sbin/ping/ping.c

   1 /*
   2  * Copyright (c) 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Mike Muuss.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #if 0
  34 #ifndef lint
  35 static const char copyright[] =
  36 "@(#) Copyright (c) 1989, 1993\n\
  37         The Regents of the University of California.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #ifndef lint
  41 static char sccsid[] = "@(#)ping.c      8.1 (Berkeley) 6/5/93";
  42 #endif /* not lint */
  43 #endif
  44 #include <sys/cdefs.h>
  45 __FBSDID("$FreeBSD$");
  46
  47 /*
  48  *                      P I N G . C
  49  *
  50  * Using the Internet Control Message Protocol (ICMP) "ECHO" facility,
  51  * measure round-trip-delays and packet loss across network paths.
  52  *
  53  * Author -
  54  *      Mike Muuss
  55  *      U. S. Army Ballistic Research Laboratory
  56  *      December, 1983
  57  *
  58  * Status -
  59  *      Public Domain.  Distribution Unlimited.
  60  * Bugs -
  61  *      More statistics could always be gathered.
  62  *      This program has to run SUID to ROOT to access the ICMP socket.
  63  */
  64
  65 #include <sys/param.h>          /* NB: we rely on this for <sys/types.h> */
  66 #include <sys/capsicum.h>
  67 #include <sys/socket.h>
  68 #include <sys/sysctl.h>
  69 #include <sys/time.h>
  70 #include <sys/uio.h>
  71
  72 #include <netinet/in.h>
  73 #include <netinet/in_systm.h>
  74 #include <netinet/ip.h>
  75 #include <netinet/ip_icmp.h>
  76 #include <netinet/ip_var.h>
  77 #include <arpa/inet.h>
  78
  79 #include <libcasper.h>
  80 #include <casper/cap_dns.h>
  81
  82 #ifdef IPSEC
  83 #include <netipsec/ipsec.h>
  84 #endif /*IPSEC*/
  85
  86 #include <ctype.h>
  87 #include <err.h>
  88 #include <errno.h>
  89 #include <math.h>
  90 #include <netdb.h>
  91 #include <signal.h>
  92 #include <stdio.h>
  93 #include <stdlib.h>
  94 #include <string.h>
  95 #include <sysexits.h>
  96 #include <unistd.h>
  97
  98 #define INADDR_LEN      ((int)sizeof(in_addr_t))
  99 #define TIMEVAL_LEN     ((int)sizeof(struct tv32))
 100 #define MASK_LEN        (ICMP_MASKLEN - ICMP_MINLEN)
 101 #define TS_LEN          (ICMP_TSLEN - ICMP_MINLEN)
 102 #define DEFDATALEN      56              /* default data length */
 103 #define FLOOD_BACKOFF   20000           /* usecs to back off if F_FLOOD mode */
 104                                         /* runs out of buffer space */
 105 #define MAXIPLEN        (sizeof(struct ip) + MAX_IPOPTLEN)
 106 #define MAXICMPLEN      (ICMP_ADVLENMIN + MAX_IPOPTLEN)
 107 #define MAXWAIT         10000           /* max ms to wait for response */
 108 #define MAXALARM        (60 * 60)       /* max seconds for alarm timeout */
 109 #define MAXTOS          255
 110
 111 #define A(bit)          rcvd_tbl[(bit)>>3]      /* identify byte in array */
 112 #define B(bit)          (1 << ((bit) & 0x07))   /* identify bit in byte */
 113 #define SET(bit)        (A(bit) |= B(bit))
 114 #define CLR(bit)        (A(bit) &= (~B(bit)))
 115 #define TST(bit)        (A(bit) & B(bit))
 116
 117 struct tv32 {
 118         int32_t tv32_sec;
 119         int32_t tv32_usec;
 120 };
 121
 122 /* various options */
 123 static int options;
 124 #define F_FLOOD         0x0001
 125 #define F_INTERVAL      0x0002
 126 #define F_NUMERIC       0x0004
 127 #define F_PINGFILLED    0x0008
 128 #define F_QUIET         0x0010
 129 #define F_RROUTE        0x0020
 130 #define F_SO_DEBUG      0x0040
 131 #define F_SO_DONTROUTE  0x0080
 132 #define F_VERBOSE       0x0100
 133 #define F_QUIET2        0x0200
 134 #define F_NOLOOP        0x0400
 135 #define F_MTTL          0x0800
 136 #define F_MIF           0x1000
 137 #define F_AUDIBLE       0x2000
 138 #ifdef IPSEC
 139 #ifdef IPSEC_POLICY_IPSEC
 140 #define F_POLICY        0x4000
 141 #endif /*IPSEC_POLICY_IPSEC*/
 142 #endif /*IPSEC*/
 143 #define F_TTL           0x8000
 144 #define F_MISSED        0x10000
 145 #define F_ONCE          0x20000
 146 #define F_HDRINCL       0x40000
 147 #define F_MASK          0x80000
 148 #define F_TIME          0x100000
 149 #define F_SWEEP         0x200000
 150 #define F_WAITTIME      0x400000
 151
 152 /*
 153  * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum
 154  * number of received sequence numbers we can keep track of.  Change 128
 155  * to 8192 for complete accuracy...
 156  */
 157 #define MAX_DUP_CHK     (8 * 128)
 158 static int mx_dup_ck = MAX_DUP_CHK;
 159 static char rcvd_tbl[MAX_DUP_CHK / 8];
 160
 161 static struct sockaddr_in whereto;      /* who to ping */
 162 static int datalen = DEFDATALEN;
 163 static int maxpayload;
 164 static int ssend;               /* send socket file descriptor */
 165 static int srecv;               /* receive socket file descriptor */
 166 static u_char outpackhdr[IP_MAXPACKET], *outpack;
 167 static char BBELL = '\a';       /* characters written for MISSED and AUDIBLE */
 168 static char BSPACE = '\b';      /* characters written for flood */
 169 static char DOT = '.';
 170 static char *hostname;
 171 static char *shostname;
 172 static int ident;               /* process id to identify our packets */
 173 static int uid;                 /* cached uid for micro-optimization */
 174 static u_char icmp_type = ICMP_ECHO;
 175 static u_char icmp_type_rsp = ICMP_ECHOREPLY;
 176 static int phdr_len = 0;
 177 static int send_len;
 178
 179 /* counters */
 180 static long nmissedmax;         /* max value of ntransmitted - nreceived - 1 */
 181 static long npackets;           /* max packets to transmit */
 182 static long nreceived;          /* # of packets we got back */
 183 static long nrepeats;           /* number of duplicates */
 184 static long ntransmitted;       /* sequence # for outbound packets = #sent */
 185 static long snpackets;                  /* max packets to transmit in one sweep */
 186 static long sntransmitted;      /* # of packets we sent in this sweep */
 187 static int sweepmax;            /* max value of payload in sweep */
 188 static int sweepmin = 0;        /* start value of payload in sweep */
 189 static int sweepincr = 1;       /* payload increment in sweep */
 190 static int interval = 1000;     /* interval between packets, ms */
 191 static int waittime = MAXWAIT;  /* timeout for each packet */
 192 static long nrcvtimeout = 0;    /* # of packets we got back after waittime */
 193
 194 /* timing */
 195 static int timing;              /* flag to do timing */
 196 static double tmin = 999999999.0;       /* minimum round trip time */
 197 static double tmax = 0.0;       /* maximum round trip time */
 198 static double tsum = 0.0;       /* sum of all times, for doing average */
 199 static double tsumsq = 0.0;     /* sum of all times squared, for std. dev. */
 200
 201 /* nonzero if we've been told to finish up */
 202 static volatile sig_atomic_t finish_up;
 203 static volatile sig_atomic_t siginfo_p;
 204
 205 static cap_channel_t *capdns;
 206
 207 static void fill(char *, char *);
 208 static u_short in_cksum(u_short *, int);
 209 static cap_channel_t *capdns_setup(void);
 210 static void check_status(void);
 211 static void finish(void) __dead2;
 212 static void pinger(void);
 213 static char *pr_addr(struct in_addr);
 214 static char *pr_ntime(n_time);
 215 static void pr_icmph(struct icmp *);
 216 static void pr_iph(struct ip *);
 217 static void pr_pack(char *, int, struct sockaddr_in *, struct timeval *);
 218 static void pr_retip(struct ip *);
 219 static void status(int);
 220 static void stopit(int);
 221 static void tvsub(struct timeval *, const struct timeval *);
 222 static void usage(void) __dead2;
 223
 224 int
 225 main(int argc, char *const *argv)
 226 {
 227         struct sockaddr_in from, sock_in;
 228         struct in_addr ifaddr;
 229         struct timeval last, intvl;
 230         struct iovec iov;
 231         struct ip *ip;
 232         struct msghdr msg;
 233         struct sigaction si_sa;
 234         size_t sz;
 235         u_char *datap, packet[IP_MAXPACKET] __aligned(4);
 236         char *ep, *source, *target, *payload;
 237         struct hostent *hp;
 238 #ifdef IPSEC_POLICY_IPSEC
 239         char *policy_in, *policy_out;
 240 #endif
 241         struct sockaddr_in *to;
 242         double t;
 243         u_long alarmtimeout, ultmp;
 244         int almost_done, ch, df, hold, i, icmp_len, mib[4], preload;
 245         int ssend_errno, srecv_errno, tos, ttl;
 246         char ctrl[CMSG_SPACE(sizeof(struct timeval))];
 247         char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN];
 248 #ifdef IP_OPTIONS
 249         char rspace[MAX_IPOPTLEN];      /* record route space */
 250 #endif
 251         unsigned char loop, mttl;
 252
 253         payload = source = NULL;
 254 #ifdef IPSEC_POLICY_IPSEC
 255         policy_in = policy_out = NULL;
 256 #endif
 257         cap_rights_t rights;
 258         bool cansandbox;
 259
 260         /*
 261          * Do the stuff that we need root priv's for *first*, and
 262          * then drop our setuid bit.  Save error reporting for
 263          * after arg parsing.
