ping.c revision 1.89
1 /* $NetBSD: ping.c,v 1.89 2009/04/11 06:49:50 lukem 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 1.89 2009/04/11 06:49:50 lukem 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 #ifdef sgi 82 #include <bstring.h> 83 #include <getopt.h> 84 #include <sys/prctl.h> 85 #ifndef PRE_KUDZU 86 #include <cap_net.h> 87 #else 88 #define cap_socket socket 89 #endif 90 #else 91 #define cap_socket socket 92 #endif 93 94 #include <netinet/in_systm.h> 95 #include <netinet/in.h> 96 #include <netinet/ip.h> 97 #include <netinet/ip_icmp.h> 98 #include <netinet/ip_var.h> 99 #include <arpa/inet.h> 100 #include <ctype.h> 101 #include <netdb.h> 102 103 #ifdef IPSEC 104 #include <netinet6/ipsec.h> 105 #endif /*IPSEC*/ 106 107 #define FLOOD_INTVL 0.01 /* default flood output interval */ 108 #define MAXPACKET (IP_MAXPACKET-60-8) /* max packet size */ 109 110 #define F_VERBOSE 0x0001 111 #define F_QUIET 0x0002 /* minimize all output */ 112 #define F_SEMI_QUIET 0x0004 /* ignore our ICMP errors */ 113 #define F_FLOOD 0x0008 /* flood-ping */ 114 #define F_RECORD_ROUTE 0x0010 /* record route */ 115 #define F_SOURCE_ROUTE 0x0020 /* loose source route */ 116 #define F_PING_FILLED 0x0040 /* is buffer filled with user data? */ 117 #define F_PING_RANDOM 0x0080 /* use random data */ 118 #define F_NUMERIC 0x0100 /* do not do gethostbyaddr() calls */ 119 #define F_TIMING 0x0200 /* room for a timestamp */ 120 #define F_DF 0x0400 /* set IP DF bit */ 121 #define F_SOURCE_ADDR 0x0800 /* set source IP address/interface */ 122 #define F_ONCE 0x1000 /* exit(0) after receiving 1 reply */ 123 #define F_MCAST 0x2000 /* multicast target */ 124 #define F_MCAST_NOLOOP 0x4000 /* no multicast loopback */ 125 #define F_AUDIBLE 0x8000 /* audible output */ 126 #ifdef IPSEC 127 #ifdef IPSEC_POLICY_IPSEC 128 #define F_POLICY 0x10000 129 #else 130 #define F_AUTHHDR 0x10000 131 #define F_ENCRYPT 0x20000 132 #endif /*IPSEC_POLICY_IPSEC*/ 133 #endif /*IPSEC*/ 134 135 136 /* MAX_DUP_CHK is the number of bits in received table, the 137 * maximum number of received sequence numbers we can track to check 138 * for duplicates. 139 */ 140 #define MAX_DUP_CHK (8 * 2048) 141 u_char rcvd_tbl[MAX_DUP_CHK/8]; 142 int nrepeats = 0; 143 #define A(seq) rcvd_tbl[(seq/8)%sizeof(rcvd_tbl)] /* byte in array */ 144 #define B(seq) (1 << (seq & 0x07)) /* bit in byte */ 145 #define SET(seq) (A(seq) |= B(seq)) 146 #define CLR(seq) (A(seq) &= (~B(seq))) 147 #define TST(seq) (A(seq) & B(seq)) 148 149 struct tv32 { 150 int32_t tv32_sec; 151 int32_t tv32_usec; 152 }; 153 154 155 u_char *packet; 156 int packlen; 157 int pingflags = 0, options; 158 int pongflags = 0; 159 char *fill_pat; 160 161 int s; /* Socket file descriptor */ 162 int sloop; /* Socket file descriptor/loopback */ 163 164 #define PHDR_LEN sizeof(struct tv32) /* size of timestamp header */ 165 struct sockaddr_in whereto, send_addr; /* Who to ping */ 166 struct sockaddr_in src_addr; /* from where */ 167 struct sockaddr_in loc_addr; /* 127.1 */ 168 int datalen = 64 - PHDR_LEN; /* How much data */ 169 170 #ifndef __NetBSD__ 171 static char *progname; 172 #define getprogname() (progname) 173 #define setprogname(name) ((void)(progname = (name))) 174 #endif 175 176 char hostname[MAXHOSTNAMELEN]; 177 178 static struct { 179 struct ip o_ip; 180 char o_opt[MAX_IPOPTLEN]; 181 union { 182 u_char u_buf[MAXPACKET+offsetof(struct icmp, icmp_data)]; 183 struct icmp u_icmp; 184 } o_u; 185 } out_pack; 186 #define opack_icmp out_pack.o_u.u_icmp 187 struct ip *opack_ip; 188 189 char optspace[MAX_IPOPTLEN]; /* record route space */ 190 int optlen; 191 192 193 int npackets; /* total packets to send */ 194 int preload; /* number of packets to "preload" */ 195 int ntransmitted; /* output sequence # = #sent */ 196 int ident; /* our ID, in network byte order */ 197 198 int nreceived; /* # of packets we got back */ 199 200 double interval; /* interval between packets */ 201 struct timeval interval_tv; 202 double tmin = 999999999.0; 203 double tmax = 0.0; 204 double tsum = 0.0; /* sum of all times */ 205 double tsumsq = 0.0; 206 double maxwait = 0.0; 207 208 int bufspace = IP_MAXPACKET; 209 210 struct timeval now, clear_cache, last_tx, next_tx, first_tx; 211 struct timeval last_rx, first_rx; 212 int lastrcvd = 1; /* last ping sent has been received */ 213 214 static struct timeval jiggle_time; 215 static int jiggle_cnt, total_jiggled, jiggle_direction = -1; 216 217 static void doit(void); 218 static void prefinish(int); 219 static void prtsig(int); 220 static void finish(int); 221 static void summary(int); 222 static void pinger(void); 223 static void fill(void); 224 static void rnd_fill(void); 225 static double diffsec(struct timeval *, struct timeval *); 226 static void timevaladd(struct timeval *, struct timeval *); 227 static void sec_to_timeval(const double, struct timeval *); 228 static double timeval_to_sec(const struct timeval *); 229 static void pr_pack(u_char *, int, struct sockaddr_in *); 230 static u_int16_t in_cksum(u_int16_t *, u_int); 231 static void pr_saddr(u_char *); 232 static char *pr_addr(struct in_addr *); 233 static void pr_iph(struct icmp *, int); 234 static void pr_retip(struct icmp *, int); 235 static int pr_icmph(struct icmp *, struct sockaddr_in *, int); 236 static void jiggle(int), jiggle_flush(int); 237 static void gethost(const char *, const char *, 238 struct sockaddr_in *, char *, int); 239 static void usage(void); 240 241 int 242 main(int argc, char *argv[]) 243 { 244 int c, i, on = 1, hostind = 0; 245 long l; 246 u_char ttl = 0; 247 u_long tos = 0; 248 char *p; 249 #ifdef IPSEC 250 #ifdef IPSEC_POLICY_IPSEC 251 char *policy_in = NULL; 252 char *policy_out = NULL; 253 #endif 254 #endif 255 #ifdef SIGINFO 256 struct sigaction sa; 257 #endif 258 259 if ((s = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 260 err(1, "Cannot create socket"); 261 if ((sloop = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 262 err(1, "Cannot create socket"); 263 264 /* 265 * sloop is never read on. This prevents packets from 266 * queueing in its recv buffer. 