ping.c revision 1.87.10.1
1 /* $NetBSD: ping.c,v 1.87.10.1 2009/05/03 22:32:12 snj 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 1.87.10.1 2009/05/03 22:32:12 snj 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 datalen = strtol(optarg, &p, 0); 348 if (*p != '\0' || datalen < 0) 349 errx(1, "Bad/invalid packet size %s", optarg); 350 if (datalen > MAXPACKET) 351 errx(1, "packet size is too large"); 352 break; 353 case 'v': 354 pingflags |= F_VERBOSE; 355 break; 356 case 'R': 357 pingflags |= F_RECORD_ROUTE; 358 break; 359 case 'L': 360 pingflags |= F_MCAST_NOLOOP; 361 break; 362 case 't': 363 tos = strtoul(optarg, &p, 0); 364 if (*p != '\0' || tos > 0xFF) 365 errx(1, "bad tos value: %s", optarg); 366 break; 367 case 'T': 368 l = strtol(optarg, &p, 0); 369 if (*p != '\0' || l > 255 || l <= 0) 370 errx(1, "ttl out of range"); 371 ttl = (u_char)l; /* cannot check >255 otherwise */ 372 break; 373 case 'I': 374 pingflags |= F_SOURCE_ADDR; 375 gethost("-I", optarg, &src_addr, 0, 0); 376 break; 377 case 'g': 378 pingflags |= F_SOURCE_ROUTE; 379 gethost("-g", optarg, &send_addr, 0, 0); 380 break; 381 case 'w': 382 maxwait = strtod(optarg, &p); 383 if (*p != '\0' || maxwait <= 0) 384 errx(1, "Bad/invalid maxwait time %s", optarg); 385 break; 386 #ifdef IPSEC 387 #ifdef IPSEC_POLICY_IPSEC 388 case 'E': 389 pingflags |= F_POLICY; 390 if (!strncmp("in", optarg, 2)) { 391 policy_in = strdup(optarg); 392 if (!policy_in) 393 err(1, "strdup"); 394 } else if (!strncmp("out", optarg, 3)) { 395 policy_out = strdup(optarg); 396 if (!policy_out) 397 err(1, "strdup"); 398 } else 399 errx(1, "invalid security policy"); 400 break; 401 #else 402 case 'A': 403 pingflags |= F_AUTHHDR; 404 break; 405 case 'E': 406 pingflags |= F_ENCRYPT; 407 break; 408 #endif /*IPSEC_POLICY_IPSEC*/ 409 #endif /*IPSEC*/ 410 default: 411 usage(); 412 break; 413 } 414 } 415 416 if (interval == 0) 417 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 418 #ifndef sgi 419 if (pingflags & F_FLOOD && getuid()) 420 errx(1, "Must be superuser to use -f"); 421 if (interval < 1.0 && getuid()) 422 errx(1, "Must be superuser to use < 1 sec ping interval"); 423 if (preload > 0 && getuid()) 424 errx(1, "Must be superuser to use -l"); 425 #endif 426 sec_to_timeval(interval, &interval_tv); 427 428 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 429 warnx("Sorry, no audible output for flood pings"); 430 431 if (npackets != 0) { 432 npackets += preload; 433 } else { 434 npackets = INT_MAX; 435 } 436 437 if (hostind == 0) { 438 if (optind != argc-1) 439 usage(); 440 else 441 hostind = optind; 442 } 443 else if (hostind >= argc - 1) 444 usage(); 445 446 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 447 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 448 pingflags |= F_MCAST; 449 if (!(pingflags & F_SOURCE_ROUTE)) 450 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 451 452 loc_addr.sin_family = AF_INET; 453 loc_addr.sin_len = sizeof(struct sockaddr_in); 454 loc_addr.sin_addr.s_addr = htonl((127<<24)+1); 455 456 if (datalen >= PHDR_LEN) /* can we time them? */ 457 pingflags |= F_TIMING; 458 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 459 if ((packet = (u_char *)malloc(packlen)) == NULL) 460 err(1, "Out of memory"); 461 462 if (pingflags & F_PING_FILLED) { 463 fill(); 464 } else if (pingflags & F_PING_RANDOM) { 465 rnd_fill(); 466 } else { 467 for (i = PHDR_LEN; i < datalen; i++) 468 opack_icmp.icmp_data[i] = i; 469 } 470 471 ident = arc4random() & 0xFFFF; 472 473 if (options & SO_DEBUG) { 474 if (setsockopt(s, 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(s, SOL_SOCKET, SO_DONTROUTE, 480 (char *)&on, sizeof(on)) == -1) 481 warn("SO_DONTROUTE"); 482 } 483 484 if (options & SO_DEBUG) { 485 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 486 (char *)&on, sizeof(on)) == -1) 487 warn("Can't turn on socket debugging"); 488 } 489 if (options & SO_DONTROUTE) { 490 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 491 (char *)&on, sizeof(on)) == -1) 492 warn("SO_DONTROUTE"); 493 } 494 495 if (pingflags & F_SOURCE_ROUTE) { 496 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 497 optspace[IPOPT_OLEN] = optlen = 7; 498 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 499 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 500 sizeof(whereto.sin_addr)); 501 optspace[optlen++] = IPOPT_NOP; 502 } 503 if (pingflags & F_RECORD_ROUTE) { 504 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 505 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 506 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 507 optlen = MAX_IPOPTLEN; 508 } 509 /* this leaves opack_ip 0(mod 4) aligned */ 510 opack_ip = (struct ip *)((char *)&out_pack.o_ip 511 + sizeof(out_pack.o_opt) 512 - optlen); 513 (void) memcpy(opack_ip + 1, optspace, optlen); 514 515 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 516 err(1, "Can't set special