1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Muuss. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #if 0 36 #ifndef lint 37 static const char copyright[] = 38 "@(#) Copyright (c) 1989, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93"; 44 #endif /* not lint */ 45 #endif 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 /* 50 * P I N G . C 51 * 52 * Using the Internet Control Message Protocol (ICMP) "ECHO" facility, 53 * measure round-trip-delays and packet loss across network paths. 54 * 55 * Author - 56 * Mike Muuss 57 * U. S. Army Ballistic Research Laboratory 58 * December, 1983 59 * 60 * Status - 61 * Public Domain. Distribution Unlimited. 62 * Bugs - 63 * More statistics could always be gathered. 64 * This program has to run SUID to ROOT to access the ICMP socket. 65 */ 66 67 #include <sys/param.h> /* NB: we rely on this for <sys/types.h> */ 68 #include <sys/capsicum.h> 69 #include <sys/socket.h> 70 #include <sys/sysctl.h> 71 #include <sys/time.h> 72 #include <sys/uio.h> 73 74 #include <netinet/in.h> 75 #include <netinet/in_systm.h> 76 #include <netinet/ip.h> 77 #include <netinet/ip_icmp.h> 78 #include <netinet/ip_var.h> 79 #include <arpa/inet.h> 80 81 #include <libcasper.h> 82 #include <casper/cap_dns.h> 83 84 #ifdef IPSEC 85 #include <netipsec/ipsec.h> 86 #endif /*IPSEC*/ 87 88 #include <capsicum_helpers.h> 89 #include <ctype.h> 90 #include <err.h> 91 #include <errno.h> 92 #include <math.h> 93 #include <netdb.h> 94 #include <signal.h> 95 #include <stdio.h> 96 #include <stdlib.h> 97 #include <string.h> 98 #include <sysexits.h> 99 #include <time.h> 100 #include <unistd.h> 101 102 #define INADDR_LEN ((int)sizeof(in_addr_t)) 103 #define TIMEVAL_LEN ((int)sizeof(struct tv32)) 104 #define MASK_LEN (ICMP_MASKLEN - ICMP_MINLEN) 105 #define TS_LEN (ICMP_TSLEN - ICMP_MINLEN) 106 #define DEFDATALEN 56 /* default data length */ 107 #define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */ 108 /* runs out of buffer space */ 109 #define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN) 110 #define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN) 111 #define MAXWAIT 10000 /* max ms to wait for response */ 112 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */ 113 #define MAXTOS 255 114 115 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 116 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 117 #define SET(bit) (A(bit) |= B(bit)) 118 #define CLR(bit) (A(bit) &= (~B(bit))) 119 #define TST(bit) (A(bit) & B(bit)) 120 121 struct tv32 { 122 int32_t tv32_sec; 123 int32_t tv32_nsec; 124 }; 125 126 /* various options */ 127 static int options; 128 #define F_FLOOD 0x0001 129 #define F_INTERVAL 0x0002 130 #define F_NUMERIC 0x0004 131 #define F_PINGFILLED 0x0008 132 #define F_QUIET 0x0010 133 #define F_RROUTE 0x0020 134 #define F_SO_DEBUG 0x0040 135 #define F_SO_DONTROUTE 0x0080 136 #define F_VERBOSE 0x0100 137 #define F_QUIET2 0x0200 138 #define F_NOLOOP 0x0400 139 #define F_MTTL 0x0800 140 #define F_MIF 0x1000 141 #define F_AUDIBLE 0x2000 142 #ifdef IPSEC 143 #ifdef IPSEC_POLICY_IPSEC 144 #define F_POLICY 0x4000 145 #endif /*IPSEC_POLICY_IPSEC*/ 146 #endif /*IPSEC*/ 147 #define F_TTL 0x8000 148 #define F_MISSED 0x10000 149 #define F_ONCE 0x20000 150 #define F_HDRINCL 0x40000 151 #define F_MASK 0x80000 152 #define F_TIME 0x100000 153 #define F_SWEEP 0x200000 154 #define F_WAITTIME 0x400000 155 156 /* 157 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 158 * number of received sequence numbers we can keep track of. Change 128 159 * to 8192 for complete accuracy... 160 */ 161 #define MAX_DUP_CHK (8 * 128) 162 static int mx_dup_ck = MAX_DUP_CHK; 163 static char rcvd_tbl[MAX_DUP_CHK / 8]; 164 165 static struct sockaddr_in whereto; /* who to ping */ 166 static int datalen = DEFDATALEN; 167 static int maxpayload; 168 static int ssend; /* send socket file descriptor */ 169 static int srecv; /* receive socket file descriptor */ 170 static u_char outpackhdr[IP_MAXPACKET], *outpack; 171 static char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */ 172 static char BSPACE = '\b'; /* characters written for flood */ 173 static char DOT = '.'; 174 static char *hostname; 175 static char *shostname; 176 static int ident; /* process id to identify our packets */ 177 static int uid; /* cached uid for micro-optimization */ 178 static u_char icmp_type = ICMP_ECHO; 179 static u_char icmp_type_rsp = ICMP_ECHOREPLY; 180 static int phdr_len = 0; 181 static int send_len; 182 183 /* counters */ 184 static long nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 185 static long npackets; /* max packets to transmit */ 186 static long nreceived; /* # of packets we got back */ 187 static long nrepeats; /* number of duplicates */ 188 static long ntransmitted; /* sequence # for outbound packets = #sent */ 189 static long snpackets; /* max packets to transmit in one sweep */ 190 static long sntransmitted; /* # of packets we sent in this sweep */ 191 static int sweepmax; /* max value of payload in sweep */ 192 static int sweepmin = 0; /* start value of payload in sweep */ 193 static int sweepincr = 1; /* payload increment in sweep */ 194 static int interval = 1000; /* interval between packets, ms */ 195 static int waittime = MAXWAIT; /* timeout for each packet */ 196 static long nrcvtimeout = 0; /* # of packets we got back after waittime */ 197 198 /* timing */ 199 static int timing; /* flag to do timing */ 200 static double tmin = 999999999.0; /* minimum round trip time */ 201 static double tmax = 0.0; /* maximum round trip time */ 202 static double tsum = 0.0; /* sum of all times, for doing average */ 203 static double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 204 205 /* nonzero if we've been told to finish up */ 206 static volatile sig_atomic_t finish_up; 207 static volatile sig_atomic_t siginfo_p; 208 209 static cap_channel_t *capdns; 210 211 static void fill(char *, char *); 212 static u_short in_cksum(u_char *, int); 213 static cap_channel_t *capdns_setup(void); 214 static void check_status(void); 215 static void finish(void) __dead2; 216 static void pinger(void); 217 static char *pr_addr(struct in_addr); 218 static char *pr_ntime(n_time); 219 static void pr_icmph(struct icmp *); 220 static void