oam.h

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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_oam_h__
#define __included_oam_h__

#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
#include <vnet/interface.h>

/* 36 octets, make a note of it... */
typedef CLIB_PACKED(struct {
    ip4_header_t ip4;
    icmp46_header_t icmp;
    u16 id;
    u16 seq;
    u8 data[8];
}) oam_template_t;

typedef CLIB_PACKED(struct {
    u64 v8[4];
    u32 v4;
}) oam_template_copy_t;

typedef enum {
    OAM_STATE_UNKNOWN = 0,
    OAM_STATE_ALIVE,
    OAM_STATE_DEAD,
} oam_state_t;

typedef struct {
    ip4_address_t src_address;
    ip4_address_t dst_address;
    u32 fib_id;
    u32 fib_index;
    f64 last_heard_time;
    u16 seq;
    u16 last_heard_seq;
    u16 id;
    u8 state;
    oam_template_t * template;
} oam_target_t;

typedef struct {
    /* OAM targets */
    oam_target_t * targets;
    uword * target_by_address_and_fib_id;

    /* Config parameters */
    f64 interval;
    u32 misses_allowed;

    /* random number seed */
    u32 random_seed;
    u16 icmp_id;

    /* oam packet template */
    vlib_packet_template_t packet_template;

    /* convenience */
    vlib_main_t * vlib_main;
    vnet_main_t * vnet_main;
} oam_main_t;

int vpe_oam_add_del_target (ip4_address_t *src_address, 
                            ip4_address_t *dst_address, 
                            u32 fib_id, int is_add);

#endif /* __included_oam_h__ */