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, ultmp; 246 int almost_done, ch, df, hold, i, icmp_len, mib[4], preload; 247 int ssend_errno, srecv_errno, tos, ttl; 248 char ctrl[CMSG_SPACE(sizeof(struct timeval))]; 249 char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN]; 250 #ifdef IP_OPTIONS 251 char rspace[MAX_IPOPTLEN]; /* record route space */ 252 #endif 253 unsigned char loop, mttl; 254 255 payload = source = NULL; 256 #ifdef IPSEC_POLICY_IPSEC 257 policy_in = policy_out = NULL; 258 #endif 259 cap_rights_t rights; 260 bool cansandbox; 261 262 /* 263 * Do the stuff that we need root priv's for *first*, and 264 * then drop our setuid bit. Save error reporting for 265 * after arg parsing. 266 * 267 * Historicaly ping was using one socket 's' for sending and for 268 * receiving. After capsicum(4) related changes we use two 269 * sockets. It was done for special ping use case - when user 270 * issue ping on multicast or broadcast address replies come 271 * from different addresses, not from the address we 272 * connect(2)'ed to, and send socket do not receive those 273 * packets. 274 */ 275 ssend = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 276 ssend_errno = errno; 277 srecv = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 278 srecv_errno = errno; 279 280 if (setuid(getuid()) != 0) 281 err(EX_NOPERM, "setuid() failed"); 282 uid = getuid(); 283 284 if (ssend < 0) { 285 errno = ssend_errno; 286 err(EX_OSERR, "ssend socket"); 287 } 288 289 if (srecv < 0) { 290 errno = srecv_errno; 291 err(EX_OSERR, "srecv socket"); 292 } 293 294 alarmtimeout = df = preload = tos = 0; 295 296 outpack = outpackhdr + sizeof(struct ip); 297 while ((ch = getopt(argc, argv, 298 "Aac:DdfG:g:h:I:i:Ll:M:m:nop:QqRrS:s:T:t:vW:z:" 299 #ifdef IPSEC 300 #ifdef IPSEC_POLICY_IPSEC 301 "P:" 302 #endif /*IPSEC_POLICY_IPSEC*/ 303 #endif /*IPSEC*/ 304 )) != -1) 305 { 306 switch(ch) { 307 case 'A': 308 options |= F_MISSED; 309 break; 310 case 'a': 311 options |= F_AUDIBLE; 312 break; 313 case 'c': 314 ultmp = strtoul(optarg, &ep, 0); 315 if (*ep || ep == optarg || ultmp > LONG_MAX || !ultmp) 316 errx(EX_USAGE, 317 "invalid count of packets to transmit: `%s'", 318 optarg); 319 npackets = ultmp; 320 break; 321 case 'D': 322 options |= F_HDRINCL; 323 df = 1; 324 break; 325 case 'd': 326 options |= F_SO_DEBUG; 327 break; 328 case 'f': 329 if (uid) { 330 errno = EPERM; 331 err(EX_NOPERM, "-f flag"); 332 } 333 options |= F_FLOOD; 334 setbuf(stdout, (char *)NULL); 335 break; 336 case 'G': /* Maximum packet size for ping sweep */ 337 ultmp = strtoul(optarg, &ep, 0); 338 if (*ep || ep == optarg) 339 errx(EX_USAGE, "invalid packet size: `%s'", 340 optarg); 341 if (uid != 0 && ultmp > DEFDATALEN) { 342 errno = EPERM; 343 err(EX_NOPERM, 344 "packet size too large: %lu > %u", 345 ultmp, DEFDATALEN); 346 } 347 options |= F_SWEEP; 348 sweepmax = ultmp; 349 break; 350 case 'g': /* Minimum packet size for ping sweep */ 351 ultmp = strtoul(optarg, &ep, 0); 352 if (*ep || ep == optarg) 353 errx(EX_USAGE, "invalid packet size: `%s'", 354 optarg); 355 if (uid != 0 && ultmp > DEFDATALEN) { 356 errno = EPERM; 357 err(EX_NOPERM, 358 "packet size too large: %lu > %u", 359 ultmp, DEFDATALEN); 360 } 361 options |= F_SWEEP; 362 sweepmin = ultmp; 363 break; 364 case 'h': /* Packet size increment for ping sweep */ 365 ultmp = strtoul(optarg, &ep, 0); 366 if (*ep || ep == optarg || ultmp < 1) 367 errx(EX_USAGE, "invalid increment size: `%s'", 368 optarg); 369 if (uid != 0 && ultmp > DEFDATALEN) { 370 errno = EPERM; 371 err(EX_NOPERM, 372 "packet size too large: %lu > %u", 373 ultmp, DEFDATALEN); 374 } 375 options |= F_SWEEP; 376 sweepincr = ultmp; 377 break; 378 case 'I': /* multicast interface */ 379 if (inet_aton(optarg, &ifaddr) == 0) 380 errx(EX_USAGE, 381 "invalid multicast interface: `%s'", 382 optarg); 383 options |= F_MIF; 384 break; 385 case 'i': /* wait between sending packets */ 386 t = strtod(optarg, &ep) * 1000.0; 387 if (*ep || ep == optarg || t > (double)INT_MAX) 388 errx(EX_USAGE, "invalid timing interval: `%s'", 389 optarg); 390 options |= F_INTERVAL; 391 interval = (int)t; 392 if (uid && interval < 1000) { 393 errno = EPERM; 394 err(EX_NOPERM, "-i interval too short"); 395 } 396 break; 397 case 'L': 398 options |= F_NOLOOP; 399 loop = 0; 400 break; 401 case 'l': 402 ultmp = strtoul(optarg, &ep, 0); 403 if (*ep || ep == optarg || ultmp > INT_MAX) 404 errx(EX_USAGE, 405 "invalid preload value: `%s'", optarg); 406 if (uid) { 407 errno = EPERM; 408 err(EX_NOPERM, "-l flag"); 409 } 410 preload = ultmp; 411 break; 412 case 'M': 413 switch(optarg[0]) { 414 case 'M': 415 case 'm': 416 options |= F_MASK; 417 break; 418 case 'T': 419 case 't': 420 options |= F_TIME; 421 break; 422 default: 423 errx(EX_USAGE, "invalid message: `%c'", optarg[0]); 424 break; 425 } 426 break; 427 case 'm': /* TTL */ 428 ultmp = strtoul(optarg, &ep, 0); 429 if (*ep || ep == optarg || ultmp > MAXTTL) 430 errx(EX_USAGE, "invalid TTL: `%s'", optarg); 431 ttl = ultmp; 432 options |= F_TTL; 433 break; 434 case 'n': 435 options |= F_NUMERIC; 436 break; 437 case 'o': 438 options |= F_ONCE; 439 break; 440 #ifdef IPSEC 441 #ifdef IPSEC_POLICY_IPSEC 442 case 'P': 443 options |= F_POLICY; 444 if (!strncmp("in", optarg, 2)) 445 policy_in = strdup(optarg); 446 else if (!strncmp("out", optarg, 3)) 447 policy_out = strdup(optarg); 448 else 449 errx(1, "invalid security policy"); 450 