ping.c revision 1.81
1 /* $NetBSD: ping.c,v 1.81 2006/06/03 18:19:55 christos 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 1.81 2006/06/03 18:19:55 christos 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 setprogname(argv[0]); 260 261 #ifndef IPSEC 262 #define IPSECOPT 263 #else 264 #ifdef IPSEC_POLICY_IPSEC 265 #define IPSECOPT "E:" 266 #else 267 #define IPSECOPT "AE" 268 #endif /*IPSEC_POLICY_IPSEC*/ 269 #endif 270 while ((c = getopt(argc, argv, 271 "ac:dDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 272 #undef IPSECOPT 273 switch (c) { 274 case 'a': 275 pingflags |= F_AUDIBLE; 276 break; 277 case 'c': 278 npackets = strtol(optarg, &p, 0); 279 if (*p != '\0' || npackets <= 0) 280 errx(1, "Bad/invalid number of packets"); 281 break; 282 case 'D': 283 pingflags |= F_DF; 284 break; 285 case 'd': 286 options |= SO_DEBUG; 287 break; 288 case 'f': 289 pingflags |= F_FLOOD; 290 break; 291 case 'h': 292 hostind = optind-1; 293 break; 294 case 'i': /* wait between sending packets */ 295 interval = strtod(optarg, &p); 296 if (*p != '\0' || interval <= 0) 297 errx(1, "Bad/invalid interval %s", optarg); 298 break; 299 case 'l': 300 preload = strtol(optarg, &p, 0); 301 if (*p != '\0' || preload < 0) 302 errx(1, "Bad/invalid preload value %s", 303 optarg); 304 break; 305 case 'n': 306 pingflags |= F_NUMERIC; 307 break; 308 case 'o': 309 pingflags |= F_ONCE; 310 break; 311 case 'p': /* fill buffer with user pattern */ 312 if (pingflags & F_PING_RANDOM) 313 errx(1, "Only one of -P and -p allowed"); 314 pingflags |= F_PING_FILLED; 315 fill_pat = optarg; 316 break; 317 case 'P': 318 if (pingflags & F_PING_FILLED) 319 errx(1, "Only one of -P and -p allowed"); 320 pingflags |= F_PING_RANDOM; 321 break; 322 case 'q': 323 pingflags |= F_QUIET; 324 break; 325 case 'Q': 326 pingflags |= F_SEMI_QUIET; 327 break; 328 case 'r': 329 options |= SO_DONTROUTE; 330 break; 331 case 's': /* size of packet to send */ 332 datalen = strtol(optarg, &p, 0); 333 if (*p != '\0' || datalen < 0) 334 errx(1, "Bad/invalid packet size %s", optarg); 335 if (datalen > MAXPACKET) 336 errx(1, "packet size is too large"); 337 break; 338 case 'v': 339 pingflags |= F_VERBOSE; 340 break; 341 case 'R': 342 pingflags |= F_RECORD_ROUTE; 343 break; 344 case 'L': 345 pingflags |= F_MCAST_NOLOOP; 346 break; 347 case 't': 348 tos = strtoul(optarg, &p, 0); 349 if (*p != '\0' || tos > 0xFF) 350 errx(1, "bad tos value: %s", optarg); 351 break; 352 case 'T': 353 l = strtol(optarg, &p, 0); 354 if (*p != '\0' || l > 255 || l <= 0) 355 errx(1, "ttl out of range"); 356 ttl = (u_char)l; /* cannot check >255 otherwise */ 357 break; 358 case 'I': 359 pingflags |= F_SOURCE_ADDR; 360 gethost("-I", optarg, &src_addr, 0, 0); 361 break; 362 case 'g': 363 pingflags |= F_SOURCE_ROUTE; 364 gethost("-g", optarg, &send_addr, 0, 0); 365 break; 366 case 'w': 367 maxwait = strtod(optarg, &p); 368 if (*p != '\0' || maxwait <= 0) 369 errx(1, "Bad/invalid maxwait time %s", optarg); 370 break; 371 #ifdef IPSEC 372 #ifdef IPSEC_POLICY_IPSEC 373 case 'E': 374 pingflags |= F_POLICY; 375 if (!strncmp("in", optarg, 2)) { 376 policy_in = strdup(optarg); 377 if (!policy_in) 378 err(1, "strdup"); 379 } else if (!strncmp("out", optarg, 3)) { 380 policy_out = strdup(optarg); 381 if (!policy_out) 382 err(1, "strdup"); 383 } else 384 errx(1, "invalid security policy"); 385 break; 386 #else 387 case 'A': 388 pingflags |= F_AUTHHDR; 389 break; 390 case 'E': 391 pingflags |= F_ENCRYPT; 392 break; 393 #endif /*IPSEC_POLICY_IPSEC*/ 394 #endif /*IPSEC*/ 395 default: 396 usage(); 397 break; 398 } 399 } 400 401 if (interval == 0) 402 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 403 #ifndef sgi 404 if (pingflags & F_FLOOD && getuid()) 405 errx(1, "Must be superuser to use -f"); 406 if (interval < 1.0 && getuid()) 407 errx(1, "Must be superuser to use < 1 sec ping interval"); 408 if (preload > 0 && getuid()) 409 errx(1, "Must be superuser to use -l"); 410 #endif 411 sec_to_timeval(interval, &interval_tv); 412 413 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 414 warnx("Sorry, no audible output for flood pings"); 415 416 if (npackets != 0) { 417 npackets += preload; 418 } else { 419 npackets = INT_MAX; 420 } 421 422 if (hostind == 0) { 423 if (optind != argc-1) 424 usage(); 425 else 426 hostind = optind; 427 } 428 else if (hostind >= argc - 1) 429 usage(); 430 431 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 432 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 433 pingflags |= F_MCAST; 434 if (!