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 #include <sys/socket.h> 71 #include <sys/sysctl.h> 72 #include <sys/time.h> 73 #include <sys/uio.h> 74 75 #include <netinet/in.h> 76 #include <netinet/in_systm.h> 77 #include <netinet/ip.h> 78 #include <netinet/ip_icmp.h> 79 #include <netinet/ip_var.h> 80 #include <arpa/inet.h> 81 82 #ifdef IPSEC 83 #include <netinet6/ipsec.h> 84 #endif /*IPSEC*/ 85 86 #include <ctype.h> 87 #include <err.h> 88 #include <errno.h> 89 #include <math.h> 90 #include <netdb.h> 91 #include <signal.h> 92 #include <stdio.h> 93 #include <stdlib.h> 94 #include <string.h> 95 #include <sysexits.h> 96 #include <termios.h> 97 #include <unistd.h> 98 99 #define INADDR_LEN ((int)sizeof(in_addr_t)) 100 #define TIMEVAL_LEN ((int)sizeof(struct timeval)) 101 #define MASK_LEN (ICMP_MASKLEN - ICMP_MINLEN) 102 #define TS_LEN (ICMP_TSLEN - ICMP_MINLEN) 103 #define DEFDATALEN 64 /* default data length */ 104 #define FLOOD_BACKOFF 20000 /* usecs to back off if F_FLOOD mode */ 105 /* runs out of buffer space */ 106 #define MAXIPLEN (sizeof(struct ip) + MAX_IPOPTLEN) 107 #define MAXICMPLEN (ICMP_ADVLENMIN + MAX_IPOPTLEN) 108 #define MINICMPLEN ICMP_MINLEN 109 #define MAXWAIT 10 /* max seconds to wait for response */ 110 #define MAXALARM (60 * 60) /* max seconds for alarm timeout */ 111 #define MAXTOS 255 112 113 #define A(bit) rcvd_tbl[(bit)>>3] /* identify byte in array */ 114 #define B(bit) (1 << ((bit) & 0x07)) /* identify bit in byte */ 115 #define SET(bit) (A(bit) |= B(bit)) 116 #define CLR(bit) (A(bit) &= (~B(bit))) 117 #define TST(bit) (A(bit) & B(bit)) 118 119 /* various options */ 120 int options; 121 #define F_FLOOD 0x0001 122 #define F_INTERVAL 0x0002 123 #define F_NUMERIC 0x0004 124 #define F_PINGFILLED 0x0008 125 #define F_QUIET 0x0010 126 #define F_RROUTE 0x0020 127 #define F_SO_DEBUG 0x0040 128 #define F_SO_DONTROUTE 0x0080 129 #define F_VERBOSE 0x0100 130 #define F_QUIET2 0x0200 131 #define F_NOLOOP 0x0400 132 #define F_MTTL 0x0800 133 #define F_MIF 0x1000 134 #define F_AUDIBLE 0x2000 135 #ifdef IPSEC 136 #ifdef IPSEC_POLICY_IPSEC 137 #define F_POLICY 0x4000 138 #endif /*IPSEC_POLICY_IPSEC*/ 139 #endif /*IPSEC*/ 140 #define F_TTL 0x8000 141 #define F_MISSED 0x10000 142 #define F_ONCE 0x20000 143 #define F_HDRINCL 0x40000 144 #define F_MASK 0x80000 145 #define F_TIME 0x100000 146 147 /* 148 * MAX_DUP_CHK is the number of bits in received table, i.e. the maximum 149 * number of received sequence numbers we can keep track of. Change 128 150 * to 8192 for complete accuracy... 151 */ 152 #define MAX_DUP_CHK (8 * 128) 153 int mx_dup_ck = MAX_DUP_CHK; 154 char rcvd_tbl[MAX_DUP_CHK / 8]; 155 156 struct sockaddr_in whereto; /* who to ping */ 157 long maxpayload; 158 int datalen = DEFDATALEN; 159 int s; /* socket file descriptor */ 160 u_char outpackhdr[IP_MAXPACKET], *outpack; 161 char BBELL = '\a'; /* characters written for MISSED and AUDIBLE */ 162 char BSPACE = '\b'; /* characters written for flood */ 163 char DOT = '.'; 164 char *hostname; 165 char *shostname; 166 int ident; /* process id to identify our packets */ 167 int uid; /* cached uid for micro-optimization */ 168 u_char icmp_type = ICMP_ECHO; 169 u_char icmp_type_rsp = ICMP_ECHOREPLY; 170 int timeoffset = 0; 171 int phdr_len = 0; 172 173 /* counters */ 174 long nmissedmax; /* max value of ntransmitted - nreceived - 1 */ 175 long npackets; /* max packets to transmit */ 176 long nreceived; /* # of packets we got back */ 177 long nrepeats; /* number of duplicates */ 178 long ntransmitted; /* sequence # for outbound packets = #sent */ 179 int interval = 1000; /* interval between packets, ms */ 180 181 /* timing */ 182 int timing; /* flag to do timing */ 183 double tmin = 999999999.0; /* minimum round trip time */ 184 double tmax = 0.0; /* maximum round trip time */ 185 double tsum = 0.0; /* sum of all times, for doing average */ 186 double tsumsq = 0.0; /* sum of all times squared, for std. dev. */ 187 188 volatile sig_atomic_t finish_up; /* nonzero if we've been told to finish up */ 189 int reset_kerninfo; 190 volatile sig_atomic_t siginfo_p; 191 192 static void fill(char *, char *); 193 static u_short in_cksum(u_short *, int); 194 static void check_status(void); 195 static void finish(void) __dead2; 196 static void pinger(void); 197 static char *pr_addr(struct in_addr); 198 static char *pr_ntime(n_time); 199 static void pr_icmph(struct icmp *); 200 static void pr_iph(struct ip *); 201 static void pr_pack(char *, int, struct sockaddr_in *, struct timeval *); 202 static void pr_retip(struct ip *); 203 static void status(int); 204 static void stopit(int); 205 static void tvsub(struct timeval *, struct timeval *); 206 static void usage(void) __dead2; 207 208 int 209 main(argc, argv) 210 int argc; 211 char *const *argv; 212 { 213 struct sockaddr_in from, sin; 214 struct in_addr ifaddr; 215 struct timeval last, intvl; 216 struct iovec iov; 217 struct ip *ip; 218 struct msghdr msg; 219 struct sigaction si_sa; 220 struct termios ts; 221 size_t sz; 222 u_char *datap, packet[IP_MAXPACKET]; 223 char *ep, *source, *target, *payload; 224 struct hostent *hp; 225 #ifdef IPSEC_POLICY_IPSEC 226 char *policy_in, *policy_out; 227 #endif 228 struct sockaddr_in *to; 229 double t; 230 u_long alarmtimeout, ultmp; 231 int almost_done, ch, df, hold, i, mib[4], packlen, preload, sockerrno, 232 tos, ttl; 233 char ctrl[CMSG_SPACE(sizeof(struct timeval))]; 234 char hnamebuf[MAXHOSTNAMELEN], snamebuf[MAXHOSTNAMELEN]; 235 #ifdef IP_OPTIONS 236 char rspace[MAX_IPOPTLEN]; /* record route space */ 237 #endif 238 unsigned char loop, mttl; 239 240 source = NULL; 241 #ifdef IPSEC_POLICY_IPSEC 242 policy_in = policy_out = NULL; 243 #endif 244 245 /* 246 * Do the stuff that we need root priv's for *first*, and 247 * then drop our setuid bit. Save error reporting for 248 * after arg parsing. 