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/*
* Ouroboros - Copyright (C) 2016 - 2021
*
* A simple CBR generator
*
* Dimitri Staessens <dimitri.staessens@ugent.be>
* Sander Vrijders <sander.vrijders@ugent.be>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <ouroboros/dev.h>
#include <signal.h>
volatile bool stop;
static void shutdown_client(int signo, siginfo_t * info, void * c)
{
(void) info;
(void) c;
switch(signo) {
case SIGINT:
case SIGTERM:
case SIGHUP:
stop = true;
default:
return;
}
}
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);
}
int client_main(char * server,
int duration,
int size,
long rate,
bool flood,
bool sleep)
{
struct sigaction sig_act;
int fd = 0;
char buf[BUF_SIZE];
long seqnr = 0;
long gap = size * 8.0 * (BILLION / (double) rate);
struct timespec start;
struct timespec end;
struct timespec intv = {(gap / BILLION), gap % BILLION};
int ms;
stop = false;
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;
}
printf("Client started, duration %d, rate %lu b/s, size %d B.\n",
duration, rate, size);
fd = flow_alloc(server, NULL, NULL);
if (fd < 0) {
printf("Failed to allocate flow.\n");
return -1;
}
clock_gettime(CLOCK_REALTIME, &start);
if (!flood) {
while (!stop) {
clock_gettime(CLOCK_REALTIME, &end);
ts_add(&end, &intv, &end);
memcpy(buf, &seqnr, sizeof(seqnr));
if (flow_write(fd, buf, size) < 0) {
stop = true;
continue;
}
if (sleep)
nanosleep(&intv, NULL);
else
busy_wait_until(&end);
++seqnr;
if (ts_diff_us(&start, &end) / MILLION >= duration)
stop = true;
}
} else { /* flood */
while (!stop) {
clock_gettime(CLOCK_REALTIME, &end);
if (flow_write(fd, buf, size) < 0) {
stop = true;
continue;
}
++seqnr;
if (ts_diff_us(&start, &end) / MILLION
>= (long) duration)
stop = true;
}
}
clock_gettime(CLOCK_REALTIME, &end);
ms = ts_diff_ms(&start, &end);
printf("sent statistics: "
"%9ld packets, %12ld bytes in %9d ms, %4.4f Mb/s\n",
seqnr, seqnr * size, ms, (seqnr / (ms * 1000.0)) * size * 8.0);
flow_dealloc(fd);
return 0;
}
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