ping.c revision 1.115
1 /* $NetBSD: ping.c,v 1.115 2017/01/11 12:13:52 joerg 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 1.115 2017/01/11 12:13:52 joerg Exp $"); 62 #endif 63 64 #include <stdio.h> 65 #include <stddef.h> 66 #include <errno.h> 67 #include <signal.h> 68 #include <sys/time.h> 69 #include <sys/types.h> 70 #include <sys/param.h> 71 #include <sys/socket.h> 72 #include <sys/file.h> 73 #include <termios.h> 74 #include <stdlib.h> 75 #include <unistd.h> 76 #include <poll.h> 77 #include <limits.h> 78 #include <math.h> 79 #include <string.h> 80 #include <err.h> 81 82 #include <netinet/in_systm.h> 83 #include <netinet/in.h> 84 #include <netinet/ip.h> 85 #include <netinet/ip_icmp.h> 86 #include <netinet/ip_var.h> 87 #include <arpa/inet.h> 88 #include <ctype.h> 89 #include <netdb.h> 90 91 #ifdef IPSEC 92 #include <netipsec/ipsec.h> 93 #endif /*IPSEC*/ 94 95 #include "prog_ops.h" 96 97 #define FLOOD_INTVL 0.01 /* default flood output interval */ 98 #define MAXPACKET (IP_MAXPACKET-60-8) /* max packet size */ 99 100 #define F_VERBOSE 0x0001 101 #define F_QUIET 0x0002 /* minimize all output */ 102 #define F_SEMI_QUIET 0x0004 /* ignore our ICMP errors */ 103 #define F_FLOOD 0x0008 /* flood-ping */ 104 #define F_RECORD_ROUTE 0x0010 /* record route */ 105 #define F_SOURCE_ROUTE 0x0020 /* loose source route */ 106 #define F_PING_FILLED 0x0040 /* is buffer filled with user data? */ 107 #define F_PING_RANDOM 0x0080 /* use random data */ 108 #define F_NUMERIC 0x0100 /* do not do gethostbyaddr() calls */ 109 #define F_TIMING 0x0200 /* room for a timestamp */ 110 #define F_DF 0x0400 /* set IP DF bit */ 111 #define F_SOURCE_ADDR 0x0800 /* set source IP address/interface */ 112 #define F_ONCE 0x1000 /* exit(0) after receiving 1 reply */ 113 #define F_MCAST 0x2000 /* multicast target */ 114 #define F_MCAST_NOLOOP 0x4000 /* no multicast loopback */ 115 #define F_AUDIBLE 0x8000 /* audible output */ 116 #define F_TIMING64 0x10000 /* 64 bit time, nanoseconds */ 117 #ifdef IPSEC 118 #ifdef IPSEC_POLICY_IPSEC 119 #define F_POLICY 0x20000 120 #else 121 #define F_AUTHHDR 0x20000 122 #define F_ENCRYPT 0x40000 123 #endif /*IPSEC_POLICY_IPSEC*/ 124 #endif /*IPSEC*/ 125 126 127 /* MAX_DUP_CHK is the number of bits in received table, the 128 * maximum number of received sequence numbers we can track to check 129 * for duplicates. 130 */ 131 #define MAX_DUP_CHK (8 * 2048) 132 static u_char rcvd_tbl[MAX_DUP_CHK/8]; 133 static int nrepeats = 0; 134 #define A(seq) rcvd_tbl[(seq/8)%sizeof(rcvd_tbl)] /* byte in array */ 135 #define B(seq) (1 << (seq & 0x07)) /* bit in byte */ 136 #define SET(seq) (A(seq) |= B(seq)) 137 #define CLR(seq) (A(seq) &= (~B(seq))) 138 #define TST(seq) (A(seq) & B(seq)) 139 140 struct tv32 { 141 int32_t tv32_sec; 142 int32_t tv32_usec; 143 }; 144 145 146 static u_char *packet; 147 static int packlen; 148 static int pingflags = 0, options; 149 static int pongflags = 0; 150 static char *fill_pat; 151 152 static int s; /* Socket file descriptor */ 153 static int sloop; /* Socket file descriptor/loopback */ 154 155 #define PHDR_LEN sizeof(struct tv32) /* size of timestamp header */ 156 #define PHDR64_LEN sizeof(struct timespec) /* size of timestamp header */ 157 static struct sockaddr_in whereto, send_addr; /* Who to ping */ 158 static struct sockaddr_in src_addr; /* from where */ 159 static struct sockaddr_in loc_addr; /* 127.1 */ 160 static int datalen; /* How much data */ 161 static int phdrlen; 162 163 static sigset_t blockmask, enablemask; /* signal masks */ 164 165 #ifndef __NetBSD__ 166 static char *progname; 167 #define getprogname() (progname) 168 #define setprogname(name) ((void)(progname = (name))) 169 #endif 170 171 static char hostname[MAXHOSTNAMELEN]; 172 173 static struct { 174 struct ip o_ip; 175 char o_opt[MAX_IPOPTLEN]; 176 union { 177 u_char u_buf[MAXPACKET+offsetof(struct icmp, icmp_data)]; 178 struct icmp u_icmp; 179 } o_u; 180 } out_pack; 181 #define opack_icmp out_pack.o_u.u_icmp 182 static struct ip *opack_ip; 183 184 static uint8_t optspace[MAX_IPOPTLEN]; /* record route space */ 185 static int optlen; 186 187 static int npackets; /* total packets to send */ 188 static int preload; /* number of packets to "preload" */ 189 static int ntransmitted; /* output sequence # = #sent */ 190 static int ident; /* our ID, in network byte order */ 191 192 static int nreceived; /* # of packets we got back */ 193 194 static double interval; /* interval between packets */ 195 static struct timespec interval_tv; 196 static double tmin = 999999999.0; 197 static double tmax = 0.0; 198 static double tsum = 0.0; /* sum of all times */ 199 static double tsumsq = 0.0; 200 static double maxwait = 0.0; 201 202 static int bufspace = IP_MAXPACKET; 203 204 static struct timespec now, clear_cache, last_tx, next_tx, first_tx; 205 static struct timespec last_rx, first_rx; 206 static int lastrcvd = 1; /* last ping sent has been received */ 207 208 static struct timespec jiggle_time; 209 static int jiggle_cnt, total_jiggled, jiggle_direction = -1; 210 211 __dead static void doit(void); 212 static void prefinish(int); 213 static void prtsig(int); 214 __dead static void finish(int); 215 static void blocksignals(void); 216 static void enablesignals(void); 217 static void summary(int); 218 static void pinger(void); 219 static void fill(void); 220 static void rnd_fill(void); 221 static double diffsec(struct timespec *, struct timespec *); 222 #if 0 223 static void timespecadd(struct timespec *, struct timespec *); 224 #endif 225 static void sec_to_timespec(const double, struct timespec *); 226 static double timespec_to_sec(const struct timespec *); 227 static void pr_pack(u_char *, int, struct sockaddr_in *); 228 static u_int16_t in_cksum(u_int16_t *, u_int); 229 static void pr_saddr(u_char *); 230 static char *pr_addr(struct in_addr *); 231 static void pr_iph(struct icmp *, int); 232 static void pr_retip(struct icmp *, int); 233 static int pr_icmph(struct icmp *, struct sockaddr_in *, int); 234 static void jiggle(int), jiggle_flush(int); 235 static void gethost(const char *, const char *, 236 struct sockaddr_in *, char *, int); 237 __dead static void usage(void); 238 239 int 240 main(int argc, char *argv[]) 241 { 242 int c, i, on = 1, hostind = 0; 243 long l; 244 int len = -1, compat = 0; 245 u_char ttl = 0; 246 u_long tos = 0; 247 char *p; 248 #ifdef IPSEC 249 #ifdef IPSEC_POLICY_IPSEC 250 char *policy_in = NULL; 251 char *policy_out = NULL; 252 #endif 253 #endif 254 #ifdef SIGINFO 255 struct sigaction sa; 256 #endif 257 258 if (prog_init && prog_init() == -1) 259 err(EXIT_FAILURE, "init failed"); 260 261 if ((s = prog_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 262 err(EXIT_FAILURE, "Cannot create socket"); 263 if ((sloop = prog_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 264 err(EXIT_FAILURE, "Cannot create socket"); 265 266 /* 267 * sloop is never read on. This prevents packets from 268 * queueing in its recv buffer. 