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[apple/network_cmds.git] / ping.tproj / ping.c
1 /*
2 * Copyright (c) 1999-2013 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28 /*
29 * Copyright (c) 1989, 1993
30 * The Regents of the University of California. All rights reserved.
31 *
32 * This code is derived from software contributed to Berkeley by
33 * Mike Muuss.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 * 1. Redistributions of source code must retain the above copyright
39 * notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 * notice, this list of conditions and the following disclaimer in the
42 * documentation and/or other materials provided with the distribution.
43 * 4. Neither the name of the University nor the names of its contributors
44 * may be used to endorse or promote products derived from this software
45 * without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
57 * SUCH DAMAGE.
58 */
59
60 #if 0
61 #ifndef lint
62 static const char copyright[] =
63 "@(#) Copyright (c) 1989, 1993\n\
64 The Regents of the University of California. All rights reserved.\n";
65 #endif /* not lint */
66
67 #ifndef lint
68 static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93";
69 #endif /* not lint */
70 #endif
71 #include <sys/cdefs.h>
72
73 /*
74 * P I N G . C
75 *
76 * Using the Internet Control Message Protocol (ICMP) "ECHO" facility,
77 * measure round-trip-delays and packet loss across network paths.
78 *
79 * Author -
80 * Mike Muuss
81 * U. S. Army Ballistic Research Laboratory
82 * December, 1983
83 *
84 * Status -
85 * Public Domain. Distribution Unlimited.
86 * Bugs -
87 * More statistics could always be gathered.
88 * This program has to run SUID to ROOT to access the ICMP socket.
89 */
90
91 #include <sys/param.h> /* NB: we rely on this for <sys/types.h> */
92 #include <sys/socket.h>
93 #include <sys/sysctl.h>
94 #include <sys/time.h>
95 #include <sys/uio.h>
96
97 #include <netinet/in.h>
98 #include <netinet/in_systm.h>
99 #include <netinet/ip.h>
100 #include <netinet/ip_icmp.h>
101 #include <netinet/ip_var.h>
102 #include <arpa/inet.h>
103 #include <net/if.h>
104
105 #ifdef IPSEC
106 #include <netinet6/ipsec.h>
107 #endif /*IPSEC*/
108
109 #include <ctype.h>
110 #include <err.h>
111 #include <errno.h>
112 #include <math.h>
113 #include <netdb.h>
114 #include <signal.h>
115 #include <stdio.h>
116 #include <stdlib.h>
117 #include <string.h>
118 #include <sysexits.h>
119 #include <unistd.h>
120 #include <ifaddrs.h>
121
122 #define INADDR_LEN ((int)sizeof(in_addr_t))
123 #define TIMEVAL_LEN ((int)sizeof(struct tv32))
124 #define MASK_LEN (ICMP_MASKLEN - ICMP_MINLEN)
125 #define TS_LEN (ICMP_TSLEN - ICMP_MINLEN)
126 #define DEFDATALEN 56 /* default data length */
127 #define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */
128 /* runs out of buffer space */
129 #define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN)
130 #define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN)
131 #define MAXWAIT 10000 /* max ms to wait for response */
132 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */
133 #define MAXTOS 255
134
135 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
136 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
137 #define SET(bit) (A(bit) |= B(bit))
138 #define CLR(bit) (A(bit) &= (~B(bit)))
139 #define TST(bit) (A(bit) & B(bit))
140
141 struct tv32 {
142 u_int32_t tv32_sec;
143 u_int32_t tv32_usec;
144 };
145
146 /* various options */
147 int options;
148 #define F_FLOOD 0x0001
149 #define F_INTERVAL 0x0002
150 #define F_NUMERIC 0x0004
151 #define F_PINGFILLED 0x0008
152 #define F_QUIET 0x0010
153 #define F_RROUTE 0x0020
154 #define F_SO_DEBUG 0x0040
155 #define F_SO_DONTROUTE 0x0080
156 #define F_VERBOSE 0x0100
157 #define F_QUIET2 0x0200
158 #define F_NOLOOP 0x0400
159 #define F_MTTL 0x0800
160 #define F_MIF 0x1000
161 #define F_AUDIBLE 0x2000
162 #ifdef IPSEC
163 #ifdef IPSEC_POLICY_IPSEC
164 #define F_POLICY 0x4000
165 #endif /*IPSEC_POLICY_IPSEC*/
166 #endif /*IPSEC*/
167 #define F_TTL 0x8000
168 #define F_MISSED 0x10000
169 #define F_ONCE 0x20000
170 #define F_HDRINCL 0x40000
171 #define F_MASK 0x80000
172 #define F_TIME 0x100000
173 #define F_SWEEP 0x200000
174 #define F_WAITTIME 0x400000
175
176 /*
177 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
178 * number of received sequence numbers we can keep track of. Change 128
179 * to 8192 for complete accuracy...
180 */
181 #define MAX_DUP_CHK (8 * 128)
182 int mx_dup_ck = MAX_DUP_CHK;
183 char rcvd_tbl[MAX_DUP_CHK / 8];
184
185 struct sockaddr_in whereto; /* who to ping */
186 int datalen = DEFDATALEN;
187 int maxpayload;
188 int s; /* socket file descriptor */
189 u_char outpackhdr[IP_MAXPACKET], *outpack;
190 char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */
191 char BSPACE = '\b'; /* characters written for flood */
192 char DOT = '.';
193 char *hostname;
194 char *shostname;
195 int ident; /* process id to identify our packets */
196 int uid; /* cached uid for micro-optimization */
197 u_char icmp_type = ICMP_ECHO;
198 u_char icmp_type_rsp = ICMP_ECHOREPLY;
199 int phdr_len = 0;
200 int send_len;
201 char *boundif;
202 unsigned int ifscope;
203 #if defined(IP_FORCE_OUT_IFP) && TARGET_OS_EMBEDDED
204 char boundifname[IFNAMSIZ];
205 #endif /* IP_FORCE_OUT_IFP */
206 int nocell;
207 int how_traffic_class = 0;
208 int traffic_class = SO_TC_CTL; /* use control class, by default */
209 int no_dup = 0;
210
211 /* counters */
212 long nmissedmax; /* max value of ntransmitted - nreceived - 1 */
213 long npackets; /* max packets to transmit */
214 long nreceived; /* # of packets we got back */
215 long nrepeats; /* number of duplicates */
216 long ntransmitted; /* sequence # for outbound packets = #sent */
217 long snpackets; /* max packets to transmit in one sweep */
218 long snreceived; /* # of packets we got back in this sweep */
219 long sntransmitted; /* # of packets we sent in this sweep */
220 int sweepmax; /* max value of payload in sweep */
221 int sweepmin = 0; /* start value of payload in sweep */
222 int sweepincr = 1; /* payload increment in sweep */
223 int interval = 1000; /* interval between packets, ms */
224 int waittime = MAXWAIT; /* timeout for each packet */
225 long nrcvtimeout = 0; /* # of packets we got back after waittime */
226
227 /* timing */
228 int timing; /* flag to do timing */
229 double tmin = 999999999.0; /* minimum round trip time */
230 double tmax = 0.0; /* maximum round trip time */
231 double tsum = 0.0; /* sum of all times, for doing average */
232 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */
233
234 volatile sig_atomic_t finish_up; /* nonzero if we've been told to finish up */
235 volatile sig_atomic_t siginfo_p;
236
237 static void fill(char *, char *);
238 static u_short in_cksum(u_short *, int);
239 static void check_status(void);
240 static void finish(void) __dead2;
241 static void pinger(void);
242 static char *pr_addr(struct in_addr);
243 static char *pr_ntime(n_time);
244 static void pr_icmph(struct icmp *);
245 static void pr_iph(struct ip *);
246 static void pr_pack(char *, int, struct sockaddr_in *, struct timeval *, int);
247 static void pr_retip(struct ip *);
248 static void status(int);
249 static void stopit(int);
250 static void tvsub(struct timeval *, const struct timeval *);
251 static void usage(void) __dead2;
252
253 int
254 main(int argc, char *const *argv)
255 {
256 struct sockaddr_in from, sock_in;
257 struct in_addr ifaddr;
258 struct timeval last, intvl;
259 struct iovec iov;
260 struct ip *ip;
261 struct msghdr msg;
262 struct sigaction si_sa;
263 size_t sz;
264 u_char *datap, packet[IP_MAXPACKET] __attribute__((aligned(4)));
265 char *ep, *source, *target, *payload;
266 struct hostent *hp;
267 #ifdef IPSEC_POLICY_IPSEC
268 char *policy_in, *policy_out;
269 #endif
270 struct sockaddr_in *to;
271 double t;
272 u_long alarmtimeout, ultmp;
273 int almost_done, ch, df, hold, i, icmp_len, mib[4], preload, sockerrno,
274 tos, ttl;
275 char ctrl[CMSG_SPACE(sizeof(struct timeval)) + CMSG_SPACE(sizeof(int))];
276 char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN];
277 #ifdef IP_OPTIONS
278 char rspace[MAX_IPOPTLEN]; /* record route space */
279 #endif
280 unsigned char loop, mttl;
281
282 payload = source = NULL;
283 #ifdef IPSEC_POLICY_IPSEC
284 policy_in = policy_out = NULL;
285 #endif
286
287 /*
288 * Do the stuff that we need root priv's for *first*, and
289 * then drop our setuid bit. Save error reporting for
290 * after arg parsing.