249 */ 250 s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); 251 sockerrno = errno; 252 253 setuid(getuid()); 254 uid = getuid(); 255 256 alarmtimeout = df = preload = tos = 0; 257 258 outpack = outpackhdr + sizeof(struct ip); 259 while ((ch = getopt(argc, argv, 260 "Aac:DdfI:i:Ll:M:m:nop:QqRrS:s:T:t:vz:" 261 #ifdef IPSEC 262 #ifdef IPSEC_POLICY_IPSEC 263 "P:" 264 #endif /*IPSEC_POLICY_IPSEC*/ 265 #endif /*IPSEC*/ 266 )) != -1) 267 { 268 switch(ch) { 269 case 'A': 270 options |= F_MISSED; 271 break; 272 case 'a': 273 options |= F_AUDIBLE; 274 break; 275 case 'c': 276 ultmp = strtoul(optarg, &ep, 0); 277 if (*ep || ep == optarg || ultmp > LONG_MAX || !ultmp) 278 errx(EX_USAGE, 279 "invalid count of packets to transmit: `%s'", 280 optarg); 281 npackets = ultmp; 282 break; 283 case 'D': 284 options |= F_HDRINCL; 285 df = 1; 286 break; 287 case 'd': 288 options |= F_SO_DEBUG; 289 break; 290 case 'f': 291 if (uid) { 292 errno = EPERM; 293 err(EX_NOPERM, "-f flag"); 294 } 295 options |= F_FLOOD; 296 setbuf(stdout, (char *)NULL); 297 break; 298 case 'I': /* multicast interface */ 299 if (inet_aton(optarg, &ifaddr) == 0) 300 errx(EX_USAGE, 301 "invalid multicast interface: `%s'", 302 optarg); 303 options |= F_MIF; 304 break; 305 case 'i': /* wait between sending packets */ 306 t = strtod(optarg, &ep) * 1000.0; 307 if (*ep || ep == optarg || t > (double)INT_MAX) 308 errx(EX_USAGE, "invalid timing interval: `%s'", 309 optarg); 310 options |= F_INTERVAL; 311 interval = (int)t; 312 if (uid && interval < 1000) { 313 errno = EPERM; 314 err(EX_NOPERM, "-i interval too short"); 315 } 316 break; 317 case 'L': 318 options |= F_NOLOOP; 319 loop = 0; 320 break; 321 case 'l': 322 ultmp = strtoul(optarg, &ep, 0); 323 if (*ep || ep == optarg || ultmp > INT_MAX) 324 errx(EX_USAGE, 325 "invalid preload value: `%s'", optarg); 326 if (uid) { 327 errno = EPERM; 328 err(EX_NOPERM, "-l flag"); 329 } 330 preload = ultmp; 331 break; 332 case 'M': 333 switch(optarg[0]) { 334 case 'M': 335 case 'm': 336 options |= F_MASK; 337 break; 338 case 'T': 339 case 't': 340 options |= F_TIME; 341 break; 342 default: 343 errx(EX_USAGE, "invalid message: `%c'", optarg[0]); 344 break; 345 } 346 break; 347 case 'm': /* TTL */ 348 ultmp = strtoul(optarg, &ep, 0); 349 if (*ep || ep == optarg || ultmp > MAXTTL) 350 errx(EX_USAGE, "invalid TTL: `%s'", optarg); 351 ttl = ultmp; 352 options |= F_TTL; 353 break; 354 case 'n': 355 options |= F_NUMERIC; 356 break; 357 case 'o': 358 options |= F_ONCE; 359 break; 360 #ifdef IPSEC 361 #ifdef IPSEC_POLICY_IPSEC 362 case 'P': 363 options |= F_POLICY; 364 if (!strncmp("in", optarg, 2)) 365 policy_in = strdup(optarg); 366 else if (!strncmp("out", optarg, 3)) 367 policy_out = strdup(optarg); 368 else 369 errx(1, "invalid security policy"); 370 break; 371 #endif /*IPSEC_POLICY_IPSEC*/ 372 #endif /*IPSEC*/ 373 case 'p': /* fill buffer with user pattern */ 374 options |= F_PINGFILLED; 375 payload = optarg; 376 break; 377 case 'Q': 378 options |= F_QUIET2; 379 break; 380 case 'q': 381 options |= F_QUIET; 382 break; 383 case 'R': 384 options |= F_RROUTE; 385 break; 386 case 'r': 387 options |= F_SO_DONTROUTE; 388 break; 389 case 'S': 390 source = optarg; 391 break; 392 case 's': /* size of packet to send */ 393 ultmp = strtoul(optarg, &ep, 0); 394 if (*ep || ep == optarg) 395 errx(EX_USAGE, "invalid packet size: `%s'", 396 optarg); 397 if (uid != 0 && ultmp > DEFDATALEN) { 398 errno = EPERM; 399 err(EX_NOPERM, 400 "packet size too large: %lu > %u", 401 ultmp, DEFDATALEN); 402 } 403 datalen = ultmp; 404 break; 405 case 'T': /* multicast TTL */ 406 ultmp = strtoul(optarg, &ep, 0); 407 if (*ep || ep == optarg || ultmp > MAXTTL) 408 errx(EX_USAGE, "invalid multicast TTL: `%s'", 409 optarg); 410 mttl = ultmp; 411 options |= F_MTTL; 412 break; 413 case 't': 414 alarmtimeout = strtoul(optarg, &ep, 0); 415 if ((alarmtimeout < 1) || (alarmtimeout == ULONG_MAX)) 416 errx(EX_USAGE, "invalid timeout: `%s'", 417 optarg); 418 if (alarmtimeout > MAXALARM) 419 errx(EX_USAGE, "invalid timeout: `%s' > %d", 420 optarg, MAXALARM); 421 alarm((int)alarmtimeout); 422 break; 423 case 'v': 424 options |= F_VERBOSE; 425 break; 426 case 'z': 427 options |= F_HDRINCL; 428 ultmp = strtoul(optarg, &ep, 0); 429 if (*ep || ep == optarg || ultmp > MAXTOS) 430 errx(EX_USAGE, "invalid TOS: `%s'", optarg); 431 tos = ultmp; 432 break; 433 default: 434 usage(); 435 } 436 } 437 438 if (argc - optind != 1) 439 usage(); 440 target = argv[optind]; 441 442 maxpayload = IP_MAXPACKET - sizeof(struct ip) - MINICMPLEN; 443 if (options & F_MASK) { 444 icmp_type = ICMP_MASKREQ; 445 icmp_type_rsp = ICMP_MASKREPLY; 446 timeoffset = MASK_LEN; 447 datalen -= MASK_LEN; 448 phdr_len += MASK_LEN; 449 if (!