269 */ 270 if (prog_shutdown(sloop, SHUT_RD) == -1) 271 warn("Cannot shutdown for read"); 272 273 if (prog_setuid(prog_getuid()) == -1) 274 err(EXIT_FAILURE, "setuid"); 275 276 setprogname(argv[0]); 277 278 #ifndef IPSEC 279 #define IPSECOPT 280 #else 281 #ifdef IPSEC_POLICY_IPSEC 282 #define IPSECOPT "E:" 283 #else 284 #define IPSECOPT "AE" 285 #endif /*IPSEC_POLICY_IPSEC*/ 286 #endif 287 while ((c = getopt(argc, argv, 288 "ac:CdDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 289 #undef IPSECOPT 290 switch (c) { 291 case 'a': 292 pingflags |= F_AUDIBLE; 293 break; 294 case 'C': 295 compat = 1; 296 break; 297 case 'c': 298 l = strtol(optarg, &p, 0); 299 if (*p != '\0' || l <= 0) 300 errx(EXIT_FAILURE, 301 "Bad/invalid number of packets: %s", 302 optarg); 303 #if INT_MAX < LONG_MAX 304 if (l > INT_MAX) 305 errx(EXIT_FAILURE, 306 "Too many packets to count: %ld", l); 307 #endif 308 npackets = l; 309 break; 310 case 'D': 311 pingflags |= F_DF; 312 break; 313 case 'd': 314 options |= SO_DEBUG; 315 break; 316 case 'f': 317 pingflags |= F_FLOOD; 318 break; 319 case 'h': 320 hostind = optind-1; 321 break; 322 case 'i': /* wait between sending packets */ 323 interval = strtod(optarg, &p); 324 if (*p != '\0' || interval <= 0) 325 errx(EXIT_FAILURE, "Bad/invalid interval: %s", 326 optarg); 327 /* 328 * In order to avoid overflowing the microseconds 329 * argument of poll() the interval must be less than 330 * INT_MAX/1000. Limit it to one second less than 331 * that to be safe. 332 */ 333 if (interval >= INT_MAX/1000.0 - 1.0) 334 errx(EXIT_FAILURE, 335 "Timing interval %g too large", interval); 336 break; 337 case 'l': 338 l = strtol(optarg, &p, 0); 339 if (*p != '\0' || l < 0) 340 errx(EXIT_FAILURE, "Bad/invalid preload value: " 341 "%s", optarg); 342 #if INT_MAX < LONG_MAX 343 if (l > INT_MAX) 344 errx(EXIT_FAILURE, 345 "Too many preload packets: %ld", l); 346 #endif 347 preload = l; 348 break; 349 case 'n': 350 pingflags |= F_NUMERIC; 351 break; 352 case 'o': 353 pingflags |= F_ONCE; 354 break; 355 case 'p': /* fill buffer with user pattern */ 356 if (pingflags & F_PING_RANDOM) 357 errx(EXIT_FAILURE, 358 "Only one of -P and -p allowed"); 359 pingflags |= F_PING_FILLED; 360 fill_pat = optarg; 361 break; 362 case 'P': 363 if (pingflags & F_PING_FILLED) 364 errx(EXIT_FAILURE, 365 "Only one of -P and -p allowed"); 366 pingflags |= F_PING_RANDOM; 367 break; 368 case 'q': 369 pingflags |= F_QUIET; 370 break; 371 case 'Q': 372 pingflags |= F_SEMI_QUIET; 373 break; 374 case 'r': 375 options |= SO_DONTROUTE; 376 break; 377 case 's': /* size of packet to send */ 378 l = strtol(optarg, &p, 0); 379 if (*p != '\0' || l < 0) 380 errx(EXIT_FAILURE, 381 "Bad/invalid packet size: %s", optarg); 382 if (l > MAXPACKET) 383 errx(EXIT_FAILURE, "packet size is too large"); 384 len = (int)l; 385 break; 386 case 'v': 387 pingflags |= F_VERBOSE; 388 break; 389 case 'R': 390 pingflags |= F_RECORD_ROUTE; 391 break; 392 case 'L': 393 pingflags |= F_MCAST_NOLOOP; 394 break; 395 case 't': 396 tos = strtoul(optarg, &p, 0); 397 if (*p != '\0' || tos > 0xFF) 398 errx(EXIT_FAILURE, "bad tos value: %s", optarg); 399 break; 400 case 'T': 401 l = strtol(optarg, &p, 0); 402 if (*p != '\0' || l > 255 || l <= 0) 403 errx(EXIT_FAILURE, "ttl out of range: %s", 404 optarg); 405 ttl = (u_char)l; /* cannot check >255 otherwise */ 406 break; 407 case 'I': 408 pingflags |= F_SOURCE_ADDR; 409 gethost("-I", optarg, &src_addr, 0, 0); 410 break; 411 case 'g': 412 pingflags |= F_SOURCE_ROUTE; 413 gethost("-g", optarg, &send_addr, 0, 0); 414 break; 415 case 'w': 416 maxwait = strtod(optarg, &p); 417 if (*p != '\0' || maxwait <= 0) 418 errx(EXIT_FAILURE, "Bad/invalid maxwait time: " 419 "%s", optarg); 420 break; 421 #ifdef IPSEC 422 #ifdef IPSEC_POLICY_IPSEC 423 case 'E': 424 pingflags |= F_POLICY; 425 if (!strncmp("in", optarg, 2)) { 426 policy_in = strdup(optarg); 427 if (!policy_in) 428 err(EXIT_FAILURE, "strdup"); 429 } else if (!strncmp("out", optarg, 3)) { 430 policy_out = strdup(optarg); 431 if (!policy_out) 432 err(EXIT_FAILURE, "strdup"); 433 } else 434 errx(EXIT_FAILURE, "invalid security policy: " 435 "%s", optarg); 436 break; 437 #else 438 case 'A': 439 pingflags |= F_AUTHHDR; 440 break; 441 case 'E': 442 pingflags |= F_ENCRYPT; 443 break; 444 #endif /*IPSEC_POLICY_IPSEC*/ 445 #endif /*IPSEC*/ 446 default: 447 usage(); 448 break; 449 } 450 } 451 452 if (interval == 0) 453 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 454 #ifndef sgi 455 if (pingflags & F_FLOOD && prog_getuid()) 456 errx(EXIT_FAILURE, "Must be superuser to use -f"); 457 if (interval < 1.0 && prog_getuid()) 458 errx(EXIT_FAILURE, "Must be superuser to use < 1 sec " 459 "ping interval"); 460 if (preload > 0 && prog_getuid()) 461 errx(EXIT_FAILURE, "Must be superuser to use -l"); 462 #endif 463 sec_to_timespec(interval, &interval_tv); 464 if (interval_tv.tv_sec == 0 && interval_tv.tv_nsec == 0) { 465 errx(EXIT_FAILURE, "Packet interval must be at least 1 ns"); 466 } 467 468 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 469 warnx("Sorry, no audible output for flood pings"); 470 471 if (npackets != 0) { 472 npackets += preload; 473 } else { 474 npackets = INT_MAX; 475 } 476 477 if (hostind == 0) { 478 if (optind != argc-1) 479 usage(); 480 else 481 hostind = optind; 482 } 483 else if (hostind >= argc - 1) 484 usage(); 485 486 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 487 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 488 pingflags |= F_MCAST; 489 if (!