/*
    pmacct (Promiscuous mode IP Accounting package)
    pmacct is Copyright (C) 2003-2016 by Paolo Lucente
*/

/*
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

/* includes */

/* defines */
#define BMP_TCP_PORT		1790
#define BMP_MAX_PEERS_DEFAULT	4
#define BMP_V3			3

#define BMP_MISSING_PEER_UP_LOG_TOUT	60

/* definitions originally based on draft-ietf-grow-bmp-07 */
/* definitions review #1 based on draft-ietf-grow-bmp-17 */

/* BMP message types */
#define BMP_MSG_ROUTE_MONITOR	0	
#define	BMP_MSG_STATS		1
#define BMP_MSG_PEER_DOWN	2
#define BMP_MSG_PEER_UP		3
#define	BMP_MSG_INIT		4
#define BMP_MSG_TERM		5
#define BMP_MSG_ROUTE_MIRROR	6	
#define BMP_MSG_TYPE_MAX	6 /* set to the highest BMP_MSG_* value */

static const char *bmp_msg_types[] = {
  "Route Monitoring",
  "Statistics Report",
  "Peer Down Notification",
  "Peer Up Notification",
  "Initiation Message",
  "Termination Message",
  "Route Mirroring"
};

struct bmp_common_hdr {
  u_char	version;
  u_int32_t	len;
  u_char	type;
} __attribute__ ((packed));

#define BMP_PEER_GLOBAL		0
#define BMP_PEER_L3VPN		1


struct bmp_peer_hdr {
  u_char	type;
  u_char	flags;
  u_char	rd[RD_LEN];
  u_int32_t	addr[4];
  u_int32_t	asn;
  u_int32_t	bgp_id;
  u_int32_t	tstamp_sec;
  u_int32_t	tstamp_usec;
} __attribute__ ((packed));

#define BMP_INIT_INFO_STRING	0
#define BMP_INIT_INFO_SYSDESCR	1
#define BMP_INIT_INFO_SYSNAME	2

struct bmp_init_hdr {
  u_int16_t	type;
  u_int16_t	len;
} __attribute__ ((packed));

#define BMP_TERM_INFO_STRING    0
#define BMP_TERM_INFO_REASON	1

#define BMP_TERM_REASON_ADM	0
#define BMP_TERM_REASON_UNK	1
#define BMP_TERM_REASON_OOR	2
#define BMP_TERM_REASON_DUP	3
#define BMP_TERM_REASON_MAX	3 /* set to the highest BMP_TERM_* value */

static const char *bmp_term_reason_types[] = {
  "Session administratively closed",
  "Unspecified reason",
  "Out of resources",
  "Redundant connection"
};

struct bmp_term_hdr {
  u_int16_t     type;
  u_int16_t     len;
} __attribute__ ((packed));

struct bmp_stats_hdr {
  u_int32_t	count;
} __attribute__ ((packed));

struct bmp_peer {
  struct bgp_peer self;
  void *bgp_peers;
  struct log_notification missing_peer_up;
};

#define BMP_STATS_TYPE0		0 /* (32-bit Counter) Number of prefixes rejected by inbound policy */
#define BMP_STATS_TYPE1		1 /* (32-bit Counter) Number of (known) duplicate prefix advertisements */
#define BMP_STATS_TYPE2		2 /* (32-bit Counter) Number of (known) duplicate withdraws */
#define BMP_STATS_TYPE3		3 /* (32-bit Counter) Number of updates invalidated due to CLUSTER_LIST loop */
#define BMP_STATS_TYPE4		4 /* (32-bit Counter) Number of updates invalidated due to AS_PATH loop */
#define BMP_STATS_TYPE5		5 /* (32-bit Counter) Number of updates invalidated due to ORIGINATOR_ID */ 
#define BMP_STATS_TYPE6		6 /* (32-bit Counter) Number of updates invalidated due to AS_CONFED loop */
#define BMP_STATS_TYPE7		7 /* (64-bit Gauge) Number of routes in Adj-RIBs-In */
#define BMP_STATS_TYPE8		8 /* (64-bit Gauge) Number of routes in Loc-RIB */
#define BMP_STATS_MAX		8 /* set to the highest BMP_STATS_* value */

static const char *bmp_stats_cnt_types[] = {
  "Number of prefixes rejected by inbound policy",
  "Number of (known) duplicate prefix advertisements",
  "Number of (known) duplicate withdraws",
  "Number of updates invalidated due to CLUSTER_LIST loop",
  "Number of updates invalidated due to AS_PATH loop",
  "Number of updates invalidated due to ORIGINATOR_ID",
  "Number of updates invalidated due to AS_CONFED loop",
  "Number of routes in Adj-RIBs-In",
  "Number of routes in Loc-RIB"
}; 

struct bmp_stats_cnt_hdr {
  u_int16_t	type;
  u_int16_t	len;
} __attribute__ ((packed));

#define BMP_PEER_DOWN_LOC_NOT_MSG	1
#define BMP_PEER_DOWN_LOC_CODE		2
#define BMP_PEER_DOWN_REM_NOT_MSG	3
#define BMP_PEER_DOWN_REM_CODE		4

struct bmp_peer_down_hdr {
  u_char	reason;
} __attribute__ ((packed));

struct bmp_peer_up_hdr {
  u_int32_t	loc_addr[4];
  u_int16_t	loc_port;
  u_int16_t	rem_port;
  /* Sent OPEN Message */
  /* Received OPEN Message */
} __attribute__ ((packed));

struct bmp_data {
  u_int8_t family;
  struct host_addr peer_ip;
  struct host_addr bgp_id;
  u_int32_t peer_asn;
  u_int8_t peer_type;
  struct timeval tstamp;
};

/* more includes */
#include "bmp_logdump.h"
#include "bmp_msg.h"
#include "bmp_util.h"
#include "bmp_lookup.h"

/* prototypes */
#if !defined(__BMP_C)
#define EXT extern
#else
#define EXT
#endif
EXT void nfacctd_bmp_wrapper();
EXT void skinny_bmp_daemon();
#undef EXT

/* global variables */
#if !defined(__BMP_C)
#define EXT extern
#else
#define EXT
#endif
EXT struct bmp_peer *bmp_peers;
EXT u_int32_t (*bmp_route_info_modulo)(struct bgp_peer *, path_id_t *);

EXT struct bgp_rt_structs *bmp_routing_db;
EXT struct bgp_misc_structs *bmp_misc_db;
#undef EXT
