ip4_forward.c File Reference

Include dependency graph for ip4_forward.c:

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Data Structures
struct	ip4_forward_next_trace_t
struct	ip4_local_last_check_t

Macros
#define	ip4_local_csum_is_offloaded(_b)
#define	ip4_local_need_csum_check(is_tcp_udp, _b)
#define	ip4_local_csum_is_valid(_b)
#define	foreach_notrace_ip4_arp_error
#define	IP4_MCAST_ADDR_MASK   0xffff7f00
	This bits of an IPv4 address to mask to construct a multicast MAC address. More...

Enumerations
enum	ip_local_packet_type_e { IP_LOCAL_PACKET_TYPE_L4, IP_LOCAL_PACKET_TYPE_NAT, IP_LOCAL_PACKET_TYPE_FRAG }
enum	ip4_rewrite_next_t { IP4_REWRITE_NEXT_DROP, IP4_REWRITE_NEXT_ICMP_ERROR, IP4_REWRITE_NEXT_FRAGMENT, IP4_REWRITE_N_NEXT }

Functions
VLIB_NODE_FN()	ip4_lookup_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	IPv4 lookup node. More...
static u8 *	format_ip4_lookup_trace (u8 *s, va_list *args)
VLIB_NODE_FN()	ip4_load_balance_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
ip4_address_t *	ip4_interface_first_address (ip4_main_t *im, u32 sw_if_index, ip_interface_address_t **result_ia)
static void	ip4_add_subnet_bcast_route (u32 fib_index, fib_prefix_t *pfx, u32 sw_if_index)
static void	ip4_add_interface_prefix_routes (ip4_main_t *im, u32 sw_if_index, u32 fib_index, ip_interface_address_t *a)
static void	ip4_add_interface_routes (u32 sw_if_index, ip4_main_t *im, u32 fib_index, ip_interface_address_t *a)
static void	ip4_del_interface_prefix_routes (ip4_main_t *im, u32 sw_if_index, u32 fib_index, ip4_address_t *address, u32 address_length)
static void	ip4_del_interface_routes (u32 sw_if_index, ip4_main_t *im, u32 fib_index, ip4_address_t *address, u32 address_length)
void	ip4_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable)
static clib_error_t *	ip4_add_del_interface_address_internal (vlib_main_t *vm, u32 sw_if_index, ip4_address_t *address, u32 address_length, u32 is_del)
clib_error_t *	ip4_add_del_interface_address (vlib_main_t *vm, u32 sw_if_index, ip4_address_t *address, u32 address_length, u32 is_del)
void	ip4_directed_broadcast (u32 sw_if_index, u8 enable)
static clib_error_t *	ip4_sw_interface_admin_up_down (vnet_main_t *vnm, u32 sw_if_index, u32 flags)
	VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip4_sw_interface_admin_up_down)
	VNET_FEATURE_ARC_INIT (ip4_unicast, static)
	VNET_FEATURE_INIT (ip4_flow_classify, static)
	VNET_FEATURE_INIT (ip4_inacl, static)
	VNET_FEATURE_INIT (ip4_source_check_1, static)
	VNET_FEATURE_INIT (ip4_source_check_2, static)
	VNET_FEATURE_INIT (ip4_source_and_port_range_check_rx, static)
	VNET_FEATURE_INIT (ip4_policer_classify, static)
	VNET_FEATURE_INIT (ip4_ipsec, static)
	VNET_FEATURE_INIT (ip4_vpath, static)
	VNET_FEATURE_INIT (ip4_vxlan_bypass, static)
	VNET_FEATURE_INIT (ip4_not_enabled, static)
	VNET_FEATURE_INIT (ip4_lookup, static)
	VNET_FEATURE_ARC_INIT (ip4_multicast, static)
	VNET_FEATURE_INIT (ip4_vpath_mc, static)
	VNET_FEATURE_INIT (ip4_mc_not_enabled, static)
	VNET_FEATURE_INIT (ip4_lookup_mc, static)
	VNET_FEATURE_ARC_INIT (ip4_output, static)
	VNET_FEATURE_INIT (ip4_source_and_port_range_check_tx, static)
	VNET_FEATURE_INIT (ip4_outacl, static)
	VNET_FEATURE_INIT (ip4_ipsec_output, static)
	VNET_FEATURE_INIT (ip4_interface_output, static)
static clib_error_t *	ip4_sw_interface_add_del (vnet_main_t *vnm, u32 sw_if_index, u32 is_add)
	VNET_SW_INTERFACE_ADD_DEL_FUNCTION (ip4_sw_interface_add_del)
static clib_error_t *	ip4_lookup_init (vlib_main_t *vm)
u8 *	format_ip4_forward_next_trace (u8 *s, va_list *args)
static u8 *	format_ip4_rewrite_trace (u8 *s, va_list *args)
