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[apple/network_cmds.git] / ping.tproj / ping.c
1 /*
2 * Copyright (c) 2008 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 #ifndef __APPLE__
73 __FBSDID("$FreeBSD: src/sbin/ping/ping.c,v 1.112 2007/07/01 12:08:06 gnn Exp $");
74 #endif
75
76 /*
77 * P I N G . C
78 *
79 * Using the Internet Control Message Protocol (ICMP) "ECHO" facility,
80 * measure round-trip-delays and packet loss across network paths.
81 *
82 * Author -
83 * Mike Muuss
84 * U. S. Army Ballistic Research Laboratory
85 * December, 1983
86 *
87 * Status -
88 * Public Domain. Distribution Unlimited.
89 * Bugs -
90 * More statistics could always be gathered.
91 * This program has to run SUID to ROOT to access the ICMP socket.
92 */
93
94 #include <sys/param.h> /* NB: we rely on this for <sys/types.h> */
95 #include <sys/socket.h>
96 #include <sys/sysctl.h>
97 #include <sys/time.h>
98 #include <sys/uio.h>
99
100 #include <netinet/in.h>
101 #include <netinet/in_systm.h>
102 #include <netinet/ip.h>
103 #include <netinet/ip_icmp.h>
104 #include <netinet/ip_var.h>
105 #include <arpa/inet.h>
106 #include <net/if.h>
107
108 #ifdef IPSEC
109 #include <netinet6/ipsec.h>
110 #endif /*IPSEC*/
111
112 #include <ctype.h>
113 #include <err.h>
114 #include <errno.h>
115 #include <math.h>
116 #include <netdb.h>
117 #include <signal.h>
118 #include <stdio.h>
119 #include <stdlib.h>
120 #include <string.h>
121 #include <sysexits.h>
122 #include <unistd.h>
123 #include <ifaddrs.h>
124
125 #define INADDR_LEN ((int)sizeof(in_addr_t))
126 #define TIMEVAL_LEN ((int)sizeof(struct tv32))
127 #define MASK_LEN (ICMP_MASKLEN - ICMP_MINLEN)
128 #define TS_LEN (ICMP_TSLEN - ICMP_MINLEN)
129 #define DEFDATALEN 56 /* default data length */
130 #define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */
131 /* runs out of buffer space */
132 #define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN)
133 #define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN)
134 #define MAXWAIT 10000 /* max ms to wait for response */
135 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */
136 #define MAXTOS 255
137
138 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
139 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
140 #define SET(bit) (A(bit) |= B(bit))
141 #define CLR(bit) (A(bit) &= (~B(bit)))
142 #define TST(bit) (A(bit) & B(bit))
143
144 struct tv32 {
145 u_int32_t tv32_sec;
146 u_int32_t tv32_usec;
147 };
148
149 /* various options */
150 int options;
151 #define F_FLOOD 0x0001
152 #define F_INTERVAL 0x0002
153 #define F_NUMERIC 0x0004
154 #define F_PINGFILLED 0x0008
155 #define F_QUIET 0x0010
156 #define F_RROUTE 0x0020
157 #define F_SO_DEBUG 0x0040
158 #define F_SO_DONTROUTE 0x0080
159 #define F_VERBOSE 0x0100
160 #define F_QUIET2 0x0200
161 #define F_NOLOOP 0x0400
162 #define F_MTTL 0x0800
163 #define F_MIF 0x1000
164 #define F_AUDIBLE 0x2000
165 #ifdef IPSEC
166 #ifdef IPSEC_POLICY_IPSEC
167 #define F_POLICY 0x4000
168 #endif /*IPSEC_POLICY_IPSEC*/
169 #endif /*IPSEC*/
170 #define F_TTL 0x8000
171 #define F_MISSED 0x10000
172 #define F_ONCE 0x20000
173 #define F_HDRINCL 0x40000
174 #define F_MASK 0x80000
175 #define F_TIME 0x100000
176 #define F_SWEEP 0x200000
177 #define F_WAITTIME 0x400000
178
179 /*
180 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
181 * number of received sequence numbers we can keep track of. Change 128
182 * to 8192 for complete accuracy...
183 */
184 #define MAX_DUP_CHK (8 * 128)
185 int mx_dup_ck = MAX_DUP_CHK;
186 char rcvd_tbl[MAX_DUP_CHK / 8];
187
188 struct sockaddr_in whereto; /* who to ping */
189 int datalen = DEFDATALEN;
190 int maxpayload;
191 int s; /* socket file descriptor */
192 u_char outpackhdr[IP_MAXPACKET], *outpack;
193 char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */
194 char BSPACE = '\b'; /* characters written for flood */
195 char DOT = '.';
196 char *hostname;
197 char *shostname;
198 int ident; /* process id to identify our packets */
199 int uid; /* cached uid for micro-optimization */
200 u_char icmp_type = ICMP_ECHO;
201 u_char icmp_type_rsp = ICMP_ECHOREPLY;
202 int phdr_len = 0;
203 int send_len;
204 char *boundif;
205 unsigned int ifscope;
206 #if defined(IP_FORCE_OUT_IFP) && TARGET_OS_EMBEDDED
207 char boundifname[IFNAMSIZ];
208 #endif /* IP_FORCE_OUT_IFP */
209 int nocell;
210 int how_traffic_class = 0;
211 int traffic_class = -1;
212 int no_dup = 0;
213
214 /* counters */
215 long nmissedmax; /* max value of ntransmitted - nreceived - 1 */
216 long npackets; /* max packets to transmit */
217 long nreceived; /* # of packets we got back */
218 long nrepeats; /* number of duplicates */
219 long ntransmitted; /* sequence # for outbound packets = #sent */
220 long snpackets; /* max packets to transmit in one sweep */
221 long snreceived; /* # of packets we got back in this sweep */
222 long sntransmitted; /* # of packets we sent in this sweep */
223 int sweepmax; /* max value of payload in sweep */
224 int sweepmin = 0; /* start value of payload in sweep */
225 int sweepincr = 1; /* payload increment in sweep */
226 int interval = 1000; /* interval between packets, ms */
227 int waittime = MAXWAIT; /* timeout for each packet */
228 long nrcvtimeout = 0; /* # of packets we got back after waittime */
229
230 /* timing */
231 int timing; /* flag to do timing */
232 double tmin = 999999999.0; /* minimum round trip time */
233 double tmax = 0.0; /* maximum round trip time */
234 double tsum = 0.0; /* sum of all times, for doing average */
235 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */
236
237 volatile sig_atomic_t finish_up; /* nonzero if we've been told to finish up */
238 volatile sig_atomic_t siginfo_p;
239
240 static void fill(char *, char *);
241 static u_short in_cksum(u_short *, int);
242 static void check_status(void);
243 static void finish(void) __dead2;
244 static void pinger(void);
245 static char *pr_addr(struct in_addr);
246 static char *pr_ntime(n_time);
247 static void pr_icmph(struct icmp *);
248 static void pr_iph(struct ip *);
249 static void pr_pack(char *, int, struct sockaddr_in *, struct timeval *, int);
250 static void pr_retip(struct ip *);
251 static void status(int);
252 static void stopit(int);
253 static void tvsub(struct timeval *, struct timeval *);
254 static void usage(void) __dead2;
255
256 int
257 main(argc, argv)
258 int argc;
259 char *const *argv;
260 {
261 struct sockaddr_in from, sock_in;
262 struct in_addr ifaddr;
263 struct timeval last, intvl;
264 struct iovec iov;
265 struct ip *ip;
266 struct msghdr msg;
267 struct sigaction si_sa;
268 size_t sz;
269 u_char *datap, packet[IP_MAXPACKET];
270 char *ep, *source, *target, *payload;
271 struct hostent *hp;
272 #ifdef IPSEC_POLICY_IPSEC
273 char *policy_in, *policy_out;
274 #endif
275 struct sockaddr_in *to;
276 double t;
277 u_long alarmtimeout, ultmp;
278 int almost_done, ch, df, hold, i, icmp_len, mib[4], preload, sockerrno,
279 tos, ttl;
280 char ctrl[CMSG_SPACE(sizeof(struct timeval)) + CMSG_SPACE(sizeof(int))];
281 char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN];
282 #ifdef IP_OPTIONS
283 char rspace[MAX_IPOPTLEN]; /* record route space */
284 #endif
285 unsigned char loop, mttl;
286
287 payload = source = NULL;
288 #ifdef IPSEC_POLICY_IPSEC
289 policy_in = policy_out = NULL;
290 #endif
291
292 /*
293 * Do the stuff that we need root priv's for *first*, and
294 * then drop our setuid bit. Save error reporting for
295 * after arg parsing.
