/* * Ouroboros - Copyright (C) 2016 * * 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 as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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/errno.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 <float.h> void shutdown_client(int signo, siginfo_t * 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}; struct oping_msg * msg; char buf[OPING_BUF_SIZE]; int fd = 0; int msg_len = 0; float ms = 0; float d = 0; msg = (struct oping_msg *) buf; /* FIXME: use flow timeout option once we have it */ while(client.rcvd != client.count && (fd = flow_select(&timeout)) != -ETIMEDOUT) { flow_cntl(fd, FLOW_F_SETFL, FLOW_O_NONBLOCK); while (!((msg_len = flow_read(fd, buf, OPING_BUF_SIZE)) < 0)) { if (msg_len < 0) continue; if (ntohl(msg->type) != ECHO_REPLY) { printf("Invalid message received (%d).\n", msg->type); continue; } if (ntohl(msg->id) >= client.count) { printf("Invalid id.\n"); continue; } ++client.rcvd; clock_gettime(CLOCK_REALTIME, &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 / (float) 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}; 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); while (client.sent < client.count) { nanosleep(&wait, NULL); msg->id = htonl(client.sent); if (flow_write(*fdp, buf, client.size) == -1) { printf("Failed to send SDU.\n"); flow_dealloc(*fdp); return (void *) -1; } clock_gettime(CLOCK_REALTIME, &now); pthread_mutex_lock(&client.lock); client.times[client.sent++] = now; pthread_mutex_unlock(&client.lock); } return (void *) 0; } int client_main() { struct sigaction sig_act; struct timespec tic; struct timespec toc; int 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; } 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; } pthread_mutex_init(&client.lock, NULL); pthread_mutex_lock(&client.lock); client.sent = 0; client.rcvd = 0; client.rtt_min = FLT_MAX; client.rtt_max = 0; client.rtt_avg = 0; client.rtt_m2 = 0; client.times = malloc(sizeof(struct timespec) * client.count); if (client.times == NULL) { pthread_mutex_unlock(&client.lock); return -ENOMEM; } pthread_mutex_unlock(&client.lock); clock_gettime(CLOCK_REALTIME, &tic); pthread_create(&client.reader_pt, NULL, reader, NULL); 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 SDU's transmitted, ", client.sent); printf("%d received, ", client.rcvd); printf("%d%% packet loss, ", client.sent == 0 ? 0 : 100 - ((100 * client.rcvd) / 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 / (float) (client.rcvd - 1))); else printf("NaN ms\n"); } pthread_mutex_lock(&client.lock); free(client.times); pthread_mutex_unlock(&client.lock); pthread_mutex_destroy(&client.lock); flow_dealloc(fd); return 0; }