nat64_in2out.c File Reference

NAT64 IPv6 to IPv4 translation (inside to outside network) More...

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Data Structures
struct	nat64_in2out_trace_t
struct	nat64_in2out_set_ctx_t_
struct	unk_proto_st_walk_ctx_t_
struct	nat64_in2out_frag_set_ctx_t_
struct	nat64_in2out_handoff_trace_t

Macros
#define	foreach_nat64_in2out_error
#define	foreach_nat64_in2out_handoff_error

Typedefs
typedef struct nat64_in2out_set_ctx_t_	nat64_in2out_set_ctx_t
typedef struct unk_proto_st_walk_ctx_t_	unk_proto_st_walk_ctx_t
typedef struct nat64_in2out_frag_set_ctx_t_	nat64_in2out_frag_set_ctx_t

Enumerations
enum	nat64_in2out_error_t { NAT64_IN2OUT_N_ERROR }
enum	nat64_in2out_next_t {   NAT64_IN2OUT_NEXT_IP4_LOOKUP, NAT64_IN2OUT_NEXT_IP6_LOOKUP, NAT64_IN2OUT_NEXT_DROP, NAT64_IN2OUT_NEXT_SLOWPATH,   NAT64_IN2OUT_N_NEXT }
enum	nat64_in2out_handoff_error_t { NAT64_IN2OUT_HANDOFF_N_ERROR }

Functions
static u8 *	format_nat64_in2out_trace (u8 *s, va_list *args)
static u8	nat64_not_translate (u32 sw_if_index, ip6_address_t ip6_addr)
static_always_inline int	is_hairpinning (ip6_address_t *dst_addr)
	Check whether is a hairpinning. More...
static int	nat64_in2out_tcp_udp (vlib_main_t *vm, vlib_buffer_t *p, u16 l4_offset, u16 frag_hdr_offset, nat64_in2out_set_ctx_t *ctx)
static int	nat64_in2out_icmp_set_cb (ip6_header_t *ip6, ip4_header_t *ip4, void *arg)
static int	nat64_in2out_inner_icmp_set_cb (ip6_header_t *ip6, ip4_header_t *ip4, void *arg)
static int	unk_proto_st_walk (nat64_db_st_entry_t *ste, void *arg)
static int	nat64_in2out_unk_proto (vlib_main_t *vm, vlib_buffer_t *p, u8 l4_protocol, u16 l4_offset, u16 frag_hdr_offset, nat64_in2out_set_ctx_t *s_ctx)
static int	nat64_in2out_tcp_udp_hairpinning (vlib_main_t *vm, vlib_buffer_t *b, ip6_header_t *ip6, u32 l4_offset, u32 thread_index)
static int	nat64_in2out_icmp_hairpinning (vlib_main_t *vm, vlib_buffer_t *b, ip6_header_t *ip6, u32 thread_index)
static int	nat64_in2out_unk_proto_hairpinning (vlib_main_t *vm, vlib_buffer_t *b, ip6_header_t *ip6, u32 thread_index)
static uword	nat64_in2out_node_fn_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, u8 is_slow_path)
VLIB_NODE_FN()	nat64_in2out_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
VLIB_NODE_FN()	nat64_in2out_slowpath_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
static u8 *	format_nat64_in2out_handoff_trace (u8 *s, va_list *args)
VLIB_NODE_FN()	nat64_in2out_handoff_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)

Variables
static char *	nat64_in2out_error_strings []
vlib_node_registration_t	nat64_in2out_node
	(constructor) VLIB_REGISTER_NODE (nat64_in2out_node) More...
vlib_node_registration_t	nat64_in2out_slowpath_node
	(constructor) VLIB_REGISTER_NODE (nat64_in2out_slowpath_node) More...
static char *	nat64_in2out_handoff_error_strings []
vlib_node_registration_t	nat64_in2out_handoff_node
	(constructor) VLIB_REGISTER_NODE (nat64_in2out_handoff_node) More...

Detailed Description

NAT64 IPv6 to IPv4 translation (inside to outside network)

Definition in file nat64_in2out.c.

