1 /* $NetBSD: ping.c,v 1.87 2008/01/08 20:03:09 seanb 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 1.87 2008/01/08 20:03:09 seanb 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 #endif 93 94 #include <netinet/in_systm.h> 95 #include <netinet/in.h> 96 #include <netinet/ip.h> 97 #include <netinet/ip_icmp.h> 98 #include <netinet/ip_var.h> 99 #include <arpa/inet.h> 100 #include <ctype.h> 101 #include <netdb.h> 102 103 #ifdef IPSEC 104 #include <netinet6/ipsec.h> 105 #endif /*IPSEC*/ 106 107 #define FLOOD_INTVL 0.01 /* default flood output interval */ 108 #define MAXPACKET (IP_MAXPACKET-60-8) /* max packet size */ 109 110 #define F_VERBOSE 0x0001 111 #define F_QUIET 0x0002 /* minimize all output */ 112 #define F_SEMI_QUIET 0x0004 /* ignore our ICMP errors */ 113 #define F_FLOOD 0x0008 /* flood-ping */ 114 #define F_RECORD_ROUTE 0x0010 /* record route */ 115 #define F_SOURCE_ROUTE 0x0020 /* loose source route */ 116 #define F_PING_FILLED 0x0040 /* is buffer filled with user data? */ 117 #define F_PING_RANDOM 0x0080 /* use random data */ 118 #define F_NUMERIC 0x0100 /* do not do gethostbyaddr() calls */ 119 #define F_TIMING 0x0200 /* room for a timestamp */ 120 #define F_DF 0x0400 /* set IP DF bit */ 121 #define F_SOURCE_ADDR 0x0800 /* set source IP address/interface */ 122 #define F_ONCE 0x1000 /* exit(0) after receiving 1 reply */ 123 #define F_MCAST 0x2000 /* multicast target */ 124 #define F_MCAST_NOLOOP 0x4000 /* no multicast loopback */ 125 #define F_AUDIBLE 0x8000 /* audible output */ 126 #ifdef IPSEC 127 #ifdef IPSEC_POLICY_IPSEC 128 #define F_POLICY 0x10000 129 #else 130 #define F_AUTHHDR 0x10000 131 #define F_ENCRYPT 0x20000 132 #endif /*IPSEC_POLICY_IPSEC*/ 133 #endif /*IPSEC*/ 134 135 136 /* MAX_DUP_CHK is the number of bits in received table, the 137 * maximum number of received sequence numbers we can track to check 138 * for duplicates. 139 */ 140 #define MAX_DUP_CHK (8 * 2048) 141 u_char rcvd_tbl[MAX_DUP_CHK/8]; 142 int nrepeats = 0; 143 #define A(seq) rcvd_tbl[(seq/8)%sizeof(rcvd_tbl)] /* byte in array */ 144 #define B(seq) (1 << (seq & 0x07)) /* bit in byte */ 145 #define SET(seq) (A(seq) |= B(seq)) 146 #define CLR(seq) (A(seq) &= (~B(seq))) 147 #define TST(seq) (A(seq) & B(seq)) 148 149 struct tv32 { 150 int32_t tv32_sec; 151 int32_t tv32_usec; 152 }; 153 154 155 u_char *packet; 156 int packlen; 157 int pingflags = 0, options; 158 char *fill_pat; 159 160 int s; /* Socket file descriptor */ 161 int sloop; /* Socket file descriptor/loopback */ 162 163 #define PHDR_LEN sizeof(struct tv32) /* size of timestamp header */ 164 struct sockaddr_in whereto, send_addr; /* Who to ping */ 165 struct sockaddr_in src_addr; /* from where */ 166 struct sockaddr_in loc_addr; /* 127.1 */ 167 int datalen = 64 - PHDR_LEN; /* How much data */ 168 169 #ifndef __NetBSD__ 170 static char *progname; 171 #define getprogname() (progname) 172 #define setprogname(name) ((void)(progname = (name))) 173 #endif 174 175 char hostname[MAXHOSTNAMELEN]; 176 177 static struct { 178 struct ip o_ip; 179 char o_opt[MAX_IPOPTLEN]; 180 union { 181 u_char u_buf[MAXPACKET+offsetof(struct icmp, icmp_data)]; 182 struct icmp u_icmp; 183 } o_u; 184 } out_pack; 185 #define opack_icmp out_pack.o_u.u_icmp 186 struct ip *opack_ip; 187 188 char optspace[MAX_IPOPTLEN]; /* record route space */ 189 int optlen; 190 191 192 int npackets; /* total packets to send */ 193 int preload; /* number of packets to "preload" */ 194 int ntransmitted; /* output sequence # = #sent */ 195 int ident; /* our ID, in network byte order */ 196 197 int nreceived; /* # of packets we got back */ 198 199 double interval; /* interval between packets */ 200 struct timeval interval_tv; 201 double tmin = 999999999.0; 202 double tmax = 0.0; 203 double tsum = 0.0; /* sum of all times */ 204 double tsumsq = 0.0; 205 double maxwait = 0.0; 206 207 int bufspace = IP_MAXPACKET; 208 209 struct timeval now, clear_cache, last_tx, next_tx, first_tx; 210 struct timeval last_rx, first_rx; 211 int lastrcvd = 1; /* last ping sent has been received */ 212 213 static struct timeval jiggle_time; 214 static int jiggle_cnt, total_jiggled, jiggle_direction = -1; 215 216 static void doit(void); 217 static void prefinish(int); 218 static void prtsig(int); 219 static void finish(int); 220 static void summary(int); 221 static void pinger(void); 222 static void fill(void); 223 static void rnd_fill(void); 224 static double diffsec(struct timeval *, struct timeval *); 225 static void timevaladd(struct timeval *, struct timeval *); 226 static void sec_to_timeval(const double, struct timeval *); 227 static double timeval_to_sec(const struct timeval *); 228 static void pr_pack(u_char *, int, struct sockaddr_in *); 229 static u_int16_t in_cksum(u_int16_t *, u_int); 230 static void pr_saddr(u_char *); 231 static char *pr_addr(struct in_addr *); 232 static void pr_iph(struct icmp *, int); 233 static void pr_retip(struct icmp *, int); 234 static int pr_icmph(struct icmp *, struct sockaddr_in *, int); 235 static void jiggle(int), jiggle_flush(int); 236 static void gethost(const char *, const char *, 237 struct sockaddr_in *, char *, int); 238 static void usage(void); 239 240 int 241 main(int argc, char *argv[]) 242 { 243 int c, i, on = 1, hostind = 0; 244 long l; 245 u_char ttl = 0; 246 u_long tos = 0; 247 char *p; 248 #ifdef IPSEC 249 #ifdef IPSEC_POLICY_IPSEC 250 char *policy_in = NULL; 251 char *policy_out = NULL; 252 #endif 253 #endif 254 #ifdef SIGINFO 255 struct sigaction sa; 256 #endif 257 258 if ((s = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 259 err(1, "Cannot create socket"); 260 if ((sloop = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 261 err(1, "Cannot create socket"); 262 263 /* 264 * sloop is never read on. This prevents packets from 265 * queueing in its recv buffer. 