(options & F_QUIET)) 450 (void)printf("ICMP_MASKREQ\n"); 451 } 452 if (options & F_TIME) { 453 icmp_type = ICMP_TSTAMP; 454 icmp_type_rsp = ICMP_TSTAMPREPLY; 455 timeoffset = TS_LEN; 456 datalen -= TS_LEN; 457 phdr_len += TS_LEN; 458 if (!(options & F_QUIET)) 459 (void)printf("ICMP_TSTAMP\n"); 460 } 461 if (options & F_RROUTE) 462 maxpayload -= MAX_IPOPTLEN; 463 if (datalen > maxpayload) 464 errx(EX_USAGE, "packet size too large: %lu > %u", datalen, 465 maxpayload); 466 datap = &outpack[MINICMPLEN + phdr_len]; 467 if (options & F_PINGFILLED) { 468 fill((char *)datap, payload); 469 } 470 if (source) { 471 bzero((char *)&sin, sizeof(sin)); 472 sin.sin_family = AF_INET; 473 if (inet_aton(source, &sin.sin_addr) != 0) { 474 shostname = source; 475 } else { 476 hp = gethostbyname2(source, AF_INET); 477 if (!hp) 478 errx(EX_NOHOST, "cannot resolve %s: %s", 479 source, hstrerror(h_errno)); 480 481 sin.sin_len = sizeof sin; 482 if (hp->h_length > sizeof(sin.sin_addr) || 483 hp->h_length < 0) 484 errx(1, "gethostbyname2: illegal address"); 485 memcpy(&sin.sin_addr, hp->h_addr_list[0], 486 sizeof(sin.sin_addr)); 487 (void)strncpy(snamebuf, hp->h_name, 488 sizeof(snamebuf) - 1); 489 snamebuf[sizeof(snamebuf) - 1] = '\0'; 490 shostname = snamebuf; 491 } 492 if (bind(s, (struct sockaddr *)&sin, sizeof sin) == -1) 493 err(1, "bind"); 494 } 495 496 bzero(&whereto, sizeof(whereto)); 497 to = &whereto; 498 to->sin_family = AF_INET; 499 to->sin_len = sizeof *to; 500 if (inet_aton(target, &to->sin_addr) != 0) { 501 hostname = target; 502 } else { 503 hp = gethostbyname2(target, AF_INET); 504 if (!hp) 505 errx(EX_NOHOST, "cannot resolve %s: %s", 506 target, hstrerror(h_errno)); 507 508 if (hp->h_length > sizeof(to->sin_addr)) 509 errx(1, "gethostbyname2 returned an illegal address"); 510 memcpy(&to->sin_addr, hp->h_addr_list[0], sizeof to->sin_addr); 511 (void)strncpy(hnamebuf, hp->h_name, sizeof(hnamebuf) - 1); 512 hnamebuf[sizeof(hnamebuf) - 1] = '\0'; 513 hostname = hnamebuf; 514 } 515 516 if (options & F_FLOOD && options & F_INTERVAL) 517 errx(EX_USAGE, "-f and -i: incompatible options"); 518 519 if (options & F_FLOOD && IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 520 errx(EX_USAGE, 521 "-f flag cannot be used with multicast destination"); 522 if (options & (F_MIF | F_NOLOOP | F_MTTL) 523 && !IN_MULTICAST(ntohl(to->sin_addr.s_addr))) 524 errx(EX_USAGE, 525 "-I, -L, -T flags cannot be used with unicast destination"); 526 527 if (datalen - TIMEVAL_LEN >= TIMEVAL_LEN) { /* can we time transfer */ 528 datalen -= TIMEVAL_LEN; 529 phdr_len += TIMEVAL_LEN; 530 timing = 1; 531 } 532 packlen = MAXIPLEN + MAXICMPLEN + datalen; 533 packlen = packlen > IP_MAXPACKET ? IP_MAXPACKET : packlen; 534 535 if (!(options & F_PINGFILLED)) 536 for (i = phdr_len; i < datalen; ++i) 537 *datap++ = i; 538 539 ident = getpid() & 0xFFFF; 540 541 if (s < 0) { 542 errno = sockerrno; 543 err(EX_OSERR, "socket"); 544 } 545 hold = 1; 546 if (options & F_SO_DEBUG) 547 (void)setsockopt(s, SOL_SOCKET, SO_DEBUG, (char *)&hold, 548 sizeof(hold)); 549 if (options & F_SO_DONTROUTE) 550 (void)setsockopt(s, SOL_SOCKET, SO_DONTROUTE, (char *)&hold, 551 sizeof(hold)); 552 #ifdef IPSEC 553 #ifdef IPSEC_POLICY_IPSEC 554 if (options & F_POLICY) { 555 char *buf; 556 if (policy_in != NULL) { 557 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 558 if (buf == NULL) 559 errx(EX_CONFIG, "%s", ipsec_strerror()); 560 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 561 buf, ipsec_get_policylen(buf)) < 0) 562 err(EX_CONFIG, 563 "ipsec policy cannot be configured"); 564 free(buf); 565 } 566 567 if (policy_out != NULL) { 568 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 569 if (buf == NULL) 570 errx(EX_CONFIG, "%s", ipsec_strerror()); 571 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 572 buf, ipsec_get_policylen(buf)) < 0) 573 err(EX_CONFIG, 574 "ipsec policy cannot be configured"); 575 free(buf); 576 } 577 } 578 #endif /*IPSEC_POLICY_IPSEC*/ 579 #endif /*IPSEC*/ 580 581 if (options & F_HDRINCL) { 582 ip = (struct ip*)outpackhdr; 583 if (!(options & (F_TTL | F_MTTL))) { 584 mib[0] = CTL_NET; 585 mib[1] = PF_INET; 586 mib[2] = IPPROTO_IP; 587 mib[3] = IPCTL_DEFTTL; 588 sz = sizeof(ttl); 589 if (sysctl(mib, 4, &ttl, &sz, NULL, 0) == -1) 590 err(1, "sysctl(net.inet.ip.ttl)"); 591 } 592 setsockopt(s, IPPROTO_IP, IP_HDRINCL, &hold, sizeof(hold)); 593 ip->ip_v = IPVERSION; 594 ip->ip_hl = sizeof(struct ip) >> 2; 595 ip->ip_tos = tos; 596 ip->ip_id = 0; 597 ip->ip_off = df ? IP_DF : 0; 598 ip->ip_ttl = ttl; 599 ip->ip_p = IPPROTO_ICMP; 600 ip->ip_src.s_addr = source ? sin.sin_addr.s_addr : INADDR_ANY; 601 ip->ip_dst = to->sin_addr; 602 } 603 /* record route option */ 604 if (options & F_RROUTE) { 605 #ifdef IP_OPTIONS 606 bzero(rspace, sizeof(rspace)); 607 rspace[IPOPT_OPTVAL] = IPOPT_RR; 608 rspace[IPOPT_OLEN] = sizeof(rspace) - 1; 609 rspace[IPOPT_OFFSET] = IPOPT_MINOFF; 610 rspace[sizeof(rspace) - 