ping.c revision 1.73
1 /* $NetBSD: ping.c,v 1.73 2003/08/07 10:04:36 agc 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 1.73 2003/08/07 10:04:36 agc Exp $"); 62 #endif 63 64 #include <stdio.h> 65 #include <stddef.h> 66 #include <errno.h> 67 #include <sys/time.h> 68 #include <sys/types.h> 69 #include <sys/signal.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)) 149 150 151 152 u_char *packet; 153 int packlen; 154 int pingflags = 0, options; 155 char *fill_pat; 156 157 int s; /* Socket file descriptor */ 158 int sloop; /* Socket file descriptor/loopback */ 159 160 #define PHDR_LEN sizeof(struct timeval) /* size of timestamp header */ 161 struct sockaddr_in whereto, send_addr; /* Who to ping */ 162 struct sockaddr_in src_addr; /* from where */ 163 struct sockaddr_in loc_addr; /* 127.1 */ 164 int datalen = 64-PHDR_LEN; /* How much data */ 165 166 #ifndef __NetBSD__ 167 static char *progname; 168 #define getprogname() (progname) 169 #define setprogname(name) ((void)(progname = (name))) 170 #endif 171 172 char hostname[MAXHOSTNAMELEN]; 173 174 static struct { 175 struct ip o_ip; 176 char o_opt[MAX_IPOPTLEN]; 177 union { 178 u_char u_buf[MAXPACKET+offsetof(struct icmp, icmp_data)]; 179 struct icmp u_icmp; 180 } o_u; 181 } out_pack; 182 #define opack_icmp out_pack.o_u.u_icmp 183 struct ip *opack_ip; 184 185 char optspace[MAX_IPOPTLEN]; /* record route space */ 186 int optlen; 187 188 189 int npackets; /* total packets to send */ 190 int preload; /* number of packets to "preload" */ 191 int ntransmitted; /* output sequence # = #sent */ 192 int ident; /* our ID, in network byte order */ 193 194 int nreceived; /* # of packets we got back */ 195 196 double interval; /* interval between packets */ 197 struct timeval interval_tv; 198 double tmin = 999999999.0; 199 double tmax = 0.0; 200 double tsum = 0.0; /* sum of all times */ 201 double tsumsq = 0.0; 202 double maxwait = 0.0; 203 204 #ifdef SIGINFO 205 int reset_kerninfo; 206 #endif 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); 240 241 242 int 243 main(int argc, char *argv[]) 244 { 245 int c, i, on = 1, hostind = 0; 246 long l; 247 u_char ttl = 0; 248 u_long tos = 0; 249 char *p; 250 #ifdef SIGINFO 251 struct termios ts; 252 #endif 253 #ifdef IPSEC 254 #ifdef IPSEC_POLICY_IPSEC 255 char *policy_in = NULL; 256 char *policy_out = NULL; 257 #endif 258 #endif 259 260 261 setprogname(argv[0]); 262 263 #ifndef IPSEC 264 #define IPSECOPT 265 #else 266 #ifdef IPSEC_POLICY_IPSEC 267 #define IPSECOPT "E:" 268 #else 269 #define IPSECOPT "AE" 270 #endif /*IPSEC_POLICY_IPSEC*/ 271 #endif 272 while ((c = getopt(argc, argv, 273 "ac:dDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 274 #undef IPSECOPT 275 switch (c) { 276 case 'a': 277 pingflags |= F_AUDIBLE; 278 break; 279 case 'c': 280 npackets = strtol(optarg, &p, 0); 281 if (*p != '\0' || npackets <= 0) 282 errx(1, "Bad/invalid number of packets"); 283 break; 284 case 'D': 285 pingflags |= F_DF; 286 break; 287 case 'd': 288 options |= SO_DEBUG; 289 break; 290 case 'f': 291 pingflags |= F_FLOOD; 292 break; 293 case 'h': 294 hostind = optind-1; 295 break; 296 case 'i': /* wait between sending packets */ 297 interval = strtod(optarg, &p); 298 if (*p != '\0' || interval <= 0) 299 errx(1, "Bad/invalid interval %s", optarg); 300 break; 301 case 'l': 302 preload = strtol(optarg, &p, 0); 303 if (*p != '\0' || preload < 0) 304 errx(1, "Bad/invalid preload value %s", 305 optarg); 306 break; 307 case 'n': 308 pingflags |= F_NUMERIC; 309 break; 310 case 'o': 311 pingflags |= F_ONCE; 312 break; 313 case 'p': /* fill buffer with user pattern */ 314 if (pingflags & F_PING_RANDOM) 315 errx(1, "Only one of -P and -p allowed"); 316 pingflags |= F_PING_FILLED; 317 fill_pat = optarg; 318 break; 319 case 'P': 320 if (pingflags & F_PING_FILLED) 321 errx(1, "Only one of -P and -p allowed"); 322 pingflags |= F_PING_RANDOM; 323 break; 324 case 'q': 325 pingflags |= F_QUIET; 326 break; 327 case 'Q': 328 pingflags |= F_SEMI_QUIET; 329 break; 330 case 'r': 331 options |= SO_DONTROUTE; 332 break; 333 case 's': /* size of packet to send */ 334 datalen = strtol(optarg, &p, 0); 335 if (*p != '\0' || datalen < 0) 336 errx(1, "Bad/invalid packet size %s", optarg); 337 if (datalen > MAXPACKET) 338 errx(1, "packet size is too large"); 339 break; 340 case 'v': 341 pingflags |= F_VERBOSE; 342 break; 343 case 'R': 344 pingflags |= F_RECORD_ROUTE; 345 break; 346 case 'L': 347 pingflags |= F_MCAST_NOLOOP; 348 break; 349 case 't': 350 tos = strtoul(optarg, &p, 0); 351 if (*p != '\0' || tos > 0xFF) 352 errx(1, "bad tos value: %s", optarg); 353 break; 354 case 'T': 355 l = strtol(optarg, &p, 0); 356 if (*p != '\0' || l > 255 || l <= 0) 357 errx(1, "ttl out of range"); 358 ttl = (u_char)l; /* cannot check >255 otherwise */ 359 break; 360 case 'I': 361 pingflags |= F_SOURCE_ADDR; 362 gethost("-I", optarg, &src_addr, 0, 0); 363 break; 364 case 'g': 365 pingflags |= F_SOURCE_ROUTE; 366 gethost("-g", optarg, &send_addr, 0, 0); 367 break; 368 case 'w': 369 maxwait = strtod(optarg, &p); 370 if (*p != '\0' || maxwait <= 0) 371 errx(1, "Bad/invalid maxwait time %s", optarg); 372 break; 373 #ifdef IPSEC 374 #ifdef IPSEC_POLICY_IPSEC 375 case 'E': 376 pingflags |= F_POLICY; 377 if (!strncmp("in", optarg, 2)) { 378 policy_in = strdup(optarg); 379 if (!policy_in) 380 