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Vector Packet Processing
l2_efp_filter.c File Reference

EFP-filter - Ethernet Flow Point Filter. More...

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Data Structures

struct  l2_efp_filter_main_t
 
struct  l2_efp_filter_trace_t
 

Macros

#define foreach_l2_efp_filter_error
 

Enumerations

enum  l2_efp_filter_error_t { L2_EFP_FILTER_N_ERROR }
 
enum  l2_efp_filter_next_t { L2_EFP_FILTER_NEXT_DROP, L2_EFP_FILTER_N_NEXT }
 

Functions

static u8format_l2_efp_filter_trace (u8 *s, va_list *args)
 
static_always_inline void extract_keys (vnet_main_t *vnet_main, u32 sw_if_index0, vlib_buffer_t *b0, u32 *port_sw_if_index0, u16 *first_ethertype0, u16 *outer_id0, u16 *inner_id0, u32 *match_flags0)
 Extract fields from the packet that will be used in interface classification. More...
 
static uword l2_efp_filter_node_fn (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
 
clib_error_tl2_efp_filter_init (vlib_main_t *vm)
 
void l2_efp_filter_configure (vnet_main_t *vnet_main, u32 sw_if_index, u8 enable)
 Enable/disable the EFP Filter check on the subinterface. More...
 
static clib_error_tint_l2_efp_filter (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
 Set subinterface egress efp filter enable/disable. More...
 

Variables

l2_efp_filter_main_t l2_efp_filter_main
 
static vlib_node_registration_t l2_efp_filter_node
 (constructor) VLIB_REGISTER_NODE (l2_efp_filter_node) More...
 
static char * l2_efp_filter_error_strings []
 
static vlib_cli_command_t int_l2_efp_filter_cli
 (constructor) VLIB_CLI_COMMAND (int_l2_efp_filter_cli) More...
 

Detailed Description

EFP-filter - Ethernet Flow Point Filter.

It is possible to transmit a packet out a subinterface with VLAN tags that are not compatible with that subinterface. In other words, if that packet arrived on the output port, it would not be classified as coming from the output subinterface. This can happen in various ways: through misconfiguration, by putting subinterfaces with different VLAN encaps in the same bridge-domain, etc. The EFP Filter Check detects such packets and drops them. It consists of two checks, one that verifies the packet prior to output VLAN tag rewrite and one that verifies the packet after VLAN tag rewrite.

Definition in file l2_efp_filter.c.

Macro Definition Documentation

◆ foreach_l2_efp_filter_error

#define foreach_l2_efp_filter_error
Value:
_(L2_EFP_FILTER, "L2 EFP filter packets") \
_(DROP, "L2 EFP filter post-rewrite drops")
DROP
Definition: error.def:41

Definition at line 87 of file l2_efp_filter.c.

Enumeration Type Documentation

◆ l2_efp_filter_error_t

Enumerator
L2_EFP_FILTER_N_ERROR 

Definition at line 91 of file l2_efp_filter.c.

◆ l2_efp_filter_next_t

Enumerator
L2_EFP_FILTER_NEXT_DROP 
L2_EFP_FILTER_N_NEXT 

Definition at line 105 of file l2_efp_filter.c.

Function Documentation

◆ extract_keys()

static_always_inline void extract_keys ( vnet_main_t vnet_main,
u32  sw_if_index0,
vlib_buffer_t b0,
u32 port_sw_if_index0,
u16 first_ethertype0,
u16 outer_id0,
u16 inner_id0,
u32 match_flags0 
)

Extract fields from the packet that will be used in interface classification.

Definition at line 117 of file l2_efp_filter.c.

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◆ format_l2_efp_filter_trace()

static u8* format_l2_efp_filter_trace ( u8 s,
va_list *  args 
)
static

Definition at line 66 of file l2_efp_filter.c.

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◆ int_l2_efp_filter()

static clib_error_t* int_l2_efp_filter ( vlib_main_t vm,
unformat_input_t input,
vlib_cli_command_t cmd 
)
static

Set subinterface egress efp filter enable/disable.

The CLI format is: set interface l2 efp-filter <interface> [disable]]

Definition at line 515 of file l2_efp_filter.c.

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◆ l2_efp_filter_configure()

void l2_efp_filter_configure ( vnet_main_t vnet_main,
u32  sw_if_index,
u8  enable 
)

Enable/disable the EFP Filter check on the subinterface.

Definition at line 502 of file l2_efp_filter.c.

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◆ l2_efp_filter_init()

clib_error_t* l2_efp_filter_init ( vlib_main_t vm)

Definition at line 480 of file l2_efp_filter.c.

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◆ l2_efp_filter_node_fn()

static uword l2_efp_filter_node_fn ( vlib_main_t vm,
vlib_node_runtime_t node,
vlib_frame_t frame 
)
static

Definition at line 173 of file l2_efp_filter.c.

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Variable Documentation

◆ int_l2_efp_filter_cli

vlib_cli_command_t int_l2_efp_filter_cli
static
Initial value:
= {
.path = "set interface l2 efp-filter",
.short_help = "set interface l2 efp-filter <interface> [disable]",
.function = int_l2_efp_filter,
}
static clib_error_t * int_l2_efp_filter(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Set subinterface egress efp filter enable/disable.

(constructor) VLIB_CLI_COMMAND (int_l2_efp_filter_cli)

Definition at line 558 of file l2_efp_filter.c.

◆ l2_efp_filter_error_strings

char* l2_efp_filter_error_strings[]
static
Initial value:
= {
#define _(sym,string)
}
#define foreach_l2_efp_filter_error
Definition: l2_efp_filter.c:87

Definition at line 99 of file l2_efp_filter.c.

◆ l2_efp_filter_main

l2_efp_filter_main_t l2_efp_filter_main

Definition at line 83 of file l2_efp_filter.c.

◆ l2_efp_filter_node

static vlib_node_registration_t l2_efp_filter_node
static
Initial value:
= {
.function = l2_efp_filter_node_fn,
.name = "l2-efp-filter",
.vector_size = sizeof (u32),
.format_trace = format_l2_efp_filter_trace,
.error_strings = l2_efp_filter_error_strings,
.n_next_nodes = L2_EFP_FILTER_N_NEXT,
.next_nodes = {
[L2_EFP_FILTER_NEXT_DROP] = "error-drop",
},
}
static u8 * format_l2_efp_filter_trace(u8 *s, va_list *args)
Definition: l2_efp_filter.c:66
unsigned int u32
Definition: types.h:88
static char * l2_efp_filter_error_strings[]
Definition: l2_efp_filter.c:99
#define ARRAY_LEN(x)
Definition: clib.h:62
static uword l2_efp_filter_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)

(constructor) VLIB_REGISTER_NODE (l2_efp_filter_node)

Definition at line 85 of file l2_efp_filter.c.