pr_iph(struct ip *); 221 static void pr_pack(char *, int, struct sockaddr_in *, struct timespec *); 222 static void pr_retip(struct ip *); 223 static void status(int); 224 static void stopit(int); 225 static void usage(void) __dead2; 226 227 int 228 main(int argc, char *const *argv) 229 { 230 struct sockaddr_in from, sock_in; 231 struct in_addr ifaddr; 232 struct timespec last, intvl; 233 struct iovec iov; 234 struct ip *ip; 235 struct msghdr msg; 236 struct sigaction si_sa; 237 size_t sz; 238 u_char *datap, packet[IP_MAXPACKET] __aligned(4); 239 char *ep, *source, *target, *payload; 240 struct hostent *hp; 241 #ifdef IPSEC_POLICY_IPSEC 242 char *policy_in, *policy_out; 243 #endif 244 struct sockaddr_in *to; 245 double t; 246 u_long alarmtimeout; 247 long ltmp; 248 int almost_done, ch, df, hold, i, icmp_len, mib[4], preload; 249 int ssend_errno, srecv_errno, tos, ttl; 250 char ctrl[CMSG_SPACE(sizeof(struct timespec))]; 251 char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN]; 252 #ifdef IP_OPTIONS 253 char rspace[MAX_IPOPTLEN]; /* record route space */ 254 #endif 255 unsigned char loop, mttl; 256 257 payload = source = NULL; 258 #ifdef IPSEC_POLICY_IPSEC 259 policy_in = policy_out = NULL; 260 #endif 261 cap_rights_t rights; 262 263 /* 264 * Do the stuff that we need root priv's for *first*, and 265 * then drop our setuid bit. Save error reporting for 266 * after arg parsing. 267 * 268 * Historicaly ping was using one socket 's' for sending and for 269 * receiving. After capsicum(4) related changes we use two 270 * sockets. It was done for special ping use case - when user 271 * issue ping on multicast or broadcast address replies come 272 * from different addresses, not from the address we 273 * connect(2)'ed to, and send socket do not receive those 274 * packets. 275 */ 276 ssend = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 277 ssend_errno = errno; 278 srecv = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 279 srecv_errno = errno; 280 281 if (setuid(getuid()) != 0) 282 err(EX_NOPERM, "setuid() failed"); 283 uid = getuid(); 284 285 if (ssend < 0) { 286 errno = ssend_errno; 287 err(EX_OSERR, "ssend socket"); 288 } 289 290 if (srecv < 0) { 291 errno = srecv_errno; 292 err(EX_OSERR, "srecv socket"); 293 } 294 295 alarmtimeout = df = preload = tos = 0; 296 297 outpack = outpackhdr + sizeof(struct ip); 298 while ((ch = getopt(argc, argv, 299 "Aac:DdfG:g:h:I:i:Ll:M:m:nop:QqRrS:s:T:t:vW:z:" 300 #ifdef IPSEC 301 #ifdef IPSEC_POLICY_IPSEC 302 "P:" 303 #endif /*IPSEC_POLICY_IPSEC*/ 304 #endif /*IPSEC*/ 305 )) != -1) 306 { 307 switch(ch) { 308 case 'A': 309 options |= F_MISSED; 310 break; 311 case 'a': 312 options |= F_AUDIBLE; 313 break; 314 case 'c': 315 ltmp = strtol(optarg, &ep, 0); 316 if (*ep || ep == optarg || ltmp <= 0) 317 errx(EX_USAGE, 318 "invalid count of packets to transmit: `%s'", 319 optarg); 320 npackets = ltmp; 321 break; 322 case 'D': 323 options |= F_HDRINCL; 324 df = 1; 325 break; 326 case 'd': 327 options |= F_SO_DEBUG; 328 break; 329 case 'f': 330 if (uid) { 331 errno = EPERM; 332 err(EX_NOPERM, "-f flag"); 333 } 334 options |= F_FLOOD; 335 setbuf(stdout, (char *)NULL); 336 break; 337 case 'G': /* Maximum packet size for ping sweep */ 338 ltmp = strtol(optarg, &ep, 0); 339 if (*ep || ep == optarg || ltmp <= 0) 340 errx(EX_USAGE, "invalid packet size: `%s'", 341 optarg); 342 if (uid != 0 && ltmp > DEFDATALEN) { 343 errno = EPERM; 344 err(EX_NOPERM, 345 "packet size too large: %ld > %u", 346 ltmp, DEFDATALEN); 347 } 348 options |= F_SWEEP; 349 sweepmax = ltmp; 350 break; 351 case 'g': /* Minimum packet size for ping sweep */ 352 ltmp = strtol(optarg, &ep, 0); 353 if (*ep || ep == optarg || ltmp <= 0) 354 errx(EX_USAGE, "invalid packet size: `%s'", 355 optarg); 356 if (uid != 0 && ltmp > DEFDATALEN) { 357 errno = EPERM; 358 err(EX_NOPERM, 359 "packet size too large: %ld > %u", 360 ltmp, DEFDATALEN); 361 } 362 options |= F_SWEEP; 363 sweepmin = ltmp; 364 break; 365 case 'h': /* Packet size increment for ping sweep */ 366 ltmp = strtol(optarg, &ep, 0); 367 if (*ep || ep == optarg || ltmp < 1) 368 errx(EX_USAGE, "invalid increment size: `%s'", 369 optarg); 370 if (uid != 0 && ltmp > DEFDATALEN) { 371 errno = EPERM; 372 err(EX_NOPERM, 373 "packet size too large: %ld > %u", 374 ltmp, DEFDATALEN); 375 } 376 options |= F_SWEEP; 377 sweepincr = ltmp; 378 break; 379 case 'I': /* multicast interface */ 380 if (inet_aton(optarg, &ifaddr) == 0) 381 errx(EX_USAGE, 382 "invalid multicast interface: `%s'", 383 optarg); 384 options |= F_MIF; 385 break; 386 case 'i': /* wait between sending packets */ 387 t = strtod(optarg, &ep) * 1000.0; 388 if (*ep || ep == optarg || t > (double)INT_MAX) 389 errx(EX_USAGE, "invalid timing interval: `%s'", 390 optarg); 391 options |= F_INTERVAL; 392 interval = (int)t; 393 if (uid && interval < 1000) { 394 errno = EPERM; 395 err(EX_NOPERM, "-i interval too short"); 396 } 397 break; 398 case 'L': 399 options |= F_NOLOOP; 400 loop = 0; 401 break; 402 case 'l': 403 ltmp = strtol(optarg, &ep, 0); 404 if (*ep || ep == optarg || ltmp > INT_MAX || ltmp < 0) 405 errx(EX_USAGE, 406 "invalid preload value: `%s'", optarg); 407 if (uid) { 408 errno = EPERM; 409 err(EX_NOPERM, "-l flag"); 410 } 411 preload = ltmp; 412 break; 413 case 'M': 414 switch(optarg[0]) { 415 case 'M': 416 case 'm': 417 options |= F_MASK; 418 break; 419 case 'T': 420 case 't': 421 options |= F_TIME; 422 break; 423 default: 424 errx(EX_USAGE, "invalid message: `%c'", optarg[0]); 425 break; 426 } 427 break; 428 case 'm': /* TTL */ 429 ltmp = strtol(optarg, &ep, 0); 430 if (*ep || ep == optarg || ltmp > MAXTTL || ltmp < 0) 431 errx(EX_USAGE, "invalid TTL: `%s'", optarg); 432 ttl = ltmp; 433 options |= F_TTL; 434 break; 435 case 'n': 436 options |= F_NUMERIC; 437 break; 438 case 'o': 439 options |= F_ONCE; 440 break; 441 #ifdef IPSEC 442 #ifdef IPSEC_POLICY_IPSEC 443 case 'P': 444 options |= F_POLICY; 445 if (!strncmp("in", optarg, 2)) 446 policy_in = strdup(optarg); 447 else if (!strncmp("out", optarg, 3)) 448 policy_out = strdup(optarg); 449 else 450 errx(1, "invalid security policy"); 451 break; 452 #endif /*IPSEC_POLICY_IPSEC*/ 453 #endif /*IPSEC*/ 454 case 'p': /* fill buffer with user pattern */ 455 options |= F_PINGFILLED; 