296 */
297 if (getuid())
298 s = socket(AF_INET, SOCK_DGRAM, IPPROTO_ICMP);
299 else
300 s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
301 sockerrno = errno;
302
303 setuid(getuid());
304 uid = getuid();
305
306 alarmtimeout = df = preload = tos = 0;
307
308 outpack = outpackhdr + sizeof(struct ip);
309 while ((ch = getopt(argc, argv,
310 "Aab:Cc:DdfG:g:h:I:i:k:Ll:M:m:nop:QqRrS:s:T:t:vW:z:"
311 #ifdef IPSEC
312 #ifdef IPSEC_POLICY_IPSEC
313 "P:"
314 #endif /*IPSEC_POLICY_IPSEC*/
315 #endif /*IPSEC*/
316 #if defined(IP_FORCE_OUT_IFP) && TARGET_OS_EMBEDDED
317 "B:"
318 #endif /* IP_FORCE_OUT_IFP */
319 )) != -1)
320 {
321 switch(ch) {
322 case 'A':
323 options |= F_MISSED;
324 break;
325 case 'a':
326 options |= F_AUDIBLE;
327 break;
328 #if defined(IP_FORCE_OUT_IFP) && TARGET_OS_EMBEDDED
329 case 'B':
330 (void) snprintf(boundifname, sizeof (boundifname),
331 "%s", optarg);
332 break;
333 #endif /* IP_FORCE_OUT_IFP */
334 case 'b':
335 boundif = optarg;
336 break;
337 case 'C':
338 nocell++;
339 break;
340 case 'c':
341 ultmp = strtoul(optarg, &ep, 0);
342 if (*ep || ep == optarg || ultmp > LONG_MAX || !ultmp)
343 errx(EX_USAGE,
344 "invalid count of packets to transmit: `%s'",
345 optarg);
346 npackets = ultmp;
347 break;
348 case 'D':
349 options |= F_HDRINCL;
350 df = 1;
351 break;
352 case 'd':
353 options |= F_SO_DEBUG;
354 break;
355 case 'f':
356 if (uid) {
357 errno = EPERM;
358 err(EX_NOPERM, "-f flag");
359 }
360 options |= F_FLOOD;
361 setbuf(stdout, (char *)NULL);
362 break;
363 case 'G': /* Maximum packet size for ping sweep */
364 ultmp = strtoul(optarg, &ep, 0);
365 if (*ep || ep == optarg)
366 errx(EX_USAGE, "invalid packet size: `%s'",
367 optarg);
368 #ifndef __APPLE__
369 if (uid != 0 && ultmp > DEFDATALEN) {
370 errno = EPERM;
371 err(EX_NOPERM,
372 "packet size too large: %lu > %u",
373 ultmp, DEFDATALEN);
374 }
375 #endif /* __APPLE__ */
376 options |= F_SWEEP;
377 sweepmax = ultmp;
378 break;
379 case 'g': /* Minimum packet size for ping sweep */
380 ultmp = strtoul(optarg, &ep, 0);
381 if (*ep || ep == optarg)
382 errx(EX_USAGE, "invalid packet size: `%s'",
383 optarg);
384 #ifndef __APPLE__
385 if (uid != 0 && ultmp > DEFDATALEN) {
386 errno = EPERM;
387 err(EX_NOPERM,
388 "packet size too large: %lu > %u",
389 ultmp, DEFDATALEN);
390 }
391 #endif /* __APPLE__ */
392 options |= F_SWEEP;
393 sweepmin = ultmp;
394 break;
395 case 'h': /* Packet size increment for ping sweep */
396 ultmp = strtoul(optarg, &ep, 0);
397 if (*ep || ep == optarg || ultmp < 1)
398 errx(EX_USAGE, "invalid increment size: `%s'",
399 optarg);
400 #ifndef __APPLE__
401 if (uid != 0 && ultmp > DEFDATALEN) {
402 errno = EPERM;
403 err(EX_NOPERM,
404 "packet size too large: %lu > %u",
405 ultmp, DEFDATALEN);
406 }
407 #endif /* __APPLE__ */
408 options |= F_SWEEP;
409 sweepincr = ultmp;
410 break;
411 case 'I': /* multicast interface */
412 if (inet_aton(optarg, &ifaddr) == 0)
413 errx(EX_USAGE,
414 "invalid multicast interface: `%s'",
415 optarg);
416 options |= F_MIF;
417 break;
418 case 'i': /* wait between sending packets */
419 t = strtod(optarg, &ep) * 1000.0;
420 if (*ep || ep == optarg || t > (double)INT_MAX)
421 errx(EX_USAGE, "invalid timing interval: `%s'",
422 optarg);
423 options |= F_INTERVAL;
424 interval = (int)t;
425 if (uid && interval < 1000) {
426 errno = EPERM;
427 err(EX_NOPERM, "-i interval too short");
428 }
429 break;
430 case 'k':
431 how_traffic_class++;
432 traffic_class = atoi(optarg);
433 break;
434 case 'L':
435 options |= F_NOLOOP;
436 loop = 0;
437 break;
438 case 'l':
439 ultmp = strtoul(optarg, &ep, 0);
440 if (*ep || ep == optarg || ultmp > INT_MAX)
441 errx(EX_USAGE,
442 "invalid preload value: `%s'", optarg);
443 if (uid) {
444 errno = EPERM;
445 err(EX_NOPERM, "-l flag");
446 }
447 preload = ultmp;
448 break;
449 case 'M':
450 switch(optarg[0]) {
451 case 'M':
452 case 'm':
453 options |= F_MASK;
454 break;
455 case 'T':
456 case 't':
457 options |= F_TIME;
458 break;
459 default:
460 errx(EX_USAGE, "invalid message: `%c'", optarg[0]);
461 break;
462 }
463 break;
464 case 'm': /* TTL */
465 ultmp = strtoul(optarg, &ep, 0);
466 if (*ep || ep == optarg || ultmp > MAXTTL)
467 errx(EX_USAGE, "invalid TTL: `%s'", optarg);
468 ttl = ultmp;
469 options |= F_TTL;
470 break;
471 case 'n':
472 options |= F_NUMERIC;
473 break;
474 case 'o':
475 options |= F_ONCE;
476 break;
477 #ifdef IPSEC
478 #ifdef IPSEC_POLICY_IPSEC
479 case 'P':
480 options |= F_POLICY;
481 if (!strncmp("in", optarg, 2))
482 policy_in = strdup(optarg);
483 else if (!strncmp("out", optarg, 3))
484 policy_out = strdup(optarg);
485 else
486 errx(1, "invalid security policy");
487 break;
488 #endif /*IPSEC_POLICY_IPSEC*/
489 #endif /*IPSEC*/
490 case 'p': /* fill buffer with user pattern */
491 options |= F_PINGFILLED;
492 payload = optarg;
493 break;
494 case 'Q':
495 options |= F_QUIET2;
496 break;
497 case 'q':
498 options |= F_QUIET;
499 break;
500 case 'R':
501 options |= F_RROUTE;
502 break;
503 case 'r':
504 options |= F_SO_DONTROUTE;
505 break;
506 case 'S':
507 source = optarg;
508 break;
509 case 's': /* size of packet to send */
510 ultmp = strtoul(optarg, &ep, 0);
511 if (*ep || ep == optarg)
512 errx(EX_USAGE, "invalid packet size: `%s'",
513 optarg);
514 #ifndef __APPLE__
515 if (uid != 0 && ultmp > DEFDATALEN) {
516 errno = EPERM;
517 err(EX_NOPERM,
518 "packet size too large: %lu > %u",
519 ultmp, DEFDATALEN);
520 }
521 #endif /* __APPLE__ */
522 datalen = ultmp;
523 break;
524 case 'T': /* multicast TTL */
