1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Mike Muuss. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static const char copyright[] = 39 "@(#) Copyright (c) 1989, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)ping.c 8.1 (Berkeley) 6/5/93"; 46 #endif 47 static const char rcsid[] = 48 "$FreeBSD$"; 49 #endif /* not lint */ 50 51 /* 52 * P I N G . C 53 * 54 * Using the Internet Control Message Protocol (ICMP) "ECHO" facility, 55 * measure round-trip-delays and packet loss across network paths. 56 * 57 * Author - 58 * Mike Muuss 59 * U. S. Army Ballistic Research Laboratory 60 * December, 1983 61 * 62 * Status - 63 * Public Domain. Distribution Unlimited. 64 * Bugs - 65 * More statistics could always be gathered. 66 * This program has to run SUID to ROOT to access the ICMP socket. 67 */ 68 69 #include <sys/param.h> /* NB: we rely on this for <sys/types.h> */ 70 71 #include <ctype.h> 72 #include <err.h> 73 #include <errno.h> 74 #include <math.h> 75 #include <netdb.h> 76 #include <signal.h> 77 #include <stdio.h> 78 #include <stdlib.h> 79 #include <string.h> 80 #include <sysexits.h> 81 #include <termios.h> 82 #include <unistd.h> 83 84 #include <sys/socket.h> 85 #include <sys/time.h> 86 #include <sys/uio.h> 87 88 #include <netinet/in.h> 89 #include <netinet/in_systm.h> 90 #include <netinet/ip.h> 91 #include <netinet/ip_icmp.h> 92 #include <netinet/ip_var.h> 93 #include <arpa/inet.h> 94 95 #ifdef IPSEC 96 #include <netinet6/ipsec.h> 97 #endif /*IPSEC*/ 98 99 #define INADDR_LEN ((int)sizeof(in_addr_t)) 100 #define PHDR_LEN ((int)sizeof(struct timeval)) 101 #define DEFDATALEN (64 - PHDR_LEN) /* default data length */ 102 #define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */ 103 /* runs out of buffer space */ 104 #define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN) 105 #define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN) 106 #define MINICMPLEN ICMP_MINLEN 107 #define MAXPAYLOAD (IP_MAXPACKET - MAXIPLEN - MINICMPLEN) 108 #define MAXWAIT 10 /* max seconds to wait for response */ 109 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */ 110 111 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 112 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 113 #define SET(bit) (A(bit) |= B(bit)) 114 #define CLR(bit) (A(bit) &= (~B(bit))) 115 #define TST(bit) (A(bit) & B(bit)) 116 117 /* various options */ 118 int options; 119 #define F_FLOOD 0x0001 120 #define F_INTERVAL 0x0002 121 #define F_NUMERIC 0x0004 122 #define F_PINGFILLED 0x0008 123 #define F_QUIET 0x0010 124 #define F_RROUTE 0x0020 125 #define F_SO_DEBUG 0x0040 126 #define F_SO_DONTROUTE 0x0080 127 #define F_VERBOSE 0x0100 128 #define F_QUIET2 0x0200 129 #define F_NOLOOP 0x0400 130 #define F_MTTL 0x0800 131 #define F_MIF 0x1000 132 #define F_AUDIBLE 0x2000 133 #ifdef IPSEC 134 #ifdef IPSEC_POLICY_IPSEC 135 #define F_POLICY 0x4000 136 #endif /*IPSEC_POLICY_IPSEC*/ 137 #endif /*IPSEC*/ 138 #define F_TTL 0x8000 139 #define F_MISSED 0x10000 140 141 /* 142 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 143 * number of received sequence numbers we can keep track of. Change 128 144 * to 8192 for complete accuracy... 145 */ 146 #define MAX_DUP_CHK (8 * 128) 147 int mx_dup_ck = MAX_DUP_CHK; 148 char rcvd_tbl[MAX_DUP_CHK / 8]; 149 150 struct sockaddr_in whereto; /* who to ping */ 151 int datalen = DEFDATALEN; 152 int s; /* socket file descriptor */ 153 u_char outpack[MINICMPLEN + MAXPAYLOAD]; 154 char BSPACE = '\b'; /* characters written for flood */ 155 char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */ 156 char DOT = '.'; 157 char *hostname; 158 char *shostname; 159 int ident; /* process id to identify our packets */ 160 int uid; /* cached uid for micro-optimization */ 161 162 /* counters */ 163 long npackets; /* max packets to transmit */ 164 long nreceived; /* # of packets we got back */ 165 long nrepeats; /* number of duplicates */ 166 long ntransmitted; /* sequence # for outbound packets = #sent */ 167 long nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 168 int interval = 1000; /* interval between packets, ms */ 169 170 /* timing */ 171 int timing; /* flag to do timing */ 172 double tmin = 999999999.0; /* minimum round trip time */ 173 double tmax = 0.0; /* maximum round trip time */ 174 double tsum = 0.0; /* sum of all times, for doing average */ 175 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 176 177 volatile sig_atomic_t finish_up; /* nonzero if we've been told to finish up */ 178 int reset_kerninfo; 179 volatile sig_atomic_t siginfo_p; 180 181 static void fill(char *, char *); 182 static u_short in_cksum(u_short *, int); 183 static void check_status(void); 184 static void finish(void) __dead2; 185 static void pinger(void); 186 static char *pr_addr(struct in_addr); 187 static void pr_icmph(struct icmp *); 188 static void pr_iph(struct ip *); 189 static void pr_pack(char *, int, struct sockaddr_in *, struct timeval *); 190 static void pr_retip(struct ip *); 191 static void status(int); 192 static void stopit(int); 193 static void tvsub(struct timeval *, struct timeval *); 194 static void usage(void) __dead2; 195 196 int 197 main(argc, argv) 198 int argc; 199 char *const *argv; 200 { 201 struct in_addr ifaddr; 202 struct iovec iov; 203 struct msghdr msg; 204 struct sigaction si_sa; 205 struct sockaddr_in from, sin; 206 struct termios ts; 207 struct timeval last, intvl; 208 struct hostent *hp; 209 struct sockaddr_in *to; 210 double t; 211 u_char *datap, packet[IP_MAXPACKET]; 212 char *ep, *source, *target; 213 #ifdef IPSEC_POLICY_IPSEC 214 char *policy_in, *policy_out; 215 #endif 216 u_long alarmtimeout, ultmp; 217 int ch, hold, i, packlen, preload, sockerrno, almost_done = 0, ttl; 218 char ctrl[CMSG_SPACE(sizeof(struct timeval))]; 219 char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN]; 220 #ifdef IP_OPTIONS 221 char rspace[MAX_IPOPTLEN]; /* record route space */ 222 #endif 223 unsigned char mttl, loop; 224 225 source = NULL; 226 #ifdef IPSEC_POLICY_IPSEC 227 policy_in = policy_out = NULL; 228 #endif 229 230 /* 231 * Do the stuff that we need root priv's for *first*, and 232 * then drop our setuid bit. Save error reporting for 233 * after arg parsing. 234 */ 235 s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 236 sockerrno = errno; 237 238 setuid(getuid()); 239 uid = getuid(); 240 241 alarmtimeout = preload = 0; 242 243 datap = &outpack[MINICMPLEN + PHDR_LEN]; 244 while ((ch = getopt(argc, argv, 245 "AI:LQRS:T:c:adfi:l:m:np:qrs:t:v" 246 #ifdef IPSEC 247 #ifdef IPSEC_POLICY_IPSEC 248 "P:" 249 #endif /*IPSEC_POLICY_IPSEC*/ 250 #endif /*IPSEC*/ 251 )) != -1) 252 { 253 switch(ch) { 254 case 'A': 255 options |= F_MISSED; 256 break; 257 case 'a': 258 options |= F_AUDIBLE; 259 break; 260 case 'c': 261 ultmp = strtoul(optarg, &ep, 0); 262 if (*ep || ep == optarg || ultmp > LONG_MAX || !ultmp) 263 errx(EX_USAGE, 264 "invalid count of packets to transmit: `%s'", 265 optarg); 266 npackets = ultmp; 267 break; 268 case 'd': 269 options |= F_SO_DEBUG; 270 break; 271 case 'f': 272 if (uid) { 273 errno = EPERM; 274 err(EX_NOPERM, "-f flag"); 275 } 276 options |= F_FLOOD; 277 setbuf(stdout, (char *)NULL); 278 break; 279 case 'i': /* wait between sending packets */ 280 t = strtod(optarg, &ep) * 1000.0; 281 if (*ep || ep == optarg || t > (double)INT_MAX) 282 errx(EX_USAGE, "invalid timing interval: `%s'", 283 optarg); 284 options |= F_INTERVAL; 285 interval = (int)t; 286 if (uid && interval < 1000) { 287 errno = EPERM; 288 err(EX_NOPERM, "-i interval too short"); 289 } 290 break; 291 case 'I': /* multicast interface */ 292 if (inet_aton(optarg, &ifaddr) == 0) 293 errx(EX_USAGE, 294 "invalid multicast interface: `%s'", 295 optarg); 296 options |= F_MIF; 297 break; 298 case 'l': 299 ultmp = strtoul(optarg, &ep, 0); 300 if (*ep || ep == optarg || ultmp > INT_MAX) 301 errx(EX_USAGE, 302 "invalid preload value: `%s'", optarg); 303 if (uid) { 304 errno = EPERM; 305 err(EX_NOPERM, "-l flag"); 306 } 307 preload = ultmp; 308 break; 309 case 'L': 310 options |= F_NOLOOP; 311 loop = 0; 312 break; 313 case 'm': /* TTL */ 314 ultmp = strtoul(optarg, &ep, 0); 315 if (*ep || ep == optarg || ultmp > 255) 316 errx(EX_USAGE, "invalid TTL: `%s'", optarg); 317 ttl = ultmp; 318 options |= F_TTL; 319 break; 320 case 'n': 321 options |= F_NUMERIC; 322 break; 323 case 'p': /* fill buffer with user pattern */ 324 options |= F_PINGFILLED; 325 fill((char *)datap, optarg); 326 break; 327 case 'Q': 328 options |= F_QUIET2; 329 break; 330 case 'q': 331 options |= F_QUIET; 332 break; 333 case 'R': 334 options |= F_RROUTE; 335 break; 336 case 'r': 337 options |= F_SO_DONTROUTE; 338 break; 339 case 's': /* size of packet to send */ 340 if (uid) { 341 errno = EPERM; 342 err(EX_NOPERM, "-s flag"); 343 } 344 ultmp = strtoul(optarg, &ep, 0); 345 if (ultmp > MAXPAYLOAD) 346 errx(EX_USAGE, 347 "packet size too large: %lu > %u", 348 ultmp, MAXPAYLOAD); 349 if (*ep || ep == optarg) 350 errx(EX_USAGE, "invalid packet size: `%s'", 351 optarg); 352 datalen = ultmp; 353 break; 354 case 'S': 355 source = optarg; 356 break; 357 case 't': 358 alarmtimeout = strtoul(optarg, &ep, 0); 359 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 360 errx(EX_USAGE, "invalid timeout: `%s'", 361 optarg); 362 if (alarmtimeout > MAXALARM) 363 errx(EX_USAGE, "invalid timeout: `%s' > %d", 364 optarg, MAXALARM); 365 alarm((int)alarmtimeout); 366 break; 367 case 'T': /* multicast TTL */ 368 ultmp = strtoul(optarg, &ep, 0); 369 if (*ep || ep == optarg || ultmp > 255) 370 