ping.c revision 1.75.4.2
1 /* $NetBSD: ping.c,v 1.75.4.2 2007/08/11 14:10:48 bouyer 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 1.75.4.2 2007/08/11 14:10:48 bouyer 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 struct tv32 { 151 int32_t tv32_sec; 152 int32_t tv32_usec; 153 }; 154 155 156 u_char *packet; 157 int packlen; 158 int pingflags = 0, options; 159 char *fill_pat; 160 161 int s; /* Socket file descriptor */ 162 int sloop; /* Socket file descriptor/loopback */ 163 164 #define PHDR_LEN sizeof(struct tv32) /* size of timestamp header */ 165 struct sockaddr_in whereto, send_addr; /* Who to ping */ 166 struct sockaddr_in src_addr; /* from where */ 167 struct sockaddr_in loc_addr; /* 127.1 */ 168 int datalen = 64 - PHDR_LEN; /* How much data */ 169 170 #ifndef __NetBSD__ 171 static char *progname; 172 #define getprogname() (progname) 173 #define setprogname(name) ((void)(progname = (name))) 174 #endif 175 176 char hostname[MAXHOSTNAMELEN]; 177 178 static struct { 179 struct ip o_ip; 180 char o_opt[MAX_IPOPTLEN]; 181 union { 182 u_char u_buf[MAXPACKET+offsetof(struct icmp, icmp_data)]; 183 struct icmp u_icmp; 184 } o_u; 185 } out_pack; 186 #define opack_icmp out_pack.o_u.u_icmp 187 struct ip *opack_ip; 188 189 char optspace[MAX_IPOPTLEN]; /* record route space */ 190 int optlen; 191 192 193 int npackets; /* total packets to send */ 194 int preload; /* number of packets to "preload" */ 195 int ntransmitted; /* output sequence # = #sent */ 196 int ident; /* our ID, in network byte order */ 197 198 int nreceived; /* # of packets we got back */ 199 200 double interval; /* interval between packets */ 201 struct timeval interval_tv; 202 double tmin = 999999999.0; 203 double tmax = 0.0; 204 double tsum = 0.0; /* sum of all times */ 205 double tsumsq = 0.0; 206 double maxwait = 0.0; 207 208 #ifdef SIGINFO 209 int reset_kerninfo; 210 #endif 211 212 int bufspace = IP_MAXPACKET; 213 214 struct timeval now, clear_cache, last_tx, next_tx, first_tx; 215 struct timeval last_rx, first_rx; 216 int lastrcvd = 1; /* last ping sent has been received */ 217 218 static struct timeval jiggle_time; 219 static int jiggle_cnt, total_jiggled, jiggle_direction = -1; 220 221 static void doit(void); 222 static void prefinish(int); 223 static void prtsig(int); 224 static void finish(int); 225 static void summary(int); 226 static void pinger(void); 227 static void fill(void); 228 static void rnd_fill(void); 229 static double diffsec(struct timeval *, struct timeval *); 230 static void timevaladd(struct timeval *, struct timeval *); 231 static void sec_to_timeval(const double, struct timeval *); 232 static double timeval_to_sec(const struct timeval *); 233 static void pr_pack(u_char *, int, struct sockaddr_in *); 234 static u_int16_t in_cksum(u_int16_t *, u_int); 235 static void pr_saddr(u_char *); 236 static char *pr_addr(struct in_addr *); 237 static void pr_iph(struct icmp *, int); 238 static void pr_retip(struct icmp *, int); 239 static int pr_icmph(struct icmp *, struct sockaddr_in *, int); 240 static void jiggle(int), jiggle_flush(int); 241 static void gethost(const char *, const char *, 242 struct sockaddr_in *, char *, int); 243 static void usage(void); 244 #if defined(SIGINFO) && defined(NOKERNINFO) 245 static int fgtty(int, struct termios *); 246 #endif 247 248 int 249 main(int argc, char *argv[]) 250 { 251 int c, i, on = 1, hostind = 0; 252 long l; 253 u_char ttl = 0; 254 u_long tos = 0; 255 char *p; 256 #ifdef SIGINFO 257 struct termios ts; 258 #endif 259 #ifdef IPSEC 260 #ifdef IPSEC_POLICY_IPSEC 261 char *policy_in = NULL; 262 char *policy_out = NULL; 263 #endif 264 #endif 265 266 267 if ((s = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 268 err(1, "Cannot create socket"); 269 if ((sloop = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 270 err(1, "Cannot create socket"); 271 272 if (setuid(getuid()) == -1) 273 err(1, "setuid"); 274 275 setprogname(argv[0]); 276 277 #ifndef IPSEC 278 #define IPSECOPT 279 #else 280 #ifdef IPSEC_POLICY_IPSEC 281 #define IPSECOPT "E:" 282 #else 283 #define IPSECOPT "AE" 284 #endif /*IPSEC_POLICY_IPSEC*/ 285 #endif 286 while ((c = getopt(argc, argv, 287 "ac:dDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 288 #undef IPSECOPT 289 switch (c) { 290 case 'a': 291 pingflags |= F_AUDIBLE; 292 break; 293 case 'c': 294 npackets = strtol(optarg, &p, 0); 295 if (*p != '\0' || npackets <= 0) 296 errx(1, "Bad/invalid number of packets"); 297 break; 298 case 'D': 299 pingflags |= F_DF; 300 break; 301 case 'd': 302 options |= SO_DEBUG; 303 break; 304 case 'f': 305 pingflags |= F_FLOOD; 306 break; 307 case 'h': 308 hostind = optind-1; 309 break; 310 case 'i': /* wait between sending packets */ 311 interval = strtod(optarg, &p); 312 if (*p != '\0' || interval <= 0) 313 errx(1, "Bad/invalid interval %s", optarg); 314 break; 315 case 'l': 316 preload = strtol(optarg, &p, 0); 317 if (*p != '\0' || preload < 0) 318 errx(1, "Bad/invalid preload value %s", 319 optarg); 320 break; 321 case 'n': 322 pingflags |= F_NUMERIC; 323 break; 324 case 'o': 325 pingflags |= F_ONCE; 326 break; 327 case 'p': /* fill buffer with user pattern */ 328 if (pingflags & F_PING_RANDOM) 329 errx(1, "Only one of -P and -p allowed"); 330 pingflags |= F_PING_FILLED; 331 fill_pat = optarg; 332 break; 333 case 'P': 334 if (pingflags & F_PING_FILLED) 335 errx(1, "Only one of -P and -p allowed"); 336 pingflags |= F_PING_RANDOM; 337 break; 338 case 'q': 339 pingflags |= F_QUIET; 340 break; 341 case 'Q': 342 pingflags |= F_SEMI_QUIET; 343 break; 344 case 'r': 345 options |= SO_DONTROUTE; 346 break; 347 case 's': /* size of packet to send */ 348 datalen = strtol(optarg, &p, 0); 349 if (*p != '\0' || datalen < 0) 350 errx(1, "Bad/invalid packet size %s", optarg); 351 if (datalen > MAXPACKET) 352 errx(1, "packet size is too large"); 353 break; 354 case 'v': 355 pingflags |= F_VERBOSE; 356 break; 357 case 'R': 358 pingflags |= F_RECORD_ROUTE; 359 break; 360 case 'L': 361 pingflags |= F_MCAST_NOLOOP; 362 break; 363 case 't': 364 tos = strtoul(optarg, &p, 0); 365 if (*p != '\0' || tos > 0xFF) 366 errx(1, "bad tos value: %s", optarg); 367 break; 368 case 'T': 369 l = strtol(optarg, &p, 0); 370 if (*p != '\0' || l > 255 || l <= 0) 371 errx(1, "ttl out of range"); 372 ttl = (u_char)l; /* cannot check >255 otherwise */ 373 break; 374 case 'I': 375 pingflags |= F_SOURCE_ADDR; 376 gethost("-I", optarg, &src_addr, 0, 0); 377 break; 378 case 'g': 379 pingflags |= F_SOURCE_ROUTE; 380 gethost("-g", optarg, &send_addr, 0, 0); 381 break; 382 case 'w': 383 maxwait = strtod(optarg, &p); 384 if (*p != '\0' || maxwait <= 0) 385 errx(1, "Bad/invalid maxwait time %s", optarg); 386 break; 387 #ifdef IPSEC 388 #ifdef IPSEC_POLICY_IPSEC 389 case 'E': 390 pingflags |= F_POLICY; 391 if (!strncmp("in", optarg, 2)) { 392 policy_in = strdup(optarg); 393 if (!policy_in) 394 err(1, "strdup"); 395 } else if (!strncmp("out", optarg, 3)) { 396 policy_out = strdup(optarg); 397 if (!policy_out) 398 err(1, "strdup"); 399 } else 400 errx(1, "invalid security policy"); 401 break; 402 #else 403 case 'A': 404 pingflags |= F_AUTHHDR; 405 break; 406 case 'E': 407 pingflags |= F_ENCRYPT; 408 break; 409 #endif /*IPSEC_POLICY_IPSEC*/ 410 #endif /*IPSEC*/ 411 default: 412 usage(); 413 break; 414 } 415 } 416 417 if (interval == 0) 418 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 419 #ifndef sgi 420 if (pingflags & F_FLOOD && getuid()) 421 errx(1, "Must be superuser to use -f"); 422 if (interval < 1.0 && getuid()) 423 errx(1, "Must be superuser to use < 1 sec ping interval"); 424 if (preload > 0 && getuid()) 425 errx(1, "Must be superuser to use -l"); 426 #endif 427 sec_to_timeval(interval, &interval_tv); 428 429 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 430 warnx("Sorry, no audible output for flood pings"); 431 432 if (npackets != 0) { 433 npackets += preload; 434 } else { 435 npackets = INT_MAX; 436 } 437 438 if (hostind == 0) { 439 if (optind != argc-1) 440 usage(); 441 else 442 hostind = optind; 443 } 444 else if (hostind >= argc - 1) 445 usage(); 446 447 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 448 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 449 pingflags |= F_MCAST; 450 if (!(pingflags & F_SOURCE_ROUTE)) 451 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 452 453 loc_addr.sin_family = AF_INET; 454 loc_addr.sin_len = sizeof(struct sockaddr_in); 455 loc_addr.sin_addr.s_addr = htonl((127<<24)+1); 456 457 if (datalen >= PHDR_LEN) /* can we time them? */ 458 pingflags |= F_TIMING; 459 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 460 if ((packet = (u_char *)malloc(packlen)) == NULL) 461 err(1, "Out of memory"); 462 463 if (pingflags & F_PING_FILLED) { 464 fill(); 465 } else if (pingflags & F_PING_RANDOM) { 466 rnd_fill(); 467 } else { 468 for (i = PHDR_LEN; i < datalen; i++) 469 opack_icmp.icmp_data[i] = i; 470 } 471 472 ident = htons(getpid()) & 0xFFFF; 473 474 if (options & SO_DEBUG) { 475 if (setsockopt(s, SOL_SOCKET, SO_DEBUG, 476 (char *)&on, sizeof(on)) == -1) 477 warn("Can't turn on socket debugging"); 478 } 479 if (options & SO_DONTROUTE) { 480 if (setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 481 (char *)&on, sizeof(on)) == -1) 482 warn("SO_DONTROUTE"); 483 } 484 485 if (options & SO_DEBUG) { 486 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 487 (char *)&on, sizeof(on)) == -1) 488 warn("Can't turn on socket debugging"); 489 } 490 if (options & SO_DONTROUTE) { 491 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 492 (char *)&on, sizeof(on)) == -1) 493 warn("SO_DONTROUTE"); 494 } 495 496 if (pingflags & F_SOURCE_ROUTE) { 497 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 498 optspace[IPOPT_OLEN] = optlen = 7; 499 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 500 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 501 sizeof(whereto.sin_addr)); 502 optspace[optlen++] = IPOPT_NOP; 503 } 504 if (pingflags & F_RECORD_ROUTE) { 505 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 506 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 507 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 508 optlen = MAX_IPOPTLEN; 509 } 510 /* this leaves opack_ip 0(mod 4) aligned */ 511 opack_ip = (struct ip *)((char *)&out_pack.o_ip 512 + sizeof(out_pack.o_opt) 513 - optlen); 514 (void) memcpy(opack_ip + 1, optspace, optlen); 515 516 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 517 err(1, "Can't set special IP header"); 518 519 opack_ip->ip_v = IPVERSION; 520 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 521 opack_ip->ip_tos = tos; 522 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 523 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 524 opack_ip->ip_p = IPPROTO_ICMP; 525 opack_ip->ip_src = src_addr.sin_addr; 526 opack_ip->ip_dst = send_addr.sin_addr; 527 528 if (pingflags & F_MCAST) { 529 if (pingflags & F_MCAST_NOLOOP) { 530 u_char loop = 0; 531 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 532 (char *) &loop, 1) < 0) 533 err(1, "Can't disable multicast loopback"); 534 } 535 536 if (ttl != 0 537 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 538 (char *) &ttl, 1) < 0) 539 err(1, "Can't set multicast time-to-live"); 540 541 if ((pingflags & F_SOURCE_ADDR) 542 