void	ip4_forward_next_trace (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, vlib_rx_or_tx_t which_adj_index)
u16	ip4_tcp_udp_compute_checksum (vlib_main_t *vm, vlib_buffer_t *p0, ip4_header_t *ip0)
u32	ip4_tcp_udp_validate_checksum (vlib_main_t *vm, vlib_buffer_t *p0)
	VNET_FEATURE_ARC_INIT (ip4_local)
static void	ip4_local_l4_csum_validate (vlib_main_t *vm, vlib_buffer_t *p, ip4_header_t *ip, u8 is_udp, u8 *error, u8 *good_tcp_udp)
static void	ip4_local_check_l4_csum (vlib_main_t *vm, vlib_buffer_t *b, ip4_header_t *ih, u8 *error)
static void	ip4_local_check_l4_csum_x2 (vlib_main_t *vm, vlib_buffer_t **b, ip4_header_t **ih, u8 *error)
static void	ip4_local_set_next_and_error (vlib_node_runtime_t *error_node, vlib_buffer_t *b, u16 *next, u8 error, u8 head_of_feature_arc)
static void	ip4_local_check_src (vlib_buffer_t *b, ip4_header_t *ip0, ip4_local_last_check_t *last_check, u8 *error0)
static void	ip4_local_check_src_x2 (vlib_buffer_t **b, ip4_header_t **ip, ip4_local_last_check_t *last_check, u8 *error)
static u8	ip4_local_classify (vlib_buffer_t *b, ip4_header_t *ip, u16 *next)
	Determine packet type and next node. More...
static uword	ip4_local_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int head_of_feature_arc)
VLIB_NODE_FN()	ip4_local_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
VLIB_NODE_FN()	ip4_local_end_of_arc_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	VNET_FEATURE_INIT (ip4_local_end_of_arc, static)
void	ip4_register_protocol (u32 protocol, u32 node_index)
void	ip4_unregister_protocol (u32 protocol)
static clib_error_t *	show_ip_local_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
static uword	ip4_arp_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int is_glean)
VLIB_NODE_FN()	ip4_arp_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
VLIB_NODE_FN()	ip4_glean_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
static clib_error_t *	arp_notrace_init (vlib_main_t *vm)
clib_error_t *	ip4_probe_neighbor (vlib_main_t *vm, ip4_address_t *dst, u32 sw_if_index, u8 refresh)
static void	ip4_mtu_check (vlib_buffer_t *b, u16 packet_len, u16 adj_packet_bytes, bool df, u16 *next, u32 *error)
static_always_inline void	ip4_ttl_and_checksum_check (vlib_buffer_t *b, ip4_header_t *ip, u16 *next, u32 *error)
static uword	ip4_rewrite_inline_with_gso (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int do_counters, int is_midchain, int is_mcast, int do_gso)
static uword	ip4_rewrite_inline (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int do_counters, int is_midchain, int is_mcast)
VLIB_NODE_FN()	ip4_rewrite_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
	IPv4 rewrite node. More...
VLIB_NODE_FN()	ip4_rewrite_bcast_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
VLIB_NODE_FN()	ip4_midchain_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
VLIB_NODE_FN()	ip4_rewrite_mcast_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
VLIB_NODE_FN()	ip4_mcast_midchain_node (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
static int	ip4_lookup_validate (ip4_address_t *a, u32 fib_index0)
static clib_error_t *	test_lookup_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
int	vnet_set_ip4_flow_hash (u32 table_id, u32 flow_hash_config)
static clib_error_t *	set_ip_flow_hash_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
int	vnet_set_ip4_classify_intfc (vlib_main_t *vm, u32 sw_if_index, u32 table_index)
static clib_error_t *	set_ip_classify_command_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
static clib_error_t *	ip4_config (vlib_main_t *vm, unformat_input_t *input)

