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[apple/network_cmds.git] / ping.tproj / ping.c
1 /*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Mike Muuss.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #if 0
34 #ifndef lint
35 static const char copyright[] =
36 "@(#) Copyright (c) 1989, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
38 #endif /* not lint */
39
40 #ifndef lint
41 static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93";
42 #endif /* not lint */
43 #endif
44 #include <sys/cdefs.h>
45 #ifndef __APPLE__
46 __FBSDID("$FreeBSD: /repoman/r/ncvs/src/sbin/ping/ping.c,v 1.105 2004/08/14 17:46:10 stefanf Exp $");
47 #endif
48
49 /*
50 * P I N G . C
51 *
52 * Using the Internet Control Message Protocol (ICMP) "ECHO" facility,
53 * measure round-trip-delays and packet loss across network paths.
54 *
55 * Author -
56 * Mike Muuss
57 * U. S. Army Ballistic Research Laboratory
58 * December, 1983
59 *
60 * Status -
61 * Public Domain. Distribution Unlimited.
62 * Bugs -
63 * More statistics could always be gathered.
64 * This program has to run SUID to ROOT to access the ICMP socket.
65 */
66
67 #include <sys/param.h> /* NB: we rely on this for <sys/types.h> */
68 #include <sys/socket.h>
69 #include <sys/sysctl.h>
70 #include <sys/time.h>
71 #include <sys/uio.h>
72
73 #include <netinet/in.h>
74 #include <netinet/in_systm.h>
75 #include <netinet/ip.h>
76 #include <netinet/ip_icmp.h>
77 #include <netinet/ip_var.h>
78 #include <arpa/inet.h>
79
80 #ifdef IPSEC
81 #include <netinet6/ipsec.h>
82 #endif /*IPSEC*/
83
84 #include <ctype.h>
85 #include <err.h>
86 #include <errno.h>
87 #include <math.h>
88 #include <netdb.h>
89 #include <signal.h>
90 #include <stdio.h>
91 #include <stdlib.h>
92 #include <string.h>
93 #include <sysexits.h>
94 #include <unistd.h>
95
96 #define INADDR_LEN ((int)sizeof(in_addr_t))
97 #define TIMEVAL_LEN ((int)sizeof(struct timeval))
98 #define MASK_LEN (ICMP_MASKLEN - ICMP_MINLEN)
99 #define TS_LEN (ICMP_TSLEN - ICMP_MINLEN)
100 #define DEFDATALEN 56 /* default data length */
101 #define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */
102 /* runs out of buffer space */
103 #define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN)
104 #define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN)
105 #define MAXWAIT 10 /* max seconds to wait for response */
106 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */
107 #define MAXTOS 255
108
109 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
110 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
111 #define SET(bit) (A(bit) |= B(bit))
112 #define CLR(bit) (A(bit) &= (~B(bit)))
113 #define TST(bit) (A(bit) & B(bit))
114
115 /* various options */
116 int options;
117 #define F_FLOOD 0x0001
118 #define F_INTERVAL 0x0002
119 #define F_NUMERIC 0x0004
120 #define F_PINGFILLED 0x0008
121 #define F_QUIET 0x0010
122 #define F_RROUTE 0x0020
123 #define F_SO_DEBUG 0x0040
124 #define F_SO_DONTROUTE 0x0080
125 #define F_VERBOSE 0x0100
126 #define F_QUIET2 0x0200
127 #define F_NOLOOP 0x0400
128 #define F_MTTL 0x0800
129 #define F_MIF 0x1000
130 #define F_AUDIBLE 0x2000
131 #ifdef IPSEC
132 #ifdef IPSEC_POLICY_IPSEC
133 #define F_POLICY 0x4000
134 #endif /*IPSEC_POLICY_IPSEC*/
135 #endif /*IPSEC*/
136 #define F_TTL 0x8000
137 #define F_MISSED 0x10000
138 #define F_ONCE 0x20000
139 #define F_HDRINCL 0x40000
140 #define F_MASK 0x80000
141 #define F_TIME 0x100000
142
143 /*
144 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
145 * number of received sequence numbers we can keep track of. Change 128
146 * to 8192 for complete accuracy...
147 */
148 #define MAX_DUP_CHK (8 * 128)
149 int mx_dup_ck = MAX_DUP_CHK;
150 char rcvd_tbl[MAX_DUP_CHK / 8];
151
152 struct sockaddr_in whereto; /* who to ping */
153 int datalen = DEFDATALEN;
154 int maxpayload;
155 int s; /* socket file descriptor */
156 u_char outpackhdr[IP_MAXPACKET], *outpack;
157 char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */
158 char BSPACE = '\b'; /* characters written for flood */
159 char DOT = '.';
160 char *hostname;
161 char *shostname;
162 int ident; /* process id to identify our packets */
163 int uid; /* cached uid for micro-optimization */
164 u_char icmp_type = ICMP_ECHO;
165 u_char icmp_type_rsp = ICMP_ECHOREPLY;
166 int phdr_len = 0;
167 int send_len;
168
169 /* counters */
170 long nmissedmax; /* max value of ntransmitted - nreceived - 1 */
171 long npackets; /* max packets to transmit */
172 long nreceived; /* # of packets we got back */
173 long nrepeats; /* number of duplicates */
174 long ntransmitted; /* sequence # for outbound packets = #sent */
175 int interval = 1000; /* interval between packets, ms */
176
177 /* timing */
178 int timing; /* flag to do timing */
179 double tmin = 999999999.0; /* minimum round trip time */
180 double tmax = 0.0; /* maximum round trip time */
181 double tsum = 0.0; /* sum of all times, for doing average */
182 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */
183
184 volatile sig_atomic_t finish_up; /* nonzero if we've been told to finish up */
185 volatile sig_atomic_t siginfo_p;
186
187 static void fill(char *, char *);
188 static u_short in_cksum(u_short *, int);
189 static void check_status(void);
190 static void finish(void) __dead2;
191 static void pinger(void);
192 static char *pr_addr(struct in_addr);
193 static char *pr_ntime(n_time);
194 static void pr_icmph(struct icmp *);
195 static void pr_iph(struct ip *);
196 static void pr_pack(char *, int, struct sockaddr_in *, struct timeval *);
197 static void pr_retip(struct ip *);
198 static void status(int);
199 static void stopit(int);
200 static void tvsub(struct timeval *, struct timeval *);
201 static void usage(void) __dead2;
202
203 int
204 main(argc, argv)
205 int argc;
206 char *const *argv;
207 {
208 struct sockaddr_in from, sock_in;
209 struct in_addr ifaddr;
210 struct timeval last, intvl;
211 struct iovec iov;
212 struct ip *ip;
213 struct msghdr msg;
214 struct sigaction si_sa;
215 size_t sz;
216 u_char *datap, packet[IP_MAXPACKET];
217 char *ep, *source, *target, *payload;
218 struct hostent *hp;
219 #ifdef IPSEC_POLICY_IPSEC
220 char *policy_in, *policy_out;
221 #endif
222 struct sockaddr_in *to;
223 double t;
224 u_long alarmtimeout, ultmp;
225 int almost_done, ch, df, hold, i, icmp_len, mib[4], preload, sockerrno,
226 tos, ttl;
227 char ctrl[CMSG_SPACE(sizeof(struct timeval))];
228 char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN];
229 #ifdef IP_OPTIONS
230 char rspace[MAX_IPOPTLEN]; /* record route space */
231 #endif
232 unsigned char loop, mttl;
233
234 payload = source = NULL;
235 #ifdef IPSEC_POLICY_IPSEC
236 policy_in = policy_out = NULL;
237 #endif
238
239 /*
240 * Do the stuff that we need root priv's for *first*, and
241 * then drop our setuid bit. Save error reporting for
242 * after arg parsing.