267 */ 268 if (shutdown(sloop, SHUT_RD) == -1) 269 warn("Cannot shutdown for read"); 270 271 if (setuid(getuid()) == -1) 272 err(1, "setuid"); 273 274 setprogname(argv[0]); 275 276 #ifndef IPSEC 277 #define IPSECOPT 278 #else 279 #ifdef IPSEC_POLICY_IPSEC 280 #define IPSECOPT "E:" 281 #else 282 #define IPSECOPT "AE" 283 #endif /*IPSEC_POLICY_IPSEC*/ 284 #endif 285 while ((c = getopt(argc, argv, 286 "ac:dDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 287 #undef IPSECOPT 288 switch (c) { 289 case 'a': 290 pingflags |= F_AUDIBLE; 291 break; 292 case 'c': 293 npackets = strtol(optarg, &p, 0); 294 if (*p != '\0' || npackets <= 0) 295 errx(1, "Bad/invalid number of packets"); 296 break; 297 case 'D': 298 pingflags |= F_DF; 299 break; 300 case 'd': 301 options |= SO_DEBUG; 302 break; 303 case 'f': 304 pingflags |= F_FLOOD; 305 break; 306 case 'h': 307 hostind = optind-1; 308 break; 309 case 'i': /* wait between sending packets */ 310 interval = strtod(optarg, &p); 311 if (*p != '\0' || interval <= 0) 312 errx(1, "Bad/invalid interval %s", optarg); 313 break; 314 case 'l': 315 preload = strtol(optarg, &p, 0); 316 if (*p != '\0' || preload < 0) 317 errx(1, "Bad/invalid preload value %s", 318 optarg); 319 break; 320 case 'n': 321 pingflags |= F_NUMERIC; 322 break; 323 case 'o': 324 pingflags |= F_ONCE; 325 break; 326 case 'p': /* fill buffer with user pattern */ 327 if (pingflags & F_PING_RANDOM) 328 errx(1, "Only one of -P and -p allowed"); 329 pingflags |= F_PING_FILLED; 330 fill_pat = optarg; 331 break; 332 case 'P': 333 if (pingflags & F_PING_FILLED) 334 errx(1, "Only one of -P and -p allowed"); 335 pingflags |= F_PING_RANDOM; 336 break; 337 case 'q': 338 pingflags |= F_QUIET; 339 break; 340 case 'Q': 341 pingflags |= F_SEMI_QUIET; 342 break; 343 case 'r': 344 options |= SO_DONTROUTE; 345 break; 346 case 's': /* size of packet to send */ 347 l = strtol(optarg, &p, 0); 348 if (*p != '\0' || l < 0) 349 errx(1, "Bad/invalid packet size %s", optarg); 350 if (l > MAXPACKET) 351 errx(1, "packet size is too large"); 352 datalen = (int)l; 353 break; 354 case 'v': 355 pingflags |= F_VERBOSE; 356 break; 357 case 'R': 358 pingflags |= F_RECORD_ROUTE; 359 break; 360 case 'L': 361 pingflags |= F_MCAST_NOLOOP; 362 break; 363 case 't': 364 tos = strtoul(optarg, &p, 0); 365 if (*p != '\0' || tos > 0xFF) 366 errx(1, "bad tos value: %s", optarg); 367 break; 368 case 'T': 369 l = strtol(optarg, &p, 0); 370 if (*p != '\0' || l > 255 || l <= 0) 371 errx(1, "ttl out of range"); 372 ttl = (u_char)l; /* cannot check >255 otherwise */ 373 break; 374 case 'I': 375 pingflags |= F_SOURCE_ADDR; 376 gethost("-I", optarg, &src_addr, 0, 0); 377 break; 378 case 'g': 379 pingflags |= F_SOURCE_ROUTE; 380 gethost("-g", optarg, &send_addr, 0, 0); 381 break; 382 case 'w': 383 maxwait = strtod(optarg, &p); 384 if (*p != '\0' || maxwait <= 0) 385 errx(1, "Bad/invalid maxwait time %s", optarg); 386 break; 387 #ifdef IPSEC 388 #ifdef IPSEC_POLICY_IPSEC 389 case 'E': 390 pingflags |= F_POLICY; 391 if (!strncmp("in", optarg, 2)) { 392 policy_in = strdup(optarg); 393 if (!policy_in) 394 err(1, "strdup"); 395 } else if (!strncmp("out", optarg, 3)) { 396 policy_out = strdup(optarg); 397 if (!policy_out) 398 err(1, "strdup"); 399 } else 400 errx(1, "invalid security policy"); 401 break; 402 #else 403 case 'A': 404 pingflags |= F_AUTHHDR; 405 break; 406 case 'E': 407 pingflags |= F_ENCRYPT; 408 break; 409 #endif /*IPSEC_POLICY_IPSEC*/ 410 #endif /*IPSEC*/ 411 default: 412 usage(); 413 break; 414 } 415 } 416 417 if (interval == 0) 418 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 419 #ifndef sgi 420 if (pingflags & F_FLOOD && getuid()) 421 errx(1, "Must be superuser to use -f"); 422 if (interval < 1.0 && getuid()) 423 errx(1, "Must be superuser to use < 1 sec ping interval"); 424 if (preload > 0 && getuid()) 425 errx(1, "Must be superuser to use -l"); 426 #endif 427 sec_to_timeval(interval, &interval_tv); 428 429 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 430 warnx("Sorry, no audible output for flood pings"); 431 432 if (npackets != 0) { 433 npackets += preload; 434 } else { 435 npackets = INT_MAX; 436 } 437 438 if (hostind == 0) { 439 if (optind != argc-1) 440 usage(); 441 else 442 hostind = optind; 443 } 444 else if (hostind >= argc - 1) 445 usage(); 446 447 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 448 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 449 pingflags |= F_MCAST; 450 if (!(pingflags & F_SOURCE_ROUTE)) 451 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 452 453 loc_addr.sin_family = AF_INET; 454 loc_addr.sin_len = sizeof(struct sockaddr_in); 455 loc_addr.sin_addr.s_addr = htonl((127<<24)+1); 456 457 if (datalen >= (int)PHDR_LEN) /* can we time them? */ 458 pingflags |= F_TIMING; 459 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 460 if ((packet = (u_char *)malloc(packlen)) == NULL) 461 err(1, "Out of memory"); 462 463 if (pingflags & F_PING_FILLED) { 464 fill(); 465 } else if (pingflags & F_PING_RANDOM) { 466 rnd_fill(); 467 } else { 468 for (i = PHDR_LEN; i < datalen; i++) 469 opack_icmp.icmp_data[i] = i; 470 } 471 472 ident = arc4random() & 0xFFFF; 473 474 if (options & SO_DEBUG) { 475 if (setsockopt(s, SOL_SOCKET, SO_DEBUG, 476 (char *)&on, sizeof(on)) == -1) 477 warn("Can't turn on socket debugging"); 478 } 479 if (options & SO_DONTROUTE) { 480 if (setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 481 (char *)&on, sizeof(on)) == -1) 482 warn("SO_DONTROUTE"); 483 } 484 485 if (options & SO_DEBUG) { 486 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 487 (char *)&on, sizeof(on)) == -1) 488 warn("Can't turn on socket debugging"); 489 } 490 if (options & SO_DONTROUTE) { 