ip6_reassembly.c File Reference

IPv6 Reassembly. More...

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Data Structures
struct	ip6_reass_key_t
union	ip6_reass_val_t
union	ip6_reass_kv_t
struct	ip6_reass_t
struct	ip6_reass_per_thread_t
struct	ip6_reass_main_t
struct	ip6_reass_range_trace_t
struct	ip6_reass_trace_t
struct	ip6_rehash_cb_ctx
struct	ip6_reassembly_handoff_trace_t

Macros
#define	MSEC_PER_SEC   1000
#define	IP6_REASS_TIMEOUT_DEFAULT_MS   100
#define	IP6_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS   10000
#define	IP6_REASS_MAX_REASSEMBLIES_DEFAULT   1024
#define	IP6_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT   3
#define	IP6_REASS_HT_LOAD_FACTOR   (0.75)
#define	foreach_ip6_reassembly_handoff_error   _(CONGESTION_DROP, "congestion drop")

Enumerations
enum	ip6_reass_rc_t { IP6_REASS_RC_OK, IP6_REASS_RC_INTERNAL_ERROR, IP6_REASS_RC_TOO_MANY_FRAGMENTS, IP6_REASS_RC_NO_BUF }
enum	ip6_reass_next_t {   IP6_REASSEMBLY_NEXT_INPUT, IP6_REASSEMBLY_NEXT_DROP, IP6_REASSEMBLY_NEXT_ICMP_ERROR, IP6_REASSEMBLY_NEXT_HANDOFF,   IP6_REASSEMBLY_N_NEXT }
enum	ip6_reass_trace_operation_e {   RANGE_NEW, RANGE_OVERLAP, ICMP_ERROR_RT_EXCEEDED, ICMP_ERROR_FL_TOO_BIG,   ICMP_ERROR_FL_NOT_MULT_8, FINALIZE }
enum	ip6_reass_event_t { IP6_EVENT_CONFIG_CHANGED = 1 }
enum	ip6_reassembly_handoff_error_t { IP6_REASSEMBLY_HANDOFF_N_ERROR }

Functions
static u32	ip6_reass_buffer_get_data_offset (vlib_buffer_t *b)
static u16	ip6_reass_buffer_get_data_len (vlib_buffer_t *b)
static void	ip6_reass_trace_details (vlib_main_t *vm, u32 bi, ip6_reass_range_trace_t *trace)
static u8 *	format_ip6_reass_range_trace (u8 *s, va_list *args)
static u8 *	format_ip6_reass_trace (u8 *s, va_list *args)
static void	ip6_reass_add_trace (vlib_main_t *vm, vlib_node_runtime_t *node, ip6_reass_main_t *rm, ip6_reass_t *reass, u32 bi, ip6_reass_trace_operation_e action, u32 size_diff)
static void	ip6_reass_free (ip6_reass_main_t *rm, ip6_reass_per_thread_t *rt, ip6_reass_t *reass)
static void	ip6_reass_drop_all (vlib_main_t *vm, vlib_node_runtime_t *node, ip6_reass_main_t *rm, ip6_reass_t *reass)
static void	ip6_reass_on_timeout (vlib_main_t *vm, vlib_node_runtime_t *node, ip6_reass_main_t *rm, ip6_reass_t *reass, u32 *icmp_bi)
static ip6_reass_t *	ip6_reass_find_or_create (vlib_main_t *vm, vlib_node_runtime_t *node, ip6_reass_main_t *rm, ip6_reass_per_thread_t *rt, ip6_reass_kv_t *kv, u32 *icmp_bi, u8 *do_handoff)
static ip6_reass_rc_t	ip6_reass_finalize (vlib_main_t *vm, vlib_node_runtime_t *node, ip6_reass_main_t *rm, ip6_reass_per_thread_t *rt, ip6_reass_t *reass, u32 *bi0, u32 *next0, u32 *error0, bool is_custom_app)
static void	ip6_reass_insert_range_in_chain (vlib_main_t *vm, ip6_reass_main_t *rm, ip6_reass_per_thread_t *rt, ip6_reass_t *reass, u32 prev_range_bi, u32 new_next_bi)
static ip6_reass_rc_t	ip6_reass_update (vlib_main_t *vm, vlib_node_runtime_t *node, ip6_reass_main_t *rm, ip6_reass_per_thread_t *rt, ip6_reass_t *reass, u32 *bi0, u32 *next0, u32 *error0, ip6_frag_hdr_t *frag_hdr, bool is_custom_app)
static bool	ip6_reass_verify_upper_layer_present (vlib_node_runtime_t *node, vlib_buffer_t *b, ip6_frag_hdr_t *frag_hdr)
static bool	ip6_reass_verify_fragment_multiple_8 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_buffer_t *b, ip6_frag_hdr_t *frag_hdr)
static bool	ip6_reass_verify_packet_size_lt_64k (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_buffer_t *b, ip6_frag_hdr_t *frag_hdr)
static uword	ip6_reassembly_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, bool is_feature, bool is_custom_app)
VLIB_NODE_FN()	ip6_reass_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
VLIB_NODE_FN()	ip6_reass_node_feature (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	VNET_FEATURE_INIT (ip6_reassembly_feature, static)
static u32	ip6_reass_get_nbuckets ()
static void	ip6_rehash_cb (clib_bihash_kv_48_8_t *kv, void *_ctx)
static void	ip6_reass_set_params (u32 timeout_ms, u32 max_reassemblies, u32 max_reassembly_length, u32 expire_walk_interval_ms)
vnet_api_error_t	ip6_reass_set (u32 timeout_ms, u32 max_reassemblies, u32 max_reassembly_length, u32 expire_walk_interval_ms)
	set ip6 reassembly configuration More...
vnet_api_error_t	ip6_reass_get (u32 *timeout_ms, u32 *max_reassemblies, u32 *expire_walk_interval_ms)
	get ip6 reassembly configuration More...
static clib_error_t *	ip6_reass_init_function (vlib_main_t *vm)
static uword	ip6_reass_walk_expired (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *f)
static u8 *	format_ip6_reass_key (u8 *s, va_list *args)
static u8 *	format_ip6_reass (u8 *s, va_list *args)
static clib_error_t *	show_ip6_reass (vlib_main_t *vm, unformat_input_t *input, CLIB_UNUSED(vlib_cli_command_t *lmd))
vnet_api_error_t	ip6_reass_enable_disable (u32 sw_if_index, u8 enable_disable)
static u8 *	format_ip6_reassembly_handoff_trace (u8 *s, va_list *args)
static uword	ip6_reassembly_handoff_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, bool is_feature)
VLIB_NODE_FN()	ip6_reassembly_handoff_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
VLIB_NODE_FN()	ip6_reassembly_feature_handoff_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)