525 ultmp = strtoul(optarg, &ep, 0);
526 if (*ep || ep == optarg || ultmp > MAXTTL)
527 errx(EX_USAGE, "invalid multicast TTL: `%s'",
528 optarg);
529 mttl = ultmp;
530 options |= F_MTTL;
531 break;
532 case 't':
533 alarmtimeout = strtoul(optarg, &ep, 0);
534 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
535 errx(EX_USAGE, "invalid timeout: `%s'",
536 optarg);
537 if (alarmtimeout > MAXALARM)
538 errx(EX_USAGE, "invalid timeout: `%s' > %d",
539 optarg, MAXALARM);
540 alarm((unsigned int)alarmtimeout);
541 break;
542 case 'v':
543 options |= F_VERBOSE;
544 break;
545 case 'W': /* wait ms for answer */
546 t = strtod(optarg, &ep);
547 if (*ep || ep == optarg || t > (double)INT_MAX)
548 errx(EX_USAGE, "invalid timing interval: `%s'",
549 optarg);
550 options |= F_WAITTIME;
551 waittime = (int)t;
552 break;
553 case 'z':
554 options |= F_HDRINCL;
555 ultmp = strtoul(optarg, &ep, 0);
556 if (*ep || ep == optarg || ultmp > MAXTOS)
557 errx(EX_USAGE, "invalid TOS: `%s'", optarg);
558 tos = ultmp;
559 break;
560 default:
561 usage();
562 }
563 }
564
565 if (boundif != NULL && (ifscope = if_nametoindex(boundif)) == 0)
566 errx(1, "bad interface name");
567
568 if (argc - optind != 1)
569 usage();
570 target = argv[optind];
571
572 switch (options & (F_MASK|F_TIME)) {
573 case 0: break;
574 case F_MASK:
575 icmp_type = ICMP_MASKREQ;
576 icmp_type_rsp = ICMP_MASKREPLY;
577 phdr_len = MASK_LEN;
578 if (!(options & F_QUIET))
579 (void)printf("ICMP_MASKREQ\n");
580 break;
581 case F_TIME:
582 icmp_type = ICMP_TSTAMP;
583 icmp_type_rsp = ICMP_TSTAMPREPLY;
584 phdr_len = TS_LEN;
585 if (!(options & F_QUIET))
586 (void)printf("ICMP_TSTAMP\n");
587 break;
588 default:
589 errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive.");
590 break;
591 }
592 icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len;
593 if (options & F_RROUTE)
594 icmp_len += MAX_IPOPTLEN;
595 maxpayload = IP_MAXPACKET - icmp_len;
596 if (datalen > maxpayload)
597 errx(EX_USAGE, "packet size too large: %d > %d", datalen,
598 maxpayload);
599 send_len = icmp_len + datalen;
600 datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN];
601 if (options & F_PINGFILLED) {
602 fill((char *)datap, payload);
603 }
604 if (source) {
605 bzero((char *)&sock_in, sizeof(sock_in));
606 sock_in.sin_family = AF_INET;
607 if (inet_aton(source, &sock_in.sin_addr) != 0) {
608 shostname = source;
609 } else {
610 hp = gethostbyname2(source, AF_INET);
611 if (!hp)
612 errx(EX_NOHOST, "cannot resolve %s: %s",
613 source, hstrerror(h_errno));
614
615 sock_in.sin_len = sizeof sock_in;
616 if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) ||
617 hp->h_length < 0)
618 errx(1, "gethostbyname2: illegal address");
619 memcpy(&sock_in.sin_addr, hp->h_addr_list[0],
620 sizeof(sock_in.sin_addr));
621 (void)strncpy(snamebuf, hp->h_name,
622 sizeof(snamebuf) - 1);
623 snamebuf[sizeof(snamebuf) - 1] = '\0';
624 shostname = snamebuf;
625 }
626 if (bind(s, (struct sockaddr *)&sock_in, sizeof sock_in) == -1)
627 err(1, "bind");
628 }
629
630 bzero(&whereto, sizeof(whereto));
631 to = &whereto;
632 to->sin_family = AF_INET;
633 to->sin_len = sizeof *to;
634 if (inet_aton(target, &to->sin_addr) != 0) {
635 hostname = target;
636 } else {
637 hp = gethostbyname2(target, AF_INET);
638 if (!hp)
639 errx(EX_NOHOST, "cannot resolve %s: %s",
640 target, hstrerror(h_errno));
641
642 if ((unsigned)hp->h_length > sizeof(to->sin_addr))
643 errx(1, "gethostbyname2 returned an illegal address");
644 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr);
645 (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1);
646 hnamebuf[sizeof(hnamebuf) - 1] = '\0';
647 hostname = hnamebuf;
648 }
649
650 do {
651 struct ifaddrs *ifa_list, *ifa;
652
653 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr)) || whereto.sin_addr.s_addr == INADDR_BROADCAST) {
654 no_dup = 1;
655 break;
656 }
657
658 if (getifaddrs(&ifa_list) == -1)
659 break;
660 for (ifa = ifa_list; ifa; ifa = ifa->ifa_next) {
661 if (ifa->ifa_addr->sa_family != AF_INET)
662 continue;
663 if ((ifa->ifa_flags & IFF_BROADCAST) == 0 || ifa->ifa_broadaddr == NULL)
664 continue;
665 if (whereto.sin_addr.s_addr != ((struct sockaddr_in*)ifa->ifa_broadaddr)->sin_addr.s_addr)
666 continue;
667 no_dup = 1;
668 break;
669 }
670
671 freeifaddrs(ifa_list);
672 } while (0);
673
674 if (options & F_FLOOD && options & F_INTERVAL)
675 errx(EX_USAGE, "-f and -i: incompatible options");
676
677 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
678 errx(EX_USAGE,
679 "-f flag cannot be used with multicast destination");
680 if (options & (F_MIF | F_NOLOOP | F_MTTL)
681 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
682 errx(EX_USAGE,
683 "-I, -L, -T flags cannot be used with unicast destination");
684
685 if (datalen >= TIMEVAL_LEN) /* can we time transfer */
686 timing = 1;
687
688 if (!(options & F_PINGFILLED))
689 for (i = TIMEVAL_LEN; i < datalen; ++i)
690 *datap++ = i;
691
692 ident = getpid() & 0xFFFF;
693
694 if (s < 0) {
695 errno = sockerrno;
696 err(EX_OSERR, "socket");
697 }
698 hold = 1;
699 if (ifscope != 0) {
700 if (setsockopt(s, IPPROTO_IP, IP_BOUND_IF,
701 (char *)&ifscope, sizeof (ifscope)) != 0)
702 err(EX_OSERR, "setsockopt(IP_BOUND_IF)");
703 }
704 #if defined(IP_FORCE_OUT_IFP) && TARGET_OS_EMBEDDED
705 else if (boundifname[0] != 0) {
706 if (setsockopt(s, IPPROTO_IP, IP_FORCE_OUT_IFP, boundifname,
707 sizeof (boundifname)) != 0)
708 err(EX_OSERR, "setsockopt(IP_FORCE_OUT_IFP)");
709 }