266 */ 267 if (shutdown(sloop, SHUT_RD) == -1) 268 warn("Cannot shutdown for read"); 269 270 if (setuid(getuid()) == -1) 271 err(1, "setuid"); 272 273 setprogname(argv[0]); 274 275 #ifndef IPSEC 276 #define IPSECOPT 277 #else 278 #ifdef IPSEC_POLICY_IPSEC 279 #define IPSECOPT "E:" 280 #else 281 #define IPSECOPT "AE" 282 #endif /*IPSEC_POLICY_IPSEC*/ 283 #endif 284 while ((c = getopt(argc, argv, 285 "ac:dDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 286 #undef IPSECOPT 287 switch (c) { 288 case 'a': 289 pingflags |= F_AUDIBLE; 290 break; 291 case 'c': 292 npackets = strtol(optarg, &p, 0); 293 if (*p != '\0' || npackets <= 0) 294 errx(1, "Bad/invalid number of packets"); 295 break; 296 case 'D': 297 pingflags |= F_DF; 298 break; 299 case 'd': 300 options |= SO_DEBUG; 301 break; 302 case 'f': 303 pingflags |= F_FLOOD; 304 break; 305 case 'h': 306 hostind = optind-1; 307 break; 308 case 'i': /* wait between sending packets */ 309 interval = strtod(optarg, &p); 310 if (*p != '\0' || interval <= 0) 311 errx(1, "Bad/invalid interval %s", optarg); 312 break; 313 case 'l': 314 preload = strtol(optarg, &p, 0); 315 if (*p != '\0' || preload < 0) 316 errx(1, "Bad/invalid preload value %s", 317 optarg); 318 break; 319 case 'n': 320 pingflags |= F_NUMERIC; 321 break; 322 case 'o': 323 pingflags |= F_ONCE; 324 break; 325 case 'p': /* fill buffer with user pattern */ 326 if (pingflags & F_PING_RANDOM) 327 errx(1, "Only one of -P and -p allowed"); 328 pingflags |= F_PING_FILLED; 329 fill_pat = optarg; 330 break; 331 case 'P': 332 if (pingflags & F_PING_FILLED) 333 errx(1, "Only one of -P and -p allowed"); 334 pingflags |= F_PING_RANDOM; 335 break; 336 case 'q': 337 pingflags |= F_QUIET; 338 break; 339 case 'Q': 340 pingflags |= F_SEMI_QUIET; 341 break; 342 case 'r': 343 options |= SO_DONTROUTE; 344 break; 345 case 's': /* size of packet to send */ 346 datalen = strtol(optarg, &p, 0); 347 if (*p != '\0' || datalen < 0) 348 errx(1, "Bad/invalid packet size %s", optarg); 349 if (datalen > MAXPACKET) 350 errx(1, "packet size is too large"); 351 break; 352 case 'v': 353 pingflags |= F_VERBOSE; 354 break; 355 case 'R': 356 pingflags |= F_RECORD_ROUTE; 357 break; 358 case 'L': 359 pingflags |= F_MCAST_NOLOOP; 360 break; 361 case 't': 362 tos = strtoul(optarg, &p, 0); 363 if (*p != '\0' || tos > 0xFF) 364 errx(1, "bad tos value: %s", optarg); 365 break; 366 case 'T': 367 l = strtol(optarg, &p, 0); 368 if (*p != '\0' || l > 255 || l <= 0) 369 errx(1, "ttl out of range"); 370 ttl = (u_char)l; /* cannot check >255 otherwise */ 371 break; 372 case 'I': 373 pingflags |= F_SOURCE_ADDR; 374 gethost("-I", optarg, &src_addr, 0, 0); 375 break; 376 case 'g': 377 pingflags |= F_SOURCE_ROUTE; 378 gethost("-g", optarg, &send_addr, 0, 0); 379 break; 380 case 'w': 381 maxwait = strtod(optarg, &p); 382 if (*p != '\0' || maxwait <= 0) 383 errx(1, "Bad/invalid maxwait time %s", optarg); 384 break; 385 #ifdef IPSEC 386 #ifdef IPSEC_POLICY_IPSEC 387 case 'E': 388 pingflags |= F_POLICY; 389 if (!strncmp("in", optarg, 2)) { 390 policy_in = strdup(optarg); 391 if (!policy_in) 392 err(1, "strdup"); 393 } else if (!strncmp("out", optarg, 3)) { 394 policy_out = strdup(optarg); 395 if (!policy_out) 396 err(1, "strdup"); 397 } else 398 errx(1, "invalid security policy"); 399 break; 400 #else 401 case 'A': 402 pingflags |= F_AUTHHDR; 403 break; 404 case 'E': 405 pingflags |= F_ENCRYPT; 406 break; 407 #endif /*IPSEC_POLICY_IPSEC*/ 408 #endif /*IPSEC*/ 409 default: 410 usage(); 411 break; 412 } 413 } 414 415 if (interval == 0) 416 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 417 #ifndef sgi 418 if (pingflags & F_FLOOD && getuid()) 419 errx(1, "Must be superuser to use -f"); 420 if (interval < 1.0 && getuid()) 421 errx(1, "Must be superuser to use < 1 sec ping interval"); 422 if (preload > 0 && getuid()) 423 errx(1, "Must be superuser to use -l"); 424 #endif 425 sec_to_timeval(interval, &interval_tv); 426 427 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 428 warnx("Sorry, no audible output for flood pings"); 429 430 if (npackets != 0) { 431 npackets += preload; 432 } else { 433 npackets = INT_MAX; 434 } 435 436 if (hostind == 0) { 437 if (optind != argc-1) 438 usage(); 439 else 440 hostind = optind; 441 } 442 else if (hostind >= argc - 1) 443 usage(); 444 445 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 446 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 447 pingflags |= F_MCAST; 448 if (!(pingflags & F_SOURCE_ROUTE)) 449 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 450 451 loc_addr.sin_family = AF_INET; 452 loc_addr.sin_len = sizeof(struct sockaddr_in); 453 loc_addr.sin_addr.s_addr = htonl((127<<24)+1); 454 455 if (datalen >= PHDR_LEN) /* can we time them? */ 456 pingflags |= F_TIMING; 457 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 458 if ((packet = (u_char *)malloc(packlen)) == NULL) 459 err(1, "Out of memory"); 460 461 if (pingflags & F_PING_FILLED) { 462 fill(); 463 } else if (pingflags & F_PING_RANDOM) { 464 rnd_fill(); 465 } else { 466 for (i = PHDR_LEN; i < datalen; i++) 467 opack_icmp.icmp_data[i] = i; 468 } 469 470 ident = arc4random() & 0xFFFF; 471 472 if (options & SO_DEBUG) { 473 if (setsockopt(s, SOL_SOCKET, SO_DEBUG, 474 (char *)&on, sizeof(on)) == -1) 475 warn("Can't turn on socket debugging"); 476 } 477 if (options & SO_DONTROUTE) { 478 if (setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 479 (char *)&on, sizeof(on)) == -1) 480 warn("SO_DONTROUTE"); 481 } 482 483 if (options & SO_DEBUG) { 484 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 485 (char *)&on, sizeof(on)) == -1) 486 warn("Can't turn on socket debugging"); 487 } 488 if (options & SO_DONTROUTE) { 489 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 