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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_vnet_sr_h
#define included_vnet_sr_h
#include <vnet/vnet.h>
#include <vnet/sr/sr_packet.h>
#include <vnet/ip/ip6_packet.h>
#include <openssl/opensslconf.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/crypto.h>
#include <openssl/sha.h>
#include <openssl/opensslv.h>
#include <openssl/hmac.h>
typedef struct {
ip6_address_t src;
ip6_address_t dst;
} ip6_sr_tunnel_key_t;
typedef struct {
/* src, dst address */
ip6_sr_tunnel_key_t key;
/* mask width for FIB entry */
u32 dst_mask_width;
/* first hop, to save 1 elt in the segment list */
ip6_address_t first_hop;
/* Fib indices */
u32 rx_fib_index;
u32 tx_fib_index;
/* The actual ip6 sr header */
u8 * rewrite;
} ip6_sr_tunnel_t;
typedef struct {
u8 * shared_secret;
} ip6_sr_hmac_key_t;
typedef struct {
/* Key (header imposition case) */
ip6_address_t *src_address;
ip6_address_t *dst_address;
u32 dst_mask_width;
u32 rx_table_id;
u32 tx_table_id;
/* segment list, when inserting an ip6 SR header*/
ip6_address_t *segments;
/*
* "Tag" list, aka segments inserted at the end of the list,
* past last_seg
*/
ip6_address_t *tags;
/* Shared secret => generate SHA-256 HMAC security fields */
u8 * shared_secret;
/* Flags, e.g. cleanup, policy-list flags */
u16 flags_net_byte_order;
/* Delete the tunnnel? */
u8 is_del;
} ip6_sr_add_del_tunnel_args_t;
typedef struct {
/* pool of tunnel instances, sr entry only */
ip6_sr_tunnel_t *tunnels;
/* find an sr "tunnel" by its outer-IP src/dst */
uword * tunnel_index_by_key;
/* ip6-lookup next index for imposition FIB entries */
u32 ip6_lookup_sr_next_index;
/* hmac key id by shared secret */
uword * hmac_key_by_shared_secret;
/* ip6-rewrite next index for reinstalling the original dst address */
u32 ip6_rewrite_sr_next_index;
/* application API callback */
void *sr_local_cb;
/* validate hmac keys */
u8 validate_hmac;
/* pool of hmac keys */
ip6_sr_hmac_key_t * hmac_keys;
/* Openssl vbls */
EVP_MD * md;
HMAC_CTX * hmac_ctx;
/* enable debug spew */
u8 is_debug;
/* convenience */
vlib_main_t * vlib_main;
vnet_main_t * vnet_main;
} ip6_sr_main_t;
ip6_sr_main_t sr_main;
format_function_t format_ip6_sr_header;
format_function_t format_ip6_sr_header_with_length;
vlib_node_registration_t ip6_sr_input_node;
int ip6_sr_add_del_tunnel (ip6_sr_add_del_tunnel_args_t * a);
void vnet_register_sr_app_callback (void *cb);
#endif /* included_vnet_sr_h */
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