(pingflags & F_SOURCE_ROUTE)) 435 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 436 437 loc_addr.sin_family = AF_INET; 438 loc_addr.sin_len = sizeof(struct sockaddr_in); 439 loc_addr.sin_addr.s_addr = htonl((127<<24)+1); 440 441 if (datalen >= PHDR_LEN) /* can we time them? */ 442 pingflags |= F_TIMING; 443 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 444 if ((packet = (u_char *)malloc(packlen)) == NULL) 445 err(1, "Out of memory"); 446 447 if (pingflags & F_PING_FILLED) { 448 fill(); 449 } else if (pingflags & F_PING_RANDOM) { 450 rnd_fill(); 451 } else { 452 for (i = PHDR_LEN; i < datalen; i++) 453 opack_icmp.icmp_data[i] = i; 454 } 455 456 ident = arc4random() & 0xFFFF; 457 458 if ((s = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 459 err(1, "Cannot create socket"); 460 if (options & SO_DEBUG) { 461 if (setsockopt(s, SOL_SOCKET, SO_DEBUG, 462 (char *)&on, sizeof(on)) == -1) 463 warn("Can't turn on socket debugging"); 464 } 465 if (options & SO_DONTROUTE) { 466 if (setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 467 (char *)&on, sizeof(on)) == -1) 468 warn("SO_DONTROUTE"); 469 } 470 471 if ((sloop = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 472 err(1, "Cannot create socket"); 473 if (options & SO_DEBUG) { 474 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 475 (char *)&on, sizeof(on)) == -1) 476 warn("Can't turn on socket debugging"); 477 } 478 if (options & SO_DONTROUTE) { 479 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 480 (char *)&on, sizeof(on)) == -1) 481 warn("SO_DONTROUTE"); 482 } 483 484 if (pingflags & F_SOURCE_ROUTE) { 485 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 486 optspace[IPOPT_OLEN] = optlen = 7; 487 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 488 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 489 sizeof(whereto.sin_addr)); 490 optspace[optlen++] = IPOPT_NOP; 491 } 492 if (pingflags & F_RECORD_ROUTE) { 493 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 494 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 495 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 496 optlen = MAX_IPOPTLEN; 497 } 498 /* this leaves opack_ip 0(mod 4) aligned */ 499 opack_ip = (struct ip *)((char *)&out_pack.o_ip 500 + sizeof(out_pack.o_opt) 501 - optlen); 502 (void) memcpy(opack_ip + 1, optspace, optlen); 503 504 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 505 err(1, "Can't set special IP header"); 506 507 opack_ip->ip_v = IPVERSION; 508 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 509 opack_ip->ip_tos = tos; 510 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 511 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 512 opack_ip->ip_p = IPPROTO_ICMP; 513 opack_ip->ip_src = src_addr.sin_addr; 514 opack_ip->ip_dst = send_addr.sin_addr; 515 516 if (pingflags & F_MCAST) { 517 if (pingflags & F_MCAST_NOLOOP) { 518 u_char loop = 0; 519 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 520 (char *) &loop, 1) < 0) 521 err(1, "Can't disable multicast loopback"); 522 } 523 524 if (ttl != 0 525 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 526 (char *) &ttl, 1) < 0) 527 err(1, "Can't set multicast time-to-live"); 528 529 if ((pingflags & F_SOURCE_ADDR) 530 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 531 (char *) &src_addr.sin_addr, 532 sizeof(src_addr.sin_addr)) < 0) 533 err(1, "Can't set multicast source interface"); 534 535 } else if (pingflags & F_SOURCE_ADDR) { 536 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 537 (char *) &src_addr.sin_addr, 538 sizeof(src_addr.sin_addr)) < 0) 539 err(1, "Can't set source interface/address"); 540 } 541 #ifdef IPSEC 542 #ifdef IPSEC_POLICY_IPSEC 543 { 544 char *buf; 545 if (pingflags & F_POLICY) { 546 if (policy_in != NULL) { 547 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 548 if (buf == NULL) 549 errx(1, "%s", ipsec_strerror()); 550 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 551 buf, ipsec_get_policylen(buf)) < 0) { 552 err(1, "ipsec policy cannot be configured"); 553 } 554 free(buf); 555 } 556 if (policy_out != NULL) { 557 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 558 if (buf == NULL) 559 errx(1, "%s", ipsec_strerror()); 560 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 561 buf, ipsec_get_policylen(buf)) < 0) { 562 err(1, "ipsec policy cannot be configured"); 563 } 564 free(buf); 565 } 566 } 567 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 568 if (buf == NULL) 569 errx(1, "%s", ipsec_strerror()); 570 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 571 buf, ipsec_get_policylen(buf)) < 0) { 572 #if 0 573 warnx("ipsec is not configured"); 574 #else 575 /* ignore it, should be okay */ 576 #endif 577 } 578 free(buf); 579 } 580 #else 581 { 582 int optval; 583 if (pingflags & F_AUTHHDR) { 584 optval = IPSEC_LEVEL_REQUIRE; 585 #ifdef IP_AUTH_TRANS_LEVEL 586 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 587 (char *)&optval, sizeof(optval)); 588 #else 589 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 590 (char *)&optval, sizeof(optval)); 591 #endif 592 } 593 if (pingflags & F_ENCRYPT) { 594 optval = IPSEC_LEVEL_REQUIRE; 595 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 596 (char *)&optval, sizeof(optval)); 597 } 598 optval = IPSEC_LEVEL_BYPASS; 599 #ifdef IP_AUTH_TRANS_LEVEL 600 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 601 (char *)&optval, sizeof(optval)); 602 #else 603 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 604 (char *)&optval, sizeof(optval)); 605 #endif 606 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 607 (char *)&optval, sizeof(optval)); 608 } 609 #endif /*IPSEC_POLICY_IPSEC*/ 610 #endif /*IPSEC*/ 611 612 (void)printf("PING %s (%s): %d data bytes\n", hostname, 613 inet_ntoa(whereto.sin_addr), datalen); 614 615 /* When pinging the broadcast address, you can get a lot 616 * of answers. Doing something so evil is useful if you 617 * are trying to stress the ethernet, or just want to 618 * fill the arp cache to get some stuff for /etc/ethers. 