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/*
* Ouroboros - Copyright (C) 2016 - 2020
*
* Congestion Avoidance
*
* 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 "ca"
#include <ouroboros/logs.h>
#include "ca.h"
#include "pol-ca-ops.h"
#include "pol/ca-mb-ecn.h"
#include "pol/ca-nop.h"
struct {
struct pol_ca_ops * ops;
} ca;
int ca_init(enum pol_cong_avoid pol)
{
switch(pol) {
case CA_NONE:
log_dbg("Disabling congestion control.");
ca.ops = &nop_ca_ops;
break;
case CA_MB_ECN:
log_dbg("Using multi-bit ECN.");
ca.ops = &mb_ecn_ca_ops;
break;
default:
return -1;
}
return 0;
}
void ca_fini(void)
{
ca.ops = NULL;
}
void * ca_ctx_create(void)
{
return ca.ops->ctx_create();
}
void ca_ctx_destroy(void * ctx)
{
return ca.ops->ctx_destroy(ctx);
}
ca_wnd_t ca_ctx_update_snd(void * ctx,
size_t len)
{
return ca.ops->ctx_update_snd(ctx, len);
}
bool ca_ctx_update_rcv(void * ctx,
size_t len,
uint8_t ecn,
uint16_t * ece)
{
return ca.ops->ctx_update_rcv(ctx, len, ecn, ece);
}
void ca_ctx_update_ece(void * ctx,
uint16_t ece)
{
return ca.ops->ctx_update_ece(ctx, ece);
}
void ca_wnd_wait(ca_wnd_t wnd)
{
return ca.ops->wnd_wait(wnd);
}
uint8_t ca_calc_ecn(int fd,
size_t len)
{
return ca.ops->calc_ecn(fd, len);
}
ssize_t ca_print_stats(void * ctx,
char * buf,
size_t len)
{
if (ca.ops->print_stats == NULL)
return 0;
return ca.ops->print_stats(ctx, buf, len);
}
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