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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
|
/* $OpenBSD: ping.c,v 1.71 2005/05/27 04:55:27 mcbride Exp $ */
/* $NetBSD: ping.c,v 1.20 1995/08/11 22:37:58 cgd Exp $ */
/*
* 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.
* 3. 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.
*/
#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
#if 0
static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93";
#else
static const char rcsid[] = "$OpenBSD: ping.c,v 1.71 2005/05/27 04:55:27 mcbride Exp $";
#endif
#endif /* not lint */
/*
* 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>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/time.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <netinet/ip_var.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <signal.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
struct tvi {
u_int tv_sec;
u_int tv_usec;
};
#define DEFDATALEN (64 - 8) /* default data length */
#define MAXIPLEN 60
#define MAXICMPLEN 76
#define MAXPAYLOAD (IP_MAXPACKET - MAXIPLEN - 8) /* max ICMP payload size */
#define MAXWAIT_DEFAULT 10 /* secs to wait for response */
#define NROUTES 9 /* number of record route slots */
#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))
/* 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_SADDR 0x0200
#define F_HDRINCL 0x0400
#define F_TTL 0x0800
#define F_SO_JUMBO 0x1000
/* multicast options */
int moptions;
#define MULTICAST_NOLOOP 0x001
#define MULTICAST_TTL 0x002
#define MULTICAST_IF 0x004
/*
* 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 whereto; /* who to ping */
struct sockaddr_in whence; /* Which interface we come from */
unsigned int datalen = DEFDATALEN;
int s; /* socket file descriptor */
u_char outpackhdr[IP_MAXPACKET]; /* Max packet size = 65535 */
u_char *outpack = outpackhdr+sizeof(struct ip);
char BSPACE = '\b'; /* characters written for flood */
char DOT = '.';
char *hostname;
int ident; /* process id to identify our packets */
/* counters */
unsigned long npackets; /* max packets to transmit */
unsigned long nreceived; /* # of packets we got back */
unsigned long nrepeats; /* number of duplicates */
unsigned long ntransmitted; /* sequence # for outbound packets = #sent */
double interval = 1; /* interval between packets */
struct itimerval interstr; /* interval structure for use with setitimer */
/* timing */
int timing; /* flag to do timing */
unsigned int maxwait = MAXWAIT_DEFAULT; /* max seconds to wait for response */
quad_t tmin = 999999999; /* minimum round trip time in millisec */
quad_t tmax = 0; /* maximum round trip time in millisec */
quad_t tsum = 0; /* sum of all times in millisec, for doing average */
quad_t tsumsq = 0; /* sum of all times squared, for std. dev. */
int bufspace = IP_MAXPACKET;
void fill(char *, char *);
void catcher(int signo);
void prtsig(int signo);
void finish(int signo);
void summary(int, int);
int in_cksum(u_short *, int);
void pinger(void);
char *pr_addr(in_addr_t);
int check_icmph(struct ip *);
void pr_icmph(struct icmp *);
void pr_pack(char *, int, struct sockaddr_in *);
void pr_retip(struct ip *);
quad_t qsqrt(quad_t);
void pr_iph(struct ip *);
void usage(void);
int
main(int argc, char *argv[])
{
struct timeval timeout;
struct hostent *hp;
struct sockaddr_in *to;
struct in_addr saddr;
int i;
int ch, hold = 1, packlen, preload;
int maxsize, fdmasks;
socklen_t maxsizelen;
u_char *datap, *packet;
char *target, hnamebuf[MAXHOSTNAMELEN];
u_char ttl = MAXTTL, loop = 1;
int df = 0, tos = 0;
#ifdef IP_OPTIONS
char rspace[3 + 4 * NROUTES + 1]; /* record route space */
#endif
fd_set *fdmaskp;
const char *errstr;
if ((s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0)
err(1, "socket");
/* revoke privs */
seteuid(getuid());
setuid(getuid());
preload = 0;
datap = &outpack[8 + sizeof(struct tvi)];
