1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Muuss. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #if 0 36 #ifndef lint 37 static const char copyright[] = 38 "@(#) Copyright (c) 1989, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93"; 44 #endif /* not lint */ 45 #endif 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 /* 50 * P I N G . C 51 * 52 * Using the Internet Control Message Protocol (ICMP) "ECHO" facility, 53 * measure round-trip-delays and packet loss across network paths. 54 * 55 * Author - 56 * Mike Muuss 57 * U. S. Army Ballistic Research Laboratory 58 * December, 1983 59 * 60 * Status - 61 * Public Domain. Distribution Unlimited. 62 * Bugs - 63 * More statistics could always be gathered. 64 * This program has to run SUID to ROOT to access the ICMP socket. 65 */ 66 67 #include <sys/param.h> /* NB: we rely on this for <sys/types.h> */ 68 #include <sys/capsicum.h> 69 #include <sys/socket.h> 70 #include <sys/sysctl.h> 71 #include <sys/time.h> 72 #include <sys/uio.h> 73 74 #include <netinet/in.h> 75 #include <netinet/in_systm.h> 76 #include <netinet/ip.h> 77 #include <netinet/ip_icmp.h> 78 #include <netinet/ip_var.h> 79 #include <arpa/inet.h> 80 81 #include <libcasper.h> 82 #include <casper/cap_dns.h> 83 84 #ifdef IPSEC 85 #include <netipsec/ipsec.h> 86 #endif /*IPSEC*/ 87 88 #include <capsicum_helpers.h> 89 #include <ctype.h> 90 #include <err.h> 91 #include <errno.h> 92 #include <math.h> 93 #include <netdb.h> 94 #include <stddef.h> 95 #include <signal.h> 96 #include <stdio.h> 97 #include <stdlib.h> 98 #include <string.h> 99 #include <sysexits.h> 100 #include <time.h> 101 #include <unistd.h> 102 103 #include "utils.h" 104 105 #define INADDR_LEN ((int)sizeof(in_addr_t)) 106 #define TIMEVAL_LEN ((int)sizeof(struct tv32)) 107 #define MASK_LEN (ICMP_MASKLEN - ICMP_MINLEN) 108 #define TS_LEN (ICMP_TSLEN - ICMP_MINLEN) 109 #define DEFDATALEN 56 /* default data length */ 110 #define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */ 111 /* runs out of buffer space */ 112 #define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN) 113 #define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN) 114 #define MAXWAIT 10000 /* max ms to wait for response */ 115 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */ 116 #define MAXTOS 255 117 118 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 119 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 120 #define SET(bit) (A(bit) |= B(bit)) 121 #define CLR(bit) (A(bit) &= (~B(bit))) 122 #define TST(bit) (A(bit) & B(bit)) 123 124 struct tv32 { 125 int32_t tv32_sec; 126 int32_t tv32_nsec; 127 }; 128 129 /* various options */ 130 static int options; 131 #define F_FLOOD 0x0001 132 #define F_INTERVAL 0x0002 133 #define F_NUMERIC 0x0004 134 #define F_PINGFILLED 0x0008 135 #define F_QUIET 0x0010 136 #define F_RROUTE 0x0020 137 #define F_SO_DEBUG 0x0040 138 #define F_SO_DONTROUTE 0x0080 139 #define F_VERBOSE 0x0100 140 #define F_QUIET2 0x0200 141 #define F_NOLOOP 0x0400 142 #define F_MTTL 0x0800 143 #define F_MIF 0x1000 144 #define F_AUDIBLE 0x2000 145 #ifdef IPSEC 146 #ifdef IPSEC_POLICY_IPSEC 147 #define F_POLICY 0x4000 148 #endif /*IPSEC_POLICY_IPSEC*/ 149 #endif /*IPSEC*/ 150 #define F_TTL 0x8000 151 #define F_MISSED 0x10000 152 #define F_ONCE 0x20000 153 #define F_HDRINCL 0x40000 154 #define F_MASK 0x80000 155 #define F_TIME 0x100000 156 #define F_SWEEP 0x200000 157 #define F_WAITTIME 0x400000 158 #define F_IP_VLAN_PCP 0x800000 159 160 /* 161 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 162 * number of received sequence numbers we can keep track of. Change 128 163 * to 8192 for complete accuracy... 164 */ 165 #define MAX_DUP_CHK (8 * 128) 166 static int mx_dup_ck = MAX_DUP_CHK; 167 static char rcvd_tbl[MAX_DUP_CHK / 8]; 168 169 static struct sockaddr_in whereto; /* who to ping */ 170 static int datalen = DEFDATALEN; 171 static int maxpayload; 172 static int ssend; /* send socket file descriptor */ 173 static int srecv; /* receive socket file descriptor */ 174 static u_char outpackhdr[IP_MAXPACKET], *outpack; 175 static char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */ 176 static char BSPACE = '\b'; /* characters written for flood */ 177 static char DOT = '.'; 178 static char *hostname; 179 static char *shostname; 180 static int ident; /* process id to identify our packets */ 181 static int uid; /* cached uid for micro-optimization */ 182 static u_char icmp_type = ICMP_ECHO; 183 static u_char icmp_type_rsp = ICMP_ECHOREPLY; 184 static int phdr_len = 0; 185 static int send_len; 186 187 /* counters */ 188 static long nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 189 static long npackets; /* max packets to transmit */ 190 static long nreceived; /* # of packets we got back */ 191 static long nrepeats; /* number of duplicates */ 192 static long ntransmitted; /* sequence # for outbound packets = #sent */ 193 static long snpackets; /* max packets to transmit in one sweep */ 194 static long sntransmitted; /* # of packets we sent in this sweep */ 195 static int sweepmax; /* max value of payload in sweep */ 196 static int sweepmin = 0; /* start value of payload in sweep */ 197 static int sweepincr = 1; /* payload increment in sweep */ 198 static int interval = 1000; /* interval between packets, ms */ 199 static int waittime = MAXWAIT; /* timeout for each packet */ 200 static long nrcvtimeout = 0; /* # of packets we got back after waittime */ 201 202 /* timing */ 203 static int timing; /* flag to do timing */ 204 static double tmin = 999999999.0; /* minimum round trip time */ 205 static double tmax = 0.0; /* maximum round trip time */ 206 static double tsum = 0.0; /* sum of all times, for doing average */ 207 static double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 208 209 /* nonzero if we've been told to finish up */ 210 static volatile sig_atomic_t finish_up; 211 static volatile sig_atomic_t siginfo_p; 212 213 static cap_channel_t *capdns; 214 215 static void fill(char *, char *); 216 static cap_channel_t *capdns_setup(void); 217 static void check_status(void); 218 static void finish(void) __dead2; 219 static void pinger(void); 220 static char *pr_addr(struct in_addr); 221 static char *pr_ntime(n_time); 222 static void pr_icmph(struct icmp *, struct ip *, const u_char *const); 223 static