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 <stddef.h> 95 #include <signal.h> 96 #include <stdio.h> 97 #include <stdlib.h> 98 #include <string.h> 99 #include <sysexits.h> 100 #include <time.h> 101 #include <unistd.h> 102 103 #include "utils.h" 104 105 #define INADDR_LEN ((int)sizeof(in_addr_t)) 106 #define TIMEVAL_LEN ((int)sizeof(struct tv32)) 107 #define MASK_LEN (ICMP_MASKLEN - ICMP_MINLEN) 108 #define TS_LEN (ICMP_TSLEN - ICMP_MINLEN) 109 #define DEFDATALEN 56 /* default data length */ 110 #define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */ 111 /* runs out of buffer space */ 112 #define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN) 113 #define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN) 114 #define MAXWAIT 10000 /* max ms to wait for response */ 115 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */ 116 #define MAXTOS 255 117 118 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 119 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 120 #define SET(bit) (A(bit) |= B(bit)) 121 #define CLR(bit) (A(bit) &= (~B(bit))) 122 #define TST(bit) (A(bit) & B(bit)) 123 124 struct tv32 { 125 int32_t tv32_sec; 126 int32_t tv32_nsec; 127 }; 128 129 /* various options */ 130 static int options; 131 #define F_FLOOD 0x0001 132 #define F_INTERVAL 0x0002 133 #define F_NUMERIC 0x0004 134 #define F_PINGFILLED 0x0008 135 #define F_QUIET 0x0010 136 #define F_RROUTE 0x0020 137 #define F_SO_DEBUG 0x0040 138 #define F_SO_DONTROUTE 0x0080 139 #define F_VERBOSE 0x0100 140 #define F_QUIET2 0x0200 141 #define F_NOLOOP 0x0400 142 #define F_MTTL 0x0800 143 #define F_MIF 0x1000 144 #define F_AUDIBLE 0x2000 145 #ifdef IPSEC 146 #ifdef IPSEC_POLICY_IPSEC 147 #define F_POLICY 0x4000 148 #endif /*IPSEC_POLICY_IPSEC*/ 149 #endif /*IPSEC*/ 150 #define F_TTL 0x8000 151 #define F_MISSED 0x10000 152 #define F_ONCE 0x20000 153 #define F_HDRINCL 0x40000 154 #define F_MASK 0x80000 155 #define F_TIME 0x100000 156 #define F_SWEEP 0x200000 157 #define F_WAITTIME 0x400000 158 159 /* 160 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 161 * number of received sequence numbers we can keep track of. Change 128 162 * to 8192 for complete accuracy... 163 */ 164 #define MAX_DUP_CHK (8 * 128) 165 static int mx_dup_ck = MAX_DUP_CHK; 166 static char rcvd_tbl[MAX_DUP_CHK / 8]; 167 168 static struct sockaddr_in whereto; /* who to ping */ 169 static int datalen = DEFDATALEN; 170 static int maxpayload; 171 static int ssend; /* send socket file descriptor */ 172 static int srecv; /* receive socket file descriptor */ 173 static u_char outpackhdr[IP_MAXPACKET], *outpack; 174 static char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */ 175 static char BSPACE = '\b'; /* characters written for flood */ 176 static char DOT = '.'; 177 static char *hostname; 178 static char *shostname; 179 static int ident; /* process id to identify our packets */ 180 static int uid; /* cached uid for micro-optimization */ 181 static u_char icmp_type = ICMP_ECHO; 182 static u_char icmp_type_rsp = ICMP_ECHOREPLY; 183 static int phdr_len = 0; 184 static int send_len; 185 186 /* counters */ 187 static long nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 188 static long npackets; /* max packets to transmit */ 189 static long nreceived; /* # of packets we got back */ 190 static long nrepeats; /* number of duplicates */ 191 static long ntransmitted; /* sequence # for outbound packets = #sent */ 192 static long snpackets; /* max packets to transmit in one sweep */ 193 static long sntransmitted; /* # of packets we sent in this sweep */ 194 static int sweepmax; /* max value of payload in sweep */ 195 static int sweepmin = 0; /* start value of payload in sweep */ 196 static int sweepincr = 1; /* payload increment in sweep */ 197 static int interval = 1000; /* interval between packets, ms */ 198 static int waittime = MAXWAIT; /* timeout for each packet */ 199 static long nrcvtimeout = 0; /* # of packets we got back after waittime */ 200 201 /* timing */ 202 static int timing; /* flag to do timing */ 203 static double tmin = 999999999.0; /* minimum round trip time */ 204 static double tmax = 0.0; /* maximum round trip time */ 205 static double tsum = 0.0; /* sum of all times, for doing average */ 206 static double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 207 208 /* nonzero if we've been told to finish up */ 209 static volatile sig_atomic_t finish_up; 210 static volatile sig_atomic_t siginfo_p; 211 212 static cap_channel_t *capdns; 213 214 static void fill(char *, char *); 215 static cap_channel_t *capdns_setup(void); 216 static void check_status(void); 217 static void finish(void) __dead2; 218 static void pinger(void); 219 static char *pr_addr(struct in_addr); 220 static char *pr_ntime(n_time); 221 static void pr_icmph(struct icmp *, struct ip *, const u_char *const); 222 static void pr_iph(struct ip *); 223 static void pr_pack(char *, ssize_t, struct sockaddr_in *, struct timespec *); 224 static void pr_retip(struct ip *, const u_char *); 225 static void status(int); 226 static void stopit(int); 227 static void usage(void) __dead2; 228 229 int 230 main(int argc, char *const *argv) 231 { 232 struct sockaddr_in from, sock_in; 233 struct in_addr ifaddr; 234 struct timespec last, intvl; 235 struct iovec iov; 236 struct msghdr msg; 237 struct sigaction si_sa; 238 size_t sz; 239 u_char *datap, packet[IP_MAXPACKET] __aligned(4); 240 char *ep, *source, *target, *payload; 241 struct hostent *hp; 242 #ifdef IPSEC_POLICY_IPSEC 243 char *policy_in, *policy_out; 244 #endif 245 struct sockaddr_in *to; 246 double t; 247 u_long alarmtimeout; 248 long ltmp; 249 int almost_done, ch, df, hold, i, icmp_len, mib[4], preload; 250 int ssend_errno, srecv_errno, tos, ttl; 251 char ctrl[CMSG_SPACE(sizeof(struct timespec))]; 252 char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN]; 253 #ifdef IP_OPTIONS 254 char rspace[MAX_IPOPTLEN]; /* record route space */ 255 #endif 256 unsigned char loop, mttl; 257 258 payload = source = NULL; 259 #ifdef IPSEC_POLICY_IPSEC 260 policy_in = policy_out = NULL; 261 #endif 262 cap_rights_t rights; 263 264 options |= F_NUMERIC; 265 266 /* 267 * Do the stuff that we need root priv's for *first*, and 268 * then drop our setuid bit. Save error reporting for 269 * after arg parsing. 