forked from opnsense/src
-
Notifications
You must be signed in to change notification settings - Fork 0
/
ping.c
1719 lines (1606 loc) · 43.5 KB
/
ping.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Mike Muuss.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if 0
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* P I N G . C
*
* Using the Internet Control Message Protocol (ICMP) "ECHO" facility,
* measure round-trip-delays and packet loss across network paths.
*
* Author -
* Mike Muuss
* U. S. Army Ballistic Research Laboratory
* December, 1983
*
* Status -
* Public Domain. Distribution Unlimited.
* Bugs -
* More statistics could always be gathered.
* This program has to run SUID to ROOT to access the ICMP socket.
*/
#include <sys/param.h> /* NB: we rely on this for <sys/types.h> */
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <netinet/ip_var.h>
#include <arpa/inet.h>
#ifdef IPSEC
#include <netipsec/ipsec.h>
#endif /*IPSEC*/
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <math.h>
#include <netdb.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#define INADDR_LEN ((int)sizeof(in_addr_t))
#define TIMEVAL_LEN ((int)sizeof(struct tv32))
#define MASK_LEN (ICMP_MASKLEN - ICMP_MINLEN)
#define TS_LEN (ICMP_TSLEN - ICMP_MINLEN)
#define DEFDATALEN 56 /* default data length */
#define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */
/* runs out of buffer space */
#define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN)
#define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN)
#define MAXWAIT 10000 /* max ms to wait for response */
#define MAXALARM (60 * 60) /* max seconds for alarm timeout */
#define MAXTOS 255
#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */
#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */
#define SET(bit) (A(bit) |= B(bit))
#define CLR(bit) (A(bit) &= (~B(bit)))
#define TST(bit) (A(bit) & B(bit))
struct tv32 {
int32_t tv32_sec;
int32_t tv32_usec;
};
/* various options */
int options;
#define F_FLOOD 0x0001
#define F_INTERVAL 0x0002
#define F_NUMERIC 0x0004
#define F_PINGFILLED 0x0008
#define F_QUIET 0x0010
#define F_RROUTE 0x0020
#define F_SO_DEBUG 0x0040
#define F_SO_DONTROUTE 0x0080
#define F_VERBOSE 0x0100
#define F_QUIET2 0x0200
#define F_NOLOOP 0x0400
#define F_MTTL 0x0800
#define F_MIF 0x1000
#define F_AUDIBLE 0x2000
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
#define F_POLICY 0x4000
#endif /*IPSEC_POLICY_IPSEC*/
#endif /*IPSEC*/
#define F_TTL 0x8000
#define F_MISSED 0x10000
#define F_ONCE 0x20000
#define F_HDRINCL 0x40000
#define F_MASK 0x80000
#define F_TIME 0x100000
#define F_SWEEP 0x200000
#define F_WAITTIME 0x400000
/*
* MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
* number of received sequence numbers we can keep track of. Change 128
* to 8192 for complete accuracy...