err(1, "strdup"); 381 } else if (!strncmp("out", optarg, 3)) { 382 policy_out = strdup(optarg); 383 if (!policy_out) 384 err(1, "strdup"); 385 } else 386 errx(1, "invalid security policy"); 387 break; 388 #else 389 case 'A': 390 pingflags |= F_AUTHHDR; 391 break; 392 case 'E': 393 pingflags |= F_ENCRYPT; 394 break; 395 #endif /*IPSEC_POLICY_IPSEC*/ 396 #endif /*IPSEC*/ 397 default: 398 usage(); 399 break; 400 } 401 } 402 403 if (interval == 0) 404 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 405 #ifndef sgi 406 if (pingflags & F_FLOOD && getuid()) 407 errx(1, "Must be superuser to use -f"); 408 if (interval < 1.0 && getuid()) 409 errx(1, "Must be superuser to use < 1 sec ping interval"); 410 if (preload > 0 && getuid()) 411 errx(1, "Must be superuser to use -l"); 412 #endif 413 sec_to_timeval(interval, &interval_tv); 414 415 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 416 warnx("Sorry, no audible output for flood pings"); 417 418 if (npackets != 0) { 419 npackets += preload; 420 } else { 421 npackets = INT_MAX; 422 } 423 424 if (hostind == 0) { 425 if (optind != argc-1) 426 usage(); 427 else 428 hostind = optind; 429 } 430 else if (hostind >= argc - 1) 431 usage(); 432 433 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 434 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 435 pingflags |= F_MCAST; 436 if (!(pingflags & F_SOURCE_ROUTE)) 437 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 438 439 loc_addr.sin_family = AF_INET; 440 loc_addr.sin_len = sizeof(struct sockaddr_in); 441 loc_addr.sin_addr.s_addr = htonl((127<<24)+1); 442 443 if (datalen >= PHDR_LEN) /* can we time them? */ 444 pingflags |= F_TIMING; 445 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 446 if ((packet = (u_char *)malloc(packlen)) == NULL) 447 err(1, "Out of memory"); 448 449 if (pingflags & F_PING_FILLED) { 450 fill(); 451 } else if (pingflags & F_PING_RANDOM) { 452 rnd_fill(); 453 } else { 454 for (i = PHDR_LEN; i < datalen; i++) 455 opack_icmp.icmp_data[i] = i; 456 } 457 458 ident = htons(getpid()) & 0xFFFF; 459 460 if ((s = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 461 err(1, "Cannot create socket"); 462 if (options & SO_DEBUG) { 463 if (setsockopt(s, SOL_SOCKET, SO_DEBUG, 464 (char *)&on, sizeof(on)) == -1) 465 warn("Can't turn on socket debugging"); 466 } 467 if (options & SO_DONTROUTE) { 468 if (setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 469 (char *)&on, sizeof(on)) == -1) 470 warn("SO_DONTROUTE"); 471 } 472 473 if ((sloop = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 474 err(1, "Cannot create socket"); 475 if (options & SO_DEBUG) { 476 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 477 (char *)&on, sizeof(on)) == -1) 478 warn("Can't turn on socket debugging"); 479 } 480 if (options & SO_DONTROUTE) { 481 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 482 (char *)&on, sizeof(on)) == -1) 483 warn("SO_DONTROUTE"); 484 } 485 486 if (pingflags & F_SOURCE_ROUTE) { 487 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 488 optspace[IPOPT_OLEN] = optlen = 7; 489 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 490 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 491 sizeof(whereto.sin_addr)); 492 optspace[optlen++] = IPOPT_NOP; 493 } 494 if (pingflags & F_RECORD_ROUTE) { 495 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 496 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 497 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 498 optlen = MAX_IPOPTLEN; 499 } 500 /* this leaves opack_ip 0(mod 4) aligned */ 501 opack_ip = (struct ip *)((char *)&out_pack.o_ip 502 + sizeof(out_pack.o_opt) 503 - optlen); 504 (void) memcpy(opack_ip + 1, optspace, optlen); 505 506 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 507 err(1, "Can't set special IP header"); 508 509 opack_ip->ip_v = IPVERSION; 510 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 511 opack_ip->ip_tos = tos; 512 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 513 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 514 opack_ip->ip_p = IPPROTO_ICMP; 515 opack_ip->ip_src = src_addr.sin_addr; 516 opack_ip->ip_dst = send_addr.sin_addr; 517 518 if (pingflags & F_MCAST) { 519 if (pingflags & F_MCAST_NOLOOP) { 520 u_char loop = 0; 521 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 522 (char *) &loop, 1) < 0) 523 err(1, "Can't disable multicast loopback"); 524 } 525 526 if (ttl != 0 527 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 528 (char *) &ttl, 1) < 0) 529 err(1, "Can't set multicast time-to-live"); 530 531 if ((pingflags & F_SOURCE_ADDR) 532 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 533 (char *) &src_addr.sin_addr, 534 sizeof(src_addr.sin_addr)) < 0) 535 err(1, "Can't set multicast source interface"); 536 537 } else if (pingflags & F_SOURCE_ADDR) { 538 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 539 (char *) &src_addr.sin_addr, 540 sizeof(src_addr.sin_addr)) < 0) 541 err(1, "Can't set source interface/address"); 542 } 543 #ifdef IPSEC 544 #ifdef IPSEC_POLICY_IPSEC 545 { 546 char *buf; 547 if (pingflags & F_POLICY) { 548 if (policy_in != NULL) { 549 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 550 if (buf == NULL) 551 errx(1, "%s", ipsec_strerror()); 552 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 553 