Macro Definition Documentation

foreach_nat64_in2out_error

#define foreach_nat64_in2out_error

Value:

_(UNSUPPORTED_PROTOCOL, "unsupported protocol")          \
_(IN2OUT_PACKETS, "good in2out packets processed")       \
_(NO_TRANSLATION, "no translation")                      \
_(UNKNOWN, "unknown")                                    \
_(DROP_FRAGMENT, "drop fragment")                        \
_(TCP_PACKETS, "TCP packets")                            \
_(UDP_PACKETS, "UDP packets")                            \
_(ICMP_PACKETS, "ICMP packets")                          \
_(OTHER_PACKETS, "other protocol packets")               \
_(FRAGMENTS, "fragments")                                \
_(CACHED_FRAGMENTS, "cached fragments")                  \
_(PROCESSED_FRAGMENTS, "processed fragments")

Definition at line 49 of file nat64_in2out.c.

foreach_nat64_in2out_handoff_error

#define foreach_nat64_in2out_handoff_error

Value:

_(CONGESTION_DROP, "congestion drop")                            \
_(SAME_WORKER, "same worker")                                    \
_(DO_HANDOFF, "do handoff")

Definition at line 1310 of file nat64_in2out.c.

Typedef Documentation

nat64_in2out_frag_set_ctx_t

typedef struct nat64_in2out_frag_set_ctx_t_ nat64_in2out_frag_set_ctx_t

nat64_in2out_set_ctx_t

typedef struct nat64_in2out_set_ctx_t_ nat64_in2out_set_ctx_t

unk_proto_st_walk_ctx_t

typedef struct unk_proto_st_walk_ctx_t_ unk_proto_st_walk_ctx_t

Enumeration Type Documentation

nat64_in2out_error_t

enum nat64_in2out_error_t

Enumerator
NAT64_IN2OUT_N_ERROR

Definition at line 64 of file nat64_in2out.c.

nat64_in2out_handoff_error_t

enum nat64_in2out_handoff_error_t

Enumerator
NAT64_IN2OUT_HANDOFF_N_ERROR

Definition at line 1315 of file nat64_in2out.c.

nat64_in2out_next_t

enum nat64_in2out_next_t

Enumerator
NAT64_IN2OUT_NEXT_IP4_LOOKUP
NAT64_IN2OUT_NEXT_IP6_LOOKUP
NAT64_IN2OUT_NEXT_DROP
NAT64_IN2OUT_NEXT_SLOWPATH
NAT64_IN2OUT_N_NEXT

Definition at line 78 of file nat64_in2out.c.

Function Documentation

format_nat64_in2out_handoff_trace()

static u8* format_nat64_in2out_handoff_trace ( u8 *  s, va_list *  args  )

static

Definition at line 1335 of file nat64_in2out.c.

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format_nat64_in2out_trace()

static u8* format_nat64_in2out_trace ( u8 *  s, va_list *  args  )

static

Definition at line 33 of file nat64_in2out.c.

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is_hairpinning()

static_always_inline int is_hairpinning

(

ip6_address_t *

dst_addr

)

Check whether is a hairpinning.

If the destination IP address of the packet is an IPv4 address assigned to the NAT64 itself, then the packet is a hairpin packet.

param dst_addr Destination address of the packet.

Returns

1 if hairpinning, otherwise 0.

Definition at line 125 of file nat64_in2out.c.

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nat64_in2out_handoff_node()

VLIB_NODE_FN() nat64_in2out_handoff_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 1348 of file nat64_in2out.c.

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nat64_in2out_icmp_hairpinning()

static int nat64_in2out_icmp_hairpinning ( vlib_main_t *  vm, vlib_buffer_t *  b, ip6_header_t *  ip6, u32  thread_index  )

static

Definition at line 794 of file nat64_in2out.c.

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nat64_in2out_icmp_set_cb()

static int nat64_in2out_icmp_set_cb ( ip6_header_t *  ip6, ip4_header_t *  ip4, void *  arg  )

static

Definition at line 292 of file nat64_in2out.c.

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nat64_in2out_inner_icmp_set_cb()

static int nat64_in2out_inner_icmp_set_cb ( ip6_header_t *  ip6, ip4_header_t *  ip4, void *  arg  )

static

Definition at line 385 of file nat64_in2out.c.

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nat64_in2out_node()

VLIB_NODE_FN() nat64_in2out_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 1247 of file nat64_in2out.c.

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nat64_in2out_node_fn_inline()

static uword nat64_in2out_node_fn_inline ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame, u8  is_slow_path  )

inlinestatic

Definition at line 1042 of file nat64_in2out.c.

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nat64_in2out_slowpath_node()

VLIB_NODE_FN() nat64_in2out_slowpath_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 1273 of file nat64_in2out.c.

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nat64_in2out_tcp_udp()

static int nat64_in2out_tcp_udp ( vlib_main_t *  vm, vlib_buffer_t *  p, u16  l4_offset, u16  frag_hdr_offset, nat64_in2out_set_ctx_t *  ctx  )

static

Definition at line 140 of file nat64_in2out.c.

