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/* 36 * P I N G . C 37 * 38 * Using the Internet Control Message Protocol (ICMP) "ECHO" facility, 39 * measure round-trip-delays and packet loss across network paths. 40 * 41 * Author - 42 * Mike Muuss 43 * U. S. Army Ballistic Research Laboratory 44 * December, 1983 45 * 46 * Status - 47 * Public Domain. Distribution Unlimited. 48 * Bugs - 49 * More statistics could always be gathered. 50 * This program has to run SUID to ROOT to access the ICMP socket. 51 */ 52 53#include <sys/param.h> /* NB: we rely on this for <sys/types.h> */ 54#ifndef __HAIKU__ 55#include <sys/capsicum.h> 56#endif 57#include <sys/socket.h> 58#ifndef __HAIKU__ 59#include <sys/sysctl.h> 60#endif 61#include <sys/time.h> 62#include <sys/uio.h> 63 64#include <netinet/in.h> 65#include <netinet/in_systm.h> 66#include <netinet/ip.h> 67#include <netinet/ip_icmp.h> 68#include <netinet/ip_var.h> 69#include <arpa/inet.h> 70 71#ifndef __HAIKU__ 72#include <libcasper.h> 73#include <casper/cap_dns.h> 74#endif 75 76#ifdef IPSEC 77#include <netipsec/ipsec.h> 78#endif /*IPSEC*/ 79 80#ifndef __HAIKU__ 81#include <capsicum_helpers.h> 82#endif 83#include <ctype.h> 84#include <err.h> 85#include <errno.h> 86#include <netdb.h> 87#include <stddef.h> 88#include <signal.h> 89#include <stdio.h> 90#include <stdlib.h> 91#include <string.h> 92#include <sysexits.h> 93#include <time.h> 94#include <unistd.h> 95 96#include "main.h" 97#include "ping.h" 98#include "utils.h" 99 100#define INADDR_LEN ((int)sizeof(in_addr_t)) 101#define TIMEVAL_LEN ((int)sizeof(struct tv32)) 102#define MASK_LEN (ICMP_MASKLEN - ICMP_MINLEN) 103#define TS_LEN (ICMP_TSLEN - ICMP_MINLEN) 104#define DEFDATALEN 56 /* default data length */ 105#define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */ 106 /* runs out of buffer space */ 107#define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN) 108#define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN) 109#define MAXWAIT 10000 /* max ms to wait for response */ 110#define MAXALARM (60 * 60) /* max seconds for alarm timeout */ 111#define MAXTOS 255 112 113#define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 114#define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 115#define SET(bit) (A(bit) |= B(bit)) 116#define CLR(bit) (A(bit) &= (~B(bit))) 117#define TST(bit) (A(bit) & B(bit)) 118 119struct tv32 { 120 int32_t tv32_sec; 121 int32_t tv32_nsec; 122}; 123 124/* various options */ 125#define F_FLOOD 0x0001 126#define F_INTERVAL 0x0002 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#define F_IP_VLAN_PCP 0x800000 152#define F_DOT 0x1000000 153 154/* 155 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 156 * number of received sequence numbers we can keep track of. Change 128 157 * to 8192 for complete accuracy... 158 */ 159#define MAX_DUP_CHK (8 * 128) 160static int mx_dup_ck = MAX_DUP_CHK; 161static char rcvd_tbl[MAX_DUP_CHK / 8]; 162 163static struct sockaddr_in whereto; /* who to ping */ 164static int datalen = DEFDATALEN; 165static int maxpayload; 166static int ssend; /* send socket file descriptor */ 167static int srecv; /* receive socket file descriptor */ 168static u_char outpackhdr[IP_MAXPACKET], *outpack; 169static char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */ 170static char BSPACE = '\b'; /* characters written for flood */ 171static const char *DOT = "."; 172static size_t DOTlen = 1; 173static size_t DOTidx = 0; 174static char *shostname; 175static int ident; /* process id to identify our packets */ 176static int uid; /* cached uid for micro-optimization */ 177static u_char icmp_type = ICMP_ECHO; 178static u_char icmp_type_rsp = ICMP_ECHOREPLY; 179static int phdr_len = 0; 180static int send_len; 181 182/* counters */ 183static long nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 184static long npackets; /* max packets to transmit */ 185static long snpackets; /* max packets to transmit in one sweep */ 186static long sntransmitted; /* # of packets we sent in this sweep */ 187static int sweepmax; /* max value of payload in sweep */ 188static int sweepmin = 0; /* start value of payload in sweep */ 189static int sweepincr = 1; /* payload increment in sweep */ 190static int interval = 1000; /* interval between packets, ms */ 191static int waittime = MAXWAIT; /* timeout for each packet */ 192 193#ifndef __HAIKU__ 194static cap_channel_t *capdns; 195#endif 196 197static void fill(char *, char *); 198#ifndef __HAIKU__ 199static cap_channel_t *capdns_setup(void); 200#endif 201static void pinger(void); 202static char *pr_addr(struct in_addr); 203static char *pr_ntime(n_time); 204static void pr_icmph(struct icmp *, struct ip *, const u_char *const); 205static void pr_iph(struct ip *, const u_char *); 206static void pr_pack(char *, ssize_t, struct sockaddr_in *, struct timespec *); 207 208int 209ping(int argc, char *const *argv) 210{ 211 struct sockaddr_in from, sock_in; 212 struct in_addr ifaddr; 213 struct timespec last, intvl; 214 struct iovec iov; 215 struct msghdr msg; 216 struct sigaction si_sa; 217 size_t sz; 218#ifdef __HAIKU__ 219#define __aligned(x) __attribute__((__aligned__(x))) 220#endif 221 u_char *datap, packet[IP_MAXPACKET] __aligned(4); 222 const char *errstr; 223 char *ep, *source, *target, *payload; 224 struct hostent *hp; 225#ifdef IPSEC_POLICY_IPSEC 226 char *policy_in, *policy_out; 227#endif 228 struct sockaddr_in *to; 229 double t; 230 u_long alarmtimeout; 231 long long ltmp; 232 int almost_done, ch, df, hold, i, icmp_len, mib[4], preload; 233 int ssend_errno, srecv_errno, tos, ttl, pcp; 234 char ctrl[CMSG_SPACE(sizeof(struct timespec))]; 235 char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN]; 236#ifdef IP_OPTIONS 237 char rspace[MAX_IPOPTLEN]; /* record route space */ 238#endif 239 unsigned char loop, mttl; 240 241 payload = source = NULL; 242#ifdef IPSEC_POLICY_IPSEC 243 policy_in = policy_out = NULL; 244#endif 245#ifndef __HAIKU__ 246 cap_rights_t rights; 247#endif 248 249 /* 250 * Do the stuff that we need root priv's for *first*, and 251 * then drop our setuid bit. Save error reporting for 252 * after arg parsing. 