IP header"); 517 518 opack_ip->ip_v = IPVERSION; 519 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 520 opack_ip->ip_tos = tos; 521 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 522 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 523 opack_ip->ip_p = IPPROTO_ICMP; 524 opack_ip->ip_src = src_addr.sin_addr; 525 opack_ip->ip_dst = send_addr.sin_addr; 526 527 if (pingflags & F_MCAST) { 528 if (pingflags & F_MCAST_NOLOOP) { 529 u_char loop = 0; 530 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 531 (char *) &loop, 1) < 0) 532 err(1, "Can't disable multicast loopback"); 533 } 534 535 if (ttl != 0 536 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 537 (char *) &ttl, 1) < 0) 538 err(1, "Can't set multicast time-to-live"); 539 540 if ((pingflags & F_SOURCE_ADDR) 541 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 542 (char *) &src_addr.sin_addr, 543 sizeof(src_addr.sin_addr)) < 0) 544 err(1, "Can't set multicast source interface"); 545 546 } else if (pingflags & F_SOURCE_ADDR) { 547 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 548 (char *) &src_addr.sin_addr, 549 sizeof(src_addr.sin_addr)) < 0) 550 err(1, "Can't set source interface/address"); 551 } 552 #ifdef IPSEC 553 #ifdef IPSEC_POLICY_IPSEC 554 { 555 char *buf; 556 if (pingflags & F_POLICY) { 557 if (policy_in != NULL) { 558 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 559 if (buf == NULL) 560 errx(1, "%s", ipsec_strerror()); 561 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 562 buf, ipsec_get_policylen(buf)) < 0) { 563 err(1, "ipsec policy cannot be configured"); 564 } 565 free(buf); 566 } 567 if (policy_out != NULL) { 568 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 569 if (buf == NULL) 570 errx(1, "%s", ipsec_strerror()); 571 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 572 buf, ipsec_get_policylen(buf)) < 0) { 573 err(1, "ipsec policy cannot be configured"); 574 } 575 free(buf); 576 } 577 } 578 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 579 if (buf == NULL) 580 errx(1, "%s", ipsec_strerror()); 581 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 582 buf, ipsec_get_policylen(buf)) < 0) { 583 #if 0 584 warnx("ipsec is not configured"); 585 #else 586 /* ignore it, should be okay */ 587 #endif 588 } 589 free(buf); 590 } 591 #else 592 { 593 int optval; 594 if (pingflags & F_AUTHHDR) { 595 optval = IPSEC_LEVEL_REQUIRE; 596 #ifdef IP_AUTH_TRANS_LEVEL 597 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 598 (char *)&optval, sizeof(optval)); 599 #else 600 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 601 (char *)&optval, sizeof(optval)); 602 #endif 603 } 604 if (pingflags & F_ENCRYPT) { 605 optval = IPSEC_LEVEL_REQUIRE; 606 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 607 (char *)&optval, sizeof(optval)); 608 } 609 optval = IPSEC_LEVEL_BYPASS; 610 #ifdef IP_AUTH_TRANS_LEVEL 611 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 612 (char *)&optval, sizeof(optval)); 613 #else 614 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 615 (char *)&optval, sizeof(optval)); 616 #endif 617 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 618 (char *)&optval, sizeof(optval)); 619 } 620 #endif /*IPSEC_POLICY_IPSEC*/ 621 #endif /*IPSEC*/ 622 623 (void)printf("PING %s (%s): %d data bytes\n", hostname, 624 inet_ntoa(whereto.sin_addr), datalen); 625 626 /* When pinging the broadcast address, you can get a lot 627 * of answers. Doing something so evil is useful if you 628 * are trying to stress the ethernet, or just want to 629 * fill the arp cache to get some stuff for /etc/ethers. 630 */ 631 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 632 (char*)&bufspace, sizeof(bufspace))) { 633 if ((bufspace -= 4096) <= 0) 634 err(1, "Cannot set the receive buffer size"); 635 } 636 637 /* make it possible to send giant probes, but do not worry now 638 * if it fails, since we probably won't send giant probes. 639 */ 640 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 641 (char*)&bufspace, sizeof(bufspace)); 642 643 (void)signal(SIGINT, prefinish); 644 645 #ifdef SIGINFO 646 sa.sa_handler = prtsig; 647 sa.sa_flags = SA_NOKERNINFO; 648 sigemptyset(&sa.sa_mask); 649 (void)sigaction(SIGINFO, &sa, NULL); 650 #else 651 (void)signal(SIGQUIT, prtsig); 652 #endif 653 (void)signal(SIGCONT, prtsig); 654 655 /* fire off them quickies */ 656 for (i = 0; i < preload; i++) { 657 (void)gettimeofday(&now, 0); 658 pinger(); 659 } 660 661 doit(); 662 return 0; 663 } 664 665 666 static void 667 doit(void) 668 { 669 int cc; 670 struct sockaddr_in from; 671 socklen_t fromlen; 672 double sec, last, d_last; 673 struct pollfd fdmaskp[1]; 674 675 (void)gettimeofday(&clear_cache,0); 676 if (maxwait != 0) { 677 last = timeval_to_sec(&clear_cache) + maxwait; 678 d_last = 0; 679 } else { 680 last = 0; 681 d_last = 365*24*60*60; 682 } 683 684 do { 685 (void)gettimeofday(&now,0); 686 687 if (last != 0) 688 d_last = last - timeval_to_sec(&now); 689 690 if (ntransmitted < npackets && d_last > 0) { 691 /* send if within 100 usec or late for next packet */ 692 sec = diffsec(&next_tx,&now); 693 if (sec <= 0.0001 || 694 (lastrcvd && (pingflags & F_FLOOD))) { 695 pinger(); 696 sec = diffsec(&next_tx,&now); 697 } 698 if (sec < 0.0) 699 sec = 0.0; 700 if (d_last < sec) 701 sec = d_last; 702 703 } else { 704 /* For the last response, wait twice as long as the 705 * worst case seen, or 10 times as long as the 706 * maximum interpacket interval, whichever is longer. 