ping.c revision 1.83
1 /* $NetBSD: ping.c,v 1.83 2006/09/24 11:05:09 elad Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Muuss. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * P I N G . C 37 * 38 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, 39 * measure round-trip-delays and packet loss across network paths. 40 * 41 * Author - 42 * Mike Muuss 43 * U. S. Army Ballistic Research Laboratory 44 * December, 1983 45 * Modified at Uc Berkeley 46 * Record Route and verbose headers - Phil Dykstra, BRL, March 1988. 47 * Multicast options (ttl, if, loop) - Steve Deering, Stanford, August 1988. 48 * ttl, duplicate detection - Cliff Frost, UCB, April 1989 49 * Pad pattern - Cliff Frost (from Tom Ferrin, UCSF), April 1989 50 * 51 * Status - 52 * Public Domain. Distribution Unlimited. 53 * 54 * Bugs - 55 * More statistics could always be gathered. 56 * This program has to run SUID to ROOT to access the ICMP socket. 57 */ 58 59 #include <sys/cdefs.h> 60 #ifndef lint 61 __RCSID("$NetBSD: ping.c,v 1.83 2006/09/24 11:05:09 elad Exp $"); 62 #endif 63 64 #include <stdio.h> 65 #include <stddef.h> 66 #include <errno.h> 67 #include <signal.h> 68 #include <sys/time.h> 69 #include <sys/types.h> 70 #include <sys/param.h> 71 #include <sys/socket.h> 72 #include <sys/file.h> 73 #include <termios.h> 74 #include <stdlib.h> 75 #include <unistd.h> 76 #include <poll.h> 77 #include <limits.h> 78 #include <math.h> 79 #include <string.h> 80 #include <err.h> 81 #ifdef sgi 82 #include <bstring.h> 83 #include <getopt.h> 84 #include <sys/prctl.h> 85 #ifndef PRE_KUDZU 86 #include <cap_net.h> 87 #else 88 #define cap_socket socket 89 #endif 90 #else 91 #define cap_socket socket 92 #include <err.h> 93 #endif 94 95 #include <netinet/in_systm.h> 96 #include <netinet/in.h> 97 #include <netinet/ip.h> 98 #include <netinet/ip_icmp.h> 99 #include <netinet/ip_var.h> 100 #include <arpa/inet.h> 101 #include <ctype.h> 102 #include <netdb.h> 103 104 #ifdef IPSEC 105 #include <netinet6/ipsec.h> 106 #endif /*IPSEC*/ 107 108 #define FLOOD_INTVL 0.01 /* default flood output interval */ 109 #define MAXPACKET (IP_MAXPACKET-60-8) /* max packet size */ 110 111 #define F_VERBOSE 0x0001 112 #define F_QUIET 0x0002 /* minimize all output */ 113 #define F_SEMI_QUIET 0x0004 /* ignore our ICMP errors */ 114 #define F_FLOOD 0x0008 /* flood-ping */ 115 #define F_RECORD_ROUTE 0x0010 /* record route */ 116 #define F_SOURCE_ROUTE 0x0020 /* loose source route */ 117 #define F_PING_FILLED 0x0040 /* is buffer filled with user data? */ 118 #define F_PING_RANDOM 0x0080 /* use random data */ 119 #define F_NUMERIC 0x0100 /* do not do gethostbyaddr() calls */ 120 #define F_TIMING 0x0200 /* room for a timestamp */ 121 #define F_DF 0x0400 /* set IP DF bit */ 122 #define F_SOURCE_ADDR 0x0800 /* set source IP address/interface */ 123 #define F_ONCE 0x1000 /* exit(0) after receiving 1 reply */ 124 #define F_MCAST 0x2000 /* multicast target */ 125 #define F_MCAST_NOLOOP 0x4000 /* no multicast loopback */ 126 #define F_AUDIBLE 0x8000 /* audible output */ 127 #ifdef IPSEC 128 #ifdef IPSEC_POLICY_IPSEC 129 #define F_POLICY 0x10000 130 #else 131 #define F_AUTHHDR 0x10000 132 #define F_ENCRYPT 0x20000 133 #endif /*IPSEC_POLICY_IPSEC*/ 134 #endif /*IPSEC*/ 135 136 137 /* MAX_DUP_CHK is the number of bits in received table, the 138 * maximum number of received sequence numbers we can track to check 139 * for duplicates. 140 */ 141 #define MAX_DUP_CHK (8 * 2048) 142 u_char rcvd_tbl[MAX_DUP_CHK/8]; 143 int nrepeats = 0; 144 #define A(seq) rcvd_tbl[(seq/8)%sizeof(rcvd_tbl)] /* byte in array */ 145 #define B(seq) (1 << (seq & 0x07)) /* bit in byte */ 146 #define SET(seq) (A(seq) |= B(seq)) 147 #define CLR(seq) (A(seq) &= (~B(seq))) 148 #define TST(seq) (A(seq) & B(seq)) 149 150 struct tv32 { 151 int32_t tv32_sec; 152 int32_t tv32_usec; 153 }; 154 155 156 u_char *packet; 157 int packlen; 158 int pingflags = 0, options; 159 char *fill_pat; 160 161 int s; /* Socket file descriptor */ 162 int sloop; /* Socket file descriptor/loopback */ 163 164 #define PHDR_LEN sizeof(struct tv32) /* size of timestamp header */ 165 struct sockaddr_in whereto, send_addr; /* Who to ping */ 166 struct sockaddr_in src_addr; /* from where */ 167 struct sockaddr_in loc_addr; /* 127.1 */ 168 int datalen = 64 - PHDR_LEN; /* How much data */ 169 170 #ifndef __NetBSD__ 171 static char *progname; 172 #define getprogname() (progname) 173 #define setprogname(name) ((void)(progname = (name))) 174 #endif 175 176 char hostname[MAXHOSTNAMELEN]; 177 178 static struct { 179 struct ip o_ip; 180 char o_opt[MAX_IPOPTLEN]; 181 union { 182 u_char u_buf[MAXPACKET+offsetof(struct icmp, icmp_data)]; 183 struct icmp u_icmp; 184 } o_u; 185 } out_pack; 186 #define opack_icmp out_pack.o_u.u_icmp 187 struct ip *opack_ip; 188 189 char optspace[MAX_IPOPTLEN]; /* record route space */ 190 int optlen; 191 192 193 int npackets; /* total packets to send */ 194 int preload; /* number of packets to "preload" */ 195 int ntransmitted; /* output sequence # = #sent */ 196 int ident; /* our ID, in network byte order */ 197 198 int nreceived; /* # of packets we got back */ 199 200 double interval; /* interval between packets */ 201 struct timeval interval_tv; 202 double tmin = 999999999.0; 203 double tmax = 0.0; 204 double tsum = 0.0; /* sum of all times */ 205 double tsumsq = 0.0; 206 double maxwait = 0.0; 207 208 int bufspace = IP_MAXPACKET; 209 210 struct timeval now, clear_cache, last_tx, next_tx, first_tx; 211 struct timeval last_rx, first_rx; 212 int lastrcvd = 1; /* last ping sent has been received */ 213 214 static struct timeval jiggle_time; 215 static int jiggle_cnt, total_jiggled, jiggle_direction = -1; 216 217 static void doit(void); 218 static void prefinish(int); 219 static void prtsig(int); 220 static void finish(int); 221 static void summary(int); 222 static void pinger(void); 223 static void fill(void); 224 static void rnd_fill(void); 225 static double diffsec(struct