243 */
244 s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
245 sockerrno = errno;
246
247 setuid(getuid());
248 uid = getuid();
249
250 alarmtimeout = df = preload = tos = 0;
251
252 outpack = outpackhdr + sizeof(struct ip);
253 while ((ch = getopt(argc, argv,
254 "Aac:DdfI:i:Ll:M:m:nop:QqRrS:s:T:t:vz:"
255 #ifdef IPSEC
256 #ifdef IPSEC_POLICY_IPSEC
257 "P:"
258 #endif /*IPSEC_POLICY_IPSEC*/
259 #endif /*IPSEC*/
260 )) != -1)
261 {
262 switch(ch) {
263 case 'A':
264 options |= F_MISSED;
265 break;
266 case 'a':
267 options |= F_AUDIBLE;
268 break;
269 case 'c':
270 ultmp = strtoul(optarg, &ep, 0);
271 if (*ep || ep == optarg || ultmp > LONG_MAX || !ultmp)
272 errx(EX_USAGE,
273 "invalid count of packets to transmit: `%s'",
274 optarg);
275 npackets = ultmp;
276 break;
277 case 'D':
278 options |= F_HDRINCL;
279 df = 1;
280 break;
281 case 'd':
282 options |= F_SO_DEBUG;
283 break;
284 case 'f':
285 if (uid) {
286 errno = EPERM;
287 err(EX_NOPERM, "-f flag");
288 }
289 options |= F_FLOOD;
290 setbuf(stdout, (char *)NULL);
291 break;
292 case 'I': /* multicast interface */
293 if (inet_aton(optarg, &ifaddr) == 0)
294 errx(EX_USAGE,
295 "invalid multicast interface: `%s'",
296 optarg);
297 options |= F_MIF;
298 break;
299 case 'i': /* wait between sending packets */
300 t = strtod(optarg, &ep) * 1000.0;
301 if (*ep || ep == optarg || t > (double)INT_MAX)
302 errx(EX_USAGE, "invalid timing interval: `%s'",
303 optarg);
304 options |= F_INTERVAL;
305 interval = (int)t;
306 if (uid && interval < 1000) {
307 errno = EPERM;
308 err(EX_NOPERM, "-i interval too short");
309 }
310 break;
311 case 'L':
312 options |= F_NOLOOP;
313 loop = 0;
314 break;
315 case 'l':
316 ultmp = strtoul(optarg, &ep, 0);
317 if (*ep || ep == optarg || ultmp > INT_MAX)
318 errx(EX_USAGE,
319 "invalid preload value: `%s'", optarg);
320 if (uid) {
321 errno = EPERM;
322 err(EX_NOPERM, "-l flag");
323 }
324 preload = ultmp;
325 break;
326 case 'M':
327 switch(optarg[0]) {
328 case 'M':
329 case 'm':
330 options |= F_MASK;
331 break;
332 case 'T':
333 case 't':
334 options |= F_TIME;
335 break;
336 default:
337 errx(EX_USAGE, "invalid message: `%c'", optarg[0]);
338 break;
339 }
340 break;
341 case 'm': /* TTL */
342 ultmp = strtoul(optarg, &ep, 0);
343 if (*ep || ep == optarg || ultmp > MAXTTL)
344 errx(EX_USAGE, "invalid TTL: `%s'", optarg);
345 ttl = ultmp;
346 options |= F_TTL;
347 break;
348 case 'n':
349 options |= F_NUMERIC;
350 break;
351 case 'o':
352 options |= F_ONCE;
353 break;
354 #ifdef IPSEC
355 #ifdef IPSEC_POLICY_IPSEC
356 case 'P':
357 options |= F_POLICY;
358 if (!strncmp("in", optarg, 2))
359 policy_in = strdup(optarg);
360 else if (!strncmp("out", optarg, 3))
361 policy_out = strdup(optarg);
362 else
363 errx(1, "invalid security policy");
364 break;
365 #endif /*IPSEC_POLICY_IPSEC*/
366 #endif /*IPSEC*/
367 case 'p': /* fill buffer with user pattern */
368 options |= F_PINGFILLED;
369 payload = optarg;
370 break;
371 case 'Q':
372 options |= F_QUIET2;
373 break;
374 case 'q':
375 options |= F_QUIET;
376 break;
377 case 'R':
378 options |= F_RROUTE;
379 break;
380 case 'r':
381 options |= F_SO_DONTROUTE;
382 break;
383 case 'S':
384 source = optarg;
385 break;
386 case 's': /* size of packet to send */
387 ultmp = strtoul(optarg, &ep, 0);
388 if (*ep || ep == optarg)
389 errx(EX_USAGE, "invalid packet size: `%s'",
390 optarg);
391 #ifndef __APPLE__
392 if (uid != 0 && ultmp > DEFDATALEN) {
393 errno = EPERM;
394 err(EX_NOPERM,
395 "packet size too large: %lu > %u",
396 ultmp, DEFDATALEN);
397 }
398 #endif
399 datalen = ultmp;
400 break;
401 case 'T': /* multicast TTL */
402 ultmp = strtoul(optarg, &ep, 0);
403 if (*ep || ep == optarg || ultmp > MAXTTL)
404 errx(EX_USAGE, "invalid multicast TTL: `%s'",
405 optarg);
406 mttl = ultmp;
407 options |= F_MTTL;
408 break;
409 case 't':
410 alarmtimeout = strtoul(optarg, &ep, 0);
411 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
412 errx(EX_USAGE, "invalid timeout: `%s'",
413 optarg);
414 if (alarmtimeout > MAXALARM)
415 errx(EX_USAGE, "invalid timeout: `%s' > %d",
416 optarg, MAXALARM);
417 alarm((int)alarmtimeout);
418 break;
419 case 'v':
420 options |= F_VERBOSE;
421 break;
422 case 'z':
423 options |= F_HDRINCL;
424 ultmp = strtoul(optarg, &ep, 0);
425 if (*ep || ep == optarg || ultmp > MAXTOS)
426 errx(EX_USAGE, "invalid TOS: `%s'", optarg);
427 tos = ultmp;
428 break;
429 default:
430 usage();
431 }
432 }
433
434 if (argc - optind != 1)
435 usage();
436 target = argv[optind];
437
438 switch (options & (F_MASK|F_TIME)) {
439 case 0: break;
440 case F_MASK:
441 icmp_type = ICMP_MASKREQ;
442 icmp_type_rsp = ICMP_MASKREPLY;
443 phdr_len = MASK_LEN;
444 if (!(options & F_QUIET))
445 (void)printf("ICMP_MASKREQ\n");
446 break;
447 case F_TIME:
448 icmp_type = ICMP_TSTAMP;
449 icmp_type_rsp = ICMP_TSTAMPREPLY;
450 phdr_len = TS_LEN;
451 if (!(options & F_QUIET))
452 (void)printf("ICMP_TSTAMP\n");
453 break;
454 default:
455 errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive.");
456 break;
457 }
458 icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len;
459 if (options & F_RROUTE)
460 icmp_len += MAX_IPOPTLEN;
461 maxpayload = IP_MAXPACKET - icmp_len;
462 if (datalen > maxpayload)
463 errx(EX_USAGE, "packet size too large: %d > %d", datalen,
464 maxpayload);
465 send_len = icmp_len + datalen;
466 datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN];
467 if (options & F_PINGFILLED) {
468 fill((char *)datap, payload);