1] = IPOPT_EOL; 611 if (setsockopt(s, IPPROTO_IP, IP_OPTIONS, rspace, 612 sizeof(rspace)) < 0) 613 err(EX_OSERR, "setsockopt IP_OPTIONS"); 614 #else 615 errx(EX_UNAVAILABLE, 616 "record route not available in this implementation"); 617 #endif /* IP_OPTIONS */ 618 } 619 620 if (options & F_TTL) { 621 if (setsockopt(s, IPPROTO_IP, IP_TTL, &ttl, 622 sizeof(ttl)) < 0) { 623 err(EX_OSERR, "setsockopt IP_TTL"); 624 } 625 } 626 if (options & F_NOLOOP) { 627 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, 628 sizeof(loop)) < 0) { 629 err(EX_OSERR, "setsockopt IP_MULTICAST_LOOP"); 630 } 631 } 632 if (options & F_MTTL) { 633 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, &mttl, 634 sizeof(mttl)) < 0) { 635 err(EX_OSERR, "setsockopt IP_MULTICAST_TTL"); 636 } 637 } 638 if (options & F_MIF) { 639 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, &ifaddr, 640 sizeof(ifaddr)) < 0) { 641 err(EX_OSERR, "setsockopt IP_MULTICAST_IF"); 642 } 643 } 644 #ifdef SO_TIMESTAMP 645 { int on = 1; 646 if (setsockopt(s, SOL_SOCKET, SO_TIMESTAMP, &on, sizeof(on)) < 0) 647 err(EX_OSERR, "setsockopt SO_TIMESTAMP"); 648 } 649 #endif 650 651 /* 652 * When pinging the broadcast address, you can get a lot of answers. 653 * Doing something so evil is useful if you are trying to stress the 654 * ethernet, or just want to fill the arp cache to get some stuff for 655 * /etc/ethers. But beware: RFC 1122 allows hosts to ignore broadcast 656 * or multicast pings if they wish. 657 */ 658 659 /* 660 * XXX receive buffer needs undetermined space for mbuf overhead 661 * as well. 662 */ 663 hold = IP_MAXPACKET + 128; 664 (void)setsockopt(s, SOL_SOCKET, SO_RCVBUF, (char *)&hold, 665 sizeof(hold)); 666 if (uid == 0) 667 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, (char *)&hold, 668 sizeof(hold)); 669 670 if (to->sin_family == AF_INET) { 671 (void)printf("PING %s (%s)", hostname, 672 inet_ntoa(to->sin_addr)); 673 if (source) 674 (void)printf(" from %s", shostname); 675 (void)printf(": %d data bytes\n", datalen); 676 } else 677 (void)printf("PING %s: %d data bytes\n", hostname, datalen); 678 679 /* 680 * Use sigaction() instead of signal() to get unambiguous semantics, 681 * in particular with SA_RESTART not set. 682 */ 683 684 sigemptyset(&si_sa.sa_mask); 685 si_sa.sa_flags = 0; 686 687 si_sa.sa_handler = stopit; 688 if (sigaction(SIGINT, &si_sa, 0) == -1) { 689 err(EX_OSERR, "sigaction SIGINT"); 690 } 691 692 si_sa.sa_handler = status; 693 if (sigaction(SIGINFO, &si_sa, 0) == -1) { 694 err(EX_OSERR, "sigaction"); 695 } 696 697 if (alarmtimeout > 0) { 698 si_sa.sa_handler = stopit; 699 if (sigaction(SIGALRM, &si_sa, 0) == -1) 700 err(EX_OSERR, "sigaction SIGALRM"); 701 } 702 703 bzero(&msg, sizeof(msg)); 704 msg.msg_name = (caddr_t)&from; 705 msg.msg_iov = &iov; 706 msg.msg_iovlen = 1; 707 #ifdef SO_TIMESTAMP 708 msg.msg_control = (caddr_t)ctrl; 709 #endif 710 iov.iov_base = packet; 711 iov.iov_len = packlen; 712 713 if (tcgetattr(STDOUT_FILENO, &ts) != -1) { 714 reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 715 ts.c_lflag |= NOKERNINFO; 716 tcsetattr(STDOUT_FILENO, TCSANOW, &ts); 717 } 718 719 if (preload == 0) 720 pinger(); /* send the first ping */ 721 else { 722 if (npackets != 0 && preload > npackets) 723 preload = npackets; 724 while (preload--) /* fire off them quickies */ 725 pinger(); 726 } 727 (void)gettimeofday(&last, NULL); 728 729 if (options & F_FLOOD) { 730 intvl.tv_sec = 0; 731 intvl.tv_usec = 10000; 732 } else { 733 intvl.tv_sec = interval / 1000; 734 intvl.tv_usec = interval % 1000 * 1000; 735 } 736 737 almost_done = 0; 738 while (!finish_up) { 739 struct timeval now, timeout; 740 fd_set rfds; 741 int cc, n; 742 743 check_status(); 744 if (s >= FD_SETSIZE) 745 errx(EX_OSERR, "descriptor too large"); 746 FD_ZERO(&rfds); 747 FD_SET(s, &rfds); 748 (void)gettimeofday(&now, NULL); 749 timeout.tv_sec = last.tv_sec + intvl.tv_sec - now.tv_sec; 750 timeout.tv_usec = last.tv_usec + intvl.tv_usec - now.tv_usec; 751 while (timeout.tv_usec < 0) { 752 timeout.tv_usec += 1000000; 753 timeout.tv_sec--; 754 } 755 while (timeout.tv_usec >= 1000000) { 756 timeout.tv_usec -= 1000000; 757 timeout.tv_sec++; 758 } 759 if (timeout.tv_sec < 0) 760 timeout.tv_sec = timeout.tv_usec = 0; 761 n = select(s + 1, &rfds, NULL, NULL, &timeout); 762 if (n < 0) 763 continue; /* Must be EINTR. */ 764 if (n == 1) { 765 struct timeval *t = NULL; 766 #ifdef SO_TIMESTAMP 767 struct cmsghdr *cmsg = (struct cmsghdr *)&ctrl; 768 769 msg.msg_controllen = sizeof(ctrl); 770 #endif 771 msg.msg_namelen = sizeof(from); 772 if ((cc = recvmsg(s, &msg, 0)) < 0) { 773 if (errno == EINTR) 774 continue; 775 warn("recvmsg"); 776 continue; 777 } 778 #ifdef SO_TIMESTAMP 779 if (cmsg->cmsg_level == SOL_SOCKET && 780 cmsg->cmsg_type == SCM_TIMESTAMP && 781 cmsg->cmsg_len == CMSG_LEN(sizeof *t)) { 782 /* Copy to avoid alignment problems: */ 783 memcpy(&now, CMSG_DATA(cmsg), sizeof(now)); 784 t = &now; 785 } 786 #endif 787 if (t == NULL) { 788 (void)gettimeofday(&now, NULL); 789 t = &now; 790 } 791 pr_pack((char *)packet, cc, &from, t); 792 if (options & F_ONCE && nreceived || 793 npackets && nreceived >= npackets) 794 break; 795 } 796 if (n == 0 || options & F_FLOOD) { 797 if (!npackets || ntransmitted < npackets) 798 pinger(); 799 else { 800 if (almost_done) 801 break; 802 almost_done = 1; 803 intvl.tv_usec = 0; 804 if (nreceived) { 805 intvl.tv_sec = 2 * tmax / 1000; 806 if (!intvl.tv_sec) 807 intvl.tv_sec = 1; 808 } else 809 intvl.tv_sec = MAXWAIT; 810 } 811 (void)gettimeofday(&last, NULL); 812 if (ntransmitted - nreceived - 1 > nmissedmax) { 813 nmissedmax = ntransmitted - nreceived - 1; 814 if (options & F_MISSED) 815 (void)write(STDOUT_FILENO, &BBELL, 1); 816 } 817 } 818 } 819 finish(); 820 /* NOTREACHED */ 821 exit(0); /* Make the compiler happy */ 822 } 823 824 /* 825 * stopit -- 826 * Set the global bit that causes the main loop to quit. 827 * Do NOT call finish() from here, since finish() does far too much 828 * to be called from a signal handler. 829 */ 830 void 831 stopit(sig) 832 int sig __unused; 833 { 834 835 finish_up = 1; 836 } 837 838 /* 839 * pinger -- 840 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 841 * will be added on by the kernel. The ID field is our UNIX process ID, 842 * and the sequence number is an ascending integer. The first TIMEVAL_LEN 843 * bytes of the data portion are used to hold a UNIX "timeval" struct in 844 * host byte-order, to compute the round-trip time. 845 */ 846 static void 847 pinger(void) 848 { 849 struct timeval now; 850 struct ip *ip; 851 struct icmp *icp; 852 int cc, i; 853 u_char *packet; 854 855 packet = outpack; 856 icp = (struct icmp *)outpack; 857 icp->icmp_type = icmp_type; 858 icp->icmp_code = 0; 859 icp->icmp_cksum = 0; 860 icp->icmp_seq = htons(ntransmitted); 861 icp->icmp_id = ident; /* ID */ 862 863 CLR(ntransmitted % mx_dup_ck); 864 865 if ((options & F_TIME) || timing) { 866 (void)gettimeofday(&now, NULL); 867 868 if (options & F_TIME) 869 icp->icmp_otime = htonl((now.tv_sec % (24*60*60)) 870 * 1000 + now.tv_usec / 1000); 871 if (timing) 872 bcopy((void *)&now, (void *)&outpack[MINICMPLEN + timeoffset], 873 sizeof(struct timeval)); 874 } 875 876 cc = MINICMPLEN + datalen + timeoffset; 877 878 /* compute ICMP checksum here */ 879 icp->icmp_cksum = in_cksum((u_short *)icp, cc); 880 881 if (options & F_HDRINCL) { 882 cc += sizeof(struct ip); 883 ip = (struct ip *)outpackhdr; 884 ip->ip_len = cc; 885 ip->ip_sum = in_cksum((u_short *)outpackhdr, cc); 886 packet = outpackhdr; 887 } 888 i = sendto(s, (char *)packet, cc, 0, (struct sockaddr *)&whereto, 889 sizeof(whereto)); 890 891 if (i < 0 || i != cc) { 892 if (i < 0) { 893 if (options & F_FLOOD && errno == ENOBUFS) { 894 usleep(FLOOD_BACKOFF); 895 return; 896 } 897 warn("sendto"); 898 } else { 899 warn("%s: partial write: %d of %d bytes", 900 hostname, i, cc); 901 } 902 } 903 ntransmitted++; 904 if (!(options & F_QUIET) && options & F_FLOOD) 905 (void)write(STDOUT_FILENO, &DOT, 1); 906 } 907 908 /* 909 * pr_pack -- 910 * Print out the packet, if it came from us. This logic is necessary 911 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 912 * which arrive ('tis only fair). This permits multiple copies of this 913 * program to be run without having intermingled output (or statistics!). 914 */ 915 static void 916 pr_pack(buf, cc, from, tv) 917 char *buf; 918 int cc; 919 struct sockaddr_in *from; 920 struct timeval *tv; 921 { 922 struct in_addr ina; 923 u_char *cp, *dp; 924 struct icmp *icp; 925 struct ip *ip; 926 const void *tp; 927 double triptime; 928 int dupflag, hlen, i, j, seq; 929 static int old_rrlen; 930 static char old_rr[MAX_IPOPTLEN]; 931 932 /* Check the IP header */ 933 ip = (struct ip *)buf; 934 hlen = ip->ip_hl << 2; 935 if (cc < hlen + ICMP_MINLEN) { 936 if (options & F_VERBOSE) 937 warn("packet too short (%d bytes) from %s", cc, 938 inet_ntoa(from->sin_addr)); 939 return; 940 } 941 942 /* Now the ICMP part */ 943 cc -= hlen; 944 icp = (struct icmp *)(buf + hlen); 945 if (icp->icmp_type == icmp_type_rsp) { 946 if (icp->icmp_id != ident) 947 return; /* 'Twas not our ECHO */ 948 ++nreceived; 949 triptime = 0.0; 950 if (timing) { 951 struct timeval tv1; 952 #ifndef icmp_data 953 tp = &icp->icmp_ip; 954 #else 955 tp = icp->icmp_data; 956 #endif 957 tp+=timeoffset; 958 959 /* Copy to avoid alignment problems: */ 960 memcpy(&tv1, tp, sizeof(tv1)); 961 tvsub(tv, &tv1); 962 triptime = ((double)tv->tv_sec) * 1000.0 + 963 ((double)tv->tv_usec) / 1000.0; 964 tsum += triptime; 965 tsumsq += triptime * triptime; 966 if (triptime < tmin) 967 tmin = triptime; 968 if (triptime > tmax) 969 tmax = triptime; 970 } 971 972 seq = ntohs(icp->icmp_seq); 973 974 if (TST(seq % mx_dup_ck)) { 975 ++nrepeats; 976 --nreceived; 977 dupflag = 1; 978 } else { 979 SET(seq % mx_dup_ck); 980 dupflag = 0; 981 } 982 983 if (options & F_QUIET) 984 return; 985 986 if (options & F_FLOOD) 987 (void)write(STDOUT_FILENO, &BSPACE, 1); 988 else { 989 (void)printf("%d bytes from %s: icmp_seq=%u", cc, 990 inet_ntoa(*(struct in_addr *)&from->sin_addr.s_addr), 991 seq); 992 (void)printf(" ttl=%d", ip->ip_ttl); 993 if (timing) 994 (void)printf(" time=%.3f ms", triptime); 995 if (dupflag) 996 (void)printf(" (DUP!)"); 997 if (options & F_AUDIBLE) 998 (void)write(STDOUT_FILENO, &BBELL, 1); 999 if (options & F_MASK) { 