Variables
vlib_node_registration_t	ip4_lookup_node
	(constructor) VLIB_REGISTER_NODE (ip4_lookup_node) More...
vlib_node_registration_t	ip4_load_balance_node
	(constructor) VLIB_REGISTER_NODE (ip4_load_balance_node) More...
ip4_main_t	ip4_main
	Global ip4 main structure. More...
vlib_node_registration_t	ip4_local_node
	(constructor) VLIB_REGISTER_NODE (ip4_local_node) More...
vlib_node_registration_t	ip4_local_end_of_arc_node
	(constructor) VLIB_REGISTER_NODE (ip4_local_end_of_arc_node) More...
static vlib_cli_command_t	show_ip_local
	(constructor) VLIB_CLI_COMMAND (show_ip_local) More...
static char *	ip4_arp_error_strings []
vlib_node_registration_t	ip4_arp_node
	(constructor) VLIB_REGISTER_NODE (ip4_arp_node) More...
vlib_node_registration_t	ip4_glean_node
	(constructor) VLIB_REGISTER_NODE (ip4_glean_node) More...
vlib_node_registration_t	ip4_rewrite_node
	(constructor) VLIB_REGISTER_NODE (ip4_rewrite_node) More...
vlib_node_registration_t	ip4_rewrite_bcast_node
	(constructor) VLIB_REGISTER_NODE (ip4_rewrite_bcast_node) More...
vlib_node_registration_t	ip4_rewrite_mcast_node
	(constructor) VLIB_REGISTER_NODE (ip4_rewrite_mcast_node) More...
vlib_node_registration_t	ip4_mcast_midchain_node
	(constructor) VLIB_REGISTER_NODE (ip4_mcast_midchain_node) More...
vlib_node_registration_t	ip4_midchain_node
	(constructor) VLIB_REGISTER_NODE (ip4_midchain_node) More...
static vlib_cli_command_t	lookup_test_command
	(constructor) VLIB_CLI_COMMAND (lookup_test_command) More...
static vlib_cli_command_t	set_ip_flow_hash_command
	(constructor) VLIB_CLI_COMMAND (set_ip_flow_hash_command) More...
static vlib_cli_command_t	set_ip_classify_command
	(constructor) VLIB_CLI_COMMAND (set_ip_classify_command) More...

Macro Definition Documentation

foreach_notrace_ip4_arp_error

#define foreach_notrace_ip4_arp_error

Value:

_(THROTTLED)                                    \
_(RESOLVED)                                     \
_(NO_BUFFERS)                                   \
_(REQUEST_SENT)                                 \
_(NON_ARP_ADJ)                                  \
_(NO_SOURCE_ADDRESS)

Definition at line 2140 of file ip4_forward.c.

ip4_local_csum_is_offloaded

#define ip4_local_csum_is_offloaded

(

_b

)

Value:

_b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM                             \
        || _b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM

Definition at line 1391 of file ip4_forward.c.

ip4_local_csum_is_valid

#define ip4_local_csum_is_valid

(

_b

)

Value:

(_b->flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT                  \
        || (ip4_local_csum_is_offloaded (_b))) != 0

Definition at line 1399 of file ip4_forward.c.

ip4_local_need_csum_check

#define ip4_local_need_csum_check	(		is_tcp_udp,
			_b
	)

Value:

(is_tcp_udp && !(_b->flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED         \
        || ip4_local_csum_is_offloaded (_b)))

Definition at line 1395 of file ip4_forward.c.

IP4_MCAST_ADDR_MASK

#define IP4_MCAST_ADDR_MASK   0xffff7f00

This bits of an IPv4 address to mask to construct a multicast MAC address.

Definition at line 2291 of file ip4_forward.c.

Enumeration Type Documentation

ip4_rewrite_next_t

enum ip4_rewrite_next_t

Enumerator
IP4_REWRITE_NEXT_DROP
IP4_REWRITE_NEXT_ICMP_ERROR
IP4_REWRITE_NEXT_FRAGMENT
IP4_REWRITE_N_NEXT

Definition at line 2276 of file ip4_forward.c.

ip_local_packet_type_e

enum ip_local_packet_type_e

Enumerator
IP_LOCAL_PACKET_TYPE_L4
IP_LOCAL_PACKET_TYPE_NAT
IP_LOCAL_PACKET_TYPE_FRAG

Definition at line 1656 of file ip4_forward.c.

Function Documentation

arp_notrace_init()

static clib_error_t* arp_notrace_init ( vlib_main_t *  vm )

static

Definition at line 2149 of file ip4_forward.c.

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format_ip4_forward_next_trace()

u8* format_ip4_forward_next_trace	(	u8 *	s,
		va_list *	args
	)

Definition at line 1161 of file ip4_forward.c.

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format_ip4_lookup_trace()

static u8 * format_ip4_lookup_trace ( u8 *  s, va_list *  args  )

static

Definition at line 1175 of file ip4_forward.c.

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format_ip4_rewrite_trace()

static u8* format_ip4_rewrite_trace ( u8 *  s, va_list *  args  )

static

Definition at line 1191 of file ip4_forward.c.

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ip4_add_del_interface_address()

clib_error_t* ip4_add_del_interface_address	(	vlib_main_t *	vm,
		u32	sw_if_index,
		ip4_address_t *	address,
		u32	address_length,
		u32	is_del
	)

Definition at line 791 of file ip4_forward.c.

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ip4_add_del_interface_address_internal()

static clib_error_t* ip4_add_del_interface_address_internal ( vlib_main_t *  vm, u32  sw_if_index, ip4_address_t *  address, u32  address_length, u32  is_del  )

static

Definition at line 672 of file ip4_forward.c.

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ip4_add_interface_prefix_routes()

static void ip4_add_interface_prefix_routes ( ip4_main_t *  im, u32  sw_if_index, u32  fib_index, ip_interface_address_t *  a  )

static

Definition at line 342 of file ip4_forward.c.

