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source: rtems-libbsd/freebsd/sbin/ping/ping.c @ 42c9944

4.1155-freebsd-126-freebsd-12freebsd-9.3

Last change on this file since 42c9944 was 42c9944, checked in by Sebastian Huber <sebastian.huber@…>, on 10/31/13 at 08:42:56
PING(8): Use local scope for global variables
Property mode set to `100644`
File size: 45.4 KB

Line
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	#ifdef __rtems__
45	#define __need_getopt_newlib
46	#include <getopt.h>
47	#include <machine/rtems-bsd-program.h>
48	#include <machine/rtems-bsd-commands.h>
49	#endif /* __rtems__ */
50	#include <sys/cdefs.h>
51	__FBSDID("$FreeBSD$");
52
53	/*
54	* P I N G . C
55	*
56	* Using the Internet Control Message Protocol (ICMP) "ECHO" facility,
57	* measure round-trip-delays and packet loss across network paths.
58	*
59	* Author -
60	* Mike Muuss
61	* U. S. Army Ballistic Research Laboratory
62	* December, 1983
63	*
64	* Status -
65	* Public Domain. Distribution Unlimited.
66	* Bugs -
67	* More statistics could always be gathered.
68	* This program has to run SUID to ROOT to access the ICMP socket.
69	*/
70
71	#include <rtems/bsd/sys/param.h> /* NB: we rely on this for <sys/types.h> */
72	#include <sys/socket.h>
73	#include <sys/sysctl.h>
74	#include <rtems/bsd/sys/time.h>
75	#include <sys/uio.h>
76
77	#include <netinet/in.h>
78	#include <netinet/in_systm.h>
79	#include <netinet/ip.h>
80	#include <netinet/ip_icmp.h>
81	#include <netinet/ip_var.h>
82	#include <arpa/inet.h>
83
84	#ifdef IPSEC
85	#include <netipsec/ipsec.h>
86	#endif /IPSEC/
87
88	#include <ctype.h>
89	#include <err.h>
90	#include <errno.h>
91	#include <math.h>
92	#include <netdb.h>
93	#include <signal.h>
94	#include <stdio.h>
95	#include <stdlib.h>
96	#include <string.h>
97	#include <sysexits.h>
98	#include <unistd.h>
99
100	#define INADDR_LEN ((int)sizeof(in_addr_t))
101	#define TIMEVAL_LEN ((int)sizeof(struct tv32))
102	#define MASK_LEN (ICMP_MASKLEN - ICMP_MINLEN)
103	#define TS_LEN (ICMP_TSLEN - ICMP_MINLEN)
104	#define DEFDATALEN 56 /* default data length */
105	#define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */
106	/* runs out of buffer space */
107	#define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN)
108	#define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN)
109	#define MAXWAIT 10000 /* max ms to wait for response */
110	#define MAXALARM (60 * 60) /* max seconds for alarm timeout */
111	#define MAXTOS 255
112
113	#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
114	#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
115	#define SET(bit) (A(bit) \|= B(bit))
116	#define CLR(bit) (A(bit) &= (~B(bit)))
117	#define TST(bit) (A(bit) & B(bit))
118
119	struct tv32 {
120	int32_t tv32_sec;
121	int32_t tv32_usec;
122	};
123
124	/* various options */
125	static int options;
126	#define F_FLOOD 0x0001
127	#define F_INTERVAL 0x0002
128	#define F_NUMERIC 0x0004
129	#define F_PINGFILLED 0x0008
130	#define F_QUIET 0x0010
131	#define F_RROUTE 0x0020
132	#define F_SO_DEBUG 0x0040
133	#define F_SO_DONTROUTE 0x0080
134	#define F_VERBOSE 0x0100
135	#define F_QUIET2 0x0200
136	#define F_NOLOOP 0x0400
137	#define F_MTTL 0x0800
138	#define F_MIF 0x1000
139	#define F_AUDIBLE 0x2000
140	#ifdef IPSEC
141	#ifdef IPSEC_POLICY_IPSEC
142	#define F_POLICY 0x4000
143	#endif /IPSEC_POLICY_IPSEC/
144	#endif /IPSEC/
145	#define F_TTL 0x8000
146	#define F_MISSED 0x10000
147	#define F_ONCE 0x20000
148	#define F_HDRINCL 0x40000
149	#define F_MASK 0x80000
150	#define F_TIME 0x100000
151	#define F_SWEEP 0x200000
152	#define F_WAITTIME 0x400000
153
154	/*
155	* MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
156	* number of received sequence numbers we can keep track of. Change 128
157	* to 8192 for complete accuracy...
158	*/
159	#define MAX_DUP_CHK (8 * 128)
160	static int mx_dup_ck = MAX_DUP_CHK;
161	static char rcvd_tbl[MAX_DUP_CHK / 8];
162
163	static struct sockaddr_in whereto; /* who to ping */
164	static int datalen = DEFDATALEN;
165	static int maxpayload;
166	static int s; /* socket file descriptor */
167	static u_char outpackhdr[IP_MAXPACKET], *outpack;
168	static char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */
169	static char BSPACE = '\b'; /* characters written for flood */
170	static char DOT = '.';
171	static char *hostname;
172	static char *shostname;
173	static int ident; /* process id to identify our packets */
174	static int uid; /* cached uid for micro-optimization */
175	static u_char icmp_type = ICMP_ECHO;
176	static u_char icmp_type_rsp = ICMP_ECHOREPLY;
177	static int phdr_len = 0;
178	static int send_len;
179
180	/* counters */
181	static long nmissedmax; /* max value of ntransmitted - nreceived - 1 */
182	static long npackets; /* max packets to transmit */
183	static long nreceived; /* # of packets we got back */
184	static long nrepeats; /* number of duplicates */
185	static long ntransmitted; /* sequence # for outbound packets = #sent */
186	static long snpackets; /* max packets to transmit in one sweep */
187	static long snreceived; /* # of packets we got back in this sweep */
188	static long sntransmitted; /* # of packets we sent in this sweep */
189	static int sweepmax; /* max value of payload in sweep */
190	static int sweepmin = 0; /* start value of payload in sweep */
191	static int sweepincr = 1; /* payload increment in sweep */
192	static int interval = 1000; /* interval between packets, ms */
193	static int waittime = MAXWAIT; /* timeout for each packet */
194	static long nrcvtimeout = 0; /* # of packets we got back after waittime */
195
196	/* timing */
197	static int timing; /* flag to do timing */
198	static double tmin = 999999999.0; /* minimum round trip time */
199	static double tmax = 0.0; /* maximum round trip time */
200	static double tsum = 0.0; /* sum of all times, for doing average */
