Initial revision

1 files changed, 824 insertions, 0 deletions

diff --git a/bgpd/bgpd.h b/bgpd/bgpd.h
new file mode 100644
index 00000000..01d47212
--- /dev/null
+++ b/bgpd/bgpd.h
@@ -0,0 +1,824 @@
+/* BGP message definition header.
+   Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
+
+This file is part of GNU Zebra.
+
+GNU Zebra 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, or (at your option) any
+later version.
+
+GNU Zebra 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 GNU Zebra; see the file COPYING.  If not, write to the Free
+Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.  */
+
+/* For union sockunion.  */
+#include "sockunion.h"
+
+/* Typedef BGP specific types.  */
+typedef u_int16_t as_t;
+typedef u_int16_t bgp_size_t;
+
+/* BGP master for system wide configurations and variables.  */
+struct bgp_master
+{
+  /* BGP instance list.  */
+  struct list *bgp;
+
+  /* BGP thread master.  */
+  struct thread_master *master;
+
+  /* BGP port number.  */
+  u_int16_t port;
+
+  /* BGP start time.  */
+  time_t start_time;
+
+  /* Various BGP global configuration.  */
+  u_char options;
+#define BGP_OPT_NO_FIB                   (1 << 0)
+#define BGP_OPT_MULTIPLE_INSTANCE        (1 << 1)
+#define BGP_OPT_CONFIG_CISCO             (1 << 2)
+};
+
+/* BGP instance structure.  */
+struct bgp 
+{
+  /* AS number of this BGP instance.  */
+  as_t as;
+
+  /* Name of this BGP instance.  */
+  char *name;
+
+  /* Self peer.  */
+  struct peer *peer_self;
+
+  /* BGP peer. */
+  struct list *peer;
+
+  /* BGP peer group.  */
+  struct list *group;
+
+  /* BGP configuration.  */
+  u_int16_t config;
+#define BGP_CONFIG_ROUTER_ID              (1 << 0)
+#define BGP_CONFIG_CLUSTER_ID             (1 << 1)
+#define BGP_CONFIG_CONFEDERATION          (1 << 2)
+#define BGP_CONFIG_DEFAULT_LOCAL_PREF     (1 << 3)
+
+  /* BGP router identifier.  */
+  struct in_addr router_id;
+
+  /* BGP route reflector cluster ID.  */
+  struct in_addr cluster_id;
+
+  /* BGP confederation information.  */
+  as_t confed_id;
+  as_t *confed_peers;
+  int confed_peers_cnt;
+
+  /* BGP flags. */
+  u_int16_t flags;
+#define BGP_FLAG_ALWAYS_COMPARE_MED       (1 << 0)
+#define BGP_FLAG_DETERMINISTIC_MED        (1 << 1)
+#define BGP_FLAG_MED_MISSING_AS_WORST     (1 << 2)
+#define BGP_FLAG_MED_CONFED               (1 << 3)
+#define BGP_FLAG_NO_DEFAULT_IPV4          (1 << 4)
+#define BGP_FLAG_NO_CLIENT_TO_CLIENT      (1 << 5)
+#define BGP_FLAG_ENFORCE_FIRST_AS         (1 << 6)
+#define BGP_FLAG_COMPARE_ROUTER_ID        (1 << 7)
+#define BGP_FLAG_ASPATH_IGNORE            (1 << 8)
+#define BGP_FLAG_IMPORT_CHECK             (1 << 9)
+#define BGP_FLAG_NO_FAST_EXT_FAILOVER     (1 << 10)
+
+  /* BGP Per AF flags */
+  u_int16_t af_flags[AFI_MAX][SAFI_MAX];
+#define BGP_CONFIG_DAMPENING              (1 << 0)
+
+  /* Static route configuration.  */
+  struct bgp_table *route[AFI_MAX][SAFI_MAX];
+
+  /* Aggregate address configuration.  */
+  struct bgp_table *aggregate[AFI_MAX][SAFI_MAX];
+
+  /* BGP routing information base.  */
+  struct bgp_table *rib[AFI_MAX][SAFI_MAX];
+
+  /* BGP redistribute configuration. */
+  u_char redist[AFI_MAX][ZEBRA_ROUTE_MAX];
+
+  /* BGP redistribute metric configuration. */
+  u_char redist_metric_flag[AFI_MAX][ZEBRA_ROUTE_MAX];
+  u_int32_t redist_metric[AFI_MAX][ZEBRA_ROUTE_MAX];
+
+  /* BGP redistribute route-map.  */
+  struct
+  {
+    char *name;
+    struct route_map *map;
+  } rmap[AFI_MAX][ZEBRA_ROUTE_MAX];
+
+  /* BGP distance configuration.  */
+  u_char distance_ebgp;
+  u_char distance_ibgp;
+  u_char distance_local;
