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/*
* Ouroboros - Copyright (C) 2016 - 2020
*
* Simple 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 _POSIX_C_SOURCE 200112L
#include "config.h"
#include <ouroboros/errno.h>
#include <assert.h>
#include <pthread.h>
#include "hashtable.h"
#include "simple_pff.h"
struct pff_i {
struct htable * table;
pthread_rwlock_t lock;
};
struct pol_pff_ops simple_pff_ops = {
.create = simple_pff_create,
.destroy = simple_pff_destroy,
.lock = simple_pff_lock,
.unlock = simple_pff_unlock,
.add = simple_pff_add,
.update = simple_pff_update,
.del = simple_pff_del,
.flush = simple_pff_flush,
.nhop = simple_pff_nhop,
.flow_state_change = NULL
};
struct pff_i * simple_pff_create(void)
{
struct pff_i * 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 simple_pff_destroy(struct pff_i * pff_i)
{
assert(pff_i);
htable_destroy(pff_i->table);
pthread_rwlock_destroy(&pff_i->lock);
free(pff_i);
}
void simple_pff_lock(struct pff_i * pff_i)
{
pthread_rwlock_wrlock(&pff_i->lock);
}
void simple_pff_unlock(struct pff_i * pff_i)
{
pthread_rwlock_unlock(&pff_i->lock);
}
int simple_pff_add(struct pff_i * pff_i,
uint64_t addr,
int * fd,
size_t len)
{
int * val;
assert(pff_i);
assert(len > 0);
(void) len;
val = malloc(sizeof(*val));
if (val == NULL)
return -ENOMEM;
*val = fd[0];
if (htable_insert(pff_i->table, addr, val, 1)) {
free(val);
return -1;
}
return 0;
}
int simple_pff_update(struct pff_i * pff_i,
uint64_t addr,
int * fd,
size_t len)
{
int * val;
assert(pff_i);
assert(len > 0);
(void) len;
val = malloc(sizeof(*val));
if (val == NULL)
return -ENOMEM;
*val = fd[0];
if (htable_delete(pff_i->table, addr)) {
free(val);
return -1;
}
if (htable_insert(pff_i->table, addr, val, 1)) {
free(val);
return -1;
}
return 0;
}
int simple_pff_del(struct pff_i * pff_i,
uint64_t addr)
{
assert(pff_i);
if (htable_delete(pff_i->table, addr))
return -1;
return 0;
}
void simple_pff_flush(struct pff_i * pff_i)
{
assert(pff_i);
htable_flush(pff_i->table);
}
int simple_pff_nhop(struct pff_i * pff_i,
uint64_t addr)
{
void * j;
size_t len;
int fd = -1;
assert(pff_i);
pthread_rwlock_rdlock(&pff_i->lock);
if (!htable_lookup(pff_i->table, addr, &j, &len))
fd = *((int *) j);
pthread_rwlock_unlock(&pff_i->lock);
return fd;
}
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