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 #ifdef __HAIKU__ 65 #define optreset optind 66 #define feature_present(x) true 67 #ifndef restrict 68 #define restrict 69 #endif 70 #endif 71 72 /* various options */ 73 u_int options; 74 75 char *hostname; 76 77 /* counters */ 78 long nreceived; /* # of packets we got back */ 79 long nrepeats; /* number of duplicates */ 80 long ntransmitted; /* sequence # for outbound packets = #sent */ 81 long nrcvtimeout = 0; /* # of packets we got back after waittime */ 82 83 /* nonzero if we've been told to finish up */ 84 volatile sig_atomic_t seenint; 85 volatile sig_atomic_t seeninfo; 86 87 /* timing */ 88 int timing; /* flag to do timing */ 89 double tmin = 999999999.0; /* minimum round trip time */ 90 double tmax = 0.0; /* maximum round trip time */ 91 double tsum = 0.0; /* sum of all times, for doing average */ 92 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 93 94 int 95 main(int argc, char *argv[]) 96 { 97 #if defined(INET) 98 struct in_addr a; 99 #endif 100 #if defined(INET6) 101 struct in6_addr a6; 102 #endif 103 #if defined(INET) && defined(INET6) 104 struct addrinfo hints, *res, *ai; 105 const char *target; 106 int error; 107 #endif 108 int opt; 109 110 #ifdef INET6 111 if (strcmp(getprogname(), "ping6") == 0) 112 return ping6(argc, argv); 113 #endif 114 115 while ((opt = getopt(argc, argv, ":" OPTSTR)) != -1) { 116 switch (opt) { 117 #ifdef INET 118 case '4': 119 goto ping4; 120 #endif 121 #ifdef INET6 122 case '6': 123 goto ping6; 124 #endif 125 case 'S': 126 /* 127 * If -S is given with a numeric parameter, 128 * force use of the corresponding version. 129 */ 130 #ifdef INET 131 if (inet_pton(AF_INET, optarg, &a) == 1) 132 goto ping4; 133 #endif 134 #ifdef INET6 135 if (inet_pton(AF_INET6, optarg, &a6) == 1) 136 goto ping6; 137 #endif 138 break; 139 default: 140 break; 141 } 142 } 143 144 /* 145 * For IPv4, only one positional argument, the target, is allowed. 146 * For IPv6, multiple positional argument are allowed; the last 147 * one is the target, and preceding ones are intermediate hops. 148 * This nuance is lost here, but the only case where it matters is 149 * an error. 150 */ 151 if (optind >= argc) 152 usage(); 153 154 #if defined(INET) && defined(INET6) 155 target = argv[argc - 1]; 156 memset(&hints, 0, sizeof(hints)); 157 hints.ai_socktype = SOCK_RAW; 158 #ifdef __HAIKU__ 159 hints.ai_flags = AI_ADDRCONFIG; 160 #endif 161 if (feature_present("inet") && !feature_present("inet6")) 162 hints.ai_family = AF_INET; 163 if (feature_present("inet6") && !feature_present("inet")) 164 hints.ai_family = AF_INET6; 165 else 166 hints.ai_family = AF_UNSPEC; 167 error = getaddrinfo(target, NULL, &hints, &res); 168 if (res == NULL) 169 errx(EX_NOHOST, "cannot resolve %s: %s", 170 target, gai_strerror(error)); 171 for (ai = res; ai != NULL; ai = ai->ai_next) { 172 if (ai->ai_family == AF_INET) { 173 freeaddrinfo(res); 174 goto ping4; 175 } 176 if (ai->ai_family == AF_INET6) { 177 freeaddrinfo(res); 178 goto ping6; 179 } 180 } 181 freeaddrinfo(res); 182 errx(EX_NOHOST, "cannot resolve %s", target); 183 #endif 184 #ifdef INET 185 ping4: 186 optreset = 1; 187 optind = 1; 188 return ping(argc, argv); 189 #endif 190 #ifdef INET6 191 ping6: 192 optreset = 1; 193 optind = 1; 194 return ping6(argc, argv); 195 #endif 196 } 197 198 /* 199 * onsignal -- 200 * Set the global bit that causes the main loop to quit. 201 */ 202 void 203 onsignal(int sig) 204 { 205 switch (sig) { 206 case SIGALRM: 207 case SIGINT: 208 /* 209 * When doing reverse DNS lookups, the seenint flag might not 210 * be noticed for a while. Just exit if we get a second SIGINT. 