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/*
* SHARP - code to track nexthops
* Copyright (C) Cumulus Networks, Inc.
* Donald Sharp
*
* This file is part of FRR.
*
* FRR 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.
*
* FRR 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 this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include "memory.h"
#include "nexthop.h"
#include "nexthop_group.h"
#include "vty.h"
#include "typesafe.h"
#include "zclient.h"
#include "sharp_nht.h"
#include "sharp_globals.h"
#include "sharp_zebra.h"
DEFINE_MTYPE_STATIC(SHARPD, NH_TRACKER, "Nexthop Tracker");
DEFINE_MTYPE_STATIC(SHARPD, NHG, "Nexthop Group");
struct sharp_nh_tracker *sharp_nh_tracker_get(struct prefix *p)
{
struct listnode *node;
struct sharp_nh_tracker *nht;
for (ALL_LIST_ELEMENTS_RO(sg.nhs, node, nht)) {
if (prefix_same(&nht->p, p))
break;
}
if (nht)
return nht;
nht = XCALLOC(MTYPE_NH_TRACKER, sizeof(*nht));
prefix_copy(&nht->p, p);
listnode_add(sg.nhs, nht);
return nht;
}
void sharp_nh_tracker_dump(struct vty *vty)
{
struct listnode *node;
struct sharp_nh_tracker *nht;
for (ALL_LIST_ELEMENTS_RO(sg.nhs, node, nht))
vty_out(vty, "%pFX: Nexthops: %u Updates: %u\n", &nht->p,
nht->nhop_num, nht->updates);
}
PREDECL_RBTREE_UNIQ(sharp_nhg_rb);
struct sharp_nhg {
struct sharp_nhg_rb_item mylistitem;
uint32_t id;
#define NHG_NAME_LEN 256
char name[NHG_NAME_LEN];
bool installed;
};
static uint32_t nhg_id;
static uint32_t sharp_get_next_nhid(void)
{
zlog_debug("NHG ID assigned: %u", nhg_id);
return nhg_id++;
}
struct sharp_nhg_rb_head nhg_head;
static int sharp_nhg_compare_func(const struct sharp_nhg *a,
const struct sharp_nhg *b)
{
return strncmp(a->name, b->name, NHG_NAME_LEN);
}
DECLARE_RBTREE_UNIQ(sharp_nhg_rb, struct sharp_nhg, mylistitem,
sharp_nhg_compare_func);
static struct sharp_nhg *sharp_nhgroup_find_id(uint32_t id)
{
struct sharp_nhg *lookup;
/* Yea its just a for loop, I don't want add complexity
* to sharpd with another RB tree for just IDs
*/
frr_each (sharp_nhg_rb, &nhg_head, lookup) {
if (lookup->id == id)
return lookup;
}
return NULL;
}
static void sharp_nhgroup_add_cb(const char *name)
{
struct sharp_nhg *snhg;
snhg = XCALLOC(MTYPE_NHG, sizeof(*snhg));
snhg->id = sharp_get_next_nhid();
strlcpy(snhg->name, name, sizeof(snhg->name));
sharp_nhg_rb_add(&nhg_head, snhg);
}
static void sharp_nhgroup_add_nexthop_cb(const struct nexthop_group_cmd *nhgc,
const struct nexthop *nhop)
{
struct sharp_nhg lookup;
struct sharp_nhg *snhg;
struct nexthop_group_cmd *bnhgc = NULL;
strlcpy(lookup.name, nhgc->name, sizeof(lookup.name));
snhg = sharp_nhg_rb_find(&nhg_head, &lookup);
if (nhgc->backup_list_name[0])
bnhgc = nhgc_find(nhgc->backup_list_name);
nhg_add(snhg->id, &nhgc->nhg, (bnhgc ? &bnhgc->nhg : NULL));
}
static void sharp_nhgroup_del_nexthop_cb(const struct nexthop_group_cmd *nhgc,
const struct nexthop *nhop)
{
struct sharp_nhg lookup;
struct sharp_nhg *snhg;
struct nexthop_group_cmd *bnhgc = NULL;
strlcpy(lookup.name, nhgc->name, sizeof(lookup.name));
snhg = sharp_nhg_rb_find(&nhg_head, &lookup);
if (nhgc->backup_list_name[0])
bnhgc = nhgc_find(nhgc->backup_list_name);
nhg_add(snhg->id, &nhgc->nhg, (bnhgc ? &bnhgc->nhg : NULL));
}
static void sharp_nhgroup_delete_cb(const char *name)
{
struct sharp_nhg lookup;
struct sharp_nhg *snhg;
strlcpy(lookup.name, name, sizeof(lookup.name));
snhg = sharp_nhg_rb_find(&nhg_head, &lookup);
if (!snhg)
return;
nhg_del(snhg->id);
sharp_nhg_rb_del(&nhg_head, snhg);
XFREE(MTYPE_NHG, snhg);
}
uint32_t sharp_nhgroup_get_id(const char *name)
{
struct sharp_nhg lookup;
struct sharp_nhg *snhg;
strlcpy(lookup.name, name, sizeof(lookup.name));
snhg = sharp_nhg_rb_find(&nhg_head, &lookup);
if (!snhg)
return 0;
return snhg->id;
}
void sharp_nhgroup_id_set_installed(uint32_t id, bool installed)
{
struct sharp_nhg *snhg;
snhg = sharp_nhgroup_find_id(id);
if (!snhg) {
zlog_debug("%s: nhg %u not found", __func__, id);
return;
}
snhg->installed = installed;
}
bool sharp_nhgroup_id_is_installed(uint32_t id)
{
struct sharp_nhg *snhg;
snhg = sharp_nhgroup_find_id(id);
if (!snhg) {
zlog_debug("%s: nhg %u not found", __func__, id);
return false;
}
return snhg->installed;
}
void sharp_nhgroup_init(void)
{
sharp_nhg_rb_init(&nhg_head);
nhg_id = zclient_get_nhg_start(ZEBRA_ROUTE_SHARP);
nexthop_group_init(sharp_nhgroup_add_cb, sharp_nhgroup_add_nexthop_cb,
sharp_nhgroup_del_nexthop_cb,
sharp_nhgroup_delete_cb);
}
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