void pr_iph(struct ip *); 224 static void pr_pack(char *, ssize_t, struct sockaddr_in *, struct timespec *); 225 static void pr_retip(struct ip *, const u_char *); 226 static void status(int); 227 static void stopit(int); 228 static void usage(void) __dead2; 229 230 int 231 main(int argc, char *const *argv) 232 { 233 struct sockaddr_in from, sock_in; 234 struct in_addr ifaddr; 235 struct timespec last, intvl; 236 struct iovec iov; 237 struct msghdr msg; 238 struct sigaction si_sa; 239 size_t sz; 240 u_char *datap, packet[IP_MAXPACKET] __aligned(4); 241 char *ep, *source, *target, *payload; 242 struct hostent *hp; 243 #ifdef IPSEC_POLICY_IPSEC 244 char *policy_in, *policy_out; 245 #endif 246 struct sockaddr_in *to; 247 double t; 248 u_long alarmtimeout; 249 long ltmp; 250 int almost_done, ch, df, hold, i, icmp_len, mib[4], preload; 251 int ssend_errno, srecv_errno, tos, ttl, pcp; 252 char ctrl[CMSG_SPACE(sizeof(struct timespec))]; 253 char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN]; 254 #ifdef IP_OPTIONS 255 char rspace[MAX_IPOPTLEN]; /* record route space */ 256 #endif 257 unsigned char loop, mttl; 258 259 payload = source = NULL; 260 #ifdef IPSEC_POLICY_IPSEC 261 policy_in = policy_out = NULL; 262 #endif 263 cap_rights_t rights; 264 265 options |= F_NUMERIC; 266 267 /* 268 * Do the stuff that we need root priv's for *first*, and 269 * then drop our setuid bit. Save error reporting for 270 * after arg parsing. 271 * 272 * Historicaly ping was using one socket 's' for sending and for 273 * receiving. After capsicum(4) related changes we use two 274 * sockets. It was done for special ping use case - when user 275 * issue ping on multicast or broadcast address replies come 276 * from different addresses, not from the address we 277 * connect(2)'ed to, and send socket do not receive those 278 * packets. 279 */ 280 ssend = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 281 ssend_errno = errno; 282 srecv = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 283 srecv_errno = errno; 284 285 if (setuid(getuid()) != 0) 286 err(EX_NOPERM, "setuid() failed"); 287 uid = getuid(); 288 289 if (ssend < 0) { 290 errno = ssend_errno; 291 err(EX_OSERR, "ssend socket"); 292 } 293 294 if (srecv < 0) { 295 errno = srecv_errno; 296 err(EX_OSERR, "srecv socket"); 297 } 298 299 alarmtimeout = df = preload = tos = pcp = 0; 300 301 outpack = outpackhdr + sizeof(struct ip); 302 while ((ch = getopt(argc, argv, 303 "AaC:c:DdfG:g:Hh:I:i:Ll:M:m:nop:QqRrS:s:T:t:vW:z:" 304 #ifdef IPSEC 305 #ifdef IPSEC_POLICY_IPSEC 306 "P:" 307 #endif /*IPSEC_POLICY_IPSEC*/ 308 #endif /*IPSEC*/ 309 )) != -1) 310 { 311 switch(ch) { 312 case 'A': 313 options |= F_MISSED; 314 break; 315 case 'a': 316 options |= F_AUDIBLE; 317 break; 318 case 'C': 319 options |= F_IP_VLAN_PCP; 320 ltmp = strtol(optarg, &ep, 0); 321 if (*ep || ep == optarg || ltmp > 7 || ltmp < -1) 322 errx(EX_USAGE, "invalid PCP: `%s'", optarg); 323 pcp = ltmp; 324 break; 325 case 'c': 326 ltmp = strtol(optarg, &ep, 0); 327 if (*ep || ep == optarg || ltmp <= 0) 328 errx(EX_USAGE, 329 "invalid count of packets to transmit: `%s'", 330 optarg); 331 npackets = ltmp; 332 break; 333 case 'D': 334 options |= F_HDRINCL; 335 df = 1; 336 break; 337 case 'd': 338 options |= F_SO_DEBUG; 339 break; 340 case 'f': 341 if (uid) { 342 errno = EPERM; 343 err(EX_NOPERM, "-f flag"); 344 } 345 options |= F_FLOOD; 346 setbuf(stdout, (char *)NULL); 347 break; 348 case 'G': /* Maximum packet size for ping sweep */ 349 ltmp = strtol(optarg, &ep, 0); 350 if (*ep || ep == optarg || ltmp <= 0) 351 errx(EX_USAGE, "invalid packet size: `%s'", 352 optarg); 353 if (uid != 0 && ltmp > DEFDATALEN) { 354 errno = EPERM; 355 err(EX_NOPERM, 356 "packet size too large: %ld > %u", 357 ltmp, DEFDATALEN); 358 } 359 options |= F_SWEEP; 360 sweepmax = ltmp; 361 break; 362 case 'g': /* Minimum packet size for ping sweep */ 363 ltmp = strtol(optarg, &ep, 0); 364 if (*ep || ep == optarg || ltmp <= 0) 365 errx(EX_USAGE, "invalid packet size: `%s'", 366 optarg); 367 if (uid != 0 && ltmp > DEFDATALEN) { 368 errno = EPERM; 369 err(EX_NOPERM, 370 "packet size too large: %ld > %u", 371 ltmp, DEFDATALEN); 372 } 373 options |= F_SWEEP; 374 sweepmin = ltmp; 375 break; 376 case 'H': 377 options &= ~F_NUMERIC; 378 break; 379 case 'h': /* Packet size increment for ping sweep */ 380 ltmp = strtol(optarg, &ep, 0); 381 if (*ep || ep == optarg || ltmp < 1) 382 errx(EX_USAGE, "invalid increment size: `%s'", 383 optarg); 384 if (uid != 0 && ltmp > DEFDATALEN) { 385 errno = EPERM; 386 err(EX_NOPERM, 387 "packet size too large: %ld > %u", 388 ltmp, DEFDATALEN); 389 } 390 options |= F_SWEEP; 391 sweepincr = ltmp; 392 break; 393 case 'I': /* multicast interface */ 394 if (inet_aton(optarg, &ifaddr) == 0) 395 errx(EX_USAGE, 396 "invalid multicast interface: `%s'", 397 optarg); 398 options |= F_MIF; 399 break; 400 case 'i': /* wait between sending packets */ 401 t = strtod(optarg, &ep) * 1000.0; 402 if (*ep || ep == optarg || t > (double)INT_MAX) 403 errx(EX_USAGE, "invalid timing interval: `%s'", 404 optarg); 405 options |= F_INTERVAL; 406 interval = (int)t; 407 if (uid && interval < 1000) { 408 errno = EPERM; 409 err(EX_NOPERM, "-i interval too short"); 410 } 411 break; 412 case 'L': 413 options |= F_NOLOOP; 414 loop = 0; 415 break; 416 case 'l': 417 ltmp = strtol(optarg, &ep, 0); 418 if (*ep || ep == optarg || ltmp > INT_MAX || ltmp < 0) 419 errx(EX_USAGE, 420 "invalid preload value: `%s'", optarg); 421 if (uid) { 422 errno = EPERM; 423 err(EX_NOPERM, "-l flag"); 424 } 425 preload = ltmp; 426 break; 427 case 'M': 428 switch(optarg[0]) { 429 case 'M': 430 case 'm': 431 options |= F_MASK; 432 break; 433 case 'T': 434 case 't': 435 options |= F_TIME; 436 break; 437 default: 438 errx(EX_USAGE, "invalid message: `%c'", optarg[0]); 439 break; 440 } 441 break; 442 case 'm': /* TTL */ 443 ltmp = strtol(optarg, &ep, 0); 444 if (*ep || ep == optarg || ltmp > MAXTTL || ltmp < 0) 445 errx(EX_USAGE, "invalid TTL: `%s'", optarg); 446 ttl = ltmp; 447 options |= F_TTL; 448 break; 449 case 'n': 450 options |= F_NUMERIC; 451 break; 452 case 'o': 453 options |= F_ONCE; 454 break; 455 #ifdef IPSEC 456 #ifdef IPSEC_POLICY_IPSEC 457 case 'P': 458 options |= F_POLICY; 459 if (!strncmp("in", optarg, 2)) 460 policy_in = strdup(optarg); 461 else if (!strncmp("out", optarg, 3)) 462 policy_out = strdup(optarg); 463 else 464 errx(1, "invalid security policy"); 465 break; 466 #endif /*IPSEC_POLICY_IPSEC*/ 467 #endif /*IPSEC*/ 468 case 'p': /* fill buffer with user pattern */ 469 options |= F_PINGFILLED; 470 payload = optarg; 471 break; 472 case 'Q': 473 options |= F_QUIET2; 474 break; 475 case 'q': 476 options |= F_QUIET; 477 break; 478 case 'R': 479 options |= F_RROUTE; 480 break; 481 case 'r': 482 options |= F_SO_DONTROUTE; 483 break; 484 case 'S': 485 source = optarg; 486 break; 487 case 's': /* size of packet to send */ 488 ltmp = strtol(optarg, &ep, 0); 489 if (*ep || ep == optarg || ltmp > INT_MAX || ltmp < 0) 490 errx(EX_USAGE, "invalid packet size: `%s'", 491 optarg); 492 if (uid != 0 && ltmp > DEFDATALEN) { 493 errno = EPERM; 494 err(EX_NOPERM, 495 "packet size too large: %ld > %u", 496 ltmp, DEFDATALEN); 497 } 498 datalen = ltmp; 499 break; 500 case 'T': /* multicast TTL */ 501 ltmp = strtol(optarg, &ep, 0); 502 if (*ep || ep == optarg || ltmp > MAXTTL || ltmp < 0) 503 errx(EX_USAGE, "invalid multicast TTL: `%s'", 504 optarg); 505 mttl = ltmp; 506 options |= F_MTTL; 507 break; 508 case 't': 509 alarmtimeout = strtoul(optarg, &ep, 0); 510 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 511 errx(EX_USAGE, "invalid timeout: `%s'", 512 optarg); 513 if (alarmtimeout > MAXALARM) 514 errx(EX_USAGE, "invalid timeout: `%s' > %d", 515 optarg, MAXALARM); 516 { 517 struct itimerval itv; 518 519 timerclear(&itv.it_interval); 520 timerclear(&itv.it_value); 521 itv.it_value.tv_sec = (time_t)alarmtimeout; 522 if (setitimer(ITIMER_REAL, &itv, NULL) != 0) 523 err(1, "setitimer"); 524 } 525 break; 526 case 'v': 527 options |= F_VERBOSE; 528 break; 529 case 'W': /* wait ms for answer */ 530 t = strtod(optarg, &ep); 531 if (*ep || ep == optarg || t > (double)INT_MAX) 532 errx(EX_USAGE, "invalid timing interval: `%s'", 533 optarg); 534 options |= F_WAITTIME; 535 waittime = (int)t; 536 break; 537 case 'z': 538 options |= F_HDRINCL; 539 ltmp = strtol(optarg, &ep, 0); 540 if (*ep || ep == optarg || ltmp > MAXTOS || ltmp < 0) 541 errx(EX_USAGE, "invalid TOS: `%s'", optarg); 542 tos = ltmp; 543 break; 544 default: 545 usage(); 546 } 547 } 548 549 if (argc - optind != 1) 550 usage(); 551 target = argv[optind]; 552 553 switch (options & (F_MASK|F_TIME)) { 554 case 0: break; 555 case F_MASK: 556 icmp_type = ICMP_MASKREQ; 557 icmp_type_rsp = ICMP_MASKREPLY; 558 phdr_len = MASK_LEN; 559 if (!(options & F_QUIET)) 560 (void)printf("ICMP_MASKREQ\n"); 561 break; 562 case F_TIME: 563 icmp_type = ICMP_TSTAMP; 564 icmp_type_rsp = ICMP_TSTAMPREPLY; 565 phdr_len = TS_LEN; 566 if (!(options & F_QUIET)) 567 (void)printf("ICMP_TSTAMP\n"); 568 break; 569 default: 570 errx(EX_USAGE, "ICMP_TSTAMP and ICMP_MASKREQ are exclusive."); 571 break; 572 } 573 icmp_len = sizeof(struct ip) + ICMP_MINLEN + phdr_len; 574 if (options & F_RROUTE) 575 icmp_len += MAX_IPOPTLEN; 576 maxpayload = IP_MAXPACKET - icmp_len; 577 if (datalen > maxpayload) 578 errx(EX_USAGE, "packet size too large: %d > %d", datalen, 579 maxpayload); 580 send_len = icmp_len + datalen; 581 datap = &outpack[ICMP_MINLEN + phdr_len + TIMEVAL_LEN]; 582 if (options & F_PINGFILLED) { 583 fill((char *)datap, payload); 584 } 585 capdns = capdns_setup(); 586 if (source) { 587 bzero((char *)&sock_in, sizeof(sock_in)); 588 sock_in.sin_family = AF_INET; 589 if (inet_aton(source, &sock_in.sin_addr) != 0) { 590 shostname = source; 591 } else { 592 hp = cap_gethostbyname2(capdns, source, AF_INET); 593 if (!hp) 594 errx(EX_NOHOST, "cannot resolve %s: %s", 595 source, hstrerror(h_errno)); 596 597 sock_in.sin_len = sizeof sock_in; 598 if ((unsigned)hp->h_length > sizeof(sock_in.sin_addr) || 599 hp->h_length < 0) 600 errx(1, "gethostbyname2: illegal address"); 601 memcpy(&sock_in.sin_addr, hp->h_addr_list[0], 602 sizeof(sock_in.sin_addr)); 603 (void)strncpy(snamebuf, hp->h_name, 604 sizeof(snamebuf) - 1); 605 snamebuf[sizeof(snamebuf) - 1] = '\0'; 606 shostname = snamebuf; 607 } 608 if (bind(ssend, (struct sockaddr *)&sock_in, sizeof sock_in) == 609 -1) 610 err(1, "bind"); 611 } 612 613 bzero(&whereto, sizeof(whereto)); 614 to = &whereto; 615 to->sin_family = AF_INET; 616 to->sin_len = sizeof *to; 617 if (inet_aton(target, &to->sin_addr) != 0) { 618 hostname = target; 619 } else { 620 hp = cap_gethostbyname2(capdns, target, AF_INET); 621 if (!hp) 622 errx(EX_NOHOST, "cannot resolve %s: %s", 623 target, hstrerror(h_errno)); 624 625 if ((unsigned)hp->h_length > sizeof(to->sin_addr)) 626 errx(1, "gethostbyname2 returned an illegal address"); 627 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr); 628 (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1); 629 hnamebuf[sizeof(hnamebuf) - 1] = '\0'; 630 hostname = hnamebuf; 631 } 632 633 /* From now on we will use only reverse DNS lookups. */ 634 #ifdef WITH_CASPER 635 if (capdns != NULL) { 636 const char *types[1]; 637 638 types[0] = "ADDR2NAME"; 639 if (cap_dns_type_limit(capdns, types, 1) < 0) 640 err(1, "unable to limit access to system.dns service"); 641 } 642 #endif 643 if (connect(ssend, (struct sockaddr *)&whereto, sizeof(whereto)) != 0) 644 err(1, "connect"); 645 646 if (options & F_FLOOD && options & F_INTERVAL) 647 errx(EX_USAGE, "-f and -i: incompatible options"); 648 649 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 650 errx(EX_USAGE, 651 "-f flag cannot be used with multicast destination"); 652 if (options & (F_MIF | F_NOLOOP | F_MTTL) 653 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 654 errx(EX_USAGE, 655 "-I, -L, -T flags cannot be used with unicast destination"); 656 657 if (datalen >= TIMEVAL_LEN) /* can we time transfer */ 658 timing = 1; 659 660 if (!