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Clear the direction flag (CLD) on entry to the kernel, to support future
[dragonfly.git] / sbin / ping / ping.c
blob2f639a8cd77bedf614f474f6c28165688442754a
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 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved.
33 * @(#)ping.c 8.1 (Berkeley) 6/5/93
34 * $FreeBSD: src/sbin/ping/ping.c,v 1.111 2007/05/21 14:38:45 cognet Exp $
35 * $DragonFly: src/sbin/ping/ping.c,v 1.7 2007/05/29 10:21:41 hasso Exp $
36 */
37
38 /*
39 * P I N G . C
40 *
41 * Using the Internet Control Message Protocol (ICMP) "ECHO" facility,
42 * measure round-trip-delays and packet loss across network paths.
43 *
44 * Author -
45 * Mike Muuss
46 * U. S. Army Ballistic Research Laboratory
47 * December, 1983
48 *
49 * Status -
50 * Public Domain. Distribution Unlimited.
51 * Bugs -
52 * More statistics could always be gathered.
53 * This program has to run SUID to ROOT to access the ICMP socket.
54 */
55
56 #include <sys/param.h> /* NB: we rely on this for <sys/types.h> */
57 #include <sys/socket.h>
58 #include <sys/sysctl.h>
59 #include <sys/time.h>
60 #include <sys/uio.h>
61
62 #include <netinet/in.h>
63 #include <netinet/in_systm.h>
64 #include <netinet/ip.h>
65 #include <netinet/ip_icmp.h>
66 #include <netinet/ip_var.h>
67 #include <arpa/inet.h>
68
69 #ifdef IPSEC
70 #include <netinet6/ipsec.h>
71 #endif /*IPSEC*/
72
73 #include <ctype.h>
74 #include <err.h>
75 #include <errno.h>
76 #include <math.h>
77 #include <netdb.h>
78 #include <signal.h>
79 #include <stdio.h>
80 #include <stdlib.h>
81 #include <string.h>
82 #include <sysexits.h>
83 #include <unistd.h>
84
85 #define INADDR_LEN ((int)sizeof(in_addr_t))
86 #define TIMEVAL_LEN ((int)sizeof(struct tv32))
87 #define MASK_LEN (ICMP_MASKLEN - ICMP_MINLEN)
88 #define TS_LEN (ICMP_TSLEN - ICMP_MINLEN)
89 #define DEFDATALEN 56 /* default data length */
90 #define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */
91 /* runs out of buffer space */
92 #define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN)
93 #define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN)
94 #define MAXWAIT 10000 /* max ms to wait for response */
95 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */
96 #define MAXTOS 255
97
98 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
99 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
100 #define SET(bit) (A(bit) |= B(bit))
101 #define CLR(bit) (A(bit) &= (~B(bit)))
102 #define TST(bit) (A(bit) & B(bit))
103
104 struct tv32 {
105 int32_t tv32_sec;
106 int32_t tv32_usec;
107 };
108
109 /* various options */
110 int options;
111 #define F_FLOOD 0x0001
112 #define F_INTERVAL 0x0002
113 #define F_NUMERIC 0x0004
114 #define F_PINGFILLED 0x0008
115 #define F_QUIET 0x0010
116 #define F_RROUTE 0x0020
117 #define F_SO_DEBUG 0x0040
118 #define F_SO_DONTROUTE 0x0080
119 #define F_VERBOSE 0x0100
120 #define F_QUIET2 0x0200
121 #define F_NOLOOP 0x0400
122 #define F_MTTL 0x0800
123 #define F_MIF 0x1000
124 #define F_AUDIBLE 0x2000
125 #ifdef IPSEC
126 #ifdef IPSEC_POLICY_IPSEC
127 #define F_POLICY 0x4000
128 #endif /*IPSEC_POLICY_IPSEC*/
129 #endif /*IPSEC*/
130 #define F_TTL 0x8000
131 #define F_MISSED 0x10000
132 #define F_ONCE 0x20000
133 #define F_HDRINCL 0x40000
134 #define F_MASK 0x80000
135 #define F_TIME 0x100000
136 #define F_SWEEP 0x200000
137 #define F_WAITTIME 0x400000
138
139 /*
140 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
141 * number of received sequence numbers we can keep track of. Change 128
142 * to 8192 for complete accuracy...
143 */
144 #define MAX_DUP_CHK (8 * 128)
145 int mx_dup_ck = MAX_DUP_CHK;
146 char rcvd_tbl[MAX_DUP_CHK / 8];
147
148 struct sockaddr_in whereto; /* who to ping */
149 int datalen = DEFDATALEN;
150 int maxpayload;
151 int s; /* socket file descriptor */
152 u_char outpackhdr[IP_MAXPACKET], *outpack;
153 char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */
154 char BSPACE = '\b'; /* characters written for flood */
155 char DOT = '.';
156 char *hostname;
157 char *shostname;
158 int ident; /* process id to identify our packets */
159 int uid; /* cached uid for micro-optimization */
160 u_char icmp_type = ICMP_ECHO;
161 u_char icmp_type_rsp = ICMP_ECHOREPLY;
162 int phdr_len = 0;
163 int send_len;
164
165 /* counters */
166 long nmissedmax; /* max value of ntransmitted - nreceived - 1 */
167 long npackets; /* max packets to transmit */
168 long nreceived; /* # of packets we got back */
169 long nrepeats; /* number of duplicates */
170 long ntransmitted; /* sequence # for outbound packets = #sent */
171 long snpackets; /* max packets to transmit in one sweep */
172 long snreceived; /* # of packets we got back in this sweep */
173 long sntransmitted; /* # of packets we sent in this sweep */
174 int sweepmax; /* max value of payload in sweep */
175 int sweepmin = 0; /* start value of payload in sweep */
176 int sweepincr = 1; /* payload increment in sweep */
177 int interval = 1000; /* interval between packets, ms */
178 int waittime = MAXWAIT; /* timeout for each packet */
179 long nrcvtimeout = 0; /* # of packets we got back after waittime */
180
181 /* timing */
182 int timing; /* flag to do timing */
183 double tmin = 999999999.0; /* minimum round trip time */
184 double tmax = 0.0; /* maximum round trip time */
185 double tsum = 0.0; /* sum of all times, for doing average */
186 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */
187
188 volatile sig_atomic_t finish_up; /* nonzero if we've been told to finish up */
189 volatile sig_atomic_t siginfo_p;
190
191 static void fill(char *, char *);
192 static u_short in_cksum(u_short *, int);
193 static void check_status(void);
194 static void finish(void) __dead2;
195 static void pinger(void);
196 static char *pr_addr(struct in_addr);
197 static char *pr_ntime(n_time);
198 static void pr_icmph(struct icmp *);
199 static void pr_iph(struct ip *);
200 static void pr_pack(char *, int, struct sockaddr_in *, struct timeval *);
201 static void pr_retip(struct ip *);
202 static void status(int);
203 static void stopit(int);
204 static void tvsub(struct timeval *, struct timeval *);
205 static void usage(void) __dead2;
206
207 int
208 main(int argc, char **argv)
209 {
210 struct sockaddr_in from, sock_in;
211 struct in_addr ifaddr;
212 struct timeval last, intvl;
213 struct iovec iov;
214 struct ip *ip;
215 struct msghdr msg;
216 struct sigaction si_sa;
217 size_t sz;
218 u_char *datap, packet[IP_MAXPACKET] __aligned(4);
219 char *ep, *source, *target, *payload;
220 struct hostent *hp;
221 #ifdef IPSEC_POLICY_IPSEC
222 char *policy_in, *policy_out;
223 #endif
224 struct sockaddr_in *to;
225 double t;
226 u_long alarmtimeout, ultmp;
227 int almost_done, ch, df, hold, i, icmp_len, mib[4], preload, sockerrno,
228 tos, ttl;
229 char ctrl[CMSG_SPACE(sizeof(struct timeval))];
230 char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN];
231 #ifdef IP_OPTIONS
232 char rspace[MAX_IPOPTLEN]; /* record route space */
233 #endif
234 unsigned char loop, mttl;
235
236 payload = source = NULL;
237 #ifdef IPSEC_POLICY_IPSEC
238 policy_in = policy_out = NULL;
239 #endif
240
241 /*
242 * Do the stuff that we need root priv's for *first*, and
243 * then drop our setuid bit. Save error reporting for
244 * after arg parsing.