270 * 271 * Historicaly ping was using one socket 's' for sending and for 272 * receiving. After capsicum(4) related changes we use two 273 * sockets. It was done for special ping use case - when user 274 * issue ping on multicast or broadcast address replies come 275 * from different addresses, not from the address we 276 * connect(2)'ed to, and send socket do not receive those 277 * packets. 278 */ 279 ssend = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 280 ssend_errno = errno; 281 srecv = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 282 srecv_errno = errno; 283 284 if (setuid(getuid()) != 0) 285 err(EX_NOPERM, "setuid() failed"); 286 uid = getuid(); 287 288 if (ssend < 0) { 289 errno = ssend_errno; 290 err(EX_OSERR, "ssend socket"); 291 } 292 293 if (srecv < 0) { 294 errno = srecv_errno; 295 err(EX_OSERR, "srecv socket"); 296 } 297 298 alarmtimeout = df = preload = tos = 0; 299 300 outpack = outpackhdr + sizeof(struct ip); 301 while ((ch = getopt(argc, argv, 302 "Aac:DdfG:g:Hh:I:i:Ll:M:m:nop:QqRrS:s:T:t:vW:z:" 303 #ifdef IPSEC 304 #ifdef IPSEC_POLICY_IPSEC 305 "P:" 306 #endif /*IPSEC_POLICY_IPSEC*/ 307 #endif /*IPSEC*/ 308 )) != -1) 309 { 310 switch(ch) { 311 case 'A': 312 options |= F_MISSED; 313 break; 314 case 'a': 315 options |= F_AUDIBLE; 316 break; 317 case 'c': 318 ltmp = strtol(optarg, &ep, 0); 319 if (*ep || ep == optarg || ltmp <= 0) 320 errx(EX_USAGE, 321 "invalid count of packets to transmit: `%s'", 322 optarg); 323 npackets = ltmp; 324 break; 325 case 'D': 326 options |= F_HDRINCL; 327 df = 1; 328 break; 329 case 'd': 330 options |= F_SO_DEBUG; 331 break; 332 case 'f': 333 if (uid) { 334 errno = EPERM; 335 err(EX_NOPERM, "-f flag"); 336 } 337 options |= F_FLOOD; 338 setbuf(stdout, (char *)NULL); 339 break; 340 case 'G': /* Maximum packet size for ping sweep */ 341 ltmp = strtol(optarg, &ep, 0); 342 if (*ep || ep == optarg || ltmp <= 0) 343 errx(EX_USAGE, "invalid packet size: `%s'", 344 optarg); 345 if (uid != 0 && ltmp > DEFDATALEN) { 346 errno = EPERM; 347 err(EX_NOPERM, 348 "packet size too large: %ld > %u", 349 ltmp, DEFDATALEN); 350 } 351 options |= F_SWEEP; 352 sweepmax = ltmp; 353 break; 354 case 'g': /* Minimum packet size for ping sweep */ 355 ltmp = strtol(optarg, &ep, 0); 356 if (*ep || ep == optarg || ltmp <= 0) 357 errx(EX_USAGE, "invalid packet size: `%s'", 358 optarg); 359 if (uid != 0 && ltmp > DEFDATALEN) { 360 errno = EPERM; 361 err(EX_NOPERM, 362 "packet size too large: %ld > %u", 363 ltmp, DEFDATALEN); 364 } 365 options |= F_SWEEP; 366 sweepmin = ltmp; 367 break; 368 case 'H': 369 options &= ~F_NUMERIC; 370 break; 371 case 'h': /* Packet size increment for ping sweep */ 372 ltmp = strtol(optarg, &ep, 0); 373 if (*ep || ep == optarg || ltmp < 1) 374 errx(EX_USAGE, "invalid increment size: `%s'", 375 optarg); 376 if (uid != 0 && ltmp > DEFDATALEN) { 377 errno = EPERM; 378 err(EX_NOPERM, 379 "packet size too large: %ld > %u", 380 ltmp, DEFDATALEN); 381 } 382 options |= F_SWEEP; 383 sweepincr = ltmp; 384 break; 385 case 'I': /* multicast interface */ 386 if (inet_aton(optarg, &ifaddr) == 0) 387 errx(EX_USAGE, 388 "invalid multicast interface: `%s'", 389 optarg); 390 options |= F_MIF; 391 break; 392 case 'i': /* wait between sending packets */ 393 t = strtod(optarg, &ep) * 1000.0; 394 if (*ep || ep == optarg || t > (double)INT_MAX) 395 errx(EX_USAGE, "invalid timing interval: `%s'", 396 optarg); 397 options |= F_INTERVAL; 398 interval = (int)t; 399 if (uid && interval < 1000) { 400 errno = EPERM; 401 err(EX_NOPERM, "-i interval too short"); 402 } 403 break; 404 case 'L': 405 options |= F_NOLOOP; 406 loop = 0; 407 break; 408 case 'l': 409 ltmp = strtol(optarg, &ep, 0); 410 if (*ep || ep == optarg || ltmp > INT_MAX || ltmp < 0) 411 errx(EX_USAGE, 412 "invalid preload value: `%s'", optarg); 413 if (uid) { 414 errno = EPERM; 415 err(EX_NOPERM, "-l flag"); 416 } 417 preload = ltmp; 418 break; 419 case 'M': 420 switch(optarg[0]) { 421 case 'M': 422 case 'm': 423 options |= F_MASK; 424 break; 425 case 'T': 426 case 't': 427 options |= F_TIME; 428 break; 429 default: 430 errx(EX_USAGE, "invalid message: `%c'", optarg[0]); 431 break; 432 } 433 break; 434 case 'm': /* TTL */ 435 ltmp = strtol(optarg, &ep, 0); 436 if (*ep || ep == optarg || ltmp > MAXTTL || ltmp < 0) 437 errx(EX_USAGE, "invalid TTL: `%s'", optarg); 438 ttl = ltmp; 439 options |= F_TTL; 440 break; 441 case 'n': 442 options |= F_NUMERIC; 443 break; 444 case 'o': 445 options |= F_ONCE; 446 break; 447 #ifdef IPSEC 448 #ifdef IPSEC_POLICY_IPSEC 449 case 'P': 450 options |= F_POLICY; 451 if (!strncmp("in", optarg, 2)) 452 policy_in = strdup(optarg); 453 else if (!strncmp("out", optarg, 3)) 454 policy_out = strdup(optarg); 455 else 456 errx(1, "invalid security policy"); 457 break; 458 #endif /*IPSEC_POLICY_IPSEC*/ 459 #endif /*IPSEC*/ 460 case 'p': /* fill buffer with user pattern */ 461 options |= F_PINGFILLED; 462 payload = optarg; 463 break; 464 case 'Q': 465 options |= F_QUIET2; 466 break; 467 case 'q': 468 options |= F_QUIET; 469 break; 470 case 'R': 471 options |= F_RROUTE; 472 break; 473 case 'r': 474 options |= F_SO_DONTROUTE; 475 break; 476 case 'S': 477 source = optarg; 478 break; 479 case 's': /* size of packet to send */ 480 ltmp = strtol(optarg, &ep, 0); 481 if (*ep || ep == optarg || ltmp < 0) 482 errx(EX_USAGE, "invalid packet size: `%s'", 483 optarg); 484 if (uid != 0 && ltmp > DEFDATALEN) { 485 errno = EPERM; 486 err(EX_NOPERM, 487 "packet size too large: %ld > %u", 488 ltmp, DEFDATALEN); 489 } 490 datalen = ltmp; 491 break; 492 case 'T': /* multicast TTL */ 493 ltmp = strtol(optarg, &ep, 0); 494 if (*ep || ep == optarg || ltmp > MAXTTL || ltmp < 0) 495 errx(EX_USAGE, "invalid multicast TTL: `%s'", 496 optarg); 497 mttl = ltmp; 498 options |= F_MTTL; 499 break; 500 case 't': 501 alarmtimeout = strtoul(optarg, &ep, 0); 502 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 503 errx(EX_USAGE, "invalid timeout: `%s'", 504 optarg); 505 if (alarmtimeout > MAXALARM) 506 errx(EX_USAGE, "invalid timeout: `%s' > %d", 507 optarg, MAXALARM); 508 alarm((int)alarmtimeout); 509 break; 510 case 'v': 511 options |= F_VERBOSE; 512 break; 513 case 'W': /* wait ms for answer */ 514 t = strtod(optarg, &ep); 515 if (*ep || ep == optarg || t > (double)INT_MAX) 516 errx(EX_USAGE, "invalid timing interval: `%s'", 517 optarg); 518 options |= F_WAITTIME; 519 waittime = (int)t; 520 break; 521 case 'z': 522 options |= F_HDRINCL; 523 ltmp = strtol(optarg, &ep, 0); 524 if (*ep || ep == optarg || ltmp > MAXTOS || ltmp < 0) 525 errx(EX_USAGE, "invalid TOS: `%s'", optarg); 526 tos = ltmp; 527 break; 528 default: 529 usage(); 530 } 531 } 532 533 if (argc - optind != 1) 534 usage(); 535 target = argv[optind]; 536 537 switch (options & (F_MASK|F_TIME)) { 538 case 0: break; 539 case F_MASK: 540 icmp_type = ICMP_MASKREQ; 541 icmp_type_rsp = ICMP_MASKREPLY; 542 phdr_len = MASK_LEN; 543 if (!(options & F_QUIET)) 544 (void)printf("ICMP_MASKREQ\n"); 545 break; 546 case F_TIME: 547 icmp_type = ICMP_TSTAMP; 548 icmp_type_rsp = ICMP_TSTAMPREPLY; 549 phdr_len = TS_LEN; 550 if (!(options & F_QUIET)) 551 (void)printf("ICMP_TSTAMP\n"); 552 break; 553 default: 554 errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive."); 555 break; 556 } 557 icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len; 558 if (options & F_RROUTE) 559 icmp_len += MAX_IPOPTLEN; 560 maxpayload = IP_MAXPACKET - icmp_len; 561 if (datalen > maxpayload) 562 errx(EX_USAGE, "packet size too large: %d > %d", datalen, 563 maxpayload); 564 send_len = icmp_len + datalen; 565 datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN]; 566 if (options & F_PINGFILLED) { 567 fill((char *)datap, payload); 568 } 569 capdns = capdns_setup(); 570 if (source) { 571 bzero((char *)&sock_in, sizeof(sock_in)); 572 sock_in.sin_family = AF_INET; 573 if (inet_aton(source, &sock_in.sin_addr) != 0) { 574 shostname = source; 575 } else { 576 hp = cap_gethostbyname2(capdns, source, AF_INET); 577 if (!hp) 578 errx(EX_NOHOST, "cannot resolve %s: %s", 579 source, hstrerror(h_errno)); 580 581 sock_in.sin_len = sizeof sock_in; 582 if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) || 583 hp->h_length < 0) 584 errx(1, "gethostbyname2: illegal address"); 585 memcpy(&sock_in.sin_addr, hp->h_addr_list[0], 586 sizeof(sock_in.sin_addr)); 587 (void)strncpy(snamebuf, hp->h_name, 588 sizeof(snamebuf) - 1); 589 snamebuf[sizeof(snamebuf) - 1] = '\0'; 590 shostname = snamebuf; 591 } 592 if (bind(ssend, (struct sockaddr *)&sock_in, sizeof sock_in) == 593 -1) 594 err(1, "bind"); 595 } 596 597 bzero(&whereto, sizeof(whereto)); 598 to = &whereto; 599 to->sin_family = AF_INET; 600 to->sin_len = sizeof *to; 601 if (inet_aton(target, &to->sin_addr) != 0) { 602 hostname = target; 603 } else { 604 hp = cap_gethostbyname2(capdns, target, AF_INET); 605 if (!hp) 606 errx(EX_NOHOST, "cannot resolve %s: %s", 607 target, hstrerror(h_errno)); 608 609 if ((unsigned)hp->h_length > sizeof(to->sin_addr)) 610 errx(1, "gethostbyname2 returned an illegal address"); 611 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr); 612 (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1); 613 hnamebuf[sizeof(hnamebuf) - 1] = '\0'; 614 hostname = hnamebuf; 615 } 616 617 /* From now on we will use only reverse DNS lookups. */ 618 #ifdef WITH_CASPER 619 if (capdns != NULL) { 620 const char *types[1]; 621 622 types[0] = "ADDR2NAME"; 623 if (cap_dns_type_limit(capdns, types, 1) < 0) 624 err(1, "unable to limit access to system.dns service"); 625 } 626 #endif 627 if (connect(ssend, (struct sockaddr *)&whereto, sizeof(whereto)) != 0) 628 err(1, "connect"); 629 630 if (options & F_FLOOD && options & F_INTERVAL) 631 errx(EX_USAGE, "-f and -i: incompatible options"); 632 633 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 634 errx(EX_USAGE, 635 "-f flag cannot be used with multicast destination"); 636 if (options & (F_MIF | F_NOLOOP | F_MTTL) 637 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 638 errx(EX_USAGE, 639 "-I, -L, -T flags cannot be used with unicast destination"); 640 641 if (datalen >= TIMEVAL_LEN) /* can we time transfer */ 642 timing = 1; 643 644 if (!(options & F_PINGFILLED)) 645 for (i = TIMEVAL_LEN; i < datalen; ++i) 646 *datap++ = i; 647 648 ident = getpid() & 0xFFFF; 649 650 hold = 1; 651 if (options & F_SO_DEBUG) { 652 (void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold, 653 sizeof(hold)); 654 (void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold, 655 sizeof(hold)); 656 } 657 if (options & F_SO_DONTROUTE) 658 (void)setsockopt(ssend, SOL_SOCKET, SO_DONTROUTE, (char *)&hold, 659 sizeof(hold)); 660 #ifdef IPSEC 661 #ifdef IPSEC_POLICY_IPSEC 662 if (options & F_POLICY) { 663 char *buf; 664 if (policy_in != NULL) { 665 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 666 if (buf == NULL) 667 errx(EX_CONFIG, "%s", ipsec_strerror()); 668 if (setsockopt(srecv, IPPROTO_IP, IP_IPSEC_POLICY, 669 buf, ipsec_get_policylen(buf)) < 0) 670 err(EX_CONFIG, 671 "ipsec policy cannot be configured"); 672 free(buf); 673 } 674 675 if (policy_out != NULL) { 676 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 677 if (buf == NULL) 678 errx(EX_CONFIG, "%s", ipsec_strerror()); 679 if (setsockopt(ssend, IPPROTO_IP, IP_IPSEC_POLICY, 680 buf, ipsec_get_policylen(buf)) < 0) 681 err(EX_CONFIG, 682 "ipsec policy cannot be configured"); 683 free(buf); 684 } 685 } 686 #endif /*IPSEC_POLICY_IPSEC*/ 687 #endif /*IPSEC*/ 688 689 if (options & F_HDRINCL) { 690 struct ip ip; 691 692 memcpy(&ip, outpackhdr, sizeof(ip)); 693 if (!(options & (F_TTL | F_MTTL))) { 694 mib[0] = CTL_NET; 695 mib[1] = PF_INET; 696 mib[2] = IPPROTO_IP; 697 mib[3] = IPCTL_DEFTTL; 698 sz = sizeof(ttl); 699 if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1) 700 err(1, "sysctl(net.inet.ip.ttl)"); 701 } 702 setsockopt(ssend, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold)); 703 ip.ip_v = IPVERSION; 704 ip.ip_hl = sizeof(struct ip) >> 2; 705 ip.ip_tos = tos; 706 ip.ip_id = 0; 707 ip.ip_off = htons(df ? IP_DF : 0); 708 ip.ip_ttl = ttl; 709 ip.ip_p = IPPROTO_ICMP; 710 ip.ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY; 711 ip.ip_dst = to->sin_addr; 712 memcpy(outpackhdr, &ip, sizeof(ip)); 713 } 714 715 /* 716 * Here we enter capability mode. Further down access to global 717 * namespaces (e.g filesystem) is restricted (see capsicum(4)). 718 * We must connect(2) our socket before this point. 719 */ 720 caph_cache_catpages(); 721 if (caph_enter_casper() < 0) 722 err(1, "cap_enter"); 723 724 cap_rights_init(&rights, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT); 725 if (caph_rights_limit(srecv, &rights) < 0) 726 err(1, "cap_rights_limit srecv"); 727 cap_rights_init(&rights, CAP_SEND, CAP_SETSOCKOPT); 728 if (caph_rights_limit(ssend, &rights) < 0) 729 err(1, "cap_rights_limit ssend"); 730 731 /* record route option */ 732 if (options & F_RROUTE) { 733 #ifdef IP_OPTIONS 734 bzero(rspace, sizeof(rspace)); 735 rspace[IPOPT_OPTVAL] = IPOPT_RR; 736 rspace[IPOPT_OLEN] = sizeof(rspace) - 1; 737 rspace[IPOPT_OFFSET] = IPOPT_MINOFF; 738 rspace[sizeof(rspace) - 1] = IPOPT_EOL; 739 if (setsockopt(ssend, IPPROTO_IP, IP_OPTIONS, rspace, 740 sizeof(rspace)) < 0) 741 err(EX_OSERR, "setsockopt IP_OPTIONS"); 742 #else 743 errx(EX_UNAVAILABLE, 744 "record route not available in this implementation"); 745 #endif /* IP_OPTIONS */ 746 } 747 748 if (options & F_TTL) { 749 if (setsockopt(ssend, IPPROTO_IP, IP_TTL, &ttl, 750 sizeof(ttl)) < 0) { 751 err(EX_OSERR, "setsockopt IP_TTL"); 752 } 753 } 754 if (options & F_NOLOOP) { 755 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, 756 sizeof(loop)) < 0) { 757 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP"); 758 } 759 } 760 if (options & F_MTTL) { 761 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_TTL, &mttl, 762 sizeof(mttl)) < 0) { 763 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL"); 764 } 765 } 766 if (options & F_MIF) { 767 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr, 768 sizeof(ifaddr)) < 0) { 769 err(EX_OSERR, "setsockopt IP_MULTICAST_IF"); 770 } 771 } 772 #ifdef SO_TIMESTAMP 773 { 774 int on = 1; 775 int ts_clock = SO_TS_MONOTONIC; 776 if (setsockopt(srecv, SOL_SOCKET, SO_TIMESTAMP, &on, 777 sizeof(on)) < 0) 778 err(EX_OSERR, "setsockopt SO_TIMESTAMP"); 779 if (setsockopt(srecv, SOL_SOCKET, SO_TS_CLOCK, &ts_clock, 780 sizeof(ts_clock)) < 0) 781 err(EX_OSERR, "setsockopt SO_TS_CLOCK"); 782 } 783 #endif 784 if (sweepmax) { 785 if (sweepmin > sweepmax) 786 errx(EX_USAGE, "Maximum packet size must be no less than the minimum packet size"); 787 788 if (datalen != DEFDATALEN) 789 errx(EX_USAGE, "Packet size and ping sweep are mutually exclusive"); 790 791 if (npackets > 0) { 792 snpackets = npackets; 793 npackets = 0; 794 } else 795 snpackets = 1; 796 datalen = sweepmin; 797 send_len = icmp_len + sweepmin; 798 } 799 if (options & F_SWEEP && !sweepmax) 800 errx(EX_USAGE, "Maximum sweep size must be specified"); 801 802 /* 803 * When pinging the broadcast address, you can get a lot of answers. 804 * Doing something so evil is useful if you are trying to stress the 805 * ethernet, or just want to fill the arp cache to get some stuff for 806 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast 807 * or multicast pings if they wish. 808 */ 809 810 /* 811 * XXX receive buffer needs undetermined space for mbuf overhead 812 * as well. 813 */ 814 hold = IP_MAXPACKET + 128; 815 (void)setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 816 sizeof(hold)); 817 /* CAP_SETSOCKOPT removed */ 818 cap_rights_init(&rights, CAP_RECV, CAP_EVENT); 819 if (caph_rights_limit(srecv, &rights) < 0) 820 err(1, "cap_rights_limit srecv setsockopt"); 821 if (uid == 0) 822 (void)setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, (char *)&hold, 823 sizeof(hold)); 824 /* CAP_SETSOCKOPT removed */ 825 cap_rights_init(&rights, CAP_SEND); 826 if (caph_rights_limit(ssend, &rights) < 0) 827 err(1, "cap_rights_limit ssend setsockopt"); 828 829 if (to->sin_family == AF_INET) { 830 (void)printf("PING %s (%s)", hostname, 831 inet_ntoa(to->sin_addr)); 832 if (source) 833 (void)printf(" from %s", shostname); 834 if (sweepmax) 835 (void)printf(": (%d ... %d) data bytes\n", 836 sweepmin, sweepmax); 837 else 838 (void)printf(": %d data bytes\n", datalen); 839 840 } else { 841 if (sweepmax) 842 (void)printf("PING %s: (%d ... %d) data bytes\n", 843 hostname, sweepmin, sweepmax); 844 else 845 (void)printf("PING %s: %d data bytes\n", hostname, datalen); 846 } 847 848 /* 849 * Use sigaction() instead of signal() to get unambiguous semantics, 850 * in particular with SA_RESTART not set. 851 */ 852 853 sigemptyset(&si_sa.sa_mask); 854 si_sa.sa_flags = 0; 855 856 si_sa.sa_handler = stopit; 857 if (sigaction(SIGINT, &si_sa, 0) == -1) { 858 err(EX_OSERR, "sigaction SIGINT"); 859 } 860 861 si_sa.sa_handler = status; 862 if (sigaction(SIGINFO, &si_sa, 0) == -1) { 863 err(EX_OSERR, "sigaction"); 864 } 865 866 if (alarmtimeout > 0) { 867 si_sa.sa_handler = stopit; 868 if (sigaction(SIGALRM, &si_sa, 0) == -1) 869 err(EX_OSERR, "sigaction SIGALRM"); 870 } 871 872 bzero(&msg, sizeof(msg)); 873 msg.msg_name = (caddr_t)&from; 874 msg.msg_iov = &iov; 875 msg.msg_iovlen = 1; 876 #ifdef SO_TIMESTAMP 877 msg.msg_control = (caddr_t)ctrl; 878 msg.msg_controllen = sizeof(ctrl); 879 #endif 880 iov.iov_base = packet; 881 iov.iov_len = IP_MAXPACKET; 882 883 if (preload == 0) 884 pinger(); /* send the first ping */ 885 else { 886 if (npackets != 0 && preload > npackets) 887 preload = npackets; 888 while (preload--) /* fire off them quickies */ 889 pinger(); 890 } 891 (void)clock_gettime(CLOCK_MONOTONIC, &last); 892 893 if (options & F_FLOOD) { 894 intvl.tv_sec = 0; 895 intvl.tv_nsec = 10000000; 896 } else { 897 intvl.tv_sec = interval / 1000; 898 intvl.tv_nsec = interval % 1000 * 1000000; 899 } 900 901 almost_done = 0; 902 while (!finish_up) { 903 struct timespec now, timeout; 904 fd_set