469 }
470 if (source) {
471 bzero((char *)&sock_in, sizeof(sock_in));
472 sock_in.sin_family = AF_INET;
473 if (inet_aton(source, &sock_in.sin_addr) != 0) {
474 shostname = source;
475 } else {
476 hp = gethostbyname2(source, AF_INET);
477 if (!hp)
478 errx(EX_NOHOST, "cannot resolve %s: %s",
479 source, hstrerror(h_errno));
480
481 sock_in.sin_len = sizeof sock_in;
482 if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) ||
483 hp->h_length < 0)
484 errx(1, "gethostbyname2: illegal address");
485 memcpy(&sock_in.sin_addr, hp->h_addr_list[0],
486 sizeof(sock_in.sin_addr));
487 (void)strncpy(snamebuf, hp->h_name,
488 sizeof(snamebuf) - 1);
489 snamebuf[sizeof(snamebuf) - 1] = '\0';
490 shostname = snamebuf;
491 }
492 if (bind(s, (struct sockaddr *)&sock_in, sizeof sock_in) == -1)
493 err(1, "bind");
494 }
495
496 bzero(&whereto, sizeof(whereto));
497 to = &whereto;
498 to->sin_family = AF_INET;
499 to->sin_len = sizeof *to;
500 if (inet_aton(target, &to->sin_addr) != 0) {
501 hostname = target;
502 } else {
503 hp = gethostbyname2(target, AF_INET);
504 if (!hp)
505 errx(EX_NOHOST, "cannot resolve %s: %s",
506 target, hstrerror(h_errno));
507
508 if ((unsigned)hp->h_length > sizeof(to->sin_addr))
509 errx(1, "gethostbyname2 returned an illegal address");
510 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr);
511 (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1);
512 hnamebuf[sizeof(hnamebuf) - 1] = '\0';
513 hostname = hnamebuf;
514 }
515
516 if (options & F_FLOOD && options & F_INTERVAL)
517 errx(EX_USAGE, "-f and -i: incompatible options");
518
519 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
520 errx(EX_USAGE,
521 "-f flag cannot be used with multicast destination");
522 if (options & (F_MIF | F_NOLOOP | F_MTTL)
523 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
524 errx(EX_USAGE,
525 "-I, -L, -T flags cannot be used with unicast destination");
526
527 if (datalen >= TIMEVAL_LEN) /* can we time transfer */
528 timing = 1;
529
530 if (!(options & F_PINGFILLED))
531 for (i = TIMEVAL_LEN; i < datalen; ++i)
532 *datap++ = i;
533
534 ident = getpid() & 0xFFFF;
535
536 if (s < 0) {
537 errno = sockerrno;
538 err(EX_OSERR, "socket");
539 }
540 hold = 1;
541 if (options & F_SO_DEBUG)
542 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
543 sizeof(hold));
544 if (options & F_SO_DONTROUTE)
545 (void)setsockopt(s, SOL_SOCKET, SO_DONTROUTE, (char *)&hold,
546 sizeof(hold));
547 #ifdef IPSEC
548 #ifdef IPSEC_POLICY_IPSEC
549 if (options & F_POLICY) {
550 char *buf;
551 if (policy_in != NULL) {
552 buf = ipsec_set_policy(policy_in, strlen(policy_in));
553 if (buf == NULL)
554 errx(EX_CONFIG, "%s", ipsec_strerror());
555 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY,
556 buf, ipsec_get_policylen(buf)) < 0)
557 err(EX_CONFIG,
558 "ipsec policy cannot be configured");
559 free(buf);
560 }
561
562 if (policy_out != NULL) {
563 buf = ipsec_set_policy(policy_out, strlen(policy_out));
564 if (buf == NULL)
565 errx(EX_CONFIG, "%s", ipsec_strerror());
566 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY,
567 buf, ipsec_get_policylen(buf)) < 0)
568 err(EX_CONFIG,
569 "ipsec policy cannot be configured");
570 free(buf);
571 }
572 }
573 #endif /*IPSEC_POLICY_IPSEC*/
574 #endif /*IPSEC*/
575
576 if (options & F_HDRINCL) {
577 ip = (struct ip*)outpackhdr;
578 if (!(options & (F_TTL | F_MTTL))) {
579 mib[0] = CTL_NET;
580 mib[1] = PF_INET;
581 mib[2] = IPPROTO_IP;
582 mib[3] = IPCTL_DEFTTL;
583 sz = sizeof(ttl);
584 if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1)
585 err(1, "sysctl(net.inet.ip.ttl)");
586 }
587 setsockopt(s, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold));
588 ip->ip_v = IPVERSION;
589 ip->ip_hl = sizeof(struct ip) >> 2;
590 ip->ip_tos = tos;
591 ip->ip_id = 0;
592 ip->ip_off = df ? IP_DF : 0;
593 ip->ip_ttl = ttl;
594 ip->ip_p = IPPROTO_ICMP;
595 ip->ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY;
596 ip->ip_dst = to->sin_addr;
597 }
598 /* record route option */
599 if (options & F_RROUTE) {
600 #ifdef IP_OPTIONS
601 bzero(rspace, sizeof(rspace));
602 rspace[IPOPT_OPTVAL] = IPOPT_RR;
603 rspace[IPOPT_OLEN] = sizeof(rspace) - 1;
604 rspace[IPOPT_OFFSET] = IPOPT_MINOFF;
605 rspace[sizeof(rspace) - 1] = IPOPT_EOL;
606 if (setsockopt(s, IPPROTO_IP, IP_OPTIONS, rspace,
607 sizeof(rspace)) < 0)
608 err(EX_OSERR, "setsockopt IP_OPTIONS");
609 #else
610 errx(EX_UNAVAILABLE,
611 "record route not available in this implementation");
612 #endif /* IP_OPTIONS */
613 }
614
615 if (options & F_TTL) {
616 if (setsockopt(s, IPPROTO_IP, IP_TTL, &ttl,
617 sizeof(ttl)) < 0) {
618 err(EX_OSERR, "setsockopt IP_TTL");
619 }
620 }
621 if (options & F_NOLOOP) {
622 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &loop,
623 sizeof(loop)) < 0) {
624 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP");
625 }
626 }
627 if (options & F_MTTL) {
628 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &mttl,
629 sizeof(mttl)) < 0) {
630 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL");
631 }
632 }
633 if (options & F_MIF) {
634 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr,
635 sizeof(ifaddr)) < 0) {
636 err(EX_OSERR, "setsockopt IP_MULTICAST_IF");
637 }
638 }
639 #ifdef SO_TIMESTAMP
640 { int on = 1;
641 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)) < 0)
642 err(EX_OSERR, "setsockopt SO_TIMESTAMP");
643 }
644 #endif
645
646 /*
647 * When pinging the broadcast address, you can get a lot of answers.