while ((ch = getopt(argc, argv,
"DI:LRS:c:dfi:jl:np:qrs:T:t:vw:")) != -1)
switch(ch) {
case 'c':
npackets = strtonum(optarg, 1, INT_MAX, &errstr);
if (errstr)
errx(1,
"number of packets to transmit is %s: %s",
errstr, optarg);
break;
case 'D':
options |= F_HDRINCL;
df = 1;
break;
case 'd':
options |= F_SO_DEBUG;
break;
case 'f':
if (getuid())
errx(1, "%s", strerror(EPERM));
options |= F_FLOOD;
setbuf(stdout, (char *)NULL);
break;
case 'I':
case 'S': /* deprecated */
if (inet_aton(optarg, &saddr) == 0) {
if ((hp = gethostbyname(optarg)) == NULL)
errx(1, "bad interface address: %s",
optarg);
memcpy(&saddr, hp->h_addr, sizeof(saddr));
}
options |= F_SADDR;
break;
case 'i': /* wait between sending packets */
interval = strtod(optarg, NULL);
if (interval <= 0 || interval >= INT_MAX)
errx(1, "bad timing interval: %s", optarg);
if (interval < 1)
if (getuid())
errx(1, "%s: only root may use interval < 1s",
strerror(EPERM));
if (interval < 0.01)
interval = 0.01;
options |= F_INTERVAL;
break;
case 'j':
options |= F_SO_JUMBO;
break;
case 'L':
moptions |= MULTICAST_NOLOOP;
loop = 0;
break;
case 'l':
if (getuid())
errx(1, "%s", strerror(EPERM));
preload = strtonum(optarg, 1, INT_MAX, &errstr);
if (errstr)
errx(1, "preload value is %s: %s",
errstr, optarg);
break;
case 'n':
options |= F_NUMERIC;
break;
case 'p': /* fill buffer with user pattern */
options |= F_PINGFILLED;
fill((char *)datap, optarg);
break;
case 'q':
options |= F_QUIET;
break;
case 'R':
options |= F_RROUTE;
break;
case 'r':
options |= F_SO_DONTROUTE;
break;
case 's': /* size of packet to send */
datalen = strtonum(optarg, 0, MAXPAYLOAD, &errstr);
if (errstr)
errx(1, "packet size is %s: %s",
errstr, optarg);
break;
case 'T':
options |= F_HDRINCL;
tos = strtonum(optarg, 0, 0xff, &errstr);
if (errstr)
errx(1, "tos value is %s: %s", errstr, optarg);
break;
case 't':
options |= F_TTL;
ttl = strtonum(optarg, 1, 255, &errstr);
if (errstr)
errx(1, "ttl value is %s: %s", errstr, optarg);
break;
case 'v':
options |= F_VERBOSE;
break;
case 'w':
maxwait = strtonum(optarg, 1, INT_MAX, &errstr);
if (errstr)
errx(1, "maxwait value is %s: %s",
errstr, optarg);
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (argc != 1)
usage();
memset(&interstr, 0, sizeof(interstr));
interstr.it_value.tv_sec = (long) interval;
interstr.it_value.tv_usec =
(long) ((interval - interstr.it_value.tv_sec) * 1000000);
target = *argv;
memset(&whereto, 0, sizeof(struct sockaddr));
to = (struct sockaddr_in *)&whereto;
to->sin_len = sizeof(struct sockaddr_in);
to->sin_family = AF_INET;
if (inet_aton(target, &to->sin_addr) != 0)
hostname = target;
else {
hp = gethostbyname(target);
if (!hp)
errx(1, "unknown host: %s", target);
to->sin_family = hp->h_addrtype;
memcpy(&to->sin_addr, hp->h_addr, hp->h_length);
(void)strlcpy(hnamebuf, hp->h_name, sizeof(hnamebuf));
hostname = hnamebuf;
}
if (options & F_FLOOD && options & F_INTERVAL)
errx(1, "-f and -i options are incompatible");
if (datalen >= sizeof(struct tvi)) /* can we time transfer */
timing = 1;
packlen = datalen + MAXIPLEN + MAXICMPLEN;
if (!(packet = (u_char *)malloc((u_int)packlen)))
err(1, "malloc");
if (!(options & F_PINGFILLED))
for (i = sizeof(struct tvi); i < datalen; ++i)
*datap++ = i;
ident = getpid() & 0xFFFF;
if (options & F_SADDR) {
if (IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
moptions |= MULTICAST_IF;
else {
memset(&whence, 0, sizeof(whence));
whence.sin_len = sizeof(whence);
whence.sin_family = AF_INET;
memcpy(&whence.sin_addr.s_addr, &saddr, sizeof(saddr));
if (bind(s, (struct sockaddr*)&whence,
sizeof(whence)) < 0)
err(1, "bind");
}
}
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));
if (options & F_SO_JUMBO)
(void)setsockopt(s, SOL_SOCKET, SO_JUMBO, (char *)&hold,
sizeof(hold));
if (options & F_TTL) {
if (IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
moptions |= MULTICAST_TTL;