buf, ipsec_get_policylen(buf)) < 0) { 554 err(1, "ipsec policy cannot be configured"); 555 } 556 free(buf); 557 } 558 if (policy_out != NULL) { 559 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 560 if (buf == NULL) 561 errx(1, "%s", ipsec_strerror()); 562 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 563 buf, ipsec_get_policylen(buf)) < 0) { 564 err(1, "ipsec policy cannot be configured"); 565 } 566 free(buf); 567 } 568 } 569 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 570 if (buf == NULL) 571 errx(1, "%s", ipsec_strerror()); 572 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 573 buf, ipsec_get_policylen(buf)) < 0) { 574 #if 0 575 warnx("ipsec is not configured"); 576 #else 577 /* ignore it, should be okay */ 578 #endif 579 } 580 free(buf); 581 } 582 #else 583 { 584 int optval; 585 if (pingflags & F_AUTHHDR) { 586 optval = IPSEC_LEVEL_REQUIRE; 587 #ifdef IP_AUTH_TRANS_LEVEL 588 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 589 (char *)&optval, sizeof(optval)); 590 #else 591 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 592 (char *)&optval, sizeof(optval)); 593 #endif 594 } 595 if (pingflags & F_ENCRYPT) { 596 optval = IPSEC_LEVEL_REQUIRE; 597 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 598 (char *)&optval, sizeof(optval)); 599 } 600 optval = IPSEC_LEVEL_BYPASS; 601 #ifdef IP_AUTH_TRANS_LEVEL 602 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 603 (char *)&optval, sizeof(optval)); 604 #else 605 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 606 (char *)&optval, sizeof(optval)); 607 #endif 608 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 609 (char *)&optval, sizeof(optval)); 610 } 611 #endif /*IPSEC_POLICY_IPSEC*/ 612 #endif /*IPSEC*/ 613 614 (void)printf("PING %s (%s): %d data bytes\n", hostname, 615 inet_ntoa(whereto.sin_addr), datalen); 616 617 /* When pinging the broadcast address, you can get a lot 618 * of answers. Doing something so evil is useful if you 619 * are trying to stress the ethernet, or just want to 620 * fill the arp cache to get some stuff for /etc/ethers. 621 */ 622 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 623 (char*)&bufspace, sizeof(bufspace))) { 624 if ((bufspace -= 4096) <= 0) 625 err(1, "Cannot set the receive buffer size"); 626 } 627 628 /* make it possible to send giant probes, but do not worry now 629 * if it fails, since we probably won't send giant probes. 630 */ 631 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 632 (char*)&bufspace, sizeof(bufspace)); 633 634 (void)signal(SIGINT, prefinish); 635 636 #if defined(SIGINFO) && defined(NOKERNINFO) 637 if (tcgetattr (0, &ts) != -1) { 638 reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 639 ts.c_lflag |= NOKERNINFO; 640 tcsetattr (STDIN_FILENO, TCSANOW, &ts); 641 } 642 #endif 643 644 #ifdef SIGINFO 645 (void)signal(SIGINFO, prtsig); 646 #else 647 (void)signal(SIGQUIT, prtsig); 648 #endif 649 (void)signal(SIGCONT, prtsig); 650 651 /* fire off them quickies */ 652 for (i = 0; i < preload; i++) { 653 (void)gettimeofday(&now, 0); 654 pinger(); 655 } 656 657 doit(); 658 return 0; 659 } 660 661 662 static void 663 doit(void) 664 { 665 int cc; 666 struct sockaddr_in from; 667 int fromlen; 668 double sec, last, d_last; 669 struct pollfd fdmaskp[1]; 670 671 (void)gettimeofday(&clear_cache,0); 672 if (maxwait != 0) { 673 last = timeval_to_sec(&clear_cache) + maxwait; 674 d_last = 0; 675 } else { 676 last = 0; 677 d_last = 365*24*60*60; 678 } 679 680 do { 681 (void)gettimeofday(&now,0); 682 683 if (last != 0) 684 d_last = last - timeval_to_sec(&now); 685 686 if (ntransmitted < npackets && d_last > 0) { 687 /* send if within 100 usec or late for next packet */ 688 sec = diffsec(&next_tx,&now); 689 if (sec <= 0.0001 690 || (lastrcvd && (pingflags & F_FLOOD))) { 691 pinger(); 692 sec = diffsec(&next_tx,&now); 693 } 694 if (sec < 0.0) 695 sec = 0.0; 696 if (d_last < sec) 697 sec = d_last; 698 699 } else { 700 /* For the last response, wait twice as long as the 701 * worst case seen, or 10 times as long as the 702 * maximum interpacket interval, whichever is longer. 703 */ 704 sec = MAX(2*tmax,10*interval) - diffsec(&now,&last_tx); 705 if (d_last < sec) 706 sec = d_last; 707 if (sec <= 0) 708 break; 709 } 710 711 712 fdmaskp[0].fd = s; 713 fdmaskp[0].events = POLLIN; 714 cc = poll(fdmaskp, 1, (int)(sec * 1000)); 715 if (cc <= 0) { 716 if (cc < 0) { 717 if (errno == EINTR) 718 continue; 719 jiggle_flush(1); 720 err(1, "poll"); 721 } 722 continue; 723 } 724 725 fromlen = sizeof(from); 726 cc = recvfrom(s, (char *) packet, packlen, 727 0, (struct sockaddr *)&from, 728 &fromlen); 729 if (cc < 0) { 730 if (errno != EINTR) { 731 jiggle_flush(1); 732 warn("recvfrom"); 733 (void)fflush(stderr); 734 } 735 continue; 736 } 737 (void)gettimeofday(&now, 0); 738 pr_pack(packet, cc, &from); 739 740 } while (nreceived < npackets 741 && (nreceived == 0 || !