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 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 ip = (struct ip*)outpackhdr; 691 if (!(options & (F_TTL | F_MTTL))) { 692 mib[0] = CTL_NET; 693 mib[1] = PF_INET; 694 mib[2] = IPPROTO_IP; 695 mib[3] = IPCTL_DEFTTL; 696 sz = sizeof(ttl); 697 if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1) 698 err(1, "sysctl(net.inet.ip.ttl)"); 699 } 700 setsockopt(ssend, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold)); 701 ip->ip_v = IPVERSION; 702 ip->ip_hl = sizeof(struct ip) >> 2; 703 ip->ip_tos = tos; 704 ip->ip_id = 0; 705 ip->ip_off = htons(df ? IP_DF : 0); 706 ip->ip_ttl = ttl; 707 ip->ip_p = IPPROTO_ICMP; 708 ip->ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY; 709 ip->ip_dst = to->sin_addr; 710 } 711 712 /* 713 * Here we enter capability mode. Further down access to global 714 * namespaces (e.g filesystem) is restricted (see capsicum(4)). 715 * We must connect(2) our socket before this point. 716 */ 717 caph_cache_catpages(); 718 if (caph_enter_casper() < 0) 719 err(1, "cap_enter"); 720 721 cap_rights_init(&rights, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT); 722 if (caph_rights_limit(srecv, &rights) < 0) 723 err(1, "cap_rights_limit srecv"); 724 cap_rights_init(&rights, CAP_SEND, CAP_SETSOCKOPT); 725 if (caph_rights_limit(ssend, &rights) < 0) 726 err(1, "cap_rights_limit ssend"); 727 728 /* record route option */ 729 if (options & F_RROUTE) { 730 #ifdef IP_OPTIONS 731 bzero(rspace, sizeof(rspace)); 732 rspace[IPOPT_OPTVAL] = IPOPT_RR; 733 rspace[IPOPT_OLEN] = sizeof(rspace) - 1; 734 rspace[IPOPT_OFFSET] = IPOPT_MINOFF; 735 rspace[sizeof(rspace) - 1] = IPOPT_EOL; 736 if (setsockopt(ssend, IPPROTO_IP, IP_OPTIONS, rspace, 737 sizeof(rspace)) < 0) 738 err(EX_OSERR, "setsockopt IP_OPTIONS"); 739 #else 740 errx(EX_UNAVAILABLE, 741 "record route not available in this implementation"); 742 #endif /* IP_OPTIONS */ 743 } 744 745 if (options & F_TTL) { 746 if (setsockopt(ssend, IPPROTO_IP, IP_TTL, &ttl, 747 sizeof(ttl)) < 0) { 748 err(EX_OSERR, "setsockopt IP_TTL"); 749 } 750 } 751 if (options & F_NOLOOP) { 752 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, 753 sizeof(loop)) < 0) { 754 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP"); 755 } 756 } 757 if (options & F_MTTL) { 758 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_TTL, &mttl, 759 sizeof(mttl)) < 0) { 760 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL"); 761 } 762 } 763 if (options & F_MIF) { 764 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr, 765 sizeof(ifaddr)) < 0) { 766 err(EX_OSERR, "setsockopt IP_MULTICAST_IF"); 767 } 768 } 769 #ifdef SO_TIMESTAMP 770 { 771 int on = 1; 772 int ts_clock = SO_TS_MONOTONIC; 773 if (setsockopt(srecv, SOL_SOCKET, SO_TIMESTAMP, &on, 774 sizeof(on)) < 0) 775 err(EX_OSERR, "setsockopt SO_TIMESTAMP"); 776 if (setsockopt(srecv, SOL_SOCKET, SO_TS_CLOCK, &ts_clock, 777 sizeof(ts_clock)) < 0) 778 err(EX_OSERR, "setsockopt SO_TS_CLOCK"); 779 } 780 #endif 781 if (sweepmax) { 782 if (sweepmin > sweepmax) 783 errx(EX_USAGE, "Maximum packet size must be no less than the minimum packet size"); 784 785 if (datalen != DEFDATALEN) 786 errx(EX_USAGE, "Packet size and ping sweep are mutually exclusive"); 787 788 if (npackets > 0) { 789 snpackets = npackets; 790 npackets = 0; 791 } else 792 snpackets = 1; 793 datalen = sweepmin; 794 send_len = icmp_len + sweepmin; 795 } 796 if (options & F_SWEEP && !sweepmax) 797 errx(EX_USAGE, "Maximum sweep size must be specified"); 798 799 /* 800 * When pinging the broadcast address, you can get a lot of answers. 