ping.c revision 1.107.4.2.2.1
1 /* $NetBSD: ping.c,v 1.107.4.2.2.1 2017/05/12 05:21:01 snj 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 1.107.4.2.2.1 2017/05/12 05:21:01 snj 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 #ifndef __NetBSD__ 164 static char *progname; 165 #define getprogname() (progname) 166 #define setprogname(name) ((void)(progname = (name))) 167 #endif 168 169 static char hostname[MAXHOSTNAMELEN]; 170 171 static struct { 172 struct ip o_ip; 173 char o_opt[MAX_IPOPTLEN]; 174 union { 175 u_char u_buf[MAXPACKET+offsetof(struct icmp, icmp_data)]; 176 struct icmp u_icmp; 177 } o_u; 178 } out_pack; 179 #define opack_icmp out_pack.o_u.u_icmp 180 static struct ip *opack_ip; 181 182 static char optspace[MAX_IPOPTLEN]; /* record route space */ 183 static int optlen; 184 185 static int npackets; /* total packets to send */ 186 static int preload; /* number of packets to "preload" */ 187 static int ntransmitted; /* output sequence # = #sent */ 188 static int ident; /* our ID, in network byte order */ 189 190 static int nreceived; /* # of packets we got back */ 191 192 static double interval; /* interval between packets */ 193 static struct timespec interval_tv; 194 static double tmin = 999999999.0; 195 static double tmax = 0.0; 196 static double tsum = 0.0; /* sum of all times */ 197 static double tsumsq = 0.0; 198 static double maxwait = 0.0; 199 200 static int bufspace = IP_MAXPACKET; 201 202 static struct timespec now, clear_cache, last_tx, next_tx, first_tx; 203 static struct timespec last_rx, first_rx; 204 static int lastrcvd = 1; /* last ping sent has been received */ 205 206 static struct timespec jiggle_time; 207 static int jiggle_cnt, total_jiggled, jiggle_direction = -1; 208 209 __dead static void doit(void); 210 static void prefinish(int); 211 static void prtsig(int); 212 __dead static void finish(int); 213 static void summary(int); 214 static void pinger(void); 215 static void fill(void); 216 static void rnd_fill(void); 217 static double diffsec(struct timespec *, struct timespec *); 218 #if 0 219 static void timespecadd(struct timespec *, struct timespec *); 220 #endif 221 static void sec_to_timespec(const double, struct timespec *); 222 static double timespec_to_sec(const struct timespec *); 223 static void pr_pack(u_char *, int, struct sockaddr_in *); 224 static u_int16_t in_cksum(u_int16_t *, u_int); 225 static void pr_saddr(u_char *); 226 static char *pr_addr(struct in_addr *); 227 static void pr_iph(struct icmp *, int); 228 static void pr_retip(struct icmp *, int); 229 static int pr_icmph(struct icmp *, struct sockaddr_in *, int); 230 static void jiggle(int), jiggle_flush(int); 231 static void gethost(const char *, const char *, 232 struct sockaddr_in *, char *, int); 233 __dead static void usage(void); 234 235 int 236 main(int argc, char *argv[]) 237 { 238 int c, i, on = 1, hostind = 0; 239 long l; 240 int len = -1, compat = 0; 241 u_char ttl = 0; 242 u_long tos = 0; 243 char *p; 244 #ifdef IPSEC 245 #ifdef IPSEC_POLICY_IPSEC 246 char *policy_in = NULL; 247 char *policy_out = NULL; 248 #endif 249 #endif 250 #ifdef SIGINFO 251 struct sigaction sa; 252 #endif 253 254 if (prog_init && prog_init() == -1) 255 err(EXIT_FAILURE, "init failed"); 256 257 if ((s = prog_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 258 err(EXIT_FAILURE, "Cannot create socket"); 259 if ((sloop = prog_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 260 err(EXIT_FAILURE, "Cannot create socket"); 261 262 /* 263 * sloop is never read on. This prevents packets from 264 * queueing in its recv buffer. 265 */ 266 if (prog_shutdown(sloop, SHUT_RD) == -1) 267 warn("Cannot shutdown for read"); 268 269 if (prog_setuid(prog_getuid()) == -1) 270 err(EXIT_FAILURE, "setuid"); 271 272 setprogname(argv[0]); 273 274 #ifndef IPSEC 275 #define IPSECOPT 276 #else 277 #ifdef IPSEC_POLICY_IPSEC 278 #define IPSECOPT "E:" 279 #else 280 #define IPSECOPT "AE" 281 #endif /*IPSEC_POLICY_IPSEC*/ 282 #endif 283 while ((c = getopt(argc, argv, 284 "ac:CdDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 285 #undef IPSECOPT 286 switch (c) { 287 case 'a': 288 pingflags |= F_AUDIBLE; 289 break; 290 case 'C': 291 compat = 1; 292 break; 293 case 'c': 294 l = strtol(optarg, &p, 0); 295 if (*p != '\0' || l <= 0) 296 errx(EXIT_FAILURE, 297 "Bad/invalid number of packets: %s", 298 optarg); 299 #if INT_MAX < LONG_MAX 300 if (l > INT_MAX) 301 errx(EXIT_FAILURE, 302 "Too many packets to count: %ld", l); 303 #endif 304 npackets = l; 305 break; 306 case 'D': 307 pingflags |= F_DF; 308 break; 309 case 'd': 310 options |= SO_DEBUG; 311 break; 312 case 'f': 313 pingflags |= F_FLOOD; 314 break; 315 case 'h': 316 hostind = optind-1; 317 break; 318 case 'i': /* wait between sending packets */ 319 interval = strtod(optarg, &p); 320 if (*p != '\0' || interval <= 0) 321 errx(EXIT_FAILURE, "Bad/invalid interval: %s", 322 optarg); 323 /* 324 * In order to avoid overflowing the microseconds 325 * argument of poll() the interval must be less than 326 * INT_MAX/1000. Limit it to one second less than 327 * that to be safe. 328 */ 329 if (interval >= INT_MAX/1000.0 - 1.0) 330 errx(EXIT_FAILURE, 331 "Timing interval %g too large", interval); 332 break; 333 case 'l': 334 l = strtol(optarg, &p, 0); 335 if (*p != '\0' || l < 0) 336 errx(EXIT_FAILURE, "Bad/invalid preload value: " 337 "%s", optarg); 338 #if INT_MAX < LONG_MAX 339 if (l > INT_MAX) 340 errx(EXIT_FAILURE, 341 "Too many preload packets: %ld", l); 342 #endif 343 preload = l; 344 break; 345 case 'n': 346 pingflags |= F_NUMERIC; 347 break; 348 case 'o': 349 pingflags |= F_ONCE; 350 break; 351 case 'p': /* fill buffer with user pattern */ 352 if (pingflags & F_PING_RANDOM) 353 errx(EXIT_FAILURE, 354 "Only one of -P and -p allowed"); 355 pingflags |= F_PING_FILLED; 356 fill_pat = optarg; 357 break; 358 case 'P': 359 if (pingflags & F_PING_FILLED) 360 errx(EXIT_FAILURE, 