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 543 (char *) &src_addr.sin_addr, 544 sizeof(src_addr.sin_addr)) < 0) 545 err(1, "Can't set multicast source interface"); 546 547 } else if (pingflags & F_SOURCE_ADDR) { 548 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 549 (char *) &src_addr.sin_addr, 550 sizeof(src_addr.sin_addr)) < 0) 551 err(1, "Can't set source interface/address"); 552 } 553 #ifdef IPSEC 554 #ifdef IPSEC_POLICY_IPSEC 555 { 556 char *buf; 557 if (pingflags & F_POLICY) { 558 if (policy_in != NULL) { 559 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 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 if (policy_out != NULL) { 569 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 570 if (buf == NULL) 571 errx(1, "%s", ipsec_strerror()); 572 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 573 buf, ipsec_get_policylen(buf)) < 0) { 574 err(1, "ipsec policy cannot be configured"); 575 } 576 free(buf); 577 } 578 } 579 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 580 if (buf == NULL) 581 errx(1, "%s", ipsec_strerror()); 582 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 583 buf, ipsec_get_policylen(buf)) < 0) { 584 #if 0 585 warnx("ipsec is not configured"); 586 #else 587 /* ignore it, should be okay */ 588 #endif 589 } 590 free(buf); 591 } 592 #else 593 { 594 int optval; 595 if (pingflags & F_AUTHHDR) { 596 optval = IPSEC_LEVEL_REQUIRE; 597 #ifdef IP_AUTH_TRANS_LEVEL 598 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 599 (char *)&optval, sizeof(optval)); 600 #else 601 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 602 (char *)&optval, sizeof(optval)); 603 #endif 604 } 605 if (pingflags & F_ENCRYPT) { 606 optval = IPSEC_LEVEL_REQUIRE; 607 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 608 (char *)&optval, sizeof(optval)); 609 } 610 optval = IPSEC_LEVEL_BYPASS; 611 #ifdef IP_AUTH_TRANS_LEVEL 612 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 613 (char *)&optval, sizeof(optval)); 614 #else 615 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 616 (char *)&optval, sizeof(optval)); 617 #endif 618 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 619 (char *)&optval, sizeof(optval)); 620 } 621 #endif /*IPSEC_POLICY_IPSEC*/ 622 #endif /*IPSEC*/ 623 624 (void)printf("PING %s (%s): %d data bytes\n", hostname, 625 inet_ntoa(whereto.sin_addr), datalen); 626 627 /* When pinging the broadcast address, you can get a lot 628 * of answers. Doing something so evil is useful if you 629 * are trying to stress the ethernet, or just want to 630 * fill the arp cache to get some stuff for /etc/ethers. 631 */ 632 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 633 (char*)&bufspace, sizeof(bufspace))) { 634 if ((bufspace -= 4096) <= 0) 635 err(1, "Cannot set the receive buffer size"); 636 } 637 638 /* make it possible to send giant probes, but do not worry now 639 * if it fails, since we probably won't send giant probes. 640 */ 641 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 642 (char*)&bufspace, sizeof(bufspace)); 643 644 (void)signal(SIGINT, prefinish); 645 646 #if defined(SIGINFO) && defined(NOKERNINFO) 647 if (fgtty(STDIN_FILENO, &ts) != -1) { 648 reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 649 ts.c_lflag |= NOKERNINFO; 650 (void)tcsetattr(STDIN_FILENO, TCSANOW, &ts); 651 } 652 #endif 653 654 #ifdef SIGINFO 655 (void)signal(SIGINFO, prtsig); 656 #else 657 (void)signal(SIGQUIT, prtsig); 658 #endif 659 (void)signal(SIGCONT, prtsig); 660 661 /* fire off them quickies */ 662 for (i = 0; i < preload; i++) { 663 (void)gettimeofday(&now, 0); 664 pinger(); 665 } 666 667 doit(); 668 return 0; 669 } 670 671 672 static void 673 doit(void) 674 { 675 int cc; 676 struct sockaddr_in from; 677 int fromlen; 678 double sec, last, d_last; 679 struct pollfd fdmaskp[1]; 680 681 (void)gettimeofday(&clear_cache,0); 682 if (maxwait != 0) { 683 last = timeval_to_sec(&clear_cache) + maxwait; 684 d_last = 0; 685 } else { 686 last = 0; 687 d_last = 365*24*60*60; 688 } 689 690 do { 691 (void)gettimeofday(&now,0); 692 693 if (last != 0) 694 d_last = last - timeval_to_sec(&now); 695 696 if (ntransmitted < npackets && d_last > 0) { 697 /* send if within 100 usec or late for next packet */ 698 sec = diffsec(&next_tx,&now); 699 if (sec <= 0.0001 || 700 (lastrcvd && (pingflags & F_FLOOD))) { 701 pinger(); 702 sec = diffsec(&next_tx,&now); 703 } 704 if (sec < 0.0) 705 sec = 0.0; 706 if (d_last < sec) 707 sec = d_last; 708 709 } else { 710 /* For the last response, wait twice as long as the 711 * worst case seen, or 10 times as long as the 712 * maximum interpacket interval, whichever is longer. 713 */ 714 sec = MAX(2 * tmax, 10 * interval) - 715 diffsec(&now, &last_tx); 716 if (d_last < sec) 717 sec = d_last; 718 if (sec <= 0) 719 break; 720 } 721 722 723 fdmaskp[0].fd = s; 724 fdmaskp[0].events = POLLIN; 725 cc = poll(fdmaskp, 1, (int)(sec * 1000)); 726 if (cc <= 0) { 727 if (cc < 0) { 728 if (errno == EINTR) 729 continue; 730 jiggle_flush(1); 731 err(1, "poll"); 732 } 733 continue; 734 } 735 736 fromlen = sizeof(from); 737 cc = recvfrom(s, (char *) packet, packlen, 738 0, (struct sockaddr *)&from, 739 &fromlen); 740 if (cc < 0) { 741 if (errno != EINTR) { 742 jiggle_flush(1); 743 warn("recvfrom"); 744 (void)fflush(stderr); 745 } 746 continue; 747 } 748 (void)gettimeofday(&now, 0); 749 pr_pack(packet, cc, &from); 750 751 } while (nreceived < npackets 752 && (nreceived == 0 || !