ping.c revision 1.53
1 /* $NetBSD: ping.c,v 1.53 1999/07/04 15:24:35 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 1.53 1999/07/04 15:24:35 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, "ipsec policy cannot be configured"); 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 #if 0 560 warnx("ipsec is not configured"); 561 #else 562 /* ignore it, should be okay */ 563 #endif 564 } 565 free(buf); 566 } 567 #else 568 { 569 int optval; 570 if (pingflags & F_AUTHHDR) { 571 optval = IPSEC_LEVEL_REQUIRE; 572 #ifdef IP_AUTH_TRANS_LEVEL 573 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 574 (char *)&optval, sizeof(optval)); 575 #else 576 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 577 (char *)&optval, sizeof(optval)); 578 #endif 579 } 580 if (pingflags & F_ENCRYPT) { 581 optval = IPSEC_LEVEL_REQUIRE; 582 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 583 (char *)&optval, sizeof(optval)); 584 } 585 optval = IPSEC_LEVEL_BYPASS; 586 #ifdef IP_AUTH_TRANS_LEVEL 587 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 588 (char *)&optval, sizeof(optval)); 589 #else 590 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 591 (char *)&optval, sizeof(optval)); 592 #endif 593 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 594 (char *)&optval, sizeof(optval)); 595 } 596 #endif /*IPSEC_POLICY_IPSEC*/ 597 #endif /*IPSEC*/ 598 599 (void)printf("PING %s (%s): %d data bytes\n", hostname, 600 inet_ntoa(whereto.sin_addr), datalen); 601 602 /* When pinging the broadcast address, you can get a lot 603 * of answers. Doing something so evil is useful if you 604 * are trying to stress the ethernet, or just want to 605 * fill the arp cache to get some stuff for /etc/ethers. 606 */ 607 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 608 (char*)&bufspace, sizeof(bufspace))) { 609 if ((bufspace -= 4096) == 0) 610 err(1, "Cannot set the receive buffer size"); 611 } 612 613 /* make it possible to send giant probes, but do not worry now 614 * if it fails, since we probably won't send giant probes. 615 */ 616 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 617 (char*)&bufspace, sizeof(bufspace)); 618 619 (void)signal(SIGINT, prefinish); 620 621 #if defined(SIGINFO) && defined(NOKERNINFO) 622 if (tcgetattr (0, &ts) != -1) { 623 reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 624 ts.c_lflag |= NOKERNINFO; 625 tcsetattr (STDIN_FILENO, TCSANOW, &ts); 626 } 627 #endif 628 629 #ifdef SIGINFO 630 (void)signal(SIGINFO, prtsig); 631 #else 632 (void)signal(SIGQUIT, prtsig); 633 #endif 634 (void)signal(SIGCONT, prtsig); 635 636 /* fire off them quickies */ 637 for (i = 0; i < preload; i++) { 638 (void)gettimeofday(&now, 0); 639 pinger(); 640 } 641 642 doit(); 643 return 0; 644 } 645 646 647 static void 648 doit(void) 649 { 650 int cc; 651 struct sockaddr_in from; 652 int fromlen; 653 double sec, last, d_last; 654 struct timeval timeout; 655 fd_set fdmask; 656 657 658 (void)gettimeofday(&clear_cache,0); 659 if (maxwait != 0) { 660 last = timeval_to_sec(&clear_cache) + maxwait; 661 d_last = 0; 662 } else { 663 last = 0; 664 d_last = 365*24*60*60; 665 } 666 667 FD_ZERO(&fdmask); 668 do { 669 (void)gettimeofday(&now,0); 670 671 if (last != 0) 672 d_last = last - timeval_to_sec(&now); 673 674 if (ntransmitted < npackets && d_last > 0) { 675 /* send if within 100 usec or late for next packet */ 676 sec = diffsec(&next_tx,&now); 677 if (sec <= 0.0001 678 || (lastrcvd && (pingflags & F_FLOOD))) { 679 pinger(); 680 sec = diffsec(&next_tx,&now); 681 } 682 if (sec < 0.0) 683 sec = 0.0; 684 if (d_last < sec) 685 sec = d_last; 686 687 } else { 688 /* For the last response, wait twice as long as the 689 * worst case seen, or 10 times as long as the 690 * maximum interpacket interval, whichever is longer. 