361 "Only one of -P and -p allowed"); 362 pingflags |= F_PING_RANDOM; 363 break; 364 case 'q': 365 pingflags |= F_QUIET; 366 break; 367 case 'Q': 368 pingflags |= F_SEMI_QUIET; 369 break; 370 case 'r': 371 options |= SO_DONTROUTE; 372 break; 373 case 's': /* size of packet to send */ 374 l = strtol(optarg, &p, 0); 375 if (*p != '\0' || l < 0) 376 errx(EXIT_FAILURE, 377 "Bad/invalid packet size: %s", optarg); 378 if (l > MAXPACKET) 379 errx(EXIT_FAILURE, "packet size is too large"); 380 len = (int)l; 381 break; 382 case 'v': 383 pingflags |= F_VERBOSE; 384 break; 385 case 'R': 386 pingflags |= F_RECORD_ROUTE; 387 break; 388 case 'L': 389 pingflags |= F_MCAST_NOLOOP; 390 break; 391 case 't': 392 tos = strtoul(optarg, &p, 0); 393 if (*p != '\0' || tos > 0xFF) 394 errx(EXIT_FAILURE, "bad tos value: %s", optarg); 395 break; 396 case 'T': 397 l = strtol(optarg, &p, 0); 398 if (*p != '\0' || l > 255 || l <= 0) 399 errx(EXIT_FAILURE, "ttl out of range: %s", 400 optarg); 401 ttl = (u_char)l; /* cannot check >255 otherwise */ 402 break; 403 case 'I': 404 pingflags |= F_SOURCE_ADDR; 405 gethost("-I", optarg, &src_addr, 0, 0); 406 break; 407 case 'g': 408 pingflags |= F_SOURCE_ROUTE; 409 gethost("-g", optarg, &send_addr, 0, 0); 410 break; 411 case 'w': 412 maxwait = strtod(optarg, &p); 413 if (*p != '\0' || maxwait <= 0) 414 errx(EXIT_FAILURE, "Bad/invalid maxwait time: " 415 "%s", optarg); 416 break; 417 #ifdef IPSEC 418 #ifdef IPSEC_POLICY_IPSEC 419 case 'E': 420 pingflags |= F_POLICY; 421 if (!strncmp("in", optarg, 2)) { 422 policy_in = strdup(optarg); 423 if (!policy_in) 424 err(EXIT_FAILURE, "strdup"); 425 } else if (!strncmp("out", optarg, 3)) { 426 policy_out = strdup(optarg); 427 if (!policy_out) 428 err(EXIT_FAILURE, "strdup"); 429 } else 430 errx(EXIT_FAILURE, "invalid security policy: " 431 "%s", optarg); 432 break; 433 #else 434 case 'A': 435 pingflags |= F_AUTHHDR; 436 break; 437 case 'E': 438 pingflags |= F_ENCRYPT; 439 break; 440 #endif /*IPSEC_POLICY_IPSEC*/ 441 #endif /*IPSEC*/ 442 default: 443 usage(); 444 break; 445 } 446 } 447 448 if (interval == 0) 449 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 450 #ifndef sgi 451 if (pingflags & F_FLOOD && prog_getuid()) 452 errx(EXIT_FAILURE, "Must be superuser to use -f"); 453 if (interval < 1.0 && prog_getuid()) 454 errx(EXIT_FAILURE, "Must be superuser to use < 1 sec " 455 "ping interval"); 456 if (preload > 0 && prog_getuid()) 457 errx(EXIT_FAILURE, "Must be superuser to use -l"); 458 #endif 459 sec_to_timespec(interval, &interval_tv); 460 461 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 462 warnx("Sorry, no audible output for flood pings"); 463 464 if (npackets != 0) { 465 npackets += preload; 466 } else { 467 npackets = INT_MAX; 468 } 469 470 if (hostind == 0) { 471 if (optind != argc-1) 472 usage(); 473 else 474 hostind = optind; 475 } 476 else if (hostind >= argc - 1) 477 usage(); 478 479 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 480 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 481 pingflags |= F_MCAST; 482 if (!(pingflags & F_SOURCE_ROUTE)) 483 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 484 485 loc_addr.sin_family = AF_INET; 486 loc_addr.sin_len = sizeof(struct sockaddr_in); 487 loc_addr.sin_addr.s_addr = htonl((127 << 24) + 1); 488 489 if (len != -1) 490 datalen = len; 491 else 492 datalen = 64 - PHDR_LEN; 493 if (!compat && datalen >= (int)PHDR64_LEN) { /* can we time them? */ 494 pingflags |= F_TIMING64; 495 phdrlen = PHDR64_LEN; 496 } else if (datalen >= (int)PHDR_LEN) { /* can we time them? */ 497 pingflags |= F_TIMING; 498 phdrlen = PHDR_LEN; 499 } else 500 phdrlen = 0; 501 502 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 503 if ((packet = malloc(packlen)) == NULL) 504 err(EXIT_FAILURE, "Can't allocate %d bytes", packlen); 505 506 if (pingflags & F_PING_FILLED) { 507 fill(); 508 } else if (pingflags & F_PING_RANDOM) { 509 rnd_fill(); 510 } else { 511 for (i = phdrlen; i < datalen; i++) 512 opack_icmp.icmp_data[i] = i; 513 } 514 515 ident = arc4random() & 0xFFFF; 516 517 if (options & SO_DEBUG) { 518 if (prog_setsockopt(s, SOL_SOCKET, SO_DEBUG, 519 (char *)&on, sizeof(on)) == -1) 520 warn("Can't turn on socket debugging"); 521 } 522 if (options & SO_DONTROUTE) { 523 if (prog_setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 524 (char *)&on, sizeof(on)) == -1) 525 warn("SO_DONTROUTE"); 526 } 527 528 if (options & SO_DEBUG) { 529 if (prog_setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 530 (char *)&on, sizeof(on)) == -1) 531 warn("Can't turn on socket debugging"); 532 } 533 if (options & SO_DONTROUTE) { 534 if (prog_setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 535 (char *)&on, sizeof(on)) == -1) 536 warn("SO_DONTROUTE"); 537 } 538 539 if (pingflags & F_SOURCE_ROUTE) { 540 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 541 optspace[IPOPT_OLEN] = optlen = 7; 542 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 543 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 544 sizeof(whereto.sin_addr)); 545 optspace[optlen++] = IPOPT_NOP; 546 } 547 if (pingflags & F_RECORD_ROUTE) { 548 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 549 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 550 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 551 optlen = MAX_IPOPTLEN; 552 } 553 /* this leaves opack_ip 0(mod 4) aligned */ 554 opack_ip = (struct ip *)((char *)&out_pack.o_ip 555 + sizeof(out_pack.o_opt) 556 - optlen); 557 (void) memcpy(opack_ip + 1, optspace, optlen); 558 559 if (prog_setsockopt(s, IPPROTO_IP, IP_HDRINCL, 560 (char *) &on, sizeof(on)) < 0) 561 err(EXIT_FAILURE, "Can't set special IP header"); 562 563 opack_ip->ip_v = IPVERSION; 564 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 565 opack_ip->ip_tos = tos; 566 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 567 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 