1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Muuss. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #if 0 36 #ifndef lint 37 static const char copyright[] = 38 "@(#) Copyright (c) 1989, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93"; 44 #endif /* not lint */ 45 #endif 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 /* 50 * P I N G . C 51 * 52 * Using the Internet Control Message Protocol (ICMP) "ECHO" facility, 53 * measure round-trip-delays and packet loss across network paths. 54 * 55 * Author - 56 * Mike Muuss 57 * U. S. Army Ballistic Research Laboratory 58 * December, 1983 59 * 60 * Status - 61 * Public Domain. Distribution Unlimited. 62 * Bugs - 63 * More statistics could always be gathered. 64 * This program has to run SUID to ROOT to access the ICMP socket. 65 */ 66 67 #include <sys/param.h> /* NB: we rely on this for <sys/types.h> */ 68 #include <sys/capsicum.h> 69 #include <sys/socket.h> 70 #include <sys/sysctl.h> 71 #include <sys/time.h> 72 #include <sys/uio.h> 73 74 #include <netinet/in.h> 75 #include <netinet/in_systm.h> 76 #include <netinet/ip.h> 77 #include <netinet/ip_icmp.h> 78 #include <netinet/ip_var.h> 79 #include <arpa/inet.h> 80 81 #include <libcasper.h> 82 #include <casper/cap_dns.h> 83 84 #ifdef IPSEC 85 #include <netipsec/ipsec.h> 86 #endif /*IPSEC*/ 87 88 #include <capsicum_helpers.h> 89 #include <ctype.h> 90 #include <err.h> 91 #include <errno.h> 92 #include <math.h> 93 #include <netdb.h> 94 #include <signal.h> 95 #include <stdio.h> 96 #include <stdlib.h> 97 #include <string.h> 98 #include <sysexits.h> 99 #include <time.h> 100 #include <unistd.h> 101 102 #include "utils.h" 103 104 #define INADDR_LEN ((int)sizeof(in_addr_t)) 105 #define TIMEVAL_LEN ((int)sizeof(struct tv32)) 106 #define MASK_LEN (ICMP_MASKLEN - ICMP_MINLEN) 107 #define TS_LEN (ICMP_TSLEN - ICMP_MINLEN) 108 #define DEFDATALEN 56 /* default data length */ 109 #define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */ 110 /* runs out of buffer space */ 111 #define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN) 112 #define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN) 113 #define MAXWAIT 10000 /* max ms to wait for response */ 114 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */ 115 #define MAXTOS 255 116 117 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 118 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 119 #define SET(bit) (A(bit) |= B(bit)) 120 #define CLR(bit) (A(bit) &= (~B(bit))) 121 #define TST(bit) (A(bit) & B(bit)) 122 123 struct tv32 { 124 int32_t tv32_sec; 125 int32_t tv32_nsec; 126 }; 127 128 /* various options */ 129 static int options; 130 #define F_FLOOD 0x0001 131 #define F_INTERVAL 0x0002 132 #define F_NUMERIC 0x0004 133 #define F_PINGFILLED 0x0008 134 #define F_QUIET 0x0010 135 #define F_RROUTE 0x0020 136 #define F_SO_DEBUG 0x0040 137 #define F_SO_DONTROUTE 0x0080 138 #define F_VERBOSE 0x0100 139 #define F_QUIET2 0x0200 140 #define F_NOLOOP 0x0400 141 #define F_MTTL 0x0800 142 #define F_MIF 0x1000 143 #define F_AUDIBLE 0x2000 144 #ifdef IPSEC 145 #ifdef IPSEC_POLICY_IPSEC 146 #define F_POLICY 0x4000 147 #endif /*IPSEC_POLICY_IPSEC*/ 148 #endif /*IPSEC*/ 149 #define F_TTL 0x8000 150 #define F_MISSED 0x10000 151 #define F_ONCE 0x20000 152 #define F_HDRINCL 0x40000 153 #define F_MASK 0x80000 154 #define F_TIME 0x100000 155 #define F_SWEEP 0x200000 156 #define F_WAITTIME 0x400000 157 158 /* 159 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 160 * number of received sequence numbers we can keep track of. Change 128 161 * to 8192 for complete accuracy... 162 */ 163 #define MAX_DUP_CHK (8 * 128) 164 static int mx_dup_ck = MAX_DUP_CHK; 165 static char rcvd_tbl[MAX_DUP_CHK / 8]; 166 167 static struct sockaddr_in whereto; /* who to ping */ 168 static int datalen = DEFDATALEN; 169 static int maxpayload; 170 static int ssend; /* send socket file descriptor */ 171 static int srecv; /* receive socket file descriptor */ 172 static u_char outpackhdr[IP_MAXPACKET], *outpack; 173 static char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */ 174 static char BSPACE = '\b'; /* characters written for flood */ 175 static char DOT = '.'; 176 static char *hostname; 177 static char *shostname; 178 static int ident; /* process id to identify our packets */ 179 static int uid; /* cached uid for micro-optimization */ 180 static u_char icmp_type = ICMP_ECHO; 181 static u_char icmp_type_rsp = ICMP_ECHOREPLY; 182 static int phdr_len = 0; 183 static int send_len; 184 185 /* counters */ 186 static long nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 187 static long npackets; /* max packets to transmit */ 188 static long nreceived; /* # of packets we got back */ 189 static long nrepeats; /* number of duplicates */ 190 static long ntransmitted; /* sequence # for outbound packets = #sent */ 191 static long snpackets; /* max packets to transmit in one sweep */ 192 static long sntransmitted; /* # of packets we sent in this sweep */ 193 static int sweepmax; /* max value of payload in sweep */ 194 static int sweepmin = 0; /* start value of payload in sweep */ 195 static int sweepincr = 1; /* payload increment in sweep */ 196 static int interval = 1000; /* interval between packets, ms */ 197 static int waittime = MAXWAIT; /* timeout for each packet */ 198 static long nrcvtimeout = 0; /* # of packets we got back after waittime */ 199 200 /* timing */ 201 static int timing; /* flag to do timing */ 202 static double tmin = 999999999.0; /* minimum round trip time */ 203 static double tmax = 0.0; /* maximum round trip time */ 204 static double tsum = 0.0; /* sum of all times, for doing average */ 205 static double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 206 207 /* nonzero if we've been told to finish up */ 208 static volatile sig_atomic_t finish_up; 209 static volatile sig_atomic_t siginfo_p; 210 211 static cap_channel_t *capdns; 212 213 static