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 PHDR_LEN sizeof(struct timeval) 100 #define DEFDATALEN (64 - PHDR_LEN) /* default data length */ 101 #define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */ 102 /* runs out of buffer space */ 103 #define MAXIPLEN 60 104 #define MAXICMPLEN 76 105 #define MAXPACKET (65536 - 60 - 8)/* max packet size */ 106 #define MAXWAIT 10 /* max seconds to wait for response */ 107 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */ 108 #define NROUTES 9 /* number of record route slots */ 109 110 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 111 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 112 #define SET(bit) (A(bit) |= B(bit)) 113 #define CLR(bit) (A(bit) &= (~B(bit))) 114 #define TST(bit) (A(bit) & B(bit)) 115 116 /* various options */ 117 int options; 118 #define F_FLOOD 0x0001 119 #define F_INTERVAL 0x0002 120 #define F_NUMERIC 0x0004 121 #define F_PINGFILLED 0x0008 122 #define F_QUIET 0x0010 123 #define F_RROUTE 0x0020 124 #define F_SO_DEBUG 0x0040 125 #define F_SO_DONTROUTE 0x0080 126 #define F_VERBOSE 0x0100 127 #define F_QUIET2 0x0200 128 #define F_NOLOOP 0x0400 129 #define F_MTTL 0x0800 130 #define F_MIF 0x1000 131 #define F_AUDIBLE 0x2000 132 #ifdef IPSEC 133 #ifdef IPSEC_POLICY_IPSEC 134 #define F_POLICY 0x4000 135 #endif /*IPSEC_POLICY_IPSEC*/ 136 #endif /*IPSEC*/ 137 #define F_TTL 0x8000 138 #define F_MISSED 0x10000 139 140 /* 141 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 142 * number of received sequence numbers we can keep track of. Change 128 143 * to 8192 for complete accuracy... 144 */ 145 #define MAX_DUP_CHK (8 * 128) 146 int mx_dup_ck = MAX_DUP_CHK; 147 char rcvd_tbl[MAX_DUP_CHK / 8]; 148 149 struct sockaddr whereto; /* who to ping */ 150 int datalen = DEFDATALEN; 151 int s; /* socket file descriptor */ 152 u_char outpack[MAXPACKET]; 153 char BSPACE = '\b'; /* characters written for flood */ 154 char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */ 155 char DOT = '.'; 156 char *hostname; 157 char *shostname; 158 int ident; /* process id to identify our packets */ 159 int uid; /* cached uid for micro-optimization */ 160 161 /* counters */ 162 long npackets; /* max packets to transmit */ 163 long nreceived; /* # of packets we got back */ 164 long nrepeats; /* number of duplicates */ 165 long ntransmitted; /* sequence # for outbound packets = #sent */ 166 int interval = 1000; /* interval between packets, ms */ 167 168 /* timing */ 169 int timing; /* flag to do timing */ 170 double tmin = 999999999.0; /* minimum round trip time */ 171 double tmax = 0.0; /* maximum round trip time */ 172 double tsum = 0.0; /* sum of all times, for doing average */ 173 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 174 175 volatile sig_atomic_t finish_up; /* nonzero if we've been told to finish up */ 176 int reset_kerninfo; 177 volatile sig_atomic_t siginfo_p; 178 179 static void fill(char *, char *); 180 static u_short in_cksum(u_short *, int); 181 static void check_status(void); 182 static void finish(void) __dead2; 183 static void pinger(void); 184 static char *pr_addr(struct in_addr); 185 static void pr_icmph(struct icmp *); 186 static void pr_iph(struct ip *); 187 static void pr_pack(char *, int, struct sockaddr_in *, struct timeval *); 188 static void pr_retip(struct ip *); 189 static void status(int); 190 static void stopit(int); 191 static void tvsub(struct timeval *, struct timeval *); 192 static void usage(void) __dead2; 193 194 int 195 main(argc, argv) 196 int argc; 197 char *const *argv; 198 { 199 struct timeval last, intvl; 200 struct hostent *hp; 201 struct sockaddr_in *to, sin; 202 struct termios ts; 203 register int i; 204 int ch, hold, packlen, preload, sockerrno, almost_done = 0, ttl; 205 struct in_addr ifaddr; 206 unsigned char mttl, loop; 207 u_char *datap, *packet; 208 char *source = NULL, *target, hnamebuf[MAXHOSTNAMELEN]; 209 char snamebuf[MAXHOSTNAMELEN]; 210 char *ep; 211 u_long ultmp; 212 #ifdef IP_OPTIONS 213 char rspace[3 + 4 * NROUTES + 1]; /* record route space */ 214 #endif 215 struct sigaction si_sa; 216 struct iovec iov; 217 struct msghdr msg; 218 struct sockaddr_in from; 219 char ctrl[CMSG_SPACE(sizeof(struct timeval))]; 220 #ifdef IPSEC_POLICY_IPSEC 221 char *policy_in = NULL; 222 char *policy_out = NULL; 223 #endif 224 unsigned long alarmtimeout; 225 226 /* 227 * Do the stuff that we need root priv's for *first*, and 228 * then drop our setuid bit. Save error reporting for 229 * after arg parsing. 