710 #endif /* IP_FORCE_OUT_IFP */
711 if (nocell) {
712 if (setsockopt(s, IPPROTO_IP, IP_NO_IFT_CELLULAR,
713 (char *)&nocell, sizeof (nocell)) != 0)
714 err(EX_OSERR, "setsockopt(IP_NO_IFT_CELLULAR)");
715 }
716 if (options & F_SO_DEBUG)
717 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
718 sizeof(hold));
719 if (options & F_SO_DONTROUTE)
720 (void)setsockopt(s, SOL_SOCKET, SO_DONTROUTE, (char *)&hold,
721 sizeof(hold));
722 if (how_traffic_class == 1 && traffic_class > 0) {
723 (void)setsockopt(s, SOL_SOCKET, SO_TRAFFIC_CLASS, (void *)&traffic_class,
724 sizeof(traffic_class));
725 }
726 if (how_traffic_class > 0) {
727 int on = 1;
728 (void)setsockopt(s, SOL_SOCKET, SO_RECV_TRAFFIC_CLASS, (void *)&on,
729 sizeof(on));
730 }
731 #ifdef IPSEC
732 #ifdef IPSEC_POLICY_IPSEC
733 if (options & F_POLICY) {
734 char *buf;
735 if (policy_in != NULL) {
736 buf = ipsec_set_policy(policy_in, strlen(policy_in));
737 if (buf == NULL)
738 errx(EX_CONFIG, "%s", ipsec_strerror());
739 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY,
740 buf, ipsec_get_policylen(buf)) < 0)
741 err(EX_CONFIG,
742 "ipsec policy cannot be configured");
743 free(buf);
744 }
745
746 if (policy_out != NULL) {
747 buf = ipsec_set_policy(policy_out, strlen(policy_out));
748 if (buf == NULL)
749 errx(EX_CONFIG, "%s", ipsec_strerror());
750 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY,
751 buf, ipsec_get_policylen(buf)) < 0)
752 err(EX_CONFIG,
753 "ipsec policy cannot be configured");
754 free(buf);
755 }
756 }
757 #endif /*IPSEC_POLICY_IPSEC*/
758 #endif /*IPSEC*/
759
760 if (options & F_HDRINCL) {
761 ip = (struct ip*)outpackhdr;
762 if (!(options & (F_TTL | F_MTTL))) {
763 mib[0] = CTL_NET;
764 mib[1] = PF_INET;
765 mib[2] = IPPROTO_IP;
766 mib[3] = IPCTL_DEFTTL;
767 sz = sizeof(ttl);
768 if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1)
769 err(1, "sysctl(net.inet.ip.ttl)");
770 }
771 setsockopt(s, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold));
772 ip->ip_v = IPVERSION;
773 ip->ip_hl = sizeof(struct ip) >> 2;
774 ip->ip_tos = tos;
775 ip->ip_id = 0;
776 ip->ip_off = df ? IP_DF : 0;
777 ip->ip_ttl = ttl;
778 ip->ip_p = IPPROTO_ICMP;
779 ip->ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY;
780 ip->ip_dst = to->sin_addr;
781 }
782 /* record route option */
783 if (options & F_RROUTE) {
784 #ifdef IP_OPTIONS
785 bzero(rspace, sizeof(rspace));
786 rspace[IPOPT_OPTVAL] = IPOPT_RR;
787 rspace[IPOPT_OLEN] = sizeof(rspace) - 1;
788 rspace[IPOPT_OFFSET] = IPOPT_MINOFF;
789 rspace[sizeof(rspace) - 1] = IPOPT_EOL;
790 if (setsockopt(s, IPPROTO_IP, IP_OPTIONS, rspace,
791 sizeof(rspace)) < 0)
792 err(EX_OSERR, "setsockopt IP_OPTIONS");
793 #else
794 errx(EX_UNAVAILABLE,
795 "record route not available in this implementation");
796 #endif /* IP_OPTIONS */
797 }
798
799 if (options & F_TTL) {
800 if (setsockopt(s, IPPROTO_IP, IP_TTL, &ttl,
801 sizeof(ttl)) < 0) {
802 err(EX_OSERR, "setsockopt IP_TTL");
803 }
804 }
805 if (options & F_NOLOOP) {
806 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &loop,
807 sizeof(loop)) < 0) {
808 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP");
809 }
810 }
811 if (options & F_MTTL) {
812 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &mttl,
813 sizeof(mttl)) < 0) {
814 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL");
815 }
816 }
817 if (options & F_MIF) {
818 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr,
819 sizeof(ifaddr)) < 0) {
820 err(EX_OSERR, "setsockopt IP_MULTICAST_IF");
821 }
822 }
823 #ifdef SO_TIMESTAMP
824 { int on = 1;
825 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)) < 0)
826 err(EX_OSERR, "setsockopt SO_TIMESTAMP");
827 }
828 #endif
829 if (sweepmax) {
830 if (sweepmin >= sweepmax)
831 errx(EX_USAGE, "Maximum packet size must be greater than the minimum packet size");
832
833 if (datalen != DEFDATALEN)
834 errx(EX_USAGE, "Packet size and ping sweep are mutually exclusive");
835
836 if (npackets > 0) {
837 snpackets = npackets;
838 npackets = 0;
839 } else
840 snpackets = 1;
841 datalen = sweepmin;
842 send_len = icmp_len + sweepmin;
843 }
844 if (options & F_SWEEP && !sweepmax)
845 errx(EX_USAGE, "Maximum sweep size must be specified");
846
847 /*
848 * When pinging the broadcast address, you can get a lot of answers.
849 * Doing something so evil is useful if you are trying to stress the
850 * ethernet, or just want to fill the arp cache to get some stuff for
851 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast
852 * or multicast pings if they wish.
853 */
854
855 /*
856 * XXX receive buffer needs undetermined space for mbuf overhead
857 * as well.
858 */
859 hold = IP_MAXPACKET + 128;
860 (void)setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
861 sizeof(hold));
862 if (uid == 0)
863 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char *)&hold,
864 sizeof(hold));
865
866 if (to->sin_family == AF_INET) {
867 (void)printf("PING %s (%s)", hostname,
868 inet_ntoa(to->sin_addr));
869 if (source)
870 (void)printf(" from %s", shostname);
871 if (sweepmax)
872 (void)printf(": (%d ... %d) data bytes\n",
873 sweepmin, sweepmax);
874 else
875 (void)printf(": %d data bytes\n", datalen);
876
877 } else {
878 if (sweepmax)
879 (void)printf("PING %s: (%d ... %d) data bytes\n",
880 hostname, sweepmin, sweepmax);
881 else
882 (void)printf("PING %s: %d data bytes\n", hostname, datalen);
883 }
884
885 /*
886 * Use sigaction() instead of signal() to get unambiguous semantics,
887 * in particular with SA_RESTART not set.