(options & F_PINGFILLED)) 661 for (i = TIMEVAL_LEN; i < datalen; ++i) 662 *datap++ = i; 663 664 ident = getpid() & 0xFFFF; 665 666 hold = 1; 667 if (options & F_SO_DEBUG) { 668 (void)setsockopt(ssend, SOL_SOCKET, SO_DEBUG, (char *)&hold, 669 sizeof(hold)); 670 (void)setsockopt(srecv, SOL_SOCKET, SO_DEBUG, (char *)&hold, 671 sizeof(hold)); 672 } 673 if (options & F_SO_DONTROUTE) 674 (void)setsockopt(ssend, SOL_SOCKET, SO_DONTROUTE, (char *)&hold, 675 sizeof(hold)); 676 if (options & F_IP_VLAN_PCP) { 677 (void)setsockopt(ssend, IPPROTO_IP, IP_VLAN_PCP, (char *)&pcp, 678 sizeof(pcp)); 679 } 680 #ifdef IPSEC 681 #ifdef IPSEC_POLICY_IPSEC 682 if (options & F_POLICY) { 683 char *buf; 684 if (policy_in != NULL) { 685 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 686 if (buf == NULL) 687 errx(EX_CONFIG, "%s", ipsec_strerror()); 688 if (setsockopt(srecv, IPPROTO_IP, IP_IPSEC_POLICY, 689 buf, ipsec_get_policylen(buf)) < 0) 690 err(EX_CONFIG, 691 "ipsec policy cannot be configured"); 692 free(buf); 693 } 694 695 if (policy_out != NULL) { 696 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 697 if (buf == NULL) 698 errx(EX_CONFIG, "%s", ipsec_strerror()); 699 if (setsockopt(ssend, IPPROTO_IP, IP_IPSEC_POLICY, 700 buf, ipsec_get_policylen(buf)) < 0) 701 err(EX_CONFIG, 702 "ipsec policy cannot be configured"); 703 free(buf); 704 } 705 } 706 #endif /*IPSEC_POLICY_IPSEC*/ 707 #endif /*IPSEC*/ 708 709 if (options & F_HDRINCL) { 710 struct ip ip; 711 712 memcpy(&ip, outpackhdr, sizeof(ip)); 713 if (!(options & (F_TTL | F_MTTL))) { 714 mib[0] = CTL_NET; 715 mib[1] = PF_INET; 716 mib[2] = IPPROTO_IP; 717 mib[3] = IPCTL_DEFTTL; 718 sz = sizeof(ttl); 719 if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1) 720 err(1, "sysctl(net.inet.ip.ttl)"); 721 } 722 setsockopt(ssend, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold)); 723 ip.ip_v = IPVERSION; 724 ip.ip_hl = sizeof(struct ip) >> 2; 725 ip.ip_tos = tos; 726 ip.ip_id = 0; 727 ip.ip_off = htons(df ? IP_DF : 0); 728 ip.ip_ttl = ttl; 729 ip.ip_p = IPPROTO_ICMP; 730 ip.ip_src.s_addr = source ? sock_in.sin_addr.s_addr : INADDR_ANY; 731 ip.ip_dst = to->sin_addr; 732 memcpy(outpackhdr, &ip, sizeof(ip)); 733 } 734 735 /* 736 * Here we enter capability mode. Further down access to global 737 * namespaces (e.g filesystem) is restricted (see capsicum(4)). 738 * We must connect(2) our socket before this point. 739 */ 740 caph_cache_catpages(); 741 if (caph_enter_casper() < 0) 742 err(1, "caph_enter_casper"); 743 744 cap_rights_init(&rights, CAP_RECV, CAP_EVENT, CAP_SETSOCKOPT); 745 if (caph_rights_limit(srecv, &rights) < 0) 746 err(1, "cap_rights_limit srecv"); 747 cap_rights_init(&rights, CAP_SEND, CAP_SETSOCKOPT); 748 if (caph_rights_limit(ssend, &rights) < 0) 749 err(1, "cap_rights_limit ssend"); 750 751 /* record route option */ 752 if (options & F_RROUTE) { 753 #ifdef IP_OPTIONS 754 bzero(rspace, sizeof(rspace)); 755 rspace[IPOPT_OPTVAL] = IPOPT_RR; 756 rspace[IPOPT_OLEN] = sizeof(rspace) - 1; 757 rspace[IPOPT_OFFSET] = IPOPT_MINOFF; 758 rspace[sizeof(rspace) - 1] = IPOPT_EOL; 759 if (setsockopt(ssend, IPPROTO_IP, IP_OPTIONS, rspace, 760 sizeof(rspace)) < 0) 761 err(EX_OSERR, "setsockopt IP_OPTIONS"); 762 #else 763 errx(EX_UNAVAILABLE, 764 "record route not available in this implementation"); 765 #endif /* IP_OPTIONS */ 766 } 767 768 if (options & F_TTL) { 769 if (setsockopt(ssend, IPPROTO_IP, IP_TTL, &ttl, 770 sizeof(ttl)) < 0) { 771 err(EX_OSERR, "setsockopt IP_TTL"); 772 } 773 } 774 if (options & F_NOLOOP) { 775 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, 776 sizeof(loop)) < 0) { 777 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP"); 778 } 779 } 780 if (options & F_MTTL) { 781 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_TTL, &mttl, 782 sizeof(mttl)) < 0) { 783 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL"); 784 } 785 } 786 if (options & F_MIF) { 787 if (setsockopt(ssend, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr, 788 sizeof(ifaddr)) < 0) { 789 err(EX_OSERR, "setsockopt IP_MULTICAST_IF"); 790 } 791 } 792 #ifdef SO_TIMESTAMP 793 { 794 int on = 1; 795 int ts_clock = SO_TS_MONOTONIC; 796 if (setsockopt(srecv, SOL_SOCKET, SO_TIMESTAMP, &on, 797 sizeof(on)) < 0) 798 err(EX_OSERR, "setsockopt SO_TIMESTAMP"); 799 if (setsockopt(srecv, SOL_SOCKET, SO_TS_CLOCK, &ts_clock, 800 sizeof(ts_clock)) < 0) 801 err(EX_OSERR, "setsockopt SO_TS_CLOCK"); 802 } 803 #endif 804 if (sweepmax) { 805 if (sweepmin > sweepmax) 806 errx(EX_USAGE, "Maximum packet size must be no less than the minimum packet size"); 807 808 if (datalen != DEFDATALEN) 809 errx(EX_USAGE, "Packet size and ping sweep are mutually exclusive"); 810 811 if (npackets > 0) { 812 snpackets = npackets; 813 npackets = 0; 814 } else 815 snpackets = 1; 816 datalen = sweepmin; 817 send_len = icmp_len + sweepmin; 818 } 819 if (options & F_SWEEP && !sweepmax) 820 errx(EX_USAGE, "Maximum sweep size must be specified"); 821 822 /* 823 * When pinging the broadcast address, you can get a lot of answers. 824 * Doing something so evil is useful if you are trying to stress the 825 * ethernet, or just want to fill the arp cache to get some stuff for 826 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast 827 * or multicast pings if they wish. 828 */ 829 830 /* 831 * XXX receive buffer needs undetermined space for mbuf overhead 832 * as well. 833 */ 834 hold = IP_MAXPACKET + 128; 835 (void)setsockopt(srecv, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 836 sizeof(hold)); 837 /* CAP_SETSOCKOPT removed */ 838 cap_rights_init(&rights, CAP_RECV, CAP_EVENT); 839 if (caph_rights_limit(srecv, &rights) < 0) 840 err(1, "cap_rights_limit srecv setsockopt"); 841 if (uid == 0) 842 (void)setsockopt(ssend, SOL_SOCKET, SO_SNDBUF, (char *)&hold, 843 sizeof(hold)); 844 /* CAP_SETSOCKOPT removed */ 845 cap_rights_init(&rights, CAP_SEND); 846 if (caph_rights_limit(ssend, &rights) < 0) 847 err(1, "cap_rights_limit ssend setsockopt"); 848 849 if (to->sin_family == AF_INET) { 850 (void)printf("PING %s (%s)", hostname, 851 inet_ntoa(to->sin_addr)); 852 if (source) 853 (void)printf(" from %s", shostname); 854 if (sweepmax) 855 (void)printf(": (%d ... %d) data bytes\n", 856 sweepmin, sweepmax); 857 else 858 (void)printf(": %d data bytes\n", datalen); 859 860 } else { 861 if (sweepmax) 862 (void)printf("PING %s: (%d ... %d) data bytes\n", 863 hostname, sweepmin, sweepmax); 864 else 865 (void)printf("PING %s: %d data bytes\n", hostname, datalen); 866 } 867 868 /* 869 * Use sigaction() instead of signal() to get unambiguous semantics, 870 * in particular with SA_RESTART not set. 871 */ 872 873 sigemptyset(&si_sa.sa_mask); 874 si_sa.sa_flags = 0; 875 876 si_sa.sa_handler = stopit; 877 if (sigaction(SIGINT, &si_sa, 0) == -1) { 878 err(EX_OSERR, "sigaction SIGINT"); 879 } 880 881 si_sa.sa_handler = status; 882 if (sigaction(SIGINFO, &si_sa, 0) == -1) { 883 err(EX_OSERR, "sigaction"); 884 } 885 886 