errx(EX_USAGE, "invalid multicast TTL: `%s'", 371 optarg); 372 mttl = ultmp; 373 options |= F_MTTL; 374 break; 375 case 'v': 376 options |= F_VERBOSE; 377 break; 378 #ifdef IPSEC 379 #ifdef IPSEC_POLICY_IPSEC 380 case 'P': 381 options |= F_POLICY; 382 if (!strncmp("in", optarg, 2)) 383 policy_in = strdup(optarg); 384 else if (!strncmp("out", optarg, 3)) 385 policy_out = strdup(optarg); 386 else 387 errx(1, "invalid security policy"); 388 break; 389 #endif /*IPSEC_POLICY_IPSEC*/ 390 #endif /*IPSEC*/ 391 default: 392 usage(); 393 } 394 } 395 396 if (argc - optind != 1) 397 usage(); 398 target = argv[optind]; 399 400 if (source) { 401 bzero((char *)&sin, sizeof(sin)); 402 sin.sin_family = AF_INET; 403 if (inet_aton(source, &sin.sin_addr) != 0) { 404 shostname = source; 405 } else { 406 hp = gethostbyname2(source, AF_INET); 407 if (!hp) 408 errx(EX_NOHOST, "cannot resolve %s: %s", 409 source, hstrerror(h_errno)); 410 411 sin.sin_len = sizeof sin; 412 if (hp->h_length > sizeof(sin.sin_addr) || 413 hp->h_length < 0) 414 errx(1, "gethostbyname2: illegal address"); 415 memcpy(&sin.sin_addr, hp->h_addr_list[0], 416 sizeof(sin.sin_addr)); 417 (void)strncpy(snamebuf, hp->h_name, 418 sizeof(snamebuf) - 1); 419 snamebuf[sizeof(snamebuf) - 1] = '\0'; 420 shostname = snamebuf; 421 } 422 if (bind(s, (struct sockaddr *)&sin, sizeof sin) == -1) 423 err(1, "bind"); 424 } 425 426 bzero(&whereto, sizeof(whereto)); 427 to = &whereto; 428 to->sin_family = AF_INET; 429 to->sin_len = sizeof *to; 430 if (inet_aton(target, &to->sin_addr) != 0) { 431 hostname = target; 432 } else { 433 hp = gethostbyname2(target, AF_INET); 434 if (!hp) 435 errx(EX_NOHOST, "cannot resolve %s: %s", 436 target, hstrerror(h_errno)); 437 438 if (hp->h_length > sizeof(to->sin_addr)) 439 errx(1, "gethostbyname2 returned an illegal address"); 440 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr); 441 (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1); 442 hnamebuf[sizeof(hnamebuf) - 1] = '\0'; 443 hostname = hnamebuf; 444 } 445 446 if (options & F_FLOOD && options & F_INTERVAL) 447 errx(EX_USAGE, "-f and -i: incompatible options"); 448 449 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 450 errx(EX_USAGE, 451 "-f flag cannot be used with multicast destination"); 452 if (options & (F_MIF | F_NOLOOP | F_MTTL) 453 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 454 errx(EX_USAGE, 455 "-I, -L, -T flags cannot be used with unicast destination"); 456 457 if (datalen >= PHDR_LEN) /* can we time transfer */ 458 timing = 1; 459 packlen = MAXIPLEN + MAXICMPLEN + datalen; 460 packlen = packlen > IP_MAXPACKET ? IP_MAXPACKET : packlen; 461 462 if (!(options & F_PINGFILLED)) 463 for (i = PHDR_LEN; i < datalen; ++i) 464 *datap++ = i; 465 466 ident = getpid() & 0xFFFF; 467 468 if (s < 0) { 469 errno = sockerrno; 470 err(EX_OSERR, "socket"); 471 } 472 hold = 1; 473 if (options & F_SO_DEBUG) 474 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold, 475 sizeof(hold)); 476 if (options & F_SO_DONTROUTE) 477 (void)setsockopt(s, SOL_SOCKET, SO_DONTROUTE, (char *)&hold, 478 sizeof(hold)); 479 #ifdef IPSEC 480 #ifdef IPSEC_POLICY_IPSEC 481 if (options & F_POLICY) { 482 char *buf; 483 if (policy_in != NULL) { 484 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 485 if (buf == NULL) 486 errx(EX_CONFIG, "%s", ipsec_strerror()); 487 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 488 buf, ipsec_get_policylen(buf)) < 0) 489 err(EX_CONFIG, 490 "ipsec policy cannot be configured"); 491 free(buf); 492 } 493 494 if (policy_out != NULL) { 495 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 496 if (buf == NULL) 497 errx(EX_CONFIG, "%s", ipsec_strerror()); 498 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 499 buf, ipsec_get_policylen(buf)) < 0) 500 err(EX_CONFIG, 501 "ipsec policy cannot be configured"); 502 free(buf); 503 } 504 } 505 #endif /*IPSEC_POLICY_IPSEC*/ 506 #endif /*IPSEC*/ 507 508 /* record route option */ 509 if (options & F_RROUTE) { 510 #ifdef IP_OPTIONS 511 bzero(rspace, sizeof(rspace)); 512 rspace[IPOPT_OPTVAL] = IPOPT_RR; 513 rspace[IPOPT_OLEN] = sizeof(rspace) - 1; 514 rspace[IPOPT_OFFSET] = IPOPT_MINOFF; 515 rspace[sizeof(rspace) - 1] = IPOPT_EOL; 516 if (setsockopt(s, IPPROTO_IP, IP_OPTIONS, rspace, 517 sizeof(rspace)) < 0) 518 err(EX_OSERR, "setsockopt IP_OPTIONS"); 519 #else 520 errx(EX_UNAVAILABLE, 521 "record route not available in this implementation"); 522 #endif /* IP_OPTIONS */ 523 } 524 525 if (options & F_TTL) { 526 if (setsockopt(s, IPPROTO_IP, IP_TTL, &ttl, 527 sizeof(ttl)) < 0) { 528 err(EX_OSERR, "setsockopt IP_TTL"); 529 } 530 } 531 if (options & F_NOLOOP) { 532 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, 533 sizeof(loop)) < 0) { 534 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP"); 535 } 536 } 537 if (options & F_MTTL) { 538 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &mttl, 539 sizeof(mttl)) < 0) { 540 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL"); 541 } 542 } 543 if (options & F_MIF) { 544 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr, 545 sizeof(ifaddr)) < 0) { 546 err(EX_OSERR, "setsockopt IP_MULTICAST_IF"); 547 } 548 } 549 #ifdef SO_TIMESTAMP 550 { int on = 1; 551 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)) < 0) 552 err(EX_OSERR, "setsockopt SO_TIMESTAMP"); 553 } 554 #endif 555 556 /* 557 * When pinging the broadcast address, you can get a lot of answers. 