490 (char *)&on, sizeof(on)) == -1) 491 warn("SO_DONTROUTE"); 492 } 493 494 if (pingflags & F_SOURCE_ROUTE) { 495 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 496 optspace[IPOPT_OLEN] = optlen = 7; 497 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 498 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 499 sizeof(whereto.sin_addr)); 500 optspace[optlen++] = IPOPT_NOP; 501 } 502 if (pingflags & F_RECORD_ROUTE) { 503 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 504 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 505 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 506 optlen = MAX_IPOPTLEN; 507 } 508 /* this leaves opack_ip 0(mod 4) aligned */ 509 opack_ip = (struct ip *)((char *)&out_pack.o_ip 510 + sizeof(out_pack.o_opt) 511 - optlen); 512 (void) memcpy(opack_ip + 1, optspace, optlen); 513 514 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 515 err(1, "Can't set special IP header"); 516 517 opack_ip->ip_v = IPVERSION; 518 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 519 opack_ip->ip_tos = tos; 520 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 521 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 522 opack_ip->ip_p = IPPROTO_ICMP; 523 opack_ip->ip_src = src_addr.sin_addr; 524 opack_ip->ip_dst = send_addr.sin_addr; 525 526 if (pingflags & F_MCAST) { 527 if (pingflags & F_MCAST_NOLOOP) { 528 u_char loop = 0; 529 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 530 (char *) &loop, 1) < 0) 531 err(1, "Can't disable multicast loopback"); 532 } 533 534 if (ttl != 0 535 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 536 (char *) &ttl, 1) < 0) 537 err(1, "Can't set multicast time-to-live"); 538 539 if ((pingflags & F_SOURCE_ADDR) 540 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 541 (char *) &src_addr.sin_addr, 542 sizeof(src_addr.sin_addr)) < 0) 543 err(1, "Can't set multicast source interface"); 544 545 } else if (pingflags & F_SOURCE_ADDR) { 546 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 547 (char *) &src_addr.sin_addr, 548 sizeof(src_addr.sin_addr)) < 0) 549 err(1, "Can't set source interface/address"); 550 } 551 #ifdef IPSEC 552 #ifdef IPSEC_POLICY_IPSEC 553 { 554 char *buf; 555 if (pingflags & F_POLICY) { 556 if (policy_in != NULL) { 557 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 558 if (buf == NULL) 559 errx(1, "%s", ipsec_strerror()); 560 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 561 buf, ipsec_get_policylen(buf)) < 0) { 562 err(1, "ipsec policy cannot be configured"); 563 } 564 free(buf); 565 } 566 if (policy_out != NULL) { 567 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 568 if (buf == NULL) 569 errx(1, "%s", ipsec_strerror()); 570 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 571 buf, ipsec_get_policylen(buf)) < 0) { 572 err(1, "ipsec policy cannot be configured"); 573 } 574 free(buf); 575 } 576 } 577 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 578 if (buf == NULL) 579 errx(1, "%s", ipsec_strerror()); 580 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 581 buf, ipsec_get_policylen(buf)) < 0) { 582 #if 0 583 warnx("ipsec is not configured"); 584 #else 585 /* ignore it, should be okay */ 586 #endif 587 } 588 free(buf); 589 } 590 #else 591 { 592 int optval; 593 if (pingflags & F_AUTHHDR) { 594 optval = IPSEC_LEVEL_REQUIRE; 595 #ifdef IP_AUTH_TRANS_LEVEL 596 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 597 (char *)&optval, sizeof(optval)); 598 #else 599 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 600 (char *)&optval, sizeof(optval)); 601 #endif 602 } 603 if (pingflags & F_ENCRYPT) { 604 optval = IPSEC_LEVEL_REQUIRE; 605 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 606 (char *)&optval, sizeof(optval)); 607 } 608 optval = IPSEC_LEVEL_BYPASS; 609 #ifdef IP_AUTH_TRANS_LEVEL 610 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 611 (char *)&optval, sizeof(optval)); 612 #else 613 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 614 (char *)&optval, sizeof(optval)); 615 #endif 616 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 617 (char *)&optval, sizeof(optval)); 618 } 619 #endif /*IPSEC_POLICY_IPSEC*/ 620 #endif /*IPSEC*/ 621 622 (void)printf("PING %s (%s): %d data bytes\n", hostname, 623 inet_ntoa(whereto.sin_addr), datalen); 624 625 /* When pinging the broadcast address, you can get a lot 626 * of answers. Doing something so evil is useful if you 627 * are trying to stress the ethernet, or just want to 628 * fill the arp cache to get some stuff for /etc/ethers. 629 */ 630 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 631 (char*)&bufspace, sizeof(bufspace))) { 632 if ((bufspace -= 4096) <= 0) 633 err(1, "Cannot set the receive buffer size"); 634 } 635 636 /* make it possible to send giant probes, but do not worry now 637 * if it fails, since we probably won't send giant probes. 638 */ 639 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 640 (char*)&bufspace, sizeof(bufspace)); 641 642 (void)signal(SIGINT, prefinish); 643 644 #ifdef SIGINFO 645 sa.sa_handler = prtsig; 646 sa.sa_flags = SA_NOKERNINFO; 647 sigemptyset(&sa.sa_mask); 648 (void)sigaction(SIGINFO, &sa, NULL); 649 #else 650 (void)signal(SIGQUIT, prtsig); 651 #endif 652 (void)signal(SIGCONT, prtsig); 653 654 /* fire off them quickies */ 655 for (i = 0; i < preload; i++) { 656 (void)gettimeofday(&now, 0); 657 pinger(); 658 } 659 660 doit(); 661 return 0; 662 } 663 664 665 static void 666 doit(void) 667 { 668 int cc; 669 struct sockaddr_in from; 670 socklen_t fromlen; 671 double sec, last, d_last; 672 struct pollfd fdmaskp[1]; 673 674 (void)gettimeofday(&clear_cache,0); 675 if (maxwait != 0) { 676 last = timeval_to_sec(&clear_cache) + maxwait; 677 d_last = 0; 678 } else { 679 last = 0; 680 d_last = 365*24*60*60; 681 } 682 683 do { 684 (void)gettimeofday(&now,0); 685 686 if (last != 0) 687 d_last = last - timeval_to_sec(&now); 688 689 if (ntransmitted < npackets && d_last > 0) { 690 /* send if within 100 usec or late for next packet */ 691 sec = diffsec(&next_tx,&now); 692 if (sec <= 0.0001 || 693 (lastrcvd && (pingflags & F_FLOOD))) { 694 pinger(); 695 sec = diffsec(&next_tx,&now); 696 } 697 if (sec < 0.0) 698 sec = 0.0; 699 if (d_last < sec) 700 sec = d_last; 701 702 } else { 703 /* For the last response, wait twice as long as the 704 * worst case seen, or 10 times as long as the 705 * maximum interpacket interval, whichever is longer. 