(pingflags & F_ONCE))); 753 754 finish(0); 755 } 756 757 758 static void 759 jiggle_flush(int nl) /* new line if there are dots */ 760 { 761 int serrno = errno; 762 763 if (jiggle_cnt > 0) { 764 total_jiggled += jiggle_cnt; 765 jiggle_direction = 1; 766 do { 767 (void)putchar('.'); 768 } while (--jiggle_cnt > 0); 769 770 } else if (jiggle_cnt < 0) { 771 total_jiggled -= jiggle_cnt; 772 jiggle_direction = -1; 773 do { 774 (void)putchar('\b'); 775 } while (++jiggle_cnt < 0); 776 } 777 778 if (nl) { 779 if (total_jiggled != 0) 780 (void)putchar('\n'); 781 total_jiggled = 0; 782 jiggle_direction = -1; 783 } 784 785 (void)fflush(stdout); 786 (void)fflush(stderr); 787 jiggle_time = now; 788 errno = serrno; 789 } 790 791 792 /* jiggle the cursor for flood-ping 793 */ 794 static void 795 jiggle(int delta) 796 { 797 double dt; 798 799 if (pingflags & F_QUIET) 800 return; 801 802 /* do not back up into messages */ 803 if (total_jiggled+jiggle_cnt+delta < 0) 804 return; 805 806 jiggle_cnt += delta; 807 808 /* flush the FLOOD dots when things are quiet 809 * or occassionally to make the cursor jiggle. 810 */ 811 dt = diffsec(&last_tx, &jiggle_time); 812 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 813 jiggle_flush(0); 814 } 815 816 817 /* 818 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 819 * will be added on by the kernel. The ID field is our UNIX process ID, 820 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 821 * of the data portion are used to hold a UNIX "timeval" struct in VAX 822 * byte-order, to compute the round-trip time. 823 */ 824 static void 825 pinger(void) 826 { 827 struct tv32 tv32; 828 int i, cc, sw; 829 830 opack_icmp.icmp_code = 0; 831 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 832 833 /* clear the cached route in the kernel after an ICMP 834 * response such as a Redirect is seen to stop causing 835 * more such packets. Also clear the cached route 836 * periodically in case of routing changes that make 837 * black holes come and go. 838 */ 839 if (clear_cache.tv_sec != now.tv_sec) { 840 opack_icmp.icmp_type = ICMP_ECHOREPLY; 841 opack_icmp.icmp_id = ~ident; 842 opack_icmp.icmp_cksum = 0; 843 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 844 PHDR_LEN); 845 sw = 0; 846 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 847 (char *)&sw,sizeof(sw)) < 0) 848 err(1, "Can't turn off special IP header"); 849 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 850 (struct sockaddr *)&loc_addr, 851 sizeof(struct sockaddr_in)) < 0) { 852 /* 853 * XXX: we only report this as a warning in verbose 854 * mode because people get confused when they see 855 * this error when they are running in single user 856 * mode and they have not configured lo0 857 */ 858 if (pingflags & F_VERBOSE) 859 warn("failed to clear cached route"); 860 } 861 sw = 1; 862 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 863 (char *)&sw, sizeof(sw)) < 0) 864 err(1, "Can't set special IP header"); 865 866 (void)gettimeofday(&clear_cache,0); 867 } 868 869 opack_icmp.icmp_type = ICMP_ECHO; 870 opack_icmp.icmp_id = ident; 871 tv32.tv32_sec = htonl(now.tv_sec); 872 tv32.tv32_usec = htonl(now.tv_usec); 873 if (pingflags & F_TIMING) 874 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 875 cc = datalen + PHDR_LEN; 876 opack_icmp.icmp_cksum = 0; 877 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 878 879 cc += opack_ip->ip_hl<<2; 880 opack_ip->ip_len = cc; 881 i = sendto(s, (char *) opack_ip, cc, 0, 882 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 883 if (i != cc) { 884 jiggle_flush(1); 885 if (i < 0) 886 warn("sendto"); 887 else 888 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 889 (void)fflush(stderr); 890 } 891 lastrcvd = 0; 892 893 CLR(ntransmitted); 894 ntransmitted++; 895 896 last_tx = now; 897 if (next_tx.tv_sec == 0) { 898 first_tx = now; 899 next_tx = now; 900 } 901 902 /* Transmit regularly, at always the same microsecond in the 903 * second when going at one packet per second. 904 * If we are at most 100 ms behind, send extras to get caught up. 905 * Otherwise, skip packets we were too slow to send. 906 */ 907 if (diffsec(&next_tx, &now) <= interval) { 908 do { 909 timevaladd(&next_tx, &interval_tv); 910 } while (diffsec(&next_tx, &now) < -0.1); 911 } 912 913 if (pingflags & F_FLOOD) 914 jiggle(1); 915 916 /* While the packet is going out, ready buffer for the next 917 * packet. Use a fast but not very good random number generator. 918 */ 919 if (pingflags & F_PING_RANDOM) 920 rnd_fill(); 921 } 922 923 924 static void 925 pr_pack_sub(int cc, 926 char *addr, 927 int seqno, 928 int dupflag, 929 int ttl, 930 double triptime) 931 { 932 jiggle_flush(1); 933 934 if (pingflags & F_FLOOD) 935 return; 936 937 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 938 if (dupflag) 939 (void)printf(" DUP!"); 940 (void)printf(" ttl=%d", ttl); 941 if (pingflags & F_TIMING) 942 (void)printf(" time=%.3f ms", triptime*1000.0); 943 944 /* 945 * Send beep to stderr, since that's more likely than stdout 946 * to go to a terminal.. 947 */ 948 if (pingflags & F_AUDIBLE && !dupflag) 949 (void)fprintf(stderr,"\a"); 950 } 951 952 953 /* 954 * Print out the packet, if it came from us. This logic is necessary 955 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 956 * which arrive ('tis only fair). This permits multiple copies of this 957 * program to be run without having intermingled output (or statistics!). 