+  
+  /* BGP default local-preference.  */
+  u_int32_t default_local_pref;
+
+  /* BGP default timer.  */
+  u_int32_t default_holdtime;
+  u_int32_t default_keepalive;
+};
+
+/* BGP peer-group support. */
+struct peer_group
+{
+  /* Name of the peer-group. */
+  char *name;
+
+  /* Pointer to BGP.  */
+  struct bgp *bgp;
+  
+  /* Peer-group client list. */
+  struct list *peer;
+
+  /* Peer-group config */
+  struct peer *conf;
+};
+
+/* BGP Notify message format. */
+struct bgp_notify 
+{
+  u_char code;
+  u_char subcode;
+  char *data;
+  bgp_size_t length;
+};
+
+/* Next hop self address. */
+struct bgp_nexthop
+{
+  struct interface *ifp;
+  struct in_addr v4;
+#ifdef HAVE_IPV6
+  struct in6_addr v6_global;
+  struct in6_addr v6_local;
+#endif /* HAVE_IPV6 */  
+};
+
+/* BGP router distinguisher value.  */
+#define BGP_RD_SIZE                8
+
+struct bgp_rd
+{
+  u_char val[BGP_RD_SIZE];
+};
+
+/* BGP filter structure. */
+struct bgp_filter
+{
+  /* Distribute-list.  */
+  struct 
+  {
+    char *name;
+    struct access_list *alist;
+  } dlist[FILTER_MAX];
+
+  /* Prefix-list.  */
+  struct
+  {
+    char *name;
+    struct prefix_list *plist;
+  } plist[FILTER_MAX];
+
+  /* Filter-list.  */
+  struct
+  {
+    char *name;
+    struct as_list *aslist;
+  } aslist[FILTER_MAX];
+
+  /* Route-map.  */
+  struct
+  {
+    char *name;
+    struct route_map *map;
+  } map[FILTER_MAX];
+
+  /* Unsuppress-map.  */
+  struct
+  {
+    char *name;
+    struct route_map *map;
+  } usmap;
+};
+
+/* BGP neighbor structure. */
+struct peer
+{
+  /* BGP structure.  */
+  struct bgp *bgp;
+
+  /* BGP peer group.  */
+  struct peer_group *group;
+  u_char af_group[AFI_MAX][SAFI_MAX];
+
+  /* Peer's remote AS number. */
+  as_t as;			
+
+  /* Peer's local AS number. */
+  as_t local_as;
+
+  /* Peer's Change local AS number. */
+  as_t change_local_as;
+
+  /* Remote router ID. */
+  struct in_addr remote_id;
+
+  /* Local router ID. */
+  struct in_addr local_id;
+
+  /* Packet receive and send buffer. */
+  struct stream *ibuf;
+  struct stream_fifo *obuf;
+  struct stream *work;
+
+  /* Status of the peer. */
+  int status;
+  int ostatus;
+
+  /* Peer information */
+  int fd;			/* File descriptor */
+  int ttl;			/* TTL of TCP connection to the peer. */
+  char *desc;			/* Description of the peer. */
+  unsigned short port;          /* Destination port for peer */
+  char *host;			/* Printable address of the peer. */
+  union sockunion su;		/* Sockunion address of the peer. */
+  time_t uptime;		/* Last Up/Down time */
+  time_t readtime;		/* Last read time */
+  
+  unsigned int ifindex;		/* ifindex of the BGP connection. */
+  char *ifname;			/* bind interface name. */
+  char *update_if;
+  union sockunion *update_source;
+  struct zlog *log;
+  u_char version;		/* Peer BGP version. */
+
+  union sockunion *su_local;	/* Sockunion of local address.  */
+  union sockunion *su_remote;	/* Sockunion of remote address.  */
+  int shared_network;		/* Is this peer shared same network. */
+  struct bgp_nexthop nexthop;	/* Nexthop */
+
+  /* Peer address family configuration. */
+  u_char afc[AFI_MAX][SAFI_MAX];
+  u_char afc_nego[AFI_MAX][SAFI_MAX];
+  u_char afc_adv[AFI_MAX][SAFI_MAX];
+  u_char afc_recv[AFI_MAX][SAFI_MAX];
+
+  /* Capability Flags.*/
+  u_char cap;
+#define PEER_CAP_REFRESH_ADV                (1 << 0) /* refresh advertised */
+#define PEER_CAP_REFRESH_OLD_RCV            (1 << 1) /* refresh old received */
+#define PEER_CAP_REFRESH_NEW_RCV            (1 << 2) /* refresh rfc received */