691 */ 692 sec = MAX(2*tmax,10*interval) - diffsec(&now,&last_tx); 693 if (d_last < sec) 694 sec = d_last; 695 if (sec <= 0) 696 break; 697 } 698 699 700 sec_to_timeval(sec, &timeout); 701 702 FD_SET(s, &fdmask); 703 cc = select(s+1, &fdmask, 0, 0, &timeout); 704 if (cc <= 0) { 705 if (cc < 0) { 706 if (errno == EINTR) 707 continue; 708 jiggle_flush(1); 709 err(1, "select"); 710 } 711 continue; 712 } 713 714 fromlen = sizeof(from); 715 cc = recvfrom(s, (char *) packet, packlen, 716 0, (struct sockaddr *)&from, 717 &fromlen); 718 if (cc < 0) { 719 if (errno != EINTR) { 720 jiggle_flush(1); 721 warn("recvfrom"); 722 (void)fflush(stderr); 723 } 724 continue; 725 } 726 (void)gettimeofday(&now, 0); 727 pr_pack(packet, cc, &from); 728 729 } while (nreceived < npackets 730 && (nreceived == 0 || !(pingflags & F_ONCE))); 731 732 finish(0); 733 } 734 735 736 static void 737 jiggle_flush(int nl) /* new line if there are dots */ 738 { 739 int serrno = errno; 740 741 if (jiggle_cnt > 0) { 742 total_jiggled += jiggle_cnt; 743 jiggle_direction = 1; 744 do { 745 (void)putchar('.'); 746 } while (--jiggle_cnt > 0); 747 748 } else if (jiggle_cnt < 0) { 749 total_jiggled -= jiggle_cnt; 750 jiggle_direction = -1; 751 do { 752 (void)putchar('\b'); 753 } while (++jiggle_cnt < 0); 754 } 755 756 if (nl) { 757 if (total_jiggled != 0) 758 (void)putchar('\n'); 759 total_jiggled = 0; 760 jiggle_direction = -1; 761 } 762 763 (void)fflush(stdout); 764 (void)fflush(stderr); 765 jiggle_time = now; 766 errno = serrno; 767 } 768 769 770 /* jiggle the cursor for flood-ping 771 */ 772 static void 773 jiggle(int delta) 774 { 775 double dt; 776 777 if (pingflags & F_QUIET) 778 return; 779 780 /* do not back up into messages */ 781 if (total_jiggled+jiggle_cnt+delta < 0) 782 return; 783 784 jiggle_cnt += delta; 785 786 /* flush the FLOOD dots when things are quiet 787 * or occassionally to make the cursor jiggle. 788 */ 789 dt = diffsec(&last_tx, &jiggle_time); 790 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 791 jiggle_flush(0); 792 } 793 794 795 /* 796 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 797 * will be added on by the kernel. The ID field is our UNIX process ID, 798 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 799 * of the data portion are used to hold a UNIX "timeval" struct in VAX 800 * byte-order, to compute the round-trip time. 801 */ 802 static void 803 pinger(void) 804 { 805 int i, cc, sw; 806 807 opack_icmp.icmp_code = 0; 808 opack_icmp.icmp_seq = htons((u_short)(ntransmitted)); 809 810 /* clear the cached route in the kernel after an ICMP 811 * response such as a Redirect is seen to stop causing 812 * more such packets. Also clear the cached route 813 * periodically in case of routing changes that make 814 * black holes come and go. 815 */ 816 if (clear_cache.tv_sec != now.tv_sec) { 817 opack_icmp.icmp_type = ICMP_ECHOREPLY; 818 opack_icmp.icmp_id = ~ident; 819 opack_icmp.icmp_cksum = 0; 820 opack_icmp.icmp_cksum = in_cksum((u_short*)&opack_icmp, 821 PHDR_LEN); 822 sw = 0; 823 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 824 (char *)&sw,sizeof(sw)) < 0) 825 err(1, "Can't turn off special IP header"); 826 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 827 (struct sockaddr *)&loc_addr, 828 sizeof(struct sockaddr_in)) < 0) { 829 /* 830 * XXX: we only report this as a warning in verbose 831 * mode because people get confused when they see 832 * this error when they are running in single user 833 * mode and they have not configured lo0 834 */ 835 if (pingflags & F_VERBOSE) 836 warn("failed to clear cached route"); 837 } 838 sw = 1; 839 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 840 (char *)&sw, sizeof(sw)) < 0) 841 err(1, "Can't set special IP header"); 842 843 (void)gettimeofday(&clear_cache,0); 844 } 845 846 opack_icmp.icmp_type = ICMP_ECHO; 847 opack_icmp.icmp_id = ident; 848 if (pingflags & F_TIMING) 849 (void) memcpy(&opack_icmp.icmp_data[0], &now, sizeof(now)); 850 cc = datalen+PHDR_LEN; 851 opack_icmp.icmp_cksum = 0; 852 opack_icmp.icmp_cksum = in_cksum((u_short*)&opack_icmp, cc); 853 854 cc += opack_ip->ip_hl<<2; 