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 * @(#) Copyright (c) 1989, 1993 The Regents of the University of California. All rights reserved. 37 * @(#)ping.c 8.1 (Berkeley) 6/5/93 38 * $FreeBSD: src/sbin/ping/ping.c,v 1.52.2.13 2002/10/29 10:23:21 maxim Exp $ 39 * $DragonFly: src/sbin/ping/ping.c,v 1.4 2004/12/18 21:43:39 swildner Exp $ 40 */ 41 42 /* 43 * P I N G . C 44 * 45 * Using the Internet Control Message Protocol (ICMP) "ECHO" facility, 46 * measure round-trip-delays and packet loss across network paths. 47 * 48 * Author - 49 * Mike Muuss 50 * U. S. Army Ballistic Research Laboratory 51 * December, 1983 52 * 53 * Status - 54 * Public Domain. Distribution Unlimited. 55 * Bugs - 56 * More statistics could always be gathered. 57 * This program has to run SUID to ROOT to access the ICMP socket. 58 */ 59 60 #include <sys/param.h> /* NB: we rely on this for <sys/types.h> */ 61 62 #include <ctype.h> 63 #include <err.h> 64 #include <errno.h> 65 #include <math.h> 66 #include <netdb.h> 67 #include <signal.h> 68 #include <stdio.h> 69 #include <stdlib.h> 70 #include <string.h> 71 #include <sysexits.h> 72 #include <termios.h> 73 #include <unistd.h> 74 75 #include <sys/socket.h> 76 #include <sys/time.h> 77 #include <sys/uio.h> 78 79 #include <netinet/in.h> 80 #include <netinet/in_systm.h> 81 #include <netinet/ip.h> 82 #include <netinet/ip_icmp.h> 83 #include <netinet/ip_var.h> 84 #include <arpa/inet.h> 85 86 #ifdef IPSEC 87 #include <netinet6/ipsec.h> 88 #endif /*IPSEC*/ 89 90 #define INADDR_LEN ((int)sizeof(in_addr_t)) 91 #define PHDR_LEN ((int)sizeof(struct timeval)) 92 #define DEFDATALEN (64 - PHDR_LEN) /* default data length */ 93 #define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */ 94 /* runs out of buffer space */ 95 #define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN) 96 #define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN) 97 #define MINICMPLEN ICMP_MINLEN 98 #define MAXPAYLOAD (IP_MAXPACKET - MAXIPLEN - MINICMPLEN) 99 #define MAXWAIT 10 /* max seconds to wait for response */ 100 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */ 101 102 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 103 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 104 #define SET(bit) (A(bit) |= B(bit)) 105 #define CLR(bit) (A(bit) &= (~B(bit))) 106 #define TST(bit) (A(bit) & B(bit)) 107 108 /* various options */ 109 int options; 110 #define F_FLOOD 0x0001 111 #define F_INTERVAL 0x0002 112 #define F_NUMERIC 0x0004 113 #define F_PINGFILLED 0x0008 114 #define F_QUIET 0x0010 115 #define F_RROUTE 0x0020 116 #define F_SO_DEBUG 0x0040 117 #define F_SO_DONTROUTE 0x0080 118 #define F_VERBOSE 0x0100 119 #define F_QUIET2 0x0200 120 #define F_NOLOOP 0x0400 121 #define F_MTTL 0x0800 122 #define F_MIF 0x1000 123 #define F_AUDIBLE 0x2000 124 #ifdef IPSEC 125 #ifdef IPSEC_POLICY_IPSEC 126 #define F_POLICY 0x4000 127 #endif /*IPSEC_POLICY_IPSEC*/ 128 #endif /*IPSEC*/ 129 #define F_TTL 0x8000 130 #define F_MISSED 0x10000 131 132 /* 133 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 134 * number of received sequence numbers we can keep track of. Change 128 135 * to 8192 for complete accuracy... 136 */ 137 #define MAX_DUP_CHK (8 * 128) 138 int mx_dup_ck = MAX_DUP_CHK; 139 char rcvd_tbl[MAX_DUP_CHK / 8]; 140 141 struct sockaddr_in whereto; /* who to ping */ 142 int datalen = DEFDATALEN; 143 int s; /* socket file descriptor */ 144 u_char outpack[MINICMPLEN + MAXPAYLOAD]; 145 char BSPACE = '\b'; /* characters written for flood */ 146 char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */ 147 char DOT = '.'; 148 char *hostname; 149 char *shostname; 150 int ident; /* process id to identify our packets */ 151 int uid; /* cached uid for micro-optimization */ 152 153 /* counters */ 154 long npackets; /* max packets to transmit */ 155 long nreceived; /* # of packets we got back */ 156 long nrepeats; /* number of duplicates */ 157 long ntransmitted; /* sequence # for outbound packets = #sent */ 158 long nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 159 int interval = 1000; /* interval between packets, ms */ 160 161 /* timing */ 162 int timing; /* flag to do timing */ 163 double tmin = 999999999.0; /* minimum round trip time */ 164 double tmax = 0.0; /* maximum round trip time */ 165 double tsum = 0.0; /* sum of all times, for doing average */ 166 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 167 168 volatile sig_atomic_t finish_up; /* nonzero if we've been told to finish up */ 169 int reset_kerninfo; 170 volatile sig_atomic_t siginfo_p; 171 172 static void fill(char *, char *); 173 static u_short in_cksum(u_short *, int); 174 static