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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 {
/** 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;
/* vnet intfc sw_if_index */
u32 sw_if_index;
u32 next_node;
} nsh_map_t;
typedef struct {
nsh_map_t map;
u8 is_add;
} nsh_add_del_map_args_t;
typedef struct {
u8 is_add;
nsh_header_t nsh;
} nsh_add_del_entry_args_t;
typedef struct {
/* API message ID base */
u16 msg_id_base;
/* vector of nsh_header entry instances */
nsh_header_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
/* convenience */
vlib_main_t * vlib_main;
vnet_main_t * vnet_main;
} nsh_main_t;
nsh_main_t nsh_main;
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_nshhdr_field \
_(ver_o_c) \
_(length) \
_(md_type) \
_(next_protocol) \
_(nsp_nsi) \
_(c1) \
_(c2) \
_(c3) \
_(c4)
/* TODO Temp killing tlvs as its causing pain - fix in NSH_SFC */
#define foreach_32bit_field \
_(nsp_nsi) \
_(c1) \
_(c2) \
_(c3) \
_(c4)
/* Statistics (not really errors) */
#define foreach_nsh_input_error \
_(MAPPED, "NSH header found and mapped") \
_(NO_MAPPING, "no mapping for nsh key") \
_(INVALID_NEXT_PROTOCOL, "invalid next protocol") \
typedef enum {
#define _(sym,str) NSH_INPUT_ERROR_##sym,
foreach_nsh_input_error
#undef _
NSH_INPUT_N_ERROR,
} nsh_input_error_t;
#define foreach_nsh_input_next \
_(DROP, "error-drop") \
_(ENCAP_GRE, "gre-input" ) \
_(ENCAP_VXLANGPE, "vxlan-gpe-encap" ) \
/* /\* TODO once moved to Project:NSH_SFC *\/ */
/* _(ENCAP_ETHERNET, "*** TX TO ETHERNET ***") \ */
/* _(DECAP_ETHERNET_LOOKUP, "ethernet-input" ) \ */
/* _(DECAP_IP4_INPUT, "ip4-input") \ */
/* _(DECAP_IP6_INPUT, "ip6-input" ) \ */
typedef enum {
#define _(s,n) NSH_INPUT_NEXT_##s,
foreach_nsh_input_next
#undef _
NSH_INPUT_N_NEXT,
} nsh_input_next_t;
#endif /* included_nsh_h */
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