568 opack_ip->ip_p = IPPROTO_ICMP; 569 opack_ip->ip_src = src_addr.sin_addr; 570 opack_ip->ip_dst = send_addr.sin_addr; 571 572 if (pingflags & F_MCAST) { 573 if (pingflags & F_MCAST_NOLOOP) { 574 u_char loop = 0; 575 if (prog_setsockopt(s, IPPROTO_IP, 576 IP_MULTICAST_LOOP, 577 (char *) &loop, 1) < 0) 578 err(EXIT_FAILURE, "Can't disable multicast loopback"); 579 } 580 581 if (ttl != 0 582 && prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 583 (char *) &ttl, 1) < 0) 584 err(EXIT_FAILURE, "Can't set multicast time-to-live"); 585 586 if ((pingflags & F_SOURCE_ADDR) 587 && prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 588 (char *) &src_addr.sin_addr, 589 sizeof(src_addr.sin_addr)) < 0) 590 err(EXIT_FAILURE, "Can't set multicast source interface"); 591 592 } else if (pingflags & F_SOURCE_ADDR) { 593 if (prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 594 (char *) &src_addr.sin_addr, 595 sizeof(src_addr.sin_addr)) < 0) 596 err(EXIT_FAILURE, "Can't set source interface/address"); 597 } 598 #ifdef IPSEC 599 #ifdef IPSEC_POLICY_IPSEC 600 { 601 char *buf; 602 if (pingflags & F_POLICY) { 603 if (policy_in != NULL) { 604 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 605 if (buf == NULL) 606 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 607 if (prog_setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 608 buf, ipsec_get_policylen(buf)) < 0) { 609 err(EXIT_FAILURE, "ipsec policy cannot be " 610 "configured"); 611 } 612 free(buf); 613 } 614 if (policy_out != NULL) { 615 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 616 if (buf == NULL) 617 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 618 if (prog_setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 619 buf, ipsec_get_policylen(buf)) < 0) { 620 err(EXIT_FAILURE, "ipsec policy cannot be " 621 "configured"); 622 } 623 free(buf); 624 } 625 } 626 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 627 if (buf == NULL) 628 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 629 if (prog_setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 630 buf, ipsec_get_policylen(buf)) < 0) { 631 #if 0 632 warnx("ipsec is not configured"); 633 #else 634 /* ignore it, should be okay */ 635 #endif 636 } 637 free(buf); 638 } 639 #else 640 { 641 int optval; 642 if (pingflags & F_AUTHHDR) { 643 optval = IPSEC_LEVEL_REQUIRE; 644 #ifdef IP_AUTH_TRANS_LEVEL 645 (void)prog_setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 646 (char *)&optval, sizeof(optval)); 647 #else 648 (void)prog_setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 649 (char *)&optval, sizeof(optval)); 650 #endif 651 } 652 if (pingflags & F_ENCRYPT) { 653 optval = IPSEC_LEVEL_REQUIRE; 654 (void)prog_setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 655 (char *)&optval, sizeof(optval)); 656 } 657 optval = IPSEC_LEVEL_BYPASS; 658 #ifdef IP_AUTH_TRANS_LEVEL 659 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 660 (char *)&optval, sizeof(optval)); 661 #else 662 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 663 (char *)&optval, sizeof(optval)); 664 #endif 665 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 666 (char *)&optval, sizeof(optval)); 667 } 668 #endif /*IPSEC_POLICY_IPSEC*/ 669 #endif /*IPSEC*/ 670 671 (void)printf("PING %s (%s): %d data bytes\n", hostname, 672 inet_ntoa(whereto.sin_addr), datalen); 673 674 /* When pinging the broadcast address, you can get a lot 675 * of answers. Doing something so evil is useful if you 676 * are trying to stress the ethernet, or just want to 677 * fill the arp cache to get some stuff for /etc/ethers. 678 */ 679 while (0 > prog_setsockopt(s, SOL_SOCKET, SO_RCVBUF, 680 (char*)&bufspace, sizeof(bufspace))) { 681 if ((bufspace -= 4096) <= 0) 682 err(EXIT_FAILURE, "Cannot set the receive buffer size"); 683 } 684 685 /* make it possible to send giant probes, but do not worry now 686 * if it fails, since we probably won't send giant probes. 687 */ 688 (void)prog_setsockopt(s, SOL_SOCKET, SO_SNDBUF, 689 (char*)&bufspace, sizeof(bufspace)); 690 691 (void)signal(SIGINT, prefinish); 692 693 #ifdef SIGINFO 694 sa.sa_handler = prtsig; 695 sa.sa_flags = SA_NOKERNINFO; 696 sigemptyset(&sa.sa_mask); 697 (void)sigaction(SIGINFO, &sa, NULL); 698 #else 699 (void)signal(SIGQUIT, prtsig); 700 #endif 701 (void)signal(SIGCONT, prtsig); 702 703 /* fire off them quickies */ 704 for (i = 0; i < preload; i++) { 705 clock_gettime(CLOCK_MONOTONIC, &now); 706 pinger(); 707 } 708 709 doit(); 710 return 0; 711 } 712 713 714 static void 715 doit(void) 716 { 717 int cc; 718 struct sockaddr_in from; 719 socklen_t fromlen; 720 double sec, last, d_last; 721 struct pollfd fdmaskp[1]; 722 723 (void)clock_gettime(CLOCK_MONOTONIC, &clear_cache); 724 if (maxwait != 0) { 725 last = timespec_to_sec(&clear_cache) + maxwait; 726 d_last = 0; 727 } else { 728 last = 0; 729 d_last = 365*24*60*60; 730 } 731 732 do { 733 clock_gettime(CLOCK_MONOTONIC, &now); 734 735 if (last != 0) 736 d_last = last - timespec_to_sec(&now); 737 738 if (ntransmitted < npackets && d_last > 0) { 739 /* send if within 100 usec or late for next packet */ 740 sec = diffsec(&next_tx, &now); 741 if (sec <= 0.0001 || 742 (lastrcvd && (pingflags & F_FLOOD))) { 743 pinger(); 744 sec = diffsec(&next_tx, &now); 745 } 746 if (sec < 0.0) 747 sec = 0.0; 748 if (d_last < sec) 749 sec = d_last; 750 751 } else { 752 /* For the last response, wait twice as long as the 753 * worst case seen, or 10 times as long as the 754 * maximum interpacket interval, whichever is longer. 