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ip4_add_interface_routes()

static void ip4_add_interface_routes ( u32  sw_if_index, ip4_main_t *  im, u32  fib_index, ip_interface_address_t *  a  )

static

Definition at line 444 of file ip4_forward.c.

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ip4_add_subnet_bcast_route()

static void ip4_add_subnet_bcast_route ( u32  fib_index, fib_prefix_t *  pfx, u32  sw_if_index  )

static

Definition at line 303 of file ip4_forward.c.

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ip4_arp_inline()

static uword ip4_arp_inline ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame, int  is_glean  )

inlinestatic

Definition at line 1934 of file ip4_forward.c.

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ip4_arp_node()

VLIB_NODE_FN() ip4_arp_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 2090 of file ip4_forward.c.

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ip4_config()

static clib_error_t* ip4_config ( vlib_main_t *  vm, unformat_input_t *  input  )

static

Definition at line 3197 of file ip4_forward.c.

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ip4_del_interface_prefix_routes()

static void ip4_del_interface_prefix_routes ( ip4_main_t *  im, u32  sw_if_index, u32  fib_index, ip4_address_t *  address, u32  address_length  )

static

Definition at line 494 of file ip4_forward.c.

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ip4_del_interface_routes()

static void ip4_del_interface_routes ( u32  sw_if_index, ip4_main_t *  im, u32  fib_index, ip4_address_t *  address, u32  address_length  )

static

Definition at line 617 of file ip4_forward.c.

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ip4_directed_broadcast()

void ip4_directed_broadcast	(	u32	sw_if_index,
		u8	enable
	)

Definition at line 801 of file ip4_forward.c.

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ip4_forward_next_trace()

void ip4_forward_next_trace	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame,
		vlib_rx_or_tx_t	which_adj_index
	)

Definition at line 1211 of file ip4_forward.c.

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ip4_glean_node()

VLIB_NODE_FN() ip4_glean_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 2096 of file ip4_forward.c.

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ip4_interface_first_address()

ip4_address_t* ip4_interface_first_address	(	ip4_main_t *	im,
		u32	sw_if_index,
		ip_interface_address_t **	result_ia
	)

Definition at line 278 of file ip4_forward.c.

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ip4_load_balance_node()

VLIB_NODE_FN() ip4_load_balance_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 111 of file ip4_forward.c.

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ip4_local_check_l4_csum()

static void ip4_local_check_l4_csum ( vlib_main_t *  vm, vlib_buffer_t *  b, ip4_header_t *  ih, u8 *  error  )

inlinestatic

Definition at line 1404 of file ip4_forward.c.

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ip4_local_check_l4_csum_x2()

static void ip4_local_check_l4_csum_x2 ( vlib_main_t *  vm, vlib_buffer_t **  b, ip4_header_t **  ih, u8 *  error  )

inlinestatic

Definition at line 1423 of file ip4_forward.c.

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ip4_local_check_src()

static void ip4_local_check_src ( vlib_buffer_t *  b, ip4_header_t *  ip0, ip4_local_last_check_t *  last_check, u8 *  error0  )

inlinestatic

Definition at line 1486 of file ip4_forward.c.

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ip4_local_check_src_x2()

static void ip4_local_check_src_x2 ( vlib_buffer_t **  b, ip4_header_t **  ip, ip4_local_last_check_t *  last_check, u8 *  error  )

inlinestatic

Definition at line 1555 of file ip4_forward.c.

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ip4_local_classify()

static u8 ip4_local_classify ( vlib_buffer_t *  b, ip4_header_t *  ip, u16 *  next  )

inlinestatic

Determine packet type and next node.

The expectation is that all packets that are not L4 will skip checksums and source checks.

Definition at line 1670 of file ip4_forward.c.

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ip4_local_end_of_arc_node()

VLIB_NODE_FN() ip4_local_end_of_arc_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 1840 of file ip4_forward.c.

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ip4_local_inline()

static uword ip4_local_inline ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame, int  head_of_feature_arc  )

inlinestatic

Definition at line 1690 of file ip4_forward.c.

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ip4_local_l4_csum_validate()

static void ip4_local_l4_csum_validate ( vlib_main_t *  vm, vlib_buffer_t *  p, ip4_header_t *  ip, u8  is_udp, u8 *  error, u8 *  good_tcp_udp  )

inlinestatic

Definition at line 1368 of file ip4_forward.c.

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ip4_local_node()

VLIB_NODE_FN() ip4_local_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 1813 of file ip4_forward.c.

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ip4_local_set_next_and_error()

static void ip4_local_set_next_and_error ( vlib_node_runtime_t *  error_node, vlib_buffer_t *  b, u16 *  next, u8  error, u8  head_of_feature_arc  )

inlinestatic

Definition at line 1455 of file ip4_forward.c.