break; 451 #endif /*IPSEC_POLICY_IPSEC*/ 452 #endif /*IPSEC*/ 453 case 'p': /* fill buffer with user pattern */ 454 options |= F_PINGFILLED; 455 payload = optarg; 456 break; 457 case 'Q': 458 options |= F_QUIET2; 459 break; 460 case 'q': 461 options |= F_QUIET; 462 break; 463 case 'R': 464 options |= F_RROUTE; 465 break; 466 case 'r': 467 options |= F_SO_DONTROUTE; 468 break; 469 case 'S': 470 source = optarg; 471 break; 472 case 's': /* size of packet to send */ 473 ultmp = strtoul(optarg, &ep, 0); 474 if (*ep || ep == optarg) 475 errx(EX_USAGE, "invalid packet size: `%s'", 476 optarg); 477 if (uid != 0 && ultmp > DEFDATALEN) { 478 errno = EPERM; 479 err(EX_NOPERM, 480 "packet size too large: %lu > %u", 481 ultmp, DEFDATALEN); 482 } 483 datalen = ultmp; 484 break; 485 case 'T': /* multicast TTL */ 486 ultmp = strtoul(optarg, &ep, 0); 487 if (*ep || ep == optarg || ultmp > MAXTTL) 488 errx(EX_USAGE, "invalid multicast TTL: `%s'", 489 optarg); 490 mttl = ultmp; 491 options |= F_MTTL; 492 break; 493 case 't': 494 alarmtimeout = strtoul(optarg, &ep, 0); 495 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 496 errx(EX_USAGE, "invalid timeout: `%s'", 497 optarg); 498 if (alarmtimeout > MAXALARM) 499 errx(EX_USAGE, "invalid timeout: `%s' > %d", 500 optarg, MAXALARM); 501 alarm((int)alarmtimeout); 502 break; 503 case 'v': 504 options |= F_VERBOSE; 505 break; 506 case 'W': /* wait ms for answer */ 507 t = strtod(optarg, &ep); 508 if (*ep || ep == optarg || t > (double)INT_MAX) 509 errx(EX_USAGE, "invalid timing interval: `%s'", 510 optarg); 511 options |= F_WAITTIME; 512 waittime = (int)t; 513 break; 514 case 'z': 515 options |= F_HDRINCL; 516 ultmp = strtoul(optarg, &ep, 0); 517 if (*ep || ep == optarg || ultmp > MAXTOS) 518 errx(EX_USAGE, "invalid TOS: `%s'", optarg); 519 tos = ultmp; 520 break; 521 default: 522 usage(); 523 } 524 } 525 526 if (argc - optind != 1) 527 usage(); 528 target = argv[optind]; 529 530 switch (options & (F_MASK|F_TIME)) { 531 case 0: break; 532 case F_MASK: 533 icmp_type = ICMP_MASKREQ; 534 icmp_type_rsp = ICMP_MASKREPLY; 535 phdr_len = MASK_LEN; 536 if (!(options & F_QUIET)) 537 (void)printf("ICMP_MASKREQ\n"); 538 break; 539 case F_TIME: 540 icmp_type = ICMP_TSTAMP; 541 icmp_type_rsp = ICMP_TSTAMPREPLY; 542 phdr_len = TS_LEN; 543 if (!(options & F_QUIET)) 544 (void)printf("ICMP_TSTAMP\n"); 545 break; 546 default: 547 errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive."); 548 break; 549 } 550 icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len; 551 if (options & F_RROUTE) 552 icmp_len += MAX_IPOPTLEN; 553 maxpayload = IP_MAXPACKET - icmp_len; 554 if (datalen > maxpayload) 555 errx(EX_USAGE, "packet size too large: %d > %d", datalen, 556 maxpayload); 557 send_len = icmp_len + datalen; 558 datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN]; 559 if (options & F_PINGFILLED) { 560 fill((char *)datap, payload); 561 } 562 capdns = capdns_setup(); 563 if (source) { 564 bzero((char *)&sock_in, sizeof(sock_in)); 565 sock_in.sin_family = AF_INET; 566 if (inet_aton(source, &sock_in.sin_addr) != 0) { 567 shostname = source; 568 } else { 569 hp = cap_gethostbyname2(capdns, source, AF_INET); 570 if (!hp) 571 errx(EX_NOHOST, "cannot resolve %s: %s", 572 source, hstrerror(h_errno)); 573 574 sock_in.sin_len = sizeof sock_in; 575 if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) || 576 hp->h_length < 0) 577 errx(1, "gethostbyname2: illegal address"); 578 memcpy(&sock_in.sin_addr, hp->h_addr_list[0], 579 sizeof(sock_in.sin_addr)); 580 (void)strncpy(snamebuf, hp->h_name, 581 sizeof(snamebuf) - 1); 582 snamebuf[sizeof(snamebuf) - 1] = '\0'; 583 shostname = snamebuf; 584 } 585 if (bind(ssend, (struct sockaddr *)&sock_in, sizeof sock_in) == 586 -1) 587 err(1, "bind"); 588 } 589 590 bzero(&whereto, sizeof(whereto)); 591 to = &whereto; 592 to->sin_family = AF_INET; 593 to->sin_len = sizeof *to; 594 if (inet_aton(target, &to->sin_addr) != 0) { 595 hostname = target; 596 } else { 597 hp = cap_gethostbyname2(capdns, target, AF_INET); 598 if (!hp) 599 errx(EX_NOHOST, "cannot resolve %s: %s", 600 target, hstrerror(h_errno)); 601 602 if ((unsigned)hp->h_length > sizeof(to->sin_addr)) 603 errx(1, "gethostbyname2 returned an illegal address"); 604 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr); 605 (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1); 606 hnamebuf[sizeof(hnamebuf) - 1] = '\0'; 607 hostname = hnamebuf; 608 } 609 610 /* From now on we will use only reverse DNS lookups. */ 611 if (capdns != NULL) { 612 const char *types[1]; 613 614 types[0] = "ADDR"; 615 if (cap_dns_type_limit(capdns, types, 1) < 0) 616 err(1, "unable to limit access to system.dns service"); 617 } 618 619 if (connect(ssend, (struct sockaddr *)&whereto, sizeof(whereto)) != 0) 620 err(1, "connect"); 621 622 if (options & F_FLOOD && options & F_INTERVAL) 623 errx(EX_USAGE, "-f and -i: incompatible options"); 624 625 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 626 errx(EX_USAGE, 627 "-f flag cannot be used with multicast destination"); 628 if (options & (F_MIF | F_NOLOOP | F_MTTL) 629 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 630 errx(EX_USAGE, 631 "-I, -L, -T flags cannot be used with unicast destination"); 632 633 if (datalen >= TIMEVAL_LEN) /* can we time transfer */ 634 timing = 1; 635 636 if (!