291 */
292 if (getuid())
293 s = socket(AF_INET, SOCK_DGRAM, IPPROTO_ICMP);
294 else
295 s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
296 sockerrno = errno;
297
298 if (setuid(getuid()) != 0)
299 err(EX_NOPERM, "setuid() failed");
300 uid = getuid();
301
302 alarmtimeout = df = preload = tos = 0;
303
304 outpack = outpackhdr + sizeof(struct ip);
305 while ((ch = getopt(argc, argv,
306 "Aab:Cc:DdfG:g:h:I:i:k:Ll:M:m:nop:QqRrS:s:T:t:vW:z:"
307 #ifdef IPSEC
308 #ifdef IPSEC_POLICY_IPSEC
309 "P:"
310 #endif /*IPSEC_POLICY_IPSEC*/
311 #endif /*IPSEC*/
312 #if defined(IP_FORCE_OUT_IFP) && TARGET_OS_EMBEDDED
313 "B:"
314 #endif /* IP_FORCE_OUT_IFP */
315 )) != -1)
316 {
317 switch(ch) {
318 case 'A':
319 options |= F_MISSED;
320 break;
321 case 'a':
322 options |= F_AUDIBLE;
323 break;
324 #if defined(IP_FORCE_OUT_IFP) && TARGET_OS_EMBEDDED
325 case 'B':
326 (void) snprintf(boundifname, sizeof (boundifname),
327 "%s", optarg);
328 break;
329 #endif /* IP_FORCE_OUT_IFP */
330 case 'b':
331 boundif = optarg;
332 break;
333 case 'C':
334 nocell++;
335 break;
336 case 'c':
337 ultmp = strtoul(optarg, &ep, 0);
338 if (*ep || ep == optarg || ultmp > LONG_MAX || !ultmp)
339 errx(EX_USAGE,
340 "invalid count of packets to transmit: `%s'",
341 optarg);
342 npackets = ultmp;
343 break;
344 case 'D':
345 options |= F_HDRINCL;
346 df = 1;
347 break;
348 case 'd':
349 options |= F_SO_DEBUG;
350 break;
351 case 'f':
352 if (uid) {
353 errno = EPERM;
354 err(EX_NOPERM, "-f flag");
355 }
356 options |= F_FLOOD;
357 setbuf(stdout, (char *)NULL);
358 break;
359 case 'G': /* Maximum packet size for ping sweep */
360 ultmp = strtoul(optarg, &ep, 0);
361 if (*ep || ep == optarg)
362 errx(EX_USAGE, "invalid packet size: `%s'",
363 optarg);
364 #ifndef __APPLE__
365 if (uid != 0 && ultmp > DEFDATALEN) {
366 errno = EPERM;
367 err(EX_NOPERM,
368 "packet size too large: %lu > %u",
369 ultmp, DEFDATALEN);
370 }
371 #endif /* __APPLE__ */
372 options |= F_SWEEP;
373 sweepmax = ultmp;
374 break;
375 case 'g': /* Minimum packet size for ping sweep */
376 ultmp = strtoul(optarg, &ep, 0);
377 if (*ep || ep == optarg)
378 errx(EX_USAGE, "invalid packet size: `%s'",
379 optarg);
380 #ifndef __APPLE__
381 if (uid != 0 && ultmp > DEFDATALEN) {
382 errno = EPERM;
383 err(EX_NOPERM,
384 "packet size too large: %lu > %u",
385 ultmp, DEFDATALEN);
386 }
387 #endif /* __APPLE__ */
388 options |= F_SWEEP;
389 sweepmin = ultmp;
390 break;
391 case 'h': /* Packet size increment for ping sweep */
392 ultmp = strtoul(optarg, &ep, 0);
393 if (*ep || ep == optarg || ultmp < 1)
394 errx(EX_USAGE, "invalid increment size: `%s'",
395 optarg);
396 #ifndef __APPLE__
397 if (uid != 0 && ultmp > DEFDATALEN) {
398 errno = EPERM;
399 err(EX_NOPERM,
400 "packet size too large: %lu > %u",
401 ultmp, DEFDATALEN);
402 }
403 #endif /* __APPLE__ */
404 options |= F_SWEEP;
405 sweepincr = ultmp;
406 break;
407 case 'I': /* multicast interface */
408 if (inet_aton(optarg, &ifaddr) == 0)
409 errx(EX_USAGE,
410 "invalid multicast interface: `%s'",
411 optarg);
412 options |= F_MIF;
413 break;
414 case 'i': /* wait between sending packets */
415 t = strtod(optarg, &ep) * 1000.0;
416 if (*ep || ep == optarg || t > (double)INT_MAX)
417 errx(EX_USAGE, "invalid timing interval: `%s'",
418 optarg);
419 options |= F_INTERVAL;
420 interval = (int)t;
421 if (uid && interval < 100) {
422 errno = EPERM;
423 err(EX_NOPERM, "-i interval too short");
424 }
425 break;
426 case 'k':
427 how_traffic_class++;
428 traffic_class = atoi(optarg);
429 break;
430 case 'L':
431 options |= F_NOLOOP;
432 loop = 0;
433 break;
434 case 'l':
435 ultmp = strtoul(optarg, &ep, 0);
436 if (*ep || ep == optarg || ultmp > INT_MAX)
437 errx(EX_USAGE,
438 "invalid preload value: `%s'", optarg);
439 if (uid) {
440 errno = EPERM;
441 err(EX_NOPERM, "-l flag");
442 }
443 preload = ultmp;
444 break;
445 case 'M':
446 switch(optarg[0]) {
447 case 'M':
448 case 'm':
449 options |= F_MASK;
450 break;
451 case 'T':
452 case 't':
453 options |= F_TIME;
454 break;
455 default:
456 errx(EX_USAGE, "invalid message: `%c'", optarg[0]);
457 break;
458 }
459 break;
460 case 'm': /* TTL */
461 ultmp = strtoul(optarg, &ep, 0);
462 if (*ep || ep == optarg || ultmp > MAXTTL)
463 errx(EX_USAGE, "invalid TTL: `%s'", optarg);
464 ttl = ultmp;
465 options |= F_TTL;
466 break;
467 case 'n':
468 options |= F_NUMERIC;
469 break;
470 case 'o':
471 options |= F_ONCE;
472 break;
473 #ifdef IPSEC
474 #ifdef IPSEC_POLICY_IPSEC
475 case 'P':
476 options |= F_POLICY;
477 if (!strncmp("in", optarg, 2))
478 policy_in = strdup(optarg);
479 else if (!strncmp("out", optarg, 3))
480 policy_out = strdup(optarg);
481 else
482 errx(1, "invalid security policy");
483 break;
484 #endif /*IPSEC_POLICY_IPSEC*/
485 #endif /*IPSEC*/
486 case 'p': /* fill buffer with user pattern */
487 options |= F_PINGFILLED;
488 payload = optarg;
489 break;
490 case 'Q':
491 options |= F_QUIET2;
492 break;
493 case 'q':
494 options |= F_QUIET;
495 break;
496 case 'R':
497 options |= F_RROUTE;
498 break;
499 case 'r':
500 options |= F_SO_DONTROUTE;
501 break;
502 case 'S':
503 source = optarg;
504 break;
505 case 's': /* size of packet to send */
506 ultmp = strtoul(optarg, &ep, 0);
507 if (*ep || ep == optarg)
508 errx(EX_USAGE, "invalid packet size: `%s'",
509 optarg);
510 #ifndef __APPLE__
511 if (uid != 0 && ultmp > DEFDATALEN) {
512 errno = EPERM;
513 err(EX_NOPERM,
514 "packet size too large: %lu > %u",
515 ultmp, DEFDATALEN);
516 }
517 #endif /* __APPLE__ */
518 datalen = ultmp;
519 break;
520 case 'T': /* multicast TTL */