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ip4_lookup_init()

static clib_error_t* ip4_lookup_init ( vlib_main_t *  vm )

static

Definition at line 1080 of file ip4_forward.c.

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ip4_lookup_node()

VLIB_NODE_FN() ip4_lookup_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

IPv4 lookup node.

Node Identifier:

ip4-lookup

This is the main IPv4 lookup dispatch node.

Parameters

vm	vlib_main_t corresponding to the current thread
node	vlib_node_runtime_t
frame	vlib_frame_t whose contents should be dispatched

Graph mechanics: buffer metadata, next index usage

Uses:

• vnet_buffer(b)->sw_if_index[VLIB_RX]
  • Indicates the sw_if_index value of the interface that the packet was received on.
• vnet_buffer(b)->sw_if_index[VLIB_TX]
  • When the value is ~0 then the node performs a longest prefix match (LPM) for the packet destination address in the FIB attached to the receive interface.
  • Otherwise perform LPM for the packet destination address in the indicated FIB. In this case [VLIB_TX] is a FIB index value (0, 1, ...) and not a VRF id.

Sets:

• vnet_buffer(b)->ip.adj_index[VLIB_TX]
  • The lookup result adjacency index.

Next Index:

• Dispatches the packet to the node index found in ip_adjacency_t adj->lookup_next_index (where adj is the lookup result adjacency).

Definition at line 92 of file ip4_forward.c.

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ip4_lookup_validate()

static int ip4_lookup_validate ( ip4_address_t *  a, u32  fib_index0  )

static

Definition at line 2821 of file ip4_forward.c.

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ip4_mcast_midchain_node()

VLIB_NODE_FN() ip4_mcast_midchain_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 2763 of file ip4_forward.c.

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ip4_midchain_node()

VLIB_NODE_FN() ip4_midchain_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 2743 of file ip4_forward.c.

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ip4_mtu_check()

static void ip4_mtu_check ( vlib_buffer_t *  b, u16  packet_len, u16  adj_packet_bytes, bool  df, u16 *  next, u32 *  error  )

inlinestatic

Definition at line 2295 of file ip4_forward.c.

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ip4_probe_neighbor()

clib_error_t* ip4_probe_neighbor	(	vlib_main_t *	vm,
		ip4_address_t *	dst,
		u32	sw_if_index,
		u8	refresh
	)

Definition at line 2169 of file ip4_forward.c.

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ip4_register_protocol()

void ip4_register_protocol	(	u32	protocol,
		u32	node_index
	)

Definition at line 1865 of file ip4_forward.c.

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ip4_rewrite_bcast_node()

VLIB_NODE_FN() ip4_rewrite_bcast_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 2733 of file ip4_forward.c.

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ip4_rewrite_inline()

static uword ip4_rewrite_inline ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame, int  do_counters, int  is_midchain, int  is_mcast  )

inlinestatic

Definition at line 2675 of file ip4_forward.c.

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ip4_rewrite_inline_with_gso()

static uword ip4_rewrite_inline_with_gso ( vlib_main_t *  vm, vlib_node_runtime_t *  node, vlib_frame_t *  frame, int  do_counters, int  is_midchain, int  is_mcast, int  do_gso  )

inlinestatic

Definition at line 2366 of file ip4_forward.c.

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ip4_rewrite_mcast_node()

VLIB_NODE_FN() ip4_rewrite_mcast_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

Definition at line 2753 of file ip4_forward.c.

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ip4_rewrite_node()

VLIB_NODE_FN() ip4_rewrite_node	(	vlib_main_t *	vm,
		vlib_node_runtime_t *	node,
		vlib_frame_t *	frame
	)

IPv4 rewrite node.

Node Identifier:

ip4-rewrite

This is the IPv4 transit-rewrite node: decrement TTL, fix the ipv4 header checksum, fetch the ip adjacency, check the outbound mtu, apply the adjacency rewrite, and send pkts to the adjacency rewrite header's rewrite_next_index.

Parameters

vm	vlib_main_t corresponding to the current thread
node	vlib_node_runtime_t
frame	vlib_frame_t whose contents should be dispatched

Graph mechanics: buffer metadata, next index usage

Uses:

• vnet_buffer(b)->ip.adj_index[VLIB_TX]
  • the rewrite adjacency index
• adj->lookup_next_index
  • Must be IP_LOOKUP_NEXT_REWRITE or IP_LOOKUP_NEXT_ARP, otherwise the packet will be dropped.
• adj->rewrite_header
  • Rewrite string length, rewrite string, next_index

Sets:

• b->current_data, b->current_length
  • Updated net of applying the rewrite string

Next Indices:

• adj->rewrite_header.next_index or ip4-drop

Definition at line 2724 of file ip4_forward.c.