if (alarmtimeout > 0) { 887 si_sa.sa_handler = stopit; 888 if (sigaction(SIGALRM, &si_sa, 0) == -1) 889 err(EX_OSERR, "sigaction SIGALRM"); 890 } 891 892 bzero(&msg, sizeof(msg)); 893 msg.msg_name = (caddr_t)&from; 894 msg.msg_iov = &iov; 895 msg.msg_iovlen = 1; 896 #ifdef SO_TIMESTAMP 897 msg.msg_control = (caddr_t)ctrl; 898 msg.msg_controllen = sizeof(ctrl); 899 #endif 900 iov.iov_base = packet; 901 iov.iov_len = IP_MAXPACKET; 902 903 if (preload == 0) 904 pinger(); /* send the first ping */ 905 else { 906 if (npackets != 0 && preload > npackets) 907 preload = npackets; 908 while (preload--) /* fire off them quickies */ 909 pinger(); 910 } 911 (void)clock_gettime(CLOCK_MONOTONIC, &last); 912 913 if (options & F_FLOOD) { 914 intvl.tv_sec = 0; 915 intvl.tv_nsec = 10000000; 916 } else { 917 intvl.tv_sec = interval / 1000; 918 intvl.tv_nsec = interval % 1000 * 1000000; 919 } 920 921 almost_done = 0; 922 while (!finish_up) { 923 struct timespec now, timeout; 924 fd_set rfds; 925 int n; 926 ssize_t cc; 927 928 check_status(); 929 if ((unsigned)srecv >= FD_SETSIZE) 930 errx(EX_OSERR, "descriptor too large"); 931 FD_ZERO(&rfds); 932 FD_SET(srecv, &rfds); 933 (void)clock_gettime(CLOCK_MONOTONIC, &now); 934 timespecadd(&last, &intvl, &timeout); 935 timespecsub(&timeout, &now, &timeout); 936 if (timeout.tv_sec < 0) 937 timespecclear(&timeout); 938 n = pselect(srecv + 1, &rfds, NULL, NULL, &timeout, NULL); 939 if (n < 0) 940 continue; /* Must be EINTR. */ 941 if (n == 1) { 942 struct timespec *tv = NULL; 943 #ifdef SO_TIMESTAMP 944 struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg); 945 #endif 946 msg.msg_namelen = sizeof(from); 947 if ((cc = recvmsg(srecv, &msg, 0)) < 0) { 948 if (errno == EINTR) 949 continue; 950 warn("recvmsg"); 951 continue; 952 } 953 #ifdef SO_TIMESTAMP 954 if (cmsg != NULL && 955 cmsg->cmsg_level == SOL_SOCKET && 956 cmsg->cmsg_type == SCM_TIMESTAMP && 957 cmsg->cmsg_len == CMSG_LEN(sizeof *tv)) { 958 /* Copy to avoid alignment problems: */ 959 memcpy(&now, CMSG_DATA(cmsg), sizeof(now)); 960 tv = &now; 961 } 962 #endif 963 if (tv == NULL) { 964 (void)clock_gettime(CLOCK_MONOTONIC, &now); 965 tv = &now; 966 } 967 pr_pack((char *)packet, cc, &from, tv); 968 if ((options & F_ONCE && nreceived) || 969 (npackets && nreceived >= npackets)) 970 break; 971 } 972 if (n == 0 || options & F_FLOOD) { 973 if (sweepmax && sntransmitted == snpackets) { 974 for (i = 0; i < sweepincr ; ++i) 975 *datap++ = i; 976 datalen += sweepincr; 977 if (datalen > sweepmax) 978 break; 979 send_len = icmp_len + datalen; 980 sntransmitted = 0; 981 } 982 if (!npackets || ntransmitted < npackets) 983 pinger(); 984 else { 985 if (almost_done) 986 break; 987 almost_done = 1; 988 intvl.tv_nsec = 0; 989 if (nreceived) { 990 intvl.tv_sec = 2 * tmax / 1000; 991 if (!intvl.tv_sec) 992 intvl.tv_sec = 1; 993 } else { 994 intvl.tv_sec = waittime / 1000; 995 intvl.tv_nsec = waittime % 1000 * 1000000; 996 } 997 } 998 (void)clock_gettime(CLOCK_MONOTONIC, &last); 999 if (ntransmitted - nreceived - 1 > nmissedmax) { 1000 nmissedmax = ntransmitted - nreceived - 1; 1001 if (options & F_MISSED) 1002 (void)write(STDOUT_FILENO, &BBELL, 1); 1003 } 1004 } 1005 } 1006 finish(); 1007 /* NOTREACHED */ 1008 exit(0); /* Make the compiler happy */ 1009 } 1010 1011 /* 1012 * stopit -- 1013 * Set the global bit that causes the main loop to quit. 1014 * Do NOT call finish() from here, since finish() does far too much 1015 * to be called from a signal handler. 1016 */ 1017 void 1018 stopit(int sig __unused) 1019 { 1020 1021 /* 1022 * When doing reverse DNS lookups, the finish_up flag might not 1023 * be noticed for a while. Just exit if we get a second SIGINT. 1024 */ 1025 if (!(options & F_NUMERIC) && finish_up) 1026 _exit(nreceived ? 0 : 2); 1027 finish_up = 1; 1028 } 1029 1030 /* 1031 * pinger -- 1032 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 1033 * will be added on by the kernel. The ID field is our UNIX process ID, 1034 * and the sequence number is an ascending integer. The first TIMEVAL_LEN 1035 * bytes of the data portion are used to hold a UNIX "timespec" struct in 1036 * host byte-order, to compute the round-trip time. 1037 */ 1038 static void 1039 pinger(void) 1040 { 1041 struct timespec now; 1042 struct tv32 tv32; 1043 struct icmp icp; 1044 int cc, i; 1045 u_char *packet; 1046 1047 packet = outpack; 1048 memcpy(&icp, outpack, ICMP_MINLEN + phdr_len); 1049 icp.icmp_type = icmp_type; 1050 icp.icmp_code = 0; 1051 icp.icmp_cksum = 0; 1052 icp.icmp_seq = htons(ntransmitted); 1053 icp.icmp_id = ident; /* ID */ 1054 1055 CLR(ntransmitted % mx_dup_ck); 1056 1057 if ((options & F_TIME) || timing) { 1058 (void)clock_gettime(CLOCK_MONOTONIC, &now); 1059 /* 1060 * Truncate seconds down to 32 bits in order 1061 * to fit the timestamp within 8 bytes of the 1062 * packet. We're only concerned with 1063 * durations, not absolute times. 1064 */ 1065 tv32.tv32_sec = (uint32_t)htonl(now.tv_sec); 1066 tv32.tv32_nsec = (uint32_t)htonl(now.tv_nsec); 1067 if (options & F_TIME) 1068 icp.icmp_otime = htonl((now.tv_sec % (24*60*60)) 1069 * 1000 + now.tv_nsec / 1000000); 1070 if (timing) 1071 bcopy((void *)&tv32, 1072 (void *)&outpack[ICMP_MINLEN + phdr_len], 1073 sizeof(tv32)); 1074 } 1075 1076 memcpy(outpack, &icp, ICMP_MINLEN + phdr_len); 1077 1078 cc = ICMP_MINLEN + phdr_len + datalen; 1079 1080 /* compute ICMP checksum here */ 1081 icp.icmp_cksum = in_cksum(outpack, cc); 1082 /* Update icmp_cksum in the raw packet data buffer. */ 1083 memcpy(outpack + offsetof(struct icmp, icmp_cksum), &icp.icmp_cksum, 1084 sizeof(icp.icmp_cksum)); 1085 1086 if (options & F_HDRINCL) { 1087 struct ip ip; 1088 1089 cc += sizeof(struct ip); 1090 ip.ip_len = htons(cc); 1091 /* Update ip_len in the raw packet data buffer. */ 1092 memcpy(outpackhdr + offsetof(struct ip, ip_len), &ip.ip_len, 1093 sizeof(ip.ip_len)); 1094 ip.ip_sum = in_cksum(outpackhdr, cc); 1095 /* Update ip_sum in the raw packet data buffer. */ 1096 memcpy(outpackhdr + offsetof(struct ip, ip_sum), &ip.ip_sum, 1097 sizeof(ip.ip_sum)); 1098 packet = outpackhdr; 1099 } 1100 i = send(ssend, (char *)packet, cc, 0); 1101 if (i < 0 || i != cc) { 1102 if (i < 0) { 1103 if (options & F_FLOOD && errno == ENOBUFS) { 1104 usleep(FLOOD_BACKOFF); 1105 return; 1106 } 1107 warn("sendto"); 1108 } else { 1109 warn("%s: partial write: %d of %d bytes", 1110 hostname, i, cc); 1111 } 1112 } 1113 ntransmitted++; 1114 sntransmitted++; 1115 if (!