521 ultmp = strtoul(optarg, &ep, 0);
522 if (*ep || ep == optarg || ultmp > MAXTTL)
523 errx(EX_USAGE, "invalid multicast TTL: `%s'",
524 optarg);
525 mttl = ultmp;
526 options |= F_MTTL;
527 break;
528 case 't':
529 alarmtimeout = strtoul(optarg, &ep, 0);
530 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
531 errx(EX_USAGE, "invalid timeout: `%s'",
532 optarg);
533 if (alarmtimeout > MAXALARM)
534 errx(EX_USAGE, "invalid timeout: `%s' > %d",
535 optarg, MAXALARM);
536 alarm((unsigned int)alarmtimeout);
537 break;
538 case 'v':
539 options |= F_VERBOSE;
540 break;
541 case 'W': /* wait ms for answer */
542 t = strtod(optarg, &ep);
543 if (*ep || ep == optarg || t > (double)INT_MAX)
544 errx(EX_USAGE, "invalid timing interval: `%s'",
545 optarg);
546 options |= F_WAITTIME;
547 waittime = (int)t;
548 break;
549 case 'z':
550 options |= F_HDRINCL;
551 ultmp = strtoul(optarg, &ep, 0);
552 if (*ep || ep == optarg || ultmp > MAXTOS)
553 errx(EX_USAGE, "invalid TOS: `%s'", optarg);
554 tos = ultmp;
555 break;
556 default:
557 usage();
558 }
559 }
560
561 if (boundif != NULL && (ifscope = if_nametoindex(boundif)) == 0)
562 errx(1, "bad interface name");
563
564 if (argc - optind != 1)
565 usage();
566 target = argv[optind];
567
568 switch (options & (F_MASK|F_TIME)) {
569 case 0: break;
570 case F_MASK:
571 icmp_type = ICMP_MASKREQ;
572 icmp_type_rsp = ICMP_MASKREPLY;
573 phdr_len = MASK_LEN;
574 if (!(options & F_QUIET))
575 (void)printf("ICMP_MASKREQ\n");
576 break;
577 case F_TIME:
578 icmp_type = ICMP_TSTAMP;
579 icmp_type_rsp = ICMP_TSTAMPREPLY;
580 phdr_len = TS_LEN;
581 if (!(options & F_QUIET))
582 (void)printf("ICMP_TSTAMP\n");
583 break;
584 default:
585 errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive.");
586 break;
587 }
588 icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len;
589 if (options & F_RROUTE)
590 icmp_len += MAX_IPOPTLEN;
591 maxpayload = IP_MAXPACKET - icmp_len;
592 if (datalen > maxpayload)
593 errx(EX_USAGE, "packet size too large: %d > %d", datalen,
594 maxpayload);
595 send_len = icmp_len + datalen;
596 datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN];
597 if (options & F_PINGFILLED) {
598 fill((char *)datap, payload);
599 }
600 if (source) {
601 bzero((char *)&sock_in, sizeof(sock_in));
602 sock_in.sin_family = AF_INET;
603 if (inet_aton(source, &sock_in.sin_addr) != 0) {
604 shostname = source;
605 } else {
606 hp = gethostbyname2(source, AF_INET);
607 if (!hp)
608 errx(EX_NOHOST, "cannot resolve %s: %s",
609 source, hstrerror(h_errno));
610
611 sock_in.sin_len = sizeof sock_in;
612 if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) ||
613 hp->h_length < 0)
614 errx(1, "gethostbyname2: illegal address");
615 memcpy(&sock_in.sin_addr, hp->h_addr_list[0],
616 sizeof(sock_in.sin_addr));
617 (void)strncpy(snamebuf, hp->h_name,
618 sizeof(snamebuf) - 1);
619 snamebuf[sizeof(snamebuf) - 1] = '\0';
620 shostname = snamebuf;
621 }
622 if (bind(s, (struct sockaddr *)&sock_in, sizeof sock_in) == -1)
623 err(1, "bind");
624 }
625
626 bzero(&whereto, sizeof(whereto));
627 to = &whereto;
628 to->sin_family = AF_INET;
629 to->sin_len = sizeof *to;
630 if (inet_aton(target, &to->sin_addr) != 0) {
631 hostname = target;
632 } else {
633 hp = gethostbyname2(target, AF_INET);
634 if (!hp)
635 errx(EX_NOHOST, "cannot resolve %s: %s",
636 target, hstrerror(h_errno));
637
638 if ((unsigned)hp->h_length > sizeof(to->sin_addr))
639 errx(1, "gethostbyname2 returned an illegal address");
640 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr);
641 (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1);
642 hnamebuf[sizeof(hnamebuf) - 1] = '\0';
643 hostname = hnamebuf;
644 }
645
646 do {
647 struct ifaddrs *ifa_list, *ifa;
648
649 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr)) || whereto.sin_addr.s_addr == INADDR_BROADCAST) {
650 no_dup = 1;
651 break;
652 }
653
654 if (getifaddrs(&ifa_list) == -1)
655 break;
656 for (ifa = ifa_list; ifa; ifa = ifa->ifa_next) {
657 if (ifa->ifa_addr->sa_family != AF_INET)
658 continue;
659 if ((ifa->ifa_flags & IFF_BROADCAST) == 0 || ifa->ifa_broadaddr == NULL)
660 continue;
661 if (whereto.sin_addr.s_addr != ((struct sockaddr_in*)ifa->ifa_broadaddr)->sin_addr.s_addr)
662 continue;
663 no_dup = 1;
664 break;
665 }
666
667 freeifaddrs(ifa_list);
668 } while (0);
669
670 if (options & F_FLOOD && options & F_INTERVAL)
671 errx(EX_USAGE, "-f and -i: incompatible options");
672
673 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
674 errx(EX_USAGE,
675 "-f flag cannot be used with multicast destination");
676 if (options & (F_MIF | F_NOLOOP | F_MTTL)
677 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
678 errx(EX_USAGE,
679 "-I, -L, -T flags cannot be used with unicast destination");
680
681 if (datalen >= TIMEVAL_LEN) /* can we time transfer */
682 timing = 1;
683
684 if (!(options & F_PINGFILLED))
685 for (i = TIMEVAL_LEN; i < datalen; ++i)
686 *datap++ = i;
687
688 ident = getpid() & 0xFFFF;
689
690 if (s < 0) {
691 errno = sockerrno;
692 err(EX_OSERR, "socket");
693 }
694 hold = 1;
695 (void) setsockopt(s, SOL_SOCKET, SO_RECV_ANYIF, (char *)&hold,
696 sizeof(hold));
697 if (ifscope != 0) {
698 if (setsockopt(s, IPPROTO_IP, IP_BOUND_IF,
699 (char *)&ifscope, sizeof (ifscope)) != 0)
700 err(EX_OSERR, "setsockopt(IP_BOUND_IF)");
701 }
702 #if defined(IP_FORCE_OUT_IFP) && TARGET_OS_EMBEDDED
703 else if (boundifname[0] != 0) {
704 if (setsockopt(s, IPPROTO_IP, IP_FORCE_OUT_IFP, boundifname,
705 sizeof (boundifname)) != 0)