958 */ 959 static void 960 pr_pack(u_char *buf, 961 int tot_len, 962 struct sockaddr_in *from) 963 { 964 struct ip *ip; 965 struct icmp *icp; 966 int i, j, net_len; 967 u_char *cp; 968 static int old_rrlen; 969 static char old_rr[MAX_IPOPTLEN]; 970 int hlen, dupflag = 0, dumped; 971 double triptime = 0.0; 972 #define PR_PACK_SUB() {if (!dumped) { \ 973 dumped = 1; \ 974 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 975 ntohs((u_int16_t)icp->icmp_seq), \ 976 dupflag, ip->ip_ttl, triptime);}} 977 978 /* Check the IP header */ 979 ip = (struct ip *) buf; 980 hlen = ip->ip_hl << 2; 981 if (tot_len < hlen + ICMP_MINLEN) { 982 if (pingflags & F_VERBOSE) { 983 jiggle_flush(1); 984 (void)printf("packet too short (%d bytes) from %s\n", 985 tot_len, inet_ntoa(from->sin_addr)); 986 } 987 return; 988 } 989 990 /* Now the ICMP part */ 991 dumped = 0; 992 net_len = tot_len - hlen; 993 icp = (struct icmp *)(buf + hlen); 994 if (icp->icmp_type == ICMP_ECHOREPLY 995 && icp->icmp_id == ident) { 996 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 997 lastrcvd = 1; 998 last_rx = now; 999 if (first_rx.tv_sec == 0) 1000 first_rx = last_rx; 1001 nreceived++; 1002 if (pingflags & F_TIMING) { 1003 struct timeval tv; 1004 struct tv32 tv32; 1005 1006 (void) memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 1007 tv.tv_sec = ntohl(tv32.tv32_sec); 1008 tv.tv_usec = ntohl(tv32.tv32_usec); 1009 triptime = diffsec(&last_rx, &tv); 1010 tsum += triptime; 1011 tsumsq += triptime * triptime; 1012 if (triptime < tmin) 1013 tmin = triptime; 1014 if (triptime > tmax) 1015 tmax = triptime; 1016 } 1017 1018 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1019 nrepeats++, nreceived--; 1020 dupflag=1; 1021 } else { 1022 SET(ntohs((u_int16_t)icp->icmp_seq)); 1023 } 1024 1025 if (tot_len != opack_ip->ip_len) { 1026 PR_PACK_SUB(); 1027 (void)printf("\nwrong total length %d instead of %d", 1028 tot_len, opack_ip->ip_len); 1029 } 1030 1031 if (!dupflag) { 1032 static u_int16_t last_seqno = 0xffff; 1033 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1034 u_int16_t gap = seqno - (last_seqno + 1); 1035 if (gap > 0 && gap < 0x8000 && 1036 (pingflags & F_VERBOSE)) { 1037 (void)printf("[*** sequence gap of %u " 1038 "packets from %u ... %u ***]\n", gap, 1039 (u_int16_t) (last_seqno + 1), 1040 (u_int16_t) (seqno - 1)); 1041 if (pingflags & F_QUIET) 1042 summary(0); 1043 } 1044 1045 if (gap < 0x8000) 1046 last_seqno = seqno; 1047 } 1048 1049 if (pingflags & F_QUIET) 1050 return; 1051 1052 if (!(pingflags & F_FLOOD)) 1053 PR_PACK_SUB(); 1054 1055 /* check the data */ 1056 if (datalen > PHDR_LEN 1057 && !(pingflags & F_PING_RANDOM) 1058 && memcmp(&icp->icmp_data[PHDR_LEN], 1059 &opack_icmp.icmp_data[PHDR_LEN], 1060 datalen-PHDR_LEN)) { 1061 for (i=PHDR_LEN; i<datalen; i++) { 1062 if (icp->icmp_data[i] != 1063 opack_icmp.icmp_data[i]) 1064 break; 1065 } 1066 PR_PACK_SUB(); 1067 (void)printf("\nwrong data byte #%d should have been" 1068 " %#x but was %#x", i, 1069 (u_char)opack_icmp.icmp_data[i], 1070 (u_char)icp->icmp_data[i]); 1071 for (i=PHDR_LEN; i<datalen; i++) { 1072 if ((i%16) == PHDR_LEN) 1073 (void)printf("\n\t"); 1074 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1075 } 1076 } 1077 1078 } else { 1079 if (!pr_icmph(icp, from, net_len)) 1080 return; 1081 dumped = 2; 1082 } 1083 1084 /* Display any IP options */ 1085 cp = buf + sizeof(struct ip); 1086 while (hlen > (int)sizeof(struct ip)) { 1087 switch (*cp) { 1088 case IPOPT_EOL: 1089 hlen = 0; 1090 break; 1091 case IPOPT_LSRR: 1092 hlen -= 2; 1093 j = *++cp; 1094 ++cp; 1095 j -= IPOPT_MINOFF; 1096 if (j <= 0) 1097 continue; 1098 if (dumped <= 1) { 1099 j = ((j+3)/4)*4; 1100 hlen -= j; 1101 cp += j; 1102 break; 1103 } 1104 PR_PACK_SUB(); 1105 (void)printf("\nLSRR: "); 1106 for (;;) { 1107 pr_saddr(cp); 1108 cp += 4; 1109 hlen -= 4; 1110 j -= 4; 1111 if (j <= 0) 1112 break; 1113 (void)putchar('\n'); 1114 } 1115 break; 1116 case IPOPT_RR: 1117 j = *++cp; /* get length */ 1118 i = *++cp; /* and pointer */ 1119 hlen -= 2; 1120 if (i > j) 1121 i = j; 1122 i -= IPOPT_MINOFF; 1123 if (i <= 0) 1124 continue; 1125 if (dumped <= 1) { 1126 if (i == old_rrlen 1127 && !memcmp(cp, old_rr, i)) { 1128 if (dumped) 1129 (void)printf("\t(same route)"); 1130 j = ((i+3)/4)*4; 1131 hlen -= j; 1132 cp += j; 1133 break; 1134 } 1135 old_rrlen = i; 1136 (void) memcpy(old_rr, cp, i); 1137 } 1138 if (!dumped) { 1139 jiggle_flush(1); 1140 (void)printf("RR: "); 1141 dumped = 1; 1142 } else { 1143 (void)printf("\nRR: "); 1144 } 1145 for (;;) { 1146 pr_saddr(cp); 1147 cp += 4; 1148 hlen -= 4; 1149 i -= 4; 1150 if (i <= 0) 1151 break; 1152 (void)putchar('\n'); 1153 } 1154 break; 1155 case IPOPT_NOP: 1156 if (dumped <= 1) 1157 break; 1158 PR_PACK_SUB(); 1159 (void)printf("\nNOP"); 1160 break; 1161 #ifdef sgi 1162 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1163 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1164 case IPOPT_CIPSO: /* Commercial IPSO */ 1165 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1166 i = (unsigned)cp[1]; 1167 hlen -= i - 1; 1168 PR_PACK_SUB(); 1169 (void)printf("\nSEC:"); 1170 while (i--) { 1171 (void)printf(" %02x", *cp++); 1172 } 1173 cp--; 1174 break; 1175 } 1176 #endif 1177 default: 1178 PR_PACK_SUB(); 1179 (void)printf("\nunknown option 0x%x", *cp); 1180 break; 1181 } 1182 hlen--; 1183 cp++; 1184 } 1185 1186 if (dumped) { 1187 (void)putchar('\n'); 1188 (void)fflush(stdout); 1189 } else { 1190 jiggle(-1); 1191 } 1192 } 1193 1194 1195 /* Compute the IP checksum 1196 * This assumes the packet is less than 32K long. 1197 */ 1198 static u_int16_t 1199 in_cksum(u_int16_t *p, u_int len) 1200 { 1201 u_int32_t sum = 0; 1202 int nwords = len >> 1; 1203 1204 while (nwords-- != 0) 1205 sum += *p++; 1206 1207 if (len & 1) { 1208 union { 1209 u_int16_t w; 1210 u_int8_t c[2]; 1211 } u; 1212 u.c[0] = *(u_char *)p; 1213 u.c[1] = 0; 1214 sum += u.w; 1215 } 1216 1217 /* end-around-carry */ 1218 sum = (sum >> 16) + (sum & 0xffff); 1219 sum += (sum >> 16); 1220 return (~sum); 1221 } 1222 1223 1224 /* 