 264          *
 265          * Historicaly ping was using one socket 's' for sending and for
 266          * receiving. After capsicum(4) related changes we use two
 267          * sockets. It was done for special ping use case - when user
 268          * issue ping on multicast or broadcast address replies come
 269          * from different addresses, not from the address we
 270          * connect(2)'ed to, and send socket do not receive those
 271          * packets.
 272          */
 273         ssend = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
 274         ssend_errno = errno;
 275         srecv = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP);
 276         srecv_errno = errno;
 277
 278         if (setuid(getuid()) != 0)
 279                 err(EX_NOPERM, "setuid() failed");
 280         uid = getuid();
 281
 282         if (ssend < 0) {
 283                 errno = ssend_errno;
 284                 err(EX_OSERR, "ssend socket");
 285         }
 286
 287         if (srecv < 0) {
 288                 errno = srecv_errno;
 289                 err(EX_OSERR, "srecv socket");
 290         }
 291
 292         alarmtimeout = df = preload = tos = 0;
 293
 294         outpack = outpackhdr + sizeof(struct ip);
 295         while ((ch = getopt(argc, argv,
 296                 "Aac:DdfG:g:h:I:i:Ll:M:m:nop:QqRrS:s:T:t:vW:z:"
 297 #ifdef IPSEC
 298 #ifdef IPSEC_POLICY_IPSEC
 299                 "P:"
 300 #endif /*IPSEC_POLICY_IPSEC*/
 301 #endif /*IPSEC*/
 302                 )) != -1)
 303         {
 304                 switch(ch) {
 305                 case 'A':
 306                         options |= F_MISSED;
 307                         break;
 308                 case 'a':
 309                         options |= F_AUDIBLE;
 310                         break;
 311                 case 'c':
 312                         ultmp = strtoul(optarg, &ep, 0);
 313                         if (*ep || ep == optarg || ultmp > LONG_MAX || !ultmp)
 314                                 errx(EX_USAGE,
 315                                     "invalid count of packets to transmit: `%s'",
 316                                     optarg);
 317                         npackets = ultmp;
 318                         break;
 319                 case 'D':
 320                         options |= F_HDRINCL;
 321                         df = 1;
 322                         break;
 323                 case 'd':
 324                         options |= F_SO_DEBUG;
 325                         break;
 326                 case 'f':
 327                         if (uid) {
 328                                 errno = EPERM;
 329                                 err(EX_NOPERM, "-f flag");
 330                         }
 331                         options |= F_FLOOD;
 332                         setbuf(stdout, (char *)NULL);
 333                         break;
 334                 case 'G': /* Maximum packet size for ping sweep */
 335                         ultmp = strtoul(optarg, &ep, 0);
 336                         if (*ep || ep == optarg)
 337                                 errx(EX_USAGE, "invalid packet size: `%s'",
 338                                     optarg);
 339                         if (uid != 0 && ultmp > DEFDATALEN) {
 340                                 errno = EPERM;
 341                                 err(EX_NOPERM,
 342                                     "packet size too large: %lu > %u",
 343                                     ultmp, DEFDATALEN);
 344                         }
 345                         options |= F_SWEEP;
 346                         sweepmax = ultmp;
 347                         break;
 348                 case 'g': /* Minimum packet size for ping sweep */
 349                         ultmp = strtoul(optarg, &ep, 0);
 350                         if (*ep || ep == optarg)
 351                                 errx(EX_USAGE, "invalid packet size: `%s'",
 352                                     optarg);
 353                         if (uid != 0 && ultmp > DEFDATALEN) {
 354                                 errno = EPERM;
 355                                 err(EX_NOPERM,
 356                                     "packet size too large: %lu > %u",
 357                                     ultmp, DEFDATALEN);
 358                         }
 359                         options |= F_SWEEP;
 360                         sweepmin = ultmp;
 361                         break;
 362                 case 'h': /* Packet size increment for ping sweep */
 363                         ultmp = strtoul(optarg, &ep, 0);
 364                         if (*ep || ep == optarg || ultmp < 1)
 365                                 errx(EX_USAGE, "invalid increment size: `%s'",
 366                                     optarg);
 367                         if (uid != 0 && ultmp > DEFDATALEN) {
 368                                 errno = EPERM;
 369                                 err(EX_NOPERM,
 370                                     "packet size too large: %lu > %u",
 371                                     ultmp, DEFDATALEN);
 372                         }
 373                         options |= F_SWEEP;
 374                         sweepincr = ultmp;
 375                         break;
 376                 case 'I':               /* multicast interface */
 377                         if (inet_aton(optarg, &ifaddr) == 0)
 378                                 errx(EX_USAGE,
 379                                     "invalid multicast interface: `%s'",
 380                                     optarg);
 381                         options |= F_MIF;
 382                         break;
 383                 case 'i':               /* wait between sending packets */
 384                         t = strtod(optarg, &ep) * 1000.0;
 385                         if (*ep || ep == optarg || t > (double)INT_MAX)
 386                                 errx(EX_USAGE, "invalid timing interval: `%s'",
 387                                     optarg);
 388                         options |= F_INTERVAL;
 389                         interval = (int)t;
 390                         if (uid && interval < 1000) {
 391                                 errno = EPERM;
 392                                 err(EX_NOPERM, "-i interval too short");
 393                         }
 394                         break;
 395                 case 'L':
 396                         options |= F_NOLOOP;
 397                         loop = 0;
 398                         break;
 399                 case 'l':
 400                         ultmp = strtoul(optarg, &ep, 0);
 401                         if (*ep || ep == optarg || ultmp > INT_MAX)
 402                                 errx(EX_USAGE,
 403                                     "invalid preload value: `%s'", optarg);
 404                         if (uid) {
 405                                 errno = EPERM;
 406                                 err(EX_NOPERM, "-l flag");
 407                         }
 408                         preload = ultmp;
 409                         break;
 410                 case 'M':
 411                         switch(optarg[0]) {
 412                         case 'M':
 413                         case 'm':
 414                                 options |= F_MASK;
 415                                 break;
 416                         case 'T':
 417                         case 't':
 418                                 options |= F_TIME;
 419                                 break;
 420                         default:
 421                                 errx(EX_USAGE, "invalid message: `%c'", optarg[0]);
 422                                 break;
 423                         }
 424                         break;
 425                 case 'm':               /* TTL */
 426                         ultmp = strtoul(optarg, &ep, 0);
 427                         if (*ep || ep == optarg || ultmp > MAXTTL)
 428                                 errx(EX_USAGE, "invalid TTL: `%s'", optarg);
 429                         ttl = ultmp;
 430                         options |= F_TTL;
 431                         break;
 432                 case 'n':
 433                         options |= F_NUMERIC;
 434                         break;
 435                 case 'o':
 436                         options |= F_ONCE;
 437                         break;
 438 #ifdef IPSEC
 439 #ifdef IPSEC_POLICY_IPSEC
 440                 case 'P':
 441                         options |= F_POLICY;
 442                         if (!strncmp("in", optarg, 2))
 443                                 policy_in = strdup(optarg);
 444                         else if (!strncmp("out", optarg, 3))
 445                                 policy_out = strdup(optarg);
 446                         else
 447                                 errx(1, "invalid security policy");
 448                         break;
 449 #endif /*IPSEC_POLICY_IPSEC*/
 450 #endif /*IPSEC*/
 451                 case 'p':               /* fill buffer with user pattern */
 452                         options |= F_PINGFILLED;
 453                         payload = optarg;
 454                         break;