1000 /* Just prentend this cast isn't ugly */ 1001 (void)printf(" mask=%s", 1002 pr_addr(*(struct in_addr *)&(icp->icmp_mask))); 1003 } 1004 if (options & F_TIME) { 1005 (void)printf(" tso=%s", pr_ntime(icp->icmp_otime)); 1006 (void)printf(" tsr=%s", pr_ntime(icp->icmp_rtime)); 1007 (void)printf(" tst=%s", pr_ntime(icp->icmp_ttime)); 1008 } 1009 /* check the data */ 1010 cp = (u_char*)&icp->icmp_data[phdr_len]; 1011 dp = &outpack[MINICMPLEN + phdr_len]; 1012 for (i = phdr_len; i < datalen; ++i, ++cp, ++dp) { 1013 if (*cp != *dp) { 1014 (void)printf("\nwrong data byte #%d should be 0x%x but was 0x%x", 1015 i, *dp, *cp); 1016 (void)printf("\ncp:"); 1017 cp = (u_char*)&icp->icmp_data[0]; 1018 for (i = 0; i < datalen; ++i, ++cp) { 1019 if ((i % 32) == 8) 1020 (void)printf("\n\t"); 1021 (void)printf("%x ", *cp); 1022 } 1023 (void)printf("\ndp:"); 1024 cp = &outpack[MINICMPLEN]; 1025 for (i = 0; i < datalen; ++i, ++cp) { 1026 if ((i % 32) == 8) 1027 (void)printf("\n\t"); 1028 (void)printf("%x ", *cp); 1029 } 1030 break; 1031 } 1032 } 1033 } 1034 } else { 1035 /* 1036 * We've got something other than an ECHOREPLY. 1037 * See if it's a reply to something that we sent. 1038 * We can compare IP destination, protocol, 1039 * and ICMP type and ID. 1040 * 1041 * Only print all the error messages if we are running 1042 * as root to avoid leaking information not normally 1043 * available to those not running as root. 1044 */ 1045 #ifndef icmp_data 1046 struct ip *oip = &icp->icmp_ip; 1047 #else 1048 struct ip *oip = (struct ip *)icp->icmp_data; 1049 #endif 1050 struct icmp *oicmp = (struct icmp *)(oip + 1); 1051 1052 if (((options & F_VERBOSE) && uid == 0) || 1053 (!(options & F_QUIET2) && 1054 (oip->ip_dst.s_addr == whereto.sin_addr.s_addr) && 1055 (oip->ip_p == IPPROTO_ICMP) && 1056 (oicmp->icmp_type == ICMP_ECHO) && 1057 (oicmp->icmp_id == ident))) { 1058 (void)printf("%d bytes from %s: ", cc, 1059 pr_addr(from->sin_addr)); 1060 pr_icmph(icp); 1061 } else 1062 return; 1063 } 1064 1065 /* Display any IP options */ 1066 cp = (u_char *)buf + sizeof(struct ip); 1067 1068 for (; hlen > (int)sizeof(struct ip); --hlen, ++cp) 1069 switch (*cp) { 1070 case IPOPT_EOL: 1071 hlen = 0; 1072 break; 1073 case IPOPT_LSRR: 1074 case IPOPT_SSRR: 1075 (void)printf(*cp == IPOPT_LSRR ? 1076 "\nLSRR: " : "\nSSRR: "); 1077 j = cp[IPOPT_OLEN] - IPOPT_MINOFF + 1; 1078 hlen -= 2; 1079 cp += 2; 1080 if (j >= INADDR_LEN && 1081 j <= hlen - (int)sizeof(struct ip)) { 1082 for (;;) { 1083 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1084 if (ina.s_addr == 0) 1085 (void)printf("\t0.0.0.0"); 1086 else 1087 (void)printf("\t%s", 1088 pr_addr(ina)); 1089 hlen -= INADDR_LEN; 1090 cp += INADDR_LEN - 1; 1091 j -= INADDR_LEN; 1092 if (j < INADDR_LEN) 1093 break; 1094 (void)putchar('\n'); 1095 } 1096 } else 1097 (void)printf("\t(truncated route)\n"); 1098 break; 1099 case IPOPT_RR: 1100 j = cp[IPOPT_OLEN]; /* get length */ 1101 i = cp[IPOPT_OFFSET]; /* and pointer */ 1102 hlen -= 2; 1103 cp += 2; 1104 if (i > j) 1105 i = j; 1106 i = i - IPOPT_MINOFF + 1; 1107 if (i < 0 || i > (hlen - (int)sizeof(struct ip))) { 1108 old_rrlen = 0; 1109 continue; 1110 } 1111 if (i == old_rrlen 1112 && !bcmp((char *)cp, old_rr, i) 1113 && !(options & F_FLOOD)) { 1114 (void)printf("\t(same route)"); 1115 hlen -= i; 1116 cp += i; 1117 break; 1118 } 1119 old_rrlen = i; 1120 bcopy((char *)cp, old_rr, i); 1121 (void)printf("\nRR: "); 1122 if (i >= INADDR_LEN && 1123 i <= hlen - (int)sizeof(struct ip)) { 1124 for (;;) { 1125 bcopy(++cp, &ina.s_addr, INADDR_LEN); 1126 if (ina.s_addr == 0) 1127 (void)printf("\t0.0.0.0"); 1128 else 1129 (void)printf("\t%s", 1130 pr_addr(ina)); 1131 hlen -= INADDR_LEN; 1132 cp += INADDR_LEN - 1; 1133 i -= INADDR_LEN; 1134 if (i < INADDR_LEN) 1135 break; 1136 (void)putchar('\n'); 1137 } 1138 } else 1139 (void)printf("\t(truncated route)"); 1140 break; 1141 case IPOPT_NOP: 1142 (void)printf("\nNOP"); 1143 break; 1144 default: 1145 (void)printf("\nunknown option %x", *cp); 1146 break; 1147 } 1148 if (!(options & F_FLOOD)) { 1149 (void)putchar('\n'); 1150 (void)fflush(stdout); 1151 } 1152 } 1153 1154 /* 1155 * in_cksum -- 1156 * Checksum routine for Internet Protocol family headers (C Version) 1157 */ 1158 u_short 1159 in_cksum(addr, len) 1160 u_short *addr; 1161 int len; 1162 { 1163 int nleft, sum; 1164 u_short *w; 1165 union { 1166 u_short us; 1167 u_char uc[2]; 1168 } last; 1169 u_short answer; 1170 1171 nleft = len; 1172 sum = 0; 1173 w = addr; 1174 1175 /* 1176 * Our algorithm is simple, using a 32 bit accumulator (sum), we add 1177 * sequential 16 bit words to it, and at the end, fold back all the 1178 * carry bits from the top 16 bits into the lower 16 bits. 1179 */ 1180 while (nleft > 1) { 1181 sum += *w++; 1182 nleft -= 2; 1183 } 1184 1185 /* mop up an odd byte, if necessary */ 1186 if (nleft == 1) { 1187 last.uc[0] = *(u_char *)w; 1188 last.uc[1] = 0; 1189 sum += last.us; 1190 } 1191 1192 /* add back carry outs from top 16 bits to low 16 bits */ 1193 sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */ 1194 sum += (sum >> 16); /* add carry */ 1195 answer = ~sum; /* truncate to 16 bits */ 1196 return(answer); 1197 } 1198 1199 /* 1200 * tvsub -- 1201 * Subtract 2 timeval structs: out = out - in. Out is assumed to 1202 * be >= in. 1203 */ 1204 static void 1205 tvsub(out, in) 1206 struct timeval *out, *in; 1207 { 1208 1209 if ((out->tv_usec -= in->tv_usec) < 0) { 1210 --out->tv_sec; 1211 out->tv_usec += 1000000; 1212 } 1213 out->tv_sec -= in->tv_sec; 1214 } 1215 1216 /* 1217 * status -- 1218 * Print out statistics when SIGINFO is received. 