245 */
246 s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
247 sockerrno = errno;
248
249 setuid(getuid());
250 uid = getuid();
251
252 alarmtimeout = df = preload = tos = 0;
253
254 outpack = outpackhdr + sizeof(struct ip);
255 while ((ch = getopt(argc, argv,
256 "Aac:DdfG:g:h:I:i:Ll:M:m:nop:QqRrS:s:T:t:vW:z:"
257 #ifdef IPSEC
258 #ifdef IPSEC_POLICY_IPSEC
259 "P:"
260 #endif /*IPSEC_POLICY_IPSEC*/
261 #endif /*IPSEC*/
262 )) != -1)
263 {
264 switch(ch) {
265 case 'A':
266 options |= F_MISSED;
267 break;
268 case 'a':
269 options |= F_AUDIBLE;
270 break;
271 case 'c':
272 ultmp = strtoul(optarg, &ep, 0);
273 if (*ep || ep == optarg || ultmp > LONG_MAX || !ultmp)
274 errx(EX_USAGE,
275 "invalid count of packets to transmit: `%s'",
276 optarg);
277 npackets = ultmp;
278 break;
279 case 'D':
280 options |= F_HDRINCL;
281 df = 1;
282 break;
283 case 'd':
284 options |= F_SO_DEBUG;
285 break;
286 case 'f':
287 if (uid) {
288 errno = EPERM;
289 err(EX_NOPERM, "-f flag");
290 }
291 options |= F_FLOOD;
292 setbuf(stdout, (char *)NULL);
293 break;
294 case 'G': /* Maximum packet size for ping sweep */
295 ultmp = strtoul(optarg, &ep, 0);
296 if (*ep || ep == optarg)
297 errx(EX_USAGE, "invalid packet size: `%s'",
298 optarg);
299 if (uid != 0 && ultmp > DEFDATALEN) {
300 errno = EPERM;
301 err(EX_NOPERM,
302 "packet size too large: %lu > %u",
303 ultmp, DEFDATALEN);
304 }
305 options |= F_SWEEP;
306 sweepmax = ultmp;
307 break;
308 case 'g': /* Minimum packet size for ping sweep */
309 ultmp = strtoul(optarg, &ep, 0);
310 if (*ep || ep == optarg)
311 errx(EX_USAGE, "invalid packet size: `%s'",
312 optarg);
313 if (uid != 0 && ultmp > DEFDATALEN) {
314 errno = EPERM;
315 err(EX_NOPERM,
316 "packet size too large: %lu > %u",
317 ultmp, DEFDATALEN);
318 }
319 options |= F_SWEEP;
320 sweepmin = ultmp;
321 break;
322 case 'h': /* Packet size increment for ping sweep */
323 ultmp = strtoul(optarg, &ep, 0);
324 if (*ep || ep == optarg || ultmp < 1)
325 errx(EX_USAGE, "invalid increment size: `%s'",
326 optarg);
327 if (uid != 0 && ultmp > DEFDATALEN) {
328 errno = EPERM;
329 err(EX_NOPERM,
330 "packet size too large: %lu > %u",
331 ultmp, DEFDATALEN);
332 }
333 options |= F_SWEEP;
334 sweepincr = ultmp;
335 break;
336 case 'I': /* multicast interface */
337 if (inet_aton(optarg, &ifaddr) == 0)
338 errx(EX_USAGE,
339 "invalid multicast interface: `%s'",
340 optarg);
341 options |= F_MIF;
342 break;
343 case 'i': /* wait between sending packets */
344 t = strtod(optarg, &ep) * 1000.0;
345 if (*ep || ep == optarg || t > (double)INT_MAX)
346 errx(EX_USAGE, "invalid timing interval: `%s'",
347 optarg);
348 options |= F_INTERVAL;
349 interval = (int)t;
350 if (uid && interval < 1000) {
351 errno = EPERM;
352 err(EX_NOPERM, "-i interval too short");
353 }
354 break;
355 case 'L':
356 options |= F_NOLOOP;
357 loop = 0;
358 break;
359 case 'l':
360 ultmp = strtoul(optarg, &ep, 0);
361 if (*ep || ep == optarg || ultmp > INT_MAX)
362 errx(EX_USAGE,
363 "invalid preload value: `%s'", optarg);
364 if (uid) {
365 errno = EPERM;
366 err(EX_NOPERM, "-l flag");
367 }
368 preload = ultmp;
369 break;
370 case 'M':
371 switch(optarg[0]) {
372 case 'M':
373 case 'm':
374 options |= F_MASK;
375 break;
376 case 'T':
377 case 't':
378 options |= F_TIME;
379 break;
380 default:
381 errx(EX_USAGE, "invalid message: `%c'", optarg[0]);
382 break;
383 }
384 break;
385 case 'm': /* TTL */
386 ultmp = strtoul(optarg, &ep, 0);
387 if (*ep || ep == optarg || ultmp > MAXTTL)
388 errx(EX_USAGE, "invalid TTL: `%s'", optarg);
389 ttl = ultmp;
390 options |= F_TTL;
391 break;
392 case 'n':
393 options |= F_NUMERIC;
394 break;
395 case 'o':
396 options |= F_ONCE;
397 break;
398 #ifdef IPSEC
399 #ifdef IPSEC_POLICY_IPSEC
400 case 'P':
401 options |= F_POLICY;
402 if (!strncmp("in", optarg, 2))
403 policy_in = strdup(optarg);
404 else if (!strncmp("out", optarg, 3))
405 policy_out = strdup(optarg);
406 else
407 errx(1, "invalid security policy");
408 break;
409 #endif /*IPSEC_POLICY_IPSEC*/
410 #endif /*IPSEC*/
411 case 'p': /* fill buffer with user pattern */
412 options |= F_PINGFILLED;
413 payload = optarg;
414 break;
415 case 'Q':
416 options |= F_QUIET2;
417 break;
418 case 'q':
419 options |= F_QUIET;
420 break;
421 case 'R':
422 options |= F_RROUTE;
423 break;
424 case 'r':
425 options |= F_SO_DONTROUTE;
426 break;
427 case 'S':
428 source = optarg;
429 break;
430 case 's': /* size of packet to send */
431 ultmp = strtoul(optarg, &ep, 0);
432 if (*ep || ep == optarg)
433 errx(EX_USAGE, "invalid packet size: `%s'",
434 optarg);
435 if (uid != 0 && ultmp > DEFDATALEN) {
436 errno = EPERM;
437 err(EX_NOPERM,
438 "packet size too large: %lu > %u",
439 ultmp, DEFDATALEN);
440 }
441 datalen = ultmp;
442 break;
443 case 'T': /* multicast TTL */
444 ultmp = strtoul(optarg, &ep, 0);
445 if (*ep || ep == optarg || ultmp > MAXTTL)
446 errx(EX_USAGE, "invalid multicast TTL: `%s'",
447 optarg);
448 mttl = ultmp;
449 options |= F_MTTL;
450 break;
451 case 't':
452 alarmtimeout = strtoul(optarg, &ep, 0);
453 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
454 errx(EX_USAGE, "invalid timeout: `%s'",