 455                 case 'Q':
 456                         options |= F_QUIET2;
 457                         break;
 458                 case 'q':
 459                         options |= F_QUIET;
 460                         break;
 461                 case 'R':
 462                         options |= F_RROUTE;
 463                         break;
 464                 case 'r':
 465                         options |= F_SO_DONTROUTE;
 466                         break;
 467                 case 'S':
 468                         source = optarg;
 469                         break;
 470                 case 's':               /* size of packet to send */
 471                         ultmp = strtoul(optarg, &ep, 0);
 472                         if (*ep || ep == optarg)
 473                                 errx(EX_USAGE, "invalid packet size: `%s'",
 474                                     optarg);
 475                         if (uid != 0 && ultmp > DEFDATALEN) {
 476                                 errno = EPERM;
 477                                 err(EX_NOPERM,
 478                                     "packet size too large: %lu > %u",
 479                                     ultmp, DEFDATALEN);
 480                         }
 481                         datalen = ultmp;
 482                         break;
 483                 case 'T':               /* multicast TTL */
 484                         ultmp = strtoul(optarg, &ep, 0);
 485                         if (*ep || ep == optarg || ultmp > MAXTTL)
 486                                 errx(EX_USAGE, "invalid multicast TTL: `%s'",
 487                                     optarg);
 488                         mttl = ultmp;
 489                         options |= F_MTTL;
 490                         break;
 491                 case 't':
 492                         alarmtimeout = strtoul(optarg, &ep, 0);
 493                         if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX))
 494                                 errx(EX_USAGE, "invalid timeout: `%s'",
 495                                     optarg);
 496                         if (alarmtimeout > MAXALARM)
 497                                 errx(EX_USAGE, "invalid timeout: `%s' > %d",
 498                                     optarg, MAXALARM);
 499                         alarm((int)alarmtimeout);
 500                         break;
 501                 case 'v':
 502                         options |= F_VERBOSE;
 503                         break;
 504                 case 'W':               /* wait ms for answer */
 505                         t = strtod(optarg, &ep);
 506                         if (*ep || ep == optarg || t > (double)INT_MAX)
 507                                 errx(EX_USAGE, "invalid timing interval: `%s'",
 508                                     optarg);
 509                         options |= F_WAITTIME;
 510                         waittime = (int)t;
 511                         break;
 512                 case 'z':
 513                         options |= F_HDRINCL;
 514                         ultmp = strtoul(optarg, &ep, 0);
 515                         if (*ep || ep == optarg || ultmp > MAXTOS)
 516                                 errx(EX_USAGE, "invalid TOS: `%s'", optarg);
 517                         tos = ultmp;
 518                         break;
 519                 default:
 520                         usage();
 521                 }
 522         }
 523
 524         if (argc - optind != 1)
 525                 usage();
 526         target = argv[optind];
 527
 528         switch (options & (F_MASK|F_TIME)) {
 529         case 0: break;
 530         case F_MASK:
 531                 icmp_type = ICMP_MASKREQ;
 532                 icmp_type_rsp = ICMP_MASKREPLY;
 533                 phdr_len = MASK_LEN;
 534                 if (!(options & F_QUIET))
 535                         (void)printf("ICMP_MASKREQ\n");
 536                 break;
 537         case F_TIME:
 538                 icmp_type = ICMP_TSTAMP;
 539                 icmp_type_rsp = ICMP_TSTAMPREPLY;
 540                 phdr_len = TS_LEN;
 541                 if (!(options & F_QUIET))
 542                         (void)printf("ICMP_TSTAMP\n");
 543                 break;
 544         default:
 545                 errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive.");
 546                 break;
 547         }
 548         icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len;
 549         if (options & F_RROUTE)
 550                 icmp_len += MAX_IPOPTLEN;
 551         maxpayload = IP_MAXPACKET - icmp_len;
 552         if (datalen > maxpayload)
 553                 errx(EX_USAGE, "packet size too large: %d > %d", datalen,
 554                     maxpayload);
 555         send_len = icmp_len + datalen;
 556         datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN];
 557         if (options & F_PINGFILLED) {
 558                 fill((char *)datap, payload);
 559         }
 560         capdns = capdns_setup();
 561         if (source) {
 562                 bzero((char *)&sock_in, sizeof(sock_in));
 563                 sock_in.sin_family = AF_INET;
 564                 if (inet_aton(source, &sock_in.sin_addr) != 0) {
 565                         shostname = source;
 566                 } else {
 567                         if (capdns != NULL)
 568                                 hp = cap_gethostbyname2(capdns, source,
 569                                     AF_INET);
 570                         else
 571                                 hp = gethostbyname2(source, AF_INET);
 572                         if (!hp)
 573                                 errx(EX_NOHOST, "cannot resolve %s: %s",
 574                                     source, hstrerror(h_errno));
 575
 576                         sock_in.sin_len = sizeof sock_in;
 577                         if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) ||
 578                             hp->h_length < 0)
 579                                 errx(1, "gethostbyname2: illegal address");
 580                         memcpy(&sock_in.sin_addr, hp->h_addr_list[0],
 581                             sizeof(sock_in.sin_addr));
 582                         (void)strncpy(snamebuf, hp->h_name,
 583                             sizeof(snamebuf) - 1);
 584                         snamebuf[sizeof(snamebuf) - 1] = '\0';
 585                         shostname = snamebuf;
 586                 }
 587                 if (bind(ssend, (struct sockaddr *)&sock_in, sizeof sock_in) ==
 588                     -1)
 589                         err(1, "bind");
 590         }
 591
 592         bzero(&whereto, sizeof(whereto));
 593         to = &whereto;
 594         to->sin_family = AF_INET;
 595         to->sin_len = sizeof *to;
 596         if (inet_aton(target, &to->sin_addr) != 0) {
 597                 hostname = target;
 598         } else {
 599                 if (capdns != NULL)
 600                         hp = cap_gethostbyname2(capdns, target, AF_INET);
 601                 else
 602                         hp = gethostbyname2(target, AF_INET);
 603                 if (!hp)
 604                         errx(EX_NOHOST, "cannot resolve %s: %s",
 605                             target, hstrerror(h_errno));
 606
 607                 if ((unsigned)hp->h_length > sizeof(to->sin_addr))
 608                         errx(1, "gethostbyname2 returned an illegal address");
 609                 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr);
 610                 (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1);
 611                 hnamebuf[sizeof(hnamebuf) - 1] = '\0';
 612                 hostname = hnamebuf;
 613         }
 614
 615         /* From now on we will use only reverse DNS lookups. */
 616         if (capdns != NULL) {
 617                 const char *types[1];
 618
 619                 types[0] = "ADDR";
 620                 if (cap_dns_type_limit(capdns, types, 1) < 0)
 621                         err(1, "unable to limit access to system.dns service");
 622         }
 623
 624         if (connect(ssend, (struct sockaddr *)&whereto, sizeof(whereto)) != 0)
 625                 err(1, "connect");
 626
 627         if (options & F_FLOOD && options & F_INTERVAL)
 628                 errx(EX_USAGE, "-f and -i: incompatible options");
 629
 630         if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
 631                 errx(EX_USAGE,
 632                     "-f flag cannot be used with multicast destination");
 633         if (options & (F_MIF | F_NOLOOP | F_MTTL)
 634             && !IN_MULTICAST(ntohl(to->sin_addr.s_addr)))
 635                 errx(EX_USAGE,
 636                     "-I, -L, -T flags cannot be used with unicast destination");
 637
 638         if (datalen >= TIMEVAL_LEN)     /* can we time transfer */
 639                 timing = 1;
 640
 641         if (!(options & F_PINGFILLED))
 642                 for (i = TIMEVAL_LEN; i < datalen; ++i)
 643                         *datap++ = i;
 644
 645         ident = getpid() & 0xFFFF;
 646
 647         hold = 1;
 648         if (options & F_SO_DEBUG) {
