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 <ctype.h> 89 #include <err.h> 90 #include <errno.h> 91 #include <math.h> 92 #include <netdb.h> 93 #include <signal.h> 94 #include <stdio.h> 95 #include <stdlib.h> 96 #include <string.h> 97 #include <sysexits.h> 98 #include <unistd.h> 99 100 #define INADDR_LEN ((int)sizeof(in_addr_t)) 101 #define TIMEVAL_LEN ((int)sizeof(struct tv32)) 102 #define MASK_LEN (ICMP_MASKLEN - ICMP_MINLEN) 103 #define TS_LEN (ICMP_TSLEN - ICMP_MINLEN) 104 #define DEFDATALEN 56 /* default data length */ 105 #define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */ 106 /* runs out of buffer space */ 107 #define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN) 108 #define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN) 109 #define MAXWAIT 10000 /* max ms to wait for response */ 110 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */ 111 #define MAXTOS 255 112 113 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 114 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 115 #define SET(bit) (A(bit) |= B(bit)) 116 #define CLR(bit) (A(bit) &= (~B(bit))) 117 #define TST(bit) (A(bit) & B(bit)) 118 119 struct tv32 { 120 int32_t tv32_sec; 121 int32_t tv32_usec; 122 }; 123 124 /* various options */ 125 static int options; 126 #define F_FLOOD 0x0001 127 #define F_INTERVAL 0x0002 128 #define F_NUMERIC 0x0004 129 #define F_PINGFILLED 0x0008 130 #define F_QUIET 0x0010 131 #define F_RROUTE 0x0020 132 #define F_SO_DEBUG 0x0040 133 #define F_SO_DONTROUTE 0x0080 134 #define F_VERBOSE 0x0100 135 #define F_QUIET2 0x0200 136 #define F_NOLOOP 0x0400 137 #define F_MTTL 0x0800 138 #define F_MIF 0x1000 139 #define F_AUDIBLE 0x2000 140 #ifdef IPSEC 141 #ifdef IPSEC_POLICY_IPSEC 142 #define F_POLICY 0x4000 143 #endif /*IPSEC_POLICY_IPSEC*/ 144 #endif /*IPSEC*/ 145 #define F_TTL 0x8000 146 #define F_MISSED 0x10000 147 #define F_ONCE 0x20000 148 #define F_HDRINCL 0x40000 149 #define F_MASK 0x80000 150 #define F_TIME 0x100000 151 #define F_SWEEP 0x200000 152 #define F_WAITTIME 0x400000 153 154 /* 155 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 156 * number of received sequence numbers we can keep track of. Change 128 157 * to 8192 for complete accuracy... 158 */ 159 #define MAX_DUP_CHK (8 * 128) 160 static int mx_dup_ck = MAX_DUP_CHK; 161 static char rcvd_tbl[MAX_DUP_CHK / 8]; 162 163 static struct sockaddr_in whereto; /* who to ping */ 164 static int datalen = DEFDATALEN; 165 static int maxpayload; 166 static int ssend; /* send socket file descriptor */ 167 static int srecv; /* receive socket file descriptor */ 168 static u_char outpackhdr[IP_MAXPACKET], *outpack; 169 static char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */ 170 static char BSPACE = '\b'; /* characters written for flood */ 171 static char DOT = '.'; 172 static char *hostname; 173 static char *shostname; 174 static int ident; /* process id to identify our packets */ 175 static int uid; /* cached uid for micro-optimization */ 176 static u_char icmp_type = ICMP_ECHO; 177 static u_char icmp_type_rsp = ICMP_ECHOREPLY; 178 static int phdr_len = 0; 179 static int send_len; 180 181 /* counters */ 182 static long nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 183 static long npackets; /* max packets to transmit */ 184 static long nreceived; /* # of packets we got back */ 185 static long nrepeats; /* number of duplicates */ 186 static long ntransmitted; /* sequence # for outbound packets = #sent */ 187 static long snpackets; /* max packets to transmit in one sweep */ 188 static long sntransmitted; /* # of packets we sent in this sweep */ 189 static int sweepmax; /* max value of payload in sweep */ 190 static int sweepmin = 0; /* start value of payload in sweep */ 191 static int sweepincr = 1; /* payload increment in sweep */ 192 static int interval = 1000; /* interval between packets, ms */ 193 static int waittime = MAXWAIT; /* timeout for each packet */ 194 static long nrcvtimeout = 0; /* # of packets we got back after waittime */ 195 196 /* timing */ 197 static int timing; /* flag to do timing */ 198 static double tmin = 999999999.0; /* minimum round trip time */ 199 static double tmax = 0.0; /* maximum round trip time */ 200 static double tsum = 0.0; /* sum of all times, for doing average */ 201 static double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 202 203 /* nonzero if we've been told to finish up */ 204 static volatile sig_atomic_t finish_up; 205 static volatile sig_atomic_t siginfo_p; 206 207 static cap_channel_t *capdns; 208 209 static void fill(char *, char *); 210 static u_short in_cksum(u_short *, int); 211 static cap_channel_t *capdns_setup(void); 212 static void check_status(void); 213 static void finish(void) __dead2; 214 static void pinger(void); 215 static char *pr_addr(struct in_addr); 216 static char *pr_ntime(n_time); 217 static void pr_icmph(struct icmp *); 218 static void pr_iph(struct ip *); 219 static void pr_pack(char *, int, struct sockaddr_in *, struct timeval *); 220 static void pr_retip(struct ip *); 221 static void status(int); 222 static void stopit(int); 223 static void tvsub(struct timeval *, const struct timeval *); 224 static void usage(void) __dead2; 225 226 int 227 main(int argc, char *const *argv) 228 { 229 struct sockaddr_in from, sock_in; 230 struct in_addr ifaddr; 231 struct timeval last, intvl; 232 struct iovec iov; 233 struct ip *ip; 234 struct msghdr msg; 235 struct sigaction si_sa; 236 size_t sz; 237 u_char *datap, packet[IP_MAXPACKET] __aligned(4); 238 char *ep, *source, *target, *payload; 239 struct hostent *hp; 240 #ifdef IPSEC_POLICY_IPSEC 241 char *policy_in, *policy_out; 242 #endif 243 struct sockaddr_in *to; 244 double t; 245 u_long alarmtimeout; 246 long ltmp; 247 int almost_done, ch, df, hold, i, icmp_len, mib[4], preload; 248 int ssend_errno, srecv_errno, tos, ttl; 249 char ctrl[CMSG_SPACE(sizeof(struct timeval))]; 250 char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN]; 251 #ifdef IP_OPTIONS 252 char rspace[MAX_IPOPTLEN]; /* record route space */ 253 #endif 254 unsigned char loop, mttl; 255 256 payload = source = NULL; 257 #ifdef IPSEC_POLICY_IPSEC 258 policy_in = policy_out = NULL; 259 #endif 260 cap_rights_t rights; 261 bool cansandbox; 262 263 /* 264 * Do the stuff that we need root priv's for *first*, and 265 * then drop our setuid bit. Save error reporting for 266 * after arg parsing. 