201	static double tsumsq = 0.0; /* sum of all times squared, for std. dev. */
202
203	static volatile sig_atomic_t finish_up; /* nonzero if we've been told to finish up */
204	static volatile sig_atomic_t siginfo_p;
205
206	static void fill(char , char );
207	static u_short in_cksum(u_short *, int);
208	static void check_status(void);
209	static void finish(void) __dead2;
210	static void pinger(void);
211	static char *pr_addr(struct in_addr);
212	static char *pr_ntime(n_time);
213	static void pr_icmph(struct icmp *);
214	static void pr_iph(struct ip *);
215	static void pr_pack(char , int, struct sockaddr_in , struct timeval *);
216	static void pr_retip(struct ip *);
217	#ifndef __rtems__
218	static void status(int);
219	static void stopit(int);
220	#endif /* __rtems__ */
221	static void tvsub(struct timeval , struct timeval );
222	static void usage(void) __dead2;
223
224	#ifdef __rtems__
225	static int main(int argc, char **argv);
226
227	int rtems_bsd_command_ping(int argc, char *argv[])
228	{
229	int exit_code;
230
231	rtems_bsd_program_lock();
232
233	BBELL = '\a';
234	BSPACE = '\b';
235	DOT = '.';
236	icmp_type = ICMP_ECHO;
237	icmp_type_rsp = ICMP_ECHOREPLY;
238	phdr_len = 0;
239	sweepmin = 0;
240	sweepincr = 1;
241	interval = 1000;
242	waittime = MAXWAIT;
243	nrcvtimeout = 0;
244	tmin = 999999999.0;
245	tmax = 0.0;
246	tsum = 0.0;
247	tsumsq = 0.0;
248
249	exit_code = rtems_bsd_program_call_main("ping", main, argc, argv);
250
251	rtems_bsd_program_unlock();
252
253	return exit_code;
254	}
255	#endif /* __rtems__ */
256	int
257	main(argc, argv)
258	int argc;
259	#ifndef __rtems__
260	char const argv;
261	#else /* __rtems__ */
262	char **argv;
263	#endif /* __rtems__ */
264	{
265	struct sockaddr_in from, sock_in;
266	struct in_addr ifaddr;
267	struct timeval last, intvl;
268	struct iovec iov;
269	struct ip *ip;
270	struct msghdr msg;
271	struct sigaction si_sa;
272	size_t sz;
273	#ifndef __rtems__
274	u_char *datap, packet[IP_MAXPACKET] __aligned(4);
275	#else /* __rtems__ */
276	u_char *datap;
277	static u_char packet[IP_MAXPACKET] __aligned(4);
278	#endif /* __rtems__ */
279	char ep, source, target, payload;
280	struct hostent *hp;
281	#ifdef IPSEC_POLICY_IPSEC
282	char policy_in, policy_out;
283	#endif
284	struct sockaddr_in *to;
285	double t;
286	u_long alarmtimeout, ultmp;
287	int almost_done, ch, df, hold, i, icmp_len, mib[4], preload, sockerrno,
288	tos, ttl;
289	char ctrl[CMSG_SPACE(sizeof(struct timeval))];
290	#ifndef __rtems__
291	char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN];
292	#else /* __rtems__ */
293	static char hnamebuf[MAXHOSTNAMELEN];
294	static char snamebuf[MAXHOSTNAMELEN];
295	#endif /* __rtems__ */
296	#ifdef IP_OPTIONS
297	char rspace[MAX_IPOPTLEN]; /* record route space */
298	#endif
299	unsigned char loop, mttl;
300	#ifdef __rtems__
301	struct getopt_data getopt_data;
302	memset(&getopt_data, 0, sizeof(getopt_data));
303	#define optind getopt_data.optind
304	#define optarg getopt_data.optarg
305	#define opterr getopt_data.opterr
306	#define optopt getopt_data.optopt
307	#define getopt(argc, argv, opt) getopt_r(argc, argv, opt, &getopt_data)
308	#endif /* __rtems__ */
309
310	payload = source = NULL;
311	#ifdef IPSEC_POLICY_IPSEC
312	policy_in = policy_out = NULL;
313	#endif
314
315	/*
316	* Do the stuff that we need root priv's for first, and
317	* then drop our setuid bit. Save error reporting for
318	* after arg parsing.
319	*/
320	s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
321	sockerrno = errno;
322
323	setuid(getuid());
324	uid = getuid();
325
326	alarmtimeout = df = preload = tos = 0;
327
328	outpack = outpackhdr + sizeof(struct ip);
329	while ((ch = getopt(argc, argv,
330	"Aac:DdfG:g:h:I:i:Ll:M:m:nop:QqRrS:s:T:t:vW:z:"
331	#ifdef IPSEC
332	#ifdef IPSEC_POLICY_IPSEC
333	"P:"
334	#endif /IPSEC_POLICY_IPSEC/
335	#endif /IPSEC/
336	)) != -1)
337	{
338	switch(ch) {
339	case 'A':
340	options \|= F_MISSED;
341	break;
342	case 'a':
343	options \|= F_AUDIBLE;
344	break;
345	case 'c':
346	ultmp = strtoul(optarg, &ep, 0);
347	if (*ep \|\| ep == optarg \|\| ultmp > LONG_MAX \|\| !ultmp)
348	errx(EX_USAGE,
349	"invalid count of packets to transmit: `%s'",
350	optarg);
351	npackets = ultmp;
352	break;
353	case 'D':
354	options \|= F_HDRINCL;
355	df = 1;
356	break;
357	case 'd':
358	options \|= F_SO_DEBUG;
359	break;
360	case 'f':
361	if (uid) {
362	errno = EPERM;
363	err(EX_NOPERM, "-f flag");
364	}
365	options \|= F_FLOOD;
366	setbuf(stdout, (char *)NULL);
367	break;
368	case 'G': /* Maximum packet size for ping sweep */
369	ultmp = strtoul(optarg, &ep, 0);
370	if (*ep \|\| ep == optarg)
371	errx(EX_USAGE, "invalid packet size: `%s'",
372	optarg);
373	if (uid != 0 && ultmp > DEFDATALEN) {
374	errno = EPERM;
375	err(EX_NOPERM,
376	"packet size too large: %lu > %u",
377	ultmp, DEFDATALEN);
378	}
379	options \|= F_SWEEP;
380	sweepmax = ultmp;
381	break;
382	case 'g': /* Minimum packet size for ping sweep */
383	ultmp = strtoul(optarg, &ep, 0);
384	if (*ep \|\| ep == optarg)
385	errx(EX_USAGE, "invalid packet size: `%s'",
386	optarg);
387	if (uid != 0 && ultmp > DEFDATALEN) {
388	errno = EPERM;
389	err(EX_NOPERM,
390	"packet size too large: %lu > %u",
391	ultmp, DEFDATALEN);
392	}
393	options \|= F_SWEEP;
394	sweepmin = ultmp;
395	break;
396	case 'h': /* Packet size increment for ping sweep */
397	ultmp = strtoul(optarg, &ep, 0);
398	if (*ep \|\| ep == optarg \|\| ultmp < 1)
399	errx(EX_USAGE, "invalid increment size: `%s'",
400	optarg);
401	if (uid != 0 && ultmp > DEFDATALEN) {
402	errno = EPERM;
403	err(EX_NOPERM,
404	"packet size too large: %lu > %u",
405	ultmp, DEFDATALEN);
406	}
407	options \|= F_SWEEP;
408	sweepincr = ultmp;
409	break;
410	case 'I': /* multicast interface */
411	if (inet_aton(optarg, &ifaddr) == 0)
412	errx(EX_USAGE,
413	"invalid multicast interface: `%s'",
414	optarg);
415	options \|= F_MIF;
416	break;