755 */ 756 sec = MAX(2 * tmax, 10 * interval) - 757 diffsec(&now, &last_tx); 758 if (d_last < sec) 759 sec = d_last; 760 if (sec <= 0) 761 break; 762 } 763 764 fdmaskp[0].fd = s; 765 fdmaskp[0].events = POLLIN; 766 cc = prog_poll(fdmaskp, 1, (int)(sec * 1000)); 767 if (cc <= 0) { 768 if (cc < 0) { 769 if (errno == EINTR) 770 continue; 771 jiggle_flush(1); 772 err(EXIT_FAILURE, "poll"); 773 } 774 continue; 775 } 776 777 fromlen = sizeof(from); 778 cc = prog_recvfrom(s, (char *) packet, packlen, 779 0, (struct sockaddr *)&from, 780 &fromlen); 781 if (cc < 0) { 782 if (errno != EINTR) { 783 jiggle_flush(1); 784 warn("recvfrom"); 785 (void)fflush(stderr); 786 } 787 continue; 788 } 789 clock_gettime(CLOCK_MONOTONIC, &now); 790 pr_pack(packet, cc, &from); 791 792 } while (nreceived < npackets 793 && (nreceived == 0 || !(pingflags & F_ONCE))); 794 795 finish(0); 796 } 797 798 799 static void 800 jiggle_flush(int nl) /* new line if there are dots */ 801 { 802 int serrno = errno; 803 804 if (jiggle_cnt > 0) { 805 total_jiggled += jiggle_cnt; 806 jiggle_direction = 1; 807 do { 808 (void)putchar('.'); 809 } while (--jiggle_cnt > 0); 810 811 } else if (jiggle_cnt < 0) { 812 total_jiggled -= jiggle_cnt; 813 jiggle_direction = -1; 814 do { 815 (void)putchar('\b'); 816 } while (++jiggle_cnt < 0); 817 } 818 819 if (nl) { 820 if (total_jiggled != 0) 821 (void)putchar('\n'); 822 total_jiggled = 0; 823 jiggle_direction = -1; 824 } 825 826 (void)fflush(stdout); 827 (void)fflush(stderr); 828 jiggle_time = now; 829 errno = serrno; 830 } 831 832 833 /* jiggle the cursor for flood-ping 834 */ 835 static void 836 jiggle(int delta) 837 { 838 double dt; 839 840 if (pingflags & F_QUIET) 841 return; 842 843 /* do not back up into messages */ 844 if (total_jiggled+jiggle_cnt+delta < 0) 845 return; 846 847 jiggle_cnt += delta; 848 849 /* flush the FLOOD dots when things are quiet 850 * or occassionally to make the cursor jiggle. 851 */ 852 dt = diffsec(&last_tx, &jiggle_time); 853 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 854 jiggle_flush(0); 855 } 856 857 858 /* 859 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 860 * will be added on by the kernel. The ID field is our UNIX process ID, 861 * and the sequence number is an ascending integer. The first phdrlen bytes 862 * of the data portion are used to hold a UNIX "timeval" struct in VAX 863 * byte-order, to compute the round-trip time, or a UNIX "timespec" in native 864 * format. 865 */ 866 static void 867 pinger(void) 868 { 869 struct tv32 tv32; 870 int i, cc, sw; 871 872 opack_icmp.icmp_code = 0; 873 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 874 875 /* clear the cached route in the kernel after an ICMP 876 * response such as a Redirect is seen to stop causing 877 * more such packets. Also clear the cached route 878 * periodically in case of routing changes that make 879 * black holes come and go. 880 */ 881 if (clear_cache.tv_sec != now.tv_sec) { 882 opack_icmp.icmp_type = ICMP_ECHOREPLY; 883 opack_icmp.icmp_id = ~ident; 884 opack_icmp.icmp_cksum = 0; 885 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 886 ICMP_MINLEN); 887 sw = 0; 888 if (prog_setsockopt(sloop, IPPROTO_IP, IP_HDRINCL, 889 (char *)&sw, sizeof(sw)) < 0) 890 err(EXIT_FAILURE, "Can't turn off special IP header"); 891 if (prog_sendto(sloop, (char *) &opack_icmp, 892 ICMP_MINLEN, MSG_DONTROUTE, 893 (struct sockaddr *)&loc_addr, 894 sizeof(struct sockaddr_in)) < 0) { 895 /* 896 * XXX: we only report this as a warning in verbose 897 * mode because people get confused when they see 898 * this error when they are running in single user 899 * mode and they have not configured lo0 900 */ 901 if (pingflags & F_VERBOSE) 902 warn("failed to clear cached route"); 903 } 904 sw = 1; 905 if (prog_setsockopt(sloop, IPPROTO_IP, IP_HDRINCL, 906 (char *)&sw, sizeof(sw)) < 0) 907 err(EXIT_FAILURE, "Can't set special IP header"); 908 909 (void)clock_gettime(CLOCK_MONOTONIC, &clear_cache); 910 } 911 912 opack_icmp.icmp_type = ICMP_ECHO; 913 opack_icmp.icmp_id = ident; 914 915 if (pingflags & F_TIMING) { 916 tv32.tv32_sec = (uint32_t)htonl(now.tv_sec); 917 tv32.tv32_usec = htonl(now.tv_nsec / 1000); 918 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 919 } else if (pingflags & F_TIMING64) 920 (void) memcpy(&opack_icmp.icmp_data[0], &now, sizeof(now)); 921 922 cc = MAX(datalen, ICMP_MINLEN) + PHDR_LEN; 923 opack_icmp.icmp_cksum = 0; 924 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 925 926 cc += opack_ip->ip_hl<<2; 927 opack_ip->ip_len = cc; 928 i = prog_sendto(s, (char *) opack_ip, cc, 0, 929 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 930 if (i != cc) { 931 jiggle_flush(1); 932 if (i < 0) 933 warn("sendto"); 934 else 935 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 936 (void)fflush(stderr); 937 } 938 lastrcvd = 0; 939 940 CLR(ntransmitted); 941 ntransmitted++; 942 943 last_tx = now; 944 if (next_tx.tv_sec == 0) { 945 first_tx = now; 946 next_tx = now; 947 } 948 949 /* Transmit regularly, at always the same microsecond in the 950 * second when going at one packet per second. 951 * If we are at most 100 ms behind, send extras to get caught up. 952 * Otherwise, skip packets we were too slow to send. 953 */ 954 if (diffsec(&next_tx, &now) <= interval) { 955 do { 956 timespecadd(&next_tx, &interval_tv, &next_tx); 957 } while (diffsec(&next_tx, &now) < -0.1); 958 } 959 960 if (pingflags & F_FLOOD) 961 jiggle(1); 962 963 /* While the packet is going out, ready buffer for the next 964 * packet. Use a fast but not very good random number generator. 965 */ 966 if (pingflags & F_PING_RANDOM) 967 rnd_fill(); 968 } 969 970 971 static void 972 pr_pack_sub(int cc, 973 char *addr, 974 int seqno, 975 int dupflag, 976 int ttl, 977 double triptime) 978 { 979 jiggle_flush(1); 980 981 if (pingflags & F_FLOOD) 982 return; 983 984 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 985 if (dupflag) 986 (void)printf(" DUP!"); 987 (void)printf(" ttl=%d", ttl); 988 if (pingflags & (F_TIMING|F_TIMING64)) { 989 const unsigned int prec = (pingflags & F_TIMING64) != 0 ? 6 : 3; 990 991 (void)printf(" time=%.*f ms", prec, triptime*1000.0); 992 } 993 994 /* 995 * Send beep to stderr, since that's more likely than stdout 996 * to go to a terminal.. 