706 err(EX_OSERR, "setsockopt(IP_FORCE_OUT_IFP)");
707 }
708 #endif /* IP_FORCE_OUT_IFP */
709 if (nocell) {
710 if (setsockopt(s, IPPROTO_IP, IP_NO_IFT_CELLULAR,
711 (char *)&nocell, sizeof (nocell)) != 0)
712 err(EX_OSERR, "setsockopt(IP_NO_IFT_CELLULAR)");
713 }
714 if (options & F_SO_DEBUG)
715 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
716 sizeof(hold));
717 if (options & F_SO_DONTROUTE)
718 (void)setsockopt(s, SOL_SOCKET, SO_DONTROUTE, (char *)&hold,
719 sizeof(hold));
720 if (how_traffic_class < 2 && traffic_class >= 0) {
721 (void) setsockopt(s, SOL_SOCKET, SO_TRAFFIC_CLASS,
722 (void *)&traffic_class, sizeof (traffic_class));
723 }
724 if (how_traffic_class > 0) {
725 int on = 1;
726 (void) setsockopt(s, SOL_SOCKET, SO_RECV_TRAFFIC_CLASS,
727 (void *)&on, sizeof (on));
728 }
729 #ifdef IPSEC
730 #ifdef IPSEC_POLICY_IPSEC
731 if (options & F_POLICY) {
732 char *buf;
733 if (policy_in != NULL) {
734 buf = ipsec_set_policy(policy_in, strlen(policy_in));
735 if (buf == NULL)
736 errx(EX_CONFIG, "%s", ipsec_strerror());
737 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY,
738 buf, ipsec_get_policylen(buf)) < 0)
739 err(EX_CONFIG,
740 "ipsec policy cannot be configured");
741 free(buf);
742 }
743
744 if (policy_out != NULL) {
745 buf = ipsec_set_policy(policy_out, strlen(policy_out));
746 if (buf == NULL)
747 errx(EX_CONFIG, "%s", ipsec_strerror());
748 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY,
749 buf, ipsec_get_policylen(buf)) < 0)
750 err(EX_CONFIG,
751 "ipsec policy cannot be configured");
752 free(buf);
753 }
754 }
755 #endif /*IPSEC_POLICY_IPSEC*/
756 #endif /*IPSEC*/
757
758 if (options & F_HDRINCL) {
759 ip = (struct ip*)outpackhdr;
760 if (!(options & (F_TTL | F_MTTL))) {
761 mib[0] = CTL_NET;
762 mib[1] = PF_INET;
763 mib[2] = IPPROTO_IP;
764 mib[3] = IPCTL_DEFTTL;
765 sz = sizeof(ttl);
766 if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1)
767 err(1, "sysctl(net.inet.ip.ttl)");
768 }
769 setsockopt(s, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold));
770 ip->ip_v = IPVERSION;
771 ip->ip_hl = sizeof(struct ip) >> 2;
772 ip->ip_tos = tos;
773 ip->ip_id = 0;
774 ip->ip_off = df ? IP_DF : 0;
775 ip->ip_ttl = ttl;
776 ip->ip_p = IPPROTO_ICMP;
777 ip->ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY;
778 ip->ip_dst = to->sin_addr;
779 }
780 /* record route option */
781 if (options & F_RROUTE) {
782 #ifdef IP_OPTIONS
783 bzero(rspace, sizeof(rspace));
784 rspace[IPOPT_OPTVAL] = IPOPT_RR;
785 rspace[IPOPT_OLEN] = sizeof(rspace) - 1;
786 rspace[IPOPT_OFFSET] = IPOPT_MINOFF;
787 rspace[sizeof(rspace) - 1] = IPOPT_EOL;
788 if (setsockopt(s, IPPROTO_IP, IP_OPTIONS, rspace,
789 sizeof(rspace)) < 0)
790 err(EX_OSERR, "setsockopt IP_OPTIONS");
791 #else
792 errx(EX_UNAVAILABLE,
793 "record route not available in this implementation");
794 #endif /* IP_OPTIONS */
795 }
796
797 if (options & F_TTL) {
798 if (setsockopt(s, IPPROTO_IP, IP_TTL, &ttl,
799 sizeof(ttl)) < 0) {
800 err(EX_OSERR, "setsockopt IP_TTL");
801 }
802 }
803 if (options & F_NOLOOP) {
804 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &loop,
805 sizeof(loop)) < 0) {
806 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP");
807 }
808 }
809 if (options & F_MTTL) {
810 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &mttl,
811 sizeof(mttl)) < 0) {
812 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL");
813 }
814 }
815 if (options & F_MIF) {
816 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr,
817 sizeof(ifaddr)) < 0) {
818 err(EX_OSERR, "setsockopt IP_MULTICAST_IF");
819 }
820 }
821 #ifdef SO_TIMESTAMP
822 { int on = 1;
823 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)) < 0)
824 err(EX_OSERR, "setsockopt SO_TIMESTAMP");
825 }
826 #endif
827 if (sweepmax) {
828 if (sweepmin >= sweepmax)
829 errx(EX_USAGE, "Maximum packet size must be greater than the minimum packet size");
830
831 if (datalen != DEFDATALEN)
832 errx(EX_USAGE, "Packet size and ping sweep are mutually exclusive");
833
834 if (npackets > 0) {
835 snpackets = npackets;
836 npackets = 0;
837 } else
838 snpackets = 1;
839 datalen = sweepmin;
840 send_len = icmp_len + sweepmin;
841 }
842 if (options & F_SWEEP && !sweepmax)
843 errx(EX_USAGE, "Maximum sweep size must be specified");
844
845 /*
846 * When pinging the broadcast address, you can get a lot of answers.
847 * Doing something so evil is useful if you are trying to stress the
848 * ethernet, or just want to fill the arp cache to get some stuff for
849 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast
850 * or multicast pings if they wish.
851 */
852
853 /*
854 * XXX receive buffer needs undetermined space for mbuf overhead
855 * as well.
856 */
857 hold = IP_MAXPACKET + 128;
858 (void)setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
859 sizeof(hold));
860 if (uid == 0)
861 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char *)&hold,
862 sizeof(hold));
863
864 if (to->sin_family == AF_INET) {
865 (void)printf("PING %s (%s)", hostname,
866 inet_ntoa(to->sin_addr));
867 if (source)
868 (void)printf(" from %s", shostname);
869 if (sweepmax)
870 (void)printf(": (%d ... %d) data bytes\n",
871 sweepmin, sweepmax);
872 else
873 (void)printf(": %d data bytes\n", datalen);
874
875 } else {
876 if (sweepmax)
877 (void)printf("PING %s: (%d ... %d) data bytes\n",
878 hostname, sweepmin, sweepmax);
879 else
880 (void)printf("PING %s: %d data bytes\n", hostname, datalen);
881 }
882
883 /*
884 * Use sigaction() instead of signal() to get unambiguous semantics,
885 * in particular with SA_RESTART not set.