417	case 'i': /* wait between sending packets */
418	t = strtod(optarg, &ep) * 1000.0;
419	if (*ep \|\| ep == optarg \|\| t > (double)INT_MAX)
420	errx(EX_USAGE, "invalid timing interval: `%s'",
421	optarg);
422	options \|= F_INTERVAL;
423	interval = (int)t;
424	if (uid && interval < 1000) {
425	errno = EPERM;
426	err(EX_NOPERM, "-i interval too short");
427	}
428	break;
429	case 'L':
430	options \|= F_NOLOOP;
431	loop = 0;
432	break;
433	case 'l':
434	ultmp = strtoul(optarg, &ep, 0);
435	if (*ep \|\| ep == optarg \|\| ultmp > INT_MAX)
436	errx(EX_USAGE,
437	"invalid preload value: `%s'", optarg);
438	if (uid) {
439	errno = EPERM;
440	err(EX_NOPERM, "-l flag");
441	}
442	preload = ultmp;
443	break;
444	case 'M':
445	switch(optarg[0]) {
446	case 'M':
447	case 'm':
448	options \|= F_MASK;
449	break;
450	case 'T':
451	case 't':
452	options \|= F_TIME;
453	break;
454	default:
455	errx(EX_USAGE, "invalid message: `%c'", optarg[0]);
456	break;
457	}
458	break;
459	case 'm': /* TTL */
460	ultmp = strtoul(optarg, &ep, 0);
461	if (*ep \|\| ep == optarg \|\| ultmp > MAXTTL)
462	errx(EX_USAGE, "invalid TTL: `%s'", optarg);
463	ttl = ultmp;
464	options \|= F_TTL;
465	break;
466	case 'n':
467	options \|= F_NUMERIC;
468	break;
469	case 'o':
470	options \|= F_ONCE;
471	break;
472	#ifdef IPSEC
473	#ifdef IPSEC_POLICY_IPSEC
474	case 'P':
475	options \|= F_POLICY;
476	if (!strncmp("in", optarg, 2))
477	policy_in = strdup(optarg);
478	else if (!strncmp("out", optarg, 3))
479	policy_out = strdup(optarg);
480	else
481	errx(1, "invalid security policy");
482	break;
483	#endif /IPSEC_POLICY_IPSEC/
484	#endif /IPSEC/
485	case 'p': /* fill buffer with user pattern */
486	options \|= F_PINGFILLED;
487	payload = optarg;
488	break;
489	case 'Q':
490	options \|= F_QUIET2;
491	break;
492	case 'q':
493	options \|= F_QUIET;
494	break;
495	case 'R':
496	options \|= F_RROUTE;
497	break;
498	case 'r':
499	options \|= F_SO_DONTROUTE;
500	break;
501	case 'S':
502	source = optarg;
503	break;
504	case 's': /* size of packet to send */
505	ultmp = strtoul(optarg, &ep, 0);
506	if (*ep \|\| ep == optarg)
507	errx(EX_USAGE, "invalid packet size: `%s'",
508	optarg);
509	if (uid != 0 && ultmp > DEFDATALEN) {
510	errno = EPERM;
511	err(EX_NOPERM,
512	"packet size too large: %lu > %u",
513	ultmp, DEFDATALEN);
514	}
515	datalen = ultmp;
516	break;
517	case 'T': /* multicast TTL */
518	ultmp = strtoul(optarg, &ep, 0);
519	if (*ep \|\| ep == optarg \|\| ultmp > MAXTTL)
520	errx(EX_USAGE, "invalid multicast TTL: `%s'",
521	optarg);
522	mttl = ultmp;
523	options \|= F_MTTL;
524	break;
525	case 't':
526	alarmtimeout = strtoul(optarg, &ep, 0);
527	if ((alarmtimeout < 1) \|\| (alarmtimeout == ULONG_MAX))
528	errx(EX_USAGE, "invalid timeout: `%s'",
529	optarg);
530	if (alarmtimeout > MAXALARM)
531	errx(EX_USAGE, "invalid timeout: `%s' > %d",
532	optarg, MAXALARM);
533	alarm((int)alarmtimeout);
534	break;
535	case 'v':
536	options \|= F_VERBOSE;
537	break;
538	case 'W': /* wait ms for answer */
539	t = strtod(optarg, &ep);
540	if (*ep \|\| ep == optarg \|\| t > (double)INT_MAX)
541	errx(EX_USAGE, "invalid timing interval: `%s'",
542	optarg);
543	options \|= F_WAITTIME;
544	waittime = (int)t;
545	break;
546	case 'z':
547	options \|= F_HDRINCL;
548	ultmp = strtoul(optarg, &ep, 0);
549	if (*ep \|\| ep == optarg \|\| ultmp > MAXTOS)
550	errx(EX_USAGE, "invalid TOS: `%s'", optarg);
551	tos = ultmp;
552	break;
553	default:
554	usage();
555	}
556	}
557
558	if (argc - optind != 1)
559	usage();
560	target = argv[optind];
561
562	switch (options & (F_MASK\|F_TIME)) {
563	case 0: break;
564	case F_MASK:
565	icmp_type = ICMP_MASKREQ;
566	icmp_type_rsp = ICMP_MASKREPLY;
567	phdr_len = MASK_LEN;
568	if (!(options & F_QUIET))
569	(void)printf("ICMP_MASKREQ\n");
570	break;
571	case F_TIME:
572	icmp_type = ICMP_TSTAMP;
573	icmp_type_rsp = ICMP_TSTAMPREPLY;
574	phdr_len = TS_LEN;
575	if (!(options & F_QUIET))
576	(void)printf("ICMP_TSTAMP\n");
577	break;
578	default:
579	errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive.");
580	break;
581	}
582	icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len;
583	if (options & F_RROUTE)
584	icmp_len += MAX_IPOPTLEN;
585	maxpayload = IP_MAXPACKET - icmp_len;
586	if (datalen > maxpayload)
587	errx(EX_USAGE, "packet size too large: %d > %d", datalen,
588	maxpayload);
589	send_len = icmp_len + datalen;
590	datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN];
591	if (options & F_PINGFILLED) {
592	fill((char *)datap, payload);
593	}
594	if (source) {
595	bzero((char *)&sock_in, sizeof(sock_in));
596	sock_in.sin_family = AF_INET;
597	if (inet_aton(source, &sock_in.sin_addr) != 0) {
598	shostname = source;
599	} else {
600	hp = gethostbyname2(source, AF_INET);
601	if (!hp)
602	errx(EX_NOHOST, "cannot resolve %s: %s",
603	source, hstrerror(h_errno));
604
605	sock_in.sin_len = sizeof sock_in;
606	if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) \|\|
607	hp->h_length < 0)
608	errx(1, "gethostbyname2: illegal address");
609	memcpy(&sock_in.sin_addr, hp->h_addr_list[0],
610	sizeof(sock_in.sin_addr));
611	(void)strncpy(snamebuf, hp->h_name,
612	sizeof(snamebuf) - 1);
613	snamebuf[sizeof(snamebuf) - 1] = '\0';
614	shostname = snamebuf;
615	}
616	if (bind(s, (struct sockaddr *)&sock_in, sizeof sock_in) == -1)
617	err(1, "bind");
618	}
619
620	bzero(&whereto, sizeof(whereto));
621	to = &whereto;
622	to->sin_family = AF_INET;
623	to->sin_len = sizeof *to;
624	if (inet_aton(target, &to->sin_addr) != 0) {
625	hostname = target;
626	} else {
627	hp = gethostbyname2(target, AF_INET);
628	if (!hp)
629	errx(EX_NOHOST, "cannot resolve %s: %s",
630	target, hstrerror(h_errno));
631
632	if ((unsigned)hp->h_length > sizeof(to->sin_addr))
633	errx(1, "gethostbyname2 returned an illegal address");
634	memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr);
635	(void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1);