888 */
889
890 sigemptyset(&si_sa.sa_mask);
891 si_sa.sa_flags = 0;
892
893 si_sa.sa_handler = stopit;
894 if (sigaction(SIGINT, &si_sa, 0) == -1) {
895 err(EX_OSERR, "sigaction SIGINT");
896 }
897
898 si_sa.sa_handler = status;
899 if (sigaction(SIGINFO, &si_sa, 0) == -1) {
900 err(EX_OSERR, "sigaction");
901 }
902
903 if (alarmtimeout > 0) {
904 si_sa.sa_handler = stopit;
905 if (sigaction(SIGALRM, &si_sa, 0) == -1)
906 err(EX_OSERR, "sigaction SIGALRM");
907 }
908
909 bzero(&msg, sizeof(msg));
910 msg.msg_name = (caddr_t)&from;
911 msg.msg_iov = &iov;
912 msg.msg_iovlen = 1;
913 #ifdef SO_TIMESTAMP
914 msg.msg_control = (caddr_t)ctrl;
915 #endif
916 iov.iov_base = packet;
917 iov.iov_len = IP_MAXPACKET;
918
919 if (preload == 0)
920 pinger(); /* send the first ping */
921 else {
922 if (npackets != 0 && preload > npackets)
923 preload = npackets;
924 while (preload--) /* fire off them quickies */
925 pinger();
926 }
927 (void)gettimeofday(&last, NULL);
928
929 if (options & F_FLOOD) {
930 intvl.tv_sec = 0;
931 intvl.tv_usec = 10000;
932 } else {
933 intvl.tv_sec = interval / 1000;
934 intvl.tv_usec = interval % 1000 * 1000;
935 }
936
937 almost_done = 0;
938 while (!finish_up) {
939 struct timeval now, timeout;
940 fd_set rfds;
941 int cc, n;
942 int tc = -1;
943
944 check_status();
945 if ((unsigned)s >= FD_SETSIZE)
946 errx(EX_OSERR, "descriptor too large");
947 FD_ZERO(&rfds);
948 FD_SET(s, &rfds);
949 (void)gettimeofday(&now, NULL);
950 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
951 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
952 while (timeout.tv_usec < 0) {
953 timeout.tv_usec += 1000000;
954 timeout.tv_sec--;
955 }
956 while (timeout.tv_usec >= 1000000) {
957 timeout.tv_usec -= 1000000;
958 timeout.tv_sec++;
959 }
960 if (timeout.tv_sec < 0)
961 timeout.tv_sec = timeout.tv_usec = 0;
962 n = select(s + 1, &rfds, NULL, NULL, &timeout);
963 if (n < 0)
964 continue; /* Must be EINTR. */
965 if (n == 1) {
966 struct timeval *tv = NULL;
967 #ifdef SO_TIMESTAMP
968 struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl;
969
970 msg.msg_controllen = sizeof(ctrl);
971 #endif
972 msg.msg_namelen = sizeof(from);
973 if ((cc = recvmsg(s, &msg, 0)) < 0) {
974 if (errno == EINTR)
975 continue;
976 warn("recvmsg");
977 continue;
978 }
979 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg != NULL; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
980 #ifdef SO_TIMESTAMP
981 if (cmsg->cmsg_level == SOL_SOCKET &&
982 cmsg->cmsg_type == SCM_TIMESTAMP &&
983 cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) {
984 /* Copy to avoid alignment problems: */
985 memcpy(&now, CMSG_DATA(cmsg), sizeof(now));
986 tv = &now;
987 }
988 #endif
989 if (cmsg->cmsg_level == SOL_SOCKET &&
990 cmsg->cmsg_type == SO_TRAFFIC_CLASS &&
991 cmsg->cmsg_len == CMSG_LEN(sizeof(int))) {
992 /* Copy to avoid alignment problems: */
993 memcpy(&tc, CMSG_DATA(cmsg), sizeof(tc));
994 }
995 }
996 if (tv == NULL) {
997 (void)gettimeofday(&now, NULL);
998 tv = &now;
999 }
1000 pr_pack((char *)packet, cc, &from, tv, tc);
1001 if ((options & F_ONCE && nreceived) ||
1002 (npackets && nreceived >= npackets))
1003 break;
1004 }
1005 if (n == 0 || options & F_FLOOD) {
1006 if (sweepmax && sntransmitted == snpackets) {
1007 for (i = 0; i < sweepincr ; ++i)
1008 *datap++ = i;
1009 datalen += sweepincr;
1010 if (datalen > sweepmax)
1011 break;
1012 send_len = icmp_len + datalen;
1013 sntransmitted = 0;
1014 }
1015 if (!npackets || ntransmitted < npackets)
1016 pinger();
1017 else {
1018 if (almost_done)
1019 break;
1020 almost_done = 1;
1021 intvl.tv_usec = 0;
1022 if (nreceived) {
1023 intvl.tv_sec = 2 * tmax / 1000;
1024 if (!intvl.tv_sec)
1025 intvl.tv_sec = 1;
1026 } else {
1027 intvl.tv_sec = waittime / 1000;
1028 intvl.tv_usec = waittime % 1000 * 1000;
1029 }
1030 }
1031 (void)gettimeofday(&last, NULL);
1032 if (ntransmitted - nreceived - 1 > nmissedmax) {
1033 nmissedmax = ntransmitted - nreceived - 1;
1034 if (options & F_MISSED)
1035 (void)write(STDOUT_FILENO, &BBELL, 1);
1036 if (!(options & F_QUIET))
1037 printf("Request timeout for icmp_seq %ld\n", ntransmitted - 2);
1038 }
1039 }
1040 }
1041 finish();
1042 /* NOTREACHED */
1043 exit(0); /* Make the compiler happy */
1044 }
1045
1046 /*
1047 * stopit --
1048 * Set the global bit that causes the main loop to quit.
1049 * Do NOT call finish() from here, since finish() does far too much
1050 * to be called from a signal handler.
1051 */
1052 void
1053 stopit(sig)
1054 int sig __unused;
1055 {
1056
1057 /*
1058 * When doing reverse DNS lookups, the finish_up flag might not
1059 * be noticed for a while. Just exit if we get a second SIGINT.
1060 */
1061 if (!(options & F_NUMERIC) && finish_up)
1062 _exit(nreceived ? 0 : 2);
1063 finish_up = 1;
1064 }
1065
1066 /*
1067 * pinger --
1068 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
1069 * will be added on by the kernel. The ID field is our UNIX process ID,
1070 * and the sequence number is an ascending integer. The first TIMEVAL_LEN
1071 * bytes of the data portion are used to hold a UNIX "timeval" struct in
1072 * host byte-order, to compute the round-trip time.
1073 */
1074 static void
1075 pinger(void)
1076 {
1077 struct timeval now;
1078 struct tv32 tv32;
1079 struct ip *ip;
1080 struct icmp *icp;
1081 int cc, i;
1082 u_char *packet;
1083
1084 packet = outpack;
1085 icp = (struct icmp *)outpack;
1086 icp->icmp_type = icmp_type;
1087 icp->icmp_code = 0;
1088 icp->icmp_cksum = 0;
1089 icp->icmp_seq = htons(ntransmitted);
1090 icp->icmp_id = ident; /* ID */
1091
1092 CLR(ntransmitted % mx_dup_ck);
1093
1094 if ((options & F_TIME) || timing) {
1095 (void)gettimeofday(&now, NULL);
1096
1097 tv32.tv32_sec = htonl(now.tv_sec);
1098 tv32.tv32_usec = htonl(now.tv_usec);
1099 if (options & F_TIME)
1100 icp->icmp_otime = htonl((now.tv_sec % (24*60*60))
1101 * 1000 + now.tv_usec / 1000);
1102 if (timing)
1103 bcopy((void *)&tv32,
1104 (void *)&outpack[ICMP_MINLEN + phdr_len],
1105 sizeof(tv32));
1106 }
1107
1108 cc = ICMP_MINLEN + phdr_len + datalen;
1109
1110 /* compute ICMP checksum here */
1111 icp->icmp_cksum = in_cksum((u_short *)icp, cc);
1112
1113 if (options & F_HDRINCL) {
1114 cc += sizeof(struct ip);
1115 ip = (struct ip *)outpackhdr;
1116 ip->ip_len = cc;
1117 ip->ip_sum = in_cksum((u_short *)outpackhdr, cc);
1118 packet = outpackhdr;
1119 }
1120 if (how_traffic_class == 2) {
1121 struct msghdr msg;
1122 struct iovec iov;
1123 char *cmbuf[CMSG_SPACE(sizeof(int))];
1124 struct cmsghdr *cm = (struct cmsghdr *)cmbuf;
1125
1126 msg.msg_name = &whereto;
1127 msg.msg_namelen = sizeof(whereto);
1128
1129 iov.iov_base = packet;
1130 iov.iov_len = cc;
1131 msg.msg_iov = &iov;
1132 msg.msg_iovlen = 1;
1133
1134 cm->cmsg_len = CMSG_LEN(sizeof(int));
1135 cm->cmsg_level = SOL_SOCKET;
1136 cm->cmsg_type = SO_TRAFFIC_CLASS;
1137 *(int *)CMSG_DATA(cm) = traffic_class;
1138 msg.msg_control = cm;
1139 msg.msg_controllen = CMSG_SPACE(sizeof(int));
1140
1141 msg.msg_flags = 0;
1142
1143 i = sendmsg(s, &msg, 0);
1144 } else {
1145 i = sendto(s, (char *)packet, cc, 0, (struct sockaddr *)&whereto,
1146 sizeof(whereto));
1147 }
1148 if (i < 0 || i != cc) {
1149 if (i < 0) {
1150 if (options & F_FLOOD && errno == ENOBUFS) {
1151 usleep(FLOOD_BACKOFF);
1152 return;
1153 }
1154 warn("sendto");
1155 } else {
1156 warn("%s: partial write: %d of %d bytes",
1157 hostname, i, cc);
1158 }
1159 }
1160 ntransmitted++;
1161 sntransmitted++;
1162 if (!(options & F_QUIET) && options & F_FLOOD)
1163 (void)write(STDOUT_FILENO, &DOT, 1);
1164 }
1165
1166 /*
1167 * pr_pack --
1168 * Print out the packet, if it came from us. This logic is necessary
1169 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1170 * which arrive ('tis only fair). This permits multiple copies of this
1171 * program to be run without having intermingled output (or statistics!).