 649                 (void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold,
 650                     sizeof(hold));
 651                 (void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold,
 652                     sizeof(hold));
 653         }
 654         if (options & F_SO_DONTROUTE)
 655                 (void)setsockopt(ssend, SOL_SOCKET, SO_DONTROUTE, (char *)&hold,
 656                     sizeof(hold));
 657 #ifdef IPSEC
 658 #ifdef IPSEC_POLICY_IPSEC
 659         if (options & F_POLICY) {
 660                 char *buf;
 661                 if (policy_in != NULL) {
 662                         buf = ipsec_set_policy(policy_in, strlen(policy_in));
 663                         if (buf == NULL)
 664                                 errx(EX_CONFIG, "%s", ipsec_strerror());
 665                         if (setsockopt(srecv, IPPROTO_IP, IP_IPSEC_POLICY,
 666                                         buf, ipsec_get_policylen(buf)) < 0)
 667                                 err(EX_CONFIG,
 668                                     "ipsec policy cannot be configured");
 669                         free(buf);
 670                 }
 671
 672                 if (policy_out != NULL) {
 673                         buf = ipsec_set_policy(policy_out, strlen(policy_out));
 674                         if (buf == NULL)
 675                                 errx(EX_CONFIG, "%s", ipsec_strerror());
 676                         if (setsockopt(ssend, IPPROTO_IP, IP_IPSEC_POLICY,
 677                                         buf, ipsec_get_policylen(buf)) < 0)
 678                                 err(EX_CONFIG,
 679                                     "ipsec policy cannot be configured");
 680                         free(buf);
 681                 }
 682         }
 683 #endif /*IPSEC_POLICY_IPSEC*/
 684 #endif /*IPSEC*/
 685
 686         if (options & F_HDRINCL) {
 687                 ip = (struct ip*)outpackhdr;
 688                 if (!(options & (F_TTL | F_MTTL))) {
 689                         mib[0] = CTL_NET;
 690                         mib[1] = PF_INET;
 691                         mib[2] = IPPROTO_IP;
 692                         mib[3] = IPCTL_DEFTTL;
 693                         sz = sizeof(ttl);
 694                         if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1)
 695                                 err(1, "sysctl(net.inet.ip.ttl)");
 696                 }
 697                 setsockopt(ssend, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold));
 698                 ip->ip_v = IPVERSION;
 699                 ip->ip_hl = sizeof(struct ip) >> 2;
 700                 ip->ip_tos = tos;
 701                 ip->ip_id = 0;
 702                 ip->ip_off = htons(df ? IP_DF : 0);
 703                 ip->ip_ttl = ttl;
 704                 ip->ip_p = IPPROTO_ICMP;
 705                 ip->ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY;
 706                 ip->ip_dst = to->sin_addr;
 707         }
 708
 709         if (options & F_NUMERIC)
 710                 cansandbox = true;
 711         else if (capdns != NULL)
 712                 cansandbox = true;
 713         else
 714                 cansandbox = false;
 715
 716         /*
 717          * Here we enter capability mode. Further down access to global
 718          * namespaces (e.g filesystem) is restricted (see capsicum(4)).
 719          * We must connect(2) our socket before this point.
 720          */
 721         if (cansandbox && cap_enter() < 0 && errno != ENOSYS)
 722                 err(1, "cap_enter");
 723
 724         cap_rights_init(&rights, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT);
 725         if (cap_rights_limit(srecv, &rights) < 0 && errno != ENOSYS)
 726                 err(1, "cap_rights_limit srecv");
 727
 728         cap_rights_init(&rights, CAP_SEND, CAP_SETSOCKOPT);
 729         if (cap_rights_limit(ssend, &rights) < 0 && errno != ENOSYS)
 730                 err(1, "cap_rights_limit ssend");
 731
 732         /* record route option */
 733         if (options & F_RROUTE) {
 734 #ifdef IP_OPTIONS
 735                 bzero(rspace, sizeof(rspace));
 736                 rspace[IPOPT_OPTVAL] = IPOPT_RR;
 737                 rspace[IPOPT_OLEN] = sizeof(rspace) - 1;
 738                 rspace[IPOPT_OFFSET] = IPOPT_MINOFF;
 739                 rspace[sizeof(rspace) - 1] = IPOPT_EOL;
 740                 if (setsockopt(ssend, IPPROTO_IP, IP_OPTIONS, rspace,
 741                     sizeof(rspace)) < 0)
 742                         err(EX_OSERR, "setsockopt IP_OPTIONS");
 743 #else
 744                 errx(EX_UNAVAILABLE,
 745                     "record route not available in this implementation");
 746 #endif /* IP_OPTIONS */
 747         }
 748
 749         if (options & F_TTL) {
 750                 if (setsockopt(ssend, IPPROTO_IP, IP_TTL, &ttl,
 751                     sizeof(ttl)) < 0) {
 752                         err(EX_OSERR, "setsockopt IP_TTL");
 753                 }
 754         }
 755         if (options & F_NOLOOP) {
 756                 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_LOOP, &loop,
 757                     sizeof(loop)) < 0) {
 758                         err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP");
 759                 }
 760         }
 761         if (options & F_MTTL) {
 762                 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_TTL, &mttl,
 763                     sizeof(mttl)) < 0) {
 764                         err(EX_OSERR, "setsockopt IP_MULTICAST_TTL");
 765                 }
 766         }
 767         if (options & F_MIF) {
 768                 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr,
 769                     sizeof(ifaddr)) < 0) {
 770                         err(EX_OSERR, "setsockopt IP_MULTICAST_IF");
 771                 }
 772         }
 773 #ifdef SO_TIMESTAMP
 774         { int on = 1;
 775         if (setsockopt(srecv, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)) < 0)
 776                 err(EX_OSERR, "setsockopt SO_TIMESTAMP");
 777         }
 778 #endif
 779         if (sweepmax) {
 780                 if (sweepmin > sweepmax)
 781                         errx(EX_USAGE, "Maximum packet size must be no less than the minimum packet size");
 782
 783                 if (datalen != DEFDATALEN)
 784                         errx(EX_USAGE, "Packet size and ping sweep are mutually exclusive");
 785
 786                 if (npackets > 0) {
 787                         snpackets = npackets;
 788                         npackets = 0;
 789                 } else
 790                         snpackets = 1;
 791                 datalen = sweepmin;
 792                 send_len = icmp_len + sweepmin;
 793         }
 794         if (options & F_SWEEP && !sweepmax)
 795                 errx(EX_USAGE, "Maximum sweep size must be specified");
 796
 797         /*
 798          * When pinging the broadcast address, you can get a lot of answers.
 799          * Doing something so evil is useful if you are trying to stress the
 800          * ethernet, or just want to fill the arp cache to get some stuff for
 801          * /etc/ethers.  But beware: RFC 1122 allows hosts to ignore broadcast
 802          * or multicast pings if they wish.
 803          */
 804
 805         /*
 806          * XXX receive buffer needs undetermined space for mbuf overhead
 807          * as well.
 808          */
 809         hold = IP_MAXPACKET + 128;
 810         (void)setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold,
 811             sizeof(hold));
 812         /* CAP_SETSOCKOPT removed */
 813         cap_rights_init(&rights, CAP_RECV, CAP_EVENT);
 814         if (cap_rights_limit(srecv, &rights) < 0 && errno != ENOSYS)
 815                 err(1, "cap_rights_limit srecv setsockopt");
 816         if (uid == 0)
 817                 (void)setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, (char *)&hold,
 818                     sizeof(hold));
 819         /* CAP_SETSOCKOPT removed */
 820         cap_rights_init(&rights, CAP_SEND);
 821         if (cap_rights_limit(ssend, &rights) < 0 && errno != ENOSYS)
 822                 err(1, "cap_rights_limit ssend setsockopt");
 823
 824         if (to->sin_family == AF_INET) {
 825                 (void)printf("PING %s (%s)", hostname,
 826                     inet_ntoa(to->sin_addr));
 827                 if (source)
 828                         (void)printf(" from %s", shostname);
 829                 if (sweepmax)
 830                         (void)printf(": (%d ... %d) data bytes\n",
 831                             sweepmin, sweepmax);
 832                 else
 833                         (void)printf(": %d data bytes\n", datalen);
 834
 835         } else {
 836                 if (sweepmax)
 837                         (void)printf("PING %s: (%d ... %d) data bytes\n",
 838                             hostname, sweepmin, sweepmax);
 839                 else
 840                         (void)printf("PING %s: %d data bytes\n", hostname, datalen);
 841         }
 842
 843         /*
 844          * Use sigaction() instead of signal() to get unambiguous semantics,
 845          * in particular with SA_RESTART not set.