(options & F_PINGFILLED)) 637 for (i = TIMEVAL_LEN; i < datalen; ++i) 638 *datap++ = i; 639 640 ident = getpid() & 0xFFFF; 641 642 hold = 1; 643 if (options & F_SO_DEBUG) { 644 (void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold, 645 sizeof(hold)); 646 (void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold, 647 sizeof(hold)); 648 } 649 if (options & F_SO_DONTROUTE) 650 (void)setsockopt(ssend, SOL_SOCKET, SO_DONTROUTE, (char *)&hold, 651 sizeof(hold)); 652 #ifdef IPSEC 653 #ifdef IPSEC_POLICY_IPSEC 654 if (options & F_POLICY) { 655 char *buf; 656 if (policy_in != NULL) { 657 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 658 if (buf == NULL) 659 errx(EX_CONFIG, "%s", ipsec_strerror()); 660 if (setsockopt(srecv, IPPROTO_IP, IP_IPSEC_POLICY, 661 buf, ipsec_get_policylen(buf)) < 0) 662 err(EX_CONFIG, 663 "ipsec policy cannot be configured"); 664 free(buf); 665 } 666 667 if (policy_out != NULL) { 668 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 669 if (buf == NULL) 670 errx(EX_CONFIG, "%s", ipsec_strerror()); 671 if (setsockopt(ssend, IPPROTO_IP, IP_IPSEC_POLICY, 672 buf, ipsec_get_policylen(buf)) < 0) 673 err(EX_CONFIG, 674 "ipsec policy cannot be configured"); 675 free(buf); 676 } 677 } 678 #endif /*IPSEC_POLICY_IPSEC*/ 679 #endif /*IPSEC*/ 680 681 if (options & F_HDRINCL) { 682 ip = (struct ip*)outpackhdr; 683 if (!(options & (F_TTL | F_MTTL))) { 684 mib[0] = CTL_NET; 685 mib[1] = PF_INET; 686 mib[2] = IPPROTO_IP; 687 mib[3] = IPCTL_DEFTTL; 688 sz = sizeof(ttl); 689 if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1) 690 err(1, "sysctl(net.inet.ip.ttl)"); 691 } 692 setsockopt(ssend, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold)); 693 ip->ip_v = IPVERSION; 694 ip->ip_hl = sizeof(struct ip) >> 2; 695 ip->ip_tos = tos; 696 ip->ip_id = 0; 697 ip->ip_off = htons(df ? IP_DF : 0); 698 ip->ip_ttl = ttl; 699 ip->ip_p = IPPROTO_ICMP; 700 ip->ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY; 701 ip->ip_dst = to->sin_addr; 702 } 703 704 if (options & F_NUMERIC) 705 cansandbox = true; 706 else if (capdns != NULL) 707 cansandbox = CASPER_SUPPORT; 708 else 709 cansandbox = false; 710 711 /* 712 * Here we enter capability mode. Further down access to global 713 * namespaces (e.g filesystem) is restricted (see capsicum(4)). 714 * We must connect(2) our socket before this point. 715 */ 716 if (cansandbox && cap_enter() < 0 && errno != ENOSYS) 717 err(1, "cap_enter"); 718 719 cap_rights_init(&rights, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT); 720 if (cap_rights_limit(srecv, &rights) < 0 && errno != ENOSYS) 721 err(1, "cap_rights_limit srecv"); 722 723 cap_rights_init(&rights, CAP_SEND, CAP_SETSOCKOPT); 724 if (cap_rights_limit(ssend, &rights) < 0 && errno != ENOSYS) 725 err(1, "cap_rights_limit ssend"); 726 727 /* record route option */ 728 if (options & F_RROUTE) { 729 #ifdef IP_OPTIONS 730 bzero(rspace, sizeof(rspace)); 731 rspace[IPOPT_OPTVAL] = IPOPT_RR; 732 rspace[IPOPT_OLEN] = sizeof(rspace) - 1; 733 rspace[IPOPT_OFFSET] = IPOPT_MINOFF; 734 rspace[sizeof(rspace) - 1] = IPOPT_EOL; 735 if (setsockopt(ssend, IPPROTO_IP, IP_OPTIONS, rspace, 736 sizeof(rspace)) < 0) 737 err(EX_OSERR, "setsockopt IP_OPTIONS"); 738 #else 739 errx(EX_UNAVAILABLE, 740 "record route not available in this implementation"); 741 #endif /* IP_OPTIONS */ 742 } 743 744 if (options & F_TTL) { 745 if (setsockopt(ssend, IPPROTO_IP, IP_TTL, &ttl, 746 sizeof(ttl)) < 0) { 747 err(EX_OSERR, "setsockopt IP_TTL"); 748 } 749 } 750 if (options & F_NOLOOP) { 751 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, 752 sizeof(loop)) < 0) { 753 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP"); 754 } 755 } 756 if (options & F_MTTL) { 757 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_TTL, &mttl, 758 sizeof(mttl)) < 0) { 759 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL"); 760 } 761 } 762 if (options & F_MIF) { 763 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr, 764 sizeof(ifaddr)) < 0) { 765 err(EX_OSERR, "setsockopt IP_MULTICAST_IF"); 766 } 767 } 768 #ifdef SO_TIMESTAMP 769 { int on = 1; 770 if (setsockopt(srecv, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)) < 0) 771 err(EX_OSERR, "setsockopt SO_TIMESTAMP"); 772 } 773 #endif 774 if (sweepmax) { 775 if (sweepmin > sweepmax) 776 errx(EX_USAGE, "Maximum packet size must be no less than the minimum packet size"); 777 778 if (datalen != DEFDATALEN) 779 errx(EX_USAGE, "Packet size and ping sweep are mutually exclusive"); 780 781 if (npackets > 0) { 782 snpackets = npackets; 783 npackets = 0; 784 } else 785 snpackets = 1; 786 datalen = sweepmin; 787 send_len = icmp_len + sweepmin; 788 } 789 if (options & F_SWEEP && !sweepmax) 790 errx(EX_USAGE, "Maximum sweep size must be specified"); 791 792 /* 793 * When pinging the broadcast address, you can get a lot of answers. 