ping.c revision 1.77.4.1
1 /* $NetBSD: ping.c,v 1.77.4.1 2007/08/26 19:55:21 bouyer 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 1.77.4.1 2007/08/26 19:55:21 bouyer Exp $"); 62 #endif 63 64 #include <stdio.h> 65 #include <stddef.h> 66 #include <errno.h> 67 #include <sys/time.h> 68 #include <sys/types.h> 69 #include <sys/signal.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 #include <err.h> 93 #endif 94 95 #include <netinet/in_systm.h> 96 #include <netinet/in.h> 97 #include <netinet/ip.h> 98 #include <netinet/ip_icmp.h> 99 #include <netinet/ip_var.h> 100 #include <arpa/inet.h> 101 #include <ctype.h> 102 #include <netdb.h> 103 104 #ifdef IPSEC 105 #include <netinet6/ipsec.h> 106 #endif /*IPSEC*/ 107 108 #define FLOOD_INTVL 0.01 /* default flood output interval */ 109 #define MAXPACKET (IP_MAXPACKET-60-8) /* max packet size */ 110 111 #define F_VERBOSE 0x0001 112 #define F_QUIET 0x0002 /* minimize all output */ 113 #define F_SEMI_QUIET 0x0004 /* ignore our ICMP errors */ 114 #define F_FLOOD 0x0008 /* flood-ping */ 115 #define F_RECORD_ROUTE 0x0010 /* record route */ 116 #define F_SOURCE_ROUTE 0x0020 /* loose source route */ 117 #define F_PING_FILLED 0x0040 /* is buffer filled with user data? */ 118 #define F_PING_RANDOM 0x0080 /* use random data */ 119 #define F_NUMERIC 0x0100 /* do not do gethostbyaddr() calls */ 120 #define F_TIMING 0x0200 /* room for a timestamp */ 121 #define F_DF 0x0400 /* set IP DF bit */ 122 #define F_SOURCE_ADDR 0x0800 /* set source IP address/interface */ 123 #define F_ONCE 0x1000 /* exit(0) after receiving 1 reply */ 124 #define F_MCAST 0x2000 /* multicast target */ 125 #define F_MCAST_NOLOOP 0x4000 /* no multicast loopback */ 126 #define F_AUDIBLE 0x8000 /* audible output */ 127 #ifdef IPSEC 128 #ifdef IPSEC_POLICY_IPSEC 129 #define F_POLICY 0x10000 130 #else 131 #define F_AUTHHDR 0x10000 132 #define F_ENCRYPT 0x20000 133 #endif /*IPSEC_POLICY_IPSEC*/ 134 #endif /*IPSEC*/ 135 136 137 /* MAX_DUP_CHK is the number of bits in received table, the 138 * maximum number of received sequence numbers we can track to check 139 * for duplicates. 140 */ 141 #define MAX_DUP_CHK (8 * 2048) 142 u_char rcvd_tbl[MAX_DUP_CHK/8]; 143 int nrepeats = 0; 144 #define A(seq) rcvd_tbl[(seq/8)%sizeof(rcvd_tbl)] /* byte in array */ 145 #define B(seq) (1 << (seq & 0x07)) /* bit in byte */ 146 #define SET(seq) (A(seq) |= B(seq)) 147 #define CLR(seq) (A(seq) &= (~B(seq))) 148 #define TST(seq) (A(seq) & B(seq)) 149 150 struct tv32 { 151 int32_t tv32_sec; 152 int32_t tv32_usec; 153 }; 154 155 156 u_char *packet; 157 int packlen; 158 int pingflags = 0, options; 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 #ifdef SIGINFO 209 int reset_kerninfo; 210 #endif 211 212 int bufspace = IP_MAXPACKET; 213 214 struct timeval now, clear_cache, last_tx, next_tx, first_tx; 215 struct timeval last_rx, first_rx; 216 int lastrcvd = 1; /* last ping sent has been received */ 217 218 static struct timeval jiggle_time; 219 static int jiggle_cnt, total_jiggled, jiggle_direction = -1; 220 221 static void doit(void); 222 static void prefinish(int); 223 static void prtsig(int); 224 static void finish(int); 225 static void summary(int); 226 static void pinger(void); 227 static void fill(void); 228 static void rnd_fill(void); 229 static double diffsec(struct timeval *, struct timeval *); 230 static void timevaladd(struct timeval *, struct timeval *); 231 static void sec_to_timeval(const double, struct timeval *); 232 static double timeval_to_sec(const struct timeval *); 233 static void pr_pack(u_char *, int, struct sockaddr_in *); 234 static u_int16_t in_cksum(u_int16_t *, u_int); 235 static void pr_saddr(u_char *); 236 static char *pr_addr(struct in_addr *); 237 static void pr_iph(struct icmp *, int); 238 static void pr_retip(struct icmp *, int); 239 static int pr_icmph(struct icmp *, struct sockaddr_in *, int); 240 static void jiggle(int), jiggle_flush(int); 241 static void gethost(const char *, const char *, 242 struct sockaddr_in *, char *, int); 243 static void usage(void); 244 245 246 int 247 main(int argc, char *argv[]) 248 { 249 int c, i, on = 1, hostind = 0; 250 long l; 251 u_char ttl = 0; 252 u_long tos = 0; 253 char *p; 254 #ifdef SIGINFO 255 struct termios ts; 256 #endif 257 #ifdef IPSEC 258 #ifdef IPSEC_POLICY_IPSEC 259 char *policy_in = NULL; 260 char *policy_out = NULL; 261 #endif 262 #endif 263 264 265 if ((s = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 266 err(1, "Cannot create socket"); 267 if ((sloop = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 268 err(1, "Cannot create socket"); 269 270 if (setuid(getuid()) == -1) 271 err(1, "setuid"); 272 273 setprogname(argv[0]); 274 275 #ifndef IPSEC 276 #define IPSECOPT 277 #else 278 #ifdef IPSEC_POLICY_IPSEC 279 #define IPSECOPT "E:" 280 #else 281 #define IPSECOPT "AE" 282 #endif /*IPSEC_POLICY_IPSEC*/ 283 #endif 284 while ((c = getopt(argc, argv, 285 "ac:dDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 286 #undef IPSECOPT 287 switch (c) { 288 case 'a': 289 pingflags |= F_AUDIBLE; 290 break; 291 case 'c': 292 npackets = strtol(optarg, &p, 0); 293 if (*p != '\0' || npackets <= 0) 294 errx(1, "Bad/invalid number of packets"); 295 break; 296 case 'D': 297 pingflags |= F_DF; 298 break; 299 case 'd': 300 options |= SO_DEBUG; 301 break; 302 case 'f': 303 pingflags |= F_FLOOD; 304 break; 305 case 'h': 306 hostind = optind-1; 307 break; 308 case 'i': /* wait between sending packets */ 309 interval = strtod(optarg, &p); 310 if (*p != '\0' || interval <= 0) 311 errx(1, "Bad/invalid interval %s", optarg); 312 break; 313 case 'l': 314 preload = strtol(optarg, &p, 0); 315 if (*p != '\0' || preload < 0) 316 errx(1, "Bad/invalid preload value %s", 317 optarg); 318 break; 319 case 'n': 320 pingflags |= F_NUMERIC; 321 break; 322 case 'o': 323 pingflags |= F_ONCE; 324 break; 325 case 'p': /* fill buffer with user pattern */ 326 if (pingflags & F_PING_RANDOM) 327 errx(1, "Only one of -P and -p allowed"); 328 pingflags |= F_PING_FILLED; 329 fill_pat = optarg; 330 break; 331 case 'P': 332 if (pingflags & F_PING_FILLED) 333 errx(1, "Only one of -P and -p allowed"); 334 pingflags |= F_PING_RANDOM; 335 break; 336 case 'q': 337 pingflags |= F_QUIET; 338 break; 339 case 'Q': 340 pingflags |= F_SEMI_QUIET; 341 break; 342 case 'r': 343 options |= SO_DONTROUTE; 344 break; 345 case 's': /* size of packet to send */ 346 datalen = strtol(optarg, &p, 0); 347 if (*p != '\0' || datalen < 0) 348 errx(1, "Bad/invalid packet size %s", optarg); 349 if (datalen > MAXPACKET) 350 errx(1, "packet size is too large"); 351 break; 352 case 'v': 353 pingflags |= F_VERBOSE; 354 break; 355 case 'R': 356 pingflags |= F_RECORD_ROUTE; 357 break; 358 case 'L': 359 pingflags |= F_MCAST_NOLOOP; 360 break; 361 case 't': 362 tos = strtoul(optarg, &p, 0); 363 if (*p != '\0' || tos > 0xFF) 364 errx(1, "bad tos value: %s", optarg); 365 break; 366 case 'T': 367 l = strtol(optarg, &p, 0); 368 if (*p != '\0' || l > 255 || l <= 0) 369 errx(1, "ttl out of range"); 370 ttl = (u_char)l; /* cannot check >255 otherwise */ 371 break; 372 case 'I': 373 pingflags |= F_SOURCE_ADDR; 374 gethost("-I", optarg, &src_addr, 0, 0); 375 break; 376 case 'g': 377 pingflags |= F_SOURCE_ROUTE; 378 gethost("-g", optarg, &send_addr, 0, 0); 379 break; 380 case 'w': 381 maxwait = strtod(optarg, &p); 382 if (*p != '\0' || maxwait <= 0) 383 errx(1, "Bad/invalid maxwait time %s", optarg); 384 break; 385 #ifdef IPSEC 386 #ifdef IPSEC_POLICY_IPSEC 387 case 'E': 388 pingflags |= F_POLICY; 389 if (!strncmp("in", optarg, 2)) { 390 policy_in = strdup(optarg); 391 if (!policy_in) 392 err(1, "strdup"); 393 } else if (!strncmp("out", optarg, 3)) { 394 policy_out = strdup(optarg); 395 if (!policy_out) 396 err(1, "strdup"); 397 } else 398 errx(1, "invalid security policy"); 399 break; 400 #else 401 case 'A': 402 pingflags |= F_AUTHHDR; 403 break; 404 case 'E': 405 pingflags |= F_ENCRYPT; 406 break; 407 #endif /*IPSEC_POLICY_IPSEC*/ 408 #endif /*IPSEC*/ 409 default: 410 usage(); 411 break; 412 } 413 } 414 415 if (interval == 0) 416 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 417 #ifndef sgi 418 if (pingflags & F_FLOOD && getuid()) 419 errx(1, "Must be superuser to use -f"); 420 if (interval < 1.0 && getuid()) 421 errx(1, "Must be superuser to use < 1 sec ping interval"); 422 if (preload > 0 && getuid()) 423 errx(1, "Must be superuser to use -l"); 424 #endif 425 sec_to_timeval(interval, &interval_tv); 426 427 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 428 warnx("Sorry, no audible output for flood pings"); 429 430 if (npackets != 0) { 431 npackets += preload; 432 } else { 433 npackets = INT_MAX; 434 } 435 436 if (hostind == 0) { 437 if (optind != argc-1) 438 usage(); 439 else 440 hostind = optind; 441 } 442 else if (hostind >= argc - 1) 443 usage(); 444 445 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 446 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 447 pingflags |= F_MCAST; 448 if (!(pingflags & F_SOURCE_ROUTE)) 449 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 450 451 loc_addr.sin_family = AF_INET; 452 loc_addr.sin_len = sizeof(struct sockaddr_in); 453 loc_addr.sin_addr.s_addr = htonl((127<<24)+1); 454 455 if (datalen >= PHDR_LEN) /* can we time them? */ 456 pingflags |= F_TIMING; 457 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 458 if ((packet = (u_char *)malloc(packlen)) == NULL) 459 err(1, "Out of memory"); 460 461 if (pingflags & F_PING_FILLED) { 462 fill(); 463 } else if (pingflags & F_PING_RANDOM) { 464 rnd_fill(); 465 } else { 466 for (i = PHDR_LEN; i < datalen; i++) 467 opack_icmp.icmp_data[i] = i; 468 } 469 470 ident = arc4random() & 0xFFFF; 471 472 if (options & SO_DEBUG) { 473 if (setsockopt(s, SOL_SOCKET, SO_DEBUG, 474 (char *)&on, sizeof(on)) == -1) 475 warn("Can't turn on socket debugging"); 476 } 477 if (options & SO_DONTROUTE) { 478 if (setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 479 (char *)&on, sizeof(on)) == -1) 480 warn("SO_DONTROUTE"); 481 } 482 483 if (options & SO_DEBUG) { 484 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 485 (char *)&on, sizeof(on)) == -1) 486 warn("Can't turn on socket debugging"); 487 } 488 if (options & SO_DONTROUTE) { 489 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 490 (char *)&on, sizeof(on)) == -1) 491 warn("SO_DONTROUTE"); 492 } 493 494 if (pingflags & F_SOURCE_ROUTE) { 495 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 496 optspace[IPOPT_OLEN] = optlen = 7; 497 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 498 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 499 sizeof(whereto.sin_addr)); 500 optspace[optlen++] = IPOPT_NOP; 501 } 502 if (pingflags & F_RECORD_ROUTE) { 503 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 504 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 505 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 506 optlen = MAX_IPOPTLEN; 507 } 508 /* this leaves opack_ip 0(mod 4) aligned */ 509 opack_ip = (struct ip *)((char *)&out_pack.o_ip 510 + sizeof(out_pack.o_opt) 511 - optlen); 512 (void) memcpy(opack_ip + 1, optspace, optlen); 513 514 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 515 err(1, "Can't set special IP header"); 516 517 opack_ip->ip_v = IPVERSION; 518 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 519 opack_ip->ip_tos = tos; 520 