253 * 254 * Historicaly ping was using one socket 's' for sending and for 255 * receiving. After capsicum(4) related changes we use two 256 * sockets. It was done for special ping use case - when user 257 * issue ping on multicast or broadcast address replies come 258 * from different addresses, not from the address we 259 * connect(2)'ed to, and send socket do not receive those 260 * packets. 261 */ 262 ssend = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 263 ssend_errno = errno; 264 srecv = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 265 srecv_errno = errno; 266 267 if (setuid(getuid()) != 0) 268 err(EX_NOPERM, "setuid() failed"); 269 uid = getuid(); 270 271 if (ssend < 0) { 272 errno = ssend_errno; 273 err(EX_OSERR, "ssend socket"); 274 } 275 276 if (srecv < 0) { 277 errno = srecv_errno; 278 err(EX_OSERR, "srecv socket"); 279 } 280 281 alarmtimeout = df = preload = tos = pcp = 0; 282 283 outpack = outpackhdr + sizeof(struct ip); 284 while ((ch = getopt(argc, argv, PING4OPTS)) != -1) { 285 switch(ch) { 286 case '.': 287 options |= F_DOT; 288 if (optarg != NULL) { 289 DOT = optarg; 290 DOTlen = strlen(optarg); 291 } 292 break; 293 case '4': 294 /* This option is processed in main(). */ 295 break; 296 case 'A': 297 options |= F_MISSED; 298 break; 299 case 'a': 300 options |= F_AUDIBLE; 301 break; 302 case 'C': 303#ifndef __HAIKU__ 304 options |= F_IP_VLAN_PCP; 305 ltmp = strtonum(optarg, -1, 7, &errstr); 306 if (errstr != NULL) 307 errx(EX_USAGE, "invalid PCP: `%s'", optarg); 308 pcp = ltmp; 309#else 310 errx(EX_UNAVAILABLE, "VLAN PCP not available"); 311#endif 312 break; 313 case 'c': 314 ltmp = strtonum(optarg, 1, LONG_MAX, &errstr); 315 if (errstr != NULL) 316 errx(EX_USAGE, 317 "invalid count of packets to transmit: `%s'", 318 optarg); 319 npackets = (long)ltmp; 320 break; 321 case 'D': 322 options |= F_HDRINCL; 323 df = 1; 324 break; 325 case 'd': 326 options |= F_SO_DEBUG; 327 break; 328 case 'f': 329 if (uid) { 330 errno = EPERM; 331 err(EX_NOPERM, "-f flag"); 332 } 333 options |= F_FLOOD; 334 options |= F_DOT; 335 setbuf(stdout, (char *)NULL); 336 break; 337 case 'G': /* Maximum packet size for ping sweep */ 338 ltmp = strtonum(optarg, 1, INT_MAX, &errstr); 339 if (errstr != NULL) { 340 errx(EX_USAGE, "invalid packet size: `%s'", 341 optarg); 342 } 343 sweepmax = (int)ltmp; 344 if (uid != 0 && sweepmax > DEFDATALEN) { 345 errc(EX_NOPERM, EPERM, 346 "packet size too large: %d > %u", 347 sweepmax, DEFDATALEN); 348 } 349 options |= F_SWEEP; 350 break; 351 case 'g': /* Minimum packet size for ping sweep */ 352 ltmp = strtonum(optarg, 1, INT_MAX, &errstr); 353 if (errstr != NULL) { 354 errx(EX_USAGE, "invalid packet size: `%s'", 355 optarg); 356 } 357 sweepmin = (int)ltmp; 358 if (uid != 0 && sweepmin > DEFDATALEN) { 359 errc(EX_NOPERM, EPERM, 360 "packet size too large: %d > %u", 361 sweepmin, DEFDATALEN); 362 } 363 options |= F_SWEEP; 364 break; 365 case 'H': 366 options |= F_HOSTNAME; 367 break; 368 case 'h': /* Packet size increment for ping sweep */ 369 ltmp = strtonum(optarg, 1, INT_MAX, &errstr); 370 if (errstr != NULL) { 371 errx(EX_USAGE, "invalid packet size: `%s'", 372 optarg); 373 } 374 sweepincr = (int)ltmp; 375 if (uid != 0 && sweepincr > DEFDATALEN) { 376 errc(EX_NOPERM, EPERM, 377 "packet size too large: %d > %u", 378 sweepincr, DEFDATALEN); 379 } 380 options |= F_SWEEP; 381 break; 382 case 'I': /* multicast interface */ 383 if (inet_aton(optarg, &ifaddr) == 0) 384 errx(EX_USAGE, 385 "invalid multicast interface: `%s'", 386 optarg); 387 options |= F_MIF; 388 break; 389 case 'i': /* wait between sending packets */ 390 t = strtod(optarg, &ep) * 1000.0; 391 if (*ep || ep == optarg || t > (double)INT_MAX) 392 errx(EX_USAGE, "invalid timing interval: `%s'", 393 optarg); 394 options |= F_INTERVAL; 395 interval = (int)t; 396 if (uid && interval < 1000) { 397 errno = EPERM; 398 err(EX_NOPERM, "-i interval too short"); 399 } 400 break; 401 case 'L': 402 options |= F_NOLOOP; 403 loop = 0; 404 break; 405 case 'l': 406 ltmp = strtonum(optarg, 0, INT_MAX, &errstr); 407 if (errstr != NULL) 408 errx(EX_USAGE, 409 "invalid preload value: `%s'", optarg); 410 if (uid) { 411 errno = EPERM; 412 err(EX_NOPERM, "-l flag"); 413 } 414 preload = (int)ltmp; 415 break; 416 case 'M': 417 switch(optarg[0]) { 418 case 'M': 419 case 'm': 420 options |= F_MASK; 421 break; 422 case 'T': 423 case 't': 424 options |= F_TIME; 425 break; 426 default: 427 errx(EX_USAGE, "invalid message: `%c'", optarg[0]); 428 break; 429 } 430 break; 431 case 'm': /* TTL */ 432 ltmp = strtonum(optarg, 0, MAXTTL, &errstr); 433 if (errstr != NULL) 434 errx(EX_USAGE, "invalid TTL: `%s'", optarg); 435 ttl = (int)ltmp; 436 options |= F_TTL; 437 break; 438 case 'n': 439 options &= ~F_HOSTNAME; 440 break; 441 case 'o': 442 options |= F_ONCE; 443 break; 444#ifdef IPSEC 445#ifdef IPSEC_POLICY_IPSEC 446 case 'P': 447 options |= F_POLICY; 448 if (!strncmp("in", optarg, 2)) 449 policy_in = strdup(optarg); 450 else if (!strncmp("out", optarg, 3)) 451 policy_out = strdup(optarg); 452 else 453 errx(1, "invalid security policy"); 454 break; 455#endif /*IPSEC_POLICY_IPSEC*/ 456#endif /*IPSEC*/ 457 case 'p': /* fill buffer with user pattern */ 458 options |= F_PINGFILLED; 459 payload = optarg; 460 break; 461 case 'Q': 462 options |= F_QUIET2; 463 break; 464 case 'q': 465 options |= F_QUIET; 466 break; 467 case 'R': 468 options |= F_RROUTE; 469 break; 470 case 'r': 471 options |= F_SO_DONTROUTE; 472 break; 473 case 'S': 474 source = optarg; 475 break; 476 case 's': /* size of packet to send */ 477 ltmp = strtonum(optarg, 0, INT_MAX, &errstr); 478 if (errstr != NULL) 479 errx(EX_USAGE, "invalid packet size: `%s'", 480 optarg); 481 datalen = (int)ltmp; 482 if (uid != 0 && datalen > DEFDATALEN) { 