230 */ 231 s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 232 sockerrno = errno; 233 234 setuid(getuid()); 235 uid = getuid(); 236 237 alarmtimeout = preload = 0; 238 239 datap = &outpack[8 + PHDR_LEN]; 240 while ((ch = getopt(argc, argv, 241 "AI:LQRS:T:c:adfi:l:m:np:qrs:t:v" 242 #ifdef IPSEC 243 #ifdef IPSEC_POLICY_IPSEC 244 "P:" 245 #endif /*IPSEC_POLICY_IPSEC*/ 246 #endif /*IPSEC*/ 247 )) != -1) 248 { 249 switch(ch) { 250 case 'A': 251 options |= F_MISSED; 252 break; 253 case 'a': 254 options |= F_AUDIBLE; 255 break; 256 case 'c': 257 ultmp = strtoul(optarg, &ep, 0); 258 if (*ep || ep == optarg || ultmp > LONG_MAX || !ultmp) 259 errx(EX_USAGE, 260 "invalid count of packets to transmit: `%s'", 261 optarg); 262 npackets = ultmp; 263 break; 264 case 'd': 265 options |= F_SO_DEBUG; 266 break; 267 case 'f': 268 if (uid) { 269 errno = EPERM; 270 err(EX_NOPERM, "-f flag"); 271 } 272 options |= F_FLOOD; 273 setbuf(stdout, (char *)NULL); 274 break; 275 case 'i': /* wait between sending packets */ 276 { 277 double t = strtod(optarg, &ep) * 1000.0; 278 279 if (*ep || ep == optarg || t > (double)INT_MAX) { 280 errx( 281 EX_USAGE, 282 "invalid timing interval: `%s'", 283 optarg 284 ); 285 } 286 options |= F_INTERVAL; 287 interval = (int)t; 288 if (uid && interval < 1000) { 289 errno = EPERM; 290 err(EX_NOPERM, "-i interval too short"); 291 } 292 } 293 break; 294 case 'I': /* multicast interface */ 295 if (inet_aton(optarg, &ifaddr) == 0) 296 errx(EX_USAGE, 297 "invalid multicast interface: `%s'", 298 optarg); 299 options |= F_MIF; 300 break; 301 case 'l': 302 ultmp = strtoul(optarg, &ep, 0); 303 if (*ep || ep == optarg || ultmp > INT_MAX) 304 errx(EX_USAGE, 305 "invalid preload value: `%s'", optarg); 306 if (uid) { 307 errno = EPERM; 308 err(EX_NOPERM, "-l flag"); 309 } 310 preload = ultmp; 311 break; 312 case 'L': 313 options |= F_NOLOOP; 314 loop = 0; 315 break; 316 case 'm': /* TTL */ 317 ultmp = strtoul(optarg, &ep, 0); 318 if (*ep || ep == optarg || ultmp > 255) 319 errx(EX_USAGE, "invalid TTL: `%s'", 320 optarg); 321 ttl = ultmp; 322 options |= F_TTL; 323 break; 324 case 'n': 325 options |= F_NUMERIC; 326 break; 327 case 'p': /* fill buffer with user pattern */ 328 options |= F_PINGFILLED; 329 fill((char *)datap, optarg); 330 break; 331 case 'Q': 332 options |= F_QUIET2; 333 break; 334 case 'q': 335 options |= F_QUIET; 336 break; 337 case 'R': 338 options |= F_RROUTE; 339 break; 340 case 'r': 341 options |= F_SO_DONTROUTE; 342 break; 343 case 's': /* size of packet to send */ 344 if (uid) { 345 errno = EPERM; 346 err(EX_NOPERM, "-s flag"); 347 } 348 ultmp = strtoul(optarg, &ep, 0); 349 if (ultmp > MAXPACKET) 350 errx(EX_USAGE, "packet size too large: %lu", 351 ultmp); 352 if (*ep || ep == optarg || !ultmp) 353 errx(EX_USAGE, "invalid packet size: `%s'", 354 optarg); 355 datalen = ultmp; 356 break; 357 case 'S': 358 source = optarg; 359 break; 360 case 't': 361 alarmtimeout = strtoul(optarg, &ep, 0); 362 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 363 errx(EX_USAGE, "invalid timeout: `%s'", 364 optarg); 365 if (alarmtimeout > MAXALARM) 366 errx(EX_USAGE, "invalid timeout: `%s' > %d", 367 optarg, MAXALARM); 368 alarm((int)alarmtimeout); 369 break; 370 case 'T': /* multicast TTL */ 371 ultmp = strtoul(optarg, &ep, 0); 372 if (*ep || ep == optarg || ultmp > 255) 373 errx(EX_USAGE, "invalid multicast TTL: `%s'", 374 optarg); 375 mttl = ultmp; 376 options |= F_MTTL; 377 break; 378 case 'v': 379 options |= F_VERBOSE; 380 break; 381 #ifdef IPSEC 382 #ifdef IPSEC_POLICY_IPSEC 383 case 'P': 384 options |= F_POLICY; 385 if (!strncmp("in", optarg, 2)) 386 policy_in = strdup(optarg); 387 else if (!strncmp("out", optarg, 3)) 388 policy_out = strdup(optarg); 389 else 390 errx(1, "invalid security policy"); 391 break; 392 #endif /*IPSEC_POLICY_IPSEC*/ 393 #endif /*IPSEC*/ 394 default: 395 usage(); 396 } 397 } 398 399 if (argc - optind != 1) 400 usage(); 401 target = argv[optind]; 402 403 if (source) { 404 bzero((char *)&sin, sizeof(sin)); 405 sin.sin_family = AF_INET; 406 if (inet_aton(source, &sin.sin_addr) != 0) { 407 shostname = source; 408 } else { 409 hp = gethostbyname2(source, AF_INET); 410 if (!hp) 411 errx(EX_NOHOST, "cannot resolve %s: %s", 412 source, hstrerror(h_errno)); 413 414 sin.sin_len = sizeof sin; 415 if (hp->h_length > sizeof(sin.sin_addr)) 416 errx(1,"gethostbyname2: illegal address"); 417 