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 521 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 522 opack_ip->ip_p = IPPROTO_ICMP; 523 opack_ip->ip_src = src_addr.sin_addr; 524 opack_ip->ip_dst = send_addr.sin_addr; 525 526 if (pingflags & F_MCAST) { 527 if (pingflags & F_MCAST_NOLOOP) { 528 u_char loop = 0; 529 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 530 (char *) &loop, 1) < 0) 531 err(1, "Can't disable multicast loopback"); 532 } 533 534 if (ttl != 0 535 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 536 (char *) &ttl, 1) < 0) 537 err(1, "Can't set multicast time-to-live"); 538 539 if ((pingflags & F_SOURCE_ADDR) 540 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 541 (char *) &src_addr.sin_addr, 542 sizeof(src_addr.sin_addr)) < 0) 543 err(1, "Can't set multicast source interface"); 544 545 } else if (pingflags & F_SOURCE_ADDR) { 546 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 547 (char *) &src_addr.sin_addr, 548 sizeof(src_addr.sin_addr)) < 0) 549 err(1, "Can't set source interface/address"); 550 } 551 #ifdef IPSEC 552 #ifdef IPSEC_POLICY_IPSEC 553 { 554 char *buf; 555 if (pingflags & F_POLICY) { 556 if (policy_in != NULL) { 557 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 558 if (buf == NULL) 559 errx(1, "%s", ipsec_strerror()); 560 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 561 buf, ipsec_get_policylen(buf)) < 0) { 562 err(1, "ipsec policy cannot be configured"); 563 } 564 free(buf); 565 } 566 if (policy_out != NULL) { 567 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 568 if (buf == NULL) 569 errx(1, "%s", ipsec_strerror()); 570 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 571 buf, ipsec_get_policylen(buf)) < 0) { 572 err(1, "ipsec policy cannot be configured"); 573 } 574 free(buf); 575 } 576 } 577 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 578 if (buf == NULL) 579 errx(1, "%s", ipsec_strerror()); 580 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 581 buf, ipsec_get_policylen(buf)) < 0) { 582 #if 0 583 warnx("ipsec is not configured"); 584 #else 585 /* ignore it, should be okay */ 586 #endif 587 } 588 free(buf); 589 } 590 #else 591 { 592 int optval; 593 if (pingflags & F_AUTHHDR) { 594 optval = IPSEC_LEVEL_REQUIRE; 595 #ifdef IP_AUTH_TRANS_LEVEL 596 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 597 (char *)&optval, sizeof(optval)); 598 #else 599 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 600 (char *)&optval, sizeof(optval)); 601 #endif 602 } 603 if (pingflags & F_ENCRYPT) { 604 optval = IPSEC_LEVEL_REQUIRE; 605 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 606 (char *)&optval, sizeof(optval)); 607 } 608 optval = IPSEC_LEVEL_BYPASS; 609 #ifdef IP_AUTH_TRANS_LEVEL 610 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 611 (char *)&optval, sizeof(optval)); 612 #else 613 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 614 (char *)&optval, sizeof(optval)); 615 #endif 616 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 617 (char *)&optval, sizeof(optval)); 618 } 619 #endif /*IPSEC_POLICY_IPSEC*/ 620 #endif /*IPSEC*/ 621 622 (void)printf("PING %s (%s): %d data bytes\n", hostname, 623 inet_ntoa(whereto.sin_addr), datalen); 624 625 /* When pinging the broadcast address, you can get a lot 626 * of answers. Doing something so evil is useful if you 627 * are trying to stress the ethernet, or just want to 628 * fill the arp cache to get some stuff for /etc/ethers. 629 */ 630 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 631 (char*)&bufspace, sizeof(bufspace))) { 632 if ((bufspace -= 4096) <= 0) 633 err(1, "Cannot set the receive buffer size"); 634 } 635 636 /* make it possible to send giant probes, but do not worry now 637 * if it fails, since we probably won't send giant probes. 638 */ 639 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 640 (char*)&bufspace, sizeof(bufspace)); 641 642 (void)signal(SIGINT, prefinish); 643 644 #if defined(SIGINFO) && defined(NOKERNINFO) 645 if (tcgetattr (0, &ts) != -1) { 646 reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 647 ts.c_lflag |= NOKERNINFO; 648 tcsetattr (STDIN_FILENO, TCSANOW, &ts); 649 } 650 #endif 651 652 #ifdef SIGINFO 653 (void)signal(SIGINFO, prtsig); 654 #else 655 (void)signal(SIGQUIT, prtsig); 656 #endif 657 (void)signal(SIGCONT, prtsig); 658 659 /* fire off them quickies */ 660 for (i = 0; i < preload; i++) { 661 (void)gettimeofday(&now, 0); 662 pinger(); 663 } 664 665 doit(); 666 return 0; 667 } 668 669 670 static void 671 doit(void) 672 { 673 int cc; 674 struct sockaddr_in from; 675 int fromlen; 676 double sec, last, d_last; 677 struct pollfd fdmaskp[1]; 678 679 (void)gettimeofday(&clear_cache,0); 680 if (maxwait != 0) { 681 last = timeval_to_sec(&clear_cache) + maxwait; 682 d_last = 0; 683 } else { 684 last = 0; 685 d_last = 365*24*60*60; 686 } 687 688 do { 689 (void)gettimeofday(&now,0); 690 691 if (last != 0) 692 d_last = last - timeval_to_sec(&now); 693 694 if (ntransmitted < npackets && d_last > 0) { 695 /* send if within 100 usec or late for next packet */ 696 sec = diffsec(&next_tx,&now); 697 if (sec <= 0.0001 || 698 (lastrcvd && (pingflags & F_FLOOD))) { 699 pinger(); 700 sec = diffsec(&next_tx,&now); 701 } 702 if (sec < 0.0) 703 sec = 0.0; 704 if (d_last < sec) 705 sec = d_last; 706 707 } else { 708 /* For the last response, wait twice as long as the 709 * worst case seen, or 10 times as long as the 710 * maximum interpacket interval, whichever is longer. 