794 * Doing something so evil is useful if you are trying to stress the 795 * ethernet, or just want to fill the arp cache to get some stuff for 796 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast 797 * or multicast pings if they wish. 798 */ 799 800 /* 801 * XXX receive buffer needs undetermined space for mbuf overhead 802 * as well. 803 */ 804 hold = IP_MAXPACKET + 128; 805 (void)setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 806 sizeof(hold)); 807 /* CAP_SETSOCKOPT removed */ 808 cap_rights_init(&rights, CAP_RECV, CAP_EVENT); 809 if (cap_rights_limit(srecv, &rights) < 0 && errno != ENOSYS) 810 err(1, "cap_rights_limit srecv setsockopt"); 811 if (uid == 0) 812 (void)setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, (char *)&hold, 813 sizeof(hold)); 814 /* CAP_SETSOCKOPT removed */ 815 cap_rights_init(&rights, CAP_SEND); 816 if (cap_rights_limit(ssend, &rights) < 0 && errno != ENOSYS) 817 err(1, "cap_rights_limit ssend setsockopt"); 818 819 if (to->sin_family == AF_INET) { 820 (void)printf("PING %s (%s)", hostname, 821 inet_ntoa(to->sin_addr)); 822 if (source) 823 (void)printf(" from %s", shostname); 824 if (sweepmax) 825 (void)printf(": (%d ... %d) data bytes\n", 826 sweepmin, sweepmax); 827 else 828 (void)printf(": %d data bytes\n", datalen); 829 830 } else { 831 if (sweepmax) 832 (void)printf("PING %s: (%d ... %d) data bytes\n", 833 hostname, sweepmin, sweepmax); 834 else 835 (void)printf("PING %s: %d data bytes\n", hostname, datalen); 836 } 837 838 /* 839 * Use sigaction() instead of signal() to get unambiguous semantics, 840 * in particular with SA_RESTART not set. 841 */ 842 843 sigemptyset(&si_sa.sa_mask); 844 si_sa.sa_flags = 0; 845 846 si_sa.sa_handler = stopit; 847 if (sigaction(SIGINT, &si_sa, 0) == -1) { 848 err(EX_OSERR, "sigaction SIGINT"); 849 } 850 851 si_sa.sa_handler = status; 852 if (sigaction(SIGINFO, &si_sa, 0) == -1) { 853 err(EX_OSERR, "sigaction"); 854 } 855 856 if (alarmtimeout > 0) { 857 si_sa.sa_handler = stopit; 858 if (sigaction(SIGALRM, &si_sa, 0) == -1) 859 err(EX_OSERR, "sigaction SIGALRM"); 860 } 861 862 bzero(&msg, sizeof(msg)); 863 msg.msg_name = (caddr_t)&from; 864 msg.msg_iov = &iov; 865 msg.msg_iovlen = 1; 866 #ifdef SO_TIMESTAMP 867 msg.msg_control = (caddr_t)ctrl; 868 #endif 869 iov.iov_base = packet; 870 iov.iov_len = IP_MAXPACKET; 871 872 if (preload == 0) 873 pinger(); /* send the first ping */ 874 else { 875 if (npackets != 0 && preload > npackets) 876 preload = npackets; 877 while (preload--) /* fire off them quickies */ 878 pinger(); 879 } 880 (void)gettimeofday(&last, NULL); 881 882 if (options & F_FLOOD) { 883 intvl.tv_sec = 0; 884 intvl.tv_usec = 10000; 885 } else { 886 intvl.tv_sec = interval / 1000; 887 intvl.tv_usec = interval % 1000 * 1000; 888 } 889 890 almost_done = 0; 891 while (!finish_up) { 892 struct timeval now, timeout; 893 fd_set rfds; 894 int cc, n; 895 896 check_status(); 897 if ((unsigned)srecv >= FD_SETSIZE) 898 errx(EX_OSERR, "descriptor too large"); 899 FD_ZERO(&rfds); 900 FD_SET(srecv, &rfds); 901 (void)gettimeofday(&now, NULL); 902 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec; 903 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec; 904 while (timeout.tv_usec < 0) { 905 timeout.tv_usec += 1000000; 906 timeout.tv_sec--; 907 } 908 while (timeout.tv_usec >= 1000000) { 909 timeout.tv_usec -= 1000000; 910 timeout.tv_sec++; 911 } 912 if (timeout.tv_sec < 0) 913 timerclear(&timeout); 914 n = select(srecv + 1, &rfds, NULL, NULL, &timeout); 915 if (n < 0) 916 continue; /* Must be EINTR. */ 917 if (n == 1) { 918 struct timeval *tv = NULL; 919 #ifdef SO_TIMESTAMP 920 struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl; 921 922 msg.msg_controllen = sizeof(ctrl); 923 #endif 924 msg.msg_namelen = sizeof(from); 925 if ((cc = recvmsg(srecv, &msg, 0)) < 0) { 926 if (errno == EINTR) 927 continue; 928 warn("recvmsg"); 929 continue; 930 } 931 #ifdef SO_TIMESTAMP 932 if (cmsg->cmsg_level == SOL_SOCKET && 933 cmsg->cmsg_type == SCM_TIMESTAMP && 934 cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) { 935 /* Copy to avoid alignment problems: */ 936 memcpy(&now, CMSG_DATA(cmsg), sizeof(now)); 937 tv = &now; 938 } 939 #endif 940 if (tv == NULL) { 941 (void)gettimeofday(&now, NULL); 942 tv = &now; 943 } 944 pr_pack((char *)packet, cc, &from, tv); 945 if ((options & F_ONCE && nreceived) || 946 (npackets && nreceived >= npackets)) 947 break; 948 } 949 if (n == 0 || options & F_FLOOD) { 950 if (sweepmax && sntransmitted == snpackets) { 951 for (i = 0; i < sweepincr ; ++i) 952 *datap++ = i; 953 datalen += sweepincr; 954 if (datalen > sweepmax) 955 break; 956 send_len = icmp_len + datalen; 957 sntransmitted = 0; 958 } 959 if (!npackets || ntransmitted < npackets) 960 pinger(); 961 else { 962 if (almost_done) 963 break; 964 almost_done = 1; 965 intvl.tv_usec = 0; 966 if (nreceived) { 967 intvl.tv_sec = 2 * tmax / 1000; 968 if (!intvl.tv_sec) 969 intvl.tv_sec = 1; 970 } else { 971 intvl.tv_sec = waittime / 1000; 972 intvl.tv_usec = waittime % 1000 * 1000; 973 } 974 } 975 (void)gettimeofday(&last, NULL); 976 if (ntransmitted - nreceived - 1 > nmissedmax) { 977 nmissedmax = ntransmitted - nreceived - 1; 978 if (options & F_MISSED) 979 (void)write(STDOUT_FILENO, &BBELL, 1); 980 } 981 } 982 } 983 finish(); 984 /* NOTREACHED */ 985 exit(0); /* Make the compiler happy */ 986 } 987 988 /* 989 * stopit -- 990 * Set the global bit that causes the main loop to quit. 991 * Do NOT call finish() from here, since finish() does far too much 992 * to be called from a signal handler. 993 */ 994 void 995 stopit(int sig __unused) 996 { 997 998 /* 999 * When doing reverse DNS lookups, the finish_up flag might not 1000 * be noticed for a while. Just exit if we get a second SIGINT. 1001 */ 1002 if (!(options & F_NUMERIC) && finish_up) 1003 _exit(nreceived ? 