+#define PEER_CAP_DYNAMIC_ADV                (1 << 3) /* dynamic advertised */
+#define PEER_CAP_DYNAMIC_RCV                (1 << 4) /* dynamic received */
+
+  /* Capability Flags.*/
+  u_int16_t af_cap[AFI_MAX][SAFI_MAX];
+#define PEER_CAP_ORF_PREFIX_SM_ADV          (1 << 0) /* send-mode advertised */
+#define PEER_CAP_ORF_PREFIX_RM_ADV          (1 << 1) /* receive-mode advertised */
+#define PEER_CAP_ORF_PREFIX_SM_RCV          (1 << 2) /* send-mode received */
+#define PEER_CAP_ORF_PREFIX_RM_RCV          (1 << 3) /* receive-mode received */
+#define PEER_CAP_ORF_PREFIX_SM_OLD_RCV      (1 << 4) /* send-mode received */
+#define PEER_CAP_ORF_PREFIX_RM_OLD_RCV      (1 << 5) /* receive-mode received */
+
+  /* Global configuration flags. */
+  u_int32_t flags;
+#define PEER_FLAG_PASSIVE                   (1 << 0) /* passive mode */
+#define PEER_FLAG_SHUTDOWN                  (1 << 1) /* shutdown */
+#define PEER_FLAG_DONT_CAPABILITY           (1 << 2) /* dont-capability */
+#define PEER_FLAG_OVERRIDE_CAPABILITY       (1 << 3) /* override-capability */
+#define PEER_FLAG_STRICT_CAP_MATCH          (1 << 4) /* strict-match */
+#define PEER_FLAG_NO_ROUTE_REFRESH_CAP      (1 << 5) /* route-refresh */
+#define PEER_FLAG_DYNAMIC_CAPABILITY        (1 << 6) /* dynamic capability */
+#define PEER_FLAG_ENFORCE_MULTIHOP          (1 << 7) /* enforce-multihop */
+#define PEER_FLAG_LOCAL_AS_NO_PREPEND       (1 << 8) /* local-as no-prepend */
+
+  /* Per AF configuration flags. */
+  u_int32_t af_flags[AFI_MAX][SAFI_MAX];
+#define PEER_FLAG_SEND_COMMUNITY            (1 << 0) /* send-community */
+#define PEER_FLAG_SEND_EXT_COMMUNITY        (1 << 1) /* send-community ext. */
+#define PEER_FLAG_NEXTHOP_SELF              (1 << 2) /* next-hop-self */
+#define PEER_FLAG_REFLECTOR_CLIENT          (1 << 3) /* reflector-client */
+#define PEER_FLAG_RSERVER_CLIENT            (1 << 4) /* route-server-client */
+#define PEER_FLAG_SOFT_RECONFIG             (1 << 5) /* soft-reconfiguration */
+#define PEER_FLAG_AS_PATH_UNCHANGED         (1 << 6) /* transparent-as */
+#define PEER_FLAG_NEXTHOP_UNCHANGED         (1 << 7) /* transparent-next-hop */
+#define PEER_FLAG_MED_UNCHANGED             (1 << 8) /* transparent-next-hop */
+#define PEER_FLAG_DEFAULT_ORIGINATE         (1 << 9) /* default-originate */
+#define PEER_FLAG_REMOVE_PRIVATE_AS         (1 << 10) /* remove-private-as */
+#define PEER_FLAG_ALLOWAS_IN                (1 << 11) /* set allowas-in */
+#define PEER_FLAG_ORF_PREFIX_SM             (1 << 12) /* orf capability send-mode */
+#define PEER_FLAG_ORF_PREFIX_RM             (1 << 13) /* orf capability receive-mode */
+#define PEER_FLAG_MAX_PREFIX                (1 << 14) /* maximum prefix */
+#define PEER_FLAG_MAX_PREFIX_WARNING        (1 << 15) /* maximum prefix warning-only */
+
+  /* default-originate route-map.  */
+  struct
+  {
+    char *name;
+    struct route_map *map;
+  } default_rmap[AFI_MAX][SAFI_MAX];
+
+  /* Peer status flags. */
+  u_int16_t sflags;
+#define PEER_STATUS_ACCEPT_PEER	      (1 << 0) /* accept peer */
+#define PEER_STATUS_PREFIX_OVERFLOW   (1 << 1) /* prefix-overflow */
+#define PEER_STATUS_CAPABILITY_OPEN   (1 << 2) /* capability open send */
+#define PEER_STATUS_HAVE_ACCEPT       (1 << 3) /* accept peer's parent */
+#define PEER_STATUS_GROUP             (1 << 4) /* peer-group conf */
+
+  /* Peer status af flags. */
+  u_int16_t af_sflags[AFI_MAX][SAFI_MAX];
+#define PEER_STATUS_ORF_PREFIX_SEND   (1 << 0) /* prefix-list send peer */
+#define PEER_STATUS_ORF_WAIT_REFRESH  (1 << 1) /* wait refresh received peer */
