adj_nbr.c File Reference

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Data Structures
struct	adj_nbr_key_t_
struct	adj_nbr_interface_state_change_ctx_t_
	Context for the state change walk of the DB. More...

Macros
#define	ADJ_NBR_SET_KEY(_key, _lt, _nh)
#define	ADJ_NBR_ITF_OK(_proto, _itf)
#define	ADJ_NBR_ASSERT_NH_PROTO(nh_proto, err)

Typedefs
typedef struct adj_nbr_key_t_	adj_nbr_key_t
typedef enum adj_nbr_interface_flags_t_	adj_nbr_interface_flags_t
	Flags associated with the interface state walks. More...
typedef struct adj_nbr_interface_state_change_ctx_t_	adj_nbr_interface_state_change_ctx_t
	Context for the state change walk of the DB. More...

Enumerations
enum	adj_nbr_interface_flags_t_ { ADJ_NBR_INTERFACE_UP = (1 << 0) }
	Flags associated with the interface state walks. More...

Functions
static void	adj_nbr_insert (fib_protocol_t nh_proto, vnet_link_t link_type, const ip46_address_t *nh_addr, u32 sw_if_index, adj_index_t adj_index)
void	adj_nbr_remove (adj_index_t ai, fib_protocol_t nh_proto, vnet_link_t link_type, const ip46_address_t *nh_addr, u32 sw_if_index)
adj_index_t	adj_nbr_find (fib_protocol_t nh_proto, vnet_link_t link_type, const ip46_address_t *nh_addr, u32 sw_if_index)
	Lookup neighbor adjancency. More...
static u32	adj_get_nd_node (fib_protocol_t proto)
static void	adj_nbr_evaluate_feature (adj_index_t ai)
	Check and set feature flags if o/p interface has any o/p features. More...
static ip_adjacency_t *	adj_nbr_alloc (fib_protocol_t nh_proto, vnet_link_t link_type, const ip46_address_t *nh_addr, u32 sw_if_index)
void	adj_nbr_set_mtu (adj_index_t adj_index, u16 mtu)
	Set the MTU on an adjacency. More...
adj_index_t	adj_nbr_add_or_lock (fib_protocol_t nh_proto, vnet_link_t link_type, const ip46_address_t *nh_addr, u32 sw_if_index)
	Neighbour Adjacency sub-type. More...
adj_index_t	adj_nbr_add_or_lock_w_rewrite (fib_protocol_t nh_proto, vnet_link_t link_type, const ip46_address_t *nh_addr, u32 sw_if_index, u8 *rewrite)
	Add (and lock) a new or lock an existing neighbour adjacency. More...
void	adj_nbr_update_rewrite (adj_index_t adj_index, adj_nbr_rewrite_flag_t flags, u8 *rewrite)
	adj_nbr_update_rewrite More...
void	adj_nbr_update_rewrite_internal (ip_adjacency_t *adj, ip_lookup_next_t adj_next_index, u32 this_node, u32 next_node, u8 *rewrite)
	adj_nbr_update_rewrite_internal More...
u32	adj_nbr_db_size (void)
	Return the size of the adjacency database. More...
void	adj_nbr_walk (u32 sw_if_index, fib_protocol_t adj_nh_proto, adj_walk_cb_t cb, void *ctx)
	Walk all adjacencies on a link for a given next-hop protocol. More...
void	adj_nbr_walk_nh4 (u32 sw_if_index, const ip4_address_t *addr, adj_walk_cb_t cb, void *ctx)
	Walk adjacencies on a link with a given v4 next-hop. More...
void	adj_nbr_walk_nh6 (u32 sw_if_index, const ip6_address_t *addr, adj_walk_cb_t cb, void *ctx)
	Walk adjacencies on a link with a given v6 next-hop. More...
void	adj_nbr_walk_nh (u32 sw_if_index, fib_protocol_t adj_nh_proto, const ip46_address_t *nh, adj_walk_cb_t cb, void *ctx)
	Walk adjacencies on a link with a given next-hop. More...
static adj_walk_rc_t	adj_nbr_interface_state_change_one (adj_index_t ai, void *arg)
static clib_error_t *	adj_nbr_sw_interface_state_change (vnet_main_t *vnm, u32 sw_if_index, u32 flags)
	Registered function for SW interface state changes. More...
	VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION_PRIO (adj_nbr_sw_interface_state_change, VNET_ITF_FUNC_PRIORITY_HIGH)
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_nbr_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_PRIO (adj_nbr_hw_interface_state_change, VNET_ITF_FUNC_PRIORITY_HIGH)
static adj_walk_rc_t	adj_nbr_interface_delete_one (adj_index_t ai, void *arg)
static clib_error_t *	adj_nbr_interface_add_del (vnet_main_t *vnm, u32 sw_if_index, u32 is_add)
	adj_nbr_interface_add_del More...
	VNET_SW_INTERFACE_ADD_DEL_FUNCTION (adj_nbr_interface_add_del)
static adj_walk_rc_t	adj_nbr_ethernet_mac_change_one (adj_index_t ai, void *arg)
static void	adj_nbr_ethernet_change_mac (ethernet_main_t *em, u32 sw_if_index, uword opaque)
	Callback function invoked when an interface's MAC Address changes. More...
static adj_walk_rc_t	adj_nbr_show_one (adj_index_t ai, void *arg)
static clib_error_t *	adj_nbr_show (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
u8 *	format_adj_nbr_incomplete (u8 *s, va_list *ap)
	Format aa incomplete neigbour (ARP) adjacency. More...
u8 *	format_adj_nbr (u8 *s, va_list *ap)
	Format a neigbour (REWRITE) adjacency. More...
static void	adj_dpo_lock (dpo_id_t *dpo)
static void	adj_dpo_unlock (dpo_id_t *dpo)
static void	adj_mem_show (void)
void	adj_nbr_module_init (void)
	Module initialisation. More...