855 opack_ip->ip_len = cc; 856 i = sendto(s, (char *) opack_ip, cc, 0, 857 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 858 if (i != cc) { 859 jiggle_flush(1); 860 if (i < 0) 861 warn("sendto"); 862 else 863 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 864 (void)fflush(stderr); 865 } 866 lastrcvd = 0; 867 868 CLR(ntransmitted); 869 ntransmitted++; 870 871 last_tx = now; 872 if (next_tx.tv_sec == 0) { 873 first_tx = now; 874 next_tx = now; 875 } 876 877 /* Transmit regularly, at always the same microsecond in the 878 * second when going at one packet per second. 879 * If we are at most 100 ms behind, send extras to get caught up. 880 * Otherwise, skip packets we were too slow to send. 881 */ 882 if (diffsec(&next_tx, &now) <= interval) { 883 do { 884 timevaladd(&next_tx, &interval_tv); 885 } while (diffsec(&next_tx, &now) < -0.1); 886 } 887 888 if (pingflags & F_FLOOD) 889 jiggle(1); 890 891 /* While the packet is going out, ready buffer for the next 892 * packet. Use a fast but not very good random number generator. 893 */ 894 if (pingflags & F_PING_RANDOM) 895 rnd_fill(); 896 } 897 898 899 static void 900 pr_pack_sub(int cc, 901 char *addr, 902 int seqno, 903 int dupflag, 904 int ttl, 905 double triptime) 906 { 907 jiggle_flush(1); 908 909 if (pingflags & F_FLOOD) 910 return; 911 912 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 913 if (dupflag) 914 (void)printf(" DUP!"); 915 (void)printf(" ttl=%d", ttl); 916 if (pingflags & F_TIMING) 917 (void)printf(" time=%.3f ms", triptime*1000.0); 918 919 /* 920 * Send beep to stderr, since that's more likely than stdout 921 * to go to a terminal.. 922 */ 923 if (pingflags & F_AUDIBLE && !dupflag) 924 (void)fprintf(stderr,"\a"); 925 } 926 927 928 /* 929 * Print out the packet, if it came from us. This logic is necessary 930 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 931 * which arrive ('tis only fair). This permits multiple copies of this 932 * program to be run without having intermingled output (or statistics!). 933 */ 934 static void 935 pr_pack(u_char *buf, 936 int tot_len, 937 struct sockaddr_in *from) 938 { 939 struct ip *ip; 940 struct icmp *icp; 941 int i, j, net_len; 942 u_char *cp; 943 static int old_rrlen; 944 static char old_rr[MAX_IPOPTLEN]; 945 int hlen, dupflag = 0, dumped; 946 double triptime = 0.0; 947 #define PR_PACK_SUB() {if (!dumped) { \ 948 dumped = 1; \ 949 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 950 ntohs((u_short)icp->icmp_seq), \ 951 dupflag, ip->ip_ttl, triptime);}} 952 953 /* Check the IP header */ 954 ip = (struct ip *) buf; 955 hlen = ip->ip_hl << 2; 956 if (tot_len < hlen + ICMP_MINLEN) { 957 if (pingflags & F_VERBOSE) { 958 jiggle_flush(1); 959 (void)printf("packet too short (%d bytes) from %s\n", 960 tot_len, inet_ntoa(from->sin_addr)); 961 } 962 return; 963 } 964 965 /* Now the ICMP part */ 966 dumped = 0; 967 net_len = tot_len - hlen; 968 icp = (struct icmp *)(buf + hlen); 969 if (icp->icmp_type == ICMP_ECHOREPLY 970 && icp->icmp_id == ident) { 971 if (icp->icmp_seq == htons((u_short)(ntransmitted-1))) 972 lastrcvd = 1; 973 last_rx = now; 974 if (first_rx.tv_sec == 0) 975 first_rx = last_rx; 976 nreceived++; 977 if (pingflags & F_TIMING) { 978 struct timeval tv; 979 (void) memcpy(&tv, icp->icmp_data, sizeof(tv)); 980 triptime = diffsec(&last_rx, &tv); 981 tsum += triptime; 982 tsumsq += triptime * triptime; 983 if (triptime < tmin) 984 tmin = triptime; 985 if (triptime > tmax) 986 tmax = triptime; 987 } 988 989 if (TST(ntohs((u_short)icp->icmp_seq))) { 990 nrepeats++, nreceived--; 991 dupflag=1; 992 } else { 993 SET(ntohs((u_short)icp->icmp_seq)); 994 } 995 996 if (tot_len != opack_ip->ip_len) { 997 PR_PACK_SUB(); 998 (void)printf("\nwrong total length %d instead of %d", 999 tot_len, opack_ip->ip_len); 1000 } 1001 1002 if (pingflags & F_QUIET) 1003 return; 1004 1005 if (!(pingflags & F_FLOOD)) 1006 PR_PACK_SUB(); 1007 1008 /* check the data */ 1009 if (datalen > PHDR_LEN 1010 && !