1 /* $NetBSD: ping.c,v 1.90 2009/11/02 00:47:09 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Muuss. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * P I N G . C 37 * 38 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, 39 * measure round-trip-delays and packet loss across network paths. 40 * 41 * Author - 42 * Mike Muuss 43 * U. S. Army Ballistic Research Laboratory 44 * December, 1983 45 * Modified at Uc Berkeley 46 * Record Route and verbose headers - Phil Dykstra, BRL, March 1988. 47 * Multicast options (ttl, if, loop) - Steve Deering, Stanford, August 1988. 48 * ttl, duplicate detection - Cliff Frost, UCB, April 1989 49 * Pad pattern - Cliff Frost (from Tom Ferrin, UCSF), April 1989 50 * 51 * Status - 52 * Public Domain. Distribution Unlimited. 53 * 54 * Bugs - 55 * More statistics could always be gathered. 56 * This program has to run SUID to ROOT to access the ICMP socket. 57 */ 58 59 #include <sys/cdefs.h> 60 #ifndef lint 61 __RCSID("$NetBSD: ping.c,v 1.90 2009/11/02 00:47:09 christos Exp $"); 62 #endif 63 64 #include <stdio.h> 65 #include <stddef.h> 66 #include <errno.h> 67 #include <signal.h> 68 #include <sys/time.h> 69 #include <sys/types.h> 70 #include <sys/param.h> 71 #include <sys/socket.h> 72 #include <sys/file.h> 73 #include <termios.h> 74 #include <stdlib.h> 75 #include <unistd.h> 76 #include <poll.h> 77 #include <limits.h> 78 #include <math.h> 79 #include <string.h> 80 #include <err.h> 81 82 #include <netinet/in_systm.h> 83 #include <netinet/in.h> 84 #include <netinet/ip.h> 85 #include <netinet/ip_icmp.h> 86 #include <netinet/ip_var.h> 87 #include <arpa/inet.h> 88 #include <ctype.h> 89 #include <netdb.h> 90 91 #ifdef IPSEC 92 #include <netinet6/ipsec.h> 93 #endif /*IPSEC*/ 94 95 #define FLOOD_INTVL 0.01 /* default flood output interval */ 96 #define MAXPACKET (IP_MAXPACKET-60-8) /* max packet size */ 97 98 #define F_VERBOSE 0x0001 99 #define F_QUIET 0x0002 /* minimize all output */ 100 #define F_SEMI_QUIET 0x0004 /* ignore our ICMP errors */ 101 #define F_FLOOD 0x0008 /* flood-ping */ 102 #define F_RECORD_ROUTE 0x0010 /* record route */ 103 #define F_SOURCE_ROUTE 0x0020 /* loose source route */ 104 #define F_PING_FILLED 0x0040 /* is buffer filled with user data? */ 105 #define F_PING_RANDOM 0x0080 /* use random data */ 106 #define F_NUMERIC 0x0100 /* do not do gethostbyaddr() calls */ 107 #define F_TIMING 0x0200 /* room for a timestamp */ 108 #define F_DF 0x0400 /* set IP DF bit */ 109 #define F_SOURCE_ADDR 0x0800 /* set source IP address/interface */ 110 #define F_ONCE 0x1000 /* exit(0) after receiving 1 reply */ 111 #define F_MCAST 0x2000 /* multicast target */ 112 #define F_MCAST_NOLOOP 0x4000 /* no multicast loopback */ 113 #define F_AUDIBLE 0x8000 /* audible output */ 114 #ifdef IPSEC 115 #ifdef IPSEC_POLICY_IPSEC 116 #define F_POLICY 0x10000 117 #else 118 #define F_AUTHHDR 0x10000 119 #define F_ENCRYPT 0x20000 120 #endif /*IPSEC_POLICY_IPSEC*/ 121 #endif /*IPSEC*/ 122 123 124 /* MAX_DUP_CHK is the number of bits in received table, the 125 * maximum number of received sequence numbers we can track to check 126 * for duplicates. 127 */ 128 #define MAX_DUP_CHK (8 * 2048) 129 u_char rcvd_tbl[MAX_DUP_CHK/8]; 130 int nrepeats = 0; 131 #define A(seq) rcvd_tbl[(seq/8)%sizeof(rcvd_tbl)] /* byte in array */ 132 #define B(seq) (1 << (seq & 0x07)) /* bit in byte */ 133 #define SET(seq) (A(seq) |= B(seq)) 134 #define CLR(seq) (A(seq) &= (~B(seq))) 135 #define TST(seq) (A(seq) & B(seq)) 136 137 struct tv32 { 138 int32_t tv32_sec; 139 int32_t tv32_usec; 140 }; 141 142 143 u_char *packet; 144 int packlen; 145 int pingflags = 0, options; 146 int pongflags = 0; 147 char *fill_pat; 148 149 int s; /* Socket file descriptor */ 150 int sloop; /* Socket file descriptor/loopback */ 151 152 #define PHDR_LEN sizeof(struct tv32) /* size of timestamp header */ 153 struct sockaddr_in whereto, send_addr; /* Who to ping */ 154 struct sockaddr_in src_addr; /* from where */ 155 struct sockaddr_in loc_addr; /* 127.1 */ 156 int datalen = 64 - PHDR_LEN; /* How much data */ 157 158 #ifndef __NetBSD__ 159 static char *progname; 160 #define getprogname() (progname) 161 #define setprogname(name) ((void)(progname = (name))) 162 #endif 163 164 char hostname[MAXHOSTNAMELEN]; 165 166 static struct { 167 struct ip o_ip; 168 char o_opt[MAX_IPOPTLEN]; 169 union { 170 u_char u_buf[MAXPACKET+offsetof(struct icmp, icmp_data)]; 171 struct icmp u_icmp; 172 } o_u; 173 } out_pack; 174 #define opack_icmp out_pack.o_u.u_icmp 175 struct ip *opack_ip; 176 177 char optspace[MAX_IPOPTLEN]; /* record route space */ 178 int optlen; 179 180 181 int npackets; /* total packets to send */ 182 int preload; /* number of packets to "preload" */ 183 int ntransmitted; /* output sequence # = #sent */ 184 int ident; /* our ID, in network byte order */ 185 186 int nreceived; /* # of packets we got back */ 187 188 double interval; /* interval between packets */ 189 struct timeval interval_tv; 190 double tmin = 999999999.0; 191 double tmax = 0.0; 192 double tsum = 0.0; /* sum of all times */ 193 double tsumsq = 0.0; 194 double maxwait = 0.0; 195 196 int bufspace = IP_MAXPACKET; 197 198 struct timeval now, clear_cache, last_tx, next_tx, first_tx; 199 struct timeval last_rx, first_rx; 200 int lastrcvd = 1; /* last ping sent has been received */ 201 202 static struct timeval jiggle_time; 203 static int jiggle_cnt, total_jiggled, jiggle_direction = -1; 204 205 static void doit(void); 206 static void prefinish(int); 207 static void prtsig(int); 208 static void finish(int); 209 static void summary(int); 210 static void pinger(void); 211 static void fill(void); 212 static void rnd_fill(void); 213 static double diffsec(struct timeval *, struct timeval *); 214 static void timevaladd(struct timeval *, struct timeval *); 215 static void sec_to_timeval(const double, struct timeval *); 216 static double timeval_to_sec(const struct timeval *); 217 static void pr_pack(u_char *, int, struct sockaddr_in *); 218 static u_int16_t in_cksum(u_int16_t *, u_int); 219 static void pr_saddr(u_char *); 220 static char *pr_addr(struct in_addr *); 221 static void pr_iph(struct icmp *, int); 222 static void pr_retip(struct icmp *, int); 223 static int pr_icmph(struct icmp *, struct sockaddr_in *, int); 224 static void jiggle(int), jiggle_flush(int); 225 static void gethost(const char *, const char *, 226 struct sockaddr_in *, char *, int); 227 static void usage(void); 228 229 int 230 main(int argc, char *argv[]) 231 { 232 int c, i, on = 1, hostind = 0; 233 long l; 234 u_char ttl = 0; 235 u_long tos = 0; 236 char *p; 237 #ifdef IPSEC 238 #ifdef IPSEC_POLICY_IPSEC 239 char *policy_in = NULL; 240 char *policy_out = NULL; 241 #endif 242 #endif 243 #ifdef SIGINFO 244 struct sigaction sa; 245 #endif 246 247 if ((s = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 248 err(1, "Cannot create socket"); 249 if ((sloop = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 250 err(1, "Cannot create socket"); 251 252 /* 253 * sloop is never read on. This prevents packets from 254 * queueing in its recv buffer. 255 */ 256 if (shutdown(sloop, SHUT_RD) == -1) 257 warn("Cannot shutdown for read"); 258 259 if (setuid(getuid()) == -1) 260 err(1, "setuid"); 261 262 setprogname(argv[0]); 263 264 #ifndef IPSEC 265 #define IPSECOPT 266 #else 267 #ifdef IPSEC_POLICY_IPSEC 268 #define IPSECOPT "E:" 269 #else 270 #define IPSECOPT "AE" 271 #endif /*IPSEC_POLICY_IPSEC*/ 272 #endif 273 while ((c = getopt(argc, argv, 274 "ac:dDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 275 #undef IPSECOPT 276 switch (c) { 277 case 'a': 278 pingflags |= F_AUDIBLE; 279 break; 280 case 'c': 281 npackets = strtol(optarg, &p, 0); 282 if (*p != '\0' || npackets <= 0) 283 errx(1, "Bad/invalid number of packets"); 284 break; 285 case 'D': 286 pingflags |= F_DF; 287 break; 288 case 'd': 289 options |= SO_DEBUG; 290 break; 291 case 'f': 292 pingflags |= F_FLOOD; 293 break; 294 case 'h': 295 hostind = optind-1; 296 break; 297 case 'i': /* wait between sending packets */ 298 interval = strtod(optarg, &p); 299 if (*p != '\0' || interval <= 0) 300 errx(1, "Bad/invalid interval %s", optarg); 301 break; 302 case 'l': 303 preload = strtol(optarg, &p, 0); 304 if (*p != '\0' || preload < 0) 305 errx(1, "Bad/invalid preload value %s", 306 optarg); 307 break; 308 case 'n': 309 pingflags |= F_NUMERIC; 310 break; 311 case 'o': 312 pingflags |= F_ONCE; 313 break; 314 case 'p': /* fill buffer with user pattern */ 315 if (pingflags & F_PING_RANDOM) 316 errx(1, "Only one of -P and -p allowed"); 317 pingflags |= F_PING_FILLED; 318 fill_pat = optarg; 319 break; 320 case 'P': 321 if (pingflags & F_PING_FILLED) 322 errx(1, "Only one of -P and -p allowed"); 323 pingflags |= F_PING_RANDOM; 324 break; 325 case 'q': 326 pingflags |= F_QUIET; 327 break; 328 case 'Q': 329 pingflags |= F_SEMI_QUIET; 330 break; 331 case 'r': 332 options |= SO_DONTROUTE; 333 break; 334 case 's': /* size of packet to send */ 335 l = strtol(optarg, &p, 0); 336 if (*p != '\0' || l < 0) 337 errx(1, "Bad/invalid packet size %s", optarg); 338 if (l > MAXPACKET) 339 errx(1, "packet size is too large"); 340 datalen = (int)l; 341 break; 342 case 'v': 343 pingflags |= F_VERBOSE; 344 break; 345 case 'R': 346 pingflags |= F_RECORD_ROUTE; 347 break; 348 case 'L': 349 pingflags |= F_MCAST_NOLOOP; 350 break; 351 case 't': 352 tos = strtoul(optarg, &p, 0); 353 if (*p != '\0' || tos > 0xFF) 354 errx(1, "bad tos value: %s", optarg); 355 break; 356 case 'T': 357 l = strtol(optarg, &p, 0); 358 if (*p != '\0' || l > 255 || l <= 0) 359 errx(1, "ttl out of range"); 360 ttl = (u_char)l; /* cannot check >255 otherwise */ 361 break; 362 case 'I': 363 pingflags |= F_SOURCE_ADDR; 364 gethost("-I", optarg, &src_addr, 0, 0); 365 break; 366 case 'g': 367 pingflags |= F_SOURCE_ROUTE; 368 gethost("-g", optarg, &send_addr, 0, 0); 369 break; 370 case 'w': 371 maxwait = strtod(optarg, &p); 372 if (*p != '\0' || maxwait <= 0) 373 errx(1, "Bad/invalid maxwait time %s", optarg); 374 break; 375 #ifdef IPSEC 376 #ifdef IPSEC_POLICY_IPSEC 377 case 'E': 378 pingflags |= F_POLICY; 379 if (!strncmp("in", optarg, 2)) { 380 policy_in = strdup(optarg); 381 if (!policy_in) 382 err(1, "strdup"); 383 } else if (!strncmp("out", optarg, 3)) { 384 policy_out = strdup(optarg); 385 if (!policy_out) 386 err(1, "strdup"); 387 } else 388 errx(1, "invalid security policy"); 389 break; 390 #else 391 case 'A': 392 pingflags |= F_AUTHHDR; 393 break; 394 case 'E': 395 pingflags |= F_ENCRYPT; 396 break; 397 #endif /*IPSEC_POLICY_IPSEC*/ 398 #endif /*IPSEC*/ 399 default: 400 usage(); 401 break; 402 } 403 } 404 405 if (interval == 0) 406 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 407 #ifndef sgi 408 if (pingflags & F_FLOOD && getuid()) 409 errx(1, "Must be superuser to use -f"); 410 if (interval < 1.0 && getuid()) 411 errx(1, "Must be superuser to use < 1 sec ping interval"); 412 if (preload > 0 && getuid()) 413 errx(1, "Must be superuser to use -l"); 414 #endif 415 sec_to_timeval(interval, &interval_tv); 416 417 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 418 warnx("Sorry, no audible output for flood pings"); 419 420 if (npackets != 0) { 421 npackets += preload; 422 } else { 423 npackets = INT_MAX; 424 } 425 426 if (hostind == 0) { 427 if (optind != argc-1) 428 usage(); 429 else 430 hostind = optind; 431 } 432 else if (hostind >= argc - 1) 433 usage(); 434 435 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 436 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 437 pingflags |= F_MCAST; 438 if (!