1225 * compute the difference of two timevals in seconds 1226 */ 1227 static double 1228 diffsec(struct timeval *timenow, 1229 struct timeval *then) 1230 { 1231 return ((timenow->tv_sec - then->tv_sec)*1.0 1232 + (timenow->tv_usec - then->tv_usec)/1000000.0); 1233 } 1234 1235 1236 static void 1237 timevaladd(struct timeval *t1, 1238 struct timeval *t2) 1239 { 1240 1241 t1->tv_sec += t2->tv_sec; 1242 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1243 t1->tv_sec++; 1244 t1->tv_usec -= 1000000; 1245 } 1246 } 1247 1248 1249 static void 1250 sec_to_timeval(const double sec, struct timeval *tp) 1251 { 1252 tp->tv_sec = sec; 1253 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1254 } 1255 1256 1257 static double 1258 timeval_to_sec(const struct timeval *tp) 1259 { 1260 return tp->tv_sec + tp->tv_usec / 1000000.0; 1261 } 1262 1263 1264 /* 1265 * Print statistics. 1266 * Heavily buffered STDIO is used here, so that all the statistics 1267 * will be written with 1 sys-write call. This is nice when more 1268 * than one copy of the program is running on a terminal; it prevents 1269 * the statistics output from becomming intermingled. 1270 */ 1271 static void 1272 summary(int header) 1273 { 1274 jiggle_flush(1); 1275 1276 if (header) 1277 (void)printf("\n----%s PING Statistics----\n", hostname); 1278 (void)printf("%d packets transmitted, ", ntransmitted); 1279 (void)printf("%d packets received, ", nreceived); 1280 if (nrepeats) 1281 (void)printf("+%d duplicates, ", nrepeats); 1282 if (ntransmitted) { 1283 if (nreceived > ntransmitted) 1284 (void)printf("-- somebody's duplicating packets!"); 1285 else 1286 (void)printf("%.1f%% packet loss", 1287 (((ntransmitted-nreceived)*100.0) / 1288 ntransmitted)); 1289 } 1290 (void)printf("\n"); 1291 if (nreceived && (pingflags & F_TIMING)) { 1292 double n = nreceived + nrepeats; 1293 double avg = (tsum / n); 1294 double variance = 0.0; 1295 if (n>1) 1296 variance = (tsumsq - n*avg*avg) /(n-1); 1297 1298 printf("round-trip min/avg/max/stddev = " 1299 "%.3f/%.3f/%.3f/%.3f ms\n", 1300 tmin * 1000.0, avg * 1000.0, 1301 tmax * 1000.0, sqrt(variance) * 1000.0); 1302 if (pingflags & F_FLOOD) { 1303 double r = diffsec(&last_rx, &first_rx); 1304 double t = diffsec(&last_tx, &first_tx); 1305 if (r == 0) 1306 r = 0.0001; 1307 if (t == 0) 1308 t = 0.0001; 1309 (void)printf(" %.1f packets/sec sent, " 1310 " %.1f packets/sec received\n", 1311 ntransmitted/t, nreceived/r); 1312 } 1313 } 1314 } 1315 1316 1317 /* 1318 * Print statistics when SIGINFO is received. 1319 */ 1320 /* ARGSUSED */ 1321 static void 1322 prtsig(int dummy) 1323 { 1324 summary(0); 1325 #ifdef SIGINFO 1326 (void)signal(SIGINFO, prtsig); 1327 #else 1328 (void)signal(SIGQUIT, prtsig); 1329 #endif 1330 } 1331 1332 1333 /* 1334 * On the first SIGINT, allow any outstanding packets to dribble in 1335 */ 1336 static void 1337 prefinish(int dummy) 1338 { 1339 if (lastrcvd /* quit now if caught up */ 1340 || nreceived == 0) /* or if remote is dead */ 1341 finish(0); 1342 1343 (void)signal(dummy, finish); /* do this only the 1st time */ 1344 1345 if (npackets > ntransmitted) /* let the normal limit work */ 1346 npackets = ntransmitted; 1347 } 1348 1349 #if defined(SIGINFO) && defined(NOKERNINFO) 1350 static int 1351 fgtty(int fd, struct termios *ts) 1352 { 1353 pid_t ttypgrp, pgrp; 1354 1355 if (tcgetattr(fd, ts) == -1) 1356 return -1; 1357 if ((ttypgrp = tcgetpgrp(fd)) == -1) 1358 return -1; 1359 if ((pgrp = getpgid(0)) == -1) 1360 return -1; 1361 1362 return ttypgrp == pgrp ? 0 : -1; 1363 } 1364 #endif 1365 1366 /* 1367 * Print statistics and give up. 1368 */ 1369 /* ARGSUSED */ 1370 static void 1371 finish(int dummy) 1372 { 1373 #if defined(SIGINFO) && defined(NOKERNINFO) 1374 struct termios ts; 1375 1376 /* 1377 * Note that the following will suspend the ping program 1378 * if it is in the background. We could have used fgtty() 1379 * to avoid this, but then we would fail to restore the 1380 * tty setting. So we prefer to suspend here. XXX: NOKERNINFO 1381 * should prolly be a signal struct attribute 1382 */ 1383 if (reset_kerninfo && tcgetattr(STDIN_FILENO, &ts) != -1) { 1384 ts.c_lflag &= ~NOKERNINFO; 1385 (void)tcsetattr(STDIN_FILENO, TCSANOW, &ts); 1386 } 1387 (void)signal(SIGINFO, SIG_IGN); 1388 #else 1389 (void)signal(SIGQUIT, SIG_DFL); 1390 #endif 1391 1392 summary(1); 1393 exit(nreceived > 0 ? 0 : 2); 1394 } 1395 1396 1397 static int /* 0=do not print it */ 1398 ck_pr_icmph(struct icmp *icp, 1399 struct sockaddr_in *from, 1400 int cc, 1401 int override) /* 1=override VERBOSE if interesting */ 1402 { 1403 int hlen; 1404 struct ip ipb, *ip = &ipb; 1405 struct icmp icp2b, *icp2 = &icp2b; 1406 int res; 1407 1408 if (pingflags & F_VERBOSE) { 1409 res = 1; 1410 jiggle_flush(1); 1411 } else { 1412 res = 0; 1413 } 1414 1415 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1416 hlen = ip->ip_hl << 2; 1417 if (ip->ip_p == IPPROTO_ICMP 1418 && hlen + 6 <= cc) { 1419 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1420 if (icp2->icmp_id == ident) { 1421 /* remember to clear route cached in kernel 1422 * if this non-Echo-Reply ICMP message was for one 1423 * of our packets. 1424 */ 1425 clear_cache.tv_sec = 0; 1426 1427 if (!res && override 1428 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1429 jiggle_flush(1); 1430 (void)printf("%d bytes from %s: ", 1431 cc, pr_addr(&from->sin_addr)); 1432 res = 1; 1433 } 1434 } 1435 } 1436 1437 return res; 1438 } 1439 1440 1441 /* 1442 * Print a descriptive string about an ICMP header other than an echo reply. 