Annotation of embedaddon/quagga/bgpd/bgp_route.h, revision 1.1
1.1 ! misho 1: /* BGP routing information base
! 2: Copyright (C) 1996, 97, 98, 2000 Kunihiro Ishiguro
! 3:
! 4: This file is part of GNU Zebra.
! 5:
! 6: GNU Zebra is free software; you can redistribute it and/or modify it
! 7: under the terms of the GNU General Public License as published by the
! 8: Free Software Foundation; either version 2, or (at your option) any
! 9: later version.
! 10:
! 11: GNU Zebra is distributed in the hope that it will be useful, but
! 12: WITHOUT ANY WARRANTY; without even the implied warranty of
! 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
! 14: General Public License for more details.
! 15:
! 16: You should have received a copy of the GNU General Public License
! 17: along with GNU Zebra; see the file COPYING. If not, write to the Free
! 18: Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
! 19: 02111-1307, USA. */
! 20:
! 21: #ifndef _QUAGGA_BGP_ROUTE_H
! 22: #define _QUAGGA_BGP_ROUTE_H
! 23:
! 24: #include "bgp_table.h"
! 25:
! 26: /* Ancillary information to struct bgp_info,
! 27: * used for uncommonly used data (aggregation, MPLS, etc.)
! 28: * and lazily allocated to save memory.
! 29: */
! 30: struct bgp_info_extra
! 31: {
! 32: /* Pointer to dampening structure. */
! 33: struct bgp_damp_info *damp_info;
! 34:
! 35: /* This route is suppressed with aggregation. */
! 36: int suppress;
! 37:
! 38: /* Nexthop reachability check. */
! 39: u_int32_t igpmetric;
! 40:
! 41: /* MPLS label. */
! 42: u_char tag[3];
! 43: };
! 44:
! 45: struct bgp_info
! 46: {
! 47: /* For linked list. */
! 48: struct bgp_info *next;
! 49: struct bgp_info *prev;
! 50:
! 51: /* Peer structure. */
! 52: struct peer *peer;
! 53:
! 54: /* Attribute structure. */
! 55: struct attr *attr;
! 56:
! 57: /* Extra information */
! 58: struct bgp_info_extra *extra;
! 59:
! 60: /* Uptime. */
! 61: time_t uptime;
! 62:
! 63: /* reference count */
! 64: int lock;
! 65:
! 66: /* BGP information status. */
! 67: u_int16_t flags;
! 68: #define BGP_INFO_IGP_CHANGED (1 << 0)
! 69: #define BGP_INFO_DAMPED (1 << 1)
! 70: #define BGP_INFO_HISTORY (1 << 2)
! 71: #define BGP_INFO_SELECTED (1 << 3)
! 72: #define BGP_INFO_VALID (1 << 4)
! 73: #define BGP_INFO_ATTR_CHANGED (1 << 5)
! 74: #define BGP_INFO_DMED_CHECK (1 << 6)
! 75: #define BGP_INFO_DMED_SELECTED (1 << 7)
! 76: #define BGP_INFO_STALE (1 << 8)
! 77: #define BGP_INFO_REMOVED (1 << 9)
! 78: #define BGP_INFO_COUNTED (1 << 10)
! 79:
! 80: /* BGP route type. This can be static, RIP, OSPF, BGP etc. */
! 81: u_char type;
! 82:
! 83: /* When above type is BGP. This sub type specify BGP sub type
! 84: information. */
! 85: u_char sub_type;
! 86: #define BGP_ROUTE_NORMAL 0
! 87: #define BGP_ROUTE_STATIC 1
! 88: #define BGP_ROUTE_AGGREGATE 2
! 89: #define BGP_ROUTE_REDISTRIBUTE 3
! 90: };
! 91:
! 92: /* BGP static route configuration. */
! 93: struct bgp_static
! 94: {
! 95: /* Backdoor configuration. */
! 96: int backdoor;
! 97:
! 98: /* Import check status. */
! 99: u_char valid;
! 100:
! 101: /* IGP metric. */
! 102: u_int32_t igpmetric;
! 103:
! 104: /* IGP nexthop. */
! 105: struct in_addr igpnexthop;
! 106:
! 107: /* Atomic set reference count (ie cause of pathlimit) */
! 108: u_int32_t atomic;
! 109:
! 110: /* BGP redistribute route-map. */
! 111: struct
! 112: {
! 113: char *name;
! 114: struct route_map *map;
! 115: } rmap;
! 116:
! 117: /* MPLS label. */
! 118: u_char tag[3];
! 119: };
! 120:
! 121: /* Flags which indicate a route is unuseable in some form */
! 122: #define BGP_INFO_UNUSEABLE \
! 123: (BGP_INFO_HISTORY|BGP_INFO_DAMPED|BGP_INFO_REMOVED)
! 124: /* Macro to check BGP information is alive or not. Sadly,
! 125: * not equivalent to just checking previous, because of the
! 126: * sense of the additional VALID flag.
