at line 60 of file adj_glean.c.

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adj_glean_db_lookup()

static adj_index_t adj_glean_db_lookup ( fib_protocol_t  proto, u32  sw_if_index, const ip46_address_t *  nh_addr  )

static

Definition at line 42 of file adj_glean.c.

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adj_glean_db_remove()

static void adj_glean_db_remove ( fib_protocol_t  proto, u32  sw_if_index, const ip46_address_t *  nh_addr  )

static

Definition at line 84 of file adj_glean.c.

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adj_glean_db_size()

u32 adj_glean_db_size

(

void

)

Return the size of the adjacency database.

for testing purposes

Definition at line 445 of file adj_glean.c.

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adj_glean_get()

adj_index_t adj_glean_get	(	fib_protocol_t	proto,
		u32	sw_if_index,
		const ip46_address_t *	nh_addr
	)

Get an existing glean.

Returns

INVALID if it does not exist

Definition at line 231 of file adj_glean.c.

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adj_glean_get_src()

const ip46_address_t* adj_glean_get_src	(	fib_protocol_t	proto,
		u32	sw_if_index,
		const ip46_address_t *	nh
	)

Return the source address from the glean.

Definition at line 257 of file adj_glean.c.

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adj_glean_hw_interface_state_change()

static clib_error_t* adj_glean_hw_interface_state_change ( vnet_main_t *  vnm, u32  hw_if_index, u32  flags  )

static

Registered callback for HW interface state changes.

Definition at line 368 of file adj_glean.c.

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adj_glean_interface_delete()

static clib_error_t* adj_glean_interface_delete ( vnet_main_t *  vnm, u32  sw_if_index, u32  is_add  )

static

Definition at line 392 of file adj_glean.c.

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adj_glean_interface_state_change()

static clib_error_t* adj_glean_interface_state_change ( vnet_main_t *  vnm, u32  sw_if_index, u32  flags  )

static

Definition at line 330 of file adj_glean.c.

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adj_glean_module_init()

void adj_glean_module_init

(

void

)

Module initialisation.

Definition at line 508 of file adj_glean.c.

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adj_glean_remove()

void adj_glean_remove

(

ip_adjacency_t *

adj

)

Definition at line 307 of file adj_glean.c.

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adj_glean_start_backwalk()

static adj_walk_rc_t adj_glean_start_backwalk ( adj_index_t  ai, void *  data  )

static

Definition at line 319 of file adj_glean.c.

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adj_glean_update_rewrite()

void adj_glean_update_rewrite

(

adj_index_t

adj_index

)

adj_glean_update_rewrite

Called by an adjacency provider (an interface type) to configure a glean adj (i.e. and adjacency linked to a connected prefix) to its default behaviour. Other interface types (i.e. 6RD tunnels) can can choose not to use glean behaviour on an adjacency liked to a connected prefix.

Definition at line 163 of file adj_glean.c.

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adj_glean_update_rewrite_itf()

void adj_glean_update_rewrite_itf

(

u32

sw_if_index

)

Definition at line 190 of file adj_glean.c.

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adj_glean_update_rewrite_walk()

static adj_walk_rc_t adj_glean_update_rewrite_walk ( adj_index_t  ai, void *  data  )

static

Definition at line 181 of file adj_glean.c.

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adj_glean_walk()

void adj_glean_walk	(	u32	sw_if_index,
		adj_walk_cb_t	cb,
		void *	data
	)

Walk all the gleans on an interface.

Definition at line 196 of file adj_glean.c.

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adj_nbr_hw_sw_interface_state_change()

static walk_rc_t adj_nbr_hw_sw_interface_state_change ( vnet_main_t *  vnm, u32  sw_if_index, void *  arg  )

static

Invoked on each SW interface of a HW interface when the HW interface state changes.

Definition at line 355 of file adj_glean.c.

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format_adj_glean()

u8* format_adj_glean	(	u8 *	s,
		va_list *	ap
	)

Format/display a glean adjacency.

Definition at line 429 of file adj_glean.c.

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VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION()

VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION

(

adj_glean_hw_interface_state_change

)

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VNET_SW_INTERFACE_ADD_DEL_FUNCTION()

VNET_SW_INTERFACE_ADD_DEL_FUNCTION

(

adj_glean_interface_delete

)

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VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION()

VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION

(

adj_glean_interface_state_change

)

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Variable Documentation

adj_glean_dpo_vft

const dpo_vft_t adj_glean_dpo_vft

static

Initial value:

= {
    .dv_lock = adj_dpo_lock,
    .dv_unlock = adj_dpo_unlock,
    .dv_format = format_adj_glean,
    .dv_get_urpf = adj_dpo_get_urpf,
}

Definition at line 475 of file adj_glean.c.

adj_gleans

uword** adj_gleans[FIB_PROTOCOL_IP_MAX]

static

Definition at line 24 of file adj_glean.c.

glean_ip4_nodes

const char* const glean_ip4_nodes[]

static

Initial value:

=
{
    "ip4-glean",
    NULL,
}

The per-protocol VLIB graph nodes that are assigned to a glean object.

this means that these graph nodes are ones from which a glean is the parent object in the DPO-graph.

Definition at line 489 of file adj_glean.c.

glean_ip6_nodes

const char* const glean_ip6_nodes[]

static

Initial value:

=
{
    "ip6-glean",
    NULL,
}

Definition at line 494 of file adj_glean.c.

glean_nodes

const char* const* const glean_nodes[DPO_PROTO_NUM]

static

Initial value:

=
{
    [DPO_PROTO_IP4]  = glean_ip4_nodes,
    [DPO_PROTO_IP6]  = glean_ip6_nodes,
    [DPO_PROTO_MPLS] = NULL,
}

Definition at line 500 of file adj_glean.c.