711 */ 712 sec = MAX(2 * tmax, 10 * interval) - 713 diffsec(&now, &last_tx); 714 if (d_last < sec) 715 sec = d_last; 716 if (sec <= 0) 717 break; 718 } 719 720 721 fdmaskp[0].fd = s; 722 fdmaskp[0].events = POLLIN; 723 cc = poll(fdmaskp, 1, (int)(sec * 1000)); 724 if (cc <= 0) { 725 if (cc < 0) { 726 if (errno == EINTR) 727 continue; 728 jiggle_flush(1); 729 err(1, "poll"); 730 } 731 continue; 732 } 733 734 fromlen = sizeof(from); 735 cc = recvfrom(s, (char *) packet, packlen, 736 0, (struct sockaddr *)&from, 737 &fromlen); 738 if (cc < 0) { 739 if (errno != EINTR) { 740 jiggle_flush(1); 741 warn("recvfrom"); 742 (void)fflush(stderr); 743 } 744 continue; 745 } 746 (void)gettimeofday(&now, 0); 747 pr_pack(packet, cc, &from); 748 749 } while (nreceived < npackets 750 && (nreceived == 0 || !(pingflags & F_ONCE))); 751 752 finish(0); 753 } 754 755 756 static void 757 jiggle_flush(int nl) /* new line if there are dots */ 758 { 759 int serrno = errno; 760 761 if (jiggle_cnt > 0) { 762 total_jiggled += jiggle_cnt; 763 jiggle_direction = 1; 764 do { 765 (void)putchar('.'); 766 } while (--jiggle_cnt > 0); 767 768 } else if (jiggle_cnt < 0) { 769 total_jiggled -= jiggle_cnt; 770 jiggle_direction = -1; 771 do { 772 (void)putchar('\b'); 773 } while (++jiggle_cnt < 0); 774 } 775 776 if (nl) { 777 if (total_jiggled != 0) 778 (void)putchar('\n'); 779 total_jiggled = 0; 780 jiggle_direction = -1; 781 } 782 783 (void)fflush(stdout); 784 (void)fflush(stderr); 785 jiggle_time = now; 786 errno = serrno; 787 } 788 789 790 /* jiggle the cursor for flood-ping 791 */ 792 static void 793 jiggle(int delta) 794 { 795 double dt; 796 797 if (pingflags & F_QUIET) 798 return; 799 800 /* do not back up into messages */ 801 if (total_jiggled+jiggle_cnt+delta < 0) 802 return; 803 804 jiggle_cnt += delta; 805 806 /* flush the FLOOD dots when things are quiet 807 * or occassionally to make the cursor jiggle. 808 */ 809 dt = diffsec(&last_tx, &jiggle_time); 810 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 811 jiggle_flush(0); 812 } 813 814 815 /* 816 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 817 * will be added on by the kernel. The ID field is our UNIX process ID, 818 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 819 * of the data portion are used to hold a UNIX "timeval" struct in VAX 820 * byte-order, to compute the round-trip time. 821 */ 822 static void 823 pinger(void) 824 { 825 struct tv32 tv32; 826 int i, cc, sw; 827 828 opack_icmp.icmp_code = 0; 829 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 830 831 /* clear the cached route in the kernel after an ICMP 832 * response such as a Redirect is seen to stop causing 833 * more such packets. Also clear the cached route 834 * periodically in case of routing changes that make 835 * black holes come and go. 836 */ 837 if (clear_cache.tv_sec != now.tv_sec) { 838 opack_icmp.icmp_type = ICMP_ECHOREPLY; 839 opack_icmp.icmp_id = ~ident; 840 opack_icmp.icmp_cksum = 0; 841 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 842 PHDR_LEN); 843 sw = 0; 844 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 845 (char *)&sw,sizeof(sw)) < 0) 846 err(1, "Can't turn off special IP header"); 847 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 848 (struct sockaddr *)&loc_addr, 849 sizeof(struct sockaddr_in)) < 0) { 850 /* 851 * XXX: we only report this as a warning in verbose 852 * mode because people get confused when they see 853 * this error when they are running in single user 854 * mode and they have not configured lo0 855 */ 856 if (pingflags & F_VERBOSE) 857 warn("failed to clear cached route"); 858 } 859 sw = 1; 860 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 861 (char *)&sw, sizeof(sw)) < 0) 862 err(1, "Can't set special IP header"); 863 864 (void)gettimeofday(&clear_cache,0); 865 } 866 867 opack_icmp.icmp_type = ICMP_ECHO; 868 opack_icmp.icmp_id = ident; 869 tv32.tv32_sec = htonl(now.tv_sec); 870 tv32.tv32_usec = htonl(now.tv_usec); 871 if (pingflags & F_TIMING) 872 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 873 cc = datalen + PHDR_LEN; 874 opack_icmp.icmp_cksum = 0; 875 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 876 877 cc += opack_ip->ip_hl<<2; 878 opack_ip->ip_len = cc; 879 i = sendto(s, (char *) opack_ip, cc, 0, 880 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 881 if (i != cc) { 882 jiggle_flush(1); 883 if (i < 0) 884 warn("sendto"); 885 else 886 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 887 (void)fflush(stderr); 888 } 889 lastrcvd = 0; 890 891 CLR(ntransmitted); 892 ntransmitted++; 893 894 last_tx = now; 895 if (next_tx.tv_sec == 0) { 896 first_tx = now; 897 next_tx = now; 898 } 899 900 /* Transmit regularly, at always the same microsecond in the 901 * second when going at one packet per second. 902 * If we are at most 100 ms behind, send extras to get caught up. 903 * Otherwise, skip packets we were too slow to send. 904 */ 905 if (diffsec(&next_tx, &now) <= interval) { 906 do { 907 timevaladd(&next_tx, &interval_tv); 908 } while (diffsec(&next_tx, &now) < -0.1); 909 } 910 911 if (pingflags & F_FLOOD) 912 jiggle(1); 913 914 /* While the packet is going out, ready buffer for the next 915 * packet. Use a fast but not very good random number generator. 916 */ 917 if (pingflags & F_PING_RANDOM) 918 rnd_fill(); 919 } 920 921 922 static void 923 pr_pack_sub(int cc, 924 char *addr, 925 int seqno, 926 int dupflag, 927 int ttl, 928 double triptime) 929 { 930 jiggle_flush(1); 931 932 if (pingflags & F_FLOOD) 933 return; 934 935 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 936 if (dupflag) 937 (void)printf(" DUP!"); 938 (void)printf(" ttl=%d", ttl); 939 if (pingflags & F_TIMING) 940 (void)printf(" time=%.3f ms", triptime*1000.0); 941 942 /* 943 * Send beep to stderr, since that's more likely than stdout 944 * to go to a terminal.. 