456 payload = optarg; 457 break; 458 case 'Q': 459 options |= F_QUIET2; 460 break; 461 case 'q': 462 options |= F_QUIET; 463 break; 464 case 'R': 465 options |= F_RROUTE; 466 break; 467 case 'r': 468 options |= F_SO_DONTROUTE; 469 break; 470 case 'S': 471 source = optarg; 472 break; 473 case 's': /* size of packet to send */ 474 ltmp = strtol(optarg, &ep, 0); 475 if (*ep || ep == optarg || ltmp < 0) 476 errx(EX_USAGE, "invalid packet size: `%s'", 477 optarg); 478 if (uid != 0 && ltmp > DEFDATALEN) { 479 errno = EPERM; 480 err(EX_NOPERM, 481 "packet size too large: %ld > %u", 482 ltmp, DEFDATALEN); 483 } 484 datalen = ltmp; 485 break; 486 case 'T': /* multicast TTL */ 487 ltmp = strtol(optarg, &ep, 0); 488 if (*ep || ep == optarg || ltmp > MAXTTL || ltmp < 0) 489 errx(EX_USAGE, "invalid multicast TTL: `%s'", 490 optarg); 491 mttl = ltmp; 492 options |= F_MTTL; 493 break; 494 case 't': 495 alarmtimeout = strtoul(optarg, &ep, 0); 496 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 497 errx(EX_USAGE, "invalid timeout: `%s'", 498 optarg); 499 if (alarmtimeout > MAXALARM) 500 errx(EX_USAGE, "invalid timeout: `%s' > %d", 501 optarg, MAXALARM); 502 alarm((int)alarmtimeout); 503 break; 504 case 'v': 505 options |= F_VERBOSE; 506 break; 507 case 'W': /* wait ms for answer */ 508 t = strtod(optarg, &ep); 509 if (*ep || ep == optarg || t > (double)INT_MAX) 510 errx(EX_USAGE, "invalid timing interval: `%s'", 511 optarg); 512 options |= F_WAITTIME; 513 waittime = (int)t; 514 break; 515 case 'z': 516 options |= F_HDRINCL; 517 ltmp = strtol(optarg, &ep, 0); 518 if (*ep || ep == optarg || ltmp > MAXTOS || ltmp < 0) 519 errx(EX_USAGE, "invalid TOS: `%s'", optarg); 520 tos = ltmp; 521 break; 522 default: 523 usage(); 524 } 525 } 526 527 if (argc - optind != 1) 528 usage(); 529 target = argv[optind]; 530 531 switch (options & (F_MASK|F_TIME)) { 532 case 0: break; 533 case F_MASK: 534 icmp_type = ICMP_MASKREQ; 535 icmp_type_rsp = ICMP_MASKREPLY; 536 phdr_len = MASK_LEN; 537 if (!(options & F_QUIET)) 538 (void)printf("ICMP_MASKREQ\n"); 539 break; 540 case F_TIME: 541 icmp_type = ICMP_TSTAMP; 542 icmp_type_rsp = ICMP_TSTAMPREPLY; 543 phdr_len = TS_LEN; 544 if (!(options & F_QUIET)) 545 (void)printf("ICMP_TSTAMP\n"); 546 break; 547 default: 548 errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive."); 549 break; 550 } 551 icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len; 552 if (options & F_RROUTE) 553 icmp_len += MAX_IPOPTLEN; 554 maxpayload = IP_MAXPACKET - icmp_len; 555 if (datalen > maxpayload) 556 errx(EX_USAGE, "packet size too large: %d > %d", datalen, 557 maxpayload); 558 send_len = icmp_len + datalen; 559 datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN]; 560 if (options & F_PINGFILLED) { 561 fill((char *)datap, payload); 562 } 563 capdns = capdns_setup(); 564 if (source) { 565 bzero((char *)&sock_in, sizeof(sock_in)); 566 sock_in.sin_family = AF_INET; 567 if (inet_aton(source, &sock_in.sin_addr) != 0) { 568 shostname = source; 569 } else { 570 hp = cap_gethostbyname2(capdns, source, AF_INET); 571 if (!hp) 572 errx(EX_NOHOST, "cannot resolve %s: %s", 573 source, hstrerror(h_errno)); 574 575 sock_in.sin_len = sizeof sock_in; 576 if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) || 577 hp->h_length < 0) 578 errx(1, "gethostbyname2: illegal address"); 579 memcpy(&sock_in.sin_addr, hp->h_addr_list[0], 580 sizeof(sock_in.sin_addr)); 581 (void)strncpy(snamebuf, hp->h_name, 582 sizeof(snamebuf) - 1); 583 snamebuf[sizeof(snamebuf) - 1] = '\0'; 584 shostname = snamebuf; 585 } 586 if (bind(ssend, (struct sockaddr *)&sock_in, sizeof sock_in) == 587 -1) 588 err(1, "bind"); 589 } 590 591 bzero(&whereto, sizeof(whereto)); 592 to = &whereto; 593 to->sin_family = AF_INET; 594 to->sin_len = sizeof *to; 595 if (inet_aton(target, &to->sin_addr) != 0) { 596 hostname = target; 597 } else { 598 hp = cap_gethostbyname2(capdns, target, AF_INET); 599 if (!hp) 600 errx(EX_NOHOST, "cannot resolve %s: %s", 601 target, hstrerror(h_errno)); 602 603 if ((unsigned)hp->h_length > sizeof(to->sin_addr)) 604 errx(1, "gethostbyname2 returned an illegal address"); 605 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr); 606 (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1); 607 hnamebuf[sizeof(hnamebuf) - 1] = '\0'; 608 hostname = hnamebuf; 609 } 610 611 /* From now on we will use only reverse DNS lookups. */ 612 if (capdns != NULL) { 613 const char *types[1]; 614 615 types[0] = "ADDR2NAME"; 616 if (cap_dns_type_limit(capdns, types, 1) < 0) 617 err(1, "unable to limit access to system.dns service"); 618 } 619 620 if (connect(ssend, (struct sockaddr *)&whereto, sizeof(whereto)) != 0) 621 err(1, "connect"); 622 623 if (options & F_FLOOD && options & F_INTERVAL) 624 errx(EX_USAGE, "-f and -i: incompatible options"); 625 626 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 627 errx(EX_USAGE, 628 "-f flag cannot be used with multicast destination"); 629 if (options & (F_MIF | F_NOLOOP | F_MTTL) 630 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 631 errx(EX_USAGE, 632 "-I, -L, -T flags cannot be used with unicast destination"); 633 634 if (datalen >= TIMEVAL_LEN) /* can we time transfer */ 635 timing = 1; 636 637 if (!(options & F_PINGFILLED)) 638 for (i = TIMEVAL_LEN; i < datalen; ++i) 639 *datap++ = i; 640 641 ident = getpid() & 0xFFFF; 642 643 hold = 1; 644 if (options & F_SO_DEBUG) { 645 (void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold, 646 sizeof(hold)); 647 (void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold, 648 sizeof(hold)); 649 } 650 if (options & F_SO_DONTROUTE) 651 (void)setsockopt(ssend, SOL_SOCKET, SO_DONTROUTE, (char *)&hold, 652 sizeof(hold)); 653 #ifdef IPSEC 654 #ifdef IPSEC_POLICY_IPSEC 655 if (options & F_POLICY) { 656 char *buf; 657 if (policy_in != NULL) { 658 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 659 if (buf == NULL) 660 errx(EX_CONFIG, "%s", ipsec_strerror()); 661 if (setsockopt(srecv, IPPROTO_IP, IP_IPSEC_POLICY, 662 buf, ipsec_get_policylen(buf)) < 0) 663 err(EX_CONFIG, 664 "ipsec policy cannot be configured"); 665 free(buf); 666 } 667 668 if (policy_out != NULL) { 669 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 670 if (buf == NULL) 671 errx(EX_CONFIG, "%s", ipsec_strerror()); 672 if (setsockopt(ssend, IPPROTO_IP, IP_IPSEC_POLICY, 673 buf, ipsec_get_policylen(buf)) < 0) 674 err(EX_CONFIG, 675 "ipsec policy cannot be configured"); 676 free(buf); 677 } 678 } 679 #endif /*IPSEC_POLICY_IPSEC*/ 680 #endif /*IPSEC*/ 681 682 if (options & F_HDRINCL) { 683 ip = (struct ip*)outpackhdr; 684 if (!