483 errno = EPERM; 484 err(EX_NOPERM, 485 "packet size too large: %d > %u", 486 datalen, DEFDATALEN); 487 } 488 break; 489 case 'T': /* multicast TTL */ 490 ltmp = strtonum(optarg, 0, MAXTTL, &errstr); 491 if (errstr != NULL) 492 errx(EX_USAGE, "invalid multicast TTL: `%s'", 493 optarg); 494 mttl = (unsigned char)ltmp; 495 options |= F_MTTL; 496 break; 497 case 't': 498 alarmtimeout = strtoul(optarg, &ep, 0); 499 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 500 errx(EX_USAGE, "invalid timeout: `%s'", 501 optarg); 502 if (alarmtimeout > MAXALARM) 503 errx(EX_USAGE, "invalid timeout: `%s' > %d", 504 optarg, MAXALARM); 505 { 506 struct itimerval itv; 507 508 timerclear(&itv.it_interval); 509 timerclear(&itv.it_value); 510 itv.it_value.tv_sec = (time_t)alarmtimeout; 511 if (setitimer(ITIMER_REAL, &itv, NULL) != 0) 512 err(1, "setitimer"); 513 } 514 break; 515 case 'v': 516 options |= F_VERBOSE; 517 break; 518 case 'W': /* wait ms for answer */ 519 t = strtod(optarg, &ep); 520 if (*ep || ep == optarg || t > (double)INT_MAX) 521 errx(EX_USAGE, "invalid timing interval: `%s'", 522 optarg); 523 options |= F_WAITTIME; 524 waittime = (int)t; 525 break; 526 case 'z': 527 options |= F_HDRINCL; 528 ltmp = strtol(optarg, &ep, 0); 529 if (*ep || ep == optarg || ltmp > MAXTOS || ltmp < 0) 530 errx(EX_USAGE, "invalid TOS: `%s'", optarg); 531 tos = ltmp; 532 break; 533 default: 534 usage(); 535 } 536 } 537 538 if (argc - optind != 1) 539 usage(); 540 target = argv[optind]; 541 542 switch (options & (F_MASK|F_TIME)) { 543 case 0: break; 544 case F_MASK: 545 icmp_type = ICMP_MASKREQ; 546 icmp_type_rsp = ICMP_MASKREPLY; 547 phdr_len = MASK_LEN; 548 if (!(options & F_QUIET)) 549 (void)printf("ICMP_MASKREQ\n"); 550 break; 551 case F_TIME: 552 icmp_type = ICMP_TSTAMP; 553 icmp_type_rsp = ICMP_TSTAMPREPLY; 554 phdr_len = TS_LEN; 555 if (!(options & F_QUIET)) 556 (void)printf("ICMP_TSTAMP\n"); 557 break; 558 default: 559 errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive."); 560 break; 561 } 562 icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len; 563 if (options & F_RROUTE) 564 icmp_len += MAX_IPOPTLEN; 565 maxpayload = IP_MAXPACKET - icmp_len; 566 if (datalen > maxpayload) 567 errx(EX_USAGE, "packet size too large: %d > %d", datalen, 568 maxpayload); 569 send_len = icmp_len + datalen; 570 datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN]; 571 if (options & F_PINGFILLED) { 572 fill((char *)datap, payload); 573 } 574#ifndef __HAIKU__ 575 capdns = capdns_setup(); 576#else 577#define cap_gethostbyname2(x, y, z) gethostbyname(y); 578#endif 579 if (source) { 580 bzero((char *)&sock_in, sizeof(sock_in)); 581 sock_in.sin_family = AF_INET; 582 if (inet_aton(source, &sock_in.sin_addr) != 0) { 583 shostname = source; 584 } else { 585 hp = cap_gethostbyname2(capdns, source, AF_INET); 586 if (!hp) 587 errx(EX_NOHOST, "cannot resolve %s: %s", 588 source, hstrerror(h_errno)); 589 590 sock_in.sin_len = sizeof sock_in; 591 if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) || 592 hp->h_length < 0) 593 errx(1, "gethostbyname2: illegal address"); 594 memcpy(&sock_in.sin_addr, hp->h_addr_list[0], 595 sizeof(sock_in.sin_addr)); 596 (void)strncpy(snamebuf, hp->h_name, 597 sizeof(snamebuf) - 1); 598 snamebuf[sizeof(snamebuf) - 1] = '\0'; 599 shostname = snamebuf; 600 } 601 if (bind(ssend, (struct sockaddr *)&sock_in, sizeof sock_in) == 602 -1) 603 err(1, "bind"); 604 } 605 606 bzero(&whereto, sizeof(whereto)); 607 to = &whereto; 608 to->sin_family = AF_INET; 609 to->sin_len = sizeof *to; 610 if (inet_aton(target, &to->sin_addr) != 0) { 611 hostname = target; 612 } else { 613 hp = cap_gethostbyname2(capdns, target, AF_INET); 614 if (!hp) 615 errx(EX_NOHOST, "cannot resolve %s: %s", 616 target, hstrerror(h_errno)); 617 618 if ((unsigned)hp->h_length > sizeof(to->sin_addr)) 619 errx(1, "gethostbyname2 returned an illegal address"); 620 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr); 621 (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1); 622 hnamebuf[sizeof(hnamebuf) - 1] = '\0'; 623 hostname = hnamebuf; 624 } 625 626 /* From now on we will use only reverse DNS lookups. */ 627#ifdef WITH_CASPER 628 if (capdns != NULL) { 629 const char *types[1]; 630 631 types[0] = "ADDR2NAME"; 632 if (cap_dns_type_limit(capdns, types, 1) < 0) 633 err(1, "unable to limit access to system.dns service"); 634 } 635#endif 636 if (connect(ssend, (struct sockaddr *)&whereto, sizeof(whereto)) != 0) 637 err(1, "connect"); 638 639 if (options & F_FLOOD && options & F_INTERVAL) 640 errx(EX_USAGE, "-f and -i: incompatible options"); 641 642 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 643 errx(EX_USAGE, 644 "-f flag cannot be used with multicast destination"); 645 if (options & (F_MIF | F_NOLOOP | F_MTTL) 646 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 647 errx(EX_USAGE, 648 "-I, -L, -T flags cannot be used with unicast destination"); 649 650 if (datalen >= TIMEVAL_LEN) /* can we time transfer */ 651 timing = 1; 652 653 if ((options & (F_PINGFILLED | F_SWEEP)) == 0) 654 for (i = TIMEVAL_LEN; i < datalen; ++i) 655 *datap++ = i; 656 657 ident = getpid() & 0xFFFF; 658 659 hold = 1; 660 if (options & F_SO_DEBUG) { 661 (void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold, 662 sizeof(hold)); 663 (void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold, 664 sizeof(hold)); 665 } 666 if (options & F_SO_DONTROUTE) 667 (void)setsockopt(ssend, SOL_SOCKET, SO_DONTROUTE, (char *)&hold, 668 sizeof(hold)); 669#ifndef __HAIKU__ 670 if (options & F_IP_VLAN_PCP) { 671 (void)setsockopt(ssend, IPPROTO_IP, IP_VLAN_PCP, (char *)&pcp, 672 sizeof(pcp)); 673 } 674#endif 675#ifdef IPSEC 676#ifdef IPSEC_POLICY_IPSEC 677 if (options & F_POLICY) { 678 char *buf; 679 if (policy_in != NULL) { 680 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 681 if (buf == NULL) 682 errx(EX_CONFIG, "%s", ipsec_strerror()); 683 if (setsockopt(srecv, IPPROTO_IP, IP_IPSEC_POLICY, 684 buf, ipsec_get_policylen(buf)) < 0) 685 err(EX_CONFIG, 686 "ipsec policy cannot be configured"); 687 free(buf); 688 } 689 690 if (policy_out != NULL) { 691 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 692 if (buf == NULL) 693 errx(EX_CONFIG, "%s", ipsec_strerror()); 694 if (setsockopt(ssend, IPPROTO_IP, IP_IPSEC_POLICY, 695 buf, ipsec_get_policylen(buf)) < 0) 696 err(EX_CONFIG, 697 "ipsec policy cannot be configured"); 698 free(buf); 699 } 700 } 701#endif /*IPSEC_POLICY_IPSEC*/ 702#endif /*IPSEC*/ 703 704 if (options & F_HDRINCL) { 705 struct ip ip; 706 707#ifndef __HAIKU__ 708 memcpy(&ip, outpackhdr, sizeof(ip)); 709 if (!