558 * Doing something so evil is useful if you are trying to stress the 559 * ethernet, or just want to fill the arp cache to get some stuff for 560 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast 561 * or multicast pings if they wish. 562 */ 563 564 /* 565 * XXX receive buffer needs undetermined space for mbuf overhead 566 * as well. 567 */ 568 hold = IP_MAXPACKET + 128; 569 (void)setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 570 sizeof(hold)); 571 572 if (!uid) { 573 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char *)&hold, 574 sizeof(hold)); 575 } 576 577 if (to->sin_family == AF_INET) { 578 (void)printf("PING %s (%s)", hostname, 579 inet_ntoa(to->sin_addr)); 580 if (source) 581 (void)printf(" from %s", shostname); 582 (void)printf(": %d data bytes\n", datalen); 583 } else 584 (void)printf("PING %s: %d data bytes\n", hostname, datalen); 585 586 /* 587 * Use sigaction() instead of signal() to get unambiguous semantics, 588 * in particular with SA_RESTART not set. 589 */ 590 591 sigemptyset(&si_sa.sa_mask); 592 si_sa.sa_flags = 0; 593 594 si_sa.sa_handler = stopit; 595 if (sigaction(SIGINT, &si_sa, 0) == -1) { 596 err(EX_OSERR, "sigaction SIGINT"); 597 } 598 599 si_sa.sa_handler = status; 600 if (sigaction(SIGINFO, &si_sa, 0) == -1) { 601 err(EX_OSERR, "sigaction"); 602 } 603 604 if (alarmtimeout > 0) { 605 si_sa.sa_handler = stopit; 606 if (sigaction(SIGALRM, &si_sa, 0) == -1) 607 err(EX_OSERR, "sigaction SIGALRM"); 608 } 609 610 bzero(&msg, sizeof(msg)); 611 msg.msg_name = (caddr_t)&from; 612 msg.msg_iov = &iov; 613 msg.msg_iovlen = 1; 614 #ifdef SO_TIMESTAMP 615 msg.msg_control = (caddr_t)ctrl; 616 #endif 617 iov.iov_base = packet; 618 iov.iov_len = packlen; 619 620 if (tcgetattr(STDOUT_FILENO, &ts) != -1) { 621 reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 622 ts.c_lflag |= NOKERNINFO; 623 tcsetattr(STDOUT_FILENO, TCSANOW, &ts); 624 } 625 626 if (preload == 0) 627 pinger(); /* send the first ping */ 628 else { 629 if (npackets != 0 && preload > npackets) 630 preload = npackets; 631 while (preload--) /* fire off them quickies */ 632 pinger(); 633 } 634 (void)gettimeofday(&last, NULL); 635 636 if (options & F_FLOOD) { 637 intvl.tv_sec = 0; 638 intvl.tv_usec = 10000; 639 } else { 640 intvl.tv_sec = interval / 1000; 641 intvl.tv_usec = interval % 1000 * 1000; 642 } 643 644 while (!finish_up) { 645 int cc; 646 int n; 647 struct timeval timeout, now; 648 fd_set rfds; 649 650 check_status(); 651 FD_ZERO(&rfds); 652 FD_SET(s, &rfds); 653 (void)gettimeofday(&now, NULL); 654 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec; 655 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec; 656 while (timeout.tv_usec < 0) { 657 timeout.tv_usec += 1000000; 658 timeout.tv_sec--; 659 } 660 while (timeout.tv_usec >= 1000000) { 661 timeout.tv_usec -= 1000000; 662 timeout.tv_sec++; 663 } 664 if (timeout.tv_sec < 0) 665 timeout.tv_sec = timeout.tv_usec = 0; 666 n = select(s + 1, &rfds, NULL, NULL, &timeout); 667 if (n < 0) 668 continue; /* Must be EINTR. */ 669 if (n == 1) { 670 struct timeval *t = 0; 671 #ifdef SO_TIMESTAMP 672 struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl; 673 674 msg.msg_controllen = sizeof(ctrl); 675 #endif 676 msg.msg_namelen = sizeof(from); 677 if ((cc = recvmsg(s, &msg, 0)) < 0) { 678 if (errno == EINTR) 679 continue; 680 warn("recvmsg"); 681 continue; 682 } 683 #ifdef SO_TIMESTAMP 684 if (cmsg->cmsg_level == SOL_SOCKET && 685 cmsg->cmsg_type == SCM_TIMESTAMP && 686 cmsg->cmsg_len == CMSG_LEN(sizeof *t)) { 687 /* Copy to avoid alignment problems: */ 688 memcpy(&now,CMSG_DATA(cmsg),sizeof(now)); 689 t = &now; 690 } 691 #endif 692 if (t == 0) { 693 (void)gettimeofday(&now, NULL); 694 t = &now; 695 } 696 pr_pack((char *)packet, cc, &from, t); 697 if (npackets && nreceived >= npackets) 698 break; 699 } 700 if (n == 0 || options & F_FLOOD) { 701 if (!npackets || ntransmitted < npackets) 702 pinger(); 703 else { 704 if (almost_done) 705 break; 706 almost_done = 1; 707 intvl.tv_usec = 0; 708 if (nreceived) { 709 intvl.tv_sec = 2 * tmax / 1000; 710 if (!intvl.tv_sec) 711 intvl.tv_sec = 1; 712 } else 713 intvl.tv_sec = MAXWAIT; 714 } 715 (void)gettimeofday(&last, NULL); 716 717 if (ntransmitted - nreceived - 1 > nmissedmax) { 718 nmissedmax = ntransmitted - nreceived - 1; 719 if (options & F_MISSED) 720 (void)write(STDOUT_FILENO, &BBELL, 1); 721 } 722 } 723 } 724 finish(); 725 /* NOTREACHED */ 726 exit(0); /* Make the compiler happy */ 727 } 728 729 /* 730 * stopit -- 731 * Set the global bit that causes the main loop to quit. 732 * Do NOT call finish() from here, since finish() does far too much 733 * to be called from a signal handler. 