997 */ 998 if (pingflags & F_AUDIBLE && !dupflag) 999 (void)fprintf(stderr,"\a"); 1000 } 1001 1002 1003 /* 1004 * Print out the packet, if it came from us. This logic is necessary 1005 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1006 * which arrive ('tis only fair). This permits multiple copies of this 1007 * program to be run without having intermingled output (or statistics!). 1008 */ 1009 static void 1010 pr_pack(u_char *buf, 1011 int tot_len, 1012 struct sockaddr_in *from) 1013 { 1014 struct ip *ip; 1015 struct icmp *icp; 1016 int i, j, net_len; 1017 u_char *cp; 1018 static int old_rrlen; 1019 static char old_rr[MAX_IPOPTLEN]; 1020 int hlen, dupflag = 0, dumped; 1021 double triptime = 0.0; 1022 #define PR_PACK_SUB() {if (!dumped) { \ 1023 dumped = 1; \ 1024 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 1025 ntohs((u_int16_t)icp->icmp_seq), \ 1026 dupflag, ip->ip_ttl, triptime);}} 1027 1028 /* Check the IP header */ 1029 ip = (struct ip *) buf; 1030 hlen = ip->ip_hl << 2; 1031 if (tot_len < hlen + ICMP_MINLEN) { 1032 if (pingflags & F_VERBOSE) { 1033 jiggle_flush(1); 1034 (void)printf("packet too short (%d bytes) from %s\n", 1035 tot_len, inet_ntoa(from->sin_addr)); 1036 } 1037 return; 1038 } 1039 1040 /* Now the ICMP part */ 1041 dumped = 0; 1042 net_len = tot_len - hlen; 1043 icp = (struct icmp *)(buf + hlen); 1044 if (icp->icmp_type == ICMP_ECHOREPLY 1045 && icp->icmp_id == ident) { 1046 1047 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 1048 lastrcvd = 1; 1049 last_rx = now; 1050 if (first_rx.tv_sec == 0) 1051 first_rx = last_rx; 1052 nreceived++; 1053 if (pingflags & (F_TIMING|F_TIMING64)) { 1054 struct timespec tv; 1055 1056 if (pingflags & F_TIMING) { 1057 struct tv32 tv32; 1058 1059 (void)memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 1060 tv.tv_sec = (uint32_t)ntohl(tv32.tv32_sec); 1061 tv.tv_nsec = ntohl(tv32.tv32_usec) * 1000; 1062 } else if (pingflags & F_TIMING64) 1063 (void)memcpy(&tv, icp->icmp_data, sizeof(tv)); 1064 else 1065 memset(&tv, 0, sizeof(tv)); /* XXX: gcc */ 1066 1067 triptime = diffsec(&last_rx, &tv); 1068 tsum += triptime; 1069 tsumsq += triptime * triptime; 1070 if (triptime < tmin) 1071 tmin = triptime; 1072 if (triptime > tmax) 1073 tmax = triptime; 1074 } 1075 1076 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1077 nrepeats++, nreceived--; 1078 dupflag=1; 1079 } else { 1080 SET(ntohs((u_int16_t)icp->icmp_seq)); 1081 } 1082 1083 if (tot_len != opack_ip->ip_len) { 1084 PR_PACK_SUB(); 1085 switch (opack_ip->ip_len - tot_len) { 1086 case MAX_IPOPTLEN: 1087 if ((pongflags & F_RECORD_ROUTE) != 0) 1088 break; 1089 if ((pingflags & F_RECORD_ROUTE) == 0) 1090 goto out; 1091 pongflags |= F_RECORD_ROUTE; 1092 (void)printf("\nremote host does not " 1093 "support record route"); 1094 break; 1095 case 8: 1096 if ((pongflags & F_SOURCE_ROUTE) != 0) 1097 break; 1098 if ((pingflags & F_SOURCE_ROUTE) == 0) 1099 goto out; 1100 pongflags |= F_SOURCE_ROUTE; 1101 (void)printf("\nremote host does not " 1102 "support source route"); 1103 break; 1104 default: 1105 out: 1106 (void)printf("\nwrong total length %d " 1107 "instead of %d", tot_len, opack_ip->ip_len); 1108 break; 1109 } 1110 } 1111 1112 if (!dupflag) { 1113 static u_int16_t last_seqno = 0xffff; 1114 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1115 u_int16_t gap = seqno - (last_seqno + 1); 1116 if (gap > 0 && gap < 0x8000 && 1117 (pingflags & F_VERBOSE)) { 1118 (void)printf("[*** sequence gap of %u " 1119 "packets from %u ... %u ***]\n", gap, 1120 (u_int16_t) (last_seqno + 1), 1121 (u_int16_t) (seqno - 1)); 1122 if (pingflags & F_QUIET) 1123 summary(0); 1124 } 1125 1126 if (gap < 0x8000) 1127 last_seqno = seqno; 1128 } 1129 1130 if (pingflags & F_QUIET) 1131 return; 1132 1133 if (!(pingflags & F_FLOOD)) 1134 PR_PACK_SUB(); 1135 1136 /* check the data */ 1137 if ((size_t)(tot_len - hlen) > 1138 offsetof(struct icmp, icmp_data) + datalen 1139 && !(pingflags & F_PING_RANDOM) 1140 && memcmp(icp->icmp_data + phdrlen, 1141 opack_icmp.icmp_data + phdrlen, 1142 datalen - phdrlen)) { 1143 for (i = phdrlen; i < datalen; i++) { 1144 if (icp->icmp_data[i] != 1145 opack_icmp.icmp_data[i]) 1146 break; 1147 } 1148 PR_PACK_SUB(); 1149 (void)printf("\nwrong data byte #%d should have been" 1150 " %#x but was %#x", i - phdrlen, 1151 (u_char)opack_icmp.icmp_data[i], 1152 (u_char)icp->icmp_data[i]); 1153 for (i = phdrlen; i < datalen; i++) { 1154 if ((i % 16) == 0) 1155 (void)printf("\n\t"); 1156 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1157 } 1158 } 1159 1160 } else { 1161 if (!pr_icmph(icp, from, net_len)) 1162 return; 1163 dumped = 2; 1164 } 1165 1166 /* Display any IP options */ 1167 cp = buf + sizeof(struct ip); 1168 while (hlen > (int)sizeof(struct ip)) { 1169 switch (*cp) { 1170 case IPOPT_EOL: 1171 hlen = 0; 1172 break; 1173 case IPOPT_LSRR: 1174 hlen -= 2; 1175 j = *++cp; 1176 ++cp; 1177 j -= IPOPT_MINOFF; 1178 if (j <= 0) 1179 continue; 1180 if (dumped <= 1) { 1181 j = ((j+3)/4)*4; 1182 hlen -= j; 1183 cp += j; 1184 break; 1185 } 1186 PR_PACK_SUB(); 1187 (void)printf("\nLSRR: "); 1188 for (;;) { 1189 pr_saddr(cp); 1190 cp += 4; 1191 hlen -= 4; 1192 j -= 4; 1193 if (j <= 0) 1194 break; 1195 (void)putchar('\n'); 1196 } 1197 break; 1198 case IPOPT_RR: 1199 j = *++cp; /* get length */ 1200 i = *++cp; /* and pointer */ 1201 hlen -= 2; 1202 if (i > j) 1203 i = j; 1204 i -= IPOPT_MINOFF; 1205 if (i <= 0) 1206 continue; 1207 if (dumped <= 1) { 1208 if (i == old_rrlen 1209 && !memcmp(cp, old_rr, i)) { 1210 if (dumped) 1211 (void)printf("\t(same route)"); 1212 j = ((i+3)/4)*4; 1213 hlen -= j; 1214 cp += j; 1215 break; 1216 } 1217 old_rrlen = i; 1218 (void) memcpy(old_rr, cp, i); 1219 } 1220 if (!dumped) { 1221 jiggle_flush(1); 1222 (void)printf("RR: "); 1223 dumped = 1; 1224 } else { 1225 (void)printf("\nRR: "); 1226 } 1227 for (;;) { 1228 pr_saddr(cp); 1229 cp += 4; 