636	hnamebuf[sizeof(hnamebuf) - 1] = '\0';
637	hostname = hnamebuf;
638	}
639
640	if (options & F_FLOOD && options & F_INTERVAL)
641	errx(EX_USAGE, "-f and -i: incompatible options");
642
643	if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
644	errx(EX_USAGE,
645	"-f flag cannot be used with multicast destination");
646	if (options & (F_MIF \| F_NOLOOP \| F_MTTL)
647	&& !IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
648	errx(EX_USAGE,
649	"-I, -L, -T flags cannot be used with unicast destination");
650
651	if (datalen >= TIMEVAL_LEN) /* can we time transfer */
652	timing = 1;
653
654	if (!(options & F_PINGFILLED))
655	for (i = TIMEVAL_LEN; i < datalen; ++i)
656	*datap++ = i;
657
658	ident = getpid() & 0xFFFF;
659
660	if (s < 0) {
661	errno = sockerrno;
662	err(EX_OSERR, "socket");
663	}
664	hold = 1;
665	if (options & F_SO_DEBUG)
666	(void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
667	sizeof(hold));
668	if (options & F_SO_DONTROUTE)
669	(void)setsockopt(s, SOL_SOCKET, SO_DONTROUTE, (char *)&hold,
670	sizeof(hold));
671	#ifdef IPSEC
672	#ifdef IPSEC_POLICY_IPSEC
673	if (options & F_POLICY) {
674	char *buf;
675	if (policy_in != NULL) {
676	buf = ipsec_set_policy(policy_in, strlen(policy_in));
677	if (buf == NULL)
678	errx(EX_CONFIG, "%s", ipsec_strerror());
679	if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY,
680	buf, ipsec_get_policylen(buf)) < 0)
681	err(EX_CONFIG,
682	"ipsec policy cannot be configured");
683	free(buf);
684	}
685
686	if (policy_out != NULL) {
687	buf = ipsec_set_policy(policy_out, strlen(policy_out));
688	if (buf == NULL)
689	errx(EX_CONFIG, "%s", ipsec_strerror());
690	if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY,
691	buf, ipsec_get_policylen(buf)) < 0)
692	err(EX_CONFIG,
693	"ipsec policy cannot be configured");
694	free(buf);
695	}
696	}
697	#endif /IPSEC_POLICY_IPSEC/
698	#endif /IPSEC/
699
700	if (options & F_HDRINCL) {
701	ip = (struct ip*)outpackhdr;
702	if (!(options & (F_TTL \| F_MTTL))) {
703	mib[0] = CTL_NET;
704	mib[1] = PF_INET;
705	mib[2] = IPPROTO_IP;
706	mib[3] = IPCTL_DEFTTL;
707	sz = sizeof(ttl);
708	if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1)
709	err(1, "sysctl(net.inet.ip.ttl)");
710	}
711	setsockopt(s, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold));
712	ip->ip_v = IPVERSION;
713	ip->ip_hl = sizeof(struct ip) >> 2;
714	ip->ip_tos = tos;
715	ip->ip_id = 0;
716	ip->ip_off = df ? IP_DF : 0;
717	ip->ip_ttl = ttl;
718	ip->ip_p = IPPROTO_ICMP;
719	ip->ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY;
720	ip->ip_dst = to->sin_addr;
721	}
722	/* record route option */
723	if (options & F_RROUTE) {
724	#ifdef IP_OPTIONS
725	bzero(rspace, sizeof(rspace));
726	rspace[IPOPT_OPTVAL] = IPOPT_RR;
727	rspace[IPOPT_OLEN] = sizeof(rspace) - 1;
728	rspace[IPOPT_OFFSET] = IPOPT_MINOFF;
729	rspace[sizeof(rspace) - 1] = IPOPT_EOL;
730	if (setsockopt(s, IPPROTO_IP, IP_OPTIONS, rspace,
731	sizeof(rspace)) < 0)
732	err(EX_OSERR, "setsockopt IP_OPTIONS");
733	#else
734	errx(EX_UNAVAILABLE,
735	"record route not available in this implementation");
736	#endif /* IP_OPTIONS */
737	}
738
739	if (options & F_TTL) {
740	if (setsockopt(s, IPPROTO_IP, IP_TTL, &ttl,
741	sizeof(ttl)) < 0) {
742	err(EX_OSERR, "setsockopt IP_TTL");
743	}
744	}
745	if (options & F_NOLOOP) {
746	if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &loop,
747	sizeof(loop)) < 0) {
748	err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP");
749	}
750	}
751	if (options & F_MTTL) {
752	if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &mttl,
753	sizeof(mttl)) < 0) {
754	err(EX_OSERR, "setsockopt IP_MULTICAST_TTL");
755	}
756	}
757	if (options & F_MIF) {
758	if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr,
759	sizeof(ifaddr)) < 0) {
760	err(EX_OSERR, "setsockopt IP_MULTICAST_IF");
761	}
762	}
763	#ifdef SO_TIMESTAMP
764	{ int on = 1;
765	if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)) < 0)
766	err(EX_OSERR, "setsockopt SO_TIMESTAMP");
767	}
768	#endif
769	if (sweepmax) {
770	if (sweepmin >= sweepmax)
771	errx(EX_USAGE, "Maximum packet size must be greater than the minimum packet size");
772
773	if (datalen != DEFDATALEN)
774	errx(EX_USAGE, "Packet size and ping sweep are mutually exclusive");
775
776	if (npackets > 0) {
777	snpackets = npackets;
778	npackets = 0;
779	} else
780	snpackets = 1;
781	datalen = sweepmin;
782	send_len = icmp_len + sweepmin;
783	}
784	if (options & F_SWEEP && !sweepmax)
785	errx(EX_USAGE, "Maximum sweep size must be specified");
786
787	/*
788	* When pinging the broadcast address, you can get a lot of answers.
789	* Doing something so evil is useful if you are trying to stress the
790	* ethernet, or just want to fill the arp cache to get some stuff for
791	* /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast
792	* or multicast pings if they wish.
793	*/
794
795	/*
796	* XXX receive buffer needs undetermined space for mbuf overhead
797	* as well.
798	*/
799	hold = IP_MAXPACKET + 128;
800	(void)setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
801	sizeof(hold));
802	if (uid == 0)
803	(void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char *)&hold,
804	sizeof(hold));
805
806	if (to->sin_family == AF_INET) {
807	(void)printf("PING %s (%s)", hostname,
808	inet_ntoa(to->sin_addr));
809	if (source)
810	(void)printf(" from %s", shostname);
811	if (sweepmax)
812	(void)printf(": (%d ... %d) data bytes\n",
813	sweepmin, sweepmax);
814	else
815	(void)printf(": %d data bytes\n", datalen);
816
817	} else {
818	if (sweepmax)
819	(void)printf("PING %s: (%d ... %d) data bytes\n",
820	hostname, sweepmin, sweepmax);
821	else
822	(void)printf("PING %s: %d data bytes\n", hostname, datalen);
823	}
824
825	#ifndef __rtems__
826	/*
827	* Use sigaction() instead of signal() to get unambiguous semantics,
828	* in particular with SA_RESTART not set.