267 * 268 * Historicaly ping was using one socket 's' for sending and for 269 * receiving. After capsicum(4) related changes we use two 270 * sockets. It was done for special ping use case - when user 271 * issue ping on multicast or broadcast address replies come 272 * from different addresses, not from the address we 273 * connect(2)'ed to, and send socket do not receive those 274 * packets. 275 */ 276 ssend = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 277 ssend_errno = errno; 278 srecv = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 279 srecv_errno = errno; 280 281 if (setuid(getuid()) != 0) 282 err(EX_NOPERM, "setuid() failed"); 283 uid = getuid(); 284 285 if (ssend < 0) { 286 errno = ssend_errno; 287 err(EX_OSERR, "ssend socket"); 288 } 289 290 if (srecv < 0) { 291 errno = srecv_errno; 292 err(EX_OSERR, "srecv socket"); 293 } 294 295 alarmtimeout = df = preload = tos = 0; 296 297 outpack = outpackhdr + sizeof(struct ip); 298 while ((ch = getopt(argc, argv, 299 "Aac:DdfG:g:h:I:i:Ll:M:m:nop:QqRrS:s:T:t:vW:z:" 300 #ifdef IPSEC 301 #ifdef IPSEC_POLICY_IPSEC 302 "P:" 303 #endif /*IPSEC_POLICY_IPSEC*/ 304 #endif /*IPSEC*/ 305 )) != -1) 306 { 307 switch(ch) { 308 case 'A': 309 options |= F_MISSED; 310 break; 311 case 'a': 312 options |= F_AUDIBLE; 313 break; 314 case 'c': 315 ltmp = strtol(optarg, &ep, 0); 316 if (*ep || ep == optarg || ltmp > LONG_MAX || ltmp <=0) 317 errx(EX_USAGE, 318 "invalid count of packets to transmit: `%s'", 319 optarg); 320 npackets = ltmp; 321 break; 322 case 'D': 323 options |= F_HDRINCL; 324 df = 1; 325 break; 326 case 'd': 327 options |= F_SO_DEBUG; 328 break; 329 case 'f': 330 if (uid) { 331 errno = EPERM; 332 err(EX_NOPERM, "-f flag"); 333 } 334 options |= F_FLOOD; 335 setbuf(stdout, (char *)NULL); 336 break; 337 case 'G': /* Maximum packet size for ping sweep */ 338 ltmp = strtol(optarg, &ep, 0); 339 if (*ep || ep == optarg || ltmp <= 0) 340 errx(EX_USAGE, "invalid packet size: `%s'", 341 optarg); 342 if (uid != 0 && ltmp > DEFDATALEN) { 343 errno = EPERM; 344 err(EX_NOPERM, 345 "packet size too large: %ld > %u", 346 ltmp, DEFDATALEN); 347 } 348 options |= F_SWEEP; 349 sweepmax = ltmp; 350 break; 351 case 'g': /* Minimum packet size for ping sweep */ 352 ltmp = strtol(optarg, &ep, 0); 353 if (*ep || ep == optarg || ltmp <= 0) 354 errx(EX_USAGE, "invalid packet size: `%s'", 355 optarg); 356 if (uid != 0 && ltmp > DEFDATALEN) { 357 errno = EPERM; 358 err(EX_NOPERM, 359 "packet size too large: %ld > %u", 360 ltmp, DEFDATALEN); 361 } 362 options |= F_SWEEP; 363 sweepmin = ltmp; 364 break; 365 case 'h': /* Packet size increment for ping sweep */ 366 ltmp = strtol(optarg, &ep, 0); 367 if (*ep || ep == optarg || ltmp < 1) 368 errx(EX_USAGE, "invalid increment size: `%s'", 369 optarg); 370 if (uid != 0 && ltmp > DEFDATALEN) { 371 errno = EPERM; 372 err(EX_NOPERM, 373 "packet size too large: %ld > %u", 374 ltmp, DEFDATALEN); 375 } 376 options |= F_SWEEP; 377 sweepincr = ltmp; 378 break; 379 case 'I': /* multicast interface */ 380 if (inet_aton(optarg, &ifaddr) == 0) 381 errx(EX_USAGE, 382 "invalid multicast interface: `%s'", 383 optarg); 384 options |= F_MIF; 385 break; 386 case 'i': /* wait between sending packets */ 387 t = strtod(optarg, &ep) * 1000.0; 388 if (*ep || ep == optarg || t > (double)INT_MAX) 389 errx(EX_USAGE, "invalid timing interval: `%s'", 390 optarg); 391 options |= F_INTERVAL; 392 interval = (int)t; 393 if (uid && interval < 1000) { 394 errno = EPERM; 395 err(EX_NOPERM, "-i interval too short"); 396 } 397 break; 398 case 'L': 399 options |= F_NOLOOP; 400 loop = 0; 401 break; 402 case 'l': 403 ltmp = strtol(optarg, &ep, 0); 404 if (*ep || ep == optarg || ltmp > INT_MAX || ltmp < 0) 405 errx(EX_USAGE, 406 "invalid preload value: `%s'", optarg); 407 if (uid) { 408 errno = EPERM; 409 err(EX_NOPERM, "-l flag"); 410 } 411 preload = ltmp; 412 break; 413 case 'M': 414 switch(optarg[0]) { 415 case 'M': 416 case 'm': 417 options |= F_MASK; 418 break; 419 case 'T': 420 case 't': 421 options |= F_TIME; 422 break; 423 default: 424 errx(EX_USAGE, "invalid message: `%c'", optarg[0]); 425 break; 426 } 427 break; 428 case 'm': /* TTL */ 429 ltmp = strtol(optarg, &ep, 0); 430 if (*ep || ep == optarg || ltmp > MAXTTL || ltmp < 0) 431 errx(EX_USAGE, "invalid TTL: `%s'", optarg); 432 ttl = ltmp; 433 options |= F_TTL; 434 break; 435 case 'n': 436 options |= F_NUMERIC; 437 break; 438 case 'o': 439 options |= F_ONCE; 440 break; 441 #ifdef IPSEC 442 #ifdef IPSEC_POLICY_IPSEC 443 case 'P': 444 options |= F_POLICY; 445 if (!strncmp("in", optarg, 2)) 446 policy_in = strdup(optarg); 447 else if (!strncmp("out", optarg, 3)) 448 policy_out = strdup(optarg); 449 else 450 errx(1, "invalid security policy"); 451 break; 452 #endif /*IPSEC_POLICY_IPSEC*/ 453 #endif /*IPSEC*/ 454 case 'p': /* fill buffer with user pattern */ 455 options |= F_PINGFILLED; 456 payload = optarg; 457 break; 458 case 'Q': 459 options |= F_QUIET2; 460 break; 461 case 'q': 462 options |= F_QUIET; 463 break; 464 case 'R': 465 options |= F_RROUTE; 466 break; 467 case 'r': 468 options |= F_SO_DONTROUTE; 469 break; 470 case 'S': 471 source = optarg; 472 break; 473 case 's': /* size of packet to send */ 474 ltmp = strtol(optarg, &ep, 0); 475 if (*ep || ep == optarg || ltmp < 0) 476 errx(EX_USAGE, "invalid packet size: `%s'", 477 optarg); 478 if (uid != 0 && ltmp > DEFDATALEN) { 479 errno = EPERM; 480 err(EX_NOPERM, 481 "packet size too large: %ld > %u", 482 ltmp, DEFDATALEN); 483 } 484 datalen = ltmp; 485 break; 486 case 'T': /* multicast TTL */ 487 ltmp = strtol(optarg, &ep, 0); 488 if (*ep || ep == optarg || ltmp > MAXTTL || ltmp < 0) 489 errx(EX_USAGE, "invalid multicast TTL: `%s'", 490 optarg); 491 mttl = ltmp; 492 options |= F_MTTL; 493 break; 494 case 't': 495 alarmtimeout = strtoul(optarg, &ep, 0); 496 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 497 errx(EX_USAGE, "invalid timeout: `%s'", 498 optarg); 499 if (alarmtimeout > MAXALARM) 500 errx(EX_USAGE, "invalid timeout: `%s' > %d", 501 optarg, MAXALARM); 502 alarm((int)alarmtimeout); 503 break; 504 case 'v': 505 options |= F_VERBOSE; 506 break; 507 case 'W': /* wait ms for answer */ 508 t = strtod(optarg, &ep); 509 if (*ep || ep == optarg || t > (double)INT_MAX) 510 errx(EX_USAGE, "invalid timing interval: `%s'", 511 optarg); 512 options |= F_WAITTIME; 513 waittime = (int)t; 514 break; 515 case 'z': 516 options |= F_HDRINCL; 517 ltmp = strtol(optarg, &ep, 0); 518 if (*ep || ep == optarg || ltmp > MAXTOS || ltmp < 0) 519 errx(EX_USAGE, "invalid TOS: `%s'", optarg); 520 tos = ltmp; 521 break; 522 default: 523 usage(); 524 } 525 } 526 527 if (argc - optind != 1) 528 usage(); 529 target = argv[optind]; 530 531 switch (options & (F_MASK|F_TIME)) { 532 case 0: break; 533 case F_MASK: 534 icmp_type = ICMP_MASKREQ; 535 icmp_type_rsp = ICMP_MASKREPLY; 536 phdr_len = MASK_LEN; 537 if (!(options & F_QUIET)) 538 (void)printf("ICMP_MASKREQ\n"); 539 break; 540 case F_TIME: 541 icmp_type = ICMP_TSTAMP; 542 icmp_type_rsp = ICMP_TSTAMPREPLY; 543 phdr_len = TS_LEN; 544 if (!(options & F_QUIET)) 545 (void)printf("ICMP_TSTAMP\n"); 546 break; 547 default: 548 errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive."); 549 break; 550 } 551 icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len; 552 if (options & F_RROUTE) 553 icmp_len += MAX_IPOPTLEN; 554 maxpayload = IP_MAXPACKET - icmp_len; 555 if (datalen > maxpayload) 556 errx(EX_USAGE, "packet size too large: %d > %d", datalen, 557 maxpayload); 558 send_len = icmp_len + datalen; 559 datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN]; 560 if (options & F_PINGFILLED) { 561 fill((char *)datap, payload); 562 } 563 capdns = capdns_setup(); 564 if (source) { 565 bzero((char *)&sock_in, sizeof(sock_in)); 566 sock_in.sin_family = AF_INET; 567 if (inet_aton(source, &sock_in.sin_addr) != 0) { 568 shostname = source; 569 } else { 570 hp = cap_gethostbyname2(capdns, source, AF_INET); 571 if (!hp) 572 errx(EX_NOHOST, "cannot resolve %s: %s", 573 source, hstrerror(h_errno)); 574 575 sock_in.sin_len = sizeof sock_in; 576 if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) || 577 hp->h_length < 0) 578 errx(1, "gethostbyname2: illegal address"); 579 memcpy(&sock_in.sin_addr, hp->h_addr_list[0], 580 sizeof(sock_in.sin_addr)); 581 (void)strncpy(snamebuf, hp->h_name, 582 sizeof(snamebuf) - 1); 583 snamebuf[sizeof(snamebuf) - 1] = '\0'; 584 shostname = snamebuf; 585 } 586 if (bind(ssend, (struct sockaddr *)&sock_in, sizeof sock_in) == 587 -1) 588 err(1, "bind"); 589 } 590 591 bzero(&whereto, sizeof(whereto)); 592 to = &whereto; 593 to->sin_family = AF_INET; 594 to->sin_len = sizeof *to; 595 if (inet_aton(target, &to->sin_addr) != 0) { 596 hostname = target; 597 } else { 598 hp = cap_gethostbyname2(capdns, target, AF_INET); 599 if (!hp) 600 errx(EX_NOHOST, "cannot resolve %s: %s", 601 target, hstrerror(h_errno)); 602 603 if ((unsigned)hp->h_length > sizeof(to->sin_addr)) 604 errx(1, "gethostbyname2 returned an illegal address"); 605 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr); 606 (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1); 607 hnamebuf[sizeof(hnamebuf) - 1] = '\0'; 608 hostname = hnamebuf; 609 } 610 611 /* From now on we will use only reverse DNS lookups. */ 612 if (capdns != NULL) { 613 const char *types[1]; 614 615 types[0] = "ADDR2NAME"; 616 if (cap_dns_type_limit(capdns, types, 1) < 0) 617 err(1, "unable to limit access to system.dns service"); 618 } 619 620 if (connect(ssend, (struct sockaddr *)&whereto, sizeof(whereto)) != 0) 621 err(1, "connect"); 622 623 if (options & F_FLOOD && options & F_INTERVAL) 624 errx(EX_USAGE, "-f and -i: incompatible options"); 625 626 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 627 errx(EX_USAGE, 628 "-f flag cannot be used with multicast destination"); 629 if (options & (F_MIF | F_NOLOOP | F_MTTL) 630 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 631 errx(EX_USAGE, 632 "-I, -L, -T flags cannot be used with unicast destination"); 633 634 if (datalen >= TIMEVAL_LEN) /* can we time transfer */ 635 timing = 1; 636 637 if (!(options & F_PINGFILLED)) 638 for (i = TIMEVAL_LEN; i < datalen; ++i) 639 *datap++ = i; 640 641 ident = getpid() & 0xFFFF; 642 643 hold = 1; 644 if (options & F_SO_DEBUG) { 645 (void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold, 646 sizeof(hold)); 647 (void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold, 648 sizeof(hold)); 649 } 650 if (options & F_SO_DONTROUTE) 651 (void)setsockopt(ssend, SOL_SOCKET, SO_DONTROUTE, (char *)&hold, 652 sizeof(hold)); 653 #ifdef IPSEC 654 #ifdef IPSEC_POLICY_IPSEC 655 if (options & F_POLICY) { 656 char *buf; 657 if (policy_in != NULL) { 658 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 659 if (buf == NULL) 660 errx(EX_CONFIG, "%s", ipsec_strerror()); 661 if (setsockopt(srecv, IPPROTO_IP, IP_IPSEC_POLICY, 662 buf, ipsec_get_policylen(buf)) < 0) 663 err(EX_CONFIG, 664 "ipsec policy cannot be configured"); 665 free(buf); 666 } 667 668 if (policy_out != NULL) { 669 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 670 if (buf == NULL) 671 errx(EX_CONFIG, "%s", ipsec_strerror()); 672 if (setsockopt(ssend, IPPROTO_IP, IP_IPSEC_POLICY, 673 buf, ipsec_get_policylen(buf)) < 0) 674 err(EX_CONFIG, 675 "ipsec policy cannot be configured"); 676 free(buf); 677 } 678 } 679 #endif /*IPSEC_POLICY_IPSEC*/ 680 #endif /*IPSEC*/ 681 682 if (options & F_HDRINCL) { 683 ip = (struct ip*)outpackhdr; 684 if (!