timeval *, struct timeval *); 226 static void timevaladd(struct timeval *, struct timeval *); 227 static void sec_to_timeval(const double, struct timeval *); 228 static double timeval_to_sec(const struct timeval *); 229 static void pr_pack(u_char *, int, struct sockaddr_in *); 230 static u_int16_t in_cksum(u_int16_t *, u_int); 231 static void pr_saddr(u_char *); 232 static char *pr_addr(struct in_addr *); 233 static void pr_iph(struct icmp *, int); 234 static void pr_retip(struct icmp *, int); 235 static int pr_icmph(struct icmp *, struct sockaddr_in *, int); 236 static void jiggle(int), jiggle_flush(int); 237 static void gethost(const char *, const char *, 238 struct sockaddr_in *, char *, int); 239 static void usage(void); 240 241 int 242 main(int argc, char *argv[]) 243 { 244 int c, i, on = 1, hostind = 0; 245 long l; 246 u_char ttl = 0; 247 u_long tos = 0; 248 char *p; 249 #ifdef IPSEC 250 #ifdef IPSEC_POLICY_IPSEC 251 char *policy_in = NULL; 252 char *policy_out = NULL; 253 #endif 254 #endif 255 #ifdef SIGINFO 256 struct sigaction sa; 257 #endif 258 259 if ((s = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 260 err(1, "Cannot create socket"); 261 if ((sloop = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 262 err(1, "Cannot create socket"); 263 264 if (seteuid(getuid()) == -1) 265 err(1, "seteuid"); 266 267 setprogname(argv[0]); 268 269 #ifndef IPSEC 270 #define IPSECOPT 271 #else 272 #ifdef IPSEC_POLICY_IPSEC 273 #define IPSECOPT "E:" 274 #else 275 #define IPSECOPT "AE" 276 #endif /*IPSEC_POLICY_IPSEC*/ 277 #endif 278 while ((c = getopt(argc, argv, 279 "ac:dDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 280 #undef IPSECOPT 281 switch (c) { 282 case 'a': 283 pingflags |= F_AUDIBLE; 284 break; 285 case 'c': 286 npackets = strtol(optarg, &p, 0); 287 if (*p != '\0' || npackets <= 0) 288 errx(1, "Bad/invalid number of packets"); 289 break; 290 case 'D': 291 pingflags |= F_DF; 292 break; 293 case 'd': 294 options |= SO_DEBUG; 295 break; 296 case 'f': 297 pingflags |= F_FLOOD; 298 break; 299 case 'h': 300 hostind = optind-1; 301 break; 302 case 'i': /* wait between sending packets */ 303 interval = strtod(optarg, &p); 304 if (*p != '\0' || interval <= 0) 305 errx(1, "Bad/invalid interval %s", optarg); 306 break; 307 case 'l': 308 preload = strtol(optarg, &p, 0); 309 if (*p != '\0' || preload < 0) 310 errx(1, "Bad/invalid preload value %s", 311 optarg); 312 break; 313 case 'n': 314 pingflags |= F_NUMERIC; 315 break; 316 case 'o': 317 pingflags |= F_ONCE; 318 break; 319 case 'p': /* fill buffer with user pattern */ 320 if (pingflags & F_PING_RANDOM) 321 errx(1, "Only one of -P and -p allowed"); 322 pingflags |= F_PING_FILLED; 323 fill_pat = optarg; 324 break; 325 case 'P': 326 if (pingflags & F_PING_FILLED) 327 errx(1, "Only one of -P and -p allowed"); 328 pingflags |= F_PING_RANDOM; 329 break; 330 case 'q': 331 pingflags |= F_QUIET; 332 break; 333 case 'Q': 334 pingflags |= F_SEMI_QUIET; 335 break; 336 case 'r': 337 options |= SO_DONTROUTE; 338 break; 339 case 's': /* size of packet to send */ 340 datalen = strtol(optarg, &p, 0); 341 if (*p != '\0' || datalen < 0) 342 errx(1, "Bad/invalid packet size %s", optarg); 343 if (datalen > MAXPACKET) 344 errx(1, "packet size is too large"); 345 break; 346 case 'v': 347 pingflags |= F_VERBOSE; 348 break; 349 case 'R': 350 pingflags |= F_RECORD_ROUTE; 351 break; 352 case 'L': 353 pingflags |= F_MCAST_NOLOOP; 354 break; 355 case 't': 356 tos = strtoul(optarg, &p, 0); 357 if (*p != '\0' || tos > 0xFF) 358 errx(1, "bad tos value: %s", optarg); 359 break; 360 case 'T': 361 l = strtol(optarg, &p, 0); 362 if (*p != '\0' || l > 255 || l <= 0) 363 errx(1, "ttl out of range"); 364 ttl = (u_char)l; /* cannot check >255 otherwise */ 365 break; 366 case 'I': 367 pingflags |= F_SOURCE_ADDR; 368 gethost("-I", optarg, &src_addr, 0, 0); 369 break; 370 case 'g': 371 pingflags |= F_SOURCE_ROUTE; 372 gethost("-g", optarg, &send_addr, 0, 0); 373 break; 374 case 'w': 375 maxwait = strtod(optarg, &p); 376 if (*p != '\0' || maxwait <= 0) 377 errx(1, "Bad/invalid maxwait time %s", optarg); 378 break; 379 #ifdef IPSEC 380 #ifdef IPSEC_POLICY_IPSEC 381 case 'E': 382 pingflags |= F_POLICY; 383 if (!strncmp("in", optarg, 2)) { 384 policy_in = strdup(optarg); 385 if (!policy_in) 386 err(1, "strdup"); 387 } else if (!strncmp("out", optarg, 3)) { 388 policy_out = strdup(optarg); 389 if (!policy_out) 390 err(1, "strdup"); 391 } else 392 errx(1, "invalid security policy"); 393 break; 394 #else 395 case 'A': 396 pingflags |= F_AUTHHDR; 397 break; 398 case 'E': 399 pingflags |= F_ENCRYPT; 400 break; 401 #endif /*IPSEC_POLICY_IPSEC*/ 402 #endif /*IPSEC*/ 403 default: 404 usage(); 405 break; 406 } 407 } 408 409 if (interval == 0) 410 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 411 #ifndef sgi 412 if (pingflags & F_FLOOD && getuid()) 413 errx(1, "Must be superuser to use -f"); 414 if (interval < 1.0 && getuid()) 415 errx(1, "Must be superuser to use < 1 sec ping interval"); 416 if (preload > 0 && getuid()) 417 errx(1, "Must be superuser to use -l"); 418 #endif 419 sec_to_timeval(interval, &interval_tv); 420 421 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 422 warnx("Sorry, no audible output for flood pings"); 423 424 if (npackets != 0) { 425 npackets += preload; 426 } else { 427 npackets = INT_MAX; 428 } 429 430 if (hostind == 0) { 431 if (optind != argc-1) 432 usage(); 433 else 434 hostind = optind; 435 } 436 else if (hostind >= argc - 1) 437 usage(); 438 439 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 440 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 441 pingflags |= F_MCAST; 442 if (!