0 : 2); 1004 finish_up = 1; 1005 } 1006 1007 /* 1008 * pinger -- 1009 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1010 * will be added on by the kernel. The ID field is our UNIX process ID, 1011 * and the sequence number is an ascending integer. The first TIMEVAL_LEN 1012 * bytes of the data portion are used to hold a UNIX "timeval" struct in 1013 * host byte-order, to compute the round-trip time. 1014 */ 1015 static void 1016 pinger(void) 1017 { 1018 struct timeval now; 1019 struct tv32 tv32; 1020 struct ip *ip; 1021 struct icmp *icp; 1022 int cc, i; 1023 u_char *packet; 1024 1025 packet = outpack; 1026 icp = (struct icmp *)outpack; 1027 icp->icmp_type = icmp_type; 1028 icp->icmp_code = 0; 1029 icp->icmp_cksum = 0; 1030 icp->icmp_seq = htons(ntransmitted); 1031 icp->icmp_id = ident; /* ID */ 1032 1033 CLR(ntransmitted % mx_dup_ck); 1034 1035 if ((options & F_TIME) || timing) { 1036 (void)gettimeofday(&now, NULL); 1037 1038 tv32.tv32_sec = htonl(now.tv_sec); 1039 tv32.tv32_usec = htonl(now.tv_usec); 1040 if (options & F_TIME) 1041 icp->icmp_otime = htonl((now.tv_sec % (24*60*60)) 1042 * 1000 + now.tv_usec / 1000); 1043 if (timing) 1044 bcopy((void *)&tv32, 1045 (void *)&outpack[ICMP_MINLEN + phdr_len], 1046 sizeof(tv32)); 1047 } 1048 1049 cc = ICMP_MINLEN + phdr_len + datalen; 1050 1051 /* compute ICMP checksum here */ 1052 icp->icmp_cksum = in_cksum((u_short *)icp, cc); 1053 1054 if (options & F_HDRINCL) { 1055 cc += sizeof(struct ip); 1056 ip = (struct ip *)outpackhdr; 1057 ip->ip_len = htons(cc); 1058 ip->ip_sum = in_cksum((u_short *)outpackhdr, cc); 1059 packet = outpackhdr; 1060 } 1061 i = send(ssend, (char *)packet, cc, 0); 1062 if (i < 0 || i != cc) { 1063 if (i < 0) { 1064 if (options & F_FLOOD && errno == ENOBUFS) { 1065 usleep(FLOOD_BACKOFF); 1066 return; 1067 } 1068 warn("sendto"); 1069 } else { 1070 warn("%s: partial write: %d of %d bytes", 1071 hostname, i, cc); 1072 } 1073 } 1074 ntransmitted++; 1075 sntransmitted++; 1076 if (!(options & F_QUIET) && options & F_FLOOD) 1077 (void)write(STDOUT_FILENO, &DOT, 1); 1078 } 1079 1080 /* 1081 * pr_pack -- 1082 * Print out the packet, if it came from us. This logic is necessary 1083 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1084 * which arrive ('tis only fair). This permits multiple copies of this 1085 * program to be run without having intermingled output (or statistics!). 1086 */ 1087 static void 1088 pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timeval *tv) 1089 { 1090 struct in_addr ina; 1091 u_char *cp, *dp; 1092 struct icmp *icp; 1093 struct ip *ip; 1094 const void *tp; 1095 double triptime; 1096 int dupflag, hlen, i, j, recv_len, seq; 1097 static int old_rrlen; 1098 static char old_rr[MAX_IPOPTLEN]; 1099 1100 /* Check the IP header */ 1101 ip = (struct ip *)buf; 1102 hlen = ip->ip_hl << 2; 1103 recv_len = cc; 1104 if (cc < hlen + ICMP_MINLEN) { 1105 if (options & F_VERBOSE) 1106 warn("packet too short (%d bytes) from %s", cc, 1107 inet_ntoa(from->sin_addr)); 1108 return; 1109 } 1110 1111 /* Now the ICMP part */ 1112 cc -= hlen; 1113 icp = (struct icmp *)(buf + hlen); 1114 if (icp->icmp_type == icmp_type_rsp) { 1115 if (icp->icmp_id != ident) 1116 return; /* 'Twas not our ECHO */ 1117 ++nreceived; 1118 triptime = 0.0; 1119 if (timing) { 1120 struct timeval tv1; 1121 struct tv32 tv32; 1122 #ifndef icmp_data 1123 tp = &icp->icmp_ip; 1124 #else 1125 tp = icp->icmp_data; 1126 #endif 1127 tp = (const char *)tp + phdr_len; 1128 1129 if ((size_t)(cc - ICMP_MINLEN - phdr_len) >= 1130 sizeof(tv1)) { 1131 /* Copy to avoid alignment problems: */ 1132 memcpy(&tv32, tp, sizeof(tv32)); 1133 tv1.tv_sec = ntohl(tv32.tv32_sec); 1134 tv1.tv_usec = ntohl(tv32.tv32_usec); 1135 tvsub(tv, &tv1); 1136 triptime = ((double)tv->tv_sec) * 1000.0 + 1137 ((double)tv->tv_usec) / 1000.0; 1138 tsum += triptime; 1139 tsumsq += triptime * triptime; 1140 if (triptime < tmin) 1141 tmin = triptime; 1142 if (triptime > tmax) 1143 tmax = triptime; 1144 } else 1145 timing = 0; 1146 } 1147 1148 seq = ntohs(icp->icmp_seq); 1149 1150 if (TST(seq % mx_dup_ck)) { 1151 ++nrepeats; 1152 --nreceived; 1153 dupflag = 1; 1154 } else { 1155 SET(seq % mx_dup_ck); 1156 dupflag = 0; 1157 } 1158 1159 if (options & F_QUIET) 1160 return; 1161 1162 if (options & F_WAITTIME && triptime > waittime) { 1163 ++nrcvtimeout; 1164 return; 1165 } 1166 1167 if (options & F_FLOOD) 1168 (void)write(STDOUT_FILENO, &BSPACE, 1); 1169 else { 1170 (void)printf("%d bytes from %s: icmp_seq=%u", cc, 1171 inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr), 1172 seq); 1173 (void)printf(" ttl=%d", ip->ip_ttl); 1174 if (timing) 1175 (void)printf(" time=%.3f ms", triptime); 1176 if (dupflag) 1177 (void)printf(" (DUP!)"); 1178 if (options & F_AUDIBLE) 1179 (void)write(STDOUT_FILENO, &BBELL, 1); 1180 if (options & F_MASK) { 1181 /* Just prentend this cast isn't ugly */ 1182 (void)printf(" mask=%s", 1183 inet_ntoa(*(struct in_addr *)&(icp->icmp_mask))); 1184 } 1185 if (options & F_TIME) { 1186 (void)printf(" tso=%s", pr_ntime(icp->icmp_otime)); 1187 (void)printf(" tsr=%s", pr_ntime(icp->icmp_rtime)); 1188 (void)printf(" tst=%s", pr_ntime(icp->icmp_ttime)); 1189 } 1190 if (recv_len != send_len) { 1191 (void)printf( 1192 "\nwrong total length %d instead of %d", 1193 recv_len, send_len); 1194 } 1195 /* check the data */ 1196 cp = (u_char*)&icp->icmp_data[phdr_len]; 1197 dp = &outpack[ICMP_MINLEN + phdr_len]; 1198 cc -= ICMP_MINLEN + phdr_len; 1199 i = 0; 1200 if (timing) { /* don't check variable timestamp */ 1201 cp += TIMEVAL_LEN; 1202 dp += TIMEVAL_LEN; 1203 cc -= TIMEVAL_LEN; 1204 i += TIMEVAL_LEN; 1205 } 1206 for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) { 1207 if (*cp != *dp) { 1208 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", 1209 i, *dp, *cp); 1210 (void)printf("\ncp:"); 1211 cp = (u_char*)&icp->icmp_data[0]; 1212 for (i = 0; i < datalen; ++i, ++cp) { 1213 if ((i % 16) == 8) 1214 (void)printf("\n\t"); 1215 (void)printf("%2x ", *cp); 1216 } 1217 (void)printf("\ndp:"); 1218 cp = &outpack[ICMP_MINLEN]; 1219 for (i = 0; i < datalen; ++i, ++cp) { 1220 if ((i % 16) == 8) 1221 (void)printf("\n\t"); 1222 (void)printf("%2x ", *cp); 1223 } 1224 break; 1225 } 1226 } 1227 } 1228 } else { 1229 /* 1230 * We've got something other than an ECHOREPLY. 