(pingflags & F_SOURCE_ROUTE)) 439 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 440 441 loc_addr.sin_family = AF_INET; 442 loc_addr.sin_len = sizeof(struct sockaddr_in); 443 loc_addr.sin_addr.s_addr = htonl((127<<24)+1); 444 445 if (datalen >= (int)PHDR_LEN) /* can we time them? */ 446 pingflags |= F_TIMING; 447 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 448 if ((packet = (u_char *)malloc(packlen)) == NULL) 449 err(1, "Out of memory"); 450 451 if (pingflags & F_PING_FILLED) { 452 fill(); 453 } else if (pingflags & F_PING_RANDOM) { 454 rnd_fill(); 455 } else { 456 for (i = PHDR_LEN; i < datalen; i++) 457 opack_icmp.icmp_data[i] = i; 458 } 459 460 ident = arc4random() & 0xFFFF; 461 462 if (options & SO_DEBUG) { 463 if (setsockopt(s, SOL_SOCKET, SO_DEBUG, 464 (char *)&on, sizeof(on)) == -1) 465 warn("Can't turn on socket debugging"); 466 } 467 if (options & SO_DONTROUTE) { 468 if (setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 469 (char *)&on, sizeof(on)) == -1) 470 warn("SO_DONTROUTE"); 471 } 472 473 if (options & SO_DEBUG) { 474 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 475 (char *)&on, sizeof(on)) == -1) 476 warn("Can't turn on socket debugging"); 477 } 478 if (options & SO_DONTROUTE) { 479 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 480 (char *)&on, sizeof(on)) == -1) 481 warn("SO_DONTROUTE"); 482 } 483 484 if (pingflags & F_SOURCE_ROUTE) { 485 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 486 optspace[IPOPT_OLEN] = optlen = 7; 487 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 488 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 489 sizeof(whereto.sin_addr)); 490 optspace[optlen++] = IPOPT_NOP; 491 } 492 if (pingflags & F_RECORD_ROUTE) { 493 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 494 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 495 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 496 optlen = MAX_IPOPTLEN; 497 } 498 /* this leaves opack_ip 0(mod 4) aligned */ 499 opack_ip = (struct ip *)((char *)&out_pack.o_ip 500 + sizeof(out_pack.o_opt) 501 - optlen); 502 (void) memcpy(opack_ip + 1, optspace, optlen); 503 504 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 505 err(1, "Can't set special IP header"); 506 507 opack_ip->ip_v = IPVERSION; 508 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 509 opack_ip->ip_tos = tos; 510 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 511 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 512 opack_ip->ip_p = IPPROTO_ICMP; 513 opack_ip->ip_src = src_addr.sin_addr; 514 opack_ip->ip_dst = send_addr.sin_addr; 515 516 if (pingflags & F_MCAST) { 517 if (pingflags & F_MCAST_NOLOOP) { 518 u_char loop = 0; 519 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 520 (char *) &loop, 1) < 0) 521 err(1, "Can't disable multicast loopback"); 522 } 523 524 if (ttl != 0 525 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 526 (char *) &ttl, 1) < 0) 527 err(1, "Can't set multicast time-to-live"); 528 529 if ((pingflags & F_SOURCE_ADDR) 530 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 531 (char *) &src_addr.sin_addr, 532 sizeof(src_addr.sin_addr)) < 0) 533 err(1, "Can't set multicast source interface"); 534 535 } else if (pingflags & F_SOURCE_ADDR) { 536 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 537 (char *) &src_addr.sin_addr, 538 sizeof(src_addr.sin_addr)) < 0) 539 err(1, "Can't set source interface/address"); 540 } 541 #ifdef IPSEC 542 #ifdef IPSEC_POLICY_IPSEC 543 { 544 char *buf; 545 if (pingflags & F_POLICY) { 546 if (policy_in != NULL) { 547 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 548 if (buf == NULL) 549 errx(1, "%s", ipsec_strerror()); 550 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 551 buf, ipsec_get_policylen(buf)) < 0) { 552 err(1, "ipsec policy cannot be configured"); 553 } 554 free(buf); 555 } 556 if (policy_out != NULL) { 557 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 558 if (buf == NULL) 559 errx(1, "%s", ipsec_strerror()); 560 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 561 buf, ipsec_get_policylen(buf)) < 0) { 562 err(1, "ipsec policy cannot be configured"); 563 } 564 free(buf); 565 } 566 } 567 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 568 if (buf == NULL) 569 errx(1, "%s", ipsec_strerror()); 570 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 571 buf, ipsec_get_policylen(buf)) < 0) { 572 #if 0 573 warnx("ipsec is not configured"); 574 #else 575 /* ignore it, should be okay */ 576 #endif 577 } 578 free(buf); 579 } 580 #else 581 { 582 int optval; 583 if (pingflags & F_AUTHHDR) { 584 optval = IPSEC_LEVEL_REQUIRE; 585 #ifdef IP_AUTH_TRANS_LEVEL 586 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 587 (char *)&optval, sizeof(optval)); 588 #else 589 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 590 (char *)&optval, sizeof(optval)); 591 #endif 592 } 593 if (pingflags & F_ENCRYPT) { 594 optval = IPSEC_LEVEL_REQUIRE; 595 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 596 (char *)&optval, sizeof(optval)); 597 } 598 optval = IPSEC_LEVEL_BYPASS; 599 #ifdef IP_AUTH_TRANS_LEVEL 600 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 601 (char *)&optval, sizeof(optval)); 602 #else 603 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 604 (char *)&optval, sizeof(optval)); 605 #endif 606 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 607 (char *)&optval, sizeof(optval)); 608 } 609 #endif /*IPSEC_POLICY_IPSEC*/ 610 #endif /*IPSEC*/ 611 612 (void)printf("PING %s (%s): %d data bytes\n", hostname, 613 inet_ntoa(whereto.sin_addr), datalen); 614 615 /* When pinging the broadcast address, you can get a lot 616 * of answers. Doing something so evil is useful if you 617 * are trying to stress the ethernet, or just want to 618 * fill the arp cache to get some stuff for /etc/ethers. 619 */ 620 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 621 (char*)&bufspace, sizeof(bufspace))) { 622 if ((bufspace -= 4096) <= 0) 623 err(1, "Cannot set the receive buffer size"); 624 } 625 626 /* make it possible to send giant probes, but do not worry now 627 * if it fails, since we probably won't send giant probes. 