void fill(char *, char *); 214 static cap_channel_t *capdns_setup(void); 215 static void check_status(void); 216 static void finish(void) __dead2; 217 static void pinger(void); 218 static char *pr_addr(struct in_addr); 219 static char *pr_ntime(n_time); 220 static void pr_icmph(struct icmp *); 221 static void pr_iph(struct ip *); 222 static void pr_pack(char *, int, struct sockaddr_in *, struct timespec *); 223 static void pr_retip(struct ip *); 224 static void status(int); 225 static void stopit(int); 226 static void usage(void) __dead2; 227 228 int 229 main(int argc, char *const *argv) 230 { 231 struct sockaddr_in from, sock_in; 232 struct in_addr ifaddr; 233 struct timespec last, intvl; 234 struct iovec iov; 235 struct ip *ip; 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 /* 265 * Do the stuff that we need root priv's for *first*, and 266 * then drop our setuid bit. Save error reporting for 267 * after arg parsing. 268 * 269 * Historicaly ping was using one socket 's' for sending and for 270 * receiving. After capsicum(4) related changes we use two 271 * sockets. It was done for special ping use case - when user 272 * issue ping on multicast or broadcast address replies come 273 * from different addresses, not from the address we 274 * connect(2)'ed to, and send socket do not receive those 275 * packets. 276 */ 277 ssend = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 278 ssend_errno = errno; 279 srecv = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 280 srecv_errno = errno; 281 282 if (setuid(getuid()) != 0) 283 err(EX_NOPERM, "setuid() failed"); 284 uid = getuid(); 285 286 if (ssend < 0) { 287 errno = ssend_errno; 288 err(EX_OSERR, "ssend socket"); 289 } 290 291 if (srecv < 0) { 292 errno = srecv_errno; 293 err(EX_OSERR, "srecv socket"); 294 } 295 296 alarmtimeout = df = preload = tos = 0; 297 298 outpack = outpackhdr + sizeof(struct ip); 299 while ((ch = getopt(argc, argv, 300 "Aac:DdfG:g:h:I:i:Ll:M:m:nop:QqRrS:s:T:t:vW:z:" 301 #ifdef IPSEC 302 #ifdef IPSEC_POLICY_IPSEC 303 "P:" 304 #endif /*IPSEC_POLICY_IPSEC*/ 305 #endif /*IPSEC*/ 306 )) != -1) 307 { 308 switch(ch) { 309 case 'A': 310 options |= F_MISSED; 311 break; 312 case 'a': 313 options |= F_AUDIBLE; 314 break; 315 case 'c': 316 ltmp = strtol(optarg, &ep, 0); 317 if (*ep || ep == optarg || ltmp <= 0) 318 errx(EX_USAGE, 319 "invalid count of packets to transmit: `%s'", 320 optarg); 321 npackets = ltmp; 322 break; 323 case 'D': 324 options |= F_HDRINCL; 325 df = 1; 326 break; 327 case 'd': 328 options |= F_SO_DEBUG; 329 break; 330 case 'f': 331 if (uid) { 332 errno = EPERM; 333 err(EX_NOPERM, "-f flag"); 334 } 335 options |= F_FLOOD; 336 setbuf(stdout, (char *)NULL); 337 break; 338 case 'G': /* Maximum packet size for ping sweep */ 339 ltmp = strtol(optarg, &ep, 0); 340 if (*ep || ep == optarg || ltmp <= 0) 341 errx(EX_USAGE, "invalid packet size: `%s'", 342 optarg); 343 if (uid != 0 && ltmp > DEFDATALEN) { 344 errno = EPERM; 345 err(EX_NOPERM, 346 "packet size too large: %ld > %u", 347 ltmp, DEFDATALEN); 348 } 349 options |= F_SWEEP; 350 sweepmax = ltmp; 351 break; 352 case 'g': /* Minimum packet size for ping sweep */ 353 ltmp = strtol(optarg, &ep, 0); 354 if (*ep || ep == optarg || ltmp <= 0) 355 errx(EX_USAGE, "invalid packet size: `%s'", 356 optarg); 357 if (uid != 0 && ltmp > DEFDATALEN) { 358 errno = EPERM; 359 err(EX_NOPERM, 360 "packet size too large: %ld > %u", 361 ltmp, DEFDATALEN); 362 } 363 options |= F_SWEEP; 364 sweepmin = ltmp; 365 break; 366 case 'h': /* Packet size increment for ping sweep */ 367 ltmp = strtol(optarg, &ep, 0); 368 if (*ep || ep == optarg || ltmp < 1) 369 errx(EX_USAGE, "invalid increment size: `%s'", 370 optarg); 371 if (uid != 0 && ltmp > DEFDATALEN) { 372 errno = EPERM; 373 err(EX_NOPERM, 374 "packet size too large: %ld > %u", 375 ltmp, DEFDATALEN); 376 } 377 options |= F_SWEEP; 378 sweepincr = ltmp; 379 break; 380 case 'I': /* multicast interface */ 381 if (inet_aton(optarg, &ifaddr) == 0) 382 errx(EX_USAGE, 383 "invalid multicast interface: `%s'", 384 optarg); 385 options |= F_MIF; 386 break; 387 case 'i': /* wait between sending packets */ 388 t = strtod(optarg, &ep) * 1000.0; 389 if (*ep || ep == optarg || t > (double)INT_MAX) 390 errx(EX_USAGE, "invalid timing interval: `%s'", 391 optarg); 392 options |= F_INTERVAL; 393 interval = (int)t; 394 if (uid && interval < 1000) { 395 errno = EPERM; 396 err(EX_NOPERM, "-i interval too short"); 397 } 398 break; 399 case 'L': 400 options |= F_NOLOOP; 401 loop = 0; 402 break; 403 case 'l': 404 ltmp = strtol(optarg, &ep, 0); 405 if (*ep || ep == optarg || ltmp > INT_MAX || ltmp < 0) 406 errx(EX_USAGE, 407 "invalid preload value: `%s'", optarg); 408 if (uid) { 409 errno = EPERM; 410 err(EX_NOPERM, "-l flag"); 411 } 412 preload = ltmp; 413 break; 414 case 'M': 415 switch(optarg[0]) { 416 case 'M': 417 case 'm': 418 options |= F_MASK; 419 break; 420 case 'T': 421 case 't': 422 options |= F_TIME; 423 break; 424 default: 425 errx(EX_USAGE, "invalid message: `%c'", optarg[0]); 426 break; 427 } 428 break; 429 case 'm': /* TTL */ 430 ltmp = strtol(optarg, &ep, 0); 431 if (*ep || ep == optarg || ltmp > MAXTTL || ltmp < 0) 432 errx(EX_USAGE, "invalid TTL: `%s'", optarg); 433 ttl = ltmp; 434 options |= F_TTL; 435 break; 436 case 'n': 437 options |= F_NUMERIC; 438 break; 439 case 'o': 440 options |= F_ONCE; 441 break; 442 #ifdef IPSEC 443 #ifdef IPSEC_POLICY_IPSEC 444 case 'P': 445 options |= F_POLICY; 446 if (!strncmp("in", optarg, 2)) 447 policy_in = strdup(optarg); 448 else if (!strncmp("out", optarg, 3)) 449 policy_out = strdup(optarg); 450 else 451 errx(1, "invalid security policy"); 452 break; 453 #endif /*IPSEC_POLICY_IPSEC*/ 454 #endif /*IPSEC*/ 455 case 'p': /* fill buffer with user pattern */ 456 options |= F_PINGFILLED; 457 payload = optarg; 458 break; 459 case 'Q': 460 options |= F_QUIET2; 461 break; 462 case 'q': 463 options |= F_QUIET; 464 break; 