(pingflags & F_SOURCE_ROUTE)) 443 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 444 445 loc_addr.sin_family = AF_INET; 446 loc_addr.sin_len = sizeof(struct sockaddr_in); 447 loc_addr.sin_addr.s_addr = htonl((127<<24)+1); 448 449 if (datalen >= PHDR_LEN) /* can we time them? */ 450 pingflags |= F_TIMING; 451 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 452 if ((packet = (u_char *)malloc(packlen)) == NULL) 453 err(1, "Out of memory"); 454 455 if (pingflags & F_PING_FILLED) { 456 fill(); 457 } else if (pingflags & F_PING_RANDOM) { 458 rnd_fill(); 459 } else { 460 for (i = PHDR_LEN; i < datalen; i++) 461 opack_icmp.icmp_data[i] = i; 462 } 463 464 ident = arc4random() & 0xFFFF; 465 466 if (options & SO_DEBUG) { 467 if (setsockopt(s, SOL_SOCKET, SO_DEBUG, 468 (char *)&on, sizeof(on)) == -1) 469 warn("Can't turn on socket debugging"); 470 } 471 if (options & SO_DONTROUTE) { 472 if (setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 473 (char *)&on, sizeof(on)) == -1) 474 warn("SO_DONTROUTE"); 475 } 476 477 if (options & SO_DEBUG) { 478 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 479 (char *)&on, sizeof(on)) == -1) 480 warn("Can't turn on socket debugging"); 481 } 482 if (options & SO_DONTROUTE) { 483 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 484 (char *)&on, sizeof(on)) == -1) 485 warn("SO_DONTROUTE"); 486 } 487 488 if (pingflags & F_SOURCE_ROUTE) { 489 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 490 optspace[IPOPT_OLEN] = optlen = 7; 491 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 492 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 493 sizeof(whereto.sin_addr)); 494 optspace[optlen++] = IPOPT_NOP; 495 } 496 if (pingflags & F_RECORD_ROUTE) { 497 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 498 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 499 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 500 optlen = MAX_IPOPTLEN; 501 } 502 /* this leaves opack_ip 0(mod 4) aligned */ 503 opack_ip = (struct ip *)((char *)&out_pack.o_ip 504 + sizeof(out_pack.o_opt) 505 - optlen); 506 (void) memcpy(opack_ip + 1, optspace, optlen); 507 508 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 509 err(1, "Can't set special IP header"); 510 511 opack_ip->ip_v = IPVERSION; 512 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 513 opack_ip->ip_tos = tos; 514 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 515 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 516 opack_ip->ip_p = IPPROTO_ICMP; 517 opack_ip->ip_src = src_addr.sin_addr; 518 opack_ip->ip_dst = send_addr.sin_addr; 519 520 if (pingflags & F_MCAST) { 521 if (pingflags & F_MCAST_NOLOOP) { 522 u_char loop = 0; 523 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 524 (char *) &loop, 1) < 0) 525 err(1, "Can't disable multicast loopback"); 526 } 527 528 if (ttl != 0 529 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 530 (char *) &ttl, 1) < 0) 531 err(1, "Can't set multicast time-to-live"); 532 533 if ((pingflags & F_SOURCE_ADDR) 534 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 535 (char *) &src_addr.sin_addr, 536 sizeof(src_addr.sin_addr)) < 0) 537 err(1, "Can't set multicast source interface"); 538 539 } else if (pingflags & F_SOURCE_ADDR) { 540 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 541 (char *) &src_addr.sin_addr, 542 sizeof(src_addr.sin_addr)) < 0) 543 err(1, "Can't set source interface/address"); 544 } 545 #ifdef IPSEC 546 #ifdef IPSEC_POLICY_IPSEC 547 { 548 char *buf; 549 if (pingflags & F_POLICY) { 550 if (policy_in != NULL) { 551 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 552 if (buf == NULL) 553 errx(1, "%s", ipsec_strerror()); 554 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 555 buf, ipsec_get_policylen(buf)) < 0) { 556 err(1, "ipsec policy cannot be configured"); 557 } 558 free(buf); 559 } 560 if (policy_out != NULL) { 561 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 562 if (buf == NULL) 563 errx(1, "%s", ipsec_strerror()); 564 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 565 buf, ipsec_get_policylen(buf)) < 0) { 566 err(1, "ipsec policy cannot be configured"); 567 } 568 free(buf); 569 } 570 } 571 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 572 if (buf == NULL) 573 errx(1, "%s", ipsec_strerror()); 574 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 575 buf, ipsec_get_policylen(buf)) < 0) { 576 #if 0 577 warnx("ipsec is not configured"); 578 #else 579 /* ignore it, should be okay */ 580 #endif 581 } 582 free(buf); 583 } 584 #else 585 { 586 int optval; 587 if (pingflags & F_AUTHHDR) { 588 optval = IPSEC_LEVEL_REQUIRE; 589 #ifdef IP_AUTH_TRANS_LEVEL 590 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 591 (char *)&optval, sizeof(optval)); 592 #else 593 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 594 (char *)&optval, sizeof(optval)); 595 #endif 596 } 597 if (pingflags & F_ENCRYPT) { 598 optval = IPSEC_LEVEL_REQUIRE; 599 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 600 (char *)&optval, sizeof(optval)); 601 } 602 optval = IPSEC_LEVEL_BYPASS; 603 #ifdef IP_AUTH_TRANS_LEVEL 604 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 605 (char *)&optval, sizeof(optval)); 606 #else 607 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 608 (char *)&optval, sizeof(optval)); 609 #endif 610 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 611 (char *)&optval, sizeof(optval)); 612 } 613 #endif /*IPSEC_POLICY_IPSEC*/ 614 #endif /*IPSEC*/ 615 616 (void)printf("PING %s (%s): %d data bytes\n", hostname, 617 inet_ntoa(whereto.sin_addr), datalen); 618 619 /* When pinging the broadcast address, you can get a lot 620 * of answers. Doing something so evil is useful if you 621 * are trying to stress the ethernet, or just want to 622 * fill the arp cache to get some stuff for /etc/ethers. 623 */ 624 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 625 (char*)&bufspace, sizeof(bufspace))) { 626 if ((bufspace -= 4096) <= 0) 627 err(1, "Cannot set the receive buffer size"); 628 } 629 630 /* make it possible to send giant probes, but do not worry now 631 * if it fails, since we probably won't send giant probes. 