*/
#define MAX_DUP_CHK (8 * 128)
int mx_dup_ck = MAX_DUP_CHK;
char rcvd_tbl[MAX_DUP_CHK / 8];
struct sockaddr_in whereto; /* who to ping */
int datalen = DEFDATALEN;
int maxpayload;
int s; /* socket file descriptor */
u_char outpackhdr[IP_MAXPACKET], *outpack;
char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */
char BSPACE = '\b'; /* characters written for flood */
char DOT = '.';
char *hostname;
char *shostname;
int ident; /* process id to identify our packets */
int uid; /* cached uid for micro-optimization */
u_char icmp_type = ICMP_ECHO;
u_char icmp_type_rsp = ICMP_ECHOREPLY;
int phdr_len = 0;
int send_len;
/* counters */
long nmissedmax; /* max value of ntransmitted - nreceived - 1 */
long npackets; /* max packets to transmit */
long nreceived; /* # of packets we got back */
long nrepeats; /* number of duplicates */
long ntransmitted; /* sequence # for outbound packets = #sent */
long snpackets; /* max packets to transmit in one sweep */
long snreceived; /* # of packets we got back in this sweep */
long sntransmitted; /* # of packets we sent in this sweep */
int sweepmax; /* max value of payload in sweep */
int sweepmin = 0; /* start value of payload in sweep */
int sweepincr = 1; /* payload increment in sweep */
int interval = 1000; /* interval between packets, ms */
int waittime = MAXWAIT; /* timeout for each packet */
long nrcvtimeout = 0; /* # of packets we got back after waittime */
/* timing */
int timing; /* flag to do timing */
double tmin = 999999999.0; /* minimum round trip time */
double tmax = 0.0; /* maximum round trip time */
double tsum = 0.0; /* sum of all times, for doing average */
double tsumsq = 0.0; /* sum of all times squared, for std. dev. */
volatile sig_atomic_t finish_up; /* nonzero if we've been told to finish up */
volatile sig_atomic_t siginfo_p;
static void fill(char *, char *);
static u_short in_cksum(u_short *, int);
static void check_status(void);
static void finish(void) __dead2;
static void pinger(void);
static char *pr_addr(struct in_addr);
static char *pr_ntime(n_time);
static void pr_icmph(struct icmp *);
static void pr_iph(struct ip *);
static void pr_pack(char *, int, struct sockaddr_in *, struct timeval *);
static void pr_retip(struct ip *);
static void status(int);
static void stopit(int);
static void tvsub(struct timeval *, struct timeval *);
static void usage(void) __dead2;
int
main(argc, argv)
int argc;
char *const *argv;
{
struct sockaddr_in from, sock_in;
struct in_addr ifaddr;
struct timeval last, intvl;
struct iovec iov;
struct ip *ip;
struct msghdr msg;
struct sigaction si_sa;
size_t sz;
u_char *datap, packet[IP_MAXPACKET] __aligned(4);
char *ep, *source, *target, *payload;
struct hostent *hp;
#ifdef IPSEC_POLICY_IPSEC
char *policy_in, *policy_out;
#endif
struct sockaddr_in *to;
double t;
u_long alarmtimeout, ultmp;
int almost_done, ch, df, hold, i, icmp_len, mib[4], preload, sockerrno,
tos, ttl;
char ctrl[CMSG_SPACE(sizeof(struct timeval))];
char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN];
#ifdef IP_OPTIONS
char rspace[MAX_IPOPTLEN]; /* record route space */
#endif
unsigned char loop, mttl;
payload = source = NULL;
#ifdef IPSEC_POLICY_IPSEC
policy_in = policy_out = NULL;
#endif
/*
* Do the stuff that we need root priv's for *first*, and
* then drop our setuid bit. Save error reporting for
* after arg parsing.
*/
s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
sockerrno = errno;
setuid(getuid());
uid = getuid();
alarmtimeout = df = preload = tos = 0;
outpack = outpackhdr + sizeof(struct ip);
while ((ch = getopt(argc, argv,
"Aac:DdfG:g:h:I:i:Ll:M:m:nop:QqRrS:s:T:t:vW:z:"