(pingflags & F_PING_RANDOM) 1011 && memcmp(&icp->icmp_data[PHDR_LEN], 1012 &opack_icmp.icmp_data[PHDR_LEN], 1013 datalen-PHDR_LEN)) { 1014 for (i=PHDR_LEN; i<datalen; i++) { 1015 if (icp->icmp_data[PHDR_LEN+i] 1016 != opack_icmp.icmp_data[PHDR_LEN+i]) 1017 break; 1018 } 1019 PR_PACK_SUB(); 1020 (void)printf("\nwrong data byte #%d should have been" 1021 " %#x but was %#x", 1022 i, (u_char)opack_icmp.icmp_data[i], 1023 (u_char)icp->icmp_data[i]); 1024 for (i=PHDR_LEN; i<datalen; i++) { 1025 if ((i%16) == PHDR_LEN) 1026 (void)printf("\n\t"); 1027 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1028 } 1029 } 1030 1031 } else { 1032 if (!pr_icmph(icp, from, net_len)) 1033 return; 1034 dumped = 2; 1035 } 1036 1037 /* Display any IP options */ 1038 cp = buf + sizeof(struct ip); 1039 while (hlen > (int)sizeof(struct ip)) { 1040 switch (*cp) { 1041 case IPOPT_EOL: 1042 hlen = 0; 1043 break; 1044 case IPOPT_LSRR: 1045 hlen -= 2; 1046 j = *++cp; 1047 ++cp; 1048 j -= IPOPT_MINOFF; 1049 if (j <= 0) 1050 continue; 1051 if (dumped <= 1) { 1052 j = ((j+3)/4)*4; 1053 hlen -= j; 1054 cp += j; 1055 break; 1056 } 1057 PR_PACK_SUB(); 1058 (void)printf("\nLSRR: "); 1059 for (;;) { 1060 pr_saddr("\t%s", cp); 1061 cp += 4; 1062 hlen -= 4; 1063 j -= 4; 1064 if (j <= 0) 1065 break; 1066 (void)putchar('\n'); 1067 } 1068 break; 1069 case IPOPT_RR: 1070 j = *++cp; /* get length */ 1071 i = *++cp; /* and pointer */ 1072 hlen -= 2; 1073 if (i > j) 1074 i = j; 1075 i -= IPOPT_MINOFF; 1076 if (i <= 0) 1077 continue; 1078 if (dumped <= 1) { 1079 if (i == old_rrlen 1080 && !memcmp(cp, old_rr, i)) { 1081 if (dumped) 1082 (void)printf("\t(same route)"); 1083 j = ((i+3)/4)*4; 1084 hlen -= j; 1085 cp += j; 1086 break; 1087 } 1088 old_rrlen = i; 1089 (void) memcpy(old_rr, cp, i); 1090 } 1091 if (!dumped) { 1092 jiggle_flush(1); 1093 (void)printf("RR: "); 1094 dumped = 1; 1095 } else { 1096 (void)printf("\nRR: "); 1097 } 1098 for (;;) { 1099 pr_saddr("\t%s", cp); 1100 cp += 4; 1101 hlen -= 4; 1102 i -= 4; 1103 if (i <= 0) 1104 break; 1105 (void)putchar('\n'); 1106 } 1107 break; 1108 case IPOPT_NOP: 1109 if (dumped <= 1) 1110 break; 1111 PR_PACK_SUB(); 1112 (void)printf("\nNOP"); 1113 break; 1114 #ifdef sgi 1115 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1116 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1117 case IPOPT_CIPSO: /* Commercial IPSO */ 1118 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1119 i = (unsigned)cp[1]; 1120 hlen -= i - 1; 1121 PR_PACK_SUB(); 1122 (void)printf("\nSEC:"); 1123 while (i--) { 1124 (void)printf(" %02x", *cp++); 1125 } 1126 cp--; 1127 break; 1128 } 1129 #endif 1130 default: 1131 PR_PACK_SUB(); 1132 (void)printf("\nunknown option 0x%x", *cp); 1133 break; 1134 } 1135 hlen--; 1136 cp++; 1137 } 1138 1139 if (dumped) { 1140 (void)putchar('\n'); 1141 (void)fflush(stdout); 1142 } else { 1143 jiggle(-1); 1144 } 1145 } 1146 1147 1148 /* Compute the IP checksum 1149 * This assumes the packet is less than 32K long. 1150 */ 1151 static u_short 1152 in_cksum(u_short *p, 1153 u_int len) 1154 { 1155 u_int sum = 0; 1156 int nwords = len >> 1; 1157 1158 while (nwords-- != 0) 1159 sum += *p++; 1160 1161 if (len & 1) { 1162 union { 1163 u_short w; 1164 u_char c[2]; 1165 } u; 1166 u.c[0] = *(u_char *)p; 1167 u.c[1] = 0; 1168 sum += u.w; 1169 } 1170 1171 /* end-around-carry */ 1172 sum = (sum >> 16) + (sum & 0xffff); 1173 sum += (sum >> 16); 1174 return (~sum); 1175 } 1176 1177 1178 /* 1179 * compute the difference of two timevals in seconds 1180 */ 1181 static double 1182 diffsec(struct timeval *now, 1183 struct timeval *then) 1184 { 1185 return ((now->tv_sec - then->tv_sec)*1.0 1186 + (now->tv_usec - then->tv_usec)/1000000.0); 1187 } 1188 1189 1190 static void 1191 timevaladd(struct timeval *t1, 1192 struct timeval *t2) 1193 { 1194 1195 t1->tv_sec += t2->tv_sec; 1196 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1197 t1->tv_sec++; 1198 t1->tv_usec -= 1000000; 1199 } 1200 } 1201 1202 1203 static void 1204 sec_to_timeval(const double sec, struct timeval *tp) 1205 { 1206 tp->tv_sec = sec; 1207 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1208 } 1209 1210 1211 static double 1212 timeval_to_sec(const struct timeval *tp) 1213 { 1214 return tp->tv_sec + tp->tv_usec / 1000000.0; 1215 } 1216 1217 1218 /* 1219 * Print statistics. 