! 127: */
! 128: #define BGP_INFO_HOLDDOWN(BI) \
! 129: (! CHECK_FLAG ((BI)->flags, BGP_INFO_VALID) \
! 130: || CHECK_FLAG ((BI)->flags, BGP_INFO_UNUSEABLE))
! 131:
! 132: #define DISTRIBUTE_IN_NAME(F) ((F)->dlist[FILTER_IN].name)
! 133: #define DISTRIBUTE_IN(F) ((F)->dlist[FILTER_IN].alist)
! 134: #define DISTRIBUTE_OUT_NAME(F) ((F)->dlist[FILTER_OUT].name)
! 135: #define DISTRIBUTE_OUT(F) ((F)->dlist[FILTER_OUT].alist)
! 136:
! 137: #define PREFIX_LIST_IN_NAME(F) ((F)->plist[FILTER_IN].name)
! 138: #define PREFIX_LIST_IN(F) ((F)->plist[FILTER_IN].plist)
! 139: #define PREFIX_LIST_OUT_NAME(F) ((F)->plist[FILTER_OUT].name)
! 140: #define PREFIX_LIST_OUT(F) ((F)->plist[FILTER_OUT].plist)
! 141:
! 142: #define FILTER_LIST_IN_NAME(F) ((F)->aslist[FILTER_IN].name)
! 143: #define FILTER_LIST_IN(F) ((F)->aslist[FILTER_IN].aslist)
! 144: #define FILTER_LIST_OUT_NAME(F) ((F)->aslist[FILTER_OUT].name)
! 145: #define FILTER_LIST_OUT(F) ((F)->aslist[FILTER_OUT].aslist)
! 146:
! 147: #define ROUTE_MAP_IN_NAME(F) ((F)->map[RMAP_IN].name)
! 148: #define ROUTE_MAP_IN(F) ((F)->map[RMAP_IN].map)
! 149: #define ROUTE_MAP_OUT_NAME(F) ((F)->map[RMAP_OUT].name)
! 150: #define ROUTE_MAP_OUT(F) ((F)->map[RMAP_OUT].map)
! 151:
! 152: #define ROUTE_MAP_IMPORT_NAME(F) ((F)->map[RMAP_IMPORT].name)
! 153: #define ROUTE_MAP_IMPORT(F) ((F)->map[RMAP_IMPORT].map)
! 154: #define ROUTE_MAP_EXPORT_NAME(F) ((F)->map[RMAP_EXPORT].name)
! 155: #define ROUTE_MAP_EXPORT(F) ((F)->map[RMAP_EXPORT].map)
! 156:
! 157: #define UNSUPPRESS_MAP_NAME(F) ((F)->usmap.name)
! 158: #define UNSUPPRESS_MAP(F) ((F)->usmap.map)
! 159:
! 160: enum bgp_clear_route_type
! 161: {
! 162: BGP_CLEAR_ROUTE_NORMAL,
! 163: BGP_CLEAR_ROUTE_MY_RSCLIENT
! 164: };
! 165:
! 166: /* Prototypes. */
! 167: extern void bgp_route_init (void);
! 168: extern void bgp_route_finish (void);
! 169: extern void bgp_cleanup_routes (void);
! 170: extern void bgp_announce_route (struct peer *, afi_t, safi_t);
! 171: extern void bgp_announce_route_all (struct peer *);
! 172: extern void bgp_default_originate (struct peer *, afi_t, safi_t, int);
! 173: extern void bgp_soft_reconfig_in (struct peer *, afi_t, safi_t);
! 174: extern void bgp_soft_reconfig_rsclient (struct peer *, afi_t, safi_t);
! 175: extern void bgp_check_local_routes_rsclient (struct peer *rsclient, afi_t afi, safi_t safi);
! 176: extern void bgp_clear_route (struct peer *, afi_t, safi_t,
! 177: enum bgp_clear_route_type);
! 178: extern void bgp_clear_route_all (struct peer *);
! 179: extern void bgp_clear_adj_in (struct peer *, afi_t, safi_t);
! 180: extern void bgp_clear_stale_route (struct peer *, afi_t, safi_t);
! 181:
! 182: extern struct bgp_info *bgp_info_lock (struct bgp_info *);
! 183: extern struct bgp_info *bgp_info_unlock (struct bgp_info *);
! 184: extern void bgp_info_add (struct bgp_node *rn, struct bgp_info *ri);