(pingflags & F_ONCE))); 742 743 finish(0); 744 } 745 746 747 static void 748 jiggle_flush(int nl) /* new line if there are dots */ 749 { 750 int serrno = errno; 751 752 if (jiggle_cnt > 0) { 753 total_jiggled += jiggle_cnt; 754 jiggle_direction = 1; 755 do { 756 (void)putchar('.'); 757 } while (--jiggle_cnt > 0); 758 759 } else if (jiggle_cnt < 0) { 760 total_jiggled -= jiggle_cnt; 761 jiggle_direction = -1; 762 do { 763 (void)putchar('\b'); 764 } while (++jiggle_cnt < 0); 765 } 766 767 if (nl) { 768 if (total_jiggled != 0) 769 (void)putchar('\n'); 770 total_jiggled = 0; 771 jiggle_direction = -1; 772 } 773 774 (void)fflush(stdout); 775 (void)fflush(stderr); 776 jiggle_time = now; 777 errno = serrno; 778 } 779 780 781 /* jiggle the cursor for flood-ping 782 */ 783 static void 784 jiggle(int delta) 785 { 786 double dt; 787 788 if (pingflags & F_QUIET) 789 return; 790 791 /* do not back up into messages */ 792 if (total_jiggled+jiggle_cnt+delta < 0) 793 return; 794 795 jiggle_cnt += delta; 796 797 /* flush the FLOOD dots when things are quiet 798 * or occassionally to make the cursor jiggle. 799 */ 800 dt = diffsec(&last_tx, &jiggle_time); 801 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 802 jiggle_flush(0); 803 } 804 805 806 /* 807 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 808 * will be added on by the kernel. The ID field is our UNIX process ID, 809 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 810 * of the data portion are used to hold a UNIX "timeval" struct in VAX 811 * byte-order, to compute the round-trip time. 812 */ 813 static void 814 pinger(void) 815 { 816 int i, cc, sw; 817 818 opack_icmp.icmp_code = 0; 819 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 820 821 /* clear the cached route in the kernel after an ICMP 822 * response such as a Redirect is seen to stop causing 823 * more such packets. Also clear the cached route 824 * periodically in case of routing changes that make 825 * black holes come and go. 826 */ 827 if (clear_cache.tv_sec != now.tv_sec) { 828 opack_icmp.icmp_type = ICMP_ECHOREPLY; 829 opack_icmp.icmp_id = ~ident; 830 opack_icmp.icmp_cksum = 0; 831 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 832 PHDR_LEN); 833 sw = 0; 834 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 835 (char *)&sw,sizeof(sw)) < 0) 836 err(1, "Can't turn off special IP header"); 837 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 838 (struct sockaddr *)&loc_addr, 839 sizeof(struct sockaddr_in)) < 0) { 840 /* 841 * XXX: we only report this as a warning in verbose 842 * mode because people get confused when they see 843 * this error when they are running in single user 844 * mode and they have not configured lo0 845 */ 846 if (pingflags & F_VERBOSE) 847 warn("failed to clear cached route"); 848 } 849 sw = 1; 850 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 851 (char *)&sw, sizeof(sw)) < 0) 852 err(1, "Can't set special IP header"); 853 854 (void)gettimeofday(&clear_cache,0); 855 } 856 857 opack_icmp.icmp_type = ICMP_ECHO; 858 opack_icmp.icmp_id = ident; 859 if (pingflags & F_TIMING) 860 (void) memcpy(&opack_icmp.icmp_data[0], &now, sizeof(now)); 861 cc = datalen+PHDR_LEN; 862 opack_icmp.icmp_cksum = 0; 863 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 864 865 cc += opack_ip->ip_hl<<2; 866 opack_ip->ip_len = cc; 867 i = sendto(s, (char *) opack_ip, cc, 0, 868 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 869 if (i != cc) { 870 jiggle_flush(1); 871 if (i < 0) 872 warn("sendto"); 873 else 874 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 875 (void)fflush(stderr); 876 } 877 lastrcvd = 0; 878 879 CLR(ntransmitted); 880 ntransmitted++; 881 882 last_tx = now; 883 if (next_tx.tv_sec == 0) { 884 first_tx = now; 885 next_tx = now; 886 } 887 888 /* Transmit regularly, at always the same microsecond in the 889 * second when going at one packet per second. 890 * If we are at most 100 ms behind, send extras to get caught up. 891 * Otherwise, skip packets we were too slow to send. 892 */ 893 if (diffsec(&next_tx, &now) <= interval) { 894 do { 895 timevaladd(&next_tx, &interval_tv); 896 } while (diffsec(&next_tx, &now) < -0.1); 897 } 898 899 if (pingflags & F_FLOOD) 900 jiggle(1); 901 902 /* While the packet is going out, ready buffer for the next 903 * packet. Use a fast but not very good random number generator. 904 */ 905 if (pingflags & F_PING_RANDOM) 906 rnd_fill(); 907 } 908 909 910 static void 911 pr_pack_sub(int cc, 912 char *addr, 913 int seqno, 914 int dupflag, 915 int ttl, 916 double triptime) 917 { 918 jiggle_flush(1); 919 920 if (pingflags & F_FLOOD) 921 return; 922 923 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 924 if (dupflag) 925 (void)printf(" DUP!"); 926 (void)printf(" ttl=%d", ttl); 927 if (pingflags & F_TIMING) 928 (void)printf(" time=%.3f ms", triptime*1000.0); 929 930 /* 931 * Send beep to stderr, since that's more likely than stdout 932 * to go to a terminal.. 933 */ 934 if (pingflags & F_AUDIBLE && !dupflag) 935 (void)fprintf(stderr,"\a"); 936 } 937 938 939 /* 940 * Print out the packet, if it came from us. This logic is necessary 941 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 942 * which arrive ('tis only fair). This permits multiple copies of this 943 * program to be run without having intermingled output (or statistics!). 