ping.c revision 1.50
1 /* $NetBSD: ping.c,v 1.50 1999/07/02 04:53:24 itojun 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 /* 40 * P I N G . C 41 * 42 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, 43 * measure round-trip-delays and packet loss across network paths. 44 * 45 * Author - 46 * Mike Muuss 47 * U. S. Army Ballistic Research Laboratory 48 * December, 1983 49 * Modified at Uc Berkeley 50 * Record Route and verbose headers - Phil Dykstra, BRL, March 1988. 51 * Multicast options (ttl, if, loop) - Steve Deering, Stanford, August 1988. 52 * ttl, duplicate detection - Cliff Frost, UCB, April 1989 53 * Pad pattern - Cliff Frost (from Tom Ferrin, UCSF), April 1989 54 * 55 * Status - 56 * Public Domain. Distribution Unlimited. 57 * 58 * Bugs - 59 * More statistics could always be gathered. 60 * This program has to run SUID to ROOT to access the ICMP socket. 61 */ 62 63 #include <sys/cdefs.h> 64 #ifndef lint 65 __RCSID("$NetBSD: ping.c,v 1.50 1999/07/02 04:53:24 itojun Exp $"); 66 #endif 67 68 #include <stdio.h> 69 #include <errno.h> 70 #include <sys/time.h> 71 #include <sys/types.h> 72 #include <sys/signal.h> 73 #include <sys/param.h> 74 #include <sys/socket.h> 75 #include <sys/file.h> 76 #include <termios.h> 77 #include <stdlib.h> 78 #include <unistd.h> 79 #include <limits.h> 80 #include <math.h> 81 #include <string.h> 82 #include <err.h> 83 #ifdef sgi 84 #include <bstring.h> 85 #include <getopt.h> 86 #include <sys/prctl.h> 87 #ifndef PRE_KUDZU 88 #include <cap_net.h> 89 #else 90 #define cap_socket socket 91 #endif 92 #else 93 #define cap_socket socket 94 #include <err.h> 95 #endif 96 97 #include <netinet/in_systm.h> 98 #include <netinet/in.h> 99 #include <netinet/ip.h> 100 #include <netinet/ip_icmp.h> 101 #include <netinet/ip_var.h> 102 #include <arpa/inet.h> 103 #include <ctype.h> 104 #include <netdb.h> 105 106 #ifdef IPSEC 107 #include <netinet6/ipsec.h> 108 #endif /*IPSEC*/ 109 110 #define FLOOD_INTVL 0.01 /* default flood output interval */ 111 #define MAXPACKET (65536-60-8) /* max packet size */ 112 113 #define F_VERBOSE 0x0001 114 #define F_QUIET 0x0002 /* minimize all output */ 115 #define F_SEMI_QUIET 0x0004 /* ignore our ICMP errors */ 116 #define F_FLOOD 0x0008 /* flood-ping */ 117 #define F_RECORD_ROUTE 0x0010 /* record route */ 118 #define F_SOURCE_ROUTE 0x0020 /* loose source route */ 119 #define F_PING_FILLED 0x0040 /* is buffer filled with user data? */ 120 #define F_PING_RANDOM 0x0080 /* use random data */ 121 #define F_NUMERIC 0x0100 /* do not do gethostbyaddr() calls */ 122 #define F_TIMING 0x0200 /* room for a timestamp */ 123 #define F_DF 0x0400 /* set IP DF bit */ 124 #define F_SOURCE_ADDR 0x0800 /* set source IP address/interface */ 125 #define F_ONCE 0x1000 /* exit(0) after receiving 1 reply */ 126 #define F_MCAST 0x2000 /* multicast target */ 127 #define F_MCAST_NOLOOP 0x4000 /* no multicast loopback */ 128 #define F_AUDIBLE 0x8000 /* audible output */ 129 #ifdef IPSEC 130 #ifdef IPSEC_POLICY_IPSEC 131 #define F_POLICY 0x10000 132 #else 133 #define F_AUTHHDR 0x10000 134 #define F_ENCRYPT 0x20000 135 #endif /*IPSEC_POLICY_IPSEC*/ 136 #endif /*IPSEC*/ 137 138 139 /* MAX_DUP_CHK is the number of bits in received table, the 140 * maximum number of received sequence numbers we can track to check 141 * for duplicates. 142 */ 143 #define MAX_DUP_CHK (8 * 2048) 144 u_char rcvd_tbl[MAX_DUP_CHK/8]; 145 int nrepeats = 0; 146 #define A(seq) rcvd_tbl[(seq/8)%sizeof(rcvd_tbl)] /* byte in array */ 147 #define B(seq) (1 << (seq & 0x07)) /* bit in byte */ 148 #define SET(seq) (A(seq) |= B(seq)) 149 #define CLR(seq) (A(seq) &= (~B(seq))) 150 #define TST(seq) (A(seq) & B(seq)) 151 152 153 154 u_char *packet; 155 int packlen; 156 int pingflags = 0, options; 157 char *fill_pat; 158 159 int s; /* Socket file descriptor */ 160 int sloop; /* Socket file descriptor/loopback */ 161 162 #define PHDR_LEN sizeof(struct timeval) /* size of timestamp header */ 163 struct sockaddr_in whereto, send_addr; /* Who to ping */ 164 struct sockaddr_in src_addr; /* from where */ 165 struct sockaddr_in loc_addr; /* 127.1 */ 166 int datalen = 64-PHDR_LEN; /* How much data */ 167 168 #ifdef sgi 169 static char *__progname; 170 #else 171 extern char *__progname; 172 #endif 173 174 175 char hostname[MAXHOSTNAMELEN]; 176 177 static struct { 178 struct ip o_ip; 179 char o_opt[MAX_IPOPTLEN]; 180 union { 181 u_char u_buf[MAXPACKET]; 182 struct icmp u_icmp; 183 } o_u; 184 } out_pack; 185 #define opack_icmp out_pack.o_u.u_icmp 186 struct ip *opack_ip; 187 188 char optspace[MAX_IPOPTLEN]; /* record route space */ 189 int optlen; 190 191 192 int npackets; /* total packets to send */ 193 int preload; /* number of packets to "preload" */ 194 int ntransmitted; /* output sequence # = #sent */ 195 int ident; /* our ID, in network byte order */ 196 197 int nreceived; /* # of packets we got back */ 198 199 double interval; /* interval between packets */ 200 struct timeval interval_tv; 201 double tmin = 999999999.0; 202 double tmax = 0.0; 203 double tsum = 0.0; /* sum of all times */ 204 double tsumsq = 0.0; 205 double maxwait = 0.0; 206 207 #ifdef SIGINFO 208 int reset_kerninfo; 209 #endif 210 211 int bufspace = 60*1024; 212 213 struct timeval now, clear_cache, last_tx, next_tx, first_tx; 214 struct timeval last_rx, first_rx; 215 int lastrcvd = 1; /* last ping sent has been received */ 216 217 static struct timeval jiggle_time; 218 static int jiggle_cnt, total_jiggled, jiggle_direction = -1; 219 220 static void doit(void); 221 static void prefinish(int); 222 static void prtsig(int); 223 static void finish(int); 224 static void summary(int); 225 static void pinger(void); 226 static void fill(void); 227 static void rnd_fill(void); 228 static double diffsec(struct timeval *, struct timeval *); 229 static void