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
"P:"
#endif /*IPSEC_POLICY_IPSEC*/
#endif /*IPSEC*/
)) != -1)
{
switch(ch) {
case 'A':
options |= F_MISSED;
break;
case 'a':
options |= F_AUDIBLE;
break;
case 'c':
ultmp = strtoul(optarg, &ep, 0);
if (*ep || ep == optarg || ultmp > LONG_MAX || !ultmp)
errx(EX_USAGE,
"invalid count of packets to transmit: `%s'",
optarg);
npackets = ultmp;
break;
case 'D':
options |= F_HDRINCL;
df = 1;
break;
case 'd':
options |= F_SO_DEBUG;
break;
case 'f':
if (uid) {
errno = EPERM;
err(EX_NOPERM, "-f flag");
}
options |= F_FLOOD;
setbuf(stdout, (char *)NULL);
break;
case 'G': /* Maximum packet size for ping sweep */
ultmp = strtoul(optarg, &ep, 0);
if (*ep || ep == optarg)
errx(EX_USAGE, "invalid packet size: `%s'",
optarg);
if (uid != 0 && ultmp > DEFDATALEN) {
errno = EPERM;
err(EX_NOPERM,
"packet size too large: %lu > %u",
ultmp, DEFDATALEN);
}
options |= F_SWEEP;
sweepmax = ultmp;
break;
case 'g': /* Minimum packet size for ping sweep */
ultmp = strtoul(optarg, &ep, 0);
if (*ep || ep == optarg)
errx(EX_USAGE, "invalid packet size: `%s'",
optarg);
if (uid != 0 && ultmp > DEFDATALEN) {
errno = EPERM;
err(EX_NOPERM,
"packet size too large: %lu > %u",
ultmp, DEFDATALEN);
}
options |= F_SWEEP;
sweepmin = ultmp;
break;
case 'h': /* Packet size increment for ping sweep */
ultmp = strtoul(optarg, &ep, 0);
if (*ep || ep == optarg || ultmp < 1)
errx(EX_USAGE, "invalid increment size: `%s'",
optarg);
if (uid != 0 && ultmp > DEFDATALEN) {
errno = EPERM;
err(EX_NOPERM,
"packet size too large: %lu > %u",
ultmp, DEFDATALEN);
}
options |= F_SWEEP;
sweepincr = ultmp;
break;
case 'I': /* multicast interface */
if (inet_aton(optarg, &ifaddr) == 0)
errx(EX_USAGE,
"invalid multicast interface: `%s'",
optarg);
options |= F_MIF;
break;
case 'i': /* wait between sending packets */
t = strtod(optarg, &ep) * 1000.0;
if (*ep || ep == optarg || t > (double)INT_MAX)
errx(EX_USAGE, "invalid timing interval: `%s'",
optarg);
options |= F_INTERVAL;
interval = (int)t;
if (uid && interval < 1000) {
errno = EPERM;
err(EX_NOPERM, "-i interval too short");
}
break;
case 'L':
options |= F_NOLOOP;
loop = 0;
break;
case 'l':
ultmp = strtoul(optarg, &ep, 0);
if (*ep || ep == optarg || ultmp > INT_MAX)
errx(EX_USAGE,
"invalid preload value: `%s'", optarg);
if (uid) {
errno = EPERM;
err(EX_NOPERM, "-l flag");
}
preload = ultmp;
break;
case 'M':
switch(optarg[0]) {
case 'M':
case 'm':
options |= F_MASK;
break;
case 'T':
case 't':
options |= F_TIME;
break;
default:
errx(EX_USAGE, "invalid message: `%c'", optarg[0]);
break;
}
break;
case 'm': /* TTL */
ultmp = strtoul(optarg, &ep, 0);
if (*ep || ep == optarg || ultmp > MAXTTL)
errx(EX_USAGE, "invalid TTL: `%s'", optarg);
ttl = ultmp;
options |= F_TTL;
break;
case 'n':
options |= F_NUMERIC;
break;
case 'o':
options |= F_ONCE;
break;
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
case 'P':
options |= F_POLICY;
if (!strncmp("in", optarg, 2))
policy_in = strdup(optarg);
else if (!strncmp("out", optarg, 3))
policy_out = strdup(optarg);
else
errx(1, "invalid security policy");
break;
#endif /*IPSEC_POLICY_IPSEC*/
#endif /*IPSEC*/
case 'p': /* fill buffer with user pattern */
options |= F_PINGFILLED;
payload = optarg;
break;
case 'Q':
options |= F_QUIET2;
break;
case 'q':
options |= F_QUIET;
break;
case 'R':
options |= F_RROUTE;
break;
case 'r':
options |= F_SO_DONTROUTE;
break;
case 'S':
source = optarg;
break;
case 's': /* size of packet to send */
ultmp = strtoul(optarg, &ep, 0);
if (*ep || ep == optarg)
errx(EX_USAGE, "invalid packet size: `%s'",
optarg);