 846          */
 847
 848         sigemptyset(&si_sa.sa_mask);
 849         si_sa.sa_flags = 0;
 850
 851         si_sa.sa_handler = stopit;
 852         if (sigaction(SIGINT, &si_sa, 0) == -1) {
 853                 err(EX_OSERR, "sigaction SIGINT");
 854         }
 855
 856         si_sa.sa_handler = status;
 857         if (sigaction(SIGINFO, &si_sa, 0) == -1) {
 858                 err(EX_OSERR, "sigaction");
 859         }
 860
 861         if (alarmtimeout > 0) {
 862                 si_sa.sa_handler = stopit;
 863                 if (sigaction(SIGALRM, &si_sa, 0) == -1)
 864                         err(EX_OSERR, "sigaction SIGALRM");
 865         }
 866
 867         bzero(&msg, sizeof(msg));
 868         msg.msg_name = (caddr_t)&from;
 869         msg.msg_iov = &iov;
 870         msg.msg_iovlen = 1;
 871 #ifdef SO_TIMESTAMP
 872         msg.msg_control = (caddr_t)ctrl;
 873 #endif
 874         iov.iov_base = packet;
 875         iov.iov_len = IP_MAXPACKET;
 876
 877         if (preload == 0)
 878                 pinger();               /* send the first ping */
 879         else {
 880                 if (npackets != 0 && preload > npackets)
 881                         preload = npackets;
 882                 while (preload--)       /* fire off them quickies */
 883                         pinger();
 884         }
 885         (void)gettimeofday(&last, NULL);
 886
 887         if (options & F_FLOOD) {
 888                 intvl.tv_sec = 0;
 889                 intvl.tv_usec = 10000;
 890         } else {
 891                 intvl.tv_sec = interval / 1000;
 892                 intvl.tv_usec = interval % 1000 * 1000;
 893         }
 894
 895         almost_done = 0;
 896         while (!finish_up) {
 897                 struct timeval now, timeout;
 898                 fd_set rfds;
 899                 int cc, n;
 900
 901                 check_status();
 902                 if ((unsigned)srecv >= FD_SETSIZE)
 903                         errx(EX_OSERR, "descriptor too large");
 904                 FD_ZERO(&rfds);
 905                 FD_SET(srecv, &rfds);
 906                 (void)gettimeofday(&now, NULL);
 907                 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec;
 908                 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec;
 909                 while (timeout.tv_usec < 0) {
 910                         timeout.tv_usec += 1000000;
 911                         timeout.tv_sec--;
 912                 }
 913                 while (timeout.tv_usec >= 1000000) {
 914                         timeout.tv_usec -= 1000000;
 915                         timeout.tv_sec++;
 916                 }
 917                 if (timeout.tv_sec < 0)
 918                         timerclear(&timeout);
 919                 n = select(srecv + 1, &rfds, NULL, NULL, &timeout);
 920                 if (n < 0)
 921                         continue;       /* Must be EINTR. */
 922                 if (n == 1) {
 923                         struct timeval *tv = NULL;
 924 #ifdef SO_TIMESTAMP
 925                         struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl;
 926
 927                         msg.msg_controllen = sizeof(ctrl);
 928 #endif
 929                         msg.msg_namelen = sizeof(from);
 930                         if ((cc = recvmsg(srecv, &msg, 0)) < 0) {
 931                                 if (errno == EINTR)
 932                                         continue;
 933                                 warn("recvmsg");
 934                                 continue;
 935                         }
 936 #ifdef SO_TIMESTAMP
 937                         if (cmsg->cmsg_level == SOL_SOCKET &&
 938                             cmsg->cmsg_type == SCM_TIMESTAMP &&
 939                             cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) {
 940                                 /* Copy to avoid alignment problems: */
 941                                 memcpy(&now, CMSG_DATA(cmsg), sizeof(now));
 942                                 tv = &now;
 943                         }
 944 #endif
 945                         if (tv == NULL) {
 946                                 (void)gettimeofday(&now, NULL);
 947                                 tv = &now;
 948                         }
 949                         pr_pack((char *)packet, cc, &from, tv);
 950                         if ((options & F_ONCE && nreceived) ||
 951                             (npackets && nreceived >= npackets))
 952                                 break;
 953                 }
 954                 if (n == 0 || options & F_FLOOD) {
 955                         if (sweepmax && sntransmitted == snpackets) {
 956                                 for (i = 0; i < sweepincr ; ++i)
 957                                         *datap++ = i;
 958                                 datalen += sweepincr;
 959                                 if (datalen > sweepmax)
 960                                         break;
 961                                 send_len = icmp_len + datalen;
 962                                 sntransmitted = 0;
 963                         }
 964                         if (!npackets || ntransmitted < npackets)
 965                                 pinger();
 966                         else {
 967                                 if (almost_done)
 968                                         break;
 969                                 almost_done = 1;
 970                                 intvl.tv_usec = 0;
 971                                 if (nreceived) {
 972                                         intvl.tv_sec = 2 * tmax / 1000;
 973                                         if (!intvl.tv_sec)
 974                                                 intvl.tv_sec = 1;
 975                                 } else {
 976                                         intvl.tv_sec = waittime / 1000;
 977                                         intvl.tv_usec = waittime % 1000 * 1000;
 978                                 }
 979                         }
 980                         (void)gettimeofday(&last, NULL);
 981                         if (ntransmitted - nreceived - 1 > nmissedmax) {
 982                                 nmissedmax = ntransmitted - nreceived - 1;
 983                                 if (options & F_MISSED)
 984                                         (void)write(STDOUT_FILENO, &BBELL, 1);
 985                         }
 986                 }
 987         }
 988         finish();
 989         /* NOTREACHED */
 990         exit(0);        /* Make the compiler happy */
 991 }
 992
 993 /*
 994  * stopit --
 995  *      Set the global bit that causes the main loop to quit.
 996  * Do NOT call finish() from here, since finish() does far too much
 997  * to be called from a signal handler.
 998  */
 999 void
1000 stopit(int sig __unused)
1001 {
1002
1003         /*
1004          * When doing reverse DNS lookups, the finish_up flag might not
1005          * be noticed for a while.  Just exit if we get a second SIGINT.
1006          */
1007         if (!(options & F_NUMERIC) && finish_up)
1008                 _exit(nreceived ? 0 : 2);
1009         finish_up = 1;
1010 }
1011
1012 /*
1013  * pinger --
1014  *      Compose and transmit an ICMP ECHO REQUEST packet.  The IP packet
1015  * will be added on by the kernel.  The ID field is our UNIX process ID,
1016  * and the sequence number is an ascending integer.  The first TIMEVAL_LEN
1017  * bytes of the data portion are used to hold a UNIX "timeval" struct in
1018  * host byte-order, to compute the round-trip time.
1019  */
1020 static void
1021 pinger(void)
1022 {
1023         struct timeval now;
1024         struct tv32 tv32;
1025         struct ip *ip;
1026         struct icmp *icp;
1027         int cc, i;
1028         u_char *packet;
1029
1030         packet = outpack;
1031         icp = (struct icmp *)outpack;
1032         icp->icmp_type = icmp_type;
1033         icp->icmp_code = 0;
1034         icp->icmp_cksum = 0;
1035         icp->icmp_seq = htons(ntransmitted);
1036         icp->icmp_id = ident;                   /* ID */
1037
1038         CLR(ntransmitted % mx_dup_ck);
1039
1040         if ((options & F_TIME) || timing) {
1041                 (void)gettimeofday(&now, NULL);
1042
1043                 tv32.tv32_sec = htonl(now.tv_sec);
1044                 tv32.tv32_usec = htonl(now.tv_usec);
1045                 if (options & F_TIME)
1046                         icp->icmp_otime = htonl((now.tv_sec % (24*60*60))
1047                                 * 1000 + now.tv_usec / 1000);
1048                 if (timing)
1049                         bcopy((void *)&tv32,
1050                             (void *)&outpack[ICMP_MINLEN + phdr_len],
1051                             sizeof(tv32));
1052         }
1053
1054         cc = ICMP_MINLEN + phdr_len + datalen;
1055
1056         /* compute ICMP checksum here */
1057         icp->icmp_cksum = in_cksum((u_short *)icp, cc);
1058
1059         if (options & F_HDRINCL) {
1060                 cc += sizeof(struct ip);
1061                 ip = (struct ip *)outpackhdr;
1062                 ip->ip_len = htons(cc);
1063                 ip->ip_sum = in_cksum((u_short *)outpackhdr, cc);
1064                 packet = outpackhdr;
1065         }
1066         i = send(ssend, (char *)packet, cc, 0);
1067         if (i < 0 || i != cc)  {
1068                 if (i < 0) {
1069                         if (options & F_FLOOD && errno == ENOBUFS) {
1070                                 usleep(FLOOD_BACKOFF);
1071                                 return;
1072                         }
1073                         warn("sendto");
1074                 } else {
1075                         warn("%s: partial write: %d of %d bytes",
1076                              hostname, i, cc);
1077                 }
1078         }
1079         ntransmitted++;
1080         sntransmitted++;
1081         if (!(options & F_QUIET) && options & F_FLOOD)
1082                 (void)write(STDOUT_FILENO, &DOT, 1);
1083 }
1084
1085 /*
1086  * pr_pack --
1087  *      Print out the packet, if it came from us.  This logic is necessary
1088  * because ALL readers of the ICMP socket get a copy of ALL ICMP packets
1089  * which arrive ('tis only fair).  This permits multiple copies of this
1090  * program to be run without having intermingled output (or statistics!).