(options & (F_TTL | F_MTTL))) { 710 mib[0] = CTL_NET; 711 mib[1] = PF_INET; 712 mib[2] = IPPROTO_IP; 713 mib[3] = IPCTL_DEFTTL; 714 sz = sizeof(ttl); 715 if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1) 716 err(1, "sysctl(net.inet.ip.ttl)"); 717 } 718#endif 719 setsockopt(ssend, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold)); 720 ip.ip_v = IPVERSION; 721 ip.ip_hl = sizeof(struct ip) >> 2; 722 ip.ip_tos = tos; 723 ip.ip_id = 0; 724 ip.ip_off = htons(df ? IP_DF : 0); 725 ip.ip_ttl = ttl; 726 ip.ip_p = IPPROTO_ICMP; 727 ip.ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY; 728 ip.ip_dst = to->sin_addr; 729 memcpy(outpackhdr, &ip, sizeof(ip)); 730 } 731 732#ifndef __HAIKU__ 733 /* 734 * Here we enter capability mode. Further down access to global 735 * namespaces (e.g filesystem) is restricted (see capsicum(4)). 736 * We must connect(2) our socket before this point. 737 */ 738 caph_cache_catpages(); 739 if (caph_enter_casper() < 0) 740 err(1, "caph_enter_casper"); 741 742 cap_rights_init(&rights, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT); 743 if (caph_rights_limit(srecv, &rights) < 0) 744 err(1, "cap_rights_limit srecv"); 745 cap_rights_init(&rights, CAP_SEND, CAP_SETSOCKOPT); 746 if (caph_rights_limit(ssend, &rights) < 0) 747 err(1, "cap_rights_limit ssend"); 748#endif 749 750 /* record route option */ 751 if (options & F_RROUTE) { 752#ifdef IP_OPTIONS 753 bzero(rspace, sizeof(rspace)); 754 rspace[IPOPT_OPTVAL] = IPOPT_RR; 755 rspace[IPOPT_OLEN] = sizeof(rspace) - 1; 756 rspace[IPOPT_OFFSET] = IPOPT_MINOFF; 757 rspace[sizeof(rspace) - 1] = IPOPT_EOL; 758 if (setsockopt(ssend, IPPROTO_IP, IP_OPTIONS, rspace, 759 sizeof(rspace)) < 0) 760 err(EX_OSERR, "setsockopt IP_OPTIONS"); 761#else 762 errx(EX_UNAVAILABLE, 763 "record route not available in this implementation"); 764#endif /* IP_OPTIONS */ 765 } 766 767 if (options & F_TTL) { 768 if (setsockopt(ssend, IPPROTO_IP, IP_TTL, &ttl, 769 sizeof(ttl)) < 0) { 770 err(EX_OSERR, "setsockopt IP_TTL"); 771 } 772 } 773 if (options & F_NOLOOP) { 774 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, 775 sizeof(loop)) < 0) { 776 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP"); 777 } 778 } 779 if (options & F_MTTL) { 780 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_TTL, &mttl, 781 sizeof(mttl)) < 0) { 782 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL"); 783 } 784 } 785 if (options & F_MIF) { 786 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr, 787 sizeof(ifaddr)) < 0) { 788 err(EX_OSERR, "setsockopt IP_MULTICAST_IF"); 789 } 790 } 791#ifdef SO_TIMESTAMP 792 { 793 int on = 1; 794 int ts_clock = SO_TS_MONOTONIC; 795 if (setsockopt(srecv, SOL_SOCKET, SO_TIMESTAMP, &on, 796 sizeof(on)) < 0) 797 err(EX_OSERR, "setsockopt SO_TIMESTAMP"); 798 if (setsockopt(srecv, SOL_SOCKET, SO_TS_CLOCK, &ts_clock, 799 sizeof(ts_clock)) < 0) 800 err(EX_OSERR, "setsockopt SO_TS_CLOCK"); 801 } 802#endif 803 if (sweepmax) { 804 if (sweepmin > sweepmax) 805 errx(EX_USAGE, 806 "Maximum packet size must be no less than the minimum packet size"); 807 808 if (sweepmax > maxpayload - TIMEVAL_LEN) 809 errx(EX_USAGE, "Invalid sweep maximum"); 810 811 if (datalen != DEFDATALEN) 812 errx(EX_USAGE, 813 "Packet size and ping sweep are mutually exclusive"); 814 815 if (npackets > 0) { 816 snpackets = npackets; 817 npackets = 0; 818 } else 819 snpackets = 1; 820 datalen = sweepmin; 821 send_len = icmp_len + sweepmin; 822 } 823 if (options & F_SWEEP && !sweepmax) 824 errx(EX_USAGE, "Maximum sweep size must be specified"); 825 826 /* 827 * When pinging the broadcast address, you can get a lot of answers. 828 * Doing something so evil is useful if you are trying to stress the 829 * ethernet, or just want to fill the arp cache to get some stuff for 830 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast 831 * or multicast pings if they wish. 832 */ 833 834 /* 835 * XXX receive buffer needs undetermined space for mbuf overhead 836 * as well. 837 */ 838 hold = IP_MAXPACKET + 128; 839 (void)setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 840 sizeof(hold)); 841 /* CAP_SETSOCKOPT removed */ 842#ifndef __HAIKU__ 843 cap_rights_init(&rights, CAP_RECV, CAP_EVENT); 844 if (caph_rights_limit(srecv, &rights) < 0) 845 err(1, "cap_rights_limit srecv setsockopt"); 846#endif 847 if (uid == 0) 848 (void)setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, (char *)&hold, 849 sizeof(hold)); 850 /* CAP_SETSOCKOPT removed */ 851#ifndef __HAIKU__ 852 cap_rights_init(&rights, CAP_SEND); 853 if (caph_rights_limit(ssend, &rights) < 0) 854 err(1, "cap_rights_limit ssend setsockopt"); 855#endif 856 857 if (to->sin_family == AF_INET) { 858 (void)printf("PING %s (%s)", hostname, 859 inet_ntoa(to->sin_addr)); 860 if (source) 861 (void)printf(" from %s", shostname); 862 if (sweepmax) 863 (void)printf(": (%d ... %d) data bytes\n", 864 sweepmin, sweepmax); 865 else 866 (void)printf(": %d data bytes\n", datalen); 867 868 } else { 869 if (sweepmax) 870 (void)printf("PING %s: (%d ... %d) data bytes\n", 871 hostname, sweepmin, sweepmax); 872 else 873 (void)printf("PING %s: %d data bytes\n", hostname, datalen); 874 } 875 876 /* 877 * Use sigaction() instead of signal() to get unambiguous semantics, 878 * in particular with SA_RESTART not set. 