void check_status(void); 175 static void finish(void) __dead2; 176 static void pinger(void); 177 static char *pr_addr(struct in_addr); 178 static void pr_icmph(struct icmp *); 179 static void pr_iph(struct ip *); 180 static void pr_pack(char *, int, struct sockaddr_in *, struct timeval *); 181 static void pr_retip(struct ip *); 182 static void status(int); 183 static void stopit(int); 184 static void tvsub(struct timeval *, struct timeval *); 185 static void usage(void) __dead2; 186 187 int 188 main(int argc, char **argv) 189 { 190 struct in_addr ifaddr; 191 struct iovec iov; 192 struct msghdr msg; 193 struct sigaction si_sa; 194 struct sockaddr_in from, sin; 195 struct termios ts; 196 struct timeval last, intvl; 197 struct hostent *hp; 198 struct sockaddr_in *to; 199 double t; 200 u_char *datap, packet[IP_MAXPACKET]; 201 char *ep, *source, *target; 202 #ifdef IPSEC_POLICY_IPSEC 203 char *policy_in, *policy_out; 204 #endif 205 u_long alarmtimeout, ultmp; 206 int ch, hold, i, packlen, preload, sockerrno, almost_done = 0, ttl; 207 char ctrl[CMSG_SPACE(sizeof(struct timeval))]; 208 char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN]; 209 #ifdef IP_OPTIONS 210 char rspace[MAX_IPOPTLEN]; /* record route space */ 211 #endif 212 unsigned char mttl, loop; 213 214 source = NULL; 215 #ifdef IPSEC_POLICY_IPSEC 216 policy_in = policy_out = NULL; 217 #endif 218 219 /* 220 * Do the stuff that we need root priv's for *first*, and 221 * then drop our setuid bit. Save error reporting for 222 * after arg parsing. 223 */ 224 s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 225 sockerrno = errno; 226 227 setuid(getuid()); 228 uid = getuid(); 229 230 alarmtimeout = preload = 0; 231 232 datap = &outpack[MINICMPLEN + PHDR_LEN]; 233 while ((ch = getopt(argc, argv, 234 "AI:LQRS:T:c:adfi:l:m:np:qrs:t:v" 235 #ifdef IPSEC 236 #ifdef IPSEC_POLICY_IPSEC 237 "P:" 238 #endif /*IPSEC_POLICY_IPSEC*/ 239 #endif /*IPSEC*/ 240 )) != -1) 241 { 242 switch(ch) { 243 case 'A': 244 options |= F_MISSED; 245 break; 246 case 'a': 247 options |= F_AUDIBLE; 248 break; 249 case 'c': 250 ultmp = strtoul(optarg, &ep, 0); 251 if (*ep || ep == optarg || ultmp > LONG_MAX || !ultmp) 252 errx(EX_USAGE, 253 "invalid count of packets to transmit: `%s'", 254 optarg); 255 npackets = ultmp; 256 break; 257 case 'd': 258 options |= F_SO_DEBUG; 259 break; 260 case 'f': 261 if (uid) { 262 errno = EPERM; 263 err(EX_NOPERM, "-f flag"); 264 } 265 options |= F_FLOOD; 266 setbuf(stdout, (char *)NULL); 267 break; 268 case 'i': /* wait between sending packets */ 269 t = strtod(optarg, &ep) * 1000.0; 270 if (*ep || ep == optarg || t > (double)INT_MAX) 271 errx(EX_USAGE, "invalid timing interval: `%s'", 272 optarg); 273 options |= F_INTERVAL; 274 interval = (int)t; 275 if (uid && interval < 1000) { 276 errno = EPERM; 277 err(EX_NOPERM, "-i interval too short"); 278 } 279 break; 280 case 'I': /* multicast interface */ 281 if (inet_aton(optarg, &ifaddr) == 0) 282 errx(EX_USAGE, 283 "invalid multicast interface: `%s'", 284 optarg); 285 options |= F_MIF; 286 break; 287 case 'l': 288 ultmp = strtoul(optarg, &ep, 0); 289 if (*ep || ep == optarg || ultmp > INT_MAX) 290 errx(EX_USAGE, 291 "invalid preload value: `%s'", optarg); 292 if (uid) { 293 errno = EPERM; 294 err(EX_NOPERM, "-l flag"); 295 } 296 preload = ultmp; 297 break; 298 case 'L': 299 options |= F_NOLOOP; 300 loop = 0; 301 break; 302 case 'm': /* TTL */ 303 ultmp = strtoul(optarg, &ep, 0); 304 if (*ep || ep == optarg || ultmp > 255) 305 errx(EX_USAGE, "invalid TTL: `%s'", optarg); 306 ttl = ultmp; 307 options |= F_TTL; 308 break; 309 case 'n': 310 options |= F_NUMERIC; 311 break; 312 case 'p': /* fill buffer with user pattern */ 313 options |= F_PINGFILLED; 314 fill((char *)datap, optarg); 315 break; 316 case 'Q': 317 options |= F_QUIET2; 318 break; 319 case 'q': 320 options |= F_QUIET; 321 break; 322 case 'R': 323 options |= F_RROUTE; 324 break; 325 case 'r': 326 options |= F_SO_DONTROUTE; 327 break; 328 case 's': /* size of packet to send */ 329 if (uid) { 330 errno = EPERM; 331 err(EX_NOPERM, "-s flag"); 332 } 333 ultmp = strtoul(optarg, &ep, 0); 334 if (ultmp > MAXPAYLOAD) 335 errx(EX_USAGE, 336 "packet size too large: %lu > %u", 337 ultmp, MAXPAYLOAD); 338 if (*ep || ep == optarg) 339 errx(EX_USAGE, "invalid packet size: `%s'", 340 optarg); 341 datalen = ultmp; 342 break; 343 case 'S': 344 source = optarg; 345 break; 346 case 't': 347 alarmtimeout = strtoul(optarg, &ep, 0); 348 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 349 errx(EX_USAGE, "invalid timeout: `%s'", 350 optarg); 351 if (alarmtimeout > MAXALARM) 352 errx(EX_USAGE, "invalid timeout: `%s' > %d", 