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ip4_sw_interface_add_del()

static clib_error_t* ip4_sw_interface_add_del ( vnet_main_t *  vnm, u32  sw_if_index, u32  is_add  )

static

Definition at line 1037 of file ip4_forward.c.

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ip4_sw_interface_admin_up_down()

static clib_error_t* ip4_sw_interface_admin_up_down ( vnet_main_t *  vnm, u32  sw_if_index, u32  flags  )

static

Definition at line 841 of file ip4_forward.c.

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ip4_sw_interface_enable_disable()

void ip4_sw_interface_enable_disable	(	u32	sw_if_index,
		u32	is_enable
	)

Definition at line 637 of file ip4_forward.c.

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ip4_tcp_udp_compute_checksum()

u16 ip4_tcp_udp_compute_checksum	(	vlib_main_t *	vm,
		vlib_buffer_t *	p0,
		ip4_header_t *	ip0
	)

Definition at line 1299 of file ip4_forward.c.

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ip4_tcp_udp_validate_checksum()

u32 ip4_tcp_udp_validate_checksum	(	vlib_main_t *	vm,
		vlib_buffer_t *	p0
	)

Definition at line 1332 of file ip4_forward.c.

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ip4_ttl_and_checksum_check()

static_always_inline void ip4_ttl_and_checksum_check	(	vlib_buffer_t *	b,
		ip4_header_t *	ip,
		u16 *	next,
		u32 *	error
	)

Definition at line 2322 of file ip4_forward.c.

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ip4_unregister_protocol()

void ip4_unregister_protocol

(

u32

protocol

)

Definition at line 1877 of file ip4_forward.c.

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set_ip_classify_command_fn()

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

static

Definition at line 3134 of file ip4_forward.c.

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set_ip_flow_hash_command_fn()

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

static

Definition at line 2936 of file ip4_forward.c.

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show_ip_local_command_fn()

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

static

Definition at line 1888 of file ip4_forward.c.

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test_lookup_command_fn()

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

static

Definition at line 2839 of file ip4_forward.c.

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VNET_FEATURE_ARC_INIT() [1/4]

VNET_FEATURE_ARC_INIT	(	ip4_unicast	,
		static
	)

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VNET_FEATURE_ARC_INIT() [2/4]

VNET_FEATURE_ARC_INIT	(	ip4_multicast	,
		static
	)

VNET_FEATURE_ARC_INIT() [3/4]

VNET_FEATURE_ARC_INIT	(	ip4_output	,
		static
	)

VNET_FEATURE_ARC_INIT() [4/4]

VNET_FEATURE_ARC_INIT

(

ip4_local

)

VNET_FEATURE_INIT() [1/19]

VNET_FEATURE_INIT	(	ip4_flow_classify	,
		static
	)

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VNET_FEATURE_INIT() [2/19]

VNET_FEATURE_INIT	(	ip4_inacl	,
		static
	)

VNET_FEATURE_INIT() [3/19]

VNET_FEATURE_INIT	(	ip4_source_check_1	,
		static
	)

VNET_FEATURE_INIT() [4/19]

VNET_FEATURE_INIT	(	ip4_source_check_2	,
		static
	)

VNET_FEATURE_INIT() [5/19]

VNET_FEATURE_INIT	(	ip4_source_and_port_range_check_rx	,
		static
	)

VNET_FEATURE_INIT() [6/19]

VNET_FEATURE_INIT	(	ip4_policer_classify	,
		static
	)

VNET_FEATURE_INIT() [7/19]

VNET_FEATURE_INIT	(	ip4_ipsec	,
		static
	)

VNET_FEATURE_INIT() [8/19]

VNET_FEATURE_INIT	(	ip4_vpath	,
		static
	)

VNET_FEATURE_INIT() [9/19]

VNET_FEATURE_INIT	(	ip4_vxlan_bypass	,
		static
	)

VNET_FEATURE_INIT() [10/19]

VNET_FEATURE_INIT	(	ip4_not_enabled	,
		static
	)

VNET_FEATURE_INIT() [11/19]

VNET_FEATURE_INIT	(	ip4_lookup	,
		static
	)

VNET_FEATURE_INIT() [12/19]

VNET_FEATURE_INIT	(	ip4_vpath_mc	,
		static
	)

VNET_FEATURE_INIT() [13/19]

VNET_FEATURE_INIT	(	ip4_mc_not_enabled	,
		static
	)

VNET_FEATURE_INIT() [14/19]

VNET_FEATURE_INIT	(	ip4_lookup_mc	,
		static
	)

VNET_FEATURE_INIT() [15/19]

VNET_FEATURE_INIT	(	ip4_source_and_port_range_check_tx	,
		static
	)

VNET_FEATURE_INIT() [16/19]

VNET_FEATURE_INIT	(	ip4_outacl	,
		static
	)

VNET_FEATURE_INIT() [17/19]

VNET_FEATURE_INIT	(	ip4_ipsec_output	,
		static
	)

VNET_FEATURE_INIT() [18/19]

VNET_FEATURE_INIT	(	ip4_interface_output	,
		static
	)

VNET_FEATURE_INIT() [19/19]

VNET_FEATURE_INIT	(	ip4_local_end_of_arc	,
		static
	)

vnet_set_ip4_classify_intfc()

int vnet_set_ip4_classify_intfc	(	vlib_main_t *	vm,
		u32	sw_if_index,
		u32	table_index
	)

Definition at line 3073 of file ip4_forward.c.