829	*/
830
831	sigemptyset(&si_sa.sa_mask);
832	si_sa.sa_flags = 0;
833
834	si_sa.sa_handler = stopit;
835	if (sigaction(SIGINT, &si_sa, 0) == -1) {
836	err(EX_OSERR, "sigaction SIGINT");
837	}
838
839	si_sa.sa_handler = status;
840	if (sigaction(SIGINFO, &si_sa, 0) == -1) {
841	err(EX_OSERR, "sigaction");
842	}
843
844	if (alarmtimeout > 0) {
845	si_sa.sa_handler = stopit;
846	if (sigaction(SIGALRM, &si_sa, 0) == -1)
847	err(EX_OSERR, "sigaction SIGALRM");
848	}
849	#else /* __rtems__ */
850	(void) si_sa;
851	#endif /* __rtems__ */
852
853	bzero(&msg, sizeof(msg));
854	msg.msg_name = (caddr_t)&from;
855	msg.msg_iov = &iov;
856	msg.msg_iovlen = 1;
857	#ifdef SO_TIMESTAMP
858	msg.msg_control = (caddr_t)ctrl;
859	#endif
860	iov.iov_base = packet;
861	iov.iov_len = IP_MAXPACKET;
862
863	if (preload == 0)
864	pinger(); /* send the first ping */
865	else {
866	if (npackets != 0 && preload > npackets)
867	preload = npackets;
868	while (preload--) /* fire off them quickies */
869	pinger();
870	}
871	(void)gettimeofday(&last, NULL);
872
873	if (options & F_FLOOD) {
874	intvl.tv_sec = 0;
875	intvl.tv_usec = 10000;
876	} else {
877	intvl.tv_sec = interval / 1000;
878	intvl.tv_usec = interval % 1000 * 1000;
879	}
880
881	almost_done = 0;
882	while (!finish_up) {
883	struct timeval now, timeout;
884	fd_set rfds;
885	int cc, n;
886
887	check_status();
888	if ((unsigned)s >= FD_SETSIZE)
889	errx(EX_OSERR, "descriptor too large");
890	FD_ZERO(&rfds);
891	FD_SET(s, &rfds);
892	(void)gettimeofday(&now, NULL);
893	timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
894	timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
895	while (timeout.tv_usec < 0) {
896	timeout.tv_usec += 1000000;
897	timeout.tv_sec--;
898	}
899	while (timeout.tv_usec >= 1000000) {
900	timeout.tv_usec -= 1000000;
901	timeout.tv_sec++;
902	}
903	if (timeout.tv_sec < 0)
904	timeout.tv_sec = timeout.tv_usec = 0;
905	n = select(s + 1, &rfds, NULL, NULL, &timeout);
906	if (n < 0)
907	continue; /* Must be EINTR. */
908	if (n == 1) {
909	struct timeval *tv = NULL;
910	#ifdef SO_TIMESTAMP
911	struct cmsghdr cmsg = (struct cmsghdr )&ctrl;
912
913	msg.msg_controllen = sizeof(ctrl);
914	#endif
915	msg.msg_namelen = sizeof(from);
916	if ((cc = recvmsg(s, &msg, 0)) < 0) {
917	if (errno == EINTR)
918	continue;
919	warn("recvmsg");
920	continue;
921	}
922	#ifdef SO_TIMESTAMP
923	if (cmsg->cmsg_level == SOL_SOCKET &&
924	cmsg->cmsg_type == SCM_TIMESTAMP &&
925	cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) {
926	/* Copy to avoid alignment problems: */
927	memcpy(&now, CMSG_DATA(cmsg), sizeof(now));
928	tv = &now;
929	}
930	#endif
931	if (tv == NULL) {
932	(void)gettimeofday(&now, NULL);
933	tv = &now;
934	}
935	pr_pack((char *)packet, cc, &from, tv);
936	if ((options & F_ONCE && nreceived) \|\|
937	(npackets && nreceived >= npackets))
938	break;
939	}
940	if (n == 0 \|\| options & F_FLOOD) {
941	if (sweepmax && sntransmitted == snpackets) {
942	for (i = 0; i < sweepincr ; ++i)
943	*datap++ = i;
944	datalen += sweepincr;
945	if (datalen > sweepmax)
946	break;
947	send_len = icmp_len + datalen;
948	sntransmitted = 0;
949	}
950	if (!npackets \|\| ntransmitted < npackets)
951	pinger();
952	else {
953	if (almost_done)
954	break;
955	almost_done = 1;
956	intvl.tv_usec = 0;
957	if (nreceived) {
958	intvl.tv_sec = 2 * tmax / 1000;
959	if (!intvl.tv_sec)
960	intvl.tv_sec = 1;
961	} else {
962	intvl.tv_sec = waittime / 1000;
963	intvl.tv_usec = waittime % 1000 * 1000;
964	}
965	}
966	(void)gettimeofday(&last, NULL);
967	if (ntransmitted - nreceived - 1 > nmissedmax) {
968	nmissedmax = ntransmitted - nreceived - 1;
969	if (options & F_MISSED)
970	(void)write(STDOUT_FILENO, &BBELL, 1);
971	}
972	}
973	}
974	finish();
975	/* NOTREACHED */
976	exit(0); /* Make the compiler happy */
977	}
978
979	#ifndef __rtems__
980	/*
981	* stopit --
982	* Set the global bit that causes the main loop to quit.
983	* Do NOT call finish() from here, since finish() does far too much
984	* to be called from a signal handler.
985	*/
986	void
987	stopit(sig)
988	int sig __unused;
989	{
990
991	/*
992	* When doing reverse DNS lookups, the finish_up flag might not
993	* be noticed for a while. Just exit if we get a second SIGINT.
994	*/
995	if (!(options & F_NUMERIC) && finish_up)
996	_exit(nreceived ? 0 : 2);
997	finish_up = 1;
998	}
999	#endif /* __rtems__ */
1000
1001	/*
1002	* pinger --
1003	* Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
1004	* will be added on by the kernel. The ID field is our UNIX process ID,
1005	* and the sequence number is an ascending integer. The first TIMEVAL_LEN
1006	* bytes of the data portion are used to hold a UNIX "timeval" struct in
1007	* host byte-order, to compute the round-trip time.
1008	*/
1009	static void
1010	pinger(void)
1011	{
1012	struct timeval now;
1013	struct tv32 tv32;
1014	struct ip *ip;
1015	struct icmp *icp;
1016	int cc, i;
1017	u_char *packet;
1018
1019	packet = outpack;
1020	icp = (struct icmp *)outpack;
1021	icp->icmp_type = icmp_type;
1022	icp->icmp_code = 0;
1023	icp->icmp_cksum = 0;
1024	icp->icmp_seq = htons(ntransmitted);
1025	icp->icmp_id = ident; /* ID */
1026
1027	CLR(ntransmitted % mx_dup_ck);
1028
1029	if ((options & F_TIME) \|\| timing) {
1030	(void)gettimeofday(&now, NULL);
1031
1032	tv32.tv32_sec = htonl(now.tv_sec);
1033	tv32.tv32_usec = htonl(now.tv_usec);
1034	if (options & F_TIME)
1035	icp->icmp_otime = htonl((now.tv_sec % (246060))
1036	* 1000 + now.tv_usec / 1000);
1037	if (timing)
1038	bcopy((void *)&tv32,
1039	(void *)&outpack[ICMP_MINLEN + phdr_len],
1040	sizeof(tv32));
1041	}
1042
1043	cc = ICMP_MINLEN + phdr_len + datalen;
1044
1045	/* compute ICMP checksum here */
1046	icp->icmp_cksum = in_cksum((u_short *)icp, cc);
1047
1048	if (options & F_HDRINCL) {
1049	cc += sizeof(struct ip);
1050	ip = (struct ip *)outpackhdr;
1051	ip->ip_len = cc;
1052	ip->ip_sum = in_cksum((u_short *)outpackhdr, cc);
1053	packet = outpackhdr;
1054	}
1055	i = sendto(s, (char )packet, cc, 0, (struct sockaddr )&whereto,
1056	sizeof(whereto));
1057
1058	if (i < 0 \|\| i != cc) {
1059	if (i < 0) {
1060	if (options & F_FLOOD && errno == ENOBUFS) {
1061	usleep(FLOOD_BACKOFF);
1062	return;
1063	}
1064	warn("sendto");
1065	} else {
1066	warn("%s: partial write: %d of %d bytes",
1067	hostname, i, cc);
1068	}
1069	}
1070	ntransmitted++;
1071	sntransmitted++;
1072	if (!(options & F_QUIET) && options & F_FLOOD)
1073	(void)write(STDOUT_FILENO, &DOT, 1);
1074	}
1075
1076	/*
1077	* pr_pack --
1078	* Print out the packet, if it came from us. This logic is necessary
1079	* because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1080	* which arrive ('tis only fair). This permits multiple copies of this
1081	* program to be run without having intermingled output (or statistics!).