648 * Doing something so evil is useful if you are trying to stress the
649 * ethernet, or just want to fill the arp cache to get some stuff for
650 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast
651 * or multicast pings if they wish.
652 */
653
654 /*
655 * XXX receive buffer needs undetermined space for mbuf overhead
656 * as well.
657 */
658 hold = IP_MAXPACKET + 128;
659 (void)setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
660 sizeof(hold));
661 if (uid == 0)
662 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char *)&hold,
663 sizeof(hold));
664
665 if (to->sin_family == AF_INET) {
666 (void)printf("PING %s (%s)", hostname,
667 inet_ntoa(to->sin_addr));
668 if (source)
669 (void)printf(" from %s", shostname);
670 (void)printf(": %d data bytes\n", datalen);
671 } else
672 (void)printf("PING %s: %d data bytes\n", hostname, datalen);
673
674 /*
675 * Use sigaction() instead of signal() to get unambiguous semantics,
676 * in particular with SA_RESTART not set.
677 */
678
679 sigemptyset(&si_sa.sa_mask);
680 si_sa.sa_flags = 0;
681
682 si_sa.sa_handler = stopit;
683 if (sigaction(SIGINT, &si_sa, 0) == -1) {
684 err(EX_OSERR, "sigaction SIGINT");
685 }
686
687 si_sa.sa_handler = status;
688 if (sigaction(SIGINFO, &si_sa, 0) == -1) {
689 err(EX_OSERR, "sigaction");
690 }
691
692 if (alarmtimeout > 0) {
693 si_sa.sa_handler = stopit;
694 if (sigaction(SIGALRM, &si_sa, 0) == -1)
695 err(EX_OSERR, "sigaction SIGALRM");
696 }
697
698 bzero(&msg, sizeof(msg));
699 msg.msg_name = (caddr_t)&from;
700 msg.msg_iov = &iov;
701 msg.msg_iovlen = 1;
702 #ifdef SO_TIMESTAMP
703 msg.msg_control = (caddr_t)ctrl;
704 #endif
705 iov.iov_base = packet;
706 iov.iov_len = IP_MAXPACKET;
707
708 if (preload == 0)
709 pinger(); /* send the first ping */
710 else {
711 if (npackets != 0 && preload > npackets)
712 preload = npackets;
713 while (preload--) /* fire off them quickies */
714 pinger();
715 }
716 (void)gettimeofday(&last, NULL);
717
718 if (options & F_FLOOD) {
719 intvl.tv_sec = 0;
720 intvl.tv_usec = 10000;
721 } else {
722 intvl.tv_sec = interval / 1000;
723 intvl.tv_usec = interval % 1000 * 1000;
724 }
725
726 almost_done = 0;
727 while (!finish_up) {
728 struct timeval now, timeout;
729 fd_set rfds;
730 int cc, n;
731
732 check_status();
733 if ((unsigned)s >= FD_SETSIZE)
734 errx(EX_OSERR, "descriptor too large");
735 FD_ZERO(&rfds);
736 FD_SET(s, &rfds);
737 (void)gettimeofday(&now, NULL);
738 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
739 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
740 while (timeout.tv_usec < 0) {
741 timeout.tv_usec += 1000000;
742 timeout.tv_sec--;
743 }
744 while (timeout.tv_usec >= 1000000) {
745 timeout.tv_usec -= 1000000;
746 timeout.tv_sec++;
747 }
748 if (timeout.tv_sec < 0)
749 timeout.tv_sec = timeout.tv_usec = 0;
750 n = select(s + 1, &rfds, NULL, NULL, &timeout);
751 if (n < 0)
752 continue; /* Must be EINTR. */
753 if (n == 1) {
754 struct timeval *tv = NULL;
755 #ifdef SO_TIMESTAMP
756 struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl;
757
758 msg.msg_controllen = sizeof(ctrl);
759 #endif
760 msg.msg_namelen = sizeof(from);
761 if ((cc = recvmsg(s, &msg, 0)) < 0) {
762 if (errno == EINTR)
763 continue;
764 warn("recvmsg");
765 continue;
766 }
767 #ifdef SO_TIMESTAMP
768 if (cmsg->cmsg_level == SOL_SOCKET &&
769 cmsg->cmsg_type == SCM_TIMESTAMP &&
770 cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) {
771 /* Copy to avoid alignment problems: */
772 memcpy(&now, CMSG_DATA(cmsg), sizeof(now));
773 tv = &now;
774 }
775 #endif
776 if (tv == NULL) {
777 (void)gettimeofday(&now, NULL);
778 tv = &now;
779 }
780 pr_pack((char *)packet, cc, &from, tv);
781 if ((options & F_ONCE && nreceived) ||
782 (npackets && nreceived >= npackets))
783 break;
784 }
785 if (n == 0 || options & F_FLOOD) {
786 if (!npackets || ntransmitted < npackets)
787 pinger();
788 else {
789 if (almost_done)
790 break;
791 almost_done = 1;
792 intvl.tv_usec = 0;
793 if (nreceived) {
794 intvl.tv_sec = 2 * tmax / 1000;
795 if (!intvl.tv_sec)
796 intvl.tv_sec = 1;
797 } else
798 intvl.tv_sec = MAXWAIT;
799 }
800 (void)gettimeofday(&last, NULL);
801 if (ntransmitted - nreceived - 1 > nmissedmax) {
802 nmissedmax = ntransmitted - nreceived - 1;
803 if (options & F_MISSED)
804 (void)write(STDOUT_FILENO, &BBELL, 1);
805 }
806 }
807 }
808 finish();
809 /* NOTREACHED */
810 exit(0); /* Make the compiler happy */
811 }
812
813 /*
814 * stopit --
815 * Set the global bit that causes the main loop to quit.