timevaladd(struct timeval *, struct timeval *); 230 static void sec_to_timeval(const double, struct timeval *); 231 static double timeval_to_sec(const struct timeval *); 232 static void pr_pack(u_char *, int, struct sockaddr_in *); 233 static u_short in_cksum(u_short *, u_int); 234 static void pr_saddr(char *, u_char *); 235 static char *pr_addr(struct in_addr *); 236 static void pr_iph(struct icmp *, int); 237 static void pr_retip(struct icmp *, int); 238 static int pr_icmph(struct icmp *, struct sockaddr_in *, int); 239 static void jiggle(int), jiggle_flush(int); 240 static void gethost(const char *, const char *, 241 struct sockaddr_in *, char *, int); 242 static void usage(void); 243 244 245 int 246 main(int argc, char *argv[]) 247 { 248 int c, i, on = 1, hostind = 0; 249 long l; 250 u_char ttl = 0; 251 u_long tos = 0; 252 char *p; 253 #ifdef SIGINFO 254 struct termios ts; 255 #endif 256 #ifdef IPSEC 257 #ifdef IPSEC_POLICY_IPSEC 258 char *policy = NULL; 259 #endif 260 #endif 261 262 263 #ifdef sgi 264 __progname = argv[0]; 265 #endif 266 #ifndef IPSEC 267 #define IPSECOPT 268 #else 269 #ifdef IPSEC_POLICY_IPSEC 270 #define IPSECOPT "E:" 271 #else 272 #define IPSECOPT "AE" 273 #endif /*IPSEC_POLICY_IPSEC*/ 274 #endif 275 while ((c = getopt(argc, argv, 276 "ac:dDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 277 #undef IPSECOPT 278 switch (c) { 279 case 'a': 280 pingflags |= F_AUDIBLE; 281 break; 282 case 'c': 283 npackets = strtol(optarg, &p, 0); 284 if (*p != '\0' || npackets <= 0) 285 errx(1, "Bad/invalid number of packets"); 286 break; 287 case 'D': 288 pingflags |= F_DF; 289 break; 290 case 'd': 291 options |= SO_DEBUG; 292 break; 293 case 'f': 294 pingflags |= F_FLOOD; 295 break; 296 case 'h': 297 hostind = optind-1; 298 break; 299 case 'i': /* wait between sending packets */ 300 interval = strtod(optarg, &p); 301 if (*p != '\0' || interval <= 0) 302 errx(1, "Bad/invalid interval %s", optarg); 303 break; 304 case 'l': 305 preload = strtol(optarg, &p, 0); 306 if (*p != '\0' || preload < 0) 307 errx(1, "Bad/invalid preload value %s", 308 optarg); 309 break; 310 case 'n': 311 pingflags |= F_NUMERIC; 312 break; 313 case 'o': 314 pingflags |= F_ONCE; 315 break; 316 case 'p': /* fill buffer with user pattern */ 317 if (pingflags & F_PING_RANDOM) 318 errx(1, "Only one of -P and -p allowed"); 319 pingflags |= F_PING_FILLED; 320 fill_pat = optarg; 321 break; 322 case 'P': 323 if (pingflags & F_PING_FILLED) 324 errx(1, "Only one of -P and -p allowed"); 325 pingflags |= F_PING_RANDOM; 326 break; 327 case 'q': 328 pingflags |= F_QUIET; 329 break; 330 case 'Q': 331 pingflags |= F_SEMI_QUIET; 332 break; 333 case 'r': 334 options |= SO_DONTROUTE; 335 break; 336 case 's': /* size of packet to send */ 337 datalen = strtol(optarg, &p, 0); 338 if (*p != '\0' || datalen <= 0) 339 errx(1, "Bad/invalid packet size %s", optarg); 340 if (datalen > MAXPACKET) 341 errx(1, "packet size is too large"); 342 break; 343 case 'v': 344 pingflags |= F_VERBOSE; 345 break; 346 case 'R': 347 pingflags |= F_RECORD_ROUTE; 348 break; 349 case 'L': 350 pingflags |= F_MCAST_NOLOOP; 351 break; 352 case 't': 353 tos = strtoul(optarg, &p, 0); 354 if (*p != '\0' || tos > 0xFF) 355 errx(1, "bad tos value: %s", optarg); 356 break; 357 case 'T': 358 l = strtol(optarg, &p, 0); 359 if (*p != '\0' || l > 255 || l <= 0) 360 errx(1, "ttl out of range"); 361 ttl = (u_char)l; /* cannot check >255 otherwise */ 362 break; 363 case 'I': 364 pingflags |= F_SOURCE_ADDR; 365 gethost("-I", optarg, &src_addr, 0, 0); 366 break; 367 case 'g': 368 pingflags |= F_SOURCE_ROUTE; 369 gethost("-g", optarg, &send_addr, 0, 0); 370 break; 371 case 'w': 372 maxwait = strtod(optarg, &p); 373 if (*p != '\0' || maxwait <= 0) 374 errx(1, "Bad/invalid maxwait time %s", optarg); 375 break; 376 #ifdef IPSEC 377 #ifdef IPSEC_POLICY_IPSEC 378 case 'E': 379 pingflags |= F_POLICY; 380 policy = strdup(optarg); 381 break; 382 #else 383 case 'A': 384 pingflags |= F_AUTHHDR; 385 break; 386 case 'E': 387 pingflags |= F_ENCRYPT; 388 break; 389 #endif /*IPSEC_POLICY_IPSEC*/ 390 #endif /*IPSEC*/ 391 default: 392 usage(); 393 break; 394 } 395 } 396 397 if (interval == 0) 398 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 399 #ifndef sgi 400 if (pingflags & F_FLOOD && getuid()) 401 errx(1, "Must be superuser to use -f"); 402 if (interval < 1.0 && getuid()) 403 errx(1, "Must be superuser to use < 1 sec ping interval"); 404 if (preload > 0 && getuid()) 405 errx(1, "Must be superuser to use -l"); 406 #endif 407 sec_to_timeval(interval, &interval_tv); 408 409 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 410 warnx("Sorry, no audible output for flood pings"); 411 412 if (npackets != 0) { 413 npackets += preload; 414 } else { 415 npackets = INT_MAX; 416 } 417 418 if (hostind == 0) { 419 if (optind != argc-1) 420 usage(); 421 else 422 hostind = optind; 423 } 424 else if (hostind >= argc - 1) 425 usage(); 426 427 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 428 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 429 pingflags |= F_MCAST; 430 if (!