1443 */ 1444 static int /* 0=printed nothing */ 1445 pr_icmph(struct icmp *icp, 1446 struct sockaddr_in *from, 1447 int cc) 1448 { 1449 switch (icp->icmp_type ) { 1450 case ICMP_UNREACH: 1451 if (!ck_pr_icmph(icp, from, cc, 1)) 1452 return 0; 1453 switch (icp->icmp_code) { 1454 case ICMP_UNREACH_NET: 1455 (void)printf("Destination Net Unreachable"); 1456 break; 1457 case ICMP_UNREACH_HOST: 1458 (void)printf("Destination Host Unreachable"); 1459 break; 1460 case ICMP_UNREACH_PROTOCOL: 1461 (void)printf("Destination Protocol Unreachable"); 1462 break; 1463 case ICMP_UNREACH_PORT: 1464 (void)printf("Destination Port Unreachable"); 1465 break; 1466 case ICMP_UNREACH_NEEDFRAG: 1467 (void)printf("frag needed and DF set. Next MTU=%d", 1468 ntohs(icp->icmp_nextmtu)); 1469 break; 1470 case ICMP_UNREACH_SRCFAIL: 1471 (void)printf("Source Route Failed"); 1472 break; 1473 case ICMP_UNREACH_NET_UNKNOWN: 1474 (void)printf("Unreachable unknown net"); 1475 break; 1476 case ICMP_UNREACH_HOST_UNKNOWN: 1477 (void)printf("Unreachable unknown host"); 1478 break; 1479 case ICMP_UNREACH_ISOLATED: 1480 (void)printf("Unreachable host isolated"); 1481 break; 1482 case ICMP_UNREACH_NET_PROHIB: 1483 (void)printf("Net prohibited access"); 1484 break; 1485 case ICMP_UNREACH_HOST_PROHIB: 1486 (void)printf("Host prohibited access"); 1487 break; 1488 case ICMP_UNREACH_TOSNET: 1489 (void)printf("Bad TOS for net"); 1490 break; 1491 case ICMP_UNREACH_TOSHOST: 1492 (void)printf("Bad TOS for host"); 1493 break; 1494 case 13: 1495 (void)printf("Communication prohibited"); 1496 break; 1497 case 14: 1498 (void)printf("Host precedence violation"); 1499 break; 1500 case 15: 1501 (void)printf("Precedence cutoff"); 1502 break; 1503 default: 1504 (void)printf("Bad Destination Unreachable Code: %d", 1505 icp->icmp_code); 1506 break; 1507 } 1508 /* Print returned IP header information */ 1509 pr_retip(icp, cc); 1510 break; 1511 1512 case ICMP_SOURCEQUENCH: 1513 if (!ck_pr_icmph(icp, from, cc, 1)) 1514 return 0; 1515 (void)printf("Source Quench"); 1516 pr_retip(icp, cc); 1517 break; 1518 1519 case ICMP_REDIRECT: 1520 if (!ck_pr_icmph(icp, from, cc, 1)) 1521 return 0; 1522 switch (icp->icmp_code) { 1523 case ICMP_REDIRECT_NET: 1524 (void)printf("Redirect Network"); 1525 break; 1526 case ICMP_REDIRECT_HOST: 1527 (void)printf("Redirect Host"); 1528 break; 1529 case ICMP_REDIRECT_TOSNET: 1530 (void)printf("Redirect Type of Service and Network"); 1531 break; 1532 case ICMP_REDIRECT_TOSHOST: 1533 (void)printf("Redirect Type of Service and Host"); 1534 break; 1535 default: 1536 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1537 break; 1538 } 1539 (void)printf(" New router addr: %s", 1540 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1541 pr_retip(icp, cc); 1542 break; 1543 1544 case ICMP_ECHO: 1545 if (!ck_pr_icmph(icp, from, cc, 0)) 1546 return 0; 1547 (void)printf("Echo Request: ID=%d seq=%d", 1548 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1549 break; 1550 1551 case ICMP_ECHOREPLY: 1552 /* displaying other's pings is too noisey */ 1553 #if 0 1554 if (!ck_pr_icmph(icp, from, cc, 0)) 1555 return 0; 1556 (void)printf("Echo Reply: ID=%d seq=%d", 1557 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1558 break; 1559 #else 1560 return 0; 1561 #endif 1562 1563 case ICMP_ROUTERADVERT: 1564 if (!ck_pr_icmph(icp, from, cc, 0)) 1565 return 0; 1566 (void)printf("Router Discovery Advert"); 1567 break; 1568 1569 case ICMP_ROUTERSOLICIT: 1570 if (!ck_pr_icmph(icp, from, cc, 0)) 1571 return 0; 1572 (void)printf("Router Discovery Solicit"); 1573 break; 1574 1575 case ICMP_TIMXCEED: 1576 if (!ck_pr_icmph(icp, from, cc, 1)) 1577 return 0; 1578 switch (icp->icmp_code ) { 1579 case ICMP_TIMXCEED_INTRANS: 1580 (void)printf("Time To Live exceeded"); 1581 break; 1582 case ICMP_TIMXCEED_REASS: 1583 (void)printf("Frag reassembly time exceeded"); 1584 break; 1585 default: 1586 (void)printf("Time exceeded, Bad Code: %d", 1587 icp->icmp_code); 1588 break; 1589 } 1590 pr_retip(icp, cc); 1591 break; 1592 1593 case ICMP_PARAMPROB: 1594 if (!ck_pr_icmph(icp, from, cc, 1)) 1595 return 0; 1596 (void)printf("Parameter problem: pointer = 0x%02x", 1597 icp->icmp_hun.ih_pptr); 1598 pr_retip(icp, cc); 1599 break; 1600 1601 case ICMP_TSTAMP: 1602 if (!ck_pr_icmph(icp, from, cc, 0)) 1603 return 0; 1604 (void)printf("Timestamp"); 1605 break; 1606 1607 case ICMP_TSTAMPREPLY: 1608 if (!ck_pr_icmph(icp, from, cc, 0)) 1609 return 0; 1610 (void)printf("Timestamp Reply"); 1611 break; 1612 1613 case ICMP_IREQ: 1614 if (!ck_pr_icmph(icp, from, cc, 0)) 1615 return 0; 1616 (void)printf("Information Request"); 1617 break; 1618 1619 case ICMP_IREQREPLY: 1620 if (!ck_pr_icmph(icp, from, cc, 0)) 1621 return 0; 1622 (void)printf("Information Reply"); 1623 break; 1624 1625 case ICMP_MASKREQ: 1626 if (!ck_pr_icmph(icp, from, cc, 0)) 1627 return 0; 1628 (void)printf("Address Mask Request"); 1629 break; 1630 1631 case ICMP_MASKREPLY: 1632 if (!ck_pr_icmph(icp, from, cc, 0)) 1633 return 0; 1634 (void)printf("Address Mask Reply"); 1635 break; 1636 1637 default: 1638 if (!ck_pr_icmph(icp, from, cc, 0)) 1639 return 0; 1640 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1641 if (pingflags & F_VERBOSE) 1642 pr_iph(icp, cc); 1643 } 1644 1645 return 1; 1646 } 1647 1648 1649 /* 1650 * Print an IP header with options. 