IABSD.fr/src/usr.sbin/bgpctl/mrtparser.h

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• Author : claudio
  Date : 2024-02-01 11:37:10
  Hash : 6b941460
  Message : Convert the mrtparser to use ibufs in many places. More is possible but for now this covers most of the message parsers. OK tb@

• usr.sbin/bgpctl/mrtparser.h

• /*	$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);