+#define PEER_STATUS_DEFAULT_ORIGINATE (1 << 2) /* default-originate peer */
+
+  /* Default attribute value for the peer. */
+  u_int32_t config;
+#define PEER_CONFIG_WEIGHT            (1 << 0) /* Default weight. */
+#define PEER_CONFIG_TIMER             (1 << 1) /* keepalive & holdtime */
+#define PEER_CONFIG_CONNECT           (1 << 2) /* connect */
+#define PEER_CONFIG_ROUTEADV          (1 << 3) /* route advertise */
+  u_int32_t weight;
+  u_int32_t holdtime;
+  u_int32_t keepalive;
+  u_int32_t connect;
+  u_int32_t routeadv;
+
+  /* Timer values. */
+  u_int32_t v_start;
+  u_int32_t v_connect;
+  u_int32_t v_holdtime;
+  u_int32_t v_keepalive;
+  u_int32_t v_asorig;
+  u_int32_t v_routeadv;
+
+  /* Threads. */
+  struct thread *t_read;
+  struct thread *t_write;
+  struct thread *t_start;
+  struct thread *t_connect;
+  struct thread *t_holdtime;
+  struct thread *t_keepalive;
+  struct thread *t_asorig;
+  struct thread *t_routeadv;
+
+  /* Statistics field */
+  u_int32_t open_in;		/* Open message input count */
+  u_int32_t open_out;		/* Open message output count */
+  u_int32_t update_in;		/* Update message input count */
+  u_int32_t update_out;		/* Update message ouput count */
+  time_t update_time;		/* Update message received time. */
+  u_int32_t keepalive_in;	/* Keepalive input count */
+  u_int32_t keepalive_out;	/* Keepalive output count */
+  u_int32_t notify_in;		/* Notify input count */
+  u_int32_t notify_out;		/* Notify output count */
+  u_int32_t refresh_in;		/* Route Refresh input count */
+  u_int32_t refresh_out;	/* Route Refresh output count */
+  u_int32_t dynamic_cap_in;	/* Dynamic Capability input count.  */
+  u_int32_t dynamic_cap_out;	/* Dynamic Capability output count.  */
+
+  /* BGP state count */
+  u_int32_t established;	/* Established */
+  u_int32_t dropped;		/* Dropped */
+
+  /* Syncronization list and time.  */
+  struct bgp_synchronize *sync[AFI_MAX][SAFI_MAX];
+  time_t synctime;
+
+  /* Send prefix count. */
+  unsigned long scount[AFI_MAX][SAFI_MAX];
+
+  /* Announcement attribute hash.  */
+  struct hash *hash[AFI_MAX][SAFI_MAX];
+
+  /* Notify data. */
+  struct bgp_notify notify;
+
+  /* Whole packet size to be read. */
+  unsigned long packet_size;
+
+  /* Filter structure. */
+  struct bgp_filter filter[AFI_MAX][SAFI_MAX];
+
+  /* ORF Prefix-list */
+  struct prefix_list *orf_plist[AFI_MAX][SAFI_MAX];
+
+  /* Prefix count. */
+  unsigned long pcount[AFI_MAX][SAFI_MAX];
+
+  /* Max prefix count. */
+  unsigned long pmax[AFI_MAX][SAFI_MAX];
+
+  /* allowas-in. */
+  char allowas_in[AFI_MAX][SAFI_MAX];
+};
+
+/* This structure's member directly points incoming packet data
+   stream. */
+struct bgp_nlri
+{
+  /* AFI.  */
+  afi_t afi;
+
+  /* SAFI.  */
+  safi_t safi;
+
+  /* Pointer to NLRI byte stream.  */
+  u_char *nlri;
+
+  /* Length of whole NLRI.  */
+  bgp_size_t length;
+};
+
+/* BGP versions.  */
+#define BGP_VERSION_4		                 4
+#define BGP_VERSION_MP_4_DRAFT_00               40
+
+/* Default BGP port number.  */
+#define BGP_PORT_DEFAULT                       179
+
+/* BGP message header and packet size.  */
+#define BGP_MARKER_SIZE		                16
+#define BGP_HEADER_SIZE		                19
+#define BGP_MAX_PACKET_SIZE                   4096
+
+/* BGP minimum message size.  */
+#define BGP_MSG_OPEN_MIN_SIZE                   (BGP_HEADER_SIZE + 10)
+#define BGP_MSG_UPDATE_MIN_SIZE                 (BGP_HEADER_SIZE + 4)
+#define BGP_MSG_NOTIFY_MIN_SIZE                 (BGP_HEADER_SIZE + 2)
+#define BGP_MSG_KEEPALIVE_MIN_SIZE              (BGP_HEADER_SIZE + 0)