(pingflags & F_SOURCE_ROUTE)) 431 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 432 433 loc_addr.sin_family = AF_INET; 434 loc_addr.sin_addr.s_addr = htonl((127<<24)+1); 435 436 if (datalen >= PHDR_LEN) /* can we time them? */ 437 pingflags |= F_TIMING; 438 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 439 if ((packet = (u_char *)malloc(packlen)) == NULL) 440 err(1, "Out of memory"); 441 442 if (pingflags & F_PING_FILLED) { 443 fill(); 444 } else if (pingflags & F_PING_RANDOM) { 445 rnd_fill(); 446 } else { 447 for (i = PHDR_LEN; i < datalen; i++) 448 opack_icmp.icmp_data[i] = i; 449 } 450 451 ident = htons(getpid()) & 0xFFFF; 452 453 if ((s = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 454 err(1, "Cannot create socket"); 455 if (options & SO_DEBUG) { 456 if (setsockopt(s, SOL_SOCKET, SO_DEBUG, 457 (char *)&on, sizeof(on)) == -1) 458 warn("Can't turn on socket debugging"); 459 } 460 if (options & SO_DONTROUTE) { 461 if (setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 462 (char *)&on, sizeof(on)) == -1) 463 warn("SO_DONTROUTE"); 464 } 465 466 if ((sloop = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 467 err(1, "Cannot create socket"); 468 if (options & SO_DEBUG) { 469 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 470 (char *)&on, sizeof(on)) == -1) 471 warn("Can't turn on socket debugging"); 472 } 473 if (options & SO_DONTROUTE) { 474 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 475 (char *)&on, sizeof(on)) == -1) 476 warn("SO_DONTROUTE"); 477 } 478 479 if (pingflags & F_SOURCE_ROUTE) { 480 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 481 optspace[IPOPT_OLEN] = optlen = 7; 482 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 483 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 484 sizeof(whereto.sin_addr)); 485 optspace[optlen++] = IPOPT_NOP; 486 } 487 if (pingflags & F_RECORD_ROUTE) { 488 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 489 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 490 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 491 optlen = MAX_IPOPTLEN; 492 } 493 /* this leaves opack_ip 0(mod 4) aligned */ 494 opack_ip = (struct ip *)((char *)&out_pack.o_ip 495 + sizeof(out_pack.o_opt) 496 - optlen); 497 (void) memcpy(opack_ip + 1, optspace, optlen); 498 499 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 500 err(1, "Can't set special IP header"); 501 502 opack_ip->ip_v = IPVERSION; 503 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 504 opack_ip->ip_tos = tos; 505 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 506 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 507 opack_ip->ip_p = IPPROTO_ICMP; 508 opack_ip->ip_src = src_addr.sin_addr; 509 opack_ip->ip_dst = send_addr.sin_addr; 510 511 if (pingflags & F_MCAST) { 512 if (pingflags & F_MCAST_NOLOOP) { 513 u_char loop = 0; 514 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 515 (char *) &loop, 1) < 0) 516 err(1, "Can't disable multicast loopback"); 517 } 518 519 if (ttl != 0 520 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 521 (char *) &ttl, 1) < 0) 522 err(1, "Can't set multicast time-to-live"); 523 524 if ((pingflags & F_SOURCE_ADDR) 525 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 526 (char *) &src_addr.sin_addr, 527 sizeof(src_addr.sin_addr)) < 0) 528 err(1, "Can't set multicast source interface"); 529 530 } else if (pingflags & F_SOURCE_ADDR) { 531 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 532 (char *) &src_addr.sin_addr, 533 sizeof(src_addr.sin_addr)) < 0) 534 err(1, "Can't set source interface/address"); 535 } 536 #ifdef IPSEC 537 #ifdef IPSEC_POLICY_IPSEC 538 { 539 int len; 540 char *buf; 541 if (pingflags & F_POLICY) { 542 if ((len = ipsec_get_policylen(policy)) < 0) 543 errx(1, ipsec_strerror()); 544 if ((buf = malloc(len)) == NULL) 545 err(1, "malloc"); 546 if ((len = ipsec_set_policy(buf, len, policy)) < 0) 547 errx(1, ipsec_strerror()); 548 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, buf, len) < 0) 549 err(1, NULL); 550 free(buf); 551 } 552 if ((len = ipsec_get_policylen("bypass")) < 0) 553 errx(1, ipsec_strerror()); 554 if ((buf = malloc(len)) == NULL) 555 err(1, "malloc"); 556 if ((len = ipsec_set_policy(buf, len, "bypass")) < 0) 557 errx(1, ipsec_strerror()); 558 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, buf, len) < 0) 559 warnx("ipsec is not configured"); 560 free(buf); 561 } 562 #else 563 { 564 int optval; 565 if (pingflags & F_AUTHHDR) { 566 optval = IPSEC_LEVEL_REQUIRE; 567 #ifdef IP_AUTH_TRANS_LEVEL 568 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 569 (char *)&optval, sizeof(optval)); 570 #else 571 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 572 (char *)&optval, sizeof(optval)); 573 #endif 574 } 575 if (pingflags & F_ENCRYPT) { 576 optval = IPSEC_LEVEL_REQUIRE; 577 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 578 (char *)&optval, sizeof(optval)); 579 } 580 optval = IPSEC_LEVEL_BYPASS; 581 #ifdef IP_AUTH_TRANS_LEVEL 582 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 583 (char *)&optval, sizeof(optval)); 584 #else 585 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 586 (char *)&optval, sizeof(optval)); 587 #endif 588 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 589 (char *)&optval, sizeof(optval)); 590 } 591 #endif /*IPSEC_POLICY_IPSEC*/ 592 #endif /*IPSEC*/ 593 594 (void)printf("PING %s (%s): %d data bytes\n", hostname, 595 inet_ntoa(whereto.sin_addr), datalen); 596 597 /* When pinging the broadcast address, you can get a lot 598 * of answers. Doing something so evil is useful if you 599 * are trying to stress the ethernet, or just want to 600 * fill the arp cache to get some stuff for /etc/ethers. 601 */ 602 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 603 (char*)&bufspace, sizeof(bufspace))) { 604 if ((bufspace -= 4096) == 0) 605 err(1, "Cannot set the receive buffer size"); 606 } 607 608 /* make it possible to send giant probes, but do not worry now 609 * if it fails, since we probably won't send giant probes. 