707 */ 708 sec = MAX(2 * tmax, 10 * interval) - 709 diffsec(&now, &last_tx); 710 if (d_last < sec) 711 sec = d_last; 712 if (sec <= 0) 713 break; 714 } 715 716 717 fdmaskp[0].fd = s; 718 fdmaskp[0].events = POLLIN; 719 cc = poll(fdmaskp, 1, (int)(sec * 1000)); 720 if (cc <= 0) { 721 if (cc < 0) { 722 if (errno == EINTR) 723 continue; 724 jiggle_flush(1); 725 err(1, "poll"); 726 } 727 continue; 728 } 729 730 fromlen = sizeof(from); 731 cc = recvfrom(s, (char *) packet, packlen, 732 0, (struct sockaddr *)&from, 733 &fromlen); 734 if (cc < 0) { 735 if (errno != EINTR) { 736 jiggle_flush(1); 737 warn("recvfrom"); 738 (void)fflush(stderr); 739 } 740 continue; 741 } 742 (void)gettimeofday(&now, 0); 743 pr_pack(packet, cc, &from); 744 745 } while (nreceived < npackets 746 && (nreceived == 0 || !(pingflags & F_ONCE))); 747 748 finish(0); 749 } 750 751 752 static void 753 jiggle_flush(int nl) /* new line if there are dots */ 754 { 755 int serrno = errno; 756 757 if (jiggle_cnt > 0) { 758 total_jiggled += jiggle_cnt; 759 jiggle_direction = 1; 760 do { 761 (void)putchar('.'); 762 } while (--jiggle_cnt > 0); 763 764 } else if (jiggle_cnt < 0) { 765 total_jiggled -= jiggle_cnt; 766 jiggle_direction = -1; 767 do { 768 (void)putchar('\b'); 769 } while (++jiggle_cnt < 0); 770 } 771 772 if (nl) { 773 if (total_jiggled != 0) 774 (void)putchar('\n'); 775 total_jiggled = 0; 776 jiggle_direction = -1; 777 } 778 779 (void)fflush(stdout); 780 (void)fflush(stderr); 781 jiggle_time = now; 782 errno = serrno; 783 } 784 785 786 /* jiggle the cursor for flood-ping 787 */ 788 static void 789 jiggle(int delta) 790 { 791 double dt; 792 793 if (pingflags & F_QUIET) 794 return; 795 796 /* do not back up into messages */ 797 if (total_jiggled+jiggle_cnt+delta < 0) 798 return; 799 800 jiggle_cnt += delta; 801 802 /* flush the FLOOD dots when things are quiet 803 * or occassionally to make the cursor jiggle. 804 */ 805 dt = diffsec(&last_tx, &jiggle_time); 806 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 807 jiggle_flush(0); 808 } 809 810 811 /* 812 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 813 * will be added on by the kernel. The ID field is our UNIX process ID, 814 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 815 * of the data portion are used to hold a UNIX "timeval" struct in VAX 816 * byte-order, to compute the round-trip time. 817 */ 818 static void 819 pinger(void) 820 { 821 struct tv32 tv32; 822 int i, cc, sw; 823 824 opack_icmp.icmp_code = 0; 825 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 826 827 /* clear the cached route in the kernel after an ICMP 828 * response such as a Redirect is seen to stop causing 829 * more such packets. Also clear the cached route 830 * periodically in case of routing changes that make 831 * black holes come and go. 832 */ 833 if (clear_cache.tv_sec != now.tv_sec) { 834 opack_icmp.icmp_type = ICMP_ECHOREPLY; 835 opack_icmp.icmp_id = ~ident; 836 opack_icmp.icmp_cksum = 0; 837 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 838 PHDR_LEN); 839 sw = 0; 840 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 841 (char *)&sw,sizeof(sw)) < 0) 842 err(1, "Can't turn off special IP header"); 843 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 844 (struct sockaddr *)&loc_addr, 845 sizeof(struct sockaddr_in)) < 0) { 846 /* 847 * XXX: we only report this as a warning in verbose 848 * mode because people get confused when they see 849 * this error when they are running in single user 850 * mode and they have not configured lo0 851 */ 852 if (pingflags & F_VERBOSE) 853 warn("failed to clear cached route"); 854 } 855 sw = 1; 856 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 857 (char *)&sw, sizeof(sw)) < 0) 858 err(1, "Can't set special IP header"); 859 860 (void)gettimeofday(&clear_cache,0); 861 } 862 863 opack_icmp.icmp_type = ICMP_ECHO; 864 opack_icmp.icmp_id = ident; 865 tv32.tv32_sec = htonl(now.tv_sec); 866 tv32.tv32_usec = htonl(now.tv_usec); 867 if (pingflags & F_TIMING) 868 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 869 cc = datalen + PHDR_LEN; 870 opack_icmp.icmp_cksum = 0; 871 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 872 873 cc += opack_ip->ip_hl<<2; 874 opack_ip->ip_len = cc; 875 i = sendto(s, (char *) opack_ip, cc, 0, 876 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 877 if (i != cc) { 878 jiggle_flush(1); 879 if (i < 0) 880 warn("sendto"); 881 else 882 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 883 (void)fflush(stderr); 884 } 885 lastrcvd = 0; 886 887 CLR(ntransmitted); 888 ntransmitted++; 889 890 last_tx = now; 891 if (next_tx.tv_sec == 0) { 892 first_tx = now; 893 next_tx = now; 894 } 895 896 /* Transmit regularly, at always the same microsecond in the 897 * second when going at one packet per second. 