1082	*/
1083	static void
1084	pr_pack(buf, cc, from, tv)
1085	char *buf;
1086	int cc;
1087	struct sockaddr_in *from;
1088	struct timeval *tv;
1089	{
1090	struct in_addr ina;
1091	u_char cp, dp;
1092	struct icmp *icp;
1093	struct ip *ip;
1094	const void *tp;
1095	double triptime;
1096	int dupflag, hlen, i, j, recv_len, seq;
1097	static int old_rrlen;
1098	static char old_rr[MAX_IPOPTLEN];
1099
1100	/* Check the IP header */
1101	ip = (struct ip *)buf;
1102	hlen = ip->ip_hl << 2;
1103	recv_len = cc;
1104	if (cc < hlen + ICMP_MINLEN) {
1105	if (options & F_VERBOSE)
1106	warn("packet too short (%d bytes) from %s", cc,
1107	inet_ntoa(from->sin_addr));
1108	return;
1109	}
1110
1111	/* Now the ICMP part */
1112	cc -= hlen;
1113	icp = (struct icmp *)(buf + hlen);
1114	if (icp->icmp_type == icmp_type_rsp) {
1115	if (icp->icmp_id != ident)
1116	return; /* 'Twas not our ECHO */
1117	++nreceived;
1118	triptime = 0.0;
1119	if (timing) {
1120	struct timeval tv1;
1121	struct tv32 tv32;
1122	#ifndef icmp_data
1123	tp = &icp->icmp_ip;
1124	#else
1125	tp = icp->icmp_data;
1126	#endif
1127	tp = (const char *)tp + phdr_len;
1128
1129	if (cc - ICMP_MINLEN - phdr_len >= sizeof(tv1)) {
1130	/* Copy to avoid alignment problems: */
1131	memcpy(&tv32, tp, sizeof(tv32));
1132	tv1.tv_sec = ntohl(tv32.tv32_sec);
1133	tv1.tv_usec = ntohl(tv32.tv32_usec);
1134	tvsub(tv, &tv1);
1135	triptime = ((double)tv->tv_sec) * 1000.0 +
1136	((double)tv->tv_usec) / 1000.0;
1137	tsum += triptime;
1138	tsumsq += triptime * triptime;
1139	if (triptime < tmin)
1140	tmin = triptime;
1141	if (triptime > tmax)
1142	tmax = triptime;
1143	} else
1144	timing = 0;
1145	}
1146
1147	seq = ntohs(icp->icmp_seq);
1148
1149	if (TST(seq % mx_dup_ck)) {
1150	++nrepeats;
1151	--nreceived;
1152	dupflag = 1;
1153	} else {
1154	SET(seq % mx_dup_ck);
1155	dupflag = 0;
1156	}
1157
1158	if (options & F_QUIET)
1159	return;
1160
1161	if (options & F_WAITTIME && triptime > waittime) {
1162	++nrcvtimeout;
1163	return;
1164	}
1165
1166	if (options & F_FLOOD)
1167	(void)write(STDOUT_FILENO, &BSPACE, 1);
1168	else {
1169	(void)printf("%d bytes from %s: icmp_seq=%u", cc,
1170	inet_ntoa((struct in_addr )&from->sin_addr.s_addr),
1171	seq);
1172	(void)printf(" ttl=%d", ip->ip_ttl);
1173	if (timing)
1174	(void)printf(" time=%.3f ms", triptime);
1175	if (dupflag)
1176	(void)printf(" (DUP!)");
1177	if (options & F_AUDIBLE)
1178	(void)write(STDOUT_FILENO, &BBELL, 1);
1179	if (options & F_MASK) {
1180	/* Just prentend this cast isn't ugly */
1181	(void)printf(" mask=%s",
1182	pr_addr((struct in_addr )&(icp->icmp_mask)));
1183	}
1184	if (options & F_TIME) {
1185	(void)printf(" tso=%s", pr_ntime(icp->icmp_otime));
1186	(void)printf(" tsr=%s", pr_ntime(icp->icmp_rtime));
1187	(void)printf(" tst=%s", pr_ntime(icp->icmp_ttime));
1188	}
1189	if (recv_len != send_len) {
1190	(void)printf(
1191	"\nwrong total length %d instead of %d",
1192	recv_len, send_len);
1193	}
1194	/* check the data */
1195	cp = (u_char*)&icp->icmp_data[phdr_len];
1196	dp = &outpack[ICMP_MINLEN + phdr_len];
1197	cc -= ICMP_MINLEN + phdr_len;
1198	i = 0;
1199	if (timing) { /* don't check variable timestamp */
1200	cp += TIMEVAL_LEN;
1201	dp += TIMEVAL_LEN;
1202	cc -= TIMEVAL_LEN;
1203	i += TIMEVAL_LEN;
1204	}
1205	for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) {
1206	if (cp != dp) {
1207	(void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x",
1208	i, dp, cp);
1209	(void)printf("\ncp:");
1210	cp = (u_char*)&icp->icmp_data[0];
1211	for (i = 0; i < datalen; ++i, ++cp) {
1212	if ((i % 16) == 8)
1213	(void)printf("\n\t");
1214	(void)printf("%2x ", *cp);
1215	}
1216	(void)printf("\ndp:");
1217	cp = &outpack[ICMP_MINLEN];
1218	for (i = 0; i < datalen; ++i, ++cp) {
1219	if ((i % 16) == 8)
1220	(void)printf("\n\t");
1221	(void)printf("%2x ", *cp);
1222	}
1223	break;
1224	}
1225	}
1226	}
1227	} else {
1228	/*
1229	* We've got something other than an ECHOREPLY.
1230	* See if it's a reply to something that we sent.
1231	* We can compare IP destination, protocol,
1232	* and ICMP type and ID.
1233	*
1234	* Only print all the error messages if we are running
1235	* as root to avoid leaking information not normally
1236	* available to those not running as root.
1237	*/
1238	#ifndef icmp_data
1239	struct ip *oip = &icp->icmp_ip;
1240	#else
1241	struct ip oip = (struct ip )icp->icmp_data;
1242	#endif
1243	struct icmp oicmp = (struct icmp )(oip + 1);
1244
1245	if (((options & F_VERBOSE) && uid == 0) \|\|
1246	(!(options & F_QUIET2) &&
1247	(oip->ip_dst.s_addr == whereto.sin_addr.s_addr) &&
1248	(oip->ip_p == IPPROTO_ICMP) &&
1249	(oicmp->icmp_type == ICMP_ECHO) &&
1250	(oicmp->icmp_id == ident))) {
1251	(void)printf("%d bytes from %s: ", cc,
1252	pr_addr(from->sin_addr));
1253	pr_icmph(icp);
1254	} else
1255	return;
1256	}
1257
1258	/* Display any IP options */
1259	cp = (u_char *)buf + sizeof(struct ip);
1260
1261	for (; hlen > (int)sizeof(struct ip); --hlen, ++cp)
1262	switch (*cp) {
1263	case IPOPT_EOL:
1264	hlen = 0;
1265	break;
1266	case IPOPT_LSRR:
1267	case IPOPT_SSRR:
1268	(void)printf(*cp == IPOPT_LSRR ?
1269	"\nLSRR: " : "\nSSRR: ");
1270	j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1;
1271	hlen -= 2;
1272	cp += 2;
1273	if (j >= INADDR_LEN &&
1274	j <= hlen - (int)sizeof(struct ip)) {
1275	for (;;) {
1276	bcopy(++cp, &ina.s_addr, INADDR_LEN);
1277	if (ina.s_addr == 0)
1278	(void)printf("\t0.0.0.0");
1279	else
1280	(void)printf("\t%s",
1281	pr_addr(ina));
1282	hlen -= INADDR_LEN;
1283	cp += INADDR_LEN - 1;
1284	j -= INADDR_LEN;
1285	if (j < INADDR_LEN)
1286	break;
1287	(void)putchar('\n');
1288	}
1289	} else
1290	(void)printf("\t(truncated route)\n");
1291	break;
1292	case IPOPT_RR:
1293	j = cp[IPOPT_OLEN]; /* get length */
1294	i = cp[IPOPT_OFFSET]; /* and pointer */
1295	hlen -= 2;
1296	cp += 2;
1297	if (i > j)
1298	i = j;
1299	i = i - IPOPT_MINOFF + 1;
1300	if (i < 0 \|\| i > (hlen - (int)sizeof(struct ip))) {
1301	old_rrlen = 0;
1302	continue;
1303	}
1304	if (i == old_rrlen
1305	&& !bcmp((char *)cp, old_rr, i)
1306	&& !(options & F_FLOOD)) {
1307	(void)printf("\t(same route)");
1308	hlen -= i;
1309	cp += i;
1310	break;
1311	}
1312	old_rrlen = i;
1313	bcopy((char *)cp, old_rr, i);
1314	(void)printf("\nRR: ");
1315	if (i >= INADDR_LEN &&
1316	i <= hlen - (int)sizeof(struct ip)) {
1317	for (;;) {
1318	bcopy(++cp, &ina.s_addr, INADDR_LEN);
1319	if (ina.s_addr == 0)
1320	(void)printf("\t0.0.0.0");
1321	else
1322	(void)printf("\t%s",
1323	pr_addr(ina));
1324	hlen -= INADDR_LEN;
1325	cp += INADDR_LEN - 1;
1326	i -= INADDR_LEN;
1327	if (i < INADDR_LEN)
1328	break;
1329	(void)putchar('\n');
1330	}
1331	} else
1332	(void)printf("\t(truncated route)");
1333	break;
1334	case IPOPT_NOP:
1335	(void)printf("\nNOP");
1336	break;
1337	default:
1338	(void)printf("\nunknown option %x", *cp);
1339	break;
1340	}
1341	if (!(options & F_FLOOD)) {
1342	(void)putchar('\n');
1343	(void)fflush(stdout);
1344	}
1345	}
1346
1347	/*
1348	* in_cksum --
1349	* Checksum routine for Internet Protocol family headers (C Version)
1350	*/
1351	u_short
1352	in_cksum(addr, len)
1353	u_short *addr;
1354	int len;
1355	{
1356	int nleft, sum;
1357	u_short *w;
1358	union {
1359	u_short us;
1360	u_char uc[2];
1361	} last;
1362	u_short answer;
1363
1364	nleft = len;
1365	sum = 0;
1366	w = addr;
1367
1368	/*
1369	* Our algorithm is simple, using a 32 bit accumulator (sum), we add
1370	* sequential 16 bit words to it, and at the end, fold back all the
1371	* carry bits from the top 16 bits into the lower 16 bits.