1091  */
1092 static void
1093 pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timeval *tv)
1094 {
1095         struct in_addr ina;
1096         u_char *cp, *dp;
1097         struct icmp *icp;
1098         struct ip *ip;
1099         const void *tp;
1100         double triptime;
1101         int dupflag, hlen, i, j, recv_len, seq;
1102         static int old_rrlen;
1103         static char old_rr[MAX_IPOPTLEN];
1104
1105         /* Check the IP header */
1106         ip = (struct ip *)buf;
1107         hlen = ip->ip_hl << 2;
1108         recv_len = cc;
1109         if (cc < hlen + ICMP_MINLEN) {
1110                 if (options & F_VERBOSE)
1111                         warn("packet too short (%d bytes) from %s", cc,
1112                              inet_ntoa(from->sin_addr));
1113                 return;
1114         }
1115
1116         /* Now the ICMP part */
1117         cc -= hlen;
1118         icp = (struct icmp *)(buf + hlen);
1119         if (icp->icmp_type == icmp_type_rsp) {
1120                 if (icp->icmp_id != ident)
1121                         return;                 /* 'Twas not our ECHO */
1122                 ++nreceived;
1123                 triptime = 0.0;
1124                 if (timing) {
1125                         struct timeval tv1;
1126                         struct tv32 tv32;
1127 #ifndef icmp_data
1128                         tp = &icp->icmp_ip;
1129 #else
1130                         tp = icp->icmp_data;
1131 #endif
1132                         tp = (const char *)tp + phdr_len;
1133
1134                         if ((size_t)(cc - ICMP_MINLEN - phdr_len) >=
1135                             sizeof(tv1)) {
1136                                 /* Copy to avoid alignment problems: */
1137                                 memcpy(&tv32, tp, sizeof(tv32));
1138                                 tv1.tv_sec = ntohl(tv32.tv32_sec);
1139                                 tv1.tv_usec = ntohl(tv32.tv32_usec);
1140                                 tvsub(tv, &tv1);
1141                                 triptime = ((double)tv->tv_sec) * 1000.0 +
1142                                     ((double)tv->tv_usec) / 1000.0;
1143                                 tsum += triptime;
1144                                 tsumsq += triptime * triptime;
1145                                 if (triptime < tmin)
1146                                         tmin = triptime;
1147                                 if (triptime > tmax)
1148                                         tmax = triptime;
1149                         } else
1150                                 timing = 0;
1151                 }
1152
1153                 seq = ntohs(icp->icmp_seq);
1154
1155                 if (TST(seq % mx_dup_ck)) {
1156                         ++nrepeats;
1157                         --nreceived;
1158                         dupflag = 1;
1159                 } else {
1160                         SET(seq % mx_dup_ck);
1161                         dupflag = 0;
1162                 }
1163
1164                 if (options & F_QUIET)
1165                         return;
1166
1167                 if (options & F_WAITTIME && triptime > waittime) {
1168                         ++nrcvtimeout;
1169                         return;
1170                 }
1171
1172                 if (options & F_FLOOD)
1173                         (void)write(STDOUT_FILENO, &BSPACE, 1);
1174                 else {
1175                         (void)printf("%d bytes from %s: icmp_seq=%u", cc,
1176                            inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr),
1177                            seq);
1178                         (void)printf(" ttl=%d", ip->ip_ttl);
1179                         if (timing)
1180                                 (void)printf(" time=%.3f ms", triptime);
1181                         if (dupflag)
1182                                 (void)printf(" (DUP!)");
1183                         if (options & F_AUDIBLE)
1184                                 (void)write(STDOUT_FILENO, &BBELL, 1);
1185                         if (options & F_MASK) {
1186                                 /* Just prentend this cast isn't ugly */
1187                                 (void)printf(" mask=%s",
1188                                         inet_ntoa(*(struct in_addr *)&(icp->icmp_mask)));
1189                         }
1190                         if (options & F_TIME) {
1191                                 (void)printf(" tso=%s", pr_ntime(icp->icmp_otime));
1192                                 (void)printf(" tsr=%s", pr_ntime(icp->icmp_rtime));
1193                                 (void)printf(" tst=%s", pr_ntime(icp->icmp_ttime));
1194                         }
1195                         if (recv_len != send_len) {
1196                                 (void)printf(
1197                                      "\nwrong total length %d instead of %d",
1198                                      recv_len, send_len);
1199                         }
1200                         /* check the data */
1201                         cp = (u_char*)&icp->icmp_data[phdr_len];
1202                         dp = &outpack[ICMP_MINLEN + phdr_len];
1203                         cc -= ICMP_MINLEN + phdr_len;
1204                         i = 0;
1205                         if (timing) {   /* don't check variable timestamp */
1206                                 cp += TIMEVAL_LEN;
1207                                 dp += TIMEVAL_LEN;
1208                                 cc -= TIMEVAL_LEN;
1209                                 i += TIMEVAL_LEN;
1210                         }
1211                         for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) {
1212                                 if (*cp != *dp) {
1213         (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x",
1214             i, *dp, *cp);
1215                                         (void)printf("\ncp:");
1216                                         cp = (u_char*)&icp->icmp_data[0];
1217                                         for (i = 0; i < datalen; ++i, ++cp) {
1218                                                 if ((i % 16) == 8)
1219                                                         (void)printf("\n\t");
1220                                                 (void)printf("%2x ", *cp);
1221                                         }
1222                                         (void)printf("\ndp:");
1223                                         cp = &outpack[ICMP_MINLEN];
1224                                         for (i = 0; i < datalen; ++i, ++cp) {
1225                                                 if ((i % 16) == 8)
1226                                                         (void)printf("\n\t");
1227                                                 (void)printf("%2x ", *cp);
1228                                         }
1229                                         break;
1230                                 }
1231                         }
1232                 }
1233         } else {
1234                 /*
1235                  * We've got something other than an ECHOREPLY.
1236                  * See if it's a reply to something that we sent.
1237                  * We can compare IP destination, protocol,
1238                  * and ICMP type and ID.
1239                  *
1240                  * Only print all the error messages if we are running
1241                  * as root to avoid leaking information not normally
1242                  * available to those not running as root.
1243                  */
1244 #ifndef icmp_data
1245                 struct ip *oip = &icp->icmp_ip;
1246 #else
1247                 struct ip *oip = (struct ip *)icp->icmp_data;
1248 #endif
1249                 struct icmp *oicmp = (struct icmp *)(oip + 1);
1250
1251                 if (((options & F_VERBOSE) && uid == 0) ||
1252                     (!(options & F_QUIET2) &&
1253                      (oip->ip_dst.s_addr == whereto.sin_addr.s_addr) &&
1254                      (oip->ip_p == IPPROTO_ICMP) &&
1255                      (oicmp->icmp_type == ICMP_ECHO) &&
1256                      (oicmp->icmp_id == ident))) {
1257                     (void)printf("%d bytes from %s: ", cc,
1258                         pr_addr(from->sin_addr));
1259                     pr_icmph(icp);
1260                 } else
1261                     return;
1262         }
1263
1264         /* Display any IP options */
1265         cp = (u_char *)buf + sizeof(struct ip);
1266
1267         for (; hlen > (int)sizeof(struct ip); --hlen, ++cp)
1268                 switch (*cp) {
1269                 case IPOPT_EOL:
1270                         hlen = 0;
1271                         break;
1272                 case IPOPT_LSRR:
1273                 case IPOPT_SSRR:
1274                         (void)printf(*cp == IPOPT_LSRR ?