(options & (F_TTL | F_MTTL))) { 685 mib[0] = CTL_NET; 686 mib[1] = PF_INET; 687 mib[2] = IPPROTO_IP; 688 mib[3] = IPCTL_DEFTTL; 689 sz = sizeof(ttl); 690 if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1) 691 err(1, "sysctl(net.inet.ip.ttl)"); 692 } 693 setsockopt(ssend, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold)); 694 ip->ip_v = IPVERSION; 695 ip->ip_hl = sizeof(struct ip) >> 2; 696 ip->ip_tos = tos; 697 ip->ip_id = 0; 698 ip->ip_off = htons(df ? IP_DF : 0); 699 ip->ip_ttl = ttl; 700 ip->ip_p = IPPROTO_ICMP; 701 ip->ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY; 702 ip->ip_dst = to->sin_addr; 703 } 704 705 if (options & F_NUMERIC) 706 cansandbox = true; 707 else if (capdns != NULL) 708 cansandbox = CASPER_SUPPORT; 709 else 710 cansandbox = false; 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 if (cansandbox && cap_enter() < 0 && errno != ENOSYS) 718 err(1, "cap_enter"); 719 720 cap_rights_init(&rights, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT); 721 if (cap_rights_limit(srecv, &rights) < 0 && errno != ENOSYS) 722 err(1, "cap_rights_limit srecv"); 723 724 cap_rights_init(&rights, CAP_SEND, CAP_SETSOCKOPT); 725 if (cap_rights_limit(ssend, &rights) < 0 && errno != ENOSYS) 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 { int on = 1; 771 if (setsockopt(srecv, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)) < 0) 772 err(EX_OSERR, "setsockopt SO_TIMESTAMP"); 773 } 774 #endif 775 if (sweepmax) { 776 if (sweepmin > sweepmax) 777 errx(EX_USAGE, "Maximum packet size must be no less than the minimum packet size"); 778 779 if (datalen != DEFDATALEN) 780 errx(EX_USAGE, "Packet size and ping sweep are mutually exclusive"); 781 782 if (npackets > 0) { 783 snpackets = npackets; 784 npackets = 0; 785 } else 786 snpackets = 1; 787 datalen = sweepmin; 788 send_len = icmp_len + sweepmin; 789 } 790 if (options & F_SWEEP && !sweepmax) 791 errx(EX_USAGE, "Maximum sweep size must be specified"); 792 793 /* 794 * When pinging the broadcast address, you can get a lot of answers. 795 * Doing something so evil is useful if you are trying to stress the 796 * ethernet, or just want to fill the arp cache to get some stuff for 797 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast 798 * or multicast pings if they wish. 799 */ 800 801 /* 802 * XXX receive buffer needs undetermined space for mbuf overhead 803 * as well. 804 */ 805 hold = IP_MAXPACKET + 128; 806 (void)setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 807 sizeof(hold)); 808 /* CAP_SETSOCKOPT removed */ 809 cap_rights_init(&rights, CAP_RECV, CAP_EVENT); 810 if (cap_rights_limit(srecv, &rights) < 0 && errno != ENOSYS) 811 err(1, "cap_rights_limit srecv setsockopt"); 812 if (uid == 0) 813 (void)setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, (char *)&hold, 814 sizeof(hold)); 815 /* CAP_SETSOCKOPT removed */ 816 cap_rights_init(&rights, CAP_SEND); 817 if (cap_rights_limit(ssend, &rights) < 0 && errno != ENOSYS) 818 err(1, "cap_rights_limit ssend setsockopt"); 819 820 if (to->sin_family == AF_INET) { 821 (void)printf("PING %s (%s)", hostname, 822 inet_ntoa(to->sin_addr)); 823 if (source) 824 (void)printf(" from %s", shostname); 825 if (sweepmax) 826 (void)printf(": (%d ... %d) data bytes\n", 827 sweepmin, sweepmax); 828 else 829 (void)printf(": %d data bytes\n", datalen); 830 831 } else { 832 if (sweepmax) 833 (void)printf("PING %s: (%d ... %d) data bytes\n", 834 hostname, sweepmin, sweepmax); 835 else 836 (void)printf("PING %s: %d data bytes\n", hostname, datalen); 837 } 838 839 /* 840 * Use sigaction() instead of signal() to get unambiguous semantics, 841 * in particular with SA_RESTART not set. 842 */ 843 844 sigemptyset(&si_sa.sa_mask); 845 si_sa.sa_flags = 0; 846 847 si_sa.sa_handler = stopit; 848 if (sigaction(SIGINT, &si_sa, 0) == -1) { 849 err(EX_OSERR, "sigaction SIGINT"); 850 } 851 852 si_sa.sa_handler = status; 853 if (sigaction(SIGINFO, &si_sa, 0) == -1) { 854 err(EX_OSERR, "sigaction"); 855 } 856 857 if (alarmtimeout > 0) { 858 si_sa.sa_handler = stopit; 859 if (sigaction(SIGALRM, &si_sa, 0) == -1) 860 err(EX_OSERR, "sigaction SIGALRM"); 861 } 862 863 bzero(&msg, sizeof(msg)); 864 msg.msg_name = (caddr_t)&from; 865 msg.msg_iov = &iov; 866 msg.msg_iovlen = 1; 867 #ifdef SO_TIMESTAMP 868 msg.msg_control = (caddr_t)ctrl; 869 #endif 870 iov.iov_base = packet; 871 iov.iov_len = IP_MAXPACKET; 872 873 if (preload == 0) 874 pinger(); /* send the first ping */ 875 else { 876 if (npackets != 0 && preload > npackets) 877 preload = npackets; 878 while (preload--) /* fire off them quickies */ 879 pinger(); 880 } 881 (void)gettimeofday(&last, NULL); 882 883 if (options & F_FLOOD) { 884 intvl.tv_sec = 0; 885 intvl.tv_usec = 10000; 886 } else { 887 intvl.tv_sec = interval / 1000; 888 intvl.tv_usec = interval % 1000 * 1000; 889 } 890 891 almost_done = 0; 892 while (!finish_up) { 893 struct timeval now, timeout; 894 fd_set rfds; 895 int cc, n; 896 897 check_status(); 898 if ((unsigned)srecv >= FD_SETSIZE) 899 errx(EX_OSERR, "descriptor too large"); 900 FD_ZERO(&rfds); 901 FD_SET(srecv, &rfds); 902 (void)gettimeofday(&now, NULL); 903 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec; 904 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec; 905 while (timeout.tv_usec < 0) { 906 timeout.tv_usec += 1000000; 907 timeout.tv_sec--; 908 } 909 while (timeout.tv_usec >= 1000000) { 910 timeout.tv_usec -= 1000000; 911 timeout.tv_sec++; 912 } 913 if (timeout.tv_sec < 0) 914 timerclear(&timeout); 915 n = select(srecv + 1, &rfds, NULL, NULL, &timeout); 916 if (n < 0) 917 continue; /* Must be EINTR. */ 918 if (n == 1) { 919 struct timeval *tv = NULL; 920 #ifdef SO_TIMESTAMP 921 struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl; 922 923 msg.msg_controllen = sizeof(ctrl); 924 #endif 925 msg.msg_namelen = sizeof(from); 926 if ((cc = recvmsg(srecv, &msg, 0)) < 0) { 927 if (errno == EINTR) 928 continue; 929 