619 */ 620 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 621 (char*)&bufspace, sizeof(bufspace))) { 622 if ((bufspace -= 4096) <= 0) 623 err(1, "Cannot set the receive buffer size"); 624 } 625 626 /* make it possible to send giant probes, but do not worry now 627 * if it fails, since we probably won't send giant probes. 628 */ 629 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 630 (char*)&bufspace, sizeof(bufspace)); 631 632 (void)signal(SIGINT, prefinish); 633 634 #ifdef SIGINFO 635 sa.sa_handler = prtsig; 636 sa.sa_flags = SA_NOKERNINFO; 637 sigemptyset(&sa.sa_mask); 638 (void)sigaction(SIGINFO, &sa, NULL); 639 #else 640 (void)signal(SIGQUIT, prtsig); 641 #endif 642 (void)signal(SIGCONT, prtsig); 643 644 /* fire off them quickies */ 645 for (i = 0; i < preload; i++) { 646 (void)gettimeofday(&now, 0); 647 pinger(); 648 } 649 650 doit(); 651 return 0; 652 } 653 654 655 static void 656 doit(void) 657 { 658 int cc; 659 struct sockaddr_in from; 660 socklen_t fromlen; 661 double sec, last, d_last; 662 struct pollfd fdmaskp[1]; 663 664 (void)gettimeofday(&clear_cache,0); 665 if (maxwait != 0) { 666 last = timeval_to_sec(&clear_cache) + maxwait; 667 d_last = 0; 668 } else { 669 last = 0; 670 d_last = 365*24*60*60; 671 } 672 673 do { 674 (void)gettimeofday(&now,0); 675 676 if (last != 0) 677 d_last = last - timeval_to_sec(&now); 678 679 if (ntransmitted < npackets && d_last > 0) { 680 /* send if within 100 usec or late for next packet */ 681 sec = diffsec(&next_tx,&now); 682 if (sec <= 0.0001 || 683 (lastrcvd && (pingflags & F_FLOOD))) { 684 pinger(); 685 sec = diffsec(&next_tx,&now); 686 } 687 if (sec < 0.0) 688 sec = 0.0; 689 if (d_last < sec) 690 sec = d_last; 691 692 } else { 693 /* For the last response, wait twice as long as the 694 * worst case seen, or 10 times as long as the 695 * maximum interpacket interval, whichever is longer. 696 */ 697 sec = MAX(2 * tmax, 10 * interval) - 698 diffsec(&now, &last_tx); 699 if (d_last < sec) 700 sec = d_last; 701 if (sec <= 0) 702 break; 703 } 704 705 706 fdmaskp[0].fd = s; 707 fdmaskp[0].events = POLLIN; 708 cc = poll(fdmaskp, 1, (int)(sec * 1000)); 709 if (cc <= 0) { 710 if (cc < 0) { 711 if (errno == EINTR) 712 continue; 713 jiggle_flush(1); 714 err(1, "poll"); 715 } 716 continue; 717 } 718 719 fromlen = sizeof(from); 720 cc = recvfrom(s, (char *) packet, packlen, 721 0, (struct sockaddr *)&from, 722 &fromlen); 723 if (cc < 0) { 724 if (errno != EINTR) { 725 jiggle_flush(1); 726 warn("recvfrom"); 727 (void)fflush(stderr); 728 } 729 continue; 730 } 731 (void)gettimeofday(&now, 0); 732 pr_pack(packet, cc, &from); 733 734 } while (nreceived < npackets 735 && (nreceived == 0 || !(pingflags & F_ONCE))); 736 737 finish(0); 738 } 739 740 741 static void 742 jiggle_flush(int nl) /* new line if there are dots */ 743 { 744 int serrno = errno; 745 746 if (jiggle_cnt > 0) { 747 total_jiggled += jiggle_cnt; 748 jiggle_direction = 1; 749 do { 750 (void)putchar('.'); 751 } while (--jiggle_cnt > 0); 752 753 } else if (jiggle_cnt < 0) { 754 total_jiggled -= jiggle_cnt; 755 jiggle_direction = -1; 756 do { 757 (void)putchar('\b'); 758 } while (++jiggle_cnt < 0); 759 } 760 761 if (nl) { 762 if (total_jiggled != 0) 763 (void)putchar('\n'); 764 total_jiggled = 0; 765 jiggle_direction = -1; 766 } 767 768 (void)fflush(stdout); 769 (void)fflush(stderr); 770 jiggle_time = now; 771 errno = serrno; 772 } 773 774 775 /* jiggle the cursor for flood-ping 776 */ 777 static void 778 jiggle(int delta) 779 { 780 double dt; 781 782 if (pingflags & F_QUIET) 783 return; 784 785 /* do not back up into messages */ 786 if (total_jiggled+jiggle_cnt+delta < 0) 787 return; 788 789 jiggle_cnt += delta; 790 791 /* flush the FLOOD dots when things are quiet 792 * or occassionally to make the cursor jiggle. 793 */ 794 dt = diffsec(&last_tx, &jiggle_time); 795 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 796 jiggle_flush(0); 797 } 798 799 800 /* 801 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 802 * will be added on by the kernel. The ID field is our UNIX process ID, 803 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 804 * of the data portion are used to hold a UNIX "timeval" struct in VAX 805 * byte-order, to compute the round-trip time. 806 */ 807 static void 808 pinger(void) 809 { 810 struct tv32 tv32; 811 int i, cc, sw; 812 813 opack_icmp.icmp_code = 0; 814 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 815 816 /* clear the cached route in the kernel after an ICMP 817 * response such as a Redirect is seen to stop causing 818 * more such packets. Also clear the cached route 819 * periodically in case of routing changes that make 820 * black holes come and go. 821 */ 