632 */ 633 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 634 (char*)&bufspace, sizeof(bufspace)); 635 636 (void)signal(SIGINT, prefinish); 637 638 #ifdef SIGINFO 639 sa.sa_handler = prtsig; 640 sa.sa_flags = SA_NOKERNINFO; 641 sigemptyset(&sa.sa_mask); 642 (void)sigaction(SIGINFO, &sa, NULL); 643 #else 644 (void)signal(SIGQUIT, prtsig); 645 #endif 646 (void)signal(SIGCONT, prtsig); 647 648 /* fire off them quickies */ 649 for (i = 0; i < preload; i++) { 650 (void)gettimeofday(&now, 0); 651 pinger(); 652 } 653 654 doit(); 655 return 0; 656 } 657 658 659 static void 660 doit(void) 661 { 662 int cc; 663 struct sockaddr_in from; 664 socklen_t fromlen; 665 double sec, last, d_last; 666 struct pollfd fdmaskp[1]; 667 668 (void)gettimeofday(&clear_cache,0); 669 if (maxwait != 0) { 670 last = timeval_to_sec(&clear_cache) + maxwait; 671 d_last = 0; 672 } else { 673 last = 0; 674 d_last = 365*24*60*60; 675 } 676 677 do { 678 (void)gettimeofday(&now,0); 679 680 if (last != 0) 681 d_last = last - timeval_to_sec(&now); 682 683 if (ntransmitted < npackets && d_last > 0) { 684 /* send if within 100 usec or late for next packet */ 685 sec = diffsec(&next_tx,&now); 686 if (sec <= 0.0001 || 687 (lastrcvd && (pingflags & F_FLOOD))) { 688 pinger(); 689 sec = diffsec(&next_tx,&now); 690 } 691 if (sec < 0.0) 692 sec = 0.0; 693 if (d_last < sec) 694 sec = d_last; 695 696 } else { 697 /* For the last response, wait twice as long as the 698 * worst case seen, or 10 times as long as the 699 * maximum interpacket interval, whichever is longer. 700 */ 701 sec = MAX(2 * tmax, 10 * interval) - 702 diffsec(&now, &last_tx); 703 if (d_last < sec) 704 sec = d_last; 705 if (sec <= 0) 706 break; 707 } 708 709 710 fdmaskp[0].fd = s; 711 fdmaskp[0].events = POLLIN; 712 cc = poll(fdmaskp, 1, (int)(sec * 1000)); 713 if (cc <= 0) { 714 if (cc < 0) { 715 if (errno == EINTR) 716 continue; 717 jiggle_flush(1); 718 err(1, "poll"); 719 } 720 continue; 721 } 722 723 fromlen = sizeof(from); 724 cc = recvfrom(s, (char *) packet, packlen, 725 0, (struct sockaddr *)&from, 726 &fromlen); 727 if (cc < 0) { 728 if (errno != EINTR) { 729 jiggle_flush(1); 730 warn("recvfrom"); 731 (void)fflush(stderr); 732 } 733 continue; 734 } 735 (void)gettimeofday(&now, 0); 736 pr_pack(packet, cc, &from); 737 738 } while (nreceived < npackets 739 && (nreceived == 0 || !(pingflags & F_ONCE))); 740 741 finish(0); 742 } 743 744 745 static void 746 jiggle_flush(int nl) /* new line if there are dots */ 747 { 748 int serrno = errno; 749 750 if (jiggle_cnt > 0) { 751 total_jiggled += jiggle_cnt; 752 jiggle_direction = 1; 753 do { 754 (void)putchar('.'); 755 } while (--jiggle_cnt > 0); 756 757 } else if (jiggle_cnt < 0) { 758 total_jiggled -= jiggle_cnt; 759 jiggle_direction = -1; 760 do { 761 (void)putchar('\b'); 762 } while (++jiggle_cnt < 0); 763 } 764 765 if (nl) { 766 if (total_jiggled != 0) 767 (void)putchar('\n'); 768 total_jiggled = 0; 769 jiggle_direction = -1; 770 } 771 772 (void)fflush(stdout); 773 (void)fflush(stderr); 774 jiggle_time = now; 775 errno = serrno; 776 } 777 778 779 /* jiggle the cursor for flood-ping 780 */ 781 static void 782 jiggle(int delta) 783 { 784 double dt; 785 786 if (pingflags & F_QUIET) 787 return; 788 789 /* do not back up into messages */ 790 if (total_jiggled+jiggle_cnt+delta < 0) 791 return; 792 793 jiggle_cnt += delta; 794 795 /* flush the FLOOD dots when things are quiet 796 * or occassionally to make the cursor jiggle. 797 */ 798 dt = diffsec(&last_tx, &jiggle_time); 799 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 800 jiggle_flush(0); 801 } 802 803 804 /* 805 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 806 * will be added on by the kernel. The ID field is our UNIX process ID, 807 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 808 * of the data portion are used to hold a UNIX "timeval" struct in VAX 809 * byte-order, to compute the round-trip time. 810 */ 811 static void 812 pinger(void) 813 { 814 struct tv32 tv32; 815 int i, cc, sw; 816 817 opack_icmp.icmp_code = 0; 818 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 819 820 /* clear the cached route in the kernel after an ICMP 821 * response such as a Redirect is seen to stop causing 822 * more such packets. Also clear the cached route 823 * periodically in case of routing changes that make 824 * black holes come and go. 825 */ 826 if (clear_cache.tv_sec != now.tv_sec) { 827 opack_icmp.icmp_type = ICMP_ECHOREPLY; 828 opack_icmp.icmp_id = ~ident; 829 opack_icmp.icmp_cksum = 0; 830 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 831 PHDR_LEN); 832 sw = 0; 833 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 834 (char *)&sw,sizeof(sw)) < 0) 835 err(1, "Can't turn off special IP header"); 836 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 837 (struct sockaddr *)&loc_addr, 838 sizeof(struct sockaddr_in)) < 0) { 839 /* 840 * XXX: we only report this as a warning in verbose 841 * mode because people get confused when they see 842 * this error when they are running in single user 843 * mode and they have not configured lo0 844 */ 845 if (pingflags & F_VERBOSE) 846 warn("failed to clear cached route"); 847 } 848 sw = 1; 849 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 850 (char *)&sw, sizeof(sw)) < 0) 851 err(1, "Can't set special IP header"); 852 853 (void)gettimeofday(&clear_cache,0); 854 } 855 856 opack_icmp.icmp_type = ICMP_ECHO; 857 opack_icmp.icmp_id = ident; 858 tv32.tv32_sec = htonl(now.tv_sec); 859 tv32.tv32_usec = htonl(now.tv_usec); 860 if (pingflags & F_TIMING) 861 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 862 cc = datalen + PHDR_LEN; 863 opack_icmp.icmp_cksum = 0; 864 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 865 866 cc += opack_ip->ip_hl<<2; 867 opack_ip->ip_len = cc; 868 i = sendto(s, (char *) opack_ip, cc, 0, 869 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 870 if (i != cc) { 871 jiggle_flush(1); 872 if (i < 0) 873 warn("sendto"); 874 else 875 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 876 (void)fflush(stderr); 877 } 878 lastrcvd = 0; 879 880 CLR(ntransmitted); 881 ntransmitted++; 882 883 last_tx = now; 884 if (next_tx.tv_sec == 0) { 885 first_tx = now; 886 next_tx = now; 887 } 888 889 /* Transmit regularly, at always the same microsecond in the 890 * second when going at one packet per second. 