211 */ 212 if (!(options & F_HOSTNAME) && seenint != 0) 213 _exit(nreceived ? 0 : 2); 214 seenint++; 215 break; 216 #ifndef __HAIKU__ 217 case SIGINFO: 218 seeninfo++; 219 break; 220 #endif 221 } 222 } 223 224 /* 225 * pr_summary -- 226 * Print out summary statistics to the given output stream. 227 */ 228 void 229 pr_summary(FILE * restrict stream) 230 { 231 fprintf(stream, "\n--- %s ping statistics ---\n", hostname); 232 fprintf(stream, "%ld packets transmitted, ", ntransmitted); 233 fprintf(stream, "%ld packets received, ", nreceived); 234 if (nrepeats) 235 fprintf(stream, "+%ld duplicates, ", nrepeats); 236 if (ntransmitted) { 237 if (nreceived > ntransmitted) 238 fprintf(stream, "-- somebody's duplicating packets!"); 239 else 240 fprintf(stream, "%.1f%% packet loss", 241 ((((double)ntransmitted - nreceived) * 100.0) / 242 ntransmitted)); 243 } 244 if (nrcvtimeout) 245 fprintf(stream, ", %ld packets out of wait time", nrcvtimeout); 246 fputc('\n', stream); 247 if (nreceived && timing) { 248 /* Only display average to microseconds */ 249 double num = nreceived + nrepeats; 250 double avg = tsum / num; 251 double stddev = sqrt(fmax(0, tsumsq / num - avg * avg)); 252 fprintf(stream, 253 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", 254 tmin, avg, tmax, stddev); 255 } 256 fflush(stream); 257 } 258 259 void 260 usage(void) 261 { 262 (void)fprintf(stderr, 263 "usage:\n" 264 #ifdef INET 265 "\tping [-4AaDdfHnoQqRrv] [-C pcp] [-c count] " 266 "[-G sweepmaxsize]\n" 267 "\t [-g sweepminsize] [-h sweepincrsize] [-i wait] " 268 "[-l preload]\n" 269 "\t [-M mask | time] [-m ttl] " 270 #ifdef IPSEC 271 "[-P policy] " 272 #endif 273 "[-p pattern] [-S src_addr] \n" 274 "\t [-s packetsize] [-t timeout] [-W waittime] [-z tos] " 275 "IPv4-host\n" 276 "\tping [-4AaDdfHLnoQqRrv] [-C pcp] [-c count] [-I iface] " 277 "[-i wait]\n" 278 "\t [-l preload] [-M mask | time] [-m ttl] " 279 #ifdef IPSEC 280 "[-P policy] " 281 #endif 282 "[-p pattern]\n" 283 "\t [-S src_addr] [-s packetsize] [-T ttl] [-t timeout] [-W waittime]\n" 284 "\t [-z tos] IPv4-mcast-group\n" 285 #endif /* INET */ 286 #ifdef INET6 287 "\tping [-6AaDd" 288 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) 289 "E" 290 #endif 291 "fHnNoOq" 292 #ifdef IPV6_USE_MIN_MTU 293 "u" 294 #endif 295 "vyY" 296 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) 297 "Z" 298 #endif 299 "] " 300 "[-b bufsiz] [-C pcp] [-c count] [-e gateway]\n" 301 "\t [-I interface] [-i wait] [-k addrtype] [-l preload] " 302 "[-m hoplimit]\n" 303 "\t [-p pattern]" 304 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 305 " [-P policy]" 306 #endif 307 " [-S sourceaddr] [-s packetsize] [-t timeout]\n" 308 "\t [-W waittime] [-z tclass] [IPv6-hops ...] IPv6-host\n" 309 #endif /* INET6 */ 310 ); 311 312 exit(1); 313 } 314