/* * Ouroboros - Copyright (C) 2016 - 2017 * * Ouroboros ping application * * Dimitri Staessens <dimitri.staessens@ugent.be> * Sander Vrijders <sander.vrijders@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., http://www.fsf.org/about/contact/. */ #include <ouroboros/dev.h> #include <ouroboros/fcntl.h> #include <ouroboros/time_utils.h> #include <signal.h> #include <stdlib.h> #include <sys/time.h> #include <arpa/inet.h> #include <math.h> #include <errno.h> #include <float.h> 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}; struct timespec now = {0, 0}; char buf[OPING_BUF_SIZE]; struct oping_msg * msg = (struct oping_msg *) buf; int fd = *((int *) o); int msg_len = 0; double ms = 0; double d = 0; flow_set_timeout(fd, &timeout); while (client.rcvd != client.count) { msg_len = flow_read(fd, buf, OPING_BUF_SIZE); if (msg_len == -ETIMEDOUT) break; if (msg_len < 0) continue; if (ntohl(msg->type) != ECHO_REPLY) { printf("Invalid message on fd %d.\n", fd); continue; } if (ntohl(msg->id) >= client.count) { printf("Invalid id.\n"); continue; } ++client.rcvd; clock_gettime(CLOCK_MONOTONIC, &now); pthread_mutex_lock(&client.lock); ms = ts_diff_us(&client.times[ntohl(msg->id)], &now) / 1000.0; pthread_mutex_unlock(&client.lock); printf("%d bytes from %s: seq=%d time=%.3f ms\n", msg_len, client.s_apn, ntohl(msg->id), ms); if (ms < client.rtt_min) client.rtt_min = ms; if (ms > client.rtt_max) client.rtt_max = ms; d = (ms - client.rtt_avg); client.rtt_avg += d / client.rcvd; client.rtt_m2 += d * (ms - client.rtt_avg); } return (void *) 0; } void * writer(void * o) { int * fdp = (int *) o; struct timespec now; struct timespec wait = {client.interval / 1000, (client.interval % 1000) * MILLION}; struct oping_msg * msg; char * buf = malloc(client.size); if (buf == NULL) return (void *) -ENOMEM; if (fdp == NULL) return (void *) -EINVAL; memset(buf, 0, client.size); msg = (struct oping_msg *) buf; printf("Pinging %s with %d bytes of data:\n\n", client.s_apn, client.size); pthread_cleanup_push((void (*) (void *)) free, buf); while (client.sent < client.count) { nanosleep(&wait, NULL); msg->type = htonl(ECHO_REQUEST); msg->id = htonl(client.sent); clock_gettime(CLOCK_MONOTONIC, &now); pthread_mutex_lock(&client.lock); client.times[client.sent++] = now; pthread_mutex_unlock(&client.lock); if (flow_write(*fdp, buf, client.size) == -1) { printf("Failed to send SDU.\n"); flow_dealloc(*fdp); free(buf); return (void *) -1; } } pthread_cleanup_pop(true); return (void *) 0; } static int client_init(void) { client.times = malloc(sizeof(struct timespec) * client.count); if (client.times == NULL) { pthread_mutex_unlock(&client.lock); return -ENOMEM; } client.sent = 0; client.rcvd = 0; client.rtt_min = FLT_MAX; client.rtt_max = 0; client.rtt_avg = 0; client.rtt_m2 = 0; pthread_mutex_init(&client.lock, NULL); return 0; } void client_fini(void) { if (client.times != NULL) free(client.times); } 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; } if (client_init()) { printf("Failed to initialize client.\n"); return -1; } fd = flow_alloc(client.s_apn, NULL, NULL); if (fd < 0) { printf("Failed to allocate flow.\n"); client_fini(); 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); pthread_join(client.reader_pt, NULL); clock_gettime(CLOCK_REALTIME, &toc); printf("\n"); printf("--- %s ping statistics ---\n", client.s_apn); printf("%d SDUs transmitted, ", client.sent); printf("%d received, ", client.rcvd); printf("%.0lf%% packet loss, ", client.sent == 0 ? 0 : ceil(100 - (100 * (client.rcvd / (float) client.sent)))); printf("time: %.3f ms\n", ts_diff_us(&tic, &toc) / 1000.0); if (client.rcvd > 0) { printf("rtt min/avg/max/mdev = %.3f/%.3f/%.3f/", client.rtt_min, client.rtt_avg, client.rtt_max); if (client.rcvd > 1) printf("%.3f ms\n", sqrt(client.rtt_m2 / (client.rcvd - 1))); else printf("NaN ms\n"); } flow_dealloc(fd); client_fini(); return 0; }