1230 hlen -= 4; 1231 i -= 4; 1232 if (i <= 0) 1233 break; 1234 (void)putchar('\n'); 1235 } 1236 break; 1237 case IPOPT_NOP: 1238 if (dumped <= 1) 1239 break; 1240 PR_PACK_SUB(); 1241 (void)printf("\nNOP"); 1242 break; 1243 #ifdef sgi 1244 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1245 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1246 case IPOPT_CIPSO: /* Commercial IPSO */ 1247 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1248 i = (unsigned)cp[1]; 1249 hlen -= i - 1; 1250 PR_PACK_SUB(); 1251 (void)printf("\nSEC:"); 1252 while (i--) { 1253 (void)printf(" %02x", *cp++); 1254 } 1255 cp--; 1256 break; 1257 } 1258 #endif 1259 default: 1260 PR_PACK_SUB(); 1261 (void)printf("\nunknown option 0x%x", *cp); 1262 break; 1263 } 1264 hlen--; 1265 cp++; 1266 } 1267 1268 if (dumped) { 1269 (void)putchar('\n'); 1270 (void)fflush(stdout); 1271 } else { 1272 jiggle(-1); 1273 } 1274 } 1275 1276 1277 /* Compute the IP checksum 1278 * This assumes the packet is less than 32K long. 1279 */ 1280 static u_int16_t 1281 in_cksum(u_int16_t *p, u_int len) 1282 { 1283 u_int32_t sum = 0; 1284 int nwords = len >> 1; 1285 1286 while (nwords-- != 0) 1287 sum += *p++; 1288 1289 if (len & 1) { 1290 union { 1291 u_int16_t w; 1292 u_int8_t c[2]; 1293 } u; 1294 u.c[0] = *(u_char *)p; 1295 u.c[1] = 0; 1296 sum += u.w; 1297 } 1298 1299 /* end-around-carry */ 1300 sum = (sum >> 16) + (sum & 0xffff); 1301 sum += (sum >> 16); 1302 return (~sum); 1303 } 1304 1305 1306 /* 1307 * compute the difference of two timespecs in seconds 1308 */ 1309 static double 1310 diffsec(struct timespec *timenow, 1311 struct timespec *then) 1312 { 1313 if (timenow->tv_sec == 0) 1314 return -1; 1315 return (timenow->tv_sec - then->tv_sec) 1316 * 1.0 + (timenow->tv_nsec - then->tv_nsec) / 1000000000.0; 1317 } 1318 1319 1320 #if 0 1321 static void 1322 timespecadd(struct timespec *t1, 1323 struct timespec *t2) 1324 { 1325 1326 t1->tv_sec += t2->tv_sec; 1327 if ((t1->tv_nsec += t2->tv_nsec) >= 1000000000) { 1328 t1->tv_sec++; 1329 t1->tv_nsec -= 1000000000; 1330 } 1331 } 1332 #endif 1333 1334 1335 static void 1336 sec_to_timespec(const double sec, struct timespec *tp) 1337 { 1338 tp->tv_sec = sec; 1339 tp->tv_nsec = (sec - tp->tv_sec) * 1000000000.0; 1340 } 1341 1342 1343 static double 1344 timespec_to_sec(const struct timespec *tp) 1345 { 1346 return tp->tv_sec + tp->tv_nsec / 1000000000.0; 1347 } 1348 1349 1350 /* 1351 * Print statistics. 1352 * Heavily buffered STDIO is used here, so that all the statistics 1353 * will be written with 1 sys-write call. This is nice when more 1354 * than one copy of the program is running on a terminal; it prevents 1355 * the statistics output from becomming intermingled. 1356 */ 1357 static void 1358 summary(int header) 1359 { 1360 jiggle_flush(1); 1361 1362 if (header) 1363 (void)printf("\n----%s PING Statistics----\n", hostname); 1364 (void)printf("%d packets transmitted, ", ntransmitted); 1365 (void)printf("%d packets received, ", nreceived); 1366 if (nrepeats) 1367 (void)printf("+%d duplicates, ", nrepeats); 1368 if (ntransmitted) { 1369 if (nreceived > ntransmitted) 1370 (void)printf("-- somebody's duplicating packets!"); 1371 else 1372 (void)printf("%.1f%% packet loss", 1373 (((ntransmitted-nreceived)*100.0) / 1374 ntransmitted)); 1375 } 1376 (void)printf("\n"); 1377 if (nreceived && (pingflags & (F_TIMING|F_TIMING64))) { 1378 double n = nreceived + nrepeats; 1379 double avg = (tsum / n); 1380 double variance = 0.0; 1381 const unsigned int prec = (pingflags & F_TIMING64) != 0 ? 6 : 3; 1382 if (n>1) 1383 variance = (tsumsq - n*avg*avg) /(n-1); 1384 1385 (void)printf("round-trip min/avg/max/stddev = " 1386 "%.*f/%.*f/%.*f/%.*f ms\n", 1387 prec, tmin * 1000.0, 1388 prec, avg * 1000.0, 1389 prec, tmax * 1000.0, 1390 prec, sqrt(variance) * 1000.0); 1391 if (pingflags & F_FLOOD) { 1392 double r = diffsec(&last_rx, &first_rx); 1393 double t = diffsec(&last_tx, &first_tx); 1394 if (r == 0) 1395 r = 0.0001; 1396 if (t == 0) 1397 t = 0.0001; 1398 (void)printf(" %.1f packets/sec sent, " 1399 " %.1f packets/sec received\n", 1400 ntransmitted/t, nreceived/r); 1401 } 1402 } 1403 } 1404 1405 1406 /* 1407 * Print statistics when SIGINFO is received. 1408 */ 1409 /* ARGSUSED */ 1410 static void 1411 prtsig(int dummy) 1412 { 1413 1414 summary(0); 1415 #ifndef SIGINFO 1416 (void)signal(SIGQUIT, prtsig); 1417 #endif 1418 } 1419 1420 1421 /* 1422 * On the first SIGINT, allow any outstanding packets to dribble in 1423 */ 1424 static void 1425 prefinish(int dummy) 1426 { 1427 if (lastrcvd /* quit now if caught up */ 1428 || nreceived == 0) /* or if remote is dead */ 1429 finish(0); 1430 1431 (void)signal(dummy, finish); /* do this only the 1st time */ 1432 1433 if (npackets > ntransmitted) /* let the normal limit work */ 1434 npackets = ntransmitted; 1435 } 1436 1437 /* 1438 * Print statistics and give up. 1439 */ 1440 /* ARGSUSED */ 1441 static void 1442 finish(int dummy) 1443 { 1444 #ifdef SIGINFO 1445 (void)signal(SIGINFO, SIG_DFL); 1446 #else 1447 (void)signal(SIGQUIT, SIG_DFL); 1448 #endif 1449 1450 summary(1); 1451 exit(nreceived > 0 ? 0 : 2); 1452 } 1453 1454 1455 static int /* 0=do not print it */ 1456 ck_pr_icmph(struct icmp *icp, 1457 struct sockaddr_in *from, 1458 int cc, 1459 int override) /* 1=override VERBOSE if interesting */ 1460 { 1461 int hlen; 1462 struct ip ipb, *ip = &ipb; 1463 struct icmp icp2b, *icp2 = &icp2b; 1464 int res; 1465 1466 if (pingflags & F_VERBOSE) { 1467 res = 1; 1468 jiggle_flush(1); 1469 } else { 1470 res = 0; 1471 } 1472 1473 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1474 hlen = ip->ip_hl << 2; 1475 if (ip->ip_p == IPPROTO_ICMP 1476 && hlen + 6 <= cc) { 1477 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1478 if (icp2->icmp_id == ident) { 1479 /* remember to clear route cached in kernel 1480 * if this non-Echo-Reply ICMP message was for one 1481 * of our packets. 