491 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 492 (char *)&on, sizeof(on)) == -1) 493 warn("SO_DONTROUTE"); 494 } 495 496 if (pingflags & F_SOURCE_ROUTE) { 497 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 498 optspace[IPOPT_OLEN] = optlen = 7; 499 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 500 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 501 sizeof(whereto.sin_addr)); 502 optspace[optlen++] = IPOPT_NOP; 503 } 504 if (pingflags & F_RECORD_ROUTE) { 505 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 506 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 507 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 508 optlen = MAX_IPOPTLEN; 509 } 510 /* this leaves opack_ip 0(mod 4) aligned */ 511 opack_ip = (struct ip *)((char *)&out_pack.o_ip 512 + sizeof(out_pack.o_opt) 513 - optlen); 514 (void) memcpy(opack_ip + 1, optspace, optlen); 515 516 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 517 err(1, "Can't set special IP header"); 518 519 opack_ip->ip_v = IPVERSION; 520 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 521 opack_ip->ip_tos = tos; 522 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 523 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 524 opack_ip->ip_p = IPPROTO_ICMP; 525 opack_ip->ip_src = src_addr.sin_addr; 526 opack_ip->ip_dst = send_addr.sin_addr; 527 528 if (pingflags & F_MCAST) { 529 if (pingflags & F_MCAST_NOLOOP) { 530 u_char loop = 0; 531 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 532 (char *) &loop, 1) < 0) 533 err(1, "Can't disable multicast loopback"); 534 } 535 536 if (ttl != 0 537 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 538 (char *) &ttl, 1) < 0) 539 err(1, "Can't set multicast time-to-live"); 540 541 if ((pingflags & F_SOURCE_ADDR) 542 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 543 (char *) &src_addr.sin_addr, 544 sizeof(src_addr.sin_addr)) < 0) 545 err(1, "Can't set multicast source interface"); 546 547 } else if (pingflags & F_SOURCE_ADDR) { 548 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 549 (char *) &src_addr.sin_addr, 550 sizeof(src_addr.sin_addr)) < 0) 551 err(1, "Can't set source interface/address"); 552 } 553 #ifdef IPSEC 554 #ifdef IPSEC_POLICY_IPSEC 555 { 556 char *buf; 557 if (pingflags & F_POLICY) { 558 if (policy_in != NULL) { 559 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 560 if (buf == NULL) 561 errx(1, "%s", ipsec_strerror()); 562 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 563 buf, ipsec_get_policylen(buf)) < 0) { 564 err(1, "ipsec policy cannot be configured"); 565 } 566 free(buf); 567 } 568 if (policy_out != NULL) { 569 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 570 if (buf == NULL) 571 errx(1, "%s", ipsec_strerror()); 572 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 573 buf, ipsec_get_policylen(buf)) < 0) { 574 err(1, "ipsec policy cannot be configured"); 575 } 576 free(buf); 577 } 578 } 579 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 580 if (buf == NULL) 581 errx(1, "%s", ipsec_strerror()); 582 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 583 buf, ipsec_get_policylen(buf)) < 0) { 584 #if 0 585 warnx("ipsec is not configured"); 586 #else 587 /* ignore it, should be okay */ 588 #endif 589 } 590 free(buf); 591 } 592 #else 593 { 594 int optval; 595 if (pingflags & F_AUTHHDR) { 596 optval = IPSEC_LEVEL_REQUIRE; 597 #ifdef IP_AUTH_TRANS_LEVEL 598 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 599 (char *)&optval, sizeof(optval)); 600 #else 601 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 602 (char *)&optval, sizeof(optval)); 603 #endif 604 } 605 if (pingflags & F_ENCRYPT) { 606 optval = IPSEC_LEVEL_REQUIRE; 607 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 608 (char *)&optval, sizeof(optval)); 609 } 610 optval = IPSEC_LEVEL_BYPASS; 611 #ifdef IP_AUTH_TRANS_LEVEL 612 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 613 (char *)&optval, sizeof(optval)); 614 #else 615 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 616 (char *)&optval, sizeof(optval)); 617 #endif 618 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 619 (char *)&optval, sizeof(optval)); 620 } 621 #endif /*IPSEC_POLICY_IPSEC*/ 622 #endif /*IPSEC*/ 623 624 (void)printf("PING %s (%s): %d data bytes\n", hostname, 625 inet_ntoa(whereto.sin_addr), datalen); 626 627 /* When pinging the broadcast address, you can get a lot 628 * of answers. Doing something so evil is useful if you 629 * are trying to stress the ethernet, or just want to 630 * fill the arp cache to get some stuff for /etc/ethers. 631 */ 632 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 633 (char*)&bufspace, sizeof(bufspace))) { 634 if ((bufspace -= 4096) <= 0) 635 err(1, "Cannot set the receive buffer size"); 636 } 637 638 /* make it possible to send giant probes, but do not worry now 639 * if it fails, since we probably won't send giant probes. 640 */ 641 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 642 (char*)&bufspace, sizeof(bufspace)); 643 644 (void)signal(SIGINT, prefinish); 645 646 #ifdef SIGINFO 647 sa.sa_handler = prtsig; 648 sa.sa_flags = SA_NOKERNINFO; 649 sigemptyset(&sa.sa_mask); 650 (void)sigaction(SIGINFO, &sa, NULL); 651 #else 652 (void)signal(SIGQUIT, prtsig); 653 #endif 654 (void)signal(SIGCONT, prtsig); 655 656 /* fire off them quickies */ 657 for (i = 0; i < preload; i++) { 658 (void)gettimeofday(&now, 0); 659 pinger(); 660 } 661 662 doit(); 663 return 0; 664 } 665 666 667 static void 668 doit(void) 669 { 670 int cc; 671 struct sockaddr_in from; 672 socklen_t fromlen; 673 double sec, last, d_last; 674 struct pollfd fdmaskp[1]; 675 676 (void)gettimeofday(&clear_cache,0); 677 if (maxwait != 0) { 678 last = timeval_to_sec(&clear_cache) + maxwait; 679 d_last = 0; 680 } else { 681 last = 0; 682 d_last = 365*24*60*60; 683 } 684 685 do { 686 (void)gettimeofday(&now,0); 687 688 if (last != 0) 689 d_last = last - timeval_to_sec(&now); 690 691 if (ntransmitted < npackets && d_last > 0) { 692 /* send if within 100 usec or late for next packet */ 693 sec = diffsec(&next_tx,&now); 694 if (sec <= 0.0001 || 695 (lastrcvd && (pingflags & F_FLOOD))) { 696 pinger(); 697 sec = diffsec(&next_tx,&now); 698 } 699 if (sec < 0.0) 700 sec = 0.0; 701 if (d_last < sec) 702 sec = d_last; 703 704 } else { 705 /* For the last response, wait twice as long as the 706 * worst case seen, or 10 times as long as the 707 * maximum interpacket interval, whichever is longer. 