801 * Doing something so evil is useful if you are trying to stress the 802 * ethernet, or just want to fill the arp cache to get some stuff for 803 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast 804 * or multicast pings if they wish. 805 */ 806 807 /* 808 * XXX receive buffer needs undetermined space for mbuf overhead 809 * as well. 810 */ 811 hold = IP_MAXPACKET + 128; 812 (void)setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 813 sizeof(hold)); 814 /* CAP_SETSOCKOPT removed */ 815 cap_rights_init(&rights, CAP_RECV, CAP_EVENT); 816 if (caph_rights_limit(srecv, &rights) < 0) 817 err(1, "cap_rights_limit srecv setsockopt"); 818 if (uid == 0) 819 (void)setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, (char *)&hold, 820 sizeof(hold)); 821 /* CAP_SETSOCKOPT removed */ 822 cap_rights_init(&rights, CAP_SEND); 823 if (caph_rights_limit(ssend, &rights) < 0) 824 err(1, "cap_rights_limit ssend setsockopt"); 825 826 if (to->sin_family == AF_INET) { 827 (void)printf("PING %s (%s)", hostname, 828 inet_ntoa(to->sin_addr)); 829 if (source) 830 (void)printf(" from %s", shostname); 831 if (sweepmax) 832 (void)printf(": (%d ... %d) data bytes\n", 833 sweepmin, sweepmax); 834 else 835 (void)printf(": %d data bytes\n", datalen); 836 837 } else { 838 if (sweepmax) 839 (void)printf("PING %s: (%d ... %d) data bytes\n", 840 hostname, sweepmin, sweepmax); 841 else 842 (void)printf("PING %s: %d data bytes\n", hostname, datalen); 843 } 844 845 /* 846 * Use sigaction() instead of signal() to get unambiguous semantics, 847 * in particular with SA_RESTART not set. 848 */ 849 850 sigemptyset(&si_sa.sa_mask); 851 si_sa.sa_flags = 0; 852 853 si_sa.sa_handler = stopit; 854 if (sigaction(SIGINT, &si_sa, 0) == -1) { 855 err(EX_OSERR, "sigaction SIGINT"); 856 } 857 858 si_sa.sa_handler = status; 859 if (sigaction(SIGINFO, &si_sa, 0) == -1) { 860 err(EX_OSERR, "sigaction"); 861 } 862 863 if (alarmtimeout > 0) { 864 si_sa.sa_handler = stopit; 865 if (sigaction(SIGALRM, &si_sa, 0) == -1) 866 err(EX_OSERR, "sigaction SIGALRM"); 867 } 868 869 bzero(&msg, sizeof(msg)); 870 msg.msg_name = (caddr_t)&from; 871 msg.msg_iov = &iov; 872 msg.msg_iovlen = 1; 873 #ifdef SO_TIMESTAMP 874 msg.msg_control = (caddr_t)ctrl; 875 #endif 876 iov.iov_base = packet; 877 iov.iov_len = IP_MAXPACKET; 878 879 if (preload == 0) 880 pinger(); /* send the first ping */ 881 else { 882 if (npackets != 0 && preload > npackets) 883 preload = npackets; 884 while (preload--) /* fire off them quickies */ 885 pinger(); 886 } 887 (void)clock_gettime(CLOCK_MONOTONIC, &last); 888 889 if (options & F_FLOOD) { 890 intvl.tv_sec = 0; 891 intvl.tv_nsec = 10000000; 892 } else { 893 intvl.tv_sec = interval / 1000; 894 intvl.tv_nsec = interval % 1000 * 1000000; 895 } 896 897 almost_done = 0; 898 while (!finish_up) { 899 struct timespec now, timeout; 900 fd_set rfds; 901 int cc, n; 902 903 check_status(); 904 if ((unsigned)srecv >= FD_SETSIZE) 905 errx(EX_OSERR, "descriptor too large"); 906 FD_ZERO(&rfds); 907 FD_SET(srecv, &rfds); 908 (void)clock_gettime(CLOCK_MONOTONIC, &now); 909 timespecadd(&last, &intvl, &timeout); 910 timespecsub(&timeout, &now, &timeout); 911 if (timeout.tv_sec < 0) 912 timespecclear(&timeout); 913 n = pselect(srecv + 1, &rfds, NULL, NULL, &timeout, NULL); 914 if (n < 0) 915 continue; /* Must be EINTR. */ 916 if (n == 1) { 917 struct timespec *tv = NULL; 918 #ifdef SO_TIMESTAMP 919 struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl; 920 921 msg.msg_controllen = sizeof(ctrl); 922 #endif 923 msg.msg_namelen = sizeof(from); 924 if ((cc = recvmsg(srecv, &msg, 0)) < 0) { 925 if (errno == EINTR) 926 continue; 927 warn("recvmsg"); 928 continue; 929 } 930 #ifdef SO_TIMESTAMP 931 if (cmsg->cmsg_level == SOL_SOCKET && 932 cmsg->cmsg_type == SCM_TIMESTAMP && 933 cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) { 934 /* Copy to avoid alignment problems: */ 935 