memcpy(&sin.sin_addr, hp->h_addr_list[0], 418 sizeof (sin.sin_addr)); 419 (void)strncpy(snamebuf, hp->h_name, 420 sizeof(snamebuf) - 1); 421 snamebuf[sizeof(snamebuf) - 1] = '\0'; 422 shostname = snamebuf; 423 } 424 if (bind(s, (struct sockaddr *)&sin, sizeof sin) == -1) 425 err(1, "bind"); 426 } 427 428 bzero((char *)&whereto, sizeof(struct sockaddr)); 429 to = (struct sockaddr_in *)&whereto; 430 to->sin_family = AF_INET; 431 if (inet_aton(target, &to->sin_addr) != 0) { 432 hostname = target; 433 } else { 434 hp = gethostbyname2(target, AF_INET); 435 if (!hp) 436 errx(EX_NOHOST, "cannot resolve %s: %s", 437 target, hstrerror(h_errno)); 438 439 to->sin_len = sizeof *to; 440 if (hp->h_length > sizeof(to->sin_addr)) 441 errx(1,"gethostbyname2 returned an illegal address"); 442 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr); 443 (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1); 444 hnamebuf[sizeof(hnamebuf) - 1] = '\0'; 445 hostname = hnamebuf; 446 } 447 448 if (options & F_FLOOD && options & F_INTERVAL) 449 errx(EX_USAGE, "-f and -i: incompatible options"); 450 451 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 452 errx(EX_USAGE, 453 "-f flag cannot be used with multicast destination"); 454 if (options & (F_MIF | F_NOLOOP | F_MTTL) 455 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 456 errx(EX_USAGE, 457 "-I, -L, -T flags cannot be used with unicast destination"); 458 459 if (datalen >= PHDR_LEN) /* can we time transfer */ 460 timing = 1; 461 packlen = datalen + MAXIPLEN + MAXICMPLEN; 462 if (!(packet = (u_char *)malloc((size_t)packlen))) 463 err(EX_UNAVAILABLE, "malloc"); 464 465 if (!(options & F_PINGFILLED)) 466 for (i = PHDR_LEN; i < datalen; ++i) 467 *datap++ = i; 468 469 ident = getpid() & 0xFFFF; 470 471 if (s < 0) { 472 errno = sockerrno; 473 err(EX_OSERR, "socket"); 474 } 475 hold = 1; 476 if (options & F_SO_DEBUG) 477 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold, 478 sizeof(hold)); 479 if (options & F_SO_DONTROUTE) 480 (void)setsockopt(s, SOL_SOCKET, SO_DONTROUTE, (char *)&hold, 481 sizeof(hold)); 482 #ifdef IPSEC 483 #ifdef IPSEC_POLICY_IPSEC 484 if (options & F_POLICY) { 485 char *buf; 486 if (policy_in != NULL) { 487 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 488 if (buf == NULL) 489 errx(EX_CONFIG, "%s", ipsec_strerror()); 490 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 491 buf, ipsec_get_policylen(buf)) < 0) 492 err(EX_CONFIG, "ipsec policy cannot be configured"); 493 free(buf); 494 } 495 496 if (policy_out != NULL) { 497 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 498 if (buf == NULL) 499 errx(EX_CONFIG, "%s", ipsec_strerror()); 500 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 501 buf, ipsec_get_policylen(buf)) < 0) 502 err(EX_CONFIG, "ipsec policy cannot be configured"); 503 free(buf); 504 } 505 } 506 #endif /*IPSEC_POLICY_IPSEC*/ 507 #endif /*IPSEC*/ 508 509 /* record route option */ 510 if (options & F_RROUTE) { 511 #ifdef IP_OPTIONS 512 bzero(rspace, sizeof(rspace)); 513 rspace[IPOPT_OPTVAL] = IPOPT_RR; 514 rspace[IPOPT_OLEN] = sizeof(rspace) - 1; 515 rspace[IPOPT_OFFSET] = IPOPT_MINOFF; 516 rspace[sizeof(rspace) - 1] = IPOPT_EOL; 517 if (setsockopt(s, IPPROTO_IP, IP_OPTIONS, rspace, 518 sizeof(rspace)) < 0) 519 err(EX_OSERR, "setsockopt IP_OPTIONS"); 520 #else 521 errx(EX_UNAVAILABLE, 522 "record route not available in this implementation"); 523 #endif /* IP_OPTIONS */ 524 } 525 526 if (options & F_TTL) { 527 if (setsockopt(s, IPPROTO_IP, IP_TTL, &ttl, 528 sizeof(ttl)) < 0) { 529 err(EX_OSERR, "setsockopt IP_TTL"); 530 } 531 } 532 if (options & F_NOLOOP) { 533 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, 534 sizeof(loop)) < 0) { 535 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP"); 536 } 537 } 538 if (options & F_MTTL) { 539 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &mttl, 540 sizeof(mttl)) < 0) { 541 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL"); 542 } 543 } 544 if (options & F_MIF) { 545 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr, 546 sizeof(ifaddr)) < 0) { 547 err(EX_OSERR, "setsockopt IP_MULTICAST_IF"); 548 } 549 } 550 #ifdef SO_TIMESTAMP 551 { int on = 1; 552 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)) < 0) 553 err(EX_OSERR, "setsockopt SO_TIMESTAMP"); 554 } 555 #endif 556 557 /* 558 * When pinging the broadcast address, you can get a lot of answers. 