/*      $OpenBSD: mrtparser.h,v 1.7 2024/02/01 11:37:10 claudio Exp $ */
/*
 * Copyright (c) 2011 Claudio Jeker <claudio@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "bgpd.h"

/* data structures for the MSG_TABLE_DUMP_V2 format */
struct mrt_peer_entry {
        struct bgpd_addr        addr;
        uint32_t                bgp_id;
        uint32_t                asnum;
};

struct mrt_peer {
        char                    *view;
        struct mrt_peer_entry   *peers;
        uint32_t                 bgp_id;
        uint16_t                 npeers;
};

struct mrt_attr {
        void    *attr;
        size_t   attr_len;
};

struct mrt_rib_entry {
        void            *aspath;
        struct mrt_attr *attrs;
        struct bgpd_addr nexthop;
        time_t           originated;
        uint32_t         local_pref;
        uint32_t         med;
        uint32_t         path_id;
        uint16_t         peer_idx;
        uint16_t         aspath_len;
        uint16_t         nattrs;
        uint8_t          origin;
};

struct mrt_rib {
        struct mrt_rib_entry    *entries;
        struct bgpd_addr         prefix;
        uint32_t                 seqnum;
        uint16_t                 nentries;
        uint8_t                  prefixlen;
        uint8_t                  add_path;
};

/* data structures for the BGP4MP MESSAGE and STATE types */
struct mrt_bgp_state {
        struct timespec         time;
        struct bgpd_addr        src;
        struct bgpd_addr        dst;
        uint32_t                src_as;
        uint32_t                dst_as;
        uint16_t                old_state;
        uint16_t                new_state;
};

struct mrt_bgp_msg {
        struct timespec  time;
        struct bgpd_addr src;
        struct bgpd_addr dst;
        uint32_t         src_as;
        uint32_t         dst_as;
        uint8_t          add_path;
        struct ibuf      msg;
};

#define MRT_ATTR_ORIGIN         1
#define MRT_ATTR_ASPATH         2
#define MRT_ATTR_NEXTHOP        3
#define MRT_ATTR_MED            4
#define MRT_ATTR_LOCALPREF      5
#define MRT_ATTR_MP_REACH_NLRI  14
#define MRT_ATTR_AS4PATH        17
#define MRT_ATTR_EXTLEN         0x10

#define MRT_PREFIX_LEN(x)       ((((u_int)x) + 7) / 8)

struct mrt_parser {
        void    (*dump)(struct mrt_rib *, struct mrt_peer *, void *);
        void    (*state)(struct mrt_bgp_state *, void *);
        void    (*message)(struct mrt_bgp_msg *, void *);
        void    *arg;
};

void    mrt_parse(int, struct mrt_parser *, int);