1220 * Heavily buffered STDIO is used here, so that all the statistics 1221 * will be written with 1 sys-write call. This is nice when more 1222 * than one copy of the program is running on a terminal; it prevents 1223 * the statistics output from becomming intermingled. 1224 */ 1225 static void 1226 summary(int header) 1227 { 1228 jiggle_flush(1); 1229 1230 if (header) 1231 (void)printf("\n----%s PING Statistics----\n", hostname); 1232 (void)printf("%d packets transmitted, ", ntransmitted); 1233 (void)printf("%d packets received, ", nreceived); 1234 if (nrepeats) 1235 (void)printf("+%d duplicates, ", nrepeats); 1236 if (ntransmitted) { 1237 if (nreceived > ntransmitted) 1238 (void)printf("-- somebody's printing up packets!"); 1239 else 1240 (void)printf("%.1f%% packet loss", 1241 (((ntransmitted-nreceived)*100.0) / 1242 ntransmitted)); 1243 } 1244 (void)printf("\n"); 1245 if (nreceived && (pingflags & F_TIMING)) { 1246 double n = nreceived + nrepeats; 1247 double avg = (tsum / n); 1248 double variance = 0.0; 1249 if (n>1) 1250 variance = (tsumsq - n*avg*avg) /(n-1); 1251 1252 printf("round-trip min/avg/max/stddev = " 1253 "%.3f/%.3f/%.3f/%.3f ms\n", 1254 tmin * 1000.0, avg * 1000.0, 1255 tmax * 1000.0, sqrt(variance) * 1000.0); 1256 if (pingflags & F_FLOOD) { 1257 double r = diffsec(&last_rx, &first_rx); 1258 double t = diffsec(&last_tx, &first_tx); 1259 if (r == 0) 1260 r = 0.0001; 1261 if (t == 0) 1262 t = 0.0001; 1263 (void)printf(" %.1f packets/sec sent, " 1264 " %.1f packets/sec received\n", 1265 ntransmitted/t, nreceived/r); 1266 } 1267 } 1268 } 1269 1270 1271 /* 1272 * Print statistics when SIGINFO is received. 1273 */ 1274 /* ARGSUSED */ 1275 static void 1276 prtsig(int s) 1277 { 1278 summary(0); 1279 #ifdef SIGINFO 1280 (void)signal(SIGINFO, prtsig); 1281 #else 1282 (void)signal(SIGQUIT, prtsig); 1283 #endif 1284 } 1285 1286 1287 /* 1288 * On the first SIGINT, allow any outstanding packets to dribble in 1289 */ 1290 static void 1291 prefinish(int s) 1292 { 1293 if (lastrcvd /* quit now if caught up */ 1294 || nreceived == 0) /* or if remote is dead */ 1295 finish(0); 1296 1297 (void)signal(s, finish); /* do this only the 1st time */ 1298 1299 if (npackets > ntransmitted) /* let the normal limit work */ 1300 npackets = ntransmitted; 1301 } 1302 1303 1304 /* 1305 * Print statistics and give up. 1306 */ 1307 /* ARGSUSED */ 1308 static void 1309 finish(int s) 1310 { 1311 #if defined(SIGINFO) && defined(NOKERNINFO) 1312 struct termios ts; 1313 1314 if (reset_kerninfo && tcgetattr (0, &ts) != -1) { 1315 ts.c_lflag &= ~NOKERNINFO; 1316 tcsetattr (STDIN_FILENO, TCSANOW, &ts); 1317 } 1318 (void)signal(SIGINFO, SIG_IGN); 1319 #else 1320 (void)signal(SIGQUIT, SIG_DFL); 1321 #endif 1322 1323 summary(1); 1324 exit(nreceived > 0 ? 0 : 2); 1325 } 1326 1327 1328 static int /* 0=do not print it */ 1329 ck_pr_icmph(struct icmp *icp, 1330 struct sockaddr_in *from, 1331 int cc, 1332 int override) /* 1=override VERBOSE if interesting */ 1333 { 1334 int hlen; 1335 struct ip ipb, *ip = &ipb; 1336 struct icmp icp2b, *icp2 = &icp2b; 1337 int res; 1338 1339 if (pingflags & F_VERBOSE) { 1340 res = 1; 1341 jiggle_flush(1); 1342 } else { 1343 res = 0; 1344 } 1345 1346 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1347 hlen = ip->ip_hl << 2; 1348 if (ip->ip_p == IPPROTO_ICMP 1349 && hlen + 6 <= cc) { 1350 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1351 if (icp2->icmp_id == ident) { 1352 /* remember to clear route cached in kernel 1353 * if this non-Echo-Reply ICMP message was for one 1354 * of our packets. 