if (uid != 0 && ultmp > DEFDATALEN) {
errno = EPERM;
err(EX_NOPERM,
"packet size too large: %lu > %u",
ultmp, DEFDATALEN);
}
datalen = ultmp;
break;
case 'T': /* multicast TTL */
ultmp = strtoul(optarg, &ep, 0);
if (*ep || ep == optarg || ultmp > MAXTTL)
errx(EX_USAGE, "invalid multicast TTL: `%s'",
optarg);
mttl = ultmp;
options |= F_MTTL;
break;
case 't':
alarmtimeout = strtoul(optarg, &ep, 0);
if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
errx(EX_USAGE, "invalid timeout: `%s'",
optarg);
if (alarmtimeout > MAXALARM)
errx(EX_USAGE, "invalid timeout: `%s' > %d",
optarg, MAXALARM);
alarm((int)alarmtimeout);
break;
case 'v':
options |= F_VERBOSE;
break;
case 'W': /* wait ms for answer */
t = strtod(optarg, &ep);
if (*ep || ep == optarg || t > (double)INT_MAX)
errx(EX_USAGE, "invalid timing interval: `%s'",
optarg);
options |= F_WAITTIME;
waittime = (int)t;
break;
case 'z':
options |= F_HDRINCL;
ultmp = strtoul(optarg, &ep, 0);
if (*ep || ep == optarg || ultmp > MAXTOS)
errx(EX_USAGE, "invalid TOS: `%s'", optarg);
tos = ultmp;
break;
default:
usage();
}
}
if (argc - optind != 1)
usage();
target = argv[optind];
switch (options & (F_MASK|F_TIME)) {
case 0: break;
case F_MASK:
icmp_type = ICMP_MASKREQ;
icmp_type_rsp = ICMP_MASKREPLY;
phdr_len = MASK_LEN;
if (!(options & F_QUIET))
(void)printf("ICMP_MASKREQ\n");
break;
case F_TIME:
icmp_type = ICMP_TSTAMP;
icmp_type_rsp = ICMP_TSTAMPREPLY;
phdr_len = TS_LEN;
if (!(options & F_QUIET))
(void)printf("ICMP_TSTAMP\n");
break;
default:
errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive.");
break;
}
icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len;
if (options & F_RROUTE)
icmp_len += MAX_IPOPTLEN;
maxpayload = IP_MAXPACKET - icmp_len;
if (datalen > maxpayload)
errx(EX_USAGE, "packet size too large: %d > %d", datalen,
maxpayload);
send_len = icmp_len + datalen;
datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN];
if (options & F_PINGFILLED) {
fill((char *)datap, payload);
}
if (source) {
bzero((char *)&sock_in, sizeof(sock_in));
sock_in.sin_family = AF_INET;
if (inet_aton(source, &sock_in.sin_addr) != 0) {
shostname = source;
} else {
hp = gethostbyname2(source, AF_INET);
if (!hp)
errx(EX_NOHOST, "cannot resolve %s: %s",
source, hstrerror(h_errno));
sock_in.sin_len = sizeof sock_in;
if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) ||
hp->h_length < 0)
errx(1, "gethostbyname2: illegal address");
memcpy(&sock_in.sin_addr, hp->h_addr_list[0],
sizeof(sock_in.sin_addr));
(void)strncpy(snamebuf, hp->h_name,
sizeof(snamebuf) - 1);
snamebuf[sizeof(snamebuf) - 1] = '\0';
shostname = snamebuf;
}
if (bind(s, (struct sockaddr *)&sock_in, sizeof sock_in) == -1)
err(1, "bind");
}
bzero(&whereto, sizeof(whereto));
to = &whereto;
to->sin_family = AF_INET;
to->sin_len = sizeof *to;
if (inet_aton(target, &to->sin_addr) != 0) {
hostname = target;
} else {
hp = gethostbyname2(target, AF_INET);
if (!hp)
errx(EX_NOHOST, "cannot resolve %s: %s",
target, hstrerror(h_errno));
if ((unsigned)hp->h_length > sizeof(to->sin_addr))
errx(1, "gethostbyname2 returned an illegal address");
memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr);
(void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1);
hnamebuf[sizeof(hnamebuf) - 1] = '\0';
hostname = hnamebuf;
}
if (options & F_FLOOD && options & F_INTERVAL)
errx(EX_USAGE, "-f and -i: incompatible options");
if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
errx(EX_USAGE,
"-f flag cannot be used with multicast destination");
if (options & (F_MIF | F_NOLOOP | F_MTTL)
&& !IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
errx(EX_USAGE,