879 */ 880 881 sigemptyset(&si_sa.sa_mask); 882 si_sa.sa_flags = 0; 883 si_sa.sa_handler = onsignal; 884 if (sigaction(SIGINT, &si_sa, 0) == -1) 885 err(EX_OSERR, "sigaction SIGINT"); 886 seenint = 0; 887#ifndef __HAIKU__ 888 if (sigaction(SIGINFO, &si_sa, 0) == -1) 889 err(EX_OSERR, "sigaction SIGINFO"); 890 seeninfo = 0; 891#endif 892 if (alarmtimeout > 0) { 893 if (sigaction(SIGALRM, &si_sa, 0) == -1) 894 err(EX_OSERR, "sigaction SIGALRM"); 895 } 896 897 bzero(&msg, sizeof(msg)); 898 msg.msg_name = (caddr_t)&from; 899 msg.msg_iov = &iov; 900 msg.msg_iovlen = 1; 901#ifdef SO_TIMESTAMP 902 msg.msg_control = (caddr_t)ctrl; 903 msg.msg_controllen = sizeof(ctrl); 904#endif 905 iov.iov_base = packet; 906 iov.iov_len = IP_MAXPACKET; 907 908 if (preload == 0) 909 pinger(); /* send the first ping */ 910 else { 911 if (npackets != 0 && preload > npackets) 912 preload = npackets; 913 while (preload--) /* fire off them quickies */ 914 pinger(); 915 } 916 (void)clock_gettime(CLOCK_MONOTONIC, &last); 917 918 if (options & F_FLOOD) { 919 intvl.tv_sec = 0; 920 intvl.tv_nsec = 10000000; 921 } else { 922 intvl.tv_sec = interval / 1000; 923 intvl.tv_nsec = interval % 1000 * 1000000; 924 } 925 926 almost_done = 0; 927 while (seenint == 0) { 928 struct timespec now, timeout; 929 fd_set rfds; 930 int n; 931 ssize_t cc; 932 933 /* signal handling */ 934 if (seeninfo) { 935 pr_summary(stderr); 936 seeninfo = 0; 937 continue; 938 } 939 if ((unsigned)srecv >= FD_SETSIZE) 940 errx(EX_OSERR, "descriptor too large"); 941 FD_ZERO(&rfds); 942 FD_SET(srecv, &rfds); 943 (void)clock_gettime(CLOCK_MONOTONIC, &now); 944 timespecadd(&last, &intvl, &timeout); 945 timespecsub(&timeout, &now, &timeout); 946 if (timeout.tv_sec < 0) 947 timespecclear(&timeout); 948 949 n = pselect(srecv + 1, &rfds, NULL, NULL, &timeout, NULL); 950 if (n < 0) 951 continue; /* EINTR */ 952 if (n == 1) { 953 struct timespec *tv = NULL; 954#ifdef SO_TIMESTAMP 955 struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg); 956#endif 957 msg.msg_namelen = sizeof(from); 958 if ((cc = recvmsg(srecv, &msg, 0)) < 0) { 959 if (errno == EINTR) 960 continue; 961 warn("recvmsg"); 962 continue; 963 } 964 /* If we have a 0 byte read from recvfrom continue */ 965 if (cc == 0) 966 continue; 967#ifdef SO_TIMESTAMP 968 if (cmsg != NULL && 969 cmsg->cmsg_level == SOL_SOCKET && 970 cmsg->cmsg_type == SCM_TIMESTAMP && 971 cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) { 972 /* Copy to avoid alignment problems: */ 973 memcpy(&now, CMSG_DATA(cmsg), sizeof(now)); 974 tv = &now; 975 } 976#endif 977 if (tv == NULL) { 978 (void)clock_gettime(CLOCK_MONOTONIC, &now); 979 tv = &now; 980 } 981 pr_pack((char *)packet, cc, &from, tv); 982 if ((options & F_ONCE && nreceived) || 983 (npackets && nreceived >= npackets)) 984 break; 985 } 986 if (n == 0 || (options & F_FLOOD)) { 987 if (sweepmax && sntransmitted == snpackets) { 988 if (datalen + sweepincr > sweepmax) 989 break; 990 for (i = 0; i < sweepincr; i++) 991 *datap++ = i; 992 datalen += sweepincr; 993 send_len = icmp_len + datalen; 994 sntransmitted = 0; 995 } 996 if (!npackets || ntransmitted < npackets) 997 pinger(); 998 else { 999 if (almost_done) 1000 break; 1001 almost_done = 1; 1002 /* 1003 * If we're not transmitting any more packets, 1004 * change the timer to wait two round-trip times 1005 * if we've received any packets or (waittime) 1006 * milliseconds if we haven't. 1007 */ 1008 intvl.tv_nsec = 0; 1009 if (nreceived) { 1010 intvl.tv_sec = 2 * tmax / 1000; 1011 if (intvl.tv_sec == 0) 1012 intvl.tv_sec = 1; 1013 } else { 1014 intvl.tv_sec = waittime / 1000; 1015 intvl.tv_nsec = 1016 waittime % 1000 * 1000000; 1017 } 1018 } 1019 (void)clock_gettime(CLOCK_MONOTONIC, &last); 1020 if (ntransmitted - nreceived - 1 > nmissedmax) { 1021 nmissedmax = ntransmitted - nreceived - 1; 1022 if (options & F_MISSED) 1023 (void)write(STDOUT_FILENO, &BBELL, 1); 1024 } 1025 } 1026 } 1027 pr_summary(stdout); 1028 1029 exit(nreceived ? 0 : 2); 1030} 1031 1032/* 1033 * pinger -- 1034 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1035 * will be added on by the kernel. The ID field is our UNIX process ID, 1036 * and the sequence number is an ascending integer. The first TIMEVAL_LEN 1037 * bytes of the data portion are used to hold a UNIX "timespec" struct in 1038 * host byte-order, to compute the round-trip time. 1039 */ 1040static void 1041pinger(void) 1042{ 1043 struct timespec now; 1044 struct tv32 tv32; 1045 struct icmp icp; 1046 int cc, i; 1047 u_char *packet; 1048 1049 packet = outpack; 1050 memcpy(&icp, outpack, ICMP_MINLEN + phdr_len); 1051 icp.icmp_type = icmp_type; 1052 icp.icmp_code = 0; 1053 icp.icmp_cksum = 0; 1054 icp.icmp_seq = htons(ntransmitted); 1055 icp.icmp_id = ident; /* ID */ 1056 1057 CLR(ntransmitted % mx_dup_ck); 1058 1059 if ((options & F_TIME) || timing) { 1060 (void)clock_gettime(CLOCK_MONOTONIC, &now); 1061 /* 1062 * Truncate seconds down to 32 bits in order 1063 * to fit the timestamp within 8 bytes of the 1064 * packet. We're only concerned with 1065 * durations, not absolute times. 1066 */ 1067 tv32.tv32_sec = (uint32_t)htonl(now.tv_sec); 1068 tv32.tv32_nsec = (uint32_t)htonl(now.tv_nsec); 1069 if (options & F_TIME) 1070 icp.icmp_otime = htonl((now.tv_sec % (24*60*60)) 1071 * 1000 + now.tv_nsec / 1000000); 1072 if (timing) 1073 bcopy((void *)&tv32, 1074 (void *)&outpack[ICMP_MINLEN + phdr_len], 1075 sizeof(tv32)); 1076 } 1077 1078 memcpy(outpack, &icp, ICMP_MINLEN + phdr_len); 1079 1080 cc = ICMP_MINLEN + phdr_len + datalen; 1081 1082 /* compute ICMP checksum here */ 1083 icp.icmp_cksum = in_cksum(outpack, cc); 1084 /* Update icmp_cksum in the raw packet data buffer. */ 1085 memcpy(outpack + offsetof(struct icmp, icmp_cksum), &icp.icmp_cksum, 1086 sizeof(icp.icmp_cksum)); 1087 1088 if (options & F_HDRINCL) { 1089 struct ip ip; 1090 1091 cc += sizeof(struct ip); 1092 ip.ip_len = htons(cc); 1093 /* Update ip_len in the raw packet data buffer. */ 1094 memcpy(outpackhdr + offsetof(struct ip, ip_len), &ip.ip_len, 1095 sizeof(ip.ip_len)); 1096 ip.ip_sum = in_cksum(outpackhdr, cc); 1097 /* Update ip_sum in the raw packet data buffer. */ 1098 memcpy(outpackhdr + offsetof(struct ip, ip_sum), &ip.ip_sum, 1099 sizeof(ip.ip_sum)); 1100 packet = outpackhdr; 1101 } 1102 i = send(ssend, (char *)packet, cc, 0); 1103 if (i < 0 || i != cc) { 1104 if (i < 0) { 1105 if (options & F_FLOOD && errno == ENOBUFS) { 1106 usleep(FLOOD_BACKOFF); 1107 return; 1108 } 1109 warn("sendto"); 1110 } else { 1111 warn("%s: partial write: %d of %d bytes", 1112 hostname, i, cc); 1113 } 1114 } 1115 ntransmitted++; 1116 sntransmitted++; 1117 if (!