353 optarg, MAXALARM); 354 alarm((int)alarmtimeout); 355 break; 356 case 'T': /* multicast TTL */ 357 ultmp = strtoul(optarg, &ep, 0); 358 if (*ep || ep == optarg || ultmp > 255) 359 errx(EX_USAGE, "invalid multicast TTL: `%s'", 360 optarg); 361 mttl = ultmp; 362 options |= F_MTTL; 363 break; 364 case 'v': 365 options |= F_VERBOSE; 366 break; 367 #ifdef IPSEC 368 #ifdef IPSEC_POLICY_IPSEC 369 case 'P': 370 options |= F_POLICY; 371 if (!strncmp("in", optarg, 2)) 372 policy_in = strdup(optarg); 373 else if (!strncmp("out", optarg, 3)) 374 policy_out = strdup(optarg); 375 else 376 errx(1, "invalid security policy"); 377 break; 378 #endif /*IPSEC_POLICY_IPSEC*/ 379 #endif /*IPSEC*/ 380 default: 381 usage(); 382 } 383 } 384 385 if (argc - optind != 1) 386 usage(); 387 target = argv[optind]; 388 389 if (source) { 390 bzero((char *)&sin, sizeof(sin)); 391 sin.sin_family = AF_INET; 392 if (inet_aton(source, &sin.sin_addr) != 0) { 393 shostname = source; 394 } else { 395 hp = gethostbyname2(source, AF_INET); 396 if (!hp) 397 errx(EX_NOHOST, "cannot resolve %s: %s", 398 source, hstrerror(h_errno)); 399 400 sin.sin_len = sizeof sin; 401 if (hp->h_length > sizeof(sin.sin_addr) || 402 hp->h_length < 0) 403 errx(1, "gethostbyname2: illegal address"); 404 memcpy(&sin.sin_addr, hp->h_addr_list[0], 405 sizeof(sin.sin_addr)); 406 strncpy(snamebuf, hp->h_name, 407 sizeof(snamebuf) - 1); 408 snamebuf[sizeof(snamebuf) - 1] = '\0'; 409 shostname = snamebuf; 410 } 411 if (bind(s, (struct sockaddr *)&sin, sizeof sin) == -1) 412 err(1, "bind"); 413 } 414 415 bzero(&whereto, sizeof(whereto)); 416 to = &whereto; 417 to->sin_family = AF_INET; 418 to->sin_len = sizeof *to; 419 if (inet_aton(target, &to->sin_addr) != 0) { 420 hostname = target; 421 } else { 422 hp = gethostbyname2(target, AF_INET); 423 if (!hp) 424 errx(EX_NOHOST, "cannot resolve %s: %s", 425 target, hstrerror(h_errno)); 426 427 if (hp->h_length > sizeof(to->sin_addr)) 428 errx(1, "gethostbyname2 returned an illegal address"); 429 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr); 430 strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1); 431 hnamebuf[sizeof(hnamebuf) - 1] = '\0'; 432 hostname = hnamebuf; 433 } 434 435 if (options & F_FLOOD && options & F_INTERVAL) 436 errx(EX_USAGE, "-f and -i: incompatible options"); 437 438 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 439 errx(EX_USAGE, 440 "-f flag cannot be used with multicast destination"); 441 if (options & (F_MIF | F_NOLOOP | F_MTTL) 442 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 443 errx(EX_USAGE, 444 "-I, -L, -T flags cannot be used with unicast destination"); 445 446 if (datalen >= PHDR_LEN) /* can we time transfer */ 447 timing = 1; 448 packlen = MAXIPLEN + MAXICMPLEN + datalen; 449 packlen = packlen > IP_MAXPACKET ? IP_MAXPACKET : packlen; 450 451 if (!(options & F_PINGFILLED)) 452 for (i = PHDR_LEN; i < datalen; ++i) 453 *datap++ = i; 454 455 ident = getpid() & 0xFFFF; 456 457 if (s < 0) { 458 errno = sockerrno; 459 err(EX_OSERR, "socket"); 460 } 461 hold = 1; 462 if (options & F_SO_DEBUG) 463 setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold, 464 sizeof(hold)); 465 if (options & F_SO_DONTROUTE) 466 setsockopt(s, SOL_SOCKET, SO_DONTROUTE, (char *)&hold, 467 sizeof(hold)); 468 #ifdef IPSEC 469 #ifdef IPSEC_POLICY_IPSEC 470 if (options & F_POLICY) { 471 char *buf; 472 if (policy_in != NULL) { 473 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 474 if (buf == NULL) 475 errx(EX_CONFIG, "%s", ipsec_strerror()); 476 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 477 buf, ipsec_get_policylen(buf)) < 0) 478 err(EX_CONFIG, 479 "ipsec policy cannot be configured"); 480 free(buf); 481 } 482 483 if (policy_out != NULL) { 484 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 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 #endif /*IPSEC_POLICY_IPSEC*/ 495 #endif /*IPSEC*/ 496 497 /* record route option */ 498 if (options & F_RROUTE) { 499 #ifdef IP_OPTIONS 500 bzero(rspace, sizeof(rspace)); 501 rspace[IPOPT_OPTVAL] = IPOPT_RR; 502 rspace[IPOPT_OLEN] = sizeof(rspace) - 1; 503 rspace[IPOPT_OFFSET] = IPOPT_MINOFF; 504 rspace[sizeof(rspace) - 1] = IPOPT_EOL; 505 if (setsockopt(s, IPPROTO_IP, IP_OPTIONS, rspace, 506 sizeof(rspace)) < 0) 507 err(EX_OSERR, "setsockopt IP_OPTIONS"); 508 #else 509 errx(EX_UNAVAILABLE, 510 "record route not available in this implementation"); 511 #endif /* IP_OPTIONS */ 512 } 513 514 if (options & F_TTL) { 515 if (setsockopt(s, IPPROTO_IP, IP_TTL, &ttl, 516 sizeof(ttl)) < 0) { 517 err(EX_OSERR, "setsockopt IP_TTL"); 518 } 519 } 520 if (options & F_NOLOOP) { 521 