891 * If we are at most 100 ms behind, send extras to get caught up. 892 * Otherwise, skip packets we were too slow to send. 893 */ 894 if (diffsec(&next_tx, &now) <= interval) { 895 do { 896 timevaladd(&next_tx, &interval_tv); 897 } while (diffsec(&next_tx, &now) < -0.1); 898 } 899 900 if (pingflags & F_FLOOD) 901 jiggle(1); 902 903 /* While the packet is going out, ready buffer for the next 904 * packet. Use a fast but not very good random number generator. 905 */ 906 if (pingflags & F_PING_RANDOM) 907 rnd_fill(); 908 } 909 910 911 static void 912 pr_pack_sub(int cc, 913 char *addr, 914 int seqno, 915 int dupflag, 916 int ttl, 917 double triptime) 918 { 919 jiggle_flush(1); 920 921 if (pingflags & F_FLOOD) 922 return; 923 924 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 925 if (dupflag) 926 (void)printf(" DUP!"); 927 (void)printf(" ttl=%d", ttl); 928 if (pingflags & F_TIMING) 929 (void)printf(" time=%.3f ms", triptime*1000.0); 930 931 /* 932 * Send beep to stderr, since that's more likely than stdout 933 * to go to a terminal.. 934 */ 935 if (pingflags & F_AUDIBLE && !dupflag) 936 (void)fprintf(stderr,"\a"); 937 } 938 939 940 /* 941 * Print out the packet, if it came from us. This logic is necessary 942 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 943 * which arrive ('tis only fair). This permits multiple copies of this 944 * program to be run without having intermingled output (or statistics!). 945 */ 946 static void 947 pr_pack(u_char *buf, 948 int tot_len, 949 struct sockaddr_in *from) 950 { 951 struct ip *ip; 952 struct icmp *icp; 953 int i, j, net_len; 954 u_char *cp; 955 static int old_rrlen; 956 static char old_rr[MAX_IPOPTLEN]; 957 int hlen, dupflag = 0, dumped; 958 double triptime = 0.0; 959 #define PR_PACK_SUB() {if (!dumped) { \ 960 dumped = 1; \ 961 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 962 ntohs((u_int16_t)icp->icmp_seq), \ 963 dupflag, ip->ip_ttl, triptime);}} 964 965 /* Check the IP header */ 966 ip = (struct ip *) buf; 967 hlen = ip->ip_hl << 2; 968 if (tot_len < hlen + ICMP_MINLEN) { 969 if (pingflags & F_VERBOSE) { 970 jiggle_flush(1); 971 (void)printf("packet too short (%d bytes) from %s\n", 972 tot_len, inet_ntoa(from->sin_addr)); 973 } 974 return; 975 } 976 977 /* Now the ICMP part */ 978 dumped = 0; 979 net_len = tot_len - hlen; 980 icp = (struct icmp *)(buf + hlen); 981 if (icp->icmp_type == ICMP_ECHOREPLY 982 && icp->icmp_id == ident) { 983 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 984 lastrcvd = 1; 985 last_rx = now; 986 if (first_rx.tv_sec == 0) 987 first_rx = last_rx; 988 nreceived++; 989 if (pingflags & F_TIMING) { 990 struct timeval tv; 991 struct tv32 tv32; 992 993 (void) memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 994 tv.tv_sec = ntohl(tv32.tv32_sec); 995 tv.tv_usec = ntohl(tv32.tv32_usec); 996 triptime = diffsec(&last_rx, &tv); 997 tsum += triptime; 998 tsumsq += triptime * triptime; 999 if (triptime < tmin) 1000 tmin = triptime; 1001 if (triptime > tmax) 1002 tmax = triptime; 1003 } 1004 1005 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1006 nrepeats++, nreceived--; 1007 dupflag=1; 1008 } else { 1009 SET(ntohs((u_int16_t)icp->icmp_seq)); 1010 } 1011 1012 if (tot_len != opack_ip->ip_len) { 1013 PR_PACK_SUB(); 1014 (void)printf("\nwrong total length %d instead of %d", 1015 tot_len, opack_ip->ip_len); 1016 } 1017 1018 if (!dupflag) { 1019 static u_int16_t last_seqno = 0xffff; 1020 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1021 u_int16_t gap = seqno - (last_seqno + 1); 1022 if (gap > 0 && gap < 0x8000 && 1023 (pingflags & F_VERBOSE)) { 1024 (void)printf("[*** sequence gap of %u " 1025 "packets from %u ... %u ***]\n", gap, 1026 (u_int16_t) (last_seqno + 1), 1027 (u_int16_t) (seqno - 1)); 1028 if (pingflags & F_QUIET) 1029 summary(0); 1030 } 1031 1032 if (gap < 0x8000) 1033 last_seqno = seqno; 1034 } 1035 1036 if (pingflags & F_QUIET) 1037 return; 1038 1039 if (!(pingflags & F_FLOOD)) 1040 PR_PACK_SUB(); 1041 1042 /* check the data */ 1043 if (datalen > PHDR_LEN 1044 && !(pingflags & F_PING_RANDOM) 1045 && memcmp(&icp->icmp_data[PHDR_LEN], 1046 &opack_icmp.icmp_data[PHDR_LEN], 1047 datalen-PHDR_LEN)) { 1048 for (i=PHDR_LEN; i<datalen; i++) { 1049 if (icp->icmp_data[i] != 1050 opack_icmp.icmp_data[i]) 1051 break; 1052 } 1053 PR_PACK_SUB(); 1054 (void)printf("\nwrong data byte #%d should have been" 1055 " %#x but was %#x", i, 1056 (u_char)opack_icmp.icmp_data[i], 1057 (u_char)icp->icmp_data[i]); 1058 for (i=PHDR_LEN; i<datalen; i++) { 1059 if ((i%16) == PHDR_LEN) 1060 (void)printf("\n\t"); 1061 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1062 } 1063 } 1064 1065 } else { 1066 if (!pr_icmph(icp, from, net_len)) 1067 return; 1068 dumped = 2; 1069 } 1070 1071 /* Display any IP options */ 1072 cp = buf + sizeof(struct ip); 1073 while (hlen > (int)sizeof(struct ip)) { 1074 switch (*cp) { 1075 case IPOPT_EOL: 1076 hlen = 0; 1077 break; 1078 case IPOPT_LSRR: 1079 hlen -= 2; 1080 j = *++cp; 1081 ++cp; 1082 j -= IPOPT_MINOFF; 1083 if (j <= 0) 1084 continue; 1085 if (dumped <= 1) { 1086 j = ((j+3)/4)*4; 1087 hlen -= j; 1088 cp += j; 1089 break; 1090 } 1091 PR_PACK_SUB(); 1092 (void)printf("\nLSRR: "); 1093 for (;;) { 1094 pr_saddr(cp); 1095 cp += 4; 1096 hlen -= 4; 1097 j -= 4; 1098 if (j <= 0) 1099 break; 1100 (void)putchar('\n'); 1101 } 1102 break; 1103 case IPOPT_RR: 1104 j = *++cp; /* get length */ 1105 i = *++cp; /* and pointer */ 1106 hlen -= 2; 1107 if (i > j) 1108 i = j; 1109 i -= IPOPT_MINOFF; 1110 if (i <= 0) 1111 continue; 1112 if (dumped <= 1) { 1113 if (i == old_rrlen 1114 && !memcmp(cp, old_rr, i)) { 