(pingflags & F_SOURCE_ROUTE)) 490 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 491 492 loc_addr.sin_family = AF_INET; 493 loc_addr.sin_len = sizeof(struct sockaddr_in); 494 loc_addr.sin_addr.s_addr = htonl((127 << 24) + 1); 495 496 if (len != -1) 497 datalen = len; 498 else 499 datalen = 64 - PHDR_LEN; 500 if (!compat && datalen >= (int)PHDR64_LEN) { /* can we time them? */ 501 pingflags |= F_TIMING64; 502 phdrlen = PHDR64_LEN; 503 } else if (datalen >= (int)PHDR_LEN) { /* can we time them? */ 504 pingflags |= F_TIMING; 505 phdrlen = PHDR_LEN; 506 } else 507 phdrlen = 0; 508 509 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 510 if ((packet = malloc(packlen)) == NULL) 511 err(EXIT_FAILURE, "Can't allocate %d bytes", packlen); 512 513 if (pingflags & F_PING_FILLED) { 514 fill(); 515 } else if (pingflags & F_PING_RANDOM) { 516 rnd_fill(); 517 } else { 518 for (i = phdrlen; i < datalen; i++) 519 opack_icmp.icmp_data[i] = i; 520 } 521 522 ident = arc4random() & 0xFFFF; 523 524 if (options & SO_DEBUG) { 525 if (prog_setsockopt(s, SOL_SOCKET, SO_DEBUG, 526 (char *)&on, sizeof(on)) == -1) 527 warn("Can't turn on socket debugging"); 528 } 529 if (options & SO_DONTROUTE) { 530 if (prog_setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 531 (char *)&on, sizeof(on)) == -1) 532 warn("SO_DONTROUTE"); 533 } 534 535 if (options & SO_DEBUG) { 536 if (prog_setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 537 (char *)&on, sizeof(on)) == -1) 538 warn("Can't turn on socket debugging"); 539 } 540 if (options & SO_DONTROUTE) { 541 if (prog_setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 542 (char *)&on, sizeof(on)) == -1) 543 warn("SO_DONTROUTE"); 544 } 545 546 if (pingflags & F_SOURCE_ROUTE) { 547 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 548 optspace[IPOPT_OLEN] = optlen = 7; 549 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 550 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 551 sizeof(whereto.sin_addr)); 552 optspace[optlen++] = IPOPT_NOP; 553 } 554 if (pingflags & F_RECORD_ROUTE) { 555 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 556 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 557 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 558 optlen = MAX_IPOPTLEN; 559 } 560 /* this leaves opack_ip 0(mod 4) aligned */ 561 opack_ip = (struct ip *)((char *)&out_pack.o_ip 562 + sizeof(out_pack.o_opt) 563 - optlen); 564 (void) memcpy(opack_ip + 1, optspace, optlen); 565 566 if (prog_setsockopt(s, IPPROTO_IP, IP_HDRINCL, 567 (char *) &on, sizeof(on)) < 0) 568 err(EXIT_FAILURE, "Can't set special IP header"); 569 570 opack_ip->ip_v = IPVERSION; 571 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 572 opack_ip->ip_tos = tos; 573 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 574 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 575 opack_ip->ip_p = IPPROTO_ICMP; 576 opack_ip->ip_src = src_addr.sin_addr; 577 opack_ip->ip_dst = send_addr.sin_addr; 578 579 if (pingflags & F_MCAST) { 580 if (pingflags & F_MCAST_NOLOOP) { 581 u_char loop = 0; 582 if (prog_setsockopt(s, IPPROTO_IP, 583 IP_MULTICAST_LOOP, 584 (char *) &loop, 1) < 0) 585 err(EXIT_FAILURE, "Can't disable multicast loopback"); 586 } 587 588 if (ttl != 0 589 && prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 590 (char *) &ttl, 1) < 0) 591 err(EXIT_FAILURE, "Can't set multicast time-to-live"); 592 593 if ((pingflags & F_SOURCE_ADDR) 594 && prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 595 (char *) &src_addr.sin_addr, 596 sizeof(src_addr.sin_addr)) < 0) 597 err(EXIT_FAILURE, "Can't set multicast source interface"); 598 599 } else if (pingflags & F_SOURCE_ADDR) { 600 if (prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 601 (char *) &src_addr.sin_addr, 602 sizeof(src_addr.sin_addr)) < 0) 603 err(EXIT_FAILURE, "Can't set source interface/address"); 604 } 605 #ifdef IPSEC 606 #ifdef IPSEC_POLICY_IPSEC 607 { 608 char *buf; 609 if (pingflags & F_POLICY) { 610 if (policy_in != NULL) { 611 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 612 if (buf == NULL) 613 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 614 if (prog_setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 615 buf, ipsec_get_policylen(buf)) < 0) { 616 err(EXIT_FAILURE, "ipsec policy cannot be " 617 "configured"); 618 } 619 free(buf); 620 } 621 if (policy_out != NULL) { 622 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 623 if (buf == NULL) 624 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 625 if (prog_setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 626 buf, ipsec_get_policylen(buf)) < 0) { 627 err(EXIT_FAILURE, "ipsec policy cannot be " 628 "configured"); 629 } 630 free(buf); 631 } 632 } 633 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 634 if (buf == NULL) 635 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 636 if (prog_setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 637 buf, ipsec_get_policylen(buf)) < 0) { 638 #if 0 639 warnx("ipsec is not configured"); 640 #else 641 /* ignore it, should be okay */ 642 #endif 643 } 644 free(buf); 645 } 646 #else 647 { 648 int optval; 649 if (pingflags & F_AUTHHDR) { 650 optval = IPSEC_LEVEL_REQUIRE; 651 #ifdef IP_AUTH_TRANS_LEVEL 652 (void)prog_setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 653 (char *)&optval, sizeof(optval)); 654 #else 655 (void)prog_setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 656 (char *)&optval, sizeof(optval)); 657 #endif 658 } 659 if (pingflags & F_ENCRYPT) { 660 optval = IPSEC_LEVEL_REQUIRE; 661 (void)prog_setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 662 (char *)&optval, sizeof(optval)); 663 } 664 optval = IPSEC_LEVEL_BYPASS; 665 #ifdef IP_AUTH_TRANS_LEVEL 666 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 667 (char *)&optval, sizeof(optval)); 668 #else 669 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 670 (char *)&optval, sizeof(optval)); 671 #endif 672 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 673 (char *)&optval, sizeof(optval)); 674 } 675 #endif /*IPSEC_POLICY_IPSEC*/ 676 #endif /*IPSEC*/ 677 678 (void)printf("PING %s (%s): %d data bytes\n", hostname, 679 inet_ntoa(whereto.sin_addr), datalen); 680 681 /* When pinging the broadcast address, you can get a lot 682 * of answers. Doing something so evil is useful if you 683 * are trying to stress the ethernet, or just want to 684 * fill the arp cache to get some stuff for /etc/ethers. 685 */ 686 while (0 > prog_setsockopt(s, SOL_SOCKET, SO_RCVBUF, 687 (char*)&bufspace, sizeof(bufspace))) { 688 if ((bufspace -= 4096) <= 0) 689 err(EXIT_FAILURE, "Cannot set the receive buffer size"); 690 } 691 692 /* make it possible to send giant probes, but do not worry now 693 * if it fails, since we probably won't send giant probes. 