"-I, -L, -T flags cannot be used with unicast destination");
if (datalen >= TIMEVAL_LEN) /* can we time transfer */
timing = 1;
if (!(options & F_PINGFILLED))
for (i = TIMEVAL_LEN; i < datalen; ++i)
*datap++ = i;
ident = getpid() & 0xFFFF;
if (s < 0) {
errno = sockerrno;
err(EX_OSERR, "socket");
}
hold = 1;
if (options & F_SO_DEBUG)
(void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold,
sizeof(hold));
if (options & F_SO_DONTROUTE)
(void)setsockopt(s, SOL_SOCKET, SO_DONTROUTE, (char *)&hold,
sizeof(hold));
#ifdef IPSEC
#ifdef IPSEC_POLICY_IPSEC
if (options & F_POLICY) {
char *buf;
if (policy_in != NULL) {
buf = ipsec_set_policy(policy_in, strlen(policy_in));
if (buf == NULL)
errx(EX_CONFIG, "%s", ipsec_strerror());
if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY,
buf, ipsec_get_policylen(buf)) < 0)
err(EX_CONFIG,
"ipsec policy cannot be configured");
free(buf);
}
if (policy_out != NULL) {
buf = ipsec_set_policy(policy_out, strlen(policy_out));
if (buf == NULL)
errx(EX_CONFIG, "%s", ipsec_strerror());
if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY,
buf, ipsec_get_policylen(buf)) < 0)
err(EX_CONFIG,
"ipsec policy cannot be configured");
free(buf);
}
}
#endif /*IPSEC_POLICY_IPSEC*/
#endif /*IPSEC*/
if (options & F_HDRINCL) {
ip = (struct ip*)outpackhdr;
if (!(options & (F_TTL | F_MTTL))) {
mib[0] = CTL_NET;
mib[1] = PF_INET;
mib[2] = IPPROTO_IP;
mib[3] = IPCTL_DEFTTL;
sz = sizeof(ttl);
if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1)
err(1, "sysctl(net.inet.ip.ttl)");
}
setsockopt(s, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold));
ip->ip_v = IPVERSION;
ip->ip_hl = sizeof(struct ip) >> 2;
ip->ip_tos = tos;
ip->ip_id = 0;
ip->ip_off = df ? IP_DF : 0;
ip->ip_ttl = ttl;
ip->ip_p = IPPROTO_ICMP;
ip->ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY;
ip->ip_dst = to->sin_addr;
}
/* record route option */
if (options & F_RROUTE) {
#ifdef IP_OPTIONS
bzero(rspace, sizeof(rspace));
rspace[IPOPT_OPTVAL] = IPOPT_RR;
rspace[IPOPT_OLEN] = sizeof(rspace) - 1;
rspace[IPOPT_OFFSET] = IPOPT_MINOFF;
rspace[sizeof(rspace) - 1] = IPOPT_EOL;
if (setsockopt(s, IPPROTO_IP, IP_OPTIONS, rspace,
sizeof(rspace)) < 0)
err(EX_OSERR, "setsockopt IP_OPTIONS");
#else
errx(EX_UNAVAILABLE,
"record route not available in this implementation");
#endif /* IP_OPTIONS */
}
if (options & F_TTL) {
if (setsockopt(s, IPPROTO_IP, IP_TTL, &ttl,
sizeof(ttl)) < 0) {
err(EX_OSERR, "setsockopt IP_TTL");
}
}
if (options & F_NOLOOP) {
if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &loop,
sizeof(loop)) < 0) {
err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP");
}
}
if (options & F_MTTL) {
if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &mttl,
sizeof(mttl)) < 0) {
err(EX_OSERR, "setsockopt IP_MULTICAST_TTL");
}
}
if (options & F_MIF) {
if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr,
sizeof(ifaddr)) < 0) {
err(EX_OSERR, "setsockopt IP_MULTICAST_IF");
}
}
#ifdef SO_TIMESTAMP
{ int on = 1;
if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)) < 0)
err(EX_OSERR, "setsockopt SO_TIMESTAMP");
}
#endif
if (sweepmax) {
if (sweepmin >= sweepmax)
errx(EX_USAGE, "Maximum packet size must be greater than the minimum packet size");
if (datalen != DEFDATALEN)
errx(EX_USAGE, "Packet size and ping sweep are mutually exclusive");
if (npackets > 0) {
snpackets = npackets;
npackets = 0;
} else
snpackets = 1;
datalen = sweepmin;
send_len = icmp_len + sweepmin;
}
if (options & F_SWEEP && !sweepmax)
errx(EX_USAGE, "Maximum sweep size must be specified");
/*
* When pinging the broadcast address, you can get a lot of answers.