(options & F_QUIET) && options & F_DOT) 1118 (void)write(STDOUT_FILENO, &DOT[DOTidx++ % DOTlen], 1); 1119} 1120 1121/* 1122 * pr_pack -- 1123 * Print out the packet, if it came from us. This logic is necessary 1124 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1125 * which arrive ('tis only fair). This permits multiple copies of this 1126 * program to be run without having intermingled output (or statistics!). 1127 */ 1128static void 1129pr_pack(char *buf, ssize_t cc, struct sockaddr_in *from, struct timespec *tv) 1130{ 1131 struct in_addr ina; 1132 u_char *cp, *dp, l; 1133 struct icmp icp; 1134 struct ip ip; 1135 const u_char *icmp_data_raw; 1136 ssize_t icmp_data_raw_len; 1137 double triptime; 1138 int dupflag, i, j, recv_len; 1139 int8_t hlen; 1140 uint16_t seq; 1141 static int old_rrlen; 1142 static char old_rr[MAX_IPOPTLEN]; 1143 struct ip oip; 1144 u_char oip_header_len; 1145 struct icmp oicmp; 1146 const u_char *oicmp_raw; 1147 1148 /* 1149 * Get size of IP header of the received packet. 1150 * The header length is contained in the lower four bits of the first 1151 * byte and represents the number of 4 byte octets the header takes up. 1152 * 1153 * The IHL minimum value is 5 (20 bytes) and its maximum value is 15 1154 * (60 bytes). 1155 */ 1156 memcpy(&l, buf, sizeof(l)); 1157 hlen = (l & 0x0f) << 2; 1158 1159 /* Reject IP packets with a short header */ 1160 if (hlen < (int8_t) sizeof(struct ip)) { 1161 if (options & F_VERBOSE) 1162 warn("IHL too short (%d bytes) from %s", hlen, 1163 inet_ntoa(from->sin_addr)); 1164 return; 1165 } 1166 1167 memcpy(&ip, buf, sizeof(struct ip)); 1168 1169 /* Check packet has enough data to carry a valid ICMP header */ 1170 recv_len = cc; 1171 if (cc < hlen + ICMP_MINLEN) { 1172 if (options & F_VERBOSE) 1173 warn("packet too short (%zd bytes) from %s", cc, 1174 inet_ntoa(from->sin_addr)); 1175 return; 1176 } 1177 1178 icmp_data_raw_len = cc - (hlen + offsetof(struct icmp, icmp_data)); 1179 icmp_data_raw = buf + hlen + offsetof(struct icmp, icmp_data); 1180 1181 /* Now the ICMP part */ 1182 cc -= hlen; 1183 memcpy(&icp, buf + hlen, MIN((ssize_t)sizeof(icp), cc)); 1184 if (icp.icmp_type == icmp_type_rsp) { 1185 if (icp.icmp_id != ident) 1186 return; /* 'Twas not our ECHO */ 1187 ++nreceived; 1188 triptime = 0.0; 1189 if (timing) { 1190 struct timespec tv1; 1191 struct tv32 tv32; 1192 const u_char *tp; 1193 1194 tp = icmp_data_raw + phdr_len; 1195 1196 if ((size_t)(cc - ICMP_MINLEN - phdr_len) >= 1197 sizeof(tv1)) { 1198 /* Copy to avoid alignment problems: */ 1199 memcpy(&tv32, tp, sizeof(tv32)); 1200 tv1.tv_sec = ntohl(tv32.tv32_sec); 1201 tv1.tv_nsec = ntohl(tv32.tv32_nsec); 1202 timespecsub(tv, &tv1, tv); 1203 triptime = ((double)tv->tv_sec) * 1000.0 + 1204 ((double)tv->tv_nsec) / 1000000.0; 1205 if (triptime < 0) { 1206 warnx("time of day goes back (%.3f ms)," 1207 " clamping time to 0", 1208 triptime); 1209 triptime = 0; 1210 } 1211 tsum += triptime; 1212 tsumsq += triptime * triptime; 1213 if (triptime < tmin) 1214 tmin = triptime; 1215 if (triptime > tmax) 1216 tmax = triptime; 1217 } else 1218 timing = 0; 1219 } 1220 1221 seq = ntohs(icp.icmp_seq); 1222 1223 if (TST(seq % mx_dup_ck)) { 1224 ++nrepeats; 1225 --nreceived; 1226 dupflag = 1; 1227 } else { 1228 SET(seq % mx_dup_ck); 1229 dupflag = 0; 1230 } 1231 1232 if (options & F_QUIET) 1233 return; 1234 1235 if (options & F_WAITTIME && triptime > waittime) { 1236 ++nrcvtimeout; 1237 return; 1238 } 1239 1240 if (options & F_DOT) 1241 (void)write(STDOUT_FILENO, &BSPACE, 1); 1242 else { 1243 (void)printf("%zd bytes from %s: icmp_seq=%u", cc, 1244 pr_addr(from->sin_addr), seq); 1245 (void)printf(" ttl=%d", ip.ip_ttl); 1246 if (timing) 1247 (void)printf(" time=%.3f ms", triptime); 1248 if (dupflag) 1249 (void)printf(" (DUP!)"); 1250 if (options & F_AUDIBLE) 1251 (void)write(STDOUT_FILENO, &BBELL, 1); 1252 if (options & F_MASK) { 1253 /* Just prentend this cast isn't ugly */ 1254 (void)printf(" mask=%s", 1255 inet_ntoa(*(struct in_addr *)&(icp.icmp_mask))); 1256 } 1257 if (options & F_TIME) { 1258 (void)printf(" tso=%s", pr_ntime(icp.icmp_otime)); 1259 (void)printf(" tsr=%s", pr_ntime(icp.icmp_rtime)); 1260 (void)printf(" tst=%s", pr_ntime(icp.icmp_ttime)); 1261 } 1262 if (recv_len != send_len) { 1263 (void)printf( 1264 "\nwrong total length %d instead of %d", 1265 recv_len, send_len); 1266 } 1267 /* check the data */ 1268 cp = (u_char*)(buf + hlen + offsetof(struct icmp, 1269 icmp_data) + phdr_len); 1270 dp = &outpack[ICMP_MINLEN + phdr_len]; 1271 cc -= ICMP_MINLEN + phdr_len; 1272 i = 0; 1273 if (timing) { /* don't check variable timestamp */ 1274 cp += TIMEVAL_LEN; 1275 dp += TIMEVAL_LEN; 1276 cc -= TIMEVAL_LEN; 1277 i += TIMEVAL_LEN; 1278 } 1279 for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) { 1280 if (*cp != *dp) { 1281 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", 1282 i, *dp, *cp); 1283 (void)printf("\ncp:"); 1284 cp = (u_char*)(buf + hlen + 1285 offsetof(struct icmp, icmp_data)); 1286 for (i = 0; i < datalen; ++i, ++cp) { 1287 if ((i % 16) == 8) 1288 (void)printf("\n\t"); 1289 (void)printf(" %2x", *cp); 1290 } 1291 (void)printf("\ndp:"); 1292 cp = &outpack[ICMP_MINLEN]; 1293 for (i = 0; i < datalen; ++i, ++cp) { 1294 if ((i % 16) == 8) 1295 (void)printf("\n\t"); 1296 (void)printf(" %2x", *cp); 1297 } 1298 break; 1299 } 1300 } 1301 } 1302 } else { 1303 /* 1304 * We've got something other than an ECHOREPLY. 