898 * If we are at most 100 ms behind, send extras to get caught up. 899 * Otherwise, skip packets we were too slow to send. 900 */ 901 if (diffsec(&next_tx, &now) <= interval) { 902 do { 903 timevaladd(&next_tx, &interval_tv); 904 } while (diffsec(&next_tx, &now) < -0.1); 905 } 906 907 if (pingflags & F_FLOOD) 908 jiggle(1); 909 910 /* While the packet is going out, ready buffer for the next 911 * packet. Use a fast but not very good random number generator. 912 */ 913 if (pingflags & F_PING_RANDOM) 914 rnd_fill(); 915 } 916 917 918 static void 919 pr_pack_sub(int cc, 920 char *addr, 921 int seqno, 922 int dupflag, 923 int ttl, 924 double triptime) 925 { 926 jiggle_flush(1); 927 928 if (pingflags & F_FLOOD) 929 return; 930 931 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 932 if (dupflag) 933 (void)printf(" DUP!"); 934 (void)printf(" ttl=%d", ttl); 935 if (pingflags & F_TIMING) 936 (void)printf(" time=%.3f ms", triptime*1000.0); 937 938 /* 939 * Send beep to stderr, since that's more likely than stdout 940 * to go to a terminal.. 941 */ 942 if (pingflags & F_AUDIBLE && !dupflag) 943 (void)fprintf(stderr,"\a"); 944 } 945 946 947 /* 948 * Print out the packet, if it came from us. This logic is necessary 949 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 950 * which arrive ('tis only fair). This permits multiple copies of this 951 * program to be run without having intermingled output (or statistics!). 952 */ 953 static void 954 pr_pack(u_char *buf, 955 int tot_len, 956 struct sockaddr_in *from) 957 { 958 struct ip *ip; 959 struct icmp *icp; 960 int i, j, net_len; 961 u_char *cp; 962 static int old_rrlen; 963 static char old_rr[MAX_IPOPTLEN]; 964 int hlen, dupflag = 0, dumped; 965 double triptime = 0.0; 966 #define PR_PACK_SUB() {if (!dumped) { \ 967 dumped = 1; \ 968 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 969 ntohs((u_int16_t)icp->icmp_seq), \ 970 dupflag, ip->ip_ttl, triptime);}} 971 972 /* Check the IP header */ 973 ip = (struct ip *) buf; 974 hlen = ip->ip_hl << 2; 975 if (tot_len < hlen + ICMP_MINLEN) { 976 if (pingflags & F_VERBOSE) { 977 jiggle_flush(1); 978 (void)printf("packet too short (%d bytes) from %s\n", 979 tot_len, inet_ntoa(from->sin_addr)); 980 } 981 return; 982 } 983 984 /* Now the ICMP part */ 985 dumped = 0; 986 net_len = tot_len - hlen; 987 icp = (struct icmp *)(buf + hlen); 988 if (icp->icmp_type == ICMP_ECHOREPLY 989 && icp->icmp_id == ident) { 990 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 991 lastrcvd = 1; 992 last_rx = now; 993 if (first_rx.tv_sec == 0) 994 first_rx = last_rx; 995 nreceived++; 996 if (pingflags & F_TIMING) { 997 struct timeval tv; 998 struct tv32 tv32; 999 1000 (void) memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 1001 tv.tv_sec = ntohl(tv32.tv32_sec); 1002 tv.tv_usec = ntohl(tv32.tv32_usec); 1003 triptime = diffsec(&last_rx, &tv); 1004 tsum += triptime; 1005 tsumsq += triptime * triptime; 1006 if (triptime < tmin) 1007 tmin = triptime; 1008 if (triptime > tmax) 1009 tmax = triptime; 1010 } 1011 1012 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1013 nrepeats++, nreceived--; 1014 dupflag=1; 1015 } else { 1016 SET(ntohs((u_int16_t)icp->icmp_seq)); 1017 } 1018 1019 if (tot_len != opack_ip->ip_len) { 1020 PR_PACK_SUB(); 1021 switch (opack_ip->ip_len - tot_len) { 1022 case MAX_IPOPTLEN: 1023 if ((pongflags & F_RECORD_ROUTE) != 0) 1024 break; 1025 if ((pingflags & F_RECORD_ROUTE) == 0) 1026 goto out; 1027 pongflags |= F_RECORD_ROUTE; 1028 (void)printf("\nremote host does not " 1029 "support record route"); 1030 break; 1031 case 8: 1032 if ((pongflags & F_SOURCE_ROUTE) != 0) 1033 break; 1034 if ((pingflags & F_SOURCE_ROUTE) == 0) 1035 goto out; 1036 pongflags |= F_SOURCE_ROUTE; 1037 (void)printf("\nremote host does not " 1038 "support source route"); 1039 break; 1040 default: 1041 out: 1042 (void)printf("\nwrong total length %d " 1043 "instead of %d", tot_len, opack_ip->ip_len); 1044 break; 1045 } 1046 } 1047 1048 if (!dupflag) { 1049 static u_int16_t last_seqno = 0xffff; 1050 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1051 u_int16_t gap = seqno - (last_seqno + 1); 1052 if (gap > 0 && gap < 0x8000 && 1053 (pingflags & F_VERBOSE)) { 1054 (void)printf("[*** sequence gap of %u " 1055 "packets from %u ... %u ***]\n", gap, 1056 (u_int16_t) (last_seqno + 1), 1057 (u_int16_t) (seqno - 1)); 1058 if (pingflags & F_QUIET) 1059 summary(0); 1060 } 1061 1062 if (gap < 0x8000) 1063 last_seqno = seqno; 1064 } 1065 1066 if (pingflags & F_QUIET) 1067 return; 1068 1069 if (!