455 optarg);
456 if (alarmtimeout > MAXALARM)
457 errx(EX_USAGE, "invalid timeout: `%s' > %d",
458 optarg, MAXALARM);
459 alarm((int)alarmtimeout);
460 break;
461 case 'v':
462 options |= F_VERBOSE;
463 break;
464 case 'W': /* wait ms for answer */
465 t = strtod(optarg, &ep);
466 if (*ep || ep == optarg || t > (double)INT_MAX)
467 errx(EX_USAGE, "invalid timing interval: `%s'",
468 optarg);
469 options |= F_WAITTIME;
470 waittime = (int)t;
471 break;
472 case 'z':
473 options |= F_HDRINCL;
474 ultmp = strtoul(optarg, &ep, 0);
475 if (*ep || ep == optarg || ultmp > MAXTOS)
476 errx(EX_USAGE, "invalid TOS: `%s'", optarg);
477 tos = ultmp;
478 break;
479 default:
480 usage();
481 }
482 }
483
484 if (argc - optind != 1)
485 usage();
486 target = argv[optind];
487
488 switch (options & (F_MASK|F_TIME)) {
489 case 0: break;
490 case F_MASK:
491 icmp_type = ICMP_MASKREQ;
492 icmp_type_rsp = ICMP_MASKREPLY;
493 phdr_len = MASK_LEN;
494 if (!(options & F_QUIET))
495 printf("ICMP_MASKREQ\n");
496 break;
497 case F_TIME:
498 icmp_type = ICMP_TSTAMP;
499 icmp_type_rsp = ICMP_TSTAMPREPLY;
500 phdr_len = TS_LEN;
501 if (!(options & F_QUIET))
502 printf("ICMP_TSTAMP\n");
503 break;
504 default:
505 errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive.");
506 break;
507 }
508 icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len;
509 if (options & F_RROUTE)
510 icmp_len += MAX_IPOPTLEN;
511 maxpayload = IP_MAXPACKET - icmp_len;
512 if (datalen > maxpayload)
513 errx(EX_USAGE, "packet size too large: %d > %d", datalen,
514 maxpayload);
515 send_len = icmp_len + datalen;
516 datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN];
517 if (options & F_PINGFILLED) {
518 fill((char *)datap, payload);
519 }
520 if (source) {
521 bzero((char *)&sock_in, sizeof(sock_in));
522 sock_in.sin_family = AF_INET;
523 if (inet_aton(source, &sock_in.sin_addr) != 0) {
524 shostname = source;
525 } else {
526 hp = gethostbyname2(source, AF_INET);
527 if (!hp)
528 errx(EX_NOHOST, "cannot resolve %s: %s",
529 source, hstrerror(h_errno));
530
531 sock_in.sin_len = sizeof sock_in;
532 if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) ||
533 hp->h_length < 0)
534 errx(1, "gethostbyname2: illegal address");
535 memcpy(&sock_in.sin_addr, hp->h_addr_list[0],
536 sizeof(sock_in.sin_addr));
537 strncpy(snamebuf, hp->h_name,
538 sizeof(snamebuf) - 1);
539 snamebuf[sizeof(snamebuf) - 1] = '\0';
540 shostname = snamebuf;
541 }
542 if (bind(s, (struct sockaddr *)&sock_in, sizeof sock_in) == -1)
543 err(1, "bind");
544 }
545
546 bzero(&whereto, sizeof(whereto));
547 to = &whereto;
548 to->sin_family = AF_INET;
549 to->sin_len = sizeof *to;
550 if (inet_aton(target, &to->sin_addr) != 0) {
551 hostname = target;
552 } else {
553 hp = gethostbyname2(target, AF_INET);
554 if (!hp)
555 errx(EX_NOHOST, "cannot resolve %s: %s",
556 target, hstrerror(h_errno));
557
558 if ((unsigned)hp->h_length > sizeof(to->sin_addr))
559 errx(1, "gethostbyname2 returned an illegal address");
560 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr);
561 strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1);
562 hnamebuf[sizeof(hnamebuf) - 1] = '\0';
563 hostname = hnamebuf;
564 }
565
566 if (options & F_FLOOD && options & F_INTERVAL)
567 errx(EX_USAGE, "-f and -i: incompatible options");
568
569 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
570 errx(EX_USAGE,
571 "-f flag cannot be used with multicast destination");
572 if (options & (F_MIF | F_NOLOOP | F_MTTL)
573 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
574 errx(EX_USAGE,
575 "-I, -L, -T flags cannot be used with unicast destination");
576
577 if (datalen >= TIMEVAL_LEN) /* can we time transfer */
578 timing = 1;
579
580 if (!(options & F_PINGFILLED))
581 for (i = TIMEVAL_LEN; i < datalen; ++i)
582 *datap++ = i;
583
584 ident = getpid() & 0xFFFF;
585
586 if (s < 0) {
587 errno = sockerrno;
588 err(EX_OSERR, "socket");
589 }
590 hold = 1;
591 if (options & F_SO_DEBUG)
592 setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
593 sizeof(hold));
594 if (options & F_SO_DONTROUTE)
595 setsockopt(s, SOL_SOCKET, SO_DONTROUTE, (char *)&hold,
596 sizeof(hold));
597 #ifdef IPSEC
598 #ifdef IPSEC_POLICY_IPSEC
599 if (options & F_POLICY) {
600 char *buf;
601 if (policy_in != NULL) {
602 buf = ipsec_set_policy(policy_in, strlen(policy_in));
603 if (buf == NULL)
604 errx(EX_CONFIG, "%s", ipsec_strerror());
605 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY,
606 buf, ipsec_get_policylen(buf)) < 0)
607 err(EX_CONFIG,
608 "ipsec policy cannot be configured");
609 free(buf);
610 }
611
612 if (policy_out != NULL) {
613 buf = ipsec_set_policy(policy_out, strlen(policy_out));
614 if (buf == NULL)
615 errx(EX_CONFIG, "%s", ipsec_strerror());
616 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY,
617 buf, ipsec_get_policylen(buf)) < 0)
618 err(EX_CONFIG,
619 "ipsec policy cannot be configured");
620 free(buf);
621 }
622 }
623 #endif /*IPSEC_POLICY_IPSEC*/
624 #endif /*IPSEC*/
625
626 if (options & F_HDRINCL) {
627 ip = (struct ip*)outpackhdr;
628 if (!(options & (F_TTL | F_MTTL))) {
629 mib[0] = CTL_NET;