610 */ 611 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 612 (char*)&bufspace, sizeof(bufspace)); 613 614 (void)signal(SIGINT, prefinish); 615 616 #if defined(SIGINFO) && defined(NOKERNINFO) 617 if (tcgetattr (0, &ts) != -1) { 618 reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 619 ts.c_lflag |= NOKERNINFO; 620 tcsetattr (0, TCSANOW, &ts); 621 } 622 #endif 623 624 #ifdef SIGINFO 625 (void)signal(SIGINFO, prtsig); 626 #else 627 (void)signal(SIGQUIT, prtsig); 628 #endif 629 (void)signal(SIGCONT, prtsig); 630 631 /* fire off them quickies */ 632 for (i = 0; i < preload; i++) { 633 (void)gettimeofday(&now, 0); 634 pinger(); 635 } 636 637 doit(); 638 return 0; 639 } 640 641 642 static void 643 doit(void) 644 { 645 int cc; 646 struct sockaddr_in from; 647 int fromlen; 648 double sec, last, d_last; 649 struct timeval timeout; 650 fd_set fdmask; 651 652 653 (void)gettimeofday(&clear_cache,0); 654 if (maxwait != 0) { 655 last = timeval_to_sec(&clear_cache) + maxwait; 656 d_last = 0; 657 } else { 658 last = 0; 659 d_last = 365*24*60*60; 660 } 661 662 FD_ZERO(&fdmask); 663 do { 664 (void)gettimeofday(&now,0); 665 666 if (last != 0) 667 d_last = last - timeval_to_sec(&now); 668 669 if (ntransmitted < npackets && d_last > 0) { 670 /* send if within 100 usec or late for next packet */ 671 sec = diffsec(&next_tx,&now); 672 if (sec <= 0.0001 673 || (lastrcvd && (pingflags & F_FLOOD))) { 674 pinger(); 675 sec = diffsec(&next_tx,&now); 676 } 677 if (sec < 0.0) 678 sec = 0.0; 679 if (d_last < sec) 680 sec = d_last; 681 682 } else { 683 /* For the last response, wait twice as long as the 684 * worst case seen, or 10 times as long as the 685 * maximum interpacket interval, whichever is longer. 686 */ 687 sec = MAX(2*tmax,10*interval) - diffsec(&now,&last_tx); 688 if (d_last < sec) 689 sec = d_last; 690 if (sec <= 0) 691 break; 692 } 693 694 695 sec_to_timeval(sec, &timeout); 696 697 FD_SET(s, &fdmask); 698 cc = select(s+1, &fdmask, 0, 0, &timeout); 699 if (cc <= 0) { 700 if (cc < 0) { 701 if (errno == EINTR) 702 continue; 703 jiggle_flush(1); 704 err(1, "select"); 705 } 706 continue; 707 } 708 709 fromlen = sizeof(from); 710 cc = recvfrom(s, (char *) packet, packlen, 711 0, (struct sockaddr *)&from, 712 &fromlen); 713 if (cc < 0) { 714 if (errno != EINTR) { 715 jiggle_flush(1); 716 warn("recvfrom"); 717 (void)fflush(stderr); 718 } 719 continue; 720 } 721 (void)gettimeofday(&now, 0); 722 pr_pack(packet, cc, &from); 723 724 } while (nreceived < npackets 725 && (nreceived == 0 || !(pingflags & F_ONCE))); 726 727 finish(0); 728 } 729 730 731 static void 732 jiggle_flush(int nl) /* new line if there are dots */ 733 { 734 int serrno = errno; 735 736 if (jiggle_cnt > 0) { 737 total_jiggled += jiggle_cnt; 738 jiggle_direction = 1; 739 do { 740 (void)putchar('.'); 741 } while (--jiggle_cnt > 0); 742 743 } else if (jiggle_cnt < 0) { 744 total_jiggled -= jiggle_cnt; 745 jiggle_direction = -1; 746 do { 747 (void)putchar('\b'); 748 } while (++jiggle_cnt < 0); 749 } 750 751 if (nl) { 752 if (total_jiggled != 0) 753 (void)putchar('\n'); 754 total_jiggled = 0; 755 jiggle_direction = -1; 756 } 757 758 (void)fflush(stdout); 759 (void)fflush(stderr); 760 jiggle_time = now; 761 errno = serrno; 762 } 763 764 765 /* jiggle the cursor for flood-ping 766 */ 767 static void 768 jiggle(int delta) 769 { 770 double dt; 771 772 if (pingflags & F_QUIET) 773 return; 774 775 /* do not back up into messages */ 776 if (total_jiggled+jiggle_cnt+delta < 0) 777 return; 778 779 jiggle_cnt += delta; 780 781 /* flush the FLOOD dots when things are quiet 782 * or occassionally to make the cursor jiggle. 783 */ 784 dt = diffsec(&last_tx, &jiggle_time); 785 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 786 jiggle_flush(0); 787 } 788 789 790 /* 791 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 792 * will be added on by the kernel. The ID field is our UNIX process ID, 793 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 794 * of the data portion are used to hold a UNIX "timeval" struct in VAX 795 * byte-order, to compute the round-trip time. 796 */ 797 static void 798 pinger(void) 799 { 800 int i, cc, sw; 801 802 opack_icmp.icmp_code = 0; 803 opack_icmp.icmp_seq = htons((u_short)(ntransmitted)); 804 805 /* clear the cached route in the kernel after an ICMP 806 * response such as a Redirect is seen to stop causing 807 * more such packets. Also clear the cached route 808 * periodically in case of routing changes that make 809 * black holes come and go. 810 */ 811 if (clear_cache.tv_sec != now.tv_sec) { 812 opack_icmp.icmp_type = ICMP_ECHOREPLY; 813 opack_icmp.icmp_id = ~ident; 814 opack_icmp.icmp_cksum = 0; 815 opack_icmp.icmp_cksum = in_cksum((u_short*)&opack_icmp, 816 PHDR_LEN); 817 sw = 0; 818 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 819 (char *)&sw,sizeof(sw)) < 0) 820 err(1, "Can't turn off special IP header"); 821 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 822 (struct sockaddr *)&loc_addr, 823 sizeof(struct sockaddr_in)) < 0) { 824 /* 825 * XXX: we only report this as a warning in verbose 826 * mode because people get confused when they see 827 * this error when they are running in single user 828 * mode and they have not configured lo0 829 */ 830 if (pingflags & F_VERBOSE) 831 warn("failed to clear cached route"); 832 } 833 sw = 1; 834 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 835 (char *)&sw, sizeof(sw)) < 0) 836 err(1, "Can't set special IP header"); 837 838 (void)gettimeofday(&clear_cache,0); 839 } 840 841 opack_icmp.icmp_type = ICMP_ECHO; 842 opack_icmp.icmp_id = ident; 843 if (pingflags & F_TIMING) 844 (void) memcpy(&opack_icmp.icmp_data[0], &now, sizeof(now)); 845 cc = datalen+PHDR_LEN; 846 opack_icmp.icmp_cksum = 0; 847 opack_icmp.icmp_cksum = in_cksum((u_short*)&opack_icmp, cc); 848 849 cc += opack_ip->ip_hl<<2; 850 opack_ip->ip_len = cc; 851 i = sendto(s, (char *) opack_ip, cc, 0, 852 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 853 if (i != cc) { 854 jiggle_flush(1); 855 if (i < 0) 856 warn("sendto"); 857 else 858 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 859 (void)fflush(stderr); 860 } 861 lastrcvd = 0; 862 863 CLR(ntransmitted); 864 ntransmitted++; 865 866 last_tx = now; 867 if (next_tx.tv_sec == 0) { 868 first_tx = now; 869 next_tx = now; 870 } 871 872 /* Transmit regularly, at always the same microsecond in the 873 * second when going at one packet per second. 