Variables
ip6_reass_main_t	ip6_reass_main
static char *	ip6_reassembly_error_strings []
vlib_node_registration_t	ip6_reass_node
	(constructor) VLIB_REGISTER_NODE (ip6_reass_node) More...
vlib_node_registration_t	ip6_reass_node_feature
	(constructor) VLIB_REGISTER_NODE (ip6_reass_node_feature) More...
static vlib_node_registration_t	ip6_reass_expire_node
	(constructor) VLIB_REGISTER_NODE (ip6_reass_expire_node) More...
static vlib_cli_command_t	show_ip6_reassembly_cmd
	(constructor) VLIB_CLI_COMMAND (show_ip6_reassembly_cmd) More...
static char *	ip6_reassembly_handoff_error_strings []
vlib_node_registration_t	ip6_reassembly_handoff_node
	(constructor) VLIB_REGISTER_NODE (ip6_reassembly_handoff_node) More...
vlib_node_registration_t	ip6_reassembly_feature_handoff_node
	(constructor) VLIB_REGISTER_NODE (ip6_reassembly_feature_handoff_node) More...

Detailed Description

IPv6 Reassembly.

This file contains the source code for IPv6 reassembly.

Definition in file ip6_reassembly.c.

Macro Definition Documentation

#define foreach_ip6_reassembly_handoff_error   _(CONGESTION_DROP, "congestion drop")

Definition at line 1564 of file ip6_reassembly.c.

#define IP6_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS   10000

Definition at line 31 of file ip6_reassembly.c.

#define IP6_REASS_HT_LOAD_FACTOR   (0.75)

Definition at line 34 of file ip6_reassembly.c.

#define IP6_REASS_MAX_REASSEMBLIES_DEFAULT   1024

Definition at line 32 of file ip6_reassembly.c.

#define IP6_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT   3

Definition at line 33 of file ip6_reassembly.c.

#define IP6_REASS_TIMEOUT_DEFAULT_MS   100

Definition at line 30 of file ip6_reassembly.c.

#define MSEC_PER_SEC   1000

Definition at line 29 of file ip6_reassembly.c.