+#define BGP_MSG_ROUTE_REFRESH_MIN_SIZE          (BGP_HEADER_SIZE + 4)
+#define BGP_MSG_CAPABILITY_MIN_SIZE             (BGP_HEADER_SIZE + 3)
+
+/* BGP message types.  */
+#define	BGP_MSG_OPEN		                 1
+#define	BGP_MSG_UPDATE		                 2
+#define	BGP_MSG_NOTIFY		                 3
+#define	BGP_MSG_KEEPALIVE	                 4
+#define BGP_MSG_ROUTE_REFRESH_NEW                5
+#define BGP_MSG_CAPABILITY                       6
+#define BGP_MSG_ROUTE_REFRESH_OLD              128
+
+/* BGP open optional parameter.  */
+#define BGP_OPEN_OPT_AUTH                        1
+#define BGP_OPEN_OPT_CAP                         2
+
+/* BGP4 attribute type codes.  */
+#define BGP_ATTR_ORIGIN                          1
+#define BGP_ATTR_AS_PATH                         2
+#define BGP_ATTR_NEXT_HOP                        3
+#define BGP_ATTR_MULTI_EXIT_DISC                 4
+#define BGP_ATTR_LOCAL_PREF                      5
+#define BGP_ATTR_ATOMIC_AGGREGATE                6
+#define BGP_ATTR_AGGREGATOR                      7
+#define BGP_ATTR_COMMUNITIES                     8
+#define BGP_ATTR_ORIGINATOR_ID                   9
+#define BGP_ATTR_CLUSTER_LIST                   10
+#define BGP_ATTR_DPA                            11
+#define BGP_ATTR_ADVERTISER                     12
+#define BGP_ATTR_RCID_PATH                      13
+#define BGP_ATTR_MP_REACH_NLRI                  14
+#define BGP_ATTR_MP_UNREACH_NLRI                15
+#define BGP_ATTR_EXT_COMMUNITIES                16
+
+/* BGP update origin.  */
+#define BGP_ORIGIN_IGP                           0
+#define BGP_ORIGIN_EGP                           1
+#define BGP_ORIGIN_INCOMPLETE                    2
+
+/* BGP notify message codes.  */
+#define BGP_NOTIFY_HEADER_ERR                    1
+#define BGP_NOTIFY_OPEN_ERR                      2
+#define BGP_NOTIFY_UPDATE_ERR                    3
+#define BGP_NOTIFY_HOLD_ERR                      4
+#define BGP_NOTIFY_FSM_ERR                       5
+#define BGP_NOTIFY_CEASE                         6
+#define BGP_NOTIFY_CAPABILITY_ERR                7
+#define BGP_NOTIFY_MAX	                         8
+
+/* BGP_NOTIFY_HEADER_ERR sub codes.  */
+#define BGP_NOTIFY_HEADER_NOT_SYNC               1
+#define BGP_NOTIFY_HEADER_BAD_MESLEN             2
+#define BGP_NOTIFY_HEADER_BAD_MESTYPE            3
+#define BGP_NOTIFY_HEADER_MAX                    4
+
+/* BGP_NOTIFY_OPEN_ERR sub codes.  */
+#define BGP_NOTIFY_OPEN_UNSUP_VERSION            1
+#define BGP_NOTIFY_OPEN_BAD_PEER_AS              2
+#define BGP_NOTIFY_OPEN_BAD_BGP_IDENT            3
+#define BGP_NOTIFY_OPEN_UNSUP_PARAM              4
+#define BGP_NOTIFY_OPEN_AUTH_FAILURE             5
+#define BGP_NOTIFY_OPEN_UNACEP_HOLDTIME          6
+#define BGP_NOTIFY_OPEN_UNSUP_CAPBL              7
+#define BGP_NOTIFY_OPEN_MAX                      8
+
+/* BGP_NOTIFY_UPDATE_ERR sub codes.  */
+#define BGP_NOTIFY_UPDATE_MAL_ATTR               1
+#define BGP_NOTIFY_UPDATE_UNREC_ATTR             2
+#define BGP_NOTIFY_UPDATE_MISS_ATTR              3
+#define BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR          4
+#define BGP_NOTIFY_UPDATE_ATTR_LENG_ERR          5
+#define BGP_NOTIFY_UPDATE_INVAL_ORIGIN           6
+#define BGP_NOTIFY_UPDATE_AS_ROUTE_LOOP          7
+#define BGP_NOTIFY_UPDATE_INVAL_NEXT_HOP         8
+#define BGP_NOTIFY_UPDATE_OPT_ATTR_ERR           9
+#define BGP_NOTIFY_UPDATE_INVAL_NETWORK         10
+#define BGP_NOTIFY_UPDATE_MAL_AS_PATH           11
+#define BGP_NOTIFY_UPDATE_MAX                   12
+
+/* BGP_NOTIFY_CEASE sub codes (draft-ietf-idr-cease-subcode-00).  */