Variables
static uword **	adj_nbr_tables [FIB_PROTOCOL_IP_MAX]
static vlib_cli_command_t	ip4_show_fib_command
	(constructor) VLIB_CLI_COMMAND (ip4_show_fib_command) More...
const static dpo_vft_t	adj_nbr_dpo_vft
const static dpo_vft_t	adj_nbr_incompl_dpo_vft
const static char *const	nbr_ip4_nodes []
	The per-protocol VLIB graph nodes that are assigned to an adjacency object. More...
const static char *const	nbr_ip6_nodes []
const static char *const	nbr_mpls_nodes []
const static char *const	nbr_ethernet_nodes []
const static char *const *const	nbr_nodes [DPO_PROTO_NUM]
const static char *const	nbr_incomplete_ip4_nodes []
const static char *const	nbr_incomplete_ip6_nodes []
const static char *const	nbr_incomplete_mpls_nodes []
const static char *const *const	nbr_incomplete_nodes [DPO_PROTO_NUM]

Macro Definition Documentation

ADJ_NBR_ASSERT_NH_PROTO

#define ADJ_NBR_ASSERT_NH_PROTO	(		nh_proto,
			err
	)

Value:

  do {                                                  \
      ASSERT (nh_proto < FIB_PROTOCOL_IP_MAX);          \
      const fib_protocol_t nh_proto__ = (nh_proto);     \
      if (nh_proto__ >= FIB_PROTOCOL_IP_MAX)            \
        {                                               \
          clib_warning ("BUG: protocol %d > %d\n",      \
                        (int)nh_proto__,                \
                        FIB_PROTOCOL_IP_MAX);           \
          return err;                                   \
        }                                               \
  } while (0)

Definition at line 44 of file adj_nbr.c.

ADJ_NBR_ITF_OK

#define ADJ_NBR_ITF_OK	(		_proto,
			_itf
	)

Value:

    (((_itf) < vec_len(adj_nbr_tables[_proto])) &&      \
     (NULL != adj_nbr_tables[_proto][(_itf)]))

Definition at line 40 of file adj_nbr.c.

ADJ_NBR_SET_KEY

#define ADJ_NBR_SET_KEY	(		_key,
			_lt,
			_nh
	)

Value:

{                                               \
    ip46_address_copy(&(_key).ank_ip, (_nh));   \
    _key.ank_linkt = (_lt);                     \
}

Definition at line 34 of file adj_nbr.c.

Typedef Documentation

adj_nbr_interface_flags_t

typedef enum adj_nbr_interface_flags_t_ adj_nbr_interface_flags_t

Flags associated with the interface state walks.

adj_nbr_interface_state_change_ctx_t

typedef struct adj_nbr_interface_state_change_ctx_t_ adj_nbr_interface_state_change_ctx_t

Context for the state change walk of the DB.

adj_nbr_key_t

typedef struct adj_nbr_key_t_ adj_nbr_key_t

Enumeration Type Documentation

adj_nbr_interface_flags_t_

enum adj_nbr_interface_flags_t_

Flags associated with the interface state walks.