694 */ 695 (void)prog_setsockopt(s, SOL_SOCKET, SO_SNDBUF, 696 (char*)&bufspace, sizeof(bufspace)); 697 698 (void)signal(SIGINT, prefinish); 699 700 /* 701 * Set up two signal masks: 702 * - blockmask blocks the signals we catch 703 * - enablemask does not 704 */ 705 706 sigemptyset(&enablemask); 707 sigemptyset(&blockmask); 708 sigaddset(&blockmask, SIGINT); 709 #ifdef SIGINFO 710 sigaddset(&blockmask, SIGINFO); 711 #else 712 sigaddset(&blockmask, SIGQUIT); 713 #endif 714 715 #ifdef SIGINFO 716 sa.sa_handler = prtsig; 717 sa.sa_flags = SA_NOKERNINFO; 718 sigemptyset(&sa.sa_mask); 719 (void)sigaction(SIGINFO, &sa, NULL); 720 #else 721 (void)signal(SIGQUIT, prtsig); 722 #endif 723 (void)signal(SIGCONT, prtsig); 724 725 blocksignals(); 726 727 /* fire off them quickies */ 728 for (i = 0; i < preload; i++) { 729 clock_gettime(CLOCK_MONOTONIC, &now); 730 pinger(); 731 } 732 733 doit(); 734 return 0; 735 } 736 737 static void 738 doit(void) 739 { 740 int cc; 741 struct sockaddr_in from; 742 socklen_t fromlen; 743 double sec, last, d_last; 744 struct pollfd fdmaskp[1]; 745 746 (void)clock_gettime(CLOCK_MONOTONIC, &clear_cache); 747 if (maxwait != 0) { 748 last = timespec_to_sec(&clear_cache) + maxwait; 749 d_last = 0; 750 } else { 751 last = 0; 752 d_last = 365*24*60*60; 753 } 754 755 do { 756 clock_gettime(CLOCK_MONOTONIC, &now); 757 758 if (last != 0) 759 d_last = last - timespec_to_sec(&now); 760 761 if (ntransmitted < npackets && d_last > 0) { 762 /* send if within 100 usec or late for next packet */ 763 sec = diffsec(&next_tx, &now); 764 if (sec <= 0.0001 || 765 (lastrcvd && (pingflags & F_FLOOD))) { 766 pinger(); 767 sec = diffsec(&next_tx, &now); 768 } 769 if (sec < 0.0) 770 sec = 0.0; 771 if (d_last < sec) 772 sec = d_last; 773 774 } else { 775 /* For the last response, wait twice as long as the 776 * worst case seen, or 10 times as long as the 777 * maximum interpacket interval, whichever is longer. 778 */ 779 sec = MAX(2 * tmax, 10 * interval) - 780 diffsec(&now, &last_tx); 781 if (d_last < sec) 782 sec = d_last; 783 if (sec <= 0) 784 break; 785 } 786 787 788 fdmaskp[0].fd = s; 789 fdmaskp[0].events = POLLIN; 790 791 enablesignals(); 792 cc = prog_poll(fdmaskp, 1, (int)(sec * 1000)); 793 blocksignals(); 794 795 if (cc <= 0) { 796 if (cc < 0) { 797 if (errno == EINTR) 798 continue; 799 jiggle_flush(1); 800 err(EXIT_FAILURE, "poll"); 801 } 802 continue; 803 } 804 805 fromlen = sizeof(from); 806 cc = prog_recvfrom(s, (char *) packet, packlen, 807 0, (struct sockaddr *)&from, 808 &fromlen); 809 if (cc < 0) { 810 if (errno != EINTR) { 811 jiggle_flush(1); 812 warn("recvfrom"); 813 (void)fflush(stderr); 814 } 815 continue; 816 } 817 clock_gettime(CLOCK_MONOTONIC, &now); 818 pr_pack(packet, cc, &from); 819 820 } while (nreceived < npackets 821 && (nreceived == 0 || !(pingflags & F_ONCE))); 822 823 finish(0); 824 } 825 826 827 static void 828 jiggle_flush(int nl) /* new line if there are dots */ 829 { 830 int serrno = errno; 831 832 if (jiggle_cnt > 0) { 833 total_jiggled += jiggle_cnt; 834 jiggle_direction = 1; 835 do { 836 (void)putchar('.'); 837 } while (--jiggle_cnt > 0); 838 839 } else if (jiggle_cnt < 0) { 840 total_jiggled -= jiggle_cnt; 841 jiggle_direction = -1; 842 do { 843 (void)putchar('\b'); 844 } while (++jiggle_cnt < 0); 845 } 846 847 if (nl) { 848 if (total_jiggled != 0) 849 (void)putchar('\n'); 850 total_jiggled = 0; 851 jiggle_direction = -1; 852 } 853 854 (void)fflush(stdout); 855 (void)fflush(stderr); 856 jiggle_time = now; 857 errno = serrno; 858 } 859 860 861 /* jiggle the cursor for flood-ping 862 */ 863 static void 864 jiggle(int delta) 865 { 866 double dt; 867 868 if (pingflags & F_QUIET) 869 return; 870 871 /* do not back up into messages */ 872 if (total_jiggled+jiggle_cnt+delta < 0) 873 return; 874 875 jiggle_cnt += delta; 876 877 /* flush the FLOOD dots when things are quiet 878 * or occassionally to make the cursor jiggle. 879 */ 880 dt = diffsec(&last_tx, &jiggle_time); 881 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 882 jiggle_flush(0); 883 } 884 885 886 /* 887 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 888 * will be added on by the kernel. The ID field is our UNIX process ID, 889 * and the sequence number is an ascending integer. The first phdrlen bytes 890 * of the data portion are used to hold a UNIX "timeval" struct in VAX 891 * byte-order, to compute the round-trip time, or a UNIX "timespec" in native 892 * format. 893 */ 894 static void 895 pinger(void) 896 { 897 struct tv32 tv32; 898 int i, cc, sw; 899 double waittime; 900 long numskip; 901 902 opack_icmp.icmp_code = 0; 903 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 904 905 /* clear the cached route in the kernel after an ICMP 906 * response such as a Redirect is seen to stop causing 907 * more such packets. Also clear the cached route 908 * periodically in case of routing changes that make 909 * black holes come and go. 910 */ 911 if (clear_cache.tv_sec != now.tv_sec) { 912 opack_icmp.icmp_type = ICMP_ECHOREPLY; 913 opack_icmp.icmp_id = ~ident; 914 opack_icmp.icmp_cksum = 0; 915 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 916 phdrlen); 917 sw = 0; 918 if (prog_setsockopt(sloop, IPPROTO_IP, IP_HDRINCL, 919 (char *)&sw, sizeof(sw)) < 0) 920 err(EXIT_FAILURE, "Can't turn off special IP header"); 921 if (prog_sendto(sloop, (char *) &opack_icmp, 922 ICMP_MINLEN, MSG_DONTROUTE, 923 (struct sockaddr *)&loc_addr, 924 sizeof(struct sockaddr_in)) < 0) { 925 /* 926 * XXX: we only report this as a warning in verbose 927 * mode because people get confused when they see 928 * this error when they are running in single user 929 * mode and they have not configured lo0 930 */ 931 if (pingflags & F_VERBOSE) 932 warn("failed to clear cached route"); 933 } 934 sw = 1; 935 if (prog_setsockopt(sloop, IPPROTO_IP, IP_HDRINCL, 936 (char *)&sw, sizeof(sw)) < 0) 937 err(EXIT_FAILURE, "Can't set special IP header"); 938 939 (void)clock_gettime(CLOCK_MONOTONIC, &clear_cache); 940 } 941 942 opack_icmp.icmp_type = ICMP_ECHO; 943 opack_icmp.icmp_id = ident; 944 945 if (pingflags & F_TIMING) { 946 tv32.tv32_sec = (uint32_t)htonl(now.tv_sec); 947 tv32.tv32_usec = htonl(now.tv_nsec / 1000); 948 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 949 } else if (pingflags & F_TIMING64) 950 (void) memcpy(&opack_icmp.icmp_data[0], &now, sizeof(now)); 951 952 cc = MAX(datalen, ICMP_MINLEN) + PHDR_LEN; 953 opack_icmp.icmp_cksum = 0; 954 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 955 956 cc += opack_ip->ip_hl<<2; 957 opack_ip->ip_len = cc; 958 i = prog_sendto(s, (char *) opack_ip, cc, 0, 959 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 960 if (i != cc) { 961 jiggle_flush(1); 962 if (i < 0) 963 warn("sendto"); 964 else 965 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 966 (void)fflush(stderr); 967 } 968 lastrcvd = 0; 969 970 CLR(ntransmitted); 971 ntransmitted++; 972 973 last_tx = now; 974 if (next_tx.tv_sec == 0) { 975 first_tx = now; 976 next_tx = now; 977 } 978 979 /* Transmit regularly, at always the same microsecond in the 980 * second when going at one packet per second. 