+#define BGP_NOTIFY_CEASE_MAX_PREFIX              1
+#define BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN          2
+#define BGP_NOTIFY_CEASE_PEER_UNCONFIG           3
+#define BGP_NOTIFY_CEASE_ADMIN_RESET             4
+#define BGP_NOTIFY_CEASE_CONNECT_REJECT          5
+#define BGP_NOTIFY_CEASE_CONFIG_CHANGE           6
+#define BGP_NOTIFY_CEASE_MAX                     7
+
+/* BGP_NOTIFY_CAPABILITY_ERR sub codes (draft-ietf-idr-dynamic-cap-02). */
+#define BGP_NOTIFY_CAPABILITY_INVALID_ACTION     1
+#define BGP_NOTIFY_CAPABILITY_INVALID_LENGTH     2
+#define BGP_NOTIFY_CAPABILITY_MALFORMED_CODE     3
+#define BGP_NOTIFY_CAPABILITY_MAX                4
+
+/* BGP finite state machine status.  */
+#define Idle                                     1
+#define Connect                                  2
+#define Active                                   3
+#define OpenSent                                 4
+#define OpenConfirm                              5
+#define Established                              6
+#define BGP_STATUS_MAX                           7
+
+/* BGP finite state machine events.  */
+#define BGP_Start                                1
+#define BGP_Stop                                 2
+#define TCP_connection_open                      3
+#define TCP_connection_closed                    4
+#define TCP_connection_open_failed               5
+#define TCP_fatal_error                          6
+#define ConnectRetry_timer_expired               7
+#define Hold_Timer_expired                       8
+#define KeepAlive_timer_expired                  9
+#define Receive_OPEN_message                    10
+#define Receive_KEEPALIVE_message               11
+#define Receive_UPDATE_message                  12
+#define Receive_NOTIFICATION_message            13
+#define BGP_EVENTS_MAX                          14
+
+/* BGP timers default value.  */
+#define BGP_INIT_START_TIMER                     5
+#define BGP_ERROR_START_TIMER                   30
+#define BGP_DEFAULT_HOLDTIME                   180
+#define BGP_DEFAULT_KEEPALIVE                   60 
+#define BGP_DEFAULT_ASORIGINATE                 15
+#define BGP_DEFAULT_EBGP_ROUTEADV               30
+#define BGP_DEFAULT_IBGP_ROUTEADV                5
+#define BGP_CLEAR_CONNECT_RETRY                 20
+#define BGP_DEFAULT_CONNECT_RETRY              120
+
+/* BGP default local preference.  */
+#define BGP_DEFAULT_LOCAL_PREF                 100
+
+/* SAFI which used in open capability negotiation.  */
+#define BGP_SAFI_VPNV4                         128
+#define BGP_SAFI_VPNV6                         129
+
+/* Max TTL value.  */
+#define TTL_MAX                                255
+
+/* BGP uptime string length.  */
+#define BGP_UPTIME_LEN 25
+
+/* Default configuration settings for bgpd.  */
+#define BGP_VTY_PORT                          2605
+#define BGP_VTYSH_PATH                "/tmp/.bgpd"
+#define BGP_DEFAULT_CONFIG             "bgpd.conf"
+
+/* Check AS path loop when we send NLRI.  */
+/* #define BGP_SEND_ASPATH_CHECK */
+
+/* IBGP/EBGP identifier.  We also have a CONFED peer, which is to say,
+   a peer who's AS is part of our Confederation.  */
+enum
+{
+  BGP_PEER_IBGP,
+  BGP_PEER_EBGP,
+  BGP_PEER_INTERNAL,
+  BGP_PEER_CONFED
+};
+
+/* Flag for peer_clear_soft().  */
+enum bgp_clear_type
+{
+  BGP_CLEAR_SOFT_NONE,
+  BGP_CLEAR_SOFT_OUT,
+  BGP_CLEAR_SOFT_IN,
+  BGP_CLEAR_SOFT_BOTH,
+  BGP_CLEAR_SOFT_IN_ORF_PREFIX
+};
+
+/* Macros. */
+#define BGP_INPUT(P)         ((P)->ibuf)
+#define BGP_INPUT_PNT(P)     (STREAM_PNT(BGP_INPUT(P)))
+
+/* Macro to check BGP information is alive or not.  */