822 if (clear_cache.tv_sec != now.tv_sec) { 823 opack_icmp.icmp_type = ICMP_ECHOREPLY; 824 opack_icmp.icmp_id = ~ident; 825 opack_icmp.icmp_cksum = 0; 826 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 827 PHDR_LEN); 828 sw = 0; 829 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 830 (char *)&sw,sizeof(sw)) < 0) 831 err(1, "Can't turn off special IP header"); 832 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 833 (struct sockaddr *)&loc_addr, 834 sizeof(struct sockaddr_in)) < 0) { 835 /* 836 * XXX: we only report this as a warning in verbose 837 * mode because people get confused when they see 838 * this error when they are running in single user 839 * mode and they have not configured lo0 840 */ 841 if (pingflags & F_VERBOSE) 842 warn("failed to clear cached route"); 843 } 844 sw = 1; 845 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 846 (char *)&sw, sizeof(sw)) < 0) 847 err(1, "Can't set special IP header"); 848 849 (void)gettimeofday(&clear_cache,0); 850 } 851 852 opack_icmp.icmp_type = ICMP_ECHO; 853 opack_icmp.icmp_id = ident; 854 tv32.tv32_sec = htonl(now.tv_sec); 855 tv32.tv32_usec = htonl(now.tv_usec); 856 if (pingflags & F_TIMING) 857 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 858 cc = datalen + PHDR_LEN; 859 opack_icmp.icmp_cksum = 0; 860 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 861 862 cc += opack_ip->ip_hl<<2; 863 opack_ip->ip_len = cc; 864 i = sendto(s, (char *) opack_ip, cc, 0, 865 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 866 if (i != cc) { 867 jiggle_flush(1); 868 if (i < 0) 869 warn("sendto"); 870 else 871 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 872 (void)fflush(stderr); 873 } 874 lastrcvd = 0; 875 876 CLR(ntransmitted); 877 ntransmitted++; 878 879 last_tx = now; 880 if (next_tx.tv_sec == 0) { 881 first_tx = now; 882 next_tx = now; 883 } 884 885 /* Transmit regularly, at always the same microsecond in the 886 * second when going at one packet per second. 887 * If we are at most 100 ms behind, send extras to get caught up. 888 * Otherwise, skip packets we were too slow to send. 889 */ 890 if (diffsec(&next_tx, &now) <= interval) { 891 do { 892 timevaladd(&next_tx, &interval_tv); 893 } while (diffsec(&next_tx, &now) < -0.1); 894 } 895 896 if (pingflags & F_FLOOD) 897 jiggle(1); 898 899 /* While the packet is going out, ready buffer for the next 900 * packet. Use a fast but not very good random number generator. 901 */ 902 if (pingflags & F_PING_RANDOM) 903 rnd_fill(); 904 } 905 906 907 static void 908 pr_pack_sub(int cc, 909 char *addr, 910 int seqno, 911 int dupflag, 912 int ttl, 913 double triptime) 914 { 915 jiggle_flush(1); 916 917 if (pingflags & F_FLOOD) 918 return; 919 920 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 921 if (dupflag) 922 (void)printf(" DUP!"); 923 (void)printf(" ttl=%d", ttl); 924 if (pingflags & F_TIMING) 925 (void)printf(" time=%.3f ms", triptime*1000.0); 926 927 /* 928 * Send beep to stderr, since that's more likely than stdout 929 * to go to a terminal.. 930 */ 931 if (pingflags & F_AUDIBLE && !dupflag) 932 (void)fprintf(stderr,"\a"); 933 } 934 935 936 /* 937 * Print out the packet, if it came from us. This logic is necessary 938 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 939 * which arrive ('tis only fair). This permits multiple copies of this 940 * program to be run without having intermingled output (or statistics!). 941 */ 942 static void 943 pr_pack(u_char *buf, 944 int tot_len, 945 struct sockaddr_in *from) 946 { 947 struct ip *ip; 948 struct icmp *icp; 949 int i, j, net_len; 950 u_char *cp; 951 static int old_rrlen; 952 static char old_rr[MAX_IPOPTLEN]; 953 int hlen, dupflag = 0, dumped; 954 double triptime = 0.0; 955 #define PR_PACK_SUB() {if (!dumped) { \ 956 dumped = 1; \ 957 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 958 ntohs((u_int16_t)icp->icmp_seq), \ 959 dupflag, ip->ip_ttl, triptime);}} 960 961 /* Check the IP header */ 962 ip = (struct ip *) buf; 963 hlen = ip->ip_hl << 2; 964 if (tot_len < hlen + ICMP_MINLEN) { 965 if (pingflags & F_VERBOSE) { 966 jiggle_flush(1); 967 (void)printf("packet too short (%d bytes) from %s\n", 968 tot_len, inet_ntoa(from->sin_addr)); 969 } 970 return; 971 } 972 973 /* Now the ICMP part */ 974 dumped = 0; 975 net_len = tot_len - hlen; 976 icp = (struct icmp *)(buf + hlen); 977 if (icp->icmp_type == ICMP_ECHOREPLY 978 && icp->icmp_id == ident) { 979 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 980 lastrcvd = 1; 981 last_rx = now; 982 if (first_rx.tv_sec == 0) 983 first_rx = last_rx; 984 nreceived++; 985 if (pingflags & F_TIMING) { 986 struct timeval tv; 987 struct tv32 tv32; 988 989 (void) memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 990 tv.tv_sec = ntohl(tv32.tv32_sec); 991 tv.tv_usec = ntohl(tv32.tv32_usec); 992 triptime = diffsec(&last_rx, &tv); 993 tsum += triptime; 994 tsumsq += triptime * triptime; 995 if (triptime < tmin) 996 tmin = triptime; 997 if (triptime > tmax) 998 tmax = triptime; 999 } 1000 1001 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1002 