981 * If we are at most 100 ms behind, send extras to get caught up. 982 * Otherwise, skip packets we were too slow to send. 983 */ 984 waittime = diffsec(&next_tx, &now); 985 if (waittime < -1.0) { 986 /* very behind - forget about being precise */ 987 next_tx.tv_sec += (int)(-waittime); 988 } else if (waittime < -0.1) { 989 /* behind - skip a few */ 990 if (interval_tv.tv_sec == 0) { 991 numskip = (long)(-waittime / interval_tv.tv_nsec); 992 next_tx.tv_nsec += numskip * interval_tv.tv_nsec; 993 /* 994 * We can add at most one second's worth, but allow 995 * for tv_nsec reaching 2 billion just in case FP 996 * issues strike. 997 */ 998 while (next_tx.tv_nsec >= 1000000000) { 999 next_tx.tv_sec++; 1000 next_tx.tv_nsec -= 1000000000; 1001 } 1002 } else { 1003 do { 1004 timespecadd(&next_tx, &interval_tv, &next_tx); 1005 } while (diffsec(&next_tx, &now) < -0.1); 1006 } 1007 1008 } else if (waittime <= interval) { 1009 timespecadd(&next_tx, &interval_tv, &next_tx); 1010 } 1011 1012 if (pingflags & F_FLOOD) 1013 jiggle(1); 1014 1015 /* While the packet is going out, ready buffer for the next 1016 * packet. Use a fast but not very good random number generator. 1017 */ 1018 if (pingflags & F_PING_RANDOM) 1019 rnd_fill(); 1020 } 1021 1022 1023 static void 1024 pr_pack_sub(int cc, 1025 char *addr, 1026 int seqno, 1027 int dupflag, 1028 int ttl, 1029 double triptime) 1030 { 1031 jiggle_flush(1); 1032 1033 if (pingflags & F_FLOOD) 1034 return; 1035 1036 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 1037 if (dupflag) 1038 (void)printf(" DUP!"); 1039 (void)printf(" ttl=%d", ttl); 1040 if (pingflags & (F_TIMING|F_TIMING64)) { 1041 const unsigned int prec = (pingflags & F_TIMING64) != 0 ? 6 : 3; 1042 1043 (void)printf(" time=%.*f ms", prec, triptime*1000.0); 1044 } 1045 1046 /* 1047 * Send beep to stderr, since that's more likely than stdout 1048 * to go to a terminal.. 1049 */ 1050 if (pingflags & F_AUDIBLE && !dupflag) 1051 (void)fprintf(stderr,"\a"); 1052 } 1053 1054 1055 /* 1056 * Print out the packet, if it came from us. This logic is necessary 1057 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1058 * which arrive ('tis only fair). This permits multiple copies of this 1059 * program to be run without having intermingled output (or statistics!). 1060 */ 1061 static void 1062 pr_pack(u_char *buf, 1063 int tot_len, 1064 struct sockaddr_in *from) 1065 { 1066 struct ip *ip; 1067 struct icmp *icp; 1068 int i, j, net_len; 1069 u_char *cp; 1070 static int old_rrlen; 1071 static char old_rr[MAX_IPOPTLEN]; 1072 int hlen, dupflag = 0, dumped; 1073 double triptime = 0.0; 1074 #define PR_PACK_SUB() {if (!dumped) { \ 1075 dumped = 1; \ 1076 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 1077 ntohs((u_int16_t)icp->icmp_seq), \ 1078 dupflag, ip->ip_ttl, triptime);}} 1079 1080 /* Check the IP header */ 1081 ip = (struct ip *) buf; 1082 hlen = ip->ip_hl << 2; 1083 if (tot_len < hlen + ICMP_MINLEN) { 1084 if (pingflags & F_VERBOSE) { 1085 jiggle_flush(1); 1086 (void)printf("packet too short (%d bytes) from %s\n", 1087 tot_len, inet_ntoa(from->sin_addr)); 1088 } 1089 return; 1090 } 1091 1092 /* Now the ICMP part */ 1093 dumped = 0; 1094 net_len = tot_len - hlen; 1095 icp = (struct icmp *)(buf + hlen); 1096 if (icp->icmp_type == ICMP_ECHOREPLY 1097 && icp->icmp_id == ident) { 1098 1099 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 1100 lastrcvd = 1; 1101 last_rx = now; 1102 if (first_rx.tv_sec == 0) 1103 first_rx = last_rx; 1104 nreceived++; 1105 if (pingflags & (F_TIMING|F_TIMING64)) { 1106 struct timespec tv; 1107 1108 if (pingflags & F_TIMING) { 1109 struct tv32 tv32; 1110 1111 (void)memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 1112 tv.tv_sec = (uint32_t)ntohl(tv32.tv32_sec); 1113 tv.tv_nsec = ntohl(tv32.tv32_usec) * 1000; 1114 } else if (pingflags & F_TIMING64) 1115 (void)memcpy(&tv, icp->icmp_data, sizeof(tv)); 1116 else 1117 memset(&tv, 0, sizeof(tv)); /* XXX: gcc */ 1118 1119 triptime = diffsec(&last_rx, &tv); 1120 tsum += triptime; 1121 tsumsq += triptime * triptime; 1122 if (triptime < tmin) 1123 tmin = triptime; 1124 if (triptime > tmax) 1125 tmax = triptime; 1126 } 1127 1128 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1129 nrepeats++, nreceived--; 1130 dupflag=1; 1131 } else { 1132 SET(ntohs((u_int16_t)icp->icmp_seq)); 1133 } 1134 1135 if (tot_len != opack_ip->ip_len) { 1136 PR_PACK_SUB(); 1137 switch (opack_ip->ip_len - tot_len) { 1138 case MAX_IPOPTLEN: 1139 if ((pongflags & F_RECORD_ROUTE) != 0) 1140 break; 1141 if ((pingflags & F_RECORD_ROUTE) == 0) 1142 goto out; 1143 pongflags |= F_RECORD_ROUTE; 1144 (void)printf("\nremote host does not " 1145 "support record route"); 1146 break; 1147 case 8: 1148 if ((pongflags & F_SOURCE_ROUTE) != 0) 1149 break; 1150 if ((pingflags & F_SOURCE_ROUTE) == 0) 1151 goto out; 1152 pongflags |= F_SOURCE_ROUTE; 1153 (void)printf("\nremote host does not " 1154 "support source route"); 1155 break; 1156 default: 1157 out: 1158 (void)printf("\nwrong total length %d " 1159 "instead of %d", tot_len, opack_ip->ip_len); 1160 break; 1161 } 1162 } 1163 1164 if (!dupflag) { 1165 static u_int16_t last_seqno = 0xffff; 1166 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1167 u_int16_t gap = seqno - (last_seqno + 1); 1168 if (gap > 0 && gap < 0x8000 && 1169 (pingflags & F_VERBOSE)) { 1170 (void)printf("[*** sequence gap of %u " 1171 "packets from %u ... %u ***]\n", gap, 1172 (u_int16_t) (last_seqno + 1), 1173 (u_int16_t) (seqno - 1)); 1174 if (pingflags & F_QUIET) 1175 summary(0); 1176 } 1177 1178 if (gap < 0x8000) 1179 last_seqno = seqno; 1180 } 1181 1182 if (pingflags & F_QUIET) 1183 return; 1184 1185 if (!(pingflags & F_FLOOD)) 1186 PR_PACK_SUB(); 1187 1188 /* check the data */ 1189 if ((size_t)(tot_len - hlen) > 1190 offsetof(struct icmp, icmp_data) + datalen 1191 && !