memcpy(&now, CMSG_DATA(cmsg), sizeof(now)); 936 tv = &now; 937 } 938 #endif 939 if (tv == NULL) { 940 (void)clock_gettime(CLOCK_MONOTONIC, &now); 941 tv = &now; 942 } 943 pr_pack((char *)packet, cc, &from, tv); 944 if ((options & F_ONCE && nreceived) || 945 (npackets && nreceived >= npackets)) 946 break; 947 } 948 if (n == 0 || options & F_FLOOD) { 949 if (sweepmax && sntransmitted == snpackets) { 950 for (i = 0; i < sweepincr ; ++i) 951 *datap++ = i; 952 datalen += sweepincr; 953 if (datalen > sweepmax) 954 break; 955 send_len = icmp_len + datalen; 956 sntransmitted = 0; 957 } 958 if (!npackets || ntransmitted < npackets) 959 pinger(); 960 else { 961 if (almost_done) 962 break; 963 almost_done = 1; 964 intvl.tv_nsec = 0; 965 if (nreceived) { 966 intvl.tv_sec = 2 * tmax / 1000; 967 if (!intvl.tv_sec) 968 intvl.tv_sec = 1; 969 } else { 970 intvl.tv_sec = waittime / 1000; 971 intvl.tv_nsec = waittime % 1000 * 1000000; 972 } 973 } 974 (void)clock_gettime(CLOCK_MONOTONIC, &last); 975 if (ntransmitted - nreceived - 1 > nmissedmax) { 976 nmissedmax = ntransmitted - nreceived - 1; 977 if (options & F_MISSED) 978 (void)write(STDOUT_FILENO, &BBELL, 1); 979 } 980 } 981 } 982 finish(); 983 /* NOTREACHED */ 984 exit(0); /* Make the compiler happy */ 985 } 986 987 /* 988 * stopit -- 989 * Set the global bit that causes the main loop to quit. 990 * Do NOT call finish() from here, since finish() does far too much 991 * to be called from a signal handler. 992 */ 993 void 994 stopit(int sig __unused) 995 { 996 997 /* 998 * When doing reverse DNS lookups, the finish_up flag might not 999 * be noticed for a while. Just exit if we get a second SIGINT. 1000 */ 1001 if (!(options & F_NUMERIC) && finish_up) 1002 _exit(nreceived ? 0 : 2); 1003 finish_up = 1; 1004 } 1005 1006 /* 1007 * pinger -- 1008 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1009 * will be added on by the kernel. The ID field is our UNIX process ID, 1010 * and the sequence number is an ascending integer. The first TIMEVAL_LEN 1011 * bytes of the data portion are used to hold a UNIX "timespec" struct in 1012 * host byte-order, to compute the round-trip time. 1013 */ 1014 static void 1015 pinger(void) 1016 { 1017 struct timespec now; 1018 struct tv32 tv32; 1019 struct ip *ip; 1020 struct icmp *icp; 1021 int cc, i; 1022 u_char *packet; 1023 1024 packet = outpack; 1025 icp = (struct icmp *)outpack; 1026 icp->icmp_type = icmp_type; 1027 icp->icmp_code = 0; 1028 icp->icmp_cksum = 0; 1029 icp->icmp_seq = htons(ntransmitted); 1030 icp->icmp_id = ident; /* ID */ 1031 1032 CLR(ntransmitted % mx_dup_ck); 1033 1034 if ((options & F_TIME) || timing) { 1035 (void)clock_gettime(CLOCK_MONOTONIC, &now); 1036 /* 1037 * Truncate seconds down to 32 bits in order 1038 * to fit the timestamp within 8 bytes of the 1039 * packet. We're only concerned with 1040 * durations, not absolute times. 1041 */ 1042 tv32.tv32_sec = (uint32_t)htonl(now.tv_sec); 1043 tv32.tv32_nsec = (uint32_t)htonl(now.tv_nsec); 1044 if (options & F_TIME) 1045 icp->icmp_otime = htonl((now.tv_sec % (24*60*60)) 1046 * 1000 + now.tv_nsec / 1000000); 1047 if (timing) 1048 bcopy((void *)&tv32, 1049 (void *)&outpack[ICMP_MINLEN + phdr_len], 1050 sizeof(tv32)); 1051 } 1052 1053 cc = ICMP_MINLEN + phdr_len + datalen; 1054 1055 /* compute ICMP checksum here */ 1056 icp->icmp_cksum = in_cksum((u_char *)icp, cc); 1057 1058 if (options & F_HDRINCL) { 1059 cc += sizeof(struct ip); 1060 ip = (struct ip *)outpackhdr; 1061 ip->ip_len = htons(cc); 1062 ip->ip_sum = in_cksum(outpackhdr, cc); 1063 packet = outpackhdr; 1064 } 1065 i = send(ssend, (char *)packet, cc, 0); 1066 if (i < 0 || i != cc) { 1067 if (i < 0) { 1068 if (options & F_FLOOD && errno == ENOBUFS) { 1069 usleep(FLOOD_BACKOFF); 1070 return; 1071 } 1072 warn("sendto"); 1073 } else { 1074 warn("%s: partial write: %d of %d bytes", 1075 hostname, i, cc); 1076 } 1077 } 1078 ntransmitted++; 1079 sntransmitted++; 1080 if (!