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/cdefs.h> 30 #include <sys/types.h> 31 #include <sys/socket.h> 32 33 #include <arpa/inet.h> 34 #include <netdb.h> 35 #include <netinet/in.h> 36 37 #include <err.h> 38 #include <math.h> 39 #include <signal.h> 40 #include <stdbool.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <sysexits.h> 45 #include <unistd.h> 46 47 #include "main.h" 48 #ifdef INET 49 #include "ping.h" 50 #endif 51 #ifdef INET6 52 #include "ping6.h" 53 #endif 54 55 #if defined(INET) && defined(INET6) 56 #define OPTSTR PING6OPTS PING4OPTS 57 #elif defined(INET) 58 #define OPTSTR PING4OPTS 59 #elif defined(INET6) 60 #define OPTSTR PING6OPTS 61 #else 62 #error At least one of INET and INET6 is required 63 #endif 64 65 /* various options */ 66 u_int options; 67 68 char *hostname; 69 70 /* counters */ 71 long nreceived; /* # of packets we got back */ 72 long nrepeats; /* number of duplicates */ 73 long ntransmitted; /* sequence # for outbound packets = #sent */ 74 long nrcvtimeout = 0; /* # of packets we got back after waittime */ 75 76 /* nonzero if we've been told to finish up */ 77 volatile sig_atomic_t seenint; 78 volatile sig_atomic_t seeninfo; 79 80 /* timing */ 81 int timing; /* flag to do timing */ 82 double tmin = 999999999.0; /* minimum round trip time */ 83 double tmax = 0.0; /* maximum round trip time */ 84 double tsum = 0.0; /* sum of all times, for doing average */ 85 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 86 87 int 88 main(int argc, char *argv[]) 89 { 90 #if defined(INET) 91 struct in_addr a; 92 #endif 93 #if defined(INET6) 94 struct in6_addr a6; 95 #endif 96 #if defined(INET) && defined(INET6) 97 struct addrinfo hints, *res, *ai; 98 const char *target; 99 int error; 100 #endif 101 int opt; 102 103 #ifdef INET6 104 if (strcmp(getprogname(), "ping6") == 0) 105 return ping6(argc, argv); 106 #endif 107 108 while ((opt = getopt(argc, argv, ":" OPTSTR)) != -1) { 109 switch (opt) { 110 #ifdef INET 111 case '4': 112 goto ping4; 113 #endif 114 #ifdef INET6 115 case '6': 116 goto ping6; 117 #endif 118 case 'S': 119 /* 120 * If -S is given with a numeric parameter, 121 * force use of the corresponding version. 122 */ 123 #ifdef INET 124 if (inet_pton(AF_INET, optarg, &a) == 1) 125 goto ping4; 126 #endif 127 #ifdef INET6 128 if (inet_pton(AF_INET6, optarg, &a6) == 1) 129 goto ping6; 130 #endif 131 break; 132 default: 133 break; 134 } 135 } 136 137 /* 138 * For IPv4, only one positional argument, the target, is allowed. 139 * For IPv6, multiple positional argument are allowed; the last 140 * one is the target, and preceding ones are intermediate hops. 141 * This nuance is lost here, but the only case where it matters is 142 * an error. 143 */ 144 if (optind >= argc) 145 usage(); 146 147 #if defined(INET) && defined(INET6) 148 target = argv[argc - 1]; 149 memset(&hints, 0, sizeof(hints)); 150 hints.ai_socktype = SOCK_RAW; 151 if (feature_present("inet") && !feature_present("inet6")) 152 hints.ai_family = AF_INET; 153 if (feature_present("inet6") && !feature_present("inet")) 154 hints.ai_family = AF_INET6; 155 else 156 hints.ai_family = AF_UNSPEC; 157 error = getaddrinfo(target, NULL, &hints, &res); 158 if (res == NULL) 159 errx(EX_NOHOST, "cannot resolve %s: %s", 160 target, gai_strerror(error)); 161 for (ai = res; ai != NULL; ai = ai->ai_next) { 162 if (ai->ai_family == AF_INET) { 163 freeaddrinfo(res); 164 goto ping4; 165 } 166 if (ai->ai_family == AF_INET6) { 167 freeaddrinfo(res); 168 goto ping6; 169 } 170 } 171 freeaddrinfo(res); 172 errx(EX_NOHOST, "cannot resolve %s", target); 173 #endif 174 #ifdef INET 175 ping4: 176 optreset = 1; 177 optind = 1; 178 return ping(argc, argv); 179 #endif 180 #ifdef INET6 181 ping6: 182 optreset = 1; 183 optind = 1; 184 return ping6(argc, argv); 185 #endif 186 } 187 188 /* 189 * onsignal -- 190 * Set the global bit that causes the main loop to quit. 191 */ 192 void 193 onsignal(int sig) 194 { 195 switch (sig) { 196 case SIGALRM: 197 case SIGINT: 198 /* 199 * When doing reverse DNS lookups, the seenint flag might not 200 * be noticed for a while. Just exit if we get a second SIGINT. 201 */ 202 if (!(options & F_HOSTNAME) && seenint != 0) 203 _exit(nreceived ? 0 : 2); 204 seenint++; 205 break; 206 case SIGINFO: 207 seeninfo++; 208 break; 209 } 210 } 211 212 /* 213 * pr_summary -- 214 * Print out summary statistics to the given output stream. 215 */ 216 void 217 pr_summary(FILE * restrict stream) 218 { 219 fprintf(stream, "\n--- %s ping statistics ---\n", hostname); 220 fprintf(stream, "%ld packets transmitted, ", ntransmitted); 221 fprintf(stream, "%ld packets received, ", nreceived); 222 if (nrepeats) 223 fprintf(stream, "+%ld duplicates, ", nrepeats); 224 if (ntransmitted) { 225 if (nreceived > ntransmitted) 226 fprintf(stream, "-- somebody's duplicating packets!"); 227 else 228 fprintf(stream, "%.1f%% packet loss", 229 ((((double)ntransmitted - nreceived) * 100.0) / 230 ntransmitted)); 231 } 232 if (nrcvtimeout) 233 fprintf(stream, ", %ld packets out of wait time", nrcvtimeout); 234 fputc('\n', stream); 235 if (nreceived && timing) { 236 /* Only display average to microseconds */ 237 double num = nreceived + nrepeats; 238 double avg = tsum / num; 239 double stddev = sqrt(fmax(0, tsumsq / num - avg * avg)); 240 fprintf(stream, 241 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", 242 tmin, avg, tmax, stddev); 243 } 244 fflush(stream); 245 } 246 247 void 248 usage(void) 249 { 250 (void)fprintf(stderr, 251 "usage:\n" 252 #ifdef INET 253 "\tping [-4AaDdfHnoQqRrv] [-C pcp] [-c count] " 254 "[-G sweepmaxsize]\n" 255 "\t [-g sweepminsize] [-h sweepincrsize] [-i wait] " 256 "[-l preload]\n" 257 "\t [-M mask | time] [-m ttl] " 258 #ifdef IPSEC 259 "[-P policy] " 260 #endif 261 "[-p pattern] [-S src_addr] \n" 262 "\t [-s packetsize] [-t timeout] [-W waittime] [-z tos] " 263 "IPv4-host\n" 264 "\tping [-4AaDdfHLnoQqRrv] [-C pcp] [-c count] [-I iface] " 265 "[-i wait]\n" 266 "\t [-l preload] [-M mask | time] [-m ttl] " 267 #ifdef IPSEC 268 "[-P policy] " 269 #endif 270 "[-p pattern]\n" 271 "\t [-S src_addr] [-s packetsize] [-T ttl] [-t timeout] [-W waittime]\n" 272 "\t [-z tos] IPv4-mcast-group\n" 273 #endif /* INET */ 274 #ifdef INET6 275 "\tping [-6AaDd" 276 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) 277 "E" 278 #endif 279 "fHnNoOq" 280 #ifdef IPV6_USE_MIN_MTU 281 "u" 282 #endif 283 "vyY" 284 #if defined(IPSEC) && !defined(IPSEC_POLICY_IPSEC) 285 "Z" 286 #endif 287 "] " 288 "[-b bufsiz] [-C pcp] [-c count] [-e gateway]\n" 289 "\t [-I interface] [-i wait] [-k addrtype] [-l preload] " 290 "[-m hoplimit]\n" 291 "\t [-p pattern]" 292 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 293 " [-P policy]" 294 #endif 295 " [-S sourceaddr] [-s packetsize] [-t timeout]\n" 296 "\t [-W waittime] [-z tclass] [IPv6-hops ...] IPv6-host\n" 297 #endif /* INET6 */ 298 ); 299 300 exit(1); 301 } 302