else
options |= F_HDRINCL;
}
if (options & F_RROUTE && options & F_HDRINCL)
errx(1, "-R option and -D or -T, or -t to unicast destinations"
" are incompatible");
if (options & F_HDRINCL) {
struct ip *ip = (struct ip *)outpackhdr;
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 = htons(df ? IP_DF : 0);
ip->ip_ttl = ttl;
ip->ip_p = IPPROTO_ICMP;
if (options & F_SADDR)
ip->ip_src = saddr;
else
ip->ip_src.s_addr = INADDR_ANY;
ip->ip_dst = to->sin_addr;
}
/* record route option */
if (options & F_RROUTE) {
if (IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
errx(1, "record route not valid to multicast destinations");
#ifdef IP_OPTIONS
memset(rspace, 0, sizeof(rspace));
rspace[IPOPT_OPTVAL] = IPOPT_RR;
rspace[IPOPT_OLEN] = sizeof(rspace)-1;
rspace[IPOPT_OFFSET] = IPOPT_MINOFF;
if (setsockopt(s, IPPROTO_IP, IP_OPTIONS, rspace,
sizeof(rspace)) < 0) {
perror("ping: record route");
exit(1);
}
#else
errx(1, "record route not available in this implementation");
#endif /* IP_OPTIONS */
}
if ((moptions & MULTICAST_NOLOOP) &&
setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &loop,
sizeof(loop)) < 0)
err(1, "setsockopt IP_MULTICAST_LOOP");
if ((moptions & MULTICAST_TTL) &&
setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &ttl,
sizeof(ttl)) < 0)
err(1, "setsockopt IP_MULTICAST_TTL");
if ((moptions & MULTICAST_IF) &&
setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, &saddr,
sizeof(saddr)) < 0)
err(1, "setsockopt IP_MULTICAST_IF");
/*
* When trying to send large packets, you must increase the
* size of both the send and receive buffers...
*/
maxsizelen = sizeof maxsize;
if (getsockopt(s, SOL_SOCKET, SO_SNDBUF, &maxsize, &maxsizelen) < 0)
err(1, "getsockopt");
if (maxsize < packlen &&
setsockopt(s, SOL_SOCKET, SO_SNDBUF, &packlen, sizeof(maxsize)) < 0)
err(1, "setsockopt");
/*
* 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.
*/
while (setsockopt(s, SOL_SOCKET, SO_RCVBUF,
(void*)&bufspace, sizeof(bufspace)) < 0) {
if ((bufspace -= 1024) <= 0)
err(1, "Cannot set the receive buffer size");
}
if (bufspace < IP_MAXPACKET)
warnx("Could only allocate a receive buffer of %i bytes (default %i)",
bufspace, IP_MAXPACKET);
if (to->sin_family == AF_INET)
(void)printf("PING %s (%s): %d data bytes\n", hostname,
inet_ntoa(*(struct in_addr *)&to->sin_addr.s_addr),
datalen);
else
(void)printf("PING %s: %d data bytes\n", hostname, datalen);
(void)signal(SIGINT, finish);
(void)signal(SIGALRM, catcher);
#ifdef SIGINFO
(void)signal(SIGINFO, prtsig);
#endif
while (preload--) /* fire off them quickies */
pinger();
if ((options & F_FLOOD) == 0)
catcher(0); /* start things going */
fdmasks = howmany(s+1, NFDBITS) * sizeof(fd_mask);
if ((fdmaskp = (fd_set *)malloc(fdmasks)) == NULL)
err(1, "malloc");
for (;;) {
struct sockaddr_in from;
sigset_t omask, nmask;
socklen_t fromlen;
int cc;
if (options & F_FLOOD) {
pinger();
timeout.tv_sec = 0;
timeout.tv_usec = 10000;
memset(fdmaskp, 0, fdmasks);
FD_SET(s, fdmaskp);
if (select(s + 1, (fd_set *)fdmaskp, (fd_set *)NULL,
(fd_set *)NULL, &timeout) < 1)
continue;
}
fromlen = sizeof(from);
if ((cc = recvfrom(s, (char *)packet, packlen, 0,
(struct sockaddr *)&from, &fromlen)) < 0) {
if (errno == EINTR)
continue;
perror("ping: recvfrom");
continue;
}
sigemptyset(&nmask);
sigaddset(&nmask, SIGALRM);
sigprocmask(SIG_BLOCK, &nmask, &omask);
pr_pack((char *)packet, cc, &from);
sigprocmask(SIG_SETMASK, &omask, NULL);
if (npackets && nreceived >= npackets)
break;
}
free(fdmaskp);
finish(0);
/* NOTREACHED */
exit(0); /* Make the compiler happy */
}
/*
* catcher --
* This routine causes another PING to be transmitted, and then
* schedules another SIGALRM for 1 second from now.
*
* bug --
* Our sense of time will slowly skew (i.e., packets will not be
* launched exactly at 1-second intervals). This does not affect the
* quality of the delay and loss statistics.