945 */ 946 if (pingflags & F_AUDIBLE && !dupflag) 947 (void)fprintf(stderr,"\a"); 948 } 949 950 951 /* 952 * Print out the packet, if it came from us. This logic is necessary 953 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 954 * which arrive ('tis only fair). This permits multiple copies of this 955 * program to be run without having intermingled output (or statistics!). 956 */ 957 static void 958 pr_pack(u_char *buf, 959 int tot_len, 960 struct sockaddr_in *from) 961 { 962 struct ip *ip; 963 struct icmp *icp; 964 int i, j, net_len; 965 u_char *cp; 966 static int old_rrlen; 967 static char old_rr[MAX_IPOPTLEN]; 968 int hlen, dupflag = 0, dumped; 969 double triptime = 0.0; 970 #define PR_PACK_SUB() {if (!dumped) { \ 971 dumped = 1; \ 972 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 973 ntohs((u_int16_t)icp->icmp_seq), \ 974 dupflag, ip->ip_ttl, triptime);}} 975 976 /* Check the IP header */ 977 ip = (struct ip *) buf; 978 hlen = ip->ip_hl << 2; 979 if (tot_len < hlen + ICMP_MINLEN) { 980 if (pingflags & F_VERBOSE) { 981 jiggle_flush(1); 982 (void)printf("packet too short (%d bytes) from %s\n", 983 tot_len, inet_ntoa(from->sin_addr)); 984 } 985 return; 986 } 987 988 /* Now the ICMP part */ 989 dumped = 0; 990 net_len = tot_len - hlen; 991 icp = (struct icmp *)(buf + hlen); 992 if (icp->icmp_type == ICMP_ECHOREPLY 993 && icp->icmp_id == ident) { 994 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 995 lastrcvd = 1; 996 last_rx = now; 997 if (first_rx.tv_sec == 0) 998 first_rx = last_rx; 999 nreceived++; 1000 if (pingflags & F_TIMING) { 1001 struct timeval tv; 1002 struct tv32 tv32; 1003 1004 (void) memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 1005 tv.tv_sec = ntohl(tv32.tv32_sec); 1006 tv.tv_usec = ntohl(tv32.tv32_usec); 1007 triptime = diffsec(&last_rx, &tv); 1008 tsum += triptime; 1009 tsumsq += triptime * triptime; 1010 if (triptime < tmin) 1011 tmin = triptime; 1012 if (triptime > tmax) 1013 tmax = triptime; 1014 } 1015 1016 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1017 nrepeats++, nreceived--; 1018 dupflag=1; 1019 } else { 1020 SET(ntohs((u_int16_t)icp->icmp_seq)); 1021 } 1022 1023 if (tot_len != opack_ip->ip_len) { 1024 PR_PACK_SUB(); 1025 (void)printf("\nwrong total length %d instead of %d", 1026 tot_len, opack_ip->ip_len); 1027 } 1028 1029 if (!dupflag) { 1030 static u_int16_t last_seqno = 0xffff; 1031 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1032 u_int16_t gap = seqno - (last_seqno + 1); 1033 if (gap > 0 && gap < 0x8000 && 1034 (pingflags & F_VERBOSE)) { 1035 (void)printf("[*** sequence gap of %u " 1036 "packets from %u ... %u ***]\n", gap, 1037 (u_int16_t) (last_seqno + 1), 1038 (u_int16_t) (seqno - 1)); 1039 if (pingflags & F_QUIET) 1040 summary(0); 1041 } 1042 1043 if (gap < 0x8000) 1044 last_seqno = seqno; 1045 } 1046 1047 if (pingflags & F_QUIET) 1048 return; 1049 1050 if (!(pingflags & F_FLOOD)) 1051 PR_PACK_SUB(); 1052 1053 /* check the data */ 1054 if (datalen > PHDR_LEN 1055 && !(pingflags & F_PING_RANDOM) 1056 && memcmp(&icp->icmp_data[PHDR_LEN], 1057 &opack_icmp.icmp_data[PHDR_LEN], 1058 datalen-PHDR_LEN)) { 1059 for (i=PHDR_LEN; i<datalen; i++) { 1060 if (icp->icmp_data[i] != 1061 opack_icmp.icmp_data[i]) 1062 break; 1063 } 1064 PR_PACK_SUB(); 1065 (void)printf("\nwrong data byte #%d should have been" 1066 " %#x but was %#x", i, 1067 (u_char)opack_icmp.icmp_data[i], 1068 (u_char)icp->icmp_data[i]); 1069 for (i=PHDR_LEN; i<datalen; i++) { 1070 if ((i%16) == PHDR_LEN) 1071 (void)printf("\n\t"); 1072 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1073 } 1074 } 1075 1076 } else { 1077 if (!pr_icmph(icp, from, net_len)) 1078 return; 1079 dumped = 2; 1080 } 1081 1082 /* Display any IP options */ 1083 cp = buf + sizeof(struct ip); 1084 while (hlen > (int)sizeof(struct ip)) { 1085 switch (*cp) { 1086 case IPOPT_EOL: 1087 hlen = 0; 1088 break; 1089 case IPOPT_LSRR: 1090 hlen -= 2; 1091 j = *++cp; 1092 ++cp; 1093 j -= IPOPT_MINOFF; 1094 if (j <= 0) 1095 continue; 1096 if (dumped <= 1) { 1097 j = ((j+3)/4)*4; 1098 hlen -= j; 1099 cp += j; 1100 break; 1101 } 1102 PR_PACK_SUB(); 1103 (void)printf("\nLSRR: "); 1104 for (;;) { 1105 pr_saddr(cp); 1106 cp += 4; 1107 hlen -= 4; 1108 j -= 4; 1109 if (j <= 0) 1110 break; 1111 (void)putchar('\n'); 1112 } 1113 break; 1114 case IPOPT_RR: 1115 j = *++cp; /* get length */ 1116 i = *++cp; /* and pointer */ 1117 hlen -= 2; 1118 if (i > j) 1119 i = j; 1120 i -= IPOPT_MINOFF; 1121 if (i <= 0) 1122 continue; 1123 if (dumped <= 1) { 1124 if (i == old_rrlen 1125 && !memcmp(cp, old_rr, i)) { 1126 if (dumped) 1127 (void)printf("\t(same route)"); 1128 j = ((i+3)/4)*4; 1129 hlen -= j; 1130 cp += j; 1131 break; 1132 } 1133 old_rrlen = i; 1134 (void) memcpy(old_rr, cp, i); 1135 } 1136 if (!dumped) { 1137 jiggle_flush(1); 1138 (void)printf("RR: "); 1139 dumped = 1; 1140 } else { 1141 (void)printf("\nRR: "); 1142 } 1143 for (;;) { 1144 pr_saddr(cp); 1145 cp += 4; 1146 hlen -= 4; 1147 i -= 4; 1148 if (i <= 0) 1149 break; 1150 (void)putchar('\n'); 1151 } 1152 break; 1153 case IPOPT_NOP: 1154 if (dumped <= 1) 1155 break; 1156 PR_PACK_SUB(); 1157 (void)printf("\nNOP"); 1158 break; 1159 #ifdef sgi 1160 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1161 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1162 case IPOPT_CIPSO: /* Commercial IPSO */ 1163 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1164 i = (unsigned)cp[1]; 1165 hlen -= i - 1; 1166 PR_PACK_SUB(); 1167 (void)printf("\nSEC:"); 1168 while (i--) { 1169 (void)printf(" %02x", *cp++); 1170 } 1171 cp--; 1172 break; 1173 } 1174 #endif 1175 default: 1176 PR_PACK_SUB(); 1177 (void)printf("\nunknown