(options & F_QUIET) && options & F_FLOOD) 1116 (void)write(STDOUT_FILENO, &DOT, 1); 1117 } 1118 1119 /* 1120 * pr_pack -- 1121 * Print out the packet, if it came from us. This logic is necessary 1122 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1123 * which arrive ('tis only fair). This permits multiple copies of this 1124 * program to be run without having intermingled output (or statistics!). 1125 */ 1126 static void 1127 pr_pack(char *buf, ssize_t cc, struct sockaddr_in *from, struct timespec *tv) 1128 { 1129 struct in_addr ina; 1130 u_char *cp, *dp, l; 1131 struct icmp icp; 1132 struct ip ip; 1133 const u_char *icmp_data_raw; 1134 double triptime; 1135 int dupflag, hlen, i, j, recv_len; 1136 uint16_t seq; 1137 static int old_rrlen; 1138 static char old_rr[MAX_IPOPTLEN]; 1139 struct ip oip; 1140 u_char oip_header_len; 1141 struct icmp oicmp; 1142 const u_char *oicmp_raw; 1143 1144 /* 1145 * Get size of IP header of the received packet. The 1146 * information is contained in the lower four bits of the 1147 * first byte. 1148 */ 1149 memcpy(&l, buf, sizeof(l)); 1150 hlen = (l & 0x0f) << 2; 1151 memcpy(&ip, buf, hlen); 1152 1153 /* Check the IP header */ 1154 recv_len = cc; 1155 if (cc < hlen + ICMP_MINLEN) { 1156 if (options & F_VERBOSE) 1157 warn("packet too short (%zd bytes) from %s", cc, 1158 inet_ntoa(from->sin_addr)); 1159 return; 1160 } 1161 1162 #ifndef icmp_data 1163 icmp_data_raw = buf + hlen + offsetof(struct icmp, icmp_ip); 1164 #else 1165 icmp_data_raw = buf + hlen + offsetof(struct icmp, icmp_data); 1166 #endif 1167 1168 /* Now the ICMP part */ 1169 cc -= hlen; 1170 memcpy(&icp, buf + hlen, MIN((ssize_t)sizeof(icp), cc)); 1171 if (icp.icmp_type == icmp_type_rsp) { 1172 if (icp.icmp_id != ident) 1173 return; /* 'Twas not our ECHO */ 1174 ++nreceived; 1175 triptime = 0.0; 1176 if (timing) { 1177 struct timespec tv1; 1178 struct tv32 tv32; 1179 const u_char *tp; 1180 1181 tp = icmp_data_raw + phdr_len; 1182 1183 if ((size_t)(cc - ICMP_MINLEN - phdr_len) >= 1184 sizeof(tv1)) { 1185 /* Copy to avoid alignment problems: */ 1186 memcpy(&tv32, tp, sizeof(tv32)); 1187 tv1.tv_sec = ntohl(tv32.tv32_sec); 1188 tv1.tv_nsec = ntohl(tv32.tv32_nsec); 1189 timespecsub(tv, &tv1, tv); 1190 triptime = ((double)tv->tv_sec) * 1000.0 + 1191 ((double)tv->tv_nsec) / 1000000.0; 1192 tsum += triptime; 1193 tsumsq += triptime * triptime; 1194 if (triptime < tmin) 1195 tmin = triptime; 1196 if (triptime > tmax) 1197 tmax = triptime; 1198 } else 1199 timing = 0; 1200 } 1201 1202 seq = ntohs(icp.icmp_seq); 1203 1204 if (TST(seq % mx_dup_ck)) { 1205 ++nrepeats; 1206 --nreceived; 1207 dupflag = 1; 1208 } else { 1209 SET(seq % mx_dup_ck); 1210 dupflag = 0; 1211 } 1212 1213 if (options & F_QUIET) 1214 return; 1215 1216 if (options & F_WAITTIME && triptime > waittime) { 1217 ++nrcvtimeout; 1218 return; 1219 } 1220 1221 if (options & F_FLOOD) 1222 (void)write(STDOUT_FILENO, &BSPACE, 1); 1223 else { 1224 (void)printf("%zd bytes from %s: icmp_seq=%u", cc, 1225 pr_addr(from->sin_addr), seq); 1226 (void)printf(" ttl=%d", ip.ip_ttl); 1227 if (timing) 1228 (void)printf(" time=%.3f ms", triptime); 1229 if (dupflag) 1230 (void)printf(" (DUP!)"); 1231 if (options & F_AUDIBLE) 1232 (void)write(STDOUT_FILENO, &BBELL, 1); 1233 if (options & F_MASK) { 1234 /* Just prentend this cast isn't ugly */ 1235 (void)printf(" mask=%s", 1236 inet_ntoa(*(struct in_addr *)&(icp.icmp_mask))); 1237 } 1238 if (options & F_TIME) { 1239 (void)printf(" tso=%s", pr_ntime(icp.icmp_otime)); 1240 (void)printf(" tsr=%s", pr_ntime(icp.icmp_rtime)); 1241 (void)printf(" tst=%s", pr_ntime(icp.icmp_ttime)); 1242 } 1243 if (recv_len != send_len) { 1244 (void)printf( 1245 "\nwrong total length %d instead of %d", 1246 recv_len, send_len); 1247 } 1248 /* check the data */ 1249 cp = (u_char*)(buf + hlen + offsetof(struct icmp, 1250 icmp_data) + phdr_len); 1251 dp = &outpack[ICMP_MINLEN + phdr_len]; 1252 cc -= ICMP_MINLEN + phdr_len; 1253 i = 0; 1254 if (timing) { /* don't check variable timestamp */ 1255 cp += TIMEVAL_LEN; 1256 dp += TIMEVAL_LEN; 1257 cc -= TIMEVAL_LEN; 1258 i += TIMEVAL_LEN; 1259 } 1260 for (; i < datalen && cc > 0; ++i, ++cp, ++dp, --cc) { 1261 if (*cp != *dp) { 1262 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", 1263 i, *dp, *cp); 1264 (void)printf("\ncp:"); 1265 cp = (u_char*)(buf + hlen + 1266 offsetof(struct icmp, icmp_data)); 1267 for (i = 0; i < datalen; ++i, ++cp) { 1268 if ((i % 16) == 8) 1269 (void)printf("\n\t"); 1270 (void)printf("%2x ", *cp); 1271 } 1272 (void)printf("\ndp:"); 1273 cp = &outpack[ICMP_MINLEN]; 1274 for (i = 0; i < datalen; ++i, ++cp) { 1275 if ((i % 16) == 8) 1276 (void)printf("\n\t"); 1277 (void)printf("%2x ", *cp); 1278 } 1279 break; 1280 } 1281 } 1282 } 1283 } else { 1284 /* 1285 * We've got something other than an ECHOREPLY. 1286 * See if it's a reply to something that we sent. 1287 * We can compare IP destination, protocol, 1288 * and ICMP type and ID. 1289 * 1290 * Only print all the error messages if we are running 1291 * as root to avoid leaking information not normally 1292 * available to those not running as root. 1293 */ 1294 memcpy(&oip_header_len, icmp_data_raw, sizeof(oip_header_len)); 1295 oip_header_len = (oip_header_len & 0x0f) << 2; 1296 memcpy(&oip, icmp_data_raw, oip_header_len); 1297 oicmp_raw = icmp_data_raw + oip_header_len; 1298 memcpy(&oicmp, oicmp_raw, offsetof(struct icmp, icmp_id) + 1299 sizeof(oicmp.icmp_id)); 1300 1301 if (((options & F_VERBOSE) && uid == 0) || 1302 (!(options & F_QUIET2) && 1303 (oip.ip_dst.s_addr == whereto.sin_addr.s_addr) && 1304 (oip.ip_p == IPPROTO_ICMP) && 1305 (oicmp.icmp_type == ICMP_ECHO) && 1306 (oicmp.icmp_id == ident))) { 1307 (void)printf("%zd bytes from %s: ", cc, 1308 pr_addr(from->sin_addr)); 1309 pr_icmph(&icp, &oip, oicmp_raw); 1310 } else 1311 return; 1312 } 1313 1314 /* Display any IP options */ 1315 cp = (u_char *)buf + sizeof(struct ip); 1316 1317 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp) 1318 switch (*cp) { 1319 case IPOPT_EOL: 1320 hlen = 0; 1321 break; 1322 case IPOPT_LSRR: 1323 case IPOPT_SSRR: 1324 (void)printf(*cp == IPOPT_LSRR ? 