1372	*/
1373	while (nleft > 1) {
1374	sum += *w++;
1375	nleft -= 2;
1376	}
1377
1378	/* mop up an odd byte, if necessary */
1379	if (nleft == 1) {
1380	last.uc[0] = (u_char )w;
1381	last.uc[1] = 0;
1382	sum += last.us;
1383	}
1384
1385	/* add back carry outs from top 16 bits to low 16 bits */
1386	sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */
1387	sum += (sum >> 16); /* add carry */
1388	answer = ~sum; /* truncate to 16 bits */
1389	return(answer);
1390	}
1391
1392	/*
1393	* tvsub --
1394	* Subtract 2 timeval structs: out = out - in. Out is assumed to
1395	* be >= in.
1396	*/
1397	static void
1398	tvsub(out, in)
1399	struct timeval out, in;
1400	{
1401
1402	if ((out->tv_usec -= in->tv_usec) < 0) {
1403	--out->tv_sec;
1404	out->tv_usec += 1000000;
1405	}
1406	out->tv_sec -= in->tv_sec;
1407	}
1408
1409	#ifndef __rtems__
1410	/*
1411	* status --
1412	* Print out statistics when SIGINFO is received.
1413	*/
1414
1415	static void
1416	status(sig)
1417	int sig __unused;
1418	{
1419
1420	siginfo_p = 1;
1421	}
1422	#endif /* __rtems__ */
1423
1424	static void
1425	check_status()
1426	{
1427
1428	if (siginfo_p) {
1429	siginfo_p = 0;
1430	(void)fprintf(stderr, "\r%ld/%ld packets received (%.1f%%)",
1431	nreceived, ntransmitted,
1432	ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0);
1433	if (nreceived && timing)
1434	(void)fprintf(stderr, " %.3f min / %.3f avg / %.3f max",
1435	tmin, tsum / (nreceived + nrepeats), tmax);
1436	(void)fprintf(stderr, "\n");
1437	}
1438	}
1439
1440	/*
1441	* finish --
1442	* Print out statistics, and give up.
1443	*/
1444	static void
1445	finish()
1446	{
1447
1448	(void)signal(SIGINT, SIG_IGN);
1449	(void)signal(SIGALRM, SIG_IGN);
1450	(void)putchar('\n');
1451	(void)fflush(stdout);
1452	(void)printf("--- %s ping statistics ---\n", hostname);
1453	(void)printf("%ld packets transmitted, ", ntransmitted);
1454	(void)printf("%ld packets received, ", nreceived);
1455	if (nrepeats)
1456	(void)printf("+%ld duplicates, ", nrepeats);
1457	if (ntransmitted) {
1458	if (nreceived > ntransmitted)
1459	(void)printf("-- somebody's printing up packets!");
1460	else
1461	(void)printf("%.1f%% packet loss",
1462	((ntransmitted - nreceived) * 100.0) /
1463	ntransmitted);
1464	}
1465	if (nrcvtimeout)
1466	(void)printf(", %ld packets out of wait time", nrcvtimeout);
1467	(void)putchar('\n');
1468	if (nreceived && timing) {
1469	double n = nreceived + nrepeats;
1470	double avg = tsum / n;
1471	double vari = tsumsq / n - avg * avg;
1472	(void)printf(
1473	"round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n",
1474	tmin, avg, tmax, sqrt(vari));
1475	}
1476
1477	if (nreceived)
1478	exit(0);
1479	else
1480	exit(2);
1481	}
1482
1483	#ifdef notdef
1484	static char *ttab[] = {
1485	"Echo Reply", /* ip + seq + udata */
1486	"Dest Unreachable", /* net, host, proto, port, frag, sr + IP */
1487	"Source Quench", /* IP */
1488	"Redirect", /* redirect type, gateway, + IP */
1489	"Echo",
1490	"Time Exceeded", /* transit, frag reassem + IP */
1491	"Parameter Problem", /* pointer + IP */
1492	"Timestamp", /* id + seq + three timestamps */
1493	"Timestamp Reply", /* " */
1494	"Info Request", /* id + sq */
1495	"Info Reply" /* " */
1496	};
1497	#endif
1498
1499	/*
1500	* pr_icmph --
1501	* Print a descriptive string about an ICMP header.
