1/*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (C) 2019 Jan Sucan <jansucan@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/types.h> 30#include <sys/socket.h> 31 32#include <arpa/inet.h> 33#include <netdb.h> 34#include <netinet/in.h> 35 36#include <err.h> 37#include <math.h> 38#include <signal.h> 39#include <stdbool.h> 40#include <stdio.h> 41#include <stdlib.h> 42#include <string.h> 43#include <sysexits.h> 44#include <unistd.h> 45 46#include "main.h" 47#ifdef INET 48#include "ping.h" 49#endif 50#ifdef INET6 51#include "ping6.h" 52#endif 53 54#if defined(INET) && defined(INET6) 55#define OPTSTR PING6OPTS PING4OPTS 56#elif defined(INET) 57#define OPTSTR PING4OPTS 58#elif defined(INET6) 59#define OPTSTR PING6OPTS 60#else 61#error At least one of INET and INET6 is required 62#endif 63 64/* various options */ 65u_int options; 66 67char *hostname; 68 69/* counters */ 70long nreceived; /* # of packets we got back */ 71long nrepeats; /* number of duplicates */ 72long ntransmitted; /* sequence # for outbound packets = #sent */ 73long nrcvtimeout = 0; /* # of packets we got back after waittime */ 74 75/* nonzero if we've been told to finish up */ 76volatile sig_atomic_t seenint; 77volatile sig_atomic_t seeninfo; 78 79/* timing */ 80int timing; /* flag to do timing */ 81double tmin = 999999999.0; /* minimum round trip time */ 82double tmax = 0.0; /* maximum round trip time */ 83double tsum = 0.0; /* sum of all times, for doing average */ 84double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 85 86int 87main(int argc, char *argv[]) 88{ 89#if defined(INET) 90 struct in_addr a; 91#endif 92#if defined(INET6) 93 struct in6_addr a6; 94#endif 95#if defined(INET) && defined(INET6) 96 struct addrinfo hints, *res, *ai; 97 const char *target; 98 int error; 99#endif 100 int opt; 101 102#ifdef INET6 103 if (strcmp(getprogname(), "ping6") == 0) 104 return ping6(argc, argv); 105#endif 106 107 while ((opt = getopt(argc, argv, ":" OPTSTR)) != -1) { 108 switch (opt) { 109#ifdef INET 110 case '4': 111 goto ping4; 112#endif 113#ifdef INET6 114 case '6': 115 goto ping6; 116#endif 117 case 'S': 118 /* 119 * If -S is given with a numeric parameter, 120 * force use of the corresponding version. 121 */ 122#ifdef INET 123 if (inet_pton(AF_INET, optarg, &a) == 1) 124 goto ping4; 125#endif 126#ifdef INET6 127 if (inet_pton(AF_INET6, optarg, &a6) == 1) 128 goto ping6; 129#endif 130 break; 131 default: 132 break; 133 } 134 } 135 136 /* 137 * For IPv4, only one positional argument, the target, is allowed. 138 * For IPv6, multiple positional argument are allowed; the last 139 * one is the target, and preceding ones are intermediate hops. 140 * This nuance is lost here, but the only case where it matters is 141 * an error. 142 */ 143 if (optind >= argc) 144 usage(); 145 146#if defined(INET) && defined(INET6) 147 target = argv[argc - 1]; 148 memset(&hints, 0, sizeof(hints)); 149 hints.ai_socktype = SOCK_RAW; 150 if (feature_present("inet") && !feature_present("inet6")) 151 hints.ai_family = AF_INET; 152 else if (feature_present("inet6") && !feature_present("inet")) 153 hints.ai_family = AF_INET6; 154 else 155 hints.ai_family = AF_UNSPEC; 156 error = getaddrinfo(target, NULL, &hints, &res); 157 if (res == NULL) 158 errx(EX_NOHOST, "cannot resolve %s: %s", 159 target, gai_strerror(error)); 160 for (ai = res; ai != NULL; ai = ai->ai_next) { 161 if (ai->ai_family == AF_INET) { 162 freeaddrinfo(res); 163 goto ping4; 