886 */
887
888 sigemptyset(&si_sa.sa_mask);
889 si_sa.sa_flags = 0;
890
891 si_sa.sa_handler = stopit;
892 if (sigaction(SIGINT, &si_sa, 0) == -1) {
893 err(EX_OSERR, "sigaction SIGINT");
894 }
895 si_sa.sa_handler = stopit;
896 if (sigaction(SIGQUIT, &si_sa, 0) == -1) {
897 err(EX_OSERR, "sigaction SIGQUIT");
898 }
899
900 si_sa.sa_handler = status;
901 if (sigaction(SIGINFO, &si_sa, 0) == -1) {
902 err(EX_OSERR, "sigaction SIGINFO");
903 }
904
905 if (alarmtimeout > 0) {
906 si_sa.sa_handler = stopit;
907 if (sigaction(SIGALRM, &si_sa, 0) == -1)
908 err(EX_OSERR, "sigaction SIGALRM");
909 }
910
911 bzero(&msg, sizeof(msg));
912 msg.msg_name = (caddr_t)&from;
913 msg.msg_iov = &iov;
914 msg.msg_iovlen = 1;
915 #ifdef SO_TIMESTAMP
916 msg.msg_control = (caddr_t)ctrl;
917 #endif
918 iov.iov_base = packet;
919 iov.iov_len = IP_MAXPACKET;
920
921 if (preload == 0)
922 pinger(); /* send the first ping */
923 else {
924 if (npackets != 0 && preload > npackets)
925 preload = npackets;
926 while (preload--) /* fire off them quickies */
927 pinger();
928 }
929 (void)gettimeofday(&last, NULL);
930
931 if (options & F_FLOOD) {
932 intvl.tv_sec = 0;
933 intvl.tv_usec = 10000;
934 } else {
935 intvl.tv_sec = interval / 1000;
936 intvl.tv_usec = interval % 1000 * 1000;
937 }
938
939 almost_done = 0;
940 while (!finish_up) {
941 struct timeval now, timeout;
942 fd_set rfds;
943 int cc, n;
944 int tc = -1;
945
946 check_status();
947 if ((unsigned)s >= FD_SETSIZE)
948 errx(EX_OSERR, "descriptor too large");
949 FD_ZERO(&rfds);
950 FD_SET(s, &rfds);
951 (void)gettimeofday(&now, NULL);
952 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
953 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
954 while (timeout.tv_usec < 0) {
955 timeout.tv_usec += 1000000;
956 timeout.tv_sec--;
957 }
958 while (timeout.tv_usec >= 1000000) {
959 timeout.tv_usec -= 1000000;
960 timeout.tv_sec++;
961 }
962 if (timeout.tv_sec < 0)
963 timeout.tv_sec = timeout.tv_usec = 0;
964 n = select(s + 1, &rfds, NULL, NULL, &timeout);
965 if (n < 0)
966 continue; /* Must be EINTR. */
967 if (n == 1) {
968 struct timeval *tv = NULL;
969 #ifdef SO_TIMESTAMP
970 struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl;
971
972 msg.msg_controllen = sizeof(ctrl);
973 #endif
974 msg.msg_namelen = sizeof(from);
975 if ((cc = recvmsg(s, &msg, 0)) < 0) {
976 if (errno == EINTR)
977 continue;
978 warn("recvmsg");
979 continue;
980 }
981 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
982 #ifdef SO_TIMESTAMP
983 if (cmsg->cmsg_level == SOL_SOCKET &&
984 cmsg->cmsg_type == SCM_TIMESTAMP &&
985 cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) {
986 /* Copy to avoid alignment problems: */
987 memcpy(&now, CMSG_DATA(cmsg), sizeof(now));
988 tv = &now;
989 }
990 #endif
991 if (cmsg->cmsg_level == SOL_SOCKET &&
992 cmsg->cmsg_type == SO_TRAFFIC_CLASS &&
993 cmsg->cmsg_len == CMSG_LEN(sizeof(int))) {
994 /* Copy to avoid alignment problems: */
995 memcpy(&tc, CMSG_DATA(cmsg), sizeof(tc));
996 }
997 }
998 if (tv == NULL) {
999 (void)gettimeofday(&now, NULL);
1000 tv = &now;
1001 }
1002 pr_pack((char *)packet, cc, &from, tv, tc);
1003 if ((options & F_ONCE && nreceived) ||
1004 (npackets && nreceived >= npackets))
1005 break;
1006 }
1007 if (n == 0 || options & F_FLOOD) {
1008 if (sweepmax && sntransmitted == snpackets) {
1009 for (i = 0; i < sweepincr ; ++i)
1010 *datap++ = i;
1011 datalen += sweepincr;
1012 if (datalen > sweepmax)
1013 break;
1014 send_len = icmp_len + datalen;
1015 sntransmitted = 0;
1016 }
1017 if (!npackets || ntransmitted < npackets)
1018 pinger();
1019 else {
1020 if (almost_done)
1021 break;
1022 almost_done = 1;
1023 intvl.tv_usec = 0;
1024 if (nreceived) {
1025 intvl.tv_sec = 2 * tmax / 1000;
1026 if (!intvl.tv_sec)
1027 intvl.tv_sec = 1;
1028 } else {
1029 intvl.tv_sec = waittime / 1000;
1030 intvl.tv_usec = waittime % 1000 * 1000;
1031 }
1032 }
1033 (void)gettimeofday(&last, NULL);
1034 if (ntransmitted - nreceived - 1 > nmissedmax) {
1035 nmissedmax = ntransmitted - nreceived - 1;
1036 if (options & F_MISSED)
1037 (void)write(STDOUT_FILENO, &BBELL, 1);
1038 if (!(options & F_QUIET))
1039 printf("Request timeout for icmp_seq %ld\n", ntransmitted - 2);
1040 }
1041 }
1042 }
1043 finish();
1044 /* NOTREACHED */
1045 exit(0); /* Make the compiler happy */
1046 }
1047
1048 /*
1049 * stopit --
1050 * Set the global bit that causes the main loop to quit.
1051 * Do NOT call finish() from here, since finish() does far too much
1052 * to be called from a signal handler.
1053 */
1054 void
1055 stopit(int sig __unused)
1056 {
1057
1058 /*
1059 * When doing reverse DNS lookups, the finish_up flag might not
1060 * be noticed for a while. Just exit if we get a second SIGINT.
1061 */
1062 if (!(options & F_NUMERIC) && finish_up)
1063 _exit(nreceived ? 0 : 2);
1064 finish_up = 1;
1065 }
1066
1067 /*
1068 * pinger --
1069 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
1070 * will be added on by the kernel. The ID field is our UNIX process ID,
1071 * and the sequence number is an ascending integer. The first TIMEVAL_LEN
1072 * bytes of the data portion are used to hold a UNIX "timeval" struct in
1073 * host byte-order, to compute the round-trip time.
1074 */
1075 static void
1076 pinger(void)
1077 {
1078 struct timeval now;
1079 struct tv32 tv32;
1080 struct ip *ip;
1081 struct icmp *icp;
1082 int cc, i;
1083 u_char *packet;
1084
1085 packet = outpack;
1086 icp = (struct icmp *)outpack;
1087 icp->icmp_type = icmp_type;
1088 icp->icmp_code = 0;
1089 icp->icmp_cksum = 0;
1090 icp->icmp_seq = htons(ntransmitted);
1091 icp->icmp_id = ident; /* ID */
1092
1093 CLR(ntransmitted % mx_dup_ck);
1094
1095 if ((options & F_TIME) || timing) {
1096 (void)gettimeofday(&now, NULL);
1097
1098 tv32.tv32_sec = htonl(now.tv_sec);
1099 tv32.tv32_usec = htonl(now.tv_usec);
1100 if (options & F_TIME)
1101 icp->icmp_otime = htonl((now.tv_sec % (24*60*60))
1102 * 1000 + now.tv_usec / 1000);
1103 if (timing)
1104 bcopy((void *)&tv32,
1105 (void *)&outpack[ICMP_MINLEN + phdr_len],
1106 sizeof(tv32));
1107 }
1108
1109 cc = ICMP_MINLEN + phdr_len + datalen;
1110
1111 /* compute ICMP checksum here */
1112 icp->icmp_cksum = in_cksum((u_short *)icp, cc);
1113
1114 if (options & F_HDRINCL) {
1115 cc += sizeof(struct ip);
1116 ip = (struct ip *)outpackhdr;
1117 ip->ip_len = cc;
1118 ip->ip_sum = in_cksum((u_short *)outpackhdr, cc);
1119 packet = outpackhdr;
1120 }
1121 if (how_traffic_class > 1 && traffic_class >= 0) {
1122 struct msghdr msg;
1123 struct iovec iov;
1124 char *cmbuf[CMSG_SPACE(sizeof(int))];
1125 struct cmsghdr *cm = (struct cmsghdr *)cmbuf;
1126
1127 msg.msg_name = &whereto;
1128 msg.msg_namelen = sizeof(whereto);
1129
1130 iov.iov_base = packet;
1131 iov.iov_len = cc;
1132 msg.msg_iov = &iov;
1133 msg.msg_iovlen = 1;
1134
1135 cm->cmsg_len = CMSG_LEN(sizeof(int));
1136 cm->cmsg_level = SOL_SOCKET;
1137 cm->cmsg_type = SO_TRAFFIC_CLASS;
1138 *(int *)CMSG_DATA(cm) = traffic_class;
1139 msg.msg_control = cm;
1140 msg.msg_controllen = CMSG_SPACE(sizeof(int));
1141
1142 msg.msg_flags = 0;
1143
1144 i = sendmsg(s, &msg, 0);
1145 } else {
1146 i = sendto(s, (char *)packet, cc, 0, (struct sockaddr *)&whereto,
1147 sizeof(whereto));
1148 }
1149 if (i < 0 || i != cc) {
1150 if (i < 0) {
1151 if (options & F_FLOOD && errno == ENOBUFS) {
1152 usleep(FLOOD_BACKOFF);
1153 return;
1154 }
1155 warn("sendto");
1156 } else {
1157 warn("%s: partial write: %d of %d bytes",
1158 hostname, i, cc);
1159 }
1160 }
1161 ntransmitted++;
1162 sntransmitted++;
1163 if (!(options & F_QUIET) && options & F_FLOOD)
1164 (void)write(STDOUT_FILENO, &DOT, 1);
1165 }
1166
1167 /*
1168 * pr_pack --
1169 * Print out the packet, if it came from us. This logic is necessary
1170 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1171 * which arrive ('tis only fair). This permits multiple copies of this
1172 * program to be run without having intermingled output (or statistics!).