(options & F_QUIET) && options & F_FLOOD) 1081 (void)write(STDOUT_FILENO, &DOT, 1); 1082 } 1083 1084 /* 1085 * pr_pack -- 1086 * Print out the packet, if it came from us. This logic is necessary 1087 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1088 * which arrive ('tis only fair). This permits multiple copies of this 1089 * program to be run without having intermingled output (or statistics!). 1090 */ 1091 static void 1092 pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timespec *tv) 1093 { 1094 struct in_addr ina; 1095 u_char *cp, *dp; 1096 struct icmp *icp; 1097 struct ip *ip; 1098 const void *tp; 1099 double triptime; 1100 int dupflag, hlen, i, j, recv_len; 1101 uint16_t seq; 1102 static int old_rrlen; 1103 static char old_rr[MAX_IPOPTLEN]; 1104 1105 /* Check the IP header */ 1106 ip = (struct ip *)buf; 1107 hlen = ip->ip_hl << 2; 1108 recv_len = cc; 1109 if (cc < hlen + ICMP_MINLEN) { 1110 if (options & F_VERBOSE) 1111 warn("packet too short (%d bytes) from %s", cc, 1112 inet_ntoa(from->sin_addr)); 1113 return; 1114 } 1115 1116 /* Now the ICMP part */ 1117 cc -= hlen; 1118 icp = (struct icmp *)(buf + hlen); 1119 if (icp->icmp_type == icmp_type_rsp) { 1120 if (icp->icmp_id != ident) 1121 return; /* 'Twas not our ECHO */ 1122 ++nreceived; 1123 triptime = 0.0; 1124 if (timing) { 1125 struct timespec tv1; 1126 struct tv32 tv32; 1127 #ifndef icmp_data 1128 tp = &icp->icmp_ip; 1129 #else 1130 tp = icp->icmp_data; 1131 #endif 1132 tp = (const char *)tp + phdr_len; 1133 1134 if ((size_t)(cc - ICMP_MINLEN - phdr_len) >= 1135 sizeof(tv1)) { 1136 /* Copy to avoid alignment problems: */ 1137 memcpy(&tv32, tp, sizeof(tv32)); 1138 tv1.tv_sec = ntohl(tv32.tv32_sec); 1139 tv1.tv_nsec = ntohl(tv32.tv32_nsec); 1140 timespecsub(tv, &tv1, tv); 1141 triptime = ((double)tv->tv_sec) * 1000.0 + 1142 ((double)tv->tv_nsec) / 1000000.0; 1143 tsum += triptime; 1144 tsumsq += triptime * triptime; 1145 if (triptime < tmin) 1146 tmin = triptime; 1147 if (triptime > tmax) 1148 tmax = triptime; 1149 } else 1150 timing = 0; 1151 } 1152 1153 seq = ntohs(icp->icmp_seq); 1154 1155 if (TST(seq % mx_dup_ck)) { 1156 ++nrepeats; 1157 --nreceived; 1158 dupflag = 1; 1159 } else { 1160 SET(seq % mx_dup_ck); 1161 dupflag = 0; 1162 } 1163 1164 if (options & F_QUIET) 1165 return; 1166 1167 if (options & F_WAITTIME && triptime > waittime) { 1168 ++nrcvtimeout; 1169 return; 1170 } 1171 1172 if (options & F_FLOOD) 1173 (void)write(STDOUT_FILENO, &BSPACE, 1); 1174 else { 1175 (void)printf("%d bytes from %s: icmp_seq=%u", cc, 1176 pr_addr(from->sin_addr), seq); 1177 (void)printf(" ttl=%d", ip->ip_ttl); 1178 if (timing) 1179 (void)printf(" time=%.3f ms", triptime); 1180 if (dupflag) 1181 (void)printf(" (DUP!)"); 1182 if (options & F_AUDIBLE) 1183 (void)write(STDOUT_FILENO, &BBELL, 1); 1184 if (options & F_MASK) { 1185 /* Just prentend this cast isn't ugly */ 1186 (void)printf(" mask=%s", 1187 inet_ntoa(*(struct in_addr *)&(icp->icmp_mask))); 1188 } 1189 if (options & F_TIME) { 1190 (void)printf(" tso=%s", pr_ntime(icp->icmp_otime)); 1191 (void)printf(" tsr=%s", pr_ntime(icp->icmp_rtime)); 1192 (void)printf(" tst=%s", pr_ntime(icp->icmp_ttime)); 1193 } 1194 if (recv_len != send_len) { 1195 (void)printf( 1196 "\nwrong total length %d instead of %d", 1197 recv_len, send_len); 1198 } 1199 /* check the data */ 1200 cp = (u_char*)&icp->icmp_data[phdr_len]; 1201 dp = &outpack[ICMP_MINLEN + phdr_len]; 1202 cc -= ICMP_MINLEN + phdr_len; 1203 i = 0; 1204 if (timing) { /* don't check variable timestamp */ 1205 cp += TIMEVAL_LEN; 1206 dp += TIMEVAL_LEN; 1207 