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Vector Packet Processing
arp.c File Reference

IPv4 ARP. More...

+ Include dependency graph for arp.c:

Go to the source code of this file.

Data Structures

struct  ethernet_arp_ip4_entry_t
 
struct  ethernet_arp_interface_t_
 Per-interface ARP configuration and state. More...
 
struct  ethernet_proxy_arp_t
 
struct  pending_resolution_t
 
struct  ethernet_arp_main_t
 
struct  vnet_arp_set_ip4_over_ethernet_rpc_args_t
 
struct  ethernet_arp_input_trace_t
 
struct  pg_ethernet_arp_header_t
 

Macros

#define ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC   (1 << 0)
 
#define ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC   (1 << 1)
 
#define ETHERNET_ARP_ARGS_REMOVE   (1<<0)
 
#define ETHERNET_ARP_ARGS_FLUSH   (1<<1)
 
#define ETHERNET_ARP_ARGS_POPULATE   (1<<2)
 
#define foreach_ethernet_arp_error
 

Typedefs

typedef struct ethernet_arp_interface_t_ ethernet_arp_interface_t
 Per-interface ARP configuration and state. More...
 

Enumerations

enum  arp_input_next_t { ARP_INPUT_NEXT_DROP, ARP_INPUT_NEXT_REPLY_TX, ARP_INPUT_N_NEXT }
 
enum  ethernet_arp_input_error_t { ETHERNET_ARP_N_ERROR }
 
enum  arp_term_next_t { ARP_TERM_NEXT_L2_OUTPUT, ARP_TERM_NEXT_DROP, ARP_TERM_N_NEXT }
 

Functions

void vl_api_rpc_call_main_thread (void *fp, u8 *data, u32 data_length)
 
static void set_ip4_over_ethernet_rpc_callback (vnet_arp_set_ip4_over_ethernet_rpc_args_t *a)
 
static u8format_ethernet_arp_hardware_type (u8 *s, va_list *va)
 
static u8format_ethernet_arp_opcode (u8 *s, va_list *va)
 
static uword unformat_ethernet_arp_opcode_host_byte_order (unformat_input_t *input, va_list *args)
 
static uword unformat_ethernet_arp_opcode_net_byte_order (unformat_input_t *input, va_list *args)
 
static u8format_ethernet_arp_header (u8 *s, va_list *va)
 
static u8format_ethernet_arp_ip4_entry (u8 *s, va_list *va)
 
static u8format_ethernet_arp_input_trace (u8 *s, va_list *va)
 
static u8format_arp_term_input_trace (u8 *s, va_list *va)
 
static void arp_nbr_probe (ip_adjacency_t *adj)
 
static void arp_mk_complete (adj_index_t ai, ethernet_arp_ip4_entry_t *e)
 
static void arp_mk_incomplete (adj_index_t ai, ethernet_arp_ip4_entry_t *e)
 
static ethernet_arp_ip4_entry_tarp_entry_find (ethernet_arp_interface_t *eai, const ip4_address_t *addr)
 
static adj_walk_rc_t arp_mk_complete_walk (adj_index_t ai, void *ctx)
 
static adj_walk_rc_t arp_mk_incomplete_walk (adj_index_t ai, void *ctx)
 
void arp_update_adjacency (vnet_main_t *vnm, u32 sw_if_index, u32 ai)
 
int vnet_arp_set_ip4_over_ethernet_internal (vnet_main_t *vnm, vnet_arp_set_ip4_over_ethernet_rpc_args_t *args)
 
void vnet_register_ip4_arp_resolution_event (vnet_main_t *vnm, void *address_arg, uword node_index, uword type_opaque, uword data)
 
int vnet_add_del_ip4_arp_change_event (vnet_main_t *vnm, void *data_callback, u32 pid, void *address_arg, uword node_index, uword type_opaque, uword data, int is_add)
 
static void unset_random_arp_entry (void)
 
static void arp_unnumbered (vlib_buffer_t *p0, u32 pi0, ethernet_header_t *eth0, u32 sw_if_index)
 
static uword arp_input (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
 
static int ip4_arp_entry_sort (void *a1, void *a2)
 
static clib_error_tshow_ip4_arp (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
 
static void pg_ethernet_arp_header_init (pg_ethernet_arp_header_t *p)
 
uword unformat_pg_arp_header (unformat_input_t *input, va_list *args)
 
clib_error_tip4_set_arp_limit (u32 arp_limit)
 
int vnet_arp_unset_ip4_over_ethernet (vnet_main_t *vnm, u32 sw_if_index, void *a_arg)
 Control Plane hook to remove an ARP entry. More...
 