(pingflags & F_PING_RANDOM) 1192 && memcmp(icp->icmp_data + phdrlen, 1193 opack_icmp.icmp_data + phdrlen, 1194 datalen - phdrlen)) { 1195 for (i = phdrlen; i < datalen; i++) { 1196 if (icp->icmp_data[i] != 1197 opack_icmp.icmp_data[i]) 1198 break; 1199 } 1200 PR_PACK_SUB(); 1201 (void)printf("\nwrong data byte #%d should have been" 1202 " %#x but was %#x", i - phdrlen, 1203 (u_char)opack_icmp.icmp_data[i], 1204 (u_char)icp->icmp_data[i]); 1205 for (i = phdrlen; i < datalen; i++) { 1206 if ((i % 16) == 0) 1207 (void)printf("\n\t"); 1208 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1209 } 1210 } 1211 1212 } else { 1213 if (!pr_icmph(icp, from, net_len)) 1214 return; 1215 dumped = 2; 1216 } 1217 1218 /* Display any IP options */ 1219 cp = buf + sizeof(struct ip); 1220 while (hlen > (int)sizeof(struct ip)) { 1221 switch (*cp) { 1222 case IPOPT_EOL: 1223 hlen = 0; 1224 break; 1225 case IPOPT_LSRR: 1226 hlen -= 2; 1227 j = *++cp; 1228 ++cp; 1229 j -= IPOPT_MINOFF; 1230 if (j <= 0) 1231 continue; 1232 if (dumped <= 1) { 1233 j = ((j+3)/4)*4; 1234 hlen -= j; 1235 cp += j; 1236 break; 1237 } 1238 PR_PACK_SUB(); 1239 (void)printf("\nLSRR: "); 1240 for (;;) { 1241 pr_saddr(cp); 1242 cp += 4; 1243 hlen -= 4; 1244 j -= 4; 1245 if (j <= 0) 1246 break; 1247 (void)putchar('\n'); 1248 } 1249 break; 1250 case IPOPT_RR: 1251 j = *++cp; /* get length */ 1252 i = *++cp; /* and pointer */ 1253 hlen -= 2; 1254 if (i > j) 1255 i = j; 1256 i -= IPOPT_MINOFF; 1257 if (i <= 0) 1258 continue; 1259 if (dumped <= 1) { 1260 if (i == old_rrlen 1261 && !memcmp(cp, old_rr, i)) { 1262 if (dumped) 1263 (void)printf("\t(same route)"); 1264 j = ((i+3)/4)*4; 1265 hlen -= j; 1266 cp += j; 1267 break; 1268 } 1269 old_rrlen = i; 1270 (void) memcpy(old_rr, cp, i); 1271 } 1272 if (!dumped) { 1273 jiggle_flush(1); 1274 (void)printf("RR: "); 1275 dumped = 1; 1276 } else { 1277 (void)printf("\nRR: "); 1278 } 1279 for (;;) { 1280 pr_saddr(cp); 1281 cp += 4; 1282 hlen -= 4; 1283 i -= 4; 1284 if (i <= 0) 1285 break; 1286 (void)putchar('\n'); 1287 } 1288 break; 1289 case IPOPT_NOP: 1290 if (dumped <= 1) 1291 break; 1292 PR_PACK_SUB(); 1293 (void)printf("\nNOP"); 1294 break; 1295 #ifdef sgi 1296 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1297 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1298 case IPOPT_CIPSO: /* Commercial IPSO */ 1299 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1300 i = (unsigned)cp[1]; 1301 hlen -= i - 1; 1302 PR_PACK_SUB(); 1303 (void)printf("\nSEC:"); 1304 while (i--) { 1305 (void)printf(" %02x", *cp++); 1306 } 1307 cp--; 1308 break; 1309 } 1310 #endif 1311 default: 1312 PR_PACK_SUB(); 1313 (void)printf("\nunknown option 0x%x", *cp); 1314 break; 1315 } 1316 hlen--; 1317 cp++; 1318 } 1319 1320 if (dumped) { 1321 (void)putchar('\n'); 1322 (void)fflush(stdout); 1323 } else { 1324 jiggle(-1); 1325 } 1326 } 1327 1328 1329 /* Compute the IP checksum 1330 * This assumes the packet is less than 32K long. 1331 */ 1332 static u_int16_t 1333 in_cksum(u_int16_t *p, u_int len) 1334 { 1335 u_int32_t sum = 0; 1336 int nwords = len >> 1; 1337 1338 while (nwords-- != 0) 1339 sum += *p++; 1340 1341 if (len & 1) { 1342 union { 1343 u_int16_t w; 1344 u_int8_t c[2]; 1345 } u; 1346 u.c[0] = *(u_char *)p; 1347 u.c[1] = 0; 1348 sum += u.w; 1349 } 1350 1351 /* end-around-carry */ 1352 sum = (sum >> 16) + (sum & 0xffff); 1353 sum += (sum >> 16); 1354 return (~sum); 1355 } 1356 1357 1358 /* 1359 * compute the difference of two timespecs in seconds 1360 */ 1361 static double 1362 diffsec(struct timespec *timenow, 1363 struct timespec *then) 1364 { 1365 if (timenow->tv_sec == 0) 1366 return -1; 1367 return (timenow->tv_sec - then->tv_sec) 1368 * 1.0 + (timenow->tv_nsec - then->tv_nsec) / 1000000000.0; 1369 } 1370 1371 1372 #if 0 1373 static void 1374 timespecadd(struct timespec *t1, 1375 struct timespec *t2) 1376 { 1377 1378 t1->tv_sec += t2->tv_sec; 1379 if ((t1->tv_nsec += t2->tv_nsec) >= 1000000000) { 1380 t1->tv_sec++; 1381 t1->tv_nsec -= 1000000000; 1382 } 1383 } 1384 #endif 1385 1386 1387 static void 1388 sec_to_timespec(const double sec, struct timespec *tp) 1389 { 1390 tp->tv_sec = sec; 1391 tp->tv_nsec = (sec - tp->tv_sec) * 1000000000.0; 1392 } 1393 1394 1395 static double 1396 timespec_to_sec(const struct timespec *tp) 1397 { 1398 return tp->tv_sec + tp->tv_nsec / 1000000000.0; 1399 } 1400 1401 1402 /* 1403 * Print statistics. 1404 * Heavily buffered STDIO is used here, so that all the statistics 1405 * will be written with 1 sys-write call. This is nice when more 1406 * than one copy of the program is running on a terminal; it prevents 1407 * the statistics output from becomming intermingled. 1408 */ 1409 static void 1410 summary(int header) 1411 { 1412 jiggle_flush(1); 1413 1414 if (header) 1415 (void)printf("\n----%s PING Statistics----\n", hostname); 1416 (void)printf("%d packets transmitted, ", ntransmitted); 1417 (void)printf("%d packets received, ", nreceived); 1418 if (nrepeats) 1419 (void)printf("+%d duplicates, ", nrepeats); 1420 if (ntransmitted) { 1421 if (nreceived > ntransmitted) 1422 (void)printf("-- somebody's duplicating packets!"); 1423 else 1424 (void)printf("%.1f%% packet loss", 1425 (((ntransmitted-nreceived)*100.0) / 1426 ntransmitted)); 1427 } 1428 (void)printf("\n"); 1429 if (nreceived && (pingflags & (F_TIMING|F_TIMING64))) { 1430 double n = nreceived + nrepeats; 1431 double avg = (tsum / n); 1432 double variance = 0.0; 1433 const unsigned int prec = (pingflags & F_TIMING64) != 0 ? 6 : 3; 1434 if (n>1) 1435 variance = (tsumsq - n*avg*avg) /(n-1); 1436 1437 (void)printf("round-trip min/avg/max/stddev = " 1438 "%.*f/%.*f/%.*f/%.*f ms\n", 1439 prec, tmin * 1000.0, 1440 prec, avg * 1000.0, 1441 prec, tmax * 1000.0, 1442 prec, sqrt(variance) * 1000.0); 1443 if (pingflags & F_FLOOD) { 1444 double r = diffsec(&last_rx, &first_rx); 1445 double t = diffsec(&last_tx, &first_tx); 1446 if (r == 0) 1447 r = 0.0001; 1448 if (t == 0) 1449 t = 0.0001; 1450 (void)printf(" %.1f packets/sec sent, " 1451 " %.1f packets/sec received\n", 1452 ntransmitted/t, nreceived/r); 1453 } 1454 } 1455 } 1456 1457 1458 /* 1459 * Print statistics when SIGINFO is received. 1460 */ 1461 /* ARGSUSED */ 1462 static void 1463 prtsig(int dummy) 1464 { 1465 1466 summary(0); 1467 #ifndef SIGINFO 1468 (void)signal(SIGQUIT, prtsig); 1469 #endif 1470 } 1471 1472 1473 /* 1474 * On the first SIGINT, allow any outstanding packets to dribble in 1475 */ 1476 static void 1477 prefinish(int sig) 1478 { 1479 if (lastrcvd /* quit now if caught up */ 1480 || nreceived == 0) /* or if remote is dead */ 1481 finish(0); 1482 1483 (void)signal(sig, finish); /* do this only the 1st time */ 1484 1485 if (npackets > ntransmitted) /* let the normal limit work */ 1486 npackets = ntransmitted; 1487 } 1488 1489 /* 1490 * Print statistics and give up. 1491 */ 1492 /* ARGSUSED */ 1493 static void 1494 finish(int dummy) 1495 { 1496 #ifdef SIGINFO 1497 (void)signal(SIGINFO, SIG_DFL); 1498 #else 1499 (void)signal(SIGQUIT, SIG_DFL); 1500 #endif 1501 1502 summary(1); 1503 exit(nreceived > 0 ? 