1172 */
1173 static void
1174 pr_pack(buf, cc, from, tv, tc)
1175 char *buf;
1176 int cc;
1177 struct sockaddr_in *from;
1178 struct timeval *tv;
1179 int tc;
1180 {
1181 struct in_addr ina;
1182 u_char *cp, *dp;
1183 struct icmp *icp;
1184 struct ip *ip;
1185 const void *tp;
1186 double triptime;
1187 int dupflag, hlen, i, j, recv_len, seq;
1188 static int old_rrlen;
1189 static char old_rr[MAX_IPOPTLEN];
1190
1191 /* Check the IP header */
1192 ip = (struct ip *)buf;
1193 hlen = ip->ip_hl << 2;
1194 recv_len = cc;
1195 if (cc < hlen + ICMP_MINLEN) {
1196 if (options & F_VERBOSE)
1197 warn("packet too short (%d bytes) from %s", cc,
1198 inet_ntoa(from->sin_addr));
1199 return;
1200 }
1201
1202 /* Now the ICMP part */
1203 cc -= hlen;
1204 icp = (struct icmp *)(buf + hlen);
1205 if (icp->icmp_type == icmp_type_rsp) {
1206 if (icp->icmp_id != ident)
1207 return; /* 'Twas not our ECHO */
1208 ++nreceived;
1209 triptime = 0.0;
1210 if (timing) {
1211 struct timeval tv1;
1212 struct tv32 tv32;
1213 #ifndef icmp_data
1214 tp = &icp->icmp_ip;
1215 #else
1216 tp = icp->icmp_data;
1217 #endif
1218 tp = (const char *)tp + phdr_len;
1219
1220 if (cc - ICMP_MINLEN - phdr_len >= sizeof(tv1)) {
1221 /* Copy to avoid alignment problems: */
1222 memcpy(&tv32, tp, sizeof(tv32));
1223 tv1.tv_sec = ntohl(tv32.tv32_sec);
1224 tv1.tv_usec = ntohl(tv32.tv32_usec);
1225 tvsub(tv, &tv1);
1226 triptime = ((double)tv->tv_sec) * 1000.0 +
1227 ((double)tv->tv_usec) / 1000.0;
1228 tsum += triptime;
1229 tsumsq += triptime * triptime;
1230 if (triptime < tmin)
1231 tmin = triptime;
1232 if (triptime > tmax)
1233 tmax = triptime;
1234 } else
1235 timing = 0;
1236 }
1237
1238 seq = ntohs(icp->icmp_seq);
1239
1240 if (TST(seq % mx_dup_ck)) {
1241 ++nrepeats;
1242 --nreceived;
1243 dupflag = 1;
1244 } else {
1245 SET(seq % mx_dup_ck);
1246 dupflag = 0;
1247 }
1248
1249 if (options & F_QUIET)
1250 return;
1251
1252 if (options & F_WAITTIME && triptime > waittime) {
1253 ++nrcvtimeout;
1254 return;
1255 }
1256
1257 if (options & F_FLOOD)
1258 (void)write(STDOUT_FILENO, &BSPACE, 1);
1259 else {
1260 (void)printf("%d bytes from %s: icmp_seq=%u", cc,
1261 inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr),
1262 seq);
1263 (void)printf(" ttl=%d", ip->ip_ttl);
1264 if (timing)
1265 (void)printf(" time=%.3f ms", triptime);
1266 if (tc != -1) {
1267 (void)printf(" tc=%d", tc);
1268 }
1269 if (dupflag && no_dup == 0) {
1270 (void)printf(" (DUP!)");
1271 }
1272 if (options & F_AUDIBLE)
1273 (void)write(STDOUT_FILENO, &BBELL, 1);
1274 if (options & F_MASK) {
1275 /* Just prentend this cast isn't ugly */
1276 (void)printf(" mask=%s",
1277 pr_addr(*(struct in_addr *)&(icp->icmp_mask)));
1278 }
1279 if (options & F_TIME) {
1280 (void)printf(" tso=%s", pr_ntime(icp->icmp_otime));
1281 (void)printf(" tsr=%s", pr_ntime(icp->icmp_rtime));
1282 (void)printf(" tst=%s", pr_ntime(icp->icmp_ttime));
1283 }
1284 if (recv_len != send_len) {
1285 (void)printf(
1286 "\nwrong total length %d instead of %d",
1287 recv_len, send_len);
1288 }
1289 /* check the data */
1290 cp = (u_char*)&icp->icmp_data[phdr_len];
1291 dp = &outpack[ICMP_MINLEN + phdr_len];
1292 cc -= ICMP_MINLEN + phdr_len;
1293 i = 0;
1294 if (timing) { /* don't check variable timestamp */
1295 cp += TIMEVAL_LEN;
1296 dp += TIMEVAL_LEN;
1297 cc -= TIMEVAL_LEN;
1298 i += TIMEVAL_LEN;
1299 }
1300 for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) {
1301 if (*cp != *dp) {
1302 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x",
1303 i, *dp, *cp);
1304 (void)printf("\ncp:");
1305 cp = (u_char*)&icp->icmp_data[0];
1306 for (i = 0; i < datalen; ++i, ++cp) {
1307 if ((i % 16) == 8)
1308 (void)printf("\n\t");
1309 (void)printf("%2x ", *cp);
1310 }
1311 (void)printf("\ndp:");
1312 cp = &outpack[ICMP_MINLEN];
1313 for (i = 0; i < datalen; ++i, ++cp) {
1314 if ((i % 16) == 8)
1315 (void)printf("\n\t");
1316 (void)printf("%2x ", *cp);
1317 }
1318 break;
1319 }
1320 }
1321 }
1322 } else {
1323 /*
1324 * We've got something other than an ECHOREPLY.
1325 * See if it's a reply to something that we sent.
1326 * We can compare IP destination, protocol,
1327 * and ICMP type and ID.
1328 *
1329 * Only print all the error messages if we are running
1330 * as root to avoid leaking information not normally
1331 * available to those not running as root.
1332 */
1333 #ifndef icmp_data
1334 struct ip *oip = &icp->icmp_ip;
1335 #else
1336 struct ip *oip = (struct ip *)icp->icmp_data;
1337 #endif
1338 struct icmp *oicmp = (struct icmp *)(oip + 1);
1339
1340 if (((options & F_VERBOSE) && uid == 0) ||
1341 (!(options & F_QUIET2) &&
1342 (oip->ip_dst.s_addr == whereto.sin_addr.s_addr) &&
1343 (oip->ip_p == IPPROTO_ICMP) &&
1344 (oicmp->icmp_type == ICMP_ECHO) &&
1345 (oicmp->icmp_id == ident))) {
1346 (void)printf("%d bytes from %s: ", cc,
1347 pr_addr(from->sin_addr));
1348 pr_icmph(icp);
1349 } else
1350 return;
1351 }
1352
1353 /* Display any IP options */
1354 cp = (u_char *)buf + sizeof(struct ip);
1355
1356 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp)
1357 switch (*cp) {
1358 case IPOPT_EOL:
1359 hlen = 0;
1360 break;
1361 case IPOPT_LSRR:
1362 case IPOPT_SSRR:
1363 (void)printf(*cp == IPOPT_LSRR ?