1115 if (dumped) 1116 (void)printf("\t(same route)"); 1117 j = ((i+3)/4)*4; 1118 hlen -= j; 1119 cp += j; 1120 break; 1121 } 1122 old_rrlen = i; 1123 (void) memcpy(old_rr, cp, i); 1124 } 1125 if (!dumped) { 1126 jiggle_flush(1); 1127 (void)printf("RR: "); 1128 dumped = 1; 1129 } else { 1130 (void)printf("\nRR: "); 1131 } 1132 for (;;) { 1133 pr_saddr(cp); 1134 cp += 4; 1135 hlen -= 4; 1136 i -= 4; 1137 if (i <= 0) 1138 break; 1139 (void)putchar('\n'); 1140 } 1141 break; 1142 case IPOPT_NOP: 1143 if (dumped <= 1) 1144 break; 1145 PR_PACK_SUB(); 1146 (void)printf("\nNOP"); 1147 break; 1148 #ifdef sgi 1149 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1150 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1151 case IPOPT_CIPSO: /* Commercial IPSO */ 1152 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1153 i = (unsigned)cp[1]; 1154 hlen -= i - 1; 1155 PR_PACK_SUB(); 1156 (void)printf("\nSEC:"); 1157 while (i--) { 1158 (void)printf(" %02x", *cp++); 1159 } 1160 cp--; 1161 break; 1162 } 1163 #endif 1164 default: 1165 PR_PACK_SUB(); 1166 (void)printf("\nunknown option 0x%x", *cp); 1167 break; 1168 } 1169 hlen--; 1170 cp++; 1171 } 1172 1173 if (dumped) { 1174 (void)putchar('\n'); 1175 (void)fflush(stdout); 1176 } else { 1177 jiggle(-1); 1178 } 1179 } 1180 1181 1182 /* Compute the IP checksum 1183 * This assumes the packet is less than 32K long. 1184 */ 1185 static u_int16_t 1186 in_cksum(u_int16_t *p, u_int len) 1187 { 1188 u_int32_t sum = 0; 1189 int nwords = len >> 1; 1190 1191 while (nwords-- != 0) 1192 sum += *p++; 1193 1194 if (len & 1) { 1195 union { 1196 u_int16_t w; 1197 u_int8_t c[2]; 1198 } u; 1199 u.c[0] = *(u_char *)p; 1200 u.c[1] = 0; 1201 sum += u.w; 1202 } 1203 1204 /* end-around-carry */ 1205 sum = (sum >> 16) + (sum & 0xffff); 1206 sum += (sum >> 16); 1207 return (~sum); 1208 } 1209 1210 1211 /* 1212 * compute the difference of two timevals in seconds 1213 */ 1214 static double 1215 diffsec(struct timeval *timenow, 1216 struct timeval *then) 1217 { 1218 return ((timenow->tv_sec - then->tv_sec)*1.0 1219 + (timenow->tv_usec - then->tv_usec)/1000000.0); 1220 } 1221 1222 1223 static void 1224 timevaladd(struct timeval *t1, 1225 struct timeval *t2) 1226 { 1227 1228 t1->tv_sec += t2->tv_sec; 1229 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1230 t1->tv_sec++; 1231 t1->tv_usec -= 1000000; 1232 } 1233 } 1234 1235 1236 static void 1237 sec_to_timeval(const double sec, struct timeval *tp) 1238 { 1239 tp->tv_sec = sec; 1240 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1241 } 1242 1243 1244 static double 1245 timeval_to_sec(const struct timeval *tp) 1246 { 1247 return tp->tv_sec + tp->tv_usec / 1000000.0; 1248 } 1249 1250 1251 /* 1252 * Print statistics. 1253 * Heavily buffered STDIO is used here, so that all the statistics 1254 * will be written with 1 sys-write call. This is nice when more 1255 * than one copy of the program is running on a terminal; it prevents 1256 * the statistics output from becomming intermingled. 1257 */ 1258 static void 1259 summary(int header) 1260 { 1261 jiggle_flush(1); 1262 1263 if (header) 1264 (void)printf("\n----%s PING Statistics----\n", hostname); 1265 (void)printf("%d packets transmitted, ", ntransmitted); 1266 (void)printf("%d packets received, ", nreceived); 1267 if (nrepeats) 1268 (void)printf("+%d duplicates, ", nrepeats); 1269 if (ntransmitted) { 1270 if (nreceived > ntransmitted) 1271 (void)printf("-- somebody's duplicating packets!"); 1272 else 1273 (void)printf("%.1f%% packet loss", 1274 (((ntransmitted-nreceived)*100.0) / 1275 ntransmitted)); 1276 } 1277 (void)printf("\n"); 1278 if (nreceived && (pingflags & F_TIMING)) { 1279 double n = nreceived + nrepeats; 1280 double avg = (tsum / n); 1281 double variance = 0.0; 1282 if (n>1) 1283 variance = (tsumsq - n*avg*avg) /(n-1); 1284 1285 printf("round-trip min/avg/max/stddev = " 1286 "%.3f/%.3f/%.3f/%.3f ms\n", 1287 tmin * 1000.0, avg * 1000.0, 1288 tmax * 1000.0, sqrt(variance) * 1000.0); 1289 if (pingflags & F_FLOOD) { 1290 double r = diffsec(&last_rx, &first_rx); 1291 double t = diffsec(&last_tx, &first_tx); 1292 if (r == 0) 1293 r = 0.0001; 1294 if (t == 0) 1295 t = 0.0001; 1296 (void)printf(" %.1f packets/sec sent, " 1297 " %.1f packets/sec received\n", 1298 ntransmitted/t, nreceived/r); 1299 } 1300 } 1301 } 1302 1303 1304 /* 1305 * Print statistics when SIGINFO is received. 1306 */ 1307 /* ARGSUSED */ 1308 static void 1309 prtsig(int dummy) 1310 { 1311 1312 summary(0); 1313 #ifndef SIGINFO 1314 (void)signal(SIGQUIT, prtsig); 1315 #endif 1316 } 1317 1318 1319 /* 1320 * On the first SIGINT, allow any outstanding packets to dribble in 1321 */ 1322 static void 1323 prefinish(int dummy) 1324 { 1325 if (lastrcvd /* quit now if caught up */ 1326 || nreceived == 0) /* or if remote is dead */ 1327 finish(0); 1328 1329 (void)signal(dummy, finish); /* do this only the 1st time */ 1330 1331 if (npackets > ntransmitted) /* let the normal limit work */ 1332 npackets = ntransmitted; 1333 } 1334 1335 /* 1336 * Print statistics and give up. 1337 */ 1338 /* ARGSUSED */ 1339 static void 1340 finish(int dummy) 1341 { 1342 #ifdef SIGINFO 1343 (void)signal(SIGINFO, SIG_DFL); 1344 #else 1345 (void)signal(SIGQUIT, SIG_DFL); 1346 #endif 1347 1348 summary(1); 1349 exit(nreceived > 0 ? 0 : 2); 1350 } 1351 1352 1353 static int /* 0=do not print it */ 1354 ck_pr_icmph(struct icmp *icp, 1355 struct sockaddr_in *from, 1356 int cc, 1357 int override) /* 1=override VERBOSE if interesting */ 1358 { 1359 int hlen; 1360 struct ip ipb, *ip = &ipb; 1361 struct icmp icp2b, *icp2 = &icp2b; 1362 int res; 1363 1364 if (pingflags & F_VERBOSE) { 1365 res = 1; 1366 jiggle_flush(1); 1367 } else { 1368 res = 0; 1369 } 1370 1371 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1372 hlen = ip->ip_hl << 2; 1373 if (ip->ip_p == IPPROTO_ICMP 1374 && hlen + 6 <= cc) { 1375 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1376 if (icp2->icmp_id == ident) { 1377 /* remember to clear route cached in kernel 1378 * if this non-Echo-Reply ICMP message was for one 1379 * of our packets. 