bgpd.h

linux 路由软件 可支持RIP OSPF BGP等

  /* Capability flags (reset in bgp_stop) */
  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 */
#define PEER_CAP_RESTART_AF_RCV		    (1 << 6) /* graceful restart afi/safi received */
#define PEER_CAP_RESTART_AF_PRESERVE_RCV    (1 << 7) /* graceful restart afi/safi F-bit received */

  /* Global configuration flags. */
  u_int32_t flags;
#define PEER_FLAG_CONNECT_MODE_PASSIVE      (1 << 0) /* tranport connection-mode passive */
#define PEER_FLAG_CONNECT_MODE_ACTIVE       (1 << 1) /* tranport connection-mode active */
#define PEER_FLAG_SHUTDOWN                  (1 << 2) /* shutdown */
#define PEER_FLAG_DONT_CAPABILITY           (1 << 3) /* dont-capability */
#define PEER_FLAG_OVERRIDE_CAPABILITY       (1 << 4) /* override-capability */
#define PEER_FLAG_STRICT_CAP_MATCH          (1 << 5) /* strict-match */
#define PEER_FLAG_DYNAMIC_CAPABILITY        (1 << 6) /* dynamic capability */
#define PEER_FLAG_DISABLE_CONNECTED_CHECK   (1 << 7) /* disable-connected-check */
#define PEER_FLAG_LOCAL_AS_NO_PREPEND       (1 << 8) /* local-as no-prepend */
#define PEER_FLAG_PASSWORD                  (1 << 9) /* password */

  /* NSF mode (graceful restart) */
  u_char nsf[AFI_MAX][SAFI_MAX];

  /* 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 */

  /* address family configuration */
  u_int32_t af_config[AFI_MAX][SAFI_MAX];
#define PEER_AF_CONFIG_WEIGHT               (1 << 0) /* Default weight. */
  u_int16_t weight[AFI_MAX][SAFI_MAX];

  /* password for TCP signature */
  char *password;

  /* 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 */
#define PEER_STATUS_CREATE_INIT       (1 << 5) /* peer create init */
#define PEER_STATUS_NSF_MODE          (1 << 6) /* NSF aware peer */
#define PEER_STATUS_NSF_WAIT          (1 << 7) /* wait comeback peer */

  /* Peer status af flags (reset in bgp_stop) */
  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 */
#define PEER_STATUS_PREFIX_THRESHOLD  (1 << 3) /* exceed prefix-threshold */
#define PEER_STATUS_PREFIX_LIMIT      (1 << 4) /* exceed prefix-limit */
#define PEER_STATUS_EOR_SEND          (1 << 5) /* end-of-rib send to peer */
#define PEER_STATUS_EOR_RECEIVED      (1 << 6) /* end-of-rib received from peer */

  /* Default attribute value for the peer. */
  u_int32_t config;
#define PEER_CONFIG_TIMER             (1 << 1) /* keepalive & holdtime */
#define PEER_CONFIG_ROUTEADV          (1 << 2) /* route advertise */
  u_int32_t holdtime;
  u_int32_t keepalive;
  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;
  u_int32_t v_pmax_restart;
  u_int32_t v_active_delay;
  u_int32_t v_gr_restart;

  /* 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[AFI_MAX][SAFI_MAX];
  struct thread *t_pmax_restart;
  struct thread *t_gr_restart;
  struct thread *t_gr_stale;

  /* 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[AFI_MAX][SAFI_MAX];

  /* 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];
  u_char pmax_threshold[AFI_MAX][SAFI_MAX];
  u_int16_t pmax_restart[AFI_MAX][SAFI_MAX];
#define MAXIMUM_PREFIX_THRESHOLD_DEFAULT 75

  /* allowas-in. */
  char allowas_in[AFI_MAX][SAFI_MAX];

  /* peer reset cause */
  char last_reset;
#define PEER_DOWN_RID_CHANGE             1 /* bgp router-id command */
#define PEER_DOWN_REMOTE_AS_CHANGE       2 /* neighbor remote-as command */
#define PEER_DOWN_LOCAL_AS_CHANGE        3 /* neighbor local-as command */
#define PEER_DOWN_CLID_CHANGE            4 /* bgp cluster-id command */
#define PEER_DOWN_CONFED_ID_CHANGE       5 /* bgp confederation identifier command */
#define PEER_DOWN_CONFED_PEER_CHANGE     6 /* bgp confederation peer command */
#define PEER_DOWN_RR_CLIENT_CHANGE       7 /* neighbor route-reflector-client command */
#define PEER_DOWN_RS_CLIENT_CHANGE       8 /* neighbor route-server-client command */
#define PEER_DOWN_UPDATE_SOURCE_CHANGE   9 /* neighbor update-source command */
#define PEER_DOWN_AF_ACTIVATE           10 /* neighbor activate command */
#define PEER_DOWN_USER_SHUTDOWN         11 /* neighbor shutdown command */
#define PEER_DOWN_USER_RESET            12 /* clear ip bgp command */
#define PEER_DOWN_NOTIFY_RECEIVED       13 /* notification received */
#define PEER_DOWN_NOTIFY_SEND           14 /* notification send */
#define PEER_DOWN_CLOSE_SESSION         15 /* tcp session close */
#define PEER_DOWN_NEIGHBOR_DELETE       16 /* neghbor delete */
#define PEER_DOWN_RMAP_BIND             17 /* neghbor peer-group command */
#define PEER_DOWN_RMAP_UNBIND           18 /* no neighbor peer-group command */
#define PEER_DOWN_CAPABILITY_CHANGE     19 /* neighbor capability command */
#define PEER_DOWN_MULTIHOP_CHANGE       20 /* neighbor multihop command */
#define PEER_DOWN_PASSWORD_CHANGE       21 /* neighbor password command */
#define PEER_DOWN_NSF_CLOSE_SESSION     22 /* NSF tcp session close */

  /* The kind of route-map Flags.*/
  u_char rmap_type;
#define PEER_RMAP_TYPE_IN             (1 << 0) /* neighbor route-map in */
#define PEER_RMAP_TYPE_OUT            (1 << 1) /* neighbor route-map out */
#define PEER_RMAP_TYPE_NETWORK        (1 << 2) /* network route-map */
#define PEER_RMAP_TYPE_REDISTRIBUTE   (1 << 3) /* redistribute route-map */
#define PEER_RMAP_TYPE_DEFAULT        (1 << 4) /* default-originate route-map */
#define PEER_RMAP_TYPE_NOSET          (1 << 5) /* not allow to set commands */

#ifdef HAVE_OPENBSD_TCP_SIGNATURE
  u_int32_t spi_in;
  u_int32_t spi_out;
#endif /* HAVE_OPENBSD_TCP_SIGNATURE */
};

/* 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

/* 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
#define BGP_ATTR_NEW_ASPATH                     17
#define BGP_ATTR_NEW_AGGREGATOR                 18

/* 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