*/
/* ARGSUSED */
void
catcher(int signo)
{
int save_errno = errno;
unsigned int waittime;
pinger();
(void)signal(SIGALRM, catcher);
if (!npackets || ntransmitted < npackets)
setitimer(ITIMER_REAL, &interstr, (struct itimerval *)0);
else {
if (nreceived) {
waittime = 2 * tmax / 1000000;
if (!waittime)
waittime = 1;
} else
waittime = maxwait;
(void)signal(SIGALRM, finish);
(void)alarm(waittime);
}
errno = save_errno;
}
/*
* Print statistics when SIGINFO is received.
* XXX not race safe
*/
/* ARGSUSED */
void
prtsig(int signo)
{
int save_errno = errno;
summary(0, 1);
errno = save_errno;
}
/*
* 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 8 bytes
* of the data portion are used to hold a UNIX "timeval" struct in VAX
* byte-order, to compute the round-trip time.
*/
void
pinger(void)
{
struct icmp *icp;
char buf[8192];
int cc, i;
u_char *packet = outpack;
icp = (struct icmp *)outpack;
icp->icmp_type = ICMP_ECHO;
icp->icmp_code = 0;
icp->icmp_cksum = 0;
icp->icmp_seq = htons(ntransmitted);
icp->icmp_id = ident; /* ID */
CLR(ntohs(icp->icmp_seq) % mx_dup_ck);
if (timing) {
struct timeval tv;
struct tvi tvi;
(void)gettimeofday(&tv, (struct timezone *)NULL);
tvi.tv_sec = htonl(tv.tv_sec);
tvi.tv_usec = htonl(tv.tv_usec);
memcpy((u_int *)&outpack[8], &tvi, sizeof tvi);
}
cc = datalen + 8; /* skips ICMP portion */
/* compute ICMP checksum here */
icp->icmp_cksum = in_cksum((u_short *)icp, cc);
if (options & F_HDRINCL) {
struct ip *ip = (struct ip *)outpackhdr;
packet = (u_char *)ip;
cc += sizeof(struct ip);
ip->ip_len = htons(cc);
ip->ip_sum = in_cksum((u_short *)outpackhdr, cc);
}
i = sendto(s, (char *)packet, cc, 0, &whereto,
sizeof(struct sockaddr));
if (i < 0 || i != cc) {
if (i < 0)
perror("ping: sendto");
snprintf(buf, sizeof buf, "ping: wrote %s %d chars, ret=%d\n",
hostname, cc, i);
write(STDOUT_FILENO, buf, strlen(buf));
}
if (!(options & F_QUIET) && options & F_FLOOD)
(void)write(STDOUT_FILENO, &DOT, 1);
ntransmitted++;
}
/*
* pr_pack --
* Print out the packet, if it came from us. This logic is necessary
* because ALL readers of the ICMP socket get a copy of ALL ICMP packets
* which arrive ('tis only fair). This permits multiple copies of this
* program to be run without having intermingled output (or statistics!).
*/
void
pr_pack(char *buf, int cc, struct sockaddr_in *from)
{
struct icmp *icp;
in_addr_t l;
u_int i, j;
u_char *cp, *dp;
static int old_rrlen;
static char old_rr[MAX_IPOPTLEN];
struct ip *ip, *ip2;
struct timeval tv, tp;
char *pkttime;
quad_t triptime = 0;
int hlen, hlen2, dupflag;
(void)gettimeofday(&tv, (struct timezone *)NULL);
/* Check the IP header */
ip = (struct ip *)buf;
hlen = ip->ip_hl << 2;
if (cc < hlen + ICMP_MINLEN) {
if (options & F_VERBOSE)
warnx("packet too short (%d bytes) from %s", cc,
inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr));
return;
}
/* Now the ICMP part */
cc -= hlen;
icp = (struct icmp *)(buf + hlen);
if (icp->icmp_type == ICMP_ECHOREPLY) {
if (icp->icmp_id != ident)
return; /* 'Twas not our ECHO */
++nreceived;
if (timing) {
struct tvi tvi;
#ifndef icmp_data
pkttime = (char *)&icp->icmp_ip;
#else
pkttime = (char *)icp->icmp_data;
#endif
memcpy(&tvi, pkttime, sizeof tvi);
tp.tv_sec = ntohl(tvi.tv_sec);
tp.tv_usec = ntohl(tvi.tv_usec);
timersub(&tv, &tp, &tv);
triptime = (tv.tv_sec * 1000000) + tv.tv_usec;
tsum += triptime;
tsumsq += triptime * triptime;
if (triptime < tmin)