630 mib[1] = PF_INET;
631 mib[2] = IPPROTO_IP;
632 mib[3] = IPCTL_DEFTTL;
633 sz = sizeof(ttl);
634 if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1)
635 err(1, "sysctl(net.inet.ip.ttl)");
636 }
637 setsockopt(s, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold));
638 ip->ip_v = IPVERSION;
639 ip->ip_hl = sizeof(struct ip) >> 2;
640 ip->ip_tos = tos;
641 ip->ip_id = 0;
642 ip->ip_off = df ? IP_DF : 0;
643 ip->ip_ttl = ttl;
644 ip->ip_p = IPPROTO_ICMP;
645 ip->ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY;
646 ip->ip_dst = to->sin_addr;
647 }
648 /* record route option */
649 if (options & F_RROUTE) {
650 #ifdef IP_OPTIONS
651 bzero(rspace, sizeof(rspace));
652 rspace[IPOPT_OPTVAL] = IPOPT_RR;
653 rspace[IPOPT_OLEN] = sizeof(rspace) - 1;
654 rspace[IPOPT_OFFSET] = IPOPT_MINOFF;
655 rspace[sizeof(rspace) - 1] = IPOPT_EOL;
656 if (setsockopt(s, IPPROTO_IP, IP_OPTIONS, rspace,
657 sizeof(rspace)) < 0)
658 err(EX_OSERR, "setsockopt IP_OPTIONS");
659 #else
660 errx(EX_UNAVAILABLE,
661 "record route not available in this implementation");
662 #endif /* IP_OPTIONS */
663 }
664
665 if (options & F_TTL) {
666 if (setsockopt(s, IPPROTO_IP, IP_TTL, &ttl,
667 sizeof(ttl)) < 0) {
668 err(EX_OSERR, "setsockopt IP_TTL");
669 }
670 }
671 if (options & F_NOLOOP) {
672 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &loop,
673 sizeof(loop)) < 0) {
674 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP");
675 }
676 }
677 if (options & F_MTTL) {
678 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &mttl,
679 sizeof(mttl)) < 0) {
680 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL");
681 }
682 }
683 if (options & F_MIF) {
684 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr,
685 sizeof(ifaddr)) < 0) {
686 err(EX_OSERR, "setsockopt IP_MULTICAST_IF");
687 }
688 }
689 #ifdef SO_TIMESTAMP
690 { int on = 1;
691 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)) < 0)
692 err(EX_OSERR, "setsockopt SO_TIMESTAMP");
693 }
694 #endif
695 if (sweepmax) {
696 if (sweepmin >= sweepmax)
697 errx(EX_USAGE, "Maximum packet size must be greater than the minimum packet size");
698
699 if (datalen != DEFDATALEN)
700 errx(EX_USAGE, "Packet size and ping sweep are mutually exclusive");
701
702 if (npackets > 0) {
703 snpackets = npackets;
704 npackets = 0;
705 } else
706 snpackets = 1;
707 datalen = sweepmin;
708 send_len = icmp_len + sweepmin;
709 }
710 if (options & F_SWEEP && !sweepmax)
711 errx(EX_USAGE, "Maximum sweep size must be specified");
712
713 /*
714 * When pinging the broadcast address, you can get a lot of answers.
715 * Doing something so evil is useful if you are trying to stress the
716 * ethernet, or just want to fill the arp cache to get some stuff for
717 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast
718 * or multicast pings if they wish.
719 */
720
721 /*
722 * XXX receive buffer needs undetermined space for mbuf overhead
723 * as well.
724 */
725 hold = IP_MAXPACKET + 128;
726 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
727 sizeof(hold));
728 if (uid == 0)
729 setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char *)&hold,
730 sizeof(hold));
731
732 if (to->sin_family == AF_INET) {
733 printf("PING %s (%s)", hostname,
734 inet_ntoa(to->sin_addr));
735 if (source)
736 printf(" from %s", shostname);
737 if (sweepmax)
738 printf(": (%d ... %d) data bytes\n",
739 sweepmin, sweepmax);
740 else
741 printf(": %d data bytes\n", datalen);
742
743 } else {
744 if (sweepmax)
745 printf("PING %s: (%d ... %d) data bytes\n",
746 hostname, sweepmin, sweepmax);
747 else
748 printf("PING %s: %d data bytes\n", hostname, datalen);
749 }
750
751 /*
752 * Use sigaction() instead of signal() to get unambiguous semantics,
753 * in particular with SA_RESTART not set.
754 */
755
756 sigemptyset(&si_sa.sa_mask);
757 si_sa.sa_flags = 0;
758
759 si_sa.sa_handler = stopit;
760 if (sigaction(SIGINT, &si_sa, 0) == -1) {
761 err(EX_OSERR, "sigaction SIGINT");
762 }
763
764 si_sa.sa_handler = status;
765 if (sigaction(SIGINFO, &si_sa, 0) == -1) {
766 err(EX_OSERR, "sigaction");
767 }
768
769 if (alarmtimeout > 0) {
770 si_sa.sa_handler = stopit;
771 if (sigaction(SIGALRM, &si_sa, 0) == -1)
772 err(EX_OSERR, "sigaction SIGALRM");
773 }
774
775 bzero(&msg, sizeof(msg));
776 msg.msg_name = &from;
777 msg.msg_iov = &iov;
778 msg.msg_iovlen = 1;
779 #ifdef SO_TIMESTAMP
780 msg.msg_control = ctrl;
781 #endif
782 iov.iov_base = (char *)packet;
783 iov.iov_len = IP_MAXPACKET;
784
785 if (preload == 0)
786 pinger(); /* send the first ping */
787 else {
788 if (npackets != 0 && preload > npackets)
789 preload = npackets;
790 while (preload--) /* fire off them quickies */
791 pinger();
792 }
793 gettimeofday(&last, NULL);
794
795 if (options & F_FLOOD) {
796 intvl.tv_sec = 0;
797 intvl.tv_usec = 10000;
798 } else {
799 intvl.tv_sec = interval / 1000;
800 intvl.tv_usec = interval % 1000 * 1000;
801 }
802
803 almost_done = 0;
804 while (!finish_up) {
805 struct timeval now, timeout;
806 fd_set rfds;
807 int cc, n;
808
809 check_status();
810 if ((unsigned)s >= FD_SETSIZE)
811 errx(EX_OSERR, "descriptor too large");
812 FD_ZERO(&rfds);