(pingflags & F_FLOOD)) 1070 PR_PACK_SUB(); 1071 1072 /* check the data */ 1073 if (datalen > PHDR_LEN 1074 && !(pingflags & F_PING_RANDOM) 1075 && memcmp(&icp->icmp_data[PHDR_LEN], 1076 &opack_icmp.icmp_data[PHDR_LEN], 1077 datalen-PHDR_LEN)) { 1078 for (i=PHDR_LEN; i<datalen; i++) { 1079 if (icp->icmp_data[i] != 1080 opack_icmp.icmp_data[i]) 1081 break; 1082 } 1083 PR_PACK_SUB(); 1084 (void)printf("\nwrong data byte #%d should have been" 1085 " %#x but was %#x", i, 1086 (u_char)opack_icmp.icmp_data[i], 1087 (u_char)icp->icmp_data[i]); 1088 for (i=PHDR_LEN; i<datalen; i++) { 1089 if ((i%16) == PHDR_LEN) 1090 (void)printf("\n\t"); 1091 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1092 } 1093 } 1094 1095 } else { 1096 if (!pr_icmph(icp, from, net_len)) 1097 return; 1098 dumped = 2; 1099 } 1100 1101 /* Display any IP options */ 1102 cp = buf + sizeof(struct ip); 1103 while (hlen > (int)sizeof(struct ip)) { 1104 switch (*cp) { 1105 case IPOPT_EOL: 1106 hlen = 0; 1107 break; 1108 case IPOPT_LSRR: 1109 hlen -= 2; 1110 j = *++cp; 1111 ++cp; 1112 j -= IPOPT_MINOFF; 1113 if (j <= 0) 1114 continue; 1115 if (dumped <= 1) { 1116 j = ((j+3)/4)*4; 1117 hlen -= j; 1118 cp += j; 1119 break; 1120 } 1121 PR_PACK_SUB(); 1122 (void)printf("\nLSRR: "); 1123 for (;;) { 1124 pr_saddr(cp); 1125 cp += 4; 1126 hlen -= 4; 1127 j -= 4; 1128 if (j <= 0) 1129 break; 1130 (void)putchar('\n'); 1131 } 1132 break; 1133 case IPOPT_RR: 1134 j = *++cp; /* get length */ 1135 i = *++cp; /* and pointer */ 1136 hlen -= 2; 1137 if (i > j) 1138 i = j; 1139 i -= IPOPT_MINOFF; 1140 if (i <= 0) 1141 continue; 1142 if (dumped <= 1) { 1143 if (i == old_rrlen 1144 && !memcmp(cp, old_rr, i)) { 1145 if (dumped) 1146 (void)printf("\t(same route)"); 1147 j = ((i+3)/4)*4; 1148 hlen -= j; 1149 cp += j; 1150 break; 1151 } 1152 old_rrlen = i; 1153 (void) memcpy(old_rr, cp, i); 1154 } 1155 if (!dumped) { 1156 jiggle_flush(1); 1157 (void)printf("RR: "); 1158 dumped = 1; 1159 } else { 1160 (void)printf("\nRR: "); 1161 } 1162 for (;;) { 1163 pr_saddr(cp); 1164 cp += 4; 1165 hlen -= 4; 1166 i -= 4; 1167 if (i <= 0) 1168 break; 1169 (void)putchar('\n'); 1170 } 1171 break; 1172 case IPOPT_NOP: 1173 if (dumped <= 1) 1174 break; 1175 PR_PACK_SUB(); 1176 (void)printf("\nNOP"); 1177 break; 1178 #ifdef sgi 1179 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1180 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1181 case IPOPT_CIPSO: /* Commercial IPSO */ 1182 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1183 i = (unsigned)cp[1]; 1184 hlen -= i - 1; 1185 PR_PACK_SUB(); 1186 (void)printf("\nSEC:"); 1187 while (i--) { 1188 (void)printf(" %02x", *cp++); 1189 } 1190 cp--; 1191 break; 1192 } 1193 #endif 1194 default: 1195 PR_PACK_SUB(); 1196 (void)printf("\nunknown option 0x%x", *cp); 1197 break; 1198 } 1199 hlen--; 1200 cp++; 1201 } 1202 1203 if (dumped) { 1204 (void)putchar('\n'); 1205 (void)fflush(stdout); 1206 } else { 1207 jiggle(-1); 1208 } 1209 } 1210 1211 1212 /* Compute the IP checksum 1213 * This assumes the packet is less than 32K long. 1214 */ 1215 static u_int16_t 1216 in_cksum(u_int16_t *p, u_int len) 1217 { 1218 u_int32_t sum = 0; 1219 int nwords = len >> 1; 1220 1221 while (nwords-- != 0) 1222 sum += *p++; 1223 1224 if (len & 1) { 1225 union { 1226 u_int16_t w; 1227 u_int8_t c[2]; 1228 } u; 1229 u.c[0] = *(u_char *)p; 1230 u.c[1] = 0; 1231 sum += u.w; 1232 } 1233 1234 /* end-around-carry */ 1235 sum = (sum >> 16) + (sum & 0xffff); 1236 sum += (sum >> 16); 1237 return (~sum); 1238 } 1239 1240 1241 /* 1242 * compute the difference of two timevals in seconds 1243 */ 1244 static double 1245 diffsec(struct timeval *timenow, 1246 struct timeval *then) 1247 { 1248 return ((timenow->tv_sec - then->tv_sec)*1.0 1249 + (timenow->tv_usec - then->tv_usec)/1000000.0); 1250 } 1251 1252 1253 static void 1254 timevaladd(struct timeval *t1, 1255 struct timeval *t2) 1256 { 1257 1258 t1->tv_sec += t2->tv_sec; 1259 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1260 t1->tv_sec++; 1261 t1->tv_usec -= 1000000; 1262 } 1263 } 1264 1265 1266 static void 1267 sec_to_timeval(const double sec, struct timeval *tp) 1268 { 1269 tp->tv_sec = sec; 1270 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1271 } 1272 1273 1274 static double 1275 timeval_to_sec(const struct timeval *tp) 1276 { 1277 return tp->tv_sec + tp->tv_usec / 1000000.0; 1278 } 1279 1280 1281 /* 1282 * Print statistics. 1283 * Heavily buffered STDIO is used here, so that all the statistics 1284 * will be written with 1 sys-write call. This is nice when more 1285 * than one copy of the program is running on a terminal; it prevents 1286 * the statistics output from becomming intermingled. 