164 } 165 if (ai->ai_family == AF_INET6) { 166 freeaddrinfo(res); 167 goto ping6; 168 } 169 } 170 freeaddrinfo(res); 171 errx(EX_NOHOST, "cannot resolve %s", target); 172#endif 173#ifdef INET 174ping4: 175 optreset = 1; 176 optind = 1; 177 return ping(argc, argv); 178#endif 179#ifdef INET6 180ping6: 181 optreset = 1; 182 optind = 1; 183 return ping6(argc, argv); 184#endif 185} 186 187/* 188 * onsignal -- 189 * Set the global bit that causes the main loop to quit. 190 */ 191void 192onsignal(int sig) 193{ 194 switch (sig) { 195 case SIGALRM: 196 case SIGINT: 197 /* 198 * When doing reverse DNS lookups, the seenint flag might not 199 * be noticed for a while. Just exit if we get a second SIGINT. 200 */ 201 if (!(options & F_HOSTNAME) && seenint != 0) 202 _exit(nreceived ? 0 : 2); 203 seenint++; 204 break; 205 case SIGINFO: 206 seeninfo++; 207 break; 208 } 209} 210 211/* 212 * pr_summary -- 213 * Print out summary statistics to the given output stream. 214 */ 215void 216pr_summary(FILE * restrict stream) 217{ 218 fprintf(stream, "\n--- %s ping statistics ---\n", hostname); 219 fprintf(stream, "%ld packets transmitted, ", ntransmitted); 220 fprintf(stream, "%ld packets received, ", nreceived); 221 if (nrepeats) 222 fprintf(stream, "+%ld duplicates, ", nrepeats); 223 if (ntransmitted) { 224 if (nreceived > ntransmitted) 225 fprintf(stream, "-- somebody's duplicating packets!"); 226 else 227 fprintf(stream, "%.1f%% packet loss", 228 ((((double)ntransmitted - nreceived) * 100.0) / 229 ntransmitted)); 230 } 231 if (nrcvtimeout) 232 fprintf(stream, ", %ld packets out of wait time", nrcvtimeout); 233 fputc('\n', stream); 234 if (nreceived && timing) { 235 /* Only display average to microseconds */ 236 double num = nreceived + nrepeats; 237 double avg = tsum / num; 238 double stddev = sqrt(fmax(0, tsumsq / num - avg * avg)); 239 fprintf(stream, 240 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", 241 tmin, avg, tmax, stddev); 242 } 243 fflush(stream); 244} 245 246void 247usage(void) 248{ 249 (void)fprintf(stderr, 250 "usage:\n" 251#ifdef INET 252 "\tping [-4AaDdfHnoQqRrv] [-C pcp] [-c count] " 253 "[-G sweepmaxsize]\n" 254 "\t [-g sweepminsize] [-h sweepincrsize] [-i wait] " 255 "[-l preload]\n" 256 "\t [-M mask | time] [-m ttl] " 257#ifdef IPSEC 258 "[-P policy] " 259#endif 260 "[-p pattern] [-S src_addr] \n" 261 "\t [-s packetsize] [-t timeout] [-W waittime] [-z tos] " 262 "IPv4-host\n" 263 "\tping [-4AaDdfHLnoQqRrv] [-C pcp] [-c count] [-I iface] " 264 "[-i wait]\n" 265 "\t [-l preload] [-M mask | time] [-m ttl] " 266#ifdef IPSEC 267 "[-P policy] " 268#endif 269 "[-p pattern]\n" 270 "\t [-S src_addr] [-s packetsize] [-T ttl] [-t timeout] [-W waittime]\n" 271 "\t [-z tos] IPv4-mcast-group\n" 272#endif /* INET */ 273#ifdef INET6 274 "\tping [-6AaDd" 275#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) 276 "E" 277#endif 278 "fHnNoOq" 279#ifdef IPV6_USE_MIN_MTU 280 "u" 281#endif 282 "vyY" 283#if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) 284 "Z" 285#endif 286 "] " 287 "[-b bufsiz] [-C pcp] [-c count] [-e gateway]\n" 288 "\t [-I interface] [-i wait] [-k addrtype] [-l preload] " 289 "[-m hoplimit]\n" 290 "\t [-p pattern]" 291#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 292 " [-P policy]" 293#endif 294 " [-S sourceaddr] [-s packetsize] [-t timeout]\n" 295 "\t [-W waittime] [-z tclass] [IPv6-hops ...] IPv6-host\n" 296#endif /* INET6 */ 297 ); 298 299 exit(1); 300} 301