465 case 'R': 466 options |= F_RROUTE; 467 break; 468 case 'r': 469 options |= F_SO_DONTROUTE; 470 break; 471 case 'S': 472 source = optarg; 473 break; 474 case 's': /* size of packet to send */ 475 ltmp = strtol(optarg, &ep, 0); 476 if (*ep || ep == optarg || ltmp < 0) 477 errx(EX_USAGE, "invalid packet size: `%s'", 478 optarg); 479 if (uid != 0 && ltmp > DEFDATALEN) { 480 errno = EPERM; 481 err(EX_NOPERM, 482 "packet size too large: %ld > %u", 483 ltmp, DEFDATALEN); 484 } 485 datalen = ltmp; 486 break; 487 case 'T': /* multicast TTL */ 488 ltmp = strtol(optarg, &ep, 0); 489 if (*ep || ep == optarg || ltmp > MAXTTL || ltmp < 0) 490 errx(EX_USAGE, "invalid multicast TTL: `%s'", 491 optarg); 492 mttl = ltmp; 493 options |= F_MTTL; 494 break; 495 case 't': 496 alarmtimeout = strtoul(optarg, &ep, 0); 497 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 498 errx(EX_USAGE, "invalid timeout: `%s'", 499 optarg); 500 if (alarmtimeout > MAXALARM) 501 errx(EX_USAGE, "invalid timeout: `%s' > %d", 502 optarg, MAXALARM); 503 alarm((int)alarmtimeout); 504 break; 505 case 'v': 506 options |= F_VERBOSE; 507 break; 508 case 'W': /* wait ms for answer */ 509 t = strtod(optarg, &ep); 510 if (*ep || ep == optarg || t > (double)INT_MAX) 511 errx(EX_USAGE, "invalid timing interval: `%s'", 512 optarg); 513 options |= F_WAITTIME; 514 waittime = (int)t; 515 break; 516 case 'z': 517 options |= F_HDRINCL; 518 ltmp = strtol(optarg, &ep, 0); 519 if (*ep || ep == optarg || ltmp > MAXTOS || ltmp < 0) 520 errx(EX_USAGE, "invalid TOS: `%s'", optarg); 521 tos = ltmp; 522 break; 523 default: 524 usage(); 525 } 526 } 527 528 if (argc - optind != 1) 529 usage(); 530 target = argv[optind]; 531 532 switch (options & (F_MASK|F_TIME)) { 533 case 0: break; 534 case F_MASK: 535 icmp_type = ICMP_MASKREQ; 536 icmp_type_rsp = ICMP_MASKREPLY; 537 phdr_len = MASK_LEN; 538 if (!(options & F_QUIET)) 539 (void)printf("ICMP_MASKREQ\n"); 540 break; 541 case F_TIME: 542 icmp_type = ICMP_TSTAMP; 543 icmp_type_rsp = ICMP_TSTAMPREPLY; 544 phdr_len = TS_LEN; 545 if (!(options & F_QUIET)) 546 (void)printf("ICMP_TSTAMP\n"); 547 break; 548 default: 549 errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive."); 550 break; 551 } 552 icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len; 553 if (options & F_RROUTE) 554 icmp_len += MAX_IPOPTLEN; 555 maxpayload = IP_MAXPACKET - icmp_len; 556 if (datalen > maxpayload) 557 errx(EX_USAGE, "packet size too large: %d > %d", datalen, 558 maxpayload); 559 send_len = icmp_len + datalen; 560 datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN]; 561 if (options & F_PINGFILLED) { 562 fill((char *)datap, payload); 563 } 564 capdns = capdns_setup(); 565 if (source) { 566 bzero((char *)&sock_in, sizeof(sock_in)); 567 sock_in.sin_family = AF_INET; 568 if (inet_aton(source, &sock_in.sin_addr) != 0) { 569 shostname = source; 570 } else { 571 hp = cap_gethostbyname2(capdns, source, AF_INET); 572 if (!hp) 573 errx(EX_NOHOST, "cannot resolve %s: %s", 574 source, hstrerror(h_errno)); 575 576 sock_in.sin_len = sizeof sock_in; 577 if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) || 578 hp->h_length < 0) 579 errx(1, "gethostbyname2: illegal address"); 580 memcpy(&sock_in.sin_addr, hp->h_addr_list[0], 581 sizeof(sock_in.sin_addr)); 582 (void)strncpy(snamebuf, hp->h_name, 583 sizeof(snamebuf) - 1); 584 snamebuf[sizeof(snamebuf) - 1] = '\0'; 585 shostname = snamebuf; 586 } 587 if (bind(ssend, (struct sockaddr *)&sock_in, sizeof sock_in) == 588 -1) 589 err(1, "bind"); 590 } 591 592 bzero(&whereto, sizeof(whereto)); 593 to = &whereto; 594 to->sin_family = AF_INET; 595 to->sin_len = sizeof *to; 596 if (inet_aton(target, &to->sin_addr) != 0) { 597 hostname = target; 598 } else { 599 hp = cap_gethostbyname2(capdns, target, AF_INET); 600 if (!hp) 601 errx(EX_NOHOST, "cannot resolve %s: %s", 602 target, hstrerror(h_errno)); 603 604 if ((unsigned)hp->h_length > sizeof(to->sin_addr)) 605 errx(1, "gethostbyname2 returned an illegal address"); 606 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr); 607 (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1); 608 hnamebuf[sizeof(hnamebuf) - 1] = '\0'; 609 hostname = hnamebuf; 610 } 611 612 /* From now on we will use only reverse DNS lookups. */ 613 #ifdef WITH_CASPER 614 if (capdns != NULL) { 615 const char *types[1]; 616 617 types[0] = "ADDR2NAME"; 618 if (cap_dns_type_limit(capdns, types, 1) < 0) 619 err(1, "unable to limit access to system.dns service"); 620 } 621 #endif 622 if (connect(ssend, (struct sockaddr *)&whereto, sizeof(whereto)) != 0) 623 err(1, "connect"); 624 625 if (options & F_FLOOD && options & F_INTERVAL) 626 errx(EX_USAGE, "-f and -i: incompatible options"); 627 628 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 629 errx(EX_USAGE, 630 "-f flag cannot be used with multicast destination"); 631 if (options & (F_MIF | F_NOLOOP | F_MTTL) 632 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 633 errx(EX_USAGE, 634 "-I, -L, -T flags cannot be used with unicast destination"); 635 636 if (datalen >= TIMEVAL_LEN) /* can we time transfer */ 637 timing = 1; 638 639 if (!(options & F_PINGFILLED)) 640 for (i = TIMEVAL_LEN; i < datalen; ++i) 641 *datap++ = i; 642 643 ident = getpid() & 0xFFFF; 644 645 hold = 1; 646 if (options & F_SO_DEBUG) { 647 (void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold, 648 sizeof(hold)); 649 (void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold, 650 sizeof(hold)); 651 } 652 if (options & F_SO_DONTROUTE) 653 (void)setsockopt(ssend, SOL_SOCKET, SO_DONTROUTE, (char *)&hold, 654 sizeof(hold)); 655 #ifdef IPSEC 656 #ifdef IPSEC_POLICY_IPSEC 657 if (options & F_POLICY) { 658 char *buf; 659 if (policy_in != NULL) { 660 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 661 if (buf == NULL) 662 errx(EX_CONFIG, "%s", ipsec_strerror()); 663 if (setsockopt(srecv, IPPROTO_IP, IP_IPSEC_POLICY, 664 buf, ipsec_get_policylen(buf)) < 0) 665 err(EX_CONFIG, 666 "ipsec policy cannot be configured"); 667 free(buf); 668 } 669 670 if (policy_out != NULL) { 671 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 672 if (buf == NULL) 673 errx(EX_CONFIG, "%s", ipsec_strerror()); 674 if (setsockopt(ssend, IPPROTO_IP, IP_IPSEC_POLICY, 675 buf, ipsec_get_policylen(buf)) < 0) 676 err(EX_CONFIG, 677 "ipsec policy cannot be configured"); 678 free(buf); 679 } 680 } 681 #endif /*IPSEC_POLICY_IPSEC*/ 682 #endif /*IPSEC*/ 683 684 if (options & F_HDRINCL) { 685 ip = (struct ip*)outpackhdr; 686 if (!