1355 */ 1356 clear_cache.tv_sec = 0; 1357 1358 if (!res && override 1359 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1360 jiggle_flush(1); 1361 (void)printf("%d bytes from %s: ", 1362 cc, pr_addr(&from->sin_addr)); 1363 res = 1; 1364 } 1365 } 1366 } 1367 1368 return res; 1369 } 1370 1371 1372 /* 1373 * Print a descriptive string about an ICMP header other than an echo reply. 1374 */ 1375 static int /* 0=printed nothing */ 1376 pr_icmph(struct icmp *icp, 1377 struct sockaddr_in *from, 1378 int cc) 1379 { 1380 switch (icp->icmp_type ) { 1381 case ICMP_UNREACH: 1382 if (!ck_pr_icmph(icp, from, cc, 1)) 1383 return 0; 1384 switch (icp->icmp_code) { 1385 case ICMP_UNREACH_NET: 1386 (void)printf("Destination Net Unreachable"); 1387 break; 1388 case ICMP_UNREACH_HOST: 1389 (void)printf("Destination Host Unreachable"); 1390 break; 1391 case ICMP_UNREACH_PROTOCOL: 1392 (void)printf("Destination Protocol Unreachable"); 1393 break; 1394 case ICMP_UNREACH_PORT: 1395 (void)printf("Destination Port Unreachable"); 1396 break; 1397 case ICMP_UNREACH_NEEDFRAG: 1398 (void)printf("frag needed and DF set. Next MTU=%d", 1399 ntohs(icp->icmp_nextmtu)); 1400 break; 1401 case ICMP_UNREACH_SRCFAIL: 1402 (void)printf("Source Route Failed"); 1403 break; 1404 case ICMP_UNREACH_NET_UNKNOWN: 1405 (void)printf("Unreachable unknown net"); 1406 break; 1407 case ICMP_UNREACH_HOST_UNKNOWN: 1408 (void)printf("Unreachable unknown host"); 1409 break; 1410 case ICMP_UNREACH_ISOLATED: 1411 (void)printf("Unreachable host isolated"); 1412 break; 1413 case ICMP_UNREACH_NET_PROHIB: 1414 (void)printf("Net prohibited access"); 1415 break; 1416 case ICMP_UNREACH_HOST_PROHIB: 1417 (void)printf("Host prohibited access"); 1418 break; 1419 case ICMP_UNREACH_TOSNET: 1420 (void)printf("Bad TOS for net"); 1421 break; 1422 case ICMP_UNREACH_TOSHOST: 1423 (void)printf("Bad TOS for host"); 1424 break; 1425 case 13: 1426 (void)printf("Communication prohibited"); 1427 break; 1428 case 14: 1429 (void)printf("Host precedence violation"); 1430 break; 1431 case 15: 1432 (void)printf("Precedence cutoff"); 1433 break; 1434 default: 1435 (void)printf("Bad Destination Unreachable Code: %d", 1436 icp->icmp_code); 1437 break; 1438 } 1439 /* Print returned IP header information */ 1440 pr_retip(icp, cc); 1441 break; 1442 1443 case ICMP_SOURCEQUENCH: 1444 if (!ck_pr_icmph(icp, from, cc, 1)) 1445 return 0; 1446 (void)printf("Source Quench"); 1447 pr_retip(icp, cc); 1448 break; 1449 1450 case ICMP_REDIRECT: 1451 if (!ck_pr_icmph(icp, from, cc, 1)) 1452 return 0; 1453 switch (icp->icmp_code) { 1454 case ICMP_REDIRECT_NET: 1455 (void)printf("Redirect Network"); 1456 break; 1457 case ICMP_REDIRECT_HOST: 1458 (void)printf("Redirect Host"); 1459 break; 1460 case ICMP_REDIRECT_TOSNET: 1461 (void)printf("Redirect Type of Service and Network"); 1462 break; 1463 case ICMP_REDIRECT_TOSHOST: 1464 (void)printf("Redirect Type of Service and Host"); 1465 break; 1466 default: 1467 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1468 break; 1469 } 1470 (void)printf(" New router addr: %s", 1471 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1472 pr_retip(icp, cc); 1473 break; 1474 1475 case ICMP_ECHO: 1476 if (!ck_pr_icmph(icp, from, cc, 0)) 1477 return 0; 1478 (void)printf("Echo Request: ID=%d seq=%d", 1479 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1480 break; 1481 1482 case ICMP_ECHOREPLY: 1483 /* displaying other's pings is too noisey */ 1484 #if 0 1485 if (!ck_pr_icmph(icp, from, cc, 0)) 1486 return 0; 1487 (void)printf("Echo Reply: ID=%d seq=%d", 1488 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1489 break; 1490 #else 1491 return 0; 1492 #endif 1493 1494 case ICMP_ROUTERADVERT: 1495 if (!ck_pr_icmph(icp, from, cc, 0)) 1496 return 0; 1497 (void)printf("Router Discovery Advert"); 1498 break; 1499 1500 case ICMP_ROUTERSOLICIT: 1501 if (!ck_pr_icmph(icp, from, cc, 0)) 1502 return 0; 1503 (void)printf("Router