tmin = triptime;
if (triptime > tmax)
tmax = triptime;
}
if (TST(ntohs(icp->icmp_seq) % mx_dup_ck)) {
++nrepeats;
--nreceived;
dupflag = 1;
} else {
SET(ntohs(icp->icmp_seq) % mx_dup_ck);
dupflag = 0;
}
if (options & F_QUIET)
return;
if (options & F_FLOOD)
(void)write(STDOUT_FILENO, &BSPACE, 1);
else {
(void)printf("%d bytes from %s: icmp_seq=%u", cc,
inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr),
ntohs(icp->icmp_seq));
(void)printf(" ttl=%d", ip->ip_ttl);
if (timing)
(void)printf(" time=%d.%03d ms",
(int)(triptime / 1000),
(int)(triptime % 1000));
if (dupflag)
(void)printf(" (DUP!)");
/* check the data */
cp = (u_char *)&icp->icmp_data[sizeof(struct tvi)];
dp = &outpack[8 + sizeof(struct tvi)];
for (i = 8 + sizeof(struct tvi); i < datalen;
++i, ++cp, ++dp) {
if (*cp != *dp) {
(void)printf("\nwrong data byte #%d "
"should be 0x%x but was 0x%x",
i, *dp, *cp);
cp = (u_char *)&icp->icmp_data[0];
for (i = 8; i < datalen; ++i, ++cp) {
if ((i % 32) == 8)
(void)printf("\n\t");
(void)printf("%x ", *cp);
}
break;
}
}
}
} else {
/* We've got something other than an ECHOREPLY */
if (!(options & F_VERBOSE))
return;
ip2 = (struct ip *) (buf + hlen + sizeof (struct icmp));
hlen2 = ip2->ip_hl << 2;
if (cc >= hlen2 + 8 && check_icmph((struct ip *)(icp +
sizeof (struct icmp))) != 1)
return;
(void)printf("%d bytes from %s: ", cc,
pr_addr(from->sin_addr.s_addr));
pr_icmph(icp);
}
/* Display any IP options */
cp = (u_char *)buf + sizeof(struct ip);
for (; hlen > (int)sizeof(struct ip); --hlen, ++cp)
switch (*cp) {
case IPOPT_EOL:
hlen = 0;
break;
case IPOPT_LSRR:
(void)printf("\nLSRR: ");
hlen -= 2;
j = *++cp;
++cp;
i = 0;
if (j > IPOPT_MINOFF) {
for (;;) {
l = *++cp;
l = (l<<8) + *++cp;
l = (l<<8) + *++cp;
l = (l<<8) + *++cp;
if (l == 0)
(void)printf("\t0.0.0.0");
else
(void)printf("\t%s",
pr_addr(ntohl(l)));
hlen -= 4;
j -= 4;
i += 4;
if (j <= IPOPT_MINOFF)
break;
if (i >= MAX_IPOPTLEN) {
(void)printf("\t(truncated route)");
break;
}
(void)putchar('\n');
}
}
break;
case IPOPT_RR:
j = *++cp; /* get length */
i = *++cp; /* and pointer */
hlen -= 2;
if (i > j)
i = j;
i -= IPOPT_MINOFF;
if (i <= 0)
continue;
if (i == old_rrlen &&
cp == (u_char *)buf + sizeof(struct ip) + 2 &&
!memcmp(cp, old_rr, i) &&
!(options & F_FLOOD)) {
(void)printf("\t(same route)");
i = ((i + 3) / 4) * 4;
hlen -= i;
cp += i;
break;
}
if (i < MAX_IPOPTLEN) {
old_rrlen = i;
memcpy(old_rr, cp, i);
} else
old_rrlen = 0;
(void)printf("\nRR: ");
j = 0;
for (;;) {
l = *++cp;
l = (l<<8) + *++cp;
l = (l<<8) + *++cp;
l = (l<<8) + *++cp;
if (l == 0)
(void)printf("\t0.0.0.0");
else
(void)printf("\t%s", pr_addr(ntohl(l)));
hlen -= 4;
i -= 4;
j += 4;
if (i <= 0)
break;
if (j >= MAX_IPOPTLEN) {
(void)printf("\t(truncated route)");
break;
}
(void)putchar('\n');
}
break;
case IPOPT_NOP:
(void)printf("\nNOP");
break;
default:
(void)printf("\nunknown option %x", *cp);
hlen = hlen - (cp[IPOPT_OLEN] - 1);
cp = cp + (cp[IPOPT_OLEN] - 1);
break;
}
if (!(options & F_FLOOD)) {
(void)putchar('\n');
(void)fflush(stdout);
}
}
/*
* in_cksum --
* Checksum routine for Internet Protocol family headers (C Version)
*/
int
in_cksum(u_short *addr, int len)
{
int nleft = len;
u_short *w = addr;
int sum = 0;
u_short answer = 0;
/*
* Our algorithm is simple, using a 32 bit accumulator (sum), we add
* sequential 16 bit words to it, and at the end, fold back all the
* carry bits from the top 16 bits into the lower 16 bits.