708 */ 709 sec = MAX(2 * tmax, 10 * interval) - 710 diffsec(&now, &last_tx); 711 if (d_last < sec) 712 sec = d_last; 713 if (sec <= 0) 714 break; 715 } 716 717 718 fdmaskp[0].fd = s; 719 fdmaskp[0].events = POLLIN; 720 cc = poll(fdmaskp, 1, (int)(sec * 1000)); 721 if (cc <= 0) { 722 if (cc < 0) { 723 if (errno == EINTR) 724 continue; 725 jiggle_flush(1); 726 err(1, "poll"); 727 } 728 continue; 729 } 730 731 fromlen = sizeof(from); 732 cc = recvfrom(s, (char *) packet, packlen, 733 0, (struct sockaddr *)&from, 734 &fromlen); 735 if (cc < 0) { 736 if (errno != EINTR) { 737 jiggle_flush(1); 738 warn("recvfrom"); 739 (void)fflush(stderr); 740 } 741 continue; 742 } 743 (void)gettimeofday(&now, 0); 744 pr_pack(packet, cc, &from); 745 746 } while (nreceived < npackets 747 && (nreceived == 0 || !(pingflags & F_ONCE))); 748 749 finish(0); 750 } 751 752 753 static void 754 jiggle_flush(int nl) /* new line if there are dots */ 755 { 756 int serrno = errno; 757 758 if (jiggle_cnt > 0) { 759 total_jiggled += jiggle_cnt; 760 jiggle_direction = 1; 761 do { 762 (void)putchar('.'); 763 } while (--jiggle_cnt > 0); 764 765 } else if (jiggle_cnt < 0) { 766 total_jiggled -= jiggle_cnt; 767 jiggle_direction = -1; 768 do { 769 (void)putchar('\b'); 770 } while (++jiggle_cnt < 0); 771 } 772 773 if (nl) { 774 if (total_jiggled != 0) 775 (void)putchar('\n'); 776 total_jiggled = 0; 777 jiggle_direction = -1; 778 } 779 780 (void)fflush(stdout); 781 (void)fflush(stderr); 782 jiggle_time = now; 783 errno = serrno; 784 } 785 786 787 /* jiggle the cursor for flood-ping 788 */ 789 static void 790 jiggle(int delta) 791 { 792 double dt; 793 794 if (pingflags & F_QUIET) 795 return; 796 797 /* do not back up into messages */ 798 if (total_jiggled+jiggle_cnt+delta < 0) 799 return; 800 801 jiggle_cnt += delta; 802 803 /* flush the FLOOD dots when things are quiet 804 * or occassionally to make the cursor jiggle. 805 */ 806 dt = diffsec(&last_tx, &jiggle_time); 807 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 808 jiggle_flush(0); 809 } 810 811 812 /* 813 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 814 * will be added on by the kernel. The ID field is our UNIX process ID, 815 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 816 * of the data portion are used to hold a UNIX "timeval" struct in VAX 817 * byte-order, to compute the round-trip time. 818 */ 819 static void 820 pinger(void) 821 { 822 struct tv32 tv32; 823 int i, cc, sw; 824 825 opack_icmp.icmp_code = 0; 826 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 827 828 /* clear the cached route in the kernel after an ICMP 829 * response such as a Redirect is seen to stop causing 830 * more such packets. Also clear the cached route 831 * periodically in case of routing changes that make 832 * black holes come and go. 833 */ 834 if (clear_cache.tv_sec != now.tv_sec) { 835 opack_icmp.icmp_type = ICMP_ECHOREPLY; 836 opack_icmp.icmp_id = ~ident; 837 opack_icmp.icmp_cksum = 0; 838 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 839 PHDR_LEN); 840 sw = 0; 841 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 842 (char *)&sw,sizeof(sw)) < 0) 843 err(1, "Can't turn off special IP header"); 844 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 845 (struct sockaddr *)&loc_addr, 846 sizeof(struct sockaddr_in)) < 0) { 847 /* 848 * XXX: we only report this as a warning in verbose 849 * mode because people get confused when they see 850 * this error when they are running in single user 851 * mode and they have not configured lo0 852 */ 853 if (pingflags & F_VERBOSE) 854 warn("failed to clear cached route"); 855 } 856 sw = 1; 857 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 858 (char *)&sw, sizeof(sw)) < 0) 859 err(1, "Can't set special IP header"); 860 861 (void)gettimeofday(&clear_cache,0); 862 } 863 864 opack_icmp.icmp_type = ICMP_ECHO; 865 opack_icmp.icmp_id = ident; 866 tv32.tv32_sec = htonl(now.tv_sec); 867 tv32.tv32_usec = htonl(now.tv_usec); 868 if (pingflags & F_TIMING) 869 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 870 cc = datalen + PHDR_LEN; 871 opack_icmp.icmp_cksum = 0; 872 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 873 874 cc += opack_ip->ip_hl<<2; 875 opack_ip->ip_len = cc; 876 i = sendto(s, (char *) opack_ip, cc, 0, 877 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 878 if (i != cc) { 879 jiggle_flush(1); 880 if (i < 0) 881 warn("sendto"); 882 else 883 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 884 (void)fflush(stderr); 885 } 886 lastrcvd = 0; 887 888 CLR(ntransmitted); 889 ntransmitted++; 890 891 last_tx = now; 892 if (next_tx.tv_sec == 0) { 893 first_tx = now; 894 next_tx = now; 895 } 896 897 /* Transmit regularly, at always the same microsecond in the 898 * second when going at one packet per second. 899 * If we are at most 100 ms behind, send extras to get caught up. 900 * Otherwise, skip packets we were too slow to send. 901 */ 902 if (diffsec(&next_tx, &now) <= interval) { 903 do { 904 timevaladd(&next_tx, &interval_tv); 905 } while (diffsec(&next_tx, &now) < -0.1); 906 } 907 908 if (pingflags & F_FLOOD) 909 jiggle(1); 910 911 /* While the packet is going out, ready buffer for the next 912 * packet. Use a fast but not very good random number generator. 