Discovery Solicit"); 1504 break; 1505 1506 case ICMP_TIMXCEED: 1507 if (!ck_pr_icmph(icp, from, cc, 1)) 1508 return 0; 1509 switch (icp->icmp_code ) { 1510 case ICMP_TIMXCEED_INTRANS: 1511 (void)printf("Time To Live exceeded"); 1512 break; 1513 case ICMP_TIMXCEED_REASS: 1514 (void)printf("Frag reassembly time exceeded"); 1515 break; 1516 default: 1517 (void)printf("Time exceeded, Bad Code: %d", 1518 icp->icmp_code); 1519 break; 1520 } 1521 pr_retip(icp, cc); 1522 break; 1523 1524 case ICMP_PARAMPROB: 1525 if (!ck_pr_icmph(icp, from, cc, 1)) 1526 return 0; 1527 (void)printf("Parameter problem: pointer = 0x%02x", 1528 icp->icmp_hun.ih_pptr); 1529 pr_retip(icp, cc); 1530 break; 1531 1532 case ICMP_TSTAMP: 1533 if (!ck_pr_icmph(icp, from, cc, 0)) 1534 return 0; 1535 (void)printf("Timestamp"); 1536 break; 1537 1538 case ICMP_TSTAMPREPLY: 1539 if (!ck_pr_icmph(icp, from, cc, 0)) 1540 return 0; 1541 (void)printf("Timestamp Reply"); 1542 break; 1543 1544 case ICMP_IREQ: 1545 if (!ck_pr_icmph(icp, from, cc, 0)) 1546 return 0; 1547 (void)printf("Information Request"); 1548 break; 1549 1550 case ICMP_IREQREPLY: 1551 if (!ck_pr_icmph(icp, from, cc, 0)) 1552 return 0; 1553 (void)printf("Information Reply"); 1554 break; 1555 1556 case ICMP_MASKREQ: 1557 if (!ck_pr_icmph(icp, from, cc, 0)) 1558 return 0; 1559 (void)printf("Address Mask Request"); 1560 break; 1561 1562 case ICMP_MASKREPLY: 1563 if (!ck_pr_icmph(icp, from, cc, 0)) 1564 return 0; 1565 (void)printf("Address Mask Reply"); 1566 break; 1567 1568 default: 1569 if (!ck_pr_icmph(icp, from, cc, 0)) 1570 return 0; 1571 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1572 if (pingflags & F_VERBOSE) 1573 pr_iph(icp, cc); 1574 } 1575 1576 return 1; 1577 } 1578 1579 1580 /* 1581 * Print an IP header with options. 1582 */ 1583 static void 1584 pr_iph(struct icmp *icp, 1585 int cc) 1586 { 1587 int hlen; 1588 u_char *cp; 1589 struct ip ipb, *ip = &ipb; 1590 1591 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1592 1593 hlen = ip->ip_hl << 2; 1594 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1595 1596 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1597 (void)printf(" %1x %1x %02x %04x %04x", 1598 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1599 (void)printf(" %1x %04x", 1600 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1601 (void)printf(" %02x %02x %04x", 1602 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1603 (void)printf(" %15s ", 1604 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1605 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1606 /* dump any option bytes */ 1607 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1608 (void)printf("%02x", *cp++); 1609 } 1610 } 1611 1612 /* 1613 * Print an ASCII host address starting from a string of bytes. 1614 */ 1615 static void 1616 pr_saddr(char *pat, 1617 u_char *cp) 1618 { 1619 n_long l; 1620 struct in_addr addr; 1621 1622 l = (u_char)*++cp; 1623 l = (l<<8) + (u_char)*++cp; 1624 l = (l<<8) + (u_char)*++cp; 1625 l = (l<<8) + (u_char)*++cp; 1626 addr.s_addr = htonl(l); 1627 (void)printf(pat, (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1628 } 1629 1630 1631 /* 1632 * Return an ASCII host address 1633 * as a dotted quad and optionally with a hostname 1634 */ 1635 static char * 1636 pr_addr(struct in_addr *addr) /* in network order */ 1637 { 1638 struct hostent *hp; 1639 static char buf[MAXHOSTNAMELEN+4+16+1]; 1640 1641 if ((pingflags & F_NUMERIC) 1642 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1643 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1644 } else { 1645 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1646 inet_ntoa(*addr)); 1647 } 1648 1649 return buf; 1650 } 1651 1652 /* 1653 * Dump some info on a returned (via ICMP) IP packet. 