(options & (F_TTL | F_MTTL))) { 687 mib[0] = CTL_NET; 688 mib[1] = PF_INET; 689 mib[2] = IPPROTO_IP; 690 mib[3] = IPCTL_DEFTTL; 691 sz = sizeof(ttl); 692 if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1) 693 err(1, "sysctl(net.inet.ip.ttl)"); 694 } 695 setsockopt(ssend, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold)); 696 ip->ip_v = IPVERSION; 697 ip->ip_hl = sizeof(struct ip) >> 2; 698 ip->ip_tos = tos; 699 ip->ip_id = 0; 700 ip->ip_off = htons(df ? IP_DF : 0); 701 ip->ip_ttl = ttl; 702 ip->ip_p = IPPROTO_ICMP; 703 ip->ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY; 704 ip->ip_dst = to->sin_addr; 705 } 706 707 /* 708 * Here we enter capability mode. Further down access to global 709 * namespaces (e.g filesystem) is restricted (see capsicum(4)). 710 * We must connect(2) our socket before this point. 711 */ 712 caph_cache_catpages(); 713 if (caph_enter_casper() < 0) 714 err(1, "cap_enter"); 715 716 cap_rights_init(&rights, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT); 717 if (caph_rights_limit(srecv, &rights) < 0) 718 err(1, "cap_rights_limit srecv"); 719 cap_rights_init(&rights, CAP_SEND, CAP_SETSOCKOPT); 720 if (caph_rights_limit(ssend, &rights) < 0) 721 err(1, "cap_rights_limit ssend"); 722 723 /* record route option */ 724 if (options & F_RROUTE) { 725 #ifdef IP_OPTIONS 726 bzero(rspace, sizeof(rspace)); 727 rspace[IPOPT_OPTVAL] = IPOPT_RR; 728 rspace[IPOPT_OLEN] = sizeof(rspace) - 1; 729 rspace[IPOPT_OFFSET] = IPOPT_MINOFF; 730 rspace[sizeof(rspace) - 1] = IPOPT_EOL; 731 if (setsockopt(ssend, IPPROTO_IP, IP_OPTIONS, rspace, 732 sizeof(rspace)) < 0) 733 err(EX_OSERR, "setsockopt IP_OPTIONS"); 734 #else 735 errx(EX_UNAVAILABLE, 736 "record route not available in this implementation"); 737 #endif /* IP_OPTIONS */ 738 } 739 740 if (options & F_TTL) { 741 if (setsockopt(ssend, IPPROTO_IP, IP_TTL, &ttl, 742 sizeof(ttl)) < 0) { 743 err(EX_OSERR, "setsockopt IP_TTL"); 744 } 745 } 746 if (options & F_NOLOOP) { 747 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, 748 sizeof(loop)) < 0) { 749 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP"); 750 } 751 } 752 if (options & F_MTTL) { 753 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_TTL, &mttl, 754 sizeof(mttl)) < 0) { 755 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL"); 756 } 757 } 758 if (options & F_MIF) { 759 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr, 760 sizeof(ifaddr)) < 0) { 761 err(EX_OSERR, "setsockopt IP_MULTICAST_IF"); 762 } 763 } 764 #ifdef SO_TIMESTAMP 765 { 766 int on = 1; 767 int ts_clock = SO_TS_MONOTONIC; 768 if (setsockopt(srecv, SOL_SOCKET, SO_TIMESTAMP, &on, 769 sizeof(on)) < 0) 770 err(EX_OSERR, "setsockopt SO_TIMESTAMP"); 771 if (setsockopt(srecv, SOL_SOCKET, SO_TS_CLOCK, &ts_clock, 772 sizeof(ts_clock)) < 0) 773 err(EX_OSERR, "setsockopt SO_TS_CLOCK"); 774 } 775 #endif 776 if (sweepmax) { 777 if (sweepmin > sweepmax) 778 errx(EX_USAGE, "Maximum packet size must be no less than the minimum packet size"); 779 780 if (datalen != DEFDATALEN) 781 errx(EX_USAGE, "Packet size and ping sweep are mutually exclusive"); 782 783 if (npackets > 0) { 784 snpackets = npackets; 785 npackets = 0; 786 } else 787 snpackets = 1; 788 datalen = sweepmin; 789 send_len = icmp_len + sweepmin; 790 } 791 if (options & F_SWEEP && !sweepmax) 792 errx(EX_USAGE, "Maximum sweep size must be specified"); 793 794 /* 795 * When pinging the broadcast address, you can get a lot of answers. 796 * Doing something so evil is useful if you are trying to stress the 797 * ethernet, or just want to fill the arp cache to get some stuff for 798 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast 799 * or multicast pings if they wish. 800 */ 801 802 /* 803 * XXX receive buffer needs undetermined space for mbuf overhead 804 * as well. 805 */ 806 hold = IP_MAXPACKET + 128; 807 (void)setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 808 sizeof(hold)); 809 /* CAP_SETSOCKOPT removed */ 810 cap_rights_init(&rights, CAP_RECV, CAP_EVENT); 811 if (caph_rights_limit(srecv, &rights) < 0) 812 err(1, "cap_rights_limit srecv setsockopt"); 813 if (uid == 0) 814 (void)setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, (char *)&hold, 815 sizeof(hold)); 816 /* CAP_SETSOCKOPT removed */ 817 cap_rights_init(&rights, CAP_SEND); 818 if (caph_rights_limit(ssend, &rights) < 0) 819 err(1, "cap_rights_limit ssend setsockopt"); 820 821 if (to->sin_family == AF_INET) { 822 (void)printf("PING %s (%s)", hostname, 823 inet_ntoa(to->sin_addr)); 824 if (source) 825 (void)printf(" from %s", shostname); 826 if (sweepmax) 827 (void)printf(": (%d ... %d) data bytes\n", 828 sweepmin, sweepmax); 829 else 830 (void)printf(": %d data bytes\n", datalen); 831 832 } else { 833 if (sweepmax) 834 (void)printf("PING %s: (%d ... %d) data bytes\n", 835 hostname, sweepmin, sweepmax); 836 else 837 (void)printf("PING %s: %d data bytes\n", hostname, datalen); 838 } 839 840 /* 841 * Use sigaction() instead of signal() to get unambiguous semantics, 842 * in particular with SA_RESTART not set. 843 */ 844 845 sigemptyset(&si_sa.sa_mask); 846 si_sa.sa_flags = 0; 847 848 si_sa.sa_handler = stopit; 849 if (sigaction(SIGINT, &si_sa, 0) == -1) { 850 err(EX_OSERR, "sigaction SIGINT"); 851 } 852 853 si_sa.sa_handler = status; 854 if (sigaction(SIGINFO, &si_sa, 0) == -1) { 855 err(EX_OSERR, "sigaction"); 