*/
while (nleft > 1) {
sum += *w++;
nleft -= 2;
}
/* mop up an odd byte, if necessary */
if (nleft == 1) {
*(u_char *)(&answer) = *(u_char *)w ;
sum += answer;
}
/* add back carry outs from top 16 bits to low 16 bits */
sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */
sum += (sum >> 16); /* add carry */
answer = ~sum; /* truncate to 16 bits */
return(answer);
}
void
summary(int header, int sig)
{
char buf[8192], buft[8192];
buf[0] = '\0';
if (!sig) {
(void)putchar('\r');
(void)fflush(stdout);
} else
strlcat(buf, "\r", sizeof buf);
if (header) {
snprintf(buft, sizeof buft, "--- %s ping statistics ---\n",
hostname);
strlcat(buf, buft, sizeof buf);
}
snprintf(buft, sizeof buft, "%ld packets transmitted, ", ntransmitted);
strlcat(buf, buft, sizeof buf);
snprintf(buft, sizeof buft, "%ld packets received, ", nreceived);
strlcat(buf, buft, sizeof buf);
if (nrepeats) {
snprintf(buft, sizeof buft, "%ld duplicates, ", nrepeats);
strlcat(buf, buft, sizeof buf);
}
if (ntransmitted) {
if (nreceived > ntransmitted)
snprintf(buft, sizeof buft,
"-- somebody's duplicating packets!");
else
snprintf(buft, sizeof buft, "%.1f%% packet loss",
((((double)ntransmitted - nreceived) * 100) /
ntransmitted));
strlcat(buf, buft, sizeof buf);
}
strlcat(buf, "\n", sizeof buf);
if (nreceived && timing) {
quad_t num = nreceived + nrepeats;
quad_t avg = tsum / num;
quad_t dev = qsqrt(tsumsq / num - avg * avg);
snprintf(buft, sizeof buft, "round-trip min/avg/max/std-dev = "
"%d.%03d/%d.%03d/%d.%03d/%d.%03d ms\n",
(int)(tmin / 1000), (int)(tmin % 1000),
(int)(avg / 1000), (int)(avg % 1000),
(int)(tmax / 1000), (int)(tmax % 1000),
(int)(dev / 1000), (int)(dev % 1000));
strlcat(buf, buft, sizeof buf);
}
write(STDOUT_FILENO, buf, strlen(buf)); /* XXX atomicio? */
}
quad_t
qsqrt(quad_t qdev)
{
quad_t y, x = 1;
if (!qdev)
return(0);
do { /* newton was a stinker */
y = x;
x = qdev / x;
x += y;
x /= 2;
} while ((x - y) > 1 || (x - y) < -1);
return(x);
}
/*
* finish --
* Print out statistics, and give up.
*/
void
finish(int signo)
{
(void)signal(SIGINT, SIG_IGN);
summary(1, 0);
if (signo)
_exit(nreceived ? 0 : 1);
else
exit(nreceived ? 0 : 1);
}
#ifdef notdef
static char *ttab[] = {
"Echo Reply", /* ip + seq + udata */
"Dest Unreachable", /* net, host, proto, port, frag, sr + IP */
"Source Quench", /* IP */
"Redirect", /* redirect type, gateway, + IP */
"Echo",
"Time Exceeded", /* transit, frag reassem + IP */
"Parameter Problem", /* pointer + IP */
"Timestamp", /* id + seq + three timestamps */
"Timestamp Reply", /* " */
"Info Request", /* id + sq */
"Info Reply" /* " */
};
#endif
/*
* pr_icmph --
* Print a descriptive string about an ICMP header.