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, 522 sizeof(loop)) < 0) { 523 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP"); 524 } 525 } 526 if (options & F_MTTL) { 527 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &mttl, 528 sizeof(mttl)) < 0) { 529 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL"); 530 } 531 } 532 if (options & F_MIF) { 533 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr, 534 sizeof(ifaddr)) < 0) { 535 err(EX_OSERR, "setsockopt IP_MULTICAST_IF"); 536 } 537 } 538 #ifdef SO_TIMESTAMP 539 { int on = 1; 540 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)) < 0) 541 err(EX_OSERR, "setsockopt SO_TIMESTAMP"); 542 } 543 #endif 544 545 /* 546 * When pinging the broadcast address, you can get a lot of answers. 547 * Doing something so evil is useful if you are trying to stress the 548 * ethernet, or just want to fill the arp cache to get some stuff for 549 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast 550 * or multicast pings if they wish. 551 */ 552 553 /* 554 * XXX receive buffer needs undetermined space for mbuf overhead 555 * as well. 556 */ 557 hold = IP_MAXPACKET + 128; 558 setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, sizeof(hold)); 559 560 if (!uid) { 561 setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char *)&hold, 562 sizeof(hold)); 563 } 564 565 if (to->sin_family == AF_INET) { 566 printf("PING %s (%s)", hostname, inet_ntoa(to->sin_addr)); 567 if (source) 568 printf(" from %s", shostname); 569 printf(": %d data bytes\n", datalen); 570 } else 571 printf("PING %s: %d data bytes\n", hostname, datalen); 572 573 /* 574 * Use sigaction() instead of signal() to get unambiguous semantics, 575 * in particular with SA_RESTART not set. 576 */ 577 578 sigemptyset(&si_sa.sa_mask); 579 si_sa.sa_flags = 0; 580 581 si_sa.sa_handler = stopit; 582 if (sigaction(SIGINT, &si_sa, 0) == -1) { 583 err(EX_OSERR, "sigaction SIGINT"); 584 } 585 586 si_sa.sa_handler = status; 587 if (sigaction(SIGINFO, &si_sa, 0) == -1) { 588 err(EX_OSERR, "sigaction"); 589 } 590 591 if (alarmtimeout > 0) { 592 si_sa.sa_handler = stopit; 593 if (sigaction(SIGALRM, &si_sa, 0) == -1) 594 err(EX_OSERR, "sigaction SIGALRM"); 595 } 596 597 bzero(&msg, sizeof(msg)); 598 msg.msg_name = (caddr_t)&from; 599 msg.msg_iov = &iov; 600 msg.msg_iovlen = 1; 601 #ifdef SO_TIMESTAMP 602 msg.msg_control = (caddr_t)ctrl; 603 #endif 604 iov.iov_base = packet; 605 iov.iov_len = packlen; 606 607 if (tcgetattr(STDOUT_FILENO, &ts) != -1) { 608 reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 609 ts.c_lflag |= NOKERNINFO; 610 tcsetattr(STDOUT_FILENO, TCSANOW, &ts); 611 } 612 613 if (preload == 0) 614 pinger(); /* send the first ping */ 615 else { 616 if (npackets != 0 && preload > npackets) 617 preload = npackets; 618 while (preload--) /* fire off them quickies */ 619 pinger(); 620 } 621 gettimeofday(&last, NULL); 622 623 if (options & F_FLOOD) { 624 intvl.tv_sec = 0; 625 intvl.tv_usec = 10000; 626 } else { 627 intvl.tv_sec = interval / 1000; 628 intvl.tv_usec = interval % 1000 * 1000; 629 } 630 631 while (!finish_up) { 632 int cc; 633 int n; 634 struct timeval timeout, now; 635 fd_set rfds; 636 637 check_status(); 638 if (s >= FD_SETSIZE) 639 errx(EX_OSERR, "descriptor too large"); 640 FD_ZERO(&rfds); 641 FD_SET(s, &rfds); 642 gettimeofday(&now, NULL); 643 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec; 644 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec; 645 while (timeout.tv_usec < 0) { 646 timeout.tv_usec += 1000000; 647 timeout.tv_sec--; 648 } 649 while (timeout.tv_usec >= 1000000) { 650 timeout.tv_usec -= 1000000; 651 timeout.tv_sec++; 652 } 653 if (timeout.tv_sec < 0) 654 timeout.tv_sec = timeout.tv_usec = 0; 655 n = select(s + 1, &rfds, NULL, NULL, &timeout); 656 if (n < 0) 657 continue; /* Must be EINTR. */ 658 if (n == 1) { 659 struct timeval *t = 0; 660 #ifdef SO_TIMESTAMP 661 struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl; 662 663 msg.msg_controllen = sizeof(ctrl); 664 #endif 665 msg.msg_namelen = sizeof(from); 666 if ((cc = recvmsg(s, &msg, 0)) < 0) { 667 if (errno == EINTR) 668 continue; 669 warn("recvmsg"); 670 continue; 671 } 672 #ifdef SO_TIMESTAMP 673 if (cmsg->cmsg_level == SOL_SOCKET && 674 cmsg->cmsg_type == SCM_TIMESTAMP && 675 cmsg->cmsg_len == CMSG_LEN(sizeof *t)) { 676 /* Copy to avoid alignment problems: */ 677 memcpy(&now,CMSG_DATA(cmsg),sizeof(now)); 678 t = &now; 679 } 680 #endif 681 if (t == 0) { 682 gettimeofday(&now, NULL); 683 t = &now; 684 } 685 pr_pack((char *)packet, cc, &from, t); 686 if (npackets && nreceived >= npackets) 687 break; 688 } 689 if (n == 0 || options & F_FLOOD) { 690 if (!npackets || ntransmitted < npackets) 691 pinger(); 692 else { 693 if (almost_done) 694 break; 695 almost_done = 1; 696 intvl.tv_usec = 0; 697 if (nreceived) { 698 intvl.tv_sec = 2 * tmax / 1000; 699 if (!intvl.tv_sec) 700 intvl.tv_sec = 1; 701 } else 702 intvl.tv_sec = MAXWAIT; 703 } 704 gettimeofday(&last, NULL); 705 706 if (ntransmitted - nreceived - 1 > nmissedmax) { 707 nmissedmax = ntransmitted - nreceived - 1; 708 if (options & F_MISSED) 709 write(STDOUT_FILENO, &BBELL, 1); 710 } 711 } 712 } 713 finish(); 714 /* NOTREACHED */ 715 exit(0); /* Make the compiler happy */ 716 } 717 718 /* 719 * stopit -- 720 * Set the global bit that causes the main loop to quit. 721 * Do NOT call finish() from here, since finish() does far too much 722 * to be called from a signal handler. 723 */ 724 void 725 stopit(int sig __unused) 726 { 727 728 finish_up = 1; 729 } 730 731 /* 732 * pinger -- 733 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 734 * will be added on by the kernel. The ID field is our UNIX process ID, 735 * and the sequence number is an ascending integer. The first PHDR_LEN 736 * bytes of the data portion are used to hold a UNIX "timeval" struct in 737 * host byte-order, to compute the round-trip time. 738 */ 739 static void 740 pinger(void) 741 { 742 struct icmp *icp; 743 int cc, i; 744 745 icp = (struct icmp *)outpack; 746 icp->icmp_type = ICMP_ECHO; 747 icp->icmp_code = 0; 748 icp->icmp_cksum = 0; 749 icp->icmp_seq = ntransmitted; 750 icp->icmp_id = ident; /* ID */ 751 752 CLR(icp->icmp_seq % mx_dup_ck); 753 754 if (timing) 755 gettimeofday((struct timeval *)&outpack[MINICMPLEN], 756 (struct timezone *)NULL); 757 758 cc = MINICMPLEN + datalen; 759 760 /* compute ICMP checksum here */ 761 icp->icmp_cksum = in_cksum((u_short *)icp, cc); 762 763 i = sendto(s, (char *)outpack, cc, 0, (struct sockaddr *)&whereto, 764 sizeof(whereto)); 765 766 if (i < 0 || i != cc) { 767 if (i < 0) { 768 if (options & F_FLOOD && errno == ENOBUFS) { 769 usleep(FLOOD_BACKOFF); 770 return; 771 } 772 warn("sendto"); 773 } else { 774 warn("%s: partial write: %d of %d bytes", 775 hostname, i, cc); 776 } 777 } 778 ntransmitted++; 779 if (!(options & F_QUIET) && options & F_FLOOD) 780 write(STDOUT_FILENO, &DOT, 1); 781 } 782 783 /* 784 * pr_pack -- 785 * Print out the packet, if it came from us. This logic is necessary 786 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 787 * which arrive ('tis only fair). This permits multiple copies of this 788 * program to be run without having intermingled output (or statistics!). 789 */ 790 static void 791 pr_pack(char *buf, int cc, struct sockaddr_in *from, struct timeval *tv) 792 { 793 struct icmp *icp; 794 struct ip *ip; 795 struct in_addr ina; 796 struct timeval *tp; 797 u_char *cp, *dp; 798 double triptime; 799 int dupflag, hlen, i, j; 800 static int old_rrlen; 801 static char old_rr[MAX_IPOPTLEN]; 802 803 /* Check the IP header */ 804 ip = (struct ip *)buf; 805 hlen = ip->ip_hl << 2; 806 if (cc < hlen + ICMP_MINLEN) { 807 if (options & F_VERBOSE) 808 warn("packet too short (%d bytes) from %s", cc, 809 inet_ntoa(from->sin_addr)); 810 return; 811 } 812 813 /* Now the ICMP part */ 814 cc -= hlen; 815 icp = (struct icmp *)(buf + hlen); 816 if (icp->icmp_type == ICMP_ECHOREPLY) { 817 if (icp->icmp_id != ident) 818 return; /* 'Twas not our ECHO */ 819 ++nreceived; 820 triptime = 0.0; 821 if (timing) { 822 struct timeval tv1; 823 #ifndef icmp_data 824 tp = (struct timeval *)&icp->icmp_ip; 825 #else 826 tp = (struct timeval *)icp->icmp_data; 827 #endif 828 /* Avoid unaligned data: */ 829 memcpy(&tv1,tp,sizeof(tv1)); 830 tvsub(tv, &tv1); 831 triptime = ((double)tv->tv_sec) * 1000.0 + 832 ((double)tv->tv_usec) / 1000.0; 833 tsum += triptime; 834 tsumsq += triptime * triptime; 835 if (triptime < tmin) 836 tmin = triptime; 837 if (triptime > tmax) 838 tmax = triptime; 839 } 840 841 if (TST(icp->icmp_seq % mx_dup_ck)) { 842 ++nrepeats; 843 --nreceived; 844 dupflag = 1; 845 } else { 846 SET(icp->icmp_seq % mx_dup_ck); 847 dupflag = 0; 848 } 849 850 if (options & F_QUIET) 851 return; 852 853 if (options & F_FLOOD) 854 write(STDOUT_FILENO, &BSPACE, 1); 855 else { 856 printf("%d bytes from %s: icmp_seq=%u", cc, 857 inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr), 858 icp->icmp_seq); 859 printf(" ttl=%d", ip->ip_ttl); 860 if (timing) 861 printf(" time=%.3f ms", triptime); 862 if (dupflag) 863 printf(" (DUP!)"); 864 if (options & F_AUDIBLE) 865 write(STDOUT_FILENO, &BBELL, 1); 866 /* check the data */ 867 cp = (u_char*)&icp->icmp_data[PHDR_LEN]; 868 dp = &outpack[MINICMPLEN + PHDR_LEN]; 869 for (i = PHDR_LEN; i < datalen; ++i, ++cp, ++dp) { 870 if (*cp != *dp) { 871 printf("\nwrong data byte #%d should be 0x%x but was 0x%x", 872 i, *dp, *cp); 873 printf("\ncp:"); 874 cp = (u_char*)&icp->icmp_data[0]; 875 for (i = 0; i < datalen; ++i, ++cp) { 876 if ((i % 32) == 8) 877 printf("\n\t"); 878 printf("%x ", *cp); 879 } 880 printf("\ndp:"); 881 cp = &outpack[MINICMPLEN]; 882 for (i = 0; i < datalen; ++i, ++cp) { 883 if ((i % 32) == 8) 884 printf("\n\t"); 885 printf("%x ", *cp); 886 } 887 break; 888 } 889 } 890 } 891 } else { 892 /* 893 * We've got something other than an ECHOREPLY. 