warn("recvmsg"); 930 continue; 931 } 932 #ifdef SO_TIMESTAMP 933 if (cmsg->cmsg_level == SOL_SOCKET && 934 cmsg->cmsg_type == SCM_TIMESTAMP && 935 cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) { 936 /* Copy to avoid alignment problems: */ 937 memcpy(&now, CMSG_DATA(cmsg), sizeof(now)); 938 tv = &now; 939 } 940 #endif 941 if (tv == NULL) { 942 (void)gettimeofday(&now, NULL); 943 tv = &now; 944 } 945 pr_pack((char *)packet, cc, &from, tv); 946 if ((options & F_ONCE && nreceived) || 947 (npackets && nreceived >= npackets)) 948 break; 949 } 950 if (n == 0 || options & F_FLOOD) { 951 if (sweepmax && sntransmitted == snpackets) { 952 for (i = 0; i < sweepincr ; ++i) 953 *datap++ = i; 954 datalen += sweepincr; 955 if (datalen > sweepmax) 956 break; 957 send_len = icmp_len + datalen; 958 sntransmitted = 0; 959 } 960 if (!npackets || ntransmitted < npackets) 961 pinger(); 962 else { 963 if (almost_done) 964 break; 965 almost_done = 1; 966 intvl.tv_usec = 0; 967 if (nreceived) { 968 intvl.tv_sec = 2 * tmax / 1000; 969 if (!intvl.tv_sec) 970 intvl.tv_sec = 1; 971 } else { 972 intvl.tv_sec = waittime / 1000; 973 intvl.tv_usec = waittime % 1000 * 1000; 974 } 975 } 976 (void)gettimeofday(&last, NULL); 977 if (ntransmitted - nreceived - 1 > nmissedmax) { 978 nmissedmax = ntransmitted - nreceived - 1; 979 if (options & F_MISSED) 980 (void)write(STDOUT_FILENO, &BBELL, 1); 981 } 982 } 983 } 984 finish(); 985 /* NOTREACHED */ 986 exit(0); /* Make the compiler happy */ 987 } 988 989 /* 990 * stopit -- 991 * Set the global bit that causes the main loop to quit. 992 * Do NOT call finish() from here, since finish() does far too much 993 * to be called from a signal handler. 994 */ 995 void 996 stopit(int sig __unused) 997 { 998 999 /* 1000 * When doing reverse DNS lookups, the finish_up flag might not 1001 * be noticed for a while. Just exit if we get a second SIGINT. 1002 */ 1003 if (!(options & F_NUMERIC) && finish_up) 1004 _exit(nreceived ? 0 : 2); 1005 finish_up = 1; 1006 } 1007 1008 /* 1009 * pinger -- 1010 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1011 * will be added on by the kernel. The ID field is our UNIX process ID, 1012 * and the sequence number is an ascending integer. The first TIMEVAL_LEN 1013 * bytes of the data portion are used to hold a UNIX "timeval" struct in 1014 * host byte-order, to compute the round-trip time. 1015 */ 1016 static void 1017 pinger(void) 1018 { 1019 struct timeval now; 1020 struct tv32 tv32; 1021 struct ip *ip; 1022 struct icmp *icp; 1023 int cc, i; 1024 u_char *packet; 1025 1026 packet = outpack; 1027 icp = (struct icmp *)outpack; 1028 icp->icmp_type = icmp_type; 1029 icp->icmp_code = 0; 1030 icp->icmp_cksum = 0; 1031 icp->icmp_seq = htons(ntransmitted); 1032 icp->icmp_id = ident; /* ID */ 1033 1034 CLR(ntransmitted % mx_dup_ck); 1035 1036 if ((options & F_TIME) || timing) { 1037 (void)gettimeofday(&now, NULL); 1038 1039 tv32.tv32_sec = htonl(now.tv_sec); 1040 tv32.tv32_usec = htonl(now.tv_usec); 1041 if (options & F_TIME) 1042 icp->icmp_otime = htonl((now.tv_sec % (24*60*60)) 1043 * 1000 + now.tv_usec / 1000); 1044 if (timing) 1045 bcopy((void *)&tv32, 1046 (void *)&outpack[ICMP_MINLEN + phdr_len], 1047 sizeof(tv32)); 1048 } 1049 1050 cc = ICMP_MINLEN + phdr_len + datalen; 1051 1052 /* compute ICMP checksum here */ 1053 icp->icmp_cksum = in_cksum((u_short *)icp, cc); 1054 1055 if (options & F_HDRINCL) { 1056 cc += sizeof(struct ip); 1057 ip = (struct ip *)outpackhdr; 1058 ip->ip_len = htons(cc); 1059 ip->ip_sum = in_cksum((u_short *)outpackhdr, cc); 1060 packet = outpackhdr; 1061 } 1062 i = send(ssend, (char *)packet, cc, 0); 1063 if (i < 0 || i != cc) { 1064 if (i < 0) { 1065 if (options & F_FLOOD && errno == ENOBUFS) { 1066 usleep(FLOOD_BACKOFF); 1067 return; 1068 } 1069 warn("sendto"); 1070 } else { 1071 warn("%s: partial write: %d of %d bytes", 1072 hostname, i, cc); 1073 } 1074 } 1075 ntransmitted++; 1076 sntransmitted++; 1077 if (!(options & F_QUIET) && options & F_FLOOD) 1078 (void)write(STDOUT_FILENO, &DOT, 1); 1079 } 1080 1081 /* 1082 * pr_pack -- 1083 * Print out the packet, if it came from us. This logic is necessary 1084 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1085 * which arrive ('tis only fair). This permits multiple copies of this 1086 * program to be run without having intermingled output (or statistics!). 1087 */ 1088 static void 1089 pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timeval *tv) 1090 { 1091 struct in_addr ina; 1092 u_char *cp, *dp; 1093 struct icmp *icp; 1094 struct ip *ip; 1095 const void *tp; 1096 double triptime; 1097 int dupflag, hlen, i, j, recv_len, seq; 1098 static int old_rrlen; 1099 static char old_rr[MAX_IPOPTLEN]; 1100 1101 /* Check the IP header */ 1102 ip = (struct ip *)buf; 1103 hlen = ip->ip_hl << 2; 1104 recv_len = cc; 1105 if (cc < hlen + ICMP_MINLEN) { 1106 if (options & F_VERBOSE) 1107 warn("packet too short (%d bytes) from %s", cc, 1108 inet_ntoa(from->sin_addr)); 1109 return; 1110 } 1111 1112 /* Now the ICMP part */ 1113 cc -= hlen; 1114 icp = (struct icmp *)(buf + hlen); 1115 if (icp->icmp_type == icmp_type_rsp) { 1116 if (icp->icmp_id != ident) 1117 return; /* 'Twas not our ECHO */ 1118 ++nreceived; 1119 triptime = 0.0; 1120 if (timing) { 1121 struct timeval tv1; 1122 struct tv32 tv32; 1123 #ifndef icmp_data 1124 tp = &icp->icmp_ip; 1125 #else 1126 tp = icp->icmp_data; 1127 #endif 1128 tp = (const char *)tp + phdr_len; 1129 1130 if ((size_t)(cc - ICMP_MINLEN - phdr_len) >= 1131 sizeof(tv1)) { 1132 /* Copy to avoid alignment problems: */ 1133 memcpy(&tv32, tp, sizeof(tv32)); 1134 tv1.tv_sec = ntohl(tv32.tv32_sec); 1135 tv1.tv_usec = ntohl(tv32.tv32_usec); 1136 tvsub(tv, &tv1); 1137 triptime = ((double)tv->tv_sec) * 1000.0 + 1138 ((double)tv->tv_usec) / 1000.0; 1139 tsum += triptime; 1140 tsumsq += triptime * triptime; 1141 if (triptime < tmin) 1142 tmin = triptime; 1143 if (triptime > tmax) 1144 tmax = triptime; 1145 } else 