! 185: extern void bgp_info_delete (struct bgp_node *rn, struct bgp_info *ri);
! 186: extern struct bgp_info_extra *bgp_info_extra_get (struct bgp_info *);
! 187: extern void bgp_info_set_flag (struct bgp_node *, struct bgp_info *, u_int32_t);
! 188: extern void bgp_info_unset_flag (struct bgp_node *, struct bgp_info *, u_int32_t);
! 189:
! 190: extern int bgp_nlri_sanity_check (struct peer *, int, u_char *, bgp_size_t);
! 191: extern int bgp_nlri_parse (struct peer *, struct attr *, struct bgp_nlri *);
! 192:
! 193: extern int bgp_maximum_prefix_overflow (struct peer *, afi_t, safi_t, int);
! 194:
! 195: extern void bgp_redistribute_add (struct prefix *, struct in_addr *, u_int32_t, u_char);
! 196: extern void bgp_redistribute_delete (struct prefix *, u_char);
! 197: extern void bgp_redistribute_withdraw (struct bgp *, afi_t, int);
! 198:
! 199: extern void bgp_static_delete (struct bgp *);
! 200: extern void bgp_static_update (struct bgp *, struct prefix *, struct bgp_static *,
! 201: afi_t, safi_t);
! 202: extern void bgp_static_withdraw (struct bgp *, struct prefix *, afi_t, safi_t);
! 203:
! 204: extern int bgp_static_set_vpnv4 (struct vty *vty, const char *,
! 205: const char *, const char *);
! 206:
! 207: extern int bgp_static_unset_vpnv4 (struct vty *, const char *,
! 208: const char *, const char *);
! 209:
! 210: /* this is primarily for MPLS-VPN */
! 211: extern int bgp_update (struct peer *, struct prefix *, struct attr *,
! 212: afi_t, safi_t, int, int, struct prefix_rd *,
! 213: u_char *, int);
! 214: extern int bgp_withdraw (struct peer *, struct prefix *, struct attr *,
! 215: afi_t, safi_t, int, int, struct prefix_rd *, u_char *);
! 216:
! 217: /* for bgp_nexthop and bgp_damp */
! 218: extern void bgp_process (struct bgp *, struct bgp_node *, afi_t, safi_t);
! 219: extern int bgp_config_write_network (struct vty *, struct bgp *, afi_t, safi_t, int *);
! 220: extern int bgp_config_write_distance (struct vty *, struct bgp *);
! 221:
! 222: extern void bgp_aggregate_increment (struct bgp *, struct prefix *, struct bgp_info *,
! 223: afi_t, safi_t);
! 224: extern void bgp_aggregate_decrement (struct bgp *, struct prefix *, struct bgp_info *,
! 225: afi_t, safi_t);
! 226:
! 227: extern u_char bgp_distance_apply (struct prefix *, struct bgp_info *, struct bgp *);
! 228:
! 229: extern afi_t bgp_node_afi (struct vty *);
! 230: extern safi_t bgp_node_safi (struct vty *);
! 231:
! 232: extern void route_vty_out (struct vty *, struct prefix *, struct bgp_info *, int, safi_t);
! 233: extern void route_vty_out_tag (struct vty *, struct prefix *, struct bgp_info *, int, safi_t);
! 234: extern void route_vty_out_tmp (struct vty *, struct prefix *, struct attr *, safi_t);
! 235:
! 236: #endif /* _QUAGGA_BGP_ROUTE_H */
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