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/*
* Copyright (c) 2015 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef included_nsh_h
#define included_nsh_h
#include <vnet/vnet.h>
#include <nsh/nsh_packet.h>
#include <vnet/ip/ip4_packet.h>
typedef struct {
u16 class;
u8 type;
u8 pad;
} nsh_option_map_by_key_t;
typedef struct {
u32 option_id;
} nsh_option_map_t;
#define MAX_METADATA_LEN 62
/** Note:
* rewrite and rewrite_size used to support varied nsh header
*/
typedef struct {
nsh_base_header_t nsh_base;
union {
nsh_md1_data_t md1_data;
nsh_md2_data_t md2_data;
} md;
u8 tlvs_len; /* configured md2 metadata's length, unit: byte */
u8 * tlvs_data; /* configured md2 metadata, network order */
/** Rewrite string. network order
* contains base header and metadata */
u8 * rewrite;
u8 rewrite_size; /* unit: byte */
} nsh_entry_t;
typedef struct {
u8 is_add;
nsh_entry_t nsh_entry;
} nsh_add_del_entry_args_t;
typedef struct {
/** Key for nsh_header_t entry: 24bit NSP 8bit NSI */
u32 nsp_nsi;
/** Key for nsh_header_t entry to map to. : 24bit NSP 8bit NSI
* This may be ~0 if next action is to decap to NSH next protocol
* Note the following heuristic:
* if nsp_nsi == mapped_nsp_nsi then use-case is like SFC SFF
* if nsp_nsi != mapped_nsp_nsi then use-case is like SFC SF
* Note: these are heuristics. Rules about NSI decrement are out of scope
*/
u32 mapped_nsp_nsi;
/* NSH Header action: swap, push and pop */
u32 nsh_action;
/** vnet intfc hw_if_index */
u32 nsh_hw_if;
/* vnet intfc sw_if_index */
u32 nsh_sw_if;
/* encap if index */
u32 sw_if_index;
u32 rx_sw_if_index;
u32 next_node;
u32 adj_index;
} nsh_map_t;
typedef struct {
u8 is_add;
nsh_map_t map;
} nsh_add_del_map_args_t;
typedef struct {
u32 transport_type; /* 1:vxlan; */
u32 transport_index; /* transport's sw_if_index */
} nsh_proxy_session_by_key_t;
typedef struct {
/* 24bit NSP 8bit NSI */
u32 nsp_nsi;
} nsh_proxy_session_t;
#define MAX_MD2_OPTIONS 256
typedef struct {
/* API message ID base */
u16 msg_id_base;
/* vector of nsh_header entry instances */
nsh_entry_t *nsh_entries;
/* hash lookup nsh header by key: {u32: nsp_nsi} */
uword * nsh_entry_by_key;
/* vector of nsh_mappings */
nsh_map_t *nsh_mappings;
/* hash lookup nsh mapping by key: {u32: nsp_nsi} */
uword * nsh_mapping_by_key;
uword * nsh_mapping_by_mapped_key; // for use in NSHSFC
/* vector of nsh_proxy */
nsh_proxy_session_t *nsh_proxy_sessions;
/* hash lookup nsh_proxy by key */
uword * nsh_proxy_session_by_key;
/** Free vlib hw_if_indices */
u32 * free_nsh_tunnel_hw_if_indices;
/** Mapping from sw_if_index to tunnel index */
u32 * tunnel_index_by_sw_if_index;
/* vector of nsh_option_map */
nsh_option_map_t * nsh_option_mappings;
/* hash lookup nsh_option_map by key */
uword * nsh_option_map_by_key;
/* Array of function pointers to process MD-Type 2 handling routines */
/*
* For API or CLI configuration and construct the rewrite buffer, invokes add_options() function.
* In the encap node, i.e. when performing PUSH nsh header, invokes options() function.
* In the swap node, i.e. when performing SWAP nsh header, invokes swap_options() function.
* In the decap node, i.e. when performing POP nsh header, invokes pop_options() function.