1231 * See if it's a reply to something that we sent. 1232 * We can compare IP destination, protocol, 1233 * and ICMP type and ID. 1234 * 1235 * Only print all the error messages if we are running 1236 * as root to avoid leaking information not normally 1237 * available to those not running as root. 1238 */ 1239 #ifndef icmp_data 1240 struct ip *oip = &icp->icmp_ip; 1241 #else 1242 struct ip *oip = (struct ip *)icp->icmp_data; 1243 #endif 1244 struct icmp *oicmp = (struct icmp *)(oip + 1); 1245 1246 if (((options & F_VERBOSE) && uid == 0) || 1247 (!(options & F_QUIET2) && 1248 (oip->ip_dst.s_addr == whereto.sin_addr.s_addr) && 1249 (oip->ip_p == IPPROTO_ICMP) && 1250 (oicmp->icmp_type == ICMP_ECHO) && 1251 (oicmp->icmp_id == ident))) { 1252 (void)printf("%d bytes from %s: ", cc, 1253 pr_addr(from->sin_addr)); 1254 pr_icmph(icp); 1255 } else 1256 return; 1257 } 1258 1259 /* Display any IP options */ 1260 cp = (u_char *)buf + sizeof(struct ip); 1261 1262 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp) 1263 switch (*cp) { 1264 case IPOPT_EOL: 1265 hlen = 0; 1266 break; 1267 case IPOPT_LSRR: 1268 case IPOPT_SSRR: 1269 (void)printf(*cp == IPOPT_LSRR ? 1270 "\nLSRR: " : "\nSSRR: "); 1271 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1; 1272 hlen -= 2; 1273 cp += 2; 1274 if (j >= INADDR_LEN && 1275 j <= hlen - (int)sizeof(struct ip)) { 1276 for (;;) { 1277 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1278 if (ina.s_addr == 0) 1279 (void)printf("\t0.0.0.0"); 1280 else 1281 (void)printf("\t%s", 1282 pr_addr(ina)); 1283 hlen -= INADDR_LEN; 1284 cp += INADDR_LEN - 1; 1285 j -= INADDR_LEN; 1286 if (j < INADDR_LEN) 1287 break; 1288 (void)putchar('\n'); 1289 } 1290 } else 1291 (void)printf("\t(truncated route)\n"); 1292 break; 1293 case IPOPT_RR: 1294 j = cp[IPOPT_OLEN]; /* get length */ 1295 i = cp[IPOPT_OFFSET]; /* and pointer */ 1296 hlen -= 2; 1297 cp += 2; 1298 if (i > j) 1299 i = j; 1300 i = i - IPOPT_MINOFF + 1; 1301 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) { 1302 old_rrlen = 0; 1303 continue; 1304 } 1305 if (i == old_rrlen 1306 && !bcmp((char *)cp, old_rr, i) 1307 && !(options & F_FLOOD)) { 1308 (void)printf("\t(same route)"); 1309 hlen -= i; 1310 cp += i; 1311 break; 1312 } 1313 old_rrlen = i; 1314 bcopy((char *)cp, old_rr, i); 1315 (void)printf("\nRR: "); 1316 if (i >= INADDR_LEN && 1317 i <= hlen - (int)sizeof(struct ip)) { 1318 for (;;) { 1319 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1320 if (ina.s_addr == 0) 1321 (void)printf("\t0.0.0.0"); 1322 else 1323 (void)printf("\t%s", 1324 pr_addr(ina)); 1325 hlen -= INADDR_LEN; 1326 cp += INADDR_LEN - 1; 1327 i -= INADDR_LEN; 1328 if (i < INADDR_LEN) 1329 break; 1330 (void)putchar('\n'); 1331 } 1332 } else 1333 (void)printf("\t(truncated route)"); 1334 break; 1335 case IPOPT_NOP: 1336 (void)printf("\nNOP"); 1337 break; 1338 default: 1339 (void)printf("\nunknown option %x", *cp); 1340 break; 1341 } 1342 if (!(options & F_FLOOD)) { 1343 (void)putchar('\n'); 1344 (void)fflush(stdout); 1345 } 1346 } 1347 1348 /* 1349 * in_cksum -- 1350 * Checksum routine for Internet Protocol family headers (C Version) 1351 */ 1352 u_short 1353 in_cksum(u_short *addr, int len) 1354 { 1355 int nleft, sum; 1356 u_short *w; 1357 union { 1358 u_short us; 1359 u_char uc[2]; 1360 } last; 1361 u_short answer; 1362 1363 nleft = len; 1364 sum = 0; 1365 w = addr; 1366 1367 /* 1368 * Our algorithm is simple, using a 32 bit accumulator (sum), we add 1369 * sequential 16 bit words to it, and at the end, fold back all the 1370 * carry bits from the top 16 bits into the lower 16 bits. 1371 */ 1372 while (nleft > 1) { 1373 sum += *w++; 1374 nleft -= 2; 1375 } 1376 1377 /* mop up an odd byte, if necessary */ 1378 if (nleft == 1) { 1379 last.uc[0] = *(u_char *)w; 1380 last.uc[1] = 0; 1381 sum += last.us; 1382 } 1383 1384 /* add back carry outs from top 16 bits to low 16 bits */ 1385 sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */ 1386 sum += (sum >> 16); /* add carry */ 1387 answer = ~sum; /* truncate to 16 bits */ 1388 return(answer); 1389 } 1390 1391 /* 1392 * tvsub -- 1393 * Subtract 2 timeval structs: out = out - in. Out is assumed to 1394 * be >= in. 1395 */ 1396 static void 1397 tvsub(struct timeval *out, const struct timeval *in) 1398 { 1399 1400 if ((out->tv_usec -= in->tv_usec) < 0) { 1401 --out->tv_sec; 1402 out->tv_usec += 1000000; 1403 } 1404 out->tv_sec -= in->tv_sec; 1405 } 1406 1407 /* 1408 * status -- 1409 * Print out statistics when SIGINFO is received. 