874 * If we are at most 100 ms behind, send extras to get caught up. 875 * Otherwise, skip packets we were too slow to send. 876 */ 877 if (diffsec(&next_tx, &now) <= interval) { 878 do { 879 timevaladd(&next_tx, &interval_tv); 880 } while (diffsec(&next_tx, &now) < -0.1); 881 } 882 883 if (pingflags & F_FLOOD) 884 jiggle(1); 885 886 /* While the packet is going out, ready buffer for the next 887 * packet. Use a fast but not very good random number generator. 888 */ 889 if (pingflags & F_PING_RANDOM) 890 rnd_fill(); 891 } 892 893 894 static void 895 pr_pack_sub(int cc, 896 char *addr, 897 int seqno, 898 int dupflag, 899 int ttl, 900 double triptime) 901 { 902 jiggle_flush(1); 903 904 if (pingflags & F_FLOOD) 905 return; 906 907 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 908 if (dupflag) 909 (void)printf(" DUP!"); 910 (void)printf(" ttl=%d", ttl); 911 if (pingflags & F_TIMING) 912 (void)printf(" time=%.3f ms", triptime*1000.0); 913 914 /* 915 * Send beep to stderr, since that's more likely than stdout 916 * to go to a terminal.. 917 */ 918 if (pingflags & F_AUDIBLE && !dupflag) 919 (void)fprintf(stderr,"\a"); 920 } 921 922 923 /* 924 * Print out the packet, if it came from us. This logic is necessary 925 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 926 * which arrive ('tis only fair). This permits multiple copies of this 927 * program to be run without having intermingled output (or statistics!). 928 */ 929 static void 930 pr_pack(u_char *buf, 931 int tot_len, 932 struct sockaddr_in *from) 933 { 934 struct ip *ip; 935 struct icmp *icp; 936 int i, j, net_len; 937 u_char *cp; 938 static int old_rrlen; 939 static char old_rr[MAX_IPOPTLEN]; 940 int hlen, dupflag = 0, dumped; 941 double triptime = 0.0; 942 #define PR_PACK_SUB() {if (!dumped) { \ 943 dumped = 1; \ 944 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 945 ntohs((u_short)icp->icmp_seq), \ 946 dupflag, ip->ip_ttl, triptime);}} 947 948 /* Check the IP header */ 949 ip = (struct ip *) buf; 950 hlen = ip->ip_hl << 2; 951 if (tot_len < hlen + ICMP_MINLEN) { 952 if (pingflags & F_VERBOSE) { 953 jiggle_flush(1); 954 (void)printf("packet too short (%d bytes) from %s\n", 955 tot_len, inet_ntoa(from->sin_addr)); 956 } 957 return; 958 } 959 960 /* Now the ICMP part */ 961 dumped = 0; 962 net_len = tot_len - hlen; 963 icp = (struct icmp *)(buf + hlen); 964 if (icp->icmp_type == ICMP_ECHOREPLY 965 && icp->icmp_id == ident) { 966 if (icp->icmp_seq == htons((u_short)(ntransmitted-1))) 967 lastrcvd = 1; 968 last_rx = now; 969 if (first_rx.tv_sec == 0) 970 first_rx = last_rx; 971 nreceived++; 972 if (pingflags & F_TIMING) { 973 struct timeval tv; 974 (void) memcpy(&tv, icp->icmp_data, sizeof(tv)); 975 triptime = diffsec(&last_rx, &tv); 976 tsum += triptime; 977 tsumsq += triptime * triptime; 978 if (triptime < tmin) 979 tmin = triptime; 980 if (triptime > tmax) 981 tmax = triptime; 982 } 983 984 if (TST(ntohs((u_short)icp->icmp_seq))) { 985 nrepeats++, nreceived--; 986 dupflag=1; 987 } else { 988 SET(ntohs((u_short)icp->icmp_seq)); 989 } 990 991 if (tot_len != opack_ip->ip_len) { 992 PR_PACK_SUB(); 993 (void)printf("\nwrong total length %d instead of %d", 994 tot_len, opack_ip->ip_len); 995 } 996 997 if (pingflags & F_QUIET) 998 return; 999 1000 if (!(pingflags & F_FLOOD)) 1001 PR_PACK_SUB(); 1002 1003 /* check the data */ 1004 if (datalen > PHDR_LEN 1005 && !(pingflags & F_PING_RANDOM) 1006 && memcmp(&icp->icmp_data[PHDR_LEN], 1007 &opack_icmp.icmp_data[PHDR_LEN], 1008 datalen-PHDR_LEN)) { 1009 for (i=PHDR_LEN; i<datalen; i++) { 1010 if (icp->icmp_data[PHDR_LEN+i] 1011 != opack_icmp.icmp_data[PHDR_LEN+i]) 1012 break; 1013 } 1014 PR_PACK_SUB(); 1015 (void)printf("\nwrong data byte #%d should have been" 1016 " %#x but was %#x", 1017 i, (u_char)opack_icmp.icmp_data[i], 1018 (u_char)icp->icmp_data[i]); 1019 for (i=PHDR_LEN; i<datalen; i++) { 1020 if ((i%16) == PHDR_LEN) 1021 (void)printf("\n\t"); 1022 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1023 } 1024 } 1025 1026 } else { 1027 if (!pr_icmph(icp, from, net_len)) 1028 return; 1029 dumped = 2; 1030 } 1031 1032 /* Display any IP options */ 1033 cp = buf + sizeof(struct ip); 1034 while (hlen > (int)sizeof(struct ip)) { 1035 switch (*cp) { 1036 case IPOPT_EOL: 1037 hlen = 0; 1038 break; 1039 case IPOPT_LSRR: 1040 hlen -= 2; 1041 j = *++cp; 1042 ++cp; 1043 j -= IPOPT_MINOFF; 1044 if (j <= 0) 1045 continue; 1046 if (dumped <= 1) { 1047 j = ((j+3)/4)*4; 1048 hlen -= j; 1049 cp += j; 1050 break; 1051 } 1052 PR_PACK_SUB(); 1053 (void)printf("\nLSRR: "); 1054 for (;;) { 1055 pr_saddr("\t%s", cp); 1056 cp += 4; 1057 hlen -= 4; 1058 j -= 4; 1059 if (j <= 0) 1060 break; 1061 (void)putchar('\n'); 1062 } 1063 break; 1064 case IPOPT_RR: 1065 j = *++cp; /* get length */ 1066 i = *++cp; /* and pointer */ 1067 hlen -= 2; 1068 if (i > j) 1069 i = j; 1070 i -= IPOPT_MINOFF; 1071 if (i <= 0) 1072 continue; 1073 if (dumped <= 1) { 1074 if (i == old_rrlen 1075 && !memcmp(cp, old_rr, i)) { 1076 if (dumped) 1077 (void)printf("\t(same route)"); 1078 j = ((i+3)/4)*4; 1079 hlen -= j; 1080 cp += j; 1081 break; 1082 } 1083 old_rrlen = i; 1084 (void) memcpy(old_rr, cp, i); 1085 } 1086 if (!dumped) { 1087 jiggle_flush(1); 1088 (void)printf("RR: "); 1089 dumped = 1; 1090 } else { 1091 (void)printf("\nRR: "); 1092 } 1093 for (;;) { 1094 pr_saddr("\t%s", cp); 1095 cp += 4; 1096 hlen -= 4; 1097 i -= 4; 1098 if (i <= 0) 1099 break; 1100 (void)putchar('\n'); 1101 } 1102 break; 1103 case IPOPT_NOP: 1104 if (dumped <= 1) 1105 break; 1106 PR_PACK_SUB(); 1107 (void)printf("\nNOP"); 1108 break; 1109 #ifdef sgi 1110 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1111 