1275                             "\nLSRR: " : "\nSSRR: ");
1276                         j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1;
1277                         hlen -= 2;
1278                         cp += 2;
1279                         if (j >= INADDR_LEN &&
1280                             j <= hlen - (int)sizeof(struct ip)) {
1281                                 for (;;) {
1282                                         bcopy(++cp, &ina.s_addr, INADDR_LEN);
1283                                         if (ina.s_addr == 0)
1284                                                 (void)printf("\t0.0.0.0");
1285                                         else
1286                                                 (void)printf("\t%s",
1287                                                      pr_addr(ina));
1288                                         hlen -= INADDR_LEN;
1289                                         cp += INADDR_LEN - 1;
1290                                         j -= INADDR_LEN;
1291                                         if (j < INADDR_LEN)
1292                                                 break;
1293                                         (void)putchar('\n');
1294                                 }
1295                         } else
1296                                 (void)printf("\t(truncated route)\n");
1297                         break;
1298                 case IPOPT_RR:
1299                         j = cp[IPOPT_OLEN];             /* get length */
1300                         i = cp[IPOPT_OFFSET];           /* and pointer */
1301                         hlen -= 2;
1302                         cp += 2;
1303                         if (i > j)
1304                                 i = j;
1305                         i = i - IPOPT_MINOFF + 1;
1306                         if (i < 0 || i > (hlen - (int)sizeof(struct ip))) {
1307                                 old_rrlen = 0;
1308                                 continue;
1309                         }
1310                         if (i == old_rrlen
1311                             && !bcmp((char *)cp, old_rr, i)
1312                             && !(options & F_FLOOD)) {
1313                                 (void)printf("\t(same route)");
1314                                 hlen -= i;
1315                                 cp += i;
1316                                 break;
1317                         }
1318                         old_rrlen = i;
1319                         bcopy((char *)cp, old_rr, i);
1320                         (void)printf("\nRR: ");
1321                         if (i >= INADDR_LEN &&
1322                             i <= hlen - (int)sizeof(struct ip)) {
1323                                 for (;;) {
1324                                         bcopy(++cp, &ina.s_addr, INADDR_LEN);
1325                                         if (ina.s_addr == 0)
1326                                                 (void)printf("\t0.0.0.0");
1327                                         else
1328                                                 (void)printf("\t%s",
1329                                                      pr_addr(ina));
1330                                         hlen -= INADDR_LEN;
1331                                         cp += INADDR_LEN - 1;
1332                                         i -= INADDR_LEN;
1333                                         if (i < INADDR_LEN)
1334                                                 break;
1335                                         (void)putchar('\n');
1336                                 }
1337                         } else
1338                                 (void)printf("\t(truncated route)");
1339                         break;
1340                 case IPOPT_NOP:
1341                         (void)printf("\nNOP");
1342                         break;
1343                 default:
1344                         (void)printf("\nunknown option %x", *cp);
1345                         break;
1346                 }
1347         if (!(options & F_FLOOD)) {
1348                 (void)putchar('\n');
1349                 (void)fflush(stdout);
1350         }
1351 }
1352
1353 /*
1354  * in_cksum --
1355  *      Checksum routine for Internet Protocol family headers (C Version)
1356  */
1357 u_short
1358 in_cksum(u_short *addr, int len)
1359 {
1360         int nleft, sum;
1361         u_short *w;
1362         union {
1363                 u_short us;
1364                 u_char  uc[2];
1365         } last;
1366         u_short answer;
1367
1368         nleft = len;
1369         sum = 0;
1370         w = addr;
1371
1372         /*
1373          * Our algorithm is simple, using a 32 bit accumulator (sum), we add
1374          * sequential 16 bit words to it, and at the end, fold back all the
1375          * carry bits from the top 16 bits into the lower 16 bits.
1376          */
1377         while (nleft > 1)  {
1378                 sum += *w++;
1379                 nleft -= 2;
1380         }
1381
1382         /* mop up an odd byte, if necessary */
1383         if (nleft == 1) {
1384                 last.uc[0] = *(u_char *)w;
1385                 last.uc[1] = 0;
1386                 sum += last.us;
1387         }
1388
1389         /* add back carry outs from top 16 bits to low 16 bits */
1390         sum = (sum >> 16) + (sum & 0xffff);     /* add hi 16 to low 16 */
1391         sum += (sum >> 16);                     /* add carry */
1392         answer = ~sum;                          /* truncate to 16 bits */
1393         return(answer);
1394 }
1395
1396 /*
1397  * tvsub --
1398  *      Subtract 2 timeval structs:  out = out - in.  Out is assumed to
1399  * be >= in.
1400  */
1401 static void
1402 tvsub(struct timeval *out, const struct timeval *in)
1403 {
1404
1405         if ((out->tv_usec -= in->tv_usec) < 0) {
1406                 --out->tv_sec;
1407                 out->tv_usec += 1000000;
1408         }
1409         out->tv_sec -= in->tv_sec;
1410 }
1411
1412 /*
1413  * status --
1414  *      Print out statistics when SIGINFO is received.
1415  */
1416
1417 static void
1418 status(int sig __unused)
1419 {
1420
1421         siginfo_p = 1;
1422 }
1423
1424 static void
1425 check_status(void)
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(void)
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(struct icmp *icp)
1505 {
1506
1507         switch(icp->icmp_type) {
1508         case ICMP_ECHOREPLY:
1509                 (void)printf("Echo Reply\n");
1510                 /* XXX ID + Seq + Data */
1511                 break;
1512         case ICMP_UNREACH:
1513                 switch(icp->icmp_code) {
1514                 case ICMP_UNREACH_NET:
1515                         (void)printf("Destination Net Unreachable\n");
1516                         break;
1517                 case ICMP_UNREACH_HOST:
1518                         (void)printf("Destination Host Unreachable\n");
1519                         break;
1520                 case ICMP_UNREACH_PROTOCOL:
1521                         (void)printf("Destination Protocol Unreachable\n");
1522                         break;
1523                 case ICMP_UNREACH_PORT:
1524                         (void)printf("Destination Port Unreachable\n");
1525                         break;
1526                 case ICMP_UNREACH_NEEDFRAG:
1527                         (void)printf("frag needed and DF set (MTU %d)\n",
1528                                         ntohs(icp->icmp_nextmtu));
1529                         break;
1530                 case ICMP_UNREACH_SRCFAIL:
1531                         (void)printf("Source Route Failed\n");
1532                         break;
1533                 case ICMP_UNREACH_FILTER_PROHIB:
1534                         (void)printf("Communication prohibited by filter\n");
1535                         break;
1536                 default:
1537                         (void)printf("Dest Unreachable, Bad Code: %d\n",
1538                             icp->icmp_code);
1539                         break;
1540                 }
1541                 /* Print returned IP header information */
1542 #ifndef icmp_data
1543                 pr_retip(&icp->icmp_ip);
1544 #else
1545                 pr_retip((struct ip *)icp->icmp_data);
1546 #endif
1547                 break;
1548         case ICMP_SOURCEQUENCH:
1549                 (void)printf("Source Quench\n");
1550 #ifndef icmp_data
1551                 pr_retip(&icp->icmp_ip);
1552 #else
1553                 pr_retip((struct ip *)icp->icmp_data);
1554 #endif
1555                 break;
1556         case ICMP_REDIRECT:
1557                 switch(icp->icmp_code) {
1558                 case ICMP_REDIRECT_NET:
1559                         (void)printf("Redirect Network");
1560                         break;
1561                 case ICMP_REDIRECT_HOST:
1562                         (void)printf("Redirect Host");
1563                         break;
1564                 case ICMP_REDIRECT_TOSNET:
1565                         (void)printf("Redirect Type of Service and Network");
1566                         break;
1567                 case ICMP_REDIRECT_TOSHOST:
1568                         (void)printf("Redirect Type of Service and Host");
1569                         break;
1570                 default:
1571                         (void)printf("Redirect, Bad Code: %d", icp->icmp_code);
1572                         break;
1573                 }
1574                 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr));
1575 #ifndef icmp_data
1576                 pr_retip(&icp->icmp_ip);
1577 #else
1578                 pr_retip((struct ip *)icp->icmp_data);
1579 #endif
1580                 break;
1581         case ICMP_ECHO:
1582                 (void)printf("Echo Request\n");
1583                 /* XXX ID + Seq + Data */
1584                 break;
1585         case ICMP_TIMXCEED:
1586                 switch(icp->icmp_code) {
1587                 case ICMP_TIMXCEED_INTRANS:
1588                         (void)printf("Time to live exceeded\n");
1589                         break;
1590                 case ICMP_TIMXCEED_REASS:
1591                         (void)printf("Frag reassembly time exceeded\n");
1592                         break;
1593                 default:
1594                         (void)printf("Time exceeded, Bad Code: %d\n",
1595                             icp->icmp_code);
1596                         break;
1597                 }
1598 #ifndef icmp_data
1599                 pr_retip(&icp->icmp_ip);
1600 #else
1601                 pr_retip((struct ip *)icp->icmp_data);
1602 #endif
1603                 break;
1604         case ICMP_PARAMPROB:
1605                 (void)printf("Parameter problem: pointer = 0x%02x\n",
1606                     icp->icmp_hun.ih_pptr);
1607 #ifndef icmp_data
1608                 pr_retip(&icp->icmp_ip);
1609 #else
1610                 pr_retip((struct ip *)icp->icmp_data);
1611 #endif
1612                 break;
1613         case ICMP_TSTAMP:
1614                 (void)printf("Timestamp\n");
1615                 /* XXX ID + Seq + 3 timestamps */
1616                 break;
1617         case ICMP_TSTAMPREPLY:
1618                 (void)printf("Timestamp Reply\n");
1619                 /* XXX ID + Seq + 3 timestamps */
1620                 break;
1621         case ICMP_IREQ:
1622                 (void)printf("Information Request\n");
1623                 /* XXX ID + Seq */
1624                 break;
1625         case ICMP_IREQREPLY:
1626                 (void)printf("Information Reply\n");
1627                 /* XXX ID + Seq */
1628                 break;
1629         case ICMP_MASKREQ:
1630                 (void)printf("Address Mask Request\n");
1631                 break;
1632         case ICMP_MASKREPLY:
1633                 (void)printf("Address Mask Reply\n");
1634                 break;
1635         case ICMP_ROUTERADVERT:
1636                 (void)printf("Router Advertisement\n");
1637                 break;
1638         case ICMP_ROUTERSOLICIT:
1639                 (void)printf("Router Solicitation\n");
1640                 break;
1641         default:
1642                 (void)printf("Bad ICMP type: %d\n", icp->icmp_type);
1643         }
1644 }
1645
1646 /*
1647  * pr_iph --
1648  *      Print an IP header with options.