856 } 857 858 if (alarmtimeout > 0) { 859 si_sa.sa_handler = stopit; 860 if (sigaction(SIGALRM, &si_sa, 0) == -1) 861 err(EX_OSERR, "sigaction SIGALRM"); 862 } 863 864 bzero(&msg, sizeof(msg)); 865 msg.msg_name = (caddr_t)&from; 866 msg.msg_iov = &iov; 867 msg.msg_iovlen = 1; 868 #ifdef SO_TIMESTAMP 869 msg.msg_control = (caddr_t)ctrl; 870 #endif 871 iov.iov_base = packet; 872 iov.iov_len = IP_MAXPACKET; 873 874 if (preload == 0) 875 pinger(); /* send the first ping */ 876 else { 877 if (npackets != 0 && preload > npackets) 878 preload = npackets; 879 while (preload--) /* fire off them quickies */ 880 pinger(); 881 } 882 (void)clock_gettime(CLOCK_MONOTONIC, &last); 883 884 if (options & F_FLOOD) { 885 intvl.tv_sec = 0; 886 intvl.tv_nsec = 10000000; 887 } else { 888 intvl.tv_sec = interval / 1000; 889 intvl.tv_nsec = interval % 1000 * 1000000; 890 } 891 892 almost_done = 0; 893 while (!finish_up) { 894 struct timespec now, timeout; 895 fd_set rfds; 896 int cc, n; 897 898 check_status(); 899 if ((unsigned)srecv >= FD_SETSIZE) 900 errx(EX_OSERR, "descriptor too large"); 901 FD_ZERO(&rfds); 902 FD_SET(srecv, &rfds); 903 (void)clock_gettime(CLOCK_MONOTONIC, &now); 904 timespecadd(&last, &intvl, &timeout); 905 timespecsub(&timeout, &now, &timeout); 906 if (timeout.tv_sec < 0) 907 timespecclear(&timeout); 908 n = pselect(srecv + 1, &rfds, NULL, NULL, &timeout, NULL); 909 if (n < 0) 910 continue; /* Must be EINTR. */ 911 if (n == 1) { 912 struct timespec *tv = NULL; 913 #ifdef SO_TIMESTAMP 914 struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl; 915 916 msg.msg_controllen = sizeof(ctrl); 917 #endif 918 msg.msg_namelen = sizeof(from); 919 if ((cc = recvmsg(srecv, &msg, 0)) < 0) { 920 if (errno == EINTR) 921 continue; 922 warn("recvmsg"); 923 continue; 924 } 925 #ifdef SO_TIMESTAMP 926 if (cmsg->cmsg_level == SOL_SOCKET && 927 cmsg->cmsg_type == SCM_TIMESTAMP && 928 cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) { 929 /* Copy to avoid alignment problems: */ 930 memcpy(&now, CMSG_DATA(cmsg), sizeof(now)); 931 tv = &now; 932 } 933 #endif 934 if (tv == NULL) { 935 (void)clock_gettime(CLOCK_MONOTONIC, &now); 936 tv = &now; 937 } 938 pr_pack((char *)packet, cc, &from, tv); 939 if ((options & F_ONCE && nreceived) || 940 (npackets && nreceived >= npackets)) 941 break; 942 } 943 if (n == 0 || options & F_FLOOD) { 944 if (sweepmax && sntransmitted == snpackets) { 945 for (i = 0; i < sweepincr ; ++i) 946 *datap++ = i; 947 datalen += sweepincr; 948 if (datalen > sweepmax) 949 break; 950 send_len = icmp_len + datalen; 951 sntransmitted = 0; 952 } 953 if (!npackets || ntransmitted < npackets) 954 pinger(); 955 else { 956 if (almost_done) 957 break; 958 almost_done = 1; 959 intvl.tv_nsec = 0; 960 if (nreceived) { 961 intvl.tv_sec = 2 * tmax / 1000; 962 if (!intvl.tv_sec) 963 intvl.tv_sec = 1; 964 } else { 965 intvl.tv_sec = waittime / 1000; 966 intvl.tv_nsec = waittime % 1000 * 1000000; 967 } 968 } 969 (void)clock_gettime(CLOCK_MONOTONIC, &last); 970 if (ntransmitted - nreceived - 1 > nmissedmax) { 971 nmissedmax = ntransmitted - nreceived - 1; 972 if (options & F_MISSED) 973 (void)write(STDOUT_FILENO, &BBELL, 1); 974 } 975 } 976 } 977 finish(); 978 /* NOTREACHED */ 979 exit(0); /* Make the compiler happy */ 980 } 981 982 /* 983 * stopit -- 984 * Set the global bit that causes the main loop to quit. 985 * Do NOT call finish() from here, since finish() does far too much 986 * to be called from a signal handler. 987 */ 988 void 989 stopit(int sig __unused) 990 { 991 992 /* 993 * When doing reverse DNS lookups, the finish_up flag might not 994 * be noticed for a while. Just exit if we get a second SIGINT. 995 */ 996 if (!(options & F_NUMERIC) && finish_up) 997 _exit(nreceived ? 0 : 2); 998 finish_up = 1; 999 } 1000 1001 /* 1002 * pinger -- 1003 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1004 * will be added on by the kernel. The ID field is our UNIX process ID, 1005 * and the sequence number is an ascending integer. The first TIMEVAL_LEN 1006 * bytes of the data portion are used to hold a UNIX "timespec" struct in 1007 * host byte-order, to compute the round-trip time. 1008 */ 1009 static void 1010 pinger(void) 1011 { 1012 struct timespec now; 1013 struct tv32 tv32; 1014 struct ip *ip; 1015 struct icmp *icp; 1016 int cc, i; 1017 u_char *packet; 1018 1019 packet = outpack; 1020 icp = (struct icmp *)outpack; 1021 icp->icmp_type = icmp_type; 1022 icp->icmp_code = 0; 1023 icp->icmp_cksum = 0; 1024 icp->icmp_seq = htons(ntransmitted); 1025 icp->icmp_id = ident; /* ID */ 1026 1027 CLR(ntransmitted % mx_dup_ck); 1028 1029 if ((options & F_TIME) || timing) { 1030 (void)clock_gettime(CLOCK_MONOTONIC, &now); 1031 /* 1032 * Truncate seconds down to 32 bits in order 1033 * to fit the timestamp within 8 bytes of the 1034 * packet. We're only concerned with 1035 * durations, not absolute times. 1036 */ 1037 tv32.tv32_sec = (uint32_t)htonl(now.tv_sec); 1038 tv32.tv32_nsec = (uint32_t)htonl(now.tv_nsec); 1039 if (options & F_TIME) 1040 icp->icmp_otime = htonl((now.tv_sec % (24*60*60)) 1041 * 1000 + now.tv_nsec / 1000000); 1042 if (timing) 1043 bcopy((void *)&tv32, 1044 (void *)&outpack[ICMP_MINLEN + phdr_len], 1045 sizeof(tv32)); 1046 } 1047 1048 cc = ICMP_MINLEN + phdr_len + datalen; 1049 1050 /* compute ICMP checksum here */ 1051 icp->icmp_cksum = in_cksum((u_char *)icp, cc); 1052 1053 if (options & F_HDRINCL) { 1054 cc += sizeof(struct ip); 1055 ip = (struct ip *)outpackhdr; 1056 ip->ip_len = htons(cc); 1057 ip->ip_sum = in_cksum(outpackhdr, cc); 1058 packet = outpackhdr; 1059 } 1060 i = send(ssend, (char *)packet, cc, 0); 1061 if (i < 0 || i != cc) { 1062 if (i < 0) { 1063 if (options & F_FLOOD && errno == ENOBUFS) { 1064 usleep(FLOOD_BACKOFF); 1065 return; 1066 } 1067 warn("sendto"); 1068 } else { 1069 warn("%s: partial write: %d of %d bytes", 1070 hostname, i, cc); 1071 } 1072 } 1073 ntransmitted++; 1074 sntransmitted++; 1075 if (!