1287 */ 1288 static void 1289 summary(int header) 1290 { 1291 jiggle_flush(1); 1292 1293 if (header) 1294 (void)printf("\n----%s PING Statistics----\n", hostname); 1295 (void)printf("%d packets transmitted, ", ntransmitted); 1296 (void)printf("%d packets received, ", nreceived); 1297 if (nrepeats) 1298 (void)printf("+%d duplicates, ", nrepeats); 1299 if (ntransmitted) { 1300 if (nreceived > ntransmitted) 1301 (void)printf("-- somebody's duplicating packets!"); 1302 else 1303 (void)printf("%.1f%% packet loss", 1304 (((ntransmitted-nreceived)*100.0) / 1305 ntransmitted)); 1306 } 1307 (void)printf("\n"); 1308 if (nreceived && (pingflags & F_TIMING)) { 1309 double n = nreceived + nrepeats; 1310 double avg = (tsum / n); 1311 double variance = 0.0; 1312 if (n>1) 1313 variance = (tsumsq - n*avg*avg) /(n-1); 1314 1315 printf("round-trip min/avg/max/stddev = " 1316 "%.3f/%.3f/%.3f/%.3f ms\n", 1317 tmin * 1000.0, avg * 1000.0, 1318 tmax * 1000.0, sqrt(variance) * 1000.0); 1319 if (pingflags & F_FLOOD) { 1320 double r = diffsec(&last_rx, &first_rx); 1321 double t = diffsec(&last_tx, &first_tx); 1322 if (r == 0) 1323 r = 0.0001; 1324 if (t == 0) 1325 t = 0.0001; 1326 (void)printf(" %.1f packets/sec sent, " 1327 " %.1f packets/sec received\n", 1328 ntransmitted/t, nreceived/r); 1329 } 1330 } 1331 } 1332 1333 1334 /* 1335 * Print statistics when SIGINFO is received. 1336 */ 1337 /* ARGSUSED */ 1338 static void 1339 prtsig(int dummy) 1340 { 1341 1342 summary(0); 1343 #ifndef SIGINFO 1344 (void)signal(SIGQUIT, prtsig); 1345 #endif 1346 } 1347 1348 1349 /* 1350 * On the first SIGINT, allow any outstanding packets to dribble in 1351 */ 1352 static void 1353 prefinish(int dummy) 1354 { 1355 if (lastrcvd /* quit now if caught up */ 1356 || nreceived == 0) /* or if remote is dead */ 1357 finish(0); 1358 1359 (void)signal(dummy, finish); /* do this only the 1st time */ 1360 1361 if (npackets > ntransmitted) /* let the normal limit work */ 1362 npackets = ntransmitted; 1363 } 1364 1365 /* 1366 * Print statistics and give up. 1367 */ 1368 /* ARGSUSED */ 1369 static void 1370 finish(int dummy) 1371 { 1372 #ifdef SIGINFO 1373 (void)signal(SIGINFO, SIG_DFL); 1374 #else 1375 (void)signal(SIGQUIT, SIG_DFL); 1376 #endif 1377 1378 summary(1); 1379 exit(nreceived > 0 ? 0 : 2); 1380 } 1381 1382 1383 static int /* 0=do not print it */ 1384 ck_pr_icmph(struct icmp *icp, 1385 struct sockaddr_in *from, 1386 int cc, 1387 int override) /* 1=override VERBOSE if interesting */ 1388 { 1389 int hlen; 1390 struct ip ipb, *ip = &ipb; 1391 struct icmp icp2b, *icp2 = &icp2b; 1392 int res; 1393 1394 if (pingflags & F_VERBOSE) { 1395 res = 1; 1396 jiggle_flush(1); 1397 } else { 1398 res = 0; 1399 } 1400 1401 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1402 hlen = ip->ip_hl << 2; 1403 if (ip->ip_p == IPPROTO_ICMP 1404 && hlen + 6 <= cc) { 1405 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1406 if (icp2->icmp_id == ident) { 1407 /* remember to clear route cached in kernel 1408 * if this non-Echo-Reply ICMP message was for one 1409 * of our packets. 1410 */ 1411 clear_cache.tv_sec = 0; 1412 1413 if (!res && override 1414 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1415 jiggle_flush(1); 1416 (void)printf("%d bytes from %s: ", 1417 cc, pr_addr(&from->sin_addr)); 1418 res = 1; 1419 } 1420 } 1421 } 1422 1423 return res; 1424 } 1425 1426 1427 /* 1428 * Print a descriptive string about an ICMP header other than an echo reply. 1429 */ 1430 static int /* 0=printed nothing */ 1431 pr_icmph(struct icmp *icp, 1432 struct sockaddr_in *from, 1433 int cc) 1434 { 1435 switch (icp->icmp_type ) { 1436 case ICMP_UNREACH: 1437 if (!ck_pr_icmph(icp, from, cc, 1)) 1438 return 0; 1439 switch (icp->icmp_code) { 1440 case ICMP_UNREACH_NET: 1441 (void)printf("Destination Net Unreachable"); 1442 break; 1443 case ICMP_UNREACH_HOST: 1444 (void)printf("Destination Host Unreachable"); 1445 break; 1446 case ICMP_UNREACH_PROTOCOL: 1447 (void)printf("Destination Protocol Unreachable"); 1448 break; 1449 case ICMP_UNREACH_PORT: 1450 (void)printf("Destination Port Unreachable"); 1451 break; 1452 case ICMP_UNREACH_NEEDFRAG: 1453 (void)printf("frag needed and DF set. Next MTU=%d", 1454 ntohs(icp->icmp_nextmtu)); 1455 break; 1456 case ICMP_UNREACH_SRCFAIL: 1457 (void)printf("Source Route Failed"); 1458 break; 1459 case ICMP_UNREACH_NET_UNKNOWN: 1460 (void)printf("Unreachable unknown net"); 1461 break; 1462 case ICMP_UNREACH_HOST_UNKNOWN: 1463 (void)printf("Unreachable unknown host"); 1464 break; 1465 case ICMP_UNREACH_ISOLATED: 1466 (void)printf("Unreachable host isolated"); 1467 break; 1468 case ICMP_UNREACH_NET_PROHIB: 1469 (void)printf("Net prohibited access"); 1470 break; 1471 case ICMP_UNREACH_HOST_PROHIB: 1472 (void)printf("Host prohibited access"); 1473 break; 1474 case ICMP_UNREACH_TOSNET: 1475 (void)printf("Bad TOS for net"); 1476 break; 1477 case ICMP_UNREACH_TOSHOST: 1478 (void)printf("Bad TOS for host"); 1479 break; 1480 case 13: 1481 (void)printf("Communication prohibited"); 