559 * Doing something so evil is useful if you are trying to stress the 560 * ethernet, or just want to fill the arp cache to get some stuff for 561 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast 562 * or multicast pings if they wish. 563 */ 564 hold = 48 * 1024; 565 (void)setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 566 sizeof(hold)); 567 568 if (!uid) { 569 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char *)&hold, 570 sizeof(hold)); 571 } 572 573 if (to->sin_family == AF_INET) { 574 (void)printf("PING %s (%s)", hostname, 575 inet_ntoa(to->sin_addr)); 576 if (source) 577 (void)printf(" from %s", shostname); 578 (void)printf(": %d data bytes\n", datalen); 579 } else 580 (void)printf("PING %s: %d data bytes\n", hostname, datalen); 581 582 /* 583 * Use sigaction() instead of signal() to get unambiguous semantics, 584 * in particular with SA_RESTART not set. 585 */ 586 587 sigemptyset(&si_sa.sa_mask); 588 si_sa.sa_flags = 0; 589 590 si_sa.sa_handler = stopit; 591 if (sigaction(SIGINT, &si_sa, 0) == -1) { 592 err(EX_OSERR, "sigaction SIGINT"); 593 } 594 595 si_sa.sa_handler = status; 596 if (sigaction(SIGINFO, &si_sa, 0) == -1) { 597 err(EX_OSERR, "sigaction"); 598 } 599 600 if (alarmtimeout > 0) { 601 si_sa.sa_handler = stopit; 602 if (sigaction(SIGALRM, &si_sa, 0) == -1) 603 err(EX_OSERR, "sigaction SIGALRM"); 604 } 605 606 bzero(&msg, sizeof(msg)); 607 msg.msg_name = (caddr_t)&from; 608 msg.msg_iov = &iov; 609 msg.msg_iovlen = 1; 610 #ifdef SO_TIMESTAMP 611 msg.msg_control = (caddr_t)ctrl; 612 #endif 613 iov.iov_base = packet; 614 iov.iov_len = packlen; 615 616 if (tcgetattr(STDOUT_FILENO, &ts) != -1) { 617 reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 618 ts.c_lflag |= NOKERNINFO; 619 tcsetattr(STDOUT_FILENO, TCSANOW, &ts); 620 } 621 622 while (preload--) /* fire off them quickies */ 623 pinger(); 624 625 if (options & F_FLOOD) { 626 intvl.tv_sec = 0; 627 intvl.tv_usec = 10000; 628 } else { 629 intvl.tv_sec = interval / 1000; 630 intvl.tv_usec = interval % 1000 * 1000; 631 } 632 633 pinger(); /* send the first ping */ 634 (void)gettimeofday(&last, NULL); 635 636 while (!finish_up) { 637 register int cc; 638 int n; 639 struct timeval timeout, now; 640 fd_set rfds; 641 642 check_status(); 643 FD_ZERO(&rfds); 644 FD_SET(s, &rfds); 645 (void)gettimeofday(&now, NULL); 646 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec; 647 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec; 648 while (timeout.tv_usec < 0) { 649 timeout.tv_usec += 1000000; 650 timeout.tv_sec--; 651 } 652 while (timeout.tv_usec >= 1000000) { 653 timeout.tv_usec -= 1000000; 654 timeout.tv_sec++; 655 } 656 if (timeout.tv_sec < 0) 657 timeout.tv_sec = timeout.tv_usec = 0; 658 n = select(s + 1, &rfds, NULL, NULL, &timeout); 659 if (n < 0) 660 continue; /* Must be EINTR. */ 661 if (n == 1) { 662 struct timeval *t = 0; 663 #ifdef SO_TIMESTAMP 664 struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl; 665 666 msg.msg_controllen = sizeof(ctrl); 667 #endif 668 msg.msg_namelen = sizeof(from); 669 if ((cc = recvmsg(s, &msg, 0)) < 0) { 670 if (errno == EINTR) 671 continue; 672 warn("recvmsg"); 673 continue; 674 } 675 #ifdef SO_TIMESTAMP 676 if (cmsg->cmsg_level == SOL_SOCKET && 677 cmsg->cmsg_type == SCM_TIMESTAMP && 678 cmsg->cmsg_len == CMSG_LEN(sizeof *t)) { 679 /* Copy to avoid alignment problems: */ 680 memcpy(&now,CMSG_DATA(cmsg),sizeof(now)); 681 t = &now; 682 } 683 #endif 684 if (t == 0) { 685 (void)gettimeofday(&now, NULL); 686 t = &now; 687 } 688 pr_pack((char *)packet, cc, &from, t); 689 if (npackets && nreceived >= npackets) 690 break; 691 } 692 if (n == 0 || options & F_FLOOD) { 693 if (!npackets || ntransmitted < npackets) 694 pinger(); 695 else { 696 if (almost_done) 697 break; 698 almost_done = 1; 699 intvl.tv_usec = 0; 700 if (nreceived) { 701 intvl.tv_sec = 2 * tmax / 1000; 702 if (!intvl.tv_sec) 703 intvl.tv_sec = 1; 704 } else 705 intvl.tv_sec = MAXWAIT; 706 } 707 (void)gettimeofday(&last, NULL); 708 709 if (ntransmitted != nreceived+1 && options & F_MISSED) 710 (void)write(STDOUT_FILENO, &BBELL, 1); 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(sig) 726 int sig; 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 8 bytes 736 * of the data portion are used to hold a UNIX "timeval" struct in host 737 * byte-order, to compute the round-trip time. 738 */ 739 static void 740 pinger(void) 741 { 742 register struct icmp *icp; 743 register int cc; 744 int i; 745 746 icp = (struct icmp *)outpack; 