0 : 2); 1504 } 1505 1506 static void 1507 blocksignals(void) 1508 { 1509 if (sigprocmask(SIG_SETMASK, &blockmask, NULL) == -1) { 1510 err(EXIT_FAILURE, "blocksignals: sigprocmask"); 1511 } 1512 } 1513 1514 static void 1515 enablesignals(void) 1516 { 1517 if (sigprocmask(SIG_SETMASK, &enablemask, NULL) == -1) { 1518 err(EXIT_FAILURE, "enablesignals: sigprocmask"); 1519 } 1520 } 1521 1522 1523 static int /* 0=do not print it */ 1524 ck_pr_icmph(struct icmp *icp, 1525 struct sockaddr_in *from, 1526 int cc, 1527 int override) /* 1=override VERBOSE if interesting */ 1528 { 1529 int hlen; 1530 struct ip ipb, *ip = &ipb; 1531 struct icmp icp2b, *icp2 = &icp2b; 1532 int res; 1533 1534 if (pingflags & F_VERBOSE) { 1535 res = 1; 1536 jiggle_flush(1); 1537 } else { 1538 res = 0; 1539 } 1540 1541 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1542 hlen = ip->ip_hl << 2; 1543 if (ip->ip_p == IPPROTO_ICMP 1544 && hlen + 6 <= cc) { 1545 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1546 if (icp2->icmp_id == ident) { 1547 /* remember to clear route cached in kernel 1548 * if this non-Echo-Reply ICMP message was for one 1549 * of our packets. 1550 */ 1551 clear_cache.tv_sec = 0; 1552 1553 if (!res && override 1554 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1555 jiggle_flush(1); 1556 (void)printf("%d bytes from %s: ", 1557 cc, pr_addr(&from->sin_addr)); 1558 res = 1; 1559 } 1560 } 1561 } 1562 1563 return res; 1564 } 1565 1566 1567 /* 1568 * Print a descriptive string about an ICMP header other than an echo reply. 1569 */ 1570 static int /* 0=printed nothing */ 1571 pr_icmph(struct icmp *icp, 1572 struct sockaddr_in *from, 1573 int cc) 1574 { 1575 switch (icp->icmp_type ) { 1576 case ICMP_UNREACH: 1577 if (!ck_pr_icmph(icp, from, cc, 1)) 1578 return 0; 1579 switch (icp->icmp_code) { 1580 case ICMP_UNREACH_NET: 1581 (void)printf("Destination Net Unreachable"); 1582 break; 1583 case ICMP_UNREACH_HOST: 1584 (void)printf("Destination Host Unreachable"); 1585 break; 1586 case ICMP_UNREACH_PROTOCOL: 1587 (void)printf("Destination Protocol Unreachable"); 1588 break; 1589 case ICMP_UNREACH_PORT: 1590 (void)printf("Destination Port Unreachable"); 1591 break; 1592 case ICMP_UNREACH_NEEDFRAG: 1593 (void)printf("frag needed and DF set. Next MTU=%d", 1594 ntohs(icp->icmp_nextmtu)); 1595 break; 1596 case ICMP_UNREACH_SRCFAIL: 1597 (void)printf("Source Route Failed"); 1598 break; 1599 case ICMP_UNREACH_NET_UNKNOWN: 1600 (void)printf("Unreachable unknown net"); 1601 break; 1602 case ICMP_UNREACH_HOST_UNKNOWN: 1603 (void)printf("Unreachable unknown host"); 1604 break; 1605 case ICMP_UNREACH_ISOLATED: 1606 (void)printf("Unreachable host isolated"); 1607 break; 1608 case ICMP_UNREACH_NET_PROHIB: 1609 (void)printf("Net prohibited access"); 1610 break; 1611 case ICMP_UNREACH_HOST_PROHIB: 1612 (void)printf("Host prohibited access"); 1613 break; 1614 case ICMP_UNREACH_TOSNET: 1615 (void)printf("Bad TOS for net"); 1616 break; 1617 case ICMP_UNREACH_TOSHOST: 1618 (void)printf("Bad TOS for host"); 1619 break; 1620 case 13: 1621 (void)printf("Communication prohibited"); 1622 break; 1623 case 14: 1624 (void)printf("Host precedence violation"); 1625 break; 1626 case 15: 1627 (void)printf("Precedence cutoff"); 1628 break; 1629 default: 1630 (void)printf("Bad Destination Unreachable Code: %d", 1631 icp->icmp_code); 1632 break; 1633 } 1634 /* Print returned IP header information */ 1635 pr_retip(icp, cc); 1636 break; 1637 1638 case ICMP_SOURCEQUENCH: 1639 if (!ck_pr_icmph(icp, from, cc, 1)) 1640 return 0; 1641 (void)printf("Source Quench"); 1642 pr_retip(icp, cc); 1643 break; 1644 1645 case ICMP_REDIRECT: 1646 if (!ck_pr_icmph(icp, from, cc, 1)) 1647 return 0; 1648 switch (icp->icmp_code) { 1649 case ICMP_REDIRECT_NET: 1650 (void)printf("Redirect Network"); 1651 break; 1652 case ICMP_REDIRECT_HOST: 1653 (void)printf("Redirect Host"); 1654 break; 1655 case ICMP_REDIRECT_TOSNET: 1656 (void)printf("Redirect Type of Service and Network"); 1657 break; 1658 case ICMP_REDIRECT_TOSHOST: 1659 (void)printf("Redirect Type of Service and Host"); 1660 break; 1661 default: 1662 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1663 break; 1664 } 1665 (void)printf(" New router addr: %s", 1666 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1667 pr_retip(icp, cc); 1668 break; 1669 1670 case ICMP_ECHO: 1671 if (!ck_pr_icmph(icp, from, cc, 0)) 1672 return 0; 1673 (void)printf("Echo Request: ID=%d seq=%d", 1674 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1675 break; 1676 1677 case ICMP_ECHOREPLY: 1678 /* displaying other's pings is too noisey */ 1679 #if 0 1680 if (!ck_pr_icmph(icp, from, cc, 0)) 1681 return 0; 1682 (void)printf("Echo Reply: ID=%d seq=%d", 1683 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1684 break; 1685 #else 1686 return 0; 1687 #endif 1688 1689 case ICMP_ROUTERADVERT: 1690 if (!ck_pr_icmph(icp, from, cc, 0)) 1691 return 0; 1692 (void)printf("Router Discovery Advert"); 1693 break; 1694 1695 case ICMP_ROUTERSOLICIT: 1696 if (!ck_pr_icmph(icp, from, cc, 0)) 1697 return 0; 1698 (void)printf("Router Discovery Solicit"); 1699 break; 1700 1701 case ICMP_TIMXCEED: 1702 if (!ck_pr_icmph(icp, from, cc, 1)) 1703 return 0; 1704 switch (icp->icmp_code ) { 1705 case ICMP_TIMXCEED_INTRANS: 1706 (void)printf("Time To Live exceeded"); 1707 break; 1708 case ICMP_TIMXCEED_REASS: 1709 (void)printf("Frag reassembly time exceeded"); 1710 break; 1711 default: 1712 (void)printf("Time exceeded, Bad Code: %d", 1713 icp->icmp_code); 1714 break; 1715 } 1716 pr_retip(icp, cc); 1717 break; 1718 1719 case ICMP_PARAMPROB: 1720 if (!ck_pr_icmph(icp, from, cc, 1)) 1721 return 0; 1722 (void)printf("Parameter problem: pointer = 0x%02x", 1723 icp->icmp_hun.ih_pptr); 1724 pr_retip(icp, cc); 1725 break; 1726 1727 case ICMP_TSTAMP: 1728 if (!ck_pr_icmph(icp, from, cc, 0)) 1729 return 0; 1730 (void)printf("Timestamp"); 1731 break; 1732 1733 case ICMP_TSTAMPREPLY: 1734 if (!ck_pr_icmph(icp, from, cc, 0)) 1735 return 0; 1736 (void)printf("Timestamp Reply"); 1737 break; 1738 1739 case ICMP_IREQ: 1740 if (!ck_pr_icmph(icp, from, cc, 0)) 1741 return 0; 1742 (void)printf("Information Request"); 1743 break; 1744 1745 case ICMP_IREQREPLY: 1746 if (!ck_pr_icmph(icp, from, cc, 0)) 1747 return 0; 1748 (void)printf("Information Reply"); 1749 break; 1750 1751 case ICMP_MASKREQ: 1752 if (!ck_pr_icmph(icp, from, cc, 0)) 1753 return 0; 1754 (void)printf("Address Mask Request"); 1755 break; 1756 1757 case ICMP_MASKREPLY: 1758 if (!ck_pr_icmph(icp, from, cc, 0)) 1759 return 0; 1760 (void)printf("Address Mask Reply"); 1761 break; 1762 1763 default: 1764 if (!ck_pr_icmph(icp, from, cc, 0)) 1765 return 0; 1766 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1767 if (pingflags & F_VERBOSE) 1768 pr_iph(icp, cc); 1769 } 1770 1771 return 1; 1772 } 1773 1774 1775 /* 1776 * Print an IP header with options. 