734 */ 735 void 736 stopit(sig) 737 int sig __unused; 738 { 739 740 finish_up = 1; 741 } 742 743 /* 744 * pinger -- 745 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 746 * will be added on by the kernel. The ID field is our UNIX process ID, 747 * and the sequence number is an ascending integer. The first PHDR_LEN 748 * bytes of the data portion are used to hold a UNIX "timeval" struct in 749 * host byte-order, to compute the round-trip time. 750 */ 751 static void 752 pinger(void) 753 { 754 struct icmp *icp; 755 int cc, i; 756 757 icp = (struct icmp *)outpack; 758 icp->icmp_type = ICMP_ECHO; 759 icp->icmp_code = 0; 760 icp->icmp_cksum = 0; 761 icp->icmp_seq = htons(ntransmitted); 762 icp->icmp_id = ident; /* ID */ 763 764 CLR(ntransmitted % mx_dup_ck); 765 766 if (timing) 767 (void)gettimeofday((struct timeval *)&outpack[MINICMPLEN], 768 (struct timezone *)NULL); 769 770 cc = MINICMPLEN + datalen; 771 772 /* compute ICMP checksum here */ 773 icp->icmp_cksum = in_cksum((u_short *)icp, cc); 774 775 i = sendto(s, (char *)outpack, cc, 0, (struct sockaddr *)&whereto, 776 sizeof(whereto)); 777 778 if (i < 0 || i != cc) { 779 if (i < 0) { 780 if (options & F_FLOOD && errno == ENOBUFS) { 781 usleep(FLOOD_BACKOFF); 782 return; 783 } 784 warn("sendto"); 785 } else { 786 warn("%s: partial write: %d of %d bytes", 787 hostname, i, cc); 788 } 789 } 790 ntransmitted++; 791 if (!(options & F_QUIET) && options & F_FLOOD) 792 (void)write(STDOUT_FILENO, &DOT, 1); 793 } 794 795 /* 796 * pr_pack -- 797 * Print out the packet, if it came from us. This logic is necessary 798 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 799 * which arrive ('tis only fair). This permits multiple copies of this 800 * program to be run without having intermingled output (or statistics!). 801 */ 802 static void 803 pr_pack(buf, cc, from, tv) 804 char *buf; 805 int cc; 806 struct sockaddr_in *from; 807 struct timeval *tv; 808 { 809 struct icmp *icp; 810 struct ip *ip; 811 struct in_addr ina; 812 struct timeval *tp; 813 u_char *cp, *dp; 814 double triptime; 815 int dupflag, hlen, i, j, seq; 816 static int old_rrlen; 817 static char old_rr[MAX_IPOPTLEN]; 818 819 /* Check the IP header */ 820 ip = (struct ip *)buf; 821 hlen = ip->ip_hl << 2; 822 if (cc < hlen + ICMP_MINLEN) { 823 if (options & F_VERBOSE) 824 warn("packet too short (%d bytes) from %s", cc, 825 inet_ntoa(from->sin_addr)); 826 return; 827 } 828 829 /* Now the ICMP part */ 830 cc -= hlen; 831 icp = (struct icmp *)(buf + hlen); 832 if (icp->icmp_type == ICMP_ECHOREPLY) { 833 if (icp->icmp_id != ident) 834 return; /* 'Twas not our ECHO */ 835 ++nreceived; 836 triptime = 0.0; 837 if (timing) { 838 struct timeval tv1; 839 #ifndef icmp_data 840 tp = (struct timeval *)&icp->icmp_ip; 841 #else 842 tp = (struct timeval *)icp->icmp_data; 843 #endif 844 /* Avoid unaligned data: */ 845 memcpy(&tv1,tp,sizeof(tv1)); 846 tvsub(tv, &tv1); 847 triptime = ((double)tv->tv_sec) * 1000.0 + 848 ((double)tv->tv_usec) / 1000.0; 849 tsum += triptime; 850 tsumsq += triptime * triptime; 851 if (triptime < tmin) 852 tmin = triptime; 853 if (triptime > tmax) 854 tmax = triptime; 855 } 856 857 seq = ntohs(icp->icmp_seq); 858 859 if (TST(seq % mx_dup_ck)) { 860 ++nrepeats; 861 --nreceived; 862 dupflag = 1; 863 } else { 864 SET(seq % mx_dup_ck); 865 dupflag = 0; 866 } 867 868 if (options & F_QUIET) 869 return; 870 871 if (options & F_FLOOD) 872 (void)write(STDOUT_FILENO, &BSPACE, 1); 873 else { 874 (void)printf("%d bytes from %s: icmp_seq=%u", cc, 875 inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr), 876 seq); 877 (void)printf(" ttl=%d", ip->ip_ttl); 878 if (timing) 879 (void)printf(" time=%.3f ms", triptime); 880 if (dupflag) 881 (void)printf(" (DUP!)"); 882 if (options & F_AUDIBLE) 883 (void)write(STDOUT_FILENO, &BBELL, 1); 884 /* check the data */ 885 cp = (u_char*)&icp->icmp_data[PHDR_LEN]; 886 dp = &outpack[MINICMPLEN + PHDR_LEN]; 887 for (i = PHDR_LEN; i < datalen; ++i, ++cp, ++dp) { 888 if (*cp != *dp) { 889 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", 890 i, *dp, *cp); 891 (void)printf("\ncp:"); 892 cp = (u_char*)&icp->icmp_data[0]; 893 for (i = 0; i < datalen; ++i, ++cp) { 894 if ((i % 32) == 8) 895 (void)printf("\n\t"); 896 (void)printf("%x ", *cp); 897 } 898 (void)printf("\ndp:"); 899 cp = &outpack[MINICMPLEN]; 900 for (i = 0; i < datalen; ++i, ++cp) { 901 if ((i % 32) == 8) 902 (void)printf("\n\t"); 903 (void)printf("%x ", *cp); 904 } 905 break; 906 } 907 } 908 } 909 } else { 910 /* 911 * We've got something other than an ECHOREPLY. 