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Vector Packet Processing
l2_xcrw.c File Reference

General L2 / L3 cross-connect, used to set up "L2 interface <--> your-favorite-tunnel-encap" tunnels. More...

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Data Structures

struct  l2_xcrw_trace_t
 

Functions

static u8format_l2_xcrw_trace (u8 *s, va_list *args)
 
static uword l2_xcrw_node_fn (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
 
clib_error_tl2_xcrw_init (vlib_main_t *vm)
 
static uword dummy_interface_tx (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
 
static u8format_xcrw_name (u8 *s, va_list *args)
 
 VNET_DEVICE_CLASS (xcrw_device_class, static)
 
static u32 create_xcrw_interface (vlib_main_t *vm)
 
int vnet_configure_l2_xcrw (vlib_main_t *vm, vnet_main_t *vnm, u32 l2_sw_if_index, u32 tx_fib_index, u8 *rewrite, u32 next_node_index, int is_add)
 
static clib_error_tset_l2_xcrw_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
 
static u8format_l2xcrw (u8 *s, va_list *args)
 
static clib_error_tshow_l2xcrw_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
 

Variables

l2_xcrw_main_t l2_xcrw_main
 
static vlib_node_registration_t l2_xcrw_node
 (constructor) VLIB_REGISTER_NODE (l2_xcrw_node) More...
 
static char * l2_xcrw_error_strings []
 
static vlib_cli_command_t set_l2_xcrw_command
 (constructor) VLIB_CLI_COMMAND (set_l2_xcrw_command) More...
 
static vlib_cli_command_t show_l2xcrw_command
 (constructor) VLIB_CLI_COMMAND (show_l2xcrw_command) More...
 

Detailed Description

General L2 / L3 cross-connect, used to set up "L2 interface <--> your-favorite-tunnel-encap" tunnels.

We set up a typical L2 cross-connect or (future) bridge to hook L2 interface(s) up to the L3 stack in arbitrary ways.

Each l2_xcrw adjacency specifies 3 things:

  1. The next graph node (presumably in the L3 stack) to process the (L2 -> L3) packet
  2. A new value for vnet_buffer(b)->sw_if_indexVLIB_TX,
  3. A rewrite string to apply.

Example: to cross-connect an L2 interface or (future) bridge to an mpls-o-gre tunnel, set up the L2 rewrite string as shown in mpls_gre_rewrite, and use "mpls-post-rewrite" to fix the GRE IP header checksum and length fields.

Definition in file l2_xcrw.c.

Function Documentation

static u32 create_xcrw_interface ( vlib_main_t vm)
static

Definition at line 299 of file l2_xcrw.c.

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

Definition at line 275 of file l2_xcrw.c.

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static u8* format_l2_xcrw_trace ( u8 s,
va_list *  args 
)
static

Definition at line 49 of file l2_xcrw.c.

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static u8* format_l2xcrw ( u8 s,
va_list *  args 
)
static

Definition at line 517 of file l2_xcrw.c.

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

Definition at line 283 of file l2_xcrw.c.

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clib_error_t* l2_xcrw_init ( vlib_main_t vm)

Definition at line 261 of file l2_xcrw.c.

static uword l2_xcrw_node_fn ( vlib_main_t vm,
vlib_node_runtime_t node,
vlib_frame_t frame 
)
static

Definition at line 71 of file l2_xcrw.c.

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static clib_error_t* set_l2_xcrw_command_fn ( vlib_main_t vm,
unformat_input_t input,
vlib_cli_command_t cmd 
)
static

Definition at line 399 of file l2_xcrw.c.

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static clib_error_t* show_l2xcrw_command_fn ( vlib_main_t vm,
unformat_input_t input,
vlib_cli_command_t cmd 
)
static

Definition at line 561 of file l2_xcrw.c.

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int vnet_configure_l2_xcrw ( vlib_main_t vm,
vnet_main_t vnm,
u32  l2_sw_if_index,
u32  tx_fib_index,
u8 rewrite,
u32  next_node_index,
int  is_add 
)

Definition at line 329 of file l2_xcrw.c.

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VNET_DEVICE_CLASS ( xcrw_device_class  ,
static   
)

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Variable Documentation

char* l2_xcrw_error_strings[]
static
Initial value:
= {
#define _(sym,string)
}
#define foreach_l2_xcrw_error
Definition: l2_xcrw.h:71

Definition at line 64 of file l2_xcrw.c.

l2_xcrw_main_t l2_xcrw_main

Definition at line 60 of file l2_xcrw.c.

static vlib_node_registration_t l2_xcrw_node
static
Initial value:
= {
.function = l2_xcrw_node_fn,
.name = "l2-xcrw",
.vector_size = sizeof (u32),
.format_trace = format_l2_xcrw_trace,
.error_strings = l2_xcrw_error_strings,
.n_next_nodes = L2_XCRW_N_NEXT,
.next_nodes = {
[L2_XCRW_NEXT_DROP] = "error-drop",
},
}
static char * l2_xcrw_error_strings[]
Definition: l2_xcrw.c:64
static uword l2_xcrw_node_fn(vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
Definition: l2_xcrw.c:71
unsigned int u32
Definition: types.h:88
#define ARRAY_LEN(x)
Definition: clib.h:59
static u8 * format_l2_xcrw_trace(u8 *s, va_list *args)
Definition: l2_xcrw.c:49

(constructor) VLIB_REGISTER_NODE (l2_xcrw_node)

Definition at line 62 of file l2_xcrw.c.

vlib_cli_command_t set_l2_xcrw_command
static
Initial value:
= {
.path = "set interface l2 xcrw",
.short_help =
"set interface l2 xcrw <interface> next <node-name>\n"
" [del] [tx-fib-id <id>] [ipv6] rw <hex-bytes>",
}
static clib_error_t * set_l2_xcrw_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: l2_xcrw.c:399

(constructor) VLIB_CLI_COMMAND (set_l2_xcrw_command)

Definition at line 507 of file l2_xcrw.c.

vlib_cli_command_t show_l2xcrw_command
static
Initial value:
= {
.path = "show l2xcrw",
.short_help = "show l2xcrw",
}
static clib_error_t * show_l2xcrw_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: l2_xcrw.c:561

(constructor) VLIB_CLI_COMMAND (show_l2xcrw_command)

Definition at line 594 of file l2_xcrw.c.