894 * See if it's a reply to something that we sent. 895 * We can compare IP destination, protocol, 896 * and ICMP type and ID. 897 * 898 * Only print all the error messages if we are running 899 * as root to avoid leaking information not normally 900 * available to those not running as root. 901 */ 902 #ifndef icmp_data 903 struct ip *oip = &icp->icmp_ip; 904 #else 905 struct ip *oip = (struct ip *)icp->icmp_data; 906 #endif 907 struct icmp *oicmp = (struct icmp *)(oip + 1); 908 909 if (((options & F_VERBOSE) && uid == 0) || 910 (!(options & F_QUIET2) && 911 (oip->ip_dst.s_addr == whereto.sin_addr.s_addr) && 912 (oip->ip_p == IPPROTO_ICMP) && 913 (oicmp->icmp_type == ICMP_ECHO) && 914 (oicmp->icmp_id == ident))) { 915 printf("%d bytes from %s: ", cc, 916 pr_addr(from->sin_addr)); 917 pr_icmph(icp); 918 } else 919 return; 920 } 921 922 /* Display any IP options */ 923 cp = (u_char *)buf + sizeof(struct ip); 924 925 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp) 926 switch (*cp) { 927 case IPOPT_EOL: 928 hlen = 0; 929 break; 930 case IPOPT_LSRR: 931 printf("\nLSRR: "); 932 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1; 933 hlen -= 2; 934 cp += 2; 935 if (j >= INADDR_LEN && 936 j <= hlen - (int)sizeof(struct ip)) { 937 for (;;) { 938 bcopy(++cp, &ina.s_addr, INADDR_LEN); 939 if (ina.s_addr == 0) 940 printf("\t0.0.0.0"); 941 else 942 printf("\t%s", pr_addr(ina)); 943 hlen -= INADDR_LEN; 944 cp += INADDR_LEN - 1; 945 j -= INADDR_LEN; 946 if (j < INADDR_LEN) 947 break; 948 putchar('\n'); 949 } 950 } else 951 printf("\t(truncated route)\n"); 952 break; 953 case IPOPT_RR: 954 j = cp[IPOPT_OLEN]; /* get length */ 955 i = cp[IPOPT_OFFSET]; /* and pointer */ 956 hlen -= 2; 957 cp += 2; 958 if (i > j) 959 i = j; 960 i = i - IPOPT_MINOFF + 1; 961 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) { 962 old_rrlen = 0; 963 continue; 964 } 965 if (i == old_rrlen 966 && !bcmp((char *)cp, old_rr, i) 967 && !(options & F_FLOOD)) { 968 printf("\t(same route)"); 969 hlen -= i; 970 cp += i; 971 break; 972 } 973 old_rrlen = i; 974 bcopy((char *)cp, old_rr, i); 975 976 printf("\nRR: "); 977 978 if (i >= INADDR_LEN && 979 i <= hlen - (int)sizeof(struct ip)) { 980 for (;;) { 981 bcopy(++cp, &ina.s_addr, INADDR_LEN); 982 if (ina.s_addr == 0) 983 printf("\t0.0.0.0"); 984 else 985 printf("\t%s", pr_addr(ina)); 986 hlen -= INADDR_LEN; 987 cp += INADDR_LEN - 1; 988 i -= INADDR_LEN; 989 if (i < INADDR_LEN) 990 break; 991 putchar('\n'); 992 } 993 } else 994 printf("\t(truncated route)"); 995 break; 996 case IPOPT_NOP: 997 printf("\nNOP"); 998 break; 999 default: 1000 printf("\nunknown option %x", *cp); 1001 break; 1002 } 1003 if (!(options & F_FLOOD)) { 1004 putchar('\n'); 1005 fflush(stdout); 1006 } 1007 } 1008 1009 /* 1010 * in_cksum -- 1011 * Checksum routine for Internet Protocol family headers (C Version) 1012 */ 1013 u_short 1014 in_cksum(u_short *addr, int len) 1015 { 1016 int nleft, sum; 1017 u_short *w; 1018 union { 1019 u_short us; 1020 u_char uc[2]; 1021 } last; 1022 u_short answer; 1023 1024 nleft = len; 1025 sum = 0; 1026 w = addr; 1027 1028 /* 1029 * Our algorithm is simple, using a 32 bit accumulator (sum), we add 1030 * sequential 16 bit words to it, and at the end, fold back all the 1031 * carry bits from the top 16 bits into the lower 16 bits. 1032 */ 1033 while (nleft > 1) { 1034 sum += *w++; 1035 nleft -= 2; 1036 } 1037 1038 /* mop up an odd byte, if necessary */ 1039 if (nleft == 1) { 1040 last.uc[0] = *(u_char *)w; 1041 last.uc[1] = 0; 1042 sum += last.us; 1043 } 1044 1045 /* add back carry outs from top 16 bits to low 16 bits */ 1046 sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */ 1047 sum += (sum >> 16); /* add carry */ 1048 answer = ~sum; /* truncate to 16 bits */ 1049 return(answer); 1050 } 1051 1052 /* 1053 * tvsub -- 1054 * Subtract 2 timeval structs: out = out - in. Out is assumed to 1055 * be >= in. 1056 */ 1057 static void 1058 tvsub(struct timeval *out, struct timeval *in) 1059 { 1060 1061 if ((out->tv_usec -= in->tv_usec) < 0) { 1062 --out->tv_sec; 1063 out->tv_usec += 1000000; 1064 } 1065 out->tv_sec -= in->tv_sec; 1066 } 1067 1068 /* 1069 * status -- 1070 * Print out statistics when SIGINFO is received. 