816 * Do NOT call finish() from here, since finish() does far too much
817 * to be called from a signal handler.
818 */
819 void
820 stopit(sig)
821 int sig __unused;
822 {
823
824 /*
825 * When doing reverse DNS lookups, the finish_up flag might not
826 * be noticed for a while. Just exit if we get a second SIGINT.
827 */
828 if (!(options & F_NUMERIC) && finish_up)
829 _exit(nreceived ? 0 : 2);
830 finish_up = 1;
831 }
832
833 /*
834 * pinger --
835 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
836 * will be added on by the kernel. The ID field is our UNIX process ID,
837 * and the sequence number is an ascending integer. The first TIMEVAL_LEN
838 * bytes of the data portion are used to hold a UNIX "timeval" struct in
839 * host byte-order, to compute the round-trip time.
840 */
841 static void
842 pinger(void)
843 {
844 struct timeval now;
845 struct ip *ip;
846 struct icmp *icp;
847 int cc, i;
848 u_char *packet;
849
850 packet = outpack;
851 icp = (struct icmp *)outpack;
852 icp->icmp_type = icmp_type;
853 icp->icmp_code = 0;
854 icp->icmp_cksum = 0;
855 icp->icmp_seq = htons(ntransmitted);
856 icp->icmp_id = ident; /* ID */
857
858 CLR(ntransmitted % mx_dup_ck);
859
860 if ((options & F_TIME) || timing) {
861 (void)gettimeofday(&now, NULL);
862
863 if (options & F_TIME)
864 icp->icmp_otime = htonl((now.tv_sec % (24*60*60))
865 * 1000 + now.tv_usec / 1000);
866 if (timing)
867 bcopy((void *)&now,
868 (void *)&outpack[ICMP_MINLEN + phdr_len],
869 sizeof(struct timeval));
870 }
871
872 cc = ICMP_MINLEN + phdr_len + datalen;
873
874 /* compute ICMP checksum here */
875 icp->icmp_cksum = in_cksum((u_short *)icp, cc);
876
877 if (options & F_HDRINCL) {
878 cc += sizeof(struct ip);
879 ip = (struct ip *)outpackhdr;
880 ip->ip_len = cc;
881 ip->ip_sum = in_cksum((u_short *)outpackhdr, cc);
882 packet = outpackhdr;
883 }
884 i = sendto(s, (char *)packet, cc, 0, (struct sockaddr *)&whereto,
885 sizeof(whereto));
886
887 if (i < 0 || i != cc) {
888 if (i < 0) {
889 if (options & F_FLOOD && errno == ENOBUFS) {
890 usleep(FLOOD_BACKOFF);
891 return;
892 }
893 warn("sendto");
894 } else {
895 warn("%s: partial write: %d of %d bytes",
896 hostname, i, cc);
897 }
898 }
899 ntransmitted++;
900 if (!(options & F_QUIET) && options & F_FLOOD)
901 (void)write(STDOUT_FILENO, &DOT, 1);
902 }
903
904 /*
905 * pr_pack --
906 * Print out the packet, if it came from us. This logic is necessary
907 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
908 * which arrive ('tis only fair). This permits multiple copies of this
909 * program to be run without having intermingled output (or statistics!).
910 */
911 static void
912 pr_pack(buf, cc, from, tv)
913 char *buf;
914 int cc;
915 struct sockaddr_in *from;
916 struct timeval *tv;
917 {
918 struct in_addr ina;
919 u_char *cp, *dp;
920 struct icmp *icp;
921 struct ip *ip;
922 const void *tp;
923 double triptime;
924 int dupflag, hlen, i, j, recv_len, seq;
925 static int old_rrlen;
926 static char old_rr[MAX_IPOPTLEN];
927
928 /* Check the IP header */
929 ip = (struct ip *)buf;
930 hlen = ip->ip_hl << 2;
931 recv_len = cc;
932 if (cc < hlen + ICMP_MINLEN) {
933 if (options & F_VERBOSE)
934 warn("packet too short (%d bytes) from %s", cc,
935 inet_ntoa(from->sin_addr));
936 return;
937 }
938
939 /* Now the ICMP part */
940 cc -= hlen;
941 icp = (struct icmp *)(buf + hlen);
942 if (icp->icmp_type == icmp_type_rsp) {
943 if (icp->icmp_id != ident)
944 return; /* 'Twas not our ECHO */
945 ++nreceived;
946 triptime = 0.0;
947 if (timing) {
948 struct timeval tv1;
949 #ifndef icmp_data
950 tp = &icp->icmp_ip;
951 #else
952 tp = icp->icmp_data;
953 #endif
954 tp = (const char *)tp + phdr_len;
955
956 if (cc - ICMP_MINLEN - phdr_len >= sizeof(tv1)) {
957 /* Copy to avoid alignment problems: */
958 memcpy(&tv1, tp, sizeof(tv1));
959 tvsub(tv, &tv1);
960 triptime = ((double)tv->tv_sec) * 1000.0 +
961 ((double)tv->tv_usec) / 1000.0;
962 tsum += triptime;
963 tsumsq += triptime * triptime;
964 if (triptime < tmin)
965 tmin = triptime;
966 if (triptime > tmax)
967 tmax = triptime;
968 } else
969 timing = 0;
970 }
971
972 seq = ntohs(icp->icmp_seq);
973
974 if (TST(seq % mx_dup_ck)) {
975 ++nrepeats;
976 --nreceived;
977 dupflag = 1;
978 } else {
979 SET(seq % mx_dup_ck);
980 dupflag = 0;
981 }
982
983 if (options & F_QUIET)
984 return;
985
986 if (options & F_FLOOD)
987 (void)write(STDOUT_FILENO, &BSPACE, 1);
988 else {
989 (void)printf("%d bytes from %s: icmp_seq=%u", cc,
990 inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr),
991 seq);
992 (void)printf(" ttl=%d", ip->ip_ttl);
993 if (timing)
994 (void)printf(" time=%.3f ms", triptime);
995 if (dupflag)
996 (void)printf(" (DUP!)");
997 if (options & F_AUDIBLE)
998 (void)write(STDOUT_FILENO, &BBELL, 1);
999 if (options & F_MASK) {
1000 /* Just prentend this cast isn't ugly */
1001 (void)printf(" mask=%s",
1002 pr_addr(*(struct in_addr *)&(icp->icmp_mask)));
1003 }
1004 if (options & F_TIME) {
1005 (void)printf(" tso=%s", pr_ntime(icp->icmp_otime));
1006 (void)printf(" tsr=%s", pr_ntime(icp->icmp_rtime));
1007 (void)printf(" tst=%s", pr_ntime(icp->icmp_ttime));
1008 }
1009 if (recv_len != send_len) {
1010 (void)printf(
1011 "\nwrong total length %d instead of %d",
1012 recv_len, send_len);
1013 }
1014 /* check the data */
1015 cp = (u_char*)&icp->icmp_data[phdr_len];
1016 dp = &outpack[ICMP_MINLEN + phdr_len];
1017 cc -= ICMP_MINLEN + phdr_len;
1018 i = 0;
1019 if (timing) { /* don't check variable timestamp */
1020 cp += TIMEVAL_LEN;
1021 dp += TIMEVAL_LEN;
1022 cc -= TIMEVAL_LEN;
1023 i += TIMEVAL_LEN;
1024 }
1025 for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) {
1026 if (*cp != *dp) {
1027 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x",
1028 i, *dp, *cp);
1029 (void)printf("\ncp:");
1030 cp = (u_char*)&icp->icmp_data[0];
1031 for (i = 0; i < datalen; ++i, ++cp) {
1032 if ((i % 16) == 8)
1033 (void)printf("\n\t");
1034 (void)printf("%2x ", *cp);
1035 }
1036 (void)printf("\ndp:");
1037 cp = &outpack[ICMP_MINLEN];
1038 for (i = 0; i < datalen; ++i, ++cp) {
1039 if ((i % 16) == 8)
1040 (void)printf("\n\t");
1041 (void)printf("%2x ", *cp);
1042 }
1043 break;
1044 }
1045 }
1046 }
1047 } else {
1048 /*
1049 * We've got something other than an ECHOREPLY.