944 */ 945 static void 946 pr_pack(u_char *buf, 947 int tot_len, 948 struct sockaddr_in *from) 949 { 950 struct ip *ip; 951 struct icmp *icp; 952 int i, j, net_len; 953 u_char *cp; 954 static int old_rrlen; 955 static char old_rr[MAX_IPOPTLEN]; 956 int hlen, dupflag = 0, dumped; 957 double triptime = 0.0; 958 #define PR_PACK_SUB() {if (!dumped) { \ 959 dumped = 1; \ 960 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 961 ntohs((u_int16_t)icp->icmp_seq), \ 962 dupflag, ip->ip_ttl, triptime);}} 963 964 /* Check the IP header */ 965 ip = (struct ip *) buf; 966 hlen = ip->ip_hl << 2; 967 if (tot_len < hlen + ICMP_MINLEN) { 968 if (pingflags & F_VERBOSE) { 969 jiggle_flush(1); 970 (void)printf("packet too short (%d bytes) from %s\n", 971 tot_len, inet_ntoa(from->sin_addr)); 972 } 973 return; 974 } 975 976 /* Now the ICMP part */ 977 dumped = 0; 978 net_len = tot_len - hlen; 979 icp = (struct icmp *)(buf + hlen); 980 if (icp->icmp_type == ICMP_ECHOREPLY 981 && icp->icmp_id == ident) { 982 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 983 lastrcvd = 1; 984 last_rx = now; 985 if (first_rx.tv_sec == 0) 986 first_rx = last_rx; 987 nreceived++; 988 if (pingflags & F_TIMING) { 989 struct timeval tv; 990 (void) memcpy(&tv, icp->icmp_data, sizeof(tv)); 991 triptime = diffsec(&last_rx, &tv); 992 tsum += triptime; 993 tsumsq += triptime * triptime; 994 if (triptime < tmin) 995 tmin = triptime; 996 if (triptime > tmax) 997 tmax = triptime; 998 } 999 1000 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1001 nrepeats++, nreceived--; 1002 dupflag=1; 1003 } else { 1004 SET(ntohs((u_int16_t)icp->icmp_seq)); 1005 } 1006 1007 if (tot_len != opack_ip->ip_len) { 1008 PR_PACK_SUB(); 1009 (void)printf("\nwrong total length %d instead of %d", 1010 tot_len, opack_ip->ip_len); 1011 } 1012 1013 if (!dupflag) { 1014 static u_int16_t last_seqno = 0xffff; 1015 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1016 u_int16_t gap = seqno - (last_seqno + 1); 1017 if (gap > 0 && gap < 0x8000 && 1018 (pingflags & F_VERBOSE)) { 1019 (void)printf("[*** sequence gap of %u " 1020 "packets from %u ... %u ***]\n", gap, 1021 (u_int16_t) (last_seqno + 1), 1022 (u_int16_t) (seqno - 1)); 1023 if (pingflags & F_QUIET) 1024 summary(0); 1025 } 1026 1027 if (gap < 0x8000) 1028 last_seqno = seqno; 1029 } 1030 1031 if (pingflags & F_QUIET) 1032 return; 1033 1034 if (!(pingflags & F_FLOOD)) 1035 PR_PACK_SUB(); 1036 1037 /* check the data */ 1038 if (datalen > PHDR_LEN 1039 && !(pingflags & F_PING_RANDOM) 1040 && memcmp(&icp->icmp_data[PHDR_LEN], 1041 &opack_icmp.icmp_data[PHDR_LEN], 1042 datalen-PHDR_LEN)) { 1043 for (i=PHDR_LEN; i<datalen; i++) { 1044 if (icp->icmp_data[i] != 1045 opack_icmp.icmp_data[i]) 1046 break; 1047 } 1048 PR_PACK_SUB(); 1049 (void)printf("\nwrong data byte #%d should have been" 1050 " %#x but was %#x", i, 1051 (u_char)opack_icmp.icmp_data[i], 1052 (u_char)icp->icmp_data[i]); 1053 for (i=PHDR_LEN; i<datalen; i++) { 1054 if ((i%16) == PHDR_LEN) 1055 (void)printf("\n\t"); 1056 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1057 } 1058 } 1059 1060 } else { 1061 if (!pr_icmph(icp, from, net_len)) 1062 return; 1063 dumped = 2; 1064 } 1065 1066 /* Display any IP options */ 1067 cp = buf + sizeof(struct ip); 1068 while (hlen > (int)sizeof(struct ip)) { 1069 switch (*cp) { 1070 case IPOPT_EOL: 1071 hlen = 0; 1072 break; 1073 case IPOPT_LSRR: 1074 hlen -= 2; 1075 j = *++cp; 1076 ++cp; 1077 j -= IPOPT_MINOFF; 1078 if (j <= 0) 1079 continue; 1080 if (dumped <= 1) { 1081 j = ((j+3)/4)*4; 1082 hlen -= j; 1083 cp += j; 1084 break; 1085 } 1086 PR_PACK_SUB(); 1087 (void)printf("\nLSRR: "); 1088 for (;;) { 1089 pr_saddr(cp); 1090 cp += 4; 1091 hlen -= 4; 1092 j -= 4; 1093 if (j <= 0) 1094 break; 1095 (void)putchar('\n'); 1096 } 1097 break; 1098 case IPOPT_RR: 1099 j = *++cp; /* get length */ 1100 i = *++cp; /* and pointer */ 1101 hlen -= 2; 1102 if (i > j) 1103 i = j; 1104 i -= IPOPT_MINOFF; 1105 if (i <= 0) 1106 continue; 1107 if (dumped <= 1) { 1108 if (i == old_rrlen 1109 && !memcmp(cp, old_rr, i)) { 1110 if (dumped) 1111 (void)printf("\t(same route)"); 1112 j = ((i+3)/4)*4; 1113 hlen -= j; 1114 cp += j; 1115 break; 1116 } 1117 old_rrlen = i; 1118 (void) memcpy(old_rr, cp, i); 1119 } 1120 if (!dumped) { 1121 jiggle_flush(1); 1122 (void)printf("RR: "); 1123 dumped = 1; 1124 } else { 1125 (void)printf("\nRR: "); 1126 } 1127 for (;;) { 1128 pr_saddr(cp); 1129 cp += 4; 1130 hlen -= 4; 1131 i -= 4; 1132 if (i <= 0) 1133 break; 1134 (void)putchar('\n'); 1135 } 1136 break; 1137 case IPOPT_NOP: 1138 if (dumped <= 1) 1139 break; 1140 PR_PACK_SUB(); 1141 (void)printf("\nNOP"); 1142 break; 1143 #ifdef sgi 1144 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1145 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1146 case IPOPT_CIPSO: /* Commercial IPSO */ 1147 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1148 i = (unsigned)cp[1]; 1149 hlen -= i - 1; 1150 PR_PACK_SUB(); 1151 (void)printf("\nSEC:"); 1152 while (i--) { 1153 (void)printf(" %02x", *cp++); 1154 } 1155 cp--; 1156 break; 1157 } 1158 #endif 1159 default: 1160 PR_PACK_SUB(); 1161 (void)printf("\nunknown option 0x%x", *cp); 1162 break; 1163 } 1164 hlen--; 1165 cp++; 1166 } 1167 1168 if (dumped) { 1169 (void)putchar('\n'); 1170 (void)fflush(stdout); 1171 } else { 1172 jiggle(-1); 1173 } 1174 } 1175 1176 1177 /* Compute the IP checksum 1178 * This assumes the packet is less than 32K long. 1179 */ 1180 static u_int16_t 1181 in_cksum(u_int16_t *p, u_int len) 1182 { 1183 u_int32_t sum = 0; 1184 int nwords = len >> 1; 1185 1186 while (nwords-- != 0) 1187 sum += *p++; 1188 1189 if (len & 1) { 1190 union { 1191 u_int16_t w; 1192 u_int8_t c[2]; 1193 } u; 1194 u.c[0] = *(u_char *)p; 