1777 */ 1778 static void 1779 pr_iph(struct icmp *icp, 1780 int cc) 1781 { 1782 int hlen; 1783 u_char *cp; 1784 struct ip __aligned(4) ipb; 1785 struct ip *ip = &ipb; 1786 1787 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1788 1789 hlen = ip->ip_hl << 2; 1790 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1791 1792 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1793 (void)printf(" %1x %1x %02x %04x %04x", 1794 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1795 (void)printf(" %1x %04x", 1796 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1797 (void)printf(" %02x %02x %04x", 1798 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1799 (void)printf(" %15s ", 1800 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1801 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1802 /* dump any option bytes */ 1803 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1804 (void)printf("%02x", *cp++); 1805 } 1806 } 1807 1808 /* 1809 * Print an ASCII host address starting from a string of bytes. 1810 */ 1811 static void 1812 pr_saddr(u_char *cp) 1813 { 1814 n_long l; 1815 struct in_addr addr; 1816 1817 l = (u_char)*++cp; 1818 l = (l<<8) + (u_char)*++cp; 1819 l = (l<<8) + (u_char)*++cp; 1820 l = (l<<8) + (u_char)*++cp; 1821 addr.s_addr = htonl(l); 1822 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1823 } 1824 1825 1826 /* 1827 * Return an ASCII host address 1828 * as a dotted quad and optionally with a hostname 1829 */ 1830 static char * 1831 pr_addr(struct in_addr *addr) /* in network order */ 1832 { 1833 struct hostent *hp; 1834 static char buf[MAXHOSTNAMELEN+4+16+1]; 1835 1836 if ((pingflags & F_NUMERIC) 1837 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1838 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1839 } else { 1840 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1841 inet_ntoa(*addr)); 1842 } 1843 1844 return buf; 1845 } 1846 1847 /* 1848 * Dump some info on a returned (via ICMP) IP packet. 1849 */ 1850 static void 1851 pr_retip(struct icmp *icp, 1852 int cc) 1853 { 1854 int hlen; 1855 u_char *cp; 1856 struct ip ipb, *ip = &ipb; 1857 1858 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1859 1860 if (pingflags & F_VERBOSE) 1861 pr_iph(icp, cc); 1862 1863 hlen = ip->ip_hl << 2; 1864 cp = (u_char *) &icp->icmp_data[hlen]; 1865 1866 if (ip->ip_p == IPPROTO_TCP) { 1867 if (pingflags & F_VERBOSE) 1868 (void)printf("\n TCP: from port %u, to port %u", 1869 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1870 } else if (ip->ip_p == IPPROTO_UDP) { 1871 if (pingflags & F_VERBOSE) 1872 (void)printf("\n UDP: from port %u, to port %u", 1873 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1874 } else if (ip->ip_p == IPPROTO_ICMP) { 1875 struct icmp icp2; 1876 (void) memcpy(&icp2, cp, sizeof(icp2)); 1877 if (icp2.icmp_type == ICMP_ECHO) { 1878 if (pingflags & F_VERBOSE) 1879 (void)printf("\n ID=%u icmp_seq=%u", 1880 ntohs((u_int16_t)icp2.icmp_id), 1881 ntohs((u_int16_t)icp2.icmp_seq)); 1882 else 1883 (void)printf(" for icmp_seq=%u", 1884 ntohs((u_int16_t)icp2.icmp_seq)); 1885 } 1886 } 1887 } 1888 1889 static void 1890 fill(void) 1891 { 1892 int i, j, k; 1893 char *cp; 1894 int pat[16]; 1895 1896 for (cp = fill_pat; *cp != '\0'; cp++) { 1897 if (!isxdigit((unsigned char)*cp)) 1898 break; 1899 } 1900 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1901 (void)fflush(stdout); 1902 errx(EXIT_FAILURE, "\"-p %s\": patterns must be specified with" 1903 " 1-32 hex digits\n", 1904 fill_pat); 1905 } 1906 1907 i = sscanf(fill_pat, 1908 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1909 &pat[0], &pat[1], &pat[2], &pat[3], 1910 &pat[4], &pat[5], &pat[6], &pat[7], 1911 &pat[8], &pat[9], &pat[10], &pat[11], 1912 &pat[12], &pat[13], &pat[14], &pat[15]); 1913 1914 for (k = phdrlen, j = 0; k < datalen; k++) { 1915 opack_icmp.icmp_data[k] = pat[j]; 1916 if (++j >= i) 1917 j = 0; 1918 } 1919 1920 if (!(pingflags & F_QUIET)) { 1921 (void)printf("PATTERN: 0x"); 1922 for (j=0; j<i; j++) 1923 (void)printf("%02x", 1924 (u_char)opack_icmp.icmp_data[phdrlen + j]); 1925 (void)printf("\n"); 1926 } 1927 1928 } 1929 1930 1931 static void 1932 rnd_fill(void) 1933 { 1934 static u_int32_t rnd; 1935 int i; 1936 1937 for (i = phdrlen; i < datalen; i++) { 1938 rnd = (3141592621U * rnd + 663896637U); 1939 opack_icmp.icmp_data[i] = rnd>>24; 1940 } 1941 } 1942 1943 1944 static void 1945 gethost(const char *arg, 1946 const char *name, 1947 struct sockaddr_in *sa, 1948 char *realname, 1949 int realname_len) 1950 { 1951 struct hostent *hp; 1952 1953 (void)memset(sa, 0, sizeof(*sa)); 1954 sa->sin_family = AF_INET; 1955 sa->sin_len = sizeof(struct sockaddr_in); 1956 1957 /* If it is an IP address, try to convert it to a name to 1958 * have something nice to display. 1959 */ 1960 if (inet_aton(name, &sa->sin_addr) != 0) { 1961 if (realname) { 1962 if (pingflags & F_NUMERIC) 1963 hp = 0; 1964 else 1965 hp = gethostbyaddr((char *)&sa->sin_addr, 1966 sizeof(sa->sin_addr), AF_INET); 1967 (void)strlcpy(realname, hp ? hp->h_name : name, 1968 realname_len); 1969 } 1970 return; 1971 } 1972 1973 hp = gethostbyname(name); 1974 if (!hp) 1975 errx(EXIT_FAILURE, "Cannot resolve \"%s\" (%s)", 1976 name, hstrerror(h_errno)); 1977 1978 if (hp->h_addrtype != AF_INET) 1979 errx(EXIT_FAILURE, "%s only supported with IP", arg); 1980 1981 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1982 1983 if (realname) 1984 (void)strlcpy(realname, hp->h_name, realname_len); 1985 } 1986 1987 1988 static void 1989 usage(void) 1990 { 1991 #ifdef IPSEC 1992 #ifdef IPSEC_POLICY_IPSEC 1993 #define IPSECOPT "\n [-E policy] " 1994 #else 1995 #define IPSECOPT "\n [-AE] " 1996 #endif /*IPSEC_POLICY_IPSEC*/ 1997 #else 1998 #define IPSECOPT "" 1999 #endif /*IPSEC*/ 2000 2001 (void)fprintf(stderr, "usage: \n" 2002 "%s [-aCDdfLnoPQqRrv] [-c count] [-g gateway] [-h host]" 2003 " [-I addr] [-i interval]\n" 2004 " [-l preload] [-p pattern] [-s size] [-T ttl] [-t tos]" 2005 " [-w maxwait] " IPSECOPT "host\n", 2006 getprogname()); 2007 exit(1); 2008 } 2009
Indexes created Tue Sep 30 20:09:53 GMT 2025