747 icp->icmp_type = ICMP_ECHO; 748 icp->icmp_code = 0; 749 icp->icmp_cksum = 0; 750 icp->icmp_seq = ntransmitted; 751 icp->icmp_id = ident; /* ID */ 752 753 CLR(icp->icmp_seq % mx_dup_ck); 754 755 if (timing) 756 (void)gettimeofday((struct timeval *)&outpack[8], 757 (struct timezone *)NULL); 758 759 cc = datalen + PHDR_LEN; /* skips ICMP portion */ 760 761 /* compute ICMP checksum here */ 762 icp->icmp_cksum = in_cksum((u_short *)icp, cc); 763 764 i = sendto(s, (char *)outpack, cc, 0, &whereto, 765 sizeof(struct sockaddr)); 766 767 if (i < 0 || i != cc) { 768 if (i < 0) { 769 if (options & F_FLOOD && errno == ENOBUFS) { 770 usleep(FLOOD_BACKOFF); 771 return; 772 } 773 warn("sendto"); 774 } else { 775 warn("%s: partial write: %d of %d bytes", 776 hostname, i, cc); 777 } 778 } 779 ntransmitted++; 780 if (!(options & F_QUIET) && options & F_FLOOD) 781 (void)write(STDOUT_FILENO, &DOT, 1); 782 } 783 784 /* 785 * pr_pack -- 786 * Print out the packet, if it came from us. This logic is necessary 787 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 788 * which arrive ('tis only fair). This permits multiple copies of this 789 * program to be run without having intermingled output (or statistics!). 790 */ 791 static void 792 pr_pack(buf, cc, from, tv) 793 char *buf; 794 int cc; 795 struct sockaddr_in *from; 796 struct timeval *tv; 797 { 798 register struct icmp *icp; 799 register u_long l; 800 register int i, j; 801 register u_char *cp,*dp; 802 static int old_rrlen; 803 static char old_rr[MAX_IPOPTLEN]; 804 struct ip *ip; 805 struct timeval *tp; 806 double triptime; 807 int hlen, dupflag; 808 809 /* Check the IP header */ 810 ip = (struct ip *)buf; 811 hlen = ip->ip_hl << 2; 812 if (cc < hlen + ICMP_MINLEN) { 813 if (options & F_VERBOSE) 814 warn("packet too short (%d bytes) from %s", cc, 815 inet_ntoa(from->sin_addr)); 816 return; 817 } 818 819 /* Now the ICMP part */ 820 cc -= hlen; 821 icp = (struct icmp *)(buf + hlen); 822 if (icp->icmp_type == ICMP_ECHOREPLY) { 823 if (icp->icmp_id != ident) 824 return; /* 'Twas not our ECHO */ 825 ++nreceived; 826 triptime = 0.0; 827 if (timing) { 828 struct timeval tv1; 829 #ifndef icmp_data 830 tp = (struct timeval *)&icp->icmp_ip; 831 #else 832 tp = (struct timeval *)icp->icmp_data; 833 #endif 834 /* Avoid unaligned data: */ 835 memcpy(&tv1,tp,sizeof(tv1)); 836 tvsub(tv, &tv1); 837 triptime = ((double)tv->tv_sec) * 1000.0 + 838 ((double)tv->tv_usec) / 1000.0; 839 tsum += triptime; 840 tsumsq += triptime * triptime; 841 if (triptime < tmin) 842 tmin = triptime; 843 if (triptime > tmax) 844 tmax = triptime; 845 } 846 847 if (TST(icp->icmp_seq % mx_dup_ck)) { 848 ++nrepeats; 849 --nreceived; 850 dupflag = 1; 851 } else { 852 SET(icp->icmp_seq % mx_dup_ck); 853 dupflag = 0; 854 } 855 856 if (options & F_QUIET) 857 return; 858 859 if (options & F_FLOOD) 860 (void)write(STDOUT_FILENO, &BSPACE, 1); 861 else { 862 (void)printf("%d bytes from %s: icmp_seq=%u", cc, 863 inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr), 864 icp->icmp_seq); 865 (void)printf(" ttl=%d", ip->ip_ttl); 866 if (timing) 867 (void)printf(" time=%.3f ms", triptime); 868 if (dupflag) 869 (void)printf(" (DUP!)"); 870 if (options & F_AUDIBLE) 871 (void)write(STDOUT_FILENO, &BBELL, 1); 872 /* check the data */ 873 cp = (u_char*)&icp->icmp_data[PHDR_LEN]; 874 dp = &outpack[8 + PHDR_LEN]; 875 for (i = PHDR_LEN; i < datalen; ++i, ++cp, ++dp) { 876 if (*cp != *dp) { 877 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", 878 i, *dp, *cp); 879 printf("\ncp:"); 880 cp = (u_char*)&icp->icmp_data[0]; 881 for (i = 0; i < datalen; ++i, ++cp) { 882 if ((i % 32) == 8) 883 (void)printf("\n\t"); 884 (void)printf("%x ", *cp); 885 } 886 printf("\ndp:"); 887 cp = &outpack[8]; 888 for (i = 0; i < datalen; ++i, ++cp) { 889 if ((i % 32) == 8) 890 (void)printf("\n\t"); 891 (void)printf("%x ", *cp); 892 } 893 break; 894 } 895 } 896 } 897 } else { 898 /* 899 * We've got something other than an ECHOREPLY. 900 * See if it's a reply to something that we sent. 901 * We can compare IP destination, protocol, 902 * and ICMP type and ID. 903 * 904 * Only print all the error messages if we are running 905 * as root to avoid leaking information not normally 906 * available to those not running as root. 907 */ 908 #ifndef icmp_data 909 struct ip *oip = &icp->icmp_ip; 910 #else 911 struct ip *oip = (struct ip *)icp->icmp_data; 912 #endif 913 struct icmp *oicmp = (struct icmp *)(oip + 1); 914 915 if (((options & F_VERBOSE) && uid == 0) || 916 (!