1219 */ 1220 1221 static void 1222 status(sig) 1223 int sig __unused; 1224 { 1225 1226 siginfo_p = 1; 1227 } 1228 1229 static void 1230 check_status() 1231 { 1232 1233 if (siginfo_p) { 1234 siginfo_p = 0; 1235 (void)fprintf(stderr, 1236 "\r%ld/%ld packets received (%.0f%%) %.3f min / %.3f avg / %.3f max\n", 1237 nreceived, ntransmitted, 1238 ntransmitted ? nreceived * 100.0 / ntransmitted : 0.0, 1239 nreceived ? tmin : 0.0, 1240 nreceived + nrepeats ? tsum / (nreceived + nrepeats) : tsum, 1241 tmax); 1242 } 1243 } 1244 1245 /* 1246 * finish -- 1247 * Print out statistics, and give up. 1248 */ 1249 static void 1250 finish() 1251 { 1252 struct termios ts; 1253 1254 (void)signal(SIGINT, SIG_IGN); 1255 (void)signal(SIGALRM, SIG_IGN); 1256 (void)putchar('\n'); 1257 (void)fflush(stdout); 1258 (void)printf("--- %s ping statistics ---\n", hostname); 1259 (void)printf("%ld packets transmitted, ", ntransmitted); 1260 (void)printf("%ld packets received, ", nreceived); 1261 if (nrepeats) 1262 (void)printf("+%ld duplicates, ", nrepeats); 1263 if (ntransmitted) { 1264 if (nreceived > ntransmitted) 1265 (void)printf("-- somebody's printing up packets!"); 1266 else 1267 (void)printf("%d%% packet loss", 1268 (int)(((ntransmitted - nreceived) * 100) / 1269 ntransmitted)); 1270 } 1271 (void)putchar('\n'); 1272 if (nreceived && timing) { 1273 double n = nreceived + nrepeats; 1274 double avg = tsum / n; 1275 double vari = tsumsq / n - avg * avg; 1276 (void)printf( 1277 "round-trip min/avg/max/stddev = %.3f/%.3f/%.3f/%.3f ms\n", 1278 tmin, avg, tmax, sqrt(vari)); 1279 } 1280 if (reset_kerninfo && tcgetattr(STDOUT_FILENO, &ts) != -1) { 1281 ts.c_lflag &= ~NOKERNINFO; 1282 tcsetattr(STDOUT_FILENO, TCSANOW, &ts); 1283 } 1284 1285 if (nreceived) 1286 exit(0); 1287 else 1288 exit(2); 1289 } 1290 1291 #ifdef notdef 1292 static char *ttab[] = { 1293 "Echo Reply", /* ip + seq + udata */ 1294 "Dest Unreachable", /* net, host, proto, port, frag, sr + IP */ 1295 "Source Quench", /* IP */ 1296 "Redirect", /* redirect type, gateway, + IP */ 1297 "Echo", 1298 "Time Exceeded", /* transit, frag reassem + IP */ 1299 "Parameter Problem", /* pointer + IP */ 1300 "Timestamp", /* id + seq + three timestamps */ 1301 "Timestamp Reply", /* " */ 1302 "Info Request", /* id + sq */ 1303 "Info Reply" /* " */ 1304 }; 1305 #endif 1306 1307 /* 1308 * pr_icmph -- 1309 * Print a descriptive string about an ICMP header. 1310 */ 1311 static void 1312 pr_icmph(icp) 1313 struct icmp *icp; 1314 { 1315 1316 switch(icp->icmp_type) { 1317 case ICMP_ECHOREPLY: 1318 (void)printf("Echo Reply\n"); 1319 /* XXX ID + Seq + Data */ 1320 break; 1321 case ICMP_UNREACH: 1322 switch(icp->icmp_code) { 1323 case ICMP_UNREACH_NET: 1324 (void)printf("Destination Net Unreachable\n"); 1325 break; 1326 case ICMP_UNREACH_HOST: 1327 (void)printf("Destination Host Unreachable\n"); 1328 break; 1329 case ICMP_UNREACH_PROTOCOL: 1330 (void)printf("Destination Protocol Unreachable\n"); 1331 break; 1332 case ICMP_UNREACH_PORT: 1333 (void)printf("Destination Port Unreachable\n"); 1334 break; 1335 case ICMP_UNREACH_NEEDFRAG: 1336 (void)printf("frag needed and DF set (MTU %d)\n", 1337 ntohs(icp->icmp_nextmtu)); 1338 break; 1339 case ICMP_UNREACH_SRCFAIL: 1340 (void)printf("Source Route Failed\n"); 1341 break; 1342 case ICMP_UNREACH_FILTER_PROHIB: 1343 (void)printf("Communication prohibited by filter\n"); 1344 break; 1345 default: 1346 (void)printf("Dest Unreachable, Bad Code: %d\n", 1347 icp->icmp_code); 1348 break; 1349 } 1350 /* Print returned IP header information */ 1351 #ifndef icmp_data 1352 pr_retip(&icp->icmp_ip); 1353 #else 1354 pr_retip((struct ip *)icp->icmp_data); 1355 #endif 1356 break; 1357 case ICMP_SOURCEQUENCH: 1358 (void)printf("Source Quench\n"); 1359 #ifndef icmp_data 1360 pr_retip(&icp->icmp_ip); 1361 #else 1362 pr_retip((struct ip *)icp->icmp_data); 1363 #endif 1364 break; 1365 case ICMP_REDIRECT: 1366 switch(icp->icmp_code) { 1367 case ICMP_REDIRECT_NET: 1368 (void)printf("Redirect Network"); 1369 break; 1370 case ICMP_REDIRECT_HOST: 1371 (void)printf("Redirect Host"); 1372 break; 1373 case ICMP_REDIRECT_TOSNET: 1374 (void)printf("Redirect Type of Service and Network"); 1375 break; 1376 case ICMP_REDIRECT_TOSHOST: 1377 (void)printf("Redirect Type of Service and Host"); 1378 break; 1379 default: 1380 (void)printf("Redirect, Bad Code: %d", icp->icmp_code); 1381 break; 1382 } 1383 (void)printf("(New addr: %s)\n", inet_ntoa(icp->icmp_gwaddr)); 1384 #ifndef icmp_data 1385 pr_retip(&icp->icmp_ip); 1386 #else 1387 pr_retip((struct ip *)icp->icmp_data); 1388 #endif 1389 break; 1390 case ICMP_ECHO: 1391 (void)printf("Echo Request\n"); 1392 /* XXX ID + Seq + Data */ 1393 break; 1394 case ICMP_TIMXCEED: 1395 switch(icp->icmp_code) { 