628 */ 629 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 630 (char*)&bufspace, sizeof(bufspace)); 631 632 (void)signal(SIGINT, prefinish); 633 634 #ifdef SIGINFO 635 sa.sa_handler = prtsig; 636 sa.sa_flags = SA_NOKERNINFO; 637 sigemptyset(&sa.sa_mask); 638 (void)sigaction(SIGINFO, &sa, NULL); 639 #else 640 (void)signal(SIGQUIT, prtsig); 641 #endif 642 (void)signal(SIGCONT, prtsig); 643 644 /* fire off them quickies */ 645 for (i = 0; i < preload; i++) { 646 (void)gettimeofday(&now, 0); 647 pinger(); 648 } 649 650 doit(); 651 return 0; 652 } 653 654 655 static void 656 doit(void) 657 { 658 int cc; 659 struct sockaddr_in from; 660 socklen_t fromlen; 661 double sec, last, d_last; 662 struct pollfd fdmaskp[1]; 663 664 (void)gettimeofday(&clear_cache,0); 665 if (maxwait != 0) { 666 last = timeval_to_sec(&clear_cache) + maxwait; 667 d_last = 0; 668 } else { 669 last = 0; 670 d_last = 365*24*60*60; 671 } 672 673 do { 674 (void)gettimeofday(&now,0); 675 676 if (last != 0) 677 d_last = last - timeval_to_sec(&now); 678 679 if (ntransmitted < npackets && d_last > 0) { 680 /* send if within 100 usec or late for next packet */ 681 sec = diffsec(&next_tx,&now); 682 if (sec <= 0.0001 || 683 (lastrcvd && (pingflags & F_FLOOD))) { 684 pinger(); 685 sec = diffsec(&next_tx,&now); 686 } 687 if (sec < 0.0) 688 sec = 0.0; 689 if (d_last < sec) 690 sec = d_last; 691 692 } else { 693 /* For the last response, wait twice as long as the 694 * worst case seen, or 10 times as long as the 695 * maximum interpacket interval, whichever is longer. 696 */ 697 sec = MAX(2 * tmax, 10 * interval) - 698 diffsec(&now, &last_tx); 699 if (d_last < sec) 700 sec = d_last; 701 if (sec <= 0) 702 break; 703 } 704 705 706 fdmaskp[0].fd = s; 707 fdmaskp[0].events = POLLIN; 708 cc = poll(fdmaskp, 1, (int)(sec * 1000)); 709 if (cc <= 0) { 710 if (cc < 0) { 711 if (errno == EINTR) 712 continue; 713 jiggle_flush(1); 714 err(1, "poll"); 715 } 716 continue; 717 } 718 719 fromlen = sizeof(from); 720 cc = recvfrom(s, (char *) packet, packlen, 721 0, (struct sockaddr *)&from, 722 &fromlen); 723 if (cc < 0) { 724 if (errno != EINTR) { 725 jiggle_flush(1); 726 warn("recvfrom"); 727 (void)fflush(stderr); 728 } 729 continue; 730 } 731 (void)gettimeofday(&now, 0); 732 pr_pack(packet, cc, &from); 733 734 } while (nreceived < npackets 735 && (nreceived == 0 || !(pingflags & F_ONCE))); 736 737 finish(0); 738 } 739 740 741 static void 742 jiggle_flush(int nl) /* new line if there are dots */ 743 { 744 int serrno = errno; 745 746 if (jiggle_cnt > 0) { 747 total_jiggled += jiggle_cnt; 748 jiggle_direction = 1; 749 do { 750 (void)putchar('.'); 751 } while (--jiggle_cnt > 0); 752 753 } else if (jiggle_cnt < 0) { 754 total_jiggled -= jiggle_cnt; 755 jiggle_direction = -1; 756 do { 757 (void)putchar('\b'); 758 } while (++jiggle_cnt < 0); 759 } 760 761 if (nl) { 762 if (total_jiggled != 0) 763 (void)putchar('\n'); 764 total_jiggled = 0; 765 jiggle_direction = -1; 766 } 767 768 (void)fflush(stdout); 769 (void)fflush(stderr); 770 jiggle_time = now; 771 errno = serrno; 772 } 773 774 775 /* jiggle the cursor for flood-ping 776 */ 777 static void 778 jiggle(int delta) 779 { 780 double dt; 781 782 if (pingflags & F_QUIET) 783 return; 784 785 /* do not back up into messages */ 786 if (total_jiggled+jiggle_cnt+delta < 0) 787 return; 788 789 jiggle_cnt += delta; 790 791 /* flush the FLOOD dots when things are quiet 792 * or occassionally to make the cursor jiggle. 793 */ 794 dt = diffsec(&last_tx, &jiggle_time); 795 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 796 jiggle_flush(0); 797 } 798 799 800 /* 801 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 802 * will be added on by the kernel. The ID field is our UNIX process ID, 803 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 804 * of the data portion are used to hold a UNIX "timeval" struct in VAX 805 * byte-order, to compute the round-trip time. 806 */ 807 static void 808 pinger(void) 809 { 810 struct tv32 tv32; 811 int i, cc, sw; 812 813 opack_icmp.icmp_code = 0; 814 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 815 816 /* clear the cached route in the kernel after an ICMP 817 * response such as a Redirect is seen to stop causing 818 * more such packets. Also clear the cached route 819 * periodically in case of routing changes that make 820 * black holes come and go. 821 */ 822 if (clear_cache.tv_sec != now.tv_sec) { 823 opack_icmp.icmp_type = ICMP_ECHOREPLY; 824 opack_icmp.icmp_id = ~ident; 825 opack_icmp.icmp_cksum = 0; 826 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 827 PHDR_LEN); 828 sw = 0; 829 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 830 (char *)&sw,sizeof(sw)) < 0) 831 err(1, "Can't turn off special IP header"); 832 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 833 (struct sockaddr *)&loc_addr, 834 sizeof(struct sockaddr_in)) < 0) { 835 /* 836 * XXX: we only report this as a warning in verbose 837 * mode because people get confused when they see 838 * this error when they are running in single user 839 * mode and they have not configured lo0 840 */ 841 if (pingflags & F_VERBOSE) 842 warn("failed to clear cached route"); 843 } 844 sw = 1; 845 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 846 (char *)&sw, sizeof(sw)) < 0) 847 err(1, "Can't set special IP header"); 848 849 (void)gettimeofday(&clear_cache,0); 850 } 851 852 opack_icmp.icmp_type = ICMP_ECHO; 853 opack_icmp.icmp_id = ident; 854 tv32.tv32_sec = htonl(now.tv_sec); 855 tv32.tv32_usec = htonl(now.tv_usec); 856 if (pingflags & F_TIMING) 857 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 858 cc = datalen + PHDR_LEN; 859 opack_icmp.icmp_cksum = 0; 860 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 861 862 cc += opack_ip->ip_hl<<2; 863 opack_ip->ip_len = cc; 864 i = sendto(s, (char *) opack_ip, cc, 0, 865 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 866 if (i != cc) { 867 jiggle_flush(1); 868 if (i < 0) 869 warn("sendto"); 870 else 871 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 872 (void)fflush(stderr); 873 } 874 lastrcvd = 0; 875 876 CLR(ntransmitted); 877 ntransmitted++; 878 879 last_tx = now; 880 if (next_tx.tv_sec == 0) { 881 first_tx = now; 882 next_tx = now; 883 } 884 885 /* Transmit regularly, at always the same microsecond in the 886 * second when going at one packet per second. 