1325 "\nLSRR: " : "\nSSRR: "); 1326 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1; 1327 hlen -= 2; 1328 cp += 2; 1329 if (j >= INADDR_LEN && 1330 j <= hlen - (int)sizeof(struct ip)) { 1331 for (;;) { 1332 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1333 if (ina.s_addr == 0) 1334 (void)printf("\t0.0.0.0"); 1335 else 1336 (void)printf("\t%s", 1337 pr_addr(ina)); 1338 hlen -= INADDR_LEN; 1339 cp += INADDR_LEN - 1; 1340 j -= INADDR_LEN; 1341 if (j < INADDR_LEN) 1342 break; 1343 (void)putchar('\n'); 1344 } 1345 } else 1346 (void)printf("\t(truncated route)\n"); 1347 break; 1348 case IPOPT_RR: 1349 j = cp[IPOPT_OLEN]; /* get length */ 1350 i = cp[IPOPT_OFFSET]; /* and pointer */ 1351 hlen -= 2; 1352 cp += 2; 1353 if (i > j) 1354 i = j; 1355 i = i - IPOPT_MINOFF + 1; 1356 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) { 1357 old_rrlen = 0; 1358 continue; 1359 } 1360 if (i == old_rrlen 1361 && !bcmp((char *)cp, old_rr, i) 1362 && !(options & F_FLOOD)) { 1363 (void)printf("\t(same route)"); 1364 hlen -= i; 1365 cp += i; 1366 break; 1367 } 1368 old_rrlen = i; 1369 bcopy((char *)cp, old_rr, i); 1370 (void)printf("\nRR: "); 1371 if (i >= INADDR_LEN && 1372 i <= hlen - (int)sizeof(struct ip)) { 1373 for (;;) { 1374 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1375 if (ina.s_addr == 0) 1376 (void)printf("\t0.0.0.0"); 1377 else 1378 (void)printf("\t%s", 1379 pr_addr(ina)); 1380 hlen -= INADDR_LEN; 1381 cp += INADDR_LEN - 1; 1382 i -= INADDR_LEN; 1383 if (i < INADDR_LEN) 1384 break; 1385 (void)putchar('\n'); 1386 } 1387 } else 1388 (void)printf("\t(truncated route)"); 1389 break; 1390 case IPOPT_NOP: 1391 (void)printf("\nNOP"); 1392 break; 1393 default: 1394 (void)printf("\nunknown option %x", *cp); 1395 break; 1396 } 1397 if (!(options & F_FLOOD)) { 1398 (void)putchar('\n'); 1399 (void)fflush(stdout); 1400 } 1401 } 1402 1403 /* 1404 * status -- 1405 * Print out statistics when SIGINFO is received. 1406 */ 1407 1408 static void 1409 status(int sig __unused) 1410 { 1411 1412 siginfo_p = 1; 1413 } 1414 1415 static void 1416 check_status(void) 1417 { 1418 1419 if (siginfo_p) { 1420 siginfo_p = 0; 1421 (void)fprintf(stderr, "\r%ld/%ld packets received (%.1f%%)", 1422 nreceived, ntransmitted, 1423 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0); 1424 if (nreceived && timing) 1425 (void)fprintf(stderr, " %.3f min / %.3f avg / %.3f max", 1426 tmin, tsum / (nreceived + nrepeats), tmax); 1427 (void)fprintf(stderr, "\n"); 1428 } 1429 } 1430 1431 /* 1432 * finish -- 1433 * Print out statistics, and give up. 1434 */ 1435 static void 1436 finish(void) 1437 { 1438 1439 (void)signal(SIGINT, SIG_IGN); 1440 (void)signal(SIGALRM, SIG_IGN); 1441 (void)putchar('\n'); 1442 (void)fflush(stdout); 1443 (void)printf("--- %s ping statistics ---\n", hostname); 1444 (void)printf("%ld packets transmitted, ", ntransmitted); 1445 (void)printf("%ld packets received, ", nreceived); 1446 if (nrepeats) 1447 (void)printf("+%ld duplicates, ", nrepeats); 1448 if (ntransmitted) { 1449 if (nreceived > ntransmitted) 1450 (void)printf("-- somebody's printing up packets!"); 1451 else 1452 (void)printf("%.1f%% packet loss", 1453 ((ntransmitted - nreceived) * 100.0) / 1454 ntransmitted); 1455 } 1456 if (nrcvtimeout) 1457 (void)printf(", %ld packets out of wait time", nrcvtimeout); 1458 (void)putchar('\n'); 1459 if (nreceived && timing) { 1460 double n = nreceived + nrepeats; 1461 double avg = tsum / n; 1462 double vari = tsumsq / n - avg * avg; 1463 (void)printf( 1464 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", 1465 tmin, avg, tmax, sqrt(vari)); 1466 } 1467 1468 if (nreceived) 1469 exit(0); 1470 else 1471 exit(2); 1472 } 1473 1474 #ifdef notdef 1475 static char *ttab[] = { 1476 "Echo Reply", /* ip + seq + udata */ 1477 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */ 1478 "Source Quench", /* IP */ 1479 "Redirect", /* redirect type, gateway, + IP */ 1480 "Echo", 1481 "Time Exceeded", /* transit, frag reassem + IP */ 1482 "Parameter Problem", /* pointer + IP */ 1483 "Timestamp", /* id + seq + three timestamps */ 1484 "Timestamp Reply", /* " */ 1485 "Info Request", /* id + sq */ 1486 "Info Reply" /* " */ 1487 }; 1488 #endif 1489 1490 /* 1491 * pr_icmph -- 1492 * Print a descriptive string about an ICMP header. 1493 */ 1494 static void 1495 pr_icmph(struct icmp *icp, struct ip *oip, const u_char *const oicmp_raw) 1496 { 1497 1498 switch(icp->icmp_type) { 1499 case ICMP_ECHOREPLY: 1500 (void)printf("Echo Reply\n"); 1501 /* XXX ID + Seq + Data */ 1502 break; 1503 case ICMP_UNREACH: 1504 switch(icp->icmp_code) { 1505 case ICMP_UNREACH_NET: 1506 (void)printf("Destination Net Unreachable\n"); 1507 break; 1508 case ICMP_UNREACH_HOST: 1509 (void)printf("Destination Host Unreachable\n"); 1510 break; 1511 case ICMP_UNREACH_PROTOCOL: 1512 (void)printf("Destination Protocol Unreachable\n"); 1513 break; 1514 case ICMP_UNREACH_PORT: 1515 (void)printf("Destination Port Unreachable\n"); 1516 break; 1517 case ICMP_UNREACH_NEEDFRAG: 1518 (void)printf("frag needed and DF set (MTU %d)\n", 1519 ntohs(icp->icmp_nextmtu)); 1520 break; 1521 case ICMP_UNREACH_SRCFAIL: 1522 (void)printf("Source Route Failed\n"); 1523 break; 1524 case ICMP_UNREACH_FILTER_PROHIB: 1525 (void)printf("Communication prohibited by filter\n"); 1526 break; 1527 default: 1528 (void)printf("Dest Unreachable, Bad Code: %d\n", 1529 icp->icmp_code); 1530 break; 1531 } 1532 /* Print returned IP header information */ 1533 pr_retip(oip, oicmp_raw); 1534 break; 1535 case ICMP_SOURCEQUENCH: 1536 (void)printf("Source Quench\n"); 1537 pr_retip(oip, oicmp_raw); 1538 break; 1539 case ICMP_REDIRECT: 1540 switch(icp->icmp_code) { 1541 case ICMP_REDIRECT_NET: 1542 (void)printf("Redirect Network"); 1543 break; 1544 case ICMP_REDIRECT_HOST: 1545 (void)printf("Redirect Host"); 1546 break; 1547 case ICMP_REDIRECT_TOSNET: 1548 (void)printf("Redirect Type of Service and Network"); 1549 break; 1550 case ICMP_REDIRECT_TOSHOST: 1551 (void)printf("Redirect Type of Service and Host"); 1552 break; 1553 default: 1554 (void)printf("Redirect, Bad Code: %d", icp->icmp_code); 1555 break; 1556 } 1557 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr)); 1558 pr_retip(oip, oicmp_raw); 1559 break; 1560 case ICMP_ECHO: 1561 (void)printf("Echo Request\n"); 1562 /* XXX ID + Seq + Data */ 1563 break; 1564 case ICMP_TIMXCEED: 1565 switch(icp->icmp_code) { 