706 */ 707 sec = MAX(2 * tmax, 10 * interval) - 708 diffsec(&now, &last_tx); 709 if (d_last < sec) 710 sec = d_last; 711 if (sec <= 0) 712 break; 713 } 714 715 716 fdmaskp[0].fd = s; 717 fdmaskp[0].events = POLLIN; 718 cc = poll(fdmaskp, 1, (int)(sec * 1000)); 719 if (cc <= 0) { 720 if (cc < 0) { 721 if (errno == EINTR) 722 continue; 723 jiggle_flush(1); 724 err(1, "poll"); 725 } 726 continue; 727 } 728 729 fromlen = sizeof(from); 730 cc = recvfrom(s, (char *) packet, packlen, 731 0, (struct sockaddr *)&from, 732 &fromlen); 733 if (cc < 0) { 734 if (errno != EINTR) { 735 jiggle_flush(1); 736 warn("recvfrom"); 737 (void)fflush(stderr); 738 } 739 continue; 740 } 741 (void)gettimeofday(&now, 0); 742 pr_pack(packet, cc, &from); 743 744 } while (nreceived < npackets 745 && (nreceived == 0 || !(pingflags & F_ONCE))); 746 747 finish(0); 748 } 749 750 751 static void 752 jiggle_flush(int nl) /* new line if there are dots */ 753 { 754 int serrno = errno; 755 756 if (jiggle_cnt > 0) { 757 total_jiggled += jiggle_cnt; 758 jiggle_direction = 1; 759 do { 760 (void)putchar('.'); 761 } while (--jiggle_cnt > 0); 762 763 } else if (jiggle_cnt < 0) { 764 total_jiggled -= jiggle_cnt; 765 jiggle_direction = -1; 766 do { 767 (void)putchar('\b'); 768 } while (++jiggle_cnt < 0); 769 } 770 771 if (nl) { 772 if (total_jiggled != 0) 773 (void)putchar('\n'); 774 total_jiggled = 0; 775 jiggle_direction = -1; 776 } 777 778 (void)fflush(stdout); 779 (void)fflush(stderr); 780 jiggle_time = now; 781 errno = serrno; 782 } 783 784 785 /* jiggle the cursor for flood-ping 786 */ 787 static void 788 jiggle(int delta) 789 { 790 double dt; 791 792 if (pingflags & F_QUIET) 793 return; 794 795 /* do not back up into messages */ 796 if (total_jiggled+jiggle_cnt+delta < 0) 797 return; 798 799 jiggle_cnt += delta; 800 801 /* flush the FLOOD dots when things are quiet 802 * or occassionally to make the cursor jiggle. 803 */ 804 dt = diffsec(&last_tx, &jiggle_time); 805 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 806 jiggle_flush(0); 807 } 808 809 810 /* 811 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 812 * will be added on by the kernel. The ID field is our UNIX process ID, 813 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 814 * of the data portion are used to hold a UNIX "timeval" struct in VAX 815 * byte-order, to compute the round-trip time. 816 */ 817 static void 818 pinger(void) 819 { 820 struct tv32 tv32; 821 int i, cc, sw; 822 823 opack_icmp.icmp_code = 0; 824 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 825 826 /* clear the cached route in the kernel after an ICMP 827 * response such as a Redirect is seen to stop causing 828 * more such packets. Also clear the cached route 829 * periodically in case of routing changes that make 830 * black holes come and go. 831 */ 832 if (clear_cache.tv_sec != now.tv_sec) { 833 opack_icmp.icmp_type = ICMP_ECHOREPLY; 834 opack_icmp.icmp_id = ~ident; 835 opack_icmp.icmp_cksum = 0; 836 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 837 PHDR_LEN); 838 sw = 0; 839 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 840 (char *)&sw,sizeof(sw)) < 0) 841 err(1, "Can't turn off special IP header"); 842 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 843 (struct sockaddr *)&loc_addr, 844 sizeof(struct sockaddr_in)) < 0) { 845 /* 846 * XXX: we only report this as a warning in verbose 847 * mode because people get confused when they see 848 * this error when they are running in single user 849 * mode and they have not configured lo0 850 */ 851 if (pingflags & F_VERBOSE) 852 warn("failed to clear cached route"); 853 } 854 sw = 1; 855 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 856 (char *)&sw, sizeof(sw)) < 0) 857 err(1, "Can't set special IP header"); 858 859 (void)gettimeofday(&clear_cache,0); 860 } 861 862 opack_icmp.icmp_type = ICMP_ECHO; 863 opack_icmp.icmp_id = ident; 864 tv32.tv32_sec = htonl(now.tv_sec); 865 tv32.tv32_usec = htonl(now.tv_usec); 866 if (pingflags & F_TIMING) 867 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 868 cc = datalen + PHDR_LEN; 869 opack_icmp.icmp_cksum = 0; 870 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 871 872 cc += opack_ip->ip_hl<<2; 873 opack_ip->ip_len = cc; 874 i = sendto(s, (char *) opack_ip, cc, 0, 875 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 876 if (i != cc) { 877 jiggle_flush(1); 878 if (i < 0) 879 warn("sendto"); 880 else 881 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 882 (void)fflush(stderr); 883 } 884 lastrcvd = 0; 885 886 CLR(ntransmitted); 887 ntransmitted++; 888 889 last_tx = now; 890 if (next_tx.tv_sec == 0) { 891 first_tx = now; 892 next_tx = now; 893 } 894 895 /* Transmit regularly, at always the same microsecond in the 896 * second when going at one packet per second. 897 * If we are at most 100 ms behind, send extras to get caught up. 898 * Otherwise, skip packets we were too slow to send. 899 */ 900 if (diffsec(&next_tx, &now) <= interval) { 901 do { 902 timevaladd(&next_tx, &interval_tv); 903 } while (diffsec(&next_tx, &now) < -0.1); 904 } 905 906 if (pingflags & F_FLOOD) 907 jiggle(1); 908 909 /* While the packet is going out, ready buffer for the next 910 * packet. Use a fast but not very good random number generator. 