*/
void
pr_icmph(struct icmp *icp)
{
switch(icp->icmp_type) {
case ICMP_ECHOREPLY:
(void)printf("Echo Reply\n");
/* XXX ID + Seq + Data */
break;
case ICMP_UNREACH:
switch(icp->icmp_code) {
case ICMP_UNREACH_NET:
(void)printf("Destination Net Unreachable\n");
break;
case ICMP_UNREACH_HOST:
(void)printf("Destination Host Unreachable\n");
break;
case ICMP_UNREACH_PROTOCOL:
(void)printf("Destination Protocol Unreachable\n");
break;
case ICMP_UNREACH_PORT:
(void)printf("Destination Port Unreachable\n");
break;
case ICMP_UNREACH_NEEDFRAG:
if (icp->icmp_nextmtu != 0)
(void)printf("frag needed and DF set (MTU %d)\n",
ntohs(icp->icmp_nextmtu));
else
(void)printf("frag needed and DF set\n");
break;
case ICMP_UNREACH_SRCFAIL:
(void)printf("Source Route Failed\n");
break;
case ICMP_UNREACH_NET_UNKNOWN:
(void)printf("Network Unknown\n");
break;
case ICMP_UNREACH_HOST_UNKNOWN:
(void)printf("Host Unknown\n");
break;
case ICMP_UNREACH_ISOLATED:
(void)printf("Source Isolated\n");
break;
case ICMP_UNREACH_NET_PROHIB:
(void)printf("Dest. Net Administratively Prohibited\n");
break;
case ICMP_UNREACH_HOST_PROHIB:
(void)printf("Dest. Host Administratively Prohibited\n");
break;
case ICMP_UNREACH_TOSNET:
(void)printf("Destination Net Unreachable for TOS\n");
break;
case ICMP_UNREACH_TOSHOST:
(void)printf("Desination Host Unreachable for TOS\n");
break;
case ICMP_UNREACH_FILTER_PROHIB:
(void)printf("Route administratively prohibited\n");
break;
case ICMP_UNREACH_HOST_PRECEDENCE:
(void)printf("Host Precedence Violation\n");
break;
case ICMP_UNREACH_PRECEDENCE_CUTOFF:
(void)printf("Precedence Cutoff\n");
break;
default:
(void)printf("Dest Unreachable, Unknown Code: %d\n",
icp->icmp_code);
break;
}
/* Print returned IP header information */
#ifndef icmp_data
pr_retip(&icp->icmp_ip);
#else
pr_retip((struct ip *)icp->icmp_data);
#endif
break;
case ICMP_SOURCEQUENCH:
(void)printf("Source Quench\n");
#ifndef icmp_data
pr_retip(&icp->icmp_ip);
#else
pr_retip((struct ip *)icp->icmp_data);
#endif
break;
case ICMP_REDIRECT:
switch(icp->icmp_code) {
case ICMP_REDIRECT_NET:
(void)printf("Redirect Network");
break;
case ICMP_REDIRECT_HOST:
(void)printf("Redirect Host");
break;
case ICMP_REDIRECT_TOSNET:
(void)printf("Redirect Type of Service and Network");
break;
case ICMP_REDIRECT_TOSHOST:
(void)printf("Redirect Type of Service and Host");
break;
default:
(void)printf("Redirect, Unknown Code: %d", icp->icmp_code);
break;
}
(void)printf("(New addr: %s)\n",
inet_ntoa(icp->icmp_gwaddr));
#ifndef icmp_data
pr_retip(&icp->icmp_ip);
#else
pr_retip((struct ip *)icp->icmp_data);
#endif
break;
case ICMP_ECHO:
(void)printf("Echo Request\n");
/* XXX ID + Seq + Data */
break;
case ICMP_ROUTERADVERT:
/* RFC1256 */
(void)printf("Router Discovery Advertisement\n");
(void)printf("(%d entries, lifetime %d seconds)\n",
icp->icmp_num_addrs, ntohs(icp->icmp_lifetime));
break;
case ICMP_ROUTERSOLICIT:
/* RFC1256 */
(void)printf("Router Discovery Solicitation\n");
break;
case ICMP_TIMXCEED:
switch(icp->icmp_code) {
case ICMP_TIMXCEED_INTRANS:
(void)printf("Time to live exceeded\n");
break;
case ICMP_TIMXCEED_REASS:
(void)printf("Frag reassembly time exceeded\n");
break;
default:
(void)printf("Time exceeded, Unknown Code: %d\n",
icp->icmp_code);
break;
}
#ifndef icmp_data
pr_retip(&icp->icmp_ip);
#else
pr_retip((struct ip *)icp->icmp_data);
#endif
break;
case ICMP_PARAMPROB:
switch(icp->icmp_code) {
case ICMP_PARAMPROB_OPTABSENT:
(void)printf("Parameter problem, required option "
"absent: pointer = 0x%02x\n",
ntohs(icp->icmp_hun.ih_pptr));
break;
default:
(void)printf("Parameter problem: pointer = 0x%02x\n",
ntohs(icp->icmp_hun.ih_pptr));
break;
}
#ifndef icmp_data
pr_retip(&icp->icmp_ip);
#else
pr_retip((struct ip *)icp->icmp_data);
#endif
break;
case ICMP_TSTAMP:
(void)printf("Timestamp\n");
/* XXX ID + Seq + 3 timestamps */
break;
case ICMP_TSTAMPREPLY:
(void)printf("Timestamp Reply\n");
/* XXX ID + Seq + 3 timestamps */
break;
case ICMP_IREQ:
(void)printf("Information Request\n");
/* XXX ID + Seq */
break;
case ICMP_IREQREPLY:
(void)printf("Information Reply\n");
/* XXX ID + Seq */
break;
#ifdef ICMP_MASKREQ
case ICMP_MASKREQ:
(void)printf("Address Mask Request\n");
break;
#endif
#ifdef ICMP_MASKREPLY
case ICMP_MASKREPLY:
(void)printf("Address Mask Reply (Mask 0x%08x)\n",
ntohl(icp->icmp_mask));
break;
#endif
default:
(void)printf("Unknown ICMP type: %d\n", icp->icmp_type);
}
}
/*
* pr_iph --
* Print an IP header with options.