1173 */
1174 static void
1175 pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timeval *tv,
1176 int tc)
1177 {
1178 struct in_addr ina;
1179 u_char *cp, *dp;
1180 struct icmp *icp;
1181 struct ip *ip;
1182 const void *tp;
1183 double triptime;
1184 int dupflag, hlen, i, j, recv_len, seq;
1185 static int old_rrlen;
1186 static char old_rr[MAX_IPOPTLEN];
1187
1188 /* Check the IP header */
1189 ip = (struct ip *)buf;
1190 hlen = ip->ip_hl << 2;
1191 recv_len = cc;
1192 if (cc < hlen + ICMP_MINLEN) {
1193 if (options & F_VERBOSE)
1194 warn("packet too short (%d bytes) from %s", cc,
1195 inet_ntoa(from->sin_addr));
1196 return;
1197 }
1198
1199 /* Now the ICMP part */
1200 cc -= hlen;
1201 icp = (struct icmp *)(buf + hlen);
1202 if (icp->icmp_type == icmp_type_rsp) {
1203 if (icp->icmp_id != ident)
1204 return; /* 'Twas not our ECHO */
1205 ++nreceived;
1206 triptime = 0.0;
1207 if (timing) {
1208 struct timeval tv1;
1209 struct tv32 tv32;
1210 #ifndef icmp_data
1211 tp = &icp->icmp_ip;
1212 #else
1213 tp = icp->icmp_data;
1214 #endif
1215 tp = (const char *)tp + phdr_len;
1216
1217 if (cc - ICMP_MINLEN - phdr_len >= sizeof(tv1)) {
1218 /* Copy to avoid alignment problems: */
1219 memcpy(&tv32, tp, sizeof(tv32));
1220 tv1.tv_sec = ntohl(tv32.tv32_sec);
1221 tv1.tv_usec = ntohl(tv32.tv32_usec);
1222 tvsub(tv, &tv1);
1223 triptime = ((double)tv->tv_sec) * 1000.0 +
1224 ((double)tv->tv_usec) / 1000.0;
1225 tsum += triptime;
1226 tsumsq += triptime * triptime;
1227 if (triptime < tmin)
1228 tmin = triptime;
1229 if (triptime > tmax)
1230 tmax = triptime;
1231 } else
1232 timing = 0;
1233 }
1234
1235 seq = ntohs(icp->icmp_seq);
1236
1237 if (TST(seq % mx_dup_ck)) {
1238 ++nrepeats;
1239 --nreceived;
1240 dupflag = 1;
1241 } else {
1242 SET(seq % mx_dup_ck);
1243 dupflag = 0;
1244 }
1245
1246 if (options & F_QUIET)
1247 return;
1248
1249 if (options & F_WAITTIME && triptime > waittime) {
1250 ++nrcvtimeout;
1251 return;
1252 }
1253
1254 if (options & F_FLOOD)
1255 (void)write(STDOUT_FILENO, &BSPACE, 1);
1256 else {
1257 (void)printf("%d bytes from %s: icmp_seq=%u", cc,
1258 inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr),
1259 seq);
1260 (void)printf(" ttl=%d", ip->ip_ttl);
1261 if (timing)
1262 (void)printf(" time=%.3f ms", triptime);
1263 if (tc != -1) {
1264 (void)printf(" tc=%d", tc);
1265 }
1266 if (dupflag && no_dup == 0) {
1267 (void)printf(" (DUP!)");
1268 }
1269 if (options & F_AUDIBLE)
1270 (void)write(STDOUT_FILENO, &BBELL, 1);
1271 if (options & F_MASK) {
1272 /* Just prentend this cast isn't ugly */
1273 (void)printf(" mask=%s",
1274 pr_addr(*(struct in_addr *)&(icp->icmp_mask)));
1275 }
1276 if (options & F_TIME) {
1277 (void)printf(" tso=%s", pr_ntime(icp->icmp_otime));
1278 (void)printf(" tsr=%s", pr_ntime(icp->icmp_rtime));
1279 (void)printf(" tst=%s", pr_ntime(icp->icmp_ttime));
1280 }
1281 if (recv_len != send_len) {
1282 (void)printf(
1283 "\nwrong total length %d instead of %d",
1284 recv_len, send_len);
1285 }
1286 /* check the data */
1287 cp = (u_char*)&icp->icmp_data[phdr_len];
1288 dp = &outpack[ICMP_MINLEN + phdr_len];
1289 cc -= ICMP_MINLEN + phdr_len;
1290 i = 0;
1291 if (timing) { /* don't check variable timestamp */
1292 cp += TIMEVAL_LEN;
1293 dp += TIMEVAL_LEN;
1294 cc -= TIMEVAL_LEN;
1295 i += TIMEVAL_LEN;
1296 }
1297 for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) {
1298 if (*cp != *dp) {
1299 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x",
1300 i, *dp, *cp);
1301 (void)printf("\ncp:");
1302 cp = (u_char*)&icp->icmp_data[0];
1303 for (i = 0; i < datalen; ++i, ++cp) {
1304 if ((i % 16) == 8)
1305 (void)printf("\n\t");
1306 (void)printf("%2x ", *cp);
1307 }
1308 (void)printf("\ndp:");
1309 cp = &outpack[ICMP_MINLEN];
1310 for (i = 0; i < datalen; ++i, ++cp) {
1311 if ((i % 16) == 8)
1312 (void)printf("\n\t");
1313 (void)printf("%2x ", *cp);
1314 }
1315 break;
1316 }
1317 }
1318 }
1319 } else {
1320 /*
1321 * We've got something other than an ECHOREPLY.
1322 * See if it's a reply to something that we sent.
1323 * We can compare IP destination, protocol,
1324 * and ICMP type and ID.
1325 *
1326 * Only print all the error messages if we are running
1327 * as root to avoid leaking information not normally
1328 * available to those not running as root.
1329 */
1330 #ifndef icmp_data
1331 struct ip *oip = &icp->icmp_ip;
1332 #else
1333 struct ip *oip = (struct ip *)icp->icmp_data;
1334 #endif
1335 struct icmp *oicmp = (struct icmp *)(oip + 1);
1336
1337 if (((options & F_VERBOSE) && uid == 0) ||
1338 (!(options & F_QUIET2) &&
1339 (oip->ip_dst.s_addr == whereto.sin_addr.s_addr) &&
1340 (oip->ip_p == IPPROTO_ICMP) &&
1341 (oicmp->icmp_type == ICMP_ECHO) &&
1342 (oicmp->icmp_id == ident))) {
1343 (void)printf("%d bytes from %s: ", cc,
1344 pr_addr(from->sin_addr));
1345 pr_icmph(icp);
1346 } else
1347 return;
1348 }
1349
1350 /* Display any IP options */
1351 cp = (u_char *)buf + sizeof(struct ip);
1352
1353 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp)
1354 switch (*cp) {
1355 case IPOPT_EOL:
1356 hlen = 0;
1357 break;
1358 case IPOPT_LSRR:
1359 case IPOPT_SSRR:
1360 (void)printf(*cp == IPOPT_LSRR ?