cc -= TIMEVAL_LEN; 1208 i += TIMEVAL_LEN; 1209 } 1210 for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) { 1211 if (*cp != *dp) { 1212 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", 1213 i, *dp, *cp); 1214 (void)printf("\ncp:"); 1215 cp = (u_char*)&icp->icmp_data[0]; 1216 for (i = 0; i < datalen; ++i, ++cp) { 1217 if ((i % 16) == 8) 1218 (void)printf("\n\t"); 1219 (void)printf("%2x ", *cp); 1220 } 1221 (void)printf("\ndp:"); 1222 cp = &outpack[ICMP_MINLEN]; 1223 for (i = 0; i < datalen; ++i, ++cp) { 1224 if ((i % 16) == 8) 1225 (void)printf("\n\t"); 1226 (void)printf("%2x ", *cp); 1227 } 1228 break; 1229 } 1230 } 1231 } 1232 } else { 1233 /* 1234 * We've got something other than an ECHOREPLY. 1235 * See if it's a reply to something that we sent. 1236 * We can compare IP destination, protocol, 1237 * and ICMP type and ID. 1238 * 1239 * Only print all the error messages if we are running 1240 * as root to avoid leaking information not normally 1241 * available to those not running as root. 1242 */ 1243 #ifndef icmp_data 1244 struct ip *oip = &icp->icmp_ip; 1245 #else 1246 struct ip *oip = (struct ip *)icp->icmp_data; 1247 #endif 1248 struct icmp *oicmp = (struct icmp *)(oip + 1); 1249 1250 if (((options & F_VERBOSE) && uid == 0) || 1251 (!(options & F_QUIET2) && 1252 (oip->ip_dst.s_addr == whereto.sin_addr.s_addr) && 1253 (oip->ip_p == IPPROTO_ICMP) && 1254 (oicmp->icmp_type == ICMP_ECHO) && 1255 (oicmp->icmp_id == ident))) { 1256 (void)printf("%d bytes from %s: ", cc, 1257 pr_addr(from->sin_addr)); 1258 pr_icmph(icp); 1259 } else 1260 return; 1261 } 1262 1263 /* Display any IP options */ 1264 cp = (u_char *)buf + sizeof(struct ip); 1265 1266 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp) 1267 switch (*cp) { 1268 case IPOPT_EOL: 1269 hlen = 0; 1270 break; 1271 case IPOPT_LSRR: 1272 case IPOPT_SSRR: 1273 (void)printf(*cp == IPOPT_LSRR ? 1274 "\nLSRR: " : "\nSSRR: "); 1275 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1; 1276 hlen -= 2; 1277 cp += 2; 1278 if (j >= INADDR_LEN && 1279 j <= hlen - (int)sizeof(struct ip)) { 1280 for (;;) { 1281 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1282 if (ina.s_addr == 0) 1283 (void)printf("\t0.0.0.0"); 1284 else 1285 (void)printf("\t%s", 1286 pr_addr(ina)); 1287 hlen -= INADDR_LEN; 1288 cp += INADDR_LEN - 1; 1289 j -= INADDR_LEN; 1290 if (j < INADDR_LEN) 1291 break; 1292 (void)putchar('\n'); 1293 } 1294 } else 1295 (void)printf("\t(truncated route)\n"); 1296 break; 1297 case IPOPT_RR: 1298 j = cp[IPOPT_OLEN]; /* get length */ 1299 i = cp[IPOPT_OFFSET]; /* and pointer */ 1300 hlen -= 2; 1301 cp += 2; 1302 if (i > j) 1303 i = j; 1304 i = i - IPOPT_MINOFF + 1; 1305 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) { 1306 old_rrlen = 0; 1307 continue; 1308 } 1309 if (i == old_rrlen 1310 && !bcmp((char *)cp, old_rr, i) 1311 && !(options & F_FLOOD)) { 1312 (void)printf("\t(same route)"); 1313 hlen -= i; 1314 cp += i; 1315 break; 1316 } 1317 old_rrlen = i; 1318 bcopy((char *)cp, old_rr, i); 1319 (void)printf("\nRR: "); 1320 if (i >= INADDR_LEN && 1321 i <= hlen - (int)sizeof(struct ip)) { 1322 for (;;) { 1323 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1324 if (ina.s_addr == 0) 1325 (void)printf("\t0.0.0.0"); 1326 else 1327 (void)printf("\t%s", 1328 pr_addr(ina)); 1329 hlen -= INADDR_LEN; 1330 cp += INADDR_LEN - 1; 1331 i -= INADDR_LEN; 1332 if (i < INADDR_LEN) 1333 break; 1334 (void)putchar('\n'); 1335 } 1336 } else 1337 (void)printf("\t(truncated route)"); 1338 break; 1339 case IPOPT_NOP: 1340 (void)printf("\nNOP"); 1341 break; 1342 default: 1343 (void)printf("\nunknown option %x", *cp); 1344 break; 1345 } 1346 if (!