1380 */ 1381 clear_cache.tv_sec = 0; 1382 1383 if (!res && override 1384 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1385 jiggle_flush(1); 1386 (void)printf("%d bytes from %s: ", 1387 cc, pr_addr(&from->sin_addr)); 1388 res = 1; 1389 } 1390 } 1391 } 1392 1393 return res; 1394 } 1395 1396 1397 /* 1398 * Print a descriptive string about an ICMP header other than an echo reply. 1399 */ 1400 static int /* 0=printed nothing */ 1401 pr_icmph(struct icmp *icp, 1402 struct sockaddr_in *from, 1403 int cc) 1404 { 1405 switch (icp->icmp_type ) { 1406 case ICMP_UNREACH: 1407 if (!ck_pr_icmph(icp, from, cc, 1)) 1408 return 0; 1409 switch (icp->icmp_code) { 1410 case ICMP_UNREACH_NET: 1411 (void)printf("Destination Net Unreachable"); 1412 break; 1413 case ICMP_UNREACH_HOST: 1414 (void)printf("Destination Host Unreachable"); 1415 break; 1416 case ICMP_UNREACH_PROTOCOL: 1417 (void)printf("Destination Protocol Unreachable"); 1418 break; 1419 case ICMP_UNREACH_PORT: 1420 (void)printf("Destination Port Unreachable"); 1421 break; 1422 case ICMP_UNREACH_NEEDFRAG: 1423 (void)printf("frag needed and DF set. Next MTU=%d", 1424 ntohs(icp->icmp_nextmtu)); 1425 break; 1426 case ICMP_UNREACH_SRCFAIL: 1427 (void)printf("Source Route Failed"); 1428 break; 1429 case ICMP_UNREACH_NET_UNKNOWN: 1430 (void)printf("Unreachable unknown net"); 1431 break; 1432 case ICMP_UNREACH_HOST_UNKNOWN: 1433 (void)printf("Unreachable unknown host"); 1434 break; 1435 case ICMP_UNREACH_ISOLATED: 1436 (void)printf("Unreachable host isolated"); 1437 break; 1438 case ICMP_UNREACH_NET_PROHIB: 1439 (void)printf("Net prohibited access"); 1440 break; 1441 case ICMP_UNREACH_HOST_PROHIB: 1442 (void)printf("Host prohibited access"); 1443 break; 1444 case ICMP_UNREACH_TOSNET: 1445 (void)printf("Bad TOS for net"); 1446 break; 1447 case ICMP_UNREACH_TOSHOST: 1448 (void)printf("Bad TOS for host"); 1449 break; 1450 case 13: 1451 (void)printf("Communication prohibited"); 1452 break; 1453 case 14: 1454 (void)printf("Host precedence violation"); 1455 break; 1456 case 15: 1457 (void)printf("Precedence cutoff"); 1458 break; 1459 default: 1460 (void)printf("Bad Destination Unreachable Code: %d", 1461 icp->icmp_code); 1462 break; 1463 } 1464 /* Print returned IP header information */ 1465 pr_retip(icp, cc); 1466 break; 1467 1468 case ICMP_SOURCEQUENCH: 1469 if (!ck_pr_icmph(icp, from, cc, 1)) 1470 return 0; 1471 (void)printf("Source Quench"); 1472 pr_retip(icp, cc); 1473 break; 1474 1475 case ICMP_REDIRECT: 1476 if (!ck_pr_icmph(icp, from, cc, 1)) 1477 return 0; 1478 switch (icp->icmp_code) { 1479 case ICMP_REDIRECT_NET: 1480 (void)printf("Redirect Network"); 1481 break; 1482 case ICMP_REDIRECT_HOST: 1483 (void)printf("Redirect Host"); 1484 break; 1485 case ICMP_REDIRECT_TOSNET: 1486 (void)printf("Redirect Type of Service and Network"); 1487 break; 1488 case ICMP_REDIRECT_TOSHOST: 1489 (void)printf("Redirect Type of Service and Host"); 1490 break; 1491 default: 1492 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1493 break; 1494 } 1495 (void)printf(" New router addr: %s", 1496 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1497 pr_retip(icp, cc); 1498 break; 1499 1500 case ICMP_ECHO: 1501 if (!ck_pr_icmph(icp, from, cc, 0)) 1502 return 0; 1503 (void)printf("Echo Request: ID=%d seq=%d", 1504 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1505 break; 1506 1507 case ICMP_ECHOREPLY: 1508 /* displaying other's pings is too noisey */ 1509 #if 0 1510 if (!ck_pr_icmph(icp, from, cc, 0)) 1511 return 0; 1512 (void)printf("Echo Reply: ID=%d seq=%d", 1513 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1514 break; 1515 #else 1516 return 0; 1517 #endif 1518 1519 case ICMP_ROUTERADVERT: 1520 if (!ck_pr_icmph(icp, from, cc, 0)) 1521 return 0; 1522 (void)printf("Router Discovery Advert"); 1523 break; 1524 1525 case ICMP_ROUTERSOLICIT: 1526 if (!ck_pr_icmph(icp, from, cc, 0)) 1527 return 0; 1528 (void)printf("Router Discovery Solicit"); 1529 break; 1530 1531 case ICMP_TIMXCEED: 1532 if (!ck_pr_icmph(icp, from, cc, 1)) 1533 return 0; 1534 switch (icp->icmp_code ) { 1535 case ICMP_TIMXCEED_INTRANS: 1536 (void)printf("Time To Live exceeded"); 1537 break; 1538 case ICMP_TIMXCEED_REASS: 1539 (void)printf("Frag reassembly time exceeded"); 1540 break; 1541 default: 1542 (void)printf("Time exceeded, Bad Code: %d", 1543 icp->icmp_code); 1544 break; 1545 } 1546 pr_retip(icp, cc); 1547 break; 1548 1549 case ICMP_PARAMPROB: 1550 if (!ck_pr_icmph(icp, from, cc, 1)) 1551 return 0; 1552 (void)printf("Parameter problem: pointer = 0x%02x", 1553 icp->icmp_hun.ih_pptr); 1554 pr_retip(icp, cc); 1555 break; 1556 1557 case ICMP_TSTAMP: 1558 if (!ck_pr_icmph(icp, from, cc, 0)) 1559 return 0; 1560 (void)printf("Timestamp"); 1561 break; 1562 1563 case ICMP_TSTAMPREPLY: 1564 if (!ck_pr_icmph(icp, from, cc, 0)) 1565 return 0; 1566 (void)printf("Timestamp Reply"); 1567 break; 1568 1569 case ICMP_IREQ: 1570 if (!ck_pr_icmph(icp, from, cc, 0)) 1571 return 0; 1572 (void)printf("Information Request"); 1573 break; 1574 1575 case ICMP_IREQREPLY: 1576 if (!ck_pr_icmph(icp, from, cc, 0)) 1577 return 0; 1578 (void)printf("Information Reply"); 1579 break; 1580 1581 case ICMP_MASKREQ: 1582 if (!ck_pr_icmph(icp, from, cc, 0)) 1583 return 0; 1584 (void)printf("Address Mask Request"); 1585 break; 1586 1587 case ICMP_MASKREPLY: 1588 if (!ck_pr_icmph(icp, from, cc, 0)) 1589 return 0; 1590 (void)printf("Address Mask Reply"); 1591 break; 1592 1593 default: 1594 if (!ck_pr_icmph(icp, from, cc, 0)) 1595 return 0; 1596 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1597 if (pingflags & F_VERBOSE) 1598 pr_iph(icp, cc); 1599 } 1600 1601 return 1; 1602 } 1603 1604 1605 /* 1606 * Print an IP header with options. 