1364 "\nLSRR: " : "\nSSRR: ");
1365 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1;
1366 hlen -= 2;
1367 cp += 2;
1368 if (j >= INADDR_LEN &&
1369 j <= hlen - (int)sizeof(struct ip)) {
1370 for (;;) {
1371 bcopy(++cp, &ina.s_addr, INADDR_LEN);
1372 if (ina.s_addr == 0)
1373 (void)printf("\t0.0.0.0");
1374 else
1375 (void)printf("\t%s",
1376 pr_addr(ina));
1377 hlen -= INADDR_LEN;
1378 cp += INADDR_LEN - 1;
1379 j -= INADDR_LEN;
1380 if (j < INADDR_LEN)
1381 break;
1382 (void)putchar('\n');
1383 }
1384 } else
1385 (void)printf("\t(truncated route)\n");
1386 break;
1387 case IPOPT_RR:
1388 j = cp[IPOPT_OLEN]; /* get length */
1389 i = cp[IPOPT_OFFSET]; /* and pointer */
1390 hlen -= 2;
1391 cp += 2;
1392 if (i > j)
1393 i = j;
1394 i = i - IPOPT_MINOFF + 1;
1395 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) {
1396 old_rrlen = 0;
1397 continue;
1398 }
1399 if (i == old_rrlen
1400 && !bcmp((char *)cp, old_rr, i)
1401 && !(options & F_FLOOD)) {
1402 (void)printf("\t(same route)");
1403 hlen -= i;
1404 cp += i;
1405 break;
1406 }
1407 old_rrlen = i;
1408 bcopy((char *)cp, old_rr, i);
1409 (void)printf("\nRR: ");
1410 if (i >= INADDR_LEN &&
1411 i <= hlen - (int)sizeof(struct ip)) {
1412 for (;;) {
1413 bcopy(++cp, &ina.s_addr, INADDR_LEN);
1414 if (ina.s_addr == 0)
1415 (void)printf("\t0.0.0.0");
1416 else
1417 (void)printf("\t%s",
1418 pr_addr(ina));
1419 hlen -= INADDR_LEN;
1420 cp += INADDR_LEN - 1;
1421 i -= INADDR_LEN;
1422 if (i < INADDR_LEN)
1423 break;
1424 (void)putchar('\n');
1425 }
1426 } else
1427 (void)printf("\t(truncated route)");
1428 break;
1429 case IPOPT_NOP:
1430 (void)printf("\nNOP");
1431 break;
1432 default:
1433 (void)printf("\nunknown option %x", *cp);
1434 break;
1435 }
1436 if (!(options & F_FLOOD)) {
1437 (void)putchar('\n');
1438 (void)fflush(stdout);
1439 }
1440 }
1441
1442 /*
1443 * in_cksum --
1444 * Checksum routine for Internet Protocol family headers (C Version)
1445 */
1446 u_short
1447 in_cksum(addr, len)
1448 u_short *addr;
1449 int len;
1450 {
1451 int nleft, sum;
1452 u_short *w;
1453 union {
1454 u_short us;
1455 u_char uc[2];
1456 } last;
1457 u_short answer;
1458
1459 nleft = len;
1460 sum = 0;
1461 w = addr;
1462
1463 /*
1464 * Our algorithm is simple, using a 32 bit accumulator (sum), we add
1465 * sequential 16 bit words to it, and at the end, fold back all the
1466 * carry bits from the top 16 bits into the lower 16 bits.
1467 */
1468 while (nleft > 1) {
1469 sum += *w++;
1470 nleft -= 2;
1471 }
1472
1473 /* mop up an odd byte, if necessary */
1474 if (nleft == 1) {
1475 last.uc[0] = *(u_char *)w;
1476 last.uc[1] = 0;
1477 sum += last.us;
1478 }
1479
1480 /* add back carry outs from top 16 bits to low 16 bits */
1481 sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */
1482 sum += (sum >> 16); /* add carry */
1483 answer = ~sum; /* truncate to 16 bits */
1484 return(answer);
1485 }
1486
1487 /*
1488 * tvsub --
1489 * Subtract 2 timeval structs: out = out - in. Out is assumed to
1490 * be >= in.
1491 */
1492 static void
1493 tvsub(out, in)
1494 struct timeval *out, *in;
1495 {
1496
1497 if ((out->tv_usec -= in->tv_usec) < 0) {
1498 --out->tv_sec;
1499 out->tv_usec += 1000000;
1500 }
1501 out->tv_sec -= in->tv_sec;
1502 }
1503
1504 /*
1505 * status --
1506 * Print out statistics when SIGINFO is received.
1507 */
1508
1509 static void
1510 status(sig)
1511 int sig __unused;
1512 {
1513
1514 siginfo_p = 1;
1515 }
1516
1517 static void
1518 check_status()
1519 {
1520
1521 if (siginfo_p) {
1522 siginfo_p = 0;
1523 (void)fprintf(stderr, "\r%ld/%ld packets received (%.1f%%)",
1524 nreceived, ntransmitted,
1525 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0);
1526 if (nreceived && timing)
1527 (void)fprintf(stderr, " %.3f min / %.3f avg / %.3f max",
1528 tmin, tsum / (nreceived + nrepeats), tmax);
1529 (void)fprintf(stderr, "\n");
1530 }
1531 }
1532
1533 /*
1534 * finish --
1535 * Print out statistics, and give up.
1536 */
1537 static void
1538 finish()
1539 {
1540
1541 (void)signal(SIGINT, SIG_IGN);
1542 (void)signal(SIGALRM, SIG_IGN);
1543 (void)putchar('\n');
1544 (void)fflush(stdout);
1545 (void)printf("--- %s ping statistics ---\n", hostname);
1546 (void)printf("%ld packets transmitted, ", ntransmitted);
1547 (void)printf("%ld packets received, ", nreceived);
1548 if (nrepeats)
1549 (void)printf("+%ld duplicates, ", nrepeats);
1550 if (ntransmitted) {
1551 if (nreceived > ntransmitted)
1552 (void)printf("-- somebody's printing up packets!");
1553 else
1554 (void)printf("%.1f%% packet loss",
1555 ((ntransmitted - nreceived) * 100.0) /
1556 ntransmitted);
1557 }
1558 if (nrcvtimeout)
1559 (void)printf(", %ld packets out of wait time", nrcvtimeout);
1560 (void)putchar('\n');
1561 if (nreceived && timing) {
1562 double n = nreceived + nrepeats;
1563 double avg = tsum / n;
1564 double vari = tsumsq / n - avg * avg;
1565 (void)printf(
1566 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n",
1567 tmin, avg, tmax, sqrt(vari));
1568 }
1569
1570 if (nreceived)
1571 exit(0);
1572 else
1573 exit(2);
1574 }
1575
1576 #ifdef notdef
1577 static char *ttab[] = {
1578 "Echo Reply", /* ip + seq + udata */
1579 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */
1580 "Source Quench", /* IP */
1581 "Redirect", /* redirect type, gateway, + IP */
1582 "Echo",
1583 "Time Exceeded", /* transit, frag reassem + IP */
1584 "Parameter Problem", /* pointer + IP */
1585 "Timestamp", /* id + seq + three timestamps */
1586 "Timestamp Reply", /* " */
1587 "Info Request", /* id + sq */
1588 "Info Reply" /* " */
1589 };
1590 #endif
1591
1592 /*
1593 * pr_icmph --
1594 * Print a descriptive string about an ICMP header.