Enumerator
ADJ_NBR_INTERFACE_UP

Definition at line 712 of file adj_nbr.c.

Function Documentation

adj_dpo_lock()

static void adj_dpo_lock ( dpo_id_t *  dpo )

static

Definition at line 1084 of file adj_nbr.c.

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adj_dpo_unlock()

static void adj_dpo_unlock ( dpo_id_t *  dpo )

static

Definition at line 1089 of file adj_nbr.c.

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adj_get_nd_node()

static u32 adj_get_nd_node ( fib_protocol_t  proto )

inlinestatic

Definition at line 134 of file adj_nbr.c.

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adj_mem_show()

static void adj_mem_show ( void  )

static

Definition at line 1095 of file adj_nbr.c.

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adj_nbr_add_or_lock()

adj_index_t adj_nbr_add_or_lock	(	fib_protocol_t	nh_proto,
		vnet_link_t	link_type,
		const ip46_address_t *	nh_addr,
		u32	sw_if_index
	)

Neighbour Adjacency sub-type.

These adjs represent an L3 peer on a connected link.

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

Parameters

nh_proto	The protocol for the next-hop address (v4 or v6)
link_type	A description of the protocol of the packets that will forward through this adj. On an ethernet interface this is the MAC header's ether-type
nh_addr	The address of the next-hop/peer to send the packet to
sw_if_index	The interface on which the peer resides

Definition at line 257 of file adj_nbr.c.

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adj_nbr_add_or_lock_w_rewrite()

adj_index_t adj_nbr_add_or_lock_w_rewrite	(	fib_protocol_t	nh_proto,
		vnet_link_t	link_type,
		const ip46_address_t *	nh_addr,
		u32	sw_if_index,
		u8 *	rewrite
	)

Add (and lock) a new or lock an existing neighbour adjacency.

Parameters

nh_proto	The protocol for the next-hop address (v4 or v6)
link_type	A description of the protocol of the packets that will forward through this adj. On an ethernet interface this is the MAC header's ether-type
nh_addr	The address of the next-hop/peer to send the packet to
sw_if_index	The interface on which the peer resides
rewrite	The rewrite to prepend to packets

Definition at line 303 of file adj_nbr.c.

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adj_nbr_alloc()

static ip_adjacency_t* adj_nbr_alloc ( fib_protocol_t  nh_proto, vnet_link_t  link_type, const ip46_address_t *  nh_addr, u32  sw_if_index  )

static

Definition at line 196 of file adj_nbr.c.

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adj_nbr_db_size()

u32 adj_nbr_db_size

(

void

)

Return the size of the adjacency database.

for testing purposes

Definition at line 569 of file adj_nbr.c.

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adj_nbr_ethernet_change_mac()

static void adj_nbr_ethernet_change_mac ( ethernet_main_t *  em, u32  sw_if_index, uword  opaque  )

static

Callback function invoked when an interface's MAC Address changes.

Definition at line 933 of file adj_nbr.c.

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adj_nbr_ethernet_mac_change_one()

static adj_walk_rc_t adj_nbr_ethernet_mac_change_one ( adj_index_t  ai, void *  arg  )

static

Definition at line 919 of file adj_nbr.c.

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adj_nbr_evaluate_feature()

static void adj_nbr_evaluate_feature ( adj_index_t  ai )

static

Check and set feature flags if o/p interface has any o/p features.

Definition at line 152 of file adj_nbr.c.

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adj_nbr_find()

adj_index_t adj_nbr_find	(	fib_protocol_t	nh_proto,
		vnet_link_t	link_type,
		const ip46_address_t *	nh_addr,
		u32	sw_if_index
	)

Lookup neighbor adjancency.

Definition at line 109 of file adj_nbr.c.

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adj_nbr_hw_interface_state_change()

static clib_error_t* adj_nbr_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 826 of file adj_nbr.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 803 of file adj_nbr.c.

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adj_nbr_insert()

static void adj_nbr_insert ( fib_protocol_t  nh_proto, vnet_link_t  link_type, const ip46_address_t *  nh_addr, u32  sw_if_index, adj_index_t  adj_index  )

static

Definition at line 58 of file adj_nbr.c.

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adj_nbr_interface_add_del()

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

static

adj_nbr_interface_add_del

Registered to receive interface Add and delete notifications

Definition at line 881 of file adj_nbr.c.

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adj_nbr_interface_delete_one()

static adj_walk_rc_t adj_nbr_interface_delete_one ( adj_index_t  ai, void *  arg  )

static

Definition at line 851 of file adj_nbr.c.