option 0x%x", *cp); 1178 break; 1179 } 1180 hlen--; 1181 cp++; 1182 } 1183 1184 if (dumped) { 1185 (void)putchar('\n'); 1186 (void)fflush(stdout); 1187 } else { 1188 jiggle(-1); 1189 } 1190 } 1191 1192 1193 /* Compute the IP checksum 1194 * This assumes the packet is less than 32K long. 1195 */ 1196 static u_int16_t 1197 in_cksum(u_int16_t *p, u_int len) 1198 { 1199 u_int32_t sum = 0; 1200 int nwords = len >> 1; 1201 1202 while (nwords-- != 0) 1203 sum += *p++; 1204 1205 if (len & 1) { 1206 union { 1207 u_int16_t w; 1208 u_int8_t c[2]; 1209 } u; 1210 u.c[0] = *(u_char *)p; 1211 u.c[1] = 0; 1212 sum += u.w; 1213 } 1214 1215 /* end-around-carry */ 1216 sum = (sum >> 16) + (sum & 0xffff); 1217 sum += (sum >> 16); 1218 return (~sum); 1219 } 1220 1221 1222 /* 1223 * compute the difference of two timevals in seconds 1224 */ 1225 static double 1226 diffsec(struct timeval *timenow, 1227 struct timeval *then) 1228 { 1229 return ((timenow->tv_sec - then->tv_sec)*1.0 1230 + (timenow->tv_usec - then->tv_usec)/1000000.0); 1231 } 1232 1233 1234 static void 1235 timevaladd(struct timeval *t1, 1236 struct timeval *t2) 1237 { 1238 1239 t1->tv_sec += t2->tv_sec; 1240 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1241 t1->tv_sec++; 1242 t1->tv_usec -= 1000000; 1243 } 1244 } 1245 1246 1247 static void 1248 sec_to_timeval(const double sec, struct timeval *tp) 1249 { 1250 tp->tv_sec = sec; 1251 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1252 } 1253 1254 1255 static double 1256 timeval_to_sec(const struct timeval *tp) 1257 { 1258 return tp->tv_sec + tp->tv_usec / 1000000.0; 1259 } 1260 1261 1262 /* 1263 * Print statistics. 1264 * Heavily buffered STDIO is used here, so that all the statistics 1265 * will be written with 1 sys-write call. This is nice when more 1266 * than one copy of the program is running on a terminal; it prevents 1267 * the statistics output from becomming intermingled. 1268 */ 1269 static void 1270 summary(int header) 1271 { 1272 jiggle_flush(1); 1273 1274 if (header) 1275 (void)printf("\n----%s PING Statistics----\n", hostname); 1276 (void)printf("%d packets transmitted, ", ntransmitted); 1277 (void)printf("%d packets received, ", nreceived); 1278 if (nrepeats) 1279 (void)printf("+%d duplicates, ", nrepeats); 1280 if (ntransmitted) { 1281 if (nreceived > ntransmitted) 1282 (void)printf("-- somebody's duplicating packets!"); 1283 else 1284 (void)printf("%.1f%% packet loss", 1285 (((ntransmitted-nreceived)*100.0) / 1286 ntransmitted)); 1287 } 1288 (void)printf("\n"); 1289 if (nreceived && (pingflags & F_TIMING)) { 1290 double n = nreceived + nrepeats; 1291 double avg = (tsum / n); 1292 double variance = 0.0; 1293 if (n>1) 1294 variance = (tsumsq - n*avg*avg) /(n-1); 1295 1296 printf("round-trip min/avg/max/stddev = " 1297 "%.3f/%.3f/%.3f/%.3f ms\n", 1298 tmin * 1000.0, avg * 1000.0, 1299 tmax * 1000.0, sqrt(variance) * 1000.0); 1300 if (pingflags & F_FLOOD) { 1301 double r = diffsec(&last_rx, &first_rx); 1302 double t = diffsec(&last_tx, &first_tx); 1303 if (r == 0) 1304 r = 0.0001; 1305 if (t == 0) 1306 t = 0.0001; 1307 (void)printf(" %.1f packets/sec sent, " 1308 " %.1f packets/sec received\n", 1309 ntransmitted/t, nreceived/r); 1310 } 1311 } 1312 } 1313 1314 1315 /* 1316 * Print statistics when SIGINFO is received. 1317 */ 1318 /* ARGSUSED */ 1319 static void 1320 prtsig(int dummy) 1321 { 1322 summary(0); 1323 #ifdef SIGINFO 1324 (void)signal(SIGINFO, prtsig); 1325 #else 1326 (void)signal(SIGQUIT, prtsig); 1327 #endif 1328 } 1329 1330 1331 /* 1332 * On the first SIGINT, allow any outstanding packets to dribble in 1333 */ 1334 static void 1335 prefinish(int dummy) 1336 { 1337 if (lastrcvd /* quit now if caught up */ 1338 || nreceived == 0) /* or if remote is dead */ 1339 finish(0); 1340 1341 (void)signal(dummy, finish); /* do this only the 1st time */ 1342 1343 if (npackets > ntransmitted) /* let the normal limit work */ 1344 npackets = ntransmitted; 1345 } 1346 1347 1348 /* 1349 * Print statistics and give up. 1350 */ 1351 /* ARGSUSED */ 1352 static void 1353 finish(int dummy) 1354 { 1355 #if defined(SIGINFO) && defined(NOKERNINFO) 1356 struct termios ts; 1357 1358 if (reset_kerninfo && tcgetattr (0, &ts) != -1) { 1359 ts.c_lflag &= ~NOKERNINFO; 1360 tcsetattr (STDIN_FILENO, TCSANOW, &ts); 1361 } 1362 (void)signal(SIGINFO, SIG_IGN); 1363 #else 1364 (void)signal(SIGQUIT, SIG_DFL); 1365 #endif 1366 1367 summary(1); 1368 exit(nreceived > 0 ? 0 : 2); 1369 } 1370 1371 1372 static int /* 0=do not print it */ 1373 ck_pr_icmph(struct icmp *icp, 1374 struct sockaddr_in *from, 1375 int cc, 1376 int override) /* 1=override VERBOSE if interesting */ 1377 { 1378 int hlen; 1379 struct ip ipb, *ip = &ipb; 1380 struct icmp icp2b, *icp2 = &icp2b; 1381 int res; 1382 1383 if (pingflags & F_VERBOSE) { 1384 res = 1; 1385 jiggle_flush(1); 1386 } else { 1387 res = 0; 1388 } 1389 1390 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1391 hlen = ip->ip_hl << 2; 1392 if (ip->ip_p == IPPROTO_ICMP 1393 && hlen + 6 <= cc) { 1394 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1395 if (icp2->icmp_id == ident) { 1396 /* remember to clear route cached in kernel 1397 * if this non-Echo-Reply ICMP message was for one 1398 * of our packets. 1399 */ 1400 clear_cache.tv_sec = 0; 1401 1402 if (!res && override 1403 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1404 jiggle_flush(1); 1405 (void)printf("%d bytes from %s: ", 1406 cc, pr_addr(&from->sin_addr)); 1407 res = 1; 1408 } 1409 } 1410 } 1411 1412 return res; 1413 } 1414 1415 1416 /* 1417 * Print a descriptive string about an ICMP header other than an echo reply. 