(options & F_QUIET) && options & F_FLOOD) 1076 (void)write(STDOUT_FILENO, &DOT, 1); 1077 } 1078 1079 /* 1080 * pr_pack -- 1081 * Print out the packet, if it came from us. This logic is necessary 1082 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1083 * which arrive ('tis only fair). This permits multiple copies of this 1084 * program to be run without having intermingled output (or statistics!). 1085 */ 1086 static void 1087 pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timespec *tv) 1088 { 1089 struct in_addr ina; 1090 u_char *cp, *dp; 1091 struct icmp *icp; 1092 struct ip *ip; 1093 const void *tp; 1094 double triptime; 1095 int dupflag, hlen, i, j, recv_len; 1096 uint16_t seq; 1097 static int old_rrlen; 1098 static char old_rr[MAX_IPOPTLEN]; 1099 1100 /* Check the IP header */ 1101 ip = (struct ip *)buf; 1102 hlen = ip->ip_hl << 2; 1103 recv_len = cc; 1104 if (cc < hlen + ICMP_MINLEN) { 1105 if (options & F_VERBOSE) 1106 warn("packet too short (%d bytes) from %s", cc, 1107 inet_ntoa(from->sin_addr)); 1108 return; 1109 } 1110 1111 /* Now the ICMP part */ 1112 cc -= hlen; 1113 icp = (struct icmp *)(buf + hlen); 1114 if (icp->icmp_type == icmp_type_rsp) { 1115 if (icp->icmp_id != ident) 1116 return; /* 'Twas not our ECHO */ 1117 ++nreceived; 1118 triptime = 0.0; 1119 if (timing) { 1120 struct timespec tv1; 1121 struct tv32 tv32; 1122 #ifndef icmp_data 1123 tp = &icp->icmp_ip; 1124 #else 1125 tp = icp->icmp_data; 1126 #endif 1127 tp = (const char *)tp + phdr_len; 1128 1129 if ((size_t)(cc - ICMP_MINLEN - phdr_len) >= 1130 sizeof(tv1)) { 1131 /* Copy to avoid alignment problems: */ 1132 memcpy(&tv32, tp, sizeof(tv32)); 1133 tv1.tv_sec = ntohl(tv32.tv32_sec); 1134 tv1.tv_nsec = ntohl(tv32.tv32_nsec); 1135 timespecsub(tv, &tv1, tv); 1136 triptime = ((double)tv->tv_sec) * 1000.0 + 1137 ((double)tv->tv_nsec) / 1000000.0; 1138 tsum += triptime; 1139 tsumsq += triptime * triptime; 1140 if (triptime < tmin) 1141 tmin = triptime; 1142 if (triptime > tmax) 1143 tmax = triptime; 1144 } else 1145 timing = 0; 1146 } 1147 1148 seq = ntohs(icp->icmp_seq); 1149 1150 if (TST(seq % mx_dup_ck)) { 1151 ++nrepeats; 1152 --nreceived; 1153 dupflag = 1; 1154 } else { 1155 SET(seq % mx_dup_ck); 1156 dupflag = 0; 1157 } 1158 1159 if (options & F_QUIET) 1160 return; 1161 1162 if (options & F_WAITTIME && triptime > waittime) { 1163 ++nrcvtimeout; 1164 return; 1165 } 1166 1167 if (options & F_FLOOD) 1168 (void)write(STDOUT_FILENO, &BSPACE, 1); 1169 else { 1170 (void)printf("%d bytes from %s: icmp_seq=%u", cc, 1171 inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr), 1172 seq); 1173 (void)printf(" ttl=%d", ip->ip_ttl); 1174 if (timing) 1175 (void)printf(" time=%.3f ms", triptime); 1176 if (dupflag) 1177 (void)printf(" (DUP!)"); 1178 if (options & F_AUDIBLE) 1179 (void)write(STDOUT_FILENO, &BBELL, 1); 1180 if (options & F_MASK) { 1181 /* Just prentend this cast isn't ugly */ 1182 (void)printf(" mask=%s", 1183 inet_ntoa(*(struct in_addr *)&(icp->icmp_mask))); 1184 } 1185 if (options & F_TIME) { 1186 (void)printf(" tso=%s", pr_ntime(icp->icmp_otime)); 1187 (void)printf(" tsr=%s", pr_ntime(icp->icmp_rtime)); 1188 (void)printf(" tst=%s", pr_ntime(icp->icmp_ttime)); 1189 } 1190 if (recv_len != send_len) { 1191 (void)printf( 1192 "\nwrong total length %d instead of %d", 1193 recv_len, send_len); 1194 } 1195 /* check the data */ 1196 cp = (u_char*)&icp->icmp_data[phdr_len]; 1197 dp = &outpack[ICMP_MINLEN + phdr_len]; 1198 cc -= ICMP_MINLEN + phdr_len; 1199 i = 0; 1200 if (timing) { /* don't check variable timestamp */ 1201 cp += TIMEVAL_LEN; 1202 dp += TIMEVAL_LEN; 1203 cc -= TIMEVAL_LEN; 1204 i += TIMEVAL_LEN; 1205 } 1206 for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) { 1207 if (*cp != *dp) { 1208 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", 1209 i, *dp, *cp); 1210 (void)printf("\ncp:"); 1211 cp = (u_char*)&icp->icmp_data[0]; 1212 for (i = 0; i < datalen; ++i, ++cp) { 1213 if ((i % 16) == 8) 1214 (void)printf("\n\t"); 1215 (void)printf("%2x ", *cp); 1216 } 1217 (void)printf("\ndp:"); 1218 cp = &outpack[ICMP_MINLEN]; 1219 for (i = 0; i < datalen; ++i, ++cp) { 1220 if ((i % 16) == 8) 1221 (void)printf("\n\t"); 1222 (void)printf("%2x ", *cp); 1223 } 1224 break; 1225 } 1226 } 1227 } 1228 } else { 1229 /* 1230 * We've got something other than an ECHOREPLY. 1231 * See if it's a reply to something that we sent. 1232 * We can compare IP destination, protocol, 1233 * and ICMP type and ID. 1234 * 1235 * Only print all the error messages if we are running 1236 * as root to avoid leaking information not normally 1237 * available to those not running as root. 1238 */ 1239 #ifndef icmp_data 1240 struct ip *oip = &icp->icmp_ip; 1241 #else 1242 struct ip *oip = (struct ip *)icp->icmp_data; 1243 #endif 1244 struct icmp *oicmp = (struct icmp *)(oip + 1); 1245 1246 if (((options & F_VERBOSE) && uid == 0) || 1247 (!(options & F_QUIET2) && 1248 (oip->ip_dst.s_addr == whereto.sin_addr.s_addr) && 1249 (oip->ip_p == IPPROTO_ICMP) && 1250 (oicmp->icmp_type == ICMP_ECHO) && 1251 (oicmp->icmp_id == ident))) { 1252 (void)printf("%d bytes from %s: ", cc, 1253 pr_addr(from->sin_addr)); 1254 pr_icmph(icp); 1255 } else 1256 return; 1257 } 1258 1259 /* Display any IP options */ 1260 cp = (u_char *)buf + sizeof(struct ip); 1261 1262 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp) 1263 switch (*cp) { 1264 case IPOPT_EOL: 1265 hlen = 0; 1266 break; 1267 case IPOPT_LSRR: 1268 case IPOPT_SSRR: 1269 (void)printf(*cp == IPOPT_LSRR ? 