887 * If we are at most 100 ms behind, send extras to get caught up. 888 * Otherwise, skip packets we were too slow to send. 889 */ 890 if (diffsec(&next_tx, &now) <= interval) { 891 do { 892 timevaladd(&next_tx, &interval_tv); 893 } while (diffsec(&next_tx, &now) < -0.1); 894 } 895 896 if (pingflags & F_FLOOD) 897 jiggle(1); 898 899 /* While the packet is going out, ready buffer for the next 900 * packet. Use a fast but not very good random number generator. 901 */ 902 if (pingflags & F_PING_RANDOM) 903 rnd_fill(); 904 } 905 906 907 static void 908 pr_pack_sub(int cc, 909 char *addr, 910 int seqno, 911 int dupflag, 912 int ttl, 913 double triptime) 914 { 915 jiggle_flush(1); 916 917 if (pingflags & F_FLOOD) 918 return; 919 920 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 921 if (dupflag) 922 (void)printf(" DUP!"); 923 (void)printf(" ttl=%d", ttl); 924 if (pingflags & F_TIMING) 925 (void)printf(" time=%.3f ms", triptime*1000.0); 926 927 /* 928 * Send beep to stderr, since that's more likely than stdout 929 * to go to a terminal.. 930 */ 931 if (pingflags & F_AUDIBLE && !dupflag) 932 (void)fprintf(stderr,"\a"); 933 } 934 935 936 /* 937 * Print out the packet, if it came from us. This logic is necessary 938 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 939 * which arrive ('tis only fair). This permits multiple copies of this 940 * program to be run without having intermingled output (or statistics!). 941 */ 942 static void 943 pr_pack(u_char *buf, 944 int tot_len, 945 struct sockaddr_in *from) 946 { 947 struct ip *ip; 948 struct icmp *icp; 949 int i, j, net_len; 950 u_char *cp; 951 static int old_rrlen; 952 static char old_rr[MAX_IPOPTLEN]; 953 int hlen, dupflag = 0, dumped; 954 double triptime = 0.0; 955 #define PR_PACK_SUB() {if (!dumped) { \ 956 dumped = 1; \ 957 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 958 ntohs((u_int16_t)icp->icmp_seq), \ 959 dupflag, ip->ip_ttl, triptime);}} 960 961 /* Check the IP header */ 962 ip = (struct ip *) buf; 963 hlen = ip->ip_hl << 2; 964 if (tot_len < hlen + ICMP_MINLEN) { 965 if (pingflags & F_VERBOSE) { 966 jiggle_flush(1); 967 (void)printf("packet too short (%d bytes) from %s\n", 968 tot_len, inet_ntoa(from->sin_addr)); 969 } 970 return; 971 } 972 973 /* Now the ICMP part */ 974 dumped = 0; 975 net_len = tot_len - hlen; 976 icp = (struct icmp *)(buf + hlen); 977 if (icp->icmp_type == ICMP_ECHOREPLY 978 && icp->icmp_id == ident) { 979 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 980 lastrcvd = 1; 981 last_rx = now; 982 if (first_rx.tv_sec == 0) 983 first_rx = last_rx; 984 nreceived++; 985 if (pingflags & F_TIMING) { 986 struct timeval tv; 987 struct tv32 tv32; 988 989 (void) memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 990 tv.tv_sec = ntohl(tv32.tv32_sec); 991 tv.tv_usec = ntohl(tv32.tv32_usec); 992 triptime = diffsec(&last_rx, &tv); 993 tsum += triptime; 994 tsumsq += triptime * triptime; 995 if (triptime < tmin) 996 tmin = triptime; 997 if (triptime > tmax) 998 tmax = triptime; 999 } 1000 1001 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1002 nrepeats++, nreceived--; 1003 dupflag=1; 1004 } else { 1005 SET(ntohs((u_int16_t)icp->icmp_seq)); 1006 } 1007 1008 if (tot_len != opack_ip->ip_len) { 1009 PR_PACK_SUB(); 1010 switch (opack_ip->ip_len - tot_len) { 1011 case MAX_IPOPTLEN: 1012 if ((pongflags & F_RECORD_ROUTE) != 0) 1013 break; 1014 if ((pingflags & F_RECORD_ROUTE) == 0) 1015 goto out; 1016 pongflags |= F_RECORD_ROUTE; 1017 (void)printf("\nremote host does not " 1018 "support record route"); 1019 break; 1020 case 8: 1021 if ((pongflags & F_SOURCE_ROUTE) != 0) 1022 break; 1023 if ((pingflags & F_SOURCE_ROUTE) == 0) 1024 goto out; 1025 pongflags |= F_SOURCE_ROUTE; 1026 (void)printf("\nremote host does not " 1027 "support source route"); 1028 break; 1029 default: 1030 out: 1031 (void)printf("\nwrong total length %d " 1032 "instead of %d", tot_len, opack_ip->ip_len); 1033 break; 1034 } 1035 } 1036 1037 if (!dupflag) { 1038 static u_int16_t last_seqno = 0xffff; 1039 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1040 u_int16_t gap = seqno - (last_seqno + 1); 1041 if (gap > 0 && gap < 0x8000 && 1042 (pingflags & F_VERBOSE)) { 1043 (void)printf("[*** sequence gap of %u " 1044 "packets from %u ... %u ***]\n", gap, 1045 (u_int16_t) (last_seqno + 1), 1046 (u_int16_t) (seqno - 1)); 1047 if (pingflags & F_QUIET) 1048 summary(0); 1049 } 1050 1051 if (gap < 0x8000) 1052 last_seqno = seqno; 1053 } 1054 1055 if (pingflags & F_QUIET) 1056 return; 1057 1058 if (!(pingflags & F_FLOOD)) 1059 PR_PACK_SUB(); 1060 1061 /* check the data */ 1062 if (datalen > (int)PHDR_LEN 1063 && !(pingflags & F_PING_RANDOM) 1064 && memcmp(&icp->icmp_data[PHDR_LEN], 1065 &opack_icmp.icmp_data[PHDR_LEN], 1066 datalen-PHDR_LEN)) { 1067 for (i=PHDR_LEN; i<datalen; i++) { 1068 if (icp->icmp_data[i] != 1069 opack_icmp.icmp_data[i]) 1070 break; 1071 } 1072 PR_PACK_SUB(); 1073 (void)printf("\nwrong data byte #%d should have been" 1074 " %#x but was %#x", i, 1075 (u_char)opack_icmp.icmp_data[i], 1076 (u_char)icp->icmp_data[i]); 1077 for (i=PHDR_LEN; i<datalen; i++) { 1078 if ((i%16) == PHDR_LEN) 1079 (void)printf("\n\t"); 1080 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1081 } 1082 } 1083 1084 } else { 1085 if (!pr_icmph(icp, from, net_len)) 1086 return; 1087 dumped = 2; 1088 } 1089 1090 /* Display any IP options */ 1091 cp = buf + sizeof(struct ip); 1092 while (hlen > (int)sizeof(struct ip)) { 1093 switch (*cp) { 1094 case IPOPT_EOL: 1095 hlen = 0; 1096 break; 1097 case IPOPT_LSRR: 1098 hlen -= 2; 1099 j = *++cp; 1100 ++cp; 1101 j -= IPOPT_MINOFF; 1102 if (j <= 0) 1103 continue; 1104 if (dumped <= 1) { 1105 j = ((j+3)/4)*4; 1106 hlen -= j; 1107 cp += j; 1108 break; 1109 } 1110 PR_PACK_SUB(); 1111 (void)printf("\nLSRR: "); 1112 for (;;) { 1113 pr_saddr(cp); 1114 cp += 4; 1115 hlen -= 4; 1116 j -= 4; 1117 if (j <= 0) 1118 break; 1119 (void)putchar('\n'); 1120 } 1121 break; 1122 case IPOPT_RR: 1123 j = *++cp; /* get length */ 1124 i = *++cp; /* and pointer */ 1125 hlen -= 2; 1126 if (i > j) 1127 i = j; 1128 i -= IPOPT_MINOFF; 1129 if (i <= 0) 1130 continue; 1131 if (dumped <= 1) { 1132 if (i == old_rrlen 1133 && !memcmp(cp, old_rr, i)) { 1134 if (dumped) 1135 (void)printf("\t(same route)"); 1136 j = ((i+3)/4)*4; 1137 hlen -= j; 1138 cp += j; 1139 break; 1140 } 1141 old_rrlen = i; 1142 (void) memcpy(old_rr, cp, i); 1143 } 1144 if (!dumped) { 1145 jiggle_flush(1); 1146 (void)printf("RR: "); 1147 dumped = 1; 1148 } else { 1149 (void)printf("\nRR: "); 1150 } 1151 for (;;) { 1152 pr_saddr(cp); 1153 cp += 4; 1154 hlen -= 4; 1155 i -= 4; 1156 if (i <= 0) 1157 break; 1158 (void)putchar('\n'); 1159 } 1160 break; 1161 case IPOPT_NOP: 1162 if (dumped <= 1) 1163 break; 1164 PR_PACK_SUB(); 1165 (void)printf("\nNOP"); 1166 break; 1167 #ifdef sgi 1168 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1169 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1170 case IPOPT_CIPSO: /* Commercial IPSO */ 1171 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1172 i = (unsigned)cp[1]; 1173 hlen -= i - 1; 1174 PR_PACK_SUB(); 1175 (void)printf("\nSEC:"); 1176 while (i--) { 1177 (void)printf(" %02x", *cp++); 1178 } 1179 cp--; 1180 break; 1181 } 1182 #endif 1183 default: 1184 PR_PACK_SUB(); 1185 (void)printf("\nunknown option 0x%x", *cp); 1186 break; 1187 } 1188 hlen--; 1189 cp++; 1190 } 1191 1192 if (dumped) { 1193 (void)putchar('\n'); 1194 (void)fflush(stdout); 1195 } else { 1196 jiggle(-1); 1197 } 1198 } 1199 1200 1201 /* Compute the IP checksum 1202 * This assumes the packet is less than 32K long. 1203 */ 1204 static u_int16_t 1205 in_cksum(u_int16_t *p, u_int len) 1206 { 1207 u_int32_t sum = 0; 1208 int nwords = len >> 1; 1209 1210 while (nwords-- != 0) 1211 sum += *p++; 1212 1213 if (len & 1) { 1214 union { 1215 u_int16_t w; 1216 u_int8_t c[2]; 1217 } u; 1218 u.c[0] = *(u_char *)p; 1219 u.c[1] = 0; 1220 sum += u.w; 1221 } 1222 1223 /* end-around-carry */ 1224 sum = (sum >> 16) + (sum & 0xffff); 1225 sum += (sum >> 16); 1226 return (~sum); 1227 } 1228 1229 1230 /* 1231 * compute the difference of two timevals in seconds 1232 */ 1233 static double 1234 diffsec(struct timeval *timenow, 1235 struct timeval *then) 1236 { 1237 return ((timenow->tv_sec - then->tv_sec)*1.0 1238 + (timenow->tv_usec - then->tv_usec)/1000000.0); 1239 } 1240 1241 1242 static void 1243 timevaladd(struct timeval *t1, 1244 struct timeval *t2) 1245 { 1246 1247 t1->tv_sec += t2->tv_sec; 1248 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1249 t1->tv_sec++; 1250 t1->tv_usec -= 1000000; 1251 } 1252 } 1253 1254 1255 static void 1256 sec_to_timeval(const double sec, struct timeval *tp) 1257 { 1258 tp->tv_sec = sec; 1259 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1260 } 1261 1262 1263 static double 1264 timeval_to_sec(const struct timeval *tp) 1265 { 1266 return tp->tv_sec + tp->tv_usec / 1000000.0; 1267 } 1268 1269 1270 /* 1271 * Print statistics. 1272 * Heavily buffered STDIO is used here, so that all the statistics 1273 * will be written with 1 sys-write call. This is nice when more 1274 * than one copy of the program is running on a terminal; it prevents 1275 * the statistics output from becomming intermingled. 1276 */ 1277 static void 1278 summary(int header) 1279 { 1280 jiggle_flush(1); 1281 1282 if (header) 1283 (void)printf("\n----%s PING Statistics----\n", hostname); 1284 (void)printf("%d packets transmitted, ", ntransmitted); 1285 (void)printf("%d packets received, ", nreceived); 1286 if (nrepeats) 1287 (void)printf("+%d duplicates, ", nrepeats); 1288 if (ntransmitted) { 1289 if (nreceived > ntransmitted) 1290 (void)printf("-- somebody's duplicating packets!"); 1291 else 1292 (void)printf("%.1f%% packet loss", 1293 (((ntransmitted-nreceived)*100.0) / 1294 ntransmitted)); 1295 } 1296 (void)printf("\n"); 1297 if (nreceived && (pingflags & F_TIMING)) { 1298 double n = nreceived + nrepeats; 1299 double avg = (tsum / n); 1300 double variance = 0.0; 1301 if (n>1) 1302 variance = (tsumsq - n*avg*avg) /(n-1); 1303 1304 printf("round-trip min/avg/max/stddev = " 1305 "%.3f/%.3f/%.3f/%.3f ms\n", 1306 tmin * 1000.0, avg * 1000.0, 1307 tmax * 1000.0, sqrt(variance) * 1000.0); 1308 if (pingflags & F_FLOOD) { 1309 double r = diffsec(&last_rx, &first_rx); 1310 double t = diffsec(&last_tx, &first_tx); 1311 if (r == 0) 1312 r = 0.0001; 1313 if (t == 0) 1314 t = 0.0001; 1315 (void)printf(" %.1f packets/sec sent, " 1316 " %.1f packets/sec received\n", 1317 ntransmitted/t, nreceived/r); 1318 } 1319 } 1320 } 1321 1322 1323 /* 1324 * Print statistics when SIGINFO is received. 1325 */ 1326 /* ARGSUSED */ 1327 static void 1328 prtsig(int dummy) 1329 { 1330 1331 summary(0); 1332 #ifndef SIGINFO 1333 (void)signal(SIGQUIT, prtsig); 1334 #endif 1335 } 1336 1337 1338 /* 1339 * On the first SIGINT, allow any outstanding packets to dribble in 1340 */ 1341 static void 1342 prefinish(int dummy) 1343 { 1344 if (lastrcvd /* quit now if caught up */ 1345 || nreceived == 0) /* or if remote is dead */ 1346 finish(0); 1347 1348 (void)signal(dummy, finish); /* do this only the 1st time */ 1349 1350 if (npackets > ntransmitted) /* let the normal limit work */ 1351 npackets = ntransmitted; 1352 } 1353 1354 /* 1355 * Print statistics and give up. 1356 */ 1357 /* ARGSUSED */ 1358 static void 1359 finish(int dummy) 1360 { 1361 #ifdef SIGINFO 1362 (void)signal(SIGINFO, SIG_DFL); 1363 #else 1364 (void)signal(SIGQUIT, SIG_DFL); 1365 #endif 1366 1367 summary(1); 1368 exit(nreceived > 0 ? 0 : 2); 1369 } 1370 1371 1372 static int /* 0=do not print it */ 1373 ck_pr_icmph(struct icmp *icp, 1374 struct sockaddr_in *from, 1375 int cc, 1376 int override) /* 1=override VERBOSE if interesting */ 1377 { 1378 int hlen; 1379 struct ip ipb, *ip = &ipb; 1380 struct icmp icp2b, *icp2 = &icp2b; 1381 int res; 1382 1383 if (pingflags & F_VERBOSE) { 1384 res = 1; 1385 jiggle_flush(1); 1386 } else { 1387 res = 0; 1388 } 1389 1390 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1391 hlen = ip->ip_hl << 2; 1392 if (ip->ip_p == IPPROTO_ICMP 1393 && hlen + 6 <= cc) { 1394 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1395 if (icp2->icmp_id == ident) { 1396 /* remember to clear route cached in kernel 1397 * if this non-Echo-Reply ICMP message was for one 1398 * of our packets. 