+#define BGP_INFO_HOLDDOWN(BI)                         \
+  (! CHECK_FLAG ((BI)->flags, BGP_INFO_VALID)         \
+   || CHECK_FLAG ((BI)->flags, BGP_INFO_HISTORY)      \
+   || CHECK_FLAG ((BI)->flags, BGP_INFO_DAMPED))
+
+/* Count prefix size from mask length */
+#define PSIZE(a) (((a) + 7) / (8))
+
+/* BGP error codes.  */
+#define BGP_SUCCESS                               0
+#define BGP_ERR_INVALID_VALUE                    -1
+#define BGP_ERR_INVALID_FLAG                     -2
+#define BGP_ERR_INVALID_AS                       -3
+#define BGP_ERR_INVALID_BGP                      -4
+#define BGP_ERR_PEER_GROUP_MEMBER                -5
+#define BGP_ERR_MULTIPLE_INSTANCE_USED           -6
+#define BGP_ERR_PEER_GROUP_MEMBER_EXISTS         -7
+#define BGP_ERR_PEER_BELONGS_TO_GROUP            -8
+#define BGP_ERR_PEER_GROUP_AF_UNCONFIGURED       -9
+#define BGP_ERR_PEER_GROUP_NO_REMOTE_AS         -10
+#define BGP_ERR_PEER_GROUP_CANT_CHANGE          -11
+#define BGP_ERR_PEER_GROUP_MISMATCH             -12
+#define BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT  -13
+#define BGP_ERR_MULTIPLE_INSTANCE_NOT_SET       -14
+#define BGP_ERR_AS_MISMATCH                     -15
+#define BGP_ERR_PEER_INACTIVE                   -16
+#define BGP_ERR_INVALID_FOR_PEER_GROUP_MEMBER   -17
+#define BGP_ERR_PEER_GROUP_HAS_THE_FLAG         -18
+#define BGP_ERR_PEER_FLAG_CONFLICT              -19
+#define BGP_ERR_PEER_GROUP_SHUTDOWN             -20
+#define BGP_ERR_PEER_FILTER_CONFLICT            -21
+#define BGP_ERR_NOT_INTERNAL_PEER               -22
+#define BGP_ERR_REMOVE_PRIVATE_AS               -23
+#define BGP_ERR_AF_UNCONFIGURED                 -24
+#define BGP_ERR_SOFT_RECONFIG_UNCONFIGURED      -25
+#define BGP_ERR_INSTANCE_MISMATCH               -26
+#define BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP  -27
+#define BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS    -28
+#define BGP_ERR_MAX                             -29
+
+extern struct bgp_master *bm;
+
+extern struct thread_master *master;
+
+/* Prototypes. */
+void bgp_terminate (void);
+void bgp_reset (void);
+void bgp_zclient_reset ();
+int bgp_nexthop_set (union sockunion *, union sockunion *, 
+		     struct bgp_nexthop *, struct peer *);
+struct bgp *bgp_get_default ();
+struct bgp *bgp_lookup (as_t, char *);
+struct bgp *bgp_lookup_by_name (char *);
+struct peer *peer_lookup (struct bgp *, union sockunion *);
+struct peer_group *peer_group_lookup (struct bgp *, char *);
+struct peer_group *peer_group_get (struct bgp *, char *);
+struct peer *peer_lookup_with_open (union sockunion *, as_t, struct in_addr *,
+				    int *);
+int peer_sort (struct peer *peer);
+int peer_active (struct peer *);
+int peer_active_nego (struct peer *);
+struct peer *peer_create_accept (struct bgp *);
+char *peer_uptime (time_t, char *, size_t);
+void bgp_config_write_family_header (struct vty *, afi_t, safi_t, int *);
+
+void bgp_master_init ();
+
+void bgp_init ();
+
+int bgp_option_set (int);
+int bgp_option_unset (int);
+int bgp_option_check (int);
+
+int bgp_get (struct bgp **, as_t *, char *);
+int bgp_delete (struct bgp *);
+
+int bgp_flag_set (struct bgp *, int);
+int bgp_flag_unset (struct bgp *, int);
+int bgp_flag_check (struct bgp *, int);
+
+int bgp_router_id_set (struct bgp *, struct in_addr *);
+int bgp_router_id_unset (struct bgp *);
+
+int bgp_cluster_id_set (struct bgp *, struct in_addr *);
+int bgp_cluster_id_unset (struct bgp *);
+
+int bgp_confederation_id_set (struct bgp *, as_t);
+int bgp_confederation_id_unset (struct bgp *);