1195 u.c[1] = 0; 1196 sum += u.w; 1197 } 1198 1199 /* end-around-carry */ 1200 sum = (sum >> 16) + (sum & 0xffff); 1201 sum += (sum >> 16); 1202 return (~sum); 1203 } 1204 1205 1206 /* 1207 * compute the difference of two timevals in seconds 1208 */ 1209 static double 1210 diffsec(struct timeval *timenow, 1211 struct timeval *then) 1212 { 1213 return ((timenow->tv_sec - then->tv_sec)*1.0 1214 + (timenow->tv_usec - then->tv_usec)/1000000.0); 1215 } 1216 1217 1218 static void 1219 timevaladd(struct timeval *t1, 1220 struct timeval *t2) 1221 { 1222 1223 t1->tv_sec += t2->tv_sec; 1224 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1225 t1->tv_sec++; 1226 t1->tv_usec -= 1000000; 1227 } 1228 } 1229 1230 1231 static void 1232 sec_to_timeval(const double sec, struct timeval *tp) 1233 { 1234 tp->tv_sec = sec; 1235 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1236 } 1237 1238 1239 static double 1240 timeval_to_sec(const struct timeval *tp) 1241 { 1242 return tp->tv_sec + tp->tv_usec / 1000000.0; 1243 } 1244 1245 1246 /* 1247 * Print statistics. 1248 * Heavily buffered STDIO is used here, so that all the statistics 1249 * will be written with 1 sys-write call. This is nice when more 1250 * than one copy of the program is running on a terminal; it prevents 1251 * the statistics output from becomming intermingled. 1252 */ 1253 static void 1254 summary(int header) 1255 { 1256 jiggle_flush(1); 1257 1258 if (header) 1259 (void)printf("\n----%s PING Statistics----\n", hostname); 1260 (void)printf("%d packets transmitted, ", ntransmitted); 1261 (void)printf("%d packets received, ", nreceived); 1262 if (nrepeats) 1263 (void)printf("+%d duplicates, ", nrepeats); 1264 if (ntransmitted) { 1265 if (nreceived > ntransmitted) 1266 (void)printf("-- somebody's duplicating packets!"); 1267 else 1268 (void)printf("%.1f%% packet loss", 1269 (((ntransmitted-nreceived)*100.0) / 1270 ntransmitted)); 1271 } 1272 (void)printf("\n"); 1273 if (nreceived && (pingflags & F_TIMING)) { 1274 double n = nreceived + nrepeats; 1275 double avg = (tsum / n); 1276 double variance = 0.0; 1277 if (n>1) 1278 variance = (tsumsq - n*avg*avg) /(n-1); 1279 1280 printf("round-trip min/avg/max/stddev = " 1281 "%.3f/%.3f/%.3f/%.3f ms\n", 1282 tmin * 1000.0, avg * 1000.0, 1283 tmax * 1000.0, sqrt(variance) * 1000.0); 1284 if (pingflags & F_FLOOD) { 1285 double r = diffsec(&last_rx, &first_rx); 1286 double t = diffsec(&last_tx, &first_tx); 1287 if (r == 0) 1288 r = 0.0001; 1289 if (t == 0) 1290 t = 0.0001; 1291 (void)printf(" %.1f packets/sec sent, " 1292 " %.1f packets/sec received\n", 1293 ntransmitted/t, nreceived/r); 1294 } 1295 } 1296 } 1297 1298 1299 /* 1300 * Print statistics when SIGINFO is received. 1301 */ 1302 /* ARGSUSED */ 1303 static void 1304 prtsig(int dummy) 1305 { 1306 summary(0); 1307 #ifdef SIGINFO 1308 (void)signal(SIGINFO, prtsig); 1309 #else 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 /* 1333 * Print statistics and give up. 1334 */ 1335 /* ARGSUSED */ 1336 static void 1337 finish(int dummy) 1338 { 1339 #if defined(SIGINFO) && defined(NOKERNINFO) 1340 struct termios ts; 1341 1342 if (reset_kerninfo && tcgetattr (0, &ts) != -1) { 1343 ts.c_lflag &= ~NOKERNINFO; 1344 tcsetattr (STDIN_FILENO, TCSANOW, &ts); 1345 } 1346 (void)signal(SIGINFO, SIG_IGN); 1347 #else 1348 (void)signal(SIGQUIT, SIG_DFL); 1349 #endif 1350 1351 summary(1); 1352 exit(nreceived > 0 ? 0 : 2); 1353 } 1354 1355 1356 static int /* 0=do not print it */ 1357 ck_pr_icmph(struct icmp *icp, 1358 struct sockaddr_in *from, 1359 int cc, 1360 int override) /* 1=override VERBOSE if interesting */ 1361 { 1362 int hlen; 1363 struct ip ipb, *ip = &ipb; 1364 struct icmp icp2b, *icp2 = &icp2b; 1365 int res; 1366 1367 if (pingflags & F_VERBOSE) { 1368 res = 1; 1369 jiggle_flush(1); 1370 } else { 1371 res = 0; 1372 } 1373 1374 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1375 hlen = ip->ip_hl << 2; 1376 if (ip->ip_p == IPPROTO_ICMP 1377 && hlen + 6 <= cc) { 1378 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1379 if (icp2->icmp_id == ident) { 1380 /* remember to clear route cached in kernel 1381 * if this non-Echo-Reply ICMP message was for one 1382 * of our packets. 1383 */ 1384 clear_cache.tv_sec = 0; 1385 1386 if (!res && override 1387 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1388 jiggle_flush(1); 1389 (void)printf("%d bytes from %s: ", 1390 cc, pr_addr(&from->sin_addr)); 1391 res = 1; 1392 } 1393 } 1394 } 1395 1396 return res; 1397 } 1398 1399 1400 /* 1401 * Print a descriptive string about an ICMP header other than an echo reply. 