1607 */ 1608 static void 1609 pr_iph(struct icmp *icp, 1610 int cc) 1611 { 1612 int hlen; 1613 u_char *cp; 1614 struct ip ipb, *ip = &ipb; 1615 1616 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1617 1618 hlen = ip->ip_hl << 2; 1619 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1620 1621 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1622 (void)printf(" %1x %1x %02x %04x %04x", 1623 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1624 (void)printf(" %1x %04x", 1625 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1626 (void)printf(" %02x %02x %04x", 1627 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1628 (void)printf(" %15s ", 1629 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1630 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1631 /* dump any option bytes */ 1632 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1633 (void)printf("%02x", *cp++); 1634 } 1635 } 1636 1637 /* 1638 * Print an ASCII host address starting from a string of bytes. 1639 */ 1640 static void 1641 pr_saddr(u_char *cp) 1642 { 1643 n_long l; 1644 struct in_addr addr; 1645 1646 l = (u_char)*++cp; 1647 l = (l<<8) + (u_char)*++cp; 1648 l = (l<<8) + (u_char)*++cp; 1649 l = (l<<8) + (u_char)*++cp; 1650 addr.s_addr = htonl(l); 1651 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1652 } 1653 1654 1655 /* 1656 * Return an ASCII host address 1657 * as a dotted quad and optionally with a hostname 1658 */ 1659 static char * 1660 pr_addr(struct in_addr *addr) /* in network order */ 1661 { 1662 struct hostent *hp; 1663 static char buf[MAXHOSTNAMELEN+4+16+1]; 1664 1665 if ((pingflags & F_NUMERIC) 1666 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1667 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1668 } else { 1669 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1670 inet_ntoa(*addr)); 1671 } 1672 1673 return buf; 1674 } 1675 1676 /* 1677 * Dump some info on a returned (via ICMP) IP packet. 1678 */ 1679 static void 1680 pr_retip(struct icmp *icp, 1681 int cc) 1682 { 1683 int hlen; 1684 u_char *cp; 1685 struct ip ipb, *ip = &ipb; 1686 1687 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1688 1689 if (pingflags & F_VERBOSE) 1690 pr_iph(icp, cc); 1691 1692 hlen = ip->ip_hl << 2; 1693 cp = (u_char *) &icp->icmp_data[hlen]; 1694 1695 if (ip->ip_p == IPPROTO_TCP) { 1696 if (pingflags & F_VERBOSE) 1697 (void)printf("\n TCP: from port %u, to port %u", 1698 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1699 } else if (ip->ip_p == IPPROTO_UDP) { 1700 if (pingflags & F_VERBOSE) 1701 (void)printf("\n UDP: from port %u, to port %u", 1702 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1703 } else if (ip->ip_p == IPPROTO_ICMP) { 1704 struct icmp icp2; 1705 (void) memcpy(&icp2, cp, sizeof(icp2)); 1706 if (icp2.icmp_type == ICMP_ECHO) { 1707 if (pingflags & F_VERBOSE) 1708 (void)printf("\n ID=%u icmp_seq=%u", 1709 ntohs((u_int16_t)icp2.icmp_id), 1710 ntohs((u_int16_t)icp2.icmp_seq)); 1711 else 1712 (void)printf(" for icmp_seq=%u", 1713 ntohs((u_int16_t)icp2.icmp_seq)); 1714 } 1715 } 1716 } 1717 1718 static void 1719 fill(void) 1720 { 1721 int i, j, k; 1722 char *cp; 1723 int pat[16]; 1724 1725 for (cp = fill_pat; *cp != '\0'; cp++) { 1726 if (!isxdigit((unsigned char)*cp)) 1727 break; 1728 } 1729 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1730 (void)fflush(stdout); 1731 errx(1, "\"-p %s\": patterns must be specified with" 1732 " 1-32 hex digits\n", 1733 fill_pat); 1734 } 1735 1736 i = sscanf(fill_pat, 1737 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1738 &pat[0], &pat[1], &pat[2], &pat[3], 1739 &pat[4], &pat[5], &pat[6], &pat[7], 1740 &pat[8], &pat[9], &pat[10], &pat[11], 1741 &pat[12], &pat[13], &pat[14], &pat[15]); 1742 1743 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1744 opack_icmp.icmp_data[k] = pat[j]; 1745 if (++j >= i) 1746 j = 0; 1747 } 1748 1749 if (!(pingflags & F_QUIET)) { 1750 (void)printf("PATTERN: 0x"); 1751 for (j=0; j<i; j++) 1752 (void)printf("%02x", 1753 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1754 (void)printf("\n"); 1755 } 1756 1757 } 1758 1759 1760 static void 1761 rnd_fill(void) 1762 { 1763 static u_int32_t rnd; 1764 int i; 1765 1766 for (i = PHDR_LEN; i < datalen; i++) { 1767 rnd = (3141592621U * rnd + 663896637U); 1768 opack_icmp.icmp_data[i] = rnd>>24; 1769 } 1770 } 1771 1772 1773 static void 1774 gethost(const char *arg, 1775 const char *name, 1776 struct sockaddr_in *sa, 1777 char *realname, 1778 int realname_len) 1779 { 1780 struct hostent *hp; 1781 1782 (void)memset(sa, 0, sizeof(*sa)); 1783 sa->sin_family = AF_INET; 1784 sa->sin_len = sizeof(struct sockaddr_in); 1785 1786 /* If it is an IP address, try to convert it to a name to 1787 * have something nice to display. 1788 */ 1789 if (inet_aton(name, &sa->sin_addr) != 0) { 1790 if (realname) { 1791 if (pingflags & F_NUMERIC) 1792 hp = 0; 1793 else 1794 hp = gethostbyaddr((char *)&sa->sin_addr, 1795 sizeof(sa->sin_addr), 1796 AF_INET); 1797 (void)strlcpy(realname, hp ? hp->h_name : name, 1798 realname_len); 1799 } 1800 return; 1801 } 1802 1803 hp = gethostbyname(name); 1804 if (!hp) 1805 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1806 1807 if (hp->h_addrtype != AF_INET) 1808 errx(1, "%s only supported with IP", arg); 1809 1810 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1811 1812 if (realname) 1813 (void)strlcpy(realname, hp->h_name, realname_len); 1814 } 1815 1816 1817 static void 1818 usage(void) 1819 { 1820 #ifdef IPSEC 1821 #ifdef IPSEC_POLICY_IPSEC 1822 #define IPSECOPT "\n [-E policy] " 1823 #else 1824 #define IPSECOPT "\n [-AE] " 1825 #endif /*IPSEC_POLICY_IPSEC*/ 1826 #else 1827 #define IPSECOPT "" 1828 #endif /*IPSEC*/ 1829 1830 (void)fprintf(stderr, "usage: \n" 1831 "%s [-adDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1832 " [-i interval] [-I addr]\n" 1833 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1834 " [-w maxwait] " IPSECOPT "host\n", 1835 getprogname()); 1836 exit(1); 1837 } 1838
Indexes created Tue Sep 30 20:09:53 GMT 2025