/* * Ouroboros - Copyright (C) 2016 - 2018 * * Ouroboros ping application * * 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. */ 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; fccntl(fd, FLOWSRCVTIMEO, &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) { free(buf); 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; } 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; }