1402 */ 1403 static int /* 0=printed nothing */ 1404 pr_icmph(struct icmp *icp, 1405 struct sockaddr_in *from, 1406 int cc) 1407 { 1408 switch (icp->icmp_type ) { 1409 case ICMP_UNREACH: 1410 if (!ck_pr_icmph(icp, from, cc, 1)) 1411 return 0; 1412 switch (icp->icmp_code) { 1413 case ICMP_UNREACH_NET: 1414 (void)printf("Destination Net Unreachable"); 1415 break; 1416 case ICMP_UNREACH_HOST: 1417 (void)printf("Destination Host Unreachable"); 1418 break; 1419 case ICMP_UNREACH_PROTOCOL: 1420 (void)printf("Destination Protocol Unreachable"); 1421 break; 1422 case ICMP_UNREACH_PORT: 1423 (void)printf("Destination Port Unreachable"); 1424 break; 1425 case ICMP_UNREACH_NEEDFRAG: 1426 (void)printf("frag needed and DF set. Next MTU=%d", 1427 ntohs(icp->icmp_nextmtu)); 1428 break; 1429 case ICMP_UNREACH_SRCFAIL: 1430 (void)printf("Source Route Failed"); 1431 break; 1432 case ICMP_UNREACH_NET_UNKNOWN: 1433 (void)printf("Unreachable unknown net"); 1434 break; 1435 case ICMP_UNREACH_HOST_UNKNOWN: 1436 (void)printf("Unreachable unknown host"); 1437 break; 1438 case ICMP_UNREACH_ISOLATED: 1439 (void)printf("Unreachable host isolated"); 1440 break; 1441 case ICMP_UNREACH_NET_PROHIB: 1442 (void)printf("Net prohibited access"); 1443 break; 1444 case ICMP_UNREACH_HOST_PROHIB: 1445 (void)printf("Host prohibited access"); 1446 break; 1447 case ICMP_UNREACH_TOSNET: 1448 (void)printf("Bad TOS for net"); 1449 break; 1450 case ICMP_UNREACH_TOSHOST: 1451 (void)printf("Bad TOS for host"); 1452 break; 1453 case 13: 1454 (void)printf("Communication prohibited"); 1455 break; 1456 case 14: 1457 (void)printf("Host precedence violation"); 1458 break; 1459 case 15: 1460 (void)printf("Precedence cutoff"); 1461 break; 1462 default: 1463 (void)printf("Bad Destination Unreachable Code: %d", 1464 icp->icmp_code); 1465 break; 1466 } 1467 /* Print returned IP header information */ 1468 pr_retip(icp, cc); 1469 break; 1470 1471 case ICMP_SOURCEQUENCH: 1472 if (!ck_pr_icmph(icp, from, cc, 1)) 1473 return 0; 1474 (void)printf("Source Quench"); 1475 pr_retip(icp, cc); 1476 break; 1477 1478 case ICMP_REDIRECT: 1479 if (!ck_pr_icmph(icp, from, cc, 1)) 1480 return 0; 1481 switch (icp->icmp_code) { 1482 case ICMP_REDIRECT_NET: 1483 (void)printf("Redirect Network"); 1484 break; 1485 case ICMP_REDIRECT_HOST: 1486 (void)printf("Redirect Host"); 1487 break; 1488 case ICMP_REDIRECT_TOSNET: 1489 (void)printf("Redirect Type of Service and Network"); 1490 break; 1491 case ICMP_REDIRECT_TOSHOST: 1492 (void)printf("Redirect Type of Service and Host"); 1493 break; 1494 default: 1495 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1496 break; 1497 } 1498 (void)printf(" New router addr: %s", 1499 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1500 pr_retip(icp, cc); 1501 break; 1502 1503 case ICMP_ECHO: 1504 if (!ck_pr_icmph(icp, from, cc, 0)) 1505 return 0; 1506 (void)printf("Echo Request: ID=%d seq=%d", 1507 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1508 break; 1509 1510 case ICMP_ECHOREPLY: 1511 /* displaying other's pings is too noisey */ 1512 #if 0 1513 if (!ck_pr_icmph(icp, from, cc, 0)) 1514 return 0; 1515 (void)printf("Echo Reply: ID=%d seq=%d", 1516 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1517 break; 1518 #else 1519 return 0; 1520 #endif 1521 1522 case ICMP_ROUTERADVERT: 1523 if (!ck_pr_icmph(icp, from, cc, 0)) 1524 return 0; 1525 (void)printf("Router Discovery Advert"); 1526 break; 1527 1528 case ICMP_ROUTERSOLICIT: 1529 if (!ck_pr_icmph(icp, from, cc, 0)) 1530 return 0; 1531 (void)printf("Router Discovery Solicit"); 1532 break; 1533 1534 case ICMP_TIMXCEED: 1535 if (!ck_pr_icmph(icp, from, cc, 1)) 1536 return 0; 1537 switch (icp->icmp_code ) { 1538 case ICMP_TIMXCEED_INTRANS: 1539 (void)printf("Time To Live exceeded"); 1540 break; 1541 case ICMP_TIMXCEED_REASS: 1542 (void)printf("Frag reassembly time exceeded"); 1543 break; 1544 default: 1545 (void)printf("Time exceeded, Bad Code: %d", 1546 icp->icmp_code); 1547 break; 1548 } 1549 pr_retip(icp, cc); 1550 break; 1551 1552 case ICMP_PARAMPROB: 1553 if (!ck_pr_icmph(icp, from, cc, 1)) 1554 return 0; 1555 (void)printf("Parameter problem: pointer = 0x%02x", 1556 icp->icmp_hun.ih_pptr); 1557 pr_retip(icp, cc); 1558 break; 1559 1560 case ICMP_TSTAMP: 1561 if (!ck_pr_icmph(icp, from, cc, 0)) 1562 return 0; 1563 (void)printf("Timestamp"); 1564 break; 1565 1566 case ICMP_TSTAMPREPLY: 1567 if (!ck_pr_icmph(icp, from, cc, 0)) 1568 return 0; 1569 (void)printf("Timestamp Reply"); 1570 break; 1571 1572 case ICMP_IREQ: 1573 if (!ck_pr_icmph(icp, from, cc, 0)) 1574 return 0; 1575 (void)printf("Information Request"); 1576 break; 1577 1578 case ICMP_IREQREPLY: 1579 if (!ck_pr_icmph(icp, from, cc, 0)) 1580 return 0; 1581 (void)printf("Information Reply"); 1582 break; 1583 1584 case ICMP_MASKREQ: 1585 if (!ck_pr_icmph(icp, from, cc, 0)) 1586 return 0; 1587 (void)printf("Address Mask Request"); 1588 break; 1589 1590 case ICMP_MASKREPLY: 1591 if (!ck_pr_icmph(icp, from, cc, 0)) 1592 return 0; 1593 (void)printf("Address Mask Reply"); 1594 break; 1595 1596 default: 1597 if (!ck_pr_icmph(icp, from, cc, 0)) 1598 return 0; 1599 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1600 if (pingflags & F_VERBOSE) 1601 pr_iph(icp, cc); 1602 } 1603 1604 return 1; 1605 } 1606 1607 1608 /* 1609 * Print an IP header with options. 1610 */ 1611 static void 1612 pr_iph(struct icmp *icp, 1613 int cc) 1614 { 1615 int hlen; 1616 u_char *cp; 1617 struct ip ipb, *ip = &ipb; 1618 1619 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1620 1621 hlen = ip->ip_hl << 2; 1622 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1623 1624 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1625 (void)printf(" %1x %1x %02x %04x %04x", 1626 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1627 (void)printf(" %1x %04x", 1628 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1629 (void)printf(" %02x %02x %04x", 1630 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1631 (void)printf(" %15s ", 1632 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1633 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1634 /* dump any option bytes */ 1635 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1636 (void)printf("%02x", *cp++); 1637 } 1638 } 1639 1640 /* 1641 * Print an ASCII host address starting from a string of bytes. 