813 FD_SET(s, &rfds);
814 gettimeofday(&now, NULL);
815 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
816 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
817 while (timeout.tv_usec < 0) {
818 timeout.tv_usec += 1000000;
819 timeout.tv_sec--;
820 }
821 while (timeout.tv_usec >= 1000000) {
822 timeout.tv_usec -= 1000000;
823 timeout.tv_sec++;
824 }
825 if (timeout.tv_sec < 0)
826 timeout.tv_sec = timeout.tv_usec = 0;
827 n = select(s + 1, &rfds, NULL, NULL, &timeout);
828 if (n < 0)
829 continue; /* Must be EINTR. */
830 if (n == 1) {
831 struct timeval *tv = NULL;
832 #ifdef SO_TIMESTAMP
833 struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl;
834
835 msg.msg_controllen = sizeof(ctrl);
836 #endif
837 msg.msg_namelen = sizeof(from);
838 if ((cc = recvmsg(s, &msg, 0)) < 0) {
839 if (errno == EINTR)
840 continue;
841 warn("recvmsg");
842 continue;
843 }
844 #ifdef SO_TIMESTAMP
845 if (cmsg->cmsg_level == SOL_SOCKET &&
846 cmsg->cmsg_type == SCM_TIMESTAMP &&
847 cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) {
848 /* Copy to avoid alignment problems: */
849 memcpy(&now, CMSG_DATA(cmsg), sizeof(now));
850 tv = &now;
851 }
852 #endif
853 if (tv == NULL) {
854 gettimeofday(&now, NULL);
855 tv = &now;
856 }
857 pr_pack((char *)packet, cc, &from, tv);
858 if ((options & F_ONCE && nreceived) ||
859 (npackets && nreceived >= npackets))
860 break;
861 }
862 if (n == 0 || options & F_FLOOD) {
863 if (sweepmax && sntransmitted == snpackets) {
864 for (i = 0; i < sweepincr ; ++i)
865 *datap++ = i;
866 datalen += sweepincr;
867 if (datalen > sweepmax)
868 break;
869 send_len = icmp_len + datalen;
870 sntransmitted = 0;
871 }
872 if (!npackets || ntransmitted < npackets)
873 pinger();
874 else {
875 if (almost_done)
876 break;
877 almost_done = 1;
878 intvl.tv_usec = 0;
879 if (nreceived) {
880 intvl.tv_sec = 2 * tmax / 1000;
881 if (!intvl.tv_sec)
882 intvl.tv_sec = 1;
883 } else {
884 intvl.tv_sec = waittime / 1000;
885 intvl.tv_usec = waittime % 1000 * 1000;
886 }
887 }
888 gettimeofday(&last, NULL);
889 if (ntransmitted - nreceived - 1 > nmissedmax) {
890 nmissedmax = ntransmitted - nreceived - 1;
891 if (options & F_MISSED)
892 write(STDOUT_FILENO, &BBELL, 1);
893 }
894 }
895 }
896 finish();
897 /* NOTREACHED */
898 exit(0); /* Make the compiler happy */
899 }
900
901 /*
902 * stopit --
903 * Set the global bit that causes the main loop to quit.
904 * Do NOT call finish() from here, since finish() does far too much
905 * to be called from a signal handler.
906 */
907 void
908 stopit(int sig __unused)
909 {
910
911 /*
912 * When doing reverse DNS lookups, the finish_up flag might not
913 * be noticed for a while. Just exit if we get a second SIGINT.
914 */
915 if (!(options & F_NUMERIC) && finish_up)
916 _exit(nreceived ? 0 : 2);
917 finish_up = 1;
918 }
919
920 /*
921 * pinger --
922 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
923 * will be added on by the kernel. The ID field is our UNIX process ID,
924 * and the sequence number is an ascending integer. The first TIMEVAL_LEN
925 * bytes of the data portion are used to hold a UNIX "timeval" struct in
926 * host byte-order, to compute the round-trip time.
927 */
928 static void
929 pinger(void)
930 {
931 struct timeval now;
932 struct tv32 tv32;
933 struct ip *ip;
934 struct icmp *icp;
935 int cc, i;
936 u_char *packet;
937
938 packet = outpack;
939 icp = (struct icmp *)outpack;
940 icp->icmp_type = icmp_type;
941 icp->icmp_code = 0;
942 icp->icmp_cksum = 0;
943 icp->icmp_seq = htons(ntransmitted);
944 icp->icmp_id = ident; /* ID */
945
946 CLR(ntransmitted % mx_dup_ck);
947
948 if ((options & F_TIME) || timing) {
949 gettimeofday(&now, NULL);
950
951 tv32.tv32_sec = htonl(now.tv_sec);
952 tv32.tv32_usec = htonl(now.tv_usec);
953 if (options & F_TIME)
954 icp->icmp_otime = htonl((now.tv_sec % (24*60*60))
955 * 1000 + now.tv_usec / 1000);
956 if (timing)
957 bcopy((void *)&tv32,
958 (void *)&outpack[ICMP_MINLEN + phdr_len],
959 sizeof(tv32));
960 }
961
962 cc = ICMP_MINLEN + phdr_len + datalen;
963
964 /* compute ICMP checksum here */
965 icp->icmp_cksum = in_cksum((u_short *)icp, cc);
966
967 if (options & F_HDRINCL) {
968 cc += sizeof(struct ip);
969 ip = (struct ip *)outpackhdr;
970 ip->ip_len = cc;
971 ip->ip_sum = in_cksum((u_short *)outpackhdr, cc);
972 packet = outpackhdr;
973 }
974 i = sendto(s, (char *)packet, cc, 0, (struct sockaddr *)&whereto,
975 sizeof(whereto));
976
977 if (i < 0 || i != cc) {
978 if (i < 0) {
979 if (options & F_FLOOD && errno == ENOBUFS) {
980 usleep(FLOOD_BACKOFF);
981 return;
982 }
983 warn("sendto");
984 } else {
985 warn("%s: partial write: %d of %d bytes",
986 hostname, i, cc);
987 }
988 }
989 ntransmitted++;
990 sntransmitted++;
991 if (!(options & F_QUIET) && options & F_FLOOD)
992 write(STDOUT_FILENO, &DOT, 1);
993 }
994
995 /*
996 * pr_pack --
997 * Print out the packet, if it came from us. This logic is necessary
998 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
999 * which arrive ('tis only fair). This permits multiple copies of this
1000 * program to be run without having intermingled output (or statistics!).