912 * See if it's a reply to something that we sent. 913 * We can compare IP destination, protocol, 914 * and ICMP type and ID. 915 * 916 * Only print all the error messages if we are running 917 * as root to avoid leaking information not normally 918 * available to those not running as root. 919 */ 920 #ifndef icmp_data 921 struct ip *oip = &icp->icmp_ip; 922 #else 923 struct ip *oip = (struct ip *)icp->icmp_data; 924 #endif 925 struct icmp *oicmp = (struct icmp *)(oip + 1); 926 927 if (((options & F_VERBOSE) && uid == 0) || 928 (!(options & F_QUIET2) && 929 (oip->ip_dst.s_addr == whereto.sin_addr.s_addr) && 930 (oip->ip_p == IPPROTO_ICMP) && 931 (oicmp->icmp_type == ICMP_ECHO) && 932 (oicmp->icmp_id == ident))) { 933 (void)printf("%d bytes from %s: ", cc, 934 pr_addr(from->sin_addr)); 935 pr_icmph(icp); 936 } else 937 return; 938 } 939 940 /* Display any IP options */ 941 cp = (u_char *)buf + sizeof(struct ip); 942 943 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp) 944 switch (*cp) { 945 case IPOPT_EOL: 946 hlen = 0; 947 break; 948 case IPOPT_LSRR: 949 (void)printf("\nLSRR: "); 950 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1; 951 hlen -= 2; 952 cp += 2; 953 if (j >= INADDR_LEN && j <= hlen - INADDR_LEN) { 954 for (;;) { 955 bcopy(++cp, &ina.s_addr, INADDR_LEN); 956 if (ina.s_addr == 0) 957 (void)printf("\t0.0.0.0"); 958 else 959 (void)printf("\t%s", 960 pr_addr(ina)); 961 hlen -= INADDR_LEN; 962 cp += INADDR_LEN - 1; 963 j -= INADDR_LEN; 964 if (j < INADDR_LEN) 965 break; 966 (void)putchar('\n'); 967 } 968 } else 969 (void)printf("\t(truncated route)\n"); 970 break; 971 case IPOPT_RR: 972 j = cp[IPOPT_OLEN]; /* get length */ 973 i = cp[IPOPT_OFFSET]; /* and pointer */ 974 hlen -= 2; 975 cp += 2; 976 if (i > j) 977 i = j; 978 i = i - IPOPT_MINOFF + 1; 979 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) { 980 old_rrlen = 0; 981 continue; 982 } 983 if (i == old_rrlen 984 && !bcmp((char *)cp, old_rr, i) 985 && !(options & F_FLOOD)) { 986 (void)printf("\t(same route)"); 987 hlen -= i; 988 cp += i; 989 break; 990 } 991 old_rrlen = i; 992 bcopy((char *)cp, old_rr, i); 993 994 (void)printf("\nRR: "); 995 996 if (i >= INADDR_LEN && 997 i <= hlen - (int)sizeof(struct ip)) { 998 for (;;) { 999 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1000 if (ina.s_addr == 0) 1001 (void)printf("\t0.0.0.0"); 1002 else 1003 (void)printf("\t%s", 1004 pr_addr(ina)); 1005 hlen -= INADDR_LEN; 1006 cp += INADDR_LEN - 1; 1007 i -= INADDR_LEN; 1008 if (i < INADDR_LEN) 1009 break; 1010 (void)putchar('\n'); 1011 } 1012 } else 1013 (void)printf("\t(truncated route)"); 1014 break; 1015 case IPOPT_NOP: 1016 (void)printf("\nNOP"); 1017 break; 1018 default: 1019 (void)printf("\nunknown option %x", *cp); 1020 break; 1021 } 1022 if (!(options & F_FLOOD)) { 1023 (void)putchar('\n'); 1024 (void)fflush(stdout); 1025 } 1026 } 1027 1028 /* 1029 * in_cksum -- 1030 * Checksum routine for Internet Protocol family headers (C Version) 1031 */ 1032 u_short 1033 in_cksum(addr, len) 1034 u_short *addr; 1035 int len; 1036 { 1037 int nleft, sum; 1038 u_short *w; 1039 union { 1040 u_short us; 1041 u_char uc[2]; 1042 } last; 1043 u_short answer; 1044 1045 nleft = len; 1046 sum = 0; 1047 w = addr; 1048 1049 /* 1050 * Our algorithm is simple, using a 32 bit accumulator (sum), we add 1051 * sequential 16 bit words to it, and at the end, fold back all the 1052 * carry bits from the top 16 bits into the lower 16 bits. 1053 */ 1054 while (nleft > 1) { 1055 sum += *w++; 1056 nleft -= 2; 1057 } 1058 1059 /* mop up an odd byte, if necessary */ 1060 if (nleft == 1) { 1061 last.uc[0] = *(u_char *)w; 1062 last.uc[1] = 0; 1063 sum += last.us; 1064 } 1065 1066 /* add back carry outs from top 16 bits to low 16 bits */ 1067 sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */ 1068 sum += (sum >> 16); /* add carry */ 1069 answer = ~sum; /* truncate to 16 bits */ 1070 return(answer); 1071 } 1072 1073 /* 1074 * tvsub -- 1075 * Subtract 2 timeval structs: out = out - in. Out is assumed to 1076 * be >= in. 1077 */ 1078 static void 1079 tvsub(out, in) 1080 struct timeval *out, *in; 1081 { 1082 1083 if ((out->tv_usec -= in->tv_usec) < 0) { 1084 --out->tv_sec; 1085 out->tv_usec += 1000000; 1086 } 1087 out->tv_sec -= in->tv_sec; 1088 } 1089 1090 /* 1091 * status -- 1092 * Print out statistics when SIGINFO is received. 