1654 */ 1655 static void 1656 pr_retip(struct icmp *icp, 1657 int cc) 1658 { 1659 int hlen; 1660 u_char *cp; 1661 struct ip ipb, *ip = &ipb; 1662 1663 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1664 1665 if (pingflags & F_VERBOSE) 1666 pr_iph(icp, cc); 1667 1668 hlen = ip->ip_hl << 2; 1669 cp = (u_char *) &icp->icmp_data[hlen]; 1670 1671 if (ip->ip_p == IPPROTO_TCP) { 1672 if (pingflags & F_VERBOSE) 1673 (void)printf("\n TCP: from port %u, to port %u", 1674 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1675 } else if (ip->ip_p == IPPROTO_UDP) { 1676 if (pingflags & F_VERBOSE) 1677 (void)printf("\n UDP: from port %u, to port %u", 1678 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1679 } else if (ip->ip_p == IPPROTO_ICMP) { 1680 struct icmp icp2; 1681 (void) memcpy(&icp2, cp, sizeof(icp2)); 1682 if (icp2.icmp_type == ICMP_ECHO) { 1683 if (pingflags & F_VERBOSE) 1684 (void)printf("\n ID=%u icmp_seq=%u", 1685 ntohs((u_short)icp2.icmp_id), 1686 ntohs((u_short)icp2.icmp_seq)); 1687 else 1688 (void)printf(" for icmp_seq=%u", 1689 ntohs((u_short)icp2.icmp_seq)); 1690 } 1691 } 1692 } 1693 1694 static void 1695 fill(void) 1696 { 1697 int i, j, k; 1698 char *cp; 1699 int pat[16]; 1700 1701 for (cp = fill_pat; *cp != '\0'; cp++) { 1702 if (!isxdigit((unsigned char)*cp)) 1703 break; 1704 } 1705 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1706 (void)fflush(stdout); 1707 errx(1, "\"-p %s\": patterns must be specified with" 1708 " 1-32 hex digits\n", 1709 fill_pat); 1710 } 1711 1712 i = sscanf(fill_pat, 1713 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1714 &pat[0], &pat[1], &pat[2], &pat[3], 1715 &pat[4], &pat[5], &pat[6], &pat[7], 1716 &pat[8], &pat[9], &pat[10], &pat[11], 1717 &pat[12], &pat[13], &pat[14], &pat[15]); 1718 1719 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1720 opack_icmp.icmp_data[k] = pat[j]; 1721 if (++j >= i) 1722 j = 0; 1723 } 1724 1725 if (!(pingflags & F_QUIET)) { 1726 (void)printf("PATTERN: 0x"); 1727 for (j=0; j<i; j++) 1728 (void)printf("%02x", 1729 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1730 (void)printf("\n"); 1731 } 1732 1733 } 1734 1735 1736 static void 1737 rnd_fill(void) 1738 { 1739 static u_int32_t rnd; 1740 int i; 1741 1742 for (i = PHDR_LEN; i < datalen; i++) { 1743 rnd = (3141592621U * rnd + 663896637U); 1744 opack_icmp.icmp_data[i] = rnd>>24; 1745 } 1746 } 1747 1748 1749 static void 1750 gethost(const char *arg, 1751 const char *name, 1752 struct sockaddr_in *sa, 1753 char *realname, 1754 int realname_len) 1755 { 1756 struct hostent *hp; 1757 1758 (void)memset(sa, 0, sizeof(*sa)); 1759 sa->sin_family = AF_INET; 1760 1761 /* If it is an IP address, try to convert it to a name to 1762 * have something nice to display. 1763 */ 1764 if (inet_aton(name, &sa->sin_addr) != 0) { 1765 if (realname) { 1766 if (pingflags & F_NUMERIC) 1767 hp = 0; 1768 else 1769 hp = gethostbyaddr((char *)&sa->sin_addr, 1770 sizeof(sa->sin_addr), 1771 AF_INET); 1772 (void)strncpy(realname, hp ? hp->h_name : name, 1773 realname_len); 1774 realname[realname_len-1] = '\0'; 1775 } 1776 return; 1777 } 1778 1779 hp = gethostbyname(name); 1780 if (!hp) 1781 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1782 1783 if (hp->h_addrtype != AF_INET) 1784 errx(1, "%s only supported with IP", arg); 1785 1786 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1787 1788 if (realname) { 1789 (void)strncpy(realname, hp->h_name, realname_len); 1790 realname[realname_len-1] = '\0'; 1791 } 1792 } 1793 1794 1795 static void 1796 usage(void) 1797 { 1798 #ifdef IPSEC 1799 #ifdef IPSEC_POLICY_IPSEC 1800 #define IPSECOPT "\n [-E policy] " 1801 #else 1802 #define IPSECOPT "\n [-AE] " 1803 #endif /*IPSEC_POLICY_IPSEC*/ 1804 #else 1805 #define IPSECOPT "" 1806 #endif /*IPSEC*/ 1807 1808 (void)fprintf(stderr, "Usage: \n" 1809 "%s [-dDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1810 " [-i interval] [-I addr]\n" 1811 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1812 " [-w maxwait] " IPSECOPT "host\n", 1813 __progname); 1814 exit(1); 1815 } 1816
Indexes created Wed Oct 01 07:09:59 GMT 2025