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nat64_in2out_tcp_udp_hairpinning()

static int nat64_in2out_tcp_udp_hairpinning ( vlib_main_t *  vm, vlib_buffer_t *  b, ip6_header_t *  ip6, u32  l4_offset, u32  thread_index  )

static

Definition at line 660 of file nat64_in2out.c.

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nat64_in2out_unk_proto()

static int nat64_in2out_unk_proto ( vlib_main_t *  vm, vlib_buffer_t *  p, u8  l4_protocol, u16  l4_offset, u16  frag_hdr_offset, nat64_in2out_set_ctx_t *  s_ctx  )

static

Definition at line 513 of file nat64_in2out.c.

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nat64_in2out_unk_proto_hairpinning()

static int nat64_in2out_unk_proto_hairpinning ( vlib_main_t *  vm, vlib_buffer_t *  b, ip6_header_t *  ip6, u32  thread_index  )

static

Definition at line 920 of file nat64_in2out.c.

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nat64_not_translate()

static u8 nat64_not_translate ( u32  sw_if_index, ip6_address_t  ip6_addr  )

inlinestatic

Definition at line 95 of file nat64_in2out.c.

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unk_proto_st_walk()

static int unk_proto_st_walk ( nat64_db_st_entry_t *  ste, void *  arg  )

static

Definition at line 478 of file nat64_in2out.c.

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Variable Documentation

nat64_in2out_error_strings

char* nat64_in2out_error_strings[]

static

Initial value:

= {
#define _(sym,string) 
  foreach_nat64_in2out_error

}

Definition at line 72 of file nat64_in2out.c.

nat64_in2out_handoff_error_strings

char* nat64_in2out_handoff_error_strings[]

static

Initial value:

= {
#define _(sym,string) 
  foreach_nat64_in2out_handoff_error

}

Definition at line 1323 of file nat64_in2out.c.

nat64_in2out_handoff_node

vlib_node_registration_t nat64_in2out_handoff_node

Initial value:

= {
  .name = "nat64-in2out-handoff",
  .vector_size = sizeof (u32),
  .format_trace = format_nat64_in2out_handoff_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN(nat64_in2out_handoff_error_strings),
  .error_strings = nat64_in2out_handoff_error_strings,

  .n_next_nodes = 1,

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

(constructor) VLIB_REGISTER_NODE (nat64_in2out_handoff_node)

Definition at line 1414 of file nat64_in2out.c.

nat64_in2out_node

vlib_node_registration_t nat64_in2out_node

Initial value:

= {
  .name = "nat64-in2out",
  .vector_size = sizeof (u32),
  .format_trace = format_nat64_in2out_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN (nat64_in2out_error_strings),
  .error_strings = nat64_in2out_error_strings,
  .n_next_nodes = NAT64_IN2OUT_N_NEXT,
  
  .next_nodes = {
    [NAT64_IN2OUT_NEXT_DROP] = "error-drop",
    [NAT64_IN2OUT_NEXT_IP4_LOOKUP] = "ip4-lookup",
    [NAT64_IN2OUT_NEXT_IP6_LOOKUP] = "ip6-lookup",
    [NAT64_IN2OUT_NEXT_SLOWPATH] = "nat64-in2out-slowpath",
  },
}

(constructor) VLIB_REGISTER_NODE (nat64_in2out_node)

Definition at line 1255 of file nat64_in2out.c.

nat64_in2out_slowpath_node

vlib_node_registration_t nat64_in2out_slowpath_node

Initial value:

= {
  .name = "nat64-in2out-slowpath",
  .vector_size = sizeof (u32),
  .format_trace = format_nat64_in2out_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = ARRAY_LEN (nat64_in2out_error_strings),
  .error_strings = nat64_in2out_error_strings,
  .n_next_nodes = NAT64_IN2OUT_N_NEXT,
  
  .next_nodes = {
    [NAT64_IN2OUT_NEXT_DROP] = "error-drop",
    [NAT64_IN2OUT_NEXT_IP4_LOOKUP] = "ip4-lookup",
    [NAT64_IN2OUT_NEXT_IP6_LOOKUP] = "ip6-lookup",
    [NAT64_IN2OUT_NEXT_SLOWPATH] = "nat64-in2out-slowpath",
  },
}

(constructor) VLIB_REGISTER_NODE (nat64_in2out_slowpath_node)

Definition at line 1281 of file nat64_in2out.c.