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1112 case IPOPT_CIPSO: /* Commercial IPSO */ 1113 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1114 i = (unsigned)cp[1]; 1115 hlen -= i - 1; 1116 PR_PACK_SUB(); 1117 (void)printf("\nSEC:"); 1118 while (i--) { 1119 (void)printf(" %02x", *cp++); 1120 } 1121 cp--; 1122 break; 1123 } 1124 #endif 1125 default: 1126 PR_PACK_SUB(); 1127 (void)printf("\nunknown option 0x%x", *cp); 1128 break; 1129 } 1130 hlen--; 1131 cp++; 1132 } 1133 1134 if (dumped) { 1135 (void)putchar('\n'); 1136 (void)fflush(stdout); 1137 } else { 1138 jiggle(-1); 1139 } 1140 } 1141 1142 1143 /* Compute the IP checksum 1144 * This assumes the packet is less than 32K long. 1145 */ 1146 static u_short 1147 in_cksum(u_short *p, 1148 u_int len) 1149 { 1150 u_int sum = 0; 1151 int nwords = len >> 1; 1152 1153 while (nwords-- != 0) 1154 sum += *p++; 1155 1156 if (len & 1) { 1157 union { 1158 u_short w; 1159 u_char c[2]; 1160 } u; 1161 u.c[0] = *(u_char *)p; 1162 u.c[1] = 0; 1163 sum += u.w; 1164 } 1165 1166 /* end-around-carry */ 1167 sum = (sum >> 16) + (sum & 0xffff); 1168 sum += (sum >> 16); 1169 return (~sum); 1170 } 1171 1172 1173 /* 1174 * compute the difference of two timevals in seconds 1175 */ 1176 static double 1177 diffsec(struct timeval *now, 1178 struct timeval *then) 1179 { 1180 return ((now->tv_sec - then->tv_sec)*1.0 1181 + (now->tv_usec - then->tv_usec)/1000000.0); 1182 } 1183 1184 1185 static void 1186 timevaladd(struct timeval *t1, 1187 struct timeval *t2) 1188 { 1189 1190 t1->tv_sec += t2->tv_sec; 1191 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1192 t1->tv_sec++; 1193 t1->tv_usec -= 1000000; 1194 } 1195 } 1196 1197 1198 static void 1199 sec_to_timeval(const double sec, struct timeval *tp) 1200 { 1201 tp->tv_sec = sec; 1202 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1203 } 1204 1205 1206 static double 1207 timeval_to_sec(const struct timeval *tp) 1208 { 1209 return tp->tv_sec + tp->tv_usec / 1000000.0; 1210 } 1211 1212 1213 /* 1214 * Print statistics. 1215 * Heavily buffered STDIO is used here, so that all the statistics 1216 * will be written with 1 sys-write call. This is nice when more 1217 * than one copy of the program is running on a terminal; it prevents 1218 * the statistics output from becomming intermingled. 1219 */ 1220 static void 1221 summary(int header) 1222 { 1223 jiggle_flush(1); 1224 1225 if (header) 1226 (void)printf("\n----%s PING Statistics----\n", hostname); 1227 (void)printf("%d packets transmitted, ", ntransmitted); 1228 (void)printf("%d packets received, ", nreceived); 1229 if (nrepeats) 1230 (void)printf("+%d duplicates, ", nrepeats); 1231 if (ntransmitted) { 1232 if (nreceived > ntransmitted) 1233 (void)printf("-- somebody's printing up packets!"); 1234 else 1235 (void)printf("%.1f%% packet loss", 1236 (((ntransmitted-nreceived)*100.0) / 1237 ntransmitted)); 1238 } 1239 (void)printf("\n"); 1240 if (nreceived && (pingflags & F_TIMING)) { 1241 double n = nreceived + nrepeats; 1242 double avg = (tsum / n); 1243 double variance = 0.0; 1244 if (n>1) 1245 variance = (tsumsq - n*avg*avg) /(n-1); 1246 1247 printf("round-trip min/avg/max/stddev = " 1248 "%.3f/%.3f/%.3f/%.3f ms\n", 1249 tmin * 1000.0, avg * 1000.0, 1250 tmax * 1000.0, sqrt(variance) * 1000.0); 1251 if (pingflags & F_FLOOD) { 1252 double r = diffsec(&last_rx, &first_rx); 1253 double t = diffsec(&last_tx, &first_tx); 1254 if (r == 0) 1255 r = 0.0001; 1256 if (t == 0) 1257 t = 0.0001; 1258 (void)printf(" %.1f packets/sec sent, " 1259 " %.1f packets/sec received\n", 1260 ntransmitted/t, nreceived/r); 1261 } 1262 } 1263 } 1264 1265 1266 /* 1267 * Print statistics when SIGINFO is received. 1268 */ 1269 /* ARGSUSED */ 1270 static void 1271 prtsig(int s) 1272 { 1273 summary(0); 1274 #ifdef SIGINFO 1275 (void)signal(SIGINFO, prtsig); 1276 #else 1277 (void)signal(SIGQUIT, prtsig); 1278 #endif 1279 } 1280 1281 1282 /* 1283 * On the first SIGINT, allow any outstanding packets to dribble in 1284 */ 1285 static void 1286 prefinish(int s) 1287 { 1288 if (lastrcvd /* quit now if caught up */ 1289 || nreceived == 0) /* or if remote is dead */ 1290 finish(0); 1291 1292 (void)signal(s, finish); /* do this only the 1st time */ 1293 1294 if (npackets > ntransmitted) /* let the normal limit work */ 1295 npackets = ntransmitted; 1296 } 1297 1298 1299 /* 1300 * Print statistics and give up. 1301 */ 1302 /* ARGSUSED */ 1303 static void 1304 finish(int s) 1305 { 1306 #if defined(SIGINFO) && defined(NOKERNINFO) 1307 struct termios ts; 1308 1309 if (reset_kerninfo && tcgetattr (0, &ts) != -1) { 1310 ts.c_lflag &= ~NOKERNINFO; 1311 tcsetattr (0, TCSANOW, &ts); 1312 } 1313 (void)signal(SIGINFO, SIG_IGN); 1314 #else 1315 (void)signal(SIGQUIT, SIG_DFL); 1316 #endif 1317 1318 summary(1); 1319 exit(nreceived > 0 ? 0 : 2); 1320 } 1321 1322 1323 static int /* 0=do not print it */ 1324 ck_pr_icmph(struct icmp *icp, 1325 struct sockaddr_in *from, 1326 int cc, 1327 int override) /* 1=override VERBOSE if interesting */ 1328 { 1329 int hlen; 1330 struct ip ipb, *ip = &ipb; 1331 struct icmp icp2b, *icp2 = &icp2b; 1332 int res; 1333 1334 if (pingflags & F_VERBOSE) { 1335 res = 1; 1336 jiggle_flush(1); 1337 } else { 1338 res = 0; 1339 } 1340 1341 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1342 hlen = ip->ip_hl << 2; 1343 if (ip->ip_p == IPPROTO_ICMP 1344 && hlen + 6 <= cc) { 1345 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1346 if (icp2->icmp_id == ident) { 1347 /* remember to clear route cached in kernel 1348 * if this non-Echo-Reply ICMP message was for one 1349 * of our packets. 1350 */ 1351 clear_cache.tv_sec = 0; 1352 1353 if (!res && override 1354 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1355 jiggle_flush(1); 1356 (void)printf("%d bytes from %s: ", 1357 cc, pr_addr(&from->sin_addr)); 1358 res = 1; 1359 } 1360 } 1361 } 1362 1363 return res; 1364 } 1365 1366 1367 /* 1368 * Print a descriptive string about an ICMP header other than an echo reply. 