(options & (F_TTL | F_MTTL))) { 685 mib[0] = CTL_NET; 686 mib[1] = PF_INET; 687 mib[2] = IPPROTO_IP; 688 mib[3] = IPCTL_DEFTTL; 689 sz = sizeof(ttl); 690 if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1) 691 err(1, "sysctl(net.inet.ip.ttl)"); 692 } 693 setsockopt(ssend, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold)); 694 ip->ip_v = IPVERSION; 695 ip->ip_hl = sizeof(struct ip) >> 2; 696 ip->ip_tos = tos; 697 ip->ip_id = 0; 698 ip->ip_off = htons(df ? IP_DF : 0); 699 ip->ip_ttl = ttl; 700 ip->ip_p = IPPROTO_ICMP; 701 ip->ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY; 702 ip->ip_dst = to->sin_addr; 703 } 704 705 /* 706 * Here we enter capability mode. Further down access to global 707 * namespaces (e.g filesystem) is restricted (see capsicum(4)). 708 * We must connect(2) our socket before this point. 709 */ 710 caph_cache_catpages(); 711 if (caph_enter_casper() < 0) 712 err(1, "cap_enter"); 713 714 cap_rights_init(&rights, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT); 715 if (caph_rights_limit(srecv, &rights) < 0) 716 err(1, "cap_rights_limit srecv"); 717 cap_rights_init(&rights, CAP_SEND, CAP_SETSOCKOPT); 718 if (caph_rights_limit(ssend, &rights) < 0) 719 err(1, "cap_rights_limit ssend"); 720 721 /* record route option */ 722 if (options & F_RROUTE) { 723 #ifdef IP_OPTIONS 724 bzero(rspace, sizeof(rspace)); 725 rspace[IPOPT_OPTVAL] = IPOPT_RR; 726 rspace[IPOPT_OLEN] = sizeof(rspace) - 1; 727 rspace[IPOPT_OFFSET] = IPOPT_MINOFF; 728 rspace[sizeof(rspace) - 1] = IPOPT_EOL; 729 if (setsockopt(ssend, IPPROTO_IP, IP_OPTIONS, rspace, 730 sizeof(rspace)) < 0) 731 err(EX_OSERR, "setsockopt IP_OPTIONS"); 732 #else 733 errx(EX_UNAVAILABLE, 734 "record route not available in this implementation"); 735 #endif /* IP_OPTIONS */ 736 } 737 738 if (options & F_TTL) { 739 if (setsockopt(ssend, IPPROTO_IP, IP_TTL, &ttl, 740 sizeof(ttl)) < 0) { 741 err(EX_OSERR, "setsockopt IP_TTL"); 742 } 743 } 744 if (options & F_NOLOOP) { 745 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, 746 sizeof(loop)) < 0) { 747 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP"); 748 } 749 } 750 if (options & F_MTTL) { 751 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_TTL, &mttl, 752 sizeof(mttl)) < 0) { 753 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL"); 754 } 755 } 756 if (options & F_MIF) { 757 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr, 758 sizeof(ifaddr)) < 0) { 759 err(EX_OSERR, "setsockopt IP_MULTICAST_IF"); 760 } 761 } 762 #ifdef SO_TIMESTAMP 763 { 764 int on = 1; 765 int ts_clock = SO_TS_MONOTONIC; 766 if (setsockopt(srecv, SOL_SOCKET, SO_TIMESTAMP, &on, 767 sizeof(on)) < 0) 768 err(EX_OSERR, "setsockopt SO_TIMESTAMP"); 769 if (setsockopt(srecv, SOL_SOCKET, SO_TS_CLOCK, &ts_clock, 770 sizeof(ts_clock)) < 0) 771 err(EX_OSERR, "setsockopt SO_TS_CLOCK"); 772 } 773 #endif 774 if (sweepmax) { 775 if (sweepmin > sweepmax) 776 errx(EX_USAGE, "Maximum packet size must be no less than the minimum packet size"); 777 778 if (datalen != DEFDATALEN) 779 errx(EX_USAGE, "Packet size and ping sweep are mutually exclusive"); 780 781 if (npackets > 0) { 782 snpackets = npackets; 783 npackets = 0; 784 } else 785 snpackets = 1; 786 datalen = sweepmin; 787 send_len = icmp_len + sweepmin; 788 } 789 if (options & F_SWEEP && !sweepmax) 790 errx(EX_USAGE, "Maximum sweep size must be specified"); 791 792 /* 793 * When pinging the broadcast address, you can get a lot of answers. 794 * Doing something so evil is useful if you are trying to stress the 795 * ethernet, or just want to fill the arp cache to get some stuff for 796 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast 797 * or multicast pings if they wish. 798 */ 799 800 /* 801 * XXX receive buffer needs undetermined space for mbuf overhead 802 * as well. 803 */ 804 hold = IP_MAXPACKET + 128; 805 (void)setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 806 sizeof(hold)); 807 /* CAP_SETSOCKOPT removed */ 808 cap_rights_init(&rights, CAP_RECV, CAP_EVENT); 809 if (caph_rights_limit(srecv, &rights) < 0) 810 err(1, "cap_rights_limit srecv setsockopt"); 811 if (uid == 0) 812 (void)setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, (char *)&hold, 813 sizeof(hold)); 814 /* CAP_SETSOCKOPT removed */ 815 cap_rights_init(&rights, CAP_SEND); 816 if (caph_rights_limit(ssend, &rights) < 0) 817 err(1, "cap_rights_limit ssend setsockopt"); 818 819 if (to->sin_family == AF_INET) { 820 (void)printf("PING %s (%s)", hostname, 821 inet_ntoa(to->sin_addr)); 822 if (source) 823 (void)printf(" from %s", shostname); 824 if (sweepmax) 825 (void)printf(": (%d ... %d) data bytes\n", 826 sweepmin, sweepmax); 827 else 828 (void)printf(": %d data bytes\n", datalen); 829 830 } else { 831 if (sweepmax) 832 (void)printf("PING %s: (%d ... %d) data bytes\n", 833 hostname, sweepmin, sweepmax); 834 else 835 (void)printf("PING %s: %d data bytes\n", hostname, datalen); 836 } 837 838 /* 839 * Use sigaction() instead of signal() to get unambiguous semantics, 840 * in particular with SA_RESTART not set. 841 */ 842 843 sigemptyset(&si_sa.sa_mask); 844 si_sa.sa_flags = 0; 845 846 si_sa.sa_handler = stopit; 847 if (sigaction(SIGINT, &si_sa, 0) == -1) { 848 err(EX_OSERR, "sigaction SIGINT"); 849 } 850 851 si_sa.sa_handler = status; 852 if (sigaction(SIGINFO, &si_sa, 0) == -1) { 853 err(EX_OSERR, "sigaction"); 854 } 855 856 if (alarmtimeout > 0) { 857 si_sa.sa_handler = stopit; 858 if (sigaction(SIGALRM, &si_sa, 0) == -1) 859 err(EX_OSERR, "sigaction SIGALRM"); 860 } 861 862 bzero(&msg, sizeof(msg)); 863 msg.msg_name = (caddr_t)&from; 864 msg.msg_iov = &iov; 865 msg.msg_iovlen = 1; 866 #ifdef SO_TIMESTAMP 867 msg.msg_control = (caddr_t)ctrl; 868 #endif 869 iov.iov_base = packet; 870 iov.iov_len = IP_MAXPACKET; 871 872 if (preload == 0) 873 pinger(); /* send the first ping */ 874 else { 875 if (npackets != 0 && preload > npackets) 876 preload = npackets; 877 while (preload--) /* fire off them quickies */ 878 pinger(); 879 } 880 (void)clock_gettime(CLOCK_MONOTONIC, &last); 881 882 if (options & F_FLOOD) { 883 intvl.tv_sec = 0; 884 intvl.tv_nsec = 10000000; 885 } else { 886 intvl.tv_sec = interval / 1000; 887 intvl.tv_nsec = interval % 1000 * 1000000; 888 } 889 890 almost_done = 0; 891 while (!finish_up) { 892 struct timespec now, timeout; 893 fd_set rfds; 894 int cc, n; 895 896 check_status(); 897 if ((unsigned)srecv >= FD_SETSIZE) 898 errx(EX_OSERR, "descriptor too large"); 899 FD_ZERO(&rfds); 900 FD_SET(srecv, &rfds); 901 (void)clock_gettime(CLOCK_MONOTONIC, &now); 902 timespecadd(&last, &intvl, &timeout); 903 timespecsub(&timeout, &now, &timeout); 904 if (timeout.tv_sec < 0) 905 timespecclear(&timeout); 906 n = pselect(srecv + 1, &rfds, NULL, NULL, &timeout, NULL); 907 if (n < 0) 908 continue; /* Must be EINTR. */ 909 if (n == 1) { 910 struct timespec *tv = NULL; 911 #ifdef SO_TIMESTAMP 912 struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl; 913 914 msg.msg_controllen = sizeof(ctrl); 915 #endif 916 msg.msg_namelen = sizeof(from); 917 if ((cc = recvmsg(srecv, &msg, 0)) < 0) { 918 if (errno == EINTR) 919 continue; 920 warn("recvmsg"); 921 continue; 922 } 923 #ifdef SO_TIMESTAMP 924 if (cmsg->cmsg_level == SOL_SOCKET && 925 cmsg->cmsg_type == SCM_TIMESTAMP && 926 cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) { 927 /* Copy to avoid alignment problems: */ 928 memcpy(&now, CMSG_DATA(cmsg), sizeof(now)); 929 tv = &now; 930 } 931 #endif 932 if (tv == NULL) { 933 (void)clock_gettime(CLOCK_MONOTONIC, &now); 934 tv = &now; 935 } 936 pr_pack((char *)packet, cc, &from, tv); 937 if ((options & F_ONCE && nreceived) || 938 (npackets && nreceived >= npackets)) 939 break; 940 } 941 if (n == 0 || options & F_FLOOD) { 942 if (sweepmax && sntransmitted == snpackets) { 943 for (i = 0; i < sweepincr ; ++i) 944 *datap++ = i; 945 datalen += sweepincr; 946 if (datalen > sweepmax) 947 break; 948 send_len = icmp_len + datalen; 949 sntransmitted = 0; 950 } 951 if (!npackets || ntransmitted < npackets) 952 pinger(); 953 else { 954 if (almost_done) 955 break; 956 almost_done = 1; 957 intvl.tv_nsec = 0; 958 if (nreceived) { 959 intvl.tv_sec = 2 * tmax / 1000; 960 if (!intvl.tv_sec) 961 intvl.tv_sec = 1; 962 } else { 963 intvl.tv_sec = waittime / 1000; 964 intvl.tv_nsec = waittime % 1000 * 1000000; 965 } 966 } 967 (void)clock_gettime(CLOCK_MONOTONIC, &last); 968 if (ntransmitted - nreceived - 1 > nmissedmax) { 969 nmissedmax = ntransmitted - nreceived - 1; 970 if (options & F_MISSED) 971 (void)write(STDOUT_FILENO, &BBELL, 1); 972 } 973 } 974 } 975 finish(); 976 /* NOTREACHED */ 977 exit(0); /* Make the compiler happy */ 978 } 979 980 /* 981 * stopit -- 982 * Set the global bit that causes the main loop to quit. 983 * Do NOT call finish() from here, since finish() does far too much 984 * to be called from a signal handler. 985 */ 986 void 987 stopit(int sig __unused) 988 { 989 990 /* 991 * When doing reverse DNS lookups, the finish_up flag might not 992 * be noticed for a while. Just exit if we get a second SIGINT. 993 */ 994 if (!(options & F_NUMERIC) && finish_up) 995 _exit(nreceived ? 0 : 2); 996 finish_up = 1; 997 } 998 999 /* 1000 * pinger -- 1001 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1002 * will be added on by the kernel. The ID field is our UNIX process ID, 1003 * and the sequence number is an ascending integer. The first TIMEVAL_LEN 1004 * bytes of the data portion are used to hold a UNIX "timespec" struct in 1005 * host byte-order, to compute the round-trip time. 1006 */ 1007 static void 1008 pinger(void) 1009 { 1010 struct timespec now; 1011 struct tv32 tv32; 1012 struct ip *ip; 1013 struct icmp *icp; 1014 int cc, i; 1015 u_char *packet; 1016 1017 packet = outpack; 1018 icp = (struct icmp *)outpack; 1019 icp->icmp_type = icmp_type; 1020 icp->icmp_code = 0; 1021 icp->icmp_cksum = 0; 1022 icp->icmp_seq = htons(ntransmitted); 1023 icp->icmp_id = ident; /* ID */ 1024 1025 CLR(ntransmitted % mx_dup_ck); 1026 1027 if ((options & F_TIME) || timing) { 1028 (void)clock_gettime(CLOCK_MONOTONIC, &now); 1029 /* 1030 * Truncate seconds down to 32 bits in order 1031 * to fit the timestamp within 8 bytes of the 1032 * packet. We're only concerned with 1033 * durations, not absolute times. 1034 */ 1035 tv32.tv32_sec = (uint32_t)htonl(now.tv_sec); 1036 tv32.tv32_nsec = (uint32_t)htonl(now.tv_nsec); 1037 if (options & F_TIME) 1038 icp->icmp_otime = htonl((now.tv_sec % (24*60*60)) 1039 * 1000 + now.tv_nsec / 1000000); 1040 if (timing) 1041 bcopy((void *)&tv32, 1042 (void *)&outpack[ICMP_MINLEN + phdr_len], 1043 sizeof(tv32)); 1044 } 1045 1046 cc = ICMP_MINLEN + phdr_len + datalen; 1047 1048 /* compute ICMP checksum here */ 1049 icp->icmp_cksum = in_cksum((u_char *)icp, cc); 1050 1051 if (options & F_HDRINCL) { 1052 cc += sizeof(struct ip); 1053 ip = (struct ip *)outpackhdr; 1054 ip->ip_len = htons(cc); 1055 ip->ip_sum = in_cksum(outpackhdr, cc); 1056 packet = outpackhdr; 1057 } 1058 i = send(ssend, (char *)packet, cc, 0); 1059 if (i < 0 || i != cc) { 1060 if (i < 0) { 1061 if (options & F_FLOOD && errno == ENOBUFS) { 1062 usleep(FLOOD_BACKOFF); 1063 return; 1064 } 1065 warn("sendto"); 1066 } else { 1067 warn("%s: partial write: %d of %d bytes", 1068 hostname, i, cc); 1069 } 1070 } 1071 ntransmitted++; 1072 sntransmitted++; 1073 if (!(options & F_QUIET) && options & F_FLOOD) 1074 (void)write(STDOUT_FILENO, &DOT, 1); 1075 } 1076 1077 /* 1078 * pr_pack -- 1079 * Print out the packet, if it came from us. This logic is necessary 1080 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1081 * which arrive ('tis only fair). This permits multiple copies of this 1082 * program to be run without having intermingled output (or statistics!). 