911 */ 912 if (pingflags & F_PING_RANDOM) 913 rnd_fill(); 914 } 915 916 917 static void 918 pr_pack_sub(int cc, 919 char *addr, 920 int seqno, 921 int dupflag, 922 int ttl, 923 double triptime) 924 { 925 jiggle_flush(1); 926 927 if (pingflags & F_FLOOD) 928 return; 929 930 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 931 if (dupflag) 932 (void)printf(" DUP!"); 933 (void)printf(" ttl=%d", ttl); 934 if (pingflags & F_TIMING) 935 (void)printf(" time=%.3f ms", triptime*1000.0); 936 937 /* 938 * Send beep to stderr, since that's more likely than stdout 939 * to go to a terminal.. 940 */ 941 if (pingflags & F_AUDIBLE && !dupflag) 942 (void)fprintf(stderr,"\a"); 943 } 944 945 946 /* 947 * Print out the packet, if it came from us. This logic is necessary 948 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 949 * which arrive ('tis only fair). This permits multiple copies of this 950 * program to be run without having intermingled output (or statistics!). 951 */ 952 static void 953 pr_pack(u_char *buf, 954 int tot_len, 955 struct sockaddr_in *from) 956 { 957 struct ip *ip; 958 struct icmp *icp; 959 int i, j, net_len; 960 u_char *cp; 961 static int old_rrlen; 962 static char old_rr[MAX_IPOPTLEN]; 963 int hlen, dupflag = 0, dumped; 964 double triptime = 0.0; 965 #define PR_PACK_SUB() {if (!dumped) { \ 966 dumped = 1; \ 967 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 968 ntohs((u_int16_t)icp->icmp_seq), \ 969 dupflag, ip->ip_ttl, triptime);}} 970 971 /* Check the IP header */ 972 ip = (struct ip *) buf; 973 hlen = ip->ip_hl << 2; 974 if (tot_len < hlen + ICMP_MINLEN) { 975 if (pingflags & F_VERBOSE) { 976 jiggle_flush(1); 977 (void)printf("packet too short (%d bytes) from %s\n", 978 tot_len, inet_ntoa(from->sin_addr)); 979 } 980 return; 981 } 982 983 /* Now the ICMP part */ 984 dumped = 0; 985 net_len = tot_len - hlen; 986 icp = (struct icmp *)(buf + hlen); 987 if (icp->icmp_type == ICMP_ECHOREPLY 988 && icp->icmp_id == ident) { 989 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 990 lastrcvd = 1; 991 last_rx = now; 992 if (first_rx.tv_sec == 0) 993 first_rx = last_rx; 994 nreceived++; 995 if (pingflags & F_TIMING) { 996 struct timeval tv; 997 struct tv32 tv32; 998 999 (void) memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 1000 tv.tv_sec = ntohl(tv32.tv32_sec); 1001 tv.tv_usec = ntohl(tv32.tv32_usec); 1002 triptime = diffsec(&last_rx, &tv); 1003 tsum += triptime; 1004 tsumsq += triptime * triptime; 1005 if (triptime < tmin) 1006 tmin = triptime; 1007 if (triptime > tmax) 1008 tmax = triptime; 1009 } 1010 1011 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1012 nrepeats++, nreceived--; 1013 dupflag=1; 1014 } else { 1015 SET(ntohs((u_int16_t)icp->icmp_seq)); 1016 } 1017 1018 if (tot_len != opack_ip->ip_len) { 1019 PR_PACK_SUB(); 1020 (void)printf("\nwrong total length %d instead of %d", 1021 tot_len, opack_ip->ip_len); 1022 } 1023 1024 if (!dupflag) { 1025 static u_int16_t last_seqno = 0xffff; 1026 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1027 u_int16_t gap = seqno - (last_seqno + 1); 1028 if (gap > 0 && gap < 0x8000 && 1029 (pingflags & F_VERBOSE)) { 1030 (void)printf("[*** sequence gap of %u " 1031 "packets from %u ... %u ***]\n", gap, 1032 (u_int16_t) (last_seqno + 1), 1033 (u_int16_t) (seqno - 1)); 1034 if (pingflags & F_QUIET) 1035 summary(0); 1036 } 1037 1038 if (gap < 0x8000) 1039 last_seqno = seqno; 1040 } 1041 1042 if (pingflags & F_QUIET) 1043 return; 1044 1045 if (!(pingflags & F_FLOOD)) 1046 PR_PACK_SUB(); 1047 1048 /* check the data */ 1049 if (datalen > PHDR_LEN 1050 && !(pingflags & F_PING_RANDOM) 1051 && memcmp(&icp->icmp_data[PHDR_LEN], 1052 &opack_icmp.icmp_data[PHDR_LEN], 1053 datalen-PHDR_LEN)) { 1054 for (i=PHDR_LEN; i<datalen; i++) { 1055 if (icp->icmp_data[i] != 1056 opack_icmp.icmp_data[i]) 1057 break; 1058 } 1059 PR_PACK_SUB(); 1060 (void)printf("\nwrong data byte #%d should have been" 1061 " %#x but was %#x", i, 1062 (u_char)opack_icmp.icmp_data[i], 1063 (u_char)icp->icmp_data[i]); 1064 for (i=PHDR_LEN; i<datalen; i++) { 1065 if ((i%16) == PHDR_LEN) 1066 (void)printf("\n\t"); 1067 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1068 } 1069 } 1070 1071 } else { 1072 if (!pr_icmph(icp, from, net_len)) 1073 return; 1074 dumped = 2; 1075 } 1076 1077 /* Display any IP options */ 1078 cp = buf + sizeof(struct ip); 1079 while (hlen > (int)sizeof(struct ip)) { 1080 switch (*cp) { 1081 case IPOPT_EOL: 1082 hlen = 0; 1083 break; 1084 case IPOPT_LSRR: 1085 hlen -= 2; 1086 j = *++cp; 1087 ++cp; 1088 j -= IPOPT_MINOFF; 1089 if (j <= 0) 1090 continue; 1091 if (dumped <= 1) { 1092 j = ((j+3)/4)*4; 1093 hlen -= j; 1094 cp += j; 1095 break; 1096 } 1097 PR_PACK_SUB(); 1098 (void)printf("\nLSRR: "); 1099 for (;;) { 1100 pr_saddr(cp); 1101 cp += 4; 1102 hlen -= 4; 1103 j -= 4; 1104 if (j <= 0) 1105 break; 1106 (void)putchar('\n'); 1107 } 1108 break; 1109 case IPOPT_RR: 1110 j = *++cp; /* get length */ 1111 i = *++cp; /* and pointer */ 1112 hlen -= 2; 1113 if (i > j) 1114 i = j; 1115 i -= IPOPT_MINOFF; 1116 if (i <= 0) 1117 continue; 1118 if (dumped <= 1) { 1119 if (i == old_rrlen 1120 && !memcmp(cp, old_rr, i)) { 1121 if (dumped) 1122 (void)printf("\t(same route)"); 1123 j = ((i+3)/4)*4; 1124 hlen -= j; 1125 cp += j; 1126 break; 1127 } 1128 old_rrlen = i; 1129 (void) memcpy(old_rr, cp, i); 1130 } 1131 if (!dumped) { 1132 jiggle_flush(1); 1133 (void)printf("RR: "); 1134 dumped = 1; 1135 } else { 1136 (void)printf("\nRR: "); 1137 } 1138 for (;;) { 1139 pr_saddr(cp); 1140 cp += 4; 1141 hlen -= 4; 1142 i -= 4; 1143 if (i <= 0) 1144 break; 1145 (void)putchar('\n'); 1146 } 1147 break; 1148 case IPOPT_NOP: 1149 if (dumped <= 1) 1150 break; 1151 PR_PACK_SUB(); 1152 (void)printf("\nNOP"); 1153 break; 1154 #ifdef sgi 1155 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1156 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1157 case IPOPT_CIPSO: /* Commercial IPSO */ 1158 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1159 i = (unsigned)cp[1]; 1160 hlen -= i - 1; 1161 PR_PACK_SUB(); 1162 (void)printf("\nSEC:"); 1163 while (i--) { 1164 (void)printf(" %02x", *cp++); 1165 } 1166 cp--; 1167 break; 1168 } 1169 #endif 1170 default: 1171 PR_PACK_SUB(); 1172 (void)printf("\nunknown option 0x%x", *cp); 1173 break; 1174 } 1175 hlen--; 1176 cp++; 1177 } 1178 1179 if (dumped) { 1180 (void)putchar('\n'); 1181 (void)fflush(stdout); 1182 } else { 1183 jiggle(-1); 1184 } 1185 } 1186 1187 1188 /* Compute the IP checksum 1189 * This assumes the packet is less than 32K long. 1190 */ 1191 static u_int16_t 1192 in_cksum(u_int16_t *p, u_int len) 1193 { 1194 u_int32_t sum = 0; 1195 int nwords = len >> 1; 1196 1197 while (nwords-- != 0) 1198 sum += *p++; 1199 1200 if (len & 1) { 1201 union { 1202 u_int16_t w; 1203 u_int8_t c[2]; 1204 } u; 1205 u.c[0] = *(u_char *)p; 1206 u.c[1] = 0; 1207 sum += u.w; 1208 } 1209 1210 /* end-around-carry */ 1211 sum = (sum >> 16) + (sum & 0xffff); 1212 sum += (sum >> 16); 1213 return (~sum); 1214 } 1215 1216 1217 /* 1218 * compute the difference of two timevals in seconds 1219 */ 1220 static double 1221 diffsec(struct timeval *timenow, 1222 struct timeval *then) 1223 { 1224 return ((timenow->tv_sec - then->tv_sec)*1.0 1225 + (timenow->tv_usec - then->tv_usec)/1000000.0); 1226 } 1227 1228 1229 static void 1230 timevaladd(struct timeval *t1, 1231 struct timeval *t2) 1232 { 1233 1234 t1->tv_sec += t2->tv_sec; 1235 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1236 t1->tv_sec++; 1237 t1->tv_usec -= 1000000; 1238 } 1239 } 1240 1241 1242 static void 1243 sec_to_timeval(const double sec, struct timeval *tp) 1244 { 1245 tp->tv_sec = sec; 1246 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1247 } 1248 1249 1250 static double 1251 timeval_to_sec(const struct timeval *tp) 1252 { 1253 return tp->tv_sec + tp->tv_usec / 1000000.0; 1254 } 1255 1256 1257 /* 1258 * Print statistics. 1259 * Heavily buffered STDIO is used here, so that all the statistics 1260 * will be written with 1 sys-write call. This is nice when more 1261 * than one copy of the program is running on a terminal; it prevents 1262 * the statistics output from becomming intermingled. 1263 */ 1264 static void 1265 summary(int header) 1266 { 1267 jiggle_flush(1); 1268 1269 if (header) 1270 (void)printf("\n----%s PING Statistics----\n", hostname); 1271 (void)printf("%d packets transmitted, ", ntransmitted); 1272 (void)printf("%d packets received, ", nreceived); 1273 if (nrepeats) 1274 (void)printf("+%d duplicates, ", nrepeats); 1275 if (ntransmitted) { 1276 if (nreceived > ntransmitted) 1277 (void)printf("-- somebody's duplicating packets!"); 1278 else 1279 (void)printf("%.1f%% packet loss", 1280 (((ntransmitted-nreceived)*100.0) / 1281 ntransmitted)); 1282 } 1283 (void)printf("\n"); 1284 if (nreceived && (pingflags & F_TIMING)) { 1285 double n = nreceived + nrepeats; 1286 double avg = (tsum / n); 1287 double variance = 0.0; 1288 if (n>1) 1289 variance = (tsumsq - n*avg*avg) /(n-1); 1290 1291 printf("round-trip min/avg/max/stddev = " 1292 "%.3f/%.3f/%.3f/%.3f ms\n", 1293 tmin * 1000.0, avg * 1000.0, 1294 tmax * 1000.0, sqrt(variance) * 1000.0); 1295 if (pingflags & F_FLOOD) { 1296 double r = diffsec(&last_rx, &first_rx); 1297 double t = diffsec(&last_tx, &first_tx); 1298 if (r == 0) 1299 r = 0.0001; 1300 if (t == 0) 1301 t = 0.0001; 1302 (void)printf(" %.1f packets/sec sent, " 1303 " %.1f packets/sec received\n", 1304 ntransmitted/t, nreceived/r); 1305 } 1306 } 1307 } 1308 1309 1310 /* 1311 * Print statistics when SIGINFO is received. 1312 */ 1313 /* ARGSUSED */ 1314 static void 1315 prtsig(int dummy) 1316 { 1317 1318 summary(0); 1319 #ifndef SIGINFO 1320 (void)signal(SIGQUIT, prtsig); 1321 #endif 1322 } 1323 1324 1325 /* 1326 * On the first SIGINT, allow any outstanding packets to dribble in 1327 */ 1328 static void 1329 prefinish(int dummy) 1330 { 1331 if (lastrcvd /* quit now if caught up */ 1332 || nreceived == 0) /* or if remote is dead */ 1333 finish(0); 1334 1335 (void)signal(dummy, finish); /* do this only the 1st time */ 1336 1337 if (npackets > ntransmitted) /* let the normal limit work */ 1338 npackets = ntransmitted; 1339 } 1340 1341 /* 1342 * Print statistics and give up. 1343 */ 1344 /* ARGSUSED */ 1345 static void 1346 finish(int dummy) 1347 { 1348 #ifdef SIGINFO 1349 (void)signal(SIGINFO, SIG_DFL); 1350 #else 1351 (void)signal(SIGQUIT, SIG_DFL); 1352 #endif 1353 1354 summary(1); 1355 exit(nreceived > 0 ? 0 : 2); 1356 } 1357 1358 1359 static int /* 0=do not print it */ 1360 ck_pr_icmph(struct icmp *icp, 1361 struct sockaddr_in *from, 1362 int cc, 1363 int override) /* 1=override VERBOSE if interesting */ 1364 { 1365 int hlen; 1366 struct ip ipb, *ip = &ipb; 1367 struct icmp icp2b, *icp2 = &icp2b; 1368 int res; 1369 1370 if (pingflags & F_VERBOSE) { 1371 res = 1; 1372 jiggle_flush(1); 1373 } else { 1374 res = 0; 1375 } 1376 1377 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1378 hlen = ip->ip_hl << 2; 1379 if (ip->ip_p == IPPROTO_ICMP 1380 && hlen + 6 <= cc) { 1381 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1382 if (icp2->icmp_id == ident) { 1383 /* remember to clear route cached in kernel 1384 * if this non-Echo-Reply ICMP message was for one 1385 * of our packets. 