913 */ 914 if (pingflags & F_PING_RANDOM) 915 rnd_fill(); 916 } 917 918 919 static void 920 pr_pack_sub(int cc, 921 char *addr, 922 int seqno, 923 int dupflag, 924 int ttl, 925 double triptime) 926 { 927 jiggle_flush(1); 928 929 if (pingflags & F_FLOOD) 930 return; 931 932 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 933 if (dupflag) 934 (void)printf(" DUP!"); 935 (void)printf(" ttl=%d", ttl); 936 if (pingflags & F_TIMING) 937 (void)printf(" time=%.3f ms", triptime*1000.0); 938 939 /* 940 * Send beep to stderr, since that's more likely than stdout 941 * to go to a terminal.. 942 */ 943 if (pingflags & F_AUDIBLE && !dupflag) 944 (void)fprintf(stderr,"\a"); 945 } 946 947 948 /* 949 * Print out the packet, if it came from us. This logic is necessary 950 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 951 * which arrive ('tis only fair). This permits multiple copies of this 952 * program to be run without having intermingled output (or statistics!). 953 */ 954 static void 955 pr_pack(u_char *buf, 956 int tot_len, 957 struct sockaddr_in *from) 958 { 959 struct ip *ip; 960 struct icmp *icp; 961 int i, j, net_len; 962 u_char *cp; 963 static int old_rrlen; 964 static char old_rr[MAX_IPOPTLEN]; 965 int hlen, dupflag = 0, dumped; 966 double triptime = 0.0; 967 #define PR_PACK_SUB() {if (!dumped) { \ 968 dumped = 1; \ 969 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 970 ntohs((u_int16_t)icp->icmp_seq), \ 971 dupflag, ip->ip_ttl, triptime);}} 972 973 /* Check the IP header */ 974 ip = (struct ip *) buf; 975 hlen = ip->ip_hl << 2; 976 if (tot_len < hlen + ICMP_MINLEN) { 977 if (pingflags & F_VERBOSE) { 978 jiggle_flush(1); 979 (void)printf("packet too short (%d bytes) from %s\n", 980 tot_len, inet_ntoa(from->sin_addr)); 981 } 982 return; 983 } 984 985 /* Now the ICMP part */ 986 dumped = 0; 987 net_len = tot_len - hlen; 988 icp = (struct icmp *)(buf + hlen); 989 if (icp->icmp_type == ICMP_ECHOREPLY 990 && icp->icmp_id == ident) { 991 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 992 lastrcvd = 1; 993 last_rx = now; 994 if (first_rx.tv_sec == 0) 995 first_rx = last_rx; 996 nreceived++; 997 if (pingflags & F_TIMING) { 998 struct timeval tv; 999 struct tv32 tv32; 1000 1001 (void) memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 1002 tv.tv_sec = ntohl(tv32.tv32_sec); 1003 tv.tv_usec = ntohl(tv32.tv32_usec); 1004 triptime = diffsec(&last_rx, &tv); 1005 tsum += triptime; 1006 tsumsq += triptime * triptime; 1007 if (triptime < tmin) 1008 tmin = triptime; 1009 if (triptime > tmax) 1010 tmax = triptime; 1011 } 1012 1013 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1014 nrepeats++, nreceived--; 1015 dupflag=1; 1016 } else { 1017 SET(ntohs((u_int16_t)icp->icmp_seq)); 1018 } 1019 1020 if (tot_len != opack_ip->ip_len) { 1021 PR_PACK_SUB(); 1022 switch (opack_ip->ip_len - tot_len) { 1023 case MAX_IPOPTLEN: 1024 if ((pongflags & F_RECORD_ROUTE) != 0) 1025 break; 1026 if ((pingflags & F_RECORD_ROUTE) == 0) 1027 goto out; 1028 pongflags |= F_RECORD_ROUTE; 1029 (void)printf("\nremote host does not " 1030 "support record route"); 1031 break; 1032 case 8: 1033 if ((pongflags & F_SOURCE_ROUTE) != 0) 1034 break; 1035 if ((pingflags & F_SOURCE_ROUTE) == 0) 1036 goto out; 1037 pongflags |= F_SOURCE_ROUTE; 1038 (void)printf("\nremote host does not " 1039 "support source route"); 1040 break; 1041 default: 1042 out: 1043 (void)printf("\nwrong total length %d " 1044 "instead of %d", tot_len, opack_ip->ip_len); 1045 break; 1046 } 1047 } 1048 1049 if (!dupflag) { 1050 static u_int16_t last_seqno = 0xffff; 1051 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1052 u_int16_t gap = seqno - (last_seqno + 1); 1053 if (gap > 0 && gap < 0x8000 && 1054 (pingflags & F_VERBOSE)) { 1055 (void)printf("[*** sequence gap of %u " 1056 "packets from %u ... %u ***]\n", gap, 1057 (u_int16_t) (last_seqno + 1), 1058 (u_int16_t) (seqno - 1)); 1059 if (pingflags & F_QUIET) 1060 summary(0); 1061 } 1062 1063 if (gap < 0x8000) 1064 last_seqno = seqno; 1065 } 1066 1067 if (pingflags & F_QUIET) 1068 return; 1069 1070 if (!(pingflags & F_FLOOD)) 1071 PR_PACK_SUB(); 1072 1073 /* check the data */ 1074 if (datalen > (int)PHDR_LEN 1075 && !(pingflags & F_PING_RANDOM) 1076 && memcmp(&icp->icmp_data[PHDR_LEN], 1077 &opack_icmp.icmp_data[PHDR_LEN], 1078 datalen-PHDR_LEN)) { 1079 for (i=PHDR_LEN; i<datalen; i++) { 1080 if (icp->icmp_data[i] != 1081 opack_icmp.icmp_data[i]) 1082 break; 1083 } 1084 PR_PACK_SUB(); 1085 (void)printf("\nwrong data byte #%d should have been" 1086 " %#x but was %#x", i, 1087 (u_char)opack_icmp.icmp_data[i], 1088 (u_char)icp->icmp_data[i]); 1089 for (i=PHDR_LEN; i<datalen; i++) { 1090 if ((i%16) == PHDR_LEN) 1091 (void)printf("\n\t"); 1092 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1093 } 1094 } 1095 1096 } else { 1097 if (!pr_icmph(icp, from, net_len)) 1098 return; 1099 dumped = 2; 1100 } 1101 1102 /* Display any IP options */ 1103 cp = buf + sizeof(struct ip); 1104 while (hlen > (int)sizeof(struct ip)) { 1105 switch (*cp) { 1106 case IPOPT_EOL: 1107 hlen = 0; 1108 break; 1109 case IPOPT_LSRR: 1110 hlen -= 2; 1111 j = *++cp; 1112 ++cp; 1113 j -= IPOPT_MINOFF; 1114 if (j <= 0) 1115 continue; 1116 if (dumped <= 1) { 1117 j = ((j+3)/4)*4; 1118 hlen -= j; 1119 cp += j; 1120 break; 1121 } 1122 PR_PACK_SUB(); 1123 (void)printf("\nLSRR: "); 1124 for (;;) { 1125 pr_saddr(cp); 1126 cp += 4; 1127 hlen -= 4; 1128 j -= 4; 1129 if (j <= 0) 1130 break; 1131 (void)putchar('\n'); 1132 } 1133 break; 1134 case IPOPT_RR: 1135 j = *++cp; /* get length */ 1136 i = *++cp; /* and pointer */ 1137 hlen -= 2; 1138 if (i > j) 1139 i = j; 1140 i -= IPOPT_MINOFF; 1141 if (i <= 0) 1142 continue; 1143 if (dumped <= 1) { 1144 if (i == old_rrlen 1145 && !memcmp(cp, old_rr, i)) { 1146 if (dumped) 1147 (void)printf("\t(same route)"); 1148 j = ((i+3)/4)*4; 1149 hlen -= j; 1150 cp += j; 1151 break; 1152 } 1153 old_rrlen = i; 1154 (void) memcpy(old_rr, cp, i); 1155 } 1156 if (!dumped) { 1157 jiggle_flush(1); 1158 (void)printf("RR: "); 1159 dumped = 1; 1160 } else { 1161 (void)printf("\nRR: "); 1162 } 1163 for (;;) { 1164 pr_saddr(cp); 1165 cp += 4; 1166 hlen -= 4; 1167 i -= 4; 1168 if (i <= 0) 1169 break; 1170 (void)putchar('\n'); 1171 } 1172 break; 1173 case IPOPT_NOP: 1174 if (dumped <= 1) 1175 break; 1176 PR_PACK_SUB(); 1177 (void)printf("\nNOP"); 1178 break; 1179 #ifdef sgi 1180 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1181 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1182 case IPOPT_CIPSO: /* Commercial IPSO */ 1183 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1184 i = (unsigned)cp[1]; 1185 hlen -= i - 1; 1186 PR_PACK_SUB(); 1187 (void)printf("\nSEC:"); 1188 while (i--) { 1189 (void)printf(" %02x", *cp++); 1190 } 1191 cp--; 1192 break; 1193 } 1194 #endif 1195 default: 1196 PR_PACK_SUB(); 1197 (void)printf("\nunknown option 0x%x", *cp); 1198 break; 1199 } 1200 hlen--; 1201 cp++; 1202 } 1203 1204 if (dumped) { 1205 (void)putchar('\n'); 1206 (void)fflush(stdout); 1207 } else { 1208 jiggle(-1); 1209 } 1210 } 1211 1212 1213 /* Compute the IP checksum 1214 * This assumes the packet is less than 32K long. 1215 */ 1216 static u_int16_t 1217 in_cksum(u_int16_t *p, u_int len) 1218 { 1219 u_int32_t sum = 0; 1220 int nwords = len >> 1; 1221 1222 while (nwords-- != 0) 1223 sum += *p++; 1224 1225 if (len & 1) { 1226 union { 1227 u_int16_t w; 1228 u_int8_t c[2]; 1229 } u; 1230 u.c[0] = *(u_char *)p; 1231 u.c[1] = 0; 1232 sum += u.w; 1233 } 1234 1235 /* end-around-carry */ 1236 sum = (sum >> 16) + (sum & 0xffff); 1237 sum += (sum >> 16); 1238 return (~sum); 1239 } 1240 1241 1242 /* 1243 * compute the difference of two timevals in seconds 1244 */ 1245 static double 1246 diffsec(struct timeval *timenow, 1247 struct timeval *then) 1248 { 1249 return ((timenow->tv_sec - then->tv_sec)*1.0 1250 + (timenow->tv_usec - then->tv_usec)/1000000.0); 1251 } 1252 1253 1254 static void 1255 timevaladd(struct timeval *t1, 1256 struct timeval *t2) 1257 { 1258 1259 t1->tv_sec += t2->tv_sec; 1260 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1261 t1->tv_sec++; 1262 t1->tv_usec -= 1000000; 1263 } 1264 } 1265 1266 1267 static void 1268 sec_to_timeval(const double sec, struct timeval *tp) 1269 { 1270 tp->tv_sec = sec; 1271 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1272 } 1273 1274 1275 static double 1276 timeval_to_sec(const struct timeval *tp) 1277 { 1278 return tp->tv_sec + tp->tv_usec / 1000000.0; 1279 } 1280 1281 1282 /* 1283 * Print statistics. 1284 * Heavily buffered STDIO is used here, so that all the statistics 1285 * will be written with 1 sys-write call. This is nice when more 1286 * than one copy of the program is running on a terminal; it prevents 1287 * the statistics output from becomming intermingled. 1288 */ 1289 static void 1290 summary(int header) 1291 { 1292 jiggle_flush(1); 1293 1294 if (header) 1295 (void)printf("\n----%s PING Statistics----\n", hostname); 1296 (void)printf("%d packets transmitted, ", ntransmitted); 1297 (void)printf("%d packets received, ", nreceived); 1298 if (nrepeats) 1299 (void)printf("+%d duplicates, ", nrepeats); 1300 if (ntransmitted) { 1301 if (nreceived > ntransmitted) 1302 (void)printf("-- somebody's duplicating packets!"); 1303 else 1304 (void)printf("%.1f%% packet loss", 1305 (((ntransmitted-nreceived)*100.0) / 1306 ntransmitted)); 1307 } 1308 (void)printf("\n"); 1309 if (nreceived && (pingflags & F_TIMING)) { 1310 double n = nreceived + nrepeats; 1311 double avg = (tsum / n); 1312 double variance = 0.0; 1313 if (n>1) 1314 variance = (tsumsq - n*avg*avg) /(n-1); 1315 1316 printf("round-trip min/avg/max/stddev = " 1317 "%.3f/%.3f/%.3f/%.3f ms\n", 1318 tmin * 1000.0, avg * 1000.0, 1319 tmax * 1000.0, sqrt(variance) * 1000.0); 1320 if (pingflags & F_FLOOD) { 1321 double r = diffsec(&last_rx, &first_rx); 1322 double t = diffsec(&last_tx, &first_tx); 1323 if (r == 0) 1324 r = 0.0001; 1325 if (t == 0) 1326 t = 0.0001; 1327 (void)printf(" %.1f packets/sec sent, " 1328 " %.1f packets/sec received\n", 1329 ntransmitted/t, nreceived/r); 1330 } 1331 } 1332 } 1333 1334 1335 /* 1336 * Print statistics when SIGINFO is received. 1337 */ 1338 /* ARGSUSED */ 1339 static void 1340 prtsig(int dummy) 1341 { 1342 1343 summary(0); 1344 #ifndef SIGINFO 1345 (void)signal(SIGQUIT, prtsig); 1346 #endif 1347 } 1348 1349 1350 /* 1351 * On the first SIGINT, allow any outstanding packets to dribble in 1352 */ 1353 static void 1354 prefinish(int dummy) 1355 { 1356 if (lastrcvd /* quit now if caught up */ 1357 || nreceived == 0) /* or if remote is dead */ 1358 finish(0); 1359 1360 (void)signal(dummy, finish); /* do this only the 1st time */ 1361 1362 if (npackets > ntransmitted) /* let the normal limit work */ 1363 npackets = ntransmitted; 1364 } 1365 1366 /* 1367 * Print statistics and give up. 1368 */ 1369 /* ARGSUSED */ 1370 static void 1371 finish(int dummy) 1372 { 1373 #ifdef SIGINFO 1374 (void)signal(SIGINFO, SIG_DFL); 1375 #else 1376 (void)signal(SIGQUIT, SIG_DFL); 1377 #endif 1378 1379 summary(1); 1380 exit(nreceived > 0 ? 0 : 2); 1381 } 1382 1383 1384 static int /* 0=do not print it */ 1385 ck_pr_icmph(struct icmp *icp, 1386 struct sockaddr_in *from, 1387 int cc, 1388 int override) /* 1=override VERBOSE if interesting */ 1389 { 1390 int hlen; 1391 struct ip ipb, *ip = &ipb; 1392 struct icmp icp2b, *icp2 = &icp2b; 1393 int res; 1394 1395 if (pingflags & F_VERBOSE) { 1396 res = 1; 1397 jiggle_flush(1); 1398 } else { 1399 res = 0; 1400 } 1401 1402 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1403 hlen = ip->ip_hl << 2; 1404 if (ip->ip_p == IPPROTO_ICMP 1405 && hlen + 6 <= cc) { 1406 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1407 if (icp2->icmp_id == ident) { 1408 /* remember to clear route cached in kernel 1409 * if this non-Echo-Reply ICMP message was for one 1410 * of our packets. 