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 */ 65 u_int options; 66 67 char *hostname; 68 69 /* counters */ 70 long nreceived; /* # of packets we got back */ 71 long nrepeats; /* number of duplicates */ 72 long ntransmitted; /* sequence # for outbound packets = #sent */ 73 long nrcvtimeout = 0; /* # of packets we got back after waittime */ 74 75 /* nonzero if we've been told to finish up */ 76 volatile sig_atomic_t seenint; 77 volatile sig_atomic_t seeninfo; 78 79 /* timing */ 80 int timing; /* flag to do timing */ 81 double tmin = 999999999.0; /* minimum round trip time */ 82 double tmax = 0.0; /* maximum round trip time */ 83 double tsum = 0.0; /* sum of all times, for doing average */ 84 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 85 86 int 87 main(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 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 174 ping4: 175 optreset = 1; 176 optind = 1; 177 return ping(argc, argv); 178 #endif 179 #ifdef INET6 180 ping6: 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 */ 191 void 192 onsignal(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 */ 215 void 216 pr_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 } 245 246 void 247 usage(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