1386 */ 1387 clear_cache.tv_sec = 0; 1388 1389 if (!res && override 1390 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1391 jiggle_flush(1); 1392 (void)printf("%d bytes from %s: ", 1393 cc, pr_addr(&from->sin_addr)); 1394 res = 1; 1395 } 1396 } 1397 } 1398 1399 return res; 1400 } 1401 1402 1403 /* 1404 * Print a descriptive string about an ICMP header other than an echo reply. 1405 */ 1406 static int /* 0=printed nothing */ 1407 pr_icmph(struct icmp *icp, 1408 struct sockaddr_in *from, 1409 int cc) 1410 { 1411 switch (icp->icmp_type ) { 1412 case ICMP_UNREACH: 1413 if (!ck_pr_icmph(icp, from, cc, 1)) 1414 return 0; 1415 switch (icp->icmp_code) { 1416 case ICMP_UNREACH_NET: 1417 (void)printf("Destination Net Unreachable"); 1418 break; 1419 case ICMP_UNREACH_HOST: 1420 (void)printf("Destination Host Unreachable"); 1421 break; 1422 case ICMP_UNREACH_PROTOCOL: 1423 (void)printf("Destination Protocol Unreachable"); 1424 break; 1425 case ICMP_UNREACH_PORT: 1426 (void)printf("Destination Port Unreachable"); 1427 break; 1428 case ICMP_UNREACH_NEEDFRAG: 1429 (void)printf("frag needed and DF set. Next MTU=%d", 1430 ntohs(icp->icmp_nextmtu)); 1431 break; 1432 case ICMP_UNREACH_SRCFAIL: 1433 (void)printf("Source Route Failed"); 1434 break; 1435 case ICMP_UNREACH_NET_UNKNOWN: 1436 (void)printf("Unreachable unknown net"); 1437 break; 1438 case ICMP_UNREACH_HOST_UNKNOWN: 1439 (void)printf("Unreachable unknown host"); 1440 break; 1441 case ICMP_UNREACH_ISOLATED: 1442 (void)printf("Unreachable host isolated"); 1443 break; 1444 case ICMP_UNREACH_NET_PROHIB: 1445 (void)printf("Net prohibited access"); 1446 break; 1447 case ICMP_UNREACH_HOST_PROHIB: 1448 (void)printf("Host prohibited access"); 1449 break; 1450 case ICMP_UNREACH_TOSNET: 1451 (void)printf("Bad TOS for net"); 1452 break; 1453 case ICMP_UNREACH_TOSHOST: 1454 (void)printf("Bad TOS for host"); 1455 break; 1456 case 13: 1457 (void)printf("Communication prohibited"); 1458 break; 1459 case 14: 1460 (void)printf("Host precedence violation"); 1461 break; 1462 case 15: 1463 (void)printf("Precedence cutoff"); 1464 break; 1465 default: 1466 (void)printf("Bad Destination Unreachable Code: %d", 1467 icp->icmp_code); 1468 break; 1469 } 1470 /* Print returned IP header information */ 1471 pr_retip(icp, cc); 1472 break; 1473 1474 case ICMP_SOURCEQUENCH: 1475 if (!ck_pr_icmph(icp, from, cc, 1)) 1476 return 0; 1477 (void)printf("Source Quench"); 1478 pr_retip(icp, cc); 1479 break; 1480 1481 case ICMP_REDIRECT: 1482 if (!ck_pr_icmph(icp, from, cc, 1)) 1483 return 0; 1484 switch (icp->icmp_code) { 1485 case ICMP_REDIRECT_NET: 1486 (void)printf("Redirect Network"); 1487 break; 1488 case ICMP_REDIRECT_HOST: 1489 (void)printf("Redirect Host"); 1490 break; 1491 case ICMP_REDIRECT_TOSNET: 1492 (void)printf("Redirect Type of Service and Network"); 1493 break; 1494 case ICMP_REDIRECT_TOSHOST: 1495 (void)printf("Redirect Type of Service and Host"); 1496 break; 1497 default: 1498 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1499 break; 1500 } 1501 (void)printf(" New router addr: %s", 1502 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1503 pr_retip(icp, cc); 1504 break; 1505 1506 case ICMP_ECHO: 1507 if (!ck_pr_icmph(icp, from, cc, 0)) 1508 return 0; 1509 (void)printf("Echo Request: ID=%d seq=%d", 1510 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1511 break; 1512 1513 case ICMP_ECHOREPLY: 1514 /* displaying other's pings is too noisey */ 1515 #if 0 1516 if (!ck_pr_icmph(icp, from, cc, 0)) 1517 return 0; 1518 (void)printf("Echo Reply: ID=%d seq=%d", 1519 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1520 break; 1521 #else 1522 return 0; 1523 #endif 1524 1525 case ICMP_ROUTERADVERT: 1526 if (!ck_pr_icmph(icp, from, cc, 0)) 1527 return 0; 1528 (void)printf("Router Discovery Advert"); 1529 break; 1530 1531 case ICMP_ROUTERSOLICIT: 1532 if (!ck_pr_icmph(icp, from, cc, 0)) 1533 return 0; 1534 (void)printf("Router Discovery Solicit"); 1535 break; 1536 1537 case ICMP_TIMXCEED: 1538 if (!ck_pr_icmph(icp, from, cc, 1)) 1539 return 0; 1540 switch (icp->icmp_code ) { 1541 case ICMP_TIMXCEED_INTRANS: 1542 (void)printf("Time To Live exceeded"); 1543 break; 1544 case ICMP_TIMXCEED_REASS: 1545 (void)printf("Frag reassembly time exceeded"); 1546 break; 1547 default: 1548 (void)printf("Time exceeded, Bad Code: %d", 1549 icp->icmp_code); 1550 break; 1551 } 1552 pr_retip(icp, cc); 1553 break; 1554 1555 case ICMP_PARAMPROB: 1556 if (!ck_pr_icmph(icp, from, cc, 1)) 1557 return 0; 1558 (void)printf("Parameter problem: pointer = 0x%02x", 1559 icp->icmp_hun.ih_pptr); 1560 pr_retip(icp, cc); 1561 break; 1562 1563 case ICMP_TSTAMP: 1564 if (!ck_pr_icmph(icp, from, cc, 0)) 1565 return 0; 1566 (void)printf("Timestamp"); 1567 break; 1568 1569 case ICMP_TSTAMPREPLY: 1570 if (!ck_pr_icmph(icp, from, cc, 0)) 1571 return 0; 1572 (void)printf("Timestamp Reply"); 1573 break; 1574 1575 case ICMP_IREQ: 1576 if (!ck_pr_icmph(icp, from, cc, 0)) 1577 return 0; 1578 (void)printf("Information Request"); 1579 break; 1580 1581 case ICMP_IREQREPLY: 1582 if (!ck_pr_icmph(icp, from, cc, 0)) 1583 return 0; 1584 (void)printf("Information Reply"); 1585 break; 1586 1587 case ICMP_MASKREQ: 1588 if (!ck_pr_icmph(icp, from, cc, 0)) 1589 return 0; 1590 (void)printf("Address Mask Request"); 1591 break; 1592 1593 case ICMP_MASKREPLY: 1594 if (!ck_pr_icmph(icp, from, cc, 0)) 1595 return 0; 1596 (void)printf("Address Mask Reply"); 1597 break; 1598 1599 default: 1600 if (!ck_pr_icmph(icp, from, cc, 0)) 1601 return 0; 1602 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1603 if (pingflags & F_VERBOSE) 1604 pr_iph(icp, cc); 1605 } 1606 1607 return 1; 1608 } 1609 1610 1611 /* 1612 * Print an IP header with options. 