1369 */ 1370 static int /* 0=printed nothing */ 1371 pr_icmph(struct icmp *icp, 1372 struct sockaddr_in *from, 1373 int cc) 1374 { 1375 switch (icp->icmp_type ) { 1376 case ICMP_UNREACH: 1377 if (!ck_pr_icmph(icp, from, cc, 1)) 1378 return 0; 1379 switch (icp->icmp_code) { 1380 case ICMP_UNREACH_NET: 1381 (void)printf("Destination Net Unreachable"); 1382 break; 1383 case ICMP_UNREACH_HOST: 1384 (void)printf("Destination Host Unreachable"); 1385 break; 1386 case ICMP_UNREACH_PROTOCOL: 1387 (void)printf("Destination Protocol Unreachable"); 1388 break; 1389 case ICMP_UNREACH_PORT: 1390 (void)printf("Destination Port Unreachable"); 1391 break; 1392 case ICMP_UNREACH_NEEDFRAG: 1393 (void)printf("frag needed and DF set. Next MTU=%d", 1394 ntohs(icp->icmp_nextmtu)); 1395 break; 1396 case ICMP_UNREACH_SRCFAIL: 1397 (void)printf("Source Route Failed"); 1398 break; 1399 case ICMP_UNREACH_NET_UNKNOWN: 1400 (void)printf("Unreachable unknown net"); 1401 break; 1402 case ICMP_UNREACH_HOST_UNKNOWN: 1403 (void)printf("Unreachable unknown host"); 1404 break; 1405 case ICMP_UNREACH_ISOLATED: 1406 (void)printf("Unreachable host isolated"); 1407 break; 1408 case ICMP_UNREACH_NET_PROHIB: 1409 (void)printf("Net prohibited access"); 1410 break; 1411 case ICMP_UNREACH_HOST_PROHIB: 1412 (void)printf("Host prohibited access"); 1413 break; 1414 case ICMP_UNREACH_TOSNET: 1415 (void)printf("Bad TOS for net"); 1416 break; 1417 case ICMP_UNREACH_TOSHOST: 1418 (void)printf("Bad TOS for host"); 1419 break; 1420 case 13: 1421 (void)printf("Communication prohibited"); 1422 break; 1423 case 14: 1424 (void)printf("Host precedence violation"); 1425 break; 1426 case 15: 1427 (void)printf("Precedence cutoff"); 1428 break; 1429 default: 1430 (void)printf("Bad Destination Unreachable Code: %d", 1431 icp->icmp_code); 1432 break; 1433 } 1434 /* Print returned IP header information */ 1435 pr_retip(icp, cc); 1436 break; 1437 1438 case ICMP_SOURCEQUENCH: 1439 if (!ck_pr_icmph(icp, from, cc, 1)) 1440 return 0; 1441 (void)printf("Source Quench"); 1442 pr_retip(icp, cc); 1443 break; 1444 1445 case ICMP_REDIRECT: 1446 if (!ck_pr_icmph(icp, from, cc, 1)) 1447 return 0; 1448 switch (icp->icmp_code) { 1449 case ICMP_REDIRECT_NET: 1450 (void)printf("Redirect Network"); 1451 break; 1452 case ICMP_REDIRECT_HOST: 1453 (void)printf("Redirect Host"); 1454 break; 1455 case ICMP_REDIRECT_TOSNET: 1456 (void)printf("Redirect Type of Service and Network"); 1457 break; 1458 case ICMP_REDIRECT_TOSHOST: 1459 (void)printf("Redirect Type of Service and Host"); 1460 break; 1461 default: 1462 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1463 break; 1464 } 1465 (void)printf(" New router addr: %s", 1466 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1467 pr_retip(icp, cc); 1468 break; 1469 1470 case ICMP_ECHO: 1471 if (!ck_pr_icmph(icp, from, cc, 0)) 1472 return 0; 1473 (void)printf("Echo Request: ID=%d seq=%d", 1474 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1475 break; 1476 1477 case ICMP_ECHOREPLY: 1478 /* displaying other's pings is too noisey */ 1479 #if 0 1480 if (!ck_pr_icmph(icp, from, cc, 0)) 1481 return 0; 1482 (void)printf("Echo Reply: ID=%d seq=%d", 1483 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1484 break; 1485 #else 1486 return 0; 1487 #endif 1488 1489 case ICMP_ROUTERADVERT: 1490 if (!ck_pr_icmph(icp, from, cc, 0)) 1491 return 0; 1492 (void)printf("Router Discovery Advert"); 1493 break; 1494 1495 case ICMP_ROUTERSOLICIT: 1496 if (!ck_pr_icmph(icp, from, cc, 0)) 1497 return 0; 1498 (void)printf("Router Discovery Solicit"); 1499 break; 1500 1501 case ICMP_TIMXCEED: 1502 if (!ck_pr_icmph(icp, from, cc, 1)) 1503 return 0; 1504 switch (icp->icmp_code ) { 1505 case ICMP_TIMXCEED_INTRANS: 1506 (void)printf("Time To Live exceeded"); 1507 break; 1508 case ICMP_TIMXCEED_REASS: 1509 (void)printf("Frag reassembly time exceeded"); 1510 break; 1511 default: 1512 (void)printf("Time exceeded, Bad Code: %d", 1513 icp->icmp_code); 1514 break; 1515 } 1516 pr_retip(icp, cc); 1517 break; 1518 1519 case ICMP_PARAMPROB: 1520 if (!ck_pr_icmph(icp, from, cc, 1)) 1521 return 0; 1522 (void)printf("Parameter problem: pointer = 0x%02x", 1523 icp->icmp_hun.ih_pptr); 1524 pr_retip(icp, cc); 1525 break; 1526 1527 case ICMP_TSTAMP: 1528 if (!ck_pr_icmph(icp, from, cc, 0)) 1529 return 0; 1530 (void)printf("Timestamp"); 1531 break; 1532 1533 case ICMP_TSTAMPREPLY: 1534 if (!ck_pr_icmph(icp, from, cc, 0)) 1535 return 0; 1536 (void)printf("Timestamp Reply"); 1537 break; 1538 1539 case ICMP_IREQ: 1540 if (!ck_pr_icmph(icp, from, cc, 0)) 1541 return 0; 1542 (void)printf("Information Request"); 1543 break; 1544 1545 case ICMP_IREQREPLY: 1546 if (!ck_pr_icmph(icp, from, cc, 0)) 1547 return 0; 1548 (void)printf("Information Reply"); 1549 break; 1550 1551 case ICMP_MASKREQ: 1552 if (!ck_pr_icmph(icp, from, cc, 0)) 1553 return 0; 1554 (void)printf("Address Mask Request"); 1555 break; 1556 1557 case ICMP_MASKREPLY: 1558 if (!ck_pr_icmph(icp, from, cc, 0)) 1559 return 0; 1560 (void)printf("Address Mask Reply"); 1561 break; 1562 1563 default: 1564 if (!ck_pr_icmph(icp, from, cc, 0)) 1565 return 0; 1566 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1567 if (pingflags & F_VERBOSE) 1568 pr_iph(icp, cc); 1569 } 1570 1571 return 1; 1572 } 1573 1574 1575 /* 1576 * Print an IP header with options. 