static int vnet_arp_flush_ip4_over_ethernet (vnet_main_t *vnm, u32 sw_if_index, void *a_arg)
 Internally generated event to flush the ARP cache on an interface state change event. More...
 
static int vnet_arp_populate_ip4_over_ethernet (vnet_main_t *vnm, u32 sw_if_index, void *a_arg)
 Internally generated event to populate the ARP cache on an interface state change event. More...
 
static void arp_add_del_interface_address (ip4_main_t *im, uword opaque, u32 sw_if_index, ip4_address_t *address, u32 address_length, u32 if_address_index, u32 is_del)
 
static clib_error_tethernet_arp_init (vlib_main_t *vm)
 
static void arp_entry_free (ethernet_arp_interface_t *eai, ethernet_arp_ip4_entry_t *e)
 
static int vnet_arp_unset_ip4_over_ethernet_internal (vnet_main_t *vnm, vnet_arp_set_ip4_over_ethernet_rpc_args_t *args)
 
static int vnet_arp_flush_ip4_over_ethernet_internal (vnet_main_t *vnm, vnet_arp_set_ip4_over_ethernet_rpc_args_t *args)
 
static int vnet_arp_populate_ip4_over_ethernet_internal (vnet_main_t *vnm, vnet_arp_set_ip4_over_ethernet_rpc_args_t *args)
 
static clib_error_tethernet_arp_sw_interface_up_down (vnet_main_t *vnm, u32 sw_if_index, u32 flags)
 Invoked when the interface's admin state changes. More...
 
 VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_arp_sw_interface_up_down)
 
static void increment_ip4_and_mac_address (ethernet_arp_ip4_over_ethernet_address_t *a)
 
int vnet_arp_set_ip4_over_ethernet (vnet_main_t *vnm, u32 sw_if_index, void *a_arg, int is_static)
 
int vnet_proxy_arp_add_del (ip4_address_t *lo_addr, ip4_address_t *hi_addr, u32 fib_index, int is_del)
 
int vnet_proxy_arp_fib_reset (u32 fib_id)
 
static clib_error_tip_arp_add_del_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
 
static clib_error_tset_int_proxy_arp_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
 
static uword arp_term_l2bd (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
 
clib_error_tarp_term_init (vlib_main_t *vm)
 
void change_arp_mac (u32 sw_if_index, ethernet_arp_ip4_entry_t *e)
 
void ethernet_arp_change_mac (vnet_main_t *vnm, u32 sw_if_index)
 

Variables

static ethernet_arp_main_t ethernet_arp_main
 
static char * ethernet_arp_error_strings []
 
static vlib_node_registration_t arp_input_node
 (constructor) VLIB_REGISTER_NODE (arp_input_node) More...
 
static vlib_cli_command_t show_ip4_arp_command
 (constructor) VLIB_CLI_COMMAND (show_ip4_arp_command) More...
 
static vlib_cli_command_t ip_arp_add_del_command
 (constructor) VLIB_CLI_COMMAND (ip_arp_add_del_command) More...
 
static vlib_cli_command_t set_int_proxy_enable_command
 (constructor) VLIB_CLI_COMMAND (set_int_proxy_enable_command) More...
 
u32 arp_term_next_node_index [32]
 
static vlib_node_registration_t arp_term_l2bd_node
 (constructor) VLIB_REGISTER_NODE (arp_term_l2bd_node) More...
 

Detailed Description

IPv4 ARP.

This file contains code to manage the IPv4 ARP tables (IP Address to MAC Address lookup).

Definition in file arp.c.

Macro Definition Documentation

#define ETHERNET_ARP_ARGS_FLUSH   (1<<1)

Definition at line 123 of file arp.c.

#define ETHERNET_ARP_ARGS_POPULATE   (1<<2)

Definition at line 124 of file arp.c.

#define ETHERNET_ARP_ARGS_REMOVE   (1<<0)

Definition at line 122 of file arp.c.

#define ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC   (1 << 1)

Definition at line 48 of file arp.c.

#define ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC   (1 << 0)

Definition at line 47 of file arp.c.