1399 */ 1400 clear_cache.tv_sec = 0; 1401 1402 if (!res && override 1403 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1404 jiggle_flush(1); 1405 (void)printf("%d bytes from %s: ", 1406 cc, pr_addr(&from->sin_addr)); 1407 res = 1; 1408 } 1409 } 1410 } 1411 1412 return res; 1413 } 1414 1415 1416 /* 1417 * Print a descriptive string about an ICMP header other than an echo reply. 1418 */ 1419 static int /* 0=printed nothing */ 1420 pr_icmph(struct icmp *icp, 1421 struct sockaddr_in *from, 1422 int cc) 1423 { 1424 switch (icp->icmp_type ) { 1425 case ICMP_UNREACH: 1426 if (!ck_pr_icmph(icp, from, cc, 1)) 1427 return 0; 1428 switch (icp->icmp_code) { 1429 case ICMP_UNREACH_NET: 1430 (void)printf("Destination Net Unreachable"); 1431 break; 1432 case ICMP_UNREACH_HOST: 1433 (void)printf("Destination Host Unreachable"); 1434 break; 1435 case ICMP_UNREACH_PROTOCOL: 1436 (void)printf("Destination Protocol Unreachable"); 1437 break; 1438 case ICMP_UNREACH_PORT: 1439 (void)printf("Destination Port Unreachable"); 1440 break; 1441 case ICMP_UNREACH_NEEDFRAG: 1442 (void)printf("frag needed and DF set. Next MTU=%d", 1443 ntohs(icp->icmp_nextmtu)); 1444 break; 1445 case ICMP_UNREACH_SRCFAIL: 1446 (void)printf("Source Route Failed"); 1447 break; 1448 case ICMP_UNREACH_NET_UNKNOWN: 1449 (void)printf("Unreachable unknown net"); 1450 break; 1451 case ICMP_UNREACH_HOST_UNKNOWN: 1452 (void)printf("Unreachable unknown host"); 1453 break; 1454 case ICMP_UNREACH_ISOLATED: 1455 (void)printf("Unreachable host isolated"); 1456 break; 1457 case ICMP_UNREACH_NET_PROHIB: 1458 (void)printf("Net prohibited access"); 1459 break; 1460 case ICMP_UNREACH_HOST_PROHIB: 1461 (void)printf("Host prohibited access"); 1462 break; 1463 case ICMP_UNREACH_TOSNET: 1464 (void)printf("Bad TOS for net"); 1465 break; 1466 case ICMP_UNREACH_TOSHOST: 1467 (void)printf("Bad TOS for host"); 1468 break; 1469 case 13: 1470 (void)printf("Communication prohibited"); 1471 break; 1472 case 14: 1473 (void)printf("Host precedence violation"); 1474 break; 1475 case 15: 1476 (void)printf("Precedence cutoff"); 1477 break; 1478 default: 1479 (void)printf("Bad Destination Unreachable Code: %d", 1480 icp->icmp_code); 1481 break; 1482 } 1483 /* Print returned IP header information */ 1484 pr_retip(icp, cc); 1485 break; 1486 1487 case ICMP_SOURCEQUENCH: 1488 if (!ck_pr_icmph(icp, from, cc, 1)) 1489 return 0; 1490 (void)printf("Source Quench"); 1491 pr_retip(icp, cc); 1492 break; 1493 1494 case ICMP_REDIRECT: 1495 if (!ck_pr_icmph(icp, from, cc, 1)) 1496 return 0; 1497 switch (icp->icmp_code) { 1498 case ICMP_REDIRECT_NET: 1499 (void)printf("Redirect Network"); 1500 break; 1501 case ICMP_REDIRECT_HOST: 1502 (void)printf("Redirect Host"); 1503 break; 1504 case ICMP_REDIRECT_TOSNET: 1505 (void)printf("Redirect Type of Service and Network"); 1506 break; 1507 case ICMP_REDIRECT_TOSHOST: 1508 (void)printf("Redirect Type of Service and Host"); 1509 break; 1510 default: 1511 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1512 break; 1513 } 1514 (void)printf(" New router addr: %s", 1515 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1516 pr_retip(icp, cc); 1517 break; 1518 1519 case ICMP_ECHO: 1520 if (!ck_pr_icmph(icp, from, cc, 0)) 1521 return 0; 1522 (void)printf("Echo Request: ID=%d seq=%d", 1523 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1524 break; 1525 1526 case ICMP_ECHOREPLY: 1527 /* displaying other's pings is too noisey */ 1528 #if 0 1529 if (!ck_pr_icmph(icp, from, cc, 0)) 1530 return 0; 1531 (void)printf("Echo Reply: ID=%d seq=%d", 1532 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1533 break; 1534 #else 1535 return 0; 1536 #endif 1537 1538 case ICMP_ROUTERADVERT: 1539 if (!ck_pr_icmph(icp, from, cc, 0)) 1540 return 0; 1541 (void)printf("Router Discovery Advert"); 1542 break; 1543 1544 case ICMP_ROUTERSOLICIT: 1545 if (!ck_pr_icmph(icp, from, cc, 0)) 1546 return 0; 1547 (void)printf("Router Discovery Solicit"); 1548 break; 1549 1550 case ICMP_TIMXCEED: 1551 if (!ck_pr_icmph(icp, from, cc, 1)) 1552 return 0; 1553 switch (icp->icmp_code ) { 1554 case ICMP_TIMXCEED_INTRANS: 1555 (void)printf("Time To Live exceeded"); 1556 break; 1557 case ICMP_TIMXCEED_REASS: 1558 (void)printf("Frag reassembly time exceeded"); 1559 break; 1560 default: 1561 (void)printf("Time exceeded, Bad Code: %d", 1562 icp->icmp_code); 1563 break; 1564 } 1565 pr_retip(icp, cc); 1566 break; 1567 1568 case ICMP_PARAMPROB: 1569 if (!ck_pr_icmph(icp, from, cc, 1)) 1570 return 0; 1571 (void)printf("Parameter problem: pointer = 0x%02x", 1572 icp->icmp_hun.ih_pptr); 1573 pr_retip(icp, cc); 1574 break; 1575 1576 case ICMP_TSTAMP: 1577 if (!ck_pr_icmph(icp, from, cc, 0)) 1578 return 0; 1579 (void)printf("Timestamp"); 1580 break; 1581 1582 case ICMP_TSTAMPREPLY: 1583 if (!ck_pr_icmph(icp, from, cc, 0)) 1584 return 0; 1585 (void)printf("Timestamp Reply"); 1586 break; 1587 1588 case ICMP_IREQ: 1589 if (!ck_pr_icmph(icp, from, cc, 0)) 1590 return 0; 1591 (void)printf("Information Request"); 1592 break; 1593 1594 case ICMP_IREQREPLY: 1595 if (!ck_pr_icmph(icp, from, cc, 0)) 1596 return 0; 1597 (void)printf("Information Reply"); 1598 break; 1599 1600 case ICMP_MASKREQ: 1601 if (!ck_pr_icmph(icp, from, cc, 0)) 1602 return 0; 1603 (void)printf("Address Mask Request"); 1604 break; 1605 1606 case ICMP_MASKREPLY: 1607 if (!ck_pr_icmph(icp, from, cc, 0)) 1608 return 0; 1609 (void)printf("Address Mask Reply"); 1610 break; 1611 1612 default: 1613 if (!ck_pr_icmph(icp, from, cc, 0)) 1614 return 0; 1615 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1616 if (pingflags & F_VERBOSE) 1617 pr_iph(icp, cc); 1618 } 1619 1620 return 1; 1621 } 1622 1623 1624 /* 1625 * Print an IP header with options. 