1651 */ 1652 static void 1653 pr_iph(struct icmp *icp, 1654 int cc) 1655 { 1656 int hlen; 1657 u_char *cp; 1658 struct ip ipb, *ip = &ipb; 1659 1660 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1661 1662 hlen = ip->ip_hl << 2; 1663 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1664 1665 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1666 (void)printf(" %1x %1x %02x %04x %04x", 1667 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1668 (void)printf(" %1x %04x", 1669 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1670 (void)printf(" %02x %02x %04x", 1671 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1672 (void)printf(" %15s ", 1673 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1674 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1675 /* dump any option bytes */ 1676 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1677 (void)printf("%02x", *cp++); 1678 } 1679 } 1680 1681 /* 1682 * Print an ASCII host address starting from a string of bytes. 1683 */ 1684 static void 1685 pr_saddr(u_char *cp) 1686 { 1687 n_long l; 1688 struct in_addr addr; 1689 1690 l = (u_char)*++cp; 1691 l = (l<<8) + (u_char)*++cp; 1692 l = (l<<8) + (u_char)*++cp; 1693 l = (l<<8) + (u_char)*++cp; 1694 addr.s_addr = htonl(l); 1695 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1696 } 1697 1698 1699 /* 1700 * Return an ASCII host address 1701 * as a dotted quad and optionally with a hostname 1702 */ 1703 static char * 1704 pr_addr(struct in_addr *addr) /* in network order */ 1705 { 1706 struct hostent *hp; 1707 static char buf[MAXHOSTNAMELEN+4+16+1]; 1708 1709 if ((pingflags & F_NUMERIC) 1710 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1711 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1712 } else { 1713 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1714 inet_ntoa(*addr)); 1715 } 1716 1717 return buf; 1718 } 1719 1720 /* 1721 * Dump some info on a returned (via ICMP) IP packet. 1722 */ 1723 static void 1724 pr_retip(struct icmp *icp, 1725 int cc) 1726 { 1727 int hlen; 1728 u_char *cp; 1729 struct ip ipb, *ip = &ipb; 1730 1731 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1732 1733 if (pingflags & F_VERBOSE) 1734 pr_iph(icp, cc); 1735 1736 hlen = ip->ip_hl << 2; 1737 cp = (u_char *) &icp->icmp_data[hlen]; 1738 1739 if (ip->ip_p == IPPROTO_TCP) { 1740 if (pingflags & F_VERBOSE) 1741 (void)printf("\n TCP: from port %u, to port %u", 1742 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1743 } else if (ip->ip_p == IPPROTO_UDP) { 1744 if (pingflags & F_VERBOSE) 1745 (void)printf("\n UDP: from port %u, to port %u", 1746 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1747 } else if (ip->ip_p == IPPROTO_ICMP) { 1748 struct icmp icp2; 1749 (void) memcpy(&icp2, cp, sizeof(icp2)); 1750 if (icp2.icmp_type == ICMP_ECHO) { 1751 if (pingflags & F_VERBOSE) 1752 (void)printf("\n ID=%u icmp_seq=%u", 1753 ntohs((u_int16_t)icp2.icmp_id), 1754 ntohs((u_int16_t)icp2.icmp_seq)); 1755 else 1756 (void)printf(" for icmp_seq=%u", 1757 ntohs((u_int16_t)icp2.icmp_seq)); 1758 } 1759 } 1760 } 1761 1762 static void 1763 fill(void) 1764 { 1765 int i, j, k; 1766 char *cp; 1767 int pat[16]; 1768 1769 for (cp = fill_pat; *cp != '\0'; cp++) { 1770 if (!isxdigit((unsigned char)*cp)) 1771 break; 1772 } 1773 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1774 (void)fflush(stdout); 1775 errx(1, "\"-p %s\": patterns must be specified with" 1776 " 1-32 hex digits\n", 1777 fill_pat); 1778 } 1779 1780 i = sscanf(fill_pat, 1781 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1782 &pat[0], &pat[1], &pat[2], &pat[3], 1783 &pat[4], &pat[5], &pat[6], &pat[7], 1784 &pat[8], &pat[9], &pat[10], &pat[11], 1785 &pat[12], &pat[13], &pat[14], &pat[15]); 1786 1787 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1788 opack_icmp.icmp_data[k] = pat[j]; 1789 if (++j >= i) 1790 j = 0; 1791 } 1792 1793 if (!(pingflags & F_QUIET)) { 1794 (void)printf("PATTERN: 0x"); 1795 for (j=0; j<i; j++) 1796 (void)printf("%02x", 1797 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1798 (void)printf("\n"); 1799 } 1800 1801 } 1802 1803 1804 static void 1805 rnd_fill(void) 1806 { 1807 static u_int32_t rnd; 1808 int i; 1809 1810 for (i = PHDR_LEN; i < datalen; i++) { 1811 rnd = (3141592621U * rnd + 663896637U); 1812 opack_icmp.icmp_data[i] = rnd>>24; 1813 } 1814 } 1815 1816 1817 static void 1818 gethost(const char *arg, 1819 const char *name, 1820 struct sockaddr_in *sa, 1821 char *realname, 1822 int realname_len) 1823 { 1824 struct hostent *hp; 1825 1826 (void)memset(sa, 0, sizeof(*sa)); 1827 sa->sin_family = AF_INET; 1828 sa->sin_len = sizeof(struct sockaddr_in); 1829 1830 /* If it is an IP address, try to convert it to a name to 1831 * have something nice to display. 1832 */ 1833 if (inet_aton(name, &sa->sin_addr) != 0) { 1834 if (realname) { 1835 if (pingflags & F_NUMERIC) 1836 hp = 0; 1837 else 1838 hp = gethostbyaddr((char *)&sa->sin_addr, 1839 sizeof(sa->sin_addr), 1840 AF_INET); 1841 (void)strlcpy(realname, hp ? hp->h_name : name, 1842 realname_len); 1843 } 1844 return; 1845 } 1846 1847 hp = gethostbyname(name); 1848 if (!hp) 1849 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1850 1851 if (hp->h_addrtype != AF_INET) 1852 errx(1, "%s only supported with IP", arg); 1853 1854 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1855 1856 if (realname) 1857 (void)strlcpy(realname, hp->h_name, realname_len); 1858 } 1859 1860 1861 static void 1862 usage(void) 1863 { 1864 #ifdef IPSEC 1865 #ifdef IPSEC_POLICY_IPSEC 1866 #define IPSECOPT "\n [-E policy] " 1867 #else 1868 #define IPSECOPT "\n [-AE] " 1869 #endif /*IPSEC_POLICY_IPSEC*/ 1870 #else 1871 #define IPSECOPT "" 1872 #endif /*IPSEC*/ 1873 1874 (void)fprintf(stderr, "usage: \n" 1875 "%s [-adDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1876 " [-i interval] [-I addr]\n" 1877 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1878 " [-w maxwait] " IPSECOPT "host\n", 1879 getprogname()); 1880 exit(1); 1881 } 1882
Indexes created Thu Oct 23 22:10:10 GMT 2025