1001 */
1002 static void
1003 pr_pack(buf, cc, from, tv)
1004 char *buf;
1005 int cc;
1006 struct sockaddr_in *from;
1007 struct timeval *tv;
1008 {
1009 struct in_addr ina;
1010 u_char *cp, *dp;
1011 struct icmp *icp;
1012 struct ip *ip;
1013 const void *tp;
1014 double triptime;
1015 int dupflag, hlen, i, j, recv_len, seq;
1016 static int old_rrlen;
1017 static char old_rr[MAX_IPOPTLEN];
1018
1019 /* Check the IP header */
1020 ip = (struct ip *)buf;
1021 hlen = ip->ip_hl << 2;
1022 recv_len = cc;
1023 if (cc < hlen + ICMP_MINLEN) {
1024 if (options & F_VERBOSE)
1025 warn("packet too short (%d bytes) from %s", cc,
1026 inet_ntoa(from->sin_addr));
1027 return;
1028 }
1029
1030 /* Now the ICMP part */
1031 cc -= hlen;
1032 icp = (struct icmp *)(buf + hlen);
1033 if (icp->icmp_type == icmp_type_rsp) {
1034 if (icp->icmp_id != ident)
1035 return; /* 'Twas not our ECHO */
1036 ++nreceived;
1037 triptime = 0.0;
1038 if (timing) {
1039 struct timeval tv1;
1040 struct tv32 tv32;
1041 #ifndef icmp_data
1042 tp = &icp->icmp_ip;
1043 #else
1044 tp = icp->icmp_data;
1045 #endif
1046 tp = (const char *)tp + phdr_len;
1047
1048 if (cc - ICMP_MINLEN - phdr_len >= (int)sizeof(tv1)) {
1049 /* Copy to avoid alignment problems: */
1050 memcpy(&tv32, tp, sizeof(tv32));
1051 tv1.tv_sec = ntohl(tv32.tv32_sec);
1052 tv1.tv_usec = ntohl(tv32.tv32_usec);
1053 tvsub(tv, &tv1);
1054 triptime = ((double)tv->tv_sec) * 1000.0 +
1055 ((double)tv->tv_usec) / 1000.0;
1056 tsum += triptime;
1057 tsumsq += triptime * triptime;
1058 if (triptime < tmin)
1059 tmin = triptime;
1060 if (triptime > tmax)
1061 tmax = triptime;
1062 } else
1063 timing = 0;
1064 }
1065
1066 seq = ntohs(icp->icmp_seq);
1067
1068 if (TST(seq % mx_dup_ck)) {
1069 ++nrepeats;
1070 --nreceived;
1071 dupflag = 1;
1072 } else {
1073 SET(seq % mx_dup_ck);
1074 dupflag = 0;
1075 }
1076
1077 if (options & F_QUIET)
1078 return;
1079
1080 if (options & F_WAITTIME && triptime > waittime) {
1081 ++nrcvtimeout;
1082 return;
1083 }
1084
1085 if (options & F_FLOOD)
1086 write(STDOUT_FILENO, &BSPACE, 1);
1087 else {
1088 printf("%d bytes from %s: icmp_seq=%u", cc,
1089 inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr),
1090 seq);
1091 printf(" ttl=%d", ip->ip_ttl);
1092 if (timing)
1093 printf(" time=%.3f ms", triptime);
1094 if (dupflag)
1095 printf(" (DUP!)");
1096 if (options & F_AUDIBLE)
1097 write(STDOUT_FILENO, &BBELL, 1);
1098 if (options & F_MASK) {
1099 /* Just prentend this cast isn't ugly */
1100 printf(" mask=%s",
1101 pr_addr(*(struct in_addr *)&(icp->icmp_mask)));
1102 }
1103 if (options & F_TIME) {
1104 printf(" tso=%s", pr_ntime(icp->icmp_otime));
1105 printf(" tsr=%s", pr_ntime(icp->icmp_rtime));
1106 printf(" tst=%s", pr_ntime(icp->icmp_ttime));
1107 }
1108 if (recv_len != send_len) {
1109 printf(
1110 "\nwrong total length %d instead of %d",
1111 recv_len, send_len);
1112 }
1113 /* check the data */
1114 cp = (u_char*)&icp->icmp_data[phdr_len];
1115 dp = &outpack[ICMP_MINLEN + phdr_len];
1116 cc -= ICMP_MINLEN + phdr_len;
1117 i = 0;
1118 if (timing) { /* don't check variable timestamp */
1119 cp += TIMEVAL_LEN;
1120 dp += TIMEVAL_LEN;
1121 cc -= TIMEVAL_LEN;
1122 i += TIMEVAL_LEN;
1123 }
1124 for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) {
1125 if (*cp != *dp) {
1126 printf("\nwrong data byte #%d should be 0x%x but was 0x%x",
1127 i, *dp, *cp);
1128 printf("\ncp:");
1129 cp = (u_char*)&icp->icmp_data[0];
1130 for (i = 0; i < datalen; ++i, ++cp) {
1131 if ((i % 16) == 8)
1132 printf("\n\t");
1133 printf("%2x ", *cp);
1134 }
1135 printf("\ndp:");
1136 cp = &outpack[ICMP_MINLEN];
1137 for (i = 0; i < datalen; ++i, ++cp) {
1138 if ((i % 16) == 8)
1139 printf("\n\t");
1140 printf("%2x ", *cp);
1141 }
1142 break;
1143 }
1144 }
1145 }
1146 } else {
1147 /*
1148 * We've got something other than an ECHOREPLY.
1149 * See if it's a reply to something that we sent.
1150 * We can compare IP destination, protocol,
1151 * and ICMP type and ID.
1152 *
1153 * Only print all the error messages if we are running
1154 * as root to avoid leaking information not normally
1155 * available to those not running as root.
1156 */
1157 #ifndef icmp_data
1158 struct ip *oip = &icp->icmp_ip;
1159 #else
1160 struct ip *oip = (struct ip *)icp->icmp_data;
1161 #endif
1162 struct icmp *oicmp = (struct icmp *)(oip + 1);
1163
1164 if (((options & F_VERBOSE) && uid == 0) ||
1165 (!(options & F_QUIET2) &&
1166 (oip->ip_dst.s_addr == whereto.sin_addr.s_addr) &&
1167 (oip->ip_p == IPPROTO_ICMP) &&
1168 (oicmp->icmp_type == ICMP_ECHO) &&
1169 (oicmp->icmp_id == ident))) {
1170 printf("%d bytes from %s: ", cc,
1171 pr_addr(from->sin_addr));
1172 pr_icmph(icp);
1173 } else
1174 return;
1175 }
1176
1177 /* Display any IP options */
1178 cp = (u_char *)buf + sizeof(struct ip);
1179
1180 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp)
1181 switch (*cp) {
1182 case IPOPT_EOL:
1183 hlen = 0;
1184 break;
1185 case IPOPT_LSRR:
1186 case IPOPT_SSRR:
1187 printf(*cp == IPOPT_LSRR ?
1188 "\nLSRR: " : "\nSSRR: ");
1189 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1;
1190 hlen -= 2;
1191 cp += 2;
1192 if (j >= INADDR_LEN &&
1193 j <= hlen - (int)sizeof(struct ip)) {
1194 for (;;) {
1195 bcopy(++cp, &ina.s_addr, INADDR_LEN);
1196 if (ina.s_addr == 0)
1197 printf("\t0.0.0.0");
1198 else
1199 printf("\t%s", pr_addr(ina));
1200 hlen -= INADDR_LEN;
1201 cp += INADDR_LEN - 1;
1202 j -= INADDR_LEN;
1203 if (j < INADDR_LEN)
1204 break;
1205 putchar('\n');
1206 }
1207 } else
1208 printf("\t(truncated route)\n");
1209 break;
1210 case IPOPT_RR:
1211 j = cp[IPOPT_OLEN]; /* get length */
1212 i = cp[IPOPT_OFFSET]; /* and pointer */
1213 hlen -= 2;
1214 cp += 2;
1215 if (i > j)
1216 i = j;
1217 i = i - IPOPT_MINOFF + 1;
1218 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) {
1219 old_rrlen = 0;
1220 continue;
1221 }
1222 if (i == old_rrlen
1223 && !bcmp((char *)cp, old_rr, i)
1224 && !(options & F_FLOOD)) {
1225 printf("\t(same route)");
1226 hlen -= i;
1227 cp += i;
1228 break;
1229 }
1230 old_rrlen = i;
1231 bcopy((char *)cp, old_rr, i);
1232 printf("\nRR: ");
1233 if (i >= INADDR_LEN &&
1234 i <= hlen - (int)sizeof(struct ip)) {
1235 for (;;) {
1236 bcopy(++cp, &ina.s_addr, INADDR_LEN);
1237 if (ina.s_addr == 0)
1238 printf("\t0.0.0.0");
1239 else
1240 printf("\t%s", pr_addr(ina));
1241 hlen -= INADDR_LEN;
1242 cp += INADDR_LEN - 1;
1243 i -= INADDR_LEN;
1244 if (i < INADDR_LEN)
1245 break;
1246 putchar('\n');
1247 }
1248 } else
1249 printf("\t(truncated route)");
1250 break;
1251 case IPOPT_NOP:
1252 printf("\nNOP");
1253 break;
1254 default:
1255 printf("\nunknown option %x", *cp);
1256 break;
1257 }
1258 if (!(options & F_FLOOD)) {
1259 putchar('\n');
1260 fflush(stdout);
1261 }
1262 }
1263
1264 /*
1265 * in_cksum --
1266 * Checksum routine for Internet Protocol family headers (C Version)
1267 */
1268 u_short
1269 in_cksum(u_short *addr, int len)
1270 {
1271 int nleft, sum;
1272 u_short *w;
1273 union {
1274 u_short us;
1275 u_char uc[2];
1276 } last;
1277 u_short answer;
1278
1279 nleft = len;
1280 sum = 0;
1281 w = addr;
1282
1283 /*
1284 * Our algorithm is simple, using a 32 bit accumulator (sum), we add
1285 * sequential 16 bit words to it, and at the end, fold back all the
1286 * carry bits from the top 16 bits into the lower 16 bits.
