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/*
* Ouroboros - Copyright (C) 2016
*
* Flow manager of the IPC Process
*
* Sander Vrijders <sander.vrijders@intec.ugent.be>
*
* This program 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 of the License, or
* (at your option) any later version.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define OUROBOROS_PREFIX "flow-manager"
#include <ouroboros/config.h>
#include <ouroboros/logs.h>
#include <ouroboros/dev.h>
#include <ouroboros/list.h>
#include <stdlib.h>
#include <stdbool.h>
#include <pthread.h>
#include <string.h>
#include "fmgr.h"
#include "ribmgr.h"
#include "frct.h"
#include "ipcp.h"
extern struct ipcp * _ipcp;
struct n_1_flow {
int fd;
char * ae_name;
struct list_head next;
};
struct fmgr {
pthread_t listen_thread;
struct list_head n_1_flows;
pthread_mutex_t n_1_flows_lock;
} * fmgr = NULL;
static int add_n_1_fd(int fd,
char * ae_name)
{
struct n_1_flow * tmp;
if (ae_name == NULL)
return -1;
tmp = malloc(sizeof(*tmp));
if (tmp == NULL)
return -1;
tmp->fd = fd;
tmp->ae_name = ae_name;
pthread_mutex_lock(&fmgr->n_1_flows_lock);
list_add(&tmp->next, &fmgr->n_1_flows);
pthread_mutex_unlock(&fmgr->n_1_flows_lock);
return 0;
}
static void * fmgr_listen(void * o)
{
int fd;
char * ae_name;
bool bound = false;
while (true) {
pthread_mutex_lock(&_ipcp->state_lock);
while (!(_ipcp->state == IPCP_ENROLLED ||
_ipcp->state == IPCP_SHUTDOWN))
pthread_cond_wait(&_ipcp->state_cond,
&_ipcp->state_lock);
if (_ipcp->state == IPCP_SHUTDOWN) {
pthread_mutex_unlock(&_ipcp->state_lock);
return 0;
}
pthread_mutex_unlock(&_ipcp->state_lock);
if (!bound && api_bind(_ipcp->data->dif_name) < 0) {
LOG_ERR("Failed to bind the server instance.");
pthread_mutex_unlock(&_ipcp->state_lock);
return (void *) -1;
}
bound = true;
fd = flow_accept(&ae_name);
if (fd < 0) {
LOG_ERR("Failed to accept flow.");
continue;
}
if (!(strcmp(ae_name, MGMT_AE) == 0 ||
strcmp(ae_name, DT_AE) == 0)) {
if (flow_alloc_resp(fd, -1))
LOG_ERR("Failed to reply to flow allocation.");
flow_dealloc(fd);
continue;
}
if (flow_alloc_resp(fd, 0)) {
LOG_ERR("Failed to reply to flow allocation.");
flow_dealloc(fd);
continue;
}
LOG_DBG("Accepted new flow allocation request for AE %s.",
ae_name);
if (strcmp(ae_name, MGMT_AE) == 0) {
if (ribmgr_add_flow(fd)) {
LOG_ERR("Failed to hand fd to RIB.");
flow_dealloc(fd);
continue;
}
}
if (strcmp(ae_name, DT_AE) == 0) {
if (frct_dt_flow(fd)) {
LOG_ERR("Failed to hand fd to FRCT.");
flow_dealloc(fd);
continue;
}
}
if (add_n_1_fd(fd, ae_name)) {
LOG_ERR("Failed to add file descriptor to list.");
flow_dealloc(fd);
continue;
}
}
return (void *) 0;
}
int fmgr_init()
{
fmgr = malloc(sizeof(*fmgr));
if (fmgr == NULL)
return -1;
INIT_LIST_HEAD(&fmgr->n_1_flows);
pthread_mutex_init(&fmgr->n_1_flows_lock, NULL);
pthread_create(&fmgr->listen_thread,
NULL,
fmgr_listen,
NULL);
return 0;
}
int fmgr_fini()
{
struct list_head * pos = NULL;
pthread_cancel(fmgr->listen_thread);
pthread_join(fmgr->listen_thread,
NULL);
list_for_each(pos, &fmgr->n_1_flows) {
struct n_1_flow * e =
list_entry(pos, struct n_1_flow, next);
if (e->ae_name != NULL)
free(e->ae_name);
if (ribmgr_remove_flow(e->fd))
LOG_ERR("Failed to remove management flow.");
}
free(fmgr);
return 0;
}
int fmgr_mgmt_flow(char * dst_name)
{
int fd;
int result;
/* FIXME: Request retransmission. */
fd = flow_alloc(dst_name, MGMT_AE, NULL);
if (fd < 0) {
LOG_ERR("Failed to allocate flow to %s", dst_name);
return -1;
}
result = flow_alloc_res(fd);
if (result < 0) {
LOG_ERR("Result of flow allocation to %s is %d",
dst_name, result);
return -1;
}
if (ribmgr_add_flow(fd)) {
LOG_ERR("Failed to hand file descriptor to RIB manager");
flow_dealloc(fd);
return -1;
}
if (add_n_1_fd(fd, strdup(MGMT_AE))) {
LOG_ERR("Failed to add file descriptor to list.");
flow_dealloc(fd);
return -1;
}
return 0;
}
int fmgr_dt_flow(char * dst_name)
{
LOG_MISSING;
return -1;
}
int fmgr_flow_alloc(pid_t n_api,
int port_id,
char * dst_ap_name,
char * src_ae_name,
enum qos_cube qos)
{
LOG_MISSING;
return -1;
}
int fmgr_flow_alloc_resp(pid_t n_api,
int port_id,
int response)
{
LOG_MISSING;
return -1;
}
int fmgr_flow_dealloc(int port_id)
{
LOG_MISSING;
return -1;
}
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