1410 */ 1411 1412 static void 1413 status(int sig __unused) 1414 { 1415 1416 siginfo_p = 1; 1417 } 1418 1419 static void 1420 check_status(void) 1421 { 1422 1423 if (siginfo_p) { 1424 siginfo_p = 0; 1425 (void)fprintf(stderr, "\r%ld/%ld packets received (%.1f%%)", 1426 nreceived, ntransmitted, 1427 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0); 1428 if (nreceived && timing) 1429 (void)fprintf(stderr, " %.3f min / %.3f avg / %.3f max", 1430 tmin, tsum / (nreceived + nrepeats), tmax); 1431 (void)fprintf(stderr, "\n"); 1432 } 1433 } 1434 1435 /* 1436 * finish -- 1437 * Print out statistics, and give up. 1438 */ 1439 static void 1440 finish(void) 1441 { 1442 1443 (void)signal(SIGINT, SIG_IGN); 1444 (void)signal(SIGALRM, SIG_IGN); 1445 (void)putchar('\n'); 1446 (void)fflush(stdout); 1447 (void)printf("--- %s ping statistics ---\n", hostname); 1448 (void)printf("%ld packets transmitted, ", ntransmitted); 1449 (void)printf("%ld packets received, ", nreceived); 1450 if (nrepeats) 1451 (void)printf("+%ld duplicates, ", nrepeats); 1452 if (ntransmitted) { 1453 if (nreceived > ntransmitted) 1454 (void)printf("-- somebody's printing up packets!"); 1455 else 1456 (void)printf("%.1f%% packet loss", 1457 ((ntransmitted - nreceived) * 100.0) / 1458 ntransmitted); 1459 } 1460 if (nrcvtimeout) 1461 (void)printf(", %ld packets out of wait time", nrcvtimeout); 1462 (void)putchar('\n'); 1463 if (nreceived && timing) { 1464 double n = nreceived + nrepeats; 1465 double avg = tsum / n; 1466 double vari = tsumsq / n - avg * avg; 1467 (void)printf( 1468 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", 1469 tmin, avg, tmax, sqrt(vari)); 1470 } 1471 1472 if (nreceived) 1473 exit(0); 1474 else 1475 exit(2); 1476 } 1477 1478 #ifdef notdef 1479 static char *ttab[] = { 1480 "Echo Reply", /* ip + seq + udata */ 1481 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */ 1482 "Source Quench", /* IP */ 1483 "Redirect", /* redirect type, gateway, + IP */ 1484 "Echo", 1485 "Time Exceeded", /* transit, frag reassem + IP */ 1486 "Parameter Problem", /* pointer + IP */ 1487 "Timestamp", /* id + seq + three timestamps */ 1488 "Timestamp Reply", /* " */ 1489 "Info Request", /* id + sq */ 1490 "Info Reply" /* " */ 1491 }; 1492 #endif 1493 1494 /* 1495 * pr_icmph -- 1496 * Print a descriptive string about an ICMP header. 1497 */ 1498 static void 1499 pr_icmph(struct icmp *icp) 1500 { 1501 1502 switch(icp->icmp_type) { 1503 case ICMP_ECHOREPLY: 1504 (void)printf("Echo Reply\n"); 1505 /* XXX ID + Seq + Data */ 1506 break; 1507 case ICMP_UNREACH: 1508 switch(icp->icmp_code) { 1509 case ICMP_UNREACH_NET: 1510 (void)printf("Destination Net Unreachable\n"); 1511 break; 1512 case ICMP_UNREACH_HOST: 1513 (void)printf("Destination Host Unreachable\n"); 1514 break; 1515 case ICMP_UNREACH_PROTOCOL: 1516 (void)printf("Destination Protocol Unreachable\n"); 1517 break; 1518 case ICMP_UNREACH_PORT: 1519 (void)printf("Destination Port Unreachable\n"); 1520 break; 1521 case ICMP_UNREACH_NEEDFRAG: 1522 (void)printf("frag needed and DF set (MTU %d)\n", 1523 ntohs(icp->icmp_nextmtu)); 1524 break; 1525 case ICMP_UNREACH_SRCFAIL: 1526 (void)printf("Source Route Failed\n"); 1527 break; 1528 case ICMP_UNREACH_FILTER_PROHIB: 1529 (void)printf("Communication prohibited by filter\n"); 1530 break; 1531 default: 1532 (void)printf("Dest Unreachable, Bad Code: %d\n", 1533 icp->icmp_code); 1534 break; 1535 } 1536 /* Print returned IP header information */ 1537 #ifndef icmp_data 1538 pr_retip(&icp->icmp_ip); 1539 #else 1540 pr_retip((struct ip *)icp->icmp_data); 1541 #endif 1542 break; 1543 case ICMP_SOURCEQUENCH: 1544 (void)printf("Source Quench\n"); 1545 #ifndef icmp_data 1546 pr_retip(&icp->icmp_ip); 1547 #else 1548 pr_retip((struct ip *)icp->icmp_data); 1549 #endif 1550 break; 1551 case ICMP_REDIRECT: 1552 switch(icp->icmp_code) { 1553 case ICMP_REDIRECT_NET: 1554 (void)printf("Redirect Network"); 1555 break; 1556 case ICMP_REDIRECT_HOST: 1557 (void)printf("Redirect Host"); 1558 break; 1559 case ICMP_REDIRECT_TOSNET: 1560 (void)printf("Redirect Type of Service and Network"); 1561 break; 1562 case ICMP_REDIRECT_TOSHOST: 1563 (void)printf("Redirect Type of Service and Host"); 1564 break; 1565 default: 1566 (void)printf("Redirect, Bad Code: %d", icp->icmp_code); 1567 break; 1568 } 1569 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr)); 1570 #ifndef icmp_data 1571 pr_retip(&icp->icmp_ip); 1572 #else 1573 pr_retip((struct ip *)icp->icmp_data); 1574 #endif 1575 break; 1576 case ICMP_ECHO: 1577 (void)printf("Echo Request\n"); 1578 /* XXX ID + Seq + Data */ 1579 break; 1580 case ICMP_TIMXCEED: 1581 switch(icp->icmp_code) { 1582 case ICMP_TIMXCEED_INTRANS: 1583 (void)printf("Time to live exceeded\n"); 1584 break; 1585 case ICMP_TIMXCEED_REASS: 1586 (void)printf("Frag reassembly time exceeded\n"); 1587 break; 1588 default: 1589 (void)printf("Time exceeded, Bad Code: %d\n", 1590 icp->icmp_code); 1591 break; 1592 } 1593 #ifndef icmp_data 1594 pr_retip(&icp->icmp_ip); 1595 #else 1596 pr_retip((struct ip *)icp->icmp_data); 1597 #endif 1598 break; 1599 case ICMP_PARAMPROB: 1600 (void)printf("Parameter problem: pointer = 0x%02x\n", 1601 icp->icmp_hun.ih_pptr); 1602 #ifndef icmp_data 1603 pr_retip(&icp->icmp_ip); 1604 #else 1605 pr_retip((struct ip *)icp->icmp_data); 1606 #endif 1607 break; 1608 case ICMP_TSTAMP: 1609 (void)printf("Timestamp\n"); 1610 /* XXX ID + Seq + 3 timestamps */ 1611 break; 1612 case ICMP_TSTAMPREPLY: 1613 (void)printf("Timestamp Reply\n"); 1614 /* XXX ID + Seq + 3 timestamps */ 1615 break; 1616 case ICMP_IREQ: 1617 (void)printf("Information Request\n"); 1618 /* XXX ID + Seq */ 1619 break; 1620 case ICMP_IREQREPLY: 1621 (void)printf("Information Reply\n"); 1622 /* XXX ID + Seq */ 1623 break; 1624 case ICMP_MASKREQ: 1625 (void)printf("Address Mask Request\n"); 1626 break; 1627 case ICMP_MASKREPLY: 1628 (void)printf("Address Mask Reply\n"); 1629 break; 1630 case ICMP_ROUTERADVERT: 1631 (void)printf("Router Advertisement\n"); 1632 break; 1633 case ICMP_ROUTERSOLICIT: 1634 (void)printf("Router Solicitation\n"); 1635 break; 1636 default: 1637 (void)printf("Bad ICMP type: %d\n", icp->icmp_type); 1638 } 1639 } 1640 1641 /* 1642 * pr_iph -- 1643 * Print an IP header with options. 