1083 */ 1084 static void 1085 pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timespec *tv) 1086 { 1087 struct in_addr ina; 1088 u_char *cp, *dp; 1089 struct icmp *icp; 1090 struct ip *ip; 1091 const void *tp; 1092 double triptime; 1093 int dupflag, hlen, i, j, recv_len; 1094 uint16_t seq; 1095 static int old_rrlen; 1096 static char old_rr[MAX_IPOPTLEN]; 1097 1098 /* Check the IP header */ 1099 ip = (struct ip *)buf; 1100 hlen = ip->ip_hl << 2; 1101 recv_len = cc; 1102 if (cc < hlen + ICMP_MINLEN) { 1103 if (options & F_VERBOSE) 1104 warn("packet too short (%d bytes) from %s", cc, 1105 inet_ntoa(from->sin_addr)); 1106 return; 1107 } 1108 1109 /* Now the ICMP part */ 1110 cc -= hlen; 1111 icp = (struct icmp *)(buf + hlen); 1112 if (icp->icmp_type == icmp_type_rsp) { 1113 if (icp->icmp_id != ident) 1114 return; /* 'Twas not our ECHO */ 1115 ++nreceived; 1116 triptime = 0.0; 1117 if (timing) { 1118 struct timespec tv1; 1119 struct tv32 tv32; 1120 #ifndef icmp_data 1121 tp = &icp->icmp_ip; 1122 #else 1123 tp = icp->icmp_data; 1124 #endif 1125 tp = (const char *)tp + phdr_len; 1126 1127 if ((size_t)(cc - ICMP_MINLEN - phdr_len) >= 1128 sizeof(tv1)) { 1129 /* Copy to avoid alignment problems: */ 1130 memcpy(&tv32, tp, sizeof(tv32)); 1131 tv1.tv_sec = ntohl(tv32.tv32_sec); 1132 tv1.tv_nsec = ntohl(tv32.tv32_nsec); 1133 timespecsub(tv, &tv1, tv); 1134 triptime = ((double)tv->tv_sec) * 1000.0 + 1135 ((double)tv->tv_nsec) / 1000000.0; 1136 tsum += triptime; 1137 tsumsq += triptime * triptime; 1138 if (triptime < tmin) 1139 tmin = triptime; 1140 if (triptime > tmax) 1141 tmax = triptime; 1142 } else 1143 timing = 0; 1144 } 1145 1146 seq = ntohs(icp->icmp_seq); 1147 1148 if (TST(seq % mx_dup_ck)) { 1149 ++nrepeats; 1150 --nreceived; 1151 dupflag = 1; 1152 } else { 1153 SET(seq % mx_dup_ck); 1154 dupflag = 0; 1155 } 1156 1157 if (options & F_QUIET) 1158 return; 1159 1160 if (options & F_WAITTIME && triptime > waittime) { 1161 ++nrcvtimeout; 1162 return; 1163 } 1164 1165 if (options & F_FLOOD) 1166 (void)write(STDOUT_FILENO, &BSPACE, 1); 1167 else { 1168 (void)printf("%d bytes from %s: icmp_seq=%u", cc, 1169 inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr), 1170 seq); 1171 (void)printf(" ttl=%d", ip->ip_ttl); 1172 if (timing) 1173 (void)printf(" time=%.3f ms", triptime); 1174 if (dupflag) 1175 (void)printf(" (DUP!)"); 1176 if (options & F_AUDIBLE) 1177 (void)write(STDOUT_FILENO, &BBELL, 1); 1178 if (options & F_MASK) { 1179 /* Just prentend this cast isn't ugly */ 1180 (void)printf(" mask=%s", 1181 inet_ntoa(*(struct in_addr *)&(icp->icmp_mask))); 1182 } 1183 if (options & F_TIME) { 1184 (void)printf(" tso=%s", pr_ntime(icp->icmp_otime)); 1185 (void)printf(" tsr=%s", pr_ntime(icp->icmp_rtime)); 1186 (void)printf(" tst=%s", pr_ntime(icp->icmp_ttime)); 1187 } 1188 if (recv_len != send_len) { 1189 (void)printf( 1190 "\nwrong total length %d instead of %d", 1191 recv_len, send_len); 1192 } 1193 /* check the data */ 1194 cp = (u_char*)&icp->icmp_data[phdr_len]; 1195 dp = &outpack[ICMP_MINLEN + phdr_len]; 1196 cc -= ICMP_MINLEN + phdr_len; 1197 i = 0; 1198 if (timing) { /* don't check variable timestamp */ 1199 cp += TIMEVAL_LEN; 1200 dp += TIMEVAL_LEN; 1201 cc -= TIMEVAL_LEN; 1202 i += TIMEVAL_LEN; 1203 } 1204 for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) { 1205 if (*cp != *dp) { 1206 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", 1207 i, *dp, *cp); 1208 (void)printf("\ncp:"); 1209 cp = (u_char*)&icp->icmp_data[0]; 1210 for (i = 0; i < datalen; ++i, ++cp) { 1211 if ((i % 16) == 8) 1212 (void)printf("\n\t"); 1213 (void)printf("%2x ", *cp); 1214 } 1215 (void)printf("\ndp:"); 1216 cp = &outpack[ICMP_MINLEN]; 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 break; 1223 } 1224 } 1225 } 1226 } else { 1227 /* 1228 * We've got something other than an ECHOREPLY. 1229 * See if it's a reply to something that we sent. 1230 * We can compare IP destination, protocol, 1231 * and ICMP type and ID. 1232 * 1233 * Only print all the error messages if we are running 1234 * as root to avoid leaking information not normally 1235 * available to those not running as root. 1236 */ 1237 #ifndef icmp_data 1238 struct ip *oip = &icp->icmp_ip; 1239 #else 1240 struct ip *oip = (struct ip *)icp->icmp_data; 1241 #endif 1242 struct icmp *oicmp = (struct icmp *)(oip + 1); 1243 1244 if (((options & F_VERBOSE) && uid == 0) || 1245 (!(options & F_QUIET2) && 1246 (oip->ip_dst.s_addr == whereto.sin_addr.s_addr) && 1247 (oip->ip_p == IPPROTO_ICMP) && 1248 (oicmp->icmp_type == ICMP_ECHO) && 1249 (oicmp->icmp_id == ident))) { 1250 (void)printf("%d bytes from %s: ", cc, 1251 pr_addr(from->sin_addr)); 1252 pr_icmph(icp); 1253 } else 1254 return; 1255 } 1256 1257 /* Display any IP options */ 1258 cp = (u_char *)buf + sizeof(struct ip); 1259 1260 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp) 1261 switch (*cp) { 1262 case IPOPT_EOL: 1263 hlen = 0; 1264 break; 1265 case IPOPT_LSRR: 1266 case IPOPT_SSRR: 1267 (void)printf(*cp == IPOPT_LSRR ? 1268 "\nLSRR: " : "\nSSRR: "); 1269 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1; 1270 hlen -= 2; 1271 cp += 2; 1272 if (j >= INADDR_LEN && 1273 j <= hlen - (int)sizeof(struct ip)) { 1274 for (;;) { 1275 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1276 if (ina.s_addr == 0) 1277 (void)printf("\t0.0.0.0"); 1278 else 1279 (void)printf("\t%s", 1280 pr_addr(ina)); 1281 hlen -= INADDR_LEN; 1282 cp += INADDR_LEN - 1; 1283 j -= INADDR_LEN; 1284 if (j < INADDR_LEN) 1285 break; 1286 (void)putchar('\n'); 1287 } 1288 } else 1289 (void)printf("\t(truncated route)\n"); 1290 break; 1291 case IPOPT_RR: 1292 j = cp[IPOPT_OLEN]; /* get length */ 1293 i = cp[IPOPT_OFFSET]; /* and pointer */ 1294 hlen -= 2; 1295 cp += 2; 1296 if (i > j) 1297 i = j; 1298 i = i - IPOPT_MINOFF + 1; 1299 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) { 1300 old_rrlen = 0; 1301 continue; 1302 } 1303 if (i == old_rrlen 1304 && !bcmp((char *)cp, old_rr, i) 1305 && !(options & F_FLOOD)) { 1306 (void)printf("\t(same route)"); 1307 hlen -= i; 1308 cp += i; 1309 break; 1310 } 1311 old_rrlen = i; 1312 bcopy((char *)cp, old_rr, i); 1313 (void)printf("\nRR: "); 1314 if (i >= INADDR_LEN && 1315 i <= hlen - (int)sizeof(struct ip)) { 1316 for (;;) { 1317 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1318 if (ina.s_addr == 0) 1319 (void)printf("\t0.0.0.0"); 1320 else 1321 (void)printf("\t%s", 1322 pr_addr(ina)); 1323 hlen -= INADDR_LEN; 1324 cp += INADDR_LEN - 1; 1325 i -= INADDR_LEN; 1326 if (i < INADDR_LEN) 1327 break; 1328 (void)putchar('\n'); 1329 } 1330 } else 1331 (void)printf("\t(truncated route)"); 1332 break; 1333 case IPOPT_NOP: 1334 (void)printf("\nNOP"); 1335 break; 1336 default: 1337 (void)printf("\nunknown option %x", *cp); 1338 break; 1339 } 1340 if (!