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1b1fe1c409
Add a hash function to turn a nexthop group into a 32 bit unsigned hash key with jhash. We do not care to hash any recursively resolved nexthops, just the group. Signed-off-by: Stephen Worley <sworley@cumulusnetworks.com>
125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
/*
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* Nexthop Group structure definition.
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* Copyright (C) 2018 Cumulus Networks, Inc.
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* Donald Sharp
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*
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* This program 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 Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; see the file COPYING; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __NEXTHOP_GROUP__
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#define __NEXTHOP_GROUP__
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#include <vty.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* What is a nexthop group?
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*
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* A nexthop group is a collection of nexthops that make up
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* the ECMP path for the route.
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*
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* This module provides a proper abstraction to this idea.
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*/
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struct nexthop_group {
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struct nexthop *nexthop;
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};
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struct nexthop_group *nexthop_group_new(void);
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void nexthop_group_delete(struct nexthop_group **nhg);
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void nexthop_add(struct nexthop **target, struct nexthop *nexthop);
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void nexthop_del(struct nexthop_group *nhg, struct nexthop *nexthop);
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void copy_nexthops(struct nexthop **tnh, const struct nexthop *nh,
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struct nexthop *rparent);
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uint32_t nexthop_group_hash(const struct nexthop_group *nhg);
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/* The following for loop allows to iterate over the nexthop
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* structure of routes.
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*
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* head: The pointer to the first nexthop in the chain.
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*
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* nexthop: The pointer to the current nexthop, either in the
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* top-level chain or in a resolved chain.
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*/
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#define ALL_NEXTHOPS(head, nhop) \
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(nhop) = (head.nexthop); \
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(nhop); \
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(nhop) = nexthop_next(nhop)
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#define ALL_NEXTHOPS_PTR(head, nhop) \
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(nhop) = ((head)->nexthop); \
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(nhop); \
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(nhop) = nexthop_next(nhop)
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struct nexthop_hold {
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char *nhvrf_name;
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union sockunion *addr;
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char *intf;
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};
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struct nexthop_group_cmd {
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RB_ENTRY(nexthop_group_cmd) nhgc_entry;
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char name[80];
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struct nexthop_group nhg;
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struct list *nhg_list;
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QOBJ_FIELDS
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};
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RB_HEAD(nhgc_entry_head, nexthp_group_cmd);
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RB_PROTOTYPE(nhgc_entry_head, nexthop_group_cmd, nhgc_entry,
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nexthop_group_cmd_compare)
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DECLARE_QOBJ_TYPE(nexthop_group_cmd)
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/*
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* Initialize nexthop_groups. If you are interested in when
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* a nexthop_group is added/deleted/modified, then set the
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* appropriate callback functions to handle it in your
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* code
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*/
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void nexthop_group_init(
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void (*create)(const char *name),
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void (*add_nexthop)(const struct nexthop_group_cmd *nhgc,
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const struct nexthop *nhop),
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void (*del_nexthop)(const struct nexthop_group_cmd *nhgc,
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const struct nexthop *nhop),
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void (*destroy)(const char *name));
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void nexthop_group_enable_vrf(struct vrf *vrf);
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void nexthop_group_disable_vrf(struct vrf *vrf);
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void nexthop_group_interface_state_change(struct interface *ifp,
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ifindex_t oldifindex);
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extern struct nexthop *nexthop_exists(struct nexthop_group *nhg,
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struct nexthop *nh);
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extern struct nexthop_group_cmd *nhgc_find(const char *name);
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extern void nexthop_group_write_nexthop(struct vty *vty, struct nexthop *nh);
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#ifdef __cplusplus
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}
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#endif
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#endif
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