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vnet_set_ip4_flow_hash()

int vnet_set_ip4_flow_hash	(	u32	table_id,
		u32	flow_hash_config
	)

Definition at line 2919 of file ip4_forward.c.

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VNET_SW_INTERFACE_ADD_DEL_FUNCTION()

VNET_SW_INTERFACE_ADD_DEL_FUNCTION

(

ip4_sw_interface_add_del

)

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VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION()

VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION

(

ip4_sw_interface_admin_up_down

)

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Variable Documentation

ip4_arp_error_strings

char* ip4_arp_error_strings[]

static

Initial value:

= {
  [IP4_ARP_ERROR_THROTTLED] = "ARP requests throttled",
  [IP4_ARP_ERROR_RESOLVED] = "ARP requests resolved",
  [IP4_ARP_ERROR_NO_BUFFERS] = "ARP requests out of buffer",
  [IP4_ARP_ERROR_REQUEST_SENT] = "ARP requests sent",
  [IP4_ARP_ERROR_NON_ARP_ADJ] = "ARPs to non-ARP adjacencies",
  [IP4_ARP_ERROR_NO_SOURCE_ADDRESS] = "no source address for ARP request",
}

Definition at line 2102 of file ip4_forward.c.

ip4_arp_node

vlib_node_registration_t ip4_arp_node

Initial value:

=
{
  .name = "ip4-arp",
  .vector_size = sizeof (u32),
  .format_trace = format_ip4_forward_next_trace,
  .n_errors = ARRAY_LEN (ip4_arp_error_strings),
  .error_strings = ip4_arp_error_strings,
  .n_next_nodes = IP4_ARP_N_NEXT,
  .next_nodes =
  {
    [IP4_ARP_NEXT_DROP] = "error-drop",
  },
}

(constructor) VLIB_REGISTER_NODE (ip4_arp_node)

Definition at line 2112 of file ip4_forward.c.

ip4_glean_node

vlib_node_registration_t ip4_glean_node

Initial value:

=
{
  .name = "ip4-glean",
  .vector_size = sizeof (u32),
  .format_trace = format_ip4_forward_next_trace,
  .n_errors = ARRAY_LEN (ip4_arp_error_strings),
  .error_strings = ip4_arp_error_strings,
  .n_next_nodes = IP4_ARP_N_NEXT,
  .next_nodes = {
  [IP4_ARP_NEXT_DROP] = "error-drop",
  },
}

(constructor) VLIB_REGISTER_NODE (ip4_glean_node)

Definition at line 2126 of file ip4_forward.c.

ip4_load_balance_node

vlib_node_registration_t ip4_load_balance_node

Initial value:

=
{
  .name = "ip4-load-balance",
  .vector_size = sizeof (u32),
  .sibling_of = "ip4-lookup",
  .format_trace = format_ip4_lookup_trace,
}

(constructor) VLIB_REGISTER_NODE (ip4_load_balance_node)

Definition at line 266 of file ip4_forward.c.

ip4_local_end_of_arc_node

vlib_node_registration_t ip4_local_end_of_arc_node

Initial value:

= {
  .name = "ip4-local-end-of-arc",
  .vector_size = sizeof (u32),

  .format_trace = format_ip4_forward_next_trace,
  .sibling_of = "ip4-local",
}

(constructor) VLIB_REGISTER_NODE (ip4_local_end_of_arc_node)

Definition at line 1848 of file ip4_forward.c.

ip4_local_node

vlib_node_registration_t ip4_local_node

Initial value:

=
{
  .name = "ip4-local",
  .vector_size = sizeof (u32),
  .format_trace = format_ip4_forward_next_trace,
  .n_errors = IP4_N_ERROR,
  .error_strings = ip4_error_strings,
  .n_next_nodes = IP_LOCAL_N_NEXT,
  .next_nodes =
  {
    [IP_LOCAL_NEXT_DROP] = "ip4-drop",
    [IP_LOCAL_NEXT_PUNT] = "ip4-punt",
    [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip4-udp-lookup",
    [IP_LOCAL_NEXT_ICMP] = "ip4-icmp-input",
    [IP_LOCAL_NEXT_REASSEMBLY] = "ip4-full-reassembly",
  },
}

(constructor) VLIB_REGISTER_NODE (ip4_local_node)

Definition at line 1820 of file ip4_forward.c.

ip4_lookup_node

vlib_node_registration_t ip4_lookup_node

Initial value:

=
{
  .name = "ip4-lookup",
  .vector_size = sizeof (u32),
  .format_trace = format_ip4_lookup_trace,
  .n_next_nodes = IP_LOOKUP_N_NEXT,
  .next_nodes = IP4_LOOKUP_NEXT_NODES,
}

(constructor) VLIB_REGISTER_NODE (ip4_lookup_node)

Definition at line 101 of file ip4_forward.c.

ip4_main

ip4_main_t ip4_main

Global ip4 main structure.