(options & F_FLOOD)) { 1341 (void)putchar('\n'); 1342 (void)fflush(stdout); 1343 } 1344 } 1345 1346 /* 1347 * in_cksum -- 1348 * Checksum routine for Internet Protocol family headers (C Version) 1349 */ 1350 u_short 1351 in_cksum(u_char *addr, int len) 1352 { 1353 int nleft, sum; 1354 u_char *w; 1355 union { 1356 u_short us; 1357 u_char uc[2]; 1358 } last; 1359 u_short answer; 1360 1361 nleft = len; 1362 sum = 0; 1363 w = addr; 1364 1365 /* 1366 * Our algorithm is simple, using a 32 bit accumulator (sum), we add 1367 * sequential 16 bit words to it, and at the end, fold back all the 1368 * carry bits from the top 16 bits into the lower 16 bits. 1369 */ 1370 while (nleft > 1) { 1371 u_short data; 1372 1373 memcpy(&data, w, sizeof(data)); 1374 sum += data; 1375 w += sizeof(data); 1376 nleft -= sizeof(data); 1377 } 1378 1379 /* mop up an odd byte, if necessary */ 1380 if (nleft == 1) { 1381 last.uc[0] = *w; 1382 last.uc[1] = 0; 1383 sum += last.us; 1384 } 1385 1386 /* add back carry outs from top 16 bits to low 16 bits */ 1387 sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */ 1388 sum += (sum >> 16); /* add carry */ 1389 answer = ~sum; /* truncate to 16 bits */ 1390 return(answer); 1391 } 1392 1393 /* 1394 * status -- 1395 * Print out statistics when SIGINFO is received. 1396 */ 1397 1398 static void 1399 status(int sig __unused) 1400 { 1401 1402 siginfo_p = 1; 1403 } 1404 1405 static void 1406 check_status(void) 1407 { 1408 1409 if (siginfo_p) { 1410 siginfo_p = 0; 1411 (void)fprintf(stderr, "\r%ld/%ld packets received (%.1f%%)", 1412 nreceived, ntransmitted, 1413 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0); 1414 if (nreceived && timing) 1415 (void)fprintf(stderr, " %.3f min / %.3f avg / %.3f max", 1416 tmin, tsum / (nreceived + nrepeats), tmax); 1417 (void)fprintf(stderr, "\n"); 1418 } 1419 } 1420 1421 /* 1422 * finish -- 1423 * Print out statistics, and give up. 1424 */ 1425 static void 1426 finish(void) 1427 { 1428 1429 (void)signal(SIGINT, SIG_IGN); 1430 (void)signal(SIGALRM, SIG_IGN); 1431 (void)putchar('\n'); 1432 (void)fflush(stdout); 1433 (void)printf("--- %s ping statistics ---\n", hostname); 1434 (void)printf("%ld packets transmitted, ", ntransmitted); 1435 (void)printf("%ld packets received, ", nreceived); 1436 if (nrepeats) 1437 (void)printf("+%ld duplicates, ", nrepeats); 1438 if (ntransmitted) { 1439 if (nreceived > ntransmitted) 1440 (void)printf("-- somebody's printing up packets!"); 1441 else 1442 (void)printf("%.1f%% packet loss", 1443 ((ntransmitted - nreceived) * 100.0) / 1444 ntransmitted); 1445 } 1446 if (nrcvtimeout) 1447 (void)printf(", %ld packets out of wait time", nrcvtimeout); 1448 (void)putchar('\n'); 1449 if (nreceived && timing) { 1450 double n = nreceived + nrepeats; 1451 double avg = tsum / n; 1452 double vari = tsumsq / n - avg * avg; 1453 (void)printf( 1454 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", 1455 tmin, avg, tmax, sqrt(vari)); 1456 } 1457 1458 if (nreceived) 1459 exit(0); 1460 else 1461 exit(2); 1462 } 1463 1464 #ifdef notdef 1465 static char *ttab[] = { 1466 "Echo Reply", /* ip + seq + udata */ 1467 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */ 1468 "Source Quench", /* IP */ 1469 "Redirect", /* redirect type, gateway, + IP */ 1470 "Echo", 1471 "Time Exceeded", /* transit, frag reassem + IP */ 1472 "Parameter Problem", /* pointer + IP */ 1473 "Timestamp", /* id + seq + three timestamps */ 1474 "Timestamp Reply", /* " */ 1475 "Info Request", /* id + sq */ 1476 "Info Reply" /* " */ 1477 }; 1478 #endif 1479 1480 /* 1481 * pr_icmph -- 1482 * Print a descriptive string about an ICMP header. 1483 */ 1484 static void 1485 pr_icmph(struct icmp *icp) 1486 { 1487 1488 switch(icp->icmp_type) { 1489 case ICMP_ECHOREPLY: 1490 (void)printf("Echo Reply\n"); 1491 /* XXX ID + Seq + Data */ 1492 break; 1493 case ICMP_UNREACH: 1494 switch(icp->icmp_code) { 1495 case ICMP_UNREACH_NET: 1496 (void)printf("Destination Net Unreachable\n"); 1497 break; 1498 case ICMP_UNREACH_HOST: 1499 (void)printf("Destination Host Unreachable\n"); 1500 break; 1501 case ICMP_UNREACH_PROTOCOL: 1502 (void)printf("Destination Protocol Unreachable\n"); 1503 break; 1504 case ICMP_UNREACH_PORT: 1505 (void)printf("Destination Port Unreachable\n"); 1506 break; 1507 case ICMP_UNREACH_NEEDFRAG: 1508 (void)printf("frag needed and DF set (MTU %d)\n", 1509 ntohs(icp->icmp_nextmtu)); 1510 break; 1511 case ICMP_UNREACH_SRCFAIL: 1512 (void)printf("Source Route Failed\n"); 1513 break; 1514 case ICMP_UNREACH_FILTER_PROHIB: 1515 (void)printf("Communication prohibited by filter\n"); 1516 break; 1517 default: 1518 (void)printf("Dest Unreachable, Bad Code: %d\n", 1519 icp->icmp_code); 1520 break; 1521 } 1522 /* Print returned IP header information */ 1523 #ifndef icmp_data 1524 pr_retip(&icp->icmp_ip); 1525 #else 1526 pr_retip((struct ip *)icp->icmp_data); 1527 #endif 1528 break; 1529 case ICMP_SOURCEQUENCH: 1530 (void)printf("Source Quench\n"); 1531 #ifndef icmp_data 1532 pr_retip(&icp->icmp_ip); 1533 #else 1534 pr_retip((struct ip *)icp->icmp_data); 1535 #endif 1536 break; 1537 case ICMP_REDIRECT: 1538 switch(icp->icmp_code) { 1539 case ICMP_REDIRECT_NET: 1540 (void)printf("Redirect Network"); 1541 break; 1542 case ICMP_REDIRECT_HOST: 1543 (void)printf("Redirect Host"); 1544 break; 1545 case ICMP_REDIRECT_TOSNET: 1546 (void)printf("Redirect Type of Service and Network"); 1547 break; 1548 case ICMP_REDIRECT_TOSHOST: 1549 (void)printf("Redirect Type of Service and Host"); 1550 break; 1551 default: 1552 (void)printf("Redirect, Bad Code: %d", icp->icmp_code); 1553 break; 1554 } 1555 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr)); 1556 #ifndef icmp_data 1557 pr_retip(&icp->icmp_ip); 1558 #else 1559 pr_retip((struct ip *)icp->icmp_data); 1560 #endif 1561 break; 1562 case ICMP_ECHO: 1563 (void)printf("Echo Request\n"); 1564 /* XXX ID + Seq + Data */ 1565 break; 1566 case ICMP_TIMXCEED: 1567 switch(icp->icmp_code) { 1568 case ICMP_TIMXCEED_INTRANS: 1569 (void)printf("Time to live exceeded\n"); 1570 break; 1571 case ICMP_TIMXCEED_REASS: 1572 (void)printf("Frag reassembly time exceeded\n"); 1573 break; 1574 