1050 * See if it's a reply to something that we sent.
1051 * We can compare IP destination, protocol,
1052 * and ICMP type and ID.
1053 *
1054 * Only print all the error messages if we are running
1055 * as root to avoid leaking information not normally
1056 * available to those not running as root.
1057 */
1058 #ifndef icmp_data
1059 struct ip *oip = &icp->icmp_ip;
1060 #else
1061 struct ip *oip = (struct ip *)icp->icmp_data;
1062 #endif
1063 struct icmp *oicmp = (struct icmp *)(oip + 1);
1064
1065 if (((options & F_VERBOSE) && uid == 0) ||
1066 (!(options & F_QUIET2) &&
1067 (oip->ip_dst.s_addr == whereto.sin_addr.s_addr) &&
1068 (oip->ip_p == IPPROTO_ICMP) &&
1069 (oicmp->icmp_type == ICMP_ECHO) &&
1070 (oicmp->icmp_id == ident))) {
1071 (void)printf("%d bytes from %s: ", cc,
1072 pr_addr(from->sin_addr));
1073 pr_icmph(icp);
1074 } else
1075 return;
1076 }
1077
1078 /* Display any IP options */
1079 cp = (u_char *)buf + sizeof(struct ip);
1080
1081 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp)
1082 switch (*cp) {
1083 case IPOPT_EOL:
1084 hlen = 0;
1085 break;
1086 case IPOPT_LSRR:
1087 case IPOPT_SSRR:
1088 (void)printf(*cp == IPOPT_LSRR ?
1089 "\nLSRR: " : "\nSSRR: ");
1090 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1;
1091 hlen -= 2;
1092 cp += 2;
1093 if (j >= INADDR_LEN &&
1094 j <= hlen - (int)sizeof(struct ip)) {
1095 for (;;) {
1096 bcopy(++cp, &ina.s_addr, INADDR_LEN);
1097 if (ina.s_addr == 0)
1098 (void)printf("\t0.0.0.0");
1099 else
1100 (void)printf("\t%s",
1101 pr_addr(ina));
1102 hlen -= INADDR_LEN;
1103 cp += INADDR_LEN - 1;
1104 j -= INADDR_LEN;
1105 if (j < INADDR_LEN)
1106 break;
1107 (void)putchar('\n');
1108 }
1109 } else
1110 (void)printf("\t(truncated route)\n");
1111 break;
1112 case IPOPT_RR:
1113 j = cp[IPOPT_OLEN]; /* get length */
1114 i = cp[IPOPT_OFFSET]; /* and pointer */
1115 hlen -= 2;
1116 cp += 2;
1117 if (i > j)
1118 i = j;
1119 i = i - IPOPT_MINOFF + 1;
1120 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) {
1121 old_rrlen = 0;
1122 continue;
1123 }
1124 if (i == old_rrlen
1125 && !bcmp((char *)cp, old_rr, i)
1126 && !(options & F_FLOOD)) {
1127 (void)printf("\t(same route)");
1128 hlen -= i;
1129 cp += i;
1130 break;
1131 }
1132 old_rrlen = i;
1133 bcopy((char *)cp, old_rr, i);
1134 (void)printf("\nRR: ");
1135 if (i >= INADDR_LEN &&
1136 i <= hlen - (int)sizeof(struct ip)) {
1137 for (;;) {
1138 bcopy(++cp, &ina.s_addr, INADDR_LEN);
1139 if (ina.s_addr == 0)
1140 (void)printf("\t0.0.0.0");
1141 else
1142 (void)printf("\t%s",
1143 pr_addr(ina));
1144 hlen -= INADDR_LEN;
1145 cp += INADDR_LEN - 1;
1146 i -= INADDR_LEN;
1147 if (i < INADDR_LEN)
1148 break;
1149 (void)putchar('\n');
1150 }
1151 } else
1152 (void)printf("\t(truncated route)");
1153 break;
1154 case IPOPT_NOP:
1155 (void)printf("\nNOP");
1156 break;
1157 default:
1158 (void)printf("\nunknown option %x", *cp);
1159 break;
1160 }
1161 if (!(options & F_FLOOD)) {
1162 (void)putchar('\n');
1163 (void)fflush(stdout);
1164 }
1165 }
1166
1167 /*
1168 * in_cksum --
1169 * Checksum routine for Internet Protocol family headers (C Version)
1170 */
1171 u_short
1172 in_cksum(addr, len)
1173 u_short *addr;
1174 int len;
1175 {
1176 int nleft, sum;
1177 u_short *w;
1178 union {
1179 u_short us;
1180 u_char uc[2];
1181 } last;
1182 u_short answer;
1183
1184 nleft = len;
1185 sum = 0;
1186 w = addr;
1187
1188 /*
1189 * Our algorithm is simple, using a 32 bit accumulator (sum), we add
1190 * sequential 16 bit words to it, and at the end, fold back all the
1191 * carry bits from the top 16 bits into the lower 16 bits.