1482 break; 1483 case 14: 1484 (void)printf("Host precedence violation"); 1485 break; 1486 case 15: 1487 (void)printf("Precedence cutoff"); 1488 break; 1489 default: 1490 (void)printf("Bad Destination Unreachable Code: %d", 1491 icp->icmp_code); 1492 break; 1493 } 1494 /* Print returned IP header information */ 1495 pr_retip(icp, cc); 1496 break; 1497 1498 case ICMP_SOURCEQUENCH: 1499 if (!ck_pr_icmph(icp, from, cc, 1)) 1500 return 0; 1501 (void)printf("Source Quench"); 1502 pr_retip(icp, cc); 1503 break; 1504 1505 case ICMP_REDIRECT: 1506 if (!ck_pr_icmph(icp, from, cc, 1)) 1507 return 0; 1508 switch (icp->icmp_code) { 1509 case ICMP_REDIRECT_NET: 1510 (void)printf("Redirect Network"); 1511 break; 1512 case ICMP_REDIRECT_HOST: 1513 (void)printf("Redirect Host"); 1514 break; 1515 case ICMP_REDIRECT_TOSNET: 1516 (void)printf("Redirect Type of Service and Network"); 1517 break; 1518 case ICMP_REDIRECT_TOSHOST: 1519 (void)printf("Redirect Type of Service and Host"); 1520 break; 1521 default: 1522 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1523 break; 1524 } 1525 (void)printf(" New router addr: %s", 1526 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1527 pr_retip(icp, cc); 1528 break; 1529 1530 case ICMP_ECHO: 1531 if (!ck_pr_icmph(icp, from, cc, 0)) 1532 return 0; 1533 (void)printf("Echo Request: ID=%d seq=%d", 1534 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1535 break; 1536 1537 case ICMP_ECHOREPLY: 1538 /* displaying other's pings is too noisey */ 1539 #if 0 1540 if (!ck_pr_icmph(icp, from, cc, 0)) 1541 return 0; 1542 (void)printf("Echo Reply: ID=%d seq=%d", 1543 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1544 break; 1545 #else 1546 return 0; 1547 #endif 1548 1549 case ICMP_ROUTERADVERT: 1550 if (!ck_pr_icmph(icp, from, cc, 0)) 1551 return 0; 1552 (void)printf("Router Discovery Advert"); 1553 break; 1554 1555 case ICMP_ROUTERSOLICIT: 1556 if (!ck_pr_icmph(icp, from, cc, 0)) 1557 return 0; 1558 (void)printf("Router Discovery Solicit"); 1559 break; 1560 1561 case ICMP_TIMXCEED: 1562 if (!ck_pr_icmph(icp, from, cc, 1)) 1563 return 0; 1564 switch (icp->icmp_code ) { 1565 case ICMP_TIMXCEED_INTRANS: 1566 (void)printf("Time To Live exceeded"); 1567 break; 1568 case ICMP_TIMXCEED_REASS: 1569 (void)printf("Frag reassembly time exceeded"); 1570 break; 1571 default: 1572 (void)printf("Time exceeded, Bad Code: %d", 1573 icp->icmp_code); 1574 break; 1575 } 1576 pr_retip(icp, cc); 1577 break; 1578 1579 case ICMP_PARAMPROB: 1580 if (!ck_pr_icmph(icp, from, cc, 1)) 1581 return 0; 1582 (void)printf("Parameter problem: pointer = 0x%02x", 1583 icp->icmp_hun.ih_pptr); 1584 pr_retip(icp, cc); 1585 break; 1586 1587 case ICMP_TSTAMP: 1588 if (!ck_pr_icmph(icp, from, cc, 0)) 1589 return 0; 1590 (void)printf("Timestamp"); 1591 break; 1592 1593 case ICMP_TSTAMPREPLY: 1594 if (!ck_pr_icmph(icp, from, cc, 0)) 1595 return 0; 1596 (void)printf("Timestamp Reply"); 1597 break; 1598 1599 case ICMP_IREQ: 1600 if (!ck_pr_icmph(icp, from, cc, 0)) 1601 return 0; 1602 (void)printf("Information Request"); 1603 break; 1604 1605 case ICMP_IREQREPLY: 1606 if (!ck_pr_icmph(icp, from, cc, 0)) 1607 return 0; 1608 (void)printf("Information Reply"); 1609 break; 1610 1611 case ICMP_MASKREQ: 1612 if (!ck_pr_icmph(icp, from, cc, 0)) 1613 return 0; 1614 (void)printf("Address Mask Request"); 1615 break; 1616 1617 case ICMP_MASKREPLY: 1618 if (!ck_pr_icmph(icp, from, cc, 0)) 1619 return 0; 1620 (void)printf("Address Mask Reply"); 1621 break; 1622 1623 default: 1624 if (!ck_pr_icmph(icp, from, cc, 0)) 1625 return 0; 1626 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1627 if (pingflags & F_VERBOSE) 1628 pr_iph(icp, cc); 1629 } 1630 1631 return 1; 1632 } 1633 1634 1635 /* 1636 * Print an IP header with options. 1637 */ 1638 static void 1639 pr_iph(struct icmp *icp, 1640 int cc) 1641 { 1642 int hlen; 1643 u_char *cp; 1644 struct ip ipb, *ip = &ipb; 1645 1646 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1647 1648 hlen = ip->ip_hl << 2; 1649 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1650 1651 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1652 (void)printf(" %1x %1x %02x %04x %04x", 1653 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1654 (void)printf(" %1x %04x", 1655 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1656 (void)printf(" %02x %02x %04x", 1657 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1658 (void)printf(" %15s ", 1659 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1660 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1661 /* dump any option bytes */ 1662 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1663 (void)printf("%02x", *cp++); 1664 } 1665 } 1666 1667 /* 1668 * Print an ASCII host address starting from a string of bytes. 