(options & F_QUIET2) && 917 (oip->ip_dst.s_addr == 918 ((struct sockaddr_in *)&whereto)->sin_addr.s_addr) && 919 (oip->ip_p == IPPROTO_ICMP) && 920 (oicmp->icmp_type == ICMP_ECHO) && 921 (oicmp->icmp_id == ident))) { 922 (void)printf("%d bytes from %s: ", cc, 923 pr_addr(from->sin_addr)); 924 pr_icmph(icp); 925 } else 926 return; 927 } 928 929 /* Display any IP options */ 930 cp = (u_char *)buf + sizeof(struct ip); 931 932 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp) 933 switch (*cp) { 934 case IPOPT_EOL: 935 hlen = 0; 936 break; 937 case IPOPT_LSRR: 938 (void)printf("\nLSRR: "); 939 hlen -= 2; 940 j = *++cp; 941 ++cp; 942 if (j > IPOPT_MINOFF) 943 for (;;) { 944 l = *++cp; 945 l = (l<<8) + *++cp; 946 l = (l<<8) + *++cp; 947 l = (l<<8) + *++cp; 948 if (l == 0) { 949 printf("\t0.0.0.0"); 950 } else { 951 struct in_addr ina; 952 ina.s_addr = ntohl(l); 953 printf("\t%s", pr_addr(ina)); 954 } 955 hlen -= 4; 956 j -= 4; 957 if (j <= IPOPT_MINOFF) 958 break; 959 (void)putchar('\n'); 960 } 961 break; 962 case IPOPT_RR: 963 j = *++cp; /* get length */ 964 i = *++cp; /* and pointer */ 965 hlen -= 2; 966 if (i > j) 967 i = j; 968 i -= IPOPT_MINOFF; 969 if (i <= 0) 970 continue; 971 if (i == old_rrlen 972 && cp == (u_char *)buf + sizeof(struct ip) + 2 973 && !bcmp((char *)cp, old_rr, i) 974 && !(options & F_FLOOD)) { 975 (void)printf("\t(same route)"); 976 i = ((i + 3) / 4) * 4; 977 hlen -= i; 978 cp += i; 979 break; 980 } 981 if (i < MAX_IPOPTLEN) { 982 old_rrlen = i; 983 bcopy((char *)cp, old_rr, i); 984 } else 985 old_rrlen = 0; 986 987 (void)printf("\nRR: "); 988 j = 0; 989 for (;;) { 990 l = *++cp; 991 l = (l<<8) + *++cp; 992 l = (l<<8) + *++cp; 993 l = (l<<8) + *++cp; 994 if (l == 0) { 995 printf("\t0.0.0.0"); 996 } else { 997 struct in_addr ina; 998 ina.s_addr = ntohl(l); 999 printf("\t%s", pr_addr(ina)); 1000 } 1001 hlen -= 4; 1002 i -= 4; 1003 j += 4; 1004 if (i <= 0) 1005 break; 1006 if (j >= MAX_IPOPTLEN) { 1007 (void) printf("\t(truncated route)"); 1008 break; 1009 } 1010 (void)putchar('\n'); 1011 } 1012 break; 1013 case IPOPT_NOP: 1014 (void)printf("\nNOP"); 1015 break; 1016 default: 1017 (void)printf("\nunknown option %x", *cp); 1018 break; 1019 } 1020 if (!(options & F_FLOOD)) { 1021 (void)putchar('\n'); 1022 (void)fflush(stdout); 1023 } 1024 } 1025 1026 /* 1027 * in_cksum -- 1028 * Checksum routine for Internet Protocol family headers (C Version) 1029 */ 1030 u_short 1031 in_cksum(addr, len) 1032 u_short *addr; 1033 int len; 1034 { 1035 register int nleft = len; 1036 register u_short *w = addr; 1037 register int sum = 0; 1038 union { 1039 u_short us; 1040 u_char uc[2]; 1041 } last; 1042 u_short answer; 1043 1044 /* 1045 * Our algorithm is simple, using a 32 bit accumulator (sum), we add 1046 * sequential 16 bit words to it, and at the end, fold back all the 1047 * carry bits from the top 16 bits into the lower 16 bits. 1048 */ 1049 while (nleft > 1) { 1050 sum += *w++; 1051 nleft -= 2; 1052 } 1053 1054 /* mop up an odd byte, if necessary */ 1055 if (nleft == 1) { 1056 last.uc[0] = *(u_char *)w; 1057 last.uc[1] = 0; 1058 sum += last.us; 1059 } 1060 1061 /* add back carry outs from top 16 bits to low 16 bits */ 1062 sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */ 1063 sum += (sum >> 16); /* add carry */ 1064 answer = ~sum; /* truncate to 16 bits */ 1065 return(answer); 1066 } 1067 1068 /* 1069 * tvsub -- 1070 * Subtract 2 timeval structs: out = out - in. Out is assumed to 1071 * be >= in. 1072 */ 1073 static void 1074 tvsub(out, in) 1075 register struct timeval *out, *in; 1076 { 1077 if ((out->tv_usec -= in->tv_usec) < 0) { 1078 --out->tv_sec; 1079 out->tv_usec += 1000000; 1080 } 1081 out->tv_sec -= in->tv_sec; 1082 } 1083 1084 /* 1085 * status -- 1086 * Print out statistics when SIGINFO is received. 