rfds; 905 int n; 906 ssize_t cc; 907 908 check_status(); 909 if ((unsigned)srecv >= FD_SETSIZE) 910 errx(EX_OSERR, "descriptor too large"); 911 FD_ZERO(&rfds); 912 FD_SET(srecv, &rfds); 913 (void)clock_gettime(CLOCK_MONOTONIC, &now); 914 timespecadd(&last, &intvl, &timeout); 915 timespecsub(&timeout, &now, &timeout); 916 if (timeout.tv_sec < 0) 917 timespecclear(&timeout); 918 n = pselect(srecv + 1, &rfds, NULL, NULL, &timeout, NULL); 919 if (n < 0) 920 continue; /* Must be EINTR. */ 921 if (n == 1) { 922 struct timespec *tv = NULL; 923 #ifdef SO_TIMESTAMP 924 struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg); 925 #endif 926 msg.msg_namelen = sizeof(from); 927 if ((cc = recvmsg(srecv, &msg, 0)) < 0) { 928 if (errno == EINTR) 929 continue; 930 warn("recvmsg"); 931 continue; 932 } 933 #ifdef SO_TIMESTAMP 934 if (cmsg->cmsg_level == SOL_SOCKET && 935 cmsg->cmsg_type == SCM_TIMESTAMP && 936 cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) { 937 /* Copy to avoid alignment problems: */ 938 memcpy(&now, CMSG_DATA(cmsg), sizeof(now)); 939 tv = &now; 940 } 941 #endif 942 if (tv == NULL) { 943 (void)clock_gettime(CLOCK_MONOTONIC, &now); 944 tv = &now; 945 } 946 pr_pack((char *)packet, cc, &from, tv); 947 if ((options & F_ONCE && nreceived) || 948 (npackets && nreceived >= npackets)) 949 break; 950 } 951 if (n == 0 || options & F_FLOOD) { 952 if (sweepmax && sntransmitted == snpackets) { 953 for (i = 0; i < sweepincr ; ++i) 954 *datap++ = i; 955 datalen += sweepincr; 956 if (datalen > sweepmax) 957 break; 958 send_len = icmp_len + datalen; 959 sntransmitted = 0; 960 } 961 if (!npackets || ntransmitted < npackets) 962 pinger(); 963 else { 964 if (almost_done) 965 break; 966 almost_done = 1; 967 intvl.tv_nsec = 0; 968 if (nreceived) { 969 intvl.tv_sec = 2 * tmax / 1000; 970 if (!intvl.tv_sec) 971 intvl.tv_sec = 1; 972 } else { 973 intvl.tv_sec = waittime / 1000; 974 intvl.tv_nsec = waittime % 1000 * 1000000; 975 } 976 } 977 (void)clock_gettime(CLOCK_MONOTONIC, &last); 978 if (ntransmitted - nreceived - 1 > nmissedmax) { 979 nmissedmax = ntransmitted - nreceived - 1; 980 if (options & F_MISSED) 981 (void)write(STDOUT_FILENO, &BBELL, 1); 982 } 983 } 984 } 985 finish(); 986 /* NOTREACHED */ 987 exit(0); /* Make the compiler happy */ 988 } 989 990 /* 991 * stopit -- 992 * Set the global bit that causes the main loop to quit. 993 * Do NOT call finish() from here, since finish() does far too much 994 * to be called from a signal handler. 995 */ 996 void 997 stopit(int sig __unused) 998 { 999 1000 /* 1001 * When doing reverse DNS lookups, the finish_up flag might not 1002 * be noticed for a while. Just exit if we get a second SIGINT. 1003 */ 1004 if (!(options & F_NUMERIC) && finish_up) 1005 _exit(nreceived ? 0 : 2); 1006 finish_up = 1; 1007 } 1008 1009 /* 1010 * pinger -- 1011 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1012 * will be added on by the kernel. The ID field is our UNIX process ID, 1013 * and the sequence number is an ascending integer. The first TIMEVAL_LEN 1014 * bytes of the data portion are used to hold a UNIX "timespec" struct in 1015 * host byte-order, to compute the round-trip time. 1016 */ 1017 static void 1018 pinger(void) 1019 { 1020 struct timespec now; 1021 struct tv32 tv32; 1022 struct icmp icp; 1023 int cc, i; 1024 u_char *packet; 1025 1026 packet = outpack; 1027 memcpy(&icp, outpack, ICMP_MINLEN + phdr_len); 1028 icp.icmp_type = icmp_type; 1029 icp.icmp_code = 0; 1030 icp.icmp_cksum = 0; 1031 icp.icmp_seq = htons(ntransmitted); 1032 icp.icmp_id = ident; /* ID */ 1033 1034 CLR(ntransmitted % mx_dup_ck); 1035 1036 if ((options & F_TIME) || timing) { 1037 (void)clock_gettime(CLOCK_MONOTONIC, &now); 1038 /* 1039 * Truncate seconds down to 32 bits in order 1040 * to fit the timestamp within 8 bytes of the 1041 * packet. We're only concerned with 1042 * durations, not absolute times. 1043 */ 1044 tv32.tv32_sec = (uint32_t)htonl(now.tv_sec); 1045 tv32.tv32_nsec = (uint32_t)htonl(now.tv_nsec); 1046 if (options & F_TIME) 1047 icp.icmp_otime = htonl((now.tv_sec % (24*60*60)) 1048 * 1000 + now.tv_nsec / 1000000); 1049 if (timing) 1050 bcopy((void *)&tv32, 1051 (void *)&outpack[ICMP_MINLEN + phdr_len], 1052 sizeof(tv32)); 1053 } 1054 1055 memcpy(outpack, &icp, ICMP_MINLEN + phdr_len); 1056 1057 cc = ICMP_MINLEN + phdr_len + datalen; 1058 1059 /* compute ICMP checksum here */ 1060 icp.icmp_cksum = in_cksum(outpack, cc); 1061 /* Update icmp_cksum in the raw packet data buffer. */ 1062 memcpy(outpack + offsetof(struct icmp, icmp_cksum), &icp.icmp_cksum, 1063 sizeof(icp.icmp_cksum)); 1064 1065 if (options & F_HDRINCL) { 1066 struct ip ip; 1067 1068 cc += sizeof(struct ip); 1069 ip.ip_len = htons(cc); 1070 /* Update ip_len in the raw packet data buffer. */ 1071 memcpy(outpackhdr + offsetof(struct ip, ip_len), &ip.ip_len, 1072 sizeof(ip.ip_len)); 1073 ip.ip_sum = in_cksum(outpackhdr, cc); 1074 /* Update ip_sum in the raw packet data buffer. */ 1075 memcpy(outpackhdr + offsetof(struct ip, ip_sum), &ip.ip_sum, 1076 sizeof(ip.ip_sum)); 1077 packet = outpackhdr; 1078 } 1079 i = send(ssend, (char *)packet, cc, 0); 1080 if (i < 0 || i != cc) { 1081 if (i < 0) { 1082 if (options & F_FLOOD && errno == ENOBUFS) { 1083 usleep(FLOOD_BACKOFF); 1084 return; 1085 } 1086 warn("sendto"); 1087 } else { 1088 warn("%s: partial write: %d of %d bytes", 1089 hostname, i, cc); 1090 } 1091 } 1092 ntransmitted++; 1093 sntransmitted++; 1094 if (!(options & F_QUIET) && options & F_FLOOD) 1095 (void)write(STDOUT_FILENO, &DOT, 1); 1096 } 1097 1098 /* 1099 * pr_pack -- 1100 * Print out the packet, if it came from us. This logic is necessary 1101 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1102 * which arrive ('tis only fair). This permits multiple copies of this 1103 * program to be run without having intermingled output (or statistics!). 