1071 */ 1072 1073 static void 1074 status(int sig __unused) 1075 { 1076 1077 siginfo_p = 1; 1078 } 1079 1080 static void 1081 check_status(void) 1082 { 1083 1084 if (siginfo_p) { 1085 siginfo_p = 0; 1086 fprintf(stderr, 1087 "\r%ld/%ld packets received (%.0f%%) %.3f min / %.3f avg / %.3f max\n", 1088 nreceived, ntransmitted, 1089 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0, 1090 nreceived ? tmin : 0.0, 1091 nreceived + nrepeats ? tsum / (nreceived + nrepeats) : tsum, 1092 tmax); 1093 } 1094 } 1095 1096 /* 1097 * finish -- 1098 * Print out statistics, and give up. 1099 */ 1100 static void 1101 finish(void) 1102 { 1103 1104 struct termios ts; 1105 1106 signal(SIGINT, SIG_IGN); 1107 signal(SIGALRM, SIG_IGN); 1108 putchar('\n'); 1109 fflush(stdout); 1110 printf("--- %s ping statistics ---\n", hostname); 1111 printf("%ld packets transmitted, ", ntransmitted); 1112 printf("%ld packets received, ", nreceived); 1113 if (nrepeats) 1114 printf("+%ld duplicates, ", nrepeats); 1115 if (ntransmitted) { 1116 if (nreceived > ntransmitted) 1117 printf("-- somebody's printing up packets!"); 1118 else 1119 printf("%d%% packet loss", 1120 (int)(((ntransmitted - nreceived) * 100) / 1121 ntransmitted)); 1122 } 1123 putchar('\n'); 1124 if (nreceived && timing) { 1125 double n = nreceived + nrepeats; 1126 double avg = tsum / n; 1127 double vari = tsumsq / n - avg * avg; 1128 printf( 1129 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", 1130 tmin, avg, tmax, sqrt(vari)); 1131 } 1132 if (reset_kerninfo && tcgetattr(STDOUT_FILENO, &ts) != -1) { 1133 ts.c_lflag &= ~NOKERNINFO; 1134 tcsetattr(STDOUT_FILENO, TCSANOW, &ts); 1135 } 1136 1137 if (nreceived) 1138 exit(0); 1139 else 1140 exit(2); 1141 } 1142 1143 #ifdef notdef 1144 static char *ttab[] = { 1145 "Echo Reply", /* ip + seq + udata */ 1146 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */ 1147 "Source Quench", /* IP */ 1148 "Redirect", /* redirect type, gateway, + IP */ 1149 "Echo", 1150 "Time Exceeded", /* transit, frag reassem + IP */ 1151 "Parameter Problem", /* pointer + IP */ 1152 "Timestamp", /* id + seq + three timestamps */ 1153 "Timestamp Reply", /* " */ 1154 "Info Request", /* id + sq */ 1155 "Info Reply" /* " */ 1156 }; 1157 #endif 1158 1159 /* 1160 * pr_icmph -- 1161 * Print a descriptive string about an ICMP header. 1162 */ 1163 static void 1164 pr_icmph(struct icmp *icp) 1165 { 1166 1167 switch(icp->icmp_type) { 1168 case ICMP_ECHOREPLY: 1169 printf("Echo Reply\n"); 1170 /* XXX ID + Seq + Data */ 1171 break; 1172 case ICMP_UNREACH: 1173 switch(icp->icmp_code) { 1174 case ICMP_UNREACH_NET: 1175 printf("Destination Net Unreachable\n"); 1176 break; 1177 case ICMP_UNREACH_HOST: 1178 printf("Destination Host Unreachable\n"); 1179 break; 1180 case ICMP_UNREACH_PROTOCOL: 1181 printf("Destination Protocol Unreachable\n"); 1182 break; 1183 case ICMP_UNREACH_PORT: 1184 printf("Destination Port Unreachable\n"); 1185 break; 1186 case ICMP_UNREACH_NEEDFRAG: 1187 printf("frag needed and DF set (MTU %d)\n", 1188 ntohs(icp->icmp_nextmtu)); 1189 break; 1190 case ICMP_UNREACH_SRCFAIL: 1191 printf("Source Route Failed\n"); 1192 break; 1193 case ICMP_UNREACH_FILTER_PROHIB: 1194 printf("Communication prohibited by filter\n"); 1195 break; 1196 default: 1197 printf("Dest Unreachable, Bad Code: %d\n", 1198 icp->icmp_code); 1199 break; 1200 } 1201 /* Print returned IP header information */ 1202 #ifndef icmp_data 1203 pr_retip(&icp->icmp_ip); 1204 #else 1205 pr_retip((struct ip *)icp->icmp_data); 1206 #endif 1207 break; 1208 case ICMP_SOURCEQUENCH: 1209 printf("Source Quench\n"); 1210 #ifndef icmp_data 1211 pr_retip(&icp->icmp_ip); 1212 #else 1213 pr_retip((struct ip *)icp->icmp_data); 1214 #endif 1215 break; 1216 case ICMP_REDIRECT: 1217 switch(icp->icmp_code) { 1218 case ICMP_REDIRECT_NET: 1219 printf("Redirect Network"); 1220 break; 1221 case ICMP_REDIRECT_HOST: 1222 printf("Redirect Host"); 1223 break; 1224 case ICMP_REDIRECT_TOSNET: 1225 printf("Redirect Type of Service and Network"); 1226 break; 1227 case ICMP_REDIRECT_TOSHOST: 1228 printf("Redirect Type of Service and Host"); 1229 break; 1230 default: 1231 printf("Redirect, Bad Code: %d", icp->icmp_code); 1232 break; 1233 } 1234 printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr)); 1235 #ifndef icmp_data 1236 pr_retip(&icp->icmp_ip); 1237 #else 1238 pr_retip((struct ip *)icp->icmp_data); 1239 #endif 1240 break; 1241 case ICMP_ECHO: 1242 printf("Echo Request\n"); 1243 /* XXX ID + Seq + Data */ 1244 break; 1245 case ICMP_TIMXCEED: 1246 