1411 */ 1412 clear_cache.tv_sec = 0; 1413 1414 if (!res && override 1415 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1416 jiggle_flush(1); 1417 (void)printf("%d bytes from %s: ", 1418 cc, pr_addr(&from->sin_addr)); 1419 res = 1; 1420 } 1421 } 1422 } 1423 1424 return res; 1425 } 1426 1427 1428 /* 1429 * Print a descriptive string about an ICMP header other than an echo reply. 1430 */ 1431 static int /* 0=printed nothing */ 1432 pr_icmph(struct icmp *icp, 1433 struct sockaddr_in *from, 1434 int cc) 1435 { 1436 switch (icp->icmp_type ) { 1437 case ICMP_UNREACH: 1438 if (!ck_pr_icmph(icp, from, cc, 1)) 1439 return 0; 1440 switch (icp->icmp_code) { 1441 case ICMP_UNREACH_NET: 1442 (void)printf("Destination Net Unreachable"); 1443 break; 1444 case ICMP_UNREACH_HOST: 1445 (void)printf("Destination Host Unreachable"); 1446 break; 1447 case ICMP_UNREACH_PROTOCOL: 1448 (void)printf("Destination Protocol Unreachable"); 1449 break; 1450 case ICMP_UNREACH_PORT: 1451 (void)printf("Destination Port Unreachable"); 1452 break; 1453 case ICMP_UNREACH_NEEDFRAG: 1454 (void)printf("frag needed and DF set. Next MTU=%d", 1455 ntohs(icp->icmp_nextmtu)); 1456 break; 1457 case ICMP_UNREACH_SRCFAIL: 1458 (void)printf("Source Route Failed"); 1459 break; 1460 case ICMP_UNREACH_NET_UNKNOWN: 1461 (void)printf("Unreachable unknown net"); 1462 break; 1463 case ICMP_UNREACH_HOST_UNKNOWN: 1464 (void)printf("Unreachable unknown host"); 1465 break; 1466 case ICMP_UNREACH_ISOLATED: 1467 (void)printf("Unreachable host isolated"); 1468 break; 1469 case ICMP_UNREACH_NET_PROHIB: 1470 (void)printf("Net prohibited access"); 1471 break; 1472 case ICMP_UNREACH_HOST_PROHIB: 1473 (void)printf("Host prohibited access"); 1474 break; 1475 case ICMP_UNREACH_TOSNET: 1476 (void)printf("Bad TOS for net"); 1477 break; 1478 case ICMP_UNREACH_TOSHOST: 1479 (void)printf("Bad TOS for host"); 1480 break; 1481 case 13: 1482 (void)printf("Communication prohibited"); 1483 break; 1484 case 14: 1485 (void)printf("Host precedence violation"); 1486 break; 1487 case 15: 1488 (void)printf("Precedence cutoff"); 1489 break; 1490 default: 1491 (void)printf("Bad Destination Unreachable Code: %d", 1492 icp->icmp_code); 1493 break; 1494 } 1495 /* Print returned IP header information */ 1496 pr_retip(icp, cc); 1497 break; 1498 1499 case ICMP_SOURCEQUENCH: 1500 if (!ck_pr_icmph(icp, from, cc, 1)) 1501 return 0; 1502 (void)printf("Source Quench"); 1503 pr_retip(icp, cc); 1504 break; 1505 1506 case ICMP_REDIRECT: 1507 if (!ck_pr_icmph(icp, from, cc, 1)) 1508 return 0; 1509 switch (icp->icmp_code) { 1510 case ICMP_REDIRECT_NET: 1511 (void)printf("Redirect Network"); 1512 break; 1513 case ICMP_REDIRECT_HOST: 1514 (void)printf("Redirect Host"); 1515 break; 1516 case ICMP_REDIRECT_TOSNET: 1517 (void)printf("Redirect Type of Service and Network"); 1518 break; 1519 case ICMP_REDIRECT_TOSHOST: 1520 (void)printf("Redirect Type of Service and Host"); 1521 break; 1522 default: 1523 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1524 break; 1525 } 1526 (void)printf(" New router addr: %s", 1527 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1528 pr_retip(icp, cc); 1529 break; 1530 1531 case ICMP_ECHO: 1532 if (!ck_pr_icmph(icp, from, cc, 0)) 1533 return 0; 1534 (void)printf("Echo Request: ID=%d seq=%d", 1535 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1536 break; 1537 1538 case ICMP_ECHOREPLY: 1539 /* displaying other's pings is too noisey */ 1540 #if 0 1541 if (!ck_pr_icmph(icp, from, cc, 0)) 1542 return 0; 1543 (void)printf("Echo Reply: ID=%d seq=%d", 1544 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1545 break; 1546 #else 1547 return 0; 1548 #endif 1549 1550 case ICMP_ROUTERADVERT: 1551 if (!ck_pr_icmph(icp, from, cc, 0)) 1552 return 0; 1553 (void)printf("Router Discovery Advert"); 1554 break; 1555 1556 case ICMP_ROUTERSOLICIT: 1557 if (!ck_pr_icmph(icp, from, cc, 0)) 1558 return 0; 1559 (void)printf("Router Discovery Solicit"); 1560 break; 1561 1562 case ICMP_TIMXCEED: 1563 if (!ck_pr_icmph(icp, from, cc, 1)) 1564 return 0; 1565 switch (icp->icmp_code ) { 1566 case ICMP_TIMXCEED_INTRANS: 1567 (void)printf("Time To Live exceeded"); 1568 break; 1569 case ICMP_TIMXCEED_REASS: 1570 (void)printf("Frag reassembly time exceeded"); 1571 break; 1572 default: 1573 (void)printf("Time exceeded, Bad Code: %d", 1574 icp->icmp_code); 1575 break; 1576 } 1577 pr_retip(icp, cc); 1578 break; 1579 1580 case ICMP_PARAMPROB: 1581 if (!ck_pr_icmph(icp, from, cc, 1)) 1582 return 0; 1583 (void)printf("Parameter problem: pointer = 0x%02x", 1584 icp->icmp_hun.ih_pptr); 1585 pr_retip(icp, cc); 1586 break; 1587 1588 case ICMP_TSTAMP: 1589 if (!ck_pr_icmph(icp, from, cc, 0)) 1590 return 0; 1591 (void)printf("Timestamp"); 1592 break; 1593 1594 case ICMP_TSTAMPREPLY: 1595 if (!ck_pr_icmph(icp, from, cc, 0)) 1596 return 0; 1597 (void)printf("Timestamp Reply"); 1598 break; 1599 1600 case ICMP_IREQ: 1601 if (!ck_pr_icmph(icp, from, cc, 0)) 1602 return 0; 1603 (void)printf("Information Request"); 1604 break; 1605 1606 case ICMP_IREQREPLY: 1607 if (!ck_pr_icmph(icp, from, cc, 0)) 1608 return 0; 1609 (void)printf("Information Reply"); 1610 break; 1611 1612 case ICMP_MASKREQ: 1613 if (!ck_pr_icmph(icp, from, cc, 0)) 1614 return 0; 1615 (void)printf("Address Mask Request"); 1616 break; 1617 1618 case ICMP_MASKREPLY: 1619 if (!ck_pr_icmph(icp, from, cc, 0)) 1620 return 0; 1621 (void)printf("Address Mask Reply"); 1622 break; 1623 1624 default: 1625 if (!ck_pr_icmph(icp, from, cc, 0)) 1626 return 0; 1627 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1628 if (pingflags & F_VERBOSE) 1629 pr_iph(icp, cc); 1630 } 1631 1632 return 1; 1633 } 1634 1635 1636 /* 1637 * Print an IP header with options. 