1595 */
1596 static void
1597 pr_icmph(icp)
1598 struct icmp *icp;
1599 {
1600
1601 switch(icp->icmp_type) {
1602 case ICMP_ECHOREPLY:
1603 (void)printf("Echo Reply\n");
1604 /* XXX ID + Seq + Data */
1605 break;
1606 case ICMP_UNREACH:
1607 switch(icp->icmp_code) {
1608 case ICMP_UNREACH_NET:
1609 (void)printf("Destination Net Unreachable\n");
1610 break;
1611 case ICMP_UNREACH_HOST:
1612 (void)printf("Destination Host Unreachable\n");
1613 break;
1614 case ICMP_UNREACH_PROTOCOL:
1615 (void)printf("Destination Protocol Unreachable\n");
1616 break;
1617 case ICMP_UNREACH_PORT:
1618 (void)printf("Destination Port Unreachable\n");
1619 break;
1620 case ICMP_UNREACH_NEEDFRAG:
1621 (void)printf("frag needed and DF set (MTU %d)\n",
1622 ntohs(icp->icmp_nextmtu));
1623 break;
1624 case ICMP_UNREACH_SRCFAIL:
1625 (void)printf("Source Route Failed\n");
1626 break;
1627 case ICMP_UNREACH_FILTER_PROHIB:
1628 (void)printf("Communication prohibited by filter\n");
1629 break;
1630 default:
1631 (void)printf("Dest Unreachable, Bad Code: %d\n",
1632 icp->icmp_code);
1633 break;
1634 }
1635 /* Print returned IP header information */
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_SOURCEQUENCH:
1643 (void)printf("Source Quench\n");
1644 #ifndef icmp_data
1645 pr_retip(&icp->icmp_ip);
1646 #else
1647 pr_retip((struct ip *)icp->icmp_data);
1648 #endif
1649 break;
1650 case ICMP_REDIRECT:
1651 switch(icp->icmp_code) {
1652 case ICMP_REDIRECT_NET:
1653 (void)printf("Redirect Network");
1654 break;
1655 case ICMP_REDIRECT_HOST:
1656 (void)printf("Redirect Host");
1657 break;
1658 case ICMP_REDIRECT_TOSNET:
1659 (void)printf("Redirect Type of Service and Network");
1660 break;
1661 case ICMP_REDIRECT_TOSHOST:
1662 (void)printf("Redirect Type of Service and Host");
1663 break;
1664 default:
1665 (void)printf("Redirect, Bad Code: %d", icp->icmp_code);
1666 break;
1667 }
1668 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr));
1669 #ifndef icmp_data
1670 pr_retip(&icp->icmp_ip);
1671 #else
1672 pr_retip((struct ip *)icp->icmp_data);
1673 #endif
1674 break;
1675 case ICMP_ECHO:
1676 (void)printf("Echo Request\n");
1677 /* XXX ID + Seq + Data */
1678 break;
1679 case ICMP_TIMXCEED:
1680 switch(icp->icmp_code) {
1681 case ICMP_TIMXCEED_INTRANS:
1682 (void)printf("Time to live exceeded\n");
1683 break;
1684 case ICMP_TIMXCEED_REASS:
1685 (void)printf("Frag reassembly time exceeded\n");
1686 break;
1687 default:
1688 (void)printf("Time exceeded, Bad Code: %d\n",
1689 icp->icmp_code);
1690 break;
1691 }
1692 #ifndef icmp_data
1693 pr_retip(&icp->icmp_ip);
1694 #else
1695 pr_retip((struct ip *)icp->icmp_data);
1696 #endif
1697 break;
1698 case ICMP_PARAMPROB:
1699 (void)printf("Parameter problem: pointer = 0x%02x\n",
1700 icp->icmp_hun.ih_pptr);
1701 #ifndef icmp_data
1702 pr_retip(&icp->icmp_ip);
1703 #else
1704 pr_retip((struct ip *)icp->icmp_data);
1705 #endif
1706 break;
1707 case ICMP_TSTAMP:
1708 (void)printf("Timestamp\n");
1709 /* XXX ID + Seq + 3 timestamps */
1710 break;
1711 case ICMP_TSTAMPREPLY:
1712 (void)printf("Timestamp Reply\n");
1713 /* XXX ID + Seq + 3 timestamps */
1714 break;
1715 case ICMP_IREQ:
1716 (void)printf("Information Request\n");
1717 /* XXX ID + Seq */
1718 break;
1719 case ICMP_IREQREPLY:
1720 (void)printf("Information Reply\n");
1721 /* XXX ID + Seq */
1722 break;
1723 case ICMP_MASKREQ:
1724 (void)printf("Address Mask Request\n");
1725 break;
1726 case ICMP_MASKREPLY:
1727 (void)printf("Address Mask Reply\n");
1728 break;
1729 case ICMP_ROUTERADVERT:
1730 (void)printf("Router Advertisement\n");
1731 break;
1732 case ICMP_ROUTERSOLICIT:
1733 (void)printf("Router Solicitation\n");
1734 break;
1735 default:
1736 (void)printf("Bad ICMP type: %d\n", icp->icmp_type);
1737 }
1738 }
1739
1740 /*
1741 * pr_iph --
1742 * Print an IP header with options.
1743 */
1744 static void
1745 pr_iph(ip)
1746 struct ip *ip;
1747 {
1748 u_char *cp;
1749 int hlen;
1750
1751 hlen = ip->ip_hl << 2;
1752 cp = (u_char *)ip + 20; /* point to options */
1753
1754 (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n");
1755 (void)printf(" %1x %1x %02x %04x %04x",
1756 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len),
1757 ntohs(ip->ip_id));
1758 (void)printf(" %1lx %04lx",
1759 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13,
1760 (u_long) ntohl(ip->ip_off) & 0x1fff);
1761 (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p,
1762 ntohs(ip->ip_sum));
1763 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr));
1764 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr));
1765 /* dump any option bytes */
1766 while (hlen-- > 20) {
1767 (void)printf("%02x", *cp++);
1768 }
1769 (void)putchar('\n');
1770 }
1771
1772 /*
1773 * pr_addr --
1774 * Return an ascii host address as a dotted quad and optionally with
1775 * a hostname.
1776 */
1777 static char *
1778 pr_addr(ina)
1779 struct in_addr ina;
1780 {
1781 struct hostent *hp;
1782 static char buf[16 + 3 + MAXHOSTNAMELEN];
1783
1784 if ((options & F_NUMERIC) ||
1785 !(hp = gethostbyaddr((char *)&ina, 4, AF_INET)))
1786 return inet_ntoa(ina);
1787 else
1788 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name,
1789 inet_ntoa(ina));
1790 return(buf);
1791 }
1792
1793 /*
1794 * pr_retip --
1795 * Dump some info on a returned (via ICMP) IP packet.
1796 */
1797 static void
1798 pr_retip(ip)
1799 struct ip *ip;
1800 {
1801 u_char *cp;
1802 int hlen;
1803
1804 pr_iph(ip);
1805 hlen = ip->ip_hl << 2;
1806 cp = (u_char *)ip + hlen;
1807
1808 if (ip->ip_p == 6)
1809 (void)printf("TCP: from port %u, to port %u (decimal)\n",
1810 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
1811 else if (ip->ip_p == 17)
1812 (void)printf("UDP: from port %u, to port %u (decimal)\n",
1813 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
1814 }
1815
1816 static char *
1817 pr_ntime (n_time timestamp)
1818 {
1819 static char buf[10];
1820 int hour, min, sec;
1821
1822 sec = ntohl(timestamp) / 1000;
1823 hour = sec / 60 / 60;
1824 min = (sec % (60 * 60)) / 60;
1825 sec = (sec % (60 * 60)) % 60;
1826
1827 (void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec);
1828
1829 return (buf);
1830 }
1831
1832 static void
1833 fill(bp, patp)
1834 char *bp, *patp;
1835 {
1836 char *cp;
1837 int pat[16];
1838 u_int ii, jj, kk;
1839
1840 for (cp = patp; *cp; cp++) {
1841 if (!isxdigit(*cp))
1842 errx(EX_USAGE,
1843 "patterns must be specified as hex digits");
1844
1845 }
1846 ii = sscanf(patp,
1847 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
1848 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
1849 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
1850 &pat[13], &pat[14], &pat[15]);
1851
1852 if (ii > 0)
1853 for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii)
1854 for (jj = 0; jj < ii; ++jj)
1855 bp[jj + kk] = pat[jj];
1856 if (!(options & F_QUIET)) {
1857 (void)printf("PATTERN: 0x");
1858 for (jj = 0; jj < ii; ++jj)
1859 (void)printf("%02x", bp[jj] & 0xFF);
1860 (void)printf("\n");
1861 }
1862 }
1863
1864 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
1865 #define SECOPT " [-P policy]"
1866 #else
1867 #define SECOPT ""
1868 #endif
1869 static void
1870 usage()
1871 {
1872
1873 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1874 "usage: ping [-AaDdfnoQqRrv] [-b boundif] [-c count] [-G sweepmaxsize] [-g sweepminsize]",
1875 " [-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]",
1876 " " SECOPT " [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]",
1877 " [-W waittime] [-z tos] host",
1878 " ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]",
1879 " [-M mask | time] [-m ttl]" SECOPT " [-p pattern] [-S src_addr]",
1880 " [-s packetsize] [-T ttl] [-t timeout] [-W waittime]",
1881 " [-z tos] mcast-group");
1882 exit(EX_USAGE);
1883 }
mirror of network_cmds