* Doing something so evil is useful if you are trying to stress the
* ethernet, or just want to fill the arp cache to get some stuff for
* /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast
* or multicast pings if they wish.
*/
/*
* XXX receive buffer needs undetermined space for mbuf overhead
* as well.
*/
hold = IP_MAXPACKET + 128;
(void)setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
sizeof(hold));
if (uid == 0)
(void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char *)&hold,
sizeof(hold));
if (to->sin_family == AF_INET) {
(void)printf("PING %s (%s)", hostname,
inet_ntoa(to->sin_addr));
if (source)
(void)printf(" from %s", shostname);
if (sweepmax)
(void)printf(": (%d ... %d) data bytes\n",
sweepmin, sweepmax);
else
(void)printf(": %d data bytes\n", datalen);
} else {
if (sweepmax)
(void)printf("PING %s: (%d ... %d) data bytes\n",
hostname, sweepmin, sweepmax);
else
(void)printf("PING %s: %d data bytes\n", hostname, datalen);
}
/*
* Use sigaction() instead of signal() to get unambiguous semantics,
* in particular with SA_RESTART not set.
*/
sigemptyset(&si_sa.sa_mask);
si_sa.sa_flags = 0;
si_sa.sa_handler = stopit;
if (sigaction(SIGINT, &si_sa, 0) == -1) {
err(EX_OSERR, "sigaction SIGINT");
}
si_sa.sa_handler = status;
if (sigaction(SIGINFO, &si_sa, 0) == -1) {
err(EX_OSERR, "sigaction");
}
if (alarmtimeout > 0) {
si_sa.sa_handler = stopit;
if (sigaction(SIGALRM, &si_sa, 0) == -1)
err(EX_OSERR, "sigaction SIGALRM");
}
bzero(&msg, sizeof(msg));
msg.msg_name = (caddr_t)&from;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
#ifdef SO_TIMESTAMP
msg.msg_control = (caddr_t)ctrl;
#endif
iov.iov_base = packet;
iov.iov_len = IP_MAXPACKET;
if (preload == 0)
pinger(); /* send the first ping */
else {
if (npackets != 0 && preload > npackets)
preload = npackets;
while (preload--) /* fire off them quickies */
pinger();
}
(void)gettimeofday(&last, NULL);
if (options & F_FLOOD) {
intvl.tv_sec = 0;
intvl.tv_usec = 10000;
} else {
intvl.tv_sec = interval / 1000;
intvl.tv_usec = interval % 1000 * 1000;
}
almost_done = 0;
while (!finish_up) {
struct timeval now, timeout;
fd_set rfds;
int cc, n;
check_status();
if ((unsigned)s >= FD_SETSIZE)
errx(EX_OSERR, "descriptor too large");
FD_ZERO(&rfds);
FD_SET(s, &rfds);
(void)gettimeofday(&now, NULL);
timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
while (timeout.tv_usec < 0) {
timeout.tv_usec += 1000000;
timeout.tv_sec--;
}
while (timeout.tv_usec >= 1000000) {
timeout.tv_usec -= 1000000;
timeout.tv_sec++;
}
if (timeout.tv_sec < 0)
timeout.tv_sec = timeout.tv_usec = 0;
n = select(s + 1, &rfds, NULL, NULL, &timeout);
if (n < 0)
continue; /* Must be EINTR. */
if (n == 1) {
struct timeval *tv = NULL;
#ifdef SO_TIMESTAMP
struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl;
msg.msg_controllen = sizeof(ctrl);
#endif
msg.msg_namelen = sizeof(from);
if ((cc = recvmsg(s, &msg, 0)) < 0) {
if (errno == EINTR)
continue;
warn("recvmsg");
continue;
}
#ifdef SO_TIMESTAMP
if (cmsg->cmsg_level == SOL_SOCKET &&
cmsg->cmsg_type == SCM_TIMESTAMP &&
cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) {