+int bgp_confederation_peers_check (struct bgp *, as_t);
+
+int bgp_confederation_peers_add (struct bgp *, as_t);
+int bgp_confederation_peers_remove (struct bgp *, as_t);
+
+int bgp_timers_set (struct bgp *, u_int32_t, u_int32_t);
+int bgp_timers_unset (struct bgp *);
+
+int bgp_default_local_preference_set (struct bgp *, u_int32_t);
+int bgp_default_local_preference_unset (struct bgp *);
+
+int peer_remote_as (struct bgp *, union sockunion *, as_t *, afi_t, safi_t);
+int peer_group_remote_as (struct bgp *, char *, as_t *);
+int peer_delete (struct peer *peer);
+int peer_group_delete (struct peer_group *);
+int peer_group_remote_as_delete (struct peer_group *);
+
+int peer_activate (struct peer *, afi_t, safi_t);
+int peer_deactivate (struct peer *, afi_t, safi_t);
+
+int peer_group_bind (struct bgp *, union sockunion *, struct peer_group *,
+		     afi_t, safi_t, as_t *);
+int peer_group_unbind (struct bgp *, struct peer *, struct peer_group *,
+		       afi_t, safi_t);
+
+int peer_flag_set (struct peer *, u_int32_t);
+int peer_flag_unset (struct peer *, u_int32_t);
+
+int peer_af_flag_set (struct peer *, afi_t, safi_t, u_int32_t);
+int peer_af_flag_unset (struct peer *, afi_t, safi_t, u_int32_t);
+int peer_af_flag_check (struct peer *, afi_t, safi_t, u_int32_t);
+
+int peer_ebgp_multihop_set (struct peer *, int);
+int peer_ebgp_multihop_unset (struct peer *);
+
+int peer_description_set (struct peer *, char *);
+int peer_description_unset (struct peer *);
+
+int peer_update_source_if_set (struct peer *, char *);
+int peer_update_source_addr_set (struct peer *, union sockunion *);
+int peer_update_source_unset (struct peer *);
+
+int peer_default_originate_set (struct peer *, afi_t, safi_t, char *);
+int peer_default_originate_unset (struct peer *, afi_t, safi_t);
+
+int peer_port_set (struct peer *, u_int16_t);
+int peer_port_unset (struct peer *);
+
+int peer_weight_set (struct peer *, u_int16_t);
+int peer_weight_unset (struct peer *);
+
+int peer_timers_set (struct peer *, u_int32_t, u_int32_t);
+int peer_timers_unset (struct peer *);
+
+int peer_timers_connect_set (struct peer *, u_int32_t);
+int peer_timers_connect_unset (struct peer *);
+
+int peer_advertise_interval_set (struct peer *, u_int32_t);
+int peer_advertise_interval_unset (struct peer *);
+
+int peer_version_set (struct peer *, int);
+int peer_version_unset (struct peer *);
+
+int peer_interface_set (struct peer *, char *);
+int peer_interface_unset (struct peer *);
+
+int peer_distribute_set (struct peer *, afi_t, safi_t, int, char *);
+int peer_distribute_unset (struct peer *, afi_t, safi_t, int);
+
+int peer_allowas_in_set (struct peer *, afi_t, safi_t, int);
+int peer_allowas_in_unset (struct peer *, afi_t, safi_t);
+
+int peer_local_as_set (struct peer *, as_t, int);
+int peer_local_as_unset (struct peer *);
+
+int peer_prefix_list_set (struct peer *, afi_t, safi_t, int, char *);
+int peer_prefix_list_unset (struct peer *, afi_t, safi_t, int);
+
+int peer_aslist_set (struct peer *, afi_t, safi_t, int, char *);
+int peer_aslist_unset (struct peer *,afi_t, safi_t, int);
+
+int peer_route_map_set (struct peer *, afi_t, safi_t, int, char *);
+int peer_route_map_unset (struct peer *, afi_t, safi_t, int);
+
+int peer_unsuppress_map_set (struct peer *, afi_t, safi_t, char *);
+int peer_unsuppress_map_unset (struct peer *, afi_t, safi_t);
+
+int peer_maximum_prefix_set (struct peer *, afi_t, safi_t, u_int32_t, int);
+int peer_maximum_prefix_unset (struct peer *, afi_t, safi_t);
+
+int peer_clear (struct peer *);
+int peer_clear_soft (struct peer *, afi_t, safi_t, enum bgp_clear_type);