nrepeats++, nreceived--; 1003 dupflag=1; 1004 } else { 1005 SET(ntohs((u_int16_t)icp->icmp_seq)); 1006 } 1007 1008 if (tot_len != opack_ip->ip_len) { 1009 PR_PACK_SUB(); 1010 (void)printf("\nwrong total length %d instead of %d", 1011 tot_len, opack_ip->ip_len); 1012 } 1013 1014 if (!dupflag) { 1015 static u_int16_t last_seqno = 0xffff; 1016 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1017 u_int16_t gap = seqno - (last_seqno + 1); 1018 if (gap > 0 && gap < 0x8000 && 1019 (pingflags & F_VERBOSE)) { 1020 (void)printf("[*** sequence gap of %u " 1021 "packets from %u ... %u ***]\n", gap, 1022 (u_int16_t) (last_seqno + 1), 1023 (u_int16_t) (seqno - 1)); 1024 if (pingflags & F_QUIET) 1025 summary(0); 1026 } 1027 1028 if (gap < 0x8000) 1029 last_seqno = seqno; 1030 } 1031 1032 if (pingflags & F_QUIET) 1033 return; 1034 1035 if (!(pingflags & F_FLOOD)) 1036 PR_PACK_SUB(); 1037 1038 /* check the data */ 1039 if (datalen > PHDR_LEN 1040 && !(pingflags & F_PING_RANDOM) 1041 && memcmp(&icp->icmp_data[PHDR_LEN], 1042 &opack_icmp.icmp_data[PHDR_LEN], 1043 datalen-PHDR_LEN)) { 1044 for (i=PHDR_LEN; i<datalen; i++) { 1045 if (icp->icmp_data[i] != 1046 opack_icmp.icmp_data[i]) 1047 break; 1048 } 1049 PR_PACK_SUB(); 1050 (void)printf("\nwrong data byte #%d should have been" 1051 " %#x but was %#x", i, 1052 (u_char)opack_icmp.icmp_data[i], 1053 (u_char)icp->icmp_data[i]); 1054 for (i=PHDR_LEN; i<datalen; i++) { 1055 if ((i%16) == PHDR_LEN) 1056 (void)printf("\n\t"); 1057 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1058 } 1059 } 1060 1061 } else { 1062 if (!pr_icmph(icp, from, net_len)) 1063 return; 1064 dumped = 2; 1065 } 1066 1067 /* Display any IP options */ 1068 cp = buf + sizeof(struct ip); 1069 while (hlen > (int)sizeof(struct ip)) { 1070 switch (*cp) { 1071 case IPOPT_EOL: 1072 hlen = 0; 1073 break; 1074 case IPOPT_LSRR: 1075 hlen -= 2; 1076 j = *++cp; 1077 ++cp; 1078 j -= IPOPT_MINOFF; 1079 if (j <= 0) 1080 continue; 1081 if (dumped <= 1) { 1082 j = ((j+3)/4)*4; 1083 hlen -= j; 1084 cp += j; 1085 break; 1086 } 1087 PR_PACK_SUB(); 1088 (void)printf("\nLSRR: "); 1089 for (;;) { 1090 pr_saddr(cp); 1091 cp += 4; 1092 hlen -= 4; 1093 j -= 4; 1094 if (j <= 0) 1095 break; 1096 (void)putchar('\n'); 1097 } 1098 break; 1099 case IPOPT_RR: 1100 j = *++cp; /* get length */ 1101 i = *++cp; /* and pointer */ 1102 hlen -= 2; 1103 if (i > j) 1104 i = j; 1105 i -= IPOPT_MINOFF; 1106 if (i <= 0) 1107 continue; 1108 if (dumped <= 1) { 1109 if (i == old_rrlen 1110 && !memcmp(cp, old_rr, i)) { 1111 if (dumped) 1112 (void)printf("\t(same route)"); 1113 j = ((i+3)/4)*4; 1114 hlen -= j; 1115 cp += j; 1116 break; 1117 } 1118 old_rrlen = i; 1119 (void) memcpy(old_rr, cp, i); 1120 } 1121 if (!dumped) { 1122 jiggle_flush(1); 1123 (void)printf("RR: "); 1124 dumped = 1; 1125 } else { 1126 (void)printf("\nRR: "); 1127 } 1128 for (;;) { 1129 pr_saddr(cp); 1130 cp += 4; 1131 hlen -= 4; 1132 i -= 4; 1133 if (i <= 0) 1134 break; 1135 (void)putchar('\n'); 1136 } 1137 break; 1138 case IPOPT_NOP: 1139 if (dumped <= 1) 1140 break; 1141 PR_PACK_SUB(); 1142 (void)printf("\nNOP"); 1143 break; 1144 #ifdef sgi 1145 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1146 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1147 case IPOPT_CIPSO: /* Commercial IPSO */ 1148 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1149 i = (unsigned)cp[1]; 1150 hlen -= i - 1; 1151 PR_PACK_SUB(); 1152 (void)printf("\nSEC:"); 1153 while (i--) { 1154 (void)printf(" %02x", *cp++); 1155 } 1156 cp--; 1157 break; 1158 } 1159 #endif 1160 default: 1161 PR_PACK_SUB(); 1162 (void)printf("\nunknown option 0x%x", *cp); 1163 break; 1164 } 1165 hlen--; 1166 cp++; 1167 } 1168 1169 if (dumped) { 1170 (void)putchar('\n'); 1171 (void)fflush(stdout); 1172 } else { 1173 jiggle(-1); 1174 } 1175 } 1176 1177 1178 /* Compute the IP checksum 1179 * This assumes the packet is less than 32K long. 1180 */ 1181 static u_int16_t 1182 in_cksum(u_int16_t *p, u_int len) 1183 { 1184 u_int32_t sum = 0; 1185 int nwords = len >> 1; 1186 1187 while (nwords-- != 0) 1188 sum += *p++; 1189 1190 if (len & 1) { 1191 union { 1192 u_int16_t w; 1193 u_int8_t c[2]; 1194 } u; 1195 u.c[0] = *(u_char *)p; 1196 u.c[1] = 0; 1197 sum += u.w; 1198 } 1199 1200 /* end-around-carry */ 1201 sum = (sum >> 16) + (sum & 0xffff); 1202 sum += (sum >> 16); 1203 return (~sum); 1204 } 1205 1206 1207 /* 1208 * compute the difference of two timevals in seconds 1209 */ 1210 static double 1211 diffsec(struct timeval *timenow, 1212 struct timeval *then) 1213 { 1214 return ((timenow->tv_sec - then->tv_sec)*1.0 1215 + (timenow->tv_usec - then->tv_usec)/1000000.0); 1216 } 1217 1218 1219 static void 1220 timevaladd(struct timeval *t1, 1221 struct timeval *t2) 1222 { 1223 1224 t1->tv_sec += t2->tv_sec; 1225 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1226 t1->tv_sec++; 1227 t1->tv_usec -= 1000000; 1228 } 1229 } 1230 1231 1232 static void 1233 sec_to_timeval(const double sec, struct timeval *tp) 1234 { 1235 tp->tv_sec = sec; 1236 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1237 } 1238 1239 1240 static double 1241 timeval_to_sec(const struct timeval *tp) 1242 { 1243 return tp->tv_sec + tp->tv_usec / 1000000.0; 1244 } 1245 1246 1247 /* 1248 * Print statistics. 