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NextHop Tracking (NHT) is a significant function introduced into Quagga by Cumulus. Initially intended for tracking BGP nexthops, this has been extended subsequently to also cater to nexthops for static routes, BGP peer reachability tracking and BGP route tracking for routes to be imported into BGP. This patch reorganizes the code a bit to make it easier to follow and maintain. No functional changes introduced. Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com> Reviewed-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Dinesh Dutt <ddutt@cumulusnetworks.com> Ticket: CM-5599 Reviewed By: CCR-3906 Testing Done: Manual and bgpsmoke
75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
/*
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* Zebra next hop tracking header
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* Copyright (C) 2013 Cumulus Networks, Inc.
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*
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* This file is part of GNU Zebra.
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*
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* GNU Zebra is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* GNU Zebra is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Zebra; see the file COPYING. If not, write to the Free
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* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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#ifndef _ZEBRA_RNH_H
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#define _ZEBRA_RNH_H
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#include "prefix.h"
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#include "vty.h"
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/* Nexthop structure. */
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struct rnh
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{
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u_char flags;
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#define ZEBRA_NHT_CONNECTED 0x1
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#define ZEBRA_NHT_DELETED 0x2
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#define ZEBRA_NHT_EXACT_MATCH 0x4
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struct rib *state;
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struct prefix resolved_route;
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struct list *client_list;
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struct list *zebra_static_route_list; /* static routes dependent on this NH */
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struct route_node *node;
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int filtered[ZEBRA_ROUTE_MAX]; /* if this has been filtered for client */
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};
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typedef enum
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{
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RNH_NEXTHOP_TYPE,
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RNH_IMPORT_CHECK_TYPE
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} rnh_type_t;
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extern int zebra_rnh_ip_default_route;
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extern int zebra_rnh_ipv6_default_route;
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extern struct rnh *zebra_add_rnh(struct prefix *p, vrf_id_t vrfid,
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rnh_type_t type);
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extern struct rnh *zebra_lookup_rnh(struct prefix *p, vrf_id_t vrfid,
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rnh_type_t type);
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extern void zebra_delete_rnh(struct rnh *rnh, rnh_type_t type);
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extern void zebra_add_rnh_client(struct rnh *rnh, struct zserv *client, rnh_type_t type,
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vrf_id_t vrfid);
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extern void zebra_register_rnh_static_nh(struct prefix *, struct route_node *);
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extern void zebra_deregister_rnh_static_nexthops (struct nexthop *nexthop, struct route_node *rn);
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extern void zebra_deregister_rnh_static_nh(struct prefix *, struct route_node *);
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extern void zebra_remove_rnh_client(struct rnh *rnh, struct zserv *client,
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rnh_type_t type);
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extern void zebra_evaluate_rnh(vrf_id_t vrfid, int family, int force, rnh_type_t type,
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struct prefix *p);
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extern int zebra_dispatch_rnh_table(vrf_id_t vrfid, int family, struct zserv *cl, rnh_type_t);
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extern void zebra_print_rnh_table(vrf_id_t vrfid, int family, struct vty *vty, rnh_type_t);
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extern char *rnh_str(struct rnh *rnh, char *buf, int size);
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extern int zebra_cleanup_rnh_client(vrf_id_t vrf, int family, struct zserv *client,
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rnh_type_t type);
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#endif /*_ZEBRA_RNH_H */
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