Definition at line 1076 of file ip4_forward.c.

ip4_mcast_midchain_node

vlib_node_registration_t ip4_mcast_midchain_node

Initial value:

= {
  .name = "ip4-mcast-midchain",
  .vector_size = sizeof (u32),

  .format_trace = format_ip4_rewrite_trace,
  .sibling_of = "ip4-rewrite",
}

(constructor) VLIB_REGISTER_NODE (ip4_mcast_midchain_node)

Definition at line 2804 of file ip4_forward.c.

ip4_midchain_node

vlib_node_registration_t ip4_midchain_node

Initial value:

= {
  .name = "ip4-midchain",
  .vector_size = sizeof (u32),
  .format_trace = format_ip4_forward_next_trace,
  .sibling_of =  "ip4-rewrite",
}

(constructor) VLIB_REGISTER_NODE (ip4_midchain_node)

Definition at line 2812 of file ip4_forward.c.

ip4_rewrite_bcast_node

vlib_node_registration_t ip4_rewrite_bcast_node

Initial value:

= {
  .name = "ip4-rewrite-bcast",
  .vector_size = sizeof (u32),

  .format_trace = format_ip4_rewrite_trace,
  .sibling_of = "ip4-rewrite",
}

(constructor) VLIB_REGISTER_NODE (ip4_rewrite_bcast_node)

Definition at line 2788 of file ip4_forward.c.

ip4_rewrite_mcast_node

vlib_node_registration_t ip4_rewrite_mcast_node

Initial value:

= {
  .name = "ip4-rewrite-mcast",
  .vector_size = sizeof (u32),

  .format_trace = format_ip4_rewrite_trace,
  .sibling_of = "ip4-rewrite",
}

(constructor) VLIB_REGISTER_NODE (ip4_rewrite_mcast_node)

Definition at line 2796 of file ip4_forward.c.

ip4_rewrite_node

vlib_node_registration_t ip4_rewrite_node

Initial value:

= {
  .name = "ip4-rewrite",
  .vector_size = sizeof (u32),

  .format_trace = format_ip4_rewrite_trace,

  .n_next_nodes = IP4_REWRITE_N_NEXT,
  .next_nodes = {
    [IP4_REWRITE_NEXT_DROP] = "ip4-drop",
    [IP4_REWRITE_NEXT_ICMP_ERROR] = "ip4-icmp-error",
    [IP4_REWRITE_NEXT_FRAGMENT] = "ip4-frag",
  },
}

(constructor) VLIB_REGISTER_NODE (ip4_rewrite_node)

Definition at line 2774 of file ip4_forward.c.

lookup_test_command

vlib_cli_command_t lookup_test_command

static

Initial value:

=
{
  .path = "test lookup",
  .short_help = "test lookup <ipv4-addr> [table <fib-id>] [count <nn>]",
  .function = test_lookup_command_fn,
}

(constructor) VLIB_CLI_COMMAND (lookup_test_command)

Definition at line 2909 of file ip4_forward.c.

set_ip_classify_command

vlib_cli_command_t set_ip_classify_command

static

Initial value:

=
{
    .path = "set ip classify",
    .short_help =
    "set ip classify intfc <interface> table-index <classify-idx>",
    .function = set_ip_classify_command_fn,
}

(constructor) VLIB_CLI_COMMAND (set_ip_classify_command)

Definition at line 3187 of file ip4_forward.c.

set_ip_flow_hash_command

vlib_cli_command_t set_ip_flow_hash_command

static

Initial value:

=
{
  .path = "set ip flow-hash",
  .short_help =
  "set ip flow-hash table <table-id> [src] [dst] [sport] [dport] [proto] [reverse]",
  .function = set_ip_flow_hash_command_fn,
}

(constructor) VLIB_CLI_COMMAND (set_ip_flow_hash_command)

Definition at line 3062 of file ip4_forward.c.

show_ip_local

vlib_cli_command_t show_ip_local

static

Initial value:

=
{
  .path = "show ip local",
  .function = show_ip_local_command_fn,
  .short_help = "show ip local",
}

(constructor) VLIB_CLI_COMMAND (show_ip_local)

Definition at line 1925 of file ip4_forward.c.