1418 */ 1419 static int /* 0=printed nothing */ 1420 pr_icmph(struct icmp *icp, 1421 struct sockaddr_in *from, 1422 int cc) 1423 { 1424 switch (icp->icmp_type ) { 1425 case ICMP_UNREACH: 1426 if (!ck_pr_icmph(icp, from, cc, 1)) 1427 return 0; 1428 switch (icp->icmp_code) { 1429 case ICMP_UNREACH_NET: 1430 (void)printf("Destination Net Unreachable"); 1431 break; 1432 case ICMP_UNREACH_HOST: 1433 (void)printf("Destination Host Unreachable"); 1434 break; 1435 case ICMP_UNREACH_PROTOCOL: 1436 (void)printf("Destination Protocol Unreachable"); 1437 break; 1438 case ICMP_UNREACH_PORT: 1439 (void)printf("Destination Port Unreachable"); 1440 break; 1441 case ICMP_UNREACH_NEEDFRAG: 1442 (void)printf("frag needed and DF set. Next MTU=%d", 1443 ntohs(icp->icmp_nextmtu)); 1444 break; 1445 case ICMP_UNREACH_SRCFAIL: 1446 (void)printf("Source Route Failed"); 1447 break; 1448 case ICMP_UNREACH_NET_UNKNOWN: 1449 (void)printf("Unreachable unknown net"); 1450 break; 1451 case ICMP_UNREACH_HOST_UNKNOWN: 1452 (void)printf("Unreachable unknown host"); 1453 break; 1454 case ICMP_UNREACH_ISOLATED: 1455 (void)printf("Unreachable host isolated"); 1456 break; 1457 case ICMP_UNREACH_NET_PROHIB: 1458 (void)printf("Net prohibited access"); 1459 break; 1460 case ICMP_UNREACH_HOST_PROHIB: 1461 (void)printf("Host prohibited access"); 1462 break; 1463 case ICMP_UNREACH_TOSNET: 1464 (void)printf("Bad TOS for net"); 1465 break; 1466 case ICMP_UNREACH_TOSHOST: 1467 (void)printf("Bad TOS for host"); 1468 break; 1469 case 13: 1470 (void)printf("Communication prohibited"); 1471 break; 1472 case 14: 1473 (void)printf("Host precedence violation"); 1474 break; 1475 case 15: 1476 (void)printf("Precedence cutoff"); 1477 break; 1478 default: 1479 (void)printf("Bad Destination Unreachable Code: %d", 1480 icp->icmp_code); 1481 break; 1482 } 1483 /* Print returned IP header information */ 1484 pr_retip(icp, cc); 1485 break; 1486 1487 case ICMP_SOURCEQUENCH: 1488 if (!ck_pr_icmph(icp, from, cc, 1)) 1489 return 0; 1490 (void)printf("Source Quench"); 1491 pr_retip(icp, cc); 1492 break; 1493 1494 case ICMP_REDIRECT: 1495 if (!ck_pr_icmph(icp, from, cc, 1)) 1496 return 0; 1497 switch (icp->icmp_code) { 1498 case ICMP_REDIRECT_NET: 1499 (void)printf("Redirect Network"); 1500 break; 1501 case ICMP_REDIRECT_HOST: 1502 (void)printf("Redirect Host"); 1503 break; 1504 case ICMP_REDIRECT_TOSNET: 1505 (void)printf("Redirect Type of Service and Network"); 1506 break; 1507 case ICMP_REDIRECT_TOSHOST: 1508 (void)printf("Redirect Type of Service and Host"); 1509 break; 1510 default: 1511 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1512 break; 1513 } 1514 (void)printf(" New router addr: %s", 1515 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1516 pr_retip(icp, cc); 1517 break; 1518 1519 case ICMP_ECHO: 1520 if (!ck_pr_icmph(icp, from, cc, 0)) 1521 return 0; 1522 (void)printf("Echo Request: ID=%d seq=%d", 1523 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1524 break; 1525 1526 case ICMP_ECHOREPLY: 1527 /* displaying other's pings is too noisey */ 1528 #if 0 1529 if (!ck_pr_icmph(icp, from, cc, 0)) 1530 return 0; 1531 (void)printf("Echo Reply: ID=%d seq=%d", 1532 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1533 break; 1534 #else 1535 return 0; 1536 #endif 1537 1538 case ICMP_ROUTERADVERT: 1539 if (!ck_pr_icmph(icp, from, cc, 0)) 1540 return 0; 1541 (void)printf("Router Discovery Advert"); 1542 break; 1543 1544 case ICMP_ROUTERSOLICIT: 1545 if (!ck_pr_icmph(icp, from, cc, 0)) 1546 return 0; 1547 (void)printf("Router Discovery Solicit"); 1548 break; 1549 1550 case ICMP_TIMXCEED: 1551 if (!ck_pr_icmph(icp, from, cc, 1)) 1552 return 0; 1553 switch (icp->icmp_code ) { 1554 case ICMP_TIMXCEED_INTRANS: 1555 (void)printf("Time To Live exceeded"); 1556 break; 1557 case ICMP_TIMXCEED_REASS: 1558 (void)printf("Frag reassembly time exceeded"); 1559 break; 1560 default: 1561 (void)printf("Time exceeded, Bad Code: %d", 1562 icp->icmp_code); 1563 break; 1564 } 1565 pr_retip(icp, cc); 1566 break; 1567 1568 case ICMP_PARAMPROB: 1569 if (!ck_pr_icmph(icp, from, cc, 1)) 1570 return 0; 1571 (void)printf("Parameter problem: pointer = 0x%02x", 1572 icp->icmp_hun.ih_pptr); 1573 pr_retip(icp, cc); 1574 break; 1575 1576 case ICMP_TSTAMP: 1577 if (!ck_pr_icmph(icp, from, cc, 0)) 1578 return 0; 1579 (void)printf("Timestamp"); 1580 break; 1581 1582 case ICMP_TSTAMPREPLY: 1583 if (!ck_pr_icmph(icp, from, cc, 0)) 1584 return 0; 1585 (void)printf("Timestamp Reply"); 1586 break; 1587 1588 case ICMP_IREQ: 1589 if (!ck_pr_icmph(icp, from, cc, 0)) 1590 return 0; 1591 (void)printf("Information Request"); 1592 break; 1593 1594 case ICMP_IREQREPLY: 1595 if (!ck_pr_icmph(icp, from, cc, 0)) 1596 return 0; 1597 (void)printf("Information Reply"); 1598 break; 1599 1600 case ICMP_MASKREQ: 1601 if (!ck_pr_icmph(icp, from, cc, 0)) 1602 return 0; 1603 (void)printf("Address Mask Request"); 1604 break; 1605 1606 case ICMP_MASKREPLY: 1607 if (!ck_pr_icmph(icp, from, cc, 0)) 1608 return 0; 1609 (void)printf("Address Mask Reply"); 1610 break; 1611 1612 default: 1613 if (!ck_pr_icmph(icp, from, cc, 0)) 1614 return 0; 1615 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1616 if (pingflags & F_VERBOSE) 1617 pr_iph(icp, cc); 1618 } 1619 1620 return 1; 1621 } 1622 1623 1624 /* 1625 * Print an IP header with options. 