1649  */
1650 static void
1651 pr_iph(struct ip *ip)
1652 {
1653         struct in_addr ina;
1654         u_char *cp;
1655         int hlen;
1656
1657         hlen = ip->ip_hl << 2;
1658         cp = (u_char *)ip + 20;         /* point to options */
1659
1660         (void)printf("Vr HL TOS  Len   ID Flg  off TTL Pro  cks      Src      Dst\n");
1661         (void)printf(" %1x  %1x  %02x %04x %04x",
1662             ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len),
1663             ntohs(ip->ip_id));
1664         (void)printf("   %1lx %04lx",
1665             (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13,
1666             (u_long) ntohl(ip->ip_off) & 0x1fff);
1667         (void)printf("  %02x  %02x %04x", ip->ip_ttl, ip->ip_p,
1668                                                             ntohs(ip->ip_sum));
1669         memcpy(&ina, &ip->ip_src.s_addr, sizeof ina);
1670         (void)printf(" %s ", inet_ntoa(ina));
1671         memcpy(&ina, &ip->ip_dst.s_addr, sizeof ina);
1672         (void)printf(" %s ", inet_ntoa(ina));
1673         /* dump any option bytes */
1674         while (hlen-- > 20) {
1675                 (void)printf("%02x", *cp++);
1676         }
1677         (void)putchar('\n');
1678 }
1679
1680 /*
1681  * pr_addr --
1682  *      Return an ascii host address as a dotted quad and optionally with
1683  * a hostname.
1684  */
1685 static char *
1686 pr_addr(struct in_addr ina)
1687 {
1688         struct hostent *hp;
1689         static char buf[16 + 3 + MAXHOSTNAMELEN];
1690
1691         if (options & F_NUMERIC)
1692                 return inet_ntoa(ina);
1693
1694         if (capdns != NULL)
1695                 hp = cap_gethostbyaddr(capdns, (char *)&ina, 4, AF_INET);
1696         else
1697                 hp = gethostbyaddr((char *)&ina, 4, AF_INET);
1698
1699         if (hp == NULL)
1700                 return inet_ntoa(ina);
1701
1702         (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name,
1703             inet_ntoa(ina));
1704         return(buf);
1705 }
1706
1707 /*
1708  * pr_retip --
1709  *      Dump some info on a returned (via ICMP) IP packet.
1710  */
1711 static void
1712 pr_retip(struct ip *ip)
1713 {
1714         u_char *cp;
1715         int hlen;
1716
1717         pr_iph(ip);
1718         hlen = ip->ip_hl << 2;
1719         cp = (u_char *)ip + hlen;
1720
1721         if (ip->ip_p == 6)
1722                 (void)printf("TCP: from port %u, to port %u (decimal)\n",
1723                     (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
1724         else if (ip->ip_p == 17)
1725                 (void)printf("UDP: from port %u, to port %u (decimal)\n",
1726                         (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3)));
1727 }
1728
1729 static char *
1730 pr_ntime(n_time timestamp)
1731 {
1732         static char buf[10];
1733         int hour, min, sec;
1734
1735         sec = ntohl(timestamp) / 1000;
1736         hour = sec / 60 / 60;
1737         min = (sec % (60 * 60)) / 60;
1738         sec = (sec % (60 * 60)) % 60;
1739
1740         (void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec);
1741
1742         return (buf);
1743 }
1744
1745 static void
1746 fill(char *bp, char *patp)
1747 {
1748         char *cp;
1749         int pat[16];
1750         u_int ii, jj, kk;
1751
1752         for (cp = patp; *cp; cp++) {
1753                 if (!isxdigit(*cp))
1754                         errx(EX_USAGE,
1755                             "patterns must be specified as hex digits");
1756
1757         }
1758         ii = sscanf(patp,
1759             "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x",
1760             &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6],
1761             &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12],
1762             &pat[13], &pat[14], &pat[15]);
1763
1764         if (ii > 0)
1765                 for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii)
1766                         for (jj = 0; jj < ii; ++jj)
1767                                 bp[jj + kk] = pat[jj];
1768         if (!(options & F_QUIET)) {
1769                 (void)printf("PATTERN: 0x");
1770                 for (jj = 0; jj < ii; ++jj)
1771                         (void)printf("%02x", bp[jj] & 0xFF);
1772                 (void)printf("\n");
1773         }
1774 }
1775
1776 static cap_channel_t *
1777 capdns_setup(void)
1778 {
1779         cap_channel_t *capcas, *capdnsloc;
1780         const char *types[2];
1781         int families[1];
1782
1783         capcas = cap_init();
1784         if (capcas == NULL)
1785                 err(1, "unable to create casper process");
1786         capdnsloc = cap_service_open(capcas, "system.dns");
1787         /* Casper capability no longer needed. */
1788         cap_close(capcas);
1789         if (capdnsloc == NULL)
1790                 err(1, "unable to open system.dns service");
1791         types[0] = "NAME";
1792         types[1] = "ADDR";
1793         if (cap_dns_type_limit(capdnsloc, types, 2) < 0)
1794                 err(1, "unable to limit access to system.dns service");
1795         families[0] = AF_INET;
1796         if (cap_dns_family_limit(capdnsloc, families, 1) < 0)
1797                 err(1, "unable to limit access to system.dns service");
1798
1799         return (capdnsloc);
1800 }
1801
1802 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC)
1803 #define SECOPT          " [-P policy]"
1804 #else
1805 #define SECOPT          ""
1806 #endif
1807 static void
1808 usage(void)
1809 {
1810
1811         (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
1812 "usage: ping [-AaDdfnoQqRrv] [-c count] [-G sweepmaxsize] [-g sweepminsize]",
1813 "            [-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]",
1814 "           " SECOPT " [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]",
1815 "            [-W waittime] [-z tos] host",
1816 "       ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]",
1817 "            [-M mask | time] [-m ttl]" SECOPT " [-p pattern] [-S src_addr]",
1818 "            [-s packetsize] [-T ttl] [-t timeout] [-W waittime]",
1819 "            [-z tos] mcast-group");
1820         exit(EX_USAGE);
1821 }