1087 */ 1088 1089 static void 1090 status(sig) 1091 int sig; 1092 { 1093 siginfo_p = 1; 1094 } 1095 1096 static void 1097 check_status() 1098 { 1099 if (siginfo_p) { 1100 siginfo_p = 0; 1101 (void)fprintf(stderr, 1102 "\r%ld/%ld packets received (%.0f%%) %.3f min / %.3f avg / %.3f max\n", 1103 nreceived, ntransmitted, 1104 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0, 1105 nreceived ? tmin : 0.0, 1106 nreceived + nrepeats ? tsum / (nreceived + nrepeats) : tsum, 1107 tmax); 1108 } 1109 } 1110 1111 /* 1112 * finish -- 1113 * Print out statistics, and give up. 1114 */ 1115 static void 1116 finish() 1117 { 1118 struct termios ts; 1119 1120 (void)signal(SIGINT, SIG_IGN); 1121 (void)signal(SIGALRM, SIG_IGN); 1122 (void)putchar('\n'); 1123 (void)fflush(stdout); 1124 (void)printf("--- %s ping statistics ---\n", hostname); 1125 (void)printf("%ld packets transmitted, ", ntransmitted); 1126 (void)printf("%ld packets received, ", nreceived); 1127 if (nrepeats) 1128 (void)printf("+%ld duplicates, ", nrepeats); 1129 if (ntransmitted) { 1130 if (nreceived > ntransmitted) 1131 (void)printf("-- somebody's printing up packets!"); 1132 else 1133 (void)printf("%d%% packet loss", 1134 (int) (((ntransmitted - nreceived) * 100) / 1135 ntransmitted)); 1136 } 1137 (void)putchar('\n'); 1138 if (nreceived && timing) { 1139 double n = nreceived + nrepeats; 1140 double avg = tsum / n; 1141 double vari = tsumsq / n - avg * avg; 1142 printf("round-trip min/avg/max/stddev = " 1143 "%.3f/%.3f/%.3f/%.3f ms\n", 1144 tmin, avg, tmax, sqrt(vari)); 1145 } 1146 if (reset_kerninfo && tcgetattr(STDOUT_FILENO, &ts) != -1) { 1147 ts.c_lflag &= ~NOKERNINFO; 1148 tcsetattr(STDOUT_FILENO, TCSANOW, &ts); 1149 } 1150 1151 if (nreceived) 1152 exit(0); 1153 else 1154 exit(2); 1155 } 1156 1157 #ifdef notdef 1158 static char *ttab[] = { 1159 "Echo Reply", /* ip + seq + udata */ 1160 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */ 1161 "Source Quench", /* IP */ 1162 "Redirect", /* redirect type, gateway, + IP */ 1163 "Echo", 1164 "Time Exceeded", /* transit, frag reassem + IP */ 1165 "Parameter Problem", /* pointer + IP */ 1166 "Timestamp", /* id + seq + three timestamps */ 1167 "Timestamp Reply", /* " */ 1168 "Info Request", /* id + sq */ 1169 "Info Reply" /* " */ 1170 }; 1171 #endif 1172 1173 /* 1174 * pr_icmph -- 1175 * Print a descriptive string about an ICMP header. 1176 */ 1177 static void 1178 pr_icmph(icp) 1179 struct icmp *icp; 1180 { 1181 switch(icp->icmp_type) { 1182 case ICMP_ECHOREPLY: 1183 (void)printf("Echo Reply\n"); 1184 /* XXX ID + Seq + Data */ 1185 break; 1186 case ICMP_UNREACH: 1187 switch(icp->icmp_code) { 1188 case ICMP_UNREACH_NET: 1189 (void)printf("Destination Net Unreachable\n"); 1190 break; 1191 case ICMP_UNREACH_HOST: 1192 (void)printf("Destination Host Unreachable\n"); 1193 break; 1194 case ICMP_UNREACH_PROTOCOL: 1195 (void)printf("Destination Protocol Unreachable\n"); 1196 break; 1197 case ICMP_UNREACH_PORT: 1198 (void)printf("Destination Port Unreachable\n"); 1199 break; 1200 case ICMP_UNREACH_NEEDFRAG: 1201 (void)printf("frag needed and DF set (MTU %d)\n", 1202 ntohs(icp->icmp_nextmtu)); 1203 break; 1204 case ICMP_UNREACH_SRCFAIL: 1205 (void)printf("Source Route Failed\n"); 1206 break; 1207 case ICMP_UNREACH_FILTER_PROHIB: 1208 (void)printf("Communication prohibited by filter\n"); 1209 break; 1210 default: 1211 (void)printf("Dest Unreachable, Bad Code: %d\n", 1212 icp->icmp_code); 1213 break; 1214 } 1215 /* Print returned IP header information */ 1216 #ifndef icmp_data 1217 pr_retip(&icp->icmp_ip); 1218 #else 1219 pr_retip((struct ip *)icp->icmp_data); 1220 #endif 1221 break; 1222 case ICMP_SOURCEQUENCH: 1223 (void)printf("Source Quench\n"); 1224 #ifndef icmp_data 1225 pr_retip(&icp->icmp_ip); 1226 #else 1227 pr_retip((struct ip *)icp->icmp_data); 1228 #endif 1229 break; 1230 case ICMP_REDIRECT: 1231 switch(icp->icmp_code) { 1232 case ICMP_REDIRECT_NET: 1233 (void)printf("Redirect Network"); 1234 break; 1235 case ICMP_REDIRECT_HOST: 1236 (void)printf("Redirect Host"); 1237 break; 1238 case ICMP_REDIRECT_TOSNET: 1239 (void)printf("Redirect Type of Service and Network"); 1240 break; 1241 case ICMP_REDIRECT_TOSHOST: 1242 (void)printf("Redirect Type of Service and Host"); 1243 break; 1244 default: 1245 (void)printf("Redirect, Bad Code: %d", icp->icmp_code); 1246 break; 1247 } 1248 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr)); 1249 #ifndef icmp_data 1250 pr_retip(&icp->icmp_ip); 1251 #else 1252 pr_retip((struct ip *)icp->icmp_data); 1253 #endif 1254 break; 1255 case ICMP_ECHO: 1256 (void)printf("Echo Request\n"); 1257 /* XXX ID + Seq + Data */ 1258 break; 1259 case ICMP_TIMXCEED: 1260 switch(icp->icmp_code) { 1261 case ICMP_TIMXCEED_INTRANS: 1262 (void)printf("Time to live exceeded\n"); 1263 break; 1264 case ICMP_TIMXCEED_REASS: 1265 (void)printf("Frag reassembly time exceeded\n"); 1266 break; 1267 default: 1268 (void)printf("Time exceeded, Bad Code: %d\n", 1269 icp->icmp_code); 1270 break; 1271 } 1272 #ifndef icmp_data 1273 pr_retip(&icp->icmp_ip); 1274 #else 1275 pr_retip((struct ip *)icp->icmp_data); 1276 #endif 1277 break; 1278 case ICMP_PARAMPROB: 1279 (void)printf("Parameter problem: pointer = 0x%02x\n", 1280 icp->icmp_hun.ih_pptr); 1281 #ifndef icmp_data 1282 pr_retip(&icp->icmp_ip); 1283 #else 1284 pr_retip((struct ip *)icp->icmp_data); 1285 #endif 1286 break; 1287 case ICMP_TSTAMP: 1288 (void)printf("Timestamp\n"); 1289 /* XXX ID + Seq + 3 timestamps */ 1290 break; 1291 case ICMP_TSTAMPREPLY: 1292 (void)printf("Timestamp Reply\n"); 1293 /* XXX ID + Seq + 3 timestamps */ 1294 break; 1295 case ICMP_IREQ: 1296 (void)printf("Information Request\n"); 1297 /* XXX ID + Seq */ 1298 break; 1299 case ICMP_IREQREPLY: 1300 (void)printf("Information Reply\n"); 1301 /* XXX ID + Seq */ 1302 break; 1303 case ICMP_MASKREQ: 1304 (void)printf("Address Mask Request\n"); 1305 break; 1306 case ICMP_MASKREPLY: 1307 (void)printf("Address Mask Reply\n"); 1308 break; 1309 case ICMP_ROUTERADVERT: 1310 (void)printf("Router Advertisement\n"); 1311 break; 1312 case ICMP_ROUTERSOLICIT: 1313 (void)printf("Router Solicitation\n"); 1314 break; 1315 default: 1316 (void)printf("Bad ICMP type: %d\n", icp->icmp_type); 1317 } 1318 } 1319 1320 /* 1321 * pr_iph -- 1322 * Print an IP header with options. 1323 */ 1324 static void 1325 pr_iph(ip) 1326 struct ip *ip; 1327 { 1328 int hlen; 1329 u_char *cp; 1330 1331 hlen = ip->ip_hl << 2; 1332 cp = (u_char *)ip + 20; /* point to options */ 1333 1334 (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1335 (void)printf(" %1x %1x %02x %04x %04x", 1336 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len), 1337 ntohs(ip->ip_id)); 1338 (void)printf(" %1lx %04lx", 1339 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13, 1340 (u_long) ntohl(ip->ip_off) & 0x1fff); 1341 (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, 1342 ntohs(ip->ip_sum)); 1343 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1344 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1345 /* dump any option bytes */ 1346 while (hlen-- > 20) { 1347 (void)printf("%02x", *cp++); 1348 } 1349 (void)putchar('\n'); 1350 } 1351 1352 /* 1353 * pr_addr -- 1354 * Return an ascii host address as a dotted quad and optionally with 1355 * a hostname. 1356 */ 1357 static char * 1358 pr_addr(ina) 1359 struct in_addr ina; 1360 { 1361 struct hostent *hp; 1362 static char buf[16 + 3 + MAXHOSTNAMELEN]; 1363 1364 if ((options & F_NUMERIC) || 1365 !(hp = gethostbyaddr((char *)&ina, 4, AF_INET))) 1366 return inet_ntoa(ina); 1367 else 1368 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1369 inet_ntoa(ina)); 1370 return(buf); 1371 } 1372 1373 /* 1374 * pr_retip -- 1375 * Dump some info on a returned (via ICMP) IP packet. 1376 */ 1377 static void 1378 pr_retip(ip) 1379 struct ip *ip; 1380 { 1381 int hlen; 1382 u_char *cp; 1383 1384 pr_iph(ip); 1385 hlen = ip->ip_hl << 2; 1386 cp = (u_char *)ip + hlen; 1387 1388 if (ip->ip_p == 6) 1389 (void)printf("TCP: from port %u, to port %u (decimal)\n", 1390 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1391 else if (ip->ip_p == 17) 1392 (void)printf("UDP: from port %u, to port %u (decimal)\n", 1393 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1394 } 1395 1396 static void 1397 fill(bp, patp) 1398 char *bp, *patp; 1399 { 1400 register int ii, jj, kk; 1401 int pat[16]; 1402 char *cp; 1403 1404 for (cp = patp; *cp; cp++) { 1405 if (!isxdigit(*cp)) 1406 errx(EX_USAGE, 1407 "patterns must be specified as hex digits"); 1408 1409 } 1410 ii = sscanf(patp, 1411 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1412 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 1413 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 1414 &pat[13], &pat[14], &pat[15]); 1415 1416 if (ii > 0) 1417 for (kk = 0; 1418 kk <= MAXPACKET - (8 + PHDR_LEN + ii); 1419 kk += ii) 1420 for (jj = 0; jj < ii; ++jj) 1421 bp[jj + kk] = pat[jj]; 1422 if (!(options & F_QUIET)) { 1423 (void)printf("PATTERN: 0x"); 1424 for (jj = 0; jj < ii; ++jj) 1425 (void)printf("%02x", bp[jj] & 0xFF); 1426 (void)printf("\n"); 1427 } 1428 } 1429 1430 static void 1431 usage() 1432 { 1433 fprintf(stderr, "%s\n%s\n%s\n", 1434 "usage: ping [-QRadfnqrv] [-c count] [-i wait] [-l preload] [-m ttl]", 1435 " [-p pattern] " 1436 #ifdef IPSEC 1437 #ifdef IPSEC_POLICY_IPSEC 1438 "[-P policy] " 1439 #endif 1440 #endif 1441 "[-s packetsize] [-S src_addr] [-t timeout]", 1442 " [host | [-L] [-I iface] [-T ttl] mcast-group]"); 1443 exit(EX_USAGE); 1444 } 1445