1396 case ICMP_TIMXCEED_INTRANS: 1397 (void)printf("Time to live exceeded\n"); 1398 break; 1399 case ICMP_TIMXCEED_REASS: 1400 (void)printf("Frag reassembly time exceeded\n"); 1401 break; 1402 default: 1403 (void)printf("Time exceeded, Bad Code: %d\n", 1404 icp->icmp_code); 1405 break; 1406 } 1407 #ifndef icmp_data 1408 pr_retip(&icp->icmp_ip); 1409 #else 1410 pr_retip((struct ip *)icp->icmp_data); 1411 #endif 1412 break; 1413 case ICMP_PARAMPROB: 1414 (void)printf("Parameter problem: pointer = 0x%02x\n", 1415 icp->icmp_hun.ih_pptr); 1416 #ifndef icmp_data 1417 pr_retip(&icp->icmp_ip); 1418 #else 1419 pr_retip((struct ip *)icp->icmp_data); 1420 #endif 1421 break; 1422 case ICMP_TSTAMP: 1423 (void)printf("Timestamp\n"); 1424 /* XXX ID + Seq + 3 timestamps */ 1425 break; 1426 case ICMP_TSTAMPREPLY: 1427 (void)printf("Timestamp Reply\n"); 1428 /* XXX ID + Seq + 3 timestamps */ 1429 break; 1430 case ICMP_IREQ: 1431 (void)printf("Information Request\n"); 1432 /* XXX ID + Seq */ 1433 break; 1434 case ICMP_IREQREPLY: 1435 (void)printf("Information Reply\n"); 1436 /* XXX ID + Seq */ 1437 break; 1438 case ICMP_MASKREQ: 1439 (void)printf("Address Mask Request\n"); 1440 break; 1441 case ICMP_MASKREPLY: 1442 (void)printf("Address Mask Reply\n"); 1443 break; 1444 case ICMP_ROUTERADVERT: 1445 (void)printf("Router Advertisement\n"); 1446 break; 1447 case ICMP_ROUTERSOLICIT: 1448 (void)printf("Router Solicitation\n"); 1449 break; 1450 default: 1451 (void)printf("Bad ICMP type: %d\n", icp->icmp_type); 1452 } 1453 } 1454 1455 /* 1456 * pr_iph -- 1457 * Print an IP header with options. 1458 */ 1459 static void 1460 pr_iph(ip) 1461 struct ip *ip; 1462 { 1463 u_char *cp; 1464 int hlen; 1465 1466 hlen = ip->ip_hl << 2; 1467 cp = (u_char *)ip + 20; /* point to options */ 1468 1469 (void)printf("Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1470 (void)printf(" %1x %1x %02x %04x %04x", 1471 ip->ip_v, ip->ip_hl, ip->ip_tos, ntohs(ip->ip_len), 1472 ntohs(ip->ip_id)); 1473 (void)printf(" %1lx %04lx", 1474 (u_long) (ntohl(ip->ip_off) & 0xe000) >> 13, 1475 (u_long) ntohl(ip->ip_off) & 0x1fff); 1476 (void)printf(" %02x %02x %04x", ip->ip_ttl, ip->ip_p, 1477 ntohs(ip->ip_sum)); 1478 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1479 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1480 /* dump any option bytes */ 1481 while (hlen-- > 20) { 1482 (void)printf("%02x", *cp++); 1483 } 1484 (void)putchar('\n'); 1485 } 1486 1487 /* 1488 * pr_addr -- 1489 * Return an ascii host address as a dotted quad and optionally with 1490 * a hostname. 1491 */ 1492 static char * 1493 pr_addr(ina) 1494 struct in_addr ina; 1495 { 1496 struct hostent *hp; 1497 static char buf[16 + 3 + MAXHOSTNAMELEN]; 1498 1499 if ((options & F_NUMERIC) || 1500 !(hp = gethostbyaddr((char *)&ina, 4, AF_INET))) 1501 return inet_ntoa(ina); 1502 else 1503 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1504 inet_ntoa(ina)); 1505 return(buf); 1506 } 1507 1508 /* 1509 * pr_retip -- 1510 * Dump some info on a returned (via ICMP) IP packet. 1511 */ 1512 static void 1513 pr_retip(ip) 1514 struct ip *ip; 1515 { 1516 u_char *cp; 1517 int hlen; 1518 1519 pr_iph(ip); 1520 hlen = ip->ip_hl << 2; 1521 cp = (u_char *)ip + hlen; 1522 1523 if (ip->ip_p == 6) 1524 (void)printf("TCP: from port %u, to port %u (decimal)\n", 1525 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1526 else if (ip->ip_p == 17) 1527 (void)printf("UDP: from port %u, to port %u (decimal)\n", 1528 (*cp * 256 + *(cp + 1)), (*(cp + 2) * 256 + *(cp + 3))); 1529 } 1530 1531 static char * 1532 pr_ntime (n_time time) 1533 { 1534 static char buf[10]; 1535 int h, m, s; 1536 1537 s = ntohl(time) / 1000; 1538 h = s / 60 / 60; 1539 m = (s % (60 * 60)) / 60; 1540 s = (s % (60 * 60)) % 60; 1541 1542 (void)snprintf(buf, sizeof(buf), "%02d:%02d:%02d", h, m, s); 1543 1544 return (buf); 1545 } 1546 1547 static void 1548 fill(bp, patp) 1549 char *bp, *patp; 1550 { 1551 char *cp; 1552 int pat[16]; 1553 u_int ii, jj, kk; 1554 1555 for (cp = patp; *cp; cp++) { 1556 if (!isxdigit(*cp)) 1557 errx(EX_USAGE, 1558 "patterns must be specified as hex digits"); 1559 1560 } 1561 ii = sscanf(patp, 1562 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1563 &pat[0], &pat[1], &pat[2], &pat[3], &pat[4], &pat[5], &pat[6], 1564 &pat[7], &pat[8], &pat[9], &pat[10], &pat[11], &pat[12], 1565 &pat[13], &pat[14], &pat[15]); 1566 1567 if (ii > 0) 1568 for (kk = 0; kk <= maxpayload - (phdr_len + ii); kk += ii) 1569 for (jj = 0; jj < ii; ++jj) 1570 bp[jj + kk] = pat[jj]; 1571 if (!(options & F_QUIET)) { 1572 (void)printf("PATTERN: 0x"); 1573 for (jj = 0; jj < ii; ++jj) 1574 (void)printf("%02x", bp[jj] & 0xFF); 1575 (void)printf("\n"); 1576 } 1577 } 1578 1579 static void 1580 usage() 1581 { 1582 (void)fprintf(stderr, "%s\n%s\n%s\n", 1583 "usage: ping [-AaDdfnoQqRrv] [-c count] [-i wait] [-l preload]", 1584 " [-M mask | time] [-m ttl] [-p pattern] " 1585 #ifdef IPSEC 1586 #ifdef IPSEC_POLICY_IPSEC 1587 "[-P policy] " 1588 #endif 1589 #endif 1590 "[-S src_addr]", 1591 " [-s packetsize] [-t timeout] [-z tos]", 1592 " [host | [-L] [-I iface] [-T ttl] mcast-group]"); 1593 exit(EX_USAGE); 1594 } 1595