#define foreach_ethernet_arp_error
Value:
_ (replies_sent, "ARP replies sent") \
_ (l2_type_not_ethernet, "L2 type not ethernet") \
_ (l3_type_not_ip4, "L3 type not IP4") \
_ (l3_src_address_not_local, "IP4 source address not local to subnet") \
_ (l3_dst_address_not_local, "IP4 destination address not local to subnet") \
_ (l3_src_address_is_local, "IP4 source address matches local interface") \
_ (l3_src_address_learned, "ARP request IP4 source address learned") \
_ (replies_received, "ARP replies received") \
_ (opcode_not_request, "ARP opcode not request") \
_ (proxy_arp_replies_sent, "Proxy ARP replies sent") \
_ (l2_address_mismatch, "ARP hw addr does not match L2 frame src addr") \
_ (missing_interface_address, "ARP missing interface address") \
_ (gratuitous_arp, "ARP probe or announcement dropped") \
_ (interface_no_table, "Interface is not mapped to an IP table") \

Definition at line 759 of file arp.c.

Typedef Documentation

Per-interface ARP configuration and state.

Enumeration Type Documentation

Enumerator
ARP_INPUT_NEXT_DROP 
ARP_INPUT_NEXT_REPLY_TX 
ARP_INPUT_N_NEXT 

Definition at line 752 of file arp.c.

Enumerator
ARP_TERM_NEXT_L2_OUTPUT 
ARP_TERM_NEXT_DROP 
ARP_TERM_N_NEXT 

Definition at line 2070 of file arp.c.

Enumerator
ETHERNET_ARP_N_ERROR 

Definition at line 775 of file arp.c.

Function Documentation

static void arp_add_del_interface_address ( ip4_main_t im,
uword  opaque,
u32  sw_if_index,
ip4_address_t address,
u32  address_length,
u32  if_address_index,
u32  is_del 
)
static

Definition at line 1498 of file arp.c.

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static ethernet_arp_ip4_entry_t* arp_entry_find ( ethernet_arp_interface_t eai,
const ip4_address_t addr 
)
static

Definition at line 408 of file arp.c.

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static void arp_entry_free ( ethernet_arp_interface_t eai,
ethernet_arp_ip4_entry_t e 
)
static

Definition at line 1603 of file arp.c.

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static uword arp_input ( vlib_main_t vm,
vlib_node_runtime_t node,
vlib_frame_t frame 
)
static

Definition at line 960 of file arp.c.

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static void arp_mk_complete ( adj_index_t  ai,
ethernet_arp_ip4_entry_t e 
)
static

Definition at line 386 of file arp.c.

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static adj_walk_rc_t arp_mk_complete_walk ( adj_index_t  ai,
void *  ctx 
)
static

Definition at line 427 of file arp.c.

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static void arp_mk_incomplete ( adj_index_t  ai,
ethernet_arp_ip4_entry_t e 
)
static

Definition at line 396 of file arp.c.

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static adj_walk_rc_t arp_mk_incomplete_walk ( adj_index_t  ai,
void *  ctx 
)
static

Definition at line 437 of file arp.c.

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static void arp_nbr_probe ( ip_adjacency_t adj)
static

Definition at line 323 of file arp.c.

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clib_error_t* arp_term_init ( vlib_main_t vm)

Definition at line 2315 of file arp.c.

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static uword arp_term_l2bd ( vlib_main_t vm,
vlib_node_runtime_t node,
vlib_frame_t frame 
)
static

Definition at line 2080 of file arp.c.

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static void arp_unnumbered ( vlib_buffer_t p0,
u32  pi0,
ethernet_header_t eth0,
u32  sw_if_index 
)
static

Definition at line 816 of file arp.c.

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void arp_update_adjacency ( vnet_main_t vnm,
u32  sw_if_index,
u32  ai 
)

Definition at line 447 of file arp.c.

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void change_arp_mac ( u32  sw_if_index,
ethernet_arp_ip4_entry_t e 
)

Definition at line 2329 of file arp.c.

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void ethernet_arp_change_mac ( vnet_main_t vnm,
u32  sw_if_index 
)

Definition at line 2339 of file arp.c.

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static clib_error_t* ethernet_arp_init ( vlib_main_t vm)
static

Definition at line 1553 of file arp.c.

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

Invoked when the interface's admin state changes.

Definition at line 1710 of file arp.c.

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static u8* format_arp_term_input_trace ( u8 s,
va_list *  va 
)
static

Definition at line 306 of file arp.c.

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static u8* format_ethernet_arp_hardware_type ( u8 s,
va_list *  va 
)
static

Definition at line 132 of file arp.c.

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static u8* format_ethernet_arp_header ( u8 s,
va_list *  va 
)
static

Definition at line 209 of file arp.c.