1626 */ 1627 static void 1628 pr_iph(struct icmp *icp, 1629 int cc) 1630 { 1631 int hlen; 1632 u_char *cp; 1633 struct ip ipb, *ip = &ipb; 1634 1635 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1636 1637 hlen = ip->ip_hl << 2; 1638 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1639 1640 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1641 (void)printf(" %1x %1x %02x %04x %04x", 1642 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1643 (void)printf(" %1x %04x", 1644 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1645 (void)printf(" %02x %02x %04x", 1646 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1647 (void)printf(" %15s ", 1648 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1649 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1650 /* dump any option bytes */ 1651 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1652 (void)printf("%02x", *cp++); 1653 } 1654 } 1655 1656 /* 1657 * Print an ASCII host address starting from a string of bytes. 1658 */ 1659 static void 1660 pr_saddr(u_char *cp) 1661 { 1662 n_long l; 1663 struct in_addr addr; 1664 1665 l = (u_char)*++cp; 1666 l = (l<<8) + (u_char)*++cp; 1667 l = (l<<8) + (u_char)*++cp; 1668 l = (l<<8) + (u_char)*++cp; 1669 addr.s_addr = htonl(l); 1670 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1671 } 1672 1673 1674 /* 1675 * Return an ASCII host address 1676 * as a dotted quad and optionally with a hostname 1677 */ 1678 static char * 1679 pr_addr(struct in_addr *addr) /* in network order */ 1680 { 1681 struct hostent *hp; 1682 static char buf[MAXHOSTNAMELEN+4+16+1]; 1683 1684 if ((pingflags & F_NUMERIC) 1685 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1686 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1687 } else { 1688 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1689 inet_ntoa(*addr)); 1690 } 1691 1692 return buf; 1693 } 1694 1695 /* 1696 * Dump some info on a returned (via ICMP) IP packet. 1697 */ 1698 static void 1699 pr_retip(struct icmp *icp, 1700 int cc) 1701 { 1702 int hlen; 1703 u_char *cp; 1704 struct ip ipb, *ip = &ipb; 1705 1706 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1707 1708 if (pingflags & F_VERBOSE) 1709 pr_iph(icp, cc); 1710 1711 hlen = ip->ip_hl << 2; 1712 cp = (u_char *) &icp->icmp_data[hlen]; 1713 1714 if (ip->ip_p == IPPROTO_TCP) { 1715 if (pingflags & F_VERBOSE) 1716 (void)printf("\n TCP: from port %u, to port %u", 1717 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1718 } else if (ip->ip_p == IPPROTO_UDP) { 1719 if (pingflags & F_VERBOSE) 1720 (void)printf("\n UDP: from port %u, to port %u", 1721 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1722 } else if (ip->ip_p == IPPROTO_ICMP) { 1723 struct icmp icp2; 1724 (void) memcpy(&icp2, cp, sizeof(icp2)); 1725 if (icp2.icmp_type == ICMP_ECHO) { 1726 if (pingflags & F_VERBOSE) 1727 (void)printf("\n ID=%u icmp_seq=%u", 1728 ntohs((u_int16_t)icp2.icmp_id), 1729 ntohs((u_int16_t)icp2.icmp_seq)); 1730 else 1731 (void)printf(" for icmp_seq=%u", 1732 ntohs((u_int16_t)icp2.icmp_seq)); 1733 } 1734 } 1735 } 1736 1737 static void 1738 fill(void) 1739 { 1740 int i, j, k; 1741 char *cp; 1742 int pat[16]; 1743 1744 for (cp = fill_pat; *cp != '\0'; cp++) { 1745 if (!isxdigit((unsigned char)*cp)) 1746 break; 1747 } 1748 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1749 (void)fflush(stdout); 1750 errx(1, "\"-p %s\": patterns must be specified with" 1751 " 1-32 hex digits\n", 1752 fill_pat); 1753 } 1754 1755 i = sscanf(fill_pat, 1756 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1757 &pat[0], &pat[1], &pat[2], &pat[3], 1758 &pat[4], &pat[5], &pat[6], &pat[7], 1759 &pat[8], &pat[9], &pat[10], &pat[11], 1760 &pat[12], &pat[13], &pat[14], &pat[15]); 1761 1762 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1763 opack_icmp.icmp_data[k] = pat[j]; 1764 if (++j >= i) 1765 j = 0; 1766 } 1767 1768 if (!(pingflags & F_QUIET)) { 1769 (void)printf("PATTERN: 0x"); 1770 for (j=0; j<i; j++) 1771 (void)printf("%02x", 1772 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1773 (void)printf("\n"); 1774 } 1775 1776 } 1777 1778 1779 static void 1780 rnd_fill(void) 1781 { 1782 static u_int32_t rnd; 1783 int i; 1784 1785 for (i = PHDR_LEN; i < datalen; i++) { 1786 rnd = (3141592621U * rnd + 663896637U); 1787 opack_icmp.icmp_data[i] = rnd>>24; 1788 } 1789 } 1790 1791 1792 static void 1793 gethost(const char *arg, 1794 const char *name, 1795 struct sockaddr_in *sa, 1796 char *realname, 1797 int realname_len) 1798 { 1799 struct hostent *hp; 1800 1801 (void)memset(sa, 0, sizeof(*sa)); 1802 sa->sin_family = AF_INET; 1803 sa->sin_len = sizeof(struct sockaddr_in); 1804 1805 /* If it is an IP address, try to convert it to a name to 1806 * have something nice to display. 1807 */ 1808 if (inet_aton(name, &sa->sin_addr) != 0) { 1809 if (realname) { 1810 if (pingflags & F_NUMERIC) 1811 hp = 0; 1812 else 1813 hp = gethostbyaddr((char *)&sa->sin_addr, 1814 sizeof(sa->sin_addr), 1815 AF_INET); 1816 (void)strlcpy(realname, hp ? hp->h_name : name, 1817 realname_len); 1818 } 1819 return; 1820 } 1821 1822 hp = gethostbyname(name); 1823 if (!hp) 1824 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1825 1826 if (hp->h_addrtype != AF_INET) 1827 errx(1, "%s only supported with IP", arg); 1828 1829 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1830 1831 if (realname) 1832 (void)strlcpy(realname, hp->h_name, realname_len); 1833 } 1834 1835 1836 static void 1837 usage(void) 1838 { 1839 #ifdef IPSEC 1840 #ifdef IPSEC_POLICY_IPSEC 1841 #define IPSECOPT "\n [-E policy] " 1842 #else 1843 #define IPSECOPT "\n [-AE] " 1844 #endif /*IPSEC_POLICY_IPSEC*/ 1845 #else 1846 #define IPSECOPT "" 1847 #endif /*IPSEC*/ 1848 1849 (void)fprintf(stderr, "usage: \n" 1850 "%s [-adDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1851 " [-i interval] [-I addr]\n" 1852 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1853 " [-w maxwait] " IPSECOPT "host\n", 1854 getprogname()); 1855 exit(1); 1856 } 1857
Indexes created Tue Oct 21 16:10:11 GMT 2025