1287 */
1288 while (nleft > 1) {
1289 sum += *w++;
1290 nleft -= 2;
1291 }
1292
1293 /* mop up an odd byte, if necessary */
1294 if (nleft == 1) {
1295 last.uc[0] = *(u_char *)w;
1296 last.uc[1] = 0;
1297 sum += last.us;
1298 }
1299
1300 /* add back carry outs from top 16 bits to low 16 bits */
1301 sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */
1302 sum += (sum >> 16); /* add carry */
1303 answer = ~sum; /* truncate to 16 bits */
1304 return(answer);
1305 }
1306
1307 /*
1308 * tvsub --
1309 * Subtract 2 timeval structs: out = out - in. Out is assumed to
1310 * be >= in.
1311 */
1312 static void
1313 tvsub(struct timeval *out, struct timeval *in)
1314 {
1315
1316 if ((out->tv_usec -= in->tv_usec) < 0) {
1317 --out->tv_sec;
1318 out->tv_usec += 1000000;
1319 }
1320 out->tv_sec -= in->tv_sec;
1321 }
1322
1323 /*
1324 * status --
1325 * Print out statistics when SIGINFO is received.
1326 */
1327
1328 static void
1329 status(int sig __unused)
1330 {
1331
1332 siginfo_p = 1;
1333 }
1334
1335 static void
1336 check_status(void)
1337 {
1338
1339 if (siginfo_p) {
1340 siginfo_p = 0;
1341 fprintf(stderr, "\r%ld/%ld packets received (%.1f%%)",
1342 nreceived, ntransmitted,
1343 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0);
1344 if (nreceived && timing)
1345 fprintf(stderr, " %.3f min / %.3f avg / %.3f max",
1346 tmin, tsum / (nreceived + nrepeats), tmax);
1347 fprintf(stderr, "\n");
1348 }
1349 }
1350
1351 /*
1352 * finish --
1353 * Print out statistics, and give up.
1354 */
1355 static void
1356 finish(void)
1357 {
1358
1359 signal(SIGINT, SIG_IGN);
1360 signal(SIGALRM, SIG_IGN);
1361 putchar('\n');
1362 fflush(stdout);
1363 printf("--- %s ping statistics ---\n", hostname);
1364 printf("%ld packets transmitted, ", ntransmitted);
1365 printf("%ld packets received, ", nreceived);
1366 if (nrepeats)
1367 printf("+%ld duplicates, ", nrepeats);
1368 if (ntransmitted) {
1369 if (nreceived > ntransmitted)
1370 printf("-- somebody's printing up packets!");
1371 else
1372 printf("%.1f%% packet loss",
1373 ((ntransmitted - nreceived) * 100.0) /
1374 ntransmitted);
1375 }
1376 if (nrcvtimeout)
1377 printf(", %ld packets out of wait time", nrcvtimeout);
1378 putchar('\n');
1379 if (nreceived && timing) {
1380 double n = nreceived + nrepeats;
1381 double avg = tsum / n;
1382 double vari = tsumsq / n - avg * avg;
1383 printf(
1384 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n",
1385 tmin, avg, tmax, sqrt(vari));
1386 }
1387
1388 if (nreceived)
1389 exit(0);
1390 else
1391 exit(2);
1392 }
1393
1394 #ifdef notdef
1395 static char *ttab[] = {
1396 "Echo Reply", /* ip + seq + udata */
1397 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */
1398 "Source Quench", /* IP */
1399 "Redirect", /* redirect type, gateway, + IP */
1400 "Echo",
1401 "Time Exceeded", /* transit, frag reassem + IP */
1402 "Parameter Problem", /* pointer + IP */
1403 "Timestamp", /* id + seq + three timestamps */
1404 "Timestamp Reply", /* " */
1405 "Info Request", /* id + sq */
1406 "Info Reply" /* " */
1407 };
1408 #endif
1409
1410 /*
1411 * pr_icmph --
1412 * Print a descriptive string about an ICMP header.