1249 * Heavily buffered STDIO is used here, so that all the statistics 1250 * will be written with 1 sys-write call. This is nice when more 1251 * than one copy of the program is running on a terminal; it prevents 1252 * the statistics output from becomming intermingled. 1253 */ 1254 static void 1255 summary(int header) 1256 { 1257 jiggle_flush(1); 1258 1259 if (header) 1260 (void)printf("\n----%s PING Statistics----\n", hostname); 1261 (void)printf("%d packets transmitted, ", ntransmitted); 1262 (void)printf("%d packets received, ", nreceived); 1263 if (nrepeats) 1264 (void)printf("+%d duplicates, ", nrepeats); 1265 if (ntransmitted) { 1266 if (nreceived > ntransmitted) 1267 (void)printf("-- somebody's duplicating packets!"); 1268 else 1269 (void)printf("%.1f%% packet loss", 1270 (((ntransmitted-nreceived)*100.0) / 1271 ntransmitted)); 1272 } 1273 (void)printf("\n"); 1274 if (nreceived && (pingflags & F_TIMING)) { 1275 double n = nreceived + nrepeats; 1276 double avg = (tsum / n); 1277 double variance = 0.0; 1278 if (n>1) 1279 variance = (tsumsq - n*avg*avg) /(n-1); 1280 1281 printf("round-trip min/avg/max/stddev = " 1282 "%.3f/%.3f/%.3f/%.3f ms\n", 1283 tmin * 1000.0, avg * 1000.0, 1284 tmax * 1000.0, sqrt(variance) * 1000.0); 1285 if (pingflags & F_FLOOD) { 1286 double r = diffsec(&last_rx, &first_rx); 1287 double t = diffsec(&last_tx, &first_tx); 1288 if (r == 0) 1289 r = 0.0001; 1290 if (t == 0) 1291 t = 0.0001; 1292 (void)printf(" %.1f packets/sec sent, " 1293 " %.1f packets/sec received\n", 1294 ntransmitted/t, nreceived/r); 1295 } 1296 } 1297 } 1298 1299 1300 /* 1301 * Print statistics when SIGINFO is received. 1302 */ 1303 /* ARGSUSED */ 1304 static void 1305 prtsig(int dummy) 1306 { 1307 abort(); 1308 summary(0); 1309 #ifndef SIGINFO 1310 (void)signal(SIGQUIT, prtsig); 1311 #endif 1312 } 1313 1314 1315 /* 1316 * On the first SIGINT, allow any outstanding packets to dribble in 1317 */ 1318 static void 1319 prefinish(int dummy) 1320 { 1321 if (lastrcvd /* quit now if caught up */ 1322 || nreceived == 0) /* or if remote is dead */ 1323 finish(0); 1324 1325 (void)signal(dummy, finish); /* do this only the 1st time */ 1326 1327 if (npackets > ntransmitted) /* let the normal limit work */ 1328 npackets = ntransmitted; 1329 } 1330 1331 /* 1332 * Print statistics and give up. 1333 */ 1334 /* ARGSUSED */ 1335 static void 1336 finish(int dummy) 1337 { 1338 #ifdef SIGINFO 1339 (void)signal(SIGINFO, SIG_DFL); 1340 #else 1341 (void)signal(SIGQUIT, SIG_DFL); 1342 #endif 1343 1344 summary(1); 1345 exit(nreceived > 0 ? 0 : 2); 1346 } 1347 1348 1349 static int /* 0=do not print it */ 1350 ck_pr_icmph(struct icmp *icp, 1351 struct sockaddr_in *from, 1352 int cc, 1353 int override) /* 1=override VERBOSE if interesting */ 1354 { 1355 int hlen; 1356 struct ip ipb, *ip = &ipb; 1357 struct icmp icp2b, *icp2 = &icp2b; 1358 int res; 1359 1360 if (pingflags & F_VERBOSE) { 1361 res = 1; 1362 jiggle_flush(1); 1363 } else { 1364 res = 0; 1365 } 1366 1367 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1368 hlen = ip->ip_hl << 2; 1369 if (ip->ip_p == IPPROTO_ICMP 1370 && hlen + 6 <= cc) { 1371 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1372 if (icp2->icmp_id == ident) { 1373 /* remember to clear route cached in kernel 1374 * if this non-Echo-Reply ICMP message was for one 1375 * of our packets. 1376 */ 1377 clear_cache.tv_sec = 0; 1378 1379 if (!res && override 1380 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1381 jiggle_flush(1); 1382 (void)printf("%d bytes from %s: ", 1383 cc, pr_addr(&from->sin_addr)); 1384 res = 1; 1385 } 1386 } 1387 } 1388 1389 return res; 1390 } 1391 1392 1393 /* 1394 * Print a descriptive string about an ICMP header other than an echo reply. 1395 */ 1396 static int /* 0=printed nothing */ 1397 pr_icmph(struct icmp *icp, 1398 struct sockaddr_in *from, 1399 int cc) 1400 { 1401 switch (icp->icmp_type ) { 1402 case ICMP_UNREACH: 1403 if (!ck_pr_icmph(icp, from, cc, 1)) 1404 return 0; 1405 switch (icp->icmp_code) { 1406 case ICMP_UNREACH_NET: 1407 (void)printf("Destination Net Unreachable"); 1408 break; 1409 case ICMP_UNREACH_HOST: 1410 (void)printf("Destination Host Unreachable"); 1411 break; 1412 case ICMP_UNREACH_PROTOCOL: 1413 (void)printf("Destination Protocol Unreachable"); 1414 break; 1415 case ICMP_UNREACH_PORT: 1416 (void)printf("Destination Port Unreachable"); 1417 break; 1418 case ICMP_UNREACH_NEEDFRAG: 1419 (void)printf("frag needed and DF set. Next MTU=%d", 1420 ntohs(icp->icmp_nextmtu)); 1421 break; 1422 case ICMP_UNREACH_SRCFAIL: 1423 (void)printf("Source Route Failed"); 1424 break; 1425 case ICMP_UNREACH_NET_UNKNOWN: 1426 (void)printf("Unreachable unknown net"); 1427 break; 1428 case ICMP_UNREACH_HOST_UNKNOWN: 1429 (void)printf("Unreachable unknown host"); 1430 break; 1431 case ICMP_UNREACH_ISOLATED: 1432 (void)printf("Unreachable host isolated"); 1433 break; 1434 case ICMP_UNREACH_NET_PROHIB: 1435 (void)printf("Net prohibited access"); 1436 break; 1437 case ICMP_UNREACH_HOST_PROHIB: 1438 (void)printf("Host prohibited access"); 1439 break; 1440 case ICMP_UNREACH_TOSNET: 1441 (void)printf("Bad TOS for net"); 1442 break; 1443 case ICMP_UNREACH_TOSHOST: 1444 (void)printf("Bad TOS for host"); 1445 break; 1446 case 13: 1447 (void)printf("Communication prohibited"); 1448 break; 1449 case 14: 1450 (void)printf("Host precedence violation"); 1451 break; 1452 case 15: 1453 (void)printf("Precedence cutoff"); 1454 break; 1455 default: 1456 (void)printf("Bad Destination Unreachable Code: %d", 1457 icp->icmp_code); 1458 break; 1459 } 1460 /* Print returned IP header information */ 1461 pr_retip(icp, cc); 1462 break; 1463 1464 case ICMP_SOURCEQUENCH: 1465 if (!ck_pr_icmph(icp, from, cc, 1)) 1466 return 0; 1467 (void)printf("Source Quench"); 1468 pr_retip(icp, cc); 1469 break; 1470 1471 case ICMP_REDIRECT: 1472 if (!ck_pr_icmph(icp, from, cc, 1)) 1473 return 0; 1474 switch (icp->icmp_code) { 1475 case ICMP_REDIRECT_NET: 1476 (void)printf("Redirect Network"); 1477 break; 1478 case ICMP_REDIRECT_HOST: 1479 (void)printf("Redirect Host"); 1480 break; 1481 case ICMP_REDIRECT_TOSNET: 1482 (void)printf("Redirect Type of Service and Network"); 1483 break; 1484 case ICMP_REDIRECT_TOSHOST: 1485 (void)printf("Redirect Type of Service and Host"); 1486 break; 1487 default: 1488 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1489 break; 1490 } 1491 (void)printf(" New router addr: %s", 1492 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1493 pr_retip(icp, cc); 1494 break; 1495 1496 case ICMP_ECHO: 1497 if (!ck_pr_icmph(icp, from, cc, 0)) 1498 return 0; 1499 (void)printf("Echo Request: ID=%d seq=%d", 1500 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1501 break; 1502 1503 case ICMP_ECHOREPLY: 1504 /* displaying other's pings is too noisey */ 1505 #if 0 1506 if (!ck_pr_icmph(icp, from, cc, 0)) 1507 return 0; 1508 (void)printf("Echo Reply: ID=%d seq=%d", 1509 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1510 break; 1511 #else 1512 return 0; 1513 #endif 1514 1515 case ICMP_ROUTERADVERT: 1516 if (!ck_pr_icmph(icp, from, cc, 0)) 1517 return 0; 1518 (void)printf("Router Discovery Advert"); 1519 break; 1520 1521 case ICMP_ROUTERSOLICIT: 1522 if (!ck_pr_icmph(icp, from, cc, 0)) 1523 return 0; 1524 (void)printf("Router Discovery Solicit"); 1525 break; 1526 1527 case ICMP_TIMXCEED: 1528 if (!ck_pr_icmph(icp, from, cc, 1)) 1529 return 0; 1530 switch (icp->icmp_code ) { 1531 case ICMP_TIMXCEED_INTRANS: 1532 (void)printf("Time To Live exceeded"); 1533 break; 1534 case ICMP_TIMXCEED_REASS: 1535 (void)printf("Frag reassembly time exceeded"); 1536 break; 1537 default: 1538 (void)printf("Time exceeded, Bad Code: %d", 1539 icp->icmp_code); 1540 break; 1541 } 1542 pr_retip(icp, cc); 1543 break; 1544 1545 case ICMP_PARAMPROB: 1546 if (!ck_pr_icmph(icp, from, cc, 1)) 1547 return 0; 1548 (void)printf("Parameter problem: pointer = 0x%02x", 1549 icp->icmp_hun.ih_pptr); 1550 pr_retip(icp, cc); 1551 break; 1552 1553 case ICMP_TSTAMP: 1554 if (!ck_pr_icmph(icp, from, cc, 0)) 1555 return 0; 1556 (void)printf("Timestamp"); 1557 break; 1558 1559 case ICMP_TSTAMPREPLY: 1560 if (!ck_pr_icmph(icp, from, cc, 0)) 1561 return 0; 1562 (void)printf("Timestamp Reply"); 1563 break; 1564 1565 case ICMP_IREQ: 1566 if (!ck_pr_icmph(icp, from, cc, 0)) 1567 return 0; 1568 (void)printf("Information Request"); 1569 break; 1570 1571 case ICMP_IREQREPLY: 1572 if (!ck_pr_icmph(icp, from, cc, 0)) 1573 return 0; 1574 (void)printf("Information Reply"); 1575 break; 1576 1577 case ICMP_MASKREQ: 1578 if (!ck_pr_icmph(icp, from, cc, 0)) 1579 return 0; 1580 (void)printf("Address Mask Request"); 1581 break; 1582 1583 case ICMP_MASKREPLY: 1584 if (!ck_pr_icmph(icp, from, cc, 0)) 1585 return 0; 1586 (void)printf("Address Mask Reply"); 1587 break; 1588 1589 default: 1590 if (!ck_pr_icmph(icp, from, cc, 0)) 1591 return 0; 1592 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1593 if (pingflags & F_VERBOSE) 1594 pr_iph(icp, cc); 1595 } 1596 1597 return 1; 1598 } 1599 1600 1601 /* 1602 * Print an IP header with options. 1603 */ 1604 static void 1605 pr_iph(struct icmp *icp, 1606 int cc) 1607 { 1608 int hlen; 1609 u_char *cp; 1610 struct ip ipb, *ip = &ipb; 1611 1612 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1613 1614 hlen = ip->ip_hl << 2; 1615 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1616 1617 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1618 (void)printf(" %1x %1x %02x %04x %04x", 1619 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1620 (void)printf(" %1x %04x", 1621 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1622 (void)printf(" %02x %02x %04x", 1623 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1624 (void)printf(" %15s ", 1625 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1626 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1627 /* dump any option bytes */ 1628 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1629 (void)printf("%02x", *cp++); 1630 } 1631 } 1632 1633 /* 1634 * Print an ASCII host address starting from a string of bytes. 