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adj_nbr_interface_state_change_one()

static adj_walk_rc_t adj_nbr_interface_state_change_one ( adj_index_t  ai, void *  arg  )

static

Definition at line 729 of file adj_nbr.c.

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adj_nbr_module_init()

void adj_nbr_module_init

(

void

)

Module initialisation.

Definition at line 1178 of file adj_nbr.c.

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adj_nbr_remove()

void adj_nbr_remove	(	adj_index_t	ai,
		fib_protocol_t	nh_proto,
		vnet_link_t	link_type,
		const ip46_address_t *	nh_addr,
		u32	sw_if_index
	)

Definition at line 85 of file adj_nbr.c.

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adj_nbr_set_mtu()

void adj_nbr_set_mtu	(	adj_index_t	ai,
		u16	mtu
	)

Set the MTU on an adjacency.

Definition at line 226 of file adj_nbr.c.

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adj_nbr_show()

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

static

Definition at line 959 of file adj_nbr.c.

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adj_nbr_show_one()

static adj_walk_rc_t adj_nbr_show_one ( adj_index_t  ai, void *  arg  )

static

Definition at line 947 of file adj_nbr.c.

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adj_nbr_sw_interface_state_change()

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

static

Registered function for SW interface state changes.

Definition at line 769 of file adj_nbr.c.

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adj_nbr_update_rewrite()

void adj_nbr_update_rewrite	(	adj_index_t	adj_index,
		adj_nbr_rewrite_flag_t	flags,
		u8 *	rewrite
	)

adj_nbr_update_rewrite

Update the rewrite string for an existing adjacecny.

Update the adjacency's rewrite string. A NULL string implies the rewrite is reset (i.e. when ARP/ND entry is gone). NB: the adj being updated may be handling traffic in the DP.

Definition at line 340 of file adj_nbr.c.

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adj_nbr_update_rewrite_internal()

void adj_nbr_update_rewrite_internal	(	ip_adjacency_t *	adj,
		ip_lookup_next_t	adj_next_index,
		u32	this_node,
		u32	next_node,
		u8 *	rewrite
	)

adj_nbr_update_rewrite_internal

Update the adjacency's rewrite string. A NULL string implies the rewrite is reset (i.e. when ARP/ND entry is gone). NB: the adj being updated may be handling traffic in the DP.

Definition at line 382 of file adj_nbr.c.

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adj_nbr_walk()

void adj_nbr_walk	(	u32	sw_if_index,
		fib_protocol_t	adj_nh_proto,
		adj_walk_cb_t	cb,
		void *	ctx
	)

Walk all adjacencies on a link for a given next-hop protocol.

Walk the neighbour Adjacencies on a given interface.

Definition at line 592 of file adj_nbr.c.

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adj_nbr_walk_nh()

void adj_nbr_walk_nh	(	u32	sw_if_index,
		fib_protocol_t	adj_nh_proto,
		const ip46_address_t *	nh,
		adj_walk_cb_t	cb,
		void *	ctx
	)

Walk adjacencies on a link with a given next-hop.

Walk the neighbour Adjacencies on a given interface with a given next-hop.

that is visit the adjacencies with different link types.

Definition at line 684 of file adj_nbr.c.

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adj_nbr_walk_nh4()

void adj_nbr_walk_nh4	(	u32	sw_if_index,
		const ip4_address_t *	addr,
		adj_walk_cb_t	cb,
		void *	ctx
	)

Walk adjacencies on a link with a given v4 next-hop.

that is visit the adjacencies with different link types.

Definition at line 628 of file adj_nbr.c.

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adj_nbr_walk_nh6()

void adj_nbr_walk_nh6	(	u32	sw_if_index,
		const ip6_address_t *	addr,
		adj_walk_cb_t	cb,
		void *	ctx
	)

Walk adjacencies on a link with a given v6 next-hop.

that is visit the adjacencies with different link types.

Definition at line 656 of file adj_nbr.c.

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format_adj_nbr()

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

Format a neigbour (REWRITE) adjacency.

Definition at line 1066 of file adj_nbr.c.

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format_adj_nbr_incomplete()

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

Format aa incomplete neigbour (ARP) adjacency.

Definition at line 1047 of file adj_nbr.c.