1669 */ 1670 static void 1671 pr_saddr(u_char *cp) 1672 { 1673 n_long l; 1674 struct in_addr addr; 1675 1676 l = (u_char)*++cp; 1677 l = (l<<8) + (u_char)*++cp; 1678 l = (l<<8) + (u_char)*++cp; 1679 l = (l<<8) + (u_char)*++cp; 1680 addr.s_addr = htonl(l); 1681 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1682 } 1683 1684 1685 /* 1686 * Return an ASCII host address 1687 * as a dotted quad and optionally with a hostname 1688 */ 1689 static char * 1690 pr_addr(struct in_addr *addr) /* in network order */ 1691 { 1692 struct hostent *hp; 1693 static char buf[MAXHOSTNAMELEN+4+16+1]; 1694 1695 if ((pingflags & F_NUMERIC) 1696 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1697 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1698 } else { 1699 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1700 inet_ntoa(*addr)); 1701 } 1702 1703 return buf; 1704 } 1705 1706 /* 1707 * Dump some info on a returned (via ICMP) IP packet. 1708 */ 1709 static void 1710 pr_retip(struct icmp *icp, 1711 int cc) 1712 { 1713 int hlen; 1714 u_char *cp; 1715 struct ip ipb, *ip = &ipb; 1716 1717 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1718 1719 if (pingflags & F_VERBOSE) 1720 pr_iph(icp, cc); 1721 1722 hlen = ip->ip_hl << 2; 1723 cp = (u_char *) &icp->icmp_data[hlen]; 1724 1725 if (ip->ip_p == IPPROTO_TCP) { 1726 if (pingflags & F_VERBOSE) 1727 (void)printf("\n TCP: from port %u, to port %u", 1728 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1729 } else if (ip->ip_p == IPPROTO_UDP) { 1730 if (pingflags & F_VERBOSE) 1731 (void)printf("\n UDP: from port %u, to port %u", 1732 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1733 } else if (ip->ip_p == IPPROTO_ICMP) { 1734 struct icmp icp2; 1735 (void) memcpy(&icp2, cp, sizeof(icp2)); 1736 if (icp2.icmp_type == ICMP_ECHO) { 1737 if (pingflags & F_VERBOSE) 1738 (void)printf("\n ID=%u icmp_seq=%u", 1739 ntohs((u_int16_t)icp2.icmp_id), 1740 ntohs((u_int16_t)icp2.icmp_seq)); 1741 else 1742 (void)printf(" for icmp_seq=%u", 1743 ntohs((u_int16_t)icp2.icmp_seq)); 1744 } 1745 } 1746 } 1747 1748 static void 1749 fill(void) 1750 { 1751 int i, j, k; 1752 char *cp; 1753 int pat[16]; 1754 1755 for (cp = fill_pat; *cp != '\0'; cp++) { 1756 if (!isxdigit((unsigned char)*cp)) 1757 break; 1758 } 1759 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1760 (void)fflush(stdout); 1761 errx(1, "\"-p %s\": patterns must be specified with" 1762 " 1-32 hex digits\n", 1763 fill_pat); 1764 } 1765 1766 i = sscanf(fill_pat, 1767 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1768 &pat[0], &pat[1], &pat[2], &pat[3], 1769 &pat[4], &pat[5], &pat[6], &pat[7], 1770 &pat[8], &pat[9], &pat[10], &pat[11], 1771 &pat[12], &pat[13], &pat[14], &pat[15]); 1772 1773 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1774 opack_icmp.icmp_data[k] = pat[j]; 1775 if (++j >= i) 1776 j = 0; 1777 } 1778 1779 if (!(pingflags & F_QUIET)) { 1780 (void)printf("PATTERN: 0x"); 1781 for (j=0; j<i; j++) 1782 (void)printf("%02x", 1783 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1784 (void)printf("\n"); 1785 } 1786 1787 } 1788 1789 1790 static void 1791 rnd_fill(void) 1792 { 1793 static u_int32_t rnd; 1794 int i; 1795 1796 for (i = PHDR_LEN; i < datalen; i++) { 1797 rnd = (3141592621U * rnd + 663896637U); 1798 opack_icmp.icmp_data[i] = rnd>>24; 1799 } 1800 } 1801 1802 1803 static void 1804 gethost(const char *arg, 1805 const char *name, 1806 struct sockaddr_in *sa, 1807 char *realname, 1808 int realname_len) 1809 { 1810 struct hostent *hp; 1811 1812 (void)memset(sa, 0, sizeof(*sa)); 1813 sa->sin_family = AF_INET; 1814 sa->sin_len = sizeof(struct sockaddr_in); 1815 1816 /* If it is an IP address, try to convert it to a name to 1817 * have something nice to display. 1818 */ 1819 if (inet_aton(name, &sa->sin_addr) != 0) { 1820 if (realname) { 1821 if (pingflags & F_NUMERIC) 1822 hp = 0; 1823 else 1824 hp = gethostbyaddr((char *)&sa->sin_addr, 1825 sizeof(sa->sin_addr), 1826 AF_INET); 1827 (void)strlcpy(realname, hp ? hp->h_name : name, 1828 realname_len); 1829 } 1830 return; 1831 } 1832 1833 hp = gethostbyname(name); 1834 if (!hp) 1835 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1836 1837 if (hp->h_addrtype != AF_INET) 1838 errx(1, "%s only supported with IP", arg); 1839 1840 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1841 1842 if (realname) 1843 (void)strlcpy(realname, hp->h_name, realname_len); 1844 } 1845 1846 1847 static void 1848 usage(void) 1849 { 1850 #ifdef IPSEC 1851 #ifdef IPSEC_POLICY_IPSEC 1852 #define IPSECOPT "\n [-E policy] " 1853 #else 1854 #define IPSECOPT "\n [-AE] " 1855 #endif /*IPSEC_POLICY_IPSEC*/ 1856 #else 1857 #define IPSECOPT "" 1858 #endif /*IPSEC*/ 1859 1860 (void)fprintf(stderr, "usage: \n" 1861 "%s [-adDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1862 " [-i interval] [-I addr]\n" 1863 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1864 " [-w maxwait] " IPSECOPT "host\n", 1865 getprogname()); 1866 exit(1); 1867 } 1868
Indexes created Tue Oct 21 16:10:11 GMT 2025