/* Copy to avoid alignment problems: */
memcpy(&now, CMSG_DATA(cmsg), sizeof(now));
tv = &now;
}
#endif
if (tv == NULL) {
(void)gettimeofday(&now, NULL);
tv = &now;
}
pr_pack((char *)packet, cc, &from, tv);
if ((options & F_ONCE && nreceived) ||
(npackets && nreceived >= npackets))
break;
}
if (n == 0 || options & F_FLOOD) {
if (sweepmax && sntransmitted == snpackets) {
for (i = 0; i < sweepincr ; ++i)
*datap++ = i;
datalen += sweepincr;
if (datalen > sweepmax)
break;
send_len = icmp_len + datalen;
sntransmitted = 0;
}
if (!npackets || ntransmitted < npackets)
pinger();
else {
if (almost_done)
break;
almost_done = 1;
intvl.tv_usec = 0;
if (nreceived) {
intvl.tv_sec = 2 * tmax / 1000;
if (!intvl.tv_sec)
intvl.tv_sec = 1;
} else {
intvl.tv_sec = waittime / 1000;
intvl.tv_usec = waittime % 1000 * 1000;
}
}
(void)gettimeofday(&last, NULL);
if (ntransmitted - nreceived - 1 > nmissedmax) {
nmissedmax = ntransmitted - nreceived - 1;
if (options & F_MISSED)
(void)write(STDOUT_FILENO, &BBELL, 1);
}
}
}
finish();
/* NOTREACHED */
exit(0); /* Make the compiler happy */
}
/*
* stopit --
* Set the global bit that causes the main loop to quit.
* Do NOT call finish() from here, since finish() does far too much
* to be called from a signal handler.
*/
void
stopit(sig)
int sig __unused;
{
/*
* When doing reverse DNS lookups, the finish_up flag might not
* be noticed for a while. Just exit if we get a second SIGINT.
*/
if (!(options & F_NUMERIC) && finish_up)
_exit(nreceived ? 0 : 2);
finish_up = 1;
}
/*
* pinger --
* Compose and transmit an ICMP ECHO REQUEST packet. The IP packet
* will be added on by the kernel. The ID field is our UNIX process ID,
* and the sequence number is an ascending integer. The first TIMEVAL_LEN
* bytes of the data portion are used to hold a UNIX "timeval" struct in
* host byte-order, to compute the round-trip time.
*/
static void
pinger(void)
{
struct timeval now;
struct tv32 tv32;
struct ip *ip;
struct icmp *icp;
int cc, i;
u_char *packet;
packet = outpack;
icp = (struct icmp *)outpack;
icp->icmp_type = icmp_type;
icp->icmp_code = 0;
icp->icmp_cksum = 0;
icp->icmp_seq = htons(ntransmitted);
icp->icmp_id = ident; /* ID */
CLR(ntransmitted % mx_dup_ck);
if ((options & F_TIME) || timing) {
(void)gettimeofday(&now, NULL);
tv32.tv32_sec = htonl(now.tv_sec);
tv32.tv32_usec = htonl(now.tv_usec);
if (options & F_TIME)
icp->icmp_otime = htonl((now.tv_sec % (24*60*60))
* 1000 + now.tv_usec / 1000);
if (timing)
bcopy((void *)&tv32,
(void *)&outpack[ICMP_MINLEN + phdr_len],
sizeof(tv32));
}
cc = ICMP_MINLEN + phdr_len + datalen;
/* compute ICMP checksum here */
icp->icmp_cksum = in_cksum((u_short *)icp, cc);
if (options & F_HDRINCL) {
cc += sizeof(struct ip);
ip = (struct ip *)outpackhdr;
ip->ip_len = cc;
ip->ip_sum = in_cksum((u_short *)outpackhdr, cc);
packet = outpackhdr;
}
i = sendto(s, (char *)packet, cc, 0, (struct sockaddr *)&whereto,
sizeof(whereto));
if (i < 0 || i != cc) {
if (i < 0) {
if (options & F_FLOOD && errno == ENOBUFS) {
usleep(FLOOD_BACKOFF);
return;
}
warn("sendto");
} else {
warn("%s: partial write: %d of %d bytes",
hostname, i, cc);
}
}