1104 */ 1105 static void 1106 pr_pack(char *buf, ssize_t cc, struct sockaddr_in *from, struct timespec *tv) 1107 { 1108 struct in_addr ina; 1109 u_char *cp, *dp, l; 1110 struct icmp icp; 1111 struct ip ip; 1112 const u_char *icmp_data_raw; 1113 double triptime; 1114 int dupflag, hlen, i, j, recv_len; 1115 uint16_t seq; 1116 static int old_rrlen; 1117 static char old_rr[MAX_IPOPTLEN]; 1118 struct ip oip; 1119 u_char oip_header_len; 1120 struct icmp oicmp; 1121 const u_char *oicmp_raw; 1122 1123 /* 1124 * Get size of IP header of the received packet. The 1125 * information is contained in the lower four bits of the 1126 * first byte. 1127 */ 1128 memcpy(&l, buf, sizeof(l)); 1129 hlen = (l & 0x0f) << 2; 1130 memcpy(&ip, buf, hlen); 1131 1132 /* Check the IP header */ 1133 recv_len = cc; 1134 if (cc < hlen + ICMP_MINLEN) { 1135 if (options & F_VERBOSE) 1136 warn("packet too short (%zd bytes) from %s", cc, 1137 inet_ntoa(from->sin_addr)); 1138 return; 1139 } 1140 1141 #ifndef icmp_data 1142 icmp_data_raw = buf + hlen + offsetof(struct icmp, icmp_ip); 1143 #else 1144 icmp_data_raw = buf + hlen + offsetof(struct icmp, icmp_data); 1145 #endif 1146 1147 /* Now the ICMP part */ 1148 cc -= hlen; 1149 memcpy(&icp, buf + hlen, MIN((ssize_t)sizeof(icp), cc)); 1150 if (icp.icmp_type == icmp_type_rsp) { 1151 if (icp.icmp_id != ident) 1152 return; /* 'Twas not our ECHO */ 1153 ++nreceived; 1154 triptime = 0.0; 1155 if (timing) { 1156 struct timespec tv1; 1157 struct tv32 tv32; 1158 const u_char *tp; 1159 1160 tp = icmp_data_raw + phdr_len; 1161 1162 if ((size_t)(cc - ICMP_MINLEN - phdr_len) >= 1163 sizeof(tv1)) { 1164 /* Copy to avoid alignment problems: */ 1165 memcpy(&tv32, tp, sizeof(tv32)); 1166 tv1.tv_sec = ntohl(tv32.tv32_sec); 1167 tv1.tv_nsec = ntohl(tv32.tv32_nsec); 1168 timespecsub(tv, &tv1, tv); 1169 triptime = ((double)tv->tv_sec) * 1000.0 + 1170 ((double)tv->tv_nsec) / 1000000.0; 1171 tsum += triptime; 1172 tsumsq += triptime * triptime; 1173 if (triptime < tmin) 1174 tmin = triptime; 1175 if (triptime > tmax) 1176 tmax = triptime; 1177 } else 1178 timing = 0; 1179 } 1180 1181 seq = ntohs(icp.icmp_seq); 1182 1183 if (TST(seq % mx_dup_ck)) { 1184 ++nrepeats; 1185 --nreceived; 1186 dupflag = 1; 1187 } else { 1188 SET(seq % mx_dup_ck); 1189 dupflag = 0; 1190 } 1191 1192 if (options & F_QUIET) 1193 return; 1194 1195 if (options & F_WAITTIME && triptime > waittime) { 1196 ++nrcvtimeout; 1197 return; 1198 } 1199 1200 if (options & F_FLOOD) 1201 (void)write(STDOUT_FILENO, &BSPACE, 1); 1202 else { 1203 (void)printf("%zd bytes from %s: icmp_seq=%u", cc, 1204 pr_addr(from->sin_addr), seq); 1205 (void)printf(" ttl=%d", ip.ip_ttl); 1206 if (timing) 1207 (void)printf(" time=%.3f ms", triptime); 1208 if (dupflag) 1209 (void)printf(" (DUP!)"); 1210 if (options & F_AUDIBLE) 1211 (void)write(STDOUT_FILENO, &BBELL, 1); 1212 if (options & F_MASK) { 1213 /* Just prentend this cast isn't ugly */ 1214 (void)printf(" mask=%s", 1215 inet_ntoa(*(struct in_addr *)&(icp.icmp_mask))); 1216 } 1217 if (options & F_TIME) { 1218 (void)printf(" tso=%s", pr_ntime(icp.icmp_otime)); 1219 (void)printf(" tsr=%s", pr_ntime(icp.icmp_rtime)); 1220 (void)printf(" tst=%s", pr_ntime(icp.icmp_ttime)); 1221 } 1222 if (recv_len != send_len) { 1223 (void)printf( 1224 "\nwrong total length %d instead of %d", 1225 recv_len, send_len); 1226 } 1227 /* check the data */ 1228 cp = (u_char*)(buf + hlen + offsetof(struct icmp, 1229 icmp_data) + phdr_len); 1230 dp = &outpack[ICMP_MINLEN + phdr_len]; 1231 cc -= ICMP_MINLEN + phdr_len; 1232 i = 0; 1233 if (timing) { /* don't check variable timestamp */ 1234 cp += TIMEVAL_LEN; 1235 dp += TIMEVAL_LEN; 1236 cc -= TIMEVAL_LEN; 1237 i += TIMEVAL_LEN; 1238 } 1239 for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) { 1240 if (*cp != *dp) { 1241 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", 1242 i, *dp, *cp); 1243 (void)printf("\ncp:"); 1244 cp = (u_char*)(buf + hlen + 1245 offsetof(struct icmp, icmp_data)); 1246 for (i = 0; i < datalen; ++i, ++cp) { 1247 if ((i % 16) == 8) 1248 (void)printf("\n\t"); 1249 (void)printf("%2x ", *cp); 1250 } 1251 (void)printf("\ndp:"); 1252 cp = &outpack[ICMP_MINLEN]; 1253 for (i = 0; i < datalen; ++i, ++cp) { 1254 if ((i % 16) == 8) 1255 (void)printf("\n\t"); 1256 (void)printf("%2x ", *cp); 1257 } 1258 break; 1259 } 1260 } 1261 } 1262 } else { 1263 /* 1264 * We've got something other than an ECHOREPLY. 1265 * See if it's a reply to something that we sent. 1266 * We can compare IP destination, protocol, 1267 * and ICMP type and ID. 1268 * 1269 * Only print all the error messages if we are running 1270 * as root to avoid leaking information not normally 1271 * available to those not running as root. 1272 */ 1273 memcpy(&oip_header_len, icmp_data_raw, sizeof(oip_header_len)); 1274 oip_header_len = (oip_header_len & 0x0f) << 2; 1275 memcpy(&oip, icmp_data_raw, oip_header_len); 1276 oicmp_raw = icmp_data_raw + oip_header_len; 1277 memcpy(&oicmp, oicmp_raw, offsetof(struct icmp, icmp_id) + 1278 sizeof(oicmp.icmp_id)); 1279 1280 if (((options & F_VERBOSE) && uid == 0) || 1281 (!(options & F_QUIET2) && 1282 (oip.ip_dst.s_addr == whereto.sin_addr.s_addr) && 1283 (oip.ip_p == IPPROTO_ICMP) && 1284 (oicmp.icmp_type == ICMP_ECHO) && 1285 (oicmp.icmp_id == ident))) { 1286 (void)printf("%zd bytes from %s: ", cc, 1287 pr_addr(from->sin_addr)); 1288 pr_icmph(&icp, &oip, oicmp_raw); 1289 } else 1290 return; 1291 } 1292 1293 /* Display any IP options */ 1294 cp = (u_char *)buf + sizeof(struct ip); 1295 1296 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp) 1297 switch (*cp) { 1298 case IPOPT_EOL: 1299 hlen = 0; 1300 break; 1301 case IPOPT_LSRR: 1302 case IPOPT_SSRR: 1303 (void)printf(*cp == IPOPT_LSRR ? 1304 "\nLSRR: " : "\nSSRR: "); 1305 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1; 1306 hlen -= 2; 1307 cp += 2; 1308 if (j >= INADDR_LEN && 1309 j <= hlen - (int)sizeof(struct ip)) { 1310 for (;;) { 1311 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1312 if (ina.s_addr == 0) 1313 (void)printf("\t0.0.0.0"); 1314 else 1315 (void)printf("\t%s", 1316 pr_addr(ina)); 1317 hlen -= INADDR_LEN; 1318 cp += INADDR_LEN - 1; 1319 j -= INADDR_LEN; 1320 if (j < INADDR_LEN) 1321 break; 1322 (void)putchar('\n'); 1323 } 1324 } else 1325 (void)printf("\t(truncated route)\n"); 1326 break; 1327 case IPOPT_RR: 1328 j = cp[IPOPT_OLEN]; /* get length */ 1329 i = cp[IPOPT_OFFSET]; /* and pointer */ 1330 hlen -= 2; 1331 cp += 2; 1332 if (i > j) 1333 i = j; 1334 i = i - IPOPT_MINOFF + 1; 1335 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) { 1336 old_rrlen = 0; 1337 continue; 1338 } 1339 if (i == old_rrlen 1340 && !bcmp((char *)cp, old_rr, i) 1341 && !