*/
void
pr_iph(struct ip *ip)
{
int hlen;
u_char *cp;
hlen = ip->ip_hl << 2;
cp = (u_char *)ip + 20; /* point to options */
(void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst Data\n");
(void)printf(" %1x %1x %02x %04x %04x",
ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id);
(void)printf(" %1x %04x", ((ip->ip_off) & 0xe000) >> 13,
(ip->ip_off) & 0x1fff);
(void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, ip->ip_sum);
(void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr));
(void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr));
/* dump and option bytes */
while (hlen-- > 20) {
(void)printf("%02x", *cp++);
}
(void)putchar('\n');
}
/*
* pr_addr --
* Return an ascii host address as a dotted quad and optionally with
* a hostname.
*/
char *
pr_addr(in_addr_t a)
{
struct hostent *hp;
struct in_addr in;
static char buf[16+3+MAXHOSTNAMELEN];
in.s_addr = a;
if ((options & F_NUMERIC) ||
!(hp = gethostbyaddr((char *)&in.s_addr, sizeof(in.s_addr), AF_INET)))
(void)snprintf(buf, sizeof buf, "%s", inet_ntoa(in));
else
(void)snprintf(buf, sizeof buf, "%s (%s)", hp->h_name,
inet_ntoa(in));
return(buf);
}
/*
* pr_retip --
* Dump some info on a returned (via ICMP) IP packet.
*/
void
pr_retip(struct ip *ip)
{
int hlen;
u_char *cp;
pr_iph(ip);
hlen = ip->ip_hl << 2;
cp = (u_char *)ip + hlen;
if (ip->ip_p == 6)
(void)printf("TCP: from port %u, to port %u (decimal)\n",
(*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
else if (ip->ip_p == 17)
(void)printf("UDP: from port %u, to port %u (decimal)\n",
(*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
}
void
fill(char *bp, char *patp)
{
int ii, jj, kk;
int pat[16];
char *cp;
for (cp = patp; *cp; cp++)
if (!isxdigit(*cp))
errx(1, "patterns must be specified as hex digits");
ii = sscanf(patp,
"%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
&pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
&pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
&pat[13], &pat[14], &pat[15]);
if (ii > 0)
for (kk = 0;
kk <= MAXPAYLOAD - (8 + sizeof(struct tvi) + ii);
kk += ii)
for (jj = 0; jj < ii; ++jj)
bp[jj + kk] = pat[jj];
if (!(options & F_QUIET)) {
(void)printf("PATTERN: 0x");
for (jj = 0; jj < ii; ++jj)
(void)printf("%02x", bp[jj] & 0xFF);
(void)printf("\n");
}
}
/*
* when we get types of ICMP message with parts of the orig. datagram
* we want to try to assure ourselves that it is from this instance
* of ping, and not say, a refused finger connection or something
*/
int
check_icmph(struct ip *iph)
{
struct icmp *icmph;
/* only allow IP version 4 */
if (iph->ip_v != 4)
return 0;
/* Only allow ICMP */
if (iph->ip_p != IPPROTO_ICMP)
return 0;
icmph = (struct icmp *) (iph + (4 * iph->ip_hl));
/* make sure it is in response to an ECHO request */
if (icmph->icmp_type != 8)
return 0;
/* ok, make sure it has the right id on it */
if (icmph->icmp_hun.ih_idseq.icd_id != ident)
return 0;
return 1;
}
void
usage(void)
{
(void)fprintf(stderr,
"usage: ping [-DdfjLnqRrv] [-c count] [-I ifaddr] [-i wait]\n"
"\t[-l preload] [-p pattern] [-s packetsize] [-T tos] [-t ttl]\n"
"\t[-w maxwait] host\n");
exit(1);
}
|