1361 "\nLSRR: " : "\nSSRR: ");
1362 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1;
1363 hlen -= 2;
1364 cp += 2;
1365 if (j >= INADDR_LEN &&
1366 j <= hlen - (int)sizeof(struct ip)) {
1367 for (;;) {
1368 bcopy(++cp, &ina.s_addr, INADDR_LEN);
1369 if (ina.s_addr == 0)
1370 (void)printf("\t0.0.0.0");
1371 else
1372 (void)printf("\t%s",
1373 pr_addr(ina));
1374 hlen -= INADDR_LEN;
1375 cp += INADDR_LEN - 1;
1376 j -= INADDR_LEN;
1377 if (j < INADDR_LEN)
1378 break;
1379 (void)putchar('\n');
1380 }
1381 } else
1382 (void)printf("\t(truncated route)\n");
1383 break;
1384 case IPOPT_RR:
1385 j = cp[IPOPT_OLEN]; /* get length */
1386 i = cp[IPOPT_OFFSET]; /* and pointer */
1387 hlen -= 2;
1388 cp += 2;
1389 if (i > j)
1390 i = j;
1391 i = i - IPOPT_MINOFF + 1;
1392 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) {
1393 old_rrlen = 0;
1394 continue;
1395 }
1396 if (i == old_rrlen
1397 && !bcmp((char *)cp, old_rr, i)
1398 && !(options & F_FLOOD)) {
1399 (void)printf("\t(same route)");
1400 hlen -= i;
1401 cp += i;
1402 break;
1403 }
1404 old_rrlen = i;
1405 bcopy((char *)cp, old_rr, i);
1406 (void)printf("\nRR: ");
1407 if (i >= INADDR_LEN &&
1408 i <= hlen - (int)sizeof(struct ip)) {
1409 for (;;) {
1410 bcopy(++cp, &ina.s_addr, INADDR_LEN);
1411 if (ina.s_addr == 0)
1412 (void)printf("\t0.0.0.0");
1413 else
1414 (void)printf("\t%s",
1415 pr_addr(ina));
1416 hlen -= INADDR_LEN;
1417 cp += INADDR_LEN - 1;
1418 i -= INADDR_LEN;
1419 if (i < INADDR_LEN)
1420 break;
1421 (void)putchar('\n');
1422 }
1423 } else
1424 (void)printf("\t(truncated route)");
1425 break;
1426 case IPOPT_NOP:
1427 (void)printf("\nNOP");
1428 break;
1429 default:
1430 (void)printf("\nunknown option %x", *cp);
1431 break;
1432 }
1433 if (!(options & F_FLOOD)) {
1434 (void)putchar('\n');
1435 (void)fflush(stdout);
1436 }
1437 }
1438
1439 /*
1440 * in_cksum --
1441 * Checksum routine for Internet Protocol family headers (C Version)
1442 */
1443 u_short
1444 in_cksum(u_short *addr, int len)
1445 {
1446 int nleft, sum;
1447 u_short *w;
1448 union {
1449 u_short us;
1450 u_char uc[2];
1451 } last;
1452 u_short answer;
1453
1454 nleft = len;
1455 sum = 0;
1456 w = addr;
1457
1458 /*
1459 * Our algorithm is simple, using a 32 bit accumulator (sum), we add
1460 * sequential 16 bit words to it, and at the end, fold back all the
1461 * carry bits from the top 16 bits into the lower 16 bits.
1462 */
1463 while (nleft > 1) {
1464 sum += *w++;
1465 nleft -= 2;
1466 }
1467
1468 /* mop up an odd byte, if necessary */
1469 if (nleft == 1) {
1470 last.uc[0] = *(u_char *)w;
1471 last.uc[1] = 0;
1472 sum += last.us;
1473 }
1474
1475 /* add back carry outs from top 16 bits to low 16 bits */
1476 sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */
1477 sum += (sum >> 16); /* add carry */
1478 answer = ~sum; /* truncate to 16 bits */
1479 return(answer);
1480 }
1481
1482 /*
1483 * tvsub --
1484 * Subtract 2 timeval structs: out = out - in. Out is assumed to
1485 * be >= in.
1486 */
1487 static void
1488 tvsub(struct timeval *out, const struct timeval *in)
1489 {
1490
1491 if ((out->tv_usec -= in->tv_usec) < 0) {
1492 --out->tv_sec;
1493 out->tv_usec += 1000000;
1494 }
1495 out->tv_sec -= in->tv_sec;
1496 }
1497
1498 /*
1499 * status --
1500 * Print out statistics when SIGINFO is received.
1501 */
1502
1503 static void
1504 status(int sig __unused)
1505 {
1506
1507 siginfo_p = 1;
1508 }
1509
1510 static void
1511 check_status(void)
1512 {
1513
1514 if (siginfo_p) {
1515 siginfo_p = 0;
1516 (void)fprintf(stderr, "\r%ld/%ld packets received (%.1f%%)",
1517 nreceived, ntransmitted,
1518 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0);
1519 if (nreceived && timing)
1520 (void)fprintf(stderr, " %.3f min / %.3f avg / %.3f max",
1521 tmin, tsum / (nreceived + nrepeats), tmax);
1522 (void)fprintf(stderr, "\n");
1523 }
1524 }
1525
1526 /*
1527 * finish --
1528 * Print out statistics, and give up.
1529 */
1530 static void
1531 finish(void)
1532 {
1533
1534 (void)signal(SIGINT, SIG_IGN);
1535 (void)signal(SIGALRM, SIG_IGN);
1536 (void)putchar('\n');
1537 (void)fflush(stdout);
1538 (void)printf("--- %s ping statistics ---\n", hostname);
1539 (void)printf("%ld packets transmitted, ", ntransmitted);
1540 (void)printf("%ld packets received, ", nreceived);
1541 if (nrepeats)
1542 (void)printf("+%ld duplicates, ", nrepeats);
1543 if (ntransmitted) {
1544 if (nreceived > ntransmitted)
1545 (void)printf("-- somebody's printing up packets!");
1546 else
1547 (void)printf("%.1f%% packet loss",
1548 ((ntransmitted - nreceived) * 100.0) /
1549 ntransmitted);
1550 }
1551 if (nrcvtimeout)
1552 (void)printf(", %ld packets out of wait time", nrcvtimeout);
1553 (void)putchar('\n');
1554 if (nreceived && timing) {
1555 double n = nreceived + nrepeats;
1556 double avg = tsum / n;
1557 double vari = tsumsq / n - avg * avg;
1558 (void)printf(
1559 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n",
1560 tmin, avg, tmax, sqrt(vari));
1561 }
1562
1563 if (nreceived)
1564 exit(0);
1565 else
1566 exit(2);
1567 }
1568
1569 #ifdef notdef
1570 static char *ttab[] = {
1571 "Echo Reply", /* ip + seq + udata */
1572 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */
1573 "Source Quench", /* IP */
1574 "Redirect", /* redirect type, gateway, + IP */
1575 "Echo",
1576 "Time Exceeded", /* transit, frag reassem + IP */
1577 "Parameter Problem", /* pointer + IP */
1578 "Timestamp", /* id + seq + three timestamps */
1579 "Timestamp Reply", /* " */
1580 "Info Request", /* id + sq */
1581 "Info Reply" /* " */
1582 };
1583 #endif
1584
1585 /*
1586 * pr_icmph --
1587 * Print a descriptive string about an ICMP header.