1146 timing = 0; 1147 } 1148 1149 seq = ntohs(icp->icmp_seq); 1150 1151 if (TST(seq % mx_dup_ck)) { 1152 ++nrepeats; 1153 --nreceived; 1154 dupflag = 1; 1155 } else { 1156 SET(seq % mx_dup_ck); 1157 dupflag = 0; 1158 } 1159 1160 if (options & F_QUIET) 1161 return; 1162 1163 if (options & F_WAITTIME && triptime > waittime) { 1164 ++nrcvtimeout; 1165 return; 1166 } 1167 1168 if (options & F_FLOOD) 1169 (void)write(STDOUT_FILENO, &BSPACE, 1); 1170 else { 1171 (void)printf("%d bytes from %s: icmp_seq=%u", cc, 1172 inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr), 1173 seq); 1174 (void)printf(" ttl=%d", ip->ip_ttl); 1175 if (timing) 1176 (void)printf(" time=%.3f ms", triptime); 1177 if (dupflag) 1178 (void)printf(" (DUP!)"); 1179 if (options & F_AUDIBLE) 1180 (void)write(STDOUT_FILENO, &BBELL, 1); 1181 if (options & F_MASK) { 1182 /* Just prentend this cast isn't ugly */ 1183 (void)printf(" mask=%s", 1184 inet_ntoa(*(struct in_addr *)&(icp->icmp_mask))); 1185 } 1186 if (options & F_TIME) { 1187 (void)printf(" tso=%s", pr_ntime(icp->icmp_otime)); 1188 (void)printf(" tsr=%s", pr_ntime(icp->icmp_rtime)); 1189 (void)printf(" tst=%s", pr_ntime(icp->icmp_ttime)); 1190 } 1191 if (recv_len != send_len) { 1192 (void)printf( 1193 "\nwrong total length %d instead of %d", 1194 recv_len, send_len); 1195 } 1196 /* check the data */ 1197 cp = (u_char*)&icp->icmp_data[phdr_len]; 1198 dp = &outpack[ICMP_MINLEN + phdr_len]; 1199 cc -= ICMP_MINLEN + phdr_len; 1200 i = 0; 1201 if (timing) { /* don't check variable timestamp */ 1202 cp += TIMEVAL_LEN; 1203 dp += TIMEVAL_LEN; 1204 cc -= TIMEVAL_LEN; 1205 i += TIMEVAL_LEN; 1206 } 1207 for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) { 1208 if (*cp != *dp) { 1209 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", 1210 i, *dp, *cp); 1211 (void)printf("\ncp:"); 1212 cp = (u_char*)&icp->icmp_data[0]; 1213 for (i = 0; i < datalen; ++i, ++cp) { 1214 if ((i % 16) == 8) 1215 (void)printf("\n\t"); 1216 (void)printf("%2x ", *cp); 1217 } 1218 (void)printf("\ndp:"); 1219 cp = &outpack[ICMP_MINLEN]; 1220 for (i = 0; i < datalen; ++i, ++cp) { 1221 if ((i % 16) == 8) 1222 (void)printf("\n\t"); 1223 (void)printf("%2x ", *cp); 1224 } 1225 break; 1226 } 1227 } 1228 } 1229 } else { 1230 /* 1231 * We've got something other than an ECHOREPLY. 1232 * See if it's a reply to something that we sent. 1233 * We can compare IP destination, protocol, 1234 * and ICMP type and ID. 1235 * 1236 * Only print all the error messages if we are running 1237 * as root to avoid leaking information not normally 1238 * available to those not running as root. 1239 */ 1240 #ifndef icmp_data 1241 struct ip *oip = &icp->icmp_ip; 1242 #else 1243 struct ip *oip = (struct ip *)icp->icmp_data; 1244 #endif 1245 struct icmp *oicmp = (struct icmp *)(oip + 1); 1246 1247 if (((options & F_VERBOSE) && uid == 0) || 1248 (!(options & F_QUIET2) && 1249 (oip->ip_dst.s_addr == whereto.sin_addr.s_addr) && 1250 (oip->ip_p == IPPROTO_ICMP) && 1251 (oicmp->icmp_type == ICMP_ECHO) && 1252 (oicmp->icmp_id == ident))) { 1253 (void)printf("%d bytes from %s: ", cc, 1254 pr_addr(from->sin_addr)); 1255 pr_icmph(icp); 1256 } else 1257 return; 1258 } 1259 1260 /* Display any IP options */ 1261 cp = (u_char *)buf + sizeof(struct ip); 1262 1263 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp) 1264 switch (*cp) { 1265 case IPOPT_EOL: 1266 hlen = 0; 1267 break; 1268 case IPOPT_LSRR: 1269 case IPOPT_SSRR: 1270 (void)printf(*cp == IPOPT_LSRR ? 1271 "\nLSRR: " : "\nSSRR: "); 1272 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1; 1273 hlen -= 2; 1274 cp += 2; 1275 if (j >= INADDR_LEN && 1276 j <= hlen - (int)sizeof(struct ip)) { 1277 for (;;) { 1278 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1279 if (ina.s_addr == 0) 1280 (void)printf("\t0.0.0.0"); 1281 else 1282 (void)printf("\t%s", 1283 pr_addr(ina)); 1284 hlen -= INADDR_LEN; 1285 cp += INADDR_LEN - 1; 1286 j -= INADDR_LEN; 1287 if (j < INADDR_LEN) 1288 break; 1289 (void)putchar('\n'); 1290 } 1291 } else 1292 (void)printf("\t(truncated route)\n"); 1293 break; 1294 case IPOPT_RR: 1295 j = cp[IPOPT_OLEN]; /* get length */ 1296 i = cp[IPOPT_OFFSET]; /* and pointer */ 1297 hlen -= 2; 1298 cp += 2; 1299 if (i > j) 1300 i = j; 1301 i = i - IPOPT_MINOFF + 1; 1302 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) { 1303 old_rrlen = 0; 1304 continue; 1305 } 1306 if (i == old_rrlen 1307 && !bcmp((char *)cp, old_rr, i) 1308 && !(options & F_FLOOD)) { 1309 (void)printf("\t(same route)"); 1310 hlen -= i; 1311 cp += i; 1312 break; 1313 } 1314 old_rrlen = i; 1315 bcopy((char *)cp, old_rr, i); 1316 (void)printf("\nRR: "); 1317 if (i >= INADDR_LEN && 1318 i <= hlen - (int)sizeof(struct ip)) { 1319 for (;;) { 1320 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1321 if (ina.s_addr == 0) 1322 (void)printf("\t0.0.0.0"); 1323 else 1324 (void)printf("\t%s", 1325 pr_addr(ina)); 1326 hlen -= INADDR_LEN; 1327 cp += INADDR_LEN - 1; 1328 i -= INADDR_LEN; 1329 if (i < INADDR_LEN) 1330 break; 1331 (void)putchar('\n'); 1332 } 1333 } else 1334 (void)printf("\t(truncated route)"); 1335 break; 1336 case IPOPT_NOP: 1337 (void)printf("\nNOP"); 1338 break; 1339 default: 1340 (void)printf("\nunknown option %x", *cp); 1341 break; 1342 } 1343 if (!