Enumeration Type Documentation

enum ip6_reass_event_t

Enumerator
IP6_EVENT_CONFIG_CHANGED

Definition at line 1209 of file ip6_reassembly.c.

enum ip6_reass_next_t

Enumerator
IP6_REASSEMBLY_NEXT_INPUT
IP6_REASSEMBLY_NEXT_DROP
IP6_REASSEMBLY_NEXT_ICMP_ERROR
IP6_REASSEMBLY_NEXT_HANDOFF
IP6_REASSEMBLY_N_NEXT

Definition at line 169 of file ip6_reassembly.c.

enum ip6_reass_rc_t

Enumerator
IP6_REASS_RC_OK
IP6_REASS_RC_INTERNAL_ERROR
IP6_REASS_RC_TOO_MANY_FRAGMENTS
IP6_REASS_RC_NO_BUF

Definition at line 36 of file ip6_reassembly.c.

enum ip6_reass_trace_operation_e

Enumerator
RANGE_NEW
RANGE_OVERLAP
ICMP_ERROR_RT_EXCEEDED
ICMP_ERROR_FL_TOO_BIG
ICMP_ERROR_FL_NOT_MULT_8
FINALIZE

Definition at line 178 of file ip6_reassembly.c.

enum ip6_reassembly_handoff_error_t

Enumerator
IP6_REASSEMBLY_HANDOFF_N_ERROR

Definition at line 1568 of file ip6_reassembly.c.

Function Documentation

static u8* format_ip6_reass ( u8 *  s, va_list *  args  )

static

Definition at line 1467 of file ip6_reassembly.c.

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static u8* format_ip6_reass_key ( u8 *  s, va_list *  args  )

static

Definition at line 1457 of file ip6_reassembly.c.

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static u8* format_ip6_reass_range_trace ( u8 *  s, va_list *  args  )

static

Definition at line 224 of file ip6_reassembly.c.

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static u8* format_ip6_reass_trace ( u8 *  s, va_list *  args  )

static

Definition at line 234 of file ip6_reassembly.c.

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static u8* format_ip6_reassembly_handoff_trace ( u8 *  s, va_list *  args  )

static

Definition at line 1588 of file ip6_reassembly.c.

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static void ip6_reass_add_trace ( vlib_main_t *  vm, vlib_node_runtime_t *  node, ip6_reass_main_t *  rm, ip6_reass_t *  reass, u32  bi, ip6_reass_trace_operation_e  action, u32  size_diff  )

static

Definition at line 276 of file ip6_reassembly.c.

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static u16 ip6_reass_buffer_get_data_len ( vlib_buffer_t *  b )

inlinestatic

Definition at line 90 of file ip6_reassembly.c.

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static u32 ip6_reass_buffer_get_data_offset ( vlib_buffer_t *  b )

inlinestatic

Definition at line 83 of file ip6_reassembly.c.

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static void ip6_reass_drop_all ( vlib_main_t *  vm, vlib_node_runtime_t *  node, ip6_reass_main_t *  rm, ip6_reass_t *  reass  )

inlinestatic

Definition at line 320 of file ip6_reassembly.c.

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vnet_api_error_t ip6_reass_enable_disable	(	u32	sw_if_index,
		u8	enable_disable
	)

Definition at line 1557 of file ip6_reassembly.c.

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static ip6_reass_rc_t ip6_reass_finalize ( vlib_main_t *  vm, vlib_node_runtime_t *  node, ip6_reass_main_t *  rm, ip6_reass_per_thread_t *  rt, ip6_reass_t *  reass, u32 *  bi0, u32 *  next0, u32 *  error0, bool  is_custom_app  )

inlinestatic

Definition at line 494 of file ip6_reassembly.c.

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static ip6_reass_t* ip6_reass_find_or_create ( vlib_main_t *  vm, vlib_node_runtime_t *  node, ip6_reass_main_t *  rm, ip6_reass_per_thread_t *  rt, ip6_reass_kv_t *  kv, u32 *  icmp_bi, u8 *  do_handoff  )

inlinestatic

Definition at line 424 of file ip6_reassembly.c.

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static void ip6_reass_free ( ip6_reass_main_t *  rm, ip6_reass_per_thread_t *  rt, ip6_reass_t *  reass  )

inlinestatic

Definition at line 304 of file ip6_reassembly.c.

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vnet_api_error_t ip6_reass_get	(	u32 *	timeout_ms,
		u32 *	max_reassemblies,
		u32 *	expire_walk_interval_ms
	)

get ip6 reassembly configuration

Definition at line 1281 of file ip6_reassembly.c.