1566 case ICMP_TIMXCEED_INTRANS: 1567 (void)printf("Time to live exceeded\n"); 1568 break; 1569 case ICMP_TIMXCEED_REASS: 1570 (void)printf("Frag reassembly time exceeded\n"); 1571 break; 1572 default: 1573 (void)printf("Time exceeded, Bad Code: %d\n", 1574 icp->icmp_code); 1575 break; 1576 } 1577 pr_retip(oip, oicmp_raw); 1578 break; 1579 case ICMP_PARAMPROB: 1580 (void)printf("Parameter problem: pointer = 0x%02x\n", 1581 icp->icmp_hun.ih_pptr); 1582 pr_retip(oip, oicmp_raw); 1583 break; 1584 case ICMP_TSTAMP: 1585 (void)printf("Timestamp\n"); 1586 /* XXX ID + Seq + 3 timestamps */ 1587 break; 1588 case ICMP_TSTAMPREPLY: 1589 (void)printf("Timestamp Reply\n"); 1590 /* XXX ID + Seq + 3 timestamps */ 1591 break; 1592 case ICMP_IREQ: 1593 (void)printf("Information Request\n"); 1594 /* XXX ID + Seq */ 1595 break; 1596 case ICMP_IREQREPLY: 1597 (void)printf("Information Reply\n"); 1598 /* XXX ID + Seq */ 1599 break; 1600 case ICMP_MASKREQ: 1601 (void)printf("Address Mask Request\n"); 1602 break; 1603 case ICMP_MASKREPLY: 1604 (void)printf("Address Mask Reply\n"); 1605 break; 1606 case ICMP_ROUTERADVERT: 1607 (void)printf("Router Advertisement\n"); 1608 break; 1609 case ICMP_ROUTERSOLICIT: 1610 (void)printf("Router Solicitation\n"); 1611 break; 1612 default: 1613 (void)printf("Bad ICMP type: %d\n", icp->icmp_type); 1614 } 1615 } 1616 1617 /* 1618 * pr_iph -- 1619 * Print an IP header with options. 1620 */ 1621 static void 1622 pr_iph(struct ip *ip) 1623 { 1624 struct in_addr ina; 1625 u_char *cp; 1626 int hlen; 1627 1628 hlen = ip->ip_hl << 2; 1629 cp = (u_char *)ip + 20; /* point to options */ 1630 1631 (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1632 (void)printf(" %1x %1x %02x %04x %04x", 1633 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len), 1634 ntohs(ip->ip_id)); 1635 (void)printf(" %1lx %04lx", 1636 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13, 1637 (u_long) ntohl(ip->ip_off) & 0x1fff); 1638 (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, 1639 ntohs(ip->ip_sum)); 1640 memcpy(&ina, &ip->ip_src.s_addr, sizeof ina); 1641 (void)printf(" %s ", inet_ntoa(ina)); 1642 memcpy(&ina, &ip->ip_dst.s_addr, sizeof ina); 1643 (void)printf(" %s ", inet_ntoa(ina)); 1644 /* dump any option bytes */ 1645 while (hlen-- > 20) { 1646 (void)printf("%02x", *cp++); 1647 } 1648 (void)putchar('\n'); 1649 } 1650 1651 /* 1652 * pr_addr -- 1653 * Return an ascii host address as a dotted quad and optionally with 1654 * a hostname. 1655 */ 1656 static char * 1657 pr_addr(struct in_addr ina) 1658 { 1659 struct hostent *hp; 1660 static char buf[16 + 3 + MAXHOSTNAMELEN]; 1661 1662 if (options & F_NUMERIC) 1663 return inet_ntoa(ina); 1664 1665 hp = cap_gethostbyaddr(capdns, (char *)&ina, 4, AF_INET); 1666 1667 if (hp == NULL) 1668 return inet_ntoa(ina); 1669 1670 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1671 inet_ntoa(ina)); 1672 return(buf); 1673 } 1674 1675 /* 1676 * pr_retip -- 1677 * Dump some info on a returned (via ICMP) IP packet. 1678 */ 1679 static void 1680 pr_retip(struct ip *ip, const u_char *cp) 1681 { 1682 pr_iph(ip); 1683 1684 if (ip->ip_p == 6) 1685 (void)printf("TCP: from port %u, to port %u (decimal)\n", 1686 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1687 else if (ip->ip_p == 17) 1688 (void)printf("UDP: from port %u, to port %u (decimal)\n", 1689 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1690 } 1691 1692 static char * 1693 pr_ntime(n_time timestamp) 1694 { 1695 static char buf[11]; 1696 int hour, min, sec; 1697 1698 sec = ntohl(timestamp) / 1000; 1699 hour = sec / 60 / 60; 1700 min = (sec % (60 * 60)) / 60; 1701 sec = (sec % (60 * 60)) % 60; 1702 1703 (void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hour, min, sec); 1704 1705 return (buf); 1706 } 1707 1708 static void 1709 fill(char *bp, char *patp) 1710 { 1711 char *cp; 1712 int pat[16]; 1713 u_int ii, jj, kk; 1714 1715 for (cp = patp; *cp; cp++) { 1716 if (!isxdigit(*cp)) 1717 errx(EX_USAGE, 1718 "patterns must be specified as hex digits"); 1719 1720 } 1721 ii = sscanf(patp, 1722 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1723 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 1724 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 1725 &pat[13], &pat[14], &pat[15]); 1726 1727 if (ii > 0) 1728 for (kk = 0; kk <= maxpayload - (TIMEVAL_LEN + ii); kk += ii) 1729 for (jj = 0; jj < ii; ++jj) 1730 bp[jj + kk] = pat[jj]; 1731 if (!(options & F_QUIET)) { 1732 (void)printf("PATTERN: 0x"); 1733 for (jj = 0; jj < ii; ++jj) 1734 (void)printf("%02x", bp[jj] & 0xFF); 1735 (void)printf("\n"); 1736 } 1737 } 1738 1739 static cap_channel_t * 1740 capdns_setup(void) 1741 { 1742 cap_channel_t *capcas, *capdnsloc; 1743 #ifdef WITH_CASPER 1744 const char *types[2]; 1745 int families[1]; 1746 #endif 1747 capcas = cap_init(); 1748 if (capcas == NULL) 1749 err(1, "unable to create casper process"); 1750 capdnsloc = cap_service_open(capcas, "system.dns"); 1751 /* Casper capability no longer needed. */ 1752 cap_close(capcas); 1753 if (capdnsloc == NULL) 1754 err(1, "unable to open system.dns service"); 1755 #ifdef WITH_CASPER 1756 types[0] = "NAME2ADDR"; 1757 types[1] = "ADDR2NAME"; 1758 if (cap_dns_type_limit(capdnsloc, types, 2) < 0) 1759 err(1, "unable to limit access to system.dns service"); 1760 families[0] = AF_INET; 1761 if (cap_dns_family_limit(capdnsloc, families, 1) < 0) 1762 err(1, "unable to limit access to system.dns service"); 1763 #endif 1764 return (capdnsloc); 1765 } 1766 1767 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 1768 #define SECOPT " [-P policy]" 1769 #else 1770 #define SECOPT "" 1771 #endif 1772 static void 1773 usage(void) 1774 { 1775 1776 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 1777 "usage: ping [-AaDdfHnoQqRrv] [-C pcp] [-c count] [-G sweepmaxsize] [-g sweepminsize]", 1778 " [-h sweepincrsize] [-i wait] [-l preload] [-M mask | time] [-m ttl]", 1779 " " SECOPT " [-p pattern] [-S src_addr] [-s packetsize] [-t timeout]", 1780 " [-W waittime] [-z tos] host", 1781 " ping [-AaDdfHLnoQqRrv] [-C pcp] [-c count] [-I iface] [-i wait] [-l preload]", 1782 " [-M mask | time] [-m ttl]" SECOPT " [-p pattern] [-S src_addr]", 1783 " [-s packetsize] [-T ttl] [-t timeout] [-W waittime]", 1784 " [-z tos] mcast-group"); 1785 exit(EX_USAGE); 1786 } 1787