1642 */ 1643 static void 1644 pr_saddr(u_char *cp) 1645 { 1646 n_long l; 1647 struct in_addr addr; 1648 1649 l = (u_char)*++cp; 1650 l = (l<<8) + (u_char)*++cp; 1651 l = (l<<8) + (u_char)*++cp; 1652 l = (l<<8) + (u_char)*++cp; 1653 addr.s_addr = htonl(l); 1654 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1655 } 1656 1657 1658 /* 1659 * Return an ASCII host address 1660 * as a dotted quad and optionally with a hostname 1661 */ 1662 static char * 1663 pr_addr(struct in_addr *addr) /* in network order */ 1664 { 1665 struct hostent *hp; 1666 static char buf[MAXHOSTNAMELEN+4+16+1]; 1667 1668 if ((pingflags & F_NUMERIC) 1669 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1670 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1671 } else { 1672 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1673 inet_ntoa(*addr)); 1674 } 1675 1676 return buf; 1677 } 1678 1679 /* 1680 * Dump some info on a returned (via ICMP) IP packet. 1681 */ 1682 static void 1683 pr_retip(struct icmp *icp, 1684 int cc) 1685 { 1686 int hlen; 1687 u_char *cp; 1688 struct ip ipb, *ip = &ipb; 1689 1690 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1691 1692 if (pingflags & F_VERBOSE) 1693 pr_iph(icp, cc); 1694 1695 hlen = ip->ip_hl << 2; 1696 cp = (u_char *) &icp->icmp_data[hlen]; 1697 1698 if (ip->ip_p == IPPROTO_TCP) { 1699 if (pingflags & F_VERBOSE) 1700 (void)printf("\n TCP: from port %u, to port %u", 1701 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1702 } else if (ip->ip_p == IPPROTO_UDP) { 1703 if (pingflags & F_VERBOSE) 1704 (void)printf("\n UDP: from port %u, to port %u", 1705 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1706 } else if (ip->ip_p == IPPROTO_ICMP) { 1707 struct icmp icp2; 1708 (void) memcpy(&icp2, cp, sizeof(icp2)); 1709 if (icp2.icmp_type == ICMP_ECHO) { 1710 if (pingflags & F_VERBOSE) 1711 (void)printf("\n ID=%u icmp_seq=%u", 1712 ntohs((u_int16_t)icp2.icmp_id), 1713 ntohs((u_int16_t)icp2.icmp_seq)); 1714 else 1715 (void)printf(" for icmp_seq=%u", 1716 ntohs((u_int16_t)icp2.icmp_seq)); 1717 } 1718 } 1719 } 1720 1721 static void 1722 fill(void) 1723 { 1724 int i, j, k; 1725 char *cp; 1726 int pat[16]; 1727 1728 for (cp = fill_pat; *cp != '\0'; cp++) { 1729 if (!isxdigit((unsigned char)*cp)) 1730 break; 1731 } 1732 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1733 (void)fflush(stdout); 1734 errx(1, "\"-p %s\": patterns must be specified with" 1735 " 1-32 hex digits\n", 1736 fill_pat); 1737 } 1738 1739 i = sscanf(fill_pat, 1740 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1741 &pat[0], &pat[1], &pat[2], &pat[3], 1742 &pat[4], &pat[5], &pat[6], &pat[7], 1743 &pat[8], &pat[9], &pat[10], &pat[11], 1744 &pat[12], &pat[13], &pat[14], &pat[15]); 1745 1746 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1747 opack_icmp.icmp_data[k] = pat[j]; 1748 if (++j >= i) 1749 j = 0; 1750 } 1751 1752 if (!(pingflags & F_QUIET)) { 1753 (void)printf("PATTERN: 0x"); 1754 for (j=0; j<i; j++) 1755 (void)printf("%02x", 1756 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1757 (void)printf("\n"); 1758 } 1759 1760 } 1761 1762 1763 static void 1764 rnd_fill(void) 1765 { 1766 static u_int32_t rnd; 1767 int i; 1768 1769 for (i = PHDR_LEN; i < datalen; i++) { 1770 rnd = (3141592621U * rnd + 663896637U); 1771 opack_icmp.icmp_data[i] = rnd>>24; 1772 } 1773 } 1774 1775 1776 static void 1777 gethost(const char *arg, 1778 const char *name, 1779 struct sockaddr_in *sa, 1780 char *realname, 1781 int realname_len) 1782 { 1783 struct hostent *hp; 1784 1785 (void)memset(sa, 0, sizeof(*sa)); 1786 sa->sin_family = AF_INET; 1787 sa->sin_len = sizeof(struct sockaddr_in); 1788 1789 /* If it is an IP address, try to convert it to a name to 1790 * have something nice to display. 1791 */ 1792 if (inet_aton(name, &sa->sin_addr) != 0) { 1793 if (realname) { 1794 if (pingflags & F_NUMERIC) 1795 hp = 0; 1796 else 1797 hp = gethostbyaddr((char *)&sa->sin_addr, 1798 sizeof(sa->sin_addr), 1799 AF_INET); 1800 (void)strlcpy(realname, hp ? hp->h_name : name, 1801 realname_len); 1802 } 1803 return; 1804 } 1805 1806 hp = gethostbyname(name); 1807 if (!hp) 1808 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1809 1810 if (hp->h_addrtype != AF_INET) 1811 errx(1, "%s only supported with IP", arg); 1812 1813 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1814 1815 if (realname) 1816 (void)strlcpy(realname, hp->h_name, realname_len); 1817 } 1818 1819 1820 static void 1821 usage(void) 1822 { 1823 #ifdef IPSEC 1824 #ifdef IPSEC_POLICY_IPSEC 1825 #define IPSECOPT "\n [-E policy] " 1826 #else 1827 #define IPSECOPT "\n [-AE] " 1828 #endif /*IPSEC_POLICY_IPSEC*/ 1829 #else 1830 #define IPSECOPT "" 1831 #endif /*IPSEC*/ 1832 1833 (void)fprintf(stderr, "Usage: \n" 1834 "%s [-adDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1835 " [-i interval] [-I addr]\n" 1836 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1837 " [-w maxwait] " IPSECOPT "host\n", 1838 getprogname()); 1839 exit(1); 1840 } 1841
Indexes created Tue Sep 30 20:09:53 GMT 2025