1093 */ 1094 1095 static void 1096 status(sig) 1097 int sig __unused; 1098 { 1099 1100 siginfo_p = 1; 1101 } 1102 1103 static void 1104 check_status() 1105 { 1106 1107 if (siginfo_p) { 1108 siginfo_p = 0; 1109 (void)fprintf(stderr, 1110 "\r%ld/%ld packets received (%.0f%%) %.3f min / %.3f avg / %.3f max\n", 1111 nreceived, ntransmitted, 1112 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0, 1113 nreceived ? tmin : 0.0, 1114 nreceived + nrepeats ? tsum / (nreceived + nrepeats) : tsum, 1115 tmax); 1116 } 1117 } 1118 1119 /* 1120 * finish -- 1121 * Print out statistics, and give up. 1122 */ 1123 static void 1124 finish() 1125 { 1126 1127 struct termios ts; 1128 1129 (void)signal(SIGINT, SIG_IGN); 1130 (void)signal(SIGALRM, SIG_IGN); 1131 (void)putchar('\n'); 1132 (void)fflush(stdout); 1133 (void)printf("--- %s ping statistics ---\n", hostname); 1134 (void)printf("%ld packets transmitted, ", ntransmitted); 1135 (void)printf("%ld packets received, ", nreceived); 1136 if (nrepeats) 1137 (void)printf("+%ld duplicates, ", nrepeats); 1138 if (ntransmitted) { 1139 if (nreceived > ntransmitted) 1140 (void)printf("-- somebody's printing up packets!"); 1141 else 1142 (void)printf("%d%% packet loss", 1143 (int)(((ntransmitted - nreceived) * 100) / 1144 ntransmitted)); 1145 } 1146 (void)putchar('\n'); 1147 if (nreceived && timing) { 1148 double n = nreceived + nrepeats; 1149 double avg = tsum / n; 1150 double vari = tsumsq / n - avg * avg; 1151 (void)printf( 1152 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", 1153 tmin, avg, tmax, sqrt(vari)); 1154 } 1155 if (reset_kerninfo && tcgetattr(STDOUT_FILENO, &ts) != -1) { 1156 ts.c_lflag &= ~NOKERNINFO; 1157 tcsetattr(STDOUT_FILENO, TCSANOW, &ts); 1158 } 1159 1160 if (nreceived) 1161 exit(0); 1162 else 1163 exit(2); 1164 } 1165 1166 #ifdef notdef 1167 static char *ttab[] = { 1168 "Echo Reply", /* ip + seq + udata */ 1169 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */ 1170 "Source Quench", /* IP */ 1171 "Redirect", /* redirect type, gateway, + IP */ 1172 "Echo", 1173 "Time Exceeded", /* transit, frag reassem + IP */ 1174 "Parameter Problem", /* pointer + IP */ 1175 "Timestamp", /* id + seq + three timestamps */ 1176 "Timestamp Reply", /* " */ 1177 "Info Request", /* id + sq */ 1178 "Info Reply" /* " */ 1179 }; 1180 #endif 1181 1182 /* 1183 * pr_icmph -- 1184 * Print a descriptive string about an ICMP header. 1185 */ 1186 static void 1187 pr_icmph(icp) 1188 struct icmp *icp; 1189 { 1190 1191 switch(icp->icmp_type) { 1192 case ICMP_ECHOREPLY: 1193 (void)printf("Echo Reply\n"); 1194 /* XXX ID + Seq + Data */ 1195 break; 1196 case ICMP_UNREACH: 1197 switch(icp->icmp_code) { 1198 case ICMP_UNREACH_NET: 1199 (void)printf("Destination Net Unreachable\n"); 1200 break; 1201 case ICMP_UNREACH_HOST: 1202 (void)printf("Destination Host Unreachable\n"); 1203 break; 1204 case ICMP_UNREACH_PROTOCOL: 1205 (void)printf("Destination Protocol Unreachable\n"); 1206 break; 1207 case ICMP_UNREACH_PORT: 1208 (void)printf("Destination Port Unreachable\n"); 1209 break; 1210 case ICMP_UNREACH_NEEDFRAG: 1211 (void)printf("frag needed and DF set (MTU %d)\n", 1212 ntohs(icp->icmp_nextmtu)); 1213 break; 1214 case ICMP_UNREACH_SRCFAIL: 1215 (void)printf("Source Route Failed\n"); 1216 break; 1217 case ICMP_UNREACH_FILTER_PROHIB: 1218 (void)printf("Communication prohibited by filter\n"); 1219 break; 1220 default: 1221 (void)printf("Dest Unreachable, Bad Code: %d\n", 1222 icp->icmp_code); 1223 break; 1224 } 1225 /* Print returned IP header information */ 1226 #ifndef icmp_data 1227 pr_retip(&icp->icmp_ip); 1228 #else 1229 pr_retip((struct ip *)icp->icmp_data); 1230 #endif 1231 break; 1232 case ICMP_SOURCEQUENCH: 1233 (void)printf("Source Quench\n"); 1234 #ifndef icmp_data 1235 pr_retip(&icp->icmp_ip); 1236 #else 1237 pr_retip((struct ip *)icp->icmp_data); 1238 #endif 1239 break; 1240 case ICMP_REDIRECT: 1241 switch(icp->icmp_code) { 1242 case ICMP_REDIRECT_NET: 1243 (void)printf("Redirect Network"); 1244 break; 1245 case ICMP_REDIRECT_HOST: 1246 (void)printf("Redirect Host"); 1247 break; 1248 case ICMP_REDIRECT_TOSNET: 1249 (void)printf("Redirect Type of Service and Network"); 1250 break; 1251 case ICMP_REDIRECT_TOSHOST: 1252 (void)printf("Redirect Type of Service and Host"); 1253 break; 1254 default: 1255 (void)printf("Redirect, Bad Code: %d", icp->icmp_code); 1256 break; 1257 } 1258 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr)); 1259 #ifndef icmp_data 1260 pr_retip(&icp->icmp_ip); 1261 #else 1262 pr_retip((struct ip *)icp->icmp_data); 1263 #endif 1264 break; 1265 case ICMP_ECHO: 1266 (void)printf("Echo Request\n"); 1267 /* XXX ID + Seq + Data */ 1268 break; 1269 case ICMP_TIMXCEED: 1270 switch(icp->icmp_code) { 1271 case ICMP_TIMXCEED_INTRANS: 