1482 */ 1483 clear_cache.tv_sec = 0; 1484 1485 if (!res && override 1486 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1487 jiggle_flush(1); 1488 (void)printf("%d bytes from %s: ", 1489 cc, pr_addr(&from->sin_addr)); 1490 res = 1; 1491 } 1492 } 1493 } 1494 1495 return res; 1496 } 1497 1498 1499 /* 1500 * Print a descriptive string about an ICMP header other than an echo reply. 1501 */ 1502 static int /* 0=printed nothing */ 1503 pr_icmph(struct icmp *icp, 1504 struct sockaddr_in *from, 1505 int cc) 1506 { 1507 switch (icp->icmp_type ) { 1508 case ICMP_UNREACH: 1509 if (!ck_pr_icmph(icp, from, cc, 1)) 1510 return 0; 1511 switch (icp->icmp_code) { 1512 case ICMP_UNREACH_NET: 1513 (void)printf("Destination Net Unreachable"); 1514 break; 1515 case ICMP_UNREACH_HOST: 1516 (void)printf("Destination Host Unreachable"); 1517 break; 1518 case ICMP_UNREACH_PROTOCOL: 1519 (void)printf("Destination Protocol Unreachable"); 1520 break; 1521 case ICMP_UNREACH_PORT: 1522 (void)printf("Destination Port Unreachable"); 1523 break; 1524 case ICMP_UNREACH_NEEDFRAG: 1525 (void)printf("frag needed and DF set. Next MTU=%d", 1526 ntohs(icp->icmp_nextmtu)); 1527 break; 1528 case ICMP_UNREACH_SRCFAIL: 1529 (void)printf("Source Route Failed"); 1530 break; 1531 case ICMP_UNREACH_NET_UNKNOWN: 1532 (void)printf("Unreachable unknown net"); 1533 break; 1534 case ICMP_UNREACH_HOST_UNKNOWN: 1535 (void)printf("Unreachable unknown host"); 1536 break; 1537 case ICMP_UNREACH_ISOLATED: 1538 (void)printf("Unreachable host isolated"); 1539 break; 1540 case ICMP_UNREACH_NET_PROHIB: 1541 (void)printf("Net prohibited access"); 1542 break; 1543 case ICMP_UNREACH_HOST_PROHIB: 1544 (void)printf("Host prohibited access"); 1545 break; 1546 case ICMP_UNREACH_TOSNET: 1547 (void)printf("Bad TOS for net"); 1548 break; 1549 case ICMP_UNREACH_TOSHOST: 1550 (void)printf("Bad TOS for host"); 1551 break; 1552 case 13: 1553 (void)printf("Communication prohibited"); 1554 break; 1555 case 14: 1556 (void)printf("Host precedence violation"); 1557 break; 1558 case 15: 1559 (void)printf("Precedence cutoff"); 1560 break; 1561 default: 1562 (void)printf("Bad Destination Unreachable Code: %d", 1563 icp->icmp_code); 1564 break; 1565 } 1566 /* Print returned IP header information */ 1567 pr_retip(icp, cc); 1568 break; 1569 1570 case ICMP_SOURCEQUENCH: 1571 if (!ck_pr_icmph(icp, from, cc, 1)) 1572 return 0; 1573 (void)printf("Source Quench"); 1574 pr_retip(icp, cc); 1575 break; 1576 1577 case ICMP_REDIRECT: 1578 if (!ck_pr_icmph(icp, from, cc, 1)) 1579 return 0; 1580 switch (icp->icmp_code) { 1581 case ICMP_REDIRECT_NET: 1582 (void)printf("Redirect Network"); 1583 break; 1584 case ICMP_REDIRECT_HOST: 1585 (void)printf("Redirect Host"); 1586 break; 1587 case ICMP_REDIRECT_TOSNET: 1588 (void)printf("Redirect Type of Service and Network"); 1589 break; 1590 case ICMP_REDIRECT_TOSHOST: 1591 (void)printf("Redirect Type of Service and Host"); 1592 break; 1593 default: 1594 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1595 break; 1596 } 1597 (void)printf(" New router addr: %s", 1598 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1599 pr_retip(icp, cc); 1600 break; 1601 1602 case ICMP_ECHO: 1603 if (!ck_pr_icmph(icp, from, cc, 0)) 1604 return 0; 1605 (void)printf("Echo Request: ID=%d seq=%d", 1606 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1607 break; 1608 1609 case ICMP_ECHOREPLY: 1610 /* displaying other's pings is too noisey */ 1611 #if 0 1612 if (!ck_pr_icmph(icp, from, cc, 0)) 1613 return 0; 1614 (void)printf("Echo Reply: ID=%d seq=%d", 1615 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1616 break; 1617 #else 1618 return 0; 1619 #endif 1620 1621 case ICMP_ROUTERADVERT: 1622 if (!ck_pr_icmph(icp, from, cc, 0)) 1623 return 0; 1624 (void)printf("Router Discovery Advert"); 1625 break; 1626 1627 case ICMP_ROUTERSOLICIT: 1628 if (!ck_pr_icmph(icp, from, cc, 0)) 1629 return 0; 1630 (void)printf("Router Discovery Solicit"); 1631 break; 1632 1633 case ICMP_TIMXCEED: 1634 if (!ck_pr_icmph(icp, from, cc, 1)) 1635 return 0; 1636 switch (icp->icmp_code ) { 1637 case ICMP_TIMXCEED_INTRANS: 1638 (void)printf("Time To Live exceeded"); 1639 break; 1640 case ICMP_TIMXCEED_REASS: 1641 (void)printf("Frag reassembly time exceeded"); 1642 break; 1643 default: 1644 (void)printf("Time exceeded, Bad Code: %d", 1645 icp->icmp_code); 1646 break; 1647 } 1648 pr_retip(icp, cc); 1649 break; 1650 1651 case ICMP_PARAMPROB: 1652 if (!ck_pr_icmph(icp, from, cc, 1)) 1653 return 0; 1654 (void)printf("Parameter problem: pointer = 0x%02x", 1655 icp->icmp_hun.ih_pptr); 1656 pr_retip(icp, cc); 1657 break; 1658 1659 case ICMP_TSTAMP: 1660 if (!ck_pr_icmph(icp, from, cc, 0)) 1661 return 0; 1662 (void)printf("Timestamp"); 1663 break; 1664 1665 case ICMP_TSTAMPREPLY: 1666 if (!ck_pr_icmph(icp, from, cc, 0)) 1667 return 0; 1668 (void)printf("Timestamp Reply"); 1669 break; 1670 1671 case ICMP_IREQ: 1672 if (!ck_pr_icmph(icp, from, cc, 0)) 1673 return 0; 1674 (void)printf("Information Request"); 1675 break; 1676 1677 case ICMP_IREQREPLY: 1678 if (!ck_pr_icmph(icp, from, cc, 0)) 1679 return 0; 1680 (void)printf("Information Reply"); 1681 break; 1682 1683 case ICMP_MASKREQ: 1684 if (!ck_pr_icmph(icp, from, cc, 0)) 1685 return 0; 1686 (void)printf("Address Mask Request"); 1687 break; 1688 1689 case ICMP_MASKREPLY: 1690 if (!ck_pr_icmph(icp, from, cc, 0)) 1691 return 0; 1692 (void)printf("Address Mask Reply"); 1693 break; 1694 1695 default: 1696 if (!ck_pr_icmph(icp, from, cc, 0)) 1697 return 0; 1698 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1699 if (pingflags & F_VERBOSE) 1700 pr_iph(icp, cc); 1701 } 1702 1703 return 1; 1704 } 1705 1706 1707 /* 1708 * Print an IP header with options. 