(options & F_FLOOD)) { 1344 (void)putchar('\n'); 1345 (void)fflush(stdout); 1346 } 1347 } 1348 1349 /* 1350 * in_cksum -- 1351 * Checksum routine for Internet Protocol family headers (C Version) 1352 */ 1353 u_short 1354 in_cksum(u_short *addr, int len) 1355 { 1356 int nleft, sum; 1357 u_short *w; 1358 union { 1359 u_short us; 1360 u_char uc[2]; 1361 } last; 1362 u_short answer; 1363 1364 nleft = len; 1365 sum = 0; 1366 w = addr; 1367 1368 /* 1369 * Our algorithm is simple, using a 32 bit accumulator (sum), we add 1370 * sequential 16 bit words to it, and at the end, fold back all the 1371 * carry bits from the top 16 bits into the lower 16 bits. 1372 */ 1373 while (nleft > 1) { 1374 sum += *w++; 1375 nleft -= 2; 1376 } 1377 1378 /* mop up an odd byte, if necessary */ 1379 if (nleft == 1) { 1380 last.uc[0] = *(u_char *)w; 1381 last.uc[1] = 0; 1382 sum += last.us; 1383 } 1384 1385 /* add back carry outs from top 16 bits to low 16 bits */ 1386 sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */ 1387 sum += (sum >> 16); /* add carry */ 1388 answer = ~sum; /* truncate to 16 bits */ 1389 return(answer); 1390 } 1391 1392 /* 1393 * tvsub -- 1394 * Subtract 2 timeval structs: out = out - in. Out is assumed to 1395 * be >= in. 1396 */ 1397 static void 1398 tvsub(struct timeval *out, const struct timeval *in) 1399 { 1400 1401 if ((out->tv_usec -= in->tv_usec) < 0) { 1402 --out->tv_sec; 1403 out->tv_usec += 1000000; 1404 } 1405 out->tv_sec -= in->tv_sec; 1406 } 1407 1408 /* 1409 * status -- 1410 * Print out statistics when SIGINFO is received. 1411 */ 1412 1413 static void 1414 status(int sig __unused) 1415 { 1416 1417 siginfo_p = 1; 1418 } 1419 1420 static void 1421 check_status(void) 1422 { 1423 1424 if (siginfo_p) { 1425 siginfo_p = 0; 1426 (void)fprintf(stderr, "\r%ld/%ld packets received (%.1f%%)", 1427 nreceived, ntransmitted, 1428 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0); 1429 if (nreceived && timing) 1430 (void)fprintf(stderr, " %.3f min / %.3f avg / %.3f max", 1431 tmin, tsum / (nreceived + nrepeats), tmax); 1432 (void)fprintf(stderr, "\n"); 1433 } 1434 } 1435 1436 /* 1437 * finish -- 1438 * Print out statistics, and give up. 1439 */ 1440 static void 1441 finish(void) 1442 { 1443 1444 (void)signal(SIGINT, SIG_IGN); 1445 (void)signal(SIGALRM, SIG_IGN); 1446 (void)putchar('\n'); 1447 (void)fflush(stdout); 1448 (void)printf("--- %s ping statistics ---\n", hostname); 1449 (void)printf("%ld packets transmitted, ", ntransmitted); 1450 (void)printf("%ld packets received, ", nreceived); 1451 if (nrepeats) 1452 (void)printf("+%ld duplicates, ", nrepeats); 1453 if (ntransmitted) { 1454 if (nreceived > ntransmitted) 1455 (void)printf("-- somebody's printing up packets!"); 1456 else 1457 (void)printf("%.1f%% packet loss", 1458 ((ntransmitted - nreceived) * 100.0) / 1459 ntransmitted); 1460 } 1461 if (nrcvtimeout) 1462 (void)printf(", %ld packets out of wait time", nrcvtimeout); 1463 (void)putchar('\n'); 1464 if (nreceived && timing) { 1465 double n = nreceived + nrepeats; 1466 double avg = tsum / n; 1467 double vari = tsumsq / n - avg * avg; 1468 (void)printf( 1469 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", 1470 tmin, avg, tmax, sqrt(vari)); 1471 } 1472 1473 if (nreceived) 1474 exit(0); 1475 else 1476 exit(2); 1477 } 1478 1479 #ifdef notdef 1480 static char *ttab[] = { 1481 "Echo Reply", /* ip + seq + udata */ 1482 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */ 1483 "Source Quench", /* IP */ 1484 "Redirect", /* redirect type, gateway, + IP */ 1485 "Echo", 1486 "Time Exceeded", /* transit, frag reassem + IP */ 1487 "Parameter Problem", /* pointer + IP */ 1488 "Timestamp", /* id + seq + three timestamps */ 1489 "Timestamp Reply", /* " */ 1490 "Info Request", /* id + sq */ 1491 "Info Reply" /* " */ 1492 }; 1493 #endif 1494 1495 /* 1496 * pr_icmph -- 1497 * Print a descriptive string about an ICMP header. 1498 */ 1499 static void 1500 pr_icmph(struct icmp *icp) 1501 { 1502 1503 switch(icp->icmp_type) { 1504 case ICMP_ECHOREPLY: 1505 (void)printf("Echo Reply\n"); 1506 /* XXX ID + Seq + Data */ 1507 break; 1508 case ICMP_UNREACH: 1509 switch(icp->icmp_code) { 1510 case ICMP_UNREACH_NET: 1511 (void)printf("Destination Net Unreachable\n"); 1512 break; 1513 case ICMP_UNREACH_HOST: 1514 (void)printf("Destination Host Unreachable\n"); 1515 break; 1516 case ICMP_UNREACH_PROTOCOL: 1517 (void)printf("Destination Protocol Unreachable\n"); 1518 break; 1519 case ICMP_UNREACH_PORT: 1520 (void)printf("Destination Port Unreachable\n"); 1521 break; 1522 case ICMP_UNREACH_NEEDFRAG: 1523 (void)printf("frag needed and DF set (MTU %d)\n", 1524 ntohs(icp->icmp_nextmtu)); 1525 break; 1526 case ICMP_UNREACH_SRCFAIL: 1527 (void)printf("Source Route Failed\n"); 1528 break; 1529 case ICMP_UNREACH_FILTER_PROHIB: 1530 (void)printf("Communication prohibited by filter\n"); 1531 break; 1532 default: 1533 (void)printf("Dest Unreachable, Bad Code: %d\n", 1534 icp->icmp_code); 1535 break; 1536 } 1537 /* Print returned IP header information */ 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_SOURCEQUENCH: 1545 (void)printf("Source Quench\n"); 1546 #ifndef icmp_data 1547 pr_retip(&icp->icmp_ip); 1548 #else 1549 pr_retip((struct ip *)icp->icmp_data); 1550 #endif 1551 break; 1552 case ICMP_REDIRECT: 1553 switch(icp->icmp_code) { 1554 case ICMP_REDIRECT_NET: 1555 (void)printf("Redirect Network"); 1556 break; 1557 case ICMP_REDIRECT_HOST: 1558 (void)printf("Redirect Host"); 1559 break; 1560 case ICMP_REDIRECT_TOSNET: 1561 (void)printf("Redirect Type of Service and Network"); 1562 break; 1563 case ICMP_REDIRECT_TOSHOST: 1564 (void)printf("Redirect Type of Service and Host"); 1565 break; 1566 default: 1567 (void)printf("Redirect, Bad Code: %d", icp->icmp_code); 1568 break; 1569 } 1570 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr)); 1571 #ifndef icmp_data 1572 pr_retip(&icp->icmp_ip); 1573 #else 1574 pr_retip((struct ip *)icp->icmp_data); 1575 #endif 1576 break; 1577 case ICMP_ECHO: 1578 (void)printf("Echo Request\n"); 1579 /* XXX ID + Seq + Data */ 1580 break; 1581 case ICMP_TIMXCEED: 1582 switch(icp->icmp_code) { 1583 case ICMP_TIMXCEED_INTRANS: 1584 (void)printf("Time to live exceeded\n"); 1585 break; 1586 case ICMP_TIMXCEED_REASS: 1587 (void)printf("Frag reassembly time exceeded\n"); 1588 break; 1589 default: 1590 (void)printf("Time exceeded, Bad Code: %d\n", 1591 icp->icmp_code); 1592 break; 1593 } 1594 #ifndef icmp_data 1595 pr_retip(&icp->icmp_ip); 1596 #else 1597 pr_retip((struct ip *)icp->icmp_data); 1598 #endif 1599 break; 1600 case ICMP_PARAMPROB: 1601 (void)printf("Parameter problem: pointer = 