1192 */
1193 while (nleft > 1) {
1194 sum += *w++;
1195 nleft -= 2;
1196 }
1197
1198 /* mop up an odd byte, if necessary */
1199 if (nleft == 1) {
1200 last.uc[0] = *(u_char *)w;
1201 last.uc[1] = 0;
1202 sum += last.us;
1203 }
1204
1205 /* add back carry outs from top 16 bits to low 16 bits */
1206 sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */
1207 sum += (sum >> 16); /* add carry */
1208 answer = ~sum; /* truncate to 16 bits */
1209 return(answer);
1210 }
1211
1212 /*
1213 * tvsub --
1214 * Subtract 2 timeval structs: out = out - in. Out is assumed to
1215 * be >= in.
1216 */
1217 static void
1218 tvsub(out, in)
1219 struct timeval *out, *in;
1220 {
1221
1222 if ((out->tv_usec -= in->tv_usec) < 0) {
1223 --out->tv_sec;
1224 out->tv_usec += 1000000;
1225 }
1226 out->tv_sec -= in->tv_sec;
1227 }
1228
1229 /*
1230 * status --
1231 * Print out statistics when SIGINFO is received.
1232 */
1233
1234 static void
1235 status(sig)
1236 int sig __unused;
1237 {
1238
1239 siginfo_p = 1;
1240 }
1241
1242 static void
1243 check_status()
1244 {
1245
1246 if (siginfo_p) {
1247 siginfo_p = 0;
1248 (void)fprintf(stderr, "\r%ld/%ld packets received (%.0f%%)",
1249 nreceived, ntransmitted,
1250 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0);
1251 if (nreceived && timing)
1252 (void)fprintf(stderr, " %.3f min / %.3f avg / %.3f max",
1253 tmin, tsum / (nreceived + nrepeats), tmax);
1254 (void)fprintf(stderr, "\n");
1255 }
1256 }
1257
1258 /*
1259 * finish --
1260 * Print out statistics, and give up.
1261 */
1262 static void
1263 finish()
1264 {
1265
1266 (void)signal(SIGINT, SIG_IGN);
1267 (void)signal(SIGALRM, SIG_IGN);
1268 (void)putchar('\n');
1269 (void)fflush(stdout);
1270 (void)printf("--- %s ping statistics ---\n", hostname);
1271 (void)printf("%ld packets transmitted, ", ntransmitted);
1272 (void)printf("%ld packets received, ", nreceived);
1273 if (nrepeats)
1274 (void)printf("+%ld duplicates, ", nrepeats);
1275 if (ntransmitted) {
1276 if (nreceived > ntransmitted)
1277 (void)printf("-- somebody's printing up packets!");
1278 else
1279 (void)printf("%d%% packet loss",
1280 (int)(((ntransmitted - nreceived) * 100) /
1281 ntransmitted));
1282 }
1283 (void)putchar('\n');
1284 if (nreceived && timing) {
1285 double n = nreceived + nrepeats;
1286 double avg = tsum / n;
1287 double vari = tsumsq / n - avg * avg;
1288 (void)printf(
1289 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n",
1290 tmin, avg, tmax, sqrt(vari));
1291 }
1292
1293 if (nreceived)
1294 exit(0);
1295 else
1296 exit(2);
1297 }
1298
1299 #ifdef notdef
1300 static char *ttab[] = {
1301 "Echo Reply", /* ip + seq + udata */
1302 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */
1303 "Source Quench", /* IP */
1304 "Redirect", /* redirect type, gateway, + IP */
1305 "Echo",
1306 "Time Exceeded", /* transit, frag reassem + IP */
1307 "Parameter Problem", /* pointer + IP */
1308 "Timestamp", /* id + seq + three timestamps */
1309 "Timestamp Reply", /* " */
1310 "Info Request", /* id + sq */
1311 "Info Reply" /* " */
1312 };
1313 #endif
1314
1315 /*
1316 * pr_icmph --
1317 * Print a descriptive string about an ICMP header.
1318 */
1319 static void
1320 pr_icmph(icp)
1321 struct icmp *icp;
1322 {
1323
1324 switch(icp->icmp_type) {
1325 case ICMP_ECHOREPLY:
1326 (void)printf("Echo Reply\n");
1327 /* XXX ID + Seq + Data */
1328 break;
1329 case ICMP_UNREACH:
1330 switch(icp->icmp_code) {
1331 case ICMP_UNREACH_NET:
1332 (void)printf("Destination Net Unreachable\n");
1333 break;
1334 case ICMP_UNREACH_HOST:
1335 (void)printf("Destination Host Unreachable\n");
1336 break;
1337 case ICMP_UNREACH_PROTOCOL:
1338 (void)printf("Destination Protocol Unreachable\n");
1339 break;
1340 case ICMP_UNREACH_PORT:
1341 (void)printf("Destination Port Unreachable\n");
1342 break;
1343 case ICMP_UNREACH_NEEDFRAG:
1344 (void)printf("frag needed and DF set (MTU %d)\n",
1345 ntohs(icp->icmp_nextmtu));
1346 break;
1347 case ICMP_UNREACH_SRCFAIL:
1348 (void)printf("Source Route Failed\n");
1349 break;
1350 case ICMP_UNREACH_FILTER_PROHIB:
1351 (void)printf("Communication prohibited by filter\n");
1352 break;
1353 default:
1354 (void)printf("Dest Unreachable, Bad Code: %d\n",
1355 icp->icmp_code);
1356 break;
1357 }
1358 /* Print returned IP header information */
1359 #ifndef icmp_data
1360 pr_retip(&icp->icmp_ip);
1361 #else
1362 pr_retip((struct ip *)icp->icmp_data);
1363 #endif
1364 break;
1365 case ICMP_SOURCEQUENCH:
1366 (void)printf("Source Quench\n");
1367 #ifndef icmp_data
1368 pr_retip(&icp->icmp_ip);
1369 #else
1370 pr_retip((struct ip *)icp->icmp_data);
1371 #endif
1372 break;
1373 case ICMP_REDIRECT:
1374 switch(icp->icmp_code) {
1375 case ICMP_REDIRECT_NET:
1376 (void)printf("Redirect Network");
1377 break;
1378 case ICMP_REDIRECT_HOST:
1379 (void)printf("Redirect Host");
1380 break;
1381 case ICMP_REDIRECT_TOSNET:
1382 (void)printf("Redirect Type of Service and Network");
1383 break;
1384 case ICMP_REDIRECT_TOSHOST:
1385 (void)printf("Redirect Type of Service and Host");
1386 break;
1387 default:
1388 (void)printf("Redirect, Bad Code: %d", icp->icmp_code);
1389 break;
1390 }
1391 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr));
1392 #ifndef icmp_data
1393 pr_retip(&icp->icmp_ip);
1394 #else
1395 pr_retip((struct ip *)icp->icmp_data);
1396 #endif
1397 break;
1398 case ICMP_ECHO:
1399 (void)printf("Echo Request\n");
1400 /* XXX ID + Seq + Data */
1401 break;
1402 case ICMP_TIMXCEED:
1403 switch(icp->icmp_code) {