1626 */ 1627 static void 1628 pr_iph(struct icmp *icp, 1629 int cc) 1630 { 1631 int hlen; 1632 u_char *cp; 1633 struct ip ipb, *ip = &ipb; 1634 1635 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1636 1637 hlen = ip->ip_hl << 2; 1638 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1639 1640 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1641 (void)printf(" %1x %1x %02x %04x %04x", 1642 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1643 (void)printf(" %1x %04x", 1644 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1645 (void)printf(" %02x %02x %04x", 1646 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1647 (void)printf(" %15s ", 1648 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1649 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1650 /* dump any option bytes */ 1651 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1652 (void)printf("%02x", *cp++); 1653 } 1654 } 1655 1656 /* 1657 * Print an ASCII host address starting from a string of bytes. 1658 */ 1659 static void 1660 pr_saddr(u_char *cp) 1661 { 1662 n_long l; 1663 struct in_addr addr; 1664 1665 l = (u_char)*++cp; 1666 l = (l<<8) + (u_char)*++cp; 1667 l = (l<<8) + (u_char)*++cp; 1668 l = (l<<8) + (u_char)*++cp; 1669 addr.s_addr = htonl(l); 1670 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1671 } 1672 1673 1674 /* 1675 * Return an ASCII host address 1676 * as a dotted quad and optionally with a hostname 1677 */ 1678 static char * 1679 pr_addr(struct in_addr *addr) /* in network order */ 1680 { 1681 struct hostent *hp; 1682 static char buf[MAXHOSTNAMELEN+4+16+1]; 1683 1684 if ((pingflags & F_NUMERIC) 1685 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1686 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1687 } else { 1688 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1689 inet_ntoa(*addr)); 1690 } 1691 1692 return buf; 1693 } 1694 1695 /* 1696 * Dump some info on a returned (via ICMP) IP packet. 1697 */ 1698 static void 1699 pr_retip(struct icmp *icp, 1700 int cc) 1701 { 1702 int hlen; 1703 u_char *cp; 1704 struct ip ipb, *ip = &ipb; 1705 1706 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1707 1708 if (pingflags & F_VERBOSE) 1709 pr_iph(icp, cc); 1710 1711 hlen = ip->ip_hl << 2; 1712 cp = (u_char *) &icp->icmp_data[hlen]; 1713 1714 if (ip->ip_p == IPPROTO_TCP) { 1715 if (pingflags & F_VERBOSE) 1716 (void)printf("\n TCP: from port %u, to port %u", 1717 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1718 } else if (ip->ip_p == IPPROTO_UDP) { 1719 if (pingflags & F_VERBOSE) 1720 (void)printf("\n UDP: from port %u, to port %u", 1721 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1722 } else if (ip->ip_p == IPPROTO_ICMP) { 1723 struct icmp icp2; 1724 (void) memcpy(&icp2, cp, sizeof(icp2)); 1725 if (icp2.icmp_type == ICMP_ECHO) { 1726 if (pingflags & F_VERBOSE) 1727 (void)printf("\n ID=%u icmp_seq=%u", 1728 ntohs((u_int16_t)icp2.icmp_id), 1729 ntohs((u_int16_t)icp2.icmp_seq)); 1730 else 1731 (void)printf(" for icmp_seq=%u", 1732 ntohs((u_int16_t)icp2.icmp_seq)); 1733 } 1734 } 1735 } 1736 1737 static void 1738 fill(void) 1739 { 1740 int i, j, k; 1741 char *cp; 1742 int pat[16]; 1743 1744 for (cp = fill_pat; *cp != '\0'; cp++) { 1745 if (!isxdigit((unsigned char)*cp)) 1746 break; 1747 } 1748 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1749 (void)fflush(stdout); 1750 errx(1, "\"-p %s\": patterns must be specified with" 1751 " 1-32 hex digits\n", 1752 fill_pat); 1753 } 1754 1755 i = sscanf(fill_pat, 1756 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1757 &pat[0], &pat[1], &pat[2], &pat[3], 1758 &pat[4], &pat[5], &pat[6], &pat[7], 1759 &pat[8], &pat[9], &pat[10], &pat[11], 1760 &pat[12], &pat[13], &pat[14], &pat[15]); 1761 1762 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1763 opack_icmp.icmp_data[k] = pat[j]; 1764 if (++j >= i) 1765 j = 0; 1766 } 1767 1768 if (!(pingflags & F_QUIET)) { 1769 (void)printf("PATTERN: 0x"); 1770 for (j=0; j<i; j++) 1771 (void)printf("%02x", 1772 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1773 (void)printf("\n"); 1774 } 1775 1776 } 1777 1778 1779 static void 1780 rnd_fill(void) 1781 { 1782 static u_int32_t rnd; 1783 int i; 1784 1785 for (i = PHDR_LEN; i < datalen; i++) { 1786 rnd = (3141592621U * rnd + 663896637U); 1787 opack_icmp.icmp_data[i] = rnd>>24; 1788 } 1789 } 1790 1791 1792 static void 1793 gethost(const char *arg, 1794 const char *name, 1795 struct sockaddr_in *sa, 1796 char *realname, 1797 int realname_len) 1798 { 1799 struct hostent *hp; 1800 1801 (void)memset(sa, 0, sizeof(*sa)); 1802 sa->sin_family = AF_INET; 1803 sa->sin_len = sizeof(struct sockaddr_in); 1804 1805 /* If it is an IP address, try to convert it to a name to 1806 * have something nice to display. 1807 */ 1808 if (inet_aton(name, &sa->sin_addr) != 0) { 1809 if (realname) { 1810 if (pingflags & F_NUMERIC) 1811 hp = 0; 1812 else 1813 hp = gethostbyaddr((char *)&sa->sin_addr, 1814 sizeof(sa->sin_addr), 1815 AF_INET); 1816 (void)strlcpy(realname, hp ? hp->h_name : name, 1817 realname_len); 1818 } 1819 return; 1820 } 1821 1822 hp = gethostbyname(name); 1823 if (!hp) 1824 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1825 1826 if (hp->h_addrtype != AF_INET) 1827 errx(1, "%s only supported with IP", arg); 1828 1829 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1830 1831 if (realname) 1832 (void)strlcpy(realname, hp->h_name, realname_len); 1833 } 1834 1835 1836 static void 1837 usage(void) 1838 { 1839 #ifdef IPSEC 1840 #ifdef IPSEC_POLICY_IPSEC 1841 #define IPSECOPT "\n [-E policy] " 1842 #else 1843 #define IPSECOPT "\n [-AE] " 1844 #endif /*IPSEC_POLICY_IPSEC*/ 1845 #else 1846 #define IPSECOPT "" 1847 #endif /*IPSEC*/ 1848 1849 (void)fprintf(stderr, "usage: \n" 1850 "%s [-adDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1851 " [-i interval] [-I addr]\n" 1852 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1853 " [-w maxwait] " IPSECOPT "host\n", 1854 getprogname()); 1855 exit(1); 1856 } 1857