1270 "\nLSRR: " : "\nSSRR: "); 1271 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1; 1272 hlen -= 2; 1273 cp += 2; 1274 if (j >= INADDR_LEN && 1275 j <= hlen - (int)sizeof(struct ip)) { 1276 for (;;) { 1277 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1278 if (ina.s_addr == 0) 1279 (void)printf("\t0.0.0.0"); 1280 else 1281 (void)printf("\t%s", 1282 pr_addr(ina)); 1283 hlen -= INADDR_LEN; 1284 cp += INADDR_LEN - 1; 1285 j -= INADDR_LEN; 1286 if (j < INADDR_LEN) 1287 break; 1288 (void)putchar('\n'); 1289 } 1290 } else 1291 (void)printf("\t(truncated route)\n"); 1292 break; 1293 case IPOPT_RR: 1294 j = cp[IPOPT_OLEN]; /* get length */ 1295 i = cp[IPOPT_OFFSET]; /* and pointer */ 1296 hlen -= 2; 1297 cp += 2; 1298 if (i > j) 1299 i = j; 1300 i = i - IPOPT_MINOFF + 1; 1301 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) { 1302 old_rrlen = 0; 1303 continue; 1304 } 1305 if (i == old_rrlen 1306 && !bcmp((char *)cp, old_rr, i) 1307 && !(options & F_FLOOD)) { 1308 (void)printf("\t(same route)"); 1309 hlen -= i; 1310 cp += i; 1311 break; 1312 } 1313 old_rrlen = i; 1314 bcopy((char *)cp, old_rr, i); 1315 (void)printf("\nRR: "); 1316 if (i >= INADDR_LEN && 1317 i <= hlen - (int)sizeof(struct ip)) { 1318 for (;;) { 1319 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1320 if (ina.s_addr == 0) 1321 (void)printf("\t0.0.0.0"); 1322 else 1323 (void)printf("\t%s", 1324 pr_addr(ina)); 1325 hlen -= INADDR_LEN; 1326 cp += INADDR_LEN - 1; 1327 i -= INADDR_LEN; 1328 if (i < INADDR_LEN) 1329 break; 1330 (void)putchar('\n'); 1331 } 1332 } else 1333 (void)printf("\t(truncated route)"); 1334 break; 1335 case IPOPT_NOP: 1336 (void)printf("\nNOP"); 1337 break; 1338 default: 1339 (void)printf("\nunknown option %x", *cp); 1340 break; 1341 } 1342 if (!(options & F_FLOOD)) { 1343 (void)putchar('\n'); 1344 (void)fflush(stdout); 1345 } 1346 } 1347 1348 /* 1349 * status -- 1350 * Print out statistics when SIGINFO is received. 1351 */ 1352 1353 static void 1354 status(int sig __unused) 1355 { 1356 1357 siginfo_p = 1; 1358 } 1359 1360 static void 1361 check_status(void) 1362 { 1363 1364 if (siginfo_p) { 1365 siginfo_p = 0; 1366 (void)fprintf(stderr, "\r%ld/%ld packets received (%.1f%%)", 1367 nreceived, ntransmitted, 1368 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0); 1369 if (nreceived && timing) 1370 (void)fprintf(stderr, " %.3f min / %.3f avg / %.3f max", 1371 tmin, tsum / (nreceived + nrepeats), tmax); 1372 (void)fprintf(stderr, "\n"); 1373 } 1374 } 1375 1376 /* 1377 * finish -- 1378 * Print out statistics, and give up. 1379 */ 1380 static void 1381 finish(void) 1382 { 1383 1384 (void)signal(SIGINT, SIG_IGN); 1385 (void)signal(SIGALRM, SIG_IGN); 1386 (void)putchar('\n'); 1387 (void)fflush(stdout); 1388 (void)printf("--- %s ping statistics ---\n", hostname); 1389 (void)printf("%ld packets transmitted, ", ntransmitted); 1390 (void)printf("%ld packets received, ", nreceived); 1391 if (nrepeats) 1392 (void)printf("+%ld duplicates, ", nrepeats); 1393 if (ntransmitted) { 1394 if (nreceived > ntransmitted) 1395 (void)printf("-- somebody's printing up packets!"); 1396 else 1397 (void)printf("%.1f%% packet loss", 1398 ((ntransmitted - nreceived) * 100.0) / 1399 ntransmitted); 1400 } 1401 if (nrcvtimeout) 1402 (void)printf(", %ld packets out of wait time", nrcvtimeout); 1403 (void)putchar('\n'); 1404 if (nreceived && timing) { 1405 double n = nreceived + nrepeats; 1406 double avg = tsum / n; 1407 double vari = tsumsq / n - avg * avg; 1408 (void)printf( 1409 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", 1410 tmin, avg, tmax, sqrt(vari)); 1411 } 1412 1413 if (nreceived) 1414 exit(0); 1415 else 1416 exit(2); 1417 } 1418 1419 #ifdef notdef 1420 static char *ttab[] = { 1421 "Echo Reply", /* ip + seq + udata */ 1422 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */ 1423 "Source Quench", /* IP */ 1424 "Redirect", /* redirect type, gateway, + IP */ 1425 "Echo", 1426 "Time Exceeded", /* transit, frag reassem + IP */ 1427 "Parameter Problem", /* pointer + IP */ 1428 "Timestamp", /* id + seq + three timestamps */ 1429 "Timestamp Reply", /* " */ 1430 "Info Request", /* id + sq */ 1431 "Info Reply" /* " */ 1432 }; 1433 #endif 1434 1435 /* 1436 * pr_icmph -- 1437 * Print a descriptive string about an ICMP header. 1438 */ 1439 static void 1440 pr_icmph(struct icmp *icp) 1441 { 1442 1443 switch(icp->icmp_type) { 1444 case ICMP_ECHOREPLY: 1445 (void)printf("Echo Reply\n"); 1446 /* XXX ID + Seq + Data */ 1447 break; 1448 case ICMP_UNREACH: 1449 switch(icp->icmp_code) { 1450 case ICMP_UNREACH_NET: 1451 (void)printf("Destination Net Unreachable\n"); 1452 break; 1453 case ICMP_UNREACH_HOST: 1454 (void)printf("Destination Host Unreachable\n"); 1455 break; 1456 case ICMP_UNREACH_PROTOCOL: 1457 (void)printf("Destination Protocol Unreachable\n"); 1458 break; 1459 case ICMP_UNREACH_PORT: 1460 (void)printf("Destination Port Unreachable\n"); 1461 break; 1462 case ICMP_UNREACH_NEEDFRAG: 1463 (void)printf("frag needed and DF set (MTU %d)\n", 1464 ntohs(icp->icmp_nextmtu)); 1465 break; 1466 case ICMP_UNREACH_SRCFAIL: 1467 (void)printf("Source Route Failed\n"); 1468 break; 1469 case ICMP_UNREACH_FILTER_PROHIB: 1470 (void)printf("Communication prohibited by filter\n"); 1471 break; 1472 default: 1473 (void)printf("Dest Unreachable, Bad Code: %d\n", 1474 icp->icmp_code); 1475 break; 1476 } 1477 /* Print returned IP header information */ 1478 #ifndef icmp_data 1479 pr_retip(&icp->icmp_ip); 1480 #else 1481 pr_retip((struct ip *)icp->icmp_data); 1482 #endif 1483 break; 1484 case ICMP_SOURCEQUENCH: 1485 (void)printf("Source Quench\n"); 1486 #ifndef icmp_data 1487 pr_retip(&icp->icmp_ip); 1488 #else 1489 pr_retip((struct ip *)icp->icmp_data); 1490 #endif 1491 break; 1492 case ICMP_REDIRECT: 1493 switch(icp->icmp_code) { 1494 case ICMP_REDIRECT_NET: 1495 (void)printf("Redirect Network"); 1496 break; 1497 case ICMP_REDIRECT_HOST: 1498 (void)printf("Redirect Host"); 1499 break; 1500 case ICMP_REDIRECT_TOSNET: 1501 (void)printf("Redirect Type of Service and Network"); 1502 break; 1503 case ICMP_REDIRECT_TOSHOST: 1504 (void)printf("Redirect Type of Service and Host"); 1505 break; 1506 default: 1507 (void)printf("Redirect, Bad Code: %d", icp->icmp_code); 1508 break; 1509 } 1510 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr)); 