1305 * See if it's a reply to something that we sent. 1306 * We can compare IP destination, protocol, 1307 * and ICMP type and ID. 1308 * 1309 * Only print all the error messages if we are running 1310 * as root to avoid leaking information not normally 1311 * available to those not running as root. 1312 */ 1313 1314 /* 1315 * If we don't have enough bytes for a quoted IP header and an 1316 * ICMP header then stop. 1317 */ 1318 if (icmp_data_raw_len < 1319 (ssize_t)(sizeof(struct ip) + sizeof(struct icmp))) { 1320 if (options & F_VERBOSE) 1321 warnx("quoted data too short (%zd bytes) from %s", 1322 icmp_data_raw_len, inet_ntoa(from->sin_addr)); 1323 return; 1324 } 1325 1326 memcpy(&oip_header_len, icmp_data_raw, sizeof(oip_header_len)); 1327 oip_header_len = (oip_header_len & 0x0f) << 2; 1328 1329 /* Reject IP packets with a short header */ 1330 if (oip_header_len < sizeof(struct ip)) { 1331 if (options & F_VERBOSE) 1332 warnx("inner IHL too short (%d bytes) from %s", 1333 oip_header_len, inet_ntoa(from->sin_addr)); 1334 return; 1335 } 1336 1337 /* 1338 * Check against the actual IHL length, to protect against 1339 * quoated packets carrying IP options. 1340 */ 1341 if (icmp_data_raw_len < 1342 (ssize_t)(oip_header_len + sizeof(struct icmp))) { 1343 if (options & F_VERBOSE) 1344 warnx("inner packet too short (%zd bytes) from %s", 1345 icmp_data_raw_len, inet_ntoa(from->sin_addr)); 1346 return; 1347 } 1348 1349 memcpy(&oip, icmp_data_raw, sizeof(struct ip)); 1350 oicmp_raw = icmp_data_raw + oip_header_len; 1351 memcpy(&oicmp, oicmp_raw, sizeof(struct icmp)); 1352 1353 if (((options & F_VERBOSE) && uid == 0) || 1354 (!(options & F_QUIET2) && 1355 (oip.ip_dst.s_addr == whereto.sin_addr.s_addr) && 1356 (oip.ip_p == IPPROTO_ICMP) && 1357 (oicmp.icmp_type == ICMP_ECHO) && 1358 (oicmp.icmp_id == ident))) { 1359 (void)printf("%zd bytes from %s: ", cc, 1360 pr_addr(from->sin_addr)); 1361 pr_icmph(&icp, &oip, icmp_data_raw); 1362 } else 1363 return; 1364 } 1365 1366 /* Display any IP options */ 1367 cp = (u_char *)buf + sizeof(struct ip); 1368 1369 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp) 1370 switch (*cp) { 1371 case IPOPT_EOL: 1372 hlen = 0; 1373 break; 1374 case IPOPT_LSRR: 1375 case IPOPT_SSRR: 1376 (void)printf(*cp == IPOPT_LSRR ? 1377 "\nLSRR: " : "\nSSRR: "); 1378 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1; 1379 hlen -= 2; 1380 cp += 2; 1381 if (j >= INADDR_LEN && 1382 j <= hlen - (int)sizeof(struct ip)) { 1383 for (;;) { 1384 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1385 if (ina.s_addr == 0) 1386 (void)printf("\t0.0.0.0"); 1387 else 1388 (void)printf("\t%s", 1389 pr_addr(ina)); 1390 hlen -= INADDR_LEN; 1391 cp += INADDR_LEN - 1; 1392 j -= INADDR_LEN; 1393 if (j < INADDR_LEN) 1394 break; 1395 (void)putchar('\n'); 1396 } 1397 } else 1398 (void)printf("\t(truncated route)"); 1399 break; 1400 case IPOPT_RR: 1401 j = cp[IPOPT_OLEN]; /* get length */ 1402 i = cp[IPOPT_OFFSET]; /* and pointer */ 1403 hlen -= 2; 1404 cp += 2; 1405 if (i > j) 1406 i = j; 1407 i = i - IPOPT_MINOFF + 1; 1408 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) { 1409 old_rrlen = 0; 1410 continue; 1411 } 1412 if (i == old_rrlen 1413 && !bcmp((char *)cp, old_rr, i) 1414 && !(options & F_DOT)) { 1415 (void)printf("\t(same route)"); 1416 hlen -= i; 1417 cp += i; 1418 break; 1419 } 1420 old_rrlen = i; 1421 bcopy((char *)cp, old_rr, i); 1422 (void)printf("\nRR: "); 1423 if (i >= INADDR_LEN && 1424 i <= hlen - (int)sizeof(struct ip)) { 1425 for (;;) { 1426 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1427 if (ina.s_addr == 0) 1428 (void)printf("\t0.0.0.0"); 1429 else 1430 (void)printf("\t%s", 1431 pr_addr(ina)); 1432 hlen -= INADDR_LEN; 1433 cp += INADDR_LEN - 1; 1434 i -= INADDR_LEN; 1435 if (i < INADDR_LEN) 1436 break; 1437 (void)putchar('\n'); 1438 } 1439 } else 1440 (void)printf("\t(truncated route)"); 1441 break; 1442 case IPOPT_NOP: 1443 (void)printf("\nNOP"); 1444 break; 1445 default: 1446 (void)printf("\nunknown option %x", *cp); 1447 break; 1448 } 1449 if (!(options & F_DOT)) { 1450 (void)putchar('\n'); 1451 (void)fflush(stdout); 1452 } 1453} 1454 1455/* 1456 * pr_icmph -- 1457 * Print a descriptive string about an ICMP header. 1458 */ 1459static void 1460pr_icmph(struct icmp *icp, struct ip *oip, const u_char *const oicmp_raw) 1461{ 1462 1463 switch(icp->icmp_type) { 1464 case ICMP_ECHOREPLY: 1465 (void)printf("Echo Reply\n"); 1466 /* XXX ID + Seq + Data */ 1467 break; 1468 case ICMP_UNREACH: 1469 switch(icp->icmp_code) { 1470 case ICMP_UNREACH_NET: 1471 (void)printf("Destination Net Unreachable\n"); 1472 break; 1473 case ICMP_UNREACH_HOST: 1474 (void)printf("Destination Host Unreachable\n"); 1475 break; 1476 case ICMP_UNREACH_PROTOCOL: 1477 (void)printf("Destination Protocol Unreachable\n"); 1478 break; 1479 case ICMP_UNREACH_PORT: 1480 (void)printf("Destination Port Unreachable\n"); 1481 break; 1482 case ICMP_UNREACH_NEEDFRAG: 1483 (void)printf("frag needed and DF set (MTU %d)\n", 1484 ntohs(icp->icmp_nextmtu)); 1485 break; 1486 case ICMP_UNREACH_SRCFAIL: 1487 (void)printf("Source Route Failed\n"); 1488 break; 1489 case ICMP_UNREACH_FILTER_PROHIB: 1490 (void)printf("Communication prohibited by filter\n"); 1491 break; 1492 default: 1493 (void)printf("Dest Unreachable, Bad Code: %d\n", 1494 icp->icmp_code); 1495 break; 1496 } 1497 /* Print returned IP header information */ 1498 pr_iph(oip, oicmp_raw); 1499 break; 1500 case ICMP_SOURCEQUENCH: 1501 (void)printf("Source Quench\n"); 1502 pr_iph(oip, oicmp_raw); 1503 break; 1504 case ICMP_REDIRECT: 1505 switch(icp->icmp_code) { 1506 case ICMP_REDIRECT_NET: 1507 (void)printf("Redirect Network"); 1508 break; 1509 case ICMP_REDIRECT_HOST: 1510 (void)printf("Redirect Host"); 1511 break; 1512 case