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/*
* Ouroboros - Copyright (C) 2016 - 2017
*
* Ouroboros ping application
*
* Dimitri Staessens <dimitri.staessens@intec.ugent.be>
* 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <ouroboros/dev.h>
#include <ouroboros/fcntl.h>
#include <ouroboros/time_utils.h>
#ifdef __FreeBSD__
#define __XSI_VISIBLE 500
#endif
#include <signal.h>
#include <stdlib.h>
#include <sys/time.h>
#include <arpa/inet.h>
#include <math.h>
#include <errno.h>
#include <float.h>
static void busy_wait_until(const struct timespec * deadline)
{
struct timespec now;
clock_gettime(CLOCK_REALTIME, &now);
while (now.tv_sec < deadline->tv_sec)
clock_gettime(CLOCK_REALTIME, &now);
while (now.tv_sec == deadline->tv_sec
&& now.tv_nsec < deadline->tv_nsec)
clock_gettime(CLOCK_REALTIME, &now);
pthread_testcancel();
}
void shutdown_client(int signo, siginfo_t * info, void * c)
{
(void) info;
(void) c;
switch(signo) {
case SIGINT:
case SIGTERM:
case SIGHUP:
pthread_cancel(client.reader_pt);
pthread_cancel(client.writer_pt);
default:
return;
}
}
void * reader(void * o)
{
struct timespec timeout = {2, 0};
char buf[OPERF_BUF_SIZE];
int fd = *((int *) o);
int msg_len = 0;
flow_set_timeout(fd, &timeout);
while ((msg_len = flow_read(fd, buf, OPERF_BUF_SIZE)) != -ETIMEDOUT) {
if (msg_len != client.size) {
printf("Invalid message on fd %d.\n", fd);
continue;
}
++client.rcvd;
}
return (void *) 0;
}
void * writer(void * o)
{
int * fdp = (int *) o;
long gap = client.size * 8.0 * (BILLION / (double) client.rate);
struct timespec now;
struct timespec start;
struct timespec intv = {(gap / BILLION), gap % BILLION};
struct timespec end = {0, 0};
char * buf = malloc(client.size);
if (buf == NULL)
return (void *) -ENOMEM;
if (fdp == NULL)
return (void *) -EINVAL;
memset(buf, 0, client.size);
if (client.flood)
printf("Flooding %s with %d byte SDUs for %d seconds.\n\n",
client.s_apn, client.size, client.duration / 1000);
else
printf("Sending %d byte SDUs for %d s to %s at %.3lf Mb/s.\n\n",
client.size, client.duration / 1000, client.s_apn,
client.rate / (double) MILLION);
clock_gettime(CLOCK_REALTIME, &start);
clock_gettime(CLOCK_REALTIME, &now);
pthread_cleanup_push((void (*) (void *)) free, buf);
if (client.flood) {
while (ts_diff_ms(&start, &now) < client.duration) {
if (flow_write(*fdp, buf, client.size) == -1) {
printf("Failed to send SDU.\n");
flow_dealloc(*fdp);
free(buf);
return (void *) -1;
}
++client.sent;
clock_gettime(CLOCK_REALTIME, &now);
}
} else {
while (ts_diff_ms(&start, &now) < client.duration) {
clock_gettime(CLOCK_REALTIME, &now);
ts_add(&now, &intv, &end);
if (flow_write(*fdp, buf, client.size) == -1) {
printf("Failed to send SDU.\n");
flow_dealloc(*fdp);
free(buf);
return (void *) -1;
}
++client.sent;
if (client.sleep)
nanosleep(&intv, NULL);
else
busy_wait_until(&end);
}
}
pthread_cleanup_pop(true);
printf("Test finished.\n");
return (void *) 0;
}
int client_main(void)
{
struct sigaction sig_act;
struct timespec tic;
struct timespec toc;
int fd;
memset(&sig_act, 0, sizeof sig_act);
sig_act.sa_sigaction = &shutdown_client;
sig_act.sa_flags = 0;
if (sigaction(SIGINT, &sig_act, NULL) ||
sigaction(SIGTERM, &sig_act, NULL) ||
sigaction(SIGHUP, &sig_act, NULL) ||
sigaction(SIGPIPE, &sig_act, NULL)) {
printf("Failed to install sighandler.\n");
return -1;
}
client.sent = 0;
client.rcvd = 0;
fd = flow_alloc(client.s_apn, NULL, NULL);
if (fd < 0) {
printf("Failed to allocate flow.\n");
return -1;
}
if (flow_alloc_res(fd)) {
printf("Flow allocation refused.\n");
flow_dealloc(fd);
return -1;
}
clock_gettime(CLOCK_REALTIME, &tic);
pthread_create(&client.reader_pt, NULL, reader, &fd);
pthread_create(&client.writer_pt, NULL, writer, &fd);
pthread_join(client.writer_pt, NULL);
clock_gettime(CLOCK_REALTIME, &toc);
pthread_join(client.reader_pt, NULL);
printf("\n");
printf("--- %s perf statistics ---\n", client.s_apn);
printf("%ld SDUs transmitted, ", client.sent);
printf("%ld received, ", client.rcvd);
printf("%ld%% packet loss, ", client.sent == 0 ? 0 :
100 - ((100 * client.rcvd) / client.sent));
printf("time: %.3f ms, ", ts_diff_us(&tic, &toc) / 1000.0);
printf("bandwidth: %.3lf Mb/s.\n",
(client.rcvd * client.size * 8)
/ (double) ts_diff_us(&tic, &toc));
flow_dealloc(fd);
return 0;
}
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