1502	*/
1503	static void
1504	pr_icmph(icp)
1505	struct icmp *icp;
1506	{
1507
1508	switch(icp->icmp_type) {
1509	case ICMP_ECHOREPLY:
1510	(void)printf("Echo Reply\n");
1511	/* XXX ID + Seq + Data */
1512	break;
1513	case ICMP_UNREACH:
1514	switch(icp->icmp_code) {
1515	case ICMP_UNREACH_NET:
1516	(void)printf("Destination Net Unreachable\n");
1517	break;
1518	case ICMP_UNREACH_HOST:
1519	(void)printf("Destination Host Unreachable\n");
1520	break;
1521	case ICMP_UNREACH_PROTOCOL:
1522	(void)printf("Destination Protocol Unreachable\n");
1523	break;
1524	case ICMP_UNREACH_PORT:
1525	(void)printf("Destination Port Unreachable\n");
1526	break;
1527	case ICMP_UNREACH_NEEDFRAG:
1528	(void)printf("frag needed and DF set (MTU %d)\n",
1529	ntohs(icp->icmp_nextmtu));
1530	break;
1531	case ICMP_UNREACH_SRCFAIL:
1532	(void)printf("Source Route Failed\n");
1533	break;
1534	case ICMP_UNREACH_FILTER_PROHIB:
1535	(void)printf("Communication prohibited by filter\n");
1536	break;
1537	default:
1538	(void)printf("Dest Unreachable, Bad Code: %d\n",
1539	icp->icmp_code);
1540	break;
1541	}
1542	/* Print returned IP header information */
1543	#ifndef icmp_data
1544	pr_retip(&icp->icmp_ip);
1545	#else
1546	pr_retip((struct ip *)icp->icmp_data);
1547	#endif
1548	break;
1549	case ICMP_SOURCEQUENCH:
1550	(void)printf("Source Quench\n");
1551	#ifndef icmp_data
1552	pr_retip(&icp->icmp_ip);
1553	#else
1554	pr_retip((struct ip *)icp->icmp_data);
1555	#endif
1556	break;
1557	case ICMP_REDIRECT:
1558	switch(icp->icmp_code) {
1559	case ICMP_REDIRECT_NET:
1560	(void)printf("Redirect Network");
1561	break;
1562	case ICMP_REDIRECT_HOST:
1563	(void)printf("Redirect Host");
1564	break;
1565	case ICMP_REDIRECT_TOSNET:
1566	(void)printf("Redirect Type of Service and Network");
1567	break;
1568	case ICMP_REDIRECT_TOSHOST:
1569	(void)printf("Redirect Type of Service and Host");
1570	break;
1571	default:
1572	(void)printf("Redirect, Bad Code: %d", icp->icmp_code);
1573	break;
1574	}
1575	(void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr));
1576	#ifndef icmp_data
1577	pr_retip(&icp->icmp_ip);
1578	#else
1579	pr_retip((struct ip *)icp->icmp_data);
1580	#endif
1581	break;
1582	case ICMP_ECHO:
1583	(void)printf("Echo Request\n");
1584	/* XXX ID + Seq + Data */
1585	break;
1586	case ICMP_TIMXCEED:
1587	switch(icp->icmp_code) {
1588	case ICMP_TIMXCEED_INTRANS:
1589	(void)printf("Time to live exceeded\n");
1590	break;
1591	case ICMP_TIMXCEED_REASS:
1592	(void)printf("Frag reassembly time exceeded\n");
1593	break;
1594	default:
1595	(void)printf("Time exceeded, Bad Code: %d\n",
1596	icp->icmp_code);
1597	break;
1598	}
1599	#ifndef icmp_data
1600	pr_retip(&icp->icmp_ip);
1601	#else
1602	pr_retip((struct ip *)icp->icmp_data);
1603	#endif
1604	break;
1605	case ICMP_PARAMPROB:
1606	(void)printf("Parameter problem: pointer = 0x%02x\n",
1607	icp->icmp_hun.ih_pptr);
1608	#ifndef icmp_data
1609	pr_retip(&icp->icmp_ip);
1610	#else
1611	pr_retip((struct ip *)icp->icmp_data);
1612	#endif
1613	break;
1614	case ICMP_TSTAMP:
1615	(void)printf("Timestamp\n");
1616	/* XXX ID + Seq + 3 timestamps */
1617	break;
1618	case ICMP_TSTAMPREPLY:
1619	(void)printf("Timestamp Reply\n");
1620	/* XXX ID + Seq + 3 timestamps */
1621	break;
1622	case ICMP_IREQ:
1623	(void)printf("Information Request\n");
1624	/* XXX ID + Seq */
1625	break;
1626	case ICMP_IREQREPLY:
1627	(void)printf("Information Reply\n");
1628	/* XXX ID + Seq */
1629	break;
1630	case ICMP_MASKREQ:
1631	(void)printf("Address Mask Request\n");
1632	break;
1633	case ICMP_MASKREPLY:
1634	(void)printf("Address Mask Reply\n");
1635	break;
1636	case ICMP_ROUTERADVERT:
1637	(void)printf("Router Advertisement\n");
1638	break;
1639	case ICMP_ROUTERSOLICIT:
1640	(void)printf("Router Solicitation\n");
1641	break;
1642	default:
1643	(void)printf("Bad ICMP type: %d\n", icp->icmp_type);
1644	}
1645	}
1646
1647	/*
1648	* pr_iph --
1649	* Print an IP header with options.
1650	*/
1651	static void
1652	pr_iph(ip)
1653	struct ip *ip;
1654	{
1655	u_char *cp;
1656	int hlen;
1657
1658	hlen = ip->ip_hl << 2;
1659	cp = (u_char )ip + 20; / point to options */
1660
1661	(void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n");
1662	(void)printf(" %1x %1x %02x %04x %04x",
1663	ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len),
1664	ntohs(ip->ip_id));
1665	(void)printf(" %1lx %04lx",
1666	(u_long) (ntohl(ip->ip_off) & 0xe000) >> 13,
1667	(u_long) ntohl(ip->ip_off) & 0x1fff);
1668	(void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p,
1669	ntohs(ip->ip_sum));
1670	(void)printf(" %s ", inet_ntoa((struct in_addr )&ip->ip_src.s_addr));
1671	(void)printf(" %s ", inet_ntoa((struct in_addr )&ip->ip_dst.s_addr));
1672	/* dump any option bytes */
1673	while (hlen-- > 20) {
1674	(void)printf("%02x", *cp++);
1675	}
1676	(void)putchar('\n');
1677	}
1678
1679	/*
1680	* pr_addr --
1681	* Return an ascii host address as a dotted quad and optionally with
1682	* a hostname.
1683	*/
1684	static char *
1685	pr_addr(ina)
1686	struct in_addr ina;
1687	{
1688	struct hostent *hp;
1689	static char buf[16 + 3 + MAXHOSTNAMELEN];
1690
1691	if ((options & F_NUMERIC) \|\|
1692	!(hp = gethostbyaddr((char *)&ina, 4, AF_INET)))
1693	return inet_ntoa(ina);
1694	else
1695	(void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name,
1696	inet_ntoa(ina));
1697	return(buf);
1698	}
1699
1700	/*
1701	* pr_retip --
1702	* Dump some info on a returned (via ICMP) IP packet.
1703	*/
1704	static void
1705	pr_retip(ip)
1706	struct ip *ip;
1707	{
1708	u_char *cp;
1709	int hlen;
1710
1711	pr_iph(ip);
1712	hlen = ip->ip_hl << 2;
1713	cp = (u_char *)ip + hlen;
1714
1715	if (ip->ip_p == 6)
1716	(void)printf("TCP: from port %u, to port %u (decimal)\n",
1717	(cp 256 + (cp + 1)), ((cp + 2) * 256 + *(cp + 3)));
1718	else if (ip->ip_p == 17)
1719	(void)printf("UDP: from port %u, to port %u (decimal)\n",
1720	(cp 256 + (cp + 1)), ((cp + 2) * 256 + *(cp + 3)));
1721	}
1722
1723	static char *
1724	pr_ntime (n_time timestamp)
1725	{
1726	static char buf[10];
1727	int hour, min, sec;
1728
1729	sec = ntohl(timestamp) / 1000;
1730	hour = sec / 60 / 60;
1731	min = (sec % (60 * 60)) / 60;
1732	sec = (sec % (60 * 60)) % 60;
1733
1734	(void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec);
1735
1736	return (buf);
1737	}
1738
1739	static void
1740	fill(bp, patp)
1741	char bp, patp;
1742	{
1743	char *cp;
1744	int pat[16];
1745	u_int ii, jj, kk;
1746
1747	for (cp = patp; *cp; cp++) {
1748	if (!isxdigit((unsigned char) *cp))
1749	errx(EX_USAGE,
1750	"patterns must be specified as hex digits");
1751
1752	}
1753	ii = sscanf(patp,
1754	"%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
1755	&pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
1756	&pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
1757	&pat[13], &pat[14], &pat[15]);
1758
1759	if (ii > 0)
1760	for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii)
1761	for (jj = 0; jj < ii; ++jj)
1762	bp[jj + kk] = pat[jj];
1763	if (!(options & F_QUIET)) {
1764	(void)printf("PATTERN: 0x");
1765	for (jj = 0; jj < ii; ++jj)
1766	(void)printf("%02x", bp[jj] & 0xFF);
1767	(void)printf("\n");
1768	}
1769	}
1770
1771	#if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
1772	#define SECOPT " [-P policy]"
1773	#else
1774	#define SECOPT ""
1775	#endif
1776	static void
1777	usage()
1778	{
1779
1780	(void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1781	"usage: ping [-AaDdfnoQqRrv] [-c count] [-G sweepmaxsize] [-g sweepminsize]",
1782	" [-h sweepincrsize] [-i wait] [-l preload] [-M mask \| time] [-m ttl]",
1783	" " SECOPT " [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]",
1784	" [-W waittime] [-z tos] host",
1785	" ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]",
1786	" [-M mask \| time] [-m ttl]" SECOPT " [-p pattern] [-S src_addr]",
1787	" [-s packetsize] [-T ttl] [-t timeout] [-W waittime]",
1788	" [-z tos] mcast-group");
1789	exit(EX_USAGE);
1790	}

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