switch(icp->icmp_code) { 1247 case ICMP_TIMXCEED_INTRANS: 1248 printf("Time to live exceeded\n"); 1249 break; 1250 case ICMP_TIMXCEED_REASS: 1251 printf("Frag reassembly time exceeded\n"); 1252 break; 1253 default: 1254 printf("Time exceeded, Bad Code: %d\n", 1255 icp->icmp_code); 1256 break; 1257 } 1258 #ifndef icmp_data 1259 pr_retip(&icp->icmp_ip); 1260 #else 1261 pr_retip((struct ip *)icp->icmp_data); 1262 #endif 1263 break; 1264 case ICMP_PARAMPROB: 1265 printf("Parameter problem: pointer = 0x%02x\n", 1266 icp->icmp_hun.ih_pptr); 1267 #ifndef icmp_data 1268 pr_retip(&icp->icmp_ip); 1269 #else 1270 pr_retip((struct ip *)icp->icmp_data); 1271 #endif 1272 break; 1273 case ICMP_TSTAMP: 1274 printf("Timestamp\n"); 1275 /* XXX ID + Seq + 3 timestamps */ 1276 break; 1277 case ICMP_TSTAMPREPLY: 1278 printf("Timestamp Reply\n"); 1279 /* XXX ID + Seq + 3 timestamps */ 1280 break; 1281 case ICMP_IREQ: 1282 printf("Information Request\n"); 1283 /* XXX ID + Seq */ 1284 break; 1285 case ICMP_IREQREPLY: 1286 printf("Information Reply\n"); 1287 /* XXX ID + Seq */ 1288 break; 1289 case ICMP_MASKREQ: 1290 printf("Address Mask Request\n"); 1291 break; 1292 case ICMP_MASKREPLY: 1293 printf("Address Mask Reply\n"); 1294 break; 1295 case ICMP_ROUTERADVERT: 1296 printf("Router Advertisement\n"); 1297 break; 1298 case ICMP_ROUTERSOLICIT: 1299 printf("Router Solicitation\n"); 1300 break; 1301 default: 1302 printf("Bad ICMP type: %d\n", icp->icmp_type); 1303 } 1304 } 1305 1306 /* 1307 * pr_iph -- 1308 * Print an IP header with options. 1309 */ 1310 static void 1311 pr_iph(struct ip *ip) 1312 { 1313 u_char *cp; 1314 int hlen; 1315 1316 hlen = ip->ip_hl << 2; 1317 cp = (u_char *)ip + 20; /* point to options */ 1318 1319 printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1320 printf(" %1x %1x %02x %04x %04x", 1321 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len), 1322 ntohs(ip->ip_id)); 1323 printf(" %1lx %04lx", 1324 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13, 1325 (u_long) ntohl(ip->ip_off) & 0x1fff); 1326 printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, ntohs(ip->ip_sum)); 1327 printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1328 printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1329 /* dump any option bytes */ 1330 while (hlen-- > 20) { 1331 printf("%02x", *cp++); 1332 } 1333 putchar('\n'); 1334 } 1335 1336 /* 1337 * pr_addr -- 1338 * Return an ascii host address as a dotted quad and optionally with 1339 * a hostname. 1340 */ 1341 static char * 1342 pr_addr(struct in_addr ina) 1343 { 1344 struct hostent *hp; 1345 static char buf[16 + 3 + MAXHOSTNAMELEN]; 1346 1347 if ((options & F_NUMERIC) || 1348 !(hp = gethostbyaddr((char *)&ina, 4, AF_INET))) 1349 return inet_ntoa(ina); 1350 else 1351 snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1352 inet_ntoa(ina)); 1353 return(buf); 1354 } 1355 1356 /* 1357 * pr_retip -- 1358 * Dump some info on a returned (via ICMP) IP packet. 1359 */ 1360 static void 1361 pr_retip(struct ip *ip) 1362 { 1363 u_char *cp; 1364 int hlen; 1365 1366 pr_iph(ip); 1367 hlen = ip->ip_hl << 2; 1368 cp = (u_char *)ip + hlen; 1369 1370 if (ip->ip_p == 6) 1371 printf("TCP: from port %u, to port %u (decimal)\n", 1372 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1373 else if (ip->ip_p == 17) 1374 printf("UDP: from port %u, to port %u (decimal)\n", 1375 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1376 } 1377 1378 static void 1379 fill(char *bp, char *patp) 1380 { 1381 char *cp; 1382 int pat[16]; 1383 u_int ii, jj, kk; 1384 1385 for (cp = patp; *cp; cp++) { 1386 if (!isxdigit(*cp)) 1387 errx(EX_USAGE, 1388 "patterns must be specified as hex digits"); 1389 1390 } 1391 ii = sscanf(patp, 1392 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1393 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 1394 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 1395 &pat[13], &pat[14], &pat[15]); 1396 1397 if (ii > 0) 1398 for (kk = 0; kk <= MAXPAYLOAD - (PHDR_LEN + ii); kk += ii) 1399 for (jj = 0; jj < ii; ++jj) 1400 bp[jj + kk] = pat[jj]; 1401 if (!(options & F_QUIET)) { 1402 printf("PATTERN: 0x"); 1403 for (jj = 0; jj < ii; ++jj) 1404 printf("%02x", bp[jj] & 0xFF); 1405 printf("\n"); 1406 } 1407 } 1408 1409 static void 1410 usage(void) 1411 { 1412 fprintf(stderr, "%s\n%s\n%s\n", 1413 "usage: ping [-AQRadfnqrv] [-c count] [-i wait] [-l preload] [-m ttl]", 1414 " [-p pattern] " 1415 #ifdef IPSEC 1416 #ifdef IPSEC_POLICY_IPSEC 1417 "[-P policy] " 1418 #endif 1419 #endif 1420 "[-s packetsize] [-S src_addr] [-t timeout]", 1421 " [host | [-L] [-I iface] [-T ttl] mcast-group]"); 1422 exit(EX_USAGE); 1423 } 1424