(options & F_FLOOD)) { 1342 (void)printf("\t(same route)"); 1343 hlen -= i; 1344 cp += i; 1345 break; 1346 } 1347 old_rrlen = i; 1348 bcopy((char *)cp, old_rr, i); 1349 (void)printf("\nRR: "); 1350 if (i >= INADDR_LEN && 1351 i <= hlen - (int)sizeof(struct ip)) { 1352 for (;;) { 1353 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1354 if (ina.s_addr == 0) 1355 (void)printf("\t0.0.0.0"); 1356 else 1357 (void)printf("\t%s", 1358 pr_addr(ina)); 1359 hlen -= INADDR_LEN; 1360 cp += INADDR_LEN - 1; 1361 i -= INADDR_LEN; 1362 if (i < INADDR_LEN) 1363 break; 1364 (void)putchar('\n'); 1365 } 1366 } else 1367 (void)printf("\t(truncated route)"); 1368 break; 1369 case IPOPT_NOP: 1370 (void)printf("\nNOP"); 1371 break; 1372 default: 1373 (void)printf("\nunknown option %x", *cp); 1374 break; 1375 } 1376 if (!(options & F_FLOOD)) { 1377 (void)putchar('\n'); 1378 (void)fflush(stdout); 1379 } 1380 } 1381 1382 /* 1383 * status -- 1384 * Print out statistics when SIGINFO is received. 1385 */ 1386 1387 static void 1388 status(int sig __unused) 1389 { 1390 1391 siginfo_p = 1; 1392 } 1393 1394 static void 1395 check_status(void) 1396 { 1397 1398 if (siginfo_p) { 1399 siginfo_p = 0; 1400 (void)fprintf(stderr, "\r%ld/%ld packets received (%.1f%%)", 1401 nreceived, ntransmitted, 1402 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0); 1403 if (nreceived && timing) 1404 (void)fprintf(stderr, " %.3f min / %.3f avg / %.3f max", 1405 tmin, tsum / (nreceived + nrepeats), tmax); 1406 (void)fprintf(stderr, "\n"); 1407 } 1408 } 1409 1410 /* 1411 * finish -- 1412 * Print out statistics, and give up. 1413 */ 1414 static void 1415 finish(void) 1416 { 1417 1418 (void)signal(SIGINT, SIG_IGN); 1419 (void)signal(SIGALRM, SIG_IGN); 1420 (void)putchar('\n'); 1421 (void)fflush(stdout); 1422 (void)printf("--- %s ping statistics ---\n", hostname); 1423 (void)printf("%ld packets transmitted, ", ntransmitted); 1424 (void)printf("%ld packets received, ", nreceived); 1425 if (nrepeats) 1426 (void)printf("+%ld duplicates, ", nrepeats); 1427 if (ntransmitted) { 1428 if (nreceived > ntransmitted) 1429 (void)printf("-- somebody's printing up packets!"); 1430 else 1431 (void)printf("%.1f%% packet loss", 1432 ((ntransmitted - nreceived) * 100.0) / 1433 ntransmitted); 1434 } 1435 if (nrcvtimeout) 1436 (void)printf(", %ld packets out of wait time", nrcvtimeout); 1437 (void)putchar('\n'); 1438 if (nreceived && timing) { 1439 double n = nreceived + nrepeats; 1440 double avg = tsum / n; 1441 double vari = tsumsq / n - avg * avg; 1442 (void)printf( 1443 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", 1444 tmin, avg, tmax, sqrt(vari)); 1445 } 1446 1447 if (nreceived) 1448 exit(0); 1449 else 1450 exit(2); 1451 } 1452 1453 #ifdef notdef 1454 static char *ttab[] = { 1455 "Echo Reply", /* ip + seq + udata */ 1456 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */ 1457 "Source Quench", /* IP */ 1458 "Redirect", /* redirect type, gateway, + IP */ 1459 "Echo", 1460 "Time Exceeded", /* transit, frag reassem + IP */ 1461 "Parameter Problem", /* pointer + IP */ 1462 "Timestamp", /* id + seq + three timestamps */ 1463 "Timestamp Reply", /* " */ 1464 "Info Request", /* id + sq */ 1465 "Info Reply" /* " */ 1466 }; 1467 #endif 1468 1469 /* 1470 * pr_icmph -- 1471 * Print a descriptive string about an ICMP header. 1472 */ 1473 static void 1474 pr_icmph(struct icmp *icp, struct ip *oip, const u_char *const oicmp_raw) 1475 { 1476 1477 switch(icp->icmp_type) { 1478 case ICMP_ECHOREPLY: 1479 (void)printf("Echo Reply\n"); 1480 /* XXX ID + Seq + Data */ 1481 break; 1482 case ICMP_UNREACH: 1483 switch(icp->icmp_code) { 1484 case ICMP_UNREACH_NET: 1485 (void)printf("Destination Net Unreachable\n"); 1486 break; 1487 case ICMP_UNREACH_HOST: 1488 (void)printf("Destination Host Unreachable\n"); 1489 break; 1490 case ICMP_UNREACH_PROTOCOL: 1491 (void)printf("Destination Protocol Unreachable\n"); 1492 break; 1493 case ICMP_UNREACH_PORT: 1494 (void)printf("Destination Port Unreachable\n"); 1495 break; 1496 case ICMP_UNREACH_NEEDFRAG: 1497 (void)printf("frag needed and DF set (MTU %d)\n", 1498 ntohs(icp->icmp_nextmtu)); 1499 break; 1500 case ICMP_UNREACH_SRCFAIL: 1501 (void)printf("Source Route Failed\n"); 1502 break; 1503 case ICMP_UNREACH_FILTER_PROHIB: 1504 (void)printf("Communication prohibited by filter\n"); 1505 break; 1506 default: 1507 (void)printf("Dest Unreachable, Bad Code: %d\n", 1508 icp->icmp_code); 1509 break; 1510 } 1511 /* Print returned IP header information */ 1512 pr_retip(oip, oicmp_raw); 1513 break; 1514 case ICMP_SOURCEQUENCH: 1515 (void)printf("Source Quench\n"); 1516 pr_retip(oip, oicmp_raw); 1517 break; 1518 case ICMP_REDIRECT: 1519 switch(icp->icmp_code) { 1520 case ICMP_REDIRECT_NET: 1521 (void)printf("Redirect Network"); 1522 break; 1523 case ICMP_REDIRECT_HOST: 1524 (void)printf("Redirect Host"); 1525 break; 1526 case ICMP_REDIRECT_TOSNET: 1527 (void)printf("Redirect Type of Service and Network"); 1528 break; 1529 case ICMP_REDIRECT_TOSHOST: 1530 (void)printf("Redirect Type of Service and Host"); 1531 break; 1532 default: 1533 (void)printf("Redirect, Bad Code: %d", icp->icmp_code); 1534 break; 1535 } 1536 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr)); 1537 pr_retip(oip, oicmp_raw); 1538 break; 1539 case ICMP_ECHO: 1540 (void)printf("Echo Request\n"); 1541 /* XXX ID + Seq + Data */ 1542 break; 1543 case ICMP_TIMXCEED: 1544 switch(icp->icmp_code) { 1545 case ICMP_TIMXCEED_INTRANS: 1546 (void)printf("Time to live exceeded\n"); 1547 break; 1548 case ICMP_TIMXCEED_REASS: 1549 (void)printf("Frag reassembly time exceeded\n"); 1550 break; 1551 default: 1552 (void)printf("Time exceeded, Bad Code: %d\n", 1553 icp->icmp_code); 1554 break; 1555 } 1556 pr_retip(oip, oicmp_raw); 1557 break; 1558 case ICMP_PARAMPROB: 1559 (void)printf("Parameter problem: pointer = 0x%02x\n", 1560 icp->icmp_hun.ih_pptr); 1561 pr_retip(oip, oicmp_raw); 1562 break; 1563 case ICMP_TSTAMP: 1564 (void)printf("Timestamp\n"); 1565 /* XXX ID + Seq + 3 timestamps */ 1566 break; 1567 case ICMP_TSTAMPREPLY: 1568 (void)printf("Timestamp Reply\n"); 1569 /* XXX ID + Seq + 3 timestamps */ 1570 break; 1571 case ICMP_IREQ: 1572 (void)printf("Information Request\n"); 1573 /* XXX ID + Seq */ 1574 break; 1575 case ICMP_IREQREPLY: 1576 (void)printf("Information Reply\n"); 1577 /* XXX ID + Seq */ 1578 break; 1579 case ICMP_MASKREQ: 1580 (void)printf("Address Mask Request\n"); 1581 break; 1582 case ICMP_MASKREPLY: 1583 (void)printf("Address Mask Reply\n"); 1584 break; 1585 case ICMP_ROUTERADVERT: 1586 (void)printf("Router Advertisement\n"); 1587 break; 1588 case ICMP_ROUTERSOLICIT: 1589 (void)printf("Router Solicitation\n"); 1590 break; 1591 default: 1592 (void)printf("Bad ICMP type: %d\n", icp->icmp_type); 1593 } 1594 } 1595 1596 /* 1597 * pr_iph -- 1598 * Print an IP header with options. 1599 */ 1600 static void 1601 pr_iph(struct ip *ip) 1602 { 1603 struct in_addr ina; 1604 u_char *cp; 1605 int hlen; 1606 1607 hlen = ip->ip_hl << 2; 1608 cp = (u_char *)ip + 20; /* point to options */ 1609 1610 (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1611 (void)printf(" %1x %1x %02x %04x %04x", 1612 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len), 1613 ntohs(ip->ip_id)); 1614 (void)printf(" %1lx %04lx", 1615 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13, 1616 (u_long) ntohl(ip->ip_off) & 0x1fff); 1617 (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, 1618 ntohs(ip->ip_sum)); 1619 memcpy(&ina, &ip->ip_src.s_addr, sizeof ina); 1620 (void)printf(" %s ", inet_ntoa(ina)); 1621 memcpy(&ina, &ip->ip_dst.s_addr, sizeof ina); 1622 (void)printf(" %s ", inet_ntoa(ina)); 1623 /* dump any option bytes */ 1624 while (hlen-- > 20) { 1625 (void)printf("%02x", *cp++); 1626 } 1627 (void)putchar('\n'); 1628 } 1629 1630 /* 1631 * pr_addr -- 1632 * Return an ascii host address as a dotted quad and optionally with 1633 * a hostname. 1634 */ 1635 static char * 1636 pr_addr(struct in_addr ina) 1637 { 1638 struct hostent *hp; 1639 static char buf[16 + 3 + MAXHOSTNAMELEN]; 1640 1641 if (options & F_NUMERIC) 1642 return inet_ntoa(ina); 1643 1644 hp = cap_gethostbyaddr(capdns, (char *)&ina, 4, AF_INET); 1645 1646 if (hp == NULL) 1647 return inet_ntoa(ina); 1648 1649 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1650 inet_ntoa(ina)); 1651 return(buf); 1652 } 1653 1654 /* 1655 * pr_retip -- 1656 * Dump some info on a returned (via ICMP) IP packet. 1657 */ 1658 static void 1659 pr_retip(struct ip *ip, const u_char *cp) 1660 { 1661 pr_iph(ip); 1662 1663 if (ip->ip_p == 6) 1664 (void)printf("TCP: from port %u, to port %u (decimal)\n", 1665 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1666 else if (ip->ip_p == 17) 1667 (void)printf("UDP: from port %u, to port %u (decimal)\n", 1668 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1669 } 1670 1671 static char * 1672 pr_ntime(n_time timestamp) 1673 { 1674 static char buf[11]; 1675 int hour, min, sec; 1676 1677 sec = ntohl(timestamp) / 1000; 1678 hour = sec / 60 / 60; 1679 min = (sec % (60 * 60)) / 60; 1680 sec = (sec % (60 * 60)) % 60; 1681 1682 (void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec); 1683 1684 return (buf); 1685 } 1686 1687 static void 1688 fill(char *bp, char *patp) 1689 { 1690 char *cp; 1691 int pat[16]; 1692 u_int ii, jj, kk; 1693 1694 for (cp = patp; *cp; cp++) { 1695 if (!isxdigit(*cp)) 1696 errx(EX_USAGE, 1697 "patterns must be specified as hex digits"); 1698 1699 } 1700 ii = sscanf(patp, 1701 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1702 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 1703 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 1704 &pat[13], &pat[14], &pat[15]); 1705 1706 if (ii > 0) 1707 for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii) 1708 for (jj = 0; jj < ii; ++jj) 1709 bp[jj + kk] = pat[jj]; 1710 if (!(options & F_QUIET)) { 1711 (void)printf("PATTERN: 0x"); 1712 for (jj = 0; jj < ii; ++jj) 1713 (void)printf("%02x", bp[jj] & 0xFF); 1714 (void)printf("\n"); 1715 } 1716 } 1717 1718 static cap_channel_t * 1719 capdns_setup(void) 1720 { 1721 cap_channel_t *capcas, *capdnsloc; 1722 #ifdef WITH_CASPER 1723 const char *types[2]; 1724 int families[1]; 1725 #endif 1726 capcas = cap_init(); 1727 if (capcas == NULL) 1728 err(1, "unable to create casper process"); 1729 capdnsloc = cap_service_open(capcas, "system.dns"); 1730 /* Casper capability no longer needed. */ 1731 cap_close(capcas); 1732 if (capdnsloc == NULL) 1733 err(1, "unable to open system.dns service"); 1734 #ifdef WITH_CASPER 1735 types[0] = "NAME2ADDR"; 1736 types[1] = "ADDR2NAME"; 1737 if (cap_dns_type_limit(capdnsloc, types, 2) < 0) 1738 err(1, "unable to limit access to system.dns service"); 1739 families[0] = AF_INET; 1740 if (cap_dns_family_limit(capdnsloc, families, 1) < 0) 1741 err(1, "unable to limit access to system.dns service"); 1742 #endif 1743 return (capdnsloc); 1744 } 1745 1746 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 1747 #define SECOPT " [-P policy]" 1748 #else 1749 #define SECOPT "" 1750 #endif 1751 static void 1752 usage(void) 1753 { 1754 1755 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 1756 "usage: ping [-AaDdfHnoQqRrv] [-c count] [-G sweepmaxsize] [-g sweepminsize]", 1757 " [-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]", 1758 " " SECOPT " [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]", 1759 " [-W waittime] [-z tos] host", 1760 " ping [-AaDdfHLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]", 1761 " [-M mask | time] [-m ttl]" SECOPT " [-p pattern] [-S src_addr]", 1762 " [-s packetsize] [-T ttl] [-t timeout] [-W waittime]", 1763 " [-z tos] mcast-group"); 1764 exit(EX_USAGE); 1765 } 1766