(options & F_FLOOD)) { 1347 (void)putchar('\n'); 1348 (void)fflush(stdout); 1349 } 1350 } 1351 1352 /* 1353 * status -- 1354 * Print out statistics when SIGINFO is received. 1355 */ 1356 1357 static void 1358 status(int sig __unused) 1359 { 1360 1361 siginfo_p = 1; 1362 } 1363 1364 static void 1365 check_status(void) 1366 { 1367 1368 if (siginfo_p) { 1369 siginfo_p = 0; 1370 (void)fprintf(stderr, "\r%ld/%ld packets received (%.1f%%)", 1371 nreceived, ntransmitted, 1372 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0); 1373 if (nreceived && timing) 1374 (void)fprintf(stderr, " %.3f min / %.3f avg / %.3f max", 1375 tmin, tsum / (nreceived + nrepeats), tmax); 1376 (void)fprintf(stderr, "\n"); 1377 } 1378 } 1379 1380 /* 1381 * finish -- 1382 * Print out statistics, and give up. 1383 */ 1384 static void 1385 finish(void) 1386 { 1387 1388 (void)signal(SIGINT, SIG_IGN); 1389 (void)signal(SIGALRM, SIG_IGN); 1390 (void)putchar('\n'); 1391 (void)fflush(stdout); 1392 (void)printf("--- %s ping statistics ---\n", hostname); 1393 (void)printf("%ld packets transmitted, ", ntransmitted); 1394 (void)printf("%ld packets received, ", nreceived); 1395 if (nrepeats) 1396 (void)printf("+%ld duplicates, ", nrepeats); 1397 if (ntransmitted) { 1398 if (nreceived > ntransmitted) 1399 (void)printf("-- somebody's printing up packets!"); 1400 else 1401 (void)printf("%.1f%% packet loss", 1402 ((ntransmitted - nreceived) * 100.0) / 1403 ntransmitted); 1404 } 1405 if (nrcvtimeout) 1406 (void)printf(", %ld packets out of wait time", nrcvtimeout); 1407 (void)putchar('\n'); 1408 if (nreceived && timing) { 1409 double n = nreceived + nrepeats; 1410 double avg = tsum / n; 1411 double vari = tsumsq / n - avg * avg; 1412 (void)printf( 1413 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", 1414 tmin, avg, tmax, sqrt(vari)); 1415 } 1416 1417 if (nreceived) 1418 exit(0); 1419 else 1420 exit(2); 1421 } 1422 1423 #ifdef notdef 1424 static char *ttab[] = { 1425 "Echo Reply", /* ip + seq + udata */ 1426 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */ 1427 "Source Quench", /* IP */ 1428 "Redirect", /* redirect type, gateway, + IP */ 1429 "Echo", 1430 "Time Exceeded", /* transit, frag reassem + IP */ 1431 "Parameter Problem", /* pointer + IP */ 1432 "Timestamp", /* id + seq + three timestamps */ 1433 "Timestamp Reply", /* " */ 1434 "Info Request", /* id + sq */ 1435 "Info Reply" /* " */ 1436 }; 1437 #endif 1438 1439 /* 1440 * pr_icmph -- 1441 * Print a descriptive string about an ICMP header. 1442 */ 1443 static void 1444 pr_icmph(struct icmp *icp) 1445 { 1446 1447 switch(icp->icmp_type) { 1448 case ICMP_ECHOREPLY: 1449 (void)printf("Echo Reply\n"); 1450 /* XXX ID + Seq + Data */ 1451 break; 1452 case ICMP_UNREACH: 1453 switch(icp->icmp_code) { 1454 case ICMP_UNREACH_NET: 1455 (void)printf("Destination Net Unreachable\n"); 1456 break; 1457 case ICMP_UNREACH_HOST: 1458 (void)printf("Destination Host Unreachable\n"); 1459 break; 1460 case ICMP_UNREACH_PROTOCOL: 1461 (void)printf("Destination Protocol Unreachable\n"); 1462 break; 1463 case ICMP_UNREACH_PORT: 1464 (void)printf("Destination Port Unreachable\n"); 1465 break; 1466 case ICMP_UNREACH_NEEDFRAG: 1467 (void)printf("frag needed and DF set (MTU %d)\n", 1468 ntohs(icp->icmp_nextmtu)); 1469 break; 1470 case ICMP_UNREACH_SRCFAIL: 1471 (void)printf("Source Route Failed\n"); 1472 break; 1473 case ICMP_UNREACH_FILTER_PROHIB: 1474 (void)printf("Communication prohibited by filter\n"); 1475 break; 1476 default: 1477 (void)printf("Dest Unreachable, Bad Code: %d\n", 1478 icp->icmp_code); 1479 break; 1480 } 1481 /* Print returned IP header information */ 1482 #ifndef icmp_data 1483 pr_retip(&icp->icmp_ip); 1484 #else 1485 pr_retip((struct ip *)icp->icmp_data); 1486 #endif 1487 break; 1488 case ICMP_SOURCEQUENCH: 1489 (void)printf("Source Quench\n"); 1490 #ifndef icmp_data 1491 pr_retip(&icp->icmp_ip); 1492 #else 1493 pr_retip((struct ip *)icp->icmp_data); 1494 #endif 1495 break; 1496 case ICMP_REDIRECT: 1497 switch(icp->icmp_code) { 1498 case ICMP_REDIRECT_NET: 1499 (void)printf("Redirect Network"); 1500 break; 1501 case ICMP_REDIRECT_HOST: 1502 (void)printf("Redirect Host"); 1503 break; 1504 case ICMP_REDIRECT_TOSNET: 1505 (void)printf("Redirect Type of Service and Network"); 1506 break; 1507 case ICMP_REDIRECT_TOSHOST: 1508 (void)printf("Redirect Type of Service and Host"); 1509 break; 1510 default: 1511 (void)printf("Redirect, Bad Code: %d", icp->icmp_code); 1512 break; 1513 } 1514 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr)); 1515 #ifndef icmp_data 1516 pr_retip(&icp->icmp_ip); 1517 #else 1518 pr_retip((struct ip *)icp->icmp_data); 1519 #endif 1520 break; 1521 case ICMP_ECHO: 1522 (void)printf("Echo Request\n"); 1523 /* XXX ID + Seq + Data */ 1524 break; 1525 case ICMP_TIMXCEED: 1526 switch(icp->icmp_code) { 1527 case ICMP_TIMXCEED_INTRANS: 1528 (void)printf("Time to live exceeded\n"); 1529 break; 1530 case ICMP_TIMXCEED_REASS: 1531 (void)printf("Frag reassembly time exceeded\n"); 1532 break; 1533 default: 1534 (void)printf("Time exceeded, Bad Code: %d\n", 1535 icp->icmp_code); 1536 break; 1537 } 1538 #ifndef icmp_data 1539 pr_retip(&icp->icmp_ip); 1540 #else 1541 pr_retip((struct ip *)icp->icmp_data); 1542 #endif 1543 break; 1544 case ICMP_PARAMPROB: 1545 (void)printf("Parameter problem: pointer = 0x%02x\n", 1546 icp->icmp_hun.ih_pptr); 1547 #ifndef icmp_data 1548 pr_retip(&icp->icmp_ip); 1549 #else 1550 pr_retip((struct ip *)icp->icmp_data); 1551 #endif 1552 break; 1553 case ICMP_TSTAMP: 1554 (void)printf("Timestamp\n"); 1555 /* XXX ID + Seq + 3 timestamps */ 1556 break; 1557 case ICMP_TSTAMPREPLY: 1558 (void)printf("Timestamp Reply\n"); 1559 /* XXX ID + Seq + 3 timestamps */ 1560 break; 1561 case ICMP_IREQ: 1562 (void)printf("Information Request\n"); 1563 /* XXX ID + Seq */ 1564 break; 1565 case ICMP_IREQREPLY: 1566 (void)printf("Information Reply\n"); 1567 /* XXX ID + Seq */ 1568 break; 1569 case ICMP_MASKREQ: 1570 (void)printf("Address Mask Request\n"); 1571 break; 1572 case ICMP_MASKREPLY: 1573 (void)printf("Address Mask Reply\n"); 1574 break; 1575 case ICMP_ROUTERADVERT: 1576 (void)printf("Router Advertisement\n"); 1577 break; 1578 case ICMP_ROUTERSOLICIT: 1579 (void)printf("Router Solicitation\n"); 1580 break; 1581 default: 1582 (void)printf("Bad ICMP type: %d\n", icp->icmp_type); 1583 } 1584 } 1585 1586 /* 1587 * pr_iph -- 1588 * Print an IP header with options. 1589 */ 1590 static void 1591 pr_iph(struct ip *ip) 1592 { 1593 struct in_addr ina; 1594 u_char *cp; 1595 int hlen; 1596 1597 hlen = ip->ip_hl << 2; 1598 cp = (u_char *)ip + 20; /* point to options */ 1599 1600 (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1601 (void)printf(" %1x %1x %02x %04x %04x", 1602 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len), 1603 ntohs(ip->ip_id)); 1604 (void)printf(" %1lx %04lx", 1605 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13, 1606 (u_long) ntohl(ip->ip_off) & 0x1fff); 1607 (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, 1608 ntohs(ip->ip_sum)); 1609 memcpy(&ina, &ip->ip_src.s_addr, sizeof ina); 1610 (void)printf(" %s ", inet_ntoa(ina)); 1611 memcpy(&ina, &ip->ip_dst.s_addr, sizeof ina); 1612 (void)printf(" %s ", inet_ntoa(ina)); 1613 /* dump any option bytes */ 1614 while (hlen-- > 20) { 1615 (void)printf("%02x", *cp++); 1616 } 1617 (void)putchar('\n'); 1618 } 1619 1620 /* 1621 * pr_addr -- 1622 * Return an ascii host address as a dotted quad and optionally with 1623 * a hostname. 