1709 */ 1710 static void 1711 pr_iph(struct icmp *icp, 1712 int cc) 1713 { 1714 int hlen; 1715 u_char *cp; 1716 struct ip ipb, *ip = &ipb; 1717 1718 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1719 1720 hlen = ip->ip_hl << 2; 1721 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1722 1723 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1724 (void)printf(" %1x %1x %02x %04x %04x", 1725 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1726 (void)printf(" %1x %04x", 1727 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1728 (void)printf(" %02x %02x %04x", 1729 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1730 (void)printf(" %15s ", 1731 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1732 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1733 /* dump any option bytes */ 1734 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1735 (void)printf("%02x", *cp++); 1736 } 1737 } 1738 1739 /* 1740 * Print an ASCII host address starting from a string of bytes. 1741 */ 1742 static void 1743 pr_saddr(u_char *cp) 1744 { 1745 n_long l; 1746 struct in_addr addr; 1747 1748 l = (u_char)*++cp; 1749 l = (l<<8) + (u_char)*++cp; 1750 l = (l<<8) + (u_char)*++cp; 1751 l = (l<<8) + (u_char)*++cp; 1752 addr.s_addr = htonl(l); 1753 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1754 } 1755 1756 1757 /* 1758 * Return an ASCII host address 1759 * as a dotted quad and optionally with a hostname 1760 */ 1761 static char * 1762 pr_addr(struct in_addr *addr) /* in network order */ 1763 { 1764 struct hostent *hp; 1765 static char buf[MAXHOSTNAMELEN+4+16+1]; 1766 1767 if ((pingflags & F_NUMERIC) 1768 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1769 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1770 } else { 1771 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1772 inet_ntoa(*addr)); 1773 } 1774 1775 return buf; 1776 } 1777 1778 /* 1779 * Dump some info on a returned (via ICMP) IP packet. 1780 */ 1781 static void 1782 pr_retip(struct icmp *icp, 1783 int cc) 1784 { 1785 int hlen; 1786 u_char *cp; 1787 struct ip ipb, *ip = &ipb; 1788 1789 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1790 1791 if (pingflags & F_VERBOSE) 1792 pr_iph(icp, cc); 1793 1794 hlen = ip->ip_hl << 2; 1795 cp = (u_char *) &icp->icmp_data[hlen]; 1796 1797 if (ip->ip_p == IPPROTO_TCP) { 1798 if (pingflags & F_VERBOSE) 1799 (void)printf("\n TCP: from port %u, to port %u", 1800 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1801 } else if (ip->ip_p == IPPROTO_UDP) { 1802 if (pingflags & F_VERBOSE) 1803 (void)printf("\n UDP: from port %u, to port %u", 1804 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1805 } else if (ip->ip_p == IPPROTO_ICMP) { 1806 struct icmp icp2; 1807 (void) memcpy(&icp2, cp, sizeof(icp2)); 1808 if (icp2.icmp_type == ICMP_ECHO) { 1809 if (pingflags & F_VERBOSE) 1810 (void)printf("\n ID=%u icmp_seq=%u", 1811 ntohs((u_int16_t)icp2.icmp_id), 1812 ntohs((u_int16_t)icp2.icmp_seq)); 1813 else 1814 (void)printf(" for icmp_seq=%u", 1815 ntohs((u_int16_t)icp2.icmp_seq)); 1816 } 1817 } 1818 } 1819 1820 static void 1821 fill(void) 1822 { 1823 int i, j, k; 1824 char *cp; 1825 int pat[16]; 1826 1827 for (cp = fill_pat; *cp != '\0'; cp++) { 1828 if (!isxdigit((unsigned char)*cp)) 1829 break; 1830 } 1831 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1832 (void)fflush(stdout); 1833 errx(EXIT_FAILURE, "\"-p %s\": patterns must be specified with" 1834 " 1-32 hex digits\n", 1835 fill_pat); 1836 } 1837 1838 i = sscanf(fill_pat, 1839 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1840 &pat[0], &pat[1], &pat[2], &pat[3], 1841 &pat[4], &pat[5], &pat[6], &pat[7], 1842 &pat[8], &pat[9], &pat[10], &pat[11], 1843 &pat[12], &pat[13], &pat[14], &pat[15]); 1844 1845 for (k = phdrlen, j = 0; k < datalen; k++) { 1846 opack_icmp.icmp_data[k] = pat[j]; 1847 if (++j >= i) 1848 j = 0; 1849 } 1850 1851 if (!(pingflags & F_QUIET)) { 1852 (void)printf("PATTERN: 0x"); 1853 for (j=0; j<i; j++) 1854 (void)printf("%02x", 1855 (u_char)opack_icmp.icmp_data[phdrlen + j]); 1856 (void)printf("\n"); 1857 } 1858 1859 } 1860 1861 1862 static void 1863 rnd_fill(void) 1864 { 1865 static u_int32_t rnd; 1866 int i; 1867 1868 for (i = phdrlen; i < datalen; i++) { 1869 rnd = (3141592621U * rnd + 663896637U); 1870 opack_icmp.icmp_data[i] = rnd>>24; 1871 } 1872 } 1873 1874 1875 static void 1876 gethost(const char *arg, 1877 const char *name, 1878 struct sockaddr_in *sa, 1879 char *realname, 1880 int realname_len) 1881 { 1882 struct hostent *hp; 1883 1884 (void)memset(sa, 0, sizeof(*sa)); 1885 sa->sin_family = AF_INET; 1886 sa->sin_len = sizeof(struct sockaddr_in); 1887 1888 /* If it is an IP address, try to convert it to a name to 1889 * have something nice to display. 1890 */ 1891 if (inet_aton(name, &sa->sin_addr) != 0) { 1892 if (realname) { 1893 if (pingflags & F_NUMERIC) 1894 hp = 0; 1895 else 1896 hp = gethostbyaddr((char *)&sa->sin_addr, 1897 sizeof(sa->sin_addr), AF_INET); 1898 (void)strlcpy(realname, hp ? hp->h_name : name, 1899 realname_len); 1900 } 1901 return; 1902 } 1903 1904 hp = gethostbyname(name); 1905 if (!hp) 1906 errx(EXIT_FAILURE, "Cannot resolve \"%s\" (%s)", 1907 name, hstrerror(h_errno)); 1908 1909 if (hp->h_addrtype != AF_INET) 1910 errx(EXIT_FAILURE, "%s only supported with IP", arg); 1911 1912 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1913 1914 if (realname) 1915 (void)strlcpy(realname, hp->h_name, realname_len); 1916 } 1917 1918 1919 static void 1920 usage(void) 1921 { 1922 #ifdef IPSEC 1923 #ifdef IPSEC_POLICY_IPSEC 1924 #define IPSECOPT "\n [-E policy] " 1925 #else 1926 #define IPSECOPT "\n [-AE] " 1927 #endif /*IPSEC_POLICY_IPSEC*/ 1928 #else 1929 #define IPSECOPT "" 1930 #endif /*IPSEC*/ 1931 1932 (void)fprintf(stderr, "usage: \n" 1933 "%s [-aCDdfLnoPQqRrv] [-c count] [-g gateway] [-h host]" 1934 " [-I addr] [-i interval]\n" 1935 " [-l preload] [-p pattern] [-s size] [-T ttl] [-t tos]" 1936 " [-w maxwait] " IPSECOPT "host\n", 1937 getprogname()); 1938 exit(1); 1939 } 1940
Indexes created Tue Oct 21 06:10:07 GMT 2025