1638 */ 1639 static void 1640 pr_iph(struct icmp *icp, 1641 int cc) 1642 { 1643 int hlen; 1644 u_char *cp; 1645 struct ip ipb, *ip = &ipb; 1646 1647 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1648 1649 hlen = ip->ip_hl << 2; 1650 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1651 1652 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1653 (void)printf(" %1x %1x %02x %04x %04x", 1654 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1655 (void)printf(" %1x %04x", 1656 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1657 (void)printf(" %02x %02x %04x", 1658 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1659 (void)printf(" %15s ", 1660 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1661 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1662 /* dump any option bytes */ 1663 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1664 (void)printf("%02x", *cp++); 1665 } 1666 } 1667 1668 /* 1669 * Print an ASCII host address starting from a string of bytes. 1670 */ 1671 static void 1672 pr_saddr(u_char *cp) 1673 { 1674 n_long l; 1675 struct in_addr addr; 1676 1677 l = (u_char)*++cp; 1678 l = (l<<8) + (u_char)*++cp; 1679 l = (l<<8) + (u_char)*++cp; 1680 l = (l<<8) + (u_char)*++cp; 1681 addr.s_addr = htonl(l); 1682 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1683 } 1684 1685 1686 /* 1687 * Return an ASCII host address 1688 * as a dotted quad and optionally with a hostname 1689 */ 1690 static char * 1691 pr_addr(struct in_addr *addr) /* in network order */ 1692 { 1693 struct hostent *hp; 1694 static char buf[MAXHOSTNAMELEN+4+16+1]; 1695 1696 if ((pingflags & F_NUMERIC) 1697 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1698 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1699 } else { 1700 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1701 inet_ntoa(*addr)); 1702 } 1703 1704 return buf; 1705 } 1706 1707 /* 1708 * Dump some info on a returned (via ICMP) IP packet. 1709 */ 1710 static void 1711 pr_retip(struct icmp *icp, 1712 int cc) 1713 { 1714 int hlen; 1715 u_char *cp; 1716 struct ip ipb, *ip = &ipb; 1717 1718 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1719 1720 if (pingflags & F_VERBOSE) 1721 pr_iph(icp, cc); 1722 1723 hlen = ip->ip_hl << 2; 1724 cp = (u_char *) &icp->icmp_data[hlen]; 1725 1726 if (ip->ip_p == IPPROTO_TCP) { 1727 if (pingflags & F_VERBOSE) 1728 (void)printf("\n TCP: from port %u, to port %u", 1729 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1730 } else if (ip->ip_p == IPPROTO_UDP) { 1731 if (pingflags & F_VERBOSE) 1732 (void)printf("\n UDP: from port %u, to port %u", 1733 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1734 } else if (ip->ip_p == IPPROTO_ICMP) { 1735 struct icmp icp2; 1736 (void) memcpy(&icp2, cp, sizeof(icp2)); 1737 if (icp2.icmp_type == ICMP_ECHO) { 1738 if (pingflags & F_VERBOSE) 1739 (void)printf("\n ID=%u icmp_seq=%u", 1740 ntohs((u_int16_t)icp2.icmp_id), 1741 ntohs((u_int16_t)icp2.icmp_seq)); 1742 else 1743 (void)printf(" for icmp_seq=%u", 1744 ntohs((u_int16_t)icp2.icmp_seq)); 1745 } 1746 } 1747 } 1748 1749 static void 1750 fill(void) 1751 { 1752 int i, j, k; 1753 char *cp; 1754 int pat[16]; 1755 1756 for (cp = fill_pat; *cp != '\0'; cp++) { 1757 if (!isxdigit((unsigned char)*cp)) 1758 break; 1759 } 1760 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1761 (void)fflush(stdout); 1762 errx(1, "\"-p %s\": patterns must be specified with" 1763 " 1-32 hex digits\n", 1764 fill_pat); 1765 } 1766 1767 i = sscanf(fill_pat, 1768 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1769 &pat[0], &pat[1], &pat[2], &pat[3], 1770 &pat[4], &pat[5], &pat[6], &pat[7], 1771 &pat[8], &pat[9], &pat[10], &pat[11], 1772 &pat[12], &pat[13], &pat[14], &pat[15]); 1773 1774 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1775 opack_icmp.icmp_data[k] = pat[j]; 1776 if (++j >= i) 1777 j = 0; 1778 } 1779 1780 if (!(pingflags & F_QUIET)) { 1781 (void)printf("PATTERN: 0x"); 1782 for (j=0; j<i; j++) 1783 (void)printf("%02x", 1784 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1785 (void)printf("\n"); 1786 } 1787 1788 } 1789 1790 1791 static void 1792 rnd_fill(void) 1793 { 1794 static u_int32_t rnd; 1795 int i; 1796 1797 for (i = PHDR_LEN; i < datalen; i++) { 1798 rnd = (3141592621U * rnd + 663896637U); 1799 opack_icmp.icmp_data[i] = rnd>>24; 1800 } 1801 } 1802 1803 1804 static void 1805 gethost(const char *arg, 1806 const char *name, 1807 struct sockaddr_in *sa, 1808 char *realname, 1809 int realname_len) 1810 { 1811 struct hostent *hp; 1812 1813 (void)memset(sa, 0, sizeof(*sa)); 1814 sa->sin_family = AF_INET; 1815 sa->sin_len = sizeof(struct sockaddr_in); 1816 1817 /* If it is an IP address, try to convert it to a name to 1818 * have something nice to display. 1819 */ 1820 if (inet_aton(name, &sa->sin_addr) != 0) { 1821 if (realname) { 1822 if (pingflags & F_NUMERIC) 1823 hp = 0; 1824 else 1825 hp = gethostbyaddr((char *)&sa->sin_addr, 1826 sizeof(sa->sin_addr), 1827 AF_INET); 1828 (void)strlcpy(realname, hp ? hp->h_name : name, 1829 realname_len); 1830 } 1831 return; 1832 } 1833 1834 hp = gethostbyname(name); 1835 if (!hp) 1836 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1837 1838 if (hp->h_addrtype != AF_INET) 1839 errx(1, "%s only supported with IP", arg); 1840 1841 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1842 1843 if (realname) 1844 (void)strlcpy(realname, hp->h_name, realname_len); 1845 } 1846 1847 1848 static void 1849 usage(void) 1850 { 1851 #ifdef IPSEC 1852 #ifdef IPSEC_POLICY_IPSEC 1853 #define IPSECOPT "\n [-E policy] " 1854 #else 1855 #define IPSECOPT "\n [-AE] " 1856 #endif /*IPSEC_POLICY_IPSEC*/ 1857 #else 1858 #define IPSECOPT "" 1859 #endif /*IPSEC*/ 1860 1861 (void)fprintf(stderr, "usage: \n" 1862 "%s [-adDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1863 " [-i interval] [-I addr]\n" 1864 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1865 " [-w maxwait] " IPSECOPT "host\n", 1866 getprogname()); 1867 exit(1); 1868 } 1869
Indexes created Tue Sep 30 20:09:53 GMT 2025