1624 */ 1625 static char * 1626 pr_addr(struct in_addr ina) 1627 { 1628 struct hostent *hp; 1629 static char buf[16 + 3 + MAXHOSTNAMELEN]; 1630 1631 if (options & F_NUMERIC) 1632 return inet_ntoa(ina); 1633 1634 hp = cap_gethostbyaddr(capdns, (char *)&ina, 4, AF_INET); 1635 1636 if (hp == NULL) 1637 return inet_ntoa(ina); 1638 1639 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1640 inet_ntoa(ina)); 1641 return(buf); 1642 } 1643 1644 /* 1645 * pr_retip -- 1646 * Dump some info on a returned (via ICMP) IP packet. 1647 */ 1648 static void 1649 pr_retip(struct ip *ip) 1650 { 1651 u_char *cp; 1652 int hlen; 1653 1654 pr_iph(ip); 1655 hlen = ip->ip_hl << 2; 1656 cp = (u_char *)ip + hlen; 1657 1658 if (ip->ip_p == 6) 1659 (void)printf("TCP: from port %u, to port %u (decimal)\n", 1660 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1661 else if (ip->ip_p == 17) 1662 (void)printf("UDP: from port %u, to port %u (decimal)\n", 1663 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1664 } 1665 1666 static char * 1667 pr_ntime(n_time timestamp) 1668 { 1669 static char buf[11]; 1670 int hour, min, sec; 1671 1672 sec = ntohl(timestamp) / 1000; 1673 hour = sec / 60 / 60; 1674 min = (sec % (60 * 60)) / 60; 1675 sec = (sec % (60 * 60)) % 60; 1676 1677 (void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec); 1678 1679 return (buf); 1680 } 1681 1682 static void 1683 fill(char *bp, char *patp) 1684 { 1685 char *cp; 1686 int pat[16]; 1687 u_int ii, jj, kk; 1688 1689 for (cp = patp; *cp; cp++) { 1690 if (!isxdigit(*cp)) 1691 errx(EX_USAGE, 1692 "patterns must be specified as hex digits"); 1693 1694 } 1695 ii = sscanf(patp, 1696 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1697 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 1698 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 1699 &pat[13], &pat[14], &pat[15]); 1700 1701 if (ii > 0) 1702 for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii) 1703 for (jj = 0; jj < ii; ++jj) 1704 bp[jj + kk] = pat[jj]; 1705 if (!(options & F_QUIET)) { 1706 (void)printf("PATTERN: 0x"); 1707 for (jj = 0; jj < ii; ++jj) 1708 (void)printf("%02x", bp[jj] & 0xFF); 1709 (void)printf("\n"); 1710 } 1711 } 1712 1713 static cap_channel_t * 1714 capdns_setup(void) 1715 { 1716 cap_channel_t *capcas, *capdnsloc; 1717 #ifdef WITH_CASPER 1718 const char *types[2]; 1719 int families[1]; 1720 #endif 1721 capcas = cap_init(); 1722 if (capcas == NULL) 1723 err(1, "unable to create casper process"); 1724 capdnsloc = cap_service_open(capcas, "system.dns"); 1725 /* Casper capability no longer needed. */ 1726 cap_close(capcas); 1727 if (capdnsloc == NULL) 1728 err(1, "unable to open system.dns service"); 1729 #ifdef WITH_CASPER 1730 types[0] = "NAME2ADDR"; 1731 types[1] = "ADDR2NAME"; 1732 if (cap_dns_type_limit(capdnsloc, types, 2) < 0) 1733 err(1, "unable to limit access to system.dns service"); 1734 families[0] = AF_INET; 1735 if (cap_dns_family_limit(capdnsloc, families, 1) < 0) 1736 err(1, "unable to limit access to system.dns service"); 1737 #endif 1738 return (capdnsloc); 1739 } 1740 1741 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 1742 #define SECOPT " [-P policy]" 1743 #else 1744 #define SECOPT "" 1745 #endif 1746 static void 1747 usage(void) 1748 { 1749 1750 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 1751 "usage: ping [-AaDdfHnoQqRrv] [-c count] [-G sweepmaxsize] [-g sweepminsize]", 1752 " [-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]", 1753 " " SECOPT " [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]", 1754 " [-W waittime] [-z tos] host", 1755 " ping [-AaDdfHLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]", 1756 " [-M mask | time] [-m ttl]" SECOPT " [-p pattern] [-S src_addr]", 1757 " [-s packetsize] [-T ttl] [-t timeout] [-W waittime]", 1758 " [-z tos] mcast-group"); 1759 exit(EX_USAGE); 1760 } 1761