default: 1575 (void)printf("Time exceeded, Bad Code: %d\n", 1576 icp->icmp_code); 1577 break; 1578 } 1579 #ifndef icmp_data 1580 pr_retip(&icp->icmp_ip); 1581 #else 1582 pr_retip((struct ip *)icp->icmp_data); 1583 #endif 1584 break; 1585 case ICMP_PARAMPROB: 1586 (void)printf("Parameter problem: pointer = 0x%02x\n", 1587 icp->icmp_hun.ih_pptr); 1588 #ifndef icmp_data 1589 pr_retip(&icp->icmp_ip); 1590 #else 1591 pr_retip((struct ip *)icp->icmp_data); 1592 #endif 1593 break; 1594 case ICMP_TSTAMP: 1595 (void)printf("Timestamp\n"); 1596 /* XXX ID + Seq + 3 timestamps */ 1597 break; 1598 case ICMP_TSTAMPREPLY: 1599 (void)printf("Timestamp Reply\n"); 1600 /* XXX ID + Seq + 3 timestamps */ 1601 break; 1602 case ICMP_IREQ: 1603 (void)printf("Information Request\n"); 1604 /* XXX ID + Seq */ 1605 break; 1606 case ICMP_IREQREPLY: 1607 (void)printf("Information Reply\n"); 1608 /* XXX ID + Seq */ 1609 break; 1610 case ICMP_MASKREQ: 1611 (void)printf("Address Mask Request\n"); 1612 break; 1613 case ICMP_MASKREPLY: 1614 (void)printf("Address Mask Reply\n"); 1615 break; 1616 case ICMP_ROUTERADVERT: 1617 (void)printf("Router Advertisement\n"); 1618 break; 1619 case ICMP_ROUTERSOLICIT: 1620 (void)printf("Router Solicitation\n"); 1621 break; 1622 default: 1623 (void)printf("Bad ICMP type: %d\n", icp->icmp_type); 1624 } 1625 } 1626 1627 /* 1628 * pr_iph -- 1629 * Print an IP header with options. 1630 */ 1631 static void 1632 pr_iph(struct ip *ip) 1633 { 1634 struct in_addr ina; 1635 u_char *cp; 1636 int hlen; 1637 1638 hlen = ip->ip_hl << 2; 1639 cp = (u_char *)ip + 20; /* point to options */ 1640 1641 (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1642 (void)printf(" %1x %1x %02x %04x %04x", 1643 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len), 1644 ntohs(ip->ip_id)); 1645 (void)printf(" %1lx %04lx", 1646 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13, 1647 (u_long) ntohl(ip->ip_off) & 0x1fff); 1648 (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, 1649 ntohs(ip->ip_sum)); 1650 memcpy(&ina, &ip->ip_src.s_addr, sizeof ina); 1651 (void)printf(" %s ", inet_ntoa(ina)); 1652 memcpy(&ina, &ip->ip_dst.s_addr, sizeof ina); 1653 (void)printf(" %s ", inet_ntoa(ina)); 1654 /* dump any option bytes */ 1655 while (hlen-- > 20) { 1656 (void)printf("%02x", *cp++); 1657 } 1658 (void)putchar('\n'); 1659 } 1660 1661 /* 1662 * pr_addr -- 1663 * Return an ascii host address as a dotted quad and optionally with 1664 * a hostname. 1665 */ 1666 static char * 1667 pr_addr(struct in_addr ina) 1668 { 1669 struct hostent *hp; 1670 static char buf[16 + 3 + MAXHOSTNAMELEN]; 1671 1672 if (options & F_NUMERIC) 1673 return inet_ntoa(ina); 1674 1675 hp = cap_gethostbyaddr(capdns, (char *)&ina, 4, AF_INET); 1676 1677 if (hp == NULL) 1678 return inet_ntoa(ina); 1679 1680 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1681 inet_ntoa(ina)); 1682 return(buf); 1683 } 1684 1685 /* 1686 * pr_retip -- 1687 * Dump some info on a returned (via ICMP) IP packet. 1688 */ 1689 static void 1690 pr_retip(struct ip *ip) 1691 { 1692 u_char *cp; 1693 int hlen; 1694 1695 pr_iph(ip); 1696 hlen = ip->ip_hl << 2; 1697 cp = (u_char *)ip + hlen; 1698 1699 if (ip->ip_p == 6) 1700 (void)printf("TCP: from port %u, to port %u (decimal)\n", 1701 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1702 else if (ip->ip_p == 17) 1703 (void)printf("UDP: from port %u, to port %u (decimal)\n", 1704 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1705 } 1706 1707 static char * 1708 pr_ntime(n_time timestamp) 1709 { 1710 static char buf[10]; 1711 int hour, min, sec; 1712 1713 sec = ntohl(timestamp) / 1000; 1714 hour = sec / 60 / 60; 1715 min = (sec % (60 * 60)) / 60; 1716 sec = (sec % (60 * 60)) % 60; 1717 1718 (void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec); 1719 1720 return (buf); 1721 } 1722 1723 static void 1724 fill(char *bp, char *patp) 1725 { 1726 char *cp; 1727 int pat[16]; 1728 u_int ii, jj, kk; 1729 1730 for (cp = patp; *cp; cp++) { 1731 if (!isxdigit(*cp)) 1732 errx(EX_USAGE, 1733 "patterns must be specified as hex digits"); 1734 1735 } 1736 ii = sscanf(patp, 1737 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1738 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 1739 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 1740 &pat[13], &pat[14], &pat[15]); 1741 1742 if (ii > 0) 1743 for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii) 1744 for (jj = 0; jj < ii; ++jj) 1745 bp[jj + kk] = pat[jj]; 1746 if (!(options & F_QUIET)) { 1747 (void)printf("PATTERN: 0x"); 1748 for (jj = 0; jj < ii; ++jj) 1749 (void)printf("%02x", bp[jj] & 0xFF); 1750 (void)printf("\n"); 1751 } 1752 } 1753 1754 static cap_channel_t * 1755 capdns_setup(void) 1756 { 1757 cap_channel_t *capcas, *capdnsloc; 1758 const char *types[2]; 1759 int families[1]; 1760 1761 capcas = cap_init(); 1762 if (capcas == NULL) 1763 err(1, "unable to create casper process"); 1764 capdnsloc = cap_service_open(capcas, "system.dns"); 1765 /* Casper capability no longer needed. */ 1766 cap_close(capcas); 1767 if (capdnsloc == NULL) 1768 err(1, "unable to open system.dns service"); 1769 types[0] = "NAME2ADDR"; 1770 types[1] = "ADDR2NAME"; 1771 if (cap_dns_type_limit(capdnsloc, types, 2) < 0) 1772 err(1, "unable to limit access to system.dns service"); 1773 families[0] = AF_INET; 1774 if (cap_dns_family_limit(capdnsloc, families, 1) < 0) 1775 err(1, "unable to limit access to system.dns service"); 1776 1777 return (capdnsloc); 1778 } 1779 1780 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 1781 #define SECOPT " [-P policy]" 1782 #else 1783 #define SECOPT "" 1784 #endif 1785 static void 1786 usage(void) 1787 { 1788 1789 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 1790 "usage: ping [-AaDdfnoQqRrv] [-c count] [-G sweepmaxsize] [-g sweepminsize]", 1791 " [-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]", 1792 " " SECOPT " [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]", 1793 " [-W waittime] [-z tos] host", 1794 " ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]", 1795 " [-M mask | time] [-m ttl]" SECOPT " [-p pattern] [-S src_addr]", 1796 " [-s packetsize] [-T ttl] [-t timeout] [-W waittime]", 1797 " [-z tos] mcast-group"); 1798 exit(EX_USAGE); 1799 } 1800