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/*
* Ouroboros - Copyright (C) 2016 - 2017
*
* PDU Forwarding Function
*
* Dimitri Staessens <dimitri.staessens@ugent.be>
* Sander Vrijders <sander.vrijders@ugent.be>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program 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; if not, write to the Free Software
* Foundation, Inc., http://www.fsf.org/about/contact/.
*/
#define OUROBOROS_PREFIX "pff"
#include <ouroboros/config.h>
#include <ouroboros/logs.h>
#include <ouroboros/hashtable.h>
#include <ouroboros/errno.h>
#include <assert.h>
#include <pthread.h>
#include "pff.h"
struct pff {
struct htable * table;
pthread_rwlock_t lock;
};
struct pff * pff_create(void)
{
struct pff * tmp;
tmp = malloc(sizeof(*tmp));
if (tmp == NULL)
return NULL;
if (pthread_rwlock_init(&tmp->lock, NULL)) {
free(tmp);
return NULL;
}
tmp->table = htable_create(PFT_SIZE, false);
if (tmp->table == NULL) {
pthread_rwlock_destroy(&tmp->lock);
free(tmp);
return NULL;
}
return tmp;
}
void pff_destroy(struct pff * instance)
{
assert(instance);
htable_destroy(instance->table);
pthread_rwlock_destroy(&instance->lock);
free(instance);
}
void pff_lock(struct pff * instance)
{
pthread_rwlock_wrlock(&instance->lock);
}
void pff_unlock(struct pff * instance)
{
pthread_rwlock_unlock(&instance->lock);
}
int pff_add(struct pff * instance,
uint64_t addr,
int fd)
{
int * val;
assert(instance);
val = malloc(sizeof(*val));
if (val == NULL)
return -ENOMEM;
*val = fd;
if (htable_insert(instance->table, addr, val)) {
free(val);
return -1;
}
return 0;
}
int pff_update(struct pff * instance,
uint64_t addr,
int fd)
{
int * val;
assert(instance);
val = malloc(sizeof(*val));
if (val == NULL)
return -ENOMEM;
*val = fd;
if (htable_delete(instance->table, addr)) {
free(val);
return -1;
}
if (htable_insert(instance->table, addr, val)) {
free(val);
return -1;
}
return 0;
}
int pff_remove(struct pff * instance,
uint64_t addr)
{
assert(instance);
if (htable_delete(instance->table, addr))
return -1;
return 0;
}
void pff_flush(struct pff * instance)
{
assert(instance);
htable_flush(instance->table);
}
int pff_nhop(struct pff * instance,
uint64_t addr)
{
int * j;
int fd = -1;
assert(instance);
pthread_rwlock_rdlock(&instance->lock);
j = (int *) htable_lookup(instance->table, addr);
if (j != NULL)
fd = *j;
pthread_rwlock_unlock(&instance->lock);
return fd;
}
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