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static u8* format_ethernet_arp_input_trace ( u8 s,
va_list *  va 
)
static

Definition at line 292 of file arp.c.

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static u8* format_ethernet_arp_ip4_entry ( u8 s,
va_list *  va 
)
static

Definition at line 256 of file arp.c.

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static u8* format_ethernet_arp_opcode ( u8 s,
va_list *  va 
)
static

Definition at line 150 of file arp.c.

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static void increment_ip4_and_mac_address ( ethernet_arp_ip4_over_ethernet_address_t *  a)
static

Definition at line 1752 of file arp.c.

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static int ip4_arp_entry_sort ( void *  a1,
void *  a2 
)
static

Definition at line 1267 of file arp.c.

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clib_error_t* ip4_set_arp_limit ( u32  arp_limit)

Definition at line 1420 of file arp.c.

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

Definition at line 1867 of file arp.c.

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static void pg_ethernet_arp_header_init ( pg_ethernet_arp_header_t p)
inlinestatic

Definition at line 1367 of file arp.c.

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

Definition at line 2000 of file arp.c.

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static void set_ip4_over_ethernet_rpc_callback ( vnet_arp_set_ip4_over_ethernet_rpc_args_t a)
static

Definition at line 1690 of file arp.c.

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static clib_error_t* show_ip4_arp ( vlib_main_t vm,
unformat_input_t input,
vlib_cli_command_t cmd 
)
static

Definition at line 1282 of file arp.c.

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static uword unformat_ethernet_arp_opcode_host_byte_order ( unformat_input_t input,
va_list *  args 
)
static

Definition at line 168 of file arp.c.

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static uword unformat_ethernet_arp_opcode_net_byte_order ( unformat_input_t input,
va_list *  args 
)
static

Definition at line 196 of file arp.c.

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uword unformat_pg_arp_header ( unformat_input_t input,
va_list *  args 
)

Definition at line 1384 of file arp.c.

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static void unset_random_arp_entry ( void  )
static

Definition at line 785 of file arp.c.

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void vl_api_rpc_call_main_thread ( void *  fp,
u8 data,
u32  data_length 
)

Definition at line 1364 of file memory_vlib.c.

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int vnet_add_del_ip4_arp_change_event ( vnet_main_t vnm,
void *  data_callback,
u32  pid,
void *  address_arg,
uword  node_index,
uword  type_opaque,
uword  data,
int  is_add 
)

Definition at line 670 of file arp.c.

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static int vnet_arp_flush_ip4_over_ethernet ( vnet_main_t vnm,
u32  sw_if_index,
void *  a_arg 
)
static

Internally generated event to flush the ARP cache on an interface state change event.

A flush will remove dynamic ARP entries, and for statics remove the MAC address from the corresponding adjacencies.

Definition at line 1454 of file arp.c.

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static int vnet_arp_flush_ip4_over_ethernet_internal ( vnet_main_t vnm,
vnet_arp_set_ip4_over_ethernet_rpc_args_t args 
)
static

Definition at line 1636 of file arp.c.

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static int vnet_arp_populate_ip4_over_ethernet ( vnet_main_t vnm,
u32  sw_if_index,
void *  a_arg 
)
static

Internally generated event to populate the ARP cache on an interface state change event.

For static entries this will re-source the adjacencies.

Parameters
sw_if_indexThe interface on which the ARP entires are acted

Definition at line 1477 of file arp.c.

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static int vnet_arp_populate_ip4_over_ethernet_internal ( vnet_main_t vnm,
vnet_arp_set_ip4_over_ethernet_rpc_args_t args 
)
static

Definition at line 1669 of file arp.c.

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int vnet_arp_set_ip4_over_ethernet ( vnet_main_t vnm,
u32  sw_if_index,
void *  a_arg,
int  is_static 
)

Definition at line 1775 of file arp.c.

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int vnet_arp_set_ip4_over_ethernet_internal ( vnet_main_t vnm,
vnet_arp_set_ip4_over_ethernet_rpc_args_t args 
)

Definition at line 491 of file arp.c.

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int vnet_arp_unset_ip4_over_ethernet ( vnet_main_t vnm,
u32  sw_if_index,
void *  a_arg 
)

Control Plane hook to remove an ARP entry.

Definition at line 1432 of file arp.c.

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static int vnet_arp_unset_ip4_over_ethernet_internal ( vnet_main_t vnm,
vnet_arp_set_ip4_over_ethernet_rpc_args_t args 
)
inlinestatic

Definition at line 1613 of file arp.c.