1404 case ICMP_TIMXCEED_INTRANS:
1405 (void)printf("Time to live exceeded\n");
1406 break;
1407 case ICMP_TIMXCEED_REASS:
1408 (void)printf("Frag reassembly time exceeded\n");
1409 break;
1410 default:
1411 (void)printf("Time exceeded, Bad Code: %d\n",
1412 icp->icmp_code);
1413 break;
1414 }
1415 #ifndef icmp_data
1416 pr_retip(&icp->icmp_ip);
1417 #else
1418 pr_retip((struct ip *)icp->icmp_data);
1419 #endif
1420 break;
1421 case ICMP_PARAMPROB:
1422 (void)printf("Parameter problem: pointer = 0x%02x\n",
1423 icp->icmp_hun.ih_pptr);
1424 #ifndef icmp_data
1425 pr_retip(&icp->icmp_ip);
1426 #else
1427 pr_retip((struct ip *)icp->icmp_data);
1428 #endif
1429 break;
1430 case ICMP_TSTAMP:
1431 (void)printf("Timestamp\n");
1432 /* XXX ID + Seq + 3 timestamps */
1433 break;
1434 case ICMP_TSTAMPREPLY:
1435 (void)printf("Timestamp Reply\n");
1436 /* XXX ID + Seq + 3 timestamps */
1437 break;
1438 case ICMP_IREQ:
1439 (void)printf("Information Request\n");
1440 /* XXX ID + Seq */
1441 break;
1442 case ICMP_IREQREPLY:
1443 (void)printf("Information Reply\n");
1444 /* XXX ID + Seq */
1445 break;
1446 case ICMP_MASKREQ:
1447 (void)printf("Address Mask Request\n");
1448 break;
1449 case ICMP_MASKREPLY:
1450 (void)printf("Address Mask Reply\n");
1451 break;
1452 case ICMP_ROUTERADVERT:
1453 (void)printf("Router Advertisement\n");
1454 break;
1455 case ICMP_ROUTERSOLICIT:
1456 (void)printf("Router Solicitation\n");
1457 break;
1458 default:
1459 (void)printf("Bad ICMP type: %d\n", icp->icmp_type);
1460 }
1461 }
1462
1463 /*
1464 * pr_iph --
1465 * Print an IP header with options.
1466 */
1467 static void
1468 pr_iph(ip)
1469 struct ip *ip;
1470 {
1471 u_char *cp;
1472 int hlen;
1473
1474 hlen = ip->ip_hl << 2;
1475 cp = (u_char *)ip + 20; /* point to options */
1476
1477 (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n");
1478 (void)printf(" %1x %1x %02x %04x %04x",
1479 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len),
1480 ntohs(ip->ip_id));
1481 (void)printf(" %1lx %04lx",
1482 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13,
1483 (u_long) ntohl(ip->ip_off) & 0x1fff);
1484 (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p,
1485 ntohs(ip->ip_sum));
1486 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr));
1487 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr));
1488 /* dump any option bytes */
1489 while (hlen-- > 20) {
1490 (void)printf("%02x", *cp++);
1491 }
1492 (void)putchar('\n');
1493 }
1494
1495 /*
1496 * pr_addr --
1497 * Return an ascii host address as a dotted quad and optionally with
1498 * a hostname.
1499 */
1500 static char *
1501 pr_addr(ina)
1502 struct in_addr ina;
1503 {
1504 struct hostent *hp;
1505 static char buf[16 + 3 + MAXHOSTNAMELEN];
1506
1507 if ((options & F_NUMERIC) ||
1508 !(hp = gethostbyaddr((char *)&ina, 4, AF_INET)))
1509 return inet_ntoa(ina);
1510 else
1511 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name,
1512 inet_ntoa(ina));
1513 return(buf);
1514 }
1515
1516 /*
1517 * pr_retip --
1518 * Dump some info on a returned (via ICMP) IP packet.
1519 */
1520 static void
1521 pr_retip(ip)
1522 struct ip *ip;
1523 {
1524 u_char *cp;
1525 int hlen;
1526
1527 pr_iph(ip);
1528 hlen = ip->ip_hl << 2;
1529 cp = (u_char *)ip + hlen;
1530
1531 if (ip->ip_p == 6)
1532 (void)printf("TCP: from port %u, to port %u (decimal)\n",
1533 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
1534 else if (ip->ip_p == 17)
1535 (void)printf("UDP: from port %u, to port %u (decimal)\n",
1536 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
1537 }
1538
1539 static char *
1540 pr_ntime (n_time timestamp)
1541 {
1542 static char buf[10];
1543 int hour, min, sec;
1544
1545 sec = ntohl(timestamp) / 1000;
1546 hour = sec / 60 / 60;
1547 min = (sec % (60 * 60)) / 60;
1548 sec = (sec % (60 * 60)) % 60;
1549
1550 (void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec);
1551
1552 return (buf);
1553 }
1554
1555 static void
1556 fill(bp, patp)
1557 char *bp, *patp;
1558 {
1559 char *cp;
1560 int pat[16];
1561 u_int ii, jj, kk;
1562
1563 for (cp = patp; *cp; cp++) {
1564 if (!isxdigit(*cp))
1565 errx(EX_USAGE,
1566 "patterns must be specified as hex digits");
1567
1568 }
1569 ii = sscanf(patp,
1570 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
1571 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
1572 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
1573 &pat[13], &pat[14], &pat[15]);
1574
1575 if (ii > 0)
1576 for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii)
1577 for (jj = 0; jj < ii; ++jj)
1578 bp[jj + kk] = pat[jj];
1579 if (!(options & F_QUIET)) {
1580 (void)printf("PATTERN: 0x");
1581 for (jj = 0; jj < ii; ++jj)
1582 (void)printf("%02x", bp[jj] & 0xFF);
1583 (void)printf("\n");
1584 }
1585 }
1586
1587 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
1588 #define SECOPT " [-P policy]"
1589 #else
1590 #define SECOPT ""
1591 #endif
1592 static void
1593 usage()
1594 {
1595
1596 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n",
1597 "usage: ping [-AaDdfnoQqRrv] [-c count] [-i wait] [-l preload] [-M mask | time]",
1598 " [-m ttl]" SECOPT " [-p pattern] [-S src_addr] [-s packetsize]",
1599 " [-t timeout] [-z tos] host",
1600 " ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]",
1601 " [-M mask | time] [-m ttl]" SECOPT " [-p pattern] [-S src_addr]",
1602 " [-s packetsize] [-T ttl] [-t timeout] [-z tos] mcast-group");
1603 exit(EX_USAGE);
1604 }
mirror of network_cmds