1577 */ 1578 static void 1579 pr_iph(struct icmp *icp, 1580 int cc) 1581 { 1582 int hlen; 1583 u_char *cp; 1584 struct ip ipb, *ip = &ipb; 1585 1586 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1587 1588 hlen = ip->ip_hl << 2; 1589 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1590 1591 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1592 (void)printf(" %1x %1x %02x %04x %04x", 1593 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1594 (void)printf(" %1x %04x", 1595 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1596 (void)printf(" %02x %02x %04x", 1597 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1598 (void)printf(" %15s ", 1599 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1600 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1601 /* dump any option bytes */ 1602 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1603 (void)printf("%02x", *cp++); 1604 } 1605 } 1606 1607 /* 1608 * Print an ASCII host address starting from a string of bytes. 1609 */ 1610 static void 1611 pr_saddr(char *pat, 1612 u_char *cp) 1613 { 1614 n_long l; 1615 struct in_addr addr; 1616 1617 l = (u_char)*++cp; 1618 l = (l<<8) + (u_char)*++cp; 1619 l = (l<<8) + (u_char)*++cp; 1620 l = (l<<8) + (u_char)*++cp; 1621 addr.s_addr = htonl(l); 1622 (void)printf(pat, (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1623 } 1624 1625 1626 /* 1627 * Return an ASCII host address 1628 * as a dotted quad and optionally with a hostname 1629 */ 1630 static char * 1631 pr_addr(struct in_addr *addr) /* in network order */ 1632 { 1633 struct hostent *hp; 1634 static char buf[MAXHOSTNAMELEN+4+16+1]; 1635 1636 if ((pingflags & F_NUMERIC) 1637 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1638 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1639 } else { 1640 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1641 inet_ntoa(*addr)); 1642 } 1643 1644 return buf; 1645 } 1646 1647 /* 1648 * Dump some info on a returned (via ICMP) IP packet. 1649 */ 1650 static void 1651 pr_retip(struct icmp *icp, 1652 int cc) 1653 { 1654 int hlen; 1655 u_char *cp; 1656 struct ip ipb, *ip = &ipb; 1657 1658 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1659 1660 if (pingflags & F_VERBOSE) 1661 pr_iph(icp, cc); 1662 1663 hlen = ip->ip_hl << 2; 1664 cp = (u_char *) &icp->icmp_data[hlen]; 1665 1666 if (ip->ip_p == IPPROTO_TCP) { 1667 if (pingflags & F_VERBOSE) 1668 (void)printf("\n TCP: from port %u, to port %u", 1669 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1670 } else if (ip->ip_p == IPPROTO_UDP) { 1671 if (pingflags & F_VERBOSE) 1672 (void)printf("\n UDP: from port %u, to port %u", 1673 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1674 } else if (ip->ip_p == IPPROTO_ICMP) { 1675 struct icmp icp2; 1676 (void) memcpy(&icp2, cp, sizeof(icp2)); 1677 if (icp2.icmp_type == ICMP_ECHO) { 1678 if (pingflags & F_VERBOSE) 1679 (void)printf("\n ID=%u icmp_seq=%u", 1680 ntohs((u_short)icp2.icmp_id), 1681 ntohs((u_short)icp2.icmp_seq)); 1682 else 1683 (void)printf(" for icmp_seq=%u", 1684 ntohs((u_short)icp2.icmp_seq)); 1685 } 1686 } 1687 } 1688 1689 static void 1690 fill(void) 1691 { 1692 int i, j, k; 1693 char *cp; 1694 int pat[16]; 1695 1696 for (cp = fill_pat; *cp != '\0'; cp++) { 1697 if (!isxdigit((unsigned char)*cp)) 1698 break; 1699 } 1700 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1701 (void)fflush(stdout); 1702 errx(1, "\"-p %s\": patterns must be specified with" 1703 " 1-32 hex digits\n", 1704 fill_pat); 1705 } 1706 1707 i = sscanf(fill_pat, 1708 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1709 &pat[0], &pat[1], &pat[2], &pat[3], 1710 &pat[4], &pat[5], &pat[6], &pat[7], 1711 &pat[8], &pat[9], &pat[10], &pat[11], 1712 &pat[12], &pat[13], &pat[14], &pat[15]); 1713 1714 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1715 opack_icmp.icmp_data[k] = pat[j]; 1716 if (++j >= i) 1717 j = 0; 1718 } 1719 1720 if (!(pingflags & F_QUIET)) { 1721 (void)printf("PATTERN: 0x"); 1722 for (j=0; j<i; j++) 1723 (void)printf("%02x", 1724 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1725 (void)printf("\n"); 1726 } 1727 1728 } 1729 1730 1731 static void 1732 rnd_fill(void) 1733 { 1734 static u_int32_t rnd; 1735 int i; 1736 1737 for (i = PHDR_LEN; i < datalen; i++) { 1738 rnd = (3141592621U * rnd + 663896637U); 1739 opack_icmp.icmp_data[i] = rnd>>24; 1740 } 1741 } 1742 1743 1744 static void 1745 gethost(const char *arg, 1746 const char *name, 1747 struct sockaddr_in *sa, 1748 char *realname, 1749 int realname_len) 1750 { 1751 struct hostent *hp; 1752 1753 (void)memset(sa, 0, sizeof(*sa)); 1754 sa->sin_family = AF_INET; 1755 1756 /* If it is an IP address, try to convert it to a name to 1757 * have something nice to display. 1758 */ 1759 if (inet_aton(name, &sa->sin_addr) != 0) { 1760 if (realname) { 1761 if (pingflags & F_NUMERIC) 1762 hp = 0; 1763 else 1764 hp = gethostbyaddr((char *)&sa->sin_addr, 1765 sizeof(sa->sin_addr), 1766 AF_INET); 1767 (void)strncpy(realname, hp ? hp->h_name : name, 1768 realname_len); 1769 realname[realname_len-1] = '\0'; 1770 } 1771 return; 1772 } 1773 1774 hp = gethostbyname(name); 1775 if (!hp) 1776 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1777 1778 if (hp->h_addrtype != AF_INET) 1779 errx(1, "%s only supported with IP", arg); 1780 1781 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1782 1783 if (realname) { 1784 (void)strncpy(realname, hp->h_name, realname_len); 1785 realname[realname_len-1] = '\0'; 1786 } 1787 } 1788 1789 1790 static void 1791 usage(void) 1792 { 1793 #ifdef IPSEC 1794 #ifdef IPSEC_POLICY_IPSEC 1795 #define IPSECOPT "\n [-E policy] " 1796 #else 1797 #define IPSECOPT "\n [-AE] " 1798 #endif /*IPSEC_POLICY_IPSEC*/ 1799 #else 1800 #define IPSECOPT "" 1801 #endif /*IPSEC*/ 1802 1803 (void)fprintf(stderr, "Usage: \n" 1804 "%s [-dDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1805 " [-i interval] [-I addr]\n" 1806 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1807 " [-w maxwait] " IPSECOPT "host\n", 1808 __progname); 1809 exit(1); 1810 } 1811
Indexes created Tue Sep 30 20:09:53 GMT 2025