1644 */ 1645 static void 1646 pr_iph(struct ip *ip) 1647 { 1648 struct in_addr ina; 1649 u_char *cp; 1650 int hlen; 1651 1652 hlen = ip->ip_hl << 2; 1653 cp = (u_char *)ip + 20; /* point to options */ 1654 1655 (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1656 (void)printf(" %1x %1x %02x %04x %04x", 1657 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len), 1658 ntohs(ip->ip_id)); 1659 (void)printf(" %1lx %04lx", 1660 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13, 1661 (u_long) ntohl(ip->ip_off) & 0x1fff); 1662 (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, 1663 ntohs(ip->ip_sum)); 1664 memcpy(&ina, &ip->ip_src.s_addr, sizeof ina); 1665 (void)printf(" %s ", inet_ntoa(ina)); 1666 memcpy(&ina, &ip->ip_dst.s_addr, sizeof ina); 1667 (void)printf(" %s ", inet_ntoa(ina)); 1668 /* dump any option bytes */ 1669 while (hlen-- > 20) { 1670 (void)printf("%02x", *cp++); 1671 } 1672 (void)putchar('\n'); 1673 } 1674 1675 /* 1676 * pr_addr -- 1677 * Return an ascii host address as a dotted quad and optionally with 1678 * a hostname. 1679 */ 1680 static char * 1681 pr_addr(struct in_addr ina) 1682 { 1683 struct hostent *hp; 1684 static char buf[16 + 3 + MAXHOSTNAMELEN]; 1685 1686 if (options & F_NUMERIC) 1687 return inet_ntoa(ina); 1688 1689 hp = cap_gethostbyaddr(capdns, (char *)&ina, 4, AF_INET); 1690 1691 if (hp == NULL) 1692 return inet_ntoa(ina); 1693 1694 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1695 inet_ntoa(ina)); 1696 return(buf); 1697 } 1698 1699 /* 1700 * pr_retip -- 1701 * Dump some info on a returned (via ICMP) IP packet. 1702 */ 1703 static void 1704 pr_retip(struct ip *ip) 1705 { 1706 u_char *cp; 1707 int hlen; 1708 1709 pr_iph(ip); 1710 hlen = ip->ip_hl << 2; 1711 cp = (u_char *)ip + hlen; 1712 1713 if (ip->ip_p == 6) 1714 (void)printf("TCP: from port %u, to port %u (decimal)\n", 1715 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1716 else if (ip->ip_p == 17) 1717 (void)printf("UDP: from port %u, to port %u (decimal)\n", 1718 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1719 } 1720 1721 static char * 1722 pr_ntime(n_time timestamp) 1723 { 1724 static char buf[10]; 1725 int hour, min, sec; 1726 1727 sec = ntohl(timestamp) / 1000; 1728 hour = sec / 60 / 60; 1729 min = (sec % (60 * 60)) / 60; 1730 sec = (sec % (60 * 60)) % 60; 1731 1732 (void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec); 1733 1734 return (buf); 1735 } 1736 1737 static void 1738 fill(char *bp, char *patp) 1739 { 1740 char *cp; 1741 int pat[16]; 1742 u_int ii, jj, kk; 1743 1744 for (cp = patp; *cp; cp++) { 1745 if (!isxdigit(*cp)) 1746 errx(EX_USAGE, 1747 "patterns must be specified as hex digits"); 1748 1749 } 1750 ii = sscanf(patp, 1751 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1752 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 1753 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 1754 &pat[13], &pat[14], &pat[15]); 1755 1756 if (ii > 0) 1757 for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii) 1758 for (jj = 0; jj < ii; ++jj) 1759 bp[jj + kk] = pat[jj]; 1760 if (!(options & F_QUIET)) { 1761 (void)printf("PATTERN: 0x"); 1762 for (jj = 0; jj < ii; ++jj) 1763 (void)printf("%02x", bp[jj] & 0xFF); 1764 (void)printf("\n"); 1765 } 1766 } 1767 1768 static cap_channel_t * 1769 capdns_setup(void) 1770 { 1771 cap_channel_t *capcas, *capdnsloc; 1772 const char *types[2]; 1773 int families[1]; 1774 1775 capcas = cap_init(); 1776 if (capcas == NULL) 1777 err(1, "unable to create casper process"); 1778 capdnsloc = cap_service_open(capcas, "system.dns"); 1779 /* Casper capability no longer needed. */ 1780 cap_close(capcas); 1781 if (capdnsloc == NULL) 1782 err(1, "unable to open system.dns service"); 1783 types[0] = "NAME"; 1784 types[1] = "ADDR"; 1785 if (cap_dns_type_limit(capdnsloc, types, 2) < 0) 1786 err(1, "unable to limit access to system.dns service"); 1787 families[0] = AF_INET; 1788 if (cap_dns_family_limit(capdnsloc, families, 1) < 0) 1789 err(1, "unable to limit access to system.dns service"); 1790 1791 return (capdnsloc); 1792 } 1793 1794 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 1795 #define SECOPT " [-P policy]" 1796 #else 1797 #define SECOPT "" 1798 #endif 1799 static void 1800 usage(void) 1801 { 1802 1803 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 1804 "usage: ping [-AaDdfnoQqRrv] [-c count] [-G sweepmaxsize] [-g sweepminsize]", 1805 " [-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]", 1806 " " SECOPT " [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]", 1807 " [-W waittime] [-z tos] host", 1808 " ping [-AaDdfLnoQqRrv] [-c count] [-I iface] [-i wait] [-l preload]", 1809 " [-M mask | time] [-m ttl]" SECOPT " [-p pattern] [-S src_addr]", 1810 " [-s packetsize] [-T ttl] [-t timeout] [-W waittime]", 1811 " [-z tos] mcast-group"); 1812 exit(EX_USAGE); 1813 } 1814