/* * Ouroboros - Copyright (C) 2016 - 2020 * * 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; }