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static u32 ip6_reass_get_nbuckets ( )

static

Definition at line 1192 of file ip6_reassembly.c.

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static clib_error_t* ip6_reass_init_function ( vlib_main_t *  vm )

static

Definition at line 1291 of file ip6_reassembly.c.

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static void ip6_reass_insert_range_in_chain ( vlib_main_t *  vm, ip6_reass_main_t *  rm, ip6_reass_per_thread_t *  rt, ip6_reass_t *  reass, u32  prev_range_bi, u32  new_next_bi  )

inlinestatic

Definition at line 718 of file ip6_reassembly.c.

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VLIB_NODE_FN() ip6_reass_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 1129 of file ip6_reassembly.c.

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VLIB_NODE_FN() ip6_reass_node_feature	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 1154 of file ip6_reassembly.c.

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static void ip6_reass_on_timeout ( vlib_main_t *  vm, vlib_node_runtime_t *  node, ip6_reass_main_t *  rm, ip6_reass_t *  reass, u32 *  icmp_bi  )

inlinestatic

Definition at line 385 of file ip6_reassembly.c.

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vnet_api_error_t ip6_reass_set	(	u32	timeout_ms,
		u32	max_reassemblies,
		u32	max_reassembly_length,
		u32	expire_walk_interval_ms
	)

set ip6 reassembly configuration

Definition at line 1243 of file ip6_reassembly.c.

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static void ip6_reass_set_params ( u32  timeout_ms, u32  max_reassemblies, u32  max_reassembly_length, u32  expire_walk_interval_ms  )

static

Definition at line 1232 of file ip6_reassembly.c.

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static void ip6_reass_trace_details ( vlib_main_t *  vm, u32  bi, ip6_reass_range_trace_t *  trace  )

static

Definition at line 211 of file ip6_reassembly.c.

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static ip6_reass_rc_t ip6_reass_update ( vlib_main_t *  vm, vlib_node_runtime_t *  node, ip6_reass_main_t *  rm, ip6_reass_per_thread_t *  rt, ip6_reass_t *  reass, u32 *  bi0, u32 *  next0, u32 *  error0, ip6_frag_hdr_t *  frag_hdr, bool  is_custom_app  )

inlinestatic

Definition at line 745 of file ip6_reassembly.c.

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static bool ip6_reass_verify_fragment_multiple_8 ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_buffer_t *  b, ip6_frag_hdr_t *  frag_hdr  )

inlinestatic

Definition at line 904 of file ip6_reassembly.c.

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static bool ip6_reass_verify_packet_size_lt_64k ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_buffer_t *  b, ip6_frag_hdr_t *  frag_hdr  )

inlinestatic

Definition at line 926 of file ip6_reassembly.c.

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static bool ip6_reass_verify_upper_layer_present ( vlib_node_runtime_t *  node, vlib_buffer_t *  b, ip6_frag_hdr_t *  frag_hdr  )

inlinestatic

Definition at line 882 of file ip6_reassembly.c.

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static uword ip6_reass_walk_expired ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  f  )

static

Definition at line 1344 of file ip6_reassembly.c.

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VLIB_NODE_FN() ip6_reassembly_feature_handoff_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 1677 of file ip6_reassembly.c.

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static uword ip6_reassembly_handoff_inline ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame, bool  is_feature  )

inlinestatic

Definition at line 1603 of file ip6_reassembly.c.

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VLIB_NODE_FN() ip6_reassembly_handoff_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 1653 of file ip6_reassembly.c.

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static uword ip6_reassembly_inline ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame, bool  is_feature, bool  is_custom_app  )

inlinestatic

Definition at line 949 of file ip6_reassembly.c.

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static void ip6_rehash_cb ( clib_bihash_kv_48_8_t *  kv, void *  _ctx  )

static

Definition at line 1222 of file ip6_reassembly.c.

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static clib_error_t* show_ip6_reass ( vlib_main_t *  vm, unformat_input_t *  input, CLIB_UNUSED(vlib_cli_command_t *lmd)    )

static

Definition at line 1503 of file ip6_reassembly.c.