1511 #ifndef icmp_data 1512 pr_retip(&icp->icmp_ip); 1513 #else 1514 pr_retip((struct ip *)icp->icmp_data); 1515 #endif 1516 break; 1517 case ICMP_ECHO: 1518 (void)printf("Echo Request\n"); 1519 /* XXX ID + Seq + Data */ 1520 break; 1521 case ICMP_TIMXCEED: 1522 switch(icp->icmp_code) { 1523 case ICMP_TIMXCEED_INTRANS: 1524 (void)printf("Time to live exceeded\n"); 1525 break; 1526 case ICMP_TIMXCEED_REASS: 1527 (void)printf("Frag reassembly time exceeded\n"); 1528 break; 1529 default: 1530 (void)printf("Time exceeded, Bad Code: %d\n", 1531 icp->icmp_code); 1532 break; 1533 } 1534 #ifndef icmp_data 1535 pr_retip(&icp->icmp_ip); 1536 #else 1537 pr_retip((struct ip *)icp->icmp_data); 1538 #endif 1539 break; 1540 case ICMP_PARAMPROB: 1541 (void)printf("Parameter problem: pointer = 0x%02x\n", 1542 icp->icmp_hun.ih_pptr); 1543 #ifndef icmp_data 1544 pr_retip(&icp->icmp_ip); 1545 #else 1546 pr_retip((struct ip *)icp->icmp_data); 1547 #endif 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 */ 1586 static void 1587 pr_iph(struct ip *ip) 1588 { 1589 struct in_addr ina; 1590 u_char *cp; 1591 int hlen; 1592 1593 hlen = ip->ip_hl << 2; 1594 cp = (u_char *)ip + 20; /* point to options */ 1595 1596 (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1597 (void)printf(" %1x %1x %02x %04x %04x", 1598 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len), 1599 ntohs(ip->ip_id)); 1600 (void)printf(" %1lx %04lx", 1601 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13, 1602 (u_long) ntohl(ip->ip_off) & 0x1fff); 1603 (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, 1604 ntohs(ip->ip_sum)); 1605 memcpy(&ina, &ip->ip_src.s_addr, sizeof ina); 1606 (void)printf(" %s ", inet_ntoa(ina)); 1607 memcpy(&ina, &ip->ip_dst.s_addr, sizeof ina); 1608 (void)printf(" %s ", inet_ntoa(ina)); 1609 /* dump any option bytes */ 1610 while (hlen-- > 20) { 1611 (void)printf("%02x", *cp++); 1612 } 1613 (void)putchar('\n'); 1614 } 1615 1616 /* 1617 * pr_addr -- 1618 * Return an ascii host address as a dotted quad and optionally with 1619 * a hostname. 1620 */ 1621 static char * 1622 pr_addr(struct in_addr ina) 1623 { 1624 struct hostent *hp; 1625 static char buf[16 + 3 + MAXHOSTNAMELEN]; 1626 1627 if (options & F_NUMERIC) 1628 return inet_ntoa(ina); 1629 1630 hp = cap_gethostbyaddr(capdns, (char *)&ina, 4, AF_INET); 1631 1632 if (hp == NULL) 1633 return inet_ntoa(ina); 1634 1635 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1636 inet_ntoa(ina)); 1637 return(buf); 1638 } 1639 1640 /* 1641 * pr_retip -- 1642 * Dump some info on a returned (via ICMP) IP packet. 1643 */ 1644 static void 1645 pr_retip(struct ip *ip) 1646 { 1647 u_char *cp; 1648 int hlen; 1649 1650 pr_iph(ip); 1651 hlen = ip->ip_hl << 2; 1652 cp = (u_char *)ip + hlen; 1653 1654 if (ip->ip_p == 6) 1655 (void)printf("TCP: from port %u, to port %u (decimal)\n", 1656 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1657 else if (ip->ip_p == 17) 1658 (void)printf("UDP: from port %u, to port %u (decimal)\n", 1659 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1660 } 1661 1662 static char * 1663 pr_ntime(n_time timestamp) 1664 { 1665 static char buf[11]; 1666 int hour, min, sec; 1667 1668 sec = ntohl(timestamp) / 1000; 1669 hour = sec / 60 / 60; 1670 min = (sec % (60 * 60)) / 60; 1671 sec = (sec % (60 * 60)) % 60; 1672 1673 (void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec); 1674 1675 return (buf); 1676 } 1677 1678 static void 1679 fill(char *bp, char *patp) 1680 { 1681 char *cp; 1682 int pat[16]; 1683 u_int ii, jj, kk; 1684 1685 for (cp = patp; *cp; cp++) { 1686 if (!isxdigit(*cp)) 1687 errx(EX_USAGE, 1688 "patterns must be specified as hex digits"); 1689 1690 } 1691 ii = sscanf(patp, 1692 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1693 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 1694 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 1695 &pat[13], &pat[14], &pat[15]); 1696 1697 if (ii > 0) 1698 for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii) 1699 for (jj = 0; jj < ii; ++jj) 1700 bp[jj + kk] = pat[jj]; 1701 if (!(options & F_QUIET)) { 1702 (void)printf("PATTERN: 0x"); 1703 for (jj = 0; jj < ii; ++jj) 1704 (void)printf("%02x", bp[jj] & 0xFF); 1705 (void)printf("\n"); 1706 } 1707 } 1708 1709 static cap_channel_t * 1710 capdns_setup(void) 1711 { 1712 cap_channel_t *capcas, *capdnsloc; 1713 #ifdef WITH_CASPER 1714 const char *types[2]; 1715 int families[1]; 1716 #endif 1717 capcas = cap_init(); 1718 if (capcas == NULL) 1719 err(1, "unable to create casper process"); 1720 capdnsloc = cap_service_open(capcas, "system.dns"); 1721 /* Casper capability no longer needed. */ 1722 cap_close(capcas); 1723 if (capdnsloc == NULL) 1724 err(1, "unable to open system.dns service"); 1725 #ifdef WITH_CASPER 1726 types[0] = "NAME2ADDR"; 1727 types[1] = "ADDR2NAME"; 1728 if (cap_dns_type_limit(capdnsloc, types, 2) < 0) 1729 err(1, "unable to limit access to system.dns service"); 1730 families[0] = AF_INET; 1731 if (cap_dns_family_limit(capdnsloc, families, 1) < 0) 1732 err(1, "unable to limit access to system.dns service"); 1733 #endif 1734 return (capdnsloc); 1735 } 1736 1737 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 1738 #define SECOPT " [-P policy]" 1739 #else 1740 #define SECOPT "" 1741 #endif 1742 static void 1743 usage(void) 1744 { 1745 1746 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 1747 "usage: ping [-AaDdfnoQqRrv] [-c count] [-G sweepmaxsize] [-g sweepminsize]", 1748 " [-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]", 1749 " " SECOPT " [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]", 1750 " [-W waittime] [-z tos] host", 1751 " ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]", 1752 " [-M mask | time] [-m ttl]" SECOPT " [-p pattern] [-S src_addr]", 1753 " [-s packetsize] [-T ttl] [-t timeout] [-W waittime]", 1754 " [-z tos] mcast-group"); 1755 exit(EX_USAGE); 1756 } 1757