1635 */ 1636 static void 1637 pr_saddr(u_char *cp) 1638 { 1639 n_long l; 1640 struct in_addr addr; 1641 1642 l = (u_char)*++cp; 1643 l = (l<<8) + (u_char)*++cp; 1644 l = (l<<8) + (u_char)*++cp; 1645 l = (l<<8) + (u_char)*++cp; 1646 addr.s_addr = htonl(l); 1647 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1648 } 1649 1650 1651 /* 1652 * Return an ASCII host address 1653 * as a dotted quad and optionally with a hostname 1654 */ 1655 static char * 1656 pr_addr(struct in_addr *addr) /* in network order */ 1657 { 1658 struct hostent *hp; 1659 static char buf[MAXHOSTNAMELEN+4+16+1]; 1660 1661 if ((pingflags & F_NUMERIC) 1662 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1663 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1664 } else { 1665 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1666 inet_ntoa(*addr)); 1667 } 1668 1669 return buf; 1670 } 1671 1672 /* 1673 * Dump some info on a returned (via ICMP) IP packet. 1674 */ 1675 static void 1676 pr_retip(struct icmp *icp, 1677 int cc) 1678 { 1679 int hlen; 1680 u_char *cp; 1681 struct ip ipb, *ip = &ipb; 1682 1683 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1684 1685 if (pingflags & F_VERBOSE) 1686 pr_iph(icp, cc); 1687 1688 hlen = ip->ip_hl << 2; 1689 cp = (u_char *) &icp->icmp_data[hlen]; 1690 1691 if (ip->ip_p == IPPROTO_TCP) { 1692 if (pingflags & F_VERBOSE) 1693 (void)printf("\n TCP: from port %u, to port %u", 1694 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1695 } else if (ip->ip_p == IPPROTO_UDP) { 1696 if (pingflags & F_VERBOSE) 1697 (void)printf("\n UDP: from port %u, to port %u", 1698 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1699 } else if (ip->ip_p == IPPROTO_ICMP) { 1700 struct icmp icp2; 1701 (void) memcpy(&icp2, cp, sizeof(icp2)); 1702 if (icp2.icmp_type == ICMP_ECHO) { 1703 if (pingflags & F_VERBOSE) 1704 (void)printf("\n ID=%u icmp_seq=%u", 1705 ntohs((u_int16_t)icp2.icmp_id), 1706 ntohs((u_int16_t)icp2.icmp_seq)); 1707 else 1708 (void)printf(" for icmp_seq=%u", 1709 ntohs((u_int16_t)icp2.icmp_seq)); 1710 } 1711 } 1712 } 1713 1714 static void 1715 fill(void) 1716 { 1717 int i, j, k; 1718 char *cp; 1719 int pat[16]; 1720 1721 for (cp = fill_pat; *cp != '\0'; cp++) { 1722 if (!isxdigit((unsigned char)*cp)) 1723 break; 1724 } 1725 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1726 (void)fflush(stdout); 1727 errx(1, "\"-p %s\": patterns must be specified with" 1728 " 1-32 hex digits\n", 1729 fill_pat); 1730 } 1731 1732 i = sscanf(fill_pat, 1733 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1734 &pat[0], &pat[1], &pat[2], &pat[3], 1735 &pat[4], &pat[5], &pat[6], &pat[7], 1736 &pat[8], &pat[9], &pat[10], &pat[11], 1737 &pat[12], &pat[13], &pat[14], &pat[15]); 1738 1739 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1740 opack_icmp.icmp_data[k] = pat[j]; 1741 if (++j >= i) 1742 j = 0; 1743 } 1744 1745 if (!(pingflags & F_QUIET)) { 1746 (void)printf("PATTERN: 0x"); 1747 for (j=0; j<i; j++) 1748 (void)printf("%02x", 1749 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1750 (void)printf("\n"); 1751 } 1752 1753 } 1754 1755 1756 static void 1757 rnd_fill(void) 1758 { 1759 static u_int32_t rnd; 1760 int i; 1761 1762 for (i = PHDR_LEN; i < datalen; i++) { 1763 rnd = (3141592621U * rnd + 663896637U); 1764 opack_icmp.icmp_data[i] = rnd>>24; 1765 } 1766 } 1767 1768 1769 static void 1770 gethost(const char *arg, 1771 const char *name, 1772 struct sockaddr_in *sa, 1773 char *realname, 1774 int realname_len) 1775 { 1776 struct hostent *hp; 1777 1778 (void)memset(sa, 0, sizeof(*sa)); 1779 sa->sin_family = AF_INET; 1780 sa->sin_len = sizeof(struct sockaddr_in); 1781 1782 /* If it is an IP address, try to convert it to a name to 1783 * have something nice to display. 1784 */ 1785 if (inet_aton(name, &sa->sin_addr) != 0) { 1786 if (realname) { 1787 if (pingflags & F_NUMERIC) 1788 hp = 0; 1789 else 1790 hp = gethostbyaddr((char *)&sa->sin_addr, 1791 sizeof(sa->sin_addr), 1792 AF_INET); 1793 (void)strlcpy(realname, hp ? hp->h_name : name, 1794 realname_len); 1795 } 1796 return; 1797 } 1798 1799 hp = gethostbyname(name); 1800 if (!hp) 1801 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1802 1803 if (hp->h_addrtype != AF_INET) 1804 errx(1, "%s only supported with IP", arg); 1805 1806 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1807 1808 if (realname) 1809 (void)strlcpy(realname, hp->h_name, realname_len); 1810 } 1811 1812 1813 static void 1814 usage(void) 1815 { 1816 #ifdef IPSEC 1817 #ifdef IPSEC_POLICY_IPSEC 1818 #define IPSECOPT "\n [-E policy] " 1819 #else 1820 #define IPSECOPT "\n [-AE] " 1821 #endif /*IPSEC_POLICY_IPSEC*/ 1822 #else 1823 #define IPSECOPT "" 1824 #endif /*IPSEC*/ 1825 1826 (void)fprintf(stderr, "usage: \n" 1827 "%s [-adDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1828 " [-i interval] [-I addr]\n" 1829 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1830 " [-w maxwait] " IPSECOPT "host\n", 1831 getprogname()); 1832 exit(1); 1833 } 1834
Indexes created Tue Sep 30 20:09:53 GMT 2025