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VNET_FEATURE_INIT	(	ip6_reassembly_feature	,
		static
	)

Variable Documentation

vlib_node_registration_t ip6_reass_expire_node

static

Initial value:

= {
    .function = ip6_reass_walk_expired,
    .format_trace = format_ip6_reass_trace,
    .type = VLIB_NODE_TYPE_PROCESS,
    .name = "ip6-reassembly-expire-walk",

    .n_errors = ARRAY_LEN (ip6_reassembly_error_strings),
    .error_strings = ip6_reassembly_error_strings,

}

(constructor) VLIB_REGISTER_NODE (ip6_reass_expire_node)

Definition at line 1444 of file ip6_reassembly.c.

ip6_reass_main_t ip6_reass_main

Definition at line 166 of file ip6_reassembly.c.

vlib_node_registration_t ip6_reass_node

Initial value:

= {
    .name = "ip6-reassembly",
    .vector_size = sizeof (u32),
    .format_trace = format_ip6_reass_trace,
    .n_errors = ARRAY_LEN (ip6_reassembly_error_strings),
    .error_strings = ip6_reassembly_error_strings,
    .n_next_nodes = IP6_REASSEMBLY_N_NEXT,
    .next_nodes =
        {
                [IP6_REASSEMBLY_NEXT_INPUT] = "ip6-input",
                [IP6_REASSEMBLY_NEXT_DROP] = "ip6-drop",
                [IP6_REASSEMBLY_NEXT_ICMP_ERROR] = "ip6-icmp-error",
                [IP6_REASSEMBLY_NEXT_HANDOFF] = "ip6-reassembly-handoff",
        },
}

(constructor) VLIB_REGISTER_NODE (ip6_reass_node)

Definition at line 1137 of file ip6_reassembly.c.

vlib_node_registration_t ip6_reass_node_feature

Initial value:

= {
    .name = "ip6-reassembly-feature",
    .vector_size = sizeof (u32),
    .format_trace = format_ip6_reass_trace,
    .n_errors = ARRAY_LEN (ip6_reassembly_error_strings),
    .error_strings = ip6_reassembly_error_strings,
    .n_next_nodes = IP6_REASSEMBLY_N_NEXT,
    .next_nodes =
        {
                [IP6_REASSEMBLY_NEXT_INPUT] = "ip6-input",
                [IP6_REASSEMBLY_NEXT_DROP] = "ip6-drop",
                [IP6_REASSEMBLY_NEXT_ICMP_ERROR] = "ip6-icmp-error",
                [IP6_REASSEMBLY_NEXT_HANDOFF] = "ip6-reass-feature-hoff",
        },
}

(constructor) VLIB_REGISTER_NODE (ip6_reass_node_feature)

Definition at line 1163 of file ip6_reassembly.c.

char* ip6_reassembly_error_strings[]

static

Initial value:

= {
#define _(sym, string) 
  foreach_ip6_error

}

Definition at line 1123 of file ip6_reassembly.c.

vlib_node_registration_t ip6_reassembly_feature_handoff_node

Initial value:

= {
  .name = "ip6-reass-feature-hoff",
  .vector_size = sizeof (u32),
  .n_errors = ARRAY_LEN(ip6_reassembly_handoff_error_strings),
  .error_strings = ip6_reassembly_handoff_error_strings,
  .format_trace = format_ip6_reassembly_handoff_trace,

  .n_next_nodes = 1,

  .next_nodes = {
    [0] = "error-drop",
  },
}

(constructor) VLIB_REGISTER_NODE (ip6_reassembly_feature_handoff_node)

Definition at line 1685 of file ip6_reassembly.c.

char* ip6_reassembly_handoff_error_strings[]

static

Initial value:

= {
#define _(sym,string) 
  foreach_ip6_reassembly_handoff_error

}

Definition at line 1576 of file ip6_reassembly.c.

vlib_node_registration_t ip6_reassembly_handoff_node

Initial value:

= {
  .name = "ip6-reassembly-handoff",
  .vector_size = sizeof (u32),
  .n_errors = ARRAY_LEN(ip6_reassembly_handoff_error_strings),
  .error_strings = ip6_reassembly_handoff_error_strings,
  .format_trace = format_ip6_reassembly_handoff_trace,

  .n_next_nodes = 1,

  .next_nodes = {
    [0] = "error-drop",
  },
}

(constructor) VLIB_REGISTER_NODE (ip6_reassembly_handoff_node)

Definition at line 1662 of file ip6_reassembly.c.

vlib_cli_command_t show_ip6_reassembly_cmd

static

Initial value:

= {
    .path = "show ip6-reassembly",
    .short_help = "show ip6-reassembly [details]",
    .function = show_ip6_reass,
}

(constructor) VLIB_CLI_COMMAND (show_ip6_reassembly_cmd)

Definition at line 1548 of file ip6_reassembly.c.