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
main(int argc,char * argv[])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 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
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
onsignal(int sig)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
pr_summary(FILE * restrict stream)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
usage(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