0x%02x\n", 1602 icp->icmp_hun.ih_pptr); 1603 #ifndef icmp_data 1604 pr_retip(&icp->icmp_ip); 1605 #else 1606 pr_retip((struct ip *)icp->icmp_data); 1607 #endif 1608 break; 1609 case ICMP_TSTAMP: 1610 (void)printf("Timestamp\n"); 1611 /* XXX ID + Seq + 3 timestamps */ 1612 break; 1613 case ICMP_TSTAMPREPLY: 1614 (void)printf("Timestamp Reply\n"); 1615 /* XXX ID + Seq + 3 timestamps */ 1616 break; 1617 case ICMP_IREQ: 1618 (void)printf("Information Request\n"); 1619 /* XXX ID + Seq */ 1620 break; 1621 case ICMP_IREQREPLY: 1622 (void)printf("Information Reply\n"); 1623 /* XXX ID + Seq */ 1624 break; 1625 case ICMP_MASKREQ: 1626 (void)printf("Address Mask Request\n"); 1627 break; 1628 case ICMP_MASKREPLY: 1629 (void)printf("Address Mask Reply\n"); 1630 break; 1631 case ICMP_ROUTERADVERT: 1632 (void)printf("Router Advertisement\n"); 1633 break; 1634 case ICMP_ROUTERSOLICIT: 1635 (void)printf("Router Solicitation\n"); 1636 break; 1637 default: 1638 (void)printf("Bad ICMP type: %d\n", icp->icmp_type); 1639 } 1640 } 1641 1642 /* 1643 * pr_iph -- 1644 * Print an IP header with options. 1645 */ 1646 static void 1647 pr_iph(struct ip *ip) 1648 { 1649 struct in_addr ina; 1650 u_char *cp; 1651 int hlen; 1652 1653 hlen = ip->ip_hl << 2; 1654 cp = (u_char *)ip + 20; /* point to options */ 1655 1656 (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1657 (void)printf(" %1x %1x %02x %04x %04x", 1658 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len), 1659 ntohs(ip->ip_id)); 1660 (void)printf(" %1lx %04lx", 1661 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13, 1662 (u_long) ntohl(ip->ip_off) & 0x1fff); 1663 (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, 1664 ntohs(ip->ip_sum)); 1665 memcpy(&ina, &ip->ip_src.s_addr, sizeof ina); 1666 (void)printf(" %s ", inet_ntoa(ina)); 1667 memcpy(&ina, &ip->ip_dst.s_addr, sizeof ina); 1668 (void)printf(" %s ", inet_ntoa(ina)); 1669 /* dump any option bytes */ 1670 while (hlen-- > 20) { 1671 (void)printf("%02x", *cp++); 1672 } 1673 (void)putchar('\n'); 1674 } 1675 1676 /* 1677 * pr_addr -- 1678 * Return an ascii host address as a dotted quad and optionally with 1679 * a hostname. 1680 */ 1681 static char * 1682 pr_addr(struct in_addr ina) 1683 { 1684 struct hostent *hp; 1685 static char buf[16 + 3 + MAXHOSTNAMELEN]; 1686 1687 if (options & F_NUMERIC) 1688 return inet_ntoa(ina); 1689 1690 hp = cap_gethostbyaddr(capdns, (char *)&ina, 4, AF_INET); 1691 1692 if (hp == NULL) 1693 return inet_ntoa(ina); 1694 1695 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1696 inet_ntoa(ina)); 1697 return(buf); 1698 } 1699 1700 /* 1701 * pr_retip -- 1702 * Dump some info on a returned (via ICMP) IP packet. 1703 */ 1704 static void 1705 pr_retip(struct ip *ip) 1706 { 1707 u_char *cp; 1708 int hlen; 1709 1710 pr_iph(ip); 1711 hlen = ip->ip_hl << 2; 1712 cp = (u_char *)ip + hlen; 1713 1714 if (ip->ip_p == 6) 1715 (void)printf("TCP: from port %u, to port %u (decimal)\n", 1716 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1717 else if (ip->ip_p == 17) 1718 (void)printf("UDP: from port %u, to port %u (decimal)\n", 1719 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1720 } 1721 1722 static char * 1723 pr_ntime(n_time timestamp) 1724 { 1725 static char buf[10]; 1726 int hour, min, sec; 1727 1728 sec = ntohl(timestamp) / 1000; 1729 hour = sec / 60 / 60; 1730 min = (sec % (60 * 60)) / 60; 1731 sec = (sec % (60 * 60)) % 60; 1732 1733 (void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec); 1734 1735 return (buf); 1736 } 1737 1738 static void 1739 fill(char *bp, char *patp) 1740 { 1741 char *cp; 1742 int pat[16]; 1743 u_int ii, jj, kk; 1744 1745 for (cp = patp; *cp; cp++) { 1746 if (!isxdigit(*cp)) 1747 errx(EX_USAGE, 1748 "patterns must be specified as hex digits"); 1749 1750 } 1751 ii = sscanf(patp, 1752 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1753 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 1754 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 1755 &pat[13], &pat[14], &pat[15]); 1756 1757 if (ii > 0) 1758 for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii) 1759 for (jj = 0; jj < ii; ++jj) 1760 bp[jj + kk] = pat[jj]; 1761 if (!(options & F_QUIET)) { 1762 (void)printf("PATTERN: 0x"); 1763 for (jj = 0; jj < ii; ++jj) 1764 (void)printf("%02x", bp[jj] & 0xFF); 1765 (void)printf("\n"); 1766 } 1767 } 1768 1769 static cap_channel_t * 1770 capdns_setup(void) 1771 { 1772 cap_channel_t *capcas, *capdnsloc; 1773 const char *types[2]; 1774 int families[1]; 1775 1776 capcas = cap_init(); 1777 if (capcas == NULL) 1778 err(1, "unable to create casper process"); 1779 capdnsloc = cap_service_open(capcas, "system.dns"); 1780 /* Casper capability no longer needed. */ 1781 cap_close(capcas); 1782 if (capdnsloc == NULL) 1783 err(1, "unable to open system.dns service"); 1784 types[0] = "NAME2ADDR"; 1785 types[1] = "ADDR2NAME"; 1786 if (cap_dns_type_limit(capdnsloc, types, 2) < 0) 1787 err(1, "unable to limit access to system.dns service"); 1788 families[0] = AF_INET; 1789 if (cap_dns_family_limit(capdnsloc, families, 1) < 0) 1790 err(1, "unable to limit access to system.dns service"); 1791 1792 return (capdnsloc); 1793 } 1794 1795 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 1796 #define SECOPT " [-P policy]" 1797 #else 1798 #define SECOPT "" 1799 #endif 1800 static void 1801 usage(void) 1802 { 1803 1804 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 1805 "usage: ping [-AaDdfnoQqRrv] [-c count] [-G sweepmaxsize] [-g sweepminsize]", 1806 " [-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]", 1807 " " SECOPT " [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]", 1808 " [-W waittime] [-z tos] host", 1809 " ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]", 1810 " [-M mask | time] [-m ttl]" SECOPT " [-p pattern] [-S src_addr]", 1811 " [-s packetsize] [-T ttl] [-t timeout] [-W waittime]", 1812 " [-z tos] mcast-group"); 1813 exit(EX_USAGE); 1814 } 1815