1272 (void)printf("Time to live exceeded\n"); 1273 break; 1274 case ICMP_TIMXCEED_REASS: 1275 (void)printf("Frag reassembly time exceeded\n"); 1276 break; 1277 default: 1278 (void)printf("Time exceeded, Bad Code: %d\n", 1279 icp->icmp_code); 1280 break; 1281 } 1282 #ifndef icmp_data 1283 pr_retip(&icp->icmp_ip); 1284 #else 1285 pr_retip((struct ip *)icp->icmp_data); 1286 #endif 1287 break; 1288 case ICMP_PARAMPROB: 1289 (void)printf("Parameter problem: pointer = 0x%02x\n", 1290 icp->icmp_hun.ih_pptr); 1291 #ifndef icmp_data 1292 pr_retip(&icp->icmp_ip); 1293 #else 1294 pr_retip((struct ip *)icp->icmp_data); 1295 #endif 1296 break; 1297 case ICMP_TSTAMP: 1298 (void)printf("Timestamp\n"); 1299 /* XXX ID + Seq + 3 timestamps */ 1300 break; 1301 case ICMP_TSTAMPREPLY: 1302 (void)printf("Timestamp Reply\n"); 1303 /* XXX ID + Seq + 3 timestamps */ 1304 break; 1305 case ICMP_IREQ: 1306 (void)printf("Information Request\n"); 1307 /* XXX ID + Seq */ 1308 break; 1309 case ICMP_IREQREPLY: 1310 (void)printf("Information Reply\n"); 1311 /* XXX ID + Seq */ 1312 break; 1313 case ICMP_MASKREQ: 1314 (void)printf("Address Mask Request\n"); 1315 break; 1316 case ICMP_MASKREPLY: 1317 (void)printf("Address Mask Reply\n"); 1318 break; 1319 case ICMP_ROUTERADVERT: 1320 (void)printf("Router Advertisement\n"); 1321 break; 1322 case ICMP_ROUTERSOLICIT: 1323 (void)printf("Router Solicitation\n"); 1324 break; 1325 default: 1326 (void)printf("Bad ICMP type: %d\n", icp->icmp_type); 1327 } 1328 } 1329 1330 /* 1331 * pr_iph -- 1332 * Print an IP header with options. 1333 */ 1334 static void 1335 pr_iph(ip) 1336 struct ip *ip; 1337 { 1338 u_char *cp; 1339 int hlen; 1340 1341 hlen = ip->ip_hl << 2; 1342 cp = (u_char *)ip + 20; /* point to options */ 1343 1344 (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1345 (void)printf(" %1x %1x %02x %04x %04x", 1346 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len), 1347 ntohs(ip->ip_id)); 1348 (void)printf(" %1lx %04lx", 1349 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13, 1350 (u_long) ntohl(ip->ip_off) & 0x1fff); 1351 (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, 1352 ntohs(ip->ip_sum)); 1353 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1354 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1355 /* dump any option bytes */ 1356 while (hlen-- > 20) { 1357 (void)printf("%02x", *cp++); 1358 } 1359 (void)putchar('\n'); 1360 } 1361 1362 /* 1363 * pr_addr -- 1364 * Return an ascii host address as a dotted quad and optionally with 1365 * a hostname. 1366 */ 1367 static char * 1368 pr_addr(ina) 1369 struct in_addr ina; 1370 { 1371 struct hostent *hp; 1372 static char buf[16 + 3 + MAXHOSTNAMELEN]; 1373 1374 if ((options & F_NUMERIC) || 1375 !(hp = gethostbyaddr((char *)&ina, 4, AF_INET))) 1376 return inet_ntoa(ina); 1377 else 1378 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1379 inet_ntoa(ina)); 1380 return(buf); 1381 } 1382 1383 /* 1384 * pr_retip -- 1385 * Dump some info on a returned (via ICMP) IP packet. 1386 */ 1387 static void 1388 pr_retip(ip) 1389 struct ip *ip; 1390 { 1391 u_char *cp; 1392 int hlen; 1393 1394 pr_iph(ip); 1395 hlen = ip->ip_hl << 2; 1396 cp = (u_char *)ip + hlen; 1397 1398 if (ip->ip_p == 6) 1399 (void)printf("TCP: from port %u, to port %u (decimal)\n", 1400 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1401 else if (ip->ip_p == 17) 1402 (void)printf("UDP: from port %u, to port %u (decimal)\n", 1403 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1404 } 1405 1406 static void 1407 fill(bp, patp) 1408 char *bp, *patp; 1409 { 1410 char *cp; 1411 int pat[16]; 1412 u_int ii, jj, kk; 1413 1414 for (cp = patp; *cp; cp++) { 1415 if (!isxdigit(*cp)) 1416 errx(EX_USAGE, 1417 "patterns must be specified as hex digits"); 1418 1419 } 1420 ii = sscanf(patp, 1421 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1422 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 1423 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 1424 &pat[13], &pat[14], &pat[15]); 1425 1426 if (ii > 0) 1427 for (kk = 0; kk <= MAXPAYLOAD - (PHDR_LEN + ii); kk += ii) 1428 for (jj = 0; jj < ii; ++jj) 1429 bp[jj + kk] = pat[jj]; 1430 if (!(options & F_QUIET)) { 1431 (void)printf("PATTERN: 0x"); 1432 for (jj = 0; jj < ii; ++jj) 1433 (void)printf("%02x", bp[jj] & 0xFF); 1434 (void)printf("\n"); 1435 } 1436 } 1437 1438 static void 1439 usage() 1440 { 1441 (void)fprintf(stderr, "%s\n%s\n%s\n", 1442 "usage: ping [-QRadfnqrv] [-c count] [-i wait] [-l preload] [-m ttl]", 1443 " [-p pattern] " 1444 #ifdef IPSEC 1445 #ifdef IPSEC_POLICY_IPSEC 1446 "[-P policy] " 1447 #endif 1448 #endif 1449 "[-s packetsize] [-S src_addr] [-t timeout]", 1450 " [host | [-L] [-I iface] [-T ttl] mcast-group]"); 1451 exit(EX_USAGE); 1452 } 1453