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int vnet_proxy_arp_add_del ( ip4_address_t lo_addr,
ip4_address_t hi_addr,
u32  fib_index,
int  is_del 
)

Definition at line 1792 of file arp.c.

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int vnet_proxy_arp_fib_reset ( u32  fib_id)

Definition at line 1833 of file arp.c.

void vnet_register_ip4_arp_resolution_event ( vnet_main_t vnm,
void *  address_arg,
uword  node_index,
uword  type_opaque,
uword  data 
)

Definition at line 639 of file arp.c.

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VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION ( ethernet_arp_sw_interface_up_down  )

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Variable Documentation

vlib_node_registration_t arp_input_node
static
Initial value:
=
{
.function = arp_input,
.name = "arp-input",
.vector_size = sizeof (u32),
.n_errors = ETHERNET_ARP_N_ERROR,
.error_strings = ethernet_arp_error_strings,
.n_next_nodes = ARP_INPUT_N_NEXT,
.next_nodes = {
[ARP_INPUT_NEXT_DROP] = "error-drop",
[ARP_INPUT_NEXT_REPLY_TX] = "interface-output",
},
.format_buffer = format_ethernet_arp_header,
}
static u8 * format_ethernet_arp_header(u8 *s, va_list *va)
Definition: arp.c:209
static uword arp_input(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: arp.c:960
static u8 * format_ethernet_arp_input_trace(u8 *s, va_list *va)
Definition: arp.c:292
static char * ethernet_arp_error_strings[]
Definition: arp.c:1242
unsigned int u32
Definition: types.h:88

(constructor) VLIB_REGISTER_NODE (arp_input_node)

Definition at line 1249 of file arp.c.

vlib_node_registration_t arp_term_l2bd_node
static
Initial value:
= {
.function = arp_term_l2bd,
.name = "arp-term-l2bd",
.vector_size = sizeof (u32),
.n_errors = ETHERNET_ARP_N_ERROR,
.error_strings = ethernet_arp_error_strings,
.n_next_nodes = ARP_TERM_N_NEXT,
.next_nodes = {
[ARP_TERM_NEXT_L2_OUTPUT] = "l2-output",
[ARP_TERM_NEXT_DROP] = "error-drop",
},
.format_buffer = format_ethernet_arp_header,
.format_trace = format_arp_term_input_trace,
}
static uword arp_term_l2bd(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: arp.c:2080
static u8 * format_ethernet_arp_header(u8 *s, va_list *va)
Definition: arp.c:209
static char * ethernet_arp_error_strings[]
Definition: arp.c:1242
unsigned int u32
Definition: types.h:88
static u8 * format_arp_term_input_trace(u8 *s, va_list *va)
Definition: arp.c:306

(constructor) VLIB_REGISTER_NODE (arp_term_l2bd_node)

Definition at line 2298 of file arp.c.

u32 arp_term_next_node_index[32]

Definition at line 2077 of file arp.c.

char* ethernet_arp_error_strings[]
static
Initial value:
= {
#define _(sym,string)
}
#define foreach_ethernet_arp_error
Definition: arp.c:759

Definition at line 1242 of file arp.c.

ethernet_arp_main_t ethernet_arp_main
static

Definition at line 114 of file arp.c.

vlib_cli_command_t ip_arp_add_del_command
static
Initial value:
= {
.path = "set ip arp",
.short_help =
"set ip arp [del] <intfc> <ip-address> <mac-address> [static] [count <count>] [fib-id <fib-id>] [proxy <lo-addr> - <hi-addr>]",
}
static clib_error_t * ip_arp_add_del_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: arp.c:1867

(constructor) VLIB_CLI_COMMAND (ip_arp_add_del_command)

Definition at line 1991 of file arp.c.

vlib_cli_command_t set_int_proxy_enable_command
static
Initial value:
= {
.path = "set interface proxy-arp",
.short_help =
"set interface proxy-arp <intfc> [enable|disable]",
}
static clib_error_t * set_int_proxy_arp_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: arp.c:2000

(constructor) VLIB_CLI_COMMAND (set_int_proxy_enable_command)

Definition at line 2057 of file arp.c.

vlib_cli_command_t show_ip4_arp_command
static
Initial value:
= {
.path = "show ip arp",
.function = show_ip4_arp,
.short_help = "show ip arp",
}
static clib_error_t * show_ip4_arp(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: arp.c:1282

(constructor) VLIB_CLI_COMMAND (show_ip4_arp_command)

Definition at line 1347 of file arp.c.