*/
u8 options_size[MAX_MD2_OPTIONS]; /* sum of header and metadata */
int (*add_options[MAX_MD2_OPTIONS]) (u8 * opt,
u8 * opt_size);
int (*options[MAX_MD2_OPTIONS]) (vlib_buffer_t * b,
nsh_tlv_header_t * opt);
int (*swap_options[MAX_MD2_OPTIONS]) (vlib_buffer_t * b,
nsh_tlv_header_t * old_opt,
nsh_tlv_header_t * new_opt);
int (*pop_options[MAX_MD2_OPTIONS]) (vlib_buffer_t * b,
nsh_tlv_header_t * opt);
u8 *(*trace[MAX_MD2_OPTIONS]) (u8 * s, nsh_tlv_header_t * opt);
uword decap_v4_next_override;
/* Feature arc indices */
u8 input_feature_arc_index;
u8 output_feature_arc_index;
/* convenience */
vlib_main_t * vlib_main;
vnet_main_t * vnet_main;
} nsh_main_t;
nsh_main_t nsh_main;
extern vlib_node_registration_t nsh_aware_vnf_proxy_node;
extern vlib_node_registration_t nsh_eth_output_node;
typedef struct {
u8 trace_data[256];
} nsh_input_trace_t;
u8 * format_nsh_input_map_trace (u8 * s, va_list * args);
u8 * format_nsh_header_with_length (u8 * s, va_list * args);
/* Helper macros used in nsh.c and nsh_test.c */
#define foreach_copy_nsh_base_hdr_field \
_(ver_o_c) \
_(length) \
_(md_type) \
_(next_protocol) \
_(nsp_nsi)
/* Statistics (not really errors) */
#define foreach_nsh_node_error \
_(MAPPED, "NSH header found and mapped") \
_(NO_MAPPING, "no mapping for nsh key") \
_(NO_ENTRY, "no entry for nsh key") \
_(NO_PROXY, "no proxy for transport key") \
_(INVALID_NEXT_PROTOCOL, "invalid next protocol") \
_(INVALID_OPTIONS, "invalid md2 options") \
_(INVALID_TTL, "ttl equals zero") \
typedef enum {
#define _(sym,str) NSH_NODE_ERROR_##sym,
foreach_nsh_node_error
#undef _
NSH_NODE_N_ERROR,
} nsh_input_error_t;
#define foreach_nsh_node_next \
_(DROP, "error-drop") \
_(ENCAP_GRE4, "gre4-input" ) \
_(ENCAP_GRE6, "gre6-input" ) \
_(ENCAP_VXLANGPE, "vxlan-gpe-encap" ) \
_(ENCAP_VXLAN4, "vxlan4-encap" ) \
_(ENCAP_VXLAN6, "vxlan6-encap" ) \
_(DECAP_ETH_INPUT, "ethernet-input" ) \
_(ENCAP_LISP_GPE, "interface-output" ) \
_(ENCAP_ETHERNET, "nsh-eth-output") \
/* _(DECAP_IP4_INPUT, "ip4-input") \ */
/* _(DECAP_IP6_INPUT, "ip6-input" ) \ */
typedef enum {
#define _(s,n) NSH_NODE_NEXT_##s,
foreach_nsh_node_next
#undef _
NSH_NODE_N_NEXT,
} nsh_node_next_t;
typedef enum {
NSH_ACTION_SWAP,
NSH_ACTION_PUSH,
NSH_ACTION_POP,
} nsh_action_type;
typedef enum {
NSH_INPUT_TYPE,
NSH_PROXY_TYPE,
NSH_CLASSIFIER_TYPE,
NSH_AWARE_VNF_PROXY_TYPE,
} nsh_entity_type;
#define VNET_SW_INTERFACE_FLAG_ADMIN_DOWN 0
/* md2 class and type definition */
#define NSH_MD2_IOAM_CLASS 0x9
#define NSH_MD2_IOAM_OPTION_TYPE_TRACE 0x3B
#define NSH_MD2_IOAM_OPTION_TYPE_PROOF_OF_TRANSIT 0x3C
#define NSH_MD2_IOAM_TRACE_DUMMY_LEN 0x8
#define MAX_NSH_HEADER_LEN 256
#define MAX_NSH_OPTION_LEN 128
int
nsh_md2_register_option (u16 class,
u8 type,
u8 option_size,
int add_options (u8 * opt,
u8 * opt_size),
int options(vlib_buffer_t * b,
nsh_tlv_header_t * opt),
int swap_options (vlib_buffer_t * b,
nsh_tlv_header_t * old_opt,
nsh_tlv_header_t * new_opt),
int pop_options (vlib_buffer_t * b,
nsh_tlv_header_t * opt),
u8 * trace (u8 * s,
nsh_tlv_header_t * opt));
typedef struct _nsh_main_dummy
{
u8 output_feature_arc_index;
} nsh_main_dummy_t;
#endif /* included_nsh_h */
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