1613 */ 1614 static void 1615 pr_iph(struct icmp *icp, 1616 int cc) 1617 { 1618 int hlen; 1619 u_char *cp; 1620 struct ip ipb, *ip = &ipb; 1621 1622 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1623 1624 hlen = ip->ip_hl << 2; 1625 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1626 1627 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1628 (void)printf(" %1x %1x %02x %04x %04x", 1629 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1630 (void)printf(" %1x %04x", 1631 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1632 (void)printf(" %02x %02x %04x", 1633 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1634 (void)printf(" %15s ", 1635 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1636 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1637 /* dump any option bytes */ 1638 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1639 (void)printf("%02x", *cp++); 1640 } 1641 } 1642 1643 /* 1644 * Print an ASCII host address starting from a string of bytes. 1645 */ 1646 static void 1647 pr_saddr(u_char *cp) 1648 { 1649 n_long l; 1650 struct in_addr addr; 1651 1652 l = (u_char)*++cp; 1653 l = (l<<8) + (u_char)*++cp; 1654 l = (l<<8) + (u_char)*++cp; 1655 l = (l<<8) + (u_char)*++cp; 1656 addr.s_addr = htonl(l); 1657 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1658 } 1659 1660 1661 /* 1662 * Return an ASCII host address 1663 * as a dotted quad and optionally with a hostname 1664 */ 1665 static char * 1666 pr_addr(struct in_addr *addr) /* in network order */ 1667 { 1668 struct hostent *hp; 1669 static char buf[MAXHOSTNAMELEN+4+16+1]; 1670 1671 if ((pingflags & F_NUMERIC) 1672 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1673 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1674 } else { 1675 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1676 inet_ntoa(*addr)); 1677 } 1678 1679 return buf; 1680 } 1681 1682 /* 1683 * Dump some info on a returned (via ICMP) IP packet. 1684 */ 1685 static void 1686 pr_retip(struct icmp *icp, 1687 int cc) 1688 { 1689 int hlen; 1690 u_char *cp; 1691 struct ip ipb, *ip = &ipb; 1692 1693 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1694 1695 if (pingflags & F_VERBOSE) 1696 pr_iph(icp, cc); 1697 1698 hlen = ip->ip_hl << 2; 1699 cp = (u_char *) &icp->icmp_data[hlen]; 1700 1701 if (ip->ip_p == IPPROTO_TCP) { 1702 if (pingflags & F_VERBOSE) 1703 (void)printf("\n TCP: from port %u, to port %u", 1704 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1705 } else if (ip->ip_p == IPPROTO_UDP) { 1706 if (pingflags & F_VERBOSE) 1707 (void)printf("\n UDP: from port %u, to port %u", 1708 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1709 } else if (ip->ip_p == IPPROTO_ICMP) { 1710 struct icmp icp2; 1711 (void) memcpy(&icp2, cp, sizeof(icp2)); 1712 if (icp2.icmp_type == ICMP_ECHO) { 1713 if (pingflags & F_VERBOSE) 1714 (void)printf("\n ID=%u icmp_seq=%u", 1715 ntohs((u_int16_t)icp2.icmp_id), 1716 ntohs((u_int16_t)icp2.icmp_seq)); 1717 else 1718 (void)printf(" for icmp_seq=%u", 1719 ntohs((u_int16_t)icp2.icmp_seq)); 1720 } 1721 } 1722 } 1723 1724 static void 1725 fill(void) 1726 { 1727 int i, j, k; 1728 char *cp; 1729 int pat[16]; 1730 1731 for (cp = fill_pat; *cp != '\0'; cp++) { 1732 if (!isxdigit((unsigned char)*cp)) 1733 break; 1734 } 1735 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1736 (void)fflush(stdout); 1737 errx(1, "\"-p %s\": patterns must be specified with" 1738 " 1-32 hex digits\n", 1739 fill_pat); 1740 } 1741 1742 i = sscanf(fill_pat, 1743 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1744 &pat[0], &pat[1], &pat[2], &pat[3], 1745 &pat[4], &pat[5], &pat[6], &pat[7], 1746 &pat[8], &pat[9], &pat[10], &pat[11], 1747 &pat[12], &pat[13], &pat[14], &pat[15]); 1748 1749 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1750 opack_icmp.icmp_data[k] = pat[j]; 1751 if (++j >= i) 1752 j = 0; 1753 } 1754 1755 if (!(pingflags & F_QUIET)) { 1756 (void)printf("PATTERN: 0x"); 1757 for (j=0; j<i; j++) 1758 (void)printf("%02x", 1759 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1760 (void)printf("\n"); 1761 } 1762 1763 } 1764 1765 1766 static void 1767 rnd_fill(void) 1768 { 1769 static u_int32_t rnd; 1770 int i; 1771 1772 for (i = PHDR_LEN; i < datalen; i++) { 1773 rnd = (3141592621U * rnd + 663896637U); 1774 opack_icmp.icmp_data[i] = rnd>>24; 1775 } 1776 } 1777 1778 1779 static void 1780 gethost(const char *arg, 1781 const char *name, 1782 struct sockaddr_in *sa, 1783 char *realname, 1784 int realname_len) 1785 { 1786 struct hostent *hp; 1787 1788 (void)memset(sa, 0, sizeof(*sa)); 1789 sa->sin_family = AF_INET; 1790 sa->sin_len = sizeof(struct sockaddr_in); 1791 1792 /* If it is an IP address, try to convert it to a name to 1793 * have something nice to display. 1794 */ 1795 if (inet_aton(name, &sa->sin_addr) != 0) { 1796 if (realname) { 1797 if (pingflags & F_NUMERIC) 1798 hp = 0; 1799 else 1800 hp = gethostbyaddr((char *)&sa->sin_addr, 1801 sizeof(sa->sin_addr), 1802 AF_INET); 1803 (void)strlcpy(realname, hp ? hp->h_name : name, 1804 realname_len); 1805 } 1806 return; 1807 } 1808 1809 hp = gethostbyname(name); 1810 if (!hp) 1811 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1812 1813 if (hp->h_addrtype != AF_INET) 1814 errx(1, "%s only supported with IP", arg); 1815 1816 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1817 1818 if (realname) 1819 (void)strlcpy(realname, hp->h_name, realname_len); 1820 } 1821 1822 1823 static void 1824 usage(void) 1825 { 1826 #ifdef IPSEC 1827 #ifdef IPSEC_POLICY_IPSEC 1828 #define IPSECOPT "\n [-E policy] " 1829 #else 1830 #define IPSECOPT "\n [-AE] " 1831 #endif /*IPSEC_POLICY_IPSEC*/ 1832 #else 1833 #define IPSECOPT "" 1834 #endif /*IPSEC*/ 1835 1836 (void)fprintf(stderr, "usage: \n" 1837 "%s [-adDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1838 " [-i interval] [-I addr]\n" 1839 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1840 " [-w maxwait] " IPSECOPT "host\n", 1841 getprogname()); 1842 exit(1); 1843 } 1844