1588 */
1589 static void
1590 pr_icmph(struct icmp *icp)
1591 {
1592
1593 switch(icp->icmp_type) {
1594 case ICMP_ECHOREPLY:
1595 (void)printf("Echo Reply\n");
1596 /* XXX ID + Seq + Data */
1597 break;
1598 case ICMP_UNREACH:
1599 switch(icp->icmp_code) {
1600 case ICMP_UNREACH_NET:
1601 (void)printf("Destination Net Unreachable\n");
1602 break;
1603 case ICMP_UNREACH_HOST:
1604 (void)printf("Destination Host Unreachable\n");
1605 break;
1606 case ICMP_UNREACH_PROTOCOL:
1607 (void)printf("Destination Protocol Unreachable\n");
1608 break;
1609 case ICMP_UNREACH_PORT:
1610 (void)printf("Destination Port Unreachable\n");
1611 break;
1612 case ICMP_UNREACH_NEEDFRAG:
1613 (void)printf("frag needed and DF set (MTU %d)\n",
1614 ntohs(icp->icmp_nextmtu));
1615 break;
1616 case ICMP_UNREACH_SRCFAIL:
1617 (void)printf("Source Route Failed\n");
1618 break;
1619 case ICMP_UNREACH_FILTER_PROHIB:
1620 (void)printf("Communication prohibited by filter\n");
1621 break;
1622 default:
1623 (void)printf("Dest Unreachable, Bad Code: %d\n",
1624 icp->icmp_code);
1625 break;
1626 }
1627 /* Print returned IP header information */
1628 #ifndef icmp_data
1629 pr_retip(&icp->icmp_ip);
1630 #else
1631 pr_retip((struct ip *)icp->icmp_data);
1632 #endif
1633 break;
1634 case ICMP_SOURCEQUENCH:
1635 (void)printf("Source Quench\n");
1636 #ifndef icmp_data
1637 pr_retip(&icp->icmp_ip);
1638 #else
1639 pr_retip((struct ip *)icp->icmp_data);
1640 #endif
1641 break;
1642 case ICMP_REDIRECT:
1643 switch(icp->icmp_code) {
1644 case ICMP_REDIRECT_NET:
1645 (void)printf("Redirect Network");
1646 break;
1647 case ICMP_REDIRECT_HOST:
1648 (void)printf("Redirect Host");
1649 break;
1650 case ICMP_REDIRECT_TOSNET:
1651 (void)printf("Redirect Type of Service and Network");
1652 break;
1653 case ICMP_REDIRECT_TOSHOST:
1654 (void)printf("Redirect Type of Service and Host");
1655 break;
1656 default:
1657 (void)printf("Redirect, Bad Code: %d", icp->icmp_code);
1658 break;
1659 }
1660 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr));
1661 #ifndef icmp_data
1662 pr_retip(&icp->icmp_ip);
1663 #else
1664 pr_retip((struct ip *)icp->icmp_data);
1665 #endif
1666 break;
1667 case ICMP_ECHO:
1668 (void)printf("Echo Request\n");
1669 /* XXX ID + Seq + Data */
1670 break;
1671 case ICMP_TIMXCEED:
1672 switch(icp->icmp_code) {
1673 case ICMP_TIMXCEED_INTRANS:
1674 (void)printf("Time to live exceeded\n");
1675 break;
1676 case ICMP_TIMXCEED_REASS:
1677 (void)printf("Frag reassembly time exceeded\n");
1678 break;
1679 default:
1680 (void)printf("Time exceeded, Bad Code: %d\n",
1681 icp->icmp_code);
1682 break;
1683 }
1684 #ifndef icmp_data
1685 pr_retip(&icp->icmp_ip);
1686 #else
1687 pr_retip((struct ip *)icp->icmp_data);
1688 #endif
1689 break;
1690 case ICMP_PARAMPROB:
1691 (void)printf("Parameter problem: pointer = 0x%02x\n",
1692 icp->icmp_hun.ih_pptr);
1693 #ifndef icmp_data
1694 pr_retip(&icp->icmp_ip);
1695 #else
1696 pr_retip((struct ip *)icp->icmp_data);
1697 #endif
1698 break;
1699 case ICMP_TSTAMP:
1700 (void)printf("Timestamp\n");
1701 /* XXX ID + Seq + 3 timestamps */
1702 break;
1703 case ICMP_TSTAMPREPLY:
1704 (void)printf("Timestamp Reply\n");
1705 /* XXX ID + Seq + 3 timestamps */
1706 break;
1707 case ICMP_IREQ:
1708 (void)printf("Information Request\n");
1709 /* XXX ID + Seq */
1710 break;
1711 case ICMP_IREQREPLY:
1712 (void)printf("Information Reply\n");
1713 /* XXX ID + Seq */
1714 break;
1715 case ICMP_MASKREQ:
1716 (void)printf("Address Mask Request\n");
1717 break;
1718 case ICMP_MASKREPLY:
1719 (void)printf("Address Mask Reply\n");
1720 break;
1721 case ICMP_ROUTERADVERT:
1722 (void)printf("Router Advertisement\n");
1723 break;
1724 case ICMP_ROUTERSOLICIT:
1725 (void)printf("Router Solicitation\n");
1726 break;
1727 default:
1728 (void)printf("Bad ICMP type: %d\n", icp->icmp_type);
1729 }
1730 }
1731
1732 /*
1733 * pr_iph --
1734 * Print an IP header with options.
1735 */
1736 static void
1737 pr_iph(struct ip *ip)
1738 {
1739 u_char *cp;
1740 int hlen;
1741
1742 hlen = ip->ip_hl << 2;
1743 cp = (u_char *)ip + 20; /* point to options */
1744
1745 (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n");
1746 (void)printf(" %1x %1x %02x %04x %04x",
1747 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len),
1748 ntohs(ip->ip_id));
1749 (void)printf(" %1lx %04lx",
1750 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13,
1751 (u_long) ntohl(ip->ip_off) & 0x1fff);
1752 (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p,
1753 ntohs(ip->ip_sum));
1754 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr));
1755 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr));
1756 /* dump any option bytes */
1757 while (hlen-- > 20) {
1758 (void)printf("%02x", *cp++);
1759 }
1760 (void)putchar('\n');
1761 }
1762
1763 /*
1764 * pr_addr --
1765 * Return an ascii host address as a dotted quad and optionally with
1766 * a hostname.
1767 */
1768 static char *
1769 pr_addr(struct in_addr ina)
1770 {
1771 struct hostent *hp;
1772 static char buf[16 + 3 + MAXHOSTNAMELEN];
1773
1774 if ((options & F_NUMERIC) ||
1775 !(hp = gethostbyaddr((char *)&ina, 4, AF_INET)))
1776 return inet_ntoa(ina);
1777 else
1778 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name,
1779 inet_ntoa(ina));
1780 return(buf);
1781 }
1782
1783 /*
1784 * pr_retip --
1785 * Dump some info on a returned (via ICMP) IP packet.
1786 */
1787 static void
1788 pr_retip(struct ip *ip)
1789 {
1790 u_char *cp;
1791 int hlen;
1792
1793 pr_iph(ip);
1794 hlen = ip->ip_hl << 2;
1795 cp = (u_char *)ip + hlen;
1796
1797 if (ip->ip_p == 6)
1798 (void)printf("TCP: from port %u, to port %u (decimal)\n",
1799 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
1800 else if (ip->ip_p == 17)
1801 (void)printf("UDP: from port %u, to port %u (decimal)\n",
1802 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
1803 }
1804
1805 static char *
1806 pr_ntime(n_time timestamp)
1807 {
1808 static char buf[10];
1809 int hour, min, sec;
1810
1811 sec = ntohl(timestamp) / 1000;
1812 hour = sec / 60 / 60;
1813 min = (sec % (60 * 60)) / 60;
1814 sec = (sec % (60 * 60)) % 60;
1815
1816 (void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec);
1817
1818 return (buf);
1819 }
1820
1821 static void
1822 fill(char *bp, char *patp)
1823 {
1824 char *cp;
1825 int pat[16];
1826 u_int ii, jj, kk;
1827
1828 for (cp = patp; *cp; cp++) {
1829 if (!isxdigit(*cp))
1830 errx(EX_USAGE,
1831 "patterns must be specified as hex digits");
1832
1833 }
1834 ii = sscanf(patp,
1835 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
1836 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
1837 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
1838 &pat[13], &pat[14], &pat[15]);
1839
1840 if (ii > 0)
1841 for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii)
1842 for (jj = 0; jj < ii; ++jj)
1843 bp[jj + kk] = pat[jj];
1844 if (!(options & F_QUIET)) {
1845 (void)printf("PATTERN: 0x");
1846 for (jj = 0; jj < ii; ++jj)
1847 (void)printf("%02x", bp[jj] & 0xFF);
1848 (void)printf("\n");
1849 }
1850 }
1851
1852 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
1853 #define SECOPT " [-P policy]"
1854 #else
1855 #define SECOPT ""
1856 #endif
1857 static void
1858 usage(void)
1859 {
1860
1861 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1862 "usage: ping [-AaDdfnoQqRrv] [-b boundif] [-c count] [-G sweepmaxsize] [-g sweepminsize]",
1863 " [-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]",
1864 " " SECOPT " [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]",
1865 " [-W waittime] [-z tos] host",
1866 " ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]",
1867 " [-M mask | time] [-m ttl]" SECOPT " [-p pattern] [-S src_addr]",
1868 " [-s packetsize] [-T ttl] [-t timeout] [-W waittime]",
1869 " [-z tos] mcast-group");
1870 exit(EX_USAGE);
1871 }
mirror of network_cmds