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VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION_PRIO()

VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION_PRIO	(	adj_nbr_hw_interface_state_change	,
		VNET_ITF_FUNC_PRIORITY_HIGH
	)

VNET_SW_INTERFACE_ADD_DEL_FUNCTION()

VNET_SW_INTERFACE_ADD_DEL_FUNCTION

(

adj_nbr_interface_add_del

)

VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION_PRIO()

VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION_PRIO	(	adj_nbr_sw_interface_state_change	,
		VNET_ITF_FUNC_PRIORITY_HIGH
	)

Variable Documentation

adj_nbr_dpo_vft

const static dpo_vft_t adj_nbr_dpo_vft

static

Initial value:

= {
    .dv_lock = adj_dpo_lock,
    .dv_unlock = adj_dpo_unlock,
    .dv_format = format_adj_nbr,
    .dv_mem_show = adj_mem_show,
    .dv_get_urpf = adj_dpo_get_urpf,
    .dv_get_mtu = adj_dpo_get_mtu,
}

Definition at line 1103 of file adj_nbr.c.

adj_nbr_incompl_dpo_vft

const static dpo_vft_t adj_nbr_incompl_dpo_vft

static

Initial value:

= {
    .dv_lock = adj_dpo_lock,
    .dv_unlock = adj_dpo_unlock,
    .dv_format = format_adj_nbr_incomplete,
    .dv_get_urpf = adj_dpo_get_urpf,
    .dv_get_mtu = adj_dpo_get_mtu,
}

Definition at line 1111 of file adj_nbr.c.

adj_nbr_tables

uword** adj_nbr_tables[FIB_PROTOCOL_IP_MAX]

static

Definition at line 26 of file adj_nbr.c.

ip4_show_fib_command

vlib_cli_command_t ip4_show_fib_command

static

Initial value:

= {
    .path = "show adj nbr",
    .short_help = "show adj nbr [<adj_index>] [interface]",
    .function = adj_nbr_show,
}

(constructor) VLIB_CLI_COMMAND (ip4_show_fib_command)

Definition at line 1040 of file adj_nbr.c.

nbr_ethernet_nodes

const static char* const nbr_ethernet_nodes[]

static

Initial value:

=
{
    "adj-l2-rewrite",
    NULL,
}

Definition at line 1141 of file adj_nbr.c.

nbr_incomplete_ip4_nodes

const static char* const nbr_incomplete_ip4_nodes[]

static

Initial value:

=
{
    "ip4-arp",
    NULL,
}

Definition at line 1154 of file adj_nbr.c.

nbr_incomplete_ip6_nodes

const static char* const nbr_incomplete_ip6_nodes[]

static

Initial value:

=
{
    "ip6-discover-neighbor",
    NULL,
}

Definition at line 1159 of file adj_nbr.c.

nbr_incomplete_mpls_nodes

const static char* const nbr_incomplete_mpls_nodes[]

static

Initial value:

=
{
    "mpls-adj-incomplete",
    NULL,
}

Definition at line 1164 of file adj_nbr.c.

nbr_incomplete_nodes

const static char* const * const nbr_incomplete_nodes[DPO_PROTO_NUM]

static

Initial value:

=
{
    [DPO_PROTO_IP4]  = nbr_incomplete_ip4_nodes,
    [DPO_PROTO_IP6]  = nbr_incomplete_ip6_nodes,
    [DPO_PROTO_MPLS] = nbr_incomplete_mpls_nodes,
}

Definition at line 1170 of file adj_nbr.c.

nbr_ip4_nodes

const static char* const nbr_ip4_nodes[]

static

Initial value:

=
{
    "ip4-rewrite",
    NULL,
}

The per-protocol VLIB graph nodes that are assigned to an adjacency object.

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

Definition at line 1126 of file adj_nbr.c.

nbr_ip6_nodes

const static char* const nbr_ip6_nodes[]

static

Initial value:

=
{
    "ip6-rewrite",
    NULL,
}

Definition at line 1131 of file adj_nbr.c.

nbr_mpls_nodes

const static char* const nbr_mpls_nodes[]

static

Initial value:

=
{
    "mpls-output",
    NULL,
}

Definition at line 1136 of file adj_nbr.c.

nbr_nodes

const static char* const * const nbr_nodes[DPO_PROTO_NUM]

static

Initial value:

=
{
    [DPO_PROTO_IP4]  = nbr_ip4_nodes,
    [DPO_PROTO_IP6]  = nbr_ip6_nodes,
    [DPO_PROTO_MPLS] = nbr_mpls_nodes,
    [DPO_PROTO_ETHERNET] = nbr_ethernet_nodes,
}

Definition at line 1146 of file adj_nbr.c.