1413 */
1414 static void
1415 pr_icmph(struct icmp *icp)
1416 {
1417
1418 switch(icp->icmp_type) {
1419 case ICMP_ECHOREPLY:
1420 printf("Echo Reply\n");
1421 /* XXX ID + Seq + Data */
1422 break;
1423 case ICMP_UNREACH:
1424 switch(icp->icmp_code) {
1425 case ICMP_UNREACH_NET:
1426 printf("Destination Net Unreachable\n");
1427 break;
1428 case ICMP_UNREACH_HOST:
1429 printf("Destination Host Unreachable\n");
1430 break;
1431 case ICMP_UNREACH_PROTOCOL:
1432 printf("Destination Protocol Unreachable\n");
1433 break;
1434 case ICMP_UNREACH_PORT:
1435 printf("Destination Port Unreachable\n");
1436 break;
1437 case ICMP_UNREACH_NEEDFRAG:
1438 printf("frag needed and DF set (MTU %d)\n",
1439 ntohs(icp->icmp_nextmtu));
1440 break;
1441 case ICMP_UNREACH_SRCFAIL:
1442 printf("Source Route Failed\n");
1443 break;
1444 case ICMP_UNREACH_FILTER_PROHIB:
1445 printf("Communication prohibited by filter\n");
1446 break;
1447 default:
1448 printf("Dest Unreachable, Bad Code: %d\n",
1449 icp->icmp_code);
1450 break;
1451 }
1452 /* Print returned IP header information */
1453 #ifndef icmp_data
1454 pr_retip(&icp->icmp_ip);
1455 #else
1456 pr_retip((struct ip *)icp->icmp_data);
1457 #endif
1458 break;
1459 case ICMP_SOURCEQUENCH:
1460 printf("Source Quench\n");
1461 #ifndef icmp_data
1462 pr_retip(&icp->icmp_ip);
1463 #else
1464 pr_retip((struct ip *)icp->icmp_data);
1465 #endif
1466 break;
1467 case ICMP_REDIRECT:
1468 switch(icp->icmp_code) {
1469 case ICMP_REDIRECT_NET:
1470 printf("Redirect Network");
1471 break;
1472 case ICMP_REDIRECT_HOST:
1473 printf("Redirect Host");
1474 break;
1475 case ICMP_REDIRECT_TOSNET:
1476 printf("Redirect Type of Service and Network");
1477 break;
1478 case ICMP_REDIRECT_TOSHOST:
1479 printf("Redirect Type of Service and Host");
1480 break;
1481 default:
1482 printf("Redirect, Bad Code: %d", icp->icmp_code);
1483 break;
1484 }
1485 printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr));
1486 #ifndef icmp_data
1487 pr_retip(&icp->icmp_ip);
1488 #else
1489 pr_retip((struct ip *)icp->icmp_data);
1490 #endif
1491 break;
1492 case ICMP_ECHO:
1493 printf("Echo Request\n");
1494 /* XXX ID + Seq + Data */
1495 break;
1496 case ICMP_TIMXCEED:
1497 switch(icp->icmp_code) {
1498 case ICMP_TIMXCEED_INTRANS:
1499 printf("Time to live exceeded\n");
1500 break;
1501 case ICMP_TIMXCEED_REASS:
1502 printf("Frag reassembly time exceeded\n");
1503 break;
1504 default:
1505 printf("Time exceeded, Bad Code: %d\n",
1506 icp->icmp_code);
1507 break;
1508 }
1509 #ifndef icmp_data
1510 pr_retip(&icp->icmp_ip);
1511 #else
1512 pr_retip((struct ip *)icp->icmp_data);
1513 #endif
1514 break;
1515 case ICMP_PARAMPROB:
1516 printf("Parameter problem: pointer = 0x%02x\n",
1517 icp->icmp_hun.ih_pptr);
1518 #ifndef icmp_data
1519 pr_retip(&icp->icmp_ip);
1520 #else
1521 pr_retip((struct ip *)icp->icmp_data);
1522 #endif
1523 break;
1524 case ICMP_TSTAMP:
1525 printf("Timestamp\n");
1526 /* XXX ID + Seq + 3 timestamps */
1527 break;
1528 case ICMP_TSTAMPREPLY:
1529 printf("Timestamp Reply\n");
1530 /* XXX ID + Seq + 3 timestamps */
1531 break;
1532 case ICMP_IREQ:
1533 printf("Information Request\n");
1534 /* XXX ID + Seq */
1535 break;
1536 case ICMP_IREQREPLY:
1537 printf("Information Reply\n");
1538 /* XXX ID + Seq */
1539 break;
1540 case ICMP_MASKREQ:
1541 printf("Address Mask Request\n");
1542 break;
1543 case ICMP_MASKREPLY:
1544 printf("Address Mask Reply\n");
1545 break;
1546 case ICMP_ROUTERADVERT:
1547 printf("Router Advertisement\n");
1548 break;
1549 case ICMP_ROUTERSOLICIT:
1550 printf("Router Solicitation\n");
1551 break;
1552 default:
1553 printf("Bad ICMP type: %d\n", icp->icmp_type);
1554 }
1555 }
1556
1557 /*
1558 * pr_iph --
1559 * Print an IP header with options.
1560 */
1561 static void
1562 pr_iph(struct ip *ip)
1563 {
1564 u_char *cp;
1565 int hlen;
1566
1567 hlen = ip->ip_hl << 2;
1568 cp = (u_char *)ip + 20; /* point to options */
1569
1570 printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n");
1571 printf(" %1x %1x %02x %04x %04x",
1572 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len),
1573 ntohs(ip->ip_id));
1574 printf(" %1lx %04lx",
1575 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13,
1576 (u_long) ntohl(ip->ip_off) & 0x1fff);
1577 printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, ntohs(ip->ip_sum));
1578 printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr));
1579 printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr));
1580 /* dump any option bytes */
1581 while (hlen-- > 20) {
1582 printf("%02x", *cp++);
1583 }
1584 putchar('\n');
1585 }
1586
1587 /*
1588 * pr_addr --
1589 * Return an ascii host address as a dotted quad and optionally with
1590 * a hostname.
1591 */
1592 static char *
1593 pr_addr(struct in_addr ina)
1594 {
1595 struct hostent *hp;
1596 static char buf[16 + 3 + MAXHOSTNAMELEN];
1597
1598 if ((options & F_NUMERIC) ||
1599 !(hp = gethostbyaddr((char *)&ina, 4, AF_INET)))
1600 return inet_ntoa(ina);
1601 else
1602 snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name,
1603 inet_ntoa(ina));
1604 return(buf);
1605 }
1606
1607 /*
1608 * pr_retip --
1609 * Dump some info on a returned (via ICMP) IP packet.
1610 */
1611 static void
1612 pr_retip(struct ip *ip)
1613 {
1614 u_char *cp;
1615 int hlen;
1616
1617 pr_iph(ip);
1618 hlen = ip->ip_hl << 2;
1619 cp = (u_char *)ip + hlen;
1620
1621 if (ip->ip_p == 6)
1622 printf("TCP: from port %u, to port %u (decimal)\n",
1623 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
1624 else if (ip->ip_p == 17)
1625 printf("UDP: from port %u, to port %u (decimal)\n",
1626 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
1627 }
1628
1629 static char *
1630 pr_ntime (n_time timestamp)
1631 {
1632 static char buf[10];
1633 int hour, min, sec;
1634
1635 sec = ntohl(timestamp) / 1000;
1636 hour = sec / 60 / 60;
1637 min = (sec % (60 * 60)) / 60;
1638 sec = (sec % (60 * 60)) % 60;
1639
1640 snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec);
1641
1642 return (buf);
1643 }
1644
1645 static void
1646 fill(char *bp, char *patp)
1647 {
1648 char *cp;
1649 int pat[16];
1650 u_int ii, jj, kk;
1651
1652 for (cp = patp; *cp; cp++) {
1653 if (!isxdigit(*cp))
1654 errx(EX_USAGE,
1655 "patterns must be specified as hex digits");
1656
1657 }
1658 ii = sscanf(patp,
1659 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
1660 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
1661 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
1662 &pat[13], &pat[14], &pat[15]);
1663
1664 if (ii > 0)
1665 for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii)
1666 for (jj = 0; jj < ii; ++jj)
1667 bp[jj + kk] = pat[jj];
1668 if (!(options & F_QUIET)) {
1669 printf("PATTERN: 0x");
1670 for (jj = 0; jj < ii; ++jj)
1671 printf("%02x", bp[jj] & 0xFF);
1672 printf("\n");
1673 }
1674 }
1675
1676 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
1677 #define SECOPT " [-P policy]"
1678 #else
1679 #define SECOPT ""
1680 #endif
1681 static void
1682 usage(void)
1683 {
1684
1685 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1686 "usage: ping [-AaDdfnoQqRrv] [-c count] [-G sweepmaxsize] [-g sweepminsize]",
1687 " [-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]",
1688 " " SECOPT " [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]",
1689 " [-W waittime] [-z tos] host",
1690 " ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]",
1691 " [-M mask | time] [-m ttl]" SECOPT " [-p pattern] [-S src_addr]",
1692 " [-s packetsize] [-T ttl] [-t timeout] [-W waittime]",
1693 " [-z tos] mcast-group");
1694 exit(EX_USAGE);
1695 }
DragonFly BSD