ICMP_REDIRECT_TOSNET: 1513 (void)printf("Redirect Type of Service and Network"); 1514 break; 1515 case ICMP_REDIRECT_TOSHOST: 1516 (void)printf("Redirect Type of Service and Host"); 1517 break; 1518 default: 1519 (void)printf("Redirect, Bad Code: %d", icp->icmp_code); 1520 break; 1521 } 1522 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr)); 1523 pr_iph(oip, oicmp_raw); 1524 break; 1525 case ICMP_ECHO: 1526 (void)printf("Echo Request\n"); 1527 /* XXX ID + Seq + Data */ 1528 break; 1529 case ICMP_TIMXCEED: 1530 switch(icp->icmp_code) { 1531 case ICMP_TIMXCEED_INTRANS: 1532 (void)printf("Time to live exceeded\n"); 1533 break; 1534 case ICMP_TIMXCEED_REASS: 1535 (void)printf("Frag reassembly time exceeded\n"); 1536 break; 1537 default: 1538 (void)printf("Time exceeded, Bad Code: %d\n", 1539 icp->icmp_code); 1540 break; 1541 } 1542 pr_iph(oip, oicmp_raw); 1543 break; 1544 case ICMP_PARAMPROB: 1545 (void)printf("Parameter problem: pointer = 0x%02x\n", 1546 icp->icmp_hun.ih_pptr); 1547 pr_iph(oip, oicmp_raw); 1548 break; 1549 case ICMP_TSTAMP: 1550 (void)printf("Timestamp\n"); 1551 /* XXX ID + Seq + 3 timestamps */ 1552 break; 1553 case ICMP_TSTAMPREPLY: 1554 (void)printf("Timestamp Reply\n"); 1555 /* XXX ID + Seq + 3 timestamps */ 1556 break; 1557 case ICMP_IREQ: 1558 (void)printf("Information Request\n"); 1559 /* XXX ID + Seq */ 1560 break; 1561 case ICMP_IREQREPLY: 1562 (void)printf("Information Reply\n"); 1563 /* XXX ID + Seq */ 1564 break; 1565 case ICMP_MASKREQ: 1566 (void)printf("Address Mask Request\n"); 1567 break; 1568 case ICMP_MASKREPLY: 1569 (void)printf("Address Mask Reply\n"); 1570 break; 1571 case ICMP_ROUTERADVERT: 1572 (void)printf("Router Advertisement\n"); 1573 break; 1574 case ICMP_ROUTERSOLICIT: 1575 (void)printf("Router Solicitation\n"); 1576 break; 1577 default: 1578 (void)printf("Bad ICMP type: %d\n", icp->icmp_type); 1579 } 1580} 1581 1582/* 1583 * pr_iph -- 1584 * Print an IP header with options. 1585 */ 1586static void 1587pr_iph(struct ip *ip, const u_char *cp) 1588{ 1589 struct in_addr dst_ina, src_ina; 1590 int hlen; 1591 1592 hlen = ip->ip_hl << 2; 1593 cp = cp + sizeof(struct ip); /* point to options */ 1594 1595 memcpy(&src_ina, &ip->ip_src.s_addr, sizeof(src_ina)); 1596 memcpy(&dst_ina, &ip->ip_dst.s_addr, sizeof(dst_ina)); 1597 1598 (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks %*s %*s", 1599 (int)strlen(inet_ntoa(src_ina)), "Src", 1600 (int)strlen(inet_ntoa(dst_ina)), "Dst"); 1601 if (hlen > (int)sizeof(struct ip)) 1602 (void)printf(" Opts"); 1603 (void)putchar('\n'); 1604 (void)printf(" %1x %1x %02x %04x %04x", 1605 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len), 1606 ntohs(ip->ip_id)); 1607 (void)printf(" %1x %04x", 1608 (ntohs(ip->ip_off) & 0xe000) >> 13, 1609 ntohs(ip->ip_off) & 0x1fff); 1610 (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, 1611 ntohs(ip->ip_sum)); 1612 (void)printf(" %s", inet_ntoa(src_ina)); 1613 (void)printf(" %s", inet_ntoa(dst_ina)); 1614 /* dump any option bytes */ 1615 if (hlen > (int)sizeof(struct ip)) { 1616 (void)printf(" "); 1617 while (hlen-- > (int)sizeof(struct ip)) { 1618 (void)printf("%02x", *cp++); 1619 } 1620 } 1621 (void)putchar('\n'); 1622} 1623 1624/* 1625 * pr_addr -- 1626 * Return an ascii host address as a dotted quad and optionally with 1627 * a hostname. 1628 */ 1629static char * 1630pr_addr(struct in_addr ina) 1631{ 1632 struct hostent *hp; 1633 static char buf[16 + 3 + MAXHOSTNAMELEN]; 1634 1635 if (!(options & F_HOSTNAME)) 1636 return inet_ntoa(ina); 1637 1638#ifdef __HAIKU__ 1639#define cap_gethostbyaddr(w, x, y, z) gethostbyaddr(x, y, z) 1640#endif 1641 hp = cap_gethostbyaddr(capdns, (char *)&ina, sizeof(ina), AF_INET); 1642 1643 if (hp == NULL) 1644 return inet_ntoa(ina); 1645 1646 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1647 inet_ntoa(ina)); 1648 return(buf); 1649} 1650 1651static char * 1652pr_ntime(n_time timestamp) 1653{ 1654 static char buf[11]; 1655 int hour, min, sec; 1656 1657 sec = ntohl(timestamp) / 1000; 1658 hour = sec / 60 / 60; 1659 min = (sec % (60 * 60)) / 60; 1660 sec = (sec % (60 * 60)) % 60; 1661 1662 (void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec); 1663 1664 return (buf); 1665} 1666 1667static void 1668fill(char *bp, char *patp) 1669{ 1670 char *cp; 1671 int pat[16]; 1672 u_int ii, jj, kk; 1673 1674 for (cp = patp; *cp; cp++) { 1675 if (!isxdigit(*cp)) 1676 errx(EX_USAGE, 1677 "patterns must be specified as hex digits"); 1678 1679 } 1680 ii = sscanf(patp, 1681 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1682 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 1683 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 1684 &pat[13], &pat[14], &pat[15]); 1685 1686 if (ii > 0) 1687 for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii) 1688 for (jj = 0; jj < ii; ++jj) 1689 bp[jj + kk] = pat[jj]; 1690 if (!(options & F_QUIET)) { 1691 (void)printf("PATTERN: 0x"); 1692 for (jj = 0; jj < ii; ++jj) 1693 (void)printf("%02x", bp[jj] & 0xFF); 1694 (void)printf("\n"); 1695 } 1696} 1697 1698#ifndef __HAIKU__ 1699static cap_channel_t * 1700capdns_setup(void) 1701{ 1702 cap_channel_t *capcas, *capdnsloc; 1703#ifdef WITH_CASPER 1704 const char *types[2]; 1705 int families[1]; 1706#endif 1707 capcas = cap_init(); 1708 if (capcas == NULL) 1709 err(1, "unable to create casper process"); 1710 capdnsloc = cap_service_open(capcas, "system.dns"); 1711 /* Casper capability no longer needed. */ 1712 cap_close(capcas); 1713 if (capdnsloc == NULL) 1714 err(1, "unable to open system.dns service"); 1715#ifdef WITH_CASPER 1716 types[0] = "NAME2ADDR"; 1717 types[1] = "ADDR2NAME"; 1718 if (cap_dns_type_limit(capdnsloc, types, 2) < 0) 1719 err(1, "unable to limit access to system.dns service"); 1720 families[0] = AF_INET; 1721 if (cap_dns_family_limit(capdnsloc, families, 1) < 0) 1722 err(1, "unable to limit access to system.dns service"); 1723#endif 1724 return (capdnsloc); 1725} 1726#endif 1727